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TTY: moxa, convert to dynamic device
[deliverable/linux.git] / drivers / tty / 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>
5a0e3ad6 46#include <linux/slab.h>
5a3c6b25 47#include <linux/ratelimit.h>
1da177e4 48
1da177e4
LT		 49#include <asm/io.h>
50#include <asm/uaccess.h>
51
03718234
JS		 52#include "moxa.h"
53
b9705b60 54#define MOXA_VERSION "6.0k"
1da177e4 55
03718234
JS		 56#define MOXA_FW_HDRLEN 32
57
11324edd 58#define MOXAMAJOR 172
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 63
08d01c79
JS		 64#define MOXA_IS_320(brd) ((brd)->boardType == MOXA_BOARD_C320_ISA || \
65 (brd)->boardType == MOXA_BOARD_C320_PCI)
66
1da177e4
LT		 67/*
68 * Define the Moxa PCI vendor and device IDs.
69 */
11324edd
JS		 70#define MOXA_BUS_TYPE_ISA 0
71#define MOXA_BUS_TYPE_PCI 1
1da177e4 72
1da177e4
LT		 73enum {
74 MOXA_BOARD_C218_PCI = 1,
75 MOXA_BOARD_C218_ISA,
76 MOXA_BOARD_C320_PCI,
77 MOXA_BOARD_C320_ISA,
78 MOXA_BOARD_CP204J,
79};
80
81static char *moxa_brdname[] =
82{
83 "C218 Turbo PCI series",
84 "C218 Turbo ISA series",
85 "C320 Turbo PCI series",
86 "C320 Turbo ISA series",
87 "CP-204J series",
88};
89
90#ifdef CONFIG_PCI
91static struct pci_device_id moxa_pcibrds[] = {
5ebb4078
JS		 92 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218),
93 .driver_data = MOXA_BOARD_C218_PCI },
94 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320),
95 .driver_data = MOXA_BOARD_C320_PCI },
96 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J),
97 .driver_data = MOXA_BOARD_CP204J },
1da177e4
LT		 98 { 0 }
99};
100MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
101#endif /* CONFIG_PCI */
102
03718234
JS		 103struct moxa_port;
104
8f8ecbad 105static struct moxa_board_conf {
1da177e4
LT		 106 int boardType;
107 int numPorts;
1da177e4 108 int busType;
8f8ecbad 109
810ab09b 110 unsigned int ready;
8f8ecbad 111
03718234
JS		 112 struct moxa_port *ports;
113
8f8ecbad
JS		 114 void __iomem *basemem;
115 void __iomem *intNdx;
116 void __iomem *intPend;
117 void __iomem *intTable;
118} moxa_boards[MAX_BOARDS];
119
120struct mxser_mstatus {
121 tcflag_t cflag;
122 int cts;
123 int dsr;
124 int ri;
125 int dcd;
9dff89cd 126};
1da177e4 127
8f8ecbad
JS		 128struct moxaq_str {
129 int inq;
130 int outq;
131};
1da177e4 132
8f8ecbad 133struct moxa_port {
9de6a51f 134 struct tty_port port;
b4173f45 135 struct moxa_board_conf *board;
7bcf97d1
JS		 136 void __iomem *tableAddr;
137
1da177e4 138 int type;
1da177e4 139 int cflag;
7bcf97d1 140 unsigned long statusflags;
1da177e4 141
8482bcd5 142 u8 DCDState; /* Protected by the port lock */
7bcf97d1
JS		 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 153/* statusflags */
a808ac0c
AC		 154#define TXSTOPPED 1
155#define LOWWAIT 2
156#define EMPTYWAIT 3
1da177e4 157
1da177e4
LT		 158#define SERIAL_DO_RESTART
159
1da177e4
LT		 160#define WAKEUP_CHARS 256
161
1da177e4 162static int ttymajor = MOXAMAJOR;
74d7d97b
JS		 163static struct mon_str moxaLog;
164static unsigned int moxaFuncTout = HZ / 2;
7bcf97d1 165static unsigned int moxaLowWaterChk;
a8f5cda0 166static DEFINE_MUTEX(moxa_openlock);
e8c62103 167static DEFINE_SPINLOCK(moxa_lock);
c6fc826e 168
d353eca4
JS		 169static unsigned long baseaddr[MAX_BOARDS];
170static unsigned int type[MAX_BOARDS];
171static unsigned int numports[MAX_BOARDS];
793be898 172static struct tty_port moxa_service_port;
1da177e4
LT		 173
174MODULE_AUTHOR("William Chen");
175MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
176MODULE_LICENSE("GPL");
e6c4ef98
BH		 177MODULE_FIRMWARE("c218tunx.cod");
178MODULE_FIRMWARE("cp204unx.cod");
179MODULE_FIRMWARE("c320tunx.cod");
c6fc826e 180
d353eca4
JS		 181module_param_array(type, uint, NULL, 0);
182MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
183module_param_array(baseaddr, ulong, NULL, 0);
184MODULE_PARM_DESC(baseaddr, "base address");
185module_param_array(numports, uint, NULL, 0);
186MODULE_PARM_DESC(numports, "numports (ignored for C218)");
c6fc826e 187
1da177e4 188module_param(ttymajor, int, 0);
1da177e4 189
1da177e4
LT		 190/*
191 * static functions:
192 */
1da177e4
LT		 193static int moxa_open(struct tty_struct *, struct file *);
194static void moxa_close(struct tty_struct *, struct file *);
195static int moxa_write(struct tty_struct *, const unsigned char *, int);
196static int moxa_write_room(struct tty_struct *);
197static void moxa_flush_buffer(struct tty_struct *);
198static int moxa_chars_in_buffer(struct tty_struct *);
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 *);
60b33c13 203static int moxa_tiocmget(struct tty_struct *tty);
20b9d177 204static int moxa_tiocmset(struct tty_struct *tty,
1da177e4
LT		 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 *);
f176178b 208static void moxa_shutdown(struct tty_port *);
31f35939 209static int moxa_carrier_raised(struct tty_port *);
f176178b 210static void moxa_dtr_rts(struct tty_port *, int);
1da177e4
LT		 211/*
212 * moxa board interface functions:
213 */
b4173f45
JS		 214static void MoxaPortEnable(struct moxa_port *);
215static void MoxaPortDisable(struct moxa_port *);
216static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
217static int MoxaPortGetLineOut(struct moxa_port *, int *, int *);
218static void MoxaPortLineCtrl(struct moxa_port *, int, int);
219static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
220static int MoxaPortLineStatus(struct moxa_port *);
b4173f45 221static void MoxaPortFlushData(struct moxa_port *, int);
d450b5a0 222static int MoxaPortWriteData(struct tty_struct *, const unsigned char *, int);
7bcf97d1 223static int MoxaPortReadData(struct moxa_port *);
b4173f45
JS		 224static int MoxaPortTxQueue(struct moxa_port *);
225static int MoxaPortRxQueue(struct moxa_port *);
226static int MoxaPortTxFree(struct moxa_port *);
227static void MoxaPortTxDisable(struct moxa_port *);
228static void MoxaPortTxEnable(struct moxa_port *);
8f8ecbad
JS		 229static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *);
230static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *);
b4173f45 231static void MoxaSetFifo(struct moxa_port *port, int enable);
1da177e4 232
74d7d97b
JS		 233/*
234 * I/O functions
235 */
236
a808ac0c
AC		 237static DEFINE_SPINLOCK(moxafunc_lock);
238
74d7d97b
JS		 239static void moxa_wait_finish(void __iomem *ofsAddr)
240{
241 unsigned long end = jiffies + moxaFuncTout;
242
243 while (readw(ofsAddr + FuncCode) != 0)
244 if (time_after(jiffies, end))
245 return;
5a3c6b25
MZ		 246 if (readw(ofsAddr + FuncCode) != 0)
247 printk_ratelimited(KERN_WARNING "moxa function expired\n");
74d7d97b
JS		 248}
249
eaa95a8d 250static void moxafunc(void __iomem *ofsAddr, u16 cmd, u16 arg)
74d7d97b 251{
f5c5a36d
AC		 252 unsigned long flags;
253 spin_lock_irqsave(&moxafunc_lock, flags);
74d7d97b
JS		 254 writew(arg, ofsAddr + FuncArg);
255 writew(cmd, ofsAddr + FuncCode);
256 moxa_wait_finish(ofsAddr);
f5c5a36d
AC		 257 spin_unlock_irqrestore(&moxafunc_lock, flags);
258}
259
260static int moxafuncret(void __iomem *ofsAddr, u16 cmd, u16 arg)
261{
262 unsigned long flags;
263 u16 ret;
264 spin_lock_irqsave(&moxafunc_lock, flags);
265 writew(arg, ofsAddr + FuncArg);
266 writew(cmd, ofsAddr + FuncCode);
267 moxa_wait_finish(ofsAddr);
268 ret = readw(ofsAddr + FuncArg);
269 spin_unlock_irqrestore(&moxafunc_lock, flags);
270 return ret;
74d7d97b
JS		 271}
272
7bcf97d1
JS		 273static void moxa_low_water_check(void __iomem *ofsAddr)
274{
275 u16 rptr, wptr, mask, len;
276
277 if (readb(ofsAddr + FlagStat) & Xoff_state) {
278 rptr = readw(ofsAddr + RXrptr);
279 wptr = readw(ofsAddr + RXwptr);
280 mask = readw(ofsAddr + RX_mask);
281 len = (wptr - rptr) & mask;
282 if (len <= Low_water)
283 moxafunc(ofsAddr, FC_SendXon, 0);
284 }
285}
286
74d7d97b
JS		 287/*
288 * TTY operations
289 */
290
6caa76b7 291static int moxa_ioctl(struct tty_struct *tty,
74d7d97b
JS		 292 unsigned int cmd, unsigned long arg)
293{
294 struct moxa_port *ch = tty->driver_data;
