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Char: moxa, remove port->port
[linux-2.6/mini2440.git] / drivers / char / moxa.c
blobae5433c581615791e8ecc5ba24c69fe568dd7dcb
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.
14 */
15
16 /*
17 * MOXA Intellio Series Driver
18 * for : LINUX
19 * date : 1999/1/7
20 * version : 5.1
21 */
22
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/firmware.h>
29 #include <linux/signal.h>
30 #include <linux/sched.h>
31 #include <linux/timer.h>
32 #include <linux/interrupt.h>
33 #include <linux/tty.h>
34 #include <linux/tty_flip.h>
35 #include <linux/major.h>
36 #include <linux/string.h>
37 #include <linux/fcntl.h>
38 #include <linux/ptrace.h>
39 #include <linux/serial.h>
40 #include <linux/tty_driver.h>
41 #include <linux/delay.h>
42 #include <linux/pci.h>
43 #include <linux/init.h>
44 #include <linux/bitops.h>
45 #include <linux/completion.h>
46
47 #include <asm/system.h>
48 #include <asm/io.h>
49 #include <asm/uaccess.h>
50
51 #include "moxa.h"
52
53 #define MOXA_VERSION "5.1k"
54
55 #define MOXA_FW_HDRLEN 32
56
57 #define MOXAMAJOR 172
58 #define MOXACUMAJOR 173
59
60 #define MAX_BOARDS 4 /* Don't change this value */
61 #define MAX_PORTS_PER_BOARD 32 /* Don't change this value */
62 #define MAX_PORTS (MAX_BOARDS * MAX_PORTS_PER_BOARD)
63
64 /*
65 * Define the Moxa PCI vendor and device IDs.
66 */
67 #define MOXA_BUS_TYPE_ISA 0
68 #define MOXA_BUS_TYPE_PCI 1
69
70 enum {
71 MOXA_BOARD_C218_PCI = 1,
72 MOXA_BOARD_C218_ISA,
73 MOXA_BOARD_C320_PCI,
74 MOXA_BOARD_C320_ISA,
75 MOXA_BOARD_CP204J,
76 };
77
78 static char *moxa_brdname[] =
79 {
80 "C218 Turbo PCI series",
81 "C218 Turbo ISA series",
82 "C320 Turbo PCI series",
83 "C320 Turbo ISA series",
84 "CP-204J series",
85 };
86
87 #ifdef CONFIG_PCI
88 static struct pci_device_id moxa_pcibrds[] = {
89 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C218),
90 .driver_data = MOXA_BOARD_C218_PCI },
91 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C320),
92 .driver_data = MOXA_BOARD_C320_PCI },
93 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP204J),
94 .driver_data = MOXA_BOARD_CP204J },
95 { 0 }
96 };
97 MODULE_DEVICE_TABLE(pci, moxa_pcibrds);
98 #endif /* CONFIG_PCI */
99
100 struct moxa_port;
101
102 static struct moxa_board_conf {
103 int boardType;
104 int numPorts;
105 int busType;
106
107 int loadstat;
108
109 struct moxa_port *ports;
110
111 void __iomem *basemem;
112 void __iomem *intNdx;
113 void __iomem *intPend;
114 void __iomem *intTable;
115 } moxa_boards[MAX_BOARDS];
116
117 struct mxser_mstatus {
118 tcflag_t cflag;
119 int cts;
120 int dsr;
121 int ri;
122 int dcd;
123 };
124
125 struct moxaq_str {
126 int inq;
127 int outq;
128 };
129
130 struct moxa_port {
131 struct moxa_board_conf *board;
132 int type;
133 int close_delay;
134 unsigned short closing_wait;
135 int count;
136 int blocked_open;
137 long event; /* long req'd for set_bit --RR */
138 int asyncflags;
139 unsigned long statusflags;
140 struct tty_struct *tty;
141 int cflag;
142 wait_queue_head_t open_wait;
143 struct completion close_wait;
144
145 struct timer_list emptyTimer;
146
147 char chkPort;
148 char lineCtrl;
149 void __iomem *tableAddr;
150 long curBaud;
151 char DCDState;
152 char lowChkFlag;
153
154 ushort breakCnt;
155 };
156
157 /* statusflags */
158 #define TXSTOPPED 0x1
159 #define LOWWAIT 0x2
160 #define EMPTYWAIT 0x4
161 #define THROTTLE 0x8
162
163 #define SERIAL_DO_RESTART
164
165 #define WAKEUP_CHARS 256
166
167 static int ttymajor = MOXAMAJOR;
168 static int moxaCard;
169 /* Variables for insmod */
170 #ifdef MODULE
171 static unsigned long baseaddr[MAX_BOARDS];
172 static unsigned int type[MAX_BOARDS];
173 static unsigned int numports[MAX_BOARDS];
174 #endif
175
176 MODULE_AUTHOR("William Chen");
177 MODULE_DESCRIPTION("MOXA Intellio Family Multiport Board Device Driver");
178 MODULE_LICENSE("GPL");
179 #ifdef MODULE
180 module_param_array(type, uint, NULL, 0);
181 MODULE_PARM_DESC(type, "card type: C218=2, C320=4");
182 module_param_array(baseaddr, ulong, NULL, 0);
183 MODULE_PARM_DESC(baseaddr, "base address");
184 module_param_array(numports, uint, NULL, 0);
185 MODULE_PARM_DESC(numports, "numports (ignored for C218)");
186 #endif
187 module_param(ttymajor, int, 0);
188
189 /*
190 * static functions:
191 */
192 static int moxa_open(struct tty_struct *, struct file *);
193 static void moxa_close(struct tty_struct *, struct file *);
194 static int moxa_write(struct tty_struct *, const unsigned char *, int);
195 static int moxa_write_room(struct tty_struct *);
196 static void moxa_flush_buffer(struct tty_struct *);
197 static int moxa_chars_in_buffer(struct tty_struct *);
198 static void moxa_flush_chars(struct tty_struct *);
199 static void moxa_put_char(struct tty_struct *, unsigned char);
200 static int moxa_ioctl(struct tty_struct *, struct file *, unsigned int, unsigned long);
201 static void moxa_throttle(struct tty_struct *);
202 static void moxa_unthrottle(struct tty_struct *);
203 static void moxa_set_termios(struct tty_struct *, struct ktermios *);
204 static void moxa_stop(struct tty_struct *);
205 static void moxa_start(struct tty_struct *);
206 static void moxa_hangup(struct tty_struct *);
207 static int moxa_tiocmget(struct tty_struct *tty, struct file *file);
208 static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
209 unsigned int set, unsigned int clear);
210 static void moxa_poll(unsigned long);
211 static void moxa_set_tty_param(struct tty_struct *, struct ktermios *);
212 static int moxa_block_till_ready(struct tty_struct *, struct file *,
213 struct moxa_port *);
214 static void moxa_setup_empty_event(struct tty_struct *);
215 static void moxa_check_xmit_empty(unsigned long);
216 static void moxa_shut_down(struct moxa_port *);
217 static void moxa_receive_data(struct moxa_port *);
218 /*
219 * moxa board interface functions:
220 */
221 static int MoxaDriverIoctl(struct tty_struct *, unsigned int, unsigned long);
222 static int MoxaDriverPoll(void);
223 static int MoxaPortsOfCard(int);
224 static int MoxaPortIsValid(int);
225 static void MoxaPortEnable(struct moxa_port *);
226 static void MoxaPortDisable(struct moxa_port *);
227 static int MoxaPortSetTermio(struct moxa_port *, struct ktermios *, speed_t);
228 static int MoxaPortGetLineOut(struct moxa_port *, int *, int *);
229 static void MoxaPortLineCtrl(struct moxa_port *, int, int);
230 static void MoxaPortFlowCtrl(struct moxa_port *, int, int, int, int, int);
231 static int MoxaPortLineStatus(struct moxa_port *);
232 static int MoxaPortDCDChange(struct moxa_port *);
233 static int MoxaPortDCDON(struct moxa_port *);
234 static void MoxaPortFlushData(struct moxa_port *, int);
235 static int MoxaPortWriteData(struct moxa_port *, unsigned char *, int);
236 static int MoxaPortReadData(struct moxa_port *, struct tty_struct *tty);
237 static int MoxaPortTxQueue(struct moxa_port *);
238 static int MoxaPortRxQueue(struct moxa_port *);
239 static int MoxaPortTxFree(struct moxa_port *);
240 static void MoxaPortTxDisable(struct moxa_port *);
241 static void MoxaPortTxEnable(struct moxa_port *);
242 static int MoxaPortResetBrkCnt(struct moxa_port *);
243 static void MoxaPortSendBreak(struct moxa_port *, int);
244 static int moxa_get_serial_info(struct moxa_port *, struct serial_struct __user *);
245 static int moxa_set_serial_info(struct moxa_port *, struct serial_struct __user *);
246 static void MoxaSetFifo(struct moxa_port *port, int enable);
247
248 static const struct tty_operations moxa_ops = {
249 .open = moxa_open,
250 .close = moxa_close,
251 .write = moxa_write,
252 .write_room = moxa_write_room,
253 .flush_buffer = moxa_flush_buffer,
254 .chars_in_buffer = moxa_chars_in_buffer,
255 .flush_chars = moxa_flush_chars,
256 .put_char = moxa_put_char,
257 .ioctl = moxa_ioctl,
258 .throttle = moxa_throttle,
259 .unthrottle = moxa_unthrottle,
260 .set_termios = moxa_set_termios,
261 .stop = moxa_stop,
262 .start = moxa_start,
263 .hangup = moxa_hangup,
264 .tiocmget = moxa_tiocmget,
265 .tiocmset = moxa_tiocmset,
266 };
267
268 static struct tty_driver *moxaDriver;
269 static struct moxa_port moxa_ports[MAX_PORTS];
270 static DEFINE_TIMER(moxaTimer, moxa_poll, 0, 0);
271 static DEFINE_SPINLOCK(moxa_lock);
272
273 static int moxa_check_fw_model(struct moxa_board_conf *brd, u8 model)
274 {
275 switch (brd->boardType) {
276 case MOXA_BOARD_C218_ISA:
277 case MOXA_BOARD_C218_PCI:
278 if (model != 1)
279 goto err;
280 break;
281 case MOXA_BOARD_CP204J:
282 if (model != 3)
283 goto err;
284 break;
285 default:
286 if (model != 2)
287 goto err;
288 break;
289 }
290 return 0;
291 err:
292 return -EINVAL;
293 }
294
295 static int moxa_check_fw(const void *ptr)
296 {
297 const __le16 *lptr = ptr;
298
299 if (*lptr != cpu_to_le16(0x7980))
300 return -EINVAL;
301
302 return 0;
303 }
304
305 static int moxa_load_bios(struct moxa_board_conf *brd, const u8 *buf,
306 size_t len)
307 {
308 void __iomem *baseAddr = brd->basemem;
309 u16 tmp;
310
311 writeb(HW_reset, baseAddr + Control_reg); /* reset */
312 msleep(10);
313 memset_io(baseAddr, 0, 4096);
314 memcpy_toio(baseAddr, buf, len); /* download BIOS */
315 writeb(0, baseAddr + Control_reg); /* restart */
316
317 msleep(2000);
318
319 switch (brd->boardType) {
320 case MOXA_BOARD_C218_ISA:
321 case MOXA_BOARD_C218_PCI:
322 tmp = readw(baseAddr + C218_key);
323 if (tmp != C218_KeyCode)
324 goto err;
325 break;
