?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
tty_port: Add a port level carrier detect operation
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / drivers / char / mxser.c
blobeafbbcf355e7d21b2016ac1452fd73d30afd122b
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/gfp.h>
37 #include <linux/ioport.h>
38 #include <linux/mm.h>
39 #include <linux/delay.h>
40 #include <linux/pci.h>
41 #include <linux/bitops.h>
42
43 #include <asm/system.h>
44 #include <asm/io.h>
45 #include <asm/irq.h>
46 #include <asm/uaccess.h>
47
48 #include "mxser.h"
49
50 #define MXSER_VERSION "2.0.4" /* 1.12 */
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_CB114 0x1142
72 #define PCI_DEVICE_ID_CP114UL 0x1143
73 #define PCI_DEVICE_ID_CB134I 0x1341
74 #define PCI_DEVICE_ID_CP138U 0x1380
75
76
77 #define C168_ASIC_ID 1
78 #define C104_ASIC_ID 2
79 #define C102_ASIC_ID 0xB
80 #define CI132_ASIC_ID 4
81 #define CI134_ASIC_ID 3
82 #define CI104J_ASIC_ID 5
83
84 #define MXSER_HIGHBAUD 1
85 #define MXSER_HAS2 2
86
87 /* This is only for PCI */
88 static const struct {
89 int type;
90 int tx_fifo;
91 int rx_fifo;
92 int xmit_fifo_size;
93 int rx_high_water;
94 int rx_trigger;
95 int rx_low_water;
96 long max_baud;
97 } Gpci_uart_info[] = {
98 {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
99 {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
100 {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
101 };
102 #define UART_INFO_NUM ARRAY_SIZE(Gpci_uart_info)
103
104 struct mxser_cardinfo {
105 char *name;
106 unsigned int nports;
107 unsigned int flags;
108 };
109
110 static const struct mxser_cardinfo mxser_cards[] = {
111 /* 0*/ { "C168 series", 8, },
112 { "C104 series", 4, },
113 { "CI-104J series", 4, },
114 { "C168H/PCI series", 8, },
115 { "C104H/PCI series", 4, },
116 /* 5*/ { "C102 series", 4, MXSER_HAS2 }, /* C102-ISA */
117 { "CI-132 series", 4, MXSER_HAS2 },
118 { "CI-134 series", 4, },
119 { "CP-132 series", 2, },
120 { "CP-114 series", 4, },
121 /*10*/ { "CT-114 series", 4, },
122 { "CP-102 series", 2, MXSER_HIGHBAUD },
123 { "CP-104U series", 4, },
124 { "CP-168U series", 8, },
125 { "CP-132U series", 2, },
126 /*15*/ { "CP-134U series", 4, },
127 { "CP-104JU series", 4, },
128 { "Moxa UC7000 Serial", 8, }, /* RC7000 */
129 { "CP-118U series", 8, },
130 { "CP-102UL series", 2, },
131 /*20*/ { "CP-102U series", 2, },
132 { "CP-118EL series", 8, },
133 { "CP-168EL series", 8, },
134 { "CP-104EL series", 4, },
135 { "CB-108 series", 8, },
136 /*25*/ { "CB-114 series", 4, },
137 { "CB-134I series", 4, },
138 { "CP-138U series", 8, },
139 { "POS-104UL series", 4, },
140 { "CP-114UL series", 4, },
141 /*30*/ { "CP-102UF series", 2, }
142 };
143
144 /* driver_data correspond to the lines in the structure above
145 see also ISA probe function before you change something */
146 static struct pci_device_id mxser_pcibrds[] = {
147 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C168), .driver_data = 3 },
148 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_C104), .driver_data = 4 },
149 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132), .driver_data = 8 },
150 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP114), .driver_data = 9 },
151 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CT114), .driver_data = 10 },
152 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102), .driver_data = 11 },
153 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104U), .driver_data = 12 },
154 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168U), .driver_data = 13 },
155 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP132U), .driver_data = 14 },
156 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP134U), .driver_data = 15 },
157 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104JU),.driver_data = 16 },
158 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_RC7000), .driver_data = 17 },
159 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118U), .driver_data = 18 },
160 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102UL),.driver_data = 19 },
161 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP102U), .driver_data = 20 },
162 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP118EL),.driver_data = 21 },
163 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP168EL),.driver_data = 22 },
164 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_MOXA_CP104EL),.driver_data = 23 },
165 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB108), .driver_data = 24 },
166 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB114), .driver_data = 25 },
167 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CB134I), .driver_data = 26 },
168 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP138U), .driver_data = 27 },
169 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_POS104UL), .driver_data = 28 },
170 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP114UL), .driver_data = 29 },
171 { PCI_VDEVICE(MOXA, PCI_DEVICE_ID_CP102UF), .driver_data = 30 },
172 { }
173 };
174 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
175
176 static unsigned long ioaddr[MXSER_BOARDS];
177 static int ttymajor = MXSERMAJOR;
178
179 /* Variables for insmod */
180
181 MODULE_AUTHOR("Casper Yang");
182 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
183 module_param_array(ioaddr, ulong, NULL, 0);
184 MODULE_PARM_DESC(ioaddr, "ISA io addresses to look for a moxa board");
185 module_param(ttymajor, int, 0);
186 MODULE_LICENSE("GPL");
187
188 struct mxser_log {
189 int tick;
190 unsigned long rxcnt[MXSER_PORTS];
191 unsigned long txcnt[MXSER_PORTS];
192 };
193
194 struct mxser_mon {
195 unsigned long rxcnt;
196 unsigned long txcnt;
197 unsigned long up_rxcnt;
198 unsigned long up_txcnt;
199 int modem_status;
200 unsigned char hold_reason;
201 };
202
203 struct mxser_mon_ext {
204 unsigned long rx_cnt[32];
205 unsigned long tx_cnt[32];
206 unsigned long up_rxcnt[32];
207 unsigned long up_txcnt[32];
208 int modem_status[32];
209
210 long baudrate[32];
211 int databits[32];
212 int stopbits[32];
213 int parity[32];
214 int flowctrl[32];
215 int fifo[32];
216 int iftype[32];
217 };
218
219 struct mxser_board;
220
221 struct mxser_port {
222 struct tty_port port;
223 struct mxser_board *board;
224
225 unsigned long ioaddr;
226 unsigned long opmode_ioaddr;
227 int max_baud;
228
229 int rx_high_water;
230 int rx_trigger; /* Rx fifo trigger level */
231 int rx_low_water;
232 int baud_base; /* max. speed */
233 int type; /* UART type */
234
235 int x_char; /* xon/xoff character */
236 int IER; /* Interrupt Enable Register */
237 int MCR; /* Modem control register */
238
239 unsigned char stop_rx;
240 unsigned char ldisc_stop_rx;
241
242 int custom_divisor;
243 unsigned char err_shadow;
244
245 struct async_icount icount; /* kernel counters for 4 input interrupts */
246 int timeout;
247
248 int read_status_mask;
249 int ignore_status_mask;
250 int xmit_fifo_size;
251 int xmit_head;
252 int xmit_tail;
253 int xmit_cnt;
254
255 struct ktermios normal_termios;
256
257 struct mxser_mon mon_data;
258
259 spinlock_t slock;
260 wait_queue_head_t delta_msr_wait;
261 };
262
263 struct mxser_board {
264 unsigned int idx;
265 int irq;
266 const struct mxser_cardinfo *info;
267 unsigned long vector;
268 unsigned long vector_mask;
269
270 int chip_flag;
271 int uart_type;
272
273 struct mxser_port ports[MXSER_PORTS_PER_BOARD];
274 };
275
276 struct mxser_mstatus {
277 tcflag_t cflag;
278 int cts;
279 int dsr;
280 int ri;
281 int dcd;
282 };
283
284 static struct mxser_board mxser_boards[MXSER_BOARDS];
285 static struct tty_driver *mxvar_sdriver;
286 static struct mxser_log mxvar_log;
287 static int mxser_set_baud_method[MXSER_PORTS + 1];
288
289 static void mxser_enable_must_enchance_mode(unsigned long baseio)
290 {
291 u8 oldlcr;
292 u8 efr;
293
294 oldlcr = inb(baseio + UART_LCR);
295 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
296
297 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
298 efr |= MOXA_MUST_EFR_EFRB_ENABLE;
299
300 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
301 outb(oldlcr, baseio + UART_LCR);
302 }
303
304 static void mxser_disable_must_enchance_mode(unsigned long baseio)
305 {
306 u8 oldlcr;
307 u8 efr;
308
309 oldlcr = inb(baseio + UART_LCR);
310 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
311
312 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
313 efr &= ~MOXA_MUST_EFR_EFRB_ENABLE;
314
315 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
316 outb(oldlcr, baseio + UART_LCR);
317 }
318
319 static void mxser_set_must_xon1_value(unsigned long baseio, u8 value)
320 {
321 u8 oldlcr;
322 u8 efr;
323
324 oldlcr = inb(baseio + UART_LCR);
325 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
326
327 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
328 efr &= ~MOXA_MUST_EFR_BANK_MASK;
329 efr |= MOXA_MUST_EFR_BANK0;
330
331 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
332 outb(value, baseio + MOXA_MUST_XON1_REGISTER);
333 outb(oldlcr, baseio + UART_LCR);
334 }
335
336 static void mxser_set_must_xoff1_value(unsigned long baseio, u8 value)
337 {
338 u8 oldlcr;
339 u8 efr;
340
341 oldlcr = inb(baseio + UART_LCR);
342 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
343
344 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
345 efr &= ~MOXA_MUST_EFR_BANK_MASK;
346 efr |= MOXA_MUST_EFR_BANK0;
347
348 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
349 outb(value, baseio + MOXA_MUST_XOFF1_REGISTER);
350 outb(oldlcr, baseio + UART_LCR);
351 }
352
353 static void mxser_set_must_fifo_value(struct mxser_port *info)
354 {
355 u8 oldlcr;
356 u8 efr;
357
358 oldlcr = inb(info->ioaddr + UART_LCR);
359 outb(MOXA_MUST_ENTER_ENCHANCE, info->ioaddr + UART_LCR);
360
361 efr = inb(info->ioaddr + MOXA_MUST_EFR_REGISTER);
362 efr &= ~MOXA_MUST_EFR_BANK_MASK;
363 efr |= MOXA_MUST_EFR_BANK1;
364
365 outb(efr, info->ioaddr + MOXA_MUST_EFR_REGISTER);
366 outb((u8)info->rx_high_water, info->ioaddr + MOXA_MUST_RBRTH_REGISTER);
367 outb((u8)info->rx_trigger, info->ioaddr + MOXA_MUST_RBRTI_REGISTER);
368 outb((u8)info->rx_low_water, info->ioaddr + MOXA_MUST_RBRTL_REGISTER);
369 outb(oldlcr, info->ioaddr + UART_LCR);
370 }
371
372 static void mxser_set_must_enum_value(unsigned long baseio, u8 value)
373 {
374 u8 oldlcr;
375 u8 efr;
376
377 oldlcr = inb(baseio + UART_LCR);
378 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
379
380 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
381 efr &= ~MOXA_MUST_EFR_BANK_MASK;
382 efr |= MOXA_MUST_EFR_BANK2;
383
384 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
385 outb(value, baseio + MOXA_MUST_ENUM_REGISTER);
386 outb(oldlcr, baseio + UART_LCR);
387 }
388
389 static void mxser_get_must_hardware_id(unsigned long baseio, u8 *pId)
390 {
391 u8 oldlcr;
392 u8 efr;
393
394 oldlcr = inb(baseio + UART_LCR);
395 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
396
397 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
398 efr &= ~MOXA_MUST_EFR_BANK_MASK;
399 efr |= MOXA_MUST_EFR_BANK2;
400
401 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
402 *pId = inb(baseio + MOXA_MUST_HWID_REGISTER);
403 outb(oldlcr, baseio + UART_LCR);
404 }
405
