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ACPI: ibm-acpi: rename some identifiers
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / char / mxser_new.c
blob1bb030b3a51a6ec3017cf2d21537ceef4f6f1fbf
1 /*
2 * mxser.c -- MOXA Smartio/Industio family multiport serial driver.
3 *
4 * Copyright (C) 1999-2006 Moxa Technologies (support@moxa.com.tw).
5 * Copyright (C) 2006 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/autoconf.h>
24 #include <linux/errno.h>
25 #include <linux/signal.h>
26 #include <linux/sched.h>
27 #include <linux/timer.h>
28 #include <linux/interrupt.h>
29 #include <linux/tty.h>
30 #include <linux/tty_flip.h>
31 #include <linux/serial.h>
32 #include <linux/serial_reg.h>
33 #include <linux/major.h>
34 #include <linux/string.h>
35 #include <linux/fcntl.h>
36 #include <linux/ptrace.h>
37 #include <linux/gfp.h>
38 #include <linux/ioport.h>
39 #include <linux/mm.h>
40 #include <linux/smp_lock.h>
41 #include <linux/delay.h>
42 #include <linux/pci.h>
43
44 #include <asm/system.h>
45 #include <asm/io.h>
46 #include <asm/irq.h>
47 #include <asm/bitops.h>
48 #include <asm/uaccess.h>
49
50 #include "mxser_new.h"
51
52 #define MXSER_VERSION "2.0"
53 #define MXSERMAJOR 174
54 #define MXSERCUMAJOR 175
55
56 #define MXSER_EVENT_TXLOW 1
57
58 #define MXSER_BOARDS 4 /* Max. boards */
59 #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
60 #define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
61 #define MXSER_ISR_PASS_LIMIT 99999L
62
63 #define MXSER_ERR_IOADDR -1
64 #define MXSER_ERR_IRQ -2
65 #define MXSER_ERR_IRQ_CONFLIT -3
66 #define MXSER_ERR_VECTOR -4
67
68 #define WAKEUP_CHARS 256
69
70 #define UART_MCR_AFE 0x20
71 #define UART_LSR_SPECIAL 0x1E
72
73 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|\
74 IXON|IXOFF))
75
76 #define C168_ASIC_ID 1
77 #define C104_ASIC_ID 2
78 #define C102_ASIC_ID 0xB
79 #define CI132_ASIC_ID 4
80 #define CI134_ASIC_ID 3
81 #define CI104J_ASIC_ID 5
82
83 #define MXSER_HIGHBAUD 1
84 #define MXSER_HAS2 2
85
86 /* This is only for PCI */
87 static const struct {
88 int type;
89 int tx_fifo;
90 int rx_fifo;
91 int xmit_fifo_size;
92 int rx_high_water;
93 int rx_trigger;
94 int rx_low_water;
95 long max_baud;
96 } Gpci_uart_info[] = {
97 {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
98 {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
99 {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
100 };
101 #define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info)
102
103 struct mxser_cardinfo {
104 unsigned int nports;
105 char *name;
106 unsigned int flags;
107 };
108
109 static const struct mxser_cardinfo mxser_cards[] = {
110 { 8, "C168 series", }, /* C168-ISA */
111 { 4, "C104 series", }, /* C104-ISA */
112 { 4, "CI-104J series", }, /* CI104J */
113 { 8, "C168H/PCI series", }, /* C168-PCI */
114 { 4, "C104H/PCI series", }, /* C104-PCI */
115 { 4, "C102 series", MXSER_HAS2 }, /* C102-ISA */
116 { 4, "CI-132 series", MXSER_HAS2 }, /* CI132 */
117 { 4, "CI-134 series", }, /* CI134 */
118 { 2, "CP-132 series", }, /* CP132 */
119 { 4, "CP-114 series", }, /* CP114 */
120 { 4, "CT-114 series", }, /* CT114 */
121 { 2, "CP-102 series", MXSER_HIGHBAUD }, /* CP102 */
122 { 4, "CP-104U series", }, /* CP104U */
123 { 8, "CP-168U series", }, /* CP168U */
124 { 2, "CP-132U series", }, /* CP132U */
125 { 4, "CP-134U series", }, /* CP134U */
126 { 4, "CP-104JU series", }, /* CP104JU */
127 { 8, "Moxa UC7000 Serial", }, /* RC7000 */
128 { 8, "CP-118U series", }, /* CP118U */
129 { 2, "CP-102UL series", }, /* CP102UL */
130 { 2, "CP-102U series", }, /* CP102U */
131 { 8, "CP-118EL series", }, /* CP118EL */
132 { 8, "CP-168EL series", }, /* CP168EL */
133 { 4, "CP-104EL series", } /* CP104EL */
134 };
135
136 /* driver_data correspond to the lines in the structure above
137 see also ISA probe function before you change something */
138 static struct pci_device_id mxser_pcibrds[] = {
139 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168),
140 .driver_data = 3 },
141 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104),
142 .driver_data = 4 },
143 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132),
144 .driver_data = 8 },
145 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114),
146 .driver_data = 9 },
147 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114),
148 .driver_data = 10 },
149 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102),
150 .driver_data = 11 },
151 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U),
152 .driver_data = 12 },
153 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U),
154 .driver_data = 13 },
155 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U),
156 .driver_data = 14 },
157 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U),
158 .driver_data = 15 },
159 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU),
160 .driver_data = 16 },
161 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000),
162 .driver_data = 17 },
163 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U),
164 .driver_data = 18 },
165 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL),
166 .driver_data = 19 },
167 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U),
168 .driver_data = 20 },
169 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118EL),
170 .driver_data = 21 },
171 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168EL),
172 .driver_data = 22 },
173 { PCI_DEVICE(PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104EL),
174 .driver_data = 23 },
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 static int calloutmajor = MXSERCUMAJOR;
182
183 /* Variables for insmod */
184
185 MODULE_AUTHOR("Casper Yang");
186 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
187 module_param_array(ioaddr, int, NULL, 0);
188 module_param(ttymajor, int, 0);
189 MODULE_LICENSE("GPL");
190
191 struct mxser_log {
192 int tick;
193 unsigned long rxcnt[MXSER_PORTS];
194 unsigned long txcnt[MXSER_PORTS];
195 };
196
197
198 struct mxser_mon {
199 unsigned long rxcnt;
200 unsigned long txcnt;
201 unsigned long up_rxcnt;
202 unsigned long up_txcnt;
203 int modem_status;
204 unsigned char hold_reason;
205 };
206
207 struct mxser_mon_ext {
208 unsigned long rx_cnt[32];
209 unsigned long tx_cnt[32];
210 unsigned long up_rxcnt[32];
211 unsigned long up_txcnt[32];
212 int modem_status[32];
213
214 long baudrate[32];
215 int databits[32];
216 int stopbits[32];
217 int parity[32];
218 int flowctrl[32];
219 int fifo[32];
220 int iftype[32];
221 };
222
223 struct mxser_board;
224
225 struct mxser_port {
226 struct mxser_board *board;
227 struct tty_struct *tty;
228
229 unsigned long ioaddr;
230 unsigned long opmode_ioaddr;
231 int max_baud;
232
233 int rx_high_water;
234 int rx_trigger; /* Rx fifo trigger level */
235 int rx_low_water;
236 int baud_base; /* max. speed */
237 long realbaud;
238 int type; /* UART type */
239 int flags; /* defined in tty.h */
240 long session; /* Session of opening process */
241 long pgrp; /* pgrp of opening process */
242
243 int x_char; /* xon/xoff character */
244 int IER; /* Interrupt Enable Register */
245 int MCR; /* Modem control register */
246
247 unsigned char stop_rx;
248 unsigned char ldisc_stop_rx;
249
250 int custom_divisor;
251 int close_delay;
252 unsigned short closing_wait;
253 unsigned char err_shadow;
254 unsigned long event;
255
256 int count; /* # of fd on device */
257 int blocked_open; /* # of blocked opens */
258 struct async_icount icount; /* kernel counters for 4 input interrupts */
259 int timeout;
260
261 int read_status_mask;
262 int ignore_status_mask;
263 int xmit_fifo_size;
264 unsigned char *xmit_buf;
265 int xmit_head;
266 int xmit_tail;
267 int xmit_cnt;
268
269 struct ktermios normal_termios;
270 struct ktermios callout_termios;
271
272 struct mxser_mon mon_data;
273
274 spinlock_t slock;
275 struct work_struct tqueue;
276 wait_queue_head_t open_wait;
277 wait_queue_head_t close_wait;
278 wait_queue_head_t delta_msr_wait;
279 };
280
281 struct mxser_board {
282 unsigned int idx;
283 int irq;
284 const struct mxser_cardinfo *info;
285 unsigned long vector;
286 unsigned long vector_mask;
287
288 int chip_flag;
289 int uart_type;
290
291 struct mxser_port ports[MXSER_PORTS_PER_BOARD];
292 };
293
294 struct mxser_mstatus {
295 tcflag_t cflag;
296 int cts;
297 int dsr;
298 int ri;
299 int dcd;
300 };
301
302 static struct mxser_mstatus GMStatus[MXSER_PORTS];
303
304 static int mxserBoardCAP[MXSER_BOARDS] = {
305 0, 0, 0, 0
306 /* 0x180, 0x280, 0x200, 0x320 */
307 };
308
309 static struct mxser_board mxser_boards[MXSER_BOARDS];
310 static struct tty_driver *mxvar_sdriver;
311 static struct mxser_log mxvar_log;
312 static int mxvar_diagflag;
313 static unsigned char mxser_msr[MXSER_PORTS + 1];
314 static struct mxser_mon_ext mon_data_ext;
315 static int mxser_set_baud_method[MXSER_PORTS + 1];
316 static spinlock_t gm_lock;
317
318 #ifdef CONFIG_PCI
319 static int CheckIsMoxaMust(int io)
320 {
321 u8 oldmcr, hwid;
322 int i;
323
324 outb(0, io + UART_LCR);
325 DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
326 oldmcr = inb(io + UART_MCR);
327 outb(0, io + UART_MCR);
328 SET_MOXA_MUST_XON1_VALUE(io, 0x11);
329 if ((hwid = inb(io + UART_MCR)) != 0) {
330 outb(oldmcr, io + UART_MCR);
331 return MOXA_OTHER_UART;
332 }
333
334 GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
335 for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
336 if (hwid == Gpci_uart_info[i].type)
337 return (int)hwid;
338 }
339 return MOXA_OTHER_UART;
340 }
341 #endif
342
343 static void process_txrx_fifo(struct mxser_port *info)
344 {
345 int i;
346
347 if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
348 info->rx_trigger = 1;
349 info->rx_high_water = 1;
350 info->rx_low_water = 1;
351 info->xmit_fifo_size = 1;
352 } else
353 for (i = 0; i < UART_INFO_NUM; i++)
354 if (info->board->chip_flag == Gpci_uart_info[i].type) {
355 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
356 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
357 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
358 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
359 break;
360 }
361 }
362
363 static void mxser_do_softint(struct work_struct *work)
364 {
365 struct mxser_port *info = container_of(work, struct mxser_port, tqueue);
366 struct tty_struct *tty = info->tty;
367
368 if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
369 tty_wakeup(tty);
370 }
371
372 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
373 {
374 unsigned char status = 0;
375
376 status = inb(baseaddr + UART_MSR);
377
378 mxser_msr[port] &= 0x0F;
379 mxser_msr[port] |= status;
380 status = mxser_msr[port];
381 if (mode)
382 mxser_msr[port] = 0;
383
384 return status;
385 }
386
387 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
388 struct mxser_port *port)
389 {
390 DECLARE_WAITQUEUE(wait, current);
391 int retval;
392 int do_clocal = 0;
393 unsigned long flags;
394
395 /*
396 * If non-blocking mode is set, or the port is not enabled,
397 * then make the check up front and then exit.