295 void __user *argp = (void __user *)arg;
a8f5cda0 296 int status, ret = 0;
74d7d97b
JS		 297
298 if (tty->index == MAX_PORTS) {
299 if (cmd != MOXA_GETDATACOUNT && cmd != MOXA_GET_IOQUEUE &&
300 cmd != MOXA_GETMSTATUS)
301 return -EINVAL;
302 } else if (!ch)
303 return -ENODEV;
304
305 switch (cmd) {
306 case MOXA_GETDATACOUNT:
307 moxaLog.tick = jiffies;
a8f5cda0
JS		 308 if (copy_to_user(argp, &moxaLog, sizeof(moxaLog)))
309 ret = -EFAULT;
310 break;
74d7d97b
JS		 311 case MOXA_FLUSH_QUEUE:
312 MoxaPortFlushData(ch, arg);
a8f5cda0 313 break;
74d7d97b
JS		 314 case MOXA_GET_IOQUEUE: {
315 struct moxaq_str __user *argm = argp;
316 struct moxaq_str tmp;
317 struct moxa_port *p;
318 unsigned int i, j;
319
320 for (i = 0; i < MAX_BOARDS; i++) {
321 p = moxa_boards[i].ports;
322 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
323 memset(&tmp, 0, sizeof(tmp));
e8c62103 324 spin_lock_bh(&moxa_lock);
74d7d97b
JS		 325 if (moxa_boards[i].ready) {
326 tmp.inq = MoxaPortRxQueue(p);
327 tmp.outq = MoxaPortTxQueue(p);
328 }
e8c62103
AC		 329 spin_unlock_bh(&moxa_lock);
330 if (copy_to_user(argm, &tmp, sizeof(tmp)))
74d7d97b
JS		 331 return -EFAULT;
332 }
333 }
a8f5cda0 334 break;
74d7d97b
JS		 335 } case MOXA_GET_OQUEUE:
336 status = MoxaPortTxQueue(ch);
a8f5cda0
JS		 337 ret = put_user(status, (unsigned long __user *)argp);
338 break;
74d7d97b
JS		 339 case MOXA_GET_IQUEUE:
340 status = MoxaPortRxQueue(ch);
a8f5cda0
JS		 341 ret = put_user(status, (unsigned long __user *)argp);
342 break;
74d7d97b
JS		 343 case MOXA_GETMSTATUS: {
344 struct mxser_mstatus __user *argm = argp;
345 struct mxser_mstatus tmp;
346 struct moxa_port *p;
347 unsigned int i, j;
348
349 for (i = 0; i < MAX_BOARDS; i++) {
350 p = moxa_boards[i].ports;
351 for (j = 0; j < MAX_PORTS_PER_BOARD; j++, p++, argm++) {
d450b5a0 352 struct tty_struct *ttyp;
74d7d97b 353 memset(&tmp, 0, sizeof(tmp));
e8c62103
AC		 354 spin_lock_bh(&moxa_lock);
355 if (!moxa_boards[i].ready) {
356 spin_unlock_bh(&moxa_lock);
74d7d97b 357 goto copy;
e8c62103 358 }
74d7d97b
JS		 359
360 status = MoxaPortLineStatus(p);
e8c62103
AC		 361 spin_unlock_bh(&moxa_lock);
362
74d7d97b
JS		 363 if (status & 1)
364 tmp.cts = 1;
365 if (status & 2)
366 tmp.dsr = 1;
367 if (status & 4)
368 tmp.dcd = 1;
369
d450b5a0 370 ttyp = tty_port_tty_get(&p->port);
adc8d746 371 if (!ttyp)
74d7d97b
JS		 372 tmp.cflag = p->cflag;
373 else
adc8d746 374 tmp.cflag = ttyp->termios.c_cflag;
df43daaa 375 tty_kref_put(ttyp);
74d7d97b 376copy:
e8c62103 377 if (copy_to_user(argm, &tmp, sizeof(tmp)))
74d7d97b
JS		 378 return -EFAULT;
379 }
380 }
a8f5cda0 381 break;
74d7d97b
JS		 382 }
383 case TIOCGSERIAL:
a808ac0c 384 mutex_lock(&ch->port.mutex);
a8f5cda0 385 ret = moxa_get_serial_info(ch, argp);
a808ac0c 386 mutex_unlock(&ch->port.mutex);
a8f5cda0 387 break;
74d7d97b 388 case TIOCSSERIAL:
a808ac0c 389 mutex_lock(&ch->port.mutex);
a8f5cda0 390 ret = moxa_set_serial_info(ch, argp);
a808ac0c 391 mutex_unlock(&ch->port.mutex);
a8f5cda0
JS		 392 break;
393 default:
394 ret = -ENOIOCTLCMD;
74d7d97b 395 }
a8f5cda0 396 return ret;
74d7d97b
JS		 397}
398
9e98966c 399static int moxa_break_ctl(struct tty_struct *tty, int state)
74d7d97b
JS		 400{
401 struct moxa_port *port = tty->driver_data;
402
403 moxafunc(port->tableAddr, state ? FC_SendBreak : FC_StopBreak,
404 Magic_code);
9e98966c 405 return 0;
74d7d97b
JS		 406}
407
b68e31d0 408static const struct tty_operations moxa_ops = {
1da177e4
LT		 409 .open = moxa_open,
410 .close = moxa_close,
411 .write = moxa_write,
412 .write_room = moxa_write_room,
413 .flush_buffer = moxa_flush_buffer,
414 .chars_in_buffer = moxa_chars_in_buffer,
1da177e4 415 .ioctl = moxa_ioctl,
1da177e4
LT		 416 .set_termios = moxa_set_termios,
417 .stop = moxa_stop,
418 .start = moxa_start,
419 .hangup = moxa_hangup,
74d7d97b 420 .break_ctl = moxa_break_ctl,
1da177e4
LT		 421 .tiocmget = moxa_tiocmget,
422 .tiocmset = moxa_tiocmset,
423};
424
31f35939
AC		 425static const struct tty_port_operations moxa_port_ops = {
426 .carrier_raised = moxa_carrier_raised,
f176178b
AC		 427 .dtr_rts = moxa_dtr_rts,
428 .shutdown = moxa_shutdown,
31f35939
AC		 429};
430
aa7e5221 431static struct tty_driver *moxaDriver;
aa7e5221 432static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
33f0f88f 433
74d7d97b
JS		 434/*
435 * HW init
436 */
437
03718234
JS		 438static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
439{
440 switch (brd->boardType) {
441 case MOXA_BOARD_C218_ISA:
442 case MOXA_BOARD_C218_PCI:
443 if (model != 1)
444 goto err;
445 break;
446 case MOXA_BOARD_CP204J:
447 if (model != 3)
448 goto err;
449 break;
450 default:
451 if (model != 2)
452 goto err;
453 break;
454 }
455 return 0;
456err:
457 return -EINVAL;
458}
459
460static int moxa_check_fw(const void *ptr)
461{
462 const __le16 *lptr = ptr;
463
464 if (*lptr != cpu_to_le16(0x7980))
465 return -EINVAL;
466
467 return 0;
468}
469
470static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
471 size_t len)
472{
473 void __iomem *baseAddr = brd->basemem;
474 u16 tmp;
475
476 writeb(HW_reset, baseAddr + Control_reg); /* reset */
477 msleep(10);
478 memset_io(baseAddr, 0, 4096);
479 memcpy_toio(baseAddr, buf, len); /* download BIOS */
480 writeb(0, baseAddr + Control_reg); /* restart */
481
482 msleep(2000);
483
484 switch (brd->boardType) {
485 case MOXA_BOARD_C218_ISA:
486 case MOXA_BOARD_C218_PCI:
487 tmp = readw(baseAddr + C218_key);
488 if (tmp != C218_KeyCode)
489 goto err;
490 break;
491 case MOXA_BOARD_CP204J:
492 tmp = readw(baseAddr + C218_key);
493 if (tmp != CP204J_KeyCode)
494 goto err;
495 break;
496 default:
497 tmp = readw(baseAddr + C320_key);
498 if (tmp != C320_KeyCode)
499 goto err;
500 tmp = readw(baseAddr + C320_status);
501 if (tmp != STS_init) {
eaa95a8d 502 printk(KERN_ERR "MOXA: bios upload failed -- CPU/Basic "
03718234
JS		 503 "module not found\n");
504 return -EIO;
505 }
506 break;
507 }
508
509 return 0;
510err:
eaa95a8d 511 printk(KERN_ERR "MOXA: bios upload failed -- board not found\n");
03718234
JS		 512 return -EIO;
513}
514
515static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
516 size_t len)
517{
518 void __iomem *baseAddr = brd->basemem;
519
520 if (len < 7168) {
eaa95a8d 521 printk(KERN_ERR "MOXA: invalid 320 bios -- too short\n");
03718234
JS		 522 return -EINVAL;
523 }
524
525 writew(len - 7168 - 2, baseAddr + C320bapi_len);
526 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
527 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
528 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
529 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
530
531 return 0;
532}
533
5292bcd3 534static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
03718234
JS		 535 size_t len)
536{
537 void __iomem *baseAddr = brd->basemem;
b46f69cd 538 const __le16 *uptr = ptr;
03718234 539 size_t wlen, len2, j;
5292bcd3 540 unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
08d01c79 541 unsigned int i, retry;
03718234
JS		 542 u16 usum, keycode;
543
5292bcd3
JS		 544 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
545 C218_KeyCode;
03718234 546
5292bcd3
JS		 547 switch (brd->boardType) {
548 case MOXA_BOARD_CP204J:
549 case MOXA_BOARD_C218_ISA:
550 case MOXA_BOARD_C218_PCI:
551 key = C218_key;
552 loadbuf = C218_LoadBuf;
553 loadlen = C218DLoad_len;
554 checksum = C218check_sum;
555 checksum_ok = C218chksum_ok;
556 break;
557 default:
558 key = C320_key;
559 keycode = C320_KeyCode;
560 loadbuf = C320_LoadBuf;
561 loadlen = C320DLoad_len;
562 checksum = C320check_sum;
563 checksum_ok = C320chksum_ok;
564 break;
03718234 565 }
03718234
JS		 566
567 usum = 0;
568 wlen = len >> 1;
569 for (i = 0; i < wlen; i++)
570 usum += le16_to_cpu(uptr[i]);
571 retry = 0;
572 do {
573 wlen = len >> 1;
574 j = 0;
575 while (wlen) {
576 len2 = (wlen > 2048) ? 2048 : wlen;
577 wlen -= len2;
5292bcd3 578 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
03718234 579 j += len2 << 1;
5292bcd3
JS		 580
581 writew(len2, baseAddr + loadlen);
582 writew(0, baseAddr + key);
583 for (i = 0; i < 100; i++) {
584 if (readw(baseAddr + key) == keycode)
03718234
JS		 585 break;
586 msleep(10);
587 }
5292bcd3 588 if (readw(baseAddr + key) != keycode)
03718234
JS		 589 return -EIO;
590 }
5292bcd3
JS		 591 writew(0, baseAddr + loadlen);
592 writew(usum, baseAddr + checksum);
593 writew(0, baseAddr + key);
594 for (i = 0; i < 100; i++) {
595 if (readw(baseAddr + key) == keycode)
03718234
JS		 596 break;
597 msleep(10);
598 }
599 retry++;
5292bcd3
JS		 600 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
601 if (readb(baseAddr + checksum_ok) != 1)
03718234
JS		 602 return -EIO;
603
5292bcd3 604 writew(0, baseAddr + key);
03718234
JS		 605 for (i = 0; i < 600; i++) {
606 if (readw(baseAddr + Magic_no) == Magic_code)
607 break;
608 msleep(10);
609 }
610 if (readw(baseAddr + Magic_no) != Magic_code)
611 return -EIO;
612
08d01c79 613 if (MOXA_IS_320(brd)) {
5292bcd3
JS		 614 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
615 writew(0x3800, baseAddr + TMS320_PORT1);
616 writew(0x3900, baseAddr + TMS320_PORT2);
617 writew(28499, baseAddr + TMS320_CLOCK);
618 } else {
619 writew(0x3200, baseAddr + TMS320_PORT1);
620 writew(0x3400, baseAddr + TMS320_PORT2);
621 writew(19999, baseAddr + TMS320_CLOCK);
622 }
03718234
JS		 623 }
624 writew(1, baseAddr + Disable_IRQ);
625 writew(0, baseAddr + Magic_no);
626 for (i = 0; i < 500; i++) {
627 if (readw(baseAddr + Magic_no) == Magic_code)
628 break;
629 msleep(10);
630 }
631 if (readw(baseAddr + Magic_no) != Magic_code)
632 return -EIO;
633
08d01c79 634 if (MOXA_IS_320(brd)) {
5292bcd3
JS		 635 j = readw(baseAddr + Module_cnt);
636 if (j <= 0)
637 return -EIO;
638 brd->numPorts = j * 8;
639 writew(j, baseAddr + Module_no);
640 writew(0, baseAddr + Magic_no);
641 for (i = 0; i < 600; i++) {
642 if (readw(baseAddr + Magic_no) == Magic_code)
643 break;
644 msleep(10);
645 }
646 if (readw(baseAddr + Magic_no) != Magic_code)
647 return -EIO;
03718234 648 }
03718234
JS		 649 brd->intNdx = baseAddr + IRQindex;
650 brd->intPend = baseAddr + IRQpending;
651 brd->intTable = baseAddr + IRQtable;
652
653 return 0;
654}
655
656static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
657 size_t len)
658{
659 void __iomem *ofsAddr, *baseAddr = brd->basemem;
660 struct moxa_port *port;
661 int retval, i;
662
663 if (len % 2) {
eaa95a8d 664 printk(KERN_ERR "MOXA: bios length is not even\n");
03718234
JS		 665 return -EINVAL;
666 }
667
5292bcd3
JS		 668 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
669 if (retval)
670 return retval;
671
03718234
JS		 672 switch (brd->boardType) {
673 case MOXA_BOARD_C218_ISA:
674 case MOXA_BOARD_C218_PCI:
675 case MOXA_BOARD_CP204J:
03718234
JS		 676 port = brd->ports;
677 for (i = 0; i < brd->numPorts; i++, port++) {
b4173f45 678 port->board = brd;
03718234
JS		 679 port->DCDState = 0;
680 port->tableAddr = baseAddr + Extern_table +
681 Extern_size * i;
682 ofsAddr = port->tableAddr;
683 writew(C218rx_mask, ofsAddr + RX_mask);
684 writew(C218tx_mask, ofsAddr + TX_mask);
685 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
686 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
687
688 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
689 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
690
691 }
692 break;
693 default:
03718234
JS		 694 port = brd->ports;
695 for (i = 0; i < brd->numPorts; i++, port++) {
b4173f45 696 port->board = brd;
03718234
JS		 697 port->DCDState = 0;
698 port->tableAddr = baseAddr + Extern_table +
699 Extern_size * i;
700 ofsAddr = port->tableAddr;
701 switch (brd->numPorts) {
702 case 8:
703 writew(C320p8rx_mask, ofsAddr + RX_mask);
704 writew(C320p8tx_mask, ofsAddr + TX_mask);
705 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
706 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
707 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
708 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
709
710 break;
711 case 16:
712 writew(C320p16rx_mask, ofsAddr + RX_mask);
713 writew(C320p16tx_mask, ofsAddr + TX_mask);
714 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
715 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
716 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
717 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
718 break;
719
720 case 24:
721 writew(C320p24rx_mask, ofsAddr + RX_mask);
722 writew(C320p24tx_mask, ofsAddr + TX_mask);
723 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
724 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
725 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
726 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
727 break;
728 case 32:
729 writew(C320p32rx_mask, ofsAddr + RX_mask);
730 writew(C320p32tx_mask, ofsAddr + TX_mask);
731 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
732 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
733 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
734 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
735 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
736 break;
737 }
738 }
739 break;
740 }
03718234
JS		 741 return 0;
742}
743
744static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
745{
2bca76e8 746 const void *ptr = fw->data;
03718234
JS		 747 char rsn[64];
748 u16 lens[5];
749 size_t len;
750 unsigned int a, lenp, lencnt;
751 int ret = -EINVAL;
752 struct {
753 __le32 magic; /* 0x34303430 */
754 u8 reserved1[2];
755 u8 type; /* UNIX = 3 */
756 u8 model; /* C218T=1, C320T=2, CP204=3 */
757 u8 reserved2[8];
758 __le16 len[5];
2bca76e8 759 } const *hdr = ptr;
03718234
JS		 760
761 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
762
763 if (fw->size < MOXA_FW_HDRLEN) {
764 strcpy(rsn, "too short (even header won't fit)");
765 goto err;
766 }
767 if (hdr->magic != cpu_to_le32(0x30343034)) {
768 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
769 goto err;
770 }
771 if (hdr->type != 3) {
772 sprintf(rsn, "not for linux, type is %u", hdr->type);
773 goto err;
774 }
775 if (moxa_check_fw_model(brd, hdr->model)) {
776 sprintf(rsn, "not for this card, model is %u", hdr->model);
777 goto err;
778 }
779
780 len = MOXA_FW_HDRLEN;
781 lencnt = hdr->model == 2 ? 5 : 3;
782 for (a = 0; a < ARRAY_SIZE(lens); a++) {
783 lens[a] = le16_to_cpu(hdr->len[a]);
784 if (lens[a] && len + lens[a] <= fw->size &&
785 moxa_check_fw(&fw->data[len]))
eaa95a8d 786 printk(KERN_WARNING "MOXA firmware: unexpected input "
03718234
JS		 787 "at offset %u, but going on\n", (u32)len);
788 if (!lens[a] && a < lencnt) {
789 sprintf(rsn, "too few entries in fw file");
790 goto err;
791 }
792 len += lens[a];
793 }
794
795 if (len != fw->size) {
796 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
797 (u32)len);
798 goto err;
799 }
800
801 ptr += MOXA_FW_HDRLEN;
802 lenp = 0; /* bios */
803
804 strcpy(rsn, "read above");
805
806 ret = moxa_load_bios(brd, ptr, lens[lenp]);
807 if (ret)
808 goto err;
809
810 /* we skip the tty section (lens[1]), since we don't need it */
811 ptr += lens[lenp] + lens[lenp + 1];
812 lenp += 2; /* comm */
813
814 if (hdr->model == 2) {
815 ret = moxa_load_320b(brd, ptr, lens[lenp]);
816 if (ret)
817 goto err;
818 /* skip another tty */
819 ptr += lens[lenp] + lens[lenp + 1];
820 lenp += 2;
821 }
822
823 ret = moxa_load_code(brd, ptr, lens[lenp]);
824 if (ret)
825 goto err;
826
827 return 0;
828err:
829 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
830 return ret;
831}
832
833static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
834{
835 const struct firmware *fw;
836 const char *file;
810ab09b 837 struct moxa_port *p;
793be898 838 unsigned int i, first_idx;
03718234
JS		 839 int ret;
840
810ab09b
JS		 841 brd->ports = kcalloc(MAX_PORTS_PER_BOARD, sizeof(*brd->ports),
842 GFP_KERNEL);
843 if (brd->ports == NULL) {
844 printk(KERN_ERR "cannot allocate memory for ports\n");
845 ret = -ENOMEM;
846 goto err;
847 }
848
849 for (i = 0, p = brd->ports; i < MAX_PORTS_PER_BOARD; i++, p++) {
44b7d1b3 850 tty_port_init(&p->port);
31f35939 851 p->port.ops = &moxa_port_ops;
810ab09b 852 p->type = PORT_16550A;
810ab09b 853 p->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
810ab09b
JS		 854 }
855
03718234
JS		 856 switch (brd->boardType) {
857 case MOXA_BOARD_C218_ISA:
858 case MOXA_BOARD_C218_PCI:
859 file = "c218tunx.cod";
860 break;
861 case MOXA_BOARD_CP204J:
862 file = "cp204unx.cod";
863 break;
864 default:
865 file = "c320tunx.cod";
866 break;
867 }
868
869 ret = request_firmware(&fw, file, dev);
870 if (ret) {
ec09cd56
JS		 871 printk(KERN_ERR "MOXA: request_firmware failed. Make sure "
872 "you've placed '%s' file into your firmware "
873 "loader directory (e.g. /lib/firmware)\n",
874 file);
810ab09b 875 goto err_free;
03718234
JS		 876 }
877
878 ret = moxa_load_fw(brd, fw);
879
880 release_firmware(fw);
810ab09b
JS		 881
882 if (ret)
883 goto err_free;
884
2a541341 885 spin_lock_bh(&moxa_lock);
810ab09b 886 brd->ready = 1;
0bcc4caa
JS		 887 if (!timer_pending(&moxaTimer))
888 mod_timer(&moxaTimer, jiffies + HZ / 50);
2a541341 889 spin_unlock_bh(&moxa_lock);
0bcc4caa 890
793be898
JS		 891 first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD;
892 for (i = 0; i < brd->numPorts; i++)
893 tty_port_register_device(&brd->ports[i].port, moxaDriver,
894 first_idx + i, dev);
895
810ab09b
JS		 896 return 0;
897err_free:
898 kfree(brd->ports);
899err:
03718234
JS		 900 return ret;
901}
902
810ab09b
JS		 903static void moxa_board_deinit(struct moxa_board_conf *brd)
904{
793be898 905 unsigned int a, opened, first_idx;
a8f5cda0
JS		 906
907 mutex_lock(&moxa_openlock);
7bcf97d1 908 spin_lock_bh(&moxa_lock);
810ab09b 909 brd->ready = 0;
7bcf97d1 910 spin_unlock_bh(&moxa_lock);
a8f5cda0
JS		 911
912 /* pci hot-un-plug support */
913 for (a = 0; a < brd->numPorts; a++)
d450b5a0
AC		 914 if (brd->ports[a].port.flags & ASYNC_INITIALIZED) {
915 struct tty_struct *tty = tty_port_tty_get(
916 &brd->ports[a].port);
917 if (tty) {
918 tty_hangup(tty);
919 tty_kref_put(tty);
920 }
921 }
a8f5cda0
JS		 922 while (1) {
923 opened = 0;
924 for (a = 0; a < brd->numPorts; a++)
9de6a51f 925 if (brd->ports[a].port.flags & ASYNC_INITIALIZED)
a8f5cda0
JS		 926 opened++;
927 mutex_unlock(&moxa_openlock);
928 if (!opened)
929 break;
930 msleep(50);
931 mutex_lock(&moxa_openlock);
932 }
933
793be898
JS		 934 first_idx = (brd - moxa_boards) * MAX_PORTS_PER_BOARD;
935 for (a = 0; a < brd->numPorts; a++)
936 tty_unregister_device(moxaDriver, first_idx + a);
937
810ab09b
JS		 938 iounmap(brd->basemem);
939 brd->basemem = NULL;
940 kfree(brd->ports);
941}
942
1da177e4 943#ifdef CONFIG_PCI
9cde5bf0
JS		 944static int __devinit moxa_pci_probe(struct pci_dev *pdev,
945 const struct pci_device_id *ent)
1da177e4 946{
9cde5bf0
JS		 947 struct moxa_board_conf *board;
948 unsigned int i;
949 int board_type = ent->driver_data;
950 int retval;
951
952 retval = pci_enable_device(pdev);
7aeb95da
JS		 953 if (retval) {
954 dev_err(&pdev->dev, "can't enable pci device\n");
9cde5bf0 955 goto err;
7aeb95da 956 }
9cde5bf0
JS		 957
958 for (i = 0; i < MAX_BOARDS; i++)
959 if (moxa_boards[i].basemem == NULL)
960 break;
961
962 retval = -ENODEV;
963 if (i >= MAX_BOARDS) {
7aeb95da 964 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
9cde5bf0
JS		 965 "found. Board is ignored.\n", MAX_BOARDS);
966 goto err;
967 }
968
969 board = &moxa_boards[i];
e46a5e3f
JS		 970
971 retval = pci_request_region(pdev, 2, "moxa-base");
972 if (retval) {
973 dev_err(&pdev->dev, "can't request pci region 2\n");
974 goto err;
975 }
976
24cb2335 977 board->basemem = ioremap_nocache(pci_resource_start(pdev, 2), 0x4000);
7aeb95da
JS		 978 if (board->basemem == NULL) {
979 dev_err(&pdev->dev, "can't remap io space 2\n");
e46a5e3f 980 goto err_reg;
7aeb95da 981 }
9cde5bf0 982
1da177e4
LT		 983 board->boardType = board_type;
984 switch (board_type) {
985 case MOXA_BOARD_C218_ISA:
986 case MOXA_BOARD_C218_PCI:
987 board->numPorts = 8;
988 break;
989
990 case MOXA_BOARD_CP204J:
991 board->numPorts = 4;
992 break;
993 default:
994 board->numPorts = 0;
995 break;
996 }
997 board->busType = MOXA_BUS_TYPE_PCI;
a784bf7c 998
03718234
JS		 999 retval = moxa_init_board(board, &pdev->dev);
1000 if (retval)
1001 goto err_base;
1002
9cde5bf0 1003 pci_set_drvdata(pdev, board);
1da177e4 1004
bb9f910a
JS		 1005 dev_info(&pdev->dev, "board '%s' ready (%u ports, firmware loaded)\n",
1006 moxa_brdname[board_type - 1], board->numPorts);
1007
eaa95a8d 1008 return 0;
03718234
JS		 1009err_base:
1010 iounmap(board->basemem);
1011 board->basemem = NULL;
e46a5e3f
JS		 1012err_reg:
1013 pci_release_region(pdev, 2);
9cde5bf0
JS		 1014err:
1015 return retval;
1016}
1017
1018static void __devexit moxa_pci_remove(struct pci_dev *pdev)
1019{
1020 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
1021
810ab09b
JS		 1022 moxa_board_deinit(brd);
1023
e46a5e3f 1024 pci_release_region(pdev, 2);
1da177e4 1025}
a784bf7c
JS		 1026
1027static struct pci_driver moxa_pci_driver = {
1028 .name = "moxa",
1029 .id_table = moxa_pcibrds,
1030 .probe = moxa_pci_probe,
1031 .remove = __devexit_p(moxa_pci_remove)
1032};
1da177e4
LT		 1033#endif /* CONFIG_PCI */
1034
1035static int __init moxa_init(void)
1036{
810ab09b 1037 unsigned int isabrds = 0;
d353eca4 1038 int retval = 0;
c6fc826e
RM		 1039 struct moxa_board_conf *brd = moxa_boards;
1040 unsigned int i;
1da177e4 1041
7aeb95da
JS		 1042 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
1043 MOXA_VERSION);
793be898
JS		 1044
1045 tty_port_init(&moxa_service_port);
1046
1047 moxaDriver = tty_alloc_driver(MAX_PORTS + 1,
1048 TTY_DRIVER_REAL_RAW |
1049 TTY_DRIVER_DYNAMIC_DEV);
1da177e4
LT		 1050 if (!moxaDriver)
1051 return -ENOMEM;
1052
9b4e3b13 1053 moxaDriver->name = "ttyMX";
1da177e4
LT		 1054 moxaDriver->major = ttymajor;
1055 moxaDriver->minor_start = 0;
1056 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
1057 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
1058 moxaDriver->init_termios = tty_std_termios;
1da177e4 1059 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
606d099c
AC		 1060 moxaDriver->init_termios.c_ispeed = 9600;
1061 moxaDriver->init_termios.c_ospeed = 9600;
1da177e4 1062 tty_set_operations(moxaDriver, &moxa_ops);
793be898
JS		 1063 /* Having one more port only for ioctls is ugly */
1064 tty_port_link_device(&moxa_service_port, moxaDriver, MAX_PORTS);
1da177e4 1065
1da177e4 1066 if (tty_register_driver(moxaDriver)) {
eaa95a8d 1067 printk(KERN_ERR "can't register MOXA Smartio tty driver!\n");
1da177e4
LT		 1068 put_tty_driver(moxaDriver);
1069 return -1;
1070 }
1da177e4 1071
d353eca4 1072 /* Find the boards defined from module args. */
c6fc826e 1073
1da177e4 1074 for (i = 0; i < MAX_BOARDS; i++) {
d353eca4
JS		 1075 if (!baseaddr[i])
1076 break;
1077 if (type[i] == MOXA_BOARD_C218_ISA ||
1078 type[i] == MOXA_BOARD_C320_ISA) {
7aeb95da 1079 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
d353eca4
JS		 1080 isabrds + 1, moxa_brdname[type[i] - 1],
1081 baseaddr[i]);
1082 brd->boardType = type[i];
1083 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
1084 numports[i];
1085 brd->busType = MOXA_BUS_TYPE_ISA;
24cb2335 1086 brd->basemem = ioremap_nocache(baseaddr[i], 0x4000);
d353eca4 1087 if (!brd->basemem) {
eaa95a8d 1088 printk(KERN_ERR "MOXA: can't remap %lx\n",
d353eca4 1089 baseaddr[i]);
1da177e4
LT		 1090 continue;
1091 }
03718234
JS		 1092 if (moxa_init_board(brd, NULL)) {
1093 iounmap(brd->basemem);
1094 brd->basemem = NULL;
1095 continue;
1096 }
d353eca4 1097
bb9f910a
JS		 1098 printk(KERN_INFO "MOXA isa board found at 0x%.8lu and "
1099 "ready (%u ports, firmware loaded)\n",
1100 baseaddr[i], brd->numPorts);
1101
d353eca4
JS		 1102 brd++;
1103 isabrds++;
1da177e4
LT		 1104 }
1105 }
a784bf7c 1106
1da177e4 1107#ifdef CONFIG_PCI
a784bf7c
JS		 1108 retval = pci_register_driver(&moxa_pci_driver);
1109 if (retval) {
eaa95a8d 1110 printk(KERN_ERR "Can't register MOXA pci driver!\n");