326 case MOXA_BOARD_CP204J:
327 tmp = readw(baseAddr + C218_key);
328 if (tmp != CP204J_KeyCode)
329 goto err;
330 break;
331 default:
332 tmp = readw(baseAddr + C320_key);
333 if (tmp != C320_KeyCode)
334 goto err;
335 tmp = readw(baseAddr + C320_status);
336 if (tmp != STS_init) {
337 printk(KERN_ERR "moxa: bios upload failed -- CPU/Basic "
338 "module not found\n");
339 return -EIO;
340 }
341 break;
342 }
343
344 return 0;
345 err:
346 printk(KERN_ERR "moxa: bios upload failed -- board not found\n");
347 return -EIO;
348 }
349
350 static int moxa_load_320b(struct moxa_board_conf *brd, const u8 *ptr,
351 size_t len)
352 {
353 void __iomem *baseAddr = brd->basemem;
354
355 if (len < 7168) {
356 printk(KERN_ERR "moxa: invalid 320 bios -- too short\n");
357 return -EINVAL;
358 }
359
360 writew(len - 7168 - 2, baseAddr + C320bapi_len);
361 writeb(1, baseAddr + Control_reg); /* Select Page 1 */
362 memcpy_toio(baseAddr + DynPage_addr, ptr, 7168);
363 writeb(2, baseAddr + Control_reg); /* Select Page 2 */
364 memcpy_toio(baseAddr + DynPage_addr, ptr + 7168, len - 7168);
365
366 return 0;
367 }
368
369 static int moxa_real_load_code(struct moxa_board_conf *brd, const void *ptr,
370 size_t len)
371 {
372 void __iomem *baseAddr = brd->basemem;
373 const u16 *uptr = ptr;
374 size_t wlen, len2, j;
375 unsigned long key, loadbuf, loadlen, checksum, checksum_ok;
376 unsigned int i, retry, c320;
377 u16 usum, keycode;
378
379 c320 = brd->boardType == MOXA_BOARD_C320_PCI ||
380 brd->boardType == MOXA_BOARD_C320_ISA;
381 keycode = (brd->boardType == MOXA_BOARD_CP204J) ? CP204J_KeyCode :
382 C218_KeyCode;
383
384 switch (brd->boardType) {
385 case MOXA_BOARD_CP204J:
386 case MOXA_BOARD_C218_ISA:
387 case MOXA_BOARD_C218_PCI:
388 key = C218_key;
389 loadbuf = C218_LoadBuf;
390 loadlen = C218DLoad_len;
391 checksum = C218check_sum;
392 checksum_ok = C218chksum_ok;
393 break;
394 default:
395 key = C320_key;
396 keycode = C320_KeyCode;
397 loadbuf = C320_LoadBuf;
398 loadlen = C320DLoad_len;
399 checksum = C320check_sum;
400 checksum_ok = C320chksum_ok;
401 break;
402 }
403
404 usum = 0;
405 wlen = len >> 1;
406 for (i = 0; i < wlen; i++)
407 usum += le16_to_cpu(uptr[i]);
408 retry = 0;
409 do {
410 wlen = len >> 1;
411 j = 0;
412 while (wlen) {
413 len2 = (wlen > 2048) ? 2048 : wlen;
414 wlen -= len2;
415 memcpy_toio(baseAddr + loadbuf, ptr + j, len2 << 1);
416 j += len2 << 1;
417
418 writew(len2, baseAddr + loadlen);
419 writew(0, baseAddr + key);
420 for (i = 0; i < 100; i++) {
421 if (readw(baseAddr + key) == keycode)
422 break;
423 msleep(10);
424 }
425 if (readw(baseAddr + key) != keycode)
426 return -EIO;
427 }
428 writew(0, baseAddr + loadlen);
429 writew(usum, baseAddr + checksum);
430 writew(0, baseAddr + key);
431 for (i = 0; i < 100; i++) {
432 if (readw(baseAddr + key) == keycode)
433 break;
434 msleep(10);
435 }
436 retry++;
437 } while ((readb(baseAddr + checksum_ok) != 1) && (retry < 3));
438 if (readb(baseAddr + checksum_ok) != 1)
439 return -EIO;
440
441 writew(0, baseAddr + key);
442 for (i = 0; i < 600; i++) {
443 if (readw(baseAddr + Magic_no) == Magic_code)
444 break;
445 msleep(10);
446 }
447 if (readw(baseAddr + Magic_no) != Magic_code)
448 return -EIO;
449
450 if (c320) {
451 if (brd->busType == MOXA_BUS_TYPE_PCI) { /* ASIC board */
452 writew(0x3800, baseAddr + TMS320_PORT1);
453 writew(0x3900, baseAddr + TMS320_PORT2);
454 writew(28499, baseAddr + TMS320_CLOCK);
455 } else {
456 writew(0x3200, baseAddr + TMS320_PORT1);
457 writew(0x3400, baseAddr + TMS320_PORT2);
458 writew(19999, baseAddr + TMS320_CLOCK);
459 }
460 }
461 writew(1, baseAddr + Disable_IRQ);
462 writew(0, baseAddr + Magic_no);
463 for (i = 0; i < 500; i++) {
464 if (readw(baseAddr + Magic_no) == Magic_code)
465 break;
466 msleep(10);
467 }
468 if (readw(baseAddr + Magic_no) != Magic_code)
469 return -EIO;
470
471 if (c320) {
472 j = readw(baseAddr + Module_cnt);
473 if (j <= 0)
474 return -EIO;
475 brd->numPorts = j * 8;
476 writew(j, baseAddr + Module_no);
477 writew(0, baseAddr + Magic_no);
478 for (i = 0; i < 600; i++) {
479 if (readw(baseAddr + Magic_no) == Magic_code)
480 break;
481 msleep(10);
482 }
483 if (readw(baseAddr + Magic_no) != Magic_code)
484 return -EIO;
485 }
486 moxaCard = 1;
487 brd->intNdx = baseAddr + IRQindex;
488 brd->intPend = baseAddr + IRQpending;
489 brd->intTable = baseAddr + IRQtable;
490
491 return 0;
492 }
493
494 static int moxa_load_code(struct moxa_board_conf *brd, const void *ptr,
495 size_t len)
496 {
497 void __iomem *ofsAddr, *baseAddr = brd->basemem;
498 struct moxa_port *port;
499 int retval, i;
500
501 if (len % 2) {
502 printk(KERN_ERR "moxa: bios length is not even\n");
503 return -EINVAL;
504 }
505
506 retval = moxa_real_load_code(brd, ptr, len); /* may change numPorts */
507 if (retval)
508 return retval;
509
510 switch (brd->boardType) {
511 case MOXA_BOARD_C218_ISA:
512 case MOXA_BOARD_C218_PCI:
513 case MOXA_BOARD_CP204J:
514 port = brd->ports;
515 for (i = 0; i < brd->numPorts; i++, port++) {
516 port->board = brd;
517 port->chkPort = 1;
518 port->curBaud = 9600L;
519 port->DCDState = 0;
520 port->tableAddr = baseAddr + Extern_table +
521 Extern_size * i;
522 ofsAddr = port->tableAddr;
523 writew(C218rx_mask, ofsAddr + RX_mask);
524 writew(C218tx_mask, ofsAddr + TX_mask);
525 writew(C218rx_spage + i * C218buf_pageno, ofsAddr + Page_rxb);
526 writew(readw(ofsAddr + Page_rxb) + C218rx_pageno, ofsAddr + EndPage_rxb);
527
528 writew(C218tx_spage + i * C218buf_pageno, ofsAddr + Page_txb);
529 writew(readw(ofsAddr + Page_txb) + C218tx_pageno, ofsAddr + EndPage_txb);
530
531 }
532 break;
533 default:
534 port = brd->ports;
535 for (i = 0; i < brd->numPorts; i++, port++) {
536 port->board = brd;
537 port->chkPort = 1;
538 port->curBaud = 9600L;
539 port->DCDState = 0;
540 port->tableAddr = baseAddr + Extern_table +
541 Extern_size * i;
542 ofsAddr = port->tableAddr;
543 switch (brd->numPorts) {
544 case 8:
545 writew(C320p8rx_mask, ofsAddr + RX_mask);
546 writew(C320p8tx_mask, ofsAddr + TX_mask);
547 writew(C320p8rx_spage + i * C320p8buf_pgno, ofsAddr + Page_rxb);
548 writew(readw(ofsAddr + Page_rxb) + C320p8rx_pgno, ofsAddr + EndPage_rxb);
549 writew(C320p8tx_spage + i * C320p8buf_pgno, ofsAddr + Page_txb);
550 writew(readw(ofsAddr + Page_txb) + C320p8tx_pgno, ofsAddr + EndPage_txb);
551
552 break;
553 case 16:
554 writew(C320p16rx_mask, ofsAddr + RX_mask);
555 writew(C320p16tx_mask, ofsAddr + TX_mask);
556 writew(C320p16rx_spage + i * C320p16buf_pgno, ofsAddr + Page_rxb);
557 writew(readw(ofsAddr + Page_rxb) + C320p16rx_pgno, ofsAddr + EndPage_rxb);
558 writew(C320p16tx_spage + i * C320p16buf_pgno, ofsAddr + Page_txb);
559 writew(readw(ofsAddr + Page_txb) + C320p16tx_pgno, ofsAddr + EndPage_txb);
560 break;
561
562 case 24:
563 writew(C320p24rx_mask, ofsAddr + RX_mask);
564 writew(C320p24tx_mask, ofsAddr + TX_mask);
565 writew(C320p24rx_spage + i * C320p24buf_pgno, ofsAddr + Page_rxb);
566 writew(readw(ofsAddr + Page_rxb) + C320p24rx_pgno, ofsAddr + EndPage_rxb);
567 writew(C320p24tx_spage + i * C320p24buf_pgno, ofsAddr + Page_txb);
568 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
569 break;
570 case 32:
571 writew(C320p32rx_mask, ofsAddr + RX_mask);
572 writew(C320p32tx_mask, ofsAddr + TX_mask);
573 writew(C320p32tx_ofs, ofsAddr + Ofs_txb);
574 writew(C320p32rx_spage + i * C320p32buf_pgno, ofsAddr + Page_rxb);
575 writew(readb(ofsAddr + Page_rxb), ofsAddr + EndPage_rxb);
576 writew(C320p32tx_spage + i * C320p32buf_pgno, ofsAddr + Page_txb);
577 writew(readw(ofsAddr + Page_txb), ofsAddr + EndPage_txb);
578 break;
579 }
580 }
581 break;
582 }
583 brd->loadstat = 1;
584 return 0;
585 }
586
587 static int moxa_load_fw(struct moxa_board_conf *brd, const struct firmware *fw)
588 {
589 void *ptr = fw->data;
590 char rsn[64];
591 u16 lens[5];
592 size_t len;
593 unsigned int a, lenp, lencnt;
594 int ret = -EINVAL;
595 struct {
596 __le32 magic; /* 0x34303430 */
597 u8 reserved1[2];
598 u8 type; /* UNIX = 3 */
599 u8 model; /* C218T=1, C320T=2, CP204=3 */
600 u8 reserved2[8];
601 __le16 len[5];
602 } *hdr = ptr;
603
604 BUILD_BUG_ON(ARRAY_SIZE(hdr->len) != ARRAY_SIZE(lens));
605
606 if (fw->size < MOXA_FW_HDRLEN) {
607 strcpy(rsn, "too short (even header won't fit)");
608 goto err;
609 }
610 if (hdr->magic != cpu_to_le32(0x30343034)) {
611 sprintf(rsn, "bad magic: %.8x", le32_to_cpu(hdr->magic));
612 goto err;
613 }
614 if (hdr->type != 3) {
615 sprintf(rsn, "not for linux, type is %u", hdr->type);
616 goto err;
617 }
618 if (moxa_check_fw_model(brd, hdr->model)) {
619 sprintf(rsn, "not for this card, model is %u", hdr->model);
620 goto err;
621 }
622
623 len = MOXA_FW_HDRLEN;
624 lencnt = hdr->model == 2 ? 5 : 3;
625 for (a = 0; a < ARRAY_SIZE(lens); a++) {
626 lens[a] = le16_to_cpu(hdr->len[a]);
627 if (lens[a] && len + lens[a] <= fw->size &&
628 moxa_check_fw(&fw->data[len]))
629 printk(KERN_WARNING "moxa firmware: unexpected input "
630 "at offset %u, but going on\n", (u32)len);
631 if (!lens[a] && a < lencnt) {
632 sprintf(rsn, "too few entries in fw file");
633 goto err;
634 }
635 len += lens[a];
636 }
637
638 if (len != fw->size) {
639 sprintf(rsn, "bad length: %u (should be %u)", (u32)fw->size,
640 (u32)len);
641 goto err;
642 }
643
644 ptr += MOXA_FW_HDRLEN;
645 lenp = 0; /* bios */
646
647 strcpy(rsn, "read above");
648
649 ret = moxa_load_bios(brd, ptr, lens[lenp]);
650 if (ret)
651 goto err;
652