398 */
399 if ((filp->f_flags & O_NONBLOCK) ||
400 test_bit(TTY_IO_ERROR, &tty->flags)) {
401 port->flags |= ASYNC_NORMAL_ACTIVE;
402 return 0;
403 }
404
405 if (tty->termios->c_cflag & CLOCAL)
406 do_clocal = 1;
407
408 /*
409 * Block waiting for the carrier detect and the line to become
410 * free (i.e., not in use by the callout). While we are in
411 * this loop, port->count is dropped by one, so that
412 * mxser_close() knows when to free things. We restore it upon
413 * exit, either normal or abnormal.
414 */
415 retval = 0;
416 add_wait_queue(&port->open_wait, &wait);
417
418 spin_lock_irqsave(&port->slock, flags);
419 if (!tty_hung_up_p(filp))
420 port->count--;
421 spin_unlock_irqrestore(&port->slock, flags);
422 port->blocked_open++;
423 while (1) {
424 spin_lock_irqsave(&port->slock, flags);
425 outb(inb(port->ioaddr + UART_MCR) |
426 UART_MCR_DTR | UART_MCR_RTS, port->ioaddr + UART_MCR);
427 spin_unlock_irqrestore(&port->slock, flags);
428 set_current_state(TASK_INTERRUPTIBLE);
429 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
430 if (port->flags & ASYNC_HUP_NOTIFY)
431 retval = -EAGAIN;
432 else
433 retval = -ERESTARTSYS;
434 break;
435 }
436 if (!(port->flags & ASYNC_CLOSING) &&
437 (do_clocal ||
438 (inb(port->ioaddr + UART_MSR) & UART_MSR_DCD)))
439 break;
440 if (signal_pending(current)) {
441 retval = -ERESTARTSYS;
442 break;
443 }
444 schedule();
445 }
446 set_current_state(TASK_RUNNING);
447 remove_wait_queue(&port->open_wait, &wait);
448 if (!tty_hung_up_p(filp))
449 port->count++;
450 port->blocked_open--;
451 if (retval)
452 return retval;
453 port->flags |= ASYNC_NORMAL_ACTIVE;
454 return 0;
455 }
456
457 static int mxser_set_baud(struct mxser_port *info, long newspd)
458 {
459 int quot = 0;
460 unsigned char cval;
461 int ret = 0;
462 unsigned long flags;
463
464 if (!info->tty || !info->tty->termios)
465 return ret;
466
467 if (!(info->ioaddr))
468 return ret;
469
470 if (newspd > info->max_baud)
471 return 0;
472
473 info->realbaud = newspd;
474 if (newspd == 134) {
475 quot = (2 * info->baud_base / 269);
476 } else if (newspd) {
477 quot = info->baud_base / newspd;
478 if (quot == 0)
479 quot = 1;
480 } else {
481 quot = 0;
482 }
483
484 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
485 info->timeout += HZ / 50; /* Add .02 seconds of slop */
486
487 if (quot) {
488 spin_lock_irqsave(&info->slock, flags);
489 info->MCR |= UART_MCR_DTR;
490 outb(info->MCR, info->ioaddr + UART_MCR);
491 spin_unlock_irqrestore(&info->slock, flags);
492 } else {
493 spin_lock_irqsave(&info->slock, flags);
494 info->MCR &= ~UART_MCR_DTR;
495 outb(info->MCR, info->ioaddr + UART_MCR);
496 spin_unlock_irqrestore(&info->slock, flags);
497 return ret;
498 }
499
500 cval = inb(info->ioaddr + UART_LCR);
501
502 outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
503
504 outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
505 outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
506 outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
507
508
509 return ret;
510 }
511
512 /*
513 * This routine is called to set the UART divisor registers to match
514 * the specified baud rate for a serial port.
515 */
516 static int mxser_change_speed(struct mxser_port *info,
517 struct ktermios *old_termios)
518 {
519 unsigned cflag, cval, fcr;
520 int ret = 0;
521 unsigned char status;
522 long baud;
523 unsigned long flags;
524
525 if (!info->tty || !info->tty->termios)
526 return ret;
527 cflag = info->tty->termios->c_cflag;
528 if (!(info->ioaddr))
529 return ret;
530
531 if (mxser_set_baud_method[info->tty->index] == 0) {
532 baud = tty_get_baud_rate(info->tty);
533 mxser_set_baud(info, baud);
534 }
535
536 /* byte size and parity */
537 switch (cflag & CSIZE) {
538 case CS5:
539 cval = 0x00;
540 break;
541 case CS6:
542 cval = 0x01;
543 break;
544 case CS7:
545 cval = 0x02;
546 break;
547 case CS8:
548 cval = 0x03;
549 break;
550 default:
551 cval = 0x00;
552 break; /* too keep GCC shut... */
553 }
554 if (cflag & CSTOPB)
555 cval |= 0x04;
556 if (cflag & PARENB)
557 cval |= UART_LCR_PARITY;
558 if (!(cflag & PARODD))
559 cval |= UART_LCR_EPAR;
560 if (cflag & CMSPAR)
561 cval |= UART_LCR_SPAR;
562
563 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
564 if (info->board->chip_flag) {
565 fcr = UART_FCR_ENABLE_FIFO;
566 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
567 SET_MOXA_MUST_FIFO_VALUE(info);
568 } else
569 fcr = 0;
570 } else {
571 fcr = UART_FCR_ENABLE_FIFO;
572 if (info->board->chip_flag) {
573 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
574 SET_MOXA_MUST_FIFO_VALUE(info);
575 } else {
576 switch (info->rx_trigger) {
577 case 1:
578 fcr |= UART_FCR_TRIGGER_1;
579 break;
580 case 4:
581 fcr |= UART_FCR_TRIGGER_4;
582 break;
583 case 8:
584 fcr |= UART_FCR_TRIGGER_8;
585 break;
586 default:
587 fcr |= UART_FCR_TRIGGER_14;
588 break;
589 }
590 }
591 }
592
593 /* CTS flow control flag and modem status interrupts */
594 info->IER &= ~UART_IER_MSI;
595 info->MCR &= ~UART_MCR_AFE;
596 if (cflag & CRTSCTS) {
597 info->flags |= ASYNC_CTS_FLOW;
598 info->IER |= UART_IER_MSI;
599 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
600 info->MCR |= UART_MCR_AFE;
601 } else {
602 status = inb(info->ioaddr + UART_MSR);
603 if (info->tty->hw_stopped) {
604 if (status & UART_MSR_CTS) {
605 info->tty->hw_stopped = 0;
606 if (info->type != PORT_16550A &&
607 !info->board->chip_flag) {
608 outb(info->IER & ~UART_IER_THRI,
609 info->ioaddr +
610 UART_IER);
611 info->IER |= UART_IER_THRI;
612 outb(info->IER, info->ioaddr +
613 UART_IER);
614 }
615 set_bit(MXSER_EVENT_TXLOW, &info->event);
616 schedule_work(&info->tqueue); }
617 } else {
618 if (!(status & UART_MSR_CTS)) {
619 info->tty->hw_stopped = 1;
620 if ((info->type != PORT_16550A) &&
621 (!info->board->chip_flag)) {
622 info->IER &= ~UART_IER_THRI;
623 outb(info->IER, info->ioaddr +
624 UART_IER);
625 }
626 }
627 }
628 }
629 } else {
630 info->flags &= ~ASYNC_CTS_FLOW;
631 }
632 outb(info->MCR, info->ioaddr + UART_MCR);
633 if (cflag & CLOCAL) {
634 info->flags &= ~ASYNC_CHECK_CD;
635 } else {
636 info->flags |= ASYNC_CHECK_CD;
637 info->IER |= UART_IER_MSI;
638 }
639 outb(info->IER, info->ioaddr + UART_IER);
640
641 /*
642 * Set up parity check flag
643 */
644 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
645 if (I_INPCK(info->tty))
646 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
647 if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
648 info->read_status_mask |= UART_LSR_BI;
649
650 info->ignore_status_mask = 0;
651
652 if (I_IGNBRK(info->tty)) {
653 info->ignore_status_mask |= UART_LSR_BI;
654 info->read_status_mask |= UART_LSR_BI;
655 /*
656 * If we're ignore parity and break indicators, ignore
657 * overruns too. (For real raw support).
658 */
659 if (I_IGNPAR(info->tty)) {
660 info->ignore_status_mask |=
661 UART_LSR_OE |
662 UART_LSR_PE |
663 UART_LSR_FE;
664 info->read_status_mask |=
665 UART_LSR_OE |
666 UART_LSR_PE |
667 UART_LSR_FE;
668 }
669 }
670 if (info->board->chip_flag) {
671 spin_lock_irqsave(&info->slock, flags);
672 SET_MOXA_MUST_XON1_VALUE(info->ioaddr, START_CHAR(info->tty));
673 SET_MOXA_MUST_XOFF1_VALUE(info->ioaddr, STOP_CHAR(info->tty));
674 if (I_IXON(info->tty)) {
675 ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
676 } else {
677 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
678 }
679 if (I_IXOFF(info->tty)) {
680 ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
681 } else {
682 DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
683 }
684 spin_unlock_irqrestore(&info->slock, flags);
685 }
686
687
688 outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
689 outb(cval, info->ioaddr + UART_LCR);
690
691 return ret;
692 }
693
694 static void mxser_check_modem_status(struct mxser_port *port, int status)
695 {
696 /* update input line counters */
697 if (status & UART_MSR_TERI)
698 port->icount.rng++;
699 if (status & UART_MSR_DDSR)
700 port->icount.dsr++;
701 if (status & UART_MSR_DDCD)
702 port->icount.dcd++;
703 if (status & UART_MSR_DCTS)
704 port->icount.cts++;
705 port->mon_data.modem_status = status;
706 wake_up_interruptible(&port->delta_msr_wait);
707
708 if ((port->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
709 if (status & UART_MSR_DCD)
710 wake_up_interruptible(&port->open_wait);
711 schedule_work(&port->tqueue);
712 }
713
714 if (port->flags & ASYNC_CTS_FLOW) {
715 if (port->tty->hw_stopped) {
716 if (status & UART_MSR_CTS) {
717 port->tty->hw_stopped = 0;
718
719 if ((port->type != PORT_16550A) &&
720 (!port->board->chip_flag)) {
721 outb(port->IER & ~UART_IER_THRI,
722 port->ioaddr + UART_IER);
723 port->IER |= UART_IER_THRI;
724 outb(port->IER, port->ioaddr +
725 UART_IER);
726 }
727 set_bit(MXSER_EVENT_TXLOW, &port->event);
728 schedule_work(&port->tqueue);
729 }
730 } else {
731 if (!(status & UART_MSR_CTS)) {
732 port->tty->hw_stopped = 1;
733 if (port->type != PORT_16550A &&
734 !port->board->chip_flag) {
735 port->IER &= ~UART_IER_THRI;
736 outb(port->IER, port->ioaddr +
737 UART_IER);
738 }
739 }
740 }
741 }
742 }
743
744 static int mxser_startup(struct mxser_port *info)
745 {
746 unsigned long page;
747 unsigned long flags;
748
749 page = __get_free_page(GFP_KERNEL);
750 if (!page)
751 return -ENOMEM;
752
753 spin_lock_irqsave(&info->slock, flags);
754
755 if (info->flags & ASYNC_INITIALIZED) {
756 free_page(page);
757 spin_unlock_irqrestore(&info->slock, flags);
758 return 0;
759 }
760
761 if (!info->ioaddr || !info->type) {
762 if (info->tty)
763 set_bit(TTY_IO_ERROR, &info->tty->flags);
764 free_page(page);
765 spin_unlock_irqrestore(&info->slock, flags);
766 return 0;
767 }
768 if (info->xmit_buf)
769 free_page(page);
770 else
771 info->xmit_buf = (unsigned char *) page;
772
773 /*
774 * Clear the FIFO buffers and disable them
775 * (they will be reenabled in mxser_change_speed())
776 */
777 if (info->board->chip_flag)
778 outb((UART_FCR_CLEAR_RCVR |
779 UART_FCR_CLEAR_XMIT |
780 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
781 else
782 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
783 info->ioaddr + UART_FCR);
784
785 /*
786 * At this point there's no way the LSR could still be 0xFF;
787 * if it is, then bail out, because there's likely no UART
788 * here.
