Char: moxa, timer cleanup
[deliverable/linux.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>
95e07914 45#include <linux/completion.h>
1da177e4
LT
46
47#include <asm/system.h>
48#include <asm/io.h>
49#include <asm/uaccess.h>
50
03718234
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51#include "moxa.h"
52
11324edd 53#define MOXA_VERSION "5.1k"
1da177e4 54
03718234
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55#define MOXA_FW_HDRLEN 32
56
11324edd
JS
57#define MOXAMAJOR 172
58#define MOXACUMAJOR 173
1da177e4 59
11324edd 60#define MAX_BOARDS 4 /* Don't change this value */
1da177e4 61#define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
11324edd 62#define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
1da177e4
LT
63
64/*
65 * Define the Moxa PCI vendor and device IDs.
66 */
11324edd
JS
67#define MOXA_BUS_TYPE_ISA 0
68#define MOXA_BUS_TYPE_PCI 1
1da177e4 69
1da177e4
LT
70enum {
71 MOXA_BOARD_C218_PCI = 1,
72 MOXA_BOARD_C218_ISA,
73 MOXA_BOARD_C320_PCI,
74 MOXA_BOARD_C320_ISA,
75 MOXA_BOARD_CP204J,
76};
77
78static char *moxa_brdname[] =
79{
80 "C218 Turbo PCI series",
81 "C218 Turbo ISA series",
82 "C320 Turbo PCI series",
83 "C320 Turbo ISA series",
84 "CP-204J series",
85};
86
87#ifdef CONFIG_PCI
88static struct pci_device_id moxa_pcibrds[] = {
5ebb4078
JS
89 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218),
90 .driver_data = MOXA_BOARD_C218_PCI },
91 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320),
92 .driver_data = MOXA_BOARD_C320_PCI },
93 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J),
94 .driver_data = MOXA_BOARD_CP204J },
1da177e4
LT
95 { 0 }
96};
97MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
98#endif /* CONFIG_PCI */
99
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100struct moxa_port;
101
8f8ecbad 102static struct moxa_board_conf {
1da177e4
LT
103 int boardType;
104 int numPorts;
1da177e4 105 int busType;
8f8ecbad 106
810ab09b 107 unsigned int ready;
8f8ecbad 108
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109 struct moxa_port *ports;
110
8f8ecbad
JS
111 void __iomem *basemem;
112 void __iomem *intNdx;
113 void __iomem *intPend;
114 void __iomem *intTable;
115} moxa_boards[MAX_BOARDS];
116
117struct mxser_mstatus {
118 tcflag_t cflag;
119 int cts;
120 int dsr;
121 int ri;
122 int dcd;
9dff89cd 123};
1da177e4 124
8f8ecbad
JS
125struct moxaq_str {
126 int inq;
127 int outq;
128};
1da177e4 129
8f8ecbad 130struct moxa_port {
b4173f45 131 struct moxa_board_conf *board;
1da177e4 132 int type;
1da177e4 133 int close_delay;
1da177e4
LT
134 int count;
135 int blocked_open;
1da177e4
LT
136 int asyncflags;
137 unsigned long statusflags;
138 struct tty_struct *tty;
139 int cflag;
140 wait_queue_head_t open_wait;
95e07914 141 struct completion close_wait;
1da177e4 142
8f8ecbad 143 struct timer_list emptyTimer;
1da177e4 144
8f8ecbad
JS
145 char lineCtrl;
146 void __iomem *tableAddr;
8f8ecbad
JS
147 char DCDState;
148 char lowChkFlag;
149
150 ushort breakCnt;
151};
1da177e4
LT
152
153/* statusflags */
154#define TXSTOPPED 0x1
155#define LOWWAIT 0x2
156#define EMPTYWAIT 0x4
157#define THROTTLE 0x8
158
1da177e4
LT
159#define SERIAL_DO_RESTART
160
1da177e4
LT
161#define WAKEUP_CHARS 256
162
1da177e4
LT
163static int ttymajor = MOXAMAJOR;
164/* Variables for insmod */
165#ifdef MODULE
d353eca4
JS
166static unsigned long baseaddr[MAX_BOARDS];
167static unsigned int type[MAX_BOARDS];
168static unsigned int numports[MAX_BOARDS];
1da177e4
LT
169#endif
170
171MODULE_AUTHOR("William Chen");
172MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
173MODULE_LICENSE("GPL");
174#ifdef MODULE
d353eca4
JS
175module_param_array(type, uint, NULL, 0);
176MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
177module_param_array(baseaddr, ulong, NULL, 0);
178MODULE_PARM_DESC(baseaddr, "base address");
179module_param_array(numports, uint, NULL, 0);
180MODULE_PARM_DESC(numports, "numports (ignored for C218)");
1da177e4
LT
181#endif
182module_param(ttymajor, int, 0);
1da177e4 183
1da177e4
LT
184/*
185 * static functions:
186 */
1da177e4
LT
187static int moxa_open(struct tty_struct *, struct file *);
188static void moxa_close(struct tty_struct *, struct file *);
189static int moxa_write(struct tty_struct *, const unsigned char *, int);
190static int moxa_write_room(struct tty_struct *);
191static void moxa_flush_buffer(struct tty_struct *);
192static int moxa_chars_in_buffer(struct tty_struct *);
193static void moxa_flush_chars(struct tty_struct *);
194static void moxa_put_char(struct tty_struct *, unsigned char);
195static int moxa_ioctl(struct tty_struct *, struct file *, unsigned int, unsigned long);
196static void moxa_throttle(struct tty_struct *);
197static void moxa_unthrottle(struct tty_struct *);
606d099c 198static void moxa_set_termios(struct tty_struct *, struct ktermios *);
1da177e4
LT
199static void moxa_stop(struct tty_struct *);
200static void moxa_start(struct tty_struct *);
201static void moxa_hangup(struct tty_struct *);
202static int moxa_tiocmget(struct tty_struct *tty, struct file *file);
203static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
204 unsigned int set, unsigned int clear);
205static void moxa_poll(unsigned long);
db1acaa6 206static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
6f56b658 207static int moxa_block_till_ready(struct tty_struct *, struct file *,
8f8ecbad 208 struct moxa_port *);
6f56b658
JS
209static void moxa_setup_empty_event(struct tty_struct *);
210static void moxa_check_xmit_empty(unsigned long);
211static void moxa_shut_down(struct moxa_port *);
212static void moxa_receive_data(struct moxa_port *);
1da177e4
LT
213/*
214 * moxa board interface functions:
215 */
b4173f45 216static int MoxaDriverIoctl(struct tty_struct *, unsigned int, unsigned long);
1da177e4 217static int MoxaDriverPoll(void);
b4173f45
JS
218static void MoxaPortEnable(struct moxa_port *);
219static void MoxaPortDisable(struct moxa_port *);
220static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
221static int MoxaPortGetLineOut(struct moxa_port *, int *, int *);
222static void MoxaPortLineCtrl(struct moxa_port *, int, int);
223static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
224static int MoxaPortLineStatus(struct moxa_port *);
225static int MoxaPortDCDChange(struct moxa_port *);
226static int MoxaPortDCDON(struct moxa_port *);
227static void MoxaPortFlushData(struct moxa_port *, int);
228static int MoxaPortWriteData(struct moxa_port *, unsigned char *, int);
229static int MoxaPortReadData(struct moxa_port *, struct tty_struct *tty);
230static int MoxaPortTxQueue(struct moxa_port *);
231static int MoxaPortRxQueue(struct moxa_port *);
232static int MoxaPortTxFree(struct moxa_port *);
233static void MoxaPortTxDisable(struct moxa_port *);
234static void MoxaPortTxEnable(struct moxa_port *);
235static int MoxaPortResetBrkCnt(struct moxa_port *);
236static void MoxaPortSendBreak(struct moxa_port *, int);
8f8ecbad
JS
237static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *);
238static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *);
b4173f45 239static void MoxaSetFifo(struct moxa_port *port, int enable);
1da177e4 240
b68e31d0 241static const struct tty_operations moxa_ops = {
1da177e4
LT
242 .open = moxa_open,
243 .close = moxa_close,
244 .write = moxa_write,
245 .write_room = moxa_write_room,
246 .flush_buffer = moxa_flush_buffer,
247 .chars_in_buffer = moxa_chars_in_buffer,
248 .flush_chars = moxa_flush_chars,
249 .put_char = moxa_put_char,
250 .ioctl = moxa_ioctl,
251 .throttle = moxa_throttle,
252 .unthrottle = moxa_unthrottle,
253 .set_termios = moxa_set_termios,
254 .stop = moxa_stop,
255 .start = moxa_start,
256 .hangup = moxa_hangup,
257 .tiocmget = moxa_tiocmget,
258 .tiocmset = moxa_tiocmset,
259};
260
aa7e5221 261static struct tty_driver *moxaDriver;
aa7e5221 262static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
34af946a 263static DEFINE_SPINLOCK(moxa_lock);
33f0f88f 264
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265static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
266{
267 switch (brd->boardType) {
268 case MOXA_BOARD_C218_ISA:
269 case MOXA_BOARD_C218_PCI:
270 if (model != 1)
271 goto err;
272 break;
273 case MOXA_BOARD_CP204J:
274 if (model != 3)
275 goto err;
276 break;
277 default:
278 if (model != 2)
279 goto err;
280 break;
281 }
282 return 0;
283err:
284 return -EINVAL;
285}
286
287static int moxa_check_fw(const void *ptr)
288{
289 const __le16 *lptr = ptr;
290
291 if (*lptr != cpu_to_le16(0x7980))
292 return -EINVAL;
293
294 return 0;
295}
296
297static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
298 size_t len)
299{
300 void __iomem *baseAddr = brd->basemem;
301 u16 tmp;
302
303 writeb(HW_reset, baseAddr + Control_reg); /* reset */
304 msleep(10);
305 memset_io(baseAddr, 0, 4096);
306 memcpy_toio(baseAddr, buf, len); /* download BIOS */
307 writeb(0, baseAddr + Control_reg); /* restart */
308
309 msleep(2000);
310
311 switch (brd->boardType) {
312 case MOXA_BOARD_C218_ISA:
313 case MOXA_BOARD_C218_PCI:
314 tmp = readw(baseAddr + C218_key);
315 if (tmp != C218_KeyCode)
316 goto err;
317 break;
318 case MOXA_BOARD_CP204J:
319 tmp = readw(baseAddr + C218_key);
320 if (tmp != CP204J_KeyCode)
321 goto err;
322 break;
323 default:
324 tmp = readw(baseAddr + C320_key);
325 if (tmp != C320_KeyCode)
326 goto err;
327 tmp = readw(baseAddr + C320_status);
328 if (tmp != STS_init) {
329 printk(KERN_ERR "moxa: bios upload failed -- CPU/Basic "
330 "module not found\n");
331 return -EIO;
332 }
333 break;
334 }
335
336 return 0;
337err:
338 printk(KERN_ERR "moxa: bios upload failed -- board not found\n");
339 return -EIO;
340}
341
342static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
343 size_t len)
344{
345 void __iomem *baseAddr = brd->basemem;
346
347 if (len < 7168) {
348 printk(KERN_ERR "moxa: invalid 320 bios -- too short\n");
349 return -EINVAL;
350 }
351
352 writew(len - 7168 - 2, baseAddr + C320bapi_len);
353 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
354 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
355 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
356 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
357
358 return 0;
359}
360
5292bcd3 361static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
03718234
JS
362 size_t len)
363{
364 void __iomem *baseAddr = brd->basemem;
365 const u16 *uptr = ptr;
366 size_t wlen, len2, j;
5292bcd3
JS
