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1// SPDX-License-Identifier: GPL-2.0
2#undef BLOCKMOVE
3#define Z_WAKE
4#undef Z_EXT_CHARS_IN_BUFFER
5
6/*
7 * This file contains the driver for the Cyclades async multiport
8 * serial boards.
9 *
10 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
11 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
12 *
13 * Copyright (C) 2007-2009 Jiri Slaby <jirislaby@gmail.com>
14 *
15 * Much of the design and some of the code came from serial.c
16 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
17 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
18 * and then fixed as suggested by Michael K. Johnson 12/12/92.
19 * Converted to pci probing and cleaned up by Jiri Slaby.
20 *
21 */
22
23#define CY_VERSION "2.6"
24
25/* If you need to install more boards than NR_CARDS, change the constant
26 in the definition below. No other change is necessary to support up to
27 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
28
29#define NR_CARDS 4
30
31/*
32 If the total number of ports is larger than NR_PORTS, change this
33 constant in the definition below. No other change is necessary to
34 support more boards/ports. */
35
36#define NR_PORTS 256
37
38#define ZO_V1 0
39#define ZO_V2 1
40#define ZE_V1 2
41
42#define SERIAL_PARANOIA_CHECK
43#undef CY_DEBUG_OPEN
44#undef CY_DEBUG_THROTTLE
45#undef CY_DEBUG_OTHER
46#undef CY_DEBUG_IO
47#undef CY_DEBUG_COUNT
48#undef CY_DEBUG_DTR
49#undef CY_DEBUG_INTERRUPTS
50#undef CY_16Y_HACK
51#undef CY_ENABLE_MONITORING
52#undef CY_PCI_DEBUG
53
54/*
55 * Include section
56 */
57#include <linux/module.h>
58#include <linux/errno.h>
59#include <linux/signal.h>
60#include <linux/sched.h>
61#include <linux/timer.h>
62#include <linux/interrupt.h>
63#include <linux/tty.h>
64#include <linux/tty_flip.h>
65#include <linux/serial.h>
66#include <linux/major.h>
67#include <linux/string.h>
68#include <linux/fcntl.h>
69#include <linux/ptrace.h>
70#include <linux/cyclades.h>
71#include <linux/mm.h>
72#include <linux/ioport.h>
73#include <linux/init.h>
74#include <linux/delay.h>
75#include <linux/spinlock.h>
76#include <linux/bitops.h>
77#include <linux/firmware.h>
78#include <linux/device.h>
79#include <linux/slab.h>
80
81#include <linux/io.h>
82#include <linux/uaccess.h>
83
84#include <linux/kernel.h>
85#include <linux/pci.h>
86
87#include <linux/stat.h>
88#include <linux/proc_fs.h>
89#include <linux/seq_file.h>
90
91static void cy_send_xchar(struct tty_struct *tty, char ch);
92
93#ifndef SERIAL_XMIT_SIZE
94#define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
95#endif
96
97/* firmware stuff */
98#define ZL_MAX_BLOCKS 16
99#define DRIVER_VERSION 0x02010203
100#define RAM_SIZE 0x80000
101
102enum zblock_type {
103 ZBLOCK_PRG = 0,
104 ZBLOCK_FPGA = 1
105};
106
107struct zfile_header {
108 char name[64];
109 char date[32];
110 char aux[32];
111 u32 n_config;
112 u32 config_offset;
113 u32 n_blocks;
114 u32 block_offset;
115 u32 reserved[9];
116} __attribute__ ((packed));
117
118struct zfile_config {
119 char name[64];
120 u32 mailbox;
121 u32 function;
122 u32 n_blocks;
123 u32 block_list[ZL_MAX_BLOCKS];
124} __attribute__ ((packed));
125
126struct zfile_block {
127 u32 type;
128 u32 file_offset;
129 u32 ram_offset;
130 u32 size;
131} __attribute__ ((packed));
132
133static struct tty_driver *cy_serial_driver;
134
135#ifdef CONFIG_ISA
136/* This is the address lookup table. The driver will probe for
137 Cyclom-Y/ISA boards at all addresses in here. If you want the
138 driver to probe addresses at a different address, add it to
139 this table. If the driver is probing some other board and
140 causing problems, remove the offending address from this table.
141*/
142
143static unsigned int cy_isa_addresses[] = {
144 0xD0000,
145 0xD2000,
146 0xD4000,
147 0xD6000,
148 0xD8000,
149 0xDA000,
150 0xDC000,
151 0xDE000,
152 0, 0, 0, 0, 0, 0, 0, 0
153};
154
155#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
156
157static long maddr[NR_CARDS];
158static int irq[NR_CARDS];
159
160module_param_hw_array(maddr, long, iomem, NULL, 0);
161module_param_hw_array(irq, int, irq, NULL, 0);
162
163#endif /* CONFIG_ISA */
164
165/* This is the per-card data structure containing address, irq, number of
166 channels, etc. This driver supports a maximum of NR_CARDS cards.
167*/
168static struct cyclades_card cy_card[NR_CARDS];
169
170static int cy_next_channel; /* next minor available */
171
172/*
173 * This is used to look up the divisor speeds and the timeouts
174 * We're normally limited to 15 distinct baud rates. The extra
175 * are accessed via settings in info->port.flags.
176 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
177 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
178 * HI VHI
179 * 20
180 */
181static const int baud_table[] = {
182 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
183 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
184 230400, 0
185};
186
187static const char baud_co_25[] = { /* 25 MHz clock option table */
188 /* value => 00 01 02 03 04 */
189 /* divide by 8 32 128 512 2048 */
190 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
191 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
192};
193
194static const char baud_bpr_25[] = { /* 25 MHz baud rate period table */
195 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
196 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
197};
198
199static const char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
200 /* value => 00 01 02 03 04 */
201 /* divide by 8 32 128 512 2048 */
202 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
203 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
204 0x00
205};
206
207static const char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
208 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
209 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
210 0x21
211};
212
213static const char baud_cor3[] = { /* receive threshold */
214 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
215 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
216 0x07
217};
218
219/*
220 * The Cyclades driver implements HW flow control as any serial driver.
221 * The cyclades_port structure member rflow and the vector rflow_thr
222 * allows us to take advantage of a special feature in the CD1400 to avoid
223 * data loss even when the system interrupt latency is too high. These flags
224 * are to be used only with very special applications. Setting these flags
225 * requires the use of a special cable (DTR and RTS reversed). In the new
226 * CD1400-based boards (rev. 6.00 or later), there is no need for special
227 * cables.
228 */
229
230static const char rflow_thr[] = { /* rflow threshold */
231 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
232 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
233 0x0a
234};
235
236/* The Cyclom-Ye has placed the sequential chips in non-sequential
237 * address order. This look-up table overcomes that problem.
238 */
239static const unsigned int cy_chip_offset[] = { 0x0000,
240 0x0400,
241 0x0800,
242 0x0C00,
243 0x0200,
244 0x0600,
245 0x0A00,
246 0x0E00
247};
248
249/* PCI related definitions */
250
251#ifdef CONFIG_PCI
252static const struct pci_device_id cy_pci_dev_id[] = {
253 /* PCI < 1Mb */
254 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
255 /* PCI > 1Mb */
256 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
257 /* 4Y PCI < 1Mb */
258 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
259 /* 4Y PCI > 1Mb */
260 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
261 /* 8Y PCI < 1Mb */
262 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
263 /* 8Y PCI > 1Mb */
264 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
265 /* Z PCI < 1Mb */
266 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
267 /* Z PCI > 1Mb */
268 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
269 { } /* end of table */
270};
271MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
272#endif
273
274static void cy_start(struct tty_struct *);
275static void cy_set_line_char(struct cyclades_port *, struct tty_struct *);
276static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
277#ifdef CONFIG_ISA
278static unsigned detect_isa_irq(void __iomem *);
279#endif /* CONFIG_ISA */
280
281#ifndef CONFIG_CYZ_INTR
282static void cyz_poll(struct timer_list *);
283
284/* The Cyclades-Z polling cycle is defined by this variable */
285static long cyz_polling_cycle = CZ_DEF_POLL;
286
287static DEFINE_TIMER(cyz_timerlist, cyz_poll);
288
289#else /* CONFIG_CYZ_INTR */
290static void cyz_rx_restart(struct timer_list *);
291#endif /* CONFIG_CYZ_INTR */
292
293static void cyy_writeb(struct cyclades_port *port, u32 reg, u8 val)
294{
295 struct cyclades_card *card = port->card;
296
297 cy_writeb(port->u.cyy.base_addr + (reg << card->bus_index), val);
298}
299
300static u8 cyy_readb(struct cyclades_port *port, u32 reg)
301{
302 struct cyclades_card *card = port->card;
303
304 return readb(port->u.cyy.base_addr + (reg << card->bus_index));
305}
306
307static inline bool cy_is_Z(struct cyclades_card *card)
308{
309 return card->num_chips == (unsigned int)-1;
310}
311
312static inline bool __cyz_fpga_loaded(struct RUNTIME_9060 __iomem *ctl_addr)
313{
314 return readl(&ctl_addr->init_ctrl) & (1 << 17);
315}
316
317static inline bool cyz_fpga_loaded(struct cyclades_card *card)
318{
319 return __cyz_fpga_loaded(card->ctl_addr.p9060);
320}
321
322static bool cyz_is_loaded(struct cyclades_card *card)
323{
324 struct FIRM_ID __iomem *fw_id = card->base_addr + ID_ADDRESS;
325
326 return (card->hw_ver == ZO_V1 || cyz_fpga_loaded(card)) &&
327 readl(&fw_id->signature) == ZFIRM_ID;
328}
329
330static int serial_paranoia_check(struct cyclades_port *info,
331 const char *name, const char *routine)
332{
333#ifdef SERIAL_PARANOIA_CHECK
334 if (!info) {
335 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
336 "in %s\n", name, routine);
337 return 1;
338 }
339
340 if (info->magic != CYCLADES_MAGIC) {
341 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
342 "struct (%s) in %s\n", name, routine);
343 return 1;
344 }
345#endif
346 return 0;
347}
348
349/***********************************************************/
350/********* Start of block of Cyclom-Y specific code ********/
351
352/* This routine waits up to 1000 micro-seconds for the previous
353 command to the Cirrus chip to complete and then issues the
354 new command. An error is returned if the previous command
355 didn't finish within the time limit.
356
357 This function is only called from inside spinlock-protected code.
358 */
359static int __cyy_issue_cmd(void __iomem *base_addr, u8 cmd, int index)
360{
361 void __iomem *ccr = base_addr + (CyCCR << index);
362 unsigned int i;
363
364 /* Check to see that the previous command has completed */
365 for (i = 0; i < 100; i++) {
366 if (readb(ccr) == 0)
367 break;
368 udelay(10L);
369 }
370 /* if the CCR never cleared, the previous command
371 didn't finish within the "reasonable time" */
372 if (i == 100)
373 return -1;
374
375 /* Issue the new command */
376 cy_writeb(ccr, cmd);
377
378 return 0;
379}
380
381static inline int cyy_issue_cmd(struct cyclades_port *port, u8 cmd)
382{
383 return __cyy_issue_cmd(port->u.cyy.base_addr, cmd,
384 port->card->bus_index);
385}
386
387#ifdef CONFIG_ISA
388/* ISA interrupt detection code */
389static unsigned detect_isa_irq(void __iomem *address)
390{
391 int irq;
392 unsigned long irqs, flags;
393 int save_xir, save_car;
394 int index = 0; /* IRQ probing is only for ISA */
395
396 /* forget possible initially masked and pending IRQ */
397 irq = probe_irq_off(probe_irq_on());
398
399 /* Clear interrupts on the board first */
400 cy_writeb(address + (Cy_ClrIntr << index), 0);
401 /* Cy_ClrIntr is 0x1800 */
402
403 irqs = probe_irq_on();
404 /* Wait ... */
405 msleep(5);
406
407 /* Enable the Tx interrupts on the CD1400 */
408 local_irq_save(flags);
409 cy_writeb(address + (CyCAR << index), 0);
410 __cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
411
412 cy_writeb(address + (CyCAR << index), 0);
413 cy_writeb(address + (CySRER << index),
414 readb(address + (CySRER << index)) | CyTxRdy);
415 local_irq_restore(flags);
416
417 /* Wait ... */
418 msleep(5);
419
420 /* Check which interrupt is in use */
421 irq = probe_irq_off(irqs);
422
423 /* Clean up */
424 save_xir = (u_char) readb(address + (CyTIR << index));
425 save_car = readb(address + (CyCAR << index));
426 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
427 cy_writeb(address + (CySRER << index),
428 readb(address + (CySRER << index)) & ~CyTxRdy);
429 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
430 cy_writeb(address + (CyCAR << index), (save_car));
431 cy_writeb(address + (Cy_ClrIntr << index), 0);
432 /* Cy_ClrIntr is 0x1800 */
433
434 return (irq > 0) ? irq : 0;
435}
436#endif /* CONFIG_ISA */
437
438static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
439 void __iomem *base_addr)
440{
441 struct cyclades_port *info;
442 struct tty_port *port;
443 int len, index = cinfo->bus_index;
444 u8 ivr, save_xir, channel, save_car, data, char_count;
445
446#ifdef CY_DEBUG_INTERRUPTS
447 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
448#endif
449 /* determine the channel & change to that context */
450 save_xir = readb(base_addr + (CyRIR << index));
451 channel = save_xir & CyIRChannel;
452 info = &cinfo->ports[channel + chip * 4];
453 port = &info->port;
454 save_car = cyy_readb(info, CyCAR);
455 cyy_writeb(info, CyCAR, save_xir);
456 ivr = cyy_readb(info, CyRIVR) & CyIVRMask;
457
458 /* there is an open port for this data */
459 if (ivr == CyIVRRxEx) { /* exception */
460 data = cyy_readb(info, CyRDSR);
461
462 /* For statistics only */
463 if (data & CyBREAK)
464 info->icount.brk++;
465 else if (data & CyFRAME)
466 info->icount.frame++;
467 else if (data & CyPARITY)
468 info->icount.parity++;
469 else if (data & CyOVERRUN)
470 info->icount.overrun++;
471
472 if (data & info->ignore_status_mask) {
473 info->icount.rx++;
474 return;
475 }
476 if (tty_buffer_request_room(port, 1)) {
477 if (data & info->read_status_mask) {
478 if (data & CyBREAK) {
479 tty_insert_flip_char(port,
480 cyy_readb(info, CyRDSR),
481 TTY_BREAK);
482 info->icount.rx++;
483 if (port->flags & ASYNC_SAK) {
484 struct tty_struct *tty =
485 tty_port_tty_get(port);
486 if (tty) {
487 do_SAK(tty);
488 tty_kref_put(tty);
489 }
490 }
491 } else if (data & CyFRAME) {
492 tty_insert_flip_char(port,
493 cyy_readb(info, CyRDSR),
494 TTY_FRAME);
495 info->icount.rx++;
496 info->idle_stats.frame_errs++;
497 } else if (data & CyPARITY) {
498 /* Pieces of seven... */
499 tty_insert_flip_char(port,
500 cyy_readb(info, CyRDSR),
501 TTY_PARITY);
502 info->icount.rx++;
503 info->idle_stats.parity_errs++;
504 } else if (data & CyOVERRUN) {
505 tty_insert_flip_char(port, 0,
506 TTY_OVERRUN);
507 info->icount.rx++;
508 /* If the flip buffer itself is
509 overflowing, we still lose
510 the next incoming character.
511 */
512 tty_insert_flip_char(port,
513 cyy_readb(info, CyRDSR),
514 TTY_FRAME);
515 info->icount.rx++;
516 info->idle_stats.overruns++;
517 /* These two conditions may imply */
518 /* a normal read should be done. */
519 /* } else if(data & CyTIMEOUT) { */
520 /* } else if(data & CySPECHAR) { */
521 } else {
522 tty_insert_flip_char(port, 0,
523 TTY_NORMAL);
524 info->icount.rx++;
525 }
526 } else {
527 tty_insert_flip_char(port, 0, TTY_NORMAL);
528 info->icount.rx++;
529 }
530 } else {
531 /* there was a software buffer overrun and nothing
532 * could be done about it!!! */
533 info->icount.buf_overrun++;
534 info->idle_stats.overruns++;
535 }
536 } else { /* normal character reception */
537 /* load # chars available from the chip */
538 char_count = cyy_readb(info, CyRDCR);
539
540#ifdef CY_ENABLE_MONITORING
541 ++info->mon.int_count;
542 info->mon.char_count += char_count;
543 if (char_count > info->mon.char_max)
544 info->mon.char_max = char_count;
545 info->mon.char_last = char_count;
546#endif
547 len = tty_buffer_request_room(port, char_count);
548 while (len--) {
549 data = cyy_readb(info, CyRDSR);
550 tty_insert_flip_char(port, data, TTY_NORMAL);
551 info->idle_stats.recv_bytes++;
552 info->icount.rx++;
553#ifdef CY_16Y_HACK
554 udelay(10L);
555#endif
556 }
557 info->idle_stats.recv_idle = jiffies;
558 }
559 tty_schedule_flip(port);
560
561 /* end of service */
562 cyy_writeb(info, CyRIR, save_xir & 0x3f);
563 cyy_writeb(info, CyCAR, save_car);
564}
565
566static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
567 void __iomem *base_addr)
568{
569 struct cyclades_port *info;
570 struct tty_struct *tty;
571 int char_count, index = cinfo->bus_index;
572 u8 save_xir, channel, save_car, outch;
573
574 /* Since we only get here when the transmit buffer
575 is empty, we know we can always stuff a dozen
576 characters. */
577#ifdef CY_DEBUG_INTERRUPTS
578 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
579#endif
580
581 /* determine the channel & change to that context */
582 save_xir = readb(base_addr + (CyTIR << index));
583 channel = save_xir & CyIRChannel;
584 save_car = readb(base_addr + (CyCAR << index));
585 cy_writeb(base_addr + (CyCAR << index), save_xir);
586
587 info = &cinfo->ports[channel + chip * 4];
588 tty = tty_port_tty_get(&info->port);
589 if (tty == NULL) {
590 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy);
591 goto end;
592 }
593
594 /* load the on-chip space for outbound data */
595 char_count = info->xmit_fifo_size;
596
597 if (info->x_char) { /* send special char */
598 outch = info->x_char;
599 cyy_writeb(info, CyTDR, outch);
600 char_count--;
601 info->icount.tx++;
602 info->x_char = 0;
603 }
604
605 if (info->breakon || info->breakoff) {
606 if (info->breakon) {
607 cyy_writeb(info, CyTDR, 0);
608 cyy_writeb(info, CyTDR, 0x81);
609 info->breakon = 0;
610 char_count -= 2;
611 }
612 if (info->breakoff) {
613 cyy_writeb(info, CyTDR, 0);
614 cyy_writeb(info, CyTDR, 0x83);
615 info->breakoff = 0;
616 char_count -= 2;
617 }
618 }
619
620 while (char_count-- > 0) {
621 if (!info->xmit_cnt) {
622 if (cyy_readb(info, CySRER) & CyTxMpty) {
623 cyy_writeb(info, CySRER,
624 cyy_readb(info, CySRER) & ~CyTxMpty);
625 } else {
626 cyy_writeb(info, CySRER, CyTxMpty |
627 (cyy_readb(info, CySRER) & ~CyTxRdy));
628 }
629 goto done;
630 }
631 if (info->port.xmit_buf == NULL) {
632 cyy_writeb(info, CySRER,
633 cyy_readb(info, CySRER) & ~CyTxRdy);
634 goto done;
635 }
636 if (tty->stopped || tty->hw_stopped) {
637 cyy_writeb(info, CySRER,
638 cyy_readb(info, CySRER) & ~CyTxRdy);
639 goto done;
640 }
641 /* Because the Embedded Transmit Commands have been enabled,
642 * we must check to see if the escape character, NULL, is being
643 * sent. If it is, we must ensure that there is room for it to
644 * be doubled in the output stream. Therefore we no longer
645 * advance the pointer when the character is fetched, but
646 * rather wait until after the check for a NULL output
647 * character. This is necessary because there may not be room
648 * for the two chars needed to send a NULL.)
649 */
650 outch = info->port.xmit_buf[info->xmit_tail];
651 if (outch) {
652 info->xmit_cnt--;
653 info->xmit_tail = (info->xmit_tail + 1) &
654 (SERIAL_XMIT_SIZE - 1);
655 cyy_writeb(info, CyTDR, outch);
656 info->icount.tx++;
657 } else {
658 if (char_count > 1) {
659 info->xmit_cnt--;
660 info->xmit_tail = (info->xmit_tail + 1) &
661 (SERIAL_XMIT_SIZE - 1);
662 cyy_writeb(info, CyTDR, outch);
663 cyy_writeb(info, CyTDR, 0);
664 info->icount.tx++;
665 char_count--;
666 }
667 }
668 }
669
670done:
671 tty_wakeup(tty);
672 tty_kref_put(tty);
673end:
674 /* end of service */
675 cyy_writeb(info, CyTIR, save_xir & 0x3f);
676 cyy_writeb(info, CyCAR, save_car);
677}
678
679static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
680 void __iomem *base_addr)
681{
682 struct cyclades_port *info;
683 struct tty_struct *tty;
684 int index = cinfo->bus_index;
685 u8 save_xir, channel, save_car, mdm_change, mdm_status;
686
687 /* determine the channel & change to that context */
688 save_xir = readb(base_addr + (CyMIR << index));
689 channel = save_xir & CyIRChannel;
690 info = &cinfo->ports[channel + chip * 4];
691 save_car = cyy_readb(info, CyCAR);
692 cyy_writeb(info, CyCAR, save_xir);
693
694 mdm_change = cyy_readb(info, CyMISR);
695 mdm_status = cyy_readb(info, CyMSVR1);
696
697 tty = tty_port_tty_get(&info->port);
698 if (!tty)
699 goto end;
700
701 if (mdm_change & CyANY_DELTA) {
702 /* For statistics only */
703 if (mdm_change & CyDCD)
704 info->icount.dcd++;
705 if (mdm_change & CyCTS)
706 info->icount.cts++;
707 if (mdm_change & CyDSR)
708 info->icount.dsr++;
709 if (mdm_change & CyRI)
710 info->icount.rng++;
711
712 wake_up_interruptible(&info->port.delta_msr_wait);
713 }
714
715 if ((mdm_change & CyDCD) && tty_port_check_carrier(&info->port)) {
716 if (mdm_status & CyDCD)
717 wake_up_interruptible(&info->port.open_wait);
718 else
719 tty_hangup(tty);
720 }
721 if ((mdm_change & CyCTS) && tty_port_cts_enabled(&info->port)) {
722 if (tty->hw_stopped) {
723 if (mdm_status & CyCTS) {
724 /* cy_start isn't used
725 because... !!! */
726 tty->hw_stopped = 0;
727 cyy_writeb(info, CySRER,
728 cyy_readb(info, CySRER) | CyTxRdy);
729 tty_wakeup(tty);
730 }
731 } else {
732 if (!(mdm_status & CyCTS)) {
733 /* cy_stop isn't used
734 because ... !!! */
735 tty->hw_stopped = 1;
736 cyy_writeb(info, CySRER,
737 cyy_readb(info, CySRER) & ~CyTxRdy);
738 }
739 }
740 }
741/* if (mdm_change & CyDSR) {
742 }
743 if (mdm_change & CyRI) {
744 }*/
745 tty_kref_put(tty);
746end:
747 /* end of service */
748 cyy_writeb(info, CyMIR, save_xir & 0x3f);
749 cyy_writeb(info, CyCAR, save_car);
750}
751
752/* The real interrupt service routine is called
753 whenever the card wants its hand held--chars
754 received, out buffer empty, modem change, etc.
755 */
756static irqreturn_t cyy_interrupt(int irq, void *dev_id)
757{
758 int status;
759 struct cyclades_card *cinfo = dev_id;
760 void __iomem *base_addr, *card_base_addr;
761 unsigned int chip, too_many, had_work;
762 int index;
763
764 if (unlikely(cinfo == NULL)) {
765#ifdef CY_DEBUG_INTERRUPTS
766 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
767 irq);
768#endif
769 return IRQ_NONE; /* spurious interrupt */
770 }
771
772 card_base_addr = cinfo->base_addr;
773 index = cinfo->bus_index;
774
775 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
776 if (unlikely(card_base_addr == NULL))
777 return IRQ_HANDLED;
778
779 /* This loop checks all chips in the card. Make a note whenever
780 _any_ chip had some work to do, as this is considered an
781 indication that there will be more to do. Only when no chip
782 has any work does this outermost loop exit.
783 */
784 do {
785 had_work = 0;
786 for (chip = 0; chip < cinfo->num_chips; chip++) {
787 base_addr = cinfo->base_addr +
788 (cy_chip_offset[chip] << index);
789 too_many = 0;
790 while ((status = readb(base_addr +
791 (CySVRR << index))) != 0x00) {
792 had_work++;
793 /* The purpose of the following test is to ensure that
794 no chip can monopolize the driver. This forces the
795 chips to be checked in a round-robin fashion (after
796 draining each of a bunch (1000) of characters).
797 */
798 if (1000 < too_many++)
799 break;
800 spin_lock(&cinfo->card_lock);
801 if (status & CySRReceive) /* rx intr */
802 cyy_chip_rx(cinfo, chip, base_addr);
803 if (status & CySRTransmit) /* tx intr */
804 cyy_chip_tx(cinfo, chip, base_addr);
805 if (status & CySRModem) /* modem intr */
806 cyy_chip_modem(cinfo, chip, base_addr);
807 spin_unlock(&cinfo->card_lock);
808 }
809 }
810 } while (had_work);
811
812 /* clear interrupts */
813 spin_lock(&cinfo->card_lock);
814 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
815 /* Cy_ClrIntr is 0x1800 */
816 spin_unlock(&cinfo->card_lock);
817 return IRQ_HANDLED;
818} /* cyy_interrupt */
819
820static void cyy_change_rts_dtr(struct cyclades_port *info, unsigned int set,
821 unsigned int clear)
822{
823 struct cyclades_card *card = info->card;
824 int channel = info->line - card->first_line;
825 u32 rts, dtr, msvrr, msvrd;
826
827 channel &= 0x03;
828
829 if (info->rtsdtr_inv) {
830 msvrr = CyMSVR2;
831 msvrd = CyMSVR1;
832 rts = CyDTR;
833 dtr = CyRTS;
834 } else {
835 msvrr = CyMSVR1;
836 msvrd = CyMSVR2;
837 rts = CyRTS;
838 dtr = CyDTR;
839 }
840 if (set & TIOCM_RTS) {
841 cyy_writeb(info, CyCAR, channel);
842 cyy_writeb(info, msvrr, rts);
843 }
844 if (clear & TIOCM_RTS) {
845 cyy_writeb(info, CyCAR, channel);
846 cyy_writeb(info, msvrr, ~rts);
847 }
848 if (set & TIOCM_DTR) {
849 cyy_writeb(info, CyCAR, channel);
850 cyy_writeb(info, msvrd, dtr);
851#ifdef CY_DEBUG_DTR
852 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
853 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
854 cyy_readb(info, CyMSVR1),
855 cyy_readb(info, CyMSVR2));
856#endif
857 }
858 if (clear & TIOCM_DTR) {
859 cyy_writeb(info, CyCAR, channel);
860 cyy_writeb(info, msvrd, ~dtr);
861#ifdef CY_DEBUG_DTR
862 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
863 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
864 cyy_readb(info, CyMSVR1),
865 cyy_readb(info, CyMSVR2));
866#endif
867 }
868}
869
870/***********************************************************/
871/********* End of block of Cyclom-Y specific code **********/
872/******** Start of block of Cyclades-Z specific code *******/
873/***********************************************************/
874
875static int
876cyz_fetch_msg(struct cyclades_card *cinfo,
877 __u32 *channel, __u8 *cmd, __u32 *param)
878{
879 struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
880 unsigned long loc_doorbell;
881
882 loc_doorbell = readl(&cinfo->ctl_addr.p9060->loc_doorbell);
883 if (loc_doorbell) {
884 *cmd = (char)(0xff & loc_doorbell);
885 *channel = readl(&board_ctrl->fwcmd_channel);
886 *param = (__u32) readl(&board_ctrl->fwcmd_param);
887 cy_writel(&cinfo->ctl_addr.p9060->loc_doorbell, 0xffffffff);
888 return 1;
889 }
890 return 0;
891} /* cyz_fetch_msg */
892
893static int
894cyz_issue_cmd(struct cyclades_card *cinfo,
895 __u32 channel, __u8 cmd, __u32 param)
896{
897 struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
898 __u32 __iomem *pci_doorbell;
899 unsigned int index;
900
901 if (!cyz_is_loaded(cinfo))
902 return -1;
903
904 index = 0;
905 pci_doorbell = &cinfo->ctl_addr.p9060->pci_doorbell;
906 while ((readl(pci_doorbell) & 0xff) != 0) {
907 if (index++ == 1000)
908 return (int)(readl(pci_doorbell) & 0xff);
909 udelay(50L);
910 }
911 cy_writel(&board_ctrl->hcmd_channel, channel);
912 cy_writel(&board_ctrl->hcmd_param, param);
913 cy_writel(pci_doorbell, (long)cmd);
914
915 return 0;
916} /* cyz_issue_cmd */
917
918static void cyz_handle_rx(struct cyclades_port *info)
919{
920 struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
921 struct cyclades_card *cinfo = info->card;
922 struct tty_port *port = &info->port;
923 unsigned int char_count;
924 int len;
925#ifdef BLOCKMOVE
926 unsigned char *buf;
927#else
928 char data;
929#endif
930 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
931
932 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
933 rx_put = readl(&buf_ctrl->rx_put);
934 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
935 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
936 if (rx_put >= rx_get)
937 char_count = rx_put - rx_get;
938 else
939 char_count = rx_put - rx_get + rx_bufsize;
940
941 if (!char_count)
942 return;
943
944#ifdef CY_ENABLE_MONITORING
945 info->mon.int_count++;
946 info->mon.char_count += char_count;
947 if (char_count > info->mon.char_max)
948 info->mon.char_max = char_count;
949 info->mon.char_last = char_count;
950#endif
951
952#ifdef BLOCKMOVE
953 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
954 for performance, but because of buffer boundaries, there
955 may be several steps to the operation */
956 while (1) {
957 len = tty_prepare_flip_string(port, &buf,
958 char_count);
959 if (!len)
960 break;
961
962 len = min_t(unsigned int, min(len, char_count),
963 rx_bufsize - new_rx_get);
964
965 memcpy_fromio(buf, cinfo->base_addr +
966 rx_bufaddr + new_rx_get, len);
967
968 new_rx_get = (new_rx_get + len) &
969 (rx_bufsize - 1);
970 char_count -= len;
971 info->icount.rx += len;
972 info->idle_stats.recv_bytes += len;
973 }
974#else
975 len = tty_buffer_request_room(port, char_count);
976 while (len--) {
977 data = readb(cinfo->base_addr + rx_bufaddr +
978 new_rx_get);
979 new_rx_get = (new_rx_get + 1) &
980 (rx_bufsize - 1);
981 tty_insert_flip_char(port, data, TTY_NORMAL);
982 info->idle_stats.recv_bytes++;
983 info->icount.rx++;
984 }
985#endif
986#ifdef CONFIG_CYZ_INTR
987 /* Recalculate the number of chars in the RX buffer and issue
988 a cmd in case it's higher than the RX high water mark */
989 rx_put = readl(&buf_ctrl->rx_put);
990 if (rx_put >= rx_get)
991 char_count = rx_put - rx_get;
992 else
993 char_count = rx_put - rx_get + rx_bufsize;
994 if (char_count >= readl(&buf_ctrl->rx_threshold) &&
995 !timer_pending(&info->rx_full_timer))
996 mod_timer(&info->rx_full_timer, jiffies + 1);
997#endif
998 info->idle_stats.recv_idle = jiffies;
999 tty_schedule_flip(&info->port);
1000
1001 /* Update rx_get */
1002 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1003}
1004
1005static void cyz_handle_tx(struct cyclades_port *info)
1006{
1007 struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
1008 struct cyclades_card *cinfo = info->card;
1009 struct tty_struct *tty;
1010 u8 data;
1011 unsigned int char_count;
1012#ifdef BLOCKMOVE
1013 int small_count;
1014#endif
1015 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1016
1017 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1018 return;
1019
1020 tx_get = readl(&buf_ctrl->tx_get);
1021 tx_put = readl(&buf_ctrl->tx_put);
1022 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1023 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1024 if (tx_put >= tx_get)
1025 char_count = tx_get - tx_put - 1 + tx_bufsize;
1026 else
1027 char_count = tx_get - tx_put - 1;
1028
1029 if (!char_count)
1030 return;
1031
1032 tty = tty_port_tty_get(&info->port);
1033 if (tty == NULL)
1034 goto ztxdone;
1035
1036 if (info->x_char) { /* send special char */
1037 data = info->x_char;
1038
1039 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1040 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1041 info->x_char = 0;
1042 char_count--;
1043 info->icount.tx++;
1044 }
1045#ifdef BLOCKMOVE
1046 while (0 < (small_count = min_t(unsigned int,
1047 tx_bufsize - tx_put, min_t(unsigned int,
1048 (SERIAL_XMIT_SIZE - info->xmit_tail),
1049 min_t(unsigned int, info->xmit_cnt,
1050 char_count))))) {
1051
1052 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr + tx_put),
1053 &info->port.xmit_buf[info->xmit_tail],
1054 small_count);
1055
1056 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1057 char_count -= small_count;
1058 info->icount.tx += small_count;
1059 info->xmit_cnt -= small_count;
1060 info->xmit_tail = (info->xmit_tail + small_count) &
1061 (SERIAL_XMIT_SIZE - 1);
1062 }
1063#else
1064 while (info->xmit_cnt && char_count) {
1065 data = info->port.xmit_buf[info->xmit_tail];
1066 info->xmit_cnt--;
1067 info->xmit_tail = (info->xmit_tail + 1) &
1068 (SERIAL_XMIT_SIZE - 1);
1069
1070 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1071 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1072 char_count--;
1073 info->icount.tx++;
1074 }
1075#endif
1076 tty_wakeup(tty);
1077 tty_kref_put(tty);
1078ztxdone:
1079 /* Update tx_put */
1080 cy_writel(&buf_ctrl->tx_put, tx_put);
1081}
1082
1083static void cyz_handle_cmd(struct cyclades_card *cinfo)
1084{
1085 struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
1086 struct cyclades_port *info;
1087 __u32 channel, param, fw_ver;
1088 __u8 cmd;
1089 int special_count;
1090 int delta_count;
1091
1092 fw_ver = readl(&board_ctrl->fw_version);
1093
1094 while (cyz_fetch_msg(cinfo, &channel, &cmd, ¶m) == 1) {
1095 special_count = 0;
1096 delta_count = 0;
1097 info = &cinfo->ports[channel];
1098
1099 switch (cmd) {
1100 case C_CM_PR_ERROR:
1101 tty_insert_flip_char(&info->port, 0, TTY_PARITY);
1102 info->icount.rx++;
1103 special_count++;
1104 break;
1105 case C_CM_FR_ERROR:
1106 tty_insert_flip_char(&info->port, 0, TTY_FRAME);
1107 info->icount.rx++;
1108 special_count++;
1109 break;
1110 case C_CM_RXBRK:
1111 tty_insert_flip_char(&info->port, 0, TTY_BREAK);
1112 info->icount.rx++;
1113 special_count++;
1114 break;
1115 case C_CM_MDCD:
1116 info->icount.dcd++;
1117 delta_count++;
1118 if (tty_port_check_carrier(&info->port)) {
1119 u32 dcd = fw_ver > 241 ? param :
1120 readl(&info->u.cyz.ch_ctrl->rs_status);
1121 if (dcd & C_RS_DCD)
1122 wake_up_interruptible(&info->port.open_wait);
1123 else
1124 tty_port_tty_hangup(&info->port, false);
1125 }
1126 break;
1127 case C_CM_MCTS:
1128 info->icount.cts++;
1129 delta_count++;
1130 break;
1131 case C_CM_MRI:
1132 info->icount.rng++;
1133 delta_count++;
1134 break;
1135 case C_CM_MDSR:
1136 info->icount.dsr++;
1137 delta_count++;
1138 break;
1139#ifdef Z_WAKE
1140 case C_CM_IOCTLW:
1141 complete(&info->shutdown_wait);
1142 break;
1143#endif
1144#ifdef CONFIG_CYZ_INTR
1145 case C_CM_RXHIWM:
1146 case C_CM_RXNNDT:
1147 case C_CM_INTBACK2:
1148 /* Reception Interrupt */
1149#ifdef CY_DEBUG_INTERRUPTS
1150 printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1151 "port %ld\n", info->card, channel);
1152#endif
1153 cyz_handle_rx(info);
1154 break;
1155 case C_CM_TXBEMPTY:
1156 case C_CM_TXLOWWM:
1157 case C_CM_INTBACK:
1158 /* Transmission Interrupt */
1159#ifdef CY_DEBUG_INTERRUPTS
1160 printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1161 "port %ld\n", info->card, channel);
1162#endif
1163 cyz_handle_tx(info);
1164 break;
1165#endif /* CONFIG_CYZ_INTR */
1166 case C_CM_FATAL:
1167 /* should do something with this !!! */
1168 break;
1169 default:
1170 break;
1171 }
1172 if (delta_count)
1173 wake_up_interruptible(&info->port.delta_msr_wait);
1174 if (special_count)
1175 tty_schedule_flip(&info->port);
1176 }
1177}
1178
1179#ifdef CONFIG_CYZ_INTR
1180static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1181{
1182 struct cyclades_card *cinfo = dev_id;
1183
1184 if (unlikely(!cyz_is_loaded(cinfo))) {
1185#ifdef CY_DEBUG_INTERRUPTS
1186 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1187 "(IRQ%d).\n", irq);
1188#endif
1189 return IRQ_NONE;
1190 }
1191
1192 /* Handle the interrupts */
1193 cyz_handle_cmd(cinfo);
1194
1195 return IRQ_HANDLED;
1196} /* cyz_interrupt */
1197
1198static void cyz_rx_restart(struct timer_list *t)
1199{
1200 struct cyclades_port *info = from_timer(info, t, rx_full_timer);
1201 struct cyclades_card *card = info->card;
1202 int retval;
1203 __u32 channel = info->line - card->first_line;
1204 unsigned long flags;
1205
1206 spin_lock_irqsave(&card->card_lock, flags);
1207 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1208 if (retval != 0) {
1209 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1210 info->line, retval);
1211 }
1212 spin_unlock_irqrestore(&card->card_lock, flags);
1213}
1214
1215#else /* CONFIG_CYZ_INTR */
1216
1217static void cyz_poll(struct timer_list *unused)
1218{
1219 struct cyclades_card *cinfo;
1220 struct cyclades_port *info;
1221 unsigned long expires = jiffies + HZ;
1222 unsigned int port, card;
1223
1224 for (card = 0; card < NR_CARDS; card++) {
1225 cinfo = &cy_card[card];
1226
1227 if (!cy_is_Z(cinfo))
1228 continue;
1229 if (!cyz_is_loaded(cinfo))
1230 continue;
1231
1232 /* Skip first polling cycle to avoid racing conditions with the FW */
1233 if (!cinfo->intr_enabled) {
1234 cinfo->intr_enabled = 1;
1235 continue;
1236 }
1237
1238 cyz_handle_cmd(cinfo);
1239
1240 for (port = 0; port < cinfo->nports; port++) {
1241 info = &cinfo->ports[port];
1242
1243 if (!info->throttle)
1244 cyz_handle_rx(info);
1245 cyz_handle_tx(info);
1246 }
1247 /* poll every 'cyz_polling_cycle' period */
1248 expires = jiffies + cyz_polling_cycle;
1249 }
1250 mod_timer(&cyz_timerlist, expires);
1251} /* cyz_poll */
1252
1253#endif /* CONFIG_CYZ_INTR */
1254
1255/********** End of block of Cyclades-Z specific code *********/
1256/***********************************************************/
1257
1258/* This is called whenever a port becomes active;
1259 interrupts are enabled and DTR & RTS are turned on.
