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Char: moxa, remove static isa support
[linux-2.6-block.git] / drivers / char / moxa.c
CommitLineData
1da177e4
LT		 1/*****************************************************************************/
2/*
3 * moxa.c -- MOXA Intellio family multiport serial driver.
4 *
5 * Copyright (C) 1999-2000 Moxa Technologies (support@moxa.com.tw).
6 *
7 * This code is loosely based on the Linux serial driver, written by
8 * Linus Torvalds, Theodore T'so and others.
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
1da177e4
LT		 14 */
15
16/*
17 * MOXA Intellio Series Driver
18 * for : LINUX
19 * date : 1999/1/7
20 * version : 5.1
21 */
22
1da177e4
LT		 23#include <linux/module.h>
24#include <linux/types.h>
25#include <linux/mm.h>
26#include <linux/ioport.h>
27#include <linux/errno.h>
28#include <linux/signal.h>
29#include <linux/sched.h>
30#include <linux/timer.h>
31#include <linux/interrupt.h>
32#include <linux/tty.h>
33#include <linux/tty_flip.h>
34#include <linux/major.h>
35#include <linux/string.h>
36#include <linux/fcntl.h>
37#include <linux/ptrace.h>
38#include <linux/serial.h>
39#include <linux/tty_driver.h>
40#include <linux/delay.h>
41#include <linux/pci.h>
42#include <linux/init.h>
43#include <linux/bitops.h>
95e07914 44#include <linux/completion.h>
1da177e4
LT		 45
46#include <asm/system.h>
47#include <asm/io.h>
48#include <asm/uaccess.h>
49
11324edd 50#define MOXA_VERSION "5.1k"
1da177e4 51
11324edd
JS		 52#define MOXAMAJOR 172
53#define MOXACUMAJOR 173
1da177e4 54
11324edd 55#define MAX_BOARDS 4 /* Don't change this value */
1da177e4 56#define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
11324edd 57#define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
1da177e4
LT		 58
59/*
60 * Define the Moxa PCI vendor and device IDs.
61 */
11324edd
JS		 62#define MOXA_BUS_TYPE_ISA 0
63#define MOXA_BUS_TYPE_PCI 1
1da177e4 64
1da177e4
LT		 65enum {
66 MOXA_BOARD_C218_PCI = 1,
67 MOXA_BOARD_C218_ISA,
68 MOXA_BOARD_C320_PCI,
69 MOXA_BOARD_C320_ISA,
70 MOXA_BOARD_CP204J,
71};
72
73static char *moxa_brdname[] =
74{
75 "C218 Turbo PCI series",
76 "C218 Turbo ISA series",
77 "C320 Turbo PCI series",
78 "C320 Turbo ISA series",
79 "CP-204J series",
80};
81
82#ifdef CONFIG_PCI
83static struct pci_device_id moxa_pcibrds[] = {
5ebb4078
JS		 84 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218),
85 .driver_data = MOXA_BOARD_C218_PCI },
86 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320),
87 .driver_data = MOXA_BOARD_C320_PCI },
88 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J),
89 .driver_data = MOXA_BOARD_CP204J },
1da177e4
LT		 90 { 0 }
91};
92MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
93#endif /* CONFIG_PCI */
94
8f8ecbad 95static struct moxa_board_conf {
1da177e4
LT		 96 int boardType;
97 int numPorts;
98 unsigned long baseAddr;
99 int busType;
8f8ecbad
JS		 100
101 int loadstat;
102
103 void __iomem *basemem;
104 void __iomem *intNdx;
105 void __iomem *intPend;
106 void __iomem *intTable;
107} moxa_boards[MAX_BOARDS];
108
109struct mxser_mstatus {
110 tcflag_t cflag;
111 int cts;
112 int dsr;
113 int ri;
114 int dcd;
9dff89cd 115};
1da177e4 116
8f8ecbad
JS		 117struct moxaq_str {
118 int inq;
119 int outq;
120};
1da177e4 121
8f8ecbad 122struct moxa_port {
1da177e4
LT		 123 int type;
124 int port;
125 int close_delay;
126 unsigned short closing_wait;
127 int count;
128 int blocked_open;
129 long event; /* long req'd for set_bit --RR */
130 int asyncflags;
131 unsigned long statusflags;
132 struct tty_struct *tty;
133 int cflag;
134 wait_queue_head_t open_wait;
95e07914 135 struct completion close_wait;
1da177e4 136
8f8ecbad 137 struct timer_list emptyTimer;
1da177e4 138
8f8ecbad
JS		 139 char chkPort;
140 char lineCtrl;
141 void __iomem *tableAddr;
142 long curBaud;
143 char DCDState;
144 char lowChkFlag;
145
146 ushort breakCnt;
147};
1da177e4
LT		 148
149/* statusflags */
150#define TXSTOPPED 0x1
151#define LOWWAIT 0x2
152#define EMPTYWAIT 0x4
153#define THROTTLE 0x8
154
1da177e4
LT		 155#define SERIAL_DO_RESTART
156
1da177e4
LT		 157#define WAKEUP_CHARS 256
158
1da177e4
LT		 159static int ttymajor = MOXAMAJOR;
160/* Variables for insmod */
161#ifdef MODULE
9fa372a8
JS		 162static int baseaddr[4];
163static int type[4];
164static int numports[4];
1da177e4
LT		 165#endif
166
167MODULE_AUTHOR("William Chen");
168MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
169MODULE_LICENSE("GPL");
170#ifdef MODULE
171module_param_array(type, int, NULL, 0);
172module_param_array(baseaddr, int, NULL, 0);
173module_param_array(numports, int, NULL, 0);
174#endif
175module_param(ttymajor, int, 0);
1da177e4 176
1da177e4
LT		 177/*
178 * static functions:
179 */
1da177e4
LT		 180static int moxa_open(struct tty_struct *, struct file *);
181static void moxa_close(struct tty_struct *, struct file *);
182static int moxa_write(struct tty_struct *, const unsigned char *, int);
183static int moxa_write_room(struct tty_struct *);
184static void moxa_flush_buffer(struct tty_struct *);
185static int moxa_chars_in_buffer(struct tty_struct *);
186static void moxa_flush_chars(struct tty_struct *);
187static void moxa_put_char(struct tty_struct *, unsigned char);
188static int moxa_ioctl(struct tty_struct *, struct file *, unsigned int, unsigned long);
189static void moxa_throttle(struct tty_struct *);
190static void moxa_unthrottle(struct tty_struct *);
606d099c 191static void moxa_set_termios(struct tty_struct *, struct ktermios *);
1da177e4
LT		 192static void moxa_stop(struct tty_struct *);
193static void moxa_start(struct tty_struct *);
194static void moxa_hangup(struct tty_struct *);
195static int moxa_tiocmget(struct tty_struct *tty, struct file *file);
196static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
197 unsigned int set, unsigned int clear);
198static void moxa_poll(unsigned long);
db1acaa6 199static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
6f56b658 200static int moxa_block_till_ready(struct tty_struct *, struct file *,
8f8ecbad 201 struct moxa_port *);
6f56b658
JS		 202static void moxa_setup_empty_event(struct tty_struct *);
203static void moxa_check_xmit_empty(unsigned long);
204static void moxa_shut_down(struct moxa_port *);
205static void moxa_receive_data(struct moxa_port *);
1da177e4
LT		 206/*
207 * moxa board interface functions:
208 */
209static void MoxaDriverInit(void);
210static int MoxaDriverIoctl(unsigned int, unsigned long, int);
211static int MoxaDriverPoll(void);
212static int MoxaPortsOfCard(int);
213static int MoxaPortIsValid(int);
214static void MoxaPortEnable(int);
215static void MoxaPortDisable(int);
216static long MoxaPortGetMaxBaud(int);
217static long MoxaPortSetBaud(int, long);
606d099c 218static int MoxaPortSetTermio(int, struct ktermios *, speed_t);
1da177e4
LT		 219static int MoxaPortGetLineOut(int, int *, int *);
220static void MoxaPortLineCtrl(int, int, int);
221static void MoxaPortFlowCtrl(int, int, int, int, int, int);
222static int MoxaPortLineStatus(int);
223static int MoxaPortDCDChange(int);
224static int MoxaPortDCDON(int);
225static void MoxaPortFlushData(int, int);
226static int MoxaPortWriteData(int, unsigned char *, int);
33f0f88f 227static int MoxaPortReadData(int, struct tty_struct *tty);
1da177e4
LT		 228static int MoxaPortTxQueue(int);
229static int MoxaPortRxQueue(int);
230static int MoxaPortTxFree(int);
231static void MoxaPortTxDisable(int);
232static void MoxaPortTxEnable(int);
233static int MoxaPortResetBrkCnt(int);
234static void MoxaPortSendBreak(int, int);
8f8ecbad
JS		 235static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *);
236static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *);
1da177e4
LT		 237static void MoxaSetFifo(int port, int enable);
238
b68e31d0 239static const struct tty_operations moxa_ops = {
1da177e4
LT		 240 .open = moxa_open,
241 .close = moxa_close,
242 .write = moxa_write,
243 .write_room = moxa_write_room,
244 .flush_buffer = moxa_flush_buffer,
245 .chars_in_buffer = moxa_chars_in_buffer,
246 .flush_chars = moxa_flush_chars,
247 .put_char = moxa_put_char,
248 .ioctl = moxa_ioctl,
249 .throttle = moxa_throttle,
250 .unthrottle = moxa_unthrottle,
251 .set_termios = moxa_set_termios,
252 .stop = moxa_stop,
253 .start = moxa_start,
254 .hangup = moxa_hangup,
255 .tiocmget = moxa_tiocmget,
256 .tiocmset = moxa_tiocmset,
257};
258
aa7e5221 259static struct tty_driver *moxaDriver;
8f8ecbad 260static struct moxa_port moxa_ports[MAX_PORTS];
aa7e5221 261static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
34af946a 262static DEFINE_SPINLOCK(moxa_lock);
33f0f88f 263
1da177e4 264#ifdef CONFIG_PCI
9cde5bf0
JS		 265static int __devinit moxa_pci_probe(struct pci_dev *pdev,
266 const struct pci_device_id *ent)
1da177e4 267{
9cde5bf0
JS		 268 struct moxa_board_conf *board;
269 unsigned int i;
270 int board_type = ent->driver_data;
271 int retval;
272
273 retval = pci_enable_device(pdev);
7aeb95da
JS		 274 if (retval) {
275 dev_err(&pdev->dev, "can't enable pci device\n");
9cde5bf0 276 goto err;
7aeb95da 277 }
9cde5bf0
JS		 278
279 for (i = 0; i < MAX_BOARDS; i++)
280 if (moxa_boards[i].basemem == NULL)
281 break;
282
283 retval = -ENODEV;
284 if (i >= MAX_BOARDS) {
7aeb95da 285 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
9cde5bf0
JS		 286 "found. Board is ignored.\n", MAX_BOARDS);
287 goto err;
288 }
289
290 board = &moxa_boards[i];
291 board->basemem = pci_iomap(pdev, 2, 0x4000);
7aeb95da
JS		 292 if (board->basemem == NULL) {
293 dev_err(&pdev->dev, "can't remap io space 2\n");
9cde5bf0 294 goto err;
7aeb95da 295 }
9cde5bf0 296
1da177e4
LT		 297 board->boardType = board_type;
298 switch (board_type) {
299 case MOXA_BOARD_C218_ISA:
300 case MOXA_BOARD_C218_PCI:
301 board->numPorts = 8;
302 break;
303
304 case MOXA_BOARD_CP204J:
305 board->numPorts = 4;
306 break;
307 default:
308 board->numPorts = 0;
309 break;
310 }
311 board->busType = MOXA_BUS_TYPE_PCI;
a784bf7c 312
9cde5bf0 313 pci_set_drvdata(pdev, board);
1da177e4
LT		 314
315 return (0);
9cde5bf0
JS		 316err:
317 return retval;
318}
319
320static void __devexit moxa_pci_remove(struct pci_dev *pdev)
321{
322 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
323
324 pci_iounmap(pdev, brd->basemem);
325 brd->basemem = NULL;
1da177e4 326}
a784bf7c
JS		 327
328static struct pci_driver moxa_pci_driver = {
329 .name = "moxa",
330 .id_table = moxa_pcibrds,
331 .probe = moxa_pci_probe,
332 .remove = __devexit_p(moxa_pci_remove)
333};
1da177e4
LT		 334#endif /* CONFIG_PCI */
335
336static int __init moxa_init(void)
337{
37794952 338 int i, numBoards = 0, retval = 0;
8f8ecbad 339 struct moxa_port *ch;
1da177e4 340
7aeb95da
JS		 341 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
342 MOXA_VERSION);
1da177e4
LT		 343 moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
344 if (!moxaDriver)
345 return -ENOMEM;
346
1da177e4 347 moxaDriver->owner = THIS_MODULE;
9b4e3b13 348 moxaDriver->name = "ttyMX";
1da177e4
LT		 349 moxaDriver->major = ttymajor;
350 moxaDriver->minor_start = 0;
351 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
352 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
353 moxaDriver->init_termios = tty_std_termios;
1da177e4 354 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
606d099c
AC		 355 moxaDriver->init_termios.c_ispeed = 9600;
356 moxaDriver->init_termios.c_ospeed = 9600;
1da177e4
LT		 357 moxaDriver->flags = TTY_DRIVER_REAL_RAW;
358 tty_set_operations(moxaDriver, &moxa_ops);
359
8f8ecbad 360 for (i = 0, ch = moxa_ports; i < MAX_PORTS; i++, ch++) {
1da177e4
LT		 361 ch->type = PORT_16550A;
362 ch->port = i;
1da177e4
LT		 363 ch->close_delay = 5 * HZ / 10;
364 ch->closing_wait = 30 * HZ;
1da177e4
LT		 365 ch->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
366 init_waitqueue_head(&ch->open_wait);
95e07914 367 init_completion(&ch->close_wait);
8f8ecbad 368
6f56b658 369 setup_timer(&ch->emptyTimer, moxa_check_xmit_empty,
8f8ecbad 370 (unsigned long)ch);
1da177e4
LT		 371 }
372
7aeb95da 373 pr_debug("Moxa tty devices major number = %d\n", ttymajor);
1da177e4
LT		 374
375 if (tty_register_driver(moxaDriver)) {
376 printk(KERN_ERR "Couldn't install MOXA Smartio family driver !\n");
377 put_tty_driver(moxaDriver);
378 return -1;
379 }
1da177e4 380
aa7e5221 381 mod_timer(&moxaTimer, jiffies + HZ / 50);
1da177e4 382
1da177e4
LT		 383 /* Find the boards defined form module args. */
384#ifdef MODULE
385 for (i = 0; i < MAX_BOARDS; i++) {
386 if ((type[i] == MOXA_BOARD_C218_ISA) ||
387 (type[i] == MOXA_BOARD_C320_ISA)) {
7aeb95da
JS		 388 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
389 numBoards + 1, moxa_brdname[type[i] - 1],
390 (unsigned long)baseaddr[i]);
1da177e4 391 if (numBoards >= MAX_BOARDS) {
7aeb95da
JS		 392 printk(KERN_WARNING "More than %d MOXA "
393 "Intellio family boards found. Board "
394 "is ignored.\n", MAX_BOARDS);
1da177e4
LT		 395 continue;
396 }
397 moxa_boards[numBoards].boardType = type[i];
37794952 398 if (type[i] == MOXA_BOARD_C218_ISA)
1da177e4
LT		 399 moxa_boards[numBoards].numPorts = 8;
400 else
401 moxa_boards[numBoards].numPorts = numports[i];
402 moxa_boards[numBoards].busType = MOXA_BUS_TYPE_ISA;
403 moxa_boards[numBoards].baseAddr = baseaddr[i];
404 numBoards++;
405 }
406 }
407#endif
a784bf7c 408
1da177e4 409#ifdef CONFIG_PCI
a784bf7c
JS		 410 retval = pci_register_driver(&moxa_pci_driver);
411 if (retval) {
412 printk(KERN_ERR "Can't register moxa pci driver!\n");
413 if (numBoards)
414 retval = 0;
1da177e4
LT		 415 }
416#endif
a784bf7c 417
1da177e4 418 for (i = 0; i < numBoards; i++) {
8f8ecbad
JS		 419 moxa_boards[i].basemem = ioremap(moxa_boards[i].baseAddr,
420 0x4000);
1da177e4
LT		 421 }
422
a784bf7c 423 return retval;
1da177e4
LT		 424}
425
426static void __exit moxa_exit(void)
427{
428 int i;
429
c251ae0d 430 del_timer_sync(&moxaTimer);
1da177e4
LT		 431
432 for (i = 0; i < MAX_PORTS; i++)
8f8ecbad 433 del_timer_sync(&moxa_ports[i].emptyTimer);
1da177e4
LT		 434
435 if (tty_unregister_driver(moxaDriver))
7aeb95da
JS		 436 printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
437 "serial driver\n");
1da177e4 438 put_tty_driver(moxaDriver);
86fbf148 439
9cde5bf0 440#ifdef CONFIG_PCI
a784bf7c 441 pci_unregister_driver(&moxa_pci_driver);
9cde5bf0 442#endif
a784bf7c
JS		 443
444 for (i = 0; i < MAX_BOARDS; i++)
8f8ecbad
JS		 445 if (moxa_boards[i].basemem)
446 iounmap(moxa_boards[i].basemem);
1da177e4
LT		 447}
448
449module_init(moxa_init);
450module_exit(moxa_exit);
451
1da177e4
LT		 452static int moxa_open(struct tty_struct *tty, struct file *filp)
453{
8f8ecbad 454 struct moxa_port *ch;
1da177e4
LT		 455 int port;
456 int retval;
1da177e4 457
11324edd 458 port = tty->index;
1da177e4
LT		 459 if (port == MAX_PORTS) {
460 return (0);
461 }
462 if (!MoxaPortIsValid(port)) {
463 tty->driver_data = NULL;
464 return (-ENODEV);
465 }
1da177e4 466
8f8ecbad 467 ch = &moxa_ports[port];
1da177e4
LT		 468 ch->count++;
469 tty->driver_data = ch;
470 ch->tty = tty;
471 if (!(ch->asyncflags & ASYNC_INITIALIZED)) {
472 ch->statusflags = 0;
db1acaa6 473 moxa_set_tty_param(tty, tty->termios);
1da177e4
LT		 474 MoxaPortLineCtrl(ch->port, 1, 1);
475 MoxaPortEnable(ch->port);
476 ch->asyncflags |= ASYNC_INITIALIZED;
477 }
6f56b658 478 retval = moxa_block_till_ready(tty, filp, ch);
1da177e4
LT		 479
480 moxa_unthrottle(tty);
481
482 if (ch->type == PORT_16550A) {
483 MoxaSetFifo(ch->port, 1);
484 } else {
485 MoxaSetFifo(ch->port, 0);
486 }
487
488 return (retval);
489}
490
491static void moxa_close(struct tty_struct *tty, struct file *filp)
492{
8f8ecbad 493 struct moxa_port *ch;
1da177e4
LT		 494 int port;
495
11324edd 496 port = tty->index;
1da177e4
LT		 497 if (port == MAX_PORTS) {
498 return;
499 }
500 if (!MoxaPortIsValid(port)) {
7aeb95da 501 pr_debug("Invalid portno in moxa_close\n");
1da177e4
LT		 502 tty->driver_data = NULL;
503 return;
504 }
505 if (tty->driver_data == NULL) {
506 return;
507 }
508 if (tty_hung_up_p(filp)) {
509 return;
510 }
8f8ecbad 511 ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 512
513 if ((tty->count == 1) && (ch->count != 1)) {
7aeb95da
JS		 514 printk(KERN_WARNING "moxa_close: bad serial port count; "
515 "tty->count is 1, ch->count is %d\n", ch->count);
1da177e4
LT		 516 ch->count = 1;
517 }
518 if (--ch->count < 0) {
7aeb95da
JS		 519 printk(KERN_WARNING "moxa_close: bad serial port count, "
520 "device=%s\n", tty->name);
1da177e4
LT		 521 ch->count = 0;
522 }
523 if (ch->count) {
524 return;
525 }
526 ch->asyncflags |= ASYNC_CLOSING;
527
528 ch->cflag = tty->termios->c_cflag;
529 if (ch->asyncflags & ASYNC_INITIALIZED) {
6f56b658 530 moxa_setup_empty_event(tty);
1da177e4 531 tty_wait_until_sent(tty, 30 * HZ); /* 30 seconds timeout */
8f8ecbad 532 del_timer_sync(&moxa_ports[ch->port].emptyTimer);
1da177e4 533 }
6f56b658 534 moxa_shut_down(ch);
1da177e4
LT		 535 MoxaPortFlushData(port, 2);
536
537 if (tty->driver->flush_buffer)
538 tty->driver->flush_buffer(tty);
539 tty_ldisc_flush(tty);
540
541 tty->closing = 0;
542 ch->event = 0;
543 ch->tty = NULL;
544 if (ch->blocked_open) {
545 if (ch->close_delay) {
546 msleep_interruptible(jiffies_to_msecs(ch->close_delay));
547 }
548 wake_up_interruptible(&ch->open_wait);
549 }
550 ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
95e07914 551 complete_all(&ch->close_wait);
1da177e4
LT		 552}
553
554static int moxa_write(struct tty_struct *tty,
555 const unsigned char *buf, int count)
556{
8f8ecbad 557 struct moxa_port *ch;
1da177e4
LT		 558 int len, port;
559 unsigned long flags;
560
8f8ecbad 561 ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 562 if (ch == NULL)
563 return (0);
564 port = ch->port;
33f0f88f
AC		 565
566 spin_lock_irqsave(&moxa_lock, flags);
1da177e4 567 len = MoxaPortWriteData(port, (unsigned char *) buf, count);
33f0f88f 568 spin_unlock_irqrestore(&moxa_lock, flags);
1da177e4
LT		 569
570 /*********************************************
571 if ( !(ch->statusflags & LOWWAIT) &&
572 ((len != count) || (MoxaPortTxFree(port) <= 100)) )
573 ************************************************/
574 ch->statusflags |= LOWWAIT;
575 return (len);
576}
577
578static int moxa_write_room(struct tty_struct *tty)
579{
8f8ecbad 580 struct moxa_port *ch;
1da177e4
LT		 581
582 if (tty->stopped)
583 return (0);
8f8ecbad 584 ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 585 if (ch == NULL)
586 return (0);
587 return (MoxaPortTxFree(ch->port));
588}
589
590static void moxa_flush_buffer(struct tty_struct *tty)
591{
8f8ecbad 592 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 593
594 if (ch == NULL)
595 return;
596 MoxaPortFlushData(ch->port, 1);
597 tty_wakeup(tty);
598}
599
600static int moxa_chars_in_buffer(struct tty_struct *tty)
601{
602 int chars;
8f8ecbad 603 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 604
605 /*
606 * Sigh...I have to check if driver_data is NULL here, because
607 * if an open() fails, the TTY subsystem eventually calls
608 * tty_wait_until_sent(), which calls the driver's chars_in_buffer()
609 * routine. And since the open() failed, we return 0 here. TDJ
610 */
611 if (ch == NULL)
612 return (0);
613 chars = MoxaPortTxQueue(ch->port);
614 if (chars) {
615 /*
616 * Make it possible to wakeup anything waiting for output
617 * in tty_ioctl.c, etc.
618 */
619 if (!(ch->statusflags & EMPTYWAIT))
6f56b658 620 moxa_setup_empty_event(tty);
1da177e4
LT		 621 }
622 return (chars);
623}
624
625static void moxa_flush_chars(struct tty_struct *tty)
626{
627 /*
628 * Don't think I need this, because this is called to empty the TX
629 * buffer for the 16450, 16550, etc.
630 */
631}
632
633static void moxa_put_char(struct tty_struct *tty, unsigned char c)
634{
8f8ecbad 635 struct moxa_port *ch;
1da177e4
LT		 636 int port;
637 unsigned long flags;
638
8f8ecbad 639 ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 640 if (ch == NULL)
641 return;
642 port = ch->port;
33f0f88f 643 spin_lock_irqsave(&moxa_lock, flags);
f204d267 644 MoxaPortWriteData(port, &c, 1);
33f0f88f 645 spin_unlock_irqrestore(&moxa_lock, flags);
1da177e4
LT		 646 /************************************************
647 if ( !(ch->statusflags & LOWWAIT) && (MoxaPortTxFree(port) <= 100) )
648 *************************************************/
649 ch->statusflags |= LOWWAIT;
650}
651
652static int moxa_tiocmget(struct tty_struct *tty, struct file *file)
653{
8f8ecbad 654 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 655 int port;
656 int flag = 0, dtr, rts;
657
11324edd 658 port = tty->index;
1da177e4
LT		 659 if ((port != MAX_PORTS) && (!ch))
660 return (-EINVAL);
661
662 MoxaPortGetLineOut(ch->port, &dtr, &rts);
663 if (dtr)
664 flag |= TIOCM_DTR;
665 if (rts)
666 flag |= TIOCM_RTS;
667 dtr = MoxaPortLineStatus(ch->port);
668 if (dtr & 1)
669 flag |= TIOCM_CTS;
670 if (dtr & 2)
671 flag |= TIOCM_DSR;
672 if (dtr & 4)
673 flag |= TIOCM_CD;
674 return flag;
675}
676
677static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
678 unsigned int set, unsigned int clear)
679{
8f8ecbad 680 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 681 int port;
682 int dtr, rts;
683
11324edd 684 port = tty->index;
1da177e4
LT		 685 if ((port != MAX_PORTS) && (!ch))
686 return (-EINVAL);
687
688 MoxaPortGetLineOut(ch->port, &dtr, &rts);
689 if (set & TIOCM_RTS)
690 rts = 1;
691 if (set & TIOCM_DTR)
692 dtr = 1;
693 if (clear & TIOCM_RTS)
694 rts = 0;
695 if (clear & TIOCM_DTR)
696 dtr = 0;
697 MoxaPortLineCtrl(ch->port, dtr, rts);
698 return 0;
699}
700
701static int moxa_ioctl(struct tty_struct *tty, struct file *file,
702 unsigned int cmd, unsigned long arg)
703{
8f8ecbad 704 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 705 register int port;
706 void __user *argp = (void __user *)arg;
707 int retval;
708
11324edd 709 port = tty->index;
1da177e4
LT		 710 if ((port != MAX_PORTS) && (!ch))
711 return (-EINVAL);
712
713 switch (cmd) {
714 case TCSBRK: /* SVID version: non-zero arg --> no break */
715 retval = tty_check_change(tty);
716 if (retval)
717 return (retval);
6f56b658 718 moxa_setup_empty_event(tty);
1da177e4
LT		 719 tty_wait_until_sent(tty, 0);
720 if (!arg)
721 MoxaPortSendBreak(ch->port, 0);
722 return (0);
723 case TCSBRKP: /* support for POSIX tcsendbreak() */
724 retval = tty_check_change(tty);
725 if (retval)
726 return (retval);
6f56b658 727 moxa_setup_empty_event(tty);
1da177e4
LT		 728 tty_wait_until_sent(tty, 0);
729 MoxaPortSendBreak(ch->port, arg);
730 return (0);
731 case TIOCGSOFTCAR:
732 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *) argp);
733 case TIOCSSOFTCAR:
734 if(get_user(retval, (unsigned long __user *) argp))
735 return -EFAULT;
736 arg = retval;
737 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) |
738 (arg ? CLOCAL : 0));
739 if (C_CLOCAL(tty))
740 ch->asyncflags &= ~ASYNC_CHECK_CD;
741 else
742 ch->asyncflags |= ASYNC_CHECK_CD;
743 return (0);
744 case TIOCGSERIAL:
745 return moxa_get_serial_info(ch, argp);
746
747 case TIOCSSERIAL:
748 return moxa_set_serial_info(ch, argp);
749 default:
750 retval = MoxaDriverIoctl(cmd, arg, port);
751 }
752 return (retval);
753}
754
755static void moxa_throttle(struct tty_struct *tty)
756{
8f8ecbad 757 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 758
759 ch->statusflags |= THROTTLE;
760}
761
762static void moxa_unthrottle(struct tty_struct *tty)
763{
8f8ecbad 764 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 765
766 ch->statusflags &= ~THROTTLE;
767}
768
769static void moxa_set_termios(struct tty_struct *tty,
606d099c 770 struct ktermios *old_termios)
1da177e4 771{
8f8ecbad 772 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 773
774 if (ch == NULL)
775 return;
db1acaa6 776 moxa_set_tty_param(tty, old_termios);
1da177e4
LT		 777 if (!(old_termios->c_cflag & CLOCAL) &&
778 (tty->termios->c_cflag & CLOCAL))
779 wake_up_interruptible(&ch->open_wait);
780}
781
782static void moxa_stop(struct tty_struct *tty)
783{
8f8ecbad 784 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 785
786 if (ch == NULL)
787 return;
788 MoxaPortTxDisable(ch->port);
789 ch->statusflags |= TXSTOPPED;
790}
791
792
793static void moxa_start(struct tty_struct *tty)
794{
8f8ecbad 795 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 796
797 if (ch == NULL)
798 return;
799
800 if (!(ch->statusflags & TXSTOPPED))
801 return;
802
803 MoxaPortTxEnable(ch->port);
804 ch->statusflags &= ~TXSTOPPED;
805}
806
807static void moxa_hangup(struct tty_struct *tty)
808{
8f8ecbad 809 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 810
811 moxa_flush_buffer(tty);
6f56b658 812 moxa_shut_down(ch);
1da177e4
LT		 813 ch->event = 0;
814 ch->count = 0;
815 ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE;
816 ch->tty = NULL;
817 wake_up_interruptible(&ch->open_wait);
818}
819
820static void moxa_poll(unsigned long ignored)
821{
822 register int card;
8f8ecbad 823 struct moxa_port *ch;
1da177e4
LT		 824 struct tty_struct *tp;
825 int i, ports;
826
1da177e4
LT		 827 del_timer(&moxaTimer);
828
829 if (MoxaDriverPoll() < 0) {
aa7e5221 830 mod_timer(&moxaTimer, jiffies + HZ / 50);
1da177e4
LT		 831 return;
832 }
833 for (card = 0; card < MAX_BOARDS; card++) {
834 if ((ports = MoxaPortsOfCard(card)) <= 0)
835 continue;
8f8ecbad 836 ch = &moxa_ports[card * MAX_PORTS_PER_BOARD];
1da177e4
LT		 837 for (i = 0; i < ports; i++, ch++) {
838 if ((ch->asyncflags & ASYNC_INITIALIZED) == 0)
839 continue;
840 if (!(ch->statusflags & THROTTLE) &&
841 (MoxaPortRxQueue(ch->port) > 0))
6f56b658 842 moxa_receive_data(ch);
1da177e4
LT		 843 if ((tp = ch->tty) == 0)
844 continue;
845 if (ch->statusflags & LOWWAIT) {
846 if (MoxaPortTxQueue(ch->port) <= WAKEUP_CHARS) {
847 if (!tp->stopped) {
848 ch->statusflags &= ~LOWWAIT;
849 tty_wakeup(tp);
850 }
851 }
852 }
853 if (!I_IGNBRK(tp) && (MoxaPortResetBrkCnt(ch->port) > 0)) {
854 tty_insert_flip_char(tp, 0, TTY_BREAK);
855 tty_schedule_flip(tp);
856 }
857 if (MoxaPortDCDChange(ch->port)) {
858 if (ch->asyncflags & ASYNC_CHECK_CD) {
859 if (MoxaPortDCDON(ch->port))
860 wake_up_interruptible(&ch->open_wait);
861 else {
ba196df3
JS		 862 tty_hangup(tp);
863 wake_up_interruptible(&ch->open_wait);
864 ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE;
1da177e4
LT		 865 }
866 }
867 }
868 }
869 }
870
aa7e5221 871 mod_timer(&moxaTimer, jiffies + HZ / 50);
1da177e4
LT		 872}
873
874/******************************************************************************/
875
db1acaa6 876static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
1da177e4 877{
606d099c 878 register struct ktermios *ts;
8f8ecbad 879 struct moxa_port *ch;
db1acaa6 880 int rts, cts, txflow, rxflow, xany, baud;
1da177e4 881
8f8ecbad 882 ch = (struct moxa_port *) tty->driver_data;
1da177e4
LT		 883 ts = tty->termios;
884 if (ts->c_cflag & CLOCAL)
885 ch->asyncflags &= ~ASYNC_CHECK_CD;
886 else
887 ch->asyncflags |= ASYNC_CHECK_CD;
888 rts = cts = txflow = rxflow = xany = 0;
889 if (ts->c_cflag & CRTSCTS)
890 rts = cts = 1;
891 if (ts->c_iflag & IXON)
892 txflow = 1;
893 if (ts->c_iflag & IXOFF)
894 rxflow = 1;
895 if (ts->c_iflag & IXANY)
896 xany = 1;
db1acaa6
AC		 897
898 /* Clear the features we don't support */
899 ts->c_cflag &= ~CMSPAR;
1da177e4 900 MoxaPortFlowCtrl(ch->port, rts, cts, txflow, rxflow, xany);
db1acaa6
AC		 901 baud = MoxaPortSetTermio(ch->port, ts, tty_get_baud_rate(tty));
902 if (baud == -1)
903 baud = tty_termios_baud_rate(old_termios);
904 /* Not put the baud rate into the termios data */
905 tty_encode_baud_rate(tty, baud, baud);
1da177e4
LT		 906}
907
6f56b658 908static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,
8f8ecbad 909 struct moxa_port *ch)
1da177e4
LT		 910{
911 DECLARE_WAITQUEUE(wait,current);
912 unsigned long flags;
913 int retval;
914 int do_clocal = C_CLOCAL(tty);
915
916 /*
917 * If the device is in the middle of being closed, then block
918 * until it's done, and then try again.
919 */
920 if (tty_hung_up_p(filp) || (ch->asyncflags & ASYNC_CLOSING)) {
921 if (ch->asyncflags & ASYNC_CLOSING)
95e07914 922 wait_for_completion_interruptible(&ch->close_wait);
1da177e4
LT		 923#ifdef SERIAL_DO_RESTART
924 if (ch->asyncflags & ASYNC_HUP_NOTIFY)
925 return (-EAGAIN);
926 else
927 return (-ERESTARTSYS);
928#else
929 return (-EAGAIN);
930#endif
931 }
932 /*
933 * If non-blocking mode is set, then make the check up front
934 * and then exit.
935 */
936 if (filp->f_flags & O_NONBLOCK) {
937 ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
938 return (0);
939 }
940 /*
941 * Block waiting for the carrier detect and the line to become free
942 */
943 retval = 0;
944 add_wait_queue(&ch->open_wait, &wait);
7aeb95da
JS		 945 pr_debug("block_til_ready before block: ttys%d, count = %d\n",
946 ch->port, ch->count);
33f0f88f 947 spin_lock_irqsave(&moxa_lock, flags);
1da177e4
LT		 948 if (!tty_hung_up_p(filp))
949 ch->count--;
1da177e4 950 ch->blocked_open++;
33f0f88f
AC		 951 spin_unlock_irqrestore(&moxa_lock, flags);
952
1da177e4
LT		 953 while (1) {
954 set_current_state(TASK_INTERRUPTIBLE);
955 if (tty_hung_up_p(filp) ||
956 !(ch->asyncflags & ASYNC_INITIALIZED)) {
957#ifdef SERIAL_DO_RESTART
958 if (ch->asyncflags & ASYNC_HUP_NOTIFY)
959 retval = -EAGAIN;
960 else
961 retval = -ERESTARTSYS;
962#else
963 retval = -EAGAIN;
964#endif
965 break;
966 }
967 if (!(ch->asyncflags & ASYNC_CLOSING) && (do_clocal ||
968 MoxaPortDCDON(ch->port)))
969 break;
970
971 if (signal_pending(current)) {
972 retval = -ERESTARTSYS;
973 break;
974 }
975 schedule();
976 }
977 set_current_state(TASK_RUNNING);
978 remove_wait_queue(&ch->open_wait, &wait);
33f0f88f
AC		 979
980 spin_lock_irqsave(&moxa_lock, flags);
1da177e4
LT		 981 if (!tty_hung_up_p(filp))
982 ch->count++;
983 ch->blocked_open--;
33f0f88f 984 spin_unlock_irqrestore(&moxa_lock, flags);
7aeb95da
JS		 985 pr_debug("block_til_ready after blocking: ttys%d, count = %d\n",
986 ch->port, ch->count);
1da177e4
LT		 987 if (retval)
988 return (retval);
33f0f88f 989 /* FIXME: review to see if we need to use set_bit on these */
1da177e4 990 ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
33f0f88f 991 return 0;
1da177e4
LT		 992}
993
6f56b658 994static void moxa_setup_empty_event(struct tty_struct *tty)
1da177e4 995{
8f8ecbad 996 struct moxa_port *ch = tty->driver_data;
1da177e4
LT		 997 unsigned long flags;
998
33f0f88f 999 spin_lock_irqsave(&moxa_lock, flags);
1da177e4 1000 ch->statusflags |= EMPTYWAIT;
8f8ecbad 1001 mod_timer(&moxa_ports[ch->port].emptyTimer, jiffies + HZ);
33f0f88f 1002 spin_unlock_irqrestore(&moxa_lock, flags);
1da177e4
LT		 1003}
1004
6f56b658 1005static void moxa_check_xmit_empty(unsigned long data)
1da177e4 1006{
8f8ecbad 1007 struct moxa_port *ch;
1da177e4 1008
8f8ecbad 1009 ch = (struct moxa_port *) data;
1da177e4
LT		 1010 if (ch->tty && (ch->statusflags & EMPTYWAIT)) {
1011 if (MoxaPortTxQueue(ch->port) == 0) {
1012 ch->statusflags &= ~EMPTYWAIT;
1013 tty_wakeup(ch->tty);
1014 return;
1015 }
c4342205
JS		 1016 mod_timer(&moxa_ports[ch->port].emptyTimer,
1017 round_jiffies(jiffies + HZ));
1da177e4
LT		 1018 } else
1019 ch->statusflags &= ~EMPTYWAIT;
1020}
1021
6f56b658 1022static void moxa_shut_down(struct moxa_port *ch)
1da177e4
LT		 1023{
1024 struct tty_struct *tp;
1025
1026 if (!(ch->asyncflags & ASYNC_INITIALIZED))
1027 return;
1028
1029 tp = ch->tty;
1030
1031 MoxaPortDisable(ch->port);
1032
1033 /*
1034 * If we're a modem control device and HUPCL is on, drop RTS & DTR.
1035 */
1036 if (tp->termios->c_cflag & HUPCL)
1037 MoxaPortLineCtrl(ch->port, 0, 0);
1038
1039 ch->asyncflags &= ~ASYNC_INITIALIZED;
1040}
1041
6f56b658 1042static void moxa_receive_data(struct moxa_port *ch)
1da177e4
LT		 1043{
1044 struct tty_struct *tp;
606d099c 1045 struct ktermios *ts;
1da177e4
LT		 1046 unsigned long flags;
1047
1048 ts = NULL;
1049 tp = ch->tty;
1050 if (tp)
1051 ts = tp->termios;
1052 /**************************************************
1053 if ( !tp || !ts || !(ts->c_cflag & CREAD) ) {
1054 *****************************************************/
1055 if (!tp || !ts) {
1056 MoxaPortFlushData(ch->port, 0);
1057 return;
1058 }
33f0f88f
AC		 1059 spin_lock_irqsave(&moxa_lock, flags);
1060 MoxaPortReadData(ch->port, tp);
1061 spin_unlock_irqrestore(&moxa_lock, flags);
1062 tty_schedule_flip(tp);
1da177e4
LT		 1063}
1064
1065#define Magic_code 0x404
1066
1067/*
1068 * System Configuration
1069 */
1070/*
1071 * for C218 BIOS initialization
1072 */
1073#define C218_ConfBase 0x800
1074#define C218_status (C218_ConfBase + 0) /* BIOS running status */
1075#define C218_diag (C218_ConfBase + 2) /* diagnostic status */
1076#define C218_key (C218_ConfBase + 4) /* WORD (0x218 for C218) */
1077#define C218DLoad_len (C218_ConfBase + 6) /* WORD */
1078#define C218check_sum (C218_ConfBase + 8) /* BYTE */
1079#define C218chksum_ok (C218_ConfBase + 0x0a) /* BYTE (1:ok) */
1080#define C218_TestRx (C218_ConfBase + 0x10) /* 8 bytes for 8 ports */
1081#define C218_TestTx (C218_ConfBase + 0x18) /* 8 bytes for 8 ports */
1082#define C218_RXerr (C218_ConfBase + 0x20) /* 8 bytes for 8 ports */
1083#define C218_ErrFlag (C218_ConfBase + 0x28) /* 8 bytes for 8 ports */
1084
1085#define C218_LoadBuf 0x0F00
1086#define C218_KeyCode 0x218
1087#define CP204J_KeyCode 0x204
1088
1089/*
1090 * for C320 BIOS initialization
1091 */
1092#define C320_ConfBase 0x800
1093#define C320_LoadBuf 0x0f00
1094#define STS_init 0x05 /* for C320_status */
1095
1096#define C320_status C320_ConfBase + 0 /* BIOS running status */
1097#define C320_diag C320_ConfBase + 2 /* diagnostic status */
1098#define C320_key C320_ConfBase + 4 /* WORD (0320H for C320) */
1099#define C320DLoad_len C320_ConfBase + 6 /* WORD */
1100#define C320check_sum C320_ConfBase + 8 /* WORD */
1101#define C320chksum_ok C320_ConfBase + 0x0a /* WORD (1:ok) */
1102#define C320bapi_len C320_ConfBase + 0x0c /* WORD */
1103#define C320UART_no C320_ConfBase + 0x0e /* WORD */
1104
1105#define C320_KeyCode 0x320
1106
1107#define FixPage_addr 0x0000 /* starting addr of static page */
1108#define DynPage_addr 0x2000 /* starting addr of dynamic page */
1109#define C218_start 0x3000 /* starting addr of C218 BIOS prg */
1110#define Control_reg 0x1ff0 /* select page and reset control */
1111#define HW_reset 0x80
1112
1113/*
1114 * Function Codes
1115 */
1116#define FC_CardReset 0x80
1117#define FC_ChannelReset 1 /* C320 firmware not supported */
1118#define FC_EnableCH 2
1119#define FC_DisableCH 3
1120#define FC_SetParam 4
1121#define FC_SetMode 5
1122#define FC_SetRate 6
1123#define FC_LineControl 7
1124#define FC_LineStatus 8
1125#define FC_XmitControl 9
1126#define FC_FlushQueue 10
1127#define FC_SendBreak 11
1128#define FC_StopBreak 12
1129#define FC_LoopbackON 13
1130#define FC_LoopbackOFF 14
1131#define FC_ClrIrqTable 15
1132#define FC_SendXon 16
1133#define FC_SetTermIrq 17 /* C320 firmware not supported */
1134#define FC_SetCntIrq 18 /* C320 firmware not supported */
1135#define FC_SetBreakIrq 19
1136#define FC_SetLineIrq 20
1137#define FC_SetFlowCtl 21
1138#define FC_GenIrq 22
1139#define FC_InCD180 23
1140#define FC_OutCD180 24
1141#define FC_InUARTreg 23
1142#define FC_OutUARTreg 24
1143#define FC_SetXonXoff 25
1144#define FC_OutCD180CCR 26
1145#define FC_ExtIQueue 27
1146#define FC_ExtOQueue 28
1147#define FC_ClrLineIrq 29
1148#define FC_HWFlowCtl 30
1149#define FC_GetClockRate 35
1150#define FC_SetBaud 36
1151#define FC_SetDataMode 41
1152#define FC_GetCCSR 43
1153#define FC_GetDataError 45
1154#define FC_RxControl 50
1155#define FC_ImmSend 51
1156#define FC_SetXonState 52
1157#define FC_SetXoffState 53
1158#define FC_SetRxFIFOTrig 54
1159#define FC_SetTxFIFOCnt 55
1160#define FC_UnixRate 56
1161#define FC_UnixResetTimer 57
1162
1163#define RxFIFOTrig1 0
1164#define RxFIFOTrig4 1
1165#define RxFIFOTrig8 2
1166#define RxFIFOTrig14 3
1167
1168/*
1169 * Dual-Ported RAM
1170 */
1171#define DRAM_global 0
1172#define INT_data (DRAM_global + 0)
1173#define Config_base (DRAM_global + 0x108)
1174
1175#define IRQindex (INT_data + 0)
1176#define IRQpending (INT_data + 4)
1177#define IRQtable (INT_data + 8)
1178
1179/*
1180 * Interrupt Status
1181 */
1182#define IntrRx 0x01 /* receiver data O.K. */
1183#define IntrTx 0x02 /* transmit buffer empty */
1184#define IntrFunc 0x04 /* function complete */
1185#define IntrBreak 0x08 /* received break */
1186#define IntrLine 0x10 /* line status change
1187 for transmitter */
1188#define IntrIntr 0x20 /* received INTR code */
1189#define IntrQuit 0x40 /* received QUIT code */
1190#define IntrEOF 0x80 /* received EOF code */
1191
1192#define IntrRxTrigger 0x100 /* rx data count reach tigger value */
1193#define IntrTxTrigger 0x200 /* tx data count below trigger value */
1194
1195#define Magic_no (Config_base + 0)
1196#define Card_model_no (Config_base + 2)
1197#define Total_ports (Config_base + 4)
1198#define Module_cnt (Config_base + 8)
1199#define Module_no (Config_base + 10)
1200#define Timer_10ms (Config_base + 14)
1201#define Disable_IRQ (Config_base + 20)
1202#define TMS320_PORT1 (Config_base + 22)
1203#define TMS320_PORT2 (Config_base + 24)
1204#define TMS320_CLOCK (Config_base + 26)
1205
1206/*
1207 * DATA BUFFER in DRAM
1208 */
1209#define Extern_table 0x400 /* Base address of the external table
1210 (24 words * 64) total 3K bytes
1211 (24 words * 128) total 6K bytes */
1212#define Extern_size 0x60 /* 96 bytes */
1213#define RXrptr 0x00 /* read pointer for RX buffer */
1214#define RXwptr 0x02 /* write pointer for RX buffer */
1215#define TXrptr 0x04 /* read pointer for TX buffer */
1216#define TXwptr 0x06 /* write pointer for TX buffer */
1217#define HostStat 0x08 /* IRQ flag and general flag */
1218#define FlagStat 0x0A
1219#define FlowControl 0x0C /* B7 B6 B5 B4 B3 B2 B1 B0 */
1220 /* x x x x | | | | */
1221 /* | | | + CTS flow */
1222 /* | | +--- RTS flow */
1223 /* | +------ TX Xon/Xoff */
1224 /* +--------- RX Xon/Xoff */
1225#define Break_cnt 0x0E /* received break count */
1226#define CD180TXirq 0x10 /* if non-0: enable TX irq */
1227#define RX_mask 0x12
1228#define TX_mask 0x14
1229#define Ofs_rxb 0x16
1230#define Ofs_txb 0x18
1231#define Page_rxb 0x1A
1232#define Page_txb 0x1C
1233#define EndPage_rxb 0x1E
1234#define EndPage_txb 0x20
1235#define Data_error 0x22
1236#define RxTrigger 0x28
1237#define TxTrigger 0x2a
1238
1239#define rRXwptr 0x34
1240#define Low_water 0x36
1241
1242#define FuncCode 0x40
1243#define FuncArg 0x42
1244#define FuncArg1 0x44
1245
1246#define C218rx_size 0x2000 /* 8K bytes */
1247#define C218tx_size 0x8000 /* 32K bytes */
1248
1249#define C218rx_mask (C218rx_size - 1)
1250#define C218tx_mask (C218tx_size - 1)
1251
1252#define C320p8rx_size 0x2000
1253#define C320p8tx_size 0x8000
1254#define C320p8rx_mask (C320p8rx_size - 1)
1255#define C320p8tx_mask (C320p8tx_size - 1)
1256
1257#define C320p16rx_size 0x2000
1258#define C320p16tx_size 0x4000
1259#define C320p16rx_mask (C320p16rx_size - 1)
1260#define C320p16tx_mask (C320p16tx_size - 1)
1261
1262#define C320p24rx_size 0x2000
1263#define C320p24tx_size 0x2000
1264#define C320p24rx_mask (C320p24rx_size - 1)
1265#define C320p24tx_mask (C320p24tx_size - 1)
1266
1267#define C320p32rx_size 0x1000
1268#define C320p32tx_size 0x1000
1269#define C320p32rx_mask (C320p32rx_size - 1)
1270#define C320p32tx_mask (C320p32tx_size - 1)
1271
1272#define Page_size 0x2000
1273#define Page_mask (Page_size - 1)
1274#define C218rx_spage 3
1275#define C218tx_spage 4
1276#define C218rx_pageno 1
1277#define C218tx_pageno 4
1278#define C218buf_pageno 5
1279
1280#define C320p8rx_spage 3
1281#define C320p8tx_spage 4
1282#define C320p8rx_pgno 1
1283#define C320p8tx_pgno 4
1284#define C320p8buf_pgno 5
1285
1286#define C320p16rx_spage 3
1287#define C320p16tx_spage 4
1288#define C320p16rx_pgno 1
1289#define C320p16tx_pgno 2
1290#define C320p16buf_pgno 3
1291
1292#define C320p24rx_spage 3
1293#define C320p24tx_spage 4
1294#define C320p24rx_pgno 1
1295#define C320p24tx_pgno 1
1296#define C320p24buf_pgno 2
1297
1298#define C320p32rx_spage 3
1299#define C320p32tx_ofs C320p32rx_size
1300#define C320p32tx_spage 3
1301#define C320p32buf_pgno 1
1302
1303/*
1304 * Host Status
1305 */
1306#define WakeupRx 0x01
1307#define WakeupTx 0x02
1308#define WakeupBreak 0x08
1309#define WakeupLine 0x10
1310#define WakeupIntr 0x20
1311#define WakeupQuit 0x40
1312#define WakeupEOF 0x80 /* used in VTIME control */
1313#define WakeupRxTrigger 0x100
1314#define WakeupTxTrigger 0x200
1315/*
1316 * Flag status
1317 */
1318#define Rx_over 0x01
1319#define Xoff_state 0x02
1320#define Tx_flowOff 0x04
1321#define Tx_enable 0x08
1322#define CTS_state 0x10
1323#define DSR_state 0x20
1324#define DCD_state 0x80
1325/*
1326 * FlowControl
1327 */
1328#define CTS_FlowCtl 1
1329#define RTS_FlowCtl 2
1330#define Tx_FlowCtl 4
1331#define Rx_FlowCtl 8
1332#define IXM_IXANY 0x10
1333
1334#define LowWater 128
1335
1336#define DTR_ON 1
1337#define RTS_ON 2
1338#define CTS_ON 1
1339#define DSR_ON 2
1340#define DCD_ON 8
1341
1342/* mode definition */
1343#define MX_CS8 0x03
1344#define MX_CS7 0x02
1345#define MX_CS6 0x01
1346#define MX_CS5 0x00
1347
1348#define MX_STOP1 0x00
1349#define MX_STOP15 0x04
1350#define MX_STOP2 0x08
1351
1352#define MX_PARNONE 0x00
1353#define MX_PAREVEN 0x40
1354#define MX_PARODD 0xC0
1355
1356/*
1357 * Query
1358 */
1da177e4
LT		 1359
1360struct mon_str {
1361 int tick;
1362 int rxcnt[MAX_PORTS];
1363 int txcnt[MAX_PORTS];
1364};
1da177e4
LT		 1365
1366#define DCD_changed 0x01
1367#define DCD_oldstate 0x80
1368
1369static unsigned char moxaBuff[10240];
1da177e4
LT		 1370static int moxaLowWaterChk;
1371static int moxaCard;
9dff89cd 1372static struct mon_str moxaLog;
9fa372a8 1373static int moxaFuncTout = HZ / 2;
1da177e4 1374
1da177e4 1375static void moxafunc(void __iomem *, int, ushort);
6f56b658
JS		 1376static void moxa_wait_finish(void __iomem *);
1377static void moxa_low_water_check(void __iomem *);
1da177e4
LT		 1378static int moxaloadbios(int, unsigned char __user *, int);
1379static int moxafindcard(int);
1380static int moxaload320b(int, unsigned char __user *, int);
1381static int moxaloadcode(int, unsigned char __user *, int);
1382static int moxaloadc218(int, void __iomem *, int);
1383static int moxaloadc320(int, void __iomem *, int, int *);
1384
1385/*****************************************************************************
1386 * Driver level functions: *
1387 * 1. MoxaDriverInit(void); *
1388 * 2. MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port); *
1389 * 3. MoxaDriverPoll(void); *
1390 *****************************************************************************/
1391void MoxaDriverInit(void)
1392{
8f8ecbad
JS		 1393 struct moxa_port *p;
1394 unsigned int i;
1da177e4
LT		 1395
1396 moxaFuncTout = HZ / 2; /* 500 mini-seconds */
