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Linux 2.6.21.1
[linux/fpc-iii.git] / drivers / char / mxser.c
blob80a01150b86c40674d9f0158062b2e91bdbff676
1 /*
2 * mxser.c -- MOXA Smartio/Industio family multiport serial driver.
3 *
4 * Copyright (C) 1999-2001 Moxa Technologies (support@moxa.com.tw).
5 *
6 * This code is loosely based on the Linux serial driver, written by
7 * Linus Torvalds, Theodore T'so and others.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *
23 * Original release 10/26/00
24 *
25 * 02/06/01 Support MOXA Industio family boards.
26 * 02/06/01 Support TIOCGICOUNT.
27 * 02/06/01 Fix the problem for connecting to serial mouse.
28 * 02/06/01 Fix the problem for H/W flow control.
29 * 02/06/01 Fix the compling warning when CONFIG_PCI
30 * don't be defined.
31 *
32 * Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
33 * <alan@redhat.com>. The original 1.8 code is available on www.moxa.com.
34 * - Fixed x86_64 cleanness
35 * - Fixed sleep with spinlock held in mxser_send_break
36 */
37
38
39 #include <linux/module.h>
40 #include <linux/autoconf.h>
41 #include <linux/errno.h>
42 #include <linux/signal.h>
43 #include <linux/sched.h>
44 #include <linux/timer.h>
45 #include <linux/interrupt.h>
46 #include <linux/tty.h>
47 #include <linux/tty_flip.h>
48 #include <linux/serial.h>
49 #include <linux/serial_reg.h>
50 #include <linux/major.h>
51 #include <linux/string.h>
52 #include <linux/fcntl.h>
53 #include <linux/ptrace.h>
54 #include <linux/gfp.h>
55 #include <linux/ioport.h>
56 #include <linux/mm.h>
57 #include <linux/smp_lock.h>
58 #include <linux/delay.h>
59 #include <linux/pci.h>
60
61 #include <asm/system.h>
62 #include <asm/io.h>
63 #include <asm/irq.h>
64 #include <asm/bitops.h>
65 #include <asm/uaccess.h>
66
67 #include "mxser.h"
68
69 #define MXSER_VERSION "1.8"
70 #define MXSERMAJOR 174
71 #define MXSERCUMAJOR 175
72
73 #define MXSER_EVENT_TXLOW 1
74 #define MXSER_EVENT_HANGUP 2
75
76 #define MXSER_BOARDS 4 /* Max. boards */
77 #define MXSER_PORTS 32 /* Max. ports */
78 #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
79 #define MXSER_ISR_PASS_LIMIT 256
80
81 #define MXSER_ERR_IOADDR -1
82 #define MXSER_ERR_IRQ -2
83 #define MXSER_ERR_IRQ_CONFLIT -3
84 #define MXSER_ERR_VECTOR -4
85
86 #define SERIAL_TYPE_NORMAL 1
87 #define SERIAL_TYPE_CALLOUT 2
88
89 #define WAKEUP_CHARS 256
90
91 #define UART_MCR_AFE 0x20
92 #define UART_LSR_SPECIAL 0x1E
93
94 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|\
95 IXON|IXOFF))
96
97 #define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? IRQF_SHARED : IRQF_DISABLED)
98
99 #define C168_ASIC_ID 1
100 #define C104_ASIC_ID 2
101 #define C102_ASIC_ID 0xB
102 #define CI132_ASIC_ID 4
103 #define CI134_ASIC_ID 3
104 #define CI104J_ASIC_ID 5
105
106 enum {
107 MXSER_BOARD_C168_ISA = 1,
108 MXSER_BOARD_C104_ISA,
109 MXSER_BOARD_CI104J,
110 MXSER_BOARD_C168_PCI,
111 MXSER_BOARD_C104_PCI,
112 MXSER_BOARD_C102_ISA,
113 MXSER_BOARD_CI132,
114 MXSER_BOARD_CI134,
115 MXSER_BOARD_CP132,
116 MXSER_BOARD_CP114,
117 MXSER_BOARD_CT114,
118 MXSER_BOARD_CP102,
119 MXSER_BOARD_CP104U,
120 MXSER_BOARD_CP168U,
121 MXSER_BOARD_CP132U,
122 MXSER_BOARD_CP134U,
123 MXSER_BOARD_CP104JU,
124 MXSER_BOARD_RC7000,
125 MXSER_BOARD_CP118U,
126 MXSER_BOARD_CP102UL,
127 MXSER_BOARD_CP102U,
128 };
129
130 static char *mxser_brdname[] = {
131 "C168 series",
132 "C104 series",
133 "CI-104J series",
134 "C168H/PCI series",
135 "C104H/PCI series",
136 "C102 series",
137 "CI-132 series",
138 "CI-134 series",
139 "CP-132 series",
140 "CP-114 series",
141 "CT-114 series",
142 "CP-102 series",
143 "CP-104U series",
144 "CP-168U series",
145 "CP-132U series",
146 "CP-134U series",
147 "CP-104JU series",
148 "Moxa UC7000 Serial",
149 "CP-118U series",
150 "CP-102UL series",
151 "CP-102U series",
152 };
153
154 static int mxser_numports[] = {
155 8, /* C168-ISA */
156 4, /* C104-ISA */
157 4, /* CI104J */
158 8, /* C168-PCI */
159 4, /* C104-PCI */
160 2, /* C102-ISA */
161 2, /* CI132 */
162 4, /* CI134 */
163 2, /* CP132 */
164 4, /* CP114 */
165 4, /* CT114 */
166 2, /* CP102 */
167 4, /* CP104U */
168 8, /* CP168U */
169 2, /* CP132U */
170 4, /* CP134U */
171 4, /* CP104JU */
172 8, /* RC7000 */
173 8, /* CP118U */
174 2, /* CP102UL */
175 2, /* CP102U */
176 };
177
178 #define UART_TYPE_NUM 2
179
180 static const unsigned int Gmoxa_uart_id[UART_TYPE_NUM] = {
181 MOXA_MUST_MU150_HWID,
182 MOXA_MUST_MU860_HWID
183 };
184
185 /* This is only for PCI */
186 #define UART_INFO_NUM 3
187 struct mxpciuart_info {
188 int type;
189 int tx_fifo;
190 int rx_fifo;
191 int xmit_fifo_size;
192 int rx_high_water;
193 int rx_trigger;
194 int rx_low_water;
195 long max_baud;
196 };
197
198 static const struct mxpciuart_info Gpci_uart_info[UART_INFO_NUM] = {
199 {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
200 {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
201 {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
202 };
203
204
205 #ifdef CONFIG_PCI
206
207 static struct pci_device_id mxser_pcibrds[] = {
208 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C168_PCI},
209 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C104_PCI},
210 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132},
211 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP114},
212 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CT114},
213 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102},
214 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104U},
215 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP168U},
216 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132U},
217 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP134U},
218 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104JU},
219 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_RC7000},
220 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP118U},
221 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102UL},
222 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102U},
223 {0}
224 };
225
226 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
227
228
229 #endif
230
231 typedef struct _moxa_pci_info {
232 unsigned short busNum;
233 unsigned short devNum;
234 struct pci_dev *pdev; /* add by Victor Yu. 06-23-2003 */
235 } moxa_pci_info;
236
237 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
238 static int ttymajor = MXSERMAJOR;
239 static int calloutmajor = MXSERCUMAJOR;
240 static int verbose = 0;
241
242 /* Variables for insmod */
243
244 MODULE_AUTHOR("Casper Yang");
245 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
246 module_param_array(ioaddr, int, NULL, 0);
247 module_param(ttymajor, int, 0);
248 module_param(calloutmajor, int, 0);
249 module_param(verbose, bool, 0);
250 MODULE_LICENSE("GPL");
251
252 struct mxser_log {
253 int tick;
254 unsigned long rxcnt[MXSER_PORTS];
255 unsigned long txcnt[MXSER_PORTS];
256 };
257
258
259 struct mxser_mon {
260 unsigned long rxcnt;
261 unsigned long txcnt;
262 unsigned long up_rxcnt;
263 unsigned long up_txcnt;
264 int modem_status;
265 unsigned char hold_reason;
266 };
267
268 struct mxser_mon_ext {
269 unsigned long rx_cnt[32];
270 unsigned long tx_cnt[32];
271 unsigned long up_rxcnt[32];
272 unsigned long up_txcnt[32];
273 int modem_status[32];
274
275 long baudrate[32];
276 int databits[32];
277 int stopbits[32];
278 int parity[32];
279 int flowctrl[32];
280 int fifo[32];
281 int iftype[32];
282 };
283
284 struct mxser_hwconf {
285 int board_type;
286 int ports;
287 int irq;
288 int vector;
289 int vector_mask;
290 int uart_type;
291 int ioaddr[MXSER_PORTS_PER_BOARD];
292 int baud_base[MXSER_PORTS_PER_BOARD];
293 moxa_pci_info pciInfo;
294 int IsMoxaMustChipFlag; /* add by Victor Yu. 08-30-2002 */
295 int MaxCanSetBaudRate[MXSER_PORTS_PER_BOARD]; /* add by Victor Yu. 09-04-2002 */
296 int opmode_ioaddr[MXSER_PORTS_PER_BOARD]; /* add by Victor Yu. 01-05-2004 */
297 };
298
299 struct mxser_struct {
300 int port;
301 int base; /* port base address */
302 int irq; /* port using irq no. */
303 int vector; /* port irq vector */
304 int vectormask; /* port vector mask */
305 int rx_high_water;
306 int rx_trigger; /* Rx fifo trigger level */
307 int rx_low_water;
308 int baud_base; /* max. speed */
309 int flags; /* defined in tty.h */
310 int type; /* UART type */
311 struct tty_struct *tty;
312 int read_status_mask;
313 int ignore_status_mask;
314 int xmit_fifo_size;
315 int custom_divisor;
316 int x_char; /* xon/xoff character */
317 int close_delay;
318 unsigned short closing_wait;
319 int IER; /* Interrupt Enable Register */
320 int MCR; /* Modem control register */
321 unsigned long event;
322 int count; /* # of fd on device */
323 int blocked_open; /* # of blocked opens */
324 unsigned char *xmit_buf;
325 int xmit_head;
326 int xmit_tail;
327 int xmit_cnt;
328 struct work_struct tqueue;
329 struct ktermios normal_termios;
330 struct ktermios callout_termios;
331 wait_queue_head_t open_wait;
332 wait_queue_head_t close_wait;
333 wait_queue_head_t delta_msr_wait;
334 struct async_icount icount; /* kernel counters for the 4 input interrupts */
335 int timeout;
336 int IsMoxaMustChipFlag; /* add by Victor Yu. 08-30-2002 */
337 int MaxCanSetBaudRate; /* add by Victor Yu. 09-04-2002 */
338 int opmode_ioaddr; /* add by Victor Yu. 01-05-2004 */
339 unsigned char stop_rx;
340 unsigned char ldisc_stop_rx;
341 long realbaud;
342 struct mxser_mon mon_data;
343 unsigned char err_shadow;
344 spinlock_t slock;
345 };
346
347 struct mxser_mstatus {
348 tcflag_t cflag;
349 int cts;
350 int dsr;
351 int ri;
352 int dcd;
353 };
354
355 static struct mxser_mstatus GMStatus[MXSER_PORTS];
356
357 static int mxserBoardCAP[MXSER_BOARDS] = {
358 0, 0, 0, 0
359 /* 0x180, 0x280, 0x200, 0x320 */
360 };
361
362 static struct tty_driver *mxvar_sdriver;
363 static struct mxser_struct mxvar_table[MXSER_PORTS];
364 static struct tty_struct *mxvar_tty[MXSER_PORTS + 1];
365 static struct ktermios *mxvar_termios[MXSER_PORTS + 1];
366 static struct ktermios *mxvar_termios_locked[MXSER_PORTS + 1];
367 static struct mxser_log mxvar_log;
368 static int mxvar_diagflag;
369 static unsigned char mxser_msr[MXSER_PORTS + 1];
370 static struct mxser_mon_ext mon_data_ext;
371 static int mxser_set_baud_method[MXSER_PORTS + 1];
372 static spinlock_t gm_lock;
373
374 /*
375 * This is used to figure out the divisor speeds and the timeouts
376 */
377
378 static struct mxser_hwconf mxsercfg[MXSER_BOARDS];
379
380 /*
381 * static functions:
382 */
383
384 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf);
385 static int mxser_init(void);
386
387 /* static void mxser_poll(unsigned long); */
388 static int mxser_get_ISA_conf(int, struct mxser_hwconf *);
389 static int mxser_get_PCI_conf(int, int, int, struct mxser_hwconf *);
390 static void mxser_do_softint(struct work_struct *);
391 static int mxser_open(struct tty_struct *, struct file *);
392 static void mxser_close(struct tty_struct *, struct file *);
393 static int mxser_write(struct tty_struct *, const unsigned char *, int);
394 static int mxser_write_room(struct tty_struct *);
395 static void mxser_flush_buffer(struct tty_struct *);
396 static int mxser_chars_in_buffer(struct tty_struct *);
397 static void mxser_flush_chars(struct tty_struct *);
398 static void mxser_put_char(struct tty_struct *, unsigned char);
399 static int mxser_ioctl(struct tty_struct *, struct file *, uint, ulong);
400 static int mxser_ioctl_special(unsigned int, void __user *);
401 static void mxser_throttle(struct tty_struct *);
402 static void mxser_unthrottle(struct tty_struct *);
403 static void mxser_set_termios(struct tty_struct *, struct ktermios *);
404 static void mxser_stop(struct tty_struct *);
405 static void mxser_start(struct tty_struct *);
406 static void mxser_hangup(struct tty_struct *);
407 static void mxser_rs_break(struct tty_struct *, int);
408 static irqreturn_t mxser_interrupt(int, void *);
409 static void mxser_receive_chars(struct mxser_struct *, int *);
410 static void mxser_transmit_chars(struct mxser_struct *);
411 static void mxser_check_modem_status(struct mxser_struct *, int);
412 static int mxser_block_til_ready(struct tty_struct *, struct file *, struct mxser_struct *);
413 static int mxser_startup(struct mxser_struct *);
414 static void mxser_shutdown(struct mxser_struct *);
415 static int mxser_change_speed(struct mxser_struct *, struct ktermios *old_termios);
416 static int mxser_get_serial_info(struct mxser_struct *, struct serial_struct __user *);
417 static int mxser_set_serial_info(struct mxser_struct *, struct serial_struct __user *);
418 static int mxser_get_lsr_info(struct mxser_struct *, unsigned int __user *);
419 static void mxser_send_break(struct mxser_struct *, int);
420 static int mxser_tiocmget(struct tty_struct *, struct file *);
421 static int mxser_tiocmset(struct tty_struct *, struct file *, unsigned int, unsigned int);
422 static int mxser_set_baud(struct mxser_struct *info, long newspd);
423 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout);
424
425 static void mxser_startrx(struct tty_struct *tty);
426 static void mxser_stoprx(struct tty_struct *tty);
427
428
429 static int CheckIsMoxaMust(int io)
430 {
431 u8 oldmcr, hwid;
432 int i;
433
434 outb(0, io + UART_LCR);
435 DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
436 oldmcr = inb(io + UART_MCR);
437 outb(0, io + UART_MCR);
438 SET_MOXA_MUST_XON1_VALUE(io, 0x11);
439 if ((hwid = inb(io + UART_MCR)) != 0) {
440 outb(oldmcr, io + UART_MCR);
441 return MOXA_OTHER_UART;
442 }
443
444 GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
445 for (i = 0; i < UART_TYPE_NUM; i++) {
446 if (hwid == Gmoxa_uart_id[i])
447 return (int)hwid;
448 }
449 return MOXA_OTHER_UART;
450 }
451
452 /* above is modified by Victor Yu. 08-15-2002 */
453
454 static const struct tty_operations mxser_ops = {
455 .open = mxser_open,
456 .close = mxser_close,
457 .write = mxser_write,
458 .put_char = mxser_put_char,
459 .flush_chars = mxser_flush_chars,
460 .write_room = mxser_write_room,
461 .chars_in_buffer = mxser_chars_in_buffer,
462 .flush_buffer = mxser_flush_buffer,
463 .ioctl = mxser_ioctl,
464 .throttle = mxser_throttle,
465 .unthrottle = mxser_unthrottle,
466 .set_termios = mxser_set_termios,
467 .stop = mxser_stop,
468 .start = mxser_start,
469 .hangup = mxser_hangup,
470 .break_ctl = mxser_rs_break,
471 .wait_until_sent = mxser_wait_until_sent,
472 .tiocmget = mxser_tiocmget,
473 .tiocmset = mxser_tiocmset,
474 };
475
476 /*
477 * The MOXA Smartio/Industio serial driver boot-time initialization code!