1260 */
1261static int cy_startup(struct cyclades_port *info, struct tty_struct *tty)
1262{
1263 struct cyclades_card *card;
1264 unsigned long flags;
1265 int retval = 0;
1266 int channel;
1267 unsigned long page;
1268
1269 card = info->card;
1270 channel = info->line - card->first_line;
1271
1272 page = get_zeroed_page(GFP_KERNEL);
1273 if (!page)
1274 return -ENOMEM;
1275
1276 spin_lock_irqsave(&card->card_lock, flags);
1277
1278 if (tty_port_initialized(&info->port))
1279 goto errout;
1280
1281 if (!info->type) {
1282 set_bit(TTY_IO_ERROR, &tty->flags);
1283 goto errout;
1284 }
1285
1286 if (info->port.xmit_buf)
1287 free_page(page);
1288 else
1289 info->port.xmit_buf = (unsigned char *)page;
1290
1291 spin_unlock_irqrestore(&card->card_lock, flags);
1292
1293 cy_set_line_char(info, tty);
1294
1295 if (!cy_is_Z(card)) {
1296 channel &= 0x03;
1297
1298 spin_lock_irqsave(&card->card_lock, flags);
1299
1300 cyy_writeb(info, CyCAR, channel);
1301
1302 cyy_writeb(info, CyRTPR,
1303 (info->default_timeout ? info->default_timeout : 0x02));
1304 /* 10ms rx timeout */
1305
1306 cyy_issue_cmd(info, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR);
1307
1308 cyy_change_rts_dtr(info, TIOCM_RTS | TIOCM_DTR, 0);
1309
1310 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyRxData);
1311 } else {
1312 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
1313
1314 if (!cyz_is_loaded(card))
1315 return -ENODEV;
1316
1317#ifdef CY_DEBUG_OPEN
1318 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
1319 "base_addr %p\n", card, channel, card->base_addr);
1320#endif
1321 spin_lock_irqsave(&card->card_lock, flags);
1322
1323 cy_writel(&ch_ctrl->op_mode, C_CH_ENABLE);
1324#ifdef Z_WAKE
1325#ifdef CONFIG_CYZ_INTR
1326 cy_writel(&ch_ctrl->intr_enable,
1327 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1328 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1329#else
1330 cy_writel(&ch_ctrl->intr_enable,
1331 C_IN_IOCTLW | C_IN_MDCD);
1332#endif /* CONFIG_CYZ_INTR */
1333#else
1334#ifdef CONFIG_CYZ_INTR
1335 cy_writel(&ch_ctrl->intr_enable,
1336 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1337 C_IN_RXNNDT | C_IN_MDCD);
1338#else
1339 cy_writel(&ch_ctrl->intr_enable, C_IN_MDCD);
1340#endif /* CONFIG_CYZ_INTR */
1341#endif /* Z_WAKE */
1342
1343 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
1344 if (retval != 0) {
1345 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
1346 "%x\n", info->line, retval);
1347 }
1348
1349 /* Flush RX buffers before raising DTR and RTS */
1350 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
1351 if (retval != 0) {
1352 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
1353 "%x\n", info->line, retval);
1354 }
1355
1356 /* set timeout !!! */
1357 /* set RTS and DTR !!! */
1358 tty_port_raise_dtr_rts(&info->port);
1359
1360 /* enable send, recv, modem !!! */
1361 }
1362
1363 tty_port_set_initialized(&info->port, 1);
1364
1365 clear_bit(TTY_IO_ERROR, &tty->flags);
1366 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1367 info->breakon = info->breakoff = 0;
1368 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1369 info->idle_stats.in_use =
1370 info->idle_stats.recv_idle =
1371 info->idle_stats.xmit_idle = jiffies;
1372
1373 spin_unlock_irqrestore(&card->card_lock, flags);
1374
1375#ifdef CY_DEBUG_OPEN
1376 printk(KERN_DEBUG "cyc startup done\n");
1377#endif
1378 return 0;
1379
1380errout:
1381 spin_unlock_irqrestore(&card->card_lock, flags);
1382 free_page(page);
1383 return retval;
1384} /* startup */
1385
1386static void start_xmit(struct cyclades_port *info)
1387{
1388 struct cyclades_card *card = info->card;
1389 unsigned long flags;
1390 int channel = info->line - card->first_line;
1391
1392 if (!cy_is_Z(card)) {
1393 spin_lock_irqsave(&card->card_lock, flags);
1394 cyy_writeb(info, CyCAR, channel & 0x03);
1395 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy);
1396 spin_unlock_irqrestore(&card->card_lock, flags);
1397 } else {
1398#ifdef CONFIG_CYZ_INTR
1399 int retval;
1400
1401 spin_lock_irqsave(&card->card_lock, flags);
1402 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
1403 if (retval != 0) {
1404 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
1405 "%x\n", info->line, retval);
1406 }
1407 spin_unlock_irqrestore(&card->card_lock, flags);
1408#else /* CONFIG_CYZ_INTR */
1409 /* Don't have to do anything at this time */
1410#endif /* CONFIG_CYZ_INTR */
1411 }
1412} /* start_xmit */
1413
1414/*
1415 * This routine shuts down a serial port; interrupts are disabled,
1416 * and DTR is dropped if the hangup on close termio flag is on.
1417 */
1418static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty)
1419{
1420 struct cyclades_card *card;
1421 unsigned long flags;
1422
1423 if (!tty_port_initialized(&info->port))
1424 return;
1425
1426 card = info->card;
1427 if (!cy_is_Z(card)) {
1428 spin_lock_irqsave(&card->card_lock, flags);
1429
1430 /* Clear delta_msr_wait queue to avoid mem leaks. */
1431 wake_up_interruptible(&info->port.delta_msr_wait);
1432
1433 if (info->port.xmit_buf) {
1434 unsigned char *temp;
1435 temp = info->port.xmit_buf;
1436 info->port.xmit_buf = NULL;
1437 free_page((unsigned long)temp);
1438 }
1439 if (C_HUPCL(tty))
1440 cyy_change_rts_dtr(info, 0, TIOCM_RTS | TIOCM_DTR);
1441
1442 cyy_issue_cmd(info, CyCHAN_CTL | CyDIS_RCVR);
1443 /* it may be appropriate to clear _XMIT at
1444 some later date (after testing)!!! */
1445
1446 set_bit(TTY_IO_ERROR, &tty->flags);
1447 tty_port_set_initialized(&info->port, 0);
1448 spin_unlock_irqrestore(&card->card_lock, flags);
1449 } else {
1450#ifdef CY_DEBUG_OPEN
1451 int channel = info->line - card->first_line;
1452 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
1453 "base_addr %p\n", card, channel, card->base_addr);
1454#endif
1455
1456 if (!cyz_is_loaded(card))
1457 return;
1458
1459 spin_lock_irqsave(&card->card_lock, flags);
1460
1461 if (info->port.xmit_buf) {
1462 unsigned char *temp;
1463 temp = info->port.xmit_buf;
1464 info->port.xmit_buf = NULL;
1465 free_page((unsigned long)temp);
1466 }
1467
1468 if (C_HUPCL(tty))
1469 tty_port_lower_dtr_rts(&info->port);
1470
1471 set_bit(TTY_IO_ERROR, &tty->flags);
1472 tty_port_set_initialized(&info->port, 0);
1473
1474 spin_unlock_irqrestore(&card->card_lock, flags);
1475 }
1476
1477#ifdef CY_DEBUG_OPEN
1478 printk(KERN_DEBUG "cyc shutdown done\n");
1479#endif
1480} /* shutdown */
1481
1482/*
1483 * ------------------------------------------------------------
1484 * cy_open() and friends
1485 * ------------------------------------------------------------
1486 */
1487
1488/*
1489 * This routine is called whenever a serial port is opened. It
1490 * performs the serial-specific initialization for the tty structure.
1491 */
1492static int cy_open(struct tty_struct *tty, struct file *filp)
1493{
1494 struct cyclades_port *info;
1495 unsigned int i, line = tty->index;
1496 int retval;
1497
1498 for (i = 0; i < NR_CARDS; i++)
1499 if (line < cy_card[i].first_line + cy_card[i].nports &&
1500 line >= cy_card[i].first_line)
1501 break;
1502 if (i >= NR_CARDS)
1503 return -ENODEV;
1504 info = &cy_card[i].ports[line - cy_card[i].first_line];
1505 if (info->line < 0)
1506 return -ENODEV;
1507
1508 /* If the card's firmware hasn't been loaded,
1509 treat it as absent from the system. This
1510 will make the user pay attention.
1511 */
1512 if (cy_is_Z(info->card)) {
1513 struct cyclades_card *cinfo = info->card;
1514 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
1515
1516 if (!cyz_is_loaded(cinfo)) {
1517 if (cinfo->hw_ver == ZE_V1 && cyz_fpga_loaded(cinfo) &&
1518 readl(&firm_id->signature) ==
1519 ZFIRM_HLT) {
1520 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
1521 "need an external power supply for "
1522 "this number of ports.\nFirmware "
1523 "halted.\n");
1524 } else {
1525 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
1526 "yet loaded\n");
1527 }
1528 return -ENODEV;
1529 }
1530#ifdef CONFIG_CYZ_INTR
1531 else {
1532 /* In case this Z board is operating in interrupt mode, its
1533 interrupts should be enabled as soon as the first open
1534 happens to one of its ports. */
1535 if (!cinfo->intr_enabled) {
1536 u16 intr;
1537
1538 /* Enable interrupts on the PLX chip */
1539 intr = readw(&cinfo->ctl_addr.p9060->
1540 intr_ctrl_stat) | 0x0900;
1541 cy_writew(&cinfo->ctl_addr.p9060->
1542 intr_ctrl_stat, intr);
1543 /* Enable interrupts on the FW */
1544 retval = cyz_issue_cmd(cinfo, 0,
1545 C_CM_IRQ_ENBL, 0L);
1546 if (retval != 0) {
1547 printk(KERN_ERR "cyc:IRQ enable retval "
1548 "was %x\n", retval);
1549 }
1550 cinfo->intr_enabled = 1;
1551 }
1552 }
1553#endif /* CONFIG_CYZ_INTR */
1554 /* Make sure this Z port really exists in hardware */
1555 if (info->line > (cinfo->first_line + cinfo->nports - 1))
1556 return -ENODEV;
1557 }
1558#ifdef CY_DEBUG_OTHER
1559 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
1560#endif
1561 tty->driver_data = info;
1562 if (serial_paranoia_check(info, tty->name, "cy_open"))
1563 return -ENODEV;
1564
1565#ifdef CY_DEBUG_OPEN
1566 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
1567 info->port.count);
1568#endif
1569 info->port.count++;
1570#ifdef CY_DEBUG_COUNT
1571 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
1572 current->pid, info->port.count);
1573#endif
1574
1575 /*
1576 * Start up serial port
1577 */
1578 retval = cy_startup(info, tty);
1579 if (retval)
1580 return retval;
1581
1582 retval = tty_port_block_til_ready(&info->port, tty, filp);
1583 if (retval) {
1584#ifdef CY_DEBUG_OPEN
1585 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
1586 "with %d\n", retval);
1587#endif
1588 return retval;
1589 }
1590
1591 info->throttle = 0;
1592 tty_port_tty_set(&info->port, tty);
1593
1594#ifdef CY_DEBUG_OPEN
1595 printk(KERN_DEBUG "cyc:cy_open done\n");
1596#endif
1597 return 0;
1598} /* cy_open */
1599
1600/*
1601 * cy_wait_until_sent() --- wait until the transmitter is empty
1602 */
1603static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
1604{
1605 struct cyclades_card *card;
1606 struct cyclades_port *info = tty->driver_data;
1607 unsigned long orig_jiffies;
1608 int char_time;
1609
1610 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
1611 return;
1612
1613 if (info->xmit_fifo_size == 0)
1614 return; /* Just in case.... */
1615
1616 orig_jiffies = jiffies;
1617 /*
1618 * Set the check interval to be 1/5 of the estimated time to
1619 * send a single character, and make it at least 1. The check
1620 * interval should also be less than the timeout.
1621 *
1622 * Note: we have to use pretty tight timings here to satisfy
1623 * the NIST-PCTS.
1624 */
1625 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1626 char_time = char_time / 5;
1627 if (char_time <= 0)
1628 char_time = 1;
1629 if (timeout < 0)
1630 timeout = 0;
1631 if (timeout)
1632 char_time = min(char_time, timeout);
1633 /*
1634 * If the transmitter hasn't cleared in twice the approximate
1635 * amount of time to send the entire FIFO, it probably won't
1636 * ever clear. This assumes the UART isn't doing flow
1637 * control, which is currently the case. Hence, if it ever
1638 * takes longer than info->timeout, this is probably due to a
1639 * UART bug of some kind. So, we clamp the timeout parameter at
1640 * 2*info->timeout.
1641 */
1642 if (!timeout || timeout > 2 * info->timeout)
1643 timeout = 2 * info->timeout;
1644
1645 card = info->card;
1646 if (!cy_is_Z(card)) {
1647 while (cyy_readb(info, CySRER) & CyTxRdy) {
1648 if (msleep_interruptible(jiffies_to_msecs(char_time)))
1649 break;
1650 if (timeout && time_after(jiffies, orig_jiffies +
1651 timeout))
1652 break;
1653 }
1654 }
1655 /* Run one more char cycle */
1656 msleep_interruptible(jiffies_to_msecs(char_time * 5));
1657}
1658
1659static void cy_flush_buffer(struct tty_struct *tty)
1660{
1661 struct cyclades_port *info = tty->driver_data;
1662 struct cyclades_card *card;
1663 int channel, retval;
1664 unsigned long flags;
1665
1666#ifdef CY_DEBUG_IO
1667 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
1668#endif
1669
1670 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
1671 return;
1672
1673 card = info->card;
1674 channel = info->line - card->first_line;
1675
1676 spin_lock_irqsave(&card->card_lock, flags);
1677 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1678 spin_unlock_irqrestore(&card->card_lock, flags);
1679
1680 if (cy_is_Z(card)) { /* If it is a Z card, flush the on-board
1681 buffers as well */
1682 spin_lock_irqsave(&card->card_lock, flags);
1683 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
1684 if (retval != 0) {
1685 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
1686 "was %x\n", info->line, retval);
1687 }
1688 spin_unlock_irqrestore(&card->card_lock, flags);
1689 }
1690 tty_wakeup(tty);
1691} /* cy_flush_buffer */
1692
1693
1694static void cy_do_close(struct tty_port *port)
1695{
1696 struct cyclades_port *info = container_of(port, struct cyclades_port,
1697 port);
1698 struct cyclades_card *card;
1699 unsigned long flags;
1700 int channel;
1701
1702 card = info->card;
1703 channel = info->line - card->first_line;
1704 spin_lock_irqsave(&card->card_lock, flags);
1705
1706 if (!cy_is_Z(card)) {
1707 /* Stop accepting input */
1708 cyy_writeb(info, CyCAR, channel & 0x03);
1709 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyRxData);
1710 if (tty_port_initialized(&info->port)) {
1711 /* Waiting for on-board buffers to be empty before
1712 closing the port */
1713 spin_unlock_irqrestore(&card->card_lock, flags);
1714 cy_wait_until_sent(port->tty, info->timeout);
1715 spin_lock_irqsave(&card->card_lock, flags);
1716 }
1717 } else {
1718#ifdef Z_WAKE
1719 /* Waiting for on-board buffers to be empty before closing
1720 the port */
1721 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
1722 int retval;
1723
1724 if (readl(&ch_ctrl->flow_status) != C_FS_TXIDLE) {
1725 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
1726 if (retval != 0) {
1727 printk(KERN_DEBUG "cyc:cy_close retval on "
1728 "ttyC%d was %x\n", info->line, retval);
1729 }
1730 spin_unlock_irqrestore(&card->card_lock, flags);
1731 wait_for_completion_interruptible(&info->shutdown_wait);
1732 spin_lock_irqsave(&card->card_lock, flags);
1733 }
1734#endif
1735 }
1736 spin_unlock_irqrestore(&card->card_lock, flags);
1737 cy_shutdown(info, port->tty);
1738}
1739
1740/*
1741 * This routine is called when a particular tty device is closed.
1742 */
1743static void cy_close(struct tty_struct *tty, struct file *filp)
1744{
1745 struct cyclades_port *info = tty->driver_data;
1746 if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
1747 return;
1748 tty_port_close(&info->port, tty, filp);
1749} /* cy_close */
1750
1751/* This routine gets called when tty_write has put something into
1752 * the write_queue. The characters may come from user space or
1753 * kernel space.
1754 *
1755 * This routine will return the number of characters actually
1756 * accepted for writing.
1757 *
1758 * If the port is not already transmitting stuff, start it off by
1759 * enabling interrupts. The interrupt service routine will then
1760 * ensure that the characters are sent.
1761 * If the port is already active, there is no need to kick it.
1762 *
1763 */
1764static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
1765{
1766 struct cyclades_port *info = tty->driver_data;
1767 unsigned long flags;
1768 int c, ret = 0;
1769
1770#ifdef CY_DEBUG_IO
1771 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
1772#endif
1773
1774 if (serial_paranoia_check(info, tty->name, "cy_write"))
1775 return 0;
1776
1777 if (!info->port.xmit_buf)
1778 return 0;
1779
1780 spin_lock_irqsave(&info->card->card_lock, flags);
1781 while (1) {
1782 c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
1783 c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
1784
1785 if (c <= 0)
1786 break;
1787
1788 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
1789 info->xmit_head = (info->xmit_head + c) &
1790 (SERIAL_XMIT_SIZE - 1);
1791 info->xmit_cnt += c;
1792 buf += c;
1793 count -= c;
1794 ret += c;
1795 }
1796 spin_unlock_irqrestore(&info->card->card_lock, flags);
1797
1798 info->idle_stats.xmit_bytes += ret;
1799 info->idle_stats.xmit_idle = jiffies;
1800
1801 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
1802 start_xmit(info);
1803
1804 return ret;
1805} /* cy_write */
1806
1807/*
1808 * This routine is called by the kernel to write a single
1809 * character to the tty device. If the kernel uses this routine,
1810 * it must call the flush_chars() routine (if defined) when it is
1811 * done stuffing characters into the driver. If there is no room
1812 * in the queue, the character is ignored.
1813 */
1814static int cy_put_char(struct tty_struct *tty, unsigned char ch)
1815{
1816 struct cyclades_port *info = tty->driver_data;
1817 unsigned long flags;
1818
1819#ifdef CY_DEBUG_IO
1820 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
1821#endif
1822
1823 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
1824 return 0;
1825
1826 if (!info->port.xmit_buf)
1827 return 0;
1828
1829 spin_lock_irqsave(&info->card->card_lock, flags);
1830 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
1831 spin_unlock_irqrestore(&info->card->card_lock, flags);
1832 return 0;
1833 }
1834
1835 info->port.xmit_buf[info->xmit_head++] = ch;
1836 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1837 info->xmit_cnt++;
1838 info->idle_stats.xmit_bytes++;
1839 info->idle_stats.xmit_idle = jiffies;
1840 spin_unlock_irqrestore(&info->card->card_lock, flags);
1841 return 1;
1842} /* cy_put_char */
1843
1844/*
1845 * This routine is called by the kernel after it has written a
1846 * series of characters to the tty device using put_char().
1847 */
1848static void cy_flush_chars(struct tty_struct *tty)
1849{
1850 struct cyclades_port *info = tty->driver_data;
1851
1852#ifdef CY_DEBUG_IO
1853 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
1854#endif
1855
1856 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
1857 return;
1858
1859 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1860 !info->port.xmit_buf)
1861 return;
1862
1863 start_xmit(info);
1864} /* cy_flush_chars */
1865
1866/*
1867 * This routine returns the numbers of characters the tty driver
1868 * will accept for queuing to be written. This number is subject
1869 * to change as output buffers get emptied, or if the output flow
1870 * control is activated.
1871 */
1872static int cy_write_room(struct tty_struct *tty)
1873{
1874 struct cyclades_port *info = tty->driver_data;
1875 int ret;
1876
1877#ifdef CY_DEBUG_IO
1878 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
1879#endif
1880
1881 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
1882 return 0;
1883 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1884 if (ret < 0)
1885 ret = 0;
1886 return ret;
1887} /* cy_write_room */
1888
1889static int cy_chars_in_buffer(struct tty_struct *tty)
1890{
1891 struct cyclades_port *info = tty->driver_data;
1892
1893 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
1894 return 0;
1895
1896#ifdef Z_EXT_CHARS_IN_BUFFER
1897 if (!cy_is_Z(info->card)) {
1898#endif /* Z_EXT_CHARS_IN_BUFFER */
1899#ifdef CY_DEBUG_IO
1900 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
1901 info->line, info->xmit_cnt);
1902#endif
1903 return info->xmit_cnt;
1904#ifdef Z_EXT_CHARS_IN_BUFFER
1905 } else {
1906 struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
1907 int char_count;
1908 __u32 tx_put, tx_get, tx_bufsize;
1909
1910 tx_get = readl(&buf_ctrl->tx_get);
1911 tx_put = readl(&buf_ctrl->tx_put);
1912 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1913 if (tx_put >= tx_get)
1914 char_count = tx_put - tx_get;
1915 else
1916 char_count = tx_put - tx_get + tx_bufsize;
1917#ifdef CY_DEBUG_IO
1918 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
1919 info->line, info->xmit_cnt + char_count);
1920#endif
1921 return info->xmit_cnt + char_count;
1922 }
1923#endif /* Z_EXT_CHARS_IN_BUFFER */
1924} /* cy_chars_in_buffer */
1925
1926/*
1927 * ------------------------------------------------------------
1928 * cy_ioctl() and friends
1929 * ------------------------------------------------------------
1930 */
1931
1932static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
1933{
1934 int co, co_val, bpr;
1935 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
1936 25000000);
1937
1938 if (baud == 0) {
1939 info->tbpr = info->tco = info->rbpr = info->rco = 0;
1940 return;
1941 }
1942
1943 /* determine which prescaler to use */
1944 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
1945 if (cy_clock / co_val / baud > 63)
1946 break;
1947 }
1948
1949 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
1950 if (bpr > 255)
1951 bpr = 255;
1952
1953 info->tbpr = info->rbpr = bpr;
1954 info->tco = info->rco = co;
1955}
1956
1957/*
1958 * This routine finds or computes the various line characteristics.
1959 * It used to be called config_setup
1960 */
1961static void cy_set_line_char(struct cyclades_port *info, struct tty_struct *tty)
1962{
1963 struct cyclades_card *card;
1964 unsigned long flags;
1965 int channel;
1966 unsigned cflag, iflag;
1967 int baud, baud_rate = 0;
1968 int i;
1969
1970 if (info->line == -1)
1971 return;
1972
1973 cflag = tty->termios.c_cflag;
1974 iflag = tty->termios.c_iflag;
1975
1976 card = info->card;
1977 channel = info->line - card->first_line;
1978
1979 if (!cy_is_Z(card)) {
1980 u32 cflags;
1981
1982 /* baud rate */
1983 baud = tty_get_baud_rate(tty);
1984 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
1985 ASYNC_SPD_CUST) {
1986 if (info->custom_divisor)
1987 baud_rate = info->baud / info->custom_divisor;
1988 else
1989 baud_rate = info->baud;
1990 } else if (baud > CD1400_MAX_SPEED) {
1991 baud = CD1400_MAX_SPEED;
1992 }
1993 /* find the baud index */
1994 for (i = 0; i < 20; i++) {
1995 if (baud == baud_table[i])
1996 break;
1997 }
1998 if (i == 20)
1999 i = 19; /* CD1400_MAX_SPEED */
2000
2001 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
2002 ASYNC_SPD_CUST) {
2003 cyy_baud_calc(info, baud_rate);
2004 } else {
2005 if (info->chip_rev >= CD1400_REV_J) {
2006 /* It is a CD1400 rev. J or later */
2007 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
2008 info->tco = baud_co_60[i]; /* Tx CO */
2009 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
2010 info->rco = baud_co_60[i]; /* Rx CO */
2011 } else {
2012 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
2013 info->tco = baud_co_25[i]; /* Tx CO */
2014 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
2015 info->rco = baud_co_25[i]; /* Rx CO */
2016 }
2017 }
2018 if (baud_table[i] == 134) {
2019 /* get it right for 134.5 baud */
2020 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
2021 2;
2022 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
2023 ASYNC_SPD_CUST) {
2024 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2025 baud_rate) + 2;
2026 } else if (baud_table[i]) {
2027 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2028 baud_table[i]) + 2;
2029 /* this needs to be propagated into the card info */
2030 } else {
2031 info->timeout = 0;
2032 }
2033 /* By tradition (is it a standard?) a baud rate of zero
2034 implies the line should be/has been closed. A bit
2035 later in this routine such a test is performed. */
2036
2037 /* byte size and parity */
2038 info->cor5 = 0;
2039 info->cor4 = 0;
2040 /* receive threshold */
2041 info->cor3 = (info->default_threshold ?
2042 info->default_threshold : baud_cor3[i]);
2043 info->cor2 = CyETC;
2044 switch (cflag & CSIZE) {
2045 case CS5:
2046 info->cor1 = Cy_5_BITS;
2047 break;
2048 case CS6:
2049 info->cor1 = Cy_6_BITS;
2050 break;
2051 case CS7:
2052 info->cor1 = Cy_7_BITS;
2053 break;
2054 case CS8:
2055 info->cor1 = Cy_8_BITS;
2056 break;
2057 }
2058 if (cflag & CSTOPB)
2059 info->cor1 |= Cy_2_STOP;
2060
2061 if (cflag & PARENB) {
2062 if (cflag & PARODD)
2063 info->cor1 |= CyPARITY_O;
2064 else
2065 info->cor1 |= CyPARITY_E;
2066 } else
2067 info->cor1 |= CyPARITY_NONE;
2068
2069 /* CTS flow control flag */
2070 tty_port_set_cts_flow(&info->port, cflag & CRTSCTS);
2071 if (cflag & CRTSCTS)
2072 info->cor2 |= CyCtsAE;
2073 else
2074 info->cor2 &= ~CyCtsAE;
2075 tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL);
2076
2077 /***********************************************
2078 The hardware option, CyRtsAO, presents RTS when
2079 the chip has characters to send. Since most modems
2080 use RTS as reverse (inbound) flow control, this
2081 option is not used. If inbound flow control is
2082 necessary, DTR can be programmed to provide the
2083 appropriate signals for use with a non-standard
2084 cable. Contact Marcio Saito for details.
2085 ***********************************************/
2086
2087 channel &= 0x03;
2088
2089 spin_lock_irqsave(&card->card_lock, flags);
2090 cyy_writeb(info, CyCAR, channel);
2091
2092 /* tx and rx baud rate */
2093
2094 cyy_writeb(info, CyTCOR, info->tco);
2095 cyy_writeb(info, CyTBPR, info->tbpr);
2096 cyy_writeb(info, CyRCOR, info->rco);
2097 cyy_writeb(info, CyRBPR, info->rbpr);
2098
2099 /* set line characteristics according configuration */
2100
2101 cyy_writeb(info, CySCHR1, START_CHAR(tty));
2102 cyy_writeb(info, CySCHR2, STOP_CHAR(tty));
2103 cyy_writeb(info, CyCOR1, info->cor1);
2104 cyy_writeb(info, CyCOR2, info->cor2);
2105 cyy_writeb(info, CyCOR3, info->cor3);
2106 cyy_writeb(info, CyCOR4, info->cor4);
2107 cyy_writeb(info, CyCOR5, info->cor5);
2108
2109 cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
2110 CyCOR3ch);
2111
2112 /* !!! Is this needed? */
2113 cyy_writeb(info, CyCAR, channel);
2114 cyy_writeb(info, CyRTPR,
2115 (info->default_timeout ? info->default_timeout : 0x02));
2116 /* 10ms rx timeout */
2117
2118 cflags = CyCTS;
2119 if (!C_CLOCAL(tty))
2120 cflags |= CyDSR | CyRI | CyDCD;
2121 /* without modem intr */
2122 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyMdmCh);
2123 /* act on 1->0 modem transitions */
2124 if ((cflag & CRTSCTS) && info->rflow)
2125 cyy_writeb(info, CyMCOR1, cflags | rflow_thr[i]);
2126 else
2127 cyy_writeb(info, CyMCOR1, cflags);
2128 /* act on 0->1 modem transitions */
2129 cyy_writeb(info, CyMCOR2, cflags);
2130
2131 if (i == 0) /* baud rate is zero, turn off line */
2132 cyy_change_rts_dtr(info, 0, TIOCM_DTR);
2133 else
2134 cyy_change_rts_dtr(info, TIOCM_DTR, 0);
2135
2136 clear_bit(TTY_IO_ERROR, &tty->flags);
2137 spin_unlock_irqrestore(&card->card_lock, flags);
2138
2139 } else {
2140 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
2141 __u32 sw_flow;
2142 int retval;
2143
2144 if (!cyz_is_loaded(card))
2145 return;
2146
2147 /* baud rate */
2148 baud = tty_get_baud_rate(tty);
2149 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
2150 ASYNC_SPD_CUST) {
2151 if (info->custom_divisor)
2152 baud_rate = info->baud / info->custom_divisor;
2153 else
2154 baud_rate = info->baud;
2155 } else if (baud > CYZ_MAX_SPEED) {
2156 baud = CYZ_MAX_SPEED;
2157 }
2158 cy_writel(&ch_ctrl->comm_baud, baud);
2159
2160 if (baud == 134) {
2161 /* get it right for 134.5 baud */
2162 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
2163 2;
2164 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
2165 ASYNC_SPD_CUST) {
2166 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2167 baud_rate) + 2;
2168 } else if (baud) {
2169 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2170 baud) + 2;
2171 /* this needs to be propagated into the card info */
2172 } else {
2173 info->timeout = 0;
2174 }
2175
2176 /* byte size and parity */
2177 switch (cflag & CSIZE) {
2178 case CS5:
2179 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
2180 break;
2181 case CS6:
2182 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
2183 break;
2184 case CS7:
2185 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
2186 break;
2187 case CS8:
2188 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
2189 break;
2190 }
2191 if (cflag & CSTOPB) {
2192 cy_writel(&ch_ctrl->comm_data_l,
2193 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
2194 } else {
2195 cy_writel(&ch_ctrl->comm_data_l,
2196 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
2197 }
2198 if (cflag & PARENB) {
2199 if (cflag & PARODD)
2200 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
2201 else
2202 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
2203 } else
2204 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
2205
2206 /* CTS flow control flag */
2207 if (cflag & CRTSCTS) {
2208 cy_writel(&ch_ctrl->hw_flow,
2209 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
2210 } else {
2211 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
2212 ~(C_RS_CTS | C_RS_RTS));
2213 }
2214 /* As the HW flow control is done in firmware, the driver
2215 doesn't need to care about it */
2216 tty_port_set_cts_flow(&info->port, 0);
2217
2218 /* XON/XOFF/XANY flow control flags */
2219 sw_flow = 0;
2220 if (iflag & IXON) {
2221 sw_flow |= C_FL_OXX;
2222 if (iflag & IXANY)
2223 sw_flow |= C_FL_OIXANY;
2224 }
2225 cy_writel(&ch_ctrl->sw_flow, sw_flow);
2226
2227 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
2228 if (retval != 0) {
2229 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
2230 "was %x\n", info->line, retval);
2231 }
2232
2233 /* CD sensitivity */
2234 tty_port_set_check_carrier(&info->port, ~cflag & CLOCAL);
2235
2236 if (baud == 0) { /* baud rate is zero, turn off line */
2237 cy_writel(&ch_ctrl->rs_control,
2238 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
2239#ifdef CY_DEBUG_DTR
2240 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
2241#endif
2242 } else {
2243 cy_writel(&ch_ctrl->rs_control,
2244 readl(&ch_ctrl->rs_control) | C_RS_DTR);
2245#ifdef CY_DEBUG_DTR
2246 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
2247#endif
2248 }
2249
2250 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
2251 if (retval != 0) {
2252 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
2253 "was %x\n", info->line, retval);
2254 }
2255
2256 clear_bit(TTY_IO_ERROR, &tty->flags);
2257 }
2258} /* set_line_char */
2259
2260static int cy_get_serial_info(struct tty_struct *tty,
2261 struct serial_struct *ss)
2262{
2263 struct cyclades_port *info = tty->driver_data;
2264 struct cyclades_card *cinfo = info->card;
2265
2266 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
2267 return -ENODEV;
2268 ss->type = info->type;
2269 ss->line = info->line;
2270 ss->port = (info->card - cy_card) * 0x100 + info->line -
2271 cinfo->first_line;
2272 ss->irq = cinfo->irq;
2273 ss->flags = info->port.flags;
2274 ss->close_delay = info->port.close_delay;
2275 ss->closing_wait = info->port.closing_wait;
2276 ss->baud_base = info->baud;
2277 ss->custom_divisor = info->custom_divisor;
2278 return 0;
2279}
2280
2281static int cy_set_serial_info(struct tty_struct *tty,
2282 struct serial_struct *ss)
2283{
2284 struct cyclades_port *info = tty->driver_data;
2285 int old_flags;
2286 int ret;
2287
2288 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
2289 return -ENODEV;
2290
2291 mutex_lock(&info->port.mutex);
2292
2293 old_flags = info->port.flags;
2294
2295 if (!capable(CAP_SYS_ADMIN)) {
2296 if (ss->close_delay != info->port.close_delay ||
2297 ss->baud_base != info->baud ||
2298 (ss->flags & ASYNC_FLAGS &
2299 ~ASYNC_USR_MASK) !=
2300 (info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
2301 {
2302 mutex_unlock(&info->port.mutex);
2303 return -EPERM;
2304 }
2305 info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) |
2306 (ss->flags & ASYNC_USR_MASK);
2307 info->baud = ss->baud_base;
2308 info->custom_divisor = ss->custom_divisor;
2309 goto check_and_exit;
2310 }
2311
2312 /*
2313 * OK, past this point, all the error checking has been done.
2314 * At this point, we start making changes.....
2315 */
2316
2317 info->baud = ss->baud_base;
2318 info->custom_divisor = ss->custom_divisor;
2319 info->port.flags = (info->port.flags & ~ASYNC_FLAGS) |
2320 (ss->flags & ASYNC_FLAGS);
2321 info->port.close_delay = ss->close_delay * HZ / 100;
2322 info->port.closing_wait = ss->closing_wait * HZ / 100;
2323
2324check_and_exit:
2325 if (tty_port_initialized(&info->port)) {
2326 if ((ss->flags ^ old_flags) & ASYNC_SPD_MASK) {
2327 /* warn about deprecation unless clearing */
2328 if (ss->flags & ASYNC_SPD_MASK)
2329 dev_warn_ratelimited(tty->dev, "use of SPD flags is deprecated\n");
2330 }
2331 cy_set_line_char(info, tty);
2332 ret = 0;
2333 } else {
2334 ret = cy_startup(info, tty);
2335 }
2336 mutex_unlock(&info->port.mutex);
2337 return ret;
2338} /* set_serial_info */
2339
2340/*
2341 * get_lsr_info - get line status register info
2342 *
2343 * Purpose: Let user call ioctl() to get info when the UART physically
2344 * is emptied. On bus types like RS485, the transmitter must
2345 * release the bus after transmitting. This must be done when
2346 * the transmit shift register is empty, not be done when the
2347 * transmit holding register is empty. This functionality
2348 * allows an RS485 driver to be written in user space.
2349 */
2350static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
2351{
2352 struct cyclades_card *card = info->card;
2353 unsigned int result;
2354 unsigned long flags;
2355 u8 status;
2356
2357 if (!cy_is_Z(card)) {
2358 spin_lock_irqsave(&card->card_lock, flags);
2359 status = cyy_readb(info, CySRER) & (CyTxRdy | CyTxMpty);
2360 spin_unlock_irqrestore(&card->card_lock, flags);
2361 result = (status ? 0 : TIOCSER_TEMT);
2362 } else {
2363 /* Not supported yet */
2364 return -EINVAL;
2365 }
2366 return put_user(result, value);
2367}
2368
2369static int cy_tiocmget(struct tty_struct *tty)
2370{
2371 struct cyclades_port *info = tty->driver_data;
2372 struct cyclades_card *card;
2373 int result;
2374
2375 if (serial_paranoia_check(info, tty->name, __func__))
2376 return -ENODEV;
2377
2378 card = info->card;
2379
2380 if (!cy_is_Z(card)) {
2381 unsigned long flags;
2382 int channel = info->line - card->first_line;
2383 u8 status;
2384
2385 spin_lock_irqsave(&card->card_lock, flags);
2386 cyy_writeb(info, CyCAR, channel & 0x03);
2387 status = cyy_readb(info, CyMSVR1);
2388 status |= cyy_readb(info, CyMSVR2);
2389 spin_unlock_irqrestore(&card->card_lock, flags);
2390
2391 if (info->rtsdtr_inv) {
2392 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
2393 ((status & CyDTR) ? TIOCM_RTS : 0);
2394 } else {
2395 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
2396 ((status & CyDTR) ? TIOCM_DTR : 0);
2397 }
2398 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
2399 ((status & CyRI) ? TIOCM_RNG : 0) |
2400 ((status & CyDSR) ? TIOCM_DSR : 0) |
2401 ((status & CyCTS) ? TIOCM_CTS : 0);
2402 } else {
2403 u32 lstatus;
2404
2405 if (!cyz_is_loaded(card)) {
2406 result = -ENODEV;
2407 goto end;
2408 }
2409
2410 lstatus = readl(&info->u.cyz.ch_ctrl->rs_status);
2411 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
2412 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
2413 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
2414 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
2415 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
2416 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
2417 }
2418end:
2419 return result;
2420} /* cy_tiomget */
2421
2422static int
2423cy_tiocmset(struct tty_struct *tty,
2424 unsigned int set, unsigned int clear)
2425{
2426 struct cyclades_port *info = tty->driver_data;
2427 struct cyclades_card *card;
2428 unsigned long flags;
2429
2430 if (serial_paranoia_check(info, tty->name, __func__))
2431 return -ENODEV;
2432
2433 card = info->card;
2434 if (!cy_is_Z(card)) {
2435 spin_lock_irqsave(&card->card_lock, flags);
2436 cyy_change_rts_dtr(info, set, clear);
2437 spin_unlock_irqrestore(&card->card_lock, flags);
2438 } else {
2439 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
2440 int retval, channel = info->line - card->first_line;
2441 u32 rs;
2442
2443 if (!cyz_is_loaded(card))
2444 return -ENODEV;
2445
2446 spin_lock_irqsave(&card->card_lock, flags);
2447 rs = readl(&ch_ctrl->rs_control);
2448 if (set & TIOCM_RTS)
2449 rs |= C_RS_RTS;
2450 if (clear & TIOCM_RTS)
2451 rs &= ~C_RS_RTS;
2452 if (set & TIOCM_DTR) {
2453 rs |= C_RS_DTR;
2454#ifdef CY_DEBUG_DTR
2455 printk(KERN_DEBUG "cyc:set_modem_info raising Z DTR\n");
2456#endif
2457 }
2458 if (clear & TIOCM_DTR) {
2459 rs &= ~C_RS_DTR;
2460#ifdef CY_DEBUG_DTR
2461 printk(KERN_DEBUG "cyc:set_modem_info clearing "
2462 "Z DTR\n");
2463#endif
2464 }
2465 cy_writel(&ch_ctrl->rs_control, rs);
2466 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
2467 spin_unlock_irqrestore(&card->card_lock, flags);
2468 if (retval != 0) {
2469 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
2470 "was %x\n", info->line, retval);
2471 }
2472 }
2473 return 0;
2474}
2475
2476/*
2477 * cy_break() --- routine which turns the break handling on or off
2478 */
2479static int cy_break(struct tty_struct *tty, int break_state)
2480{
2481 struct cyclades_port *info = tty->driver_data;
2482 struct cyclades_card *card;
2483 unsigned long flags;
2484 int retval = 0;
2485
2486 if (serial_paranoia_check(info, tty->name, "cy_break"))
2487 return -EINVAL;
2488
2489 card = info->card;
2490
2491 spin_lock_irqsave(&card->card_lock, flags);
2492 if (!cy_is_Z(card)) {
2493 /* Let the transmit ISR take care of this (since it
2494 requires stuffing characters into the output stream).
2495 */
2496 if (break_state == -1) {
2497 if (!info->breakon) {
2498 info->breakon = 1;
2499 if (!info->xmit_cnt) {
2500 spin_unlock_irqrestore(&card->card_lock, flags);
2501 start_xmit(info);
2502 spin_lock_irqsave(&card->card_lock, flags);
2503 }
2504 }
2505 } else {
2506 if (!info->breakoff) {
2507 info->breakoff = 1;
2508 if (!info->xmit_cnt) {
2509 spin_unlock_irqrestore(&card->card_lock, flags);
2510 start_xmit(info);
2511 spin_lock_irqsave(&card->card_lock, flags);
2512 }
2513 }
2514 }
2515 } else {
2516 if (break_state == -1) {
2517 retval = cyz_issue_cmd(card,
2518 info->line - card->first_line,
2519 C_CM_SET_BREAK, 0L);
2520 if (retval != 0) {
2521 printk(KERN_ERR "cyc:cy_break (set) retval on "
2522 "ttyC%d was %x\n", info->line, retval);
2523 }
2524 } else {
2525 retval = cyz_issue_cmd(card,
2526 info->line - card->first_line,
2527 C_CM_CLR_BREAK, 0L);
2528 if (retval != 0) {
2529 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
2530 "on ttyC%d was %x\n", info->line,
2531 retval);
2532 }
2533 }
2534 }
2535 spin_unlock_irqrestore(&card->card_lock, flags);
2536 return retval;
2537} /* cy_break */
2538
2539static int set_threshold(struct cyclades_port *info, unsigned long value)
2540{
2541 struct cyclades_card *card = info->card;
2542 unsigned long flags;
2543
2544 if (!cy_is_Z(card)) {
2545 info->cor3 &= ~CyREC_FIFO;
2546 info->cor3 |= value & CyREC_FIFO;
2547
2548 spin_lock_irqsave(&card->card_lock, flags);
2549 cyy_writeb(info, CyCOR3, info->cor3);
2550 cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR3ch);
2551 spin_unlock_irqrestore(&card->card_lock, flags);
2552 }
2553 return 0;
2554} /* set_threshold */
2555
2556static int get_threshold(struct cyclades_port *info,
2557 unsigned long __user *value)
2558{
2559 struct cyclades_card *card = info->card;
2560
2561 if (!cy_is_Z(card)) {
2562 u8 tmp = cyy_readb(info, CyCOR3) & CyREC_FIFO;
2563 return put_user(tmp, value);
2564 }
2565 return 0;
2566} /* get_threshold */
2567
2568static int set_timeout(struct cyclades_port *info, unsigned long value)
2569{
2570 struct cyclades_card *card = info->card;
2571 unsigned long flags;
2572
2573 if (!cy_is_Z(card)) {
2574 spin_lock_irqsave(&card->card_lock, flags);
2575 cyy_writeb(info, CyRTPR, value & 0xff);
2576 spin_unlock_irqrestore(&card->card_lock, flags);
2577 }
2578 return 0;
2579} /* set_timeout */
2580
2581static int get_timeout(struct cyclades_port *info,
2582 unsigned long __user *value)
2583{
2584 struct cyclades_card *card = info->card;
2585
2586 if (!cy_is_Z(card)) {
2587 u8 tmp = cyy_readb(info, CyRTPR);
2588 return put_user(tmp, value);
2589 }
2590 return 0;
2591} /* get_timeout */
2592
2593static int cy_cflags_changed(struct cyclades_port *info, unsigned long arg,
2594 struct cyclades_icount *cprev)
2595{
2596 struct cyclades_icount cnow;
2597 unsigned long flags;
2598 int ret;
2599
2600 spin_lock_irqsave(&info->card->card_lock, flags);
2601 cnow = info->icount; /* atomic copy */
2602 spin_unlock_irqrestore(&info->card->card_lock, flags);
2603
2604 ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
2605 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
2606 ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
2607 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
2608
2609 *cprev = cnow;
2610
2611 return ret;
2612}
2613
2614/*
2615 * This routine allows the tty driver to implement device-
2616 * specific ioctl's. If the ioctl number passed in cmd is
2617 * not recognized by the driver, it should return ENOIOCTLCMD.
2618 */
2619static int
2620cy_ioctl(struct tty_struct *tty,
2621 unsigned int cmd, unsigned long arg)
2622{
2623 struct cyclades_port *info = tty->driver_data;
2624 struct cyclades_icount cnow; /* kernel counter temps */
2625 int ret_val = 0;
2626 unsigned long flags;
2627 void __user *argp = (void __user *)arg;
2628
2629 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
2630 return -ENODEV;
2631
2632#ifdef CY_DEBUG_OTHER
2633 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
2634 info->line, cmd, arg);
2635#endif
2636
2637 switch (cmd) {
2638 case CYGETMON:
2639 if (copy_to_user(argp, &info->mon, sizeof(info->mon))) {
2640 ret_val = -EFAULT;
2641 break;
2642 }
2643 memset(&info->mon, 0, sizeof(info->mon));
2644 break;
2645 case CYGETTHRESH:
2646 ret_val = get_threshold(info, argp);
2647 break;
2648 case CYSETTHRESH:
2649 ret_val = set_threshold(info, arg);
2650 break;
2651 case CYGETDEFTHRESH:
2652 ret_val = put_user(info->default_threshold,
2653 (unsigned long __user *)argp);
2654 break;
2655 case CYSETDEFTHRESH:
2656 info->default_threshold = arg & 0x0f;
2657 break;
2658 case CYGETTIMEOUT:
2659 ret_val = get_timeout(info, argp);
2660 break;
2661 case CYSETTIMEOUT:
2662 ret_val = set_timeout(info, arg);
2663 break;
2664 case CYGETDEFTIMEOUT:
2665 ret_val = put_user(info->default_timeout,
2666 (unsigned long __user *)argp);
2667 break;
2668 case CYSETDEFTIMEOUT:
2669 info->default_timeout = arg & 0xff;
2670 break;
2671 case CYSETRFLOW:
2672 info->rflow = (int)arg;
2673 break;
2674 case CYGETRFLOW:
2675 ret_val = info->rflow;
2676 break;
2677 case CYSETRTSDTR_INV:
2678 info->rtsdtr_inv = (int)arg;
2679 break;
2680 case CYGETRTSDTR_INV:
2681 ret_val = info->rtsdtr_inv;
2682 break;
2683 case CYGETCD1400VER:
2684 ret_val = info->chip_rev;
2685 break;
2686#ifndef CONFIG_CYZ_INTR
2687 case CYZSETPOLLCYCLE:
2688 if (arg > LONG_MAX / HZ)
2689 return -ENODEV;
2690 cyz_polling_cycle = (arg * HZ) / 1000;
2691 break;
2692 case CYZGETPOLLCYCLE:
2693 ret_val = (cyz_polling_cycle * 1000) / HZ;
2694 break;
2695#endif /* CONFIG_CYZ_INTR */
2696 case CYSETWAIT:
2697 info->port.closing_wait = (unsigned short)arg * HZ / 100;
2698 break;
2699 case CYGETWAIT:
2700 ret_val = info->port.closing_wait / (HZ / 100);
2701 break;
2702 case TIOCSERGETLSR: /* Get line status register */
2703 ret_val = get_lsr_info(info, argp);
2704 break;
2705 /*
2706 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
2707 * - mask passed in arg for lines of interest
2708 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
2709 * Caller should use TIOCGICOUNT to see which one it was
2710 */
2711 case TIOCMIWAIT:
2712 spin_lock_irqsave(&info->card->card_lock, flags);
2713 /* note the counters on entry */
2714 cnow = info->icount;
2715 spin_unlock_irqrestore(&info->card->card_lock, flags);
2716 ret_val = wait_event_interruptible(info->port.delta_msr_wait,
2717 cy_cflags_changed(info, arg, &cnow));
2718 break;
2719
2720 /*
2721 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
2722 * Return: write counters to the user passed counter struct
2723 * NB: both 1->0 and 0->1 transitions are counted except for
2724 * RI where only 0->1 is counted.
2725 */
2726 default:
2727 ret_val = -ENOIOCTLCMD;
2728 }
2729
2730#ifdef CY_DEBUG_OTHER
2731 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
2732#endif
2733 return ret_val;
2734} /* cy_ioctl */
2735
2736static int cy_get_icount(struct tty_struct *tty,
2737 struct serial_icounter_struct *sic)
2738{
2739 struct cyclades_port *info = tty->driver_data;
2740 struct cyclades_icount cnow; /* Used to snapshot */
2741 unsigned long flags;
2742
2743 spin_lock_irqsave(&info->card->card_lock, flags);
2744 cnow = info->icount;
2745 spin_unlock_irqrestore(&info->card->card_lock, flags);
2746
2747 sic->cts = cnow.cts;
2748 sic->dsr = cnow.dsr;
2749 sic->rng = cnow.rng;
2750 sic->dcd = cnow.dcd;
2751 sic->rx = cnow.rx;
2752 sic->tx = cnow.tx;
2753 sic->frame = cnow.frame;
2754 sic->overrun = cnow.overrun;
2755 sic->parity = cnow.parity;
2756 sic->brk = cnow.brk;
2757 sic->buf_overrun = cnow.buf_overrun;
2758 return 0;
2759}
2760
2761/*
2762 * This routine allows the tty driver to be notified when
2763 * device's termios settings have changed. Note that a
2764 * well-designed tty driver should be prepared to accept the case
2765 * where old == NULL, and try to do something rational.
2766 */
2767static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
2768{
2769 struct cyclades_port *info = tty->driver_data;
2770
2771#ifdef CY_DEBUG_OTHER
2772 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
2773#endif
2774
2775 cy_set_line_char(info, tty);
2776
2777 if ((old_termios->c_cflag & CRTSCTS) && !C_CRTSCTS(tty)) {
2778 tty->hw_stopped = 0;
2779 cy_start(tty);
2780 }
2781#if 0
2782 /*
2783 * No need to wake up processes in open wait, since they
2784 * sample the CLOCAL flag once, and don't recheck it.
2785 * XXX It's not clear whether the current behavior is correct
2786 * or not. Hence, this may change.....
2787 */
2788 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
2789 wake_up_interruptible(&info->port.open_wait);
2790#endif
2791} /* cy_set_termios */
2792
2793/* This function is used to send a high-priority XON/XOFF character to
2794 the device.
2795*/
2796static void cy_send_xchar(struct tty_struct *tty, char ch)
2797{
2798 struct cyclades_port *info = tty->driver_data;
2799 struct cyclades_card *card;
2800 int channel;
2801
2802 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
2803 return;
2804
2805 info->x_char = ch;
2806
2807 if (ch)
2808 cy_start(tty);
2809
2810 card = info->card;
2811 channel = info->line - card->first_line;
2812
2813 if (cy_is_Z(card)) {
2814 if (ch == STOP_CHAR(tty))
2815 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
2816 else if (ch == START_CHAR(tty))
2817 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
2818 }
2819}
2820
2821/* This routine is called by the upper-layer tty layer to signal
2822 that incoming characters should be throttled because the input
2823 buffers are close to full.
2824 */
2825static void cy_throttle(struct tty_struct *tty)
2826{
2827 struct cyclades_port *info = tty->driver_data;
2828 struct cyclades_card *card;
2829 unsigned long flags;
2830
2831#ifdef CY_DEBUG_THROTTLE
2832 printk(KERN_DEBUG "cyc:throttle %s ...ttyC%d\n", tty_name(tty),
2833 info->line);
2834#endif
2835
2836 if (serial_paranoia_check(info, tty->name, "cy_throttle"))
2837 return;
2838
2839 card = info->card;
2840
2841 if (I_IXOFF(tty)) {
2842 if (!cy_is_Z(card))
2843 cy_send_xchar(tty, STOP_CHAR(tty));
2844 else
2845 info->throttle = 1;
2846 }
2847
2848 if (C_CRTSCTS(tty)) {
2849 if (!cy_is_Z(card)) {
2850 spin_lock_irqsave(&card->card_lock, flags);
2851 cyy_change_rts_dtr(info, 0, TIOCM_RTS);
2852 spin_unlock_irqrestore(&card->card_lock, flags);
2853 } else {
2854 info->throttle = 1;
2855 }
2856 }
2857} /* cy_throttle */
2858
2859/*
2860 * This routine notifies the tty driver that it should signal
2861 * that characters can now be sent to the tty without fear of
2862 * overrunning the input buffers of the line disciplines.
2863 */
2864static void cy_unthrottle(struct tty_struct *tty)
2865{
2866 struct cyclades_port *info = tty->driver_data;
2867 struct cyclades_card *card;
2868 unsigned long flags;
2869
2870#ifdef CY_DEBUG_THROTTLE
2871 printk(KERN_DEBUG "cyc:unthrottle %s ...ttyC%d\n",
2872 tty_name(tty), info->line);
2873#endif
2874
2875 if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
2876 return;
2877
2878 if (I_IXOFF(tty)) {
2879 if (info->x_char)
2880 info->x_char = 0;
2881 else
2882 cy_send_xchar(tty, START_CHAR(tty));
2883 }
2884
2885 if (C_CRTSCTS(tty)) {
2886 card = info->card;
2887 if (!cy_is_Z(card)) {
2888 spin_lock_irqsave(&card->card_lock, flags);
2889 cyy_change_rts_dtr(info, TIOCM_RTS, 0);
2890 spin_unlock_irqrestore(&card->card_lock, flags);
2891 } else {
2892 info->throttle = 0;
2893 }
2894 }
2895} /* cy_unthrottle */
2896
2897/* cy_start and cy_stop provide software output flow control as a
2898 function of XON/XOFF, software CTS, and other such stuff.
2899*/
2900static void cy_stop(struct tty_struct *tty)
2901{
2902 struct cyclades_card *cinfo;
2903 struct cyclades_port *info = tty->driver_data;
2904 int channel;
2905 unsigned long flags;
2906
2907#ifdef CY_DEBUG_OTHER
2908 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
2909#endif
2910
2911 if (serial_paranoia_check(info, tty->name, "cy_stop"))
2912 return;
2913
2914 cinfo = info->card;
2915 channel = info->line - cinfo->first_line;
2916 if (!cy_is_Z(cinfo)) {
2917 spin_lock_irqsave(&cinfo->card_lock, flags);
2918 cyy_writeb(info, CyCAR, channel & 0x03);
2919 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy);
2920 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2921 }
2922} /* cy_stop */
2923
2924static void cy_start(struct tty_struct *tty)
2925{
2926 struct cyclades_card *cinfo;
2927 struct cyclades_port *info = tty->driver_data;
2928 int channel;
2929 unsigned long flags;
2930
2931#ifdef CY_DEBUG_OTHER
2932 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
2933#endif
2934
2935 if (serial_paranoia_check(info, tty->name, "cy_start"))
2936 return;
2937
2938 cinfo = info->card;
2939 channel = info->line - cinfo->first_line;
2940 if (!cy_is_Z(cinfo)) {
2941 spin_lock_irqsave(&cinfo->card_lock, flags);
2942 cyy_writeb(info, CyCAR, channel & 0x03);
2943 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy);
2944 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2945 }
2946} /* cy_start */
2947
2948/*
2949 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
2950 */
2951static void cy_hangup(struct tty_struct *tty)
2952{
2953 struct cyclades_port *info = tty->driver_data;
2954
2955#ifdef CY_DEBUG_OTHER
2956 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
2957#endif
2958
2959 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
2960 return;
2961
2962 cy_flush_buffer(tty);
2963 cy_shutdown(info, tty);
2964 tty_port_hangup(&info->port);
2965} /* cy_hangup */
2966
2967static int cyy_carrier_raised(struct tty_port *port)
2968{
2969 struct cyclades_port *info = container_of(port, struct cyclades_port,
2970 port);
2971 struct cyclades_card *cinfo = info->card;
2972 unsigned long flags;
2973 int channel = info->line - cinfo->first_line;
2974 u32 cd;
2975
2976 spin_lock_irqsave(&cinfo->card_lock, flags);
2977 cyy_writeb(info, CyCAR, channel & 0x03);
2978 cd = cyy_readb(info, CyMSVR1) & CyDCD;
2979 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2980
2981 return cd;
2982}
2983
2984static void cyy_dtr_rts(struct tty_port *port, int raise)
2985{
2986 struct cyclades_port *info = container_of(port, struct cyclades_port,
2987 port);
2988 struct cyclades_card *cinfo = info->card;
2989 unsigned long flags;
2990
2991 spin_lock_irqsave(&cinfo->card_lock, flags);
2992 cyy_change_rts_dtr(info, raise ? TIOCM_RTS | TIOCM_DTR : 0,
2993 raise ? 0 : TIOCM_RTS | TIOCM_DTR);
2994 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2995}
2996
2997static int cyz_carrier_raised(struct tty_port *port)
2998{
2999 struct cyclades_port *info = container_of(port, struct cyclades_port,
3000 port);
3001
3002 return readl(&info->u.cyz.ch_ctrl->rs_status) & C_RS_DCD;
3003}
3004
3005static void cyz_dtr_rts(struct tty_port *port, int raise)
3006{
3007 struct cyclades_port *info = container_of(port, struct cyclades_port,
3008 port);
3009 struct cyclades_card *cinfo = info->card;
3010 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
3011 int ret, channel = info->line - cinfo->first_line;
3012 u32 rs;
3013
3014 rs = readl(&ch_ctrl->rs_control);
3015 if (raise)
3016 rs |= C_RS_RTS | C_RS_DTR;
3017 else
3018 rs &= ~(C_RS_RTS | C_RS_DTR);
3019 cy_writel(&ch_ctrl->rs_control, rs);
3020 ret = cyz_issue_cmd(cinfo, channel, C_CM_IOCTLM, 0L);
3021 if (ret != 0)
3022 printk(KERN_ERR "%s: retval on ttyC%d was %x\n",
3023 __func__, info->line, ret);
3024#ifdef CY_DEBUG_DTR
3025 printk(KERN_DEBUG "%s: raising Z DTR\n", __func__);
3026#endif
3027}
3028
3029static const struct tty_port_operations cyy_port_ops = {
3030 .carrier_raised = cyy_carrier_raised,
3031 .dtr_rts = cyy_dtr_rts,
3032 .shutdown = cy_do_close,
3033};
3034
3035static const struct tty_port_operations cyz_port_ops = {
3036 .carrier_raised = cyz_carrier_raised,
3037 .dtr_rts = cyz_dtr_rts,
3038 .shutdown = cy_do_close,
3039};
3040
3041/*
3042 * ---------------------------------------------------------------------
3043 * cy_init() and friends
3044 *
3045 * cy_init() is called at boot-time to initialize the serial driver.
3046 * ---------------------------------------------------------------------
3047 */
3048
3049static int cy_init_card(struct cyclades_card *cinfo)
3050{
3051 struct cyclades_port *info;
3052 unsigned int channel, port;
3053
3054 spin_lock_init(&cinfo->card_lock);
3055 cinfo->intr_enabled = 0;
3056
3057 cinfo->ports = kcalloc(cinfo->nports, sizeof(*cinfo->ports),
3058 GFP_KERNEL);
3059 if (cinfo->ports == NULL) {
3060 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
3061 return -ENOMEM;
3062 }
3063
3064 for (channel = 0, port = cinfo->first_line; channel < cinfo->nports;
3065 channel++, port++) {
3066 info = &cinfo->ports[channel];
3067 tty_port_init(&info->port);
3068 info->magic = CYCLADES_MAGIC;
3069 info->card = cinfo;
3070 info->line = port;
3071
3072 info->port.closing_wait = CLOSING_WAIT_DELAY;
3073 info->port.close_delay = 5 * HZ / 10;
3074 init_completion(&info->shutdown_wait);
3075
3076 if (cy_is_Z(cinfo)) {
3077 struct FIRM_ID *firm_id = cinfo->base_addr + ID_ADDRESS;
3078 struct ZFW_CTRL *zfw_ctrl;
3079
3080 info->port.ops = &cyz_port_ops;
3081 info->type = PORT_STARTECH;
3082
3083 zfw_ctrl = cinfo->base_addr +
3084 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3085 info->u.cyz.ch_ctrl = &zfw_ctrl->ch_ctrl[channel];
3086 info->u.cyz.buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3087
3088 if (cinfo->hw_ver == ZO_V1)
3089 info->xmit_fifo_size = CYZ_FIFO_SIZE;
3090 else
3091 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
3092#ifdef CONFIG_CYZ_INTR
3093 timer_setup(&info->rx_full_timer, cyz_rx_restart, 0);
3094#endif
3095 } else {
3096 unsigned short chip_number;
3097 int index = cinfo->bus_index;
3098
3099 info->port.ops = &cyy_port_ops;
3100 info->type = PORT_CIRRUS;
3101 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
3102 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
3103 info->cor2 = CyETC;
3104 info->cor3 = 0x08; /* _very_ small rcv threshold */
3105
3106 chip_number = channel / CyPORTS_PER_CHIP;
3107 info->u.cyy.base_addr = cinfo->base_addr +
3108 (cy_chip_offset[chip_number] << index);
3109 info->chip_rev = cyy_readb(info, CyGFRCR);
3110
3111 if (info->chip_rev >= CD1400_REV_J) {
3112 /* It is a CD1400 rev. J or later */
3113 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
3114 info->tco = baud_co_60[13]; /* Tx CO */
3115 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
3116 info->rco = baud_co_60[13]; /* Rx CO */
3117 info->rtsdtr_inv = 1;
3118 } else {
3119 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
3120 info->tco = baud_co_25[13]; /* Tx CO */
3121 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
3122 info->rco = baud_co_25[13]; /* Rx CO */
3123 info->rtsdtr_inv = 0;
3124 }
3125 info->read_status_mask = CyTIMEOUT | CySPECHAR |
3126 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
3127 }
3128
3129 }
3130
3131#ifndef CONFIG_CYZ_INTR
3132 if (cy_is_Z(cinfo) && !timer_pending(&cyz_timerlist)) {
3133 mod_timer(&cyz_timerlist, jiffies + 1);
3134#ifdef CY_PCI_DEBUG
3135 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
3136#endif
3137 }
3138#endif
3139 return 0;
3140}
3141
3142/* initialize chips on Cyclom-Y card -- return number of valid
3143 chips (which is number of ports/4) */
3144static unsigned short cyy_init_card(void __iomem *true_base_addr,
3145 int index)
3146{
3147 unsigned int chip_number;
3148 void __iomem *base_addr;
3149
3150 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
3151 /* Cy_HwReset is 0x1400 */
3152 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
3153 /* Cy_ClrIntr is 0x1800 */
3154 udelay(500L);
3155
3156 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
3157 chip_number++) {
3158 base_addr =
3159 true_base_addr + (cy_chip_offset[chip_number] << index);
3160 mdelay(1);
3161 if (readb(base_addr + (CyCCR << index)) != 0x00) {
3162 /*************
3163 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
3164 chip_number, (unsigned long)base_addr);
3165 *************/
3166 return chip_number;
3167 }
3168
3169 cy_writeb(base_addr + (CyGFRCR << index), 0);
3170 udelay(10L);
3171
3172 /* The Cyclom-16Y does not decode address bit 9 and therefore
3173 cannot distinguish between references to chip 0 and a non-
3174 existent chip 4. If the preceding clearing of the supposed
3175 chip 4 GFRCR register appears at chip 0, there is no chip 4
3176 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
3177 */
3178 if (chip_number == 4 && readb(true_base_addr +
3179 (cy_chip_offset[0] << index) +
3180 (CyGFRCR << index)) == 0) {
3181 return chip_number;
3182 }
3183
3184 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
3185 mdelay(1);
3186
3187 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
3188 /*
3189 printk(" chip #%d at %#6lx is not responding ",
3190 chip_number, (unsigned long)base_addr);
3191 printk("(GFRCR stayed 0)\n",
3192 */
3193 return chip_number;
3194 }
3195 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
3196 0x40) {
3197 /*
3198 printk(" chip #%d at %#6lx is not valid (GFRCR == "
3199 "%#2x)\n",
3200 chip_number, (unsigned long)base_addr,
3201 base_addr[CyGFRCR<<index]);
3202 */
3203 return chip_number;
3204 }
3205 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
3206 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
3207 /* It is a CD1400 rev. J or later */
3208 /* Impossible to reach 5ms with this chip.
3209 Changed to 2ms instead (f = 500 Hz). */
3210 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
3211 } else {
3212 /* f = 200 Hz */
3213 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
3214 }
3215
3216 /*
3217 printk(" chip #%d at %#6lx is rev 0x%2x\n",
3218 chip_number, (unsigned long)base_addr,
3219 readb(base_addr+(CyGFRCR<<index)));
3220 */
3221 }
3222 return chip_number;
3223} /* cyy_init_card */
3224
3225/*
3226 * ---------------------------------------------------------------------
3227 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
3228 * sets global variables and return the number of ISA boards found.
3229 * ---------------------------------------------------------------------
3230 */
3231static int __init cy_detect_isa(void)
3232{
3233#ifdef CONFIG_ISA
3234 struct cyclades_card *card;
3235 unsigned short cy_isa_irq, nboard;
3236 void __iomem *cy_isa_address;
3237 unsigned short i, j, k, cy_isa_nchan;
3238 int isparam = 0;
3239
3240 nboard = 0;
3241
3242 /* Check for module parameters */
3243 for (i = 0; i < NR_CARDS; i++) {
3244 if (maddr[i] || i) {
3245 isparam = 1;
3246 cy_isa_addresses[i] = maddr[i];
3247 }
3248 if (!maddr[i])
3249 break;
3250 }
3251
3252 /* scan the address table probing for Cyclom-Y/ISA boards */
3253 for (i = 0; i < NR_ISA_ADDRS; i++) {
3254 unsigned int isa_address = cy_isa_addresses[i];
3255 if (isa_address == 0x0000)
3256 return nboard;
3257
3258 /* probe for CD1400... */
3259 cy_isa_address = ioremap(isa_address, CyISA_Ywin);
3260 if (cy_isa_address == NULL) {
3261 printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
3262 "address\n");
3263 continue;
3264 }
3265 cy_isa_nchan = CyPORTS_PER_CHIP *
3266 cyy_init_card(cy_isa_address, 0);
3267 if (cy_isa_nchan == 0) {
3268 iounmap(cy_isa_address);
3269 continue;
3270 }
3271
3272 if (isparam && i < NR_CARDS && irq[i])
3273 cy_isa_irq = irq[i];
3274 else
3275 /* find out the board's irq by probing */
3276 cy_isa_irq = detect_isa_irq(cy_isa_address);
3277 if (cy_isa_irq == 0) {
3278 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
3279 "IRQ could not be detected.\n",
3280 (unsigned long)cy_isa_address);
3281 iounmap(cy_isa_address);
3282 continue;
3283 }
3284
3285 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
3286 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
3287 "more channels are available. Change NR_PORTS "
3288 "in cyclades.c and recompile kernel.\n",
3289 (unsigned long)cy_isa_address);
3290 iounmap(cy_isa_address);
3291 return nboard;
3292 }
3293 /* fill the next cy_card structure available */
3294 for (j = 0; j < NR_CARDS; j++) {
3295 card = &cy_card[j];
3296 if (card->base_addr == NULL)
3297 break;
3298 }
3299 if (j == NR_CARDS) { /* no more cy_cards available */
3300 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
3301 "more cards can be used. Change NR_CARDS in "
3302 "cyclades.c and recompile kernel.\n",
3303 (unsigned long)cy_isa_address);
3304 iounmap(cy_isa_address);
3305 return nboard;
3306 }
3307
3308 /* allocate IRQ */
3309 if (request_irq(cy_isa_irq, cyy_interrupt,
3310 0, "Cyclom-Y", card)) {
3311 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
3312 "could not allocate IRQ#%d.\n",
3313 (unsigned long)cy_isa_address, cy_isa_irq);
3314 iounmap(cy_isa_address);
3315 return nboard;
3316 }
3317
3318 /* set cy_card */
3319 card->base_addr = cy_isa_address;
3320 card->ctl_addr.p9050 = NULL;
3321 card->irq = (int)cy_isa_irq;
3322 card->bus_index = 0;
3323 card->first_line = cy_next_channel;
3324 card->num_chips = cy_isa_nchan / CyPORTS_PER_CHIP;
3325 card->nports = cy_isa_nchan;
3326 if (cy_init_card(card)) {
3327 card->base_addr = NULL;
3328 free_irq(cy_isa_irq, card);
3329 iounmap(cy_isa_address);
3330 continue;
3331 }
3332 nboard++;
3333
3334 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
3335 "%d channels starting from port %d\n",
3336 j + 1, (unsigned long)cy_isa_address,
3337 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
3338 cy_isa_irq, cy_isa_nchan, cy_next_channel);
3339
3340 for (k = 0, j = cy_next_channel;
3341 j < cy_next_channel + cy_isa_nchan; j++, k++)
3342 tty_port_register_device(&card->ports[k].port,
3343 cy_serial_driver, j, NULL);
3344 cy_next_channel += cy_isa_nchan;
3345 }
3346 return nboard;
3347#else
3348 return 0;
3349#endif /* CONFIG_ISA */
3350} /* cy_detect_isa */
3351
3352#ifdef CONFIG_PCI
3353static inline int cyc_isfwstr(const char *str, unsigned int size)
3354{
3355 unsigned int a;
3356
3357 for (a = 0; a < size && *str; a++, str++)
3358 if (*str & 0x80)
3359 return -EINVAL;
3360
3361 for (; a < size; a++, str++)
3362 if (*str)
3363 return -EINVAL;
3364
3365 return 0;
3366}
3367
3368static inline void cyz_fpga_copy(void __iomem *fpga, const u8 *data,
3369 unsigned int size)
3370{
3371 for (; size > 0; size--) {
3372 cy_writel(fpga, *data++);
3373 udelay(10);
3374 }
3375}
3376
3377static void plx_init(struct pci_dev *pdev, int irq,
3378 struct RUNTIME_9060 __iomem *addr)
3379{
3380 /* Reset PLX */
3381 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
3382 udelay(100L);
3383 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
3384
3385 /* Reload Config. Registers from EEPROM */
3386 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
3387 udelay(100L);
3388 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
3389
3390 /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
3391 * the IRQ is lost and, thus, we have to re-write it to the PCI config.
3392 * registers. This will remain here until we find a permanent fix.
3393 */
3394 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
3395}
3396
3397static int __cyz_load_fw(const struct firmware *fw,
3398 const char *name, const u32 mailbox, void __iomem *base,
3399 void __iomem *fpga)
3400{
3401 const void *ptr = fw->data;
3402 const struct zfile_header *h = ptr;
3403 const struct zfile_config *c, *cs;
3404 const struct zfile_block *b, *bs;
3405 unsigned int a, tmp, len = fw->size;
3406#define BAD_FW KERN_ERR "Bad firmware: "
3407 if (len < sizeof(*h)) {
3408 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
3409 return -EINVAL;
3410 }
3411
3412 cs = ptr + h->config_offset;
3413 bs = ptr + h->block_offset;
3414
3415 if ((void *)(cs + h->n_config) > ptr + len ||
3416 (void *)(bs + h->n_blocks) > ptr + len) {
3417 printk(BAD_FW "too short");
3418 return -EINVAL;
3419 }
3420
3421 if (cyc_isfwstr(h->name, sizeof(h->name)) ||
3422 cyc_isfwstr(h->date, sizeof(h->date))) {
3423 printk(BAD_FW "bad formatted header string\n");
3424 return -EINVAL;
3425 }
3426
3427 if (strncmp(name, h->name, sizeof(h->name))) {
3428 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
3429 return -EINVAL;
3430 }
3431
3432 tmp = 0;
3433 for (c = cs; c < cs + h->n_config; c++) {
3434 for (a = 0; a < c->n_blocks; a++)
3435 if (c->block_list[a] > h->n_blocks) {
3436 printk(BAD_FW "bad block ref number in cfgs\n");
3437 return -EINVAL;
3438 }
3439 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
3440 tmp++;
3441 }
3442 if (!tmp) {
3443 printk(BAD_FW "nothing appropriate\n");
3444 return -EINVAL;
3445 }
3446
3447 for (b = bs; b < bs + h->n_blocks; b++)
3448 if (b->file_offset + b->size > len) {
3449 printk(BAD_FW "bad block data offset\n");
3450 return -EINVAL;
3451 }
3452
3453 /* everything is OK, let's seek'n'load it */
3454 for (c = cs; c < cs + h->n_config; c++)
3455 if (c->mailbox == mailbox && c->function == 0)
3456 break;
3457
3458 for (a = 0; a < c->n_blocks; a++) {
3459 b = &bs[c->block_list[a]];
3460 if (b->type == ZBLOCK_FPGA) {
3461 if (fpga != NULL)
3462 cyz_fpga_copy(fpga, ptr + b->file_offset,
3463 b->size);
3464 } else {
3465 if (base != NULL)
3466 memcpy_toio(base + b->ram_offset,
3467 ptr + b->file_offset, b->size);
3468 }
3469 }
3470#undef BAD_FW
3471 return 0;
3472}
3473
3474static int cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
3475 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
3476{
3477 const struct firmware *fw;
3478 struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
3479 struct CUSTOM_REG __iomem *cust = base_addr;
3480 struct ZFW_CTRL __iomem *pt_zfwctrl;
3481 void __iomem *tmp;
3482 u32 mailbox, status, nchan;
3483 unsigned int i;
3484 int retval;
3485
3486 retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
3487 if (retval) {
3488 dev_err(&pdev->dev, "can't get firmware\n");
3489 goto err;
3490 }
3491
3492 /* Check whether the firmware is already loaded and running. If
3493 positive, skip this board */
3494 if (__cyz_fpga_loaded(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
3495 u32 cntval = readl(base_addr + 0x190);
3496
3497 udelay(100);
3498 if (cntval != readl(base_addr + 0x190)) {
3499 /* FW counter is working, FW is running */
3500 dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
3501 "Skipping board.\n");
3502 retval = 0;
3503 goto err_rel;
3504 }
3505 }
3506
3507 /* start boot */
3508 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
3509 ~0x00030800UL);
3510
3511 mailbox = readl(&ctl_addr->mail_box_0);
3512
3513 if (mailbox == 0 || __cyz_fpga_loaded(ctl_addr)) {
3514 /* stops CPU and set window to beginning of RAM */
3515 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3516 cy_writel(&cust->cpu_stop, 0);
3517 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3518 udelay(100);
3519 }
3520
3521 plx_init(pdev, irq, ctl_addr);
3522
3523 if (mailbox != 0) {
3524 /* load FPGA */
3525 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
3526 base_addr);
3527 if (retval)
3528 goto err_rel;
3529 if (!__cyz_fpga_loaded(ctl_addr)) {
3530 dev_err(&pdev->dev, "fw upload successful, but fw is "
3531 "not loaded\n");
3532 goto err_rel;
3533 }
3534 }
3535
3536 /* stops CPU and set window to beginning of RAM */
3537 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3538 cy_writel(&cust->cpu_stop, 0);
3539 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3540 udelay(100);
3541
3542 /* clear memory */
3543 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
3544 cy_writeb(tmp, 255);
3545 if (mailbox != 0) {
3546 /* set window to last 512K of RAM */
3547 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
3548 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
3549 cy_writeb(tmp, 255);
3550 /* set window to beginning of RAM */
3551 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3552 }
3553
3554 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
3555 release_firmware(fw);
3556 if (retval)
3557 goto err;
3558
3559 /* finish boot and start boards */
3560 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3561 cy_writel(&cust->cpu_start, 0);
3562 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3563 i = 0;
3564 while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
3565 msleep(100);
3566 if (status != ZFIRM_ID) {
3567 if (status == ZFIRM_HLT) {
3568 dev_err(&pdev->dev, "you need an external power supply "
3569 "for this number of ports. Firmware halted and "
3570 "board reset.\n");
3571 retval = -EIO;
3572 goto err;
3573 }
3574 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
3575 "some more time\n", status);
3576 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
3577 i++ < 200)
3578 msleep(100);
3579 if (status != ZFIRM_ID) {
3580 dev_err(&pdev->dev, "Board not started in 20 seconds! "
3581 "Giving up. (fid->signature = 0x%x)\n",
3582 status);
3583 dev_info(&pdev->dev, "*** Warning ***: if you are "
3584 "upgrading the FW, please power cycle the "
3585 "system before loading the new FW to the "
3586 "Cyclades-Z.\n");
3587
3588 if (__cyz_fpga_loaded(ctl_addr))
3589 plx_init(pdev, irq, ctl_addr);
3590
3591 retval = -EIO;
3592 goto err;
3593 }
3594 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
3595 i / 10);
3596 }
3597 pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
3598
3599 dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
3600 base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
3601 base_addr + readl(&fid->zfwctrl_addr));
3602
3603 nchan = readl(&pt_zfwctrl->board_ctrl.n_channel);
3604 dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
3605 readl(&pt_zfwctrl->board_ctrl.fw_version), nchan);
3606
3607 if (nchan == 0) {
3608 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
3609 "check the connection between the Z host card and the "
3610 "serial expanders.\n");
3611
3612 if (__cyz_fpga_loaded(ctl_addr))
3613 plx_init(pdev, irq, ctl_addr);
3614
3615 dev_info(&pdev->dev, "Null number of ports detected. Board "
3616 "reset.\n");
3617 retval = 0;
3618 goto err;
3619 }
3620
3621 cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
3622 cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
3623
3624 /*
3625 Early firmware failed to start looking for commands.
3626 This enables firmware interrupts for those commands.
3627 */
3628 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
3629 (1 << 17));
3630 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
3631 0x00030800UL);
3632
3633 return nchan;
3634err_rel:
3635 release_firmware(fw);
3636err:
3637 return retval;
3638}
3639
3640static int cy_pci_probe(struct pci_dev *pdev,
3641 const struct pci_device_id *ent)
3642{
3643 struct cyclades_card *card;
3644 void __iomem *addr0 = NULL, *addr2 = NULL;
3645 char *card_name = NULL;
3646 u32 mailbox;
3647 unsigned int device_id, nchan = 0, card_no, i, j;
3648 unsigned char plx_ver;
3649 int retval, irq;
3650
3651 retval = pci_enable_device(pdev);
3652 if (retval) {
3653 dev_err(&pdev->dev, "cannot enable device\n");
3654 goto err;
3655 }
3656
3657 /* read PCI configuration area */
3658 irq = pdev->irq;
3659 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
3660
3661#if defined(__alpha__)
3662 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
3663 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
3664 "addresses on Alpha systems.\n");
3665 retval = -EIO;
3666 goto err_dis;
3667 }
3668#endif
3669 if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
3670 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
3671 "addresses\n");
3672 retval = -EIO;
3673 goto err_dis;
3674 }
3675
3676 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
3677 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
3678 "it...\n");
3679 pdev->resource[2].flags &= ~IORESOURCE_IO;
3680 }
3681
3682 retval = pci_request_regions(pdev, "cyclades");
3683 if (retval) {
3684 dev_err(&pdev->dev, "failed to reserve resources\n");
3685 goto err_dis;
3686 }
3687
3688 retval = -EIO;
3689 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
3690 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3691 card_name = "Cyclom-Y";
3692
3693 addr0 = ioremap(pci_resource_start(pdev, 0),
3694 CyPCI_Yctl);
3695 if (addr0 == NULL) {
3696 dev_err(&pdev->dev, "can't remap ctl region\n");
3697 goto err_reg;
3698 }
3699 addr2 = ioremap(pci_resource_start(pdev, 2),
3700 CyPCI_Ywin);
3701 if (addr2 == NULL) {
3702 dev_err(&pdev->dev, "can't remap base region\n");
3703 goto err_unmap;
3704 }
3705
3706 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
3707 if (nchan == 0) {
3708 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
3709 "Serial-Modules\n");
3710 goto err_unmap;
3711 }
3712 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
3713 struct RUNTIME_9060 __iomem *ctl_addr;
3714
3715 ctl_addr = addr0 = ioremap(pci_resource_start(pdev, 0),
3716 CyPCI_Zctl);
3717 if (addr0 == NULL) {
3718 dev_err(&pdev->dev, "can't remap ctl region\n");
3719 goto err_reg;
3720 }
3721
3722 /* Disable interrupts on the PLX before resetting it */
3723 cy_writew(&ctl_addr->intr_ctrl_stat,
3724 readw(&ctl_addr->intr_ctrl_stat) & ~0x0900);
3725
3726 plx_init(pdev, irq, addr0);
3727
3728 mailbox = readl(&ctl_addr->mail_box_0);
3729
3730 addr2 = ioremap(pci_resource_start(pdev, 2),
3731 mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin);
3732 if (addr2 == NULL) {
3733 dev_err(&pdev->dev, "can't remap base region\n");
3734 goto err_unmap;
3735 }
3736
3737 if (mailbox == ZE_V1) {
3738 card_name = "Cyclades-Ze";
3739 } else {
3740 card_name = "Cyclades-8Zo";
3741#ifdef CY_PCI_DEBUG
3742 if (mailbox == ZO_V1) {
3743 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3744 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
3745 "id %lx, ver %lx\n", (ulong)(0xff &
3746 readl(&((struct CUSTOM_REG *)addr2)->
3747 fpga_id)), (ulong)(0xff &
3748 readl(&((struct CUSTOM_REG *)addr2)->
3749 fpga_version)));
3750 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3751 } else {
3752 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
3753 "Cyclades-Z board. FPGA not loaded\n");
3754 }
3755#endif
3756 /* The following clears the firmware id word. This
3757 ensures that the driver will not attempt to talk to
3758 the board until it has been properly initialized.
3759 */
3760 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
3761 cy_writel(addr2 + ID_ADDRESS, 0L);
3762 }
3763
3764 retval = cyz_load_fw(pdev, addr2, addr0, irq);
3765 if (retval <= 0)
3766 goto err_unmap;
3767 nchan = retval;
3768 }
3769
3770 if ((cy_next_channel + nchan) > NR_PORTS) {
3771 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
3772 "channels are available. Change NR_PORTS in "
3773 "cyclades.c and recompile kernel.\n");
3774 goto err_unmap;
3775 }
3776 /* fill the next cy_card structure available */
3777 for (card_no = 0; card_no < NR_CARDS; card_no++) {
3778 card = &cy_card[card_no];
3779 if (card->base_addr == NULL)
3780 break;
3781 }
3782 if (card_no == NR_CARDS) { /* no more cy_cards available */
3783 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
3784 "more cards can be used. Change NR_CARDS in "
3785 "cyclades.c and recompile kernel.\n");
3786 goto err_unmap;
3787 }
3788
3789 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
3790 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3791 /* allocate IRQ */
3792 retval = request_irq(irq, cyy_interrupt,
3793 IRQF_SHARED, "Cyclom-Y", card);
3794 if (retval) {
3795 dev_err(&pdev->dev, "could not allocate IRQ\n");
3796 goto err_unmap;
3797 }
3798 card->num_chips = nchan / CyPORTS_PER_CHIP;
3799 } else {
3800 struct FIRM_ID __iomem *firm_id = addr2 + ID_ADDRESS;
3801 struct ZFW_CTRL __iomem *zfw_ctrl;
3802
3803 zfw_ctrl = addr2 + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3804
3805 card->hw_ver = mailbox;
3806 card->num_chips = (unsigned int)-1;
3807 card->board_ctrl = &zfw_ctrl->board_ctrl;
3808#ifdef CONFIG_CYZ_INTR
3809 /* allocate IRQ only if board has an IRQ */
3810 if (irq != 0 && irq != 255) {
3811 retval = request_irq(irq, cyz_interrupt,
3812 IRQF_SHARED, "Cyclades-Z", card);
3813 if (retval) {
3814 dev_err(&pdev->dev, "could not allocate IRQ\n");
3815 goto err_unmap;
3816 }
3817 }
3818#endif /* CONFIG_CYZ_INTR */
3819 }
3820
3821 /* set cy_card */
3822 card->base_addr = addr2;
3823 card->ctl_addr.p9050 = addr0;
3824 card->irq = irq;
3825 card->bus_index = 1;
3826 card->first_line = cy_next_channel;
3827 card->nports = nchan;
3828 retval = cy_init_card(card);
3829 if (retval)
3830 goto err_null;
3831
3832 pci_set_drvdata(pdev, card);
3833
3834 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
3835 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3836 /* enable interrupts in the PCI interface */
3837 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
3838 switch (plx_ver) {
3839 case PLX_9050:
3840 cy_writeb(addr0 + 0x4c, 0x43);
3841 break;
3842
3843 case PLX_9060:
3844 case PLX_9080:
3845 default: /* Old boards, use PLX_9060 */
3846 {
3847 struct RUNTIME_9060 __iomem *ctl_addr = addr0;
3848 plx_init(pdev, irq, ctl_addr);
3849 cy_writew(&ctl_addr->intr_ctrl_stat,
3850 readw(&ctl_addr->intr_ctrl_stat) | 0x0900);
3851 break;
3852 }
3853 }
3854 }
3855
3856 dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
3857 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
3858 for (j = 0, i = cy_next_channel; i < cy_next_channel + nchan; i++, j++)
3859 tty_port_register_device(&card->ports[j].port,
3860 cy_serial_driver, i, &pdev->dev);
3861 cy_next_channel += nchan;
3862
3863 return 0;
3864err_null:
3865 card->base_addr = NULL;
3866 free_irq(irq, card);
3867err_unmap:
3868 iounmap(addr0);
3869 if (addr2)
3870 iounmap(addr2);
3871err_reg:
3872 pci_release_regions(pdev);
3873err_dis:
3874 pci_disable_device(pdev);
3875err:
3876 return retval;
3877}
3878
3879static void cy_pci_remove(struct pci_dev *pdev)
3880{
3881 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
3882 unsigned int i, channel;
3883
3884 /* non-Z with old PLX */
3885 if (!cy_is_Z(cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
3886 PLX_9050)
3887 cy_writeb(cinfo->ctl_addr.p9050 + 0x4c, 0);
3888 else
3889#ifndef CONFIG_CYZ_INTR
3890 if (!cy_is_Z(cinfo))
3891#endif
3892 cy_writew(&cinfo->ctl_addr.p9060->intr_ctrl_stat,
3893 readw(&cinfo->ctl_addr.p9060->intr_ctrl_stat) &
3894 ~0x0900);
3895
3896 iounmap(cinfo->base_addr);
3897 if (cinfo->ctl_addr.p9050)
3898 iounmap(cinfo->ctl_addr.p9050);
3899 if (cinfo->irq
3900#ifndef CONFIG_CYZ_INTR
3901 && !cy_is_Z(cinfo)
3902#endif /* CONFIG_CYZ_INTR */
3903 )
3904 free_irq(cinfo->irq, cinfo);
3905 pci_release_regions(pdev);
3906
3907 cinfo->base_addr = NULL;
3908 for (channel = 0, i = cinfo->first_line; i < cinfo->first_line +
3909 cinfo->nports; i++, channel++) {
3910 tty_unregister_device(cy_serial_driver, i);
3911 tty_port_destroy(&cinfo->ports[channel].port);
3912 }
3913 cinfo->nports = 0;
3914 kfree(cinfo->ports);
3915}
3916
3917static struct pci_driver cy_pci_driver = {
3918 .name = "cyclades",
3919 .id_table = cy_pci_dev_id,
3920 .probe = cy_pci_probe,
3921 .remove = cy_pci_remove
3922};
3923#endif
3924
3925static int cyclades_proc_show(struct seq_file *m, void *v)
3926{
3927 struct cyclades_port *info;
3928 unsigned int i, j;
3929 __u32 cur_jifs = jiffies;
3930
3931 seq_puts(m, "Dev TimeOpen BytesOut IdleOut BytesIn "
3932 "IdleIn Overruns Ldisc\n");
3933
3934 /* Output one line for each known port */
3935 for (i = 0; i < NR_CARDS; i++)
3936 for (j = 0; j < cy_card[i].nports; j++) {
3937 info = &cy_card[i].ports[j];
3938
3939 if (info->port.count) {
3940 /* XXX is the ldisc num worth this? */
3941 struct tty_struct *tty;
3942 struct tty_ldisc *ld;
3943 int num = 0;
3944 tty = tty_port_tty_get(&info->port);
3945 if (tty) {
3946 ld = tty_ldisc_ref(tty);
3947 if (ld) {
3948 num = ld->ops->num;
3949 tty_ldisc_deref(ld);
3950 }
3951 tty_kref_put(tty);
3952 }
3953 seq_printf(m, "%3d %8lu %10lu %8lu "
3954 "%10lu %8lu %9lu %6d\n", info->line,
3955 (cur_jifs - info->idle_stats.in_use) /
3956 HZ, info->idle_stats.xmit_bytes,
3957 (cur_jifs - info->idle_stats.xmit_idle)/
3958 HZ, info->idle_stats.recv_bytes,
3959 (cur_jifs - info->idle_stats.recv_idle)/
3960 HZ, info->idle_stats.overruns,
3961 num);
3962 } else
3963 seq_printf(m, "%3d %8lu %10lu %8lu "
3964 "%10lu %8lu %9lu %6ld\n",
3965 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
3966 }
3967 return 0;
3968}
3969
3970/* The serial driver boot-time initialization code!
3971 Hardware I/O ports are mapped to character special devices on a
3972 first found, first allocated manner. That is, this code searches
3973 for Cyclom cards in the system. As each is found, it is probed
3974 to discover how many chips (and thus how many ports) are present.
3975 These ports are mapped to the tty ports 32 and upward in monotonic
3976 fashion. If an 8-port card is replaced with a 16-port card, the
3977 port mapping on a following card will shift.
3978
3979 This approach is different from what is used in the other serial
3980 device driver because the Cyclom is more properly a multiplexer,
3981 not just an aggregation of serial ports on one card.
3982
3983 If there are more cards with more ports than have been
3984 statically allocated above, a warning is printed and the
3985 extra ports are ignored.
3986 */
3987
3988static const struct tty_operations cy_ops = {
3989 .open = cy_open,
3990 .close = cy_close,
3991 .write = cy_write,
3992 .put_char = cy_put_char,
3993 .flush_chars = cy_flush_chars,
3994 .write_room = cy_write_room,
3995 .chars_in_buffer = cy_chars_in_buffer,
3996 .flush_buffer = cy_flush_buffer,
3997 .ioctl = cy_ioctl,
3998 .throttle = cy_throttle,
3999 .unthrottle = cy_unthrottle,
4000 .set_termios = cy_set_termios,
4001 .stop = cy_stop,
4002 .start = cy_start,
4003 .hangup = cy_hangup,
4004 .break_ctl = cy_break,
4005 .wait_until_sent = cy_wait_until_sent,
4006 .tiocmget = cy_tiocmget,
4007 .tiocmset = cy_tiocmset,
4008 .get_icount = cy_get_icount,
4009 .set_serial = cy_set_serial_info,
4010 .get_serial = cy_get_serial_info,
4011 .proc_show = cyclades_proc_show,
4012};
4013
4014static int __init cy_init(void)
4015{
4016 unsigned int nboards;
4017 int retval = -ENOMEM;
4018
4019 cy_serial_driver = alloc_tty_driver(NR_PORTS);
4020 if (!cy_serial_driver)
4021 goto err;
4022
4023 printk(KERN_INFO "Cyclades driver " CY_VERSION "\n");
4024
4025 /* Initialize the tty_driver structure */
4026
4027 cy_serial_driver->driver_name = "cyclades";
4028 cy_serial_driver->name = "ttyC";
4029 cy_serial_driver->major = CYCLADES_MAJOR;
4030 cy_serial_driver->minor_start = 0;
4031 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
4032 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
4033 cy_serial_driver->init_termios = tty_std_termios;
4034 cy_serial_driver->init_termios.c_cflag =
4035 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
4036 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
4037 tty_set_operations(cy_serial_driver, &cy_ops);
4038
4039 retval = tty_register_driver(cy_serial_driver);
4040 if (retval) {
4041 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
4042 goto err_frtty;
4043 }
4044
4045 /* the code below is responsible to find the boards. Each different
4046 type of board has its own detection routine. If a board is found,
4047 the next cy_card structure available is set by the detection
4048 routine. These functions are responsible for checking the
4049 availability of cy_card and cy_port data structures and updating
4050 the cy_next_channel. */
4051
4052 /* look for isa boards */
4053 nboards = cy_detect_isa();
4054
4055#ifdef CONFIG_PCI
4056 /* look for pci boards */
4057 retval = pci_register_driver(&cy_pci_driver);
4058 if (retval && !nboards) {
4059 tty_unregister_driver(cy_serial_driver);
4060 goto err_frtty;
4061 }
4062#endif
4063
4064 return 0;
4065err_frtty:
4066 put_tty_driver(cy_serial_driver);
4067err:
4068 return retval;
4069} /* cy_init */
4070
4071static void __exit cy_cleanup_module(void)
4072{
4073 struct cyclades_card *card;
4074 unsigned int i, e1;
4075
4076#ifndef CONFIG_CYZ_INTR
4077 del_timer_sync(&cyz_timerlist);
4078#endif /* CONFIG_CYZ_INTR */
4079
4080 e1 = tty_unregister_driver(cy_serial_driver);
4081 if (e1)
4082 printk(KERN_ERR "failed to unregister Cyclades serial "
4083 "driver(%d)\n", e1);
4084
4085#ifdef CONFIG_PCI
4086 pci_unregister_driver(&cy_pci_driver);
4087#endif
4088
4089 for (i = 0; i < NR_CARDS; i++) {
4090 card = &cy_card[i];
4091 if (card->base_addr) {
4092 /* clear interrupt */
4093 cy_writeb(card->base_addr + Cy_ClrIntr, 0);
4094 iounmap(card->base_addr);
4095 if (card->ctl_addr.p9050)
4096 iounmap(card->ctl_addr.p9050);
4097 if (card->irq
4098#ifndef CONFIG_CYZ_INTR
4099 && !cy_is_Z(card)
4100#endif /* CONFIG_CYZ_INTR */
4101 )
4102 free_irq(card->irq, card);
4103 for (e1 = card->first_line; e1 < card->first_line +
4104 card->nports; e1++)
4105 tty_unregister_device(cy_serial_driver, e1);
4106 kfree(card->ports);
4107 }
4108 }
4109
4110 put_tty_driver(cy_serial_driver);
4111} /* cy_cleanup_module */
4112
4113module_init(cy_init);
4114module_exit(cy_cleanup_module);
4115
4116MODULE_LICENSE("GPL");
4117MODULE_VERSION(CY_VERSION);
4118MODULE_ALIAS_CHARDEV_MAJOR(CYCLADES_MAJOR);
4119MODULE_FIRMWARE("cyzfirm.bin");
1#undef BLOCKMOVE
2#define Z_WAKE
3#undef Z_EXT_CHARS_IN_BUFFER
4
5/*
6 * This file contains the driver for the Cyclades async multiport
7 * serial boards.
8 *
9 * Initially written by Randolph Bentson <bentson@grieg.seaslug.org>.
10 * Modified and maintained by Marcio Saito <marcio@cyclades.com>.
11 *
12 * Copyright (C) 2007-2009 Jiri Slaby <jirislaby@gmail.com>
13 *
14 * Much of the design and some of the code came from serial.c
15 * which was copyright (C) 1991, 1992 Linus Torvalds. It was
16 * extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92,
17 * and then fixed as suggested by Michael K. Johnson 12/12/92.
18 * Converted to pci probing and cleaned up by Jiri Slaby.
19 *
20 */
21
22#define CY_VERSION "2.6"
23
24/* If you need to install more boards than NR_CARDS, change the constant
25 in the definition below. No other change is necessary to support up to
26 eight boards. Beyond that you'll have to extend cy_isa_addresses. */
27
28#define NR_CARDS 4
29
30/*
31 If the total number of ports is larger than NR_PORTS, change this
32 constant in the definition below. No other change is necessary to
33 support more boards/ports. */
34
35#define NR_PORTS 256
36
37#define ZO_V1 0
38#define ZO_V2 1
39#define ZE_V1 2
40
41#define SERIAL_PARANOIA_CHECK
42#undef CY_DEBUG_OPEN
43#undef CY_DEBUG_THROTTLE
44#undef CY_DEBUG_OTHER
45#undef CY_DEBUG_IO
46#undef CY_DEBUG_COUNT
47#undef CY_DEBUG_DTR
48#undef CY_DEBUG_INTERRUPTS
49#undef CY_16Y_HACK
50#undef CY_ENABLE_MONITORING
51#undef CY_PCI_DEBUG
52
53/*
54 * Include section
55 */
56#include <linux/module.h>
57#include <linux/errno.h>
58#include <linux/signal.h>
59#include <linux/sched.h>
60#include <linux/timer.h>
61#include <linux/interrupt.h>
62#include <linux/tty.h>
63#include <linux/tty_flip.h>
64#include <linux/serial.h>
65#include <linux/major.h>
66#include <linux/string.h>
67#include <linux/fcntl.h>
68#include <linux/ptrace.h>
69#include <linux/cyclades.h>
70#include <linux/mm.h>
71#include <linux/ioport.h>
72#include <linux/init.h>
73#include <linux/delay.h>
74#include <linux/spinlock.h>
75#include <linux/bitops.h>
76#include <linux/firmware.h>
77#include <linux/device.h>
78#include <linux/slab.h>
79
80#include <linux/io.h>
81#include <linux/uaccess.h>
82
83#include <linux/kernel.h>
84#include <linux/pci.h>
85
86#include <linux/stat.h>
87#include <linux/proc_fs.h>
88#include <linux/seq_file.h>
89
90static void cy_send_xchar(struct tty_struct *tty, char ch);
91
92#ifndef SERIAL_XMIT_SIZE
93#define SERIAL_XMIT_SIZE (min(PAGE_SIZE, 4096))
94#endif
95
96#define STD_COM_FLAGS (0)
97
98/* firmware stuff */
99#define ZL_MAX_BLOCKS 16
100#define DRIVER_VERSION 0x02010203
101#define RAM_SIZE 0x80000
102
103enum zblock_type {
104 ZBLOCK_PRG = 0,
105 ZBLOCK_FPGA = 1
106};
107
108struct zfile_header {
109 char name[64];
110 char date[32];
111 char aux[32];
112 u32 n_config;
113 u32 config_offset;
114 u32 n_blocks;
115 u32 block_offset;
116 u32 reserved[9];
117} __attribute__ ((packed));
118
119struct zfile_config {
120 char name[64];
121 u32 mailbox;
122 u32 function;
123 u32 n_blocks;
124 u32 block_list[ZL_MAX_BLOCKS];
125} __attribute__ ((packed));
126
127struct zfile_block {
128 u32 type;
129 u32 file_offset;
130 u32 ram_offset;
131 u32 size;
132} __attribute__ ((packed));
133
134static struct tty_driver *cy_serial_driver;
135
136#ifdef CONFIG_ISA
137/* This is the address lookup table. The driver will probe for
138 Cyclom-Y/ISA boards at all addresses in here. If you want the
139 driver to probe addresses at a different address, add it to
140 this table. If the driver is probing some other board and
141 causing problems, remove the offending address from this table.
142*/
143
144static unsigned int cy_isa_addresses[] = {
145 0xD0000,
146 0xD2000,
147 0xD4000,
148 0xD6000,
149 0xD8000,
150 0xDA000,
151 0xDC000,
152 0xDE000,
153 0, 0, 0, 0, 0, 0, 0, 0
154};
155
156#define NR_ISA_ADDRS ARRAY_SIZE(cy_isa_addresses)
157
158static long maddr[NR_CARDS];
159static int irq[NR_CARDS];
160
161module_param_array(maddr, long, NULL, 0);
162module_param_array(irq, int, NULL, 0);
163
164#endif /* CONFIG_ISA */
165
166/* This is the per-card data structure containing address, irq, number of
167 channels, etc. This driver supports a maximum of NR_CARDS cards.
168*/
169static struct cyclades_card cy_card[NR_CARDS];
170
171static int cy_next_channel; /* next minor available */
172
173/*
174 * This is used to look up the divisor speeds and the timeouts
175 * We're normally limited to 15 distinct baud rates. The extra
176 * are accessed via settings in info->port.flags.
177 * 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,
178 * 10, 11, 12, 13, 14, 15, 16, 17, 18, 19,
179 * HI VHI
180 * 20
181 */
182static const int baud_table[] = {
183 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200,
184 1800, 2400, 4800, 9600, 19200, 38400, 57600, 76800, 115200, 150000,
185 230400, 0
186};
187
188static const char baud_co_25[] = { /* 25 MHz clock option table */
189 /* value => 00 01 02 03 04 */
190 /* divide by 8 32 128 512 2048 */
191 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03, 0x03, 0x02,
192 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00
193};
194
195static const char baud_bpr_25[] = { /* 25 MHz baud rate period table */
196 0x00, 0xf5, 0xa3, 0x6f, 0x5c, 0x51, 0xf5, 0xa3, 0x51, 0xa3,
197 0x6d, 0x51, 0xa3, 0x51, 0xa3, 0x51, 0x36, 0x29, 0x1b, 0x15
198};
199
200static const char baud_co_60[] = { /* 60 MHz clock option table (CD1400 J) */
201 /* value => 00 01 02 03 04 */
202 /* divide by 8 32 128 512 2048 */
203 0x00, 0x00, 0x00, 0x04, 0x04, 0x04, 0x04, 0x04, 0x03, 0x03,
204 0x03, 0x02, 0x02, 0x01, 0x01, 0x00, 0x00, 0x00, 0x00, 0x00,
205 0x00
206};
207
208static const char baud_bpr_60[] = { /* 60 MHz baud rate period table (CD1400 J) */
209 0x00, 0x82, 0x21, 0xff, 0xdb, 0xc3, 0x92, 0x62, 0xc3, 0x62,
210 0x41, 0xc3, 0x62, 0xc3, 0x62, 0xc3, 0x82, 0x62, 0x41, 0x32,
211 0x21
212};
213
214static const char baud_cor3[] = { /* receive threshold */
215 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
216 0x0a, 0x0a, 0x0a, 0x09, 0x09, 0x08, 0x08, 0x08, 0x08, 0x07,
217 0x07
218};
219
220/*
221 * The Cyclades driver implements HW flow control as any serial driver.
222 * The cyclades_port structure member rflow and the vector rflow_thr
223 * allows us to take advantage of a special feature in the CD1400 to avoid
224 * data loss even when the system interrupt latency is too high. These flags
225 * are to be used only with very special applications. Setting these flags
226 * requires the use of a special cable (DTR and RTS reversed). In the new
227 * CD1400-based boards (rev. 6.00 or later), there is no need for special
228 * cables.
229 */
230
231static const char rflow_thr[] = { /* rflow threshold */
232 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
233 0x00, 0x00, 0x00, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a, 0x0a,
234 0x0a
235};
236
237/* The Cyclom-Ye has placed the sequential chips in non-sequential
238 * address order. This look-up table overcomes that problem.
239 */
240static const unsigned int cy_chip_offset[] = { 0x0000,
241 0x0400,
242 0x0800,
243 0x0C00,
244 0x0200,
245 0x0600,
246 0x0A00,
247 0x0E00
248};
249
250/* PCI related definitions */
251
252#ifdef CONFIG_PCI
253static const struct pci_device_id cy_pci_dev_id[] = {
254 /* PCI < 1Mb */
255 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Lo) },
256 /* PCI > 1Mb */
257 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Y_Hi) },
258 /* 4Y PCI < 1Mb */
259 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Lo) },
260 /* 4Y PCI > 1Mb */
261 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_4Y_Hi) },
262 /* 8Y PCI < 1Mb */
263 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Lo) },
264 /* 8Y PCI > 1Mb */
265 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_8Y_Hi) },
266 /* Z PCI < 1Mb */
267 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Lo) },
268 /* Z PCI > 1Mb */
269 { PCI_DEVICE(PCI_VENDOR_ID_CYCLADES, PCI_DEVICE_ID_CYCLOM_Z_Hi) },
270 { } /* end of table */
271};
272MODULE_DEVICE_TABLE(pci, cy_pci_dev_id);
273#endif
274
275static void cy_start(struct tty_struct *);
276static void cy_set_line_char(struct cyclades_port *, struct tty_struct *);
277static int cyz_issue_cmd(struct cyclades_card *, __u32, __u8, __u32);
278#ifdef CONFIG_ISA
279static unsigned detect_isa_irq(void __iomem *);
280#endif /* CONFIG_ISA */
281
282#ifndef CONFIG_CYZ_INTR
283static void cyz_poll(unsigned long);
284
285/* The Cyclades-Z polling cycle is defined by this variable */
286static long cyz_polling_cycle = CZ_DEF_POLL;
287
288static DEFINE_TIMER(cyz_timerlist, cyz_poll, 0, 0);
289
290#else /* CONFIG_CYZ_INTR */
291static void cyz_rx_restart(unsigned long);
292static struct timer_list cyz_rx_full_timer[NR_PORTS];
293#endif /* CONFIG_CYZ_INTR */
294
295static inline void cyy_writeb(struct cyclades_port *port, u32 reg, u8 val)
296{
297 struct cyclades_card *card = port->card;
298
299 cy_writeb(port->u.cyy.base_addr + (reg << card->bus_index), val);
300}
301
302static inline u8 cyy_readb(struct cyclades_port *port, u32 reg)
303{
304 struct cyclades_card *card = port->card;
305
306 return readb(port->u.cyy.base_addr + (reg << card->bus_index));
307}
308
309static inline bool cy_is_Z(struct cyclades_card *card)
310{
311 return card->num_chips == (unsigned int)-1;
312}
313
314static inline bool __cyz_fpga_loaded(struct RUNTIME_9060 __iomem *ctl_addr)
315{
316 return readl(&ctl_addr->init_ctrl) & (1 << 17);
317}
318
319static inline bool cyz_fpga_loaded(struct cyclades_card *card)
320{
321 return __cyz_fpga_loaded(card->ctl_addr.p9060);
322}
323
324static inline bool cyz_is_loaded(struct cyclades_card *card)
325{
326 struct FIRM_ID __iomem *fw_id = card->base_addr + ID_ADDRESS;
327
328 return (card->hw_ver == ZO_V1 || cyz_fpga_loaded(card)) &&
329 readl(&fw_id->signature) == ZFIRM_ID;
330}
331
332static inline int serial_paranoia_check(struct cyclades_port *info,
333 const char *name, const char *routine)
334{
335#ifdef SERIAL_PARANOIA_CHECK
336 if (!info) {
337 printk(KERN_WARNING "cyc Warning: null cyclades_port for (%s) "
338 "in %s\n", name, routine);
339 return 1;
340 }
341
342 if (info->magic != CYCLADES_MAGIC) {
343 printk(KERN_WARNING "cyc Warning: bad magic number for serial "
344 "struct (%s) in %s\n", name, routine);
345 return 1;
346 }
347#endif
348 return 0;
349}
350
351/***********************************************************/
352/********* Start of block of Cyclom-Y specific code ********/
353
354/* This routine waits up to 1000 micro-seconds for the previous
355 command to the Cirrus chip to complete and then issues the
356 new command. An error is returned if the previous command
357 didn't finish within the time limit.
358
359 This function is only called from inside spinlock-protected code.
360 */
361static int __cyy_issue_cmd(void __iomem *base_addr, u8 cmd, int index)
362{
363 void __iomem *ccr = base_addr + (CyCCR << index);
364 unsigned int i;
365
366 /* Check to see that the previous command has completed */
367 for (i = 0; i < 100; i++) {
368 if (readb(ccr) == 0)
369 break;
370 udelay(10L);
371 }
372 /* if the CCR never cleared, the previous command
373 didn't finish within the "reasonable time" */
374 if (i == 100)
375 return -1;
376
377 /* Issue the new command */
378 cy_writeb(ccr, cmd);
379
380 return 0;
381}
382
383static inline int cyy_issue_cmd(struct cyclades_port *port, u8 cmd)
384{
385 return __cyy_issue_cmd(port->u.cyy.base_addr, cmd,
386 port->card->bus_index);
387}
388
389#ifdef CONFIG_ISA
390/* ISA interrupt detection code */
391static unsigned detect_isa_irq(void __iomem *address)
392{
393 int irq;
394 unsigned long irqs, flags;
395 int save_xir, save_car;
396 int index = 0; /* IRQ probing is only for ISA */
397
398 /* forget possible initially masked and pending IRQ */
399 irq = probe_irq_off(probe_irq_on());
400
401 /* Clear interrupts on the board first */
402 cy_writeb(address + (Cy_ClrIntr << index), 0);
403 /* Cy_ClrIntr is 0x1800 */
404
405 irqs = probe_irq_on();
406 /* Wait ... */
407 msleep(5);
408
409 /* Enable the Tx interrupts on the CD1400 */
410 local_irq_save(flags);
411 cy_writeb(address + (CyCAR << index), 0);
412 __cyy_issue_cmd(address, CyCHAN_CTL | CyENB_XMTR, index);
413
414 cy_writeb(address + (CyCAR << index), 0);
415 cy_writeb(address + (CySRER << index),
416 readb(address + (CySRER << index)) | CyTxRdy);
417 local_irq_restore(flags);
418
419 /* Wait ... */
420 msleep(5);
421
422 /* Check which interrupt is in use */
423 irq = probe_irq_off(irqs);
424
425 /* Clean up */
426 save_xir = (u_char) readb(address + (CyTIR << index));
427 save_car = readb(address + (CyCAR << index));
428 cy_writeb(address + (CyCAR << index), (save_xir & 0x3));
429 cy_writeb(address + (CySRER << index),
430 readb(address + (CySRER << index)) & ~CyTxRdy);
431 cy_writeb(address + (CyTIR << index), (save_xir & 0x3f));
432 cy_writeb(address + (CyCAR << index), (save_car));
433 cy_writeb(address + (Cy_ClrIntr << index), 0);
434 /* Cy_ClrIntr is 0x1800 */
435
436 return (irq > 0) ? irq : 0;
437}
438#endif /* CONFIG_ISA */
439
440static void cyy_chip_rx(struct cyclades_card *cinfo, int chip,
441 void __iomem *base_addr)
442{
443 struct cyclades_port *info;
444 struct tty_struct *tty;
445 int len, index = cinfo->bus_index;
446 u8 ivr, save_xir, channel, save_car, data, char_count;
447
448#ifdef CY_DEBUG_INTERRUPTS
449 printk(KERN_DEBUG "cyy_interrupt: rcvd intr, chip %d\n", chip);
450#endif
451 /* determine the channel & change to that context */
452 save_xir = readb(base_addr + (CyRIR << index));
453 channel = save_xir & CyIRChannel;
454 info = &cinfo->ports[channel + chip * 4];
455 save_car = cyy_readb(info, CyCAR);
456 cyy_writeb(info, CyCAR, save_xir);
457 ivr = cyy_readb(info, CyRIVR) & CyIVRMask;
458
459 tty = tty_port_tty_get(&info->port);
460 /* if there is nowhere to put the data, discard it */
461 if (tty == NULL) {
462 if (ivr == CyIVRRxEx) { /* exception */
463 data = cyy_readb(info, CyRDSR);
464 } else { /* normal character reception */
465 char_count = cyy_readb(info, CyRDCR);
466 while (char_count--)
467 data = cyy_readb(info, CyRDSR);
468 }
469 goto end;
470 }
471 /* there is an open port for this data */
472 if (ivr == CyIVRRxEx) { /* exception */
473 data = cyy_readb(info, CyRDSR);
474
475 /* For statistics only */
476 if (data & CyBREAK)
477 info->icount.brk++;
478 else if (data & CyFRAME)
479 info->icount.frame++;
480 else if (data & CyPARITY)
481 info->icount.parity++;
482 else if (data & CyOVERRUN)
483 info->icount.overrun++;
484
485 if (data & info->ignore_status_mask) {
486 info->icount.rx++;
487 tty_kref_put(tty);
488 return;
489 }
490 if (tty_buffer_request_room(tty, 1)) {
491 if (data & info->read_status_mask) {
492 if (data & CyBREAK) {
493 tty_insert_flip_char(tty,
494 cyy_readb(info, CyRDSR),
495 TTY_BREAK);
496 info->icount.rx++;
497 if (info->port.flags & ASYNC_SAK)
498 do_SAK(tty);
499 } else if (data & CyFRAME) {
500 tty_insert_flip_char(tty,
501 cyy_readb(info, CyRDSR),
502 TTY_FRAME);
503 info->icount.rx++;
504 info->idle_stats.frame_errs++;
505 } else if (data & CyPARITY) {
506 /* Pieces of seven... */
507 tty_insert_flip_char(tty,
508 cyy_readb(info, CyRDSR),
509 TTY_PARITY);
510 info->icount.rx++;
511 info->idle_stats.parity_errs++;
512 } else if (data & CyOVERRUN) {
513 tty_insert_flip_char(tty, 0,
514 TTY_OVERRUN);
515 info->icount.rx++;
516 /* If the flip buffer itself is
517 overflowing, we still lose
518 the next incoming character.
519 */
520 tty_insert_flip_char(tty,
521 cyy_readb(info, CyRDSR),
522 TTY_FRAME);
523 info->icount.rx++;
524 info->idle_stats.overruns++;
525 /* These two conditions may imply */
526 /* a normal read should be done. */
527 /* } else if(data & CyTIMEOUT) { */
528 /* } else if(data & CySPECHAR) { */
529 } else {
530 tty_insert_flip_char(tty, 0,
531 TTY_NORMAL);
532 info->icount.rx++;
533 }
534 } else {
535 tty_insert_flip_char(tty, 0, TTY_NORMAL);
536 info->icount.rx++;
537 }
538 } else {
539 /* there was a software buffer overrun and nothing
540 * could be done about it!!! */
541 info->icount.buf_overrun++;
542 info->idle_stats.overruns++;
543 }
544 } else { /* normal character reception */
545 /* load # chars available from the chip */
546 char_count = cyy_readb(info, CyRDCR);
547
548#ifdef CY_ENABLE_MONITORING
549 ++info->mon.int_count;
550 info->mon.char_count += char_count;
551 if (char_count > info->mon.char_max)
552 info->mon.char_max = char_count;
553 info->mon.char_last = char_count;
554#endif
555 len = tty_buffer_request_room(tty, char_count);
556 while (len--) {
557 data = cyy_readb(info, CyRDSR);
558 tty_insert_flip_char(tty, data, TTY_NORMAL);
559 info->idle_stats.recv_bytes++;
560 info->icount.rx++;
561#ifdef CY_16Y_HACK
562 udelay(10L);
563#endif
564 }
565 info->idle_stats.recv_idle = jiffies;
566 }
567 tty_schedule_flip(tty);
568 tty_kref_put(tty);
569end:
570 /* end of service */
571 cyy_writeb(info, CyRIR, save_xir & 0x3f);
572 cyy_writeb(info, CyCAR, save_car);
573}
574
575static void cyy_chip_tx(struct cyclades_card *cinfo, unsigned int chip,
576 void __iomem *base_addr)
577{
578 struct cyclades_port *info;
579 struct tty_struct *tty;
580 int char_count, index = cinfo->bus_index;
581 u8 save_xir, channel, save_car, outch;
582
583 /* Since we only get here when the transmit buffer
584 is empty, we know we can always stuff a dozen
585 characters. */
586#ifdef CY_DEBUG_INTERRUPTS
587 printk(KERN_DEBUG "cyy_interrupt: xmit intr, chip %d\n", chip);
588#endif
589
590 /* determine the channel & change to that context */
591 save_xir = readb(base_addr + (CyTIR << index));
592 channel = save_xir & CyIRChannel;
593 save_car = readb(base_addr + (CyCAR << index));
594 cy_writeb(base_addr + (CyCAR << index), save_xir);
595
596 info = &cinfo->ports[channel + chip * 4];
597 tty = tty_port_tty_get(&info->port);
598 if (tty == NULL) {
599 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy);
600 goto end;
601 }
602
603 /* load the on-chip space for outbound data */
604 char_count = info->xmit_fifo_size;
605
606 if (info->x_char) { /* send special char */
607 outch = info->x_char;
608 cyy_writeb(info, CyTDR, outch);
609 char_count--;
610 info->icount.tx++;
611 info->x_char = 0;
612 }
613
614 if (info->breakon || info->breakoff) {
615 if (info->breakon) {
616 cyy_writeb(info, CyTDR, 0);
617 cyy_writeb(info, CyTDR, 0x81);
618 info->breakon = 0;
619 char_count -= 2;
620 }
621 if (info->breakoff) {
622 cyy_writeb(info, CyTDR, 0);
623 cyy_writeb(info, CyTDR, 0x83);
624 info->breakoff = 0;
625 char_count -= 2;
626 }
627 }
628
629 while (char_count-- > 0) {
630 if (!info->xmit_cnt) {
631 if (cyy_readb(info, CySRER) & CyTxMpty) {
632 cyy_writeb(info, CySRER,
633 cyy_readb(info, CySRER) & ~CyTxMpty);
634 } else {
635 cyy_writeb(info, CySRER, CyTxMpty |
636 (cyy_readb(info, CySRER) & ~CyTxRdy));
637 }
638 goto done;
639 }
640 if (info->port.xmit_buf == NULL) {
641 cyy_writeb(info, CySRER,
642 cyy_readb(info, CySRER) & ~CyTxRdy);
643 goto done;
644 }
645 if (tty->stopped || tty->hw_stopped) {
646 cyy_writeb(info, CySRER,
647 cyy_readb(info, CySRER) & ~CyTxRdy);
648 goto done;
649 }
650 /* Because the Embedded Transmit Commands have been enabled,
651 * we must check to see if the escape character, NULL, is being
652 * sent. If it is, we must ensure that there is room for it to
653 * be doubled in the output stream. Therefore we no longer
654 * advance the pointer when the character is fetched, but
655 * rather wait until after the check for a NULL output
656 * character. This is necessary because there may not be room
657 * for the two chars needed to send a NULL.)
658 */
659 outch = info->port.xmit_buf[info->xmit_tail];
660 if (outch) {
661 info->xmit_cnt--;
662 info->xmit_tail = (info->xmit_tail + 1) &
663 (SERIAL_XMIT_SIZE - 1);
664 cyy_writeb(info, CyTDR, outch);
665 info->icount.tx++;
666 } else {
667 if (char_count > 1) {
668 info->xmit_cnt--;
669 info->xmit_tail = (info->xmit_tail + 1) &
670 (SERIAL_XMIT_SIZE - 1);
671 cyy_writeb(info, CyTDR, outch);
672 cyy_writeb(info, CyTDR, 0);
673 info->icount.tx++;
674 char_count--;
675 }
676 }
677 }
678
679done:
680 tty_wakeup(tty);
681 tty_kref_put(tty);
682end:
683 /* end of service */
684 cyy_writeb(info, CyTIR, save_xir & 0x3f);
685 cyy_writeb(info, CyCAR, save_car);
686}
687
688static void cyy_chip_modem(struct cyclades_card *cinfo, int chip,
689 void __iomem *base_addr)
690{
691 struct cyclades_port *info;
692 struct tty_struct *tty;
693 int index = cinfo->bus_index;
694 u8 save_xir, channel, save_car, mdm_change, mdm_status;
695
696 /* determine the channel & change to that context */
697 save_xir = readb(base_addr + (CyMIR << index));
698 channel = save_xir & CyIRChannel;
699 info = &cinfo->ports[channel + chip * 4];
700 save_car = cyy_readb(info, CyCAR);
701 cyy_writeb(info, CyCAR, save_xir);
702
703 mdm_change = cyy_readb(info, CyMISR);
704 mdm_status = cyy_readb(info, CyMSVR1);
705
706 tty = tty_port_tty_get(&info->port);
707 if (!tty)
708 goto end;
709
710 if (mdm_change & CyANY_DELTA) {
711 /* For statistics only */
712 if (mdm_change & CyDCD)
713 info->icount.dcd++;
714 if (mdm_change & CyCTS)
715 info->icount.cts++;
716 if (mdm_change & CyDSR)
717 info->icount.dsr++;
718 if (mdm_change & CyRI)
719 info->icount.rng++;
720
721 wake_up_interruptible(&info->port.delta_msr_wait);
722 }
723
724 if ((mdm_change & CyDCD) && (info->port.flags & ASYNC_CHECK_CD)) {
725 if (mdm_status & CyDCD)
726 wake_up_interruptible(&info->port.open_wait);
727 else
728 tty_hangup(tty);
729 }
730 if ((mdm_change & CyCTS) && (info->port.flags & ASYNC_CTS_FLOW)) {
731 if (tty->hw_stopped) {
732 if (mdm_status & CyCTS) {
733 /* cy_start isn't used
734 because... !!! */
735 tty->hw_stopped = 0;
736 cyy_writeb(info, CySRER,
737 cyy_readb(info, CySRER) | CyTxRdy);
738 tty_wakeup(tty);
739 }
740 } else {
741 if (!(mdm_status & CyCTS)) {
742 /* cy_stop isn't used
743 because ... !!! */
744 tty->hw_stopped = 1;
745 cyy_writeb(info, CySRER,
746 cyy_readb(info, CySRER) & ~CyTxRdy);
747 }
748 }
749 }
750/* if (mdm_change & CyDSR) {
751 }
752 if (mdm_change & CyRI) {
753 }*/
754 tty_kref_put(tty);
755end:
756 /* end of service */
757 cyy_writeb(info, CyMIR, save_xir & 0x3f);
758 cyy_writeb(info, CyCAR, save_car);
759}
760
761/* The real interrupt service routine is called
762 whenever the card wants its hand held--chars
763 received, out buffer empty, modem change, etc.
764 */
765static irqreturn_t cyy_interrupt(int irq, void *dev_id)
766{
767 int status;
768 struct cyclades_card *cinfo = dev_id;
769 void __iomem *base_addr, *card_base_addr;
770 unsigned int chip, too_many, had_work;
771 int index;
772
773 if (unlikely(cinfo == NULL)) {
774#ifdef CY_DEBUG_INTERRUPTS
775 printk(KERN_DEBUG "cyy_interrupt: spurious interrupt %d\n",
776 irq);
777#endif
778 return IRQ_NONE; /* spurious interrupt */
779 }
780
781 card_base_addr = cinfo->base_addr;
782 index = cinfo->bus_index;
783
784 /* card was not initialized yet (e.g. DEBUG_SHIRQ) */
785 if (unlikely(card_base_addr == NULL))
786 return IRQ_HANDLED;
787
788 /* This loop checks all chips in the card. Make a note whenever
789 _any_ chip had some work to do, as this is considered an
790 indication that there will be more to do. Only when no chip
791 has any work does this outermost loop exit.
792 */
793 do {
794 had_work = 0;
795 for (chip = 0; chip < cinfo->num_chips; chip++) {
796 base_addr = cinfo->base_addr +
797 (cy_chip_offset[chip] << index);
798 too_many = 0;
799 while ((status = readb(base_addr +
800 (CySVRR << index))) != 0x00) {
801 had_work++;
802 /* The purpose of the following test is to ensure that
803 no chip can monopolize the driver. This forces the
804 chips to be checked in a round-robin fashion (after
805 draining each of a bunch (1000) of characters).
806 */
807 if (1000 < too_many++)
808 break;
809 spin_lock(&cinfo->card_lock);
810 if (status & CySRReceive) /* rx intr */
811 cyy_chip_rx(cinfo, chip, base_addr);
812 if (status & CySRTransmit) /* tx intr */
813 cyy_chip_tx(cinfo, chip, base_addr);
814 if (status & CySRModem) /* modem intr */
815 cyy_chip_modem(cinfo, chip, base_addr);
816 spin_unlock(&cinfo->card_lock);
817 }
818 }
819 } while (had_work);
820
821 /* clear interrupts */
822 spin_lock(&cinfo->card_lock);
823 cy_writeb(card_base_addr + (Cy_ClrIntr << index), 0);
824 /* Cy_ClrIntr is 0x1800 */
825 spin_unlock(&cinfo->card_lock);
826 return IRQ_HANDLED;
827} /* cyy_interrupt */
828
829static void cyy_change_rts_dtr(struct cyclades_port *info, unsigned int set,
830 unsigned int clear)
831{
832 struct cyclades_card *card = info->card;
833 int channel = info->line - card->first_line;
834 u32 rts, dtr, msvrr, msvrd;
835
836 channel &= 0x03;
837
838 if (info->rtsdtr_inv) {
839 msvrr = CyMSVR2;
840 msvrd = CyMSVR1;
841 rts = CyDTR;
842 dtr = CyRTS;
843 } else {
844 msvrr = CyMSVR1;
845 msvrd = CyMSVR2;
846 rts = CyRTS;
847 dtr = CyDTR;
848 }
849 if (set & TIOCM_RTS) {
850 cyy_writeb(info, CyCAR, channel);
851 cyy_writeb(info, msvrr, rts);
852 }
853 if (clear & TIOCM_RTS) {
854 cyy_writeb(info, CyCAR, channel);
855 cyy_writeb(info, msvrr, ~rts);
856 }
857 if (set & TIOCM_DTR) {
858 cyy_writeb(info, CyCAR, channel);
859 cyy_writeb(info, msvrd, dtr);
860#ifdef CY_DEBUG_DTR
861 printk(KERN_DEBUG "cyc:set_modem_info raising DTR\n");
862 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
863 cyy_readb(info, CyMSVR1),
864 cyy_readb(info, CyMSVR2));
865#endif
866 }
867 if (clear & TIOCM_DTR) {
868 cyy_writeb(info, CyCAR, channel);
869 cyy_writeb(info, msvrd, ~dtr);
870#ifdef CY_DEBUG_DTR
871 printk(KERN_DEBUG "cyc:set_modem_info dropping DTR\n");
872 printk(KERN_DEBUG " status: 0x%x, 0x%x\n",
873 cyy_readb(info, CyMSVR1),
874 cyy_readb(info, CyMSVR2));
875#endif
876 }
877}
878
879/***********************************************************/
880/********* End of block of Cyclom-Y specific code **********/
881/******** Start of block of Cyclades-Z specific code *******/
882/***********************************************************/
883
884static int
885cyz_fetch_msg(struct cyclades_card *cinfo,
886 __u32 *channel, __u8 *cmd, __u32 *param)
887{
888 struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
889 unsigned long loc_doorbell;
890
891 loc_doorbell = readl(&cinfo->ctl_addr.p9060->loc_doorbell);
892 if (loc_doorbell) {
893 *cmd = (char)(0xff & loc_doorbell);
894 *channel = readl(&board_ctrl->fwcmd_channel);
895 *param = (__u32) readl(&board_ctrl->fwcmd_param);
896 cy_writel(&cinfo->ctl_addr.p9060->loc_doorbell, 0xffffffff);
897 return 1;
898 }
899 return 0;
900} /* cyz_fetch_msg */
901
902static int
903cyz_issue_cmd(struct cyclades_card *cinfo,
904 __u32 channel, __u8 cmd, __u32 param)
905{
906 struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
907 __u32 __iomem *pci_doorbell;
908 unsigned int index;
909
910 if (!cyz_is_loaded(cinfo))
911 return -1;
912
913 index = 0;
914 pci_doorbell = &cinfo->ctl_addr.p9060->pci_doorbell;
915 while ((readl(pci_doorbell) & 0xff) != 0) {
916 if (index++ == 1000)
917 return (int)(readl(pci_doorbell) & 0xff);
918 udelay(50L);
919 }
920 cy_writel(&board_ctrl->hcmd_channel, channel);
921 cy_writel(&board_ctrl->hcmd_param, param);
922 cy_writel(pci_doorbell, (long)cmd);
923
924 return 0;
925} /* cyz_issue_cmd */
926
927static void cyz_handle_rx(struct cyclades_port *info, struct tty_struct *tty)
928{
929 struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
930 struct cyclades_card *cinfo = info->card;
931 unsigned int char_count;
932 int len;
933#ifdef BLOCKMOVE
934 unsigned char *buf;
935#else
936 char data;
937#endif
938 __u32 rx_put, rx_get, new_rx_get, rx_bufsize, rx_bufaddr;
939
940 rx_get = new_rx_get = readl(&buf_ctrl->rx_get);
941 rx_put = readl(&buf_ctrl->rx_put);
942 rx_bufsize = readl(&buf_ctrl->rx_bufsize);
943 rx_bufaddr = readl(&buf_ctrl->rx_bufaddr);
944 if (rx_put >= rx_get)
945 char_count = rx_put - rx_get;
946 else
947 char_count = rx_put - rx_get + rx_bufsize;
948
949 if (char_count) {
950#ifdef CY_ENABLE_MONITORING
951 info->mon.int_count++;
952 info->mon.char_count += char_count;
953 if (char_count > info->mon.char_max)
954 info->mon.char_max = char_count;
955 info->mon.char_last = char_count;
956#endif
957 if (tty == NULL) {
958 /* flush received characters */
959 new_rx_get = (new_rx_get + char_count) &
960 (rx_bufsize - 1);
961 info->rflush_count++;
962 } else {
963#ifdef BLOCKMOVE
964 /* we'd like to use memcpy(t, f, n) and memset(s, c, count)
965 for performance, but because of buffer boundaries, there
966 may be several steps to the operation */
967 while (1) {
968 len = tty_prepare_flip_string(tty, &buf,
969 char_count);
970 if (!len)
971 break;
972
973 len = min_t(unsigned int, min(len, char_count),
974 rx_bufsize - new_rx_get);
975
976 memcpy_fromio(buf, cinfo->base_addr +
977 rx_bufaddr + new_rx_get, len);
978
979 new_rx_get = (new_rx_get + len) &
980 (rx_bufsize - 1);
981 char_count -= len;
982 info->icount.rx += len;
983 info->idle_stats.recv_bytes += len;
984 }
985#else
986 len = tty_buffer_request_room(tty, char_count);
987 while (len--) {
988 data = readb(cinfo->base_addr + rx_bufaddr +
989 new_rx_get);
990 new_rx_get = (new_rx_get + 1) &
991 (rx_bufsize - 1);
992 tty_insert_flip_char(tty, data, TTY_NORMAL);
993 info->idle_stats.recv_bytes++;
994 info->icount.rx++;
995 }
996#endif
997#ifdef CONFIG_CYZ_INTR
998 /* Recalculate the number of chars in the RX buffer and issue
999 a cmd in case it's higher than the RX high water mark */
1000 rx_put = readl(&buf_ctrl->rx_put);
1001 if (rx_put >= rx_get)
1002 char_count = rx_put - rx_get;
1003 else
1004 char_count = rx_put - rx_get + rx_bufsize;
1005 if (char_count >= readl(&buf_ctrl->rx_threshold) &&
1006 !timer_pending(&cyz_rx_full_timer[
1007 info->line]))
1008 mod_timer(&cyz_rx_full_timer[info->line],
1009 jiffies + 1);
1010#endif
1011 info->idle_stats.recv_idle = jiffies;
1012 tty_schedule_flip(tty);
1013 }
1014 /* Update rx_get */
1015 cy_writel(&buf_ctrl->rx_get, new_rx_get);
1016 }
1017}
1018
1019static void cyz_handle_tx(struct cyclades_port *info, struct tty_struct *tty)
1020{
1021 struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
1022 struct cyclades_card *cinfo = info->card;
1023 u8 data;
1024 unsigned int char_count;
1025#ifdef BLOCKMOVE
1026 int small_count;
1027#endif
1028 __u32 tx_put, tx_get, tx_bufsize, tx_bufaddr;
1029
1030 if (info->xmit_cnt <= 0) /* Nothing to transmit */
1031 return;
1032
1033 tx_get = readl(&buf_ctrl->tx_get);
1034 tx_put = readl(&buf_ctrl->tx_put);
1035 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1036 tx_bufaddr = readl(&buf_ctrl->tx_bufaddr);
1037 if (tx_put >= tx_get)
1038 char_count = tx_get - tx_put - 1 + tx_bufsize;
1039 else
1040 char_count = tx_get - tx_put - 1;
1041
1042 if (char_count) {
1043
1044 if (tty == NULL)
1045 goto ztxdone;
1046
1047 if (info->x_char) { /* send special char */
1048 data = info->x_char;
1049
1050 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1051 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1052 info->x_char = 0;
1053 char_count--;
1054 info->icount.tx++;
1055 }
1056#ifdef BLOCKMOVE
1057 while (0 < (small_count = min_t(unsigned int,
1058 tx_bufsize - tx_put, min_t(unsigned int,
1059 (SERIAL_XMIT_SIZE - info->xmit_tail),
1060 min_t(unsigned int, info->xmit_cnt,
1061 char_count))))) {
1062
1063 memcpy_toio((char *)(cinfo->base_addr + tx_bufaddr +
1064 tx_put),
1065 &info->port.xmit_buf[info->xmit_tail],
1066 small_count);
1067
1068 tx_put = (tx_put + small_count) & (tx_bufsize - 1);
1069 char_count -= small_count;
1070 info->icount.tx += small_count;
1071 info->xmit_cnt -= small_count;
1072 info->xmit_tail = (info->xmit_tail + small_count) &
1073 (SERIAL_XMIT_SIZE - 1);
1074 }
1075#else
1076 while (info->xmit_cnt && char_count) {
1077 data = info->port.xmit_buf[info->xmit_tail];
1078 info->xmit_cnt--;
1079 info->xmit_tail = (info->xmit_tail + 1) &
1080 (SERIAL_XMIT_SIZE - 1);
1081
1082 cy_writeb(cinfo->base_addr + tx_bufaddr + tx_put, data);
1083 tx_put = (tx_put + 1) & (tx_bufsize - 1);
1084 char_count--;
1085 info->icount.tx++;
1086 }
1087#endif
1088 tty_wakeup(tty);
1089ztxdone:
1090 /* Update tx_put */
1091 cy_writel(&buf_ctrl->tx_put, tx_put);
1092 }
1093}
1094
1095static void cyz_handle_cmd(struct cyclades_card *cinfo)
1096{
1097 struct BOARD_CTRL __iomem *board_ctrl = cinfo->board_ctrl;
1098 struct tty_struct *tty;
1099 struct cyclades_port *info;
1100 __u32 channel, param, fw_ver;
1101 __u8 cmd;
1102 int special_count;
1103 int delta_count;
1104
1105 fw_ver = readl(&board_ctrl->fw_version);
1106
1107 while (cyz_fetch_msg(cinfo, &channel, &cmd, ¶m) == 1) {
1108 special_count = 0;
1109 delta_count = 0;
1110 info = &cinfo->ports[channel];
1111 tty = tty_port_tty_get(&info->port);
1112 if (tty == NULL)
1113 continue;
1114
1115 switch (cmd) {
1116 case C_CM_PR_ERROR:
1117 tty_insert_flip_char(tty, 0, TTY_PARITY);
1118 info->icount.rx++;
1119 special_count++;
1120 break;
1121 case C_CM_FR_ERROR:
1122 tty_insert_flip_char(tty, 0, TTY_FRAME);
1123 info->icount.rx++;
1124 special_count++;
1125 break;
1126 case C_CM_RXBRK:
1127 tty_insert_flip_char(tty, 0, TTY_BREAK);
1128 info->icount.rx++;
1129 special_count++;
1130 break;
1131 case C_CM_MDCD:
1132 info->icount.dcd++;
1133 delta_count++;
1134 if (info->port.flags & ASYNC_CHECK_CD) {
1135 u32 dcd = fw_ver > 241 ? param :
1136 readl(&info->u.cyz.ch_ctrl->rs_status);
1137 if (dcd & C_RS_DCD)
1138 wake_up_interruptible(&info->port.open_wait);
1139 else
1140 tty_hangup(tty);
1141 }
1142 break;
1143 case C_CM_MCTS:
1144 info->icount.cts++;
1145 delta_count++;
1146 break;
1147 case C_CM_MRI:
1148 info->icount.rng++;
1149 delta_count++;
1150 break;
1151 case C_CM_MDSR:
1152 info->icount.dsr++;
1153 delta_count++;
1154 break;
1155#ifdef Z_WAKE
1156 case C_CM_IOCTLW:
1157 complete(&info->shutdown_wait);
1158 break;
1159#endif
1160#ifdef CONFIG_CYZ_INTR
1161 case C_CM_RXHIWM:
1162 case C_CM_RXNNDT:
1163 case C_CM_INTBACK2:
1164 /* Reception Interrupt */
1165#ifdef CY_DEBUG_INTERRUPTS
1166 printk(KERN_DEBUG "cyz_interrupt: rcvd intr, card %d, "
1167 "port %ld\n", info->card, channel);
1168#endif
1169 cyz_handle_rx(info, tty);
1170 break;
1171 case C_CM_TXBEMPTY:
1172 case C_CM_TXLOWWM:
1173 case C_CM_INTBACK:
1174 /* Transmission Interrupt */
1175#ifdef CY_DEBUG_INTERRUPTS
1176 printk(KERN_DEBUG "cyz_interrupt: xmit intr, card %d, "
1177 "port %ld\n", info->card, channel);
1178#endif
1179 cyz_handle_tx(info, tty);
1180 break;
1181#endif /* CONFIG_CYZ_INTR */
1182 case C_CM_FATAL:
1183 /* should do something with this !!! */
1184 break;
1185 default:
1186 break;
1187 }
1188 if (delta_count)
1189 wake_up_interruptible(&info->port.delta_msr_wait);
1190 if (special_count)
1191 tty_schedule_flip(tty);
1192 tty_kref_put(tty);
1193 }
1194}
1195
1196#ifdef CONFIG_CYZ_INTR
1197static irqreturn_t cyz_interrupt(int irq, void *dev_id)
1198{
1199 struct cyclades_card *cinfo = dev_id;
1200
1201 if (unlikely(!cyz_is_loaded(cinfo))) {
1202#ifdef CY_DEBUG_INTERRUPTS
1203 printk(KERN_DEBUG "cyz_interrupt: board not yet loaded "
1204 "(IRQ%d).\n", irq);
1205#endif
1206 return IRQ_NONE;
1207 }
1208
1209 /* Handle the interrupts */
1210 cyz_handle_cmd(cinfo);
1211
1212 return IRQ_HANDLED;
1213} /* cyz_interrupt */
1214
1215static void cyz_rx_restart(unsigned long arg)
1216{
1217 struct cyclades_port *info = (struct cyclades_port *)arg;
1218 struct cyclades_card *card = info->card;
1219 int retval;
1220 __u32 channel = info->line - card->first_line;
1221 unsigned long flags;
1222
1223 spin_lock_irqsave(&card->card_lock, flags);
1224 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK2, 0L);
1225 if (retval != 0) {
1226 printk(KERN_ERR "cyc:cyz_rx_restart retval on ttyC%d was %x\n",
1227 info->line, retval);
1228 }
1229 spin_unlock_irqrestore(&card->card_lock, flags);
1230}
1231
1232#else /* CONFIG_CYZ_INTR */
1233
1234static void cyz_poll(unsigned long arg)
1235{
1236 struct cyclades_card *cinfo;
1237 struct cyclades_port *info;
1238 unsigned long expires = jiffies + HZ;
1239 unsigned int port, card;
1240
1241 for (card = 0; card < NR_CARDS; card++) {
1242 cinfo = &cy_card[card];
1243
1244 if (!cy_is_Z(cinfo))
1245 continue;
1246 if (!cyz_is_loaded(cinfo))
1247 continue;
1248
1249 /* Skip first polling cycle to avoid racing conditions with the FW */
1250 if (!cinfo->intr_enabled) {
1251 cinfo->intr_enabled = 1;
1252 continue;
1253 }
1254
1255 cyz_handle_cmd(cinfo);
1256
1257 for (port = 0; port < cinfo->nports; port++) {
1258 struct tty_struct *tty;
1259
1260 info = &cinfo->ports[port];
1261 tty = tty_port_tty_get(&info->port);
1262 /* OK to pass NULL to the handle functions below.
1263 They need to drop the data in that case. */
1264
1265 if (!info->throttle)
1266 cyz_handle_rx(info, tty);
1267 cyz_handle_tx(info, tty);
1268 tty_kref_put(tty);
1269 }
1270 /* poll every 'cyz_polling_cycle' period */
1271 expires = jiffies + cyz_polling_cycle;
1272 }
1273 mod_timer(&cyz_timerlist, expires);
1274} /* cyz_poll */
1275
1276#endif /* CONFIG_CYZ_INTR */
1277
1278/********** End of block of Cyclades-Z specific code *********/
1279/***********************************************************/
1280
1281/* This is called whenever a port becomes active;
1282 interrupts are enabled and DTR & RTS are turned on.
1283 */
1284static int cy_startup(struct cyclades_port *info, struct tty_struct *tty)
1285{
1286 struct cyclades_card *card;
1287 unsigned long flags;
1288 int retval = 0;
1289 int channel;
1290 unsigned long page;
1291
1292 card = info->card;
1293 channel = info->line - card->first_line;
1294
1295 page = get_zeroed_page(GFP_KERNEL);
1296 if (!page)
1297 return -ENOMEM;
1298
1299 spin_lock_irqsave(&card->card_lock, flags);
1300
1301 if (info->port.flags & ASYNC_INITIALIZED)
1302 goto errout;
1303
1304 if (!info->type) {
1305 set_bit(TTY_IO_ERROR, &tty->flags);
1306 goto errout;
1307 }
1308
1309 if (info->port.xmit_buf)
1310 free_page(page);
1311 else
1312 info->port.xmit_buf = (unsigned char *)page;
1313
1314 spin_unlock_irqrestore(&card->card_lock, flags);
1315
1316 cy_set_line_char(info, tty);
1317
1318 if (!cy_is_Z(card)) {
1319 channel &= 0x03;
1320
1321 spin_lock_irqsave(&card->card_lock, flags);
1322
1323 cyy_writeb(info, CyCAR, channel);
1324
1325 cyy_writeb(info, CyRTPR,
1326 (info->default_timeout ? info->default_timeout : 0x02));
1327 /* 10ms rx timeout */
1328
1329 cyy_issue_cmd(info, CyCHAN_CTL | CyENB_RCVR | CyENB_XMTR);
1330
1331 cyy_change_rts_dtr(info, TIOCM_RTS | TIOCM_DTR, 0);
1332
1333 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyRxData);
1334 } else {
1335 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
1336
1337 if (!cyz_is_loaded(card))
1338 return -ENODEV;
1339
1340#ifdef CY_DEBUG_OPEN
1341 printk(KERN_DEBUG "cyc startup Z card %d, channel %d, "
1342 "base_addr %p\n", card, channel, card->base_addr);
1343#endif
1344 spin_lock_irqsave(&card->card_lock, flags);
1345
1346 cy_writel(&ch_ctrl->op_mode, C_CH_ENABLE);
1347#ifdef Z_WAKE
1348#ifdef CONFIG_CYZ_INTR
1349 cy_writel(&ch_ctrl->intr_enable,
1350 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1351 C_IN_RXNNDT | C_IN_IOCTLW | C_IN_MDCD);
1352#else
1353 cy_writel(&ch_ctrl->intr_enable,
1354 C_IN_IOCTLW | C_IN_MDCD);
1355#endif /* CONFIG_CYZ_INTR */
1356#else
1357#ifdef CONFIG_CYZ_INTR
1358 cy_writel(&ch_ctrl->intr_enable,
1359 C_IN_TXBEMPTY | C_IN_TXLOWWM | C_IN_RXHIWM |
1360 C_IN_RXNNDT | C_IN_MDCD);
1361#else
1362 cy_writel(&ch_ctrl->intr_enable, C_IN_MDCD);
1363#endif /* CONFIG_CYZ_INTR */
1364#endif /* Z_WAKE */
1365
1366 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
1367 if (retval != 0) {
1368 printk(KERN_ERR "cyc:startup(1) retval on ttyC%d was "
1369 "%x\n", info->line, retval);
1370 }
1371
1372 /* Flush RX buffers before raising DTR and RTS */
1373 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_RX, 0L);
1374 if (retval != 0) {
1375 printk(KERN_ERR "cyc:startup(2) retval on ttyC%d was "
1376 "%x\n", info->line, retval);
1377 }
1378
1379 /* set timeout !!! */
1380 /* set RTS and DTR !!! */
1381 tty_port_raise_dtr_rts(&info->port);
1382
1383 /* enable send, recv, modem !!! */
1384 }
1385
1386 info->port.flags |= ASYNC_INITIALIZED;
1387
1388 clear_bit(TTY_IO_ERROR, &tty->flags);
1389 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1390 info->breakon = info->breakoff = 0;
1391 memset((char *)&info->idle_stats, 0, sizeof(info->idle_stats));
1392 info->idle_stats.in_use =
1393 info->idle_stats.recv_idle =
1394 info->idle_stats.xmit_idle = jiffies;
1395
1396 spin_unlock_irqrestore(&card->card_lock, flags);
1397
1398#ifdef CY_DEBUG_OPEN
1399 printk(KERN_DEBUG "cyc startup done\n");
1400#endif
1401 return 0;
1402
1403errout:
1404 spin_unlock_irqrestore(&card->card_lock, flags);
1405 free_page(page);
1406 return retval;
1407} /* startup */
1408
1409static void start_xmit(struct cyclades_port *info)
1410{
1411 struct cyclades_card *card = info->card;
1412 unsigned long flags;
1413 int channel = info->line - card->first_line;
1414
1415 if (!cy_is_Z(card)) {
1416 spin_lock_irqsave(&card->card_lock, flags);
1417 cyy_writeb(info, CyCAR, channel & 0x03);
1418 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy);
1419 spin_unlock_irqrestore(&card->card_lock, flags);
1420 } else {
1421#ifdef CONFIG_CYZ_INTR
1422 int retval;
1423
1424 spin_lock_irqsave(&card->card_lock, flags);
1425 retval = cyz_issue_cmd(card, channel, C_CM_INTBACK, 0L);
1426 if (retval != 0) {
1427 printk(KERN_ERR "cyc:start_xmit retval on ttyC%d was "
1428 "%x\n", info->line, retval);
1429 }
1430 spin_unlock_irqrestore(&card->card_lock, flags);
1431#else /* CONFIG_CYZ_INTR */
1432 /* Don't have to do anything at this time */
1433#endif /* CONFIG_CYZ_INTR */
1434 }
1435} /* start_xmit */
1436
1437/*
1438 * This routine shuts down a serial port; interrupts are disabled,
1439 * and DTR is dropped if the hangup on close termio flag is on.
1440 */
1441static void cy_shutdown(struct cyclades_port *info, struct tty_struct *tty)
1442{
1443 struct cyclades_card *card;
1444 unsigned long flags;
1445
1446 if (!(info->port.flags & ASYNC_INITIALIZED))
1447 return;
1448
1449 card = info->card;
1450 if (!cy_is_Z(card)) {
1451 spin_lock_irqsave(&card->card_lock, flags);
1452
1453 /* Clear delta_msr_wait queue to avoid mem leaks. */
1454 wake_up_interruptible(&info->port.delta_msr_wait);
1455
1456 if (info->port.xmit_buf) {
1457 unsigned char *temp;
1458 temp = info->port.xmit_buf;
1459 info->port.xmit_buf = NULL;
1460 free_page((unsigned long)temp);
1461 }
1462 if (tty->termios->c_cflag & HUPCL)
1463 cyy_change_rts_dtr(info, 0, TIOCM_RTS | TIOCM_DTR);
1464
1465 cyy_issue_cmd(info, CyCHAN_CTL | CyDIS_RCVR);
1466 /* it may be appropriate to clear _XMIT at
1467 some later date (after testing)!!! */
1468
1469 set_bit(TTY_IO_ERROR, &tty->flags);
1470 info->port.flags &= ~ASYNC_INITIALIZED;
1471 spin_unlock_irqrestore(&card->card_lock, flags);
1472 } else {
1473#ifdef CY_DEBUG_OPEN
1474 int channel = info->line - card->first_line;
1475 printk(KERN_DEBUG "cyc shutdown Z card %d, channel %d, "
1476 "base_addr %p\n", card, channel, card->base_addr);
1477#endif
1478
1479 if (!cyz_is_loaded(card))
1480 return;
1481
1482 spin_lock_irqsave(&card->card_lock, flags);
1483
1484 if (info->port.xmit_buf) {
1485 unsigned char *temp;
1486 temp = info->port.xmit_buf;
1487 info->port.xmit_buf = NULL;
1488 free_page((unsigned long)temp);
1489 }
1490
1491 if (tty->termios->c_cflag & HUPCL)
1492 tty_port_lower_dtr_rts(&info->port);
1493
1494 set_bit(TTY_IO_ERROR, &tty->flags);
1495 info->port.flags &= ~ASYNC_INITIALIZED;
1496
1497 spin_unlock_irqrestore(&card->card_lock, flags);
1498 }
1499
1500#ifdef CY_DEBUG_OPEN
1501 printk(KERN_DEBUG "cyc shutdown done\n");
1502#endif
1503} /* shutdown */
1504
1505/*
1506 * ------------------------------------------------------------
1507 * cy_open() and friends
1508 * ------------------------------------------------------------
1509 */
1510
1511/*
1512 * This routine is called whenever a serial port is opened. It
1513 * performs the serial-specific initialization for the tty structure.
1514 */
1515static int cy_open(struct tty_struct *tty, struct file *filp)
1516{
1517 struct cyclades_port *info;
1518 unsigned int i, line = tty->index;
1519 int retval;
1520
1521 for (i = 0; i < NR_CARDS; i++)
1522 if (line < cy_card[i].first_line + cy_card[i].nports &&
1523 line >= cy_card[i].first_line)
1524 break;
1525 if (i >= NR_CARDS)
1526 return -ENODEV;
1527 info = &cy_card[i].ports[line - cy_card[i].first_line];
1528 if (info->line < 0)
1529 return -ENODEV;
1530
1531 /* If the card's firmware hasn't been loaded,
1532 treat it as absent from the system. This
1533 will make the user pay attention.
1534 */
1535 if (cy_is_Z(info->card)) {
1536 struct cyclades_card *cinfo = info->card;
1537 struct FIRM_ID __iomem *firm_id = cinfo->base_addr + ID_ADDRESS;
1538
1539 if (!cyz_is_loaded(cinfo)) {
1540 if (cinfo->hw_ver == ZE_V1 && cyz_fpga_loaded(cinfo) &&
1541 readl(&firm_id->signature) ==
1542 ZFIRM_HLT) {
1543 printk(KERN_ERR "cyc:Cyclades-Z Error: you "
1544 "need an external power supply for "
1545 "this number of ports.\nFirmware "
1546 "halted.\n");
1547 } else {
1548 printk(KERN_ERR "cyc:Cyclades-Z firmware not "
1549 "yet loaded\n");
1550 }
1551 return -ENODEV;
1552 }
1553#ifdef CONFIG_CYZ_INTR
1554 else {
1555 /* In case this Z board is operating in interrupt mode, its
1556 interrupts should be enabled as soon as the first open
1557 happens to one of its ports. */
1558 if (!cinfo->intr_enabled) {
1559 u16 intr;
1560
1561 /* Enable interrupts on the PLX chip */
1562 intr = readw(&cinfo->ctl_addr.p9060->
1563 intr_ctrl_stat) | 0x0900;
1564 cy_writew(&cinfo->ctl_addr.p9060->
1565 intr_ctrl_stat, intr);
1566 /* Enable interrupts on the FW */
1567 retval = cyz_issue_cmd(cinfo, 0,
1568 C_CM_IRQ_ENBL, 0L);
1569 if (retval != 0) {
1570 printk(KERN_ERR "cyc:IRQ enable retval "
1571 "was %x\n", retval);
1572 }
1573 cinfo->intr_enabled = 1;
1574 }
1575 }
1576#endif /* CONFIG_CYZ_INTR */
1577 /* Make sure this Z port really exists in hardware */
1578 if (info->line > (cinfo->first_line + cinfo->nports - 1))
1579 return -ENODEV;
1580 }
1581#ifdef CY_DEBUG_OTHER
1582 printk(KERN_DEBUG "cyc:cy_open ttyC%d\n", info->line);
1583#endif
1584 tty->driver_data = info;
1585 if (serial_paranoia_check(info, tty->name, "cy_open"))
1586 return -ENODEV;
1587
1588#ifdef CY_DEBUG_OPEN
1589 printk(KERN_DEBUG "cyc:cy_open ttyC%d, count = %d\n", info->line,
1590 info->port.count);
1591#endif
1592 info->port.count++;
1593#ifdef CY_DEBUG_COUNT
1594 printk(KERN_DEBUG "cyc:cy_open (%d): incrementing count to %d\n",
1595 current->pid, info->port.count);
1596#endif
1597
1598 /*
1599 * If the port is the middle of closing, bail out now
1600 */
1601 if (tty_hung_up_p(filp) || (info->port.flags & ASYNC_CLOSING)) {
1602 wait_event_interruptible_tty(info->port.close_wait,
1603 !(info->port.flags & ASYNC_CLOSING));
1604 return (info->port.flags & ASYNC_HUP_NOTIFY) ? -EAGAIN: -ERESTARTSYS;
1605 }
1606
1607 /*
1608 * Start up serial port
1609 */
1610 retval = cy_startup(info, tty);
1611 if (retval)
1612 return retval;
1613
1614 retval = tty_port_block_til_ready(&info->port, tty, filp);
1615 if (retval) {
1616#ifdef CY_DEBUG_OPEN
1617 printk(KERN_DEBUG "cyc:cy_open returning after block_til_ready "
1618 "with %d\n", retval);
1619#endif
1620 return retval;
1621 }
1622
1623 info->throttle = 0;
1624 tty_port_tty_set(&info->port, tty);
1625
1626#ifdef CY_DEBUG_OPEN
1627 printk(KERN_DEBUG "cyc:cy_open done\n");
1628#endif
1629 return 0;
1630} /* cy_open */
1631
1632/*
1633 * cy_wait_until_sent() --- wait until the transmitter is empty
1634 */
1635static void cy_wait_until_sent(struct tty_struct *tty, int timeout)
1636{
1637 struct cyclades_card *card;
1638 struct cyclades_port *info = tty->driver_data;
1639 unsigned long orig_jiffies;
1640 int char_time;
1641
1642 if (serial_paranoia_check(info, tty->name, "cy_wait_until_sent"))
1643 return;
1644
1645 if (info->xmit_fifo_size == 0)
1646 return; /* Just in case.... */
1647
1648 orig_jiffies = jiffies;
1649 /*
1650 * Set the check interval to be 1/5 of the estimated time to
1651 * send a single character, and make it at least 1. The check
1652 * interval should also be less than the timeout.
1653 *
1654 * Note: we have to use pretty tight timings here to satisfy
1655 * the NIST-PCTS.
1656 */
1657 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1658 char_time = char_time / 5;
1659 if (char_time <= 0)
1660 char_time = 1;
1661 if (timeout < 0)
1662 timeout = 0;
1663 if (timeout)
1664 char_time = min(char_time, timeout);
1665 /*
1666 * If the transmitter hasn't cleared in twice the approximate
1667 * amount of time to send the entire FIFO, it probably won't
1668 * ever clear. This assumes the UART isn't doing flow
1669 * control, which is currently the case. Hence, if it ever
1670 * takes longer than info->timeout, this is probably due to a
1671 * UART bug of some kind. So, we clamp the timeout parameter at
1672 * 2*info->timeout.
1673 */
1674 if (!timeout || timeout > 2 * info->timeout)
1675 timeout = 2 * info->timeout;
1676
1677 card = info->card;
1678 if (!cy_is_Z(card)) {
1679 while (cyy_readb(info, CySRER) & CyTxRdy) {
1680 if (msleep_interruptible(jiffies_to_msecs(char_time)))
1681 break;
1682 if (timeout && time_after(jiffies, orig_jiffies +
1683 timeout))
1684 break;
1685 }
1686 }
1687 /* Run one more char cycle */
1688 msleep_interruptible(jiffies_to_msecs(char_time * 5));
1689}
1690
1691static void cy_flush_buffer(struct tty_struct *tty)
1692{
1693 struct cyclades_port *info = tty->driver_data;
1694 struct cyclades_card *card;
1695 int channel, retval;
1696 unsigned long flags;
1697
1698#ifdef CY_DEBUG_IO
1699 printk(KERN_DEBUG "cyc:cy_flush_buffer ttyC%d\n", info->line);
1700#endif
1701
1702 if (serial_paranoia_check(info, tty->name, "cy_flush_buffer"))
1703 return;
1704
1705 card = info->card;
1706 channel = info->line - card->first_line;
1707
1708 spin_lock_irqsave(&card->card_lock, flags);
1709 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1710 spin_unlock_irqrestore(&card->card_lock, flags);
1711
1712 if (cy_is_Z(card)) { /* If it is a Z card, flush the on-board
1713 buffers as well */
1714 spin_lock_irqsave(&card->card_lock, flags);
1715 retval = cyz_issue_cmd(card, channel, C_CM_FLUSH_TX, 0L);
1716 if (retval != 0) {
1717 printk(KERN_ERR "cyc: flush_buffer retval on ttyC%d "
1718 "was %x\n", info->line, retval);
1719 }
1720 spin_unlock_irqrestore(&card->card_lock, flags);
1721 }
1722 tty_wakeup(tty);
1723} /* cy_flush_buffer */
1724
1725
1726static void cy_do_close(struct tty_port *port)
1727{
1728 struct cyclades_port *info = container_of(port, struct cyclades_port,
1729 port);
1730 struct cyclades_card *card;
1731 unsigned long flags;
1732 int channel;
1733
1734 card = info->card;
1735 channel = info->line - card->first_line;
1736 spin_lock_irqsave(&card->card_lock, flags);
1737
1738 if (!cy_is_Z(card)) {
1739 /* Stop accepting input */
1740 cyy_writeb(info, CyCAR, channel & 0x03);
1741 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyRxData);
1742 if (info->port.flags & ASYNC_INITIALIZED) {
1743 /* Waiting for on-board buffers to be empty before
1744 closing the port */
1745 spin_unlock_irqrestore(&card->card_lock, flags);
1746 cy_wait_until_sent(port->tty, info->timeout);
1747 spin_lock_irqsave(&card->card_lock, flags);
1748 }
1749 } else {
1750#ifdef Z_WAKE
1751 /* Waiting for on-board buffers to be empty before closing
1752 the port */
1753 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
1754 int retval;
1755
1756 if (readl(&ch_ctrl->flow_status) != C_FS_TXIDLE) {
1757 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLW, 0L);
1758 if (retval != 0) {
1759 printk(KERN_DEBUG "cyc:cy_close retval on "
1760 "ttyC%d was %x\n", info->line, retval);
1761 }
1762 spin_unlock_irqrestore(&card->card_lock, flags);
1763 wait_for_completion_interruptible(&info->shutdown_wait);
1764 spin_lock_irqsave(&card->card_lock, flags);
1765 }
1766#endif
1767 }
1768 spin_unlock_irqrestore(&card->card_lock, flags);
1769 cy_shutdown(info, port->tty);
1770}
1771
1772/*
1773 * This routine is called when a particular tty device is closed.
1774 */
1775static void cy_close(struct tty_struct *tty, struct file *filp)
1776{
1777 struct cyclades_port *info = tty->driver_data;
1778 if (!info || serial_paranoia_check(info, tty->name, "cy_close"))
1779 return;
1780 tty_port_close(&info->port, tty, filp);
1781} /* cy_close */
1782
1783/* This routine gets called when tty_write has put something into
1784 * the write_queue. The characters may come from user space or
1785 * kernel space.
1786 *
1787 * This routine will return the number of characters actually
1788 * accepted for writing.
1789 *
1790 * If the port is not already transmitting stuff, start it off by
1791 * enabling interrupts. The interrupt service routine will then
1792 * ensure that the characters are sent.
1793 * If the port is already active, there is no need to kick it.
1794 *
1795 */
1796static int cy_write(struct tty_struct *tty, const unsigned char *buf, int count)
1797{
1798 struct cyclades_port *info = tty->driver_data;
1799 unsigned long flags;
1800 int c, ret = 0;
1801
1802#ifdef CY_DEBUG_IO
1803 printk(KERN_DEBUG "cyc:cy_write ttyC%d\n", info->line);
1804#endif
1805
1806 if (serial_paranoia_check(info, tty->name, "cy_write"))
1807 return 0;
1808
1809 if (!info->port.xmit_buf)
1810 return 0;
1811
1812 spin_lock_irqsave(&info->card->card_lock, flags);
1813 while (1) {
1814 c = min(count, (int)(SERIAL_XMIT_SIZE - info->xmit_cnt - 1));
1815 c = min(c, (int)(SERIAL_XMIT_SIZE - info->xmit_head));
1816
1817 if (c <= 0)
1818 break;
1819
1820 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
1821 info->xmit_head = (info->xmit_head + c) &
1822 (SERIAL_XMIT_SIZE - 1);
1823 info->xmit_cnt += c;
1824 buf += c;
1825 count -= c;
1826 ret += c;
1827 }
1828 spin_unlock_irqrestore(&info->card->card_lock, flags);
1829
1830 info->idle_stats.xmit_bytes += ret;
1831 info->idle_stats.xmit_idle = jiffies;
1832
1833 if (info->xmit_cnt && !tty->stopped && !tty->hw_stopped)
1834 start_xmit(info);
1835
1836 return ret;
1837} /* cy_write */
1838
1839/*
1840 * This routine is called by the kernel to write a single
1841 * character to the tty device. If the kernel uses this routine,
1842 * it must call the flush_chars() routine (if defined) when it is
1843 * done stuffing characters into the driver. If there is no room
1844 * in the queue, the character is ignored.
1845 */
1846static int cy_put_char(struct tty_struct *tty, unsigned char ch)
1847{
1848 struct cyclades_port *info = tty->driver_data;
1849 unsigned long flags;
1850
1851#ifdef CY_DEBUG_IO
1852 printk(KERN_DEBUG "cyc:cy_put_char ttyC%d\n", info->line);
1853#endif
1854
1855 if (serial_paranoia_check(info, tty->name, "cy_put_char"))
1856 return 0;
1857
1858 if (!info->port.xmit_buf)
1859 return 0;
1860
1861 spin_lock_irqsave(&info->card->card_lock, flags);
1862 if (info->xmit_cnt >= (int)(SERIAL_XMIT_SIZE - 1)) {
1863 spin_unlock_irqrestore(&info->card->card_lock, flags);
1864 return 0;
1865 }
1866
1867 info->port.xmit_buf[info->xmit_head++] = ch;
1868 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1869 info->xmit_cnt++;
1870 info->idle_stats.xmit_bytes++;
1871 info->idle_stats.xmit_idle = jiffies;
1872 spin_unlock_irqrestore(&info->card->card_lock, flags);
1873 return 1;
1874} /* cy_put_char */
1875
1876/*
1877 * This routine is called by the kernel after it has written a
1878 * series of characters to the tty device using put_char().
1879 */
1880static void cy_flush_chars(struct tty_struct *tty)
1881{
1882 struct cyclades_port *info = tty->driver_data;
1883
1884#ifdef CY_DEBUG_IO
1885 printk(KERN_DEBUG "cyc:cy_flush_chars ttyC%d\n", info->line);
1886#endif
1887
1888 if (serial_paranoia_check(info, tty->name, "cy_flush_chars"))
1889 return;
1890
1891 if (info->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped ||
1892 !info->port.xmit_buf)
1893 return;
1894
1895 start_xmit(info);
1896} /* cy_flush_chars */
1897
1898/*
1899 * This routine returns the numbers of characters the tty driver
1900 * will accept for queuing to be written. This number is subject
1901 * to change as output buffers get emptied, or if the output flow
1902 * control is activated.
1903 */
1904static int cy_write_room(struct tty_struct *tty)
1905{
1906 struct cyclades_port *info = tty->driver_data;
1907 int ret;
1908
1909#ifdef CY_DEBUG_IO
1910 printk(KERN_DEBUG "cyc:cy_write_room ttyC%d\n", info->line);
1911#endif
1912
1913 if (serial_paranoia_check(info, tty->name, "cy_write_room"))
1914 return 0;
1915 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1916 if (ret < 0)
1917 ret = 0;
1918 return ret;
1919} /* cy_write_room */
1920
1921static int cy_chars_in_buffer(struct tty_struct *tty)
1922{
1923 struct cyclades_port *info = tty->driver_data;
1924
1925 if (serial_paranoia_check(info, tty->name, "cy_chars_in_buffer"))
1926 return 0;
1927
1928#ifdef Z_EXT_CHARS_IN_BUFFER
1929 if (!cy_is_Z(info->card)) {
1930#endif /* Z_EXT_CHARS_IN_BUFFER */
1931#ifdef CY_DEBUG_IO
1932 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
1933 info->line, info->xmit_cnt);
1934#endif
1935 return info->xmit_cnt;
1936#ifdef Z_EXT_CHARS_IN_BUFFER
1937 } else {
1938 struct BUF_CTRL __iomem *buf_ctrl = info->u.cyz.buf_ctrl;
1939 int char_count;
1940 __u32 tx_put, tx_get, tx_bufsize;
1941
1942 tx_get = readl(&buf_ctrl->tx_get);
1943 tx_put = readl(&buf_ctrl->tx_put);
1944 tx_bufsize = readl(&buf_ctrl->tx_bufsize);
1945 if (tx_put >= tx_get)
1946 char_count = tx_put - tx_get;
1947 else
1948 char_count = tx_put - tx_get + tx_bufsize;
1949#ifdef CY_DEBUG_IO
1950 printk(KERN_DEBUG "cyc:cy_chars_in_buffer ttyC%d %d\n",
1951 info->line, info->xmit_cnt + char_count);
1952#endif
1953 return info->xmit_cnt + char_count;
1954 }
1955#endif /* Z_EXT_CHARS_IN_BUFFER */
1956} /* cy_chars_in_buffer */
1957
1958/*
1959 * ------------------------------------------------------------
1960 * cy_ioctl() and friends
1961 * ------------------------------------------------------------
1962 */
1963
1964static void cyy_baud_calc(struct cyclades_port *info, __u32 baud)
1965{
1966 int co, co_val, bpr;
1967 __u32 cy_clock = ((info->chip_rev >= CD1400_REV_J) ? 60000000 :
1968 25000000);
1969
1970 if (baud == 0) {
1971 info->tbpr = info->tco = info->rbpr = info->rco = 0;
1972 return;
1973 }
1974
1975 /* determine which prescaler to use */
1976 for (co = 4, co_val = 2048; co; co--, co_val >>= 2) {
1977 if (cy_clock / co_val / baud > 63)
1978 break;
1979 }
1980
1981 bpr = (cy_clock / co_val * 2 / baud + 1) / 2;
1982 if (bpr > 255)
1983 bpr = 255;
1984
1985 info->tbpr = info->rbpr = bpr;
1986 info->tco = info->rco = co;
1987}
1988
1989/*
1990 * This routine finds or computes the various line characteristics.
1991 * It used to be called config_setup
1992 */
1993static void cy_set_line_char(struct cyclades_port *info, struct tty_struct *tty)
1994{
1995 struct cyclades_card *card;
1996 unsigned long flags;
1997 int channel;
1998 unsigned cflag, iflag;
1999 int baud, baud_rate = 0;
2000 int i;
2001
2002 if (!tty->termios) /* XXX can this happen at all? */
2003 return;
2004
2005 if (info->line == -1)
2006 return;
2007
2008 cflag = tty->termios->c_cflag;
2009 iflag = tty->termios->c_iflag;
2010
2011 /*
2012 * Set up the tty->alt_speed kludge
2013 */
2014 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2015 tty->alt_speed = 57600;
2016 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2017 tty->alt_speed = 115200;
2018 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2019 tty->alt_speed = 230400;
2020 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2021 tty->alt_speed = 460800;
2022
2023 card = info->card;
2024 channel = info->line - card->first_line;
2025
2026 if (!cy_is_Z(card)) {
2027 u32 cflags;
2028
2029 /* baud rate */
2030 baud = tty_get_baud_rate(tty);
2031 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
2032 ASYNC_SPD_CUST) {
2033 if (info->custom_divisor)
2034 baud_rate = info->baud / info->custom_divisor;
2035 else
2036 baud_rate = info->baud;
2037 } else if (baud > CD1400_MAX_SPEED) {
2038 baud = CD1400_MAX_SPEED;
2039 }
2040 /* find the baud index */
2041 for (i = 0; i < 20; i++) {
2042 if (baud == baud_table[i])
2043 break;
2044 }
2045 if (i == 20)
2046 i = 19; /* CD1400_MAX_SPEED */
2047
2048 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
2049 ASYNC_SPD_CUST) {
2050 cyy_baud_calc(info, baud_rate);
2051 } else {
2052 if (info->chip_rev >= CD1400_REV_J) {
2053 /* It is a CD1400 rev. J or later */
2054 info->tbpr = baud_bpr_60[i]; /* Tx BPR */
2055 info->tco = baud_co_60[i]; /* Tx CO */
2056 info->rbpr = baud_bpr_60[i]; /* Rx BPR */
2057 info->rco = baud_co_60[i]; /* Rx CO */
2058 } else {
2059 info->tbpr = baud_bpr_25[i]; /* Tx BPR */
2060 info->tco = baud_co_25[i]; /* Tx CO */
2061 info->rbpr = baud_bpr_25[i]; /* Rx BPR */
2062 info->rco = baud_co_25[i]; /* Rx CO */
2063 }
2064 }
2065 if (baud_table[i] == 134) {
2066 /* get it right for 134.5 baud */
2067 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
2068 2;
2069 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
2070 ASYNC_SPD_CUST) {
2071 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2072 baud_rate) + 2;
2073 } else if (baud_table[i]) {
2074 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2075 baud_table[i]) + 2;
2076 /* this needs to be propagated into the card info */
2077 } else {
2078 info->timeout = 0;
2079 }
2080 /* By tradition (is it a standard?) a baud rate of zero
2081 implies the line should be/has been closed. A bit
2082 later in this routine such a test is performed. */
2083
2084 /* byte size and parity */
2085 info->cor5 = 0;
2086 info->cor4 = 0;
2087 /* receive threshold */
2088 info->cor3 = (info->default_threshold ?
2089 info->default_threshold : baud_cor3[i]);
2090 info->cor2 = CyETC;
2091 switch (cflag & CSIZE) {
2092 case CS5:
2093 info->cor1 = Cy_5_BITS;
2094 break;
2095 case CS6:
2096 info->cor1 = Cy_6_BITS;
2097 break;
2098 case CS7:
2099 info->cor1 = Cy_7_BITS;
2100 break;
2101 case CS8:
2102 info->cor1 = Cy_8_BITS;
2103 break;
2104 }
2105 if (cflag & CSTOPB)
2106 info->cor1 |= Cy_2_STOP;
2107
2108 if (cflag & PARENB) {
2109 if (cflag & PARODD)
2110 info->cor1 |= CyPARITY_O;
2111 else
2112 info->cor1 |= CyPARITY_E;
2113 } else
2114 info->cor1 |= CyPARITY_NONE;
2115
2116 /* CTS flow control flag */
2117 if (cflag & CRTSCTS) {
2118 info->port.flags |= ASYNC_CTS_FLOW;
2119 info->cor2 |= CyCtsAE;
2120 } else {
2121 info->port.flags &= ~ASYNC_CTS_FLOW;
2122 info->cor2 &= ~CyCtsAE;
2123 }
2124 if (cflag & CLOCAL)
2125 info->port.flags &= ~ASYNC_CHECK_CD;
2126 else
2127 info->port.flags |= ASYNC_CHECK_CD;
2128
2129 /***********************************************
2130 The hardware option, CyRtsAO, presents RTS when
2131 the chip has characters to send. Since most modems
2132 use RTS as reverse (inbound) flow control, this
2133 option is not used. If inbound flow control is
2134 necessary, DTR can be programmed to provide the
2135 appropriate signals for use with a non-standard
2136 cable. Contact Marcio Saito for details.
2137 ***********************************************/
2138
2139 channel &= 0x03;
2140
2141 spin_lock_irqsave(&card->card_lock, flags);
2142 cyy_writeb(info, CyCAR, channel);
2143
2144 /* tx and rx baud rate */
2145
2146 cyy_writeb(info, CyTCOR, info->tco);
2147 cyy_writeb(info, CyTBPR, info->tbpr);
2148 cyy_writeb(info, CyRCOR, info->rco);
2149 cyy_writeb(info, CyRBPR, info->rbpr);
2150
2151 /* set line characteristics according configuration */
2152
2153 cyy_writeb(info, CySCHR1, START_CHAR(tty));
2154 cyy_writeb(info, CySCHR2, STOP_CHAR(tty));
2155 cyy_writeb(info, CyCOR1, info->cor1);
2156 cyy_writeb(info, CyCOR2, info->cor2);
2157 cyy_writeb(info, CyCOR3, info->cor3);
2158 cyy_writeb(info, CyCOR4, info->cor4);
2159 cyy_writeb(info, CyCOR5, info->cor5);
2160
2161 cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR1ch | CyCOR2ch |
2162 CyCOR3ch);
2163
2164 /* !!! Is this needed? */
2165 cyy_writeb(info, CyCAR, channel);
2166 cyy_writeb(info, CyRTPR,
2167 (info->default_timeout ? info->default_timeout : 0x02));
2168 /* 10ms rx timeout */
2169
2170 cflags = CyCTS;
2171 if (!C_CLOCAL(tty))
2172 cflags |= CyDSR | CyRI | CyDCD;
2173 /* without modem intr */
2174 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyMdmCh);
2175 /* act on 1->0 modem transitions */
2176 if ((cflag & CRTSCTS) && info->rflow)
2177 cyy_writeb(info, CyMCOR1, cflags | rflow_thr[i]);
2178 else
2179 cyy_writeb(info, CyMCOR1, cflags);
2180 /* act on 0->1 modem transitions */
2181 cyy_writeb(info, CyMCOR2, cflags);
2182
2183 if (i == 0) /* baud rate is zero, turn off line */
2184 cyy_change_rts_dtr(info, 0, TIOCM_DTR);
2185 else
2186 cyy_change_rts_dtr(info, TIOCM_DTR, 0);
2187
2188 clear_bit(TTY_IO_ERROR, &tty->flags);
2189 spin_unlock_irqrestore(&card->card_lock, flags);
2190
2191 } else {
2192 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
2193 __u32 sw_flow;
2194 int retval;
2195
2196 if (!cyz_is_loaded(card))
2197 return;
2198
2199 /* baud rate */
2200 baud = tty_get_baud_rate(tty);
2201 if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
2202 ASYNC_SPD_CUST) {
2203 if (info->custom_divisor)
2204 baud_rate = info->baud / info->custom_divisor;
2205 else
2206 baud_rate = info->baud;
2207 } else if (baud > CYZ_MAX_SPEED) {
2208 baud = CYZ_MAX_SPEED;
2209 }
2210 cy_writel(&ch_ctrl->comm_baud, baud);
2211
2212 if (baud == 134) {
2213 /* get it right for 134.5 baud */
2214 info->timeout = (info->xmit_fifo_size * HZ * 30 / 269) +
2215 2;
2216 } else if (baud == 38400 && (info->port.flags & ASYNC_SPD_MASK) ==
2217 ASYNC_SPD_CUST) {
2218 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2219 baud_rate) + 2;
2220 } else if (baud) {
2221 info->timeout = (info->xmit_fifo_size * HZ * 15 /
2222 baud) + 2;
2223 /* this needs to be propagated into the card info */
2224 } else {
2225 info->timeout = 0;
2226 }
2227
2228 /* byte size and parity */
2229 switch (cflag & CSIZE) {
2230 case CS5:
2231 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS5);
2232 break;
2233 case CS6:
2234 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS6);
2235 break;
2236 case CS7:
2237 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS7);
2238 break;
2239 case CS8:
2240 cy_writel(&ch_ctrl->comm_data_l, C_DL_CS8);
2241 break;
2242 }
2243 if (cflag & CSTOPB) {
2244 cy_writel(&ch_ctrl->comm_data_l,
2245 readl(&ch_ctrl->comm_data_l) | C_DL_2STOP);
2246 } else {
2247 cy_writel(&ch_ctrl->comm_data_l,
2248 readl(&ch_ctrl->comm_data_l) | C_DL_1STOP);
2249 }
2250 if (cflag & PARENB) {
2251 if (cflag & PARODD)
2252 cy_writel(&ch_ctrl->comm_parity, C_PR_ODD);
2253 else
2254 cy_writel(&ch_ctrl->comm_parity, C_PR_EVEN);
2255 } else
2256 cy_writel(&ch_ctrl->comm_parity, C_PR_NONE);
2257
2258 /* CTS flow control flag */
2259 if (cflag & CRTSCTS) {
2260 cy_writel(&ch_ctrl->hw_flow,
2261 readl(&ch_ctrl->hw_flow) | C_RS_CTS | C_RS_RTS);
2262 } else {
2263 cy_writel(&ch_ctrl->hw_flow, readl(&ch_ctrl->hw_flow) &
2264 ~(C_RS_CTS | C_RS_RTS));
2265 }
2266 /* As the HW flow control is done in firmware, the driver
2267 doesn't need to care about it */
2268 info->port.flags &= ~ASYNC_CTS_FLOW;
2269
2270 /* XON/XOFF/XANY flow control flags */
2271 sw_flow = 0;
2272 if (iflag & IXON) {
2273 sw_flow |= C_FL_OXX;
2274 if (iflag & IXANY)
2275 sw_flow |= C_FL_OIXANY;
2276 }
2277 cy_writel(&ch_ctrl->sw_flow, sw_flow);
2278
2279 retval = cyz_issue_cmd(card, channel, C_CM_IOCTL, 0L);
2280 if (retval != 0) {
2281 printk(KERN_ERR "cyc:set_line_char retval on ttyC%d "
2282 "was %x\n", info->line, retval);
2283 }
2284
2285 /* CD sensitivity */
2286 if (cflag & CLOCAL)
2287 info->port.flags &= ~ASYNC_CHECK_CD;
2288 else
2289 info->port.flags |= ASYNC_CHECK_CD;
2290
2291 if (baud == 0) { /* baud rate is zero, turn off line */
2292 cy_writel(&ch_ctrl->rs_control,
2293 readl(&ch_ctrl->rs_control) & ~C_RS_DTR);
2294#ifdef CY_DEBUG_DTR
2295 printk(KERN_DEBUG "cyc:set_line_char dropping Z DTR\n");
2296#endif
2297 } else {
2298 cy_writel(&ch_ctrl->rs_control,
2299 readl(&ch_ctrl->rs_control) | C_RS_DTR);
2300#ifdef CY_DEBUG_DTR
2301 printk(KERN_DEBUG "cyc:set_line_char raising Z DTR\n");
2302#endif
2303 }
2304
2305 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
2306 if (retval != 0) {
2307 printk(KERN_ERR "cyc:set_line_char(2) retval on ttyC%d "
2308 "was %x\n", info->line, retval);
2309 }
2310
2311 clear_bit(TTY_IO_ERROR, &tty->flags);
2312 }
2313} /* set_line_char */
2314
2315static int cy_get_serial_info(struct cyclades_port *info,
2316 struct serial_struct __user *retinfo)
2317{
2318 struct cyclades_card *cinfo = info->card;
2319 struct serial_struct tmp = {
2320 .type = info->type,
2321 .line = info->line,
2322 .port = (info->card - cy_card) * 0x100 + info->line -
2323 cinfo->first_line,
2324 .irq = cinfo->irq,
2325 .flags = info->port.flags,
2326 .close_delay = info->port.close_delay,
2327 .closing_wait = info->port.closing_wait,
2328 .baud_base = info->baud,
2329 .custom_divisor = info->custom_divisor,
2330 .hub6 = 0, /*!!! */
2331 };
2332 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
2333}
2334
2335static int
2336cy_set_serial_info(struct cyclades_port *info, struct tty_struct *tty,
2337 struct serial_struct __user *new_info)
2338{
2339 struct serial_struct new_serial;
2340 int ret;
2341
2342 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2343 return -EFAULT;
2344
2345 mutex_lock(&info->port.mutex);
2346 if (!capable(CAP_SYS_ADMIN)) {
2347 if (new_serial.close_delay != info->port.close_delay ||
2348 new_serial.baud_base != info->baud ||
2349 (new_serial.flags & ASYNC_FLAGS &
2350 ~ASYNC_USR_MASK) !=
2351 (info->port.flags & ASYNC_FLAGS & ~ASYNC_USR_MASK))
2352 {
2353 mutex_unlock(&info->port.mutex);
2354 return -EPERM;
2355 }
2356 info->port.flags = (info->port.flags & ~ASYNC_USR_MASK) |
2357 (new_serial.flags & ASYNC_USR_MASK);
2358 info->baud = new_serial.baud_base;
2359 info->custom_divisor = new_serial.custom_divisor;
2360 goto check_and_exit;
2361 }
2362
2363 /*
2364 * OK, past this point, all the error checking has been done.