1397 moxaCard = 0;
1398 moxaLog.tick = 0;
1399 moxaLowWaterChk = 0;
1400 for (i = 0; i < MAX_PORTS; i++) {
8f8ecbad
JS		 1401 p = &moxa_ports[i];
1402 p->chkPort = 0;
1403 p->lowChkFlag = 0;
1404 p->lineCtrl = 0;
1da177e4
LT		 1405 moxaLog.rxcnt[i] = 0;
1406 moxaLog.txcnt[i] = 0;
1407 }
1408}
1409
1410#define MOXA 0x400
1411#define MOXA_GET_IQUEUE (MOXA + 1) /* get input buffered count */
1412#define MOXA_GET_OQUEUE (MOXA + 2) /* get output buffered count */
1413#define MOXA_INIT_DRIVER (MOXA + 6) /* moxaCard=0 */
1414#define MOXA_LOAD_BIOS (MOXA + 9) /* download BIOS */
1415#define MOXA_FIND_BOARD (MOXA + 10) /* Check if MOXA card exist? */
1416#define MOXA_LOAD_C320B (MOXA + 11) /* download 320B firmware */
1417#define MOXA_LOAD_CODE (MOXA + 12) /* download firmware */
1418#define MOXA_GETDATACOUNT (MOXA + 23)
1419#define MOXA_GET_IOQUEUE (MOXA + 27)
1420#define MOXA_FLUSH_QUEUE (MOXA + 28)
1421#define MOXA_GET_CONF (MOXA + 35) /* configuration */
1422#define MOXA_GET_MAJOR (MOXA + 63)
1423#define MOXA_GET_CUMAJOR (MOXA + 64)
1424#define MOXA_GETMSTATUS (MOXA + 65)
1425
1da177e4
LT		 1426struct dl_str {
1427 char __user *buf;
1428 int len;
1429 int cardno;
1430};
1431
1da177e4
LT		 1432static struct dl_str dltmp;
1433
1434void MoxaPortFlushData(int port, int mode)
1435{
1436 void __iomem *ofsAddr;
1437 if ((mode < 0) || (mode > 2))
1438 return;
8f8ecbad 1439 ofsAddr = moxa_ports[port].tableAddr;
1da177e4
LT		 1440 moxafunc(ofsAddr, FC_FlushQueue, mode);
1441 if (mode != 1) {
8f8ecbad 1442 moxa_ports[port].lowChkFlag = 0;
6f56b658 1443 moxa_low_water_check(ofsAddr);
1da177e4
LT		 1444 }
1445}
1446
1447int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port)
1448{
1449 int i;
1450 int status;
1451 int MoxaPortTxQueue(int), MoxaPortRxQueue(int);
1452 void __user *argp = (void __user *)arg;
1453
11324edd 1454 if (port == MAX_PORTS) {
1da177e4
LT		 1455 if ((cmd != MOXA_GET_CONF) && (cmd != MOXA_INIT_DRIVER) &&
1456 (cmd != MOXA_LOAD_BIOS) && (cmd != MOXA_FIND_BOARD) && (cmd != MOXA_LOAD_C320B) &&
1457 (cmd != MOXA_LOAD_CODE) && (cmd != MOXA_GETDATACOUNT) &&
1458 (cmd != MOXA_GET_IOQUEUE) && (cmd != MOXA_GET_MAJOR) &&
1459 (cmd != MOXA_GET_CUMAJOR) && (cmd != MOXA_GETMSTATUS))
1460 return (-EINVAL);
1461 }
1462 switch (cmd) {
1463 case MOXA_GET_CONF:
9dff89cd
JS		 1464 if(copy_to_user(argp, &moxa_boards, MAX_BOARDS *
1465 sizeof(struct moxa_board_conf)))
1da177e4
LT		 1466 return -EFAULT;
1467 return (0);
1468 case MOXA_INIT_DRIVER:
1469 if ((int) arg == 0x404)
1470 MoxaDriverInit();
1471 return (0);
1472 case MOXA_GETDATACOUNT:
1473 moxaLog.tick = jiffies;
9dff89cd 1474 if(copy_to_user(argp, &moxaLog, sizeof(struct mon_str)))
1da177e4
LT		 1475 return -EFAULT;
1476 return (0);
1477 case MOXA_FLUSH_QUEUE:
1478 MoxaPortFlushData(port, arg);
1479 return (0);
8f8ecbad
JS		 1480 case MOXA_GET_IOQUEUE: {
1481 struct moxaq_str __user *argm = argp;
181d6f4f 1482 struct moxaq_str tmp;
8f8ecbad
JS		 1483
1484 for (i = 0; i < MAX_PORTS; i++, argm++) {
181d6f4f
JS		 1485 memset(&tmp, 0, sizeof(tmp));
1486 if (moxa_ports[i].chkPort) {
1487 tmp.inq = MoxaPortRxQueue(i);
1488 tmp.outq = MoxaPortTxQueue(i);
1da177e4 1489 }
181d6f4f 1490 if (copy_to_user(argm, &tmp, sizeof(tmp)))
8f8ecbad 1491 return -EFAULT;
1da177e4 1492 }
1da177e4 1493 return (0);
8f8ecbad 1494 } case MOXA_GET_OQUEUE:
1da177e4
LT		 1495 i = MoxaPortTxQueue(port);
1496 return put_user(i, (unsigned long __user *)argp);
1497 case MOXA_GET_IQUEUE:
1498 i = MoxaPortRxQueue(port);
1499 return put_user(i, (unsigned long __user *)argp);
1500 case MOXA_GET_MAJOR:
1501 if(copy_to_user(argp, &ttymajor, sizeof(int)))
1502 return -EFAULT;
1503 return 0;
1504 case MOXA_GET_CUMAJOR:
1505 i = 0;
1506 if(copy_to_user(argp, &i, sizeof(int)))
1507 return -EFAULT;
1508 return 0;
8f8ecbad
JS		 1509 case MOXA_GETMSTATUS: {
1510 struct mxser_mstatus __user *argm = argp;
181d6f4f 1511 struct mxser_mstatus tmp;
8f8ecbad
JS		 1512 struct moxa_port *p;
1513
1514 for (i = 0; i < MAX_PORTS; i++, argm++) {
1515 p = &moxa_ports[i];
181d6f4f 1516 memset(&tmp, 0, sizeof(tmp));
8f8ecbad
JS		 1517 if (!p->chkPort) {
1518 goto copy;
1da177e4 1519 } else {
8f8ecbad 1520 status = MoxaPortLineStatus(p->port);
1da177e4 1521 if (status & 1)
181d6f4f 1522 tmp.cts = 1;
1da177e4 1523 if (status & 2)
181d6f4f 1524 tmp.dsr = 1;
1da177e4 1525 if (status & 4)
181d6f4f 1526 tmp.dcd = 1;
1da177e4
LT		 1527 }
1528
8f8ecbad 1529 if (!p->tty || !p->tty->termios)
181d6f4f 1530 tmp.cflag = p->cflag;
1da177e4 1531 else
181d6f4f 1532 tmp.cflag = p->tty->termios->c_cflag;
8f8ecbad 1533copy:
181d6f4f 1534 if (copy_to_user(argm, &tmp, sizeof(tmp)))
8f8ecbad 1535 return -EFAULT;
1da177e4 1536 }
1da177e4 1537 return 0;
8f8ecbad 1538 } default:
1da177e4
LT		 1539 return (-ENOIOCTLCMD);
1540 case MOXA_LOAD_BIOS:
1541 case MOXA_FIND_BOARD:
1542 case MOXA_LOAD_C320B:
1543 case MOXA_LOAD_CODE:
49cd619c
AC		 1544 if (!capable(CAP_SYS_RAWIO))
1545 return -EPERM;
1da177e4
LT		 1546 break;
1547 }
1548
1549 if(copy_from_user(&dltmp, argp, sizeof(struct dl_str)))
1550 return -EFAULT;
a2f72982 1551 if(dltmp.cardno < 0 || dltmp.cardno >= MAX_BOARDS || dltmp.len < 0)
1da177e4
LT		 1552 return -EINVAL;
1553
1554 switch(cmd)
1555 {
1556 case MOXA_LOAD_BIOS:
1557 i = moxaloadbios(dltmp.cardno, dltmp.buf, dltmp.len);
1558 return (i);
1559 case MOXA_FIND_BOARD:
1560 return moxafindcard(dltmp.cardno);
1561 case MOXA_LOAD_C320B:
1562 moxaload320b(dltmp.cardno, dltmp.buf, dltmp.len);
1563 default: /* to keep gcc happy */
1564 return (0);
1565 case MOXA_LOAD_CODE:
1566 i = moxaloadcode(dltmp.cardno, dltmp.buf, dltmp.len);
1567 if (i == -1)
1568 return (-EFAULT);
1569 return (i);
1570
1571 }
1572}
1573
1574int MoxaDriverPoll(void)
1575{
8f8ecbad 1576 struct moxa_board_conf *brd;
1da177e4
LT		 1577 register ushort temp;
1578 register int card;
1579 void __iomem *ofsAddr;
1580 void __iomem *ip;
1581 int port, p, ports;
1582
1583 if (moxaCard == 0)
1584 return (-1);
1585 for (card = 0; card < MAX_BOARDS; card++) {
8f8ecbad
JS		 1586 brd = &moxa_boards[card];
1587 if (brd->loadstat == 0)
01cfaf0d 1588 continue;
8f8ecbad 1589 if ((ports = brd->numPorts) == 0)
1da177e4 1590 continue;
8f8ecbad
JS		 1591 if (readb(brd->intPend) == 0xff) {
1592 ip = brd->intTable + readb(brd->intNdx);
1da177e4
LT		 1593 p = card * MAX_PORTS_PER_BOARD;
1594 ports <<= 1;
1595 for (port = 0; port < ports; port += 2, p++) {
1596 if ((temp = readw(ip + port)) != 0) {
1597 writew(0, ip + port);
8f8ecbad 1598 ofsAddr = moxa_ports[p].tableAddr;
1da177e4
LT		 1599 if (temp & IntrTx)
1600 writew(readw(ofsAddr + HostStat) & ~WakeupTx, ofsAddr + HostStat);
1601 if (temp & IntrBreak) {
8f8ecbad 1602 moxa_ports[p].breakCnt++;
1da177e4
LT		 1603 }
1604 if (temp & IntrLine) {
1605 if (readb(ofsAddr + FlagStat) & DCD_state) {
8f8ecbad
JS		 1606 if ((moxa_ports[p].DCDState & DCD_oldstate) == 0)
1607 moxa_ports[p].DCDState = (DCD_oldstate |
1da177e4
LT		 1608 DCD_changed);
1609 } else {
8f8ecbad
JS		 1610 if (moxa_ports[p].DCDState & DCD_oldstate)
1611 moxa_ports[p].DCDState = DCD_changed;
1da177e4
LT		 1612 }
1613 }
1614 }
1615 }
8f8ecbad 1616 writeb(0, brd->intPend);
1da177e4
LT		 1617 }
1618 if (moxaLowWaterChk) {
1619 p = card * MAX_PORTS_PER_BOARD;
1620 for (port = 0; port < ports; port++, p++) {
8f8ecbad
JS		 1621 if (moxa_ports[p].lowChkFlag) {
1622 moxa_ports[p].lowChkFlag = 0;
1623 ofsAddr = moxa_ports[p].tableAddr;
6f56b658 1624 moxa_low_water_check(ofsAddr);
1da177e4
LT		 1625 }
1626 }
1627 }
1628 }
1629 moxaLowWaterChk = 0;
1630 return (0);
1631}
1632
1633/*****************************************************************************
1634 * Card level function: *
1635 * 1. MoxaPortsOfCard(int cardno); *
1636 *****************************************************************************/
1637int MoxaPortsOfCard(int cardno)
1638{
1639
1640 if (moxa_boards[cardno].boardType == 0)
1641 return (0);
1642 return (moxa_boards[cardno].numPorts);
1643}
1644
1645/*****************************************************************************
1646 * Port level functions: *
1647 * 1. MoxaPortIsValid(int port); *
1648 * 2. MoxaPortEnable(int port); *
1649 * 3. MoxaPortDisable(int port); *
1650 * 4. MoxaPortGetMaxBaud(int port); *
1da177e4 1651 * 6. MoxaPortSetBaud(int port, long baud); *
1da177e4
LT		 1652 * 8. MoxaPortSetTermio(int port, unsigned char *termio); *
1653 * 9. MoxaPortGetLineOut(int port, int *dtrState, int *rtsState); *
1654 * 10. MoxaPortLineCtrl(int port, int dtrState, int rtsState); *
1655 * 11. MoxaPortFlowCtrl(int port, int rts, int cts, int rx, int tx,int xany); *
1656 * 12. MoxaPortLineStatus(int port); *
1657 * 13. MoxaPortDCDChange(int port); *
1658 * 14. MoxaPortDCDON(int port); *
1659 * 15. MoxaPortFlushData(int port, int mode); *
1660 * 16. MoxaPortWriteData(int port, unsigned char * buffer, int length); *
33f0f88f 1661 * 17. MoxaPortReadData(int port, struct tty_struct *tty); *
1da177e4
LT		 1662 * 20. MoxaPortTxQueue(int port); *
1663 * 21. MoxaPortTxFree(int port); *
1664 * 22. MoxaPortRxQueue(int port); *
1da177e4
LT		 1665 * 24. MoxaPortTxDisable(int port); *
1666 * 25. MoxaPortTxEnable(int port); *
1da177e4 1667 * 27. MoxaPortResetBrkCnt(int port); *
1da177e4
LT		 1668 * 30. MoxaPortSendBreak(int port, int ticks); *
1669 *****************************************************************************/
1670/*
1671 * Moxa Port Number Description:
1672 *
1673 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1674 * the port number using in MOXA driver functions will be 0 to 31 for
1675 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1676 * to 127 for fourth. For example, if you setup three MOXA boards,
1677 * first board is C218, second board is C320-16 and third board is
1678 * C320-32. The port number of first board (C218 - 8 ports) is from
1679 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1680 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1681 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1682 * 127 will be invalid.
1683 *
1684 *
1685 * Moxa Functions Description:
1686 *
1687 * Function 1: Driver initialization routine, this routine must be
1688 * called when initialized driver.
1689 * Syntax:
1690 * void MoxaDriverInit();
1691 *
1692 *
1693 * Function 2: Moxa driver private IOCTL command processing.
1694 * Syntax:
1695 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1696 *
1697 * unsigned int cmd : IOCTL command
1698 * unsigned long arg : IOCTL argument
1699 * int port : port number (0 - 127)
1700 *
1701 * return: 0 (OK)
1702 * -EINVAL
1703 * -ENOIOCTLCMD
1704 *
1705 *
1706 * Function 3: Moxa driver polling process routine.
1707 * Syntax:
1708 * int MoxaDriverPoll(void);
1709 *
1710 * return: 0 ; polling O.K.
1711 * -1 : no any Moxa card.
1712 *
1713 *
1714 * Function 4: Get the ports of this card.
1715 * Syntax:
1716 * int MoxaPortsOfCard(int cardno);
1717 *
1718 * int cardno : card number (0 - 3)
1719 *
1720 * return: 0 : this card is invalid
1721 * 8/16/24/32
1722 *
1723 *
1724 * Function 5: Check this port is valid or invalid
1725 * Syntax:
1726 * int MoxaPortIsValid(int port);
1727 * int port : port number (0 - 127, ref port description)
1728 *
1729 * return: 0 : this port is invalid
1730 * 1 : this port is valid
1731 *
1732 *
1733 * Function 6: Enable this port to start Tx/Rx data.
1734 * Syntax:
1735 * void MoxaPortEnable(int port);
1736 * int port : port number (0 - 127)
1737 *
1738 *
1739 * Function 7: Disable this port
1740 * Syntax:
1741 * void MoxaPortDisable(int port);
1742 * int port : port number (0 - 127)
1743 *
1744 *
1745 * Function 8: Get the maximun available baud rate of this port.
1746 * Syntax:
1747 * long MoxaPortGetMaxBaud(int port);
1748 * int port : port number (0 - 127)
1749 *
1750 * return: 0 : this port is invalid
1751 * 38400/57600/115200 bps
1752 *
1753 *
1da177e4
LT		 1754 * Function 10: Setting baud rate of this port.
1755 * Syntax:
1756 * long MoxaPortSetBaud(int port, long baud);
1757 * int port : port number (0 - 127)
1758 * long baud : baud rate (50 - 115200)
1759 *
1760 * return: 0 : this port is invalid or baud < 50
1761 * 50 - 115200 : the real baud rate set to the port, if
1762 * the argument baud is large than maximun
1763 * available baud rate, the real setting
1764 * baud rate will be the maximun baud rate.
1765 *
1766 *
1da177e4
LT		 1767 * Function 12: Configure the port.
1768 * Syntax:
606d099c 1769 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1da177e4 1770 * int port : port number (0 - 127)
606d099c 1771 * struct ktermios * termio : termio structure pointer
c7bce309 1772 * speed_t baud : baud rate
1da177e4
LT		 1773 *
1774 * return: -1 : this port is invalid or termio == NULL
1775 * 0 : setting O.K.
1776 *
1777 *
1778 * Function 13: Get the DTR/RTS state of this port.
1779 * Syntax:
1780 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1781 * int port : port number (0 - 127)
1782 * int * dtrState : pointer to INT to receive the current DTR
1783 * state. (if NULL, this function will not
1784 * write to this address)
1785 * int * rtsState : pointer to INT to receive the current RTS
1786 * state. (if NULL, this function will not
1787 * write to this address)
1788 *
1789 * return: -1 : this port is invalid
1790 * 0 : O.K.
1791 *
1792 *
1793 * Function 14: Setting the DTR/RTS output state of this port.
1794 * Syntax:
1795 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1796 * int port : port number (0 - 127)
1797 * int dtrState : DTR output state (0: off, 1: on)
1798 * int rtsState : RTS output state (0: off, 1: on)
1799 *
1800 *
1801 * Function 15: Setting the flow control of this port.
1802 * Syntax:
1803 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1804 * int txFlow,int xany);
1805 * int port : port number (0 - 127)
1806 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1807 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1808 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1809 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1810 * int xany : S/W XANY flow control (0: no, 1: yes)
1811 *
1812 *
1813 * Function 16: Get ths line status of this port
1814 * Syntax:
1815 * int MoxaPortLineStatus(int port);
1816 * int port : port number (0 - 127)
1817 *
1818 * return: Bit 0 - CTS state (0: off, 1: on)
1819 * Bit 1 - DSR state (0: off, 1: on)
1820 * Bit 2 - DCD state (0: off, 1: on)
1821 *
1822 *
1823 * Function 17: Check the DCD state has changed since the last read
1824 * of this function.
1825 * Syntax:
1826 * int MoxaPortDCDChange(int port);
1827 * int port : port number (0 - 127)
1828 *
1829 * return: 0 : no changed
1830 * 1 : DCD has changed
1831 *
1832 *
1833 * Function 18: Check ths current DCD state is ON or not.
1834 * Syntax:
1835 * int MoxaPortDCDON(int port);
1836 * int port : port number (0 - 127)
1837 *
1838 * return: 0 : DCD off
1839 * 1 : DCD on
1840 *
1841 *
1842 * Function 19: Flush the Rx/Tx buffer data of this port.
1843 * Syntax:
1844 * void MoxaPortFlushData(int port, int mode);
1845 * int port : port number (0 - 127)
1846 * int mode
1847 * 0 : flush the Rx buffer
1848 * 1 : flush the Tx buffer
1849 * 2 : flush the Rx and Tx buffer
1850 *
1851 *
1852 * Function 20: Write data.
1853 * Syntax:
1854 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1855 * int port : port number (0 - 127)
1856 * unsigned char * buffer : pointer to write data buffer.
1857 * int length : write data length
1858 *
1859 * return: 0 - length : real write data length
1860 *
1861 *
1862 * Function 21: Read data.
1863 * Syntax:
33f0f88f 1864 * int MoxaPortReadData(int port, struct tty_struct *tty);
1da177e4 1865 * int port : port number (0 - 127)
33f0f88f 1866 * struct tty_struct *tty : tty for data
1da177e4
LT		 1867 *
1868 * return: 0 - length : real read data length
1869 *
1870 *
1da177e4
LT		 1871 * Function 24: Get the Tx buffer current queued data bytes
1872 * Syntax:
1873 * int MoxaPortTxQueue(int port);
1874 * int port : port number (0 - 127)
1875 *
1876 * return: .. : Tx buffer current queued data bytes
1877 *
1878 *
1879 * Function 25: Get the Tx buffer current free space
1880 * Syntax:
1881 * int MoxaPortTxFree(int port);
1882 * int port : port number (0 - 127)
1883 *
1884 * return: .. : Tx buffer current free space
1885 *
1886 *
1887 * Function 26: Get the Rx buffer current queued data bytes
1888 * Syntax:
1889 * int MoxaPortRxQueue(int port);
1890 * int port : port number (0 - 127)
1891 *
1892 * return: .. : Rx buffer current queued data bytes
1893 *
1894 *
1da177e4
LT		 1895 * Function 28: Disable port data transmission.
1896 * Syntax:
1897 * void MoxaPortTxDisable(int port);
1898 * int port : port number (0 - 127)
1899 *
1900 *
1901 * Function 29: Enable port data transmission.
1902 * Syntax:
1903 * void MoxaPortTxEnable(int port);
1904 * int port : port number (0 - 127)
1905 *
1906 *
1da177e4
LT		 1907 * Function 31: Get the received BREAK signal count and reset it.
1908 * Syntax:
1909 * int MoxaPortResetBrkCnt(int port);
1910 * int port : port number (0 - 127)
1911 *
1912 * return: 0 - .. : BREAK signal count
1913 *
1914 *
1da177e4
LT		 1915 * Function 34: Send out a BREAK signal.
1916 * Syntax:
1917 * void MoxaPortSendBreak(int port, int ms100);
1918 * int port : port number (0 - 127)
1919 * int ms100 : break signal time interval.
1920 * unit: 100 mini-second. if ms100 == 0, it will
1921 * send out a about 250 ms BREAK signal.
1922 *
1923 */
1924int MoxaPortIsValid(int port)
1925{
1926
1927 if (moxaCard == 0)
1928 return (0);
8f8ecbad 1929 if (moxa_ports[port].chkPort == 0)
1da177e4
LT		 1930 return (0);
1931 return (1);
1932}
1933
1934void MoxaPortEnable(int port)
1935{
1936 void __iomem *ofsAddr;
1937 int MoxaPortLineStatus(int);
1938 short lowwater = 512;
1939
8f8ecbad 1940 ofsAddr = moxa_ports[port].tableAddr;
1da177e4 1941 writew(lowwater, ofsAddr + Low_water);
8f8ecbad 1942 moxa_ports[port].breakCnt = 0;
1da177e4
LT		 1943 if ((moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_ISA) ||
1944 (moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_PCI)) {
1945 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
1946 } else {
1947 writew(readw(ofsAddr + HostStat) | WakeupBreak, ofsAddr + HostStat);
1948 }
1949
1950 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
1951 moxafunc(ofsAddr, FC_FlushQueue, 2);
1952
1953 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
1954 MoxaPortLineStatus(port);
1955}
1956
1957void MoxaPortDisable(int port)
1958{
8f8ecbad 1959 void __iomem *ofsAddr = moxa_ports[port].tableAddr;
1da177e4
LT		 1960
1961 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
1962 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
1963 writew(0, ofsAddr + HostStat);
1964 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
1965}
1966
1967long MoxaPortGetMaxBaud(int port)
1968{
1969 if ((moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_ISA) ||
1970 (moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_PCI))
1971 return (460800L);
1972 else
1973 return (921600L);
1974}
1975
1976
1977long MoxaPortSetBaud(int port, long baud)
1978{
1979 void __iomem *ofsAddr;
1980 long max, clock;
1981 unsigned int val;
1982
1983 if ((baud < 50L) || ((max = MoxaPortGetMaxBaud(port)) == 0))
1984 return (0);
8f8ecbad 1985 ofsAddr = moxa_ports[port].tableAddr;
1da177e4
LT		 1986 if (baud > max)
1987 baud = max;
1988 if (max == 38400L)
1989 clock = 614400L; /* for 9.8304 Mhz : max. 38400 bps */
1990 else if (max == 57600L)
1991 clock = 691200L; /* for 11.0592 Mhz : max. 57600 bps */
1992 else
1993 clock = 921600L; /* for 14.7456 Mhz : max. 115200 bps */
1994 val = clock / baud;
1995 moxafunc(ofsAddr, FC_SetBaud, val);
1996 baud = clock / val;
8f8ecbad 1997 moxa_ports[port].curBaud = baud;
1da177e4
LT		 1998 return (baud);
1999}
2000
606d099c 2001int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud)
1da177e4
LT		 2002{
2003 void __iomem *ofsAddr;
2004 tcflag_t cflag;
1da177e4
LT		 2005 tcflag_t mode = 0;
2006
8f8ecbad 2007 if (moxa_ports[port].chkPort == 0 || termio == 0)
1da177e4 2008 return (-1);
8f8ecbad 2009 ofsAddr = moxa_ports[port].tableAddr;
1da177e4
LT		 2010 cflag = termio->c_cflag; /* termio->c_cflag */
2011
2012 mode = termio->c_cflag & CSIZE;
2013 if (mode == CS5)
2014 mode = MX_CS5;
2015 else if (mode == CS6)
2016 mode = MX_CS6;
2017 else if (mode == CS7)
2018 mode = MX_CS7;
2019 else if (mode == CS8)
2020 mode = MX_CS8;
2021
2022 if (termio->c_cflag & CSTOPB) {
2023 if (mode == MX_CS5)
2024 mode |= MX_STOP15;
2025 else
2026 mode |= MX_STOP2;
2027 } else
2028 mode |= MX_STOP1;
2029
2030 if (termio->c_cflag & PARENB) {
2031 if (termio->c_cflag & PARODD)
2032 mode |= MX_PARODD;
2033 else
2034 mode |= MX_PAREVEN;
2035 } else
2036 mode |= MX_PARNONE;
2037
2038 moxafunc(ofsAddr, FC_SetDataMode, (ushort) mode);
2039
1da177e4
LT		 2040 if ((moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_ISA) ||
2041 (moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_PCI)) {
c7bce309 2042 if (baud >= 921600L)
1da177e4
LT		 2043 return (-1);
2044 }
db1acaa6 2045 baud = MoxaPortSetBaud(port, baud);
1da177e4
LT		 2046
2047 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
2048 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
2049 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
2050 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
6f56b658 2051 moxa_wait_finish(ofsAddr);
1da177e4
LT		 2052
2053 }
db1acaa6 2054 return (baud);
1da177e4
LT		 2055}
2056
2057int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState)
2058{
2059
2060 if (!MoxaPortIsValid(port))
2061 return (-1);
2062 if (dtrState) {
8f8ecbad 2063 if (moxa_ports[port].lineCtrl & DTR_ON)
1da177e4
LT		 2064 *dtrState = 1;
2065 else
2066 *dtrState = 0;
2067 }
2068 if (rtsState) {
8f8ecbad 2069 if (moxa_ports[port].lineCtrl & RTS_ON)
1da177e4
LT		 2070 *rtsState = 1;
2071 else
2072 *rtsState = 0;
2073 }
2074 return (0);
2075}
2076
2077void MoxaPortLineCtrl(int port, int dtr, int rts)
2078{
2079 void __iomem *ofsAddr;
2080 int mode;
2081
8f8ecbad 2082 ofsAddr = moxa_ports[port].tableAddr;
1da177e4
LT		 2083 mode = 0;
2084 if (dtr)
2085 mode |= DTR_ON;
2086 if (rts)
2087 mode |= RTS_ON;
8f8ecbad 2088 moxa_ports[port].lineCtrl = mode;
1da177e4
LT		 2089 moxafunc(ofsAddr, FC_LineControl, mode);
2090}
2091
2092void MoxaPortFlowCtrl(int port, int rts, int cts, int txflow, int rxflow, int txany)
2093{
2094 void __iomem *ofsAddr;
2095 int mode;