367 unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
368 unsigned int i, retry, c320;
03718234
JS
369 u16 usum, keycode;
370
5292bcd3
JS
371 c320 = brd->boardType == MOXA_BOARD_C320_PCI ||
372 brd->boardType == MOXA_BOARD_C320_ISA;
373 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
374 C218_KeyCode;
03718234 375
5292bcd3
JS
376 switch (brd->boardType) {
377 case MOXA_BOARD_CP204J:
378 case MOXA_BOARD_C218_ISA:
379 case MOXA_BOARD_C218_PCI:
380 key = C218_key;
381 loadbuf = C218_LoadBuf;
382 loadlen = C218DLoad_len;
383 checksum = C218check_sum;
384 checksum_ok = C218chksum_ok;
385 break;
386 default:
387 key = C320_key;
388 keycode = C320_KeyCode;
389 loadbuf = C320_LoadBuf;
390 loadlen = C320DLoad_len;
391 checksum = C320check_sum;
392 checksum_ok = C320chksum_ok;
393 break;
03718234 394 }
03718234
JS
395
396 usum = 0;
397 wlen = len >> 1;
398 for (i = 0; i < wlen; i++)
399 usum += le16_to_cpu(uptr[i]);
400 retry = 0;
401 do {
402 wlen = len >> 1;
403 j = 0;
404 while (wlen) {
405 len2 = (wlen > 2048) ? 2048 : wlen;
406 wlen -= len2;
5292bcd3 407 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
03718234 408 j += len2 << 1;
5292bcd3
JS
409
410 writew(len2, baseAddr + loadlen);
411 writew(0, baseAddr + key);
412 for (i = 0; i < 100; i++) {
413 if (readw(baseAddr + key) == keycode)
03718234
JS
414 break;
415 msleep(10);
416 }
5292bcd3 417 if (readw(baseAddr + key) != keycode)
03718234
JS
418 return -EIO;
419 }
5292bcd3
JS
420 writew(0, baseAddr + loadlen);
421 writew(usum, baseAddr + checksum);
422 writew(0, baseAddr + key);
423 for (i = 0; i < 100; i++) {
424 if (readw(baseAddr + key) == keycode)
03718234
JS
425 break;
426 msleep(10);
427 }
428 retry++;
5292bcd3
JS
429 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
430 if (readb(baseAddr + checksum_ok) != 1)
03718234
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431 return -EIO;
432
5292bcd3 433 writew(0, baseAddr + key);
03718234
JS
434 for (i = 0; i < 600; i++) {
435 if (readw(baseAddr + Magic_no) == Magic_code)
436 break;
437 msleep(10);
438 }
439 if (readw(baseAddr + Magic_no) != Magic_code)
440 return -EIO;
441
5292bcd3
JS
442 if (c320) {
443 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
444 writew(0x3800, baseAddr + TMS320_PORT1);
445 writew(0x3900, baseAddr + TMS320_PORT2);
446 writew(28499, baseAddr + TMS320_CLOCK);
447 } else {
448 writew(0x3200, baseAddr + TMS320_PORT1);
449 writew(0x3400, baseAddr + TMS320_PORT2);
450 writew(19999, baseAddr + TMS320_CLOCK);
451 }
03718234
JS
452 }
453 writew(1, baseAddr + Disable_IRQ);
454 writew(0, baseAddr + Magic_no);
455 for (i = 0; i < 500; i++) {
456 if (readw(baseAddr + Magic_no) == Magic_code)
457 break;
458 msleep(10);
459 }
460 if (readw(baseAddr + Magic_no) != Magic_code)
461 return -EIO;
462
5292bcd3
JS
463 if (c320) {
464 j = readw(baseAddr + Module_cnt);
465 if (j <= 0)
466 return -EIO;
467 brd->numPorts = j * 8;
468 writew(j, baseAddr + Module_no);
469 writew(0, baseAddr + Magic_no);
470 for (i = 0; i < 600; i++) {
471 if (readw(baseAddr + Magic_no) == Magic_code)
472 break;
473 msleep(10);
474 }
475 if (readw(baseAddr + Magic_no) != Magic_code)
476 return -EIO;
03718234 477 }
03718234
JS
478 brd->intNdx = baseAddr + IRQindex;
479 brd->intPend = baseAddr + IRQpending;
480 brd->intTable = baseAddr + IRQtable;
481
482 return 0;
483}
484
485static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
486 size_t len)
487{
488 void __iomem *ofsAddr, *baseAddr = brd->basemem;
489 struct moxa_port *port;
490 int retval, i;
491
492 if (len % 2) {
5292bcd3 493 printk(KERN_ERR "moxa: bios length is not even\n");
03718234
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494 return -EINVAL;
495 }
496
5292bcd3
JS
497 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
498 if (retval)
499 return retval;
500
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501 switch (brd->boardType) {
502 case MOXA_BOARD_C218_ISA:
503 case MOXA_BOARD_C218_PCI:
504 case MOXA_BOARD_CP204J:
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JS
505 port = brd->ports;
506 for (i = 0; i < brd->numPorts; i++, port++) {
b4173f45 507 port->board = brd;
03718234
JS
508 port->DCDState = 0;
509 port->tableAddr = baseAddr + Extern_table +
510 Extern_size * i;
511 ofsAddr = port->tableAddr;
512 writew(C218rx_mask, ofsAddr + RX_mask);
513 writew(C218tx_mask, ofsAddr + TX_mask);
514 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
515 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
516
517 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
518 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
519
520 }
521 break;
522 default:
03718234
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523 port = brd->ports;
524 for (i = 0; i < brd->numPorts; i++, port++) {
b4173f45 525 port->board = brd;
03718234
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526 port->DCDState = 0;
527 port->tableAddr = baseAddr + Extern_table +
528 Extern_size * i;
529 ofsAddr = port->tableAddr;
530 switch (brd->numPorts) {
531 case 8:
532 writew(C320p8rx_mask, ofsAddr + RX_mask);
533 writew(C320p8tx_mask, ofsAddr + TX_mask);
534 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
535 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
536 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
537 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
538
539 break;
540 case 16:
541 writew(C320p16rx_mask, ofsAddr + RX_mask);
542 writew(C320p16tx_mask, ofsAddr + TX_mask);
543 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
544 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
545 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
546 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
547 break;
548
549 case 24:
550 writew(C320p24rx_mask, ofsAddr + RX_mask);
551 writew(C320p24tx_mask, ofsAddr + TX_mask);
552 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
553 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
554 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
555 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
556 break;
557 case 32:
558 writew(C320p32rx_mask, ofsAddr + RX_mask);
559 writew(C320p32tx_mask, ofsAddr + TX_mask);
560 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
561 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
562 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
563 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
564 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
565 break;
566 }
567 }
568 break;
569 }
03718234
JS
570 return 0;
571}
572
573static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
574{
575 void *ptr = fw->data;
576 char rsn[64];
577 u16 lens[5];
578 size_t len;
579 unsigned int a, lenp, lencnt;
580 int ret = -EINVAL;
581 struct {
582 __le32 magic; /* 0x34303430 */
583 u8 reserved1[2];
584 u8 type; /* UNIX = 3 */
585 u8 model; /* C218T=1, C320T=2, CP204=3 */
586 u8 reserved2[8];
587 __le16 len[5];
588 } *hdr = ptr;
589
590 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
591
592 if (fw->size < MOXA_FW_HDRLEN) {
593 strcpy(rsn, "too short (even header won't fit)");
594 goto err;
595 }
596 if (hdr->magic != cpu_to_le32(0x30343034)) {
597 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
598 goto err;
599 }
600 if (hdr->type != 3) {
601 sprintf(rsn, "not for linux, type is %u", hdr->type);
602 goto err;
603 }
604 if (moxa_check_fw_model(brd, hdr->model)) {
605 sprintf(rsn, "not for this card, model is %u", hdr->model);
606 goto err;
607 }
608
609 len = MOXA_FW_HDRLEN;
610 lencnt = hdr->model == 2 ? 5 : 3;
611 for (a = 0; a < ARRAY_SIZE(lens); a++) {
612 lens[a] = le16_to_cpu(hdr->len[a]);
613 if (lens[a] && len + lens[a] <= fw->size &&
614 moxa_check_fw(&fw->data[len]))
615 printk(KERN_WARNING "moxa firmware: unexpected input "
616 "at offset %u, but going on\n", (u32)len);
617 if (!lens[a] && a < lencnt) {
618 sprintf(rsn, "too few entries in fw file");
619 goto err;
620 }
621 len += lens[a];
622 }
623
624 if (len != fw->size) {
625 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
626 (u32)len);
627 goto err;
628 }
629
630 ptr += MOXA_FW_HDRLEN;
631 lenp = 0; /* bios */
632
633 strcpy(rsn, "read above");
634
635 ret = moxa_load_bios(brd, ptr, lens[lenp]);
636 if (ret)
637 goto err;
638
639 /* we skip the tty section (lens[1]), since we don't need it */
640 ptr += lens[lenp] + lens[lenp + 1];
641 lenp += 2; /* comm */
642
643 if (hdr->model == 2) {
644 ret = moxa_load_320b(brd, ptr, lens[lenp]);
645 if (ret)
646 goto err;
647 /* skip another tty */
648 ptr += lens[lenp] + lens[lenp + 1];
649 lenp += 2;
650 }
651
652 ret = moxa_load_code(brd, ptr, lens[lenp]);
653 if (ret)
654 goto err;
655
656 return 0;
657err:
658 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
659 return ret;
660}
661
662static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
663{
664 const struct firmware *fw;
665 const char *file;
810ab09b
JS
666 struct moxa_port *p;
667 unsigned int i;
03718234
JS
668 int ret;
669
810ab09b
JS
670 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
671 GFP_KERNEL);
672 if (brd->ports == NULL) {
673 printk(KERN_ERR "cannot allocate memory for ports\n");
674 ret = -ENOMEM;
675 goto err;
676 }
677
678 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
679 p->type = PORT_16550A;
680 p->close_delay = 5 * HZ / 10;
681 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
682 init_waitqueue_head(&p->open_wait);
683 init_completion(&p->close_wait);
684
685 setup_timer(&p->emptyTimer, moxa_check_xmit_empty,
686 (unsigned long)p);
687 }
688
03718234
JS
689 switch (brd->boardType) {
690 case MOXA_BOARD_C218_ISA:
691 case MOXA_BOARD_C218_PCI:
692 file = "c218tunx.cod";
693 break;
694 case MOXA_BOARD_CP204J:
695 file = "cp204unx.cod";
696 break;
697 default:
698 file = "c320tunx.cod";
699 break;
700 }
701
702 ret = request_firmware(&fw, file, dev);
703 if (ret) {
704 printk(KERN_ERR "request_firmware failed\n");
810ab09b 705 goto err_free;
03718234
JS
706 }
707
708 ret = moxa_load_fw(brd, fw);
709
710 release_firmware(fw);
810ab09b
JS
711
712 if (ret)
713 goto err_free;
714
715 brd->ready = 1;
716
0bcc4caa
JS
717 if (!timer_pending(&moxaTimer))
718 mod_timer(&moxaTimer, jiffies + HZ / 50);
719
810ab09b
JS
720 return 0;
721err_free:
722 kfree(brd->ports);
723err:
03718234
JS
724 return ret;
725}
726
810ab09b
JS
727static void moxa_board_deinit(struct moxa_board_conf *brd)
728{
729 unsigned int i;
730
731 brd->ready = 0;
732 for (i = 0; i < MAX_PORTS_PER_BOARD; i++)
