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x86: PAT avoid aliasing in /dev/mem read/write
[linux-2.6/mini2440.git] / drivers / char / mxser.c
blob68c2e923469195295ed74c028eb360e2588e9a19
1 /*
2 * mxser.c -- MOXA Smartio/Industio family multiport serial driver.
3 *
4 * Copyright (C) 1999-2006 Moxa Technologies (support@moxa.com).
5 * Copyright (C) 2006-2008 Jiri Slaby <jirislaby@gmail.com>
6 *
7 * This code is loosely based on the 1.8 moxa driver which is based on
8 * Linux serial driver, written by Linus Torvalds, Theodore T'so and
9 * others.
10 *
11 * This program is free software; you can redistribute it and/or modify
12 * it under the terms of the GNU General Public License as published by
13 * the Free Software Foundation; either version 2 of the License, or
14 * (at your option) any later version.
15 *
16 * Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
17 * <alan@redhat.com>. The original 1.8 code is available on www.moxa.com.
18 * - Fixed x86_64 cleanness
19 * - Fixed sleep with spinlock held in mxser_send_break
20 */
21
22 #include <linux/module.h>
23 #include <linux/errno.h>
24 #include <linux/signal.h>
25 #include <linux/sched.h>
26 #include <linux/timer.h>
27 #include <linux/interrupt.h>
28 #include <linux/tty.h>
29 #include <linux/tty_flip.h>
30 #include <linux/serial.h>
31 #include <linux/serial_reg.h>
32 #include <linux/major.h>
33 #include <linux/string.h>
34 #include <linux/fcntl.h>
35 #include <linux/ptrace.h>
36 #include <linux/gfp.h>
37 #include <linux/ioport.h>
38 #include <linux/mm.h>
39 #include <linux/delay.h>
40 #include <linux/pci.h>
41 #include <linux/bitops.h>
42
43 #include <asm/system.h>
44 #include <asm/io.h>
45 #include <asm/irq.h>
46 #include <asm/uaccess.h>
47
48 #include "mxser.h"
49
50 #define MXSER_VERSION "2.0.3" /* 1.11 */
51 #define MXSERMAJOR 174
52 #define MXSERCUMAJOR 175
53
54 #define MXSER_BOARDS 4 /* Max. boards */
55 #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
56 #define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
57 #define MXSER_ISR_PASS_LIMIT 100
58
59 #define MXSER_ERR_IOADDR -1
60 #define MXSER_ERR_IRQ -2
61 #define MXSER_ERR_IRQ_CONFLIT -3
62 #define MXSER_ERR_VECTOR -4
63
64 /*CheckIsMoxaMust return value*/
65 #define MOXA_OTHER_UART 0x00
66 #define MOXA_MUST_MU150_HWID 0x01
67 #define MOXA_MUST_MU860_HWID 0x02
68
69 #define WAKEUP_CHARS 256
70
71 #define UART_MCR_AFE 0x20
72 #define UART_LSR_SPECIAL 0x1E
73
74 #define PCI_DEVICE_ID_CB108 0x1080
75 #define PCI_DEVICE_ID_CB114 0x1142
76 #define PCI_DEVICE_ID_CP114UL 0x1143
77 #define PCI_DEVICE_ID_CB134I 0x1341
78 #define PCI_DEVICE_ID_CP138U 0x1380
79 #define PCI_DEVICE_ID_POS104UL 0x1044
80
81
82 #define C168_ASIC_ID 1
83 #define C104_ASIC_ID 2
84 #define C102_ASIC_ID 0xB
85 #define CI132_ASIC_ID 4
86 #define CI134_ASIC_ID 3
87 #define CI104J_ASIC_ID 5
88
89 #define MXSER_HIGHBAUD 1
90 #define MXSER_HAS2 2
91
92 /* This is only for PCI */
93 static const struct {
94 int type;
95 int tx_fifo;
96 int rx_fifo;
97 int xmit_fifo_size;
98 int rx_high_water;
99 int rx_trigger;
100 int rx_low_water;
101 long max_baud;
102 } Gpci_uart_info[] = {
103 {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
104 {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
105 {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
106 };
107 #define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info)
108
109 struct mxser_cardinfo {
110 char *name;
111 unsigned int nports;
112 unsigned int flags;
113 };
114
115 static const struct mxser_cardinfo mxser_cards[] = {
116 /* 0*/ { "C168 series", 8, },
117 { "C104 series", 4, },
118 { "CI-104J series", 4, },
119 { "C168H/PCI series", 8, },
120 { "C104H/PCI series", 4, },
121 /* 5*/ { "C102 series", 4, MXSER_HAS2 }, /* C102-ISA */
122 { "CI-132 series", 4, MXSER_HAS2 },
123 { "CI-134 series", 4, },
124 { "CP-132 series", 2, },
125 { "CP-114 series", 4, },
126 /*10*/ { "CT-114 series", 4, },
127 { "CP-102 series", 2, MXSER_HIGHBAUD },
128 { "CP-104U series", 4, },
129 { "CP-168U series", 8, },
130 { "CP-132U series", 2, },
131 /*15*/ { "CP-134U series", 4, },
132 { "CP-104JU series", 4, },
133 { "Moxa UC7000 Serial", 8, }, /* RC7000 */
134 { "CP-118U series", 8, },
135 { "CP-102UL series", 2, },
136 /*20*/ { "CP-102U series", 2, },
137 { "CP-118EL series", 8, },
138 { "CP-168EL series", 8, },
139 { "CP-104EL series", 4, },
140 { "CB-108 series", 8, },
141 /*25*/ { "CB-114 series", 4, },
142 { "CB-134I series", 4, },
143 { "CP-138U series", 8, },
144 { "POS-104UL series", 4, },
145 { "CP-114UL series", 4, }
146 };
147
148 /* driver_data correspond to the lines in the structure above
149 see also ISA probe function before you change something */
150 static struct pci_device_id mxser_pcibrds[] = {
151 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168), .driver_data = 3 },
152 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104), .driver_data = 4 },
153 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132), .driver_data = 8 },
154 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114), .driver_data = 9 },
155 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114), .driver_data = 10 },
156 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102), .driver_data = 11 },
157 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 },
158 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 },
159 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 },
160 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 },
161 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 },
162 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 },
163 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 },
164 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 },
165 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 },
166 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 },
167 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 },
168 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 },
169 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108), .driver_data = 24 },
170 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114), .driver_data = 25 },
171 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I), .driver_data = 26 },
172 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U), .driver_data = 27 },
173 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL), .driver_data = 28 },
174 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL), .driver_data = 29 },
175 { }
176 };
177 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
178
179 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
180 static int ttymajor = MXSERMAJOR;
181
182 /* Variables for insmod */
183
184 MODULE_AUTHOR("Casper Yang");
185 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
186 module_param_array(ioaddr, int, NULL, 0);
187 module_param(ttymajor, int, 0);
188 MODULE_LICENSE("GPL");
189
190 struct mxser_log {
191 int tick;
192 unsigned long rxcnt[MXSER_PORTS];
193 unsigned long txcnt[MXSER_PORTS];
194 };
195
196
197 struct mxser_mon {
198 unsigned long rxcnt;
199 unsigned long txcnt;
200 unsigned long up_rxcnt;
201 unsigned long up_txcnt;
202 int modem_status;
203 unsigned char hold_reason;
204 };
205
206 struct mxser_mon_ext {
207 unsigned long rx_cnt[32];
208 unsigned long tx_cnt[32];
209 unsigned long up_rxcnt[32];
210 unsigned long up_txcnt[32];
211 int modem_status[32];
212
213 long baudrate[32];
214 int databits[32];
215 int stopbits[32];
216 int parity[32];
217 int flowctrl[32];
218 int fifo[32];
219 int iftype[32];
220 };
221
222 struct mxser_board;
223
224 struct mxser_port {
225 struct mxser_board *board;
226 struct tty_struct *tty;
227
228 unsigned long ioaddr;
229 unsigned long opmode_ioaddr;
230 int max_baud;
231
232 int rx_high_water;
233 int rx_trigger; /* Rx fifo trigger level */
234 int rx_low_water;
235 int baud_base; /* max. speed */
236 int type; /* UART type */
237 int flags; /* defined in tty.h */
238
239 int x_char; /* xon/xoff character */
240 int IER; /* Interrupt Enable Register */
241 int MCR; /* Modem control register */
242
243 unsigned char stop_rx;
244 unsigned char ldisc_stop_rx;
245
246 int custom_divisor;
247 int close_delay;
248 unsigned short closing_wait;
249 unsigned char err_shadow;
250 unsigned long event;
251
252 int count; /* # of fd on device */
253 int blocked_open; /* # of blocked opens */
254 struct async_icount icount; /* kernel counters for 4 input interrupts */
255 int timeout;
256
257 int read_status_mask;
258 int ignore_status_mask;
259 int xmit_fifo_size;
260 unsigned char *xmit_buf;
261 int xmit_head;
262 int xmit_tail;
263 int xmit_cnt;
264
265 struct ktermios normal_termios;
266
267 struct mxser_mon mon_data;
268
269 spinlock_t slock;
270 wait_queue_head_t open_wait;
271 wait_queue_head_t delta_msr_wait;
272 };
273
274 struct mxser_board {
275 unsigned int idx;
276 int irq;
277 const struct mxser_cardinfo *info;
278 unsigned long vector;
279 unsigned long vector_mask;
280
281 int chip_flag;
282 int uart_type;
283
284 struct mxser_port ports[MXSER_PORTS_PER_BOARD];
285 };
286
287 struct mxser_mstatus {
288 tcflag_t cflag;
289 int cts;
290 int dsr;
291 int ri;
292 int dcd;
293 };
294
295 static struct mxser_mstatus GMStatus[MXSER_PORTS];
296
297 static int mxserBoardCAP[MXSER_BOARDS] = {
298 0, 0, 0, 0
299 /* 0x180, 0x280, 0x200, 0x320 */
300 };
301
302 static struct mxser_board mxser_boards[MXSER_BOARDS];
303 static struct tty_driver *mxvar_sdriver;
304 static struct mxser_log mxvar_log;
305 static int mxvar_diagflag;
306 static unsigned char mxser_msr[MXSER_PORTS + 1];
307 static struct mxser_mon_ext mon_data_ext;
308 static int mxser_set_baud_method[MXSER_PORTS + 1];
309
310 #ifdef CONFIG_PCI
311 static int __devinit CheckIsMoxaMust(unsigned long io)
312 {
313 u8 oldmcr, hwid;
314 int i;
315
316 outb(0, io + UART_LCR);
317 DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
318 oldmcr = inb(io + UART_MCR);
319 outb(0, io + UART_MCR);
320 SET_MOXA_MUST_XON1_VALUE(io, 0x11);
321 if ((hwid = inb(io + UART_MCR)) != 0) {
322 outb(oldmcr, io + UART_MCR);
323 return MOXA_OTHER_UART;
324 }
325
326 GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
327 for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
328 if (hwid == Gpci_uart_info[i].type)
329 return (int)hwid;
330 }
331 return MOXA_OTHER_UART;
332 }
333 #endif
334
335 static void process_txrx_fifo(struct mxser_port *info)
336 {
337 int i;
338
339 if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
340 info->rx_trigger = 1;
341 info->rx_high_water = 1;
342 info->rx_low_water = 1;
343 info->xmit_fifo_size = 1;
344 } else
345 for (i = 0; i < UART_INFO_NUM; i++)
346 if (info->board->chip_flag == Gpci_uart_info[i].type) {
347 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
348 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
349 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
350 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
351 break;
352 }
353 }
354
355 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
356 {
357 unsigned char status = 0;
358
359 status = inb(baseaddr + UART_MSR);
360
361 mxser_msr[port] &= 0x0F;
362 mxser_msr[port] |= status;
363 status = mxser_msr[port];
364 if (mode)
365 mxser_msr[port] = 0;
366
367 return status;
368 }
369
370 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
371 struct mxser_port *port)
372 {
373 DECLARE_WAITQUEUE(wait, current);
374 int retval;
375 int do_clocal = 0;
376 unsigned long flags;
377
378 /*
379 * If non-blocking mode is set, or the port is not enabled,
380 * then make the check up front and then exit.