478 */
479
480 static int __init mxser_module_init(void)
481 {
482 int ret;
483
484 if (verbose)
485 printk(KERN_DEBUG "Loading module mxser ...\n");
486 ret = mxser_init();
487 if (verbose)
488 printk(KERN_DEBUG "Done.\n");
489 return ret;
490 }
491
492 static void __exit mxser_module_exit(void)
493 {
494 int i, err;
495
496 if (verbose)
497 printk(KERN_DEBUG "Unloading module mxser ...\n");
498
499 err = tty_unregister_driver(mxvar_sdriver);
500 if (!err)
501 put_tty_driver(mxvar_sdriver);
502 else
503 printk(KERN_ERR "Couldn't unregister MOXA Smartio/Industio family serial driver\n");
504
505 for (i = 0; i < MXSER_BOARDS; i++) {
506 struct pci_dev *pdev;
507
508 if (mxsercfg[i].board_type == -1)
509 continue;
510 else {
511 pdev = mxsercfg[i].pciInfo.pdev;
512 free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
513 if (pdev != NULL) { /* PCI */
514 release_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2));
515 release_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3));
516 pci_dev_put(pdev);
517 } else {
518 release_region(mxsercfg[i].ioaddr[0], 8 * mxsercfg[i].ports);
519 release_region(mxsercfg[i].vector, 1);
520 }
521 }
522 }
523 if (verbose)
524 printk(KERN_DEBUG "Done.\n");
525 }
526
527 static void process_txrx_fifo(struct mxser_struct *info)
528 {
529 int i;
530
531 if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
532 info->rx_trigger = 1;
533 info->rx_high_water = 1;
534 info->rx_low_water = 1;
535 info->xmit_fifo_size = 1;
536 } else {
537 for (i = 0; i < UART_INFO_NUM; i++) {
538 if (info->IsMoxaMustChipFlag == Gpci_uart_info[i].type) {
539 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
540 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
541 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
542 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
543 break;
544 }
545 }
546 }
547 }
548
549 static int mxser_initbrd(int board, struct mxser_hwconf *hwconf)
550 {
551 struct mxser_struct *info;
552 int retval;
553 int i, n;
554
555 n = board * MXSER_PORTS_PER_BOARD;
556 info = &mxvar_table[n];
557 /*if (verbose) */ {
558 printk(KERN_DEBUG " ttyMI%d - ttyMI%d ",
559 n, n + hwconf->ports - 1);
560 printk(" max. baud rate = %d bps.\n",
561 hwconf->MaxCanSetBaudRate[0]);
562 }
563
564 for (i = 0; i < hwconf->ports; i++, n++, info++) {
565 info->port = n;
566 info->base = hwconf->ioaddr[i];
567 info->irq = hwconf->irq;
568 info->vector = hwconf->vector;
569 info->vectormask = hwconf->vector_mask;
570 info->opmode_ioaddr = hwconf->opmode_ioaddr[i]; /* add by Victor Yu. 01-05-2004 */
571 info->stop_rx = 0;
572 info->ldisc_stop_rx = 0;
573
574 info->IsMoxaMustChipFlag = hwconf->IsMoxaMustChipFlag;
575 /* Enhance mode enabled here */
576 if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
577 ENABLE_MOXA_MUST_ENCHANCE_MODE(info->base);
578 }
579
580 info->flags = ASYNC_SHARE_IRQ;
581 info->type = hwconf->uart_type;
582 info->baud_base = hwconf->baud_base[i];
583
584 info->MaxCanSetBaudRate = hwconf->MaxCanSetBaudRate[i];
585
586 process_txrx_fifo(info);
587
588
589 info->custom_divisor = hwconf->baud_base[i] * 16;
590 info->close_delay = 5 * HZ / 10;
591 info->closing_wait = 30 * HZ;
592 INIT_WORK(&info->tqueue, mxser_do_softint);
593 info->normal_termios = mxvar_sdriver->init_termios;
594 init_waitqueue_head(&info->open_wait);
595 init_waitqueue_head(&info->close_wait);
596 init_waitqueue_head(&info->delta_msr_wait);
597 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
598 info->err_shadow = 0;
599 spin_lock_init(&info->slock);
600 }
601 /*
602 * Allocate the IRQ if necessary
603 */
604
605
606 /* before set INT ISR, disable all int */
607 for (i = 0; i < hwconf->ports; i++) {
608 outb(inb(hwconf->ioaddr[i] + UART_IER) & 0xf0,
609 hwconf->ioaddr[i] + UART_IER);
610 }
611
612 n = board * MXSER_PORTS_PER_BOARD;
613 info = &mxvar_table[n];
614
615 retval = request_irq(hwconf->irq, mxser_interrupt, IRQ_T(info),
616 "mxser", info);
617 if (retval) {
618 printk(KERN_ERR "Board %d: %s",
619 board, mxser_brdname[hwconf->board_type - 1]);
620 printk(" Request irq failed, IRQ (%d) may conflict with"
621 " another device.\n", info->irq);
622 return retval;
623 }
624 return 0;
625 }
626
627 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf)
628 {
629 mxsercfg[board] = *hwconf;
630 }
631
632 #ifdef CONFIG_PCI
633 static int mxser_get_PCI_conf(int busnum, int devnum, int board_type, struct mxser_hwconf *hwconf)
634 {
635 int i, j;
636 /* unsigned int val; */
637 unsigned int ioaddress;
638 struct pci_dev *pdev = hwconf->pciInfo.pdev;
639
640 /* io address */
641 hwconf->board_type = board_type;
642 hwconf->ports = mxser_numports[board_type - 1];
643 ioaddress = pci_resource_start(pdev, 2);
644 request_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2),
645 "mxser(IO)");
646
647 for (i = 0; i < hwconf->ports; i++)
648 hwconf->ioaddr[i] = ioaddress + 8 * i;
649
650 /* vector */
651 ioaddress = pci_resource_start(pdev, 3);
652 request_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3),
653 "mxser(vector)");
654 hwconf->vector = ioaddress;
655
656 /* irq */
657 hwconf->irq = hwconf->pciInfo.pdev->irq;
658
659 hwconf->IsMoxaMustChipFlag = CheckIsMoxaMust(hwconf->ioaddr[0]);
660 hwconf->uart_type = PORT_16550A;
661 hwconf->vector_mask = 0;
662
663
664 for (i = 0; i < hwconf->ports; i++) {
665 for (j = 0; j < UART_INFO_NUM; j++) {
666 if (Gpci_uart_info[j].type == hwconf->IsMoxaMustChipFlag) {
667 hwconf->MaxCanSetBaudRate[i] = Gpci_uart_info[j].max_baud;
668
669 /* exception....CP-102 */
670 if (board_type == MXSER_BOARD_CP102)
671 hwconf->MaxCanSetBaudRate[i] = 921600;
672 break;
673 }
674 }
675 }
676
677 if (hwconf->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID) {
678 for (i = 0; i < hwconf->ports; i++) {
679 if (i < 4)
680 hwconf->opmode_ioaddr[i] = ioaddress + 4;
681 else
682 hwconf->opmode_ioaddr[i] = ioaddress + 0x0c;
683 }
684 outb(0, ioaddress + 4); /* default set to RS232 mode */
685 outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
686 }
687
688 for (i = 0; i < hwconf->ports; i++) {
689 hwconf->vector_mask |= (1 << i);
690 hwconf->baud_base[i] = 921600;
691 }
692 return 0;
693 }
694 #endif
695
696 static int mxser_init(void)
697 {
698 int i, m, retval, b, n;
699 struct pci_dev *pdev = NULL;
700 int index;
701 unsigned char busnum, devnum;
702 struct mxser_hwconf hwconf;
703
704 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
705 if (!mxvar_sdriver)
706 return -ENOMEM;
707 spin_lock_init(&gm_lock);
708
709 for (i = 0; i < MXSER_BOARDS; i++) {
710 mxsercfg[i].board_type = -1;
711 }
712
713 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
714 MXSER_VERSION);
715
716 /* Initialize the tty_driver structure */
717 memset(mxvar_sdriver, 0, sizeof(struct tty_driver));
718 mxvar_sdriver->owner = THIS_MODULE;
719 mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
720 mxvar_sdriver->name = "ttyMI";
721 mxvar_sdriver->major = ttymajor;
722 mxvar_sdriver->minor_start = 0;
723 mxvar_sdriver->num = MXSER_PORTS + 1;
724 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
725 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
726 mxvar_sdriver->init_termios = tty_std_termios;
727 mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
728 mxvar_sdriver->init_termios.c_ispeed = 9600;
729 mxvar_sdriver->init_termios.c_ospeed = 9600;
730 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW;
731 tty_set_operations(mxvar_sdriver, &mxser_ops);
732 mxvar_sdriver->ttys = mxvar_tty;
733 mxvar_sdriver->termios = mxvar_termios;
734 mxvar_sdriver->termios_locked = mxvar_termios_locked;
735
736 mxvar_diagflag = 0;
737 memset(mxvar_table, 0, MXSER_PORTS * sizeof(struct mxser_struct));
738 memset(&mxvar_log, 0, sizeof(struct mxser_log));
739
740 memset(&mxser_msr, 0, sizeof(unsigned char) * (MXSER_PORTS + 1));
741 memset(&mon_data_ext, 0, sizeof(struct mxser_mon_ext));
742 memset(&mxser_set_baud_method, 0, sizeof(int) * (MXSER_PORTS + 1));
743 memset(&hwconf, 0, sizeof(struct mxser_hwconf));
744
745 m = 0;
746 /* Start finding ISA boards here */
747 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
748 int cap;
749
750 if (!(cap = mxserBoardCAP[b]))
751 continue;
752
753 retval = mxser_get_ISA_conf(cap, &hwconf);
754
755 if (retval != 0)
756 printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
757 mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
758
759 if (retval <= 0) {
760 if (retval == MXSER_ERR_IRQ)
761 printk(KERN_ERR "Invalid interrupt number, "
762 "board not configured\n");
763 else if (retval == MXSER_ERR_IRQ_CONFLIT)
764 printk(KERN_ERR "Invalid interrupt number, "
765 "board not configured\n");
766 else if (retval == MXSER_ERR_VECTOR)
767 printk(KERN_ERR "Invalid interrupt vector, "
768 "board not configured\n");
769 else if (retval == MXSER_ERR_IOADDR)
770 printk(KERN_ERR "Invalid I/O address, "
771 "board not configured\n");
772
773 continue;
774 }
775
776 hwconf.pciInfo.busNum = 0;
777 hwconf.pciInfo.devNum = 0;
778 hwconf.pciInfo.pdev = NULL;
779
780 mxser_getcfg(m, &hwconf);
781 /*
782 * init mxsercfg first,
783 * or mxsercfg data is not correct on ISR.
784 */
785 /* mxser_initbrd will hook ISR. */
786 if (mxser_initbrd(m, &hwconf) < 0)
787 continue;
788
789 m++;
790 }
791
792 /* Start finding ISA boards from module arg */
793 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
794 int cap;
795
796 if (!(cap = ioaddr[b]))
797 continue;
798
799 retval = mxser_get_ISA_conf(cap, &hwconf);
800
801 if (retval != 0)
802 printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
803 mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
804
805 if (retval <= 0) {
806 if (retval == MXSER_ERR_IRQ)
807 printk(KERN_ERR "Invalid interrupt number, "
808 "board not configured\n");
809 else if (retval == MXSER_ERR_IRQ_CONFLIT)
810 printk(KERN_ERR "Invalid interrupt number, "
811 "board not configured\n");
812 else if (retval == MXSER_ERR_VECTOR)
813 printk(KERN_ERR "Invalid interrupt vector, "
814 "board not configured\n");
815 else if (retval == MXSER_ERR_IOADDR)
816 printk(KERN_ERR "Invalid I/O address, "
817 "board not configured\n");
818
819 continue;
820 }
821
822 hwconf.pciInfo.busNum = 0;
823 hwconf.pciInfo.devNum = 0;
824 hwconf.pciInfo.pdev = NULL;
825
826 mxser_getcfg(m, &hwconf);
827 /*
828 * init mxsercfg first,
829 * or mxsercfg data is not correct on ISR.
830 */
831 /* mxser_initbrd will hook ISR. */
832 if (mxser_initbrd(m, &hwconf) < 0)
833 continue;
834
835 m++;
836 }
837
838 /* start finding PCI board here */
839 #ifdef CONFIG_PCI
840 n = ARRAY_SIZE(mxser_pcibrds) - 1;
841 index = 0;
842 b = 0;
843 while (b < n) {
844 pdev = pci_get_device(mxser_pcibrds[b].vendor,
845 mxser_pcibrds[b].device, pdev);
846 if (pdev == NULL) {
847 b++;
848 continue;
849 }
850 hwconf.pciInfo.busNum = busnum = pdev->bus->number;
851 hwconf.pciInfo.devNum = devnum = PCI_SLOT(pdev->devfn) << 3;
852 hwconf.pciInfo.pdev = pdev;
853 printk(KERN_INFO "Found MOXA %s board(BusNo=%d,DevNo=%d)\n",
854 mxser_brdname[(int) (mxser_pcibrds[b].driver_data) - 1],
855 busnum, devnum >> 3);
856 index++;
857 if (m >= MXSER_BOARDS)
858 printk(KERN_ERR
859 "Too many Smartio/Industio family boards find "
860 "(maximum %d), board not configured\n",
861 MXSER_BOARDS);
862 else {
863 if (pci_enable_device(pdev)) {
864 printk(KERN_ERR "Moxa SmartI/O PCI enable "
865 "fail !\n");
866 continue;
867 }
868 retval = mxser_get_PCI_conf(busnum, devnum,
869 (int)mxser_pcibrds[b].driver_data,
870 &hwconf);
871 if (retval < 0) {
872 if (retval == MXSER_ERR_IRQ)
873 printk(KERN_ERR
874 "Invalid interrupt number, "
875 "board not configured\n");
876 else if (retval == MXSER_ERR_IRQ_CONFLIT)
877 printk(KERN_ERR
878 "Invalid interrupt number, "
879 "board not configured\n");
880 else if (retval == MXSER_ERR_VECTOR)
881 printk(KERN_ERR
882 "Invalid interrupt vector, "
883 "board not configured\n");
884 else if (retval == MXSER_ERR_IOADDR)
885 printk(KERN_ERR
886 "Invalid I/O address, "
887 "board not configured\n");
888 continue;
889 }
890 mxser_getcfg(m, &hwconf);
891 /* init mxsercfg first,
892 * or mxsercfg data is not correct on ISR.
893 */
894 /* mxser_initbrd will hook ISR. */
895 if (mxser_initbrd(m, &hwconf) < 0)
896 continue;
897 m++;
898 /* Keep an extra reference if we succeeded. It will
899 be returned at unload time */
900 pci_dev_get(pdev);
901 }
902 }
903 #endif
904
905 retval = tty_register_driver(mxvar_sdriver);
906 if (retval) {
907 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family"
908 " driver !\n");
909 put_tty_driver(mxvar_sdriver);
910
911 for (i = 0; i < MXSER_BOARDS; i++) {
912 if (mxsercfg[i].board_type == -1)
913 continue;
914 else {
915 free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
916 /* todo: release io, vector */
917 }
918 }
919 return retval;
920 }
921
922 return 0;
923 }
924
925 static void mxser_do_softint(struct work_struct *work)
926 {
927 struct mxser_struct *info =
928 container_of(work, struct mxser_struct, tqueue);
929 struct tty_struct *tty;
930
931 tty = info->tty;
932
933 if (tty) {
934 if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
935 tty_wakeup(tty);
936 if (test_and_clear_bit(MXSER_EVENT_HANGUP, &info->event))
937 tty_hangup(tty);
938 }
939 }
940
941 static unsigned char mxser_get_msr(int baseaddr, int mode, int port, struct mxser_struct *info)
942 {
943 unsigned char status = 0;
944
945 status = inb(baseaddr + UART_MSR);
946
947 mxser_msr[port] &= 0x0F;
948 mxser_msr[port] |= status;
949 status = mxser_msr[port];
950 if (mode)
951 mxser_msr[port] = 0;
952
953 return status;
954 }
955
956 /*
957 * This routine is called whenever a serial port is opened. It
958 * enables interrupts for a serial port, linking in its async structure into
959 * the IRQ chain. It also performs the serial-specific
960 * initialization for the tty structure.
961 */
962 static int mxser_open(struct tty_struct *tty, struct file *filp)
963 {
964 struct mxser_struct *info;
965 int retval, line;
966
967 /* initialize driver_data in case something fails */
968 tty->driver_data = NULL;
969
970 line = tty->index;
971 if (line == MXSER_PORTS)
972 return 0;
973 if (line < 0 || line > MXSER_PORTS)
974 return -ENODEV;
975 info = mxvar_table + line;
976 if (!info->base)
977 return -ENODEV;
978
979 tty->driver_data = info;
980 info->tty = tty;
981 /*
982 * Start up serial port
983 */
984 retval = mxser_startup(info);
985 if (retval)
986 return retval;
987
988 retval = mxser_block_til_ready(tty, filp, info);
989 if (retval)
990 return retval;
991
992 info->count++;
993
994 if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
995 if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
996 *tty->termios = info->normal_termios;
997 else
998 *tty->termios = info->callout_termios;
999 mxser_change_speed(info, NULL);
1000 }
1001
1002 /*
1003 status = mxser_get_msr(info->base, 0, info->port);
1004 mxser_check_modem_status(info, status);
1005 */
1006
1007 /* unmark here for very high baud rate (ex. 921600 bps) used */
1008 tty->low_latency = 1;
1009 return 0;
1010 }
1011
1012 /*
1013 * This routine is called when the serial port gets closed. First, we
1014 * wait for the last remaining data to be sent. Then, we unlink its
1015 * async structure from the interrupt chain if necessary, and we free
1016 * that IRQ if nothing is left in the chain.
1017 */
1018 static void mxser_close(struct tty_struct *tty, struct file *filp)
1019 {
1020 struct mxser_struct *info = tty->driver_data;
1021
1022 unsigned long timeout;
1023 unsigned long flags;
1024 struct tty_ldisc *ld;
1025
1026 if (tty->index == MXSER_PORTS)
1027 return;
1028 if (!info)
1029 return;
1030
1031 spin_lock_irqsave(&info->slock, flags);
1032
1033 if (tty_hung_up_p(filp)) {
1034 spin_unlock_irqrestore(&info->slock, flags);
1035 return;
1036 }
1037 if ((tty->count == 1) && (info->count != 1)) {
1038 /*
1039 * Uh, oh. tty->count is 1, which means that the tty
1040 * structure will be freed. Info->count should always
1041 * be one in these conditions. If it's greater than
1042 * one, we've got real problems, since it means the
1043 * serial port won't be shutdown.
1044 */
1045 printk(KERN_ERR "mxser_close: bad serial port count; "
1046 "tty->count is 1, info->count is %d\n", info->count);
1047 info->count = 1;
1048 }
1049 if (--info->count < 0) {
1050 printk(KERN_ERR "mxser_close: bad serial port count for "
1051 "ttys%d: %d\n", info->port, info->count);
1052 info->count = 0;
1053 }
1054 if (info->count) {
1055 spin_unlock_irqrestore(&info->slock, flags);
1056 return;
1057 }
1058 info->flags |= ASYNC_CLOSING;
1059 spin_unlock_irqrestore(&info->slock, flags);
1060 /*
1061 * Save the termios structure, since this port may have
1062 * separate termios for callout and dialin.
1063 */
1064 if (info->flags & ASYNC_NORMAL_ACTIVE)
1065 info->normal_termios = *tty->termios;
1066 /*
1067 * Now we wait for the transmit buffer to clear; and we notify
1068 * the line discipline to only process XON/XOFF characters.
1069 */
1070 tty->closing = 1;
1071 if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1072 tty_wait_until_sent(tty, info->closing_wait);
1073 /*
1074 * At this point we stop accepting input. To do this, we
1075 * disable the receive line status interrupts, and tell the
1076 * interrupt driver to stop checking the data ready bit in the
1077 * line status register.
1078 */
1079 info->IER &= ~UART_IER_RLSI;
1080 if (info->IsMoxaMustChipFlag)
1081 info->IER &= ~MOXA_MUST_RECV_ISR;
1082 /* by William
1083 info->read_status_mask &= ~UART_LSR_DR;
1084 */
1085 if (info->flags & ASYNC_INITIALIZED) {
1086 outb(info->IER, info->base + UART_IER);
1087 /*
1088 * Before we drop DTR, make sure the UART transmitter
1089 * has completely drained; this is especially
1090 * important if there is a transmit FIFO!
1091 */
1092 timeout = jiffies + HZ;
1093 while (!(inb(info->base + UART_LSR) & UART_LSR_TEMT)) {
1094 schedule_timeout_interruptible(5);
1095 if (time_after(jiffies, timeout))
1096 break;
1097 }
1098 }
1099 mxser_shutdown(info);
1100
1101 if (tty->driver->flush_buffer)
1102 tty->driver->flush_buffer(tty);
1103
1104 ld = tty_ldisc_ref(tty);
1105 if (ld) {
1106 if (ld->flush_buffer)
1107 ld->flush_buffer(tty);
1108 tty_ldisc_deref(ld);
1109 }
1110
1111 tty->closing = 0;
1112 info->event = 0;
1113 info->tty = NULL;
1114 if (info->blocked_open) {
1115 if (info->close_delay)
1116 schedule_timeout_interruptible(info->close_delay);
1117 wake_up_interruptible(&info->open_wait);
1118 }
1119
1120 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1121 wake_up_interruptible(&info->close_wait);
1122
1123 }
1124
1125 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1126 {
1127 int c, total = 0;
1128 struct mxser_struct *info = tty->driver_data;
1129 unsigned long flags;
1130
1131 if (!info->xmit_buf)
1132 return 0;
1133
1134 while (1) {
1135 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1136 SERIAL_XMIT_SIZE - info->xmit_head));
1137 if (c <= 0)
1138 break;
1139
1140 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1141 spin_lock_irqsave(&info->slock, flags);
1142 info->xmit_head = (info->xmit_head + c) &
1143 (SERIAL_XMIT_SIZE - 1);
1144 info->xmit_cnt += c;
1145 spin_unlock_irqrestore(&info->slock, flags);
1146
1147 buf += c;
1148 count -= c;
1149 total += c;
1150 }
1151
1152 if (info->xmit_cnt && !tty->stopped && !(info->IER & UART_IER_THRI)) {
1153 if (!tty->hw_stopped ||
1154 (info->type == PORT_16550A) ||
1155 (info->IsMoxaMustChipFlag)) {
1156 spin_lock_irqsave(&info->slock, flags);
1157 info->IER |= UART_IER_THRI;
1158 outb(info->IER, info->base + UART_IER);
1159 spin_unlock_irqrestore(&info->slock, flags);
1160 }
1161 }
1162 return total;
1163 }
1164
1165 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1166 {
1167 struct mxser_struct *info = tty->driver_data;
1168 unsigned long flags;
1169
1170 if (!info->xmit_buf)
1171 return;
1172
1173 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1174 return;
1175
1176 spin_lock_irqsave(&info->slock, flags);
1177 info->xmit_buf[info->xmit_head++] = ch;
1178 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1179 info->xmit_cnt++;
1180 spin_unlock_irqrestore(&info->slock, flags);
1181 if (!tty->stopped && !(info->IER & UART_IER_THRI)) {
1182 if (!tty->hw_stopped ||
1183 (info->type == PORT_16550A) ||
1184 info->IsMoxaMustChipFlag) {
1185 spin_lock_irqsave(&info->slock, flags);
1186 info->IER |= UART_IER_THRI;
1187 outb(info->IER, info->base + UART_IER);
1188 spin_unlock_irqrestore(&info->slock, flags);
1189 }
1190 }
1191 }
1192
1193
1194 static void mxser_flush_chars(struct tty_struct *tty)
1195 {
1196 struct mxser_struct *info = tty->driver_data;
1197 unsigned long flags;
1198
1199 if (info->xmit_cnt <= 0 ||
1200 tty->stopped ||
1201 !info->xmit_buf ||
1202 (tty->hw_stopped &&
1203 (info->type != PORT_16550A) &&
1204 (!info->IsMoxaMustChipFlag)
1205 ))
1206 return;
1207
1208 spin_lock_irqsave(&info->slock, flags);
1209
1210 info->IER |= UART_IER_THRI;
1211 outb(info->IER, info->base + UART_IER);
1212
1213 spin_unlock_irqrestore(&info->slock, flags);
1214 }
1215
1216 static int mxser_write_room(struct tty_struct *tty)
1217 {
1218 struct mxser_struct *info = tty->driver_data;
1219 int ret;
1220
1221 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1222 if (ret < 0)
1223 ret = 0;
1224 return ret;
1225 }
1226
1227 static int mxser_chars_in_buffer(struct tty_struct *tty)
1228 {
1229 struct mxser_struct *info = tty->driver_data;
1230 return info->xmit_cnt;
1231 }
1232
1233 static void mxser_flush_buffer(struct tty_struct *tty)
1234 {
1235 struct mxser_struct *info = tty->driver_data;
1236 char fcr;
1237 unsigned long flags;
1238
1239
1240 spin_lock_irqsave(&info->slock, flags);
1241 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1242
1243 /* below added by shinhay */
1244 fcr = inb(info->base + UART_FCR);
1245 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1246 info->base + UART_FCR);
1247 outb(fcr, info->base + UART_FCR);
1248
1249 spin_unlock_irqrestore(&info->slock, flags);
1250 /* above added by shinhay */
1251
1252 tty_wakeup(tty);
1253 }
1254
1255 static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1256 {
1257 struct mxser_struct *info = tty->driver_data;
1258 int retval;
1259 struct async_icount cprev, cnow; /* kernel counter temps */
1260 struct serial_icounter_struct __user *p_cuser;
1261 unsigned long templ;
1262 unsigned long flags;
1263 void __user *argp = (void __user *)arg;
1264
1265 if (tty->index == MXSER_PORTS)
1266 return mxser_ioctl_special(cmd, argp);
1267
1268 /* following add by Victor Yu. 01-05-2004 */
1269 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1270 int opmode, p;
1271 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1272 int shiftbit;
1273 unsigned char val, mask;
1274
1275 p = info->port % 4;
1276 if (cmd == MOXA_SET_OP_MODE) {
1277 if (get_user(opmode, (int __user *) argp))
1278 return -EFAULT;
1279 if (opmode != RS232_MODE &&
1280 opmode != RS485_2WIRE_MODE &&
1281 opmode != RS422_MODE &&
1282 opmode != RS485_4WIRE_MODE)
1283 return -EFAULT;
1284 mask = ModeMask[p];
1285 shiftbit = p * 2;
1286 val = inb(info->opmode_ioaddr);
1287 val &= mask;
1288 val |= (opmode << shiftbit);
1289 outb(val, info->opmode_ioaddr);
1290 } else {
1291 shiftbit = p * 2;
1292 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1293 opmode &= OP_MODE_MASK;
1294 if (copy_to_user(argp, &opmode, sizeof(int)))
1295 return -EFAULT;
1296 }
1297 return 0;
1298 }
1299 /* above add by Victor Yu. 01-05-2004 */
1300
1301 if ((cmd != TIOCGSERIAL) && (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1302 if (tty->flags & (1 << TTY_IO_ERROR))
1303 return -EIO;
1304 }
1305 switch (cmd) {
1306 case TCSBRK: /* SVID version: non-zero arg --> no break */
1307 retval = tty_check_change(tty);
1308 if (retval)
1309 return retval;
1310 tty_wait_until_sent(tty, 0);
1311 if (!arg)
1312 mxser_send_break(info, HZ / 4); /* 1/4 second */
1313 return 0;
1314 case TCSBRKP: /* support for POSIX tcsendbreak() */
1315 retval = tty_check_change(tty);
1316 if (retval)
1317 return retval;
1318 tty_wait_until_sent(tty, 0);
1319 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1320 return 0;
1321 case TIOCGSOFTCAR:
1322 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
1323 case TIOCSSOFTCAR:
1324 if (get_user(templ, (unsigned long __user *) argp))
1325 return -EFAULT;
1326 arg = templ;
1327 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1328 return 0;
1329 case TIOCGSERIAL:
1330 return mxser_get_serial_info(info, argp);
1331 case TIOCSSERIAL:
1332 return mxser_set_serial_info(info, argp);
1333 case TIOCSERGETLSR: /* Get line status register */
1334 return mxser_get_lsr_info(info, argp);
1335 /*
1336 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1337 * - mask passed in arg for lines of interest
1338 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1339 * Caller should use TIOCGICOUNT to see which one it was
1340 */
1341 case TIOCMIWAIT:
1342 spin_lock_irqsave(&info->slock, flags);
1343 cnow = info->icount; /* note the counters on entry */
1344 spin_unlock_irqrestore(&info->slock, flags);
1345
1346 wait_event_interruptible(info->delta_msr_wait, ({
1347 cprev = cnow;
1348 spin_lock_irqsave(&info->slock, flags);
1349 cnow = info->icount; /* atomic copy */
1350 spin_unlock_irqrestore(&info->slock, flags);
1351
1352 ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1353 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1354 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
1355 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
1356 }));
1357 break;
1358 /*
1359 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1360 * Return: write counters to the user passed counter struct
1361 * NB: both 1->0 and 0->1 transitions are counted except for
1362 * RI where only 0->1 is counted.
1363 */
1364 case TIOCGICOUNT:
1365 spin_lock_irqsave(&info->slock, flags);
1366 cnow = info->icount;
1367 spin_unlock_irqrestore(&info->slock, flags);
1368 p_cuser = argp;
1369 /* modified by casper 1/11/2000 */
1370 if (put_user(cnow.frame, &p_cuser->frame))
1371 return -EFAULT;
1372 if (put_user(cnow.brk, &p_cuser->brk))
1373 return -EFAULT;
1374 if (put_user(cnow.overrun, &p_cuser->overrun))
1375 return -EFAULT;
1376 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1377 return -EFAULT;
1378 if (put_user(cnow.parity, &p_cuser->parity))
1379 return -EFAULT;
1380 if (put_user(cnow.rx, &p_cuser->rx))
1381 return -EFAULT;
1382 if (put_user(cnow.tx, &p_cuser->tx))
1383 return -EFAULT;
1384 put_user(cnow.cts, &p_cuser->cts);
1385 put_user(cnow.dsr, &p_cuser->dsr);
1386 put_user(cnow.rng, &p_cuser->rng);
1387 put_user(cnow.dcd, &p_cuser->dcd);
1388 return 0;
1389 case MOXA_HighSpeedOn:
1390 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1391 case MOXA_SDS_RSTICOUNTER: {
1392 info->mon_data.rxcnt = 0;
1393 info->mon_data.txcnt = 0;
1394 return 0;
1395 }
1396 /* (above) added by James. */
1397 case MOXA_ASPP_SETBAUD:{
1398 long baud;
1399 if (get_user(baud, (long __user *)argp))
1400 return -EFAULT;
1401 mxser_set_baud(info, baud);
1402 return 0;
1403 }
1404 case MOXA_ASPP_GETBAUD:
1405 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1406 return -EFAULT;
1407
1408 return 0;
1409
1410 case MOXA_ASPP_OQUEUE:{
1411 int len, lsr;
1412
1413 len = mxser_chars_in_buffer(tty);
1414
1415 lsr = inb(info->base + UART_LSR) & UART_LSR_TEMT;
1416
1417 len += (lsr ? 0 : 1);
1418
1419 if (copy_to_user(argp, &len, sizeof(int)))
1420 return -EFAULT;
1421
1422 return 0;
1423 }
1424 case MOXA_ASPP_MON: {
1425 int mcr, status;
1426
1427 /* info->mon_data.ser_param = tty->termios->c_cflag; */
1428
1429 status = mxser_get_msr(info->base, 1, info->port, info);
1430 mxser_check_modem_status(info, status);
1431
1432 mcr = inb(info->base + UART_MCR);
1433 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1434 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1435 else
1436 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1437
1438 if (mcr & MOXA_MUST_MCR_TX_XON)
1439 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1440 else
1441 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1442
1443 if (info->tty->hw_stopped)
1444 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1445 else
1446 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1447
1448 if (copy_to_user(argp, &info->mon_data,
1449 sizeof(struct mxser_mon)))
1450 return -EFAULT;
1451
1452 return 0;
1453 }
1454
1455 case MOXA_ASPP_LSTATUS: {
1456 if (copy_to_user(argp, &info->err_shadow,
1457 sizeof(unsigned char)))
1458 return -EFAULT;
1459
1460 info->err_shadow = 0;
1461 return 0;
1462 }
1463 case MOXA_SET_BAUD_METHOD: {
1464 int method;
1465
1466 if (get_user(method, (int __user *)argp))
1467 return -EFAULT;
1468 mxser_set_baud_method[info->port] = method;
1469 if (copy_to_user(argp, &method, sizeof(int)))
1470 return -EFAULT;
1471
1472 return 0;
1473 }
1474 default:
1475 return -ENOIOCTLCMD;
1476 }
1477 return 0;
1478 }
1479
1480 #ifndef CMSPAR
1481 #define CMSPAR 010000000000
1482 #endif
1483
1484 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1485 {
1486 int i, result, status;
1487
1488 switch (cmd) {
1489 case MOXA_GET_CONF:
1490 if (copy_to_user(argp, mxsercfg,
1491 sizeof(struct mxser_hwconf) * 4))
1492 return -EFAULT;
1493 return 0;
1494 case MOXA_GET_MAJOR:
1495 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1496 return -EFAULT;
1497 return 0;
1498
1499 case MOXA_GET_CUMAJOR:
1500 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1501 return -EFAULT;
1502 return 0;
1503
1504 case MOXA_CHKPORTENABLE:
1505 result = 0;
1506 for (i = 0; i < MXSER_PORTS; i++) {
1507 if (mxvar_table[i].base)
1508 result |= (1 << i);
1509 }
1510 return put_user(result, (unsigned long __user *)argp);
1511 case MOXA_GETDATACOUNT:
1512 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1513 return -EFAULT;
1514 return 0;
1515 case MOXA_GETMSTATUS:
1516 for (i = 0; i < MXSER_PORTS; i++) {
1517 GMStatus[i].ri = 0;
1518 if (!mxvar_table[i].base) {
1519 GMStatus[i].dcd = 0;
1520 GMStatus[i].dsr = 0;
1521 GMStatus[i].cts = 0;
1522 continue;
1523 }
1524
1525 if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios)
1526 GMStatus[i].cflag = mxvar_table[i].normal_termios.c_cflag;
1527 else
1528 GMStatus[i].cflag = mxvar_table[i].tty->termios->c_cflag;
1529
1530 status = inb(mxvar_table[i].base + UART_MSR);
1531 if (status & 0x80 /*UART_MSR_DCD */ )
1532 GMStatus[i].dcd = 1;
1533 else
1534 GMStatus[i].dcd = 0;
1535
1536 if (status & 0x20 /*UART_MSR_DSR */ )
1537 GMStatus[i].dsr = 1;
1538 else
1539 GMStatus[i].dsr = 0;
1540
1541
1542 if (status & 0x10 /*UART_MSR_CTS */ )
1543 GMStatus[i].cts = 1;
1544 else
1545 GMStatus[i].cts = 0;
1546 }
1547 if (copy_to_user(argp, GMStatus,
1548 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1549 return -EFAULT;
1550 return 0;
1551 case MOXA_ASPP_MON_EXT: {
1552 int status;
1553 int opmode, p;
1554 int shiftbit;
1555 unsigned cflag, iflag;
1556
1557 for (i = 0; i < MXSER_PORTS; i++) {
1558 if (!mxvar_table[i].base)
1559 continue;
1560
1561 status = mxser_get_msr(mxvar_table[i].base, 0,
1562 i, &(mxvar_table[i]));
1563 /*
1564 mxser_check_modem_status(&mxvar_table[i],
1565 status);
1566 */
1567 if (status & UART_MSR_TERI)
1568 mxvar_table[i].icount.rng++;
1569 if (status & UART_MSR_DDSR)
1570 mxvar_table[i].icount.dsr++;
1571 if (status & UART_MSR_DDCD)
1572 mxvar_table[i].icount.dcd++;
1573 if (status & UART_MSR_DCTS)
1574 mxvar_table[i].icount.cts++;
1575
1576 mxvar_table[i].mon_data.modem_status = status;
1577 mon_data_ext.rx_cnt[i] = mxvar_table[i].mon_data.rxcnt;
1578 mon_data_ext.tx_cnt[i] = mxvar_table[i].mon_data.txcnt;
1579 mon_data_ext.up_rxcnt[i] = mxvar_table[i].mon_data.up_rxcnt;
1580 mon_data_ext.up_txcnt[i] = mxvar_table[i].mon_data.up_txcnt;
1581 mon_data_ext.modem_status[i] = mxvar_table[i].mon_data.modem_status;
1582 mon_data_ext.baudrate[i] = mxvar_table[i].realbaud;
1583
1584 if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios) {
1585 cflag = mxvar_table[i].normal_termios.c_cflag;
1586 iflag = mxvar_table[i].normal_termios.c_iflag;
1587 } else {
1588 cflag = mxvar_table[i].tty->termios->c_cflag;
1589 iflag = mxvar_table[i].tty->termios->c_iflag;
1590 }
1591
1592 mon_data_ext.databits[i] = cflag & CSIZE;
1593
1594 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1595
1596 mon_data_ext.parity[i] = cflag & (PARENB | PARODD | CMSPAR);
1597
1598 mon_data_ext.flowctrl[i] = 0x00;
1599
1600 if (cflag & CRTSCTS)
1601 mon_data_ext.flowctrl[i] |= 0x03;
1602
1603 if (iflag & (IXON | IXOFF))
1604 mon_data_ext.flowctrl[i] |= 0x0C;
1605
1606 if (mxvar_table[i].type == PORT_16550A)
1607 mon_data_ext.fifo[i] = 1;
1608 else
1609 mon_data_ext.fifo[i] = 0;
1610
1611 p = i % 4;
1612 shiftbit = p * 2;
1613 opmode = inb(mxvar_table[i].opmode_ioaddr) >> shiftbit;
1614 opmode &= OP_MODE_MASK;
1615
1616 mon_data_ext.iftype[i] = opmode;
1617
1618 }
1619 if (copy_to_user(argp, &mon_data_ext, sizeof(struct mxser_mon_ext)))
1620 return -EFAULT;
1621
1622 return 0;
1623
1624 }
1625 default:
1626 return -ENOIOCTLCMD;
1627 }
1628 return 0;
1629 }
1630
1631 static void mxser_stoprx(struct tty_struct *tty)
1632 {
1633 struct mxser_struct *info = tty->driver_data;
1634 /* unsigned long flags; */
1635
1636 info->ldisc_stop_rx = 1;
1637 if (I_IXOFF(tty)) {
1638 /* MX_LOCK(&info->slock); */
1639 /* following add by Victor Yu. 09-02-2002 */
1640 if (info->IsMoxaMustChipFlag) {
1641 info->IER &= ~MOXA_MUST_RECV_ISR;
1642 outb(info->IER, info->base + UART_IER);
1643 } else {
1644 /* above add by Victor Yu. 09-02-2002 */
1645 info->x_char = STOP_CHAR(tty);
1646 /* mask by Victor Yu. 09-02-2002 */
1647 /* outb(info->IER, 0); */
1648 outb(0, info->base + UART_IER);
1649 info->IER |= UART_IER_THRI;
1650 /* force Tx interrupt */
1651 outb(info->IER, info->base + UART_IER);
1652 } /* add by Victor Yu. 09-02-2002 */
1653 /* MX_UNLOCK(&info->slock); */
1654 }
1655
1656 if (info->tty->termios->c_cflag & CRTSCTS) {
1657 /* MX_LOCK(&info->slock); */
1658 info->MCR &= ~UART_MCR_RTS;
1659 outb(info->MCR, info->base + UART_MCR);
1660 /* MX_UNLOCK(&info->slock); */
1661 }
1662 }
1663
1664 static void mxser_startrx(struct tty_struct *tty)
1665 {
1666 struct mxser_struct *info = tty->driver_data;
1667 /* unsigned long flags; */
1668
1669 info->ldisc_stop_rx = 0;
1670 if (I_IXOFF(tty)) {
1671 if (info->x_char)
1672 info->x_char = 0;
1673 else {
1674 /* MX_LOCK(&info->slock); */
1675
1676 /* following add by Victor Yu. 09-02-2002 */
1677 if (info->IsMoxaMustChipFlag) {
1678 info->IER |= MOXA_MUST_RECV_ISR;
1679 outb(info->IER, info->base + UART_IER);
1680 } else {
1681 /* above add by Victor Yu. 09-02-2002 */
1682
1683 info->x_char = START_CHAR(tty);
1684 /* mask by Victor Yu. 09-02-2002 */
1685 /* outb(info->IER, 0); */
1686 /* add by Victor Yu. 09-02-2002 */
1687 outb(0, info->base + UART_IER);
1688 /* force Tx interrupt */
1689 info->IER |= UART_IER_THRI;
1690 outb(info->IER, info->base + UART_IER);
1691 } /* add by Victor Yu. 09-02-2002 */
1692 /* MX_UNLOCK(&info->slock); */
1693 }
1694 }
1695
1696 if (info->tty->termios->c_cflag & CRTSCTS) {
1697 /* MX_LOCK(&info->slock); */
1698 info->MCR |= UART_MCR_RTS;
1699 outb(info->MCR, info->base + UART_MCR);
1700 /* MX_UNLOCK(&info->slock); */
1701 }
1702 }
1703
1704 /*
1705 * This routine is called by the upper-layer tty layer to signal that
1706 * incoming characters should be throttled.
1707 */
1708 static void mxser_throttle(struct tty_struct *tty)
1709 {
1710 /* struct mxser_struct *info = tty->driver_data; */
1711 /* unsigned long flags; */
1712
1713 /* MX_LOCK(&info->slock); */
1714 mxser_stoprx(tty);
1715 /* MX_UNLOCK(&info->slock); */
1716 }
1717
1718 static void mxser_unthrottle(struct tty_struct *tty)
1719 {
1720 /* struct mxser_struct *info = tty->driver_data; */
1721 /* unsigned long flags; */
1722
1723 /* MX_LOCK(&info->slock); */
1724 mxser_startrx(tty);
1725 /* MX_UNLOCK(&info->slock); */
1726 }
1727
1728 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1729 {
1730 struct mxser_struct *info = tty->driver_data;
1731 unsigned long flags;
1732
1733 if ((tty->termios->c_cflag != old_termios->c_cflag) ||
1734 (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
1735
1736 mxser_change_speed(info, old_termios);
1737
1738 if ((old_termios->c_cflag & CRTSCTS) &&
1739 !(tty->termios->c_cflag & CRTSCTS)) {
1740 tty->hw_stopped = 0;
1741 mxser_start(tty);
1742 }
1743 }
1744
1745 /* Handle sw stopped */
1746 if ((old_termios->c_iflag & IXON) &&
1747 !(tty->termios->c_iflag & IXON)) {
1748 tty->stopped = 0;
1749
1750 /* following add by Victor Yu. 09-02-2002 */
1751 if (info->IsMoxaMustChipFlag) {
1752 spin_lock_irqsave(&info->slock, flags);
1753 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
1754 spin_unlock_irqrestore(&info->slock, flags);
1755 }
1756 /* above add by Victor Yu. 09-02-2002 */
1757
1758 mxser_start(tty);
1759 }
1760 }
1761
1762 /*
1763 * mxser_stop() and mxser_start()
1764 *
1765 * This routines are called before setting or resetting tty->stopped.
1766 * They enable or disable transmitter interrupts, as necessary.
1767 */
1768 static void mxser_stop(struct tty_struct *tty)
1769 {
1770 struct mxser_struct *info = tty->driver_data;
1771 unsigned long flags;
1772
1773 spin_lock_irqsave(&info->slock, flags);
1774 if (info->IER & UART_IER_THRI) {
1775 info->IER &= ~UART_IER_THRI;
1776 outb(info->IER, info->base + UART_IER);
1777 }
1778 spin_unlock_irqrestore(&info->slock, flags);
1779 }
1780
1781 static void mxser_start(struct tty_struct *tty)
1782 {
1783 struct mxser_struct *info = tty->driver_data;
1784 unsigned long flags;
1785
1786 spin_lock_irqsave(&info->slock, flags);
1787 if (info->xmit_cnt && info->xmit_buf && !(info->IER & UART_IER_THRI)) {
1788 info->IER |= UART_IER_THRI;
1789 outb(info->IER, info->base + UART_IER);
1790 }
1791 spin_unlock_irqrestore(&info->slock, flags);
1792 }
1793
1794 /*
1795 * mxser_wait_until_sent() --- wait until the transmitter is empty
1796 */
1797 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1798 {
1799 struct mxser_struct *info = tty->driver_data;
1800 unsigned long orig_jiffies, char_time;
1801 int lsr;
1802
1803 if (info->type == PORT_UNKNOWN)
1804 return;
1805
1806 if (info->xmit_fifo_size == 0)
1807 return; /* Just in case.... */
1808
1809 orig_jiffies = jiffies;
1810 /*
1811 * Set the check interval to be 1/5 of the estimated time to
1812 * send a single character, and make it at least 1. The check
1813 * interval should also be less than the timeout.
1814 *
1815 * Note: we have to use pretty tight timings here to satisfy
1816 * the NIST-PCTS.
1817 */
1818 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1819 char_time = char_time / 5;
1820 if (char_time == 0)
1821 char_time = 1;
1822 if (timeout && timeout < char_time)
1823 char_time = timeout;
1824 /*
1825 * If the transmitter hasn't cleared in twice the approximate
1826 * amount of time to send the entire FIFO, it probably won't
1827 * ever clear. This assumes the UART isn't doing flow
1828 * control, which is currently the case. Hence, if it ever
1829 * takes longer than info->timeout, this is probably due to a
1830 * UART bug of some kind. So, we clamp the timeout parameter at
1831 * 2*info->timeout.
1832 */
1833 if (!timeout || timeout > 2 * info->timeout)
1834 timeout = 2 * info->timeout;
1835 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1836 printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
1837 timeout, char_time);
1838 printk("jiff=%lu...", jiffies);
1839 #endif
1840 while (!((lsr = inb(info->base + UART_LSR)) & UART_LSR_TEMT)) {
1841 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1842 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1843 #endif
1844 schedule_timeout_interruptible(char_time);
1845 if (signal_pending(current))
1846 break;
1847 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1848 break;
1849 }
1850 set_current_state(TASK_RUNNING);
1851
1852 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1853 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1854 #endif
1855 }
1856
1857
1858 /*
1859 * This routine is called by tty_hangup() when a hangup is signaled.
1860 */
1861 void mxser_hangup(struct tty_struct *tty)
1862 {
1863 struct mxser_struct *info = tty->driver_data;
1864
1865 mxser_flush_buffer(tty);
1866 mxser_shutdown(info);
1867 info->event = 0;
1868 info->count = 0;
1869 info->flags &= ~ASYNC_NORMAL_ACTIVE;
1870 info->tty = NULL;
1871 wake_up_interruptible(&info->open_wait);
1872 }
1873
1874
1875 /* added by James 03-12-2004. */
1876 /*
1877 * mxser_rs_break() --- routine which turns the break handling on or off
1878 */
1879 static void mxser_rs_break(struct tty_struct *tty, int break_state)
1880 {
1881 struct mxser_struct *info = tty->driver_data;
1882 unsigned long flags;
1883
1884 spin_lock_irqsave(&info->slock, flags);
1885 if (break_state == -1)
1886 outb(inb(info->base + UART_LCR) | UART_LCR_SBC,
1887 info->base + UART_LCR);
1888 else
1889 outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC,
1890 info->base + UART_LCR);
1891 spin_unlock_irqrestore(&info->slock, flags);
1892 }
1893
1894 /* (above) added by James. */
1895
1896
1897 /*
1898 * This is the serial driver's generic interrupt routine
1899 */
1900 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
1901 {
1902 int status, iir, i;
1903 struct mxser_struct *info;
1904 struct mxser_struct *port;
1905 int max, irqbits, bits, msr;
1906 int pass_counter = 0;
1907 int handled = IRQ_NONE;
1908
1909 port = NULL;
1910 /* spin_lock(&gm_lock); */
1911
1912 for (i = 0; i < MXSER_BOARDS; i++) {
1913 if (dev_id == &(mxvar_table[i * MXSER_PORTS_PER_BOARD])) {
1914 port = dev_id;
1915 break;
1916 }
1917 }
1918
1919 if (i == MXSER_BOARDS)
1920 goto irq_stop;
1921 if (port == 0)
1922 goto irq_stop;
1923 max = mxser_numports[mxsercfg[i].board_type - 1];
1924 while (1) {
1925 irqbits = inb(port->vector) & port->vectormask;
1926 if (irqbits == port->vectormask)
1927 break;
1928
1929 handled = IRQ_HANDLED;
1930 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
1931 if (irqbits == port->vectormask)
1932 break;
1933 if (bits & irqbits)
1934 continue;
1935 info = port + i;
1936
1937 /* following add by Victor Yu. 09-13-2002 */
1938 iir = inb(info->base + UART_IIR);
1939 if (iir & UART_IIR_NO_INT)
1940 continue;
1941 iir &= MOXA_MUST_IIR_MASK;
1942 if (!info->tty) {
1943 status = inb(info->base + UART_LSR);
1944 outb(0x27, info->base + UART_FCR);
1945 inb(info->base + UART_MSR);
1946 continue;
1947 }
1948 /* above add by Victor Yu. 09-13-2002 */
1949 /*
1950 if (info->tty->flip.count < TTY_FLIPBUF_SIZE / 4) {
1951 info->IER |= MOXA_MUST_RECV_ISR;
1952 outb(info->IER, info->base + UART_IER);
1953 }
1954 */
1955
1956
1957 /* mask by Victor Yu. 09-13-2002
1958 if ( !info->tty ||
1959 (inb(info->base + UART_IIR) & UART_IIR_NO_INT) )
1960 continue;
1961 */
1962 /* mask by Victor Yu. 09-02-2002
1963 status = inb(info->base + UART_LSR) & info->read_status_mask;
1964 */
1965
1966 /* following add by Victor Yu. 09-02-2002 */
1967 status = inb(info->base + UART_LSR);
1968
1969 if (status & UART_LSR_PE)
1970 info->err_shadow |= NPPI_NOTIFY_PARITY;
1971 if (status & UART_LSR_FE)
1972 info->err_shadow |= NPPI_NOTIFY_FRAMING;
1973 if (status & UART_LSR_OE)
1974 info->err_shadow |= NPPI_NOTIFY_HW_OVERRUN;
1975 if (status & UART_LSR_BI)
1976 info->err_shadow |= NPPI_NOTIFY_BREAK;
1977
1978 if (info->IsMoxaMustChipFlag) {
1979 /*
1980 if ( (status & 0x02) && !(status & 0x01) ) {
1981 outb(info->base+UART_FCR, 0x23);
1982 continue;
1983 }
1984 */
1985 if (iir == MOXA_MUST_IIR_GDA ||
1986 iir == MOXA_MUST_IIR_RDA ||
1987 iir == MOXA_MUST_IIR_RTO ||
1988 iir == MOXA_MUST_IIR_LSR)
1989 mxser_receive_chars(info, &status);
1990
1991 } else {
1992 /* above add by Victor Yu. 09-02-2002 */
1993
1994 status &= info->read_status_mask;
1995 if (status & UART_LSR_DR)
1996 mxser_receive_chars(info, &status);
1997 }
1998 msr = inb(info->base + UART_MSR);
1999 if (msr & UART_MSR_ANY_DELTA) {
2000 mxser_check_modem_status(info, msr);
2001 }
2002 /* following add by Victor Yu. 09-13-2002 */
2003 if (info->IsMoxaMustChipFlag) {
2004 if ((iir == 0x02) && (status & UART_LSR_THRE)) {
2005 mxser_transmit_chars(info);
2006 }
2007 } else {
2008 /* above add by Victor Yu. 09-13-2002 */
2009
2010 if (status & UART_LSR_THRE) {
2011 /* 8-2-99 by William
2012 if ( info->x_char || (info->xmit_cnt > 0) )
2013 */
2014 mxser_transmit_chars(info);
2015 }
2016 }
2017 }
2018 if (pass_counter++ > MXSER_ISR_PASS_LIMIT) {
2019 break; /* Prevent infinite loops */
2020 }
2021 }
2022
2023 irq_stop:
2024 /* spin_unlock(&gm_lock); */
2025 return handled;
2026 }
2027
2028 static void mxser_receive_chars(struct mxser_struct *info, int *status)
2029 {
2030 struct tty_struct *tty = info->tty;
2031 unsigned char ch, gdl;
2032 int ignored = 0;
2033 int cnt = 0;
2034 int recv_room;
2035 int max = 256;
2036 unsigned long flags;
2037
2038 spin_lock_irqsave(&info->slock, flags);
2039
2040 recv_room = tty->receive_room;
2041 if ((recv_room == 0) && (!info->ldisc_stop_rx)) {
2042 /* mxser_throttle(tty); */
2043 mxser_stoprx(tty);
2044 /* return; */
2045 }
2046
2047 /* following add by Victor Yu. 09-02-2002 */
2048 if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
2049
2050 if (*status & UART_LSR_SPECIAL) {
2051 goto intr_old;
2052 }
2053 /* following add by Victor Yu. 02-11-2004 */
2054 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID &&
2055 (*status & MOXA_MUST_LSR_RERR))
2056 goto intr_old;
2057 /* above add by Victor Yu. 02-14-2004 */
2058 if (*status & MOXA_MUST_LSR_RERR)
2059 goto intr_old;
2060
2061 gdl = inb(info->base + MOXA_MUST_GDL_REGISTER);
2062
2063 /* add by Victor Yu. 02-11-2004 */
2064 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU150_HWID)
2065 gdl &= MOXA_MUST_GDL_MASK;
2066 if (gdl >= recv_room) {
2067 if (!info->ldisc_stop_rx) {
2068 /* mxser_throttle(tty); */
2069 mxser_stoprx(tty);
2070 }
2071 /* return; */
2072 }
2073 while (gdl--) {
2074 ch = inb(info->base + UART_RX);
2075 tty_insert_flip_char(tty, ch, 0);
2076 cnt++;
2077 /*
2078 if ((cnt >= HI_WATER) && (info->stop_rx == 0)) {
2079 mxser_stoprx(tty);
2080 info->stop_rx = 1;
2081 break;
2082 } */
2083 }
2084 goto end_intr;
2085 }
2086 intr_old:
2087 /* above add by Victor Yu. 09-02-2002 */
2088
2089 do {
2090 if (max-- < 0)
2091 break;
2092 /*
2093 if ((cnt >= HI_WATER) && (info->stop_rx == 0)) {
2094 mxser_stoprx(tty);
2095 info->stop_rx=1;
2096 break;
2097 }
2098 */
2099
2100 ch = inb(info->base + UART_RX);
2101 /* following add by Victor Yu. 09-02-2002 */
2102 if (info->IsMoxaMustChipFlag && (*status & UART_LSR_OE) /*&& !(*status&UART_LSR_DR) */ )
2103 outb(0x23, info->base + UART_FCR);
2104 *status &= info->read_status_mask;
2105 /* above add by Victor Yu. 09-02-2002 */
2106 if (*status & info->ignore_status_mask) {
2107 if (++ignored > 100)
2108 break;
2109 } else {
2110 char flag = 0;
2111 if (*status & UART_LSR_SPECIAL) {
2112 if (*status & UART_LSR_BI) {
2113 flag = TTY_BREAK;
2114 /* added by casper 1/11/2000 */
2115 info->icount.brk++;
2116 /* */
2117 if (info->flags & ASYNC_SAK)
2118 do_SAK(tty);
2119 } else if (*status & UART_LSR_PE) {
2120 flag = TTY_PARITY;
2121 /* added by casper 1/11/2000 */
2122 info->icount.parity++;
2123 /* */
2124 } else if (*status & UART_LSR_FE) {
2125 flag = TTY_FRAME;
2126 /* added by casper 1/11/2000 */
2127 info->icount.frame++;
2128 /* */
2129 } else if (*status & UART_LSR_OE) {
2130 flag = TTY_OVERRUN;
2131 /* added by casper 1/11/2000 */
2132 info->icount.overrun++;
2133 /* */
2134 }
2135 }
2136 tty_insert_flip_char(tty, ch, flag);
2137 cnt++;
2138 if (cnt >= recv_room) {
2139 if (!info->ldisc_stop_rx) {
2140 /* mxser_throttle(tty); */
2141 mxser_stoprx(tty);
2142 }
2143 break;
2144 }
2145
2146 }
2147
2148 /* following add by Victor Yu. 09-02-2002 */
2149 if (info->IsMoxaMustChipFlag)
2150 break;
2151 /* above add by Victor Yu. 09-02-2002 */
2152
2153 /* mask by Victor Yu. 09-02-2002
2154 *status = inb(info->base + UART_LSR) & info->read_status_mask;
2155 */
2156 /* following add by Victor Yu. 09-02-2002 */
2157 *status = inb(info->base + UART_LSR);
2158 /* above add by Victor Yu. 09-02-2002 */
2159 } while (*status & UART_LSR_DR);
2160
2161 end_intr: /* add by Victor Yu. 09-02-2002 */
2162 mxvar_log.rxcnt[info->port] += cnt;
2163 info->mon_data.rxcnt += cnt;
2164 info->mon_data.up_rxcnt += cnt;
2165 spin_unlock_irqrestore(&info->slock, flags);
2166
2167 tty_flip_buffer_push(tty);
2168 }
2169
2170 static void mxser_transmit_chars(struct mxser_struct *info)
2171 {
2172 int count, cnt;
2173 unsigned long flags;
2174
2175 spin_lock_irqsave(&info->slock, flags);
2176
2177 if (info->x_char) {
2178 outb(info->x_char, info->base + UART_TX);
2179 info->x_char = 0;
2180 mxvar_log.txcnt[info->port]++;
2181 info->mon_data.txcnt++;
2182 info->mon_data.up_txcnt++;
2183
2184 /* added by casper 1/11/2000 */
2185 info->icount.tx++;
2186 /* */
2187 spin_unlock_irqrestore(&info->slock, flags);
2188 return;
2189 }
2190
2191 if (info->xmit_buf == 0) {
2192 spin_unlock_irqrestore(&info->slock, flags);
2193 return;
2194 }
2195
2196 if ((info->xmit_cnt <= 0) || info->tty->stopped ||
2197 (info->tty->hw_stopped &&
2198 (info->type != PORT_16550A) &&
2199 (!info->IsMoxaMustChipFlag))) {
2200 info->IER &= ~UART_IER_THRI;
2201 outb(info->IER, info->base + UART_IER);
2202 spin_unlock_irqrestore(&info->slock, flags);
2203 return;
2204 }
2205
2206 cnt = info->xmit_cnt;
2207 count = info->xmit_fifo_size;
2208 do {
2209 outb(info->xmit_buf[info->xmit_tail++],
2210 info->base + UART_TX);
2211 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2212 if (--info->xmit_cnt <= 0)
2213 break;
2214 } while (--count > 0);
2215 mxvar_log.txcnt[info->port] += (cnt - info->xmit_cnt);
2216
2217 /* added by James 03-12-2004. */
2218 info->mon_data.txcnt += (cnt - info->xmit_cnt);
2219 info->mon_data.up_txcnt += (cnt - info->xmit_cnt);
2220 /* (above) added by James. */
2221
2222 /* added by casper 1/11/2000 */
2223 info->icount.tx += (cnt - info->xmit_cnt);
2224 /* */
2225
2226 if (info->xmit_cnt < WAKEUP_CHARS) {
2227 set_bit(MXSER_EVENT_TXLOW, &info->event);
2228 schedule_work(&info->tqueue);
2229 }
2230 if (info->xmit_cnt <= 0) {
2231 info->IER &= ~UART_IER_THRI;
2232 outb(info->IER, info->base + UART_IER);
2233 }
2234 spin_unlock_irqrestore(&info->slock, flags);
2235 }
2236
2237 static void mxser_check_modem_status(struct mxser_struct *info, int status)
2238 {
2239 /* update input line counters */
2240 if (status & UART_MSR_TERI)
2241 info->icount.rng++;
2242 if (status & UART_MSR_DDSR)
2243 info->icount.dsr++;
2244 if (status & UART_MSR_DDCD)
2245 info->icount.dcd++;
2246 if (status & UART_MSR_DCTS)
2247 info->icount.cts++;
2248 info->mon_data.modem_status = status;
2249 wake_up_interruptible(&info->delta_msr_wait);
2250
2251 if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
2252 if (status & UART_MSR_DCD)
2253 wake_up_interruptible(&info->open_wait);
2254 schedule_work(&info->tqueue);
2255 }
2256
2257 if (info->flags & ASYNC_CTS_FLOW) {
2258 if (info->tty->hw_stopped) {
2259 if (status & UART_MSR_CTS) {
2260 info->tty->hw_stopped = 0;
2261
2262 if ((info->type != PORT_16550A) &&
2263 (!info->IsMoxaMustChipFlag)) {
2264 info->IER |= UART_IER_THRI;
2265 outb(info->IER, info->base + UART_IER);
2266 }
2267 set_bit(MXSER_EVENT_TXLOW, &info->event);
2268 schedule_work(&info->tqueue); }
2269 } else {
2270 if (!(status & UART_MSR_CTS)) {
2271 info->tty->hw_stopped = 1;
2272 if ((info->type != PORT_16550A) &&
2273 (!info->IsMoxaMustChipFlag)) {
2274 info->IER &= ~UART_IER_THRI;
2275 outb(info->IER, info->base + UART_IER);
2276 }
2277 }
2278 }
2279 }
2280 }
2281
2282 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, struct mxser_struct *info)
2283 {
2284 DECLARE_WAITQUEUE(wait, current);
2285 int retval;
2286 int do_clocal = 0;
2287 unsigned long flags;
2288
2289 /*
2290 * If non-blocking mode is set, or the port is not enabled,
2291 * then make the check up front and then exit.
2292 */
2293 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2294 info->flags |= ASYNC_NORMAL_ACTIVE;
2295 return 0;
2296 }
2297
2298 if (tty->termios->c_cflag & CLOCAL)
2299 do_clocal = 1;
2300
2301 /*
2302 * Block waiting for the carrier detect and the line to become
2303 * free (i.e., not in use by the callout). While we are in
2304 * this loop, info->count is dropped by one, so that
2305 * mxser_close() knows when to free things. We restore it upon
2306 * exit, either normal or abnormal.
2307 */
2308 retval = 0;
2309 add_wait_queue(&info->open_wait, &wait);
2310
2311 spin_lock_irqsave(&info->slock, flags);
2312 if (!tty_hung_up_p(filp))
2313 info->count--;
2314 spin_unlock_irqrestore(&info->slock, flags);
2315 info->blocked_open++;
2316 while (1) {
2317 spin_lock_irqsave(&info->slock, flags);
2318 outb(inb(info->base + UART_MCR) |
2319 UART_MCR_DTR | UART_MCR_RTS, info->base + UART_MCR);
2320 spin_unlock_irqrestore(&info->slock, flags);
2321 set_current_state(TASK_INTERRUPTIBLE);
2322 if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)) {
2323 if (info->flags & ASYNC_HUP_NOTIFY)
2324 retval = -EAGAIN;
2325 else
2326 retval = -ERESTARTSYS;
2327 break;
2328 }
2329 if (!(info->flags & ASYNC_CLOSING) &&
2330 (do_clocal ||
2331 (inb(info->base + UART_MSR) & UART_MSR_DCD)))
2332 break;
2333 if (signal_pending(current)) {
2334 retval = -ERESTARTSYS;
2335 break;
2336 }
2337 schedule();
2338 }
2339 set_current_state(TASK_RUNNING);
2340 remove_wait_queue(&info->open_wait, &wait);
2341 if (!tty_hung_up_p(filp))
2342 info->count++;
2343 info->blocked_open--;
2344 if (retval)
2345 return retval;
2346 info->flags |= ASYNC_NORMAL_ACTIVE;
2347 return 0;
2348 }
2349
2350 static int mxser_startup(struct mxser_struct *info)
2351 {
2352 unsigned long page;
2353 unsigned long flags;
2354
2355 page = __get_free_page(GFP_KERNEL);
2356 if (!page)
2357 return -ENOMEM;
2358
2359 spin_lock_irqsave(&info->slock, flags);
2360
2361 if (info->flags & ASYNC_INITIALIZED) {
2362 free_page(page);
2363 spin_unlock_irqrestore(&info->slock, flags);
2364 return 0;
2365 }
2366
2367 if (!info->base || !info->type) {
2368 if (info->tty)
2369 set_bit(TTY_IO_ERROR, &info->tty->flags);
2370 free_page(page);
2371 spin_unlock_irqrestore(&info->slock, flags);
2372 return 0;
2373 }
2374 if (info->xmit_buf)
2375 free_page(page);
2376 else
2377 info->xmit_buf = (unsigned char *) page;
2378
2379 /*
2380 * Clear the FIFO buffers and disable them
2381 * (they will be reenabled in mxser_change_speed())
2382 */
2383 if (info->IsMoxaMustChipFlag)
2384 outb((UART_FCR_CLEAR_RCVR |
2385 UART_FCR_CLEAR_XMIT |
2386 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2387 else
2388 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
2389 info->base + UART_FCR);
2390
2391 /*
2392 * At this point there's no way the LSR could still be 0xFF;
2393 * if it is, then bail out, because there's likely no UART
2394 * here.
2395 */
2396 if (inb(info->base + UART_LSR) == 0xff) {
2397 spin_unlock_irqrestore(&info->slock, flags);
2398 if (capable(CAP_SYS_ADMIN)) {
2399 if (info->tty)
2400 set_bit(TTY_IO_ERROR, &info->tty->flags);
2401 return 0;
2402 } else
2403 return -ENODEV;
2404 }
2405
2406 /*
2407 * Clear the interrupt registers.
2408 */
2409 (void) inb(info->base + UART_LSR);
2410 (void) inb(info->base + UART_RX);
2411 (void) inb(info->base + UART_IIR);
2412 (void) inb(info->base + UART_MSR);
2413
2414 /*
2415 * Now, initialize the UART
2416 */
2417 outb(UART_LCR_WLEN8, info->base + UART_LCR); /* reset DLAB */
2418 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
2419 outb(info->MCR, info->base + UART_MCR);
2420
2421 /*
2422 * Finally, enable interrupts
2423 */
2424 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
2425 /* info->IER = UART_IER_RLSI | UART_IER_RDI; */
2426
2427 /* following add by Victor Yu. 08-30-2002 */
2428 if (info->IsMoxaMustChipFlag)
2429 info->IER |= MOXA_MUST_IER_EGDAI;
2430 /* above add by Victor Yu. 08-30-2002 */
2431 outb(info->IER, info->base + UART_IER); /* enable interrupts */
2432
2433 /*
2434 * And clear the interrupt registers again for luck.
2435 */
2436 (void) inb(info->base + UART_LSR);
2437 (void) inb(info->base + UART_RX);
2438 (void) inb(info->base + UART_IIR);
2439 (void) inb(info->base + UART_MSR);
2440
2441 if (info->tty)
2442 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2443 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2444
2445 /*
2446 * and set the speed of the serial port
2447 */
2448 spin_unlock_irqrestore(&info->slock, flags);
2449 mxser_change_speed(info, NULL);
2450
2451 info->flags |= ASYNC_INITIALIZED;
2452 return 0;
2453 }
2454
2455 /*
2456 * This routine will shutdown a serial port; interrupts maybe disabled, and
2457 * DTR is dropped if the hangup on close termio flag is on.
2458 */
2459 static void mxser_shutdown(struct mxser_struct *info)
2460 {
2461 unsigned long flags;
2462
2463 if (!(info->flags & ASYNC_INITIALIZED))
2464 return;
2465
2466 spin_lock_irqsave(&info->slock, flags);
2467
2468 /*
2469 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
2470 * here so the queue might never be waken up
2471 */
2472 wake_up_interruptible(&info->delta_msr_wait);
2473
2474 /*
2475 * Free the IRQ, if necessary
2476 */
2477 if (info->xmit_buf) {
2478 free_page((unsigned long) info->xmit_buf);
2479 info->xmit_buf = NULL;
2480 }
2481
2482 info->IER = 0;
2483 outb(0x00, info->base + UART_IER);
2484
2485 if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
2486 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
2487 outb(info->MCR, info->base + UART_MCR);
2488
2489 /* clear Rx/Tx FIFO's */
2490 /* following add by Victor Yu. 08-30-2002 */
2491 if (info->IsMoxaMustChipFlag)
2492 outb((UART_FCR_CLEAR_RCVR |
2493 UART_FCR_CLEAR_XMIT |
2494 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2495 else
2496 /* above add by Victor Yu. 08-30-2002 */
2497 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
2498 info->base + UART_FCR);
2499
2500 /* read data port to reset things */
2501 (void) inb(info->base + UART_RX);
2502
2503 if (info->tty)
2504 set_bit(TTY_IO_ERROR, &info->tty->flags);
2505
2506 info->flags &= ~ASYNC_INITIALIZED;
2507
2508 /* following add by Victor Yu. 09-23-2002 */
2509 if (info->IsMoxaMustChipFlag)
2510 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->base);
2511 /* above add by Victor Yu. 09-23-2002 */
2512
2513 spin_unlock_irqrestore(&info->slock, flags);
2514 }
2515
2516 /*
2517 * This routine is called to set the UART divisor registers to match
2518 * the specified baud rate for a serial port.
2519 */
2520 static int mxser_change_speed(struct mxser_struct *info, struct ktermios *old_termios)
2521 {
2522 unsigned cflag, cval, fcr;
2523 int ret = 0;
2524 unsigned char status;
2525 long baud;
2526 unsigned long flags;
2527
2528 if (!info->tty || !info->tty->termios)
2529 return ret;
2530 cflag = info->tty->termios->c_cflag;
2531 if (!(info->base))
2532 return ret;
2533
2534 #ifndef B921600
2535 #define B921600 (B460800 +1)
2536 #endif
2537 if (mxser_set_baud_method[info->port] == 0) {
2538 baud = tty_get_baud_rate(info->tty);
2539 mxser_set_baud(info, baud);
2540 }
2541
2542 /* byte size and parity */
2543 switch (cflag & CSIZE) {
2544 case CS5:
2545 cval = 0x00;
2546 break;
2547 case CS6:
2548 cval = 0x01;
2549 break;
2550 case CS7:
2551 cval = 0x02;
2552 break;
2553 case CS8:
2554 cval = 0x03;
2555 break;
2556 default:
2557 cval = 0x00;
2558 break; /* too keep GCC shut... */
2559 }
2560 if (cflag & CSTOPB)
2561 cval |= 0x04;
2562 if (cflag & PARENB)
2563 cval |= UART_LCR_PARITY;
2564 if (!(cflag & PARODD))
2565 cval |= UART_LCR_EPAR;
2566 if (cflag & CMSPAR)
2567 cval |= UART_LCR_SPAR;
2568
2569 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
2570 if (info->IsMoxaMustChipFlag) {
2571 fcr = UART_FCR_ENABLE_FIFO;
2572 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2573 SET_MOXA_MUST_FIFO_VALUE(info);
2574 } else
2575 fcr = 0;
2576 } else {
2577 fcr = UART_FCR_ENABLE_FIFO;
2578 /* following add by Victor Yu. 08-30-2002 */
2579 if (info->IsMoxaMustChipFlag) {
2580 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2581 SET_MOXA_MUST_FIFO_VALUE(info);
2582 } else {
2583 /* above add by Victor Yu. 08-30-2002 */
2584 switch (info->rx_trigger) {
2585 case 1:
2586 fcr |= UART_FCR_TRIGGER_1;
2587 break;
2588 case 4:
2589 fcr |= UART_FCR_TRIGGER_4;
2590 break;
2591 case 8:
2592 fcr |= UART_FCR_TRIGGER_8;
2593 break;
2594 default:
2595 fcr |= UART_FCR_TRIGGER_14;
2596 break;
2597 }
2598 }
2599 }
2600
2601 /* CTS flow control flag and modem status interrupts */
2602 info->IER &= ~UART_IER_MSI;
2603 info->MCR &= ~UART_MCR_AFE;
2604 if (cflag & CRTSCTS) {
2605 info->flags |= ASYNC_CTS_FLOW;
2606 info->IER |= UART_IER_MSI;
2607 if ((info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
2608 info->MCR |= UART_MCR_AFE;
2609 /* status = mxser_get_msr(info->base, 0, info->port); */
2610 /*
2611 save_flags(flags);
2612 cli();
2613 status = inb(baseaddr + UART_MSR);
2614 restore_flags(flags);
2615 */
2616 /* mxser_check_modem_status(info, status); */
2617 } else {
2618 /* status = mxser_get_msr(info->base, 0, info->port); */
2619 /* MX_LOCK(&info->slock); */
2620 status = inb(info->base + UART_MSR);
2621 /* MX_UNLOCK(&info->slock); */
2622 if (info->tty->hw_stopped) {
2623 if (status & UART_MSR_CTS) {
2624 info->tty->hw_stopped = 0;
2625 if ((info->type != PORT_16550A) &&
2626 (!info->IsMoxaMustChipFlag)) {
2627 info->IER |= UART_IER_THRI;
2628 outb(info->IER, info->base + UART_IER);
2629 }
2630 set_bit(MXSER_EVENT_TXLOW, &info->event);
2631 schedule_work(&info->tqueue); }
2632 } else {
2633 if (!(status & UART_MSR_CTS)) {
2634 info->tty->hw_stopped = 1;
2635 if ((info->type != PORT_16550A) &&
2636 (!info->IsMoxaMustChipFlag)) {
2637 info->IER &= ~UART_IER_THRI;
2638 outb(info->IER, info->base + UART_IER);
2639 }
2640 }
2641 }
2642 }
2643 } else {
2644 info->flags &= ~ASYNC_CTS_FLOW;
2645 }
2646 outb(info->MCR, info->base + UART_MCR);
2647 if (cflag & CLOCAL) {
2648 info->flags &= ~ASYNC_CHECK_CD;
2649 } else {
2650 info->flags |= ASYNC_CHECK_CD;
2651 info->IER |= UART_IER_MSI;
2652 }
2653 outb(info->IER, info->base + UART_IER);
2654
2655 /*
2656 * Set up parity check flag
2657 */
2658 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
2659 if (I_INPCK(info->tty))
2660 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
2661 if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
2662 info->read_status_mask |= UART_LSR_BI;
2663
2664 info->ignore_status_mask = 0;
2665
2666 if (I_IGNBRK(info->tty)) {
2667 info->ignore_status_mask |= UART_LSR_BI;
2668 info->read_status_mask |= UART_LSR_BI;
2669 /*
2670 * If we're ignore parity and break indicators, ignore
2671 * overruns too. (For real raw support).
2672 */
2673 if (I_IGNPAR(info->tty)) {
2674 info->ignore_status_mask |=
2675 UART_LSR_OE |
2676 UART_LSR_PE |
2677 UART_LSR_FE;
2678 info->read_status_mask |=
2679 UART_LSR_OE |
2680 UART_LSR_PE |
2681 UART_LSR_FE;
2682 }
2683 }
2684 /* following add by Victor Yu. 09-02-2002 */
2685 if (info->IsMoxaMustChipFlag) {
2686 spin_lock_irqsave(&info->slock, flags);
2687 SET_MOXA_MUST_XON1_VALUE(info->base, START_CHAR(info->tty));
2688 SET_MOXA_MUST_XOFF1_VALUE(info->base, STOP_CHAR(info->tty));
2689 if (I_IXON(info->tty)) {
2690 ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2691 } else {
2692 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2693 }
2694 if (I_IXOFF(info->tty)) {
2695 ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2696 } else {
2697 DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2698 }
2699 /*
2700 if ( I_IXANY(info->tty) ) {
2701 info->MCR |= MOXA_MUST_MCR_XON_ANY;
2702 ENABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2703 } else {
2704 info->MCR &= ~MOXA_MUST_MCR_XON_ANY;
2705 DISABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2706 }
2707 */
2708 spin_unlock_irqrestore(&info->slock, flags);
2709 }
2710 /* above add by Victor Yu. 09-02-2002 */
2711
2712
2713 outb(fcr, info->base + UART_FCR); /* set fcr */
2714 outb(cval, info->base + UART_LCR);
2715
2716 return ret;
2717 }
2718
2719
2720 static int mxser_set_baud(struct mxser_struct *info, long newspd)
2721 {
2722 int quot = 0;
2723 unsigned char cval;
2724 int ret = 0;
2725 unsigned long flags;
2726
2727 if (!info->tty || !info->tty->termios)
2728 return ret;
2729
2730 if (!(info->base))
2731 return ret;
2732
2733 if (newspd > info->MaxCanSetBaudRate)
2734 return 0;
2735
2736 info->realbaud = newspd;
2737 if (newspd == 134) {
2738 quot = (2 * info->baud_base / 269);
2739 } else if (newspd) {
2740 quot = info->baud_base / newspd;
2741 if (quot == 0)
2742 quot = 1;
2743 } else {
2744 quot = 0;
2745 }
2746
2747 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
2748 info->timeout += HZ / 50; /* Add .02 seconds of slop */
2749
2750 if (quot) {
2751 spin_lock_irqsave(&info->slock, flags);
2752 info->MCR |= UART_MCR_DTR;
2753 outb(info->MCR, info->base + UART_MCR);
2754 spin_unlock_irqrestore(&info->slock, flags);
2755 } else {
2756 spin_lock_irqsave(&info->slock, flags);
2757 info->MCR &= ~UART_MCR_DTR;
2758 outb(info->MCR, info->base + UART_MCR);
2759 spin_unlock_irqrestore(&info->slock, flags);
2760 return ret;
2761 }
2762
2763 cval = inb(info->base + UART_LCR);
2764
2765 outb(cval | UART_LCR_DLAB, info->base + UART_LCR); /* set DLAB */
2766
2767 outb(quot & 0xff, info->base + UART_DLL); /* LS of divisor */
2768 outb(quot >> 8, info->base + UART_DLM); /* MS of divisor */
2769 outb(cval, info->base + UART_LCR); /* reset DLAB */
2770
2771
2772 return ret;
2773 }
2774
2775 /*
2776 * ------------------------------------------------------------
2777 * friends of mxser_ioctl()
2778 * ------------------------------------------------------------
2779 */
2780 static int mxser_get_serial_info(struct mxser_struct *info, struct serial_struct __user *retinfo)
2781 {
2782 struct serial_struct tmp;
2783
2784 if (!retinfo)
2785 return -EFAULT;
2786 memset(&tmp, 0, sizeof(tmp));
2787 tmp.type = info->type;
2788 tmp.line = info->port;
2789 tmp.port = info->base;
2790 tmp.irq = info->irq;
2791 tmp.flags = info->flags;
2792 tmp.baud_base = info->baud_base;
2793 tmp.close_delay = info->close_delay;
2794 tmp.closing_wait = info->closing_wait;
2795 tmp.custom_divisor = info->custom_divisor;
2796 tmp.hub6 = 0;
2797 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2798 return -EFAULT;
2799 return 0;
2800 }
2801
2802 static int mxser_set_serial_info(struct mxser_struct *info, struct serial_struct __user *new_info)
2803 {
2804 struct serial_struct new_serial;
2805 unsigned int flags;
2806 int retval = 0;
2807
2808 if (!new_info || !info->base)
2809 return -EFAULT;
2810 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2811 return -EFAULT;
2812
2813 if ((new_serial.irq != info->irq) ||
2814 (new_serial.port != info->base) ||
2815 (new_serial.custom_divisor != info->custom_divisor) ||
2816 (new_serial.baud_base != info->baud_base))
2817 return -EPERM;
2818
2819 flags = info->flags & ASYNC_SPD_MASK;
2820
2821 if (!capable(CAP_SYS_ADMIN)) {
2822 if ((new_serial.baud_base != info->baud_base) ||
2823 (new_serial.close_delay != info->close_delay) ||
2824 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
2825 return -EPERM;
2826 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
2827 (new_serial.flags & ASYNC_USR_MASK));
2828 } else {
2829 /*
2830 * OK, past this point, all the error checking has been done.
2831 * At this point, we start making changes.....
2832 */
2833 info->flags = ((info->flags & ~ASYNC_FLAGS) |
2834 (new_serial.flags & ASYNC_FLAGS));
2835 info->close_delay = new_serial.close_delay * HZ / 100;
2836 info->closing_wait = new_serial.closing_wait * HZ / 100;
2837 info->tty->low_latency =
2838 (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2839 info->tty->low_latency = 0; /* (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0; */
2840 }
2841
2842 /* added by casper, 3/17/2000, for mouse */
2843 info->type = new_serial.type;
2844
2845 process_txrx_fifo(info);
2846
2847 if (info->flags & ASYNC_INITIALIZED) {
2848 if (flags != (info->flags & ASYNC_SPD_MASK)) {
2849 mxser_change_speed(info, NULL);
2850 }
2851 } else {
2852 retval = mxser_startup(info);
2853 }
2854 return retval;
2855 }
2856
2857 /*
2858 * mxser_get_lsr_info - get line status register info
2859 *
2860 * Purpose: Let user call ioctl() to get info when the UART physically
2861 * is emptied. On bus types like RS485, the transmitter must
2862 * release the bus after transmitting. This must be done when
2863 * the transmit shift register is empty, not be done when the
2864 * transmit holding register is empty. This functionality
2865 * allows an RS485 driver to be written in user space.
2866 */
2867 static int mxser_get_lsr_info(struct mxser_struct *info, unsigned int __user *value)
2868 {
2869 unsigned char status;
2870 unsigned int result;
2871 unsigned long flags;
2872
2873 spin_lock_irqsave(&info->slock, flags);
2874 status = inb(info->base + UART_LSR);
2875 spin_unlock_irqrestore(&info->slock, flags);
2876 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
2877 return put_user(result, value);
2878 }
2879
2880 /*
2881 * This routine sends a break character out the serial port.
2882 */
2883 static void mxser_send_break(struct mxser_struct *info, int duration)
2884 {
2885 unsigned long flags;
2886
2887 if (!info->base)
2888 return;
2889 set_current_state(TASK_INTERRUPTIBLE);
2890 spin_lock_irqsave(&info->slock, flags);
2891 outb(inb(info->base + UART_LCR) | UART_LCR_SBC,
2892 info->base + UART_LCR);
2893 spin_unlock_irqrestore(&info->slock, flags);
2894 schedule_timeout(duration);
2895 spin_lock_irqsave(&info->slock, flags);
2896 outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC,
2897 info->base + UART_LCR);
2898 spin_unlock_irqrestore(&info->slock, flags);
2899 }
2900
2901 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
2902 {
2903 struct mxser_struct *info = tty->driver_data;
2904 unsigned char control, status;
2905 unsigned long flags;
2906
2907
2908 if (tty->index == MXSER_PORTS)
2909 return -ENOIOCTLCMD;
2910 if (tty->flags & (1 << TTY_IO_ERROR))
2911 return -EIO;
2912
2913 control = info->MCR;
2914
2915 spin_lock_irqsave(&info->slock, flags);
2916 status = inb(info->base + UART_MSR);
2917 if (status & UART_MSR_ANY_DELTA)
2918 mxser_check_modem_status(info, status);
2919 spin_unlock_irqrestore(&info->slock, flags);
2920 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
2921 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
2922 ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
2923 ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
2924 ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
2925 ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
2926 }
2927
2928 static int mxser_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear)
2929 {
2930 struct mxser_struct *info = tty->driver_data;
2931 unsigned long flags;
2932
2933
2934 if (tty->index == MXSER_PORTS)
2935 return -ENOIOCTLCMD;
2936 if (tty->flags & (1 << TTY_IO_ERROR))
2937 return -EIO;
2938
2939 spin_lock_irqsave(&info->slock, flags);
2940
2941 if (set & TIOCM_RTS)
2942 info->MCR |= UART_MCR_RTS;
2943 if (set & TIOCM_DTR)
2944 info->MCR |= UART_MCR_DTR;
2945
2946 if (clear & TIOCM_RTS)
2947 info->MCR &= ~UART_MCR_RTS;
2948 if (clear & TIOCM_DTR)
2949 info->MCR &= ~UART_MCR_DTR;
2950
2951 outb(info->MCR, info->base + UART_MCR);
2952 spin_unlock_irqrestore(&info->slock, flags);
2953 return 0;
2954 }
2955
2956
2957 static int mxser_read_register(int, unsigned short *);
2958 static int mxser_program_mode(int);
2959 static void mxser_normal_mode(int);
2960
2961 static int mxser_get_ISA_conf(int cap, struct mxser_hwconf *hwconf)
2962 {
2963 int id, i, bits;
2964 unsigned short regs[16], irq;
2965 unsigned char scratch, scratch2;
2966
2967 hwconf->IsMoxaMustChipFlag = MOXA_OTHER_UART;
2968
2969 id = mxser_read_register(cap, regs);
2970 if (id == C168_ASIC_ID) {
2971 hwconf->board_type = MXSER_BOARD_C168_ISA;
2972 hwconf->ports = 8;
2973 } else if (id == C104_ASIC_ID) {
2974 hwconf->board_type = MXSER_BOARD_C104_ISA;
2975 hwconf->ports = 4;
2976 } else if (id == C102_ASIC_ID) {
2977 hwconf->board_type = MXSER_BOARD_C102_ISA;
2978 hwconf->ports = 2;
2979 } else if (id == CI132_ASIC_ID) {
2980 hwconf->board_type = MXSER_BOARD_CI132;
2981 hwconf->ports = 2;
2982 } else if (id == CI134_ASIC_ID) {
2983 hwconf->board_type = MXSER_BOARD_CI134;
2984 hwconf->ports = 4;
2985 } else if (id == CI104J_ASIC_ID) {
2986 hwconf->board_type = MXSER_BOARD_CI104J;
2987 hwconf->ports = 4;
2988 } else
2989 return 0;
2990
2991 irq = 0;
2992 if (hwconf->ports == 2) {
2993 irq = regs[9] & 0xF000;
2994 irq = irq | (irq >> 4);
2995 if (irq != (regs[9] & 0xFF00))
2996 return MXSER_ERR_IRQ_CONFLIT;
2997 } else if (hwconf->ports == 4) {
2998 irq = regs[9] & 0xF000;
2999 irq = irq | (irq >> 4);
3000 irq = irq | (irq >> 8);
3001 if (irq != regs[9])
3002 return MXSER_ERR_IRQ_CONFLIT;
3003 } else if (hwconf->ports == 8) {
3004 irq = regs[9] & 0xF000;
3005 irq = irq | (irq >> 4);
3006 irq = irq | (irq >> 8);
3007 if ((irq != regs[9]) || (irq != regs[10]))
3008 return MXSER_ERR_IRQ_CONFLIT;
3009 }
3010
3011 if (!irq)
3012 return MXSER_ERR_IRQ;
3013 hwconf->irq = ((int)(irq & 0xF000) >> 12);
3014 for (i = 0; i < 8; i++)
3015 hwconf->ioaddr[i] = (int) regs[i + 1] & 0xFFF8;
3016 if ((regs[12] & 0x80) == 0)
3017 return MXSER_ERR_VECTOR;
3018 hwconf->vector = (int)regs[11]; /* interrupt vector */
3019 if (id == 1)
3020 hwconf->vector_mask = 0x00FF;
3021 else
3022 hwconf->vector_mask = 0x000F;
3023 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
3024 if (regs[12] & bits) {
3025 hwconf->baud_base[i] = 921600;
3026 hwconf->MaxCanSetBaudRate[i] = 921600; /* add by Victor Yu. 09-04-2002 */
3027 } else {
3028 hwconf->baud_base[i] = 115200;
3029 hwconf->MaxCanSetBaudRate[i] = 115200; /* add by Victor Yu. 09-04-2002 */
3030 }
3031 }
3032 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
3033 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
3034 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
3035 outb(scratch2, cap + UART_LCR);
3036 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
3037 scratch = inb(cap + UART_IIR);
3038
3039 if (scratch & 0xC0)
3040 hwconf->uart_type = PORT_16550A;
3041 else
3042 hwconf->uart_type = PORT_16450;
3043 if (id == 1)
3044 hwconf->ports = 8;
3045 else
3046 hwconf->ports = 4;
3047 request_region(hwconf->ioaddr[0], 8 * hwconf->ports, "mxser(IO)");
3048 request_region(hwconf->vector, 1, "mxser(vector)");
3049 return hwconf->ports;
3050 }
3051
3052 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
3053 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
3054 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
3055 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
3056 #define EN_CCMD 0x000 /* Chip's command register */
3057 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
3058 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
3059 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
3060 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
3061 #define EN0_DCFG 0x00E /* Data configuration reg WR */
3062 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
3063 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
3064 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
3065 static int mxser_read_register(int port, unsigned short *regs)
3066 {
3067 int i, k, value, id;
3068 unsigned int j;
3069
3070 id = mxser_program_mode(port);
3071 if (id < 0)
3072 return id;
3073 for (i = 0; i < 14; i++) {
3074 k = (i & 0x3F) | 0x180;
3075 for (j = 0x100; j > 0; j >>= 1) {
3076 outb(CHIP_CS, port);
3077 if (k & j) {
3078 outb(CHIP_CS | CHIP_DO, port);
3079 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
3080 } else {
3081 outb(CHIP_CS, port);
3082 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
3083 }
3084 }
3085 (void)inb(port);
3086 value = 0;
3087 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
3088 outb(CHIP_CS, port);
3089 outb(CHIP_CS | CHIP_SK, port);
3090 if (inb(port) & CHIP_DI)
3091 value |= j;
3092 }
3093 regs[i] = value;
3094 outb(0, port);
3095 }
3096 mxser_normal_mode(port);
3097 return id;
3098 }
3099
3100 static int mxser_program_mode(int port)
3101 {
3102 int id, i, j, n;
3103 /* unsigned long flags; */
3104
3105 spin_lock(&gm_lock);
3106 outb(0, port);
3107 outb(0, port);
3108 outb(0, port);
3109 (void)inb(port);
3110 (void)inb(port);
3111 outb(0, port);
3112 (void)inb(port);
3113 /* restore_flags(flags); */
3114 spin_unlock(&gm_lock);
3115
3116 id = inb(port + 1) & 0x1F;
3117 if ((id != C168_ASIC_ID) &&
3118 (id != C104_ASIC_ID) &&
3119 (id != C102_ASIC_ID) &&
3120 (id != CI132_ASIC_ID) &&
3121 (id != CI134_ASIC_ID) &&
3122 (id != CI104J_ASIC_ID))
3123 return -1;
3124 for (i = 0, j = 0; i < 4; i++) {
3125 n = inb(port + 2);
3126 if (n == 'M') {
3127 j = 1;
3128 } else if ((j == 1) && (n == 1)) {
3129 j = 2;
3130 break;
3131 } else
3132 j = 0;
3133 }
3134 if (j != 2)
3135 id = -2;
3136 return id;
3137 }
3138
3139 static void mxser_normal_mode(int port)
3140 {
3141 int i, n;
3142
3143 outb(0xA5, port + 1);
3144 outb(0x80, port + 3);
3145 outb(12, port + 0); /* 9600 bps */
3146 outb(0, port + 1);
3147 outb(0x03, port + 3); /* 8 data bits */
3148 outb(0x13, port + 4); /* loop back mode */
3149 for (i = 0; i < 16; i++) {
3150 n = inb(port + 5);
3151 if ((n & 0x61) == 0x60)
3152 break;
3153 if ((n & 1) == 1)
3154 (void)inb(port);
3155 }
3156 outb(0x00, port + 4);
3157 }
3158
3159 module_init(mxser_module_init);
3160 module_exit(mxser_module_exit);
Linux with added FPC-III support