789 */
790 if (inb(info->ioaddr + UART_LSR) == 0xff) {
791 spin_unlock_irqrestore(&info->slock, flags);
792 if (capable(CAP_SYS_ADMIN)) {
793 if (info->tty)
794 set_bit(TTY_IO_ERROR, &info->tty->flags);
795 return 0;
796 } else
797 return -ENODEV;
798 }
799
800 /*
801 * Clear the interrupt registers.
802 */
803 (void) inb(info->ioaddr + UART_LSR);
804 (void) inb(info->ioaddr + UART_RX);
805 (void) inb(info->ioaddr + UART_IIR);
806 (void) inb(info->ioaddr + UART_MSR);
807
808 /*
809 * Now, initialize the UART
810 */
811 outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
812 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
813 outb(info->MCR, info->ioaddr + UART_MCR);
814
815 /*
816 * Finally, enable interrupts
817 */
818 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
819
820 if (info->board->chip_flag)
821 info->IER |= MOXA_MUST_IER_EGDAI;
822 outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
823
824 /*
825 * And clear the interrupt registers again for luck.
826 */
827 (void) inb(info->ioaddr + UART_LSR);
828 (void) inb(info->ioaddr + UART_RX);
829 (void) inb(info->ioaddr + UART_IIR);
830 (void) inb(info->ioaddr + UART_MSR);
831
832 if (info->tty)
833 clear_bit(TTY_IO_ERROR, &info->tty->flags);
834 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
835
836 /*
837 * and set the speed of the serial port
838 */
839 spin_unlock_irqrestore(&info->slock, flags);
840 mxser_change_speed(info, NULL);
841
842 info->flags |= ASYNC_INITIALIZED;
843 return 0;
844 }
845
846 /*
847 * This routine will shutdown a serial port; interrupts maybe disabled, and
848 * DTR is dropped if the hangup on close termio flag is on.
849 */
850 static void mxser_shutdown(struct mxser_port *info)
851 {
852 unsigned long flags;
853
854 if (!(info->flags & ASYNC_INITIALIZED))
855 return;
856
857 spin_lock_irqsave(&info->slock, flags);
858
859 /*
860 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
861 * here so the queue might never be waken up
862 */
863 wake_up_interruptible(&info->delta_msr_wait);
864
865 /*
866 * Free the IRQ, if necessary
867 */
868 if (info->xmit_buf) {
869 free_page((unsigned long) info->xmit_buf);
870 info->xmit_buf = NULL;
871 }
872
873 info->IER = 0;
874 outb(0x00, info->ioaddr + UART_IER);
875
876 if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
877 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
878 outb(info->MCR, info->ioaddr + UART_MCR);
879
880 /* clear Rx/Tx FIFO's */
881 if (info->board->chip_flag)
882 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
883 MOXA_MUST_FCR_GDA_MODE_ENABLE,
884 info->ioaddr + UART_FCR);
885 else
886 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
887 info->ioaddr + UART_FCR);
888
889 /* read data port to reset things */
890 (void) inb(info->ioaddr + UART_RX);
891
892 if (info->tty)
893 set_bit(TTY_IO_ERROR, &info->tty->flags);
894
895 info->flags &= ~ASYNC_INITIALIZED;
896
897 if (info->board->chip_flag)
898 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
899
900 spin_unlock_irqrestore(&info->slock, flags);
901 }
902
903 /*
904 * This routine is called whenever a serial port is opened. It
905 * enables interrupts for a serial port, linking in its async structure into
906 * the IRQ chain. It also performs the serial-specific
907 * initialization for the tty structure.
908 */
909 static int mxser_open(struct tty_struct *tty, struct file *filp)
910 {
911 struct mxser_port *info;
912 int retval, line;
913
914 /* initialize driver_data in case something fails */
915 tty->driver_data = NULL;
916
917 line = tty->index;
918 if (line == MXSER_PORTS)
919 return 0;
920 if (line < 0 || line > MXSER_PORTS)
921 return -ENODEV;
922 info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
923 if (!info->ioaddr)
924 return -ENODEV;
925
926 tty->driver_data = info;
927 info->tty = tty;
928 /*
929 * Start up serial port
930 */
931 info->count++;
932 retval = mxser_startup(info);
933 if (retval)
934 return retval;
935
936 retval = mxser_block_til_ready(tty, filp, info);
937 if (retval)
938 return retval;
939
940 if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
941 if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
942 *tty->termios = info->normal_termios;
943 else
944 *tty->termios = info->callout_termios;
945 mxser_change_speed(info, NULL);
946 }
947
948 info->session = process_session(current);
949 info->pgrp = process_group(current);
950
951 /* unmark here for very high baud rate (ex. 921600 bps) used */
952 tty->low_latency = 1;
953 return 0;
954 }
955
956 /*
957 * This routine is called when the serial port gets closed. First, we
958 * wait for the last remaining data to be sent. Then, we unlink its
959 * async structure from the interrupt chain if necessary, and we free
960 * that IRQ if nothing is left in the chain.
961 */
962 static void mxser_close(struct tty_struct *tty, struct file *filp)
963 {
964 struct mxser_port *info = tty->driver_data;
965
966 unsigned long timeout;
967 unsigned long flags;
968
969 if (tty->index == MXSER_PORTS)
970 return;
971 if (!info)
972 return;
973
974 spin_lock_irqsave(&info->slock, flags);
975
976 if (tty_hung_up_p(filp)) {
977 spin_unlock_irqrestore(&info->slock, flags);
978 return;
979 }
980 if ((tty->count == 1) && (info->count != 1)) {
981 /*
982 * Uh, oh. tty->count is 1, which means that the tty
983 * structure will be freed. Info->count should always
984 * be one in these conditions. If it's greater than
985 * one, we've got real problems, since it means the
986 * serial port won't be shutdown.
987 */
988 printk(KERN_ERR "mxser_close: bad serial port count; "
989 "tty->count is 1, info->count is %d\n", info->count);
990 info->count = 1;
991 }
992 if (--info->count < 0) {
993 printk(KERN_ERR "mxser_close: bad serial port count for "
994 "ttys%d: %d\n", tty->index, info->count);
995 info->count = 0;
996 }
997 if (info->count) {
998 spin_unlock_irqrestore(&info->slock, flags);
999 return;
1000 }
1001 info->flags |= ASYNC_CLOSING;
1002 spin_unlock_irqrestore(&info->slock, flags);
1003 /*
1004 * Save the termios structure, since this port may have
1005 * separate termios for callout and dialin.
1006 */
1007 if (info->flags & ASYNC_NORMAL_ACTIVE)
1008 info->normal_termios = *tty->termios;
1009 /*
1010 * Now we wait for the transmit buffer to clear; and we notify
1011 * the line discipline to only process XON/XOFF characters.
1012 */
1013 tty->closing = 1;
1014 if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1015 tty_wait_until_sent(tty, info->closing_wait);
1016 /*
1017 * At this point we stop accepting input. To do this, we
1018 * disable the receive line status interrupts, and tell the
1019 * interrupt driver to stop checking the data ready bit in the
1020 * line status register.
1021 */
1022 info->IER &= ~UART_IER_RLSI;
1023 if (info->board->chip_flag)
1024 info->IER &= ~MOXA_MUST_RECV_ISR;
1025
1026 if (info->flags & ASYNC_INITIALIZED) {
1027 outb(info->IER, info->ioaddr + UART_IER);
1028 /*
1029 * Before we drop DTR, make sure the UART transmitter
1030 * has completely drained; this is especially
1031 * important if there is a transmit FIFO!
