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Char: moxa, rework open/close
[linux-2.6-block.git] / drivers / char / moxa.c
CommitLineData
1da177e4
LT		 1/*****************************************************************************/
2/*
3 * moxa.c -- MOXA Intellio family multiport serial driver.
4 *
5 * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com.tw).
6 *
7 * This code is loosely based on the Linux serial driver, written by
8 * Linus Torvalds, Theodore T'so and others.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
1da177e4
LT		 14 */
15
16/*
17 * MOXA Intellio Series Driver
18 * for : LINUX
19 * date : 1999/1/7
20 * version : 5.1
21 */
22
1da177e4
LT		 23#include <linux/module.h>
24#include <linux/types.h>
25#include <linux/mm.h>
26#include <linux/ioport.h>
27#include <linux/errno.h>
03718234 28#include <linux/firmware.h>
1da177e4
LT		 29#include <linux/signal.h>
30#include <linux/sched.h>
31#include <linux/timer.h>
32#include <linux/interrupt.h>
33#include <linux/tty.h>
34#include <linux/tty_flip.h>
35#include <linux/major.h>
36#include <linux/string.h>
37#include <linux/fcntl.h>
38#include <linux/ptrace.h>
39#include <linux/serial.h>
40#include <linux/tty_driver.h>
41#include <linux/delay.h>
42#include <linux/pci.h>
43#include <linux/init.h>
44#include <linux/bitops.h>
45
46#include <asm/system.h>
47#include <asm/io.h>
48#include <asm/uaccess.h>
49
03718234
JS		 50#include "moxa.h"
51
11324edd 52#define MOXA_VERSION "5.1k"
1da177e4 53
03718234
JS		 54#define MOXA_FW_HDRLEN 32
55
11324edd
JS		 56#define MOXAMAJOR 172
57#define MOXACUMAJOR 173
1da177e4 58
11324edd 59#define MAX_BOARDS 4 /* Don't change this value */
1da177e4 60#define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
11324edd 61#define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
1da177e4
LT		 62
63/*
64 * Define the Moxa PCI vendor and device IDs.
65 */
11324edd
JS		 66#define MOXA_BUS_TYPE_ISA 0
67#define MOXA_BUS_TYPE_PCI 1
1da177e4 68
1da177e4
LT		 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 struct pci_device_id moxa_pcibrds[] = {
5ebb4078
JS		 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 },
1da177e4
LT		 94 { 0 }
95};
96MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
97#endif /* CONFIG_PCI */
98
03718234
JS		 99struct moxa_port;
100
8f8ecbad 101static struct moxa_board_conf {
1da177e4
LT		 102 int boardType;
103 int numPorts;
1da177e4 104 int busType;
8f8ecbad 105
810ab09b 106 unsigned int ready;
8f8ecbad 107
03718234
JS		 108 struct moxa_port *ports;
109
8f8ecbad
JS		 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;
9dff89cd 122};
1da177e4 123
8f8ecbad
JS		 124struct moxaq_str {
125 int inq;
126 int outq;
127};
1da177e4 128
8f8ecbad 129struct moxa_port {
b4173f45 130 struct moxa_board_conf *board;
7bcf97d1
JS		 131 struct tty_struct *tty;
132 void __iomem *tableAddr;
133
1da177e4 134 int type;
1da177e4 135 int close_delay;
a8f5cda0 136 unsigned int count;
1da177e4 137 int asyncflags;
1da177e4 138 int cflag;
7bcf97d1 139 unsigned long statusflags;
1da177e4 140 wait_queue_head_t open_wait;
1da177e4 141
7bcf97d1
JS		 142 u8 DCDState;
143 u8 lineCtrl;
144 u8 lowChkFlag;
8f8ecbad 145};
1da177e4 146
74d7d97b
JS		 147struct mon_str {
148 int tick;
149 int rxcnt[MAX_PORTS];
150 int txcnt[MAX_PORTS];
151};
152
1da177e4
LT		 153/* statusflags */
154#define TXSTOPPED 0x1
155#define LOWWAIT 0x2
156#define EMPTYWAIT 0x4
157#define THROTTLE 0x8
158
1da177e4
LT		 159#define SERIAL_DO_RESTART
160
1da177e4
LT		 161#define WAKEUP_CHARS 256
162
1da177e4 163static int ttymajor = MOXAMAJOR;
74d7d97b
JS		 164static struct mon_str moxaLog;
165static unsigned int moxaFuncTout = HZ / 2;
7bcf97d1 166static unsigned int moxaLowWaterChk;
a8f5cda0 167static DEFINE_MUTEX(moxa_openlock);
1da177e4
LT		 168/* Variables for insmod */
169#ifdef MODULE
d353eca4
JS		 170static unsigned long baseaddr[MAX_BOARDS];
171static unsigned int type[MAX_BOARDS];
172static unsigned int numports[MAX_BOARDS];
1da177e4
LT		 173#endif
174
175MODULE_AUTHOR("William Chen");
176MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
177MODULE_LICENSE("GPL");
178#ifdef MODULE
d353eca4
JS		 179module_param_array(type, uint, NULL, 0);
180MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
181module_param_array(baseaddr, ulong, NULL, 0);
182MODULE_PARM_DESC(baseaddr, "base address");
183module_param_array(numports, uint, NULL, 0);
184MODULE_PARM_DESC(numports, "numports (ignored for C218)");
1da177e4
LT		 185#endif
186module_param(ttymajor, int, 0);
1da177e4 187
1da177e4
LT		 188/*
189 * static functions:
190 */
1da177e4
LT		 191static int moxa_open(struct tty_struct *, struct file *);
192static void moxa_close(struct tty_struct *, struct file *);
193static int moxa_write(struct tty_struct *, const unsigned char *, int);
194static int moxa_write_room(struct tty_struct *);
195static void moxa_flush_buffer(struct tty_struct *);
196static int moxa_chars_in_buffer(struct tty_struct *);
197static void moxa_flush_chars(struct tty_struct *);
198static void moxa_put_char(struct tty_struct *, unsigned char);
1da177e4
LT		 199static void moxa_throttle(struct tty_struct *);
200static void moxa_unthrottle(struct tty_struct *);
606d099c 201static void moxa_set_termios(struct tty_struct *, struct ktermios *);
1da177e4
LT		 202static void moxa_stop(struct tty_struct *);
203static void moxa_start(struct tty_struct *);
204static void moxa_hangup(struct tty_struct *);
205static int moxa_tiocmget(struct tty_struct *tty, struct file *file);
206static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
207 unsigned int set, unsigned int clear);
208static void moxa_poll(unsigned long);
db1acaa6 209static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
6f56b658 210static void moxa_setup_empty_event(struct tty_struct *);
6f56b658 211static void moxa_shut_down(struct moxa_port *);
1da177e4
LT		 212/*
213 * moxa board interface functions:
214 */
b4173f45
JS		 215static void MoxaPortEnable(struct moxa_port *);
216static void MoxaPortDisable(struct moxa_port *);
217static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
218static int MoxaPortGetLineOut(struct moxa_port *, int *, int *);
219static void MoxaPortLineCtrl(struct moxa_port *, int, int);
220static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
221static int MoxaPortLineStatus(struct moxa_port *);
b4173f45 222static void MoxaPortFlushData(struct moxa_port *, int);
2108eba5 223static int MoxaPortWriteData(struct moxa_port *, const unsigned char *, int);
7bcf97d1 224static int MoxaPortReadData(struct moxa_port *);
b4173f45
JS		 225static int MoxaPortTxQueue(struct moxa_port *);
226static int MoxaPortRxQueue(struct moxa_port *);
227static int MoxaPortTxFree(struct moxa_port *);
228static void MoxaPortTxDisable(struct moxa_port *);
229static void MoxaPortTxEnable(struct moxa_port *);
8f8ecbad
JS		 230static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *);
231static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *);
b4173f45 232static void MoxaSetFifo(struct moxa_port *port, int enable);
1da177e4 233
74d7d97b
JS		 234/*
235 * I/O functions
236 */
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 && printk_ratelimit())
246 printk(KERN_WARNING "moxa function expired\n");
247}
248
249static void moxafunc(void __iomem *ofsAddr, int cmd, ushort arg)
250{
251 writew(arg, ofsAddr + FuncArg);
252 writew(cmd, ofsAddr + FuncCode);
253 moxa_wait_finish(ofsAddr);
254}
255
7bcf97d1
JS		 256static void moxa_low_water_check(void __iomem *ofsAddr)
257{
258 u16 rptr, wptr, mask, len;
259
260 if (readb(ofsAddr + FlagStat) & Xoff_state) {
261 rptr = readw(ofsAddr + RXrptr);
262 wptr = readw(ofsAddr + RXwptr);
263 mask = readw(ofsAddr + RX_mask);
264 len = (wptr - rptr) & mask;
265 if (len <= Low_water)
266 moxafunc(ofsAddr, FC_SendXon, 0);
267 }
268}
269
74d7d97b
JS		 270/*
271 * TTY operations
272 */
273
274static int moxa_ioctl(struct tty_struct *tty, struct file *file,
275 unsigned int cmd, unsigned long arg)
276{
277 struct moxa_port *ch = tty->driver_data;
278 void __user *argp = (void __user *)arg;
a8f5cda0 279 int status, ret = 0;
74d7d97b
JS		 280
281 if (tty->index == MAX_PORTS) {
282 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
283 cmd != MOXA_GETMSTATUS)
284 return -EINVAL;
285 } else if (!ch)
286 return -ENODEV;
287
288 switch (cmd) {
289 case MOXA_GETDATACOUNT:
290 moxaLog.tick = jiffies;
a8f5cda0
JS		 291 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
292 ret = -EFAULT;
293 break;
74d7d97b
JS		 294 case MOXA_FLUSH_QUEUE:
295 MoxaPortFlushData(ch, arg);
a8f5cda0 296 break;
74d7d97b
JS		 297 case MOXA_GET_IOQUEUE: {
298 struct moxaq_str __user *argm = argp;
299 struct moxaq_str tmp;
300 struct moxa_port *p;
301 unsigned int i, j;
302
a8f5cda0 303 mutex_lock(&moxa_openlock);
74d7d97b
JS		 304 for (i = 0; i < MAX_BOARDS; i++) {
305 p = moxa_boards[i].ports;
306 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
307 memset(&tmp, 0, sizeof(tmp));
308 if (moxa_boards[i].ready) {
309 tmp.inq = MoxaPortRxQueue(p);
310 tmp.outq = MoxaPortTxQueue(p);
311 }
a8f5cda0
JS		 312 if (copy_to_user(argm, &tmp, sizeof(tmp))) {
313 mutex_unlock(&moxa_openlock);
74d7d97b 314 return -EFAULT;
a8f5cda0 315 }
