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Merge 4.5-rc2 into tty-next
[deliverable/linux.git] / drivers / tty / mxser.c
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@lxorguk.ukuu.org.uk>. The original 1.8 code is available on
18 * www.moxa.com.
19 * - Fixed x86_64 cleanness
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/ioport.h>
37 #include <linux/mm.h>
38 #include <linux/delay.h>
39 #include <linux/pci.h>
40 #include <linux/bitops.h>
41 #include <linux/slab.h>
42 #include <linux/ratelimit.h>
43
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 "2.0.5" /* 1.14 */
51 #define MXSERMAJOR 174
52
53 #define MXSER_BOARDS 4 /* Max. boards */
54 #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
55 #define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
56 #define MXSER_ISR_PASS_LIMIT 100
57
58 /*CheckIsMoxaMust return value*/
59 #define MOXA_OTHER_UART 0x00
60 #define MOXA_MUST_MU150_HWID 0x01
61 #define MOXA_MUST_MU860_HWID 0x02
62
63 #define WAKEUP_CHARS 256
64
65 #define UART_MCR_AFE 0x20
66 #define UART_LSR_SPECIAL 0x1E
67
68 #define PCI_DEVICE_ID_POS104UL 0x1044
69 #define PCI_DEVICE_ID_CB108 0x1080
70 #define PCI_DEVICE_ID_CP102UF 0x1023
71 #define PCI_DEVICE_ID_CP112UL 0x1120
72 #define PCI_DEVICE_ID_CB114 0x1142
73 #define PCI_DEVICE_ID_CP114UL 0x1143
74 #define PCI_DEVICE_ID_CB134I 0x1341
75 #define PCI_DEVICE_ID_CP138U 0x1380
76
77
78 #define C168_ASIC_ID 1
79 #define C104_ASIC_ID 2
80 #define C102_ASIC_ID 0xB
81 #define CI132_ASIC_ID 4
82 #define CI134_ASIC_ID 3
83 #define CI104J_ASIC_ID 5
84
85 #define MXSER_HIGHBAUD 1
86 #define MXSER_HAS2 2
87
88 /* This is only for PCI */
89 static const struct {
90 int type;
91 int tx_fifo;
92 int rx_fifo;
93 int xmit_fifo_size;
94 int rx_high_water;
95 int rx_trigger;
96 int rx_low_water;
97 long max_baud;
98 } Gpci_uart_info[] = {
99 {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
100 {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
101 {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
102 };
103 #define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info)
104
105 struct mxser_cardinfo {
106 char *name;
107 unsigned int nports;
108 unsigned int flags;
109 };
110
111 static const struct mxser_cardinfo mxser_cards[] = {
112 /* 0*/ { "C168 series", 8, },
113 { "C104 series", 4, },
114 { "CI-104J series", 4, },
115 { "C168H/PCI series", 8, },
116 { "C104H/PCI series", 4, },
117 /* 5*/ { "C102 series", 4, MXSER_HAS2 }, /* C102-ISA */
118 { "CI-132 series", 4, MXSER_HAS2 },
119 { "CI-134 series", 4, },
120 { "CP-132 series", 2, },
121 { "CP-114 series", 4, },
122 /*10*/ { "CT-114 series", 4, },
123 { "CP-102 series", 2, MXSER_HIGHBAUD },
124 { "CP-104U series", 4, },
125 { "CP-168U series", 8, },
126 { "CP-132U series", 2, },
127 /*15*/ { "CP-134U series", 4, },
128 { "CP-104JU series", 4, },
129 { "Moxa UC7000 Serial", 8, }, /* RC7000 */
130 { "CP-118U series", 8, },
131 { "CP-102UL series", 2, },
132 /*20*/ { "CP-102U series", 2, },
133 { "CP-118EL series", 8, },
134 { "CP-168EL series", 8, },
135 { "CP-104EL series", 4, },
136 { "CB-108 series", 8, },
137 /*25*/ { "CB-114 series", 4, },
138 { "CB-134I series", 4, },
139 { "CP-138U series", 8, },
140 { "POS-104UL series", 4, },
141 { "CP-114UL series", 4, },
142 /*30*/ { "CP-102UF series", 2, },
143 { "CP-112UL series", 2, },
144 };
145
146 /* driver_data correspond to the lines in the structure above
147 see also ISA probe function before you change something */
148 static struct pci_device_id mxser_pcibrds[] = {
149 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168), .driver_data = 3 },
150 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104), .driver_data = 4 },
151 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132), .driver_data = 8 },
152 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114), .driver_data = 9 },
153 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114), .driver_data = 10 },
154 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102), .driver_data = 11 },
155 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 },
156 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 },
157 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 },
158 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 },
159 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 },
160 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 },
161 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 },
162 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 },
163 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 },
164 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 },
165 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 },
166 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 },
167 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108), .driver_data = 24 },
168 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114), .driver_data = 25 },
169 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I), .driver_data = 26 },
170 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U), .driver_data = 27 },
171 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL), .driver_data = 28 },
172 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL), .driver_data = 29 },
173 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP102UF), .driver_data = 30 },
174 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP112UL), .driver_data = 31 },
175 { }
176 };
177 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
178
179 static unsigned long ioaddr[MXSER_BOARDS];
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, ulong, NULL, 0);
187 MODULE_PARM_DESC(ioaddr, "ISA io addresses to look for a moxa board");
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 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 tty_port port;
226 struct mxser_board *board;
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
238 int x_char; /* xon/xoff character */
239 int IER; /* Interrupt Enable Register */
240 int MCR; /* Modem control register */
241
242 unsigned char stop_rx;
243 unsigned char ldisc_stop_rx;
244
245 int custom_divisor;
246 unsigned char err_shadow;
247
248 struct async_icount icount; /* kernel counters for 4 input interrupts */
249 int timeout;
250
251 int read_status_mask;
252 int ignore_status_mask;
253 int xmit_fifo_size;
254 int xmit_head;
255 int xmit_tail;
256 int xmit_cnt;
257 int closing;
258
259 struct ktermios normal_termios;
260
261 struct mxser_mon mon_data;
262
263 spinlock_t slock;
264 };
265
266 struct mxser_board {
267 unsigned int idx;
268 int irq;
269 const struct mxser_cardinfo *info;
270 unsigned long vector;
271 unsigned long vector_mask;
272
273 int chip_flag;
274 int uart_type;
275
276 struct mxser_port ports[MXSER_PORTS_PER_BOARD];
277 };
278
279 struct mxser_mstatus {
280 tcflag_t cflag;
281 int cts;
282 int dsr;
283 int ri;
284 int dcd;
285 };
286
287 static struct mxser_board mxser_boards[MXSER_BOARDS];
288 static struct tty_driver *mxvar_sdriver;
289 static struct mxser_log mxvar_log;
290 static int mxser_set_baud_method[MXSER_PORTS + 1];
291
292 static void mxser_enable_must_enchance_mode(unsigned long baseio)
293 {
294 u8 oldlcr;
295 u8 efr;
296
297 oldlcr = inb(baseio + UART_LCR);
298 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
299
300 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
301 efr |= MOXA_MUST_EFR_EFRB_ENABLE;
302
303 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
304 outb(oldlcr, baseio + UART_LCR);
305 }
306
307 #ifdef CONFIG_PCI
308 static void mxser_disable_must_enchance_mode(unsigned long baseio)
309 {
310 u8 oldlcr;
311 u8 efr;
312
313 oldlcr = inb(baseio + UART_LCR);
314 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
315
316 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
317 efr &= ~MOXA_MUST_EFR_EFRB_ENABLE;
318
319 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
320 outb(oldlcr, baseio + UART_LCR);
321 }
322 #endif
323
324 static void mxser_set_must_xon1_value(unsigned long baseio, u8 value)
325 {
326 u8 oldlcr;
327 u8 efr;
328
329 oldlcr = inb(baseio + UART_LCR);
330 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
331
332 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
333 efr &= ~MOXA_MUST_EFR_BANK_MASK;
334 efr |= MOXA_MUST_EFR_BANK0;
335
336 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
337 outb(value, baseio + MOXA_MUST_XON1_REGISTER);
338 outb(oldlcr, baseio + UART_LCR);
339 }
340
341 static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value)
342 {
343 u8 oldlcr;
344 u8 efr;
345
346 oldlcr = inb(baseio + UART_LCR);
347 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
348
349 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
350 efr &= ~MOXA_MUST_EFR_BANK_MASK;
351 efr |= MOXA_MUST_EFR_BANK0;
352
353 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
354 outb(value, baseio + MOXA_MUST_XOFF1_REGISTER);
355 outb(oldlcr, baseio + UART_LCR);
356 }
357
358 static void mxser_set_must_fifo_value(struct mxser_port *info)
359 {
360 u8 oldlcr;
361 u8 efr;
362
363 oldlcr = inb(info->ioaddr + UART_LCR);
364 outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR);
365
366 efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER);
367 efr &= ~MOXA_MUST_EFR_BANK_MASK;
368 efr |= MOXA_MUST_EFR_BANK1;
369
370 outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER);
371 outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER);
372 outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER);
373 outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER);
374 outb(oldlcr, info->ioaddr + UART_LCR);
375 }
376
377 static void mxser_set_must_enum_value(unsigned long baseio, u8 value)
378 {
379 u8 oldlcr;
380 u8 efr;
381
382 oldlcr = inb(baseio + UART_LCR);
383 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
384
385 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
386 efr &= ~MOXA_MUST_EFR_BANK_MASK;
387 efr |= MOXA_MUST_EFR_BANK2;
388
389 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
390 outb(value, baseio + MOXA_MUST_ENUM_REGISTER);
391 outb(oldlcr, baseio + UART_LCR);
392 }
393
394 #ifdef CONFIG_PCI
