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arch/parisc/: Spelling fixes
[linux-2.6/mini2440.git] / drivers / char / mxser.c
blobfd0abef7ee0867dfb86ccc0958e0a1c64402e947
1 /*
2 * mxser.c -- MOXA Smartio/Industio family multiport serial driver.
3 *
4 * Copyright (C) 1999-2001 Moxa Technologies (support@moxa.com.tw).
5 *
6 * This code is loosely based on the Linux serial driver, written by
7 * Linus Torvalds, Theodore T'so and others.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *
23 * Original release 10/26/00
24 *
25 * 02/06/01 Support MOXA Industio family boards.
26 * 02/06/01 Support TIOCGICOUNT.
27 * 02/06/01 Fix the problem for connecting to serial mouse.
28 * 02/06/01 Fix the problem for H/W flow control.
29 * 02/06/01 Fix the compling warning when CONFIG_PCI
30 * don't be defined.
31 *
32 * Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
33 * <alan@redhat.com>. The original 1.8 code is available on www.moxa.com.
34 * - Fixed x86_64 cleanness
35 * - Fixed sleep with spinlock held in mxser_send_break
36 */
37
38
39 #include <linux/module.h>
40 #include <linux/autoconf.h>
41 #include <linux/errno.h>
42 #include <linux/signal.h>
43 #include <linux/sched.h>
44 #include <linux/timer.h>
45 #include <linux/interrupt.h>
46 #include <linux/tty.h>
47 #include <linux/tty_flip.h>
48 #include <linux/serial.h>
49 #include <linux/serial_reg.h>
50 #include <linux/major.h>
51 #include <linux/string.h>
52 #include <linux/fcntl.h>
53 #include <linux/ptrace.h>
54 #include <linux/gfp.h>
55 #include <linux/ioport.h>
56 #include <linux/mm.h>
57 #include <linux/delay.h>
58 #include <linux/pci.h>
59 #include <linux/bitops.h>
60
61 #include <asm/system.h>
62 #include <asm/io.h>
63 #include <asm/irq.h>
64 #include <asm/uaccess.h>
65
66 #include "mxser.h"
67
68 #define MXSER_VERSION "1.8"
69 #define MXSERMAJOR 174
70 #define MXSERCUMAJOR 175
71
72 #define MXSER_EVENT_TXLOW 1
73 #define MXSER_EVENT_HANGUP 2
74
75 #define MXSER_BOARDS 4 /* Max. boards */
76 #define MXSER_PORTS 32 /* Max. ports */
77 #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
78 #define MXSER_ISR_PASS_LIMIT 256
79
80 #define MXSER_ERR_IOADDR -1
81 #define MXSER_ERR_IRQ -2
82 #define MXSER_ERR_IRQ_CONFLIT -3
83 #define MXSER_ERR_VECTOR -4
84
85 #define SERIAL_TYPE_NORMAL 1
86 #define SERIAL_TYPE_CALLOUT 2
87
88 #define WAKEUP_CHARS 256
89
90 #define UART_MCR_AFE 0x20
91 #define UART_LSR_SPECIAL 0x1E
92
93
94 #define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? IRQF_SHARED : IRQF_DISABLED)
95
96 #define C168_ASIC_ID 1
97 #define C104_ASIC_ID 2
98 #define C102_ASIC_ID 0xB
99 #define CI132_ASIC_ID 4
100 #define CI134_ASIC_ID 3
101 #define CI104J_ASIC_ID 5
102
103 enum {
104 MXSER_BOARD_C168_ISA = 1,
105 MXSER_BOARD_C104_ISA,
106 MXSER_BOARD_CI104J,
107 MXSER_BOARD_C168_PCI,
108 MXSER_BOARD_C104_PCI,
109 MXSER_BOARD_C102_ISA,
110 MXSER_BOARD_CI132,
111 MXSER_BOARD_CI134,
112 MXSER_BOARD_CP132,
113 MXSER_BOARD_CP114,
114 MXSER_BOARD_CT114,
115 MXSER_BOARD_CP102,
116 MXSER_BOARD_CP104U,
117 MXSER_BOARD_CP168U,
118 MXSER_BOARD_CP132U,
119 MXSER_BOARD_CP134U,
120 MXSER_BOARD_CP104JU,
121 MXSER_BOARD_RC7000,
122 MXSER_BOARD_CP118U,
123 MXSER_BOARD_CP102UL,
124 MXSER_BOARD_CP102U,
125 };
126
127 static char *mxser_brdname[] = {
128 "C168 series",
129 "C104 series",
130 "CI-104J series",
131 "C168H/PCI series",
132 "C104H/PCI series",
133 "C102 series",
134 "CI-132 series",
135 "CI-134 series",
136 "CP-132 series",
137 "CP-114 series",
138 "CT-114 series",
139 "CP-102 series",
140 "CP-104U series",
141 "CP-168U series",
142 "CP-132U series",
143 "CP-134U series",
144 "CP-104JU series",
145 "Moxa UC7000 Serial",
146 "CP-118U series",
147 "CP-102UL series",
148 "CP-102U series",
149 };
150
151 static int mxser_numports[] = {
152 8, /* C168-ISA */
153 4, /* C104-ISA */
154 4, /* CI104J */
155 8, /* C168-PCI */
156 4, /* C104-PCI */
157 2, /* C102-ISA */
158 2, /* CI132 */
159 4, /* CI134 */
160 2, /* CP132 */
161 4, /* CP114 */
162 4, /* CT114 */
163 2, /* CP102 */
164 4, /* CP104U */
165 8, /* CP168U */
166 2, /* CP132U */
167 4, /* CP134U */
168 4, /* CP104JU */
169 8, /* RC7000 */
170 8, /* CP118U */
171 2, /* CP102UL */
172 2, /* CP102U */
173 };
174
175 #define UART_TYPE_NUM 2
176
177 static const unsigned int Gmoxa_uart_id[UART_TYPE_NUM] = {
178 MOXA_MUST_MU150_HWID,
179 MOXA_MUST_MU860_HWID
180 };
181
182 /* This is only for PCI */
183 #define UART_INFO_NUM 3
184 struct mxpciuart_info {
185 int type;
186 int tx_fifo;
187 int rx_fifo;
188 int xmit_fifo_size;
189 int rx_high_water;
190 int rx_trigger;
191 int rx_low_water;
192 long max_baud;
193 };
194
195 static const struct mxpciuart_info Gpci_uart_info[UART_INFO_NUM] = {
196 {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
197 {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
198 {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
199 };
200
201
202 #ifdef CONFIG_PCI
203
204 static struct pci_device_id mxser_pcibrds[] = {
205 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C168_PCI},
206 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C104_PCI},
207 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132},
208 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP114},
209 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CT114},
210 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102},
211 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104U},
212 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP168U},
213 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132U},
214 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP134U},
215 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104JU},
216 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_RC7000},
217 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP118U},
218 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102UL},
219 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102U},
220 {0}
221 };
222
223 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
224
225
226 #endif
227
228 typedef struct _moxa_pci_info {
229 unsigned short busNum;
230 unsigned short devNum;
231 struct pci_dev *pdev; /* add by Victor Yu. 06-23-2003 */
232 } moxa_pci_info;
233
234 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
235 static int ttymajor = MXSERMAJOR;
236 static int calloutmajor = MXSERCUMAJOR;
237 static int verbose = 0;
238
239 /* Variables for insmod */
240
241 MODULE_AUTHOR("Casper Yang");
242 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
243 module_param_array(ioaddr, int, NULL, 0);
244 module_param(ttymajor, int, 0);
245 module_param(calloutmajor, int, 0);
246 module_param(verbose, bool, 0);
247 MODULE_LICENSE("GPL");
248
249 struct mxser_log {
250 int tick;
251 unsigned long rxcnt[MXSER_PORTS];
252 unsigned long txcnt[MXSER_PORTS];
253 };
254
255
256 struct mxser_mon {
257 unsigned long rxcnt;
258 unsigned long txcnt;
259 unsigned long up_rxcnt;
260 unsigned long up_txcnt;
261 int modem_status;
262 unsigned char hold_reason;
263 };
264
265 struct mxser_mon_ext {
266 unsigned long rx_cnt[32];
267 unsigned long tx_cnt[32];
268 unsigned long up_rxcnt[32];
269 unsigned long up_txcnt[32];
270 int modem_status[32];
271
272 long baudrate[32];