74d7d97b
JS		 316 }
317 }
a8f5cda0
JS		 318 mutex_unlock(&moxa_openlock);
319 break;
74d7d97b
JS		 320 } case MOXA_GET_OQUEUE:
321 status = MoxaPortTxQueue(ch);
a8f5cda0
JS		 322 ret = put_user(status, (unsigned long __user *)argp);
323 break;
74d7d97b
JS		 324 case MOXA_GET_IQUEUE:
325 status = MoxaPortRxQueue(ch);
a8f5cda0
JS		 326 ret = put_user(status, (unsigned long __user *)argp);
327 break;
74d7d97b
JS		 328 case MOXA_GETMSTATUS: {
329 struct mxser_mstatus __user *argm = argp;
330 struct mxser_mstatus tmp;
331 struct moxa_port *p;
332 unsigned int i, j;
333
a8f5cda0 334 mutex_lock(&moxa_openlock);
74d7d97b
JS		 335 for (i = 0; i < MAX_BOARDS; i++) {
336 p = moxa_boards[i].ports;
337 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
338 memset(&tmp, 0, sizeof(tmp));
339 if (!moxa_boards[i].ready)
340 goto copy;
341
342 status = MoxaPortLineStatus(p);
343 if (status & 1)
344 tmp.cts = 1;
345 if (status & 2)
346 tmp.dsr = 1;
347 if (status & 4)
348 tmp.dcd = 1;
349
350 if (!p->tty || !p->tty->termios)
351 tmp.cflag = p->cflag;
352 else
353 tmp.cflag = p->tty->termios->c_cflag;
354copy:
a8f5cda0
JS		 355 if (copy_to_user(argm, &tmp, sizeof(tmp))) {
356 mutex_unlock(&moxa_openlock);
74d7d97b 357 return -EFAULT;
a8f5cda0 358 }
74d7d97b
JS		 359 }
360 }
a8f5cda0
JS		 361 mutex_unlock(&moxa_openlock);
362 break;
74d7d97b
JS		 363 }
364 case TIOCGSERIAL:
a8f5cda0
JS		 365 mutex_lock(&moxa_openlock);
366 ret = moxa_get_serial_info(ch, argp);
367 mutex_unlock(&moxa_openlock);
368 break;
74d7d97b 369 case TIOCSSERIAL:
a8f5cda0
JS		 370 mutex_lock(&moxa_openlock);
371 ret = moxa_set_serial_info(ch, argp);
372 mutex_unlock(&moxa_openlock);
373 break;
374 default:
375 ret = -ENOIOCTLCMD;
74d7d97b 376 }
a8f5cda0 377 return ret;
74d7d97b
JS		 378}
379
380static void moxa_break_ctl(struct tty_struct *tty, int state)
381{
382 struct moxa_port *port = tty->driver_data;
383
384 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
385 Magic_code);
386}
387
b68e31d0 388static const struct tty_operations moxa_ops = {
1da177e4
LT		 389 .open = moxa_open,
390 .close = moxa_close,
391 .write = moxa_write,
392 .write_room = moxa_write_room,
393 .flush_buffer = moxa_flush_buffer,
394 .chars_in_buffer = moxa_chars_in_buffer,
395 .flush_chars = moxa_flush_chars,
396 .put_char = moxa_put_char,
397 .ioctl = moxa_ioctl,
398 .throttle = moxa_throttle,
399 .unthrottle = moxa_unthrottle,
400 .set_termios = moxa_set_termios,
401 .stop = moxa_stop,
402 .start = moxa_start,
403 .hangup = moxa_hangup,
74d7d97b 404 .break_ctl = moxa_break_ctl,
1da177e4
LT		 405 .tiocmget = moxa_tiocmget,
406 .tiocmset = moxa_tiocmset,
407};
408
aa7e5221 409static struct tty_driver *moxaDriver;
aa7e5221 410static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
34af946a 411static DEFINE_SPINLOCK(moxa_lock);
33f0f88f 412
74d7d97b
JS		 413/*
414 * HW init
415 */
416
03718234
JS		 417static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
418{
419 switch (brd->boardType) {
420 case MOXA_BOARD_C218_ISA:
421 case MOXA_BOARD_C218_PCI:
422 if (model != 1)
423 goto err;
424 break;
425 case MOXA_BOARD_CP204J:
426 if (model != 3)
427 goto err;
428 break;
429 default:
430 if (model != 2)
431 goto err;
432 break;
433 }
434 return 0;
435err:
436 return -EINVAL;
437}
438
439static int moxa_check_fw(const void *ptr)
440{
441 const __le16 *lptr = ptr;
442
443 if (*lptr != cpu_to_le16(0x7980))
444 return -EINVAL;
445
446 return 0;
447}
448
449static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
450 size_t len)
451{
452 void __iomem *baseAddr = brd->basemem;
453 u16 tmp;
454
455 writeb(HW_reset, baseAddr + Control_reg); /* reset */
456 msleep(10);
457 memset_io(baseAddr, 0, 4096);
458 memcpy_toio(baseAddr, buf, len); /* download BIOS */
459 writeb(0, baseAddr + Control_reg); /* restart */
460
461 msleep(2000);
462
463 switch (brd->boardType) {
464 case MOXA_BOARD_C218_ISA:
465 case MOXA_BOARD_C218_PCI:
466 tmp = readw(baseAddr + C218_key);
467 if (tmp != C218_KeyCode)
468 goto err;
469 break;
470 case MOXA_BOARD_CP204J:
471 tmp = readw(baseAddr + C218_key);
472 if (tmp != CP204J_KeyCode)
473 goto err;
474 break;
475 default:
476 tmp = readw(baseAddr + C320_key);
477 if (tmp != C320_KeyCode)
478 goto err;
479 tmp = readw(baseAddr + C320_status);
480 if (tmp != STS_init) {
481 printk(KERN_ERR "moxa: bios upload failed -- CPU/Basic "
482 "module not found\n");
483 return -EIO;
484 }
485 break;
486 }
487
488 return 0;
489err:
490 printk(KERN_ERR "moxa: bios upload failed -- board not found\n");
491 return -EIO;
492}
493
494static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
495 size_t len)
496{
497 void __iomem *baseAddr = brd->basemem;
498
499 if (len < 7168) {
500 printk(KERN_ERR "moxa: invalid 320 bios -- too short\n");
501 return -EINVAL;
502 }
503
504 writew(len - 7168 - 2, baseAddr + C320bapi_len);
505 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
506 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
507 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
508 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
509
510 return 0;
511}
512
5292bcd3 513static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
03718234
JS		 514 size_t len)
515{
516 void __iomem *baseAddr = brd->basemem;
517 const u16 *uptr = ptr;
518 size_t wlen, len2, j;
5292bcd3
JS		 519 unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
520 unsigned int i, retry, c320;
03718234
JS		 521 u16 usum, keycode;
522
5292bcd3
JS		 523 c320 = brd->boardType == MOXA_BOARD_C320_PCI ||
524 brd->boardType == MOXA_BOARD_C320_ISA;
525 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
526 C218_KeyCode;
03718234 527
5292bcd3
JS		 528 switch (brd->boardType) {
529 case MOXA_BOARD_CP204J:
530 case MOXA_BOARD_C218_ISA:
531 case MOXA_BOARD_C218_PCI:
532 key = C218_key;
533 loadbuf = C218_LoadBuf;
534 loadlen = C218DLoad_len;
535 checksum = C218check_sum;
536 checksum_ok = C218chksum_ok;
537 break;
538 default:
539 key = C320_key;
540 keycode = C320_KeyCode;
541 loadbuf = C320_LoadBuf;
542 loadlen = C320DLoad_len;
543 checksum = C320check_sum;
544 checksum_ok = C320chksum_ok;
545 break;
03718234 546 }
03718234
JS		 547
548 usum = 0;
549 wlen = len >> 1;
550 for (i = 0; i < wlen; i++)
551 usum += le16_to_cpu(uptr[i]);
552 retry = 0;
553 do {
554 wlen = len >> 1;
555 j = 0;
556 while (wlen) {
557 len2 = (wlen > 2048) ? 2048 : wlen;
558 wlen -= len2;
5292bcd3 559 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
03718234 560 j += len2 << 1;
5292bcd3
JS		 561
562 writew(len2, baseAddr + loadlen);
563 writew(0, baseAddr + key);
564 for (i = 0; i < 100; i++) {
565 if (readw(baseAddr + key) == keycode)
03718234
JS		 566 break;
567 msleep(10);
568 }
5292bcd3 569 if (readw(baseAddr + key) != keycode)
03718234
JS		 570 return -EIO;
571 }
5292bcd3
JS		 572 writew(0, baseAddr + loadlen);
573 writew(usum, baseAddr + checksum);
574 writew(0, baseAddr + key);
575 for (i = 0; i < 100; i++) {
576 if (readw(baseAddr + key) == keycode)
03718234
JS		 577 break;
578 msleep(10);
579 }
580 retry++;
5292bcd3
JS		 581 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
582 if (readb(baseAddr + checksum_ok) != 1)
03718234
JS		 583 return -EIO;
584
5292bcd3 585 writew(0, baseAddr + key);
03718234
JS		 586 for (i = 0; i < 600; i++) {
587 if (readw(baseAddr + Magic_no) == Magic_code)
588 break;
589 msleep(10);
590 }
591 if (readw(baseAddr + Magic_no) != Magic_code)
592 return -EIO;
593
5292bcd3
JS		 594 if (c320) {
595 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
596 writew(0x3800, baseAddr + TMS320_PORT1);
597 writew(0x3900, baseAddr + TMS320_PORT2);
598 writew(28499, baseAddr + TMS320_CLOCK);
599 } else {
600 writew(0x3200, baseAddr + TMS320_PORT1);
601 writew(0x3400, baseAddr + TMS320_PORT2);
602 writew(19999, baseAddr + TMS320_CLOCK);
603 }
03718234
JS		 604 }
605 writew(1, baseAddr + Disable_IRQ);
606 writew(0, baseAddr + Magic_no);
607 for (i = 0; i < 500; i++) {
608 if (readw(baseAddr + Magic_no) == Magic_code)
609 break;
610 msleep(10);
611 }
612 if (readw(baseAddr + Magic_no) != Magic_code)
613 return -EIO;
614
5292bcd3
JS		 615 if (c320) {
616 j = readw(baseAddr + Module_cnt);
617 if (j <= 0)
618 return -EIO;
619 brd->numPorts = j * 8;
620 writew(j, baseAddr + Module_no);
621 writew(0, baseAddr + Magic_no);
622 for (i = 0; i < 600; i++) {
623 if (readw(baseAddr + Magic_no) == Magic_code)
624 break;
625 msleep(10);
626 }
627 if (readw(baseAddr + Magic_no) != Magic_code)
628 return -EIO;
03718234 629 }
03718234
JS		 630 brd->intNdx = baseAddr + IRQindex;
631 brd->intPend = baseAddr + IRQpending;
632 brd->intTable = baseAddr + IRQtable;
633
634 return 0;
635}
636
637static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
638 size_t len)
639{
640 void __iomem *ofsAddr, *baseAddr = brd->basemem;
641 struct moxa_port *port;
642 int retval, i;
643
644 if (len % 2) {
5292bcd3 645 printk(KERN_ERR "moxa: bios length is not even\n");
03718234
JS		 646 return -EINVAL;
647 }
648
5292bcd3
JS		 649 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
650 if (retval)
651 return retval;
652
03718234
JS		 653 switch (brd->boardType) {
654 case MOXA_BOARD_C218_ISA:
655 case MOXA_BOARD_C218_PCI:
656 case MOXA_BOARD_CP204J:
03718234
JS		 657 port = brd->ports;
658 for (i = 0; i < brd->numPorts; i++, port++) {
b4173f45 659 port->board = brd;
03718234
JS		 660 port->DCDState = 0;
661 port->tableAddr = baseAddr + Extern_table +
662 Extern_size * i;
663 ofsAddr = port->tableAddr;
664 writew(C218rx_mask, ofsAddr + RX_mask);
665 writew(C218tx_mask, ofsAddr + TX_mask);
666 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
667 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
668
669 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
670 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
671
672 }
673 break;
674 default:
03718234
JS		 675 port = brd->ports;
676 for (i = 0; i < brd->numPorts; i++, port++) {
b4173f45 677 port->board = brd;
03718234
JS		 678 port->DCDState = 0;
679 port->tableAddr = baseAddr + Extern_table +
680 Extern_size * i;
681 ofsAddr = port->tableAddr;
682 switch (brd->numPorts) {
683 case 8:
684 writew(C320p8rx_mask, ofsAddr + RX_mask);
685 writew(C320p8tx_mask, ofsAddr + TX_mask);
686 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
687 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
688 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
689 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
690
691 break;
692 case 16:
693 writew(C320p16rx_mask, ofsAddr + RX_mask);
694 writew(C320p16tx_mask, ofsAddr + TX_mask);
695 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
696 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
697 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
698 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
699 break;
700
701 case 24:
702 writew(C320p24rx_mask, ofsAddr + RX_mask);
703 writew(C320p24tx_mask, ofsAddr + TX_mask);
704 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
705 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
706 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
707 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
708 break;
709 case 32:
710 writew(C320p32rx_mask, ofsAddr + RX_mask);
711 writew(C320p32tx_mask, ofsAddr + TX_mask);
712 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
713 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
714 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
715 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
716 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
717 break;
718 }
719 }
720 break;
721 }
03718234
JS		 722 return 0;
723}
724
725static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
726{
727 void *ptr = fw->data;
728 char rsn[64];
729 u16 lens[5];
730 size_t len;
731 unsigned int a, lenp, lencnt;
732 int ret = -EINVAL;
733 struct {
734 __le32 magic; /* 0x34303430 */
735 u8 reserved1[2];
736 u8 type; /* UNIX = 3 */
737 u8 model; /* C218T=1, C320T=2, CP204=3 */
738 u8 reserved2[8];
739 __le16 len[5];
740 } *hdr = ptr;
741
742 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
743
744 if (fw->size < MOXA_FW_HDRLEN) {
745 strcpy(rsn, "too short (even header won't fit)");
746 goto err;
747 }
748 if (hdr->magic != cpu_to_le32(0x30343034)) {
749 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
750 goto err;
751 }
752 if (hdr->type != 3) {
753 sprintf(rsn, "not for linux, type is %u", hdr->type);
754 goto err;
755 }
756 if (moxa_check_fw_model(brd, hdr->model)) {
757 sprintf(rsn, "not for this card, model is %u", hdr->model);
758 goto err;
759 }
760
761 len = MOXA_FW_HDRLEN;
762 lencnt = hdr->model == 2 ? 5 : 3;
763 for (a = 0; a < ARRAY_SIZE(lens); a++) {
764 lens[a] = le16_to_cpu(hdr->len[a]);
765 if (lens[a] && len + lens[a] <= fw->size &&
766 moxa_check_fw(&fw->data[len]))
767 printk(KERN_WARNING "moxa firmware: unexpected input "
768 "at offset %u, but going on\n", (u32)len);
769 if (!lens[a] && a < lencnt) {
770 sprintf(rsn, "too few entries in fw file");
771 goto err;
772 }
773 len += lens[a];
774 }
775
776 if (len != fw->size) {
777 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
778 (u32)len);
779 goto err;
780 }
781
782 ptr += MOXA_FW_HDRLEN;
783 lenp = 0; /* bios */
784
785 strcpy(rsn, "read above");
786
787 ret = moxa_load_bios(brd, ptr, lens[lenp]);
788 if (ret)
789 goto err;
790
791 /* we skip the tty section (lens[1]), since we don't need it */
792 ptr += lens[lenp] + lens[lenp + 1];
793 lenp += 2; /* comm */
794
795 if (hdr->model == 2) {
796 ret = moxa_load_320b(brd, ptr, lens[lenp]);
797 if (ret)
798 goto err;
799 /* skip another tty */
800 ptr += lens[lenp] + lens[lenp + 1];
801 lenp += 2;
802 }
803
804 ret = moxa_load_code(brd, ptr, lens[lenp]);
805 if (ret)
806 goto err;
807
808 return 0;
809err:
810 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
811 return ret;
812}
813
814static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
815{
816 const struct firmware *fw;
817 const char *file;
810ab09b
JS		 818 struct moxa_port *p;
819 unsigned int i;
03718234
JS		 820 int ret;
821
810ab09b
JS		 822 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
823 GFP_KERNEL);
824 if (brd->ports == NULL) {
825 printk(KERN_ERR "cannot allocate memory for ports\n");
826 ret = -ENOMEM;
827 goto err;
828 }
829
830 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
831 p->type = PORT_16550A;
832 p->close_delay = 5 * HZ / 10;
833 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
834 init_waitqueue_head(&p->open_wait);
810ab09b
JS		 835 }
836
03718234
JS		 837 switch (brd->boardType) {
838 case MOXA_BOARD_C218_ISA:
839 case MOXA_BOARD_C218_PCI:
840 file = "c218tunx.cod";
841 break;
842 case MOXA_BOARD_CP204J:
843 file = "cp204unx.cod";
844 break;
845 default:
846 file = "c320tunx.cod";
847 break;
848 }
849
850 ret = request_firmware(&fw, file, dev);
851 if (ret) {
852 printk(KERN_ERR "request_firmware failed\n");
810ab09b 853 goto err_free;
03718234
JS		 854 }
855
856 ret = moxa_load_fw(brd, fw);
857
858 release_firmware(fw);
810ab09b
JS		 859
860 if (ret)
861 goto err_free;
862
2a541341 863 spin_lock_bh(&moxa_lock);
810ab09b 864 brd->ready = 1;
0bcc4caa
JS		 865 if (!timer_pending(&moxaTimer))
866 mod_timer(&moxaTimer, jiffies + HZ / 50);
2a541341 867 spin_unlock_bh(&moxa_lock);
0bcc4caa 868
810ab09b
JS		 869 return 0;
870err_free:
871 kfree(brd->ports);
872err:
03718234
JS		 873 return ret;
874}
875
810ab09b
JS		 876static void moxa_board_deinit(struct moxa_board_conf *brd)
877{
a8f5cda0
JS		 878 unsigned int a, opened;
879
880 mutex_lock(&moxa_openlock);
7bcf97d1 881 spin_lock_bh(&moxa_lock);
810ab09b 882 brd->ready = 0;
7bcf97d1 883 spin_unlock_bh(&moxa_lock);
a8f5cda0
JS		 884
885 /* pci hot-un-plug support */
886 for (a = 0; a < brd->numPorts; a++)
887 if (brd->ports[a].asyncflags & ASYNC_INITIALIZED)
888 tty_hangup(brd->ports[a].tty);
889 while (1) {
890 opened = 0;
891 for (a = 0; a < brd->numPorts; a++)
892 if (brd->ports[a].asyncflags & ASYNC_INITIALIZED)
893 opened++;
894 mutex_unlock(&moxa_openlock);
895 if (!opened)
896 break;
897 msleep(50);
898 mutex_lock(&moxa_openlock);
899 }
900
810ab09b
JS		 901 iounmap(brd->basemem);
902 brd->basemem = NULL;
903 kfree(brd->ports);
904}
905
1da177e4 906#ifdef CONFIG_PCI
9cde5bf0
JS		 907static int __devinit moxa_pci_probe(struct pci_dev *pdev,
908 const struct pci_device_id *ent)
1da177e4 909{
9cde5bf0
JS		 910 struct moxa_board_conf *board;
911 unsigned int i;
912 int board_type = ent->driver_data;
913 int retval;
914
915 retval = pci_enable_device(pdev);
7aeb95da
JS		 916 if (retval) {
917 dev_err(&pdev->dev, "can't enable pci device\n");
9cde5bf0 918 goto err;
7aeb95da 919 }
9cde5bf0
JS		 920
921 for (i = 0; i < MAX_BOARDS; i++)
922 if (moxa_boards[i].basemem == NULL)
923 break;
924
925 retval = -ENODEV;
926 if (i >= MAX_BOARDS) {
7aeb95da 927 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
9cde5bf0
JS		 928 "found. Board is ignored.\n", MAX_BOARDS);
929 goto err;
930 }
931
932 board = &moxa_boards[i];
e46a5e3f
JS		 933
934 retval = pci_request_region(pdev, 2, "moxa-base");
935 if (retval) {
936 dev_err(&pdev->dev, "can't request pci region 2\n");
937 goto err;
938 }
939
940 board->basemem = ioremap(pci_resource_start(pdev, 2), 0x4000);
7aeb95da
JS		 941 if (board->basemem == NULL) {
942 dev_err(&pdev->dev, "can't remap io space 2\n");
e46a5e3f 943 goto err_reg;
7aeb95da 944 }
9cde5bf0 945
1da177e4
LT		 946 board->boardType = board_type;
947 switch (board_type) {
948 case MOXA_BOARD_C218_ISA:
949 case MOXA_BOARD_C218_PCI:
950 board->numPorts = 8;
951 break;
952
953 case MOXA_BOARD_CP204J:
954 board->numPorts = 4;
955 break;
956 default:
957 board->numPorts = 0;
958 break;
959 }
960 board->busType = MOXA_BUS_TYPE_PCI;
a784bf7c 961
03718234
JS		 962 retval = moxa_init_board(board, &pdev->dev);
963 if (retval)
964 goto err_base;
965
9cde5bf0 966 pci_set_drvdata(pdev, board);
1da177e4
LT		 967
968 return (0);
03718234
JS		 969err_base:
970 iounmap(board->basemem);
971 board->basemem = NULL;
e46a5e3f
JS		 972err_reg:
973 pci_release_region(pdev, 2);
9cde5bf0
JS		 974err:
975 return retval;
976}
977
978static void __devexit moxa_pci_remove(struct pci_dev *pdev)
979{
980 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
981
810ab09b
JS		 982 moxa_board_deinit(brd);
983
e46a5e3f 984 pci_release_region(pdev, 2);
1da177e4 985}
a784bf7c
JS		 986
987static struct pci_driver moxa_pci_driver = {