d353eca4 1111 if (isabrds)
a784bf7c 1112 retval = 0;
1da177e4
LT		 1113 }
1114#endif
a784bf7c 1115
a784bf7c 1116 return retval;
1da177e4
LT		 1117}
1118
1119static void __exit moxa_exit(void)
1120{
eaa95a8d 1121 unsigned int i;
1da177e4 1122
9cde5bf0 1123#ifdef CONFIG_PCI
a784bf7c 1124 pci_unregister_driver(&moxa_pci_driver);
9cde5bf0 1125#endif
a784bf7c 1126
810ab09b
JS		 1127 for (i = 0; i < MAX_BOARDS; i++) /* ISA boards */
1128 if (moxa_boards[i].ready)
1129 moxa_board_deinit(&moxa_boards[i]);
2a541341
JS		 1130
1131 del_timer_sync(&moxaTimer);
1132
1133 if (tty_unregister_driver(moxaDriver))
1134 printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
1135 "serial driver\n");
1136 put_tty_driver(moxaDriver);
1da177e4
LT		 1137}
1138
1139module_init(moxa_init);
1140module_exit(moxa_exit);
1141
f176178b 1142static void moxa_shutdown(struct tty_port *port)
a8f5cda0 1143{
f176178b
AC		 1144 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1145 MoxaPortDisable(ch);
a8f5cda0 1146 MoxaPortFlushData(ch, 2);
a8f5cda0
JS		 1147}
1148
31f35939
AC		 1149static int moxa_carrier_raised(struct tty_port *port)
1150{
1151 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1152 int dcd;
1153
8482bcd5 1154 spin_lock_irq(&port->lock);
31f35939 1155 dcd = ch->DCDState;
8482bcd5 1156 spin_unlock_irq(&port->lock);
31f35939
AC		 1157 return dcd;
1158}
1159
f176178b 1160static void moxa_dtr_rts(struct tty_port *port, int onoff)
a8f5cda0 1161{
f176178b
AC		 1162 struct moxa_port *ch = container_of(port, struct moxa_port, port);
1163 MoxaPortLineCtrl(ch, onoff, onoff);
a8f5cda0
JS		 1164}
1165
f176178b 1166
1da177e4
LT		 1167static int moxa_open(struct tty_struct *tty, struct file *filp)
1168{
810ab09b 1169 struct moxa_board_conf *brd;
8f8ecbad 1170 struct moxa_port *ch;
1da177e4 1171 int port;
1da177e4 1172
11324edd 1173 port = tty->index;
1da177e4 1174 if (port == MAX_PORTS) {
74d7d97b 1175 return capable(CAP_SYS_ADMIN) ? 0 : -EPERM;
1da177e4 1176 }
a8f5cda0
JS		 1177 if (mutex_lock_interruptible(&moxa_openlock))
1178 return -ERESTARTSYS;
810ab09b 1179 brd = &moxa_boards[port / MAX_PORTS_PER_BOARD];
a8f5cda0
JS		 1180 if (!brd->ready) {
1181 mutex_unlock(&moxa_openlock);
810ab09b 1182 return -ENODEV;
a8f5cda0 1183 }
1da177e4 1184
f0e85277
DE		 1185 if (port % MAX_PORTS_PER_BOARD >= brd->numPorts) {
1186 mutex_unlock(&moxa_openlock);
1187 return -ENODEV;
1188 }
1189
810ab09b 1190 ch = &brd->ports[port % MAX_PORTS_PER_BOARD];
9de6a51f 1191 ch->port.count++;
1da177e4 1192 tty->driver_data = ch;
d450b5a0 1193 tty_port_tty_set(&ch->port, tty);
f176178b 1194 mutex_lock(&ch->port.mutex);
9de6a51f 1195 if (!(ch->port.flags & ASYNC_INITIALIZED)) {
1da177e4 1196 ch->statusflags = 0;
adc8d746 1197 moxa_set_tty_param(tty, &tty->termios);
b4173f45
JS		 1198 MoxaPortLineCtrl(ch, 1, 1);
1199 MoxaPortEnable(ch);
a8f5cda0 1200 MoxaSetFifo(ch, ch->type == PORT_16550A);
9de6a51f 1201 ch->port.flags |= ASYNC_INITIALIZED;
1da177e4 1202 }
f176178b 1203 mutex_unlock(&ch->port.mutex);
a8f5cda0 1204 mutex_unlock(&moxa_openlock);
1da177e4 1205
7c31bdb6 1206 return tty_port_block_til_ready(&ch->port, tty, filp);
1da177e4
LT		 1207}
1208
1209static void moxa_close(struct tty_struct *tty, struct file *filp)
1210{
f176178b 1211 struct moxa_port *ch = tty->driver_data;
adc8d746 1212 ch->cflag = tty->termios.c_cflag;
f176178b 1213 tty_port_close(&ch->port, tty, filp);
1da177e4
LT		 1214}
1215
1216static int moxa_write(struct tty_struct *tty,
1217 const unsigned char *buf, int count)
1218{
b4173f45 1219 struct moxa_port *ch = tty->driver_data;
0ad7c9af 1220 unsigned long flags;
b4173f45 1221 int len;
1da177e4 1222
1da177e4 1223 if (ch == NULL)
b4173f45 1224 return 0;
33f0f88f 1225
0ad7c9af 1226 spin_lock_irqsave(&moxa_lock, flags);
d450b5a0 1227 len = MoxaPortWriteData(tty, buf, count);
0ad7c9af 1228 spin_unlock_irqrestore(&moxa_lock, flags);
1da177e4 1229
a808ac0c 1230 set_bit(LOWWAIT, &ch->statusflags);
eaa95a8d 1231 return len;
1da177e4
LT		 1232}
1233
1234static int moxa_write_room(struct tty_struct *tty)
1235{
8f8ecbad 1236 struct moxa_port *ch;
1da177e4
LT		 1237
1238 if (tty->stopped)
eaa95a8d 1239 return 0;
b4173f45 1240 ch = tty->driver_data;
1da177e4 1241 if (ch == NULL)
eaa95a8d 1242 return 0;
b4173f45 1243 return MoxaPortTxFree(ch);
1da177e4
LT		 1244}
1245
1246static void moxa_flush_buffer(struct tty_struct *tty)
1247{
b4173f45 1248 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1249
1250 if (ch == NULL)
1251 return;
b4173f45 1252 MoxaPortFlushData(ch, 1);
1da177e4
LT		 1253 tty_wakeup(tty);
1254}
1255
1256static int moxa_chars_in_buffer(struct tty_struct *tty)
1257{
b4173f45 1258 struct moxa_port *ch = tty->driver_data;
1da177e4 1259 int chars;
1da177e4 1260
b4173f45 1261 chars = MoxaPortTxQueue(ch);
f710ebd7 1262 if (chars)
1da177e4
LT		 1263 /*
1264 * Make it possible to wakeup anything waiting for output
1265 * in tty_ioctl.c, etc.
1266 */
f710ebd7 1267 set_bit(EMPTYWAIT, &ch->statusflags);
eaa95a8d 1268 return chars;
1da177e4
LT		 1269}
1270
60b33c13 1271static int moxa_tiocmget(struct tty_struct *tty)
1da177e4 1272{
8482bcd5 1273 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1274 int flag = 0, dtr, rts;
1275
b4173f45 1276 MoxaPortGetLineOut(ch, &dtr, &rts);
1da177e4
LT		 1277 if (dtr)
1278 flag |= TIOCM_DTR;
1279 if (rts)
1280 flag |= TIOCM_RTS;
b4173f45 1281 dtr = MoxaPortLineStatus(ch);
1da177e4
LT		 1282 if (dtr & 1)
1283 flag |= TIOCM_CTS;
1284 if (dtr & 2)
1285 flag |= TIOCM_DSR;
1286 if (dtr & 4)
1287 flag |= TIOCM_CD;
1288 return flag;
1289}
1290
20b9d177 1291static int moxa_tiocmset(struct tty_struct *tty,
1da177e4
LT		 1292 unsigned int set, unsigned int clear)
1293{
a8f5cda0 1294 struct moxa_port *ch;
1da177e4
LT		 1295 int dtr, rts;
1296
a8f5cda0
JS		 1297 mutex_lock(&moxa_openlock);
1298 ch = tty->driver_data;
1299 if (!ch) {
1300 mutex_unlock(&moxa_openlock);
74d7d97b 1301 return -EINVAL;
a8f5cda0 1302 }
1da177e4 1303
b4173f45 1304 MoxaPortGetLineOut(ch, &dtr, &rts);
1da177e4
LT		 1305 if (set & TIOCM_RTS)
1306 rts = 1;
1307 if (set & TIOCM_DTR)
1308 dtr = 1;
1309 if (clear & TIOCM_RTS)
1310 rts = 0;
1311 if (clear & TIOCM_DTR)
1312 dtr = 0;
b4173f45 1313 MoxaPortLineCtrl(ch, dtr, rts);
a8f5cda0 1314 mutex_unlock(&moxa_openlock);
1da177e4
LT		 1315 return 0;
1316}
1317
1da177e4 1318static void moxa_set_termios(struct tty_struct *tty,
eaa95a8d 1319 struct ktermios *old_termios)
1da177e4 1320{
eaa95a8d 1321 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1322
1323 if (ch == NULL)
1324 return;
db1acaa6 1325 moxa_set_tty_param(tty, old_termios);
eaa95a8d 1326 if (!(old_termios->c_cflag & CLOCAL) && C_CLOCAL(tty))
9de6a51f 1327 wake_up_interruptible(&ch->port.open_wait);
1da177e4
LT		 1328}
1329
1330static void moxa_stop(struct tty_struct *tty)
1331{
eaa95a8d 1332 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1333
1334 if (ch == NULL)
1335 return;
b4173f45 1336 MoxaPortTxDisable(ch);
a808ac0c 1337 set_bit(TXSTOPPED, &ch->statusflags);
1da177e4
LT		 1338}
1339
1340
1341static void moxa_start(struct tty_struct *tty)
1342{
eaa95a8d 1343 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 1344
1345 if (ch == NULL)
1346 return;
1347
58112dfb 1348 if (!test_bit(TXSTOPPED, &ch->statusflags))
1da177e4
LT		 1349 return;
1350
b4173f45 1351 MoxaPortTxEnable(ch);
a808ac0c 1352 clear_bit(TXSTOPPED, &ch->statusflags);
1da177e4
LT		 1353}
1354
1355static void moxa_hangup(struct tty_struct *tty)
1356{
a808ac0c 1357 struct moxa_port *ch = tty->driver_data;
f176178b 1358 tty_port_hangup(&ch->port);
1da177e4
LT		 1359}
1360
7bcf97d1 1361static void moxa_new_dcdstate(struct moxa_port *p, u8 dcd)
1da177e4 1362{
d450b5a0 1363 struct tty_struct *tty;
8482bcd5 1364 unsigned long flags;
7bcf97d1 1365 dcd = !!dcd;
1da177e4 1366
8482bcd5 1367 spin_lock_irqsave(&p->port.lock, flags);
d450b5a0 1368 if (dcd != p->DCDState) {
8482bcd5
AC		 1369 p->DCDState = dcd;
1370 spin_unlock_irqrestore(&p->port.lock, flags);
d450b5a0