2096
8f8ecbad 2097 ofsAddr = moxa_ports[port].tableAddr;
1da177e4
LT		 2098 mode = 0;
2099 if (rts)
2100 mode |= RTS_FlowCtl;
2101 if (cts)
2102 mode |= CTS_FlowCtl;
2103 if (txflow)
2104 mode |= Tx_FlowCtl;
2105 if (rxflow)
2106 mode |= Rx_FlowCtl;
2107 if (txany)
2108 mode |= IXM_IXANY;
2109 moxafunc(ofsAddr, FC_SetFlowCtl, mode);
2110}
2111
2112int MoxaPortLineStatus(int port)
2113{
2114 void __iomem *ofsAddr;
2115 int val;
2116
8f8ecbad 2117 ofsAddr = moxa_ports[port].tableAddr;
1da177e4
LT		 2118 if ((moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_ISA) ||
2119 (moxa_boards[port / MAX_PORTS_PER_BOARD].boardType == MOXA_BOARD_C320_PCI)) {
2120 moxafunc(ofsAddr, FC_LineStatus, 0);
2121 val = readw(ofsAddr + FuncArg);
2122 } else {
2123 val = readw(ofsAddr + FlagStat) >> 4;
2124 }
2125 val &= 0x0B;
2126 if (val & 8) {
2127 val |= 4;
8f8ecbad
JS		 2128 if ((moxa_ports[port].DCDState & DCD_oldstate) == 0)
2129 moxa_ports[port].DCDState = (DCD_oldstate | DCD_changed);
1da177e4 2130 } else {
8f8ecbad
JS		 2131 if (moxa_ports[port].DCDState & DCD_oldstate)
2132 moxa_ports[port].DCDState = DCD_changed;
1da177e4
LT		 2133 }
2134 val &= 7;
2135 return (val);
2136}
2137
2138int MoxaPortDCDChange(int port)
2139{
2140 int n;
2141
8f8ecbad 2142 if (moxa_ports[port].chkPort == 0)
1da177e4 2143 return (0);
8f8ecbad
JS		 2144 n = moxa_ports[port].DCDState;
2145 moxa_ports[port].DCDState &= ~DCD_changed;
1da177e4
LT		 2146 n &= DCD_changed;
2147 return (n);
2148}
2149
2150int MoxaPortDCDON(int port)
2151{
2152 int n;
2153
8f8ecbad 2154 if (moxa_ports[port].chkPort == 0)
1da177e4 2155 return (0);
8f8ecbad 2156 if (moxa_ports[port].DCDState & DCD_oldstate)
1da177e4
LT		 2157 n = 1;
2158 else
2159 n = 0;
2160 return (n);
2161}
2162
1da177e4
LT		 2163int MoxaPortWriteData(int port, unsigned char * buffer, int len)
2164{
2165 int c, total, i;
2166 ushort tail;
2167 int cnt;
2168 ushort head, tx_mask, spage, epage;
2169 ushort pageno, pageofs, bufhead;
2170 void __iomem *baseAddr, *ofsAddr, *ofs;
2171
8f8ecbad
JS		 2172 ofsAddr = moxa_ports[port].tableAddr;
2173 baseAddr = moxa_boards[port / MAX_PORTS_PER_BOARD].basemem;
1da177e4
LT		 2174 tx_mask = readw(ofsAddr + TX_mask);
2175 spage = readw(ofsAddr + Page_txb);
2176 epage = readw(ofsAddr + EndPage_txb);
2177 tail = readw(ofsAddr + TXwptr);
2178 head = readw(ofsAddr + TXrptr);
2179 c = (head > tail) ? (head - tail - 1)
2180 : (head - tail + tx_mask);
2181 if (c > len)
2182 c = len;
2183 moxaLog.txcnt[port] += c;
2184 total = c;
2185 if (spage == epage) {
2186 bufhead = readw(ofsAddr + Ofs_txb);
2187 writew(spage, baseAddr + Control_reg);
2188 while (c > 0) {
2189 if (head > tail)
2190 len = head - tail - 1;
2191 else
2192 len = tx_mask + 1 - tail;
2193 len = (c > len) ? len : c;
2194 ofs = baseAddr + DynPage_addr + bufhead + tail;
2195 for (i = 0; i < len; i++)
2196 writeb(*buffer++, ofs + i);
2197 tail = (tail + len) & tx_mask;
2198 c -= len;
2199 }
2200 writew(tail, ofsAddr + TXwptr);
2201 } else {
2202 len = c;
2203 pageno = spage + (tail >> 13);
2204 pageofs = tail & Page_mask;
2205 do {
2206 cnt = Page_size - pageofs;
2207 if (cnt > c)
2208 cnt = c;
2209 c -= cnt;
2210 writeb(pageno, baseAddr + Control_reg);
2211 ofs = baseAddr + DynPage_addr + pageofs;
2212 for (i = 0; i < cnt; i++)
2213 writeb(*buffer++, ofs + i);
2214 if (c == 0) {
2215 writew((tail + len) & tx_mask, ofsAddr + TXwptr);
2216 break;
2217 }
2218 if (++pageno == epage)
2219 pageno = spage;
2220 pageofs = 0;
2221 } while (1);
2222 }
2223 writeb(1, ofsAddr + CD180TXirq); /* start to send */
2224 return (total);
2225}
2226
33f0f88f 2227int MoxaPortReadData(int port, struct tty_struct *tty)
1da177e4
LT		 2228{
2229 register ushort head, pageofs;
2230 int i, count, cnt, len, total, remain;
2231 ushort tail, rx_mask, spage, epage;
2232 ushort pageno, bufhead;
2233 void __iomem *baseAddr, *ofsAddr, *ofs;
2234
8f8ecbad
JS		 2235 ofsAddr = moxa_ports[port].tableAddr;
2236 baseAddr = moxa_boards[port / MAX_PORTS_PER_BOARD].basemem;
1da177e4
LT		 2237 head = readw(ofsAddr + RXrptr);
2238 tail = readw(ofsAddr + RXwptr);
2239 rx_mask = readw(ofsAddr + RX_mask);
2240 spage = readw(ofsAddr + Page_rxb);
2241 epage = readw(ofsAddr + EndPage_rxb);
2242 count = (tail >= head) ? (tail - head)
2243 : (tail - head + rx_mask + 1);
2244 if (count == 0)
33f0f88f 2245 return 0;
1da177e4 2246
33f0f88f 2247 total = count;
1da177e4
LT		 2248 remain = count - total;
2249 moxaLog.rxcnt[port] += total;
2250 count = total;
2251 if (spage == epage) {
2252 bufhead = readw(ofsAddr + Ofs_rxb);
2253 writew(spage, baseAddr + Control_reg);
2254 while (count > 0) {
2255 if (tail >= head)
2256 len = tail - head;
2257 else
2258 len = rx_mask + 1 - head;
2259 len = (count > len) ? len : count;
2260 ofs = baseAddr + DynPage_addr + bufhead + head;
2261 for (i = 0; i < len; i++)
33f0f88f 2262 tty_insert_flip_char(tty, readb(ofs + i), TTY_NORMAL);
1da177e4
LT		 2263 head = (head + len) & rx_mask;
2264 count -= len;
2265 }
2266 writew(head, ofsAddr + RXrptr);
2267 } else {
2268 len = count;
2269 pageno = spage + (head >> 13);
2270 pageofs = head & Page_mask;
2271 do {
2272 cnt = Page_size - pageofs;
2273 if (cnt > count)
2274 cnt = count;
2275 count -= cnt;
2276 writew(pageno, baseAddr + Control_reg);
2277 ofs = baseAddr + DynPage_addr + pageofs;
2278 for (i = 0; i < cnt; i++)
33f0f88f 2279 tty_insert_flip_char(tty, readb(ofs + i), TTY_NORMAL);
1da177e4
LT		 2280 if (count == 0) {
2281 writew((head + len) & rx_mask, ofsAddr + RXrptr);
2282 break;
2283 }
2284 if (++pageno == epage)
2285 pageno = spage;
2286 pageofs = 0;
2287 } while (1);
2288 }
2289 if ((readb(ofsAddr + FlagStat) & Xoff_state) && (remain < LowWater)) {
2290 moxaLowWaterChk = 1;
8f8ecbad 2291 moxa_ports[port].lowChkFlag = 1;
1da177e4
LT		 2292 }
2293 return (total);
2294}
2295
2296
2297int MoxaPortTxQueue(int port)
2298{
2299 void __iomem *ofsAddr;
2300 ushort rptr, wptr, mask;
2301 int len;
2302
8f8ecbad 2303 ofsAddr = moxa_ports[port].tableAddr;
1da177e4
LT		 2304 rptr = readw(ofsAddr + TXrptr);
2305 wptr = readw(ofsAddr + TXwptr);
2306 mask = readw(ofsAddr + TX_mask);
2307 len = (wptr - rptr) & mask;
2308 return (len);
2309}
2310
2311int MoxaPortTxFree(int port)
2312{
2313 void __iomem *ofsAddr;
2314 ushort rptr, wptr, mask;
2315 int len;
2316
8f8ecbad 2317 ofsAddr = moxa_ports[port].tableAddr;
1da177e4
LT		 2318 rptr = readw(ofsAddr + TXrptr);
2319 wptr = readw(ofsAddr + TXwptr);
2320 mask = readw(ofsAddr + TX_mask);
2321 len = mask - ((wptr - rptr) & mask);
2322 return (len);
2323}
2324
2325int MoxaPortRxQueue(int port)
2326{
2327 void __iomem *ofsAddr;
2328 ushort rptr, wptr, mask;
2329 int len;
2330
8f8ecbad 2331 ofsAddr = moxa_ports[port].tableAddr;
1da177e4
LT		 2332 rptr = readw(ofsAddr + RXrptr);
2333 wptr = readw(ofsAddr + RXwptr);
2334 mask = readw(ofsAddr + RX_mask);
2335 len = (wptr - rptr) & mask;
2336 return (len);
2337}
2338
2339
2340void MoxaPortTxDisable(int port)
2341{
2342 void __iomem *ofsAddr;
2343
8f8ecbad 2344 ofsAddr = moxa_ports[port].tableAddr;
1da177e4
LT		 2345 moxafunc(ofsAddr, FC_SetXoffState, Magic_code);
2346}
2347
2348void MoxaPortTxEnable(int port)
2349{
2350 void __iomem *ofsAddr;
2351
8f8ecbad 2352 ofsAddr = moxa_ports[port].tableAddr;
1da177e4
LT		 2353 moxafunc(ofsAddr, FC_SetXonState, Magic_code);
2354}
2355
2356
2357int MoxaPortResetBrkCnt(int port)
2358{
2359 ushort cnt;
8f8ecbad
JS		 2360 cnt = moxa_ports[port].breakCnt;
2361 moxa_ports[port].breakCnt = 0;
1da177e4
LT		 2362 return (cnt);
2363}
2364
2365
2366void MoxaPortSendBreak(int port, int ms100)
2367{
2368 void __iomem *ofsAddr;
2369
8f8ecbad 2370 ofsAddr = moxa_ports[port].tableAddr;
1da177e4
LT		 2371 if (ms100) {
2372 moxafunc(ofsAddr, FC_SendBreak, Magic_code);
24c032f1 2373 msleep(ms100 * 10);
1da177e4
LT		 2374 } else {
2375 moxafunc(ofsAddr, FC_SendBreak, Magic_code);
24c032f1 2376 msleep(250);
1da177e4
LT		 2377 }
2378 moxafunc(ofsAddr, FC_StopBreak, Magic_code);
2379}
2380
8f8ecbad 2381static int moxa_get_serial_info(struct moxa_port *info,
1da177e4
LT		 2382 struct serial_struct __user *retinfo)
2383{
2384 struct serial_struct tmp;
2385
2386 memset(&tmp, 0, sizeof(tmp));
2387 tmp.type = info->type;
2388 tmp.line = info->port;
2389 tmp.port = 0;
2390 tmp.irq = 0;
2391 tmp.flags = info->asyncflags;
2392 tmp.baud_base = 921600;
2393 tmp.close_delay = info->close_delay;
2394 tmp.closing_wait = info->closing_wait;
2395 tmp.custom_divisor = 0;
2396 tmp.hub6 = 0;
2397 if(copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2398 return -EFAULT;
2399 return (0);
2400}
2401
2402
8f8ecbad 2403static int moxa_set_serial_info(struct moxa_port *info,
1da177e4
LT		 2404 struct serial_struct __user *new_info)
2405{
2406 struct serial_struct new_serial;
2407
2408 if(copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2409 return -EFAULT;
2410
2411 if ((new_serial.irq != 0) ||
2412 (new_serial.port != 0) ||
2413// (new_serial.type != info->type) ||
2414 (new_serial.custom_divisor != 0) ||
2415 (new_serial.baud_base != 921600))
2416 return (-EPERM);
2417
2418 if (!capable(CAP_SYS_ADMIN)) {
2419 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
2420 (info->asyncflags & ~ASYNC_USR_MASK)))
2421 return (-EPERM);
2422 } else {
2423 info->close_delay = new_serial.close_delay * HZ / 100;
2424 info->closing_wait = new_serial.closing_wait * HZ / 100;
2425 }
2426
2427 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
2428 new_serial.flags |= (info->asyncflags & ASYNC_FLAGS);
2429
2430 if (new_serial.type == PORT_16550A) {
2431 MoxaSetFifo(info->port, 1);
2432 } else {
2433 MoxaSetFifo(info->port, 0);
2434 }
2435
2436 info->type = new_serial.type;
2437 return (0);
2438}
2439
2440
2441
2442/*****************************************************************************
2443 * Static local functions: *
2444 *****************************************************************************/
1da177e4
LT		 2445static void moxafunc(void __iomem *ofsAddr, int cmd, ushort arg)
2446{
2447
2448 writew(arg, ofsAddr + FuncArg);
2449 writew(cmd, ofsAddr + FuncCode);
6f56b658 2450 moxa_wait_finish(ofsAddr);
1da177e4
LT		 2451}
2452
6f56b658 2453static void moxa_wait_finish(void __iomem *ofsAddr)
1da177e4
LT		 2454{
2455 unsigned long i, j;
2456
2457 i = jiffies;
2458 while (readw(ofsAddr + FuncCode) != 0) {
2459 j = jiffies;
2460 if ((j - i) > moxaFuncTout) {
2461 return;
2462 }
2463 }
2464}
2465
6f56b658 2466static void moxa_low_water_check(void __iomem *ofsAddr)
1da177e4
LT		 2467{
2468 int len;
2469 ushort rptr, wptr, mask;
2470
2471 if (readb(ofsAddr + FlagStat) & Xoff_state) {
2472 rptr = readw(ofsAddr + RXrptr);
2473 wptr = readw(ofsAddr + RXwptr);
2474 mask = readw(ofsAddr + RX_mask);
2475 len = (wptr - rptr) & mask;
2476 if (len <= Low_water)
2477 moxafunc(ofsAddr, FC_SendXon, 0);
2478 }
2479}
2480
2481static int moxaloadbios(int cardno, unsigned char __user *tmp, int len)
2482{
2483 void __iomem *baseAddr;
2484 int i;
2485
a2f72982 2486 if(len < 0 || len > sizeof(moxaBuff))
2487 return -EINVAL;
1da177e4
LT		 2488 if(copy_from_user(moxaBuff, tmp, len))
2489 return -EFAULT;
8f8ecbad 2490 baseAddr = moxa_boards[cardno].basemem;
1da177e4 2491 writeb(HW_reset, baseAddr + Control_reg); /* reset */
24c032f1 2492 msleep(10);
1da177e4
LT		 2493 for (i = 0; i < 4096; i++)
2494 writeb(0, baseAddr + i); /* clear fix page */
2495 for (i = 0; i < len; i++)
2496 writeb(moxaBuff[i], baseAddr + i); /* download BIOS */
2497 writeb(0, baseAddr + Control_reg); /* restart */
2498 return (0);
2499}
2500
2501static int moxafindcard(int cardno)
2502{
2503 void __iomem *baseAddr;
2504 ushort tmp;
2505
8f8ecbad 2506 baseAddr = moxa_boards[cardno].basemem;
1da177e4
LT		 2507 switch (moxa_boards[cardno].boardType) {
2508 case MOXA_BOARD_C218_ISA:
2509 case MOXA_BOARD_C218_PCI:
2510 if ((tmp = readw(baseAddr + C218_key)) != C218_KeyCode) {
2511 return (-1);
2512 }
2513 break;
2514 case MOXA_BOARD_CP204J:
2515 if ((tmp = readw(baseAddr + C218_key)) != CP204J_KeyCode) {
2516 return (-1);
2517 }
2518 break;
2519 default:
2520 if ((tmp = readw(baseAddr + C320_key)) != C320_KeyCode) {
2521 return (-1);
2522 }
2523 if ((tmp = readw(baseAddr + C320_status)) != STS_init) {
2524 return (-2);
2525 }
2526 }
2527 return (0);
2528}
2529
2530static int moxaload320b(int cardno, unsigned char __user *tmp, int len)
2531{
2532 void __iomem *baseAddr;
2533 int i;
2534
a2f72982 2535 if(len < 0 || len > sizeof(moxaBuff))
1da177e4
LT		 2536 return -EINVAL;
2537 if(copy_from_user(moxaBuff, tmp, len))
2538 return -EFAULT;
8f8ecbad 2539 baseAddr = moxa_boards[cardno].basemem;
1da177e4
LT		 2540 writew(len - 7168 - 2, baseAddr + C320bapi_len);
2541 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
2542 for (i = 0; i < 7168; i++)
2543 writeb(moxaBuff[i], baseAddr + DynPage_addr + i);
2544 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
2545 for (i = 0; i < (len - 7168); i++)
2546 writeb(moxaBuff[i + 7168], baseAddr + DynPage_addr + i);
2547 return (0);
2548}
2549
2550static int moxaloadcode(int cardno, unsigned char __user *tmp, int len)
2551{
2552 void __iomem *baseAddr, *ofsAddr;
2553 int retval, port, i;
2554
a2f72982 2555 if(len < 0 || len > sizeof(moxaBuff))
2556 return -EINVAL;
1da177e4
LT		 2557 if(copy_from_user(moxaBuff, tmp, len))
2558 return -EFAULT;
8f8ecbad 2559 baseAddr = moxa_boards[cardno].basemem;
1da177e4
LT		 2560 switch (moxa_boards[cardno].boardType) {
2561 case MOXA_BOARD_C218_ISA:
2562 case MOXA_BOARD_C218_PCI:
2563 case MOXA_BOARD_CP204J:
2564 retval = moxaloadc218(cardno, baseAddr, len);
2565 if (retval)
2566 return (retval);
2567 port = cardno * MAX_PORTS_PER_BOARD;
2568 for (i = 0; i < moxa_boards[cardno].numPorts; i++, port++) {
8f8ecbad
JS		 2569 struct moxa_port *p = &moxa_ports[port];
2570
2571 p->chkPort = 1;
2572 p->curBaud = 9600L;
2573 p->DCDState = 0;
2574 p->tableAddr = baseAddr + Extern_table + Extern_size * i;
2575 ofsAddr = p->tableAddr;
1da177e4
LT		 2576 writew(C218rx_mask, ofsAddr + RX_mask);
2577 writew(C218tx_mask, ofsAddr + TX_mask);
2578 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
2579 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
2580
2581 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
2582 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
2583
2584 }
2585 break;
2586 default:
2587 retval = moxaloadc320(cardno, baseAddr, len,
2588 &moxa_boards[cardno].numPorts);
2589 if (retval)
2590 return (retval);
2591 port = cardno * MAX_PORTS_PER_BOARD;
2592 for (i = 0; i < moxa_boards[cardno].numPorts; i++, port++) {
8f8ecbad
JS		 2593 struct moxa_port *p = &moxa_ports[port];
2594
2595 p->chkPort = 1;
2596 p->curBaud = 9600L;
2597 p->DCDState = 0;
2598 p->tableAddr = baseAddr + Extern_table + Extern_size * i;
2599 ofsAddr = p->tableAddr;
1da177e4
LT		 2600 if (moxa_boards[cardno].numPorts == 8) {
2601 writew(C320p8rx_mask, ofsAddr + RX_mask);
2602 writew(C320p8tx_mask, ofsAddr + TX_mask);
2603 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
2604 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
2605 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
2606 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
2607
2608 } else if (moxa_boards[cardno].numPorts == 16) {
2609 writew(C320p16rx_mask, ofsAddr + RX_mask);
2610 writew(C320p16tx_mask, ofsAddr + TX_mask);
2611 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
2612 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
2613 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
2614 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
2615
2616 } else if (moxa_boards[cardno].numPorts == 24) {
2617 writew(C320p24rx_mask, ofsAddr + RX_mask);
2618 writew(C320p24tx_mask, ofsAddr + TX_mask);
2619 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
2620 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
2621 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
2622 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
2623 } else if (moxa_boards[cardno].numPorts == 32) {
2624 writew(C320p32rx_mask, ofsAddr + RX_mask);
2625 writew(C320p32tx_mask, ofsAddr + TX_mask);
2626 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
2627 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
2628 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
2629 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
2630 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
2631 }
2632 }
2633 break;
2634 }
8f8ecbad 2635 moxa_boards[cardno].loadstat = 1;
1da177e4
LT		 2636 return (0);
2637}
2638
2639static int moxaloadc218(int cardno, void __iomem *baseAddr, int len)
2640{
2641 char retry;
2642 int i, j, len1, len2;
2643 ushort usum, *ptr, keycode;
2644
2645 if (moxa_boards[cardno].boardType == MOXA_BOARD_CP204J)
2646 keycode = CP204J_KeyCode;
2647 else
2648 keycode = C218_KeyCode;
2649 usum = 0;
2650 len1 = len >> 1;
2651 ptr = (ushort *) moxaBuff;
2652 for (i = 0; i < len1; i++)
01cfaf0d 2653 usum += le16_to_cpu(*(ptr + i));
1da177e4
LT		 2654 retry = 0;
2655 do {
2656 len1 = len >> 1;
2657 j = 0;
2658 while (len1) {
2659 len2 = (len1 > 2048) ? 2048 : len1;
2660 len1 -= len2;
2661 for (i = 0; i < len2 << 1; i++)
2662 writeb(moxaBuff[i + j], baseAddr + C218_LoadBuf + i);
2663 j += i;
2664
2665 writew(len2, baseAddr + C218DLoad_len);
2666 writew(0, baseAddr + C218_key);
2667 for (i = 0; i < 100; i++) {
2668 if (readw(baseAddr + C218_key) == keycode)
2669 break;
24c032f1 2670 msleep(10);
1da177e4
LT		 2671 }
2672 if (readw(baseAddr + C218_key) != keycode) {
2673 return (-1);
2674 }
2675 }
2676 writew(0, baseAddr + C218DLoad_len);
2677 writew(usum, baseAddr + C218check_sum);
2678 writew(0, baseAddr + C218_key);
2679 for (i = 0; i < 100; i++) {
2680 if (readw(baseAddr + C218_key) == keycode)
2681 break;
24c032f1 2682 msleep(10);
1da177e4
LT		 2683 }
2684 retry++;
2685 } while ((readb(baseAddr + C218chksum_ok) != 1) && (retry < 3));
2686 if (readb(baseAddr + C218chksum_ok) != 1) {
2687 return (-1);
2688 }
2689 writew(0, baseAddr + C218_key);
2690 for (i = 0; i < 100; i++) {
2691 if (readw(baseAddr + Magic_no) == Magic_code)
2692 break;
24c032f1 2693 msleep(10);
1da177e4
LT		 2694 }
2695 if (readw(baseAddr + Magic_no) != Magic_code) {
2696 return (-1);
2697 }
2698 writew(1, baseAddr + Disable_IRQ);
2699 writew(0, baseAddr + Magic_no);
2700 for (i = 0; i < 100; i++) {
2701 if (readw(baseAddr + Magic_no) == Magic_code)
2702 break;
24c032f1 2703 msleep(10);
1da177e4
LT		 2704 }
2705 if (readw(baseAddr + Magic_no) != Magic_code) {
2706 return (-1);
2707 }
2708 moxaCard = 1;
8f8ecbad
JS		 2709 moxa_boards[cardno].intNdx = baseAddr + IRQindex;
2710 moxa_boards[cardno].intPend = baseAddr + IRQpending;
2711 moxa_boards[cardno].intTable = baseAddr + IRQtable;
1da177e4
LT		 2712 return (0);
2713}
2714
2715static int moxaloadc320(int cardno, void __iomem *baseAddr, int len, int *numPorts)
2716{
2717 ushort usum;
2718 int i, j, wlen, len2, retry;
2719 ushort *uptr;
2720
2721 usum = 0;
2722 wlen = len >> 1;
2723 uptr = (ushort *) moxaBuff;
2724 for (i = 0; i < wlen; i++)
01cfaf0d 2725 usum += le16_to_cpu(uptr[i]);
1da177e4
LT		 2726 retry = 0;
2727 j = 0;
2728 do {
2729 while (wlen) {
2730 if (wlen > 2048)
2731 len2 = 2048;
2732 else
2733 len2 = wlen;
2734 wlen -= len2;
2735 len2 <<= 1;
2736 for (i = 0; i < len2; i++)
2737 writeb(moxaBuff[j + i], baseAddr + C320_LoadBuf + i);
2738 len2 >>= 1;
2739 j += i;
2740 writew(len2, baseAddr + C320DLoad_len);
2741 writew(0, baseAddr + C320_key);
2742 for (i = 0; i < 10; i++) {
2743 if (readw(baseAddr + C320_key) == C320_KeyCode)
2744 break;
24c032f1 2745 msleep(10);
1da177e4
LT		 2746 }
2747 if (readw(baseAddr + C320_key) != C320_KeyCode)
2748 return (-1);
2749 }
2750 writew(0, baseAddr + C320DLoad_len);
2751 writew(usum, baseAddr + C320check_sum);
2752 writew(0, baseAddr + C320_key);
2753 for (i = 0; i < 10; i++) {
2754 if (readw(baseAddr + C320_key) == C320_KeyCode)
2755 break;
24c032f1 2756 msleep(10);
1da177e4
LT		 2757 }
2758 retry++;
2759 } while ((readb(baseAddr + C320chksum_ok) != 1) && (retry < 3));
2760 if (readb(baseAddr + C320chksum_ok) != 1)
2761 return (-1);
2762 writew(0, baseAddr + C320_key);
2763 for (i = 0; i < 600; i++) {
2764 if (readw(baseAddr + Magic_no) == Magic_code)
2765 break;
24c032f1 2766 msleep(10);
1da177e4
LT		 2767 }
2768 if (readw(baseAddr + Magic_no) != Magic_code)
2769 return (-100);
2770
2771 if (moxa_boards[cardno].busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
2772 writew(0x3800, baseAddr + TMS320_PORT1);
2773 writew(0x3900, baseAddr + TMS320_PORT2);
2774 writew(28499, baseAddr + TMS320_CLOCK);
2775 } else {
2776 writew(0x3200, baseAddr + TMS320_PORT1);
2777 writew(0x3400, baseAddr + TMS320_PORT2);
2778 writew(19999, baseAddr + TMS320_CLOCK);
2779 }
2780 writew(1, baseAddr + Disable_IRQ);
2781 writew(0, baseAddr + Magic_no);
2782 for (i = 0; i < 500; i++) {
2783 if (readw(baseAddr + Magic_no) == Magic_code)
2784 break;
24c032f1 2785 msleep(10);
1da177e4
LT		 2786 }
2787 if (readw(baseAddr + Magic_no) != Magic_code)
2788 return (-102);
2789
2790 j = readw(baseAddr + Module_cnt);
2791 if (j <= 0)
2792 return (-101);
2793 *numPorts = j * 8;
2794 writew(j, baseAddr + Module_no);
2795 writew(0, baseAddr + Magic_no);
2796 for (i = 0; i < 600; i++) {
2797 if (readw(baseAddr + Magic_no) == Magic_code)
2798 break;
24c032f1 2799 msleep(10);
1da177e4
LT		 2800 }
2801 if (readw(baseAddr + Magic_no) != Magic_code)
2802 return (-102);
2803 moxaCard = 1;
8f8ecbad
JS		 2804 moxa_boards[cardno].intNdx = baseAddr + IRQindex;
2805 moxa_boards[cardno].intPend = baseAddr + IRQpending;
2806 moxa_boards[cardno].intTable = baseAddr + IRQtable;
1da177e4
LT		 2807 return (0);
2808}
2809
1da177e4
LT		 2810static void MoxaSetFifo(int port, int enable)
2811{
8f8ecbad 2812 void __iomem *ofsAddr = moxa_ports[port].tableAddr;
1da177e4
LT		 2813
2814 if (!enable) {
2815 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2816 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2817 } else {
2818 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2819 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
2820 }
2821}
Linux 6.x block layer and io_uring tree(s)