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[deliverable/linux.git] / drivers / char / moxa.c
CommitLineData
1da177e4
LT		 1/*****************************************************************************/
2/*
3 * moxa.c -- MOXA Intellio family multiport serial driver.
4 *
b9705b60
JS		 5 * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com).
6 * Copyright (c) 2007 Jiri Slaby <jirislaby@gmail.com>
1da177e4
LT		 7 *
8 * This code is loosely based on the Linux serial driver, written by
9 * Linus Torvalds, Theodore T'so and others.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
1da177e4
LT		 15 */
16
17/*
18 * MOXA Intellio Series Driver
19 * for : LINUX
20 * date : 1999/1/7
21 * version : 5.1
22 */
23
1da177e4
LT		 24#include <linux/module.h>
25#include <linux/types.h>
26#include <linux/mm.h>
27#include <linux/ioport.h>
28#include <linux/errno.h>
03718234 29#include <linux/firmware.h>
1da177e4
LT		 30#include <linux/signal.h>
31#include <linux/sched.h>
32#include <linux/timer.h>
33#include <linux/interrupt.h>
34#include <linux/tty.h>
35#include <linux/tty_flip.h>
36#include <linux/major.h>
37#include <linux/string.h>
38#include <linux/fcntl.h>
39#include <linux/ptrace.h>
40#include <linux/serial.h>
41#include <linux/tty_driver.h>
42#include <linux/delay.h>
43#include <linux/pci.h>
44#include <linux/init.h>
45#include <linux/bitops.h>
46
47#include <asm/system.h>
48#include <asm/io.h>
49#include <asm/uaccess.h>
50
03718234
JS		 51#include "moxa.h"
52
b9705b60 53#define MOXA_VERSION "6.0k"
1da177e4 54
03718234
JS		 55#define MOXA_FW_HDRLEN 32
56
11324edd 57#define MOXAMAJOR 172
1da177e4 58
11324edd 59#define MAX_BOARDS 4 /* Don't change this value */
1da177e4 60#define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
11324edd 61#define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
1da177e4 62
08d01c79
JS		 63#define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \
64 (brd)->boardType == MOXA_BOARD_C320_PCI)
65
1da177e4
LT		 66/*
67 * Define the Moxa PCI vendor and device IDs.
68 */
11324edd
JS		 69#define MOXA_BUS_TYPE_ISA 0
70#define MOXA_BUS_TYPE_PCI 1
1da177e4 71
1da177e4
LT		 72enum {
73 MOXA_BOARD_C218_PCI = 1,
74 MOXA_BOARD_C218_ISA,
75 MOXA_BOARD_C320_PCI,
76 MOXA_BOARD_C320_ISA,
77 MOXA_BOARD_CP204J,
78};
79
80static char *moxa_brdname[] =
81{
82 "C218 Turbo PCI series",
83 "C218 Turbo ISA series",
84 "C320 Turbo PCI series",
85 "C320 Turbo ISA series",
86 "CP-204J series",
87};
88
89#ifdef CONFIG_PCI
90static struct pci_device_id moxa_pcibrds[] = {
5ebb4078
JS		 91 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218),
92 .driver_data = MOXA_BOARD_C218_PCI },
93 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320),
94 .driver_data = MOXA_BOARD_C320_PCI },
95 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J),
96 .driver_data = MOXA_BOARD_CP204J },
1da177e4
LT		 97 { 0 }
98};
99MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
100#endif /* CONFIG_PCI */
101
03718234
JS		 102struct moxa_port;
103
8f8ecbad 104static struct moxa_board_conf {
1da177e4
LT		 105 int boardType;
106 int numPorts;
1da177e4 107 int busType;
8f8ecbad 108
810ab09b 109 unsigned int ready;
8f8ecbad 110
03718234
JS		 111 struct moxa_port *ports;
112
8f8ecbad
JS		 113 void __iomem *basemem;
114 void __iomem *intNdx;
115 void __iomem *intPend;
116 void __iomem *intTable;
117} moxa_boards[MAX_BOARDS];
118
119struct mxser_mstatus {
120 tcflag_t cflag;
121 int cts;
122 int dsr;
123 int ri;
124 int dcd;
9dff89cd 125};
1da177e4 126
8f8ecbad
JS		 127struct moxaq_str {
128 int inq;
129 int outq;
130};
1da177e4 131
8f8ecbad 132struct moxa_port {
9de6a51f 133 struct tty_port port;
b4173f45 134 struct moxa_board_conf *board;
7bcf97d1
JS		 135 void __iomem *tableAddr;
136
1da177e4 137 int type;
1da177e4 138 int close_delay;
1da177e4 139 int cflag;
7bcf97d1 140 unsigned long statusflags;
1da177e4 141
7bcf97d1
JS		 142 u8 DCDState;
143 u8 lineCtrl;
144 u8 lowChkFlag;
8f8ecbad 145};
1da177e4 146
74d7d97b
JS		 147struct mon_str {
148 int tick;
149 int rxcnt[MAX_PORTS];
150 int txcnt[MAX_PORTS];
151};
152
1da177e4
LT		 153/* statusflags */
154#define TXSTOPPED 0x1
155#define LOWWAIT 0x2
156#define EMPTYWAIT 0x4
157#define THROTTLE 0x8
158
1da177e4
LT		 159#define SERIAL_DO_RESTART
160
1da177e4
LT		 161#define WAKEUP_CHARS 256
162
1da177e4 163static int ttymajor = MOXAMAJOR;
74d7d97b
JS		 164static struct mon_str moxaLog;
165static unsigned int moxaFuncTout = HZ / 2;
7bcf97d1 166static unsigned int moxaLowWaterChk;
a8f5cda0 167static DEFINE_MUTEX(moxa_openlock);
1da177e4
LT		 168/* Variables for insmod */
169#ifdef MODULE
d353eca4
JS		 170static unsigned long baseaddr[MAX_BOARDS];
171static unsigned int type[MAX_BOARDS];
172static unsigned int numports[MAX_BOARDS];
1da177e4
LT		 173#endif
174
175MODULE_AUTHOR("William Chen");
176MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
177MODULE_LICENSE("GPL");
178#ifdef MODULE
d353eca4
JS		 179module_param_array(type, uint, NULL, 0);
180MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
181module_param_array(baseaddr, ulong, NULL, 0);
182MODULE_PARM_DESC(baseaddr, "base address");
183module_param_array(numports, uint, NULL, 0);
184MODULE_PARM_DESC(numports, "numports (ignored for C218)");
1da177e4
LT		 185#endif
186module_param(ttymajor, int, 0);
1da177e4 187
1da177e4
LT		 188/*
189 * static functions:
190 */
1da177e4
LT		 191static int moxa_open(struct tty_struct *, struct file *);
192static void moxa_close(struct tty_struct *, struct file *);
193static int moxa_write(struct tty_struct *, const unsigned char *, int);
194static int moxa_write_room(struct tty_struct *);
195static void moxa_flush_buffer(struct tty_struct *);
196static int moxa_chars_in_buffer(struct tty_struct *);
1da177e4
LT		 197static void moxa_throttle(struct tty_struct *);
198static void moxa_unthrottle(struct tty_struct *);
606d099c 199static void moxa_set_termios(struct tty_struct *, struct ktermios *);
1da177e4
LT		 200static void moxa_stop(struct tty_struct *);
201static void moxa_start(struct tty_struct *);
202static void moxa_hangup(struct tty_struct *);
203static int moxa_tiocmget(struct tty_struct *tty, struct file *file);
204static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
205 unsigned int set, unsigned int clear);
206static void moxa_poll(unsigned long);
db1acaa6 207static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
6f56b658 208static void moxa_setup_empty_event(struct tty_struct *);
6f56b658 209static void moxa_shut_down(struct moxa_port *);
1da177e4
LT		 210/*
211 * moxa board interface functions:
212 */
b4173f45
JS		 213static void MoxaPortEnable(struct moxa_port *);
214static void MoxaPortDisable(struct moxa_port *);
215static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
216static int MoxaPortGetLineOut(struct moxa_port *, int *, int *);
217static void MoxaPortLineCtrl(struct moxa_port *, int, int);
218static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
219static int MoxaPortLineStatus(struct moxa_port *);
b4173f45 220static void MoxaPortFlushData(struct moxa_port *, int);
2108eba5 221static int MoxaPortWriteData(struct moxa_port *, const unsigned char *, int);
7bcf97d1 222static int MoxaPortReadData(struct moxa_port *);
b4173f45
JS		 223static int MoxaPortTxQueue(struct moxa_port *);
224static int MoxaPortRxQueue(struct moxa_port *);
225static int MoxaPortTxFree(struct moxa_port *);
226static void MoxaPortTxDisable(struct moxa_port *);
227static void MoxaPortTxEnable(struct moxa_port *);
8f8ecbad
JS		 228static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *);
229static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *);
b4173f45 230static void MoxaSetFifo(struct moxa_port *port, int enable);
1da177e4 231
74d7d97b
JS		 232/*
233 * I/O functions
234 */
235
236static void moxa_wait_finish(void __iomem *ofsAddr)
237{
238 unsigned long end = jiffies + moxaFuncTout;
239
240 while (readw(ofsAddr + FuncCode) != 0)
241 if (time_after(jiffies, end))
242 return;
243 if (readw(ofsAddr + FuncCode) != 0 && printk_ratelimit())
244 printk(KERN_WARNING "moxa function expired\n");
245}
246
eaa95a8d 247static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
74d7d97b
JS		 248{
249 writew(arg, ofsAddr + FuncArg);
250 writew(cmd, ofsAddr + FuncCode);
251 moxa_wait_finish(ofsAddr);
252}
253
7bcf97d1
JS		 254static void moxa_low_water_check(void __iomem *ofsAddr)
255{
256 u16 rptr, wptr, mask, len;
257
258 if (readb(ofsAddr + FlagStat) & Xoff_state) {
259 rptr = readw(ofsAddr + RXrptr);
260 wptr = readw(ofsAddr + RXwptr);
261 mask = readw(ofsAddr + RX_mask);
262 len = (wptr - rptr) & mask;
263 if (len <= Low_water)
264 moxafunc(ofsAddr, FC_SendXon, 0);
265 }
266}
267
74d7d97b
JS		 268/*
269 * TTY operations
270 */
271
272static int moxa_ioctl(struct tty_struct *tty, struct file *file,
273 unsigned int cmd, unsigned long arg)
274{
275 struct moxa_port *ch = tty->driver_data;
276 void __user *argp = (void __user *)arg;
a8f5cda0 277 int status, ret = 0;
74d7d97b
JS		 278
279 if (tty->index == MAX_PORTS) {
280 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
281 cmd != MOXA_GETMSTATUS)
282 return -EINVAL;
283 } else if (!ch)
284 return -ENODEV;
285
286 switch (cmd) {
287 case MOXA_GETDATACOUNT:
288 moxaLog.tick = jiffies;
a8f5cda0
JS		 289 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
290 ret = -EFAULT;
291 break;
74d7d97b
JS		 292 case MOXA_FLUSH_QUEUE:
293 MoxaPortFlushData(ch, arg);
a8f5cda0 294 break;
74d7d97b
JS		 295 case MOXA_GET_IOQUEUE: {
296 struct moxaq_str __user *argm = argp;
297 struct moxaq_str tmp;
298 struct moxa_port *p;
299 unsigned int i, j;
300
a8f5cda0 301 mutex_lock(&moxa_openlock);
74d7d97b
JS		 302 for (i = 0; i < MAX_BOARDS; i++) {
303 p = moxa_boards[i].ports;
304 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
305 memset(&tmp, 0, sizeof(tmp));
306 if (moxa_boards[i].ready) {
307 tmp.inq = MoxaPortRxQueue(p);
308 tmp.outq = MoxaPortTxQueue(p);
309 }
a8f5cda0
JS		 310 if (copy_to_user(argm, &tmp, sizeof(tmp))) {
311 mutex_unlock(&moxa_openlock);
74d7d97b 312 return -EFAULT;
a8f5cda0 313 }
74d7d97b
JS		 314 }
315 }
a8f5cda0
JS		 316 mutex_unlock(&moxa_openlock);
317 break;
74d7d97b
JS		 318 } case MOXA_GET_OQUEUE:
319 status = MoxaPortTxQueue(ch);
a8f5cda0
JS		 320 ret = put_user(status, (unsigned long __user *)argp);
321 break;
74d7d97b
JS		 322 case MOXA_GET_IQUEUE:
323 status = MoxaPortRxQueue(ch);
a8f5cda0
JS		 324 ret = put_user(status, (unsigned long __user *)argp);
325 break;
74d7d97b
JS		 326 case MOXA_GETMSTATUS: {
327 struct mxser_mstatus __user *argm = argp;
328 struct mxser_mstatus tmp;
329 struct moxa_port *p;
330 unsigned int i, j;
331
a8f5cda0 332 mutex_lock(&moxa_openlock);
74d7d97b
JS		 333 for (i = 0; i < MAX_BOARDS; i++) {
334 p = moxa_boards[i].ports;
335 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
336 memset(&tmp, 0, sizeof(tmp));
337 if (!moxa_boards[i].ready)
338 goto copy;
339
340 status = MoxaPortLineStatus(p);
341 if (status & 1)
342 tmp.cts = 1;
343 if (status & 2)
344 tmp.dsr = 1;
345 if (status & 4)
346 tmp.dcd = 1;
347
9de6a51f 348 if (!p->port.tty || !p->port.tty->termios)
74d7d97b
JS		 349 tmp.cflag = p->cflag;
350 else
9de6a51f 351 tmp.cflag = p->port.tty->termios->c_cflag;
74d7d97b 352copy:
a8f5cda0
JS		 353 if (copy_to_user(argm, &tmp, sizeof(tmp))) {
354 mutex_unlock(&moxa_openlock);
74d7d97b 355 return -EFAULT;
a8f5cda0 356 }
74d7d97b
JS		 357 }
358 }
a8f5cda0
JS		 359 mutex_unlock(&moxa_openlock);
360 break;
74d7d97b
JS		 361 }
362 case TIOCGSERIAL:
a8f5cda0
JS		 363 mutex_lock(&moxa_openlock);
364 ret = moxa_get_serial_info(ch, argp);
365 mutex_unlock(&moxa_openlock);
366 break;
74d7d97b 367 case TIOCSSERIAL:
a8f5cda0
JS		 368 mutex_lock(&moxa_openlock);
369 ret = moxa_set_serial_info(ch, argp);
370 mutex_unlock(&moxa_openlock);
371 break;
372 default:
373 ret = -ENOIOCTLCMD;
74d7d97b 374 }
a8f5cda0 375 return ret;
74d7d97b
JS		 376}
377
378static void moxa_break_ctl(struct tty_struct *tty, int state)
379{
380 struct moxa_port *port = tty->driver_data;
381
382 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
383 Magic_code);
384}
385
b68e31d0 386static const struct tty_operations moxa_ops = {
1da177e4
LT		 387 .open = moxa_open,
388 .close = moxa_close,
389 .write = moxa_write,
390 .write_room = moxa_write_room,
391 .flush_buffer = moxa_flush_buffer,
392 .chars_in_buffer = moxa_chars_in_buffer,
1da177e4
LT		 393 .ioctl = moxa_ioctl,
394 .throttle = moxa_throttle,
395 .unthrottle = moxa_unthrottle,
396 .set_termios = moxa_set_termios,
397 .stop = moxa_stop,
398 .start = moxa_start,
399 .hangup = moxa_hangup,
74d7d97b 400 .break_ctl = moxa_break_ctl,
1da177e4
LT		 401 .tiocmget = moxa_tiocmget,
402 .tiocmset = moxa_tiocmset,
403};
404
aa7e5221 405static struct tty_driver *moxaDriver;
aa7e5221 406static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
34af946a 407static DEFINE_SPINLOCK(moxa_lock);
33f0f88f 408
74d7d97b
JS		 409/*
410 * HW init
411 */
412
03718234
JS		 413static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
414{
415 switch (brd->boardType) {
416 case MOXA_BOARD_C218_ISA:
417 case MOXA_BOARD_C218_PCI:
418 if (model != 1)
419 goto err;
420 break;
421 case MOXA_BOARD_CP204J:
422 if (model != 3)
423 goto err;
424 break;
425 default:
426 if (model != 2)
427 goto err;
428 break;
429 }
430 return 0;
431err:
432 return -EINVAL;
433}
434
435static int moxa_check_fw(const void *ptr)
436{
437 const __le16 *lptr = ptr;
438
439 if (*lptr != cpu_to_le16(0x7980))
440 return -EINVAL;
441
442 return 0;
443}
444
445static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
446 size_t len)
447{
448 void __iomem *baseAddr = brd->basemem;
449 u16 tmp;
450
451 writeb(HW_reset, baseAddr + Control_reg); /* reset */
452 msleep(10);
453 memset_io(baseAddr, 0, 4096);
454 memcpy_toio(baseAddr, buf, len); /* download BIOS */
455 writeb(0, baseAddr + Control_reg); /* restart */
456
457 msleep(2000);
458
459 switch (brd->boardType) {
460 case MOXA_BOARD_C218_ISA:
461 case MOXA_BOARD_C218_PCI:
462 tmp = readw(baseAddr + C218_key);
463 if (tmp != C218_KeyCode)
464 goto err;
465 break;
466 case MOXA_BOARD_CP204J:
467 tmp = readw(baseAddr + C218_key);
468 if (tmp != CP204J_KeyCode)
469 goto err;
470 break;
471 default:
472 tmp = readw(baseAddr + C320_key);
473 if (tmp != C320_KeyCode)
474 goto err;
475 tmp = readw(baseAddr + C320_status);
476 if (tmp != STS_init) {
eaa95a8d 477 printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic "
03718234
JS		 478 "module not found\n");
479 return -EIO;
480 }
481 break;
482 }
483
484 return 0;
485err:
eaa95a8d 486 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
03718234
JS		 487 return -EIO;
488}
489
490static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
491 size_t len)
492{
493 void __iomem *baseAddr = brd->basemem;
494
495 if (len < 7168) {
eaa95a8d 496 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
03718234
JS		 497 return -EINVAL;
498 }
499
500 writew(len - 7168 - 2, baseAddr + C320bapi_len);
501 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
502 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
503 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
504 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
505
506 return 0;
507}
508
5292bcd3 509static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
03718234
JS		 510 size_t len)
511{
512 void __iomem *baseAddr = brd->basemem;
513 const u16 *uptr = ptr;
514 size_t wlen, len2, j;
5292bcd3 515 unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
08d01c79 516 unsigned int i, retry;
03718234
JS		 517 u16 usum, keycode;
518
5292bcd3
JS		 519 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
520 C218_KeyCode;
03718234 521
5292bcd3
JS		 522 switch (brd->boardType) {
523 case MOXA_BOARD_CP204J:
524 case MOXA_BOARD_C218_ISA:
525 case MOXA_BOARD_C218_PCI:
526 key = C218_key;
527 loadbuf = C218_LoadBuf;
528 loadlen = C218DLoad_len;
529 checksum = C218check_sum;
530 checksum_ok = C218chksum_ok;
531 break;
532 default:
533 key = C320_key;
534 keycode = C320_KeyCode;
535 loadbuf = C320_LoadBuf;
536 loadlen = C320DLoad_len;
537 checksum = C320check_sum;
538 checksum_ok = C320chksum_ok;
539 break;
03718234 540 }
03718234
JS		 541
542 usum = 0;
543 wlen = len >> 1;
544 for (i = 0; i < wlen; i++)
545 usum += le16_to_cpu(uptr[i]);
546 retry = 0;
547 do {
548 wlen = len >> 1;
549 j = 0;
550 while (wlen) {
551 len2 = (wlen > 2048) ? 2048 : wlen;
552 wlen -= len2;
5292bcd3 553 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
03718234 554 j += len2 << 1;
5292bcd3
JS		 555
556 writew(len2, baseAddr + loadlen);
557 writew(0, baseAddr + key);
558 for (i = 0; i < 100; i++) {
559 if (readw(baseAddr + key) == keycode)
03718234
JS		 560 break;
561 msleep(10);
562 }
5292bcd3 563 if (readw(baseAddr + key) != keycode)
03718234
JS		 564 return -EIO;
565 }
5292bcd3
JS		 566 writew(0, baseAddr + loadlen);
567 writew(usum, baseAddr + checksum);
568 writew(0, baseAddr + key);
569 for (i = 0; i < 100; i++) {
570 if (readw(baseAddr + key) == keycode)
03718234
JS		 571 break;
572 msleep(10);
573 }
574 retry++;
5292bcd3
JS		 575 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
576 if (readb(baseAddr + checksum_ok) != 1)
03718234
JS		 577 return -EIO;
578
5292bcd3 579 writew(0, baseAddr + key);
03718234
JS		 580 for (i = 0; i < 600; i++) {
581 if (readw(baseAddr + Magic_no) == Magic_code)
582 break;
583 msleep(10);
584 }
585 if (readw(baseAddr + Magic_no) != Magic_code)
586 return -EIO;
587
08d01c79 588 if (MOXA_IS_320(brd)) {
5292bcd3
JS		 589 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
590 writew(0x3800, baseAddr + TMS320_PORT1);
591 writew(0x3900, baseAddr + TMS320_PORT2);
592 writew(28499, baseAddr + TMS320_CLOCK);
593 } else {
594 writew(0x3200, baseAddr + TMS320_PORT1);
595 writew(0x3400, baseAddr + TMS320_PORT2);
596 writew(19999, baseAddr + TMS320_CLOCK);
597 }
03718234
JS		 598 }
599 writew(1, baseAddr + Disable_IRQ);
600 writew(0, baseAddr + Magic_no);
601 for (i = 0; i < 500; i++) {
602 if (readw(baseAddr + Magic_no) == Magic_code)
603 break;
604 msleep(10);
605 }
606 if (readw(baseAddr + Magic_no) != Magic_code)
607 return -EIO;
608
08d01c79 609 if (MOXA_IS_320(brd)) {
5292bcd3
JS		 610 j = readw(baseAddr + Module_cnt);
611 if (j <= 0)
612 return -EIO;
613 brd->numPorts = j * 8;
614 writew(j, baseAddr + Module_no);
615 writew(0, baseAddr + Magic_no);
616 for (i = 0; i < 600; i++) {
617 if (readw(baseAddr + Magic_no) == Magic_code)
618 break;
619 msleep(10);
620 }
621 if (readw(baseAddr + Magic_no) != Magic_code)
622 return -EIO;
03718234 623 }
03718234
JS		 624 brd->intNdx = baseAddr + IRQindex;
625 brd->intPend = baseAddr + IRQpending;
626 brd->intTable = baseAddr + IRQtable;
627
628 return 0;
629}
630
631static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
632 size_t len)
633{
634 void __iomem *ofsAddr, *baseAddr = brd->basemem;
635 struct moxa_port *port;
636 int retval, i;
637
638 if (len % 2) {
eaa95a8d 639 printk(KERN_ERR "MOXA: bios length is not even\n");
03718234
JS		 640 return -EINVAL;
641 }
642
5292bcd3
JS		 643 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
644 if (retval)
645 return retval;
646
03718234
JS		 647 switch (brd->boardType) {
648 case MOXA_BOARD_C218_ISA:
649 case MOXA_BOARD_C218_PCI:
650 case MOXA_BOARD_CP204J:
03718234
JS		 651 port = brd->ports;
652 for (i = 0; i < brd->numPorts; i++, port++) {
b4173f45 653 port->board = brd;
03718234
JS		 654 port->DCDState = 0;
655 port->tableAddr = baseAddr + Extern_table +
656 Extern_size * i;
657 ofsAddr = port->tableAddr;
658 writew(C218rx_mask, ofsAddr + RX_mask);
659 writew(C218tx_mask, ofsAddr + TX_mask);
660 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
661 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
662
663 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
664 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
665
666 }
667 break;
668 default:
03718234
JS		 669 port = brd->ports;
670 for (i = 0; i < brd->numPorts; i++, port++) {
b4173f45 671 port->board = brd;
03718234
JS		 672 port->DCDState = 0;
673 port->tableAddr = baseAddr + Extern_table +
674 Extern_size * i;
675 ofsAddr = port->tableAddr;
676 switch (brd->numPorts) {
677 case 8:
678 writew(C320p8rx_mask, ofsAddr + RX_mask);
679 writew(C320p8tx_mask, ofsAddr + TX_mask);
680 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
681 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
682 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
683 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
684
685 break;
686 case 16:
687 writew(C320p16rx_mask, ofsAddr + RX_mask);
688 writew(C320p16tx_mask, ofsAddr + TX_mask);
689 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
690 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
691 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
692 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
693 break;
694
695 case 24:
696 writew(C320p24rx_mask, ofsAddr + RX_mask);
697 writew(C320p24tx_mask, ofsAddr + TX_mask);
698 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
699 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
700 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
701 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
702 break;
703 case 32:
704 writew(C320p32rx_mask, ofsAddr + RX_mask);
705 writew(C320p32tx_mask, ofsAddr + TX_mask);
706 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
707 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
708 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
709 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
710 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
711 break;
712 }
713 }
714 break;
715 }
03718234
JS		 716 return 0;
717}
718
719static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
720{
2bca76e8 721 const void *ptr = fw->data;
03718234
JS		 722 char rsn[64];
723 u16 lens[5];
724 size_t len;
725 unsigned int a, lenp, lencnt;
726 int ret = -EINVAL;
727 struct {
728 __le32 magic; /* 0x34303430 */
729 u8 reserved1[2];
730 u8 type; /* UNIX = 3 */
731 u8 model; /* C218T=1, C320T=2, CP204=3 */
732 u8 reserved2[8];
733 __le16 len[5];
2bca76e8 734 } const *hdr = ptr;
03718234
JS		 735
736 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
737
738 if (fw->size < MOXA_FW_HDRLEN) {
739 strcpy(rsn, "too short (even header won't fit)");
740 goto err;
741 }
742 if (hdr->magic != cpu_to_le32(0x30343034)) {
743 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
744 goto err;
745 }
746 if (hdr->type != 3) {
747 sprintf(rsn, "not for linux, type is %u", hdr->type);
748 goto err;
749 }
750 if (moxa_check_fw_model(brd, hdr->model)) {
751 sprintf(rsn, "not for this card, model is %u", hdr->model);
752 goto err;
753 }
754
755 len = MOXA_FW_HDRLEN;
756 lencnt = hdr->model == 2 ? 5 : 3;
757 for (a = 0; a < ARRAY_SIZE(lens); a++) {
758 lens[a] = le16_to_cpu(hdr->len[a]);
759 if (lens[a] && len + lens[a] <= fw->size &&
760 moxa_check_fw(&fw->data[len]))
eaa95a8d 761 printk(KERN_WARNING "MOXA firmware: unexpected input "
03718234
JS		 762 "at offset %u, but going on\n", (u32)len);
763 if (!lens[a] && a < lencnt) {
764 sprintf(rsn, "too few entries in fw file");
765 goto err;
766 }
767 len += lens[a];
768 }
769
770 if (len != fw->size) {
771 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
772 (u32)len);
773 goto err;
774 }
775
776 ptr += MOXA_FW_HDRLEN;
777 lenp = 0; /* bios */
778
779 strcpy(rsn, "read above");
780
781 ret = moxa_load_bios(brd, ptr, lens[lenp]);
782 if (ret)
783 goto err;
784
785 /* we skip the tty section (lens[1]), since we don't need it */
786 ptr += lens[lenp] + lens[lenp + 1];
787 lenp += 2; /* comm */
788
789 if (hdr->model == 2) {
790 ret = moxa_load_320b(brd, ptr, lens[lenp]);
791 if (ret)
792 goto err;
793 /* skip another tty */
794 ptr += lens[lenp] + lens[lenp + 1];
795 lenp += 2;
796 }
797
798 ret = moxa_load_code(brd, ptr, lens[lenp]);
799 if (ret)
800 goto err;
801
802 return 0;
803err:
804 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
805 return ret;
806}
807
808static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
809{
810 const struct firmware *fw;
811 const char *file;
810ab09b
JS		 812 struct moxa_port *p;
813 unsigned int i;
03718234
JS		 814 int ret;
815
810ab09b
JS		 816 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
817 GFP_KERNEL);
818 if (brd->ports == NULL) {
819 printk(KERN_ERR "cannot allocate memory for ports\n");
820 ret = -ENOMEM;
821 goto err;
822 }
823
824 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
825 p->type = PORT_16550A;
826 p->close_delay = 5 * HZ / 10;
827 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
9de6a51f 828 tty_port_init(&p->port);
810ab09b
JS		 829 }
830
03718234
JS		 831 switch (brd->boardType) {
832 case MOXA_BOARD_C218_ISA:
833 case MOXA_BOARD_C218_PCI:
834 file = "c218tunx.cod";
835 break;
836 case MOXA_BOARD_CP204J:
837 file = "cp204unx.cod";
838 break;
839 default:
840 file = "c320tunx.cod";
841 break;
842 }
843
844 ret = request_firmware(&fw, file, dev);
845 if (ret) {
ec09cd56
JS		 846 printk(KERN_ERR "MOXA: request_firmware failed. Make sure "
847 "you've placed '%s' file into your firmware "
848 "loader directory (e.g. /lib/firmware)\n",
849 file);
810ab09b 850 goto err_free;
03718234
JS		 851 }
852
853 ret = moxa_load_fw(brd, fw);
854
855 release_firmware(fw);
810ab09b
JS		 856
857 if (ret)
858 goto err_free;
859
2a541341 860 spin_lock_bh(&moxa_lock);
810ab09b 861 brd->ready = 1;
0bcc4caa
JS		 862 if (!timer_pending(&moxaTimer))
863 mod_timer(&moxaTimer, jiffies + HZ / 50);
2a541341 864 spin_unlock_bh(&moxa_lock);
0bcc4caa 865
810ab09b
JS		 866 return 0;
867err_free:
868 kfree(brd->ports);
869err:
03718234
JS		 870 return ret;
871}
872
810ab09b
JS		 873static void moxa_board_deinit(struct moxa_board_conf *brd)
874{
a8f5cda0
JS		 875 unsigned int a, opened;
876
877 mutex_lock(&moxa_openlock);
7bcf97d1 878 spin_lock_bh(&moxa_lock);
810ab09b 879 brd->ready = 0;
7bcf97d1 880 spin_unlock_bh(&moxa_lock);
a8f5cda0
JS		 881
882 /* pci hot-un-plug support */
883 for (a = 0; a < brd->numPorts; a++)
9de6a51f
AC		 884 if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
885 tty_hangup(brd->ports[a].port.tty);
a8f5cda0
JS		 886 while (1) {
887 opened = 0;
888 for (a = 0; a < brd->numPorts; a++)
9de6a51f 889 if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
a8f5cda0
JS		 890 opened++;
891 mutex_unlock(&moxa_openlock);
892 if (!opened)
893 break;
894 msleep(50);
895 mutex_lock(&moxa_openlock);
896 }
897
810ab09b
JS		 898 iounmap(brd->basemem);
899 brd->basemem = NULL;
900 kfree(brd->ports);
901}
902
1da177e4 903#ifdef CONFIG_PCI
9cde5bf0
JS		 904static int __devinit moxa_pci_probe(struct pci_dev *pdev,
905 const struct pci_device_id *ent)
1da177e4 906{
9cde5bf0
JS		 907 struct moxa_board_conf *board;
908 unsigned int i;
909 int board_type = ent->driver_data;
910 int retval;
911
912 retval = pci_enable_device(pdev);
7aeb95da
JS		 913 if (retval) {
914 dev_err(&pdev->dev, "can't enable pci device\n");
9cde5bf0 915 goto err;
7aeb95da 916 }
9cde5bf0
JS		 917
918 for (i = 0; i < MAX_BOARDS; i++)
919 if (moxa_boards[i].basemem == NULL)
920 break;
921
922 retval = -ENODEV;
923 if (i >= MAX_BOARDS) {
7aeb95da 924 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
9cde5bf0
JS		 925 "found. Board is ignored.\n", MAX_BOARDS);
926 goto err;
927 }
928
929 board = &moxa_boards[i];
e46a5e3f
JS		 930
931 retval = pci_request_region(pdev, 2, "moxa-base");
932 if (retval) {
933 dev_err(&pdev->dev, "can't request pci region 2\n");
934 goto err;
935 }
936
24cb2335 937 board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000);
7aeb95da
JS		 938 if (board->basemem == NULL) {
939 dev_err(&pdev->dev, "can't remap io space 2\n");
e46a5e3f 940 goto err_reg;
7aeb95da 941 }
9cde5bf0 942
1da177e4
LT		 943 board->boardType = board_type;
944 switch (board_type) {
945 case MOXA_BOARD_C218_ISA:
946 case MOXA_BOARD_C218_PCI:
947 board->numPorts = 8;
948 break;
949
950 case MOXA_BOARD_CP204J:
951 board->numPorts = 4;
952 break;
953 default:
954 board->numPorts = 0;
955 break;
956 }
957 board->busType = MOXA_BUS_TYPE_PCI;
a784bf7c 958
03718234
JS		 959 retval = moxa_init_board(board, &pdev->dev);
960 if (retval)
961 goto err_base;
962
9cde5bf0 963 pci_set_drvdata(pdev, board);
1da177e4 964
bb9f910a
JS		 965 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
966 moxa_brdname[board_type - 1], board->numPorts);
967
eaa95a8d 968 return 0;
03718234
JS		 969err_base:
970 iounmap(board->basemem);
971 board->basemem = NULL;
e46a5e3f
JS		 972err_reg:
973 pci_release_region(pdev, 2);
9cde5bf0
JS		 974err:
975 return retval;
976}
977
978static void __devexit moxa_pci_remove(struct pci_dev *pdev)
979{
980 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
981
810ab09b
JS		 982 moxa_board_deinit(brd);
983
e46a5e3f 984 pci_release_region(pdev, 2);
1da177e4 985}
a784bf7c
JS		 986
987static struct pci_driver moxa_pci_driver = {
988 .name = "moxa",
989 .id_table = moxa_pcibrds,
990 .probe = moxa_pci_probe,
991 .remove = __devexit_p(moxa_pci_remove)
992};
1da177e4
LT		 993#endif /* CONFIG_PCI */
994
995static int __init moxa_init(void)
996{
810ab09b 997 unsigned int isabrds = 0;
d353eca4 998 int retval = 0;
1da177e4 999
7aeb95da
JS		 1000 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
1001 MOXA_VERSION);
1da177e4
LT		 1002 moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
1003 if (!moxaDriver)
1004 return -ENOMEM;
1005
1da177e4 1006 moxaDriver->owner = THIS_MODULE;
9b4e3b13 1007 moxaDriver->name = "ttyMX";
1da177e4
LT		 1008 moxaDriver->major = ttymajor;
1009 moxaDriver->minor_start = 0;
1010 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
1011 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
1012 moxaDriver->init_termios = tty_std_termios;
1da177e4 1013 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
606d099c
AC		 1014 moxaDriver->init_termios.c_ispeed = 9600;
1015 moxaDriver->init_termios.c_ospeed = 9600;
1da177e4
LT		 1016 moxaDriver->flags = TTY_DRIVER_REAL_RAW;
1017 tty_set_operations(moxaDriver, &moxa_ops);
1018
1da177e4 1019 if (tty_register_driver(moxaDriver)) {
eaa95a8d 1020 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
1da177e4
LT		 1021 put_tty_driver(moxaDriver);
1022 return -1;
1023 }
1da177e4 1024
d353eca4 1025 /* Find the boards defined from module args. */
1da177e4 1026#ifdef MODULE
d353eca4
JS		 1027 {
1028 struct moxa_board_conf *brd = moxa_boards;
810ab09b 1029 unsigned int i;
1da177e4 1030 for (i = 0; i < MAX_BOARDS; i++) {
d353eca4
JS		 1031 if (!baseaddr[i])
1032 break;
1033 if (type[i] == MOXA_BOARD_C218_ISA ||
1034 type[i] == MOXA_BOARD_C320_ISA) {
7aeb95da 1035 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
d353eca4
JS		 1036 isabrds + 1, moxa_brdname[type[i] - 1],
1037 baseaddr[i]);
1038 brd->boardType = type[i];
1039 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
1040 numports[i];
1041 brd->busType = MOXA_BUS_TYPE_ISA;
24cb2335 1042 brd->basemem = ioremap_nocache(baseaddr[i], 0x4000);
d353eca4 1043 if (!brd->basemem) {
eaa95a8d 1044 printk(KERN_ERR "MOXA: can't remap %lx\n",
d353eca4 1045 baseaddr[i]);
1da177e4
LT		 1046 continue;
1047 }
03718234
JS		 1048 if (moxa_init_board(brd, NULL)) {
1049 iounmap(brd->basemem);
1050 brd->basemem = NULL;
1051 continue;
1052 }
d353eca4 1053
bb9f910a
JS		 1054 printk(KERN_INFO "MOXA isa board found at 0x%.8lu and "
1055 "ready (%u ports, firmware loaded)\n",
1056 baseaddr[i], brd->numPorts);
1057
d353eca4
JS		 1058 brd++;
1059 isabrds++;
1da177e4
LT		 1060 }
1061 }
d353eca4 1062 }
1da177e4 1063#endif
a784bf7c 1064
1da177e4 1065#ifdef CONFIG_PCI
a784bf7c
JS		 1066 retval = pci_register_driver(&moxa_pci_driver);
1067 if (retval) {
eaa95a8d 1068 printk(KERN_ERR "Can't register MOXA pci driver!\n");
d353eca4 1069 if (isabrds)
a784bf7c 1070 retval = 0;
1da177e4
LT		 1071 }
1072#endif
a784bf7c 1073
a784bf7c 1074 return retval;
1da177e4
LT		 1075}
1076
1077static void __exit moxa_exit(void)
1078{
eaa95a8d 1079 unsigned int i;
1da177e4 1080
9cde5bf0 1081#ifdef CONFIG_PCI
a784bf7c 1082 pci_unregister_driver(&moxa_pci_driver);
9cde5bf0 1083#endif
a784bf7c 1084
810ab09b
JS		 1085 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
1086 if (moxa_boards[i].ready)
1087 moxa_board_deinit(&moxa_boards[i]);
2a541341
JS		 1088
1089 del_timer_sync(&moxaTimer);
1090
1091 if (tty_unregister_driver(moxaDriver))
1092 printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
1093 "serial driver\n");
1094 put_tty_driver(moxaDriver);
1da177e4
LT		 1095}
1096
1097module_init(moxa_init);
1098module_exit(moxa_exit);
1099
a8f5cda0
JS		 1100static void moxa_close_port(struct moxa_port *ch)
1101{
1102 moxa_shut_down(ch);
1103 MoxaPortFlushData(ch, 2);
9de6a51f
AC		 1104 ch->port.flags &= ~ASYNC_NORMAL_ACTIVE;
1105 ch->port.tty->driver_data = NULL;
1106 ch->port.tty = NULL;
a8f5cda0
JS		 1107}
1108
1109static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,
1110 struct moxa_port *ch)
1111{
1112 DEFINE_WAIT(wait);
1113 int retval = 0;
1114 u8 dcd;
1115
1116 while (1) {
9de6a51f 1117 prepare_to_wait(&ch->port.open_wait, &wait, TASK_INTERRUPTIBLE);
a8f5cda0
JS		 1118 if (tty_hung_up_p(filp)) {
1119#ifdef SERIAL_DO_RESTART
1120 retval = -ERESTARTSYS;
1121#else
1122 retval = -EAGAIN;
1123#endif
1124 break;
1125 }
1126 spin_lock_bh(&moxa_lock);
1127 dcd = ch->DCDState;
1128 spin_unlock_bh(&moxa_lock);
1129 if (dcd)
1130 break;
1131
1132 if (signal_pending(current)) {
1133 retval = -ERESTARTSYS;
1134 break;
1135 }
1136 schedule();
1137 }
9de6a51f 1138 finish_wait(&ch->port.open_wait, &wait);
a8f5cda0
JS		 1139
1140 return retval;
1141}
1142
1da177e4
LT		 1143static int moxa_open(struct tty_struct *tty, struct file *filp)
1144{
810ab09b 1145 struct moxa_board_conf *brd;
8f8ecbad 1146 struct moxa_port *ch;
1da177e4
LT		 1147 int port;
1148 int retval;
1da177e4 1149
11324edd 1150 port = tty->index;
1da177e4 1151 if (port == MAX_PORTS) {
74d7d97b 1152 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
1da177e4 1153 }
a8f5cda0
JS		 1154 if (mutex_lock_interruptible(&moxa_openlock))
1155 return -ERESTARTSYS;
810ab09b 1156 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
a8f5cda0
JS		 1157 if (!brd->ready) {
1158 mutex_unlock(&moxa_openlock);
810ab09b 1159 return -ENODEV;
a8f5cda0 1160 }
1da177e4 1161
810ab09b 1162 ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
9de6a51f 1163 ch->port.count++;
1da177e4 1164 tty->driver_data = ch;
9de6a51f
AC		 1165 ch->port.tty = tty;
1166 if (!(ch->port.flags & ASYNC_INITIALIZED)) {
1da177e4 1167 ch->statusflags = 0;
db1acaa6 1168 moxa_set_tty_param(tty, tty->termios);
b4173f45
JS		 1169 MoxaPortLineCtrl(ch, 1, 1);
1170 MoxaPortEnable(ch);
a8f5cda0 1171 MoxaSetFifo(ch, ch->type == PORT_16550A);
9de6a51f 1172 ch->port.flags |= ASYNC_INITIALIZED;
1da177e4 1173 }
a8f5cda0 1174 mutex_unlock(&moxa_openlock);
1da177e4 1175
a8f5cda0
JS		 1176 retval = 0;
1177 if (!(filp->f_flags & O_NONBLOCK) && !C_CLOCAL(tty))
1178 retval = moxa_block_till_ready(tty, filp, ch);
1179 mutex_lock(&moxa_openlock);
1180 if (retval) {
9de6a51f
AC		 1181 if (ch->port.count) /* 0 means already hung up... */
1182 if (--ch->port.count == 0)
a8f5cda0
JS		 1183 moxa_close_port(ch);
1184 } else
9de6a51f 1185 ch->port.flags |= ASYNC_NORMAL_ACTIVE;
a8f5cda0 1186 mutex_unlock(&moxa_openlock);
1da177e4 1187
a8f5cda0 1188 return retval;
1da177e4
LT		 1189}
1190
1191static void moxa_close(struct tty_struct *tty, struct file *filp)
1192{
8f8ecbad 1193 struct moxa_port *ch;
1da177e4
LT		 1194 int port;
1195
11324edd 1196 port = tty->index;
a8f5cda0 1197 if (port == MAX_PORTS || tty_hung_up_p(filp))
1da177e4 1198 return;
1da177e4 1199
a8f5cda0
JS		 1200 mutex_lock(&moxa_openlock);
1201 ch = tty->driver_data;
1202 if (ch == NULL)
1203 goto unlock;
9de6a51f 1204 if (tty->count == 1 && ch->port.count != 1) {
7aeb95da 1205 printk(KERN_WARNING "moxa_close: bad serial port count; "
9de6a51f
AC		 1206 "tty->count is 1, ch->port.count is %d\n", ch->port.count);
1207 ch->port.count = 1;
1da177e4 1208 }
9de6a51f 1209 if (--ch->port.count < 0) {
7aeb95da
JS		 1210 printk(KERN_WARNING "moxa_close: bad serial port count, "
1211 "device=%s\n", tty->name);
9de6a51f 1212 ch->port.count = 0;
1da177e4 1213 }
9de6a51f 1214 if (ch->port.count)
a8f5cda0 1215 goto unlock;
1da177e4
LT		 1216
1217 ch->cflag = tty->termios->c_cflag;
9de6a51f 1218 if (ch->port.flags & ASYNC_INITIALIZED) {
6f56b658 1219 moxa_setup_empty_event(tty);
1da177e4 1220 tty_wait_until_sent(tty, 30 * HZ); /* 30 seconds timeout */
1da177e4 1221 }
1da177e4 1222
a8f5cda0
JS		 1223 moxa_close_port(ch);
1224unlock:
1225 mutex_unlock(&moxa_openlock);
1da177e4
LT		 1226}
1227
1228static int moxa_write(struct tty_struct *tty,
1229 const unsigned char *buf, int count)
1230{
b4173f45 1231 struct moxa_port *ch = tty->driver_data;
b4173f45 1232 int len;
1da177e4 1233
1da177e4 1234 if (ch == NULL)
b4173f45 1235 return 0;
33f0f88f 1236
7bcf97d1 1237 spin_lock_bh(&moxa_lock);
2108eba5 1238 len = MoxaPortWriteData(ch, buf, count);
7bcf97d1 1239 spin_unlock_bh(&moxa_lock);
1da177e4 1240
1da177e4 1241 ch->statusflags |= LOWWAIT;
eaa95a8d 1242 return len;
1da177e4
LT		 1243}
1244
1245static int moxa_write_room(struct tty_struct *tty)
1246{
8f8ecbad 1247 struct moxa_port *ch;
1da177e4
LT		 1248
1249 if (tty->stopped)
eaa95a8d 1250 return 0;
b4173f45 1251 ch = tty->driver_data;
1da177e4 1252 if (ch == NULL)
eaa95a8d 1253 return 0;
b4173f45 1254 return MoxaPortTxFree(ch);
1da177e4
LT		 1255}
1256
1257static void moxa_flush_buffer(struct tty_struct *tty)
1258{
b4173f45 1259 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1260
1261 if (ch == NULL)
1262 return;
b4173f45 1263 MoxaPortFlushData(ch, 1);
1da177e4
LT		 1264 tty_wakeup(tty);
1265}
1266
1267static int moxa_chars_in_buffer(struct tty_struct *tty)
1268{
b4173f45 1269 struct moxa_port *ch = tty->driver_data;
1da177e4 1270 int chars;
1da177e4
LT		 1271
1272 /*
1273 * Sigh...I have to check if driver_data is NULL here, because
1274 * if an open() fails, the TTY subsystem eventually calls
1275 * tty_wait_until_sent(), which calls the driver's chars_in_buffer()
1276 * routine. And since the open() failed, we return 0 here. TDJ
1277 */
1278 if (ch == NULL)
eaa95a8d 1279 return 0;
978e595f 1280 lock_kernel();
b4173f45 1281 chars = MoxaPortTxQueue(ch);
1da177e4
LT		 1282 if (chars) {
1283 /*
1284 * Make it possible to wakeup anything waiting for output
1285 * in tty_ioctl.c, etc.
1286 */
1287 if (!(ch->statusflags & EMPTYWAIT))
6f56b658 1288 moxa_setup_empty_event(tty);
1da177e4 1289 }
978e595f 1290 unlock_kernel();
eaa95a8d 1291 return chars;
1da177e4
LT		 1292}
1293
1da177e4
LT		 1294static int moxa_tiocmget(struct tty_struct *tty, struct file *file)
1295{
a8f5cda0 1296 struct moxa_port *ch;
1da177e4
LT		 1297 int flag = 0, dtr, rts;
1298
a8f5cda0
JS		 1299 mutex_lock(&moxa_openlock);
1300 ch = tty->driver_data;
1301 if (!ch) {
1302 mutex_unlock(&moxa_openlock);
74d7d97b 1303 return -EINVAL;
a8f5cda0 1304 }
1da177e4 1305
b4173f45 1306 MoxaPortGetLineOut(ch, &dtr, &rts);
1da177e4
LT		 1307 if (dtr)
1308 flag |= TIOCM_DTR;
1309 if (rts)
1310 flag |= TIOCM_RTS;
b4173f45 1311 dtr = MoxaPortLineStatus(ch);
1da177e4
LT		 1312 if (dtr & 1)
1313 flag |= TIOCM_CTS;
1314 if (dtr & 2)
1315 flag |= TIOCM_DSR;
1316 if (dtr & 4)
1317 flag |= TIOCM_CD;
a8f5cda0 1318 mutex_unlock(&moxa_openlock);
1da177e4
LT		 1319 return flag;
1320}
1321
1322static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
1323 unsigned int set, unsigned int clear)
1324{
a8f5cda0 1325 struct moxa_port *ch;
1da177e4
LT		 1326 int port;
1327 int dtr, rts;
1328
11324edd 1329 port = tty->index;
a8f5cda0
JS		 1330 mutex_lock(&moxa_openlock);
1331 ch = tty->driver_data;
1332 if (!ch) {
1333 mutex_unlock(&moxa_openlock);
74d7d97b 1334 return -EINVAL;
a8f5cda0 1335 }
1da177e4 1336
b4173f45 1337 MoxaPortGetLineOut(ch, &dtr, &rts);
1da177e4
LT		 1338 if (set & TIOCM_RTS)
1339 rts = 1;
1340 if (set & TIOCM_DTR)
1341 dtr = 1;
1342 if (clear & TIOCM_RTS)
1343 rts = 0;
1344 if (clear & TIOCM_DTR)
1345 dtr = 0;
b4173f45 1346 MoxaPortLineCtrl(ch, dtr, rts);
a8f5cda0 1347 mutex_unlock(&moxa_openlock);
1da177e4
LT		 1348 return 0;
1349}
1350
1da177e4
LT		 1351static void moxa_throttle(struct tty_struct *tty)
1352{
eaa95a8d 1353 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1354
1355 ch->statusflags |= THROTTLE;
1356}
1357
1358static void moxa_unthrottle(struct tty_struct *tty)
1359{
eaa95a8d 1360 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1361
1362 ch->statusflags &= ~THROTTLE;
1363}
1364
1365static void moxa_set_termios(struct tty_struct *tty,
eaa95a8d 1366 struct ktermios *old_termios)
1da177e4 1367{
eaa95a8d 1368 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1369
1370 if (ch == NULL)
1371 return;
db1acaa6 1372 moxa_set_tty_param(tty, old_termios);
eaa95a8d 1373 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
9de6a51f 1374 wake_up_interruptible(&ch->port.open_wait);
1da177e4
LT		 1375}
1376
1377static void moxa_stop(struct tty_struct *tty)
1378{
eaa95a8d 1379 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1380
1381 if (ch == NULL)
1382 return;
b4173f45 1383 MoxaPortTxDisable(ch);
1da177e4
LT		 1384 ch->statusflags |= TXSTOPPED;
1385}
1386
1387
1388static void moxa_start(struct tty_struct *tty)
1389{
eaa95a8d 1390 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1391
1392 if (ch == NULL)
1393 return;
1394
1395 if (!(ch->statusflags & TXSTOPPED))
1396 return;
1397
b4173f45 1398 MoxaPortTxEnable(ch);
1da177e4
LT		 1399 ch->statusflags &= ~TXSTOPPED;
1400}
1401
1402static void moxa_hangup(struct tty_struct *tty)
1403{
a8f5cda0 1404 struct moxa_port *ch;
1da177e4 1405
a8f5cda0
JS		 1406 mutex_lock(&moxa_openlock);
1407 ch = tty->driver_data;
1408 if (ch == NULL) {
1409 mutex_unlock(&moxa_openlock);
1410 return;
1411 }
9de6a51f 1412 ch->port.count = 0;
a8f5cda0
JS		 1413 moxa_close_port(ch);
1414 mutex_unlock(&moxa_openlock);
1415
9de6a51f 1416 wake_up_interruptible(&ch->port.open_wait);
1da177e4
LT		 1417}
1418
7bcf97d1 1419static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
1da177e4 1420{
7bcf97d1 1421 dcd = !!dcd;
1da177e4 1422
9de6a51f 1423 if (dcd != p->DCDState && p->port.tty && C_CLOCAL(p->port.tty)) {
a8f5cda0 1424 if (!dcd)
9de6a51f 1425 tty_hangup(p->port.tty);
7bcf97d1
JS		 1426 }
1427 p->DCDState = dcd;
1428}
1da177e4 1429
7bcf97d1
JS		 1430static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
1431 u16 __iomem *ip)
1432{
9de6a51f 1433 struct tty_struct *tty = p->port.tty;
7bcf97d1 1434 void __iomem *ofsAddr;
9de6a51f 1435 unsigned int inited = p->port.flags & ASYNC_INITIALIZED;
7bcf97d1
JS		 1436 u16 intr;
1437
1438 if (tty) {
1439 if ((p->statusflags & EMPTYWAIT) &&
1440 MoxaPortTxQueue(p) == 0) {
1441 p->statusflags &= ~EMPTYWAIT;
1442 tty_wakeup(tty);
1443 }
1444 if ((p->statusflags & LOWWAIT) && !tty->stopped &&
1445 MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
1446 p->statusflags &= ~LOWWAIT;
1447 tty_wakeup(tty);
1448 }
1449
1450 if (inited && !(p->statusflags & THROTTLE) &&
1451 MoxaPortRxQueue(p) > 0) { /* RX */
1452 MoxaPortReadData(p);
1453 tty_schedule_flip(tty);
1454 }
1455 } else {
1456 p->statusflags &= ~EMPTYWAIT;
1457 MoxaPortFlushData(p, 0); /* flush RX */
1da177e4 1458 }
0bcc4caa 1459
7bcf97d1
JS		 1460 if (!handle) /* nothing else to do */
1461 return 0;
1462
1463 intr = readw(ip); /* port irq status */
1464 if (intr == 0)
1465 return 0;
1466
1467 writew(0, ip); /* ACK port */
1468 ofsAddr = p->tableAddr;
1469 if (intr & IntrTx) /* disable tx intr */
1470 writew(readw(ofsAddr + HostStat) & ~WakeupTx,
1471 ofsAddr + HostStat);
1472
1473 if (!inited)
1474 return 0;
1475
1476 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
1477 tty_insert_flip_char(tty, 0, TTY_BREAK);
1478 tty_schedule_flip(tty);
1479 }
1480
1481 if (intr & IntrLine)
1482 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
1483
1484 return 0;
1485}
1486
1487static void moxa_poll(unsigned long ignored)
1488{
1489 struct moxa_board_conf *brd;
1490 u16 __iomem *ip;
2a541341 1491 unsigned int card, port, served = 0;
7bcf97d1
JS		 1492
1493 spin_lock(&moxa_lock);
1da177e4 1494 for (card = 0; card < MAX_BOARDS; card++) {
7bcf97d1
JS		 1495 brd = &moxa_boards[card];
1496 if (!brd->ready)
1da177e4 1497 continue;
7bcf97d1 1498
2a541341
JS		 1499 served++;
1500
7bcf97d1
JS		 1501 ip = NULL;
1502 if (readb(brd->intPend) == 0xff)
1503 ip = brd->intTable + readb(brd->intNdx);
1504
1505 for (port = 0; port < brd->numPorts; port++)
1506 moxa_poll_port(&brd->ports[port], !!ip, ip + port);
1507
1508 if (ip)
1509 writeb(0, brd->intPend); /* ACK */
1510
1511 if (moxaLowWaterChk) {
1512 struct moxa_port *p = brd->ports;
1513 for (port = 0; port < brd->numPorts; port++, p++)
1514 if (p->lowChkFlag) {
1515 p->lowChkFlag = 0;
1516 moxa_low_water_check(p->tableAddr);
1da177e4 1517 }
1da177e4
LT		 1518 }
1519 }
7bcf97d1 1520 moxaLowWaterChk = 0;
1da177e4 1521
2a541341
JS		 1522 if (served)
1523 mod_timer(&moxaTimer, jiffies + HZ / 50);
1524 spin_unlock(&moxa_lock);
1da177e4
LT		 1525}
1526
1527/******************************************************************************/
1528
db1acaa6 1529static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4 1530{
eaa95a8d
JS		 1531 register struct ktermios *ts = tty->termios;
1532 struct moxa_port *ch = tty->driver_data;
db1acaa6 1533 int rts, cts, txflow, rxflow, xany, baud;
1da177e4 1534
1da177e4
LT		 1535 rts = cts = txflow = rxflow = xany = 0;
1536 if (ts->c_cflag & CRTSCTS)
1537 rts = cts = 1;
1538 if (ts->c_iflag & IXON)
1539 txflow = 1;
1540 if (ts->c_iflag & IXOFF)
1541 rxflow = 1;
1542 if (ts->c_iflag & IXANY)
1543 xany = 1;
db1acaa6
AC		 1544
1545 /* Clear the features we don't support */
1546 ts->c_cflag &= ~CMSPAR;
b4173f45
JS		 1547 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1548 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
db1acaa6
AC		 1549 if (baud == -1)
1550 baud = tty_termios_baud_rate(old_termios);
1551 /* Not put the baud rate into the termios data */
1552 tty_encode_baud_rate(tty, baud, baud);
1da177e4
LT		 1553}
1554
6f56b658 1555static void moxa_setup_empty_event(struct tty_struct *tty)
1da177e4 1556{
8f8ecbad 1557 struct moxa_port *ch = tty->driver_data;
1da177e4 1558
7bcf97d1 1559 spin_lock_bh(&moxa_lock);
1da177e4 1560 ch->statusflags |= EMPTYWAIT;
7bcf97d1 1561 spin_unlock_bh(&moxa_lock);
1da177e4
LT		 1562}
1563
6f56b658 1564static void moxa_shut_down(struct moxa_port *ch)
1da177e4 1565{
9de6a51f 1566 struct tty_struct *tp = ch->port.tty;
1da177e4 1567
9de6a51f 1568 if (!(ch->port.flags & ASYNC_INITIALIZED))
1da177e4
LT		 1569 return;
1570
b4173f45 1571 MoxaPortDisable(ch);
1da177e4
LT		 1572
1573 /*
1574 * If we're a modem control device and HUPCL is on, drop RTS & DTR.
1575 */
a8f5cda0 1576 if (C_HUPCL(tp))
b4173f45 1577 MoxaPortLineCtrl(ch, 0, 0);
1da177e4 1578
a8f5cda0 1579 spin_lock_bh(&moxa_lock);
9de6a51f 1580 ch->port.flags &= ~ASYNC_INITIALIZED;
a8f5cda0 1581 spin_unlock_bh(&moxa_lock);
1da177e4
LT		 1582}
1583
1da177e4
LT		 1584/*****************************************************************************
1585 * Driver level functions: *
1da177e4 1586 *****************************************************************************/
1da177e4 1587
b4173f45 1588static void MoxaPortFlushData(struct moxa_port *port, int mode)
1da177e4
LT		 1589{
1590 void __iomem *ofsAddr;
eaa95a8d 1591 if (mode < 0 || mode > 2)
1da177e4 1592 return;
b4173f45 1593 ofsAddr = port->tableAddr;
1da177e4
LT		 1594 moxafunc(ofsAddr, FC_FlushQueue, mode);
1595 if (mode != 1) {
b4173f45 1596 port->lowChkFlag = 0;
6f56b658 1597 moxa_low_water_check(ofsAddr);
1da177e4
LT		 1598 }
1599}
1600
1da177e4
LT		 1601/*
1602 * Moxa Port Number Description:
1603 *
1604 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1605 * the port number using in MOXA driver functions will be 0 to 31 for
1606 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1607 * to 127 for fourth. For example, if you setup three MOXA boards,
1608 * first board is C218, second board is C320-16 and third board is
1609 * C320-32. The port number of first board (C218 - 8 ports) is from
1610 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1611 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1612 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1613 * 127 will be invalid.
1614 *
1615 *
1616 * Moxa Functions Description:
1617 *
1618 * Function 1: Driver initialization routine, this routine must be
1619 * called when initialized driver.
1620 * Syntax:
1621 * void MoxaDriverInit();
1622 *
1623 *
1624 * Function 2: Moxa driver private IOCTL command processing.
1625 * Syntax:
1626 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1627 *
1628 * unsigned int cmd : IOCTL command
1629 * unsigned long arg : IOCTL argument
1630 * int port : port number (0 - 127)
1631 *
1632 * return: 0 (OK)
1633 * -EINVAL
1634 * -ENOIOCTLCMD
1635 *
1636 *
1da177e4
LT		 1637 * Function 6: Enable this port to start Tx/Rx data.
1638 * Syntax:
1639 * void MoxaPortEnable(int port);
1640 * int port : port number (0 - 127)
1641 *
1642 *
1643 * Function 7: Disable this port
1644 * Syntax:
1645 * void MoxaPortDisable(int port);
1646 * int port : port number (0 - 127)
1647 *
1648 *
1da177e4
LT		 1649 * Function 10: Setting baud rate of this port.
1650 * Syntax:
08d01c79 1651 * speed_t MoxaPortSetBaud(int port, speed_t baud);
1da177e4
LT		 1652 * int port : port number (0 - 127)
1653 * long baud : baud rate (50 - 115200)
1654 *
1655 * return: 0 : this port is invalid or baud < 50
1656 * 50 - 115200 : the real baud rate set to the port, if
1657 * the argument baud is large than maximun
1658 * available baud rate, the real setting
1659 * baud rate will be the maximun baud rate.
1660 *
1661 *
1da177e4
LT		 1662 * Function 12: Configure the port.
1663 * Syntax:
606d099c 1664 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1da177e4 1665 * int port : port number (0 - 127)
606d099c 1666 * struct ktermios * termio : termio structure pointer
c7bce309 1667 * speed_t baud : baud rate
1da177e4
LT		 1668 *
1669 * return: -1 : this port is invalid or termio == NULL
1670 * 0 : setting O.K.
1671 *
1672 *
1673 * Function 13: Get the DTR/RTS state of this port.
1674 * Syntax:
1675 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1676 * int port : port number (0 - 127)
1677 * int * dtrState : pointer to INT to receive the current DTR
1678 * state. (if NULL, this function will not
1679 * write to this address)
1680 * int * rtsState : pointer to INT to receive the current RTS
1681 * state. (if NULL, this function will not
1682 * write to this address)
1683 *
1684 * return: -1 : this port is invalid
1685 * 0 : O.K.
1686 *
1687 *
1688 * Function 14: Setting the DTR/RTS output state of this port.
1689 * Syntax:
1690 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1691 * int port : port number (0 - 127)
1692 * int dtrState : DTR output state (0: off, 1: on)
1693 * int rtsState : RTS output state (0: off, 1: on)
1694 *
1695 *
1696 * Function 15: Setting the flow control of this port.
1697 * Syntax:
1698 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1699 * int txFlow,int xany);
1700 * int port : port number (0 - 127)
1701 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1702 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1703 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1704 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1705 * int xany : S/W XANY flow control (0: no, 1: yes)
1706 *
1707 *
1708 * Function 16: Get ths line status of this port
1709 * Syntax:
1710 * int MoxaPortLineStatus(int port);
1711 * int port : port number (0 - 127)
1712 *
1713 * return: Bit 0 - CTS state (0: off, 1: on)
1714 * Bit 1 - DSR state (0: off, 1: on)
1715 * Bit 2 - DCD state (0: off, 1: on)
1716 *
1717 *
1da177e4
LT		 1718 * Function 19: Flush the Rx/Tx buffer data of this port.
1719 * Syntax:
1720 * void MoxaPortFlushData(int port, int mode);
1721 * int port : port number (0 - 127)
1722 * int mode
1723 * 0 : flush the Rx buffer
1724 * 1 : flush the Tx buffer
1725 * 2 : flush the Rx and Tx buffer
1726 *
1727 *
1728 * Function 20: Write data.
1729 * Syntax:
1730 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1731 * int port : port number (0 - 127)
1732 * unsigned char * buffer : pointer to write data buffer.
1733 * int length : write data length
1734 *
1735 * return: 0 - length : real write data length
1736 *
1737 *
1738 * Function 21: Read data.
1739 * Syntax:
33f0f88f 1740 * int MoxaPortReadData(int port, struct tty_struct *tty);
1da177e4 1741 * int port : port number (0 - 127)
33f0f88f 1742 * struct tty_struct *tty : tty for data
1da177e4
LT		 1743 *
1744 * return: 0 - length : real read data length
1745 *
1746 *
1da177e4
LT		 1747 * Function 24: Get the Tx buffer current queued data bytes
1748 * Syntax:
1749 * int MoxaPortTxQueue(int port);
1750 * int port : port number (0 - 127)
1751 *
1752 * return: .. : Tx buffer current queued data bytes
1753 *
1754 *
1755 * Function 25: Get the Tx buffer current free space
1756 * Syntax:
1757 * int MoxaPortTxFree(int port);
1758 * int port : port number (0 - 127)
1759 *
1760 * return: .. : Tx buffer current free space
1761 *
1762 *
1763 * Function 26: Get the Rx buffer current queued data bytes
1764 * Syntax:
1765 * int MoxaPortRxQueue(int port);
1766 * int port : port number (0 - 127)
1767 *
1768 * return: .. : Rx buffer current queued data bytes
1769 *
1770 *
1da177e4
LT		 1771 * Function 28: Disable port data transmission.
1772 * Syntax:
1773 * void MoxaPortTxDisable(int port);
1774 * int port : port number (0 - 127)
1775 *
1776 *
1777 * Function 29: Enable port data transmission.
1778 * Syntax:
1779 * void MoxaPortTxEnable(int port);
1780 * int port : port number (0 - 127)
1781 *
1782 *
1da177e4
LT		 1783 * Function 31: Get the received BREAK signal count and reset it.
1784 * Syntax:
1785 * int MoxaPortResetBrkCnt(int port);
1786 * int port : port number (0 - 127)
1787 *
1788 * return: 0 - .. : BREAK signal count
1789 *
1790 *
1da177e4 1791 */
1da177e4 1792
b4173f45 1793static void MoxaPortEnable(struct moxa_port *port)
1da177e4
LT		 1794{
1795 void __iomem *ofsAddr;
eaa95a8d 1796 u16 lowwater = 512;
1da177e4 1797
b4173f45 1798 ofsAddr = port->tableAddr;
1da177e4 1799 writew(lowwater, ofsAddr + Low_water);
08d01c79 1800 if (MOXA_IS_320(port->board))
1da177e4 1801 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
eaa95a8d
JS		 1802 else
1803 writew(readw(ofsAddr + HostStat) | WakeupBreak,
1804 ofsAddr + HostStat);
1da177e4
LT		 1805
1806 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
1807 moxafunc(ofsAddr, FC_FlushQueue, 2);
1808
1809 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
1810 MoxaPortLineStatus(port);
1811}
1812
b4173f45 1813static void MoxaPortDisable(struct moxa_port *port)
1da177e4 1814{
b4173f45 1815 void __iomem *ofsAddr = port->tableAddr;
1da177e4
LT		 1816
1817 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
1818 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
1819 writew(0, ofsAddr + HostStat);
1820 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
1821}
1822
08d01c79 1823static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
1da177e4 1824{
08d01c79
JS		 1825 void __iomem *ofsAddr = port->tableAddr;
1826 unsigned int clock, val;
1827 speed_t max;
1da177e4 1828
08d01c79
JS		 1829 max = MOXA_IS_320(port->board) ? 460800 : 921600;
1830 if (baud < 50)
eaa95a8d 1831 return 0;
1da177e4
LT		 1832 if (baud > max)
1833 baud = max;
08d01c79 1834 clock = 921600;
1da177e4
LT		 1835 val = clock / baud;
1836 moxafunc(ofsAddr, FC_SetBaud, val);
1837 baud = clock / val;
eaa95a8d 1838 return baud;
1da177e4
LT		 1839}
1840
b4173f45
JS		 1841static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
1842 speed_t baud)
1da177e4
LT		 1843{
1844 void __iomem *ofsAddr;
1845 tcflag_t cflag;
1da177e4
LT		 1846 tcflag_t mode = 0;
1847
b4173f45 1848 ofsAddr = port->tableAddr;
1da177e4
LT		 1849 cflag = termio->c_cflag; /* termio->c_cflag */
1850
1851 mode = termio->c_cflag & CSIZE;
1852 if (mode == CS5)
1853 mode = MX_CS5;
1854 else if (mode == CS6)
1855 mode = MX_CS6;
1856 else if (mode == CS7)
1857 mode = MX_CS7;
1858 else if (mode == CS8)
1859 mode = MX_CS8;
1860
1861 if (termio->c_cflag & CSTOPB) {
1862 if (mode == MX_CS5)
1863 mode |= MX_STOP15;
1864 else
1865 mode |= MX_STOP2;
1866 } else
1867 mode |= MX_STOP1;
1868
1869 if (termio->c_cflag & PARENB) {
1870 if (termio->c_cflag & PARODD)
1871 mode |= MX_PARODD;
1872 else
1873 mode |= MX_PAREVEN;
1874 } else
1875 mode |= MX_PARNONE;
1876
eaa95a8d 1877 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
1da177e4 1878
08d01c79
JS		 1879 if (MOXA_IS_320(port->board) && baud >= 921600)
1880 return -1;
1881
db1acaa6 1882 baud = MoxaPortSetBaud(port, baud);
1da177e4
LT		 1883
1884 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
1885 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
1886 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
1887 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
6f56b658 1888 moxa_wait_finish(ofsAddr);
1da177e4
LT		 1889
1890 }
eaa95a8d 1891 return baud;
1da177e4
LT		 1892}
1893
b4173f45
JS		 1894static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
1895 int *rtsState)
1da177e4 1896{
b4173f45
JS		 1897 if (dtrState)
1898 *dtrState = !!(port->lineCtrl & DTR_ON);
1899 if (rtsState)
1900 *rtsState = !!(port->lineCtrl & RTS_ON);
1901
eaa95a8d 1902 return 0;
1da177e4
LT		 1903}
1904
b4173f45 1905static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
1da177e4 1906{
eaa95a8d 1907 u8 mode = 0;
1da177e4 1908
1da177e4
LT		 1909 if (dtr)
1910 mode |= DTR_ON;
1911 if (rts)
1912 mode |= RTS_ON;
b4173f45
JS		 1913 port->lineCtrl = mode;
1914 moxafunc(port->tableAddr, FC_LineControl, mode);
1da177e4
LT		 1915}
1916
b4173f45
JS		 1917static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
1918 int txflow, int rxflow, int txany)
1da177e4 1919{
b4173f45 1920 int mode = 0;
1da177e4 1921
1da177e4
LT		 1922 if (rts)
1923 mode |= RTS_FlowCtl;
1924 if (cts)
1925 mode |= CTS_FlowCtl;
1926 if (txflow)
1927 mode |= Tx_FlowCtl;
1928 if (rxflow)
1929 mode |= Rx_FlowCtl;
1930 if (txany)
1931 mode |= IXM_IXANY;
b4173f45 1932 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
1da177e4
LT		 1933}
1934
b4173f45 1935static int MoxaPortLineStatus(struct moxa_port *port)
1da177e4
LT		 1936{
1937 void __iomem *ofsAddr;
1938 int val;
1939
b4173f45 1940 ofsAddr = port->tableAddr;
08d01c79 1941 if (MOXA_IS_320(port->board)) {
1da177e4
LT		 1942 moxafunc(ofsAddr, FC_LineStatus, 0);
1943 val = readw(ofsAddr + FuncArg);
1944 } else {
1945 val = readw(ofsAddr + FlagStat) >> 4;
1946 }
1947 val &= 0x0B;
7bcf97d1 1948 if (val & 8)
1da177e4 1949 val |= 4;
a8f5cda0 1950 spin_lock_bh(&moxa_lock);
7bcf97d1 1951 moxa_new_dcdstate(port, val & 8);
a8f5cda0 1952 spin_unlock_bh(&moxa_lock);
1da177e4 1953 val &= 7;
7bcf97d1 1954 return val;
1da177e4
LT		 1955}
1956
2108eba5
JS		 1957static int MoxaPortWriteData(struct moxa_port *port,
1958 const unsigned char *buffer, int len)
1da177e4 1959{
1da177e4 1960 void __iomem *baseAddr, *ofsAddr, *ofs;
2108eba5
JS		 1961 unsigned int c, total;
1962 u16 head, tail, tx_mask, spage, epage;
1963 u16 pageno, pageofs, bufhead;
1da177e4 1964
b4173f45
JS		 1965 ofsAddr = port->tableAddr;
1966 baseAddr = port->board->basemem;
1da177e4
LT		 1967 tx_mask = readw(ofsAddr + TX_mask);
1968 spage = readw(ofsAddr + Page_txb);
1969 epage = readw(ofsAddr + EndPage_txb);
1970 tail = readw(ofsAddr + TXwptr);
1971 head = readw(ofsAddr + TXrptr);
2108eba5 1972 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
1da177e4
LT		 1973 if (c > len)
1974 c = len;
9de6a51f 1975 moxaLog.txcnt[port->port.tty->index] += c;
1da177e4
LT		 1976 total = c;
1977 if (spage == epage) {
1978 bufhead = readw(ofsAddr + Ofs_txb);
1979 writew(spage, baseAddr + Control_reg);
1980 while (c > 0) {
1981 if (head > tail)
1982 len = head - tail - 1;
1983 else
1984 len = tx_mask + 1 - tail;
1985 len = (c > len) ? len : c;
1986 ofs = baseAddr + DynPage_addr + bufhead + tail;
2108eba5
JS		 1987 memcpy_toio(ofs, buffer, len);
1988 buffer += len;
1da177e4
LT		 1989 tail = (tail + len) & tx_mask;
1990 c -= len;
1991 }
1da177e4 1992 } else {
1da177e4
LT		 1993 pageno = spage + (tail >> 13);
1994 pageofs = tail & Page_mask;
2108eba5
JS		 1995 while (c > 0) {
1996 len = Page_size - pageofs;
1997 if (len > c)
1998 len = c;
1da177e4
LT		 1999 writeb(pageno, baseAddr + Control_reg);
2000 ofs = baseAddr + DynPage_addr + pageofs;
2108eba5
JS		 2001 memcpy_toio(ofs, buffer, len);
2002 buffer += len;
1da177e4
LT		 2003 if (++pageno == epage)
2004 pageno = spage;
2005 pageofs = 0;
2108eba5
JS		 2006 c -= len;
2007 }
2008 tail = (tail + total) & tx_mask;
1da177e4 2009 }
2108eba5 2010 writew(tail, ofsAddr + TXwptr);
1da177e4 2011 writeb(1, ofsAddr + CD180TXirq); /* start to send */
2108eba5 2012 return total;
1da177e4
LT		 2013}
2014
7bcf97d1 2015static int MoxaPortReadData(struct moxa_port *port)
1da177e4 2016{
9de6a51f 2017 struct tty_struct *tty = port->port.tty;
2108eba5 2018 unsigned char *dst;
1da177e4 2019 void __iomem *baseAddr, *ofsAddr, *ofs;
2108eba5
JS		 2020 unsigned int count, len, total;
2021 u16 tail, rx_mask, spage, epage;
2022 u16 pageno, pageofs, bufhead, head;
1da177e4 2023
b4173f45
JS		 2024 ofsAddr = port->tableAddr;
2025 baseAddr = port->board->basemem;
1da177e4
LT		 2026 head = readw(ofsAddr + RXrptr);
2027 tail = readw(ofsAddr + RXwptr);
2028 rx_mask = readw(ofsAddr + RX_mask);
2029 spage = readw(ofsAddr + Page_rxb);
2030 epage = readw(ofsAddr + EndPage_rxb);
2108eba5 2031 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
1da177e4 2032 if (count == 0)
33f0f88f 2033 return 0;
1da177e4 2034
33f0f88f 2035 total = count;
7bcf97d1 2036 moxaLog.rxcnt[tty->index] += total;
1da177e4
LT		 2037 if (spage == epage) {
2038 bufhead = readw(ofsAddr + Ofs_rxb);
2039 writew(spage, baseAddr + Control_reg);
2040 while (count > 0) {
1da177e4 2041 ofs = baseAddr + DynPage_addr + bufhead + head;
2108eba5
JS		 2042 len = (tail >= head) ? (tail - head) :
2043 (rx_mask + 1 - head);
2044 len = tty_prepare_flip_string(tty, &dst,
2045 min(len, count));
2046 memcpy_fromio(dst, ofs, len);
1da177e4
LT		 2047 head = (head + len) & rx_mask;
2048 count -= len;
2049 }
1da177e4 2050 } else {
1da177e4
LT		 2051 pageno = spage + (head >> 13);
2052 pageofs = head & Page_mask;
2108eba5 2053 while (count > 0) {
1da177e4
LT		 2054 writew(pageno, baseAddr + Control_reg);
2055 ofs = baseAddr + DynPage_addr + pageofs;
2108eba5
JS		 2056 len = tty_prepare_flip_string(tty, &dst,
2057 min(Page_size - pageofs, count));
2058 memcpy_fromio(dst, ofs, len);
2059
2060 count -= len;
2061 pageofs = (pageofs + len) & Page_mask;
2062 if (pageofs == 0 && ++pageno == epage)
1da177e4 2063 pageno = spage;
2108eba5
JS		 2064 }
2065 head = (head + total) & rx_mask;
1da177e4 2066 }
2108eba5
JS		 2067 writew(head, ofsAddr + RXrptr);
2068 if (readb(ofsAddr + FlagStat) & Xoff_state) {
1da177e4 2069 moxaLowWaterChk = 1;
b4173f45 2070 port->lowChkFlag = 1;
1da177e4 2071 }
2108eba5 2072 return total;
1da177e4
LT		 2073}
2074
2075
b4173f45 2076static int MoxaPortTxQueue(struct moxa_port *port)
1da177e4 2077{
b4173f45 2078 void __iomem *ofsAddr = port->tableAddr;
2108eba5 2079 u16 rptr, wptr, mask;
1da177e4 2080
1da177e4
LT		 2081 rptr = readw(ofsAddr + TXrptr);
2082 wptr = readw(ofsAddr + TXwptr);
2083 mask = readw(ofsAddr + TX_mask);
2108eba5 2084 return (wptr - rptr) & mask;
1da177e4
LT		 2085}
2086
b4173f45 2087static int MoxaPortTxFree(struct moxa_port *port)
1da177e4 2088{
b4173f45 2089 void __iomem *ofsAddr = port->tableAddr;
2108eba5 2090 u16 rptr, wptr, mask;
1da177e4 2091
1da177e4
LT		 2092 rptr = readw(ofsAddr + TXrptr);
2093 wptr = readw(ofsAddr + TXwptr);
2094 mask = readw(ofsAddr + TX_mask);
2108eba5 2095 return mask - ((wptr - rptr) & mask);
1da177e4
LT		 2096}
2097
b4173f45 2098static int MoxaPortRxQueue(struct moxa_port *port)
1da177e4 2099{
b4173f45 2100 void __iomem *ofsAddr = port->tableAddr;
2108eba5 2101 u16 rptr, wptr, mask;
1da177e4 2102
1da177e4
LT		 2103 rptr = readw(ofsAddr + RXrptr);
2104 wptr = readw(ofsAddr + RXwptr);
2105 mask = readw(ofsAddr + RX_mask);
2108eba5 2106 return (wptr - rptr) & mask;
1da177e4
LT		 2107}
2108
b4173f45 2109static void MoxaPortTxDisable(struct moxa_port *port)
1da177e4 2110{
b4173f45 2111 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
1da177e4
LT		 2112}
2113
b4173f45 2114static void MoxaPortTxEnable(struct moxa_port *port)
1da177e4 2115{
b4173f45 2116 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
1da177e4
LT		 2117}
2118
8f8ecbad 2119static int moxa_get_serial_info(struct moxa_port *info,
eaa95a8d 2120 struct serial_struct __user *retinfo)
1da177e4 2121{
eaa95a8d
JS		 2122 struct serial_struct tmp = {
2123 .type = info->type,
9de6a51f
AC		 2124 .line = info->port.tty->index,
2125 .flags = info->port.flags,
eaa95a8d
JS		 2126 .baud_base = 921600,
2127 .close_delay = info->close_delay
2128 };
2129 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
1da177e4
LT		 2130}
2131
2132
8f8ecbad 2133static int moxa_set_serial_info(struct moxa_port *info,
eaa95a8d 2134 struct serial_struct __user *new_info)
1da177e4
LT		 2135{
2136 struct serial_struct new_serial;
2137
eaa95a8d 2138 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1da177e4
LT		 2139 return -EFAULT;
2140
eaa95a8d
JS		 2141 if (new_serial.irq != 0 || new_serial.port != 0 ||
2142 new_serial.custom_divisor != 0 ||
2143 new_serial.baud_base != 921600)
2144 return -EPERM;
1da177e4
LT		 2145
2146 if (!capable(CAP_SYS_ADMIN)) {
2147 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
9de6a51f 2148 (info->port.flags & ~ASYNC_USR_MASK)))
eaa95a8d
JS		 2149 return -EPERM;
2150 } else
1da177e4 2151 info->close_delay = new_serial.close_delay * HZ / 100;
1da177e4
LT		 2152
2153 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
9de6a51f 2154 new_serial.flags |= (info->port.flags & ASYNC_FLAGS);
1da177e4 2155
eaa95a8d 2156 MoxaSetFifo(info, new_serial.type == PORT_16550A);
1da177e4
LT		 2157
2158 info->type = new_serial.type;
eaa95a8d 2159 return 0;
1da177e4
LT		 2160}
2161
2162
2163
2164/*****************************************************************************
2165 * Static local functions: *
2166 *****************************************************************************/
1da177e4 2167
b4173f45 2168static void MoxaSetFifo(struct moxa_port *port, int enable)
1da177e4 2169{
b4173f45 2170 void __iomem *ofsAddr = port->tableAddr;
1da177e4
LT		 2171
2172 if (!enable) {
2173 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2174 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2175 } else {
2176 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2177 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
2178 }
2179}
Linux kernel - Deliverables
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