733 del_timer_sync(&brd->ports[i].emptyTimer);
734
735 iounmap(brd->basemem);
736 brd->basemem = NULL;
737 kfree(brd->ports);
738}
739
1da177e4 740#ifdef CONFIG_PCI
9cde5bf0
JS
741static int __devinit moxa_pci_probe(struct pci_dev *pdev,
742 const struct pci_device_id *ent)
1da177e4 743{
9cde5bf0
JS
744 struct moxa_board_conf *board;
745 unsigned int i;
746 int board_type = ent->driver_data;
747 int retval;
748
749 retval = pci_enable_device(pdev);
7aeb95da
JS
750 if (retval) {
751 dev_err(&pdev->dev, "can't enable pci device\n");
9cde5bf0 752 goto err;
7aeb95da 753 }
9cde5bf0
JS
754
755 for (i = 0; i < MAX_BOARDS; i++)
756 if (moxa_boards[i].basemem == NULL)
757 break;
758
759 retval = -ENODEV;
760 if (i >= MAX_BOARDS) {
7aeb95da 761 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
9cde5bf0
JS
762 "found. Board is ignored.\n", MAX_BOARDS);
763 goto err;
764 }
765
766 board = &moxa_boards[i];
e46a5e3f
JS
767
768 retval = pci_request_region(pdev, 2, "moxa-base");
769 if (retval) {
770 dev_err(&pdev->dev, "can't request pci region 2\n");
771 goto err;
772 }
773
774 board->basemem = ioremap(pci_resource_start(pdev, 2), 0x4000);
7aeb95da
JS
775 if (board->basemem == NULL) {
776 dev_err(&pdev->dev, "can't remap io space 2\n");
e46a5e3f 777 goto err_reg;
7aeb95da 778 }
9cde5bf0 779
1da177e4
LT
780 board->boardType = board_type;
781 switch (board_type) {
782 case MOXA_BOARD_C218_ISA:
783 case MOXA_BOARD_C218_PCI:
784 board->numPorts = 8;
785 break;
786
787 case MOXA_BOARD_CP204J:
788 board->numPorts = 4;
789 break;
790 default:
791 board->numPorts = 0;
792 break;
793 }
794 board->busType = MOXA_BUS_TYPE_PCI;
a784bf7c 795
03718234
JS
796 retval = moxa_init_board(board, &pdev->dev);
797 if (retval)
798 goto err_base;
799
9cde5bf0 800 pci_set_drvdata(pdev, board);
1da177e4
LT
801
802 return (0);
03718234
JS
803err_base:
804 iounmap(board->basemem);
805 board->basemem = NULL;
e46a5e3f
JS
806err_reg:
807 pci_release_region(pdev, 2);
9cde5bf0
JS
808err:
809 return retval;
810}
811
812static void __devexit moxa_pci_remove(struct pci_dev *pdev)
813{
814 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
815
810ab09b
JS
816 moxa_board_deinit(brd);
817
e46a5e3f 818 pci_release_region(pdev, 2);
1da177e4 819}
a784bf7c
JS
820
821static struct pci_driver moxa_pci_driver = {
822 .name = "moxa",
823 .id_table = moxa_pcibrds,
824 .probe = moxa_pci_probe,
825 .remove = __devexit_p(moxa_pci_remove)
826};
1da177e4
LT
827#endif /* CONFIG_PCI */
828
829static int __init moxa_init(void)
830{
810ab09b 831 unsigned int isabrds = 0;
d353eca4 832 int retval = 0;
1da177e4 833
7aeb95da
JS
834 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
835 MOXA_VERSION);
1da177e4
LT
836 moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
837 if (!moxaDriver)
838 return -ENOMEM;
839
1da177e4 840 moxaDriver->owner = THIS_MODULE;
9b4e3b13 841 moxaDriver->name = "ttyMX";
1da177e4
LT
842 moxaDriver->major = ttymajor;
843 moxaDriver->minor_start = 0;
844 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
845 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
846 moxaDriver->init_termios = tty_std_termios;
1da177e4 847 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
606d099c
AC
848 moxaDriver->init_termios.c_ispeed = 9600;
849 moxaDriver->init_termios.c_ospeed = 9600;
1da177e4
LT
850 moxaDriver->flags = TTY_DRIVER_REAL_RAW;
851 tty_set_operations(moxaDriver, &moxa_ops);
852
7aeb95da 853 pr_debug("Moxa tty devices major number = %d\n", ttymajor);
1da177e4
LT
854
855 if (tty_register_driver(moxaDriver)) {
856 printk(KERN_ERR "Couldn't install MOXA Smartio family driver !\n");
857 put_tty_driver(moxaDriver);
858 return -1;
859 }
1da177e4 860
d353eca4 861 /* Find the boards defined from module args. */
1da177e4 862#ifdef MODULE
d353eca4
JS
863 {
864 struct moxa_board_conf *brd = moxa_boards;
810ab09b 865 unsigned int i;
1da177e4 866 for (i = 0; i < MAX_BOARDS; i++) {
d353eca4
JS
867 if (!baseaddr[i])
868 break;
869 if (type[i] == MOXA_BOARD_C218_ISA ||
870 type[i] == MOXA_BOARD_C320_ISA) {
7aeb95da 871 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
d353eca4
JS
872 isabrds + 1, moxa_brdname[type[i] - 1],
873 baseaddr[i]);
874 brd->boardType = type[i];
875 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
876 numports[i];
877 brd->busType = MOXA_BUS_TYPE_ISA;
878 brd->basemem = ioremap(baseaddr[i], 0x4000);
879 if (!brd->basemem) {
880 printk(KERN_ERR "moxa: can't remap %lx\n",
881 baseaddr[i]);
1da177e4
LT
882 continue;
883 }
03718234
JS
884 if (moxa_init_board(brd, NULL)) {
885 iounmap(brd->basemem);
886 brd->basemem = NULL;
887 continue;
888 }
d353eca4
JS
889
890 brd++;
891 isabrds++;
1da177e4
LT
892 }
893 }
d353eca4 894 }
1da177e4 895#endif
a784bf7c 896
1da177e4 897#ifdef CONFIG_PCI
a784bf7c
JS
898 retval = pci_register_driver(&moxa_pci_driver);
899 if (retval) {
900 printk(KERN_ERR "Can't register moxa pci driver!\n");
d353eca4 901 if (isabrds)
a784bf7c 902 retval = 0;
1da177e4
LT
903 }
904#endif
a784bf7c 905
a784bf7c 906 return retval;
1da177e4
LT
907}
908
909static void __exit moxa_exit(void)
910{
911 int i;
912
c251ae0d 913 del_timer_sync(&moxaTimer);
1da177e4 914
1da177e4 915 if (tty_unregister_driver(moxaDriver))
7aeb95da
JS
916 printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
917 "serial driver\n");
1da177e4 918 put_tty_driver(moxaDriver);
86fbf148 919
9cde5bf0 920#ifdef CONFIG_PCI
a784bf7c 921 pci_unregister_driver(&moxa_pci_driver);
9cde5bf0 922#endif
a784bf7c 923
810ab09b
JS
924 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
925 if (moxa_boards[i].ready)
926 moxa_board_deinit(&moxa_boards[i]);
1da177e4
LT
927}
928
929module_init(moxa_init);
930module_exit(moxa_exit);
931
1da177e4
LT
932static int moxa_open(struct tty_struct *tty, struct file *filp)
933{
810ab09b 934 struct moxa_board_conf *brd;
8f8ecbad 935 struct moxa_port *ch;
1da177e4
LT
936 int port;
937 int retval;
1da177e4 938
11324edd 939 port = tty->index;
1da177e4
LT
940 if (port == MAX_PORTS) {
941 return (0);
942 }
810ab09b
JS
943 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
944 if (!brd->ready)
945 return -ENODEV;
1da177e4 946
810ab09b 947 ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
1da177e4
LT
948 ch->count++;
949 tty->driver_data = ch;
950 ch->tty = tty;
951 if (!(ch->asyncflags & ASYNC_INITIALIZED)) {
952 ch->statusflags = 0;
db1acaa6 953 moxa_set_tty_param(tty, tty->termios);
b4173f45
JS
954 MoxaPortLineCtrl(ch, 1, 1);
955 MoxaPortEnable(ch);
1da177e4
LT
956 ch->asyncflags |= ASYNC_INITIALIZED;
957 }
6f56b658 958 retval = moxa_block_till_ready(tty, filp, ch);
1da177e4
LT
959
960 moxa_unthrottle(tty);
961
962 if (ch->type == PORT_16550A) {
b4173f45 963 MoxaSetFifo(ch, 1);
1da177e4 964 } else {
b4173f45 965 MoxaSetFifo(ch, 0);
1da177e4
LT
966 }
967
968 return (retval);
969}
970
971static void moxa_close(struct tty_struct *tty, struct file *filp)
972{
8f8ecbad 973 struct moxa_port *ch;
1da177e4
LT
974 int port;
975
11324edd 976 port = tty->index;
1da177e4
LT
977 if (port == MAX_PORTS) {
978 return;
979 }
1da177e4
LT
980 if (tty->driver_data == NULL) {
981 return;
982 }
983 if (tty_hung_up_p(filp)) {
984 return;
985 }
8f8ecbad 986 ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT
987
988 if ((tty->count == 1) && (ch->count != 1)) {
7aeb95da
JS
989 printk(KERN_WARNING "moxa_close: bad serial port count; "
990 "tty->count is 1, ch->count is %d\n", ch->count);
1da177e4
LT
991 ch->count = 1;
992 }
993 if (--ch->count < 0) {
7aeb95da
JS
994 printk(KERN_WARNING "moxa_close: bad serial port count, "
995 "device=%s\n", tty->name);
1da177e4
LT
996 ch->count = 0;
997 }
998 if (ch->count) {
999 return;
1000 }
1001 ch->asyncflags |= ASYNC_CLOSING;
1002
1003 ch->cflag = tty->termios->c_cflag;
1004 if (ch->asyncflags & ASYNC_INITIALIZED) {
6f56b658 1005 moxa_setup_empty_event(tty);
1da177e4 1006 tty_wait_until_sent(tty, 30 * HZ); /* 30 seconds timeout */
b4173f45 1007 del_timer_sync(&ch->emptyTimer);
1da177e4 1008 }
6f56b658 1009 moxa_shut_down(ch);
b4173f45 1010 MoxaPortFlushData(ch, 2);
1da177e4
LT
1011
1012 if (tty->driver->flush_buffer)
1013 tty->driver->flush_buffer(tty);
1014 tty_ldisc_flush(tty);
1015
1016 tty->closing = 0;
1da177e4
LT
1017 ch->tty = NULL;
1018 if (ch->blocked_open) {
1019 if (ch->close_delay) {
1020 msleep_interruptible(jiffies_to_msecs(ch->close_delay));
1021 }
1022 wake_up_interruptible(&ch->open_wait);
1023 }
1024 ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
95e07914 1025 complete_all(&ch->close_wait);
1da177e4
LT
1026}
1027
1028static int moxa_write(struct tty_struct *tty,
1029 const unsigned char *buf, int count)
1030{
b4173f45 1031 struct moxa_port *ch = tty->driver_data;
1da177e4 1032 unsigned long flags;
b4173f45 1033 int len;
1da177e4 1034
1da177e4 1035 if (ch == NULL)
b4173f45 1036 return 0;
33f0f88f
AC
1037
1038 spin_lock_irqsave(&moxa_lock, flags);
b4173f45 1039 len = MoxaPortWriteData(ch, (unsigned char *) buf, count);
33f0f88f 1040 spin_unlock_irqrestore(&moxa_lock, flags);
1da177e4
LT
1041
1042 /*********************************************
1043 if ( !(ch->statusflags & LOWWAIT) &&
1044 ((len != count) || (MoxaPortTxFree(port) <= 100)) )
1045 ************************************************/
1046 ch->statusflags |= LOWWAIT;
1047 return (len);
1048}
1049
1050static int moxa_write_room(struct tty_struct *tty)
1051{
8f8ecbad 1052 struct moxa_port *ch;
1da177e4
LT
1053
1054 if (tty->stopped)
1055 return (0);
b4173f45 1056 ch = tty->driver_data;
1da177e4
LT
1057 if (ch == NULL)
1058 return (0);
b4173f45 1059 return MoxaPortTxFree(ch);
1da177e4
LT
1060}
1061
1062static void moxa_flush_buffer(struct tty_struct *tty)
1063{
b4173f45 1064 struct moxa_port *ch = tty->driver_data;
1da177e4
LT
1065
1066 if (ch == NULL)
1067 return;
b4173f45 1068 MoxaPortFlushData(ch, 1);
1da177e4
LT
1069 tty_wakeup(tty);
1070}
1071
1072static int moxa_chars_in_buffer(struct tty_struct *tty)
1073{
b4173f45 1074 struct moxa_port *ch = tty->driver_data;
1da177e4 1075 int chars;
1da177e4
LT
1076
1077 /*
1078 * Sigh...I have to check if driver_data is NULL here, because
1079 * if an open() fails, the TTY subsystem eventually calls
1080 * tty_wait_until_sent(), which calls the driver's chars_in_buffer()
1081 * routine. And since the open() failed, we return 0 here. TDJ
1082 */
1083 if (ch == NULL)
1084 return (0);
b4173f45 1085 chars = MoxaPortTxQueue(ch);
1da177e4
LT
1086 if (chars) {
1087 /*
1088 * Make it possible to wakeup anything waiting for output
1089 * in tty_ioctl.c, etc.
