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/segment.h>
67 #include <asm/bitops.h>
68 #include <asm/uaccess.h>
69
70 #include "mxser.h"
71
72 #define MXSER_VERSION "1.8"
73 #define MXSERMAJOR 174
74 #define MXSERCUMAJOR 175
75
76 #define MXSER_EVENT_TXLOW 1
77 #define MXSER_EVENT_HANGUP 2
78
79 #define MXSER_BOARDS 4 /* Max. boards */
80 #define MXSER_PORTS 32 /* Max. ports */
81 #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
82 #define MXSER_ISR_PASS_LIMIT 256
83
84 #define MXSER_ERR_IOADDR -1
85 #define MXSER_ERR_IRQ -2
86 #define MXSER_ERR_IRQ_CONFLIT -3
87 #define MXSER_ERR_VECTOR -4
88
89 #define SERIAL_TYPE_NORMAL 1
90 #define SERIAL_TYPE_CALLOUT 2
91
92 #define WAKEUP_CHARS 256
93
94 #define UART_MCR_AFE 0x20
95 #define UART_LSR_SPECIAL 0x1E
96
97 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|IXON|IXOFF))
98
99 #define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? SA_SHIRQ : SA_INTERRUPT)
100
101 #define C168_ASIC_ID 1
102 #define C104_ASIC_ID 2
103 #define C102_ASIC_ID 0xB
104 #define CI132_ASIC_ID 4
105 #define CI134_ASIC_ID 3
106 #define CI104J_ASIC_ID 5
107
108 enum {
109 MXSER_BOARD_C168_ISA = 1,
110 MXSER_BOARD_C104_ISA,
111 MXSER_BOARD_CI104J,
112 MXSER_BOARD_C168_PCI,
113 MXSER_BOARD_C104_PCI,
114 MXSER_BOARD_C102_ISA,
115 MXSER_BOARD_CI132,
116 MXSER_BOARD_CI134,
117 MXSER_BOARD_CP132,
118 MXSER_BOARD_CP114,
119 MXSER_BOARD_CT114,
120 MXSER_BOARD_CP102,
121 MXSER_BOARD_CP104U,
122 MXSER_BOARD_CP168U,
123 MXSER_BOARD_CP132U,
124 MXSER_BOARD_CP134U,
125 MXSER_BOARD_CP104JU,
126 MXSER_BOARD_RC7000,
127 MXSER_BOARD_CP118U,
128 MXSER_BOARD_CP102UL,
129 MXSER_BOARD_CP102U,
130 };
131
132 static char *mxser_brdname[] = {
133 "C168 series",
134 "C104 series",
135 "CI-104J series",
136 "C168H/PCI series",
137 "C104H/PCI series",
138 "C102 series",
139 "CI-132 series",
140 "CI-134 series",
141 "CP-132 series",
142 "CP-114 series",
143 "CT-114 series",
144 "CP-102 series",
145 "CP-104U series",
146 "CP-168U series",
147 "CP-132U series",
148 "CP-134U series",
149 "CP-104JU series",
150 "Moxa UC7000 Serial",
151 "CP-118U series",
152 "CP-102UL series",
153 "CP-102U series",
154 };
155
156 static int mxser_numports[] = {
157 8, // C168-ISA
158 4, // C104-ISA
159 4, // CI104J
160 8, // C168-PCI
161 4, // C104-PCI
162 2, // C102-ISA
163 2, // CI132
164 4, // CI134
165 2, // CP132
166 4, // CP114
167 4, // CT114
168 2, // CP102
169 4, // CP104U
170 8, // CP168U
171 2, // CP132U
172 4, // CP134U
173 4, // CP104JU
174 8, // RC7000
175 8, // CP118U
176 2, // CP102UL
177 2, // CP102U
178 };
179
180 #define UART_TYPE_NUM 2
181
182 unsigned int Gmoxa_uart_id[UART_TYPE_NUM] = {
183 MOXA_MUST_MU150_HWID,
184 MOXA_MUST_MU860_HWID
185 };
186
187 // This is only for PCI
188 #define UART_INFO_NUM 3
189 struct mxpciuart_info {
190 int type;
191 int tx_fifo;
192 int rx_fifo;
193 int xmit_fifo_size;
194 int rx_high_water;
195 int rx_trigger;
196 int rx_low_water;
197 long max_baud;
198 };
199
200 struct mxpciuart_info Gpci_uart_info[UART_INFO_NUM] = {
201 {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
202 {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
203 {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
204 };
205
206
207 #ifdef CONFIG_PCI
208
209 static struct pci_device_id mxser_pcibrds[] = {
210 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C168_PCI},
211 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C104_PCI},
212 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132},
213 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP114},
214 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CT114},
215 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102},
216 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104U},
217 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP168U},
218 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132U},
219 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP134U},
220 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104JU},
221 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_RC7000},
222 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP118U},
223 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102UL},
224 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102U},
225 {0}
226 };
227
228 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
229
230
231 #endif
232
233 typedef struct _moxa_pci_info {
234 unsigned short busNum;
235 unsigned short devNum;
236 struct pci_dev *pdev; // add by Victor Yu. 06-23-2003
237 } moxa_pci_info;
238
239 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
240 static int ttymajor = MXSERMAJOR;
241 static int calloutmajor = MXSERCUMAJOR;
242 static int verbose = 0;
243
244 /* Variables for insmod */
245
246 MODULE_AUTHOR("Casper Yang");
247 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
248 MODULE_PARM(ioaddr, "1-4i");
249 MODULE_PARM(ttymajor, "i");
250 MODULE_PARM(calloutmajor, "i");
251 MODULE_PARM(verbose, "i");
252 MODULE_LICENSE("GPL");
253
254 struct mxser_log {
255 int tick;
256 unsigned long rxcnt[MXSER_PORTS];
257 unsigned long txcnt[MXSER_PORTS];
258 };
259
260
261 struct mxser_mon {
262 unsigned long rxcnt;
263 unsigned long txcnt;
264 unsigned long up_rxcnt;
265 unsigned long up_txcnt;
266 int modem_status;
267 unsigned char hold_reason;
268 };
269
270 struct mxser_mon_ext {
271 unsigned long rx_cnt[32];
272 unsigned long tx_cnt[32];
273 unsigned long up_rxcnt[32];
274 unsigned long up_txcnt[32];
275 int modem_status[32];
276
277 long baudrate[32];
278 int databits[32];
279 int stopbits[32];
280 int parity[32];
281 int flowctrl[32];
282 int fifo[32];
283 int iftype[32];
284 };
285 struct mxser_hwconf {
286 int board_type;
287 int ports;
288 int irq;
289 int vector;
290 int vector_mask;
291 int uart_type;
292 int ioaddr[MXSER_PORTS_PER_BOARD];
293 int baud_base[MXSER_PORTS_PER_BOARD];
294 moxa_pci_info pciInfo;
295 int IsMoxaMustChipFlag; // add by Victor Yu. 08-30-2002
296 int MaxCanSetBaudRate[MXSER_PORTS_PER_BOARD]; // add by Victor Yu. 09-04-2002
297 int opmode_ioaddr[MXSER_PORTS_PER_BOARD]; // add by Victor Yu. 01-05-2004
298 };
299
300 struct mxser_struct {
301 int port;
302 int base; /* port base address */
303 int irq; /* port using irq no. */
304 int vector; /* port irq vector */
305 int vectormask; /* port vector mask */
306 int rx_high_water;
307 int rx_trigger; /* Rx fifo trigger level */
308 int rx_low_water;
309 int baud_base; /* max. speed */
310 int flags; /* defined in tty.h */
311 int type; /* UART type */
312 struct tty_struct *tty;
313 int read_status_mask;
314 int ignore_status_mask;
315 int xmit_fifo_size;
316 int custom_divisor;
317 int x_char; /* xon/xoff character */
318 int close_delay;
319 unsigned short closing_wait;
320 int IER; /* Interrupt Enable Register */
321 int MCR; /* Modem control register */
322 unsigned long event;
323 int count; /* # of fd on device */
324 int blocked_open; /* # of blocked opens */
325 long session; /* Session of opening process */
326 long pgrp; /* pgrp of opening process */
327 unsigned char *xmit_buf;
328 int xmit_head;
329 int xmit_tail;
330 int xmit_cnt;
331 struct work_struct tqueue;
332 struct termios normal_termios;
333 struct termios callout_termios;
334 wait_queue_head_t open_wait;
335 wait_queue_head_t close_wait;
336 wait_queue_head_t delta_msr_wait;
337 struct async_icount icount; /* kernel counters for the 4 input interrupts */
338 int timeout;
339 int IsMoxaMustChipFlag; // add by Victor Yu. 08-30-2002
340 int MaxCanSetBaudRate; // add by Victor Yu. 09-04-2002
341 int opmode_ioaddr; // add by Victor Yu. 01-05-2004
342 unsigned char stop_rx;
343 unsigned char ldisc_stop_rx;
344 long realbaud;
345 struct mxser_mon mon_data;
346 unsigned char err_shadow;
347 spinlock_t slock;
348 };
349
350
351 struct mxser_mstatus {
352 tcflag_t cflag;
353 int cts;
354 int dsr;
355 int ri;
356 int dcd;
357 };
358
359 static struct mxser_mstatus GMStatus[MXSER_PORTS];
360
361 static int mxserBoardCAP[MXSER_BOARDS] = {
362 0, 0, 0, 0
363 /* 0x180, 0x280, 0x200, 0x320 */
364 };
365
366 static struct tty_driver *mxvar_sdriver;
367 static struct mxser_struct mxvar_table[MXSER_PORTS];
368 static struct tty_struct *mxvar_tty[MXSER_PORTS + 1];
369 static struct termios *mxvar_termios[MXSER_PORTS + 1];
370 static struct termios *mxvar_termios_locked[MXSER_PORTS + 1];
371 static struct mxser_log mxvar_log;
372 static int mxvar_diagflag;
373 static unsigned char mxser_msr[MXSER_PORTS + 1];
374 static struct mxser_mon_ext mon_data_ext;
375 static int mxser_set_baud_method[MXSER_PORTS + 1];
376 static spinlock_t gm_lock;
377
378 /*
379 * This is used to figure out the divisor speeds and the timeouts
380 */
381
382 static struct mxser_hwconf mxsercfg[MXSER_BOARDS];
383
384 /*
385 * static functions:
386 */
387
388 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf);
389 static int mxser_init(void);
390
391 //static void mxser_poll(unsigned long);
392 static int mxser_get_ISA_conf(int, struct mxser_hwconf *);
393 static int mxser_get_PCI_conf(int, int, int, struct mxser_hwconf *);
394 static void mxser_do_softint(void *);
395 static int mxser_open(struct tty_struct *, struct file *);
396 static void mxser_close(struct tty_struct *, struct file *);
397 static int mxser_write(struct tty_struct *, const unsigned char *, int);
398 static int mxser_write_room(struct tty_struct *);
399 static void mxser_flush_buffer(struct tty_struct *);
400 static int mxser_chars_in_buffer(struct tty_struct *);
401 static void mxser_flush_chars(struct tty_struct *);
402 static void mxser_put_char(struct tty_struct *, unsigned char);
403 static int mxser_ioctl(struct tty_struct *, struct file *, uint, ulong);
404 static int mxser_ioctl_special(unsigned int, void __user *);
405 static void mxser_throttle(struct tty_struct *);
406 static void mxser_unthrottle(struct tty_struct *);
407 static void mxser_set_termios(struct tty_struct *, struct termios *);
408 static void mxser_stop(struct tty_struct *);
409 static void mxser_start(struct tty_struct *);
410 static void mxser_hangup(struct tty_struct *);
411 static void mxser_rs_break(struct tty_struct *, int);
412 static irqreturn_t mxser_interrupt(int, void *, struct pt_regs *);
413 static void mxser_receive_chars(struct mxser_struct *, int *);
414 static void mxser_transmit_chars(struct mxser_struct *);
415 static void mxser_check_modem_status(struct mxser_struct *, int);
416 static int mxser_block_til_ready(struct tty_struct *, struct file *, struct mxser_struct *);
417 static int mxser_startup(struct mxser_struct *);
418 static void mxser_shutdown(struct mxser_struct *);
419 static int mxser_change_speed(struct mxser_struct *, struct termios *old_termios);
420 static int mxser_get_serial_info(struct mxser_struct *, struct serial_struct __user *);
421 static int mxser_set_serial_info(struct mxser_struct *, struct serial_struct __user *);
422 static int mxser_get_lsr_info(struct mxser_struct *, unsigned int __user *);
423 static void mxser_send_break(struct mxser_struct *, int);
424 static int mxser_tiocmget(struct tty_struct *, struct file *);
425 static int mxser_tiocmset(struct tty_struct *, struct file *, unsigned int, unsigned int);
426 static int mxser_set_baud(struct mxser_struct *info, long newspd);
427 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout);
428
429 static void mxser_startrx(struct tty_struct *tty);
430 static void mxser_stoprx(struct tty_struct *tty);
431
432
433 static int CheckIsMoxaMust(int io)
434 {
435 u8 oldmcr, hwid;
436 int i;
437
438 outb(0, io + UART_LCR);
439 DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
440 oldmcr = inb(io + UART_MCR);
441 outb(0, io + UART_MCR);
442 SET_MOXA_MUST_XON1_VALUE(io, 0x11);
443 if ((hwid = inb(io + UART_MCR)) != 0) {
444 outb(oldmcr, io + UART_MCR);
445 return (MOXA_OTHER_UART);
446 }
447
448 GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
449 for (i = 0; i < UART_TYPE_NUM; i++) {
450 if (hwid == Gmoxa_uart_id[i])
451 return (int) hwid;
452 }
453 return MOXA_OTHER_UART;
454 }
455
456 // above is modified by Victor Yu. 08-15-2002
457
458 static struct tty_operations mxser_ops = {
459 .open = mxser_open,
460 .close = mxser_close,
461 .write = mxser_write,
462 .put_char = mxser_put_char,
463 .flush_chars = mxser_flush_chars,
464 .write_room = mxser_write_room,
465 .chars_in_buffer = mxser_chars_in_buffer,
466 .flush_buffer = mxser_flush_buffer,
467 .ioctl = mxser_ioctl,
468 .throttle = mxser_throttle,
469 .unthrottle = mxser_unthrottle,
470 .set_termios = mxser_set_termios,
471 .stop = mxser_stop,
472 .start = mxser_start,
473 .hangup = mxser_hangup,
474 .tiocmget = mxser_tiocmget,
475 .tiocmset = mxser_tiocmset,
476 };
477
478 /*
479 * The MOXA Smartio/Industio serial driver boot-time initialization code!