381 */
382 if ((filp->f_flags & O_NONBLOCK) ||
383 test_bit(TTY_IO_ERROR, &tty->flags)) {
384 port->flags |= ASYNC_NORMAL_ACTIVE;
385 return 0;
386 }
387
388 if (tty->termios->c_cflag & CLOCAL)
389 do_clocal = 1;
390
391 /*
392 * Block waiting for the carrier detect and the line to become
393 * free (i.e., not in use by the callout). While we are in
394 * this loop, port->count is dropped by one, so that
395 * mxser_close() knows when to free things. We restore it upon
396 * exit, either normal or abnormal.
397 */
398 retval = 0;
399 add_wait_queue(&port->open_wait, &wait);
400
401 spin_lock_irqsave(&port->slock, flags);
402 if (!tty_hung_up_p(filp))
403 port->count--;
404 spin_unlock_irqrestore(&port->slock, flags);
405 port->blocked_open++;
406 while (1) {
407 spin_lock_irqsave(&port->slock, flags);
408 outb(inb(port->ioaddr + UART_MCR) |
409 UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR);
410 spin_unlock_irqrestore(&port->slock, flags);
411 set_current_state(TASK_INTERRUPTIBLE);
412 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
413 if (port->flags & ASYNC_HUP_NOTIFY)
414 retval = -EAGAIN;
415 else
416 retval = -ERESTARTSYS;
417 break;
418 }
419 if (!(port->flags & ASYNC_CLOSING) &&
420 (do_clocal ||
421 (inb(port->ioaddr + UART_MSR) & UART_MSR_DCD)))
422 break;
423 if (signal_pending(current)) {
424 retval = -ERESTARTSYS;
425 break;
426 }
427 schedule();
428 }
429 set_current_state(TASK_RUNNING);
430 remove_wait_queue(&port->open_wait, &wait);
431 if (!tty_hung_up_p(filp))
432 port->count++;
433 port->blocked_open--;
434 if (retval)
435 return retval;
436 port->flags |= ASYNC_NORMAL_ACTIVE;
437 return 0;
438 }
439
440 static int mxser_set_baud(struct mxser_port *info, long newspd)
441 {
442 int quot = 0, baud;
443 unsigned char cval;
444
445 if (!info->tty || !info->tty->termios)
446 return -1;
447
448 if (!(info->ioaddr))
449 return -1;
450
451 if (newspd > info->max_baud)
452 return -1;
453
454 if (newspd == 134) {
455 quot = 2 * info->baud_base / 269;
456 tty_encode_baud_rate(info->tty, 134, 134);
457 } else if (newspd) {
458 quot = info->baud_base / newspd;
459 if (quot == 0)
460 quot = 1;
461 baud = info->baud_base/quot;
462 tty_encode_baud_rate(info->tty, baud, baud);
463 } else {
464 quot = 0;
465 }
466
467 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
468 info->timeout += HZ / 50; /* Add .02 seconds of slop */
469
470 if (quot) {
471 info->MCR |= UART_MCR_DTR;
472 outb(info->MCR, info->ioaddr + UART_MCR);
473 } else {
474 info->MCR &= ~UART_MCR_DTR;
475 outb(info->MCR, info->ioaddr + UART_MCR);
476 return 0;
477 }
478
479 cval = inb(info->ioaddr + UART_LCR);
480
481 outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
482
483 outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
484 outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
485 outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
486
487 #ifdef BOTHER
488 if (C_BAUD(info->tty) == BOTHER) {
489 quot = info->baud_base % newspd;
490 quot *= 8;
491 if (quot % newspd > newspd / 2) {
492 quot /= newspd;
493 quot++;
494 } else
495 quot /= newspd;
496
497 SET_MOXA_MUST_ENUM_VALUE(info->ioaddr, quot);
498 } else
499 #endif
500 SET_MOXA_MUST_ENUM_VALUE(info->ioaddr, 0);
501
502 return 0;
503 }
504
505 /*
506 * This routine is called to set the UART divisor registers to match
507 * the specified baud rate for a serial port.
508 */
509 static int mxser_change_speed(struct mxser_port *info,
510 struct ktermios *old_termios)
511 {
512 unsigned cflag, cval, fcr;
513 int ret = 0;
514 unsigned char status;
515
516 if (!info->tty || !info->tty->termios)
517 return ret;
518 cflag = info->tty->termios->c_cflag;
519 if (!(info->ioaddr))
520 return ret;
521
522 if (mxser_set_baud_method[info->tty->index] == 0)
523 mxser_set_baud(info, tty_get_baud_rate(info->tty));
524
525 /* byte size and parity */
526 switch (cflag & CSIZE) {
527 case CS5:
528 cval = 0x00;
529 break;
530 case CS6:
531 cval = 0x01;
532 break;
533 case CS7:
534 cval = 0x02;
535 break;
536 case CS8:
537 cval = 0x03;
538 break;
539 default:
540 cval = 0x00;
541 break; /* too keep GCC shut... */
542 }
543 if (cflag & CSTOPB)
544 cval |= 0x04;
545 if (cflag & PARENB)
546 cval |= UART_LCR_PARITY;
547 if (!(cflag & PARODD))
548 cval |= UART_LCR_EPAR;
549 if (cflag & CMSPAR)
550 cval |= UART_LCR_SPAR;
551
552 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
553 if (info->board->chip_flag) {
554 fcr = UART_FCR_ENABLE_FIFO;
555 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
556 SET_MOXA_MUST_FIFO_VALUE(info);
557 } else
558 fcr = 0;
559 } else {
560 fcr = UART_FCR_ENABLE_FIFO;
561 if (info->board->chip_flag) {
562 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
563 SET_MOXA_MUST_FIFO_VALUE(info);
564 } else {
565 switch (info->rx_trigger) {
566 case 1:
567 fcr |= UART_FCR_TRIGGER_1;
568 break;
569 case 4:
570 fcr |= UART_FCR_TRIGGER_4;
571 break;
572 case 8:
573 fcr |= UART_FCR_TRIGGER_8;
574 break;
575 default:
576 fcr |= UART_FCR_TRIGGER_14;
577 break;
578 }
579 }
580 }
581
582 /* CTS flow control flag and modem status interrupts */
583 info->IER &= ~UART_IER_MSI;
584 info->MCR &= ~UART_MCR_AFE;
585 if (cflag & CRTSCTS) {
586 info->flags |= ASYNC_CTS_FLOW;
587 info->IER |= UART_IER_MSI;
588 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
589 info->MCR |= UART_MCR_AFE;
590 } else {
591 status = inb(info->ioaddr + UART_MSR);
592 if (info->tty->hw_stopped) {
593 if (status & UART_MSR_CTS) {
594 info->tty->hw_stopped = 0;
595 if (info->type != PORT_16550A &&
596 !info->board->chip_flag) {
597 outb(info->IER & ~UART_IER_THRI,
598 info->ioaddr +
599 UART_IER);
600 info->IER |= UART_IER_THRI;
601 outb(info->IER, info->ioaddr +
602 UART_IER);
603 }
604 tty_wakeup(info->tty);
605 }
606 } else {
607 if (!(status & UART_MSR_CTS)) {
608 info->tty->hw_stopped = 1;
609 if ((info->type != PORT_16550A) &&
610 (!info->board->chip_flag)) {
611 info->IER &= ~UART_IER_THRI;
612 outb(info->IER, info->ioaddr +
613 UART_IER);
614 }
615 }
616 }
617 }
618 } else {
619 info->flags &= ~ASYNC_CTS_FLOW;
620 }
621 outb(info->MCR, info->ioaddr + UART_MCR);
622 if (cflag & CLOCAL) {
623 info->flags &= ~ASYNC_CHECK_CD;
624 } else {
625 info->flags |= ASYNC_CHECK_CD;
626 info->IER |= UART_IER_MSI;
627 }
628 outb(info->IER, info->ioaddr + UART_IER);
629
630 /*
631 * Set up parity check flag
632 */
633 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
634 if (I_INPCK(info->tty))
635 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
636 if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
637 info->read_status_mask |= UART_LSR_BI;
638
639 info->ignore_status_mask = 0;
640
641 if (I_IGNBRK(info->tty)) {
642 info->ignore_status_mask |= UART_LSR_BI;
643 info->read_status_mask |= UART_LSR_BI;
644 /*
645 * If we're ignore parity and break indicators, ignore
646 * overruns too. (For real raw support).
