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[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 set_current_state(TASK_INTERRUPTIBLE);
1062 schedule_timeout(5);
1063 if (time_after(jiffies, timeout))
1064 break;
1065 }
1066 }
1067 mxser_shutdown(info);
1068
1069 if (tty->driver->flush_buffer)
1070 tty->driver->flush_buffer(tty);
1071
1072 ld = tty_ldisc_ref(tty);
1073 if (ld) {
1074 if(ld->flush_buffer)
1075 ld->flush_buffer(tty);
1076 tty_ldisc_deref(ld);
1077 }
1078
1079 tty->closing = 0;
1080 info->event = 0;
1081 info->tty = NULL;
1082 if (info->blocked_open) {
1083 if (info->close_delay) {
1084 set_current_state(TASK_INTERRUPTIBLE);
1085 schedule_timeout(info->close_delay);
1086 }
1087 wake_up_interruptible(&info->open_wait);
1088 }
1089
1090 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1091 wake_up_interruptible(&info->close_wait);
1092
1093 }
1094
1095 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1096 {
1097 int c, total = 0;
1098 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1099 unsigned long flags;
1100
1101 if (!tty || !info->xmit_buf)
1102 return (0);
1103
1104 while (1) {
1105 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, SERIAL_XMIT_SIZE - info->xmit_head));
1106 if (c <= 0)
1107 break;
1108
1109 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1110 spin_lock_irqsave(&info->slock, flags);
1111 info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE - 1);
1112 info->xmit_cnt += c;
1113 spin_unlock_irqrestore(&info->slock, flags);
1114
1115 buf += c;
1116 count -= c;
1117 total += c;
1118
1119 }
1120
1121 if (info->xmit_cnt && !tty->stopped && !(info->IER & UART_IER_THRI)) {
1122 if (!tty->hw_stopped || (info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
1123 spin_lock_irqsave(&info->slock, flags);
1124 info->IER |= UART_IER_THRI;
1125 outb(info->IER, info->base + UART_IER);
1126 spin_unlock_irqrestore(&info->slock, flags);
1127 }
1128 }
1129 return total;
1130 }
1131
1132 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1133 {
1134 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1135 unsigned long flags;
1136
1137 if (!tty || !info->xmit_buf)
1138 return;
1139
1140 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1141 return;
1142
1143 spin_lock_irqsave(&info->slock, flags);
1144 info->xmit_buf[info->xmit_head++] = ch;
1145 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1146 info->xmit_cnt++;
1147 spin_unlock_irqrestore(&info->slock, flags);
1148 if (!tty->stopped && !(info->IER & UART_IER_THRI)) {
1149 if (!tty->hw_stopped || (info->type == PORT_16550A) || info->IsMoxaMustChipFlag) {
1150 spin_lock_irqsave(&info->slock, flags);
1151 info->IER |= UART_IER_THRI;
1152 outb(info->IER, info->base + UART_IER);
1153 spin_unlock_irqrestore(&info->slock, flags);
1154 }
1155 }
1156 }
1157
1158
1159 static void mxser_flush_chars(struct tty_struct *tty)
1160 {
1161 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1162 unsigned long flags;
1163
1164 if (info->xmit_cnt <= 0 || tty->stopped || !info->xmit_buf || (tty->hw_stopped && (info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)))
1165 return;
1166
1167 spin_lock_irqsave(&info->slock, flags);
1168
1169 info->IER |= UART_IER_THRI;
1170 outb(info->IER, info->base + UART_IER);
1171
1172 spin_unlock_irqrestore(&info->slock, flags);
1173 }
1174
1175 static int mxser_write_room(struct tty_struct *tty)
1176 {
1177 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1178 int ret;
1179
1180 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1181 if (ret < 0)
1182 ret = 0;
1183 return (ret);
1184 }
1185
1186 static int mxser_chars_in_buffer(struct tty_struct *tty)
1187 {
1188 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1189 return info->xmit_cnt;
1190 }
1191
1192 static void mxser_flush_buffer(struct tty_struct *tty)
1193 {
1194 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1195 char fcr;
1196 unsigned long flags;
1197
1198
1199 spin_lock_irqsave(&info->slock, flags);
1200 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1201
1202 /* below added by shinhay */
1203 fcr = inb(info->base + UART_FCR);
1204 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
1205 outb(fcr, info->base + UART_FCR);
1206
1207 spin_unlock_irqrestore(&info->slock, flags);
1208 /* above added by shinhay */
1209
1210 wake_up_interruptible(&tty->write_wait);
1211 if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
1212 (tty->ldisc.write_wakeup) (tty);
1213 }
1214
1215 static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1216 {
1217 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1218 int retval;
1219 struct async_icount cprev, cnow; /* kernel counter temps */
1220 struct serial_icounter_struct __user *p_cuser;
1221 unsigned long templ;
1222 unsigned long flags;
1223 void __user *argp = (void __user *)arg;
1224
1225 if (tty->index == MXSER_PORTS)
1226 return (mxser_ioctl_special(cmd, argp));
1227
1228 // following add by Victor Yu. 01-05-2004
1229 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1230 int opmode, p;
1231 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1232 int shiftbit;
1233 unsigned char val, mask;
1234
1235 p = info->port % 4;
1236 if (cmd == MOXA_SET_OP_MODE) {
1237 if (get_user(opmode, (int __user *) argp))
1238 return -EFAULT;
1239 if (opmode != RS232_MODE && opmode != RS485_2WIRE_MODE && opmode != RS422_MODE && opmode != RS485_4WIRE_MODE)
1240 return -EFAULT;
1241 mask = ModeMask[p];
1242 shiftbit = p * 2;
1243 val = inb(info->opmode_ioaddr);
1244 val &= mask;
1245 val |= (opmode << shiftbit);
1246 outb(val, info->opmode_ioaddr);
1247 } else {
1248 shiftbit = p * 2;
1249 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1250 opmode &= OP_MODE_MASK;
1251 if (copy_to_user(argp, &opmode, sizeof(int)))
1252 return -EFAULT;
1253 }
1254 return 0;
1255 }
1256 // above add by Victor Yu. 01-05-2004
1257
1258 if ((cmd != TIOCGSERIAL) && (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1259 if (tty->flags & (1 << TTY_IO_ERROR))
1260 return (-EIO);
1261 }
1262 switch (cmd) {
1263 case TCSBRK: /* SVID version: non-zero arg --> no break */
1264 retval = tty_check_change(tty);
1265 if (retval)
1266 return (retval);
1267 tty_wait_until_sent(tty, 0);
1268 if (!arg)
1269 mxser_send_break(info, HZ / 4); /* 1/4 second */
1270 return (0);
1271 case TCSBRKP: /* support for POSIX tcsendbreak() */
1272 retval = tty_check_change(tty);
1273 if (retval)
1274 return (retval);
1275 tty_wait_until_sent(tty, 0);
1276 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1277 return (0);
1278 case TIOCGSOFTCAR:
1279 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *) argp);
1280 case TIOCSSOFTCAR:
1281 if (get_user(templ, (unsigned long __user *) argp))
1282 return -EFAULT;
1283 arg = templ;
1284 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1285 return (0);
1286 case TIOCGSERIAL:
1287 return mxser_get_serial_info(info, argp);
1288 case TIOCSSERIAL:
1289 return mxser_set_serial_info(info, argp);
1290 case TIOCSERGETLSR: /* Get line status register */
1291 return mxser_get_lsr_info(info, argp);
1292 /*
1293 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1294 * - mask passed in arg for lines of interest
1295 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1296 * Caller should use TIOCGICOUNT to see which one it was
1297 */
1298 case TIOCMIWAIT:{
1299 DECLARE_WAITQUEUE(wait, current);
1300 int ret;
1301 spin_lock_irqsave(&info->slock, flags);
1302 cprev = info->icount; /* note the counters on entry */
1303 spin_unlock_irqrestore(&info->slock, flags);
1304
1305 add_wait_queue(&info->delta_msr_wait, &wait);
1306 while (1) {
1307 spin_lock_irqsave(&info->slock, flags);
1308 cnow = info->icount; /* atomic copy */
1309 spin_unlock_irqrestore(&info->slock, flags);
1310
1311 set_current_state(TASK_INTERRUPTIBLE);
1312 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))) {
1313 ret = 0;
1314 break;
1315 }
1316 /* see if a signal did it */
1317 if (signal_pending(current)) {
1318 ret = -ERESTARTSYS;
1319 break;
1320 }
1321 cprev = cnow;
1322 }
1323 current->state = TASK_RUNNING;
1324 remove_wait_queue(&info->delta_msr_wait, &wait);
1325 break;
1326 }
1327 /* NOTREACHED */
1328 /*
1329 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1330 * Return: write counters to the user passed counter struct
1331 * NB: both 1->0 and 0->1 transitions are counted except for
1332 * RI where only 0->1 is counted.
