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1/*
2 * mxser.c -- MOXA Smartio/Industio family multiport serial driver.
3 *
4 * Copyright (C) 1999-2006 Moxa Technologies (support@moxa.com).
5 * Copyright (C) 2006-2008 Jiri Slaby <jirislaby@gmail.com>
6 *
7 * This code is loosely based on the 1.8 moxa driver which is based on
8 * Linux serial driver, written by Linus Torvalds, Theodore T'so and
9 * others.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
17 * <alan@lxorguk.ukuu.org.uk>. The original 1.8 code is available on
18 * www.moxa.com.
19 * - Fixed x86_64 cleanness
20 */
21
22#include <linux/module.h>
23#include <linux/errno.h>
24#include <linux/signal.h>
25#include <linux/sched.h>
26#include <linux/timer.h>
27#include <linux/interrupt.h>
28#include <linux/tty.h>
29#include <linux/tty_flip.h>
30#include <linux/serial.h>
31#include <linux/serial_reg.h>
32#include <linux/major.h>
33#include <linux/string.h>
34#include <linux/fcntl.h>
35#include <linux/ptrace.h>
36#include <linux/ioport.h>
37#include <linux/mm.h>
38#include <linux/delay.h>
39#include <linux/pci.h>
40#include <linux/bitops.h>
41#include <linux/slab.h>
42#include <linux/ratelimit.h>
43
44#include <asm/system.h>
45#include <asm/io.h>
46#include <asm/irq.h>
47#include <asm/uaccess.h>
48
49#include "mxser.h"
50
51#define MXSER_VERSION "2.0.5" /* 1.14 */
52#define MXSERMAJOR 174
53
54#define MXSER_BOARDS 4 /* Max. boards */
55#define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
56#define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
57#define MXSER_ISR_PASS_LIMIT 100
58
59/*CheckIsMoxaMust return value*/
60#define MOXA_OTHER_UART 0x00
61#define MOXA_MUST_MU150_HWID 0x01
62#define MOXA_MUST_MU860_HWID 0x02
63
64#define WAKEUP_CHARS 256
65
66#define UART_MCR_AFE 0x20
67#define UART_LSR_SPECIAL 0x1E
68
69#define PCI_DEVICE_ID_POS104UL 0x1044
70#define PCI_DEVICE_ID_CB108 0x1080
71#define PCI_DEVICE_ID_CP102UF 0x1023
72#define PCI_DEVICE_ID_CP112UL 0x1120
73#define PCI_DEVICE_ID_CB114 0x1142
74#define PCI_DEVICE_ID_CP114UL 0x1143
75#define PCI_DEVICE_ID_CB134I 0x1341
76#define PCI_DEVICE_ID_CP138U 0x1380
77
78
79#define C168_ASIC_ID 1
80#define C104_ASIC_ID 2
81#define C102_ASIC_ID 0xB
82#define CI132_ASIC_ID 4
83#define CI134_ASIC_ID 3
84#define CI104J_ASIC_ID 5
85
86#define MXSER_HIGHBAUD 1
87#define MXSER_HAS2 2
88
89/* This is only for PCI */
90static const struct {
91 int type;
92 int tx_fifo;
93 int rx_fifo;
94 int xmit_fifo_size;
95 int rx_high_water;
96 int rx_trigger;
97 int rx_low_water;
98 long max_baud;
99} Gpci_uart_info[] = {
100 {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
101 {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
102 {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
103};
104#define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info)
105
106struct mxser_cardinfo {
107 char *name;
108 unsigned int nports;
109 unsigned int flags;
110};
111
112static const struct mxser_cardinfo mxser_cards[] = {
113/* 0*/ { "C168 series", 8, },
114 { "C104 series", 4, },
115 { "CI-104J series", 4, },
116 { "C168H/PCI series", 8, },
117 { "C104H/PCI series", 4, },
118/* 5*/ { "C102 series", 4, MXSER_HAS2 }, /* C102-ISA */
119 { "CI-132 series", 4, MXSER_HAS2 },
120 { "CI-134 series", 4, },
121 { "CP-132 series", 2, },
122 { "CP-114 series", 4, },
123/*10*/ { "CT-114 series", 4, },
124 { "CP-102 series", 2, MXSER_HIGHBAUD },
125 { "CP-104U series", 4, },
126 { "CP-168U series", 8, },
127 { "CP-132U series", 2, },
128/*15*/ { "CP-134U series", 4, },
129 { "CP-104JU series", 4, },
130 { "Moxa UC7000 Serial", 8, }, /* RC7000 */
131 { "CP-118U series", 8, },
132 { "CP-102UL series", 2, },
133/*20*/ { "CP-102U series", 2, },
134 { "CP-118EL series", 8, },
135 { "CP-168EL series", 8, },
136 { "CP-104EL series", 4, },
137 { "CB-108 series", 8, },
138/*25*/ { "CB-114 series", 4, },
139 { "CB-134I series", 4, },
140 { "CP-138U series", 8, },
141 { "POS-104UL series", 4, },
142 { "CP-114UL series", 4, },
143/*30*/ { "CP-102UF series", 2, },
144 { "CP-112UL series", 2, },
145};
146
147/* driver_data correspond to the lines in the structure above
148 see also ISA probe function before you change something */
149static struct pci_device_id mxser_pcibrds[] = {
150 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168), .driver_data = 3 },
151 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104), .driver_data = 4 },
152 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132), .driver_data = 8 },
153 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114), .driver_data = 9 },
154 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114), .driver_data = 10 },
155 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102), .driver_data = 11 },
156 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 },
157 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 },
158 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 },
159 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 },
160 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 },
161 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 },
162 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 },
163 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 },
164 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 },
165 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 },
166 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 },
167 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 },
168 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108), .driver_data = 24 },
169 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114), .driver_data = 25 },
170 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I), .driver_data = 26 },
171 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U), .driver_data = 27 },
172 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL), .driver_data = 28 },
173 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL), .driver_data = 29 },
174 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP102UF), .driver_data = 30 },
175 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP112UL), .driver_data = 31 },
176 { }
177};
178MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
179
180static unsigned long ioaddr[MXSER_BOARDS];
181static int ttymajor = MXSERMAJOR;
182
183/* Variables for insmod */
184
185MODULE_AUTHOR("Casper Yang");
186MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
187module_param_array(ioaddr, ulong, NULL, 0);
188MODULE_PARM_DESC(ioaddr, "ISA io addresses to look for a moxa board");
189module_param(ttymajor, int, 0);
190MODULE_LICENSE("GPL");
191
192struct mxser_log {
193 int tick;
194 unsigned long rxcnt[MXSER_PORTS];
195 unsigned long txcnt[MXSER_PORTS];
196};
197
198struct mxser_mon {
199 unsigned long rxcnt;
200 unsigned long txcnt;
201 unsigned long up_rxcnt;
202 unsigned long up_txcnt;
203 int modem_status;
204 unsigned char hold_reason;
205};
206
207struct mxser_mon_ext {
208 unsigned long rx_cnt[32];
209 unsigned long tx_cnt[32];
210 unsigned long up_rxcnt[32];
211 unsigned long up_txcnt[32];
212 int modem_status[32];
213
214 long baudrate[32];
215 int databits[32];
216 int stopbits[32];
217 int parity[32];
218 int flowctrl[32];
219 int fifo[32];
220 int iftype[32];
221};
222
223struct mxser_board;
224
225struct mxser_port {
226 struct tty_port port;
227 struct mxser_board *board;
228
229 unsigned long ioaddr;
230 unsigned long opmode_ioaddr;
231 int max_baud;
232
233 int rx_high_water;
234 int rx_trigger; /* Rx fifo trigger level */
235 int rx_low_water;
236 int baud_base; /* max. speed */
237 int type; /* UART type */
238
239 int x_char; /* xon/xoff character */
240 int IER; /* Interrupt Enable Register */
241 int MCR; /* Modem control register */
242
243 unsigned char stop_rx;
244 unsigned char ldisc_stop_rx;
245
246 int custom_divisor;
247 unsigned char err_shadow;
248
249 struct async_icount icount; /* kernel counters for 4 input interrupts */
250 int timeout;
251
252 int read_status_mask;
253 int ignore_status_mask;
254 int xmit_fifo_size;
255 int xmit_head;
256 int xmit_tail;
257 int xmit_cnt;
258
259 struct ktermios normal_termios;
260
261 struct mxser_mon mon_data;
262
263 spinlock_t slock;
264};
265
266struct mxser_board {
267 unsigned int idx;
268 int irq;
269 const struct mxser_cardinfo *info;
270 unsigned long vector;
271 unsigned long vector_mask;
272
273 int chip_flag;
274 int uart_type;
275
276 struct mxser_port ports[MXSER_PORTS_PER_BOARD];
277};
278
279struct mxser_mstatus {
280 tcflag_t cflag;
281 int cts;
282 int dsr;
283 int ri;
284 int dcd;
285};
286
287static struct mxser_board mxser_boards[MXSER_BOARDS];
288static struct tty_driver *mxvar_sdriver;
289static struct mxser_log mxvar_log;
290static int mxser_set_baud_method[MXSER_PORTS + 1];
291
292static void mxser_enable_must_enchance_mode(unsigned long baseio)
293{
294 u8 oldlcr;
295 u8 efr;
296
297 oldlcr = inb(baseio + UART_LCR);
298 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
299
300 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
301 efr |= MOXA_MUST_EFR_EFRB_ENABLE;
302
303 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
304 outb(oldlcr, baseio + UART_LCR);
305}
306
307#ifdef CONFIG_PCI
308static void mxser_disable_must_enchance_mode(unsigned long baseio)
309{
310 u8 oldlcr;
311 u8 efr;
312
313 oldlcr = inb(baseio + UART_LCR);
314 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
315
316 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
317 efr &= ~MOXA_MUST_EFR_EFRB_ENABLE;
318
319 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
320 outb(oldlcr, baseio + UART_LCR);
321}
322#endif
323
324static void mxser_set_must_xon1_value(unsigned long baseio, u8 value)
325{
326 u8 oldlcr;
327 u8 efr;
328
329 oldlcr = inb(baseio + UART_LCR);
330 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
331
332 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
333 efr &= ~MOXA_MUST_EFR_BANK_MASK;
334 efr |= MOXA_MUST_EFR_BANK0;
335
336 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
337 outb(value, baseio + MOXA_MUST_XON1_REGISTER);
338 outb(oldlcr, baseio + UART_LCR);
339}
340
341static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value)
342{
343 u8 oldlcr;
344 u8 efr;
345
346 oldlcr = inb(baseio + UART_LCR);
347 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
348
349 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
350 efr &= ~MOXA_MUST_EFR_BANK_MASK;
351 efr |= MOXA_MUST_EFR_BANK0;
352
353 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
354 outb(value, baseio + MOXA_MUST_XOFF1_REGISTER);
355 outb(oldlcr, baseio + UART_LCR);
356}
357
358static void mxser_set_must_fifo_value(struct mxser_port *info)
359{
360 u8 oldlcr;
361 u8 efr;
362
363 oldlcr = inb(info->ioaddr + UART_LCR);
364 outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR);
365
366 efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER);
367 efr &= ~MOXA_MUST_EFR_BANK_MASK;
368 efr |= MOXA_MUST_EFR_BANK1;
369
370 outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER);
371 outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER);
372 outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER);
373 outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER);
374 outb(oldlcr, info->ioaddr + UART_LCR);
375}
376
377static void mxser_set_must_enum_value(unsigned long baseio, u8 value)
378{
379 u8 oldlcr;
380 u8 efr;
381
382 oldlcr = inb(baseio + UART_LCR);
383 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
384
385 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
386 efr &= ~MOXA_MUST_EFR_BANK_MASK;
387 efr |= MOXA_MUST_EFR_BANK2;
388
389 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
390 outb(value, baseio + MOXA_MUST_ENUM_REGISTER);
391 outb(oldlcr, baseio + UART_LCR);
392}
393
394#ifdef CONFIG_PCI
395static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId)
396{
397 u8 oldlcr;
398 u8 efr;
399
400 oldlcr = inb(baseio + UART_LCR);
401 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
402
403 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
404 efr &= ~MOXA_MUST_EFR_BANK_MASK;
405 efr |= MOXA_MUST_EFR_BANK2;
406
407 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
408 *pId = inb(baseio + MOXA_MUST_HWID_REGISTER);
409 outb(oldlcr, baseio + UART_LCR);
410}
411#endif
412
413static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio)
414{
415 u8 oldlcr;
416 u8 efr;
417
418 oldlcr = inb(baseio + UART_LCR);
419 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
420
421 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
422 efr &= ~MOXA_MUST_EFR_SF_MASK;
423
424 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
425 outb(oldlcr, baseio + UART_LCR);
426}
427
428static void mxser_enable_must_tx_software_flow_control(unsigned long baseio)
429{
430 u8 oldlcr;
431 u8 efr;
432
433 oldlcr = inb(baseio + UART_LCR);
434 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
435
436 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
437 efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
438 efr |= MOXA_MUST_EFR_SF_TX1;
439
440 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
441 outb(oldlcr, baseio + UART_LCR);
442}
443
444static void mxser_disable_must_tx_software_flow_control(unsigned long baseio)
445{
446 u8 oldlcr;
447 u8 efr;
448
449 oldlcr = inb(baseio + UART_LCR);
450 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
451
452 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
453 efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
454
455 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
456 outb(oldlcr, baseio + UART_LCR);
457}
458
459static void mxser_enable_must_rx_software_flow_control(unsigned long baseio)
460{
461 u8 oldlcr;
462 u8 efr;
463
464 oldlcr = inb(baseio + UART_LCR);
465 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
466
467 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
468 efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
469 efr |= MOXA_MUST_EFR_SF_RX1;
470
471 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
472 outb(oldlcr, baseio + UART_LCR);
473}
474
475static void mxser_disable_must_rx_software_flow_control(unsigned long baseio)
476{
477 u8 oldlcr;
478 u8 efr;
479
480 oldlcr = inb(baseio + UART_LCR);
481 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
482
483 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
484 efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
485
486 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
487 outb(oldlcr, baseio + UART_LCR);
488}
489
490#ifdef CONFIG_PCI
491static int __devinit CheckIsMoxaMust(unsigned long io)
492{
493 u8 oldmcr, hwid;
494 int i;
495
496 outb(0, io + UART_LCR);
497 mxser_disable_must_enchance_mode(io);
498 oldmcr = inb(io + UART_MCR);
499 outb(0, io + UART_MCR);
500 mxser_set_must_xon1_value(io, 0x11);
501 if ((hwid = inb(io + UART_MCR)) != 0) {
502 outb(oldmcr, io + UART_MCR);
503 return MOXA_OTHER_UART;
504 }
505
506 mxser_get_must_hardware_id(io, &hwid);
507 for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
508 if (hwid == Gpci_uart_info[i].type)
509 return (int)hwid;
510 }
511 return MOXA_OTHER_UART;
512}
513#endif
514
515static void process_txrx_fifo(struct mxser_port *info)
516{
517 int i;
518
519 if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
520 info->rx_trigger = 1;
521 info->rx_high_water = 1;
522 info->rx_low_water = 1;
523 info->xmit_fifo_size = 1;
524 } else
525 for (i = 0; i < UART_INFO_NUM; i++)
526 if (info->board->chip_flag == Gpci_uart_info[i].type) {
527 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
528 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
529 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
530 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
531 break;
532 }
533}
534
535static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
536{
537 static unsigned char mxser_msr[MXSER_PORTS + 1];
538 unsigned char status = 0;
539
540 status = inb(baseaddr + UART_MSR);
541
542 mxser_msr[port] &= 0x0F;
543 mxser_msr[port] |= status;
544 status = mxser_msr[port];
545 if (mode)
546 mxser_msr[port] = 0;
547
548 return status;
549}
550
551static int mxser_carrier_raised(struct tty_port *port)
552{
553 struct mxser_port *mp = container_of(port, struct mxser_port, port);
554 return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0;
555}
556
557static void mxser_dtr_rts(struct tty_port *port, int on)
558{
559 struct mxser_port *mp = container_of(port, struct mxser_port, port);
560 unsigned long flags;
561
562 spin_lock_irqsave(&mp->slock, flags);
563 if (on)
564 outb(inb(mp->ioaddr + UART_MCR) |
565 UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR);
566 else
567 outb(inb(mp->ioaddr + UART_MCR)&~(UART_MCR_DTR | UART_MCR_RTS),
568 mp->ioaddr + UART_MCR);
569 spin_unlock_irqrestore(&mp->slock, flags);
570}
571
572static int mxser_set_baud(struct tty_struct *tty, long newspd)
573{
574 struct mxser_port *info = tty->driver_data;
575 int quot = 0, baud;
576 unsigned char cval;
577
578 if (!info->ioaddr)
579 return -1;
580
581 if (newspd > info->max_baud)
582 return -1;
583
584 if (newspd == 134) {
585 quot = 2 * info->baud_base / 269;
586 tty_encode_baud_rate(tty, 134, 134);
587 } else if (newspd) {
588 quot = info->baud_base / newspd;
589 if (quot == 0)
590 quot = 1;
591 baud = info->baud_base/quot;
592 tty_encode_baud_rate(tty, baud, baud);
593 } else {
594 quot = 0;
595 }
596
597 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
598 info->timeout += HZ / 50; /* Add .02 seconds of slop */
599
600 if (quot) {
601 info->MCR |= UART_MCR_DTR;
602 outb(info->MCR, info->ioaddr + UART_MCR);
603 } else {
604 info->MCR &= ~UART_MCR_DTR;
605 outb(info->MCR, info->ioaddr + UART_MCR);
606 return 0;
607 }
608
609 cval = inb(info->ioaddr + UART_LCR);
610
611 outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
612
613 outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
614 outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
615 outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
616
617#ifdef BOTHER
618 if (C_BAUD(tty) == BOTHER) {
619 quot = info->baud_base % newspd;
620 quot *= 8;
621 if (quot % newspd > newspd / 2) {
622 quot /= newspd;
623 quot++;
624 } else
625 quot /= newspd;
626
627 mxser_set_must_enum_value(info->ioaddr, quot);
628 } else
629#endif
630 mxser_set_must_enum_value(info->ioaddr, 0);
631
632 return 0;
633}
634
635/*
636 * This routine is called to set the UART divisor registers to match
637 * the specified baud rate for a serial port.
638 */
639static int mxser_change_speed(struct tty_struct *tty,
640 struct ktermios *old_termios)
641{
642 struct mxser_port *info = tty->driver_data;
643 unsigned cflag, cval, fcr;
644 int ret = 0;
645 unsigned char status;
646
647 cflag = tty->termios->c_cflag;
648 if (!info->ioaddr)
649 return ret;
650
651 if (mxser_set_baud_method[tty->index] == 0)
652 mxser_set_baud(tty, tty_get_baud_rate(tty));
653
654 /* byte size and parity */
655 switch (cflag & CSIZE) {
656 case CS5:
657 cval = 0x00;
658 break;
659 case CS6:
660 cval = 0x01;
661 break;
662 case CS7:
663 cval = 0x02;
664 break;
665 case CS8:
666 cval = 0x03;
667 break;
668 default:
669 cval = 0x00;
670 break; /* too keep GCC shut... */
671 }
672 if (cflag & CSTOPB)
673 cval |= 0x04;
674 if (cflag & PARENB)
675 cval |= UART_LCR_PARITY;
676 if (!(cflag & PARODD))
677 cval |= UART_LCR_EPAR;
678 if (cflag & CMSPAR)
679 cval |= UART_LCR_SPAR;
680
681 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
682 if (info->board->chip_flag) {
683 fcr = UART_FCR_ENABLE_FIFO;
684 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
685 mxser_set_must_fifo_value(info);
686 } else
687 fcr = 0;
688 } else {
689 fcr = UART_FCR_ENABLE_FIFO;
690 if (info->board->chip_flag) {
691 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
692 mxser_set_must_fifo_value(info);
693 } else {
694 switch (info->rx_trigger) {
695 case 1:
696 fcr |= UART_FCR_TRIGGER_1;
697 break;
698 case 4:
699 fcr |= UART_FCR_TRIGGER_4;
700 break;
701 case 8:
702 fcr |= UART_FCR_TRIGGER_8;
703 break;
704 default:
705 fcr |= UART_FCR_TRIGGER_14;
706 break;
707 }
708 }
709 }
710
711 /* CTS flow control flag and modem status interrupts */
712 info->IER &= ~UART_IER_MSI;
713 info->MCR &= ~UART_MCR_AFE;
714 if (cflag & CRTSCTS) {
715 info->port.flags |= ASYNC_CTS_FLOW;
716 info->IER |= UART_IER_MSI;
717 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
718 info->MCR |= UART_MCR_AFE;
719 } else {
720 status = inb(info->ioaddr + UART_MSR);
721 if (tty->hw_stopped) {
722 if (status & UART_MSR_CTS) {
723 tty->hw_stopped = 0;
724 if (info->type != PORT_16550A &&
725 !info->board->chip_flag) {
726 outb(info->IER & ~UART_IER_THRI,
727 info->ioaddr +
728 UART_IER);
729 info->IER |= UART_IER_THRI;
730 outb(info->IER, info->ioaddr +
731 UART_IER);
732 }
733 tty_wakeup(tty);
734 }
735 } else {
736 if (!(status & UART_MSR_CTS)) {
737 tty->hw_stopped = 1;
738 if ((info->type != PORT_16550A) &&
739 (!info->board->chip_flag)) {
740 info->IER &= ~UART_IER_THRI;
741 outb(info->IER, info->ioaddr +
742 UART_IER);
743 }
744 }
745 }
746 }
747 } else {
748 info->port.flags &= ~ASYNC_CTS_FLOW;
749 }
750 outb(info->MCR, info->ioaddr + UART_MCR);
751 if (cflag & CLOCAL) {
752 info->port.flags &= ~ASYNC_CHECK_CD;
753 } else {
754 info->port.flags |= ASYNC_CHECK_CD;
755 info->IER |= UART_IER_MSI;
756 }
757 outb(info->IER, info->ioaddr + UART_IER);
758
759 /*
760 * Set up parity check flag
761 */
762 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
763 if (I_INPCK(tty))
764 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
765 if (I_BRKINT(tty) || I_PARMRK(tty))
766 info->read_status_mask |= UART_LSR_BI;
767
768 info->ignore_status_mask = 0;
769
770 if (I_IGNBRK(tty)) {
771 info->ignore_status_mask |= UART_LSR_BI;
772 info->read_status_mask |= UART_LSR_BI;
773 /*
774 * If we're ignore parity and break indicators, ignore
775 * overruns too. (For real raw support).