647 */
648 if (I_IGNPAR(info->tty)) {
649 info->ignore_status_mask |=
650 UART_LSR_OE |
651 UART_LSR_PE |
652 UART_LSR_FE;
653 info->read_status_mask |=
654 UART_LSR_OE |
655 UART_LSR_PE |
656 UART_LSR_FE;
657 }
658 }
659 if (info->board->chip_flag) {
660 SET_MOXA_MUST_XON1_VALUE(info->ioaddr, START_CHAR(info->tty));
661 SET_MOXA_MUST_XOFF1_VALUE(info->ioaddr, STOP_CHAR(info->tty));
662 if (I_IXON(info->tty)) {
663 ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
664 } else {
665 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
666 }
667 if (I_IXOFF(info->tty)) {
668 ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
669 } else {
670 DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
671 }
672 }
673
674
675 outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
676 outb(cval, info->ioaddr + UART_LCR);
677
678 return ret;
679 }
680
681 static void mxser_check_modem_status(struct mxser_port *port, int status)
682 {
683 /* update input line counters */
684 if (status & UART_MSR_TERI)
685 port->icount.rng++;
686 if (status & UART_MSR_DDSR)
687 port->icount.dsr++;
688 if (status & UART_MSR_DDCD)
689 port->icount.dcd++;
690 if (status & UART_MSR_DCTS)
691 port->icount.cts++;
692 port->mon_data.modem_status = status;
693 wake_up_interruptible(&port->delta_msr_wait);
694
695 if ((port->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
696 if (status & UART_MSR_DCD)
697 wake_up_interruptible(&port->open_wait);
698 }
699
700 if (port->flags & ASYNC_CTS_FLOW) {
701 if (port->tty->hw_stopped) {
702 if (status & UART_MSR_CTS) {
703 port->tty->hw_stopped = 0;
704
705 if ((port->type != PORT_16550A) &&
706 (!port->board->chip_flag)) {
707 outb(port->IER & ~UART_IER_THRI,
708 port->ioaddr + UART_IER);
709 port->IER |= UART_IER_THRI;
710 outb(port->IER, port->ioaddr +
711 UART_IER);
712 }
713 tty_wakeup(port->tty);
714 }
715 } else {
716 if (!(status & UART_MSR_CTS)) {
717 port->tty->hw_stopped = 1;
718 if (port->type != PORT_16550A &&
719 !port->board->chip_flag) {
720 port->IER &= ~UART_IER_THRI;
721 outb(port->IER, port->ioaddr +
722 UART_IER);
723 }
724 }
725 }
726 }
727 }
728
729 static int mxser_startup(struct mxser_port *info)
730 {
731 unsigned long page;
732 unsigned long flags;
733
734 page = __get_free_page(GFP_KERNEL);
735 if (!page)
736 return -ENOMEM;
737
738 spin_lock_irqsave(&info->slock, flags);
739
740 if (info->flags & ASYNC_INITIALIZED) {
741 free_page(page);
742 spin_unlock_irqrestore(&info->slock, flags);
743 return 0;
744 }
745
746 if (!info->ioaddr || !info->type) {
747 if (info->tty)
748 set_bit(TTY_IO_ERROR, &info->tty->flags);
749 free_page(page);
750 spin_unlock_irqrestore(&info->slock, flags);
751 return 0;
752 }
753 if (info->xmit_buf)
754 free_page(page);
755 else
756 info->xmit_buf = (unsigned char *) page;
757
758 /*
759 * Clear the FIFO buffers and disable them
760 * (they will be reenabled in mxser_change_speed())
761 */
762 if (info->board->chip_flag)
763 outb((UART_FCR_CLEAR_RCVR |
764 UART_FCR_CLEAR_XMIT |
765 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
766 else
767 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
768 info->ioaddr + UART_FCR);
769
770 /*
771 * At this point there's no way the LSR could still be 0xFF;
772 * if it is, then bail out, because there's likely no UART
773 * here.
774 */
775 if (inb(info->ioaddr + UART_LSR) == 0xff) {
776 spin_unlock_irqrestore(&info->slock, flags);
777 if (capable(CAP_SYS_ADMIN)) {
778 if (info->tty)
779 set_bit(TTY_IO_ERROR, &info->tty->flags);
780 return 0;
781 } else
782 return -ENODEV;
783 }
784
785 /*
786 * Clear the interrupt registers.
787 */
788 (void) inb(info->ioaddr + UART_LSR);
789 (void) inb(info->ioaddr + UART_RX);
790 (void) inb(info->ioaddr + UART_IIR);
791 (void) inb(info->ioaddr + UART_MSR);
792
793 /*
794 * Now, initialize the UART
795 */
796 outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
797 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
798 outb(info->MCR, info->ioaddr + UART_MCR);
799
800 /*
801 * Finally, enable interrupts
802 */
803 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
804
805 if (info->board->chip_flag)
806 info->IER |= MOXA_MUST_IER_EGDAI;
807 outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
808
809 /*
810 * And clear the interrupt registers again for luck.
811 */
812 (void) inb(info->ioaddr + UART_LSR);
813 (void) inb(info->ioaddr + UART_RX);
814 (void) inb(info->ioaddr + UART_IIR);
815 (void) inb(info->ioaddr + UART_MSR);
816
817 if (info->tty)
818 clear_bit(TTY_IO_ERROR, &info->tty->flags);
819 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
820
821 /*
822 * and set the speed of the serial port
823 */
824 mxser_change_speed(info, NULL);
825 info->flags |= ASYNC_INITIALIZED;
826 spin_unlock_irqrestore(&info->slock, flags);
827
828 return 0;
829 }
830
831 /*
832 * This routine will shutdown a serial port; interrupts maybe disabled, and
833 * DTR is dropped if the hangup on close termio flag is on.
834 */
835 static void mxser_shutdown(struct mxser_port *info)
836 {
837 unsigned long flags;
838
839 if (!(info->flags & ASYNC_INITIALIZED))
840 return;
841
842 spin_lock_irqsave(&info->slock, flags);
843
844 /*
845 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
846 * here so the queue might never be waken up
847 */
848 wake_up_interruptible(&info->delta_msr_wait);
849
850 /*
851 * Free the IRQ, if necessary
852 */
853 if (info->xmit_buf) {
854 free_page((unsigned long) info->xmit_buf);
855 info->xmit_buf = NULL;
856 }
857
858 info->IER = 0;
859 outb(0x00, info->ioaddr + UART_IER);
860
861 if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
862 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
863 outb(info->MCR, info->ioaddr + UART_MCR);
864
865 /* clear Rx/Tx FIFO's */
866 if (info->board->chip_flag)
867 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
868 MOXA_MUST_FCR_GDA_MODE_ENABLE,
869 info->ioaddr + UART_FCR);
870 else
871 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
872 info->ioaddr + UART_FCR);
873
874 /* read data port to reset things */
875 (void) inb(info->ioaddr + UART_RX);
876
877 if (info->tty)
878 set_bit(TTY_IO_ERROR, &info->tty->flags);
879
880 info->flags &= ~ASYNC_INITIALIZED;
881
882 if (info->board->chip_flag)
883 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
884
885 spin_unlock_irqrestore(&info->slock, flags);
886 }
887
888 /*
889 * This routine is called whenever a serial port is opened. It
890 * enables interrupts for a serial port, linking in its async structure into
891 * the IRQ chain. It also performs the serial-specific
892 * initialization for the tty structure.
893 */
894 static int mxser_open(struct tty_struct *tty, struct file *filp)
895 {
896 struct mxser_port *info;
897 unsigned long flags;
898 int retval, line;
899
900 line = tty->index;
901 if (line == MXSER_PORTS)
902 return 0;
903 if (line < 0 || line > MXSER_PORTS)
904 return -ENODEV;
905 info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
906 if (!info->ioaddr)
907 return -ENODEV;
908
909 tty->driver_data = info;
910 info->tty = tty;
911 /*
912 * Start up serial port
913 */
914 spin_lock_irqsave(&info->slock, flags);
915 info->count++;
916 spin_unlock_irqrestore(&info->slock, flags);
917 retval = mxser_startup(info);
918 if (retval)
919 return retval;
920
921 retval = mxser_block_til_ready(tty, filp, info);
922 if (retval)
923 return retval;
924
925 /* unmark here for very high baud rate (ex. 921600 bps) used */
926 tty->low_latency = 1;
927 return 0;
928 }
929
930 /*
931 * This routine is called when the serial port gets closed. First, we
932 * wait for the last remaining data to be sent. Then, we unlink its
933 * async structure from the interrupt chain if necessary, and we free
934 * that IRQ if nothing is left in the chain.
935 */
936 static void mxser_close(struct tty_struct *tty, struct file *filp)
937 {
938 struct mxser_port *info = tty->driver_data;
939
940 unsigned long timeout;
941 unsigned long flags;
942
943 if (tty->index == MXSER_PORTS)
944 return;
945 if (!info)
946 return;
947
948 spin_lock_irqsave(&info->slock, flags);
949
950 if (tty_hung_up_p(filp)) {
951 spin_unlock_irqrestore(&info->slock, flags);
952 return;
953 }
954 if ((tty->count == 1) && (info->count != 1)) {
955 /*
956 * Uh, oh. tty->count is 1, which means that the tty
957 * structure will be freed. Info->count should always
958 * be one in these conditions. If it's greater than
959 * one, we've got real problems, since it means the
960 * serial port won't be shutdown.
961 */
962 printk(KERN_ERR "mxser_close: bad serial port count; "
963 "tty->count is 1, info->count is %d\n", info->count);
964 info->count = 1;
965 }
966 if (--info->count < 0) {
967 printk(KERN_ERR "mxser_close: bad serial port count for "
968 "ttys%d: %d\n", tty->index, info->count);
969 info->count = 0;
970 }
971 if (info->count) {
972 spin_unlock_irqrestore(&info->slock, flags);
973 return;
974 }
975 info->flags |= ASYNC_CLOSING;
976 spin_unlock_irqrestore(&info->slock, flags);
977 /*
978 * Save the termios structure, since this port may have
979 * separate termios for callout and dialin.
980 */
981 if (info->flags & ASYNC_NORMAL_ACTIVE)
982 info->normal_termios = *tty->termios;
983 /*
984 * Now we wait for the transmit buffer to clear; and we notify
985 * the line discipline to only process XON/XOFF characters.
986 */
987 tty->closing = 1;
988 if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
989 tty_wait_until_sent(tty, info->closing_wait);
990 /*
991 * At this point we stop accepting input. To do this, we
992 * disable the receive line status interrupts, and tell the
993 * interrupt driver to stop checking the data ready bit in the
994 * line status register.
995 */
996 info->IER &= ~UART_IER_RLSI;
997 if (info->board->chip_flag)
998 info->IER &= ~MOXA_MUST_RECV_ISR;
999
1000 if (info->flags & ASYNC_INITIALIZED) {
1001 outb(info->IER, info->ioaddr + UART_IER);
1002 /*
1003 * Before we drop DTR, make sure the UART transmitter
1004 * has completely drained; this is especially
1005 * important if there is a transmit FIFO!