653 /* we skip the tty section (lens[1]), since we don't need it */
654 ptr += lens[lenp] + lens[lenp + 1];
655 lenp += 2; /* comm */
656
657 if (hdr->model == 2) {
658 ret = moxa_load_320b(brd, ptr, lens[lenp]);
659 if (ret)
660 goto err;
661 /* skip another tty */
662 ptr += lens[lenp] + lens[lenp + 1];
663 lenp += 2;
664 }
665
666 ret = moxa_load_code(brd, ptr, lens[lenp]);
667 if (ret)
668 goto err;
669
670 return 0;
671 err:
672 printk(KERN_ERR "firmware failed to load, reason: %s\n", rsn);
673 return ret;
674 }
675
676 static int moxa_init_board(struct moxa_board_conf *brd, struct device *dev)
677 {
678 const struct firmware *fw;
679 const char *file;
680 int ret;
681
682 switch (brd->boardType) {
683 case MOXA_BOARD_C218_ISA:
684 case MOXA_BOARD_C218_PCI:
685 file = "c218tunx.cod";
686 break;
687 case MOXA_BOARD_CP204J:
688 file = "cp204unx.cod";
689 break;
690 default:
691 file = "c320tunx.cod";
692 break;
693 }
694
695 ret = request_firmware(&fw, file, dev);
696 if (ret) {
697 printk(KERN_ERR "request_firmware failed\n");
698 goto end;
699 }
700
701 ret = moxa_load_fw(brd, fw);
702
703 release_firmware(fw);
704 end:
705 return ret;
706 }
707
708 #ifdef CONFIG_PCI
709 static int __devinit moxa_pci_probe(struct pci_dev *pdev,
710 const struct pci_device_id *ent)
711 {
712 struct moxa_board_conf *board;
713 unsigned int i;
714 int board_type = ent->driver_data;
715 int retval;
716
717 retval = pci_enable_device(pdev);
718 if (retval) {
719 dev_err(&pdev->dev, "can't enable pci device\n");
720 goto err;
721 }
722
723 for (i = 0; i < MAX_BOARDS; i++)
724 if (moxa_boards[i].basemem == NULL)
725 break;
726
727 retval = -ENODEV;
728 if (i >= MAX_BOARDS) {
729 dev_warn(&pdev->dev, "more than %u MOXA Intellio family boards "
730 "found. Board is ignored.\n", MAX_BOARDS);
731 goto err;
732 }
733
734 board = &moxa_boards[i];
735 board->ports = &moxa_ports[i * MAX_PORTS_PER_BOARD];
736
737 retval = pci_request_region(pdev, 2, "moxa-base");
738 if (retval) {
739 dev_err(&pdev->dev, "can't request pci region 2\n");
740 goto err;
741 }
742
743 board->basemem = ioremap(pci_resource_start(pdev, 2), 0x4000);
744 if (board->basemem == NULL) {
745 dev_err(&pdev->dev, "can't remap io space 2\n");
746 goto err_reg;
747 }
748
749 board->boardType = board_type;
750 switch (board_type) {
751 case MOXA_BOARD_C218_ISA:
752 case MOXA_BOARD_C218_PCI:
753 board->numPorts = 8;
754 break;
755
756 case MOXA_BOARD_CP204J:
757 board->numPorts = 4;
758 break;
759 default:
760 board->numPorts = 0;
761 break;
762 }
763 board->busType = MOXA_BUS_TYPE_PCI;
764
765 retval = moxa_init_board(board, &pdev->dev);
766 if (retval)
767 goto err_base;
768
769 pci_set_drvdata(pdev, board);
770
771 return (0);
772 err_base:
773 iounmap(board->basemem);
774 board->basemem = NULL;
775 err_reg:
776 pci_release_region(pdev, 2);
777 err:
778 return retval;
779 }
780
781 static void __devexit moxa_pci_remove(struct pci_dev *pdev)
782 {
783 struct moxa_board_conf *brd = pci_get_drvdata(pdev);
784
785 iounmap(brd->basemem);
786 brd->basemem = NULL;
787 pci_release_region(pdev, 2);
788 }
789
790 static struct pci_driver moxa_pci_driver = {
791 .name = "moxa",
792 .id_table = moxa_pcibrds,
793 .probe = moxa_pci_probe,
794 .remove = __devexit_p(moxa_pci_remove)
795 };
796 #endif /* CONFIG_PCI */
797
798 static int __init moxa_init(void)
799 {
800 struct moxa_port *ch;
801 unsigned int i, isabrds = 0;
802 int retval = 0;
803
804 printk(KERN_INFO "MOXA Intellio family driver version %s\n",
805 MOXA_VERSION);
806 moxaDriver = alloc_tty_driver(MAX_PORTS + 1);
807 if (!moxaDriver)
808 return -ENOMEM;
809
810 moxaDriver->owner = THIS_MODULE;
811 moxaDriver->name = "ttyMX";
812 moxaDriver->major = ttymajor;
813 moxaDriver->minor_start = 0;
814 moxaDriver->type = TTY_DRIVER_TYPE_SERIAL;
815 moxaDriver->subtype = SERIAL_TYPE_NORMAL;
816 moxaDriver->init_termios = tty_std_termios;
817 moxaDriver->init_termios.c_cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
818 moxaDriver->init_termios.c_ispeed = 9600;
819 moxaDriver->init_termios.c_ospeed = 9600;
820 moxaDriver->flags = TTY_DRIVER_REAL_RAW;
821 tty_set_operations(moxaDriver, &moxa_ops);
822
823 for (i = 0, ch = moxa_ports; i < MAX_PORTS; i++, ch++) {
824 ch->type = PORT_16550A;
825 ch->close_delay = 5 * HZ / 10;
826 ch->closing_wait = 30 * HZ;
827 ch->cflag = B9600 | CS8 | CREAD | CLOCAL | HUPCL;
828 init_waitqueue_head(&ch->open_wait);
829 init_completion(&ch->close_wait);
830
831 setup_timer(&ch->emptyTimer, moxa_check_xmit_empty,
832 (unsigned long)ch);
833 }
834
835 pr_debug("Moxa tty devices major number = %d\n", ttymajor);
836
837 if (tty_register_driver(moxaDriver)) {
838 printk(KERN_ERR "Couldn't install MOXA Smartio family driver !\n");
839 put_tty_driver(moxaDriver);
840 return -1;
841 }
842
843 mod_timer(&moxaTimer, jiffies + HZ / 50);
844
845 /* Find the boards defined from module args. */
846 #ifdef MODULE
847 {
848 struct moxa_board_conf *brd = moxa_boards;
849 for (i = 0; i < MAX_BOARDS; i++) {
850 if (!baseaddr[i])
851 break;
852 if (type[i] == MOXA_BOARD_C218_ISA ||
853 type[i] == MOXA_BOARD_C320_ISA) {
854 pr_debug("Moxa board %2d: %s board(baseAddr=%lx)\n",
855 isabrds + 1, moxa_brdname[type[i] - 1],
856 baseaddr[i]);
857 brd->boardType = type[i];
858 brd->ports = &moxa_ports[isabrds * MAX_PORTS_PER_BOARD];
859 brd->numPorts = type[i] == MOXA_BOARD_C218_ISA ? 8 :
860 numports[i];
861 brd->busType = MOXA_BUS_TYPE_ISA;
862 brd->basemem = ioremap(baseaddr[i], 0x4000);
863 if (!brd->basemem) {
864 printk(KERN_ERR "moxa: can't remap %lx\n",
865 baseaddr[i]);
866 continue;
867 }
868 if (moxa_init_board(brd, NULL)) {
869 iounmap(brd->basemem);
870 brd->basemem = NULL;
871 continue;
872 }
873
874 brd++;
875 isabrds++;
876 }
877 }
878 }
879 #endif
880
881 #ifdef CONFIG_PCI
882 retval = pci_register_driver(&moxa_pci_driver);
883 if (retval) {
884 printk(KERN_ERR "Can't register moxa pci driver!\n");
885 if (isabrds)
886 retval = 0;
887 }
888 #endif
889
890 return retval;
891 }
892
893 static void __exit moxa_exit(void)
894 {
895 int i;
896
897 del_timer_sync(&moxaTimer);
898
899 for (i = 0; i < MAX_PORTS; i++)
900 del_timer_sync(&moxa_ports[i].emptyTimer);
901
902 if (tty_unregister_driver(moxaDriver))
903 printk(KERN_ERR "Couldn't unregister MOXA Intellio family "
904 "serial driver\n");
905 put_tty_driver(moxaDriver);
906
907 #ifdef CONFIG_PCI
908 pci_unregister_driver(&moxa_pci_driver);
909 #endif
910
911 for (i = 0; i < MAX_BOARDS; i++)
912 if (moxa_boards[i].basemem)
913 iounmap(moxa_boards[i].basemem);
914 }
915
916 module_init(moxa_init);
917 module_exit(moxa_exit);
918
919 static int moxa_open(struct tty_struct *tty, struct file *filp)
920 {
921 struct moxa_port *ch;
922 int port;
923 int retval;
924
925 port = tty->index;
926 if (port == MAX_PORTS) {
927 return (0);
928 }
929 if (!MoxaPortIsValid(port)) {
930 tty->driver_data = NULL;
931 return (-ENODEV);
932 }
933
934 ch = &moxa_ports[port];
935 ch->count++;
936 tty->driver_data = ch;
937 ch->tty = tty;
938 if (!(ch->asyncflags & ASYNC_INITIALIZED)) {
939 ch->statusflags = 0;
940 moxa_set_tty_param(tty, tty->termios);
941 MoxaPortLineCtrl(ch, 1, 1);
942 MoxaPortEnable(ch);
943 ch->asyncflags |= ASYNC_INITIALIZED;
944 }
945 retval = moxa_block_till_ready(tty, filp, ch);
946
947 moxa_unthrottle(tty);
948
949 if (ch->type == PORT_16550A) {
950 MoxaSetFifo(ch, 1);
951 } else {
952 MoxaSetFifo(ch, 0);
953 }
954
955 return (retval);
956 }
957
958 static void moxa_close(struct tty_struct *tty, struct file *filp)
959 {
960 struct moxa_port *ch;
961 int port;
962
963 port = tty->index;
964 if (port == MAX_PORTS) {
965 return;
966 }
967 if (!MoxaPortIsValid(port)) {
968 pr_debug("Invalid portno in moxa_close\n");
969 tty->driver_data = NULL;
970 return;
971 }
972 if (tty->driver_data == NULL) {
973 return;
974 }
975 if (tty_hung_up_p(filp)) {
976 return;
977 }
978 ch = (struct moxa_port *) tty->driver_data;
979
980 if ((tty->count == 1) && (ch->count != 1)) {
981 printk(KERN_WARNING "moxa_close: bad serial port count; "
982 "tty->count is 1, ch->count is %d\n", ch->count);
983 ch->count = 1;
984 }
985 if (--ch->count < 0) {
986 printk(KERN_WARNING "moxa_close: bad serial port count, "
987 "device=%s\n", tty->name);
988 ch->count = 0;
989 }
990 if (ch->count) {
991 return;
992 }
993 ch->asyncflags |= ASYNC_CLOSING;
994
995 ch->cflag = tty->termios->c_cflag;
996 if (ch->asyncflags & ASYNC_INITIALIZED) {
997 moxa_setup_empty_event(tty);
998 tty_wait_until_sent(tty, 30 * HZ); /* 30 seconds timeout */
999 del_timer_sync(&ch->emptyTimer);
1000 }
1001 moxa_shut_down(ch);
1002 MoxaPortFlushData(ch, 2);
1003
1004 if (tty->driver->flush_buffer)
1005 tty->driver->flush_buffer(tty);
1006 tty_ldisc_flush(tty);
1007
1008 tty->closing = 0;
1009 ch->event = 0;
1010 ch->tty = NULL;
1011 if (ch->blocked_open) {
1012 if (ch->close_delay) {
1013 msleep_interruptible(jiffies_to_msecs(ch->close_delay));
1014 }
1015 wake_up_interruptible(&ch->open_wait);
1016 }
1017 ch->asyncflags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1018 complete_all(&ch->close_wait);
1019 }
1020
1021 static int moxa_write(struct tty_struct *tty,
1022 const unsigned char *buf, int count)
1023 {
1024 struct moxa_port *ch = tty->driver_data;
1025 unsigned long flags;
1026 int len;
1027
1028 if (ch == NULL)
1029 return 0;
1030
1031 spin_lock_irqsave(&moxa_lock, flags);
1032 len = MoxaPortWriteData(ch, (unsigned char *) buf, count);
1033 spin_unlock_irqrestore(&moxa_lock, flags);
1034
1035 /*********************************************
1036 if ( !(ch->statusflags & LOWWAIT) &&
1037 ((len != count) || (MoxaPortTxFree(port) <= 100)) )
1038 ************************************************/
1039 ch->statusflags |= LOWWAIT;
1040 return (len);
1041 }
1042
1043 static int moxa_write_room(struct tty_struct *tty)
1044 {
1045 struct moxa_port *ch;
1046
1047 if (tty->stopped)
1048 return (0);
1049 ch = tty->driver_data;
1050 if (ch == NULL)
1051 return (0);
1052 return MoxaPortTxFree(ch);
1053 }
1054
1055 static void moxa_flush_buffer(struct tty_struct *tty)
1056 {
1057 struct moxa_port *ch = tty->driver_data;
1058
1059 if (ch == NULL)
1060 return;
1061 MoxaPortFlushData(ch, 1);
1062 tty_wakeup(tty);
1063 }
1064
1065 static int moxa_chars_in_buffer(struct tty_struct *tty)
1066 {
1067 struct moxa_port *ch = tty->driver_data;
1068 int chars;
1069
1070 /*
1071 * Sigh...I have to check if driver_data is NULL here, because
1072 * if an open() fails, the TTY subsystem eventually calls
1073 * tty_wait_until_sent(), which calls the driver's chars_in_buffer()
1074 * routine. And since the open() failed, we return 0 here. TDJ
1075 */
1076 if (ch == NULL)
1077 return (0);
1078 chars = MoxaPortTxQueue(ch);
1079 if (chars) {
1080 /*
1081 * Make it possible to wakeup anything waiting for output
1082 * in tty_ioctl.c, etc.
1083 */
1084 if (!(ch->statusflags & EMPTYWAIT))
1085 moxa_setup_empty_event(tty);
1086 }
1087 return (chars);
1088 }
1089
1090 static void moxa_flush_chars(struct tty_struct *tty)
1091 {
1092 /*
1093 * Don't think I need this, because this is called to empty the TX
1094 * buffer for the 16450, 16550, etc.
1095 */
1096 }
1097
1098 static void moxa_put_char(struct tty_struct *tty, unsigned char c)
1099 {
1100 struct moxa_port *ch = tty->driver_data;
1101 unsigned long flags;
1102
1103 if (ch == NULL)
1104 return;
1105 spin_lock_irqsave(&moxa_lock, flags);
1106 MoxaPortWriteData(ch, &c, 1);
1107 spin_unlock_irqrestore(&moxa_lock, flags);
1108 /************************************************
1109 if ( !(ch->statusflags & LOWWAIT) && (MoxaPortTxFree(port) <= 100) )
1110 *************************************************/
1111 ch->statusflags |= LOWWAIT;
1112 }
1113
1114 static int moxa_tiocmget(struct tty_struct *tty, struct file *file)
1115 {
1116 struct moxa_port *ch = tty->driver_data;
1117 int flag = 0, dtr, rts;
1118
1119 if ((tty->index != MAX_PORTS) && (!ch))
1120 return (-EINVAL);
1121
1122 MoxaPortGetLineOut(ch, &dtr, &rts);
1123 if (dtr)
1124 flag |= TIOCM_DTR;
1125 if (rts)
1126 flag |= TIOCM_RTS;
1127 dtr = MoxaPortLineStatus(ch);
1128 if (dtr & 1)
1129 flag |= TIOCM_CTS;
1130 if (dtr & 2)
1131 flag |= TIOCM_DSR;
1132 if (dtr & 4)
1133 flag |= TIOCM_CD;
1134 return flag;
1135 }
1136
1137 static int moxa_tiocmset(struct tty_struct *tty, struct file *file,
1138 unsigned int set, unsigned int clear)
1139 {
1140 struct moxa_port *ch = tty->driver_data;
1141 int port;
1142 int dtr, rts;
1143
1144 port = tty->index;
1145 if ((port != MAX_PORTS) && (!ch))
1146 return (-EINVAL);
1147
1148 MoxaPortGetLineOut(ch, &dtr, &rts);
1149 if (set & TIOCM_RTS)
1150 rts = 1;
1151 if (set & TIOCM_DTR)
1152 dtr = 1;
1153 if (clear & TIOCM_RTS)
1154 rts = 0;
1155 if (clear & TIOCM_DTR)
1156 dtr = 0;
1157 MoxaPortLineCtrl(ch, dtr, rts);
1158 return 0;
1159 }
1160
1161 static int moxa_ioctl(struct tty_struct *tty, struct file *file,
1162 unsigned int cmd, unsigned long arg)
1163 {
1164 struct moxa_port *ch = tty->driver_data;
1165 register int port;
1166 void __user *argp = (void __user *)arg;
1167 int retval;
1168
1169 port = tty->index;
1170 if ((port != MAX_PORTS) && (!ch))
1171 return (-EINVAL);
1172
1173 switch (cmd) {
1174 case TCSBRK: /* SVID version: non-zero arg --> no break */
1175 retval = tty_check_change(tty);
1176 if (retval)
1177 return (retval);
1178 moxa_setup_empty_event(tty);
1179 tty_wait_until_sent(tty, 0);
1180 if (!arg)
1181 MoxaPortSendBreak(ch, 0);
1182 return (0);
1183 case TCSBRKP: /* support for POSIX tcsendbreak() */
1184 retval = tty_check_change(tty);
1185 if (retval)
1186 return (retval);
1187 moxa_setup_empty_event(tty);
1188 tty_wait_until_sent(tty, 0);
1189 MoxaPortSendBreak(ch, arg);
1190 return (0);
1191 case TIOCGSOFTCAR:
1192 return put_user(C_CLOCAL(tty) ? 1 : 0, (int __user *)argp);
1193 case TIOCSSOFTCAR:
1194 if (get_user(retval, (int __user *)argp))
1195 return -EFAULT;
1196 arg = retval;
1197 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) |
1198 (arg ? CLOCAL : 0));
1199 if (C_CLOCAL(tty))
1200 ch->asyncflags &= ~ASYNC_CHECK_CD;
1201 else
1202 ch->asyncflags |= ASYNC_CHECK_CD;
1203 return (0);
1204 case TIOCGSERIAL:
1205 return moxa_get_serial_info(ch, argp);
1206
1207 case TIOCSSERIAL:
1208 return moxa_set_serial_info(ch, argp);
1209 default:
1210 retval = MoxaDriverIoctl(tty, cmd, arg);
1211 }
1212 return (retval);
1213 }
1214
1215 static void moxa_throttle(struct tty_struct *tty)
1216 {
1217 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1218
1219 ch->statusflags |= THROTTLE;
1220 }
1221
1222 static void moxa_unthrottle(struct tty_struct *tty)
1223 {
1224 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1225
1226 ch->statusflags &= ~THROTTLE;
1227 }
1228
1229 static void moxa_set_termios(struct tty_struct *tty,
1230 struct ktermios *old_termios)
1231 {
1232 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1233
1234 if (ch == NULL)
1235 return;
1236 moxa_set_tty_param(tty, old_termios);
1237 if (!(old_termios->c_cflag & CLOCAL) &&
1238 (tty->termios->c_cflag & CLOCAL))
1239 wake_up_interruptible(&ch->open_wait);
1240 }
1241
1242 static void moxa_stop(struct tty_struct *tty)
1243 {
1244 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1245
1246 if (ch == NULL)
1247 return;
1248 MoxaPortTxDisable(ch);
1249 ch->statusflags |= TXSTOPPED;
1250 }
1251
1252
1253 static void moxa_start(struct tty_struct *tty)
1254 {
1255 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1256
1257 if (ch == NULL)
1258 return;
1259
1260 if (!(ch->statusflags & TXSTOPPED))
1261 return;
1262
1263 MoxaPortTxEnable(ch);
1264 ch->statusflags &= ~TXSTOPPED;
1265 }
1266
1267 static void moxa_hangup(struct tty_struct *tty)
1268 {
1269 struct moxa_port *ch = (struct moxa_port *) tty->driver_data;
1270
1271 moxa_flush_buffer(tty);
1272 moxa_shut_down(ch);
1273 ch->event = 0;
1274 ch->count = 0;
1275 ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE;
1276 ch->tty = NULL;
1277 wake_up_interruptible(&ch->open_wait);
1278 }
1279
1280 static void moxa_poll(unsigned long ignored)
1281 {
1282 register int card;
1283 struct moxa_port *ch;
1284 struct tty_struct *tp;
1285 int i, ports;
1286
1287 del_timer(&moxaTimer);
1288
1289 if (MoxaDriverPoll() < 0) {
1290 mod_timer(&moxaTimer, jiffies + HZ / 50);
1291 return;
1292 }
1293 for (card = 0; card < MAX_BOARDS; card++) {
1294 if ((ports = MoxaPortsOfCard(card)) <= 0)
1295 continue;
1296 ch = &moxa_ports[card * MAX_PORTS_PER_BOARD];
1297 for (i = 0; i < ports; i++, ch++) {
1298 if ((ch->asyncflags & ASYNC_INITIALIZED) == 0)
1299 continue;
1300 if (!(ch->statusflags & THROTTLE) &&
1301 (MoxaPortRxQueue(ch) > 0))
1302 moxa_receive_data(ch);
1303 if ((tp = ch->tty) == 0)
1304 continue;
1305 if (ch->statusflags & LOWWAIT) {
1306 if (MoxaPortTxQueue(ch) <= WAKEUP_CHARS) {
1307 if (!tp->stopped) {
1308 ch->statusflags &= ~LOWWAIT;
1309 tty_wakeup(tp);
1310 }
1311 }
1312 }
1313 if (!I_IGNBRK(tp) && (MoxaPortResetBrkCnt(ch) > 0)) {
1314 tty_insert_flip_char(tp, 0, TTY_BREAK);
1315 tty_schedule_flip(tp);
1316 }
1317 if (MoxaPortDCDChange(ch)) {
1318 if (ch->asyncflags & ASYNC_CHECK_CD) {
1319 if (MoxaPortDCDON(ch))
1320 wake_up_interruptible(&ch->open_wait);
1321 else {
1322 tty_hangup(tp);
1323 wake_up_interruptible(&ch->open_wait);
1324 ch->asyncflags &= ~ASYNC_NORMAL_ACTIVE;
1325 }
1326 }
1327 }
1328 }
1329 }
1330
1331 mod_timer(&moxaTimer, jiffies + HZ / 50);
1332 }
1333
1334 /******************************************************************************/
1335
1336 static void moxa_set_tty_param(struct tty_struct *tty, struct ktermios *old_termios)
1337 {
1338 register struct ktermios *ts;
1339 struct moxa_port *ch;
1340 int rts, cts, txflow, rxflow, xany, baud;
1341
1342 ch = (struct moxa_port *) tty->driver_data;
1343 ts = tty->termios;
1344 if (ts->c_cflag & CLOCAL)
1345 ch->asyncflags &= ~ASYNC_CHECK_CD;
1346 else
1347 ch->asyncflags |= ASYNC_CHECK_CD;
1348 rts = cts = txflow = rxflow = xany = 0;
1349 if (ts->c_cflag & CRTSCTS)
1350 rts = cts = 1;
1351 if (ts->c_iflag & IXON)
1352 txflow = 1;
1353 if (ts->c_iflag & IXOFF)
1354 rxflow = 1;
1355 if (ts->c_iflag & IXANY)
1356 xany = 1;
1357
1358 /* Clear the features we don't support */
1359 ts->c_cflag &= ~CMSPAR;
1360 MoxaPortFlowCtrl(ch, rts, cts, txflow, rxflow, xany);
1361 baud = MoxaPortSetTermio(ch, ts, tty_get_baud_rate(tty));
1362 if (baud == -1)
1363 baud = tty_termios_baud_rate(old_termios);
1364 /* Not put the baud rate into the termios data */
1365 tty_encode_baud_rate(tty, baud, baud);
1366 }
1367
1368 static int moxa_block_till_ready(struct tty_struct *tty, struct file *filp,
1369 struct moxa_port *ch)
1370 {
1371 DECLARE_WAITQUEUE(wait,current);
1372 unsigned long flags;
1373 int retval;
1374 int do_clocal = C_CLOCAL(tty);
1375
1376 /*
1377 * If the device is in the middle of being closed, then block
1378 * until it's done, and then try again.
1379 */
1380 if (tty_hung_up_p(filp) || (ch->asyncflags & ASYNC_CLOSING)) {
1381 if (ch->asyncflags & ASYNC_CLOSING)
1382 wait_for_completion_interruptible(&ch->close_wait);
1383 #ifdef SERIAL_DO_RESTART
1384 if (ch->asyncflags & ASYNC_HUP_NOTIFY)
1385 return (-EAGAIN);
1386 else
1387 return (-ERESTARTSYS);
1388 #else
1389 return (-EAGAIN);
1390 #endif
1391 }
1392 /*
1393 * If non-blocking mode is set, then make the check up front
1394 * and then exit.
1395 */
1396 if (filp->f_flags & O_NONBLOCK) {
1397 ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
1398 return (0);
1399 }
1400 /*
1401 * Block waiting for the carrier detect and the line to become free
1402 */
1403 retval = 0;
1404 add_wait_queue(&ch->open_wait, &wait);
1405 pr_debug("block_til_ready before block: ttys%d, count = %d\n",
1406 tty->index, ch->count);
1407 spin_lock_irqsave(&moxa_lock, flags);
1408 if (!tty_hung_up_p(filp))
1409 ch->count--;
1410 ch->blocked_open++;
1411 spin_unlock_irqrestore(&moxa_lock, flags);
1412
1413 while (1) {
1414 set_current_state(TASK_INTERRUPTIBLE);
1415 if (tty_hung_up_p(filp) ||
1416 !(ch->asyncflags & ASYNC_INITIALIZED)) {
1417 #ifdef SERIAL_DO_RESTART
1418 if (ch->asyncflags & ASYNC_HUP_NOTIFY)
1419 retval = -EAGAIN;
1420 else
1421 retval = -ERESTARTSYS;
1422 #else
1423 retval = -EAGAIN;
1424 #endif
1425 break;
1426 }
1427 if (!(ch->asyncflags & ASYNC_CLOSING) && (do_clocal ||
1428 MoxaPortDCDON(ch)))
1429 break;
1430
1431 if (signal_pending(current)) {
1432 retval = -ERESTARTSYS;
1433 break;
1434 }
1435 schedule();
1436 }
1437 set_current_state(TASK_RUNNING);
1438 remove_wait_queue(&ch->open_wait, &wait);
1439
1440 spin_lock_irqsave(&moxa_lock, flags);
1441 if (!tty_hung_up_p(filp))
1442 ch->count++;
1443 ch->blocked_open--;
1444 spin_unlock_irqrestore(&moxa_lock, flags);
1445 pr_debug("block_til_ready after blocking: ttys%d, count = %d\n",
1446 tty->index, ch->count);
1447 if (retval)
1448 return (retval);
1449 /* FIXME: review to see if we need to use set_bit on these */
1450 ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
1451 return 0;
1452 }
1453
1454 static void moxa_setup_empty_event(struct tty_struct *tty)
1455 {
1456 struct moxa_port *ch = tty->driver_data;
1457 unsigned long flags;
1458
1459 spin_lock_irqsave(&moxa_lock, flags);
1460 ch->statusflags |= EMPTYWAIT;
1461 mod_timer(&ch->emptyTimer, jiffies + HZ);
1462 spin_unlock_irqrestore(&moxa_lock, flags);
1463 }
1464
1465 static void moxa_check_xmit_empty(unsigned long data)
1466 {
1467 struct moxa_port *ch;
1468
1469 ch = (struct moxa_port *) data;
1470 if (ch->tty && (ch->statusflags & EMPTYWAIT)) {
1471 if (MoxaPortTxQueue(ch) == 0) {
1472 ch->statusflags &= ~EMPTYWAIT;
1473 tty_wakeup(ch->tty);
1474 return;
1475 }
1476 mod_timer(&ch->emptyTimer, round_jiffies(jiffies + HZ));
1477 } else
1478 ch->statusflags &= ~EMPTYWAIT;
1479 }
1480
1481 static void moxa_shut_down(struct moxa_port *ch)
1482 {
1483 struct tty_struct *tp;
1484
1485 if (!(ch->asyncflags & ASYNC_INITIALIZED))
1486 return;
1487
1488 tp = ch->tty;
1489
1490 MoxaPortDisable(ch);
1491
1492 /*
1493 * If we're a modem control device and HUPCL is on, drop RTS & DTR.
1494 */
1495 if (tp->termios->c_cflag & HUPCL)
1496 MoxaPortLineCtrl(ch, 0, 0);
1497
1498 ch->asyncflags &= ~ASYNC_INITIALIZED;
1499 }
1500
1501 static void moxa_receive_data(struct moxa_port *ch)
1502 {
1503 struct tty_struct *tp;
1504 struct ktermios *ts;
1505 unsigned long flags;
1506
1507 ts = NULL;
1508 tp = ch->tty;
1509 if (tp)
1510 ts = tp->termios;
1511 /**************************************************
1512 if ( !tp || !ts || !(ts->c_cflag & CREAD) ) {
1513 *****************************************************/
1514 if (!tp || !ts) {
1515 MoxaPortFlushData(ch, 0);
1516 return;
1517 }
1518 spin_lock_irqsave(&moxa_lock, flags);
1519 MoxaPortReadData(ch, tp);
1520 spin_unlock_irqrestore(&moxa_lock, flags);
1521 tty_schedule_flip(tp);
1522 }
1523
1524 /*
1525 * Query
1526 */
1527
1528 struct mon_str {
1529 int tick;
1530 int rxcnt[MAX_PORTS];
1531 int txcnt[MAX_PORTS];
1532 };
1533
1534 #define DCD_changed 0x01
1535 #define DCD_oldstate 0x80
1536
1537 static int moxaLowWaterChk;
1538 static struct mon_str moxaLog;
1539 static int moxaFuncTout = HZ / 2;
1540
1541 static void moxafunc(void __iomem *, int, ushort);
1542 static void moxa_wait_finish(void __iomem *);
1543 static void moxa_low_water_check(void __iomem *);
1544
1545 /*****************************************************************************
1546 * Driver level functions: *
1547 * 2. MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port); *
1548 * 3. MoxaDriverPoll(void); *
1549 *****************************************************************************/
1550 #define MOXA 0x400
1551 #define MOXA_GET_IQUEUE (MOXA + 1) /* get input buffered count */
1552 #define MOXA_GET_OQUEUE (MOXA + 2) /* get output buffered count */
1553 #define MOXA_GETDATACOUNT (MOXA + 23)
1554 #define MOXA_GET_IOQUEUE (MOXA + 27)
1555 #define MOXA_FLUSH_QUEUE (MOXA + 28)
1556 #define MOXA_GET_CONF (MOXA + 35) /* configuration */
1557 #define MOXA_GET_MAJOR (MOXA + 63)
1558 #define MOXA_GET_CUMAJOR (MOXA + 64)
1559 #define MOXA_GETMSTATUS (MOXA + 65)
1560
1561 static void MoxaPortFlushData(struct moxa_port *port, int mode)
1562 {
1563 void __iomem *ofsAddr;
1564 if ((mode < 0) || (mode > 2))
1565 return;
1566 ofsAddr = port->tableAddr;
1567 moxafunc(ofsAddr, FC_FlushQueue, mode);
1568 if (mode != 1) {
1569 port->lowChkFlag = 0;
1570 moxa_low_water_check(ofsAddr);
1571 }
1572 }
1573
1574 static int MoxaDriverIoctl(struct tty_struct *tty, unsigned int cmd,
1575 unsigned long arg)
1576 {
1577 struct moxa_port *port = tty->driver_data;
1578 int i;
1579 int status;
1580 void __user *argp = (void __user *)arg;
1581
1582 if (tty->index == MAX_PORTS) {
1583 if ((cmd != MOXA_GET_CONF) && (cmd != MOXA_GETDATACOUNT) &&
1584 (cmd != MOXA_GET_IOQUEUE) && (cmd != MOXA_GET_MAJOR) &&
1585 (cmd != MOXA_GET_CUMAJOR) && (cmd != MOXA_GETMSTATUS))
1586 return (-EINVAL);
1587 }
1588 switch (cmd) {
1589 case MOXA_GETDATACOUNT:
1590 moxaLog.tick = jiffies;
1591 if(copy_to_user(argp, &moxaLog, sizeof(struct mon_str)))
1592 return -EFAULT;
1593 return (0);
1594 case MOXA_FLUSH_QUEUE:
1595 MoxaPortFlushData(port, arg);
1596 return (0);
1597 case MOXA_GET_IOQUEUE: {
1598 struct moxaq_str __user *argm = argp;
1599 struct moxaq_str tmp;
1600
1601 for (i = 0; i < MAX_PORTS; i++, argm++) {
1602 memset(&tmp, 0, sizeof(tmp));
1603 if (moxa_ports[i].chkPort) {
1604 tmp.inq = MoxaPortRxQueue(&moxa_ports[i]);
1605 tmp.outq = MoxaPortTxQueue(&moxa_ports[i]);
1606 }
1607 if (copy_to_user(argm, &tmp, sizeof(tmp)))
1608 return -EFAULT;
1609 }
1610 return (0);
1611 } case MOXA_GET_OQUEUE:
1612 i = MoxaPortTxQueue(port);
1613 return put_user(i, (unsigned long __user *)argp);
1614 case MOXA_GET_IQUEUE:
1615 i = MoxaPortRxQueue(port);
1616 return put_user(i, (unsigned long __user *)argp);
1617 case MOXA_GET_MAJOR:
1618 if(copy_to_user(argp, &ttymajor, sizeof(int)))
1619 return -EFAULT;
1620 return 0;
1621 case MOXA_GET_CUMAJOR:
1622 i = 0;
1623 if(copy_to_user(argp, &i, sizeof(int)))
1624 return -EFAULT;
1625 return 0;
1626 case MOXA_GETMSTATUS: {
1627 struct mxser_mstatus __user *argm = argp;
1628 struct mxser_mstatus tmp;
1629 struct moxa_port *p;
1630
1631 for (i = 0; i < MAX_PORTS; i++, argm++) {
1632 p = &moxa_ports[i];
1633 memset(&tmp, 0, sizeof(tmp));
1634 if (!p->chkPort) {
1635 goto copy;
1636 } else {
1637 status = MoxaPortLineStatus(p);
1638 if (status & 1)
1639 tmp.cts = 1;
1640 if (status & 2)
1641 tmp.dsr = 1;
1642 if (status & 4)
1643 tmp.dcd = 1;
1644 }
1645
1646 if (!p->tty || !p->tty->termios)
1647 tmp.cflag = p->cflag;
1648 else
1649 tmp.cflag = p->tty->termios->c_cflag;
1650 copy:
1651 if (copy_to_user(argm, &tmp, sizeof(tmp)))
1652 return -EFAULT;
1653 }
1654 return 0;
1655 }
1656 }
1657
1658 return -ENOIOCTLCMD;
1659 }
1660
1661 int MoxaDriverPoll(void)
1662 {
1663 struct moxa_board_conf *brd;
1664 register ushort temp;
1665 register int card;
1666 void __iomem *ofsAddr;
1667 void __iomem *ip;
1668 int port, p, ports;
1669
1670 if (moxaCard == 0)
1671 return (-1);
1672 for (card = 0; card < MAX_BOARDS; card++) {
1673 brd = &moxa_boards[card];
1674 if (brd->loadstat == 0)
1675 continue;
1676 if ((ports = brd->numPorts) == 0)
1677 continue;
1678 if (readb(brd->intPend) == 0xff) {
1679 ip = brd->intTable + readb(brd->intNdx);
1680 p = card * MAX_PORTS_PER_BOARD;
1681 ports <<= 1;
1682 for (port = 0; port < ports; port += 2, p++) {
1683 if ((temp = readw(ip + port)) != 0) {
1684 writew(0, ip + port);
1685 ofsAddr = moxa_ports[p].tableAddr;
1686 if (temp & IntrTx)
1687 writew(readw(ofsAddr + HostStat) & ~WakeupTx, ofsAddr + HostStat);
1688 if (temp & IntrBreak) {
1689 moxa_ports[p].breakCnt++;
1690 }
1691 if (temp & IntrLine) {
1692 if (readb(ofsAddr + FlagStat) & DCD_state) {
1693 if ((moxa_ports[p].DCDState & DCD_oldstate) == 0)
1694 moxa_ports[p].DCDState = (DCD_oldstate |
1695 DCD_changed);
1696 } else {
1697 if (moxa_ports[p].DCDState & DCD_oldstate)
1698 moxa_ports[p].DCDState = DCD_changed;
1699 }
1700 }
1701 }
1702 }
1703 writeb(0, brd->intPend);
1704 }
1705 if (moxaLowWaterChk) {
1706 p = card * MAX_PORTS_PER_BOARD;
1707 for (port = 0; port < ports; port++, p++) {
1708 if (moxa_ports[p].lowChkFlag) {
1709 moxa_ports[p].lowChkFlag = 0;
1710 ofsAddr = moxa_ports[p].tableAddr;
1711 moxa_low_water_check(ofsAddr);
1712 }
1713 }
1714 }
1715 }
1716 moxaLowWaterChk = 0;
1717 return (0);
1718 }
1719
1720 /*****************************************************************************
1721 * Card level function: *
1722 * 1. MoxaPortsOfCard(int cardno); *
1723 *****************************************************************************/
1724 int MoxaPortsOfCard(int cardno)
1725 {
1726
1727 if (moxa_boards[cardno].boardType == 0)
1728 return (0);
1729 return (moxa_boards[cardno].numPorts);
1730 }
1731
1732 /*****************************************************************************
1733 * Port level functions: *
1734 * 1. MoxaPortIsValid(int port); *
1735 * 2. MoxaPortEnable(int port); *
1736 * 3. MoxaPortDisable(int port); *
1737 * 4. MoxaPortGetMaxBaud(int port); *
1738 * 6. MoxaPortSetBaud(int port, long baud); *
1739 * 8. MoxaPortSetTermio(int port, unsigned char *termio); *
1740 * 9. MoxaPortGetLineOut(int port, int *dtrState, int *rtsState); *
1741 * 10. MoxaPortLineCtrl(int port, int dtrState, int rtsState); *
1742 * 11. MoxaPortFlowCtrl(int port, int rts, int cts, int rx, int tx,int xany); *
1743 * 12. MoxaPortLineStatus(int port); *
1744 * 13. MoxaPortDCDChange(int port); *
1745 * 14. MoxaPortDCDON(int port); *
1746 * 15. MoxaPortFlushData(int port, int mode); *
1747 * 16. MoxaPortWriteData(int port, unsigned char * buffer, int length); *
1748 * 17. MoxaPortReadData(int port, struct tty_struct *tty); *
1749 * 20. MoxaPortTxQueue(int port); *
1750 * 21. MoxaPortTxFree(int port); *
1751 * 22. MoxaPortRxQueue(int port); *
1752 * 24. MoxaPortTxDisable(int port); *
1753 * 25. MoxaPortTxEnable(int port); *
1754 * 27. MoxaPortResetBrkCnt(int port); *
1755 * 30. MoxaPortSendBreak(int port, int ticks); *
1756 *****************************************************************************/
1757 /*
1758 * Moxa Port Number Description:
1759 *
1760 * MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
1761 * the port number using in MOXA driver functions will be 0 to 31 for
1762 * first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
1763 * to 127 for fourth. For example, if you setup three MOXA boards,
1764 * first board is C218, second board is C320-16 and third board is
1765 * C320-32. The port number of first board (C218 - 8 ports) is from
1766 * 0 to 7. The port number of second board (C320 - 16 ports) is form
1767 * 32 to 47. The port number of third board (C320 - 32 ports) is from
1768 * 64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
1769 * 127 will be invalid.
1770 *
1771 *
1772 * Moxa Functions Description:
1773 *
1774 * Function 1: Driver initialization routine, this routine must be
1775 * called when initialized driver.
1776 * Syntax:
1777 * void MoxaDriverInit();
1778 *
1779 *
1780 * Function 2: Moxa driver private IOCTL command processing.
1781 * Syntax:
1782 * int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
1783 *
1784 * unsigned int cmd : IOCTL command
1785 * unsigned long arg : IOCTL argument
1786 * int port : port number (0 - 127)
1787 *
1788 * return: 0 (OK)
1789 * -EINVAL
1790 * -ENOIOCTLCMD
1791 *
1792 *
1793 * Function 3: Moxa driver polling process routine.
1794 * Syntax:
1795 * int MoxaDriverPoll(void);
1796 *
1797 * return: 0 ; polling O.K.
1798 * -1 : no any Moxa card.
1799 *
1800 *
1801 * Function 4: Get the ports of this card.
1802 * Syntax:
1803 * int MoxaPortsOfCard(int cardno);
1804 *
1805 * int cardno : card number (0 - 3)
1806 *
1807 * return: 0 : this card is invalid
1808 * 8/16/24/32
1809 *
1810 *
1811 * Function 5: Check this port is valid or invalid
1812 * Syntax:
1813 * int MoxaPortIsValid(int port);
1814 * int port : port number (0 - 127, ref port description)
1815 *
1816 * return: 0 : this port is invalid
1817 * 1 : this port is valid
1818 *
1819 *
1820 * Function 6: Enable this port to start Tx/Rx data.
1821 * Syntax:
1822 * void MoxaPortEnable(int port);
1823 * int port : port number (0 - 127)
1824 *
1825 *
1826 * Function 7: Disable this port
1827 * Syntax:
1828 * void MoxaPortDisable(int port);
1829 * int port : port number (0 - 127)
1830 *
1831 *
1832 * Function 8: Get the maximun available baud rate of this port.
1833 * Syntax:
1834 * long MoxaPortGetMaxBaud(int port);
1835 * int port : port number (0 - 127)
1836 *
1837 * return: 0 : this port is invalid
1838 * 38400/57600/115200 bps
1839 *
1840 *
1841 * Function 10: Setting baud rate of this port.
1842 * Syntax:
1843 * long MoxaPortSetBaud(int port, long baud);
1844 * int port : port number (0 - 127)
1845 * long baud : baud rate (50 - 115200)
1846 *
1847 * return: 0 : this port is invalid or baud < 50
1848 * 50 - 115200 : the real baud rate set to the port, if
1849 * the argument baud is large than maximun
1850 * available baud rate, the real setting
1851 * baud rate will be the maximun baud rate.
1852 *
1853 *
1854 * Function 12: Configure the port.
1855 * Syntax:
1856 * int MoxaPortSetTermio(int port, struct ktermios *termio, speed_t baud);
1857 * int port : port number (0 - 127)
1858 * struct ktermios * termio : termio structure pointer
1859 * speed_t baud : baud rate
1860 *
1861 * return: -1 : this port is invalid or termio == NULL
1862 * 0 : setting O.K.
1863 *
1864 *
1865 * Function 13: Get the DTR/RTS state of this port.
1866 * Syntax:
1867 * int MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);
1868 * int port : port number (0 - 127)
1869 * int * dtrState : pointer to INT to receive the current DTR
1870 * state. (if NULL, this function will not
1871 * write to this address)
1872 * int * rtsState : pointer to INT to receive the current RTS
1873 * state. (if NULL, this function will not
1874 * write to this address)
1875 *
1876 * return: -1 : this port is invalid
1877 * 0 : O.K.
1878 *
1879 *
1880 * Function 14: Setting the DTR/RTS output state of this port.
1881 * Syntax:
1882 * void MoxaPortLineCtrl(int port, int dtrState, int rtsState);
1883 * int port : port number (0 - 127)
1884 * int dtrState : DTR output state (0: off, 1: on)
1885 * int rtsState : RTS output state (0: off, 1: on)
1886 *
1887 *
1888 * Function 15: Setting the flow control of this port.
1889 * Syntax:
1890 * void MoxaPortFlowCtrl(int port, int rtsFlow, int ctsFlow, int rxFlow,
1891 * int txFlow,int xany);
1892 * int port : port number (0 - 127)
1893 * int rtsFlow : H/W RTS flow control (0: no, 1: yes)
1894 * int ctsFlow : H/W CTS flow control (0: no, 1: yes)
1895 * int rxFlow : S/W Rx XON/XOFF flow control (0: no, 1: yes)
1896 * int txFlow : S/W Tx XON/XOFF flow control (0: no, 1: yes)
1897 * int xany : S/W XANY flow control (0: no, 1: yes)
1898 *
1899 *
1900 * Function 16: Get ths line status of this port
1901 * Syntax:
1902 * int MoxaPortLineStatus(int port);
1903 * int port : port number (0 - 127)
1904 *
1905 * return: Bit 0 - CTS state (0: off, 1: on)
1906 * Bit 1 - DSR state (0: off, 1: on)
1907 * Bit 2 - DCD state (0: off, 1: on)
1908 *
1909 *
1910 * Function 17: Check the DCD state has changed since the last read
1911 * of this function.
1912 * Syntax:
1913 * int MoxaPortDCDChange(int port);
1914 * int port : port number (0 - 127)
1915 *
1916 * return: 0 : no changed
1917 * 1 : DCD has changed
1918 *
1919 *
1920 * Function 18: Check ths current DCD state is ON or not.
1921 * Syntax:
1922 * int MoxaPortDCDON(int port);
1923 * int port : port number (0 - 127)
1924 *
1925 * return: 0 : DCD off
1926 * 1 : DCD on
1927 *
1928 *
1929 * Function 19: Flush the Rx/Tx buffer data of this port.
1930 * Syntax:
1931 * void MoxaPortFlushData(int port, int mode);
1932 * int port : port number (0 - 127)
1933 * int mode
1934 * 0 : flush the Rx buffer
1935 * 1 : flush the Tx buffer
1936 * 2 : flush the Rx and Tx buffer
1937 *
1938 *
1939 * Function 20: Write data.
1940 * Syntax:
1941 * int MoxaPortWriteData(int port, unsigned char * buffer, int length);
1942 * int port : port number (0 - 127)
1943 * unsigned char * buffer : pointer to write data buffer.
1944 * int length : write data length
1945 *
1946 * return: 0 - length : real write data length
1947 *
1948 *
1949 * Function 21: Read data.
1950 * Syntax:
1951 * int MoxaPortReadData(int port, struct tty_struct *tty);
1952 * int port : port number (0 - 127)
1953 * struct tty_struct *tty : tty for data
1954 *
1955 * return: 0 - length : real read data length
1956 *
1957 *
1958 * Function 24: Get the Tx buffer current queued data bytes
1959 * Syntax:
1960 * int MoxaPortTxQueue(int port);
1961 * int port : port number (0 - 127)
1962 *
1963 * return: .. : Tx buffer current queued data bytes
1964 *
1965 *
1966 * Function 25: Get the Tx buffer current free space
1967 * Syntax:
1968 * int MoxaPortTxFree(int port);
1969 * int port : port number (0 - 127)
1970 *
1971 * return: .. : Tx buffer current free space
1972 *
1973 *
1974 * Function 26: Get the Rx buffer current queued data bytes
1975 * Syntax:
1976 * int MoxaPortRxQueue(int port);
1977 * int port : port number (0 - 127)
1978 *
1979 * return: .. : Rx buffer current queued data bytes
1980 *
1981 *
1982 * Function 28: Disable port data transmission.
1983 * Syntax:
1984 * void MoxaPortTxDisable(int port);
1985 * int port : port number (0 - 127)
1986 *
1987 *
1988 * Function 29: Enable port data transmission.
1989 * Syntax:
1990 * void MoxaPortTxEnable(int port);
1991 * int port : port number (0 - 127)
1992 *
1993 *
1994 * Function 31: Get the received BREAK signal count and reset it.
1995 * Syntax:
1996 * int MoxaPortResetBrkCnt(int port);
1997 * int port : port number (0 - 127)
1998 *
1999 * return: 0 - .. : BREAK signal count
2000 *
2001 *
2002 * Function 34: Send out a BREAK signal.
2003 * Syntax:
2004 * void MoxaPortSendBreak(int port, int ms100);
2005 * int port : port number (0 - 127)
2006 * int ms100 : break signal time interval.
2007 * unit: 100 mini-second. if ms100 == 0, it will
2008 * send out a about 250 ms BREAK signal.
2009 *
2010 */
2011 static int MoxaPortIsValid(int port)
2012 {
2013 if (moxaCard == 0)
2014 return (0);
2015 if (moxa_ports[port].chkPort == 0)
2016 return (0);
2017 return (1);
2018 }
2019
2020 static void MoxaPortEnable(struct moxa_port *port)
2021 {
2022 void __iomem *ofsAddr;
2023 short lowwater = 512;
2024
2025 ofsAddr = port->tableAddr;
2026 writew(lowwater, ofsAddr + Low_water);
2027 port->breakCnt = 0;
2028 if (port->board->boardType == MOXA_BOARD_C320_ISA ||
2029 port->board->boardType == MOXA_BOARD_C320_PCI) {
2030 moxafunc(ofsAddr, FC_SetBreakIrq, 0);
2031 } else {
2032 writew(readw(ofsAddr + HostStat) | WakeupBreak, ofsAddr + HostStat);
2033 }
2034
2035 moxafunc(ofsAddr, FC_SetLineIrq, Magic_code);
2036 moxafunc(ofsAddr, FC_FlushQueue, 2);
2037
2038 moxafunc(ofsAddr, FC_EnableCH, Magic_code);
2039 MoxaPortLineStatus(port);
2040 }
2041
2042 static void MoxaPortDisable(struct moxa_port *port)
2043 {
2044 void __iomem *ofsAddr = port->tableAddr;
2045
2046 moxafunc(ofsAddr, FC_SetFlowCtl, 0); /* disable flow control */
2047 moxafunc(ofsAddr, FC_ClrLineIrq, Magic_code);
2048 writew(0, ofsAddr + HostStat);
2049 moxafunc(ofsAddr, FC_DisableCH, Magic_code);
2050 }
2051
2052 static long MoxaPortGetMaxBaud(struct moxa_port *port)
2053 {
2054 if (port->board->boardType == MOXA_BOARD_C320_ISA ||
2055 port->board->boardType == MOXA_BOARD_C320_PCI)
2056 return (460800L);
2057 else
2058 return (921600L);
2059 }
2060
2061
2062 static long MoxaPortSetBaud(struct moxa_port *port, long baud)
2063 {
2064 void __iomem *ofsAddr;
2065 long max, clock;
2066 unsigned int val;
2067
2068 if ((baud < 50L) || ((max = MoxaPortGetMaxBaud(port)) == 0))
2069 return (0);
2070 ofsAddr = port->tableAddr;
2071 if (baud > max)
2072 baud = max;
2073 if (max == 38400L)
2074 clock = 614400L; /* for 9.8304 Mhz : max. 38400 bps */
2075 else if (max == 57600L)
2076 clock = 691200L; /* for 11.0592 Mhz : max. 57600 bps */
2077 else
2078 clock = 921600L; /* for 14.7456 Mhz : max. 115200 bps */
2079 val = clock / baud;
2080 moxafunc(ofsAddr, FC_SetBaud, val);
2081 baud = clock / val;
2082 port->curBaud = baud;
2083 return (baud);
2084 }
2085
2086 static int MoxaPortSetTermio(struct moxa_port *port, struct ktermios *termio,
2087 speed_t baud)
2088 {
2089 void __iomem *ofsAddr;
2090 tcflag_t cflag;
2091 tcflag_t mode = 0;
2092
2093 if (port->chkPort == 0 || termio == 0)
2094 return (-1);
2095 ofsAddr = port->tableAddr;
2096 cflag = termio->c_cflag; /* termio->c_cflag */
2097
2098 mode = termio->c_cflag & CSIZE;
2099 if (mode == CS5)
2100 mode = MX_CS5;
2101 else if (mode == CS6)
2102 mode = MX_CS6;
2103 else if (mode == CS7)
2104 mode = MX_CS7;
2105 else if (mode == CS8)
2106 mode = MX_CS8;
2107
2108 if (termio->c_cflag & CSTOPB) {
2109 if (mode == MX_CS5)
2110 mode |= MX_STOP15;
2111 else
2112 mode |= MX_STOP2;
2113 } else
2114 mode |= MX_STOP1;
2115
2116 if (termio->c_cflag & PARENB) {
2117 if (termio->c_cflag & PARODD)
2118 mode |= MX_PARODD;
2119 else
2120 mode |= MX_PAREVEN;
2121 } else
2122 mode |= MX_PARNONE;
2123
2124 moxafunc(ofsAddr, FC_SetDataMode, (ushort) mode);
2125
2126 if (port->board->boardType == MOXA_BOARD_C320_ISA ||
2127 port->board->boardType == MOXA_BOARD_C320_PCI) {
2128 if (baud >= 921600L)
2129 return (-1);
2130 }
2131 baud = MoxaPortSetBaud(port, baud);
2132
2133 if (termio->c_iflag & (IXON | IXOFF | IXANY)) {
2134 writeb(termio->c_cc[VSTART], ofsAddr + FuncArg);
2135 writeb(termio->c_cc[VSTOP], ofsAddr + FuncArg1);
2136 writeb(FC_SetXonXoff, ofsAddr + FuncCode);
2137 moxa_wait_finish(ofsAddr);
2138
2139 }
2140 return (baud);
2141 }
2142
2143 static int MoxaPortGetLineOut(struct moxa_port *port, int *dtrState,
2144 int *rtsState)
2145 {
2146
2147 if (!MoxaPortIsValid(port->tty->index))
2148 return (-1);
2149 if (dtrState)
2150 *dtrState = !!(port->lineCtrl & DTR_ON);
2151 if (rtsState)
2152 *rtsState = !!(port->lineCtrl & RTS_ON);
2153
2154 return (0);
2155 }
2156
2157 static void MoxaPortLineCtrl(struct moxa_port *port, int dtr, int rts)
2158 {
2159 int mode = 0;
2160
2161 if (dtr)
2162 mode |= DTR_ON;
2163 if (rts)
2164 mode |= RTS_ON;
2165 port->lineCtrl = mode;
2166 moxafunc(port->tableAddr, FC_LineControl, mode);
2167 }
2168
2169 static void MoxaPortFlowCtrl(struct moxa_port *port, int rts, int cts,
2170 int txflow, int rxflow, int txany)
2171 {
2172 int mode = 0;
2173
2174 if (rts)
2175 mode |= RTS_FlowCtl;
2176 if (cts)
2177 mode |= CTS_FlowCtl;
2178 if (txflow)
2179 mode |= Tx_FlowCtl;
2180 if (rxflow)
2181 mode |= Rx_FlowCtl;
2182 if (txany)
2183 mode |= IXM_IXANY;
2184 moxafunc(port->tableAddr, FC_SetFlowCtl, mode);
2185 }
2186
2187 static int MoxaPortLineStatus(struct moxa_port *port)
2188 {
2189 void __iomem *ofsAddr;
2190 int val;
2191
2192 ofsAddr = port->tableAddr;
2193 if (port->board->boardType == MOXA_BOARD_C320_ISA ||
2194 port->board->boardType == MOXA_BOARD_C320_PCI) {
2195 moxafunc(ofsAddr, FC_LineStatus, 0);
2196 val = readw(ofsAddr + FuncArg);
2197 } else {
2198 val = readw(ofsAddr + FlagStat) >> 4;
2199 }
2200 val &= 0x0B;
2201 if (val & 8) {
2202 val |= 4;
2203 if ((port->DCDState & DCD_oldstate) == 0)
2204 port->DCDState = (DCD_oldstate | DCD_changed);
2205 } else {
2206 if (port->DCDState & DCD_oldstate)
2207 port->DCDState = DCD_changed;
2208 }
2209 val &= 7;
2210 return (val);
2211 }
2212
2213 static int MoxaPortDCDChange(struct moxa_port *port)
2214 {
2215 int n;
2216
2217 if (port->chkPort == 0)
2218 return (0);
2219 n = port->DCDState;
2220 port->DCDState &= ~DCD_changed;
2221 n &= DCD_changed;
2222 return (n);
2223 }
2224
2225 static int MoxaPortDCDON(struct moxa_port *port)
2226 {
2227 int n;
2228
2229 if (port->chkPort == 0)
2230 return (0);
2231 if (port->DCDState & DCD_oldstate)
2232 n = 1;
2233 else
2234 n = 0;
2235 return (n);
2236 }
2237
2238 static int MoxaPortWriteData(struct moxa_port *port, unsigned char *buffer,
2239 int len)
2240 {
2241 int c, total, i;
2242 ushort tail;
2243 int cnt;
2244 ushort head, tx_mask, spage, epage;
2245 ushort pageno, pageofs, bufhead;
2246 void __iomem *baseAddr, *ofsAddr, *ofs;
2247
2248 ofsAddr = port->tableAddr;
2249 baseAddr = port->board->basemem;
2250 tx_mask = readw(ofsAddr + TX_mask);
2251 spage = readw(ofsAddr + Page_txb);
2252 epage = readw(ofsAddr + EndPage_txb);
2253 tail = readw(ofsAddr + TXwptr);
2254 head = readw(ofsAddr + TXrptr);
2255 c = (head > tail) ? (head - tail - 1)
2256 : (head - tail + tx_mask);
2257 if (c > len)
2258 c = len;
2259 moxaLog.txcnt[port->tty->index] += c;
2260 total = c;
2261 if (spage == epage) {
2262 bufhead = readw(ofsAddr + Ofs_txb);
2263 writew(spage, baseAddr + Control_reg);
2264 while (c > 0) {
2265 if (head > tail)
2266 len = head - tail - 1;
2267 else
2268 len = tx_mask + 1 - tail;
2269 len = (c > len) ? len : c;
2270 ofs = baseAddr + DynPage_addr + bufhead + tail;
2271 for (i = 0; i < len; i++)
2272 writeb(*buffer++, ofs + i);
2273 tail = (tail + len) & tx_mask;
2274 c -= len;
2275 }
2276 writew(tail, ofsAddr + TXwptr);
2277 } else {
2278 len = c;
2279 pageno = spage + (tail >> 13);
2280 pageofs = tail & Page_mask;
2281 do {
2282 cnt = Page_size - pageofs;
2283 if (cnt > c)
2284 cnt = c;
2285 c -= cnt;
2286 writeb(pageno, baseAddr + Control_reg);
2287 ofs = baseAddr + DynPage_addr + pageofs;
2288 for (i = 0; i < cnt; i++)
2289 writeb(*buffer++, ofs + i);
2290 if (c == 0) {
2291 writew((tail + len) & tx_mask, ofsAddr + TXwptr);
2292 break;
2293 }
2294 if (++pageno == epage)
2295 pageno = spage;
2296 pageofs = 0;
2297 } while (1);
2298 }
2299 writeb(1, ofsAddr + CD180TXirq); /* start to send */
2300 return (total);
2301 }
2302
2303 static int MoxaPortReadData(struct moxa_port *port, struct tty_struct *tty)
2304 {
2305 register ushort head, pageofs;
2306 int i, count, cnt, len, total, remain;
2307 ushort tail, rx_mask, spage, epage;
2308 ushort pageno, bufhead;
2309 void __iomem *baseAddr, *ofsAddr, *ofs;
2310
2311 ofsAddr = port->tableAddr;
2312 baseAddr = port->board->basemem;
2313 head = readw(ofsAddr + RXrptr);
2314 tail = readw(ofsAddr + RXwptr);
2315 rx_mask = readw(ofsAddr + RX_mask);
2316 spage = readw(ofsAddr + Page_rxb);
2317 epage = readw(ofsAddr + EndPage_rxb);
2318 count = (tail >= head) ? (tail - head)
2319 : (tail - head + rx_mask + 1);
2320 if (count == 0)
2321 return 0;
2322
2323 total = count;
2324 remain = count - total;
2325 moxaLog.rxcnt[port->tty->index] += total;
2326 count = total;
2327 if (spage == epage) {
2328 bufhead = readw(ofsAddr + Ofs_rxb);
2329 writew(spage, baseAddr + Control_reg);
2330 while (count > 0) {
2331 if (tail >= head)
2332 len = tail - head;
2333 else
2334 len = rx_mask + 1 - head;
2335 len = (count > len) ? len : count;
2336 ofs = baseAddr + DynPage_addr + bufhead + head;
2337 for (i = 0; i < len; i++)
2338 tty_insert_flip_char(tty, readb(ofs + i), TTY_NORMAL);
2339 head = (head + len) & rx_mask;
2340 count -= len;
2341 }
2342 writew(head, ofsAddr + RXrptr);
2343 } else {
2344 len = count;
2345 pageno = spage + (head >> 13);
2346 pageofs = head & Page_mask;
2347 do {
2348 cnt = Page_size - pageofs;
2349 if (cnt > count)
2350 cnt = count;
2351 count -= cnt;
2352 writew(pageno, baseAddr + Control_reg);
2353 ofs = baseAddr + DynPage_addr + pageofs;
2354 for (i = 0; i < cnt; i++)
2355 tty_insert_flip_char(tty, readb(ofs + i), TTY_NORMAL);
2356 if (count == 0) {
2357 writew((head + len) & rx_mask, ofsAddr + RXrptr);
2358 break;
2359 }
2360 if (++pageno == epage)
2361 pageno = spage;
2362 pageofs = 0;
2363 } while (1);
2364 }
2365 if ((readb(ofsAddr + FlagStat) & Xoff_state) && (remain < LowWater)) {
2366 moxaLowWaterChk = 1;
2367 port->lowChkFlag = 1;
2368 }
2369 return (total);
2370 }
2371
2372
2373 static int MoxaPortTxQueue(struct moxa_port *port)
2374 {
2375 void __iomem *ofsAddr = port->tableAddr;
2376 ushort rptr, wptr, mask;
2377 int len;
2378
2379 rptr = readw(ofsAddr + TXrptr);
2380 wptr = readw(ofsAddr + TXwptr);
2381 mask = readw(ofsAddr + TX_mask);
2382 len = (wptr - rptr) & mask;
2383 return (len);
2384 }
2385
2386 static int MoxaPortTxFree(struct moxa_port *port)
2387 {
2388 void __iomem *ofsAddr = port->tableAddr;
2389 ushort rptr, wptr, mask;
2390 int len;
2391
2392 rptr = readw(ofsAddr + TXrptr);
2393 wptr = readw(ofsAddr + TXwptr);
2394 mask = readw(ofsAddr + TX_mask);
2395 len = mask - ((wptr - rptr) & mask);
2396 return (len);
2397 }
2398
2399 static int MoxaPortRxQueue(struct moxa_port *port)
2400 {
2401 void __iomem *ofsAddr = port->tableAddr;
2402 ushort rptr, wptr, mask;
2403 int len;
2404
2405 rptr = readw(ofsAddr + RXrptr);
2406 wptr = readw(ofsAddr + RXwptr);
2407 mask = readw(ofsAddr + RX_mask);
2408 len = (wptr - rptr) & mask;
2409 return (len);
2410 }
2411
2412
2413 static void MoxaPortTxDisable(struct moxa_port *port)
2414 {
2415 moxafunc(port->tableAddr, FC_SetXoffState, Magic_code);
2416 }
2417
2418 static void MoxaPortTxEnable(struct moxa_port *port)
2419 {
2420 moxafunc(port->tableAddr, FC_SetXonState, Magic_code);
2421 }
2422
2423
2424 static int MoxaPortResetBrkCnt(struct moxa_port *port)
2425 {
2426 ushort cnt;
2427 cnt = port->breakCnt;
2428 port->breakCnt = 0;
2429 return (cnt);
2430 }
2431
2432
2433 static void MoxaPortSendBreak(struct moxa_port *port, int ms100)
2434 {
2435 void __iomem *ofsAddr = port->tableAddr;
2436
2437 if (ms100) {
2438 moxafunc(ofsAddr, FC_SendBreak, Magic_code);
2439 msleep(ms100 * 10);
2440 } else {
2441 moxafunc(ofsAddr, FC_SendBreak, Magic_code);
2442 msleep(250);
2443 }
2444 moxafunc(ofsAddr, FC_StopBreak, Magic_code);
2445 }
2446
2447 static int moxa_get_serial_info(struct moxa_port *info,
2448 struct serial_struct __user *retinfo)
2449 {
2450 struct serial_struct tmp;
2451
2452 memset(&tmp, 0, sizeof(tmp));
2453 tmp.type = info->type;
2454 tmp.line = info->tty->index;
2455 tmp.port = 0;
2456 tmp.irq = 0;
2457 tmp.flags = info->asyncflags;
2458 tmp.baud_base = 921600;
2459 tmp.close_delay = info->close_delay;
2460 tmp.closing_wait = info->closing_wait;
2461 tmp.custom_divisor = 0;
2462 tmp.hub6 = 0;
2463 if(copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2464 return -EFAULT;
2465 return (0);
2466 }
2467
2468
2469 static int moxa_set_serial_info(struct moxa_port *info,
2470 struct serial_struct __user *new_info)
2471 {
2472 struct serial_struct new_serial;
2473
2474 if(copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2475 return -EFAULT;
2476
2477 if ((new_serial.irq != 0) ||
2478 (new_serial.port != 0) ||
2479 // (new_serial.type != info->type) ||
2480 (new_serial.custom_divisor != 0) ||
2481 (new_serial.baud_base != 921600))
2482 return (-EPERM);
2483
2484 if (!capable(CAP_SYS_ADMIN)) {
2485 if (((new_serial.flags & ~ASYNC_USR_MASK) !=
2486 (info->asyncflags & ~ASYNC_USR_MASK)))
2487 return (-EPERM);
2488 } else {
2489 info->close_delay = new_serial.close_delay * HZ / 100;
2490 info->closing_wait = new_serial.closing_wait * HZ / 100;
2491 }
2492
2493 new_serial.flags = (new_serial.flags & ~ASYNC_FLAGS);
2494 new_serial.flags |= (info->asyncflags & ASYNC_FLAGS);
2495
2496 if (new_serial.type == PORT_16550A) {
2497 MoxaSetFifo(info, 1);
2498 } else {
2499 MoxaSetFifo(info, 0);
2500 }
2501
2502 info->type = new_serial.type;
2503 return (0);
2504 }
2505
2506
2507
2508 /*****************************************************************************
2509 * Static local functions: *
2510 *****************************************************************************/
2511 static void moxafunc(void __iomem *ofsAddr, int cmd, ushort arg)
2512 {
2513
2514 writew(arg, ofsAddr + FuncArg);
2515 writew(cmd, ofsAddr + FuncCode);
2516 moxa_wait_finish(ofsAddr);
2517 }
2518
2519 static void moxa_wait_finish(void __iomem *ofsAddr)
2520 {
2521 unsigned long i, j;
2522
2523 i = jiffies;
2524 while (readw(ofsAddr + FuncCode) != 0) {
2525 j = jiffies;
2526 if ((j - i) > moxaFuncTout) {
2527 return;
2528 }
2529 }
2530 }
2531
2532 static void moxa_low_water_check(void __iomem *ofsAddr)
2533 {
2534 int len;
2535 ushort rptr, wptr, mask;
2536
2537 if (readb(ofsAddr + FlagStat) & Xoff_state) {
2538 rptr = readw(ofsAddr + RXrptr);
2539 wptr = readw(ofsAddr + RXwptr);
2540 mask = readw(ofsAddr + RX_mask);
2541 len = (wptr - rptr) & mask;
2542 if (len <= Low_water)
2543 moxafunc(ofsAddr, FC_SendXon, 0);
2544 }
2545 }
2546
2547 static void MoxaSetFifo(struct moxa_port *port, int enable)
2548 {
2549 void __iomem *ofsAddr = port->tableAddr;
2550
2551 if (!enable) {
2552 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 0);
2553 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 1);
2554 } else {
2555 moxafunc(ofsAddr, FC_SetRxFIFOTrig, 3);
2556 moxafunc(ofsAddr, FC_SetTxFIFOCnt, 16);
2557 }
2558 }
Support for the Chinese Samsung S3C2440 based development boards