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Pull sn-features into release branch
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / drivers / char / mxser.c
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/config.h>
40 #include <linux/module.h>
41 #include <linux/version.h>
42 #include <linux/autoconf.h>
43 #include <linux/errno.h>
44 #include <linux/signal.h>
45 #include <linux/sched.h>
46 #include <linux/timer.h>
47 #include <linux/interrupt.h>
48 #include <linux/tty.h>
49 #include <linux/tty_flip.h>
50 #include <linux/serial.h>
51 #include <linux/serial_reg.h>
52 #include <linux/major.h>
53 #include <linux/string.h>
54 #include <linux/fcntl.h>
55 #include <linux/ptrace.h>
56 #include <linux/gfp.h>
57 #include <linux/ioport.h>
58 #include <linux/mm.h>
59 #include <linux/smp_lock.h>
60 #include <linux/delay.h>
61 #include <linux/pci.h>
62
63 #include <asm/system.h>
64 #include <asm/io.h>
65 #include <asm/irq.h>
66 #include <asm/bitops.h>
67 #include <asm/uaccess.h>
68
69 #include "mxser.h"
70
71 #define MXSER_VERSION "1.8"
72 #define MXSERMAJOR 174
73 #define MXSERCUMAJOR 175
74
75 #define MXSER_EVENT_TXLOW 1
76 #define MXSER_EVENT_HANGUP 2
77
78 #define MXSER_BOARDS 4 /* Max. boards */
79 #define MXSER_PORTS 32 /* Max. ports */
80 #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
81 #define MXSER_ISR_PASS_LIMIT 256
82
83 #define MXSER_ERR_IOADDR -1
84 #define MXSER_ERR_IRQ -2
85 #define MXSER_ERR_IRQ_CONFLIT -3
86 #define MXSER_ERR_VECTOR -4
87
88 #define SERIAL_TYPE_NORMAL 1
89 #define SERIAL_TYPE_CALLOUT 2
90
91 #define WAKEUP_CHARS 256
92
93 #define UART_MCR_AFE 0x20
94 #define UART_LSR_SPECIAL 0x1E
95
96 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|IXON|IXOFF))
97
98 #define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? SA_SHIRQ : SA_INTERRUPT)
99
100 #define C168_ASIC_ID 1
101 #define C104_ASIC_ID 2
102 #define C102_ASIC_ID 0xB
103 #define CI132_ASIC_ID 4
104 #define CI134_ASIC_ID 3
105 #define CI104J_ASIC_ID 5
106
107 enum {
108 MXSER_BOARD_C168_ISA = 1,
109 MXSER_BOARD_C104_ISA,
110 MXSER_BOARD_CI104J,
111 MXSER_BOARD_C168_PCI,
112 MXSER_BOARD_C104_PCI,
113 MXSER_BOARD_C102_ISA,
114 MXSER_BOARD_CI132,
115 MXSER_BOARD_CI134,
116 MXSER_BOARD_CP132,
117 MXSER_BOARD_CP114,
118 MXSER_BOARD_CT114,
119 MXSER_BOARD_CP102,
120 MXSER_BOARD_CP104U,
121 MXSER_BOARD_CP168U,
122 MXSER_BOARD_CP132U,
123 MXSER_BOARD_CP134U,
124 MXSER_BOARD_CP104JU,
125 MXSER_BOARD_RC7000,
126 MXSER_BOARD_CP118U,
127 MXSER_BOARD_CP102UL,
128 MXSER_BOARD_CP102U,
129 };
130
131 static char *mxser_brdname[] = {
132 "C168 series",
133 "C104 series",
134 "CI-104J series",
135 "C168H/PCI series",
136 "C104H/PCI series",
137 "C102 series",
138 "CI-132 series",
139 "CI-134 series",
140 "CP-132 series",
141 "CP-114 series",
142 "CT-114 series",
143 "CP-102 series",
144 "CP-104U series",
145 "CP-168U series",
146 "CP-132U series",
147 "CP-134U series",
148 "CP-104JU series",
149 "Moxa UC7000 Serial",
150 "CP-118U series",
151 "CP-102UL series",
152 "CP-102U series",
153 };
154
155 static int mxser_numports[] = {
156 8, // C168-ISA
157 4, // C104-ISA
158 4, // CI104J
159 8, // C168-PCI
160 4, // C104-PCI
161 2, // C102-ISA
162 2, // CI132
163 4, // CI134
164 2, // CP132
165 4, // CP114
166 4, // CT114
167 2, // CP102
168 4, // CP104U
169 8, // CP168U
170 2, // CP132U
171 4, // CP134U
172 4, // CP104JU
173 8, // RC7000
174 8, // CP118U
175 2, // CP102UL
176 2, // CP102U
177 };
178
179 #define UART_TYPE_NUM 2
180
181 static const unsigned int Gmoxa_uart_id[UART_TYPE_NUM] = {
182 MOXA_MUST_MU150_HWID,
183 MOXA_MUST_MU860_HWID
184 };
185
186 // This is only for PCI
187 #define UART_INFO_NUM 3
188 struct mxpciuart_info {
189 int type;
190 int tx_fifo;
191 int rx_fifo;
192 int xmit_fifo_size;
193 int rx_high_water;
194 int rx_trigger;
195 int rx_low_water;
196 long max_baud;
197 };
198
199 static const struct mxpciuart_info Gpci_uart_info[UART_INFO_NUM] = {
200 {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
201 {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
202 {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
203 };
204
205
206 #ifdef CONFIG_PCI
207
208 static struct pci_device_id mxser_pcibrds[] = {
209 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C168_PCI},
210 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C104_PCI},
211 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132},
212 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP114},
213 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CT114},
214 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102},
215 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104U},
216 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP168U},
217 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132U},
218 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP134U},
219 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104JU},
220 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_RC7000},
221 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP118U},
222 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102UL},
223 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102U},
224 {0}
225 };
226
227 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
228
229
230 #endif
231
232 typedef struct _moxa_pci_info {
233 unsigned short busNum;
234 unsigned short devNum;
235 struct pci_dev *pdev; // add by Victor Yu. 06-23-2003
236 } moxa_pci_info;
237
238 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
239 static int ttymajor = MXSERMAJOR;
240 static int calloutmajor = MXSERCUMAJOR;
241 static int verbose = 0;
242
243 /* Variables for insmod */
244
245 MODULE_AUTHOR("Casper Yang");
246 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
247 MODULE_PARM(ioaddr, "1-4i");
248 MODULE_PARM(ttymajor, "i");
249 MODULE_PARM(calloutmajor, "i");
250 MODULE_PARM(verbose, "i");
251 MODULE_LICENSE("GPL");
252
253 struct mxser_log {
254 int tick;
255 unsigned long rxcnt[MXSER_PORTS];
256 unsigned long txcnt[MXSER_PORTS];
257 };
258
259
260 struct mxser_mon {
261 unsigned long rxcnt;
262 unsigned long txcnt;
263 unsigned long up_rxcnt;
264 unsigned long up_txcnt;
265 int modem_status;
266 unsigned char hold_reason;
267 };
268
269 struct mxser_mon_ext {
270 unsigned long rx_cnt[32];
271 unsigned long tx_cnt[32];
272 unsigned long up_rxcnt[32];
273 unsigned long up_txcnt[32];
274 int modem_status[32];
275
276 long baudrate[32];
277 int databits[32];
278 int stopbits[32];
279 int parity[32];
280 int flowctrl[32];
281 int fifo[32];
282 int iftype[32];
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 long session; /* Session of opening process */
325 long pgrp; /* pgrp of opening process */
326 unsigned char *xmit_buf;
327 int xmit_head;
328 int xmit_tail;
329 int xmit_cnt;
330 struct work_struct tqueue;
331 struct termios normal_termios;
332 struct termios callout_termios;
333 wait_queue_head_t open_wait;
334 wait_queue_head_t close_wait;
335 wait_queue_head_t delta_msr_wait;
336 struct async_icount icount; /* kernel counters for the 4 input interrupts */
337 int timeout;
338 int IsMoxaMustChipFlag; // add by Victor Yu. 08-30-2002
339 int MaxCanSetBaudRate; // add by Victor Yu. 09-04-2002
340 int opmode_ioaddr; // add by Victor Yu. 01-05-2004
341 unsigned char stop_rx;
342 unsigned char ldisc_stop_rx;
343 long realbaud;
344 struct mxser_mon mon_data;
345 unsigned char err_shadow;
346 spinlock_t slock;
347 };
348
349
350 struct mxser_mstatus {
351 tcflag_t cflag;
352 int cts;
353 int dsr;
354 int ri;
355 int dcd;
356 };
357
358 static struct mxser_mstatus GMStatus[MXSER_PORTS];
359
360 static int mxserBoardCAP[MXSER_BOARDS] = {
361 0, 0, 0, 0
362 /* 0x180, 0x280, 0x200, 0x320 */
363 };
364
365 static struct tty_driver *mxvar_sdriver;
366 static struct mxser_struct mxvar_table[MXSER_PORTS];
367 static struct tty_struct *mxvar_tty[MXSER_PORTS + 1];
368 static struct termios *mxvar_termios[MXSER_PORTS + 1];
369 static struct termios *mxvar_termios_locked[MXSER_PORTS + 1];
370 static struct mxser_log mxvar_log;
371 static int mxvar_diagflag;
372 static unsigned char mxser_msr[MXSER_PORTS + 1];
373 static struct mxser_mon_ext mon_data_ext;
374 static int mxser_set_baud_method[MXSER_PORTS + 1];
375 static spinlock_t gm_lock;
376
377 /*
378 * This is used to figure out the divisor speeds and the timeouts
379 */
380
381 static struct mxser_hwconf mxsercfg[MXSER_BOARDS];
382
383 /*
384 * static functions:
385 */
386
387 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf);
388 static int mxser_init(void);
389
390 //static void mxser_poll(unsigned long);
391 static int mxser_get_ISA_conf(int, struct mxser_hwconf *);
392 static int mxser_get_PCI_conf(int, int, int, struct mxser_hwconf *);
393 static void mxser_do_softint(void *);
394 static int mxser_open(struct tty_struct *, struct file *);
395 static void mxser_close(struct tty_struct *, struct file *);
396 static int mxser_write(struct tty_struct *, const unsigned char *, int);
397 static int mxser_write_room(struct tty_struct *);
398 static void mxser_flush_buffer(struct tty_struct *);
399 static int mxser_chars_in_buffer(struct tty_struct *);
400 static void mxser_flush_chars(struct tty_struct *);
401 static void mxser_put_char(struct tty_struct *, unsigned char);
402 static int mxser_ioctl(struct tty_struct *, struct file *, uint, ulong);
403 static int mxser_ioctl_special(unsigned int, void __user *);
404 static void mxser_throttle(struct tty_struct *);
405 static void mxser_unthrottle(struct tty_struct *);
406 static void mxser_set_termios(struct tty_struct *, struct termios *);
407 static void mxser_stop(struct tty_struct *);
408 static void mxser_start(struct tty_struct *);
409 static void mxser_hangup(struct tty_struct *);
410 static void mxser_rs_break(struct tty_struct *, int);
411 static irqreturn_t mxser_interrupt(int, void *, struct pt_regs *);
412 static void mxser_receive_chars(struct mxser_struct *, int *);
413 static void mxser_transmit_chars(struct mxser_struct *);
414 static void mxser_check_modem_status(struct mxser_struct *, int);
415 static int mxser_block_til_ready(struct tty_struct *, struct file *, struct mxser_struct *);
416 static int mxser_startup(struct mxser_struct *);
417 static void mxser_shutdown(struct mxser_struct *);
418 static int mxser_change_speed(struct mxser_struct *, struct termios *old_termios);
419 static int mxser_get_serial_info(struct mxser_struct *, struct serial_struct __user *);
420 static int mxser_set_serial_info(struct mxser_struct *, struct serial_struct __user *);
421 static int mxser_get_lsr_info(struct mxser_struct *, unsigned int __user *);
422 static void mxser_send_break(struct mxser_struct *, int);
423 static int mxser_tiocmget(struct tty_struct *, struct file *);
424 static int mxser_tiocmset(struct tty_struct *, struct file *, unsigned int, unsigned int);
425 static int mxser_set_baud(struct mxser_struct *info, long newspd);
426 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout);
427
428 static void mxser_startrx(struct tty_struct *tty);
429 static void mxser_stoprx(struct tty_struct *tty);
430
431
432 static int CheckIsMoxaMust(int io)
433 {
434 u8 oldmcr, hwid;
435 int i;
436
437 outb(0, io + UART_LCR);
438 DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
439 oldmcr = inb(io + UART_MCR);
440 outb(0, io + UART_MCR);
441 SET_MOXA_MUST_XON1_VALUE(io, 0x11);
442 if ((hwid = inb(io + UART_MCR)) != 0) {
443 outb(oldmcr, io + UART_MCR);
444 return (MOXA_OTHER_UART);
445 }
446
447 GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
448 for (i = 0; i < UART_TYPE_NUM; i++) {
449 if (hwid == Gmoxa_uart_id[i])
450 return (int) hwid;
451 }
452 return MOXA_OTHER_UART;
453 }
454
455 // above is modified by Victor Yu. 08-15-2002
456
457 static struct tty_operations mxser_ops = {
458 .open = mxser_open,
459 .close = mxser_close,
460 .write = mxser_write,
461 .put_char = mxser_put_char,
462 .flush_chars = mxser_flush_chars,
463 .write_room = mxser_write_room,
464 .chars_in_buffer = mxser_chars_in_buffer,
465 .flush_buffer = mxser_flush_buffer,
466 .ioctl = mxser_ioctl,
467 .throttle = mxser_throttle,
468 .unthrottle = mxser_unthrottle,
469 .set_termios = mxser_set_termios,
470 .stop = mxser_stop,
471 .start = mxser_start,
472 .hangup = mxser_hangup,
473 .tiocmget = mxser_tiocmget,
474 .tiocmset = mxser_tiocmset,
475 };
476
477 /*
478 * The MOXA Smartio/Industio serial driver boot-time initialization code!
479 */
480
481 static int __init mxser_module_init(void)
482 {
483 int ret;
484
485 if (verbose)
486 printk(KERN_DEBUG "Loading module mxser ...\n");
487 ret = mxser_init();
488 if (verbose)
489 printk(KERN_DEBUG "Done.\n");
490 return ret;
491 }
492
493 static void __exit mxser_module_exit(void)
494 {
495 int i, err = 0;
496
497 if (verbose)
498 printk(KERN_DEBUG "Unloading module mxser ...\n");
499
500 if ((err |= tty_unregister_driver(mxvar_sdriver)))
501 printk(KERN_ERR "Couldn't unregister MOXA Smartio/Industio family serial driver\n");
502
503 for (i = 0; i < MXSER_BOARDS; i++) {
504 struct pci_dev *pdev;
505
506 if (mxsercfg[i].board_type == -1)
507 continue;
508 else {
509 pdev = mxsercfg[i].pciInfo.pdev;
510 free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
511 if (pdev != NULL) { //PCI
512 release_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2));
513 release_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3));
514 } else {
515 release_region(mxsercfg[i].ioaddr[0], 8 * mxsercfg[i].ports);
516 release_region(mxsercfg[i].vector, 1);
517 }
518 }
519 }
520 if (verbose)
521 printk(KERN_DEBUG "Done.\n");
522
523 }
524
525 static void process_txrx_fifo(struct mxser_struct *info)
526 {
527 int i;
528
529 if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
530 info->rx_trigger = 1;
531 info->rx_high_water = 1;
532 info->rx_low_water = 1;
533 info->xmit_fifo_size = 1;
534 } else {
535 for (i = 0; i < UART_INFO_NUM; i++) {
536 if (info->IsMoxaMustChipFlag == Gpci_uart_info[i].type) {
537 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
538 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
539 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
540 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
541 break;
542 }
543 }
544 }
545 }
546
547 static int mxser_initbrd(int board, struct mxser_hwconf *hwconf)
548 {
549 struct mxser_struct *info;
550 int retval;
551 int i, n;
552
553 n = board * MXSER_PORTS_PER_BOARD;
554 info = &mxvar_table[n];
555 /*if (verbose) */ {
556 printk(KERN_DEBUG " ttyM%d - ttyM%d ", n, n + hwconf->ports - 1);
557 printk(" max. baud rate = %d bps.\n", hwconf->MaxCanSetBaudRate[0]);
558 }
559
560 for (i = 0; i < hwconf->ports; i++, n++, info++) {
561 info->port = n;
562 info->base = hwconf->ioaddr[i];
563 info->irq = hwconf->irq;
564 info->vector = hwconf->vector;
565 info->vectormask = hwconf->vector_mask;
566 info->opmode_ioaddr = hwconf->opmode_ioaddr[i]; // add by Victor Yu. 01-05-2004
567 info->stop_rx = 0;
568 info->ldisc_stop_rx = 0;
569
570 info->IsMoxaMustChipFlag = hwconf->IsMoxaMustChipFlag;
571 //Enhance mode enabled here
572 if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
573 ENABLE_MOXA_MUST_ENCHANCE_MODE(info->base);
574 }
575
576 info->flags = ASYNC_SHARE_IRQ;
577 info->type = hwconf->uart_type;
578 info->baud_base = hwconf->baud_base[i];
579
580 info->MaxCanSetBaudRate = hwconf->MaxCanSetBaudRate[i];
581
582 process_txrx_fifo(info);
583
584
585 info->custom_divisor = hwconf->baud_base[i] * 16;
586 info->close_delay = 5 * HZ / 10;
587 info->closing_wait = 30 * HZ;
588 INIT_WORK(&info->tqueue, mxser_do_softint, info);
589 info->normal_termios = mxvar_sdriver->init_termios;
590 init_waitqueue_head(&info->open_wait);
591 init_waitqueue_head(&info->close_wait);
592 init_waitqueue_head(&info->delta_msr_wait);
593 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
594 info->err_shadow = 0;
595 spin_lock_init(&info->slock);
596 }
597 /*
598 * Allocate the IRQ if necessary
599 */
600
601
602 /* before set INT ISR, disable all int */
603 for (i = 0; i < hwconf->ports; i++) {
604 outb(inb(hwconf->ioaddr[i] + UART_IER) & 0xf0, hwconf->ioaddr[i] + UART_IER);
605 }
606
607 n = board * MXSER_PORTS_PER_BOARD;
608 info = &mxvar_table[n];
609
610 retval = request_irq(hwconf->irq, mxser_interrupt, IRQ_T(info), "mxser", info);
611 if (retval) {
612 printk(KERN_ERR "Board %d: %s", board, mxser_brdname[hwconf->board_type - 1]);
613 printk(" Request irq fail,IRQ (%d) may be conflit with another device.\n", info->irq);
614 return retval;
615 }
616 return 0;
617 }
618
619
620 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf)
621 {
622 mxsercfg[board] = *hwconf;
623 }
624
625 #ifdef CONFIG_PCI
626 static int mxser_get_PCI_conf(int busnum, int devnum, int board_type, struct mxser_hwconf *hwconf)
627 {
628 int i, j;
629 // unsigned int val;
630 unsigned int ioaddress;
631 struct pci_dev *pdev = hwconf->pciInfo.pdev;
632
633 //io address
634 hwconf->board_type = board_type;
635 hwconf->ports = mxser_numports[board_type - 1];
636 ioaddress = pci_resource_start(pdev, 2);
637 request_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2), "mxser(IO)");
638
639 for (i = 0; i < hwconf->ports; i++) {
640 hwconf->ioaddr[i] = ioaddress + 8 * i;
641 }
642
643 //vector
644 ioaddress = pci_resource_start(pdev, 3);
645 request_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3), "mxser(vector)");
646 hwconf->vector = ioaddress;
647
648 //irq
649 hwconf->irq = hwconf->pciInfo.pdev->irq;
650
651 hwconf->IsMoxaMustChipFlag = CheckIsMoxaMust(hwconf->ioaddr[0]);
652 hwconf->uart_type = PORT_16550A;
653 hwconf->vector_mask = 0;
654
655
656 for (i = 0; i < hwconf->ports; i++) {
657 for (j = 0; j < UART_INFO_NUM; j++) {
658 if (Gpci_uart_info[j].type == hwconf->IsMoxaMustChipFlag) {
659 hwconf->MaxCanSetBaudRate[i] = Gpci_uart_info[j].max_baud;
660
661 //exception....CP-102
662 if (board_type == MXSER_BOARD_CP102)
663 hwconf->MaxCanSetBaudRate[i] = 921600;
664 break;
665 }
666 }
667 }
668
669 if (hwconf->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID) {
670 for (i = 0; i < hwconf->ports; i++) {
671 if (i < 4)
672 hwconf->opmode_ioaddr[i] = ioaddress + 4;
673 else
674 hwconf->opmode_ioaddr[i] = ioaddress + 0x0c;
675 }
676 outb(0, ioaddress + 4); // default set to RS232 mode
677 outb(0, ioaddress + 0x0c); //default set to RS232 mode
678 }
679
680 for (i = 0; i < hwconf->ports; i++) {
681 hwconf->vector_mask |= (1 << i);
682 hwconf->baud_base[i] = 921600;
683 }
684 return (0);
685 }
686 #endif
687
688 static int mxser_init(void)
689 {
690 int i, m, retval, b, n;
691 int ret1;
692 struct pci_dev *pdev = NULL;
693 int index;
694 unsigned char busnum, devnum;
695 struct mxser_hwconf hwconf;
696
697 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
698 if (!mxvar_sdriver)
699 return -ENOMEM;
700 spin_lock_init(&gm_lock);
701
702 for (i = 0; i < MXSER_BOARDS; i++) {
703 mxsercfg[i].board_type = -1;
704 }
705
706 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n", MXSER_VERSION);
707
708 /* Initialize the tty_driver structure */
709 memset(mxvar_sdriver, 0, sizeof(struct tty_driver));
710 mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
711 mxvar_sdriver->name = "ttyM";
712 mxvar_sdriver->major = ttymajor;
713 mxvar_sdriver->minor_start = 0;
714 mxvar_sdriver->num = MXSER_PORTS + 1;
715 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
716 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
717 mxvar_sdriver->init_termios = tty_std_termios;
718 mxvar_sdriver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
719 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW;
720 tty_set_operations(mxvar_sdriver, &mxser_ops);
721 mxvar_sdriver->ttys = mxvar_tty;
722 mxvar_sdriver->termios = mxvar_termios;
723 mxvar_sdriver->termios_locked = mxvar_termios_locked;
724
725 mxvar_sdriver->open = mxser_open;
726 mxvar_sdriver->close = mxser_close;
727 mxvar_sdriver->write = mxser_write;
728 mxvar_sdriver->put_char = mxser_put_char;
729 mxvar_sdriver->flush_chars = mxser_flush_chars;
730 mxvar_sdriver->write_room = mxser_write_room;
731 mxvar_sdriver->chars_in_buffer = mxser_chars_in_buffer;
732 mxvar_sdriver->flush_buffer = mxser_flush_buffer;
733 mxvar_sdriver->ioctl = mxser_ioctl;
734 mxvar_sdriver->throttle = mxser_throttle;
735 mxvar_sdriver->unthrottle = mxser_unthrottle;
736 mxvar_sdriver->set_termios = mxser_set_termios;
737 mxvar_sdriver->stop = mxser_stop;
738 mxvar_sdriver->start = mxser_start;
739 mxvar_sdriver->hangup = mxser_hangup;
740 mxvar_sdriver->break_ctl = mxser_rs_break;
741 mxvar_sdriver->wait_until_sent = mxser_wait_until_sent;
742
743 mxvar_diagflag = 0;
744 memset(mxvar_table, 0, MXSER_PORTS * sizeof(struct mxser_struct));
745 memset(&mxvar_log, 0, sizeof(struct mxser_log));
746
747 memset(&mxser_msr, 0, sizeof(unsigned char) * (MXSER_PORTS + 1));
748 memset(&mon_data_ext, 0, sizeof(struct mxser_mon_ext));
749 memset(&mxser_set_baud_method, 0, sizeof(int) * (MXSER_PORTS + 1));
750 memset(&hwconf, 0, sizeof(struct mxser_hwconf));
751
752 m = 0;
753 /* Start finding ISA boards here */
754 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
755 int cap;
756 if (!(cap = mxserBoardCAP[b]))
757 continue;
758
759 retval = mxser_get_ISA_conf(cap, &hwconf);
760
761 if (retval != 0)
762 printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n", mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
763
764 if (retval <= 0) {
765 if (retval == MXSER_ERR_IRQ)
766 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
767 else if (retval == MXSER_ERR_IRQ_CONFLIT)
768 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
769 else if (retval == MXSER_ERR_VECTOR)
770 printk(KERN_ERR "Invalid interrupt vector,board not configured\n");
771 else if (retval == MXSER_ERR_IOADDR)
772 printk(KERN_ERR "Invalid I/O address,board not configured\n");
773
774 continue;
775 }
776
777 hwconf.pciInfo.busNum = 0;
778 hwconf.pciInfo.devNum = 0;
779 hwconf.pciInfo.pdev = NULL;
780
781 mxser_getcfg(m, &hwconf);
782 //init mxsercfg first, or mxsercfg data is not correct on ISR.
783 //mxser_initbrd will hook ISR.
784 if (mxser_initbrd(m, &hwconf) < 0)
785 continue;
786
787
788 m++;
789 }
790
791 /* Start finding ISA boards from module arg */
792 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
793 int cap;
794 if (!(cap = ioaddr[b]))
795 continue;
796
797 retval = mxser_get_ISA_conf(cap, &hwconf);
798
799 if (retval != 0)
800 printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n", mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
801
802 if (retval <= 0) {
803 if (retval == MXSER_ERR_IRQ)
804 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
805 else if (retval == MXSER_ERR_IRQ_CONFLIT)
806 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
807 else if (retval == MXSER_ERR_VECTOR)
808 printk(KERN_ERR "Invalid interrupt vector,board not configured\n");
809 else if (retval == MXSER_ERR_IOADDR)
810 printk(KERN_ERR "Invalid I/O address,board not configured\n");
811
812 continue;
813 }
814
815 hwconf.pciInfo.busNum = 0;
816 hwconf.pciInfo.devNum = 0;
817 hwconf.pciInfo.pdev = NULL;
818
819 mxser_getcfg(m, &hwconf);
820 //init mxsercfg first, or mxsercfg data is not correct on ISR.
821 //mxser_initbrd will hook ISR.
822 if (mxser_initbrd(m, &hwconf) < 0)
823 continue;
824
825 m++;
826 }
827
828 /* start finding PCI board here */
829 #ifdef CONFIG_PCI
830 n = (sizeof(mxser_pcibrds) / sizeof(mxser_pcibrds[0])) - 1;
831 index = 0;
832 b = 0;
833 while (b < n) {
834 pdev = pci_find_device(mxser_pcibrds[b].vendor, mxser_pcibrds[b].device, pdev);
835 if (pdev == NULL) {
836 b++;
837 continue;
838 }
839 hwconf.pciInfo.busNum = busnum = pdev->bus->number;
840 hwconf.pciInfo.devNum = devnum = PCI_SLOT(pdev->devfn) << 3;
841 hwconf.pciInfo.pdev = pdev;
842 printk(KERN_INFO "Found MOXA %s board(BusNo=%d,DevNo=%d)\n", mxser_brdname[(int) (mxser_pcibrds[b].driver_data) - 1], busnum, devnum >> 3);
843 index++;
844 if (m >= MXSER_BOARDS) {
845 printk(KERN_ERR "Too many Smartio/Industio family boards find (maximum %d),board not configured\n", MXSER_BOARDS);
846 } else {
847 if (pci_enable_device(pdev)) {
848 printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
849 continue;
850 }
851 retval = mxser_get_PCI_conf(busnum, devnum, (int) mxser_pcibrds[b].driver_data, &hwconf);
852 if (retval < 0) {
853 if (retval == MXSER_ERR_IRQ)
854 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
855 else if (retval == MXSER_ERR_IRQ_CONFLIT)
856 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
857 else if (retval == MXSER_ERR_VECTOR)
858 printk(KERN_ERR "Invalid interrupt vector,board not configured\n");
859 else if (retval == MXSER_ERR_IOADDR)
860 printk(KERN_ERR "Invalid I/O address,board not configured\n");
861 continue;
862 }
863 mxser_getcfg(m, &hwconf);
864 //init mxsercfg first, or mxsercfg data is not correct on ISR.
865 //mxser_initbrd will hook ISR.
866 if (mxser_initbrd(m, &hwconf) < 0)
867 continue;
868 m++;
869 }
870 }
871 #endif
872
873 ret1 = 0;
874 if (!(ret1 = tty_register_driver(mxvar_sdriver))) {
875 return 0;
876 } else
877 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family driver !\n");
878
879
880 if (ret1) {
881 for (i = 0; i < MXSER_BOARDS; i++) {
882 if (mxsercfg[i].board_type == -1)
883 continue;
884 else {
885 free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
886 //todo: release io, vector
887 }
888 }
889 return -1;
890 }
891
892 return (0);
893 }
894
895 static void mxser_do_softint(void *private_)
896 {
897 struct mxser_struct *info = (struct mxser_struct *) private_;
898 struct tty_struct *tty;
899
900 tty = info->tty;
901
902 if (tty) {
903 if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
904 tty_wakeup(tty);
905 if (test_and_clear_bit(MXSER_EVENT_HANGUP, &info->event))
906 tty_hangup(tty);
907 }
908 }
909
910 static unsigned char mxser_get_msr(int baseaddr, int mode, int port, struct mxser_struct *info)
911 {
912 unsigned char status = 0;
913
914 status = inb(baseaddr + UART_MSR);
915
916 mxser_msr[port] &= 0x0F;
917 mxser_msr[port] |= status;
918 status = mxser_msr[port];
919 if (mode)
920 mxser_msr[port] = 0;
921
922 return status;
923 }
924
925 /*
926 * This routine is called whenever a serial port is opened. It
927 * enables interrupts for a serial port, linking in its async structure into
928 * the IRQ chain. It also performs the serial-specific
929 * initialization for the tty structure.
930 */
931 static int mxser_open(struct tty_struct *tty, struct file *filp)
932 {
933 struct mxser_struct *info;
934 int retval, line;
935
936 line = tty->index;
937 if (line == MXSER_PORTS)
938 return 0;
939 if (line < 0 || line > MXSER_PORTS)
940 return -ENODEV;
941 info = mxvar_table + line;
942 if (!info->base)
943 return (-ENODEV);
944
945 tty->driver_data = info;
946 info->tty = tty;
947 /*
948 * Start up serial port
949 */
950 retval = mxser_startup(info);
951 if (retval)
952 return (retval);
953
954 retval = mxser_block_til_ready(tty, filp, info);
955 if (retval)
956 return (retval);
957
958 info->count++;
959
960 if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
961 if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
962 *tty->termios = info->normal_termios;
963 else
964 *tty->termios = info->callout_termios;
965 mxser_change_speed(info, NULL);
966 }
967
968 info->session = current->signal->session;
969 info->pgrp = process_group(current);
970 clear_bit(TTY_DONT_FLIP, &tty->flags);
971
972 //status = mxser_get_msr(info->base, 0, info->port);
973 //mxser_check_modem_status(info, status);
974
975 /* unmark here for very high baud rate (ex. 921600 bps) used
976 */
977 tty->low_latency = 1;
978 return 0;
979 }
980
981 /*
982 * This routine is called when the serial port gets closed. First, we
983 * wait for the last remaining data to be sent. Then, we unlink its
984 * async structure from the interrupt chain if necessary, and we free
985 * that IRQ if nothing is left in the chain.
986 */
987 static void mxser_close(struct tty_struct *tty, struct file *filp)
988 {
989 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
990
991 unsigned long timeout;
992 unsigned long flags;
993 struct tty_ldisc *ld;
994
995 if (tty->index == MXSER_PORTS)
996 return;
997 if (!info)
998 BUG();
999
1000 spin_lock_irqsave(&info->slock, flags);
1001
1002 if (tty_hung_up_p(filp)) {
1003 spin_unlock_irqrestore(&info->slock, flags);
1004 return;
1005 }
1006 if ((tty->count == 1) && (info->count != 1)) {
1007 /*
1008 * Uh, oh. tty->count is 1, which means that the tty
1009 * structure will be freed. Info->count should always
1010 * be one in these conditions. If it's greater than
1011 * one, we've got real problems, since it means the
1012 * serial port won't be shutdown.
1013 */
1014 printk(KERN_ERR "mxser_close: bad serial port count; tty->count is 1, " "info->count is %d\n", info->count);
1015 info->count = 1;
1016 }
1017 if (--info->count < 0) {
1018 printk(KERN_ERR "mxser_close: bad serial port count for ttys%d: %d\n", info->port, info->count);
1019 info->count = 0;
1020 }
1021 if (info->count) {
1022 spin_unlock_irqrestore(&info->slock, flags);
1023 return;
1024 }
1025 info->flags |= ASYNC_CLOSING;
1026 spin_unlock_irqrestore(&info->slock, flags);
1027 /*
1028 * Save the termios structure, since this port may have
1029 * separate termios for callout and dialin.
1030 */
1031 if (info->flags & ASYNC_NORMAL_ACTIVE)
1032 info->normal_termios = *tty->termios;
1033 /*
1034 * Now we wait for the transmit buffer to clear; and we notify
1035 * the line discipline to only process XON/XOFF characters.
1036 */
1037 tty->closing = 1;
1038 if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1039 tty_wait_until_sent(tty, info->closing_wait);
1040 /*
1041 * At this point we stop accepting input. To do this, we
1042 * disable the receive line status interrupts, and tell the
1043 * interrupt driver to stop checking the data ready bit in the
1044 * line status register.
1045 */
1046 info->IER &= ~UART_IER_RLSI;
1047 if (info->IsMoxaMustChipFlag)
1048 info->IER &= ~MOXA_MUST_RECV_ISR;
1049 /* by William
1050 info->read_status_mask &= ~UART_LSR_DR;
1051 */
1052 if (info->flags & ASYNC_INITIALIZED) {
1053 outb(info->IER, info->base + UART_IER);
1054 /*
1055 * Before we drop DTR, make sure the UART transmitter
1056 * has completely drained; this is especially
1057 * important if there is a transmit FIFO!
1058 */
1059 timeout = jiffies + HZ;
1060 while (!(inb(info->base + UART_LSR) & UART_LSR_TEMT)) {
1061 schedule_timeout_interruptible(5);
1062 if (time_after(jiffies, timeout))
1063 break;
1064 }
1065 }
1066 mxser_shutdown(info);
1067
1068 if (tty->driver->flush_buffer)
1069 tty->driver->flush_buffer(tty);
1070
1071 ld = tty_ldisc_ref(tty);
1072 if (ld) {
1073 if(ld->flush_buffer)
1074 ld->flush_buffer(tty);
1075 tty_ldisc_deref(ld);
1076 }
1077
1078 tty->closing = 0;
1079 info->event = 0;
1080 info->tty = NULL;
1081 if (info->blocked_open) {
1082 if (info->close_delay)
1083 schedule_timeout_interruptible(info->close_delay);
1084 wake_up_interruptible(&info->open_wait);
1085 }
1086
1087 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1088 wake_up_interruptible(&info->close_wait);
1089
1090 }
1091
1092 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1093 {
1094 int c, total = 0;
1095 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1096 unsigned long flags;
1097
1098 if (!tty || !info->xmit_buf)
1099 return (0);
1100
1101 while (1) {
1102 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, SERIAL_XMIT_SIZE - info->xmit_head));
1103 if (c <= 0)
1104 break;
1105
1106 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1107 spin_lock_irqsave(&info->slock, flags);
1108 info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE - 1);
1109 info->xmit_cnt += c;
1110 spin_unlock_irqrestore(&info->slock, flags);
1111
1112 buf += c;
1113 count -= c;
1114 total += c;
1115
1116 }
1117
1118 if (info->xmit_cnt && !tty->stopped && !(info->IER & UART_IER_THRI)) {
1119 if (!tty->hw_stopped || (info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
1120 spin_lock_irqsave(&info->slock, flags);
1121 info->IER |= UART_IER_THRI;
1122 outb(info->IER, info->base + UART_IER);
1123 spin_unlock_irqrestore(&info->slock, flags);
1124 }
1125 }
1126 return total;
1127 }
1128
1129 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1130 {
1131 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1132 unsigned long flags;
1133
1134 if (!tty || !info->xmit_buf)
1135 return;
1136
1137 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1138 return;
1139
1140 spin_lock_irqsave(&info->slock, flags);
1141 info->xmit_buf[info->xmit_head++] = ch;
1142 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1143 info->xmit_cnt++;
1144 spin_unlock_irqrestore(&info->slock, flags);
1145 if (!tty->stopped && !(info->IER & UART_IER_THRI)) {
1146 if (!tty->hw_stopped || (info->type == PORT_16550A) || info->IsMoxaMustChipFlag) {
1147 spin_lock_irqsave(&info->slock, flags);
1148 info->IER |= UART_IER_THRI;
1149 outb(info->IER, info->base + UART_IER);
1150 spin_unlock_irqrestore(&info->slock, flags);
1151 }
1152 }
1153 }
1154
1155
1156 static void mxser_flush_chars(struct tty_struct *tty)
1157 {
1158 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1159 unsigned long flags;
1160
1161 if (info->xmit_cnt <= 0 || tty->stopped || !info->xmit_buf || (tty->hw_stopped && (info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)))
1162 return;
1163
1164 spin_lock_irqsave(&info->slock, flags);
1165
1166 info->IER |= UART_IER_THRI;
1167 outb(info->IER, info->base + UART_IER);
1168
1169 spin_unlock_irqrestore(&info->slock, flags);
1170 }
1171
1172 static int mxser_write_room(struct tty_struct *tty)
1173 {
1174 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1175 int ret;
1176
1177 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1178 if (ret < 0)
1179 ret = 0;
1180 return (ret);
1181 }
1182
1183 static int mxser_chars_in_buffer(struct tty_struct *tty)
1184 {
1185 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1186 return info->xmit_cnt;
1187 }
1188
1189 static void mxser_flush_buffer(struct tty_struct *tty)
1190 {
1191 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1192 char fcr;
1193 unsigned long flags;
1194
1195
1196 spin_lock_irqsave(&info->slock, flags);
1197 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1198
1199 /* below added by shinhay */
1200 fcr = inb(info->base + UART_FCR);
1201 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
1202 outb(fcr, info->base + UART_FCR);
1203
1204 spin_unlock_irqrestore(&info->slock, flags);
1205 /* above added by shinhay */
1206
1207 wake_up_interruptible(&tty->write_wait);
1208 if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
1209 (tty->ldisc.write_wakeup) (tty);
1210 }
1211
1212 static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1213 {
1214 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1215 int retval;
1216 struct async_icount cprev, cnow; /* kernel counter temps */
1217 struct serial_icounter_struct __user *p_cuser;
1218 unsigned long templ;
1219 unsigned long flags;
1220 void __user *argp = (void __user *)arg;
1221
1222 if (tty->index == MXSER_PORTS)
1223 return (mxser_ioctl_special(cmd, argp));
1224
1225 // following add by Victor Yu. 01-05-2004
1226 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1227 int opmode, p;
1228 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1229 int shiftbit;
1230 unsigned char val, mask;
1231
1232 p = info->port % 4;
1233 if (cmd == MOXA_SET_OP_MODE) {
1234 if (get_user(opmode, (int __user *) argp))
1235 return -EFAULT;
1236 if (opmode != RS232_MODE && opmode != RS485_2WIRE_MODE && opmode != RS422_MODE && opmode != RS485_4WIRE_MODE)
1237 return -EFAULT;
1238 mask = ModeMask[p];
1239 shiftbit = p * 2;
1240 val = inb(info->opmode_ioaddr);
1241 val &= mask;
1242 val |= (opmode << shiftbit);
1243 outb(val, info->opmode_ioaddr);
1244 } else {
1245 shiftbit = p * 2;
1246 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1247 opmode &= OP_MODE_MASK;
1248 if (copy_to_user(argp, &opmode, sizeof(int)))
1249 return -EFAULT;
1250 }
1251 return 0;
1252 }
1253 // above add by Victor Yu. 01-05-2004
1254
1255 if ((cmd != TIOCGSERIAL) && (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1256 if (tty->flags & (1 << TTY_IO_ERROR))
1257 return (-EIO);
1258 }
1259 switch (cmd) {
1260 case TCSBRK: /* SVID version: non-zero arg --> no break */
1261 retval = tty_check_change(tty);
1262 if (retval)
1263 return (retval);
1264 tty_wait_until_sent(tty, 0);
1265 if (!arg)
1266 mxser_send_break(info, HZ / 4); /* 1/4 second */
1267 return (0);
1268 case TCSBRKP: /* support for POSIX tcsendbreak() */
1269 retval = tty_check_change(tty);
1270 if (retval)
1271 return (retval);
1272 tty_wait_until_sent(tty, 0);
1273 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1274 return (0);
1275 case TIOCGSOFTCAR:
1276 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *) argp);
1277 case TIOCSSOFTCAR:
1278 if (get_user(templ, (unsigned long __user *) argp))
1279 return -EFAULT;
1280 arg = templ;
1281 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1282 return (0);
1283 case TIOCGSERIAL:
1284 return mxser_get_serial_info(info, argp);
1285 case TIOCSSERIAL:
1286 return mxser_set_serial_info(info, argp);
1287 case TIOCSERGETLSR: /* Get line status register */
1288 return mxser_get_lsr_info(info, argp);
1289 /*
1290 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1291 * - mask passed in arg for lines of interest
1292 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1293 * Caller should use TIOCGICOUNT to see which one it was
1294 */
1295 case TIOCMIWAIT:{
1296 DECLARE_WAITQUEUE(wait, current);
1297 int ret;
1298 spin_lock_irqsave(&info->slock, flags);
1299 cprev = info->icount; /* note the counters on entry */
1300 spin_unlock_irqrestore(&info->slock, flags);
1301
1302 add_wait_queue(&info->delta_msr_wait, &wait);
1303 while (1) {
1304 spin_lock_irqsave(&info->slock, flags);
1305 cnow = info->icount; /* atomic copy */
1306 spin_unlock_irqrestore(&info->slock, flags);
1307
1308 set_current_state(TASK_INTERRUPTIBLE);
1309 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
1310 ret = 0;
1311 break;
1312 }
1313 /* see if a signal did it */
1314 if (signal_pending(current)) {
1315 ret = -ERESTARTSYS;
1316 break;
1317 }
1318 cprev = cnow;
1319 }
1320 current->state = TASK_RUNNING;
1321 remove_wait_queue(&info->delta_msr_wait, &wait);
1322 break;
1323 }
1324 /* NOTREACHED */
1325 /*
1326 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1327 * Return: write counters to the user passed counter struct
1328 * NB: both 1->0 and 0->1 transitions are counted except for
1329 * RI where only 0->1 is counted.
1330 */
1331 case TIOCGICOUNT:
1332 spin_lock_irqsave(&info->slock, flags);
1333 cnow = info->icount;
1334 spin_unlock_irqrestore(&info->slock, flags);
1335 p_cuser = argp;
1336 /* modified by casper 1/11/2000 */
1337 if (put_user(cnow.frame, &p_cuser->frame))
1338 return -EFAULT;
1339 if (put_user(cnow.brk, &p_cuser->brk))
1340 return -EFAULT;
1341 if (put_user(cnow.overrun, &p_cuser->overrun))
1342 return -EFAULT;
1343 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1344 return -EFAULT;
1345 if (put_user(cnow.parity, &p_cuser->parity))
1346 return -EFAULT;
1347 if (put_user(cnow.rx, &p_cuser->rx))
1348 return -EFAULT;
1349 if (put_user(cnow.tx, &p_cuser->tx))
1350 return -EFAULT;
1351 put_user(cnow.cts, &p_cuser->cts);
1352 put_user(cnow.dsr, &p_cuser->dsr);
1353 put_user(cnow.rng, &p_cuser->rng);
1354 put_user(cnow.dcd, &p_cuser->dcd);
1355
1356 /* */
1357 return 0;
1358 case MOXA_HighSpeedOn:
1359 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *) argp);
1360
1361 case MOXA_SDS_RSTICOUNTER:{
1362 info->mon_data.rxcnt = 0;
1363 info->mon_data.txcnt = 0;
1364 return 0;
1365 }
1366 // (above) added by James.
1367 case MOXA_ASPP_SETBAUD:{
1368 long baud;
1369 if (get_user(baud, (long __user *) argp))
1370 return -EFAULT;
1371 mxser_set_baud(info, baud);
1372 return 0;
1373 }
1374 case MOXA_ASPP_GETBAUD:
1375 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1376 return -EFAULT;
1377
1378 return 0;
1379
1380 case MOXA_ASPP_OQUEUE:{
1381 int len, lsr;
1382
1383 len = mxser_chars_in_buffer(tty);
1384
1385 lsr = inb(info->base + UART_LSR) & UART_LSR_TEMT;
1386
1387 len += (lsr ? 0 : 1);
1388
1389 if (copy_to_user(argp, &len, sizeof(int)))
1390 return -EFAULT;
1391
1392 return 0;
1393 }
1394 case MOXA_ASPP_MON:{
1395 int mcr, status;
1396 // info->mon_data.ser_param = tty->termios->c_cflag;
1397
1398 status = mxser_get_msr(info->base, 1, info->port, info);
1399 mxser_check_modem_status(info, status);
1400
1401 mcr = inb(info->base + UART_MCR);
1402 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1403 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1404 else
1405 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1406
1407 if (mcr & MOXA_MUST_MCR_TX_XON)
1408 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1409 else
1410 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1411
1412 if (info->tty->hw_stopped)
1413 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1414 else
1415 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1416
1417
1418 if (copy_to_user(argp, &info->mon_data, sizeof(struct mxser_mon)))
1419 return -EFAULT;
1420
1421 return 0;
1422
1423 }
1424
1425 case MOXA_ASPP_LSTATUS:{
1426 if (copy_to_user(argp, &info->err_shadow, sizeof(unsigned char)))
1427 return -EFAULT;
1428
1429 info->err_shadow = 0;
1430 return 0;
1431
1432 }
1433 case MOXA_SET_BAUD_METHOD:{
1434 int method;
1435 if (get_user(method, (int __user *) argp))
1436 return -EFAULT;
1437 mxser_set_baud_method[info->port] = method;
1438 if (copy_to_user(argp, &method, sizeof(int)))
1439 return -EFAULT;
1440
1441 return 0;
1442 }
1443 default:
1444 return -ENOIOCTLCMD;
1445 }
1446 return 0;
1447 }
1448
1449 #ifndef CMSPAR
1450 #define CMSPAR 010000000000
1451 #endif
1452
1453 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1454 {
1455 int i, result, status;
1456
1457 switch (cmd) {
1458 case MOXA_GET_CONF:
1459 if (copy_to_user(argp, mxsercfg, sizeof(struct mxser_hwconf) * 4))
1460 return -EFAULT;
1461 return 0;
1462 case MOXA_GET_MAJOR:
1463 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1464 return -EFAULT;
1465 return 0;
1466
1467 case MOXA_GET_CUMAJOR:
1468 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1469 return -EFAULT;
1470 return 0;
1471
1472 case MOXA_CHKPORTENABLE:
1473 result = 0;
1474 for (i = 0; i < MXSER_PORTS; i++) {
1475 if (mxvar_table[i].base)
1476 result |= (1 << i);
1477 }
1478 return put_user(result, (unsigned long __user *) argp);
1479 case MOXA_GETDATACOUNT:
1480 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1481 return -EFAULT;
1482 return (0);
1483 case MOXA_GETMSTATUS:
1484 for (i = 0; i < MXSER_PORTS; i++) {
1485 GMStatus[i].ri = 0;
1486 if (!mxvar_table[i].base) {
1487 GMStatus[i].dcd = 0;
1488 GMStatus[i].dsr = 0;
1489 GMStatus[i].cts = 0;
1490 continue;
1491 }
1492
1493 if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios)
1494 GMStatus[i].cflag = mxvar_table[i].normal_termios.c_cflag;
1495 else
1496 GMStatus[i].cflag = mxvar_table[i].tty->termios->c_cflag;
1497
1498 status = inb(mxvar_table[i].base + UART_MSR);
1499 if (status & 0x80 /*UART_MSR_DCD */ )
1500 GMStatus[i].dcd = 1;
1501 else
1502 GMStatus[i].dcd = 0;
1503
1504 if (status & 0x20 /*UART_MSR_DSR */ )
1505 GMStatus[i].dsr = 1;
1506 else
1507 GMStatus[i].dsr = 0;
1508
1509
1510 if (status & 0x10 /*UART_MSR_CTS */ )
1511 GMStatus[i].cts = 1;
1512 else
1513 GMStatus[i].cts = 0;
1514 }
1515 if (copy_to_user(argp, GMStatus, sizeof(struct mxser_mstatus) * MXSER_PORTS))
1516 return -EFAULT;
1517 return 0;
1518 case MOXA_ASPP_MON_EXT:{
1519 int status;
1520 int opmode, p;
1521 int shiftbit;
1522 unsigned cflag, iflag;
1523
1524 for (i = 0; i < MXSER_PORTS; i++) {
1525
1526 if (!mxvar_table[i].base)
1527 continue;
1528
1529 status = mxser_get_msr(mxvar_table[i].base, 0, i, &(mxvar_table[i]));
1530 // mxser_check_modem_status(&mxvar_table[i], status);
1531 if (status & UART_MSR_TERI)
1532 mxvar_table[i].icount.rng++;
1533 if (status & UART_MSR_DDSR)
1534 mxvar_table[i].icount.dsr++;
1535 if (status & UART_MSR_DDCD)
1536 mxvar_table[i].icount.dcd++;
1537 if (status & UART_MSR_DCTS)
1538 mxvar_table[i].icount.cts++;
1539
1540 mxvar_table[i].mon_data.modem_status = status;
1541 mon_data_ext.rx_cnt[i] = mxvar_table[i].mon_data.rxcnt;
1542 mon_data_ext.tx_cnt[i] = mxvar_table[i].mon_data.txcnt;
1543 mon_data_ext.up_rxcnt[i] = mxvar_table[i].mon_data.up_rxcnt;
1544 mon_data_ext.up_txcnt[i] = mxvar_table[i].mon_data.up_txcnt;
1545 mon_data_ext.modem_status[i] = mxvar_table[i].mon_data.modem_status;
1546 mon_data_ext.baudrate[i] = mxvar_table[i].realbaud;
1547
1548 if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios) {
1549 cflag = mxvar_table[i].normal_termios.c_cflag;
1550 iflag = mxvar_table[i].normal_termios.c_iflag;
1551 } else {
1552 cflag = mxvar_table[i].tty->termios->c_cflag;
1553 iflag = mxvar_table[i].tty->termios->c_iflag;
1554 }
1555
1556 mon_data_ext.databits[i] = cflag & CSIZE;
1557
1558 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1559
1560 mon_data_ext.parity[i] = cflag & (PARENB | PARODD | CMSPAR);
1561
1562 mon_data_ext.flowctrl[i] = 0x00;
1563
1564 if (cflag & CRTSCTS)
1565 mon_data_ext.flowctrl[i] |= 0x03;
1566
1567 if (iflag & (IXON | IXOFF))
1568 mon_data_ext.flowctrl[i] |= 0x0C;
1569
1570 if (mxvar_table[i].type == PORT_16550A)
1571 mon_data_ext.fifo[i] = 1;
1572 else
1573 mon_data_ext.fifo[i] = 0;
1574
1575 p = i % 4;
1576 shiftbit = p * 2;
1577 opmode = inb(mxvar_table[i].opmode_ioaddr) >> shiftbit;
1578 opmode &= OP_MODE_MASK;
1579
1580 mon_data_ext.iftype[i] = opmode;
1581
1582 }
1583 if (copy_to_user(argp, &mon_data_ext, sizeof(struct mxser_mon_ext)))
1584 return -EFAULT;
1585
1586 return 0;
1587
1588 }
1589 default:
1590 return -ENOIOCTLCMD;
1591 }
1592 return 0;
1593 }
1594
1595
1596 static void mxser_stoprx(struct tty_struct *tty)
1597 {
1598 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1599 //unsigned long flags;
1600
1601
1602 info->ldisc_stop_rx = 1;
1603 if (I_IXOFF(tty)) {
1604
1605 //MX_LOCK(&info->slock);
1606 // following add by Victor Yu. 09-02-2002
1607 if (info->IsMoxaMustChipFlag) {
1608 info->IER &= ~MOXA_MUST_RECV_ISR;
1609 outb(info->IER, info->base + UART_IER);
1610 } else {
1611 // above add by Victor Yu. 09-02-2002
1612
1613 info->x_char = STOP_CHAR(tty);
1614 // outb(info->IER, 0); // mask by Victor Yu. 09-02-2002
1615 outb(0, info->base + UART_IER);
1616 info->IER |= UART_IER_THRI;
1617 outb(info->IER, info->base + UART_IER); /* force Tx interrupt */
1618 } // add by Victor Yu. 09-02-2002
1619 //MX_UNLOCK(&info->slock);
1620 }
1621
1622 if (info->tty->termios->c_cflag & CRTSCTS) {
1623 //MX_LOCK(&info->slock);
1624 info->MCR &= ~UART_MCR_RTS;
1625 outb(info->MCR, info->base + UART_MCR);
1626 //MX_UNLOCK(&info->slock);
1627 }
1628 }
1629
1630 static void mxser_startrx(struct tty_struct *tty)
1631 {
1632 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1633 //unsigned long flags;
1634
1635 info->ldisc_stop_rx = 0;
1636 if (I_IXOFF(tty)) {
1637 if (info->x_char)
1638 info->x_char = 0;
1639 else {
1640 //MX_LOCK(&info->slock);
1641
1642 // following add by Victor Yu. 09-02-2002
1643 if (info->IsMoxaMustChipFlag) {
1644 info->IER |= MOXA_MUST_RECV_ISR;
1645 outb(info->IER, info->base + UART_IER);
1646 } else {
1647 // above add by Victor Yu. 09-02-2002
1648
1649 info->x_char = START_CHAR(tty);
1650 // outb(info->IER, 0); // mask by Victor Yu. 09-02-2002
1651 outb(0, info->base + UART_IER); // add by Victor Yu. 09-02-2002
1652 info->IER |= UART_IER_THRI; /* force Tx interrupt */
1653 outb(info->IER, info->base + UART_IER);
1654 } // add by Victor Yu. 09-02-2002
1655 //MX_UNLOCK(&info->slock);
1656 }
1657 }
1658
1659 if (info->tty->termios->c_cflag & CRTSCTS) {
1660 //MX_LOCK(&info->slock);
1661 info->MCR |= UART_MCR_RTS;
1662 outb(info->MCR, info->base + UART_MCR);
1663 //MX_UNLOCK(&info->slock);
1664 }
1665 }
1666
1667 /*
1668 * This routine is called by the upper-layer tty layer to signal that
1669 * incoming characters should be throttled.
1670 */
1671 static void mxser_throttle(struct tty_struct *tty)
1672 {
1673 //struct mxser_struct *info = (struct mxser_struct *)tty->driver_data;
1674 //unsigned long flags;
1675 //MX_LOCK(&info->slock);
1676 mxser_stoprx(tty);
1677 //MX_UNLOCK(&info->slock);
1678 }
1679
1680 static void mxser_unthrottle(struct tty_struct *tty)
1681 {
1682 //struct mxser_struct *info = (struct mxser_struct *)tty->driver_data;
1683 //unsigned long flags;
1684 //MX_LOCK(&info->slock);
1685 mxser_startrx(tty);
1686 //MX_UNLOCK(&info->slock);
1687 }
1688
1689 static void mxser_set_termios(struct tty_struct *tty, struct termios *old_termios)
1690 {
1691 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1692 unsigned long flags;
1693
1694 if ((tty->termios->c_cflag != old_termios->c_cflag) || (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
1695
1696 mxser_change_speed(info, old_termios);
1697
1698 if ((old_termios->c_cflag & CRTSCTS) && !(tty->termios->c_cflag & CRTSCTS)) {
1699 tty->hw_stopped = 0;
1700 mxser_start(tty);
1701 }
1702 }
1703
1704 /* Handle sw stopped */
1705 if ((old_termios->c_iflag & IXON) && !(tty->termios->c_iflag & IXON)) {
1706 tty->stopped = 0;
1707
1708 // following add by Victor Yu. 09-02-2002
1709 if (info->IsMoxaMustChipFlag) {
1710 spin_lock_irqsave(&info->slock, flags);
1711 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
1712 spin_unlock_irqrestore(&info->slock, flags);
1713 }
1714 // above add by Victor Yu. 09-02-2002
1715
1716 mxser_start(tty);
1717 }
1718 }
1719
1720 /*
1721 * mxser_stop() and mxser_start()
1722 *
1723 * This routines are called before setting or resetting tty->stopped.
1724 * They enable or disable transmitter interrupts, as necessary.
1725 */
1726 static void mxser_stop(struct tty_struct *tty)
1727 {
1728 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1729 unsigned long flags;
1730
1731 spin_lock_irqsave(&info->slock, flags);
1732 if (info->IER & UART_IER_THRI) {
1733 info->IER &= ~UART_IER_THRI;
1734 outb(info->IER, info->base + UART_IER);
1735 }
1736 spin_unlock_irqrestore(&info->slock, flags);
1737 }
1738
1739 static void mxser_start(struct tty_struct *tty)
1740 {
1741 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1742 unsigned long flags;
1743
1744 spin_lock_irqsave(&info->slock, flags);
1745 if (info->xmit_cnt && info->xmit_buf && !(info->IER & UART_IER_THRI)) {
1746 info->IER |= UART_IER_THRI;
1747 outb(info->IER, info->base + UART_IER);
1748 }
1749 spin_unlock_irqrestore(&info->slock, flags);
1750 }
1751
1752 /*
1753 * mxser_wait_until_sent() --- wait until the transmitter is empty
1754 */
1755 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1756 {
1757 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1758 unsigned long orig_jiffies, char_time;
1759 int lsr;
1760
1761 if (info->type == PORT_UNKNOWN)
1762 return;
1763
1764 if (info->xmit_fifo_size == 0)
1765 return; /* Just in case.... */
1766
1767 orig_jiffies = jiffies;
1768 /*
1769 * Set the check interval to be 1/5 of the estimated time to
1770 * send a single character, and make it at least 1. The check
1771 * interval should also be less than the timeout.
1772 *
1773 * Note: we have to use pretty tight timings here to satisfy
1774 * the NIST-PCTS.
1775 */
1776 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1777 char_time = char_time / 5;
1778 if (char_time == 0)
1779 char_time = 1;
1780 if (timeout && timeout < char_time)
1781 char_time = timeout;
1782 /*
1783 * If the transmitter hasn't cleared in twice the approximate
1784 * amount of time to send the entire FIFO, it probably won't
1785 * ever clear. This assumes the UART isn't doing flow
1786 * control, which is currently the case. Hence, if it ever
1787 * takes longer than info->timeout, this is probably due to a
1788 * UART bug of some kind. So, we clamp the timeout parameter at
1789 * 2*info->timeout.
1790 */
1791 if (!timeout || timeout > 2 * info->timeout)
1792 timeout = 2 * info->timeout;
1793 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1794 printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...", timeout, char_time);
1795 printk("jiff=%lu...", jiffies);
1796 #endif
1797 while (!((lsr = inb(info->base + UART_LSR)) & UART_LSR_TEMT)) {
1798 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1799 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1800 #endif
1801 schedule_timeout_interruptible(char_time);
1802 if (signal_pending(current))
1803 break;
1804 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1805 break;
1806 }
1807 set_current_state(TASK_RUNNING);
1808
1809 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1810 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1811 #endif
1812 }
1813
1814
1815 /*
1816 * This routine is called by tty_hangup() when a hangup is signaled.
1817 */
1818 void mxser_hangup(struct tty_struct *tty)
1819 {
1820 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1821
1822 mxser_flush_buffer(tty);
1823 mxser_shutdown(info);
1824 info->event = 0;
1825 info->count = 0;
1826 info->flags &= ~ASYNC_NORMAL_ACTIVE;
1827 info->tty = NULL;
1828 wake_up_interruptible(&info->open_wait);
1829 }
1830
1831
1832 // added by James 03-12-2004.
1833 /*
1834 * mxser_rs_break() --- routine which turns the break handling on or off
1835 */
1836 static void mxser_rs_break(struct tty_struct *tty, int break_state)
1837 {
1838 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1839 unsigned long flags;
1840
1841 spin_lock_irqsave(&info->slock, flags);
1842 if (break_state == -1)
1843 outb(inb(info->base + UART_LCR) | UART_LCR_SBC, info->base + UART_LCR);
1844 else
1845 outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC, info->base + UART_LCR);
1846 spin_unlock_irqrestore(&info->slock, flags);
1847 }
1848
1849 // (above) added by James.
1850
1851
1852 /*
1853 * This is the serial driver's generic interrupt routine
1854 */
1855 static irqreturn_t mxser_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1856 {
1857 int status, iir, i;
1858 struct mxser_struct *info;
1859 struct mxser_struct *port;
1860 int max, irqbits, bits, msr;
1861 int pass_counter = 0;
1862 int handled = IRQ_NONE;
1863
1864 port = NULL;
1865 //spin_lock(&gm_lock);
1866
1867 for (i = 0; i < MXSER_BOARDS; i++) {
1868 if (dev_id == &(mxvar_table[i * MXSER_PORTS_PER_BOARD])) {
1869 port = dev_id;
1870 break;
1871 }
1872 }
1873
1874 if (i == MXSER_BOARDS) {
1875 goto irq_stop;
1876 }
1877 if (port == 0) {
1878 goto irq_stop;
1879 }
1880 max = mxser_numports[mxsercfg[i].board_type - 1];
1881 while (1) {
1882 irqbits = inb(port->vector) & port->vectormask;
1883 if (irqbits == port->vectormask) {
1884 break;
1885 }
1886
1887 handled = IRQ_HANDLED;
1888 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
1889 if (irqbits == port->vectormask) {
1890 break;
1891 }
1892 if (bits & irqbits)
1893 continue;
1894 info = port + i;
1895
1896 // following add by Victor Yu. 09-13-2002
1897 iir = inb(info->base + UART_IIR);
1898 if (iir & UART_IIR_NO_INT)
1899 continue;
1900 iir &= MOXA_MUST_IIR_MASK;
1901 if (!info->tty) {
1902 status = inb(info->base + UART_LSR);
1903 outb(0x27, info->base + UART_FCR);
1904 inb(info->base + UART_MSR);
1905 continue;
1906 }
1907 // above add by Victor Yu. 09-13-2002
1908 /*
1909 if ( info->tty->flip.count < TTY_FLIPBUF_SIZE/4 ){
1910 info->IER |= MOXA_MUST_RECV_ISR;
1911 outb(info->IER, info->base + UART_IER);
1912 }
1913 */
1914
1915
1916 /* mask by Victor Yu. 09-13-2002
1917 if ( !info->tty ||
1918 (inb(info->base + UART_IIR) & UART_IIR_NO_INT) )
1919 continue;
1920 */
1921 /* mask by Victor Yu. 09-02-2002
1922 status = inb(info->base + UART_LSR) & info->read_status_mask;
1923 */
1924
1925 // following add by Victor Yu. 09-02-2002
1926 status = inb(info->base + UART_LSR);
1927
1928 if (status & UART_LSR_PE) {
1929 info->err_shadow |= NPPI_NOTIFY_PARITY;
1930 }
1931 if (status & UART_LSR_FE) {
1932 info->err_shadow |= NPPI_NOTIFY_FRAMING;
1933 }
1934 if (status & UART_LSR_OE) {
1935 info->err_shadow |= NPPI_NOTIFY_HW_OVERRUN;
1936 }
1937 if (status & UART_LSR_BI)
1938 info->err_shadow |= NPPI_NOTIFY_BREAK;
1939
1940 if (info->IsMoxaMustChipFlag) {
1941 /*
1942 if ( (status & 0x02) && !(status & 0x01) ) {
1943 outb(info->base+UART_FCR, 0x23);
1944 continue;
1945 }
1946 */
1947 if (iir == MOXA_MUST_IIR_GDA || iir == MOXA_MUST_IIR_RDA || iir == MOXA_MUST_IIR_RTO || iir == MOXA_MUST_IIR_LSR)
1948 mxser_receive_chars(info, &status);
1949
1950 } else {
1951 // above add by Victor Yu. 09-02-2002
1952
1953 status &= info->read_status_mask;
1954 if (status & UART_LSR_DR)
1955 mxser_receive_chars(info, &status);
1956 }
1957 msr = inb(info->base + UART_MSR);
1958 if (msr & UART_MSR_ANY_DELTA) {
1959 mxser_check_modem_status(info, msr);
1960 }
1961 // following add by Victor Yu. 09-13-2002
1962 if (info->IsMoxaMustChipFlag) {
1963 if ((iir == 0x02) && (status & UART_LSR_THRE)) {
1964 mxser_transmit_chars(info);
1965 }
1966 } else {
1967 // above add by Victor Yu. 09-13-2002
1968
1969 if (status & UART_LSR_THRE) {
1970 /* 8-2-99 by William
1971 if ( info->x_char || (info->xmit_cnt > 0) )
1972 */
1973 mxser_transmit_chars(info);
1974 }
1975 }
1976 }
1977 if (pass_counter++ > MXSER_ISR_PASS_LIMIT) {
1978 break; /* Prevent infinite loops */
1979 }
1980 }
1981
1982 irq_stop:
1983 //spin_unlock(&gm_lock);
1984 return handled;
1985 }
1986
1987 static void mxser_receive_chars(struct mxser_struct *info, int *status)
1988 {
1989 struct tty_struct *tty = info->tty;
1990 unsigned char ch, gdl;
1991 int ignored = 0;
1992 int cnt = 0;
1993 int recv_room;
1994 int max = 256;
1995 unsigned long flags;
1996
1997 spin_lock_irqsave(&info->slock, flags);
1998
1999 recv_room = tty->ldisc.receive_room(tty);
2000 if ((recv_room == 0) && (!info->ldisc_stop_rx)) {
2001 //mxser_throttle(tty);
2002 mxser_stoprx(tty);
2003 //return;
2004 }
2005
2006 // following add by Victor Yu. 09-02-2002
2007 if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
2008
2009 if (*status & UART_LSR_SPECIAL) {
2010 goto intr_old;
2011 }
2012 // following add by Victor Yu. 02-11-2004
2013 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID && (*status & MOXA_MUST_LSR_RERR))
2014 goto intr_old;
2015 // above add by Victor Yu. 02-14-2004
2016 if (*status & MOXA_MUST_LSR_RERR)
2017 goto intr_old;
2018
2019 gdl = inb(info->base + MOXA_MUST_GDL_REGISTER);
2020
2021 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU150_HWID) // add by Victor Yu. 02-11-2004
2022 gdl &= MOXA_MUST_GDL_MASK;
2023 if (gdl >= recv_room) {
2024 if (!info->ldisc_stop_rx) {
2025 //mxser_throttle(tty);
2026 mxser_stoprx(tty);
2027 }
2028 //return;
2029 }
2030 while (gdl--) {
2031 ch = inb(info->base + UART_RX);
2032 tty_insert_flip_char(tty, ch, 0);
2033 cnt++;
2034 /*
2035 if((cnt>=HI_WATER) && (info->stop_rx==0)){
2036 mxser_stoprx(tty);
2037 info->stop_rx=1;
2038 break;
2039 } */
2040 }
2041 goto end_intr;
2042 }
2043 intr_old:
2044 // above add by Victor Yu. 09-02-2002
2045
2046 do {
2047 if (max-- < 0)
2048 break;
2049 /*
2050 if((cnt>=HI_WATER) && (info->stop_rx==0)){
2051 mxser_stoprx(tty);
2052 info->stop_rx=1;
2053 break;
2054 }
2055 */
2056
2057 ch = inb(info->base + UART_RX);
2058 // following add by Victor Yu. 09-02-2002
2059 if (info->IsMoxaMustChipFlag && (*status & UART_LSR_OE) /*&& !(*status&UART_LSR_DR) */ )
2060 outb(0x23, info->base + UART_FCR);
2061 *status &= info->read_status_mask;
2062 // above add by Victor Yu. 09-02-2002
2063 if (*status & info->ignore_status_mask) {
2064 if (++ignored > 100)
2065 break;
2066 } else {
2067 char flag = 0;
2068 if (*status & UART_LSR_SPECIAL) {
2069 if (*status & UART_LSR_BI) {
2070 flag = TTY_BREAK;
2071 /* added by casper 1/11/2000 */
2072 info->icount.brk++;
2073 /* */
2074 if (info->flags & ASYNC_SAK)
2075 do_SAK(tty);
2076 } else if (*status & UART_LSR_PE) {
2077 flag = TTY_PARITY;
2078 /* added by casper 1/11/2000 */
2079 info->icount.parity++;
2080 /* */
2081 } else if (*status & UART_LSR_FE) {
2082 flag = TTY_FRAME;
2083 /* added by casper 1/11/2000 */
2084 info->icount.frame++;
2085 /* */
2086 } else if (*status & UART_LSR_OE) {
2087 flag = TTY_OVERRUN;
2088 /* added by casper 1/11/2000 */
2089 info->icount.overrun++;
2090 /* */
2091 }
2092 }
2093 tty_insert_flip_char(tty, ch, flag);
2094 cnt++;
2095 if (cnt >= recv_room) {
2096 if (!info->ldisc_stop_rx) {
2097 //mxser_throttle(tty);
2098 mxser_stoprx(tty);
2099 }
2100 break;
2101 }
2102
2103 }
2104
2105 // following add by Victor Yu. 09-02-2002
2106 if (info->IsMoxaMustChipFlag)
2107 break;
2108 // above add by Victor Yu. 09-02-2002
2109
2110 /* mask by Victor Yu. 09-02-2002
2111 *status = inb(info->base + UART_LSR) & info->read_status_mask;
2112 */
2113 // following add by Victor Yu. 09-02-2002
2114 *status = inb(info->base + UART_LSR);
2115 // above add by Victor Yu. 09-02-2002
2116 } while (*status & UART_LSR_DR);
2117
2118 end_intr: // add by Victor Yu. 09-02-2002
2119
2120 mxvar_log.rxcnt[info->port] += cnt;
2121 info->mon_data.rxcnt += cnt;
2122 info->mon_data.up_rxcnt += cnt;
2123 spin_unlock_irqrestore(&info->slock, flags);
2124
2125 tty_flip_buffer_push(tty);
2126 }
2127
2128 static void mxser_transmit_chars(struct mxser_struct *info)
2129 {
2130 int count, cnt;
2131 unsigned long flags;
2132
2133 spin_lock_irqsave(&info->slock, flags);
2134
2135 if (info->x_char) {
2136 outb(info->x_char, info->base + UART_TX);
2137 info->x_char = 0;
2138 mxvar_log.txcnt[info->port]++;
2139 info->mon_data.txcnt++;
2140 info->mon_data.up_txcnt++;
2141
2142 /* added by casper 1/11/2000 */
2143 info->icount.tx++;
2144 /* */
2145 spin_unlock_irqrestore(&info->slock, flags);
2146 return;
2147 }
2148
2149 if (info->xmit_buf == 0) {
2150 spin_unlock_irqrestore(&info->slock, flags);
2151 return;
2152 }
2153
2154 if ((info->xmit_cnt <= 0) || info->tty->stopped || (info->tty->hw_stopped && (info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag))) {
2155 info->IER &= ~UART_IER_THRI;
2156 outb(info->IER, info->base + UART_IER);
2157 spin_unlock_irqrestore(&info->slock, flags);
2158 return;
2159 }
2160
2161 cnt = info->xmit_cnt;
2162 count = info->xmit_fifo_size;
2163 do {
2164 outb(info->xmit_buf[info->xmit_tail++], info->base + UART_TX);
2165 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2166 if (--info->xmit_cnt <= 0)
2167 break;
2168 } while (--count > 0);
2169 mxvar_log.txcnt[info->port] += (cnt - info->xmit_cnt);
2170
2171 // added by James 03-12-2004.
2172 info->mon_data.txcnt += (cnt - info->xmit_cnt);
2173 info->mon_data.up_txcnt += (cnt - info->xmit_cnt);
2174 // (above) added by James.
2175
2176 /* added by casper 1/11/2000 */
2177 info->icount.tx += (cnt - info->xmit_cnt);
2178 /* */
2179
2180 if (info->xmit_cnt < WAKEUP_CHARS) {
2181 set_bit(MXSER_EVENT_TXLOW, &info->event);
2182 schedule_work(&info->tqueue);
2183 }
2184 if (info->xmit_cnt <= 0) {
2185 info->IER &= ~UART_IER_THRI;
2186 outb(info->IER, info->base + UART_IER);
2187 }
2188 spin_unlock_irqrestore(&info->slock, flags);
2189 }
2190
2191 static void mxser_check_modem_status(struct mxser_struct *info, int status)
2192 {
2193 /* update input line counters */
2194 if (status & UART_MSR_TERI)
2195 info->icount.rng++;
2196 if (status & UART_MSR_DDSR)
2197 info->icount.dsr++;
2198 if (status & UART_MSR_DDCD)
2199 info->icount.dcd++;
2200 if (status & UART_MSR_DCTS)
2201 info->icount.cts++;
2202 info->mon_data.modem_status = status;
2203 wake_up_interruptible(&info->delta_msr_wait);
2204
2205
2206 if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
2207 if (status & UART_MSR_DCD)
2208 wake_up_interruptible(&info->open_wait);
2209 schedule_work(&info->tqueue);
2210 }
2211
2212 if (info->flags & ASYNC_CTS_FLOW) {
2213 if (info->tty->hw_stopped) {
2214 if (status & UART_MSR_CTS) {
2215 info->tty->hw_stopped = 0;
2216
2217 if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2218 info->IER |= UART_IER_THRI;
2219 outb(info->IER, info->base + UART_IER);
2220 }
2221 set_bit(MXSER_EVENT_TXLOW, &info->event);
2222 schedule_work(&info->tqueue); }
2223 } else {
2224 if (!(status & UART_MSR_CTS)) {
2225 info->tty->hw_stopped = 1;
2226 if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2227 info->IER &= ~UART_IER_THRI;
2228 outb(info->IER, info->base + UART_IER);
2229 }
2230 }
2231 }
2232 }
2233 }
2234
2235 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, struct mxser_struct *info)
2236 {
2237 DECLARE_WAITQUEUE(wait, current);
2238 int retval;
2239 int do_clocal = 0;
2240 unsigned long flags;
2241
2242 /*
2243 * If non-blocking mode is set, or the port is not enabled,
2244 * then make the check up front and then exit.
2245 */
2246 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2247 info->flags |= ASYNC_NORMAL_ACTIVE;
2248 return (0);
2249 }
2250
2251 if (tty->termios->c_cflag & CLOCAL)
2252 do_clocal = 1;
2253
2254 /*
2255 * Block waiting for the carrier detect and the line to become
2256 * free (i.e., not in use by the callout). While we are in
2257 * this loop, info->count is dropped by one, so that
2258 * mxser_close() knows when to free things. We restore it upon
2259 * exit, either normal or abnormal.
2260 */
2261 retval = 0;
2262 add_wait_queue(&info->open_wait, &wait);
2263
2264 spin_lock_irqsave(&info->slock, flags);
2265 if (!tty_hung_up_p(filp))
2266 info->count--;
2267 spin_unlock_irqrestore(&info->slock, flags);
2268 info->blocked_open++;
2269 while (1) {
2270 spin_lock_irqsave(&info->slock, flags);
2271 outb(inb(info->base + UART_MCR) | UART_MCR_DTR | UART_MCR_RTS, info->base + UART_MCR);
2272 spin_unlock_irqrestore(&info->slock, flags);
2273 set_current_state(TASK_INTERRUPTIBLE);
2274 if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)) {
2275 if (info->flags & ASYNC_HUP_NOTIFY)
2276 retval = -EAGAIN;
2277 else
2278 retval = -ERESTARTSYS;
2279 break;
2280 }
2281 if (!(info->flags & ASYNC_CLOSING) && (do_clocal || (inb(info->base + UART_MSR) & UART_MSR_DCD)))
2282 break;
2283 if (signal_pending(current)) {
2284 retval = -ERESTARTSYS;
2285 break;
2286 }
2287 schedule();
2288 }
2289 set_current_state(TASK_RUNNING);
2290 remove_wait_queue(&info->open_wait, &wait);
2291 if (!tty_hung_up_p(filp))
2292 info->count++;
2293 info->blocked_open--;
2294 if (retval)
2295 return (retval);
2296 info->flags |= ASYNC_NORMAL_ACTIVE;
2297 return (0);
2298 }
2299
2300 static int mxser_startup(struct mxser_struct *info)
2301 {
2302
2303 unsigned long page;
2304 unsigned long flags;
2305
2306 page = __get_free_page(GFP_KERNEL);
2307 if (!page)
2308 return (-ENOMEM);
2309
2310 spin_lock_irqsave(&info->slock, flags);
2311
2312 if (info->flags & ASYNC_INITIALIZED) {
2313 free_page(page);
2314 spin_unlock_irqrestore(&info->slock, flags);
2315 return (0);
2316 }
2317
2318 if (!info->base || !info->type) {
2319 if (info->tty)
2320 set_bit(TTY_IO_ERROR, &info->tty->flags);
2321 free_page(page);
2322 spin_unlock_irqrestore(&info->slock, flags);
2323 return (0);
2324 }
2325 if (info->xmit_buf)
2326 free_page(page);
2327 else
2328 info->xmit_buf = (unsigned char *) page;
2329
2330 /*
2331 * Clear the FIFO buffers and disable them
2332 * (they will be reenabled in mxser_change_speed())
2333 */
2334 if (info->IsMoxaMustChipFlag)
2335 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2336 else
2337 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
2338
2339 /*
2340 * At this point there's no way the LSR could still be 0xFF;
2341 * if it is, then bail out, because there's likely no UART
2342 * here.
2343 */
2344 if (inb(info->base + UART_LSR) == 0xff) {
2345 spin_unlock_irqrestore(&info->slock, flags);
2346 if (capable(CAP_SYS_ADMIN)) {
2347 if (info->tty)
2348 set_bit(TTY_IO_ERROR, &info->tty->flags);
2349 return (0);
2350 } else
2351 return (-ENODEV);
2352 }
2353
2354 /*
2355 * Clear the interrupt registers.
2356 */
2357 (void) inb(info->base + UART_LSR);
2358 (void) inb(info->base + UART_RX);
2359 (void) inb(info->base + UART_IIR);
2360 (void) inb(info->base + UART_MSR);
2361
2362 /*
2363 * Now, initialize the UART
2364 */
2365 outb(UART_LCR_WLEN8, info->base + UART_LCR); /* reset DLAB */
2366 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
2367 outb(info->MCR, info->base + UART_MCR);
2368
2369 /*
2370 * Finally, enable interrupts
2371 */
2372 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
2373 // info->IER = UART_IER_RLSI | UART_IER_RDI;
2374
2375 // following add by Victor Yu. 08-30-2002
2376 if (info->IsMoxaMustChipFlag)
2377 info->IER |= MOXA_MUST_IER_EGDAI;
2378 // above add by Victor Yu. 08-30-2002
2379 outb(info->IER, info->base + UART_IER); /* enable interrupts */
2380
2381 /*
2382 * And clear the interrupt registers again for luck.
2383 */
2384 (void) inb(info->base + UART_LSR);
2385 (void) inb(info->base + UART_RX);
2386 (void) inb(info->base + UART_IIR);
2387 (void) inb(info->base + UART_MSR);
2388
2389 if (info->tty)
2390 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2391 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2392
2393 /*
2394 * and set the speed of the serial port
2395 */
2396 spin_unlock_irqrestore(&info->slock, flags);
2397 mxser_change_speed(info, NULL);
2398
2399 info->flags |= ASYNC_INITIALIZED;
2400 return (0);
2401 }
2402
2403 /*
2404 * This routine will shutdown a serial port; interrupts maybe disabled, and
2405 * DTR is dropped if the hangup on close termio flag is on.
2406 */
2407 static void mxser_shutdown(struct mxser_struct *info)
2408 {
2409 unsigned long flags;
2410
2411 if (!(info->flags & ASYNC_INITIALIZED))
2412 return;
2413
2414 spin_lock_irqsave(&info->slock, flags);
2415
2416 /*
2417 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
2418 * here so the queue might never be waken up
2419 */
2420 wake_up_interruptible(&info->delta_msr_wait);
2421
2422 /*
2423 * Free the IRQ, if necessary
2424 */
2425 if (info->xmit_buf) {
2426 free_page((unsigned long) info->xmit_buf);
2427 info->xmit_buf = NULL;
2428 }
2429
2430 info->IER = 0;
2431 outb(0x00, info->base + UART_IER);
2432
2433 if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
2434 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
2435 outb(info->MCR, info->base + UART_MCR);
2436
2437 /* clear Rx/Tx FIFO's */
2438 // following add by Victor Yu. 08-30-2002
2439 if (info->IsMoxaMustChipFlag)
2440 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2441 else
2442 // above add by Victor Yu. 08-30-2002
2443 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
2444
2445 /* read data port to reset things */
2446 (void) inb(info->base + UART_RX);
2447
2448 if (info->tty)
2449 set_bit(TTY_IO_ERROR, &info->tty->flags);
2450
2451 info->flags &= ~ASYNC_INITIALIZED;
2452
2453 // following add by Victor Yu. 09-23-2002
2454 if (info->IsMoxaMustChipFlag) {
2455 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->base);
2456 }
2457 // above add by Victor Yu. 09-23-2002
2458
2459 spin_unlock_irqrestore(&info->slock, flags);
2460 }
2461
2462 /*
2463 * This routine is called to set the UART divisor registers to match
2464 * the specified baud rate for a serial port.
2465 */
2466 static int mxser_change_speed(struct mxser_struct *info, struct termios *old_termios)
2467 {
2468 unsigned cflag, cval, fcr;
2469 int ret = 0;
2470 unsigned char status;
2471 long baud;
2472 unsigned long flags;
2473
2474
2475 if (!info->tty || !info->tty->termios)
2476 return ret;
2477 cflag = info->tty->termios->c_cflag;
2478 if (!(info->base))
2479 return ret;
2480
2481
2482 #ifndef B921600
2483 #define B921600 (B460800 +1)
2484 #endif
2485 if (mxser_set_baud_method[info->port] == 0) {
2486 switch (cflag & (CBAUD | CBAUDEX)) {
2487 case B921600:
2488 baud = 921600;
2489 break;
2490 case B460800:
2491 baud = 460800;
2492 break;
2493 case B230400:
2494 baud = 230400;
2495 break;
2496 case B115200:
2497 baud = 115200;
2498 break;
2499 case B57600:
2500 baud = 57600;
2501 break;
2502 case B38400:
2503 baud = 38400;
2504 break;
2505 case B19200:
2506 baud = 19200;
2507 break;
2508 case B9600:
2509 baud = 9600;
2510 break;
2511 case B4800:
2512 baud = 4800;
2513 break;
2514 case B2400:
2515 baud = 2400;
2516 break;
2517 case B1800:
2518 baud = 1800;
2519 break;
2520 case B1200:
2521 baud = 1200;
2522 break;
2523 case B600:
2524 baud = 600;
2525 break;
2526 case B300:
2527 baud = 300;
2528 break;
2529 case B200:
2530 baud = 200;
2531 break;
2532 case B150:
2533 baud = 150;
2534 break;
2535 case B134:
2536 baud = 134;
2537 break;
2538 case B110:
2539 baud = 110;
2540 break;
2541 case B75:
2542 baud = 75;
2543 break;
2544 case B50:
2545 baud = 50;
2546 break;
2547 default:
2548 baud = 0;
2549 break;
2550 }
2551 mxser_set_baud(info, baud);
2552 }
2553
2554 /* byte size and parity */
2555 switch (cflag & CSIZE) {
2556 case CS5:
2557 cval = 0x00;
2558 break;
2559 case CS6:
2560 cval = 0x01;
2561 break;
2562 case CS7:
2563 cval = 0x02;
2564 break;
2565 case CS8:
2566 cval = 0x03;
2567 break;
2568 default:
2569 cval = 0x00;
2570 break; /* too keep GCC shut... */
2571 }
2572 if (cflag & CSTOPB)
2573 cval |= 0x04;
2574 if (cflag & PARENB)
2575 cval |= UART_LCR_PARITY;
2576 if (!(cflag & PARODD)) {
2577 cval |= UART_LCR_EPAR;
2578 }
2579 if (cflag & CMSPAR)
2580 cval |= UART_LCR_SPAR;
2581
2582 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
2583 if (info->IsMoxaMustChipFlag) {
2584 fcr = UART_FCR_ENABLE_FIFO;
2585 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2586 SET_MOXA_MUST_FIFO_VALUE(info);
2587 } else
2588 fcr = 0;
2589 } else {
2590 fcr = UART_FCR_ENABLE_FIFO;
2591 // following add by Victor Yu. 08-30-2002
2592 if (info->IsMoxaMustChipFlag) {
2593 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2594 SET_MOXA_MUST_FIFO_VALUE(info);
2595 } else {
2596 // above add by Victor Yu. 08-30-2002
2597
2598 switch (info->rx_trigger) {
2599 case 1:
2600 fcr |= UART_FCR_TRIGGER_1;
2601 break;
2602 case 4:
2603 fcr |= UART_FCR_TRIGGER_4;
2604 break;
2605 case 8:
2606 fcr |= UART_FCR_TRIGGER_8;
2607 break;
2608 default:
2609 fcr |= UART_FCR_TRIGGER_14;
2610 break;
2611 }
2612 }
2613 }
2614
2615 /* CTS flow control flag and modem status interrupts */
2616 info->IER &= ~UART_IER_MSI;
2617 info->MCR &= ~UART_MCR_AFE;
2618 if (cflag & CRTSCTS) {
2619 info->flags |= ASYNC_CTS_FLOW;
2620 info->IER |= UART_IER_MSI;
2621 if ((info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
2622 info->MCR |= UART_MCR_AFE;
2623 //status = mxser_get_msr(info->base, 0, info->port);
2624 /* save_flags(flags);
2625 cli();
2626 status = inb(baseaddr + UART_MSR);
2627 restore_flags(flags);*/
2628 //mxser_check_modem_status(info, status);
2629 } else {
2630 //status = mxser_get_msr(info->base, 0, info->port);
2631
2632 //MX_LOCK(&info->slock);
2633 status = inb(info->base + UART_MSR);
2634 //MX_UNLOCK(&info->slock);
2635 if (info->tty->hw_stopped) {
2636 if (status & UART_MSR_CTS) {
2637 info->tty->hw_stopped = 0;
2638 if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2639 info->IER |= UART_IER_THRI;
2640 outb(info->IER, info->base + UART_IER);
2641 }
2642 set_bit(MXSER_EVENT_TXLOW, &info->event);
2643 schedule_work(&info->tqueue); }
2644 } else {
2645 if (!(status & UART_MSR_CTS)) {
2646 info->tty->hw_stopped = 1;
2647 if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2648 info->IER &= ~UART_IER_THRI;
2649 outb(info->IER, info->base + UART_IER);
2650 }
2651 }
2652 }
2653 }
2654 } else {
2655 info->flags &= ~ASYNC_CTS_FLOW;
2656 }
2657 outb(info->MCR, info->base + UART_MCR);
2658 if (cflag & CLOCAL) {
2659 info->flags &= ~ASYNC_CHECK_CD;
2660 } else {
2661 info->flags |= ASYNC_CHECK_CD;
2662 info->IER |= UART_IER_MSI;
2663 }
2664 outb(info->IER, info->base + UART_IER);
2665
2666 /*
2667 * Set up parity check flag
2668 */
2669 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
2670 if (I_INPCK(info->tty))
2671 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
2672 if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
2673 info->read_status_mask |= UART_LSR_BI;
2674
2675 info->ignore_status_mask = 0;
2676
2677 if (I_IGNBRK(info->tty)) {
2678 info->ignore_status_mask |= UART_LSR_BI;
2679 info->read_status_mask |= UART_LSR_BI;
2680 /*
2681 * If we're ignore parity and break indicators, ignore
2682 * overruns too. (For real raw support).
2683 */
2684 if (I_IGNPAR(info->tty)) {
2685 info->ignore_status_mask |= UART_LSR_OE | UART_LSR_PE | UART_LSR_FE;
2686 info->read_status_mask |= UART_LSR_OE | UART_LSR_PE | UART_LSR_FE;
2687 }
2688 }
2689 // following add by Victor Yu. 09-02-2002
2690 if (info->IsMoxaMustChipFlag) {
2691 spin_lock_irqsave(&info->slock, flags);
2692 SET_MOXA_MUST_XON1_VALUE(info->base, START_CHAR(info->tty));
2693 SET_MOXA_MUST_XOFF1_VALUE(info->base, STOP_CHAR(info->tty));
2694 if (I_IXON(info->tty)) {
2695 ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2696 } else {
2697 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2698 }
2699 if (I_IXOFF(info->tty)) {
2700 ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2701 } else {
2702 DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2703 }
2704 /*
2705 if ( I_IXANY(info->tty) ) {
2706 info->MCR |= MOXA_MUST_MCR_XON_ANY;
2707 ENABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2708 } else {
2709 info->MCR &= ~MOXA_MUST_MCR_XON_ANY;
2710 DISABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2711 }
2712 */
2713 spin_unlock_irqrestore(&info->slock, flags);
2714 }
2715 // above add by Victor Yu. 09-02-2002
2716
2717
2718 outb(fcr, info->base + UART_FCR); /* set fcr */
2719 outb(cval, info->base + UART_LCR);
2720
2721 return ret;
2722 }
2723
2724
2725 static int mxser_set_baud(struct mxser_struct *info, long newspd)
2726 {
2727 int quot = 0;
2728 unsigned char cval;
2729 int ret = 0;
2730 unsigned long flags;
2731
2732 if (!info->tty || !info->tty->termios)
2733 return ret;
2734
2735 if (!(info->base))
2736 return ret;
2737
2738 if (newspd > info->MaxCanSetBaudRate)
2739 return 0;
2740
2741 info->realbaud = newspd;
2742 if (newspd == 134) {
2743 quot = (2 * info->baud_base / 269);
2744 } else if (newspd) {
2745 quot = info->baud_base / newspd;
2746
2747 if (quot == 0)
2748 quot = 1;
2749
2750 } else {
2751 quot = 0;
2752 }
2753
2754 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
2755 info->timeout += HZ / 50; /* Add .02 seconds of slop */
2756
2757 if (quot) {
2758 spin_lock_irqsave(&info->slock, flags);
2759 info->MCR |= UART_MCR_DTR;
2760 outb(info->MCR, info->base + UART_MCR);
2761 spin_unlock_irqrestore(&info->slock, flags);
2762 } else {
2763 spin_lock_irqsave(&info->slock, flags);
2764 info->MCR &= ~UART_MCR_DTR;
2765 outb(info->MCR, info->base + UART_MCR);
2766 spin_unlock_irqrestore(&info->slock, flags);
2767 return ret;
2768 }
2769
2770 cval = inb(info->base + UART_LCR);
2771
2772 outb(cval | UART_LCR_DLAB, info->base + UART_LCR); /* set DLAB */
2773
2774 outb(quot & 0xff, info->base + UART_DLL); /* LS of divisor */
2775 outb(quot >> 8, info->base + UART_DLM); /* MS of divisor */
2776 outb(cval, info->base + UART_LCR); /* reset DLAB */
2777
2778
2779 return ret;
2780 }
2781
2782
2783
2784 /*
2785 * ------------------------------------------------------------
2786 * friends of mxser_ioctl()
2787 * ------------------------------------------------------------
2788 */
2789 static int mxser_get_serial_info(struct mxser_struct *info, struct serial_struct __user *retinfo)
2790 {
2791 struct serial_struct tmp;
2792
2793 if (!retinfo)
2794 return (-EFAULT);
2795 memset(&tmp, 0, sizeof(tmp));
2796 tmp.type = info->type;
2797 tmp.line = info->port;
2798 tmp.port = info->base;
2799 tmp.irq = info->irq;
2800 tmp.flags = info->flags;
2801 tmp.baud_base = info->baud_base;
2802 tmp.close_delay = info->close_delay;
2803 tmp.closing_wait = info->closing_wait;
2804 tmp.custom_divisor = info->custom_divisor;
2805 tmp.hub6 = 0;
2806 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2807 return -EFAULT;
2808 return (0);
2809 }
2810
2811 static int mxser_set_serial_info(struct mxser_struct *info, struct serial_struct __user *new_info)
2812 {
2813 struct serial_struct new_serial;
2814 unsigned int flags;
2815 int retval = 0;
2816
2817 if (!new_info || !info->base)
2818 return (-EFAULT);
2819 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2820 return -EFAULT;
2821
2822 if ((new_serial.irq != info->irq) || (new_serial.port != info->base) || (new_serial.custom_divisor != info->custom_divisor) || (new_serial.baud_base != info->baud_base))
2823 return (-EPERM);
2824
2825 flags = info->flags & ASYNC_SPD_MASK;
2826
2827 if (!capable(CAP_SYS_ADMIN)) {
2828 if ((new_serial.baud_base != info->baud_base) || (new_serial.close_delay != info->close_delay) || ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
2829 return (-EPERM);
2830 info->flags = ((info->flags & ~ASYNC_USR_MASK) | (new_serial.flags & ASYNC_USR_MASK));
2831 } else {
2832 /*
2833 * OK, past this point, all the error checking has been done.
2834 * At this point, we start making changes.....
2835 */
2836 info->flags = ((info->flags & ~ASYNC_FLAGS) | (new_serial.flags & ASYNC_FLAGS));
2837 info->close_delay = new_serial.close_delay * HZ / 100;
2838 info->closing_wait = new_serial.closing_wait * HZ / 100;
2839 info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2840 info->tty->low_latency = 0; //(info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2841 }
2842
2843 /* added by casper, 3/17/2000, for mouse */
2844 info->type = new_serial.type;
2845
2846 process_txrx_fifo(info);
2847
2848 /* */
2849 if (info->flags & ASYNC_INITIALIZED) {
2850 if (flags != (info->flags & ASYNC_SPD_MASK)) {
2851 mxser_change_speed(info, NULL);
2852 }
2853 } else {
2854 retval = mxser_startup(info);
2855 }
2856 return (retval);
2857 }
2858
2859 /*
2860 * mxser_get_lsr_info - get line status register info
2861 *
2862 * Purpose: Let user call ioctl() to get info when the UART physically
2863 * is emptied. On bus types like RS485, the transmitter must
2864 * release the bus after transmitting. This must be done when
2865 * the transmit shift register is empty, not be done when the
2866 * transmit holding register is empty. This functionality
2867 * allows an RS485 driver to be written in user space.
2868 */
2869 static int mxser_get_lsr_info(struct mxser_struct *info, unsigned int __user *value)
2870 {
2871 unsigned char status;
2872 unsigned int result;
2873 unsigned long flags;
2874
2875 spin_lock_irqsave(&info->slock, flags);
2876 status = inb(info->base + UART_LSR);
2877 spin_unlock_irqrestore(&info->slock, flags);
2878 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
2879 return put_user(result, value);
2880 }
2881
2882 /*
2883 * This routine sends a break character out the serial port.
2884 */
2885 static void mxser_send_break(struct mxser_struct *info, int duration)
2886 {
2887 unsigned long flags;
2888
2889 if (!info->base)
2890 return;
2891 set_current_state(TASK_INTERRUPTIBLE);
2892 spin_lock_irqsave(&info->slock, flags);
2893 outb(inb(info->base + UART_LCR) | UART_LCR_SBC, info->base + UART_LCR);
2894 spin_unlock_irqrestore(&info->slock, flags);
2895 schedule_timeout(duration);
2896 spin_lock_irqsave(&info->slock, flags);
2897 outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC, 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 = (struct mxser_struct *) 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) | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) | ((status & UART_MSR_RI) ? TIOCM_RNG : 0) | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
2922 }
2923
2924 static int mxser_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear)
2925 {
2926 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
2927 unsigned long flags;
2928
2929
2930 if (tty->index == MXSER_PORTS)
2931 return -ENOIOCTLCMD;
2932 if (tty->flags & (1 << TTY_IO_ERROR))
2933 return -EIO;
2934
2935 spin_lock_irqsave(&info->slock, flags);
2936
2937 if (set & TIOCM_RTS)
2938 info->MCR |= UART_MCR_RTS;
2939 if (set & TIOCM_DTR)
2940 info->MCR |= UART_MCR_DTR;
2941
2942 if (clear & TIOCM_RTS)
2943 info->MCR &= ~UART_MCR_RTS;
2944 if (clear & TIOCM_DTR)
2945 info->MCR &= ~UART_MCR_DTR;
2946
2947 outb(info->MCR, info->base + UART_MCR);
2948 spin_unlock_irqrestore(&info->slock, flags);
2949 return 0;
2950 }
2951
2952
2953 static int mxser_read_register(int, unsigned short *);
2954 static int mxser_program_mode(int);
2955 static void mxser_normal_mode(int);
2956
2957 static int mxser_get_ISA_conf(int cap, struct mxser_hwconf *hwconf)
2958 {
2959 int id, i, bits;
2960 unsigned short regs[16], irq;
2961 unsigned char scratch, scratch2;
2962
2963 hwconf->IsMoxaMustChipFlag = MOXA_OTHER_UART;
2964
2965 id = mxser_read_register(cap, regs);
2966 if (id == C168_ASIC_ID) {
2967 hwconf->board_type = MXSER_BOARD_C168_ISA;
2968 hwconf->ports = 8;
2969 } else if (id == C104_ASIC_ID) {
2970 hwconf->board_type = MXSER_BOARD_C104_ISA;
2971 hwconf->ports = 4;
2972 } else if (id == C102_ASIC_ID) {
2973 hwconf->board_type = MXSER_BOARD_C102_ISA;
2974 hwconf->ports = 2;
2975 } else if (id == CI132_ASIC_ID) {
2976 hwconf->board_type = MXSER_BOARD_CI132;
2977 hwconf->ports = 2;
2978 } else if (id == CI134_ASIC_ID) {
2979 hwconf->board_type = MXSER_BOARD_CI134;
2980 hwconf->ports = 4;
2981 } else if (id == CI104J_ASIC_ID) {
2982 hwconf->board_type = MXSER_BOARD_CI104J;
2983 hwconf->ports = 4;
2984 } else
2985 return (0);
2986
2987 irq = 0;
2988 if (hwconf->ports == 2) {
2989 irq = regs[9] & 0xF000;
2990 irq = irq | (irq >> 4);
2991 if (irq != (regs[9] & 0xFF00))
2992 return (MXSER_ERR_IRQ_CONFLIT);
2993 } else if (hwconf->ports == 4) {
2994 irq = regs[9] & 0xF000;
2995 irq = irq | (irq >> 4);
2996 irq = irq | (irq >> 8);
2997 if (irq != regs[9])
2998 return (MXSER_ERR_IRQ_CONFLIT);
2999 } else if (hwconf->ports == 8) {
3000 irq = regs[9] & 0xF000;
3001 irq = irq | (irq >> 4);
3002 irq = irq | (irq >> 8);
3003 if ((irq != regs[9]) || (irq != regs[10]))
3004 return (MXSER_ERR_IRQ_CONFLIT);
3005 }
3006
3007 if (!irq) {
3008 return (MXSER_ERR_IRQ);
3009 }
3010 hwconf->irq = ((int) (irq & 0xF000) >> 12);
3011 for (i = 0; i < 8; i++)
3012 hwconf->ioaddr[i] = (int) regs[i + 1] & 0xFFF8;
3013 if ((regs[12] & 0x80) == 0) {
3014 return (MXSER_ERR_VECTOR);
3015 }
3016 hwconf->vector = (int) regs[11]; /* interrupt vector */
3017 if (id == 1)
3018 hwconf->vector_mask = 0x00FF;
3019 else
3020 hwconf->vector_mask = 0x000F;
3021 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
3022 if (regs[12] & bits) {
3023 hwconf->baud_base[i] = 921600;
3024 hwconf->MaxCanSetBaudRate[i] = 921600; // add by Victor Yu. 09-04-2002
3025 } else {
3026 hwconf->baud_base[i] = 115200;
3027 hwconf->MaxCanSetBaudRate[i] = 115200; // add by Victor Yu. 09-04-2002
3028 }
3029 }
3030 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
3031 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
3032 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
3033 outb(scratch2, cap + UART_LCR);
3034 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
3035 scratch = inb(cap + UART_IIR);
3036
3037 if (scratch & 0xC0)
3038 hwconf->uart_type = PORT_16550A;
3039 else
3040 hwconf->uart_type = PORT_16450;
3041 if (id == 1)
3042 hwconf->ports = 8;
3043 else
3044 hwconf->ports = 4;
3045 request_region(hwconf->ioaddr[0], 8 * hwconf->ports, "mxser(IO)");
3046 request_region(hwconf->vector, 1, "mxser(vector)");
3047 return (hwconf->ports);
3048 }
3049
3050 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
3051 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
3052 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
3053 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
3054 #define EN_CCMD 0x000 /* Chip's command register */
3055 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
3056 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
3057 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
3058 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
3059 #define EN0_DCFG 0x00E /* Data configuration reg WR */
3060 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
3061 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
3062 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
3063 static int mxser_read_register(int port, unsigned short *regs)
3064 {
3065 int i, k, value, id;
3066 unsigned int j;
3067
3068 id = mxser_program_mode(port);
3069 if (id < 0)
3070 return (id);
3071 for (i = 0; i < 14; i++) {
3072 k = (i & 0x3F) | 0x180;
3073 for (j = 0x100; j > 0; j >>= 1) {
3074 outb(CHIP_CS, port);
3075 if (k & j) {
3076 outb(CHIP_CS | CHIP_DO, port);
3077 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
3078 } else {
3079 outb(CHIP_CS, port);
3080 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
3081 }
3082 }
3083 (void) inb(port);
3084 value = 0;
3085 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
3086 outb(CHIP_CS, port);
3087 outb(CHIP_CS | CHIP_SK, port);
3088 if (inb(port) & CHIP_DI)
3089 value |= j;
3090 }
3091 regs[i] = value;
3092 outb(0, port);
3093 }
3094 mxser_normal_mode(port);
3095 return (id);
3096 }
3097
3098 static int mxser_program_mode(int port)
3099 {
3100 int id, i, j, n;
3101 //unsigned long flags;
3102
3103 spin_lock(&gm_lock);
3104 outb(0, port);
3105 outb(0, port);
3106 outb(0, port);
3107 (void) inb(port);
3108 (void) inb(port);
3109 outb(0, port);
3110 (void) inb(port);
3111 //restore_flags(flags);
3112 spin_unlock(&gm_lock);
3113
3114 id = inb(port + 1) & 0x1F;
3115 if ((id != C168_ASIC_ID) && (id != C104_ASIC_ID) && (id != C102_ASIC_ID) && (id != CI132_ASIC_ID) && (id != CI134_ASIC_ID) && (id != CI104J_ASIC_ID))
3116 return (-1);
3117 for (i = 0, j = 0; i < 4; i++) {
3118 n = inb(port + 2);
3119 if (n == 'M') {
3120 j = 1;
3121 } else if ((j == 1) && (n == 1)) {
3122 j = 2;
3123 break;
3124 } else
3125 j = 0;
3126 }
3127 if (j != 2)
3128 id = -2;
3129 return (id);
3130 }
3131
3132 static void mxser_normal_mode(int port)
3133 {
3134 int i, n;
3135
3136 outb(0xA5, port + 1);
3137 outb(0x80, port + 3);
3138 outb(12, port + 0); /* 9600 bps */
3139 outb(0, port + 1);
3140 outb(0x03, port + 3); /* 8 data bits */
3141 outb(0x13, port + 4); /* loop back mode */
3142 for (i = 0; i < 16; i++) {
3143 n = inb(port + 5);
3144 if ((n & 0x61) == 0x60)
3145 break;
3146 if ((n & 1) == 1)
3147 (void) inb(port);
3148 }
3149 outb(0x00, port + 4);
3150 }
3151
3152 module_init(mxser_module_init);
3153 module_exit(mxser_module_exit);
kernel source for telekom puls (alcatel/mediatek)