1032 */
1033 timeout = jiffies + HZ;
1034 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1035 schedule_timeout_interruptible(5);
1036 if (time_after(jiffies, timeout))
1037 break;
1038 }
1039 }
1040 mxser_shutdown(info);
1041
1042 if (tty->driver->flush_buffer)
1043 tty->driver->flush_buffer(tty);
1044
1045 tty_ldisc_flush(tty);
1046
1047 tty->closing = 0;
1048 info->event = 0;
1049 info->tty = NULL;
1050 if (info->blocked_open) {
1051 if (info->close_delay)
1052 schedule_timeout_interruptible(info->close_delay);
1053 wake_up_interruptible(&info->open_wait);
1054 }
1055
1056 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1057 wake_up_interruptible(&info->close_wait);
1058
1059 }
1060
1061 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1062 {
1063 int c, total = 0;
1064 struct mxser_port *info = tty->driver_data;
1065 unsigned long flags;
1066
1067 if (!info->xmit_buf)
1068 return 0;
1069
1070 while (1) {
1071 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1072 SERIAL_XMIT_SIZE - info->xmit_head));
1073 if (c <= 0)
1074 break;
1075
1076 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1077 spin_lock_irqsave(&info->slock, flags);
1078 info->xmit_head = (info->xmit_head + c) &
1079 (SERIAL_XMIT_SIZE - 1);
1080 info->xmit_cnt += c;
1081 spin_unlock_irqrestore(&info->slock, flags);
1082
1083 buf += c;
1084 count -= c;
1085 total += c;
1086 }
1087
1088 if (info->xmit_cnt && !tty->stopped) {
1089 if (!tty->hw_stopped ||
1090 (info->type == PORT_16550A) ||
1091 (info->board->chip_flag)) {
1092 spin_lock_irqsave(&info->slock, flags);
1093 outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1094 UART_IER);
1095 info->IER |= UART_IER_THRI;
1096 outb(info->IER, info->ioaddr + UART_IER);
1097 spin_unlock_irqrestore(&info->slock, flags);
1098 }
1099 }
1100 return total;
1101 }
1102
1103 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1104 {
1105 struct mxser_port *info = tty->driver_data;
1106 unsigned long flags;
1107
1108 if (!info->xmit_buf)
1109 return;
1110
1111 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1112 return;
1113
1114 spin_lock_irqsave(&info->slock, flags);
1115 info->xmit_buf[info->xmit_head++] = ch;
1116 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1117 info->xmit_cnt++;
1118 spin_unlock_irqrestore(&info->slock, flags);
1119 if (!tty->stopped) {
1120 if (!tty->hw_stopped ||
1121 (info->type == PORT_16550A) ||
1122 info->board->chip_flag) {
1123 spin_lock_irqsave(&info->slock, flags);
1124 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1125 info->IER |= UART_IER_THRI;
1126 outb(info->IER, info->ioaddr + UART_IER);
1127 spin_unlock_irqrestore(&info->slock, flags);
1128 }
1129 }
1130 }
1131
1132
1133 static void mxser_flush_chars(struct tty_struct *tty)
1134 {
1135 struct mxser_port *info = tty->driver_data;
1136 unsigned long flags;
1137
1138 if (info->xmit_cnt <= 0 ||
1139 tty->stopped ||
1140 !info->xmit_buf ||
1141 (tty->hw_stopped &&
1142 (info->type != PORT_16550A) &&
1143 (!info->board->chip_flag)
1144 ))
1145 return;
1146
1147 spin_lock_irqsave(&info->slock, flags);
1148
1149 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1150 info->IER |= UART_IER_THRI;
1151 outb(info->IER, info->ioaddr + UART_IER);
1152
1153 spin_unlock_irqrestore(&info->slock, flags);
1154 }
1155
1156 static int mxser_write_room(struct tty_struct *tty)
1157 {
1158 struct mxser_port *info = tty->driver_data;
1159 int ret;
1160
1161 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1162 if (ret < 0)
1163 ret = 0;
1164 return ret;
1165 }
1166
1167 static int mxser_chars_in_buffer(struct tty_struct *tty)
1168 {
1169 struct mxser_port *info = tty->driver_data;
1170 return info->xmit_cnt;
1171 }
1172
1173 static void mxser_flush_buffer(struct tty_struct *tty)
1174 {
1175 struct mxser_port *info = tty->driver_data;
1176 char fcr;
1177 unsigned long flags;
1178
1179
1180 spin_lock_irqsave(&info->slock, flags);
1181 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1182
1183 fcr = inb(info->ioaddr + UART_FCR);
1184 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1185 info->ioaddr + UART_FCR);
1186 outb(fcr, info->ioaddr + UART_FCR);
1187
1188 spin_unlock_irqrestore(&info->slock, flags);
1189
1190 tty_wakeup(tty);
1191 }
1192
1193 /*
1194 * ------------------------------------------------------------
1195 * friends of mxser_ioctl()
1196 * ------------------------------------------------------------
1197 */
1198 static int mxser_get_serial_info(struct mxser_port *info,
1199 struct serial_struct __user *retinfo)
1200 {
1201 struct serial_struct tmp;
1202
1203 if (!retinfo)
1204 return -EFAULT;
1205 memset(&tmp, 0, sizeof(tmp));
1206 tmp.type = info->type;
1207 tmp.line = info->tty->index;
1208 tmp.port = info->ioaddr;
1209 tmp.irq = info->board->irq;
1210 tmp.flags = info->flags;
1211 tmp.baud_base = info->baud_base;
1212 tmp.close_delay = info->close_delay;
1213 tmp.closing_wait = info->closing_wait;
1214 tmp.custom_divisor = info->custom_divisor;
1215 tmp.hub6 = 0;
1216 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1217 return -EFAULT;
1218 return 0;
1219 }
1220
1221 static int mxser_set_serial_info(struct mxser_port *info,
1222 struct serial_struct __user *new_info)
1223 {
1224 struct serial_struct new_serial;
1225 unsigned int flags;
1226 int retval = 0;
1227
1228 if (!new_info || !info->ioaddr)
1229 return -EFAULT;
1230 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1231 return -EFAULT;
1232
1233 if ((new_serial.irq != info->board->irq) ||
1234 (new_serial.port != info->ioaddr) ||
1235 (new_serial.custom_divisor != info->custom_divisor) ||
1236 (new_serial.baud_base != info->baud_base))
1237 return -EPERM;
1238
1239 flags = info->flags & ASYNC_SPD_MASK;
1240
1241 if (!capable(CAP_SYS_ADMIN)) {
1242 if ((new_serial.baud_base != info->baud_base) ||
1243 (new_serial.close_delay != info->close_delay) ||
1244 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
1245 return -EPERM;
1246 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
1247 (new_serial.flags & ASYNC_USR_MASK));
1248 } else {
1249 /*
1250 * OK, past this point, all the error checking has been done.
1251 * At this point, we start making changes.....
1252 */
1253 info->flags = ((info->flags & ~ASYNC_FLAGS) |
1254 (new_serial.flags & ASYNC_FLAGS));
1255 info->close_delay = new_serial.close_delay * HZ / 100;
1256 info->closing_wait = new_serial.closing_wait * HZ / 100;
1257 info->tty->low_latency =
1258 (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1259 info->tty->low_latency = 0;
1260 }
1261
1262 info->type = new_serial.type;
1263
1264 process_txrx_fifo(info);
1265
1266 if (info->flags & ASYNC_INITIALIZED) {
1267 if (flags != (info->flags & ASYNC_SPD_MASK))
1268 mxser_change_speed(info, NULL);
1269 } else
1270 retval = mxser_startup(info);
1271
1272 return retval;
1273 }
1274
1275 /*
1276 * mxser_get_lsr_info - get line status register info
1277 *
1278 * Purpose: Let user call ioctl() to get info when the UART physically
1279 * is emptied. On bus types like RS485, the transmitter must
1280 * release the bus after transmitting. This must be done when
1281 * the transmit shift register is empty, not be done when the
1282 * transmit holding register is empty. This functionality
1283 * allows an RS485 driver to be written in user space.
1284 */
1285 static int mxser_get_lsr_info(struct mxser_port *info,
1286 unsigned int __user *value)
1287 {
1288 unsigned char status;
1289 unsigned int result;
1290 unsigned long flags;
1291
1292 spin_lock_irqsave(&info->slock, flags);
1293 status = inb(info->ioaddr + UART_LSR);
1294 spin_unlock_irqrestore(&info->slock, flags);
1295 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1296 return put_user(result, value);
1297 }
1298
1299 /*
1300 * This routine sends a break character out the serial port.
1301 */
1302 static void mxser_send_break(struct mxser_port *info, int duration)
1303 {
1304 unsigned long flags;
1305
1306 if (!info->ioaddr)
1307 return;
1308 set_current_state(TASK_INTERRUPTIBLE);
1309 spin_lock_irqsave(&info->slock, flags);
1310 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
1311 info->ioaddr + UART_LCR);
1312 spin_unlock_irqrestore(&info->slock, flags);
1313 schedule_timeout(duration);
1314 spin_lock_irqsave(&info->slock, flags);
1315 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
1316 info->ioaddr + UART_LCR);
1317 spin_unlock_irqrestore(&info->slock, flags);
1318 }
1319
1320 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
1321 {
1322 struct mxser_port *info = tty->driver_data;
1323 unsigned char control, status;
1324 unsigned long flags;
1325
1326
1327 if (tty->index == MXSER_PORTS)
1328 return -ENOIOCTLCMD;
1329 if (test_bit(TTY_IO_ERROR, &tty->flags))
1330 return -EIO;
1331
1332 control = info->MCR;
1333
1334 spin_lock_irqsave(&info->slock, flags);
1335 status = inb(info->ioaddr + UART_MSR);
1336 if (status & UART_MSR_ANY_DELTA)
1337 mxser_check_modem_status(info, status);
1338 spin_unlock_irqrestore(&info->slock, flags);
1339 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1340 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1341 ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1342 ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1343 ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1344 ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1345 }
1346
1347 static int mxser_tiocmset(struct tty_struct *tty, struct file *file,
1348 unsigned int set, unsigned int clear)
1349 {
1350 struct mxser_port *info = tty->driver_data;
1351 unsigned long flags;
1352
1353
1354 if (tty->index == MXSER_PORTS)
1355 return -ENOIOCTLCMD;
1356 if (test_bit(TTY_IO_ERROR, &tty->flags))
1357 return -EIO;
1358
1359 spin_lock_irqsave(&info->slock, flags);
1360
1361 if (set & TIOCM_RTS)
1362 info->MCR |= UART_MCR_RTS;
1363 if (set & TIOCM_DTR)
1364 info->MCR |= UART_MCR_DTR;
1365
1366 if (clear & TIOCM_RTS)
1367 info->MCR &= ~UART_MCR_RTS;
1368 if (clear & TIOCM_DTR)
1369 info->MCR &= ~UART_MCR_DTR;
1370
1371 outb(info->MCR, info->ioaddr + UART_MCR);
1372 spin_unlock_irqrestore(&info->slock, flags);
1373 return 0;
1374 }
1375
1376 static int mxser_program_mode(int port)
1377 {
1378 int id, i, j, n;
1379
1380 spin_lock(&gm_lock);
1381 outb(0, port);
1382 outb(0, port);
1383 outb(0, port);
1384 (void)inb(port);
1385 (void)inb(port);
1386 outb(0, port);
1387 (void)inb(port);
1388 spin_unlock(&gm_lock);
1389
1390 id = inb(port + 1) & 0x1F;
1391 if ((id != C168_ASIC_ID) &&
1392 (id != C104_ASIC_ID) &&
1393 (id != C102_ASIC_ID) &&
1394 (id != CI132_ASIC_ID) &&