1333 */
1334 case TIOCGICOUNT:
1335 spin_lock_irqsave(&info->slock, flags);
1336 cnow = info->icount;
1337 spin_unlock_irqrestore(&info->slock, flags);
1338 p_cuser = argp;
1339 /* modified by casper 1/11/2000 */
1340 if (put_user(cnow.frame, &p_cuser->frame))
1341 return -EFAULT;
1342 if (put_user(cnow.brk, &p_cuser->brk))
1343 return -EFAULT;
1344 if (put_user(cnow.overrun, &p_cuser->overrun))
1345 return -EFAULT;
1346 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1347 return -EFAULT;
1348 if (put_user(cnow.parity, &p_cuser->parity))
1349 return -EFAULT;
1350 if (put_user(cnow.rx, &p_cuser->rx))
1351 return -EFAULT;
1352 if (put_user(cnow.tx, &p_cuser->tx))
1353 return -EFAULT;
1354 put_user(cnow.cts, &p_cuser->cts);
1355 put_user(cnow.dsr, &p_cuser->dsr);
1356 put_user(cnow.rng, &p_cuser->rng);
1357 put_user(cnow.dcd, &p_cuser->dcd);
1358
1359 /* */
1360 return 0;
1361 case MOXA_HighSpeedOn:
1362 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *) argp);
1363
1364 case MOXA_SDS_RSTICOUNTER:{
1365 info->mon_data.rxcnt = 0;
1366 info->mon_data.txcnt = 0;
1367 return 0;
1368 }
1369 // (above) added by James.
1370 case MOXA_ASPP_SETBAUD:{
1371 long baud;
1372 if (get_user(baud, (long __user *) argp))
1373 return -EFAULT;
1374 mxser_set_baud(info, baud);
1375 return 0;
1376 }
1377 case MOXA_ASPP_GETBAUD:
1378 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1379 return -EFAULT;
1380
1381 return 0;
1382
1383 case MOXA_ASPP_OQUEUE:{
1384 int len, lsr;
1385
1386 len = mxser_chars_in_buffer(tty);
1387
1388 lsr = inb(info->base + UART_LSR) & UART_LSR_TEMT;
1389
1390 len += (lsr ? 0 : 1);
1391
1392 if (copy_to_user(argp, &len, sizeof(int)))
1393 return -EFAULT;
1394
1395 return 0;
1396 }
1397 case MOXA_ASPP_MON:{
1398 int mcr, status;
1399 // info->mon_data.ser_param = tty->termios->c_cflag;
1400
1401 status = mxser_get_msr(info->base, 1, info->port, info);
1402 mxser_check_modem_status(info, status);
1403
1404 mcr = inb(info->base + UART_MCR);
1405 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1406 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1407 else
1408 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1409
1410 if (mcr & MOXA_MUST_MCR_TX_XON)
1411 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1412 else
1413 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1414
1415 if (info->tty->hw_stopped)
1416 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1417 else
1418 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1419
1420
1421 if (copy_to_user(argp, &info->mon_data, sizeof(struct mxser_mon)))
1422 return -EFAULT;
1423
1424 return 0;
1425
1426 }
1427
1428 case MOXA_ASPP_LSTATUS:{
1429 if (copy_to_user(argp, &info->err_shadow, sizeof(unsigned char)))
1430 return -EFAULT;
1431
1432 info->err_shadow = 0;
1433 return 0;
1434
1435 }
1436 case MOXA_SET_BAUD_METHOD:{
1437 int method;
1438 if (get_user(method, (int __user *) argp))
1439 return -EFAULT;
1440 mxser_set_baud_method[info->port] = method;
1441 if (copy_to_user(argp, &method, sizeof(int)))
1442 return -EFAULT;
1443
1444 return 0;
1445 }
1446 default:
1447 return -ENOIOCTLCMD;
1448 }
1449 return 0;
1450 }
1451
1452 #ifndef CMSPAR
1453 #define CMSPAR 010000000000
1454 #endif
1455
1456 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1457 {
1458 int i, result, status;
1459
1460 switch (cmd) {
1461 case MOXA_GET_CONF:
1462 if (copy_to_user(argp, mxsercfg, sizeof(struct mxser_hwconf) * 4))
1463 return -EFAULT;
1464 return 0;
1465 case MOXA_GET_MAJOR:
1466 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1467 return -EFAULT;
1468 return 0;
1469
1470 case MOXA_GET_CUMAJOR:
1471 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1472 return -EFAULT;
1473 return 0;
1474
1475 case MOXA_CHKPORTENABLE:
1476 result = 0;
1477 for (i = 0; i < MXSER_PORTS; i++) {
1478 if (mxvar_table[i].base)
1479 result |= (1 << i);
1480 }
1481 return put_user(result, (unsigned long __user *) argp);
1482 case MOXA_GETDATACOUNT:
1483 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1484 return -EFAULT;
1485 return (0);
1486 case MOXA_GETMSTATUS:
1487 for (i = 0; i < MXSER_PORTS; i++) {
1488 GMStatus[i].ri = 0;
1489 if (!mxvar_table[i].base) {
1490 GMStatus[i].dcd = 0;
1491 GMStatus[i].dsr = 0;
1492 GMStatus[i].cts = 0;
1493 continue;
1494 }
1495
1496 if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios)
1497 GMStatus[i].cflag = mxvar_table[i].normal_termios.c_cflag;
1498 else
1499 GMStatus[i].cflag = mxvar_table[i].tty->termios->c_cflag;
1500
1501 status = inb(mxvar_table[i].base + UART_MSR);
1502 if (status & 0x80 /*UART_MSR_DCD */ )
1503 GMStatus[i].dcd = 1;
1504 else
1505 GMStatus[i].dcd = 0;
1506
1507 if (status & 0x20 /*UART_MSR_DSR */ )
1508 GMStatus[i].dsr = 1;
1509 else
1510 GMStatus[i].dsr = 0;
1511
1512
1513 if (status & 0x10 /*UART_MSR_CTS */ )
1514 GMStatus[i].cts = 1;
1515 else
1516 GMStatus[i].cts = 0;
1517 }
1518 if (copy_to_user(argp, GMStatus, sizeof(struct mxser_mstatus) * MXSER_PORTS))
1519 return -EFAULT;
1520 return 0;
1521 case MOXA_ASPP_MON_EXT:{
1522 int status;
1523 int opmode, p;
1524 int shiftbit;
1525 unsigned cflag, iflag;
1526
1527 for (i = 0; i < MXSER_PORTS; i++) {
1528
1529 if (!mxvar_table[i].base)
1530 continue;
1531
1532 status = mxser_get_msr(mxvar_table[i].base, 0, i, &(mxvar_table[i]));
1533 // mxser_check_modem_status(&mxvar_table[i], status);
1534 if (status & UART_MSR_TERI)
1535 mxvar_table[i].icount.rng++;
1536 if (status & UART_MSR_DDSR)
1537 mxvar_table[i].icount.dsr++;
1538 if (status & UART_MSR_DDCD)
1539 mxvar_table[i].icount.dcd++;
1540 if (status & UART_MSR_DCTS)
1541 mxvar_table[i].icount.cts++;
1542
1543 mxvar_table[i].mon_data.modem_status = status;
1544 mon_data_ext.rx_cnt[i] = mxvar_table[i].mon_data.rxcnt;
1545 mon_data_ext.tx_cnt[i] = mxvar_table[i].mon_data.txcnt;
1546 mon_data_ext.up_rxcnt[i] = mxvar_table[i].mon_data.up_rxcnt;
1547 mon_data_ext.up_txcnt[i] = mxvar_table[i].mon_data.up_txcnt;
1548 mon_data_ext.modem_status[i] = mxvar_table[i].mon_data.modem_status;
1549 mon_data_ext.baudrate[i] = mxvar_table[i].realbaud;
1550
1551 if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios) {
1552 cflag = mxvar_table[i].normal_termios.c_cflag;
1553 iflag = mxvar_table[i].normal_termios.c_iflag;
1554 } else {
1555 cflag = mxvar_table[i].tty->termios->c_cflag;
1556 iflag = mxvar_table[i].tty->termios->c_iflag;
1557 }
1558
1559 mon_data_ext.databits[i] = cflag & CSIZE;
1560
1561 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1562
1563 mon_data_ext.parity[i] = cflag & (PARENB | PARODD | CMSPAR);
1564
1565 mon_data_ext.flowctrl[i] = 0x00;
1566
1567 if (cflag & CRTSCTS)
1568 mon_data_ext.flowctrl[i] |= 0x03;
1569
1570 if (iflag & (IXON | IXOFF))
1571 mon_data_ext.flowctrl[i] |= 0x0C;
1572
1573 if (mxvar_table[i].type == PORT_16550A)
1574 mon_data_ext.fifo[i] = 1;
1575 else
1576 mon_data_ext.fifo[i] = 0;
1577
1578 p = i % 4;
1579 shiftbit = p * 2;
1580 opmode = inb(mxvar_table[i].opmode_ioaddr) >> shiftbit;
1581 opmode &= OP_MODE_MASK;
1582
1583 mon_data_ext.iftype[i] = opmode;
1584
1585 }
1586 if (copy_to_user(argp, &mon_data_ext, sizeof(struct mxser_mon_ext)))
1587 return -EFAULT;
1588
1589 return 0;
1590
1591 }
1592 default:
1593 return -ENOIOCTLCMD;
1594 }
1595 return 0;
1596 }
1597
1598
1599 static void mxser_stoprx(struct tty_struct *tty)
1600 {
1601 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1602 //unsigned long flags;
1603
1604
1605 info->ldisc_stop_rx = 1;
1606 if (I_IXOFF(tty)) {
1607
1608 //MX_LOCK(&info->slock);
1609 // following add by Victor Yu. 09-02-2002
1610 if (info->IsMoxaMustChipFlag) {
1611 info->IER &= ~MOXA_MUST_RECV_ISR;
1612 outb(info->IER, info->base + UART_IER);
1613 } else {
1614 // above add by Victor Yu. 09-02-2002
1615
1616 info->x_char = STOP_CHAR(tty);
1617 // outb(info->IER, 0); // mask by Victor Yu. 09-02-2002
1618 outb(0, info->base + UART_IER);
1619 info->IER |= UART_IER_THRI;
1620 outb(info->IER, info->base + UART_IER); /* force Tx interrupt */
1621 } // add by Victor Yu. 09-02-2002
1622 //MX_UNLOCK(&info->slock);
1623 }
1624
1625 if (info->tty->termios->c_cflag & CRTSCTS) {
1626 //MX_LOCK(&info->slock);
1627 info->MCR &= ~UART_MCR_RTS;
1628 outb(info->MCR, info->base + UART_MCR);
1629 //MX_UNLOCK(&info->slock);
1630 }
1631 }
1632
1633 static void mxser_startrx(struct tty_struct *tty)
1634 {
1635 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1636 //unsigned long flags;
1637
1638 info->ldisc_stop_rx = 0;
1639 if (I_IXOFF(tty)) {
1640 if (info->x_char)
1641 info->x_char = 0;
1642 else {
1643 //MX_LOCK(&info->slock);
1644
1645 // following add by Victor Yu. 09-02-2002
1646 if (info->IsMoxaMustChipFlag) {
1647 info->IER |= MOXA_MUST_RECV_ISR;
1648 outb(info->IER, info->base + UART_IER);
1649 } else {
1650 // above add by Victor Yu. 09-02-2002
1651
1652 info->x_char = START_CHAR(tty);
1653 // outb(info->IER, 0); // mask by Victor Yu. 09-02-2002
1654 outb(0, info->base + UART_IER); // add by Victor Yu. 09-02-2002
1655 info->IER |= UART_IER_THRI; /* force Tx interrupt */
1656 outb(info->IER, info->base + UART_IER);
1657 } // add by Victor Yu. 09-02-2002
1658 //MX_UNLOCK(&info->slock);
1659 }
1660 }
1661
1662 if (info->tty->termios->c_cflag & CRTSCTS) {
1663 //MX_LOCK(&info->slock);
1664 info->MCR |= UART_MCR_RTS;
1665 outb(info->MCR, info->base + UART_MCR);
1666 //MX_UNLOCK(&info->slock);
1667 }
1668 }
1669
1670 /*
1671 * This routine is called by the upper-layer tty layer to signal that
1672 * incoming characters should be throttled.
1673 */
1674 static void mxser_throttle(struct tty_struct *tty)
1675 {
1676 //struct mxser_struct *info = (struct mxser_struct *)tty->driver_data;
1677 //unsigned long flags;
1678 //MX_LOCK(&info->slock);
1679 mxser_stoprx(tty);
1680 //MX_UNLOCK(&info->slock);
1681 }
1682
1683 static void mxser_unthrottle(struct tty_struct *tty)
1684 {
1685 //struct mxser_struct *info = (struct mxser_struct *)tty->driver_data;
1686 //unsigned long flags;
1687 //MX_LOCK(&info->slock);
1688 mxser_startrx(tty);
1689 //MX_UNLOCK(&info->slock);
1690 }
1691
1692 static void mxser_set_termios(struct tty_struct *tty, struct termios *old_termios)
1693 {
1694 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1695 unsigned long flags;
1696
1697 if ((tty->termios->c_cflag != old_termios->c_cflag) || (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
1698
1699 mxser_change_speed(info, old_termios);
1700
1701 if ((old_termios->c_cflag & CRTSCTS) && !(tty->termios->c_cflag & CRTSCTS)) {
1702 tty->hw_stopped = 0;
1703 mxser_start(tty);
1704 }
1705 }
1706
1707 /* Handle sw stopped */
1708 if ((old_termios->c_iflag & IXON) && !(tty->termios->c_iflag & IXON)) {
1709 tty->stopped = 0;
1710
1711 // following add by Victor Yu. 09-02-2002
1712 if (info->IsMoxaMustChipFlag) {
1713 spin_lock_irqsave(&info->slock, flags);
1714 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
1715 spin_unlock_irqrestore(&info->slock, flags);
1716 }
1717 // above add by Victor Yu. 09-02-2002
1718
1719 mxser_start(tty);
1720 }
1721 }
1722
1723 /*
1724 * mxser_stop() and mxser_start()
1725 *
1726 * This routines are called before setting or resetting tty->stopped.
1727 * They enable or disable transmitter interrupts, as necessary.
1728 */
1729 static void mxser_stop(struct tty_struct *tty)
1730 {
1731 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1732 unsigned long flags;
1733
1734 spin_lock_irqsave(&info->slock, flags);
1735 if (info->IER & UART_IER_THRI) {
1736 info->IER &= ~UART_IER_THRI;
1737 outb(info->IER, info->base + UART_IER);
1738 }
1739 spin_unlock_irqrestore(&info->slock, flags);
1740 }
1741
1742 static void mxser_start(struct tty_struct *tty)
1743 {
1744 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1745 unsigned long flags;
1746
1747 spin_lock_irqsave(&info->slock, flags);
1748 if (info->xmit_cnt && info->xmit_buf && !(info->IER & UART_IER_THRI)) {
1749 info->IER |= UART_IER_THRI;
1750 outb(info->IER, info->base + UART_IER);
1751 }
1752 spin_unlock_irqrestore(&info->slock, flags);
1753 }
1754
1755 /*
1756 * mxser_wait_until_sent() --- wait until the transmitter is empty
1757 */
1758 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1759 {
1760 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1761 unsigned long orig_jiffies, char_time;
1762 int lsr;
1763
1764 if (info->type == PORT_UNKNOWN)
1765 return;
1766
1767 if (info->xmit_fifo_size == 0)
1768 return; /* Just in case.... */
1769
1770 orig_jiffies = jiffies;
1771 /*
1772 * Set the check interval to be 1/5 of the estimated time to
1773 * send a single character, and make it at least 1. The check
1774 * interval should also be less than the timeout.
1775 *
1776 * Note: we have to use pretty tight timings here to satisfy
1777 * the NIST-PCTS.
1778 */
1779 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1780 char_time = char_time / 5;
1781 if (char_time == 0)
1782 char_time = 1;
1783 if (timeout && timeout < char_time)
1784 char_time = timeout;
1785 /*
1786 * If the transmitter hasn't cleared in twice the approximate
1787 * amount of time to send the entire FIFO, it probably won't
1788 * ever clear. This assumes the UART isn't doing flow
1789 * control, which is currently the case. Hence, if it ever
1790 * takes longer than info->timeout, this is probably due to a
1791 * UART bug of some kind. So, we clamp the timeout parameter at
1792 * 2*info->timeout.
1793 */
1794 if (!timeout || timeout > 2 * info->timeout)
1795 timeout = 2 * info->timeout;
1796 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1797 printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...", timeout, char_time);
1798 printk("jiff=%lu...", jiffies);
1799 #endif
1800 while (!((lsr = inb(info->base + UART_LSR)) & UART_LSR_TEMT)) {
1801 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1802 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1803 #endif
1804 set_current_state(TASK_INTERRUPTIBLE);
1805 schedule_timeout(char_time);
1806 if (signal_pending(current))
1807 break;
1808 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1809 break;
1810 }
1811 set_current_state(TASK_RUNNING);
1812
1813 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1814 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1815 #endif
1816 }
1817
1818
1819 /*
1820 * This routine is called by tty_hangup() when a hangup is signaled.
1821 */
1822 void mxser_hangup(struct tty_struct *tty)
1823 {
1824 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1825
1826 mxser_flush_buffer(tty);
1827 mxser_shutdown(info);
1828 info->event = 0;
1829 info->count = 0;
1830 info->flags &= ~ASYNC_NORMAL_ACTIVE;
1831 info->tty = NULL;
1832 wake_up_interruptible(&info->open_wait);
1833 }
1834
1835
1836 // added by James 03-12-2004.
1837 /*
1838 * mxser_rs_break() --- routine which turns the break handling on or off
1839 */
1840 static void mxser_rs_break(struct tty_struct *tty, int break_state)
1841 {
1842 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1843 unsigned long flags;
1844
1845 spin_lock_irqsave(&info->slock, flags);
1846 if (break_state == -1)
1847 outb(inb(info->base + UART_LCR) | UART_LCR_SBC, info->base + UART_LCR);
1848 else
1849 outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC, info->base + UART_LCR);
1850 spin_unlock_irqrestore(&info->slock, flags);
1851 }
1852
1853 // (above) added by James.
1854
1855
1856 /*
1857 * This is the serial driver's generic interrupt routine
1858 */
1859 static irqreturn_t mxser_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1860 {
1861 int status, iir, i;
1862 struct mxser_struct *info;
1863 struct mxser_struct *port;
1864 int max, irqbits, bits, msr;
1865 int pass_counter = 0;
1866 int handled = IRQ_NONE;
1867
1868 port = NULL;
1869 //spin_lock(&gm_lock);
1870
1871 for (i = 0; i < MXSER_BOARDS; i++) {
1872 if (dev_id == &(mxvar_table[i * MXSER_PORTS_PER_BOARD])) {
1873 port = dev_id;
1874 break;
1875 }
1876 }
1877
1878 if (i == MXSER_BOARDS) {
1879 goto irq_stop;
1880 }
1881 if (port == 0) {
1882 goto irq_stop;
1883 }
1884 max = mxser_numports[mxsercfg[i].board_type - 1];
1885 while (1) {
1886 irqbits = inb(port->vector) & port->vectormask;
1887 if (irqbits == port->vectormask) {
1888 break;
1889 }
1890
1891 handled = IRQ_HANDLED;
1892 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
1893 if (irqbits == port->vectormask) {
1894 break;
1895 }
1896 if (bits & irqbits)
1897 continue;
1898 info = port + i;
1899
1900 // following add by Victor Yu. 09-13-2002
1901 iir = inb(info->base + UART_IIR);
1902 if (iir & UART_IIR_NO_INT)
1903 continue;
1904 iir &= MOXA_MUST_IIR_MASK;
1905 if (!info->tty) {
1906 status = inb(info->base + UART_LSR);
1907 outb(0x27, info->base + UART_FCR);
1908 inb(info->base + UART_MSR);
1909 continue;
1910 }
1911 // above add by Victor Yu. 09-13-2002
1912 /*
1913 if ( info->tty->flip.count < TTY_FLIPBUF_SIZE/4 ){
1914 info->IER |= MOXA_MUST_RECV_ISR;
1915 outb(info->IER, info->base + UART_IER);
1916 }
1917 */
1918
1919
1920 /* mask by Victor Yu. 09-13-2002
1921 if ( !info->tty ||
1922 (inb(info->base + UART_IIR) & UART_IIR_NO_INT) )
1923 continue;
1924 */
1925 /* mask by Victor Yu. 09-02-2002
1926 status = inb(info->base + UART_LSR) & info->read_status_mask;
1927 */
1928
1929 // following add by Victor Yu. 09-02-2002
1930 status = inb(info->base + UART_LSR);
1931
1932 if (status & UART_LSR_PE) {
1933 info->err_shadow |= NPPI_NOTIFY_PARITY;
1934 }
1935 if (status & UART_LSR_FE) {
1936 info->err_shadow |= NPPI_NOTIFY_FRAMING;
1937 }
1938 if (status & UART_LSR_OE) {
1939 info->err_shadow |= NPPI_NOTIFY_HW_OVERRUN;
1940 }
1941 if (status & UART_LSR_BI)
1942 info->err_shadow |= NPPI_NOTIFY_BREAK;
1943
1944 if (info->IsMoxaMustChipFlag) {
1945 /*
1946 if ( (status & 0x02) && !(status & 0x01) ) {
1947 outb(info->base+UART_FCR, 0x23);
1948 continue;
1949 }
1950 */
1951 if (iir == MOXA_MUST_IIR_GDA || iir == MOXA_MUST_IIR_RDA || iir == MOXA_MUST_IIR_RTO || iir == MOXA_MUST_IIR_LSR)
1952 mxser_receive_chars(info, &status);
1953
1954 } else {
1955 // above add by Victor Yu. 09-02-2002
1956
1957 status &= info->read_status_mask;
1958 if (status & UART_LSR_DR)
1959 mxser_receive_chars(info, &status);
1960 }
1961 msr = inb(info->base + UART_MSR);
1962 if (msr & UART_MSR_ANY_DELTA) {
1963 mxser_check_modem_status(info, msr);
1964 }
1965 // following add by Victor Yu. 09-13-2002
1966 if (info->IsMoxaMustChipFlag) {
1967 if ((iir == 0x02) && (status & UART_LSR_THRE)) {
1968 mxser_transmit_chars(info);
1969 }
1970 } else {
1971 // above add by Victor Yu. 09-13-2002
1972
1973 if (status & UART_LSR_THRE) {
1974 /* 8-2-99 by William
1975 if ( info->x_char || (info->xmit_cnt > 0) )
1976 */
1977 mxser_transmit_chars(info);
1978 }
1979 }
1980 }
1981 if (pass_counter++ > MXSER_ISR_PASS_LIMIT) {
1982 break; /* Prevent infinite loops */
1983 }
1984 }
1985
1986 irq_stop:
1987 //spin_unlock(&gm_lock);
1988 return handled;
1989 }
1990
1991 static void mxser_receive_chars(struct mxser_struct *info, int *status)
1992 {
1993 struct tty_struct *tty = info->tty;
1994 unsigned char ch, gdl;
1995 int ignored = 0;
1996 int cnt = 0;
1997 int recv_room;
1998 int max = 256;
1999 unsigned long flags;
2000
2001 spin_lock_irqsave(&info->slock, flags);
2002
2003 recv_room = tty->ldisc.receive_room(tty);
2004 if ((recv_room == 0) && (!info->ldisc_stop_rx)) {
2005 //mxser_throttle(tty);
2006 mxser_stoprx(tty);
2007 //return;
2008 }
2009
2010 // following add by Victor Yu. 09-02-2002
2011 if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
2012
2013 if (*status & UART_LSR_SPECIAL) {
2014 goto intr_old;
2015 }
2016 // following add by Victor Yu. 02-11-2004
2017 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID && (*status & MOXA_MUST_LSR_RERR))
2018 goto intr_old;
2019 // above add by Victor Yu. 02-14-2004
2020 if (*status & MOXA_MUST_LSR_RERR)
2021 goto intr_old;
2022
2023 gdl = inb(info->base + MOXA_MUST_GDL_REGISTER);
2024
2025 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU150_HWID) // add by Victor Yu. 02-11-2004
2026 gdl &= MOXA_MUST_GDL_MASK;
2027 if (gdl >= recv_room) {
2028 if (!info->ldisc_stop_rx) {
2029 //mxser_throttle(tty);
2030 mxser_stoprx(tty);
2031 }
2032 //return;
2033 }
2034 while (gdl--) {
2035 ch = inb(info->base + UART_RX);
2036 tty_insert_flip_char(tty, ch, 0);
2037 cnt++;
2038 /*
2039 if((cnt>=HI_WATER) && (info->stop_rx==0)){
2040 mxser_stoprx(tty);
2041 info->stop_rx=1;
2042 break;
2043 } */
2044 }
2045 goto end_intr;
2046 }
2047 intr_old:
2048 // above add by Victor Yu. 09-02-2002
2049
2050 do {
2051 if (max-- < 0)
2052 break;
2053 /*
2054 if((cnt>=HI_WATER) && (info->stop_rx==0)){
2055 mxser_stoprx(tty);
2056 info->stop_rx=1;
2057 break;
2058 }
2059 */
2060
2061 ch = inb(info->base + UART_RX);
2062 // following add by Victor Yu. 09-02-2002
2063 if (info->IsMoxaMustChipFlag && (*status & UART_LSR_OE) /*&& !(*status&UART_LSR_DR) */ )
2064 outb(0x23, info->base + UART_FCR);
2065 *status &= info->read_status_mask;
2066 // above add by Victor Yu. 09-02-2002
2067 if (*status & info->ignore_status_mask) {
2068 if (++ignored > 100)
2069 break;
2070 } else {
2071 char flag = 0;
2072 if (*status & UART_LSR_SPECIAL) {
2073 if (*status & UART_LSR_BI) {
2074 flag = TTY_BREAK;
2075 /* added by casper 1/11/2000 */
2076 info->icount.brk++;
2077 /* */
2078 if (info->flags & ASYNC_SAK)
2079 do_SAK(tty);
2080 } else if (*status & UART_LSR_PE) {
2081 flag = TTY_PARITY;
2082 /* added by casper 1/11/2000 */
2083 info->icount.parity++;
2084 /* */
2085 } else if (*status & UART_LSR_FE) {
2086 flag = TTY_FRAME;
2087 /* added by casper 1/11/2000 */
2088 info->icount.frame++;
2089 /* */
2090 } else if (*status & UART_LSR_OE) {
2091 flag = TTY_OVERRUN;
2092 /* added by casper 1/11/2000 */
2093 info->icount.overrun++;
2094 /* */
2095 }
2096 }
2097 tty_insert_flip_char(tty, ch, flag);
2098 cnt++;
2099 if (cnt >= recv_room) {
2100 if (!info->ldisc_stop_rx) {
2101 //mxser_throttle(tty);
2102 mxser_stoprx(tty);
2103 }
2104 break;
2105 }
2106
2107 }
2108
2109 // following add by Victor Yu. 09-02-2002
2110 if (info->IsMoxaMustChipFlag)
2111 break;
2112 // above add by Victor Yu. 09-02-2002
2113
2114 /* mask by Victor Yu. 09-02-2002
2115 *status = inb(info->base + UART_LSR) & info->read_status_mask;
2116 */
2117 // following add by Victor Yu. 09-02-2002
2118 *status = inb(info->base + UART_LSR);
2119 // above add by Victor Yu. 09-02-2002
2120 } while (*status & UART_LSR_DR);
2121
2122 end_intr: // add by Victor Yu. 09-02-2002
2123
2124 mxvar_log.rxcnt[info->port] += cnt;
2125 info->mon_data.rxcnt += cnt;
2126 info->mon_data.up_rxcnt += cnt;
2127 spin_unlock_irqrestore(&info->slock, flags);
2128
2129 tty_flip_buffer_push(tty);
2130 }
2131
2132 static void mxser_transmit_chars(struct mxser_struct *info)
2133 {
2134 int count, cnt;
2135 unsigned long flags;
2136
2137 spin_lock_irqsave(&info->slock, flags);
2138
2139 if (info->x_char) {
2140 outb(info->x_char, info->base + UART_TX);
2141 info->x_char = 0;
2142 mxvar_log.txcnt[info->port]++;
2143 info->mon_data.txcnt++;
2144 info->mon_data.up_txcnt++;
2145
2146 /* added by casper 1/11/2000 */
2147 info->icount.tx++;
2148 /* */
2149 spin_unlock_irqrestore(&info->slock, flags);
2150 return;
2151 }
2152
2153 if (info->xmit_buf == 0) {
2154 spin_unlock_irqrestore(&info->slock, flags);
2155 return;
2156 }
2157
2158 if ((info->xmit_cnt <= 0) || info->tty->stopped || (info->tty->hw_stopped && (info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag))) {
2159 info->IER &= ~UART_IER_THRI;
2160 outb(info->IER, info->base + UART_IER);
2161 spin_unlock_irqrestore(&info->slock, flags);
2162 return;
2163 }
2164
2165 cnt = info->xmit_cnt;
2166 count = info->xmit_fifo_size;
2167 do {
2168 outb(info->xmit_buf[info->xmit_tail++], info->base + UART_TX);
2169 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2170 if (--info->xmit_cnt <= 0)
2171 break;
2172 } while (--count > 0);
2173 mxvar_log.txcnt[info->port] += (cnt - info->xmit_cnt);
2174
2175 // added by James 03-12-2004.
2176 info->mon_data.txcnt += (cnt - info->xmit_cnt);
2177 info->mon_data.up_txcnt += (cnt - info->xmit_cnt);
2178 // (above) added by James.
2179
2180 /* added by casper 1/11/2000 */
2181 info->icount.tx += (cnt - info->xmit_cnt);
2182 /* */
2183
2184 if (info->xmit_cnt < WAKEUP_CHARS) {
2185 set_bit(MXSER_EVENT_TXLOW, &info->event);
2186 schedule_work(&info->tqueue);
2187 }
2188 if (info->xmit_cnt <= 0) {
2189 info->IER &= ~UART_IER_THRI;
2190 outb(info->IER, info->base + UART_IER);
2191 }
2192 spin_unlock_irqrestore(&info->slock, flags);
2193 }
2194
2195 static void mxser_check_modem_status(struct mxser_struct *info, int status)
2196 {
2197 /* update input line counters */
2198 if (status & UART_MSR_TERI)
2199 info->icount.rng++;
2200 if (status & UART_MSR_DDSR)
2201 info->icount.dsr++;
2202 if (status & UART_MSR_DDCD)
2203 info->icount.dcd++;
2204 if (status & UART_MSR_DCTS)
2205 info->icount.cts++;
2206 info->mon_data.modem_status = status;
2207 wake_up_interruptible(&info->delta_msr_wait);
2208
2209
2210 if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
2211 if (status & UART_MSR_DCD)
2212 wake_up_interruptible(&info->open_wait);
2213 schedule_work(&info->tqueue);
2214 }
2215
2216 if (info->flags & ASYNC_CTS_FLOW) {
2217 if (info->tty->hw_stopped) {
2218 if (status & UART_MSR_CTS) {
2219 info->tty->hw_stopped = 0;
2220
2221 if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2222 info->IER |= UART_IER_THRI;
2223 outb(info->IER, info->base + UART_IER);
2224 }
2225 set_bit(MXSER_EVENT_TXLOW, &info->event);
2226 schedule_work(&info->tqueue); }
2227 } else {
2228 if (!(status & UART_MSR_CTS)) {
2229 info->tty->hw_stopped = 1;
2230 if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2231 info->IER &= ~UART_IER_THRI;
2232 outb(info->IER, info->base + UART_IER);
2233 }
2234 }
2235 }
2236 }
2237 }
2238
2239 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, struct mxser_struct *info)
2240 {
2241 DECLARE_WAITQUEUE(wait, current);
2242 int retval;
2243 int do_clocal = 0;
2244 unsigned long flags;
2245
2246 /*
2247 * If non-blocking mode is set, or the port is not enabled,
2248 * then make the check up front and then exit.
2249 */
2250 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2251 info->flags |= ASYNC_NORMAL_ACTIVE;
2252 return (0);
2253 }
2254
2255 if (tty->termios->c_cflag & CLOCAL)
2256 do_clocal = 1;
2257
2258 /*
2259 * Block waiting for the carrier detect and the line to become
2260 * free (i.e., not in use by the callout). While we are in
2261 * this loop, info->count is dropped by one, so that
2262 * mxser_close() knows when to free things. We restore it upon
2263 * exit, either normal or abnormal.
2264 */
2265 retval = 0;
2266 add_wait_queue(&info->open_wait, &wait);
2267
2268 spin_lock_irqsave(&info->slock, flags);
2269 if (!tty_hung_up_p(filp))
2270 info->count--;
2271 spin_unlock_irqrestore(&info->slock, flags);
2272 info->blocked_open++;
2273 while (1) {
2274 spin_lock_irqsave(&info->slock, flags);
2275 outb(inb(info->base + UART_MCR) | UART_MCR_DTR | UART_MCR_RTS, info->base + UART_MCR);
2276 spin_unlock_irqrestore(&info->slock, flags);
2277 set_current_state(TASK_INTERRUPTIBLE);
2278 if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)) {
2279 if (info->flags & ASYNC_HUP_NOTIFY)
2280 retval = -EAGAIN;
2281 else
2282 retval = -ERESTARTSYS;
2283 break;
2284 }
2285 if (!(info->flags & ASYNC_CLOSING) && (do_clocal || (inb(info->base + UART_MSR) & UART_MSR_DCD)))
2286 break;
2287 if (signal_pending(current)) {
2288 retval = -ERESTARTSYS;
2289 break;
2290 }
2291 schedule();
2292 }
2293 set_current_state(TASK_RUNNING);
2294 remove_wait_queue(&info->open_wait, &wait);
2295 if (!tty_hung_up_p(filp))
2296 info->count++;
2297 info->blocked_open--;
2298 if (retval)
2299 return (retval);
2300 info->flags |= ASYNC_NORMAL_ACTIVE;
2301 return (0);
2302 }
2303
2304 static int mxser_startup(struct mxser_struct *info)
2305 {
2306
2307 unsigned long page;
2308 unsigned long flags;
2309
2310 page = __get_free_page(GFP_KERNEL);
2311 if (!page)
2312 return (-ENOMEM);
2313
2314 spin_lock_irqsave(&info->slock, flags);
2315
2316 if (info->flags & ASYNC_INITIALIZED) {
2317 free_page(page);
2318 spin_unlock_irqrestore(&info->slock, flags);
2319 return (0);
2320 }
2321
2322 if (!info->base || !info->type) {
2323 if (info->tty)
2324 set_bit(TTY_IO_ERROR, &info->tty->flags);
2325 free_page(page);
2326 spin_unlock_irqrestore(&info->slock, flags);
2327 return (0);
2328 }
2329 if (info->xmit_buf)
2330 free_page(page);
2331 else
2332 info->xmit_buf = (unsigned char *) page;
2333
2334 /*
2335 * Clear the FIFO buffers and disable them
2336 * (they will be reenabled in mxser_change_speed())
2337 */
2338 if (info->IsMoxaMustChipFlag)
2339 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2340 else
2341 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
2342
2343 /*
2344 * At this point there's no way the LSR could still be 0xFF;
2345 * if it is, then bail out, because there's likely no UART
2346 * here.
2347 */
2348 if (inb(info->base + UART_LSR) == 0xff) {
2349 spin_unlock_irqrestore(&info->slock, flags);
2350 if (capable(CAP_SYS_ADMIN)) {
2351 if (info->tty)
2352 set_bit(TTY_IO_ERROR, &info->tty->flags);
2353 return (0);
2354 } else
2355 return (-ENODEV);
2356 }
2357
2358 /*
2359 * Clear the interrupt registers.
2360 */
2361 (void) inb(info->base + UART_LSR);
2362 (void) inb(info->base + UART_RX);
2363 (void) inb(info->base + UART_IIR);
2364 (void) inb(info->base + UART_MSR);
2365
2366 /*
2367 * Now, initialize the UART
2368 */
2369 outb(UART_LCR_WLEN8, info->base + UART_LCR); /* reset DLAB */
2370 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
2371 outb(info->MCR, info->base + UART_MCR);
2372
2373 /*
2374 * Finally, enable interrupts
2375 */
2376 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
2377 // info->IER = UART_IER_RLSI | UART_IER_RDI;
2378
2379 // following add by Victor Yu. 08-30-2002
2380 if (info->IsMoxaMustChipFlag)
2381 info->IER |= MOXA_MUST_IER_EGDAI;
2382 // above add by Victor Yu. 08-30-2002
2383 outb(info->IER, info->base + UART_IER); /* enable interrupts */
2384
2385 /*
2386 * And clear the interrupt registers again for luck.
2387 */
2388 (void) inb(info->base + UART_LSR);
2389 (void) inb(info->base + UART_RX);
2390 (void) inb(info->base + UART_IIR);
2391 (void) inb(info->base + UART_MSR);
2392
2393 if (info->tty)
2394 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2395 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2396
2397 /*
2398 * and set the speed of the serial port
2399 */
2400 spin_unlock_irqrestore(&info->slock, flags);
2401 mxser_change_speed(info, NULL);
2402
2403 info->flags |= ASYNC_INITIALIZED;
2404 return (0);
2405 }
2406
2407 /*
2408 * This routine will shutdown a serial port; interrupts maybe disabled, and
2409 * DTR is dropped if the hangup on close termio flag is on.
2410 */
2411 static void mxser_shutdown(struct mxser_struct *info)
2412 {
2413 unsigned long flags;
2414
2415 if (!(info->flags & ASYNC_INITIALIZED))
2416 return;
2417
2418 spin_lock_irqsave(&info->slock, flags);
2419
2420 /*
2421 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
2422 * here so the queue might never be waken up
2423 */
2424 wake_up_interruptible(&info->delta_msr_wait);
2425
2426 /*
2427 * Free the IRQ, if necessary
2428 */
2429 if (info->xmit_buf) {
2430 free_page((unsigned long) info->xmit_buf);
2431 info->xmit_buf = NULL;
2432 }
2433
2434 info->IER = 0;
2435 outb(0x00, info->base + UART_IER);
2436
2437 if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
2438 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
2439 outb(info->MCR, info->base + UART_MCR);
2440
2441 /* clear Rx/Tx FIFO's */
2442 // following add by Victor Yu. 08-30-2002
2443 if (info->IsMoxaMustChipFlag)
2444 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2445 else
2446 // above add by Victor Yu. 08-30-2002
2447 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
2448
2449 /* read data port to reset things */
2450 (void) inb(info->base + UART_RX);
2451
2452 if (info->tty)
2453 set_bit(TTY_IO_ERROR, &info->tty->flags);
2454
2455 info->flags &= ~ASYNC_INITIALIZED;
2456
2457 // following add by Victor Yu. 09-23-2002
2458 if (info->IsMoxaMustChipFlag) {
2459 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->base);
2460 }
2461 // above add by Victor Yu. 09-23-2002
2462
2463 spin_unlock_irqrestore(&info->slock, flags);
2464 }
2465
2466 /*
2467 * This routine is called to set the UART divisor registers to match
2468 * the specified baud rate for a serial port.
2469 */
2470 static int mxser_change_speed(struct mxser_struct *info, struct termios *old_termios)
2471 {
2472 unsigned cflag, cval, fcr;
2473 int ret = 0;
2474 unsigned char status;
2475 long baud;
2476 unsigned long flags;
2477
2478
2479 if (!info->tty || !info->tty->termios)
2480 return ret;
2481 cflag = info->tty->termios->c_cflag;
2482 if (!(info->base))
2483 return ret;
2484
2485
2486 #ifndef B921600
2487 #define B921600 (B460800 +1)
2488 #endif
2489 if (mxser_set_baud_method[info->port] == 0) {
2490 switch (cflag & (CBAUD | CBAUDEX)) {
2491 case B921600:
2492 baud = 921600;
2493 break;
2494 case B460800:
2495 baud = 460800;
2496 break;
2497 case B230400:
2498 baud = 230400;
2499 break;
2500 case B115200:
2501 baud = 115200;
2502 break;
2503 case B57600:
2504 baud = 57600;
2505 break;
2506 case B38400:
2507 baud = 38400;
2508 break;
2509 case B19200:
2510 baud = 19200;
2511 break;
2512 case B9600:
2513 baud = 9600;
2514 break;
2515 case B4800:
2516 baud = 4800;
2517 break;
2518 case B2400:
2519 baud = 2400;
2520 break;
2521 case B1800:
2522 baud = 1800;
2523 break;
2524 case B1200:
2525 baud = 1200;
2526 break;
2527 case B600:
2528 baud = 600;
2529 break;
2530 case B300:
2531 baud = 300;
2532 break;
2533 case B200:
2534 baud = 200;
2535 break;
2536 case B150:
2537 baud = 150;
2538 break;
2539 case B134:
2540 baud = 134;
2541 break;
2542 case B110:
2543 baud = 110;
2544 break;
2545 case B75:
2546 baud = 75;
2547 break;
2548 case B50:
2549 baud = 50;
2550 break;
2551 default:
2552 baud = 0;
2553 break;
2554 }
2555 mxser_set_baud(info, baud);
2556 }
2557
2558 /* byte size and parity */
2559 switch (cflag & CSIZE) {
2560 case CS5:
2561 cval = 0x00;
2562 break;
2563 case CS6:
2564 cval = 0x01;
2565 break;
2566 case CS7:
2567 cval = 0x02;
2568 break;
2569 case CS8:
2570 cval = 0x03;
2571 break;
2572 default:
2573 cval = 0x00;
2574 break; /* too keep GCC shut... */
2575 }
2576 if (cflag & CSTOPB)
2577 cval |= 0x04;
2578 if (cflag & PARENB)
2579 cval |= UART_LCR_PARITY;
2580 if (!(cflag & PARODD)) {
2581 cval |= UART_LCR_EPAR;
2582 }
2583 if (cflag & CMSPAR)
2584 cval |= UART_LCR_SPAR;
2585
2586 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
2587 if (info->IsMoxaMustChipFlag) {
2588 fcr = UART_FCR_ENABLE_FIFO;
2589 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2590 SET_MOXA_MUST_FIFO_VALUE(info);
2591 } else
2592 fcr = 0;
2593 } else {
2594 fcr = UART_FCR_ENABLE_FIFO;
2595 // following add by Victor Yu. 08-30-2002
2596 if (info->IsMoxaMustChipFlag) {
2597 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2598 SET_MOXA_MUST_FIFO_VALUE(info);
2599 } else {
2600 // above add by Victor Yu. 08-30-2002
2601
2602 switch (info->rx_trigger) {
2603 case 1:
2604 fcr |= UART_FCR_TRIGGER_1;
2605 break;
2606 case 4:
2607 fcr |= UART_FCR_TRIGGER_4;
2608 break;
2609 case 8:
2610 fcr |= UART_FCR_TRIGGER_8;
2611 break;
2612 default:
2613 fcr |= UART_FCR_TRIGGER_14;
2614 break;
2615 }
2616 }
2617 }
2618
2619 /* CTS flow control flag and modem status interrupts */
2620 info->IER &= ~UART_IER_MSI;
2621 info->MCR &= ~UART_MCR_AFE;
2622 if (cflag & CRTSCTS) {
2623 info->flags |= ASYNC_CTS_FLOW;
2624 info->IER |= UART_IER_MSI;
2625 if ((info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
2626 info->MCR |= UART_MCR_AFE;
2627 //status = mxser_get_msr(info->base, 0, info->port);
2628 /* save_flags(flags);
2629 cli();
2630 status = inb(baseaddr + UART_MSR);
2631 restore_flags(flags);*/
2632 //mxser_check_modem_status(info, status);
2633 } else {
2634 //status = mxser_get_msr(info->base, 0, info->port);
2635
2636 //MX_LOCK(&info->slock);
2637 status = inb(info->base + UART_MSR);
2638 //MX_UNLOCK(&info->slock);
2639 if (info->tty->hw_stopped) {
2640 if (status & UART_MSR_CTS) {
2641 info->tty->hw_stopped = 0;
2642 if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2643 info->IER |= UART_IER_THRI;
2644 outb(info->IER, info->base + UART_IER);
2645 }
2646 set_bit(MXSER_EVENT_TXLOW, &info->event);
2647 schedule_work(&info->tqueue); }
2648 } else {
2649 if (!(status & UART_MSR_CTS)) {
2650 info->tty->hw_stopped = 1;
2651 if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2652 info->IER &= ~UART_IER_THRI;
2653 outb(info->IER, info->base + UART_IER);
2654 }
2655 }
2656 }
2657 }
2658 } else {
2659 info->flags &= ~ASYNC_CTS_FLOW;
2660 }
2661 outb(info->MCR, info->base + UART_MCR);
2662 if (cflag & CLOCAL) {
2663 info->flags &= ~ASYNC_CHECK_CD;
2664 } else {
2665 info->flags |= ASYNC_CHECK_CD;
2666 info->IER |= UART_IER_MSI;
2667 }
2668 outb(info->IER, info->base + UART_IER);
2669
2670 /*
2671 * Set up parity check flag
2672 */
2673 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
2674 if (I_INPCK(info->tty))
2675 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
2676 if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
2677 info->read_status_mask |= UART_LSR_BI;
2678
2679 info->ignore_status_mask = 0;
2680
2681 if (I_IGNBRK(info->tty)) {
2682 info->ignore_status_mask |= UART_LSR_BI;
2683 info->read_status_mask |= UART_LSR_BI;
2684 /*
2685 * If we're ignore parity and break indicators, ignore
2686 * overruns too. (For real raw support).
2687 */
2688 if (I_IGNPAR(info->tty)) {
2689 info->ignore_status_mask |= UART_LSR_OE | UART_LSR_PE | UART_LSR_FE;
2690 info->read_status_mask |= UART_LSR_OE | UART_LSR_PE | UART_LSR_FE;
2691 }
2692 }
2693 // following add by Victor Yu. 09-02-2002
2694 if (info->IsMoxaMustChipFlag) {
2695 spin_lock_irqsave(&info->slock, flags);
2696 SET_MOXA_MUST_XON1_VALUE(info->base, START_CHAR(info->tty));
2697 SET_MOXA_MUST_XOFF1_VALUE(info->base, STOP_CHAR(info->tty));
2698 if (I_IXON(info->tty)) {
2699 ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2700 } else {
2701 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2702 }
2703 if (I_IXOFF(info->tty)) {
2704 ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2705 } else {
2706 DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2707 }
2708 /*
2709 if ( I_IXANY(info->tty) ) {
2710 info->MCR |= MOXA_MUST_MCR_XON_ANY;
2711 ENABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2712 } else {
2713 info->MCR &= ~MOXA_MUST_MCR_XON_ANY;
2714 DISABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2715 }
2716 */
2717 spin_unlock_irqrestore(&info->slock, flags);
2718 }
2719 // above add by Victor Yu. 09-02-2002
2720
2721
2722 outb(fcr, info->base + UART_FCR); /* set fcr */
2723 outb(cval, info->base + UART_LCR);
2724
2725 return ret;
2726 }
2727
2728
2729 static int mxser_set_baud(struct mxser_struct *info, long newspd)
2730 {
2731 int quot = 0;
2732 unsigned char cval;
2733 int ret = 0;
2734 unsigned long flags;
2735
2736 if (!info->tty || !info->tty->termios)
2737 return ret;
2738
2739 if (!(info->base))
2740 return ret;
2741
2742 if (newspd > info->MaxCanSetBaudRate)
2743 return 0;
2744
2745 info->realbaud = newspd;
2746 if (newspd == 134) {
2747 quot = (2 * info->baud_base / 269);
2748 } else if (newspd) {
2749 quot = info->baud_base / newspd;
2750
2751 if (quot == 0)
2752 quot = 1;
2753
2754 } else {
2755 quot = 0;
2756 }
2757
2758 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
2759 info->timeout += HZ / 50; /* Add .02 seconds of slop */
2760
2761 if (quot) {
2762 spin_lock_irqsave(&info->slock, flags);
2763 info->MCR |= UART_MCR_DTR;
2764 outb(info->MCR, info->base + UART_MCR);
2765 spin_unlock_irqrestore(&info->slock, flags);
2766 } else {
2767 spin_lock_irqsave(&info->slock, flags);
2768 info->MCR &= ~UART_MCR_DTR;
2769 outb(info->MCR, info->base + UART_MCR);
2770 spin_unlock_irqrestore(&info->slock, flags);
2771 return ret;
2772 }
2773
2774 cval = inb(info->base + UART_LCR);
2775
2776 outb(cval | UART_LCR_DLAB, info->base + UART_LCR); /* set DLAB */
2777
2778 outb(quot & 0xff, info->base + UART_DLL); /* LS of divisor */
2779 outb(quot >> 8, info->base + UART_DLM); /* MS of divisor */
2780 outb(cval, info->base + UART_LCR); /* reset DLAB */
2781
2782
2783 return ret;
2784 }
2785
2786
2787
2788 /*
2789 * ------------------------------------------------------------
2790 * friends of mxser_ioctl()
2791 * ------------------------------------------------------------
2792 */
2793 static int mxser_get_serial_info(struct mxser_struct *info, struct serial_struct __user *retinfo)
2794 {
2795 struct serial_struct tmp;
2796
2797 if (!retinfo)
2798 return (-EFAULT);
2799 memset(&tmp, 0, sizeof(tmp));
2800 tmp.type = info->type;
2801 tmp.line = info->port;
2802 tmp.port = info->base;
2803 tmp.irq = info->irq;
2804 tmp.flags = info->flags;
2805 tmp.baud_base = info->baud_base;
2806 tmp.close_delay = info->close_delay;
2807 tmp.closing_wait = info->closing_wait;
2808 tmp.custom_divisor = info->custom_divisor;
2809 tmp.hub6 = 0;
2810 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2811 return -EFAULT;
2812 return (0);
2813 }
2814
2815 static int mxser_set_serial_info(struct mxser_struct *info, struct serial_struct __user *new_info)
2816 {
2817 struct serial_struct new_serial;
2818 unsigned int flags;
2819 int retval = 0;
2820
2821 if (!new_info || !info->base)
2822 return (-EFAULT);
2823 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2824 return -EFAULT;
2825
2826 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))
2827 return (-EPERM);
2828
2829 flags = info->flags & ASYNC_SPD_MASK;
2830
2831 if (!capable(CAP_SYS_ADMIN)) {
2832 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)))
2833 return (-EPERM);
2834 info->flags = ((info->flags & ~ASYNC_USR_MASK) | (new_serial.flags & ASYNC_USR_MASK));
2835 } else {
2836 /*
2837 * OK, past this point, all the error checking has been done.
2838 * At this point, we start making changes.....
2839 */
2840 info->flags = ((info->flags & ~ASYNC_FLAGS) | (new_serial.flags & ASYNC_FLAGS));
2841 info->close_delay = new_serial.close_delay * HZ / 100;
2842 info->closing_wait = new_serial.closing_wait * HZ / 100;
2843 info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2844 info->tty->low_latency = 0; //(info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2845 }
2846
2847 /* added by casper, 3/17/2000, for mouse */
2848 info->type = new_serial.type;
2849
2850 process_txrx_fifo(info);
2851
2852 /* */
2853 if (info->flags & ASYNC_INITIALIZED) {
2854 if (flags != (info->flags & ASYNC_SPD_MASK)) {
2855 mxser_change_speed(info, NULL);
2856 }
2857 } else {
2858 retval = mxser_startup(info);
2859 }
2860 return (retval);
2861 }
2862
2863 /*
2864 * mxser_get_lsr_info - get line status register info
2865 *
2866 * Purpose: Let user call ioctl() to get info when the UART physically
2867 * is emptied. On bus types like RS485, the transmitter must
2868 * release the bus after transmitting. This must be done when
2869 * the transmit shift register is empty, not be done when the
2870 * transmit holding register is empty. This functionality
2871 * allows an RS485 driver to be written in user space.
2872 */
2873 static int mxser_get_lsr_info(struct mxser_struct *info, unsigned int __user *value)
2874 {
2875 unsigned char status;
2876 unsigned int result;
2877 unsigned long flags;
2878
2879 spin_lock_irqsave(&info->slock, flags);
2880 status = inb(info->base + UART_LSR);
2881 spin_unlock_irqrestore(&info->slock, flags);
2882 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
2883 return put_user(result, value);
2884 }
2885
2886 /*
2887 * This routine sends a break character out the serial port.
2888 */
2889 static void mxser_send_break(struct mxser_struct *info, int duration)
2890 {
2891 unsigned long flags;
2892
2893 if (!info->base)
2894 return;
2895 set_current_state(TASK_INTERRUPTIBLE);
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 schedule_timeout(duration);
2900 spin_lock_irqsave(&info->slock, flags);
2901 outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC, info->base + UART_LCR);
2902 spin_unlock_irqrestore(&info->slock, flags);
2903 }
2904
2905 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
2906 {
2907 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
2908 unsigned char control, status;
2909 unsigned long flags;
2910
2911
2912 if (tty->index == MXSER_PORTS)
2913 return (-ENOIOCTLCMD);
2914 if (tty->flags & (1 << TTY_IO_ERROR))
2915 return (-EIO);
2916
2917 control = info->MCR;
2918
2919 spin_lock_irqsave(&info->slock, flags);
2920 status = inb(info->base + UART_MSR);
2921 if (status & UART_MSR_ANY_DELTA)
2922 mxser_check_modem_status(info, status);
2923 spin_unlock_irqrestore(&info->slock, flags);
2924 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
2925 ((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);
2926 }
2927
2928 static int mxser_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear)
2929 {
2930 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
2931 unsigned long flags;
2932
2933
2934 if (tty->index == MXSER_PORTS)
2935 return -ENOIOCTLCMD;
2936 if (tty->flags & (1 << TTY_IO_ERROR))
2937 return -EIO;
2938
2939 spin_lock_irqsave(&info->slock, flags);
2940
2941 if (set & TIOCM_RTS)
2942 info->MCR |= UART_MCR_RTS;
2943 if (set & TIOCM_DTR)
2944 info->MCR |= UART_MCR_DTR;
2945
2946 if (clear & TIOCM_RTS)
2947 info->MCR &= ~UART_MCR_RTS;
2948 if (clear & TIOCM_DTR)
2949 info->MCR &= ~UART_MCR_DTR;
2950
2951 outb(info->MCR, info->base + UART_MCR);
2952 spin_unlock_irqrestore(&info->slock, flags);
2953 return 0;
2954 }
2955
2956
2957 static int mxser_read_register(int, unsigned short *);
2958 static int mxser_program_mode(int);
2959 static void mxser_normal_mode(int);
2960
2961 static int mxser_get_ISA_conf(int cap, struct mxser_hwconf *hwconf)
2962 {
2963 int id, i, bits;
2964 unsigned short regs[16], irq;
2965 unsigned char scratch, scratch2;
2966
2967 hwconf->IsMoxaMustChipFlag = MOXA_OTHER_UART;
2968
2969 id = mxser_read_register(cap, regs);
2970 if (id == C168_ASIC_ID) {
2971 hwconf->board_type = MXSER_BOARD_C168_ISA;
2972 hwconf->ports = 8;
2973 } else if (id == C104_ASIC_ID) {
2974 hwconf->board_type = MXSER_BOARD_C104_ISA;
2975 hwconf->ports = 4;
2976 } else if (id == C102_ASIC_ID) {
2977 hwconf->board_type = MXSER_BOARD_C102_ISA;
2978 hwconf->ports = 2;
2979 } else if (id == CI132_ASIC_ID) {
2980 hwconf->board_type = MXSER_BOARD_CI132;
2981 hwconf->ports = 2;
2982 } else if (id == CI134_ASIC_ID) {
2983 hwconf->board_type = MXSER_BOARD_CI134;
2984 hwconf->ports = 4;
2985 } else if (id == CI104J_ASIC_ID) {
2986 hwconf->board_type = MXSER_BOARD_CI104J;
2987 hwconf->ports = 4;
2988 } else
2989 return (0);
2990
2991 irq = 0;
2992 if (hwconf->ports == 2) {
2993 irq = regs[9] & 0xF000;
2994 irq = irq | (irq >> 4);
2995 if (irq != (regs[9] & 0xFF00))
2996 return (MXSER_ERR_IRQ_CONFLIT);
2997 } else if (hwconf->ports == 4) {
2998 irq = regs[9] & 0xF000;
2999 irq = irq | (irq >> 4);
3000 irq = irq | (irq >> 8);
3001 if (irq != regs[9])
3002 return (MXSER_ERR_IRQ_CONFLIT);
3003 } else if (hwconf->ports == 8) {
3004 irq = regs[9] & 0xF000;
3005 irq = irq | (irq >> 4);
3006 irq = irq | (irq >> 8);
3007 if ((irq != regs[9]) || (irq != regs[10]))
3008 return (MXSER_ERR_IRQ_CONFLIT);
3009 }
3010
3011 if (!irq) {
3012 return (MXSER_ERR_IRQ);
3013 }
3014 hwconf->irq = ((int) (irq & 0xF000) >> 12);
3015 for (i = 0; i < 8; i++)
3016 hwconf->ioaddr[i] = (int) regs[i + 1] & 0xFFF8;
3017 if ((regs[12] & 0x80) == 0) {
3018 return (MXSER_ERR_VECTOR);
3019 }
3020 hwconf->vector = (int) regs[11]; /* interrupt vector */
3021 if (id == 1)
3022 hwconf->vector_mask = 0x00FF;
3023 else
3024 hwconf->vector_mask = 0x000F;
3025 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
3026 if (regs[12] & bits) {
3027 hwconf->baud_base[i] = 921600;
3028 hwconf->MaxCanSetBaudRate[i] = 921600; // add by Victor Yu. 09-04-2002
3029 } else {
3030 hwconf->baud_base[i] = 115200;
3031 hwconf->MaxCanSetBaudRate[i] = 115200; // add by Victor Yu. 09-04-2002
3032 }
3033 }
3034 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
3035 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
3036 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
3037 outb(scratch2, cap + UART_LCR);
3038 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
3039 scratch = inb(cap + UART_IIR);
3040
3041 if (scratch & 0xC0)
3042 hwconf->uart_type = PORT_16550A;
3043 else
3044 hwconf->uart_type = PORT_16450;
3045 if (id == 1)
3046 hwconf->ports = 8;
3047 else
3048 hwconf->ports = 4;
3049 request_region(hwconf->ioaddr[0], 8 * hwconf->ports, "mxser(IO)");
3050 request_region(hwconf->vector, 1, "mxser(vector)");
3051 return (hwconf->ports);
3052 }
3053
3054 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
3055 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
3056 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
3057 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
3058 #define EN_CCMD 0x000 /* Chip's command register */
3059 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
3060 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
3061 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
3062 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
3063 #define EN0_DCFG 0x00E /* Data configuration reg WR */
3064 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
3065 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
3066 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
3067 static int mxser_read_register(int port, unsigned short *regs)
3068 {
3069 int i, k, value, id;
3070 unsigned int j;
3071
3072 id = mxser_program_mode(port);
3073 if (id < 0)
3074 return (id);
3075 for (i = 0; i < 14; i++) {
3076 k = (i & 0x3F) | 0x180;
3077 for (j = 0x100; j > 0; j >>= 1) {
3078 outb(CHIP_CS, port);
3079 if (k & j) {
3080 outb(CHIP_CS | CHIP_DO, port);
3081 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
3082 } else {
3083 outb(CHIP_CS, port);
3084 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
3085 }
3086 }
3087 (void) inb(port);
3088 value = 0;
3089 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
3090 outb(CHIP_CS, port);
3091 outb(CHIP_CS | CHIP_SK, port);
3092 if (inb(port) & CHIP_DI)
3093 value |= j;
3094 }
3095 regs[i] = value;
3096 outb(0, port);
3097 }
3098 mxser_normal_mode(port);
3099 return (id);
3100 }
3101
3102 static int mxser_program_mode(int port)
3103 {
3104 int id, i, j, n;
3105 //unsigned long flags;
3106
3107 spin_lock(&gm_lock);
3108 outb(0, port);
3109 outb(0, port);
3110 outb(0, port);
3111 (void) inb(port);
3112 (void) inb(port);
3113 outb(0, port);
3114 (void) inb(port);
3115 //restore_flags(flags);
3116 spin_unlock(&gm_lock);
3117
3118 id = inb(port + 1) & 0x1F;
3119 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))
3120 return (-1);
3121 for (i = 0, j = 0; i < 4; i++) {
3122 n = inb(port + 2);
3123 if (n == 'M') {
3124 j = 1;
3125 } else if ((j == 1) && (n == 1)) {
3126 j = 2;
3127 break;
3128 } else
3129 j = 0;
3130 }
3131 if (j != 2)
3132 id = -2;
3133 return (id);
3134 }
3135
3136 static void mxser_normal_mode(int port)
3137 {
3138 int i, n;
3139
3140 outb(0xA5, port + 1);
3141 outb(0x80, port + 3);
3142 outb(12, port + 0); /* 9600 bps */
3143 outb(0, port + 1);
3144 outb(0x03, port + 3); /* 8 data bits */
3145 outb(0x13, port + 4); /* loop back mode */
3146 for (i = 0; i < 16; i++) {
3147 n = inb(port + 5);
3148 if ((n & 0x61) == 0x60)
3149 break;
3150 if ((n & 1) == 1)
3151 (void) inb(port);
3152 }
3153 outb(0x00, port + 4);
3154 }
3155
3156 module_init(mxser_module_init);
3157 module_exit(mxser_module_exit);
kernel source for telekom puls (alcatel/mediatek)