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mtd: tests: fix read buffer overflows
[linux-2.6/mini2440.git] / drivers / char / mxser.c
blobdbf8d52f31d02d743b0436abcc871104bdf7e588
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/smp_lock.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/delay.h>
41 #include <linux/pci.h>
42 #include <linux/bitops.h>
43
44 #include <asm/system.h>
45 #include <asm/io.h>
46 #include <asm/irq.h>
47 #include <asm/uaccess.h>
48
49 #include "mxser.h"
50
51 #define MXSER_VERSION "2.0.4" /* 1.12 */
52 #define MXSERMAJOR 174
53
54 #define MXSER_BOARDS 4 /* Max. boards */
55 #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
56 #define MXSER_PORTS (MXSER_BOARDS * MXSER_PORTS_PER_BOARD)
57 #define MXSER_ISR_PASS_LIMIT 100
58
59 /*CheckIsMoxaMust return value*/
60 #define MOXA_OTHER_UART 0x00
61 #define MOXA_MUST_MU150_HWID 0x01
62 #define MOXA_MUST_MU860_HWID 0x02
63
64 #define WAKEUP_CHARS 256
65
66 #define UART_MCR_AFE 0x20
67 #define UART_LSR_SPECIAL 0x1E
68
69 #define PCI_DEVICE_ID_POS104UL 0x1044
70 #define PCI_DEVICE_ID_CB108 0x1080
71 #define PCI_DEVICE_ID_CP102UF 0x1023
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 };
144
145 /* driver_data correspond to the lines in the structure above
146 see also ISA probe function before you change something */
147 static struct pci_device_id mxser_pcibrds[] = {
148 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168), .driver_data = 3 },
149 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104), .driver_data = 4 },
150 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132), .driver_data = 8 },
151 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114), .driver_data = 9 },
152 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114), .driver_data = 10 },
153 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102), .driver_data = 11 },
154 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 },
155 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 },
156 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 },
157 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 },
158 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 },
159 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 },
160 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 },
161 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 },
162 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 },
163 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 },
164 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 },
165 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 },
166 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108), .driver_data = 24 },
167 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114), .driver_data = 25 },
168 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I), .driver_data = 26 },
169 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U), .driver_data = 27 },
170 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL), .driver_data = 28 },
171 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL), .driver_data = 29 },
172 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP102UF), .driver_data = 30 },
173 { }
174 };
175 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
176
177 static unsigned long ioaddr[MXSER_BOARDS];
178 static int ttymajor = MXSERMAJOR;
179
180 /* Variables for insmod */
181
182 MODULE_AUTHOR("Casper Yang");
183 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
184 module_param_array(ioaddr, ulong, NULL, 0);
185 MODULE_PARM_DESC(ioaddr, "ISA io addresses to look for a moxa board");
186 module_param(ttymajor, int, 0);
187 MODULE_LICENSE("GPL");
188
189 struct mxser_log {
190 int tick;
191 unsigned long rxcnt[MXSER_PORTS];
192 unsigned long txcnt[MXSER_PORTS];
193 };
194
195 struct mxser_mon {
196 unsigned long rxcnt;
197 unsigned long txcnt;
198 unsigned long up_rxcnt;
199 unsigned long up_txcnt;
200 int modem_status;
201 unsigned char hold_reason;
202 };
203
204 struct mxser_mon_ext {
205 unsigned long rx_cnt[32];
206 unsigned long tx_cnt[32];
207 unsigned long up_rxcnt[32];
208 unsigned long up_txcnt[32];
209 int modem_status[32];
210
211 long baudrate[32];
212 int databits[32];
213 int stopbits[32];
214 int parity[32];
215 int flowctrl[32];
216 int fifo[32];
217 int iftype[32];
218 };
219
220 struct mxser_board;
221
222 struct mxser_port {
223 struct tty_port port;
224 struct mxser_board *board;
225
226 unsigned long ioaddr;
227 unsigned long opmode_ioaddr;
228 int max_baud;
229
230 int rx_high_water;
231 int rx_trigger; /* Rx fifo trigger level */
232 int rx_low_water;
233 int baud_base; /* max. speed */
234 int type; /* UART type */
235
236 int x_char; /* xon/xoff character */
237 int IER; /* Interrupt Enable Register */
238 int MCR; /* Modem control register */
239
240 unsigned char stop_rx;
241 unsigned char ldisc_stop_rx;
242
243 int custom_divisor;
244 unsigned char err_shadow;
245
246 struct async_icount icount; /* kernel counters for 4 input interrupts */
247 int timeout;
248
249 int read_status_mask;
250 int ignore_status_mask;
251 int xmit_fifo_size;
252 int xmit_head;
253 int xmit_tail;
254 int xmit_cnt;
255
256 struct ktermios normal_termios;
257
258 struct mxser_mon mon_data;
259
260 spinlock_t slock;
261 wait_queue_head_t delta_msr_wait;
262 };
263
264 struct mxser_board {
265 unsigned int idx;
266 int irq;
267 const struct mxser_cardinfo *info;
268 unsigned long vector;
269 unsigned long vector_mask;
270
271 int chip_flag;
272 int uart_type;
273
274 struct mxser_port ports[MXSER_PORTS_PER_BOARD];
275 };
276
277 struct mxser_mstatus {
278 tcflag_t cflag;
279 int cts;
280 int dsr;
281 int ri;
282 int dcd;
283 };
284
285 static struct mxser_board mxser_boards[MXSER_BOARDS];
286 static struct tty_driver *mxvar_sdriver;
287 static struct mxser_log mxvar_log;
288 static int mxser_set_baud_method[MXSER_PORTS + 1];
289
290 static void mxser_enable_must_enchance_mode(unsigned long baseio)
291 {
292 u8 oldlcr;
293 u8 efr;
294
295 oldlcr = inb(baseio + UART_LCR);
296 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
297
298 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
299 efr |= MOXA_MUST_EFR_EFRB_ENABLE;
300
301 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
302 outb(oldlcr, baseio + UART_LCR);
303 }
304
305 static void mxser_disable_must_enchance_mode(unsigned long baseio)
306 {
307 u8 oldlcr;
308 u8 efr;
309
310 oldlcr = inb(baseio + UART_LCR);
311 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
312
313 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
314 efr &= ~MOXA_MUST_EFR_EFRB_ENABLE;
315
316 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
317 outb(oldlcr, baseio + UART_LCR);
318 }
319
320 static void mxser_set_must_xon1_value(unsigned long baseio, u8 value)
321 {
322 u8 oldlcr;
323 u8 efr;
324
325 oldlcr = inb(baseio + UART_LCR);
326 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
327
328 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
329 efr &= ~MOXA_MUST_EFR_BANK_MASK;
330 efr |= MOXA_MUST_EFR_BANK0;
331
332 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
333 outb(value, baseio + MOXA_MUST_XON1_REGISTER);
334 outb(oldlcr, baseio + UART_LCR);
335 }
336
337 static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value)
338 {
339 u8 oldlcr;
340 u8 efr;
341
342 oldlcr = inb(baseio + UART_LCR);
343 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
344
345 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
346 efr &= ~MOXA_MUST_EFR_BANK_MASK;
347 efr |= MOXA_MUST_EFR_BANK0;
348
349 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
350 outb(value, baseio + MOXA_MUST_XOFF1_REGISTER);
351 outb(oldlcr, baseio + UART_LCR);
352 }
353
354 static void mxser_set_must_fifo_value(struct mxser_port *info)
355 {
356 u8 oldlcr;
357 u8 efr;
358
359 oldlcr = inb(info->ioaddr + UART_LCR);
360 outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR);
361
362 efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER);
363 efr &= ~MOXA_MUST_EFR_BANK_MASK;
364 efr |= MOXA_MUST_EFR_BANK1;
365
366 outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER);
367 outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER);
368 outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER);
369 outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER);
370 outb(oldlcr, info->ioaddr + UART_LCR);
371 }
372
373 static void mxser_set_must_enum_value(unsigned long baseio, u8 value)
374 {
375 u8 oldlcr;
376 u8 efr;
377
378 oldlcr = inb(baseio + UART_LCR);
379 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
380
381 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
382 efr &= ~MOXA_MUST_EFR_BANK_MASK;
383 efr |= MOXA_MUST_EFR_BANK2;
384
385 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
386 outb(value, baseio + MOXA_MUST_ENUM_REGISTER);
387 outb(oldlcr, baseio + UART_LCR);
388 }
389
390 static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId)
391 {
392 u8 oldlcr;
393 u8 efr;
394
395 oldlcr = inb(baseio + UART_LCR);
396 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
397
398 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
399 efr &= ~MOXA_MUST_EFR_BANK_MASK;
400 efr |= MOXA_MUST_EFR_BANK2;
401
402 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
403 *pId = inb(baseio + MOXA_MUST_HWID_REGISTER);
404 outb(oldlcr, baseio + UART_LCR);
405 }
406
407 static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio)
408 {
409 u8 oldlcr;
410 u8 efr;
411
412 oldlcr = inb(baseio + UART_LCR);
413 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
414
415 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
416 efr &= ~MOXA_MUST_EFR_SF_MASK;
417
418 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
419 outb(oldlcr, baseio + UART_LCR);
420 }
421
422 static void mxser_enable_must_tx_software_flow_control(unsigned long baseio)
423 {
424 u8 oldlcr;
425 u8 efr;
426
427 oldlcr = inb(baseio + UART_LCR);
428 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
429
430 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
431 efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
432 efr |= MOXA_MUST_EFR_SF_TX1;
433
434 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
435 outb(oldlcr, baseio + UART_LCR);
436 }
437
438 static void mxser_disable_must_tx_software_flow_control(unsigned long baseio)
439 {
440 u8 oldlcr;
441 u8 efr;
442
443 oldlcr = inb(baseio + UART_LCR);
444 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
445
446 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
447 efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
448
449 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
450 outb(oldlcr, baseio + UART_LCR);
451 }
452
453 static void mxser_enable_must_rx_software_flow_control(unsigned long baseio)
454 {
455 u8 oldlcr;
456 u8 efr;
457
458 oldlcr = inb(baseio + UART_LCR);
459 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
460
461 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
462 efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
463 efr |= MOXA_MUST_EFR_SF_RX1;
464
465 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
466 outb(oldlcr, baseio + UART_LCR);
467 }
468
469 static void mxser_disable_must_rx_software_flow_control(unsigned long baseio)
470 {
471 u8 oldlcr;
472 u8 efr;
473
474 oldlcr = inb(baseio + UART_LCR);
475 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
476
477 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
478 efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
479
480 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
481 outb(oldlcr, baseio + UART_LCR);
482 }
483
484 #ifdef CONFIG_PCI
485 static int __devinit CheckIsMoxaMust(unsigned long io)
486 {
487 u8 oldmcr, hwid;
488 int i;
489
490 outb(0, io + UART_LCR);
491 mxser_disable_must_enchance_mode(io);
492 oldmcr = inb(io + UART_MCR);
493 outb(0, io + UART_MCR);
494 mxser_set_must_xon1_value(io, 0x11);
495 if ((hwid = inb(io + UART_MCR)) != 0) {
496 outb(oldmcr, io + UART_MCR);
497 return MOXA_OTHER_UART;
498 }
499
500 mxser_get_must_hardware_id(io, &hwid);
501 for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
502 if (hwid == Gpci_uart_info[i].type)
503 return (int)hwid;
504 }
505 return MOXA_OTHER_UART;
506 }
507 #endif
508
509 static void process_txrx_fifo(struct mxser_port *info)
510 {
511 int i;
512
513 if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
514 info->rx_trigger = 1;
515 info->rx_high_water = 1;
516 info->rx_low_water = 1;
517 info->xmit_fifo_size = 1;
518 } else
519 for (i = 0; i < UART_INFO_NUM; i++)
520 if (info->board->chip_flag == Gpci_uart_info[i].type) {
521 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
522 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
523 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
524 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
525 break;
526 }
527 }
528
529 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
530 {
531 static unsigned char mxser_msr[MXSER_PORTS + 1];
532 unsigned char status = 0;
533
534 status = inb(baseaddr + UART_MSR);
535
536 mxser_msr[port] &= 0x0F;
537 mxser_msr[port] |= status;
538 status = mxser_msr[port];
539 if (mode)
540 mxser_msr[port] = 0;
541
542 return status;
543 }
544
545 static int mxser_carrier_raised(struct tty_port *port)
546 {
547 struct mxser_port *mp = container_of(port, struct mxser_port, port);
548 return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0;
549 }
550
551 static void mxser_dtr_rts(struct tty_port *port, int on)
552 {
553 struct mxser_port *mp = container_of(port, struct mxser_port, port);
554 unsigned long flags;
555
556 spin_lock_irqsave(&mp->slock, flags);
557 if (on)
558 outb(inb(mp->ioaddr + UART_MCR) |
559 UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR);
560 else
561 outb(inb(mp->ioaddr + UART_MCR)&~(UART_MCR_DTR | UART_MCR_RTS),
562 mp->ioaddr + UART_MCR);
563 spin_unlock_irqrestore(&mp->slock, flags);
564 }
565
566 static int mxser_set_baud(struct tty_struct *tty, long newspd)
567 {
568 struct mxser_port *info = tty->driver_data;
569 int quot = 0, baud;
570 unsigned char cval;
571
572 if (!info->ioaddr)
573 return -1;
574
575 if (newspd > info->max_baud)
576 return -1;
577
578 if (newspd == 134) {
579 quot = 2 * info->baud_base / 269;
580 tty_encode_baud_rate(tty, 134, 134);
581 } else if (newspd) {
582 quot = info->baud_base / newspd;
583 if (quot == 0)
584 quot = 1;
585 baud = info->baud_base/quot;
586 tty_encode_baud_rate(tty, baud, baud);
587 } else {
588 quot = 0;
589 }
590
591 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
592 info->timeout += HZ / 50; /* Add .02 seconds of slop */
593
594 if (quot) {
595 info->MCR |= UART_MCR_DTR;
596 outb(info->MCR, info->ioaddr + UART_MCR);
597 } else {
598 info->MCR &= ~UART_MCR_DTR;
599 outb(info->MCR, info->ioaddr + UART_MCR);
600 return 0;
601 }
602
603 cval = inb(info->ioaddr + UART_LCR);
604
605 outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
606
607 outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
608 outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
609 outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
610
611 #ifdef BOTHER
612 if (C_BAUD(tty) == BOTHER) {
613 quot = info->baud_base % newspd;
614 quot *= 8;
615 if (quot % newspd > newspd / 2) {
616 quot /= newspd;
617 quot++;
618 } else
619 quot /= newspd;
620
621 mxser_set_must_enum_value(info->ioaddr, quot);
622 } else
623 #endif
624 mxser_set_must_enum_value(info->ioaddr, 0);
625
626 return 0;
627 }
628
629 /*
630 * This routine is called to set the UART divisor registers to match
631 * the specified baud rate for a serial port.
632 */
633 static int mxser_change_speed(struct tty_struct *tty,
634 struct ktermios *old_termios)
635 {
636 struct mxser_port *info = tty->driver_data;
637 unsigned cflag, cval, fcr;
638 int ret = 0;
639 unsigned char status;
640
641 cflag = tty->termios->c_cflag;
642 if (!info->ioaddr)
643 return ret;
644
645 if (mxser_set_baud_method[tty->index] == 0)
646 mxser_set_baud(tty, tty_get_baud_rate(tty));
647
648 /* byte size and parity */
649 switch (cflag & CSIZE) {
650 case CS5:
651 cval = 0x00;
652 break;
653 case CS6:
654 cval = 0x01;
655 break;
656 case CS7:
657 cval = 0x02;
658 break;
659 case CS8:
660 cval = 0x03;
661 break;
662 default:
663 cval = 0x00;
664 break; /* too keep GCC shut... */
665 }
666 if (cflag & CSTOPB)
667 cval |= 0x04;
668 if (cflag & PARENB)
669 cval |= UART_LCR_PARITY;
670 if (!(cflag & PARODD))
671 cval |= UART_LCR_EPAR;
672 if (cflag & CMSPAR)
673 cval |= UART_LCR_SPAR;
674
675 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
676 if (info->board->chip_flag) {
677 fcr = UART_FCR_ENABLE_FIFO;
678 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
679 mxser_set_must_fifo_value(info);
680 } else
681 fcr = 0;
682 } else {
683 fcr = UART_FCR_ENABLE_FIFO;
684 if (info->board->chip_flag) {
685 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
686 mxser_set_must_fifo_value(info);
687 } else {
688 switch (info->rx_trigger) {
689 case 1:
690 fcr |= UART_FCR_TRIGGER_1;
691 break;
692 case 4:
693 fcr |= UART_FCR_TRIGGER_4;
694 break;
695 case 8:
696 fcr |= UART_FCR_TRIGGER_8;
697 break;
698 default:
699 fcr |= UART_FCR_TRIGGER_14;
700 break;
701 }
702 }
703 }
704
705 /* CTS flow control flag and modem status interrupts */
706 info->IER &= ~UART_IER_MSI;
707 info->MCR &= ~UART_MCR_AFE;
708 if (cflag & CRTSCTS) {
709 info->port.flags |= ASYNC_CTS_FLOW;
710 info->IER |= UART_IER_MSI;
711 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
712 info->MCR |= UART_MCR_AFE;
713 } else {
714 status = inb(info->ioaddr + UART_MSR);
715 if (tty->hw_stopped) {
716 if (status & UART_MSR_CTS) {
717 tty->hw_stopped = 0;
718 if (info->type != PORT_16550A &&
719 !info->board->chip_flag) {
720 outb(info->IER & ~UART_IER_THRI,
721 info->ioaddr +
722 UART_IER);
723 info->IER |= UART_IER_THRI;
724 outb(info->IER, info->ioaddr +
725 UART_IER);
726 }
727 tty_wakeup(tty);
728 }
729 } else {
730 if (!(status & UART_MSR_CTS)) {
731 tty->hw_stopped = 1;
732 if ((info->type != PORT_16550A) &&
733 (!info->board->chip_flag)) {
734 info->IER &= ~UART_IER_THRI;
735 outb(info->IER, info->ioaddr +
736 UART_IER);
737 }
738 }
739 }
740 }
741 } else {
742 info->port.flags &= ~ASYNC_CTS_FLOW;
743 }
744 outb(info->MCR, info->ioaddr + UART_MCR);
745 if (cflag & CLOCAL) {
746 info->port.flags &= ~ASYNC_CHECK_CD;
747 } else {
748 info->port.flags |= ASYNC_CHECK_CD;
749 info->IER |= UART_IER_MSI;
750 }
751 outb(info->IER, info->ioaddr + UART_IER);
752
753 /*
754 * Set up parity check flag
755 */
756 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
757 if (I_INPCK(tty))
758 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
759 if (I_BRKINT(tty) || I_PARMRK(tty))
760 info->read_status_mask |= UART_LSR_BI;
761
762 info->ignore_status_mask = 0;
763
764 if (I_IGNBRK(tty)) {
765 info->ignore_status_mask |= UART_LSR_BI;
766 info->read_status_mask |= UART_LSR_BI;
767 /*
768 * If we're ignore parity and break indicators, ignore
769 * overruns too. (For real raw support).
770 */
771 if (I_IGNPAR(tty)) {
772 info->ignore_status_mask |=
773 UART_LSR_OE |
774 UART_LSR_PE |
775 UART_LSR_FE;
776 info->read_status_mask |=
777 UART_LSR_OE |
778 UART_LSR_PE |
779 UART_LSR_FE;
780 }
781 }
782 if (info->board->chip_flag) {
783 mxser_set_must_xon1_value(info->ioaddr, START_CHAR(tty));
784 mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(tty));
785 if (I_IXON(tty)) {
786 mxser_enable_must_rx_software_flow_control(
787 info->ioaddr);
788 } else {
789 mxser_disable_must_rx_software_flow_control(
790 info->ioaddr);
791 }
792 if (I_IXOFF(tty)) {
793 mxser_enable_must_tx_software_flow_control(
794 info->ioaddr);
795 } else {
796 mxser_disable_must_tx_software_flow_control(
797 info->ioaddr);
798 }
799 }
800
801
802 outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
803 outb(cval, info->ioaddr + UART_LCR);
804
805 return ret;
806 }
807
808 static void mxser_check_modem_status(struct tty_struct *tty,
809 struct mxser_port *port, int status)
810 {
811 /* update input line counters */
812 if (status & UART_MSR_TERI)
813 port->icount.rng++;
814 if (status & UART_MSR_DDSR)
815 port->icount.dsr++;
816 if (status & UART_MSR_DDCD)
817 port->icount.dcd++;
818 if (status & UART_MSR_DCTS)
819 port->icount.cts++;
820 port->mon_data.modem_status = status;
821 wake_up_interruptible(&port->delta_msr_wait);
822
823 if ((port->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
824 if (status & UART_MSR_DCD)
825 wake_up_interruptible(&port->port.open_wait);
826 }
827
828 if (port->port.flags & ASYNC_CTS_FLOW) {
829 if (tty->hw_stopped) {
830 if (status & UART_MSR_CTS) {
831 tty->hw_stopped = 0;
832
833 if ((port->type != PORT_16550A) &&
834 (!port->board->chip_flag)) {
835 outb(port->IER & ~UART_IER_THRI,
836 port->ioaddr + UART_IER);
837 port->IER |= UART_IER_THRI;
838 outb(port->IER, port->ioaddr +
839 UART_IER);
840 }
841 tty_wakeup(tty);
842 }
843 } else {
844 if (!(status & UART_MSR_CTS)) {
845 tty->hw_stopped = 1;
846 if (port->type != PORT_16550A &&
847 !port->board->chip_flag) {
848 port->IER &= ~UART_IER_THRI;
849 outb(port->IER, port->ioaddr +
850 UART_IER);
851 }
852 }
853 }
854 }
855 }
856
857 static int mxser_startup(struct tty_struct *tty)
858 {
859 struct mxser_port *info = tty->driver_data;
860 unsigned long page;
861 unsigned long flags;
862
863 page = __get_free_page(GFP_KERNEL);
864 if (!page)
865 return -ENOMEM;
866
867 spin_lock_irqsave(&info->slock, flags);
868
869 if (info->port.flags & ASYNC_INITIALIZED) {
870 free_page(page);
871 spin_unlock_irqrestore(&info->slock, flags);
872 return 0;
873 }
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 if (info->port.xmit_buf)
882 free_page(page);
883 else
884 info->port.xmit_buf = (unsigned char *) page;
885
886 /*
887 * Clear the FIFO buffers and disable them
888 * (they will be reenabled in mxser_change_speed())
889 */
890 if (info->board->chip_flag)
891 outb((UART_FCR_CLEAR_RCVR |
892 UART_FCR_CLEAR_XMIT |
893 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
894 else
895 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
896 info->ioaddr + UART_FCR);
897
898 /*
899 * At this point there's no way the LSR could still be 0xFF;
900 * if it is, then bail out, because there's likely no UART
901 * here.