1006 */
1007 timeout = jiffies + HZ;
1008 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1009 schedule_timeout_interruptible(5);
1010 if (time_after(jiffies, timeout))
1011 break;
1012 }
1013 }
1014 mxser_shutdown(info);
1015
1016 if (tty->driver->flush_buffer)
1017 tty->driver->flush_buffer(tty);
1018
1019 tty_ldisc_flush(tty);
1020
1021 tty->closing = 0;
1022 info->event = 0;
1023 info->tty = NULL;
1024 if (info->blocked_open) {
1025 if (info->close_delay)
1026 schedule_timeout_interruptible(info->close_delay);
1027 wake_up_interruptible(&info->open_wait);
1028 }
1029
1030 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1031 }
1032
1033 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1034 {
1035 int c, total = 0;
1036 struct mxser_port *info = tty->driver_data;
1037 unsigned long flags;
1038
1039 if (!info->xmit_buf)
1040 return 0;
1041
1042 while (1) {
1043 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1044 SERIAL_XMIT_SIZE - info->xmit_head));
1045 if (c <= 0)
1046 break;
1047
1048 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1049 spin_lock_irqsave(&info->slock, flags);
1050 info->xmit_head = (info->xmit_head + c) &
1051 (SERIAL_XMIT_SIZE - 1);
1052 info->xmit_cnt += c;
1053 spin_unlock_irqrestore(&info->slock, flags);
1054
1055 buf += c;
1056 count -= c;
1057 total += c;
1058 }
1059
1060 if (info->xmit_cnt && !tty->stopped) {
1061 if (!tty->hw_stopped ||
1062 (info->type == PORT_16550A) ||
1063 (info->board->chip_flag)) {
1064 spin_lock_irqsave(&info->slock, flags);
1065 outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1066 UART_IER);
1067 info->IER |= UART_IER_THRI;
1068 outb(info->IER, info->ioaddr + UART_IER);
1069 spin_unlock_irqrestore(&info->slock, flags);
1070 }
1071 }
1072 return total;
1073 }
1074
1075 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1076 {
1077 struct mxser_port *info = tty->driver_data;
1078 unsigned long flags;
1079
1080 if (!info->xmit_buf)
1081 return;
1082
1083 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1084 return;
1085
1086 spin_lock_irqsave(&info->slock, flags);
1087 info->xmit_buf[info->xmit_head++] = ch;
1088 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1089 info->xmit_cnt++;
1090 spin_unlock_irqrestore(&info->slock, flags);
1091 if (!tty->stopped) {
1092 if (!tty->hw_stopped ||
1093 (info->type == PORT_16550A) ||
1094 info->board->chip_flag) {
1095 spin_lock_irqsave(&info->slock, flags);
1096 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1097 info->IER |= UART_IER_THRI;
1098 outb(info->IER, info->ioaddr + UART_IER);
1099 spin_unlock_irqrestore(&info->slock, flags);
1100 }
1101 }
1102 }
1103
1104
1105 static void mxser_flush_chars(struct tty_struct *tty)
1106 {
1107 struct mxser_port *info = tty->driver_data;
1108 unsigned long flags;
1109
1110 if (info->xmit_cnt <= 0 ||
1111 tty->stopped ||
1112 !info->xmit_buf ||
1113 (tty->hw_stopped &&
1114 (info->type != PORT_16550A) &&
1115 (!info->board->chip_flag)
1116 ))
1117 return;
1118
1119 spin_lock_irqsave(&info->slock, flags);
1120
1121 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1122 info->IER |= UART_IER_THRI;
1123 outb(info->IER, info->ioaddr + UART_IER);
1124
1125 spin_unlock_irqrestore(&info->slock, flags);
1126 }
1127
1128 static int mxser_write_room(struct tty_struct *tty)
1129 {
1130 struct mxser_port *info = tty->driver_data;
1131 int ret;
1132
1133 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1134 if (ret < 0)
1135 ret = 0;
1136 return ret;
1137 }
1138
1139 static int mxser_chars_in_buffer(struct tty_struct *tty)
1140 {
1141 struct mxser_port *info = tty->driver_data;
1142 return info->xmit_cnt;
1143 }
1144
1145 static void mxser_flush_buffer(struct tty_struct *tty)
1146 {
1147 struct mxser_port *info = tty->driver_data;
1148 char fcr;
1149 unsigned long flags;
1150
1151
1152 spin_lock_irqsave(&info->slock, flags);
1153 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1154
1155 fcr = inb(info->ioaddr + UART_FCR);
1156 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1157 info->ioaddr + UART_FCR);
1158 outb(fcr, info->ioaddr + UART_FCR);
1159
1160 spin_unlock_irqrestore(&info->slock, flags);
1161
1162 tty_wakeup(tty);
1163 }
1164
1165 /*
1166 * ------------------------------------------------------------
1167 * friends of mxser_ioctl()
1168 * ------------------------------------------------------------
1169 */
1170 static int mxser_get_serial_info(struct mxser_port *info,
1171 struct serial_struct __user *retinfo)
1172 {
1173 struct serial_struct tmp = {
1174 .type = info->type,
1175 .line = info->tty->index,
1176 .port = info->ioaddr,
1177 .irq = info->board->irq,
1178 .flags = info->flags,
1179 .baud_base = info->baud_base,
1180 .close_delay = info->close_delay,
1181 .closing_wait = info->closing_wait,
1182 .custom_divisor = info->custom_divisor,
1183 .hub6 = 0
1184 };
1185 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1186 return -EFAULT;
1187 return 0;
1188 }
1189
1190 static int mxser_set_serial_info(struct mxser_port *info,
1191 struct serial_struct __user *new_info)
1192 {
1193 struct serial_struct new_serial;
1194 speed_t baud;
1195 unsigned long sl_flags;
1196 unsigned int flags;
1197 int retval = 0;
1198
1199 if (!new_info || !info->ioaddr)
1200 return -ENODEV;
1201 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1202 return -EFAULT;
1203
1204 if (new_serial.irq != info->board->irq ||
1205 new_serial.port != info->ioaddr)
1206 return -EINVAL;
1207
1208 flags = info->flags & ASYNC_SPD_MASK;
1209
1210 if (!capable(CAP_SYS_ADMIN)) {
1211 if ((new_serial.baud_base != info->baud_base) ||
1212 (new_serial.close_delay != info->close_delay) ||
1213 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
1214 return -EPERM;
1215 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
1216 (new_serial.flags & ASYNC_USR_MASK));
1217 } else {
1218 /*
1219 * OK, past this point, all the error checking has been done.
1220 * At this point, we start making changes.....
1221 */
1222 info->flags = ((info->flags & ~ASYNC_FLAGS) |
1223 (new_serial.flags & ASYNC_FLAGS));
1224 info->close_delay = new_serial.close_delay * HZ / 100;
1225 info->closing_wait = new_serial.closing_wait * HZ / 100;
1226 info->tty->low_latency =
1227 (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1228 info->tty->low_latency = 0;
1229 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
1230 (new_serial.baud_base != info->baud_base ||
1231 new_serial.custom_divisor !=
1232 info->custom_divisor)) {
1233 baud = new_serial.baud_base / new_serial.custom_divisor;
1234 tty_encode_baud_rate(info->tty, baud, baud);
1235 }
1236 }
1237
1238 info->type = new_serial.type;
1239
1240 process_txrx_fifo(info);
1241
1242 if (info->flags & ASYNC_INITIALIZED) {
1243 if (flags != (info->flags & ASYNC_SPD_MASK)) {
1244 spin_lock_irqsave(&info->slock, sl_flags);
1245 mxser_change_speed(info, NULL);
1246 spin_unlock_irqrestore(&info->slock, sl_flags);
1247 }
1248 } else
1249 retval = mxser_startup(info);
1250
1251 return retval;
1252 }
1253
1254 /*
1255 * mxser_get_lsr_info - get line status register info
1256 *
1257 * Purpose: Let user call ioctl() to get info when the UART physically
1258 * is emptied. On bus types like RS485, the transmitter must
1259 * release the bus after transmitting. This must be done when
1260 * the transmit shift register is empty, not be done when the
1261 * transmit holding register is empty. This functionality
1262 * allows an RS485 driver to be written in user space.
1263 */
1264 static int mxser_get_lsr_info(struct mxser_port *info,
1265 unsigned int __user *value)
1266 {
1267 unsigned char status;
1268 unsigned int result;
1269 unsigned long flags;
1270
1271 spin_lock_irqsave(&info->slock, flags);
1272 status = inb(info->ioaddr + UART_LSR);
1273 spin_unlock_irqrestore(&info->slock, flags);
1274 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1275 return put_user(result, value);
1276 }
1277
1278 /*
1279 * This routine sends a break character out the serial port.
1280 */
1281 static void mxser_send_break(struct mxser_port *info, int duration)
1282 {
1283 unsigned long flags;
1284
1285 if (!info->ioaddr)
1286 return;
1287 set_current_state(TASK_INTERRUPTIBLE);
1288 spin_lock_irqsave(&info->slock, flags);
1289 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
1290 info->ioaddr + UART_LCR);
1291 spin_unlock_irqrestore(&info->slock, flags);
1292 schedule_timeout(duration);
1293 spin_lock_irqsave(&info->slock, flags);
1294 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
1295 info->ioaddr + UART_LCR);
1296 spin_unlock_irqrestore(&info->slock, flags);
1297 }
1298
1299 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
1300 {
1301 struct mxser_port *info = tty->driver_data;
1302 unsigned char control, status;
1303 unsigned long flags;
1304
1305
1306 if (tty->index == MXSER_PORTS)
1307 return -ENOIOCTLCMD;
1308 if (test_bit(TTY_IO_ERROR, &tty->flags))
1309 return -EIO;
1310
1311 control = info->MCR;
1312
1313 spin_lock_irqsave(&info->slock, flags);
1314 status = inb(info->ioaddr + UART_MSR);
1315 if (status & UART_MSR_ANY_DELTA)
1316 mxser_check_modem_status(info, status);
1317 spin_unlock_irqrestore(&info->slock, flags);
1318 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1319 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1320 ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1321 ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1322 ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1323 ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1324 }
1325
1326 static int mxser_tiocmset(struct tty_struct *tty, struct file *file,
1327 unsigned int set, unsigned int clear)
1328 {
1329 struct mxser_port *info = tty->driver_data;
1330 unsigned long flags;
1331
1332
1333 if (tty->index == MXSER_PORTS)
1334 return -ENOIOCTLCMD;
1335 if (test_bit(TTY_IO_ERROR, &tty->flags))
1336 return -EIO;
1337
1338 spin_lock_irqsave(&info->slock, flags);
1339
1340 if (set & TIOCM_RTS)
1341 info->MCR |= UART_MCR_RTS;
1342 if (set & TIOCM_DTR)
1343 info->MCR |= UART_MCR_DTR;
1344
1345 if (clear & TIOCM_RTS)
1346 info->MCR &= ~UART_MCR_RTS;
1347 if (clear & TIOCM_DTR)
1348 info->MCR &= ~UART_MCR_DTR;
1349
1350 outb(info->MCR, info->ioaddr + UART_MCR);
1351 spin_unlock_irqrestore(&info->slock, flags);
1352 return 0;
1353 }
1354
1355 static int __init mxser_program_mode(int port)
1356 {
1357 int id, i, j, n;
1358
1359 outb(0, port);
1360 outb(0, port);
1361 outb(0, port);
1362 (void)inb(port);
1363 (void)inb(port);
1364 outb(0, port);
1365 (void)inb(port);
1366
1367 id = inb(port + 1) & 0x1F;
1368 if ((id != C168_ASIC_ID) &&
1369 (id != C104_ASIC_ID) &&
1370 (id != C102_ASIC_ID) &&
1371 (id != CI132_ASIC_ID) &&
1372 (id != CI134_ASIC_ID) &&
1373 (id != CI104J_ASIC_ID))
1374 return -1;
1375 for (i = 0, j = 0; i < 4; i++) {
1376 n = inb(port + 2);
1377 if (n == 'M') {
1378 j = 1;
1379 } else if ((j == 1) && (n == 1)) {
1380 j = 2;
1381 break;
1382 } else
1383 j = 0;
1384 }
1385 if (j != 2)
1386 id = -2;
1387 return id;
1388 }
1389
1390 static void __init mxser_normal_mode(int port)
1391 {
1392 int i, n;
1393
1394 outb(0xA5, port + 1);
1395 outb(0x80, port + 3);
1396 outb(12, port + 0); /* 9600 bps */
1397 outb(0, port + 1);
1398 outb(0x03, port + 3); /* 8 data bits */
1399 outb(0x13, port + 4); /* loop back mode */
1400 for (i = 0; i < 16; i++) {
1401 n = inb(port + 5);
1402 if ((n & 0x61) == 0x60)
1403 break;
1404 if ((n & 1) == 1)
1405 (void)inb(port);
1406 }
1407 outb(0x00, port + 4);
1408 }
1409
1410 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1411 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1412 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1413 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1414 #define EN_CCMD 0x000 /* Chip's command register */
1415 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1416 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1417 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1418 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1419 #define EN0_DCFG 0x00E /* Data configuration reg WR */
1420 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1421 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1422 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
1423 static int __init mxser_read_register(int port, unsigned short *regs)
1424 {
1425 int i, k, value, id;
1426 unsigned int j;
1427
1428 id = mxser_program_mode(port);
1429 if (id < 0)
1430 return id;
1431 for (i = 0; i < 14; i++) {
1432 k = (i & 0x3F) | 0x180;
1433 for (j = 0x100; j > 0; j >>= 1) {
1434 outb(CHIP_CS, port);
1435 if (k & j) {
1436 outb(CHIP_CS | CHIP_DO, port);
1437 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
1438 } else {
1439 outb(CHIP_CS, port);
1440 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
1441 }
1442 }
1443 (void)inb(port);
1444 value = 0;
1445 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1446 outb(CHIP_CS, port);
1447 outb(CHIP_CS | CHIP_SK, port);
1448 if (inb(port) & CHIP_DI)
1449 value |= j;
1450 }
1451 regs[i] = value;
1452 outb(0, port);
1453 }
1454 mxser_normal_mode(port);
1455 return id;
1456 }
1457
1458 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1459 {
1460 struct mxser_port *port;
1461 int result, status;
1462 unsigned int i, j;
1463
1464 switch (cmd) {
1465 case MOXA_GET_MAJOR:
1466 return put_user(ttymajor, (int __user *)argp);
1467
1468 case MOXA_CHKPORTENABLE:
1469 result = 0;
1470
1471 for (i = 0; i < MXSER_BOARDS; i++)
1472 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1473 if (mxser_boards[i].ports[j].ioaddr)
1474 result |= (1 << i);
1475
1476 return put_user(result, (unsigned long __user *)argp);
1477 case MOXA_GETDATACOUNT:
1478 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1479 return -EFAULT;
1480 return 0;
1481 case MOXA_GETMSTATUS:
1482 for (i = 0; i < MXSER_BOARDS; i++)
1483 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1484 port = &mxser_boards[i].ports[j];
1485
1486 GMStatus[i].ri = 0;
1487 if (!port->ioaddr) {
1488 GMStatus[i].dcd = 0;
1489 GMStatus[i].dsr = 0;
1490 GMStatus[i].cts = 0;
1491 continue;
1492 }
1493
1494 if (!port->tty || !port->tty->termios)
1495 GMStatus[i].cflag =
1496 port->normal_termios.c_cflag;
1497 else
1498 GMStatus[i].cflag =
1499 port->tty->termios->c_cflag;
1500
1501 status = inb(port->ioaddr + UART_MSR);
1502 if (status & 0x80 /*UART_MSR_DCD */ )
1503 GMStatus[i].dcd = 1;
1504 else
1505 GMStatus[i].dcd = 0;
1506
1507 if (status & 0x20 /*UART_MSR_DSR */ )
1508 GMStatus[i].dsr = 1;
1509 else
1510 GMStatus[i].dsr = 0;
1511
1512
1513 if (status & 0x10 /*UART_MSR_CTS */ )
1514 GMStatus[i].cts = 1;
1515 else
1516 GMStatus[i].cts = 0;
1517 }
1518 if (copy_to_user(argp, GMStatus,
1519 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1520 return -EFAULT;
1521 return 0;
1522 case MOXA_ASPP_MON_EXT: {
1523 int p, shiftbit;
1524 unsigned long opmode;
1525 unsigned cflag, iflag;
1526
1527 for (i = 0; i < MXSER_BOARDS; i++)
1528 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1529 port = &mxser_boards[i].ports[j];
1530 if (!port->ioaddr)
1531 continue;
1532
1533 status = mxser_get_msr(port->ioaddr, 0, i);
1534
1535 if (status & UART_MSR_TERI)
1536 port->icount.rng++;
1537 if (status & UART_MSR_DDSR)
1538 port->icount.dsr++;
1539 if (status & UART_MSR_DDCD)
1540 port->icount.dcd++;
1541 if (status & UART_MSR_DCTS)
1542 port->icount.cts++;
1543
1544 port->mon_data.modem_status = status;
1545 mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt;
1546 mon_data_ext.tx_cnt[i] = port->mon_data.txcnt;
1547 mon_data_ext.up_rxcnt[i] =
1548 port->mon_data.up_rxcnt;
1549 mon_data_ext.up_txcnt[i] =
1550 port->mon_data.up_txcnt;
1551 mon_data_ext.modem_status[i] =
1552 port->mon_data.modem_status;
1553 mon_data_ext.baudrate[i] =
1554 tty_get_baud_rate(port->tty);
1555
1556 if (!port->tty || !port->tty->termios) {
1557 cflag = port->normal_termios.c_cflag;
1558 iflag = port->normal_termios.c_iflag;
1559 } else {
1560 cflag = port->tty->termios->c_cflag;
1561 iflag = port->tty->termios->c_iflag;
1562 }
1563
1564 mon_data_ext.databits[i] = cflag & CSIZE;
1565
1566 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1567
1568 mon_data_ext.parity[i] =
1569 cflag & (PARENB | PARODD | CMSPAR);
1570
1571 mon_data_ext.flowctrl[i] = 0x00;
1572
1573 if (cflag & CRTSCTS)
1574 mon_data_ext.flowctrl[i] |= 0x03;
1575
1576 if (iflag & (IXON | IXOFF))
1577 mon_data_ext.flowctrl[i] |= 0x0C;
1578
1579 if (port->type == PORT_16550A)
1580 mon_data_ext.fifo[i] = 1;
1581 else
1582 mon_data_ext.fifo[i] = 0;
1583
1584 p = i % 4;
1585 shiftbit = p * 2;
1586 opmode = inb(port->opmode_ioaddr) >> shiftbit;
1587 opmode &= OP_MODE_MASK;
1588
1589 mon_data_ext.iftype[i] = opmode;
1590
1591 }
1592 if (copy_to_user(argp, &mon_data_ext,
1593 sizeof(mon_data_ext)))
1594 return -EFAULT;
1595
1596 return 0;
1597
1598 } default:
1599 return -ENOIOCTLCMD;
1600 }
1601 return 0;
1602 }
1603
1604 static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
1605 struct async_icount *cprev)
1606 {
1607 struct async_icount cnow;
1608 unsigned long flags;
1609 int ret;
1610
1611 spin_lock_irqsave(&info->slock, flags);
1612 cnow = info->icount; /* atomic copy */
1613 spin_unlock_irqrestore(&info->slock, flags);
1614
1615 ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1616 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1617 ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
1618 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
1619
1620 *cprev = cnow;
1621
1622 return ret;
1623 }
1624
1625 static int mxser_ioctl(struct tty_struct *tty, struct file *file,
1626 unsigned int cmd, unsigned long arg)
1627 {
1628 struct mxser_port *info = tty->driver_data;
1629 struct async_icount cnow;
1630 struct serial_icounter_struct __user *p_cuser;
1631 unsigned long flags;
1632 void __user *argp = (void __user *)arg;
1633 int retval;
1634
1635 if (tty->index == MXSER_PORTS)
1636 return mxser_ioctl_special(cmd, argp);
1637
1638 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1639 int p;
1640 unsigned long opmode;
1641 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1642 int shiftbit;
1643 unsigned char val, mask;
1644
1645 p = tty->index % 4;
1646 if (cmd == MOXA_SET_OP_MODE) {
1647 if (get_user(opmode, (int __user *) argp))
1648 return -EFAULT;
1649 if (opmode != RS232_MODE &&
1650 opmode != RS485_2WIRE_MODE &&
1651 opmode != RS422_MODE &&
1652 opmode != RS485_4WIRE_MODE)
1653 return -EFAULT;
1654 mask = ModeMask[p];
1655 shiftbit = p * 2;
1656 val = inb(info->opmode_ioaddr);
1657 val &= mask;
1658 val |= (opmode << shiftbit);
1659 outb(val, info->opmode_ioaddr);
1660 } else {
1661 shiftbit = p * 2;
1662 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1663 opmode &= OP_MODE_MASK;
1664 if (put_user(opmode, (int __user *)argp))
1665 return -EFAULT;
1666 }
1667 return 0;
1668 }
1669
1670 if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT &&
1671 test_bit(TTY_IO_ERROR, &tty->flags))
1672 return -EIO;
1673
1674 switch (cmd) {
1675 case TCSBRK: /* SVID version: non-zero arg --> no break */
1676 retval = tty_check_change(tty);
1677 if (retval)
1678 return retval;
1679 tty_wait_until_sent(tty, 0);
1680 if (!arg)
1681 mxser_send_break(info, HZ / 4); /* 1/4 second */
1682 return 0;
1683 case TCSBRKP: /* support for POSIX tcsendbreak() */
1684 retval = tty_check_change(tty);
1685 if (retval)
1686 return retval;
1687 tty_wait_until_sent(tty, 0);
1688 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1689 return 0;
1690 case TIOCGSOFTCAR:
1691 return put_user(!!C_CLOCAL(tty), (unsigned long __user *)argp);
1692 case TIOCSSOFTCAR:
1693 if (get_user(arg, (unsigned long __user *)argp))
1694 return -EFAULT;
1695 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1696 return 0;
1697 case TIOCGSERIAL:
1698 return mxser_get_serial_info(info, argp);
1699 case TIOCSSERIAL:
1700 return mxser_set_serial_info(info, argp);
1701 case TIOCSERGETLSR: /* Get line status register */
1702 return mxser_get_lsr_info(info, argp);
1703 /*
1704 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1705 * - mask passed in arg for lines of interest
1706 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1707 * Caller should use TIOCGICOUNT to see which one it was
1708 */
1709 case TIOCMIWAIT:
1710 spin_lock_irqsave(&info->slock, flags);
1711 cnow = info->icount; /* note the counters on entry */
1712 spin_unlock_irqrestore(&info->slock, flags);
1713
1714 return wait_event_interruptible(info->delta_msr_wait,
1715 mxser_cflags_changed(info, arg, &cnow));
1716 /*
1717 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1718 * Return: write counters to the user passed counter struct
1719 * NB: both 1->0 and 0->1 transitions are counted except for
1720 * RI where only 0->1 is counted.
1721 */
1722 case TIOCGICOUNT:
1723 spin_lock_irqsave(&info->slock, flags);
1724 cnow = info->icount;
1725 spin_unlock_irqrestore(&info->slock, flags);
1726 p_cuser = argp;
1727 if (put_user(cnow.frame, &p_cuser->frame))
1728 return -EFAULT;
1729 if (put_user(cnow.brk, &p_cuser->brk))
1730 return -EFAULT;
1731 if (put_user(cnow.overrun, &p_cuser->overrun))
1732 return -EFAULT;
1733 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1734 return -EFAULT;
1735 if (put_user(cnow.parity, &p_cuser->parity))
1736 return -EFAULT;
1737 if (put_user(cnow.rx, &p_cuser->rx))
1738 return -EFAULT;
1739 if (put_user(cnow.tx, &p_cuser->tx))
1740 return -EFAULT;
1741 put_user(cnow.cts, &p_cuser->cts);
1742 put_user(cnow.dsr, &p_cuser->dsr);
1743 put_user(cnow.rng, &p_cuser->rng);
1744 put_user(cnow.dcd, &p_cuser->dcd);
1745 return 0;
1746 case MOXA_HighSpeedOn:
1747 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1748 case MOXA_SDS_RSTICOUNTER:
1749 info->mon_data.rxcnt = 0;
1750 info->mon_data.txcnt = 0;
1751 return 0;
1752
1753 case MOXA_ASPP_OQUEUE:{
1754 int len, lsr;
1755
1756 len = mxser_chars_in_buffer(tty);
1757
1758 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
1759
1760 len += (lsr ? 0 : 1);
1761
1762 return put_user(len, (int __user *)argp);
1763 }
1764 case MOXA_ASPP_MON: {
1765 int mcr, status;
1766
1767 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1768 mxser_check_modem_status(info, status);
1769
1770 mcr = inb(info->ioaddr + UART_MCR);
1771 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1772 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1773 else
1774 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1775
1776 if (mcr & MOXA_MUST_MCR_TX_XON)
1777 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1778 else
1779 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1780
1781 if (info->tty->hw_stopped)
1782 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1783 else
1784 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1785
1786 if (copy_to_user(argp, &info->mon_data,
1787 sizeof(struct mxser_mon)))
1788 return -EFAULT;
1789
1790 return 0;
1791 }
1792 case MOXA_ASPP_LSTATUS: {
1793 if (put_user(info->err_shadow, (unsigned char __user *)argp))
1794 return -EFAULT;
1795
1796 info->err_shadow = 0;
1797 return 0;
1798 }
1799 case MOXA_SET_BAUD_METHOD: {
1800 int method;
1801
1802 if (get_user(method, (int __user *)argp))
1803 return -EFAULT;
1804 mxser_set_baud_method[tty->index] = method;
1805 return put_user(method, (int __user *)argp);
1806 }
1807 default:
1808 return -ENOIOCTLCMD;
1809 }
1810 return 0;
1811 }
1812
1813 static void mxser_stoprx(struct tty_struct *tty)
1814 {
1815 struct mxser_port *info = tty->driver_data;
1816
1817 info->ldisc_stop_rx = 1;
1818 if (I_IXOFF(tty)) {
1819 if (info->board->chip_flag) {
1820 info->IER &= ~MOXA_MUST_RECV_ISR;
1821 outb(info->IER, info->ioaddr + UART_IER);
1822 } else {
1823 info->x_char = STOP_CHAR(tty);
1824 outb(0, info->ioaddr + UART_IER);
1825 info->IER |= UART_IER_THRI;
1826 outb(info->IER, info->ioaddr + UART_IER);
1827 }
1828 }
1829
1830 if (info->tty->termios->c_cflag & CRTSCTS) {
1831 info->MCR &= ~UART_MCR_RTS;
1832 outb(info->MCR, info->ioaddr + UART_MCR);
1833 }
1834 }
1835
1836 /*
1837 * This routine is called by the upper-layer tty layer to signal that
1838 * incoming characters should be throttled.
1839 */
1840 static void mxser_throttle(struct tty_struct *tty)
1841 {
1842 mxser_stoprx(tty);
1843 }
1844
1845 static void mxser_unthrottle(struct tty_struct *tty)
1846 {
1847 struct mxser_port *info = tty->driver_data;
1848
1849 /* startrx */
1850 info->ldisc_stop_rx = 0;
1851 if (I_IXOFF(tty)) {
1852 if (info->x_char)
1853 info->x_char = 0;
1854 else {
1855 if (info->board->chip_flag) {
1856 info->IER |= MOXA_MUST_RECV_ISR;
1857 outb(info->IER, info->ioaddr + UART_IER);
1858 } else {
1859 info->x_char = START_CHAR(tty);
1860 outb(0, info->ioaddr + UART_IER);
1861 info->IER |= UART_IER_THRI;
1862 outb(info->IER, info->ioaddr + UART_IER);
1863 }
1864 }
1865 }
1866
1867 if (info->tty->termios->c_cflag & CRTSCTS) {
1868 info->MCR |= UART_MCR_RTS;
1869 outb(info->MCR, info->ioaddr + UART_MCR);
1870 }
1871 }
1872
1873 /*
1874 * mxser_stop() and mxser_start()
1875 *
1876 * This routines are called before setting or resetting tty->stopped.
1877 * They enable or disable transmitter interrupts, as necessary.
1878 */
1879 static void mxser_stop(struct tty_struct *tty)
1880 {
1881 struct mxser_port *info = tty->driver_data;
1882 unsigned long flags;
1883
1884 spin_lock_irqsave(&info->slock, flags);
1885 if (info->IER & UART_IER_THRI) {
1886 info->IER &= ~UART_IER_THRI;
1887 outb(info->IER, info->ioaddr + UART_IER);
1888 }
1889 spin_unlock_irqrestore(&info->slock, flags);
1890 }
1891
1892 static void mxser_start(struct tty_struct *tty)
1893 {
1894 struct mxser_port *info = tty->driver_data;
1895 unsigned long flags;
1896
1897 spin_lock_irqsave(&info->slock, flags);
1898 if (info->xmit_cnt && info->xmit_buf) {
1899 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1900 info->IER |= UART_IER_THRI;
1901 outb(info->IER, info->ioaddr + UART_IER);
1902 }
1903 spin_unlock_irqrestore(&info->slock, flags);
1904 }
1905
1906 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1907 {
1908 struct mxser_port *info = tty->driver_data;
1909 unsigned long flags;
1910
1911 spin_lock_irqsave(&info->slock, flags);
1912 mxser_change_speed(info, old_termios);
1913 spin_unlock_irqrestore(&info->slock, flags);
1914
1915 if ((old_termios->c_cflag & CRTSCTS) &&
1916 !(tty->termios->c_cflag & CRTSCTS)) {
1917 tty->hw_stopped = 0;
1918 mxser_start(tty);
1919 }
1920
1921 /* Handle sw stopped */
1922 if ((old_termios->c_iflag & IXON) &&
1923 !(tty->termios->c_iflag & IXON)) {
1924 tty->stopped = 0;
1925
1926 if (info->board->chip_flag) {
1927 spin_lock_irqsave(&info->slock, flags);
1928 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
1929 spin_unlock_irqrestore(&info->slock, flags);
1930 }
1931
1932 mxser_start(tty);
1933 }
1934 }
1935
1936 /*
1937 * mxser_wait_until_sent() --- wait until the transmitter is empty
1938 */
1939 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1940 {
1941 struct mxser_port *info = tty->driver_data;
1942 unsigned long orig_jiffies, char_time;
1943 int lsr;
1944
1945 if (info->type == PORT_UNKNOWN)
1946 return;
1947
1948 if (info->xmit_fifo_size == 0)
1949 return; /* Just in case.... */
1950
1951 orig_jiffies = jiffies;
1952 /*
1953 * Set the check interval to be 1/5 of the estimated time to
1954 * send a single character, and make it at least 1. The check
1955 * interval should also be less than the timeout.
1956 *
1957 * Note: we have to use pretty tight timings here to satisfy
1958 * the NIST-PCTS.
1959 */
1960 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1961 char_time = char_time / 5;
1962 if (char_time == 0)
1963 char_time = 1;
1964 if (timeout && timeout < char_time)
1965 char_time = timeout;
1966 /*
1967 * If the transmitter hasn't cleared in twice the approximate
1968 * amount of time to send the entire FIFO, it probably won't
1969 * ever clear. This assumes the UART isn't doing flow
1970 * control, which is currently the case. Hence, if it ever
1971 * takes longer than info->timeout, this is probably due to a
1972 * UART bug of some kind. So, we clamp the timeout parameter at
1973 * 2*info->timeout.
1974 */
1975 if (!timeout || timeout > 2 * info->timeout)
1976 timeout = 2 * info->timeout;
1977 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1978 printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
1979 timeout, char_time);
1980 printk("jiff=%lu...", jiffies);
1981 #endif
1982 while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
1983 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1984 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1985 #endif
1986 schedule_timeout_interruptible(char_time);
1987 if (signal_pending(current))
1988 break;
1989 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1990 break;
1991 }
1992 set_current_state(TASK_RUNNING);
1993
1994 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1995 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1996 #endif
1997 }
1998
1999 /*
2000 * This routine is called by tty_hangup() when a hangup is signaled.
2001 */
2002 static void mxser_hangup(struct tty_struct *tty)
2003 {
2004 struct mxser_port *info = tty->driver_data;
2005
2006 mxser_flush_buffer(tty);
2007 mxser_shutdown(info);
2008 info->event = 0;
2009 info->count = 0;
2010 info->flags &= ~ASYNC_NORMAL_ACTIVE;
2011 info->tty = NULL;
2012 wake_up_interruptible(&info->open_wait);
2013 }
2014
2015 /*
2016 * mxser_rs_break() --- routine which turns the break handling on or off
2017 */
2018 static void mxser_rs_break(struct tty_struct *tty, int break_state)
2019 {
2020 struct mxser_port *info = tty->driver_data;
2021 unsigned long flags;
2022
2023 spin_lock_irqsave(&info->slock, flags);
2024 if (break_state == -1)
2025 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2026 info->ioaddr + UART_LCR);
2027 else
2028 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2029 info->ioaddr + UART_LCR);
2030 spin_unlock_irqrestore(&info->slock, flags);
2031 }
2032
2033 static void mxser_receive_chars(struct mxser_port *port, int *status)
2034 {
2035 struct tty_struct *tty = port->tty;
2036 unsigned char ch, gdl;
2037 int ignored = 0;
2038 int cnt = 0;
2039 int recv_room;
2040 int max = 256;
2041
2042 recv_room = tty->receive_room;
2043 if ((recv_room == 0) && (!port->ldisc_stop_rx))
2044 mxser_stoprx(tty);
2045
2046 if (port->board->chip_flag != MOXA_OTHER_UART) {
2047
2048 if (*status & UART_LSR_SPECIAL)
2049 goto intr_old;
2050 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2051 (*status & MOXA_MUST_LSR_RERR))
2052 goto intr_old;
2053 if (*status & MOXA_MUST_LSR_RERR)
2054 goto intr_old;
2055
2056 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2057
2058 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2059 gdl &= MOXA_MUST_GDL_MASK;
2060 if (gdl >= recv_room) {
2061 if (!port->ldisc_stop_rx)
2062 mxser_stoprx(tty);
2063 }
2064 while (gdl--) {
2065 ch = inb(port->ioaddr + UART_RX);
2066 tty_insert_flip_char(tty, ch, 0);
2067 cnt++;
2068 }
2069 goto end_intr;
2070 }
2071 intr_old:
2072
2073 do {
2074 if (max-- < 0)
2075 break;
2076
2077 ch = inb(port->ioaddr + UART_RX);
2078 if (port->board->chip_flag && (*status & UART_LSR_OE))
2079 outb(0x23, port->ioaddr + UART_FCR);
2080 *status &= port->read_status_mask;
2081 if (*status & port->ignore_status_mask) {
2082 if (++ignored > 100)
2083 break;
2084 } else {
2085 char flag = 0;
2086 if (*status & UART_LSR_SPECIAL) {
2087 if (*status & UART_LSR_BI) {
2088 flag = TTY_BREAK;
2089 port->icount.brk++;
2090
2091 if (port->flags & ASYNC_SAK)
2092 do_SAK(tty);
2093 } else if (*status & UART_LSR_PE) {
2094 flag = TTY_PARITY;
2095 port->icount.parity++;
2096 } else if (*status & UART_LSR_FE) {
2097 flag = TTY_FRAME;
2098 port->icount.frame++;
2099 } else if (*status & UART_LSR_OE) {
2100 flag = TTY_OVERRUN;
2101 port->icount.overrun++;
2102 } else
2103 flag = TTY_BREAK;
2104 }
2105 tty_insert_flip_char(tty, ch, flag);
2106 cnt++;
2107 if (cnt >= recv_room) {
2108 if (!port->ldisc_stop_rx)
2109 mxser_stoprx(tty);
2110 break;
2111 }
2112
2113 }
2114
2115 if (port->board->chip_flag)
2116 break;
2117
2118 *status = inb(port->ioaddr + UART_LSR);
2119 } while (*status & UART_LSR_DR);
2120
2121 end_intr:
2122 mxvar_log.rxcnt[port->tty->index] += cnt;
2123 port->mon_data.rxcnt += cnt;
2124 port->mon_data.up_rxcnt += cnt;
2125
2126 /*
2127 * We are called from an interrupt context with &port->slock
2128 * being held. Drop it temporarily in order to prevent
2129 * recursive locking.