AC		 1371 tty = tty_port_tty_get(&p->port);
1372 if (tty && C_CLOCAL(tty) && !dcd)
1373 tty_hangup(tty);
1374 tty_kref_put(tty);
7bcf97d1 1375 }
8482bcd5
AC		 1376 else
1377 spin_unlock_irqrestore(&p->port.lock, flags);
7bcf97d1 1378}
1da177e4 1379
7bcf97d1
JS		 1380static int moxa_poll_port(struct moxa_port *p, unsigned int handle,
1381 u16 __iomem *ip)
1382{
d450b5a0 1383 struct tty_struct *tty = tty_port_tty_get(&p->port);
7bcf97d1 1384 void __iomem *ofsAddr;
9de6a51f 1385 unsigned int inited = p->port.flags & ASYNC_INITIALIZED;
7bcf97d1
JS		 1386 u16 intr;
1387
1388 if (tty) {
a808ac0c 1389 if (test_bit(EMPTYWAIT, &p->statusflags) &&
7bcf97d1 1390 MoxaPortTxQueue(p) == 0) {
a808ac0c 1391 clear_bit(EMPTYWAIT, &p->statusflags);
7bcf97d1
JS		 1392 tty_wakeup(tty);
1393 }
a808ac0c 1394 if (test_bit(LOWWAIT, &p->statusflags) && !tty->stopped &&
7bcf97d1 1395 MoxaPortTxQueue(p) <= WAKEUP_CHARS) {
a808ac0c 1396 clear_bit(LOWWAIT, &p->statusflags);
7bcf97d1
JS		 1397 tty_wakeup(tty);
1398 }
1399
f9b412a8 1400 if (inited && !test_bit(TTY_THROTTLED, &tty->flags) &&
7bcf97d1
JS		 1401 MoxaPortRxQueue(p) > 0) { /* RX */
1402 MoxaPortReadData(p);
1403 tty_schedule_flip(tty);
1404 }
1405 } else {
a808ac0c 1406 clear_bit(EMPTYWAIT, &p->statusflags);
7bcf97d1 1407 MoxaPortFlushData(p, 0); /* flush RX */
1da177e4 1408 }
0bcc4caa 1409
7bcf97d1 1410 if (!handle) /* nothing else to do */
0e0fd7d7 1411 goto put;
7bcf97d1
JS		 1412
1413 intr = readw(ip); /* port irq status */
1414 if (intr == 0)
0e0fd7d7 1415 goto put;
7bcf97d1
JS		 1416
1417 writew(0, ip); /* ACK port */
1418 ofsAddr = p->tableAddr;
1419 if (intr & IntrTx) /* disable tx intr */
1420 writew(readw(ofsAddr + HostStat) & ~WakeupTx,
1421 ofsAddr + HostStat);
1422
1423 if (!inited)
0e0fd7d7 1424 goto put;
7bcf97d1
JS		 1425
1426 if (tty && (intr & IntrBreak) && !I_IGNBRK(tty)) { /* BREAK */
1427 tty_insert_flip_char(tty, 0, TTY_BREAK);
1428 tty_schedule_flip(tty);
1429 }
1430
1431 if (intr & IntrLine)
1432 moxa_new_dcdstate(p, readb(ofsAddr + FlagStat) & DCD_state);
0e0fd7d7
JS		 1433put:
1434 tty_kref_put(tty);
7bcf97d1
JS		 1435
1436 return 0;
1437}
1438
1439static void moxa_poll(unsigned long ignored)
1440{
1441 struct moxa_board_conf *brd;
1442 u16 __iomem *ip;
2a541341 1443 unsigned int card, port, served = 0;
7bcf97d1
JS		 1444
1445 spin_lock(&moxa_lock);
1da177e4 1446 for (card = 0; card < MAX_BOARDS; card++) {
7bcf97d1
JS		 1447 brd = &moxa_boards[card];
1448 if (!brd->ready)
1da177e4 1449 continue;
7bcf97d1 1450
2a541341
JS		 1451 served++;
1452
7bcf97d1
JS		 1453 ip = NULL;
1454 if (readb(brd->intPend) == 0xff)
1455 ip = brd->intTable + readb(brd->intNdx);
1456
1457 for (port = 0; port < brd->numPorts; port++)
1458 moxa_poll_port(&brd->ports[port], !!ip, ip + port);
1459
1460 if (ip)
1461 writeb(0, brd->intPend); /* ACK */
1462
1463 if (moxaLowWaterChk) {
1464 struct moxa_port *p = brd->ports;
1465 for (port = 0; port < brd->numPorts; port++, p++)
1466 if (p->lowChkFlag) {
1467 p->lowChkFlag = 0;
1468 moxa_low_water_check(p->tableAddr);
1da177e4 1469 }
1da177e4
LT		 1470 }
1471 }
7bcf97d1 1472 moxaLowWaterChk = 0;
1da177e4 1473
2a541341
JS		 1474 if (served)
1475 mod_timer(&moxaTimer, jiffies + HZ / 50);
1476 spin_unlock(&moxa_lock);
1da177e4
LT		 1477}
1478
1479/******************************************************************************/
1480
db1acaa6 1481static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4 1482{
adc8d746 1483 register struct ktermios *ts = &tty->termios;
eaa95a8d 1484 struct moxa_port *ch = tty->driver_data;
db1acaa6 1485 int rts, cts, txflow, rxflow, xany, baud;
1da177e4 1486
1da177e4
LT		 1487 rts = cts = txflow = rxflow = xany = 0;
1488 if (ts->c_cflag & CRTSCTS)
1489 rts = cts = 1;
1490 if (ts->c_iflag & IXON)
1491 txflow = 1;
1492 if (ts->c_iflag & IXOFF)
1493 rxflow = 1;
1494 if (ts->c_iflag & IXANY)
1495 xany = 1;
db1acaa6
AC		 1496
1497 /* Clear the features we don't support */
1498 ts->c_cflag &= ~CMSPAR;
b4173f45
JS		 1499 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1500 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
db1acaa6
AC		 1501 if (baud == -1)
1502 baud = tty_termios_baud_rate(old_termios);
1503 /* Not put the baud rate into the termios data */
1504 tty_encode_baud_rate(tty, baud, baud);
1da177e4
LT		 1505}
1506
1da177e4
LT		 1507/*****************************************************************************
1508 * Driver level functions: *
1da177e4 1509 *****************************************************************************/
1da177e4 1510
b4173f45 1511static void MoxaPortFlushData(struct moxa_port *port, int mode)
1da177e4
LT		 1512{
1513 void __iomem *ofsAddr;
eaa95a8d 1514 if (mode < 0 || mode > 2)
1da177e4 1515 return;
b4173f45 1516 ofsAddr = port->tableAddr;
1da177e4
LT		 1517 moxafunc(ofsAddr, FC_FlushQueue, mode);
1518 if (mode != 1) {
b4173f45 1519 port->lowChkFlag = 0;
6f56b658 1520 moxa_low_water_check(ofsAddr);
1da177e4
LT		 1521 }
1522}
1523
1da177e4
LT		 1524/*
1525 * Moxa Port Number Description:
1526 *
1527 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1528 * the port number using in MOXA driver functions will be 0 to 31 for
1529 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1530 * to 127 for fourth. For example, if you setup three MOXA boards,
1531 * first board is C218, second board is C320-16 and third board is
1532 * C320-32. The port number of first board (C218 - 8 ports) is from
1533 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1534 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1535 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1536 * 127 will be invalid.
1537 *
1538 *
1539 * Moxa Functions Description:
1540 *
1541 * Function 1: Driver initialization routine, this routine must be
1542 * called when initialized driver.
1543 * Syntax:
1544 * void MoxaDriverInit();
1545 *
1546 *
1547 * Function 2: Moxa driver private IOCTL command processing.
1548 * Syntax:
1549 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1550 *
1551 * unsigned int cmd : IOCTL command
1552 * unsigned long arg : IOCTL argument
1553 * int port : port number (0 - 127)
1554 *
1555 * return: 0 (OK)
1556 * -EINVAL
1557 * -ENOIOCTLCMD
1558 *
1559 *
1da177e4
LT		 1560 * Function 6: Enable this port to start Tx/Rx data.
1561 * Syntax:
1562 * void MoxaPortEnable(int port);
1563 * int port : port number (0 - 127)
1564 *
1565 *
1566 * Function 7: Disable this port
1567 * Syntax:
1568 * void MoxaPortDisable(int port);
1569 * int port : port number (0 - 127)
1570 *
1571 *
1da177e4
LT		 1572 * Function 10: Setting baud rate of this port.
1573 * Syntax:
08d01c79 1574 * speed_t MoxaPortSetBaud(int port, speed_t baud);
1da177e4
LT		 1575 * int port : port number (0 - 127)
1576 * long baud : baud rate (50 - 115200)
1577 *
1578 * return: 0 : this port is invalid or baud < 50
1579 * 50 - 115200 : the real baud rate set to the port, if
1580 * the argument baud is large than maximun
1581 * available baud rate, the real setting
1582 * baud rate will be the maximun baud rate.
1583 *
1584 *
1da177e4
LT		 1585 * Function 12: Configure the port.
1586 * Syntax:
606d099c 1587 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1da177e4 1588 * int port : port number (0 - 127)
606d099c 1589 * struct ktermios * termio : termio structure pointer
c7bce309 1590 * speed_t baud : baud rate
1da177e4
LT		 1591 *
1592 * return: -1 : this port is invalid or termio == NULL
1593 * 0 : setting O.K.
1594 *
1595 *
1596 * Function 13: Get the DTR/RTS state of this port.
1597 * Syntax:
1598 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1599 * int port : port number (0 - 127)
1600 * int * dtrState : pointer to INT to receive the current DTR
1601 * state. (if NULL, this function will not
1602 * write to this address)
1603 * int * rtsState : pointer to INT to receive the current RTS
1604 * state. (if NULL, this function will not
1605 * write to this address)
1606 *
1607 * return: -1 : this port is invalid
1608 * 0 : O.K.
1609 *
1610 *
1611 * Function 14: Setting the DTR/RTS output state of this port.
1612 * Syntax:
1613 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1614 * int port : port number (0 - 127)
1615 * int dtrState : DTR output state (0: off, 1: on)
1616 * int rtsState : RTS output state (0: off, 1: on)
1617 *
1618 *
1619 * Function 15: Setting the flow control of this port.
1620 * Syntax:
1621 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1622 * int txFlow,int xany);
1623 * int port : port number (0 - 127)
1624 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1625 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1626 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1627 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1628 * int xany : S/W XANY flow control (0: no, 1: yes)
1629 *
1630 *
1631 * Function 16: Get ths line status of this port
1632 * Syntax:
1633 * int MoxaPortLineStatus(int port);
1634 * int port : port number (0 - 127)
1635 *
1636 * return: Bit 0 - CTS state (0: off, 1: on)
1637 * Bit 1 - DSR state (0: off, 1: on)
1638 * Bit 2 - DCD state (0: off, 1: on)
1639 *
1640 *
1da177e4
LT		 1641 * Function 19: Flush the Rx/Tx buffer data of this port.
1642 * Syntax:
1643 * void MoxaPortFlushData(int port, int mode);
1644 * int port : port number (0 - 127)
1645 * int mode
1646 * 0 : flush the Rx buffer
1647 * 1 : flush the Tx buffer
1648 * 2 : flush the Rx and Tx buffer
1649 *
1650 *
1651 * Function 20: Write data.
1652 * Syntax:
1653 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1654 * int port : port number (0 - 127)
1655 * unsigned char * buffer : pointer to write data buffer.
1656 * int length : write data length
1657 *
1658 * return: 0 - length : real write data length
1659 *
1660 *
1661 * Function 21: Read data.
1662 * Syntax:
33f0f88f 1663 * int MoxaPortReadData(int port, struct tty_struct *tty);
1da177e4 1664 * int port : port number (0 - 127)
33f0f88f 1665 * struct tty_struct *tty : tty for data
1da177e4
LT		 1666 *
1667 * return: 0 - length : real read data length
1668 *
1669 *
1da177e4
LT		 1670 * Function 24: Get the Tx buffer current queued data bytes
1671 * Syntax:
1672 * int MoxaPortTxQueue(int port);
1673 * int port : port number (0 - 127)
1674 *
1675 * return: .. : Tx buffer current queued data bytes
1676 *
1677 *
1678 * Function 25: Get the Tx buffer current free space
1679 * Syntax:
1680 * int MoxaPortTxFree(int port);
1681 * int port : port number (0 - 127)
1682 *
1683 * return: .. : Tx buffer current free space
1684 *
1685 *
1686 * Function 26: Get the Rx buffer current queued data bytes
1687 * Syntax:
1688 * int MoxaPortRxQueue(int port);
1689 * int port : port number (0 - 127)
1690 *
1691 * return: .. : Rx buffer current queued data bytes
1692 *
1693 *
1da177e4
LT		 1694 * Function 28: Disable port data transmission.
1695 * Syntax:
1696 * void MoxaPortTxDisable(int port);
1697 * int port : port number (0 - 127)
1698 *
1699 *
1700 * Function 29: Enable port data transmission.
1701 * Syntax:
1702 * void MoxaPortTxEnable(int port);
1703 * int port : port number (0 - 127)
1704 *
1705 *
1da177e4
LT		 1706 * Function 31: Get the received BREAK signal count and reset it.
1707 * Syntax:
1708 * int MoxaPortResetBrkCnt(int port);
1709 * int port : port number (0 - 127)
1710 *
1711 * return: 0 - .. : BREAK signal count
1712 *
1713 *
1da177e4 1714 */
1da177e4 1715
b4173f45 1716static void MoxaPortEnable(struct moxa_port *port)
1da177e4
LT		 1717{
1718 void __iomem *ofsAddr;
eaa95a8d 1719 u16 lowwater = 512;
1da177e4 1720
b4173f45 1721 ofsAddr = port->tableAddr;
1da177e4 1722 writew(lowwater, ofsAddr + Low_water);
08d01c79 1723 if (MOXA_IS_320(port->board))
1da177e4 1724 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
eaa95a8d
JS		 1725 else
1726 writew(readw(ofsAddr + HostStat) | WakeupBreak,
1727 ofsAddr + HostStat);
1da177e4
LT		 1728
1729 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
1730 moxafunc(ofsAddr, FC_FlushQueue, 2);
1731
1732 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
1733 MoxaPortLineStatus(port);
1734}
1735
b4173f45 1736static void MoxaPortDisable(struct moxa_port *port)
1da177e4 1737{
b4173f45 1738 void __iomem *ofsAddr = port->tableAddr;
1da177e4
LT		 1739
1740 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
1741 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
1742 writew(0, ofsAddr + HostStat);
1743 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
1744}
1745
08d01c79 1746static speed_t MoxaPortSetBaud(struct moxa_port *port, speed_t baud)
1da177e4 1747{
08d01c79
JS		 1748 void __iomem *ofsAddr = port->tableAddr;
1749 unsigned int clock, val;
1750 speed_t max;
1da177e4 1751
08d01c79
JS		 1752 max = MOXA_IS_320(port->board) ? 460800 : 921600;
1753 if (baud < 50)
eaa95a8d 1754 return 0;
1da177e4
LT		 1755 if (baud > max)
1756 baud = max;
08d01c79 1757 clock = 921600;
1da177e4
LT		 1758 val = clock / baud;
1759 moxafunc(ofsAddr, FC_SetBaud, val);
1760 baud = clock / val;
eaa95a8d 1761 return baud;
1da177e4
LT		 1762}
1763
b4173f45
JS		 1764static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
1765 speed_t baud)
1da177e4
LT		 1766{
1767 void __iomem *ofsAddr;
1da177e4
LT		 1768 tcflag_t mode = 0;
1769
b4173f45 1770 ofsAddr = port->tableAddr;
1da177e4
LT		 1771
1772 mode = termio->c_cflag & CSIZE;
1773 if (mode == CS5)
1774 mode = MX_CS5;
1775 else if (mode == CS6)
1776 mode = MX_CS6;
1777 else if (mode == CS7)
1778 mode = MX_CS7;
1779 else if (mode == CS8)
1780 mode = MX_CS8;
1781
1782 if (termio->c_cflag & CSTOPB) {
1783 if (mode == MX_CS5)
1784 mode |= MX_STOP15;
1785 else
1786 mode |= MX_STOP2;
1787 } else
1788 mode |= MX_STOP1;
1789
1790 if (termio->c_cflag & PARENB) {
1791 if (termio->c_cflag & PARODD)
1792 mode |= MX_PARODD;
1793 else
1794 mode |= MX_PAREVEN;
1795 } else
1796 mode |= MX_PARNONE;
1797
eaa95a8d 1798 moxafunc(ofsAddr, FC_SetDataMode, (u16)mode);
1da177e4 1799
08d01c79
JS		 1800 if (MOXA_IS_320(port->board) && baud >= 921600)
1801 return -1;
1802
db1acaa6 1803 baud = MoxaPortSetBaud(port, baud);
1da177e4
LT		 1804
1805 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
f5c5a36d 1806 spin_lock_irq(&moxafunc_lock);
1da177e4
LT		 1807 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
1808 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
1809 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
6f56b658 1810 moxa_wait_finish(ofsAddr);
a808ac0c 1811 spin_unlock_irq(&moxafunc_lock);
1da177e4
LT		 1812
1813 }
eaa95a8d 1814 return baud;
1da177e4
LT		 1815}
1816
b4173f45
JS		 1817static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
1818 int *rtsState)
1da177e4 1819{
b4173f45
JS		 1820 if (dtrState)
1821 *dtrState = !!(port->lineCtrl & DTR_ON);
1822 if (rtsState)
1823 *rtsState = !!(port->lineCtrl & RTS_ON);
1824
eaa95a8d 1825 return 0;
1da177e4
LT		 1826}
1827
b4173f45 1828static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
1da177e4 1829{
eaa95a8d 1830 u8 mode = 0;
1da177e4 1831
1da177e4
LT		 1832 if (dtr)
1833 mode |= DTR_ON;
1834 if (rts)
1835 mode |= RTS_ON;
b4173f45
JS		 1836 port->lineCtrl = mode;
1837 moxafunc(port->tableAddr, FC_LineControl, mode);
1da177e4
LT		 1838}
1839
b4173f45
JS		 1840static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
1841 int txflow, int rxflow, int txany)
1da177e4 1842{
b4173f45 1843 int mode = 0;
1da177e4 1844
1da177e4
LT		 1845 if (rts)
1846 mode |= RTS_FlowCtl;
1847 if (cts)
1848 mode |= CTS_FlowCtl;
1849 if (txflow)
1850 mode |= Tx_FlowCtl;
1851 if (rxflow)
1852 mode |= Rx_FlowCtl;
1853 if (txany)
1854 mode |= IXM_IXANY;
b4173f45 1855 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
1da177e4
LT		 1856}
1857
b4173f45 1858static int MoxaPortLineStatus(struct moxa_port *port)
1da177e4
LT		 1859{
1860 void __iomem *ofsAddr;
1861 int val;
1862
b4173f45 1863 ofsAddr = port->tableAddr;
f5c5a36d
AC		 1864 if (MOXA_IS_320(port->board))
1865 val = moxafuncret(ofsAddr, FC_LineStatus, 0);
1866 else
1da177e4 1867 val = readw(ofsAddr + FlagStat) >> 4;
1da177e4 1868 val &= 0x0B;
7bcf97d1 1869 if (val & 8)
1da177e4 1870 val |= 4;
7bcf97d1 1871 moxa_new_dcdstate(port, val & 8);
1da177e4 1872 val &= 7;
7bcf97d1 1873 return val;
1da177e4
LT		 1874}
1875
d450b5a0 1876static int MoxaPortWriteData(struct tty_struct *tty,
2108eba5 1877 const unsigned char *buffer, int len)
1da177e4 1878{
d450b5a0 1879 struct moxa_port *port = tty->driver_data;
1da177e4 1880 void __iomem *baseAddr, *ofsAddr, *ofs;
2108eba5
JS		 1881 unsigned int c, total;
1882 u16 head, tail, tx_mask, spage, epage;
1883 u16 pageno, pageofs, bufhead;
1da177e4 1884
b4173f45
JS		 1885 ofsAddr = port->tableAddr;
1886 baseAddr = port->board->basemem;
1da177e4
LT		 1887 tx_mask = readw(ofsAddr + TX_mask);
1888 spage = readw(ofsAddr + Page_txb);
1889 epage = readw(ofsAddr + EndPage_txb);
1890 tail = readw(ofsAddr + TXwptr);
1891 head = readw(ofsAddr + TXrptr);
2108eba5 1892 c = (head > tail) ? (head - tail - 1) : (head - tail + tx_mask);
1da177e4
LT		 1893 if (c > len)
1894 c = len;
9de6a51f 1895 moxaLog.txcnt[port->port.tty->index] += c;
1da177e4
LT		 1896 total = c;
1897 if (spage == epage) {
1898 bufhead = readw(ofsAddr + Ofs_txb);
1899 writew(spage, baseAddr + Control_reg);
1900 while (c > 0) {
1901 if (head > tail)
1902 len = head - tail - 1;
1903 else
1904 len = tx_mask + 1 - tail;
1905 len = (c > len) ? len : c;
1906 ofs = baseAddr + DynPage_addr + bufhead + tail;
2108eba5
JS		 1907 memcpy_toio(ofs, buffer, len);
1908 buffer += len;
1da177e4
LT		 1909 tail = (tail + len) & tx_mask;
1910 c -= len;
1911 }
1da177e4 1912 } else {
1da177e4
LT		 1913 pageno = spage + (tail >> 13);
1914 pageofs = tail & Page_mask;
2108eba5
JS		 1915 while (c > 0) {
1916 len = Page_size - pageofs;
1917 if (len > c)
1918 len = c;
1da177e4
LT		 1919 writeb(pageno, baseAddr + Control_reg);
1920 ofs = baseAddr + DynPage_addr + pageofs;
2108eba5
JS		 1921 memcpy_toio(ofs, buffer, len);
1922 buffer += len;
1da177e4
LT		 1923 if (++pageno == epage)
1924 pageno = spage;
1925 pageofs = 0;
2108eba5
JS		 1926 c -= len;
1927 }
1928 tail = (tail + total) & tx_mask;
1da177e4 1929 }
2108eba5 1930 writew(tail, ofsAddr + TXwptr);
1da177e4 1931 writeb(1, ofsAddr + CD180TXirq); /* start to send */
2108eba5 1932 return total;
1da177e4
LT		 1933}
1934
7bcf97d1 1935static int MoxaPortReadData(struct moxa_port *port)
1da177e4 1936{
9de6a51f 1937 struct tty_struct *tty = port->port.tty;
2108eba5 1938 unsigned char *dst;
1da177e4 1939 void __iomem *baseAddr, *ofsAddr, *ofs;
2108eba5
JS		 1940 unsigned int count, len, total;
1941 u16 tail, rx_mask, spage, epage;
1942 u16 pageno, pageofs, bufhead, head;
1da177e4 1943
b4173f45
JS		 1944 ofsAddr = port->tableAddr;
1945 baseAddr = port->board->basemem;
1da177e4
LT		 1946 head = readw(ofsAddr + RXrptr);
1947 tail = readw(ofsAddr + RXwptr);
1948 rx_mask = readw(ofsAddr + RX_mask);
1949 spage = readw(ofsAddr + Page_rxb);
1950 epage = readw(ofsAddr + EndPage_rxb);
2108eba5 1951 count = (tail >= head) ? (tail - head) : (tail - head + rx_mask + 1);
1da177e4 1952 if (count == 0)
33f0f88f 1953 return 0;
1da177e4 1954
33f0f88f 1955 total = count;
7bcf97d1 1956 moxaLog.rxcnt[tty->index] += total;
1da177e4
LT		 1957 if (spage == epage) {
1958 bufhead = readw(ofsAddr + Ofs_rxb);
1959 writew(spage, baseAddr + Control_reg);
1960 while (count > 0) {
1da177e4 1961 ofs = baseAddr + DynPage_addr + bufhead + head;
2108eba5
JS		 1962 len = (tail >= head) ? (tail - head) :
1963 (rx_mask + 1 - head);
1964 len = tty_prepare_flip_string(tty, &dst,
1965 min(len, count));
1966 memcpy_fromio(dst, ofs, len);
1da177e4
LT		 1967 head = (head + len) & rx_mask;
1968 count -= len;
1969 }
1da177e4 1970 } else {
1da177e4
LT		 1971 pageno = spage + (head >> 13);
1972 pageofs = head & Page_mask;
2108eba5 1973 while (count > 0) {
1da177e4
LT		 1974 writew(pageno, baseAddr + Control_reg);
1975 ofs = baseAddr + DynPage_addr + pageofs;
2108eba5
JS		 1976 len = tty_prepare_flip_string(tty, &dst,
1977 min(Page_size - pageofs, count));
1978 memcpy_fromio(dst, ofs, len);
1979
1980 count -= len;
1981 pageofs = (pageofs + len) & Page_mask;
1982 if (pageofs == 0 && ++pageno == epage)
1da177e4 1983 pageno = spage;
2108eba5
JS		 1984 }
1985 head = (head + total) & rx_mask;
1da177e4 1986 }
2108eba5
JS		 1987 writew(head, ofsAddr + RXrptr);
1988 if (readb(ofsAddr + FlagStat) & Xoff_state) {
1da177e4 1989 moxaLowWaterChk = 1;
b4173f45 1990 port->lowChkFlag = 1;
1da177e4 1991 }
2108eba5 1992 return total;
1da177e4
LT		 1993}
1994
1995
b4173f45 1996static int MoxaPortTxQueue(struct moxa_port *port)
1da177e4 1997{
b4173f45 1998 void __iomem *ofsAddr = port->tableAddr;
2108eba5 1999 u16 rptr, wptr, mask;
1da177e4 2000
1da177e4
LT		 2001 rptr = readw(ofsAddr + TXrptr);
2002 wptr = readw(ofsAddr + TXwptr);
2003 mask = readw(ofsAddr + TX_mask);
2108eba5 2004 return (wptr - rptr) & mask;
1da177e4
LT		 2005}
2006
b4173f45 2007static int MoxaPortTxFree(struct moxa_port *port)
1da177e4 2008{
b4173f45 2009 void __iomem *ofsAddr = port->tableAddr;
2108eba5 2010 u16 rptr, wptr, mask;
1da177e4 2011
1da177e4
LT		 2012 rptr = readw(ofsAddr + TXrptr);
2013 wptr = readw(ofsAddr + TXwptr);
2014 mask = readw(ofsAddr + TX_mask);
2108eba5 2015 return mask - ((wptr - rptr) & mask);
1da177e4
LT		 2016}
2017
b4173f45 2018static int MoxaPortRxQueue(struct moxa_port *port)
1da177e4 2019{
b4173f45 2020 void __iomem *ofsAddr = port->tableAddr;
2108eba5 2021 u16 rptr, wptr, mask;
1da177e4 2022
1da177e4
LT		 2023 rptr = readw(ofsAddr + RXrptr);
2024 wptr = readw(ofsAddr + RXwptr);
2025 mask = readw(ofsAddr + RX_mask);
2108eba5 2026 return (wptr - rptr) & mask;
1da177e4
LT		 2027}
2028
b4173f45 2029static void MoxaPortTxDisable(struct moxa_port *port)
1da177e4 2030{
b4173f45 2031 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
1da177e4
LT		 2032}
2033
b4173f45 2034static void MoxaPortTxEnable(struct moxa_port *port)
1da177e4 2035{
b4173f45 2036 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
1da177e4
LT		 2037}
2038
8f8ecbad 2039static int moxa_get_serial_info(struct moxa_port *info,
eaa95a8d 2040 struct serial_struct __user *retinfo)
1da177e4 2041{
eaa95a8d
JS		 2042 struct serial_struct tmp = {
2043 .type = info->type,
9de6a51f
AC		 2044 .line = info->port.tty->index,
2045 .flags = info->port.flags,
eaa95a8d 2046 .baud_base = 921600,
44b7d1b3 2047 .close_delay = info->port.close_delay
eaa95a8d
JS		 2048 };
2049 return copy_to_user(retinfo, &tmp, sizeof(*retinfo)) ? -EFAULT : 0;
1da177e4
LT		 2050}
2051
2052
8f8ecbad 2053static int moxa_set_serial_info(struct moxa_port *info,
eaa95a8d 2054 struct serial_struct __user *new_info)
1da177e4
LT		 2055{
2056 struct serial_struct new_serial;
2057
eaa95a8d 2058 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1da177e4
LT		 2059 return -EFAULT;
2060
eaa95a8d
JS		 2061 if (new_serial.irq != 0 || new_serial.port != 0 ||
2062 new_serial.custom_divisor != 0 ||
2063 new_serial.baud_base != 921600)
2064 return -EPERM;
1da177e4
LT		 2065
2066 if (!capable(CAP_SYS_ADMIN)) {
2067 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
9de6a51f 2068 (info->port.flags & ~ASYNC_USR_MASK)))
eaa95a8d
JS		 2069 return -EPERM;
2070 } else
44b7d1b3 2071 info->port.close_delay = new_serial.close_delay * HZ / 100;
1da177e4
LT		 2072
2073 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
9de6a51f 2074 new_serial.flags |= (info->port.flags & ASYNC_FLAGS);
1da177e4 2075
eaa95a8d 2076 MoxaSetFifo(info, new_serial.type == PORT_16550A);
1da177e4
LT		 2077
2078 info->type = new_serial.type;
eaa95a8d 2079 return 0;
1da177e4
LT		 2080}
2081
2082
2083
2084/*****************************************************************************
2085 * Static local functions: *
2086 *****************************************************************************/
1da177e4 2087
b4173f45 2088static void MoxaSetFifo(struct moxa_port *port, int enable)
1da177e4 2089{
b4173f45 2090 void __iomem *ofsAddr = port->tableAddr;
1da177e4
LT		 2091
2092 if (!enable) {
2093 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2094 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2095 } else {
2096 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2097 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
2098 }
2099}
Linux kernel - Deliverables
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