988 .name = "moxa",
989 .id_table = moxa_pcibrds,
990 .probe = moxa_pci_probe,
991 .remove = __devexit_p(moxa_pci_remove)
992};
1da177e4
LT		 993#endif /* CONFIG_PCI */
994
995static int __init moxa_init(void)
996{
810ab09b 997 unsigned int isabrds = 0;
d353eca4 998 int retval = 0;
1da177e4 999
7aeb95da
JS		 1000 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
1001 MOXA_VERSION);
1da177e4
LT		 1002 moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
1003 if (!moxaDriver)
1004 return -ENOMEM;
1005
1da177e4 1006 moxaDriver->owner = THIS_MODULE;
9b4e3b13 1007 moxaDriver->name = "ttyMX";
1da177e4
LT		 1008 moxaDriver->major = ttymajor;
1009 moxaDriver->minor_start = 0;
1010 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
1011 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
1012 moxaDriver->init_termios = tty_std_termios;
1da177e4 1013 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
606d099c
AC		 1014 moxaDriver->init_termios.c_ispeed = 9600;
1015 moxaDriver->init_termios.c_ospeed = 9600;
1da177e4
LT		 1016 moxaDriver->flags = TTY_DRIVER_REAL_RAW;
1017 tty_set_operations(moxaDriver, &moxa_ops);
1018
7aeb95da 1019 pr_debug("Moxa tty devices major number = %d\n", ttymajor);
1da177e4
LT		 1020
1021 if (tty_register_driver(moxaDriver)) {
1022 printk(KERN_ERR "Couldn't install MOXA Smartio family driver !\n");
1023 put_tty_driver(moxaDriver);
1024 return -1;
1025 }
1da177e4 1026
d353eca4 1027 /* Find the boards defined from module args. */
1da177e4 1028#ifdef MODULE
d353eca4
JS		 1029 {
1030 struct moxa_board_conf *brd = moxa_boards;
810ab09b 1031 unsigned int i;
1da177e4 1032 for (i = 0; i < MAX_BOARDS; i++) {
d353eca4
JS		 1033 if (!baseaddr[i])
1034 break;
1035 if (type[i] == MOXA_BOARD_C218_ISA ||
1036 type[i] == MOXA_BOARD_C320_ISA) {
7aeb95da 1037 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
d353eca4
JS		 1038 isabrds + 1, moxa_brdname[type[i] - 1],
1039 baseaddr[i]);
1040 brd->boardType = type[i];
1041 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
1042 numports[i];
1043 brd->busType = MOXA_BUS_TYPE_ISA;
1044 brd->basemem = ioremap(baseaddr[i], 0x4000);
1045 if (!brd->basemem) {
1046 printk(KERN_ERR "moxa: can't remap %lx\n",
1047 baseaddr[i]);
1da177e4
LT		 1048 continue;
1049 }
03718234
JS		 1050 if (moxa_init_board(brd, NULL)) {
1051 iounmap(brd->basemem);
1052 brd->basemem = NULL;
1053 continue;
1054 }
d353eca4
JS		 1055
1056 brd++;
1057 isabrds++;
1da177e4
LT		 1058 }
1059 }
d353eca4 1060 }
1da177e4 1061#endif
a784bf7c 1062
1da177e4 1063#ifdef CONFIG_PCI
a784bf7c
JS		 1064 retval = pci_register_driver(&moxa_pci_driver);
1065 if (retval) {
1066 printk(KERN_ERR "Can't register moxa pci driver!\n");
d353eca4 1067 if (isabrds)
a784bf7c 1068 retval = 0;
1da177e4
LT		 1069 }
1070#endif
a784bf7c 1071
a784bf7c 1072 return retval;
1da177e4
LT		 1073}
1074
1075static void __exit moxa_exit(void)
1076{
1077 int i;
1078
9cde5bf0 1079#ifdef CONFIG_PCI
a784bf7c 1080 pci_unregister_driver(&moxa_pci_driver);
9cde5bf0 1081#endif
a784bf7c 1082
810ab09b
JS		 1083 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
1084 if (moxa_boards[i].ready)
1085 moxa_board_deinit(&moxa_boards[i]);
2a541341
JS		 1086
1087 del_timer_sync(&moxaTimer);
1088
1089 if (tty_unregister_driver(moxaDriver))
1090 printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
1091 "serial driver\n");
1092 put_tty_driver(moxaDriver);
1da177e4
LT		 1093}
1094
1095module_init(moxa_init);
1096module_exit(moxa_exit);
1097
a8f5cda0
JS		 1098static void moxa_close_port(struct moxa_port *ch)
1099{
1100 moxa_shut_down(ch);
1101 MoxaPortFlushData(ch, 2);
1102 ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE;
1103 ch->tty->driver_data = NULL;
1104 ch->tty = NULL;
1105}
1106
1107static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,
1108 struct moxa_port *ch)
1109{
1110 DEFINE_WAIT(wait);
1111 int retval = 0;
1112 u8 dcd;
1113
1114 while (1) {
1115 prepare_to_wait(&ch->open_wait, &wait, TASK_INTERRUPTIBLE);
1116 if (tty_hung_up_p(filp)) {
1117#ifdef SERIAL_DO_RESTART
1118 retval = -ERESTARTSYS;
1119#else
1120 retval = -EAGAIN;
1121#endif
1122 break;
1123 }
1124 spin_lock_bh(&moxa_lock);
1125 dcd = ch->DCDState;
1126 spin_unlock_bh(&moxa_lock);
1127 if (dcd)
1128 break;
1129
1130 if (signal_pending(current)) {
1131 retval = -ERESTARTSYS;
1132 break;
1133 }
1134 schedule();
1135 }
1136 finish_wait(&ch->open_wait, &wait);
1137
1138 return retval;
1139}
1140
1da177e4
LT		 1141static int moxa_open(struct tty_struct *tty, struct file *filp)
1142{
810ab09b 1143 struct moxa_board_conf *brd;
8f8ecbad 1144 struct moxa_port *ch;
1da177e4
LT		 1145 int port;
1146 int retval;
1da177e4 1147
11324edd 1148 port = tty->index;
1da177e4 1149 if (port == MAX_PORTS) {
74d7d97b 1150 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
1da177e4 1151 }
a8f5cda0
JS		 1152 if (mutex_lock_interruptible(&moxa_openlock))
1153 return -ERESTARTSYS;
810ab09b 1154 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
a8f5cda0
JS		 1155 if (!brd->ready) {
1156 mutex_unlock(&moxa_openlock);
810ab09b 1157 return -ENODEV;
a8f5cda0 1158 }
1da177e4 1159
810ab09b 1160 ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
1da177e4
LT		 1161 ch->count++;
1162 tty->driver_data = ch;
1163 ch->tty = tty;
1164 if (!(ch->asyncflags & ASYNC_INITIALIZED)) {
1165 ch->statusflags = 0;
db1acaa6 1166 moxa_set_tty_param(tty, tty->termios);
b4173f45
JS		 1167 MoxaPortLineCtrl(ch, 1, 1);
1168 MoxaPortEnable(ch);
a8f5cda0 1169 MoxaSetFifo(ch, ch->type == PORT_16550A);
1da177e4
LT		 1170 ch->asyncflags |= ASYNC_INITIALIZED;
1171 }
a8f5cda0 1172 mutex_unlock(&moxa_openlock);
1da177e4 1173
a8f5cda0
JS		 1174 retval = 0;
1175 if (!(filp->f_flags & O_NONBLOCK) && !C_CLOCAL(tty))
1176 retval = moxa_block_till_ready(tty, filp, ch);
1177 mutex_lock(&moxa_openlock);
1178 if (retval) {
1179 if (ch->count) /* 0 means already hung up... */
1180 if (--ch->count == 0)
1181 moxa_close_port(ch);
1182 } else
1183 ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
1184 mutex_unlock(&moxa_openlock);
1da177e4 1185
a8f5cda0 1186 return retval;
1da177e4
LT		 1187}
1188
1189static void moxa_close(struct tty_struct *tty, struct file *filp)
1190{
8f8ecbad 1191 struct moxa_port *ch;
1da177e4
LT		 1192 int port;
1193
11324edd 1194 port = tty->index;
a8f5cda0 1195 if (port == MAX_PORTS || tty_hung_up_p(filp))
1da177e4 1196 return;
1da177e4 1197
a8f5cda0
JS		 1198 mutex_lock(&moxa_openlock);
1199 ch = tty->driver_data;
1200 if (ch == NULL)
1201 goto unlock;
1202 if (tty->count == 1 && ch->count != 1) {
7aeb95da
JS		 1203 printk(KERN_WARNING "moxa_close: bad serial port count; "
1204 "tty->count is 1, ch->count is %d\n", ch->count);
1da177e4
LT		 1205 ch->count = 1;
1206 }
1207 if (--ch->count < 0) {
7aeb95da
JS		 1208 printk(KERN_WARNING "moxa_close: bad serial port count, "
1209 "device=%s\n", tty->name);
1da177e4
LT		 1210 ch->count = 0;
1211 }
a8f5cda0
JS		 1212 if (ch->count)
1213 goto unlock;
1da177e4
LT		 1214
1215 ch->cflag = tty->termios->c_cflag;
1216 if (ch->asyncflags & ASYNC_INITIALIZED) {
6f56b658 1217 moxa_setup_empty_event(tty);
1da177e4 1218 tty_wait_until_sent(tty, 30 * HZ); /* 30 seconds timeout */
1da177e4 1219 }
1da177e4 1220
a8f5cda0
JS		 1221 moxa_close_port(ch);
1222unlock:
1223 mutex_unlock(&moxa_openlock);
1da177e4
LT		 1224}
1225
1226static int moxa_write(struct tty_struct *tty,
1227 const unsigned char *buf, int count)
1228{
b4173f45 1229 struct moxa_port *ch = tty->driver_data;
b4173f45 1230 int len;
1da177e4 1231
1da177e4 1232 if (ch == NULL)
b4173f45 1233 return 0;
33f0f88f 1234
7bcf97d1 1235 spin_lock_bh(&moxa_lock);
2108eba5 1236 len = MoxaPortWriteData(ch, buf, count);
7bcf97d1 1237 spin_unlock_bh(&moxa_lock);
1da177e4
LT		 1238
1239 /*********************************************
1240 if ( !(ch->statusflags & LOWWAIT) &&
1241 ((len != count) || (MoxaPortTxFree(port) <= 100)) )
1242 ************************************************/
1243 ch->statusflags |= LOWWAIT;
1244 return (len);
1245}
1246
1247static int moxa_write_room(struct tty_struct *tty)
1248{
8f8ecbad 1249 struct moxa_port *ch;
1da177e4
LT		 1250
1251 if (tty->stopped)
1252 return (0);
b4173f45 1253 ch = tty->driver_data;
1da177e4
LT		 1254 if (ch == NULL)
1255 return (0);
b4173f45 1256 return MoxaPortTxFree(ch);
1da177e4
LT		 1257}
1258
1259static void moxa_flush_buffer(struct tty_struct *tty)
1260{
b4173f45 1261 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1262
1263 if (ch == NULL)
1264 return;
b4173f45 1265 MoxaPortFlushData(ch, 1);
1da177e4
LT		 1266 tty_wakeup(tty);
1267}
1268
1269static int moxa_chars_in_buffer(struct tty_struct *tty)
1270{
b4173f45 1271 struct moxa_port *ch = tty->driver_data;
1da177e4 1272 int chars;
1da177e4
LT		 1273
1274 /*
1275 * Sigh...I have to check if driver_data is NULL here, because
1276 * if an open() fails, the TTY subsystem eventually calls
1277 * tty_wait_until_sent(), which calls the driver's chars_in_buffer()
1278 * routine. And since the open() failed, we return 0 here. TDJ
1279 */
1280 if (ch == NULL)
1281 return (0);
b4173f45 1282 chars = MoxaPortTxQueue(ch);
1da177e4
LT		 1283 if (chars) {
1284 /*
1285 * Make it possible to wakeup anything waiting for output
1286 * in tty_ioctl.c, etc.