1395 (id != CI134_ASIC_ID) &&
1396 (id != CI104J_ASIC_ID))
1397 return -1;
1398 for (i = 0, j = 0; i < 4; i++) {
1399 n = inb(port + 2);
1400 if (n == 'M') {
1401 j = 1;
1402 } else if ((j == 1) && (n == 1)) {
1403 j = 2;
1404 break;
1405 } else
1406 j = 0;
1407 }
1408 if (j != 2)
1409 id = -2;
1410 return id;
1411 }
1412
1413 static void mxser_normal_mode(int port)
1414 {
1415 int i, n;
1416
1417 outb(0xA5, port + 1);
1418 outb(0x80, port + 3);
1419 outb(12, port + 0); /* 9600 bps */
1420 outb(0, port + 1);
1421 outb(0x03, port + 3); /* 8 data bits */
1422 outb(0x13, port + 4); /* loop back mode */
1423 for (i = 0; i < 16; i++) {
1424 n = inb(port + 5);
1425 if ((n & 0x61) == 0x60)
1426 break;
1427 if ((n & 1) == 1)
1428 (void)inb(port);
1429 }
1430 outb(0x00, port + 4);
1431 }
1432
1433 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1434 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1435 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1436 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1437 #define EN_CCMD 0x000 /* Chip's command register */
1438 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1439 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1440 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1441 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1442 #define EN0_DCFG 0x00E /* Data configuration reg WR */
1443 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1444 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1445 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
1446 static int mxser_read_register(int port, unsigned short *regs)
1447 {
1448 int i, k, value, id;
1449 unsigned int j;
1450
1451 id = mxser_program_mode(port);
1452 if (id < 0)
1453 return id;
1454 for (i = 0; i < 14; i++) {
1455 k = (i & 0x3F) | 0x180;
1456 for (j = 0x100; j > 0; j >>= 1) {
1457 outb(CHIP_CS, port);
1458 if (k & j) {
1459 outb(CHIP_CS | CHIP_DO, port);
1460 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
1461 } else {
1462 outb(CHIP_CS, port);
1463 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
1464 }
1465 }
1466 (void)inb(port);
1467 value = 0;
1468 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1469 outb(CHIP_CS, port);
1470 outb(CHIP_CS | CHIP_SK, port);
1471 if (inb(port) & CHIP_DI)
1472 value |= j;
1473 }
1474 regs[i] = value;
1475 outb(0, port);
1476 }
1477 mxser_normal_mode(port);
1478 return id;
1479 }
1480
1481 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1482 {
1483 struct mxser_port *port;
1484 int result, status;
1485 unsigned int i, j;
1486
1487 switch (cmd) {
1488 case MOXA_GET_CONF:
1489 /* if (copy_to_user(argp, mxsercfg,
1490 sizeof(struct mxser_hwconf) * 4))
1491 return -EFAULT;
1492 return 0;*/
1493 return -ENXIO;
1494 case MOXA_GET_MAJOR:
1495 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1496 return -EFAULT;
1497 return 0;
1498
1499 case MOXA_GET_CUMAJOR:
1500 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1501 return -EFAULT;
1502 return 0;
1503
1504 case MOXA_CHKPORTENABLE:
1505 result = 0;
1506
1507 for (i = 0; i < MXSER_BOARDS; i++)
1508 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1509 if (mxser_boards[i].ports[j].ioaddr)
1510 result |= (1 << i);
1511
1512 return put_user(result, (unsigned long __user *)argp);
1513 case MOXA_GETDATACOUNT:
1514 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1515 return -EFAULT;
1516 return 0;
1517 case MOXA_GETMSTATUS:
1518 for (i = 0; i < MXSER_BOARDS; i++)
1519 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1520 port = &mxser_boards[i].ports[j];
1521
1522 GMStatus[i].ri = 0;
1523 if (!port->ioaddr) {
1524 GMStatus[i].dcd = 0;
1525 GMStatus[i].dsr = 0;
1526 GMStatus[i].cts = 0;
1527 continue;
1528 }
1529
1530 if (!port->tty || !port->tty->termios)
1531 GMStatus[i].cflag =
1532 port->normal_termios.c_cflag;
1533 else
1534 GMStatus[i].cflag =
1535 port->tty->termios->c_cflag;
1536
1537 status = inb(port->ioaddr + UART_MSR);
1538 if (status & 0x80 /*UART_MSR_DCD */ )
1539 GMStatus[i].dcd = 1;
1540 else
1541 GMStatus[i].dcd = 0;
1542
1543 if (status & 0x20 /*UART_MSR_DSR */ )
1544 GMStatus[i].dsr = 1;
1545 else
1546 GMStatus[i].dsr = 0;
1547
1548
1549 if (status & 0x10 /*UART_MSR_CTS */ )
1550 GMStatus[i].cts = 1;
1551 else
1552 GMStatus[i].cts = 0;
1553 }
1554 if (copy_to_user(argp, GMStatus,
1555 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1556 return -EFAULT;
1557 return 0;
1558 case MOXA_ASPP_MON_EXT: {
1559 int status, p, shiftbit;
1560 unsigned long opmode;
1561 unsigned cflag, iflag;
1562
1563 for (i = 0; i < MXSER_BOARDS; i++)
1564 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1565 port = &mxser_boards[i].ports[j];
1566 if (!port->ioaddr)
1567 continue;
1568
1569 status = mxser_get_msr(port->ioaddr, 0, i);
1570
1571 if (status & UART_MSR_TERI)
1572 port->icount.rng++;
1573 if (status & UART_MSR_DDSR)
1574 port->icount.dsr++;
1575 if (status & UART_MSR_DDCD)
1576 port->icount.dcd++;
1577 if (status & UART_MSR_DCTS)
1578 port->icount.cts++;
1579
1580 port->mon_data.modem_status = status;
1581 mon_data_ext.rx_cnt[i] = port->mon_data.rxcnt;
1582 mon_data_ext.tx_cnt[i] = port->mon_data.txcnt;
1583 mon_data_ext.up_rxcnt[i] =
1584 port->mon_data.up_rxcnt;
1585 mon_data_ext.up_txcnt[i] =
1586 port->mon_data.up_txcnt;
1587 mon_data_ext.modem_status[i] =
1588 port->mon_data.modem_status;
1589 mon_data_ext.baudrate[i] = port->realbaud;
1590
1591 if (!port->tty || !port->tty->termios) {
1592 cflag = port->normal_termios.c_cflag;
1593 iflag = port->normal_termios.c_iflag;
1594 } else {
1595 cflag = port->tty->termios->c_cflag;
1596 iflag = port->tty->termios->c_iflag;
1597 }
1598
1599 mon_data_ext.databits[i] = cflag & CSIZE;
1600
1601 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1602
1603 mon_data_ext.parity[i] =
1604 cflag & (PARENB | PARODD | CMSPAR);
1605
1606 mon_data_ext.flowctrl[i] = 0x00;
1607
1608 if (cflag & CRTSCTS)
1609 mon_data_ext.flowctrl[i] |= 0x03;
1610
1611 if (iflag & (IXON | IXOFF))
1612 mon_data_ext.flowctrl[i] |= 0x0C;
1613
1614 if (port->type == PORT_16550A)
1615 mon_data_ext.fifo[i] = 1;
1616 else
1617 mon_data_ext.fifo[i] = 0;
1618
1619 p = i % 4;
1620 shiftbit = p * 2;
1621 opmode = inb(port->opmode_ioaddr) >> shiftbit;
1622 opmode &= OP_MODE_MASK;
1623
1624 mon_data_ext.iftype[i] = opmode;
1625
1626 }
1627 if (copy_to_user(argp, &mon_data_ext,
1628 sizeof(mon_data_ext)))
1629 return -EFAULT;
1630
1631 return 0;
1632
1633 } default:
1634 return -ENOIOCTLCMD;
1635 }
1636 return 0;
1637 }
1638
1639 static int mxser_ioctl(struct tty_struct *tty, struct file *file,
1640 unsigned int cmd, unsigned long arg)
1641 {
1642 struct mxser_port *info = tty->driver_data;
1643 struct async_icount cprev, cnow; /* kernel counter temps */
1644 struct serial_icounter_struct __user *p_cuser;
1645 unsigned long templ;
1646 unsigned long flags;
1647 void __user *argp = (void __user *)arg;
1648 int retval;
1649
1650 if (tty->index == MXSER_PORTS)
1651 return mxser_ioctl_special(cmd, argp);
1652
1653 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1654 int p;
1655 unsigned long opmode;
1656 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1657 int shiftbit;
1658 unsigned char val, mask;
1659
1660 p = tty->index % 4;
1661 if (cmd == MOXA_SET_OP_MODE) {
1662 if (get_user(opmode, (int __user *) argp))
1663 return -EFAULT;
1664 if (opmode != RS232_MODE &&
1665 opmode != RS485_2WIRE_MODE &&
1666 opmode != RS422_MODE &&
1667 opmode != RS485_4WIRE_MODE)
1668 return -EFAULT;
1669 mask = ModeMask[p];
1670 shiftbit = p * 2;
1671 val = inb(info->opmode_ioaddr);
1672 val &= mask;
1673 val |= (opmode << shiftbit);
1674 outb(val, info->opmode_ioaddr);
1675 } else {
1676 shiftbit = p * 2;
1677 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1678 opmode &= OP_MODE_MASK;
1679 if (copy_to_user(argp, &opmode, sizeof(int)))
1680 return -EFAULT;
1681 }
1682 return 0;
1683 }
1684
1685 if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT &&
1686 test_bit(TTY_IO_ERROR, &tty->flags))
1687 return -EIO;
1688
1689 switch (cmd) {
1690 case TCSBRK: /* SVID version: non-zero arg --> no break */
1691 retval = tty_check_change(tty);
1692 if (retval)
1693 return retval;
1694 tty_wait_until_sent(tty, 0);
1695 if (!arg)
1696 mxser_send_break(info, HZ / 4); /* 1/4 second */
1697 return 0;
1698 case TCSBRKP: /* support for POSIX tcsendbreak() */
1699 retval = tty_check_change(tty);
1700 if (retval)
1701 return retval;
1702 tty_wait_until_sent(tty, 0);
1703 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1704 return 0;
1705 case TIOCGSOFTCAR:
1706 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
1707 case TIOCSSOFTCAR:
1708 if (get_user(templ, (unsigned long __user *) argp))
1709 return -EFAULT;
1710 arg = templ;
1711 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1712 return 0;
1713 case TIOCGSERIAL:
1714 return mxser_get_serial_info(info, argp);
1715 case TIOCSSERIAL:
1716 return mxser_set_serial_info(info, argp);
1717 case TIOCSERGETLSR: /* Get line status register */
1718 return mxser_get_lsr_info(info, argp);
1719 /*
1720 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1721 * - mask passed in arg for lines of interest
1722 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1723 * Caller should use TIOCGICOUNT to see which one it was
1724 */
1725 case TIOCMIWAIT: {
1726 DECLARE_WAITQUEUE(wait, current);
1727 int ret;
1728 spin_lock_irqsave(&info->slock, flags);
1729 cprev = info->icount; /* note the counters on entry */
1730 spin_unlock_irqrestore(&info->slock, flags);
1731
1732 add_wait_queue(&info->delta_msr_wait, &wait);
1733 while (1) {
1734 spin_lock_irqsave(&info->slock, flags);
1735 cnow = info->icount; /* atomic copy */
1736 spin_unlock_irqrestore(&info->slock, flags);
1737
1738 set_current_state(TASK_INTERRUPTIBLE);
1739 if (((arg & TIOCM_RNG) &&
1740 (cnow.rng != cprev.rng)) ||
1741 ((arg & TIOCM_DSR) &&
1742 (cnow.dsr != cprev.dsr)) ||
1743 ((arg & TIOCM_CD) &&
1744 (cnow.dcd != cprev.dcd)) ||
1745 ((arg & TIOCM_CTS) &&
1746 (cnow.cts != cprev.cts))) {
1747 ret = 0;
1748 break;
1749 }
1750 /* see if a signal did it */
1751 if (signal_pending(current)) {
1752 ret = -ERESTARTSYS;
1753 break;
1754 }
1755 cprev = cnow;
1756 }
1757 current->state = TASK_RUNNING;
1758 remove_wait_queue(&info->delta_msr_wait, &wait);
1759 break;
1760 }
1761 /* NOTREACHED */
1762 /*
1763 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1764 * Return: write counters to the user passed counter struct
1765 * NB: both 1->0 and 0->1 transitions are counted except for
1766 * RI where only 0->1 is counted.
