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Char: moxa, notify about board readiness
[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 56#define MOXAMAJOR 172
1da177e4 57
11324edd 58#define MAX_BOARDS 4 /* Don't change this value */
1da177e4 59#define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
11324edd 60#define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
1da177e4 61
08d01c79
JS		 62#define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \
63 (brd)->boardType == MOXA_BOARD_C320_PCI)
64
1da177e4
LT		 65/*
66 * Define the Moxa PCI vendor and device IDs.
67 */
11324edd
JS		 68#define MOXA_BUS_TYPE_ISA 0
69#define MOXA_BUS_TYPE_PCI 1
1da177e4 70
1da177e4
LT		 71enum {
72 MOXA_BOARD_C218_PCI = 1,
73 MOXA_BOARD_C218_ISA,
74 MOXA_BOARD_C320_PCI,
75 MOXA_BOARD_C320_ISA,
76 MOXA_BOARD_CP204J,
77};
78
79static char *moxa_brdname[] =
80{
81 "C218 Turbo PCI series",
82 "C218 Turbo ISA series",
83 "C320 Turbo PCI series",
84 "C320 Turbo ISA series",
85 "CP-204J series",
86};
87
88#ifdef CONFIG_PCI
89static struct pci_device_id moxa_pcibrds[] = {
5ebb4078
JS		 90 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218),
91 .driver_data = MOXA_BOARD_C218_PCI },
92 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320),
93 .driver_data = MOXA_BOARD_C320_PCI },
94 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J),
95 .driver_data = MOXA_BOARD_CP204J },
1da177e4
LT		 96 { 0 }
97};
98MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
99#endif /* CONFIG_PCI */
100
03718234
JS		 101struct moxa_port;
102
8f8ecbad 103static struct moxa_board_conf {
1da177e4
LT		 104 int boardType;
105 int numPorts;
1da177e4 106 int busType;
8f8ecbad 107
810ab09b 108 unsigned int ready;
8f8ecbad 109
03718234
JS		 110 struct moxa_port *ports;
111
8f8ecbad
JS		 112 void __iomem *basemem;
113 void __iomem *intNdx;
114 void __iomem *intPend;
115 void __iomem *intTable;
116} moxa_boards[MAX_BOARDS];
117
118struct mxser_mstatus {
119 tcflag_t cflag;
120 int cts;
121 int dsr;
122 int ri;
123 int dcd;
9dff89cd 124};
1da177e4 125
8f8ecbad
JS		 126struct moxaq_str {
127 int inq;
128 int outq;
129};
1da177e4 130
8f8ecbad 131struct moxa_port {
b4173f45 132 struct moxa_board_conf *board;
7bcf97d1
JS		 133 struct tty_struct *tty;
134 void __iomem *tableAddr;
135
1da177e4 136 int type;
1da177e4 137 int close_delay;
a8f5cda0 138 unsigned int count;
1da177e4 139 int asyncflags;
1da177e4 140 int cflag;
7bcf97d1 141 unsigned long statusflags;
1da177e4 142 wait_queue_head_t open_wait;
1da177e4 143
7bcf97d1
JS		 144 u8 DCDState;
145 u8 lineCtrl;
146 u8 lowChkFlag;
8f8ecbad 147};
1da177e4 148
74d7d97b
JS		 149struct mon_str {
150 int tick;
151 int rxcnt[MAX_PORTS];
152 int txcnt[MAX_PORTS];
153};
154
1da177e4
LT		 155/* statusflags */
156#define TXSTOPPED 0x1
157#define LOWWAIT 0x2
158#define EMPTYWAIT 0x4
159#define THROTTLE 0x8
160
1da177e4
LT		 161#define SERIAL_DO_RESTART
162
1da177e4
LT		 163#define WAKEUP_CHARS 256
164
1da177e4 165static int ttymajor = MOXAMAJOR;
74d7d97b
JS		 166static struct mon_str moxaLog;
167static unsigned int moxaFuncTout = HZ / 2;
7bcf97d1 168static unsigned int moxaLowWaterChk;
a8f5cda0 169static DEFINE_MUTEX(moxa_openlock);
1da177e4
LT		 170/* Variables for insmod */
171#ifdef MODULE
d353eca4
JS		 172static unsigned long baseaddr[MAX_BOARDS];
173static unsigned int type[MAX_BOARDS];
174static unsigned int numports[MAX_BOARDS];
1da177e4
LT		 175#endif
176
177MODULE_AUTHOR("William Chen");
178MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
179MODULE_LICENSE("GPL");
180#ifdef MODULE
d353eca4
JS		 181module_param_array(type, uint, NULL, 0);
182MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
183module_param_array(baseaddr, ulong, NULL, 0);
184MODULE_PARM_DESC(baseaddr, "base address");
185module_param_array(numports, uint, NULL, 0);
186MODULE_PARM_DESC(numports, "numports (ignored for C218)");
1da177e4
LT		 187#endif
188module_param(ttymajor, int, 0);
1da177e4 189
1da177e4
LT		 190/*
191 * static functions:
192 */
1da177e4
LT		 193static int moxa_open(struct tty_struct *, struct file *);
194static void moxa_close(struct tty_struct *, struct file *);
195static int moxa_write(struct tty_struct *, const unsigned char *, int);
196static int moxa_write_room(struct tty_struct *);
197static void moxa_flush_buffer(struct tty_struct *);
198static int moxa_chars_in_buffer(struct tty_struct *);
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
eaa95a8d 249static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
74d7d97b
JS		 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,
1da177e4
LT		 395 .ioctl = moxa_ioctl,
396 .throttle = moxa_throttle,
397 .unthrottle = moxa_unthrottle,
398 .set_termios = moxa_set_termios,
399 .stop = moxa_stop,
400 .start = moxa_start,
401 .hangup = moxa_hangup,
74d7d97b 402 .break_ctl = moxa_break_ctl,
1da177e4
LT		 403 .tiocmget = moxa_tiocmget,
404 .tiocmset = moxa_tiocmset,
405};
406
aa7e5221 407static struct tty_driver *moxaDriver;
aa7e5221 408static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
34af946a 409static DEFINE_SPINLOCK(moxa_lock);
33f0f88f 410
74d7d97b
JS		 411/*
412 * HW init
413 */
414
03718234
JS		 415static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
416{
417 switch (brd->boardType) {
418 case MOXA_BOARD_C218_ISA:
419 case MOXA_BOARD_C218_PCI:
420 if (model != 1)
421 goto err;
422 break;
423 case MOXA_BOARD_CP204J:
424 if (model != 3)
425 goto err;
426 break;
427 default:
428 if (model != 2)
429 goto err;
430 break;
431 }
432 return 0;
433err:
434 return -EINVAL;
435}
436
437static int moxa_check_fw(const void *ptr)
438{
439 const __le16 *lptr = ptr;
440
441 if (*lptr != cpu_to_le16(0x7980))
442 return -EINVAL;
443
444 return 0;
445}
446
447static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
448 size_t len)
449{
450 void __iomem *baseAddr = brd->basemem;
451 u16 tmp;
452
453 writeb(HW_reset, baseAddr + Control_reg); /* reset */
454 msleep(10);
455 memset_io(baseAddr, 0, 4096);
456 memcpy_toio(baseAddr, buf, len); /* download BIOS */
457 writeb(0, baseAddr + Control_reg); /* restart */
458
459 msleep(2000);
460
461 switch (brd->boardType) {
462 case MOXA_BOARD_C218_ISA:
463 case MOXA_BOARD_C218_PCI:
464 tmp = readw(baseAddr + C218_key);
465 if (tmp != C218_KeyCode)
466 goto err;
467 break;
468 case MOXA_BOARD_CP204J:
469 tmp = readw(baseAddr + C218_key);
470 if (tmp != CP204J_KeyCode)
471 goto err;
472 break;
473 default:
474 tmp = readw(baseAddr + C320_key);
475 if (tmp != C320_KeyCode)
476 goto err;
477 tmp = readw(baseAddr + C320_status);
478 if (tmp != STS_init) {
eaa95a8d 479 printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic "
03718234
JS		 480 "module not found\n");
481 return -EIO;
482 }
483 break;
484 }
485
486 return 0;
487err:
eaa95a8d 488 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
03718234
JS		 489 return -EIO;
490}
491
492static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
493 size_t len)
494{
495 void __iomem *baseAddr = brd->basemem;
496
497 if (len < 7168) {
eaa95a8d 498 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
03718234
JS		 499 return -EINVAL;
500 }
501
502 writew(len - 7168 - 2, baseAddr + C320bapi_len);
503 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
504 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
505 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
506 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
507
508 return 0;
509}
510
5292bcd3 511static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
03718234
JS		 512 size_t len)
513{
514 void __iomem *baseAddr = brd->basemem;
515 const u16 *uptr = ptr;
516 size_t wlen, len2, j;
5292bcd3 517 unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
08d01c79 518 unsigned int i, retry;
03718234
JS		 519 u16 usum, keycode;
520
5292bcd3
JS		 521 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
522 C218_KeyCode;
03718234 523
5292bcd3
JS		 524 switch (brd->boardType) {
525 case MOXA_BOARD_CP204J:
526 case MOXA_BOARD_C218_ISA:
527 case MOXA_BOARD_C218_PCI:
528 key = C218_key;
529 loadbuf = C218_LoadBuf;
530 loadlen = C218DLoad_len;
531 checksum = C218check_sum;
532 checksum_ok = C218chksum_ok;
533 break;
534 default:
535 key = C320_key;
536 keycode = C320_KeyCode;
537 loadbuf = C320_LoadBuf;
538 loadlen = C320DLoad_len;
539 checksum = C320check_sum;
540 checksum_ok = C320chksum_ok;
541 break;
03718234 542 }
03718234
JS		 543
544 usum = 0;
545 wlen = len >> 1;
546 for (i = 0; i < wlen; i++)
547 usum += le16_to_cpu(uptr[i]);
548 retry = 0;
549 do {
550 wlen = len >> 1;
551 j = 0;
552 while (wlen) {
553 len2 = (wlen > 2048) ? 2048 : wlen;
554 wlen -= len2;
5292bcd3 555 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
03718234 556 j += len2 << 1;
5292bcd3
JS		 557
558 writew(len2, baseAddr + loadlen);
559 writew(0, baseAddr + key);
560 for (i = 0; i < 100; i++) {
561 if (readw(baseAddr + key) == keycode)
03718234
JS		 562 break;
563 msleep(10);
564 }
5292bcd3 565 if (readw(baseAddr + key) != keycode)
03718234
JS		 566 return -EIO;
567 }
5292bcd3
JS		 568 writew(0, baseAddr + loadlen);
569 writew(usum, baseAddr + checksum);
570 writew(0, baseAddr + key);
571 for (i = 0; i < 100; i++) {
572 if (readw(baseAddr + key) == keycode)
03718234
JS		 573 break;
574 msleep(10);
575 }
576 retry++;
5292bcd3
JS		 577 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
578 if (readb(baseAddr + checksum_ok) != 1)
03718234
JS		 579 return -EIO;
580
5292bcd3 581 writew(0, baseAddr + key);
03718234
JS		 582 for (i = 0; i < 600; i++) {
583 if (readw(baseAddr + Magic_no) == Magic_code)
584 break;
585 msleep(10);
586 }
587 if (readw(baseAddr + Magic_no) != Magic_code)
588 return -EIO;
589
08d01c79 590 if (MOXA_IS_320(brd)) {
5292bcd3
JS		 591 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
592 writew(0x3800, baseAddr + TMS320_PORT1);
593 writew(0x3900, baseAddr + TMS320_PORT2);
594 writew(28499, baseAddr + TMS320_CLOCK);
595 } else {
596 writew(0x3200, baseAddr + TMS320_PORT1);
597 writew(0x3400, baseAddr + TMS320_PORT2);
598 writew(19999, baseAddr + TMS320_CLOCK);
599 }
03718234
JS		 600 }
601 writew(1, baseAddr + Disable_IRQ);
602 writew(0, baseAddr + Magic_no);
603 for (i = 0; i < 500; i++) {
604 if (readw(baseAddr + Magic_no) == Magic_code)
605 break;
606 msleep(10);
607 }
608 if (readw(baseAddr + Magic_no) != Magic_code)
609 return -EIO;
610
08d01c79 611 if (MOXA_IS_320(brd)) {
5292bcd3
JS		 612 j = readw(baseAddr + Module_cnt);
613 if (j <= 0)
614 return -EIO;
615 brd->numPorts = j * 8;
616 writew(j, baseAddr + Module_no);
617 writew(0, baseAddr + Magic_no);
618 for (i = 0; i < 600; i++) {
619 if (readw(baseAddr + Magic_no) == Magic_code)
620 break;
621 msleep(10);
622 }
623 if (readw(baseAddr + Magic_no) != Magic_code)
624 return -EIO;
03718234 625 }
03718234
JS		 626 brd->intNdx = baseAddr + IRQindex;
627 brd->intPend = baseAddr + IRQpending;
628 brd->intTable = baseAddr + IRQtable;
629
630 return 0;
631}
632
633static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
634 size_t len)
635{
636 void __iomem *ofsAddr, *baseAddr = brd->basemem;
637 struct moxa_port *port;
638 int retval, i;
639
640 if (len % 2) {
eaa95a8d 641 printk(KERN_ERR "MOXA: bios length is not even\n");
03718234
JS		 642 return -EINVAL;
643 }
644
5292bcd3
JS		 645 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
646 if (retval)
647 return retval;
648
03718234
JS		 649 switch (brd->boardType) {
650 case MOXA_BOARD_C218_ISA:
651 case MOXA_BOARD_C218_PCI:
652 case MOXA_BOARD_CP204J:
03718234
JS		 653 port = brd->ports;
654 for (i = 0; i < brd->numPorts; i++, port++) {
b4173f45 655 port->board = brd;
03718234
JS		 656 port->DCDState = 0;
657 port->tableAddr = baseAddr + Extern_table +
658 Extern_size * i;
659 ofsAddr = port->tableAddr;
660 writew(C218rx_mask, ofsAddr + RX_mask);
661 writew(C218tx_mask, ofsAddr + TX_mask);
662 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
663 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
664
665 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
666 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
667
668 }
669 break;
670 default:
03718234
JS		 671 port = brd->ports;
672 for (i = 0; i < brd->numPorts; i++, port++) {
b4173f45 673 port->board = brd;
03718234
JS		 674 port->DCDState = 0;
675 port->tableAddr = baseAddr + Extern_table +
676 Extern_size * i;
677 ofsAddr = port->tableAddr;
678 switch (brd->numPorts) {
679 case 8:
680 writew(C320p8rx_mask, ofsAddr + RX_mask);
681 writew(C320p8tx_mask, ofsAddr + TX_mask);
682 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
683 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
684 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
685 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
686
687 break;
688 case 16:
689 writew(C320p16rx_mask, ofsAddr + RX_mask);
690 writew(C320p16tx_mask, ofsAddr + TX_mask);
691 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
692 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
693 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
694 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
695 break;
696
697 case 24:
698 writew(C320p24rx_mask, ofsAddr + RX_mask);
699 writew(C320p24tx_mask, ofsAddr + TX_mask);
700 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
701 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
702 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
703 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
704 break;
705 case 32:
706 writew(C320p32rx_mask, ofsAddr + RX_mask);
707 writew(C320p32tx_mask, ofsAddr + TX_mask);
708 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
709 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
710 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
711 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
712 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
713 break;
714 }
715 }
716 break;
717 }
03718234
JS		 718 return 0;
719}
720
721static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
722{
723 void *ptr = fw->data;
724 char rsn[64];
725 u16 lens[5];
726 size_t len;
727 unsigned int a, lenp, lencnt;
728 int ret = -EINVAL;
729 struct {
730 __le32 magic; /* 0x34303430 */
731 u8 reserved1[2];
732 u8 type; /* UNIX = 3 */
733 u8 model; /* C218T=1, C320T=2, CP204=3 */
734 u8 reserved2[8];
735 __le16 len[5];
736 } *hdr = ptr;
737
738 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
739
740 if (fw->size < MOXA_FW_HDRLEN) {
741 strcpy(rsn, "too short (even header won't fit)");
742 goto err;
743 }
744 if (hdr->magic != cpu_to_le32(0x30343034)) {
745 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
746 goto err;
747 }
748 if (hdr->type != 3) {
749 sprintf(rsn, "not for linux, type is %u", hdr->type);
750 goto err;
751 }
752 if (moxa_check_fw_model(brd, hdr->model)) {
753 sprintf(rsn, "not for this card, model is %u", hdr->model);
754 goto err;
755 }
756
757 len = MOXA_FW_HDRLEN;
758 lencnt = hdr->model == 2 ? 5 : 3;
759 for (a = 0; a < ARRAY_SIZE(lens); a++) {
760 lens[a] = le16_to_cpu(hdr->len[a]);
761 if (lens[a] && len + lens[a] <= fw->size &&
762 moxa_check_fw(&fw->data[len]))
eaa95a8d 763 printk(KERN_WARNING "MOXA firmware: unexpected input "
03718234
JS		 764 "at offset %u, but going on\n", (u32)len);
765 if (!lens[a] && a < lencnt) {
766 sprintf(rsn, "too few entries in fw file");
767 goto err;
768 }
769 len += lens[a];
770 }
771
772 if (len != fw->size) {
773 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
774 (u32)len);
775 goto err;
776 }
777
778 ptr += MOXA_FW_HDRLEN;
779 lenp = 0; /* bios */
780
781 strcpy(rsn, "read above");
782
783 ret = moxa_load_bios(brd, ptr, lens[lenp]);
784 if (ret)
785 goto err;
786
787 /* we skip the tty section (lens[1]), since we don't need it */
788 ptr += lens[lenp] + lens[lenp + 1];
789 lenp += 2; /* comm */
790
791 if (hdr->model == 2) {
792 ret = moxa_load_320b(brd, ptr, lens[lenp]);
793 if (ret)
794 goto err;
795 /* skip another tty */
796 ptr += lens[lenp] + lens[lenp + 1];
797 lenp += 2;
798 }
799
800 ret = moxa_load_code(brd, ptr, lens[lenp]);
801 if (ret)
802 goto err;
803
804 return 0;
805err:
806 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
807 return ret;
808}
809
810static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
811{
812 const struct firmware *fw;
813 const char *file;
810ab09b
JS		 814 struct moxa_port *p;
815 unsigned int i;
03718234
JS		 816 int ret;
817
810ab09b
JS		 818 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
819 GFP_KERNEL);
820 if (brd->ports == NULL) {
821 printk(KERN_ERR "cannot allocate memory for ports\n");
822 ret = -ENOMEM;
823 goto err;
824 }
825
826 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
827 p->type = PORT_16550A;
828 p->close_delay = 5 * HZ / 10;
829 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
830 init_waitqueue_head(&p->open_wait);
810ab09b
JS		 831 }
832
03718234
JS		 833 switch (brd->boardType) {
834 case MOXA_BOARD_C218_ISA:
835 case MOXA_BOARD_C218_PCI:
836 file = "c218tunx.cod";
837 break;
838 case MOXA_BOARD_CP204J:
839 file = "cp204unx.cod";
840 break;
841 default:
842 file = "c320tunx.cod";
843 break;
844 }
845
846 ret = request_firmware(&fw, file, dev);
847 if (ret) {
848 printk(KERN_ERR "request_firmware failed\n");
810ab09b 849 goto err_free;
03718234
JS		 850 }
851
852 ret = moxa_load_fw(brd, fw);
853
854 release_firmware(fw);
810ab09b
JS		 855
856 if (ret)
857 goto err_free;
858
2a541341 859 spin_lock_bh(&moxa_lock);
810ab09b 860 brd->ready = 1;
0bcc4caa
JS		 861 if (!timer_pending(&moxaTimer))
862 mod_timer(&moxaTimer, jiffies + HZ / 50);
2a541341 863 spin_unlock_bh(&moxa_lock);
0bcc4caa 864
810ab09b
JS		 865 return 0;
866err_free:
867 kfree(brd->ports);
868err:
03718234
JS		 869 return ret;
870}
871
810ab09b
JS		 872static void moxa_board_deinit(struct moxa_board_conf *brd)
873{
a8f5cda0
JS		 874 unsigned int a, opened;
875
876 mutex_lock(&moxa_openlock);
7bcf97d1 877 spin_lock_bh(&moxa_lock);
810ab09b 878 brd->ready = 0;
7bcf97d1 879 spin_unlock_bh(&moxa_lock);
a8f5cda0
JS		 880
881 /* pci hot-un-plug support */
882 for (a = 0; a < brd->numPorts; a++)
883 if (brd->ports[a].asyncflags & ASYNC_INITIALIZED)
884 tty_hangup(brd->ports[a].tty);
885 while (1) {
886 opened = 0;
887 for (a = 0; a < brd->numPorts; a++)
888 if (brd->ports[a].asyncflags & ASYNC_INITIALIZED)
889 opened++;
890 mutex_unlock(&moxa_openlock);
891 if (!opened)
892 break;
893 msleep(50);
894 mutex_lock(&moxa_openlock);
895 }
896
810ab09b
JS		 897 iounmap(brd->basemem);
898 brd->basemem = NULL;
899 kfree(brd->ports);
900}
901
1da177e4 902#ifdef CONFIG_PCI
9cde5bf0
JS		 903static int __devinit moxa_pci_probe(struct pci_dev *pdev,
904 const struct pci_device_id *ent)
1da177e4 905{
9cde5bf0
JS		 906 struct moxa_board_conf *board;
907 unsigned int i;
908 int board_type = ent->driver_data;
909 int retval;
910
911 retval = pci_enable_device(pdev);
7aeb95da
JS		 912 if (retval) {
913 dev_err(&pdev->dev, "can't enable pci device\n");
9cde5bf0 914 goto err;
7aeb95da 915 }
9cde5bf0
JS		 916
917 for (i = 0; i < MAX_BOARDS; i++)
918 if (moxa_boards[i].basemem == NULL)
919 break;
920
921 retval = -ENODEV;
922 if (i >= MAX_BOARDS) {
7aeb95da 923 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
9cde5bf0
JS		 924 "found. Board is ignored.\n", MAX_BOARDS);
925 goto err;
926 }
927
928 board = &moxa_boards[i];
e46a5e3f
JS		 929
930 retval = pci_request_region(pdev, 2, "moxa-base");
931 if (retval) {
932 dev_err(&pdev->dev, "can't request pci region 2\n");
933 goto err;
934 }
935
936 board->basemem = ioremap(pci_resource_start(pdev, 2), 0x4000);
7aeb95da
JS		 937 if (board->basemem == NULL) {
938 dev_err(&pdev->dev, "can't remap io space 2\n");
e46a5e3f 939 goto err_reg;
7aeb95da 940 }
9cde5bf0 941
1da177e4
LT		 942 board->boardType = board_type;
943 switch (board_type) {
944 case MOXA_BOARD_C218_ISA:
945 case MOXA_BOARD_C218_PCI:
946 board->numPorts = 8;
947 break;
948
949 case MOXA_BOARD_CP204J:
950 board->numPorts = 4;
951 break;
952 default:
953 board->numPorts = 0;
954 break;
955 }
956 board->busType = MOXA_BUS_TYPE_PCI;
a784bf7c 957
03718234
JS		 958 retval = moxa_init_board(board, &pdev->dev);
959 if (retval)
960 goto err_base;
961
9cde5bf0 962 pci_set_drvdata(pdev, board);
1da177e4 963
bb9f910a
JS		 964 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
965 moxa_brdname[board_type - 1], board->numPorts);
966
eaa95a8d 967 return 0;
03718234
JS		 968err_base:
969 iounmap(board->basemem);
970 board->basemem = NULL;
e46a5e3f
JS		 971err_reg:
972 pci_release_region(pdev, 2);
9cde5bf0
JS		 973err:
974 return retval;
975}
976
977static void __devexit moxa_pci_remove(struct pci_dev *pdev)
978{
979 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
980
810ab09b
JS		 981 moxa_board_deinit(brd);
982
e46a5e3f 983 pci_release_region(pdev, 2);
1da177e4 984}
a784bf7c
JS		 985
986static struct pci_driver moxa_pci_driver = {
987 .name = "moxa",
988 .id_table = moxa_pcibrds,
989 .probe = moxa_pci_probe,
990 .remove = __devexit_p(moxa_pci_remove)
991};
1da177e4
LT		 992#endif /* CONFIG_PCI */
993
994static int __init moxa_init(void)
995{
810ab09b 996 unsigned int isabrds = 0;
d353eca4 997 int retval = 0;
1da177e4 998
7aeb95da
JS		 999 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
1000 MOXA_VERSION);
1da177e4
LT		 1001 moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
1002 if (!moxaDriver)
1003 return -ENOMEM;
1004
1da177e4 1005 moxaDriver->owner = THIS_MODULE;
9b4e3b13 1006 moxaDriver->name = "ttyMX";
1da177e4
LT		 1007 moxaDriver->major = ttymajor;
1008 moxaDriver->minor_start = 0;
1009 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
1010 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
1011 moxaDriver->init_termios = tty_std_termios;
1da177e4 1012 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
606d099c
AC		 1013 moxaDriver->init_termios.c_ispeed = 9600;
1014 moxaDriver->init_termios.c_ospeed = 9600;
1da177e4
LT		 1015 moxaDriver->flags = TTY_DRIVER_REAL_RAW;
1016 tty_set_operations(moxaDriver, &moxa_ops);
1017
1da177e4 1018 if (tty_register_driver(moxaDriver)) {
eaa95a8d 1019 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
1da177e4
LT		 1020 put_tty_driver(moxaDriver);
1021 return -1;
1022 }
1da177e4 1023
d353eca4 1024 /* Find the boards defined from module args. */
1da177e4 1025#ifdef MODULE
d353eca4
JS		 1026 {
1027 struct moxa_board_conf *brd = moxa_boards;
810ab09b 1028 unsigned int i;
1da177e4 1029 for (i = 0; i < MAX_BOARDS; i++) {
d353eca4
JS		 1030 if (!baseaddr[i])
1031 break;
1032 if (type[i] == MOXA_BOARD_C218_ISA ||
1033 type[i] == MOXA_BOARD_C320_ISA) {
7aeb95da 1034 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
d353eca4
JS		 1035 isabrds + 1, moxa_brdname[type[i] - 1],
1036 baseaddr[i]);
1037 brd->boardType = type[i];
1038 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
1039 numports[i];
1040 brd->busType = MOXA_BUS_TYPE_ISA;
1041 brd->basemem = ioremap(baseaddr[i], 0x4000);
1042 if (!brd->basemem) {
eaa95a8d 1043 printk(KERN_ERR "MOXA: can't remap %lx\n",
d353eca4 1044 baseaddr[i]);
1da177e4
LT		 1045 continue;
1046 }
03718234
JS		 1047 if (moxa_init_board(brd, NULL)) {
1048 iounmap(brd->basemem);
1049 brd->basemem = NULL;
1050 continue;
1051 }
d353eca4 1052
bb9f910a
JS		 1053 printk(KERN_INFO "MOXA isa board found at 0x%.8lu and "
1054 "ready (%u ports, firmware loaded)\n",
1055 baseaddr[i], brd->numPorts);
1056
d353eca4
JS		 1057 brd++;
1058 isabrds++;
1da177e4
LT		 1059 }
1060 }
d353eca4 1061 }
1da177e4 1062#endif
a784bf7c 1063
1da177e4 1064#ifdef CONFIG_PCI
a784bf7c
JS		 1065 retval = pci_register_driver(&moxa_pci_driver);
1066 if (retval) {
eaa95a8d 1067 printk(KERN_ERR "Can't register MOXA pci driver!\n");
d353eca4 1068 if (isabrds)
a784bf7c 1069 retval = 0;
1da177e4
LT		 1070 }
1071#endif
a784bf7c 1072
a784bf7c 1073 return retval;
1da177e4
LT		 1074}
1075
1076static void __exit moxa_exit(void)
1077{
eaa95a8d 1078 unsigned int i;
1da177e4 1079
9cde5bf0 1080#ifdef CONFIG_PCI
a784bf7c 1081 pci_unregister_driver(&moxa_pci_driver);
9cde5bf0 1082#endif
a784bf7c 1083
810ab09b
JS		 1084 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
1085 if (moxa_boards[i].ready)
1086 moxa_board_deinit(&moxa_boards[i]);
2a541341
JS		 1087
1088 del_timer_sync(&moxaTimer);
1089
1090 if (tty_unregister_driver(moxaDriver))
1091 printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
1092 "serial driver\n");
1093 put_tty_driver(moxaDriver);
1da177e4
LT		 1094}
1095
1096module_init(moxa_init);
1097module_exit(moxa_exit);
1098
a8f5cda0
JS		 1099static void moxa_close_port(struct moxa_port *ch)
1100{
1101 moxa_shut_down(ch);
1102 MoxaPortFlushData(ch, 2);
1103 ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE;
1104 ch->tty->driver_data = NULL;
1105 ch->tty = NULL;
1106}
1107
1108static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,
1109 struct moxa_port *ch)
1110{
1111 DEFINE_WAIT(wait);
1112 int retval = 0;
1113 u8 dcd;
1114
1115 while (1) {
1116 prepare_to_wait(&ch->open_wait, &wait, TASK_INTERRUPTIBLE);
1117 if (tty_hung_up_p(filp)) {
1118#ifdef SERIAL_DO_RESTART
1119 retval = -ERESTARTSYS;
1120#else
1121 retval = -EAGAIN;
1122#endif
1123 break;
1124 }
1125 spin_lock_bh(&moxa_lock);
1126 dcd = ch->DCDState;
1127 spin_unlock_bh(&moxa_lock);
1128 if (dcd)
1129 break;
1130
1131 if (signal_pending(current)) {
1132 retval = -ERESTARTSYS;
1133 break;
1134 }
1135 schedule();
1136 }
1137 finish_wait(&ch->open_wait, &wait);
1138
1139 return retval;
1140}
1141
1da177e4
LT		 1142static int moxa_open(struct tty_struct *tty, struct file *filp)
1143{
810ab09b 1144 struct moxa_board_conf *brd;
8f8ecbad 1145 struct moxa_port *ch;
1da177e4
LT		 1146 int port;
1147 int retval;
1da177e4 1148
11324edd 1149 port = tty->index;
1da177e4 1150 if (port == MAX_PORTS) {
74d7d97b 1151 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
1da177e4 1152 }
a8f5cda0
JS		 1153 if (mutex_lock_interruptible(&moxa_openlock))
1154 return -ERESTARTSYS;
810ab09b 1155 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
a8f5cda0
JS		 1156 if (!brd->ready) {
1157 mutex_unlock(&moxa_openlock);
810ab09b 1158 return -ENODEV;
a8f5cda0 1159 }
1da177e4 1160
810ab09b 1161 ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
1da177e4
LT		 1162 ch->count++;
1163 tty->driver_data = ch;
1164 ch->tty = tty;
1165 if (!(ch->asyncflags & ASYNC_INITIALIZED)) {
1166 ch->statusflags = 0;
db1acaa6 1167 moxa_set_tty_param(tty, tty->termios);
b4173f45
JS		 1168 MoxaPortLineCtrl(ch, 1, 1);
1169 MoxaPortEnable(ch);
a8f5cda0 1170 MoxaSetFifo(ch, ch->type == PORT_16550A);
1da177e4
LT		 1171 ch->asyncflags |= ASYNC_INITIALIZED;
1172 }
a8f5cda0 1173 mutex_unlock(&moxa_openlock);
1da177e4 1174
a8f5cda0
JS		 1175 retval = 0;
1176 if (!(filp->f_flags & O_NONBLOCK) && !C_CLOCAL(tty))
1177 retval = moxa_block_till_ready(tty, filp, ch);
1178 mutex_lock(&moxa_openlock);
1179 if (retval) {
1180 if (ch->count) /* 0 means already hung up... */
1181 if (--ch->count == 0)
1182 moxa_close_port(ch);
1183 } else
1184 ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
1185 mutex_unlock(&moxa_openlock);
1da177e4 1186
a8f5cda0 1187 return retval;
1da177e4
LT		 1188}
1189
1190static void moxa_close(struct tty_struct *tty, struct file *filp)
1191{
8f8ecbad 1192 struct moxa_port *ch;
1da177e4
LT		 1193 int port;
1194
11324edd 1195 port = tty->index;
a8f5cda0 1196 if (port == MAX_PORTS || tty_hung_up_p(filp))
1da177e4 1197 return;
1da177e4 1198
a8f5cda0
JS		 1199 mutex_lock(&moxa_openlock);
1200 ch = tty->driver_data;
1201 if (ch == NULL)
1202 goto unlock;
1203 if (tty->count == 1 && ch->count != 1) {
7aeb95da
JS		 1204 printk(KERN_WARNING "moxa_close: bad serial port count; "
1205 "tty->count is 1, ch->count is %d\n", ch->count);
1da177e4
LT		 1206 ch->count = 1;
1207 }
1208 if (--ch->count < 0) {
7aeb95da
JS		 1209 printk(KERN_WARNING "moxa_close: bad serial port count, "
1210 "device=%s\n", tty->name);
1da177e4
LT		 1211 ch->count = 0;
1212 }
a8f5cda0
JS		 1213 if (ch->count)
1214 goto unlock;
1da177e4
LT		 1215
1216 ch->cflag = tty->termios->c_cflag;
1217 if (ch->asyncflags & ASYNC_INITIALIZED) {
6f56b658 1218 moxa_setup_empty_event(tty);
1da177e4 1219 tty_wait_until_sent(tty, 30 * HZ); /* 30 seconds timeout */
1da177e4 1220 }
1da177e4 1221
a8f5cda0
JS		 1222 moxa_close_port(ch);
1223unlock:
1224 mutex_unlock(&moxa_openlock);
1da177e4
LT		 1225}
1226
1227static int moxa_write(struct tty_struct *tty,
1228 const unsigned char *buf, int count)
1229{
b4173f45 1230 struct moxa_port *ch = tty->driver_data;
b4173f45 1231 int len;
1da177e4 1232
1da177e4 1233 if (ch == NULL)
b4173f45 1234 return 0;
33f0f88f 1235
7bcf97d1 1236 spin_lock_bh(&moxa_lock);
2108eba5 1237 len = MoxaPortWriteData(ch, buf, count);
7bcf97d1 1238 spin_unlock_bh(&moxa_lock);
1da177e4 1239
1da177e4 1240 ch->statusflags |= LOWWAIT;
eaa95a8d 1241 return len;
1da177e4
LT		 1242}
1243
1244static int moxa_write_room(struct tty_struct *tty)
1245{
8f8ecbad 1246 struct moxa_port *ch;
1da177e4
LT		 1247
1248 if (tty->stopped)
eaa95a8d 1249 return 0;
b4173f45 1250 ch = tty->driver_data;
1da177e4 1251 if (ch == NULL)
eaa95a8d 1252 return 0;
b4173f45 1253 return MoxaPortTxFree(ch);
1da177e4
LT		 1254}
1255
1256static void moxa_flush_buffer(struct tty_struct *tty)
1257{
b4173f45 1258 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1259
1260 if (ch == NULL)
1261 return;
b4173f45 1262 MoxaPortFlushData(ch, 1);
1da177e4
LT		 1263 tty_wakeup(tty);
1264}
1265
1266static int moxa_chars_in_buffer(struct tty_struct *tty)
1267{
b4173f45 1268 struct moxa_port *ch = tty->driver_data;
1da177e4 1269 int chars;
1da177e4
LT		 1270
1271 /*
1272 * Sigh...I have to check if driver_data is NULL here, because
1273 * if an open() fails, the TTY subsystem eventually calls
1274 * tty_wait_until_sent(), which calls the driver's chars_in_buffer()
1275 * routine. And since the open() failed, we return 0 here. TDJ
1276 */
1277 if (ch == NULL)
eaa95a8d 1278 return 0;
b4173f45 1279 chars = MoxaPortTxQueue(ch);
1da177e4
LT		 1280 if (chars) {
1281 /*
1282 * Make it possible to wakeup anything waiting for output
1283 * in tty_ioctl.c, etc.
1284 */
1285 if (!(ch->statusflags & EMPTYWAIT))
6f56b658 1286 moxa_setup_empty_event(tty);
1da177e4 1287 }
eaa95a8d 1288 return chars;
1da177e4
LT		 1289}
1290
1da177e4
LT		 1291static int moxa_tiocmget(struct tty_struct *tty, struct file *file)
1292{
a8f5cda0 1293 struct moxa_port *ch;
1da177e4
LT		 1294 int flag = 0, dtr, rts;
1295
a8f5cda0
JS		 1296 mutex_lock(&moxa_openlock);
1297 ch = tty->driver_data;
1298 if (!ch) {
1299 mutex_unlock(&moxa_openlock);
74d7d97b 1300 return -EINVAL;
a8f5cda0 1301 }
1da177e4 1302
b4173f45 1303 MoxaPortGetLineOut(ch, &dtr, &rts);
1da177e4
LT		 1304 if (dtr)
1305 flag |= TIOCM_DTR;
1306 if (rts)
1307 flag |= TIOCM_RTS;
b4173f45 1308 dtr = MoxaPortLineStatus(ch);
1da177e4
LT		 1309 if (dtr & 1)
1310 flag |= TIOCM_CTS;
1311 if (dtr & 2)
1312 flag |= TIOCM_DSR;
1313 if (dtr & 4)
1314 flag |= TIOCM_CD;
a8f5cda0 1315 mutex_unlock(&moxa_openlock);
1da177e4
LT		 1316 return flag;
1317}
1318
1319static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
1320 unsigned int set, unsigned int clear)
1321{
a8f5cda0 1322 struct moxa_port *ch;
1da177e4
LT		 1323 int port;
1324 int dtr, rts;
1325
11324edd 1326 port = tty->index;
a8f5cda0
JS		 1327 mutex_lock(&moxa_openlock);
1328 ch = tty->driver_data;
1329 if (!ch) {
1330 mutex_unlock(&moxa_openlock);
74d7d97b 1331 return -EINVAL;
a8f5cda0 1332 }
1da177e4 1333
b4173f45 1334 MoxaPortGetLineOut(ch, &dtr, &rts);
1da177e4
LT		 1335 if (set & TIOCM_RTS)
1336 rts = 1;
1337 if (set & TIOCM_DTR)
1338 dtr = 1;
1339 if (clear & TIOCM_RTS)
1340 rts = 0;
1341 if (clear & TIOCM_DTR)
1342 dtr = 0;
b4173f45 1343 MoxaPortLineCtrl(ch, dtr, rts);
a8f5cda0 1344 mutex_unlock(&moxa_openlock);
1da177e4
LT		 1345 return 0;
1346}
1347
1da177e4
LT		 1348static void moxa_throttle(struct tty_struct *tty)
1349{
eaa95a8d 1350 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1351
1352 ch->statusflags |= THROTTLE;
1353}
1354
1355static void moxa_unthrottle(struct tty_struct *tty)
1356{
eaa95a8d 1357 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1358
1359 ch->statusflags &= ~THROTTLE;
1360}
1361
1362static void moxa_set_termios(struct tty_struct *tty,
eaa95a8d 1363 struct ktermios *old_termios)
1da177e4 1364{
eaa95a8d 1365 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1366
1367 if (ch == NULL)
1368 return;
db1acaa6 1369 moxa_set_tty_param(tty, old_termios);
eaa95a8d 1370 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
1da177e4
LT		 1371 wake_up_interruptible(&ch->open_wait);
1372}
1373
1374static void moxa_stop(struct tty_struct *tty)
1375{
eaa95a8d 1376 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1377
1378 if (ch == NULL)
1379 return;
b4173f45 1380 MoxaPortTxDisable(ch);
1da177e4
LT		 1381 ch->statusflags |= TXSTOPPED;
1382}
1383
1384
1385static void moxa_start(struct tty_struct *tty)
1386{
eaa95a8d 1387 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1388
1389 if (ch == NULL)
1390 return;
1391
1392 if (!(ch->statusflags & TXSTOPPED))
1393 return;
1394
b4173f45 1395 MoxaPortTxEnable(ch);
1da177e4
LT		 1396 ch->statusflags &= ~TXSTOPPED;
1397}
1398
1399static void moxa_hangup(struct tty_struct *tty)
1400{
a8f5cda0 1401 struct moxa_port *ch;
1da177e4 1402
a8f5cda0
JS		 1403 mutex_lock(&moxa_openlock);
1404 ch = tty->driver_data;
1405 if (ch == NULL) {
1406 mutex_unlock(&moxa_openlock);
1407 return;
1408 }
1da177e4 1409 ch->count = 0;
a8f5cda0
JS		 1410 moxa_close_port(ch);
1411 mutex_unlock(&moxa_openlock);
1412
1da177e4
LT		 1413 wake_up_interruptible(&ch->open_wait);
1414}
1415
7bcf97d1 1416static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
1da177e4 1417{
7bcf97d1 1418 dcd = !!dcd;
1da177e4 1419
eaa95a8d 1420 if (dcd != p->DCDState && p->tty && C_CLOCAL(p->tty)) {
a8f5cda0 1421 if (!dcd)
7bcf97d1 1422 tty_hangup(p->tty);
7bcf97d1
JS		 1423 }
1424 p->DCDState = dcd;
1425}
1da177e4 1426
7bcf97d1
JS		 1427static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
1428 u16 __iomem *ip)
1429{
1430 struct tty_struct *tty = p->tty;
1431 void __iomem *ofsAddr;
1432 unsigned int inited = p->asyncflags & ASYNC_INITIALIZED;
1433 u16 intr;
1434
1435 if (tty) {
1436 if ((p->statusflags & EMPTYWAIT) &&
1437 MoxaPortTxQueue(p) == 0) {
1438 p->statusflags &= ~EMPTYWAIT;
1439 tty_wakeup(tty);
1440 }
1441 if ((p->statusflags & LOWWAIT) && !tty->stopped &&
1442 MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
1443 p->statusflags &= ~LOWWAIT;
1444 tty_wakeup(tty);
1445 }
1446
1447 if (inited && !(p->statusflags & THROTTLE) &&
1448 MoxaPortRxQueue(p) > 0) { /* RX */
1449 MoxaPortReadData(p);
1450 tty_schedule_flip(tty);
1451 }
1452 } else {
1453 p->statusflags &= ~EMPTYWAIT;
1454 MoxaPortFlushData(p, 0); /* flush RX */
1da177e4 1455 }
0bcc4caa 1456
7bcf97d1
JS		 1457 if (!handle) /* nothing else to do */
1458 return 0;
1459
1460 intr = readw(ip); /* port irq status */
1461 if (intr == 0)
1462 return 0;
1463
1464 writew(0, ip); /* ACK port */
1465 ofsAddr = p->tableAddr;
1466 if (intr & IntrTx) /* disable tx intr */
1467 writew(readw(ofsAddr + HostStat) & ~WakeupTx,
1468 ofsAddr + HostStat);
1469
1470 if (!inited)
1471 return 0;
1472
1473 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
1474 tty_insert_flip_char(tty, 0, TTY_BREAK);
1475 tty_schedule_flip(tty);
1476 }
1477
1478 if (intr & IntrLine)
1479 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
1480
1481 return 0;
1482}
1483
1484static void moxa_poll(unsigned long ignored)
1485{
1486 struct moxa_board_conf *brd;
1487 u16 __iomem *ip;
2a541341 1488 unsigned int card, port, served = 0;
7bcf97d1
JS		 1489
1490 spin_lock(&moxa_lock);
1da177e4 1491 for (card = 0; card < MAX_BOARDS; card++) {
7bcf97d1
JS		 1492 brd = &moxa_boards[card];
1493 if (!brd->ready)
1da177e4 1494 continue;
7bcf97d1 1495
2a541341
JS		 1496 served++;
1497
7bcf97d1
JS		 1498 ip = NULL;
1499 if (readb(brd->intPend) == 0xff)
1500 ip = brd->intTable + readb(brd->intNdx);
1501
1502 for (port = 0; port < brd->numPorts; port++)
1503 moxa_poll_port(&brd->ports[port], !!ip, ip + port);
1504
1505 if (ip)
1506 writeb(0, brd->intPend); /* ACK */
1507
1508 if (moxaLowWaterChk) {
1509 struct moxa_port *p = brd->ports;
1510 for (port = 0; port < brd->numPorts; port++, p++)
1511 if (p->lowChkFlag) {
1512 p->lowChkFlag = 0;
1513 moxa_low_water_check(p->tableAddr);
1da177e4 1514 }
1da177e4
LT		 1515 }
1516 }
7bcf97d1 1517 moxaLowWaterChk = 0;
1da177e4 1518
2a541341
JS		 1519 if (served)
1520 mod_timer(&moxaTimer, jiffies + HZ / 50);
1521 spin_unlock(&moxa_lock);
1da177e4
LT		 1522}
1523
1524/******************************************************************************/
1525
db1acaa6 1526static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4 1527{
eaa95a8d
JS		 1528 register struct ktermios *ts = tty->termios;
1529 struct moxa_port *ch = tty->driver_data;
db1acaa6 1530 int rts, cts, txflow, rxflow, xany, baud;
1da177e4 1531
1da177e4
LT		 1532 rts = cts = txflow = rxflow = xany = 0;
1533 if (ts->c_cflag & CRTSCTS)
1534 rts = cts = 1;
1535 if (ts->c_iflag & IXON)
1536 txflow = 1;
1537 if (ts->c_iflag & IXOFF)
1538 rxflow = 1;
1539 if (ts->c_iflag & IXANY)
1540 xany = 1;
db1acaa6
AC		 1541
1542 /* Clear the features we don't support */
1543 ts->c_cflag &= ~CMSPAR;
b4173f45
JS		 1544 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1545 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
db1acaa6
AC		 1546 if (baud == -1)
1547 baud = tty_termios_baud_rate(old_termios);
1548 /* Not put the baud rate into the termios data */
1549 tty_encode_baud_rate(tty, baud, baud);
1da177e4
LT		 1550}
1551
6f56b658 1552static void moxa_setup_empty_event(struct tty_struct *tty)
1da177e4 1553{
8f8ecbad 1554 struct moxa_port *ch = tty->driver_data;
1da177e4 1555
7bcf97d1 1556 spin_lock_bh(&moxa_lock);
1da177e4 1557 ch->statusflags |= EMPTYWAIT;
7bcf97d1 1558 spin_unlock_bh(&moxa_lock);
1da177e4
LT		 1559}
1560
6f56b658 1561static void moxa_shut_down(struct moxa_port *ch)
1da177e4 1562{
a8f5cda0 1563 struct tty_struct *tp = ch->tty;
1da177e4
LT		 1564
1565 if (!(ch->asyncflags & ASYNC_INITIALIZED))
1566 return;
1567
b4173f45 1568 MoxaPortDisable(ch);
1da177e4
LT		 1569
1570 /*
1571 * If we're a modem control device and HUPCL is on, drop RTS & DTR.
1572 */
a8f5cda0 1573 if (C_HUPCL(tp))
b4173f45 1574 MoxaPortLineCtrl(ch, 0, 0);
1da177e4 1575
a8f5cda0 1576 spin_lock_bh(&moxa_lock);
1da177e4 1577 ch->asyncflags &= ~ASYNC_INITIALIZED;
a8f5cda0 1578 spin_unlock_bh(&moxa_lock);
1da177e4
LT		 1579}
1580
1da177e4
LT		 1581/*****************************************************************************
1582 * Driver level functions: *
1da177e4 1583 *****************************************************************************/
1da177e4 1584
b4173f45 1585static void MoxaPortFlushData(struct moxa_port *port, int mode)
1da177e4
LT		 1586{
1587 void __iomem *ofsAddr;
eaa95a8d 1588 if (mode < 0 || mode > 2)
1da177e4 1589 return;
b4173f45 1590 ofsAddr = port->tableAddr;
1da177e4
LT		 1591 moxafunc(ofsAddr, FC_FlushQueue, mode);
1592 if (mode != 1) {
b4173f45 1593 port->lowChkFlag = 0;
6f56b658 1594 moxa_low_water_check(ofsAddr);
1da177e4
LT		 1595 }
1596}
1597
1da177e4
LT		 1598/*
1599 * Moxa Port Number Description:
1600 *
1601 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1602 * the port number using in MOXA driver functions will be 0 to 31 for
1603 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1604 * to 127 for fourth. For example, if you setup three MOXA boards,
1605 * first board is C218, second board is C320-16 and third board is
1606 * C320-32. The port number of first board (C218 - 8 ports) is from
1607 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1608 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1609 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1610 * 127 will be invalid.
1611 *
1612 *
1613 * Moxa Functions Description:
1614 *
1615 * Function 1: Driver initialization routine, this routine must be
1616 * called when initialized driver.
1617 * Syntax:
1618 * void MoxaDriverInit();
1619 *
1620 *
1621 * Function 2: Moxa driver private IOCTL command processing.
1622 * Syntax:
1623 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1624 *
1625 * unsigned int cmd : IOCTL command
1626 * unsigned long arg : IOCTL argument
1627 * int port : port number (0 - 127)
1628 *
1629 * return: 0 (OK)
1630 * -EINVAL
1631 * -ENOIOCTLCMD
1632 *
1633 *
1da177e4
LT		 1634 * Function 6: Enable this port to start Tx/Rx data.
1635 * Syntax:
1636 * void MoxaPortEnable(int port);
1637 * int port : port number (0 - 127)
1638 *
1639 *
1640 * Function 7: Disable this port
1641 * Syntax:
1642 * void MoxaPortDisable(int port);
1643 * int port : port number (0 - 127)
1644 *
1645 *
1da177e4
LT		 1646 * Function 10: Setting baud rate of this port.
1647 * Syntax:
08d01c79 1648 * speed_t MoxaPortSetBaud(int port, speed_t baud);
1da177e4
LT		 1649 * int port : port number (0 - 127)
1650 * long baud : baud rate (50 - 115200)
1651 *
1652 * return: 0 : this port is invalid or baud < 50
1653 * 50 - 115200 : the real baud rate set to the port, if
1654 * the argument baud is large than maximun
1655 * available baud rate, the real setting
1656 * baud rate will be the maximun baud rate.
1657 *
1658 *
1da177e4
LT		 1659 * Function 12: Configure the port.
1660 * Syntax:
606d099c 1661 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1da177e4 1662 * int port : port number (0 - 127)
606d099c 1663 * struct ktermios * termio : termio structure pointer
c7bce309 1664 * speed_t baud : baud rate
1da177e4
LT		 1665 *
1666 * return: -1 : this port is invalid or termio == NULL
1667 * 0 : setting O.K.
1668 *
1669 *
1670 * Function 13: Get the DTR/RTS state of this port.
1671 * Syntax:
1672 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1673 * int port : port number (0 - 127)
1674 * int * dtrState : pointer to INT to receive the current DTR
1675 * state. (if NULL, this function will not
1676 * write to this address)
1677 * int * rtsState : pointer to INT to receive the current RTS
1678 * state. (if NULL, this function will not
1679 * write to this address)
1680 *
1681 * return: -1 : this port is invalid
1682 * 0 : O.K.
1683 *
1684 *
1685 * Function 14: Setting the DTR/RTS output state of this port.
1686 * Syntax:
1687 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1688 * int port : port number (0 - 127)
1689 * int dtrState : DTR output state (0: off, 1: on)
1690 * int rtsState : RTS output state (0: off, 1: on)
1691 *
1692 *
1693 * Function 15: Setting the flow control of this port.
1694 * Syntax:
1695 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1696 * int txFlow,int xany);
1697 * int port : port number (0 - 127)
1698 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1699 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1700 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1701 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1702 * int xany : S/W XANY flow control (0: no, 1: yes)
1703 *
1704 *
1705 * Function 16: Get ths line status of this port
1706 * Syntax:
1707 * int MoxaPortLineStatus(int port);
1708 * int port : port number (0 - 127)
1709 *
1710 * return: Bit 0 - CTS state (0: off, 1: on)
1711 * Bit 1 - DSR state (0: off, 1: on)
1712 * Bit 2 - DCD state (0: off, 1: on)
1713 *
1714 *
1da177e4
LT		 1715 * Function 19: Flush the Rx/Tx buffer data of this port.
1716 * Syntax:
1717 * void MoxaPortFlushData(int port, int mode);
1718 * int port : port number (0 - 127)
1719 * int mode
1720 * 0 : flush the Rx buffer
1721 * 1 : flush the Tx buffer
1722 * 2 : flush the Rx and Tx buffer
1723 *
1724 *
1725 * Function 20: Write data.
1726 * Syntax:
1727 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1728 * int port : port number (0 - 127)
1729 * unsigned char * buffer : pointer to write data buffer.
1730 * int length : write data length
1731 *
1732 * return: 0 - length : real write data length
1733 *
1734 *
1735 * Function 21: Read data.
1736 * Syntax:
33f0f88f 1737 * int MoxaPortReadData(int port, struct tty_struct *tty);
1da177e4 1738 * int port : port number (0 - 127)
33f0f88f 1739 * struct tty_struct *tty : tty for data
1da177e4
LT		 1740 *
1741 * return: 0 - length : real read data length
1742 *
1743 *
1da177e4
LT		 1744 * Function 24: Get the Tx buffer current queued data bytes
1745 * Syntax:
1746 * int MoxaPortTxQueue(int port);
1747 * int port : port number (0 - 127)
1748 *
1749 * return: .. : Tx buffer current queued data bytes
1750 *
1751 *
1752 * Function 25: Get the Tx buffer current free space
1753 * Syntax:
1754 * int MoxaPortTxFree(int port);
1755 * int port : port number (0 - 127)
1756 *
1757 * return: .. : Tx buffer current free space
1758 *
1759 *
1760 * Function 26: Get the Rx buffer current queued data bytes
1761 * Syntax:
1762 * int MoxaPortRxQueue(int port);
1763 * int port : port number (0 - 127)
1764 *
1765 * return: .. : Rx buffer current queued data bytes
1766 *
1767 *
1da177e4
LT		 1768 * Function 28: Disable port data transmission.
1769 * Syntax:
1770 * void MoxaPortTxDisable(int port);
1771 * int port : port number (0 - 127)
1772 *
1773 *
1774 * Function 29: Enable port data transmission.
1775 * Syntax:
1776 * void MoxaPortTxEnable(int port);
1777 * int port : port number (0 - 127)
1778 *
1779 *
1da177e4
LT		 1780 * Function 31: Get the received BREAK signal count and reset it.
1781 * Syntax:
1782 * int MoxaPortResetBrkCnt(int port);
1783 * int port : port number (0 - 127)
1784 *
1785 * return: 0 - .. : BREAK signal count
1786 *
1787 *
1da177e4 1788 */
1da177e4 1789
b4173f45 1790static void MoxaPortEnable(struct moxa_port *port)
1da177e4
LT		 1791{
1792 void __iomem *ofsAddr;
eaa95a8d 1793 u16 lowwater = 512;
1da177e4 1794
b4173f45 1795 ofsAddr = port->tableAddr;
1da177e4 1796 writew(lowwater, ofsAddr + Low_water);
08d01c79 1797 if (MOXA_IS_320(port->board))
1da177e4 1798 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
eaa95a8d
JS		 1799 else
1800 writew(readw(ofsAddr + HostStat) | WakeupBreak,
1801 ofsAddr + HostStat);
1da177e4
LT		 1802
1803 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
1804 moxafunc(ofsAddr, FC_FlushQueue, 2);
1805
1806 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
1807 MoxaPortLineStatus(port);
1808}
1809
b4173f45 1810static void MoxaPortDisable(struct moxa_port *port)
1da177e4 1811{
b4173f45 1812 void __iomem *ofsAddr = port->tableAddr;
1da177e4
LT		 1813
1814 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
1815 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
1816 writew(0, ofsAddr + HostStat);
1817 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
1818}
1819
08d01c79 1820static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
1da177e4 1821{
08d01c79
JS		 1822 void __iomem *ofsAddr = port->tableAddr;
1823 unsigned int clock, val;
1824 speed_t max;
1da177e4 1825
08d01c79
JS		 1826 max = MOXA_IS_320(port->board) ? 460800 : 921600;
1827 if (baud < 50)
eaa95a8d 1828 return 0;
1da177e4
LT		 1829 if (baud > max)
1830 baud = max;
08d01c79 1831 clock = 921600;
1da177e4
LT		 1832 val = clock / baud;
1833 moxafunc(ofsAddr, FC_SetBaud, val);
1834 baud = clock / val;
eaa95a8d 1835 return baud;
1da177e4
LT		 1836}
1837
b4173f45
JS		 1838static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
1839 speed_t baud)
1da177e4
LT		 1840{
1841 void __iomem *ofsAddr;
1842 tcflag_t cflag;
1da177e4
LT		 1843 tcflag_t mode = 0;
1844
b4173f45 1845 ofsAddr = port->tableAddr;
1da177e4
LT		 1846 cflag = termio->c_cflag; /* termio->c_cflag */
1847
1848 mode = termio->c_cflag & CSIZE;
1849 if (mode == CS5)
1850 mode = MX_CS5;
1851 else if (mode == CS6)
1852 mode = MX_CS6;
1853 else if (mode == CS7)
1854 mode = MX_CS7;
1855 else if (mode == CS8)
1856 mode = MX_CS8;
1857
1858 if (termio->c_cflag & CSTOPB) {
1859 if (mode == MX_CS5)
1860 mode |= MX_STOP15;
1861 else
1862 mode |= MX_STOP2;
1863 } else
1864 mode |= MX_STOP1;
1865
1866 if (termio->c_cflag & PARENB) {
1867 if (termio->c_cflag & PARODD)
1868 mode |= MX_PARODD;
1869 else
1870 mode |= MX_PAREVEN;
1871 } else
1872 mode |= MX_PARNONE;
1873
eaa95a8d 1874 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
1da177e4 1875
08d01c79
JS		 1876 if (MOXA_IS_320(port->board) && baud >= 921600)
1877 return -1;
1878
db1acaa6 1879 baud = MoxaPortSetBaud(port, baud);
1da177e4
LT		 1880
1881 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
1882 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
1883 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
1884 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
6f56b658 1885 moxa_wait_finish(ofsAddr);
1da177e4
LT		 1886
1887 }
eaa95a8d 1888 return baud;
1da177e4
LT		 1889}
1890
b4173f45
JS		 1891static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
1892 int *rtsState)
1da177e4 1893{
b4173f45
JS		 1894 if (dtrState)
1895 *dtrState = !!(port->lineCtrl & DTR_ON);
1896 if (rtsState)
1897 *rtsState = !!(port->lineCtrl & RTS_ON);
1898
eaa95a8d 1899 return 0;
1da177e4
LT		 1900}
1901
b4173f45 1902static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
1da177e4 1903{
eaa95a8d 1904 u8 mode = 0;
1da177e4 1905
1da177e4
LT		 1906 if (dtr)
1907 mode |= DTR_ON;
1908 if (rts)
1909 mode |= RTS_ON;
b4173f45
JS		 1910 port->lineCtrl = mode;
1911 moxafunc(port->tableAddr, FC_LineControl, mode);
1da177e4
LT		 1912}
1913
b4173f45
JS		 1914static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
1915 int txflow, int rxflow, int txany)
1da177e4 1916{
b4173f45 1917 int mode = 0;
1da177e4 1918
1da177e4
LT		 1919 if (rts)
1920 mode |= RTS_FlowCtl;
1921 if (cts)
1922 mode |= CTS_FlowCtl;
1923 if (txflow)
1924 mode |= Tx_FlowCtl;
1925 if (rxflow)
1926 mode |= Rx_FlowCtl;
1927 if (txany)
1928 mode |= IXM_IXANY;
b4173f45 1929 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
1da177e4
LT		 1930}
1931
b4173f45 1932static int MoxaPortLineStatus(struct moxa_port *port)
1da177e4
LT		 1933{
1934 void __iomem *ofsAddr;
1935 int val;
1936
b4173f45 1937 ofsAddr = port->tableAddr;
08d01c79 1938 if (MOXA_IS_320(port->board)) {
1da177e4
LT		 1939 moxafunc(ofsAddr, FC_LineStatus, 0);
1940 val = readw(ofsAddr + FuncArg);
1941 } else {
1942 val = readw(ofsAddr + FlagStat) >> 4;
1943 }
1944 val &= 0x0B;
7bcf97d1 1945 if (val & 8)
1da177e4 1946 val |= 4;
a8f5cda0 1947 spin_lock_bh(&moxa_lock);
7bcf97d1 1948 moxa_new_dcdstate(port, val & 8);
a8f5cda0 1949 spin_unlock_bh(&moxa_lock);
1da177e4 1950 val &= 7;
7bcf97d1 1951 return val;
1da177e4
LT		 1952}
1953
2108eba5
JS		 1954static int MoxaPortWriteData(struct moxa_port *port,
1955 const unsigned char *buffer, int len)
1da177e4 1956{
1da177e4 1957 void __iomem *baseAddr, *ofsAddr, *ofs;
2108eba5
JS		 1958 unsigned int c, total;
1959 u16 head, tail, tx_mask, spage, epage;
1960 u16 pageno, pageofs, bufhead;
1da177e4 1961
b4173f45
JS		 1962 ofsAddr = port->tableAddr;
1963 baseAddr = port->board->basemem;
1da177e4
LT		 1964 tx_mask = readw(ofsAddr + TX_mask);
1965 spage = readw(ofsAddr + Page_txb);
1966 epage = readw(ofsAddr + EndPage_txb);
1967 tail = readw(ofsAddr + TXwptr);
1968 head = readw(ofsAddr + TXrptr);
2108eba5 1969 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
1da177e4
LT		 1970 if (c > len)
1971 c = len;
b4173f45 1972 moxaLog.txcnt[port->tty->index] += c;
1da177e4
LT		 1973 total = c;
1974 if (spage == epage) {
1975 bufhead = readw(ofsAddr + Ofs_txb);
1976 writew(spage, baseAddr + Control_reg);
1977 while (c > 0) {
1978 if (head > tail)
1979 len = head - tail - 1;
1980 else
1981 len = tx_mask + 1 - tail;
1982 len = (c > len) ? len : c;
1983 ofs = baseAddr + DynPage_addr + bufhead + tail;
2108eba5
JS		 1984 memcpy_toio(ofs, buffer, len);
1985 buffer += len;
1da177e4
LT		 1986 tail = (tail + len) & tx_mask;
1987 c -= len;
1988 }
1da177e4 1989 } else {
1da177e4
LT		 1990 pageno = spage + (tail >> 13);
1991 pageofs = tail & Page_mask;
2108eba5
JS		 1992 while (c > 0) {
1993 len = Page_size - pageofs;
1994 if (len > c)
1995 len = c;
1da177e4
LT		 1996 writeb(pageno, baseAddr + Control_reg);
1997 ofs = baseAddr + DynPage_addr + pageofs;
2108eba5
JS		 1998 memcpy_toio(ofs, buffer, len);
1999 buffer += len;
1da177e4
LT		 2000 if (++pageno == epage)
2001 pageno = spage;
2002 pageofs = 0;
2108eba5
JS		 2003 c -= len;
2004 }
2005 tail = (tail + total) & tx_mask;
1da177e4 2006 }
2108eba5 2007 writew(tail, ofsAddr + TXwptr);
1da177e4 2008 writeb(1, ofsAddr + CD180TXirq); /* start to send */
2108eba5 2009 return total;
1da177e4
LT		 2010}
2011
7bcf97d1 2012static int MoxaPortReadData(struct moxa_port *port)
1da177e4 2013{
7bcf97d1 2014 struct tty_struct *tty = port->tty;
2108eba5 2015 unsigned char *dst;
1da177e4 2016 void __iomem *baseAddr, *ofsAddr, *ofs;
2108eba5
JS		 2017 unsigned int count, len, total;
2018 u16 tail, rx_mask, spage, epage;
2019 u16 pageno, pageofs, bufhead, head;
1da177e4 2020
b4173f45
JS		 2021 ofsAddr = port->tableAddr;
2022 baseAddr = port->board->basemem;
1da177e4
LT		 2023 head = readw(ofsAddr + RXrptr);
2024 tail = readw(ofsAddr + RXwptr);
2025 rx_mask = readw(ofsAddr + RX_mask);
2026 spage = readw(ofsAddr + Page_rxb);
2027 epage = readw(ofsAddr + EndPage_rxb);
2108eba5 2028 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
1da177e4 2029 if (count == 0)
33f0f88f 2030 return 0;
1da177e4 2031
33f0f88f 2032 total = count;
7bcf97d1 2033 moxaLog.rxcnt[tty->index] += total;
1da177e4
LT		 2034 if (spage == epage) {
2035 bufhead = readw(ofsAddr + Ofs_rxb);
2036 writew(spage, baseAddr + Control_reg);
2037 while (count > 0) {
1da177e4 2038 ofs = baseAddr + DynPage_addr + bufhead + head;
2108eba5
JS		 2039 len = (tail >= head) ? (tail - head) :
2040 (rx_mask + 1 - head);
2041 len = tty_prepare_flip_string(tty, &dst,
2042 min(len, count));
2043 memcpy_fromio(dst, ofs, len);
1da177e4
LT		 2044 head = (head + len) & rx_mask;
2045 count -= len;
2046 }
1da177e4 2047 } else {
1da177e4
LT		 2048 pageno = spage + (head >> 13);
2049 pageofs = head & Page_mask;
2108eba5 2050 while (count > 0) {
1da177e4
LT		 2051 writew(pageno, baseAddr + Control_reg);
2052 ofs = baseAddr + DynPage_addr + pageofs;
2108eba5
JS		 2053 len = tty_prepare_flip_string(tty, &dst,
2054 min(Page_size - pageofs, count));
2055 memcpy_fromio(dst, ofs, len);
2056
2057 count -= len;
2058 pageofs = (pageofs + len) & Page_mask;
2059 if (pageofs == 0 && ++pageno == epage)
1da177e4 2060 pageno = spage;
2108eba5
JS		 2061 }
2062 head = (head + total) & rx_mask;
1da177e4 2063 }
2108eba5
JS		 2064 writew(head, ofsAddr + RXrptr);
2065 if (readb(ofsAddr + FlagStat) & Xoff_state) {
1da177e4 2066 moxaLowWaterChk = 1;
b4173f45 2067 port->lowChkFlag = 1;
1da177e4 2068 }
2108eba5 2069 return total;
1da177e4
LT		 2070}
2071
2072
b4173f45 2073static int MoxaPortTxQueue(struct moxa_port *port)
1da177e4 2074{
b4173f45 2075 void __iomem *ofsAddr = port->tableAddr;
2108eba5 2076 u16 rptr, wptr, mask;
1da177e4 2077
1da177e4
LT		 2078 rptr = readw(ofsAddr + TXrptr);
2079 wptr = readw(ofsAddr + TXwptr);
2080 mask = readw(ofsAddr + TX_mask);
2108eba5 2081 return (wptr - rptr) & mask;
1da177e4
LT		 2082}
2083
b4173f45 2084static int MoxaPortTxFree(struct moxa_port *port)
1da177e4 2085{
b4173f45 2086 void __iomem *ofsAddr = port->tableAddr;
2108eba5 2087 u16 rptr, wptr, mask;
1da177e4 2088
1da177e4
LT		 2089 rptr = readw(ofsAddr + TXrptr);
2090 wptr = readw(ofsAddr + TXwptr);
2091 mask = readw(ofsAddr + TX_mask);
2108eba5 2092 return mask - ((wptr - rptr) & mask);
1da177e4
LT		 2093}
2094
b4173f45 2095static int MoxaPortRxQueue(struct moxa_port *port)
1da177e4 2096{
b4173f45 2097 void __iomem *ofsAddr = port->tableAddr;
2108eba5 2098 u16 rptr, wptr, mask;
1da177e4 2099
1da177e4
LT		 2100 rptr = readw(ofsAddr + RXrptr);
2101 wptr = readw(ofsAddr + RXwptr);
2102 mask = readw(ofsAddr + RX_mask);
2108eba5 2103 return (wptr - rptr) & mask;
1da177e4
LT		 2104}
2105
b4173f45 2106static void MoxaPortTxDisable(struct moxa_port *port)
1da177e4 2107{
b4173f45 2108 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
1da177e4
LT		 2109}
2110
b4173f45 2111static void MoxaPortTxEnable(struct moxa_port *port)
1da177e4 2112{
b4173f45 2113 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
1da177e4
LT		 2114}
2115
8f8ecbad 2116static int moxa_get_serial_info(struct moxa_port *info,
eaa95a8d 2117 struct serial_struct __user *retinfo)
1da177e4 2118{
eaa95a8d
JS		 2119 struct serial_struct tmp = {
2120 .type = info->type,
2121 .line = info->tty->index,
2122 .flags = info->asyncflags,
2123 .baud_base = 921600,
2124 .close_delay = info->close_delay
2125 };
2126 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
1da177e4
LT		 2127}
2128
2129
8f8ecbad 2130static int moxa_set_serial_info(struct moxa_port *info,
eaa95a8d 2131 struct serial_struct __user *new_info)
1da177e4
LT		 2132{
2133 struct serial_struct new_serial;
2134
eaa95a8d 2135 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1da177e4
LT		 2136 return -EFAULT;
2137
eaa95a8d
JS		 2138 if (new_serial.irq != 0 || new_serial.port != 0 ||
2139 new_serial.custom_divisor != 0 ||
2140 new_serial.baud_base != 921600)
2141 return -EPERM;
1da177e4
LT		 2142
2143 if (!capable(CAP_SYS_ADMIN)) {
2144 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
2145 (info->asyncflags & ~ASYNC_USR_MASK)))
eaa95a8d
JS		 2146 return -EPERM;
2147 } else
1da177e4 2148 info->close_delay = new_serial.close_delay * HZ / 100;
1da177e4
LT		 2149
2150 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
2151 new_serial.flags |= (info->asyncflags & ASYNC_FLAGS);
2152
eaa95a8d 2153 MoxaSetFifo(info, new_serial.type == PORT_16550A);
1da177e4
LT		 2154
2155 info->type = new_serial.type;
eaa95a8d 2156 return 0;
1da177e4
LT		 2157}
2158
2159
2160
2161/*****************************************************************************
2162 * Static local functions: *
2163 *****************************************************************************/
1da177e4 2164
b4173f45 2165static void MoxaSetFifo(struct moxa_port *port, int enable)
1da177e4 2166{
b4173f45 2167 void __iomem *ofsAddr = port->tableAddr;
1da177e4
LT		 2168
2169 if (!enable) {
2170 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2171 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2172 } else {
2173 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2174 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
2175 }
2176}
Linux 6.x block layer and io_uring tree(s)