1287 */
1288 if (!(ch->statusflags & EMPTYWAIT))
6f56b658 1289 moxa_setup_empty_event(tty);
1da177e4
LT		 1290 }
1291 return (chars);
1292}
1293
1294static void moxa_flush_chars(struct tty_struct *tty)
1295{
1296 /*
1297 * Don't think I need this, because this is called to empty the TX
1298 * buffer for the 16450, 16550, etc.
1299 */
1300}
1301
1302static void moxa_put_char(struct tty_struct *tty, unsigned char c)
1303{
b4173f45 1304 struct moxa_port *ch = tty->driver_data;
1da177e4 1305
1da177e4
LT		 1306 if (ch == NULL)
1307 return;
7bcf97d1 1308 spin_lock_bh(&moxa_lock);
b4173f45 1309 MoxaPortWriteData(ch, &c, 1);
7bcf97d1 1310 spin_unlock_bh(&moxa_lock);
1da177e4
LT		 1311 /************************************************
1312 if ( !(ch->statusflags & LOWWAIT) && (MoxaPortTxFree(port) <= 100) )
1313 *************************************************/
1314 ch->statusflags |= LOWWAIT;
1315}
1316
1317static int moxa_tiocmget(struct tty_struct *tty, struct file *file)
1318{
a8f5cda0 1319 struct moxa_port *ch;
1da177e4
LT		 1320 int flag = 0, dtr, rts;
1321
a8f5cda0
JS		 1322 mutex_lock(&moxa_openlock);
1323 ch = tty->driver_data;
1324 if (!ch) {
1325 mutex_unlock(&moxa_openlock);
74d7d97b 1326 return -EINVAL;
a8f5cda0 1327 }
1da177e4 1328
b4173f45 1329 MoxaPortGetLineOut(ch, &dtr, &rts);
1da177e4
LT		 1330 if (dtr)
1331 flag |= TIOCM_DTR;
1332 if (rts)
1333 flag |= TIOCM_RTS;
b4173f45 1334 dtr = MoxaPortLineStatus(ch);
1da177e4
LT		 1335 if (dtr & 1)
1336 flag |= TIOCM_CTS;
1337 if (dtr & 2)
1338 flag |= TIOCM_DSR;
1339 if (dtr & 4)
1340 flag |= TIOCM_CD;
a8f5cda0 1341 mutex_unlock(&moxa_openlock);
1da177e4
LT		 1342 return flag;
1343}
1344
1345static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
1346 unsigned int set, unsigned int clear)
1347{
a8f5cda0 1348 struct moxa_port *ch;
1da177e4
LT		 1349 int port;
1350 int dtr, rts;
1351
11324edd 1352 port = tty->index;
a8f5cda0
JS		 1353 mutex_lock(&moxa_openlock);
1354 ch = tty->driver_data;
1355 if (!ch) {
1356 mutex_unlock(&moxa_openlock);
74d7d97b 1357 return -EINVAL;
a8f5cda0 1358 }
1da177e4 1359
b4173f45 1360 MoxaPortGetLineOut(ch, &dtr, &rts);
1da177e4
LT		 1361 if (set & TIOCM_RTS)
1362 rts = 1;
1363 if (set & TIOCM_DTR)
1364 dtr = 1;
1365 if (clear & TIOCM_RTS)
1366 rts = 0;
1367 if (clear & TIOCM_DTR)
1368 dtr = 0;
b4173f45 1369 MoxaPortLineCtrl(ch, dtr, rts);
a8f5cda0 1370 mutex_unlock(&moxa_openlock);
1da177e4
LT		 1371 return 0;
1372}
1373
1da177e4
LT		 1374static void moxa_throttle(struct tty_struct *tty)
1375{
8f8ecbad 1376 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 1377
1378 ch->statusflags |= THROTTLE;
1379}
1380
1381static void moxa_unthrottle(struct tty_struct *tty)
1382{
8f8ecbad 1383 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 1384
1385 ch->statusflags &= ~THROTTLE;
1386}
1387
1388static void moxa_set_termios(struct tty_struct *tty,
606d099c 1389 struct ktermios *old_termios)
1da177e4 1390{
8f8ecbad 1391 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 1392
1393 if (ch == NULL)
1394 return;
db1acaa6 1395 moxa_set_tty_param(tty, old_termios);
1da177e4
LT		 1396 if (!(old_termios->c_cflag & CLOCAL) &&
1397 (tty->termios->c_cflag & CLOCAL))
1398 wake_up_interruptible(&ch->open_wait);
1399}
1400
1401static void moxa_stop(struct tty_struct *tty)
1402{
8f8ecbad 1403 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 1404
1405 if (ch == NULL)
1406 return;
b4173f45 1407 MoxaPortTxDisable(ch);
1da177e4
LT		 1408 ch->statusflags |= TXSTOPPED;
1409}
1410
1411
1412static void moxa_start(struct tty_struct *tty)
1413{
8f8ecbad 1414 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 1415
1416 if (ch == NULL)
1417 return;
1418
1419 if (!(ch->statusflags & TXSTOPPED))
1420 return;
1421
b4173f45 1422 MoxaPortTxEnable(ch);
1da177e4
LT		 1423 ch->statusflags &= ~TXSTOPPED;
1424}
1425
1426static void moxa_hangup(struct tty_struct *tty)
1427{
a8f5cda0 1428 struct moxa_port *ch;
1da177e4 1429
a8f5cda0
JS		 1430 mutex_lock(&moxa_openlock);
1431 ch = tty->driver_data;
1432 if (ch == NULL) {
1433 mutex_unlock(&moxa_openlock);
1434 return;
1435 }
1da177e4 1436 ch->count = 0;
a8f5cda0
JS		 1437 moxa_close_port(ch);
1438 mutex_unlock(&moxa_openlock);
1439
1da177e4
LT		 1440 wake_up_interruptible(&ch->open_wait);
1441}
1442
7bcf97d1 1443static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
1da177e4 1444{
7bcf97d1 1445 dcd = !!dcd;
1da177e4 1446
7bcf97d1 1447 if ((dcd != p->DCDState) && p->tty && C_CLOCAL(p->tty)) {
a8f5cda0 1448 if (!dcd)
7bcf97d1 1449 tty_hangup(p->tty);
7bcf97d1
JS		 1450 }
1451 p->DCDState = dcd;
1452}
1da177e4 1453
7bcf97d1
JS		 1454static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
1455 u16 __iomem *ip)
1456{
1457 struct tty_struct *tty = p->tty;
1458 void __iomem *ofsAddr;
1459 unsigned int inited = p->asyncflags & ASYNC_INITIALIZED;
1460 u16 intr;
1461
1462 if (tty) {
1463 if ((p->statusflags & EMPTYWAIT) &&
1464 MoxaPortTxQueue(p) == 0) {
1465 p->statusflags &= ~EMPTYWAIT;
1466 tty_wakeup(tty);
1467 }
1468 if ((p->statusflags & LOWWAIT) && !tty->stopped &&
1469 MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
1470 p->statusflags &= ~LOWWAIT;
1471 tty_wakeup(tty);
1472 }
1473
1474 if (inited && !(p->statusflags & THROTTLE) &&
1475 MoxaPortRxQueue(p) > 0) { /* RX */
1476 MoxaPortReadData(p);
1477 tty_schedule_flip(tty);
1478 }
1479 } else {
1480 p->statusflags &= ~EMPTYWAIT;
1481 MoxaPortFlushData(p, 0); /* flush RX */
1da177e4 1482 }
0bcc4caa 1483
7bcf97d1
JS		 1484 if (!handle) /* nothing else to do */
1485 return 0;
1486
1487 intr = readw(ip); /* port irq status */
1488 if (intr == 0)
1489 return 0;
1490
1491 writew(0, ip); /* ACK port */
1492 ofsAddr = p->tableAddr;
1493 if (intr & IntrTx) /* disable tx intr */
1494 writew(readw(ofsAddr + HostStat) & ~WakeupTx,
1495 ofsAddr + HostStat);
1496
1497 if (!inited)
1498 return 0;
1499
1500 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
1501 tty_insert_flip_char(tty, 0, TTY_BREAK);
1502 tty_schedule_flip(tty);
1503 }
1504
1505 if (intr & IntrLine)
1506 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
1507
1508 return 0;
1509}
1510
1511static void moxa_poll(unsigned long ignored)
1512{
1513 struct moxa_board_conf *brd;
1514 u16 __iomem *ip;
2a541341 1515 unsigned int card, port, served = 0;
7bcf97d1
JS		 1516
1517 spin_lock(&moxa_lock);
1da177e4 1518 for (card = 0; card < MAX_BOARDS; card++) {
7bcf97d1
JS		 1519 brd = &moxa_boards[card];
1520 if (!brd->ready)
1da177e4 1521 continue;
7bcf97d1 1522
2a541341
JS		 1523 served++;
1524
7bcf97d1
JS		 1525 ip = NULL;
1526 if (readb(brd->intPend) == 0xff)
1527 ip = brd->intTable + readb(brd->intNdx);
1528
1529 for (port = 0; port < brd->numPorts; port++)
1530 moxa_poll_port(&brd->ports[port], !!ip, ip + port);
1531
1532 if (ip)
1533 writeb(0, brd->intPend); /* ACK */
1534
1535 if (moxaLowWaterChk) {
1536 struct moxa_port *p = brd->ports;
1537 for (port = 0; port < brd->numPorts; port++, p++)
1538 if (p->lowChkFlag) {
1539 p->lowChkFlag = 0;
1540 moxa_low_water_check(p->tableAddr);
1da177e4 1541 }
1da177e4
LT		 1542 }
1543 }
7bcf97d1 1544 moxaLowWaterChk = 0;
1da177e4 1545
2a541341
JS		 1546 if (served)
1547 mod_timer(&moxaTimer, jiffies + HZ / 50);
1548 spin_unlock(&moxa_lock);
1da177e4
LT		 1549}
1550
1551/******************************************************************************/
1552
db1acaa6 1553static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4 1554{
606d099c 1555 register struct ktermios *ts;
8f8ecbad 1556 struct moxa_port *ch;
db1acaa6 1557 int rts, cts, txflow, rxflow, xany, baud;
1da177e4 1558
8f8ecbad 1559 ch = (struct moxa_port *) tty->driver_data;
1da177e4 1560 ts = tty->termios;
1da177e4
LT		 1561 rts = cts = txflow = rxflow = xany = 0;
1562 if (ts->c_cflag & CRTSCTS)
1563 rts = cts = 1;
1564 if (ts->c_iflag & IXON)
1565 txflow = 1;
1566 if (ts->c_iflag & IXOFF)
1567 rxflow = 1;
1568 if (ts->c_iflag & IXANY)
1569 xany = 1;
db1acaa6
AC		 1570
1571 /* Clear the features we don't support */
1572 ts->c_cflag &= ~CMSPAR;
b4173f45
JS		 1573 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1574 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
db1acaa6
AC		 1575 if (baud == -1)
1576 baud = tty_termios_baud_rate(old_termios);
1577 /* Not put the baud rate into the termios data */
1578 tty_encode_baud_rate(tty, baud, baud);
1da177e4
LT		 1579}
1580
6f56b658 1581static void moxa_setup_empty_event(struct tty_struct *tty)
1da177e4 1582{
8f8ecbad 1583 struct moxa_port *ch = tty->driver_data;
1da177e4 1584
7bcf97d1 1585 spin_lock_bh(&moxa_lock);
1da177e4 1586 ch->statusflags |= EMPTYWAIT;
7bcf97d1 1587 spin_unlock_bh(&moxa_lock);
1da177e4
LT		 1588}
1589
6f56b658 1590static void moxa_shut_down(struct moxa_port *ch)
1da177e4 1591{
a8f5cda0 1592 struct tty_struct *tp = ch->tty;
1da177e4
LT		 1593
1594 if (!(ch->asyncflags & ASYNC_INITIALIZED))
1595 return;
1596
b4173f45 1597 MoxaPortDisable(ch);
1da177e4
LT		 1598
1599 /*
1600 * If we're a modem control device and HUPCL is on, drop RTS & DTR.
1601 */
a8f5cda0 1602 if (C_HUPCL(tp))
b4173f45 1603 MoxaPortLineCtrl(ch, 0, 0);
1da177e4 1604
a8f5cda0 1605 spin_lock_bh(&moxa_lock);
1da177e4 1606 ch->asyncflags &= ~ASYNC_INITIALIZED;
a8f5cda0 1607 spin_unlock_bh(&moxa_lock);
1da177e4
LT		 1608}
1609
1da177e4
LT		 1610/*****************************************************************************
1611 * Driver level functions: *
1da177e4 1612 *****************************************************************************/
1da177e4 1613
b4173f45 1614static void MoxaPortFlushData(struct moxa_port *port, int mode)
1da177e4
LT		 1615{
1616 void __iomem *ofsAddr;
1617 if ((mode < 0) || (mode > 2))
1618 return;
b4173f45 1619 ofsAddr = port->tableAddr;
1da177e4
LT		 1620 moxafunc(ofsAddr, FC_FlushQueue, mode);
1621 if (mode != 1) {
b4173f45 1622 port->lowChkFlag = 0;
6f56b658 1623 moxa_low_water_check(ofsAddr);
1da177e4
LT		 1624 }
1625}
1626
1da177e4
LT		 1627/*****************************************************************************
1628 * Port level functions: *
1da177e4
LT		 1629 * 2. MoxaPortEnable(int port); *
1630 * 3. MoxaPortDisable(int port); *
1631 * 4. MoxaPortGetMaxBaud(int port); *
1da177e4 1632 * 6. MoxaPortSetBaud(int port, long baud); *
1da177e4
LT		 1633 * 8. MoxaPortSetTermio(int port, unsigned char *termio); *
1634 * 9. MoxaPortGetLineOut(int port, int *dtrState, int *rtsState); *
1635 * 10. MoxaPortLineCtrl(int port, int dtrState, int rtsState); *
1636 * 11. MoxaPortFlowCtrl(int port, int rts, int cts, int rx, int tx,int xany); *
1637 * 12. MoxaPortLineStatus(int port); *
1da177e4
LT		 1638 * 15. MoxaPortFlushData(int port, int mode); *
1639 * 16. MoxaPortWriteData(int port, unsigned char * buffer, int length); *
33f0f88f 1640 * 17. MoxaPortReadData(int port, struct tty_struct *tty); *
1da177e4
LT		 1641 * 20. MoxaPortTxQueue(int port); *
1642 * 21. MoxaPortTxFree(int port); *
1643 * 22. MoxaPortRxQueue(int port); *
1da177e4
LT		 1644 * 24. MoxaPortTxDisable(int port); *
1645 * 25. MoxaPortTxEnable(int port); *
1da177e4 1646 * 27. MoxaPortResetBrkCnt(int port); *
1da177e4
LT		 1647 *****************************************************************************/
1648/*
1649 * Moxa Port Number Description:
1650 *
1651 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1652 * the port number using in MOXA driver functions will be 0 to 31 for
1653 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1654 * to 127 for fourth. For example, if you setup three MOXA boards,
1655 * first board is C218, second board is C320-16 and third board is
1656 * C320-32. The port number of first board (C218 - 8 ports) is from
1657 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1658 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1659 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1660 * 127 will be invalid.
1661 *
1662 *
1663 * Moxa Functions Description:
1664 *
1665 * Function 1: Driver initialization routine, this routine must be
1666 * called when initialized driver.
1667 * Syntax:
1668 * void MoxaDriverInit();
1669 *
1670 *
1671 * Function 2: Moxa driver private IOCTL command processing.
1672 * Syntax:
1673 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1674 *
1675 * unsigned int cmd : IOCTL command
1676 * unsigned long arg : IOCTL argument
1677 * int port : port number (0 - 127)
1678 *
1679 * return: 0 (OK)
1680 * -EINVAL
1681 * -ENOIOCTLCMD
1682 *
1683 *
1da177e4
LT		 1684 * Function 6: Enable this port to start Tx/Rx data.
1685 * Syntax:
1686 * void MoxaPortEnable(int port);
1687 * int port : port number (0 - 127)
1688 *
1689 *
1690 * Function 7: Disable this port
1691 * Syntax:
1692 * void MoxaPortDisable(int port);
1693 * int port : port number (0 - 127)
1694 *
1695 *
1696 * Function 8: Get the maximun available baud rate of this port.
1697 * Syntax:
1698 * long MoxaPortGetMaxBaud(int port);
1699 * int port : port number (0 - 127)
1700 *
1701 * return: 0 : this port is invalid
1702 * 38400/57600/115200 bps
1703 *
1704 *
1da177e4
LT		 1705 * Function 10: Setting baud rate of this port.
1706 * Syntax:
1707 * long MoxaPortSetBaud(int port, long baud);
1708 * int port : port number (0 - 127)
1709 * long baud : baud rate (50 - 115200)
1710 *
1711 * return: 0 : this port is invalid or baud < 50
1712 * 50 - 115200 : the real baud rate set to the port, if
1713 * the argument baud is large than maximun
1714 * available baud rate, the real setting
1715 * baud rate will be the maximun baud rate.
1716 *
1717 *
1da177e4
LT		 1718 * Function 12: Configure the port.
1719 * Syntax:
606d099c 1720 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1da177e4 1721 * int port : port number (0 - 127)
606d099c 1722 * struct ktermios * termio : termio structure pointer
c7bce309 1723 * speed_t baud : baud rate
1da177e4
LT		 1724 *
1725 * return: -1 : this port is invalid or termio == NULL
1726 * 0 : setting O.K.
1727 *
1728 *
1729 * Function 13: Get the DTR/RTS state of this port.
1730 * Syntax:
1731 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1732 * int port : port number (0 - 127)
1733 * int * dtrState : pointer to INT to receive the current DTR
1734 * state. (if NULL, this function will not
1735 * write to this address)
1736 * int * rtsState : pointer to INT to receive the current RTS
1737 * state. (if NULL, this function will not
1738 * write to this address)
1739 *
1740 * return: -1 : this port is invalid
1741 * 0 : O.K.
1742 *
1743 *
1744 * Function 14: Setting the DTR/RTS output state of this port.
1745 * Syntax:
1746 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1747 * int port : port number (0 - 127)
1748 * int dtrState : DTR output state (0: off, 1: on)
1749 * int rtsState : RTS output state (0: off, 1: on)
1750 *
1751 *
1752 * Function 15: Setting the flow control of this port.
1753 * Syntax:
1754 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1755 * int txFlow,int xany);
1756 * int port : port number (0 - 127)
1757 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1758 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1759 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1760 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1761 * int xany : S/W XANY flow control (0: no, 1: yes)
1762 *
1763 *
1764 * Function 16: Get ths line status of this port
1765 * Syntax:
1766 * int MoxaPortLineStatus(int port);
1767 * int port : port number (0 - 127)
1768 *
1769 * return: Bit 0 - CTS state (0: off, 1: on)
1770 * Bit 1 - DSR state (0: off, 1: on)
1771 * Bit 2 - DCD state (0: off, 1: on)
1772 *
1773 *
1da177e4
LT		 1774 * Function 19: Flush the Rx/Tx buffer data of this port.
1775 * Syntax:
1776 * void MoxaPortFlushData(int port, int mode);
1777 * int port : port number (0 - 127)
1778 * int mode
1779 * 0 : flush the Rx buffer
1780 * 1 : flush the Tx buffer
1781 * 2 : flush the Rx and Tx buffer
1782 *
1783 *
1784 * Function 20: Write data.
1785 * Syntax:
1786 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1787 * int port : port number (0 - 127)
1788 * unsigned char * buffer : pointer to write data buffer.
1789 * int length : write data length
1790 *
1791 * return: 0 - length : real write data length
1792 *
1793 *
1794 * Function 21: Read data.
1795 * Syntax:
33f0f88f 1796 * int MoxaPortReadData(int port, struct tty_struct *tty);
1da177e4 1797 * int port : port number (0 - 127)
33f0f88f 1798 * struct tty_struct *tty : tty for data
1da177e4
LT		 1799 *
1800 * return: 0 - length : real read data length
1801 *
1802 *
1da177e4
LT		 1803 * Function 24: Get the Tx buffer current queued data bytes
1804 * Syntax:
1805 * int MoxaPortTxQueue(int port);
1806 * int port : port number (0 - 127)
1807 *
1808 * return: .. : Tx buffer current queued data bytes
1809 *
1810 *
1811 * Function 25: Get the Tx buffer current free space
1812 * Syntax:
1813 * int MoxaPortTxFree(int port);
1814 * int port : port number (0 - 127)
1815 *
1816 * return: .. : Tx buffer current free space
1817 *
1818 *
1819 * Function 26: Get the Rx buffer current queued data bytes
1820 * Syntax:
1821 * int MoxaPortRxQueue(int port);
1822 * int port : port number (0 - 127)
1823 *
1824 * return: .. : Rx buffer current queued data bytes
1825 *
1826 *
1da177e4
LT		 1827 * Function 28: Disable port data transmission.
1828 * Syntax:
1829 * void MoxaPortTxDisable(int port);
1830 * int port : port number (0 - 127)
1831 *
1832 *
1833 * Function 29: Enable port data transmission.
1834 * Syntax:
1835 * void MoxaPortTxEnable(int port);
1836 * int port : port number (0 - 127)
1837 *
1838 *
1da177e4
LT		 1839 * Function 31: Get the received BREAK signal count and reset it.
1840 * Syntax:
1841 * int MoxaPortResetBrkCnt(int port);
1842 * int port : port number (0 - 127)
1843 *
1844 * return: 0 - .. : BREAK signal count
1845 *
1846 *
1da177e4 1847 */
1da177e4 1848
b4173f45 1849static void MoxaPortEnable(struct moxa_port *port)
1da177e4
LT		 1850{
1851 void __iomem *ofsAddr;
1da177e4
LT		 1852 short lowwater = 512;
1853
b4173f45 1854 ofsAddr = port->tableAddr;
1da177e4 1855 writew(lowwater, ofsAddr + Low_water);
b4173f45
JS		 1856 if (port->board->boardType == MOXA_BOARD_C320_ISA ||
1857 port->board->boardType == MOXA_BOARD_C320_PCI) {
1da177e4
LT		 1858 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
1859 } else {
1860 writew(readw(ofsAddr + HostStat) | WakeupBreak, ofsAddr + HostStat);
1861 }
1862
1863 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
1864 moxafunc(ofsAddr, FC_FlushQueue, 2);
1865
1866 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
1867 MoxaPortLineStatus(port);
1868}
1869
b4173f45 1870static void MoxaPortDisable(struct moxa_port *port)
1da177e4 1871{
b4173f45 1872 void __iomem *ofsAddr = port->tableAddr;
1da177e4
LT		 1873
1874 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
1875 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
1876 writew(0, ofsAddr + HostStat);
1877 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
1878}
1879
b4173f45 1880static long MoxaPortGetMaxBaud(struct moxa_port *port)
1da177e4 1881{
b4173f45
JS		 1882 if (port->board->boardType == MOXA_BOARD_C320_ISA ||
1883 port->board->boardType == MOXA_BOARD_C320_PCI)
1da177e4
LT		 1884 return (460800L);
1885 else
1886 return (921600L);
1887}
1888
1889
b4173f45 1890static long MoxaPortSetBaud(struct moxa_port *port, long baud)
1da177e4
LT		 1891{
1892 void __iomem *ofsAddr;
1893 long max, clock;
1894 unsigned int val;
1895
1896 if ((baud < 50L) || ((max = MoxaPortGetMaxBaud(port)) == 0))
1897 return (0);
b4173f45 1898 ofsAddr = port->tableAddr;
1da177e4
LT		 1899 if (baud > max)
1900 baud = max;
1901 if (max == 38400L)
1902 clock = 614400L; /* for 9.8304 Mhz : max. 38400 bps */
1903 else if (max == 57600L)
1904 clock = 691200L; /* for 11.0592 Mhz : max. 57600 bps */
1905 else
1906 clock = 921600L; /* for 14.7456 Mhz : max. 115200 bps */
1907 val = clock / baud;
1908 moxafunc(ofsAddr, FC_SetBaud, val);
1909 baud = clock / val;
1da177e4
LT		 1910 return (baud);
1911}
1912
b4173f45
JS		 1913static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
1914 speed_t baud)
1da177e4
LT		 1915{
1916 void __iomem *ofsAddr;
1917 tcflag_t cflag;
1da177e4
LT		 1918 tcflag_t mode = 0;
1919
b4173f45 1920 ofsAddr = port->tableAddr;
1da177e4
LT		 1921 cflag = termio->c_cflag; /* termio->c_cflag */
1922
1923 mode = termio->c_cflag & CSIZE;
1924 if (mode == CS5)
1925 mode = MX_CS5;
1926 else if (mode == CS6)
1927 mode = MX_CS6;
1928 else if (mode == CS7)
1929 mode = MX_CS7;
1930 else if (mode == CS8)
1931 mode = MX_CS8;
1932
1933 if (termio->c_cflag & CSTOPB) {
1934 if (mode == MX_CS5)
1935 mode |= MX_STOP15;
1936 else
1937 mode |= MX_STOP2;
1938 } else
1939 mode |= MX_STOP1;
1940
1941 if (termio->c_cflag & PARENB) {
1942 if (termio->c_cflag & PARODD)
1943 mode |= MX_PARODD;
1944 else
1945 mode |= MX_PAREVEN;
1946 } else
1947 mode |= MX_PARNONE;
1948
1949 moxafunc(ofsAddr, FC_SetDataMode, (ushort) mode);
1950
b4173f45
JS		 1951 if (port->board->boardType == MOXA_BOARD_C320_ISA ||
1952 port->board->boardType == MOXA_BOARD_C320_PCI) {
c7bce309 1953 if (baud >= 921600L)
1da177e4
LT		 1954 return (-1);
1955 }
db1acaa6 1956 baud = MoxaPortSetBaud(port, baud);
1da177e4
LT		 1957
1958 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
1959 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
1960 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
1961 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
6f56b658 1962 moxa_wait_finish(ofsAddr);
1da177e4
LT		 1963
1964 }
db1acaa6 1965 return (baud);
1da177e4
LT		 1966}
1967
b4173f45
JS		 1968static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
1969 int *rtsState)
1da177e4
LT		 1970{
1971
b4173f45
JS		 1972 if (dtrState)
1973 *dtrState = !!(port->lineCtrl & DTR_ON);
1974 if (rtsState)
1975 *rtsState = !!(port->lineCtrl & RTS_ON);
1976
1da177e4
LT		 1977 return (0);
1978}
1979
b4173f45 1980static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
1da177e4 1981{
b4173f45 1982 int mode = 0;
1da177e4 1983
1da177e4
LT		 1984 if (dtr)
1985 mode |= DTR_ON;
1986 if (rts)
1987 mode |= RTS_ON;
b4173f45
JS		 1988 port->lineCtrl = mode;
1989 moxafunc(port->tableAddr, FC_LineControl, mode);
1da177e4
LT		 1990}
1991
b4173f45
JS		 1992static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
1993 int txflow, int rxflow, int txany)
1da177e4 1994{
b4173f45 1995 int mode = 0;
1da177e4 1996
1da177e4
LT		 1997 if (rts)
1998 mode |= RTS_FlowCtl;
1999 if (cts)
2000 mode |= CTS_FlowCtl;
2001 if (txflow)
2002 mode |= Tx_FlowCtl;
2003 if (rxflow)
2004 mode |= Rx_FlowCtl;
2005 if (txany)
2006 mode |= IXM_IXANY;
b4173f45 2007 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
1da177e4
LT		 2008}
2009
b4173f45 2010static int MoxaPortLineStatus(struct moxa_port *port)
1da177e4
LT		 2011{
2012 void __iomem *ofsAddr;
2013 int val;
2014
b4173f45
JS		 2015 ofsAddr = port->tableAddr;
2016 if (port->board->boardType == MOXA_BOARD_C320_ISA ||
2017 port->board->boardType == MOXA_BOARD_C320_PCI) {
1da177e4
LT		 2018 moxafunc(ofsAddr, FC_LineStatus, 0);
2019 val = readw(ofsAddr + FuncArg);
2020 } else {
2021 val = readw(ofsAddr + FlagStat) >> 4;
2022 }
2023 val &= 0x0B;
7bcf97d1 2024 if (val & 8)
1da177e4 2025 val |= 4;
a8f5cda0 2026 spin_lock_bh(&moxa_lock);
7bcf97d1 2027 moxa_new_dcdstate(port, val & 8);
a8f5cda0 2028 spin_unlock_bh(&moxa_lock);
1da177e4 2029 val &= 7;
7bcf97d1 2030 return val;
1da177e4
LT		 2031}
2032
2108eba5
JS		 2033static int MoxaPortWriteData(struct moxa_port *port,
2034 const unsigned char *buffer, int len)
1da177e4 2035{
1da177e4 2036 void __iomem *baseAddr, *ofsAddr, *ofs;
2108eba5
JS		 2037 unsigned int c, total;
2038 u16 head, tail, tx_mask, spage, epage;
2039 u16 pageno, pageofs, bufhead;
1da177e4 2040
b4173f45
JS		 2041 ofsAddr = port->tableAddr;
2042 baseAddr = port->board->basemem;
1da177e4
LT		 2043 tx_mask = readw(ofsAddr + TX_mask);
2044 spage = readw(ofsAddr + Page_txb);
2045 epage = readw(ofsAddr + EndPage_txb);
2046 tail = readw(ofsAddr + TXwptr);
2047 head = readw(ofsAddr + TXrptr);
2108eba5 2048 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
1da177e4
LT		 2049 if (c > len)
2050 c = len;
b4173f45 2051 moxaLog.txcnt[port->tty->index] += c;
1da177e4
LT		 2052 total = c;
2053 if (spage == epage) {
2054 bufhead = readw(ofsAddr + Ofs_txb);
2055 writew(spage, baseAddr + Control_reg);
2056 while (c > 0) {
2057 if (head > tail)
2058 len = head - tail - 1;
2059 else
2060 len = tx_mask + 1 - tail;
2061 len = (c > len) ? len : c;
2062 ofs = baseAddr + DynPage_addr + bufhead + tail;
2108eba5
JS		 2063 memcpy_toio(ofs, buffer, len);
2064 buffer += len;
1da177e4
LT		 2065 tail = (tail + len) & tx_mask;
2066 c -= len;
2067 }
1da177e4 2068 } else {
1da177e4
LT		 2069 pageno = spage + (tail >> 13);
2070 pageofs = tail & Page_mask;
2108eba5
JS		 2071 while (c > 0) {
2072 len = Page_size - pageofs;
2073 if (len > c)
2074 len = c;
1da177e4
LT		 2075 writeb(pageno, baseAddr + Control_reg);
2076 ofs = baseAddr + DynPage_addr + pageofs;
2108eba5
JS		 2077 memcpy_toio(ofs, buffer, len);
2078 buffer += len;
1da177e4
LT		 2079 if (++pageno == epage)
2080 pageno = spage;
2081 pageofs = 0;
2108eba5
JS		 2082 c -= len;
2083 }
2084 tail = (tail + total) & tx_mask;
1da177e4 2085 }
2108eba5 2086 writew(tail, ofsAddr + TXwptr);
1da177e4 2087 writeb(1, ofsAddr + CD180TXirq); /* start to send */
2108eba5 2088 return total;
1da177e4
LT		 2089}
2090
7bcf97d1 2091static int MoxaPortReadData(struct moxa_port *port)
1da177e4 2092{
7bcf97d1 2093 struct tty_struct *tty = port->tty;
2108eba5 2094 unsigned char *dst;
1da177e4 2095 void __iomem *baseAddr, *ofsAddr, *ofs;
2108eba5
JS		 2096 unsigned int count, len, total;
2097 u16 tail, rx_mask, spage, epage;
2098 u16 pageno, pageofs, bufhead, head;
1da177e4 2099
b4173f45
JS		 2100 ofsAddr = port->tableAddr;
2101 baseAddr = port->board->basemem;
1da177e4
LT		 2102 head = readw(ofsAddr + RXrptr);
2103 tail = readw(ofsAddr + RXwptr);
2104 rx_mask = readw(ofsAddr + RX_mask);
2105 spage = readw(ofsAddr + Page_rxb);
2106 epage = readw(ofsAddr + EndPage_rxb);
2108eba5 2107 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
1da177e4 2108 if (count == 0)
33f0f88f 2109 return 0;
1da177e4 2110
33f0f88f 2111 total = count;
7bcf97d1 2112 moxaLog.rxcnt[tty->index] += total;
1da177e4
LT		 2113 if (spage == epage) {
2114 bufhead = readw(ofsAddr + Ofs_rxb);
2115 writew(spage, baseAddr + Control_reg);
2116 while (count > 0) {
1da177e4 2117 ofs = baseAddr + DynPage_addr + bufhead + head;
2108eba5
JS		 2118 len = (tail >= head) ? (tail - head) :
2119 (rx_mask + 1 - head);
2120 len = tty_prepare_flip_string(tty, &dst,
2121 min(len, count));
2122 memcpy_fromio(dst, ofs, len);
1da177e4
LT		 2123 head = (head + len) & rx_mask;
2124 count -= len;
2125 }
1da177e4 2126 } else {
1da177e4
LT		 2127 pageno = spage + (head >> 13);
2128 pageofs = head & Page_mask;
2108eba5 2129 while (count > 0) {
1da177e4
LT		 2130 writew(pageno, baseAddr + Control_reg);
2131 ofs = baseAddr + DynPage_addr + pageofs;
2108eba5
JS		 2132 len = tty_prepare_flip_string(tty, &dst,
2133 min(Page_size - pageofs, count));
2134 memcpy_fromio(dst, ofs, len);
2135
2136 count -= len;
2137 pageofs = (pageofs + len) & Page_mask;
2138 if (pageofs == 0 && ++pageno == epage)
1da177e4 2139 pageno = spage;
2108eba5
JS		 2140 }
2141 head = (head + total) & rx_mask;
1da177e4 2142 }
2108eba5
JS		 2143 writew(head, ofsAddr + RXrptr);
2144 if (readb(ofsAddr + FlagStat) & Xoff_state) {
1da177e4 2145 moxaLowWaterChk = 1;
b4173f45 2146 port->lowChkFlag = 1;
1da177e4 2147 }
2108eba5 2148 return total;
1da177e4
LT		 2149}
2150
2151
b4173f45 2152static int MoxaPortTxQueue(struct moxa_port *port)
1da177e4 2153{
b4173f45 2154 void __iomem *ofsAddr = port->tableAddr;
2108eba5 2155 u16 rptr, wptr, mask;
1da177e4 2156
1da177e4
LT		 2157 rptr = readw(ofsAddr + TXrptr);
2158 wptr = readw(ofsAddr + TXwptr);
2159 mask = readw(ofsAddr + TX_mask);
2108eba5 2160 return (wptr - rptr) & mask;
1da177e4
LT		 2161}
2162
b4173f45 2163static int MoxaPortTxFree(struct moxa_port *port)
1da177e4 2164{
b4173f45 2165 void __iomem *ofsAddr = port->tableAddr;
2108eba5 2166 u16 rptr, wptr, mask;
1da177e4 2167
1da177e4
LT		 2168 rptr = readw(ofsAddr + TXrptr);
2169 wptr = readw(ofsAddr + TXwptr);
2170 mask = readw(ofsAddr + TX_mask);
2108eba5 2171 return mask - ((wptr - rptr) & mask);
1da177e4
LT		 2172}
2173
b4173f45 2174static int MoxaPortRxQueue(struct moxa_port *port)
1da177e4 2175{
b4173f45 2176 void __iomem *ofsAddr = port->tableAddr;
2108eba5 2177 u16 rptr, wptr, mask;
1da177e4 2178
1da177e4
LT		 2179 rptr = readw(ofsAddr + RXrptr);
2180 wptr = readw(ofsAddr + RXwptr);
2181 mask = readw(ofsAddr + RX_mask);
2108eba5 2182 return (wptr - rptr) & mask;
1da177e4
LT		 2183}
2184
b4173f45 2185static void MoxaPortTxDisable(struct moxa_port *port)
1da177e4 2186{
b4173f45 2187 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
1da177e4
LT		 2188}
2189
b4173f45 2190static void MoxaPortTxEnable(struct moxa_port *port)
1da177e4 2191{
b4173f45 2192 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
1da177e4
LT		 2193}
2194
8f8ecbad 2195static int moxa_get_serial_info(struct moxa_port *info,
1da177e4
LT		 2196 struct serial_struct __user *retinfo)
2197{
2198 struct serial_struct tmp;
2199
2200 memset(&tmp, 0, sizeof(tmp));
2201 tmp.type = info->type;
b4173f45 2202 tmp.line = info->tty->index;
1da177e4
LT		 2203 tmp.port = 0;
2204 tmp.irq = 0;
2205 tmp.flags = info->asyncflags;
2206 tmp.baud_base = 921600;
2207 tmp.close_delay = info->close_delay;
1da177e4
LT		 2208 tmp.custom_divisor = 0;
2209 tmp.hub6 = 0;
2210 if(copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2211 return -EFAULT;
2212 return (0);
2213}
2214
2215
8f8ecbad 2216static int moxa_set_serial_info(struct moxa_port *info,
1da177e4
LT		 2217 struct serial_struct __user *new_info)
2218{
2219 struct serial_struct new_serial;
2220
2221 if(copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2222 return -EFAULT;
2223
2224 if ((new_serial.irq != 0) ||
2225 (new_serial.port != 0) ||
2226// (new_serial.type != info->type) ||
2227 (new_serial.custom_divisor != 0) ||
2228 (new_serial.baud_base != 921600))
2229 return (-EPERM);
2230
2231 if (!capable(CAP_SYS_ADMIN)) {
2232 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
2233 (info->asyncflags & ~ASYNC_USR_MASK)))
2234 return (-EPERM);
2235 } else {
2236 info->close_delay = new_serial.close_delay * HZ / 100;
1da177e4
LT		 2237 }
2238
2239 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
2240 new_serial.flags |= (info->asyncflags & ASYNC_FLAGS);
2241
2242 if (new_serial.type == PORT_16550A) {
b4173f45 2243 MoxaSetFifo(info, 1);
1da177e4 2244 } else {
b4173f45 2245 MoxaSetFifo(info, 0);
1da177e4
LT		 2246 }
2247
2248 info->type = new_serial.type;
2249 return (0);
2250}
2251
2252
2253
2254/*****************************************************************************
2255 * Static local functions: *
2256 *****************************************************************************/
1da177e4 2257
b4173f45 2258static void MoxaSetFifo(struct moxa_port *port, int enable)
1da177e4 2259{
b4173f45 2260 void __iomem *ofsAddr = port->tableAddr;
1da177e4
LT		 2261
2262 if (!enable) {
2263 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2264 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2265 } else {
2266 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2267 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
2268 }
2269}
Linux 6.x block layer and io_uring tree(s)