1090 */
1091 if (!(ch->statusflags & EMPTYWAIT))
6f56b658 1092 moxa_setup_empty_event(tty);
1da177e4
LT
1093 }
1094 return (chars);
1095}
1096
1097static void moxa_flush_chars(struct tty_struct *tty)
1098{
1099 /*
1100 * Don't think I need this, because this is called to empty the TX
1101 * buffer for the 16450, 16550, etc.
1102 */
1103}
1104
1105static void moxa_put_char(struct tty_struct *tty, unsigned char c)
1106{
b4173f45 1107 struct moxa_port *ch = tty->driver_data;
1da177e4
LT
1108 unsigned long flags;
1109
1da177e4
LT
1110 if (ch == NULL)
1111 return;
33f0f88f 1112 spin_lock_irqsave(&moxa_lock, flags);
b4173f45 1113 MoxaPortWriteData(ch, &c, 1);
33f0f88f 1114 spin_unlock_irqrestore(&moxa_lock, flags);
1da177e4
LT
1115 /************************************************
1116 if ( !(ch->statusflags & LOWWAIT) && (MoxaPortTxFree(port) <= 100) )
1117 *************************************************/
1118 ch->statusflags |= LOWWAIT;
1119}
1120
1121static int moxa_tiocmget(struct tty_struct *tty, struct file *file)
1122{
b4173f45 1123 struct moxa_port *ch = tty->driver_data;
1da177e4
LT
1124 int flag = 0, dtr, rts;
1125
b4173f45 1126 if ((tty->index != MAX_PORTS) && (!ch))
1da177e4
LT
1127 return (-EINVAL);
1128
b4173f45 1129 MoxaPortGetLineOut(ch, &dtr, &rts);
1da177e4
LT
1130 if (dtr)
1131 flag |= TIOCM_DTR;
1132 if (rts)
1133 flag |= TIOCM_RTS;
b4173f45 1134 dtr = MoxaPortLineStatus(ch);
1da177e4
LT
1135 if (dtr & 1)
1136 flag |= TIOCM_CTS;
1137 if (dtr & 2)
1138 flag |= TIOCM_DSR;
1139 if (dtr & 4)
1140 flag |= TIOCM_CD;
1141 return flag;
1142}
1143
1144static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
1145 unsigned int set, unsigned int clear)
1146{
b4173f45 1147 struct moxa_port *ch = tty->driver_data;
1da177e4
LT
1148 int port;
1149 int dtr, rts;
1150
11324edd 1151 port = tty->index;
1da177e4
LT
1152 if ((port != MAX_PORTS) && (!ch))
1153 return (-EINVAL);
1154
b4173f45 1155 MoxaPortGetLineOut(ch, &dtr, &rts);
1da177e4
LT
1156 if (set & TIOCM_RTS)
1157 rts = 1;
1158 if (set & TIOCM_DTR)
1159 dtr = 1;
1160 if (clear & TIOCM_RTS)
1161 rts = 0;
1162 if (clear & TIOCM_DTR)
1163 dtr = 0;
b4173f45 1164 MoxaPortLineCtrl(ch, dtr, rts);
1da177e4
LT
1165 return 0;
1166}
1167
1168static int moxa_ioctl(struct tty_struct *tty, struct file *file,
1169 unsigned int cmd, unsigned long arg)
1170{
b4173f45 1171 struct moxa_port *ch = tty->driver_data;
1da177e4
LT
1172 register int port;
1173 void __user *argp = (void __user *)arg;
1174 int retval;
1175
11324edd 1176 port = tty->index;
1da177e4
LT
1177 if ((port != MAX_PORTS) && (!ch))
1178 return (-EINVAL);
1179
1180 switch (cmd) {
1181 case TCSBRK: /* SVID version: non-zero arg --> no break */
1182 retval = tty_check_change(tty);
1183 if (retval)
1184 return (retval);
6f56b658 1185 moxa_setup_empty_event(tty);
1da177e4
LT
1186 tty_wait_until_sent(tty, 0);
1187 if (!arg)
b4173f45 1188 MoxaPortSendBreak(ch, 0);
1da177e4
LT
1189 return (0);
1190 case TCSBRKP: /* support for POSIX tcsendbreak() */
1191 retval = tty_check_change(tty);
1192 if (retval)
1193 return (retval);
6f56b658 1194 moxa_setup_empty_event(tty);
1da177e4 1195 tty_wait_until_sent(tty, 0);
b4173f45 1196 MoxaPortSendBreak(ch, arg);
1da177e4
LT
1197 return (0);
1198 case TIOCGSOFTCAR:
9e9fc313 1199 return put_user(C_CLOCAL(tty) ? 1 : 0, (int __user *)argp);
1da177e4 1200 case TIOCSSOFTCAR:
9e9fc313 1201 if (get_user(retval, (int __user *)argp))
1da177e4
LT
1202 return -EFAULT;
1203 arg = retval;
1204 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) |
1205 (arg ? CLOCAL : 0));
1206 if (C_CLOCAL(tty))
1207 ch->asyncflags &= ~ASYNC_CHECK_CD;
1208 else
1209 ch->asyncflags |= ASYNC_CHECK_CD;
1210 return (0);
1211 case TIOCGSERIAL:
1212 return moxa_get_serial_info(ch, argp);
1213
1214 case TIOCSSERIAL:
1215 return moxa_set_serial_info(ch, argp);
1216 default:
b4173f45 1217 retval = MoxaDriverIoctl(tty, cmd, arg);
1da177e4
LT
1218 }
1219 return (retval);
1220}
1221
1222static void moxa_throttle(struct tty_struct *tty)
1223{
8f8ecbad 1224 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT
1225
1226 ch->statusflags |= THROTTLE;
1227}
1228
1229static void moxa_unthrottle(struct tty_struct *tty)
1230{
8f8ecbad 1231 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT
1232
1233 ch->statusflags &= ~THROTTLE;
1234}
1235
1236static void moxa_set_termios(struct tty_struct *tty,
606d099c 1237 struct ktermios *old_termios)
1da177e4 1238{
8f8ecbad 1239 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT
1240
1241 if (ch == NULL)
1242 return;
db1acaa6 1243 moxa_set_tty_param(tty, old_termios);
1da177e4
LT
1244 if (!(old_termios->c_cflag & CLOCAL) &&
1245 (tty->termios->c_cflag & CLOCAL))
1246 wake_up_interruptible(&ch->open_wait);
1247}
1248
1249static void moxa_stop(struct tty_struct *tty)
1250{
8f8ecbad 1251 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT
1252
1253 if (ch == NULL)
1254 return;
b4173f45 1255 MoxaPortTxDisable(ch);
1da177e4
LT
1256 ch->statusflags |= TXSTOPPED;
1257}
1258
1259
1260static void moxa_start(struct tty_struct *tty)
1261{
8f8ecbad 1262 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT
1263
1264 if (ch == NULL)
1265 return;
1266
1267 if (!(ch->statusflags & TXSTOPPED))
1268 return;
1269
b4173f45 1270 MoxaPortTxEnable(ch);
1da177e4
LT
1271 ch->statusflags &= ~TXSTOPPED;
1272}
1273
1274static void moxa_hangup(struct tty_struct *tty)
1275{
8f8ecbad 1276 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT
1277
1278 moxa_flush_buffer(tty);
6f56b658 1279 moxa_shut_down(ch);
1da177e4
LT
1280 ch->count = 0;
1281 ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE;
1282 ch->tty = NULL;
1283 wake_up_interruptible(&ch->open_wait);
1284}
1285
1286static void moxa_poll(unsigned long ignored)
1287{
8f8ecbad 1288 struct moxa_port *ch;
0bcc4caa
JS
1289 struct tty_struct *tty;
1290 unsigned int card;
1291 int i;
1da177e4 1292
1da177e4
LT
1293 del_timer(&moxaTimer);
1294
1295 if (MoxaDriverPoll() < 0) {
aa7e5221 1296 mod_timer(&moxaTimer, jiffies + HZ / 50);
1da177e4
LT
1297 return;
1298 }
0bcc4caa 1299
1da177e4 1300 for (card = 0; card < MAX_BOARDS; card++) {
0bcc4caa 1301 if (!moxa_boards[card].ready)
1da177e4 1302 continue;
810ab09b 1303 ch = moxa_boards[card].ports;
0bcc4caa 1304 for (i = 0; i < moxa_boards[card].numPorts; i++, ch++) {
1da177e4
LT
1305 if ((ch->asyncflags & ASYNC_INITIALIZED) == 0)
1306 continue;
1307 if (!(ch->statusflags & THROTTLE) &&
b4173f45 1308 (MoxaPortRxQueue(ch) > 0))
6f56b658 1309 moxa_receive_data(ch);
0bcc4caa
JS
1310 tty = ch->tty;
1311 if (tty == NULL)
1da177e4
LT
1312 continue;
1313 if (ch->statusflags & LOWWAIT) {
b4173f45 1314 if (MoxaPortTxQueue(ch) <= WAKEUP_CHARS) {
0bcc4caa 1315 if (!tty->stopped) {
1da177e4 1316 ch->statusflags &= ~LOWWAIT;
0bcc4caa 1317 tty_wakeup(tty);
1da177e4
LT
1318 }
1319 }
1320 }
0bcc4caa
JS
1321 if (!I_IGNBRK(tty) && (MoxaPortResetBrkCnt(ch) > 0)) {
1322 tty_insert_flip_char(tty, 0, TTY_BREAK);
1323 tty_schedule_flip(tty);
1da177e4 1324 }
b4173f45 1325 if (MoxaPortDCDChange(ch)) {
1da177e4 1326 if (ch->asyncflags & ASYNC_CHECK_CD) {
b4173f45 1327 if (MoxaPortDCDON(ch))
1da177e4
LT
1328 wake_up_interruptible(&ch->open_wait);
1329 else {
0bcc4caa 1330 tty_hangup(tty);
ba196df3
JS
1331 wake_up_interruptible(&ch->open_wait);
1332 ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE;
1da177e4
LT
1333 }
1334 }
1335 }
1336 }
1337 }
1338
aa7e5221 1339 mod_timer(&moxaTimer, jiffies + HZ / 50);
1da177e4
LT
1340}
1341
1342/******************************************************************************/
1343
db1acaa6 1344static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4 1345{
606d099c 1346 register struct ktermios *ts;
8f8ecbad 1347 struct moxa_port *ch;
db1acaa6 1348 int rts, cts, txflow, rxflow, xany, baud;
1da177e4 1349
8f8ecbad 1350 ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT
1351 ts = tty->termios;
1352 if (ts->c_cflag & CLOCAL)
1353 ch->asyncflags &= ~ASYNC_CHECK_CD;
1354 else
1355 ch->asyncflags |= ASYNC_CHECK_CD;
1356 rts = cts = txflow = rxflow = xany = 0;
1357 if (ts->c_cflag & CRTSCTS)
1358 rts = cts = 1;
1359 if (ts->c_iflag & IXON)
1360 txflow = 1;
1361 if (ts->c_iflag & IXOFF)
1362 rxflow = 1;
1363 if (ts->c_iflag & IXANY)
1364 xany = 1;
db1acaa6
AC
1365
1366 /* Clear the features we don't support */
1367 ts->c_cflag &= ~CMSPAR;
b4173f45
JS
1368 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1369 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
db1acaa6
AC
1370 if (baud == -1)
1371 baud = tty_termios_baud_rate(old_termios);
1372 /* Not put the baud rate into the termios data */
1373 tty_encode_baud_rate(tty, baud, baud);
1da177e4
LT
1374}
1375
6f56b658 1376static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,
8f8ecbad 1377 struct moxa_port *ch)
1da177e4
LT
1378{
1379 DECLARE_WAITQUEUE(wait,current);
1380 unsigned long flags;
1381 int retval;
1382 int do_clocal = C_CLOCAL(tty);
1383
1384 /*
1385 * If the device is in the middle of being closed, then block
1386 * until it's done, and then try again.
1387 */
1388 if (tty_hung_up_p(filp) || (ch->asyncflags & ASYNC_CLOSING)) {
1389 if (ch->asyncflags & ASYNC_CLOSING)
95e07914 1390 wait_for_completion_interruptible(&ch->close_wait);
1da177e4
LT
1391#ifdef SERIAL_DO_RESTART
1392 if (ch->asyncflags & ASYNC_HUP_NOTIFY)
1393 return (-EAGAIN);
1394 else
1395 return (-ERESTARTSYS);
1396#else
1397 return (-EAGAIN);
1398#endif
1399 }
1400 /*
1401 * If non-blocking mode is set, then make the check up front
1402 * and then exit.
1403 */
1404 if (filp->f_flags & O_NONBLOCK) {
1405 ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
1406 return (0);
1407 }
1408 /*
1409 * Block waiting for the carrier detect and the line to become free
1410 */
1411 retval = 0;
1412 add_wait_queue(&ch->open_wait, &wait);
7aeb95da 1413 pr_debug("block_til_ready before block: ttys%d, count = %d\n",
b4173f45 1414 tty->index, ch->count);
33f0f88f 1415 spin_lock_irqsave(&moxa_lock, flags);
1da177e4
LT
1416 if (!tty_hung_up_p(filp))
1417 ch->count--;
1da177e4 1418 ch->blocked_open++;
33f0f88f
AC
1419 spin_unlock_irqrestore(&moxa_lock, flags);
1420
1da177e4
LT
1421 while (1) {
1422 set_current_state(TASK_INTERRUPTIBLE);
1423 if (tty_hung_up_p(filp) ||
1424 !(ch->asyncflags & ASYNC_INITIALIZED)) {
1425#ifdef SERIAL_DO_RESTART
1426 if (ch->asyncflags & ASYNC_HUP_NOTIFY)
1427 retval = -EAGAIN;
1428 else
1429 retval = -ERESTARTSYS;
1430#else
1431 retval = -EAGAIN;
1432#endif
1433 break;
1434 }
1435 if (!(ch->asyncflags & ASYNC_CLOSING) && (do_clocal ||
b4173f45 1436 MoxaPortDCDON(ch)))
1da177e4
LT
1437 break;
1438
1439 if (signal_pending(current)) {
1440 retval = -ERESTARTSYS;
1441 break;
1442 }
1443 schedule();
1444 }
1445 set_current_state(TASK_RUNNING);
1446 remove_wait_queue(&ch->open_wait, &wait);
33f0f88f
AC
1447
1448 spin_lock_irqsave(&moxa_lock, flags);
1da177e4
LT
1449 if (!tty_hung_up_p(filp))
1450 ch->count++;
1451 ch->blocked_open--;
33f0f88f 1452 spin_unlock_irqrestore(&moxa_lock, flags);
7aeb95da 1453 pr_debug("block_til_ready after blocking: ttys%d, count = %d\n",
b4173f45 1454 tty->index, ch->count);
1da177e4
LT
1455 if (retval)
1456 return (retval);
33f0f88f 1457 /* FIXME: review to see if we need to use set_bit on these */
1da177e4 1458 ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
33f0f88f 1459 return 0;
1da177e4
LT
1460}
1461
6f56b658 1462static void moxa_setup_empty_event(struct tty_struct *tty)
1da177e4 1463{
8f8ecbad 1464 struct moxa_port *ch = tty->driver_data;
1da177e4
LT
1465 unsigned long flags;
1466
33f0f88f 1467 spin_lock_irqsave(&moxa_lock, flags);
1da177e4 1468 ch->statusflags |= EMPTYWAIT;
b4173f45 1469 mod_timer(&ch->emptyTimer, jiffies + HZ);
33f0f88f 1470 spin_unlock_irqrestore(&moxa_lock, flags);
1da177e4
LT
1471}
1472
6f56b658 1473static void moxa_check_xmit_empty(unsigned long data)
1da177e4 1474{
8f8ecbad 1475 struct moxa_port *ch;
1da177e4 1476
8f8ecbad 1477 ch = (struct moxa_port *) data;
1da177e4 1478 if (ch->tty && (ch->statusflags & EMPTYWAIT)) {
b4173f45 1479 if (MoxaPortTxQueue(ch) == 0) {
1da177e4
LT
1480 ch->statusflags &= ~EMPTYWAIT;
1481 tty_wakeup(ch->tty);
1482 return;
1483 }
b4173f45 1484 mod_timer(&ch->emptyTimer, round_jiffies(jiffies + HZ));
1da177e4
LT
1485 } else
1486 ch->statusflags &= ~EMPTYWAIT;
1487}
1488
6f56b658 1489static void moxa_shut_down(struct moxa_port *ch)
1da177e4
LT
1490{
1491 struct tty_struct *tp;
1492
1493 if (!(ch->asyncflags & ASYNC_INITIALIZED))
1494 return;
1495
1496 tp = ch->tty;
1497
b4173f45 1498 MoxaPortDisable(ch);
1da177e4
LT
1499
1500 /*
1501 * If we're a modem control device and HUPCL is on, drop RTS & DTR.
1502 */
1503 if (tp->termios->c_cflag & HUPCL)
b4173f45 1504 MoxaPortLineCtrl(ch, 0, 0);
1da177e4
LT
1505
1506 ch->asyncflags &= ~ASYNC_INITIALIZED;
1507}
1508
6f56b658 1509static void moxa_receive_data(struct moxa_port *ch)
1da177e4
LT
1510{
1511 struct tty_struct *tp;
606d099c 1512 struct ktermios *ts;
1da177e4
LT
1513 unsigned long flags;
1514
1515 ts = NULL;
1516 tp = ch->tty;
1517 if (tp)
1518 ts = tp->termios;
1519 /**************************************************
03718234
JS
1520 if ( !tp || !ts || !(ts->c_cflag & CREAD) ) {
1521 *****************************************************/
1522 if (!tp || !ts) {
b4173f45 1523 MoxaPortFlushData(ch, 0);
03718234
JS
1524 return;
1525 }
1526 spin_lock_irqsave(&moxa_lock, flags);
b4173f45 1527 MoxaPortReadData(ch, tp);
03718234
JS
1528 spin_unlock_irqrestore(&moxa_lock, flags);
1529 tty_schedule_flip(tp);
1530}
1da177e4
LT
1531
1532/*
1533 * Query
1534 */
1da177e4
LT
1535
1536struct mon_str {
1537 int tick;
1538 int rxcnt[MAX_PORTS];
1539 int txcnt[MAX_PORTS];
1540};
1da177e4
LT
1541
1542#define DCD_changed 0x01
1543#define DCD_oldstate 0x80
1544
1da177e4 1545static int moxaLowWaterChk;
9dff89cd 1546static struct mon_str moxaLog;
9fa372a8 1547static int moxaFuncTout = HZ / 2;
1da177e4 1548
1da177e4 1549static void moxafunc(void __iomem *, int, ushort);
6f56b658
JS
1550static void moxa_wait_finish(void __iomem *);
1551static void moxa_low_water_check(void __iomem *);
1da177e4
LT
1552
1553/*****************************************************************************
1554 * Driver level functions: *
1da177e4
LT
1555 * 2. MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port); *
1556 * 3. MoxaDriverPoll(void); *
1557 *****************************************************************************/
1da177e4
LT
1558#define MOXA 0x400
1559#define MOXA_GET_IQUEUE (MOXA + 1) /* get input buffered count */
1560#define MOXA_GET_OQUEUE (MOXA + 2) /* get output buffered count */
1da177e4
LT
1561#define MOXA_GETDATACOUNT (MOXA + 23)
1562#define MOXA_GET_IOQUEUE (MOXA + 27)
1563#define MOXA_FLUSH_QUEUE (MOXA + 28)
1564#define MOXA_GET_CONF (MOXA + 35) /* configuration */
1565#define MOXA_GET_MAJOR (MOXA + 63)
1566#define MOXA_GET_CUMAJOR (MOXA + 64)
1567#define MOXA_GETMSTATUS (MOXA + 65)
1568
b4173f45 1569static void MoxaPortFlushData(struct moxa_port *port, int mode)
1da177e4
LT
1570{
1571 void __iomem *ofsAddr;
1572 if ((mode < 0) || (mode > 2))
1573 return;
b4173f45 1574 ofsAddr = port->tableAddr;
1da177e4
LT
1575 moxafunc(ofsAddr, FC_FlushQueue, mode);
1576 if (mode != 1) {
b4173f45 1577 port->lowChkFlag = 0;
6f56b658 1578 moxa_low_water_check(ofsAddr);
1da177e4
LT
1579 }
1580}
1581
b4173f45
JS
1582static int MoxaDriverIoctl(struct tty_struct *tty, unsigned int cmd,
1583 unsigned long arg)
1da177e4 1584{
b4173f45 1585 struct moxa_port *port = tty->driver_data;
1da177e4
LT
1586 int i;
1587 int status;
1da177e4
LT
1588 void __user *argp = (void __user *)arg;
1589
b4173f45 1590 if (tty->index == MAX_PORTS) {
03718234
JS
1591 if ((cmd != MOXA_GET_CONF) && (cmd != MOXA_GETDATACOUNT) &&
1592 (cmd != MOXA_GET_IOQUEUE) && (cmd != MOXA_GET_MAJOR) &&
1da177e4
LT
1593 (cmd != MOXA_GET_CUMAJOR) && (cmd != MOXA_GETMSTATUS))
1594 return (-EINVAL);
1595 }
1596 switch (cmd) {
1da177e4
LT
1597 case MOXA_GETDATACOUNT:
1598 moxaLog.tick = jiffies;
9dff89cd 1599 if(copy_to_user(argp, &moxaLog, sizeof(struct mon_str)))
1da177e4
LT
1600 return -EFAULT;
1601 return (0);
1602 case MOXA_FLUSH_QUEUE:
1603 MoxaPortFlushData(port, arg);
1604 return (0);
8f8ecbad
JS
1605 case MOXA_GET_IOQUEUE: {
1606 struct moxaq_str __user *argm = argp;
181d6f4f 1607 struct moxaq_str tmp;
810ab09b
JS
1608 struct moxa_port *p;
1609 unsigned int j;
1610
1611 for (i = 0; i < MAX_BOARDS; i++) {
1612 p = moxa_boards[i].ports;
1613 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
1614 memset(&tmp, 0, sizeof(tmp));
1615 if (moxa_boards[i].ready) {
1616 tmp.inq = MoxaPortRxQueue(p);
1617 tmp.outq = MoxaPortTxQueue(p);
1618 }
1619 if (copy_to_user(argm, &tmp, sizeof(tmp)))
1620 return -EFAULT;
1da177e4
LT
1621 }
1622 }
810ab09b 1623 return 0;
8f8ecbad 1624 } case MOXA_GET_OQUEUE:
1da177e4
LT
1625 i = MoxaPortTxQueue(port);
1626 return put_user(i, (unsigned long __user *)argp);
1627 case MOXA_GET_IQUEUE:
1628 i = MoxaPortRxQueue(port);
1629 return put_user(i, (unsigned long __user *)argp);
1630 case MOXA_GET_MAJOR:
1631 if(copy_to_user(argp, &ttymajor, sizeof(int)))
1632 return -EFAULT;
1633 return 0;
1634 case MOXA_GET_CUMAJOR:
1635 i = 0;
1636 if(copy_to_user(argp, &i, sizeof(int)))
1637 return -EFAULT;
1638 return 0;
8f8ecbad
JS
1639 case MOXA_GETMSTATUS: {
1640 struct mxser_mstatus __user *argm = argp;
181d6f4f 1641 struct mxser_mstatus tmp;
8f8ecbad 1642 struct moxa_port *p;
810ab09b
JS
1643 unsigned int j;
1644
1645 for (i = 0; i < MAX_BOARDS; i++) {
1646 p = moxa_boards[i].ports;
1647 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
1648 memset(&tmp, 0, sizeof(tmp));
1649 if (!moxa_boards[i].ready)
1650 goto copy;
8f8ecbad 1651
b4173f45 1652 status = MoxaPortLineStatus(p);
1da177e4 1653 if (status & 1)
181d6f4f 1654 tmp.cts = 1;
1da177e4 1655 if (status & 2)
181d6f4f 1656 tmp.dsr = 1;
1da177e4 1657 if (status & 4)
181d6f4f 1658 tmp.dcd = 1;
1da177e4 1659
810ab09b
JS
1660 if (!p->tty || !p->tty->termios)
1661 tmp.cflag = p->cflag;
1662 else
1663 tmp.cflag = p->tty->termios->c_cflag;
8f8ecbad 1664copy:
810ab09b
JS
1665 if (copy_to_user(argm, &tmp, sizeof(tmp)))
1666 return -EFAULT;
1667 }
1da177e4 1668 }
1da177e4 1669 return 0;
1da177e4 1670 }
1da177e4 1671 }
03718234
JS
1672
1673 return -ENOIOCTLCMD;
1da177e4
LT
1674}
1675
0bcc4caa 1676static int MoxaDriverPoll(void)
1da177e4 1677{
8f8ecbad 1678 struct moxa_board_conf *brd;
810ab09b 1679 struct moxa_port *p;
1da177e4
LT
1680 void __iomem *ofsAddr;
1681 void __iomem *ip;
0bcc4caa
JS
1682 unsigned int port, ports, card;
1683 ushort temp;
1da177e4 1684
1da177e4 1685 for (card = 0; card < MAX_BOARDS; card++) {
8f8ecbad 1686 brd = &moxa_boards[card];
810ab09b 1687 if (brd->ready == 0)
01cfaf0d 1688 continue;
8f8ecbad 1689 if ((ports = brd->numPorts) == 0)
1da177e4 1690 continue;
8f8ecbad
JS
1691 if (readb(brd->intPend) == 0xff) {
1692 ip = brd->intTable + readb(brd->intNdx);
810ab09b 1693 p = brd->ports;
1da177e4
LT
1694 ports <<= 1;
1695 for (port = 0; port < ports; port += 2, p++) {
810ab09b
JS
1696 temp = readw(ip + port);
1697 if (temp == 0)
1698 continue;
1699
1700 writew(0, ip + port);
1701 ofsAddr = p->tableAddr;
1702 if (temp & IntrTx)
1703 writew(readw(ofsAddr + HostStat) &
1704 ~WakeupTx, ofsAddr + HostStat);
1705 if (temp & IntrBreak)
1706 p->breakCnt++;
1707
1708 if (temp & IntrLine) {
1709 if (readb(ofsAddr + FlagStat) & DCD_state) {
1710 if ((p->DCDState & DCD_oldstate) == 0)
1711 p->DCDState = (DCD_oldstate |
1712 DCD_changed);
1713 } else {
1714 if (p->DCDState & DCD_oldstate)
1715 p->DCDState = DCD_changed;
1da177e4
LT
1716 }
1717 }
1718 }
8f8ecbad 1719 writeb(0, brd->intPend);
1da177e4
LT
1720 }
1721 if (moxaLowWaterChk) {
810ab09b 1722 p = brd->ports;
1da177e4 1723 for (port = 0; port < ports; port++, p++) {
810ab09b
JS
1724 if (p->lowChkFlag) {
1725 p->lowChkFlag = 0;
1726 ofsAddr = p->tableAddr;
6f56b658 1727 moxa_low_water_check(ofsAddr);
1da177e4
LT
1728 }
1729 }
1730 }
1731 }
1732 moxaLowWaterChk = 0;
1da177e4 1733
0bcc4caa 1734 return 0;
1da177e4
LT
1735}
1736
1737/*****************************************************************************
1738 * Port level functions: *
1da177e4
LT
1739 * 2. MoxaPortEnable(int port); *
1740 * 3. MoxaPortDisable(int port); *
1741 * 4. MoxaPortGetMaxBaud(int port); *
1da177e4 1742 * 6. MoxaPortSetBaud(int port, long baud); *
1da177e4
LT
1743 * 8. MoxaPortSetTermio(int port, unsigned char *termio); *
1744 * 9. MoxaPortGetLineOut(int port, int *dtrState, int *rtsState); *
1745 * 10. MoxaPortLineCtrl(int port, int dtrState, int rtsState); *
1746 * 11. MoxaPortFlowCtrl(int port, int rts, int cts, int rx, int tx,int xany); *
1747 * 12. MoxaPortLineStatus(int port); *
1748 * 13. MoxaPortDCDChange(int port); *
1749 * 14. MoxaPortDCDON(int port); *
1750 * 15. MoxaPortFlushData(int port, int mode); *
1751 * 16. MoxaPortWriteData(int port, unsigned char * buffer, int length); *
33f0f88f 1752 * 17. MoxaPortReadData(int port, struct tty_struct *tty); *
1da177e4
LT
1753 * 20. MoxaPortTxQueue(int port); *
1754 * 21. MoxaPortTxFree(int port); *
1755 * 22. MoxaPortRxQueue(int port); *
1da177e4
LT
1756 * 24. MoxaPortTxDisable(int port); *
1757 * 25. MoxaPortTxEnable(int port); *
1da177e4 1758 * 27. MoxaPortResetBrkCnt(int port); *
1da177e4
LT
1759 * 30. MoxaPortSendBreak(int port, int ticks); *
1760 *****************************************************************************/
1761/*
1762 * Moxa Port Number Description:
1763 *
1764 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1765 * the port number using in MOXA driver functions will be 0 to 31 for
1766 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1767 * to 127 for fourth. For example, if you setup three MOXA boards,
1768 * first board is C218, second board is C320-16 and third board is
1769 * C320-32. The port number of first board (C218 - 8 ports) is from
1770 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1771 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1772 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1773 * 127 will be invalid.
1774 *
1775 *
1776 * Moxa Functions Description:
1777 *
1778 * Function 1: Driver initialization routine, this routine must be
1779 * called when initialized driver.
1780 * Syntax:
1781 * void MoxaDriverInit();
1782 *
1783 *
1784 * Function 2: Moxa driver private IOCTL command processing.
1785 * Syntax:
1786 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1787 *
1788 * unsigned int cmd : IOCTL command
1789 * unsigned long arg : IOCTL argument
1790 * int port : port number (0 - 127)
1791 *
1792 * return: 0 (OK)
1793 * -EINVAL
1794 * -ENOIOCTLCMD
1795 *
1796 *
1797 * Function 3: Moxa driver polling process routine.
1798 * Syntax:
1799 * int MoxaDriverPoll(void);
1800 *
1801 * return: 0 ; polling O.K.
1802 * -1 : no any Moxa card.
1803 *
1804 *
1da177e4
LT
1805 * Function 6: Enable this port to start Tx/Rx data.
1806 * Syntax:
1807 * void MoxaPortEnable(int port);
1808 * int port : port number (0 - 127)
1809 *
1810 *
1811 * Function 7: Disable this port
1812 * Syntax:
1813 * void MoxaPortDisable(int port);
1814 * int port : port number (0 - 127)
1815 *
1816 *
1817 * Function 8: Get the maximun available baud rate of this port.
1818 * Syntax:
1819 * long MoxaPortGetMaxBaud(int port);
1820 * int port : port number (0 - 127)
1821 *
1822 * return: 0 : this port is invalid
1823 * 38400/57600/115200 bps
1824 *
1825 *
1da177e4
LT
1826 * Function 10: Setting baud rate of this port.
1827 * Syntax:
1828 * long MoxaPortSetBaud(int port, long baud);
1829 * int port : port number (0 - 127)
1830 * long baud : baud rate (50 - 115200)
1831 *
1832 * return: 0 : this port is invalid or baud < 50
1833 * 50 - 115200 : the real baud rate set to the port, if
1834 * the argument baud is large than maximun
1835 * available baud rate, the real setting
1836 * baud rate will be the maximun baud rate.
1837 *
1838 *
1da177e4
LT
1839 * Function 12: Configure the port.
1840 * Syntax:
606d099c 1841 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1da177e4 1842 * int port : port number (0 - 127)
606d099c 1843 * struct ktermios * termio : termio structure pointer
c7bce309 1844 * speed_t baud : baud rate
1da177e4
LT
1845 *
1846 * return: -1 : this port is invalid or termio == NULL
1847 * 0 : setting O.K.
1848 *
1849 *
1850 * Function 13: Get the DTR/RTS state of this port.
1851 * Syntax:
1852 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1853 * int port : port number (0 - 127)
1854 * int * dtrState : pointer to INT to receive the current DTR
1855 * state. (if NULL, this function will not
1856 * write to this address)
1857 * int * rtsState : pointer to INT to receive the current RTS
1858 * state. (if NULL, this function will not
1859 * write to this address)
1860 *
1861 * return: -1 : this port is invalid
1862 * 0 : O.K.
1863 *
1864 *
1865 * Function 14: Setting the DTR/RTS output state of this port.
1866 * Syntax:
1867 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1868 * int port : port number (0 - 127)
1869 * int dtrState : DTR output state (0: off, 1: on)
1870 * int rtsState : RTS output state (0: off, 1: on)
1871 *
1872 *
1873 * Function 15: Setting the flow control of this port.
1874 * Syntax:
1875 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1876 * int txFlow,int xany);
1877 * int port : port number (0 - 127)
1878 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1879 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1880 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1881 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1882 * int xany : S/W XANY flow control (0: no, 1: yes)
1883 *
1884 *
1885 * Function 16: Get ths line status of this port
1886 * Syntax:
1887 * int MoxaPortLineStatus(int port);
1888 * int port : port number (0 - 127)
1889 *
1890 * return: Bit 0 - CTS state (0: off, 1: on)
1891 * Bit 1 - DSR state (0: off, 1: on)
1892 * Bit 2 - DCD state (0: off, 1: on)
1893 *
1894 *
1895 * Function 17: Check the DCD state has changed since the last read
1896 * of this function.
1897 * Syntax:
1898 * int MoxaPortDCDChange(int port);
1899 * int port : port number (0 - 127)
1900 *
1901 * return: 0 : no changed
1902 * 1 : DCD has changed
1903 *
1904 *
1905 * Function 18: Check ths current DCD state is ON or not.
1906 * Syntax:
1907 * int MoxaPortDCDON(int port);
1908 * int port : port number (0 - 127)
1909 *
1910 * return: 0 : DCD off
1911 * 1 : DCD on
1912 *
1913 *
1914 * Function 19: Flush the Rx/Tx buffer data of this port.
1915 * Syntax:
1916 * void MoxaPortFlushData(int port, int mode);
1917 * int port : port number (0 - 127)
1918 * int mode
1919 * 0 : flush the Rx buffer
1920 * 1 : flush the Tx buffer
1921 * 2 : flush the Rx and Tx buffer
1922 *
1923 *
1924 * Function 20: Write data.
1925 * Syntax:
1926 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1927 * int port : port number (0 - 127)
1928 * unsigned char * buffer : pointer to write data buffer.
1929 * int length : write data length
1930 *
1931 * return: 0 - length : real write data length
1932 *
1933 *
1934 * Function 21: Read data.
1935 * Syntax:
33f0f88f 1936 * int MoxaPortReadData(int port, struct tty_struct *tty);
1da177e4 1937 * int port : port number (0 - 127)
33f0f88f 1938 * struct tty_struct *tty : tty for data
1da177e4
LT
1939 *
1940 * return: 0 - length : real read data length
1941 *
1942 *
1da177e4
LT
1943 * Function 24: Get the Tx buffer current queued data bytes
1944 * Syntax:
1945 * int MoxaPortTxQueue(int port);
1946 * int port : port number (0 - 127)
1947 *
1948 * return: .. : Tx buffer current queued data bytes
1949 *
1950 *
1951 * Function 25: Get the Tx buffer current free space
1952 * Syntax:
1953 * int MoxaPortTxFree(int port);
1954 * int port : port number (0 - 127)
1955 *
1956 * return: .. : Tx buffer current free space
1957 *
1958 *
1959 * Function 26: Get the Rx buffer current queued data bytes
1960 * Syntax:
1961 * int MoxaPortRxQueue(int port);
1962 * int port : port number (0 - 127)
1963 *
1964 * return: .. : Rx buffer current queued data bytes
1965 *
1966 *
1da177e4
LT
1967 * Function 28: Disable port data transmission.
1968 * Syntax:
1969 * void MoxaPortTxDisable(int port);
1970 * int port : port number (0 - 127)
1971 *
1972 *
1973 * Function 29: Enable port data transmission.
1974 * Syntax:
1975 * void MoxaPortTxEnable(int port);
1976 * int port : port number (0 - 127)
1977 *
1978 *
1da177e4
LT
1979 * Function 31: Get the received BREAK signal count and reset it.
1980 * Syntax:
1981 * int MoxaPortResetBrkCnt(int port);
1982 * int port : port number (0 - 127)
1983 *
1984 * return: 0 - .. : BREAK signal count
1985 *
1986 *
1da177e4
LT
1987 * Function 34: Send out a BREAK signal.
1988 * Syntax:
1989 * void MoxaPortSendBreak(int port, int ms100);
1990 * int port : port number (0 - 127)
1991 * int ms100 : break signal time interval.
1992 * unit: 100 mini-second. if ms100 == 0, it will
1993 * send out a about 250 ms BREAK signal.
1994 *
1995 */
1da177e4 1996
b4173f45 1997static void MoxaPortEnable(struct moxa_port *port)
1da177e4
LT
1998{
1999 void __iomem *ofsAddr;
1da177e4
LT
2000 short lowwater = 512;
2001
b4173f45 2002 ofsAddr = port->tableAddr;
1da177e4 2003 writew(lowwater, ofsAddr + Low_water);
b4173f45
JS
2004 port->breakCnt = 0;
2005 if (port->board->boardType == MOXA_BOARD_C320_ISA ||
2006 port->board->boardType == MOXA_BOARD_C320_PCI) {
1da177e4
LT
2007 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
2008 } else {
2009 writew(readw(ofsAddr + HostStat) | WakeupBreak, ofsAddr + HostStat);
2010 }
2011
2012 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
2013 moxafunc(ofsAddr, FC_FlushQueue, 2);
2014
2015 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
2016 MoxaPortLineStatus(port);
2017}
2018
b4173f45 2019static void MoxaPortDisable(struct moxa_port *port)
1da177e4 2020{
b4173f45 2021 void __iomem *ofsAddr = port->tableAddr;
1da177e4
LT
2022
2023 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
2024 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
2025 writew(0, ofsAddr + HostStat);
2026 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
2027}
2028
b4173f45 2029static long MoxaPortGetMaxBaud(struct moxa_port *port)
1da177e4 2030{
b4173f45
JS
2031 if (port->board->boardType == MOXA_BOARD_C320_ISA ||
2032 port->board->boardType == MOXA_BOARD_C320_PCI)
1da177e4
LT
2033 return (460800L);
2034 else
2035 return (921600L);
2036}
2037
2038
b4173f45 2039static long MoxaPortSetBaud(struct moxa_port *port, long baud)
1da177e4
LT
2040{
2041 void __iomem *ofsAddr;
2042 long max, clock;
2043 unsigned int val;
2044
2045 if ((baud < 50L) || ((max = MoxaPortGetMaxBaud(port)) == 0))
2046 return (0);
b4173f45 2047 ofsAddr = port->tableAddr;
1da177e4
LT
2048 if (baud > max)
2049 baud = max;
2050 if (max == 38400L)
2051 clock = 614400L; /* for 9.8304 Mhz : max. 38400 bps */
2052 else if (max == 57600L)
2053 clock = 691200L; /* for 11.0592 Mhz : max. 57600 bps */
2054 else
2055 clock = 921600L; /* for 14.7456 Mhz : max. 115200 bps */
2056 val = clock / baud;
2057 moxafunc(ofsAddr, FC_SetBaud, val);
2058 baud = clock / val;
1da177e4
LT
2059 return (baud);
2060}
2061
b4173f45
JS
2062static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
2063 speed_t baud)
1da177e4
LT
2064{
2065 void __iomem *ofsAddr;
2066 tcflag_t cflag;
1da177e4
LT
2067 tcflag_t mode = 0;
2068
b4173f45 2069 ofsAddr = port->tableAddr;
1da177e4
LT
2070 cflag = termio->c_cflag; /* termio->c_cflag */
2071
2072 mode = termio->c_cflag & CSIZE;
2073 if (mode == CS5)
2074 mode = MX_CS5;
2075 else if (mode == CS6)
2076 mode = MX_CS6;
2077 else if (mode == CS7)
2078 mode = MX_CS7;
2079 else if (mode == CS8)
2080 mode = MX_CS8;
2081
2082 if (termio->c_cflag & CSTOPB) {
2083 if (mode == MX_CS5)
2084 mode |= MX_STOP15;
2085 else
2086 mode |= MX_STOP2;
2087 } else
2088 mode |= MX_STOP1;
2089
2090 if (termio->c_cflag & PARENB) {
2091 if (termio->c_cflag & PARODD)
2092 mode |= MX_PARODD;
2093 else
2094 mode |= MX_PAREVEN;
2095 } else
2096 mode |= MX_PARNONE;
2097
2098 moxafunc(ofsAddr, FC_SetDataMode, (ushort) mode);
2099
b4173f45
JS
2100 if (port->board->boardType == MOXA_BOARD_C320_ISA ||
2101 port->board->boardType == MOXA_BOARD_C320_PCI) {
c7bce309 2102 if (baud >= 921600L)
1da177e4
LT
2103 return (-1);
2104 }
db1acaa6 2105 baud = MoxaPortSetBaud(port, baud);
1da177e4
LT
2106
2107 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
2108 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
2109 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
2110 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
6f56b658 2111 moxa_wait_finish(ofsAddr);
1da177e4
LT
2112
2113 }
db1acaa6 2114 return (baud);
1da177e4
LT
2115}
2116
b4173f45
JS
2117static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
2118 int *rtsState)
1da177e4
LT
2119{
2120
b4173f45
JS
2121 if (dtrState)
2122 *dtrState = !!(port->lineCtrl & DTR_ON);
2123 if (rtsState)
2124 *rtsState = !!(port->lineCtrl & RTS_ON);
2125
1da177e4
LT
2126 return (0);
2127}
2128
b4173f45 2129static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
1da177e4 2130{
b4173f45 2131 int mode = 0;
1da177e4 2132
1da177e4
LT
2133 if (dtr)
2134 mode |= DTR_ON;
2135 if (rts)
2136 mode |= RTS_ON;
b4173f45
JS
2137 port->lineCtrl = mode;
2138 moxafunc(port->tableAddr, FC_LineControl, mode);
1da177e4
LT
2139}
2140
b4173f45
JS
2141static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
2142 int txflow, int rxflow, int txany)
1da177e4 2143{
b4173f45 2144 int mode = 0;
1da177e4 2145
1da177e4
LT
2146 if (rts)
2147 mode |= RTS_FlowCtl;
2148 if (cts)
2149 mode |= CTS_FlowCtl;
2150 if (txflow)
2151 mode |= Tx_FlowCtl;
2152 if (rxflow)
2153 mode |= Rx_FlowCtl;
2154 if (txany)
2155 mode |= IXM_IXANY;
b4173f45 2156 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
1da177e4
LT
2157}
2158
b4173f45 2159static int MoxaPortLineStatus(struct moxa_port *port)
1da177e4
LT
2160{
2161 void __iomem *ofsAddr;
2162 int val;
2163
b4173f45
JS
2164 ofsAddr = port->tableAddr;
2165 if (port->board->boardType == MOXA_BOARD_C320_ISA ||
2166 port->board->boardType == MOXA_BOARD_C320_PCI) {
1da177e4
LT
2167 moxafunc(ofsAddr, FC_LineStatus, 0);
2168 val = readw(ofsAddr + FuncArg);
2169 } else {
2170 val = readw(ofsAddr + FlagStat) >> 4;
2171 }
2172 val &= 0x0B;
2173 if (val & 8) {
2174 val |= 4;
b4173f45
JS
2175 if ((port->DCDState & DCD_oldstate) == 0)
2176 port->DCDState = (DCD_oldstate | DCD_changed);
1da177e4 2177 } else {
b4173f45
JS
2178 if (port->DCDState & DCD_oldstate)
2179 port->DCDState = DCD_changed;
1da177e4
LT
2180 }
2181 val &= 7;
2182 return (val);
2183}
2184
b4173f45 2185static int MoxaPortDCDChange(struct moxa_port *port)
1da177e4
LT
2186{
2187 int n;
2188
b4173f45
JS
2189 n = port->DCDState;
2190 port->DCDState &= ~DCD_changed;
1da177e4
LT
2191 n &= DCD_changed;
2192 return (n);
2193}
2194
b4173f45 2195static int MoxaPortDCDON(struct moxa_port *port)
1da177e4
LT
2196{
2197 int n;
2198
b4173f45 2199 if (port->DCDState & DCD_oldstate)
1da177e4
LT
2200 n = 1;
2201 else
2202 n = 0;
2203 return (n);
2204}
2205
b4173f45
JS
2206static int MoxaPortWriteData(struct moxa_port *port, unsigned char *buffer,
2207 int len)
1da177e4
LT
2208{
2209 int c, total, i;
2210 ushort tail;
2211 int cnt;
2212 ushort head, tx_mask, spage, epage;
2213 ushort pageno, pageofs, bufhead;
2214 void __iomem *baseAddr, *ofsAddr, *ofs;
2215
b4173f45
JS
2216 ofsAddr = port->tableAddr;
2217 baseAddr = port->board->basemem;
1da177e4
LT
2218 tx_mask = readw(ofsAddr + TX_mask);
2219 spage = readw(ofsAddr + Page_txb);
2220 epage = readw(ofsAddr + EndPage_txb);
2221 tail = readw(ofsAddr + TXwptr);
2222 head = readw(ofsAddr + TXrptr);
2223 c = (head > tail) ? (head - tail - 1)
2224 : (head - tail + tx_mask);
2225 if (c > len)
2226 c = len;
b4173f45 2227 moxaLog.txcnt[port->tty->index] += c;
1da177e4
LT
2228 total = c;
2229 if (spage == epage) {
2230 bufhead = readw(ofsAddr + Ofs_txb);
2231 writew(spage, baseAddr + Control_reg);
2232 while (c > 0) {
2233 if (head > tail)
2234 len = head - tail - 1;
2235 else
2236 len = tx_mask + 1 - tail;
2237 len = (c > len) ? len : c;
2238 ofs = baseAddr + DynPage_addr + bufhead + tail;
2239 for (i = 0; i < len; i++)
2240 writeb(*buffer++, ofs + i);
2241 tail = (tail + len) & tx_mask;
2242 c -= len;
2243 }
2244 writew(tail, ofsAddr + TXwptr);
2245 } else {
2246 len = c;
2247 pageno = spage + (tail >> 13);
2248 pageofs = tail & Page_mask;
2249 do {
2250 cnt = Page_size - pageofs;
2251 if (cnt > c)
2252 cnt = c;
2253 c -= cnt;
2254 writeb(pageno, baseAddr + Control_reg);
2255 ofs = baseAddr + DynPage_addr + pageofs;
2256 for (i = 0; i < cnt; i++)
2257 writeb(*buffer++, ofs + i);
2258 if (c == 0) {
2259 writew((tail + len) & tx_mask, ofsAddr + TXwptr);
2260 break;
2261 }
2262 if (++pageno == epage)
2263 pageno = spage;
2264 pageofs = 0;
2265 } while (1);
2266 }
2267 writeb(1, ofsAddr + CD180TXirq); /* start to send */
2268 return (total);
2269}
2270
b4173f45 2271static int MoxaPortReadData(struct moxa_port *port, struct tty_struct *tty)
1da177e4
LT
2272{
2273 register ushort head, pageofs;
2274 int i, count, cnt, len, total, remain;
2275 ushort tail, rx_mask, spage, epage;
2276 ushort pageno, bufhead;
2277 void __iomem *baseAddr, *ofsAddr, *ofs;
2278
b4173f45
JS
2279 ofsAddr = port->tableAddr;
2280 baseAddr = port->board->basemem;
1da177e4
LT
2281 head = readw(ofsAddr + RXrptr);
2282 tail = readw(ofsAddr + RXwptr);
2283 rx_mask = readw(ofsAddr + RX_mask);
2284 spage = readw(ofsAddr + Page_rxb);
2285 epage = readw(ofsAddr + EndPage_rxb);
2286 count = (tail >= head) ? (tail - head)
2287 : (tail - head + rx_mask + 1);
2288 if (count == 0)
33f0f88f 2289 return 0;
1da177e4 2290
33f0f88f 2291 total = count;
1da177e4 2292 remain = count - total;
b4173f45 2293 moxaLog.rxcnt[port->tty->index] += total;
1da177e4
LT
2294 count = total;
2295 if (spage == epage) {
2296 bufhead = readw(ofsAddr + Ofs_rxb);
2297 writew(spage, baseAddr + Control_reg);
2298 while (count > 0) {
2299 if (tail >= head)
2300 len = tail - head;
2301 else
2302 len = rx_mask + 1 - head;
2303 len = (count > len) ? len : count;
2304 ofs = baseAddr + DynPage_addr + bufhead + head;
2305 for (i = 0; i < len; i++)
33f0f88f 2306 tty_insert_flip_char(tty, readb(ofs + i), TTY_NORMAL);
1da177e4
LT
2307 head = (head + len) & rx_mask;
2308 count -= len;
2309 }
2310 writew(head, ofsAddr + RXrptr);
2311 } else {
2312 len = count;
2313 pageno = spage + (head >> 13);
2314 pageofs = head & Page_mask;
2315 do {
2316 cnt = Page_size - pageofs;
2317 if (cnt > count)
2318 cnt = count;
2319 count -= cnt;
2320 writew(pageno, baseAddr + Control_reg);
2321 ofs = baseAddr + DynPage_addr + pageofs;
2322 for (i = 0; i < cnt; i++)
33f0f88f 2323 tty_insert_flip_char(tty, readb(ofs + i), TTY_NORMAL);
1da177e4
LT
2324 if (count == 0) {
2325 writew((head + len) & rx_mask, ofsAddr + RXrptr);
2326 break;
2327 }
2328 if (++pageno == epage)
2329 pageno = spage;
2330 pageofs = 0;
2331 } while (1);
2332 }
2333 if ((readb(ofsAddr + FlagStat) & Xoff_state) && (remain < LowWater)) {
2334 moxaLowWaterChk = 1;
b4173f45 2335 port->lowChkFlag = 1;
1da177e4
LT
2336 }
2337 return (total);
2338}
2339
2340
b4173f45 2341static int MoxaPortTxQueue(struct moxa_port *port)
1da177e4 2342{
b4173f45 2343 void __iomem *ofsAddr = port->tableAddr;
1da177e4
LT
2344 ushort rptr, wptr, mask;
2345 int len;
2346
1da177e4
LT
2347 rptr = readw(ofsAddr + TXrptr);
2348 wptr = readw(ofsAddr + TXwptr);
2349 mask = readw(ofsAddr + TX_mask);
2350 len = (wptr - rptr) & mask;
2351 return (len);
2352}
2353
b4173f45 2354static int MoxaPortTxFree(struct moxa_port *port)
1da177e4 2355{
b4173f45 2356 void __iomem *ofsAddr = port->tableAddr;
1da177e4
LT
2357 ushort rptr, wptr, mask;
2358 int len;
2359
1da177e4
LT
2360 rptr = readw(ofsAddr + TXrptr);
2361 wptr = readw(ofsAddr + TXwptr);
2362 mask = readw(ofsAddr + TX_mask);
2363 len = mask - ((wptr - rptr) & mask);
2364 return (len);
2365}
2366
b4173f45 2367static int MoxaPortRxQueue(struct moxa_port *port)
1da177e4 2368{
b4173f45 2369 void __iomem *ofsAddr = port->tableAddr;
1da177e4
LT
2370 ushort rptr, wptr, mask;
2371 int len;
2372
1da177e4
LT
2373 rptr = readw(ofsAddr + RXrptr);
2374 wptr = readw(ofsAddr + RXwptr);
2375 mask = readw(ofsAddr + RX_mask);
2376 len = (wptr - rptr) & mask;
2377 return (len);
2378}
2379
2380
b4173f45 2381static void MoxaPortTxDisable(struct moxa_port *port)
1da177e4 2382{
b4173f45 2383 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
1da177e4
LT
2384}
2385
b4173f45 2386static void MoxaPortTxEnable(struct moxa_port *port)
1da177e4 2387{
b4173f45 2388 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
1da177e4
LT
2389}
2390
2391
b4173f45 2392static int MoxaPortResetBrkCnt(struct moxa_port *port)
1da177e4
LT
2393{
2394 ushort cnt;
b4173f45
JS
2395 cnt = port->breakCnt;
2396 port->breakCnt = 0;
1da177e4
LT
2397 return (cnt);
2398}
2399
2400
b4173f45 2401static void MoxaPortSendBreak(struct moxa_port *port, int ms100)
1da177e4 2402{
b4173f45 2403 void __iomem *ofsAddr = port->tableAddr;
1da177e4 2404
1da177e4
LT
2405 if (ms100) {
2406 moxafunc(ofsAddr, FC_SendBreak, Magic_code);
24c032f1 2407 msleep(ms100 * 10);
1da177e4
LT
2408 } else {
2409 moxafunc(ofsAddr, FC_SendBreak, Magic_code);
24c032f1 2410 msleep(250);
1da177e4
LT
2411 }
2412 moxafunc(ofsAddr, FC_StopBreak, Magic_code);
2413}
2414
8f8ecbad 2415static int moxa_get_serial_info(struct moxa_port *info,
1da177e4
LT
2416 struct serial_struct __user *retinfo)
2417{
2418 struct serial_struct tmp;
2419
2420 memset(&tmp, 0, sizeof(tmp));
2421 tmp.type = info->type;
b4173f45 2422 tmp.line = info->tty->index;
1da177e4
LT
2423 tmp.port = 0;
2424 tmp.irq = 0;
2425 tmp.flags = info->asyncflags;
2426 tmp.baud_base = 921600;
2427 tmp.close_delay = info->close_delay;
1da177e4
LT
2428 tmp.custom_divisor = 0;
2429 tmp.hub6 = 0;
2430 if(copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2431 return -EFAULT;
2432 return (0);
2433}
2434
2435
8f8ecbad 2436static int moxa_set_serial_info(struct moxa_port *info,
1da177e4
LT
2437 struct serial_struct __user *new_info)
2438{
2439 struct serial_struct new_serial;
2440
2441 if(copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2442 return -EFAULT;
2443
2444 if ((new_serial.irq != 0) ||
2445 (new_serial.port != 0) ||
2446// (new_serial.type != info->type) ||
2447 (new_serial.custom_divisor != 0) ||
2448 (new_serial.baud_base != 921600))
2449 return (-EPERM);
2450
2451 if (!capable(CAP_SYS_ADMIN)) {
2452 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
2453 (info->asyncflags & ~ASYNC_USR_MASK)))
2454 return (-EPERM);
2455 } else {
2456 info->close_delay = new_serial.close_delay * HZ / 100;
1da177e4
LT
2457 }
2458
2459 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
2460 new_serial.flags |= (info->asyncflags & ASYNC_FLAGS);
2461
2462 if (new_serial.type == PORT_16550A) {
b4173f45 2463 MoxaSetFifo(info, 1);
1da177e4 2464 } else {
b4173f45 2465 MoxaSetFifo(info, 0);
1da177e4
LT
2466 }
2467
2468 info->type = new_serial.type;
2469 return (0);
2470}
2471
2472
2473
2474/*****************************************************************************
2475 * Static local functions: *
2476 *****************************************************************************/
1da177e4
LT
2477static void moxafunc(void __iomem *ofsAddr, int cmd, ushort arg)
2478{
2479
2480 writew(arg, ofsAddr + FuncArg);
2481 writew(cmd, ofsAddr + FuncCode);
6f56b658 2482 moxa_wait_finish(ofsAddr);
1da177e4
LT
2483}
2484
6f56b658 2485static void moxa_wait_finish(void __iomem *ofsAddr)
1da177e4
LT
2486{
2487 unsigned long i, j;
2488
2489 i = jiffies;
2490 while (readw(ofsAddr + FuncCode) != 0) {
2491 j = jiffies;
2492 if ((j - i) > moxaFuncTout) {
2493 return;
2494 }
2495 }
2496}
2497
6f56b658 2498static void moxa_low_water_check(void __iomem *ofsAddr)
1da177e4
LT
2499{
2500 int len;
2501 ushort rptr, wptr, mask;
2502
2503 if (readb(ofsAddr + FlagStat) & Xoff_state) {
2504 rptr = readw(ofsAddr + RXrptr);
2505 wptr = readw(ofsAddr + RXwptr);
2506 mask = readw(ofsAddr + RX_mask);
2507 len = (wptr - rptr) & mask;
2508 if (len <= Low_water)
2509 moxafunc(ofsAddr, FC_SendXon, 0);
2510 }
2511}
2512
b4173f45 2513static void MoxaSetFifo(struct moxa_port *port, int enable)
1da177e4 2514{
b4173f45 2515 void __iomem *ofsAddr = port->tableAddr;
1da177e4
LT
2516
2517 if (!enable) {
2518 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2519 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2520 } else {
2521 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2522 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
2523 }
2524}
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