395 static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId)
396 {
397 u8 oldlcr;
398 u8 efr;
399
400 oldlcr = inb(baseio + UART_LCR);
401 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
402
403 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
404 efr &= ~MOXA_MUST_EFR_BANK_MASK;
405 efr |= MOXA_MUST_EFR_BANK2;
406
407 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
408 *pId = inb(baseio + MOXA_MUST_HWID_REGISTER);
409 outb(oldlcr, baseio + UART_LCR);
410 }
411 #endif
412
413 static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio)
414 {
415 u8 oldlcr;
416 u8 efr;
417
418 oldlcr = inb(baseio + UART_LCR);
419 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
420
421 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
422 efr &= ~MOXA_MUST_EFR_SF_MASK;
423
424 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
425 outb(oldlcr, baseio + UART_LCR);
426 }
427
428 static void mxser_enable_must_tx_software_flow_control(unsigned long baseio)
429 {
430 u8 oldlcr;
431 u8 efr;
432
433 oldlcr = inb(baseio + UART_LCR);
434 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
435
436 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
437 efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
438 efr |= MOXA_MUST_EFR_SF_TX1;
439
440 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
441 outb(oldlcr, baseio + UART_LCR);
442 }
443
444 static void mxser_disable_must_tx_software_flow_control(unsigned long baseio)
445 {
446 u8 oldlcr;
447 u8 efr;
448
449 oldlcr = inb(baseio + UART_LCR);
450 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
451
452 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
453 efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
454
455 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
456 outb(oldlcr, baseio + UART_LCR);
457 }
458
459 static void mxser_enable_must_rx_software_flow_control(unsigned long baseio)
460 {
461 u8 oldlcr;
462 u8 efr;
463
464 oldlcr = inb(baseio + UART_LCR);
465 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
466
467 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
468 efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
469 efr |= MOXA_MUST_EFR_SF_RX1;
470
471 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
472 outb(oldlcr, baseio + UART_LCR);
473 }
474
475 static void mxser_disable_must_rx_software_flow_control(unsigned long baseio)
476 {
477 u8 oldlcr;
478 u8 efr;
479
480 oldlcr = inb(baseio + UART_LCR);
481 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
482
483 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
484 efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
485
486 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
487 outb(oldlcr, baseio + UART_LCR);
488 }
489
490 #ifdef CONFIG_PCI
491 static int CheckIsMoxaMust(unsigned long io)
492 {
493 u8 oldmcr, hwid;
494 int i;
495
496 outb(0, io + UART_LCR);
497 mxser_disable_must_enchance_mode(io);
498 oldmcr = inb(io + UART_MCR);
499 outb(0, io + UART_MCR);
500 mxser_set_must_xon1_value(io, 0x11);
501 if ((hwid = inb(io + UART_MCR)) != 0) {
502 outb(oldmcr, io + UART_MCR);
503 return MOXA_OTHER_UART;
504 }
505
506 mxser_get_must_hardware_id(io, &hwid);
507 for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
508 if (hwid == Gpci_uart_info[i].type)
509 return (int)hwid;
510 }
511 return MOXA_OTHER_UART;
512 }
513 #endif
514
515 static void process_txrx_fifo(struct mxser_port *info)
516 {
517 int i;
518
519 if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
520 info->rx_trigger = 1;
521 info->rx_high_water = 1;
522 info->rx_low_water = 1;
523 info->xmit_fifo_size = 1;
524 } else
525 for (i = 0; i < UART_INFO_NUM; i++)
526 if (info->board->chip_flag == Gpci_uart_info[i].type) {
527 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
528 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
529 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
530 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
531 break;
532 }
533 }
534
535 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
536 {
537 static unsigned char mxser_msr[MXSER_PORTS + 1];
538 unsigned char status = 0;
539
540 status = inb(baseaddr + UART_MSR);
541
542 mxser_msr[port] &= 0x0F;
543 mxser_msr[port] |= status;
544 status = mxser_msr[port];
545 if (mode)
546 mxser_msr[port] = 0;
547
548 return status;
549 }
550
551 static int mxser_carrier_raised(struct tty_port *port)
552 {
553 struct mxser_port *mp = container_of(port, struct mxser_port, port);
554 return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0;
555 }
556
557 static void mxser_dtr_rts(struct tty_port *port, int on)
558 {
559 struct mxser_port *mp = container_of(port, struct mxser_port, port);
560 unsigned long flags;
561
562 spin_lock_irqsave(&mp->slock, flags);
563 if (on)
564 outb(inb(mp->ioaddr + UART_MCR) |
565 UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR);
566 else
567 outb(inb(mp->ioaddr + UART_MCR)&~(UART_MCR_DTR | UART_MCR_RTS),
568 mp->ioaddr + UART_MCR);
569 spin_unlock_irqrestore(&mp->slock, flags);
570 }
571
572 static int mxser_set_baud(struct tty_struct *tty, long newspd)
573 {
574 struct mxser_port *info = tty->driver_data;
575 int quot = 0, baud;
576 unsigned char cval;
577
578 if (!info->ioaddr)
579 return -1;
580
581 if (newspd > info->max_baud)
582 return -1;
583
584 if (newspd == 134) {
585 quot = 2 * info->baud_base / 269;
586 tty_encode_baud_rate(tty, 134, 134);
587 } else if (newspd) {
588 quot = info->baud_base / newspd;
589 if (quot == 0)
590 quot = 1;
591 baud = info->baud_base/quot;
592 tty_encode_baud_rate(tty, baud, baud);
593 } else {
594 quot = 0;
595 }
596
597 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
598 info->timeout += HZ / 50; /* Add .02 seconds of slop */
599
600 if (quot) {
601 info->MCR |= UART_MCR_DTR;
602 outb(info->MCR, info->ioaddr + UART_MCR);
603 } else {
604 info->MCR &= ~UART_MCR_DTR;
605 outb(info->MCR, info->ioaddr + UART_MCR);
606 return 0;
607 }
608
609 cval = inb(info->ioaddr + UART_LCR);
610
611 outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
612
613 outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
614 outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
615 outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
616
617 #ifdef BOTHER
618 if (C_BAUD(tty) == BOTHER) {
619 quot = info->baud_base % newspd;
620 quot *= 8;
621 if (quot % newspd > newspd / 2) {
622 quot /= newspd;
623 quot++;
624 } else
625 quot /= newspd;
626
627 mxser_set_must_enum_value(info->ioaddr, quot);
628 } else
629 #endif
630 mxser_set_must_enum_value(info->ioaddr, 0);
631
632 return 0;
633 }
634
635 /*
636 * This routine is called to set the UART divisor registers to match
637 * the specified baud rate for a serial port.
638 */
639 static int mxser_change_speed(struct tty_struct *tty,
640 struct ktermios *old_termios)
641 {
642 struct mxser_port *info = tty->driver_data;
643 unsigned cflag, cval, fcr;
644 int ret = 0;
645 unsigned char status;
646
647 cflag = tty->termios.c_cflag;
648 if (!info->ioaddr)
649 return ret;
650
651 if (mxser_set_baud_method[tty->index] == 0)
652 mxser_set_baud(tty, tty_get_baud_rate(tty));
653
654 /* byte size and parity */
655 switch (cflag & CSIZE) {
656 case CS5:
657 cval = 0x00;
658 break;
659 case CS6:
660 cval = 0x01;
661 break;
662 case CS7:
663 cval = 0x02;
664 break;
665 case CS8:
666 cval = 0x03;
667 break;
668 default:
669 cval = 0x00;
670 break; /* too keep GCC shut... */
671 }
672 if (cflag & CSTOPB)
673 cval |= 0x04;
674 if (cflag & PARENB)
675 cval |= UART_LCR_PARITY;
676 if (!(cflag & PARODD))
677 cval |= UART_LCR_EPAR;
678 if (cflag & CMSPAR)
679 cval |= UART_LCR_SPAR;
680
681 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
682 if (info->board->chip_flag) {
683 fcr = UART_FCR_ENABLE_FIFO;
684 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
685 mxser_set_must_fifo_value(info);
686 } else
687 fcr = 0;
688 } else {
689 fcr = UART_FCR_ENABLE_FIFO;
690 if (info->board->chip_flag) {
691 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
692 mxser_set_must_fifo_value(info);
693 } else {
694 switch (info->rx_trigger) {
695 case 1:
696 fcr |= UART_FCR_TRIGGER_1;
697 break;
698 case 4:
699 fcr |= UART_FCR_TRIGGER_4;
700 break;
701 case 8:
702 fcr |= UART_FCR_TRIGGER_8;
703 break;
704 default:
705 fcr |= UART_FCR_TRIGGER_14;
706 break;
707 }
708 }
709 }
710
711 /* CTS flow control flag and modem status interrupts */
712 info->IER &= ~UART_IER_MSI;
713 info->MCR &= ~UART_MCR_AFE;
714 if (cflag & CRTSCTS) {
715 info->port.flags |= ASYNC_CTS_FLOW;
716 info->IER |= UART_IER_MSI;
717 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
718 info->MCR |= UART_MCR_AFE;
719 } else {
720 status = inb(info->ioaddr + UART_MSR);
721 if (tty->hw_stopped) {
722 if (status & UART_MSR_CTS) {
723 tty->hw_stopped = 0;
724 if (info->type != PORT_16550A &&
725 !info->board->chip_flag) {
726 outb(info->IER & ~UART_IER_THRI,
727 info->ioaddr +
728 UART_IER);
729 info->IER |= UART_IER_THRI;
730 outb(info->IER, info->ioaddr +
731 UART_IER);
732 }
733 tty_wakeup(tty);
734 }
735 } else {
736 if (!(status & UART_MSR_CTS)) {
737 tty->hw_stopped = 1;
738 if ((info->type != PORT_16550A) &&
739 (!info->board->chip_flag)) {
740 info->IER &= ~UART_IER_THRI;
741 outb(info->IER, info->ioaddr +
742 UART_IER);
743 }
744 }
745 }
746 }
747 } else {
748 info->port.flags &= ~ASYNC_CTS_FLOW;
749 }
750 outb(info->MCR, info->ioaddr + UART_MCR);
751 if (cflag & CLOCAL) {
752 info->port.flags &= ~ASYNC_CHECK_CD;
753 } else {
754 info->port.flags |= ASYNC_CHECK_CD;
755 info->IER |= UART_IER_MSI;
756 }
757 outb(info->IER, info->ioaddr + UART_IER);
758
759 /*
760 * Set up parity check flag
761 */
762 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
763 if (I_INPCK(tty))
764 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
765 if (I_BRKINT(tty) || I_PARMRK(tty))
766 info->read_status_mask |= UART_LSR_BI;
767
768 info->ignore_status_mask = 0;
769
770 if (I_IGNBRK(tty)) {
771 info->ignore_status_mask |= UART_LSR_BI;
772 info->read_status_mask |= UART_LSR_BI;
773 /*
774 * If we're ignore parity and break indicators, ignore
775 * overruns too. (For real raw support).
776 */
777 if (I_IGNPAR(tty)) {
778 info->ignore_status_mask |=
779 UART_LSR_OE |
780 UART_LSR_PE |
781 UART_LSR_FE;
782 info->read_status_mask |=
783 UART_LSR_OE |
784 UART_LSR_PE |
785 UART_LSR_FE;
786 }
787 }
788 if (info->board->chip_flag) {
789 mxser_set_must_xon1_value(info->ioaddr, START_CHAR(tty));
790 mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(tty));
791 if (I_IXON(tty)) {
792 mxser_enable_must_rx_software_flow_control(
793 info->ioaddr);
794 } else {
795 mxser_disable_must_rx_software_flow_control(
796 info->ioaddr);
797 }
798 if (I_IXOFF(tty)) {
799 mxser_enable_must_tx_software_flow_control(
800 info->ioaddr);
801 } else {
802 mxser_disable_must_tx_software_flow_control(
803 info->ioaddr);
804 }
805 }
806
807
808 outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
809 outb(cval, info->ioaddr + UART_LCR);
810
811 return ret;
812 }
813
814 static void mxser_check_modem_status(struct tty_struct *tty,
815 struct mxser_port *port, int status)
816 {
817 /* update input line counters */
818 if (status & UART_MSR_TERI)
819 port->icount.rng++;
820 if (status & UART_MSR_DDSR)
821 port->icount.dsr++;
822 if (status & UART_MSR_DDCD)
823 port->icount.dcd++;
824 if (status & UART_MSR_DCTS)
825 port->icount.cts++;
826 port->mon_data.modem_status = status;
827 wake_up_interruptible(&port->port.delta_msr_wait);
828
829 if ((port->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
830 if (status & UART_MSR_DCD)
831 wake_up_interruptible(&port->port.open_wait);
832 }
833
834 if (tty_port_cts_enabled(&port->port)) {
835 if (tty->hw_stopped) {
836 if (status & UART_MSR_CTS) {
837 tty->hw_stopped = 0;
838
839 if ((port->type != PORT_16550A) &&
840 (!port->board->chip_flag)) {
841 outb(port->IER & ~UART_IER_THRI,
842 port->ioaddr + UART_IER);
843 port->IER |= UART_IER_THRI;
844 outb(port->IER, port->ioaddr +
845 UART_IER);
846 }
847 tty_wakeup(tty);
848 }
849 } else {
850 if (!(status & UART_MSR_CTS)) {
851 tty->hw_stopped = 1;
852 if (port->type != PORT_16550A &&
853 !port->board->chip_flag) {
854 port->IER &= ~UART_IER_THRI;
855 outb(port->IER, port->ioaddr +
856 UART_IER);
857 }
858 }
859 }
860 }
861 }
862
863 static int mxser_activate(struct tty_port *port, struct tty_struct *tty)
864 {
865 struct mxser_port *info = container_of(port, struct mxser_port, port);
866 unsigned long page;
867 unsigned long flags;
868
869 page = __get_free_page(GFP_KERNEL);
870 if (!page)
871 return -ENOMEM;
872
873 spin_lock_irqsave(&info->slock, flags);
874
875 if (!info->ioaddr || !info->type) {
876 set_bit(TTY_IO_ERROR, &tty->flags);
877 free_page(page);
878 spin_unlock_irqrestore(&info->slock, flags);
879 return 0;
880 }
881 info->port.xmit_buf = (unsigned char *) page;
882
883 /*
884 * Clear the FIFO buffers and disable them
885 * (they will be reenabled in mxser_change_speed())
886 */
887 if (info->board->chip_flag)
888 outb((UART_FCR_CLEAR_RCVR |
889 UART_FCR_CLEAR_XMIT |
890 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
891 else
892 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
893 info->ioaddr + UART_FCR);
894
895 /*
896 * At this point there's no way the LSR could still be 0xFF;
897 * if it is, then bail out, because there's likely no UART
898 * here.
899 */
900 if (inb(info->ioaddr + UART_LSR) == 0xff) {
901 spin_unlock_irqrestore(&info->slock, flags);
902 if (capable(CAP_SYS_ADMIN)) {
903 set_bit(TTY_IO_ERROR, &tty->flags);
904 return 0;
905 } else
906 return -ENODEV;
907 }
908
909 /*
910 * Clear the interrupt registers.
911 */
912 (void) inb(info->ioaddr + UART_LSR);
913 (void) inb(info->ioaddr + UART_RX);
914 (void) inb(info->ioaddr + UART_IIR);
915 (void) inb(info->ioaddr + UART_MSR);
916
917 /*
918 * Now, initialize the UART
919 */
920 outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
921 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
922 outb(info->MCR, info->ioaddr + UART_MCR);
923
924 /*
925 * Finally, enable interrupts
926 */
927 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
928
929 if (info->board->chip_flag)
930 info->IER |= MOXA_MUST_IER_EGDAI;
931 outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
932
933 /*
934 * And clear the interrupt registers again for luck.
935 */
936 (void) inb(info->ioaddr + UART_LSR);
937 (void) inb(info->ioaddr + UART_RX);
938 (void) inb(info->ioaddr + UART_IIR);
939 (void) inb(info->ioaddr + UART_MSR);
940
941 clear_bit(TTY_IO_ERROR, &tty->flags);
942 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
943
944 /*
945 * and set the speed of the serial port
946 */
947 mxser_change_speed(tty, NULL);
948 spin_unlock_irqrestore(&info->slock, flags);
949
950 return 0;
951 }
952
953 /*
954 * This routine will shutdown a serial port
955 */
956 static void mxser_shutdown_port(struct tty_port *port)
957 {
958 struct mxser_port *info = container_of(port, struct mxser_port, port);
959 unsigned long flags;
960
961 spin_lock_irqsave(&info->slock, flags);
962
963 /*
964 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
965 * here so the queue might never be waken up
966 */
967 wake_up_interruptible(&info->port.delta_msr_wait);
968
969 /*
970 * Free the xmit buffer, if necessary
971 */
972 if (info->port.xmit_buf) {
973 free_page((unsigned long) info->port.xmit_buf);
974 info->port.xmit_buf = NULL;
975 }
976
977 info->IER = 0;
978 outb(0x00, info->ioaddr + UART_IER);
979
980 /* clear Rx/Tx FIFO's */
981 if (info->board->chip_flag)
982 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
983 MOXA_MUST_FCR_GDA_MODE_ENABLE,
984 info->ioaddr + UART_FCR);
985 else
986 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
987 info->ioaddr + UART_FCR);
988
989 /* read data port to reset things */
990 (void) inb(info->ioaddr + UART_RX);
991
992
993 if (info->board->chip_flag)
994 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
995
996 spin_unlock_irqrestore(&info->slock, flags);
997 }
998
999 /*
1000 * This routine is called whenever a serial port is opened. It
1001 * enables interrupts for a serial port, linking in its async structure into
1002 * the IRQ chain. It also performs the serial-specific
1003 * initialization for the tty structure.
1004 */
1005 static int mxser_open(struct tty_struct *tty, struct file *filp)
1006 {
1007 struct mxser_port *info;
1008 int line;
1009
1010 line = tty->index;
1011 if (line == MXSER_PORTS)
1012 return 0;
1013 info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
1014 if (!info->ioaddr)
1015 return -ENODEV;
1016
1017 tty->driver_data = info;
1018 return tty_port_open(&info->port, tty, filp);
1019 }
1020
1021 static void mxser_flush_buffer(struct tty_struct *tty)
1022 {
1023 struct mxser_port *info = tty->driver_data;
1024 char fcr;
1025 unsigned long flags;
1026
1027
1028 spin_lock_irqsave(&info->slock, flags);
1029 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1030
1031 fcr = inb(info->ioaddr + UART_FCR);
1032 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1033 info->ioaddr + UART_FCR);
1034 outb(fcr, info->ioaddr + UART_FCR);
1035
1036 spin_unlock_irqrestore(&info->slock, flags);
1037
1038 tty_wakeup(tty);
1039 }
1040
1041
1042 static void mxser_close_port(struct tty_port *port)
1043 {
1044 struct mxser_port *info = container_of(port, struct mxser_port, port);
1045 unsigned long timeout;
1046 /*
1047 * At this point we stop accepting input. To do this, we
1048 * disable the receive line status interrupts, and tell the
1049 * interrupt driver to stop checking the data ready bit in the
1050 * line status register.
1051 */
1052 info->IER &= ~UART_IER_RLSI;
1053 if (info->board->chip_flag)
1054 info->IER &= ~MOXA_MUST_RECV_ISR;
1055
1056 outb(info->IER, info->ioaddr + UART_IER);
1057 /*
1058 * Before we drop DTR, make sure the UART transmitter
1059 * has completely drained; this is especially
1060 * important if there is a transmit FIFO!
1061 */
1062 timeout = jiffies + HZ;
1063 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1064 schedule_timeout_interruptible(5);
1065 if (time_after(jiffies, timeout))
1066 break;
1067 }
1068 }
1069
1070 /*
1071 * This routine is called when the serial port gets closed. First, we
1072 * wait for the last remaining data to be sent. Then, we unlink its
1073 * async structure from the interrupt chain if necessary, and we free
1074 * that IRQ if nothing is left in the chain.
1075 */
1076 static void mxser_close(struct tty_struct *tty, struct file *filp)
1077 {
1078 struct mxser_port *info = tty->driver_data;
1079 struct tty_port *port = &info->port;
1080
1081 if (tty->index == MXSER_PORTS || info == NULL)
1082 return;
1083 if (tty_port_close_start(port, tty, filp) == 0)
1084 return;
1085 info->closing = 1;
1086 mutex_lock(&port->mutex);
1087 mxser_close_port(port);
1088 mxser_flush_buffer(tty);
1089 if (test_bit(ASYNCB_INITIALIZED, &port->flags)) {
1090 if (C_HUPCL(tty))
1091 tty_port_lower_dtr_rts(port);
1092 }
1093 mxser_shutdown_port(port);
1094 clear_bit(ASYNCB_INITIALIZED, &port->flags);
1095 mutex_unlock(&port->mutex);
1096 info->closing = 0;
1097 /* Right now the tty_port set is done outside of the close_end helper
1098 as we don't yet have everyone using refcounts */
1099 tty_port_close_end(port, tty);
1100 tty_port_tty_set(port, NULL);
1101 }
1102
1103 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1104 {
1105 int c, total = 0;
1106 struct mxser_port *info = tty->driver_data;
1107 unsigned long flags;
1108
1109 if (!info->port.xmit_buf)
1110 return 0;
1111
1112 while (1) {
1113 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1114 SERIAL_XMIT_SIZE - info->xmit_head));
1115 if (c <= 0)
1116 break;
1117
1118 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
1119 spin_lock_irqsave(&info->slock, flags);
1120 info->xmit_head = (info->xmit_head + c) &
1121 (SERIAL_XMIT_SIZE - 1);
1122 info->xmit_cnt += c;
1123 spin_unlock_irqrestore(&info->slock, flags);
1124
1125 buf += c;
1126 count -= c;
1127 total += c;
1128 }
1129
1130 if (info->xmit_cnt && !tty->stopped) {
1131 if (!tty->hw_stopped ||
1132 (info->type == PORT_16550A) ||
1133 (info->board->chip_flag)) {
1134 spin_lock_irqsave(&info->slock, flags);
1135 outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1136 UART_IER);
1137 info->IER |= UART_IER_THRI;
1138 outb(info->IER, info->ioaddr + UART_IER);
1139 spin_unlock_irqrestore(&info->slock, flags);
1140 }
1141 }
1142 return total;
1143 }
1144
1145 static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
1146 {
1147 struct mxser_port *info = tty->driver_data;
1148 unsigned long flags;
1149
1150 if (!info->port.xmit_buf)
1151 return 0;
1152
1153 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1154 return 0;
1155
1156 spin_lock_irqsave(&info->slock, flags);
1157 info->port.xmit_buf[info->xmit_head++] = ch;
1158 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1159 info->xmit_cnt++;
1160 spin_unlock_irqrestore(&info->slock, flags);
1161 if (!tty->stopped) {
1162 if (!tty->hw_stopped ||
1163 (info->type == PORT_16550A) ||
1164 info->board->chip_flag) {
1165 spin_lock_irqsave(&info->slock, flags);
1166 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1167 info->IER |= UART_IER_THRI;
1168 outb(info->IER, info->ioaddr + UART_IER);
1169 spin_unlock_irqrestore(&info->slock, flags);
1170 }
1171 }
1172 return 1;
1173 }
1174
1175
1176 static void mxser_flush_chars(struct tty_struct *tty)
1177 {
1178 struct mxser_port *info = tty->driver_data;
1179 unsigned long flags;
1180
1181 if (info->xmit_cnt <= 0 || tty->stopped || !info->port.xmit_buf ||
1182 (tty->hw_stopped && info->type != PORT_16550A &&
1183 !info->board->chip_flag))
1184 return;
1185
1186 spin_lock_irqsave(&info->slock, flags);
1187
1188 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1189 info->IER |= UART_IER_THRI;
1190 outb(info->IER, info->ioaddr + UART_IER);
1191
1192 spin_unlock_irqrestore(&info->slock, flags);
1193 }
1194
1195 static int mxser_write_room(struct tty_struct *tty)
1196 {
1197 struct mxser_port *info = tty->driver_data;
1198 int ret;
1199
1200 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1201 return ret < 0 ? 0 : ret;
1202 }
1203
1204 static int mxser_chars_in_buffer(struct tty_struct *tty)
1205 {
1206 struct mxser_port *info = tty->driver_data;
1207 return info->xmit_cnt;
1208 }
1209
1210 /*
1211 * ------------------------------------------------------------
1212 * friends of mxser_ioctl()
1213 * ------------------------------------------------------------
1214 */
1215 static int mxser_get_serial_info(struct tty_struct *tty,
1216 struct serial_struct __user *retinfo)
1217 {
1218 struct mxser_port *info = tty->driver_data;
1219 struct serial_struct tmp = {
1220 .type = info->type,
1221 .line = tty->index,
1222 .port = info->ioaddr,
1223 .irq = info->board->irq,
1224 .flags = info->port.flags,
1225 .baud_base = info->baud_base,
1226 .close_delay = info->port.close_delay,
1227 .closing_wait = info->port.closing_wait,
1228 .custom_divisor = info->custom_divisor,
1229 .hub6 = 0
1230 };
1231 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1232 return -EFAULT;
1233 return 0;
1234 }
1235
1236 static int mxser_set_serial_info(struct tty_struct *tty,
1237 struct serial_struct __user *new_info)
1238 {
1239 struct mxser_port *info = tty->driver_data;
1240 struct tty_port *port = &info->port;
1241 struct serial_struct new_serial;
1242 speed_t baud;
1243 unsigned long sl_flags;
1244 unsigned int flags;
1245 int retval = 0;
1246
1247 if (!new_info || !info->ioaddr)
1248 return -ENODEV;
1249 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1250 return -EFAULT;
1251
1252 if (new_serial.irq != info->board->irq ||
1253 new_serial.port != info->ioaddr)
1254 return -EINVAL;
1255
1256 flags = port->flags & ASYNC_SPD_MASK;
1257
1258 if (!capable(CAP_SYS_ADMIN)) {
1259 if ((new_serial.baud_base != info->baud_base) ||
1260 (new_serial.close_delay != info->port.close_delay) ||
1261 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK)))
1262 return -EPERM;
1263 info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
1264 (new_serial.flags & ASYNC_USR_MASK));
1265 } else {
1266 /*
1267 * OK, past this point, all the error checking has been done.
1268 * At this point, we start making changes.....
1269 */
1270 port->flags = ((port->flags & ~ASYNC_FLAGS) |
1271 (new_serial.flags & ASYNC_FLAGS));
1272 port->close_delay = new_serial.close_delay * HZ / 100;
1273 port->closing_wait = new_serial.closing_wait * HZ / 100;
1274 port->low_latency = (port->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
1275 if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
1276 (new_serial.baud_base != info->baud_base ||
1277 new_serial.custom_divisor !=
1278 info->custom_divisor)) {
1279 if (new_serial.custom_divisor == 0)
1280 return -EINVAL;
1281 baud = new_serial.baud_base / new_serial.custom_divisor;
1282 tty_encode_baud_rate(tty, baud, baud);
1283 }
1284 }
1285
1286 info->type = new_serial.type;
1287
1288 process_txrx_fifo(info);
1289
1290 if (test_bit(ASYNCB_INITIALIZED, &port->flags)) {
1291 if (flags != (port->flags & ASYNC_SPD_MASK)) {
1292 spin_lock_irqsave(&info->slock, sl_flags);
1293 mxser_change_speed(tty, NULL);
1294 spin_unlock_irqrestore(&info->slock, sl_flags);
1295 }
1296 } else {
1297 retval = mxser_activate(port, tty);
1298 if (retval == 0)
1299 set_bit(ASYNCB_INITIALIZED, &port->flags);
1300 }
1301 return retval;
1302 }
1303
1304 /*
1305 * mxser_get_lsr_info - get line status register info
1306 *
1307 * Purpose: Let user call ioctl() to get info when the UART physically
1308 * is emptied. On bus types like RS485, the transmitter must
1309 * release the bus after transmitting. This must be done when
1310 * the transmit shift register is empty, not be done when the
1311 * transmit holding register is empty. This functionality
1312 * allows an RS485 driver to be written in user space.
1313 */
1314 static int mxser_get_lsr_info(struct mxser_port *info,
1315 unsigned int __user *value)
1316 {
1317 unsigned char status;
1318 unsigned int result;
1319 unsigned long flags;
1320
1321 spin_lock_irqsave(&info->slock, flags);
1322 status = inb(info->ioaddr + UART_LSR);
1323 spin_unlock_irqrestore(&info->slock, flags);
1324 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1325 return put_user(result, value);
1326 }
1327
1328 static int mxser_tiocmget(struct tty_struct *tty)
1329 {
1330 struct mxser_port *info = tty->driver_data;
1331 unsigned char control, status;
1332 unsigned long flags;
1333
1334
1335 if (tty->index == MXSER_PORTS)
1336 return -ENOIOCTLCMD;
1337 if (test_bit(TTY_IO_ERROR, &tty->flags))
1338 return -EIO;
1339
1340 control = info->MCR;
1341
1342 spin_lock_irqsave(&info->slock, flags);
1343 status = inb(info->ioaddr + UART_MSR);
1344 if (status & UART_MSR_ANY_DELTA)
1345 mxser_check_modem_status(tty, info, status);
1346 spin_unlock_irqrestore(&info->slock, flags);
1347 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1348 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1349 ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1350 ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1351 ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1352 ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1353 }
1354
1355 static int mxser_tiocmset(struct tty_struct *tty,
1356 unsigned int set, unsigned int clear)
1357 {
1358 struct mxser_port *info = tty->driver_data;
1359 unsigned long flags;
1360
1361
1362 if (tty->index == MXSER_PORTS)
1363 return -ENOIOCTLCMD;
1364 if (test_bit(TTY_IO_ERROR, &tty->flags))
1365 return -EIO;
1366
1367 spin_lock_irqsave(&info->slock, flags);
1368
1369 if (set & TIOCM_RTS)
1370 info->MCR |= UART_MCR_RTS;
1371 if (set & TIOCM_DTR)
1372 info->MCR |= UART_MCR_DTR;
1373
1374 if (clear & TIOCM_RTS)
1375 info->MCR &= ~UART_MCR_RTS;
1376 if (clear & TIOCM_DTR)
1377 info->MCR &= ~UART_MCR_DTR;
1378
1379 outb(info->MCR, info->ioaddr + UART_MCR);
1380 spin_unlock_irqrestore(&info->slock, flags);
1381 return 0;
1382 }
1383
1384 static int __init mxser_program_mode(int port)
1385 {
1386 int id, i, j, n;
1387
1388 outb(0, port);
1389 outb(0, port);
1390 outb(0, port);
1391 (void)inb(port);
1392 (void)inb(port);
1393 outb(0, port);
1394 (void)inb(port);
1395
1396 id = inb(port + 1) & 0x1F;
1397 if ((id != C168_ASIC_ID) &&
1398 (id != C104_ASIC_ID) &&
1399 (id != C102_ASIC_ID) &&
1400 (id != CI132_ASIC_ID) &&
1401 (id != CI134_ASIC_ID) &&
1402 (id != CI104J_ASIC_ID))
1403 return -1;
1404 for (i = 0, j = 0; i < 4; i++) {
1405 n = inb(port + 2);
1406 if (n == 'M') {
1407 j = 1;
1408 } else if ((j == 1) && (n == 1)) {
1409 j = 2;
1410 break;
1411 } else
1412 j = 0;
1413 }
1414 if (j != 2)
1415 id = -2;
1416 return id;
1417 }
1418
1419 static void __init mxser_normal_mode(int port)
1420 {
1421 int i, n;
1422
1423 outb(0xA5, port + 1);
1424 outb(0x80, port + 3);
1425 outb(12, port + 0); /* 9600 bps */
1426 outb(0, port + 1);
1427 outb(0x03, port + 3); /* 8 data bits */
1428 outb(0x13, port + 4); /* loop back mode */
1429 for (i = 0; i < 16; i++) {
1430 n = inb(port + 5);
1431 if ((n & 0x61) == 0x60)
1432 break;
1433 if ((n & 1) == 1)
1434 (void)inb(port);
1435 }
1436 outb(0x00, port + 4);
1437 }
1438
1439 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1440 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1441 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1442 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1443 #define EN_CCMD 0x000 /* Chip's command register */
1444 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1445 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1446 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1447 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1448 #define EN0_DCFG 0x00E /* Data configuration reg WR */
1449 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1450 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1451 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
1452 static int __init mxser_read_register(int port, unsigned short *regs)
1453 {
1454 int i, k, value, id;
1455 unsigned int j;
1456
1457 id = mxser_program_mode(port);
1458 if (id < 0)
1459 return id;
1460 for (i = 0; i < 14; i++) {
1461 k = (i & 0x3F) | 0x180;
1462 for (j = 0x100; j > 0; j >>= 1) {
1463 outb(CHIP_CS, port);
1464 if (k & j) {
1465 outb(CHIP_CS | CHIP_DO, port);
1466 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
1467 } else {
1468 outb(CHIP_CS, port);
1469 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
1470 }
1471 }
1472 (void)inb(port);
1473 value = 0;
1474 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1475 outb(CHIP_CS, port);
1476 outb(CHIP_CS | CHIP_SK, port);
1477 if (inb(port) & CHIP_DI)
1478 value |= j;
1479 }
1480 regs[i] = value;
1481 outb(0, port);
1482 }
1483 mxser_normal_mode(port);
1484 return id;
1485 }
1486
1487 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1488 {
1489 struct mxser_port *ip;
1490 struct tty_port *port;
1491 struct tty_struct *tty;
1492 int result, status;
1493 unsigned int i, j;
1494 int ret = 0;
1495
1496 switch (cmd) {
1497 case MOXA_GET_MAJOR:
1498 printk_ratelimited(KERN_WARNING "mxser: '%s' uses deprecated ioctl "
1499 "%x (GET_MAJOR), fix your userspace\n",
1500 current->comm, cmd);
1501 return put_user(ttymajor, (int __user *)argp);
1502
1503 case MOXA_CHKPORTENABLE:
1504 result = 0;
1505 for (i = 0; i < MXSER_BOARDS; i++)
1506 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1507 if (mxser_boards[i].ports[j].ioaddr)
1508 result |= (1 << i);
1509 return put_user(result, (unsigned long __user *)argp);
1510 case MOXA_GETDATACOUNT:
1511 /* The receive side is locked by port->slock but it isn't
1512 clear that an exact snapshot is worth copying here */
1513 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1514 ret = -EFAULT;
1515 return ret;
1516 case MOXA_GETMSTATUS: {
1517 struct mxser_mstatus ms, __user *msu = argp;
1518 for (i = 0; i < MXSER_BOARDS; i++)
1519 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1520 ip = &mxser_boards[i].ports[j];
1521 port = &ip->port;
1522 memset(&ms, 0, sizeof(ms));
1523
1524 mutex_lock(&port->mutex);
1525 if (!ip->ioaddr)
1526 goto copy;
1527
1528 tty = tty_port_tty_get(port);
1529
1530 if (!tty)
1531 ms.cflag = ip->normal_termios.c_cflag;
1532 else
1533 ms.cflag = tty->termios.c_cflag;
1534 tty_kref_put(tty);
1535 spin_lock_irq(&ip->slock);
1536 status = inb(ip->ioaddr + UART_MSR);
1537 spin_unlock_irq(&ip->slock);
1538 if (status & UART_MSR_DCD)
1539 ms.dcd = 1;
1540 if (status & UART_MSR_DSR)
1541 ms.dsr = 1;
1542 if (status & UART_MSR_CTS)
1543 ms.cts = 1;
1544 copy:
1545 mutex_unlock(&port->mutex);
1546 if (copy_to_user(msu, &ms, sizeof(ms)))
1547 return -EFAULT;
1548 msu++;
1549 }
1550 return 0;
1551 }
1552 case MOXA_ASPP_MON_EXT: {
1553 struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */
1554 unsigned int cflag, iflag, p;
1555 u8 opmode;
1556
1557 me = kzalloc(sizeof(*me), GFP_KERNEL);
1558 if (!me)
1559 return -ENOMEM;
1560
1561 for (i = 0, p = 0; i < MXSER_BOARDS; i++) {
1562 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) {
1563 if (p >= ARRAY_SIZE(me->rx_cnt)) {
1564 i = MXSER_BOARDS;
1565 break;
1566 }
1567 ip = &mxser_boards[i].ports[j];
1568 port = &ip->port;
1569
1570 mutex_lock(&port->mutex);
1571 if (!ip->ioaddr) {
1572 mutex_unlock(&port->mutex);
1573 continue;
1574 }
1575
1576 spin_lock_irq(&ip->slock);
1577 status = mxser_get_msr(ip->ioaddr, 0, p);
1578
1579 if (status & UART_MSR_TERI)
1580 ip->icount.rng++;
1581 if (status & UART_MSR_DDSR)
1582 ip->icount.dsr++;
1583 if (status & UART_MSR_DDCD)
1584 ip->icount.dcd++;
1585 if (status & UART_MSR_DCTS)
1586 ip->icount.cts++;
1587
1588 ip->mon_data.modem_status = status;
1589 me->rx_cnt[p] = ip->mon_data.rxcnt;
1590 me->tx_cnt[p] = ip->mon_data.txcnt;
1591 me->up_rxcnt[p] = ip->mon_data.up_rxcnt;
1592 me->up_txcnt[p] = ip->mon_data.up_txcnt;
1593 me->modem_status[p] =
1594 ip->mon_data.modem_status;
1595 spin_unlock_irq(&ip->slock);
1596
1597 tty = tty_port_tty_get(&ip->port);
1598
1599 if (!tty) {
1600 cflag = ip->normal_termios.c_cflag;
1601 iflag = ip->normal_termios.c_iflag;
1602 me->baudrate[p] = tty_termios_baud_rate(&ip->normal_termios);
1603 } else {
1604 cflag = tty->termios.c_cflag;
1605 iflag = tty->termios.c_iflag;
1606 me->baudrate[p] = tty_get_baud_rate(tty);
1607 }
1608 tty_kref_put(tty);
1609
1610 me->databits[p] = cflag & CSIZE;
1611 me->stopbits[p] = cflag & CSTOPB;
1612 me->parity[p] = cflag & (PARENB | PARODD |
1613 CMSPAR);
1614
1615 if (cflag & CRTSCTS)
1616 me->flowctrl[p] |= 0x03;
1617
1618 if (iflag & (IXON | IXOFF))
1619 me->flowctrl[p] |= 0x0C;
1620
1621 if (ip->type == PORT_16550A)
1622 me->fifo[p] = 1;
1623
1624 if (ip->board->chip_flag == MOXA_MUST_MU860_HWID) {
1625 opmode = inb(ip->opmode_ioaddr)>>((p % 4) * 2);
1626 opmode &= OP_MODE_MASK;
1627 } else {
1628 opmode = RS232_MODE;
1629 }
1630 me->iftype[p] = opmode;
1631 mutex_unlock(&port->mutex);
1632 }
1633 }
1634 if (copy_to_user(argp, me, sizeof(*me)))
1635 ret = -EFAULT;
1636 kfree(me);
1637 return ret;
1638 }
1639 default:
1640 return -ENOIOCTLCMD;
1641 }
1642 return 0;
1643 }
1644
1645 static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
1646 struct async_icount *cprev)
1647 {
1648 struct async_icount cnow;
1649 unsigned long flags;
1650 int ret;
1651
1652 spin_lock_irqsave(&info->slock, flags);
1653 cnow = info->icount; /* atomic copy */
1654 spin_unlock_irqrestore(&info->slock, flags);
1655
1656 ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1657 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1658 ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
1659 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
1660
1661 *cprev = cnow;
1662
1663 return ret;
1664 }
1665
1666 static int mxser_ioctl(struct tty_struct *tty,
1667 unsigned int cmd, unsigned long arg)
1668 {
1669 struct mxser_port *info = tty->driver_data;
1670 struct tty_port *port = &info->port;
1671 struct async_icount cnow;
1672 unsigned long flags;
1673 void __user *argp = (void __user *)arg;
1674 int retval;
1675
1676 if (tty->index == MXSER_PORTS)
1677 return mxser_ioctl_special(cmd, argp);
1678
1679 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1680 int p;
1681 unsigned long opmode;
1682 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1683 int shiftbit;
1684 unsigned char val, mask;
1685
1686 if (info->board->chip_flag != MOXA_MUST_MU860_HWID)
1687 return -EFAULT;
1688
1689 p = tty->index % 4;
1690 if (cmd == MOXA_SET_OP_MODE) {
1691 if (get_user(opmode, (int __user *) argp))
1692 return -EFAULT;
1693 if (opmode != RS232_MODE &&
1694 opmode != RS485_2WIRE_MODE &&
1695 opmode != RS422_MODE &&
1696 opmode != RS485_4WIRE_MODE)
1697 return -EFAULT;
1698 mask = ModeMask[p];
1699 shiftbit = p * 2;
1700 spin_lock_irq(&info->slock);
1701 val = inb(info->opmode_ioaddr);
1702 val &= mask;
1703 val |= (opmode << shiftbit);
1704 outb(val, info->opmode_ioaddr);
1705 spin_unlock_irq(&info->slock);
1706 } else {
1707 shiftbit = p * 2;
1708 spin_lock_irq(&info->slock);
1709 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1710 spin_unlock_irq(&info->slock);
1711 opmode &= OP_MODE_MASK;
1712 if (put_user(opmode, (int __user *)argp))
1713 return -EFAULT;
1714 }
1715 return 0;
1716 }
1717
1718 if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT &&
1719 test_bit(TTY_IO_ERROR, &tty->flags))
1720 return -EIO;
1721
1722 switch (cmd) {
1723 case TIOCGSERIAL:
1724 mutex_lock(&port->mutex);
1725 retval = mxser_get_serial_info(tty, argp);
1726 mutex_unlock(&port->mutex);
1727 return retval;
1728 case TIOCSSERIAL:
1729 mutex_lock(&port->mutex);
1730 retval = mxser_set_serial_info(tty, argp);
1731 mutex_unlock(&port->mutex);
1732 return retval;
1733 case TIOCSERGETLSR: /* Get line status register */
1734 return mxser_get_lsr_info(info, argp);
1735 /*
1736 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1737 * - mask passed in arg for lines of interest
1738 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1739 * Caller should use TIOCGICOUNT to see which one it was
1740 */
1741 case TIOCMIWAIT:
1742 spin_lock_irqsave(&info->slock, flags);
1743 cnow = info->icount; /* note the counters on entry */
1744 spin_unlock_irqrestore(&info->slock, flags);
1745
1746 return wait_event_interruptible(info->port.delta_msr_wait,
1747 mxser_cflags_changed(info, arg, &cnow));
1748 case MOXA_HighSpeedOn:
1749 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1750 case MOXA_SDS_RSTICOUNTER:
1751 spin_lock_irq(&info->slock);
1752 info->mon_data.rxcnt = 0;
1753 info->mon_data.txcnt = 0;
1754 spin_unlock_irq(&info->slock);
1755 return 0;
1756
1757 case MOXA_ASPP_OQUEUE:{
1758 int len, lsr;
1759
1760 len = mxser_chars_in_buffer(tty);
1761 spin_lock_irq(&info->slock);
1762 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_THRE;
1763 spin_unlock_irq(&info->slock);
1764 len += (lsr ? 0 : 1);
1765
1766 return put_user(len, (int __user *)argp);
1767 }
1768 case MOXA_ASPP_MON: {
1769 int mcr, status;
1770
1771 spin_lock_irq(&info->slock);
1772 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1773 mxser_check_modem_status(tty, info, status);
1774
1775 mcr = inb(info->ioaddr + UART_MCR);
1776 spin_unlock_irq(&info->slock);
1777
1778 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1779 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1780 else
1781 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1782
1783 if (mcr & MOXA_MUST_MCR_TX_XON)
1784 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1785 else
1786 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1787
1788 if (tty->hw_stopped)
1789 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1790 else
1791 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1792
1793 if (copy_to_user(argp, &info->mon_data,
1794 sizeof(struct mxser_mon)))
1795 return -EFAULT;
1796
1797 return 0;
1798 }
1799 case MOXA_ASPP_LSTATUS: {
1800 if (put_user(info->err_shadow, (unsigned char __user *)argp))
1801 return -EFAULT;
1802
1803 info->err_shadow = 0;
1804 return 0;
1805 }
1806 case MOXA_SET_BAUD_METHOD: {
1807 int method;
1808
1809 if (get_user(method, (int __user *)argp))
1810 return -EFAULT;
1811 mxser_set_baud_method[tty->index] = method;
1812 return put_user(method, (int __user *)argp);
1813 }
1814 default:
1815 return -ENOIOCTLCMD;
1816 }
1817 return 0;
1818 }
1819
1820 /*
1821 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1822 * Return: write counters to the user passed counter struct
1823 * NB: both 1->0 and 0->1 transitions are counted except for
1824 * RI where only 0->1 is counted.
1825 */
1826
1827 static int mxser_get_icount(struct tty_struct *tty,
1828 struct serial_icounter_struct *icount)
1829
1830 {
1831 struct mxser_port *info = tty->driver_data;
1832 struct async_icount cnow;
1833 unsigned long flags;
1834
1835 spin_lock_irqsave(&info->slock, flags);
1836 cnow = info->icount;
1837 spin_unlock_irqrestore(&info->slock, flags);
1838
1839 icount->frame = cnow.frame;
1840 icount->brk = cnow.brk;
1841 icount->overrun = cnow.overrun;
1842 icount->buf_overrun = cnow.buf_overrun;
1843 icount->parity = cnow.parity;
1844 icount->rx = cnow.rx;
1845 icount->tx = cnow.tx;
1846 icount->cts = cnow.cts;
1847 icount->dsr = cnow.dsr;
1848 icount->rng = cnow.rng;
1849 icount->dcd = cnow.dcd;
1850 return 0;
1851 }
1852
1853 static void mxser_stoprx(struct tty_struct *tty)
1854 {
1855 struct mxser_port *info = tty->driver_data;
1856
1857 info->ldisc_stop_rx = 1;
1858 if (I_IXOFF(tty)) {
1859 if (info->board->chip_flag) {
1860 info->IER &= ~MOXA_MUST_RECV_ISR;
1861 outb(info->IER, info->ioaddr + UART_IER);
1862 } else {
1863 info->x_char = STOP_CHAR(tty);
1864 outb(0, info->ioaddr + UART_IER);
1865 info->IER |= UART_IER_THRI;
1866 outb(info->IER, info->ioaddr + UART_IER);
1867 }
1868 }
1869
1870 if (C_CRTSCTS(tty)) {
1871 info->MCR &= ~UART_MCR_RTS;
1872 outb(info->MCR, info->ioaddr + UART_MCR);
1873 }
1874 }
1875
1876 /*
1877 * This routine is called by the upper-layer tty layer to signal that
1878 * incoming characters should be throttled.
1879 */
1880 static void mxser_throttle(struct tty_struct *tty)
1881 {
1882 mxser_stoprx(tty);
1883 }
1884
1885 static void mxser_unthrottle(struct tty_struct *tty)
1886 {
1887 struct mxser_port *info = tty->driver_data;
1888
1889 /* startrx */
1890 info->ldisc_stop_rx = 0;
1891 if (I_IXOFF(tty)) {
1892 if (info->x_char)
1893 info->x_char = 0;
1894 else {
1895 if (info->board->chip_flag) {
1896 info->IER |= MOXA_MUST_RECV_ISR;
1897 outb(info->IER, info->ioaddr + UART_IER);
1898 } else {
1899 info->x_char = START_CHAR(tty);
1900 outb(0, info->ioaddr + UART_IER);
1901 info->IER |= UART_IER_THRI;
1902 outb(info->IER, info->ioaddr + UART_IER);
1903 }
1904 }
1905 }
1906
1907 if (C_CRTSCTS(tty)) {
1908 info->MCR |= UART_MCR_RTS;
1909 outb(info->MCR, info->ioaddr + UART_MCR);
1910 }
1911 }
1912
1913 /*
1914 * mxser_stop() and mxser_start()
1915 *
1916 * This routines are called before setting or resetting tty->stopped.
1917 * They enable or disable transmitter interrupts, as necessary.
1918 */
1919 static void mxser_stop(struct tty_struct *tty)
1920 {
1921 struct mxser_port *info = tty->driver_data;
1922 unsigned long flags;
1923
1924 spin_lock_irqsave(&info->slock, flags);
1925 if (info->IER & UART_IER_THRI) {
1926 info->IER &= ~UART_IER_THRI;
1927 outb(info->IER, info->ioaddr + UART_IER);
1928 }
1929 spin_unlock_irqrestore(&info->slock, flags);
1930 }
1931
1932 static void mxser_start(struct tty_struct *tty)
1933 {
1934 struct mxser_port *info = tty->driver_data;
1935 unsigned long flags;
1936
1937 spin_lock_irqsave(&info->slock, flags);
1938 if (info->xmit_cnt && info->port.xmit_buf) {
1939 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1940 info->IER |= UART_IER_THRI;
1941 outb(info->IER, info->ioaddr + UART_IER);
1942 }
1943 spin_unlock_irqrestore(&info->slock, flags);
1944 }
1945
1946 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1947 {
1948 struct mxser_port *info = tty->driver_data;
1949 unsigned long flags;
1950
1951 spin_lock_irqsave(&info->slock, flags);
1952 mxser_change_speed(tty, old_termios);
1953 spin_unlock_irqrestore(&info->slock, flags);
1954
1955 if ((old_termios->c_cflag & CRTSCTS) && !C_CRTSCTS(tty)) {
1956 tty->hw_stopped = 0;
1957 mxser_start(tty);
1958 }
1959
1960 /* Handle sw stopped */
1961 if ((old_termios->c_iflag & IXON) && !I_IXON(tty)) {
1962 tty->stopped = 0;
1963
1964 if (info->board->chip_flag) {
1965 spin_lock_irqsave(&info->slock, flags);
1966 mxser_disable_must_rx_software_flow_control(
1967 info->ioaddr);
1968 spin_unlock_irqrestore(&info->slock, flags);
1969 }
1970
1971 mxser_start(tty);
1972 }
1973 }
1974
1975 /*
1976 * mxser_wait_until_sent() --- wait until the transmitter is empty
1977 */
1978 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1979 {
1980 struct mxser_port *info = tty->driver_data;
1981 unsigned long orig_jiffies, char_time;
1982 unsigned long flags;
1983 int lsr;
1984
1985 if (info->type == PORT_UNKNOWN)
1986 return;
1987
1988 if (info->xmit_fifo_size == 0)
1989 return; /* Just in case.... */
1990
1991 orig_jiffies = jiffies;
1992 /*
1993 * Set the check interval to be 1/5 of the estimated time to
1994 * send a single character, and make it at least 1. The check
1995 * interval should also be less than the timeout.
1996 *
1997 * Note: we have to use pretty tight timings here to satisfy
1998 * the NIST-PCTS.
1999 */
2000 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2001 char_time = char_time / 5;
2002 if (char_time == 0)
2003 char_time = 1;
2004 if (timeout && timeout < char_time)
2005 char_time = timeout;
2006 /*
2007 * If the transmitter hasn't cleared in twice the approximate
2008 * amount of time to send the entire FIFO, it probably won't
2009 * ever clear. This assumes the UART isn't doing flow
2010 * control, which is currently the case. Hence, if it ever
2011 * takes longer than info->timeout, this is probably due to a
2012 * UART bug of some kind. So, we clamp the timeout parameter at
2013 * 2*info->timeout.
2014 */
2015 if (!timeout || timeout > 2 * info->timeout)
2016 timeout = 2 * info->timeout;
2017
2018 spin_lock_irqsave(&info->slock, flags);
2019 while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
2020 spin_unlock_irqrestore(&info->slock, flags);
2021 schedule_timeout_interruptible(char_time);
2022 spin_lock_irqsave(&info->slock, flags);
2023 if (signal_pending(current))
2024 break;
2025 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2026 break;
2027 }
2028 spin_unlock_irqrestore(&info->slock, flags);
2029 set_current_state(TASK_RUNNING);
2030 }
2031
2032 /*
2033 * This routine is called by tty_hangup() when a hangup is signaled.
2034 */
2035 static void mxser_hangup(struct tty_struct *tty)
2036 {
2037 struct mxser_port *info = tty->driver_data;
2038
2039 mxser_flush_buffer(tty);
2040 tty_port_hangup(&info->port);
2041 }
2042
2043 /*
2044 * mxser_rs_break() --- routine which turns the break handling on or off
2045 */
2046 static int mxser_rs_break(struct tty_struct *tty, int break_state)
2047 {
2048 struct mxser_port *info = tty->driver_data;
2049 unsigned long flags;
2050
2051 spin_lock_irqsave(&info->slock, flags);
2052 if (break_state == -1)
2053 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2054 info->ioaddr + UART_LCR);
2055 else
2056 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2057 info->ioaddr + UART_LCR);
2058 spin_unlock_irqrestore(&info->slock, flags);
2059 return 0;
2060 }
2061
2062 static void mxser_receive_chars(struct tty_struct *tty,
2063 struct mxser_port *port, int *status)
2064 {
2065 unsigned char ch, gdl;
2066 int ignored = 0;
2067 int cnt = 0;
2068 int recv_room;
2069 int max = 256;
2070
2071 recv_room = tty->receive_room;
2072 if (recv_room == 0 && !port->ldisc_stop_rx)
2073 mxser_stoprx(tty);
2074 if (port->board->chip_flag != MOXA_OTHER_UART) {
2075
2076 if (*status & UART_LSR_SPECIAL)
2077 goto intr_old;
2078 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2079 (*status & MOXA_MUST_LSR_RERR))
2080 goto intr_old;
2081 if (*status & MOXA_MUST_LSR_RERR)
2082 goto intr_old;
2083
2084 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2085
2086 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2087 gdl &= MOXA_MUST_GDL_MASK;
2088 if (gdl >= recv_room) {
2089 if (!port->ldisc_stop_rx)
2090 mxser_stoprx(tty);
2091 }
2092 while (gdl--) {
2093 ch = inb(port->ioaddr + UART_RX);
2094 tty_insert_flip_char(&port->port, ch, 0);
2095 cnt++;
2096 }
2097 goto end_intr;
2098 }
2099 intr_old:
2100
2101 do {
2102 if (max-- < 0)
2103 break;
2104
2105 ch = inb(port->ioaddr + UART_RX);
2106 if (port->board->chip_flag && (*status & UART_LSR_OE))
2107 outb(0x23, port->ioaddr + UART_FCR);
2108 *status &= port->read_status_mask;
2109 if (*status & port->ignore_status_mask) {
2110 if (++ignored > 100)
2111 break;
2112 } else {
2113 char flag = 0;
2114 if (*status & UART_LSR_SPECIAL) {
2115 if (*status & UART_LSR_BI) {
2116 flag = TTY_BREAK;
2117 port->icount.brk++;
2118
2119 if (port->port.flags & ASYNC_SAK)
2120 do_SAK(tty);
2121 } else if (*status & UART_LSR_PE) {
2122 flag = TTY_PARITY;
2123 port->icount.parity++;
2124 } else if (*status & UART_LSR_FE) {
2125 flag = TTY_FRAME;
2126 port->icount.frame++;
2127 } else if (*status & UART_LSR_OE) {
2128 flag = TTY_OVERRUN;
2129 port->icount.overrun++;
2130 } else
2131 flag = TTY_BREAK;
2132 }
2133 tty_insert_flip_char(&port->port, ch, flag);
2134 cnt++;
2135 if (cnt >= recv_room) {
2136 if (!port->ldisc_stop_rx)
2137 mxser_stoprx(tty);
2138 break;
2139 }
2140
2141 }
2142
2143 if (port->board->chip_flag)
2144 break;
2145
2146 *status = inb(port->ioaddr + UART_LSR);
2147 } while (*status & UART_LSR_DR);
2148
2149 end_intr:
2150 mxvar_log.rxcnt[tty->index] += cnt;
2151 port->mon_data.rxcnt += cnt;
2152 port->mon_data.up_rxcnt += cnt;
2153
2154 /*
2155 * We are called from an interrupt context with &port->slock
2156 * being held. Drop it temporarily in order to prevent
2157 * recursive locking.
2158 */
2159 spin_unlock(&port->slock);
2160 tty_flip_buffer_push(&port->port);
2161 spin_lock(&port->slock);
2162 }
2163
2164 static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port)
2165 {
2166 int count, cnt;
2167
2168 if (port->x_char) {
2169 outb(port->x_char, port->ioaddr + UART_TX);
2170 port->x_char = 0;
2171 mxvar_log.txcnt[tty->index]++;
2172 port->mon_data.txcnt++;
2173 port->mon_data.up_txcnt++;
2174 port->icount.tx++;
2175 return;
2176 }
2177
2178 if (port->port.xmit_buf == NULL)
2179 return;
2180
2181 if (port->xmit_cnt <= 0 || tty->stopped ||
2182 (tty->hw_stopped &&
2183 (port->type != PORT_16550A) &&
2184 (!port->board->chip_flag))) {
2185 port->IER &= ~UART_IER_THRI;
2186 outb(port->IER, port->ioaddr + UART_IER);
2187 return;
2188 }
2189
2190 cnt = port->xmit_cnt;
2191 count = port->xmit_fifo_size;
2192 do {
2193 outb(port->port.xmit_buf[port->xmit_tail++],
2194 port->ioaddr + UART_TX);
2195 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2196 if (--port->xmit_cnt <= 0)
2197 break;
2198 } while (--count > 0);
2199 mxvar_log.txcnt[tty->index] += (cnt - port->xmit_cnt);
2200
2201 port->mon_data.txcnt += (cnt - port->xmit_cnt);
2202 port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2203 port->icount.tx += (cnt - port->xmit_cnt);
2204
2205 if (port->xmit_cnt < WAKEUP_CHARS)
2206 tty_wakeup(tty);
2207
2208 if (port->xmit_cnt <= 0) {
2209 port->IER &= ~UART_IER_THRI;
2210 outb(port->IER, port->ioaddr + UART_IER);
2211 }
2212 }
2213
2214 /*
2215 * This is the serial driver's generic interrupt routine
2216 */
2217 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2218 {
2219 int status, iir, i;
2220 struct mxser_board *brd = NULL;
2221 struct mxser_port *port;
2222 int max, irqbits, bits, msr;
2223 unsigned int int_cnt, pass_counter = 0;
2224 int handled = IRQ_NONE;
2225 struct tty_struct *tty;
2226
2227 for (i = 0; i < MXSER_BOARDS; i++)
2228 if (dev_id == &mxser_boards[i]) {
2229 brd = dev_id;
2230 break;
2231 }
2232
2233 if (i == MXSER_BOARDS)
2234 goto irq_stop;
2235 if (brd == NULL)
2236 goto irq_stop;
2237 max = brd->info->nports;
2238 while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
2239 irqbits = inb(brd->vector) & brd->vector_mask;
2240 if (irqbits == brd->vector_mask)
2241 break;
2242
2243 handled = IRQ_HANDLED;
2244 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2245 if (irqbits == brd->vector_mask)
2246 break;
2247 if (bits & irqbits)
2248 continue;
2249 port = &brd->ports[i];
2250
2251 int_cnt = 0;
2252 spin_lock(&port->slock);
2253 do {
2254 iir = inb(port->ioaddr + UART_IIR);
2255 if (iir & UART_IIR_NO_INT)
2256 break;
2257 iir &= MOXA_MUST_IIR_MASK;
2258 tty = tty_port_tty_get(&port->port);
2259 if (!tty || port->closing ||
2260 !(port->port.flags & ASYNC_INITIALIZED)) {
2261 status = inb(port->ioaddr + UART_LSR);
2262 outb(0x27, port->ioaddr + UART_FCR);
2263 inb(port->ioaddr + UART_MSR);
2264 tty_kref_put(tty);
2265 break;
2266 }
2267
2268 status = inb(port->ioaddr + UART_LSR);
2269
2270 if (status & UART_LSR_PE)
2271 port->err_shadow |= NPPI_NOTIFY_PARITY;
2272 if (status & UART_LSR_FE)
2273 port->err_shadow |= NPPI_NOTIFY_FRAMING;
2274 if (status & UART_LSR_OE)
2275 port->err_shadow |=
2276 NPPI_NOTIFY_HW_OVERRUN;
2277 if (status & UART_LSR_BI)
2278 port->err_shadow |= NPPI_NOTIFY_BREAK;
2279
2280 if (port->board->chip_flag) {
2281 if (iir == MOXA_MUST_IIR_GDA ||
2282 iir == MOXA_MUST_IIR_RDA ||
2283 iir == MOXA_MUST_IIR_RTO ||
2284 iir == MOXA_MUST_IIR_LSR)
2285 mxser_receive_chars(tty, port,
2286 &status);
2287
2288 } else {
2289 status &= port->read_status_mask;
2290 if (status & UART_LSR_DR)
2291 mxser_receive_chars(tty, port,
2292 &status);
2293 }
2294 msr = inb(port->ioaddr + UART_MSR);
2295 if (msr & UART_MSR_ANY_DELTA)
2296 mxser_check_modem_status(tty, port, msr);
2297
2298 if (port->board->chip_flag) {
2299 if (iir == 0x02 && (status &
2300 UART_LSR_THRE))
2301 mxser_transmit_chars(tty, port);
2302 } else {
2303 if (status & UART_LSR_THRE)
2304 mxser_transmit_chars(tty, port);
2305 }
2306 tty_kref_put(tty);
2307 } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2308 spin_unlock(&port->slock);
2309 }
2310 }
2311
2312 irq_stop:
2313 return handled;
2314 }
2315
2316 static const struct tty_operations mxser_ops = {
2317 .open = mxser_open,
2318 .close = mxser_close,
2319 .write = mxser_write,
2320 .put_char = mxser_put_char,
2321 .flush_chars = mxser_flush_chars,
2322 .write_room = mxser_write_room,
2323 .chars_in_buffer = mxser_chars_in_buffer,
2324 .flush_buffer = mxser_flush_buffer,
2325 .ioctl = mxser_ioctl,
2326 .throttle = mxser_throttle,
2327 .unthrottle = mxser_unthrottle,
2328 .set_termios = mxser_set_termios,
2329 .stop = mxser_stop,
2330 .start = mxser_start,
2331 .hangup = mxser_hangup,
2332 .break_ctl = mxser_rs_break,
2333 .wait_until_sent = mxser_wait_until_sent,
2334 .tiocmget = mxser_tiocmget,
2335 .tiocmset = mxser_tiocmset,
2336 .get_icount = mxser_get_icount,
2337 };
2338
2339 static struct tty_port_operations mxser_port_ops = {
2340 .carrier_raised = mxser_carrier_raised,
2341 .dtr_rts = mxser_dtr_rts,
2342 .activate = mxser_activate,
2343 .shutdown = mxser_shutdown_port,
2344 };
2345
2346 /*
2347 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2348 */
2349
2350 static bool allow_overlapping_vector;
2351 module_param(allow_overlapping_vector, bool, S_IRUGO);
2352 MODULE_PARM_DESC(allow_overlapping_vector, "whether we allow ISA cards to be configured such that vector overlabs IO ports (default=no)");
2353
2354 static bool mxser_overlapping_vector(struct mxser_board *brd)
2355 {
2356 return allow_overlapping_vector &&
2357 brd->vector >= brd->ports[0].ioaddr &&
2358 brd->vector < brd->ports[0].ioaddr + 8 * brd->info->nports;
2359 }
2360
2361 static int mxser_request_vector(struct mxser_board *brd)
2362 {
2363 if (mxser_overlapping_vector(brd))
2364 return 0;
2365 return request_region(brd->vector, 1, "mxser(vector)") ? 0 : -EIO;
2366 }
2367
2368 static void mxser_release_vector(struct mxser_board *brd)
2369 {
2370 if (mxser_overlapping_vector(brd))
2371 return;
2372 release_region(brd->vector, 1);
2373 }
2374
2375 static void mxser_release_ISA_res(struct mxser_board *brd)
2376 {
2377 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2378 mxser_release_vector(brd);
2379 }
2380
2381 static int mxser_initbrd(struct mxser_board *brd,
2382 struct pci_dev *pdev)
2383 {
2384 struct mxser_port *info;
2385 unsigned int i;
2386 int retval;
2387
2388 printk(KERN_INFO "mxser: max. baud rate = %d bps\n",
2389 brd->ports[0].max_baud);
2390
2391 for (i = 0; i < brd->info->nports; i++) {
2392 info = &brd->ports[i];
2393 tty_port_init(&info->port);
2394 info->port.ops = &mxser_port_ops;
2395 info->board = brd;
2396 info->stop_rx = 0;
2397 info->ldisc_stop_rx = 0;
2398
2399 /* Enhance mode enabled here */
2400 if (brd->chip_flag != MOXA_OTHER_UART)
2401 mxser_enable_must_enchance_mode(info->ioaddr);
2402
2403 info->port.flags = ASYNC_SHARE_IRQ;
2404 info->type = brd->uart_type;
2405
2406 process_txrx_fifo(info);
2407
2408 info->custom_divisor = info->baud_base * 16;
2409 info->port.close_delay = 5 * HZ / 10;
2410 info->port.closing_wait = 30 * HZ;
2411 info->normal_termios = mxvar_sdriver->init_termios;
2412 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2413 info->err_shadow = 0;
2414 spin_lock_init(&info->slock);
2415
2416 /* before set INT ISR, disable all int */
2417 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2418 info->ioaddr + UART_IER);
2419 }
2420
2421 retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
2422 brd);
2423 if (retval) {
2424 for (i = 0; i < brd->info->nports; i++)
2425 tty_port_destroy(&brd->ports[i].port);
2426 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2427 "conflict with another device.\n",
2428 brd->info->name, brd->irq);
2429 }
2430
2431 return retval;
2432 }
2433
2434 static void mxser_board_remove(struct mxser_board *brd)
2435 {
2436 unsigned int i;
2437
2438 for (i = 0; i < brd->info->nports; i++) {
2439 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2440 tty_port_destroy(&brd->ports[i].port);
2441 }
2442 free_irq(brd->irq, brd);
2443 }
2444
2445 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2446 {
2447 int id, i, bits, ret;
2448 unsigned short regs[16], irq;
2449 unsigned char scratch, scratch2;
2450
2451 brd->chip_flag = MOXA_OTHER_UART;
2452
2453 id = mxser_read_register(cap, regs);
2454 switch (id) {
2455 case C168_ASIC_ID:
2456 brd->info = &mxser_cards[0];
2457 break;
2458 case C104_ASIC_ID:
2459 brd->info = &mxser_cards[1];
2460 break;
2461 case CI104J_ASIC_ID:
2462 brd->info = &mxser_cards[2];
2463 break;
2464 case C102_ASIC_ID:
2465 brd->info = &mxser_cards[5];
2466 break;
2467 case CI132_ASIC_ID:
2468 brd->info = &mxser_cards[6];
2469 break;
2470 case CI134_ASIC_ID:
2471 brd->info = &mxser_cards[7];
2472 break;
2473 default:
2474 return 0;
2475 }
2476
2477 irq = 0;
2478 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2479 Flag-hack checks if configuration should be read as 2-port here. */
2480 if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2481 irq = regs[9] & 0xF000;
2482 irq = irq | (irq >> 4);
2483 if (irq != (regs[9] & 0xFF00))
2484 goto err_irqconflict;
2485 } else if (brd->info->nports == 4) {
2486 irq = regs[9] & 0xF000;
2487 irq = irq | (irq >> 4);
2488 irq = irq | (irq >> 8);
2489 if (irq != regs[9])
2490 goto err_irqconflict;
2491 } else if (brd->info->nports == 8) {
2492 irq = regs[9] & 0xF000;
2493 irq = irq | (irq >> 4);
2494 irq = irq | (irq >> 8);
2495 if ((irq != regs[9]) || (irq != regs[10]))
2496 goto err_irqconflict;
2497 }
2498
2499 if (!irq) {
2500 printk(KERN_ERR "mxser: interrupt number unset\n");
2501 return -EIO;
2502 }
2503 brd->irq = ((int)(irq & 0xF000) >> 12);
2504 for (i = 0; i < 8; i++)
2505 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2506 if ((regs[12] & 0x80) == 0) {
2507 printk(KERN_ERR "mxser: invalid interrupt vector\n");
2508 return -EIO;
2509 }
2510 brd->vector = (int)regs[11]; /* interrupt vector */
2511 if (id == 1)
2512 brd->vector_mask = 0x00FF;
2513 else
2514 brd->vector_mask = 0x000F;
2515 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2516 if (regs[12] & bits) {
2517 brd->ports[i].baud_base = 921600;
2518 brd->ports[i].max_baud = 921600;
2519 } else {
2520 brd->ports[i].baud_base = 115200;
2521 brd->ports[i].max_baud = 115200;
2522 }
2523 }
2524 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2525 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2526 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
2527 outb(scratch2, cap + UART_LCR);
2528 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2529 scratch = inb(cap + UART_IIR);
2530
2531 if (scratch & 0xC0)
2532 brd->uart_type = PORT_16550A;
2533 else
2534 brd->uart_type = PORT_16450;
2535 if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2536 "mxser(IO)")) {
2537 printk(KERN_ERR "mxser: can't request ports I/O region: "
2538 "0x%.8lx-0x%.8lx\n",
2539 brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2540 8 * brd->info->nports - 1);
2541 return -EIO;
2542 }
2543
2544 ret = mxser_request_vector(brd);
2545 if (ret) {
2546 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2547 printk(KERN_ERR "mxser: can't request interrupt vector region: "
2548 "0x%.8lx-0x%.8lx\n",
2549 brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2550 8 * brd->info->nports - 1);
2551 return ret;
2552 }
2553 return brd->info->nports;
2554
2555 err_irqconflict:
2556 printk(KERN_ERR "mxser: invalid interrupt number\n");
2557 return -EIO;
2558 }
2559
2560 static int mxser_probe(struct pci_dev *pdev,
2561 const struct pci_device_id *ent)
2562 {
2563 #ifdef CONFIG_PCI
2564 struct mxser_board *brd;
2565 unsigned int i, j;
2566 unsigned long ioaddress;
2567 struct device *tty_dev;
2568 int retval = -EINVAL;
2569
2570 for (i = 0; i < MXSER_BOARDS; i++)
2571 if (mxser_boards[i].info == NULL)
2572 break;
2573
2574 if (i >= MXSER_BOARDS) {
2575 dev_err(&pdev->dev, "too many boards found (maximum %d), board "
2576 "not configured\n", MXSER_BOARDS);
2577 goto err;
2578 }
2579
2580 brd = &mxser_boards[i];
2581 brd->idx = i * MXSER_PORTS_PER_BOARD;
2582 dev_info(&pdev->dev, "found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2583 mxser_cards[ent->driver_data].name,
2584 pdev->bus->number, PCI_SLOT(pdev->devfn));
2585
2586 retval = pci_enable_device(pdev);
2587 if (retval) {
2588 dev_err(&pdev->dev, "PCI enable failed\n");
2589 goto err;
2590 }
2591
2592 /* io address */
2593 ioaddress = pci_resource_start(pdev, 2);
2594 retval = pci_request_region(pdev, 2, "mxser(IO)");
2595 if (retval)
2596 goto err_dis;
2597
2598 brd->info = &mxser_cards[ent->driver_data];
2599 for (i = 0; i < brd->info->nports; i++)
2600 brd->ports[i].ioaddr = ioaddress + 8 * i;
2601
2602 /* vector */
2603 ioaddress = pci_resource_start(pdev, 3);
2604 retval = pci_request_region(pdev, 3, "mxser(vector)");
2605 if (retval)
2606 goto err_zero;
2607 brd->vector = ioaddress;
2608
2609 /* irq */
2610 brd->irq = pdev->irq;
2611
2612 brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2613 brd->uart_type = PORT_16550A;
2614 brd->vector_mask = 0;
2615
2616 for (i = 0; i < brd->info->nports; i++) {
2617 for (j = 0; j < UART_INFO_NUM; j++) {
2618 if (Gpci_uart_info[j].type == brd->chip_flag) {
2619 brd->ports[i].max_baud =
2620 Gpci_uart_info[j].max_baud;
2621
2622 /* exception....CP-102 */
2623 if (brd->info->flags & MXSER_HIGHBAUD)
2624 brd->ports[i].max_baud = 921600;
2625 break;
2626 }
2627 }
2628 }
2629
2630 if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2631 for (i = 0; i < brd->info->nports; i++) {
2632 if (i < 4)
2633 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2634 else
2635 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2636 }
2637 outb(0, ioaddress + 4); /* default set to RS232 mode */
2638 outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
2639 }
2640
2641 for (i = 0; i < brd->info->nports; i++) {
2642 brd->vector_mask |= (1 << i);
2643 brd->ports[i].baud_base = 921600;
2644 }
2645
2646 /* mxser_initbrd will hook ISR. */
2647 retval = mxser_initbrd(brd, pdev);
2648 if (retval)
2649 goto err_rel3;
2650
2651 for (i = 0; i < brd->info->nports; i++) {
2652 tty_dev = tty_port_register_device(&brd->ports[i].port,
2653 mxvar_sdriver, brd->idx + i, &pdev->dev);
2654 if (IS_ERR(tty_dev)) {
2655 retval = PTR_ERR(tty_dev);
2656 for (; i > 0; i--)
2657 tty_unregister_device(mxvar_sdriver,
2658 brd->idx + i - 1);
2659 goto err_relbrd;
2660 }
2661 }
2662
2663 pci_set_drvdata(pdev, brd);
2664
2665 return 0;
2666 err_relbrd:
2667 for (i = 0; i < brd->info->nports; i++)
2668 tty_port_destroy(&brd->ports[i].port);
2669 free_irq(brd->irq, brd);
2670 err_rel3:
2671 pci_release_region(pdev, 3);
2672 err_zero:
2673 brd->info = NULL;
2674 pci_release_region(pdev, 2);
2675 err_dis:
2676 pci_disable_device(pdev);
2677 err:
2678 return retval;
2679 #else
2680 return -ENODEV;
2681 #endif
2682 }
2683
2684 static void mxser_remove(struct pci_dev *pdev)
2685 {
2686 #ifdef CONFIG_PCI
2687 struct mxser_board *brd = pci_get_drvdata(pdev);
2688
2689 mxser_board_remove(brd);
2690
2691 pci_release_region(pdev, 2);
2692 pci_release_region(pdev, 3);
2693 pci_disable_device(pdev);
2694 brd->info = NULL;
2695 #endif
2696 }
2697
2698 static struct pci_driver mxser_driver = {
2699 .name = "mxser",
2700 .id_table = mxser_pcibrds,
2701 .probe = mxser_probe,
2702 .remove = mxser_remove
2703 };
2704
2705 static int __init mxser_module_init(void)
2706 {
2707 struct mxser_board *brd;
2708 struct device *tty_dev;
2709 unsigned int b, i, m;
2710 int retval;
2711
2712 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2713 if (!mxvar_sdriver)
2714 return -ENOMEM;
2715
2716 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2717 MXSER_VERSION);
2718
2719 /* Initialize the tty_driver structure */
2720 mxvar_sdriver->name = "ttyMI";
2721 mxvar_sdriver->major = ttymajor;
2722 mxvar_sdriver->minor_start = 0;
2723 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2724 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2725 mxvar_sdriver->init_termios = tty_std_termios;
2726 mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2727 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2728 tty_set_operations(mxvar_sdriver, &mxser_ops);
2729
2730 retval = tty_register_driver(mxvar_sdriver);
2731 if (retval) {
2732 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2733 "tty driver !\n");
2734 goto err_put;
2735 }
2736
2737 /* Start finding ISA boards here */
2738 for (m = 0, b = 0; b < MXSER_BOARDS; b++) {
2739 if (!ioaddr[b])
2740 continue;
2741
2742 brd = &mxser_boards[m];
2743 retval = mxser_get_ISA_conf(ioaddr[b], brd);
2744 if (retval <= 0) {
2745 brd->info = NULL;
2746 continue;
2747 }
2748
2749 printk(KERN_INFO "mxser: found MOXA %s board (CAP=0x%lx)\n",
2750 brd->info->name, ioaddr[b]);
2751
2752 /* mxser_initbrd will hook ISR. */
2753 if (mxser_initbrd(brd, NULL) < 0) {
2754 mxser_release_ISA_res(brd);
2755 brd->info = NULL;
2756 continue;
2757 }
2758
2759 brd->idx = m * MXSER_PORTS_PER_BOARD;
2760 for (i = 0; i < brd->info->nports; i++) {
2761 tty_dev = tty_port_register_device(&brd->ports[i].port,
2762 mxvar_sdriver, brd->idx + i, NULL);
2763 if (IS_ERR(tty_dev)) {
2764 for (; i > 0; i--)
2765 tty_unregister_device(mxvar_sdriver,
2766 brd->idx + i - 1);
2767 for (i = 0; i < brd->info->nports; i++)
2768 tty_port_destroy(&brd->ports[i].port);
2769 free_irq(brd->irq, brd);
2770 mxser_release_ISA_res(brd);
2771 brd->info = NULL;
2772 break;
2773 }
2774 }
2775 if (brd->info == NULL)
2776 continue;
2777
2778 m++;
2779 }
2780
2781 retval = pci_register_driver(&mxser_driver);
2782 if (retval) {
2783 printk(KERN_ERR "mxser: can't register pci driver\n");
2784 if (!m) {
2785 retval = -ENODEV;
2786 goto err_unr;
2787 } /* else: we have some ISA cards under control */
2788 }
2789
2790 return 0;
2791 err_unr:
2792 tty_unregister_driver(mxvar_sdriver);
2793 err_put:
2794 put_tty_driver(mxvar_sdriver);
2795 return retval;
2796 }
2797
2798 static void __exit mxser_module_exit(void)
2799 {
2800 unsigned int i;
2801
2802 pci_unregister_driver(&mxser_driver);
2803
2804 for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2805 if (mxser_boards[i].info != NULL)
2806 mxser_board_remove(&mxser_boards[i]);
2807 tty_unregister_driver(mxvar_sdriver);
2808 put_tty_driver(mxvar_sdriver);
2809
2810 for (i = 0; i < MXSER_BOARDS; i++)
2811 if (mxser_boards[i].info != NULL)
2812 mxser_release_ISA_res(&mxser_boards[i]);
2813 }
2814
2815 module_init(mxser_module_init);
2816 module_exit(mxser_module_exit);
Linux kernel - Deliverables
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