Loading...
1// SPDX-License-Identifier: GPL-2.0+
2/*****************************************************************************/
3/*
4 * moxa.c -- MOXA Intellio family multiport serial driver.
5 *
6 * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com).
7 * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
8 *
9 * This code is loosely based on the Linux serial driver, written by
10 * Linus Torvalds, Theodore T'so and others.
11 */
12
13/*
14 * MOXA Intellio Series Driver
15 * for : LINUX
16 * date : 1999/1/7
17 * version : 5.1
18 */
19
20#include <linux/module.h>
21#include <linux/types.h>
22#include <linux/mm.h>
23#include <linux/ioport.h>
24#include <linux/errno.h>
25#include <linux/firmware.h>
26#include <linux/signal.h>
27#include <linux/sched.h>
28#include <linux/timer.h>
29#include <linux/interrupt.h>
30#include <linux/tty.h>
31#include <linux/tty_flip.h>
32#include <linux/major.h>
33#include <linux/string.h>
34#include <linux/fcntl.h>
35#include <linux/ptrace.h>
36#include <linux/serial.h>
37#include <linux/tty_driver.h>
38#include <linux/delay.h>
39#include <linux/pci.h>
40#include <linux/init.h>
41#include <linux/bitops.h>
42#include <linux/slab.h>
43#include <linux/ratelimit.h>
44
45#include <asm/io.h>
46#include <linux/uaccess.h>
47
48#include "moxa.h"
49
50#define MOXA_VERSION "6.0k"
51
52#define MOXA_FW_HDRLEN 32
53
54#define MOXAMAJOR 172
55
56#define MAX_BOARDS 4 /* Don't change this value */
57#define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
58#define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
59
60#define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \
61 (brd)->boardType == MOXA_BOARD_C320_PCI)
62
63/*
64 * Define the Moxa PCI vendor and device IDs.
65 */
66#define MOXA_BUS_TYPE_ISA 0
67#define MOXA_BUS_TYPE_PCI 1
68
69enum {
70 MOXA_BOARD_C218_PCI = 1,
71 MOXA_BOARD_C218_ISA,
72 MOXA_BOARD_C320_PCI,
73 MOXA_BOARD_C320_ISA,
74 MOXA_BOARD_CP204J,
75};
76
77static char *moxa_brdname[] =
78{
79 "C218 Turbo PCI series",
80 "C218 Turbo ISA series",
81 "C320 Turbo PCI series",
82 "C320 Turbo ISA series",
83 "CP-204J series",
84};
85
86#ifdef CONFIG_PCI
87static const struct pci_device_id moxa_pcibrds[] = {
88 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218),
89 .driver_data = MOXA_BOARD_C218_PCI },
90 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320),
91 .driver_data = MOXA_BOARD_C320_PCI },
92 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J),
93 .driver_data = MOXA_BOARD_CP204J },
94 { 0 }
95};
96MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
97#endif /* CONFIG_PCI */
98
99struct moxa_port;
100
101static struct moxa_board_conf {
102 int boardType;
103 int numPorts;
104 int busType;
105
106 unsigned int ready;
107
108 struct moxa_port *ports;
109
110 void __iomem *basemem;
111 void __iomem *intNdx;
112 void __iomem *intPend;
113 void __iomem *intTable;
114} moxa_boards[MAX_BOARDS];
115
116struct mxser_mstatus {
117 tcflag_t cflag;
118 int cts;
119 int dsr;
120 int ri;
121 int dcd;
122};
123
124struct moxaq_str {
125 int inq;
126 int outq;
127};
128
129struct moxa_port {
130 struct tty_port port;
131 struct moxa_board_conf *board;
132 void __iomem *tableAddr;
133
134 int type;
135 int cflag;
136 unsigned long statusflags;
137
138 u8 DCDState; /* Protected by the port lock */
139 u8 lineCtrl;
140 u8 lowChkFlag;
141};
142
143struct mon_str {
144 int tick;
145 int rxcnt[MAX_PORTS];
146 int txcnt[MAX_PORTS];
147};
148
149/* statusflags */
150#define TXSTOPPED 1
151#define LOWWAIT 2
152#define EMPTYWAIT 3
153
154
155#define WAKEUP_CHARS 256
156
157static int ttymajor = MOXAMAJOR;
158static struct mon_str moxaLog;
159static unsigned int moxaFuncTout = HZ / 2;
160static unsigned int moxaLowWaterChk;
161static DEFINE_MUTEX(moxa_openlock);
162static DEFINE_SPINLOCK(moxa_lock);
163
164static unsigned long baseaddr[MAX_BOARDS];
165static unsigned int type[MAX_BOARDS];
166static unsigned int numports[MAX_BOARDS];
167static struct tty_port moxa_service_port;
168
169MODULE_AUTHOR("William Chen");
170MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
171MODULE_LICENSE("GPL");
172MODULE_FIRMWARE("c218tunx.cod");
173MODULE_FIRMWARE("cp204unx.cod");
174MODULE_FIRMWARE("c320tunx.cod");
175
176module_param_array(type, uint, NULL, 0);
177MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
178module_param_hw_array(baseaddr, ulong, ioport, NULL, 0);
179MODULE_PARM_DESC(baseaddr, "base address");
180module_param_array(numports, uint, NULL, 0);
181MODULE_PARM_DESC(numports, "numports (ignored for C218)");
182
183module_param(ttymajor, int, 0);
184
185/*
186 * static functions:
187 */
188static int moxa_open(struct tty_struct *, struct file *);
189static void moxa_close(struct tty_struct *, struct file *);
190static int moxa_write(struct tty_struct *, const unsigned char *, int);
191static int moxa_write_room(struct tty_struct *);
192static void moxa_flush_buffer(struct tty_struct *);
193static int moxa_chars_in_buffer(struct tty_struct *);
194static void moxa_set_termios(struct tty_struct *, struct ktermios *);
195static void moxa_stop(struct tty_struct *);
196static void moxa_start(struct tty_struct *);
197static void moxa_hangup(struct tty_struct *);
198static int moxa_tiocmget(struct tty_struct *tty);
199static int moxa_tiocmset(struct tty_struct *tty,
200 unsigned int set, unsigned int clear);
201static void moxa_poll(struct timer_list *);
202static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
203static void moxa_shutdown(struct tty_port *);
204static int moxa_carrier_raised(struct tty_port *);
205static void moxa_dtr_rts(struct tty_port *, int);
206/*
207 * moxa board interface functions:
208 */
209static void MoxaPortEnable(struct moxa_port *);
210static void MoxaPortDisable(struct moxa_port *);
211static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
212static int MoxaPortGetLineOut(struct moxa_port *, int *, int *);
213static void MoxaPortLineCtrl(struct moxa_port *, int, int);
214static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
215static int MoxaPortLineStatus(struct moxa_port *);
216static void MoxaPortFlushData(struct moxa_port *, int);
217static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int);
218static int MoxaPortReadData(struct moxa_port *);
219static int MoxaPortTxQueue(struct moxa_port *);
220static int MoxaPortRxQueue(struct moxa_port *);
221static int MoxaPortTxFree(struct moxa_port *);
222static void MoxaPortTxDisable(struct moxa_port *);
223static void MoxaPortTxEnable(struct moxa_port *);
224static int moxa_get_serial_info(struct tty_struct *, struct serial_struct *);
225static int moxa_set_serial_info(struct tty_struct *, struct serial_struct *);
226static void MoxaSetFifo(struct moxa_port *port, int enable);
227
228/*
229 * I/O functions
230 */
231
232static DEFINE_SPINLOCK(moxafunc_lock);
233
234static void moxa_wait_finish(void __iomem *ofsAddr)
235{
236 unsigned long end = jiffies + moxaFuncTout;
237
238 while (readw(ofsAddr + FuncCode) != 0)
239 if (time_after(jiffies, end))
240 return;
241 if (readw(ofsAddr + FuncCode) != 0)
242 printk_ratelimited(KERN_WARNING "moxa function expired\n");
243}
244
245static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
246{
247 unsigned long flags;
248 spin_lock_irqsave(&moxafunc_lock, flags);
249 writew(arg, ofsAddr + FuncArg);
250 writew(cmd, ofsAddr + FuncCode);
251 moxa_wait_finish(ofsAddr);
252 spin_unlock_irqrestore(&moxafunc_lock, flags);
253}
254
255static int moxafuncret(void __iomem *ofsAddr, u16 cmd, u16 arg)
256{
257 unsigned long flags;
258 u16 ret;
259 spin_lock_irqsave(&moxafunc_lock, flags);
260 writew(arg, ofsAddr + FuncArg);
261 writew(cmd, ofsAddr + FuncCode);
262 moxa_wait_finish(ofsAddr);
263 ret = readw(ofsAddr + FuncArg);
264 spin_unlock_irqrestore(&moxafunc_lock, flags);
265 return ret;
266}
267
268static void moxa_low_water_check(void __iomem *ofsAddr)
269{
270 u16 rptr, wptr, mask, len;
271
272 if (readb(ofsAddr + FlagStat) & Xoff_state) {
273 rptr = readw(ofsAddr + RXrptr);
274 wptr = readw(ofsAddr + RXwptr);
275 mask = readw(ofsAddr + RX_mask);
276 len = (wptr - rptr) & mask;
277 if (len <= Low_water)
278 moxafunc(ofsAddr, FC_SendXon, 0);
279 }
280}
281
282/*
283 * TTY operations
284 */
285
286static int moxa_ioctl(struct tty_struct *tty,
287 unsigned int cmd, unsigned long arg)
288{
289 struct moxa_port *ch = tty->driver_data;
290 void __user *argp = (void __user *)arg;
291 int status, ret = 0;
292
293 if (tty->index == MAX_PORTS) {
294 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
295 cmd != MOXA_GETMSTATUS)
296 return -EINVAL;
297 } else if (!ch)
298 return -ENODEV;
299
300 switch (cmd) {
301 case MOXA_GETDATACOUNT:
302 moxaLog.tick = jiffies;
303 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
304 ret = -EFAULT;
305 break;
306 case MOXA_FLUSH_QUEUE:
307 MoxaPortFlushData(ch, arg);
308 break;
309 case MOXA_GET_IOQUEUE: {
310 struct moxaq_str __user *argm = argp;
311 struct moxaq_str tmp;
312 struct moxa_port *p;
313 unsigned int i, j;
314
315 for (i = 0; i < MAX_BOARDS; i++) {
316 p = moxa_boards[i].ports;
317 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
318 memset(&tmp, 0, sizeof(tmp));
319 spin_lock_bh(&moxa_lock);
320 if (moxa_boards[i].ready) {
321 tmp.inq = MoxaPortRxQueue(p);
322 tmp.outq = MoxaPortTxQueue(p);
323 }
324 spin_unlock_bh(&moxa_lock);
325 if (copy_to_user(argm, &tmp, sizeof(tmp)))
326 return -EFAULT;
327 }
328 }
329 break;
330 } case MOXA_GET_OQUEUE:
331 status = MoxaPortTxQueue(ch);
332 ret = put_user(status, (unsigned long __user *)argp);
333 break;
334 case MOXA_GET_IQUEUE:
335 status = MoxaPortRxQueue(ch);
336 ret = put_user(status, (unsigned long __user *)argp);
337 break;
338 case MOXA_GETMSTATUS: {
339 struct mxser_mstatus __user *argm = argp;
340 struct mxser_mstatus tmp;
341 struct moxa_port *p;
342 unsigned int i, j;
343
344 for (i = 0; i < MAX_BOARDS; i++) {
345 p = moxa_boards[i].ports;
346 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
347 struct tty_struct *ttyp;
348 memset(&tmp, 0, sizeof(tmp));
349 spin_lock_bh(&moxa_lock);
350 if (!moxa_boards[i].ready) {
351 spin_unlock_bh(&moxa_lock);
352 goto copy;
353 }
354
355 status = MoxaPortLineStatus(p);
356 spin_unlock_bh(&moxa_lock);
357
358 if (status & 1)
359 tmp.cts = 1;
360 if (status & 2)
361 tmp.dsr = 1;
362 if (status & 4)
363 tmp.dcd = 1;
364
365 ttyp = tty_port_tty_get(&p->port);
366 if (!ttyp)
367 tmp.cflag = p->cflag;
368 else
369 tmp.cflag = ttyp->termios.c_cflag;
370 tty_kref_put(ttyp);
371copy:
372 if (copy_to_user(argm, &tmp, sizeof(tmp)))
373 return -EFAULT;
374 }
375 }
376 break;
377 }
378 default:
379 ret = -ENOIOCTLCMD;
380 }
381 return ret;
382}
383
384static int moxa_break_ctl(struct tty_struct *tty, int state)
385{
386 struct moxa_port *port = tty->driver_data;
387
388 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
389 Magic_code);
390 return 0;
391}
392
393static const struct tty_operations moxa_ops = {
394 .open = moxa_open,
395 .close = moxa_close,
396 .write = moxa_write,
397 .write_room = moxa_write_room,
398 .flush_buffer = moxa_flush_buffer,
399 .chars_in_buffer = moxa_chars_in_buffer,
400 .ioctl = moxa_ioctl,
401 .set_termios = moxa_set_termios,
402 .stop = moxa_stop,
403 .start = moxa_start,
404 .hangup = moxa_hangup,
405 .break_ctl = moxa_break_ctl,
406 .tiocmget = moxa_tiocmget,
407 .tiocmset = moxa_tiocmset,
408 .set_serial = moxa_set_serial_info,
409 .get_serial = moxa_get_serial_info,
410};
411
412static const struct tty_port_operations moxa_port_ops = {
413 .carrier_raised = moxa_carrier_raised,
414 .dtr_rts = moxa_dtr_rts,
415 .shutdown = moxa_shutdown,
416};
417
418static struct tty_driver *moxaDriver;
419static DEFINE_TIMER(moxaTimer, moxa_poll);
420
421/*
422 * HW init
423 */
424
425static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
426{
427 switch (brd->boardType) {
428 case MOXA_BOARD_C218_ISA:
429 case MOXA_BOARD_C218_PCI:
430 if (model != 1)
431 goto err;
432 break;
433 case MOXA_BOARD_CP204J:
434 if (model != 3)
435 goto err;
436 break;
437 default:
438 if (model != 2)
439 goto err;
440 break;
441 }
442 return 0;
443err:
444 return -EINVAL;
445}
446
447static int moxa_check_fw(const void *ptr)
448{
449 const __le16 *lptr = ptr;
450
451 if (*lptr != cpu_to_le16(0x7980))
452 return -EINVAL;
453
454 return 0;
455}
456
457static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
458 size_t len)
459{
460 void __iomem *baseAddr = brd->basemem;
461 u16 tmp;
462
463 writeb(HW_reset, baseAddr + Control_reg); /* reset */
464 msleep(10);
465 memset_io(baseAddr, 0, 4096);
466 memcpy_toio(baseAddr, buf, len); /* download BIOS */
467 writeb(0, baseAddr + Control_reg); /* restart */
468
469 msleep(2000);
470
471 switch (brd->boardType) {
472 case MOXA_BOARD_C218_ISA:
473 case MOXA_BOARD_C218_PCI:
474 tmp = readw(baseAddr + C218_key);
475 if (tmp != C218_KeyCode)
476 goto err;
477 break;
478 case MOXA_BOARD_CP204J:
479 tmp = readw(baseAddr + C218_key);
480 if (tmp != CP204J_KeyCode)
481 goto err;
482 break;
483 default:
484 tmp = readw(baseAddr + C320_key);
485 if (tmp != C320_KeyCode)
486 goto err;
487 tmp = readw(baseAddr + C320_status);
488 if (tmp != STS_init) {
489 printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic "
490 "module not found\n");
491 return -EIO;
492 }
493 break;
494 }
495
496 return 0;
497err:
498 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
499 return -EIO;
500}
501
502static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
503 size_t len)
504{
505 void __iomem *baseAddr = brd->basemem;
506
507 if (len < 7168) {
508 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
509 return -EINVAL;
510 }
511
512 writew(len - 7168 - 2, baseAddr + C320bapi_len);
513 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
514 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
515 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
516 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
517
518 return 0;
519}
520
521static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
522 size_t len)
523{
524 void __iomem *baseAddr = brd->basemem;
525 const __le16 *uptr = ptr;
526 size_t wlen, len2, j;
527 unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
528 unsigned int i, retry;
529 u16 usum, keycode;
530
531 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
532 C218_KeyCode;
533
534 switch (brd->boardType) {
535 case MOXA_BOARD_CP204J:
536 case MOXA_BOARD_C218_ISA:
537 case MOXA_BOARD_C218_PCI:
538 key = C218_key;
539 loadbuf = C218_LoadBuf;
540 loadlen = C218DLoad_len;
541 checksum = C218check_sum;
542 checksum_ok = C218chksum_ok;
543 break;
544 default:
545 key = C320_key;
546 keycode = C320_KeyCode;
547 loadbuf = C320_LoadBuf;
548 loadlen = C320DLoad_len;
549 checksum = C320check_sum;
550 checksum_ok = C320chksum_ok;
551 break;
552 }
553
554 usum = 0;
555 wlen = len >> 1;
556 for (i = 0; i < wlen; i++)
557 usum += le16_to_cpu(uptr[i]);
558 retry = 0;
559 do {
560 wlen = len >> 1;
561 j = 0;
562 while (wlen) {
563 len2 = (wlen > 2048) ? 2048 : wlen;
564 wlen -= len2;
565 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
566 j += len2 << 1;
567
568 writew(len2, baseAddr + loadlen);
569 writew(0, baseAddr + key);
570 for (i = 0; i < 100; i++) {
571 if (readw(baseAddr + key) == keycode)
572 break;
573 msleep(10);
574 }
575 if (readw(baseAddr + key) != keycode)
576 return -EIO;
577 }
578 writew(0, baseAddr + loadlen);
579 writew(usum, baseAddr + checksum);
580 writew(0, baseAddr + key);
581 for (i = 0; i < 100; i++) {
582 if (readw(baseAddr + key) == keycode)
583 break;
584 msleep(10);
585 }
586 retry++;
587 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
588 if (readb(baseAddr + checksum_ok) != 1)
589 return -EIO;
590
591 writew(0, baseAddr + key);
592 for (i = 0; i < 600; i++) {
593 if (readw(baseAddr + Magic_no) == Magic_code)
594 break;
595 msleep(10);
596 }
597 if (readw(baseAddr + Magic_no) != Magic_code)
598 return -EIO;
599
600 if (MOXA_IS_320(brd)) {
601 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
602 writew(0x3800, baseAddr + TMS320_PORT1);
603 writew(0x3900, baseAddr + TMS320_PORT2);
604 writew(28499, baseAddr + TMS320_CLOCK);
605 } else {
606 writew(0x3200, baseAddr + TMS320_PORT1);
607 writew(0x3400, baseAddr + TMS320_PORT2);
608 writew(19999, baseAddr + TMS320_CLOCK);
609 }
610 }
611 writew(1, baseAddr + Disable_IRQ);
612 writew(0, baseAddr + Magic_no);
613 for (i = 0; i < 500; i++) {
614 if (readw(baseAddr + Magic_no) == Magic_code)
615 break;
616 msleep(10);
617 }
618 if (readw(baseAddr + Magic_no) != Magic_code)
619 return -EIO;
620
621 if (MOXA_IS_320(brd)) {
622 j = readw(baseAddr + Module_cnt);
623 if (j <= 0)
624 return -EIO;
625 brd->numPorts = j * 8;
626 writew(j, baseAddr + Module_no);
627 writew(0, baseAddr + Magic_no);
628 for (i = 0; i < 600; i++) {
629 if (readw(baseAddr + Magic_no) == Magic_code)
630 break;
631 msleep(10);
632 }
633 if (readw(baseAddr + Magic_no) != Magic_code)
634 return -EIO;
635 }
636 brd->intNdx = baseAddr + IRQindex;
637 brd->intPend = baseAddr + IRQpending;
638 brd->intTable = baseAddr + IRQtable;
639
640 return 0;
641}
642
643static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
644 size_t len)
645{
646 void __iomem *ofsAddr, *baseAddr = brd->basemem;
647 struct moxa_port *port;
648 int retval, i;
649
650 if (len % 2) {
651 printk(KERN_ERR "MOXA: bios length is not even\n");
652 return -EINVAL;
653 }
654
655 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
656 if (retval)
657 return retval;
658
659 switch (brd->boardType) {
660 case MOXA_BOARD_C218_ISA:
661 case MOXA_BOARD_C218_PCI:
662 case MOXA_BOARD_CP204J:
663 port = brd->ports;
664 for (i = 0; i < brd->numPorts; i++, port++) {
665 port->board = brd;
666 port->DCDState = 0;
667 port->tableAddr = baseAddr + Extern_table +
668 Extern_size * i;
669 ofsAddr = port->tableAddr;
670 writew(C218rx_mask, ofsAddr + RX_mask);
671 writew(C218tx_mask, ofsAddr + TX_mask);
672 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
673 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
674
675 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
676 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
677
678 }
679 break;
680 default:
681 port = brd->ports;
682 for (i = 0; i < brd->numPorts; i++, port++) {
683 port->board = brd;
684 port->DCDState = 0;
685 port->tableAddr = baseAddr + Extern_table +
686 Extern_size * i;
687 ofsAddr = port->tableAddr;
688 switch (brd->numPorts) {
689 case 8:
690 writew(C320p8rx_mask, ofsAddr + RX_mask);
691 writew(C320p8tx_mask, ofsAddr + TX_mask);
692 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
693 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
694 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
695 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
696
697 break;
698 case 16:
699 writew(C320p16rx_mask, ofsAddr + RX_mask);
700 writew(C320p16tx_mask, ofsAddr + TX_mask);
701 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
702 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
703 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
704 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
705 break;
706
707 case 24:
708 writew(C320p24rx_mask, ofsAddr + RX_mask);
709 writew(C320p24tx_mask, ofsAddr + TX_mask);
710 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
711 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
712 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
713 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
714 break;
715 case 32:
716 writew(C320p32rx_mask, ofsAddr + RX_mask);
717 writew(C320p32tx_mask, ofsAddr + TX_mask);
718 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
719 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
720 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
721 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
722 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
723 break;
724 }
725 }
726 break;
727 }
728 return 0;
729}
730
731static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
732{
733 const void *ptr = fw->data;
734 char rsn[64];
735 u16 lens[5];
736 size_t len;
737 unsigned int a, lenp, lencnt;
738 int ret = -EINVAL;
739 struct {
740 __le32 magic; /* 0x34303430 */
741 u8 reserved1[2];
742 u8 type; /* UNIX = 3 */
743 u8 model; /* C218T=1, C320T=2, CP204=3 */
744 u8 reserved2[8];
745 __le16 len[5];
746 } const *hdr = ptr;
747
748 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
749
750 if (fw->size < MOXA_FW_HDRLEN) {
751 strcpy(rsn, "too short (even header won't fit)");
752 goto err;
753 }
754 if (hdr->magic != cpu_to_le32(0x30343034)) {
755 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
756 goto err;
757 }
758 if (hdr->type != 3) {
759 sprintf(rsn, "not for linux, type is %u", hdr->type);
760 goto err;
761 }
762 if (moxa_check_fw_model(brd, hdr->model)) {
763 sprintf(rsn, "not for this card, model is %u", hdr->model);
764 goto err;
765 }
766
767 len = MOXA_FW_HDRLEN;
768 lencnt = hdr->model == 2 ? 5 : 3;
769 for (a = 0; a < ARRAY_SIZE(lens); a++) {
770 lens[a] = le16_to_cpu(hdr->len[a]);
771 if (lens[a] && len + lens[a] <= fw->size &&
772 moxa_check_fw(&fw->data[len]))
773 printk(KERN_WARNING "MOXA firmware: unexpected input "
774 "at offset %u, but going on\n", (u32)len);
775 if (!lens[a] && a < lencnt) {
776 sprintf(rsn, "too few entries in fw file");
777 goto err;
778 }
779 len += lens[a];
780 }
781
782 if (len != fw->size) {
783 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
784 (u32)len);
785 goto err;
786 }
787
788 ptr += MOXA_FW_HDRLEN;
789 lenp = 0; /* bios */
790
791 strcpy(rsn, "read above");
792
793 ret = moxa_load_bios(brd, ptr, lens[lenp]);
794 if (ret)
795 goto err;
796
797 /* we skip the tty section (lens[1]), since we don't need it */
798 ptr += lens[lenp] + lens[lenp + 1];
799 lenp += 2; /* comm */
800
801 if (hdr->model == 2) {
802 ret = moxa_load_320b(brd, ptr, lens[lenp]);
803 if (ret)
804 goto err;
805 /* skip another tty */
806 ptr += lens[lenp] + lens[lenp + 1];
807 lenp += 2;
808 }
809
810 ret = moxa_load_code(brd, ptr, lens[lenp]);
811 if (ret)
812 goto err;
813
814 return 0;
815err:
816 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
817 return ret;
818}
819
820static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
821{
822 const struct firmware *fw;
823 const char *file;
824 struct moxa_port *p;
825 unsigned int i, first_idx;
826 int ret;
827
828 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
829 GFP_KERNEL);
830 if (brd->ports == NULL) {
831 printk(KERN_ERR "cannot allocate memory for ports\n");
832 ret = -ENOMEM;
833 goto err;
834 }
835
836 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
837 tty_port_init(&p->port);
838 p->port.ops = &moxa_port_ops;
839 p->type = PORT_16550A;
840 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
841 }
842
843 switch (brd->boardType) {
844 case MOXA_BOARD_C218_ISA:
845 case MOXA_BOARD_C218_PCI:
846 file = "c218tunx.cod";
847 break;
848 case MOXA_BOARD_CP204J:
849 file = "cp204unx.cod";
850 break;
851 default:
852 file = "c320tunx.cod";
853 break;
854 }
855
856 ret = request_firmware(&fw, file, dev);
857 if (ret) {
858 printk(KERN_ERR "MOXA: request_firmware failed. Make sure "
859 "you've placed '%s' file into your firmware "
860 "loader directory (e.g. /lib/firmware)\n",
861 file);
862 goto err_free;
863 }
864
865 ret = moxa_load_fw(brd, fw);
866
867 release_firmware(fw);
868
869 if (ret)
870 goto err_free;
871
872 spin_lock_bh(&moxa_lock);
873 brd->ready = 1;
874 if (!timer_pending(&moxaTimer))
875 mod_timer(&moxaTimer, jiffies + HZ / 50);
876 spin_unlock_bh(&moxa_lock);
877
878 first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD;
879 for (i = 0; i < brd->numPorts; i++)
880 tty_port_register_device(&brd->ports[i].port, moxaDriver,
881 first_idx + i, dev);
882
883 return 0;
884err_free:
885 for (i = 0; i < MAX_PORTS_PER_BOARD; i++)
886 tty_port_destroy(&brd->ports[i].port);
887 kfree(brd->ports);
888err:
889 return ret;
890}
891
892static void moxa_board_deinit(struct moxa_board_conf *brd)
893{
894 unsigned int a, opened, first_idx;
895
896 mutex_lock(&moxa_openlock);
897 spin_lock_bh(&moxa_lock);
898 brd->ready = 0;
899 spin_unlock_bh(&moxa_lock);
900
901 /* pci hot-un-plug support */
902 for (a = 0; a < brd->numPorts; a++)
903 if (tty_port_initialized(&brd->ports[a].port))
904 tty_port_tty_hangup(&brd->ports[a].port, false);
905
906 for (a = 0; a < MAX_PORTS_PER_BOARD; a++)
907 tty_port_destroy(&brd->ports[a].port);
908
909 while (1) {
910 opened = 0;
911 for (a = 0; a < brd->numPorts; a++)
912 if (tty_port_initialized(&brd->ports[a].port))
913 opened++;
914 mutex_unlock(&moxa_openlock);
915 if (!opened)
916 break;
917 msleep(50);
918 mutex_lock(&moxa_openlock);
919 }
920
921 first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD;
922 for (a = 0; a < brd->numPorts; a++)
923 tty_unregister_device(moxaDriver, first_idx + a);
924
925 iounmap(brd->basemem);
926 brd->basemem = NULL;
927 kfree(brd->ports);
928}
929
930#ifdef CONFIG_PCI
931static int moxa_pci_probe(struct pci_dev *pdev,
932 const struct pci_device_id *ent)
933{
934 struct moxa_board_conf *board;
935 unsigned int i;
936 int board_type = ent->driver_data;
937 int retval;
938
939 retval = pci_enable_device(pdev);
940 if (retval) {
941 dev_err(&pdev->dev, "can't enable pci device\n");
942 goto err;
943 }
944
945 for (i = 0; i < MAX_BOARDS; i++)
946 if (moxa_boards[i].basemem == NULL)
947 break;
948
949 retval = -ENODEV;
950 if (i >= MAX_BOARDS) {
951 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
952 "found. Board is ignored.\n", MAX_BOARDS);
953 goto err;
954 }
955
956 board = &moxa_boards[i];
957
958 retval = pci_request_region(pdev, 2, "moxa-base");
959 if (retval) {
960 dev_err(&pdev->dev, "can't request pci region 2\n");
961 goto err;
962 }
963
964 board->basemem = ioremap(pci_resource_start(pdev, 2), 0x4000);
965 if (board->basemem == NULL) {
966 dev_err(&pdev->dev, "can't remap io space 2\n");
967 retval = -ENOMEM;
968 goto err_reg;
969 }
970
971 board->boardType = board_type;
972 switch (board_type) {
973 case MOXA_BOARD_C218_ISA:
974 case MOXA_BOARD_C218_PCI:
975 board->numPorts = 8;
976 break;
977
978 case MOXA_BOARD_CP204J:
979 board->numPorts = 4;
980 break;
981 default:
982 board->numPorts = 0;
983 break;
984 }
985 board->busType = MOXA_BUS_TYPE_PCI;
986
987 retval = moxa_init_board(board, &pdev->dev);
988 if (retval)
989 goto err_base;
990
991 pci_set_drvdata(pdev, board);
992
993 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
994 moxa_brdname[board_type - 1], board->numPorts);
995
996 return 0;
997err_base:
998 iounmap(board->basemem);
999 board->basemem = NULL;
1000err_reg:
1001 pci_release_region(pdev, 2);
1002err:
1003 return retval;
1004}
1005
1006static void moxa_pci_remove(struct pci_dev *pdev)
1007{
1008 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
1009
1010 moxa_board_deinit(brd);
1011
1012 pci_release_region(pdev, 2);
1013}
1014
1015static struct pci_driver moxa_pci_driver = {
1016 .name = "moxa",
1017 .id_table = moxa_pcibrds,
1018 .probe = moxa_pci_probe,
1019 .remove = moxa_pci_remove
1020};
1021#endif /* CONFIG_PCI */
1022
1023static int __init moxa_init(void)
1024{
1025 unsigned int isabrds = 0;
1026 int retval = 0;
1027 struct moxa_board_conf *brd = moxa_boards;
1028 unsigned int i;
1029
1030 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
1031 MOXA_VERSION);
1032
1033 tty_port_init(&moxa_service_port);
1034
1035 moxaDriver = tty_alloc_driver(MAX_PORTS + 1,
1036 TTY_DRIVER_REAL_RAW |
1037 TTY_DRIVER_DYNAMIC_DEV);
1038 if (IS_ERR(moxaDriver))
1039 return PTR_ERR(moxaDriver);
1040
1041 moxaDriver->name = "ttyMX";
1042 moxaDriver->major = ttymajor;
1043 moxaDriver->minor_start = 0;
1044 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
1045 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
1046 moxaDriver->init_termios = tty_std_termios;
1047 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
1048 moxaDriver->init_termios.c_ispeed = 9600;
1049 moxaDriver->init_termios.c_ospeed = 9600;
1050 tty_set_operations(moxaDriver, &moxa_ops);
1051 /* Having one more port only for ioctls is ugly */
1052 tty_port_link_device(&moxa_service_port, moxaDriver, MAX_PORTS);
1053
1054 if (tty_register_driver(moxaDriver)) {
1055 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
1056 put_tty_driver(moxaDriver);
1057 return -1;
1058 }
1059
1060 /* Find the boards defined from module args. */
1061
1062 for (i = 0; i < MAX_BOARDS; i++) {
1063 if (!baseaddr[i])
1064 break;
1065 if (type[i] == MOXA_BOARD_C218_ISA ||
1066 type[i] == MOXA_BOARD_C320_ISA) {
1067 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
1068 isabrds + 1, moxa_brdname[type[i] - 1],
1069 baseaddr[i]);
1070 brd->boardType = type[i];
1071 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
1072 numports[i];
1073 brd->busType = MOXA_BUS_TYPE_ISA;
1074 brd->basemem = ioremap(baseaddr[i], 0x4000);
1075 if (!brd->basemem) {
1076 printk(KERN_ERR "MOXA: can't remap %lx\n",
1077 baseaddr[i]);
1078 continue;
1079 }
1080 if (moxa_init_board(brd, NULL)) {
1081 iounmap(brd->basemem);
1082 brd->basemem = NULL;
1083 continue;
1084 }
1085
1086 printk(KERN_INFO "MOXA isa board found at 0x%.8lx and "
1087 "ready (%u ports, firmware loaded)\n",
1088 baseaddr[i], brd->numPorts);
1089
1090 brd++;
1091 isabrds++;
1092 }
1093 }
1094
1095#ifdef CONFIG_PCI
1096 retval = pci_register_driver(&moxa_pci_driver);
1097 if (retval) {
1098 printk(KERN_ERR "Can't register MOXA pci driver!\n");
1099 if (isabrds)
1100 retval = 0;
1101 }
1102#endif
1103
1104 return retval;
1105}
1106
1107static void __exit moxa_exit(void)
1108{
1109 unsigned int i;
1110
1111#ifdef CONFIG_PCI
1112 pci_unregister_driver(&moxa_pci_driver);
1113#endif
1114
1115 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
1116 if (moxa_boards[i].ready)
1117 moxa_board_deinit(&moxa_boards[i]);
1118
1119 del_timer_sync(&moxaTimer);
1120
1121 if (tty_unregister_driver(moxaDriver))
1122 printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
1123 "serial driver\n");
1124 put_tty_driver(moxaDriver);
1125}
1126
1127module_init(moxa_init);
1128module_exit(moxa_exit);
1129
1130static void moxa_shutdown(struct tty_port *port)
1131{
1132 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1133 MoxaPortDisable(ch);
1134 MoxaPortFlushData(ch, 2);
1135}
1136
1137static int moxa_carrier_raised(struct tty_port *port)
1138{
1139 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1140 int dcd;
1141
1142 spin_lock_irq(&port->lock);
1143 dcd = ch->DCDState;
1144 spin_unlock_irq(&port->lock);
1145 return dcd;
1146}
1147
1148static void moxa_dtr_rts(struct tty_port *port, int onoff)
1149{
1150 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1151 MoxaPortLineCtrl(ch, onoff, onoff);
1152}
1153
1154
1155static int moxa_open(struct tty_struct *tty, struct file *filp)
1156{
1157 struct moxa_board_conf *brd;
1158 struct moxa_port *ch;
1159 int port;
1160
1161 port = tty->index;
1162 if (port == MAX_PORTS) {
1163 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
1164 }
1165 if (mutex_lock_interruptible(&moxa_openlock))
1166 return -ERESTARTSYS;
1167 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
1168 if (!brd->ready) {
1169 mutex_unlock(&moxa_openlock);
1170 return -ENODEV;
1171 }
1172
1173 if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) {
1174 mutex_unlock(&moxa_openlock);
1175 return -ENODEV;
1176 }
1177
1178 ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
1179 ch->port.count++;
1180 tty->driver_data = ch;
1181 tty_port_tty_set(&ch->port, tty);
1182 mutex_lock(&ch->port.mutex);
1183 if (!tty_port_initialized(&ch->port)) {
1184 ch->statusflags = 0;
1185 moxa_set_tty_param(tty, &tty->termios);
1186 MoxaPortLineCtrl(ch, 1, 1);
1187 MoxaPortEnable(ch);
1188 MoxaSetFifo(ch, ch->type == PORT_16550A);
1189 tty_port_set_initialized(&ch->port, 1);
1190 }
1191 mutex_unlock(&ch->port.mutex);
1192 mutex_unlock(&moxa_openlock);
1193
1194 return tty_port_block_til_ready(&ch->port, tty, filp);
1195}
1196
1197static void moxa_close(struct tty_struct *tty, struct file *filp)
1198{
1199 struct moxa_port *ch = tty->driver_data;
1200 ch->cflag = tty->termios.c_cflag;
1201 tty_port_close(&ch->port, tty, filp);
1202}
1203
1204static int moxa_write(struct tty_struct *tty,
1205 const unsigned char *buf, int count)
1206{
1207 struct moxa_port *ch = tty->driver_data;
1208 unsigned long flags;
1209 int len;
1210
1211 if (ch == NULL)
1212 return 0;
1213
1214 spin_lock_irqsave(&moxa_lock, flags);
1215 len = MoxaPortWriteData(tty, buf, count);
1216 spin_unlock_irqrestore(&moxa_lock, flags);
1217
1218 set_bit(LOWWAIT, &ch->statusflags);
1219 return len;
1220}
1221
1222static int moxa_write_room(struct tty_struct *tty)
1223{
1224 struct moxa_port *ch;
1225
1226 if (tty->stopped)
1227 return 0;
1228 ch = tty->driver_data;
1229 if (ch == NULL)
1230 return 0;
1231 return MoxaPortTxFree(ch);
1232}
1233
1234static void moxa_flush_buffer(struct tty_struct *tty)
1235{
1236 struct moxa_port *ch = tty->driver_data;
1237
1238 if (ch == NULL)
1239 return;
1240 MoxaPortFlushData(ch, 1);
1241 tty_wakeup(tty);
1242}
1243
1244static int moxa_chars_in_buffer(struct tty_struct *tty)
1245{
1246 struct moxa_port *ch = tty->driver_data;
1247 int chars;
1248
1249 chars = MoxaPortTxQueue(ch);
1250 if (chars)
1251 /*
1252 * Make it possible to wakeup anything waiting for output
1253 * in tty_ioctl.c, etc.
1254 */
1255 set_bit(EMPTYWAIT, &ch->statusflags);
1256 return chars;
1257}
1258
1259static int moxa_tiocmget(struct tty_struct *tty)
1260{
1261 struct moxa_port *ch = tty->driver_data;
1262 int flag = 0, dtr, rts;
1263
1264 MoxaPortGetLineOut(ch, &dtr, &rts);
1265 if (dtr)
1266 flag |= TIOCM_DTR;
1267 if (rts)
1268 flag |= TIOCM_RTS;
1269 dtr = MoxaPortLineStatus(ch);
1270 if (dtr & 1)
1271 flag |= TIOCM_CTS;
1272 if (dtr & 2)
1273 flag |= TIOCM_DSR;
1274 if (dtr & 4)
1275 flag |= TIOCM_CD;
1276 return flag;
1277}
1278
1279static int moxa_tiocmset(struct tty_struct *tty,
1280 unsigned int set, unsigned int clear)
1281{
1282 struct moxa_port *ch;
1283 int dtr, rts;
1284
1285 mutex_lock(&moxa_openlock);
1286 ch = tty->driver_data;
1287 if (!ch) {
1288 mutex_unlock(&moxa_openlock);
1289 return -EINVAL;
1290 }
1291
1292 MoxaPortGetLineOut(ch, &dtr, &rts);
1293 if (set & TIOCM_RTS)
1294 rts = 1;
1295 if (set & TIOCM_DTR)
1296 dtr = 1;
1297 if (clear & TIOCM_RTS)
1298 rts = 0;
1299 if (clear & TIOCM_DTR)
1300 dtr = 0;
1301 MoxaPortLineCtrl(ch, dtr, rts);
1302 mutex_unlock(&moxa_openlock);
1303 return 0;
1304}
1305
1306static void moxa_set_termios(struct tty_struct *tty,
1307 struct ktermios *old_termios)
1308{
1309 struct moxa_port *ch = tty->driver_data;
1310
1311 if (ch == NULL)
1312 return;
1313 moxa_set_tty_param(tty, old_termios);
1314 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
1315 wake_up_interruptible(&ch->port.open_wait);
1316}
1317
1318static void moxa_stop(struct tty_struct *tty)
1319{
1320 struct moxa_port *ch = tty->driver_data;
1321
1322 if (ch == NULL)
1323 return;
1324 MoxaPortTxDisable(ch);
1325 set_bit(TXSTOPPED, &ch->statusflags);
1326}
1327
1328
1329static void moxa_start(struct tty_struct *tty)
1330{
1331 struct moxa_port *ch = tty->driver_data;
1332
1333 if (ch == NULL)
1334 return;
1335
1336 if (!test_bit(TXSTOPPED, &ch->statusflags))
1337 return;
1338
1339 MoxaPortTxEnable(ch);
1340 clear_bit(TXSTOPPED, &ch->statusflags);
1341}
1342
1343static void moxa_hangup(struct tty_struct *tty)
1344{
1345 struct moxa_port *ch = tty->driver_data;
1346 tty_port_hangup(&ch->port);
1347}
1348
1349static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
1350{
1351 unsigned long flags;
1352 dcd = !!dcd;
1353
1354 spin_lock_irqsave(&p->port.lock, flags);
1355 if (dcd != p->DCDState) {
1356 p->DCDState = dcd;
1357 spin_unlock_irqrestore(&p->port.lock, flags);
1358 if (!dcd)
1359 tty_port_tty_hangup(&p->port, true);
1360 }
1361 else
1362 spin_unlock_irqrestore(&p->port.lock, flags);
1363}
1364
1365static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
1366 u16 __iomem *ip)
1367{
1368 struct tty_struct *tty = tty_port_tty_get(&p->port);
1369 void __iomem *ofsAddr;
1370 unsigned int inited = tty_port_initialized(&p->port);
1371 u16 intr;
1372
1373 if (tty) {
1374 if (test_bit(EMPTYWAIT, &p->statusflags) &&
1375 MoxaPortTxQueue(p) == 0) {
1376 clear_bit(EMPTYWAIT, &p->statusflags);
1377 tty_wakeup(tty);
1378 }
1379 if (test_bit(LOWWAIT, &p->statusflags) && !tty->stopped &&
1380 MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
1381 clear_bit(LOWWAIT, &p->statusflags);
1382 tty_wakeup(tty);
1383 }
1384
1385 if (inited && !tty_throttled(tty) &&
1386 MoxaPortRxQueue(p) > 0) { /* RX */
1387 MoxaPortReadData(p);
1388 tty_schedule_flip(&p->port);
1389 }
1390 } else {
1391 clear_bit(EMPTYWAIT, &p->statusflags);
1392 MoxaPortFlushData(p, 0); /* flush RX */
1393 }
1394
1395 if (!handle) /* nothing else to do */
1396 goto put;
1397
1398 intr = readw(ip); /* port irq status */
1399 if (intr == 0)
1400 goto put;
1401
1402 writew(0, ip); /* ACK port */
1403 ofsAddr = p->tableAddr;
1404 if (intr & IntrTx) /* disable tx intr */
1405 writew(readw(ofsAddr + HostStat) & ~WakeupTx,
1406 ofsAddr + HostStat);
1407
1408 if (!inited)
1409 goto put;
1410
1411 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
1412 tty_insert_flip_char(&p->port, 0, TTY_BREAK);
1413 tty_schedule_flip(&p->port);
1414 }
1415
1416 if (intr & IntrLine)
1417 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
1418put:
1419 tty_kref_put(tty);
1420
1421 return 0;
1422}
1423
1424static void moxa_poll(struct timer_list *unused)
1425{
1426 struct moxa_board_conf *brd;
1427 u16 __iomem *ip;
1428 unsigned int card, port, served = 0;
1429
1430 spin_lock(&moxa_lock);
1431 for (card = 0; card < MAX_BOARDS; card++) {
1432 brd = &moxa_boards[card];
1433 if (!brd->ready)
1434 continue;
1435
1436 served++;
1437
1438 ip = NULL;
1439 if (readb(brd->intPend) == 0xff)
1440 ip = brd->intTable + readb(brd->intNdx);
1441
1442 for (port = 0; port < brd->numPorts; port++)
1443 moxa_poll_port(&brd->ports[port], !!ip, ip + port);
1444
1445 if (ip)
1446 writeb(0, brd->intPend); /* ACK */
1447
1448 if (moxaLowWaterChk) {
1449 struct moxa_port *p = brd->ports;
1450 for (port = 0; port < brd->numPorts; port++, p++)
1451 if (p->lowChkFlag) {
1452 p->lowChkFlag = 0;
1453 moxa_low_water_check(p->tableAddr);
1454 }
1455 }
1456 }
1457 moxaLowWaterChk = 0;
1458
1459 if (served)
1460 mod_timer(&moxaTimer, jiffies + HZ / 50);
1461 spin_unlock(&moxa_lock);
1462}
1463
1464/******************************************************************************/
1465
1466static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
1467{
1468 register struct ktermios *ts = &tty->termios;
1469 struct moxa_port *ch = tty->driver_data;
1470 int rts, cts, txflow, rxflow, xany, baud;
1471
1472 rts = cts = txflow = rxflow = xany = 0;
1473 if (ts->c_cflag & CRTSCTS)
1474 rts = cts = 1;
1475 if (ts->c_iflag & IXON)
1476 txflow = 1;
1477 if (ts->c_iflag & IXOFF)
1478 rxflow = 1;
1479 if (ts->c_iflag & IXANY)
1480 xany = 1;
1481
1482 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1483 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
1484 if (baud == -1)
1485 baud = tty_termios_baud_rate(old_termios);
1486 /* Not put the baud rate into the termios data */
1487 tty_encode_baud_rate(tty, baud, baud);
1488}
1489
1490/*****************************************************************************
1491 * Driver level functions: *
1492 *****************************************************************************/
1493
1494static void MoxaPortFlushData(struct moxa_port *port, int mode)
1495{
1496 void __iomem *ofsAddr;
1497 if (mode < 0 || mode > 2)
1498 return;
1499 ofsAddr = port->tableAddr;
1500 moxafunc(ofsAddr, FC_FlushQueue, mode);
1501 if (mode != 1) {
1502 port->lowChkFlag = 0;
1503 moxa_low_water_check(ofsAddr);
1504 }
1505}
1506
1507/*
1508 * Moxa Port Number Description:
1509 *
1510 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1511 * the port number using in MOXA driver functions will be 0 to 31 for
1512 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1513 * to 127 for fourth. For example, if you setup three MOXA boards,
1514 * first board is C218, second board is C320-16 and third board is
1515 * C320-32. The port number of first board (C218 - 8 ports) is from
1516 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1517 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1518 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1519 * 127 will be invalid.
1520 *
1521 *
1522 * Moxa Functions Description:
1523 *
1524 * Function 1: Driver initialization routine, this routine must be
1525 * called when initialized driver.
1526 * Syntax:
1527 * void MoxaDriverInit();
1528 *
1529 *
1530 * Function 2: Moxa driver private IOCTL command processing.
1531 * Syntax:
1532 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1533 *
1534 * unsigned int cmd : IOCTL command
1535 * unsigned long arg : IOCTL argument
1536 * int port : port number (0 - 127)
1537 *
1538 * return: 0 (OK)
1539 * -EINVAL
1540 * -ENOIOCTLCMD
1541 *
1542 *
1543 * Function 6: Enable this port to start Tx/Rx data.
1544 * Syntax:
1545 * void MoxaPortEnable(int port);
1546 * int port : port number (0 - 127)
1547 *
1548 *
1549 * Function 7: Disable this port
1550 * Syntax:
1551 * void MoxaPortDisable(int port);
1552 * int port : port number (0 - 127)
1553 *
1554 *
1555 * Function 10: Setting baud rate of this port.
1556 * Syntax:
1557 * speed_t MoxaPortSetBaud(int port, speed_t baud);
1558 * int port : port number (0 - 127)
1559 * long baud : baud rate (50 - 115200)
1560 *
1561 * return: 0 : this port is invalid or baud < 50
1562 * 50 - 115200 : the real baud rate set to the port, if
1563 * the argument baud is large than maximun
1564 * available baud rate, the real setting
1565 * baud rate will be the maximun baud rate.
1566 *
1567 *
1568 * Function 12: Configure the port.
1569 * Syntax:
1570 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1571 * int port : port number (0 - 127)
1572 * struct ktermios * termio : termio structure pointer
1573 * speed_t baud : baud rate
1574 *
1575 * return: -1 : this port is invalid or termio == NULL
1576 * 0 : setting O.K.
1577 *
1578 *
1579 * Function 13: Get the DTR/RTS state of this port.
1580 * Syntax:
1581 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1582 * int port : port number (0 - 127)
1583 * int * dtrState : pointer to INT to receive the current DTR
1584 * state. (if NULL, this function will not
1585 * write to this address)
1586 * int * rtsState : pointer to INT to receive the current RTS
1587 * state. (if NULL, this function will not
1588 * write to this address)
1589 *
1590 * return: -1 : this port is invalid
1591 * 0 : O.K.
1592 *
1593 *
1594 * Function 14: Setting the DTR/RTS output state of this port.
1595 * Syntax:
1596 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1597 * int port : port number (0 - 127)
1598 * int dtrState : DTR output state (0: off, 1: on)
1599 * int rtsState : RTS output state (0: off, 1: on)
1600 *
1601 *
1602 * Function 15: Setting the flow control of this port.
1603 * Syntax:
1604 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1605 * int txFlow,int xany);
1606 * int port : port number (0 - 127)
1607 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1608 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1609 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1610 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1611 * int xany : S/W XANY flow control (0: no, 1: yes)
1612 *
1613 *
1614 * Function 16: Get ths line status of this port
1615 * Syntax:
1616 * int MoxaPortLineStatus(int port);
1617 * int port : port number (0 - 127)
1618 *
1619 * return: Bit 0 - CTS state (0: off, 1: on)
1620 * Bit 1 - DSR state (0: off, 1: on)
1621 * Bit 2 - DCD state (0: off, 1: on)
1622 *
1623 *
1624 * Function 19: Flush the Rx/Tx buffer data of this port.
1625 * Syntax:
1626 * void MoxaPortFlushData(int port, int mode);
1627 * int port : port number (0 - 127)
1628 * int mode
1629 * 0 : flush the Rx buffer
1630 * 1 : flush the Tx buffer
1631 * 2 : flush the Rx and Tx buffer
1632 *
1633 *
1634 * Function 20: Write data.
1635 * Syntax:
1636 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1637 * int port : port number (0 - 127)
1638 * unsigned char * buffer : pointer to write data buffer.
1639 * int length : write data length
1640 *
1641 * return: 0 - length : real write data length
1642 *
1643 *
1644 * Function 21: Read data.
1645 * Syntax:
1646 * int MoxaPortReadData(int port, struct tty_struct *tty);
1647 * int port : port number (0 - 127)
1648 * struct tty_struct *tty : tty for data
1649 *
1650 * return: 0 - length : real read data length
1651 *
1652 *
1653 * Function 24: Get the Tx buffer current queued data bytes
1654 * Syntax:
1655 * int MoxaPortTxQueue(int port);
1656 * int port : port number (0 - 127)
1657 *
1658 * return: .. : Tx buffer current queued data bytes
1659 *
1660 *
1661 * Function 25: Get the Tx buffer current free space
1662 * Syntax:
1663 * int MoxaPortTxFree(int port);
1664 * int port : port number (0 - 127)
1665 *
1666 * return: .. : Tx buffer current free space
1667 *
1668 *
1669 * Function 26: Get the Rx buffer current queued data bytes
1670 * Syntax:
1671 * int MoxaPortRxQueue(int port);
1672 * int port : port number (0 - 127)
1673 *
1674 * return: .. : Rx buffer current queued data bytes
1675 *
1676 *
1677 * Function 28: Disable port data transmission.
1678 * Syntax:
1679 * void MoxaPortTxDisable(int port);
1680 * int port : port number (0 - 127)
1681 *
1682 *
1683 * Function 29: Enable port data transmission.
1684 * Syntax:
1685 * void MoxaPortTxEnable(int port);
1686 * int port : port number (0 - 127)
1687 *
1688 *
1689 * Function 31: Get the received BREAK signal count and reset it.
1690 * Syntax:
1691 * int MoxaPortResetBrkCnt(int port);
1692 * int port : port number (0 - 127)
1693 *
1694 * return: 0 - .. : BREAK signal count
1695 *
1696 *
1697 */
1698
1699static void MoxaPortEnable(struct moxa_port *port)
1700{
1701 void __iomem *ofsAddr;
1702 u16 lowwater = 512;
1703
1704 ofsAddr = port->tableAddr;
1705 writew(lowwater, ofsAddr + Low_water);
1706 if (MOXA_IS_320(port->board))
1707 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
1708 else
1709 writew(readw(ofsAddr + HostStat) | WakeupBreak,
1710 ofsAddr + HostStat);
1711
1712 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
1713 moxafunc(ofsAddr, FC_FlushQueue, 2);
1714
1715 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
1716 MoxaPortLineStatus(port);
1717}
1718
1719static void MoxaPortDisable(struct moxa_port *port)
1720{
1721 void __iomem *ofsAddr = port->tableAddr;
1722
1723 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
1724 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
1725 writew(0, ofsAddr + HostStat);
1726 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
1727}
1728
1729static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
1730{
1731 void __iomem *ofsAddr = port->tableAddr;
1732 unsigned int clock, val;
1733 speed_t max;
1734
1735 max = MOXA_IS_320(port->board) ? 460800 : 921600;
1736 if (baud < 50)
1737 return 0;
1738 if (baud > max)
1739 baud = max;
1740 clock = 921600;
1741 val = clock / baud;
1742 moxafunc(ofsAddr, FC_SetBaud, val);
1743 baud = clock / val;
1744 return baud;
1745}
1746
1747static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
1748 speed_t baud)
1749{
1750 void __iomem *ofsAddr;
1751 tcflag_t mode = 0;
1752
1753 ofsAddr = port->tableAddr;
1754
1755 mode = termio->c_cflag & CSIZE;
1756 if (mode == CS5)
1757 mode = MX_CS5;
1758 else if (mode == CS6)
1759 mode = MX_CS6;
1760 else if (mode == CS7)
1761 mode = MX_CS7;
1762 else if (mode == CS8)
1763 mode = MX_CS8;
1764
1765 if (termio->c_cflag & CSTOPB) {
1766 if (mode == MX_CS5)
1767 mode |= MX_STOP15;
1768 else
1769 mode |= MX_STOP2;
1770 } else
1771 mode |= MX_STOP1;
1772
1773 if (termio->c_cflag & PARENB) {
1774 if (termio->c_cflag & PARODD) {
1775 if (termio->c_cflag & CMSPAR)
1776 mode |= MX_PARMARK;
1777 else
1778 mode |= MX_PARODD;
1779 } else {
1780 if (termio->c_cflag & CMSPAR)
1781 mode |= MX_PARSPACE;
1782 else
1783 mode |= MX_PAREVEN;
1784 }
1785 } else
1786 mode |= MX_PARNONE;
1787
1788 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
1789
1790 if (MOXA_IS_320(port->board) && baud >= 921600)
1791 return -1;
1792
1793 baud = MoxaPortSetBaud(port, baud);
1794
1795 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
1796 spin_lock_irq(&moxafunc_lock);
1797 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
1798 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
1799 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
1800 moxa_wait_finish(ofsAddr);
1801 spin_unlock_irq(&moxafunc_lock);
1802
1803 }
1804 return baud;
1805}
1806
1807static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
1808 int *rtsState)
1809{
1810 if (dtrState)
1811 *dtrState = !!(port->lineCtrl & DTR_ON);
1812 if (rtsState)
1813 *rtsState = !!(port->lineCtrl & RTS_ON);
1814
1815 return 0;
1816}
1817
1818static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
1819{
1820 u8 mode = 0;
1821
1822 if (dtr)
1823 mode |= DTR_ON;
1824 if (rts)
1825 mode |= RTS_ON;
1826 port->lineCtrl = mode;
1827 moxafunc(port->tableAddr, FC_LineControl, mode);
1828}
1829
1830static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
1831 int txflow, int rxflow, int txany)
1832{
1833 int mode = 0;
1834
1835 if (rts)
1836 mode |= RTS_FlowCtl;
1837 if (cts)
1838 mode |= CTS_FlowCtl;
1839 if (txflow)
1840 mode |= Tx_FlowCtl;
1841 if (rxflow)
1842 mode |= Rx_FlowCtl;
1843 if (txany)
1844 mode |= IXM_IXANY;
1845 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
1846}
1847
1848static int MoxaPortLineStatus(struct moxa_port *port)
1849{
1850 void __iomem *ofsAddr;
1851 int val;
1852
1853 ofsAddr = port->tableAddr;
1854 if (MOXA_IS_320(port->board))
1855 val = moxafuncret(ofsAddr, FC_LineStatus, 0);
1856 else
1857 val = readw(ofsAddr + FlagStat) >> 4;
1858 val &= 0x0B;
1859 if (val & 8)
1860 val |= 4;
1861 moxa_new_dcdstate(port, val & 8);
1862 val &= 7;
1863 return val;
1864}
1865
1866static int MoxaPortWriteData(struct tty_struct *tty,
1867 const unsigned char *buffer, int len)
1868{
1869 struct moxa_port *port = tty->driver_data;
1870 void __iomem *baseAddr, *ofsAddr, *ofs;
1871 unsigned int c, total;
1872 u16 head, tail, tx_mask, spage, epage;
1873 u16 pageno, pageofs, bufhead;
1874
1875 ofsAddr = port->tableAddr;
1876 baseAddr = port->board->basemem;
1877 tx_mask = readw(ofsAddr + TX_mask);
1878 spage = readw(ofsAddr + Page_txb);
1879 epage = readw(ofsAddr + EndPage_txb);
1880 tail = readw(ofsAddr + TXwptr);
1881 head = readw(ofsAddr + TXrptr);
1882 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
1883 if (c > len)
1884 c = len;
1885 moxaLog.txcnt[port->port.tty->index] += c;
1886 total = c;
1887 if (spage == epage) {
1888 bufhead = readw(ofsAddr + Ofs_txb);
1889 writew(spage, baseAddr + Control_reg);
1890 while (c > 0) {
1891 if (head > tail)
1892 len = head - tail - 1;
1893 else
1894 len = tx_mask + 1 - tail;
1895 len = (c > len) ? len : c;
1896 ofs = baseAddr + DynPage_addr + bufhead + tail;
1897 memcpy_toio(ofs, buffer, len);
1898 buffer += len;
1899 tail = (tail + len) & tx_mask;
1900 c -= len;
1901 }
1902 } else {
1903 pageno = spage + (tail >> 13);
1904 pageofs = tail & Page_mask;
1905 while (c > 0) {
1906 len = Page_size - pageofs;
1907 if (len > c)
1908 len = c;
1909 writeb(pageno, baseAddr + Control_reg);
1910 ofs = baseAddr + DynPage_addr + pageofs;
1911 memcpy_toio(ofs, buffer, len);
1912 buffer += len;
1913 if (++pageno == epage)
1914 pageno = spage;
1915 pageofs = 0;
1916 c -= len;
1917 }
1918 tail = (tail + total) & tx_mask;
1919 }
1920 writew(tail, ofsAddr + TXwptr);
1921 writeb(1, ofsAddr + CD180TXirq); /* start to send */
1922 return total;
1923}
1924
1925static int MoxaPortReadData(struct moxa_port *port)
1926{
1927 struct tty_struct *tty = port->port.tty;
1928 unsigned char *dst;
1929 void __iomem *baseAddr, *ofsAddr, *ofs;
1930 unsigned int count, len, total;
1931 u16 tail, rx_mask, spage, epage;
1932 u16 pageno, pageofs, bufhead, head;
1933
1934 ofsAddr = port->tableAddr;
1935 baseAddr = port->board->basemem;
1936 head = readw(ofsAddr + RXrptr);
1937 tail = readw(ofsAddr + RXwptr);
1938 rx_mask = readw(ofsAddr + RX_mask);
1939 spage = readw(ofsAddr + Page_rxb);
1940 epage = readw(ofsAddr + EndPage_rxb);
1941 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
1942 if (count == 0)
1943 return 0;
1944
1945 total = count;
1946 moxaLog.rxcnt[tty->index] += total;
1947 if (spage == epage) {
1948 bufhead = readw(ofsAddr + Ofs_rxb);
1949 writew(spage, baseAddr + Control_reg);
1950 while (count > 0) {
1951 ofs = baseAddr + DynPage_addr + bufhead + head;
1952 len = (tail >= head) ? (tail - head) :
1953 (rx_mask + 1 - head);
1954 len = tty_prepare_flip_string(&port->port, &dst,
1955 min(len, count));
1956 memcpy_fromio(dst, ofs, len);
1957 head = (head + len) & rx_mask;
1958 count -= len;
1959 }
1960 } else {
1961 pageno = spage + (head >> 13);
1962 pageofs = head & Page_mask;
1963 while (count > 0) {
1964 writew(pageno, baseAddr + Control_reg);
1965 ofs = baseAddr + DynPage_addr + pageofs;
1966 len = tty_prepare_flip_string(&port->port, &dst,
1967 min(Page_size - pageofs, count));
1968 memcpy_fromio(dst, ofs, len);
1969
1970 count -= len;
1971 pageofs = (pageofs + len) & Page_mask;
1972 if (pageofs == 0 && ++pageno == epage)
1973 pageno = spage;
1974 }
1975 head = (head + total) & rx_mask;
1976 }
1977 writew(head, ofsAddr + RXrptr);
1978 if (readb(ofsAddr + FlagStat) & Xoff_state) {
1979 moxaLowWaterChk = 1;
1980 port->lowChkFlag = 1;
1981 }
1982 return total;
1983}
1984
1985
1986static int MoxaPortTxQueue(struct moxa_port *port)
1987{
1988 void __iomem *ofsAddr = port->tableAddr;
1989 u16 rptr, wptr, mask;
1990
1991 rptr = readw(ofsAddr + TXrptr);
1992 wptr = readw(ofsAddr + TXwptr);
1993 mask = readw(ofsAddr + TX_mask);
1994 return (wptr - rptr) & mask;
1995}
1996
1997static int MoxaPortTxFree(struct moxa_port *port)
1998{
1999 void __iomem *ofsAddr = port->tableAddr;
2000 u16 rptr, wptr, mask;
2001
2002 rptr = readw(ofsAddr + TXrptr);
2003 wptr = readw(ofsAddr + TXwptr);
2004 mask = readw(ofsAddr + TX_mask);
2005 return mask - ((wptr - rptr) & mask);
2006}
2007
2008static int MoxaPortRxQueue(struct moxa_port *port)
2009{
2010 void __iomem *ofsAddr = port->tableAddr;
2011 u16 rptr, wptr, mask;
2012
2013 rptr = readw(ofsAddr + RXrptr);
2014 wptr = readw(ofsAddr + RXwptr);
2015 mask = readw(ofsAddr + RX_mask);
2016 return (wptr - rptr) & mask;
2017}
2018
2019static void MoxaPortTxDisable(struct moxa_port *port)
2020{
2021 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
2022}
2023
2024static void MoxaPortTxEnable(struct moxa_port *port)
2025{
2026 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
2027}
2028
2029static int moxa_get_serial_info(struct tty_struct *tty,
2030 struct serial_struct *ss)
2031{
2032 struct moxa_port *info = tty->driver_data;
2033
2034 if (tty->index == MAX_PORTS)
2035 return -EINVAL;
2036 if (!info)
2037 return -ENODEV;
2038 mutex_lock(&info->port.mutex);
2039 ss->type = info->type,
2040 ss->line = info->port.tty->index,
2041 ss->flags = info->port.flags,
2042 ss->baud_base = 921600,
2043 ss->close_delay = info->port.close_delay;
2044 mutex_unlock(&info->port.mutex);
2045 return 0;
2046}
2047
2048
2049static int moxa_set_serial_info(struct tty_struct *tty,
2050 struct serial_struct *ss)
2051{
2052 struct moxa_port *info = tty->driver_data;
2053
2054 if (tty->index == MAX_PORTS)
2055 return -EINVAL;
2056 if (!info)
2057 return -ENODEV;
2058
2059 if (ss->irq != 0 || ss->port != 0 ||
2060 ss->custom_divisor != 0 ||
2061 ss->baud_base != 921600)
2062 return -EPERM;
2063
2064 mutex_lock(&info->port.mutex);
2065 if (!capable(CAP_SYS_ADMIN)) {
2066 if (((ss->flags & ~ASYNC_USR_MASK) !=
2067 (info->port.flags & ~ASYNC_USR_MASK))) {
2068 mutex_unlock(&info->port.mutex);
2069 return -EPERM;
2070 }
2071 }
2072 info->port.close_delay = ss->close_delay * HZ / 100;
2073
2074 MoxaSetFifo(info, ss->type == PORT_16550A);
2075
2076 info->type = ss->type;
2077 mutex_unlock(&info->port.mutex);
2078 return 0;
2079}
2080
2081
2082
2083/*****************************************************************************
2084 * Static local functions: *
2085 *****************************************************************************/
2086
2087static void MoxaSetFifo(struct moxa_port *port, int enable)
2088{
2089 void __iomem *ofsAddr = port->tableAddr;
2090
2091 if (!enable) {
2092 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2093 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2094 } else {
2095 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2096 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
2097 }
2098}
1/*****************************************************************************/
2/*
3 * moxa.c -- MOXA Intellio family multiport serial driver.
4 *
5 * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com).
6 * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
7 *
8 * This code is loosely based on the Linux serial driver, written by
9 * Linus Torvalds, Theodore T'so and 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
17/*
18 * MOXA Intellio Series Driver
19 * for : LINUX
20 * date : 1999/1/7
21 * version : 5.1
22 */
23
24#include <linux/module.h>
25#include <linux/types.h>
26#include <linux/mm.h>
27#include <linux/ioport.h>
28#include <linux/errno.h>
29#include <linux/firmware.h>
30#include <linux/signal.h>
31#include <linux/sched.h>
32#include <linux/timer.h>
33#include <linux/interrupt.h>
34#include <linux/tty.h>
35#include <linux/tty_flip.h>
36#include <linux/major.h>
37#include <linux/string.h>
38#include <linux/fcntl.h>
39#include <linux/ptrace.h>
40#include <linux/serial.h>
41#include <linux/tty_driver.h>
42#include <linux/delay.h>
43#include <linux/pci.h>
44#include <linux/init.h>
45#include <linux/bitops.h>
46#include <linux/slab.h>
47#include <linux/ratelimit.h>
48
49#include <asm/io.h>
50#include <asm/uaccess.h>
51
52#include "moxa.h"
53
54#define MOXA_VERSION "6.0k"
55
56#define MOXA_FW_HDRLEN 32
57
58#define MOXAMAJOR 172
59
60#define MAX_BOARDS 4 /* Don't change this value */
61#define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
62#define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
63
64#define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \
65 (brd)->boardType == MOXA_BOARD_C320_PCI)
66
67/*
68 * Define the Moxa PCI vendor and device IDs.
69 */
70#define MOXA_BUS_TYPE_ISA 0
71#define MOXA_BUS_TYPE_PCI 1
72
73enum {
74 MOXA_BOARD_C218_PCI = 1,
75 MOXA_BOARD_C218_ISA,
76 MOXA_BOARD_C320_PCI,
77 MOXA_BOARD_C320_ISA,
78 MOXA_BOARD_CP204J,
79};
80
81static char *moxa_brdname[] =
82{
83 "C218 Turbo PCI series",
84 "C218 Turbo ISA series",
85 "C320 Turbo PCI series",
86 "C320 Turbo ISA series",
87 "CP-204J series",
88};
89
90#ifdef CONFIG_PCI
91static struct pci_device_id moxa_pcibrds[] = {
92 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218),
93 .driver_data = MOXA_BOARD_C218_PCI },
94 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320),
95 .driver_data = MOXA_BOARD_C320_PCI },
96 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J),
97 .driver_data = MOXA_BOARD_CP204J },
98 { 0 }
99};
100MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
101#endif /* CONFIG_PCI */
102
103struct moxa_port;
104
105static struct moxa_board_conf {
106 int boardType;
107 int numPorts;
108 int busType;
109
110 unsigned int ready;
111
112 struct moxa_port *ports;
113
114 void __iomem *basemem;
115 void __iomem *intNdx;
116 void __iomem *intPend;
117 void __iomem *intTable;
118} moxa_boards[MAX_BOARDS];
119
120struct mxser_mstatus {
121 tcflag_t cflag;
122 int cts;
123 int dsr;
124 int ri;
125 int dcd;
126};
127
128struct moxaq_str {
129 int inq;
130 int outq;
131};
132
133struct moxa_port {
134 struct tty_port port;
135 struct moxa_board_conf *board;
136 void __iomem *tableAddr;
137
138 int type;
139 int cflag;
140 unsigned long statusflags;
141
142 u8 DCDState; /* Protected by the port lock */
143 u8 lineCtrl;
144 u8 lowChkFlag;
145};
146
147struct mon_str {
148 int tick;
149 int rxcnt[MAX_PORTS];
150 int txcnt[MAX_PORTS];
151};
152
153/* statusflags */
154#define TXSTOPPED 1
155#define LOWWAIT 2
156#define EMPTYWAIT 3
157
158#define SERIAL_DO_RESTART
159
160#define WAKEUP_CHARS 256
161
162static int ttymajor = MOXAMAJOR;
163static struct mon_str moxaLog;
164static unsigned int moxaFuncTout = HZ / 2;
165static unsigned int moxaLowWaterChk;
166static DEFINE_MUTEX(moxa_openlock);
167static DEFINE_SPINLOCK(moxa_lock);
168
169static unsigned long baseaddr[MAX_BOARDS];
170static unsigned int type[MAX_BOARDS];
171static unsigned int numports[MAX_BOARDS];
172
173MODULE_AUTHOR("William Chen");
174MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
175MODULE_LICENSE("GPL");
176MODULE_FIRMWARE("c218tunx.cod");
177MODULE_FIRMWARE("cp204unx.cod");
178MODULE_FIRMWARE("c320tunx.cod");
179
180module_param_array(type, uint, NULL, 0);
181MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
182module_param_array(baseaddr, ulong, NULL, 0);
183MODULE_PARM_DESC(baseaddr, "base address");
184module_param_array(numports, uint, NULL, 0);
185MODULE_PARM_DESC(numports, "numports (ignored for C218)");
186
187module_param(ttymajor, int, 0);
188
189/*
190 * static functions:
191 */
192static int moxa_open(struct tty_struct *, struct file *);
193static void moxa_close(struct tty_struct *, struct file *);
194static int moxa_write(struct tty_struct *, const unsigned char *, int);
195static int moxa_write_room(struct tty_struct *);
196static void moxa_flush_buffer(struct tty_struct *);
197static int moxa_chars_in_buffer(struct tty_struct *);
198static void moxa_set_termios(struct tty_struct *, struct ktermios *);
199static void moxa_stop(struct tty_struct *);
200static void moxa_start(struct tty_struct *);
201static void moxa_hangup(struct tty_struct *);
202static int moxa_tiocmget(struct tty_struct *tty);
203static int moxa_tiocmset(struct tty_struct *tty,
204 unsigned int set, unsigned int clear);
205static void moxa_poll(unsigned long);
206static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
207static void moxa_shutdown(struct tty_port *);
208static int moxa_carrier_raised(struct tty_port *);
209static void moxa_dtr_rts(struct tty_port *, int);
210/*
211 * moxa board interface functions:
212 */
213static void MoxaPortEnable(struct moxa_port *);
214static void MoxaPortDisable(struct moxa_port *);
215static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
216static int MoxaPortGetLineOut(struct moxa_port *, int *, int *);
217static void MoxaPortLineCtrl(struct moxa_port *, int, int);
218static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
219static int MoxaPortLineStatus(struct moxa_port *);
220static void MoxaPortFlushData(struct moxa_port *, int);
221static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int);
222static int MoxaPortReadData(struct moxa_port *);
223static int MoxaPortTxQueue(struct moxa_port *);
224static int MoxaPortRxQueue(struct moxa_port *);
225static int MoxaPortTxFree(struct moxa_port *);
226static void MoxaPortTxDisable(struct moxa_port *);
227static void MoxaPortTxEnable(struct moxa_port *);
228static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *);
229static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *);
230static void MoxaSetFifo(struct moxa_port *port, int enable);
231
232/*
233 * I/O functions
234 */
235
236static DEFINE_SPINLOCK(moxafunc_lock);
237
238static void moxa_wait_finish(void __iomem *ofsAddr)
239{
240 unsigned long end = jiffies + moxaFuncTout;
241
242 while (readw(ofsAddr + FuncCode) != 0)
243 if (time_after(jiffies, end))
244 return;
245 if (readw(ofsAddr + FuncCode) != 0)
246 printk_ratelimited(KERN_WARNING "moxa function expired\n");
247}
248
249static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
250{
251 unsigned long flags;
252 spin_lock_irqsave(&moxafunc_lock, flags);
253 writew(arg, ofsAddr + FuncArg);
254 writew(cmd, ofsAddr + FuncCode);
255 moxa_wait_finish(ofsAddr);
256 spin_unlock_irqrestore(&moxafunc_lock, flags);
257}
258
259static int moxafuncret(void __iomem *ofsAddr, u16 cmd, u16 arg)
260{
261 unsigned long flags;
262 u16 ret;
263 spin_lock_irqsave(&moxafunc_lock, flags);
264 writew(arg, ofsAddr + FuncArg);
265 writew(cmd, ofsAddr + FuncCode);
266 moxa_wait_finish(ofsAddr);
267 ret = readw(ofsAddr + FuncArg);
268 spin_unlock_irqrestore(&moxafunc_lock, flags);
269 return ret;
270}
271
272static void moxa_low_water_check(void __iomem *ofsAddr)
273{
274 u16 rptr, wptr, mask, len;
275
276 if (readb(ofsAddr + FlagStat) & Xoff_state) {
277 rptr = readw(ofsAddr + RXrptr);
278 wptr = readw(ofsAddr + RXwptr);
279 mask = readw(ofsAddr + RX_mask);
280 len = (wptr - rptr) & mask;
281 if (len <= Low_water)
282 moxafunc(ofsAddr, FC_SendXon, 0);
283 }
284}
285
286/*
287 * TTY operations
288 */
289
290static int moxa_ioctl(struct tty_struct *tty,
291 unsigned int cmd, unsigned long arg)
292{
293 struct moxa_port *ch = tty->driver_data;
294 void __user *argp = (void __user *)arg;
295 int status, ret = 0;
296
297 if (tty->index == MAX_PORTS) {
298 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
299 cmd != MOXA_GETMSTATUS)
300 return -EINVAL;
301 } else if (!ch)
302 return -ENODEV;
303
304 switch (cmd) {
305 case MOXA_GETDATACOUNT:
306 moxaLog.tick = jiffies;
307 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
308 ret = -EFAULT;
309 break;
310 case MOXA_FLUSH_QUEUE:
311 MoxaPortFlushData(ch, arg);
312 break;
313 case MOXA_GET_IOQUEUE: {
314 struct moxaq_str __user *argm = argp;
315 struct moxaq_str tmp;
316 struct moxa_port *p;
317 unsigned int i, j;
318
319 for (i = 0; i < MAX_BOARDS; i++) {
320 p = moxa_boards[i].ports;
321 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
322 memset(&tmp, 0, sizeof(tmp));
323 spin_lock_bh(&moxa_lock);
324 if (moxa_boards[i].ready) {
325 tmp.inq = MoxaPortRxQueue(p);
326 tmp.outq = MoxaPortTxQueue(p);
327 }
328 spin_unlock_bh(&moxa_lock);
329 if (copy_to_user(argm, &tmp, sizeof(tmp)))
330 return -EFAULT;
331 }
332 }
333 break;
334 } case MOXA_GET_OQUEUE:
335 status = MoxaPortTxQueue(ch);
336 ret = put_user(status, (unsigned long __user *)argp);
337 break;
338 case MOXA_GET_IQUEUE:
339 status = MoxaPortRxQueue(ch);
340 ret = put_user(status, (unsigned long __user *)argp);
341 break;
342 case MOXA_GETMSTATUS: {
343 struct mxser_mstatus __user *argm = argp;
344 struct mxser_mstatus tmp;
345 struct moxa_port *p;
346 unsigned int i, j;
347
348 for (i = 0; i < MAX_BOARDS; i++) {
349 p = moxa_boards[i].ports;
350 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
351 struct tty_struct *ttyp;
352 memset(&tmp, 0, sizeof(tmp));
353 spin_lock_bh(&moxa_lock);
354 if (!moxa_boards[i].ready) {
355 spin_unlock_bh(&moxa_lock);
356 goto copy;
357 }
358
359 status = MoxaPortLineStatus(p);
360 spin_unlock_bh(&moxa_lock);
361
362 if (status & 1)
363 tmp.cts = 1;
364 if (status & 2)
365 tmp.dsr = 1;
366 if (status & 4)
367 tmp.dcd = 1;
368
369 ttyp = tty_port_tty_get(&p->port);
370 if (!ttyp || !ttyp->termios)
371 tmp.cflag = p->cflag;
372 else
373 tmp.cflag = ttyp->termios->c_cflag;
374 tty_kref_put(ttyp);
375copy:
376 if (copy_to_user(argm, &tmp, sizeof(tmp)))
377 return -EFAULT;
378 }
379 }
380 break;
381 }
382 case TIOCGSERIAL:
383 mutex_lock(&ch->port.mutex);
384 ret = moxa_get_serial_info(ch, argp);
385 mutex_unlock(&ch->port.mutex);
386 break;
387 case TIOCSSERIAL:
388 mutex_lock(&ch->port.mutex);
389 ret = moxa_set_serial_info(ch, argp);
390 mutex_unlock(&ch->port.mutex);
391 break;
392 default:
393 ret = -ENOIOCTLCMD;
394 }
395 return ret;
396}
397
398static int moxa_break_ctl(struct tty_struct *tty, int state)
399{
400 struct moxa_port *port = tty->driver_data;
401
402 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
403 Magic_code);
404 return 0;
405}
406
407static const struct tty_operations moxa_ops = {
408 .open = moxa_open,
409 .close = moxa_close,
410 .write = moxa_write,
411 .write_room = moxa_write_room,
412 .flush_buffer = moxa_flush_buffer,
413 .chars_in_buffer = moxa_chars_in_buffer,
414 .ioctl = moxa_ioctl,
415 .set_termios = moxa_set_termios,
416 .stop = moxa_stop,
417 .start = moxa_start,
418 .hangup = moxa_hangup,
419 .break_ctl = moxa_break_ctl,
420 .tiocmget = moxa_tiocmget,
421 .tiocmset = moxa_tiocmset,
422};
423
424static const struct tty_port_operations moxa_port_ops = {
425 .carrier_raised = moxa_carrier_raised,
426 .dtr_rts = moxa_dtr_rts,
427 .shutdown = moxa_shutdown,
428};
429
430static struct tty_driver *moxaDriver;
431static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
432
433/*
434 * HW init
435 */
436
437static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
438{
439 switch (brd->boardType) {
440 case MOXA_BOARD_C218_ISA:
441 case MOXA_BOARD_C218_PCI:
442 if (model != 1)
443 goto err;
444 break;
445 case MOXA_BOARD_CP204J:
446 if (model != 3)
447 goto err;
448 break;
449 default:
450 if (model != 2)
451 goto err;
452 break;
453 }
454 return 0;
455err:
456 return -EINVAL;
457}
458
459static int moxa_check_fw(const void *ptr)
460{
461 const __le16 *lptr = ptr;
462
463 if (*lptr != cpu_to_le16(0x7980))
464 return -EINVAL;
465
466 return 0;
467}
468
469static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
470 size_t len)
471{
472 void __iomem *baseAddr = brd->basemem;
473 u16 tmp;
474
475 writeb(HW_reset, baseAddr + Control_reg); /* reset */
476 msleep(10);
477 memset_io(baseAddr, 0, 4096);
478 memcpy_toio(baseAddr, buf, len); /* download BIOS */
479 writeb(0, baseAddr + Control_reg); /* restart */
480
481 msleep(2000);
482
483 switch (brd->boardType) {
484 case MOXA_BOARD_C218_ISA:
485 case MOXA_BOARD_C218_PCI:
486 tmp = readw(baseAddr + C218_key);
487 if (tmp != C218_KeyCode)
488 goto err;
489 break;
490 case MOXA_BOARD_CP204J:
491 tmp = readw(baseAddr + C218_key);
492 if (tmp != CP204J_KeyCode)
493 goto err;
494 break;
495 default:
496 tmp = readw(baseAddr + C320_key);
497 if (tmp != C320_KeyCode)
498 goto err;
499 tmp = readw(baseAddr + C320_status);
500 if (tmp != STS_init) {
501 printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic "
502 "module not found\n");
503 return -EIO;
504 }
505 break;
506 }
507
508 return 0;
509err:
510 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
511 return -EIO;
512}
513
514static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
515 size_t len)
516{
517 void __iomem *baseAddr = brd->basemem;
518
519 if (len < 7168) {
520 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
521 return -EINVAL;
522 }
523
524 writew(len - 7168 - 2, baseAddr + C320bapi_len);
525 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
526 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
527 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
528 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
529
530 return 0;
531}
532
533static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
534 size_t len)
535{
536 void __iomem *baseAddr = brd->basemem;
537 const __le16 *uptr = ptr;
538 size_t wlen, len2, j;
539 unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
540 unsigned int i, retry;
541 u16 usum, keycode;
542
543 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
544 C218_KeyCode;
545
546 switch (brd->boardType) {
547 case MOXA_BOARD_CP204J:
548 case MOXA_BOARD_C218_ISA:
549 case MOXA_BOARD_C218_PCI:
550 key = C218_key;
551 loadbuf = C218_LoadBuf;
552 loadlen = C218DLoad_len;
553 checksum = C218check_sum;
554 checksum_ok = C218chksum_ok;
555 break;
556 default:
557 key = C320_key;
558 keycode = C320_KeyCode;
559 loadbuf = C320_LoadBuf;
560 loadlen = C320DLoad_len;
561 checksum = C320check_sum;
562 checksum_ok = C320chksum_ok;
563 break;
564 }
565
566 usum = 0;
567 wlen = len >> 1;
568 for (i = 0; i < wlen; i++)
569 usum += le16_to_cpu(uptr[i]);
570 retry = 0;
571 do {
572 wlen = len >> 1;
573 j = 0;
574 while (wlen) {
575 len2 = (wlen > 2048) ? 2048 : wlen;
576 wlen -= len2;
577 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
578 j += len2 << 1;
579
580 writew(len2, baseAddr + loadlen);
581 writew(0, baseAddr + key);
582 for (i = 0; i < 100; i++) {
583 if (readw(baseAddr + key) == keycode)
584 break;
585 msleep(10);
586 }
587 if (readw(baseAddr + key) != keycode)
588 return -EIO;
589 }
590 writew(0, baseAddr + loadlen);
591 writew(usum, baseAddr + checksum);
592 writew(0, baseAddr + key);
593 for (i = 0; i < 100; i++) {
594 if (readw(baseAddr + key) == keycode)
595 break;
596 msleep(10);
597 }
598 retry++;
599 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
600 if (readb(baseAddr + checksum_ok) != 1)
601 return -EIO;
602
603 writew(0, baseAddr + key);
604 for (i = 0; i < 600; i++) {
605 if (readw(baseAddr + Magic_no) == Magic_code)
606 break;
607 msleep(10);
608 }
609 if (readw(baseAddr + Magic_no) != Magic_code)
610 return -EIO;
611
612 if (MOXA_IS_320(brd)) {
613 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
614 writew(0x3800, baseAddr + TMS320_PORT1);
615 writew(0x3900, baseAddr + TMS320_PORT2);
616 writew(28499, baseAddr + TMS320_CLOCK);
617 } else {
618 writew(0x3200, baseAddr + TMS320_PORT1);
619 writew(0x3400, baseAddr + TMS320_PORT2);
620 writew(19999, baseAddr + TMS320_CLOCK);
621 }
622 }
623 writew(1, baseAddr + Disable_IRQ);
624 writew(0, baseAddr + Magic_no);
625 for (i = 0; i < 500; i++) {
626 if (readw(baseAddr + Magic_no) == Magic_code)
627 break;
628 msleep(10);
629 }
630 if (readw(baseAddr + Magic_no) != Magic_code)
631 return -EIO;
632
633 if (MOXA_IS_320(brd)) {
634 j = readw(baseAddr + Module_cnt);
635 if (j <= 0)
636 return -EIO;
637 brd->numPorts = j * 8;
638 writew(j, baseAddr + Module_no);
639 writew(0, baseAddr + Magic_no);
640 for (i = 0; i < 600; i++) {
641 if (readw(baseAddr + Magic_no) == Magic_code)
642 break;
643 msleep(10);
644 }
645 if (readw(baseAddr + Magic_no) != Magic_code)
646 return -EIO;
647 }
648 brd->intNdx = baseAddr + IRQindex;
649 brd->intPend = baseAddr + IRQpending;
650 brd->intTable = baseAddr + IRQtable;
651
652 return 0;
653}
654
655static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
656 size_t len)
657{
658 void __iomem *ofsAddr, *baseAddr = brd->basemem;
659 struct moxa_port *port;
660 int retval, i;
661
662 if (len % 2) {
663 printk(KERN_ERR "MOXA: bios length is not even\n");
664 return -EINVAL;
665 }
666
667 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
668 if (retval)
669 return retval;
670
671 switch (brd->boardType) {
672 case MOXA_BOARD_C218_ISA:
673 case MOXA_BOARD_C218_PCI:
674 case MOXA_BOARD_CP204J:
675 port = brd->ports;
676 for (i = 0; i < brd->numPorts; i++, port++) {
677 port->board = brd;
678 port->DCDState = 0;
679 port->tableAddr = baseAddr + Extern_table +
680 Extern_size * i;
681 ofsAddr = port->tableAddr;
682 writew(C218rx_mask, ofsAddr + RX_mask);
683 writew(C218tx_mask, ofsAddr + TX_mask);
684 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
685 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
686
687 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
688 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
689
690 }
691 break;
692 default:
693 port = brd->ports;
694 for (i = 0; i < brd->numPorts; i++, port++) {
695 port->board = brd;
696 port->DCDState = 0;
697 port->tableAddr = baseAddr + Extern_table +
698 Extern_size * i;
699 ofsAddr = port->tableAddr;
700 switch (brd->numPorts) {
701 case 8:
702 writew(C320p8rx_mask, ofsAddr + RX_mask);
703 writew(C320p8tx_mask, ofsAddr + TX_mask);
704 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
705 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
706 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
707 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
708
709 break;
710 case 16:
711 writew(C320p16rx_mask, ofsAddr + RX_mask);
712 writew(C320p16tx_mask, ofsAddr + TX_mask);
713 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
714 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
715 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
716 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
717 break;
718
719 case 24:
720 writew(C320p24rx_mask, ofsAddr + RX_mask);
721 writew(C320p24tx_mask, ofsAddr + TX_mask);
722 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
723 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
724 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
725 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
726 break;
727 case 32:
728 writew(C320p32rx_mask, ofsAddr + RX_mask);
729 writew(C320p32tx_mask, ofsAddr + TX_mask);
730 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
731 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
732 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
733 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
734 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
735 break;
736 }
737 }
738 break;
739 }
740 return 0;
741}
742
743static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
744{
745 const void *ptr = fw->data;
746 char rsn[64];
747 u16 lens[5];
748 size_t len;
749 unsigned int a, lenp, lencnt;
750 int ret = -EINVAL;
751 struct {
752 __le32 magic; /* 0x34303430 */
753 u8 reserved1[2];
754 u8 type; /* UNIX = 3 */
755 u8 model; /* C218T=1, C320T=2, CP204=3 */
756 u8 reserved2[8];
757 __le16 len[5];
758 } const *hdr = ptr;
759
760 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
761
762 if (fw->size < MOXA_FW_HDRLEN) {
763 strcpy(rsn, "too short (even header won't fit)");
764 goto err;
765 }
766 if (hdr->magic != cpu_to_le32(0x30343034)) {
767 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
768 goto err;
769 }
770 if (hdr->type != 3) {
771 sprintf(rsn, "not for linux, type is %u", hdr->type);
772 goto err;
773 }
774 if (moxa_check_fw_model(brd, hdr->model)) {
775 sprintf(rsn, "not for this card, model is %u", hdr->model);
776 goto err;
777 }
778
779 len = MOXA_FW_HDRLEN;
780 lencnt = hdr->model == 2 ? 5 : 3;
781 for (a = 0; a < ARRAY_SIZE(lens); a++) {
782 lens[a] = le16_to_cpu(hdr->len[a]);
783 if (lens[a] && len + lens[a] <= fw->size &&
784 moxa_check_fw(&fw->data[len]))
785 printk(KERN_WARNING "MOXA firmware: unexpected input "
786 "at offset %u, but going on\n", (u32)len);
787 if (!lens[a] && a < lencnt) {
788 sprintf(rsn, "too few entries in fw file");
789 goto err;
790 }
791 len += lens[a];
792 }
793
794 if (len != fw->size) {
795 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
796 (u32)len);
797 goto err;
798 }
799
800 ptr += MOXA_FW_HDRLEN;
801 lenp = 0; /* bios */
802
803 strcpy(rsn, "read above");
804
805 ret = moxa_load_bios(brd, ptr, lens[lenp]);
806 if (ret)
807 goto err;
808
809 /* we skip the tty section (lens[1]), since we don't need it */
810 ptr += lens[lenp] + lens[lenp + 1];
811 lenp += 2; /* comm */
812
813 if (hdr->model == 2) {
814 ret = moxa_load_320b(brd, ptr, lens[lenp]);
815 if (ret)
816 goto err;
817 /* skip another tty */
818 ptr += lens[lenp] + lens[lenp + 1];
819 lenp += 2;
820 }
821
822 ret = moxa_load_code(brd, ptr, lens[lenp]);
823 if (ret)
824 goto err;
825
826 return 0;
827err:
828 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
829 return ret;
830}
831
832static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
833{
834 const struct firmware *fw;
835 const char *file;
836 struct moxa_port *p;
837 unsigned int i;
838 int ret;
839
840 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
841 GFP_KERNEL);
842 if (brd->ports == NULL) {
843 printk(KERN_ERR "cannot allocate memory for ports\n");
844 ret = -ENOMEM;
845 goto err;
846 }
847
848 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
849 tty_port_init(&p->port);
850 p->port.ops = &moxa_port_ops;
851 p->type = PORT_16550A;
852 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
853 }
854
855 switch (brd->boardType) {
856 case MOXA_BOARD_C218_ISA:
857 case MOXA_BOARD_C218_PCI:
858 file = "c218tunx.cod";
859 break;
860 case MOXA_BOARD_CP204J:
861 file = "cp204unx.cod";
862 break;
863 default:
864 file = "c320tunx.cod";
865 break;
866 }
867
868 ret = request_firmware(&fw, file, dev);
869 if (ret) {
870 printk(KERN_ERR "MOXA: request_firmware failed. Make sure "
871 "you've placed '%s' file into your firmware "
872 "loader directory (e.g. /lib/firmware)\n",
873 file);
874 goto err_free;
875 }
876
877 ret = moxa_load_fw(brd, fw);
878
879 release_firmware(fw);
880
881 if (ret)
882 goto err_free;
883
884 spin_lock_bh(&moxa_lock);
885 brd->ready = 1;
886 if (!timer_pending(&moxaTimer))
887 mod_timer(&moxaTimer, jiffies + HZ / 50);
888 spin_unlock_bh(&moxa_lock);
889
890 return 0;
891err_free:
892 kfree(brd->ports);
893err:
894 return ret;
895}
896
897static void moxa_board_deinit(struct moxa_board_conf *brd)
898{
899 unsigned int a, opened;
900
901 mutex_lock(&moxa_openlock);
902 spin_lock_bh(&moxa_lock);
903 brd->ready = 0;
904 spin_unlock_bh(&moxa_lock);
905
906 /* pci hot-un-plug support */
907 for (a = 0; a < brd->numPorts; a++)
908 if (brd->ports[a].port.flags & ASYNC_INITIALIZED) {
909 struct tty_struct *tty = tty_port_tty_get(
910 &brd->ports[a].port);
911 if (tty) {
912 tty_hangup(tty);
913 tty_kref_put(tty);
914 }
915 }
916 while (1) {
917 opened = 0;
918 for (a = 0; a < brd->numPorts; a++)
919 if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
920 opened++;
921 mutex_unlock(&moxa_openlock);
922 if (!opened)
923 break;
924 msleep(50);
925 mutex_lock(&moxa_openlock);
926 }
927
928 iounmap(brd->basemem);
929 brd->basemem = NULL;
930 kfree(brd->ports);
931}
932
933#ifdef CONFIG_PCI
934static int __devinit moxa_pci_probe(struct pci_dev *pdev,
935 const struct pci_device_id *ent)
936{
937 struct moxa_board_conf *board;
938 unsigned int i;
939 int board_type = ent->driver_data;
940 int retval;
941
942 retval = pci_enable_device(pdev);
943 if (retval) {
944 dev_err(&pdev->dev, "can't enable pci device\n");
945 goto err;
946 }
947
948 for (i = 0; i < MAX_BOARDS; i++)
949 if (moxa_boards[i].basemem == NULL)
950 break;
951
952 retval = -ENODEV;
953 if (i >= MAX_BOARDS) {
954 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
955 "found. Board is ignored.\n", MAX_BOARDS);
956 goto err;
957 }
958
959 board = &moxa_boards[i];
960
961 retval = pci_request_region(pdev, 2, "moxa-base");
962 if (retval) {
963 dev_err(&pdev->dev, "can't request pci region 2\n");
964 goto err;
965 }
966
967 board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000);
968 if (board->basemem == NULL) {
969 dev_err(&pdev->dev, "can't remap io space 2\n");
970 goto err_reg;
971 }
972
973 board->boardType = board_type;
974 switch (board_type) {
975 case MOXA_BOARD_C218_ISA:
976 case MOXA_BOARD_C218_PCI:
977 board->numPorts = 8;
978 break;
979
980 case MOXA_BOARD_CP204J:
981 board->numPorts = 4;
982 break;
983 default:
984 board->numPorts = 0;
985 break;
986 }
987 board->busType = MOXA_BUS_TYPE_PCI;
988
989 retval = moxa_init_board(board, &pdev->dev);
990 if (retval)
991 goto err_base;
992
993 pci_set_drvdata(pdev, board);
994
995 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
996 moxa_brdname[board_type - 1], board->numPorts);
997
998 return 0;
999err_base:
1000 iounmap(board->basemem);
1001 board->basemem = NULL;
1002err_reg:
1003 pci_release_region(pdev, 2);
1004err:
1005 return retval;
1006}
1007
1008static void __devexit moxa_pci_remove(struct pci_dev *pdev)
1009{
1010 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
1011
1012 moxa_board_deinit(brd);
1013
1014 pci_release_region(pdev, 2);
1015}
1016
1017static struct pci_driver moxa_pci_driver = {
1018 .name = "moxa",
1019 .id_table = moxa_pcibrds,
1020 .probe = moxa_pci_probe,
1021 .remove = __devexit_p(moxa_pci_remove)
1022};
1023#endif /* CONFIG_PCI */
1024
1025static int __init moxa_init(void)
1026{
1027 unsigned int isabrds = 0;
1028 int retval = 0;
1029 struct moxa_board_conf *brd = moxa_boards;
1030 unsigned int i;
1031
1032 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
1033 MOXA_VERSION);
1034 moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
1035 if (!moxaDriver)
1036 return -ENOMEM;
1037
1038 moxaDriver->name = "ttyMX";
1039 moxaDriver->major = ttymajor;
1040 moxaDriver->minor_start = 0;
1041 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
1042 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
1043 moxaDriver->init_termios = tty_std_termios;
1044 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
1045 moxaDriver->init_termios.c_ispeed = 9600;
1046 moxaDriver->init_termios.c_ospeed = 9600;
1047 moxaDriver->flags = TTY_DRIVER_REAL_RAW;
1048 tty_set_operations(moxaDriver, &moxa_ops);
1049
1050 if (tty_register_driver(moxaDriver)) {
1051 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
1052 put_tty_driver(moxaDriver);
1053 return -1;
1054 }
1055
1056 /* Find the boards defined from module args. */
1057
1058 for (i = 0; i < MAX_BOARDS; i++) {
1059 if (!baseaddr[i])
1060 break;
1061 if (type[i] == MOXA_BOARD_C218_ISA ||
1062 type[i] == MOXA_BOARD_C320_ISA) {
1063 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
1064 isabrds + 1, moxa_brdname[type[i] - 1],
1065 baseaddr[i]);
1066 brd->boardType = type[i];
1067 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
1068 numports[i];
1069 brd->busType = MOXA_BUS_TYPE_ISA;
1070 brd->basemem = ioremap_nocache(baseaddr[i], 0x4000);
1071 if (!brd->basemem) {
1072 printk(KERN_ERR "MOXA: can't remap %lx\n",
1073 baseaddr[i]);
1074 continue;
1075 }
1076 if (moxa_init_board(brd, NULL)) {
1077 iounmap(brd->basemem);
1078 brd->basemem = NULL;
1079 continue;
1080 }
1081
1082 printk(KERN_INFO "MOXA isa board found at 0x%.8lu and "
1083 "ready (%u ports, firmware loaded)\n",
1084 baseaddr[i], brd->numPorts);
1085
1086 brd++;
1087 isabrds++;
1088 }
1089 }
1090
1091#ifdef CONFIG_PCI
1092 retval = pci_register_driver(&moxa_pci_driver);
1093 if (retval) {
1094 printk(KERN_ERR "Can't register MOXA pci driver!\n");
1095 if (isabrds)
1096 retval = 0;
1097 }
1098#endif
1099
1100 return retval;
1101}
1102
1103static void __exit moxa_exit(void)
1104{
1105 unsigned int i;
1106
1107#ifdef CONFIG_PCI
1108 pci_unregister_driver(&moxa_pci_driver);
1109#endif
1110
1111 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
1112 if (moxa_boards[i].ready)
1113 moxa_board_deinit(&moxa_boards[i]);
1114
1115 del_timer_sync(&moxaTimer);
1116
1117 if (tty_unregister_driver(moxaDriver))
1118 printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
1119 "serial driver\n");
1120 put_tty_driver(moxaDriver);
1121}
1122
1123module_init(moxa_init);
1124module_exit(moxa_exit);
1125
1126static void moxa_shutdown(struct tty_port *port)
1127{
1128 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1129 MoxaPortDisable(ch);
1130 MoxaPortFlushData(ch, 2);
1131}
1132
1133static int moxa_carrier_raised(struct tty_port *port)
1134{
1135 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1136 int dcd;
1137
1138 spin_lock_irq(&port->lock);
1139 dcd = ch->DCDState;
1140 spin_unlock_irq(&port->lock);
1141 return dcd;
1142}
1143
1144static void moxa_dtr_rts(struct tty_port *port, int onoff)
1145{
1146 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1147 MoxaPortLineCtrl(ch, onoff, onoff);
1148}
1149
1150
1151static int moxa_open(struct tty_struct *tty, struct file *filp)
1152{
1153 struct moxa_board_conf *brd;
1154 struct moxa_port *ch;
1155 int port;
1156
1157 port = tty->index;
1158 if (port == MAX_PORTS) {
1159 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
1160 }
1161 if (mutex_lock_interruptible(&moxa_openlock))
1162 return -ERESTARTSYS;
1163 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
1164 if (!brd->ready) {
1165 mutex_unlock(&moxa_openlock);
1166 return -ENODEV;
1167 }
1168
1169 if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) {
1170 mutex_unlock(&moxa_openlock);
1171 return -ENODEV;
1172 }
1173
1174 ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
1175 ch->port.count++;
1176 tty->driver_data = ch;
1177 tty_port_tty_set(&ch->port, tty);
1178 mutex_lock(&ch->port.mutex);
1179 if (!(ch->port.flags & ASYNC_INITIALIZED)) {
1180 ch->statusflags = 0;
1181 moxa_set_tty_param(tty, tty->termios);
1182 MoxaPortLineCtrl(ch, 1, 1);
1183 MoxaPortEnable(ch);
1184 MoxaSetFifo(ch, ch->type == PORT_16550A);
1185 ch->port.flags |= ASYNC_INITIALIZED;
1186 }
1187 mutex_unlock(&ch->port.mutex);
1188 mutex_unlock(&moxa_openlock);
1189
1190 return tty_port_block_til_ready(&ch->port, tty, filp);
1191}
1192
1193static void moxa_close(struct tty_struct *tty, struct file *filp)
1194{
1195 struct moxa_port *ch = tty->driver_data;
1196 ch->cflag = tty->termios->c_cflag;
1197 tty_port_close(&ch->port, tty, filp);
1198}
1199
1200static int moxa_write(struct tty_struct *tty,
1201 const unsigned char *buf, int count)
1202{
1203 struct moxa_port *ch = tty->driver_data;
1204 unsigned long flags;
1205 int len;
1206
1207 if (ch == NULL)
1208 return 0;
1209
1210 spin_lock_irqsave(&moxa_lock, flags);
1211 len = MoxaPortWriteData(tty, buf, count);
1212 spin_unlock_irqrestore(&moxa_lock, flags);
1213
1214 set_bit(LOWWAIT, &ch->statusflags);
1215 return len;
1216}
1217
1218static int moxa_write_room(struct tty_struct *tty)
1219{
1220 struct moxa_port *ch;
1221
1222 if (tty->stopped)
1223 return 0;
1224 ch = tty->driver_data;
1225 if (ch == NULL)
1226 return 0;
1227 return MoxaPortTxFree(ch);
1228}
1229
1230static void moxa_flush_buffer(struct tty_struct *tty)
1231{
1232 struct moxa_port *ch = tty->driver_data;
1233
1234 if (ch == NULL)
1235 return;
1236 MoxaPortFlushData(ch, 1);
1237 tty_wakeup(tty);
1238}
1239
1240static int moxa_chars_in_buffer(struct tty_struct *tty)
1241{
1242 struct moxa_port *ch = tty->driver_data;
1243 int chars;
1244
1245 chars = MoxaPortTxQueue(ch);
1246 if (chars)
1247 /*
1248 * Make it possible to wakeup anything waiting for output
1249 * in tty_ioctl.c, etc.
1250 */
1251 set_bit(EMPTYWAIT, &ch->statusflags);
1252 return chars;
1253}
1254
1255static int moxa_tiocmget(struct tty_struct *tty)
1256{
1257 struct moxa_port *ch = tty->driver_data;
1258 int flag = 0, dtr, rts;
1259
1260 MoxaPortGetLineOut(ch, &dtr, &rts);
1261 if (dtr)
1262 flag |= TIOCM_DTR;
1263 if (rts)
1264 flag |= TIOCM_RTS;
1265 dtr = MoxaPortLineStatus(ch);
1266 if (dtr & 1)
1267 flag |= TIOCM_CTS;
1268 if (dtr & 2)
1269 flag |= TIOCM_DSR;
1270 if (dtr & 4)
1271 flag |= TIOCM_CD;
1272 return flag;
1273}
1274
1275static int moxa_tiocmset(struct tty_struct *tty,
1276 unsigned int set, unsigned int clear)
1277{
1278 struct moxa_port *ch;
1279 int dtr, rts;
1280
1281 mutex_lock(&moxa_openlock);
1282 ch = tty->driver_data;
1283 if (!ch) {
1284 mutex_unlock(&moxa_openlock);
1285 return -EINVAL;
1286 }
1287
1288 MoxaPortGetLineOut(ch, &dtr, &rts);
1289 if (set & TIOCM_RTS)
1290 rts = 1;
1291 if (set & TIOCM_DTR)
1292 dtr = 1;
1293 if (clear & TIOCM_RTS)
1294 rts = 0;
1295 if (clear & TIOCM_DTR)
1296 dtr = 0;
1297 MoxaPortLineCtrl(ch, dtr, rts);
1298 mutex_unlock(&moxa_openlock);
1299 return 0;
1300}
1301
1302static void moxa_set_termios(struct tty_struct *tty,
1303 struct ktermios *old_termios)
1304{
1305 struct moxa_port *ch = tty->driver_data;
1306
1307 if (ch == NULL)
1308 return;
1309 moxa_set_tty_param(tty, old_termios);
1310 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
1311 wake_up_interruptible(&ch->port.open_wait);
1312}
1313
1314static void moxa_stop(struct tty_struct *tty)
1315{
1316 struct moxa_port *ch = tty->driver_data;
1317
1318 if (ch == NULL)
1319 return;
1320 MoxaPortTxDisable(ch);
1321 set_bit(TXSTOPPED, &ch->statusflags);
1322}
1323
1324
1325static void moxa_start(struct tty_struct *tty)
1326{
1327 struct moxa_port *ch = tty->driver_data;
1328
1329 if (ch == NULL)
1330 return;
1331
1332 if (!test_bit(TXSTOPPED, &ch->statusflags))
1333 return;
1334
1335 MoxaPortTxEnable(ch);
1336 clear_bit(TXSTOPPED, &ch->statusflags);
1337}
1338
1339static void moxa_hangup(struct tty_struct *tty)
1340{
1341 struct moxa_port *ch = tty->driver_data;
1342 tty_port_hangup(&ch->port);
1343}
1344
1345static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
1346{
1347 struct tty_struct *tty;
1348 unsigned long flags;
1349 dcd = !!dcd;
1350
1351 spin_lock_irqsave(&p->port.lock, flags);
1352 if (dcd != p->DCDState) {
1353 p->DCDState = dcd;
1354 spin_unlock_irqrestore(&p->port.lock, flags);
1355 tty = tty_port_tty_get(&p->port);
1356 if (tty && C_CLOCAL(tty) && !dcd)
1357 tty_hangup(tty);
1358 tty_kref_put(tty);
1359 }
1360 else
1361 spin_unlock_irqrestore(&p->port.lock, flags);
1362}
1363
1364static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
1365 u16 __iomem *ip)
1366{
1367 struct tty_struct *tty = tty_port_tty_get(&p->port);
1368 void __iomem *ofsAddr;
1369 unsigned int inited = p->port.flags & ASYNC_INITIALIZED;
1370 u16 intr;
1371
1372 if (tty) {
1373 if (test_bit(EMPTYWAIT, &p->statusflags) &&
1374 MoxaPortTxQueue(p) == 0) {
1375 clear_bit(EMPTYWAIT, &p->statusflags);
1376 tty_wakeup(tty);
1377 }
1378 if (test_bit(LOWWAIT, &p->statusflags) && !tty->stopped &&
1379 MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
1380 clear_bit(LOWWAIT, &p->statusflags);
1381 tty_wakeup(tty);
1382 }
1383
1384 if (inited && !test_bit(TTY_THROTTLED, &tty->flags) &&
1385 MoxaPortRxQueue(p) > 0) { /* RX */
1386 MoxaPortReadData(p);
1387 tty_schedule_flip(tty);
1388 }
1389 } else {
1390 clear_bit(EMPTYWAIT, &p->statusflags);
1391 MoxaPortFlushData(p, 0); /* flush RX */
1392 }
1393
1394 if (!handle) /* nothing else to do */
1395 goto put;
1396
1397 intr = readw(ip); /* port irq status */
1398 if (intr == 0)
1399 goto put;
1400
1401 writew(0, ip); /* ACK port */
1402 ofsAddr = p->tableAddr;
1403 if (intr & IntrTx) /* disable tx intr */
1404 writew(readw(ofsAddr + HostStat) & ~WakeupTx,
1405 ofsAddr + HostStat);
1406
1407 if (!inited)
1408 goto put;
1409
1410 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
1411 tty_insert_flip_char(tty, 0, TTY_BREAK);
1412 tty_schedule_flip(tty);
1413 }
1414
1415 if (intr & IntrLine)
1416 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
1417put:
1418 tty_kref_put(tty);
1419
1420 return 0;
1421}
1422
1423static void moxa_poll(unsigned long ignored)
1424{
1425 struct moxa_board_conf *brd;
1426 u16 __iomem *ip;
1427 unsigned int card, port, served = 0;
1428
1429 spin_lock(&moxa_lock);
1430 for (card = 0; card < MAX_BOARDS; card++) {
1431 brd = &moxa_boards[card];
1432 if (!brd->ready)
1433 continue;
1434
1435 served++;
1436
1437 ip = NULL;
1438 if (readb(brd->intPend) == 0xff)
1439 ip = brd->intTable + readb(brd->intNdx);
1440
1441 for (port = 0; port < brd->numPorts; port++)
1442 moxa_poll_port(&brd->ports[port], !!ip, ip + port);
1443
1444 if (ip)
1445 writeb(0, brd->intPend); /* ACK */
1446
1447 if (moxaLowWaterChk) {
1448 struct moxa_port *p = brd->ports;
1449 for (port = 0; port < brd->numPorts; port++, p++)
1450 if (p->lowChkFlag) {
1451 p->lowChkFlag = 0;
1452 moxa_low_water_check(p->tableAddr);
1453 }
1454 }
1455 }
1456 moxaLowWaterChk = 0;
1457
1458 if (served)
1459 mod_timer(&moxaTimer, jiffies + HZ / 50);
1460 spin_unlock(&moxa_lock);
1461}
1462
1463/******************************************************************************/
1464
1465static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
1466{
1467 register struct ktermios *ts = tty->termios;
1468 struct moxa_port *ch = tty->driver_data;
1469 int rts, cts, txflow, rxflow, xany, baud;
1470
1471 rts = cts = txflow = rxflow = xany = 0;
1472 if (ts->c_cflag & CRTSCTS)
1473 rts = cts = 1;
1474 if (ts->c_iflag & IXON)
1475 txflow = 1;
1476 if (ts->c_iflag & IXOFF)
1477 rxflow = 1;
1478 if (ts->c_iflag & IXANY)
1479 xany = 1;
1480
1481 /* Clear the features we don't support */
1482 ts->c_cflag &= ~CMSPAR;
1483 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1484 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
1485 if (baud == -1)
1486 baud = tty_termios_baud_rate(old_termios);
1487 /* Not put the baud rate into the termios data */
1488 tty_encode_baud_rate(tty, baud, baud);
1489}
1490
1491/*****************************************************************************
1492 * Driver level functions: *
1493 *****************************************************************************/
1494
1495static void MoxaPortFlushData(struct moxa_port *port, int mode)
1496{
1497 void __iomem *ofsAddr;
1498 if (mode < 0 || mode > 2)
1499 return;
1500 ofsAddr = port->tableAddr;
1501 moxafunc(ofsAddr, FC_FlushQueue, mode);
1502 if (mode != 1) {
1503 port->lowChkFlag = 0;
1504 moxa_low_water_check(ofsAddr);
1505 }
1506}
1507
1508/*
1509 * Moxa Port Number Description:
1510 *
1511 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1512 * the port number using in MOXA driver functions will be 0 to 31 for
1513 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1514 * to 127 for fourth. For example, if you setup three MOXA boards,
1515 * first board is C218, second board is C320-16 and third board is
1516 * C320-32. The port number of first board (C218 - 8 ports) is from
1517 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1518 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1519 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1520 * 127 will be invalid.
1521 *
1522 *
1523 * Moxa Functions Description:
1524 *
1525 * Function 1: Driver initialization routine, this routine must be
1526 * called when initialized driver.
1527 * Syntax:
1528 * void MoxaDriverInit();
1529 *
1530 *
1531 * Function 2: Moxa driver private IOCTL command processing.
1532 * Syntax:
1533 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1534 *
1535 * unsigned int cmd : IOCTL command
1536 * unsigned long arg : IOCTL argument
1537 * int port : port number (0 - 127)
1538 *
1539 * return: 0 (OK)
1540 * -EINVAL
1541 * -ENOIOCTLCMD
1542 *
1543 *
1544 * Function 6: Enable this port to start Tx/Rx data.
1545 * Syntax:
1546 * void MoxaPortEnable(int port);
1547 * int port : port number (0 - 127)
1548 *
1549 *
1550 * Function 7: Disable this port
1551 * Syntax:
1552 * void MoxaPortDisable(int port);
1553 * int port : port number (0 - 127)
1554 *
1555 *
1556 * Function 10: Setting baud rate of this port.
1557 * Syntax:
1558 * speed_t MoxaPortSetBaud(int port, speed_t baud);
1559 * int port : port number (0 - 127)
1560 * long baud : baud rate (50 - 115200)
1561 *
1562 * return: 0 : this port is invalid or baud < 50
1563 * 50 - 115200 : the real baud rate set to the port, if
1564 * the argument baud is large than maximun
1565 * available baud rate, the real setting
1566 * baud rate will be the maximun baud rate.
1567 *
1568 *
1569 * Function 12: Configure the port.
1570 * Syntax:
1571 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1572 * int port : port number (0 - 127)
1573 * struct ktermios * termio : termio structure pointer
1574 * speed_t baud : baud rate
1575 *
1576 * return: -1 : this port is invalid or termio == NULL
1577 * 0 : setting O.K.
1578 *
1579 *
1580 * Function 13: Get the DTR/RTS state of this port.
1581 * Syntax:
1582 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1583 * int port : port number (0 - 127)
1584 * int * dtrState : pointer to INT to receive the current DTR
1585 * state. (if NULL, this function will not
1586 * write to this address)
1587 * int * rtsState : pointer to INT to receive the current RTS
1588 * state. (if NULL, this function will not
1589 * write to this address)
1590 *
1591 * return: -1 : this port is invalid
1592 * 0 : O.K.
1593 *
1594 *
1595 * Function 14: Setting the DTR/RTS output state of this port.
1596 * Syntax:
1597 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1598 * int port : port number (0 - 127)
1599 * int dtrState : DTR output state (0: off, 1: on)
1600 * int rtsState : RTS output state (0: off, 1: on)
1601 *
1602 *
1603 * Function 15: Setting the flow control of this port.
1604 * Syntax:
1605 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1606 * int txFlow,int xany);
1607 * int port : port number (0 - 127)
1608 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1609 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1610 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1611 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1612 * int xany : S/W XANY flow control (0: no, 1: yes)
1613 *
1614 *
1615 * Function 16: Get ths line status of this port
1616 * Syntax:
1617 * int MoxaPortLineStatus(int port);
1618 * int port : port number (0 - 127)
1619 *
1620 * return: Bit 0 - CTS state (0: off, 1: on)
1621 * Bit 1 - DSR state (0: off, 1: on)
1622 * Bit 2 - DCD state (0: off, 1: on)
1623 *
1624 *
1625 * Function 19: Flush the Rx/Tx buffer data of this port.
1626 * Syntax:
1627 * void MoxaPortFlushData(int port, int mode);
1628 * int port : port number (0 - 127)
1629 * int mode
1630 * 0 : flush the Rx buffer
1631 * 1 : flush the Tx buffer
1632 * 2 : flush the Rx and Tx buffer
1633 *
1634 *
1635 * Function 20: Write data.
1636 * Syntax:
1637 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1638 * int port : port number (0 - 127)
1639 * unsigned char * buffer : pointer to write data buffer.
1640 * int length : write data length
1641 *
1642 * return: 0 - length : real write data length
1643 *
1644 *
1645 * Function 21: Read data.
1646 * Syntax:
1647 * int MoxaPortReadData(int port, struct tty_struct *tty);
1648 * int port : port number (0 - 127)
1649 * struct tty_struct *tty : tty for data
1650 *
1651 * return: 0 - length : real read data length
1652 *
1653 *
1654 * Function 24: Get the Tx buffer current queued data bytes
1655 * Syntax:
1656 * int MoxaPortTxQueue(int port);
1657 * int port : port number (0 - 127)
1658 *
1659 * return: .. : Tx buffer current queued data bytes
1660 *
1661 *
1662 * Function 25: Get the Tx buffer current free space
1663 * Syntax:
1664 * int MoxaPortTxFree(int port);
1665 * int port : port number (0 - 127)
1666 *
1667 * return: .. : Tx buffer current free space
1668 *
1669 *
1670 * Function 26: Get the Rx buffer current queued data bytes
1671 * Syntax:
1672 * int MoxaPortRxQueue(int port);
1673 * int port : port number (0 - 127)
1674 *
1675 * return: .. : Rx buffer current queued data bytes
1676 *
1677 *
1678 * Function 28: Disable port data transmission.
1679 * Syntax:
1680 * void MoxaPortTxDisable(int port);
1681 * int port : port number (0 - 127)
1682 *
1683 *
1684 * Function 29: Enable port data transmission.
1685 * Syntax:
1686 * void MoxaPortTxEnable(int port);
1687 * int port : port number (0 - 127)
1688 *
1689 *
1690 * Function 31: Get the received BREAK signal count and reset it.
1691 * Syntax:
1692 * int MoxaPortResetBrkCnt(int port);
1693 * int port : port number (0 - 127)
1694 *
1695 * return: 0 - .. : BREAK signal count
1696 *
1697 *
1698 */
1699
1700static void MoxaPortEnable(struct moxa_port *port)
1701{
1702 void __iomem *ofsAddr;
1703 u16 lowwater = 512;
1704
1705 ofsAddr = port->tableAddr;
1706 writew(lowwater, ofsAddr + Low_water);
1707 if (MOXA_IS_320(port->board))
1708 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
1709 else
1710 writew(readw(ofsAddr + HostStat) | WakeupBreak,
1711 ofsAddr + HostStat);
1712
1713 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
1714 moxafunc(ofsAddr, FC_FlushQueue, 2);
1715
1716 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
1717 MoxaPortLineStatus(port);
1718}
1719
1720static void MoxaPortDisable(struct moxa_port *port)
1721{
1722 void __iomem *ofsAddr = port->tableAddr;
1723
1724 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
1725 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
1726 writew(0, ofsAddr + HostStat);
1727 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
1728}
1729
1730static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
1731{
1732 void __iomem *ofsAddr = port->tableAddr;
1733 unsigned int clock, val;
1734 speed_t max;
1735
1736 max = MOXA_IS_320(port->board) ? 460800 : 921600;
1737 if (baud < 50)
1738 return 0;
1739 if (baud > max)
1740 baud = max;
1741 clock = 921600;
1742 val = clock / baud;
1743 moxafunc(ofsAddr, FC_SetBaud, val);
1744 baud = clock / val;
1745 return baud;
1746}
1747
1748static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
1749 speed_t baud)
1750{
1751 void __iomem *ofsAddr;
1752 tcflag_t mode = 0;
1753
1754 ofsAddr = port->tableAddr;
1755
1756 mode = termio->c_cflag & CSIZE;
1757 if (mode == CS5)
1758 mode = MX_CS5;
1759 else if (mode == CS6)
1760 mode = MX_CS6;
1761 else if (mode == CS7)
1762 mode = MX_CS7;
1763 else if (mode == CS8)
1764 mode = MX_CS8;
1765
1766 if (termio->c_cflag & CSTOPB) {
1767 if (mode == MX_CS5)
1768 mode |= MX_STOP15;
1769 else
1770 mode |= MX_STOP2;
1771 } else
1772 mode |= MX_STOP1;
1773
1774 if (termio->c_cflag & PARENB) {
1775 if (termio->c_cflag & PARODD)
1776 mode |= MX_PARODD;
1777 else
1778 mode |= MX_PAREVEN;
1779 } else
1780 mode |= MX_PARNONE;
1781
1782 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
1783
1784 if (MOXA_IS_320(port->board) && baud >= 921600)
1785 return -1;
1786
1787 baud = MoxaPortSetBaud(port, baud);
1788
1789 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
1790 spin_lock_irq(&moxafunc_lock);
1791 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
1792 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
1793 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
1794 moxa_wait_finish(ofsAddr);
1795 spin_unlock_irq(&moxafunc_lock);
1796
1797 }
1798 return baud;
1799}
1800
1801static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
1802 int *rtsState)
1803{
1804 if (dtrState)
1805 *dtrState = !!(port->lineCtrl & DTR_ON);
1806 if (rtsState)
1807 *rtsState = !!(port->lineCtrl & RTS_ON);
1808
1809 return 0;
1810}
1811
1812static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
1813{
1814 u8 mode = 0;
1815
1816 if (dtr)
1817 mode |= DTR_ON;
1818 if (rts)
1819 mode |= RTS_ON;
1820 port->lineCtrl = mode;
1821 moxafunc(port->tableAddr, FC_LineControl, mode);
1822}
1823
1824static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
1825 int txflow, int rxflow, int txany)
1826{
1827 int mode = 0;
1828
1829 if (rts)
1830 mode |= RTS_FlowCtl;
1831 if (cts)
1832 mode |= CTS_FlowCtl;
1833 if (txflow)
1834 mode |= Tx_FlowCtl;
1835 if (rxflow)
1836 mode |= Rx_FlowCtl;
1837 if (txany)
1838 mode |= IXM_IXANY;
1839 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
1840}
1841
1842static int MoxaPortLineStatus(struct moxa_port *port)
1843{
1844 void __iomem *ofsAddr;
1845 int val;
1846
1847 ofsAddr = port->tableAddr;
1848 if (MOXA_IS_320(port->board))
1849 val = moxafuncret(ofsAddr, FC_LineStatus, 0);
1850 else
1851 val = readw(ofsAddr + FlagStat) >> 4;
1852 val &= 0x0B;
1853 if (val & 8)
1854 val |= 4;
1855 moxa_new_dcdstate(port, val & 8);
1856 val &= 7;
1857 return val;
1858}
1859
1860static int MoxaPortWriteData(struct tty_struct *tty,
1861 const unsigned char *buffer, int len)
1862{
1863 struct moxa_port *port = tty->driver_data;
1864 void __iomem *baseAddr, *ofsAddr, *ofs;
1865 unsigned int c, total;
1866 u16 head, tail, tx_mask, spage, epage;
1867 u16 pageno, pageofs, bufhead;
1868
1869 ofsAddr = port->tableAddr;
1870 baseAddr = port->board->basemem;
1871 tx_mask = readw(ofsAddr + TX_mask);
1872 spage = readw(ofsAddr + Page_txb);
1873 epage = readw(ofsAddr + EndPage_txb);
1874 tail = readw(ofsAddr + TXwptr);
1875 head = readw(ofsAddr + TXrptr);
1876 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
1877 if (c > len)
1878 c = len;
1879 moxaLog.txcnt[port->port.tty->index] += c;
1880 total = c;
1881 if (spage == epage) {
1882 bufhead = readw(ofsAddr + Ofs_txb);
1883 writew(spage, baseAddr + Control_reg);
1884 while (c > 0) {
1885 if (head > tail)
1886 len = head - tail - 1;
1887 else
1888 len = tx_mask + 1 - tail;
1889 len = (c > len) ? len : c;
1890 ofs = baseAddr + DynPage_addr + bufhead + tail;
1891 memcpy_toio(ofs, buffer, len);
1892 buffer += len;
1893 tail = (tail + len) & tx_mask;
1894 c -= len;
1895 }
1896 } else {
1897 pageno = spage + (tail >> 13);
1898 pageofs = tail & Page_mask;
1899 while (c > 0) {
1900 len = Page_size - pageofs;
1901 if (len > c)
1902 len = c;
1903 writeb(pageno, baseAddr + Control_reg);
1904 ofs = baseAddr + DynPage_addr + pageofs;
1905 memcpy_toio(ofs, buffer, len);
1906 buffer += len;
1907 if (++pageno == epage)
1908 pageno = spage;
1909 pageofs = 0;
1910 c -= len;
1911 }
1912 tail = (tail + total) & tx_mask;
1913 }
1914 writew(tail, ofsAddr + TXwptr);
1915 writeb(1, ofsAddr + CD180TXirq); /* start to send */
1916 return total;
1917}
1918
1919static int MoxaPortReadData(struct moxa_port *port)
1920{
1921 struct tty_struct *tty = port->port.tty;
1922 unsigned char *dst;
1923 void __iomem *baseAddr, *ofsAddr, *ofs;
1924 unsigned int count, len, total;
1925 u16 tail, rx_mask, spage, epage;
1926 u16 pageno, pageofs, bufhead, head;
1927
1928 ofsAddr = port->tableAddr;
1929 baseAddr = port->board->basemem;
1930 head = readw(ofsAddr + RXrptr);
1931 tail = readw(ofsAddr + RXwptr);
1932 rx_mask = readw(ofsAddr + RX_mask);
1933 spage = readw(ofsAddr + Page_rxb);
1934 epage = readw(ofsAddr + EndPage_rxb);
1935 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
1936 if (count == 0)
1937 return 0;
1938
1939 total = count;
1940 moxaLog.rxcnt[tty->index] += total;
1941 if (spage == epage) {
1942 bufhead = readw(ofsAddr + Ofs_rxb);
1943 writew(spage, baseAddr + Control_reg);
1944 while (count > 0) {
1945 ofs = baseAddr + DynPage_addr + bufhead + head;
1946 len = (tail >= head) ? (tail - head) :
1947 (rx_mask + 1 - head);
1948 len = tty_prepare_flip_string(tty, &dst,
1949 min(len, count));
1950 memcpy_fromio(dst, ofs, len);
1951 head = (head + len) & rx_mask;
1952 count -= len;
1953 }
1954 } else {
1955 pageno = spage + (head >> 13);
1956 pageofs = head & Page_mask;
1957 while (count > 0) {
1958 writew(pageno, baseAddr + Control_reg);
1959 ofs = baseAddr + DynPage_addr + pageofs;
1960 len = tty_prepare_flip_string(tty, &dst,
1961 min(Page_size - pageofs, count));
1962 memcpy_fromio(dst, ofs, len);
1963
1964 count -= len;
1965 pageofs = (pageofs + len) & Page_mask;
1966 if (pageofs == 0 && ++pageno == epage)
1967 pageno = spage;
1968 }
1969 head = (head + total) & rx_mask;
1970 }
1971 writew(head, ofsAddr + RXrptr);
1972 if (readb(ofsAddr + FlagStat) & Xoff_state) {
1973 moxaLowWaterChk = 1;
1974 port->lowChkFlag = 1;
1975 }
1976 return total;
1977}
1978
1979
1980static int MoxaPortTxQueue(struct moxa_port *port)
1981{
1982 void __iomem *ofsAddr = port->tableAddr;
1983 u16 rptr, wptr, mask;
1984
1985 rptr = readw(ofsAddr + TXrptr);
1986 wptr = readw(ofsAddr + TXwptr);
1987 mask = readw(ofsAddr + TX_mask);
1988 return (wptr - rptr) & mask;
1989}
1990
1991static int MoxaPortTxFree(struct moxa_port *port)
1992{
1993 void __iomem *ofsAddr = port->tableAddr;
1994 u16 rptr, wptr, mask;
1995
1996 rptr = readw(ofsAddr + TXrptr);
1997 wptr = readw(ofsAddr + TXwptr);
1998 mask = readw(ofsAddr + TX_mask);
1999 return mask - ((wptr - rptr) & mask);
2000}
2001
2002static int MoxaPortRxQueue(struct moxa_port *port)
2003{
2004 void __iomem *ofsAddr = port->tableAddr;
2005 u16 rptr, wptr, mask;
2006
2007 rptr = readw(ofsAddr + RXrptr);
2008 wptr = readw(ofsAddr + RXwptr);
2009 mask = readw(ofsAddr + RX_mask);
2010 return (wptr - rptr) & mask;
2011}
2012
2013static void MoxaPortTxDisable(struct moxa_port *port)
2014{
2015 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
2016}
2017
2018static void MoxaPortTxEnable(struct moxa_port *port)
2019{
2020 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
2021}
2022
2023static int moxa_get_serial_info(struct moxa_port *info,
2024 struct serial_struct __user *retinfo)
2025{
2026 struct serial_struct tmp = {
2027 .type = info->type,
2028 .line = info->port.tty->index,
2029 .flags = info->port.flags,
2030 .baud_base = 921600,
2031 .close_delay = info->port.close_delay
2032 };
2033 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
2034}
2035
2036
2037static int moxa_set_serial_info(struct moxa_port *info,
2038 struct serial_struct __user *new_info)
2039{
2040 struct serial_struct new_serial;
2041
2042 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2043 return -EFAULT;
2044
2045 if (new_serial.irq != 0 || new_serial.port != 0 ||
2046 new_serial.custom_divisor != 0 ||
2047 new_serial.baud_base != 921600)
2048 return -EPERM;
2049
2050 if (!capable(CAP_SYS_ADMIN)) {
2051 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
2052 (info->port.flags & ~ASYNC_USR_MASK)))
2053 return -EPERM;
2054 } else
2055 info->port.close_delay = new_serial.close_delay * HZ / 100;
2056
2057 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
2058 new_serial.flags |= (info->port.flags & ASYNC_FLAGS);
2059
2060 MoxaSetFifo(info, new_serial.type == PORT_16550A);
2061
2062 info->type = new_serial.type;
2063 return 0;
2064}
2065
2066
2067
2068/*****************************************************************************
2069 * Static local functions: *
2070 *****************************************************************************/
2071
2072static void MoxaSetFifo(struct moxa_port *port, int enable)
2073{
2074 void __iomem *ofsAddr = port->tableAddr;
2075
2076 if (!enable) {
2077 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2078 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2079 } else {
2080 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2081 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
2082 }
2083}