273 int databits[32];
274 int stopbits[32];
275 int parity[32];
276 int flowctrl[32];
277 int fifo[32];
278 int iftype[32];
279 };
280
281 struct mxser_hwconf {
282 int board_type;
283 int ports;
284 int irq;
285 int vector;
286 int vector_mask;
287 int uart_type;
288 int ioaddr[MXSER_PORTS_PER_BOARD];
289 int baud_base[MXSER_PORTS_PER_BOARD];
290 moxa_pci_info pciInfo;
291 int IsMoxaMustChipFlag; /* add by Victor Yu. 08-30-2002 */
292 int MaxCanSetBaudRate[MXSER_PORTS_PER_BOARD]; /* add by Victor Yu. 09-04-2002 */
293 int opmode_ioaddr[MXSER_PORTS_PER_BOARD]; /* add by Victor Yu. 01-05-2004 */
294 };
295
296 struct mxser_struct {
297 int port;
298 int base; /* port base address */
299 int irq; /* port using irq no. */
300 int vector; /* port irq vector */
301 int vectormask; /* port vector mask */
302 int rx_high_water;
303 int rx_trigger; /* Rx fifo trigger level */
304 int rx_low_water;
305 int baud_base; /* max. speed */
306 int flags; /* defined in tty.h */
307 int type; /* UART type */
308 struct tty_struct *tty;
309 int read_status_mask;
310 int ignore_status_mask;
311 int xmit_fifo_size;
312 int custom_divisor;
313 int x_char; /* xon/xoff character */
314 int close_delay;
315 unsigned short closing_wait;
316 int IER; /* Interrupt Enable Register */
317 int MCR; /* Modem control register */
318 unsigned long event;
319 int count; /* # of fd on device */
320 int blocked_open; /* # of blocked opens */
321 unsigned char *xmit_buf;
322 int xmit_head;
323 int xmit_tail;
324 int xmit_cnt;
325 struct work_struct tqueue;
326 struct ktermios normal_termios;
327 struct ktermios callout_termios;
328 wait_queue_head_t open_wait;
329 wait_queue_head_t close_wait;
330 wait_queue_head_t delta_msr_wait;
331 struct async_icount icount; /* kernel counters for the 4 input interrupts */
332 int timeout;
333 int IsMoxaMustChipFlag; /* add by Victor Yu. 08-30-2002 */
334 int MaxCanSetBaudRate; /* add by Victor Yu. 09-04-2002 */
335 int opmode_ioaddr; /* add by Victor Yu. 01-05-2004 */
336 unsigned char stop_rx;
337 unsigned char ldisc_stop_rx;
338 long realbaud;
339 struct mxser_mon mon_data;
340 unsigned char err_shadow;
341 spinlock_t slock;
342 };
343
344 struct mxser_mstatus {
345 tcflag_t cflag;
346 int cts;
347 int dsr;
348 int ri;
349 int dcd;
350 };
351
352 static struct mxser_mstatus GMStatus[MXSER_PORTS];
353
354 static int mxserBoardCAP[MXSER_BOARDS] = {
355 0, 0, 0, 0
356 /* 0x180, 0x280, 0x200, 0x320 */
357 };
358
359 static struct tty_driver *mxvar_sdriver;
360 static struct mxser_struct mxvar_table[MXSER_PORTS];
361 static struct tty_struct *mxvar_tty[MXSER_PORTS + 1];
362 static struct ktermios *mxvar_termios[MXSER_PORTS + 1];
363 static struct ktermios *mxvar_termios_locked[MXSER_PORTS + 1];
364 static struct mxser_log mxvar_log;
365 static int mxvar_diagflag;
366 static unsigned char mxser_msr[MXSER_PORTS + 1];
367 static struct mxser_mon_ext mon_data_ext;
368 static int mxser_set_baud_method[MXSER_PORTS + 1];
369 static spinlock_t gm_lock;
370
371 /*
372 * This is used to figure out the divisor speeds and the timeouts
373 */
374
375 static struct mxser_hwconf mxsercfg[MXSER_BOARDS];
376
377 /*
378 * static functions:
379 */
380
381 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf);
382 static int mxser_init(void);
383
384 /* static void mxser_poll(unsigned long); */
385 static int mxser_get_ISA_conf(int, struct mxser_hwconf *);
386 static void mxser_do_softint(struct work_struct *);
387 static int mxser_open(struct tty_struct *, struct file *);
388 static void mxser_close(struct tty_struct *, struct file *);
389 static int mxser_write(struct tty_struct *, const unsigned char *, int);
390 static int mxser_write_room(struct tty_struct *);
391 static void mxser_flush_buffer(struct tty_struct *);
392 static int mxser_chars_in_buffer(struct tty_struct *);
393 static void mxser_flush_chars(struct tty_struct *);
394 static void mxser_put_char(struct tty_struct *, unsigned char);
395 static int mxser_ioctl(struct tty_struct *, struct file *, uint, ulong);
396 static int mxser_ioctl_special(unsigned int, void __user *);
397 static void mxser_throttle(struct tty_struct *);
398 static void mxser_unthrottle(struct tty_struct *);
399 static void mxser_set_termios(struct tty_struct *, struct ktermios *);
400 static void mxser_stop(struct tty_struct *);
401 static void mxser_start(struct tty_struct *);
402 static void mxser_hangup(struct tty_struct *);
403 static void mxser_rs_break(struct tty_struct *, int);
404 static irqreturn_t mxser_interrupt(int, void *);
405 static void mxser_receive_chars(struct mxser_struct *, int *);
406 static void mxser_transmit_chars(struct mxser_struct *);
407 static void mxser_check_modem_status(struct mxser_struct *, int);
408 static int mxser_block_til_ready(struct tty_struct *, struct file *, struct mxser_struct *);
409 static int mxser_startup(struct mxser_struct *);
410 static void mxser_shutdown(struct mxser_struct *);
411 static int mxser_change_speed(struct mxser_struct *, struct ktermios *old_termios);
412 static int mxser_get_serial_info(struct mxser_struct *, struct serial_struct __user *);
413 static int mxser_set_serial_info(struct mxser_struct *, struct serial_struct __user *);
414 static int mxser_get_lsr_info(struct mxser_struct *, unsigned int __user *);
415 static void mxser_send_break(struct mxser_struct *, int);
416 static int mxser_tiocmget(struct tty_struct *, struct file *);
417 static int mxser_tiocmset(struct tty_struct *, struct file *, unsigned int, unsigned int);
418 static int mxser_set_baud(struct mxser_struct *info, long newspd);
419 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout);
420
421 static void mxser_startrx(struct tty_struct *tty);
422 static void mxser_stoprx(struct tty_struct *tty);
423
424 #ifdef CONFIG_PCI
425 static int CheckIsMoxaMust(int io)
426 {
427 u8 oldmcr, hwid;
428 int i;
429
430 outb(0, io + UART_LCR);
431 DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
432 oldmcr = inb(io + UART_MCR);
433 outb(0, io + UART_MCR);
434 SET_MOXA_MUST_XON1_VALUE(io, 0x11);
435 if ((hwid = inb(io + UART_MCR)) != 0) {
436 outb(oldmcr, io + UART_MCR);
437 return MOXA_OTHER_UART;
438 }
439
440 GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
441 for (i = 0; i < UART_TYPE_NUM; i++) {
442 if (hwid == Gmoxa_uart_id[i])
443 return (int)hwid;
444 }
445 return MOXA_OTHER_UART;
446 }
447 #endif
448
449 /* above is modified by Victor Yu. 08-15-2002 */
450
451 static const struct tty_operations mxser_ops = {
452 .open = mxser_open,
453 .close = mxser_close,
454 .write = mxser_write,
455 .put_char = mxser_put_char,
456 .flush_chars = mxser_flush_chars,
457 .write_room = mxser_write_room,
458 .chars_in_buffer = mxser_chars_in_buffer,
459 .flush_buffer = mxser_flush_buffer,
460 .ioctl = mxser_ioctl,
461 .throttle = mxser_throttle,
462 .unthrottle = mxser_unthrottle,
463 .set_termios = mxser_set_termios,
464 .stop = mxser_stop,
465 .start = mxser_start,
466 .hangup = mxser_hangup,
467 .break_ctl = mxser_rs_break,
468 .wait_until_sent = mxser_wait_until_sent,
469 .tiocmget = mxser_tiocmget,
470 .tiocmset = mxser_tiocmset,
471 };
472
473 /*
474 * The MOXA Smartio/Industio serial driver boot-time initialization code!
475 */
476
477 static int __init mxser_module_init(void)
478 {
479 int ret;
480
481 if (verbose)
482 printk(KERN_DEBUG "Loading module mxser ...\n");
483 ret = mxser_init();
484 if (verbose)
485 printk(KERN_DEBUG "Done.\n");
486 return ret;
487 }
488
489 static void __exit mxser_module_exit(void)
490 {
491 int i, err;
492
493 if (verbose)
494 printk(KERN_DEBUG "Unloading module mxser ...\n");
495
496 err = tty_unregister_driver(mxvar_sdriver);
497 if (!err)
498 put_tty_driver(mxvar_sdriver);
499 else
500 printk(KERN_ERR "Couldn't unregister MOXA Smartio/Industio family serial driver\n");
501
502 for (i = 0; i < MXSER_BOARDS; i++) {
503 struct pci_dev *pdev;
504
505 if (mxsercfg[i].board_type == -1)
506 continue;
507 else {
508 pdev = mxsercfg[i].pciInfo.pdev;
509 free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
510 if (pdev != NULL) { /* PCI */
511 release_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2));
512 release_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3));
513 pci_dev_put(pdev);
514 } else {
515 release_region(mxsercfg[i].ioaddr[0], 8 * mxsercfg[i].ports);
516 release_region(mxsercfg[i].vector, 1);
517 }
518 }
519 }
520 if (verbose)
521 printk(KERN_DEBUG "Done.\n");
522 }
523
524 static void process_txrx_fifo(struct mxser_struct *info)
525 {
526 int i;
527
528 if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
529 info->rx_trigger = 1;
530 info->rx_high_water = 1;
531 info->rx_low_water = 1;
532 info->xmit_fifo_size = 1;
533 } else {
534 for (i = 0; i < UART_INFO_NUM; i++) {
535 if (info->IsMoxaMustChipFlag == Gpci_uart_info[i].type) {
536 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
537 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
538 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
539 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
540 break;
541 }
542 }
543 }
544 }
545
546 static int mxser_initbrd(int board, struct mxser_hwconf *hwconf)
547 {
548 struct mxser_struct *info;
549 int retval;
550 int i, n;
551
552 n = board * MXSER_PORTS_PER_BOARD;
553 info = &mxvar_table[n];
554 /*if (verbose) */ {
555 printk(KERN_DEBUG " ttyMI%d - ttyMI%d ",
556 n, n + hwconf->ports - 1);
557 printk(" max. baud rate = %d bps.\n",
558 hwconf->MaxCanSetBaudRate[0]);
559 }
560
561 for (i = 0; i < hwconf->ports; i++, n++, info++) {
562 info->port = n;
563 info->base = hwconf->ioaddr[i];
564 info->irq = hwconf->irq;
565 info->vector = hwconf->vector;
566 info->vectormask = hwconf->vector_mask;
567 info->opmode_ioaddr = hwconf->opmode_ioaddr[i]; /* add by Victor Yu. 01-05-2004 */
568 info->stop_rx = 0;
569 info->ldisc_stop_rx = 0;
570
571 info->IsMoxaMustChipFlag = hwconf->IsMoxaMustChipFlag;
572 /* Enhance mode enabled here */
573 if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
574 ENABLE_MOXA_MUST_ENCHANCE_MODE(info->base);
575 }
576
577 info->flags = ASYNC_SHARE_IRQ;
578 info->type = hwconf->uart_type;
579 info->baud_base = hwconf->baud_base[i];
580
581 info->MaxCanSetBaudRate = hwconf->MaxCanSetBaudRate[i];
582
583 process_txrx_fifo(info);
584
585
586 info->custom_divisor = hwconf->baud_base[i] * 16;
587 info->close_delay = 5 * HZ / 10;
588 info->closing_wait = 30 * HZ;
589 INIT_WORK(&info->tqueue, mxser_do_softint);
590 info->normal_termios = mxvar_sdriver->init_termios;
591 init_waitqueue_head(&info->open_wait);