2365 * At this point, we start making changes.....
2366 */
2367
2368 info->baud = new_serial.baud_base;
2369 info->custom_divisor = new_serial.custom_divisor;
2370 info->port.flags = (info->port.flags & ~ASYNC_FLAGS) |
2371 (new_serial.flags & ASYNC_FLAGS);
2372 info->port.close_delay = new_serial.close_delay * HZ / 100;
2373 info->port.closing_wait = new_serial.closing_wait * HZ / 100;
2374
2375check_and_exit:
2376 if (info->port.flags & ASYNC_INITIALIZED) {
2377 cy_set_line_char(info, tty);
2378 ret = 0;
2379 } else {
2380 ret = cy_startup(info, tty);
2381 }
2382 mutex_unlock(&info->port.mutex);
2383 return ret;
2384} /* set_serial_info */
2385
2386/*
2387 * get_lsr_info - get line status register info
2388 *
2389 * Purpose: Let user call ioctl() to get info when the UART physically
2390 * is emptied. On bus types like RS485, the transmitter must
2391 * release the bus after transmitting. This must be done when
2392 * the transmit shift register is empty, not be done when the
2393 * transmit holding register is empty. This functionality
2394 * allows an RS485 driver to be written in user space.
2395 */
2396static int get_lsr_info(struct cyclades_port *info, unsigned int __user *value)
2397{
2398 struct cyclades_card *card = info->card;
2399 unsigned int result;
2400 unsigned long flags;
2401 u8 status;
2402
2403 if (!cy_is_Z(card)) {
2404 spin_lock_irqsave(&card->card_lock, flags);
2405 status = cyy_readb(info, CySRER) & (CyTxRdy | CyTxMpty);
2406 spin_unlock_irqrestore(&card->card_lock, flags);
2407 result = (status ? 0 : TIOCSER_TEMT);
2408 } else {
2409 /* Not supported yet */
2410 return -EINVAL;
2411 }
2412 return put_user(result, value);
2413}
2414
2415static int cy_tiocmget(struct tty_struct *tty)
2416{
2417 struct cyclades_port *info = tty->driver_data;
2418 struct cyclades_card *card;
2419 int result;
2420
2421 if (serial_paranoia_check(info, tty->name, __func__))
2422 return -ENODEV;
2423
2424 card = info->card;
2425
2426 if (!cy_is_Z(card)) {
2427 unsigned long flags;
2428 int channel = info->line - card->first_line;
2429 u8 status;
2430
2431 spin_lock_irqsave(&card->card_lock, flags);
2432 cyy_writeb(info, CyCAR, channel & 0x03);
2433 status = cyy_readb(info, CyMSVR1);
2434 status |= cyy_readb(info, CyMSVR2);
2435 spin_unlock_irqrestore(&card->card_lock, flags);
2436
2437 if (info->rtsdtr_inv) {
2438 result = ((status & CyRTS) ? TIOCM_DTR : 0) |
2439 ((status & CyDTR) ? TIOCM_RTS : 0);
2440 } else {
2441 result = ((status & CyRTS) ? TIOCM_RTS : 0) |
2442 ((status & CyDTR) ? TIOCM_DTR : 0);
2443 }
2444 result |= ((status & CyDCD) ? TIOCM_CAR : 0) |
2445 ((status & CyRI) ? TIOCM_RNG : 0) |
2446 ((status & CyDSR) ? TIOCM_DSR : 0) |
2447 ((status & CyCTS) ? TIOCM_CTS : 0);
2448 } else {
2449 u32 lstatus;
2450
2451 if (!cyz_is_loaded(card)) {
2452 result = -ENODEV;
2453 goto end;
2454 }
2455
2456 lstatus = readl(&info->u.cyz.ch_ctrl->rs_status);
2457 result = ((lstatus & C_RS_RTS) ? TIOCM_RTS : 0) |
2458 ((lstatus & C_RS_DTR) ? TIOCM_DTR : 0) |
2459 ((lstatus & C_RS_DCD) ? TIOCM_CAR : 0) |
2460 ((lstatus & C_RS_RI) ? TIOCM_RNG : 0) |
2461 ((lstatus & C_RS_DSR) ? TIOCM_DSR : 0) |
2462 ((lstatus & C_RS_CTS) ? TIOCM_CTS : 0);
2463 }
2464end:
2465 return result;
2466} /* cy_tiomget */
2467
2468static int
2469cy_tiocmset(struct tty_struct *tty,
2470 unsigned int set, unsigned int clear)
2471{
2472 struct cyclades_port *info = tty->driver_data;
2473 struct cyclades_card *card;
2474 unsigned long flags;
2475
2476 if (serial_paranoia_check(info, tty->name, __func__))
2477 return -ENODEV;
2478
2479 card = info->card;
2480 if (!cy_is_Z(card)) {
2481 spin_lock_irqsave(&card->card_lock, flags);
2482 cyy_change_rts_dtr(info, set, clear);
2483 spin_unlock_irqrestore(&card->card_lock, flags);
2484 } else {
2485 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
2486 int retval, channel = info->line - card->first_line;
2487 u32 rs;
2488
2489 if (!cyz_is_loaded(card))
2490 return -ENODEV;
2491
2492 spin_lock_irqsave(&card->card_lock, flags);
2493 rs = readl(&ch_ctrl->rs_control);
2494 if (set & TIOCM_RTS)
2495 rs |= C_RS_RTS;
2496 if (clear & TIOCM_RTS)
2497 rs &= ~C_RS_RTS;
2498 if (set & TIOCM_DTR) {
2499 rs |= C_RS_DTR;
2500#ifdef CY_DEBUG_DTR
2501 printk(KERN_DEBUG "cyc:set_modem_info raising Z DTR\n");
2502#endif
2503 }
2504 if (clear & TIOCM_DTR) {
2505 rs &= ~C_RS_DTR;
2506#ifdef CY_DEBUG_DTR
2507 printk(KERN_DEBUG "cyc:set_modem_info clearing "
2508 "Z DTR\n");
2509#endif
2510 }
2511 cy_writel(&ch_ctrl->rs_control, rs);
2512 retval = cyz_issue_cmd(card, channel, C_CM_IOCTLM, 0L);
2513 spin_unlock_irqrestore(&card->card_lock, flags);
2514 if (retval != 0) {
2515 printk(KERN_ERR "cyc:set_modem_info retval on ttyC%d "
2516 "was %x\n", info->line, retval);
2517 }
2518 }
2519 return 0;
2520}
2521
2522/*
2523 * cy_break() --- routine which turns the break handling on or off
2524 */
2525static int cy_break(struct tty_struct *tty, int break_state)
2526{
2527 struct cyclades_port *info = tty->driver_data;
2528 struct cyclades_card *card;
2529 unsigned long flags;
2530 int retval = 0;
2531
2532 if (serial_paranoia_check(info, tty->name, "cy_break"))
2533 return -EINVAL;
2534
2535 card = info->card;
2536
2537 spin_lock_irqsave(&card->card_lock, flags);
2538 if (!cy_is_Z(card)) {
2539 /* Let the transmit ISR take care of this (since it
2540 requires stuffing characters into the output stream).
2541 */
2542 if (break_state == -1) {
2543 if (!info->breakon) {
2544 info->breakon = 1;
2545 if (!info->xmit_cnt) {
2546 spin_unlock_irqrestore(&card->card_lock, flags);
2547 start_xmit(info);
2548 spin_lock_irqsave(&card->card_lock, flags);
2549 }
2550 }
2551 } else {
2552 if (!info->breakoff) {
2553 info->breakoff = 1;
2554 if (!info->xmit_cnt) {
2555 spin_unlock_irqrestore(&card->card_lock, flags);
2556 start_xmit(info);
2557 spin_lock_irqsave(&card->card_lock, flags);
2558 }
2559 }
2560 }
2561 } else {
2562 if (break_state == -1) {
2563 retval = cyz_issue_cmd(card,
2564 info->line - card->first_line,
2565 C_CM_SET_BREAK, 0L);
2566 if (retval != 0) {
2567 printk(KERN_ERR "cyc:cy_break (set) retval on "
2568 "ttyC%d was %x\n", info->line, retval);
2569 }
2570 } else {
2571 retval = cyz_issue_cmd(card,
2572 info->line - card->first_line,
2573 C_CM_CLR_BREAK, 0L);
2574 if (retval != 0) {
2575 printk(KERN_DEBUG "cyc:cy_break (clr) retval "
2576 "on ttyC%d was %x\n", info->line,
2577 retval);
2578 }
2579 }
2580 }
2581 spin_unlock_irqrestore(&card->card_lock, flags);
2582 return retval;
2583} /* cy_break */
2584
2585static int set_threshold(struct cyclades_port *info, unsigned long value)
2586{
2587 struct cyclades_card *card = info->card;
2588 unsigned long flags;
2589
2590 if (!cy_is_Z(card)) {
2591 info->cor3 &= ~CyREC_FIFO;
2592 info->cor3 |= value & CyREC_FIFO;
2593
2594 spin_lock_irqsave(&card->card_lock, flags);
2595 cyy_writeb(info, CyCOR3, info->cor3);
2596 cyy_issue_cmd(info, CyCOR_CHANGE | CyCOR3ch);
2597 spin_unlock_irqrestore(&card->card_lock, flags);
2598 }
2599 return 0;
2600} /* set_threshold */
2601
2602static int get_threshold(struct cyclades_port *info,
2603 unsigned long __user *value)
2604{
2605 struct cyclades_card *card = info->card;
2606
2607 if (!cy_is_Z(card)) {
2608 u8 tmp = cyy_readb(info, CyCOR3) & CyREC_FIFO;
2609 return put_user(tmp, value);
2610 }
2611 return 0;
2612} /* get_threshold */
2613
2614static int set_timeout(struct cyclades_port *info, unsigned long value)
2615{
2616 struct cyclades_card *card = info->card;
2617 unsigned long flags;
2618
2619 if (!cy_is_Z(card)) {
2620 spin_lock_irqsave(&card->card_lock, flags);
2621 cyy_writeb(info, CyRTPR, value & 0xff);
2622 spin_unlock_irqrestore(&card->card_lock, flags);
2623 }
2624 return 0;
2625} /* set_timeout */
2626
2627static int get_timeout(struct cyclades_port *info,
2628 unsigned long __user *value)
2629{
2630 struct cyclades_card *card = info->card;
2631
2632 if (!cy_is_Z(card)) {
2633 u8 tmp = cyy_readb(info, CyRTPR);
2634 return put_user(tmp, value);
2635 }
2636 return 0;
2637} /* get_timeout */
2638
2639static int cy_cflags_changed(struct cyclades_port *info, unsigned long arg,
2640 struct cyclades_icount *cprev)
2641{
2642 struct cyclades_icount cnow;
2643 unsigned long flags;
2644 int ret;
2645
2646 spin_lock_irqsave(&info->card->card_lock, flags);
2647 cnow = info->icount; /* atomic copy */
2648 spin_unlock_irqrestore(&info->card->card_lock, flags);
2649
2650 ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
2651 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
2652 ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
2653 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
2654
2655 *cprev = cnow;
2656
2657 return ret;
2658}
2659
2660/*
2661 * This routine allows the tty driver to implement device-
2662 * specific ioctl's. If the ioctl number passed in cmd is
2663 * not recognized by the driver, it should return ENOIOCTLCMD.
2664 */
2665static int
2666cy_ioctl(struct tty_struct *tty,
2667 unsigned int cmd, unsigned long arg)
2668{
2669 struct cyclades_port *info = tty->driver_data;
2670 struct cyclades_icount cnow; /* kernel counter temps */
2671 int ret_val = 0;
2672 unsigned long flags;
2673 void __user *argp = (void __user *)arg;
2674
2675 if (serial_paranoia_check(info, tty->name, "cy_ioctl"))
2676 return -ENODEV;
2677
2678#ifdef CY_DEBUG_OTHER
2679 printk(KERN_DEBUG "cyc:cy_ioctl ttyC%d, cmd = %x arg = %lx\n",
2680 info->line, cmd, arg);
2681#endif
2682
2683 switch (cmd) {
2684 case CYGETMON:
2685 if (copy_to_user(argp, &info->mon, sizeof(info->mon))) {
2686 ret_val = -EFAULT;
2687 break;
2688 }
2689 memset(&info->mon, 0, sizeof(info->mon));
2690 break;
2691 case CYGETTHRESH:
2692 ret_val = get_threshold(info, argp);
2693 break;
2694 case CYSETTHRESH:
2695 ret_val = set_threshold(info, arg);
2696 break;
2697 case CYGETDEFTHRESH:
2698 ret_val = put_user(info->default_threshold,
2699 (unsigned long __user *)argp);
2700 break;
2701 case CYSETDEFTHRESH:
2702 info->default_threshold = arg & 0x0f;
2703 break;
2704 case CYGETTIMEOUT:
2705 ret_val = get_timeout(info, argp);
2706 break;
2707 case CYSETTIMEOUT:
2708 ret_val = set_timeout(info, arg);
2709 break;
2710 case CYGETDEFTIMEOUT:
2711 ret_val = put_user(info->default_timeout,
2712 (unsigned long __user *)argp);
2713 break;
2714 case CYSETDEFTIMEOUT:
2715 info->default_timeout = arg & 0xff;
2716 break;
2717 case CYSETRFLOW:
2718 info->rflow = (int)arg;
2719 break;
2720 case CYGETRFLOW:
2721 ret_val = info->rflow;
2722 break;
2723 case CYSETRTSDTR_INV:
2724 info->rtsdtr_inv = (int)arg;
2725 break;
2726 case CYGETRTSDTR_INV:
2727 ret_val = info->rtsdtr_inv;
2728 break;
2729 case CYGETCD1400VER:
2730 ret_val = info->chip_rev;
2731 break;
2732#ifndef CONFIG_CYZ_INTR
2733 case CYZSETPOLLCYCLE:
2734 cyz_polling_cycle = (arg * HZ) / 1000;
2735 break;
2736 case CYZGETPOLLCYCLE:
2737 ret_val = (cyz_polling_cycle * 1000) / HZ;
2738 break;
2739#endif /* CONFIG_CYZ_INTR */
2740 case CYSETWAIT:
2741 info->port.closing_wait = (unsigned short)arg * HZ / 100;
2742 break;
2743 case CYGETWAIT:
2744 ret_val = info->port.closing_wait / (HZ / 100);
2745 break;
2746 case TIOCGSERIAL:
2747 ret_val = cy_get_serial_info(info, argp);
2748 break;
2749 case TIOCSSERIAL:
2750 ret_val = cy_set_serial_info(info, tty, argp);
2751 break;
2752 case TIOCSERGETLSR: /* Get line status register */
2753 ret_val = get_lsr_info(info, argp);
2754 break;
2755 /*
2756 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
2757 * - mask passed in arg for lines of interest
2758 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
2759 * Caller should use TIOCGICOUNT to see which one it was
2760 */
2761 case TIOCMIWAIT:
2762 spin_lock_irqsave(&info->card->card_lock, flags);
2763 /* note the counters on entry */
2764 cnow = info->icount;
2765 spin_unlock_irqrestore(&info->card->card_lock, flags);
2766 ret_val = wait_event_interruptible(info->port.delta_msr_wait,
2767 cy_cflags_changed(info, arg, &cnow));
2768 break;
2769
2770 /*
2771 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
2772 * Return: write counters to the user passed counter struct
2773 * NB: both 1->0 and 0->1 transitions are counted except for
2774 * RI where only 0->1 is counted.
2775 */
2776 default:
2777 ret_val = -ENOIOCTLCMD;
2778 }
2779
2780#ifdef CY_DEBUG_OTHER
2781 printk(KERN_DEBUG "cyc:cy_ioctl done\n");
2782#endif
2783 return ret_val;
2784} /* cy_ioctl */
2785
2786static int cy_get_icount(struct tty_struct *tty,
2787 struct serial_icounter_struct *sic)
2788{
2789 struct cyclades_port *info = tty->driver_data;
2790 struct cyclades_icount cnow; /* Used to snapshot */
2791 unsigned long flags;
2792
2793 spin_lock_irqsave(&info->card->card_lock, flags);
2794 cnow = info->icount;
2795 spin_unlock_irqrestore(&info->card->card_lock, flags);
2796
2797 sic->cts = cnow.cts;
2798 sic->dsr = cnow.dsr;
2799 sic->rng = cnow.rng;
2800 sic->dcd = cnow.dcd;
2801 sic->rx = cnow.rx;
2802 sic->tx = cnow.tx;
2803 sic->frame = cnow.frame;
2804 sic->overrun = cnow.overrun;
2805 sic->parity = cnow.parity;
2806 sic->brk = cnow.brk;
2807 sic->buf_overrun = cnow.buf_overrun;
2808 return 0;
2809}
2810
2811/*
2812 * This routine allows the tty driver to be notified when
2813 * device's termios settings have changed. Note that a
2814 * well-designed tty driver should be prepared to accept the case
2815 * where old == NULL, and try to do something rational.
2816 */
2817static void cy_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
2818{
2819 struct cyclades_port *info = tty->driver_data;
2820
2821#ifdef CY_DEBUG_OTHER
2822 printk(KERN_DEBUG "cyc:cy_set_termios ttyC%d\n", info->line);
2823#endif
2824
2825 cy_set_line_char(info, tty);
2826
2827 if ((old_termios->c_cflag & CRTSCTS) &&
2828 !(tty->termios->c_cflag & CRTSCTS)) {
2829 tty->hw_stopped = 0;
2830 cy_start(tty);
2831 }
2832#if 0
2833 /*
2834 * No need to wake up processes in open wait, since they
2835 * sample the CLOCAL flag once, and don't recheck it.
2836 * XXX It's not clear whether the current behavior is correct
2837 * or not. Hence, this may change.....
2838 */
2839 if (!(old_termios->c_cflag & CLOCAL) &&
2840 (tty->termios->c_cflag & CLOCAL))
2841 wake_up_interruptible(&info->port.open_wait);
2842#endif
2843} /* cy_set_termios */
2844
2845/* This function is used to send a high-priority XON/XOFF character to
2846 the device.
2847*/
2848static void cy_send_xchar(struct tty_struct *tty, char ch)
2849{
2850 struct cyclades_port *info = tty->driver_data;
2851 struct cyclades_card *card;
2852 int channel;
2853
2854 if (serial_paranoia_check(info, tty->name, "cy_send_xchar"))
2855 return;
2856
2857 info->x_char = ch;
2858
2859 if (ch)
2860 cy_start(tty);
2861
2862 card = info->card;
2863 channel = info->line - card->first_line;
2864
2865 if (cy_is_Z(card)) {
2866 if (ch == STOP_CHAR(tty))
2867 cyz_issue_cmd(card, channel, C_CM_SENDXOFF, 0L);
2868 else if (ch == START_CHAR(tty))
2869 cyz_issue_cmd(card, channel, C_CM_SENDXON, 0L);
2870 }
2871}
2872
2873/* This routine is called by the upper-layer tty layer to signal
2874 that incoming characters should be throttled because the input
2875 buffers are close to full.
2876 */
2877static void cy_throttle(struct tty_struct *tty)
2878{
2879 struct cyclades_port *info = tty->driver_data;
2880 struct cyclades_card *card;
2881 unsigned long flags;
2882
2883#ifdef CY_DEBUG_THROTTLE
2884 char buf[64];
2885
2886 printk(KERN_DEBUG "cyc:throttle %s: %ld...ttyC%d\n", tty_name(tty, buf),
2887 tty->ldisc.chars_in_buffer(tty), info->line);
2888#endif
2889
2890 if (serial_paranoia_check(info, tty->name, "cy_throttle"))
2891 return;
2892
2893 card = info->card;
2894
2895 if (I_IXOFF(tty)) {
2896 if (!cy_is_Z(card))
2897 cy_send_xchar(tty, STOP_CHAR(tty));
2898 else
2899 info->throttle = 1;
2900 }
2901
2902 if (tty->termios->c_cflag & CRTSCTS) {
2903 if (!cy_is_Z(card)) {
2904 spin_lock_irqsave(&card->card_lock, flags);
2905 cyy_change_rts_dtr(info, 0, TIOCM_RTS);
2906 spin_unlock_irqrestore(&card->card_lock, flags);
2907 } else {
2908 info->throttle = 1;
2909 }
2910 }
2911} /* cy_throttle */
2912
2913/*
2914 * This routine notifies the tty driver that it should signal
2915 * that characters can now be sent to the tty without fear of
2916 * overrunning the input buffers of the line disciplines.
2917 */
2918static void cy_unthrottle(struct tty_struct *tty)
2919{
2920 struct cyclades_port *info = tty->driver_data;
2921 struct cyclades_card *card;
2922 unsigned long flags;
2923
2924#ifdef CY_DEBUG_THROTTLE
2925 char buf[64];
2926
2927 printk(KERN_DEBUG "cyc:unthrottle %s: %ld...ttyC%d\n",
2928 tty_name(tty, buf), tty_chars_in_buffer(tty), info->line);
2929#endif
2930
2931 if (serial_paranoia_check(info, tty->name, "cy_unthrottle"))
2932 return;
2933
2934 if (I_IXOFF(tty)) {
2935 if (info->x_char)
2936 info->x_char = 0;
2937 else
2938 cy_send_xchar(tty, START_CHAR(tty));
2939 }
2940
2941 if (tty->termios->c_cflag & CRTSCTS) {
2942 card = info->card;
2943 if (!cy_is_Z(card)) {
2944 spin_lock_irqsave(&card->card_lock, flags);
2945 cyy_change_rts_dtr(info, TIOCM_RTS, 0);
2946 spin_unlock_irqrestore(&card->card_lock, flags);
2947 } else {
2948 info->throttle = 0;
2949 }
2950 }
2951} /* cy_unthrottle */
2952
2953/* cy_start and cy_stop provide software output flow control as a
2954 function of XON/XOFF, software CTS, and other such stuff.
2955*/
2956static void cy_stop(struct tty_struct *tty)
2957{
2958 struct cyclades_card *cinfo;
2959 struct cyclades_port *info = tty->driver_data;
2960 int channel;
2961 unsigned long flags;
2962
2963#ifdef CY_DEBUG_OTHER
2964 printk(KERN_DEBUG "cyc:cy_stop ttyC%d\n", info->line);
2965#endif
2966
2967 if (serial_paranoia_check(info, tty->name, "cy_stop"))
2968 return;
2969
2970 cinfo = info->card;
2971 channel = info->line - cinfo->first_line;
2972 if (!cy_is_Z(cinfo)) {
2973 spin_lock_irqsave(&cinfo->card_lock, flags);
2974 cyy_writeb(info, CyCAR, channel & 0x03);
2975 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) & ~CyTxRdy);
2976 spin_unlock_irqrestore(&cinfo->card_lock, flags);
2977 }
2978} /* cy_stop */
2979
2980static void cy_start(struct tty_struct *tty)
2981{
2982 struct cyclades_card *cinfo;
2983 struct cyclades_port *info = tty->driver_data;
2984 int channel;
2985 unsigned long flags;
2986
2987#ifdef CY_DEBUG_OTHER
2988 printk(KERN_DEBUG "cyc:cy_start ttyC%d\n", info->line);
2989#endif
2990
2991 if (serial_paranoia_check(info, tty->name, "cy_start"))
2992 return;
2993
2994 cinfo = info->card;
2995 channel = info->line - cinfo->first_line;
2996 if (!cy_is_Z(cinfo)) {
2997 spin_lock_irqsave(&cinfo->card_lock, flags);
2998 cyy_writeb(info, CyCAR, channel & 0x03);
2999 cyy_writeb(info, CySRER, cyy_readb(info, CySRER) | CyTxRdy);
3000 spin_unlock_irqrestore(&cinfo->card_lock, flags);
3001 }
3002} /* cy_start */
3003
3004/*
3005 * cy_hangup() --- called by tty_hangup() when a hangup is signaled.
3006 */
3007static void cy_hangup(struct tty_struct *tty)
3008{
3009 struct cyclades_port *info = tty->driver_data;
3010
3011#ifdef CY_DEBUG_OTHER
3012 printk(KERN_DEBUG "cyc:cy_hangup ttyC%d\n", info->line);
3013#endif
3014
3015 if (serial_paranoia_check(info, tty->name, "cy_hangup"))
3016 return;
3017
3018 cy_flush_buffer(tty);
3019 cy_shutdown(info, tty);
3020 tty_port_hangup(&info->port);
3021} /* cy_hangup */
3022
3023static int cyy_carrier_raised(struct tty_port *port)
3024{
3025 struct cyclades_port *info = container_of(port, struct cyclades_port,
3026 port);
3027 struct cyclades_card *cinfo = info->card;
3028 unsigned long flags;
3029 int channel = info->line - cinfo->first_line;
3030 u32 cd;
3031
3032 spin_lock_irqsave(&cinfo->card_lock, flags);
3033 cyy_writeb(info, CyCAR, channel & 0x03);
3034 cd = cyy_readb(info, CyMSVR1) & CyDCD;
3035 spin_unlock_irqrestore(&cinfo->card_lock, flags);
3036
3037 return cd;
3038}
3039
3040static void cyy_dtr_rts(struct tty_port *port, int raise)
3041{
3042 struct cyclades_port *info = container_of(port, struct cyclades_port,
3043 port);
3044 struct cyclades_card *cinfo = info->card;
3045 unsigned long flags;
3046
3047 spin_lock_irqsave(&cinfo->card_lock, flags);
3048 cyy_change_rts_dtr(info, raise ? TIOCM_RTS | TIOCM_DTR : 0,
3049 raise ? 0 : TIOCM_RTS | TIOCM_DTR);
3050 spin_unlock_irqrestore(&cinfo->card_lock, flags);
3051}
3052
3053static int cyz_carrier_raised(struct tty_port *port)
3054{
3055 struct cyclades_port *info = container_of(port, struct cyclades_port,
3056 port);
3057
3058 return readl(&info->u.cyz.ch_ctrl->rs_status) & C_RS_DCD;
3059}
3060
3061static void cyz_dtr_rts(struct tty_port *port, int raise)
3062{
3063 struct cyclades_port *info = container_of(port, struct cyclades_port,
3064 port);
3065 struct cyclades_card *cinfo = info->card;
3066 struct CH_CTRL __iomem *ch_ctrl = info->u.cyz.ch_ctrl;
3067 int ret, channel = info->line - cinfo->first_line;
3068 u32 rs;
3069
3070 rs = readl(&ch_ctrl->rs_control);
3071 if (raise)
3072 rs |= C_RS_RTS | C_RS_DTR;
3073 else
3074 rs &= ~(C_RS_RTS | C_RS_DTR);
3075 cy_writel(&ch_ctrl->rs_control, rs);
3076 ret = cyz_issue_cmd(cinfo, channel, C_CM_IOCTLM, 0L);
3077 if (ret != 0)
3078 printk(KERN_ERR "%s: retval on ttyC%d was %x\n",
3079 __func__, info->line, ret);
3080#ifdef CY_DEBUG_DTR
3081 printk(KERN_DEBUG "%s: raising Z DTR\n", __func__);
3082#endif
3083}
3084
3085static const struct tty_port_operations cyy_port_ops = {
3086 .carrier_raised = cyy_carrier_raised,
3087 .dtr_rts = cyy_dtr_rts,
3088 .shutdown = cy_do_close,
3089};
3090
3091static const struct tty_port_operations cyz_port_ops = {
3092 .carrier_raised = cyz_carrier_raised,
3093 .dtr_rts = cyz_dtr_rts,
3094 .shutdown = cy_do_close,
3095};
3096
3097/*
3098 * ---------------------------------------------------------------------
3099 * cy_init() and friends
3100 *
3101 * cy_init() is called at boot-time to initialize the serial driver.
3102 * ---------------------------------------------------------------------
3103 */
3104
3105static int __devinit cy_init_card(struct cyclades_card *cinfo)
3106{
3107 struct cyclades_port *info;
3108 unsigned int channel, port;
3109
3110 spin_lock_init(&cinfo->card_lock);
3111 cinfo->intr_enabled = 0;
3112
3113 cinfo->ports = kcalloc(cinfo->nports, sizeof(*cinfo->ports),
3114 GFP_KERNEL);
3115 if (cinfo->ports == NULL) {
3116 printk(KERN_ERR "Cyclades: cannot allocate ports\n");
3117 return -ENOMEM;
3118 }
3119
3120 for (channel = 0, port = cinfo->first_line; channel < cinfo->nports;
3121 channel++, port++) {
3122 info = &cinfo->ports[channel];
3123 tty_port_init(&info->port);
3124 info->magic = CYCLADES_MAGIC;
3125 info->card = cinfo;
3126 info->line = port;
3127
3128 info->port.closing_wait = CLOSING_WAIT_DELAY;
3129 info->port.close_delay = 5 * HZ / 10;
3130 info->port.flags = STD_COM_FLAGS;
3131 init_completion(&info->shutdown_wait);
3132
3133 if (cy_is_Z(cinfo)) {
3134 struct FIRM_ID *firm_id = cinfo->base_addr + ID_ADDRESS;
3135 struct ZFW_CTRL *zfw_ctrl;
3136
3137 info->port.ops = &cyz_port_ops;
3138 info->type = PORT_STARTECH;
3139
3140 zfw_ctrl = cinfo->base_addr +
3141 (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3142 info->u.cyz.ch_ctrl = &zfw_ctrl->ch_ctrl[channel];
3143 info->u.cyz.buf_ctrl = &zfw_ctrl->buf_ctrl[channel];
3144
3145 if (cinfo->hw_ver == ZO_V1)
3146 info->xmit_fifo_size = CYZ_FIFO_SIZE;
3147 else
3148 info->xmit_fifo_size = 4 * CYZ_FIFO_SIZE;
3149#ifdef CONFIG_CYZ_INTR
3150 setup_timer(&cyz_rx_full_timer[port],
3151 cyz_rx_restart, (unsigned long)info);
3152#endif
3153 } else {
3154 unsigned short chip_number;
3155 int index = cinfo->bus_index;
3156
3157 info->port.ops = &cyy_port_ops;
3158 info->type = PORT_CIRRUS;
3159 info->xmit_fifo_size = CyMAX_CHAR_FIFO;
3160 info->cor1 = CyPARITY_NONE | Cy_1_STOP | Cy_8_BITS;
3161 info->cor2 = CyETC;
3162 info->cor3 = 0x08; /* _very_ small rcv threshold */
3163
3164 chip_number = channel / CyPORTS_PER_CHIP;
3165 info->u.cyy.base_addr = cinfo->base_addr +
3166 (cy_chip_offset[chip_number] << index);
3167 info->chip_rev = cyy_readb(info, CyGFRCR);
3168
3169 if (info->chip_rev >= CD1400_REV_J) {
3170 /* It is a CD1400 rev. J or later */
3171 info->tbpr = baud_bpr_60[13]; /* Tx BPR */
3172 info->tco = baud_co_60[13]; /* Tx CO */
3173 info->rbpr = baud_bpr_60[13]; /* Rx BPR */
3174 info->rco = baud_co_60[13]; /* Rx CO */
3175 info->rtsdtr_inv = 1;
3176 } else {
3177 info->tbpr = baud_bpr_25[13]; /* Tx BPR */
3178 info->tco = baud_co_25[13]; /* Tx CO */
3179 info->rbpr = baud_bpr_25[13]; /* Rx BPR */
3180 info->rco = baud_co_25[13]; /* Rx CO */
3181 info->rtsdtr_inv = 0;
3182 }
3183 info->read_status_mask = CyTIMEOUT | CySPECHAR |
3184 CyBREAK | CyPARITY | CyFRAME | CyOVERRUN;
3185 }
3186
3187 }
3188
3189#ifndef CONFIG_CYZ_INTR
3190 if (cy_is_Z(cinfo) && !timer_pending(&cyz_timerlist)) {
3191 mod_timer(&cyz_timerlist, jiffies + 1);
3192#ifdef CY_PCI_DEBUG
3193 printk(KERN_DEBUG "Cyclades-Z polling initialized\n");
3194#endif
3195 }
3196#endif
3197 return 0;
3198}
3199
3200/* initialize chips on Cyclom-Y card -- return number of valid
3201 chips (which is number of ports/4) */
3202static unsigned short __devinit cyy_init_card(void __iomem *true_base_addr,
3203 int index)
3204{
3205 unsigned int chip_number;
3206 void __iomem *base_addr;
3207
3208 cy_writeb(true_base_addr + (Cy_HwReset << index), 0);
3209 /* Cy_HwReset is 0x1400 */
3210 cy_writeb(true_base_addr + (Cy_ClrIntr << index), 0);
3211 /* Cy_ClrIntr is 0x1800 */
3212 udelay(500L);
3213
3214 for (chip_number = 0; chip_number < CyMAX_CHIPS_PER_CARD;
3215 chip_number++) {
3216 base_addr =
3217 true_base_addr + (cy_chip_offset[chip_number] << index);
3218 mdelay(1);
3219 if (readb(base_addr + (CyCCR << index)) != 0x00) {
3220 /*************
3221 printk(" chip #%d at %#6lx is never idle (CCR != 0)\n",
3222 chip_number, (unsigned long)base_addr);
3223 *************/
3224 return chip_number;
3225 }
3226
3227 cy_writeb(base_addr + (CyGFRCR << index), 0);
3228 udelay(10L);
3229
3230 /* The Cyclom-16Y does not decode address bit 9 and therefore
3231 cannot distinguish between references to chip 0 and a non-
3232 existent chip 4. If the preceding clearing of the supposed
3233 chip 4 GFRCR register appears at chip 0, there is no chip 4
3234 and this must be a Cyclom-16Y, not a Cyclom-32Ye.
3235 */
3236 if (chip_number == 4 && readb(true_base_addr +
3237 (cy_chip_offset[0] << index) +
3238 (CyGFRCR << index)) == 0) {
3239 return chip_number;
3240 }
3241
3242 cy_writeb(base_addr + (CyCCR << index), CyCHIP_RESET);
3243 mdelay(1);
3244
3245 if (readb(base_addr + (CyGFRCR << index)) == 0x00) {
3246 /*
3247 printk(" chip #%d at %#6lx is not responding ",
3248 chip_number, (unsigned long)base_addr);
3249 printk("(GFRCR stayed 0)\n",
3250 */
3251 return chip_number;
3252 }
3253 if ((0xf0 & (readb(base_addr + (CyGFRCR << index)))) !=
3254 0x40) {
3255 /*
3256 printk(" chip #%d at %#6lx is not valid (GFRCR == "
3257 "%#2x)\n",
3258 chip_number, (unsigned long)base_addr,
3259 base_addr[CyGFRCR<<index]);
3260 */
3261 return chip_number;
3262 }
3263 cy_writeb(base_addr + (CyGCR << index), CyCH0_SERIAL);
3264 if (readb(base_addr + (CyGFRCR << index)) >= CD1400_REV_J) {
3265 /* It is a CD1400 rev. J or later */
3266 /* Impossible to reach 5ms with this chip.
3267 Changed to 2ms instead (f = 500 Hz). */
3268 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_60_2MS);
3269 } else {
3270 /* f = 200 Hz */
3271 cy_writeb(base_addr + (CyPPR << index), CyCLOCK_25_5MS);
3272 }
3273
3274 /*
3275 printk(" chip #%d at %#6lx is rev 0x%2x\n",
3276 chip_number, (unsigned long)base_addr,
3277 readb(base_addr+(CyGFRCR<<index)));
3278 */
3279 }
3280 return chip_number;
3281} /* cyy_init_card */
3282
3283/*
3284 * ---------------------------------------------------------------------
3285 * cy_detect_isa() - Probe for Cyclom-Y/ISA boards.
3286 * sets global variables and return the number of ISA boards found.
3287 * ---------------------------------------------------------------------
3288 */
3289static int __init cy_detect_isa(void)
3290{
3291#ifdef CONFIG_ISA
3292 unsigned short cy_isa_irq, nboard;
3293 void __iomem *cy_isa_address;
3294 unsigned short i, j, cy_isa_nchan;
3295 int isparam = 0;
3296
3297 nboard = 0;
3298
3299 /* Check for module parameters */
3300 for (i = 0; i < NR_CARDS; i++) {
3301 if (maddr[i] || i) {
3302 isparam = 1;
3303 cy_isa_addresses[i] = maddr[i];
3304 }
3305 if (!maddr[i])
3306 break;
3307 }
3308
3309 /* scan the address table probing for Cyclom-Y/ISA boards */
3310 for (i = 0; i < NR_ISA_ADDRS; i++) {
3311 unsigned int isa_address = cy_isa_addresses[i];
3312 if (isa_address == 0x0000)
3313 return nboard;
3314
3315 /* probe for CD1400... */
3316 cy_isa_address = ioremap_nocache(isa_address, CyISA_Ywin);
3317 if (cy_isa_address == NULL) {
3318 printk(KERN_ERR "Cyclom-Y/ISA: can't remap base "
3319 "address\n");
3320 continue;
3321 }
3322 cy_isa_nchan = CyPORTS_PER_CHIP *
3323 cyy_init_card(cy_isa_address, 0);
3324 if (cy_isa_nchan == 0) {
3325 iounmap(cy_isa_address);
3326 continue;
3327 }
3328
3329 if (isparam && i < NR_CARDS && irq[i])
3330 cy_isa_irq = irq[i];
3331 else
3332 /* find out the board's irq by probing */
3333 cy_isa_irq = detect_isa_irq(cy_isa_address);
3334 if (cy_isa_irq == 0) {
3335 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but the "
3336 "IRQ could not be detected.\n",
3337 (unsigned long)cy_isa_address);
3338 iounmap(cy_isa_address);
3339 continue;
3340 }
3341
3342 if ((cy_next_channel + cy_isa_nchan) > NR_PORTS) {
3343 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
3344 "more channels are available. Change NR_PORTS "
3345 "in cyclades.c and recompile kernel.\n",
3346 (unsigned long)cy_isa_address);
3347 iounmap(cy_isa_address);
3348 return nboard;
3349 }
3350 /* fill the next cy_card structure available */
3351 for (j = 0; j < NR_CARDS; j++) {
3352 if (cy_card[j].base_addr == NULL)
3353 break;
3354 }
3355 if (j == NR_CARDS) { /* no more cy_cards available */
3356 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but no "
3357 "more cards can be used. Change NR_CARDS in "
3358 "cyclades.c and recompile kernel.\n",
3359 (unsigned long)cy_isa_address);
3360 iounmap(cy_isa_address);
3361 return nboard;
3362 }
3363
3364 /* allocate IRQ */
3365 if (request_irq(cy_isa_irq, cyy_interrupt,
3366 0, "Cyclom-Y", &cy_card[j])) {
3367 printk(KERN_ERR "Cyclom-Y/ISA found at 0x%lx, but "
3368 "could not allocate IRQ#%d.\n",
3369 (unsigned long)cy_isa_address, cy_isa_irq);
3370 iounmap(cy_isa_address);
3371 return nboard;
3372 }
3373
3374 /* set cy_card */
3375 cy_card[j].base_addr = cy_isa_address;
3376 cy_card[j].ctl_addr.p9050 = NULL;
3377 cy_card[j].irq = (int)cy_isa_irq;
3378 cy_card[j].bus_index = 0;
3379 cy_card[j].first_line = cy_next_channel;
3380 cy_card[j].num_chips = cy_isa_nchan / CyPORTS_PER_CHIP;
3381 cy_card[j].nports = cy_isa_nchan;
3382 if (cy_init_card(&cy_card[j])) {
3383 cy_card[j].base_addr = NULL;
3384 free_irq(cy_isa_irq, &cy_card[j]);
3385 iounmap(cy_isa_address);
3386 continue;
3387 }
3388 nboard++;
3389
3390 printk(KERN_INFO "Cyclom-Y/ISA #%d: 0x%lx-0x%lx, IRQ%d found: "
3391 "%d channels starting from port %d\n",
3392 j + 1, (unsigned long)cy_isa_address,
3393 (unsigned long)(cy_isa_address + (CyISA_Ywin - 1)),
3394 cy_isa_irq, cy_isa_nchan, cy_next_channel);
3395
3396 for (j = cy_next_channel;
3397 j < cy_next_channel + cy_isa_nchan; j++)
3398 tty_register_device(cy_serial_driver, j, NULL);
3399 cy_next_channel += cy_isa_nchan;
3400 }
3401 return nboard;
3402#else
3403 return 0;
3404#endif /* CONFIG_ISA */
3405} /* cy_detect_isa */
3406
3407#ifdef CONFIG_PCI
3408static inline int __devinit cyc_isfwstr(const char *str, unsigned int size)
3409{
3410 unsigned int a;
3411
3412 for (a = 0; a < size && *str; a++, str++)
3413 if (*str & 0x80)
3414 return -EINVAL;
3415
3416 for (; a < size; a++, str++)
3417 if (*str)
3418 return -EINVAL;
3419
3420 return 0;
3421}
3422
3423static inline void __devinit cyz_fpga_copy(void __iomem *fpga, const u8 *data,
3424 unsigned int size)
3425{
3426 for (; size > 0; size--) {
3427 cy_writel(fpga, *data++);
3428 udelay(10);
3429 }
3430}
3431
3432static void __devinit plx_init(struct pci_dev *pdev, int irq,
3433 struct RUNTIME_9060 __iomem *addr)
3434{
3435 /* Reset PLX */
3436 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x40000000);
3437 udelay(100L);
3438 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x40000000);
3439
3440 /* Reload Config. Registers from EEPROM */
3441 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) | 0x20000000);
3442 udelay(100L);
3443 cy_writel(&addr->init_ctrl, readl(&addr->init_ctrl) & ~0x20000000);
3444
3445 /* For some yet unknown reason, once the PLX9060 reloads the EEPROM,
3446 * the IRQ is lost and, thus, we have to re-write it to the PCI config.
3447 * registers. This will remain here until we find a permanent fix.
3448 */
3449 pci_write_config_byte(pdev, PCI_INTERRUPT_LINE, irq);
3450}
3451
3452static int __devinit __cyz_load_fw(const struct firmware *fw,
3453 const char *name, const u32 mailbox, void __iomem *base,
3454 void __iomem *fpga)
3455{
3456 const void *ptr = fw->data;
3457 const struct zfile_header *h = ptr;
3458 const struct zfile_config *c, *cs;
3459 const struct zfile_block *b, *bs;
3460 unsigned int a, tmp, len = fw->size;
3461#define BAD_FW KERN_ERR "Bad firmware: "
3462 if (len < sizeof(*h)) {
3463 printk(BAD_FW "too short: %u<%zu\n", len, sizeof(*h));
3464 return -EINVAL;
3465 }
3466
3467 cs = ptr + h->config_offset;
3468 bs = ptr + h->block_offset;
3469
3470 if ((void *)(cs + h->n_config) > ptr + len ||
3471 (void *)(bs + h->n_blocks) > ptr + len) {
3472 printk(BAD_FW "too short");
3473 return -EINVAL;
3474 }
3475
3476 if (cyc_isfwstr(h->name, sizeof(h->name)) ||
3477 cyc_isfwstr(h->date, sizeof(h->date))) {
3478 printk(BAD_FW "bad formatted header string\n");
3479 return -EINVAL;
3480 }
3481
3482 if (strncmp(name, h->name, sizeof(h->name))) {
3483 printk(BAD_FW "bad name '%s' (expected '%s')\n", h->name, name);
3484 return -EINVAL;
3485 }
3486
3487 tmp = 0;
3488 for (c = cs; c < cs + h->n_config; c++) {
3489 for (a = 0; a < c->n_blocks; a++)
3490 if (c->block_list[a] > h->n_blocks) {
3491 printk(BAD_FW "bad block ref number in cfgs\n");
3492 return -EINVAL;
3493 }
3494 if (c->mailbox == mailbox && c->function == 0) /* 0 is normal */
3495 tmp++;
3496 }
3497 if (!tmp) {
3498 printk(BAD_FW "nothing appropriate\n");
3499 return -EINVAL;
3500 }
3501
3502 for (b = bs; b < bs + h->n_blocks; b++)
3503 if (b->file_offset + b->size > len) {
3504 printk(BAD_FW "bad block data offset\n");
3505 return -EINVAL;
3506 }
3507
3508 /* everything is OK, let's seek'n'load it */
3509 for (c = cs; c < cs + h->n_config; c++)
3510 if (c->mailbox == mailbox && c->function == 0)
3511 break;
3512
3513 for (a = 0; a < c->n_blocks; a++) {
3514 b = &bs[c->block_list[a]];
3515 if (b->type == ZBLOCK_FPGA) {
3516 if (fpga != NULL)
3517 cyz_fpga_copy(fpga, ptr + b->file_offset,
3518 b->size);
3519 } else {
3520 if (base != NULL)
3521 memcpy_toio(base + b->ram_offset,
3522 ptr + b->file_offset, b->size);
3523 }
3524 }
3525#undef BAD_FW
3526 return 0;
3527}
3528
3529static int __devinit cyz_load_fw(struct pci_dev *pdev, void __iomem *base_addr,
3530 struct RUNTIME_9060 __iomem *ctl_addr, int irq)
3531{
3532 const struct firmware *fw;
3533 struct FIRM_ID __iomem *fid = base_addr + ID_ADDRESS;
3534 struct CUSTOM_REG __iomem *cust = base_addr;
3535 struct ZFW_CTRL __iomem *pt_zfwctrl;
3536 void __iomem *tmp;
3537 u32 mailbox, status, nchan;
3538 unsigned int i;
3539 int retval;
3540
3541 retval = request_firmware(&fw, "cyzfirm.bin", &pdev->dev);
3542 if (retval) {
3543 dev_err(&pdev->dev, "can't get firmware\n");
3544 goto err;
3545 }
3546
3547 /* Check whether the firmware is already loaded and running. If
3548 positive, skip this board */
3549 if (__cyz_fpga_loaded(ctl_addr) && readl(&fid->signature) == ZFIRM_ID) {
3550 u32 cntval = readl(base_addr + 0x190);
3551
3552 udelay(100);
3553 if (cntval != readl(base_addr + 0x190)) {
3554 /* FW counter is working, FW is running */
3555 dev_dbg(&pdev->dev, "Cyclades-Z FW already loaded. "
3556 "Skipping board.\n");
3557 retval = 0;
3558 goto err_rel;
3559 }
3560 }
3561
3562 /* start boot */
3563 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) &
3564 ~0x00030800UL);
3565
3566 mailbox = readl(&ctl_addr->mail_box_0);
3567
3568 if (mailbox == 0 || __cyz_fpga_loaded(ctl_addr)) {
3569 /* stops CPU and set window to beginning of RAM */
3570 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3571 cy_writel(&cust->cpu_stop, 0);
3572 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3573 udelay(100);
3574 }
3575
3576 plx_init(pdev, irq, ctl_addr);
3577
3578 if (mailbox != 0) {
3579 /* load FPGA */
3580 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, NULL,
3581 base_addr);
3582 if (retval)
3583 goto err_rel;
3584 if (!__cyz_fpga_loaded(ctl_addr)) {
3585 dev_err(&pdev->dev, "fw upload successful, but fw is "
3586 "not loaded\n");
3587 goto err_rel;
3588 }
3589 }
3590
3591 /* stops CPU and set window to beginning of RAM */
3592 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3593 cy_writel(&cust->cpu_stop, 0);
3594 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3595 udelay(100);
3596
3597 /* clear memory */
3598 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
3599 cy_writeb(tmp, 255);
3600 if (mailbox != 0) {
3601 /* set window to last 512K of RAM */
3602 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM + RAM_SIZE);
3603 for (tmp = base_addr; tmp < base_addr + RAM_SIZE; tmp++)
3604 cy_writeb(tmp, 255);
3605 /* set window to beginning of RAM */
3606 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3607 }
3608
3609 retval = __cyz_load_fw(fw, "Cyclom-Z", mailbox, base_addr, NULL);
3610 release_firmware(fw);
3611 if (retval)
3612 goto err;
3613
3614 /* finish boot and start boards */
3615 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3616 cy_writel(&cust->cpu_start, 0);
3617 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3618 i = 0;
3619 while ((status = readl(&fid->signature)) != ZFIRM_ID && i++ < 40)
3620 msleep(100);
3621 if (status != ZFIRM_ID) {
3622 if (status == ZFIRM_HLT) {
3623 dev_err(&pdev->dev, "you need an external power supply "
3624 "for this number of ports. Firmware halted and "
3625 "board reset.\n");
3626 retval = -EIO;
3627 goto err;
3628 }
3629 dev_warn(&pdev->dev, "fid->signature = 0x%x... Waiting "
3630 "some more time\n", status);
3631 while ((status = readl(&fid->signature)) != ZFIRM_ID &&
3632 i++ < 200)
3633 msleep(100);
3634 if (status != ZFIRM_ID) {
3635 dev_err(&pdev->dev, "Board not started in 20 seconds! "
3636 "Giving up. (fid->signature = 0x%x)\n",
3637 status);
3638 dev_info(&pdev->dev, "*** Warning ***: if you are "
3639 "upgrading the FW, please power cycle the "
3640 "system before loading the new FW to the "
3641 "Cyclades-Z.\n");
3642
3643 if (__cyz_fpga_loaded(ctl_addr))
3644 plx_init(pdev, irq, ctl_addr);
3645
3646 retval = -EIO;
3647 goto err;
3648 }
3649 dev_dbg(&pdev->dev, "Firmware started after %d seconds.\n",
3650 i / 10);
3651 }
3652 pt_zfwctrl = base_addr + readl(&fid->zfwctrl_addr);
3653
3654 dev_dbg(&pdev->dev, "fid=> %p, zfwctrl_addr=> %x, npt_zfwctrl=> %p\n",
3655 base_addr + ID_ADDRESS, readl(&fid->zfwctrl_addr),
3656 base_addr + readl(&fid->zfwctrl_addr));
3657
3658 nchan = readl(&pt_zfwctrl->board_ctrl.n_channel);
3659 dev_info(&pdev->dev, "Cyclades-Z FW loaded: version = %x, ports = %u\n",
3660 readl(&pt_zfwctrl->board_ctrl.fw_version), nchan);
3661
3662 if (nchan == 0) {
3663 dev_warn(&pdev->dev, "no Cyclades-Z ports were found. Please "
3664 "check the connection between the Z host card and the "
3665 "serial expanders.\n");
3666
3667 if (__cyz_fpga_loaded(ctl_addr))
3668 plx_init(pdev, irq, ctl_addr);
3669
3670 dev_info(&pdev->dev, "Null number of ports detected. Board "
3671 "reset.\n");
3672 retval = 0;
3673 goto err;
3674 }
3675
3676 cy_writel(&pt_zfwctrl->board_ctrl.op_system, C_OS_LINUX);
3677 cy_writel(&pt_zfwctrl->board_ctrl.dr_version, DRIVER_VERSION);
3678
3679 /*
3680 Early firmware failed to start looking for commands.
3681 This enables firmware interrupts for those commands.
3682 */
3683 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
3684 (1 << 17));
3685 cy_writel(&ctl_addr->intr_ctrl_stat, readl(&ctl_addr->intr_ctrl_stat) |
3686 0x00030800UL);
3687
3688 return nchan;
3689err_rel:
3690 release_firmware(fw);
3691err:
3692 return retval;
3693}
3694
3695static int __devinit cy_pci_probe(struct pci_dev *pdev,
3696 const struct pci_device_id *ent)
3697{
3698 void __iomem *addr0 = NULL, *addr2 = NULL;
3699 char *card_name = NULL;
3700 u32 uninitialized_var(mailbox);
3701 unsigned int device_id, nchan = 0, card_no, i;
3702 unsigned char plx_ver;
3703 int retval, irq;
3704
3705 retval = pci_enable_device(pdev);
3706 if (retval) {
3707 dev_err(&pdev->dev, "cannot enable device\n");
3708 goto err;
3709 }
3710
3711 /* read PCI configuration area */
3712 irq = pdev->irq;
3713 device_id = pdev->device & ~PCI_DEVICE_ID_MASK;
3714
3715#if defined(__alpha__)
3716 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo) { /* below 1M? */
3717 dev_err(&pdev->dev, "Cyclom-Y/PCI not supported for low "
3718 "addresses on Alpha systems.\n");
3719 retval = -EIO;
3720 goto err_dis;
3721 }
3722#endif
3723 if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Lo) {
3724 dev_err(&pdev->dev, "Cyclades-Z/PCI not supported for low "
3725 "addresses\n");
3726 retval = -EIO;
3727 goto err_dis;
3728 }
3729
3730 if (pci_resource_flags(pdev, 2) & IORESOURCE_IO) {
3731 dev_warn(&pdev->dev, "PCI I/O bit incorrectly set. Ignoring "
3732 "it...\n");
3733 pdev->resource[2].flags &= ~IORESOURCE_IO;
3734 }
3735
3736 retval = pci_request_regions(pdev, "cyclades");
3737 if (retval) {
3738 dev_err(&pdev->dev, "failed to reserve resources\n");
3739 goto err_dis;
3740 }
3741
3742 retval = -EIO;
3743 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
3744 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3745 card_name = "Cyclom-Y";
3746
3747 addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
3748 CyPCI_Yctl);
3749 if (addr0 == NULL) {
3750 dev_err(&pdev->dev, "can't remap ctl region\n");
3751 goto err_reg;
3752 }
3753 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
3754 CyPCI_Ywin);
3755 if (addr2 == NULL) {
3756 dev_err(&pdev->dev, "can't remap base region\n");
3757 goto err_unmap;
3758 }
3759
3760 nchan = CyPORTS_PER_CHIP * cyy_init_card(addr2, 1);
3761 if (nchan == 0) {
3762 dev_err(&pdev->dev, "Cyclom-Y PCI host card with no "
3763 "Serial-Modules\n");
3764 goto err_unmap;
3765 }
3766 } else if (device_id == PCI_DEVICE_ID_CYCLOM_Z_Hi) {
3767 struct RUNTIME_9060 __iomem *ctl_addr;
3768
3769 ctl_addr = addr0 = ioremap_nocache(pci_resource_start(pdev, 0),
3770 CyPCI_Zctl);
3771 if (addr0 == NULL) {
3772 dev_err(&pdev->dev, "can't remap ctl region\n");
3773 goto err_reg;
3774 }
3775
3776 /* Disable interrupts on the PLX before resetting it */
3777 cy_writew(&ctl_addr->intr_ctrl_stat,
3778 readw(&ctl_addr->intr_ctrl_stat) & ~0x0900);
3779
3780 plx_init(pdev, irq, addr0);
3781
3782 mailbox = readl(&ctl_addr->mail_box_0);
3783
3784 addr2 = ioremap_nocache(pci_resource_start(pdev, 2),
3785 mailbox == ZE_V1 ? CyPCI_Ze_win : CyPCI_Zwin);
3786 if (addr2 == NULL) {
3787 dev_err(&pdev->dev, "can't remap base region\n");
3788 goto err_unmap;
3789 }
3790
3791 if (mailbox == ZE_V1) {
3792 card_name = "Cyclades-Ze";
3793 } else {
3794 card_name = "Cyclades-8Zo";
3795#ifdef CY_PCI_DEBUG
3796 if (mailbox == ZO_V1) {
3797 cy_writel(&ctl_addr->loc_addr_base, WIN_CREG);
3798 dev_info(&pdev->dev, "Cyclades-8Zo/PCI: FPGA "
3799 "id %lx, ver %lx\n", (ulong)(0xff &
3800 readl(&((struct CUSTOM_REG *)addr2)->
3801 fpga_id)), (ulong)(0xff &
3802 readl(&((struct CUSTOM_REG *)addr2)->
3803 fpga_version)));
3804 cy_writel(&ctl_addr->loc_addr_base, WIN_RAM);
3805 } else {
3806 dev_info(&pdev->dev, "Cyclades-Z/PCI: New "
3807 "Cyclades-Z board. FPGA not loaded\n");
3808 }
3809#endif
3810 /* The following clears the firmware id word. This
3811 ensures that the driver will not attempt to talk to
3812 the board until it has been properly initialized.
3813 */
3814 if ((mailbox == ZO_V1) || (mailbox == ZO_V2))
3815 cy_writel(addr2 + ID_ADDRESS, 0L);
3816 }
3817
3818 retval = cyz_load_fw(pdev, addr2, addr0, irq);
3819 if (retval <= 0)
3820 goto err_unmap;
3821 nchan = retval;
3822 }
3823
3824 if ((cy_next_channel + nchan) > NR_PORTS) {
3825 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
3826 "channels are available. Change NR_PORTS in "
3827 "cyclades.c and recompile kernel.\n");
3828 goto err_unmap;
3829 }
3830 /* fill the next cy_card structure available */
3831 for (card_no = 0; card_no < NR_CARDS; card_no++) {
3832 if (cy_card[card_no].base_addr == NULL)
3833 break;
3834 }
3835 if (card_no == NR_CARDS) { /* no more cy_cards available */
3836 dev_err(&pdev->dev, "Cyclades-8Zo/PCI found, but no "
3837 "more cards can be used. Change NR_CARDS in "
3838 "cyclades.c and recompile kernel.\n");
3839 goto err_unmap;
3840 }
3841
3842 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
3843 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3844 /* allocate IRQ */
3845 retval = request_irq(irq, cyy_interrupt,
3846 IRQF_SHARED, "Cyclom-Y", &cy_card[card_no]);
3847 if (retval) {
3848 dev_err(&pdev->dev, "could not allocate IRQ\n");
3849 goto err_unmap;
3850 }
3851 cy_card[card_no].num_chips = nchan / CyPORTS_PER_CHIP;
3852 } else {
3853 struct FIRM_ID __iomem *firm_id = addr2 + ID_ADDRESS;
3854 struct ZFW_CTRL __iomem *zfw_ctrl;
3855
3856 zfw_ctrl = addr2 + (readl(&firm_id->zfwctrl_addr) & 0xfffff);
3857
3858 cy_card[card_no].hw_ver = mailbox;
3859 cy_card[card_no].num_chips = (unsigned int)-1;
3860 cy_card[card_no].board_ctrl = &zfw_ctrl->board_ctrl;
3861#ifdef CONFIG_CYZ_INTR
3862 /* allocate IRQ only if board has an IRQ */
3863 if (irq != 0 && irq != 255) {
3864 retval = request_irq(irq, cyz_interrupt,
3865 IRQF_SHARED, "Cyclades-Z",
3866 &cy_card[card_no]);
3867 if (retval) {
3868 dev_err(&pdev->dev, "could not allocate IRQ\n");
3869 goto err_unmap;
3870 }
3871 }
3872#endif /* CONFIG_CYZ_INTR */
3873 }
3874
3875 /* set cy_card */
3876 cy_card[card_no].base_addr = addr2;
3877 cy_card[card_no].ctl_addr.p9050 = addr0;
3878 cy_card[card_no].irq = irq;
3879 cy_card[card_no].bus_index = 1;
3880 cy_card[card_no].first_line = cy_next_channel;
3881 cy_card[card_no].nports = nchan;
3882 retval = cy_init_card(&cy_card[card_no]);
3883 if (retval)
3884 goto err_null;
3885
3886 pci_set_drvdata(pdev, &cy_card[card_no]);
3887
3888 if (device_id == PCI_DEVICE_ID_CYCLOM_Y_Lo ||
3889 device_id == PCI_DEVICE_ID_CYCLOM_Y_Hi) {
3890 /* enable interrupts in the PCI interface */
3891 plx_ver = readb(addr2 + CyPLX_VER) & 0x0f;
3892 switch (plx_ver) {
3893 case PLX_9050:
3894 cy_writeb(addr0 + 0x4c, 0x43);
3895 break;
3896
3897 case PLX_9060:
3898 case PLX_9080:
3899 default: /* Old boards, use PLX_9060 */
3900 {
3901 struct RUNTIME_9060 __iomem *ctl_addr = addr0;
3902 plx_init(pdev, irq, ctl_addr);
3903 cy_writew(&ctl_addr->intr_ctrl_stat,
3904 readw(&ctl_addr->intr_ctrl_stat) | 0x0900);
3905 break;
3906 }
3907 }
3908 }
3909
3910 dev_info(&pdev->dev, "%s/PCI #%d found: %d channels starting from "
3911 "port %d.\n", card_name, card_no + 1, nchan, cy_next_channel);
3912 for (i = cy_next_channel; i < cy_next_channel + nchan; i++)
3913 tty_register_device(cy_serial_driver, i, &pdev->dev);
3914 cy_next_channel += nchan;
3915
3916 return 0;
3917err_null:
3918 cy_card[card_no].base_addr = NULL;
3919 free_irq(irq, &cy_card[card_no]);
3920err_unmap:
3921 iounmap(addr0);
3922 if (addr2)
3923 iounmap(addr2);
3924err_reg:
3925 pci_release_regions(pdev);
3926err_dis:
3927 pci_disable_device(pdev);
3928err:
3929 return retval;
3930}
3931
3932static void __devexit cy_pci_remove(struct pci_dev *pdev)
3933{
3934 struct cyclades_card *cinfo = pci_get_drvdata(pdev);
3935 unsigned int i;
3936
3937 /* non-Z with old PLX */
3938 if (!cy_is_Z(cinfo) && (readb(cinfo->base_addr + CyPLX_VER) & 0x0f) ==
3939 PLX_9050)
3940 cy_writeb(cinfo->ctl_addr.p9050 + 0x4c, 0);
3941 else
3942#ifndef CONFIG_CYZ_INTR
3943 if (!cy_is_Z(cinfo))
3944#endif
3945 cy_writew(&cinfo->ctl_addr.p9060->intr_ctrl_stat,
3946 readw(&cinfo->ctl_addr.p9060->intr_ctrl_stat) &
3947 ~0x0900);
3948
3949 iounmap(cinfo->base_addr);
3950 if (cinfo->ctl_addr.p9050)
3951 iounmap(cinfo->ctl_addr.p9050);
3952 if (cinfo->irq
3953#ifndef CONFIG_CYZ_INTR
3954 && !cy_is_Z(cinfo)
3955#endif /* CONFIG_CYZ_INTR */
3956 )
3957 free_irq(cinfo->irq, cinfo);
3958 pci_release_regions(pdev);
3959
3960 cinfo->base_addr = NULL;
3961 for (i = cinfo->first_line; i < cinfo->first_line +
3962 cinfo->nports; i++)
3963 tty_unregister_device(cy_serial_driver, i);
3964 cinfo->nports = 0;
3965 kfree(cinfo->ports);
3966}
3967
3968static struct pci_driver cy_pci_driver = {
3969 .name = "cyclades",
3970 .id_table = cy_pci_dev_id,
3971 .probe = cy_pci_probe,
3972 .remove = __devexit_p(cy_pci_remove)
3973};
3974#endif
3975
3976static int cyclades_proc_show(struct seq_file *m, void *v)
3977{
3978 struct cyclades_port *info;
3979 unsigned int i, j;
3980 __u32 cur_jifs = jiffies;
3981
3982 seq_puts(m, "Dev TimeOpen BytesOut IdleOut BytesIn "
3983 "IdleIn Overruns Ldisc\n");
3984
3985 /* Output one line for each known port */
3986 for (i = 0; i < NR_CARDS; i++)
3987 for (j = 0; j < cy_card[i].nports; j++) {
3988 info = &cy_card[i].ports[j];
3989
3990 if (info->port.count) {
3991 /* XXX is the ldisc num worth this? */
3992 struct tty_struct *tty;
3993 struct tty_ldisc *ld;
3994 int num = 0;
3995 tty = tty_port_tty_get(&info->port);
3996 if (tty) {
3997 ld = tty_ldisc_ref(tty);
3998 if (ld) {
3999 num = ld->ops->num;
4000 tty_ldisc_deref(ld);
4001 }
4002 tty_kref_put(tty);
4003 }
4004 seq_printf(m, "%3d %8lu %10lu %8lu "
4005 "%10lu %8lu %9lu %6d\n", info->line,
4006 (cur_jifs - info->idle_stats.in_use) /
4007 HZ, info->idle_stats.xmit_bytes,
4008 (cur_jifs - info->idle_stats.xmit_idle)/
4009 HZ, info->idle_stats.recv_bytes,
4010 (cur_jifs - info->idle_stats.recv_idle)/
4011 HZ, info->idle_stats.overruns,
4012 num);
4013 } else
4014 seq_printf(m, "%3d %8lu %10lu %8lu "
4015 "%10lu %8lu %9lu %6ld\n",
4016 info->line, 0L, 0L, 0L, 0L, 0L, 0L, 0L);
4017 }
4018 return 0;
4019}
4020
4021static int cyclades_proc_open(struct inode *inode, struct file *file)
4022{
4023 return single_open(file, cyclades_proc_show, NULL);
4024}
4025
4026static const struct file_operations cyclades_proc_fops = {
4027 .owner = THIS_MODULE,
4028 .open = cyclades_proc_open,
4029 .read = seq_read,
4030 .llseek = seq_lseek,
4031 .release = single_release,
4032};
4033
4034/* The serial driver boot-time initialization code!
4035 Hardware I/O ports are mapped to character special devices on a
4036 first found, first allocated manner. That is, this code searches
4037 for Cyclom cards in the system. As each is found, it is probed
4038 to discover how many chips (and thus how many ports) are present.
4039 These ports are mapped to the tty ports 32 and upward in monotonic
4040 fashion. If an 8-port card is replaced with a 16-port card, the
4041 port mapping on a following card will shift.
4042
4043 This approach is different from what is used in the other serial
4044 device driver because the Cyclom is more properly a multiplexer,
4045 not just an aggregation of serial ports on one card.
4046
4047 If there are more cards with more ports than have been
4048 statically allocated above, a warning is printed and the
4049 extra ports are ignored.
4050 */
4051
4052static const struct tty_operations cy_ops = {
4053 .open = cy_open,
4054 .close = cy_close,
4055 .write = cy_write,
4056 .put_char = cy_put_char,
4057 .flush_chars = cy_flush_chars,
4058 .write_room = cy_write_room,
4059 .chars_in_buffer = cy_chars_in_buffer,
4060 .flush_buffer = cy_flush_buffer,
4061 .ioctl = cy_ioctl,
4062 .throttle = cy_throttle,
4063 .unthrottle = cy_unthrottle,
4064 .set_termios = cy_set_termios,
4065 .stop = cy_stop,
4066 .start = cy_start,
4067 .hangup = cy_hangup,
4068 .break_ctl = cy_break,
4069 .wait_until_sent = cy_wait_until_sent,
4070 .tiocmget = cy_tiocmget,
4071 .tiocmset = cy_tiocmset,
4072 .get_icount = cy_get_icount,
4073 .proc_fops = &cyclades_proc_fops,
4074};
4075
4076static int __init cy_init(void)
4077{
4078 unsigned int nboards;
4079 int retval = -ENOMEM;
4080
4081 cy_serial_driver = alloc_tty_driver(NR_PORTS);
4082 if (!cy_serial_driver)
4083 goto err;
4084
4085 printk(KERN_INFO "Cyclades driver " CY_VERSION "\n");
4086
4087 /* Initialize the tty_driver structure */
4088
4089 cy_serial_driver->driver_name = "cyclades";
4090 cy_serial_driver->name = "ttyC";
4091 cy_serial_driver->major = CYCLADES_MAJOR;
4092 cy_serial_driver->minor_start = 0;
4093 cy_serial_driver->type = TTY_DRIVER_TYPE_SERIAL;
4094 cy_serial_driver->subtype = SERIAL_TYPE_NORMAL;
4095 cy_serial_driver->init_termios = tty_std_termios;
4096 cy_serial_driver->init_termios.c_cflag =
4097 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
4098 cy_serial_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_DYNAMIC_DEV;
4099 tty_set_operations(cy_serial_driver, &cy_ops);
4100
4101 retval = tty_register_driver(cy_serial_driver);
4102 if (retval) {
4103 printk(KERN_ERR "Couldn't register Cyclades serial driver\n");
4104 goto err_frtty;
4105 }
4106
4107 /* the code below is responsible to find the boards. Each different
4108 type of board has its own detection routine. If a board is found,
4109 the next cy_card structure available is set by the detection
4110 routine. These functions are responsible for checking the
4111 availability of cy_card and cy_port data structures and updating
4112 the cy_next_channel. */
4113
4114 /* look for isa boards */
4115 nboards = cy_detect_isa();
4116
4117#ifdef CONFIG_PCI
4118 /* look for pci boards */
4119 retval = pci_register_driver(&cy_pci_driver);
4120 if (retval && !nboards) {
4121 tty_unregister_driver(cy_serial_driver);
4122 goto err_frtty;
4123 }
4124#endif
4125
4126 return 0;
4127err_frtty:
4128 put_tty_driver(cy_serial_driver);
4129err:
4130 return retval;
4131} /* cy_init */
4132
4133static void __exit cy_cleanup_module(void)
4134{
4135 struct cyclades_card *card;
4136 unsigned int i, e1;
4137
4138#ifndef CONFIG_CYZ_INTR
4139 del_timer_sync(&cyz_timerlist);
4140#endif /* CONFIG_CYZ_INTR */
4141
4142 e1 = tty_unregister_driver(cy_serial_driver);
4143 if (e1)
4144 printk(KERN_ERR "failed to unregister Cyclades serial "
4145 "driver(%d)\n", e1);
4146
4147#ifdef CONFIG_PCI
4148 pci_unregister_driver(&cy_pci_driver);
4149#endif
4150
4151 for (i = 0; i < NR_CARDS; i++) {
4152 card = &cy_card[i];
4153 if (card->base_addr) {
4154 /* clear interrupt */
4155 cy_writeb(card->base_addr + Cy_ClrIntr, 0);
4156 iounmap(card->base_addr);
4157 if (card->ctl_addr.p9050)
4158 iounmap(card->ctl_addr.p9050);
4159 if (card->irq
4160#ifndef CONFIG_CYZ_INTR
4161 && !cy_is_Z(card)
4162#endif /* CONFIG_CYZ_INTR */
4163 )
4164 free_irq(card->irq, card);
4165 for (e1 = card->first_line; e1 < card->first_line +
4166 card->nports; e1++)
4167 tty_unregister_device(cy_serial_driver, e1);
4168 kfree(card->ports);
4169 }
4170 }
4171
4172 put_tty_driver(cy_serial_driver);
4173} /* cy_cleanup_module */
4174
4175module_init(cy_init);
4176module_exit(cy_cleanup_module);
4177
4178MODULE_LICENSE("GPL");
4179MODULE_VERSION(CY_VERSION);
4180MODULE_ALIAS_CHARDEV_MAJOR(CYCLADES_MAJOR);
4181MODULE_FIRMWARE("cyzfirm.bin");