776 */
777 if (I_IGNPAR(tty)) {
778 info->ignore_status_mask |=
779 UART_LSR_OE |
780 UART_LSR_PE |
781 UART_LSR_FE;
782 info->read_status_mask |=
783 UART_LSR_OE |
784 UART_LSR_PE |
785 UART_LSR_FE;
786 }
787 }
788 if (info->board->chip_flag) {
789 mxser_set_must_xon1_value(info->ioaddr, START_CHAR(tty));
790 mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(tty));
791 if (I_IXON(tty)) {
792 mxser_enable_must_rx_software_flow_control(
793 info->ioaddr);
794 } else {
795 mxser_disable_must_rx_software_flow_control(
796 info->ioaddr);
797 }
798 if (I_IXOFF(tty)) {
799 mxser_enable_must_tx_software_flow_control(
800 info->ioaddr);
801 } else {
802 mxser_disable_must_tx_software_flow_control(
803 info->ioaddr);
804 }
805 }
806
807
808 outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
809 outb(cval, info->ioaddr + UART_LCR);
810
811 return ret;
812}
813
814static void mxser_check_modem_status(struct tty_struct *tty,
815 struct mxser_port *port, int status)
816{
817 /* update input line counters */
818 if (status & UART_MSR_TERI)
819 port->icount.rng++;
820 if (status & UART_MSR_DDSR)
821 port->icount.dsr++;
822 if (status & UART_MSR_DDCD)
823 port->icount.dcd++;
824 if (status & UART_MSR_DCTS)
825 port->icount.cts++;
826 port->mon_data.modem_status = status;
827 wake_up_interruptible(&port->port.delta_msr_wait);
828
829 if ((port->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
830 if (status & UART_MSR_DCD)
831 wake_up_interruptible(&port->port.open_wait);
832 }
833
834 if (port->port.flags & ASYNC_CTS_FLOW) {
835 if (tty->hw_stopped) {
836 if (status & UART_MSR_CTS) {
837 tty->hw_stopped = 0;
838
839 if ((port->type != PORT_16550A) &&
840 (!port->board->chip_flag)) {
841 outb(port->IER & ~UART_IER_THRI,
842 port->ioaddr + UART_IER);
843 port->IER |= UART_IER_THRI;
844 outb(port->IER, port->ioaddr +
845 UART_IER);
846 }
847 tty_wakeup(tty);
848 }
849 } else {
850 if (!(status & UART_MSR_CTS)) {
851 tty->hw_stopped = 1;
852 if (port->type != PORT_16550A &&
853 !port->board->chip_flag) {
854 port->IER &= ~UART_IER_THRI;
855 outb(port->IER, port->ioaddr +
856 UART_IER);
857 }
858 }
859 }
860 }
861}
862
863static int mxser_activate(struct tty_port *port, struct tty_struct *tty)
864{
865 struct mxser_port *info = container_of(port, struct mxser_port, port);
866 unsigned long page;
867 unsigned long flags;
868
869 page = __get_free_page(GFP_KERNEL);
870 if (!page)
871 return -ENOMEM;
872
873 spin_lock_irqsave(&info->slock, flags);
874
875 if (!info->ioaddr || !info->type) {
876 set_bit(TTY_IO_ERROR, &tty->flags);
877 free_page(page);
878 spin_unlock_irqrestore(&info->slock, flags);
879 return 0;
880 }
881 info->port.xmit_buf = (unsigned char *) page;
882
883 /*
884 * Clear the FIFO buffers and disable them
885 * (they will be reenabled in mxser_change_speed())
886 */
887 if (info->board->chip_flag)
888 outb((UART_FCR_CLEAR_RCVR |
889 UART_FCR_CLEAR_XMIT |
890 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
891 else
892 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
893 info->ioaddr + UART_FCR);
894
895 /*
896 * At this point there's no way the LSR could still be 0xFF;
897 * if it is, then bail out, because there's likely no UART
898 * here.
899 */
900 if (inb(info->ioaddr + UART_LSR) == 0xff) {
901 spin_unlock_irqrestore(&info->slock, flags);
902 if (capable(CAP_SYS_ADMIN)) {
903 set_bit(TTY_IO_ERROR, &tty->flags);
904 return 0;
905 } else
906 return -ENODEV;
907 }
908
909 /*
910 * Clear the interrupt registers.
911 */
912 (void) inb(info->ioaddr + UART_LSR);
913 (void) inb(info->ioaddr + UART_RX);
914 (void) inb(info->ioaddr + UART_IIR);
915 (void) inb(info->ioaddr + UART_MSR);
916
917 /*
918 * Now, initialize the UART
919 */
920 outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
921 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
922 outb(info->MCR, info->ioaddr + UART_MCR);
923
924 /*
925 * Finally, enable interrupts
926 */
927 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
928
929 if (info->board->chip_flag)
930 info->IER |= MOXA_MUST_IER_EGDAI;
931 outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
932
933 /*
934 * And clear the interrupt registers again for luck.
935 */
936 (void) inb(info->ioaddr + UART_LSR);
937 (void) inb(info->ioaddr + UART_RX);
938 (void) inb(info->ioaddr + UART_IIR);
939 (void) inb(info->ioaddr + UART_MSR);
940
941 clear_bit(TTY_IO_ERROR, &tty->flags);
942 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
943
944 /*
945 * and set the speed of the serial port
946 */
947 mxser_change_speed(tty, NULL);
948 spin_unlock_irqrestore(&info->slock, flags);
949
950 return 0;
951}
952
953/*
954 * This routine will shutdown a serial port
955 */
956static void mxser_shutdown_port(struct tty_port *port)
957{
958 struct mxser_port *info = container_of(port, struct mxser_port, port);
959 unsigned long flags;
960
961 spin_lock_irqsave(&info->slock, flags);
962
963 /*
964 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
965 * here so the queue might never be waken up
966 */
967 wake_up_interruptible(&info->port.delta_msr_wait);
968
969 /*
970 * Free the xmit buffer, if necessary
971 */
972 if (info->port.xmit_buf) {
973 free_page((unsigned long) info->port.xmit_buf);
974 info->port.xmit_buf = NULL;
975 }
976
977 info->IER = 0;
978 outb(0x00, info->ioaddr + UART_IER);
979
980 /* clear Rx/Tx FIFO's */
981 if (info->board->chip_flag)
982 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
983 MOXA_MUST_FCR_GDA_MODE_ENABLE,
984 info->ioaddr + UART_FCR);
985 else
986 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
987 info->ioaddr + UART_FCR);
988
989 /* read data port to reset things */
990 (void) inb(info->ioaddr + UART_RX);
991
992
993 if (info->board->chip_flag)
994 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
995
996 spin_unlock_irqrestore(&info->slock, flags);
997}
998
999/*
1000 * This routine is called whenever a serial port is opened. It
1001 * enables interrupts for a serial port, linking in its async structure into
1002 * the IRQ chain. It also performs the serial-specific
1003 * initialization for the tty structure.
1004 */
1005static int mxser_open(struct tty_struct *tty, struct file *filp)
1006{
1007 struct mxser_port *info;
1008 int line;
1009
1010 line = tty->index;
1011 if (line == MXSER_PORTS)
1012 return 0;
1013 if (line < 0 || line > MXSER_PORTS)
1014 return -ENODEV;
1015 info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
1016 if (!info->ioaddr)
1017 return -ENODEV;
1018
1019 tty->driver_data = info;
1020 return tty_port_open(&info->port, tty, filp);
1021}
1022
1023static void mxser_flush_buffer(struct tty_struct *tty)
1024{
1025 struct mxser_port *info = tty->driver_data;
1026 char fcr;
1027 unsigned long flags;
1028
1029
1030 spin_lock_irqsave(&info->slock, flags);
1031 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1032
1033 fcr = inb(info->ioaddr + UART_FCR);
1034 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1035 info->ioaddr + UART_FCR);
1036 outb(fcr, info->ioaddr + UART_FCR);
1037
1038 spin_unlock_irqrestore(&info->slock, flags);
1039
1040 tty_wakeup(tty);
1041}
1042
1043
1044static void mxser_close_port(struct tty_port *port)
1045{
1046 struct mxser_port *info = container_of(port, struct mxser_port, port);
1047 unsigned long timeout;
1048 /*
1049 * At this point we stop accepting input. To do this, we
1050 * disable the receive line status interrupts, and tell the
1051 * interrupt driver to stop checking the data ready bit in the
1052 * line status register.
1053 */
1054 info->IER &= ~UART_IER_RLSI;
1055 if (info->board->chip_flag)
1056 info->IER &= ~MOXA_MUST_RECV_ISR;
1057
1058 outb(info->IER, info->ioaddr + UART_IER);
1059 /*
1060 * Before we drop DTR, make sure the UART transmitter
1061 * has completely drained; this is especially
1062 * important if there is a transmit FIFO!
1063 */
1064 timeout = jiffies + HZ;
1065 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1066 schedule_timeout_interruptible(5);
1067 if (time_after(jiffies, timeout))
1068 break;
1069 }
1070}
1071
1072/*
1073 * This routine is called when the serial port gets closed. First, we
1074 * wait for the last remaining data to be sent. Then, we unlink its
1075 * async structure from the interrupt chain if necessary, and we free
1076 * that IRQ if nothing is left in the chain.
1077 */
1078static void mxser_close(struct tty_struct *tty, struct file *filp)
1079{
1080 struct mxser_port *info = tty->driver_data;
1081 struct tty_port *port = &info->port;
1082
1083 if (tty->index == MXSER_PORTS || info == NULL)
1084 return;
1085 if (tty_port_close_start(port, tty, filp) == 0)
1086 return;
1087 mutex_lock(&port->mutex);
1088 mxser_close_port(port);
1089 mxser_flush_buffer(tty);
1090 mxser_shutdown_port(port);
1091 clear_bit(ASYNCB_INITIALIZED, &port->flags);
1092 mutex_unlock(&port->mutex);
1093 /* Right now the tty_port set is done outside of the close_end helper
1094 as we don't yet have everyone using refcounts */
1095 tty_port_close_end(port, tty);
1096 tty_port_tty_set(port, NULL);
1097}
1098
1099static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1100{
1101 int c, total = 0;
1102 struct mxser_port *info = tty->driver_data;
1103 unsigned long flags;
1104
1105 if (!info->port.xmit_buf)
1106 return 0;
1107
1108 while (1) {
1109 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1110 SERIAL_XMIT_SIZE - info->xmit_head));
1111 if (c <= 0)
1112 break;
1113
1114 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
1115 spin_lock_irqsave(&info->slock, flags);
1116 info->xmit_head = (info->xmit_head + c) &
1117 (SERIAL_XMIT_SIZE - 1);
1118 info->xmit_cnt += c;
1119 spin_unlock_irqrestore(&info->slock, flags);
1120
1121 buf += c;
1122 count -= c;
1123 total += c;
1124 }
1125
1126 if (info->xmit_cnt && !tty->stopped) {
1127 if (!tty->hw_stopped ||
1128 (info->type == PORT_16550A) ||
1129 (info->board->chip_flag)) {
1130 spin_lock_irqsave(&info->slock, flags);
1131 outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1132 UART_IER);
1133 info->IER |= UART_IER_THRI;
1134 outb(info->IER, info->ioaddr + UART_IER);
1135 spin_unlock_irqrestore(&info->slock, flags);
1136 }
1137 }
1138 return total;
1139}
1140
1141static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
1142{
1143 struct mxser_port *info = tty->driver_data;
1144 unsigned long flags;
1145
1146 if (!info->port.xmit_buf)
1147 return 0;
1148
1149 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1150 return 0;
1151
1152 spin_lock_irqsave(&info->slock, flags);
1153 info->port.xmit_buf[info->xmit_head++] = ch;
1154 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1155 info->xmit_cnt++;
1156 spin_unlock_irqrestore(&info->slock, flags);
1157 if (!tty->stopped) {
1158 if (!tty->hw_stopped ||
1159 (info->type == PORT_16550A) ||
1160 info->board->chip_flag) {
1161 spin_lock_irqsave(&info->slock, flags);
1162 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1163 info->IER |= UART_IER_THRI;
1164 outb(info->IER, info->ioaddr + UART_IER);
1165 spin_unlock_irqrestore(&info->slock, flags);
1166 }
1167 }
1168 return 1;
1169}
1170
1171
1172static void mxser_flush_chars(struct tty_struct *tty)
1173{
1174 struct mxser_port *info = tty->driver_data;
1175 unsigned long flags;
1176
1177 if (info->xmit_cnt <= 0 || tty->stopped || !info->port.xmit_buf ||
1178 (tty->hw_stopped && info->type != PORT_16550A &&
1179 !info->board->chip_flag))
1180 return;
1181
1182 spin_lock_irqsave(&info->slock, flags);
1183
1184 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1185 info->IER |= UART_IER_THRI;
1186 outb(info->IER, info->ioaddr + UART_IER);
1187
1188 spin_unlock_irqrestore(&info->slock, flags);
1189}
1190
1191static int mxser_write_room(struct tty_struct *tty)
1192{
1193 struct mxser_port *info = tty->driver_data;
1194 int ret;
1195
1196 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1197 return ret < 0 ? 0 : ret;
1198}
1199
1200static int mxser_chars_in_buffer(struct tty_struct *tty)
1201{
1202 struct mxser_port *info = tty->driver_data;
1203 return info->xmit_cnt;
1204}
1205
1206/*
1207 * ------------------------------------------------------------
1208 * friends of mxser_ioctl()
1209 * ------------------------------------------------------------
1210 */
1211static int mxser_get_serial_info(struct tty_struct *tty,
1212 struct serial_struct __user *retinfo)
1213{
1214 struct mxser_port *info = tty->driver_data;
1215 struct serial_struct tmp = {
1216 .type = info->type,
1217 .line = tty->index,
1218 .port = info->ioaddr,
1219 .irq = info->board->irq,
1220 .flags = info->port.flags,
1221 .baud_base = info->baud_base,
1222 .close_delay = info->port.close_delay,
1223 .closing_wait = info->port.closing_wait,
1224 .custom_divisor = info->custom_divisor,
1225 .hub6 = 0
1226 };
1227 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1228 return -EFAULT;
1229 return 0;
1230}
1231
1232static int mxser_set_serial_info(struct tty_struct *tty,
1233 struct serial_struct __user *new_info)
1234{
1235 struct mxser_port *info = tty->driver_data;
1236 struct tty_port *port = &info->port;
1237 struct serial_struct new_serial;
1238 speed_t baud;
1239 unsigned long sl_flags;
1240 unsigned int flags;
1241 int retval = 0;
1242
1243 if (!new_info || !info->ioaddr)
1244 return -ENODEV;
1245 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1246 return -EFAULT;
1247
1248 if (new_serial.irq != info->board->irq ||
1249 new_serial.port != info->ioaddr)
1250 return -EINVAL;
1251
1252 flags = port->flags & ASYNC_SPD_MASK;
1253
1254 if (!capable(CAP_SYS_ADMIN)) {
1255 if ((new_serial.baud_base != info->baud_base) ||
1256 (new_serial.close_delay != info->port.close_delay) ||
1257 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK)))
1258 return -EPERM;
1259 info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
1260 (new_serial.flags & ASYNC_USR_MASK));
1261 } else {
1262 /*
1263 * OK, past this point, all the error checking has been done.
1264 * At this point, we start making changes.....
1265 */
1266 port->flags = ((port->flags & ~ASYNC_FLAGS) |
1267 (new_serial.flags & ASYNC_FLAGS));
1268 port->close_delay = new_serial.close_delay * HZ / 100;
1269 port->closing_wait = new_serial.closing_wait * HZ / 100;
1270 tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1271 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
1272 (new_serial.baud_base != info->baud_base ||
1273 new_serial.custom_divisor !=
1274 info->custom_divisor)) {
1275 if (new_serial.custom_divisor == 0)
1276 return -EINVAL;
1277 baud = new_serial.baud_base / new_serial.custom_divisor;
1278 tty_encode_baud_rate(tty, baud, baud);
1279 }
1280 }
1281
1282 info->type = new_serial.type;
1283
1284 process_txrx_fifo(info);
1285
1286 if (test_bit(ASYNCB_INITIALIZED, &port->flags)) {
1287 if (flags != (port->flags & ASYNC_SPD_MASK)) {
1288 spin_lock_irqsave(&info->slock, sl_flags);
1289 mxser_change_speed(tty, NULL);
1290 spin_unlock_irqrestore(&info->slock, sl_flags);
1291 }
1292 } else {
1293 retval = mxser_activate(port, tty);
1294 if (retval == 0)
1295 set_bit(ASYNCB_INITIALIZED, &port->flags);
1296 }
1297 return retval;
1298}
1299
1300/*
1301 * mxser_get_lsr_info - get line status register info
1302 *
1303 * Purpose: Let user call ioctl() to get info when the UART physically
1304 * is emptied. On bus types like RS485, the transmitter must
1305 * release the bus after transmitting. This must be done when
1306 * the transmit shift register is empty, not be done when the
1307 * transmit holding register is empty. This functionality
1308 * allows an RS485 driver to be written in user space.