902 */
903 if (inb(info->ioaddr + UART_LSR) == 0xff) {
904 spin_unlock_irqrestore(&info->slock, flags);
905 if (capable(CAP_SYS_ADMIN)) {
906 if (tty)
907 set_bit(TTY_IO_ERROR, &tty->flags);
908 return 0;
909 } else
910 return -ENODEV;
911 }
912
913 /*
914 * Clear the interrupt registers.
915 */
916 (void) inb(info->ioaddr + UART_LSR);
917 (void) inb(info->ioaddr + UART_RX);
918 (void) inb(info->ioaddr + UART_IIR);
919 (void) inb(info->ioaddr + UART_MSR);
920
921 /*
922 * Now, initialize the UART
923 */
924 outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
925 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
926 outb(info->MCR, info->ioaddr + UART_MCR);
927
928 /*
929 * Finally, enable interrupts
930 */
931 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
932
933 if (info->board->chip_flag)
934 info->IER |= MOXA_MUST_IER_EGDAI;
935 outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
936
937 /*
938 * And clear the interrupt registers again for luck.
939 */
940 (void) inb(info->ioaddr + UART_LSR);
941 (void) inb(info->ioaddr + UART_RX);
942 (void) inb(info->ioaddr + UART_IIR);
943 (void) inb(info->ioaddr + UART_MSR);
944
945 clear_bit(TTY_IO_ERROR, &tty->flags);
946 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
947
948 /*
949 * and set the speed of the serial port
950 */
951 mxser_change_speed(tty, NULL);
952 info->port.flags |= ASYNC_INITIALIZED;
953 spin_unlock_irqrestore(&info->slock, flags);
954
955 return 0;
956 }
957
958 /*
959 * This routine will shutdown a serial port; interrupts maybe disabled, and
960 * DTR is dropped if the hangup on close termio flag is on.
961 */
962 static void mxser_shutdown(struct tty_struct *tty)
963 {
964 struct mxser_port *info = tty->driver_data;
965 unsigned long flags;
966
967 if (!(info->port.flags & ASYNC_INITIALIZED))
968 return;
969
970 spin_lock_irqsave(&info->slock, flags);
971
972 /*
973 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
974 * here so the queue might never be waken up
975 */
976 wake_up_interruptible(&info->delta_msr_wait);
977
978 /*
979 * Free the IRQ, if necessary
980 */
981 if (info->port.xmit_buf) {
982 free_page((unsigned long) info->port.xmit_buf);
983 info->port.xmit_buf = NULL;
984 }
985
986 info->IER = 0;
987 outb(0x00, info->ioaddr + UART_IER);
988
989 if (tty->termios->c_cflag & HUPCL)
990 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
991 outb(info->MCR, info->ioaddr + UART_MCR);
992
993 /* clear Rx/Tx FIFO's */
994 if (info->board->chip_flag)
995 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
996 MOXA_MUST_FCR_GDA_MODE_ENABLE,
997 info->ioaddr + UART_FCR);
998 else
999 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
1000 info->ioaddr + UART_FCR);
1001
1002 /* read data port to reset things */
1003 (void) inb(info->ioaddr + UART_RX);
1004
1005 set_bit(TTY_IO_ERROR, &tty->flags);
1006
1007 info->port.flags &= ~ASYNC_INITIALIZED;
1008
1009 if (info->board->chip_flag)
1010 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
1011
1012 spin_unlock_irqrestore(&info->slock, flags);
1013 }
1014
1015 /*
1016 * This routine is called whenever a serial port is opened. It
1017 * enables interrupts for a serial port, linking in its async structure into
1018 * the IRQ chain. It also performs the serial-specific
1019 * initialization for the tty structure.
1020 */
1021 static int mxser_open(struct tty_struct *tty, struct file *filp)
1022 {
1023 struct mxser_port *info;
1024 unsigned long flags;
1025 int retval, line;
1026
1027 line = tty->index;
1028 if (line == MXSER_PORTS)
1029 return 0;
1030 if (line < 0 || line > MXSER_PORTS)
1031 return -ENODEV;
1032 info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
1033 if (!info->ioaddr)
1034 return -ENODEV;
1035
1036 tty->driver_data = info;
1037 tty_port_tty_set(&info->port, tty);
1038 /*
1039 * Start up serial port
1040 */
1041 spin_lock_irqsave(&info->port.lock, flags);
1042 info->port.count++;
1043 spin_unlock_irqrestore(&info->port.lock, flags);
1044 retval = mxser_startup(tty);
1045 if (retval)
1046 return retval;
1047
1048 retval = tty_port_block_til_ready(&info->port, tty, filp);
1049 if (retval)
1050 return retval;
1051
1052 return 0;
1053 }
1054
1055 static void mxser_flush_buffer(struct tty_struct *tty)
1056 {
1057 struct mxser_port *info = tty->driver_data;
1058 char fcr;
1059 unsigned long flags;
1060
1061
1062 spin_lock_irqsave(&info->slock, flags);
1063 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1064
1065 fcr = inb(info->ioaddr + UART_FCR);
1066 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1067 info->ioaddr + UART_FCR);
1068 outb(fcr, info->ioaddr + UART_FCR);
1069
1070 spin_unlock_irqrestore(&info->slock, flags);
1071
1072 tty_wakeup(tty);
1073 }
1074
1075
1076 /*
1077 * This routine is called when the serial port gets closed. First, we
1078 * wait for the last remaining data to be sent. Then, we unlink its
1079 * async structure from the interrupt chain if necessary, and we free
1080 * that IRQ if nothing is left in the chain.
1081 */
1082 static void mxser_close(struct tty_struct *tty, struct file *filp)
1083 {
1084 struct mxser_port *info = tty->driver_data;
1085 struct tty_port *port = &info->port;
1086
1087 unsigned long timeout;
1088
1089 if (tty->index == MXSER_PORTS)
1090 return;
1091 if (!info)
1092 return;
1093
1094 if (tty_port_close_start(port, tty, filp) == 0)
1095 return;
1096
1097 /*
1098 * Save the termios structure, since this port may have
1099 * separate termios for callout and dialin.
1100 *
1101 * FIXME: Can this go ?
1102 */
1103 if (info->port.flags & ASYNC_NORMAL_ACTIVE)
1104 info->normal_termios = *tty->termios;
1105 /*
1106 * At this point we stop accepting input. To do this, we
1107 * disable the receive line status interrupts, and tell the
1108 * interrupt driver to stop checking the data ready bit in the
1109 * line status register.
1110 */
1111 info->IER &= ~UART_IER_RLSI;
1112 if (info->board->chip_flag)
1113 info->IER &= ~MOXA_MUST_RECV_ISR;
1114
1115 if (info->port.flags & ASYNC_INITIALIZED) {
1116 outb(info->IER, info->ioaddr + UART_IER);
1117 /*
1118 * Before we drop DTR, make sure the UART transmitter
1119 * has completely drained; this is especially
1120 * important if there is a transmit FIFO!
1121 */
1122 timeout = jiffies + HZ;
1123 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1124 schedule_timeout_interruptible(5);
1125 if (time_after(jiffies, timeout))
1126 break;
1127 }
1128 }
1129 mxser_shutdown(tty);
1130 mxser_flush_buffer(tty);
1131
1132 /* Right now the tty_port set is done outside of the close_end helper
1133 as we don't yet have everyone using refcounts */
1134 tty_port_close_end(port, tty);
1135 tty_port_tty_set(port, NULL);
1136 }
1137
1138 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1139 {
1140 int c, total = 0;
1141 struct mxser_port *info = tty->driver_data;
1142 unsigned long flags;
1143
1144 if (!info->port.xmit_buf)
1145 return 0;
1146
1147 while (1) {
1148 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1149 SERIAL_XMIT_SIZE - info->xmit_head));
1150 if (c <= 0)
1151 break;
1152
1153 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
1154 spin_lock_irqsave(&info->slock, flags);
1155 info->xmit_head = (info->xmit_head + c) &
1156 (SERIAL_XMIT_SIZE - 1);
1157 info->xmit_cnt += c;
1158 spin_unlock_irqrestore(&info->slock, flags);
1159
1160 buf += c;
1161 count -= c;
1162 total += c;
1163 }
1164
1165 if (info->xmit_cnt && !tty->stopped) {
1166 if (!tty->hw_stopped ||
1167 (info->type == PORT_16550A) ||
1168 (info->board->chip_flag)) {
1169 spin_lock_irqsave(&info->slock, flags);
1170 outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1171 UART_IER);
1172 info->IER |= UART_IER_THRI;
1173 outb(info->IER, info->ioaddr + UART_IER);
1174 spin_unlock_irqrestore(&info->slock, flags);
1175 }
1176 }
1177 return total;
1178 }
1179
1180 static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
1181 {
1182 struct mxser_port *info = tty->driver_data;
1183 unsigned long flags;
1184
1185 if (!info->port.xmit_buf)
1186 return 0;
1187
1188 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1189 return 0;
1190
1191 spin_lock_irqsave(&info->slock, flags);
1192 info->port.xmit_buf[info->xmit_head++] = ch;
1193 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1194 info->xmit_cnt++;
1195 spin_unlock_irqrestore(&info->slock, flags);
1196 if (!tty->stopped) {
1197 if (!tty->hw_stopped ||
1198 (info->type == PORT_16550A) ||
1199 info->board->chip_flag) {
1200 spin_lock_irqsave(&info->slock, flags);
1201 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1202 info->IER |= UART_IER_THRI;
1203 outb(info->IER, info->ioaddr + UART_IER);
1204 spin_unlock_irqrestore(&info->slock, flags);
1205 }
1206 }
1207 return 1;
1208 }
1209
1210
1211 static void mxser_flush_chars(struct tty_struct *tty)
1212 {
1213 struct mxser_port *info = tty->driver_data;
1214 unsigned long flags;
1215
1216 if (info->xmit_cnt <= 0 || tty->stopped || !info->port.xmit_buf ||
1217 (tty->hw_stopped && info->type != PORT_16550A &&
1218 !info->board->chip_flag))
1219 return;
1220
1221 spin_lock_irqsave(&info->slock, flags);
1222
1223 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1224 info->IER |= UART_IER_THRI;
1225 outb(info->IER, info->ioaddr + UART_IER);
1226
1227 spin_unlock_irqrestore(&info->slock, flags);
1228 }
1229
1230 static int mxser_write_room(struct tty_struct *tty)
1231 {
1232 struct mxser_port *info = tty->driver_data;
1233 int ret;
1234
1235 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1236 return ret < 0 ? 0 : ret;
1237 }
1238
1239 static int mxser_chars_in_buffer(struct tty_struct *tty)
1240 {
1241 struct mxser_port *info = tty->driver_data;
1242 return info->xmit_cnt;
1243 }
1244
1245 /*
1246 * ------------------------------------------------------------
1247 * friends of mxser_ioctl()
1248 * ------------------------------------------------------------
1249 */
1250 static int mxser_get_serial_info(struct tty_struct *tty,
1251 struct serial_struct __user *retinfo)
1252 {
1253 struct mxser_port *info = tty->driver_data;
1254 struct serial_struct tmp = {
1255 .type = info->type,
1256 .line = tty->index,
1257 .port = info->ioaddr,
1258 .irq = info->board->irq,
1259 .flags = info->port.flags,
1260 .baud_base = info->baud_base,
1261 .close_delay = info->port.close_delay,
1262 .closing_wait = info->port.closing_wait,
1263 .custom_divisor = info->custom_divisor,
1264 .hub6 = 0
1265 };
1266 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1267 return -EFAULT;
1268 return 0;
1269 }
1270
1271 static int mxser_set_serial_info(struct tty_struct *tty,
1272 struct serial_struct __user *new_info)
1273 {
1274 struct mxser_port *info = tty->driver_data;
1275 struct serial_struct new_serial;
1276 speed_t baud;
1277 unsigned long sl_flags;
1278 unsigned int flags;
1279 int retval = 0;
1280
1281 if (!new_info || !info->ioaddr)
1282 return -ENODEV;
1283 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1284 return -EFAULT;
1285
1286 if (new_serial.irq != info->board->irq ||
1287 new_serial.port != info->ioaddr)
1288 return -EINVAL;
1289
1290 flags = info->port.flags & ASYNC_SPD_MASK;
1291
1292 if (!capable(CAP_SYS_ADMIN)) {
1293 if ((new_serial.baud_base != info->baud_base) ||
1294 (new_serial.close_delay != info->port.close_delay) ||
1295 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK)))
1296 return -EPERM;
1297 info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
1298 (new_serial.flags & ASYNC_USR_MASK));
1299 } else {
1300 /*
1301 * OK, past this point, all the error checking has been done.
1302 * At this point, we start making changes.....
1303 */
1304 info->port.flags = ((info->port.flags & ~ASYNC_FLAGS) |
1305 (new_serial.flags & ASYNC_FLAGS));
1306 info->port.close_delay = new_serial.close_delay * HZ / 100;
1307 info->port.closing_wait = new_serial.closing_wait * HZ / 100;
1308 tty->low_latency = (info->port.flags & ASYNC_LOW_LATENCY)
1309 ? 1 : 0;
1310 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
1311 (new_serial.baud_base != info->baud_base ||
1312 new_serial.custom_divisor !=
1313 info->custom_divisor)) {
1314 baud = new_serial.baud_base / new_serial.custom_divisor;
1315 tty_encode_baud_rate(tty, baud, baud);
1316 }
1317 }
1318
1319 info->type = new_serial.type;
1320
1321 process_txrx_fifo(info);
1322
1323 if (info->port.flags & ASYNC_INITIALIZED) {
1324 if (flags != (info->port.flags & ASYNC_SPD_MASK)) {
1325 spin_lock_irqsave(&info->slock, sl_flags);
1326 mxser_change_speed(tty, NULL);
1327 spin_unlock_irqrestore(&info->slock, sl_flags);
1328 }
1329 } else
1330 retval = mxser_startup(tty);
1331
1332 return retval;
1333 }
1334
1335 /*
1336 * mxser_get_lsr_info - get line status register info
1337 *
1338 * Purpose: Let user call ioctl() to get info when the UART physically
1339 * is emptied. On bus types like RS485, the transmitter must
1340 * release the bus after transmitting. This must be done when
1341 * the transmit shift register is empty, not be done when the
1342 * transmit holding register is empty. This functionality
1343 * allows an RS485 driver to be written in user space.
1344 */
1345 static int mxser_get_lsr_info(struct mxser_port *info,
1346 unsigned int __user *value)
1347 {
1348 unsigned char status;
1349 unsigned int result;
1350 unsigned long flags;
1351
1352 spin_lock_irqsave(&info->slock, flags);
1353 status = inb(info->ioaddr + UART_LSR);
1354 spin_unlock_irqrestore(&info->slock, flags);
1355 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1356 return put_user(result, value);
1357 }
1358
1359 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
1360 {
1361 struct mxser_port *info = tty->driver_data;
1362 unsigned char control, status;
1363 unsigned long flags;
1364
1365
1366 if (tty->index == MXSER_PORTS)
1367 return -ENOIOCTLCMD;
1368 if (test_bit(TTY_IO_ERROR, &tty->flags))
1369 return -EIO;
1370
1371 control = info->MCR;
1372
1373 spin_lock_irqsave(&info->slock, flags);
1374 status = inb(info->ioaddr + UART_MSR);
1375 if (status & UART_MSR_ANY_DELTA)
1376 mxser_check_modem_status(tty, info, status);
1377 spin_unlock_irqrestore(&info->slock, flags);
1378 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1379 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1380 ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1381 ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1382 ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1383 ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1384 }
1385
1386 static int mxser_tiocmset(struct tty_struct *tty, struct file *file,
1387 unsigned int set, unsigned int clear)
1388 {
1389 struct mxser_port *info = tty->driver_data;
1390 unsigned long flags;
1391
1392
1393 if (tty->index == MXSER_PORTS)
1394 return -ENOIOCTLCMD;
1395 if (test_bit(TTY_IO_ERROR, &tty->flags))
1396 return -EIO;
1397
1398 spin_lock_irqsave(&info->slock, flags);
1399
1400 if (set & TIOCM_RTS)
1401 info->MCR |= UART_MCR_RTS;
1402 if (set & TIOCM_DTR)
1403 info->MCR |= UART_MCR_DTR;
1404
1405 if (clear & TIOCM_RTS)
1406 info->MCR &= ~UART_MCR_RTS;
1407 if (clear & TIOCM_DTR)
1408 info->MCR &= ~UART_MCR_DTR;
1409
1410 outb(info->MCR, info->ioaddr + UART_MCR);
1411 spin_unlock_irqrestore(&info->slock, flags);
1412 return 0;
1413 }
1414
1415 static int __init mxser_program_mode(int port)
1416 {
1417 int id, i, j, n;
1418
1419 outb(0, port);
1420 outb(0, port);
1421 outb(0, port);
1422 (void)inb(port);
1423 (void)inb(port);
1424 outb(0, port);
1425 (void)inb(port);
1426
1427 id = inb(port + 1) & 0x1F;
1428 if ((id != C168_ASIC_ID) &&
1429 (id != C104_ASIC_ID) &&
1430 (id != C102_ASIC_ID) &&
1431 (id != CI132_ASIC_ID) &&
1432 (id != CI134_ASIC_ID) &&
1433 (id != CI104J_ASIC_ID))
1434 return -1;
1435 for (i = 0, j = 0; i < 4; i++) {
1436 n = inb(port + 2);
1437 if (n == 'M') {
1438 j = 1;
1439 } else if ((j == 1) && (n == 1)) {
1440 j = 2;
1441 break;
1442 } else
1443 j = 0;
1444 }
1445 if (j != 2)
1446 id = -2;
1447 return id;
1448 }
1449
1450 static void __init mxser_normal_mode(int port)
1451 {
1452 int i, n;
1453
1454 outb(0xA5, port + 1);
1455 outb(0x80, port + 3);
1456 outb(12, port + 0); /* 9600 bps */
1457 outb(0, port + 1);
1458 outb(0x03, port + 3); /* 8 data bits */
1459 outb(0x13, port + 4); /* loop back mode */
1460 for (i = 0; i < 16; i++) {
1461 n = inb(port + 5);
1462 if ((n & 0x61) == 0x60)
1463 break;
1464 if ((n & 1) == 1)
1465 (void)inb(port);
1466 }
1467 outb(0x00, port + 4);
1468 }
1469
1470 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1471 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1472 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1473 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1474 #define EN_CCMD 0x000 /* Chip's command register */
1475 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1476 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1477 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1478 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1479 #define EN0_DCFG 0x00E /* Data configuration reg WR */
1480 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1481 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1482 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
1483 static int __init mxser_read_register(int port, unsigned short *regs)
1484 {
1485 int i, k, value, id;
1486 unsigned int j;
1487
1488 id = mxser_program_mode(port);
1489 if (id < 0)
1490 return id;
1491 for (i = 0; i < 14; i++) {
1492 k = (i & 0x3F) | 0x180;
1493 for (j = 0x100; j > 0; j >>= 1) {
1494 outb(CHIP_CS, port);
1495 if (k & j) {
1496 outb(CHIP_CS | CHIP_DO, port);
1497 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
1498 } else {
1499 outb(CHIP_CS, port);
1500 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
1501 }
1502 }
1503 (void)inb(port);
1504 value = 0;
1505 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1506 outb(CHIP_CS, port);
1507 outb(CHIP_CS | CHIP_SK, port);
1508 if (inb(port) & CHIP_DI)
1509 value |= j;
1510 }
1511 regs[i] = value;
1512 outb(0, port);
1513 }
1514 mxser_normal_mode(port);
1515 return id;
1516 }
1517
1518 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1519 {
1520 struct mxser_port *port;
1521 struct tty_struct *tty;
1522 int result, status;
1523 unsigned int i, j;
1524 int ret = 0;
1525
1526 switch (cmd) {
1527 case MOXA_GET_MAJOR:
1528 if (printk_ratelimit())
1529 printk(KERN_WARNING "mxser: '%s' uses deprecated ioctl "
1530 "%x (GET_MAJOR), fix your userspace\n",
1531 current->comm, cmd);
1532 return put_user(ttymajor, (int __user *)argp);
1533
1534 case MOXA_CHKPORTENABLE:
1535 result = 0;
1536 lock_kernel();
1537 for (i = 0; i < MXSER_BOARDS; i++)
1538 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1539 if (mxser_boards[i].ports[j].ioaddr)
1540 result |= (1 << i);
1541 unlock_kernel();
1542 return put_user(result, (unsigned long __user *)argp);
1543 case MOXA_GETDATACOUNT:
1544 lock_kernel();
1545 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1546 ret = -EFAULT;
1547 unlock_kernel();
1548 return ret;
1549 case MOXA_GETMSTATUS: {
1550 struct mxser_mstatus ms, __user *msu = argp;
1551 lock_kernel();
1552 for (i = 0; i < MXSER_BOARDS; i++)
1553 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1554 port = &mxser_boards[i].ports[j];
1555 memset(&ms, 0, sizeof(ms));
1556
1557 if (!port->ioaddr)
1558 goto copy;
1559
1560 tty = tty_port_tty_get(&port->port);
1561
1562 if (!tty || !tty->termios)
1563 ms.cflag = port->normal_termios.c_cflag;
1564 else
1565 ms.cflag = tty->termios->c_cflag;
1566 tty_kref_put(tty);
1567 status = inb(port->ioaddr + UART_MSR);
1568 if (status & UART_MSR_DCD)
1569 ms.dcd = 1;
1570 if (status & UART_MSR_DSR)
1571 ms.dsr = 1;
1572 if (status & UART_MSR_CTS)
1573 ms.cts = 1;
1574 copy:
1575 if (copy_to_user(msu, &ms, sizeof(ms))) {
1576 unlock_kernel();
1577 return -EFAULT;
1578 }
1579 msu++;
1580 }
1581 unlock_kernel();
1582 return 0;
1583 }
1584 case MOXA_ASPP_MON_EXT: {
1585 struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */
1586 unsigned int cflag, iflag, p;
1587 u8 opmode;
1588
1589 me = kzalloc(sizeof(*me), GFP_KERNEL);
1590 if (!me)
1591 return -ENOMEM;
1592
1593 lock_kernel();
1594 for (i = 0, p = 0; i < MXSER_BOARDS; i++) {
1595 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) {
1596 if (p >= ARRAY_SIZE(me->rx_cnt)) {
1597 i = MXSER_BOARDS;
1598 break;
1599 }
1600 port = &mxser_boards[i].ports[j];
1601 if (!port->ioaddr)
1602 continue;
1603
1604 status = mxser_get_msr(port->ioaddr, 0, p);
1605
1606 if (status & UART_MSR_TERI)
1607 port->icount.rng++;
1608 if (status & UART_MSR_DDSR)
1609 port->icount.dsr++;
1610 if (status & UART_MSR_DDCD)
1611 port->icount.dcd++;
1612 if (status & UART_MSR_DCTS)
1613 port->icount.cts++;
1614
1615 port->mon_data.modem_status = status;
1616 me->rx_cnt[p] = port->mon_data.rxcnt;
1617 me->tx_cnt[p] = port->mon_data.txcnt;
1618 me->up_rxcnt[p] = port->mon_data.up_rxcnt;
1619 me->up_txcnt[p] = port->mon_data.up_txcnt;
1620 me->modem_status[p] =
1621 port->mon_data.modem_status;
1622 tty = tty_port_tty_get(&port->port);
1623
1624 if (!tty || !tty->termios) {
1625 cflag = port->normal_termios.c_cflag;
1626 iflag = port->normal_termios.c_iflag;
1627 me->baudrate[p] = tty_termios_baud_rate(&port->normal_termios);
1628 } else {
1629 cflag = tty->termios->c_cflag;
1630 iflag = tty->termios->c_iflag;
1631 me->baudrate[p] = tty_get_baud_rate(tty);
1632 }
1633 tty_kref_put(tty);
1634
1635 me->databits[p] = cflag & CSIZE;
1636 me->stopbits[p] = cflag & CSTOPB;
1637 me->parity[p] = cflag & (PARENB | PARODD |
1638 CMSPAR);
1639
1640 if (cflag & CRTSCTS)
1641 me->flowctrl[p] |= 0x03;
1642
1643 if (iflag & (IXON | IXOFF))
1644 me->flowctrl[p] |= 0x0C;
1645
1646 if (port->type == PORT_16550A)
1647 me->fifo[p] = 1;
1648
1649 opmode = inb(port->opmode_ioaddr) >>
1650 ((p % 4) * 2);
1651 opmode &= OP_MODE_MASK;
1652 me->iftype[p] = opmode;
1653 }
1654 }
1655 unlock_kernel();
1656 if (copy_to_user(argp, me, sizeof(*me)))
1657 ret = -EFAULT;
1658 kfree(me);
1659 return ret;
1660 }
1661 default:
1662 return -ENOIOCTLCMD;
1663 }
1664 return 0;
1665 }
1666
1667 static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
1668 struct async_icount *cprev)
1669 {
1670 struct async_icount cnow;
1671 unsigned long flags;
1672 int ret;
1673
1674 spin_lock_irqsave(&info->slock, flags);
1675 cnow = info->icount; /* atomic copy */
1676 spin_unlock_irqrestore(&info->slock, flags);
1677
1678 ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1679 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1680 ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
1681 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
1682
1683 *cprev = cnow;
1684
1685 return ret;
1686 }
1687
1688 static int mxser_ioctl(struct tty_struct *tty, struct file *file,
1689 unsigned int cmd, unsigned long arg)
1690 {
1691 struct mxser_port *info = tty->driver_data;
1692 struct async_icount cnow;
1693 unsigned long flags;
1694 void __user *argp = (void __user *)arg;
1695 int retval;
1696
1697 if (tty->index == MXSER_PORTS)
1698 return mxser_ioctl_special(cmd, argp);
1699
1700 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1701 int p;
1702 unsigned long opmode;
1703 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1704 int shiftbit;
1705 unsigned char val, mask;
1706
1707 p = tty->index % 4;
1708 if (cmd == MOXA_SET_OP_MODE) {
1709 if (get_user(opmode, (int __user *) argp))
1710 return -EFAULT;
1711 if (opmode != RS232_MODE &&
1712 opmode != RS485_2WIRE_MODE &&
1713 opmode != RS422_MODE &&
1714 opmode != RS485_4WIRE_MODE)
1715 return -EFAULT;
1716 lock_kernel();
1717 mask = ModeMask[p];
1718 shiftbit = p * 2;
1719 val = inb(info->opmode_ioaddr);
1720 val &= mask;
1721 val |= (opmode << shiftbit);
1722 outb(val, info->opmode_ioaddr);
1723 unlock_kernel();
1724 } else {
1725 lock_kernel();
1726 shiftbit = p * 2;
1727 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1728 opmode &= OP_MODE_MASK;
1729 unlock_kernel();
1730 if (put_user(opmode, (int __user *)argp))
1731 return -EFAULT;
1732 }
1733 return 0;
1734 }
1735
1736 if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT &&
1737 test_bit(TTY_IO_ERROR, &tty->flags))
1738 return -EIO;
1739
1740 switch (cmd) {
1741 case TIOCGSERIAL:
1742 lock_kernel();
1743 retval = mxser_get_serial_info(tty, argp);
1744 unlock_kernel();
1745 return retval;
1746 case TIOCSSERIAL:
1747 lock_kernel();
1748 retval = mxser_set_serial_info(tty, argp);
1749 unlock_kernel();
1750 return retval;
1751 case TIOCSERGETLSR: /* Get line status register */
1752 return mxser_get_lsr_info(info, argp);
1753 /*
1754 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1755 * - mask passed in arg for lines of interest
1756 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1757 * Caller should use TIOCGICOUNT to see which one it was
1758 */
1759 case TIOCMIWAIT:
1760 spin_lock_irqsave(&info->slock, flags);
1761 cnow = info->icount; /* note the counters on entry */
1762 spin_unlock_irqrestore(&info->slock, flags);
1763
1764 return wait_event_interruptible(info->delta_msr_wait,
1765 mxser_cflags_changed(info, arg, &cnow));
1766 /*
1767 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1768 * Return: write counters to the user passed counter struct
1769 * NB: both 1->0 and 0->1 transitions are counted except for
1770 * RI where only 0->1 is counted.
1771 */
1772 case TIOCGICOUNT: {
1773 struct serial_icounter_struct icnt = { 0 };
1774 spin_lock_irqsave(&info->slock, flags);
1775 cnow = info->icount;
1776 spin_unlock_irqrestore(&info->slock, flags);
1777
1778 icnt.frame = cnow.frame;
1779 icnt.brk = cnow.brk;
1780 icnt.overrun = cnow.overrun;
1781 icnt.buf_overrun = cnow.buf_overrun;
1782 icnt.parity = cnow.parity;
1783 icnt.rx = cnow.rx;
1784 icnt.tx = cnow.tx;
1785 icnt.cts = cnow.cts;
1786 icnt.dsr = cnow.dsr;
1787 icnt.rng = cnow.rng;
1788 icnt.dcd = cnow.dcd;
1789
1790 return copy_to_user(argp, &icnt, sizeof(icnt)) ? -EFAULT : 0;
1791 }
1792 case MOXA_HighSpeedOn:
1793 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1794 case MOXA_SDS_RSTICOUNTER:
1795 lock_kernel();
1796 info->mon_data.rxcnt = 0;
1797 info->mon_data.txcnt = 0;
1798 unlock_kernel();
1799 return 0;
1800
1801 case MOXA_ASPP_OQUEUE:{
1802 int len, lsr;
1803
1804 lock_kernel();
1805 len = mxser_chars_in_buffer(tty);
1806 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
1807 len += (lsr ? 0 : 1);
1808 unlock_kernel();
1809
1810 return put_user(len, (int __user *)argp);
1811 }
1812 case MOXA_ASPP_MON: {
1813 int mcr, status;
1814
1815 lock_kernel();
1816 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1817 mxser_check_modem_status(tty, info, status);
1818
1819 mcr = inb(info->ioaddr + UART_MCR);
1820 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1821 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1822 else
1823 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1824
1825 if (mcr & MOXA_MUST_MCR_TX_XON)
1826 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1827 else
1828 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1829
1830 if (tty->hw_stopped)
1831 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1832 else
1833 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1834 unlock_kernel();
1835 if (copy_to_user(argp, &info->mon_data,
1836 sizeof(struct mxser_mon)))
1837 return -EFAULT;
1838
1839 return 0;
1840 }
1841 case MOXA_ASPP_LSTATUS: {
1842 if (put_user(info->err_shadow, (unsigned char __user *)argp))
1843 return -EFAULT;
1844
1845 info->err_shadow = 0;
1846 return 0;
1847 }
1848 case MOXA_SET_BAUD_METHOD: {
1849 int method;
1850
1851 if (get_user(method, (int __user *)argp))
1852 return -EFAULT;
1853 mxser_set_baud_method[tty->index] = method;
1854 return put_user(method, (int __user *)argp);
1855 }
1856 default:
1857 return -ENOIOCTLCMD;
1858 }
1859 return 0;
1860 }
1861
1862 static void mxser_stoprx(struct tty_struct *tty)
1863 {
1864 struct mxser_port *info = tty->driver_data;
1865
1866 info->ldisc_stop_rx = 1;
1867 if (I_IXOFF(tty)) {
1868 if (info->board->chip_flag) {
1869 info->IER &= ~MOXA_MUST_RECV_ISR;
1870 outb(info->IER, info->ioaddr + UART_IER);
1871 } else {
1872 info->x_char = STOP_CHAR(tty);
1873 outb(0, info->ioaddr + UART_IER);
1874 info->IER |= UART_IER_THRI;
1875 outb(info->IER, info->ioaddr + UART_IER);
1876 }
1877 }
1878
1879 if (tty->termios->c_cflag & CRTSCTS) {
1880 info->MCR &= ~UART_MCR_RTS;
1881 outb(info->MCR, info->ioaddr + UART_MCR);
1882 }
1883 }
1884
1885 /*
1886 * This routine is called by the upper-layer tty layer to signal that
1887 * incoming characters should be throttled.
1888 */
1889 static void mxser_throttle(struct tty_struct *tty)
1890 {
1891 mxser_stoprx(tty);
1892 }
1893
1894 static void mxser_unthrottle(struct tty_struct *tty)
1895 {
1896 struct mxser_port *info = tty->driver_data;
1897
1898 /* startrx */
1899 info->ldisc_stop_rx = 0;
1900 if (I_IXOFF(tty)) {
1901 if (info->x_char)
1902 info->x_char = 0;
1903 else {
1904 if (info->board->chip_flag) {
1905 info->IER |= MOXA_MUST_RECV_ISR;
1906 outb(info->IER, info->ioaddr + UART_IER);
1907 } else {
1908 info->x_char = START_CHAR(tty);
1909 outb(0, info->ioaddr + UART_IER);
1910 info->IER |= UART_IER_THRI;
1911 outb(info->IER, info->ioaddr + UART_IER);
1912 }
1913 }
1914 }
1915
1916 if (tty->termios->c_cflag & CRTSCTS) {
1917 info->MCR |= UART_MCR_RTS;
1918 outb(info->MCR, info->ioaddr + UART_MCR);
1919 }
1920 }
1921
1922 /*
1923 * mxser_stop() and mxser_start()
1924 *
1925 * This routines are called before setting or resetting tty->stopped.
1926 * They enable or disable transmitter interrupts, as necessary.
1927 */
1928 static void mxser_stop(struct tty_struct *tty)
1929 {
1930 struct mxser_port *info = tty->driver_data;
1931 unsigned long flags;
1932
1933 spin_lock_irqsave(&info->slock, flags);
1934 if (info->IER & UART_IER_THRI) {
1935 info->IER &= ~UART_IER_THRI;
1936 outb(info->IER, info->ioaddr + UART_IER);
1937 }
1938 spin_unlock_irqrestore(&info->slock, flags);
1939 }
1940
1941 static void mxser_start(struct tty_struct *tty)
1942 {
1943 struct mxser_port *info = tty->driver_data;
1944 unsigned long flags;
1945
1946 spin_lock_irqsave(&info->slock, flags);
1947 if (info->xmit_cnt && info->port.xmit_buf) {
1948 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1949 info->IER |= UART_IER_THRI;
1950 outb(info->IER, info->ioaddr + UART_IER);
1951 }
1952 spin_unlock_irqrestore(&info->slock, flags);
1953 }
1954
1955 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1956 {
1957 struct mxser_port *info = tty->driver_data;
1958 unsigned long flags;
1959
1960 spin_lock_irqsave(&info->slock, flags);
1961 mxser_change_speed(tty, old_termios);
1962 spin_unlock_irqrestore(&info->slock, flags);
1963
1964 if ((old_termios->c_cflag & CRTSCTS) &&
1965 !(tty->termios->c_cflag & CRTSCTS)) {
1966 tty->hw_stopped = 0;
1967 mxser_start(tty);
1968 }
1969
1970 /* Handle sw stopped */
1971 if ((old_termios->c_iflag & IXON) &&
1972 !(tty->termios->c_iflag & IXON)) {
1973 tty->stopped = 0;
1974
1975 if (info->board->chip_flag) {
1976 spin_lock_irqsave(&info->slock, flags);
1977 mxser_disable_must_rx_software_flow_control(
1978 info->ioaddr);
1979 spin_unlock_irqrestore(&info->slock, flags);
1980 }
1981
1982 mxser_start(tty);
1983 }
1984 }
1985
1986 /*
1987 * mxser_wait_until_sent() --- wait until the transmitter is empty
1988 */
1989 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1990 {
1991 struct mxser_port *info = tty->driver_data;
1992 unsigned long orig_jiffies, char_time;
1993 int lsr;
1994
1995 if (info->type == PORT_UNKNOWN)
1996 return;
1997
1998 if (info->xmit_fifo_size == 0)
1999 return; /* Just in case.... */
2000
2001 orig_jiffies = jiffies;
2002 /*
2003 * Set the check interval to be 1/5 of the estimated time to
2004 * send a single character, and make it at least 1. The check
2005 * interval should also be less than the timeout.
2006 *
2007 * Note: we have to use pretty tight timings here to satisfy
2008 * the NIST-PCTS.
2009 */
2010 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2011 char_time = char_time / 5;
2012 if (char_time == 0)
2013 char_time = 1;
2014 if (timeout && timeout < char_time)
2015 char_time = timeout;
2016 /*
2017 * If the transmitter hasn't cleared in twice the approximate
2018 * amount of time to send the entire FIFO, it probably won't
2019 * ever clear. This assumes the UART isn't doing flow
2020 * control, which is currently the case. Hence, if it ever
2021 * takes longer than info->timeout, this is probably due to a
2022 * UART bug of some kind. So, we clamp the timeout parameter at
2023 * 2*info->timeout.
2024 */
2025 if (!timeout || timeout > 2 * info->timeout)
2026 timeout = 2 * info->timeout;
2027 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2028 printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
2029 timeout, char_time);
2030 printk("jiff=%lu...", jiffies);
2031 #endif
2032 lock_kernel();
2033 while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
2034 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2035 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
2036 #endif
2037 schedule_timeout_interruptible(char_time);
2038 if (signal_pending(current))
2039 break;
2040 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2041 break;
2042 }
2043 set_current_state(TASK_RUNNING);
2044 unlock_kernel();
2045
2046 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2047 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
2048 #endif
2049 }
2050
2051 /*
2052 * This routine is called by tty_hangup() when a hangup is signaled.
2053 */
2054 static void mxser_hangup(struct tty_struct *tty)
2055 {
2056 struct mxser_port *info = tty->driver_data;
2057
2058 mxser_flush_buffer(tty);
2059 mxser_shutdown(tty);
2060 tty_port_hangup(&info->port);
2061 }
2062
2063 /*
2064 * mxser_rs_break() --- routine which turns the break handling on or off
2065 */
2066 static int mxser_rs_break(struct tty_struct *tty, int break_state)
2067 {
2068 struct mxser_port *info = tty->driver_data;
2069 unsigned long flags;
2070
2071 spin_lock_irqsave(&info->slock, flags);
2072 if (break_state == -1)
2073 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2074 info->ioaddr + UART_LCR);
2075 else
2076 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2077 info->ioaddr + UART_LCR);
2078 spin_unlock_irqrestore(&info->slock, flags);
2079 return 0;
2080 }
2081
2082 static void mxser_receive_chars(struct tty_struct *tty,
2083 struct mxser_port *port, int *status)
2084 {
2085 unsigned char ch, gdl;
2086 int ignored = 0;
2087 int cnt = 0;
2088 int recv_room;
2089 int max = 256;
2090
2091 recv_room = tty->receive_room;
2092 if (recv_room == 0 && !port->ldisc_stop_rx)
2093 mxser_stoprx(tty);
2094 if (port->board->chip_flag != MOXA_OTHER_UART) {
2095
2096 if (*status & UART_LSR_SPECIAL)
2097 goto intr_old;
2098 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2099 (*status & MOXA_MUST_LSR_RERR))
2100 goto intr_old;
2101 if (*status & MOXA_MUST_LSR_RERR)
2102 goto intr_old;
2103
2104 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2105
2106 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2107 gdl &= MOXA_MUST_GDL_MASK;
2108 if (gdl >= recv_room) {
2109 if (!port->ldisc_stop_rx)
2110 mxser_stoprx(tty);
2111 }
2112 while (gdl--) {
2113 ch = inb(port->ioaddr + UART_RX);
2114 tty_insert_flip_char(tty, ch, 0);
2115 cnt++;
2116 }
2117 goto end_intr;
2118 }
2119 intr_old:
2120
2121 do {
2122 if (max-- < 0)
2123 break;
2124
2125 ch = inb(port->ioaddr + UART_RX);
2126 if (port->board->chip_flag && (*status & UART_LSR_OE))
2127 outb(0x23, port->ioaddr + UART_FCR);
2128 *status &= port->read_status_mask;
2129 if (*status & port->ignore_status_mask) {
2130 if (++ignored > 100)
2131 break;
2132 } else {
2133 char flag = 0;
2134 if (*status & UART_LSR_SPECIAL) {
2135 if (*status & UART_LSR_BI) {
2136 flag = TTY_BREAK;
2137 port->icount.brk++;
2138
2139 if (port->port.flags & ASYNC_SAK)
2140 do_SAK(tty);
2141 } else if (*status & UART_LSR_PE) {
2142 flag = TTY_PARITY;
2143 port->icount.parity++;
2144 } else if (*status & UART_LSR_FE) {
2145 flag = TTY_FRAME;
2146 port->icount.frame++;
2147 } else if (*status & UART_LSR_OE) {
2148 flag = TTY_OVERRUN;
2149 port->icount.overrun++;
2150 } else
2151 flag = TTY_BREAK;
2152 }
2153 tty_insert_flip_char(tty, ch, flag);
2154 cnt++;
2155 if (cnt >= recv_room) {
2156 if (!port->ldisc_stop_rx)
2157 mxser_stoprx(tty);
2158 break;
2159 }
2160
2161 }
2162
2163 if (port->board->chip_flag)
2164 break;
2165
2166 *status = inb(port->ioaddr + UART_LSR);
2167 } while (*status & UART_LSR_DR);
2168
2169 end_intr:
2170 mxvar_log.rxcnt[tty->index] += cnt;
2171 port->mon_data.rxcnt += cnt;
2172 port->mon_data.up_rxcnt += cnt;
2173
2174 /*
2175 * We are called from an interrupt context with &port->slock
2176 * being held. Drop it temporarily in order to prevent
2177 * recursive locking.
2178 */
2179 spin_unlock(&port->slock);
2180 tty_flip_buffer_push(tty);
2181 spin_lock(&port->slock);
2182 }
2183
2184 static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port)
2185 {
2186 int count, cnt;
2187
2188 if (port->x_char) {
2189 outb(port->x_char, port->ioaddr + UART_TX);
2190 port->x_char = 0;
2191 mxvar_log.txcnt[tty->index]++;
2192 port->mon_data.txcnt++;
2193 port->mon_data.up_txcnt++;
2194 port->icount.tx++;
2195 return;
2196 }
2197
2198 if (port->port.xmit_buf == NULL)
2199 return;
2200
2201 if (port->xmit_cnt <= 0 || tty->stopped ||
2202 (tty->hw_stopped &&
2203 (port->type != PORT_16550A) &&
2204 (!port->board->chip_flag))) {
2205 port->IER &= ~UART_IER_THRI;
2206 outb(port->IER, port->ioaddr + UART_IER);
2207 return;
2208 }
2209
2210 cnt = port->xmit_cnt;
2211 count = port->xmit_fifo_size;
2212 do {
2213 outb(port->port.xmit_buf[port->xmit_tail++],
2214 port->ioaddr + UART_TX);
2215 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2216 if (--port->xmit_cnt <= 0)
2217 break;
2218 } while (--count > 0);
2219 mxvar_log.txcnt[tty->index] += (cnt - port->xmit_cnt);
2220
2221 port->mon_data.txcnt += (cnt - port->xmit_cnt);
2222 port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2223 port->icount.tx += (cnt - port->xmit_cnt);
2224
2225 if (port->xmit_cnt < WAKEUP_CHARS && tty)
2226 tty_wakeup(tty);
2227
2228 if (port->xmit_cnt <= 0) {
2229 port->IER &= ~UART_IER_THRI;
2230 outb(port->IER, port->ioaddr + UART_IER);
2231 }
2232 }
2233
2234 /*
2235 * This is the serial driver's generic interrupt routine
2236 */
2237 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2238 {
2239 int status, iir, i;
2240 struct mxser_board *brd = NULL;
2241 struct mxser_port *port;
2242 int max, irqbits, bits, msr;
2243 unsigned int int_cnt, pass_counter = 0;
2244 int handled = IRQ_NONE;
2245 struct tty_struct *tty;
2246
2247 for (i = 0; i < MXSER_BOARDS; i++)
2248 if (dev_id == &mxser_boards[i]) {
2249 brd = dev_id;
2250 break;
2251 }
2252
2253 if (i == MXSER_BOARDS)
2254 goto irq_stop;
2255 if (brd == NULL)
2256 goto irq_stop;
2257 max = brd->info->nports;
2258 while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
2259 irqbits = inb(brd->vector) & brd->vector_mask;
2260 if (irqbits == brd->vector_mask)
2261 break;
2262
2263 handled = IRQ_HANDLED;
2264 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2265 if (irqbits == brd->vector_mask)
2266 break;
2267 if (bits & irqbits)
2268 continue;
2269 port = &brd->ports[i];
2270
2271 int_cnt = 0;
2272 spin_lock(&port->slock);
2273 do {
2274 iir = inb(port->ioaddr + UART_IIR);
2275 if (iir & UART_IIR_NO_INT)
2276 break;
2277 iir &= MOXA_MUST_IIR_MASK;
2278 tty = tty_port_tty_get(&port->port);
2279 if (!tty ||
2280 (port->port.flags & ASYNC_CLOSING) ||
2281 !(port->port.flags &
2282 ASYNC_INITIALIZED)) {
2283 status = inb(port->ioaddr + UART_LSR);
2284 outb(0x27, port->ioaddr + UART_FCR);
2285 inb(port->ioaddr + UART_MSR);
2286 tty_kref_put(tty);
2287 break;
2288 }
2289
2290 status = inb(port->ioaddr + UART_LSR);
2291
2292 if (status & UART_LSR_PE)
2293 port->err_shadow |= NPPI_NOTIFY_PARITY;
2294 if (status & UART_LSR_FE)
2295 port->err_shadow |= NPPI_NOTIFY_FRAMING;
2296 if (status & UART_LSR_OE)
2297 port->err_shadow |=
2298 NPPI_NOTIFY_HW_OVERRUN;
2299 if (status & UART_LSR_BI)
2300 port->err_shadow |= NPPI_NOTIFY_BREAK;
2301
2302 if (port->board->chip_flag) {
2303 if (iir == MOXA_MUST_IIR_GDA ||
2304 iir == MOXA_MUST_IIR_RDA ||
2305 iir == MOXA_MUST_IIR_RTO ||
2306 iir == MOXA_MUST_IIR_LSR)
2307 mxser_receive_chars(tty, port,
2308 &status);
2309
2310 } else {
2311 status &= port->read_status_mask;
2312 if (status & UART_LSR_DR)
2313 mxser_receive_chars(tty, port,
2314 &status);
2315 }
2316 msr = inb(port->ioaddr + UART_MSR);
2317 if (msr & UART_MSR_ANY_DELTA)
2318 mxser_check_modem_status(tty, port, msr);
2319
2320 if (port->board->chip_flag) {
2321 if (iir == 0x02 && (status &
2322 UART_LSR_THRE))
2323 mxser_transmit_chars(tty, port);
2324 } else {
2325 if (status & UART_LSR_THRE)
2326 mxser_transmit_chars(tty, port);
2327 }
2328 tty_kref_put(tty);
2329 } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2330 spin_unlock(&port->slock);
2331 }
2332 }
2333
2334 irq_stop:
2335 return handled;
2336 }
2337
2338 static const struct tty_operations mxser_ops = {
2339 .open = mxser_open,
2340 .close = mxser_close,
2341 .write = mxser_write,
2342 .put_char = mxser_put_char,
2343 .flush_chars = mxser_flush_chars,
2344 .write_room = mxser_write_room,
2345 .chars_in_buffer = mxser_chars_in_buffer,
2346 .flush_buffer = mxser_flush_buffer,
2347 .ioctl = mxser_ioctl,
2348 .throttle = mxser_throttle,
2349 .unthrottle = mxser_unthrottle,
2350 .set_termios = mxser_set_termios,
2351 .stop = mxser_stop,
2352 .start = mxser_start,
2353 .hangup = mxser_hangup,
2354 .break_ctl = mxser_rs_break,
2355 .wait_until_sent = mxser_wait_until_sent,
2356 .tiocmget = mxser_tiocmget,
2357 .tiocmset = mxser_tiocmset,
2358 };
2359
2360 struct tty_port_operations mxser_port_ops = {
2361 .carrier_raised = mxser_carrier_raised,
2362 .dtr_rts = mxser_dtr_rts,
2363 };
2364
2365 /*
2366 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2367 */
2368
2369 static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev,
2370 unsigned int irq)
2371 {
2372 if (irq)
2373 free_irq(brd->irq, brd);
2374 if (pdev != NULL) { /* PCI */
2375 #ifdef CONFIG_PCI
2376 pci_release_region(pdev, 2);
2377 pci_release_region(pdev, 3);
2378 #endif
2379 } else {
2380 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2381 release_region(brd->vector, 1);
2382 }
2383 }
2384
2385 static int __devinit mxser_initbrd(struct mxser_board *brd,
2386 struct pci_dev *pdev)
2387 {
2388 struct mxser_port *info;
2389 unsigned int i;
2390 int retval;
2391
2392 printk(KERN_INFO "mxser: max. baud rate = %d bps\n",
2393 brd->ports[0].max_baud);
2394
2395 for (i = 0; i < brd->info->nports; i++) {
2396 info = &brd->ports[i];
2397 tty_port_init(&info->port);
2398 info->port.ops = &mxser_port_ops;
2399 info->board = brd;
2400 info->stop_rx = 0;
2401 info->ldisc_stop_rx = 0;
2402
2403 /* Enhance mode enabled here */
2404 if (brd->chip_flag != MOXA_OTHER_UART)
2405 mxser_enable_must_enchance_mode(info->ioaddr);
2406
2407 info->port.flags = ASYNC_SHARE_IRQ;
2408 info->type = brd->uart_type;
2409
2410 process_txrx_fifo(info);
2411
2412 info->custom_divisor = info->baud_base * 16;
2413 info->port.close_delay = 5 * HZ / 10;
2414 info->port.closing_wait = 30 * HZ;
2415 info->normal_termios = mxvar_sdriver->init_termios;
2416 init_waitqueue_head(&info->delta_msr_wait);
2417 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2418 info->err_shadow = 0;
2419 spin_lock_init(&info->slock);
2420
2421 /* before set INT ISR, disable all int */
2422 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2423 info->ioaddr + UART_IER);
2424 }
2425
2426 retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
2427 brd);
2428 if (retval) {
2429 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2430 "conflict with another device.\n",
2431 brd->info->name, brd->irq);
2432 /* We hold resources, we need to release them. */
2433 mxser_release_res(brd, pdev, 0);
2434 }
2435 return retval;
2436 }
2437
2438 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2439 {
2440 int id, i, bits;
2441 unsigned short regs[16], irq;
2442 unsigned char scratch, scratch2;
2443
2444 brd->chip_flag = MOXA_OTHER_UART;
2445
2446 id = mxser_read_register(cap, regs);
2447 switch (id) {
2448 case C168_ASIC_ID:
2449 brd->info = &mxser_cards[0];
2450 break;
2451 case C104_ASIC_ID:
2452 brd->info = &mxser_cards[1];
2453 break;
2454 case CI104J_ASIC_ID:
2455 brd->info = &mxser_cards[2];
2456 break;
2457 case C102_ASIC_ID:
2458 brd->info = &mxser_cards[5];
2459 break;
2460 case CI132_ASIC_ID:
2461 brd->info = &mxser_cards[6];
2462 break;
2463 case CI134_ASIC_ID:
2464 brd->info = &mxser_cards[7];
2465 break;
2466 default:
2467 return 0;
2468 }
2469
2470 irq = 0;
2471 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2472 Flag-hack checks if configuration should be read as 2-port here. */
2473 if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2474 irq = regs[9] & 0xF000;
2475 irq = irq | (irq >> 4);
2476 if (irq != (regs[9] & 0xFF00))
2477 goto err_irqconflict;
2478 } else if (brd->info->nports == 4) {
2479 irq = regs[9] & 0xF000;
2480 irq = irq | (irq >> 4);
2481 irq = irq | (irq >> 8);
2482 if (irq != regs[9])
2483 goto err_irqconflict;
2484 } else if (brd->info->nports == 8) {
2485 irq = regs[9] & 0xF000;
2486 irq = irq | (irq >> 4);
2487 irq = irq | (irq >> 8);
2488 if ((irq != regs[9]) || (irq != regs[10]))
2489 goto err_irqconflict;
2490 }
2491
2492 if (!irq) {
2493 printk(KERN_ERR "mxser: interrupt number unset\n");
2494 return -EIO;
2495 }
2496 brd->irq = ((int)(irq & 0xF000) >> 12);
2497 for (i = 0; i < 8; i++)
2498 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2499 if ((regs[12] & 0x80) == 0) {
2500 printk(KERN_ERR "mxser: invalid interrupt vector\n");
2501 return -EIO;
2502 }
2503 brd->vector = (int)regs[11]; /* interrupt vector */
2504 if (id == 1)
2505 brd->vector_mask = 0x00FF;
2506 else
2507 brd->vector_mask = 0x000F;
2508 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2509 if (regs[12] & bits) {
2510 brd->ports[i].baud_base = 921600;
2511 brd->ports[i].max_baud = 921600;
2512 } else {
2513 brd->ports[i].baud_base = 115200;
2514 brd->ports[i].max_baud = 115200;
2515 }
2516 }
2517 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2518 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2519 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
2520 outb(scratch2, cap + UART_LCR);
2521 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2522 scratch = inb(cap + UART_IIR);
2523
2524 if (scratch & 0xC0)
2525 brd->uart_type = PORT_16550A;
2526 else
2527 brd->uart_type = PORT_16450;
2528 if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2529 "mxser(IO)")) {
2530 printk(KERN_ERR "mxser: can't request ports I/O region: "
2531 "0x%.8lx-0x%.8lx\n",
2532 brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2533 8 * brd->info->nports - 1);
2534 return -EIO;
2535 }
2536 if (!request_region(brd->vector, 1, "mxser(vector)")) {
2537 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2538 printk(KERN_ERR "mxser: can't request interrupt vector region: "
2539 "0x%.8lx-0x%.8lx\n",
2540 brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2541 8 * brd->info->nports - 1);
2542 return -EIO;
2543 }
2544 return brd->info->nports;
2545
2546 err_irqconflict:
2547 printk(KERN_ERR "mxser: invalid interrupt number\n");
2548 return -EIO;
2549 }
2550
2551 static int __devinit mxser_probe(struct pci_dev *pdev,
2552 const struct pci_device_id *ent)
2553 {
2554 #ifdef CONFIG_PCI
2555 struct mxser_board *brd;
2556 unsigned int i, j;
2557 unsigned long ioaddress;
2558 int retval = -EINVAL;
2559
2560 for (i = 0; i < MXSER_BOARDS; i++)
2561 if (mxser_boards[i].info == NULL)
2562 break;
2563
2564 if (i >= MXSER_BOARDS) {
2565 dev_err(&pdev->dev, "too many boards found (maximum %d), board "
2566 "not configured\n", MXSER_BOARDS);
2567 goto err;
2568 }
2569
2570 brd = &mxser_boards[i];
2571 brd->idx = i * MXSER_PORTS_PER_BOARD;
2572 dev_info(&pdev->dev, "found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2573 mxser_cards[ent->driver_data].name,
2574 pdev->bus->number, PCI_SLOT(pdev->devfn));
2575
2576 retval = pci_enable_device(pdev);
2577 if (retval) {
2578 dev_err(&pdev->dev, "PCI enable failed\n");
2579 goto err;
2580 }
2581
2582 /* io address */
2583 ioaddress = pci_resource_start(pdev, 2);
2584 retval = pci_request_region(pdev, 2, "mxser(IO)");
2585 if (retval)
2586 goto err;
2587
2588 brd->info = &mxser_cards[ent->driver_data];
2589 for (i = 0; i < brd->info->nports; i++)
2590 brd->ports[i].ioaddr = ioaddress + 8 * i;
2591
2592 /* vector */
2593 ioaddress = pci_resource_start(pdev, 3);
2594 retval = pci_request_region(pdev, 3, "mxser(vector)");
2595 if (retval)
2596 goto err_relio;
2597 brd->vector = ioaddress;
2598
2599 /* irq */
2600 brd->irq = pdev->irq;
2601
2602 brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2603 brd->uart_type = PORT_16550A;
2604 brd->vector_mask = 0;
2605
2606 for (i = 0; i < brd->info->nports; i++) {
2607 for (j = 0; j < UART_INFO_NUM; j++) {
2608 if (Gpci_uart_info[j].type == brd->chip_flag) {
2609 brd->ports[i].max_baud =
2610 Gpci_uart_info[j].max_baud;
2611
2612 /* exception....CP-102 */
2613 if (brd->info->flags & MXSER_HIGHBAUD)
2614 brd->ports[i].max_baud = 921600;
2615 break;
2616 }
2617 }
2618 }
2619
2620 if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2621 for (i = 0; i < brd->info->nports; i++) {
2622 if (i < 4)
2623 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2624 else
2625 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2626 }
2627 outb(0, ioaddress + 4); /* default set to RS232 mode */
2628 outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
2629 }
2630
2631 for (i = 0; i < brd->info->nports; i++) {
2632 brd->vector_mask |= (1 << i);
2633 brd->ports[i].baud_base = 921600;
2634 }
2635
2636 /* mxser_initbrd will hook ISR. */
2637 retval = mxser_initbrd(brd, pdev);
2638 if (retval)
2639 goto err_null;
2640
2641 for (i = 0; i < brd->info->nports; i++)
2642 tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
2643
2644 pci_set_drvdata(pdev, brd);
2645
2646 return 0;
2647 err_relio:
2648 pci_release_region(pdev, 2);
2649 err_null:
2650 brd->info = NULL;
2651 err:
2652 return retval;
2653 #else
2654 return -ENODEV;
2655 #endif
2656 }
2657
2658 static void __devexit mxser_remove(struct pci_dev *pdev)
2659 {
2660 struct mxser_board *brd = pci_get_drvdata(pdev);
2661 unsigned int i;
2662
2663 for (i = 0; i < brd->info->nports; i++)
2664 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2665
2666 mxser_release_res(brd, pdev, 1);
2667 brd->info = NULL;
2668 }
2669
2670 static struct pci_driver mxser_driver = {
2671 .name = "mxser",
2672 .id_table = mxser_pcibrds,
2673 .probe = mxser_probe,
2674 .remove = __devexit_p(mxser_remove)
2675 };
2676
2677 static int __init mxser_module_init(void)
2678 {
2679 struct mxser_board *brd;
2680 unsigned int b, i, m;
2681 int retval;
2682
2683 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2684 if (!mxvar_sdriver)
2685 return -ENOMEM;
2686
2687 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2688 MXSER_VERSION);
2689
2690 /* Initialize the tty_driver structure */
2691 mxvar_sdriver->owner = THIS_MODULE;
2692 mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
2693 mxvar_sdriver->name = "ttyMI";
2694 mxvar_sdriver->major = ttymajor;
2695 mxvar_sdriver->minor_start = 0;
2696 mxvar_sdriver->num = MXSER_PORTS + 1;
2697 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2698 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2699 mxvar_sdriver->init_termios = tty_std_termios;
2700 mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2701 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2702 tty_set_operations(mxvar_sdriver, &mxser_ops);
2703
2704 retval = tty_register_driver(mxvar_sdriver);
2705 if (retval) {
2706 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2707 "tty driver !\n");
2708 goto err_put;
2709 }
2710
2711 /* Start finding ISA boards here */
2712 for (m = 0, b = 0; b < MXSER_BOARDS; b++) {
2713 if (!ioaddr[b])
2714 continue;
2715
2716 brd = &mxser_boards[m];
2717 retval = mxser_get_ISA_conf(ioaddr[b], brd);
2718 if (retval <= 0) {
2719 brd->info = NULL;
2720 continue;
2721 }
2722
2723 printk(KERN_INFO "mxser: found MOXA %s board (CAP=0x%lx)\n",
2724 brd->info->name, ioaddr[b]);
2725
2726 /* mxser_initbrd will hook ISR. */
2727 if (mxser_initbrd(brd, NULL) < 0) {
2728 brd->info = NULL;
2729 continue;
2730 }
2731
2732 brd->idx = m * MXSER_PORTS_PER_BOARD;
2733 for (i = 0; i < brd->info->nports; i++)
2734 tty_register_device(mxvar_sdriver, brd->idx + i, NULL);
2735
2736 m++;
2737 }
2738
2739 retval = pci_register_driver(&mxser_driver);
2740 if (retval) {
2741 printk(KERN_ERR "mxser: can't register pci driver\n");
2742 if (!m) {
2743 retval = -ENODEV;
2744 goto err_unr;
2745 } /* else: we have some ISA cards under control */
2746 }
2747
2748 return 0;
2749 err_unr:
2750 tty_unregister_driver(mxvar_sdriver);
2751 err_put:
2752 put_tty_driver(mxvar_sdriver);
2753 return retval;
2754 }
2755
2756 static void __exit mxser_module_exit(void)
2757 {
2758 unsigned int i, j;
2759
2760 pci_unregister_driver(&mxser_driver);
2761
2762 for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2763 if (mxser_boards[i].info != NULL)
2764 for (j = 0; j < mxser_boards[i].info->nports; j++)
2765 tty_unregister_device(mxvar_sdriver,
2766 mxser_boards[i].idx + j);
2767 tty_unregister_driver(mxvar_sdriver);
2768 put_tty_driver(mxvar_sdriver);
2769
2770 for (i = 0; i < MXSER_BOARDS; i++)
2771 if (mxser_boards[i].info != NULL)
2772 mxser_release_res(&mxser_boards[i], NULL, 1);
2773 }
2774
2775 module_init(mxser_module_init);
2776 module_exit(mxser_module_exit);
Support for the Chinese Samsung S3C2440 based development boards