2130 */
2131 spin_unlock(&port->slock);
2132 tty_flip_buffer_push(tty);
2133 spin_lock(&port->slock);
2134 }
2135
2136 static void mxser_transmit_chars(struct mxser_port *port)
2137 {
2138 int count, cnt;
2139
2140 if (port->x_char) {
2141 outb(port->x_char, port->ioaddr + UART_TX);
2142 port->x_char = 0;
2143 mxvar_log.txcnt[port->tty->index]++;
2144 port->mon_data.txcnt++;
2145 port->mon_data.up_txcnt++;
2146 port->icount.tx++;
2147 return;
2148 }
2149
2150 if (port->xmit_buf == NULL)
2151 return;
2152
2153 if ((port->xmit_cnt <= 0) || port->tty->stopped ||
2154 (port->tty->hw_stopped &&
2155 (port->type != PORT_16550A) &&
2156 (!port->board->chip_flag))) {
2157 port->IER &= ~UART_IER_THRI;
2158 outb(port->IER, port->ioaddr + UART_IER);
2159 return;
2160 }
2161
2162 cnt = port->xmit_cnt;
2163 count = port->xmit_fifo_size;
2164 do {
2165 outb(port->xmit_buf[port->xmit_tail++],
2166 port->ioaddr + UART_TX);
2167 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2168 if (--port->xmit_cnt <= 0)
2169 break;
2170 } while (--count > 0);
2171 mxvar_log.txcnt[port->tty->index] += (cnt - port->xmit_cnt);
2172
2173 port->mon_data.txcnt += (cnt - port->xmit_cnt);
2174 port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2175 port->icount.tx += (cnt - port->xmit_cnt);
2176
2177 if (port->xmit_cnt < WAKEUP_CHARS)
2178 tty_wakeup(port->tty);
2179
2180 if (port->xmit_cnt <= 0) {
2181 port->IER &= ~UART_IER_THRI;
2182 outb(port->IER, port->ioaddr + UART_IER);
2183 }
2184 }
2185
2186 /*
2187 * This is the serial driver's generic interrupt routine
2188 */
2189 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2190 {
2191 int status, iir, i;
2192 struct mxser_board *brd = NULL;
2193 struct mxser_port *port;
2194 int max, irqbits, bits, msr;
2195 unsigned int int_cnt, pass_counter = 0;
2196 int handled = IRQ_NONE;
2197
2198 for (i = 0; i < MXSER_BOARDS; i++)
2199 if (dev_id == &mxser_boards[i]) {
2200 brd = dev_id;
2201 break;
2202 }
2203
2204 if (i == MXSER_BOARDS)
2205 goto irq_stop;
2206 if (brd == NULL)
2207 goto irq_stop;
2208 max = brd->info->nports;
2209 while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
2210 irqbits = inb(brd->vector) & brd->vector_mask;
2211 if (irqbits == brd->vector_mask)
2212 break;
2213
2214 handled = IRQ_HANDLED;
2215 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2216 if (irqbits == brd->vector_mask)
2217 break;
2218 if (bits & irqbits)
2219 continue;
2220 port = &brd->ports[i];
2221
2222 int_cnt = 0;
2223 spin_lock(&port->slock);
2224 do {
2225 iir = inb(port->ioaddr + UART_IIR);
2226 if (iir & UART_IIR_NO_INT)
2227 break;
2228 iir &= MOXA_MUST_IIR_MASK;
2229 if (!port->tty ||
2230 (port->flags & ASYNC_CLOSING) ||
2231 !(port->flags &
2232 ASYNC_INITIALIZED)) {
2233 status = inb(port->ioaddr + UART_LSR);
2234 outb(0x27, port->ioaddr + UART_FCR);
2235 inb(port->ioaddr + UART_MSR);
2236 break;
2237 }
2238
2239 status = inb(port->ioaddr + UART_LSR);
2240
2241 if (status & UART_LSR_PE)
2242 port->err_shadow |= NPPI_NOTIFY_PARITY;
2243 if (status & UART_LSR_FE)
2244 port->err_shadow |= NPPI_NOTIFY_FRAMING;
2245 if (status & UART_LSR_OE)
2246 port->err_shadow |=
2247 NPPI_NOTIFY_HW_OVERRUN;
2248 if (status & UART_LSR_BI)
2249 port->err_shadow |= NPPI_NOTIFY_BREAK;
2250
2251 if (port->board->chip_flag) {
2252 if (iir == MOXA_MUST_IIR_GDA ||
2253 iir == MOXA_MUST_IIR_RDA ||
2254 iir == MOXA_MUST_IIR_RTO ||
2255 iir == MOXA_MUST_IIR_LSR)
2256 mxser_receive_chars(port,
2257 &status);
2258
2259 } else {
2260 status &= port->read_status_mask;
2261 if (status & UART_LSR_DR)
2262 mxser_receive_chars(port,
2263 &status);
2264 }
2265 msr = inb(port->ioaddr + UART_MSR);
2266 if (msr & UART_MSR_ANY_DELTA)
2267 mxser_check_modem_status(port, msr);
2268
2269 if (port->board->chip_flag) {
2270 if (iir == 0x02 && (status &
2271 UART_LSR_THRE))
2272 mxser_transmit_chars(port);
2273 } else {
2274 if (status & UART_LSR_THRE)
2275 mxser_transmit_chars(port);
2276 }
2277 } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2278 spin_unlock(&port->slock);
2279 }
2280 }
2281
2282 irq_stop:
2283 return handled;
2284 }
2285
2286 static const struct tty_operations mxser_ops = {
2287 .open = mxser_open,
2288 .close = mxser_close,
2289 .write = mxser_write,
2290 .put_char = mxser_put_char,
2291 .flush_chars = mxser_flush_chars,
2292 .write_room = mxser_write_room,
2293 .chars_in_buffer = mxser_chars_in_buffer,
2294 .flush_buffer = mxser_flush_buffer,
2295 .ioctl = mxser_ioctl,
2296 .throttle = mxser_throttle,
2297 .unthrottle = mxser_unthrottle,
2298 .set_termios = mxser_set_termios,
2299 .stop = mxser_stop,
2300 .start = mxser_start,
2301 .hangup = mxser_hangup,
2302 .break_ctl = mxser_rs_break,
2303 .wait_until_sent = mxser_wait_until_sent,
2304 .tiocmget = mxser_tiocmget,
2305 .tiocmset = mxser_tiocmset,
2306 };
2307
2308 /*
2309 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2310 */
2311
2312 static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev,
2313 unsigned int irq)
2314 {
2315 if (irq)
2316 free_irq(brd->irq, brd);
2317 if (pdev != NULL) { /* PCI */
2318 #ifdef CONFIG_PCI
2319 pci_release_region(pdev, 2);
2320 pci_release_region(pdev, 3);
2321 #endif
2322 } else {
2323 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2324 release_region(brd->vector, 1);
2325 }
2326 }
2327
2328 static int __devinit mxser_initbrd(struct mxser_board *brd,
2329 struct pci_dev *pdev)
2330 {
2331 struct mxser_port *info;
2332 unsigned int i;
2333 int retval;
2334
2335 printk(KERN_INFO "max. baud rate = %d bps.\n", brd->ports[0].max_baud);
2336
2337 for (i = 0; i < brd->info->nports; i++) {
2338 info = &brd->ports[i];
2339 info->board = brd;
2340 info->stop_rx = 0;
2341 info->ldisc_stop_rx = 0;
2342
2343 /* Enhance mode enabled here */
2344 if (brd->chip_flag != MOXA_OTHER_UART)
2345 ENABLE_MOXA_MUST_ENCHANCE_MODE(info->ioaddr);
2346
2347 info->flags = ASYNC_SHARE_IRQ;
2348 info->type = brd->uart_type;
2349
2350 process_txrx_fifo(info);
2351
2352 info->custom_divisor = info->baud_base * 16;
2353 info->close_delay = 5 * HZ / 10;
2354 info->closing_wait = 30 * HZ;
2355 info->normal_termios = mxvar_sdriver->init_termios;
2356 init_waitqueue_head(&info->open_wait);
2357 init_waitqueue_head(&info->delta_msr_wait);
2358 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2359 info->err_shadow = 0;
2360 spin_lock_init(&info->slock);
2361
2362 /* before set INT ISR, disable all int */
2363 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2364 info->ioaddr + UART_IER);
2365 }
2366
2367 retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
2368 brd);
2369 if (retval) {
2370 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2371 "conflict with another device.\n",
2372 brd->info->name, brd->irq);
2373 /* We hold resources, we need to release them. */
2374 mxser_release_res(brd, pdev, 0);
2375 }
2376 return retval;
2377 }
2378
2379 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2380 {
2381 int id, i, bits;
2382 unsigned short regs[16], irq;
2383 unsigned char scratch, scratch2;
2384
2385 brd->chip_flag = MOXA_OTHER_UART;
2386
2387 id = mxser_read_register(cap, regs);
2388 switch (id) {
2389 case C168_ASIC_ID:
2390 brd->info = &mxser_cards[0];
2391 break;
2392 case C104_ASIC_ID:
2393 brd->info = &mxser_cards[1];
2394 break;
2395 case CI104J_ASIC_ID:
2396 brd->info = &mxser_cards[2];
2397 break;
2398 case C102_ASIC_ID:
2399 brd->info = &mxser_cards[5];
2400 break;
2401 case CI132_ASIC_ID:
2402 brd->info = &mxser_cards[6];
2403 break;
2404 case CI134_ASIC_ID:
2405 brd->info = &mxser_cards[7];
2406 break;
2407 default:
2408 return 0;
2409 }
2410
2411 irq = 0;
2412 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2413 Flag-hack checks if configuration should be read as 2-port here. */
2414 if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2415 irq = regs[9] & 0xF000;
2416 irq = irq | (irq >> 4);
2417 if (irq != (regs[9] & 0xFF00))
2418 return MXSER_ERR_IRQ_CONFLIT;
2419 } else if (brd->info->nports == 4) {
2420 irq = regs[9] & 0xF000;
2421 irq = irq | (irq >> 4);
2422 irq = irq | (irq >> 8);
2423 if (irq != regs[9])
2424 return MXSER_ERR_IRQ_CONFLIT;
2425 } else if (brd->info->nports == 8) {
2426 irq = regs[9] & 0xF000;
2427 irq = irq | (irq >> 4);
2428 irq = irq | (irq >> 8);
2429 if ((irq != regs[9]) || (irq != regs[10]))
2430 return MXSER_ERR_IRQ_CONFLIT;
2431 }
2432
2433 if (!irq)
2434 return MXSER_ERR_IRQ;
2435 brd->irq = ((int)(irq & 0xF000) >> 12);
2436 for (i = 0; i < 8; i++)
2437 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2438 if ((regs[12] & 0x80) == 0)
2439 return MXSER_ERR_VECTOR;
2440 brd->vector = (int)regs[11]; /* interrupt vector */
2441 if (id == 1)
2442 brd->vector_mask = 0x00FF;
2443 else
2444 brd->vector_mask = 0x000F;
2445 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2446 if (regs[12] & bits) {
2447 brd->ports[i].baud_base = 921600;
2448 brd->ports[i].max_baud = 921600;
2449 } else {
2450 brd->ports[i].baud_base = 115200;
2451 brd->ports[i].max_baud = 115200;
2452 }
2453 }
2454 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2455 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2456 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
2457 outb(scratch2, cap + UART_LCR);
2458 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2459 scratch = inb(cap + UART_IIR);
2460
2461 if (scratch & 0xC0)
2462 brd->uart_type = PORT_16550A;
2463 else
2464 brd->uart_type = PORT_16450;
2465 if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2466 "mxser(IO)"))
2467 return MXSER_ERR_IOADDR;
2468 if (!request_region(brd->vector, 1, "mxser(vector)")) {
2469 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2470 return MXSER_ERR_VECTOR;
2471 }
2472 return brd->info->nports;
2473 }
2474
2475 static int __devinit mxser_probe(struct pci_dev *pdev,
2476 const struct pci_device_id *ent)
2477 {
2478 #ifdef CONFIG_PCI
2479 struct mxser_board *brd;
2480 unsigned int i, j;
2481 unsigned long ioaddress;
2482 int retval = -EINVAL;
2483
2484 for (i = 0; i < MXSER_BOARDS; i++)
2485 if (mxser_boards[i].info == NULL)
2486 break;
2487
2488 if (i >= MXSER_BOARDS) {
2489 printk(KERN_ERR "Too many Smartio/Industio family boards found "
2490 "(maximum %d), board not configured\n", MXSER_BOARDS);
2491 goto err;
2492 }
2493
2494 brd = &mxser_boards[i];
2495 brd->idx = i * MXSER_PORTS_PER_BOARD;
2496 printk(KERN_INFO "Found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2497 mxser_cards[ent->driver_data].name,
2498 pdev->bus->number, PCI_SLOT(pdev->devfn));
2499
2500 retval = pci_enable_device(pdev);
2501 if (retval) {
2502 printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
2503 goto err;
2504 }
2505
2506 /* io address */
2507 ioaddress = pci_resource_start(pdev, 2);
2508 retval = pci_request_region(pdev, 2, "mxser(IO)");
2509 if (retval)
2510 goto err;
2511
2512 brd->info = &mxser_cards[ent->driver_data];
2513 for (i = 0; i < brd->info->nports; i++)
2514 brd->ports[i].ioaddr = ioaddress + 8 * i;
2515
2516 /* vector */
2517 ioaddress = pci_resource_start(pdev, 3);
2518 retval = pci_request_region(pdev, 3, "mxser(vector)");
2519 if (retval)
2520 goto err_relio;
2521 brd->vector = ioaddress;
2522
2523 /* irq */
2524 brd->irq = pdev->irq;
2525
2526 brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2527 brd->uart_type = PORT_16550A;
2528 brd->vector_mask = 0;
2529
2530 for (i = 0; i < brd->info->nports; i++) {
2531 for (j = 0; j < UART_INFO_NUM; j++) {
2532 if (Gpci_uart_info[j].type == brd->chip_flag) {
2533 brd->ports[i].max_baud =
2534 Gpci_uart_info[j].max_baud;
2535
2536 /* exception....CP-102 */
2537 if (brd->info->flags & MXSER_HIGHBAUD)
2538 brd->ports[i].max_baud = 921600;
2539 break;
2540 }
2541 }
2542 }
2543
2544 if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2545 for (i = 0; i < brd->info->nports; i++) {
2546 if (i < 4)
2547 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2548 else
2549 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2550 }
2551 outb(0, ioaddress + 4); /* default set to RS232 mode */
2552 outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
2553 }
2554
2555 for (i = 0; i < brd->info->nports; i++) {
2556 brd->vector_mask |= (1 << i);
2557 brd->ports[i].baud_base = 921600;
2558 }
2559
2560 /* mxser_initbrd will hook ISR. */
2561 retval = mxser_initbrd(brd, pdev);
2562 if (retval)
2563 goto err_null;
2564
2565 for (i = 0; i < brd->info->nports; i++)
2566 tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
2567
2568 pci_set_drvdata(pdev, brd);
2569
2570 return 0;
2571 err_relio:
2572 pci_release_region(pdev, 2);
2573 err_null:
2574 brd->info = NULL;
2575 err:
2576 return retval;
2577 #else
2578 return -ENODEV;
2579 #endif
2580 }
2581
2582 static void __devexit mxser_remove(struct pci_dev *pdev)
2583 {
2584 struct mxser_board *brd = pci_get_drvdata(pdev);
2585 unsigned int i;
2586
2587 for (i = 0; i < brd->info->nports; i++)
2588 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2589
2590 mxser_release_res(brd, pdev, 1);
2591 brd->info = NULL;
2592 }
2593
2594 static struct pci_driver mxser_driver = {
2595 .name = "mxser",
2596 .id_table = mxser_pcibrds,
2597 .probe = mxser_probe,
2598 .remove = __devexit_p(mxser_remove)
2599 };
2600
2601 static int __init mxser_module_init(void)
2602 {
2603 struct mxser_board *brd;
2604 unsigned long cap;
2605 unsigned int i, m, isaloop;
2606 int retval, b;
2607
2608 pr_debug("Loading module mxser ...\n");
2609
2610 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2611 if (!mxvar_sdriver)
2612 return -ENOMEM;
2613
2614 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2615 MXSER_VERSION);
2616
2617 /* Initialize the tty_driver structure */
2618 mxvar_sdriver->owner = THIS_MODULE;
2619 mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
2620 mxvar_sdriver->name = "ttyMI";
2621 mxvar_sdriver->major = ttymajor;
2622 mxvar_sdriver->minor_start = 0;
2623 mxvar_sdriver->num = MXSER_PORTS + 1;
2624 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2625 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2626 mxvar_sdriver->init_termios = tty_std_termios;
2627 mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2628 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2629 tty_set_operations(mxvar_sdriver, &mxser_ops);
2630
2631 retval = tty_register_driver(mxvar_sdriver);
2632 if (retval) {
2633 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2634 "tty driver !\n");
2635 goto err_put;
2636 }
2637
2638 mxvar_diagflag = 0;
2639
2640 m = 0;
2641 /* Start finding ISA boards here */
2642 for (isaloop = 0; isaloop < 2; isaloop++)
2643 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
2644 if (!isaloop)
2645 cap = mxserBoardCAP[b]; /* predefined */
2646 else
2647 cap = ioaddr[b]; /* module param */
2648
2649 if (!cap)
2650 continue;
2651
2652 brd = &mxser_boards[m];
2653 retval = mxser_get_ISA_conf(cap, brd);
2654
2655 if (retval != 0)
2656 printk(KERN_INFO "Found MOXA %s board "
2657 "(CAP=0x%x)\n",
2658 brd->info->name, ioaddr[b]);
2659
2660 if (retval <= 0) {
2661 if (retval == MXSER_ERR_IRQ)
2662 printk(KERN_ERR "Invalid interrupt "
2663 "number, board not "
2664 "configured\n");
2665 else if (retval == MXSER_ERR_IRQ_CONFLIT)
2666 printk(KERN_ERR "Invalid interrupt "
2667 "number, board not "
2668 "configured\n");
2669 else if (retval == MXSER_ERR_VECTOR)
2670 printk(KERN_ERR "Invalid interrupt "
2671 "vector, board not "
2672 "configured\n");
2673 else if (retval == MXSER_ERR_IOADDR)
2674 printk(KERN_ERR "Invalid I/O address, "
2675 "board not configured\n");
2676
2677 brd->info = NULL;
2678 continue;
2679 }
2680
2681 /* mxser_initbrd will hook ISR. */
2682 if (mxser_initbrd(brd, NULL) < 0) {
2683 brd->info = NULL;
2684 continue;
2685 }
2686
2687 brd->idx = m * MXSER_PORTS_PER_BOARD;
2688 for (i = 0; i < brd->info->nports; i++)
2689 tty_register_device(mxvar_sdriver, brd->idx + i,
2690 NULL);
2691
2692 m++;
2693 }
2694
2695 retval = pci_register_driver(&mxser_driver);
2696 if (retval) {
2697 printk(KERN_ERR "Can't register pci driver\n");
2698 if (!m) {
2699 retval = -ENODEV;
2700 goto err_unr;
2701 } /* else: we have some ISA cards under control */
2702 }
2703
2704 pr_debug("Done.\n");
2705
2706 return 0;
2707 err_unr:
2708 tty_unregister_driver(mxvar_sdriver);
2709 err_put:
2710 put_tty_driver(mxvar_sdriver);
2711 return retval;
2712 }
2713
2714 static void __exit mxser_module_exit(void)
2715 {
2716 unsigned int i, j;
2717
2718 pr_debug("Unloading module mxser ...\n");
2719
2720 pci_unregister_driver(&mxser_driver);
2721
2722 for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2723 if (mxser_boards[i].info != NULL)
2724 for (j = 0; j < mxser_boards[i].info->nports; j++)
2725 tty_unregister_device(mxvar_sdriver,
2726 mxser_boards[i].idx + j);
2727 tty_unregister_driver(mxvar_sdriver);
2728 put_tty_driver(mxvar_sdriver);
2729
2730 for (i = 0; i < MXSER_BOARDS; i++)
2731 if (mxser_boards[i].info != NULL)
2732 mxser_release_res(&mxser_boards[i], NULL, 1);
2733
2734 pr_debug("Done.\n");
2735 }
2736
2737 module_init(mxser_module_init);
2738 module_exit(mxser_module_exit);
Support for the Chinese Samsung S3C2440 based development boards