1309 */
1310static int mxser_get_lsr_info(struct mxser_port *info,
1311 unsigned int __user *value)
1312{
1313 unsigned char status;
1314 unsigned int result;
1315 unsigned long flags;
1316
1317 spin_lock_irqsave(&info->slock, flags);
1318 status = inb(info->ioaddr + UART_LSR);
1319 spin_unlock_irqrestore(&info->slock, flags);
1320 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1321 return put_user(result, value);
1322}
1323
1324static int mxser_tiocmget(struct tty_struct *tty)
1325{
1326 struct mxser_port *info = tty->driver_data;
1327 unsigned char control, status;
1328 unsigned long flags;
1329
1330
1331 if (tty->index == MXSER_PORTS)
1332 return -ENOIOCTLCMD;
1333 if (test_bit(TTY_IO_ERROR, &tty->flags))
1334 return -EIO;
1335
1336 control = info->MCR;
1337
1338 spin_lock_irqsave(&info->slock, flags);
1339 status = inb(info->ioaddr + UART_MSR);
1340 if (status & UART_MSR_ANY_DELTA)
1341 mxser_check_modem_status(tty, info, status);
1342 spin_unlock_irqrestore(&info->slock, flags);
1343 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1344 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1345 ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1346 ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1347 ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1348 ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1349}
1350
1351static int mxser_tiocmset(struct tty_struct *tty,
1352 unsigned int set, unsigned int clear)
1353{
1354 struct mxser_port *info = tty->driver_data;
1355 unsigned long flags;
1356
1357
1358 if (tty->index == MXSER_PORTS)
1359 return -ENOIOCTLCMD;
1360 if (test_bit(TTY_IO_ERROR, &tty->flags))
1361 return -EIO;
1362
1363 spin_lock_irqsave(&info->slock, flags);
1364
1365 if (set & TIOCM_RTS)
1366 info->MCR |= UART_MCR_RTS;
1367 if (set & TIOCM_DTR)
1368 info->MCR |= UART_MCR_DTR;
1369
1370 if (clear & TIOCM_RTS)
1371 info->MCR &= ~UART_MCR_RTS;
1372 if (clear & TIOCM_DTR)
1373 info->MCR &= ~UART_MCR_DTR;
1374
1375 outb(info->MCR, info->ioaddr + UART_MCR);
1376 spin_unlock_irqrestore(&info->slock, flags);
1377 return 0;
1378}
1379
1380static int __init mxser_program_mode(int port)
1381{
1382 int id, i, j, n;
1383
1384 outb(0, port);
1385 outb(0, port);
1386 outb(0, port);
1387 (void)inb(port);
1388 (void)inb(port);
1389 outb(0, port);
1390 (void)inb(port);
1391
1392 id = inb(port + 1) & 0x1F;
1393 if ((id != C168_ASIC_ID) &&
1394 (id != C104_ASIC_ID) &&
1395 (id != C102_ASIC_ID) &&
1396 (id != CI132_ASIC_ID) &&
1397 (id != CI134_ASIC_ID) &&
1398 (id != CI104J_ASIC_ID))
1399 return -1;
1400 for (i = 0, j = 0; i < 4; i++) {
1401 n = inb(port + 2);
1402 if (n == 'M') {
1403 j = 1;
1404 } else if ((j == 1) && (n == 1)) {
1405 j = 2;
1406 break;
1407 } else
1408 j = 0;
1409 }
1410 if (j != 2)
1411 id = -2;
1412 return id;
1413}
1414
1415static void __init mxser_normal_mode(int port)
1416{
1417 int i, n;
1418
1419 outb(0xA5, port + 1);
1420 outb(0x80, port + 3);
1421 outb(12, port + 0); /* 9600 bps */
1422 outb(0, port + 1);
1423 outb(0x03, port + 3); /* 8 data bits */
1424 outb(0x13, port + 4); /* loop back mode */
1425 for (i = 0; i < 16; i++) {
1426 n = inb(port + 5);
1427 if ((n & 0x61) == 0x60)
1428 break;
1429 if ((n & 1) == 1)
1430 (void)inb(port);
1431 }
1432 outb(0x00, port + 4);
1433}
1434
1435#define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1436#define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1437#define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1438#define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1439#define EN_CCMD 0x000 /* Chip's command register */
1440#define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1441#define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1442#define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1443#define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1444#define EN0_DCFG 0x00E /* Data configuration reg WR */
1445#define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1446#define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1447#define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
1448static int __init mxser_read_register(int port, unsigned short *regs)
1449{
1450 int i, k, value, id;
1451 unsigned int j;
1452
1453 id = mxser_program_mode(port);
1454 if (id < 0)
1455 return id;
1456 for (i = 0; i < 14; i++) {
1457 k = (i & 0x3F) | 0x180;
1458 for (j = 0x100; j > 0; j >>= 1) {
1459 outb(CHIP_CS, port);
1460 if (k & j) {
1461 outb(CHIP_CS | CHIP_DO, port);
1462 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
1463 } else {
1464 outb(CHIP_CS, port);
1465 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
1466 }
1467 }
1468 (void)inb(port);
1469 value = 0;
1470 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1471 outb(CHIP_CS, port);
1472 outb(CHIP_CS | CHIP_SK, port);
1473 if (inb(port) & CHIP_DI)
1474 value |= j;
1475 }
1476 regs[i] = value;
1477 outb(0, port);
1478 }
1479 mxser_normal_mode(port);
1480 return id;
1481}
1482
1483static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1484{
1485 struct mxser_port *ip;
1486 struct tty_port *port;
1487 struct tty_struct *tty;
1488 int result, status;
1489 unsigned int i, j;
1490 int ret = 0;
1491
1492 switch (cmd) {
1493 case MOXA_GET_MAJOR:
1494 printk_ratelimited(KERN_WARNING "mxser: '%s' uses deprecated ioctl "
1495 "%x (GET_MAJOR), fix your userspace\n",
1496 current->comm, cmd);
1497 return put_user(ttymajor, (int __user *)argp);
1498
1499 case MOXA_CHKPORTENABLE:
1500 result = 0;
1501 for (i = 0; i < MXSER_BOARDS; i++)
1502 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1503 if (mxser_boards[i].ports[j].ioaddr)
1504 result |= (1 << i);
1505 return put_user(result, (unsigned long __user *)argp);
1506 case MOXA_GETDATACOUNT:
1507 /* The receive side is locked by port->slock but it isn't
1508 clear that an exact snapshot is worth copying here */
1509 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1510 ret = -EFAULT;
1511 return ret;
1512 case MOXA_GETMSTATUS: {
1513 struct mxser_mstatus ms, __user *msu = argp;
1514 for (i = 0; i < MXSER_BOARDS; i++)
1515 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1516 ip = &mxser_boards[i].ports[j];
1517 port = &ip->port;
1518 memset(&ms, 0, sizeof(ms));
1519
1520 mutex_lock(&port->mutex);
1521 if (!ip->ioaddr)
1522 goto copy;
1523
1524 tty = tty_port_tty_get(port);
1525
1526 if (!tty || !tty->termios)
1527 ms.cflag = ip->normal_termios.c_cflag;
1528 else
1529 ms.cflag = tty->termios->c_cflag;
1530 tty_kref_put(tty);
1531 spin_lock_irq(&ip->slock);
1532 status = inb(ip->ioaddr + UART_MSR);
1533 spin_unlock_irq(&ip->slock);
1534 if (status & UART_MSR_DCD)
1535 ms.dcd = 1;
1536 if (status & UART_MSR_DSR)
1537 ms.dsr = 1;
1538 if (status & UART_MSR_CTS)
1539 ms.cts = 1;
1540 copy:
1541 mutex_unlock(&port->mutex);
1542 if (copy_to_user(msu, &ms, sizeof(ms)))
1543 return -EFAULT;
1544 msu++;
1545 }
1546 return 0;
1547 }
1548 case MOXA_ASPP_MON_EXT: {
1549 struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */
1550 unsigned int cflag, iflag, p;
1551 u8 opmode;
1552
1553 me = kzalloc(sizeof(*me), GFP_KERNEL);
1554 if (!me)
1555 return -ENOMEM;
1556
1557 for (i = 0, p = 0; i < MXSER_BOARDS; i++) {
1558 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) {
1559 if (p >= ARRAY_SIZE(me->rx_cnt)) {
1560 i = MXSER_BOARDS;
1561 break;
1562 }
1563 ip = &mxser_boards[i].ports[j];
1564 port = &ip->port;
1565
1566 mutex_lock(&port->mutex);
1567 if (!ip->ioaddr) {
1568 mutex_unlock(&port->mutex);
1569 continue;
1570 }
1571
1572 spin_lock_irq(&ip->slock);
1573 status = mxser_get_msr(ip->ioaddr, 0, p);
1574
1575 if (status & UART_MSR_TERI)
1576 ip->icount.rng++;
1577 if (status & UART_MSR_DDSR)
1578 ip->icount.dsr++;
1579 if (status & UART_MSR_DDCD)
1580 ip->icount.dcd++;
1581 if (status & UART_MSR_DCTS)
1582 ip->icount.cts++;
1583
1584 ip->mon_data.modem_status = status;
1585 me->rx_cnt[p] = ip->mon_data.rxcnt;
1586 me->tx_cnt[p] = ip->mon_data.txcnt;
1587 me->up_rxcnt[p] = ip->mon_data.up_rxcnt;
1588 me->up_txcnt[p] = ip->mon_data.up_txcnt;
1589 me->modem_status[p] =
1590 ip->mon_data.modem_status;
1591 spin_unlock_irq(&ip->slock);
1592
1593 tty = tty_port_tty_get(&ip->port);
1594
1595 if (!tty || !tty->termios) {
1596 cflag = ip->normal_termios.c_cflag;
1597 iflag = ip->normal_termios.c_iflag;
1598 me->baudrate[p] = tty_termios_baud_rate(&ip->normal_termios);
1599 } else {
1600 cflag = tty->termios->c_cflag;
1601 iflag = tty->termios->c_iflag;
1602 me->baudrate[p] = tty_get_baud_rate(tty);
1603 }
1604 tty_kref_put(tty);
1605
1606 me->databits[p] = cflag & CSIZE;
1607 me->stopbits[p] = cflag & CSTOPB;
1608 me->parity[p] = cflag & (PARENB | PARODD |
1609 CMSPAR);
1610
1611 if (cflag & CRTSCTS)
1612 me->flowctrl[p] |= 0x03;
1613
1614 if (iflag & (IXON | IXOFF))
1615 me->flowctrl[p] |= 0x0C;
1616
1617 if (ip->type == PORT_16550A)
1618 me->fifo[p] = 1;
1619
1620 opmode = inb(ip->opmode_ioaddr)>>((p % 4) * 2);
1621 opmode &= OP_MODE_MASK;
1622 me->iftype[p] = opmode;
1623 mutex_unlock(&port->mutex);
1624 }
1625 }
1626 if (copy_to_user(argp, me, sizeof(*me)))
1627 ret = -EFAULT;
1628 kfree(me);
1629 return ret;
1630 }
1631 default:
1632 return -ENOIOCTLCMD;
1633 }
1634 return 0;
1635}
1636
1637static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
1638 struct async_icount *cprev)
1639{
1640 struct async_icount cnow;
1641 unsigned long flags;
1642 int ret;
1643
1644 spin_lock_irqsave(&info->slock, flags);
1645 cnow = info->icount; /* atomic copy */
1646 spin_unlock_irqrestore(&info->slock, flags);
1647
1648 ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1649 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1650 ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
1651 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
1652
1653 *cprev = cnow;
1654
1655 return ret;
1656}
1657
1658static int mxser_ioctl(struct tty_struct *tty,
1659 unsigned int cmd, unsigned long arg)
1660{
1661 struct mxser_port *info = tty->driver_data;
1662 struct tty_port *port = &info->port;
1663 struct async_icount cnow;
1664 unsigned long flags;
1665 void __user *argp = (void __user *)arg;
1666 int retval;
1667
1668 if (tty->index == MXSER_PORTS)
1669 return mxser_ioctl_special(cmd, argp);
1670
1671 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1672 int p;
1673 unsigned long opmode;
1674 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1675 int shiftbit;
1676 unsigned char val, mask;
1677
1678 p = tty->index % 4;
1679 if (cmd == MOXA_SET_OP_MODE) {
1680 if (get_user(opmode, (int __user *) argp))
1681 return -EFAULT;
1682 if (opmode != RS232_MODE &&
1683 opmode != RS485_2WIRE_MODE &&
1684 opmode != RS422_MODE &&
1685 opmode != RS485_4WIRE_MODE)
1686 return -EFAULT;
1687 mask = ModeMask[p];
1688 shiftbit = p * 2;
1689 spin_lock_irq(&info->slock);
1690 val = inb(info->opmode_ioaddr);
1691 val &= mask;
1692 val |= (opmode << shiftbit);
1693 outb(val, info->opmode_ioaddr);
1694 spin_unlock_irq(&info->slock);
1695 } else {
1696 shiftbit = p * 2;
1697 spin_lock_irq(&info->slock);
1698 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1699 spin_unlock_irq(&info->slock);
1700 opmode &= OP_MODE_MASK;
1701 if (put_user(opmode, (int __user *)argp))
1702 return -EFAULT;
1703 }
1704 return 0;
1705 }
1706
1707 if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT &&
1708 test_bit(TTY_IO_ERROR, &tty->flags))
1709 return -EIO;
1710
1711 switch (cmd) {
1712 case TIOCGSERIAL:
1713 mutex_lock(&port->mutex);
1714 retval = mxser_get_serial_info(tty, argp);
1715 mutex_unlock(&port->mutex);
1716 return retval;
1717 case TIOCSSERIAL:
1718 mutex_lock(&port->mutex);
1719 retval = mxser_set_serial_info(tty, argp);
1720 mutex_unlock(&port->mutex);
1721 return retval;
1722 case TIOCSERGETLSR: /* Get line status register */
1723 return mxser_get_lsr_info(info, argp);
1724 /*
1725 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1726 * - mask passed in arg for lines of interest
1727 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1728 * Caller should use TIOCGICOUNT to see which one it was
1729 */
1730 case TIOCMIWAIT:
1731 spin_lock_irqsave(&info->slock, flags);
1732 cnow = info->icount; /* note the counters on entry */
1733 spin_unlock_irqrestore(&info->slock, flags);
1734
1735 return wait_event_interruptible(info->port.delta_msr_wait,
1736 mxser_cflags_changed(info, arg, &cnow));
1737 case MOXA_HighSpeedOn:
1738 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1739 case MOXA_SDS_RSTICOUNTER:
1740 spin_lock_irq(&info->slock);
1741 info->mon_data.rxcnt = 0;
1742 info->mon_data.txcnt = 0;
1743 spin_unlock_irq(&info->slock);
1744 return 0;
1745
1746 case MOXA_ASPP_OQUEUE:{
1747 int len, lsr;
1748
1749 len = mxser_chars_in_buffer(tty);
1750 spin_lock_irq(&info->slock);
1751 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_THRE;
1752 spin_unlock_irq(&info->slock);
1753 len += (lsr ? 0 : 1);
1754
1755 return put_user(len, (int __user *)argp);
1756 }
1757 case MOXA_ASPP_MON: {
1758 int mcr, status;
1759
1760 spin_lock_irq(&info->slock);
1761 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1762 mxser_check_modem_status(tty, info, status);
1763
1764 mcr = inb(info->ioaddr + UART_MCR);
1765 spin_unlock_irq(&info->slock);
1766
1767 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1768 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1769 else
1770 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1771
1772 if (mcr & MOXA_MUST_MCR_TX_XON)
1773 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1774 else
1775 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1776
1777 if (tty->hw_stopped)
1778 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1779 else
1780 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1781
1782 if (copy_to_user(argp, &info->mon_data,
1783 sizeof(struct mxser_mon)))
1784 return -EFAULT;
1785
1786 return 0;
1787 }
1788 case MOXA_ASPP_LSTATUS: {
1789 if (put_user(info->err_shadow, (unsigned char __user *)argp))
1790 return -EFAULT;
1791
1792 info->err_shadow = 0;
1793 return 0;
1794 }
1795 case MOXA_SET_BAUD_METHOD: {
1796 int method;
1797
1798 if (get_user(method, (int __user *)argp))
1799 return -EFAULT;
1800 mxser_set_baud_method[tty->index] = method;
1801 return put_user(method, (int __user *)argp);
1802 }
1803 default:
1804 return -ENOIOCTLCMD;
1805 }
1806 return 0;
1807}
1808
1809 /*
1810 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1811 * Return: write counters to the user passed counter struct
1812 * NB: both 1->0 and 0->1 transitions are counted except for
1813 * RI where only 0->1 is counted.
1814 */
1815
1816static int mxser_get_icount(struct tty_struct *tty,
1817 struct serial_icounter_struct *icount)
1818
1819{
1820 struct mxser_port *info = tty->driver_data;
1821 struct async_icount cnow;
1822 unsigned long flags;
1823
1824 spin_lock_irqsave(&info->slock, flags);
1825 cnow = info->icount;
1826 spin_unlock_irqrestore(&info->slock, flags);
1827
1828 icount->frame = cnow.frame;
1829 icount->brk = cnow.brk;
1830 icount->overrun = cnow.overrun;
1831 icount->buf_overrun = cnow.buf_overrun;
1832 icount->parity = cnow.parity;
1833 icount->rx = cnow.rx;
1834 icount->tx = cnow.tx;
1835 icount->cts = cnow.cts;
1836 icount->dsr = cnow.dsr;
1837 icount->rng = cnow.rng;
1838 icount->dcd = cnow.dcd;
1839 return 0;
1840}
1841
1842static void mxser_stoprx(struct tty_struct *tty)
1843{
1844 struct mxser_port *info = tty->driver_data;
1845
1846 info->ldisc_stop_rx = 1;
1847 if (I_IXOFF(tty)) {
1848 if (info->board->chip_flag) {
1849 info->IER &= ~MOXA_MUST_RECV_ISR;
1850 outb(info->IER, info->ioaddr + UART_IER);
1851 } else {
1852 info->x_char = STOP_CHAR(tty);
1853 outb(0, info->ioaddr + UART_IER);
1854 info->IER |= UART_IER_THRI;
1855 outb(info->IER, info->ioaddr + UART_IER);
1856 }
1857 }
1858
1859 if (tty->termios->c_cflag & CRTSCTS) {
1860 info->MCR &= ~UART_MCR_RTS;
1861 outb(info->MCR, info->ioaddr + UART_MCR);
1862 }
1863}
1864
1865/*
1866 * This routine is called by the upper-layer tty layer to signal that
1867 * incoming characters should be throttled.
1868 */
1869static void mxser_throttle(struct tty_struct *tty)
1870{
1871 mxser_stoprx(tty);
1872}
1873
1874static void mxser_unthrottle(struct tty_struct *tty)
1875{
1876 struct mxser_port *info = tty->driver_data;
1877
1878 /* startrx */
1879 info->ldisc_stop_rx = 0;
1880 if (I_IXOFF(tty)) {
1881 if (info->x_char)
1882 info->x_char = 0;
1883 else {
1884 if (info->board->chip_flag) {
1885 info->IER |= MOXA_MUST_RECV_ISR;
1886 outb(info->IER, info->ioaddr + UART_IER);
1887 } else {
1888 info->x_char = START_CHAR(tty);
1889 outb(0, info->ioaddr + UART_IER);
1890 info->IER |= UART_IER_THRI;
1891 outb(info->IER, info->ioaddr + UART_IER);
1892 }
1893 }
1894 }
1895
1896 if (tty->termios->c_cflag & CRTSCTS) {
1897 info->MCR |= UART_MCR_RTS;
1898 outb(info->MCR, info->ioaddr + UART_MCR);
1899 }
1900}
1901
1902/*
1903 * mxser_stop() and mxser_start()
1904 *
1905 * This routines are called before setting or resetting tty->stopped.
1906 * They enable or disable transmitter interrupts, as necessary.
1907 */
1908static void mxser_stop(struct tty_struct *tty)
1909{
1910 struct mxser_port *info = tty->driver_data;
1911 unsigned long flags;
1912
1913 spin_lock_irqsave(&info->slock, flags);
1914 if (info->IER & UART_IER_THRI) {
1915 info->IER &= ~UART_IER_THRI;
1916 outb(info->IER, info->ioaddr + UART_IER);
1917 }
1918 spin_unlock_irqrestore(&info->slock, flags);
1919}
1920
1921static void mxser_start(struct tty_struct *tty)
1922{
1923 struct mxser_port *info = tty->driver_data;
1924 unsigned long flags;
1925
1926 spin_lock_irqsave(&info->slock, flags);
1927 if (info->xmit_cnt && info->port.xmit_buf) {
1928 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1929 info->IER |= UART_IER_THRI;
1930 outb(info->IER, info->ioaddr + UART_IER);
1931 }
1932 spin_unlock_irqrestore(&info->slock, flags);
1933}
1934
1935static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1936{
1937 struct mxser_port *info = tty->driver_data;
1938 unsigned long flags;
1939
1940 spin_lock_irqsave(&info->slock, flags);
1941 mxser_change_speed(tty, old_termios);
1942 spin_unlock_irqrestore(&info->slock, flags);
1943
1944 if ((old_termios->c_cflag & CRTSCTS) &&
1945 !(tty->termios->c_cflag & CRTSCTS)) {
1946 tty->hw_stopped = 0;
1947 mxser_start(tty);
1948 }
1949
1950 /* Handle sw stopped */
1951 if ((old_termios->c_iflag & IXON) &&
1952 !(tty->termios->c_iflag & IXON)) {
1953 tty->stopped = 0;
1954
1955 if (info->board->chip_flag) {
1956 spin_lock_irqsave(&info->slock, flags);
1957 mxser_disable_must_rx_software_flow_control(
1958 info->ioaddr);
1959 spin_unlock_irqrestore(&info->slock, flags);
1960 }
1961
1962 mxser_start(tty);
1963 }
1964}
1965
1966/*
1967 * mxser_wait_until_sent() --- wait until the transmitter is empty
1968 */
1969static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1970{
1971 struct mxser_port *info = tty->driver_data;
1972 unsigned long orig_jiffies, char_time;
1973 unsigned long flags;
1974 int lsr;
1975
1976 if (info->type == PORT_UNKNOWN)
1977 return;
1978
1979 if (info->xmit_fifo_size == 0)
1980 return; /* Just in case.... */
1981
1982 orig_jiffies = jiffies;
1983 /*
1984 * Set the check interval to be 1/5 of the estimated time to
1985 * send a single character, and make it at least 1. The check
1986 * interval should also be less than the timeout.
1987 *
1988 * Note: we have to use pretty tight timings here to satisfy
1989 * the NIST-PCTS.
1990 */
1991 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1992 char_time = char_time / 5;
1993 if (char_time == 0)
1994 char_time = 1;
1995 if (timeout && timeout < char_time)
1996 char_time = timeout;
1997 /*
1998 * If the transmitter hasn't cleared in twice the approximate
1999 * amount of time to send the entire FIFO, it probably won't
2000 * ever clear. This assumes the UART isn't doing flow
2001 * control, which is currently the case. Hence, if it ever
2002 * takes longer than info->timeout, this is probably due to a
2003 * UART bug of some kind. So, we clamp the timeout parameter at
2004 * 2*info->timeout.
2005 */
2006 if (!timeout || timeout > 2 * info->timeout)
2007 timeout = 2 * info->timeout;
2008#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2009 printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
2010 timeout, char_time);
2011 printk("jiff=%lu...", jiffies);
2012#endif
2013 spin_lock_irqsave(&info->slock, flags);
2014 while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
2015#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2016 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
2017#endif
2018 spin_unlock_irqrestore(&info->slock, flags);
2019 schedule_timeout_interruptible(char_time);
2020 spin_lock_irqsave(&info->slock, flags);
2021 if (signal_pending(current))
2022 break;
2023 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2024 break;
2025 }
2026 spin_unlock_irqrestore(&info->slock, flags);
2027 set_current_state(TASK_RUNNING);
2028
2029#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2030 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
2031#endif
2032}
2033
2034/*
2035 * This routine is called by tty_hangup() when a hangup is signaled.
2036 */
2037static void mxser_hangup(struct tty_struct *tty)
2038{
2039 struct mxser_port *info = tty->driver_data;
2040
2041 mxser_flush_buffer(tty);
2042 tty_port_hangup(&info->port);
2043}
2044
2045/*
2046 * mxser_rs_break() --- routine which turns the break handling on or off
2047 */
2048static int mxser_rs_break(struct tty_struct *tty, int break_state)
2049{
2050 struct mxser_port *info = tty->driver_data;
2051 unsigned long flags;
2052
2053 spin_lock_irqsave(&info->slock, flags);
2054 if (break_state == -1)
2055 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2056 info->ioaddr + UART_LCR);
2057 else
2058 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2059 info->ioaddr + UART_LCR);
2060 spin_unlock_irqrestore(&info->slock, flags);
2061 return 0;
2062}
2063
2064static void mxser_receive_chars(struct tty_struct *tty,
2065 struct mxser_port *port, int *status)
2066{
2067 unsigned char ch, gdl;
2068 int ignored = 0;
2069 int cnt = 0;
2070 int recv_room;
2071 int max = 256;
2072
2073 recv_room = tty->receive_room;
2074 if (recv_room == 0 && !port->ldisc_stop_rx)
2075 mxser_stoprx(tty);
2076 if (port->board->chip_flag != MOXA_OTHER_UART) {
2077
2078 if (*status & UART_LSR_SPECIAL)
2079 goto intr_old;
2080 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2081 (*status & MOXA_MUST_LSR_RERR))
2082 goto intr_old;
2083 if (*status & MOXA_MUST_LSR_RERR)
2084 goto intr_old;
2085
2086 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2087
2088 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2089 gdl &= MOXA_MUST_GDL_MASK;
2090 if (gdl >= recv_room) {
2091 if (!port->ldisc_stop_rx)
2092 mxser_stoprx(tty);
2093 }
2094 while (gdl--) {
2095 ch = inb(port->ioaddr + UART_RX);
2096 tty_insert_flip_char(tty, ch, 0);
2097 cnt++;
2098 }
2099 goto end_intr;
2100 }
2101intr_old:
2102
2103 do {
2104 if (max-- < 0)
2105 break;
2106
2107 ch = inb(port->ioaddr + UART_RX);
2108 if (port->board->chip_flag && (*status & UART_LSR_OE))
2109 outb(0x23, port->ioaddr + UART_FCR);
2110 *status &= port->read_status_mask;
2111 if (*status & port->ignore_status_mask) {
2112 if (++ignored > 100)
2113 break;
2114 } else {
2115 char flag = 0;
2116 if (*status & UART_LSR_SPECIAL) {
2117 if (*status & UART_LSR_BI) {
2118 flag = TTY_BREAK;
2119 port->icount.brk++;
2120
2121 if (port->port.flags & ASYNC_SAK)
2122 do_SAK(tty);
2123 } else if (*status & UART_LSR_PE) {
2124 flag = TTY_PARITY;
2125 port->icount.parity++;
2126 } else if (*status & UART_LSR_FE) {
2127 flag = TTY_FRAME;
2128 port->icount.frame++;
2129 } else if (*status & UART_LSR_OE) {
2130 flag = TTY_OVERRUN;
2131 port->icount.overrun++;
2132 } else
2133 flag = TTY_BREAK;
2134 }
2135 tty_insert_flip_char(tty, ch, flag);
2136 cnt++;
2137 if (cnt >= recv_room) {
2138 if (!port->ldisc_stop_rx)
2139 mxser_stoprx(tty);
2140 break;
2141 }
2142
2143 }
2144
2145 if (port->board->chip_flag)
2146 break;
2147
2148 *status = inb(port->ioaddr + UART_LSR);
2149 } while (*status & UART_LSR_DR);
2150
2151end_intr:
2152 mxvar_log.rxcnt[tty->index] += cnt;
2153 port->mon_data.rxcnt += cnt;
2154 port->mon_data.up_rxcnt += cnt;
2155
2156 /*
2157 * We are called from an interrupt context with &port->slock
2158 * being held. Drop it temporarily in order to prevent
2159 * recursive locking.
2160 */
2161 spin_unlock(&port->slock);
2162 tty_flip_buffer_push(tty);
2163 spin_lock(&port->slock);
2164}
2165
2166static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port)
2167{
2168 int count, cnt;
2169
2170 if (port->x_char) {
2171 outb(port->x_char, port->ioaddr + UART_TX);
2172 port->x_char = 0;
2173 mxvar_log.txcnt[tty->index]++;
2174 port->mon_data.txcnt++;
2175 port->mon_data.up_txcnt++;
2176 port->icount.tx++;
2177 return;
2178 }
2179
2180 if (port->port.xmit_buf == NULL)
2181 return;
2182
2183 if (port->xmit_cnt <= 0 || tty->stopped ||
2184 (tty->hw_stopped &&
2185 (port->type != PORT_16550A) &&
2186 (!port->board->chip_flag))) {
2187 port->IER &= ~UART_IER_THRI;
2188 outb(port->IER, port->ioaddr + UART_IER);
2189 return;
2190 }
2191
2192 cnt = port->xmit_cnt;
2193 count = port->xmit_fifo_size;
2194 do {
2195 outb(port->port.xmit_buf[port->xmit_tail++],
2196 port->ioaddr + UART_TX);
2197 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2198 if (--port->xmit_cnt <= 0)
2199 break;
2200 } while (--count > 0);
2201 mxvar_log.txcnt[tty->index] += (cnt - port->xmit_cnt);
2202
2203 port->mon_data.txcnt += (cnt - port->xmit_cnt);
2204 port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2205 port->icount.tx += (cnt - port->xmit_cnt);
2206
2207 if (port->xmit_cnt < WAKEUP_CHARS)
2208 tty_wakeup(tty);
2209
2210 if (port->xmit_cnt <= 0) {
2211 port->IER &= ~UART_IER_THRI;
2212 outb(port->IER, port->ioaddr + UART_IER);
2213 }
2214}
2215
2216/*
2217 * This is the serial driver's generic interrupt routine
2218 */
2219static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2220{
2221 int status, iir, i;
2222 struct mxser_board *brd = NULL;
2223 struct mxser_port *port;
2224 int max, irqbits, bits, msr;
2225 unsigned int int_cnt, pass_counter = 0;
2226 int handled = IRQ_NONE;
2227 struct tty_struct *tty;
2228
2229 for (i = 0; i < MXSER_BOARDS; i++)
2230 if (dev_id == &mxser_boards[i]) {
2231 brd = dev_id;
2232 break;
2233 }
2234
2235 if (i == MXSER_BOARDS)
2236 goto irq_stop;
2237 if (brd == NULL)
2238 goto irq_stop;
2239 max = brd->info->nports;
2240 while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
2241 irqbits = inb(brd->vector) & brd->vector_mask;
2242 if (irqbits == brd->vector_mask)
2243 break;
2244
2245 handled = IRQ_HANDLED;
2246 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2247 if (irqbits == brd->vector_mask)
2248 break;
2249 if (bits & irqbits)
2250 continue;
2251 port = &brd->ports[i];
2252
2253 int_cnt = 0;
2254 spin_lock(&port->slock);
2255 do {
2256 iir = inb(port->ioaddr + UART_IIR);
2257 if (iir & UART_IIR_NO_INT)
2258 break;
2259 iir &= MOXA_MUST_IIR_MASK;
2260 tty = tty_port_tty_get(&port->port);
2261 if (!tty ||
2262 (port->port.flags & ASYNC_CLOSING) ||
2263 !(port->port.flags &
2264 ASYNC_INITIALIZED)) {
2265 status = inb(port->ioaddr + UART_LSR);
2266 outb(0x27, port->ioaddr + UART_FCR);
2267 inb(port->ioaddr + UART_MSR);
2268 tty_kref_put(tty);
2269 break;
2270 }
2271
2272 status = inb(port->ioaddr + UART_LSR);
2273
2274 if (status & UART_LSR_PE)
2275 port->err_shadow |= NPPI_NOTIFY_PARITY;
2276 if (status & UART_LSR_FE)
2277 port->err_shadow |= NPPI_NOTIFY_FRAMING;
2278 if (status & UART_LSR_OE)
2279 port->err_shadow |=
2280 NPPI_NOTIFY_HW_OVERRUN;
2281 if (status & UART_LSR_BI)
2282 port->err_shadow |= NPPI_NOTIFY_BREAK;
2283
2284 if (port->board->chip_flag) {
2285 if (iir == MOXA_MUST_IIR_GDA ||
2286 iir == MOXA_MUST_IIR_RDA ||
2287 iir == MOXA_MUST_IIR_RTO ||
2288 iir == MOXA_MUST_IIR_LSR)
2289 mxser_receive_chars(tty, port,
2290 &status);
2291
2292 } else {
2293 status &= port->read_status_mask;
2294 if (status & UART_LSR_DR)
2295 mxser_receive_chars(tty, port,
2296 &status);
2297 }
2298 msr = inb(port->ioaddr + UART_MSR);
2299 if (msr & UART_MSR_ANY_DELTA)
2300 mxser_check_modem_status(tty, port, msr);
2301
2302 if (port->board->chip_flag) {
2303 if (iir == 0x02 && (status &
2304 UART_LSR_THRE))
2305 mxser_transmit_chars(tty, port);
2306 } else {
2307 if (status & UART_LSR_THRE)
2308 mxser_transmit_chars(tty, port);
2309 }
2310 tty_kref_put(tty);
2311 } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2312 spin_unlock(&port->slock);
2313 }
2314 }
2315
2316irq_stop:
2317 return handled;
2318}
2319
2320static const struct tty_operations mxser_ops = {
2321 .open = mxser_open,
2322 .close = mxser_close,
2323 .write = mxser_write,
2324 .put_char = mxser_put_char,
2325 .flush_chars = mxser_flush_chars,
2326 .write_room = mxser_write_room,
2327 .chars_in_buffer = mxser_chars_in_buffer,
2328 .flush_buffer = mxser_flush_buffer,
2329 .ioctl = mxser_ioctl,
2330 .throttle = mxser_throttle,
2331 .unthrottle = mxser_unthrottle,
2332 .set_termios = mxser_set_termios,
2333 .stop = mxser_stop,
2334 .start = mxser_start,
2335 .hangup = mxser_hangup,
2336 .break_ctl = mxser_rs_break,
2337 .wait_until_sent = mxser_wait_until_sent,
2338 .tiocmget = mxser_tiocmget,
2339 .tiocmset = mxser_tiocmset,
2340 .get_icount = mxser_get_icount,
2341};
2342
2343struct tty_port_operations mxser_port_ops = {
2344 .carrier_raised = mxser_carrier_raised,
2345 .dtr_rts = mxser_dtr_rts,
2346 .activate = mxser_activate,
2347 .shutdown = mxser_shutdown_port,
2348};
2349
2350/*
2351 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2352 */
2353
2354static void mxser_release_ISA_res(struct mxser_board *brd)
2355{
2356 free_irq(brd->irq, brd);
2357 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2358 release_region(brd->vector, 1);
2359}
2360
2361static int __devinit mxser_initbrd(struct mxser_board *brd,
2362 struct pci_dev *pdev)
2363{
2364 struct mxser_port *info;
2365 unsigned int i;
2366 int retval;
2367
2368 printk(KERN_INFO "mxser: max. baud rate = %d bps\n",
2369 brd->ports[0].max_baud);
2370
2371 for (i = 0; i < brd->info->nports; i++) {
2372 info = &brd->ports[i];
2373 tty_port_init(&info->port);
2374 info->port.ops = &mxser_port_ops;
2375 info->board = brd;
2376 info->stop_rx = 0;
2377 info->ldisc_stop_rx = 0;
2378
2379 /* Enhance mode enabled here */
2380 if (brd->chip_flag != MOXA_OTHER_UART)
2381 mxser_enable_must_enchance_mode(info->ioaddr);
2382
2383 info->port.flags = ASYNC_SHARE_IRQ;
2384 info->type = brd->uart_type;
2385
2386 process_txrx_fifo(info);
2387
2388 info->custom_divisor = info->baud_base * 16;
2389 info->port.close_delay = 5 * HZ / 10;
2390 info->port.closing_wait = 30 * HZ;
2391 info->normal_termios = mxvar_sdriver->init_termios;
2392 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2393 info->err_shadow = 0;
2394 spin_lock_init(&info->slock);
2395
2396 /* before set INT ISR, disable all int */
2397 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2398 info->ioaddr + UART_IER);
2399 }
2400
2401 retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
2402 brd);
2403 if (retval)
2404 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2405 "conflict with another device.\n",
2406 brd->info->name, brd->irq);
2407
2408 return retval;
2409}
2410
2411static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2412{
2413 int id, i, bits;
2414 unsigned short regs[16], irq;
2415 unsigned char scratch, scratch2;
2416
2417 brd->chip_flag = MOXA_OTHER_UART;
2418
2419 id = mxser_read_register(cap, regs);
2420 switch (id) {
2421 case C168_ASIC_ID:
2422 brd->info = &mxser_cards[0];
2423 break;
2424 case C104_ASIC_ID:
2425 brd->info = &mxser_cards[1];
2426 break;
2427 case CI104J_ASIC_ID:
2428 brd->info = &mxser_cards[2];
2429 break;
2430 case C102_ASIC_ID:
2431 brd->info = &mxser_cards[5];
2432 break;
2433 case CI132_ASIC_ID:
2434 brd->info = &mxser_cards[6];
2435 break;
2436 case CI134_ASIC_ID:
2437 brd->info = &mxser_cards[7];
2438 break;
2439 default:
2440 return 0;
2441 }
2442
2443 irq = 0;
2444 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2445 Flag-hack checks if configuration should be read as 2-port here. */
2446 if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2447 irq = regs[9] & 0xF000;
2448 irq = irq | (irq >> 4);
2449 if (irq != (regs[9] & 0xFF00))
2450 goto err_irqconflict;
2451 } else if (brd->info->nports == 4) {
2452 irq = regs[9] & 0xF000;
2453 irq = irq | (irq >> 4);
2454 irq = irq | (irq >> 8);
2455 if (irq != regs[9])
2456 goto err_irqconflict;
2457 } else if (brd->info->nports == 8) {
2458 irq = regs[9] & 0xF000;
2459 irq = irq | (irq >> 4);
2460 irq = irq | (irq >> 8);
2461 if ((irq != regs[9]) || (irq != regs[10]))
2462 goto err_irqconflict;
2463 }
2464
2465 if (!irq) {
2466 printk(KERN_ERR "mxser: interrupt number unset\n");
2467 return -EIO;
2468 }
2469 brd->irq = ((int)(irq & 0xF000) >> 12);
2470 for (i = 0; i < 8; i++)
2471 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2472 if ((regs[12] & 0x80) == 0) {
2473 printk(KERN_ERR "mxser: invalid interrupt vector\n");
2474 return -EIO;
2475 }
2476 brd->vector = (int)regs[11]; /* interrupt vector */
2477 if (id == 1)
2478 brd->vector_mask = 0x00FF;
2479 else
2480 brd->vector_mask = 0x000F;
2481 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2482 if (regs[12] & bits) {
2483 brd->ports[i].baud_base = 921600;
2484 brd->ports[i].max_baud = 921600;
2485 } else {
2486 brd->ports[i].baud_base = 115200;
2487 brd->ports[i].max_baud = 115200;
2488 }
2489 }
2490 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2491 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2492 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
2493 outb(scratch2, cap + UART_LCR);
2494 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2495 scratch = inb(cap + UART_IIR);
2496
2497 if (scratch & 0xC0)
2498 brd->uart_type = PORT_16550A;
2499 else
2500 brd->uart_type = PORT_16450;
2501 if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2502 "mxser(IO)")) {
2503 printk(KERN_ERR "mxser: can't request ports I/O region: "
2504 "0x%.8lx-0x%.8lx\n",
2505 brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2506 8 * brd->info->nports - 1);
2507 return -EIO;
2508 }
2509 if (!request_region(brd->vector, 1, "mxser(vector)")) {
2510 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2511 printk(KERN_ERR "mxser: can't request interrupt vector region: "
2512 "0x%.8lx-0x%.8lx\n",
2513 brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2514 8 * brd->info->nports - 1);
2515 return -EIO;
2516 }
2517 return brd->info->nports;
2518
2519err_irqconflict:
2520 printk(KERN_ERR "mxser: invalid interrupt number\n");
2521 return -EIO;
2522}
2523
2524static int __devinit mxser_probe(struct pci_dev *pdev,
2525 const struct pci_device_id *ent)
2526{
2527#ifdef CONFIG_PCI
2528 struct mxser_board *brd;
2529 unsigned int i, j;
2530 unsigned long ioaddress;
2531 int retval = -EINVAL;
2532
2533 for (i = 0; i < MXSER_BOARDS; i++)
2534 if (mxser_boards[i].info == NULL)
2535 break;
2536
2537 if (i >= MXSER_BOARDS) {
2538 dev_err(&pdev->dev, "too many boards found (maximum %d), board "
2539 "not configured\n", MXSER_BOARDS);
2540 goto err;
2541 }
2542
2543 brd = &mxser_boards[i];
2544 brd->idx = i * MXSER_PORTS_PER_BOARD;
2545 dev_info(&pdev->dev, "found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2546 mxser_cards[ent->driver_data].name,
2547 pdev->bus->number, PCI_SLOT(pdev->devfn));
2548
2549 retval = pci_enable_device(pdev);
2550 if (retval) {
2551 dev_err(&pdev->dev, "PCI enable failed\n");
2552 goto err;
2553 }
2554
2555 /* io address */
2556 ioaddress = pci_resource_start(pdev, 2);
2557 retval = pci_request_region(pdev, 2, "mxser(IO)");
2558 if (retval)
2559 goto err_dis;
2560
2561 brd->info = &mxser_cards[ent->driver_data];
2562 for (i = 0; i < brd->info->nports; i++)
2563 brd->ports[i].ioaddr = ioaddress + 8 * i;
2564
2565 /* vector */
2566 ioaddress = pci_resource_start(pdev, 3);
2567 retval = pci_request_region(pdev, 3, "mxser(vector)");
2568 if (retval)
2569 goto err_zero;
2570 brd->vector = ioaddress;
2571
2572 /* irq */
2573 brd->irq = pdev->irq;
2574
2575 brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2576 brd->uart_type = PORT_16550A;
2577 brd->vector_mask = 0;
2578
2579 for (i = 0; i < brd->info->nports; i++) {
2580 for (j = 0; j < UART_INFO_NUM; j++) {
2581 if (Gpci_uart_info[j].type == brd->chip_flag) {
2582 brd->ports[i].max_baud =
2583 Gpci_uart_info[j].max_baud;
2584
2585 /* exception....CP-102 */
2586 if (brd->info->flags & MXSER_HIGHBAUD)
2587 brd->ports[i].max_baud = 921600;
2588 break;
2589 }
2590 }
2591 }
2592
2593 if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2594 for (i = 0; i < brd->info->nports; i++) {
2595 if (i < 4)
2596 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2597 else
2598 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2599 }
2600 outb(0, ioaddress + 4); /* default set to RS232 mode */
2601 outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
2602 }
2603
2604 for (i = 0; i < brd->info->nports; i++) {
2605 brd->vector_mask |= (1 << i);
2606 brd->ports[i].baud_base = 921600;
2607 }
2608
2609 /* mxser_initbrd will hook ISR. */
2610 retval = mxser_initbrd(brd, pdev);
2611 if (retval)
2612 goto err_rel3;
2613
2614 for (i = 0; i < brd->info->nports; i++)
2615 tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
2616
2617 pci_set_drvdata(pdev, brd);
2618
2619 return 0;
2620err_rel3:
2621 pci_release_region(pdev, 3);
2622err_zero:
2623 brd->info = NULL;
2624 pci_release_region(pdev, 2);
2625err_dis:
2626 pci_disable_device(pdev);
2627err:
2628 return retval;
2629#else
2630 return -ENODEV;
2631#endif
2632}
2633
2634static void __devexit mxser_remove(struct pci_dev *pdev)
2635{
2636#ifdef CONFIG_PCI
2637 struct mxser_board *brd = pci_get_drvdata(pdev);
2638 unsigned int i;
2639
2640 for (i = 0; i < brd->info->nports; i++)
2641 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2642
2643 free_irq(pdev->irq, brd);
2644 pci_release_region(pdev, 2);
2645 pci_release_region(pdev, 3);
2646 pci_disable_device(pdev);
2647 brd->info = NULL;
2648#endif
2649}
2650
2651static struct pci_driver mxser_driver = {
2652 .name = "mxser",
2653 .id_table = mxser_pcibrds,
2654 .probe = mxser_probe,
2655 .remove = __devexit_p(mxser_remove)
2656};
2657
2658static int __init mxser_module_init(void)
2659{
2660 struct mxser_board *brd;
2661 unsigned int b, i, m;
2662 int retval;
2663
2664 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2665 if (!mxvar_sdriver)
2666 return -ENOMEM;
2667
2668 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2669 MXSER_VERSION);
2670
2671 /* Initialize the tty_driver structure */
2672 mxvar_sdriver->owner = THIS_MODULE;
2673 mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
2674 mxvar_sdriver->name = "ttyMI";
2675 mxvar_sdriver->major = ttymajor;
2676 mxvar_sdriver->minor_start = 0;
2677 mxvar_sdriver->num = MXSER_PORTS + 1;
2678 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2679 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2680 mxvar_sdriver->init_termios = tty_std_termios;
2681 mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2682 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2683 tty_set_operations(mxvar_sdriver, &mxser_ops);
2684
2685 retval = tty_register_driver(mxvar_sdriver);
2686 if (retval) {
2687 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2688 "tty driver !\n");
2689 goto err_put;
2690 }
2691
2692 /* Start finding ISA boards here */
2693 for (m = 0, b = 0; b < MXSER_BOARDS; b++) {
2694 if (!ioaddr[b])
2695 continue;
2696
2697 brd = &mxser_boards[m];
2698 retval = mxser_get_ISA_conf(ioaddr[b], brd);
2699 if (retval <= 0) {
2700 brd->info = NULL;
2701 continue;
2702 }
2703
2704 printk(KERN_INFO "mxser: found MOXA %s board (CAP=0x%lx)\n",
2705 brd->info->name, ioaddr[b]);
2706
2707 /* mxser_initbrd will hook ISR. */
2708 if (mxser_initbrd(brd, NULL) < 0) {
2709 brd->info = NULL;
2710 continue;
2711 }
2712
2713 brd->idx = m * MXSER_PORTS_PER_BOARD;
2714 for (i = 0; i < brd->info->nports; i++)
2715 tty_register_device(mxvar_sdriver, brd->idx + i, NULL);
2716
2717 m++;
2718 }
2719
2720 retval = pci_register_driver(&mxser_driver);
2721 if (retval) {
2722 printk(KERN_ERR "mxser: can't register pci driver\n");
2723 if (!m) {
2724 retval = -ENODEV;
2725 goto err_unr;
2726 } /* else: we have some ISA cards under control */
2727 }
2728
2729 return 0;
2730err_unr:
2731 tty_unregister_driver(mxvar_sdriver);
2732err_put:
2733 put_tty_driver(mxvar_sdriver);
2734 return retval;
2735}
2736
2737static void __exit mxser_module_exit(void)
2738{
2739 unsigned int i, j;
2740
2741 pci_unregister_driver(&mxser_driver);
2742
2743 for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2744 if (mxser_boards[i].info != NULL)
2745 for (j = 0; j < mxser_boards[i].info->nports; j++)
2746 tty_unregister_device(mxvar_sdriver,
2747 mxser_boards[i].idx + j);
2748 tty_unregister_driver(mxvar_sdriver);
2749 put_tty_driver(mxvar_sdriver);
2750
2751 for (i = 0; i < MXSER_BOARDS; i++)
2752 if (mxser_boards[i].info != NULL)
2753 mxser_release_ISA_res(&mxser_boards[i]);
2754}
2755
2756module_init(mxser_module_init);
2757module_exit(mxser_module_exit);
1/*
2 * mxser.c -- MOXA Smartio/Industio family multiport serial driver.
3 *
4 * Copyright (C) 1999-2006 Moxa Technologies (support@moxa.com).
5 * Copyright (C) 2006-2008 Jiri Slaby <jirislaby@gmail.com>
6 *
7 * This code is loosely based on the 1.8 moxa driver which is based on
8 * Linux serial driver, written by Linus Torvalds, Theodore T'so and
9 * others.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
17 * <alan@lxorguk.ukuu.org.uk>. The original 1.8 code is available on
18 * www.moxa.com.
19 * - Fixed x86_64 cleanness
20 */
21
22#include <linux/module.h>
23#include <linux/errno.h>
24#include <linux/signal.h>
25#include <linux/sched.h>
26#include <linux/timer.h>
27#include <linux/interrupt.h>
28#include <linux/tty.h>
29#include <linux/tty_flip.h>
30#include <linux/serial.h>
31#include <linux/serial_reg.h>
32#include <linux/major.h>
33#include <linux/string.h>
34#include <linux/fcntl.h>
35#include <linux/ptrace.h>
36#include <linux/ioport.h>
37#include <linux/mm.h>
38#include <linux/delay.h>
39#include <linux/pci.h>
40#include <linux/bitops.h>
41#include <linux/slab.h>
42#include <linux/ratelimit.h>
43
44#include <asm/io.h>
45#include <asm/irq.h>
46#include <asm/uaccess.h>
47
48#include "mxser.h"
49
50#define MXSER_VERSION "2.0.5" /* 1.14 */
51#define MXSERMAJOR 174
52
53#define MXSER_BOARDS 4 /* Max. boards */
54#define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
55#define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
56#define MXSER_ISR_PASS_LIMIT 100
57
58/*CheckIsMoxaMust return value*/
59#define MOXA_OTHER_UART 0x00
60#define MOXA_MUST_MU150_HWID 0x01
61#define MOXA_MUST_MU860_HWID 0x02
62
63#define WAKEUP_CHARS 256
64
65#define UART_MCR_AFE 0x20
66#define UART_LSR_SPECIAL 0x1E
67
68#define PCI_DEVICE_ID_POS104UL 0x1044
69#define PCI_DEVICE_ID_CB108 0x1080
70#define PCI_DEVICE_ID_CP102UF 0x1023
71#define PCI_DEVICE_ID_CP112UL 0x1120
72#define PCI_DEVICE_ID_CB114 0x1142
73#define PCI_DEVICE_ID_CP114UL 0x1143
74#define PCI_DEVICE_ID_CB134I 0x1341
75#define PCI_DEVICE_ID_CP138U 0x1380
76
77
78#define C168_ASIC_ID 1
79#define C104_ASIC_ID 2
80#define C102_ASIC_ID 0xB
81#define CI132_ASIC_ID 4
82#define CI134_ASIC_ID 3
83#define CI104J_ASIC_ID 5
84
85#define MXSER_HIGHBAUD 1
86#define MXSER_HAS2 2
87
88/* This is only for PCI */
89static const struct {
90 int type;
91 int tx_fifo;
92 int rx_fifo;
93 int xmit_fifo_size;
94 int rx_high_water;
95 int rx_trigger;
96 int rx_low_water;
97 long max_baud;
98} Gpci_uart_info[] = {
99 {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
100 {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
101 {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
102};
103#define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info)
104
105struct mxser_cardinfo {
106 char *name;
107 unsigned int nports;
108 unsigned int flags;
109};
110
111static const struct mxser_cardinfo mxser_cards[] = {
112/* 0*/ { "C168 series", 8, },
113 { "C104 series", 4, },
114 { "CI-104J series", 4, },
115 { "C168H/PCI series", 8, },
116 { "C104H/PCI series", 4, },
117/* 5*/ { "C102 series", 4, MXSER_HAS2 }, /* C102-ISA */
118 { "CI-132 series", 4, MXSER_HAS2 },
119 { "CI-134 series", 4, },
120 { "CP-132 series", 2, },
121 { "CP-114 series", 4, },
122/*10*/ { "CT-114 series", 4, },
123 { "CP-102 series", 2, MXSER_HIGHBAUD },
124 { "CP-104U series", 4, },
125 { "CP-168U series", 8, },
126 { "CP-132U series", 2, },
127/*15*/ { "CP-134U series", 4, },
128 { "CP-104JU series", 4, },
129 { "Moxa UC7000 Serial", 8, }, /* RC7000 */
130 { "CP-118U series", 8, },
131 { "CP-102UL series", 2, },
132/*20*/ { "CP-102U series", 2, },
133 { "CP-118EL series", 8, },
134 { "CP-168EL series", 8, },
135 { "CP-104EL series", 4, },
136 { "CB-108 series", 8, },
137/*25*/ { "CB-114 series", 4, },
138 { "CB-134I series", 4, },
139 { "CP-138U series", 8, },
140 { "POS-104UL series", 4, },
141 { "CP-114UL series", 4, },
142/*30*/ { "CP-102UF series", 2, },
143 { "CP-112UL series", 2, },
144};
145
146/* driver_data correspond to the lines in the structure above
147 see also ISA probe function before you change something */
148static struct pci_device_id mxser_pcibrds[] = {
149 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168), .driver_data = 3 },
150 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104), .driver_data = 4 },
151 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132), .driver_data = 8 },
152 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114), .driver_data = 9 },
153 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114), .driver_data = 10 },
154 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102), .driver_data = 11 },
155 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 },
156 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 },
157 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 },
158 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 },
159 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 },
160 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 },
161 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 },
162 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 },
163 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 },
164 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 },
165 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 },
166 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 },
167 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108), .driver_data = 24 },
168 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114), .driver_data = 25 },
169 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I), .driver_data = 26 },
170 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U), .driver_data = 27 },
171 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL), .driver_data = 28 },
172 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL), .driver_data = 29 },
173 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP102UF), .driver_data = 30 },
174 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP112UL), .driver_data = 31 },
175 { }
176};
177MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
178
179static unsigned long ioaddr[MXSER_BOARDS];
180static int ttymajor = MXSERMAJOR;
181
182/* Variables for insmod */
183
184MODULE_AUTHOR("Casper Yang");
185MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
186module_param_array(ioaddr, ulong, NULL, 0);
187MODULE_PARM_DESC(ioaddr, "ISA io addresses to look for a moxa board");
188module_param(ttymajor, int, 0);
189MODULE_LICENSE("GPL");
190
191struct mxser_log {
192 int tick;
193 unsigned long rxcnt[MXSER_PORTS];
194 unsigned long txcnt[MXSER_PORTS];
195};
196
197struct mxser_mon {
198 unsigned long rxcnt;
199 unsigned long txcnt;
200 unsigned long up_rxcnt;
201 unsigned long up_txcnt;
202 int modem_status;
203 unsigned char hold_reason;
204};
205
206struct mxser_mon_ext {
207 unsigned long rx_cnt[32];
208 unsigned long tx_cnt[32];
209 unsigned long up_rxcnt[32];
210 unsigned long up_txcnt[32];
211 int modem_status[32];
212
213 long baudrate[32];
214 int databits[32];
215 int stopbits[32];
216 int parity[32];
217 int flowctrl[32];
218 int fifo[32];
219 int iftype[32];
220};
221
222struct mxser_board;
223
224struct mxser_port {
225 struct tty_port port;
226 struct mxser_board *board;
227
228 unsigned long ioaddr;
229 unsigned long opmode_ioaddr;
230 int max_baud;
231
232 int rx_high_water;
233 int rx_trigger; /* Rx fifo trigger level */
234 int rx_low_water;
235 int baud_base; /* max. speed */
236 int type; /* UART type */
237
238 int x_char; /* xon/xoff character */
239 int IER; /* Interrupt Enable Register */
240 int MCR; /* Modem control register */
241
242 unsigned char stop_rx;
243 unsigned char ldisc_stop_rx;
244
245 int custom_divisor;
246 unsigned char err_shadow;
247
248 struct async_icount icount; /* kernel counters for 4 input interrupts */
249 int timeout;
250
251 int read_status_mask;
252 int ignore_status_mask;
253 int xmit_fifo_size;
254 int xmit_head;
255 int xmit_tail;
256 int xmit_cnt;
257
258 struct ktermios normal_termios;
259
260 struct mxser_mon mon_data;
261
262 spinlock_t slock;
263};
264
265struct mxser_board {
266 unsigned int idx;
267 int irq;
268 const struct mxser_cardinfo *info;
269 unsigned long vector;
270 unsigned long vector_mask;
271
272 int chip_flag;
273 int uart_type;
274
275 struct mxser_port ports[MXSER_PORTS_PER_BOARD];
276};
277
278struct mxser_mstatus {
279 tcflag_t cflag;
280 int cts;
281 int dsr;
282 int ri;
283 int dcd;
284};
285
286static struct mxser_board mxser_boards[MXSER_BOARDS];
287static struct tty_driver *mxvar_sdriver;
288static struct mxser_log mxvar_log;
289static int mxser_set_baud_method[MXSER_PORTS + 1];
290
291static void mxser_enable_must_enchance_mode(unsigned long baseio)
292{
293 u8 oldlcr;
294 u8 efr;
295
296 oldlcr = inb(baseio + UART_LCR);
297 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
298
299 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
300 efr |= MOXA_MUST_EFR_EFRB_ENABLE;
301
302 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
303 outb(oldlcr, baseio + UART_LCR);
304}
305
306#ifdef CONFIG_PCI
307static void mxser_disable_must_enchance_mode(unsigned long baseio)
308{
309 u8 oldlcr;
310 u8 efr;
311
312 oldlcr = inb(baseio + UART_LCR);
313 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
314
315 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
316 efr &= ~MOXA_MUST_EFR_EFRB_ENABLE;
317
318 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
319 outb(oldlcr, baseio + UART_LCR);
320}
321#endif
322
323static void mxser_set_must_xon1_value(unsigned long baseio, u8 value)
324{
325 u8 oldlcr;
326 u8 efr;
327
328 oldlcr = inb(baseio + UART_LCR);
329 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
330
331 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
332 efr &= ~MOXA_MUST_EFR_BANK_MASK;
333 efr |= MOXA_MUST_EFR_BANK0;
334
335 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
336 outb(value, baseio + MOXA_MUST_XON1_REGISTER);
337 outb(oldlcr, baseio + UART_LCR);
338}
339
340static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value)
341{
342 u8 oldlcr;
343 u8 efr;
344
345 oldlcr = inb(baseio + UART_LCR);
346 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
347
348 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
349 efr &= ~MOXA_MUST_EFR_BANK_MASK;
350 efr |= MOXA_MUST_EFR_BANK0;
351
352 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
353 outb(value, baseio + MOXA_MUST_XOFF1_REGISTER);
354 outb(oldlcr, baseio + UART_LCR);
355}
356
357static void mxser_set_must_fifo_value(struct mxser_port *info)
358{
359 u8 oldlcr;
360 u8 efr;
361
362 oldlcr = inb(info->ioaddr + UART_LCR);
363 outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR);
364
365 efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER);
366 efr &= ~MOXA_MUST_EFR_BANK_MASK;
367 efr |= MOXA_MUST_EFR_BANK1;
368
369 outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER);
370 outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER);
371 outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER);
372 outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER);
373 outb(oldlcr, info->ioaddr + UART_LCR);
374}
375
376static void mxser_set_must_enum_value(unsigned long baseio, u8 value)
377{
378 u8 oldlcr;
379 u8 efr;
380
381 oldlcr = inb(baseio + UART_LCR);
382 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
383
384 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
385 efr &= ~MOXA_MUST_EFR_BANK_MASK;
386 efr |= MOXA_MUST_EFR_BANK2;
387
388 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
389 outb(value, baseio + MOXA_MUST_ENUM_REGISTER);
390 outb(oldlcr, baseio + UART_LCR);
391}
392
393#ifdef CONFIG_PCI
394static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId)
395{
396 u8 oldlcr;
397 u8 efr;
398
399 oldlcr = inb(baseio + UART_LCR);
400 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
401
402 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
403 efr &= ~MOXA_MUST_EFR_BANK_MASK;
404 efr |= MOXA_MUST_EFR_BANK2;
405
406 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
407 *pId = inb(baseio + MOXA_MUST_HWID_REGISTER);
408 outb(oldlcr, baseio + UART_LCR);
409}
410#endif
411
412static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio)
413{
414 u8 oldlcr;
415 u8 efr;
416
417 oldlcr = inb(baseio + UART_LCR);
418 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
419
420 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
421 efr &= ~MOXA_MUST_EFR_SF_MASK;
422
423 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
424 outb(oldlcr, baseio + UART_LCR);
425}
426
427static void mxser_enable_must_tx_software_flow_control(unsigned long baseio)
428{
429 u8 oldlcr;
430 u8 efr;
431
432 oldlcr = inb(baseio + UART_LCR);
433 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
434
435 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
436 efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
437 efr |= MOXA_MUST_EFR_SF_TX1;
438
439 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
440 outb(oldlcr, baseio + UART_LCR);
441}
442
443static void mxser_disable_must_tx_software_flow_control(unsigned long baseio)
444{
445 u8 oldlcr;
446 u8 efr;
447
448 oldlcr = inb(baseio + UART_LCR);
449 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
450
451 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
452 efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
453
454 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
455 outb(oldlcr, baseio + UART_LCR);
456}
457
458static void mxser_enable_must_rx_software_flow_control(unsigned long baseio)
459{
460 u8 oldlcr;
461 u8 efr;
462
463 oldlcr = inb(baseio + UART_LCR);
464 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
465
466 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
467 efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
468 efr |= MOXA_MUST_EFR_SF_RX1;
469
470 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
471 outb(oldlcr, baseio + UART_LCR);
472}
473
474static void mxser_disable_must_rx_software_flow_control(unsigned long baseio)
475{
476 u8 oldlcr;
477 u8 efr;
478
479 oldlcr = inb(baseio + UART_LCR);
480 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
481
482 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
483 efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
484
485 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
486 outb(oldlcr, baseio + UART_LCR);
487}
488
489#ifdef CONFIG_PCI
490static int __devinit CheckIsMoxaMust(unsigned long io)
491{
492 u8 oldmcr, hwid;
493 int i;
494
495 outb(0, io + UART_LCR);
496 mxser_disable_must_enchance_mode(io);
497 oldmcr = inb(io + UART_MCR);
498 outb(0, io + UART_MCR);
499 mxser_set_must_xon1_value(io, 0x11);
500 if ((hwid = inb(io + UART_MCR)) != 0) {
501 outb(oldmcr, io + UART_MCR);
502 return MOXA_OTHER_UART;
503 }
504
505 mxser_get_must_hardware_id(io, &hwid);
506 for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
507 if (hwid == Gpci_uart_info[i].type)
508 return (int)hwid;
509 }
510 return MOXA_OTHER_UART;
511}
512#endif
513
514static void process_txrx_fifo(struct mxser_port *info)
515{
516 int i;
517
518 if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
519 info->rx_trigger = 1;
520 info->rx_high_water = 1;
521 info->rx_low_water = 1;
522 info->xmit_fifo_size = 1;
523 } else
524 for (i = 0; i < UART_INFO_NUM; i++)
525 if (info->board->chip_flag == Gpci_uart_info[i].type) {
526 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
527 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
528 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
529 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
530 break;
531 }
532}
533
534static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
535{
536 static unsigned char mxser_msr[MXSER_PORTS + 1];
537 unsigned char status = 0;
538
539 status = inb(baseaddr + UART_MSR);
540
541 mxser_msr[port] &= 0x0F;
542 mxser_msr[port] |= status;
543 status = mxser_msr[port];
544 if (mode)
545 mxser_msr[port] = 0;
546
547 return status;
548}
549
550static int mxser_carrier_raised(struct tty_port *port)
551{
552 struct mxser_port *mp = container_of(port, struct mxser_port, port);
553 return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0;
554}
555
556static void mxser_dtr_rts(struct tty_port *port, int on)
557{
558 struct mxser_port *mp = container_of(port, struct mxser_port, port);
559 unsigned long flags;
560
561 spin_lock_irqsave(&mp->slock, flags);
562 if (on)
563 outb(inb(mp->ioaddr + UART_MCR) |
564 UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR);
565 else
566 outb(inb(mp->ioaddr + UART_MCR)&~(UART_MCR_DTR | UART_MCR_RTS),
567 mp->ioaddr + UART_MCR);
568 spin_unlock_irqrestore(&mp->slock, flags);
569}
570
571static int mxser_set_baud(struct tty_struct *tty, long newspd)
572{
573 struct mxser_port *info = tty->driver_data;
574 int quot = 0, baud;
575 unsigned char cval;
576
577 if (!info->ioaddr)
578 return -1;
579
580 if (newspd > info->max_baud)
581 return -1;
582
583 if (newspd == 134) {
584 quot = 2 * info->baud_base / 269;
585 tty_encode_baud_rate(tty, 134, 134);
586 } else if (newspd) {
587 quot = info->baud_base / newspd;
588 if (quot == 0)
589 quot = 1;
590 baud = info->baud_base/quot;
591 tty_encode_baud_rate(tty, baud, baud);
592 } else {
593 quot = 0;
594 }
595
596 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
597 info->timeout += HZ / 50; /* Add .02 seconds of slop */
598
599 if (quot) {
600 info->MCR |= UART_MCR_DTR;
601 outb(info->MCR, info->ioaddr + UART_MCR);
602 } else {
603 info->MCR &= ~UART_MCR_DTR;
604 outb(info->MCR, info->ioaddr + UART_MCR);
605 return 0;
606 }
607
608 cval = inb(info->ioaddr + UART_LCR);
609
610 outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
611
612 outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
613 outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
614 outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
615
616#ifdef BOTHER
617 if (C_BAUD(tty) == BOTHER) {
618 quot = info->baud_base % newspd;
619 quot *= 8;
620 if (quot % newspd > newspd / 2) {
621 quot /= newspd;
622 quot++;
623 } else
624 quot /= newspd;
625
626 mxser_set_must_enum_value(info->ioaddr, quot);
627 } else
628#endif
629 mxser_set_must_enum_value(info->ioaddr, 0);
630
631 return 0;
632}
633
634/*
635 * This routine is called to set the UART divisor registers to match
636 * the specified baud rate for a serial port.
637 */
638static int mxser_change_speed(struct tty_struct *tty,
639 struct ktermios *old_termios)
640{
641 struct mxser_port *info = tty->driver_data;
642 unsigned cflag, cval, fcr;
643 int ret = 0;
644 unsigned char status;
645
646 cflag = tty->termios->c_cflag;
647 if (!info->ioaddr)
648 return ret;
649
650 if (mxser_set_baud_method[tty->index] == 0)
651 mxser_set_baud(tty, tty_get_baud_rate(tty));
652
653 /* byte size and parity */
654 switch (cflag & CSIZE) {
655 case CS5:
656 cval = 0x00;
657 break;
658 case CS6:
659 cval = 0x01;
660 break;
661 case CS7:
662 cval = 0x02;
663 break;
664 case CS8:
665 cval = 0x03;
666 break;
667 default:
668 cval = 0x00;
669 break; /* too keep GCC shut... */
670 }
671 if (cflag & CSTOPB)
672 cval |= 0x04;
673 if (cflag & PARENB)
674 cval |= UART_LCR_PARITY;
675 if (!(cflag & PARODD))
676 cval |= UART_LCR_EPAR;
677 if (cflag & CMSPAR)
678 cval |= UART_LCR_SPAR;
679
680 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
681 if (info->board->chip_flag) {
682 fcr = UART_FCR_ENABLE_FIFO;
683 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
684 mxser_set_must_fifo_value(info);
685 } else
686 fcr = 0;
687 } else {
688 fcr = UART_FCR_ENABLE_FIFO;
689 if (info->board->chip_flag) {
690 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
691 mxser_set_must_fifo_value(info);
692 } else {
693 switch (info->rx_trigger) {
694 case 1:
695 fcr |= UART_FCR_TRIGGER_1;
696 break;
697 case 4:
698 fcr |= UART_FCR_TRIGGER_4;
699 break;
700 case 8:
701 fcr |= UART_FCR_TRIGGER_8;
702 break;
703 default:
704 fcr |= UART_FCR_TRIGGER_14;
705 break;
706 }
707 }
708 }
709
710 /* CTS flow control flag and modem status interrupts */
711 info->IER &= ~UART_IER_MSI;
712 info->MCR &= ~UART_MCR_AFE;
713 if (cflag & CRTSCTS) {
714 info->port.flags |= ASYNC_CTS_FLOW;
715 info->IER |= UART_IER_MSI;
716 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
717 info->MCR |= UART_MCR_AFE;
718 } else {
719 status = inb(info->ioaddr + UART_MSR);
720 if (tty->hw_stopped) {
721 if (status & UART_MSR_CTS) {
722 tty->hw_stopped = 0;
723 if (info->type != PORT_16550A &&
724 !info->board->chip_flag) {
725 outb(info->IER & ~UART_IER_THRI,
726 info->ioaddr +
727 UART_IER);
728 info->IER |= UART_IER_THRI;
729 outb(info->IER, info->ioaddr +
730 UART_IER);
731 }
732 tty_wakeup(tty);
733 }
734 } else {
735 if (!(status & UART_MSR_CTS)) {
736 tty->hw_stopped = 1;
737 if ((info->type != PORT_16550A) &&
738 (!info->board->chip_flag)) {
739 info->IER &= ~UART_IER_THRI;
740 outb(info->IER, info->ioaddr +
741 UART_IER);
742 }
743 }
744 }
745 }
746 } else {
747 info->port.flags &= ~ASYNC_CTS_FLOW;
748 }
749 outb(info->MCR, info->ioaddr + UART_MCR);
750 if (cflag & CLOCAL) {
751 info->port.flags &= ~ASYNC_CHECK_CD;
752 } else {
753 info->port.flags |= ASYNC_CHECK_CD;
754 info->IER |= UART_IER_MSI;
755 }
756 outb(info->IER, info->ioaddr + UART_IER);
757
758 /*
759 * Set up parity check flag
760 */
761 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
762 if (I_INPCK(tty))
763 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
764 if (I_BRKINT(tty) || I_PARMRK(tty))
765 info->read_status_mask |= UART_LSR_BI;
766
767 info->ignore_status_mask = 0;
768
769 if (I_IGNBRK(tty)) {
770 info->ignore_status_mask |= UART_LSR_BI;
771 info->read_status_mask |= UART_LSR_BI;
772 /*
773 * If we're ignore parity and break indicators, ignore
774 * overruns too. (For real raw support).
775 */
776 if (I_IGNPAR(tty)) {
777 info->ignore_status_mask |=
778 UART_LSR_OE |
779 UART_LSR_PE |
780 UART_LSR_FE;
781 info->read_status_mask |=
782 UART_LSR_OE |
783 UART_LSR_PE |
784 UART_LSR_FE;
785 }
786 }
787 if (info->board->chip_flag) {
788 mxser_set_must_xon1_value(info->ioaddr, START_CHAR(tty));
789 mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(tty));
790 if (I_IXON(tty)) {
791 mxser_enable_must_rx_software_flow_control(
792 info->ioaddr);
793 } else {
794 mxser_disable_must_rx_software_flow_control(
795 info->ioaddr);
796 }
797 if (I_IXOFF(tty)) {
798 mxser_enable_must_tx_software_flow_control(
799 info->ioaddr);
800 } else {
801 mxser_disable_must_tx_software_flow_control(
802 info->ioaddr);
803 }
804 }
805
806
807 outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
808 outb(cval, info->ioaddr + UART_LCR);
809
810 return ret;
811}
812
813static void mxser_check_modem_status(struct tty_struct *tty,
814 struct mxser_port *port, int status)
815{
816 /* update input line counters */
817 if (status & UART_MSR_TERI)
818 port->icount.rng++;
819 if (status & UART_MSR_DDSR)
820 port->icount.dsr++;
821 if (status & UART_MSR_DDCD)
822 port->icount.dcd++;
823 if (status & UART_MSR_DCTS)
824 port->icount.cts++;
825 port->mon_data.modem_status = status;
826 wake_up_interruptible(&port->port.delta_msr_wait);
827
828 if ((port->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
829 if (status & UART_MSR_DCD)
830 wake_up_interruptible(&port->port.open_wait);
831 }
832
833 if (port->port.flags & ASYNC_CTS_FLOW) {
834 if (tty->hw_stopped) {
835 if (status & UART_MSR_CTS) {
836 tty->hw_stopped = 0;
837
838 if ((port->type != PORT_16550A) &&
839 (!port->board->chip_flag)) {
840 outb(port->IER & ~UART_IER_THRI,
841 port->ioaddr + UART_IER);
842 port->IER |= UART_IER_THRI;
843 outb(port->IER, port->ioaddr +
844 UART_IER);
845 }
846 tty_wakeup(tty);
847 }
848 } else {
849 if (!(status & UART_MSR_CTS)) {
850 tty->hw_stopped = 1;
851 if (port->type != PORT_16550A &&
852 !port->board->chip_flag) {
853 port->IER &= ~UART_IER_THRI;
854 outb(port->IER, port->ioaddr +
855 UART_IER);
856 }
857 }
858 }
859 }
860}
861
862static int mxser_activate(struct tty_port *port, struct tty_struct *tty)
863{
864 struct mxser_port *info = container_of(port, struct mxser_port, port);
865 unsigned long page;
866 unsigned long flags;
867
868 page = __get_free_page(GFP_KERNEL);
869 if (!page)
870 return -ENOMEM;
871
872 spin_lock_irqsave(&info->slock, flags);
873
874 if (!info->ioaddr || !info->type) {
875 set_bit(TTY_IO_ERROR, &tty->flags);
876 free_page(page);
877 spin_unlock_irqrestore(&info->slock, flags);
878 return 0;
879 }
880 info->port.xmit_buf = (unsigned char *) page;
881
882 /*
883 * Clear the FIFO buffers and disable them
884 * (they will be reenabled in mxser_change_speed())
885 */
886 if (info->board->chip_flag)
887 outb((UART_FCR_CLEAR_RCVR |
888 UART_FCR_CLEAR_XMIT |
889 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
890 else
891 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
892 info->ioaddr + UART_FCR);
893
894 /*
895 * At this point there's no way the LSR could still be 0xFF;
896 * if it is, then bail out, because there's likely no UART
897 * here.
898 */
899 if (inb(info->ioaddr + UART_LSR) == 0xff) {
900 spin_unlock_irqrestore(&info->slock, flags);
901 if (capable(CAP_SYS_ADMIN)) {
902 set_bit(TTY_IO_ERROR, &tty->flags);
903 return 0;
904 } else
905 return -ENODEV;
906 }
907
908 /*
909 * Clear the interrupt registers.
910 */
911 (void) inb(info->ioaddr + UART_LSR);
912 (void) inb(info->ioaddr + UART_RX);
913 (void) inb(info->ioaddr + UART_IIR);
914 (void) inb(info->ioaddr + UART_MSR);
915
916 /*
917 * Now, initialize the UART
918 */
919 outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
920 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
921 outb(info->MCR, info->ioaddr + UART_MCR);
922
923 /*
924 * Finally, enable interrupts
925 */
926 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
927
928 if (info->board->chip_flag)
929 info->IER |= MOXA_MUST_IER_EGDAI;
930 outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
931
932 /*
933 * And clear the interrupt registers again for luck.
934 */
935 (void) inb(info->ioaddr + UART_LSR);
936 (void) inb(info->ioaddr + UART_RX);
937 (void) inb(info->ioaddr + UART_IIR);
938 (void) inb(info->ioaddr + UART_MSR);
939
940 clear_bit(TTY_IO_ERROR, &tty->flags);
941 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
942
943 /*
944 * and set the speed of the serial port
945 */
946 mxser_change_speed(tty, NULL);
947 spin_unlock_irqrestore(&info->slock, flags);
948
949 return 0;
950}
951
952/*
953 * This routine will shutdown a serial port
954 */
955static void mxser_shutdown_port(struct tty_port *port)
956{
957 struct mxser_port *info = container_of(port, struct mxser_port, port);
958 unsigned long flags;
959
960 spin_lock_irqsave(&info->slock, flags);
961
962 /*
963 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
964 * here so the queue might never be waken up
965 */
966 wake_up_interruptible(&info->port.delta_msr_wait);
967
968 /*
969 * Free the xmit buffer, if necessary
970 */
971 if (info->port.xmit_buf) {
972 free_page((unsigned long) info->port.xmit_buf);
973 info->port.xmit_buf = NULL;
974 }
975
976 info->IER = 0;
977 outb(0x00, info->ioaddr + UART_IER);
978
979 /* clear Rx/Tx FIFO's */
980 if (info->board->chip_flag)
981 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
982 MOXA_MUST_FCR_GDA_MODE_ENABLE,
983 info->ioaddr + UART_FCR);
984 else
985 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
986 info->ioaddr + UART_FCR);
987
988 /* read data port to reset things */
989 (void) inb(info->ioaddr + UART_RX);
990
991
992 if (info->board->chip_flag)
993 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
994
995 spin_unlock_irqrestore(&info->slock, flags);
996}
997
998/*
999 * This routine is called whenever a serial port is opened. It
1000 * enables interrupts for a serial port, linking in its async structure into
1001 * the IRQ chain. It also performs the serial-specific
1002 * initialization for the tty structure.
1003 */
1004static int mxser_open(struct tty_struct *tty, struct file *filp)
1005{
1006 struct mxser_port *info;
1007 int line;
1008
1009 line = tty->index;
1010 if (line == MXSER_PORTS)
1011 return 0;
1012 info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
1013 if (!info->ioaddr)
1014 return -ENODEV;
1015
1016 tty->driver_data = info;
1017 return tty_port_open(&info->port, tty, filp);
1018}
1019
1020static void mxser_flush_buffer(struct tty_struct *tty)
1021{
1022 struct mxser_port *info = tty->driver_data;
1023 char fcr;
1024 unsigned long flags;
1025
1026
1027 spin_lock_irqsave(&info->slock, flags);
1028 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1029
1030 fcr = inb(info->ioaddr + UART_FCR);
1031 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1032 info->ioaddr + UART_FCR);
1033 outb(fcr, info->ioaddr + UART_FCR);
1034
1035 spin_unlock_irqrestore(&info->slock, flags);
1036
1037 tty_wakeup(tty);
1038}
1039
1040
1041static void mxser_close_port(struct tty_port *port)
1042{
1043 struct mxser_port *info = container_of(port, struct mxser_port, port);
1044 unsigned long timeout;
1045 /*
1046 * At this point we stop accepting input. To do this, we
1047 * disable the receive line status interrupts, and tell the
1048 * interrupt driver to stop checking the data ready bit in the
1049 * line status register.
1050 */
1051 info->IER &= ~UART_IER_RLSI;
1052 if (info->board->chip_flag)
1053 info->IER &= ~MOXA_MUST_RECV_ISR;
1054
1055 outb(info->IER, info->ioaddr + UART_IER);
1056 /*
1057 * Before we drop DTR, make sure the UART transmitter
1058 * has completely drained; this is especially
1059 * important if there is a transmit FIFO!
1060 */
1061 timeout = jiffies + HZ;
1062 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1063 schedule_timeout_interruptible(5);
1064 if (time_after(jiffies, timeout))
1065 break;
1066 }
1067}
1068
1069/*
1070 * This routine is called when the serial port gets closed. First, we
1071 * wait for the last remaining data to be sent. Then, we unlink its
1072 * async structure from the interrupt chain if necessary, and we free
1073 * that IRQ if nothing is left in the chain.
1074 */
1075static void mxser_close(struct tty_struct *tty, struct file *filp)
1076{
1077 struct mxser_port *info = tty->driver_data;
1078 struct tty_port *port = &info->port;
1079
1080 if (tty->index == MXSER_PORTS || info == NULL)
1081 return;
1082 if (tty_port_close_start(port, tty, filp) == 0)
1083 return;
1084 mutex_lock(&port->mutex);
1085 mxser_close_port(port);
1086 mxser_flush_buffer(tty);
1087 mxser_shutdown_port(port);
1088 clear_bit(ASYNCB_INITIALIZED, &port->flags);
1089 mutex_unlock(&port->mutex);
1090 /* Right now the tty_port set is done outside of the close_end helper
1091 as we don't yet have everyone using refcounts */
1092 tty_port_close_end(port, tty);
1093 tty_port_tty_set(port, NULL);
1094}
1095
1096static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1097{
1098 int c, total = 0;
1099 struct mxser_port *info = tty->driver_data;
1100 unsigned long flags;
1101
1102 if (!info->port.xmit_buf)
1103 return 0;
1104
1105 while (1) {
1106 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1107 SERIAL_XMIT_SIZE - info->xmit_head));
1108 if (c <= 0)
1109 break;
1110
1111 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
1112 spin_lock_irqsave(&info->slock, flags);
1113 info->xmit_head = (info->xmit_head + c) &
1114 (SERIAL_XMIT_SIZE - 1);
1115 info->xmit_cnt += c;
1116 spin_unlock_irqrestore(&info->slock, flags);
1117
1118 buf += c;
1119 count -= c;
1120 total += c;
1121 }
1122
1123 if (info->xmit_cnt && !tty->stopped) {
1124 if (!tty->hw_stopped ||
1125 (info->type == PORT_16550A) ||
1126 (info->board->chip_flag)) {
1127 spin_lock_irqsave(&info->slock, flags);
1128 outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1129 UART_IER);
1130 info->IER |= UART_IER_THRI;
1131 outb(info->IER, info->ioaddr + UART_IER);
1132 spin_unlock_irqrestore(&info->slock, flags);
1133 }
1134 }
1135 return total;
1136}
1137
1138static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
1139{
1140 struct mxser_port *info = tty->driver_data;
1141 unsigned long flags;
1142
1143 if (!info->port.xmit_buf)
1144 return 0;
1145
1146 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1147 return 0;
1148
1149 spin_lock_irqsave(&info->slock, flags);
1150 info->port.xmit_buf[info->xmit_head++] = ch;
1151 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1152 info->xmit_cnt++;
1153 spin_unlock_irqrestore(&info->slock, flags);
1154 if (!tty->stopped) {
1155 if (!tty->hw_stopped ||
1156 (info->type == PORT_16550A) ||
1157 info->board->chip_flag) {
1158 spin_lock_irqsave(&info->slock, flags);
1159 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1160 info->IER |= UART_IER_THRI;
1161 outb(info->IER, info->ioaddr + UART_IER);
1162 spin_unlock_irqrestore(&info->slock, flags);
1163 }
1164 }
1165 return 1;
1166}
1167
1168
1169static void mxser_flush_chars(struct tty_struct *tty)
1170{
1171 struct mxser_port *info = tty->driver_data;
1172 unsigned long flags;
1173
1174 if (info->xmit_cnt <= 0 || tty->stopped || !info->port.xmit_buf ||
1175 (tty->hw_stopped && info->type != PORT_16550A &&
1176 !info->board->chip_flag))
1177 return;
1178
1179 spin_lock_irqsave(&info->slock, flags);
1180
1181 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1182 info->IER |= UART_IER_THRI;
1183 outb(info->IER, info->ioaddr + UART_IER);
1184
1185 spin_unlock_irqrestore(&info->slock, flags);
1186}
1187
1188static int mxser_write_room(struct tty_struct *tty)
1189{
1190 struct mxser_port *info = tty->driver_data;
1191 int ret;
1192
1193 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1194 return ret < 0 ? 0 : ret;
1195}
1196
1197static int mxser_chars_in_buffer(struct tty_struct *tty)
1198{
1199 struct mxser_port *info = tty->driver_data;
1200 return info->xmit_cnt;
1201}
1202
1203/*
1204 * ------------------------------------------------------------
1205 * friends of mxser_ioctl()
1206 * ------------------------------------------------------------
1207 */
1208static int mxser_get_serial_info(struct tty_struct *tty,
1209 struct serial_struct __user *retinfo)
1210{
1211 struct mxser_port *info = tty->driver_data;
1212 struct serial_struct tmp = {
1213 .type = info->type,
1214 .line = tty->index,
1215 .port = info->ioaddr,
1216 .irq = info->board->irq,
1217 .flags = info->port.flags,
1218 .baud_base = info->baud_base,
1219 .close_delay = info->port.close_delay,
1220 .closing_wait = info->port.closing_wait,
1221 .custom_divisor = info->custom_divisor,
1222 .hub6 = 0
1223 };
1224 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1225 return -EFAULT;
1226 return 0;
1227}
1228
1229static int mxser_set_serial_info(struct tty_struct *tty,
1230 struct serial_struct __user *new_info)
1231{
1232 struct mxser_port *info = tty->driver_data;
1233 struct tty_port *port = &info->port;
1234 struct serial_struct new_serial;
1235 speed_t baud;
1236 unsigned long sl_flags;
1237 unsigned int flags;
1238 int retval = 0;
1239
1240 if (!new_info || !info->ioaddr)
1241 return -ENODEV;
1242 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1243 return -EFAULT;
1244
1245 if (new_serial.irq != info->board->irq ||
1246 new_serial.port != info->ioaddr)
1247 return -EINVAL;
1248
1249 flags = port->flags & ASYNC_SPD_MASK;
1250
1251 if (!capable(CAP_SYS_ADMIN)) {
1252 if ((new_serial.baud_base != info->baud_base) ||
1253 (new_serial.close_delay != info->port.close_delay) ||
1254 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK)))
1255 return -EPERM;
1256 info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
1257 (new_serial.flags & ASYNC_USR_MASK));
1258 } else {
1259 /*
1260 * OK, past this point, all the error checking has been done.
1261 * At this point, we start making changes.....
1262 */
1263 port->flags = ((port->flags & ~ASYNC_FLAGS) |
1264 (new_serial.flags & ASYNC_FLAGS));
1265 port->close_delay = new_serial.close_delay * HZ / 100;
1266 port->closing_wait = new_serial.closing_wait * HZ / 100;
1267 tty->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1268 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
1269 (new_serial.baud_base != info->baud_base ||
1270 new_serial.custom_divisor !=
1271 info->custom_divisor)) {
1272 if (new_serial.custom_divisor == 0)
1273 return -EINVAL;
1274 baud = new_serial.baud_base / new_serial.custom_divisor;
1275 tty_encode_baud_rate(tty, baud, baud);
1276 }
1277 }
1278
1279 info->type = new_serial.type;
1280
1281 process_txrx_fifo(info);
1282
1283 if (test_bit(ASYNCB_INITIALIZED, &port->flags)) {
1284 if (flags != (port->flags & ASYNC_SPD_MASK)) {
1285 spin_lock_irqsave(&info->slock, sl_flags);
1286 mxser_change_speed(tty, NULL);
1287 spin_unlock_irqrestore(&info->slock, sl_flags);
1288 }
1289 } else {
1290 retval = mxser_activate(port, tty);
1291 if (retval == 0)
1292 set_bit(ASYNCB_INITIALIZED, &port->flags);
1293 }
1294 return retval;
1295}
1296
1297/*
1298 * mxser_get_lsr_info - get line status register info
1299 *
1300 * Purpose: Let user call ioctl() to get info when the UART physically
1301 * is emptied. On bus types like RS485, the transmitter must
1302 * release the bus after transmitting. This must be done when
1303 * the transmit shift register is empty, not be done when the
1304 * transmit holding register is empty. This functionality
1305 * allows an RS485 driver to be written in user space.
1306 */
1307static int mxser_get_lsr_info(struct mxser_port *info,
1308 unsigned int __user *value)
1309{
1310 unsigned char status;
1311 unsigned int result;
1312 unsigned long flags;
1313
1314 spin_lock_irqsave(&info->slock, flags);
1315 status = inb(info->ioaddr + UART_LSR);
1316 spin_unlock_irqrestore(&info->slock, flags);
1317 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1318 return put_user(result, value);
1319}
1320
1321static int mxser_tiocmget(struct tty_struct *tty)
1322{
1323 struct mxser_port *info = tty->driver_data;
1324 unsigned char control, status;
1325 unsigned long flags;
1326
1327
1328 if (tty->index == MXSER_PORTS)
1329 return -ENOIOCTLCMD;
1330 if (test_bit(TTY_IO_ERROR, &tty->flags))
1331 return -EIO;
1332
1333 control = info->MCR;
1334
1335 spin_lock_irqsave(&info->slock, flags);
1336 status = inb(info->ioaddr + UART_MSR);
1337 if (status & UART_MSR_ANY_DELTA)
1338 mxser_check_modem_status(tty, info, status);
1339 spin_unlock_irqrestore(&info->slock, flags);
1340 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1341 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1342 ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1343 ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1344 ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1345 ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1346}
1347
1348static int mxser_tiocmset(struct tty_struct *tty,
1349 unsigned int set, unsigned int clear)
1350{
1351 struct mxser_port *info = tty->driver_data;
1352 unsigned long flags;
1353
1354
1355 if (tty->index == MXSER_PORTS)
1356 return -ENOIOCTLCMD;
1357 if (test_bit(TTY_IO_ERROR, &tty->flags))
1358 return -EIO;
1359
1360 spin_lock_irqsave(&info->slock, flags);
1361
1362 if (set & TIOCM_RTS)
1363 info->MCR |= UART_MCR_RTS;
1364 if (set & TIOCM_DTR)
1365 info->MCR |= UART_MCR_DTR;
1366
1367 if (clear & TIOCM_RTS)
1368 info->MCR &= ~UART_MCR_RTS;
1369 if (clear & TIOCM_DTR)
1370 info->MCR &= ~UART_MCR_DTR;
1371
1372 outb(info->MCR, info->ioaddr + UART_MCR);
1373 spin_unlock_irqrestore(&info->slock, flags);
1374 return 0;
1375}
1376
1377static int __init mxser_program_mode(int port)
1378{
1379 int id, i, j, n;
1380
1381 outb(0, port);
1382 outb(0, port);
1383 outb(0, port);
1384 (void)inb(port);
1385 (void)inb(port);
1386 outb(0, port);
1387 (void)inb(port);
1388
1389 id = inb(port + 1) & 0x1F;
1390 if ((id != C168_ASIC_ID) &&
1391 (id != C104_ASIC_ID) &&
1392 (id != C102_ASIC_ID) &&
1393 (id != CI132_ASIC_ID) &&
1394 (id != CI134_ASIC_ID) &&
1395 (id != CI104J_ASIC_ID))
1396 return -1;
1397 for (i = 0, j = 0; i < 4; i++) {
1398 n = inb(port + 2);
1399 if (n == 'M') {
1400 j = 1;
1401 } else if ((j == 1) && (n == 1)) {
1402 j = 2;
1403 break;
1404 } else
1405 j = 0;
1406 }
1407 if (j != 2)
1408 id = -2;
1409 return id;
1410}
1411
1412static void __init mxser_normal_mode(int port)
1413{
1414 int i, n;
1415
1416 outb(0xA5, port + 1);
1417 outb(0x80, port + 3);
1418 outb(12, port + 0); /* 9600 bps */
1419 outb(0, port + 1);
1420 outb(0x03, port + 3); /* 8 data bits */
1421 outb(0x13, port + 4); /* loop back mode */
1422 for (i = 0; i < 16; i++) {
1423 n = inb(port + 5);
1424 if ((n & 0x61) == 0x60)
1425 break;
1426 if ((n & 1) == 1)
1427 (void)inb(port);
1428 }
1429 outb(0x00, port + 4);
1430}
1431
1432#define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1433#define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1434#define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1435#define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1436#define EN_CCMD 0x000 /* Chip's command register */
1437#define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1438#define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1439#define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1440#define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1441#define EN0_DCFG 0x00E /* Data configuration reg WR */
1442#define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1443#define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1444#define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
1445static int __init mxser_read_register(int port, unsigned short *regs)
1446{
1447 int i, k, value, id;
1448 unsigned int j;
1449
1450 id = mxser_program_mode(port);
1451 if (id < 0)
1452 return id;
1453 for (i = 0; i < 14; i++) {
1454 k = (i & 0x3F) | 0x180;
1455 for (j = 0x100; j > 0; j >>= 1) {
1456 outb(CHIP_CS, port);
1457 if (k & j) {
1458 outb(CHIP_CS | CHIP_DO, port);
1459 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
1460 } else {
1461 outb(CHIP_CS, port);
1462 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
1463 }
1464 }
1465 (void)inb(port);
1466 value = 0;
1467 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1468 outb(CHIP_CS, port);
1469 outb(CHIP_CS | CHIP_SK, port);
1470 if (inb(port) & CHIP_DI)
1471 value |= j;
1472 }
1473 regs[i] = value;
1474 outb(0, port);
1475 }
1476 mxser_normal_mode(port);
1477 return id;
1478}
1479
1480static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1481{
1482 struct mxser_port *ip;
1483 struct tty_port *port;
1484 struct tty_struct *tty;
1485 int result, status;
1486 unsigned int i, j;
1487 int ret = 0;
1488
1489 switch (cmd) {
1490 case MOXA_GET_MAJOR:
1491 printk_ratelimited(KERN_WARNING "mxser: '%s' uses deprecated ioctl "
1492 "%x (GET_MAJOR), fix your userspace\n",
1493 current->comm, cmd);
1494 return put_user(ttymajor, (int __user *)argp);
1495
1496 case MOXA_CHKPORTENABLE:
1497 result = 0;
1498 for (i = 0; i < MXSER_BOARDS; i++)
1499 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1500 if (mxser_boards[i].ports[j].ioaddr)
1501 result |= (1 << i);
1502 return put_user(result, (unsigned long __user *)argp);
1503 case MOXA_GETDATACOUNT:
1504 /* The receive side is locked by port->slock but it isn't
1505 clear that an exact snapshot is worth copying here */
1506 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1507 ret = -EFAULT;
1508 return ret;
1509 case MOXA_GETMSTATUS: {
1510 struct mxser_mstatus ms, __user *msu = argp;
1511 for (i = 0; i < MXSER_BOARDS; i++)
1512 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1513 ip = &mxser_boards[i].ports[j];
1514 port = &ip->port;
1515 memset(&ms, 0, sizeof(ms));
1516
1517 mutex_lock(&port->mutex);
1518 if (!ip->ioaddr)
1519 goto copy;
1520
1521 tty = tty_port_tty_get(port);
1522
1523 if (!tty || !tty->termios)
1524 ms.cflag = ip->normal_termios.c_cflag;
1525 else
1526 ms.cflag = tty->termios->c_cflag;
1527 tty_kref_put(tty);
1528 spin_lock_irq(&ip->slock);
1529 status = inb(ip->ioaddr + UART_MSR);
1530 spin_unlock_irq(&ip->slock);
1531 if (status & UART_MSR_DCD)
1532 ms.dcd = 1;
1533 if (status & UART_MSR_DSR)
1534 ms.dsr = 1;
1535 if (status & UART_MSR_CTS)
1536 ms.cts = 1;
1537 copy:
1538 mutex_unlock(&port->mutex);
1539 if (copy_to_user(msu, &ms, sizeof(ms)))
1540 return -EFAULT;
1541 msu++;
1542 }
1543 return 0;
1544 }
1545 case MOXA_ASPP_MON_EXT: {
1546 struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */
1547 unsigned int cflag, iflag, p;
1548 u8 opmode;
1549
1550 me = kzalloc(sizeof(*me), GFP_KERNEL);
1551 if (!me)
1552 return -ENOMEM;
1553
1554 for (i = 0, p = 0; i < MXSER_BOARDS; i++) {
1555 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) {
1556 if (p >= ARRAY_SIZE(me->rx_cnt)) {
1557 i = MXSER_BOARDS;
1558 break;
1559 }
1560 ip = &mxser_boards[i].ports[j];
1561 port = &ip->port;
1562
1563 mutex_lock(&port->mutex);
1564 if (!ip->ioaddr) {
1565 mutex_unlock(&port->mutex);
1566 continue;
1567 }
1568
1569 spin_lock_irq(&ip->slock);
1570 status = mxser_get_msr(ip->ioaddr, 0, p);
1571
1572 if (status & UART_MSR_TERI)
1573 ip->icount.rng++;
1574 if (status & UART_MSR_DDSR)
1575 ip->icount.dsr++;
1576 if (status & UART_MSR_DDCD)
1577 ip->icount.dcd++;
1578 if (status & UART_MSR_DCTS)
1579 ip->icount.cts++;
1580
1581 ip->mon_data.modem_status = status;
1582 me->rx_cnt[p] = ip->mon_data.rxcnt;
1583 me->tx_cnt[p] = ip->mon_data.txcnt;
1584 me->up_rxcnt[p] = ip->mon_data.up_rxcnt;
1585 me->up_txcnt[p] = ip->mon_data.up_txcnt;
1586 me->modem_status[p] =
1587 ip->mon_data.modem_status;
1588 spin_unlock_irq(&ip->slock);
1589
1590 tty = tty_port_tty_get(&ip->port);
1591
1592 if (!tty || !tty->termios) {
1593 cflag = ip->normal_termios.c_cflag;
1594 iflag = ip->normal_termios.c_iflag;
1595 me->baudrate[p] = tty_termios_baud_rate(&ip->normal_termios);
1596 } else {
1597 cflag = tty->termios->c_cflag;
1598 iflag = tty->termios->c_iflag;
1599 me->baudrate[p] = tty_get_baud_rate(tty);
1600 }
1601 tty_kref_put(tty);
1602
1603 me->databits[p] = cflag & CSIZE;
1604 me->stopbits[p] = cflag & CSTOPB;
1605 me->parity[p] = cflag & (PARENB | PARODD |
1606 CMSPAR);
1607
1608 if (cflag & CRTSCTS)
1609 me->flowctrl[p] |= 0x03;
1610
1611 if (iflag & (IXON | IXOFF))
1612 me->flowctrl[p] |= 0x0C;
1613
1614 if (ip->type == PORT_16550A)
1615 me->fifo[p] = 1;
1616
1617 opmode = inb(ip->opmode_ioaddr)>>((p % 4) * 2);
1618 opmode &= OP_MODE_MASK;
1619 me->iftype[p] = opmode;
1620 mutex_unlock(&port->mutex);
1621 }
1622 }
1623 if (copy_to_user(argp, me, sizeof(*me)))
1624 ret = -EFAULT;
1625 kfree(me);
1626 return ret;
1627 }
1628 default:
1629 return -ENOIOCTLCMD;
1630 }
1631 return 0;
1632}
1633
1634static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
1635 struct async_icount *cprev)
1636{
1637 struct async_icount cnow;
1638 unsigned long flags;
1639 int ret;
1640
1641 spin_lock_irqsave(&info->slock, flags);
1642 cnow = info->icount; /* atomic copy */
1643 spin_unlock_irqrestore(&info->slock, flags);
1644
1645 ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1646 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1647 ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
1648 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
1649
1650 *cprev = cnow;
1651
1652 return ret;
1653}
1654
1655static int mxser_ioctl(struct tty_struct *tty,
1656 unsigned int cmd, unsigned long arg)
1657{
1658 struct mxser_port *info = tty->driver_data;
1659 struct tty_port *port = &info->port;
1660 struct async_icount cnow;
1661 unsigned long flags;
1662 void __user *argp = (void __user *)arg;
1663 int retval;
1664
1665 if (tty->index == MXSER_PORTS)
1666 return mxser_ioctl_special(cmd, argp);
1667
1668 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1669 int p;
1670 unsigned long opmode;
1671 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1672 int shiftbit;
1673 unsigned char val, mask;
1674
1675 p = tty->index % 4;
1676 if (cmd == MOXA_SET_OP_MODE) {
1677 if (get_user(opmode, (int __user *) argp))
1678 return -EFAULT;
1679 if (opmode != RS232_MODE &&
1680 opmode != RS485_2WIRE_MODE &&
1681 opmode != RS422_MODE &&
1682 opmode != RS485_4WIRE_MODE)
1683 return -EFAULT;
1684 mask = ModeMask[p];
1685 shiftbit = p * 2;
1686 spin_lock_irq(&info->slock);
1687 val = inb(info->opmode_ioaddr);
1688 val &= mask;
1689 val |= (opmode << shiftbit);
1690 outb(val, info->opmode_ioaddr);
1691 spin_unlock_irq(&info->slock);
1692 } else {
1693 shiftbit = p * 2;
1694 spin_lock_irq(&info->slock);
1695 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1696 spin_unlock_irq(&info->slock);
1697 opmode &= OP_MODE_MASK;
1698 if (put_user(opmode, (int __user *)argp))
1699 return -EFAULT;
1700 }
1701 return 0;
1702 }
1703
1704 if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT &&
1705 test_bit(TTY_IO_ERROR, &tty->flags))
1706 return -EIO;
1707
1708 switch (cmd) {
1709 case TIOCGSERIAL:
1710 mutex_lock(&port->mutex);
1711 retval = mxser_get_serial_info(tty, argp);
1712 mutex_unlock(&port->mutex);
1713 return retval;
1714 case TIOCSSERIAL:
1715 mutex_lock(&port->mutex);
1716 retval = mxser_set_serial_info(tty, argp);
1717 mutex_unlock(&port->mutex);
1718 return retval;
1719 case TIOCSERGETLSR: /* Get line status register */
1720 return mxser_get_lsr_info(info, argp);
1721 /*
1722 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1723 * - mask passed in arg for lines of interest
1724 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1725 * Caller should use TIOCGICOUNT to see which one it was
1726 */
1727 case TIOCMIWAIT:
1728 spin_lock_irqsave(&info->slock, flags);
1729 cnow = info->icount; /* note the counters on entry */
1730 spin_unlock_irqrestore(&info->slock, flags);
1731
1732 return wait_event_interruptible(info->port.delta_msr_wait,
1733 mxser_cflags_changed(info, arg, &cnow));
1734 case MOXA_HighSpeedOn:
1735 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1736 case MOXA_SDS_RSTICOUNTER:
1737 spin_lock_irq(&info->slock);
1738 info->mon_data.rxcnt = 0;
1739 info->mon_data.txcnt = 0;
1740 spin_unlock_irq(&info->slock);
1741 return 0;
1742
1743 case MOXA_ASPP_OQUEUE:{
1744 int len, lsr;
1745
1746 len = mxser_chars_in_buffer(tty);
1747 spin_lock_irq(&info->slock);
1748 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_THRE;
1749 spin_unlock_irq(&info->slock);
1750 len += (lsr ? 0 : 1);
1751
1752 return put_user(len, (int __user *)argp);
1753 }
1754 case MOXA_ASPP_MON: {
1755 int mcr, status;
1756
1757 spin_lock_irq(&info->slock);
1758 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1759 mxser_check_modem_status(tty, info, status);
1760
1761 mcr = inb(info->ioaddr + UART_MCR);
1762 spin_unlock_irq(&info->slock);
1763
1764 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1765 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1766 else
1767 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1768
1769 if (mcr & MOXA_MUST_MCR_TX_XON)
1770 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1771 else
1772 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1773
1774 if (tty->hw_stopped)
1775 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1776 else
1777 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1778
1779 if (copy_to_user(argp, &info->mon_data,
1780 sizeof(struct mxser_mon)))
1781 return -EFAULT;
1782
1783 return 0;
1784 }
1785 case MOXA_ASPP_LSTATUS: {
1786 if (put_user(info->err_shadow, (unsigned char __user *)argp))
1787 return -EFAULT;
1788
1789 info->err_shadow = 0;
1790 return 0;
1791 }
1792 case MOXA_SET_BAUD_METHOD: {
1793 int method;
1794
1795 if (get_user(method, (int __user *)argp))
1796 return -EFAULT;
1797 mxser_set_baud_method[tty->index] = method;
1798 return put_user(method, (int __user *)argp);
1799 }
1800 default:
1801 return -ENOIOCTLCMD;
1802 }
1803 return 0;
1804}
1805
1806 /*
1807 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1808 * Return: write counters to the user passed counter struct
1809 * NB: both 1->0 and 0->1 transitions are counted except for
1810 * RI where only 0->1 is counted.
1811 */
1812
1813static int mxser_get_icount(struct tty_struct *tty,
1814 struct serial_icounter_struct *icount)
1815
1816{
1817 struct mxser_port *info = tty->driver_data;
1818 struct async_icount cnow;
1819 unsigned long flags;
1820
1821 spin_lock_irqsave(&info->slock, flags);
1822 cnow = info->icount;
1823 spin_unlock_irqrestore(&info->slock, flags);
1824
1825 icount->frame = cnow.frame;
1826 icount->brk = cnow.brk;
1827 icount->overrun = cnow.overrun;
1828 icount->buf_overrun = cnow.buf_overrun;
1829 icount->parity = cnow.parity;
1830 icount->rx = cnow.rx;
1831 icount->tx = cnow.tx;
1832 icount->cts = cnow.cts;
1833 icount->dsr = cnow.dsr;
1834 icount->rng = cnow.rng;
1835 icount->dcd = cnow.dcd;
1836 return 0;
1837}
1838
1839static void mxser_stoprx(struct tty_struct *tty)
1840{
1841 struct mxser_port *info = tty->driver_data;
1842
1843 info->ldisc_stop_rx = 1;
1844 if (I_IXOFF(tty)) {
1845 if (info->board->chip_flag) {
1846 info->IER &= ~MOXA_MUST_RECV_ISR;
1847 outb(info->IER, info->ioaddr + UART_IER);
1848 } else {
1849 info->x_char = STOP_CHAR(tty);
1850 outb(0, info->ioaddr + UART_IER);
1851 info->IER |= UART_IER_THRI;
1852 outb(info->IER, info->ioaddr + UART_IER);
1853 }
1854 }
1855
1856 if (tty->termios->c_cflag & CRTSCTS) {
1857 info->MCR &= ~UART_MCR_RTS;
1858 outb(info->MCR, info->ioaddr + UART_MCR);
1859 }
1860}
1861
1862/*
1863 * This routine is called by the upper-layer tty layer to signal that
1864 * incoming characters should be throttled.
1865 */
1866static void mxser_throttle(struct tty_struct *tty)
1867{
1868 mxser_stoprx(tty);
1869}
1870
1871static void mxser_unthrottle(struct tty_struct *tty)
1872{
1873 struct mxser_port *info = tty->driver_data;
1874
1875 /* startrx */
1876 info->ldisc_stop_rx = 0;
1877 if (I_IXOFF(tty)) {
1878 if (info->x_char)
1879 info->x_char = 0;
1880 else {
1881 if (info->board->chip_flag) {
1882 info->IER |= MOXA_MUST_RECV_ISR;
1883 outb(info->IER, info->ioaddr + UART_IER);
1884 } else {
1885 info->x_char = START_CHAR(tty);
1886 outb(0, info->ioaddr + UART_IER);
1887 info->IER |= UART_IER_THRI;
1888 outb(info->IER, info->ioaddr + UART_IER);
1889 }
1890 }
1891 }
1892
1893 if (tty->termios->c_cflag & CRTSCTS) {
1894 info->MCR |= UART_MCR_RTS;
1895 outb(info->MCR, info->ioaddr + UART_MCR);
1896 }
1897}
1898
1899/*
1900 * mxser_stop() and mxser_start()
1901 *
1902 * This routines are called before setting or resetting tty->stopped.
1903 * They enable or disable transmitter interrupts, as necessary.
1904 */
1905static void mxser_stop(struct tty_struct *tty)
1906{
1907 struct mxser_port *info = tty->driver_data;
1908 unsigned long flags;
1909
1910 spin_lock_irqsave(&info->slock, flags);
1911 if (info->IER & UART_IER_THRI) {
1912 info->IER &= ~UART_IER_THRI;
1913 outb(info->IER, info->ioaddr + UART_IER);
1914 }
1915 spin_unlock_irqrestore(&info->slock, flags);
1916}
1917
1918static void mxser_start(struct tty_struct *tty)
1919{
1920 struct mxser_port *info = tty->driver_data;
1921 unsigned long flags;
1922
1923 spin_lock_irqsave(&info->slock, flags);
1924 if (info->xmit_cnt && info->port.xmit_buf) {
1925 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1926 info->IER |= UART_IER_THRI;
1927 outb(info->IER, info->ioaddr + UART_IER);
1928 }
1929 spin_unlock_irqrestore(&info->slock, flags);
1930}
1931
1932static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1933{
1934 struct mxser_port *info = tty->driver_data;
1935 unsigned long flags;
1936
1937 spin_lock_irqsave(&info->slock, flags);
1938 mxser_change_speed(tty, old_termios);
1939 spin_unlock_irqrestore(&info->slock, flags);
1940
1941 if ((old_termios->c_cflag & CRTSCTS) &&
1942 !(tty->termios->c_cflag & CRTSCTS)) {
1943 tty->hw_stopped = 0;
1944 mxser_start(tty);
1945 }
1946
1947 /* Handle sw stopped */
1948 if ((old_termios->c_iflag & IXON) &&
1949 !(tty->termios->c_iflag & IXON)) {
1950 tty->stopped = 0;
1951
1952 if (info->board->chip_flag) {
1953 spin_lock_irqsave(&info->slock, flags);
1954 mxser_disable_must_rx_software_flow_control(
1955 info->ioaddr);
1956 spin_unlock_irqrestore(&info->slock, flags);
1957 }
1958
1959 mxser_start(tty);
1960 }
1961}
1962
1963/*
1964 * mxser_wait_until_sent() --- wait until the transmitter is empty
1965 */
1966static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1967{
1968 struct mxser_port *info = tty->driver_data;
1969 unsigned long orig_jiffies, char_time;
1970 unsigned long flags;
1971 int lsr;
1972
1973 if (info->type == PORT_UNKNOWN)
1974 return;
1975
1976 if (info->xmit_fifo_size == 0)
1977 return; /* Just in case.... */
1978
1979 orig_jiffies = jiffies;
1980 /*
1981 * Set the check interval to be 1/5 of the estimated time to
1982 * send a single character, and make it at least 1. The check
1983 * interval should also be less than the timeout.
1984 *
1985 * Note: we have to use pretty tight timings here to satisfy
1986 * the NIST-PCTS.
1987 */
1988 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1989 char_time = char_time / 5;
1990 if (char_time == 0)
1991 char_time = 1;
1992 if (timeout && timeout < char_time)
1993 char_time = timeout;
1994 /*
1995 * If the transmitter hasn't cleared in twice the approximate
1996 * amount of time to send the entire FIFO, it probably won't
1997 * ever clear. This assumes the UART isn't doing flow
1998 * control, which is currently the case. Hence, if it ever
1999 * takes longer than info->timeout, this is probably due to a
2000 * UART bug of some kind. So, we clamp the timeout parameter at
2001 * 2*info->timeout.
2002 */
2003 if (!timeout || timeout > 2 * info->timeout)
2004 timeout = 2 * info->timeout;
2005
2006 spin_lock_irqsave(&info->slock, flags);
2007 while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
2008 spin_unlock_irqrestore(&info->slock, flags);
2009 schedule_timeout_interruptible(char_time);
2010 spin_lock_irqsave(&info->slock, flags);
2011 if (signal_pending(current))
2012 break;
2013 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2014 break;
2015 }
2016 spin_unlock_irqrestore(&info->slock, flags);
2017 set_current_state(TASK_RUNNING);
2018}
2019
2020/*
2021 * This routine is called by tty_hangup() when a hangup is signaled.
2022 */
2023static void mxser_hangup(struct tty_struct *tty)
2024{
2025 struct mxser_port *info = tty->driver_data;
2026
2027 mxser_flush_buffer(tty);
2028 tty_port_hangup(&info->port);
2029}
2030
2031/*
2032 * mxser_rs_break() --- routine which turns the break handling on or off
2033 */
2034static int mxser_rs_break(struct tty_struct *tty, int break_state)
2035{
2036 struct mxser_port *info = tty->driver_data;
2037 unsigned long flags;
2038
2039 spin_lock_irqsave(&info->slock, flags);
2040 if (break_state == -1)
2041 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2042 info->ioaddr + UART_LCR);
2043 else
2044 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2045 info->ioaddr + UART_LCR);
2046 spin_unlock_irqrestore(&info->slock, flags);
2047 return 0;
2048}
2049
2050static void mxser_receive_chars(struct tty_struct *tty,
2051 struct mxser_port *port, int *status)
2052{
2053 unsigned char ch, gdl;
2054 int ignored = 0;
2055 int cnt = 0;
2056 int recv_room;
2057 int max = 256;
2058
2059 recv_room = tty->receive_room;
2060 if (recv_room == 0 && !port->ldisc_stop_rx)
2061 mxser_stoprx(tty);
2062 if (port->board->chip_flag != MOXA_OTHER_UART) {
2063
2064 if (*status & UART_LSR_SPECIAL)
2065 goto intr_old;
2066 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2067 (*status & MOXA_MUST_LSR_RERR))
2068 goto intr_old;
2069 if (*status & MOXA_MUST_LSR_RERR)
2070 goto intr_old;
2071
2072 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2073
2074 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2075 gdl &= MOXA_MUST_GDL_MASK;
2076 if (gdl >= recv_room) {
2077 if (!port->ldisc_stop_rx)
2078 mxser_stoprx(tty);
2079 }
2080 while (gdl--) {
2081 ch = inb(port->ioaddr + UART_RX);
2082 tty_insert_flip_char(tty, ch, 0);
2083 cnt++;
2084 }
2085 goto end_intr;
2086 }
2087intr_old:
2088
2089 do {
2090 if (max-- < 0)
2091 break;
2092
2093 ch = inb(port->ioaddr + UART_RX);
2094 if (port->board->chip_flag && (*status & UART_LSR_OE))
2095 outb(0x23, port->ioaddr + UART_FCR);
2096 *status &= port->read_status_mask;
2097 if (*status & port->ignore_status_mask) {
2098 if (++ignored > 100)
2099 break;
2100 } else {
2101 char flag = 0;
2102 if (*status & UART_LSR_SPECIAL) {
2103 if (*status & UART_LSR_BI) {
2104 flag = TTY_BREAK;
2105 port->icount.brk++;
2106
2107 if (port->port.flags & ASYNC_SAK)
2108 do_SAK(tty);
2109 } else if (*status & UART_LSR_PE) {
2110 flag = TTY_PARITY;
2111 port->icount.parity++;
2112 } else if (*status & UART_LSR_FE) {
2113 flag = TTY_FRAME;
2114 port->icount.frame++;
2115 } else if (*status & UART_LSR_OE) {
2116 flag = TTY_OVERRUN;
2117 port->icount.overrun++;
2118 } else
2119 flag = TTY_BREAK;
2120 }
2121 tty_insert_flip_char(tty, ch, flag);
2122 cnt++;
2123 if (cnt >= recv_room) {
2124 if (!port->ldisc_stop_rx)
2125 mxser_stoprx(tty);
2126 break;
2127 }
2128
2129 }
2130
2131 if (port->board->chip_flag)
2132 break;
2133
2134 *status = inb(port->ioaddr + UART_LSR);
2135 } while (*status & UART_LSR_DR);
2136
2137end_intr:
2138 mxvar_log.rxcnt[tty->index] += cnt;
2139 port->mon_data.rxcnt += cnt;
2140 port->mon_data.up_rxcnt += cnt;
2141
2142 /*
2143 * We are called from an interrupt context with &port->slock
2144 * being held. Drop it temporarily in order to prevent
2145 * recursive locking.
2146 */
2147 spin_unlock(&port->slock);
2148 tty_flip_buffer_push(tty);
2149 spin_lock(&port->slock);
2150}
2151
2152static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port)
2153{
2154 int count, cnt;
2155
2156 if (port->x_char) {
2157 outb(port->x_char, port->ioaddr + UART_TX);
2158 port->x_char = 0;
2159 mxvar_log.txcnt[tty->index]++;
2160 port->mon_data.txcnt++;
2161 port->mon_data.up_txcnt++;
2162 port->icount.tx++;
2163 return;
2164 }
2165
2166 if (port->port.xmit_buf == NULL)
2167 return;
2168
2169 if (port->xmit_cnt <= 0 || tty->stopped ||
2170 (tty->hw_stopped &&
2171 (port->type != PORT_16550A) &&
2172 (!port->board->chip_flag))) {
2173 port->IER &= ~UART_IER_THRI;
2174 outb(port->IER, port->ioaddr + UART_IER);
2175 return;
2176 }
2177
2178 cnt = port->xmit_cnt;
2179 count = port->xmit_fifo_size;
2180 do {
2181 outb(port->port.xmit_buf[port->xmit_tail++],
2182 port->ioaddr + UART_TX);
2183 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2184 if (--port->xmit_cnt <= 0)
2185 break;
2186 } while (--count > 0);
2187 mxvar_log.txcnt[tty->index] += (cnt - port->xmit_cnt);
2188
2189 port->mon_data.txcnt += (cnt - port->xmit_cnt);
2190 port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2191 port->icount.tx += (cnt - port->xmit_cnt);
2192
2193 if (port->xmit_cnt < WAKEUP_CHARS)
2194 tty_wakeup(tty);
2195
2196 if (port->xmit_cnt <= 0) {
2197 port->IER &= ~UART_IER_THRI;
2198 outb(port->IER, port->ioaddr + UART_IER);
2199 }
2200}
2201
2202/*
2203 * This is the serial driver's generic interrupt routine
2204 */
2205static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2206{
2207 int status, iir, i;
2208 struct mxser_board *brd = NULL;
2209 struct mxser_port *port;
2210 int max, irqbits, bits, msr;
2211 unsigned int int_cnt, pass_counter = 0;
2212 int handled = IRQ_NONE;
2213 struct tty_struct *tty;
2214
2215 for (i = 0; i < MXSER_BOARDS; i++)
2216 if (dev_id == &mxser_boards[i]) {
2217 brd = dev_id;
2218 break;
2219 }
2220
2221 if (i == MXSER_BOARDS)
2222 goto irq_stop;
2223 if (brd == NULL)
2224 goto irq_stop;
2225 max = brd->info->nports;
2226 while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
2227 irqbits = inb(brd->vector) & brd->vector_mask;
2228 if (irqbits == brd->vector_mask)
2229 break;
2230
2231 handled = IRQ_HANDLED;
2232 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2233 if (irqbits == brd->vector_mask)
2234 break;
2235 if (bits & irqbits)
2236 continue;
2237 port = &brd->ports[i];
2238
2239 int_cnt = 0;
2240 spin_lock(&port->slock);
2241 do {
2242 iir = inb(port->ioaddr + UART_IIR);
2243 if (iir & UART_IIR_NO_INT)
2244 break;
2245 iir &= MOXA_MUST_IIR_MASK;
2246 tty = tty_port_tty_get(&port->port);
2247 if (!tty ||
2248 (port->port.flags & ASYNC_CLOSING) ||
2249 !(port->port.flags &
2250 ASYNC_INITIALIZED)) {
2251 status = inb(port->ioaddr + UART_LSR);
2252 outb(0x27, port->ioaddr + UART_FCR);
2253 inb(port->ioaddr + UART_MSR);
2254 tty_kref_put(tty);
2255 break;
2256 }
2257
2258 status = inb(port->ioaddr + UART_LSR);
2259
2260 if (status & UART_LSR_PE)
2261 port->err_shadow |= NPPI_NOTIFY_PARITY;
2262 if (status & UART_LSR_FE)
2263 port->err_shadow |= NPPI_NOTIFY_FRAMING;
2264 if (status & UART_LSR_OE)
2265 port->err_shadow |=
2266 NPPI_NOTIFY_HW_OVERRUN;
2267 if (status & UART_LSR_BI)
2268 port->err_shadow |= NPPI_NOTIFY_BREAK;
2269
2270 if (port->board->chip_flag) {
2271 if (iir == MOXA_MUST_IIR_GDA ||
2272 iir == MOXA_MUST_IIR_RDA ||
2273 iir == MOXA_MUST_IIR_RTO ||
2274 iir == MOXA_MUST_IIR_LSR)
2275 mxser_receive_chars(tty, port,
2276 &status);
2277
2278 } else {
2279 status &= port->read_status_mask;
2280 if (status & UART_LSR_DR)
2281 mxser_receive_chars(tty, port,
2282 &status);
2283 }
2284 msr = inb(port->ioaddr + UART_MSR);
2285 if (msr & UART_MSR_ANY_DELTA)
2286 mxser_check_modem_status(tty, port, msr);
2287
2288 if (port->board->chip_flag) {
2289 if (iir == 0x02 && (status &
2290 UART_LSR_THRE))
2291 mxser_transmit_chars(tty, port);
2292 } else {
2293 if (status & UART_LSR_THRE)
2294 mxser_transmit_chars(tty, port);
2295 }
2296 tty_kref_put(tty);
2297 } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2298 spin_unlock(&port->slock);
2299 }
2300 }
2301
2302irq_stop:
2303 return handled;
2304}
2305
2306static const struct tty_operations mxser_ops = {
2307 .open = mxser_open,
2308 .close = mxser_close,
2309 .write = mxser_write,
2310 .put_char = mxser_put_char,
2311 .flush_chars = mxser_flush_chars,
2312 .write_room = mxser_write_room,
2313 .chars_in_buffer = mxser_chars_in_buffer,
2314 .flush_buffer = mxser_flush_buffer,
2315 .ioctl = mxser_ioctl,
2316 .throttle = mxser_throttle,
2317 .unthrottle = mxser_unthrottle,
2318 .set_termios = mxser_set_termios,
2319 .stop = mxser_stop,
2320 .start = mxser_start,
2321 .hangup = mxser_hangup,
2322 .break_ctl = mxser_rs_break,
2323 .wait_until_sent = mxser_wait_until_sent,
2324 .tiocmget = mxser_tiocmget,
2325 .tiocmset = mxser_tiocmset,
2326 .get_icount = mxser_get_icount,
2327};
2328
2329static struct tty_port_operations mxser_port_ops = {
2330 .carrier_raised = mxser_carrier_raised,
2331 .dtr_rts = mxser_dtr_rts,
2332 .activate = mxser_activate,
2333 .shutdown = mxser_shutdown_port,
2334};
2335
2336/*
2337 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2338 */
2339
2340static void mxser_release_ISA_res(struct mxser_board *brd)
2341{
2342 free_irq(brd->irq, brd);
2343 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2344 release_region(brd->vector, 1);
2345}
2346
2347static int __devinit mxser_initbrd(struct mxser_board *brd,
2348 struct pci_dev *pdev)
2349{
2350 struct mxser_port *info;
2351 unsigned int i;
2352 int retval;
2353
2354 printk(KERN_INFO "mxser: max. baud rate = %d bps\n",
2355 brd->ports[0].max_baud);
2356
2357 for (i = 0; i < brd->info->nports; i++) {
2358 info = &brd->ports[i];
2359 tty_port_init(&info->port);
2360 info->port.ops = &mxser_port_ops;
2361 info->board = brd;
2362 info->stop_rx = 0;
2363 info->ldisc_stop_rx = 0;
2364
2365 /* Enhance mode enabled here */
2366 if (brd->chip_flag != MOXA_OTHER_UART)
2367 mxser_enable_must_enchance_mode(info->ioaddr);
2368
2369 info->port.flags = ASYNC_SHARE_IRQ;
2370 info->type = brd->uart_type;
2371
2372 process_txrx_fifo(info);
2373
2374 info->custom_divisor = info->baud_base * 16;
2375 info->port.close_delay = 5 * HZ / 10;
2376 info->port.closing_wait = 30 * HZ;
2377 info->normal_termios = mxvar_sdriver->init_termios;
2378 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2379 info->err_shadow = 0;
2380 spin_lock_init(&info->slock);
2381
2382 /* before set INT ISR, disable all int */
2383 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2384 info->ioaddr + UART_IER);
2385 }
2386
2387 retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
2388 brd);
2389 if (retval)
2390 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2391 "conflict with another device.\n",
2392 brd->info->name, brd->irq);
2393
2394 return retval;
2395}
2396
2397static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2398{
2399 int id, i, bits;
2400 unsigned short regs[16], irq;
2401 unsigned char scratch, scratch2;
2402
2403 brd->chip_flag = MOXA_OTHER_UART;
2404
2405 id = mxser_read_register(cap, regs);
2406 switch (id) {
2407 case C168_ASIC_ID:
2408 brd->info = &mxser_cards[0];
2409 break;
2410 case C104_ASIC_ID:
2411 brd->info = &mxser_cards[1];
2412 break;
2413 case CI104J_ASIC_ID:
2414 brd->info = &mxser_cards[2];
2415 break;
2416 case C102_ASIC_ID:
2417 brd->info = &mxser_cards[5];
2418 break;
2419 case CI132_ASIC_ID:
2420 brd->info = &mxser_cards[6];
2421 break;
2422 case CI134_ASIC_ID:
2423 brd->info = &mxser_cards[7];
2424 break;
2425 default:
2426 return 0;
2427 }
2428
2429 irq = 0;
2430 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2431 Flag-hack checks if configuration should be read as 2-port here. */
2432 if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2433 irq = regs[9] & 0xF000;
2434 irq = irq | (irq >> 4);
2435 if (irq != (regs[9] & 0xFF00))
2436 goto err_irqconflict;
2437 } else if (brd->info->nports == 4) {
2438 irq = regs[9] & 0xF000;
2439 irq = irq | (irq >> 4);
2440 irq = irq | (irq >> 8);
2441 if (irq != regs[9])
2442 goto err_irqconflict;
2443 } else if (brd->info->nports == 8) {
2444 irq = regs[9] & 0xF000;
2445 irq = irq | (irq >> 4);
2446 irq = irq | (irq >> 8);
2447 if ((irq != regs[9]) || (irq != regs[10]))
2448 goto err_irqconflict;
2449 }
2450
2451 if (!irq) {
2452 printk(KERN_ERR "mxser: interrupt number unset\n");
2453 return -EIO;
2454 }
2455 brd->irq = ((int)(irq & 0xF000) >> 12);
2456 for (i = 0; i < 8; i++)
2457 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2458 if ((regs[12] & 0x80) == 0) {
2459 printk(KERN_ERR "mxser: invalid interrupt vector\n");
2460 return -EIO;
2461 }
2462 brd->vector = (int)regs[11]; /* interrupt vector */
2463 if (id == 1)
2464 brd->vector_mask = 0x00FF;
2465 else
2466 brd->vector_mask = 0x000F;
2467 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2468 if (regs[12] & bits) {
2469 brd->ports[i].baud_base = 921600;
2470 brd->ports[i].max_baud = 921600;
2471 } else {
2472 brd->ports[i].baud_base = 115200;
2473 brd->ports[i].max_baud = 115200;
2474 }
2475 }
2476 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2477 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2478 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
2479 outb(scratch2, cap + UART_LCR);
2480 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2481 scratch = inb(cap + UART_IIR);
2482
2483 if (scratch & 0xC0)
2484 brd->uart_type = PORT_16550A;
2485 else
2486 brd->uart_type = PORT_16450;
2487 if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2488 "mxser(IO)")) {
2489 printk(KERN_ERR "mxser: can't request ports I/O region: "
2490 "0x%.8lx-0x%.8lx\n",
2491 brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2492 8 * brd->info->nports - 1);
2493 return -EIO;
2494 }
2495 if (!request_region(brd->vector, 1, "mxser(vector)")) {
2496 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2497 printk(KERN_ERR "mxser: can't request interrupt vector region: "
2498 "0x%.8lx-0x%.8lx\n",
2499 brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2500 8 * brd->info->nports - 1);
2501 return -EIO;
2502 }
2503 return brd->info->nports;
2504
2505err_irqconflict:
2506 printk(KERN_ERR "mxser: invalid interrupt number\n");
2507 return -EIO;
2508}
2509
2510static int __devinit mxser_probe(struct pci_dev *pdev,
2511 const struct pci_device_id *ent)
2512{
2513#ifdef CONFIG_PCI
2514 struct mxser_board *brd;
2515 unsigned int i, j;
2516 unsigned long ioaddress;
2517 int retval = -EINVAL;
2518
2519 for (i = 0; i < MXSER_BOARDS; i++)
2520 if (mxser_boards[i].info == NULL)
2521 break;
2522
2523 if (i >= MXSER_BOARDS) {
2524 dev_err(&pdev->dev, "too many boards found (maximum %d), board "
2525 "not configured\n", MXSER_BOARDS);
2526 goto err;
2527 }
2528
2529 brd = &mxser_boards[i];
2530 brd->idx = i * MXSER_PORTS_PER_BOARD;
2531 dev_info(&pdev->dev, "found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2532 mxser_cards[ent->driver_data].name,
2533 pdev->bus->number, PCI_SLOT(pdev->devfn));
2534
2535 retval = pci_enable_device(pdev);
2536 if (retval) {
2537 dev_err(&pdev->dev, "PCI enable failed\n");
2538 goto err;
2539 }
2540
2541 /* io address */
2542 ioaddress = pci_resource_start(pdev, 2);
2543 retval = pci_request_region(pdev, 2, "mxser(IO)");
2544 if (retval)
2545 goto err_dis;
2546
2547 brd->info = &mxser_cards[ent->driver_data];
2548 for (i = 0; i < brd->info->nports; i++)
2549 brd->ports[i].ioaddr = ioaddress + 8 * i;
2550
2551 /* vector */
2552 ioaddress = pci_resource_start(pdev, 3);
2553 retval = pci_request_region(pdev, 3, "mxser(vector)");
2554 if (retval)
2555 goto err_zero;
2556 brd->vector = ioaddress;
2557
2558 /* irq */
2559 brd->irq = pdev->irq;
2560
2561 brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2562 brd->uart_type = PORT_16550A;
2563 brd->vector_mask = 0;
2564
2565 for (i = 0; i < brd->info->nports; i++) {
2566 for (j = 0; j < UART_INFO_NUM; j++) {
2567 if (Gpci_uart_info[j].type == brd->chip_flag) {
2568 brd->ports[i].max_baud =
2569 Gpci_uart_info[j].max_baud;
2570
2571 /* exception....CP-102 */
2572 if (brd->info->flags & MXSER_HIGHBAUD)
2573 brd->ports[i].max_baud = 921600;
2574 break;
2575 }
2576 }
2577 }
2578
2579 if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2580 for (i = 0; i < brd->info->nports; i++) {
2581 if (i < 4)
2582 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2583 else
2584 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2585 }
2586 outb(0, ioaddress + 4); /* default set to RS232 mode */
2587 outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
2588 }
2589
2590 for (i = 0; i < brd->info->nports; i++) {
2591 brd->vector_mask |= (1 << i);
2592 brd->ports[i].baud_base = 921600;
2593 }
2594
2595 /* mxser_initbrd will hook ISR. */
2596 retval = mxser_initbrd(brd, pdev);
2597 if (retval)
2598 goto err_rel3;
2599
2600 for (i = 0; i < brd->info->nports; i++)
2601 tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
2602
2603 pci_set_drvdata(pdev, brd);
2604
2605 return 0;
2606err_rel3:
2607 pci_release_region(pdev, 3);
2608err_zero:
2609 brd->info = NULL;
2610 pci_release_region(pdev, 2);
2611err_dis:
2612 pci_disable_device(pdev);
2613err:
2614 return retval;
2615#else
2616 return -ENODEV;
2617#endif
2618}
2619
2620static void __devexit mxser_remove(struct pci_dev *pdev)
2621{
2622#ifdef CONFIG_PCI
2623 struct mxser_board *brd = pci_get_drvdata(pdev);
2624 unsigned int i;
2625
2626 for (i = 0; i < brd->info->nports; i++)
2627 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2628
2629 free_irq(pdev->irq, brd);
2630 pci_release_region(pdev, 2);
2631 pci_release_region(pdev, 3);
2632 pci_disable_device(pdev);
2633 brd->info = NULL;
2634#endif
2635}
2636
2637static struct pci_driver mxser_driver = {
2638 .name = "mxser",
2639 .id_table = mxser_pcibrds,
2640 .probe = mxser_probe,
2641 .remove = __devexit_p(mxser_remove)
2642};
2643
2644static int __init mxser_module_init(void)
2645{
2646 struct mxser_board *brd;
2647 unsigned int b, i, m;
2648 int retval;
2649
2650 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2651 if (!mxvar_sdriver)
2652 return -ENOMEM;
2653
2654 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2655 MXSER_VERSION);
2656
2657 /* Initialize the tty_driver structure */
2658 mxvar_sdriver->name = "ttyMI";
2659 mxvar_sdriver->major = ttymajor;
2660 mxvar_sdriver->minor_start = 0;
2661 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2662 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2663 mxvar_sdriver->init_termios = tty_std_termios;
2664 mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2665 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2666 tty_set_operations(mxvar_sdriver, &mxser_ops);
2667
2668 retval = tty_register_driver(mxvar_sdriver);
2669 if (retval) {
2670 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2671 "tty driver !\n");
2672 goto err_put;
2673 }
2674
2675 /* Start finding ISA boards here */
2676 for (m = 0, b = 0; b < MXSER_BOARDS; b++) {
2677 if (!ioaddr[b])
2678 continue;
2679
2680 brd = &mxser_boards[m];
2681 retval = mxser_get_ISA_conf(ioaddr[b], brd);
2682 if (retval <= 0) {
2683 brd->info = NULL;
2684 continue;
2685 }
2686
2687 printk(KERN_INFO "mxser: found MOXA %s board (CAP=0x%lx)\n",
2688 brd->info->name, ioaddr[b]);
2689
2690 /* mxser_initbrd will hook ISR. */
2691 if (mxser_initbrd(brd, NULL) < 0) {
2692 brd->info = NULL;
2693 continue;
2694 }
2695
2696 brd->idx = m * MXSER_PORTS_PER_BOARD;
2697 for (i = 0; i < brd->info->nports; i++)
2698 tty_register_device(mxvar_sdriver, brd->idx + i, NULL);
2699
2700 m++;
2701 }
2702
2703 retval = pci_register_driver(&mxser_driver);
2704 if (retval) {
2705 printk(KERN_ERR "mxser: can't register pci driver\n");
2706 if (!m) {
2707 retval = -ENODEV;
2708 goto err_unr;
2709 } /* else: we have some ISA cards under control */
2710 }
2711
2712 return 0;
2713err_unr:
2714 tty_unregister_driver(mxvar_sdriver);
2715err_put:
2716 put_tty_driver(mxvar_sdriver);
2717 return retval;
2718}
2719
2720static void __exit mxser_module_exit(void)
2721{
2722 unsigned int i, j;
2723
2724 pci_unregister_driver(&mxser_driver);
2725
2726 for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2727 if (mxser_boards[i].info != NULL)
2728 for (j = 0; j < mxser_boards[i].info->nports; j++)
2729 tty_unregister_device(mxvar_sdriver,
2730 mxser_boards[i].idx + j);
2731 tty_unregister_driver(mxvar_sdriver);
2732 put_tty_driver(mxvar_sdriver);
2733
2734 for (i = 0; i < MXSER_BOARDS; i++)
2735 if (mxser_boards[i].info != NULL)
2736 mxser_release_ISA_res(&mxser_boards[i]);
2737}
2738
2739module_init(mxser_module_init);
2740module_exit(mxser_module_exit);