1767 */
1768 case TIOCGICOUNT:
1769 spin_lock_irqsave(&info->slock, flags);
1770 cnow = info->icount;
1771 spin_unlock_irqrestore(&info->slock, flags);
1772 p_cuser = argp;
1773 if (put_user(cnow.frame, &p_cuser->frame))
1774 return -EFAULT;
1775 if (put_user(cnow.brk, &p_cuser->brk))
1776 return -EFAULT;
1777 if (put_user(cnow.overrun, &p_cuser->overrun))
1778 return -EFAULT;
1779 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1780 return -EFAULT;
1781 if (put_user(cnow.parity, &p_cuser->parity))
1782 return -EFAULT;
1783 if (put_user(cnow.rx, &p_cuser->rx))
1784 return -EFAULT;
1785 if (put_user(cnow.tx, &p_cuser->tx))
1786 return -EFAULT;
1787 put_user(cnow.cts, &p_cuser->cts);
1788 put_user(cnow.dsr, &p_cuser->dsr);
1789 put_user(cnow.rng, &p_cuser->rng);
1790 put_user(cnow.dcd, &p_cuser->dcd);
1791 return 0;
1792 case MOXA_HighSpeedOn:
1793 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1794 case MOXA_SDS_RSTICOUNTER:
1795 info->mon_data.rxcnt = 0;
1796 info->mon_data.txcnt = 0;
1797 return 0;
1798 case MOXA_ASPP_SETBAUD:{
1799 long baud;
1800 if (get_user(baud, (long __user *)argp))
1801 return -EFAULT;
1802 mxser_set_baud(info, baud);
1803 return 0;
1804 }
1805 case MOXA_ASPP_GETBAUD:
1806 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1807 return -EFAULT;
1808
1809 return 0;
1810
1811 case MOXA_ASPP_OQUEUE:{
1812 int len, lsr;
1813
1814 len = mxser_chars_in_buffer(tty);
1815
1816 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
1817
1818 len += (lsr ? 0 : 1);
1819
1820 if (copy_to_user(argp, &len, sizeof(int)))
1821 return -EFAULT;
1822
1823 return 0;
1824 }
1825 case MOXA_ASPP_MON: {
1826 int mcr, status;
1827
1828 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1829 mxser_check_modem_status(info, status);
1830
1831 mcr = inb(info->ioaddr + UART_MCR);
1832 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1833 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1834 else
1835 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1836
1837 if (mcr & MOXA_MUST_MCR_TX_XON)
1838 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1839 else
1840 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1841
1842 if (info->tty->hw_stopped)
1843 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1844 else
1845 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1846
1847 if (copy_to_user(argp, &info->mon_data,
1848 sizeof(struct mxser_mon)))
1849 return -EFAULT;
1850
1851 return 0;
1852 }
1853 case MOXA_ASPP_LSTATUS: {
1854 if (copy_to_user(argp, &info->err_shadow,
1855 sizeof(unsigned char)))
1856 return -EFAULT;
1857
1858 info->err_shadow = 0;
1859 return 0;
1860 }
1861 case MOXA_SET_BAUD_METHOD: {
1862 int method;
1863
1864 if (get_user(method, (int __user *)argp))
1865 return -EFAULT;
1866 mxser_set_baud_method[tty->index] = method;
1867 if (copy_to_user(argp, &method, sizeof(int)))
1868 return -EFAULT;
1869
1870 return 0;
1871 }
1872 default:
1873 return -ENOIOCTLCMD;
1874 }
1875 return 0;
1876 }
1877
1878 static void mxser_stoprx(struct tty_struct *tty)
1879 {
1880 struct mxser_port *info = tty->driver_data;
1881
1882 info->ldisc_stop_rx = 1;
1883 if (I_IXOFF(tty)) {
1884 if (info->board->chip_flag) {
1885 info->IER &= ~MOXA_MUST_RECV_ISR;
1886 outb(info->IER, info->ioaddr + UART_IER);
1887 } else {
1888 info->x_char = STOP_CHAR(tty);
1889 outb(0, info->ioaddr + UART_IER);
1890 info->IER |= UART_IER_THRI;
1891 outb(info->IER, info->ioaddr + UART_IER);
1892 }
1893 }
1894
1895 if (info->tty->termios->c_cflag & CRTSCTS) {
1896 info->MCR &= ~UART_MCR_RTS;
1897 outb(info->MCR, info->ioaddr + UART_MCR);
1898 }
1899 }
1900
1901 /*
1902 * This routine is called by the upper-layer tty layer to signal that
1903 * incoming characters should be throttled.
1904 */
1905 static void mxser_throttle(struct tty_struct *tty)
1906 {
1907 mxser_stoprx(tty);
1908 }
1909
1910 static void mxser_unthrottle(struct tty_struct *tty)
1911 {
1912 struct mxser_port *info = tty->driver_data;
1913
1914 /* startrx */
1915 info->ldisc_stop_rx = 0;
1916 if (I_IXOFF(tty)) {
1917 if (info->x_char)
1918 info->x_char = 0;
1919 else {
1920 if (info->board->chip_flag) {
1921 info->IER |= MOXA_MUST_RECV_ISR;
1922 outb(info->IER, info->ioaddr + UART_IER);
1923 } else {
1924 info->x_char = START_CHAR(tty);
1925 outb(0, info->ioaddr + UART_IER);
1926 info->IER |= UART_IER_THRI;
1927 outb(info->IER, info->ioaddr + UART_IER);
1928 }
1929 }
1930 }
1931
1932 if (info->tty->termios->c_cflag & CRTSCTS) {
1933 info->MCR |= UART_MCR_RTS;
1934 outb(info->MCR, info->ioaddr + UART_MCR);
1935 }
1936 }
1937
1938 /*
1939 * mxser_stop() and mxser_start()
1940 *
1941 * This routines are called before setting or resetting tty->stopped.
1942 * They enable or disable transmitter interrupts, as necessary.
1943 */
1944 static void mxser_stop(struct tty_struct *tty)
1945 {
1946 struct mxser_port *info = tty->driver_data;
1947 unsigned long flags;
1948
1949 spin_lock_irqsave(&info->slock, flags);
1950 if (info->IER & UART_IER_THRI) {
1951 info->IER &= ~UART_IER_THRI;
1952 outb(info->IER, info->ioaddr + UART_IER);
1953 }
1954 spin_unlock_irqrestore(&info->slock, flags);
1955 }
1956
1957 static void mxser_start(struct tty_struct *tty)
1958 {
1959 struct mxser_port *info = tty->driver_data;
1960 unsigned long flags;
1961
1962 spin_lock_irqsave(&info->slock, flags);
1963 if (info->xmit_cnt && info->xmit_buf) {
1964 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1965 info->IER |= UART_IER_THRI;
1966 outb(info->IER, info->ioaddr + UART_IER);
1967 }
1968 spin_unlock_irqrestore(&info->slock, flags);
1969 }
1970
1971 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1972 {
1973 struct mxser_port *info = tty->driver_data;
1974 unsigned long flags;
1975
1976 if ((tty->termios->c_cflag != old_termios->c_cflag) ||
1977 (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
1978
1979 mxser_change_speed(info, old_termios);
1980
1981 if ((old_termios->c_cflag & CRTSCTS) &&
1982 !(tty->termios->c_cflag & CRTSCTS)) {
1983 tty->hw_stopped = 0;
1984 mxser_start(tty);
1985 }
1986 }
1987
1988 /* Handle sw stopped */
1989 if ((old_termios->c_iflag & IXON) &&
1990 !(tty->termios->c_iflag & IXON)) {
1991 tty->stopped = 0;
1992
1993 if (info->board->chip_flag) {
1994 spin_lock_irqsave(&info->slock, flags);
1995 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->ioaddr);
1996 spin_unlock_irqrestore(&info->slock, flags);
1997 }
1998
1999 mxser_start(tty);
2000 }
2001 }
2002
2003 /*
2004 * mxser_wait_until_sent() --- wait until the transmitter is empty
2005 */
2006 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
2007 {
2008 struct mxser_port *info = tty->driver_data;
2009 unsigned long orig_jiffies, char_time;
2010 int lsr;
2011
2012 if (info->type == PORT_UNKNOWN)
2013 return;
2014
2015 if (info->xmit_fifo_size == 0)
2016 return; /* Just in case.... */
2017
2018 orig_jiffies = jiffies;
2019 /*
2020 * Set the check interval to be 1/5 of the estimated time to
2021 * send a single character, and make it at least 1. The check
2022 * interval should also be less than the timeout.
2023 *
2024 * Note: we have to use pretty tight timings here to satisfy
2025 * the NIST-PCTS.
2026 */
2027 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2028 char_time = char_time / 5;
2029 if (char_time == 0)
2030 char_time = 1;
2031 if (timeout && timeout < char_time)
2032 char_time = timeout;
2033 /*
2034 * If the transmitter hasn't cleared in twice the approximate
2035 * amount of time to send the entire FIFO, it probably won't
2036 * ever clear. This assumes the UART isn't doing flow
2037 * control, which is currently the case. Hence, if it ever
2038 * takes longer than info->timeout, this is probably due to a
2039 * UART bug of some kind. So, we clamp the timeout parameter at
2040 * 2*info->timeout.
2041 */
2042 if (!timeout || timeout > 2 * info->timeout)
2043 timeout = 2 * info->timeout;
2044 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2045 printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
2046 timeout, char_time);
2047 printk("jiff=%lu...", jiffies);
2048 #endif
2049 while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
2050 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2051 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
2052 #endif
2053 schedule_timeout_interruptible(char_time);
2054 if (signal_pending(current))
2055 break;
2056 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2057 break;
2058 }
2059 set_current_state(TASK_RUNNING);
2060
2061 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2062 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
2063 #endif
2064 }
2065
2066 /*
2067 * This routine is called by tty_hangup() when a hangup is signaled.