406 static void SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(unsigned long baseio)
407 {
408 u8 oldlcr;
409 u8 efr;
410
411 oldlcr = inb(baseio + UART_LCR);
412 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
413
414 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
415 efr &= ~MOXA_MUST_EFR_SF_MASK;
416
417 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
418 outb(oldlcr, baseio + UART_LCR);
419 }
420
421 static void mxser_enable_must_tx_software_flow_control(unsigned long baseio)
422 {
423 u8 oldlcr;
424 u8 efr;
425
426 oldlcr = inb(baseio + UART_LCR);
427 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
428
429 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
430 efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
431 efr |= MOXA_MUST_EFR_SF_TX1;
432
433 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
434 outb(oldlcr, baseio + UART_LCR);
435 }
436
437 static void mxser_disable_must_tx_software_flow_control(unsigned long baseio)
438 {
439 u8 oldlcr;
440 u8 efr;
441
442 oldlcr = inb(baseio + UART_LCR);
443 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
444
445 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
446 efr &= ~MOXA_MUST_EFR_SF_TX_MASK;
447
448 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
449 outb(oldlcr, baseio + UART_LCR);
450 }
451
452 static void mxser_enable_must_rx_software_flow_control(unsigned long baseio)
453 {
454 u8 oldlcr;
455 u8 efr;
456
457 oldlcr = inb(baseio + UART_LCR);
458 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
459
460 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
461 efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
462 efr |= MOXA_MUST_EFR_SF_RX1;
463
464 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
465 outb(oldlcr, baseio + UART_LCR);
466 }
467
468 static void mxser_disable_must_rx_software_flow_control(unsigned long baseio)
469 {
470 u8 oldlcr;
471 u8 efr;
472
473 oldlcr = inb(baseio + UART_LCR);
474 outb(MOXA_MUST_ENTER_ENCHANCE, baseio + UART_LCR);
475
476 efr = inb(baseio + MOXA_MUST_EFR_REGISTER);
477 efr &= ~MOXA_MUST_EFR_SF_RX_MASK;
478
479 outb(efr, baseio + MOXA_MUST_EFR_REGISTER);
480 outb(oldlcr, baseio + UART_LCR);
481 }
482
483 #ifdef CONFIG_PCI
484 static int __devinit CheckIsMoxaMust(unsigned long io)
485 {
486 u8 oldmcr, hwid;
487 int i;
488
489 outb(0, io + UART_LCR);
490 mxser_disable_must_enchance_mode(io);
491 oldmcr = inb(io + UART_MCR);
492 outb(0, io + UART_MCR);
493 mxser_set_must_xon1_value(io, 0x11);
494 if ((hwid = inb(io + UART_MCR)) != 0) {
495 outb(oldmcr, io + UART_MCR);
496 return MOXA_OTHER_UART;
497 }
498
499 mxser_get_must_hardware_id(io, &hwid);
500 for (i = 1; i < UART_INFO_NUM; i++) { /* 0 = OTHER_UART */
501 if (hwid == Gpci_uart_info[i].type)
502 return (int)hwid;
503 }
504 return MOXA_OTHER_UART;
505 }
506 #endif
507
508 static void process_txrx_fifo(struct mxser_port *info)
509 {
510 int i;
511
512 if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
513 info->rx_trigger = 1;
514 info->rx_high_water = 1;
515 info->rx_low_water = 1;
516 info->xmit_fifo_size = 1;
517 } else
518 for (i = 0; i < UART_INFO_NUM; i++)
519 if (info->board->chip_flag == Gpci_uart_info[i].type) {
520 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
521 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
522 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
523 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
524 break;
525 }
526 }
527
528 static unsigned char mxser_get_msr(int baseaddr, int mode, int port)
529 {
530 static unsigned char mxser_msr[MXSER_PORTS + 1];
531 unsigned char status = 0;
532
533 status = inb(baseaddr + UART_MSR);
534
535 mxser_msr[port] &= 0x0F;
536 mxser_msr[port] |= status;
537 status = mxser_msr[port];
538 if (mode)
539 mxser_msr[port] = 0;
540
541 return status;
542 }
543
544 static int mxser_carrier_raised(struct tty_port *port)
545 {
546 struct mxser_port *mp = container_of(port, struct mxser_port, port);
547 return (inb(mp->ioaddr + UART_MSR) & UART_MSR_DCD)?1:0;
548 }
549
550 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp,
551 struct mxser_port *mp)
552 {
553 DECLARE_WAITQUEUE(wait, current);
554 int retval;
555 int do_clocal = 0;
556 unsigned long flags;
557 int cd;
558 struct tty_port *port = &mp->port;
559
560 /*
561 * If non-blocking mode is set, or the port is not enabled,
562 * then make the check up front and then exit.
563 */
564 if ((filp->f_flags & O_NONBLOCK) ||
565 test_bit(TTY_IO_ERROR, &tty->flags)) {
566 port->flags |= ASYNC_NORMAL_ACTIVE;
567 return 0;
568 }
569
570 if (tty->termios->c_cflag & CLOCAL)
571 do_clocal = 1;
572
573 /*
574 * Block waiting for the carrier detect and the line to become
575 * free (i.e., not in use by the callout). While we are in
576 * this loop, port->count is dropped by one, so that
577 * mxser_close() knows when to free things. We restore it upon
578 * exit, either normal or abnormal.
579 */
580 retval = 0;
581 add_wait_queue(&port->open_wait, &wait);
582
583 spin_lock_irqsave(&mp->slock, flags);
584 if (!tty_hung_up_p(filp))
585 port->count--;
586 spin_unlock_irqrestore(&mp->slock, flags);
587 port->blocked_open++;
588 while (1) {
589 spin_lock_irqsave(&mp->slock, flags);
590 outb(inb(mp->ioaddr + UART_MCR) |
591 UART_MCR_DTR | UART_MCR_RTS, mp->ioaddr + UART_MCR);
592 spin_unlock_irqrestore(&mp->slock, flags);
593 set_current_state(TASK_INTERRUPTIBLE);
594 if (tty_hung_up_p(filp) || !(port->flags & ASYNC_INITIALIZED)) {
595 if (port->flags & ASYNC_HUP_NOTIFY)
596 retval = -EAGAIN;
597 else
598 retval = -ERESTARTSYS;
599 break;
600 }
601 cd = tty_port_carrier_raised(port);
602 if (!(port->flags & ASYNC_CLOSING) && (do_clocal || cd))
603 break;
604 if (signal_pending(current)) {
605 retval = -ERESTARTSYS;
606 break;
607 }
608 schedule();
609 }
610 set_current_state(TASK_RUNNING);
611 remove_wait_queue(&port->open_wait, &wait);
612 if (!tty_hung_up_p(filp))
613 port->count++;
614 port->blocked_open--;
615 if (retval)
616 return retval;
617 port->flags |= ASYNC_NORMAL_ACTIVE;
618 return 0;
619 }
620
621 static int mxser_set_baud(struct tty_struct *tty, long newspd)
622 {
623 struct mxser_port *info = tty->driver_data;
624 int quot = 0, baud;
625 unsigned char cval;
626
627 if (!info->ioaddr)
628 return -1;
629
630 if (newspd > info->max_baud)
631 return -1;
632
633 if (newspd == 134) {
634 quot = 2 * info->baud_base / 269;
635 tty_encode_baud_rate(tty, 134, 134);
636 } else if (newspd) {
637 quot = info->baud_base / newspd;
638 if (quot == 0)
639 quot = 1;
640 baud = info->baud_base/quot;
641 tty_encode_baud_rate(tty, baud, baud);
642 } else {
643 quot = 0;
644 }
645
646 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
647 info->timeout += HZ / 50; /* Add .02 seconds of slop */
648
649 if (quot) {
650 info->MCR |= UART_MCR_DTR;
651 outb(info->MCR, info->ioaddr + UART_MCR);
652 } else {
653 info->MCR &= ~UART_MCR_DTR;
654 outb(info->MCR, info->ioaddr + UART_MCR);
655 return 0;
656 }
657
658 cval = inb(info->ioaddr + UART_LCR);
659
660 outb(cval | UART_LCR_DLAB, info->ioaddr + UART_LCR); /* set DLAB */
661
662 outb(quot & 0xff, info->ioaddr + UART_DLL); /* LS of divisor */
663 outb(quot >> 8, info->ioaddr + UART_DLM); /* MS of divisor */
664 outb(cval, info->ioaddr + UART_LCR); /* reset DLAB */
665
666 #ifdef BOTHER
667 if (C_BAUD(tty) == BOTHER) {
668 quot = info->baud_base % newspd;
669 quot *= 8;
670 if (quot % newspd > newspd / 2) {
671 quot /= newspd;
672 quot++;
673 } else
674 quot /= newspd;
675
676 mxser_set_must_enum_value(info->ioaddr, quot);
677 } else
678 #endif
679 mxser_set_must_enum_value(info->ioaddr, 0);
680
681 return 0;
682 }
683
684 /*
685 * This routine is called to set the UART divisor registers to match
686 * the specified baud rate for a serial port.
687 */
688 static int mxser_change_speed(struct tty_struct *tty,
689 struct ktermios *old_termios)
690 {
691 struct mxser_port *info = tty->driver_data;
692 unsigned cflag, cval, fcr;
693 int ret = 0;
694 unsigned char status;
695
696 cflag = tty->termios->c_cflag;
697 if (!info->ioaddr)
698 return ret;
699
700 if (mxser_set_baud_method[tty->index] == 0)
701 mxser_set_baud(tty, tty_get_baud_rate(tty));
702
703 /* byte size and parity */
704 switch (cflag & CSIZE) {
705 case CS5:
706 cval = 0x00;
707 break;
708 case CS6:
709 cval = 0x01;
710 break;
711 case CS7:
712 cval = 0x02;
713 break;
714 case CS8:
715 cval = 0x03;
716 break;
717 default:
718 cval = 0x00;
719 break; /* too keep GCC shut... */
720 }
721 if (cflag & CSTOPB)
722 cval |= 0x04;
723 if (cflag & PARENB)
724 cval |= UART_LCR_PARITY;
725 if (!(cflag & PARODD))
726 cval |= UART_LCR_EPAR;
727 if (cflag & CMSPAR)
728 cval |= UART_LCR_SPAR;
729
730 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
731 if (info->board->chip_flag) {
732 fcr = UART_FCR_ENABLE_FIFO;
733 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
734 mxser_set_must_fifo_value(info);
735 } else
736 fcr = 0;
737 } else {
738 fcr = UART_FCR_ENABLE_FIFO;
739 if (info->board->chip_flag) {
740 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
741 mxser_set_must_fifo_value(info);
742 } else {
743 switch (info->rx_trigger) {
744 case 1:
745 fcr |= UART_FCR_TRIGGER_1;
746 break;
747 case 4:
748 fcr |= UART_FCR_TRIGGER_4;
749 break;
750 case 8:
751 fcr |= UART_FCR_TRIGGER_8;
752 break;
753 default:
754 fcr |= UART_FCR_TRIGGER_14;
755 break;
756 }
757 }
758 }
759
760 /* CTS flow control flag and modem status interrupts */
761 info->IER &= ~UART_IER_MSI;
762 info->MCR &= ~UART_MCR_AFE;
763 if (cflag & CRTSCTS) {
764 info->port.flags |= ASYNC_CTS_FLOW;
765 info->IER |= UART_IER_MSI;
766 if ((info->type == PORT_16550A) || (info->board->chip_flag)) {
767 info->MCR |= UART_MCR_AFE;
768 } else {
769 status = inb(info->ioaddr + UART_MSR);
770 if (tty->hw_stopped) {
771 if (status & UART_MSR_CTS) {
772 tty->hw_stopped = 0;
773 if (info->type != PORT_16550A &&
774 !info->board->chip_flag) {
775 outb(info->IER & ~UART_IER_THRI,
776 info->ioaddr +
777 UART_IER);
778 info->IER |= UART_IER_THRI;
779 outb(info->IER, info->ioaddr +
780 UART_IER);
781 }
782 tty_wakeup(tty);
783 }
784 } else {
785 if (!(status & UART_MSR_CTS)) {
786 tty->hw_stopped = 1;
787 if ((info->type != PORT_16550A) &&
788 (!info->board->chip_flag)) {
789 info->IER &= ~UART_IER_THRI;
790 outb(info->IER, info->ioaddr +
791 UART_IER);
792 }
793 }
794 }
795 }
796 } else {
797 info->port.flags &= ~ASYNC_CTS_FLOW;
798 }
799 outb(info->MCR, info->ioaddr + UART_MCR);
800 if (cflag & CLOCAL) {
801 info->port.flags &= ~ASYNC_CHECK_CD;
802 } else {
803 info->port.flags |= ASYNC_CHECK_CD;
804 info->IER |= UART_IER_MSI;
805 }
806 outb(info->IER, info->ioaddr + UART_IER);
807
808 /*
809 * Set up parity check flag
810 */
811 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
812 if (I_INPCK(tty))
813 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
814 if (I_BRKINT(tty) || I_PARMRK(tty))
815 info->read_status_mask |= UART_LSR_BI;
816
817 info->ignore_status_mask = 0;
818
819 if (I_IGNBRK(tty)) {
820 info->ignore_status_mask |= UART_LSR_BI;
821 info->read_status_mask |= UART_LSR_BI;
822 /*
823 * If we're ignore parity and break indicators, ignore
824 * overruns too. (For real raw support).
825 */
826 if (I_IGNPAR(tty)) {
827 info->ignore_status_mask |=
828 UART_LSR_OE |
829 UART_LSR_PE |
830 UART_LSR_FE;
831 info->read_status_mask |=
832 UART_LSR_OE |
833 UART_LSR_PE |
834 UART_LSR_FE;
835 }
836 }
837 if (info->board->chip_flag) {
838 mxser_set_must_xon1_value(info->ioaddr, START_CHAR(tty));
839 mxser_set_must_xoff1_value(info->ioaddr, STOP_CHAR(tty));
840 if (I_IXON(tty)) {
841 mxser_enable_must_rx_software_flow_control(
842 info->ioaddr);
843 } else {
844 mxser_disable_must_rx_software_flow_control(
845 info->ioaddr);
846 }
847 if (I_IXOFF(tty)) {
848 mxser_enable_must_tx_software_flow_control(
849 info->ioaddr);
850 } else {
851 mxser_disable_must_tx_software_flow_control(
852 info->ioaddr);
853 }
854 }
855
856
857 outb(fcr, info->ioaddr + UART_FCR); /* set fcr */
858 outb(cval, info->ioaddr + UART_LCR);
859
860 return ret;
861 }
862
863 static void mxser_check_modem_status(struct tty_struct *tty,
864 struct mxser_port *port, int status)
865 {
866 /* update input line counters */
867 if (status & UART_MSR_TERI)
868 port->icount.rng++;
869 if (status & UART_MSR_DDSR)
870 port->icount.dsr++;
871 if (status & UART_MSR_DDCD)
872 port->icount.dcd++;
873 if (status & UART_MSR_DCTS)
874 port->icount.cts++;
875 port->mon_data.modem_status = status;
876 wake_up_interruptible(&port->delta_msr_wait);
877
878 if ((port->port.flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
879 if (status & UART_MSR_DCD)
880 wake_up_interruptible(&port->port.open_wait);
881 }
882
883 tty = tty_port_tty_get(&port->port);
884 if (port->port.flags & ASYNC_CTS_FLOW) {
885 if (tty->hw_stopped) {
886 if (status & UART_MSR_CTS) {
887 tty->hw_stopped = 0;
888
889 if ((port->type != PORT_16550A) &&
890 (!port->board->chip_flag)) {
891 outb(port->IER & ~UART_IER_THRI,
892 port->ioaddr + UART_IER);
893 port->IER |= UART_IER_THRI;
894 outb(port->IER, port->ioaddr +
895 UART_IER);
896 }
897 tty_wakeup(tty);
898 }
899 } else {
900 if (!(status & UART_MSR_CTS)) {
901 tty->hw_stopped = 1;
902 if (port->type != PORT_16550A &&
903 !port->board->chip_flag) {
904 port->IER &= ~UART_IER_THRI;
905 outb(port->IER, port->ioaddr +
906 UART_IER);
907 }
908 }
909 }
910 }
911 }
912
913 static int mxser_startup(struct tty_struct *tty)
914 {
915 struct mxser_port *info = tty->driver_data;
916 unsigned long page;
917 unsigned long flags;
918
919 page = __get_free_page(GFP_KERNEL);
920 if (!page)
921 return -ENOMEM;
922
923 spin_lock_irqsave(&info->slock, flags);
924
925 if (info->port.flags & ASYNC_INITIALIZED) {
926 free_page(page);
927 spin_unlock_irqrestore(&info->slock, flags);
928 return 0;
929 }
930
931 if (!info->ioaddr || !info->type) {
932 set_bit(TTY_IO_ERROR, &tty->flags);
933 free_page(page);
934 spin_unlock_irqrestore(&info->slock, flags);
935 return 0;
936 }
937 if (info->port.xmit_buf)
938 free_page(page);
939 else
940 info->port.xmit_buf = (unsigned char *) page;
941
942 /*
943 * Clear the FIFO buffers and disable them
944 * (they will be reenabled in mxser_change_speed())
945 */
946 if (info->board->chip_flag)
947 outb((UART_FCR_CLEAR_RCVR |
948 UART_FCR_CLEAR_XMIT |
949 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->ioaddr + UART_FCR);
950 else
951 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
952 info->ioaddr + UART_FCR);
953
954 /*
955 * At this point there's no way the LSR could still be 0xFF;
956 * if it is, then bail out, because there's likely no UART
957 * here.
958 */
959 if (inb(info->ioaddr + UART_LSR) == 0xff) {
960 spin_unlock_irqrestore(&info->slock, flags);
961 if (capable(CAP_SYS_ADMIN)) {
962 if (tty)
963 set_bit(TTY_IO_ERROR, &tty->flags);
964 return 0;
965 } else
966 return -ENODEV;
967 }
968
969 /*
970 * Clear the interrupt registers.
971 */
972 (void) inb(info->ioaddr + UART_LSR);
973 (void) inb(info->ioaddr + UART_RX);
974 (void) inb(info->ioaddr + UART_IIR);
975 (void) inb(info->ioaddr + UART_MSR);
976
977 /*
978 * Now, initialize the UART
979 */
980 outb(UART_LCR_WLEN8, info->ioaddr + UART_LCR); /* reset DLAB */
981 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
982 outb(info->MCR, info->ioaddr + UART_MCR);
983
984 /*
985 * Finally, enable interrupts
986 */
987 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
988
989 if (info->board->chip_flag)
990 info->IER |= MOXA_MUST_IER_EGDAI;
991 outb(info->IER, info->ioaddr + UART_IER); /* enable interrupts */
992
993 /*
994 * And clear the interrupt registers again for luck.
995 */
996 (void) inb(info->ioaddr + UART_LSR);
997 (void) inb(info->ioaddr + UART_RX);
998 (void) inb(info->ioaddr + UART_IIR);
999 (void) inb(info->ioaddr + UART_MSR);
1000
1001 clear_bit(TTY_IO_ERROR, &tty->flags);
1002 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1003
1004 /*
1005 * and set the speed of the serial port
1006 */
1007 mxser_change_speed(tty, NULL);
1008 info->port.flags |= ASYNC_INITIALIZED;
1009 spin_unlock_irqrestore(&info->slock, flags);
1010
1011 return 0;
1012 }
1013
1014 /*
1015 * This routine will shutdown a serial port; interrupts maybe disabled, and
1016 * DTR is dropped if the hangup on close termio flag is on.
1017 */
1018 static void mxser_shutdown(struct tty_struct *tty)
1019 {
1020 struct mxser_port *info = tty->driver_data;
1021 unsigned long flags;
1022
1023 if (!(info->port.flags & ASYNC_INITIALIZED))
1024 return;
1025
1026 spin_lock_irqsave(&info->slock, flags);
1027
1028 /*
1029 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
1030 * here so the queue might never be waken up
1031 */
1032 wake_up_interruptible(&info->delta_msr_wait);
1033
1034 /*
1035 * Free the IRQ, if necessary
1036 */
1037 if (info->port.xmit_buf) {
1038 free_page((unsigned long) info->port.xmit_buf);
1039 info->port.xmit_buf = NULL;
1040 }
1041
1042 info->IER = 0;
1043 outb(0x00, info->ioaddr + UART_IER);
1044
1045 if (tty->termios->c_cflag & HUPCL)
1046 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
1047 outb(info->MCR, info->ioaddr + UART_MCR);
1048
1049 /* clear Rx/Tx FIFO's */
1050 if (info->board->chip_flag)
1051 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT |
1052 MOXA_MUST_FCR_GDA_MODE_ENABLE,
1053 info->ioaddr + UART_FCR);
1054 else
1055 outb(UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT,
1056 info->ioaddr + UART_FCR);
1057
1058 /* read data port to reset things */
1059 (void) inb(info->ioaddr + UART_RX);
1060
1061 set_bit(TTY_IO_ERROR, &tty->flags);
1062
1063 info->port.flags &= ~ASYNC_INITIALIZED;
1064
1065 if (info->board->chip_flag)
1066 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->ioaddr);
1067
1068 spin_unlock_irqrestore(&info->slock, flags);
1069 }
1070
1071 /*
1072 * This routine is called whenever a serial port is opened. It
1073 * enables interrupts for a serial port, linking in its async structure into
1074 * the IRQ chain. It also performs the serial-specific
1075 * initialization for the tty structure.
1076 */
1077 static int mxser_open(struct tty_struct *tty, struct file *filp)
1078 {
1079 struct mxser_port *info;
1080 unsigned long flags;
1081 int retval, line;
1082
1083 line = tty->index;
1084 if (line == MXSER_PORTS)
1085 return 0;
1086 if (line < 0 || line > MXSER_PORTS)
1087 return -ENODEV;
1088 info = &mxser_boards[line / MXSER_PORTS_PER_BOARD].ports[line % MXSER_PORTS_PER_BOARD];
1089 if (!info->ioaddr)
1090 return -ENODEV;
1091
1092 tty->driver_data = info;
1093 tty_port_tty_set(&info->port, tty);
1094 /*
1095 * Start up serial port
1096 */
1097 spin_lock_irqsave(&info->slock, flags);
1098 info->port.count++;
1099 spin_unlock_irqrestore(&info->slock, flags);
1100 retval = mxser_startup(tty);
1101 if (retval)
1102 return retval;
1103
1104 retval = mxser_block_til_ready(tty, filp, info);
1105 if (retval)
1106 return retval;
1107
1108 /* unmark here for very high baud rate (ex. 921600 bps) used */
1109 tty->low_latency = 1;
1110 return 0;
1111 }
1112
1113 static void mxser_flush_buffer(struct tty_struct *tty)
1114 {
1115 struct mxser_port *info = tty->driver_data;
1116 char fcr;
1117 unsigned long flags;
1118
1119
1120 spin_lock_irqsave(&info->slock, flags);
1121 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1122
1123 fcr = inb(info->ioaddr + UART_FCR);
1124 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1125 info->ioaddr + UART_FCR);
1126 outb(fcr, info->ioaddr + UART_FCR);
1127
1128 spin_unlock_irqrestore(&info->slock, flags);
1129
1130 tty_wakeup(tty);
1131 }
1132
1133
1134 /*
1135 * This routine is called when the serial port gets closed. First, we
1136 * wait for the last remaining data to be sent. Then, we unlink its
1137 * async structure from the interrupt chain if necessary, and we free
1138 * that IRQ if nothing is left in the chain.
1139 */
1140 static void mxser_close(struct tty_struct *tty, struct file *filp)
1141 {
1142 struct mxser_port *info = tty->driver_data;
1143
1144 unsigned long timeout;
1145 unsigned long flags;
1146
1147 if (tty->index == MXSER_PORTS)
1148 return;
1149 if (!info)
1150 return;
1151
1152 spin_lock_irqsave(&info->slock, flags);
1153
1154 if (tty_hung_up_p(filp)) {
1155 spin_unlock_irqrestore(&info->slock, flags);
1156 return;
1157 }
1158 if ((tty->count == 1) && (info->port.count != 1)) {
1159 /*
1160 * Uh, oh. tty->count is 1, which means that the tty
1161 * structure will be freed. Info->port.count should always
1162 * be one in these conditions. If it's greater than
1163 * one, we've got real problems, since it means the
1164 * serial port won't be shutdown.
1165 */
1166 printk(KERN_ERR "mxser_close: bad serial port count; "
1167 "tty->count is 1, info->port.count is %d\n", info->port.count);
1168 info->port.count = 1;
1169 }
1170 if (--info->port.count < 0) {
1171 printk(KERN_ERR "mxser_close: bad serial port count for "
1172 "ttys%d: %d\n", tty->index, info->port.count);
1173 info->port.count = 0;
1174 }
1175 if (info->port.count) {
1176 spin_unlock_irqrestore(&info->slock, flags);
1177 return;
1178 }
1179 info->port.flags |= ASYNC_CLOSING;
1180 spin_unlock_irqrestore(&info->slock, flags);
1181 /*
1182 * Save the termios structure, since this port may have
1183 * separate termios for callout and dialin.
1184 */
1185 if (info->port.flags & ASYNC_NORMAL_ACTIVE)
1186 info->normal_termios = *tty->termios;
1187 /*
1188 * Now we wait for the transmit buffer to clear; and we notify
1189 * the line discipline to only process XON/XOFF characters.
1190 */
1191 tty->closing = 1;
1192 if (info->port.closing_wait != ASYNC_CLOSING_WAIT_NONE)
1193 tty_wait_until_sent(tty, info->port.closing_wait);
1194 /*
1195 * At this point we stop accepting input. To do this, we
1196 * disable the receive line status interrupts, and tell the
1197 * interrupt driver to stop checking the data ready bit in the
1198 * line status register.
1199 */
1200 info->IER &= ~UART_IER_RLSI;
1201 if (info->board->chip_flag)
1202 info->IER &= ~MOXA_MUST_RECV_ISR;
1203
1204 if (info->port.flags & ASYNC_INITIALIZED) {
1205 outb(info->IER, info->ioaddr + UART_IER);
1206 /*
1207 * Before we drop DTR, make sure the UART transmitter
1208 * has completely drained; this is especially
1209 * important if there is a transmit FIFO!
1210 */
1211 timeout = jiffies + HZ;
1212 while (!(inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT)) {
1213 schedule_timeout_interruptible(5);
1214 if (time_after(jiffies, timeout))
1215 break;
1216 }
1217 }
1218 mxser_shutdown(tty);
1219
1220 mxser_flush_buffer(tty);
1221 tty_ldisc_flush(tty);
1222
1223 tty->closing = 0;
1224 tty_port_tty_set(&info->port, NULL);
1225 if (info->port.blocked_open) {
1226 if (info->port.close_delay)
1227 schedule_timeout_interruptible(info->port.close_delay);
1228 wake_up_interruptible(&info->port.open_wait);
1229 }
1230
1231 info->port.flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1232 }
1233
1234 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1235 {
1236 int c, total = 0;
1237 struct mxser_port *info = tty->driver_data;
1238 unsigned long flags;
1239
1240 if (!info->port.xmit_buf)
1241 return 0;
1242
1243 while (1) {
1244 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1245 SERIAL_XMIT_SIZE - info->xmit_head));
1246 if (c <= 0)
1247 break;
1248
1249 memcpy(info->port.xmit_buf + info->xmit_head, buf, c);
1250 spin_lock_irqsave(&info->slock, flags);
1251 info->xmit_head = (info->xmit_head + c) &
1252 (SERIAL_XMIT_SIZE - 1);
1253 info->xmit_cnt += c;
1254 spin_unlock_irqrestore(&info->slock, flags);
1255
1256 buf += c;
1257 count -= c;
1258 total += c;
1259 }
1260
1261 if (info->xmit_cnt && !tty->stopped) {
1262 if (!tty->hw_stopped ||
1263 (info->type == PORT_16550A) ||
1264 (info->board->chip_flag)) {
1265 spin_lock_irqsave(&info->slock, flags);
1266 outb(info->IER & ~UART_IER_THRI, info->ioaddr +
1267 UART_IER);
1268 info->IER |= UART_IER_THRI;
1269 outb(info->IER, info->ioaddr + UART_IER);
1270 spin_unlock_irqrestore(&info->slock, flags);
1271 }
1272 }
1273 return total;
1274 }
1275
1276 static int mxser_put_char(struct tty_struct *tty, unsigned char ch)
1277 {
1278 struct mxser_port *info = tty->driver_data;
1279 unsigned long flags;
1280
1281 if (!info->port.xmit_buf)
1282 return 0;
1283
1284 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1285 return 0;
1286
1287 spin_lock_irqsave(&info->slock, flags);
1288 info->port.xmit_buf[info->xmit_head++] = ch;
1289 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1290 info->xmit_cnt++;
1291 spin_unlock_irqrestore(&info->slock, flags);
1292 if (!tty->stopped) {
1293 if (!tty->hw_stopped ||
1294 (info->type == PORT_16550A) ||
1295 info->board->chip_flag) {
1296 spin_lock_irqsave(&info->slock, flags);
1297 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1298 info->IER |= UART_IER_THRI;
1299 outb(info->IER, info->ioaddr + UART_IER);
1300 spin_unlock_irqrestore(&info->slock, flags);
1301 }
1302 }
1303 return 1;
1304 }
1305
1306
1307 static void mxser_flush_chars(struct tty_struct *tty)
1308 {
1309 struct mxser_port *info = tty->driver_data;
1310 unsigned long flags;
1311
1312 if (info->xmit_cnt <= 0 || tty->stopped || !info->port.xmit_buf ||
1313 (tty->hw_stopped && info->type != PORT_16550A &&
1314 !info->board->chip_flag))
1315 return;
1316
1317 spin_lock_irqsave(&info->slock, flags);
1318
1319 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
1320 info->IER |= UART_IER_THRI;
1321 outb(info->IER, info->ioaddr + UART_IER);
1322
1323 spin_unlock_irqrestore(&info->slock, flags);
1324 }
1325
1326 static int mxser_write_room(struct tty_struct *tty)
1327 {
1328 struct mxser_port *info = tty->driver_data;
1329 int ret;
1330
1331 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1332 return ret < 0 ? 0 : ret;
1333 }
1334
1335 static int mxser_chars_in_buffer(struct tty_struct *tty)
1336 {
1337 struct mxser_port *info = tty->driver_data;
1338 return info->xmit_cnt;
1339 }
1340
1341 /*
1342 * ------------------------------------------------------------
1343 * friends of mxser_ioctl()
1344 * ------------------------------------------------------------
1345 */
1346 static int mxser_get_serial_info(struct tty_struct *tty,
1347 struct serial_struct __user *retinfo)
1348 {
1349 struct mxser_port *info = tty->driver_data;
1350 struct serial_struct tmp = {
1351 .type = info->type,
1352 .line = tty->index,
1353 .port = info->ioaddr,
1354 .irq = info->board->irq,
1355 .flags = info->port.flags,
1356 .baud_base = info->baud_base,
1357 .close_delay = info->port.close_delay,
1358 .closing_wait = info->port.closing_wait,
1359 .custom_divisor = info->custom_divisor,
1360 .hub6 = 0
1361 };
1362 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
1363 return -EFAULT;
1364 return 0;
1365 }
1366
1367 static int mxser_set_serial_info(struct tty_struct *tty,
1368 struct serial_struct __user *new_info)
1369 {
1370 struct mxser_port *info = tty->driver_data;
1371 struct serial_struct new_serial;
1372 speed_t baud;
1373 unsigned long sl_flags;
1374 unsigned int flags;
1375 int retval = 0;
1376
1377 if (!new_info || !info->ioaddr)
1378 return -ENODEV;
1379 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
1380 return -EFAULT;
1381
1382 if (new_serial.irq != info->board->irq ||
1383 new_serial.port != info->ioaddr)
1384 return -EINVAL;
1385
1386 flags = info->port.flags & ASYNC_SPD_MASK;
1387
1388 if (!capable(CAP_SYS_ADMIN)) {
1389 if ((new_serial.baud_base != info->baud_base) ||
1390 (new_serial.close_delay != info->port.close_delay) ||
1391 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->port.flags & ~ASYNC_USR_MASK)))
1392 return -EPERM;
1393 info->port.flags = ((info->port.flags & ~ASYNC_USR_MASK) |
1394 (new_serial.flags & ASYNC_USR_MASK));
1395 } else {
1396 /*
1397 * OK, past this point, all the error checking has been done.
1398 * At this point, we start making changes.....
1399 */
1400 info->port.flags = ((info->port.flags & ~ASYNC_FLAGS) |
1401 (new_serial.flags & ASYNC_FLAGS));
1402 info->port.close_delay = new_serial.close_delay * HZ / 100;
1403 info->port.closing_wait = new_serial.closing_wait * HZ / 100;
1404 tty->low_latency = (info->port.flags & ASYNC_LOW_LATENCY)
1405 ? 1 : 0;
1406 if ((info->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST &&
1407 (new_serial.baud_base != info->baud_base ||
1408 new_serial.custom_divisor !=
1409 info->custom_divisor)) {
1410 baud = new_serial.baud_base / new_serial.custom_divisor;
1411 tty_encode_baud_rate(tty, baud, baud);
1412 }
1413 }
1414
1415 info->type = new_serial.type;
1416
1417 process_txrx_fifo(info);
1418
1419 if (info->port.flags & ASYNC_INITIALIZED) {
1420 if (flags != (info->port.flags & ASYNC_SPD_MASK)) {
1421 spin_lock_irqsave(&info->slock, sl_flags);
1422 mxser_change_speed(tty, NULL);
1423 spin_unlock_irqrestore(&info->slock, sl_flags);
1424 }
1425 } else
1426 retval = mxser_startup(tty);
1427
1428 return retval;
1429 }
1430
1431 /*
1432 * mxser_get_lsr_info - get line status register info
1433 *
1434 * Purpose: Let user call ioctl() to get info when the UART physically
1435 * is emptied. On bus types like RS485, the transmitter must
1436 * release the bus after transmitting. This must be done when
1437 * the transmit shift register is empty, not be done when the
1438 * transmit holding register is empty. This functionality
1439 * allows an RS485 driver to be written in user space.
1440 */
1441 static int mxser_get_lsr_info(struct mxser_port *info,
1442 unsigned int __user *value)
1443 {
1444 unsigned char status;
1445 unsigned int result;
1446 unsigned long flags;
1447
1448 spin_lock_irqsave(&info->slock, flags);
1449 status = inb(info->ioaddr + UART_LSR);
1450 spin_unlock_irqrestore(&info->slock, flags);
1451 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
1452 return put_user(result, value);
1453 }
1454
1455 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
1456 {
1457 struct mxser_port *info = tty->driver_data;
1458 unsigned char control, status;
1459 unsigned long flags;
1460
1461
1462 if (tty->index == MXSER_PORTS)
1463 return -ENOIOCTLCMD;
1464 if (test_bit(TTY_IO_ERROR, &tty->flags))
1465 return -EIO;
1466
1467 control = info->MCR;
1468
1469 spin_lock_irqsave(&info->slock, flags);
1470 status = inb(info->ioaddr + UART_MSR);
1471 if (status & UART_MSR_ANY_DELTA)
1472 mxser_check_modem_status(tty, info, status);
1473 spin_unlock_irqrestore(&info->slock, flags);
1474 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
1475 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
1476 ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
1477 ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
1478 ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
1479 ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
1480 }
1481
1482 static int mxser_tiocmset(struct tty_struct *tty, struct file *file,
1483 unsigned int set, unsigned int clear)
1484 {
1485 struct mxser_port *info = tty->driver_data;
1486 unsigned long flags;
1487
1488
1489 if (tty->index == MXSER_PORTS)
1490 return -ENOIOCTLCMD;
1491 if (test_bit(TTY_IO_ERROR, &tty->flags))
1492 return -EIO;
1493
1494 spin_lock_irqsave(&info->slock, flags);
1495
1496 if (set & TIOCM_RTS)
1497 info->MCR |= UART_MCR_RTS;
1498 if (set & TIOCM_DTR)
1499 info->MCR |= UART_MCR_DTR;
1500
1501 if (clear & TIOCM_RTS)
1502 info->MCR &= ~UART_MCR_RTS;
1503 if (clear & TIOCM_DTR)
1504 info->MCR &= ~UART_MCR_DTR;
1505
1506 outb(info->MCR, info->ioaddr + UART_MCR);
1507 spin_unlock_irqrestore(&info->slock, flags);
1508 return 0;
1509 }
1510
1511 static int __init mxser_program_mode(int port)
1512 {
1513 int id, i, j, n;
1514
1515 outb(0, port);
1516 outb(0, port);
1517 outb(0, port);
1518 (void)inb(port);
1519 (void)inb(port);
1520 outb(0, port);
1521 (void)inb(port);
1522
1523 id = inb(port + 1) & 0x1F;
1524 if ((id != C168_ASIC_ID) &&
1525 (id != C104_ASIC_ID) &&
1526 (id != C102_ASIC_ID) &&
1527 (id != CI132_ASIC_ID) &&
1528 (id != CI134_ASIC_ID) &&
1529 (id != CI104J_ASIC_ID))
1530 return -1;
1531 for (i = 0, j = 0; i < 4; i++) {
1532 n = inb(port + 2);
1533 if (n == 'M') {
1534 j = 1;
1535 } else if ((j == 1) && (n == 1)) {
1536 j = 2;
1537 break;
1538 } else
1539 j = 0;
1540 }
1541 if (j != 2)
1542 id = -2;
1543 return id;
1544 }
1545
1546 static void __init mxser_normal_mode(int port)
1547 {
1548 int i, n;
1549
1550 outb(0xA5, port + 1);
1551 outb(0x80, port + 3);
1552 outb(12, port + 0); /* 9600 bps */
1553 outb(0, port + 1);
1554 outb(0x03, port + 3); /* 8 data bits */
1555 outb(0x13, port + 4); /* loop back mode */
1556 for (i = 0; i < 16; i++) {
1557 n = inb(port + 5);
1558 if ((n & 0x61) == 0x60)
1559 break;
1560 if ((n & 1) == 1)
1561 (void)inb(port);
1562 }
1563 outb(0x00, port + 4);
1564 }
1565
1566 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
1567 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
1568 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
1569 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
1570 #define EN_CCMD 0x000 /* Chip's command register */
1571 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
1572 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
1573 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
1574 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
1575 #define EN0_DCFG 0x00E /* Data configuration reg WR */
1576 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
1577 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
1578 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
1579 static int __init mxser_read_register(int port, unsigned short *regs)
1580 {
1581 int i, k, value, id;
1582 unsigned int j;
1583
1584 id = mxser_program_mode(port);
1585 if (id < 0)
1586 return id;
1587 for (i = 0; i < 14; i++) {
1588 k = (i & 0x3F) | 0x180;
1589 for (j = 0x100; j > 0; j >>= 1) {
1590 outb(CHIP_CS, port);
1591 if (k & j) {
1592 outb(CHIP_CS | CHIP_DO, port);
1593 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
1594 } else {
1595 outb(CHIP_CS, port);
1596 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
1597 }
1598 }
1599 (void)inb(port);
1600 value = 0;
1601 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
1602 outb(CHIP_CS, port);
1603 outb(CHIP_CS | CHIP_SK, port);
1604 if (inb(port) & CHIP_DI)
1605 value |= j;
1606 }
1607 regs[i] = value;
1608 outb(0, port);
1609 }
1610 mxser_normal_mode(port);
1611 return id;
1612 }
1613
1614 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1615 {
1616 struct mxser_port *port;
1617 struct tty_struct *tty;
1618 int result, status;
1619 unsigned int i, j;
1620 int ret = 0;
1621
1622 switch (cmd) {
1623 case MOXA_GET_MAJOR:
1624 if (printk_ratelimit())
1625 printk(KERN_WARNING "mxser: '%s' uses deprecated ioctl "
1626 "%x (GET_MAJOR), fix your userspace\n",
1627 current->comm, cmd);
1628 return put_user(ttymajor, (int __user *)argp);
1629
1630 case MOXA_CHKPORTENABLE:
1631 result = 0;
1632 lock_kernel();
1633 for (i = 0; i < MXSER_BOARDS; i++)
1634 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++)
1635 if (mxser_boards[i].ports[j].ioaddr)
1636 result |= (1 << i);
1637 unlock_kernel();
1638 return put_user(result, (unsigned long __user *)argp);
1639 case MOXA_GETDATACOUNT:
1640 lock_kernel();
1641 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1642 ret = -EFAULT;
1643 unlock_kernel();
1644 return ret;
1645 case MOXA_GETMSTATUS: {
1646 struct mxser_mstatus ms, __user *msu = argp;
1647 lock_kernel();
1648 for (i = 0; i < MXSER_BOARDS; i++)
1649 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++) {
1650 port = &mxser_boards[i].ports[j];
1651 memset(&ms, 0, sizeof(ms));
1652
1653 if (!port->ioaddr)
1654 goto copy;
1655
1656 tty = tty_port_tty_get(&port->port);
1657
1658 if (!tty || !tty->termios)
1659 ms.cflag = port->normal_termios.c_cflag;
1660 else
1661 ms.cflag = tty->termios->c_cflag;
1662 tty_kref_put(tty);
1663 status = inb(port->ioaddr + UART_MSR);
1664 if (status & UART_MSR_DCD)
1665 ms.dcd = 1;
1666 if (status & UART_MSR_DSR)
1667 ms.dsr = 1;
1668 if (status & UART_MSR_CTS)
1669 ms.cts = 1;
1670 copy:
1671 if (copy_to_user(msu, &ms, sizeof(ms))) {
1672 unlock_kernel();
1673 return -EFAULT;
1674 }
1675 msu++;
1676 }
1677 unlock_kernel();
1678 return 0;
1679 }
1680 case MOXA_ASPP_MON_EXT: {
1681 struct mxser_mon_ext *me; /* it's 2k, stack unfriendly */
1682 unsigned int cflag, iflag, p;
1683 u8 opmode;
1684
1685 me = kzalloc(sizeof(*me), GFP_KERNEL);
1686 if (!me)
1687 return -ENOMEM;
1688
1689 lock_kernel();
1690 for (i = 0, p = 0; i < MXSER_BOARDS; i++) {
1691 for (j = 0; j < MXSER_PORTS_PER_BOARD; j++, p++) {
1692 if (p >= ARRAY_SIZE(me->rx_cnt)) {
1693 i = MXSER_BOARDS;
1694 break;
1695 }
1696 port = &mxser_boards[i].ports[j];
1697 if (!port->ioaddr)
1698 continue;
1699
1700 status = mxser_get_msr(port->ioaddr, 0, p);
1701
1702 if (status & UART_MSR_TERI)
1703 port->icount.rng++;
1704 if (status & UART_MSR_DDSR)
1705 port->icount.dsr++;
1706 if (status & UART_MSR_DDCD)
1707 port->icount.dcd++;
1708 if (status & UART_MSR_DCTS)
1709 port->icount.cts++;
1710
1711 port->mon_data.modem_status = status;
1712 me->rx_cnt[p] = port->mon_data.rxcnt;
1713 me->tx_cnt[p] = port->mon_data.txcnt;
1714 me->up_rxcnt[p] = port->mon_data.up_rxcnt;
1715 me->up_txcnt[p] = port->mon_data.up_txcnt;
1716 me->modem_status[p] =
1717 port->mon_data.modem_status;
1718 tty = tty_port_tty_get(&port->port);
1719
1720 if (!tty || !tty->termios) {
1721 cflag = port->normal_termios.c_cflag;
1722 iflag = port->normal_termios.c_iflag;
1723 me->baudrate[p] = tty_termios_baud_rate(&port->normal_termios);
1724 } else {
1725 cflag = tty->termios->c_cflag;
1726 iflag = tty->termios->c_iflag;
1727 me->baudrate[p] = tty_get_baud_rate(tty);
1728 }
1729 tty_kref_put(tty);
1730
1731 me->databits[p] = cflag & CSIZE;
1732 me->stopbits[p] = cflag & CSTOPB;
1733 me->parity[p] = cflag & (PARENB | PARODD |
1734 CMSPAR);
1735
1736 if (cflag & CRTSCTS)
1737 me->flowctrl[p] |= 0x03;
1738
1739 if (iflag & (IXON | IXOFF))
1740 me->flowctrl[p] |= 0x0C;
1741
1742 if (port->type == PORT_16550A)
1743 me->fifo[p] = 1;
1744
1745 opmode = inb(port->opmode_ioaddr) >>
1746 ((p % 4) * 2);
1747 opmode &= OP_MODE_MASK;
1748 me->iftype[p] = opmode;
1749 }
1750 }
1751 unlock_kernel();
1752 if (copy_to_user(argp, me, sizeof(*me)))
1753 ret = -EFAULT;
1754 kfree(me);
1755 return ret;
1756 }
1757 default:
1758 return -ENOIOCTLCMD;
1759 }
1760 return 0;
1761 }
1762
1763 static int mxser_cflags_changed(struct mxser_port *info, unsigned long arg,
1764 struct async_icount *cprev)
1765 {
1766 struct async_icount cnow;
1767 unsigned long flags;
1768 int ret;
1769
1770 spin_lock_irqsave(&info->slock, flags);
1771 cnow = info->icount; /* atomic copy */
1772 spin_unlock_irqrestore(&info->slock, flags);
1773
1774 ret = ((arg & TIOCM_RNG) && (cnow.rng != cprev->rng)) ||
1775 ((arg & TIOCM_DSR) && (cnow.dsr != cprev->dsr)) ||
1776 ((arg & TIOCM_CD) && (cnow.dcd != cprev->dcd)) ||
1777 ((arg & TIOCM_CTS) && (cnow.cts != cprev->cts));
1778
1779 *cprev = cnow;
1780
1781 return ret;
1782 }
1783
1784 static int mxser_ioctl(struct tty_struct *tty, struct file *file,
1785 unsigned int cmd, unsigned long arg)
1786 {
1787 struct mxser_port *info = tty->driver_data;
1788 struct async_icount cnow;
1789 unsigned long flags;
1790 void __user *argp = (void __user *)arg;
1791 int retval;
1792
1793 if (tty->index == MXSER_PORTS)
1794 return mxser_ioctl_special(cmd, argp);
1795
1796 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1797 int p;
1798 unsigned long opmode;
1799 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1800 int shiftbit;
1801 unsigned char val, mask;
1802
1803 p = tty->index % 4;
1804 if (cmd == MOXA_SET_OP_MODE) {
1805 if (get_user(opmode, (int __user *) argp))
1806 return -EFAULT;
1807 if (opmode != RS232_MODE &&
1808 opmode != RS485_2WIRE_MODE &&
1809 opmode != RS422_MODE &&
1810 opmode != RS485_4WIRE_MODE)
1811 return -EFAULT;
1812 lock_kernel();
1813 mask = ModeMask[p];
1814 shiftbit = p * 2;
1815 val = inb(info->opmode_ioaddr);
1816 val &= mask;
1817 val |= (opmode << shiftbit);
1818 outb(val, info->opmode_ioaddr);
1819 unlock_kernel();
1820 } else {
1821 lock_kernel();
1822 shiftbit = p * 2;
1823 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1824 opmode &= OP_MODE_MASK;
1825 unlock_kernel();
1826 if (put_user(opmode, (int __user *)argp))
1827 return -EFAULT;
1828 }
1829 return 0;
1830 }
1831
1832 if (cmd != TIOCGSERIAL && cmd != TIOCMIWAIT && cmd != TIOCGICOUNT &&
1833 test_bit(TTY_IO_ERROR, &tty->flags))
1834 return -EIO;
1835
1836 switch (cmd) {
1837 case TIOCGSERIAL:
1838 lock_kernel();
1839 retval = mxser_get_serial_info(tty, argp);
1840 unlock_kernel();
1841 return retval;
1842 case TIOCSSERIAL:
1843 lock_kernel();
1844 retval = mxser_set_serial_info(tty, argp);
1845 unlock_kernel();
1846 return retval;
1847 case TIOCSERGETLSR: /* Get line status register */
1848 return mxser_get_lsr_info(info, argp);
1849 /*
1850 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1851 * - mask passed in arg for lines of interest
1852 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1853 * Caller should use TIOCGICOUNT to see which one it was
1854 */
1855 case TIOCMIWAIT:
1856 spin_lock_irqsave(&info->slock, flags);
1857 cnow = info->icount; /* note the counters on entry */
1858 spin_unlock_irqrestore(&info->slock, flags);
1859
1860 return wait_event_interruptible(info->delta_msr_wait,
1861 mxser_cflags_changed(info, arg, &cnow));
1862 /*
1863 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1864 * Return: write counters to the user passed counter struct
1865 * NB: both 1->0 and 0->1 transitions are counted except for
1866 * RI where only 0->1 is counted.
1867 */
1868 case TIOCGICOUNT: {
1869 struct serial_icounter_struct icnt = { 0 };
1870 spin_lock_irqsave(&info->slock, flags);
1871 cnow = info->icount;
1872 spin_unlock_irqrestore(&info->slock, flags);
1873
1874 icnt.frame = cnow.frame;
1875 icnt.brk = cnow.brk;
1876 icnt.overrun = cnow.overrun;
1877 icnt.buf_overrun = cnow.buf_overrun;
1878 icnt.parity = cnow.parity;
1879 icnt.rx = cnow.rx;
1880 icnt.tx = cnow.tx;
1881 icnt.cts = cnow.cts;
1882 icnt.dsr = cnow.dsr;
1883 icnt.rng = cnow.rng;
1884 icnt.dcd = cnow.dcd;
1885
1886 return copy_to_user(argp, &icnt, sizeof(icnt)) ? -EFAULT : 0;
1887 }
1888 case MOXA_HighSpeedOn:
1889 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1890 case MOXA_SDS_RSTICOUNTER:
1891 lock_kernel();
1892 info->mon_data.rxcnt = 0;
1893 info->mon_data.txcnt = 0;
1894 unlock_kernel();
1895 return 0;
1896
1897 case MOXA_ASPP_OQUEUE:{
1898 int len, lsr;
1899
1900 lock_kernel();
1901 len = mxser_chars_in_buffer(tty);
1902 lsr = inb(info->ioaddr + UART_LSR) & UART_LSR_TEMT;
1903 len += (lsr ? 0 : 1);
1904 unlock_kernel();
1905
1906 return put_user(len, (int __user *)argp);
1907 }
1908 case MOXA_ASPP_MON: {
1909 int mcr, status;
1910
1911 lock_kernel();
1912 status = mxser_get_msr(info->ioaddr, 1, tty->index);
1913 mxser_check_modem_status(tty, info, status);
1914
1915 mcr = inb(info->ioaddr + UART_MCR);
1916 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1917 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1918 else
1919 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1920
1921 if (mcr & MOXA_MUST_MCR_TX_XON)
1922 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1923 else
1924 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1925
1926 if (tty->hw_stopped)
1927 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1928 else
1929 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1930 unlock_kernel();
1931 if (copy_to_user(argp, &info->mon_data,
1932 sizeof(struct mxser_mon)))
1933 return -EFAULT;
1934
1935 return 0;
1936 }
1937 case MOXA_ASPP_LSTATUS: {
1938 if (put_user(info->err_shadow, (unsigned char __user *)argp))
1939 return -EFAULT;
1940
1941 info->err_shadow = 0;
1942 return 0;
1943 }
1944 case MOXA_SET_BAUD_METHOD: {
1945 int method;
1946
1947 if (get_user(method, (int __user *)argp))
1948 return -EFAULT;
1949 mxser_set_baud_method[tty->index] = method;
1950 return put_user(method, (int __user *)argp);
1951 }
1952 default:
1953 return -ENOIOCTLCMD;
1954 }
1955 return 0;
1956 }
1957
1958 static void mxser_stoprx(struct tty_struct *tty)
1959 {
1960 struct mxser_port *info = tty->driver_data;
1961
1962 info->ldisc_stop_rx = 1;
1963 if (I_IXOFF(tty)) {
1964 if (info->board->chip_flag) {
1965 info->IER &= ~MOXA_MUST_RECV_ISR;
1966 outb(info->IER, info->ioaddr + UART_IER);
1967 } else {
1968 info->x_char = STOP_CHAR(tty);
1969 outb(0, info->ioaddr + UART_IER);
1970 info->IER |= UART_IER_THRI;
1971 outb(info->IER, info->ioaddr + UART_IER);
1972 }
1973 }
1974
1975 if (tty->termios->c_cflag & CRTSCTS) {
1976 info->MCR &= ~UART_MCR_RTS;
1977 outb(info->MCR, info->ioaddr + UART_MCR);
1978 }
1979 }
1980
1981 /*
1982 * This routine is called by the upper-layer tty layer to signal that
1983 * incoming characters should be throttled.
1984 */
1985 static void mxser_throttle(struct tty_struct *tty)
1986 {
1987 mxser_stoprx(tty);
1988 }
1989
1990 static void mxser_unthrottle(struct tty_struct *tty)
1991 {
1992 struct mxser_port *info = tty->driver_data;
1993
1994 /* startrx */
1995 info->ldisc_stop_rx = 0;
1996 if (I_IXOFF(tty)) {
1997 if (info->x_char)
1998 info->x_char = 0;
1999 else {
2000 if (info->board->chip_flag) {
2001 info->IER |= MOXA_MUST_RECV_ISR;
2002 outb(info->IER, info->ioaddr + UART_IER);
2003 } else {
2004 info->x_char = START_CHAR(tty);
2005 outb(0, info->ioaddr + UART_IER);
2006 info->IER |= UART_IER_THRI;
2007 outb(info->IER, info->ioaddr + UART_IER);
2008 }
2009 }
2010 }
2011
2012 if (tty->termios->c_cflag & CRTSCTS) {
2013 info->MCR |= UART_MCR_RTS;
2014 outb(info->MCR, info->ioaddr + UART_MCR);
2015 }
2016 }
2017
2018 /*
2019 * mxser_stop() and mxser_start()
2020 *
2021 * This routines are called before setting or resetting tty->stopped.
2022 * They enable or disable transmitter interrupts, as necessary.
2023 */
2024 static void mxser_stop(struct tty_struct *tty)
2025 {
2026 struct mxser_port *info = tty->driver_data;
2027 unsigned long flags;
2028
2029 spin_lock_irqsave(&info->slock, flags);
2030 if (info->IER & UART_IER_THRI) {
2031 info->IER &= ~UART_IER_THRI;
2032 outb(info->IER, info->ioaddr + UART_IER);
2033 }
2034 spin_unlock_irqrestore(&info->slock, flags);
2035 }
2036
2037 static void mxser_start(struct tty_struct *tty)
2038 {
2039 struct mxser_port *info = tty->driver_data;
2040 unsigned long flags;
2041
2042 spin_lock_irqsave(&info->slock, flags);
2043 if (info->xmit_cnt && info->port.xmit_buf) {
2044 outb(info->IER & ~UART_IER_THRI, info->ioaddr + UART_IER);
2045 info->IER |= UART_IER_THRI;
2046 outb(info->IER, info->ioaddr + UART_IER);
2047 }
2048 spin_unlock_irqrestore(&info->slock, flags);
2049 }
2050
2051 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
2052 {
2053 struct mxser_port *info = tty->driver_data;
2054 unsigned long flags;
2055
2056 spin_lock_irqsave(&info->slock, flags);
2057 mxser_change_speed(tty, old_termios);
2058 spin_unlock_irqrestore(&info->slock, flags);
2059
2060 if ((old_termios->c_cflag & CRTSCTS) &&
2061 !(tty->termios->c_cflag & CRTSCTS)) {
2062 tty->hw_stopped = 0;
2063 mxser_start(tty);
2064 }
2065
2066 /* Handle sw stopped */
2067 if ((old_termios->c_iflag & IXON) &&
2068 !(tty->termios->c_iflag & IXON)) {
2069 tty->stopped = 0;
2070
2071 if (info->board->chip_flag) {
2072 spin_lock_irqsave(&info->slock, flags);
2073 mxser_disable_must_rx_software_flow_control(
2074 info->ioaddr);
2075 spin_unlock_irqrestore(&info->slock, flags);
2076 }
2077
2078 mxser_start(tty);
2079 }
2080 }
2081
2082 /*
2083 * mxser_wait_until_sent() --- wait until the transmitter is empty
2084 */
2085 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
2086 {
2087 struct mxser_port *info = tty->driver_data;
2088 unsigned long orig_jiffies, char_time;
2089 int lsr;
2090
2091 if (info->type == PORT_UNKNOWN)
2092 return;
2093
2094 if (info->xmit_fifo_size == 0)
2095 return; /* Just in case.... */
2096
2097 orig_jiffies = jiffies;
2098 /*
2099 * Set the check interval to be 1/5 of the estimated time to
2100 * send a single character, and make it at least 1. The check
2101 * interval should also be less than the timeout.
2102 *
2103 * Note: we have to use pretty tight timings here to satisfy
2104 * the NIST-PCTS.
2105 */
2106 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
2107 char_time = char_time / 5;
2108 if (char_time == 0)
2109 char_time = 1;
2110 if (timeout && timeout < char_time)
2111 char_time = timeout;
2112 /*
2113 * If the transmitter hasn't cleared in twice the approximate
2114 * amount of time to send the entire FIFO, it probably won't
2115 * ever clear. This assumes the UART isn't doing flow
2116 * control, which is currently the case. Hence, if it ever
2117 * takes longer than info->timeout, this is probably due to a
2118 * UART bug of some kind. So, we clamp the timeout parameter at
2119 * 2*info->timeout.
2120 */
2121 if (!timeout || timeout > 2 * info->timeout)
2122 timeout = 2 * info->timeout;
2123 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2124 printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
2125 timeout, char_time);
2126 printk("jiff=%lu...", jiffies);
2127 #endif
2128 lock_kernel();
2129 while (!((lsr = inb(info->ioaddr + UART_LSR)) & UART_LSR_TEMT)) {
2130 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2131 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
2132 #endif
2133 schedule_timeout_interruptible(char_time);
2134 if (signal_pending(current))
2135 break;
2136 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2137 break;
2138 }
2139 set_current_state(TASK_RUNNING);
2140 unlock_kernel();
2141
2142 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2143 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
2144 #endif
2145 }
2146
2147 /*
2148 * This routine is called by tty_hangup() when a hangup is signaled.
2149 */
2150 static void mxser_hangup(struct tty_struct *tty)
2151 {
2152 struct mxser_port *info = tty->driver_data;
2153
2154 mxser_flush_buffer(tty);
2155 mxser_shutdown(tty);
2156 info->port.count = 0;
2157 info->port.flags &= ~ASYNC_NORMAL_ACTIVE;
2158 tty_port_tty_set(&info->port, NULL);
2159 wake_up_interruptible(&info->port.open_wait);
2160 }
2161
2162 /*
2163 * mxser_rs_break() --- routine which turns the break handling on or off
2164 */
2165 static int mxser_rs_break(struct tty_struct *tty, int break_state)
2166 {
2167 struct mxser_port *info = tty->driver_data;
2168 unsigned long flags;
2169
2170 spin_lock_irqsave(&info->slock, flags);
2171 if (break_state == -1)
2172 outb(inb(info->ioaddr + UART_LCR) | UART_LCR_SBC,
2173 info->ioaddr + UART_LCR);
2174 else
2175 outb(inb(info->ioaddr + UART_LCR) & ~UART_LCR_SBC,
2176 info->ioaddr + UART_LCR);
2177 spin_unlock_irqrestore(&info->slock, flags);
2178 return 0;
2179 }
2180
2181 static void mxser_receive_chars(struct tty_struct *tty,
2182 struct mxser_port *port, int *status)
2183 {
2184 unsigned char ch, gdl;
2185 int ignored = 0;
2186 int cnt = 0;
2187 int recv_room;
2188 int max = 256;
2189
2190 recv_room = tty->receive_room;
2191 if (recv_room == 0 && !port->ldisc_stop_rx)
2192 mxser_stoprx(tty);
2193 if (port->board->chip_flag != MOXA_OTHER_UART) {
2194
2195 if (*status & UART_LSR_SPECIAL)
2196 goto intr_old;
2197 if (port->board->chip_flag == MOXA_MUST_MU860_HWID &&
2198 (*status & MOXA_MUST_LSR_RERR))
2199 goto intr_old;
2200 if (*status & MOXA_MUST_LSR_RERR)
2201 goto intr_old;
2202
2203 gdl = inb(port->ioaddr + MOXA_MUST_GDL_REGISTER);
2204
2205 if (port->board->chip_flag == MOXA_MUST_MU150_HWID)
2206 gdl &= MOXA_MUST_GDL_MASK;
2207 if (gdl >= recv_room) {
2208 if (!port->ldisc_stop_rx)
2209 mxser_stoprx(tty);
2210 }
2211 while (gdl--) {
2212 ch = inb(port->ioaddr + UART_RX);
2213 tty_insert_flip_char(tty, ch, 0);
2214 cnt++;
2215 }
2216 goto end_intr;
2217 }
2218 intr_old:
2219
2220 do {
2221 if (max-- < 0)
2222 break;
2223
2224 ch = inb(port->ioaddr + UART_RX);
2225 if (port->board->chip_flag && (*status & UART_LSR_OE))
2226 outb(0x23, port->ioaddr + UART_FCR);
2227 *status &= port->read_status_mask;
2228 if (*status & port->ignore_status_mask) {
2229 if (++ignored > 100)
2230 break;
2231 } else {
2232 char flag = 0;
2233 if (*status & UART_LSR_SPECIAL) {
2234 if (*status & UART_LSR_BI) {
2235 flag = TTY_BREAK;
2236 port->icount.brk++;
2237
2238 if (port->port.flags & ASYNC_SAK)
2239 do_SAK(tty);
2240 } else if (*status & UART_LSR_PE) {
2241 flag = TTY_PARITY;
2242 port->icount.parity++;
2243 } else if (*status & UART_LSR_FE) {
2244 flag = TTY_FRAME;
2245 port->icount.frame++;
2246 } else if (*status & UART_LSR_OE) {
2247 flag = TTY_OVERRUN;
2248 port->icount.overrun++;
2249 } else
2250 flag = TTY_BREAK;
2251 }
2252 tty_insert_flip_char(tty, ch, flag);
2253 cnt++;
2254 if (cnt >= recv_room) {
2255 if (!port->ldisc_stop_rx)
2256 mxser_stoprx(tty);
2257 break;
2258 }
2259
2260 }
2261
2262 if (port->board->chip_flag)
2263 break;
2264
2265 *status = inb(port->ioaddr + UART_LSR);
2266 } while (*status & UART_LSR_DR);
2267
2268 end_intr:
2269 mxvar_log.rxcnt[tty->index] += cnt;
2270 port->mon_data.rxcnt += cnt;
2271 port->mon_data.up_rxcnt += cnt;
2272
2273 /*
2274 * We are called from an interrupt context with &port->slock
2275 * being held. Drop it temporarily in order to prevent
2276 * recursive locking.
2277 */
2278 spin_unlock(&port->slock);
2279 tty_flip_buffer_push(tty);
2280 spin_lock(&port->slock);
2281 }
2282
2283 static void mxser_transmit_chars(struct tty_struct *tty, struct mxser_port *port)
2284 {
2285 int count, cnt;
2286
2287 if (port->x_char) {
2288 outb(port->x_char, port->ioaddr + UART_TX);
2289 port->x_char = 0;
2290 mxvar_log.txcnt[tty->index]++;
2291 port->mon_data.txcnt++;
2292 port->mon_data.up_txcnt++;
2293 port->icount.tx++;
2294 return;
2295 }
2296
2297 if (port->port.xmit_buf == NULL)
2298 return;
2299
2300 if (port->xmit_cnt <= 0 || tty->stopped ||
2301 (tty->hw_stopped &&
2302 (port->type != PORT_16550A) &&
2303 (!port->board->chip_flag))) {
2304 port->IER &= ~UART_IER_THRI;
2305 outb(port->IER, port->ioaddr + UART_IER);
2306 return;
2307 }
2308
2309 cnt = port->xmit_cnt;
2310 count = port->xmit_fifo_size;
2311 do {
2312 outb(port->port.xmit_buf[port->xmit_tail++],
2313 port->ioaddr + UART_TX);
2314 port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2315 if (--port->xmit_cnt <= 0)
2316 break;
2317 } while (--count > 0);
2318 mxvar_log.txcnt[tty->index] += (cnt - port->xmit_cnt);
2319
2320 port->mon_data.txcnt += (cnt - port->xmit_cnt);
2321 port->mon_data.up_txcnt += (cnt - port->xmit_cnt);
2322 port->icount.tx += (cnt - port->xmit_cnt);
2323
2324 if (port->xmit_cnt < WAKEUP_CHARS && tty)
2325 tty_wakeup(tty);
2326
2327 if (port->xmit_cnt <= 0) {
2328 port->IER &= ~UART_IER_THRI;
2329 outb(port->IER, port->ioaddr + UART_IER);
2330 }
2331 }
2332
2333 /*
2334 * This is the serial driver's generic interrupt routine
2335 */
2336 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
2337 {
2338 int status, iir, i;
2339 struct mxser_board *brd = NULL;
2340 struct mxser_port *port;
2341 int max, irqbits, bits, msr;
2342 unsigned int int_cnt, pass_counter = 0;
2343 int handled = IRQ_NONE;
2344 struct tty_struct *tty;
2345
2346 for (i = 0; i < MXSER_BOARDS; i++)
2347 if (dev_id == &mxser_boards[i]) {
2348 brd = dev_id;
2349 break;
2350 }
2351
2352 if (i == MXSER_BOARDS)
2353 goto irq_stop;
2354 if (brd == NULL)
2355 goto irq_stop;
2356 max = brd->info->nports;
2357 while (pass_counter++ < MXSER_ISR_PASS_LIMIT) {
2358 irqbits = inb(brd->vector) & brd->vector_mask;
2359 if (irqbits == brd->vector_mask)
2360 break;
2361
2362 handled = IRQ_HANDLED;
2363 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
2364 if (irqbits == brd->vector_mask)
2365 break;
2366 if (bits & irqbits)
2367 continue;
2368 port = &brd->ports[i];
2369
2370 int_cnt = 0;
2371 spin_lock(&port->slock);
2372 do {
2373 iir = inb(port->ioaddr + UART_IIR);
2374 if (iir & UART_IIR_NO_INT)
2375 break;
2376 iir &= MOXA_MUST_IIR_MASK;
2377 tty = tty_port_tty_get(&port->port);
2378 if (!tty ||
2379 (port->port.flags & ASYNC_CLOSING) ||
2380 !(port->port.flags &
2381 ASYNC_INITIALIZED)) {
2382 status = inb(port->ioaddr + UART_LSR);
2383 outb(0x27, port->ioaddr + UART_FCR);
2384 inb(port->ioaddr + UART_MSR);
2385 tty_kref_put(tty);
2386 break;
2387 }
2388
2389 status = inb(port->ioaddr + UART_LSR);
2390
2391 if (status & UART_LSR_PE)
2392 port->err_shadow |= NPPI_NOTIFY_PARITY;
2393 if (status & UART_LSR_FE)
2394 port->err_shadow |= NPPI_NOTIFY_FRAMING;
2395 if (status & UART_LSR_OE)
2396 port->err_shadow |=
2397 NPPI_NOTIFY_HW_OVERRUN;
2398 if (status & UART_LSR_BI)
2399 port->err_shadow |= NPPI_NOTIFY_BREAK;
2400
2401 if (port->board->chip_flag) {
2402 if (iir == MOXA_MUST_IIR_GDA ||
2403 iir == MOXA_MUST_IIR_RDA ||
2404 iir == MOXA_MUST_IIR_RTO ||
2405 iir == MOXA_MUST_IIR_LSR)
2406 mxser_receive_chars(tty, port,
2407 &status);
2408
2409 } else {
2410 status &= port->read_status_mask;
2411 if (status & UART_LSR_DR)
2412 mxser_receive_chars(tty, port,
2413 &status);
2414 }
2415 msr = inb(port->ioaddr + UART_MSR);
2416 if (msr & UART_MSR_ANY_DELTA)
2417 mxser_check_modem_status(tty, port, msr);
2418
2419 if (port->board->chip_flag) {
2420 if (iir == 0x02 && (status &
2421 UART_LSR_THRE))
2422 mxser_transmit_chars(tty, port);
2423 } else {
2424 if (status & UART_LSR_THRE)
2425 mxser_transmit_chars(tty, port);
2426 }
2427 tty_kref_put(tty);
2428 } while (int_cnt++ < MXSER_ISR_PASS_LIMIT);
2429 spin_unlock(&port->slock);
2430 }
2431 }
2432
2433 irq_stop:
2434 return handled;
2435 }
2436
2437 static const struct tty_operations mxser_ops = {
2438 .open = mxser_open,
2439 .close = mxser_close,
2440 .write = mxser_write,
2441 .put_char = mxser_put_char,
2442 .flush_chars = mxser_flush_chars,
2443 .write_room = mxser_write_room,
2444 .chars_in_buffer = mxser_chars_in_buffer,
2445 .flush_buffer = mxser_flush_buffer,
2446 .ioctl = mxser_ioctl,
2447 .throttle = mxser_throttle,
2448 .unthrottle = mxser_unthrottle,
2449 .set_termios = mxser_set_termios,
2450 .stop = mxser_stop,
2451 .start = mxser_start,
2452 .hangup = mxser_hangup,
2453 .break_ctl = mxser_rs_break,
2454 .wait_until_sent = mxser_wait_until_sent,
2455 .tiocmget = mxser_tiocmget,
2456 .tiocmset = mxser_tiocmset,
2457 };
2458
2459 struct tty_port_operations mxser_port_ops = {
2460 .carrier_raised = mxser_carrier_raised,
2461 };
2462
2463 /*
2464 * The MOXA Smartio/Industio serial driver boot-time initialization code!
2465 */
2466
2467 static void mxser_release_res(struct mxser_board *brd, struct pci_dev *pdev,
2468 unsigned int irq)
2469 {
2470 if (irq)
2471 free_irq(brd->irq, brd);
2472 if (pdev != NULL) { /* PCI */
2473 #ifdef CONFIG_PCI
2474 pci_release_region(pdev, 2);
2475 pci_release_region(pdev, 3);
2476 #endif
2477 } else {
2478 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2479 release_region(brd->vector, 1);
2480 }
2481 }
2482
2483 static int __devinit mxser_initbrd(struct mxser_board *brd,
2484 struct pci_dev *pdev)
2485 {
2486 struct mxser_port *info;
2487 unsigned int i;
2488 int retval;
2489
2490 printk(KERN_INFO "mxser: max. baud rate = %d bps\n",
2491 brd->ports[0].max_baud);
2492
2493 for (i = 0; i < brd->info->nports; i++) {
2494 info = &brd->ports[i];
2495 tty_port_init(&info->port);
2496 info->port.ops = &mxser_port_ops;
2497 info->board = brd;
2498 info->stop_rx = 0;
2499 info->ldisc_stop_rx = 0;
2500
2501 /* Enhance mode enabled here */
2502 if (brd->chip_flag != MOXA_OTHER_UART)
2503 mxser_enable_must_enchance_mode(info->ioaddr);
2504
2505 info->port.flags = ASYNC_SHARE_IRQ;
2506 info->type = brd->uart_type;
2507
2508 process_txrx_fifo(info);
2509
2510 info->custom_divisor = info->baud_base * 16;
2511 info->port.close_delay = 5 * HZ / 10;
2512 info->port.closing_wait = 30 * HZ;
2513 info->normal_termios = mxvar_sdriver->init_termios;
2514 init_waitqueue_head(&info->delta_msr_wait);
2515 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
2516 info->err_shadow = 0;
2517 spin_lock_init(&info->slock);
2518
2519 /* before set INT ISR, disable all int */
2520 outb(inb(info->ioaddr + UART_IER) & 0xf0,
2521 info->ioaddr + UART_IER);
2522 }
2523
2524 retval = request_irq(brd->irq, mxser_interrupt, IRQF_SHARED, "mxser",
2525 brd);
2526 if (retval) {
2527 printk(KERN_ERR "Board %s: Request irq failed, IRQ (%d) may "
2528 "conflict with another device.\n",
2529 brd->info->name, brd->irq);
2530 /* We hold resources, we need to release them. */
2531 mxser_release_res(brd, pdev, 0);
2532 }
2533 return retval;
2534 }
2535
2536 static int __init mxser_get_ISA_conf(int cap, struct mxser_board *brd)
2537 {
2538 int id, i, bits;
2539 unsigned short regs[16], irq;
2540 unsigned char scratch, scratch2;
2541
2542 brd->chip_flag = MOXA_OTHER_UART;
2543
2544 id = mxser_read_register(cap, regs);
2545 switch (id) {
2546 case C168_ASIC_ID:
2547 brd->info = &mxser_cards[0];
2548 break;
2549 case C104_ASIC_ID:
2550 brd->info = &mxser_cards[1];
2551 break;
2552 case CI104J_ASIC_ID:
2553 brd->info = &mxser_cards[2];
2554 break;
2555 case C102_ASIC_ID:
2556 brd->info = &mxser_cards[5];
2557 break;
2558 case CI132_ASIC_ID:
2559 brd->info = &mxser_cards[6];
2560 break;
2561 case CI134_ASIC_ID:
2562 brd->info = &mxser_cards[7];
2563 break;
2564 default:
2565 return 0;
2566 }
2567
2568 irq = 0;
2569 /* some ISA cards have 2 ports, but we want to see them as 4-port (why?)
2570 Flag-hack checks if configuration should be read as 2-port here. */
2571 if (brd->info->nports == 2 || (brd->info->flags & MXSER_HAS2)) {
2572 irq = regs[9] & 0xF000;
2573 irq = irq | (irq >> 4);
2574 if (irq != (regs[9] & 0xFF00))
2575 goto err_irqconflict;
2576 } else if (brd->info->nports == 4) {
2577 irq = regs[9] & 0xF000;
2578 irq = irq | (irq >> 4);
2579 irq = irq | (irq >> 8);
2580 if (irq != regs[9])
2581 goto err_irqconflict;
2582 } else if (brd->info->nports == 8) {
2583 irq = regs[9] & 0xF000;
2584 irq = irq | (irq >> 4);
2585 irq = irq | (irq >> 8);
2586 if ((irq != regs[9]) || (irq != regs[10]))
2587 goto err_irqconflict;
2588 }
2589
2590 if (!irq) {
2591 printk(KERN_ERR "mxser: interrupt number unset\n");
2592 return -EIO;
2593 }
2594 brd->irq = ((int)(irq & 0xF000) >> 12);
2595 for (i = 0; i < 8; i++)
2596 brd->ports[i].ioaddr = (int) regs[i + 1] & 0xFFF8;
2597 if ((regs[12] & 0x80) == 0) {
2598 printk(KERN_ERR "mxser: invalid interrupt vector\n");
2599 return -EIO;
2600 }
2601 brd->vector = (int)regs[11]; /* interrupt vector */
2602 if (id == 1)
2603 brd->vector_mask = 0x00FF;
2604 else
2605 brd->vector_mask = 0x000F;
2606 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2607 if (regs[12] & bits) {
2608 brd->ports[i].baud_base = 921600;
2609 brd->ports[i].max_baud = 921600;
2610 } else {
2611 brd->ports[i].baud_base = 115200;
2612 brd->ports[i].max_baud = 115200;
2613 }
2614 }
2615 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
2616 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
2617 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
2618 outb(scratch2, cap + UART_LCR);
2619 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
2620 scratch = inb(cap + UART_IIR);
2621
2622 if (scratch & 0xC0)
2623 brd->uart_type = PORT_16550A;
2624 else
2625 brd->uart_type = PORT_16450;
2626 if (!request_region(brd->ports[0].ioaddr, 8 * brd->info->nports,
2627 "mxser(IO)")) {
2628 printk(KERN_ERR "mxser: can't request ports I/O region: "
2629 "0x%.8lx-0x%.8lx\n",
2630 brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2631 8 * brd->info->nports - 1);
2632 return -EIO;
2633 }
2634 if (!request_region(brd->vector, 1, "mxser(vector)")) {
2635 release_region(brd->ports[0].ioaddr, 8 * brd->info->nports);
2636 printk(KERN_ERR "mxser: can't request interrupt vector region: "
2637 "0x%.8lx-0x%.8lx\n",
2638 brd->ports[0].ioaddr, brd->ports[0].ioaddr +
2639 8 * brd->info->nports - 1);
2640 return -EIO;
2641 }
2642 return brd->info->nports;
2643
2644 err_irqconflict:
2645 printk(KERN_ERR "mxser: invalid interrupt number\n");
2646 return -EIO;
2647 }
2648
2649 static int __devinit mxser_probe(struct pci_dev *pdev,
2650 const struct pci_device_id *ent)
2651 {
2652 #ifdef CONFIG_PCI
2653 struct mxser_board *brd;
2654 unsigned int i, j;
2655 unsigned long ioaddress;
2656 int retval = -EINVAL;
2657
2658 for (i = 0; i < MXSER_BOARDS; i++)
2659 if (mxser_boards[i].info == NULL)
2660 break;
2661
2662 if (i >= MXSER_BOARDS) {
2663 dev_err(&pdev->dev, "too many boards found (maximum %d), board "
2664 "not configured\n", MXSER_BOARDS);
2665 goto err;
2666 }
2667
2668 brd = &mxser_boards[i];
2669 brd->idx = i * MXSER_PORTS_PER_BOARD;
2670 dev_info(&pdev->dev, "found MOXA %s board (BusNo=%d, DevNo=%d)\n",
2671 mxser_cards[ent->driver_data].name,
2672 pdev->bus->number, PCI_SLOT(pdev->devfn));
2673
2674 retval = pci_enable_device(pdev);
2675 if (retval) {
2676 dev_err(&pdev->dev, "PCI enable failed\n");
2677 goto err;
2678 }
2679
2680 /* io address */
2681 ioaddress = pci_resource_start(pdev, 2);
2682 retval = pci_request_region(pdev, 2, "mxser(IO)");
2683 if (retval)
2684 goto err;
2685
2686 brd->info = &mxser_cards[ent->driver_data];
2687 for (i = 0; i < brd->info->nports; i++)
2688 brd->ports[i].ioaddr = ioaddress + 8 * i;
2689
2690 /* vector */
2691 ioaddress = pci_resource_start(pdev, 3);
2692 retval = pci_request_region(pdev, 3, "mxser(vector)");
2693 if (retval)
2694 goto err_relio;
2695 brd->vector = ioaddress;
2696
2697 /* irq */
2698 brd->irq = pdev->irq;
2699
2700 brd->chip_flag = CheckIsMoxaMust(brd->ports[0].ioaddr);
2701 brd->uart_type = PORT_16550A;
2702 brd->vector_mask = 0;
2703
2704 for (i = 0; i < brd->info->nports; i++) {
2705 for (j = 0; j < UART_INFO_NUM; j++) {
2706 if (Gpci_uart_info[j].type == brd->chip_flag) {
2707 brd->ports[i].max_baud =
2708 Gpci_uart_info[j].max_baud;
2709
2710 /* exception....CP-102 */
2711 if (brd->info->flags & MXSER_HIGHBAUD)
2712 brd->ports[i].max_baud = 921600;
2713 break;
2714 }
2715 }
2716 }
2717
2718 if (brd->chip_flag == MOXA_MUST_MU860_HWID) {
2719 for (i = 0; i < brd->info->nports; i++) {
2720 if (i < 4)
2721 brd->ports[i].opmode_ioaddr = ioaddress + 4;
2722 else
2723 brd->ports[i].opmode_ioaddr = ioaddress + 0x0c;
2724 }
2725 outb(0, ioaddress + 4); /* default set to RS232 mode */
2726 outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
2727 }
2728
2729 for (i = 0; i < brd->info->nports; i++) {
2730 brd->vector_mask |= (1 << i);
2731 brd->ports[i].baud_base = 921600;
2732 }
2733
2734 /* mxser_initbrd will hook ISR. */
2735 retval = mxser_initbrd(brd, pdev);
2736 if (retval)
2737 goto err_null;
2738
2739 for (i = 0; i < brd->info->nports; i++)
2740 tty_register_device(mxvar_sdriver, brd->idx + i, &pdev->dev);
2741
2742 pci_set_drvdata(pdev, brd);
2743
2744 return 0;
2745 err_relio:
2746 pci_release_region(pdev, 2);
2747 err_null:
2748 brd->info = NULL;
2749 err:
2750 return retval;
2751 #else
2752 return -ENODEV;
2753 #endif
2754 }
2755
2756 static void __devexit mxser_remove(struct pci_dev *pdev)
2757 {
2758 struct mxser_board *brd = pci_get_drvdata(pdev);
2759 unsigned int i;
2760
2761 for (i = 0; i < brd->info->nports; i++)
2762 tty_unregister_device(mxvar_sdriver, brd->idx + i);
2763
2764 mxser_release_res(brd, pdev, 1);
2765 brd->info = NULL;
2766 }
2767
2768 static struct pci_driver mxser_driver = {
2769 .name = "mxser",
2770 .id_table = mxser_pcibrds,
2771 .probe = mxser_probe,
2772 .remove = __devexit_p(mxser_remove)
2773 };
2774
2775 static int __init mxser_module_init(void)
2776 {
2777 struct mxser_board *brd;
2778 unsigned int b, i, m;
2779 int retval;
2780
2781 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
2782 if (!mxvar_sdriver)
2783 return -ENOMEM;
2784
2785 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
2786 MXSER_VERSION);
2787
2788 /* Initialize the tty_driver structure */
2789 mxvar_sdriver->owner = THIS_MODULE;
2790 mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
2791 mxvar_sdriver->name = "ttyMI";
2792 mxvar_sdriver->major = ttymajor;
2793 mxvar_sdriver->minor_start = 0;
2794 mxvar_sdriver->num = MXSER_PORTS + 1;
2795 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
2796 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
2797 mxvar_sdriver->init_termios = tty_std_termios;
2798 mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
2799 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW|TTY_DRIVER_DYNAMIC_DEV;
2800 tty_set_operations(mxvar_sdriver, &mxser_ops);
2801
2802 retval = tty_register_driver(mxvar_sdriver);
2803 if (retval) {
2804 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family "
2805 "tty driver !\n");
2806 goto err_put;
2807 }
2808
2809 /* Start finding ISA boards here */
2810 for (m = 0, b = 0; b < MXSER_BOARDS; b++) {
2811 if (!ioaddr[b])
2812 continue;
2813
2814 brd = &mxser_boards[m];
2815 retval = mxser_get_ISA_conf(!ioaddr[b], brd);
2816 if (retval <= 0) {
2817 brd->info = NULL;
2818 continue;
2819 }
2820
2821 printk(KERN_INFO "mxser: found MOXA %s board (CAP=0x%lx)\n",
2822 brd->info->name, ioaddr[b]);
2823
2824 /* mxser_initbrd will hook ISR. */
2825 if (mxser_initbrd(brd, NULL) < 0) {
2826 brd->info = NULL;
2827 continue;
2828 }
2829
2830 brd->idx = m * MXSER_PORTS_PER_BOARD;
2831 for (i = 0; i < brd->info->nports; i++)
2832 tty_register_device(mxvar_sdriver, brd->idx + i, NULL);
2833
2834 m++;
2835 }
2836
2837 retval = pci_register_driver(&mxser_driver);
2838 if (retval) {
2839 printk(KERN_ERR "mxser: can't register pci driver\n");
2840 if (!m) {
2841 retval = -ENODEV;
2842 goto err_unr;
2843 } /* else: we have some ISA cards under control */
2844 }
2845
2846 return 0;
2847 err_unr:
2848 tty_unregister_driver(mxvar_sdriver);
2849 err_put:
2850 put_tty_driver(mxvar_sdriver);
2851 return retval;
2852 }
2853
2854 static void __exit mxser_module_exit(void)
2855 {
2856 unsigned int i, j;
2857
2858 pci_unregister_driver(&mxser_driver);
2859
2860 for (i = 0; i < MXSER_BOARDS; i++) /* ISA remains */
2861 if (mxser_boards[i].info != NULL)
2862 for (j = 0; j < mxser_boards[i].info->nports; j++)
2863 tty_unregister_device(mxvar_sdriver,
2864 mxser_boards[i].idx + j);
2865 tty_unregister_driver(mxvar_sdriver);
2866 put_tty_driver(mxvar_sdriver);
2867
2868 for (i = 0; i < MXSER_BOARDS; i++)
2869 if (mxser_boards[i].info != NULL)
2870 mxser_release_res(&mxser_boards[i], NULL, 1);
2871 }
2872
2873 module_init(mxser_module_init);
2874 module_exit(mxser_module_exit);
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree