]> git.proxmox.com Git - mirror_ubuntu-artful-kernel.git/blob - drivers/char/mxser.c
projects / mirror_ubuntu-artful-kernel.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
merge linus into release branch
[mirror_ubuntu-artful-kernel.git] / drivers / char / mxser.c
1 /*
2 * mxser.c -- MOXA Smartio/Industio family multiport serial driver.
3 *
4 * Copyright (C) 1999-2001 Moxa Technologies (support@moxa.com.tw).
5 *
6 * This code is loosely based on the Linux serial driver, written by
7 * Linus Torvalds, Theodore T'so and others.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *
23 * Original release 10/26/00
24 *
25 * 02/06/01 Support MOXA Industio family boards.
26 * 02/06/01 Support TIOCGICOUNT.
27 * 02/06/01 Fix the problem for connecting to serial mouse.
28 * 02/06/01 Fix the problem for H/W flow control.
29 * 02/06/01 Fix the compling warning when CONFIG_PCI
30 * don't be defined.
31 *
32 * Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
33 * <alan@redhat.com>. The original 1.8 code is available on www.moxa.com.
34 * - Fixed x86_64 cleanness
35 * - Fixed sleep with spinlock held in mxser_send_break
36 */
37
38
39 #include <linux/config.h>
40 #include <linux/module.h>
41 #include <linux/autoconf.h>
42 #include <linux/errno.h>
43 #include <linux/signal.h>
44 #include <linux/sched.h>
45 #include <linux/timer.h>
46 #include <linux/interrupt.h>
47 #include <linux/tty.h>
48 #include <linux/tty_flip.h>
49 #include <linux/serial.h>
50 #include <linux/serial_reg.h>
51 #include <linux/major.h>
52 #include <linux/string.h>
53 #include <linux/fcntl.h>
54 #include <linux/ptrace.h>
55 #include <linux/gfp.h>
56 #include <linux/ioport.h>
57 #include <linux/mm.h>
58 #include <linux/smp_lock.h>
59 #include <linux/delay.h>
60 #include <linux/pci.h>
61
62 #include <asm/system.h>
63 #include <asm/io.h>
64 #include <asm/irq.h>
65 #include <asm/bitops.h>
66 #include <asm/uaccess.h>
67
68 #include "mxser.h"
69
70 #define MXSER_VERSION "1.8"
71 #define MXSERMAJOR 174
72 #define MXSERCUMAJOR 175
73
74 #define MXSER_EVENT_TXLOW 1
75 #define MXSER_EVENT_HANGUP 2
76
77 #define MXSER_BOARDS 4 /* Max. boards */
78 #define MXSER_PORTS 32 /* Max. ports */
79 #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
80 #define MXSER_ISR_PASS_LIMIT 256
81
82 #define MXSER_ERR_IOADDR -1
83 #define MXSER_ERR_IRQ -2
84 #define MXSER_ERR_IRQ_CONFLIT -3
85 #define MXSER_ERR_VECTOR -4
86
87 #define SERIAL_TYPE_NORMAL 1
88 #define SERIAL_TYPE_CALLOUT 2
89
90 #define WAKEUP_CHARS 256
91
92 #define UART_MCR_AFE 0x20
93 #define UART_LSR_SPECIAL 0x1E
94
95 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|\
96 IXON|IXOFF))
97
98 #define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? SA_SHIRQ : SA_INTERRUPT)
99
100 #define C168_ASIC_ID 1
101 #define C104_ASIC_ID 2
102 #define C102_ASIC_ID 0xB
103 #define CI132_ASIC_ID 4
104 #define CI134_ASIC_ID 3
105 #define CI104J_ASIC_ID 5
106
107 enum {
108 MXSER_BOARD_C168_ISA = 1,
109 MXSER_BOARD_C104_ISA,
110 MXSER_BOARD_CI104J,
111 MXSER_BOARD_C168_PCI,
112 MXSER_BOARD_C104_PCI,
113 MXSER_BOARD_C102_ISA,
114 MXSER_BOARD_CI132,
115 MXSER_BOARD_CI134,
116 MXSER_BOARD_CP132,
117 MXSER_BOARD_CP114,
118 MXSER_BOARD_CT114,
119 MXSER_BOARD_CP102,
120 MXSER_BOARD_CP104U,
121 MXSER_BOARD_CP168U,
122 MXSER_BOARD_CP132U,
123 MXSER_BOARD_CP134U,
124 MXSER_BOARD_CP104JU,
125 MXSER_BOARD_RC7000,
126 MXSER_BOARD_CP118U,
127 MXSER_BOARD_CP102UL,
128 MXSER_BOARD_CP102U,
129 };
130
131 static char *mxser_brdname[] = {
132 "C168 series",
133 "C104 series",
134 "CI-104J series",
135 "C168H/PCI series",
136 "C104H/PCI series",
137 "C102 series",
138 "CI-132 series",
139 "CI-134 series",
140 "CP-132 series",
141 "CP-114 series",
142 "CT-114 series",
143 "CP-102 series",
144 "CP-104U series",
145 "CP-168U series",
146 "CP-132U series",
147 "CP-134U series",
148 "CP-104JU series",
149 "Moxa UC7000 Serial",
150 "CP-118U series",
151 "CP-102UL series",
152 "CP-102U series",
153 };
154
155 static int mxser_numports[] = {
156 8, /* C168-ISA */
157 4, /* C104-ISA */
158 4, /* CI104J */
159 8, /* C168-PCI */
160 4, /* C104-PCI */
161 2, /* C102-ISA */
162 2, /* CI132 */
163 4, /* CI134 */
164 2, /* CP132 */
165 4, /* CP114 */
166 4, /* CT114 */
167 2, /* CP102 */
168 4, /* CP104U */
169 8, /* CP168U */
170 2, /* CP132U */
171 4, /* CP134U */
172 4, /* CP104JU */
173 8, /* RC7000 */
174 8, /* CP118U */
175 2, /* CP102UL */
176 2, /* CP102U */
177 };
178
179 #define UART_TYPE_NUM 2
180
181 static const unsigned int Gmoxa_uart_id[UART_TYPE_NUM] = {
182 MOXA_MUST_MU150_HWID,
183 MOXA_MUST_MU860_HWID
184 };
185
186 /* This is only for PCI */
187 #define UART_INFO_NUM 3
188 struct mxpciuart_info {
189 int type;
190 int tx_fifo;
191 int rx_fifo;
192 int xmit_fifo_size;
193 int rx_high_water;
194 int rx_trigger;
195 int rx_low_water;
196 long max_baud;
197 };
198
199 static const struct mxpciuart_info Gpci_uart_info[UART_INFO_NUM] = {
200 {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
201 {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
202 {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
203 };
204
205
206 #ifdef CONFIG_PCI
207
208 static struct pci_device_id mxser_pcibrds[] = {
209 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C168_PCI},
210 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C104_PCI},
211 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132},
212 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP114},
213 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CT114},
214 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102},
215 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104U},
216 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP168U},
217 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132U},
218 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP134U},
219 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104JU},
220 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_RC7000},
221 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP118U},
222 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102UL},
223 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102U},
224 {0}
225 };
226
227 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
228
229
230 #endif
231
232 typedef struct _moxa_pci_info {
233 unsigned short busNum;
234 unsigned short devNum;
235 struct pci_dev *pdev; /* add by Victor Yu. 06-23-2003 */
236 } moxa_pci_info;
237
238 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
239 static int ttymajor = MXSERMAJOR;
240 static int calloutmajor = MXSERCUMAJOR;
241 static int verbose = 0;
242
243 /* Variables for insmod */
244
245 MODULE_AUTHOR("Casper Yang");
246 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
247 module_param_array(ioaddr, int, NULL, 0);
248 module_param(ttymajor, int, 0);
249 module_param(calloutmajor, int, 0);
250 module_param(verbose, bool, 0);
251 MODULE_LICENSE("GPL");
252
253 struct mxser_log {
254 int tick;
255 unsigned long rxcnt[MXSER_PORTS];
256 unsigned long txcnt[MXSER_PORTS];
257 };
258
259
260 struct mxser_mon {
261 unsigned long rxcnt;
262 unsigned long txcnt;
263 unsigned long up_rxcnt;
264 unsigned long up_txcnt;
265 int modem_status;
266 unsigned char hold_reason;
267 };
268
269 struct mxser_mon_ext {
270 unsigned long rx_cnt[32];
271 unsigned long tx_cnt[32];
272 unsigned long up_rxcnt[32];
273 unsigned long up_txcnt[32];
274 int modem_status[32];
275
276 long baudrate[32];
277 int databits[32];
278 int stopbits[32];
279 int parity[32];
280 int flowctrl[32];
281 int fifo[32];
282 int iftype[32];
283 };
284
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 struct mxser_mstatus {
351 tcflag_t cflag;
352 int cts;
353 int dsr;
354 int ri;
355 int dcd;
356 };
357
358 static struct mxser_mstatus GMStatus[MXSER_PORTS];
359
360 static int mxserBoardCAP[MXSER_BOARDS] = {
361 0, 0, 0, 0
362 /* 0x180, 0x280, 0x200, 0x320 */
363 };
364
365 static struct tty_driver *mxvar_sdriver;
366 static struct mxser_struct mxvar_table[MXSER_PORTS];
367 static struct tty_struct *mxvar_tty[MXSER_PORTS + 1];
368 static struct termios *mxvar_termios[MXSER_PORTS + 1];
369 static struct termios *mxvar_termios_locked[MXSER_PORTS + 1];
370 static struct mxser_log mxvar_log;
371 static int mxvar_diagflag;
372 static unsigned char mxser_msr[MXSER_PORTS + 1];
373 static struct mxser_mon_ext mon_data_ext;
374 static int mxser_set_baud_method[MXSER_PORTS + 1];
375 static spinlock_t gm_lock;
376
377 /*
378 * This is used to figure out the divisor speeds and the timeouts
379 */
380
381 static struct mxser_hwconf mxsercfg[MXSER_BOARDS];
382
383 /*
384 * static functions:
385 */
386
387 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf);
388 static int mxser_init(void);
389
390 /* static void mxser_poll(unsigned long); */
391 static int mxser_get_ISA_conf(int, struct mxser_hwconf *);
392 static int mxser_get_PCI_conf(int, int, int, struct mxser_hwconf *);
393 static void mxser_do_softint(void *);
394 static int mxser_open(struct tty_struct *, struct file *);
395 static void mxser_close(struct tty_struct *, struct file *);
396 static int mxser_write(struct tty_struct *, const unsigned char *, int);
397 static int mxser_write_room(struct tty_struct *);
398 static void mxser_flush_buffer(struct tty_struct *);
399 static int mxser_chars_in_buffer(struct tty_struct *);
400 static void mxser_flush_chars(struct tty_struct *);
401 static void mxser_put_char(struct tty_struct *, unsigned char);
402 static int mxser_ioctl(struct tty_struct *, struct file *, uint, ulong);
403 static int mxser_ioctl_special(unsigned int, void __user *);
404 static void mxser_throttle(struct tty_struct *);
405 static void mxser_unthrottle(struct tty_struct *);
406 static void mxser_set_termios(struct tty_struct *, struct termios *);
407 static void mxser_stop(struct tty_struct *);
408 static void mxser_start(struct tty_struct *);
409 static void mxser_hangup(struct tty_struct *);
410 static void mxser_rs_break(struct tty_struct *, int);
411 static irqreturn_t mxser_interrupt(int, void *, struct pt_regs *);
412 static void mxser_receive_chars(struct mxser_struct *, int *);
413 static void mxser_transmit_chars(struct mxser_struct *);
414 static void mxser_check_modem_status(struct mxser_struct *, int);
415 static int mxser_block_til_ready(struct tty_struct *, struct file *, struct mxser_struct *);
416 static int mxser_startup(struct mxser_struct *);
417 static void mxser_shutdown(struct mxser_struct *);
418 static int mxser_change_speed(struct mxser_struct *, struct termios *old_termios);
419 static int mxser_get_serial_info(struct mxser_struct *, struct serial_struct __user *);
420 static int mxser_set_serial_info(struct mxser_struct *, struct serial_struct __user *);
421 static int mxser_get_lsr_info(struct mxser_struct *, unsigned int __user *);
422 static void mxser_send_break(struct mxser_struct *, int);
423 static int mxser_tiocmget(struct tty_struct *, struct file *);
424 static int mxser_tiocmset(struct tty_struct *, struct file *, unsigned int, unsigned int);
425 static int mxser_set_baud(struct mxser_struct *info, long newspd);
426 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout);
427
428 static void mxser_startrx(struct tty_struct *tty);
429 static void mxser_stoprx(struct tty_struct *tty);
430
431
432 static int CheckIsMoxaMust(int io)
433 {
434 u8 oldmcr, hwid;
435 int i;
436
437 outb(0, io + UART_LCR);
438 DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
439 oldmcr = inb(io + UART_MCR);
440 outb(0, io + UART_MCR);
441 SET_MOXA_MUST_XON1_VALUE(io, 0x11);
442 if ((hwid = inb(io + UART_MCR)) != 0) {
443 outb(oldmcr, io + UART_MCR);
444 return MOXA_OTHER_UART;
445 }
446
447 GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
448 for (i = 0; i < UART_TYPE_NUM; i++) {
449 if (hwid == Gmoxa_uart_id[i])
450 return (int)hwid;
451 }
452 return MOXA_OTHER_UART;
453 }
454
455 /* above is modified by Victor Yu. 08-15-2002 */
456
457 static struct tty_operations mxser_ops = {
458 .open = mxser_open,
459 .close = mxser_close,
460 .write = mxser_write,
461 .put_char = mxser_put_char,
462 .flush_chars = mxser_flush_chars,
463 .write_room = mxser_write_room,
464 .chars_in_buffer = mxser_chars_in_buffer,
465 .flush_buffer = mxser_flush_buffer,
466 .ioctl = mxser_ioctl,
467 .throttle = mxser_throttle,
468 .unthrottle = mxser_unthrottle,
469 .set_termios = mxser_set_termios,
470 .stop = mxser_stop,
471 .start = mxser_start,
472 .hangup = mxser_hangup,
473 .break_ctl = mxser_rs_break,
474 .wait_until_sent = mxser_wait_until_sent,
475 .tiocmget = mxser_tiocmget,
476 .tiocmset = mxser_tiocmset,
477 };
478
479 /*
480 * The MOXA Smartio/Industio serial driver boot-time initialization code!
481 */
482
483 static int __init mxser_module_init(void)
484 {
485 int ret;
486
487 if (verbose)
488 printk(KERN_DEBUG "Loading module mxser ...\n");
489 ret = mxser_init();
490 if (verbose)
491 printk(KERN_DEBUG "Done.\n");
492 return ret;
493 }
494
495 static void __exit mxser_module_exit(void)
496 {
497 int i, err;
498
499 if (verbose)
500 printk(KERN_DEBUG "Unloading module mxser ...\n");
501
502 err = tty_unregister_driver(mxvar_sdriver);
503 if (!err)
504 put_tty_driver(mxvar_sdriver);
505 else
506 printk(KERN_ERR "Couldn't unregister MOXA Smartio/Industio family serial driver\n");
507
508 for (i = 0; i < MXSER_BOARDS; i++) {
509 struct pci_dev *pdev;
510
511 if (mxsercfg[i].board_type == -1)
512 continue;
513 else {
514 pdev = mxsercfg[i].pciInfo.pdev;
515 free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
516 if (pdev != NULL) { /* PCI */
517 release_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2));
518 release_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3));
519 } else {
520 release_region(mxsercfg[i].ioaddr[0], 8 * mxsercfg[i].ports);
521 release_region(mxsercfg[i].vector, 1);
522 }
523 }
524 }
525 if (verbose)
526 printk(KERN_DEBUG "Done.\n");
527 }
528
529 static void process_txrx_fifo(struct mxser_struct *info)
530 {
531 int i;
532
533 if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
534 info->rx_trigger = 1;
535 info->rx_high_water = 1;
536 info->rx_low_water = 1;
537 info->xmit_fifo_size = 1;
538 } else {
539 for (i = 0; i < UART_INFO_NUM; i++) {
540 if (info->IsMoxaMustChipFlag == Gpci_uart_info[i].type) {
541 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
542 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
543 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
544 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
545 break;
546 }
547 }
548 }
549 }
550
551 static int mxser_initbrd(int board, struct mxser_hwconf *hwconf)
552 {
553 struct mxser_struct *info;
554 int retval;
555 int i, n;
556
557 n = board * MXSER_PORTS_PER_BOARD;
558 info = &mxvar_table[n];
559 /*if (verbose) */ {
560 printk(KERN_DEBUG " ttyM%d - ttyM%d ",
561 n, n + hwconf->ports - 1);
562 printk(" max. baud rate = %d bps.\n",
563 hwconf->MaxCanSetBaudRate[0]);
564 }
565
566 for (i = 0; i < hwconf->ports; i++, n++, info++) {
567 info->port = n;
568 info->base = hwconf->ioaddr[i];
569 info->irq = hwconf->irq;
570 info->vector = hwconf->vector;
571 info->vectormask = hwconf->vector_mask;
572 info->opmode_ioaddr = hwconf->opmode_ioaddr[i]; /* add by Victor Yu. 01-05-2004 */
573 info->stop_rx = 0;
574 info->ldisc_stop_rx = 0;
575
576 info->IsMoxaMustChipFlag = hwconf->IsMoxaMustChipFlag;
577 /* Enhance mode enabled here */
578 if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
579 ENABLE_MOXA_MUST_ENCHANCE_MODE(info->base);
580 }
581
582 info->flags = ASYNC_SHARE_IRQ;
583 info->type = hwconf->uart_type;
584 info->baud_base = hwconf->baud_base[i];
585
586 info->MaxCanSetBaudRate = hwconf->MaxCanSetBaudRate[i];
587
588 process_txrx_fifo(info);
589
590
591 info->custom_divisor = hwconf->baud_base[i] * 16;
592 info->close_delay = 5 * HZ / 10;
593 info->closing_wait = 30 * HZ;
594 INIT_WORK(&info->tqueue, mxser_do_softint, info);
595 info->normal_termios = mxvar_sdriver->init_termios;
596 init_waitqueue_head(&info->open_wait);
597 init_waitqueue_head(&info->close_wait);
598 init_waitqueue_head(&info->delta_msr_wait);
599 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
600 info->err_shadow = 0;
601 spin_lock_init(&info->slock);
602 }
603 /*
604 * Allocate the IRQ if necessary
605 */
606
607
608 /* before set INT ISR, disable all int */
609 for (i = 0; i < hwconf->ports; i++) {
610 outb(inb(hwconf->ioaddr[i] + UART_IER) & 0xf0,
611 hwconf->ioaddr[i] + UART_IER);
612 }
613
614 n = board * MXSER_PORTS_PER_BOARD;
615 info = &mxvar_table[n];
616
617 retval = request_irq(hwconf->irq, mxser_interrupt, IRQ_T(info),
618 "mxser", info);
619 if (retval) {
620 printk(KERN_ERR "Board %d: %s",
621 board, mxser_brdname[hwconf->board_type - 1]);
622 printk(" Request irq failed, IRQ (%d) may conflict with"
623 " another device.\n", info->irq);
624 return retval;
625 }
626 return 0;
627 }
628
629 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf)
630 {
631 mxsercfg[board] = *hwconf;
632 }
633
634 #ifdef CONFIG_PCI
635 static int mxser_get_PCI_conf(int busnum, int devnum, int board_type, struct mxser_hwconf *hwconf)
636 {
637 int i, j;
638 /* unsigned int val; */
639 unsigned int ioaddress;
640 struct pci_dev *pdev = hwconf->pciInfo.pdev;
641
642 /* io address */
643 hwconf->board_type = board_type;
644 hwconf->ports = mxser_numports[board_type - 1];
645 ioaddress = pci_resource_start(pdev, 2);
646 request_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2),
647 "mxser(IO)");
648
649 for (i = 0; i < hwconf->ports; i++)
650 hwconf->ioaddr[i] = ioaddress + 8 * i;
651
652 /* vector */
653 ioaddress = pci_resource_start(pdev, 3);
654 request_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3),
655 "mxser(vector)");
656 hwconf->vector = ioaddress;
657
658 /* irq */
659 hwconf->irq = hwconf->pciInfo.pdev->irq;
660
661 hwconf->IsMoxaMustChipFlag = CheckIsMoxaMust(hwconf->ioaddr[0]);
662 hwconf->uart_type = PORT_16550A;
663 hwconf->vector_mask = 0;
664
665
666 for (i = 0; i < hwconf->ports; i++) {
667 for (j = 0; j < UART_INFO_NUM; j++) {
668 if (Gpci_uart_info[j].type == hwconf->IsMoxaMustChipFlag) {
669 hwconf->MaxCanSetBaudRate[i] = Gpci_uart_info[j].max_baud;
670
671 /* exception....CP-102 */
672 if (board_type == MXSER_BOARD_CP102)
673 hwconf->MaxCanSetBaudRate[i] = 921600;
674 break;
675 }
676 }
677 }
678
679 if (hwconf->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID) {
680 for (i = 0; i < hwconf->ports; i++) {
681 if (i < 4)
682 hwconf->opmode_ioaddr[i] = ioaddress + 4;
683 else
684 hwconf->opmode_ioaddr[i] = ioaddress + 0x0c;
685 }
686 outb(0, ioaddress + 4); /* default set to RS232 mode */
687 outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
688 }
689
690 for (i = 0; i < hwconf->ports; i++) {
691 hwconf->vector_mask |= (1 << i);
692 hwconf->baud_base[i] = 921600;
693 }
694 return 0;
695 }
696 #endif
697
698 static int mxser_init(void)
699 {
700 int i, m, retval, b, n;
701 struct pci_dev *pdev = NULL;
702 int index;
703 unsigned char busnum, devnum;
704 struct mxser_hwconf hwconf;
705
706 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
707 if (!mxvar_sdriver)
708 return -ENOMEM;
709 spin_lock_init(&gm_lock);
710
711 for (i = 0; i < MXSER_BOARDS; i++) {
712 mxsercfg[i].board_type = -1;
713 }
714
715 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
716 MXSER_VERSION);
717
718 /* Initialize the tty_driver structure */
719 memset(mxvar_sdriver, 0, sizeof(struct tty_driver));
720 mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
721 mxvar_sdriver->name = "ttyM";
722 mxvar_sdriver->major = ttymajor;
723 mxvar_sdriver->minor_start = 0;
724 mxvar_sdriver->num = MXSER_PORTS + 1;
725 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
726 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
727 mxvar_sdriver->init_termios = tty_std_termios;
728 mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
729 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW;
730 tty_set_operations(mxvar_sdriver, &mxser_ops);
731 mxvar_sdriver->ttys = mxvar_tty;
732 mxvar_sdriver->termios = mxvar_termios;
733 mxvar_sdriver->termios_locked = mxvar_termios_locked;
734
735 mxvar_diagflag = 0;
736 memset(mxvar_table, 0, MXSER_PORTS * sizeof(struct mxser_struct));
737 memset(&mxvar_log, 0, sizeof(struct mxser_log));
738
739 memset(&mxser_msr, 0, sizeof(unsigned char) * (MXSER_PORTS + 1));
740 memset(&mon_data_ext, 0, sizeof(struct mxser_mon_ext));
741 memset(&mxser_set_baud_method, 0, sizeof(int) * (MXSER_PORTS + 1));
742 memset(&hwconf, 0, sizeof(struct mxser_hwconf));
743
744 m = 0;
745 /* Start finding ISA boards here */
746 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
747 int cap;
748
749 if (!(cap = mxserBoardCAP[b]))
750 continue;
751
752 retval = mxser_get_ISA_conf(cap, &hwconf);
753
754 if (retval != 0)
755 printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
756 mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
757
758 if (retval <= 0) {
759 if (retval == MXSER_ERR_IRQ)
760 printk(KERN_ERR "Invalid interrupt number, "
761 "board not configured\n");
762 else if (retval == MXSER_ERR_IRQ_CONFLIT)
763 printk(KERN_ERR "Invalid interrupt number, "
764 "board not configured\n");
765 else if (retval == MXSER_ERR_VECTOR)
766 printk(KERN_ERR "Invalid interrupt vector, "
767 "board not configured\n");
768 else if (retval == MXSER_ERR_IOADDR)
769 printk(KERN_ERR "Invalid I/O address, "
770 "board not configured\n");
771
772 continue;
773 }
774
775 hwconf.pciInfo.busNum = 0;
776 hwconf.pciInfo.devNum = 0;
777 hwconf.pciInfo.pdev = NULL;
778
779 mxser_getcfg(m, &hwconf);
780 /*
781 * init mxsercfg first,
782 * or mxsercfg data is not correct on ISR.
783 */
784 /* mxser_initbrd will hook ISR. */
785 if (mxser_initbrd(m, &hwconf) < 0)
786 continue;
787
788 m++;
789 }
790
791 /* Start finding ISA boards from module arg */
792 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
793 int cap;
794
795 if (!(cap = ioaddr[b]))
796 continue;
797
798 retval = mxser_get_ISA_conf(cap, &hwconf);
799
800 if (retval != 0)
801 printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
802 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, "
807 "board not configured\n");
808 else if (retval == MXSER_ERR_IRQ_CONFLIT)
809 printk(KERN_ERR "Invalid interrupt number, "
810 "board not configured\n");
811 else if (retval == MXSER_ERR_VECTOR)
812 printk(KERN_ERR "Invalid interrupt vector, "
813 "board not configured\n");
814 else if (retval == MXSER_ERR_IOADDR)
815 printk(KERN_ERR "Invalid I/O address, "
816 "board not configured\n");
817
818 continue;
819 }
820
821 hwconf.pciInfo.busNum = 0;
822 hwconf.pciInfo.devNum = 0;
823 hwconf.pciInfo.pdev = NULL;
824
825 mxser_getcfg(m, &hwconf);
826 /*
827 * init mxsercfg first,
828 * or mxsercfg data is not correct on ISR.
829 */
830 /* mxser_initbrd will hook ISR. */
831 if (mxser_initbrd(m, &hwconf) < 0)
832 continue;
833
834 m++;
835 }
836
837 /* start finding PCI board here */
838 #ifdef CONFIG_PCI
839 n = ARRAY_SIZE(mxser_pcibrds) - 1;
840 index = 0;
841 b = 0;
842 while (b < n) {
843 pdev = pci_find_device(mxser_pcibrds[b].vendor,
844 mxser_pcibrds[b].device, pdev);
845 if (pdev == NULL) {
846 b++;
847 continue;
848 }
849 hwconf.pciInfo.busNum = busnum = pdev->bus->number;
850 hwconf.pciInfo.devNum = devnum = PCI_SLOT(pdev->devfn) << 3;
851 hwconf.pciInfo.pdev = pdev;
852 printk(KERN_INFO "Found MOXA %s board(BusNo=%d,DevNo=%d)\n",
853 mxser_brdname[(int) (mxser_pcibrds[b].driver_data) - 1],
854 busnum, devnum >> 3);
855 index++;
856 if (m >= MXSER_BOARDS)
857 printk(KERN_ERR
858 "Too many Smartio/Industio family boards find "
859 "(maximum %d), board not configured\n",
860 MXSER_BOARDS);
861 else {
862 if (pci_enable_device(pdev)) {
863 printk(KERN_ERR "Moxa SmartI/O PCI enable "
864 "fail !\n");
865 continue;
866 }
867 retval = mxser_get_PCI_conf(busnum, devnum,
868 (int)mxser_pcibrds[b].driver_data,
869 &hwconf);
870 if (retval < 0) {
871 if (retval == MXSER_ERR_IRQ)
872 printk(KERN_ERR
873 "Invalid interrupt number, "
874 "board not configured\n");
875 else if (retval == MXSER_ERR_IRQ_CONFLIT)
876 printk(KERN_ERR
877 "Invalid interrupt number, "
878 "board not configured\n");
879 else if (retval == MXSER_ERR_VECTOR)
880 printk(KERN_ERR
881 "Invalid interrupt vector, "
882 "board not configured\n");
883 else if (retval == MXSER_ERR_IOADDR)
884 printk(KERN_ERR
885 "Invalid I/O address, "
886 "board not configured\n");
887 continue;
888 }
889 mxser_getcfg(m, &hwconf);
890 /* init mxsercfg first,
891 * or mxsercfg data is not correct on ISR.
892 */
893 /* mxser_initbrd will hook ISR. */
894 if (mxser_initbrd(m, &hwconf) < 0)
895 continue;
896 m++;
897 }
898 }
899 #endif
900
901 retval = tty_register_driver(mxvar_sdriver);
902 if (retval) {
903 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family"
904 " driver !\n");
905 put_tty_driver(mxvar_sdriver);
906
907 for (i = 0; i < MXSER_BOARDS; i++) {
908 if (mxsercfg[i].board_type == -1)
909 continue;
910 else {
911 free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
912 /* todo: release io, vector */
913 }
914 }
915 return retval;
916 }
917
918 return 0;
919 }
920
921 static void mxser_do_softint(void *private_)
922 {
923 struct mxser_struct *info = private_;
924 struct tty_struct *tty;
925
926 tty = info->tty;
927
928 if (tty) {
929 if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
930 tty_wakeup(tty);
931 if (test_and_clear_bit(MXSER_EVENT_HANGUP, &info->event))
932 tty_hangup(tty);
933 }
934 }
935
936 static unsigned char mxser_get_msr(int baseaddr, int mode, int port, struct mxser_struct *info)
937 {
938 unsigned char status = 0;
939
940 status = inb(baseaddr + UART_MSR);
941
942 mxser_msr[port] &= 0x0F;
943 mxser_msr[port] |= status;
944 status = mxser_msr[port];
945 if (mode)
946 mxser_msr[port] = 0;
947
948 return status;
949 }
950
951 /*
952 * This routine is called whenever a serial port is opened. It
953 * enables interrupts for a serial port, linking in its async structure into
954 * the IRQ chain. It also performs the serial-specific
955 * initialization for the tty structure.
956 */
957 static int mxser_open(struct tty_struct *tty, struct file *filp)
958 {
959 struct mxser_struct *info;
960 int retval, line;
961
962 /* initialize driver_data in case something fails */
963 tty->driver_data = NULL;
964
965 line = tty->index;
966 if (line == MXSER_PORTS)
967 return 0;
968 if (line < 0 || line > MXSER_PORTS)
969 return -ENODEV;
970 info = mxvar_table + line;
971 if (!info->base)
972 return -ENODEV;
973
974 tty->driver_data = info;
975 info->tty = tty;
976 /*
977 * Start up serial port
978 */
979 retval = mxser_startup(info);
980 if (retval)
981 return retval;
982
983 retval = mxser_block_til_ready(tty, filp, info);
984 if (retval)
985 return retval;
986
987 info->count++;
988
989 if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
990 if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
991 *tty->termios = info->normal_termios;
992 else
993 *tty->termios = info->callout_termios;
994 mxser_change_speed(info, NULL);
995 }
996
997 info->session = current->signal->session;
998 info->pgrp = process_group(current);
999
1000 /*
1001 status = mxser_get_msr(info->base, 0, info->port);
1002 mxser_check_modem_status(info, status);
1003 */
1004
1005 /* unmark here for very high baud rate (ex. 921600 bps) used */
1006 tty->low_latency = 1;
1007 return 0;
1008 }
1009
1010 /*
1011 * This routine is called when the serial port gets closed. First, we
1012 * wait for the last remaining data to be sent. Then, we unlink its
1013 * async structure from the interrupt chain if necessary, and we free
1014 * that IRQ if nothing is left in the chain.
1015 */
1016 static void mxser_close(struct tty_struct *tty, struct file *filp)
1017 {
1018 struct mxser_struct *info = tty->driver_data;
1019
1020 unsigned long timeout;
1021 unsigned long flags;
1022 struct tty_ldisc *ld;
1023
1024 if (tty->index == MXSER_PORTS)
1025 return;
1026 if (!info)
1027 return;
1028
1029 spin_lock_irqsave(&info->slock, flags);
1030
1031 if (tty_hung_up_p(filp)) {
1032 spin_unlock_irqrestore(&info->slock, flags);
1033 return;
1034 }
1035 if ((tty->count == 1) && (info->count != 1)) {
1036 /*
1037 * Uh, oh. tty->count is 1, which means that the tty
1038 * structure will be freed. Info->count should always
1039 * be one in these conditions. If it's greater than
1040 * one, we've got real problems, since it means the
1041 * serial port won't be shutdown.
1042 */
1043 printk(KERN_ERR "mxser_close: bad serial port count; "
1044 "tty->count is 1, info->count is %d\n", info->count);
1045 info->count = 1;
1046 }
1047 if (--info->count < 0) {
1048 printk(KERN_ERR "mxser_close: bad serial port count for "
1049 "ttys%d: %d\n", info->port, info->count);
1050 info->count = 0;
1051 }
1052 if (info->count) {
1053 spin_unlock_irqrestore(&info->slock, flags);
1054 return;
1055 }
1056 info->flags |= ASYNC_CLOSING;
1057 spin_unlock_irqrestore(&info->slock, flags);
1058 /*
1059 * Save the termios structure, since this port may have
1060 * separate termios for callout and dialin.
1061 */
1062 if (info->flags & ASYNC_NORMAL_ACTIVE)
1063 info->normal_termios = *tty->termios;
1064 /*
1065 * Now we wait for the transmit buffer to clear; and we notify
1066 * the line discipline to only process XON/XOFF characters.
1067 */
1068 tty->closing = 1;
1069 if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1070 tty_wait_until_sent(tty, info->closing_wait);
1071 /*
1072 * At this point we stop accepting input. To do this, we
1073 * disable the receive line status interrupts, and tell the
1074 * interrupt driver to stop checking the data ready bit in the
1075 * line status register.
1076 */
1077 info->IER &= ~UART_IER_RLSI;
1078 if (info->IsMoxaMustChipFlag)
1079 info->IER &= ~MOXA_MUST_RECV_ISR;
1080 /* by William
1081 info->read_status_mask &= ~UART_LSR_DR;
1082 */
1083 if (info->flags & ASYNC_INITIALIZED) {
1084 outb(info->IER, info->base + UART_IER);
1085 /*
1086 * Before we drop DTR, make sure the UART transmitter
1087 * has completely drained; this is especially
1088 * important if there is a transmit FIFO!
1089 */
1090 timeout = jiffies + HZ;
1091 while (!(inb(info->base + UART_LSR) & UART_LSR_TEMT)) {
1092 schedule_timeout_interruptible(5);
1093 if (time_after(jiffies, timeout))
1094 break;
1095 }
1096 }
1097 mxser_shutdown(info);
1098
1099 if (tty->driver->flush_buffer)
1100 tty->driver->flush_buffer(tty);
1101
1102 ld = tty_ldisc_ref(tty);
1103 if (ld) {
1104 if (ld->flush_buffer)
1105 ld->flush_buffer(tty);
1106 tty_ldisc_deref(ld);
1107 }
1108
1109 tty->closing = 0;
1110 info->event = 0;
1111 info->tty = NULL;
1112 if (info->blocked_open) {
1113 if (info->close_delay)
1114 schedule_timeout_interruptible(info->close_delay);
1115 wake_up_interruptible(&info->open_wait);
1116 }
1117
1118 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1119 wake_up_interruptible(&info->close_wait);
1120
1121 }
1122
1123 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1124 {
1125 int c, total = 0;
1126 struct mxser_struct *info = tty->driver_data;
1127 unsigned long flags;
1128
1129 if (!info->xmit_buf)
1130 return 0;
1131
1132 while (1) {
1133 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1134 SERIAL_XMIT_SIZE - info->xmit_head));
1135 if (c <= 0)
1136 break;
1137
1138 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1139 spin_lock_irqsave(&info->slock, flags);
1140 info->xmit_head = (info->xmit_head + c) &
1141 (SERIAL_XMIT_SIZE - 1);
1142 info->xmit_cnt += c;
1143 spin_unlock_irqrestore(&info->slock, flags);
1144
1145 buf += c;
1146 count -= c;
1147 total += c;
1148 }
1149
1150 if (info->xmit_cnt && !tty->stopped && !(info->IER & UART_IER_THRI)) {
1151 if (!tty->hw_stopped ||
1152 (info->type == PORT_16550A) ||
1153 (info->IsMoxaMustChipFlag)) {
1154 spin_lock_irqsave(&info->slock, flags);
1155 info->IER |= UART_IER_THRI;
1156 outb(info->IER, info->base + UART_IER);
1157 spin_unlock_irqrestore(&info->slock, flags);
1158 }
1159 }
1160 return total;
1161 }
1162
1163 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1164 {
1165 struct mxser_struct *info = tty->driver_data;
1166 unsigned long flags;
1167
1168 if (!info->xmit_buf)
1169 return;
1170
1171 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1172 return;
1173
1174 spin_lock_irqsave(&info->slock, flags);
1175 info->xmit_buf[info->xmit_head++] = ch;
1176 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1177 info->xmit_cnt++;
1178 spin_unlock_irqrestore(&info->slock, flags);
1179 if (!tty->stopped && !(info->IER & UART_IER_THRI)) {
1180 if (!tty->hw_stopped ||
1181 (info->type == PORT_16550A) ||
1182 info->IsMoxaMustChipFlag) {
1183 spin_lock_irqsave(&info->slock, flags);
1184 info->IER |= UART_IER_THRI;
1185 outb(info->IER, info->base + UART_IER);
1186 spin_unlock_irqrestore(&info->slock, flags);
1187 }
1188 }
1189 }
1190
1191
1192 static void mxser_flush_chars(struct tty_struct *tty)
1193 {
1194 struct mxser_struct *info = tty->driver_data;
1195 unsigned long flags;
1196
1197 if (info->xmit_cnt <= 0 ||
1198 tty->stopped ||
1199 !info->xmit_buf ||
1200 (tty->hw_stopped &&
1201 (info->type != PORT_16550A) &&
1202 (!info->IsMoxaMustChipFlag)
1203 ))
1204 return;
1205
1206 spin_lock_irqsave(&info->slock, flags);
1207
1208 info->IER |= UART_IER_THRI;
1209 outb(info->IER, info->base + UART_IER);
1210
1211 spin_unlock_irqrestore(&info->slock, flags);
1212 }
1213
1214 static int mxser_write_room(struct tty_struct *tty)
1215 {
1216 struct mxser_struct *info = tty->driver_data;
1217 int ret;
1218
1219 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1220 if (ret < 0)
1221 ret = 0;
1222 return ret;
1223 }
1224
1225 static int mxser_chars_in_buffer(struct tty_struct *tty)
1226 {
1227 struct mxser_struct *info = tty->driver_data;
1228 return info->xmit_cnt;
1229 }
1230
1231 static void mxser_flush_buffer(struct tty_struct *tty)
1232 {
1233 struct mxser_struct *info = tty->driver_data;
1234 char fcr;
1235 unsigned long flags;
1236
1237
1238 spin_lock_irqsave(&info->slock, flags);
1239 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1240
1241 /* below added by shinhay */
1242 fcr = inb(info->base + UART_FCR);
1243 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1244 info->base + UART_FCR);
1245 outb(fcr, info->base + UART_FCR);
1246
1247 spin_unlock_irqrestore(&info->slock, flags);
1248 /* above added by shinhay */
1249
1250 wake_up_interruptible(&tty->write_wait);
1251 if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
1252 (tty->ldisc.write_wakeup) (tty);
1253 }
1254
1255 static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1256 {
1257 struct mxser_struct *info = tty->driver_data;
1258 int retval;
1259 struct async_icount cprev, cnow; /* kernel counter temps */
1260 struct serial_icounter_struct __user *p_cuser;
1261 unsigned long templ;
1262 unsigned long flags;
1263 void __user *argp = (void __user *)arg;
1264
1265 if (tty->index == MXSER_PORTS)
1266 return mxser_ioctl_special(cmd, argp);
1267
1268 /* following add by Victor Yu. 01-05-2004 */
1269 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1270 int opmode, p;
1271 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1272 int shiftbit;
1273 unsigned char val, mask;
1274
1275 p = info->port % 4;
1276 if (cmd == MOXA_SET_OP_MODE) {
1277 if (get_user(opmode, (int __user *) argp))
1278 return -EFAULT;
1279 if (opmode != RS232_MODE &&
1280 opmode != RS485_2WIRE_MODE &&
1281 opmode != RS422_MODE &&
1282 opmode != RS485_4WIRE_MODE)
1283 return -EFAULT;
1284 mask = ModeMask[p];
1285 shiftbit = p * 2;
1286 val = inb(info->opmode_ioaddr);
1287 val &= mask;
1288 val |= (opmode << shiftbit);
1289 outb(val, info->opmode_ioaddr);
1290 } else {
1291 shiftbit = p * 2;
1292 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1293 opmode &= OP_MODE_MASK;
1294 if (copy_to_user(argp, &opmode, sizeof(int)))
1295 return -EFAULT;
1296 }
1297 return 0;
1298 }
1299 /* above add by Victor Yu. 01-05-2004 */
1300
1301 if ((cmd != TIOCGSERIAL) && (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1302 if (tty->flags & (1 << TTY_IO_ERROR))
1303 return -EIO;
1304 }
1305 switch (cmd) {
1306 case TCSBRK: /* SVID version: non-zero arg --> no break */
1307 retval = tty_check_change(tty);
1308 if (retval)
1309 return retval;
1310 tty_wait_until_sent(tty, 0);
1311 if (!arg)
1312 mxser_send_break(info, HZ / 4); /* 1/4 second */
1313 return 0;
1314 case TCSBRKP: /* support for POSIX tcsendbreak() */
1315 retval = tty_check_change(tty);
1316 if (retval)
1317 return retval;
1318 tty_wait_until_sent(tty, 0);
1319 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1320 return 0;
1321 case TIOCGSOFTCAR:
1322 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
1323 case TIOCSSOFTCAR:
1324 if (get_user(templ, (unsigned long __user *) argp))
1325 return -EFAULT;
1326 arg = templ;
1327 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1328 return 0;
1329 case TIOCGSERIAL:
1330 return mxser_get_serial_info(info, argp);
1331 case TIOCSSERIAL:
1332 return mxser_set_serial_info(info, argp);
1333 case TIOCSERGETLSR: /* Get line status register */
1334 return mxser_get_lsr_info(info, argp);
1335 /*
1336 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1337 * - mask passed in arg for lines of interest
1338 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1339 * Caller should use TIOCGICOUNT to see which one it was
1340 */
1341 case TIOCMIWAIT: {
1342 DECLARE_WAITQUEUE(wait, current);
1343 int ret;
1344 spin_lock_irqsave(&info->slock, flags);
1345 cprev = info->icount; /* note the counters on entry */
1346 spin_unlock_irqrestore(&info->slock, flags);
1347
1348 add_wait_queue(&info->delta_msr_wait, &wait);
1349 while (1) {
1350 spin_lock_irqsave(&info->slock, flags);
1351 cnow = info->icount; /* atomic copy */
1352 spin_unlock_irqrestore(&info->slock, flags);
1353
1354 set_current_state(TASK_INTERRUPTIBLE);
1355 if (((arg & TIOCM_RNG) &&
1356 (cnow.rng != cprev.rng)) ||
1357 ((arg & TIOCM_DSR) &&
1358 (cnow.dsr != cprev.dsr)) ||
1359 ((arg & TIOCM_CD) &&
1360 (cnow.dcd != cprev.dcd)) ||
1361 ((arg & TIOCM_CTS) &&
1362 (cnow.cts != cprev.cts))) {
1363 ret = 0;
1364 break;
1365 }
1366 /* see if a signal did it */
1367 if (signal_pending(current)) {
1368 ret = -ERESTARTSYS;
1369 break;
1370 }
1371 cprev = cnow;
1372 }
1373 current->state = TASK_RUNNING;
1374 remove_wait_queue(&info->delta_msr_wait, &wait);
1375 break;
1376 }
1377 /* NOTREACHED */
1378 /*
1379 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1380 * Return: write counters to the user passed counter struct
1381 * NB: both 1->0 and 0->1 transitions are counted except for
1382 * RI where only 0->1 is counted.
1383 */
1384 case TIOCGICOUNT:
1385 spin_lock_irqsave(&info->slock, flags);
1386 cnow = info->icount;
1387 spin_unlock_irqrestore(&info->slock, flags);
1388 p_cuser = argp;
1389 /* modified by casper 1/11/2000 */
1390 if (put_user(cnow.frame, &p_cuser->frame))
1391 return -EFAULT;
1392 if (put_user(cnow.brk, &p_cuser->brk))
1393 return -EFAULT;
1394 if (put_user(cnow.overrun, &p_cuser->overrun))
1395 return -EFAULT;
1396 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1397 return -EFAULT;
1398 if (put_user(cnow.parity, &p_cuser->parity))
1399 return -EFAULT;
1400 if (put_user(cnow.rx, &p_cuser->rx))
1401 return -EFAULT;
1402 if (put_user(cnow.tx, &p_cuser->tx))
1403 return -EFAULT;
1404 put_user(cnow.cts, &p_cuser->cts);
1405 put_user(cnow.dsr, &p_cuser->dsr);
1406 put_user(cnow.rng, &p_cuser->rng);
1407 put_user(cnow.dcd, &p_cuser->dcd);
1408 return 0;
1409 case MOXA_HighSpeedOn:
1410 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1411 case MOXA_SDS_RSTICOUNTER: {
1412 info->mon_data.rxcnt = 0;
1413 info->mon_data.txcnt = 0;
1414 return 0;
1415 }
1416 /* (above) added by James. */
1417 case MOXA_ASPP_SETBAUD:{
1418 long baud;
1419 if (get_user(baud, (long __user *)argp))
1420 return -EFAULT;
1421 mxser_set_baud(info, baud);
1422 return 0;
1423 }
1424 case MOXA_ASPP_GETBAUD:
1425 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1426 return -EFAULT;
1427
1428 return 0;
1429
1430 case MOXA_ASPP_OQUEUE:{
1431 int len, lsr;
1432
1433 len = mxser_chars_in_buffer(tty);
1434
1435 lsr = inb(info->base + UART_LSR) & UART_LSR_TEMT;
1436
1437 len += (lsr ? 0 : 1);
1438
1439 if (copy_to_user(argp, &len, sizeof(int)))
1440 return -EFAULT;
1441
1442 return 0;
1443 }
1444 case MOXA_ASPP_MON: {
1445 int mcr, status;
1446
1447 /* info->mon_data.ser_param = tty->termios->c_cflag; */
1448
1449 status = mxser_get_msr(info->base, 1, info->port, info);
1450 mxser_check_modem_status(info, status);
1451
1452 mcr = inb(info->base + UART_MCR);
1453 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1454 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1455 else
1456 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1457
1458 if (mcr & MOXA_MUST_MCR_TX_XON)
1459 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1460 else
1461 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1462
1463 if (info->tty->hw_stopped)
1464 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1465 else
1466 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1467
1468 if (copy_to_user(argp, &info->mon_data,
1469 sizeof(struct mxser_mon)))
1470 return -EFAULT;
1471
1472 return 0;
1473 }
1474
1475 case MOXA_ASPP_LSTATUS: {
1476 if (copy_to_user(argp, &info->err_shadow,
1477 sizeof(unsigned char)))
1478 return -EFAULT;
1479
1480 info->err_shadow = 0;
1481 return 0;
1482 }
1483 case MOXA_SET_BAUD_METHOD: {
1484 int method;
1485
1486 if (get_user(method, (int __user *)argp))
1487 return -EFAULT;
1488 mxser_set_baud_method[info->port] = method;
1489 if (copy_to_user(argp, &method, sizeof(int)))
1490 return -EFAULT;
1491
1492 return 0;
1493 }
1494 default:
1495 return -ENOIOCTLCMD;
1496 }
1497 return 0;
1498 }
1499
1500 #ifndef CMSPAR
1501 #define CMSPAR 010000000000
1502 #endif
1503
1504 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1505 {
1506 int i, result, status;
1507
1508 switch (cmd) {
1509 case MOXA_GET_CONF:
1510 if (copy_to_user(argp, mxsercfg,
1511 sizeof(struct mxser_hwconf) * 4))
1512 return -EFAULT;
1513 return 0;
1514 case MOXA_GET_MAJOR:
1515 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1516 return -EFAULT;
1517 return 0;
1518
1519 case MOXA_GET_CUMAJOR:
1520 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1521 return -EFAULT;
1522 return 0;
1523
1524 case MOXA_CHKPORTENABLE:
1525 result = 0;
1526 for (i = 0; i < MXSER_PORTS; i++) {
1527 if (mxvar_table[i].base)
1528 result |= (1 << i);
1529 }
1530 return put_user(result, (unsigned long __user *)argp);
1531 case MOXA_GETDATACOUNT:
1532 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1533 return -EFAULT;
1534 return 0;
1535 case MOXA_GETMSTATUS:
1536 for (i = 0; i < MXSER_PORTS; i++) {
1537 GMStatus[i].ri = 0;
1538 if (!mxvar_table[i].base) {
1539 GMStatus[i].dcd = 0;
1540 GMStatus[i].dsr = 0;
1541 GMStatus[i].cts = 0;
1542 continue;
1543 }
1544
1545 if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios)
1546 GMStatus[i].cflag = mxvar_table[i].normal_termios.c_cflag;
1547 else
1548 GMStatus[i].cflag = mxvar_table[i].tty->termios->c_cflag;
1549
1550 status = inb(mxvar_table[i].base + UART_MSR);
1551 if (status & 0x80 /*UART_MSR_DCD */ )
1552 GMStatus[i].dcd = 1;
1553 else
1554 GMStatus[i].dcd = 0;
1555
1556 if (status & 0x20 /*UART_MSR_DSR */ )
1557 GMStatus[i].dsr = 1;
1558 else
1559 GMStatus[i].dsr = 0;
1560
1561
1562 if (status & 0x10 /*UART_MSR_CTS */ )
1563 GMStatus[i].cts = 1;
1564 else
1565 GMStatus[i].cts = 0;
1566 }
1567 if (copy_to_user(argp, GMStatus,
1568 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1569 return -EFAULT;
1570 return 0;
1571 case MOXA_ASPP_MON_EXT: {
1572 int status;
1573 int opmode, p;
1574 int shiftbit;
1575 unsigned cflag, iflag;
1576
1577 for (i = 0; i < MXSER_PORTS; i++) {
1578 if (!mxvar_table[i].base)
1579 continue;
1580
1581 status = mxser_get_msr(mxvar_table[i].base, 0,
1582 i, &(mxvar_table[i]));
1583 /*
1584 mxser_check_modem_status(&mxvar_table[i],
1585 status);
1586 */
1587 if (status & UART_MSR_TERI)
1588 mxvar_table[i].icount.rng++;
1589 if (status & UART_MSR_DDSR)
1590 mxvar_table[i].icount.dsr++;
1591 if (status & UART_MSR_DDCD)
1592 mxvar_table[i].icount.dcd++;
1593 if (status & UART_MSR_DCTS)
1594 mxvar_table[i].icount.cts++;
1595
1596 mxvar_table[i].mon_data.modem_status = status;
1597 mon_data_ext.rx_cnt[i] = mxvar_table[i].mon_data.rxcnt;
1598 mon_data_ext.tx_cnt[i] = mxvar_table[i].mon_data.txcnt;
1599 mon_data_ext.up_rxcnt[i] = mxvar_table[i].mon_data.up_rxcnt;
1600 mon_data_ext.up_txcnt[i] = mxvar_table[i].mon_data.up_txcnt;
1601 mon_data_ext.modem_status[i] = mxvar_table[i].mon_data.modem_status;
1602 mon_data_ext.baudrate[i] = mxvar_table[i].realbaud;
1603
1604 if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios) {
1605 cflag = mxvar_table[i].normal_termios.c_cflag;
1606 iflag = mxvar_table[i].normal_termios.c_iflag;
1607 } else {
1608 cflag = mxvar_table[i].tty->termios->c_cflag;
1609 iflag = mxvar_table[i].tty->termios->c_iflag;
1610 }
1611
1612 mon_data_ext.databits[i] = cflag & CSIZE;
1613
1614 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1615
1616 mon_data_ext.parity[i] = cflag & (PARENB | PARODD | CMSPAR);
1617
1618 mon_data_ext.flowctrl[i] = 0x00;
1619
1620 if (cflag & CRTSCTS)
1621 mon_data_ext.flowctrl[i] |= 0x03;
1622
1623 if (iflag & (IXON | IXOFF))
1624 mon_data_ext.flowctrl[i] |= 0x0C;
1625
1626 if (mxvar_table[i].type == PORT_16550A)
1627 mon_data_ext.fifo[i] = 1;
1628 else
1629 mon_data_ext.fifo[i] = 0;
1630
1631 p = i % 4;
1632 shiftbit = p * 2;
1633 opmode = inb(mxvar_table[i].opmode_ioaddr) >> shiftbit;
1634 opmode &= OP_MODE_MASK;
1635
1636 mon_data_ext.iftype[i] = opmode;
1637
1638 }
1639 if (copy_to_user(argp, &mon_data_ext, sizeof(struct mxser_mon_ext)))
1640 return -EFAULT;
1641
1642 return 0;
1643
1644 }
1645 default:
1646 return -ENOIOCTLCMD;
1647 }
1648 return 0;
1649 }
1650
1651 static void mxser_stoprx(struct tty_struct *tty)
1652 {
1653 struct mxser_struct *info = tty->driver_data;
1654 /* unsigned long flags; */
1655
1656 info->ldisc_stop_rx = 1;
1657 if (I_IXOFF(tty)) {
1658 /* MX_LOCK(&info->slock); */
1659 /* following add by Victor Yu. 09-02-2002 */
1660 if (info->IsMoxaMustChipFlag) {
1661 info->IER &= ~MOXA_MUST_RECV_ISR;
1662 outb(info->IER, info->base + UART_IER);
1663 } else {
1664 /* above add by Victor Yu. 09-02-2002 */
1665 info->x_char = STOP_CHAR(tty);
1666 /* mask by Victor Yu. 09-02-2002 */
1667 /* outb(info->IER, 0); */
1668 outb(0, info->base + UART_IER);
1669 info->IER |= UART_IER_THRI;
1670 /* force Tx interrupt */
1671 outb(info->IER, info->base + UART_IER);
1672 } /* add by Victor Yu. 09-02-2002 */
1673 /* MX_UNLOCK(&info->slock); */
1674 }
1675
1676 if (info->tty->termios->c_cflag & CRTSCTS) {
1677 /* MX_LOCK(&info->slock); */
1678 info->MCR &= ~UART_MCR_RTS;
1679 outb(info->MCR, info->base + UART_MCR);
1680 /* MX_UNLOCK(&info->slock); */
1681 }
1682 }
1683
1684 static void mxser_startrx(struct tty_struct *tty)
1685 {
1686 struct mxser_struct *info = tty->driver_data;
1687 /* unsigned long flags; */
1688
1689 info->ldisc_stop_rx = 0;
1690 if (I_IXOFF(tty)) {
1691 if (info->x_char)
1692 info->x_char = 0;
1693 else {
1694 /* MX_LOCK(&info->slock); */
1695
1696 /* following add by Victor Yu. 09-02-2002 */
1697 if (info->IsMoxaMustChipFlag) {
1698 info->IER |= MOXA_MUST_RECV_ISR;
1699 outb(info->IER, info->base + UART_IER);
1700 } else {
1701 /* above add by Victor Yu. 09-02-2002 */
1702
1703 info->x_char = START_CHAR(tty);
1704 /* mask by Victor Yu. 09-02-2002 */
1705 /* outb(info->IER, 0); */
1706 /* add by Victor Yu. 09-02-2002 */
1707 outb(0, info->base + UART_IER);
1708 /* force Tx interrupt */
1709 info->IER |= UART_IER_THRI;
1710 outb(info->IER, info->base + UART_IER);
1711 } /* add by Victor Yu. 09-02-2002 */
1712 /* MX_UNLOCK(&info->slock); */
1713 }
1714 }
1715
1716 if (info->tty->termios->c_cflag & CRTSCTS) {
1717 /* MX_LOCK(&info->slock); */
1718 info->MCR |= UART_MCR_RTS;
1719 outb(info->MCR, info->base + UART_MCR);
1720 /* MX_UNLOCK(&info->slock); */
1721 }
1722 }
1723
1724 /*
1725 * This routine is called by the upper-layer tty layer to signal that
1726 * incoming characters should be throttled.
1727 */
1728 static void mxser_throttle(struct tty_struct *tty)
1729 {
1730 /* struct mxser_struct *info = tty->driver_data; */
1731 /* unsigned long flags; */
1732
1733 /* MX_LOCK(&info->slock); */
1734 mxser_stoprx(tty);
1735 /* MX_UNLOCK(&info->slock); */
1736 }
1737
1738 static void mxser_unthrottle(struct tty_struct *tty)
1739 {
1740 /* struct mxser_struct *info = tty->driver_data; */
1741 /* unsigned long flags; */
1742
1743 /* MX_LOCK(&info->slock); */
1744 mxser_startrx(tty);
1745 /* MX_UNLOCK(&info->slock); */
1746 }
1747
1748 static void mxser_set_termios(struct tty_struct *tty, struct termios *old_termios)
1749 {
1750 struct mxser_struct *info = tty->driver_data;
1751 unsigned long flags;
1752
1753 if ((tty->termios->c_cflag != old_termios->c_cflag) ||
1754 (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
1755
1756 mxser_change_speed(info, old_termios);
1757
1758 if ((old_termios->c_cflag & CRTSCTS) &&
1759 !(tty->termios->c_cflag & CRTSCTS)) {
1760 tty->hw_stopped = 0;
1761 mxser_start(tty);
1762 }
1763 }
1764
1765 /* Handle sw stopped */
1766 if ((old_termios->c_iflag & IXON) &&
1767 !(tty->termios->c_iflag & IXON)) {
1768 tty->stopped = 0;
1769
1770 /* following add by Victor Yu. 09-02-2002 */
1771 if (info->IsMoxaMustChipFlag) {
1772 spin_lock_irqsave(&info->slock, flags);
1773 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
1774 spin_unlock_irqrestore(&info->slock, flags);
1775 }
1776 /* above add by Victor Yu. 09-02-2002 */
1777
1778 mxser_start(tty);
1779 }
1780 }
1781
1782 /*
1783 * mxser_stop() and mxser_start()
1784 *
1785 * This routines are called before setting or resetting tty->stopped.
1786 * They enable or disable transmitter interrupts, as necessary.
1787 */
1788 static void mxser_stop(struct tty_struct *tty)
1789 {
1790 struct mxser_struct *info = tty->driver_data;
1791 unsigned long flags;
1792
1793 spin_lock_irqsave(&info->slock, flags);
1794 if (info->IER & UART_IER_THRI) {
1795 info->IER &= ~UART_IER_THRI;
1796 outb(info->IER, info->base + UART_IER);
1797 }
1798 spin_unlock_irqrestore(&info->slock, flags);
1799 }
1800
1801 static void mxser_start(struct tty_struct *tty)
1802 {
1803 struct mxser_struct *info = tty->driver_data;
1804 unsigned long flags;
1805
1806 spin_lock_irqsave(&info->slock, flags);
1807 if (info->xmit_cnt && info->xmit_buf && !(info->IER & UART_IER_THRI)) {
1808 info->IER |= UART_IER_THRI;
1809 outb(info->IER, info->base + UART_IER);
1810 }
1811 spin_unlock_irqrestore(&info->slock, flags);
1812 }
1813
1814 /*
1815 * mxser_wait_until_sent() --- wait until the transmitter is empty
1816 */
1817 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1818 {
1819 struct mxser_struct *info = tty->driver_data;
1820 unsigned long orig_jiffies, char_time;
1821 int lsr;
1822
1823 if (info->type == PORT_UNKNOWN)
1824 return;
1825
1826 if (info->xmit_fifo_size == 0)
1827 return; /* Just in case.... */
1828
1829 orig_jiffies = jiffies;
1830 /*
1831 * Set the check interval to be 1/5 of the estimated time to
1832 * send a single character, and make it at least 1. The check
1833 * interval should also be less than the timeout.
1834 *
1835 * Note: we have to use pretty tight timings here to satisfy
1836 * the NIST-PCTS.
1837 */
1838 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1839 char_time = char_time / 5;
1840 if (char_time == 0)
1841 char_time = 1;
1842 if (timeout && timeout < char_time)
1843 char_time = timeout;
1844 /*
1845 * If the transmitter hasn't cleared in twice the approximate
1846 * amount of time to send the entire FIFO, it probably won't
1847 * ever clear. This assumes the UART isn't doing flow
1848 * control, which is currently the case. Hence, if it ever
1849 * takes longer than info->timeout, this is probably due to a
1850 * UART bug of some kind. So, we clamp the timeout parameter at
1851 * 2*info->timeout.
1852 */
1853 if (!timeout || timeout > 2 * info->timeout)
1854 timeout = 2 * info->timeout;
1855 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1856 printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
1857 timeout, char_time);
1858 printk("jiff=%lu...", jiffies);
1859 #endif
1860 while (!((lsr = inb(info->base + UART_LSR)) & UART_LSR_TEMT)) {
1861 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1862 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1863 #endif
1864 schedule_timeout_interruptible(char_time);
1865 if (signal_pending(current))
1866 break;
1867 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1868 break;
1869 }
1870 set_current_state(TASK_RUNNING);
1871
1872 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1873 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1874 #endif
1875 }
1876
1877
1878 /*
1879 * This routine is called by tty_hangup() when a hangup is signaled.
1880 */
1881 void mxser_hangup(struct tty_struct *tty)
1882 {
1883 struct mxser_struct *info = tty->driver_data;
1884
1885 mxser_flush_buffer(tty);
1886 mxser_shutdown(info);
1887 info->event = 0;
1888 info->count = 0;
1889 info->flags &= ~ASYNC_NORMAL_ACTIVE;
1890 info->tty = NULL;
1891 wake_up_interruptible(&info->open_wait);
1892 }
1893
1894
1895 /* added by James 03-12-2004. */
1896 /*
1897 * mxser_rs_break() --- routine which turns the break handling on or off
1898 */
1899 static void mxser_rs_break(struct tty_struct *tty, int break_state)
1900 {
1901 struct mxser_struct *info = tty->driver_data;
1902 unsigned long flags;
1903
1904 spin_lock_irqsave(&info->slock, flags);
1905 if (break_state == -1)
1906 outb(inb(info->base + UART_LCR) | UART_LCR_SBC,
1907 info->base + UART_LCR);
1908 else
1909 outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC,
1910 info->base + UART_LCR);
1911 spin_unlock_irqrestore(&info->slock, flags);
1912 }
1913
1914 /* (above) added by James. */
1915
1916
1917 /*
1918 * This is the serial driver's generic interrupt routine
1919 */
1920 static irqreturn_t mxser_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1921 {
1922 int status, iir, i;
1923 struct mxser_struct *info;
1924 struct mxser_struct *port;
1925 int max, irqbits, bits, msr;
1926 int pass_counter = 0;
1927 int handled = IRQ_NONE;
1928
1929 port = NULL;
1930 /* spin_lock(&gm_lock); */
1931
1932 for (i = 0; i < MXSER_BOARDS; i++) {
1933 if (dev_id == &(mxvar_table[i * MXSER_PORTS_PER_BOARD])) {
1934 port = dev_id;
1935 break;
1936 }
1937 }
1938
1939 if (i == MXSER_BOARDS)
1940 goto irq_stop;
1941 if (port == 0)
1942 goto irq_stop;
1943 max = mxser_numports[mxsercfg[i].board_type - 1];
1944 while (1) {
1945 irqbits = inb(port->vector) & port->vectormask;
1946 if (irqbits == port->vectormask)
1947 break;
1948
1949 handled = IRQ_HANDLED;
1950 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
1951 if (irqbits == port->vectormask)
1952 break;
1953 if (bits & irqbits)
1954 continue;
1955 info = port + i;
1956
1957 /* following add by Victor Yu. 09-13-2002 */
1958 iir = inb(info->base + UART_IIR);
1959 if (iir & UART_IIR_NO_INT)
1960 continue;
1961 iir &= MOXA_MUST_IIR_MASK;
1962 if (!info->tty) {
1963 status = inb(info->base + UART_LSR);
1964 outb(0x27, info->base + UART_FCR);
1965 inb(info->base + UART_MSR);
1966 continue;
1967 }
1968 /* above add by Victor Yu. 09-13-2002 */
1969 /*
1970 if (info->tty->flip.count < TTY_FLIPBUF_SIZE / 4) {
1971 info->IER |= MOXA_MUST_RECV_ISR;
1972 outb(info->IER, info->base + UART_IER);
1973 }
1974 */
1975
1976
1977 /* mask by Victor Yu. 09-13-2002
1978 if ( !info->tty ||
1979 (inb(info->base + UART_IIR) & UART_IIR_NO_INT) )
1980 continue;
1981 */
1982 /* mask by Victor Yu. 09-02-2002
1983 status = inb(info->base + UART_LSR) & info->read_status_mask;
1984 */
1985
1986 /* following add by Victor Yu. 09-02-2002 */
1987 status = inb(info->base + UART_LSR);
1988
1989 if (status & UART_LSR_PE)
1990 info->err_shadow |= NPPI_NOTIFY_PARITY;
1991 if (status & UART_LSR_FE)
1992 info->err_shadow |= NPPI_NOTIFY_FRAMING;
1993 if (status & UART_LSR_OE)
1994 info->err_shadow |= NPPI_NOTIFY_HW_OVERRUN;
1995 if (status & UART_LSR_BI)
1996 info->err_shadow |= NPPI_NOTIFY_BREAK;
1997
1998 if (info->IsMoxaMustChipFlag) {
1999 /*
2000 if ( (status & 0x02) && !(status & 0x01) ) {
2001 outb(info->base+UART_FCR, 0x23);
2002 continue;
2003 }
2004 */
2005 if (iir == MOXA_MUST_IIR_GDA ||
2006 iir == MOXA_MUST_IIR_RDA ||
2007 iir == MOXA_MUST_IIR_RTO ||
2008 iir == MOXA_MUST_IIR_LSR)
2009 mxser_receive_chars(info, &status);
2010
2011 } else {
2012 /* above add by Victor Yu. 09-02-2002 */
2013
2014 status &= info->read_status_mask;
2015 if (status & UART_LSR_DR)
2016 mxser_receive_chars(info, &status);
2017 }
2018 msr = inb(info->base + UART_MSR);
2019 if (msr & UART_MSR_ANY_DELTA) {
2020 mxser_check_modem_status(info, msr);
2021 }
2022 /* following add by Victor Yu. 09-13-2002 */
2023 if (info->IsMoxaMustChipFlag) {
2024 if ((iir == 0x02) && (status & UART_LSR_THRE)) {
2025 mxser_transmit_chars(info);
2026 }
2027 } else {
2028 /* above add by Victor Yu. 09-13-2002 */
2029
2030 if (status & UART_LSR_THRE) {
2031 /* 8-2-99 by William
2032 if ( info->x_char || (info->xmit_cnt > 0) )
2033 */
2034 mxser_transmit_chars(info);
2035 }
2036 }
2037 }
2038 if (pass_counter++ > MXSER_ISR_PASS_LIMIT) {
2039 break; /* Prevent infinite loops */
2040 }
2041 }
2042
2043 irq_stop:
2044 /* spin_unlock(&gm_lock); */
2045 return handled;
2046 }
2047
2048 static void mxser_receive_chars(struct mxser_struct *info, int *status)
2049 {
2050 struct tty_struct *tty = info->tty;
2051 unsigned char ch, gdl;
2052 int ignored = 0;
2053 int cnt = 0;
2054 int recv_room;
2055 int max = 256;
2056 unsigned long flags;
2057
2058 spin_lock_irqsave(&info->slock, flags);
2059
2060 recv_room = tty->receive_room;
2061 if ((recv_room == 0) && (!info->ldisc_stop_rx)) {
2062 /* mxser_throttle(tty); */
2063 mxser_stoprx(tty);
2064 /* return; */
2065 }
2066
2067 /* following add by Victor Yu. 09-02-2002 */
2068 if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
2069
2070 if (*status & UART_LSR_SPECIAL) {
2071 goto intr_old;
2072 }
2073 /* following add by Victor Yu. 02-11-2004 */
2074 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID &&
2075 (*status & MOXA_MUST_LSR_RERR))
2076 goto intr_old;
2077 /* above add by Victor Yu. 02-14-2004 */
2078 if (*status & MOXA_MUST_LSR_RERR)
2079 goto intr_old;
2080
2081 gdl = inb(info->base + MOXA_MUST_GDL_REGISTER);
2082
2083 /* add by Victor Yu. 02-11-2004 */
2084 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU150_HWID)
2085 gdl &= MOXA_MUST_GDL_MASK;
2086 if (gdl >= recv_room) {
2087 if (!info->ldisc_stop_rx) {
2088 /* mxser_throttle(tty); */
2089 mxser_stoprx(tty);
2090 }
2091 /* return; */
2092 }
2093 while (gdl--) {
2094 ch = inb(info->base + UART_RX);
2095 tty_insert_flip_char(tty, ch, 0);
2096 cnt++;
2097 /*
2098 if ((cnt >= HI_WATER) && (info->stop_rx == 0)) {
2099 mxser_stoprx(tty);
2100 info->stop_rx = 1;
2101 break;
2102 } */
2103 }
2104 goto end_intr;
2105 }
2106 intr_old:
2107 /* above add by Victor Yu. 09-02-2002 */
2108
2109 do {
2110 if (max-- < 0)
2111 break;
2112 /*
2113 if ((cnt >= HI_WATER) && (info->stop_rx == 0)) {
2114 mxser_stoprx(tty);
2115 info->stop_rx=1;
2116 break;
2117 }
2118 */
2119
2120 ch = inb(info->base + UART_RX);
2121 /* following add by Victor Yu. 09-02-2002 */
2122 if (info->IsMoxaMustChipFlag && (*status & UART_LSR_OE) /*&& !(*status&UART_LSR_DR) */ )
2123 outb(0x23, info->base + UART_FCR);
2124 *status &= info->read_status_mask;
2125 /* above add by Victor Yu. 09-02-2002 */
2126 if (*status & info->ignore_status_mask) {
2127 if (++ignored > 100)
2128 break;
2129 } else {
2130 char flag = 0;
2131 if (*status & UART_LSR_SPECIAL) {
2132 if (*status & UART_LSR_BI) {
2133 flag = TTY_BREAK;
2134 /* added by casper 1/11/2000 */
2135 info->icount.brk++;
2136 /* */
2137 if (info->flags & ASYNC_SAK)
2138 do_SAK(tty);
2139 } else if (*status & UART_LSR_PE) {
2140 flag = TTY_PARITY;
2141 /* added by casper 1/11/2000 */
2142 info->icount.parity++;
2143 /* */
2144 } else if (*status & UART_LSR_FE) {
2145 flag = TTY_FRAME;
2146 /* added by casper 1/11/2000 */
2147 info->icount.frame++;
2148 /* */
2149 } else if (*status & UART_LSR_OE) {
2150 flag = TTY_OVERRUN;
2151 /* added by casper 1/11/2000 */
2152 info->icount.overrun++;
2153 /* */
2154 }
2155 }
2156 tty_insert_flip_char(tty, ch, flag);
2157 cnt++;
2158 if (cnt >= recv_room) {
2159 if (!info->ldisc_stop_rx) {
2160 /* mxser_throttle(tty); */
2161 mxser_stoprx(tty);
2162 }
2163 break;
2164 }
2165
2166 }
2167
2168 /* following add by Victor Yu. 09-02-2002 */
2169 if (info->IsMoxaMustChipFlag)
2170 break;
2171 /* above add by Victor Yu. 09-02-2002 */
2172
2173 /* mask by Victor Yu. 09-02-2002
2174 *status = inb(info->base + UART_LSR) & info->read_status_mask;
2175 */
2176 /* following add by Victor Yu. 09-02-2002 */
2177 *status = inb(info->base + UART_LSR);
2178 /* above add by Victor Yu. 09-02-2002 */
2179 } while (*status & UART_LSR_DR);
2180
2181 end_intr: /* add by Victor Yu. 09-02-2002 */
2182 mxvar_log.rxcnt[info->port] += cnt;
2183 info->mon_data.rxcnt += cnt;
2184 info->mon_data.up_rxcnt += cnt;
2185 spin_unlock_irqrestore(&info->slock, flags);
2186
2187 tty_flip_buffer_push(tty);
2188 }
2189
2190 static void mxser_transmit_chars(struct mxser_struct *info)
2191 {
2192 int count, cnt;
2193 unsigned long flags;
2194
2195 spin_lock_irqsave(&info->slock, flags);
2196
2197 if (info->x_char) {
2198 outb(info->x_char, info->base + UART_TX);
2199 info->x_char = 0;
2200 mxvar_log.txcnt[info->port]++;
2201 info->mon_data.txcnt++;
2202 info->mon_data.up_txcnt++;
2203
2204 /* added by casper 1/11/2000 */
2205 info->icount.tx++;
2206 /* */
2207 spin_unlock_irqrestore(&info->slock, flags);
2208 return;
2209 }
2210
2211 if (info->xmit_buf == 0) {
2212 spin_unlock_irqrestore(&info->slock, flags);
2213 return;
2214 }
2215
2216 if ((info->xmit_cnt <= 0) || info->tty->stopped ||
2217 (info->tty->hw_stopped &&
2218 (info->type != PORT_16550A) &&
2219 (!info->IsMoxaMustChipFlag))) {
2220 info->IER &= ~UART_IER_THRI;
2221 outb(info->IER, info->base + UART_IER);
2222 spin_unlock_irqrestore(&info->slock, flags);
2223 return;
2224 }
2225
2226 cnt = info->xmit_cnt;
2227 count = info->xmit_fifo_size;
2228 do {
2229 outb(info->xmit_buf[info->xmit_tail++],
2230 info->base + UART_TX);
2231 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2232 if (--info->xmit_cnt <= 0)
2233 break;
2234 } while (--count > 0);
2235 mxvar_log.txcnt[info->port] += (cnt - info->xmit_cnt);
2236
2237 /* added by James 03-12-2004. */
2238 info->mon_data.txcnt += (cnt - info->xmit_cnt);
2239 info->mon_data.up_txcnt += (cnt - info->xmit_cnt);
2240 /* (above) added by James. */
2241
2242 /* added by casper 1/11/2000 */
2243 info->icount.tx += (cnt - info->xmit_cnt);
2244 /* */
2245
2246 if (info->xmit_cnt < WAKEUP_CHARS) {
2247 set_bit(MXSER_EVENT_TXLOW, &info->event);
2248 schedule_work(&info->tqueue);
2249 }
2250 if (info->xmit_cnt <= 0) {
2251 info->IER &= ~UART_IER_THRI;
2252 outb(info->IER, info->base + UART_IER);
2253 }
2254 spin_unlock_irqrestore(&info->slock, flags);
2255 }
2256
2257 static void mxser_check_modem_status(struct mxser_struct *info, int status)
2258 {
2259 /* update input line counters */
2260 if (status & UART_MSR_TERI)
2261 info->icount.rng++;
2262 if (status & UART_MSR_DDSR)
2263 info->icount.dsr++;
2264 if (status & UART_MSR_DDCD)
2265 info->icount.dcd++;
2266 if (status & UART_MSR_DCTS)
2267 info->icount.cts++;
2268 info->mon_data.modem_status = status;
2269 wake_up_interruptible(&info->delta_msr_wait);
2270
2271 if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
2272 if (status & UART_MSR_DCD)
2273 wake_up_interruptible(&info->open_wait);
2274 schedule_work(&info->tqueue);
2275 }
2276
2277 if (info->flags & ASYNC_CTS_FLOW) {
2278 if (info->tty->hw_stopped) {
2279 if (status & UART_MSR_CTS) {
2280 info->tty->hw_stopped = 0;
2281
2282 if ((info->type != PORT_16550A) &&
2283 (!info->IsMoxaMustChipFlag)) {
2284 info->IER |= UART_IER_THRI;
2285 outb(info->IER, info->base + UART_IER);
2286 }
2287 set_bit(MXSER_EVENT_TXLOW, &info->event);
2288 schedule_work(&info->tqueue); }
2289 } else {
2290 if (!(status & UART_MSR_CTS)) {
2291 info->tty->hw_stopped = 1;
2292 if ((info->type != PORT_16550A) &&
2293 (!info->IsMoxaMustChipFlag)) {
2294 info->IER &= ~UART_IER_THRI;
2295 outb(info->IER, info->base + UART_IER);
2296 }
2297 }
2298 }
2299 }
2300 }
2301
2302 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, struct mxser_struct *info)
2303 {
2304 DECLARE_WAITQUEUE(wait, current);
2305 int retval;
2306 int do_clocal = 0;
2307 unsigned long flags;
2308
2309 /*
2310 * If non-blocking mode is set, or the port is not enabled,
2311 * then make the check up front and then exit.
2312 */
2313 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2314 info->flags |= ASYNC_NORMAL_ACTIVE;
2315 return 0;
2316 }
2317
2318 if (tty->termios->c_cflag & CLOCAL)
2319 do_clocal = 1;
2320
2321 /*
2322 * Block waiting for the carrier detect and the line to become
2323 * free (i.e., not in use by the callout). While we are in
2324 * this loop, info->count is dropped by one, so that
2325 * mxser_close() knows when to free things. We restore it upon
2326 * exit, either normal or abnormal.
2327 */
2328 retval = 0;
2329 add_wait_queue(&info->open_wait, &wait);
2330
2331 spin_lock_irqsave(&info->slock, flags);
2332 if (!tty_hung_up_p(filp))
2333 info->count--;
2334 spin_unlock_irqrestore(&info->slock, flags);
2335 info->blocked_open++;
2336 while (1) {
2337 spin_lock_irqsave(&info->slock, flags);
2338 outb(inb(info->base + UART_MCR) |
2339 UART_MCR_DTR | UART_MCR_RTS, info->base + UART_MCR);
2340 spin_unlock_irqrestore(&info->slock, flags);
2341 set_current_state(TASK_INTERRUPTIBLE);
2342 if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)) {
2343 if (info->flags & ASYNC_HUP_NOTIFY)
2344 retval = -EAGAIN;
2345 else
2346 retval = -ERESTARTSYS;
2347 break;
2348 }
2349 if (!(info->flags & ASYNC_CLOSING) &&
2350 (do_clocal ||
2351 (inb(info->base + UART_MSR) & UART_MSR_DCD)))
2352 break;
2353 if (signal_pending(current)) {
2354 retval = -ERESTARTSYS;
2355 break;
2356 }
2357 schedule();
2358 }
2359 set_current_state(TASK_RUNNING);
2360 remove_wait_queue(&info->open_wait, &wait);
2361 if (!tty_hung_up_p(filp))
2362 info->count++;
2363 info->blocked_open--;
2364 if (retval)
2365 return retval;
2366 info->flags |= ASYNC_NORMAL_ACTIVE;
2367 return 0;
2368 }
2369
2370 static int mxser_startup(struct mxser_struct *info)
2371 {
2372 unsigned long page;
2373 unsigned long flags;
2374
2375 page = __get_free_page(GFP_KERNEL);
2376 if (!page)
2377 return -ENOMEM;
2378
2379 spin_lock_irqsave(&info->slock, flags);
2380
2381 if (info->flags & ASYNC_INITIALIZED) {
2382 free_page(page);
2383 spin_unlock_irqrestore(&info->slock, flags);
2384 return 0;
2385 }
2386
2387 if (!info->base || !info->type) {
2388 if (info->tty)
2389 set_bit(TTY_IO_ERROR, &info->tty->flags);
2390 free_page(page);
2391 spin_unlock_irqrestore(&info->slock, flags);
2392 return 0;
2393 }
2394 if (info->xmit_buf)
2395 free_page(page);
2396 else
2397 info->xmit_buf = (unsigned char *) page;
2398
2399 /*
2400 * Clear the FIFO buffers and disable them
2401 * (they will be reenabled in mxser_change_speed())
2402 */
2403 if (info->IsMoxaMustChipFlag)
2404 outb((UART_FCR_CLEAR_RCVR |
2405 UART_FCR_CLEAR_XMIT |
2406 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2407 else
2408 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
2409 info->base + UART_FCR);
2410
2411 /*
2412 * At this point there's no way the LSR could still be 0xFF;
2413 * if it is, then bail out, because there's likely no UART
2414 * here.
2415 */
2416 if (inb(info->base + UART_LSR) == 0xff) {
2417 spin_unlock_irqrestore(&info->slock, flags);
2418 if (capable(CAP_SYS_ADMIN)) {
2419 if (info->tty)
2420 set_bit(TTY_IO_ERROR, &info->tty->flags);
2421 return 0;
2422 } else
2423 return -ENODEV;
2424 }
2425
2426 /*
2427 * Clear the interrupt registers.
2428 */
2429 (void) inb(info->base + UART_LSR);
2430 (void) inb(info->base + UART_RX);
2431 (void) inb(info->base + UART_IIR);
2432 (void) inb(info->base + UART_MSR);
2433
2434 /*
2435 * Now, initialize the UART
2436 */
2437 outb(UART_LCR_WLEN8, info->base + UART_LCR); /* reset DLAB */
2438 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
2439 outb(info->MCR, info->base + UART_MCR);
2440
2441 /*
2442 * Finally, enable interrupts
2443 */
2444 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
2445 /* info->IER = UART_IER_RLSI | UART_IER_RDI; */
2446
2447 /* following add by Victor Yu. 08-30-2002 */
2448 if (info->IsMoxaMustChipFlag)
2449 info->IER |= MOXA_MUST_IER_EGDAI;
2450 /* above add by Victor Yu. 08-30-2002 */
2451 outb(info->IER, info->base + UART_IER); /* enable interrupts */
2452
2453 /*
2454 * And clear the interrupt registers again for luck.
2455 */
2456 (void) inb(info->base + UART_LSR);
2457 (void) inb(info->base + UART_RX);
2458 (void) inb(info->base + UART_IIR);
2459 (void) inb(info->base + UART_MSR);
2460
2461 if (info->tty)
2462 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2463 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2464
2465 /*
2466 * and set the speed of the serial port
2467 */
2468 spin_unlock_irqrestore(&info->slock, flags);
2469 mxser_change_speed(info, NULL);
2470
2471 info->flags |= ASYNC_INITIALIZED;
2472 return 0;
2473 }
2474
2475 /*
2476 * This routine will shutdown a serial port; interrupts maybe disabled, and
2477 * DTR is dropped if the hangup on close termio flag is on.
2478 */
2479 static void mxser_shutdown(struct mxser_struct *info)
2480 {
2481 unsigned long flags;
2482
2483 if (!(info->flags & ASYNC_INITIALIZED))
2484 return;
2485
2486 spin_lock_irqsave(&info->slock, flags);
2487
2488 /*
2489 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
2490 * here so the queue might never be waken up
2491 */
2492 wake_up_interruptible(&info->delta_msr_wait);
2493
2494 /*
2495 * Free the IRQ, if necessary
2496 */
2497 if (info->xmit_buf) {
2498 free_page((unsigned long) info->xmit_buf);
2499 info->xmit_buf = NULL;
2500 }
2501
2502 info->IER = 0;
2503 outb(0x00, info->base + UART_IER);
2504
2505 if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
2506 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
2507 outb(info->MCR, info->base + UART_MCR);
2508
2509 /* clear Rx/Tx FIFO's */
2510 /* following add by Victor Yu. 08-30-2002 */
2511 if (info->IsMoxaMustChipFlag)
2512 outb((UART_FCR_CLEAR_RCVR |
2513 UART_FCR_CLEAR_XMIT |
2514 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2515 else
2516 /* above add by Victor Yu. 08-30-2002 */
2517 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
2518 info->base + UART_FCR);
2519
2520 /* read data port to reset things */
2521 (void) inb(info->base + UART_RX);
2522
2523 if (info->tty)
2524 set_bit(TTY_IO_ERROR, &info->tty->flags);
2525
2526 info->flags &= ~ASYNC_INITIALIZED;
2527
2528 /* following add by Victor Yu. 09-23-2002 */
2529 if (info->IsMoxaMustChipFlag)
2530 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->base);
2531 /* above add by Victor Yu. 09-23-2002 */
2532
2533 spin_unlock_irqrestore(&info->slock, flags);
2534 }
2535
2536 /*
2537 * This routine is called to set the UART divisor registers to match
2538 * the specified baud rate for a serial port.
2539 */
2540 static int mxser_change_speed(struct mxser_struct *info, struct termios *old_termios)
2541 {
2542 unsigned cflag, cval, fcr;
2543 int ret = 0;
2544 unsigned char status;
2545 long baud;
2546 unsigned long flags;
2547
2548 if (!info->tty || !info->tty->termios)
2549 return ret;
2550 cflag = info->tty->termios->c_cflag;
2551 if (!(info->base))
2552 return ret;
2553
2554 #ifndef B921600
2555 #define B921600 (B460800 +1)
2556 #endif
2557 if (mxser_set_baud_method[info->port] == 0) {
2558 switch (cflag & (CBAUD | CBAUDEX)) {
2559 case B921600:
2560 baud = 921600;
2561 break;
2562 case B460800:
2563 baud = 460800;
2564 break;
2565 case B230400:
2566 baud = 230400;
2567 break;
2568 case B115200:
2569 baud = 115200;
2570 break;
2571 case B57600:
2572 baud = 57600;
2573 break;
2574 case B38400:
2575 baud = 38400;
2576 break;
2577 case B19200:
2578 baud = 19200;
2579 break;
2580 case B9600:
2581 baud = 9600;
2582 break;
2583 case B4800:
2584 baud = 4800;
2585 break;
2586 case B2400:
2587 baud = 2400;
2588 break;
2589 case B1800:
2590 baud = 1800;
2591 break;
2592 case B1200:
2593 baud = 1200;
2594 break;
2595 case B600:
2596 baud = 600;
2597 break;
2598 case B300:
2599 baud = 300;
2600 break;
2601 case B200:
2602 baud = 200;
2603 break;
2604 case B150:
2605 baud = 150;
2606 break;
2607 case B134:
2608 baud = 134;
2609 break;
2610 case B110:
2611 baud = 110;
2612 break;
2613 case B75:
2614 baud = 75;
2615 break;
2616 case B50:
2617 baud = 50;
2618 break;
2619 default:
2620 baud = 0;
2621 break;
2622 }
2623 mxser_set_baud(info, baud);
2624 }
2625
2626 /* byte size and parity */
2627 switch (cflag & CSIZE) {
2628 case CS5:
2629 cval = 0x00;
2630 break;
2631 case CS6:
2632 cval = 0x01;
2633 break;
2634 case CS7:
2635 cval = 0x02;
2636 break;
2637 case CS8:
2638 cval = 0x03;
2639 break;
2640 default:
2641 cval = 0x00;
2642 break; /* too keep GCC shut... */
2643 }
2644 if (cflag & CSTOPB)
2645 cval |= 0x04;
2646 if (cflag & PARENB)
2647 cval |= UART_LCR_PARITY;
2648 if (!(cflag & PARODD))
2649 cval |= UART_LCR_EPAR;
2650 if (cflag & CMSPAR)
2651 cval |= UART_LCR_SPAR;
2652
2653 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
2654 if (info->IsMoxaMustChipFlag) {
2655 fcr = UART_FCR_ENABLE_FIFO;
2656 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2657 SET_MOXA_MUST_FIFO_VALUE(info);
2658 } else
2659 fcr = 0;
2660 } else {
2661 fcr = UART_FCR_ENABLE_FIFO;
2662 /* following add by Victor Yu. 08-30-2002 */
2663 if (info->IsMoxaMustChipFlag) {
2664 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2665 SET_MOXA_MUST_FIFO_VALUE(info);
2666 } else {
2667 /* above add by Victor Yu. 08-30-2002 */
2668 switch (info->rx_trigger) {
2669 case 1:
2670 fcr |= UART_FCR_TRIGGER_1;
2671 break;
2672 case 4:
2673 fcr |= UART_FCR_TRIGGER_4;
2674 break;
2675 case 8:
2676 fcr |= UART_FCR_TRIGGER_8;
2677 break;
2678 default:
2679 fcr |= UART_FCR_TRIGGER_14;
2680 break;
2681 }
2682 }
2683 }
2684
2685 /* CTS flow control flag and modem status interrupts */
2686 info->IER &= ~UART_IER_MSI;
2687 info->MCR &= ~UART_MCR_AFE;
2688 if (cflag & CRTSCTS) {
2689 info->flags |= ASYNC_CTS_FLOW;
2690 info->IER |= UART_IER_MSI;
2691 if ((info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
2692 info->MCR |= UART_MCR_AFE;
2693 /* status = mxser_get_msr(info->base, 0, info->port); */
2694 /*
2695 save_flags(flags);
2696 cli();
2697 status = inb(baseaddr + UART_MSR);
2698 restore_flags(flags);
2699 */
2700 /* mxser_check_modem_status(info, status); */
2701 } else {
2702 /* status = mxser_get_msr(info->base, 0, info->port); */
2703 /* MX_LOCK(&info->slock); */
2704 status = inb(info->base + UART_MSR);
2705 /* MX_UNLOCK(&info->slock); */
2706 if (info->tty->hw_stopped) {
2707 if (status & UART_MSR_CTS) {
2708 info->tty->hw_stopped = 0;
2709 if ((info->type != PORT_16550A) &&
2710 (!info->IsMoxaMustChipFlag)) {
2711 info->IER |= UART_IER_THRI;
2712 outb(info->IER, info->base + UART_IER);
2713 }
2714 set_bit(MXSER_EVENT_TXLOW, &info->event);
2715 schedule_work(&info->tqueue); }
2716 } else {
2717 if (!(status & UART_MSR_CTS)) {
2718 info->tty->hw_stopped = 1;
2719 if ((info->type != PORT_16550A) &&
2720 (!info->IsMoxaMustChipFlag)) {
2721 info->IER &= ~UART_IER_THRI;
2722 outb(info->IER, info->base + UART_IER);
2723 }
2724 }
2725 }
2726 }
2727 } else {
2728 info->flags &= ~ASYNC_CTS_FLOW;
2729 }
2730 outb(info->MCR, info->base + UART_MCR);
2731 if (cflag & CLOCAL) {
2732 info->flags &= ~ASYNC_CHECK_CD;
2733 } else {
2734 info->flags |= ASYNC_CHECK_CD;
2735 info->IER |= UART_IER_MSI;
2736 }
2737 outb(info->IER, info->base + UART_IER);
2738
2739 /*
2740 * Set up parity check flag
2741 */
2742 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
2743 if (I_INPCK(info->tty))
2744 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
2745 if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
2746 info->read_status_mask |= UART_LSR_BI;
2747
2748 info->ignore_status_mask = 0;
2749
2750 if (I_IGNBRK(info->tty)) {
2751 info->ignore_status_mask |= UART_LSR_BI;
2752 info->read_status_mask |= UART_LSR_BI;
2753 /*
2754 * If we're ignore parity and break indicators, ignore
2755 * overruns too. (For real raw support).
2756 */
2757 if (I_IGNPAR(info->tty)) {
2758 info->ignore_status_mask |=
2759 UART_LSR_OE |
2760 UART_LSR_PE |
2761 UART_LSR_FE;
2762 info->read_status_mask |=
2763 UART_LSR_OE |
2764 UART_LSR_PE |
2765 UART_LSR_FE;
2766 }
2767 }
2768 /* following add by Victor Yu. 09-02-2002 */
2769 if (info->IsMoxaMustChipFlag) {
2770 spin_lock_irqsave(&info->slock, flags);
2771 SET_MOXA_MUST_XON1_VALUE(info->base, START_CHAR(info->tty));
2772 SET_MOXA_MUST_XOFF1_VALUE(info->base, STOP_CHAR(info->tty));
2773 if (I_IXON(info->tty)) {
2774 ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2775 } else {
2776 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2777 }
2778 if (I_IXOFF(info->tty)) {
2779 ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2780 } else {
2781 DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2782 }
2783 /*
2784 if ( I_IXANY(info->tty) ) {
2785 info->MCR |= MOXA_MUST_MCR_XON_ANY;
2786 ENABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2787 } else {
2788 info->MCR &= ~MOXA_MUST_MCR_XON_ANY;
2789 DISABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2790 }
2791 */
2792 spin_unlock_irqrestore(&info->slock, flags);
2793 }
2794 /* above add by Victor Yu. 09-02-2002 */
2795
2796
2797 outb(fcr, info->base + UART_FCR); /* set fcr */
2798 outb(cval, info->base + UART_LCR);
2799
2800 return ret;
2801 }
2802
2803
2804 static int mxser_set_baud(struct mxser_struct *info, long newspd)
2805 {
2806 int quot = 0;
2807 unsigned char cval;
2808 int ret = 0;
2809 unsigned long flags;
2810
2811 if (!info->tty || !info->tty->termios)
2812 return ret;
2813
2814 if (!(info->base))
2815 return ret;
2816
2817 if (newspd > info->MaxCanSetBaudRate)
2818 return 0;
2819
2820 info->realbaud = newspd;
2821 if (newspd == 134) {
2822 quot = (2 * info->baud_base / 269);
2823 } else if (newspd) {
2824 quot = info->baud_base / newspd;
2825 if (quot == 0)
2826 quot = 1;
2827 } else {
2828 quot = 0;
2829 }
2830
2831 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
2832 info->timeout += HZ / 50; /* Add .02 seconds of slop */
2833
2834 if (quot) {
2835 spin_lock_irqsave(&info->slock, flags);
2836 info->MCR |= UART_MCR_DTR;
2837 outb(info->MCR, info->base + UART_MCR);
2838 spin_unlock_irqrestore(&info->slock, flags);
2839 } else {
2840 spin_lock_irqsave(&info->slock, flags);
2841 info->MCR &= ~UART_MCR_DTR;
2842 outb(info->MCR, info->base + UART_MCR);
2843 spin_unlock_irqrestore(&info->slock, flags);
2844 return ret;
2845 }
2846
2847 cval = inb(info->base + UART_LCR);
2848
2849 outb(cval | UART_LCR_DLAB, info->base + UART_LCR); /* set DLAB */
2850
2851 outb(quot & 0xff, info->base + UART_DLL); /* LS of divisor */
2852 outb(quot >> 8, info->base + UART_DLM); /* MS of divisor */
2853 outb(cval, info->base + UART_LCR); /* reset DLAB */
2854
2855
2856 return ret;
2857 }
2858
2859 /*
2860 * ------------------------------------------------------------
2861 * friends of mxser_ioctl()
2862 * ------------------------------------------------------------
2863 */
2864 static int mxser_get_serial_info(struct mxser_struct *info, struct serial_struct __user *retinfo)
2865 {
2866 struct serial_struct tmp;
2867
2868 if (!retinfo)
2869 return -EFAULT;
2870 memset(&tmp, 0, sizeof(tmp));
2871 tmp.type = info->type;
2872 tmp.line = info->port;
2873 tmp.port = info->base;
2874 tmp.irq = info->irq;
2875 tmp.flags = info->flags;
2876 tmp.baud_base = info->baud_base;
2877 tmp.close_delay = info->close_delay;
2878 tmp.closing_wait = info->closing_wait;
2879 tmp.custom_divisor = info->custom_divisor;
2880 tmp.hub6 = 0;
2881 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2882 return -EFAULT;
2883 return 0;
2884 }
2885
2886 static int mxser_set_serial_info(struct mxser_struct *info, struct serial_struct __user *new_info)
2887 {
2888 struct serial_struct new_serial;
2889 unsigned int flags;
2890 int retval = 0;
2891
2892 if (!new_info || !info->base)
2893 return -EFAULT;
2894 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2895 return -EFAULT;
2896
2897 if ((new_serial.irq != info->irq) ||
2898 (new_serial.port != info->base) ||
2899 (new_serial.custom_divisor != info->custom_divisor) ||
2900 (new_serial.baud_base != info->baud_base))
2901 return -EPERM;
2902
2903 flags = info->flags & ASYNC_SPD_MASK;
2904
2905 if (!capable(CAP_SYS_ADMIN)) {
2906 if ((new_serial.baud_base != info->baud_base) ||
2907 (new_serial.close_delay != info->close_delay) ||
2908 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
2909 return -EPERM;
2910 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
2911 (new_serial.flags & ASYNC_USR_MASK));
2912 } else {
2913 /*
2914 * OK, past this point, all the error checking has been done.
2915 * At this point, we start making changes.....
2916 */
2917 info->flags = ((info->flags & ~ASYNC_FLAGS) |
2918 (new_serial.flags & ASYNC_FLAGS));
2919 info->close_delay = new_serial.close_delay * HZ / 100;
2920 info->closing_wait = new_serial.closing_wait * HZ / 100;
2921 info->tty->low_latency =
2922 (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2923 info->tty->low_latency = 0; /* (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0; */
2924 }
2925
2926 /* added by casper, 3/17/2000, for mouse */
2927 info->type = new_serial.type;
2928
2929 process_txrx_fifo(info);
2930
2931 if (info->flags & ASYNC_INITIALIZED) {
2932 if (flags != (info->flags & ASYNC_SPD_MASK)) {
2933 mxser_change_speed(info, NULL);
2934 }
2935 } else {
2936 retval = mxser_startup(info);
2937 }
2938 return retval;
2939 }
2940
2941 /*
2942 * mxser_get_lsr_info - get line status register info
2943 *
2944 * Purpose: Let user call ioctl() to get info when the UART physically
2945 * is emptied. On bus types like RS485, the transmitter must
2946 * release the bus after transmitting. This must be done when
2947 * the transmit shift register is empty, not be done when the
2948 * transmit holding register is empty. This functionality
2949 * allows an RS485 driver to be written in user space.
2950 */
2951 static int mxser_get_lsr_info(struct mxser_struct *info, unsigned int __user *value)
2952 {
2953 unsigned char status;
2954 unsigned int result;
2955 unsigned long flags;
2956
2957 spin_lock_irqsave(&info->slock, flags);
2958 status = inb(info->base + UART_LSR);
2959 spin_unlock_irqrestore(&info->slock, flags);
2960 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
2961 return put_user(result, value);
2962 }
2963
2964 /*
2965 * This routine sends a break character out the serial port.
2966 */
2967 static void mxser_send_break(struct mxser_struct *info, int duration)
2968 {
2969 unsigned long flags;
2970
2971 if (!info->base)
2972 return;
2973 set_current_state(TASK_INTERRUPTIBLE);
2974 spin_lock_irqsave(&info->slock, flags);
2975 outb(inb(info->base + UART_LCR) | UART_LCR_SBC,
2976 info->base + UART_LCR);
2977 spin_unlock_irqrestore(&info->slock, flags);
2978 schedule_timeout(duration);
2979 spin_lock_irqsave(&info->slock, flags);
2980 outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC,
2981 info->base + UART_LCR);
2982 spin_unlock_irqrestore(&info->slock, flags);
2983 }
2984
2985 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
2986 {
2987 struct mxser_struct *info = tty->driver_data;
2988 unsigned char control, status;
2989 unsigned long flags;
2990
2991
2992 if (tty->index == MXSER_PORTS)
2993 return -ENOIOCTLCMD;
2994 if (tty->flags & (1 << TTY_IO_ERROR))
2995 return -EIO;
2996
2997 control = info->MCR;
2998
2999 spin_lock_irqsave(&info->slock, flags);
3000 status = inb(info->base + UART_MSR);
3001 if (status & UART_MSR_ANY_DELTA)
3002 mxser_check_modem_status(info, status);
3003 spin_unlock_irqrestore(&info->slock, flags);
3004 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
3005 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
3006 ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
3007 ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
3008 ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
3009 ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
3010 }
3011
3012 static int mxser_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear)
3013 {
3014 struct mxser_struct *info = tty->driver_data;
3015 unsigned long flags;
3016
3017
3018 if (tty->index == MXSER_PORTS)
3019 return -ENOIOCTLCMD;
3020 if (tty->flags & (1 << TTY_IO_ERROR))
3021 return -EIO;
3022
3023 spin_lock_irqsave(&info->slock, flags);
3024
3025 if (set & TIOCM_RTS)
3026 info->MCR |= UART_MCR_RTS;
3027 if (set & TIOCM_DTR)
3028 info->MCR |= UART_MCR_DTR;
3029
3030 if (clear & TIOCM_RTS)
3031 info->MCR &= ~UART_MCR_RTS;
3032 if (clear & TIOCM_DTR)
3033 info->MCR &= ~UART_MCR_DTR;
3034
3035 outb(info->MCR, info->base + UART_MCR);
3036 spin_unlock_irqrestore(&info->slock, flags);
3037 return 0;
3038 }
3039
3040
3041 static int mxser_read_register(int, unsigned short *);
3042 static int mxser_program_mode(int);
3043 static void mxser_normal_mode(int);
3044
3045 static int mxser_get_ISA_conf(int cap, struct mxser_hwconf *hwconf)
3046 {
3047 int id, i, bits;
3048 unsigned short regs[16], irq;
3049 unsigned char scratch, scratch2;
3050
3051 hwconf->IsMoxaMustChipFlag = MOXA_OTHER_UART;
3052
3053 id = mxser_read_register(cap, regs);
3054 if (id == C168_ASIC_ID) {
3055 hwconf->board_type = MXSER_BOARD_C168_ISA;
3056 hwconf->ports = 8;
3057 } else if (id == C104_ASIC_ID) {
3058 hwconf->board_type = MXSER_BOARD_C104_ISA;
3059 hwconf->ports = 4;
3060 } else if (id == C102_ASIC_ID) {
3061 hwconf->board_type = MXSER_BOARD_C102_ISA;
3062 hwconf->ports = 2;
3063 } else if (id == CI132_ASIC_ID) {
3064 hwconf->board_type = MXSER_BOARD_CI132;
3065 hwconf->ports = 2;
3066 } else if (id == CI134_ASIC_ID) {
3067 hwconf->board_type = MXSER_BOARD_CI134;
3068 hwconf->ports = 4;
3069 } else if (id == CI104J_ASIC_ID) {
3070 hwconf->board_type = MXSER_BOARD_CI104J;
3071 hwconf->ports = 4;
3072 } else
3073 return 0;
3074
3075 irq = 0;
3076 if (hwconf->ports == 2) {
3077 irq = regs[9] & 0xF000;
3078 irq = irq | (irq >> 4);
3079 if (irq != (regs[9] & 0xFF00))
3080 return MXSER_ERR_IRQ_CONFLIT;
3081 } else if (hwconf->ports == 4) {
3082 irq = regs[9] & 0xF000;
3083 irq = irq | (irq >> 4);
3084 irq = irq | (irq >> 8);
3085 if (irq != regs[9])
3086 return MXSER_ERR_IRQ_CONFLIT;
3087 } else if (hwconf->ports == 8) {
3088 irq = regs[9] & 0xF000;
3089 irq = irq | (irq >> 4);
3090 irq = irq | (irq >> 8);
3091 if ((irq != regs[9]) || (irq != regs[10]))
3092 return MXSER_ERR_IRQ_CONFLIT;
3093 }
3094
3095 if (!irq)
3096 return MXSER_ERR_IRQ;
3097 hwconf->irq = ((int)(irq & 0xF000) >> 12);
3098 for (i = 0; i < 8; i++)
3099 hwconf->ioaddr[i] = (int) regs[i + 1] & 0xFFF8;
3100 if ((regs[12] & 0x80) == 0)
3101 return MXSER_ERR_VECTOR;
3102 hwconf->vector = (int)regs[11]; /* interrupt vector */
3103 if (id == 1)
3104 hwconf->vector_mask = 0x00FF;
3105 else
3106 hwconf->vector_mask = 0x000F;
3107 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
3108 if (regs[12] & bits) {
3109 hwconf->baud_base[i] = 921600;
3110 hwconf->MaxCanSetBaudRate[i] = 921600; /* add by Victor Yu. 09-04-2002 */
3111 } else {
3112 hwconf->baud_base[i] = 115200;
3113 hwconf->MaxCanSetBaudRate[i] = 115200; /* add by Victor Yu. 09-04-2002 */
3114 }
3115 }
3116 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
3117 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
3118 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
3119 outb(scratch2, cap + UART_LCR);
3120 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
3121 scratch = inb(cap + UART_IIR);
3122
3123 if (scratch & 0xC0)
3124 hwconf->uart_type = PORT_16550A;
3125 else
3126 hwconf->uart_type = PORT_16450;
3127 if (id == 1)
3128 hwconf->ports = 8;
3129 else
3130 hwconf->ports = 4;
3131 request_region(hwconf->ioaddr[0], 8 * hwconf->ports, "mxser(IO)");
3132 request_region(hwconf->vector, 1, "mxser(vector)");
3133 return hwconf->ports;
3134 }
3135
3136 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
3137 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
3138 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
3139 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
3140 #define EN_CCMD 0x000 /* Chip's command register */
3141 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
3142 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
3143 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
3144 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
3145 #define EN0_DCFG 0x00E /* Data configuration reg WR */
3146 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
3147 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
3148 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
3149 static int mxser_read_register(int port, unsigned short *regs)
3150 {
3151 int i, k, value, id;
3152 unsigned int j;
3153
3154 id = mxser_program_mode(port);
3155 if (id < 0)
3156 return id;
3157 for (i = 0; i < 14; i++) {
3158 k = (i & 0x3F) | 0x180;
3159 for (j = 0x100; j > 0; j >>= 1) {
3160 outb(CHIP_CS, port);
3161 if (k & j) {
3162 outb(CHIP_CS | CHIP_DO, port);
3163 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
3164 } else {
3165 outb(CHIP_CS, port);
3166 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
3167 }
3168 }
3169 (void)inb(port);
3170 value = 0;
3171 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
3172 outb(CHIP_CS, port);
3173 outb(CHIP_CS | CHIP_SK, port);
3174 if (inb(port) & CHIP_DI)
3175 value |= j;
3176 }
3177 regs[i] = value;
3178 outb(0, port);
3179 }
3180 mxser_normal_mode(port);
3181 return id;
3182 }
3183
3184 static int mxser_program_mode(int port)
3185 {
3186 int id, i, j, n;
3187 /* unsigned long flags; */
3188
3189 spin_lock(&gm_lock);
3190 outb(0, port);
3191 outb(0, port);
3192 outb(0, port);
3193 (void)inb(port);
3194 (void)inb(port);
3195 outb(0, port);
3196 (void)inb(port);
3197 /* restore_flags(flags); */
3198 spin_unlock(&gm_lock);
3199
3200 id = inb(port + 1) & 0x1F;
3201 if ((id != C168_ASIC_ID) &&
3202 (id != C104_ASIC_ID) &&
3203 (id != C102_ASIC_ID) &&
3204 (id != CI132_ASIC_ID) &&
3205 (id != CI134_ASIC_ID) &&
3206 (id != CI104J_ASIC_ID))
3207 return -1;
3208 for (i = 0, j = 0; i < 4; i++) {
3209 n = inb(port + 2);
3210 if (n == 'M') {
3211 j = 1;
3212 } else if ((j == 1) && (n == 1)) {
3213 j = 2;
3214 break;
3215 } else
3216 j = 0;
3217 }
3218 if (j != 2)
3219 id = -2;
3220 return id;
3221 }
3222
3223 static void mxser_normal_mode(int port)
3224 {
3225 int i, n;
3226
3227 outb(0xA5, port + 1);
3228 outb(0x80, port + 3);
3229 outb(12, port + 0); /* 9600 bps */
3230 outb(0, port + 1);
3231 outb(0x03, port + 3); /* 8 data bits */
3232 outb(0x13, port + 4); /* loop back mode */
3233 for (i = 0; i < 16; i++) {
3234 n = inb(port + 5);
3235 if ((n & 0x61) == 0x60)
3236 break;
3237 if ((n & 1) == 1)
3238 (void)inb(port);
3239 }
3240 outb(0x00, port + 4);
3241 }
3242
3243 module_init(mxser_module_init);
3244 module_exit(mxser_module_exit);
Ubuntu Artful kernel mirror