480 */
481
482 static int __init mxser_module_init(void)
483 {
484 int ret;
485
486 if (verbose)
487 printk(KERN_DEBUG "Loading module mxser ...\n");
488 ret = mxser_init();
489 if (verbose)
490 printk(KERN_DEBUG "Done.\n");
491 return ret;
492 }
493
494 static void __exit mxser_module_exit(void)
495 {
496 int i, err = 0;
497
498 if (verbose)
499 printk(KERN_DEBUG "Unloading module mxser ...\n");
500
501 if ((err |= tty_unregister_driver(mxvar_sdriver)))
502 printk(KERN_ERR "Couldn't unregister MOXA Smartio/Industio family serial driver\n");
503
504 for (i = 0; i < MXSER_BOARDS; i++) {
505 struct pci_dev *pdev;
506
507 if (mxsercfg[i].board_type == -1)
508 continue;
509 else {
510 pdev = mxsercfg[i].pciInfo.pdev;
511 free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
512 if (pdev != NULL) { //PCI
513 release_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2));
514 release_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3));
515 } else {
516 release_region(mxsercfg[i].ioaddr[0], 8 * mxsercfg[i].ports);
517 release_region(mxsercfg[i].vector, 1);
518 }
519 }
520 }
521 if (verbose)
522 printk(KERN_DEBUG "Done.\n");
523
524 }
525
526 static void process_txrx_fifo(struct mxser_struct *info)
527 {
528 int i;
529
530 if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
531 info->rx_trigger = 1;
532 info->rx_high_water = 1;
533 info->rx_low_water = 1;
534 info->xmit_fifo_size = 1;
535 } else {
536 for (i = 0; i < UART_INFO_NUM; i++) {
537 if (info->IsMoxaMustChipFlag == Gpci_uart_info[i].type) {
538 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
539 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
540 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
541 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
542 break;
543 }
544 }
545 }
546 }
547
548 static int mxser_initbrd(int board, struct mxser_hwconf *hwconf)
549 {
550 struct mxser_struct *info;
551 unsigned long flags;
552 int retval;
553 int i, n;
554
555 n = board * MXSER_PORTS_PER_BOARD;
556 info = &mxvar_table[n];
557 /*if (verbose) */ {
558 printk(KERN_DEBUG " ttyM%d - ttyM%d ", n, n + hwconf->ports - 1);
559 printk(" max. baud rate = %d bps.\n", hwconf->MaxCanSetBaudRate[0]);
560 }
561
562 for (i = 0; i < hwconf->ports; i++, n++, info++) {
563 info->port = n;
564 info->base = hwconf->ioaddr[i];
565 info->irq = hwconf->irq;
566 info->vector = hwconf->vector;
567 info->vectormask = hwconf->vector_mask;
568 info->opmode_ioaddr = hwconf->opmode_ioaddr[i]; // add by Victor Yu. 01-05-2004
569 info->stop_rx = 0;
570 info->ldisc_stop_rx = 0;
571
572 info->IsMoxaMustChipFlag = hwconf->IsMoxaMustChipFlag;
573 //Enhance mode enabled here
574 if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
575 ENABLE_MOXA_MUST_ENCHANCE_MODE(info->base);
576 }
577
578 info->flags = ASYNC_SHARE_IRQ;
579 info->type = hwconf->uart_type;
580 info->baud_base = hwconf->baud_base[i];
581
582 info->MaxCanSetBaudRate = hwconf->MaxCanSetBaudRate[i];
583
584 process_txrx_fifo(info);
585
586
587 info->custom_divisor = hwconf->baud_base[i] * 16;
588 info->close_delay = 5 * HZ / 10;
589 info->closing_wait = 30 * HZ;
590 INIT_WORK(&info->tqueue, mxser_do_softint, info);
591 info->normal_termios = mxvar_sdriver->init_termios;
592 init_waitqueue_head(&info->open_wait);
593 init_waitqueue_head(&info->close_wait);
594 init_waitqueue_head(&info->delta_msr_wait);
595 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
596 info->err_shadow = 0;
597 spin_lock_init(&info->slock);
598 }
599 /*
600 * Allocate the IRQ if necessary
601 */
602
603
604 /* before set INT ISR, disable all int */
605 for (i = 0; i < hwconf->ports; i++) {
606 outb(inb(hwconf->ioaddr[i] + UART_IER) & 0xf0, hwconf->ioaddr[i] + UART_IER);
607 }
608
609 n = board * MXSER_PORTS_PER_BOARD;
610 info = &mxvar_table[n];
611
612 retval = request_irq(hwconf->irq, mxser_interrupt, IRQ_T(info), "mxser", info);
613 if (retval) {
614 printk(KERN_ERR "Board %d: %s", board, mxser_brdname[hwconf->board_type - 1]);
615 printk(" Request irq fail,IRQ (%d) may be conflit with another device.\n", info->irq);
616 return retval;
617 }
618 return 0;
619 }
620
621
622 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf)
623 {
624 mxsercfg[board] = *hwconf;
625 }
626
627 #ifdef CONFIG_PCI
628 static int mxser_get_PCI_conf(int busnum, int devnum, int board_type, struct mxser_hwconf *hwconf)
629 {
630 int i, j;
631 // unsigned int val;
632 unsigned int ioaddress;
633 struct pci_dev *pdev = hwconf->pciInfo.pdev;
634
635 //io address
636 hwconf->board_type = board_type;
637 hwconf->ports = mxser_numports[board_type - 1];
638 ioaddress = pci_resource_start(pdev, 2);
639 request_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2), "mxser(IO)");
640
641 for (i = 0; i < hwconf->ports; i++) {
642 hwconf->ioaddr[i] = ioaddress + 8 * i;
643 }
644
645 //vector
646 ioaddress = pci_resource_start(pdev, 3);
647 request_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3), "mxser(vector)");
648 hwconf->vector = ioaddress;
649
650 //irq
651 hwconf->irq = hwconf->pciInfo.pdev->irq;
652
653 hwconf->IsMoxaMustChipFlag = CheckIsMoxaMust(hwconf->ioaddr[0]);
654 hwconf->uart_type = PORT_16550A;
655 hwconf->vector_mask = 0;
656
657
658 for (i = 0; i < hwconf->ports; i++) {
659 for (j = 0; j < UART_INFO_NUM; j++) {
660 if (Gpci_uart_info[j].type == hwconf->IsMoxaMustChipFlag) {
661 hwconf->MaxCanSetBaudRate[i] = Gpci_uart_info[j].max_baud;
662
663 //exception....CP-102
664 if (board_type == MXSER_BOARD_CP102)
665 hwconf->MaxCanSetBaudRate[i] = 921600;
666 break;
667 }
668 }
669 }
670
671 if (hwconf->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID) {
672 for (i = 0; i < hwconf->ports; i++) {
673 if (i < 4)
674 hwconf->opmode_ioaddr[i] = ioaddress + 4;
675 else
676 hwconf->opmode_ioaddr[i] = ioaddress + 0x0c;
677 }
678 outb(0, ioaddress + 4); // default set to RS232 mode
679 outb(0, ioaddress + 0x0c); //default set to RS232 mode
680 }
681
682 for (i = 0; i < hwconf->ports; i++) {
683 hwconf->vector_mask |= (1 << i);
684 hwconf->baud_base[i] = 921600;
685 }
686 return (0);
687 }
688 #endif
689
690 static int mxser_init(void)
691 {
692 int i, m, retval, b, n;
693 int ret1;
694 struct pci_dev *pdev = NULL;
695 int index;
696 unsigned char busnum, devnum;
697 struct mxser_hwconf hwconf;
698
699 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
700 if (!mxvar_sdriver)
701 return -ENOMEM;
702 spin_lock_init(&gm_lock);
703
704 for (i = 0; i < MXSER_BOARDS; i++) {
705 mxsercfg[i].board_type = -1;
706 }
707
708 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n", MXSER_VERSION);
709
710 /* Initialize the tty_driver structure */
711 memset(mxvar_sdriver, 0, sizeof(struct tty_driver));
712 mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
713 mxvar_sdriver->name = "ttyM";
714 mxvar_sdriver->major = ttymajor;
715 mxvar_sdriver->minor_start = 0;
716 mxvar_sdriver->num = MXSER_PORTS + 1;
717 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
718 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
719 mxvar_sdriver->init_termios = tty_std_termios;
720 mxvar_sdriver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
721 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW;
722 tty_set_operations(mxvar_sdriver, &mxser_ops);
723 mxvar_sdriver->ttys = mxvar_tty;
724 mxvar_sdriver->termios = mxvar_termios;
725 mxvar_sdriver->termios_locked = mxvar_termios_locked;
726
727 mxvar_sdriver->open = mxser_open;
728 mxvar_sdriver->close = mxser_close;
729 mxvar_sdriver->write = mxser_write;
730 mxvar_sdriver->put_char = mxser_put_char;
731 mxvar_sdriver->flush_chars = mxser_flush_chars;
732 mxvar_sdriver->write_room = mxser_write_room;
733 mxvar_sdriver->chars_in_buffer = mxser_chars_in_buffer;
734 mxvar_sdriver->flush_buffer = mxser_flush_buffer;
735 mxvar_sdriver->ioctl = mxser_ioctl;
736 mxvar_sdriver->throttle = mxser_throttle;
737 mxvar_sdriver->unthrottle = mxser_unthrottle;
738 mxvar_sdriver->set_termios = mxser_set_termios;
739 mxvar_sdriver->stop = mxser_stop;
740 mxvar_sdriver->start = mxser_start;
741 mxvar_sdriver->hangup = mxser_hangup;
742 mxvar_sdriver->break_ctl = mxser_rs_break;
743 mxvar_sdriver->wait_until_sent = mxser_wait_until_sent;
744
745 mxvar_diagflag = 0;
746 memset(mxvar_table, 0, MXSER_PORTS * sizeof(struct mxser_struct));
747 memset(&mxvar_log, 0, sizeof(struct mxser_log));
748
749 memset(&mxser_msr, 0, sizeof(unsigned char) * (MXSER_PORTS + 1));
750 memset(&mon_data_ext, 0, sizeof(struct mxser_mon_ext));
751 memset(&mxser_set_baud_method, 0, sizeof(int) * (MXSER_PORTS + 1));
752 memset(&hwconf, 0, sizeof(struct mxser_hwconf));
753
754 m = 0;
755 /* Start finding ISA boards here */
756 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
757 int cap;
758 if (!(cap = mxserBoardCAP[b]))
759 continue;
760
761 retval = mxser_get_ISA_conf(cap, &hwconf);
762
763 if (retval != 0)
764 printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n", mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
765
766 if (retval <= 0) {
767 if (retval == MXSER_ERR_IRQ)
768 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
769 else if (retval == MXSER_ERR_IRQ_CONFLIT)
770 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
771 else if (retval == MXSER_ERR_VECTOR)
772 printk(KERN_ERR "Invalid interrupt vector,board not configured\n");
773 else if (retval == MXSER_ERR_IOADDR)
774 printk(KERN_ERR "Invalid I/O address,board not configured\n");
775
776 continue;
777 }
778
779 hwconf.pciInfo.busNum = 0;
780 hwconf.pciInfo.devNum = 0;
781 hwconf.pciInfo.pdev = NULL;
782
783 mxser_getcfg(m, &hwconf);
784 //init mxsercfg first, or mxsercfg data is not correct on ISR.
785 //mxser_initbrd will hook ISR.
786 if (mxser_initbrd(m, &hwconf) < 0)
787 continue;
788
789
790 m++;
791 }
792
793 /* Start finding ISA boards from module arg */
794 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
795 int cap;
796 if (!(cap = ioaddr[b]))
797 continue;
798
799 retval = mxser_get_ISA_conf(cap, &hwconf);
800
801 if (retval != 0)
802 printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n", mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
803
804 if (retval <= 0) {
805 if (retval == MXSER_ERR_IRQ)
806 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
807 else if (retval == MXSER_ERR_IRQ_CONFLIT)
808 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
809 else if (retval == MXSER_ERR_VECTOR)
810 printk(KERN_ERR "Invalid interrupt vector,board not configured\n");
811 else if (retval == MXSER_ERR_IOADDR)
812 printk(KERN_ERR "Invalid I/O address,board not configured\n");
813
814 continue;
815 }
816
817 hwconf.pciInfo.busNum = 0;
818 hwconf.pciInfo.devNum = 0;
819 hwconf.pciInfo.pdev = NULL;
820
821 mxser_getcfg(m, &hwconf);
822 //init mxsercfg first, or mxsercfg data is not correct on ISR.
823 //mxser_initbrd will hook ISR.
824 if (mxser_initbrd(m, &hwconf) < 0)
825 continue;
826
827 m++;
828 }
829
830 /* start finding PCI board here */
831 #ifdef CONFIG_PCI
832 n = (sizeof(mxser_pcibrds) / sizeof(mxser_pcibrds[0])) - 1;
833 index = 0;
834 b = 0;
835 while (b < n) {
836 pdev = pci_find_device(mxser_pcibrds[b].vendor, mxser_pcibrds[b].device, pdev);
837 if (pdev == NULL) {
838 b++;
839 continue;
840 }
841 hwconf.pciInfo.busNum = busnum = pdev->bus->number;
842 hwconf.pciInfo.devNum = devnum = PCI_SLOT(pdev->devfn) << 3;
843 hwconf.pciInfo.pdev = pdev;
844 printk(KERN_INFO "Found MOXA %s board(BusNo=%d,DevNo=%d)\n", mxser_brdname[(int) (mxser_pcibrds[b].driver_data) - 1], busnum, devnum >> 3);
845 index++;
846 if (m >= MXSER_BOARDS) {
847 printk(KERN_ERR "Too many Smartio/Industio family boards find (maximum %d),board not configured\n", MXSER_BOARDS);
848 } else {
849 if (pci_enable_device(pdev)) {
850 printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
851 continue;
852 }
853 retval = mxser_get_PCI_conf(busnum, devnum, (int) mxser_pcibrds[b].driver_data, &hwconf);
854 if (retval < 0) {
855 if (retval == MXSER_ERR_IRQ)
856 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
857 else if (retval == MXSER_ERR_IRQ_CONFLIT)
858 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
859 else if (retval == MXSER_ERR_VECTOR)
860 printk(KERN_ERR "Invalid interrupt vector,board not configured\n");
861 else if (retval == MXSER_ERR_IOADDR)
862 printk(KERN_ERR "Invalid I/O address,board not configured\n");
863 continue;
864 }
865 mxser_getcfg(m, &hwconf);
866 //init mxsercfg first, or mxsercfg data is not correct on ISR.
867 //mxser_initbrd will hook ISR.
868 if (mxser_initbrd(m, &hwconf) < 0)
869 continue;
870 m++;
871 }
872 }
873 #endif
874
875 ret1 = 0;
876 if (!(ret1 = tty_register_driver(mxvar_sdriver))) {
877 return 0;
878 } else
879 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family driver !\n");
880
881
882 if (ret1) {
883 for (i = 0; i < MXSER_BOARDS; i++) {
884 if (mxsercfg[i].board_type == -1)
885 continue;
886 else {
887 free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
888 //todo: release io, vector
889 }
890 }
891 return -1;
892 }
893
894 return (0);
895 }
896
897 static void mxser_do_softint(void *private_)
898 {
899 struct mxser_struct *info = (struct mxser_struct *) private_;
900 struct tty_struct *tty;
901
902 tty = info->tty;
903
904 if (tty) {
905 if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
906 tty_wakeup(tty);
907 if (test_and_clear_bit(MXSER_EVENT_HANGUP, &info->event))
908 tty_hangup(tty);
909 }
910 }
911
912 static unsigned char mxser_get_msr(int baseaddr, int mode, int port, struct mxser_struct *info)
913 {
914 unsigned char status = 0;
915
916 status = inb(baseaddr + UART_MSR);
917
918 mxser_msr[port] &= 0x0F;
919 mxser_msr[port] |= status;
920 status = mxser_msr[port];
921 if (mode)
922 mxser_msr[port] = 0;
923
924 return status;
925 }
926
927 /*
928 * This routine is called whenever a serial port is opened. It
929 * enables interrupts for a serial port, linking in its async structure into
930 * the IRQ chain. It also performs the serial-specific
931 * initialization for the tty structure.
932 */
933 static int mxser_open(struct tty_struct *tty, struct file *filp)
934 {
935 struct mxser_struct *info;
936 int retval, line;
937
938 line = tty->index;
939 if (line == MXSER_PORTS)
940 return 0;
941 if (line < 0 || line > MXSER_PORTS)
942 return -ENODEV;
943 info = mxvar_table + line;
944 if (!info->base)
945 return (-ENODEV);
946
947 tty->driver_data = info;
948 info->tty = tty;
949 /*
950 * Start up serial port
951 */
952 retval = mxser_startup(info);
953 if (retval)
954 return (retval);
955
956 retval = mxser_block_til_ready(tty, filp, info);
957 if (retval)
958 return (retval);
959
960 info->count++;
961
962 if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
963 if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
964 *tty->termios = info->normal_termios;
965 else
966 *tty->termios = info->callout_termios;
967 mxser_change_speed(info, NULL);
968 }
969
970 info->session = current->signal->session;
971 info->pgrp = process_group(current);
972 clear_bit(TTY_DONT_FLIP, &tty->flags);
973
974 //status = mxser_get_msr(info->base, 0, info->port);
975 //mxser_check_modem_status(info, status);
976
977 /* unmark here for very high baud rate (ex. 921600 bps) used
978 */
979 tty->low_latency = 1;
980 return 0;
981 }
982
983 /*
984 * This routine is called when the serial port gets closed. First, we
985 * wait for the last remaining data to be sent. Then, we unlink its
986 * async structure from the interrupt chain if necessary, and we free
987 * that IRQ if nothing is left in the chain.
988 */
989 static void mxser_close(struct tty_struct *tty, struct file *filp)
990 {
991 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
992
993 unsigned long timeout;
994 unsigned long flags;
995 struct tty_ldisc *ld;
996
997 if (tty->index == MXSER_PORTS)
998 return;
999 if (!info)
1000 BUG();
1001
1002 spin_lock_irqsave(&info->slock, flags);
1003
1004 if (tty_hung_up_p(filp)) {
1005 spin_unlock_irqrestore(&info->slock, flags);
1006 return;
1007 }
1008 if ((tty->count == 1) && (info->count != 1)) {
1009 /*
1010 * Uh, oh. tty->count is 1, which means that the tty
1011 * structure will be freed. Info->count should always
1012 * be one in these conditions. If it's greater than
1013 * one, we've got real problems, since it means the
1014 * serial port won't be shutdown.
1015 */
1016 printk(KERN_ERR "mxser_close: bad serial port count; tty->count is 1, " "info->count is %d\n", info->count);
1017 info->count = 1;
1018 }
1019 if (--info->count < 0) {
1020 printk(KERN_ERR "mxser_close: bad serial port count for ttys%d: %d\n", info->port, info->count);
1021 info->count = 0;
1022 }
1023 if (info->count) {
1024 spin_unlock_irqrestore(&info->slock, flags);
1025 return;
1026 }
1027 info->flags |= ASYNC_CLOSING;
1028 spin_unlock_irqrestore(&info->slock, flags);
1029 /*
1030 * Save the termios structure, since this port may have
1031 * separate termios for callout and dialin.
1032 */
1033 if (info->flags & ASYNC_NORMAL_ACTIVE)
1034 info->normal_termios = *tty->termios;
1035 /*
1036 * Now we wait for the transmit buffer to clear; and we notify
1037 * the line discipline to only process XON/XOFF characters.
1038 */
1039 tty->closing = 1;
1040 if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1041 tty_wait_until_sent(tty, info->closing_wait);
1042 /*
1043 * At this point we stop accepting input. To do this, we
1044 * disable the receive line status interrupts, and tell the
1045 * interrupt driver to stop checking the data ready bit in the
1046 * line status register.
1047 */
1048 info->IER &= ~UART_IER_RLSI;
1049 if (info->IsMoxaMustChipFlag)
1050 info->IER &= ~MOXA_MUST_RECV_ISR;
1051 /* by William
1052 info->read_status_mask &= ~UART_LSR_DR;
1053 */
1054 if (info->flags & ASYNC_INITIALIZED) {
1055 outb(info->IER, info->base + UART_IER);
1056 /*
1057 * Before we drop DTR, make sure the UART transmitter
1058 * has completely drained; this is especially
1059 * important if there is a transmit FIFO!
1060 */
1061 timeout = jiffies + HZ;
1062 while (!(inb(info->base + UART_LSR) & UART_LSR_TEMT)) {
1063 set_current_state(TASK_INTERRUPTIBLE);
1064 schedule_timeout(5);
1065 if (time_after(jiffies, timeout))
1066 break;
1067 }
1068 }
1069 mxser_shutdown(info);
1070
1071 if (tty->driver->flush_buffer)
1072 tty->driver->flush_buffer(tty);
1073
1074 ld = tty_ldisc_ref(tty);
1075 if (ld) {
1076 if(ld->flush_buffer)
1077 ld->flush_buffer(tty);
1078 tty_ldisc_deref(ld);
1079 }
1080
1081 tty->closing = 0;
1082 info->event = 0;
1083 info->tty = NULL;
1084 if (info->blocked_open) {
1085 if (info->close_delay) {
1086 set_current_state(TASK_INTERRUPTIBLE);
1087 schedule_timeout(info->close_delay);
1088 }
1089 wake_up_interruptible(&info->open_wait);
1090 }
1091
1092 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1093 wake_up_interruptible(&info->close_wait);
1094
1095 }
1096
1097 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1098 {
1099 int c, total = 0;
1100 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1101 unsigned long flags;
1102
1103 if (!tty || !info->xmit_buf)
1104 return (0);
1105
1106 while (1) {
1107 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, SERIAL_XMIT_SIZE - info->xmit_head));
1108 if (c <= 0)
1109 break;
1110
1111 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1112 spin_lock_irqsave(&info->slock, flags);
1113 info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE - 1);
1114 info->xmit_cnt += c;
1115 spin_unlock_irqrestore(&info->slock, flags);
1116
1117 buf += c;
1118 count -= c;
1119 total += c;
1120
1121 }
1122
1123 if (info->xmit_cnt && !tty->stopped && !(info->IER & UART_IER_THRI)) {
1124 if (!tty->hw_stopped || (info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
1125 spin_lock_irqsave(&info->slock, flags);
1126 info->IER |= UART_IER_THRI;
1127 outb(info->IER, info->base + UART_IER);
1128 spin_unlock_irqrestore(&info->slock, flags);
1129 }
1130 }
1131 return total;
1132 }
1133
1134 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1135 {
1136 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1137 unsigned long flags;
1138
1139 if (!tty || !info->xmit_buf)
1140 return;
1141
1142 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1143 return;
1144
1145 spin_lock_irqsave(&info->slock, flags);
1146 info->xmit_buf[info->xmit_head++] = ch;
1147 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1148 info->xmit_cnt++;
1149 spin_unlock_irqrestore(&info->slock, flags);
1150 if (!tty->stopped && !(info->IER & UART_IER_THRI)) {
1151 if (!tty->hw_stopped || (info->type == PORT_16550A) || info->IsMoxaMustChipFlag) {
1152 spin_lock_irqsave(&info->slock, flags);
1153 info->IER |= UART_IER_THRI;
1154 outb(info->IER, info->base + UART_IER);
1155 spin_unlock_irqrestore(&info->slock, flags);
1156 }
1157 }
1158 }
1159
1160
1161 static void mxser_flush_chars(struct tty_struct *tty)
1162 {
1163 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1164 unsigned long flags;
1165
1166 if (info->xmit_cnt <= 0 || tty->stopped || !info->xmit_buf || (tty->hw_stopped && (info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)))
1167 return;
1168
1169 spin_lock_irqsave(&info->slock, flags);
1170
1171 info->IER |= UART_IER_THRI;
1172 outb(info->IER, info->base + UART_IER);
1173
1174 spin_unlock_irqrestore(&info->slock, flags);
1175 }
1176
1177 static int mxser_write_room(struct tty_struct *tty)
1178 {
1179 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1180 int ret;
1181
1182 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1183 if (ret < 0)
1184 ret = 0;
1185 return (ret);
1186 }
1187
1188 static int mxser_chars_in_buffer(struct tty_struct *tty)
1189 {
1190 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1191 return info->xmit_cnt;
1192 }
1193
1194 static void mxser_flush_buffer(struct tty_struct *tty)
1195 {
1196 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1197 char fcr;
1198 unsigned long flags;
1199
1200
1201 spin_lock_irqsave(&info->slock, flags);
1202 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1203
1204 /* below added by shinhay */
1205 fcr = inb(info->base + UART_FCR);
1206 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
1207 outb(fcr, info->base + UART_FCR);
1208
1209 spin_unlock_irqrestore(&info->slock, flags);
1210 /* above added by shinhay */
1211
1212 wake_up_interruptible(&tty->write_wait);
1213 if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
1214 (tty->ldisc.write_wakeup) (tty);
1215 }
1216
1217 static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1218 {
1219 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1220 int retval;
1221 struct async_icount cprev, cnow; /* kernel counter temps */
1222 struct serial_icounter_struct __user *p_cuser;
1223 unsigned long templ;
1224 unsigned long flags;
1225 void __user *argp = (void __user *)arg;
1226
1227 if (tty->index == MXSER_PORTS)
1228 return (mxser_ioctl_special(cmd, argp));
1229
1230 // following add by Victor Yu. 01-05-2004
1231 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1232 int opmode, p;
1233 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1234 int shiftbit;
1235 unsigned char val, mask;
1236
1237 p = info->port % 4;
1238 if (cmd == MOXA_SET_OP_MODE) {
1239 if (get_user(opmode, (int __user *) argp))
1240 return -EFAULT;
1241 if (opmode != RS232_MODE && opmode != RS485_2WIRE_MODE && opmode != RS422_MODE && opmode != RS485_4WIRE_MODE)
1242 return -EFAULT;
1243 mask = ModeMask[p];
1244 shiftbit = p * 2;
1245 val = inb(info->opmode_ioaddr);
1246 val &= mask;
1247 val |= (opmode << shiftbit);
1248 outb(val, info->opmode_ioaddr);
1249 } else {
1250 shiftbit = p * 2;
1251 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1252 opmode &= OP_MODE_MASK;
1253 if (copy_to_user(argp, &opmode, sizeof(int)))
1254 return -EFAULT;
1255 }
1256 return 0;
1257 }
1258 // above add by Victor Yu. 01-05-2004
1259
1260 if ((cmd != TIOCGSERIAL) && (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1261 if (tty->flags & (1 << TTY_IO_ERROR))
1262 return (-EIO);
1263 }
1264 switch (cmd) {
1265 case TCSBRK: /* SVID version: non-zero arg --> no break */
1266 retval = tty_check_change(tty);
1267 if (retval)
1268 return (retval);
1269 tty_wait_until_sent(tty, 0);
1270 if (!arg)
1271 mxser_send_break(info, HZ / 4); /* 1/4 second */
1272 return (0);
1273 case TCSBRKP: /* support for POSIX tcsendbreak() */
1274 retval = tty_check_change(tty);
1275 if (retval)
1276 return (retval);
1277 tty_wait_until_sent(tty, 0);
1278 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1279 return (0);
1280 case TIOCGSOFTCAR:
1281 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *) argp);
1282 case TIOCSSOFTCAR:
1283 if (get_user(templ, (unsigned long __user *) argp))
1284 return -EFAULT;
1285 arg = templ;
1286 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1287 return (0);
1288 case TIOCGSERIAL:
1289 return mxser_get_serial_info(info, argp);
1290 case TIOCSSERIAL:
1291 return mxser_set_serial_info(info, argp);
1292 case TIOCSERGETLSR: /* Get line status register */
1293 return mxser_get_lsr_info(info, argp);
1294 /*
1295 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1296 * - mask passed in arg for lines of interest
1297 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1298 * Caller should use TIOCGICOUNT to see which one it was
1299 */
1300 case TIOCMIWAIT:{
1301 DECLARE_WAITQUEUE(wait, current);
1302 int ret;
1303 spin_lock_irqsave(&info->slock, flags);
1304 cprev = info->icount; /* note the counters on entry */
1305 spin_unlock_irqrestore(&info->slock, flags);
1306
1307 add_wait_queue(&info->delta_msr_wait, &wait);
1308 while (1) {
1309 spin_lock_irqsave(&info->slock, flags);
1310 cnow = info->icount; /* atomic copy */
1311 spin_unlock_irqrestore(&info->slock, flags);
1312
1313 set_current_state(TASK_INTERRUPTIBLE);
1314 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))) {
1315 ret = 0;
1316 break;
1317 }
1318 /* see if a signal did it */
1319 if (signal_pending(current)) {
1320 ret = -ERESTARTSYS;
1321 break;
1322 }
1323 cprev = cnow;
1324 }
1325 current->state = TASK_RUNNING;
1326 remove_wait_queue(&info->delta_msr_wait, &wait);
1327 break;
1328 }
1329 /* NOTREACHED */
1330 /*
1331 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1332 * Return: write counters to the user passed counter struct
1333 * NB: both 1->0 and 0->1 transitions are counted except for
1334 * RI where only 0->1 is counted.
1335 */
1336 case TIOCGICOUNT:
1337 spin_lock_irqsave(&info->slock, flags);
1338 cnow = info->icount;
1339 spin_unlock_irqrestore(&info->slock, flags);
1340 p_cuser = argp;
1341 /* modified by casper 1/11/2000 */
1342 if (put_user(cnow.frame, &p_cuser->frame))
1343 return -EFAULT;
1344 if (put_user(cnow.brk, &p_cuser->brk))
1345 return -EFAULT;
1346 if (put_user(cnow.overrun, &p_cuser->overrun))
1347 return -EFAULT;
1348 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1349 return -EFAULT;
1350 if (put_user(cnow.parity, &p_cuser->parity))
1351 return -EFAULT;
1352 if (put_user(cnow.rx, &p_cuser->rx))
1353 return -EFAULT;
1354 if (put_user(cnow.tx, &p_cuser->tx))
1355 return -EFAULT;
1356 put_user(cnow.cts, &p_cuser->cts);
1357 put_user(cnow.dsr, &p_cuser->dsr);
1358 put_user(cnow.rng, &p_cuser->rng);
1359 put_user(cnow.dcd, &p_cuser->dcd);
1360
1361 /* */
1362 return 0;
1363 case MOXA_HighSpeedOn:
1364 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *) argp);
1365
1366 case MOXA_SDS_RSTICOUNTER:{
1367 info->mon_data.rxcnt = 0;
1368 info->mon_data.txcnt = 0;
1369 return 0;
1370 }
1371 // (above) added by James.
1372 case MOXA_ASPP_SETBAUD:{
1373 long baud;
1374 if (get_user(baud, (long __user *) argp))
1375 return -EFAULT;
1376 mxser_set_baud(info, baud);
1377 return 0;
1378 }
1379 case MOXA_ASPP_GETBAUD:
1380 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1381 return -EFAULT;
1382
1383 return 0;
1384
1385 case MOXA_ASPP_OQUEUE:{
1386 int len, lsr;
1387
1388 len = mxser_chars_in_buffer(tty);
1389
1390 lsr = inb(info->base + UART_LSR) & UART_LSR_TEMT;
1391
1392 len += (lsr ? 0 : 1);
1393
1394 if (copy_to_user(argp, &len, sizeof(int)))
1395 return -EFAULT;
1396
1397 return 0;
1398 }
1399 case MOXA_ASPP_MON:{
1400 int mcr, status;
1401 // info->mon_data.ser_param = tty->termios->c_cflag;
1402
1403 status = mxser_get_msr(info->base, 1, info->port, info);
1404 mxser_check_modem_status(info, status);
1405
1406 mcr = inb(info->base + UART_MCR);
1407 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1408 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1409 else
1410 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1411
1412 if (mcr & MOXA_MUST_MCR_TX_XON)
1413 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1414 else
1415 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1416
1417 if (info->tty->hw_stopped)
1418 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1419 else
1420 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1421
1422
1423 if (copy_to_user(argp, &info->mon_data, sizeof(struct mxser_mon)))
1424 return -EFAULT;
1425
1426 return 0;
1427
1428 }
1429
1430 case MOXA_ASPP_LSTATUS:{
1431 if (copy_to_user(argp, &info->err_shadow, sizeof(unsigned char)))
1432 return -EFAULT;
1433
1434 info->err_shadow = 0;
1435 return 0;
1436
1437 }
1438 case MOXA_SET_BAUD_METHOD:{
1439 int method;
1440 if (get_user(method, (int __user *) argp))
1441 return -EFAULT;
1442 mxser_set_baud_method[info->port] = method;
1443 if (copy_to_user(argp, &method, sizeof(int)))
1444 return -EFAULT;
1445
1446 return 0;
1447 }
1448 default:
1449 return -ENOIOCTLCMD;
1450 }
1451 return 0;
1452 }
1453
1454 #ifndef CMSPAR
1455 #define CMSPAR 010000000000
1456 #endif
1457
1458 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1459 {
1460 int i, result, status;
1461
1462 switch (cmd) {
1463 case MOXA_GET_CONF:
1464 if (copy_to_user(argp, mxsercfg, sizeof(struct mxser_hwconf) * 4))
1465 return -EFAULT;
1466 return 0;
1467 case MOXA_GET_MAJOR:
1468 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1469 return -EFAULT;
1470 return 0;
1471
1472 case MOXA_GET_CUMAJOR:
1473 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1474 return -EFAULT;
1475 return 0;
1476
1477 case MOXA_CHKPORTENABLE:
1478 result = 0;
1479 for (i = 0; i < MXSER_PORTS; i++) {
1480 if (mxvar_table[i].base)
1481 result |= (1 << i);
1482 }
1483 return put_user(result, (unsigned long __user *) argp);
1484 case MOXA_GETDATACOUNT:
1485 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1486 return -EFAULT;
1487 return (0);
1488 case MOXA_GETMSTATUS:
1489 for (i = 0; i < MXSER_PORTS; i++) {
1490 GMStatus[i].ri = 0;
1491 if (!mxvar_table[i].base) {
1492 GMStatus[i].dcd = 0;
1493 GMStatus[i].dsr = 0;
1494 GMStatus[i].cts = 0;
1495 continue;
1496 }
1497
1498 if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios)
1499 GMStatus[i].cflag = mxvar_table[i].normal_termios.c_cflag;
1500 else
1501 GMStatus[i].cflag = mxvar_table[i].tty->termios->c_cflag;
1502
1503 status = inb(mxvar_table[i].base + UART_MSR);
1504 if (status & 0x80 /*UART_MSR_DCD */ )
1505 GMStatus[i].dcd = 1;
1506 else
1507 GMStatus[i].dcd = 0;
1508
1509 if (status & 0x20 /*UART_MSR_DSR */ )
1510 GMStatus[i].dsr = 1;
1511 else
1512 GMStatus[i].dsr = 0;
1513
1514
1515 if (status & 0x10 /*UART_MSR_CTS */ )
1516 GMStatus[i].cts = 1;
1517 else
1518 GMStatus[i].cts = 0;
1519 }
1520 if (copy_to_user(argp, GMStatus, sizeof(struct mxser_mstatus) * MXSER_PORTS))
1521 return -EFAULT;
1522 return 0;
1523 case MOXA_ASPP_MON_EXT:{
1524 int status;
1525 int opmode, p;
1526 int shiftbit;
1527 unsigned cflag, iflag;
1528
1529 for (i = 0; i < MXSER_PORTS; i++) {
1530
1531 if (!mxvar_table[i].base)
1532 continue;
1533
1534 status = mxser_get_msr(mxvar_table[i].base, 0, i, &(mxvar_table[i]));
1535 // mxser_check_modem_status(&mxvar_table[i], status);
1536 if (status & UART_MSR_TERI)
1537 mxvar_table[i].icount.rng++;
1538 if (status & UART_MSR_DDSR)
1539 mxvar_table[i].icount.dsr++;
1540 if (status & UART_MSR_DDCD)
1541 mxvar_table[i].icount.dcd++;
1542 if (status & UART_MSR_DCTS)
1543 mxvar_table[i].icount.cts++;
1544
1545 mxvar_table[i].mon_data.modem_status = status;
1546 mon_data_ext.rx_cnt[i] = mxvar_table[i].mon_data.rxcnt;
1547 mon_data_ext.tx_cnt[i] = mxvar_table[i].mon_data.txcnt;
1548 mon_data_ext.up_rxcnt[i] = mxvar_table[i].mon_data.up_rxcnt;
1549 mon_data_ext.up_txcnt[i] = mxvar_table[i].mon_data.up_txcnt;
1550 mon_data_ext.modem_status[i] = mxvar_table[i].mon_data.modem_status;
1551 mon_data_ext.baudrate[i] = mxvar_table[i].realbaud;
1552
1553 if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios) {
1554 cflag = mxvar_table[i].normal_termios.c_cflag;
1555 iflag = mxvar_table[i].normal_termios.c_iflag;
1556 } else {
1557 cflag = mxvar_table[i].tty->termios->c_cflag;
1558 iflag = mxvar_table[i].tty->termios->c_iflag;
1559 }
1560
1561 mon_data_ext.databits[i] = cflag & CSIZE;
1562
1563 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1564
1565 mon_data_ext.parity[i] = cflag & (PARENB | PARODD | CMSPAR);
1566
1567 mon_data_ext.flowctrl[i] = 0x00;
1568
1569 if (cflag & CRTSCTS)
1570 mon_data_ext.flowctrl[i] |= 0x03;
1571
1572 if (iflag & (IXON | IXOFF))
1573 mon_data_ext.flowctrl[i] |= 0x0C;
1574
1575 if (mxvar_table[i].type == PORT_16550A)
1576 mon_data_ext.fifo[i] = 1;
1577 else
1578 mon_data_ext.fifo[i] = 0;
1579
1580 p = i % 4;
1581 shiftbit = p * 2;
1582 opmode = inb(mxvar_table[i].opmode_ioaddr) >> shiftbit;
1583 opmode &= OP_MODE_MASK;
1584
1585 mon_data_ext.iftype[i] = opmode;
1586
1587 }
1588 if (copy_to_user(argp, &mon_data_ext, sizeof(struct mxser_mon_ext)))
1589 return -EFAULT;
1590
1591 return 0;
1592
1593 }
1594 default:
1595 return -ENOIOCTLCMD;
1596 }
1597 return 0;
1598 }
1599
1600
1601 static void mxser_stoprx(struct tty_struct *tty)
1602 {
1603 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1604 //unsigned long flags;
1605
1606
1607 info->ldisc_stop_rx = 1;
1608 if (I_IXOFF(tty)) {
1609
1610 //MX_LOCK(&info->slock);
1611 // following add by Victor Yu. 09-02-2002
1612 if (info->IsMoxaMustChipFlag) {
1613 info->IER &= ~MOXA_MUST_RECV_ISR;
1614 outb(info->IER, info->base + UART_IER);
1615 } else {
1616 // above add by Victor Yu. 09-02-2002
1617
1618 info->x_char = STOP_CHAR(tty);
1619 // outb(info->IER, 0); // mask by Victor Yu. 09-02-2002
1620 outb(0, info->base + UART_IER);
1621 info->IER |= UART_IER_THRI;
1622 outb(info->IER, info->base + UART_IER); /* force Tx interrupt */
1623 } // add by Victor Yu. 09-02-2002
1624 //MX_UNLOCK(&info->slock);
1625 }
1626
1627 if (info->tty->termios->c_cflag & CRTSCTS) {
1628 //MX_LOCK(&info->slock);
1629 info->MCR &= ~UART_MCR_RTS;
1630 outb(info->MCR, info->base + UART_MCR);
1631 //MX_UNLOCK(&info->slock);
1632 }
1633 }
1634
1635 static void mxser_startrx(struct tty_struct *tty)
1636 {
1637 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1638 //unsigned long flags;
1639
1640 info->ldisc_stop_rx = 0;
1641 if (I_IXOFF(tty)) {
1642 if (info->x_char)
1643 info->x_char = 0;
1644 else {
1645 //MX_LOCK(&info->slock);
1646
1647 // following add by Victor Yu. 09-02-2002
1648 if (info->IsMoxaMustChipFlag) {
1649 info->IER |= MOXA_MUST_RECV_ISR;
1650 outb(info->IER, info->base + UART_IER);
1651 } else {
1652 // above add by Victor Yu. 09-02-2002
1653
1654 info->x_char = START_CHAR(tty);
1655 // outb(info->IER, 0); // mask by Victor Yu. 09-02-2002
1656 outb(0, info->base + UART_IER); // add by Victor Yu. 09-02-2002
1657 info->IER |= UART_IER_THRI; /* force Tx interrupt */
1658 outb(info->IER, info->base + UART_IER);
1659 } // add by Victor Yu. 09-02-2002
1660 //MX_UNLOCK(&info->slock);
1661 }
1662 }
1663
1664 if (info->tty->termios->c_cflag & CRTSCTS) {
1665 //MX_LOCK(&info->slock);
1666 info->MCR |= UART_MCR_RTS;
1667 outb(info->MCR, info->base + UART_MCR);
1668 //MX_UNLOCK(&info->slock);
1669 }
1670 }
1671
1672 /*
1673 * This routine is called by the upper-layer tty layer to signal that
1674 * incoming characters should be throttled.
1675 */
1676 static void mxser_throttle(struct tty_struct *tty)
1677 {
1678 //struct mxser_struct *info = (struct mxser_struct *)tty->driver_data;
1679 //unsigned long flags;
1680 //MX_LOCK(&info->slock);
1681 mxser_stoprx(tty);
1682 //MX_UNLOCK(&info->slock);
1683 }
1684
1685 static void mxser_unthrottle(struct tty_struct *tty)
1686 {
1687 //struct mxser_struct *info = (struct mxser_struct *)tty->driver_data;
1688 //unsigned long flags;
1689 //MX_LOCK(&info->slock);
1690 mxser_startrx(tty);
1691 //MX_UNLOCK(&info->slock);
1692 }
1693
1694 static void mxser_set_termios(struct tty_struct *tty, struct termios *old_termios)
1695 {
1696 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1697 unsigned long flags;
1698
1699 if ((tty->termios->c_cflag != old_termios->c_cflag) || (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
1700
1701 mxser_change_speed(info, old_termios);
1702
1703 if ((old_termios->c_cflag & CRTSCTS) && !(tty->termios->c_cflag & CRTSCTS)) {
1704 tty->hw_stopped = 0;
1705 mxser_start(tty);
1706 }
1707 }
1708
1709 /* Handle sw stopped */
1710 if ((old_termios->c_iflag & IXON) && !(tty->termios->c_iflag & IXON)) {
1711 tty->stopped = 0;
1712
1713 // following add by Victor Yu. 09-02-2002
1714 if (info->IsMoxaMustChipFlag) {
1715 spin_lock_irqsave(&info->slock, flags);
1716 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
1717 spin_unlock_irqrestore(&info->slock, flags);
1718 }
1719 // above add by Victor Yu. 09-02-2002
1720
1721 mxser_start(tty);
1722 }
1723 }
1724
1725 /*
1726 * mxser_stop() and mxser_start()
1727 *
1728 * This routines are called before setting or resetting tty->stopped.
1729 * They enable or disable transmitter interrupts, as necessary.
1730 */
1731 static void mxser_stop(struct tty_struct *tty)
1732 {
1733 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1734 unsigned long flags;
1735
1736 spin_lock_irqsave(&info->slock, flags);
1737 if (info->IER & UART_IER_THRI) {
1738 info->IER &= ~UART_IER_THRI;
1739 outb(info->IER, info->base + UART_IER);
1740 }
1741 spin_unlock_irqrestore(&info->slock, flags);
1742 }
1743
1744 static void mxser_start(struct tty_struct *tty)
1745 {
1746 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1747 unsigned long flags;
1748
1749 spin_lock_irqsave(&info->slock, flags);
1750 if (info->xmit_cnt && info->xmit_buf && !(info->IER & UART_IER_THRI)) {
1751 info->IER |= UART_IER_THRI;
1752 outb(info->IER, info->base + UART_IER);
1753 }
1754 spin_unlock_irqrestore(&info->slock, flags);
1755 }
1756
1757 /*
1758 * mxser_wait_until_sent() --- wait until the transmitter is empty
1759 */
1760 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1761 {
1762 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1763 unsigned long orig_jiffies, char_time;
1764 int lsr;
1765
1766 if (info->type == PORT_UNKNOWN)
1767 return;
1768
1769 if (info->xmit_fifo_size == 0)
1770 return; /* Just in case.... */
1771
1772 orig_jiffies = jiffies;
1773 /*
1774 * Set the check interval to be 1/5 of the estimated time to
1775 * send a single character, and make it at least 1. The check
1776 * interval should also be less than the timeout.
1777 *
1778 * Note: we have to use pretty tight timings here to satisfy
1779 * the NIST-PCTS.
1780 */
1781 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1782 char_time = char_time / 5;
1783 if (char_time == 0)
1784 char_time = 1;
1785 if (timeout && timeout < char_time)
1786 char_time = timeout;
1787 /*
1788 * If the transmitter hasn't cleared in twice the approximate
1789 * amount of time to send the entire FIFO, it probably won't
1790 * ever clear. This assumes the UART isn't doing flow
1791 * control, which is currently the case. Hence, if it ever
1792 * takes longer than info->timeout, this is probably due to a
1793 * UART bug of some kind. So, we clamp the timeout parameter at
1794 * 2*info->timeout.
1795 */
1796 if (!timeout || timeout > 2 * info->timeout)
1797 timeout = 2 * info->timeout;
1798 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1799 printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...", timeout, char_time);
1800 printk("jiff=%lu...", jiffies);
1801 #endif
1802 while (!((lsr = inb(info->base + UART_LSR)) & UART_LSR_TEMT)) {
1803 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1804 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1805 #endif
1806 set_current_state(TASK_INTERRUPTIBLE);
1807 schedule_timeout(char_time);
1808 if (signal_pending(current))
1809 break;
1810 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1811 break;
1812 }
1813 set_current_state(TASK_RUNNING);
1814
1815 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1816 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1817 #endif
1818 }
1819
1820
1821 /*
1822 * This routine is called by tty_hangup() when a hangup is signaled.
1823 */
1824 void mxser_hangup(struct tty_struct *tty)
1825 {
1826 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1827
1828 mxser_flush_buffer(tty);
1829 mxser_shutdown(info);
1830 info->event = 0;
1831 info->count = 0;
1832 info->flags &= ~ASYNC_NORMAL_ACTIVE;
1833 info->tty = NULL;
1834 wake_up_interruptible(&info->open_wait);
1835 }
1836
1837
1838 // added by James 03-12-2004.
1839 /*
1840 * mxser_rs_break() --- routine which turns the break handling on or off
1841 */
1842 static void mxser_rs_break(struct tty_struct *tty, int break_state)
1843 {
1844 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1845 unsigned long flags;
1846
1847 spin_lock_irqsave(&info->slock, flags);
1848 if (break_state == -1)
1849 outb(inb(info->base + UART_LCR) | UART_LCR_SBC, info->base + UART_LCR);
1850 else
1851 outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC, info->base + UART_LCR);
1852 spin_unlock_irqrestore(&info->slock, flags);
1853 }
1854
1855 // (above) added by James.
1856
1857
1858 /*
1859 * This is the serial driver's generic interrupt routine
1860 */
1861 static irqreturn_t mxser_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1862 {
1863 int status, iir, i;
1864 struct mxser_struct *info;
1865 struct mxser_struct *port;
1866 int max, irqbits, bits, msr;
1867 int pass_counter = 0;
1868 int handled = IRQ_NONE;
1869
1870 port = NULL;
1871 //spin_lock(&gm_lock);
1872
1873 for (i = 0; i < MXSER_BOARDS; i++) {
1874 if (dev_id == &(mxvar_table[i * MXSER_PORTS_PER_BOARD])) {
1875 port = dev_id;
1876 break;
1877 }
1878 }
1879
1880 if (i == MXSER_BOARDS) {
1881 goto irq_stop;
1882 }
1883 if (port == 0) {
1884 goto irq_stop;
1885 }
1886 max = mxser_numports[mxsercfg[i].board_type - 1];
1887 while (1) {
1888 irqbits = inb(port->vector) & port->vectormask;
1889 if (irqbits == port->vectormask) {
1890 break;
1891 }
1892
1893 handled = IRQ_HANDLED;
1894 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
1895 if (irqbits == port->vectormask) {
1896 break;
1897 }
1898 if (bits & irqbits)
1899 continue;
1900 info = port + i;
1901
1902 // following add by Victor Yu. 09-13-2002
1903 iir = inb(info->base + UART_IIR);
1904 if (iir & UART_IIR_NO_INT)
1905 continue;
1906 iir &= MOXA_MUST_IIR_MASK;
1907 if (!info->tty) {
1908 status = inb(info->base + UART_LSR);
1909 outb(0x27, info->base + UART_FCR);
1910 inb(info->base + UART_MSR);
1911 continue;
1912 }
1913 // above add by Victor Yu. 09-13-2002
1914 /*
1915 if ( info->tty->flip.count < TTY_FLIPBUF_SIZE/4 ){
1916 info->IER |= MOXA_MUST_RECV_ISR;
1917 outb(info->IER, info->base + UART_IER);
1918 }
1919 */
1920
1921
1922 /* mask by Victor Yu. 09-13-2002
1923 if ( !info->tty ||
1924 (inb(info->base + UART_IIR) & UART_IIR_NO_INT) )
1925 continue;
1926 */
1927 /* mask by Victor Yu. 09-02-2002
1928 status = inb(info->base + UART_LSR) & info->read_status_mask;
1929 */
1930
1931 // following add by Victor Yu. 09-02-2002
1932 status = inb(info->base + UART_LSR);
1933
1934 if (status & UART_LSR_PE) {
1935 info->err_shadow |= NPPI_NOTIFY_PARITY;
1936 }
1937 if (status & UART_LSR_FE) {
1938 info->err_shadow |= NPPI_NOTIFY_FRAMING;
1939 }
1940 if (status & UART_LSR_OE) {
1941 info->err_shadow |= NPPI_NOTIFY_HW_OVERRUN;
1942 }
1943 if (status & UART_LSR_BI)
1944 info->err_shadow |= NPPI_NOTIFY_BREAK;
1945
1946 if (info->IsMoxaMustChipFlag) {
1947 /*
1948 if ( (status & 0x02) && !(status & 0x01) ) {
1949 outb(info->base+UART_FCR, 0x23);
1950 continue;
1951 }
1952 */
1953 if (iir == MOXA_MUST_IIR_GDA || iir == MOXA_MUST_IIR_RDA || iir == MOXA_MUST_IIR_RTO || iir == MOXA_MUST_IIR_LSR)
1954 mxser_receive_chars(info, &status);
1955
1956 } else {
1957 // above add by Victor Yu. 09-02-2002
1958
1959 status &= info->read_status_mask;
1960 if (status & UART_LSR_DR)
1961 mxser_receive_chars(info, &status);
1962 }
1963 msr = inb(info->base + UART_MSR);
1964 if (msr & UART_MSR_ANY_DELTA) {
1965 mxser_check_modem_status(info, msr);
1966 }
1967 // following add by Victor Yu. 09-13-2002
1968 if (info->IsMoxaMustChipFlag) {
1969 if ((iir == 0x02) && (status & UART_LSR_THRE)) {
1970 mxser_transmit_chars(info);
1971 }
1972 } else {
1973 // above add by Victor Yu. 09-13-2002
1974
1975 if (status & UART_LSR_THRE) {
1976 /* 8-2-99 by William
1977 if ( info->x_char || (info->xmit_cnt > 0) )
1978 */
1979 mxser_transmit_chars(info);
1980 }
1981 }
1982 }
1983 if (pass_counter++ > MXSER_ISR_PASS_LIMIT) {
1984 break; /* Prevent infinite loops */
1985 }
1986 }
1987
1988 irq_stop:
1989 //spin_unlock(&gm_lock);
1990 return handled;
1991 }
1992
1993 static void mxser_receive_chars(struct mxser_struct *info, int *status)
1994 {
1995 struct tty_struct *tty = info->tty;
1996 unsigned char ch, gdl;
1997 int ignored = 0;
1998 int cnt = 0;
1999 unsigned char *cp;
2000 char *fp;
2001 int count;
2002 int recv_room;
2003 int max = 256;
2004 unsigned long flags;
2005
2006 spin_lock_irqsave(&info->slock, flags);
2007
2008 recv_room = tty->ldisc.receive_room(tty);
2009 if ((recv_room == 0) && (!info->ldisc_stop_rx)) {
2010 //mxser_throttle(tty);
2011 mxser_stoprx(tty);
2012 //return;
2013 }
2014
2015 cp = tty->flip.char_buf;
2016 fp = tty->flip.flag_buf;
2017 count = 0;
2018
2019 // following add by Victor Yu. 09-02-2002
2020 if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
2021
2022 if (*status & UART_LSR_SPECIAL) {
2023 goto intr_old;
2024 }
2025 // following add by Victor Yu. 02-11-2004
2026 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID && (*status & MOXA_MUST_LSR_RERR))
2027 goto intr_old;
2028 // above add by Victor Yu. 02-14-2004
2029 if (*status & MOXA_MUST_LSR_RERR)
2030 goto intr_old;
2031
2032 gdl = inb(info->base + MOXA_MUST_GDL_REGISTER);
2033
2034 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU150_HWID) // add by Victor Yu. 02-11-2004
2035 gdl &= MOXA_MUST_GDL_MASK;
2036 if (gdl >= recv_room) {
2037 if (!info->ldisc_stop_rx) {
2038 //mxser_throttle(tty);
2039 mxser_stoprx(tty);
2040 }
2041 //return;
2042 }
2043 while (gdl--) {
2044 ch = inb(info->base + UART_RX);
2045 count++;
2046 *cp++ = ch;
2047 *fp++ = 0;
2048 cnt++;
2049 /*
2050 if((count>=HI_WATER) && (info->stop_rx==0)){
2051 mxser_stoprx(tty);
2052 info->stop_rx=1;
2053 break;
2054 } */
2055 }
2056 goto end_intr;
2057 }
2058 intr_old:
2059 // above add by Victor Yu. 09-02-2002
2060
2061 do {
2062 if (max-- < 0)
2063 break;
2064 /*
2065 if((count>=HI_WATER) && (info->stop_rx==0)){
2066 mxser_stoprx(tty);
2067 info->stop_rx=1;
2068 break;
2069 }
2070 */
2071
2072 ch = inb(info->base + UART_RX);
2073 // following add by Victor Yu. 09-02-2002
2074 if (info->IsMoxaMustChipFlag && (*status & UART_LSR_OE) /*&& !(*status&UART_LSR_DR) */ )
2075 outb(0x23, info->base + UART_FCR);
2076 *status &= info->read_status_mask;
2077 // above add by Victor Yu. 09-02-2002
2078 if (*status & info->ignore_status_mask) {
2079 if (++ignored > 100)
2080 break;
2081 } else {
2082 count++;
2083 if (*status & UART_LSR_SPECIAL) {
2084 if (*status & UART_LSR_BI) {
2085 *fp++ = TTY_BREAK;
2086 /* added by casper 1/11/2000 */
2087 info->icount.brk++;
2088
2089 /* */
2090 if (info->flags & ASYNC_SAK)
2091 do_SAK(tty);
2092 } else if (*status & UART_LSR_PE) {
2093 *fp++ = TTY_PARITY;
2094 /* added by casper 1/11/2000 */
2095 info->icount.parity++;
2096 /* */
2097 } else if (*status & UART_LSR_FE) {
2098 *fp++ = TTY_FRAME;
2099 /* added by casper 1/11/2000 */
2100 info->icount.frame++;
2101 /* */
2102 } else if (*status & UART_LSR_OE) {
2103 *fp++ = TTY_OVERRUN;
2104 /* added by casper 1/11/2000 */
2105 info->icount.overrun++;
2106 /* */
2107 } else
2108 *fp++ = 0;
2109 } else
2110 *fp++ = 0;
2111 *cp++ = ch;
2112 cnt++;
2113 if (cnt >= recv_room) {
2114 if (!info->ldisc_stop_rx) {
2115 //mxser_throttle(tty);
2116 mxser_stoprx(tty);
2117 }
2118 break;
2119 }
2120
2121 }
2122
2123 // following add by Victor Yu. 09-02-2002
2124 if (info->IsMoxaMustChipFlag)
2125 break;
2126 // above add by Victor Yu. 09-02-2002
2127
2128 /* mask by Victor Yu. 09-02-2002
2129 *status = inb(info->base + UART_LSR) & info->read_status_mask;
2130 */
2131 // following add by Victor Yu. 09-02-2002
2132 *status = inb(info->base + UART_LSR);
2133 // above add by Victor Yu. 09-02-2002
2134 } while (*status & UART_LSR_DR);
2135
2136 end_intr: // add by Victor Yu. 09-02-2002
2137
2138 mxvar_log.rxcnt[info->port] += cnt;
2139 info->mon_data.rxcnt += cnt;
2140 info->mon_data.up_rxcnt += cnt;
2141 spin_unlock_irqrestore(&info->slock, flags);
2142
2143 tty_flip_buffer_push(tty);
2144 }
2145
2146 static void mxser_transmit_chars(struct mxser_struct *info)
2147 {
2148 int count, cnt;
2149 unsigned long flags;
2150
2151 spin_lock_irqsave(&info->slock, flags);
2152
2153 if (info->x_char) {
2154 outb(info->x_char, info->base + UART_TX);
2155 info->x_char = 0;
2156 mxvar_log.txcnt[info->port]++;
2157 info->mon_data.txcnt++;
2158 info->mon_data.up_txcnt++;
2159
2160 /* added by casper 1/11/2000 */
2161 info->icount.tx++;
2162 /* */
2163 spin_unlock_irqrestore(&info->slock, flags);
2164 return;
2165 }
2166
2167 if (info->xmit_buf == 0) {
2168 spin_unlock_irqrestore(&info->slock, flags);
2169 return;
2170 }
2171
2172 if ((info->xmit_cnt <= 0) || info->tty->stopped || (info->tty->hw_stopped && (info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag))) {
2173 info->IER &= ~UART_IER_THRI;
2174 outb(info->IER, info->base + UART_IER);
2175 spin_unlock_irqrestore(&info->slock, flags);
2176 return;
2177 }
2178
2179 cnt = info->xmit_cnt;
2180 count = info->xmit_fifo_size;
2181 do {
2182 outb(info->xmit_buf[info->xmit_tail++], info->base + UART_TX);
2183 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2184 if (--info->xmit_cnt <= 0)
2185 break;
2186 } while (--count > 0);
2187 mxvar_log.txcnt[info->port] += (cnt - info->xmit_cnt);
2188
2189 // added by James 03-12-2004.
2190 info->mon_data.txcnt += (cnt - info->xmit_cnt);
2191 info->mon_data.up_txcnt += (cnt - info->xmit_cnt);
2192 // (above) added by James.
2193
2194 /* added by casper 1/11/2000 */
2195 info->icount.tx += (cnt - info->xmit_cnt);
2196 /* */
2197
2198 if (info->xmit_cnt < WAKEUP_CHARS) {
2199 set_bit(MXSER_EVENT_TXLOW, &info->event);
2200 schedule_work(&info->tqueue);
2201 }
2202 if (info->xmit_cnt <= 0) {
2203 info->IER &= ~UART_IER_THRI;
2204 outb(info->IER, info->base + UART_IER);
2205 }
2206 spin_unlock_irqrestore(&info->slock, flags);
2207 }
2208
2209 static void mxser_check_modem_status(struct mxser_struct *info, int status)
2210 {
2211 /* update input line counters */
2212 if (status & UART_MSR_TERI)
2213 info->icount.rng++;
2214 if (status & UART_MSR_DDSR)
2215 info->icount.dsr++;
2216 if (status & UART_MSR_DDCD)
2217 info->icount.dcd++;
2218 if (status & UART_MSR_DCTS)
2219 info->icount.cts++;
2220 info->mon_data.modem_status = status;
2221 wake_up_interruptible(&info->delta_msr_wait);
2222
2223
2224 if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
2225 if (status & UART_MSR_DCD)
2226 wake_up_interruptible(&info->open_wait);
2227 schedule_work(&info->tqueue);
2228 }
2229
2230 if (info->flags & ASYNC_CTS_FLOW) {
2231 if (info->tty->hw_stopped) {
2232 if (status & UART_MSR_CTS) {
2233 info->tty->hw_stopped = 0;
2234
2235 if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2236 info->IER |= UART_IER_THRI;
2237 outb(info->IER, info->base + UART_IER);
2238 }
2239 set_bit(MXSER_EVENT_TXLOW, &info->event);
2240 schedule_work(&info->tqueue); }
2241 } else {
2242 if (!(status & UART_MSR_CTS)) {
2243 info->tty->hw_stopped = 1;
2244 if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2245 info->IER &= ~UART_IER_THRI;
2246 outb(info->IER, info->base + UART_IER);
2247 }
2248 }
2249 }
2250 }
2251 }
2252
2253 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, struct mxser_struct *info)
2254 {
2255 DECLARE_WAITQUEUE(wait, current);
2256 int retval;
2257 int do_clocal = 0;
2258 unsigned long flags;
2259
2260 /*
2261 * If non-blocking mode is set, or the port is not enabled,
2262 * then make the check up front and then exit.
2263 */
2264 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2265 info->flags |= ASYNC_NORMAL_ACTIVE;
2266 return (0);
2267 }
2268
2269 if (tty->termios->c_cflag & CLOCAL)
2270 do_clocal = 1;
2271
2272 /*
2273 * Block waiting for the carrier detect and the line to become
2274 * free (i.e., not in use by the callout). While we are in
2275 * this loop, info->count is dropped by one, so that
2276 * mxser_close() knows when to free things. We restore it upon
2277 * exit, either normal or abnormal.
2278 */
2279 retval = 0;
2280 add_wait_queue(&info->open_wait, &wait);
2281
2282 spin_lock_irqsave(&info->slock, flags);
2283 if (!tty_hung_up_p(filp))
2284 info->count--;
2285 spin_unlock_irqrestore(&info->slock, flags);
2286 info->blocked_open++;
2287 while (1) {
2288 spin_lock_irqsave(&info->slock, flags);
2289 outb(inb(info->base + UART_MCR) | UART_MCR_DTR | UART_MCR_RTS, info->base + UART_MCR);
2290 spin_unlock_irqrestore(&info->slock, flags);
2291 set_current_state(TASK_INTERRUPTIBLE);
2292 if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)) {
2293 if (info->flags & ASYNC_HUP_NOTIFY)
2294 retval = -EAGAIN;
2295 else
2296 retval = -ERESTARTSYS;
2297 break;
2298 }
2299 if (!(info->flags & ASYNC_CLOSING) && (do_clocal || (inb(info->base + UART_MSR) & UART_MSR_DCD)))
2300 break;
2301 if (signal_pending(current)) {
2302 retval = -ERESTARTSYS;
2303 break;
2304 }
2305 schedule();
2306 }
2307 set_current_state(TASK_RUNNING);
2308 remove_wait_queue(&info->open_wait, &wait);
2309 if (!tty_hung_up_p(filp))
2310 info->count++;
2311 info->blocked_open--;
2312 if (retval)
2313 return (retval);
2314 info->flags |= ASYNC_NORMAL_ACTIVE;
2315 return (0);
2316 }
2317
2318 static int mxser_startup(struct mxser_struct *info)
2319 {
2320
2321 unsigned long page;
2322 unsigned long flags;
2323
2324 page = __get_free_page(GFP_KERNEL);
2325 if (!page)
2326 return (-ENOMEM);
2327
2328 spin_lock_irqsave(&info->slock, flags);
2329
2330 if (info->flags & ASYNC_INITIALIZED) {
2331 free_page(page);
2332 spin_unlock_irqrestore(&info->slock, flags);
2333 return (0);
2334 }
2335
2336 if (!info->base || !info->type) {
2337 if (info->tty)
2338 set_bit(TTY_IO_ERROR, &info->tty->flags);
2339 free_page(page);
2340 spin_unlock_irqrestore(&info->slock, flags);
2341 return (0);
2342 }
2343 if (info->xmit_buf)
2344 free_page(page);
2345 else
2346 info->xmit_buf = (unsigned char *) page;
2347
2348 /*
2349 * Clear the FIFO buffers and disable them
2350 * (they will be reenabled in mxser_change_speed())
2351 */
2352 if (info->IsMoxaMustChipFlag)
2353 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2354 else
2355 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
2356
2357 /*
2358 * At this point there's no way the LSR could still be 0xFF;
2359 * if it is, then bail out, because there's likely no UART
2360 * here.
2361 */
2362 if (inb(info->base + UART_LSR) == 0xff) {
2363 spin_unlock_irqrestore(&info->slock, flags);
2364 if (capable(CAP_SYS_ADMIN)) {
2365 if (info->tty)
2366 set_bit(TTY_IO_ERROR, &info->tty->flags);
2367 return (0);
2368 } else
2369 return (-ENODEV);
2370 }
2371
2372 /*
2373 * Clear the interrupt registers.
2374 */
2375 (void) inb(info->base + UART_LSR);
2376 (void) inb(info->base + UART_RX);
2377 (void) inb(info->base + UART_IIR);
2378 (void) inb(info->base + UART_MSR);
2379
2380 /*
2381 * Now, initialize the UART
2382 */
2383 outb(UART_LCR_WLEN8, info->base + UART_LCR); /* reset DLAB */
2384 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
2385 outb(info->MCR, info->base + UART_MCR);
2386
2387 /*
2388 * Finally, enable interrupts
2389 */
2390 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
2391 // info->IER = UART_IER_RLSI | UART_IER_RDI;
2392
2393 // following add by Victor Yu. 08-30-2002
2394 if (info->IsMoxaMustChipFlag)
2395 info->IER |= MOXA_MUST_IER_EGDAI;
2396 // above add by Victor Yu. 08-30-2002
2397 outb(info->IER, info->base + UART_IER); /* enable interrupts */
2398
2399 /*
2400 * And clear the interrupt registers again for luck.
2401 */
2402 (void) inb(info->base + UART_LSR);
2403 (void) inb(info->base + UART_RX);
2404 (void) inb(info->base + UART_IIR);
2405 (void) inb(info->base + UART_MSR);
2406
2407 if (info->tty)
2408 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2409 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2410
2411 /*
2412 * and set the speed of the serial port
2413 */
2414 spin_unlock_irqrestore(&info->slock, flags);
2415 mxser_change_speed(info, NULL);
2416
2417 info->flags |= ASYNC_INITIALIZED;
2418 return (0);
2419 }
2420
2421 /*
2422 * This routine will shutdown a serial port; interrupts maybe disabled, and
2423 * DTR is dropped if the hangup on close termio flag is on.
2424 */
2425 static void mxser_shutdown(struct mxser_struct *info)
2426 {
2427 unsigned long flags;
2428
2429 if (!(info->flags & ASYNC_INITIALIZED))
2430 return;
2431
2432 spin_lock_irqsave(&info->slock, flags);
2433
2434 /*
2435 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
2436 * here so the queue might never be waken up
2437 */
2438 wake_up_interruptible(&info->delta_msr_wait);
2439
2440 /*
2441 * Free the IRQ, if necessary
2442 */
2443 if (info->xmit_buf) {
2444 free_page((unsigned long) info->xmit_buf);
2445 info->xmit_buf = NULL;
2446 }
2447
2448 info->IER = 0;
2449 outb(0x00, info->base + UART_IER);
2450
2451 if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
2452 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
2453 outb(info->MCR, info->base + UART_MCR);
2454
2455 /* clear Rx/Tx FIFO's */
2456 // following add by Victor Yu. 08-30-2002
2457 if (info->IsMoxaMustChipFlag)
2458 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2459 else
2460 // above add by Victor Yu. 08-30-2002
2461 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
2462
2463 /* read data port to reset things */
2464 (void) inb(info->base + UART_RX);
2465
2466 if (info->tty)
2467 set_bit(TTY_IO_ERROR, &info->tty->flags);
2468
2469 info->flags &= ~ASYNC_INITIALIZED;
2470
2471 // following add by Victor Yu. 09-23-2002
2472 if (info->IsMoxaMustChipFlag) {
2473 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->base);
2474 }
2475 // above add by Victor Yu. 09-23-2002
2476
2477 spin_unlock_irqrestore(&info->slock, flags);
2478 }
2479
2480 /*
2481 * This routine is called to set the UART divisor registers to match
2482 * the specified baud rate for a serial port.
2483 */
2484 static int mxser_change_speed(struct mxser_struct *info, struct termios *old_termios)
2485 {
2486 unsigned cflag, cval, fcr;
2487 int ret = 0;
2488 unsigned char status;
2489 long baud;
2490 unsigned long flags;
2491
2492
2493 if (!info->tty || !info->tty->termios)
2494 return ret;
2495 cflag = info->tty->termios->c_cflag;
2496 if (!(info->base))
2497 return ret;
2498
2499
2500 #ifndef B921600
2501 #define B921600 (B460800 +1)
2502 #endif
2503 if (mxser_set_baud_method[info->port] == 0) {
2504 switch (cflag & (CBAUD | CBAUDEX)) {
2505 case B921600:
2506 baud = 921600;
2507 break;
2508 case B460800:
2509 baud = 460800;
2510 break;
2511 case B230400:
2512 baud = 230400;
2513 break;
2514 case B115200:
2515 baud = 115200;
2516 break;
2517 case B57600:
2518 baud = 57600;
2519 break;
2520 case B38400:
2521 baud = 38400;
2522 break;
2523 case B19200:
2524 baud = 19200;
2525 break;
2526 case B9600:
2527 baud = 9600;
2528 break;
2529 case B4800:
2530 baud = 4800;
2531 break;
2532 case B2400:
2533 baud = 2400;
2534 break;
2535 case B1800:
2536 baud = 1800;
2537 break;
2538 case B1200:
2539 baud = 1200;
2540 break;
2541 case B600:
2542 baud = 600;
2543 break;
2544 case B300:
2545 baud = 300;
2546 break;
2547 case B200:
2548 baud = 200;
2549 break;
2550 case B150:
2551 baud = 150;
2552 break;
2553 case B134:
2554 baud = 134;
2555 break;
2556 case B110:
2557 baud = 110;
2558 break;
2559 case B75:
2560 baud = 75;
2561 break;
2562 case B50:
2563 baud = 50;
2564 break;
2565 default:
2566 baud = 0;
2567 break;
2568 }
2569 mxser_set_baud(info, baud);
2570 }
2571
2572 /* byte size and parity */
2573 switch (cflag & CSIZE) {
2574 case CS5:
2575 cval = 0x00;
2576 break;
2577 case CS6:
2578 cval = 0x01;
2579 break;
2580 case CS7:
2581 cval = 0x02;
2582 break;
2583 case CS8:
2584 cval = 0x03;
2585 break;
2586 default:
2587 cval = 0x00;
2588 break; /* too keep GCC shut... */
2589 }
2590 if (cflag & CSTOPB)
2591 cval |= 0x04;
2592 if (cflag & PARENB)
2593 cval |= UART_LCR_PARITY;
2594 if (!(cflag & PARODD)) {
2595 cval |= UART_LCR_EPAR;
2596 }
2597 if (cflag & CMSPAR)
2598 cval |= UART_LCR_SPAR;
2599
2600 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
2601 if (info->IsMoxaMustChipFlag) {
2602 fcr = UART_FCR_ENABLE_FIFO;
2603 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2604 SET_MOXA_MUST_FIFO_VALUE(info);
2605 } else
2606 fcr = 0;
2607 } else {
2608 fcr = UART_FCR_ENABLE_FIFO;
2609 // following add by Victor Yu. 08-30-2002
2610 if (info->IsMoxaMustChipFlag) {
2611 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2612 SET_MOXA_MUST_FIFO_VALUE(info);
2613 } else {
2614 // above add by Victor Yu. 08-30-2002
2615
2616 switch (info->rx_trigger) {
2617 case 1:
2618 fcr |= UART_FCR_TRIGGER_1;
2619 break;
2620 case 4:
2621 fcr |= UART_FCR_TRIGGER_4;
2622 break;
2623 case 8:
2624 fcr |= UART_FCR_TRIGGER_8;
2625 break;
2626 default:
2627 fcr |= UART_FCR_TRIGGER_14;
2628 break;
2629 }
2630 }
2631 }
2632
2633 /* CTS flow control flag and modem status interrupts */
2634 info->IER &= ~UART_IER_MSI;
2635 info->MCR &= ~UART_MCR_AFE;
2636 if (cflag & CRTSCTS) {
2637 info->flags |= ASYNC_CTS_FLOW;
2638 info->IER |= UART_IER_MSI;
2639 if ((info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
2640 info->MCR |= UART_MCR_AFE;
2641 //status = mxser_get_msr(info->base, 0, info->port);
2642 /* save_flags(flags);
2643 cli();
2644 status = inb(baseaddr + UART_MSR);
2645 restore_flags(flags);*/
2646 //mxser_check_modem_status(info, status);
2647 } else {
2648 //status = mxser_get_msr(info->base, 0, info->port);
2649
2650 //MX_LOCK(&info->slock);
2651 status = inb(info->base + UART_MSR);
2652 //MX_UNLOCK(&info->slock);
2653 if (info->tty->hw_stopped) {
2654 if (status & UART_MSR_CTS) {
2655 info->tty->hw_stopped = 0;
2656 if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2657 info->IER |= UART_IER_THRI;
2658 outb(info->IER, info->base + UART_IER);
2659 }
2660 set_bit(MXSER_EVENT_TXLOW, &info->event);
2661 schedule_work(&info->tqueue); }
2662 } else {
2663 if (!(status & UART_MSR_CTS)) {
2664 info->tty->hw_stopped = 1;
2665 if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2666 info->IER &= ~UART_IER_THRI;
2667 outb(info->IER, info->base + UART_IER);
2668 }
2669 }
2670 }
2671 }
2672 } else {
2673 info->flags &= ~ASYNC_CTS_FLOW;
2674 }
2675 outb(info->MCR, info->base + UART_MCR);
2676 if (cflag & CLOCAL) {
2677 info->flags &= ~ASYNC_CHECK_CD;
2678 } else {
2679 info->flags |= ASYNC_CHECK_CD;
2680 info->IER |= UART_IER_MSI;
2681 }
2682 outb(info->IER, info->base + UART_IER);
2683
2684 /*
2685 * Set up parity check flag
2686 */
2687 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
2688 if (I_INPCK(info->tty))
2689 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
2690 if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
2691 info->read_status_mask |= UART_LSR_BI;
2692
2693 info->ignore_status_mask = 0;
2694
2695 if (I_IGNBRK(info->tty)) {
2696 info->ignore_status_mask |= UART_LSR_BI;
2697 info->read_status_mask |= UART_LSR_BI;
2698 /*
2699 * If we're ignore parity and break indicators, ignore
2700 * overruns too. (For real raw support).
2701 */
2702 if (I_IGNPAR(info->tty)) {
2703 info->ignore_status_mask |= UART_LSR_OE | UART_LSR_PE | UART_LSR_FE;
2704 info->read_status_mask |= UART_LSR_OE | UART_LSR_PE | UART_LSR_FE;
2705 }
2706 }
2707 // following add by Victor Yu. 09-02-2002
2708 if (info->IsMoxaMustChipFlag) {
2709 spin_lock_irqsave(&info->slock, flags);
2710 SET_MOXA_MUST_XON1_VALUE(info->base, START_CHAR(info->tty));
2711 SET_MOXA_MUST_XOFF1_VALUE(info->base, STOP_CHAR(info->tty));
2712 if (I_IXON(info->tty)) {
2713 ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2714 } else {
2715 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2716 }
2717 if (I_IXOFF(info->tty)) {
2718 ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2719 } else {
2720 DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2721 }
2722 /*
2723 if ( I_IXANY(info->tty) ) {
2724 info->MCR |= MOXA_MUST_MCR_XON_ANY;
2725 ENABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2726 } else {
2727 info->MCR &= ~MOXA_MUST_MCR_XON_ANY;
2728 DISABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2729 }
2730 */
2731 spin_unlock_irqrestore(&info->slock, flags);
2732 }
2733 // above add by Victor Yu. 09-02-2002
2734
2735
2736 outb(fcr, info->base + UART_FCR); /* set fcr */
2737 outb(cval, info->base + UART_LCR);
2738
2739 return ret;
2740 }
2741
2742
2743 static int mxser_set_baud(struct mxser_struct *info, long newspd)
2744 {
2745 int quot = 0;
2746 unsigned char cval;
2747 int ret = 0;
2748 unsigned long flags;
2749
2750 if (!info->tty || !info->tty->termios)
2751 return ret;
2752
2753 if (!(info->base))
2754 return ret;
2755
2756 if (newspd > info->MaxCanSetBaudRate)
2757 return 0;
2758
2759 info->realbaud = newspd;
2760 if (newspd == 134) {
2761 quot = (2 * info->baud_base / 269);
2762 } else if (newspd) {
2763 quot = info->baud_base / newspd;
2764
2765 if (quot == 0)
2766 quot = 1;
2767
2768 } else {
2769 quot = 0;
2770 }
2771
2772 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
2773 info->timeout += HZ / 50; /* Add .02 seconds of slop */
2774
2775 if (quot) {
2776 spin_lock_irqsave(&info->slock, flags);
2777 info->MCR |= UART_MCR_DTR;
2778 outb(info->MCR, info->base + UART_MCR);
2779 spin_unlock_irqrestore(&info->slock, flags);
2780 } else {
2781 spin_lock_irqsave(&info->slock, flags);
2782 info->MCR &= ~UART_MCR_DTR;
2783 outb(info->MCR, info->base + UART_MCR);
2784 spin_unlock_irqrestore(&info->slock, flags);
2785 return ret;
2786 }
2787
2788 cval = inb(info->base + UART_LCR);
2789
2790 outb(cval | UART_LCR_DLAB, info->base + UART_LCR); /* set DLAB */
2791
2792 outb(quot & 0xff, info->base + UART_DLL); /* LS of divisor */
2793 outb(quot >> 8, info->base + UART_DLM); /* MS of divisor */
2794 outb(cval, info->base + UART_LCR); /* reset DLAB */
2795
2796
2797 return ret;
2798 }
2799
2800
2801
2802 /*
2803 * ------------------------------------------------------------
2804 * friends of mxser_ioctl()
2805 * ------------------------------------------------------------
2806 */
2807 static int mxser_get_serial_info(struct mxser_struct *info, struct serial_struct __user *retinfo)
2808 {
2809 struct serial_struct tmp;
2810
2811 if (!retinfo)
2812 return (-EFAULT);
2813 memset(&tmp, 0, sizeof(tmp));
2814 tmp.type = info->type;
2815 tmp.line = info->port;
2816 tmp.port = info->base;
2817 tmp.irq = info->irq;
2818 tmp.flags = info->flags;
2819 tmp.baud_base = info->baud_base;
2820 tmp.close_delay = info->close_delay;
2821 tmp.closing_wait = info->closing_wait;
2822 tmp.custom_divisor = info->custom_divisor;
2823 tmp.hub6 = 0;
2824 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2825 return -EFAULT;
2826 return (0);
2827 }
2828
2829 static int mxser_set_serial_info(struct mxser_struct *info, struct serial_struct __user *new_info)
2830 {
2831 struct serial_struct new_serial;
2832 unsigned int flags;
2833 int retval = 0;
2834
2835 if (!new_info || !info->base)
2836 return (-EFAULT);
2837 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2838 return -EFAULT;
2839
2840 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))
2841 return (-EPERM);
2842
2843 flags = info->flags & ASYNC_SPD_MASK;
2844
2845 if (!capable(CAP_SYS_ADMIN)) {
2846 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)))
2847 return (-EPERM);
2848 info->flags = ((info->flags & ~ASYNC_USR_MASK) | (new_serial.flags & ASYNC_USR_MASK));
2849 } else {
2850 /*
2851 * OK, past this point, all the error checking has been done.
2852 * At this point, we start making changes.....
2853 */
2854 info->flags = ((info->flags & ~ASYNC_FLAGS) | (new_serial.flags & ASYNC_FLAGS));
2855 info->close_delay = new_serial.close_delay * HZ / 100;
2856 info->closing_wait = new_serial.closing_wait * HZ / 100;
2857 info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2858 info->tty->low_latency = 0; //(info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2859 }
2860
2861 /* added by casper, 3/17/2000, for mouse */
2862 info->type = new_serial.type;
2863
2864 process_txrx_fifo(info);
2865
2866 /* */
2867 if (info->flags & ASYNC_INITIALIZED) {
2868 if (flags != (info->flags & ASYNC_SPD_MASK)) {
2869 mxser_change_speed(info, NULL);
2870 }
2871 } else {
2872 retval = mxser_startup(info);
2873 }
2874 return (retval);
2875 }
2876
2877 /*
2878 * mxser_get_lsr_info - get line status register info
2879 *
2880 * Purpose: Let user call ioctl() to get info when the UART physically
2881 * is emptied. On bus types like RS485, the transmitter must
2882 * release the bus after transmitting. This must be done when
2883 * the transmit shift register is empty, not be done when the
2884 * transmit holding register is empty. This functionality
2885 * allows an RS485 driver to be written in user space.
2886 */
2887 static int mxser_get_lsr_info(struct mxser_struct *info, unsigned int __user *value)
2888 {
2889 unsigned char status;
2890 unsigned int result;
2891 unsigned long flags;
2892
2893 spin_lock_irqsave(&info->slock, flags);
2894 status = inb(info->base + UART_LSR);
2895 spin_unlock_irqrestore(&info->slock, flags);
2896 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
2897 return put_user(result, value);
2898 }
2899
2900 /*
2901 * This routine sends a break character out the serial port.
2902 */
2903 static void mxser_send_break(struct mxser_struct *info, int duration)
2904 {
2905 unsigned long flags;
2906
2907 if (!info->base)
2908 return;
2909 set_current_state(TASK_INTERRUPTIBLE);
2910 spin_lock_irqsave(&info->slock, flags);
2911 outb(inb(info->base + UART_LCR) | UART_LCR_SBC, info->base + UART_LCR);
2912 spin_unlock_irqrestore(&info->slock, flags);
2913 schedule_timeout(duration);
2914 spin_lock_irqsave(&info->slock, flags);
2915 outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC, info->base + UART_LCR);
2916 spin_unlock_irqrestore(&info->slock, flags);
2917 }
2918
2919 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
2920 {
2921 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
2922 unsigned char control, status;
2923 unsigned long flags;
2924
2925
2926 if (tty->index == MXSER_PORTS)
2927 return (-ENOIOCTLCMD);
2928 if (tty->flags & (1 << TTY_IO_ERROR))
2929 return (-EIO);
2930
2931 control = info->MCR;
2932
2933 spin_lock_irqsave(&info->slock, flags);
2934 status = inb(info->base + UART_MSR);
2935 if (status & UART_MSR_ANY_DELTA)
2936 mxser_check_modem_status(info, status);
2937 spin_unlock_irqrestore(&info->slock, flags);
2938 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
2939 ((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);
2940 }
2941
2942 static int mxser_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear)
2943 {
2944 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
2945 unsigned long flags;
2946
2947
2948 if (tty->index == MXSER_PORTS)
2949 return -ENOIOCTLCMD;
2950 if (tty->flags & (1 << TTY_IO_ERROR))
2951 return -EIO;
2952
2953 spin_lock_irqsave(&info->slock, flags);
2954
2955 if (set & TIOCM_RTS)
2956 info->MCR |= UART_MCR_RTS;
2957 if (set & TIOCM_DTR)
2958 info->MCR |= UART_MCR_DTR;
2959
2960 if (clear & TIOCM_RTS)
2961 info->MCR &= ~UART_MCR_RTS;
2962 if (clear & TIOCM_DTR)
2963 info->MCR &= ~UART_MCR_DTR;
2964
2965 outb(info->MCR, info->base + UART_MCR);
2966 spin_unlock_irqrestore(&info->slock, flags);
2967 return 0;
2968 }
2969
2970
2971 static int mxser_read_register(int, unsigned short *);
2972 static int mxser_program_mode(int);
2973 static void mxser_normal_mode(int);
2974
2975 static int mxser_get_ISA_conf(int cap, struct mxser_hwconf *hwconf)
2976 {
2977 int id, i, bits;
2978 unsigned short regs[16], irq;
2979 unsigned char scratch, scratch2;
2980
2981 hwconf->IsMoxaMustChipFlag = MOXA_OTHER_UART;
2982
2983 id = mxser_read_register(cap, regs);
2984 if (id == C168_ASIC_ID) {
2985 hwconf->board_type = MXSER_BOARD_C168_ISA;
2986 hwconf->ports = 8;
2987 } else if (id == C104_ASIC_ID) {
2988 hwconf->board_type = MXSER_BOARD_C104_ISA;
2989 hwconf->ports = 4;
2990 } else if (id == C102_ASIC_ID) {
2991 hwconf->board_type = MXSER_BOARD_C102_ISA;
2992 hwconf->ports = 2;
2993 } else if (id == CI132_ASIC_ID) {
2994 hwconf->board_type = MXSER_BOARD_CI132;
2995 hwconf->ports = 2;
2996 } else if (id == CI134_ASIC_ID) {
2997 hwconf->board_type = MXSER_BOARD_CI134;
2998 hwconf->ports = 4;
2999 } else if (id == CI104J_ASIC_ID) {
3000 hwconf->board_type = MXSER_BOARD_CI104J;
3001 hwconf->ports = 4;
3002 } else
3003 return (0);
3004
3005 irq = 0;
3006 if (hwconf->ports == 2) {
3007 irq = regs[9] & 0xF000;
3008 irq = irq | (irq >> 4);
3009 if (irq != (regs[9] & 0xFF00))
3010 return (MXSER_ERR_IRQ_CONFLIT);
3011 } else if (hwconf->ports == 4) {
3012 irq = regs[9] & 0xF000;
3013 irq = irq | (irq >> 4);
3014 irq = irq | (irq >> 8);
3015 if (irq != regs[9])
3016 return (MXSER_ERR_IRQ_CONFLIT);
3017 } else if (hwconf->ports == 8) {
3018 irq = regs[9] & 0xF000;
3019 irq = irq | (irq >> 4);
3020 irq = irq | (irq >> 8);
3021 if ((irq != regs[9]) || (irq != regs[10]))
3022 return (MXSER_ERR_IRQ_CONFLIT);
3023 }
3024
3025 if (!irq) {
3026 return (MXSER_ERR_IRQ);
3027 }
3028 hwconf->irq = ((int) (irq & 0xF000) >> 12);
3029 for (i = 0; i < 8; i++)
3030 hwconf->ioaddr[i] = (int) regs[i + 1] & 0xFFF8;
3031 if ((regs[12] & 0x80) == 0) {
3032 return (MXSER_ERR_VECTOR);
3033 }
3034 hwconf->vector = (int) regs[11]; /* interrupt vector */
3035 if (id == 1)
3036 hwconf->vector_mask = 0x00FF;
3037 else
3038 hwconf->vector_mask = 0x000F;
3039 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
3040 if (regs[12] & bits) {
3041 hwconf->baud_base[i] = 921600;
3042 hwconf->MaxCanSetBaudRate[i] = 921600; // add by Victor Yu. 09-04-2002
3043 } else {
3044 hwconf->baud_base[i] = 115200;
3045 hwconf->MaxCanSetBaudRate[i] = 115200; // add by Victor Yu. 09-04-2002
3046 }
3047 }
3048 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
3049 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
3050 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
3051 outb(scratch2, cap + UART_LCR);
3052 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
3053 scratch = inb(cap + UART_IIR);
3054
3055 if (scratch & 0xC0)
3056 hwconf->uart_type = PORT_16550A;
3057 else
3058 hwconf->uart_type = PORT_16450;
3059 if (id == 1)
3060 hwconf->ports = 8;
3061 else
3062 hwconf->ports = 4;
3063 request_region(hwconf->ioaddr[0], 8 * hwconf->ports, "mxser(IO)");
3064 request_region(hwconf->vector, 1, "mxser(vector)");
3065 return (hwconf->ports);
3066 }
3067
3068 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
3069 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
3070 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
3071 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
3072 #define EN_CCMD 0x000 /* Chip's command register */
3073 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
3074 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
3075 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
3076 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
3077 #define EN0_DCFG 0x00E /* Data configuration reg WR */
3078 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
3079 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
3080 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
3081 static int mxser_read_register(int port, unsigned short *regs)
3082 {
3083 int i, k, value, id;
3084 unsigned int j;
3085
3086 id = mxser_program_mode(port);
3087 if (id < 0)
3088 return (id);
3089 for (i = 0; i < 14; i++) {
3090 k = (i & 0x3F) | 0x180;
3091 for (j = 0x100; j > 0; j >>= 1) {
3092 outb(CHIP_CS, port);
3093 if (k & j) {
3094 outb(CHIP_CS | CHIP_DO, port);
3095 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
3096 } else {
3097 outb(CHIP_CS, port);
3098 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
3099 }
3100 }
3101 (void) inb(port);
3102 value = 0;
3103 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
3104 outb(CHIP_CS, port);
3105 outb(CHIP_CS | CHIP_SK, port);
3106 if (inb(port) & CHIP_DI)
3107 value |= j;
3108 }
3109 regs[i] = value;
3110 outb(0, port);
3111 }
3112 mxser_normal_mode(port);
3113 return (id);
3114 }
3115
3116 static int mxser_program_mode(int port)
3117 {
3118 int id, i, j, n;
3119 //unsigned long flags;
3120
3121 spin_lock(&gm_lock);
3122 outb(0, port);
3123 outb(0, port);
3124 outb(0, port);
3125 (void) inb(port);
3126 (void) inb(port);
3127 outb(0, port);
3128 (void) inb(port);
3129 //restore_flags(flags);
3130 spin_unlock(&gm_lock);
3131
3132 id = inb(port + 1) & 0x1F;
3133 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))
3134 return (-1);
3135 for (i = 0, j = 0; i < 4; i++) {
3136 n = inb(port + 2);
3137 if (n == 'M') {
3138 j = 1;
3139 } else if ((j == 1) && (n == 1)) {
3140 j = 2;
3141 break;
3142 } else
3143 j = 0;
3144 }
3145 if (j != 2)
3146 id = -2;
3147 return (id);
3148 }
3149
3150 static void mxser_normal_mode(int port)
3151 {
3152 int i, n;
3153
3154 outb(0xA5, port + 1);
3155 outb(0x80, port + 3);
3156 outb(12, port + 0); /* 9600 bps */
3157 outb(0, port + 1);
3158 outb(0x03, port + 3); /* 8 data bits */
3159 outb(0x13, port + 4); /* loop back mode */
3160 for (i = 0; i < 16; i++) {
3161 n = inb(port + 5);
3162 if ((n & 0x61) == 0x60)
3163 break;
3164 if ((n & 1) == 1)
3165 (void) inb(port);
3166 }
3167 outb(0x00, port + 4);
3168 }
3169
3170 // added by James 03-05-2004.
3171 // for secure device server:
3172 // stat = 1, the port8 DTR is set to ON.
3173 // stat = 0, the port8 DTR is set to OFF.
3174 void SDS_PORT8_DTR(int stat)
3175 {
3176 int _sds_oldmcr;
3177 _sds_oldmcr = inb(mxvar_table[7].base + UART_MCR); // get old MCR
3178 if (stat == 1) {
3179 outb(_sds_oldmcr | 0x01, mxvar_table[7].base + UART_MCR); // set DTR ON
3180 }
3181 if (stat == 0) {
3182 outb(_sds_oldmcr & 0xfe, mxvar_table[7].base + UART_MCR); // set DTR OFF
3183 }
3184 return;
3185 }
3186
3187 module_init(mxser_module_init);
3188 module_exit(mxser_module_exit);
3189
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