2068 */
2069 void mxser_hangup(struct tty_struct *tty)
2070 {
2071 struct mxser_port *info = tty->driver_data;
2072
2073 mxser_flush_buffer(tty);
2074 mxser_shutdown(info);
2075 info->event = 0;
2076 info->count = 0;
2077 info->flags &= ~ASYNC_NORMAL_ACTIVE;
2078 info->tty = NULL;
2079 wake_up_interruptible(&info->open_wait);
2080 }
2081
2082 /*
2083 * mxser_rs_break() --- routine which turns the break handling on or off
2084 */
2085 static void mxser_rs_break(struct tty_struct *tty, int break_state)
2086 {
2087 struct mxser_port *info = tty->driver_data;
2088 unsigned long flags;
2089
2090 spin_lock_irqsave(&info->slock, flags);
2091 if (break_state == -1)
2092 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2093 info->ioaddr + UART_LCR);
2094 else
2095 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2096 info->ioaddr + UART_LCR);
2097 spin_unlock_irqrestore(&info->slock, flags);
2098 }
2099
2100 static void mxser_receive_chars(struct mxser_port *port, int *status)
2101 {
2102 struct tty_struct *tty = port->tty;
2103 unsigned char ch, gdl;
2104 int ignored = 0;
2105 int cnt = 0;
2106 int recv_room;
2107 int max = 256;
2108 unsigned long flags;
2109
2110 spin_lock_irqsave(&port->slock, flags);
2111
2112 recv_room = tty->receive_room;
2113 if ((recv_room == 0) && (!port->ldisc_stop_rx))
2114 mxser_stoprx(tty);
2115
2116 if (port->board->chip_flag != MOXA_OTHER_UART) {
2117
2118 if (*status & UART_LSR_SPECIAL)
2119 goto intr_old;
2120 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2121 (*status & MOXA_MUST_LSR_RERR))
2122 goto intr_old;
2123 if (*status & MOXA_MUST_LSR_RERR)
2124 goto intr_old;
2125
2126 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2127
2128 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2129 gdl &= MOXA_MUST_GDL_MASK;
2130 if (gdl >= recv_room) {
2131 if (!port->ldisc_stop_rx)
2132 mxser_stoprx(tty);
2133 }
2134 while (gdl--) {
2135 ch = inb(port->ioaddr + UART_RX);
2136 tty_insert_flip_char(tty, ch, 0);
2137 cnt++;
2138 }
2139 goto end_intr;
2140 }
2141 intr_old:
2142
2143 do {
2144 if (max-- < 0)
2145 break;
2146
2147 ch = inb(port->ioaddr + UART_RX);
2148 if (port->board->chip_flag && (*status & UART_LSR_OE))
2149 outb(0x23, port->ioaddr + UART_FCR);
2150 *status &= port->read_status_mask;
2151 if (*status & port->ignore_status_mask) {
2152 if (++ignored > 100)
2153 break;
2154 } else {
2155 char flag = 0;
2156 if (*status & UART_LSR_SPECIAL) {
2157 if (*status & UART_LSR_BI) {
2158 flag = TTY_BREAK;
2159 port->icount.brk++;
2160
2161 if (port->flags & ASYNC_SAK)
2162 do_SAK(tty);
2163 } else if (*status & UART_LSR_PE) {
2164 flag = TTY_PARITY;
2165 port->icount.parity++;
2166 } else if (*status & UART_LSR_FE) {
2167 flag = TTY_FRAME;
2168 port->icount.frame++;
2169 } else if (*status & UART_LSR_OE) {
2170 flag = TTY_OVERRUN;
2171 port->icount.overrun++;
2172 }
2173 }
2174 tty_insert_flip_char(tty, ch, flag);
2175 cnt++;
2176 if (cnt >= recv_room) {
2177 if (!port->ldisc_stop_rx)
2178 mxser_stoprx(tty);
2179 break;
2180 }
2181
2182 }
2183
2184 if (port->board->chip_flag)
2185 break;
2186
2187 *status = inb(port->ioaddr + UART_LSR);
2188 } while (*status & UART_LSR_DR);
2189
2190 end_intr:
2191 mxvar_log.rxcnt[port->tty->index] += cnt;
2192 port->mon_data.rxcnt += cnt;
2193 port->mon_data.up_rxcnt += cnt;
2194 spin_unlock_irqrestore(&port->slock, flags);
2195
2196 tty_flip_buffer_push(tty);
2197 }
2198
2199 static void mxser_transmit_chars(struct mxser_port *port)
2200 {
2201 int count, cnt;
2202 unsigned long flags;
2203
2204 spin_lock_irqsave(&port->slock, flags);
2205
2206 if (port->x_char) {
2207 outb(port->x_char, port->ioaddr + UART_TX);
2208 port->x_char = 0;
2209 mxvar_log.txcnt[port->tty->index]++;
2210 port->mon_data.txcnt++;
2211 port->mon_data.up_txcnt++;
2212 port->icount.tx++;
2213 goto unlock;
2214 }
2215
2216 if (port->xmit_buf == 0)
2217 goto unlock;
2218
2219 if ((port->xmit_cnt <= 0) || port->tty->stopped ||
2220 (port->tty->hw_stopped &&
2221 (port->type != PORT_16550A) &&
2222 (!port->board->chip_flag))) {
2223 port->IER &= ~UART_IER_THRI;
2224 outb(port->IER, port->ioaddr + UART_IER);
2225 goto unlock;
2226 }
2227
2228 cnt = port->xmit_cnt;
2229 count = port->xmit_fifo_size;
2230 do {
2231 outb(port->xmit_buf[port->xmit_tail++],
2232 port->ioaddr + UART_TX);
2233 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2234 if (--port->xmit_cnt <= 0)
2235 break;
2236 } while (--count > 0);
2237 mxvar_log.txcnt[port->tty->index] += (cnt - port->xmit_cnt);
2238
2239 port->mon_data.txcnt += (cnt - port->xmit_cnt);
2240 port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2241 port->icount.tx += (cnt - port->xmit_cnt);
2242
2243 if (port->xmit_cnt < WAKEUP_CHARS) {
2244 set_bit(MXSER_EVENT_TXLOW, &port->event);
2245 schedule_work(&port->tqueue);
2246 }
2247 if (port->xmit_cnt <= 0) {
2248 port->IER &= ~UART_IER_THRI;
2249 outb(port->IER, port->ioaddr + UART_IER);
2250 }
2251 unlock:
2252 spin_unlock_irqrestore(&port->slock, flags);
2253 }
2254
2255 /*
2256 * This is the serial driver's generic interrupt routine
2257 */
2258 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2259 {
2260 int status, iir, i;
2261 struct mxser_board *brd = NULL;
2262 struct mxser_port *port;
2263 int max, irqbits, bits, msr;
2264 int pass_counter = 0;
2265 unsigned int int_cnt;
2266 int handled = IRQ_NONE;
2267
2268 for (i = 0; i < MXSER_BOARDS; i++)
2269 if (dev_id == &mxser_boards[i]) {
2270 brd = dev_id;
2271 break;
2272 }
2273
2274 if (i == MXSER_BOARDS)
2275 goto irq_stop;
2276 if (brd == NULL)
2277 goto irq_stop;
2278 max = brd->info->nports;
2279 while (1) {
2280 irqbits = inb(brd->vector) & brd->vector_mask;
2281 if (irqbits == brd->vector_mask)
2282 break;
2283
2284 handled = IRQ_HANDLED;
2285 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2286 if (irqbits == brd->vector_mask)
2287 break;
2288 if (bits & irqbits)
2289 continue;
2290 port = &brd->ports[i];
2291
2292 int_cnt = 0;
2293 do {
2294 iir = inb(port->ioaddr + UART_IIR);
2295 if (iir & UART_IIR_NO_INT)
2296 break;
2297 iir &= MOXA_MUST_IIR_MASK;
2298 if (!port->tty) {
2299 status = inb(port->ioaddr + UART_LSR);
2300 outb(0x27, port->ioaddr + UART_FCR);
2301 inb(port->ioaddr + UART_MSR);
2302 break;
2303 }
2304
2305 status = inb(port->ioaddr + UART_LSR);
2306
2307 if (status & UART_LSR_PE)
2308 port->err_shadow |= NPPI_NOTIFY_PARITY;
2309 if (status & UART_LSR_FE)
2310 port->err_shadow |= NPPI_NOTIFY_FRAMING;
2311 if (status & UART_LSR_OE)
2312 port->err_shadow |=
2313 NPPI_NOTIFY_HW_OVERRUN;
2314 if (status & UART_LSR_BI)
2315 port->err_shadow |= NPPI_NOTIFY_BREAK;
2316
2317 if (port->board->chip_flag) {
2318 if (iir == MOXA_MUST_IIR_GDA ||
2319 iir == MOXA_MUST_IIR_RDA ||
2320 iir == MOXA_MUST_IIR_RTO ||
2321 iir == MOXA_MUST_IIR_LSR)
2322 mxser_receive_chars(port,
2323 &status);
2324
2325 } else {
2326 status &= port->read_status_mask;
2327 if (status & UART_LSR_DR)
2328 mxser_receive_chars(port,
2329 &status);
2330 }
2331 msr = inb(port->ioaddr + UART_MSR);
2332 if (msr & UART_MSR_ANY_DELTA)
2333 mxser_check_modem_status(port, msr);
2334
2335 if (port->board->chip_flag) {
2336 if (iir == 0x02 && (status &
2337 UART_LSR_THRE))
2338 mxser_transmit_chars(port);
2339 } else {
2340 if (status & UART_LSR_THRE)
2341 mxser_transmit_chars(port);
2342 }
2343 } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2344 }
2345 if (pass_counter++ > MXSER_ISR_PASS_LIMIT)
2346 break; /* Prevent infinite loops */
2347 }
2348
2349 irq_stop:
2350 return handled;
2351 }
2352
2353 static const struct tty_operations mxser_ops = {
2354 .open = mxser_open,
2355 .close = mxser_close,
2356 .write = mxser_write,
2357 .put_char = mxser_put_char,
2358 .flush_chars = mxser_flush_chars,
2359 .write_room = mxser_write_room,
2360 .chars_in_buffer = mxser_chars_in_buffer,
2361 .flush_buffer = mxser_flush_buffer,
2362 .ioctl = mxser_ioctl,
2363 .throttle = mxser_throttle,
2364 .unthrottle = mxser_unthrottle,
2365 .set_termios = mxser_set_termios,
2366 .stop = mxser_stop,
2367 .start = mxser_start,
2368 .hangup = mxser_hangup,
2369 .break_ctl = mxser_rs_break,
2370 .wait_until_sent = mxser_wait_until_sent,
2371 .tiocmget = mxser_tiocmget,
2372 .tiocmset = mxser_tiocmset,
2373 };
2374
2375 /*
2376 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2377 */
2378
2379 static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev,
2380 unsigned int irq)
2381 {
2382 if (irq)
2383 free_irq(brd->irq, brd);
2384 if (pdev != NULL) { /* PCI */
2385 #ifdef CONFIG_PCI
2386 pci_release_region(pdev, 2);
2387 pci_release_region(pdev, 3);
2388 pci_dev_put(pdev);
2389 #endif
2390 } else {
2391 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2392 release_region(brd->vector, 1);
2393 }
2394 }
2395
2396 static int __devinit mxser_initbrd(struct mxser_board *brd,
2397 struct pci_dev *pdev)
2398 {
2399 struct mxser_port *info;
2400 unsigned int i;
2401 int retval;
2402
2403 printk(KERN_INFO "max. baud rate = %d bps.\n", brd->ports[0].max_baud);
2404
2405 for (i = 0; i < brd->info->nports; i++) {
2406 info = &brd->ports[i];
2407 info->board = brd;
2408 info->stop_rx = 0;
2409 info->ldisc_stop_rx = 0;
2410
2411 /* Enhance mode enabled here */
2412 if (brd->chip_flag != MOXA_OTHER_UART)
2413 ENABLE_MOXA_MUST_ENCHANCE_MODE(info->ioaddr);
2414
2415 info->flags = ASYNC_SHARE_IRQ;
2416 info->type = brd->uart_type;
2417
2418 process_txrx_fifo(info);
2419
2420 info->custom_divisor = info->baud_base * 16;
2421 info->close_delay = 5 * HZ / 10;
2422 info->closing_wait = 30 * HZ;
2423 INIT_WORK(&info->tqueue, mxser_do_softint);
2424 info->normal_termios = mxvar_sdriver->init_termios;
2425 init_waitqueue_head(&info->open_wait);
2426 init_waitqueue_head(&info->close_wait);
2427 init_waitqueue_head(&info->delta_msr_wait);
2428 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2429 info->err_shadow = 0;
2430 spin_lock_init(&info->slock);
2431
2432 /* before set INT ISR, disable all int */
2433 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2434 info->ioaddr + UART_IER);
2435 }
2436 /*
2437 * Allocate the IRQ if necessary
2438 */
2439
2440 retval = request_irq(brd->irq, mxser_interrupt,
2441 (brd->ports[0].flags & ASYNC_SHARE_IRQ) ? IRQF_SHARED :
2442 IRQF_DISABLED, "mxser", brd);
2443 if (retval) {
2444 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2445 "conflict with another device.\n",
2446 brd->info->name, brd->irq);
2447 /* We hold resources, we need to release them. */
2448 mxser_release_res(brd, pdev, 0);
2449 return retval;
2450 }
2451 return 0;
2452 }
2453
2454 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2455 {
2456 int id, i, bits;
2457 unsigned short regs[16], irq;
2458 unsigned char scratch, scratch2;
2459
2460 brd->chip_flag = MOXA_OTHER_UART;
2461
2462 id = mxser_read_register(cap, regs);
2463 switch (id) {
2464 case C168_ASIC_ID:
2465 brd->info = &mxser_cards[0];
2466 break;
2467 case C104_ASIC_ID:
2468 brd->info = &mxser_cards[1];
2469 break;
2470 case CI104J_ASIC_ID:
2471 brd->info = &mxser_cards[2];
2472 break;
2473 case C102_ASIC_ID:
2474 brd->info = &mxser_cards[5];
2475 break;
2476 case CI132_ASIC_ID:
2477 brd->info = &mxser_cards[6];
2478 break;
2479 case CI134_ASIC_ID:
2480 brd->info = &mxser_cards[7];
2481 break;
2482 default:
2483 return 0;
2484 }
2485
2486 irq = 0;
2487 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2488 Flag-hack checks if configuration should be read as 2-port here. */
2489 if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2490 irq = regs[9] & 0xF000;
2491 irq = irq | (irq >> 4);
2492 if (irq != (regs[9] & 0xFF00))
2493 return MXSER_ERR_IRQ_CONFLIT;
2494 } else if (brd->info->nports == 4) {
2495 irq = regs[9] & 0xF000;
2496 irq = irq | (irq >> 4);
2497 irq = irq | (irq >> 8);
2498 if (irq != regs[9])
2499 return MXSER_ERR_IRQ_CONFLIT;
2500 } else if (brd->info->nports == 8) {
2501 irq = regs[9] & 0xF000;
2502 irq = irq | (irq >> 4);
2503 irq = irq | (irq >> 8);
2504 if ((irq != regs[9]) || (irq != regs[10]))
2505 return MXSER_ERR_IRQ_CONFLIT;
2506 }
2507
2508 if (!irq)
2509 return MXSER_ERR_IRQ;
2510 brd->irq = ((int)(irq & 0xF000) >> 12);
2511 for (i = 0; i < 8; i++)
2512 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2513 if ((regs[12] & 0x80) == 0)
2514 return MXSER_ERR_VECTOR;
2515 brd->vector = (int)regs[11]; /* interrupt vector */
2516 if (id == 1)
2517 brd->vector_mask = 0x00FF;
2518 else
2519 brd->vector_mask = 0x000F;
2520 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2521 if (regs[12] & bits) {
2522 brd->ports[i].baud_base = 921600;
2523 brd->ports[i].max_baud = 921600;
2524 } else {
2525 brd->ports[i].baud_base = 115200;
2526 brd->ports[i].max_baud = 115200;
2527 }
2528 }
2529 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2530 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2531 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
2532 outb(scratch2, cap + UART_LCR);
2533 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2534 scratch = inb(cap + UART_IIR);
2535
2536 if (scratch & 0xC0)
2537 brd->uart_type = PORT_16550A;
2538 else
2539 brd->uart_type = PORT_16450;
2540 if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2541 "mxser(IO)"))
2542 return MXSER_ERR_IOADDR;
2543 if (!request_region(brd->vector, 1, "mxser(vector)")) {
2544 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2545 return MXSER_ERR_VECTOR;
2546 }
2547 return brd->info->nports;
2548 }
2549
2550 static int __devinit mxser_probe(struct pci_dev *pdev,
2551 const struct pci_device_id *ent)
2552 {
2553 #ifdef CONFIG_PCI
2554 struct mxser_board *brd;
2555 unsigned int i, j;
2556 unsigned long ioaddress;
2557 int retval = -EINVAL;
2558
2559 for (i = 0; i < MXSER_BOARDS; i++)
2560 if (mxser_boards[i].info == NULL)
2561 break;
2562
2563 if (i >= MXSER_BOARDS) {
2564 printk(KERN_ERR "Too many Smartio/Industio family boards found "
2565 "(maximum %d), board not configured\n", MXSER_BOARDS);
2566 goto err;
2567 }
2568
2569 brd = &mxser_boards[i];
2570 brd->idx = i * MXSER_PORTS_PER_BOARD;
2571 printk(KERN_INFO "Found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2572 mxser_cards[ent->driver_data].name,
2573 pdev->bus->number, PCI_SLOT(pdev->devfn));
2574
2575 retval = pci_enable_device(pdev);
2576 if (retval) {
2577 printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
2578 goto err;
2579 }
2580
2581 /* io address */
2582 ioaddress = pci_resource_start(pdev, 2);
2583 retval = pci_request_region(pdev, 2, "mxser(IO)");
2584 if (retval)
2585 goto err;
2586
2587 brd->info = &mxser_cards[ent->driver_data];
2588 for (i = 0; i < brd->info->nports; i++)
2589 brd->ports[i].ioaddr = ioaddress + 8 * i;
2590
2591 /* vector */
2592 ioaddress = pci_resource_start(pdev, 3);
2593 retval = pci_request_region(pdev, 3, "mxser(vector)");
2594 if (retval)
2595 goto err_relio;
2596 brd->vector = ioaddress;
2597
2598 /* irq */
2599 brd->irq = pdev->irq;
2600
2601 brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2602 brd->uart_type = PORT_16550A;
2603 brd->vector_mask = 0;
2604
2605 for (i = 0; i < brd->info->nports; i++) {
2606 for (j = 0; j < UART_INFO_NUM; j++) {
2607 if (Gpci_uart_info[j].type == brd->chip_flag) {
2608 brd->ports[i].max_baud =
2609 Gpci_uart_info[j].max_baud;
2610
2611 /* exception....CP-102 */
2612 if (brd->info->flags & MXSER_HIGHBAUD)
2613 brd->ports[i].max_baud = 921600;
2614 break;
2615 }
2616 }
2617 }
2618
2619 if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2620 for (i = 0; i < brd->info->nports; i++) {
2621 if (i < 4)
2622 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2623 else
2624 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2625 }
2626 outb(0, ioaddress + 4); /* default set to RS232 mode */
2627 outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
2628 }
2629
2630 for (i = 0; i < brd->info->nports; i++) {
2631 brd->vector_mask |= (1 << i);
2632 brd->ports[i].baud_base = 921600;
2633 }
2634
2635 /* mxser_initbrd will hook ISR. */
2636 if (mxser_initbrd(brd, pdev) < 0)
2637 goto err_relvec;
2638
2639 for (i = 0; i < brd->info->nports; i++)
2640 tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
2641
2642 pci_set_drvdata(pdev, brd);
2643
2644 return 0;
2645 err_relvec:
2646 pci_release_region(pdev, 3);
2647 err_relio:
2648 pci_release_region(pdev, 2);
2649 brd->info = NULL;
2650 err:
2651 return retval;
2652 #else
2653 return -ENODEV;
2654 #endif
2655 }
2656
2657 static void __devexit mxser_remove(struct pci_dev *pdev)
2658 {
2659 struct mxser_board *brd = pci_get_drvdata(pdev);
2660 unsigned int i;
2661
2662 for (i = 0; i < brd->info->nports; i++)
2663 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2664
2665 mxser_release_res(brd, pdev, 1);
2666 }
2667
2668 static struct pci_driver mxser_driver = {
2669 .name = "mxser",
2670 .id_table = mxser_pcibrds,
2671 .probe = mxser_probe,
2672 .remove = __devexit_p(mxser_remove)
2673 };
2674
2675 static int __init mxser_module_init(void)
2676 {
2677 struct mxser_board *brd;
2678 unsigned long cap;
2679 unsigned int i, m, isaloop;
2680 int retval, b;
2681
2682 pr_debug("Loading module mxser ...\n");
2683
2684 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2685 if (!mxvar_sdriver)
2686 return -ENOMEM;
2687 spin_lock_init(&gm_lock);
2688
2689 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2690 MXSER_VERSION);
2691
2692 /* Initialize the tty_driver structure */
2693 mxvar_sdriver->owner = THIS_MODULE;
2694 mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
2695 mxvar_sdriver->name = "ttyMI";
2696 mxvar_sdriver->major = ttymajor;
2697 mxvar_sdriver->minor_start = 0;
2698 mxvar_sdriver->num = MXSER_PORTS + 1;
2699 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2700 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2701 mxvar_sdriver->init_termios = tty_std_termios;
2702 mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2703 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2704 tty_set_operations(mxvar_sdriver, &mxser_ops);
2705
2706 retval = tty_register_driver(mxvar_sdriver);
2707 if (retval) {
2708 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2709 "tty driver !\n");
2710 goto err_put;
2711 }
2712
2713 mxvar_diagflag = 0;
2714
2715 m = 0;
2716 /* Start finding ISA boards here */
2717 for (isaloop = 0; isaloop < 2; isaloop++)
2718 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
2719 if (!isaloop)
2720 cap = mxserBoardCAP[b]; /* predefined */
2721 else
2722 cap = ioaddr[b]; /* module param */
2723
2724 if (!cap)
2725 continue;
2726
2727 brd = &mxser_boards[m];
2728 retval = mxser_get_ISA_conf(cap, brd);
2729
2730 if (retval != 0)
2731 printk(KERN_INFO "Found MOXA %s board "
2732 "(CAP=0x%x)\n",
2733 brd->info->name, ioaddr[b]);
2734
2735 if (retval <= 0) {
2736 if (retval == MXSER_ERR_IRQ)
2737 printk(KERN_ERR "Invalid interrupt "
2738 "number, board not "
2739 "configured\n");
2740 else if (retval == MXSER_ERR_IRQ_CONFLIT)
2741 printk(KERN_ERR "Invalid interrupt "
2742 "number, board not "
2743 "configured\n");
2744 else if (retval == MXSER_ERR_VECTOR)
2745 printk(KERN_ERR "Invalid interrupt "
2746 "vector, board not "
2747 "configured\n");
2748 else if (retval == MXSER_ERR_IOADDR)
2749 printk(KERN_ERR "Invalid I/O address, "
2750 "board not configured\n");
2751
2752 brd->info = NULL;
2753 continue;
2754 }
2755
2756 /* mxser_initbrd will hook ISR. */
2757 if (mxser_initbrd(brd, NULL) < 0) {
2758 brd->info = NULL;
2759 continue;
2760 }
2761
2762 brd->idx = m * MXSER_PORTS_PER_BOARD;
2763 for (i = 0; i < brd->info->nports; i++)
2764 tty_register_device(mxvar_sdriver, brd->idx + i,
2765 NULL);
2766
2767 m++;
2768 }
2769
2770 retval = pci_register_driver(&mxser_driver);
2771 if (retval) {
2772 printk(KERN_ERR "Can't register pci driver\n");
2773 if (!m) {
2774 retval = -ENODEV;
2775 goto err_unr;
2776 } /* else: we have some ISA cards under control */
2777 }
2778
2779 pr_debug("Done.\n");
2780
2781 return 0;
2782 err_unr:
2783 tty_unregister_driver(mxvar_sdriver);
2784 err_put:
2785 put_tty_driver(mxvar_sdriver);
2786 return retval;
2787 }
2788
2789 static void __exit mxser_module_exit(void)
2790 {
2791 unsigned int i, j;
2792
2793 pr_debug("Unloading module mxser ...\n");
2794
2795 pci_unregister_driver(&mxser_driver);
2796
2797 for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2798 if (mxser_boards[i].info != NULL)
2799 for (j = 0; j < mxser_boards[i].info->nports; j++)
2800 tty_unregister_device(mxvar_sdriver,
2801 mxser_boards[i].idx + j);
2802 tty_unregister_driver(mxvar_sdriver);
2803 put_tty_driver(mxvar_sdriver);
2804
2805 for (i = 0; i < MXSER_BOARDS; i++)
2806 if (mxser_boards[i].info != NULL)
2807 mxser_release_res(&mxser_boards[i], NULL, 1);
2808
2809 pr_debug("Done.\n");
2810 }
2811
2812 module_init(mxser_module_init);
2813 module_exit(mxser_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree