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Char: moxa, introduce MOXA_IS_320 macro
[mirror_ubuntu-focal-kernel.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
eaa95a8d 964 return 0;
03718234
JS		 965err_base:
966 iounmap(board->basemem);
967 board->basemem = NULL;
e46a5e3f
JS		 968err_reg:
969 pci_release_region(pdev, 2);
9cde5bf0
JS		 970err:
971 return retval;
972}
973
974static void __devexit moxa_pci_remove(struct pci_dev *pdev)
975{
976 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
977
810ab09b
JS		 978 moxa_board_deinit(brd);
979
e46a5e3f 980 pci_release_region(pdev, 2);
1da177e4 981}
a784bf7c
JS		 982
983static struct pci_driver moxa_pci_driver = {
984 .name = "moxa",
985 .id_table = moxa_pcibrds,
986 .probe = moxa_pci_probe,
987 .remove = __devexit_p(moxa_pci_remove)
988};
1da177e4
LT		 989#endif /* CONFIG_PCI */
990
991static int __init moxa_init(void)
992{
810ab09b 993 unsigned int isabrds = 0;
d353eca4 994 int retval = 0;
1da177e4 995
7aeb95da
JS		 996 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
997 MOXA_VERSION);
1da177e4
LT		 998 moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
999 if (!moxaDriver)
1000 return -ENOMEM;
1001
1da177e4 1002 moxaDriver->owner = THIS_MODULE;
9b4e3b13 1003 moxaDriver->name = "ttyMX";
1da177e4
LT		 1004 moxaDriver->major = ttymajor;
1005 moxaDriver->minor_start = 0;
1006 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
1007 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
1008 moxaDriver->init_termios = tty_std_termios;
1da177e4 1009 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
606d099c
AC		 1010 moxaDriver->init_termios.c_ispeed = 9600;
1011 moxaDriver->init_termios.c_ospeed = 9600;
1da177e4
LT		 1012 moxaDriver->flags = TTY_DRIVER_REAL_RAW;
1013 tty_set_operations(moxaDriver, &moxa_ops);
1014
1da177e4 1015 if (tty_register_driver(moxaDriver)) {
eaa95a8d 1016 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
1da177e4
LT		 1017 put_tty_driver(moxaDriver);
1018 return -1;
1019 }
1da177e4 1020
d353eca4 1021 /* Find the boards defined from module args. */
1da177e4 1022#ifdef MODULE
d353eca4
JS		 1023 {
1024 struct moxa_board_conf *brd = moxa_boards;
810ab09b 1025 unsigned int i;
1da177e4 1026 for (i = 0; i < MAX_BOARDS; i++) {
d353eca4
JS		 1027 if (!baseaddr[i])
1028 break;
1029 if (type[i] == MOXA_BOARD_C218_ISA ||
1030 type[i] == MOXA_BOARD_C320_ISA) {
7aeb95da 1031 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
d353eca4
JS		 1032 isabrds + 1, moxa_brdname[type[i] - 1],
1033 baseaddr[i]);
1034 brd->boardType = type[i];
1035 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
1036 numports[i];
1037 brd->busType = MOXA_BUS_TYPE_ISA;
1038 brd->basemem = ioremap(baseaddr[i], 0x4000);
1039 if (!brd->basemem) {
eaa95a8d 1040 printk(KERN_ERR "MOXA: can't remap %lx\n",
d353eca4 1041 baseaddr[i]);
1da177e4
LT		 1042 continue;
1043 }
03718234
JS		 1044 if (moxa_init_board(brd, NULL)) {
1045 iounmap(brd->basemem);
1046 brd->basemem = NULL;
1047 continue;
1048 }
d353eca4
JS		 1049
1050 brd++;
1051 isabrds++;
1da177e4
LT		 1052 }
1053 }
d353eca4 1054 }
1da177e4 1055#endif
a784bf7c 1056
1da177e4 1057#ifdef CONFIG_PCI
a784bf7c
JS		 1058 retval = pci_register_driver(&moxa_pci_driver);
1059 if (retval) {
eaa95a8d 1060 printk(KERN_ERR "Can't register MOXA pci driver!\n");
d353eca4 1061 if (isabrds)
a784bf7c 1062 retval = 0;
1da177e4
LT		 1063 }
1064#endif
a784bf7c 1065
a784bf7c 1066 return retval;
1da177e4
LT		 1067}
1068
1069static void __exit moxa_exit(void)
1070{
eaa95a8d 1071 unsigned int i;
1da177e4 1072
9cde5bf0 1073#ifdef CONFIG_PCI
a784bf7c 1074 pci_unregister_driver(&moxa_pci_driver);
9cde5bf0 1075#endif
a784bf7c 1076
810ab09b
JS		 1077 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
1078 if (moxa_boards[i].ready)
1079 moxa_board_deinit(&moxa_boards[i]);
2a541341
JS		 1080
1081 del_timer_sync(&moxaTimer);
1082
1083 if (tty_unregister_driver(moxaDriver))
1084 printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
1085 "serial driver\n");
1086 put_tty_driver(moxaDriver);
1da177e4
LT		 1087}
1088
1089module_init(moxa_init);
1090module_exit(moxa_exit);
1091
a8f5cda0
JS		 1092static void moxa_close_port(struct moxa_port *ch)
1093{
1094 moxa_shut_down(ch);
1095 MoxaPortFlushData(ch, 2);
1096 ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE;
1097 ch->tty->driver_data = NULL;
1098 ch->tty = NULL;
1099}
1100
1101static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,
1102 struct moxa_port *ch)
1103{
1104 DEFINE_WAIT(wait);
1105 int retval = 0;
1106 u8 dcd;
1107
1108 while (1) {
1109 prepare_to_wait(&ch->open_wait, &wait, TASK_INTERRUPTIBLE);
1110 if (tty_hung_up_p(filp)) {
1111#ifdef SERIAL_DO_RESTART
1112 retval = -ERESTARTSYS;
1113#else
1114 retval = -EAGAIN;
1115#endif
1116 break;
1117 }
1118 spin_lock_bh(&moxa_lock);
1119 dcd = ch->DCDState;
1120 spin_unlock_bh(&moxa_lock);
1121 if (dcd)
1122 break;
1123
1124 if (signal_pending(current)) {
1125 retval = -ERESTARTSYS;
1126 break;
1127 }
1128 schedule();
1129 }
1130 finish_wait(&ch->open_wait, &wait);
1131
1132 return retval;
1133}
1134
1da177e4
LT		 1135static int moxa_open(struct tty_struct *tty, struct file *filp)
1136{
810ab09b 1137 struct moxa_board_conf *brd;
8f8ecbad 1138 struct moxa_port *ch;
1da177e4
LT		 1139 int port;
1140 int retval;
1da177e4 1141
11324edd 1142 port = tty->index;
1da177e4 1143 if (port == MAX_PORTS) {
74d7d97b 1144 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
1da177e4 1145 }
a8f5cda0
JS		 1146 if (mutex_lock_interruptible(&moxa_openlock))
1147 return -ERESTARTSYS;
810ab09b 1148 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
a8f5cda0
JS		 1149 if (!brd->ready) {
1150 mutex_unlock(&moxa_openlock);
810ab09b 1151 return -ENODEV;
a8f5cda0 1152 }
1da177e4 1153
810ab09b 1154 ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
1da177e4
LT		 1155 ch->count++;
1156 tty->driver_data = ch;
1157 ch->tty = tty;
1158 if (!(ch->asyncflags & ASYNC_INITIALIZED)) {
1159 ch->statusflags = 0;
db1acaa6 1160 moxa_set_tty_param(tty, tty->termios);
b4173f45
JS		 1161 MoxaPortLineCtrl(ch, 1, 1);
1162 MoxaPortEnable(ch);
a8f5cda0 1163 MoxaSetFifo(ch, ch->type == PORT_16550A);
1da177e4
LT		 1164 ch->asyncflags |= ASYNC_INITIALIZED;
1165 }
a8f5cda0 1166 mutex_unlock(&moxa_openlock);
1da177e4 1167
a8f5cda0
JS		 1168 retval = 0;
1169 if (!(filp->f_flags & O_NONBLOCK) && !C_CLOCAL(tty))
1170 retval = moxa_block_till_ready(tty, filp, ch);
1171 mutex_lock(&moxa_openlock);
1172 if (retval) {
1173 if (ch->count) /* 0 means already hung up... */
1174 if (--ch->count == 0)
1175 moxa_close_port(ch);
1176 } else
1177 ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
1178 mutex_unlock(&moxa_openlock);
1da177e4 1179
a8f5cda0 1180 return retval;
1da177e4
LT		 1181}
1182
1183static void moxa_close(struct tty_struct *tty, struct file *filp)
1184{
8f8ecbad 1185 struct moxa_port *ch;
1da177e4
LT		 1186 int port;
1187
11324edd 1188 port = tty->index;
a8f5cda0 1189 if (port == MAX_PORTS || tty_hung_up_p(filp))
1da177e4 1190 return;
1da177e4 1191
a8f5cda0
JS		 1192 mutex_lock(&moxa_openlock);
1193 ch = tty->driver_data;
1194 if (ch == NULL)
1195 goto unlock;
1196 if (tty->count == 1 && ch->count != 1) {
7aeb95da
JS		 1197 printk(KERN_WARNING "moxa_close: bad serial port count; "
1198 "tty->count is 1, ch->count is %d\n", ch->count);
1da177e4
LT		 1199 ch->count = 1;
1200 }
1201 if (--ch->count < 0) {
7aeb95da
JS		 1202 printk(KERN_WARNING "moxa_close: bad serial port count, "
1203 "device=%s\n", tty->name);
1da177e4
LT		 1204 ch->count = 0;
1205 }
a8f5cda0
JS		 1206 if (ch->count)
1207 goto unlock;
1da177e4
LT		 1208
1209 ch->cflag = tty->termios->c_cflag;
1210 if (ch->asyncflags & ASYNC_INITIALIZED) {
6f56b658 1211 moxa_setup_empty_event(tty);
1da177e4 1212 tty_wait_until_sent(tty, 30 * HZ); /* 30 seconds timeout */
1da177e4 1213 }
1da177e4 1214
a8f5cda0
JS		 1215 moxa_close_port(ch);
1216unlock:
1217 mutex_unlock(&moxa_openlock);
1da177e4
LT		 1218}
1219
1220static int moxa_write(struct tty_struct *tty,
1221 const unsigned char *buf, int count)
1222{
b4173f45 1223 struct moxa_port *ch = tty->driver_data;
b4173f45 1224 int len;
1da177e4 1225
1da177e4 1226 if (ch == NULL)
b4173f45 1227 return 0;
33f0f88f 1228
7bcf97d1 1229 spin_lock_bh(&moxa_lock);
2108eba5 1230 len = MoxaPortWriteData(ch, buf, count);
7bcf97d1 1231 spin_unlock_bh(&moxa_lock);
1da177e4 1232
1da177e4 1233 ch->statusflags |= LOWWAIT;
eaa95a8d 1234 return len;
1da177e4
LT		 1235}
1236
1237static int moxa_write_room(struct tty_struct *tty)
1238{
8f8ecbad 1239 struct moxa_port *ch;
1da177e4
LT		 1240
1241 if (tty->stopped)
eaa95a8d 1242 return 0;
b4173f45 1243 ch = tty->driver_data;
1da177e4 1244 if (ch == NULL)
eaa95a8d 1245 return 0;
b4173f45 1246 return MoxaPortTxFree(ch);
1da177e4
LT		 1247}
1248
1249static void moxa_flush_buffer(struct tty_struct *tty)
1250{
b4173f45 1251 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1252
1253 if (ch == NULL)
1254 return;
b4173f45 1255 MoxaPortFlushData(ch, 1);
1da177e4
LT		 1256 tty_wakeup(tty);
1257}
1258
1259static int moxa_chars_in_buffer(struct tty_struct *tty)
1260{
b4173f45 1261 struct moxa_port *ch = tty->driver_data;
1da177e4 1262 int chars;
1da177e4
LT		 1263
1264 /*
1265 * Sigh...I have to check if driver_data is NULL here, because
1266 * if an open() fails, the TTY subsystem eventually calls
1267 * tty_wait_until_sent(), which calls the driver's chars_in_buffer()
1268 * routine. And since the open() failed, we return 0 here. TDJ
1269 */
1270 if (ch == NULL)
eaa95a8d 1271 return 0;
b4173f45 1272 chars = MoxaPortTxQueue(ch);
1da177e4
LT		 1273 if (chars) {
1274 /*
1275 * Make it possible to wakeup anything waiting for output
1276 * in tty_ioctl.c, etc.
1277 */
1278 if (!(ch->statusflags & EMPTYWAIT))
6f56b658 1279 moxa_setup_empty_event(tty);
1da177e4 1280 }
eaa95a8d 1281 return chars;
1da177e4
LT		 1282}
1283
1da177e4
LT		 1284static int moxa_tiocmget(struct tty_struct *tty, struct file *file)
1285{
a8f5cda0 1286 struct moxa_port *ch;
1da177e4
LT		 1287 int flag = 0, dtr, rts;
1288
a8f5cda0
JS		 1289 mutex_lock(&moxa_openlock);
1290 ch = tty->driver_data;
1291 if (!ch) {
1292 mutex_unlock(&moxa_openlock);
74d7d97b 1293 return -EINVAL;
a8f5cda0 1294 }
1da177e4 1295
b4173f45 1296 MoxaPortGetLineOut(ch, &dtr, &rts);
1da177e4
LT		 1297 if (dtr)
1298 flag |= TIOCM_DTR;
1299 if (rts)
1300 flag |= TIOCM_RTS;
b4173f45 1301 dtr = MoxaPortLineStatus(ch);
1da177e4
LT		 1302 if (dtr & 1)
1303 flag |= TIOCM_CTS;
1304 if (dtr & 2)
1305 flag |= TIOCM_DSR;
1306 if (dtr & 4)
1307 flag |= TIOCM_CD;
a8f5cda0 1308 mutex_unlock(&moxa_openlock);
1da177e4
LT		 1309 return flag;
1310}
1311
1312static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
1313 unsigned int set, unsigned int clear)
1314{
a8f5cda0 1315 struct moxa_port *ch;
1da177e4
LT		 1316 int port;
1317 int dtr, rts;
1318
11324edd 1319 port = tty->index;
a8f5cda0
JS		 1320 mutex_lock(&moxa_openlock);
1321 ch = tty->driver_data;
1322 if (!ch) {
1323 mutex_unlock(&moxa_openlock);
74d7d97b 1324 return -EINVAL;
a8f5cda0 1325 }
1da177e4 1326
b4173f45 1327 MoxaPortGetLineOut(ch, &dtr, &rts);
1da177e4
LT		 1328 if (set & TIOCM_RTS)
1329 rts = 1;
1330 if (set & TIOCM_DTR)
1331 dtr = 1;
1332 if (clear & TIOCM_RTS)
1333 rts = 0;
1334 if (clear & TIOCM_DTR)
1335 dtr = 0;
b4173f45 1336 MoxaPortLineCtrl(ch, dtr, rts);
a8f5cda0 1337 mutex_unlock(&moxa_openlock);
1da177e4
LT		 1338 return 0;
1339}
1340
1da177e4
LT		 1341static void moxa_throttle(struct tty_struct *tty)
1342{
eaa95a8d 1343 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1344
1345 ch->statusflags |= THROTTLE;
1346}
1347
1348static void moxa_unthrottle(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_set_termios(struct tty_struct *tty,
eaa95a8d 1356 struct ktermios *old_termios)
1da177e4 1357{
eaa95a8d 1358 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1359
1360 if (ch == NULL)
1361 return;
db1acaa6 1362 moxa_set_tty_param(tty, old_termios);
eaa95a8d 1363 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
1da177e4
LT		 1364 wake_up_interruptible(&ch->open_wait);
1365}
1366
1367static void moxa_stop(struct tty_struct *tty)
1368{
eaa95a8d 1369 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1370
1371 if (ch == NULL)
1372 return;
b4173f45 1373 MoxaPortTxDisable(ch);
1da177e4
LT		 1374 ch->statusflags |= TXSTOPPED;
1375}
1376
1377
1378static void moxa_start(struct tty_struct *tty)
1379{
eaa95a8d 1380 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1381
1382 if (ch == NULL)
1383 return;
1384
1385 if (!(ch->statusflags & TXSTOPPED))
1386 return;
1387
b4173f45 1388 MoxaPortTxEnable(ch);
1da177e4
LT		 1389 ch->statusflags &= ~TXSTOPPED;
1390}
1391
1392static void moxa_hangup(struct tty_struct *tty)
1393{
a8f5cda0 1394 struct moxa_port *ch;
1da177e4 1395
a8f5cda0
JS		 1396 mutex_lock(&moxa_openlock);
1397 ch = tty->driver_data;
1398 if (ch == NULL) {
1399 mutex_unlock(&moxa_openlock);
1400 return;
1401 }
1da177e4 1402 ch->count = 0;
a8f5cda0
JS		 1403 moxa_close_port(ch);
1404 mutex_unlock(&moxa_openlock);
1405
1da177e4
LT		 1406 wake_up_interruptible(&ch->open_wait);
1407}
1408
7bcf97d1 1409static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
1da177e4 1410{
7bcf97d1 1411 dcd = !!dcd;
1da177e4 1412
eaa95a8d 1413 if (dcd != p->DCDState && p->tty && C_CLOCAL(p->tty)) {
a8f5cda0 1414 if (!dcd)
7bcf97d1 1415 tty_hangup(p->tty);
7bcf97d1
JS		 1416 }
1417 p->DCDState = dcd;
1418}
1da177e4 1419
7bcf97d1
JS		 1420static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
1421 u16 __iomem *ip)
1422{
1423 struct tty_struct *tty = p->tty;
1424 void __iomem *ofsAddr;
1425 unsigned int inited = p->asyncflags & ASYNC_INITIALIZED;
1426 u16 intr;
1427
1428 if (tty) {
1429 if ((p->statusflags & EMPTYWAIT) &&
1430 MoxaPortTxQueue(p) == 0) {
1431 p->statusflags &= ~EMPTYWAIT;
1432 tty_wakeup(tty);
1433 }
1434 if ((p->statusflags & LOWWAIT) && !tty->stopped &&
1435 MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
1436 p->statusflags &= ~LOWWAIT;
1437 tty_wakeup(tty);
1438 }
1439
1440 if (inited && !(p->statusflags & THROTTLE) &&
1441 MoxaPortRxQueue(p) > 0) { /* RX */
1442 MoxaPortReadData(p);
1443 tty_schedule_flip(tty);
1444 }
1445 } else {
1446 p->statusflags &= ~EMPTYWAIT;
1447 MoxaPortFlushData(p, 0); /* flush RX */
1da177e4 1448 }
0bcc4caa 1449
7bcf97d1
JS		 1450 if (!handle) /* nothing else to do */
1451 return 0;
1452
1453 intr = readw(ip); /* port irq status */
1454 if (intr == 0)
1455 return 0;
1456
1457 writew(0, ip); /* ACK port */
1458 ofsAddr = p->tableAddr;
1459 if (intr & IntrTx) /* disable tx intr */
1460 writew(readw(ofsAddr + HostStat) & ~WakeupTx,
1461 ofsAddr + HostStat);
1462
1463 if (!inited)
1464 return 0;
1465
1466 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
1467 tty_insert_flip_char(tty, 0, TTY_BREAK);
1468 tty_schedule_flip(tty);
1469 }
1470
1471 if (intr & IntrLine)
1472 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
1473
1474 return 0;
1475}
1476
1477static void moxa_poll(unsigned long ignored)
1478{
1479 struct moxa_board_conf *brd;
1480 u16 __iomem *ip;
2a541341 1481 unsigned int card, port, served = 0;
7bcf97d1
JS		 1482
1483 spin_lock(&moxa_lock);
1da177e4 1484 for (card = 0; card < MAX_BOARDS; card++) {
7bcf97d1
JS		 1485 brd = &moxa_boards[card];
1486 if (!brd->ready)
1da177e4 1487 continue;
7bcf97d1 1488
2a541341
JS		 1489 served++;
1490
7bcf97d1
JS		 1491 ip = NULL;
1492 if (readb(brd->intPend) == 0xff)
1493 ip = brd->intTable + readb(brd->intNdx);
1494
1495 for (port = 0; port < brd->numPorts; port++)
1496 moxa_poll_port(&brd->ports[port], !!ip, ip + port);
1497
1498 if (ip)
1499 writeb(0, brd->intPend); /* ACK */
1500
1501 if (moxaLowWaterChk) {
1502 struct moxa_port *p = brd->ports;
1503 for (port = 0; port < brd->numPorts; port++, p++)
1504 if (p->lowChkFlag) {
1505 p->lowChkFlag = 0;
1506 moxa_low_water_check(p->tableAddr);
1da177e4 1507 }
1da177e4
LT		 1508 }
1509 }
7bcf97d1 1510 moxaLowWaterChk = 0;
1da177e4 1511
2a541341
JS		 1512 if (served)
1513 mod_timer(&moxaTimer, jiffies + HZ / 50);
1514 spin_unlock(&moxa_lock);
1da177e4
LT		 1515}
1516
1517/******************************************************************************/
1518
db1acaa6 1519static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4 1520{
eaa95a8d
JS		 1521 register struct ktermios *ts = tty->termios;
1522 struct moxa_port *ch = tty->driver_data;
db1acaa6 1523 int rts, cts, txflow, rxflow, xany, baud;
1da177e4 1524
1da177e4
LT		 1525 rts = cts = txflow = rxflow = xany = 0;
1526 if (ts->c_cflag & CRTSCTS)
1527 rts = cts = 1;
1528 if (ts->c_iflag & IXON)
1529 txflow = 1;
1530 if (ts->c_iflag & IXOFF)
1531 rxflow = 1;
1532 if (ts->c_iflag & IXANY)
1533 xany = 1;
db1acaa6
AC		 1534
1535 /* Clear the features we don't support */
1536 ts->c_cflag &= ~CMSPAR;
b4173f45
JS		 1537 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1538 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
db1acaa6
AC		 1539 if (baud == -1)
1540 baud = tty_termios_baud_rate(old_termios);
1541 /* Not put the baud rate into the termios data */
1542 tty_encode_baud_rate(tty, baud, baud);
1da177e4
LT		 1543}
1544
6f56b658 1545static void moxa_setup_empty_event(struct tty_struct *tty)
1da177e4 1546{
8f8ecbad 1547 struct moxa_port *ch = tty->driver_data;
1da177e4 1548
7bcf97d1 1549 spin_lock_bh(&moxa_lock);
1da177e4 1550 ch->statusflags |= EMPTYWAIT;
7bcf97d1 1551 spin_unlock_bh(&moxa_lock);
1da177e4
LT		 1552}
1553
6f56b658 1554static void moxa_shut_down(struct moxa_port *ch)
1da177e4 1555{
a8f5cda0 1556 struct tty_struct *tp = ch->tty;
1da177e4
LT		 1557
1558 if (!(ch->asyncflags & ASYNC_INITIALIZED))
1559 return;
1560
b4173f45 1561 MoxaPortDisable(ch);
1da177e4
LT		 1562
1563 /*
1564 * If we're a modem control device and HUPCL is on, drop RTS & DTR.
1565 */
a8f5cda0 1566 if (C_HUPCL(tp))
b4173f45 1567 MoxaPortLineCtrl(ch, 0, 0);
1da177e4 1568
a8f5cda0 1569 spin_lock_bh(&moxa_lock);
1da177e4 1570 ch->asyncflags &= ~ASYNC_INITIALIZED;
a8f5cda0 1571 spin_unlock_bh(&moxa_lock);
1da177e4
LT		 1572}
1573
1da177e4
LT		 1574/*****************************************************************************
1575 * Driver level functions: *
1da177e4 1576 *****************************************************************************/
1da177e4 1577
b4173f45 1578static void MoxaPortFlushData(struct moxa_port *port, int mode)
1da177e4
LT		 1579{
1580 void __iomem *ofsAddr;
eaa95a8d 1581 if (mode < 0 || mode > 2)
1da177e4 1582 return;
b4173f45 1583 ofsAddr = port->tableAddr;
1da177e4
LT		 1584 moxafunc(ofsAddr, FC_FlushQueue, mode);
1585 if (mode != 1) {
b4173f45 1586 port->lowChkFlag = 0;
6f56b658 1587 moxa_low_water_check(ofsAddr);
1da177e4
LT		 1588 }
1589}
1590
1da177e4
LT		 1591/*
1592 * Moxa Port Number Description:
1593 *
1594 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1595 * the port number using in MOXA driver functions will be 0 to 31 for
1596 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1597 * to 127 for fourth. For example, if you setup three MOXA boards,
1598 * first board is C218, second board is C320-16 and third board is
1599 * C320-32. The port number of first board (C218 - 8 ports) is from
1600 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1601 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1602 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1603 * 127 will be invalid.
1604 *
1605 *
1606 * Moxa Functions Description:
1607 *
1608 * Function 1: Driver initialization routine, this routine must be
1609 * called when initialized driver.
1610 * Syntax:
1611 * void MoxaDriverInit();
1612 *
1613 *
1614 * Function 2: Moxa driver private IOCTL command processing.
1615 * Syntax:
1616 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1617 *
1618 * unsigned int cmd : IOCTL command
1619 * unsigned long arg : IOCTL argument
1620 * int port : port number (0 - 127)
1621 *
1622 * return: 0 (OK)
1623 * -EINVAL
1624 * -ENOIOCTLCMD
1625 *
1626 *
1da177e4
LT		 1627 * Function 6: Enable this port to start Tx/Rx data.
1628 * Syntax:
1629 * void MoxaPortEnable(int port);
1630 * int port : port number (0 - 127)
1631 *
1632 *
1633 * Function 7: Disable this port
1634 * Syntax:
1635 * void MoxaPortDisable(int port);
1636 * int port : port number (0 - 127)
1637 *
1638 *
1da177e4
LT		 1639 * Function 10: Setting baud rate of this port.
1640 * Syntax:
08d01c79 1641 * speed_t MoxaPortSetBaud(int port, speed_t baud);
1da177e4
LT		 1642 * int port : port number (0 - 127)
1643 * long baud : baud rate (50 - 115200)
1644 *
1645 * return: 0 : this port is invalid or baud < 50
1646 * 50 - 115200 : the real baud rate set to the port, if
1647 * the argument baud is large than maximun
1648 * available baud rate, the real setting
1649 * baud rate will be the maximun baud rate.
1650 *
1651 *
1da177e4
LT		 1652 * Function 12: Configure the port.
1653 * Syntax:
606d099c 1654 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1da177e4 1655 * int port : port number (0 - 127)
606d099c 1656 * struct ktermios * termio : termio structure pointer
c7bce309 1657 * speed_t baud : baud rate
1da177e4
LT		 1658 *
1659 * return: -1 : this port is invalid or termio == NULL
1660 * 0 : setting O.K.
1661 *
1662 *
1663 * Function 13: Get the DTR/RTS state of this port.
1664 * Syntax:
1665 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1666 * int port : port number (0 - 127)
1667 * int * dtrState : pointer to INT to receive the current DTR
1668 * state. (if NULL, this function will not
1669 * write to this address)
1670 * int * rtsState : pointer to INT to receive the current RTS
1671 * state. (if NULL, this function will not
1672 * write to this address)
1673 *
1674 * return: -1 : this port is invalid
1675 * 0 : O.K.
1676 *
1677 *
1678 * Function 14: Setting the DTR/RTS output state of this port.
1679 * Syntax:
1680 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1681 * int port : port number (0 - 127)
1682 * int dtrState : DTR output state (0: off, 1: on)
1683 * int rtsState : RTS output state (0: off, 1: on)
1684 *
1685 *
1686 * Function 15: Setting the flow control of this port.
1687 * Syntax:
1688 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1689 * int txFlow,int xany);
1690 * int port : port number (0 - 127)
1691 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1692 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1693 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1694 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1695 * int xany : S/W XANY flow control (0: no, 1: yes)
1696 *
1697 *
1698 * Function 16: Get ths line status of this port
1699 * Syntax:
1700 * int MoxaPortLineStatus(int port);
1701 * int port : port number (0 - 127)
1702 *
1703 * return: Bit 0 - CTS state (0: off, 1: on)
1704 * Bit 1 - DSR state (0: off, 1: on)
1705 * Bit 2 - DCD state (0: off, 1: on)
1706 *
1707 *
1da177e4
LT		 1708 * Function 19: Flush the Rx/Tx buffer data of this port.
1709 * Syntax:
1710 * void MoxaPortFlushData(int port, int mode);
1711 * int port : port number (0 - 127)
1712 * int mode
1713 * 0 : flush the Rx buffer
1714 * 1 : flush the Tx buffer
1715 * 2 : flush the Rx and Tx buffer
1716 *
1717 *
1718 * Function 20: Write data.
1719 * Syntax:
1720 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1721 * int port : port number (0 - 127)
1722 * unsigned char * buffer : pointer to write data buffer.
1723 * int length : write data length
1724 *
1725 * return: 0 - length : real write data length
1726 *
1727 *
1728 * Function 21: Read data.
1729 * Syntax:
33f0f88f 1730 * int MoxaPortReadData(int port, struct tty_struct *tty);
1da177e4 1731 * int port : port number (0 - 127)
33f0f88f 1732 * struct tty_struct *tty : tty for data
1da177e4
LT		 1733 *
1734 * return: 0 - length : real read data length
1735 *
1736 *
1da177e4
LT		 1737 * Function 24: Get the Tx buffer current queued data bytes
1738 * Syntax:
1739 * int MoxaPortTxQueue(int port);
1740 * int port : port number (0 - 127)
1741 *
1742 * return: .. : Tx buffer current queued data bytes
1743 *
1744 *
1745 * Function 25: Get the Tx buffer current free space
1746 * Syntax:
1747 * int MoxaPortTxFree(int port);
1748 * int port : port number (0 - 127)
1749 *
1750 * return: .. : Tx buffer current free space
1751 *
1752 *
1753 * Function 26: Get the Rx buffer current queued data bytes
1754 * Syntax:
1755 * int MoxaPortRxQueue(int port);
1756 * int port : port number (0 - 127)
1757 *
1758 * return: .. : Rx buffer current queued data bytes
1759 *
1760 *
1da177e4
LT		 1761 * Function 28: Disable port data transmission.
1762 * Syntax:
1763 * void MoxaPortTxDisable(int port);
1764 * int port : port number (0 - 127)
1765 *
1766 *
1767 * Function 29: Enable port data transmission.
1768 * Syntax:
1769 * void MoxaPortTxEnable(int port);
1770 * int port : port number (0 - 127)
1771 *
1772 *
1da177e4
LT		 1773 * Function 31: Get the received BREAK signal count and reset it.
1774 * Syntax:
1775 * int MoxaPortResetBrkCnt(int port);
1776 * int port : port number (0 - 127)
1777 *
1778 * return: 0 - .. : BREAK signal count
1779 *
1780 *
1da177e4 1781 */
1da177e4 1782
b4173f45 1783static void MoxaPortEnable(struct moxa_port *port)
1da177e4
LT		 1784{
1785 void __iomem *ofsAddr;
eaa95a8d 1786 u16 lowwater = 512;
1da177e4 1787
b4173f45 1788 ofsAddr = port->tableAddr;
1da177e4 1789 writew(lowwater, ofsAddr + Low_water);
08d01c79 1790 if (MOXA_IS_320(port->board))
1da177e4 1791 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
eaa95a8d
JS		 1792 else
1793 writew(readw(ofsAddr + HostStat) | WakeupBreak,
1794 ofsAddr + HostStat);
1da177e4
LT		 1795
1796 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
1797 moxafunc(ofsAddr, FC_FlushQueue, 2);
1798
1799 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
1800 MoxaPortLineStatus(port);
1801}
1802
b4173f45 1803static void MoxaPortDisable(struct moxa_port *port)
1da177e4 1804{
b4173f45 1805 void __iomem *ofsAddr = port->tableAddr;
1da177e4
LT		 1806
1807 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
1808 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
1809 writew(0, ofsAddr + HostStat);
1810 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
1811}
1812
08d01c79 1813static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
1da177e4 1814{
08d01c79
JS		 1815 void __iomem *ofsAddr = port->tableAddr;
1816 unsigned int clock, val;
1817 speed_t max;
1da177e4 1818
08d01c79
JS		 1819 max = MOXA_IS_320(port->board) ? 460800 : 921600;
1820 if (baud < 50)
eaa95a8d 1821 return 0;
1da177e4
LT		 1822 if (baud > max)
1823 baud = max;
08d01c79 1824 clock = 921600;
1da177e4
LT		 1825 val = clock / baud;
1826 moxafunc(ofsAddr, FC_SetBaud, val);
1827 baud = clock / val;
eaa95a8d 1828 return baud;
1da177e4
LT		 1829}
1830
b4173f45
JS		 1831static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
1832 speed_t baud)
1da177e4
LT		 1833{
1834 void __iomem *ofsAddr;
1835 tcflag_t cflag;
1da177e4
LT		 1836 tcflag_t mode = 0;
1837
b4173f45 1838 ofsAddr = port->tableAddr;
1da177e4
LT		 1839 cflag = termio->c_cflag; /* termio->c_cflag */
1840
1841 mode = termio->c_cflag & CSIZE;
1842 if (mode == CS5)
1843 mode = MX_CS5;
1844 else if (mode == CS6)
1845 mode = MX_CS6;
1846 else if (mode == CS7)
1847 mode = MX_CS7;
1848 else if (mode == CS8)
1849 mode = MX_CS8;
1850
1851 if (termio->c_cflag & CSTOPB) {
1852 if (mode == MX_CS5)
1853 mode |= MX_STOP15;
1854 else
1855 mode |= MX_STOP2;
1856 } else
1857 mode |= MX_STOP1;
1858
1859 if (termio->c_cflag & PARENB) {
1860 if (termio->c_cflag & PARODD)
1861 mode |= MX_PARODD;
1862 else
1863 mode |= MX_PAREVEN;
1864 } else
1865 mode |= MX_PARNONE;
1866
eaa95a8d 1867 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
1da177e4 1868
08d01c79
JS		 1869 if (MOXA_IS_320(port->board) && baud >= 921600)
1870 return -1;
1871
db1acaa6 1872 baud = MoxaPortSetBaud(port, baud);
1da177e4
LT		 1873
1874 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
1875 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
1876 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
1877 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
6f56b658 1878 moxa_wait_finish(ofsAddr);
1da177e4
LT		 1879
1880 }
eaa95a8d 1881 return baud;
1da177e4
LT		 1882}
1883
b4173f45
JS		 1884static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
1885 int *rtsState)
1da177e4 1886{
b4173f45
JS		 1887 if (dtrState)
1888 *dtrState = !!(port->lineCtrl & DTR_ON);
1889 if (rtsState)
1890 *rtsState = !!(port->lineCtrl & RTS_ON);
1891
eaa95a8d 1892 return 0;
1da177e4
LT		 1893}
1894
b4173f45 1895static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
1da177e4 1896{
eaa95a8d 1897 u8 mode = 0;
1da177e4 1898
1da177e4
LT		 1899 if (dtr)
1900 mode |= DTR_ON;
1901 if (rts)
1902 mode |= RTS_ON;
b4173f45
JS		 1903 port->lineCtrl = mode;
1904 moxafunc(port->tableAddr, FC_LineControl, mode);
1da177e4
LT		 1905}
1906
b4173f45
JS		 1907static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
1908 int txflow, int rxflow, int txany)
1da177e4 1909{
b4173f45 1910 int mode = 0;
1da177e4 1911
1da177e4
LT		 1912 if (rts)
1913 mode |= RTS_FlowCtl;
1914 if (cts)
1915 mode |= CTS_FlowCtl;
1916 if (txflow)
1917 mode |= Tx_FlowCtl;
1918 if (rxflow)
1919 mode |= Rx_FlowCtl;
1920 if (txany)
1921 mode |= IXM_IXANY;
b4173f45 1922 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
1da177e4
LT		 1923}
1924
b4173f45 1925static int MoxaPortLineStatus(struct moxa_port *port)
1da177e4
LT		 1926{
1927 void __iomem *ofsAddr;
1928 int val;
1929
b4173f45 1930 ofsAddr = port->tableAddr;
08d01c79 1931 if (MOXA_IS_320(port->board)) {
1da177e4
LT		 1932 moxafunc(ofsAddr, FC_LineStatus, 0);
1933 val = readw(ofsAddr + FuncArg);
1934 } else {
1935 val = readw(ofsAddr + FlagStat) >> 4;
1936 }
1937 val &= 0x0B;
7bcf97d1 1938 if (val & 8)
1da177e4 1939 val |= 4;
a8f5cda0 1940 spin_lock_bh(&moxa_lock);
7bcf97d1 1941 moxa_new_dcdstate(port, val & 8);
a8f5cda0 1942 spin_unlock_bh(&moxa_lock);
1da177e4 1943 val &= 7;
7bcf97d1 1944 return val;
1da177e4
LT		 1945}
1946
2108eba5
JS		 1947static int MoxaPortWriteData(struct moxa_port *port,
1948 const unsigned char *buffer, int len)
1da177e4 1949{
1da177e4 1950 void __iomem *baseAddr, *ofsAddr, *ofs;
2108eba5
JS		 1951 unsigned int c, total;
1952 u16 head, tail, tx_mask, spage, epage;
1953 u16 pageno, pageofs, bufhead;
1da177e4 1954
b4173f45
JS		 1955 ofsAddr = port->tableAddr;
1956 baseAddr = port->board->basemem;
1da177e4
LT		 1957 tx_mask = readw(ofsAddr + TX_mask);
1958 spage = readw(ofsAddr + Page_txb);
1959 epage = readw(ofsAddr + EndPage_txb);
1960 tail = readw(ofsAddr + TXwptr);
1961 head = readw(ofsAddr + TXrptr);
2108eba5 1962 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
1da177e4
LT		 1963 if (c > len)
1964 c = len;
b4173f45 1965 moxaLog.txcnt[port->tty->index] += c;
1da177e4
LT		 1966 total = c;
1967 if (spage == epage) {
1968 bufhead = readw(ofsAddr + Ofs_txb);
1969 writew(spage, baseAddr + Control_reg);
1970 while (c > 0) {
1971 if (head > tail)
1972 len = head - tail - 1;
1973 else
1974 len = tx_mask + 1 - tail;
1975 len = (c > len) ? len : c;
1976 ofs = baseAddr + DynPage_addr + bufhead + tail;
2108eba5
JS		 1977 memcpy_toio(ofs, buffer, len);
1978 buffer += len;
1da177e4
LT		 1979 tail = (tail + len) & tx_mask;
1980 c -= len;
1981 }
1da177e4 1982 } else {
1da177e4
LT		 1983 pageno = spage + (tail >> 13);
1984 pageofs = tail & Page_mask;
2108eba5
JS		 1985 while (c > 0) {
1986 len = Page_size - pageofs;
1987 if (len > c)
1988 len = c;
1da177e4
LT		 1989 writeb(pageno, baseAddr + Control_reg);
1990 ofs = baseAddr + DynPage_addr + pageofs;
2108eba5
JS		 1991 memcpy_toio(ofs, buffer, len);
1992 buffer += len;
1da177e4
LT		 1993 if (++pageno == epage)
1994 pageno = spage;
1995 pageofs = 0;
2108eba5
JS		 1996 c -= len;
1997 }
1998 tail = (tail + total) & tx_mask;
1da177e4 1999 }
2108eba5 2000 writew(tail, ofsAddr + TXwptr);
1da177e4 2001 writeb(1, ofsAddr + CD180TXirq); /* start to send */
2108eba5 2002 return total;
1da177e4
LT		 2003}
2004
7bcf97d1 2005static int MoxaPortReadData(struct moxa_port *port)
1da177e4 2006{
7bcf97d1 2007 struct tty_struct *tty = port->tty;
2108eba5 2008 unsigned char *dst;
1da177e4 2009 void __iomem *baseAddr, *ofsAddr, *ofs;
2108eba5
JS		 2010 unsigned int count, len, total;
2011 u16 tail, rx_mask, spage, epage;
2012 u16 pageno, pageofs, bufhead, head;
1da177e4 2013
b4173f45
JS		 2014 ofsAddr = port->tableAddr;
2015 baseAddr = port->board->basemem;
1da177e4
LT		 2016 head = readw(ofsAddr + RXrptr);
2017 tail = readw(ofsAddr + RXwptr);
2018 rx_mask = readw(ofsAddr + RX_mask);
2019 spage = readw(ofsAddr + Page_rxb);
2020 epage = readw(ofsAddr + EndPage_rxb);
2108eba5 2021 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
1da177e4 2022 if (count == 0)
33f0f88f 2023 return 0;
1da177e4 2024
33f0f88f 2025 total = count;
7bcf97d1 2026 moxaLog.rxcnt[tty->index] += total;
1da177e4
LT		 2027 if (spage == epage) {
2028 bufhead = readw(ofsAddr + Ofs_rxb);
2029 writew(spage, baseAddr + Control_reg);
2030 while (count > 0) {
1da177e4 2031 ofs = baseAddr + DynPage_addr + bufhead + head;
2108eba5
JS		 2032 len = (tail >= head) ? (tail - head) :
2033 (rx_mask + 1 - head);
2034 len = tty_prepare_flip_string(tty, &dst,
2035 min(len, count));
2036 memcpy_fromio(dst, ofs, len);
1da177e4
LT		 2037 head = (head + len) & rx_mask;
2038 count -= len;
2039 }
1da177e4 2040 } else {
1da177e4
LT		 2041 pageno = spage + (head >> 13);
2042 pageofs = head & Page_mask;
2108eba5 2043 while (count > 0) {
1da177e4
LT		 2044 writew(pageno, baseAddr + Control_reg);
2045 ofs = baseAddr + DynPage_addr + pageofs;
2108eba5
JS		 2046 len = tty_prepare_flip_string(tty, &dst,
2047 min(Page_size - pageofs, count));
2048 memcpy_fromio(dst, ofs, len);
2049
2050 count -= len;
2051 pageofs = (pageofs + len) & Page_mask;
2052 if (pageofs == 0 && ++pageno == epage)
1da177e4 2053 pageno = spage;
2108eba5
JS		 2054 }
2055 head = (head + total) & rx_mask;
1da177e4 2056 }
2108eba5
JS		 2057 writew(head, ofsAddr + RXrptr);
2058 if (readb(ofsAddr + FlagStat) & Xoff_state) {
1da177e4 2059 moxaLowWaterChk = 1;
b4173f45 2060 port->lowChkFlag = 1;
1da177e4 2061 }
2108eba5 2062 return total;
1da177e4
LT		 2063}
2064
2065
b4173f45 2066static int MoxaPortTxQueue(struct moxa_port *port)
1da177e4 2067{
b4173f45 2068 void __iomem *ofsAddr = port->tableAddr;
2108eba5 2069 u16 rptr, wptr, mask;
1da177e4 2070
1da177e4
LT		 2071 rptr = readw(ofsAddr + TXrptr);
2072 wptr = readw(ofsAddr + TXwptr);
2073 mask = readw(ofsAddr + TX_mask);
2108eba5 2074 return (wptr - rptr) & mask;
1da177e4
LT		 2075}
2076
b4173f45 2077static int MoxaPortTxFree(struct moxa_port *port)
1da177e4 2078{
b4173f45 2079 void __iomem *ofsAddr = port->tableAddr;
2108eba5 2080 u16 rptr, wptr, mask;
1da177e4 2081
1da177e4
LT		 2082 rptr = readw(ofsAddr + TXrptr);
2083 wptr = readw(ofsAddr + TXwptr);
2084 mask = readw(ofsAddr + TX_mask);
2108eba5 2085 return mask - ((wptr - rptr) & mask);
1da177e4
LT		 2086}
2087
b4173f45 2088static int MoxaPortRxQueue(struct moxa_port *port)
1da177e4 2089{
b4173f45 2090 void __iomem *ofsAddr = port->tableAddr;
2108eba5 2091 u16 rptr, wptr, mask;
1da177e4 2092
1da177e4
LT		 2093 rptr = readw(ofsAddr + RXrptr);
2094 wptr = readw(ofsAddr + RXwptr);
2095 mask = readw(ofsAddr + RX_mask);
2108eba5 2096 return (wptr - rptr) & mask;
1da177e4
LT		 2097}
2098
b4173f45 2099static void MoxaPortTxDisable(struct moxa_port *port)
1da177e4 2100{
b4173f45 2101 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
1da177e4
LT		 2102}
2103
b4173f45 2104static void MoxaPortTxEnable(struct moxa_port *port)
1da177e4 2105{
b4173f45 2106 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
1da177e4
LT		 2107}
2108
8f8ecbad 2109static int moxa_get_serial_info(struct moxa_port *info,
eaa95a8d 2110 struct serial_struct __user *retinfo)
1da177e4 2111{
eaa95a8d
JS		 2112 struct serial_struct tmp = {
2113 .type = info->type,
2114 .line = info->tty->index,
2115 .flags = info->asyncflags,
2116 .baud_base = 921600,
2117 .close_delay = info->close_delay
2118 };
2119 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
1da177e4
LT		 2120}
2121
2122
8f8ecbad 2123static int moxa_set_serial_info(struct moxa_port *info,
eaa95a8d 2124 struct serial_struct __user *new_info)
1da177e4
LT		 2125{
2126 struct serial_struct new_serial;
2127
eaa95a8d 2128 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1da177e4
LT		 2129 return -EFAULT;
2130
eaa95a8d
JS		 2131 if (new_serial.irq != 0 || new_serial.port != 0 ||
2132 new_serial.custom_divisor != 0 ||
2133 new_serial.baud_base != 921600)
2134 return -EPERM;
1da177e4
LT		 2135
2136 if (!capable(CAP_SYS_ADMIN)) {
2137 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
2138 (info->asyncflags & ~ASYNC_USR_MASK)))
eaa95a8d
JS		 2139 return -EPERM;
2140 } else
1da177e4 2141 info->close_delay = new_serial.close_delay * HZ / 100;
1da177e4
LT		 2142
2143 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
2144 new_serial.flags |= (info->asyncflags & ASYNC_FLAGS);
2145
eaa95a8d 2146 MoxaSetFifo(info, new_serial.type == PORT_16550A);
1da177e4
LT		 2147
2148 info->type = new_serial.type;
eaa95a8d 2149 return 0;
1da177e4
LT		 2150}
2151
2152
2153
2154/*****************************************************************************
2155 * Static local functions: *
2156 *****************************************************************************/
1da177e4 2157
b4173f45 2158static void MoxaSetFifo(struct moxa_port *port, int enable)
1da177e4 2159{
b4173f45 2160 void __iomem *ofsAddr = port->tableAddr;
1da177e4
LT		 2161
2162 if (!enable) {
2163 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2164 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2165 } else {
2166 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2167 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
2168 }
2169}
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