592 init_waitqueue_head(&info->close_wait);
593 init_waitqueue_head(&info->delta_msr_wait);
594 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
595 info->err_shadow = 0;
596 spin_lock_init(&info->slock);
597 }
598 /*
599 * Allocate the IRQ if necessary
600 */
601
602
603 /* before set INT ISR, disable all int */
604 for (i = 0; i < hwconf->ports; i++) {
605 outb(inb(hwconf->ioaddr[i] + UART_IER) & 0xf0,
606 hwconf->ioaddr[i] + UART_IER);
607 }
608
609 n = board * MXSER_PORTS_PER_BOARD;
610 info = &mxvar_table[n];
611
612 retval = request_irq(hwconf->irq, mxser_interrupt, IRQ_T(info),
613 "mxser", info);
614 if (retval) {
615 printk(KERN_ERR "Board %d: %s",
616 board, mxser_brdname[hwconf->board_type - 1]);
617 printk(" Request irq failed, IRQ (%d) may conflict with"
618 " another device.\n", info->irq);
619 return retval;
620 }
621 return 0;
622 }
623
624 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf)
625 {
626 mxsercfg[board] = *hwconf;
627 }
628
629 #ifdef CONFIG_PCI
630 static int mxser_get_PCI_conf(int busnum, int devnum, int board_type, struct mxser_hwconf *hwconf)
631 {
632 int i, j;
633 /* unsigned int val; */
634 unsigned int ioaddress;
635 struct pci_dev *pdev = hwconf->pciInfo.pdev;
636
637 /* io address */
638 hwconf->board_type = board_type;
639 hwconf->ports = mxser_numports[board_type - 1];
640 ioaddress = pci_resource_start(pdev, 2);
641 request_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2),
642 "mxser(IO)");
643
644 for (i = 0; i < hwconf->ports; i++)
645 hwconf->ioaddr[i] = ioaddress + 8 * i;
646
647 /* vector */
648 ioaddress = pci_resource_start(pdev, 3);
649 request_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3),
650 "mxser(vector)");
651 hwconf->vector = ioaddress;
652
653 /* irq */
654 hwconf->irq = hwconf->pciInfo.pdev->irq;
655
656 hwconf->IsMoxaMustChipFlag = CheckIsMoxaMust(hwconf->ioaddr[0]);
657 hwconf->uart_type = PORT_16550A;
658 hwconf->vector_mask = 0;
659
660
661 for (i = 0; i < hwconf->ports; i++) {
662 for (j = 0; j < UART_INFO_NUM; j++) {
663 if (Gpci_uart_info[j].type == hwconf->IsMoxaMustChipFlag) {
664 hwconf->MaxCanSetBaudRate[i] = Gpci_uart_info[j].max_baud;
665
666 /* exception....CP-102 */
667 if (board_type == MXSER_BOARD_CP102)
668 hwconf->MaxCanSetBaudRate[i] = 921600;
669 break;
670 }
671 }
672 }
673
674 if (hwconf->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID) {
675 for (i = 0; i < hwconf->ports; i++) {
676 if (i < 4)
677 hwconf->opmode_ioaddr[i] = ioaddress + 4;
678 else
679 hwconf->opmode_ioaddr[i] = ioaddress + 0x0c;
680 }
681 outb(0, ioaddress + 4); /* default set to RS232 mode */
682 outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
683 }
684
685 for (i = 0; i < hwconf->ports; i++) {
686 hwconf->vector_mask |= (1 << i);
687 hwconf->baud_base[i] = 921600;
688 }
689 return 0;
690 }
691 #endif
692
693 static int mxser_init(void)
694 {
695 int i, m, retval, b, n;
696 struct pci_dev *pdev = NULL;
697 int index;
698 unsigned char busnum, devnum;
699 struct mxser_hwconf hwconf;
700
701 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
702 if (!mxvar_sdriver)
703 return -ENOMEM;
704 spin_lock_init(&gm_lock);
705
706 for (i = 0; i < MXSER_BOARDS; i++) {
707 mxsercfg[i].board_type = -1;
708 }
709
710 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
711 MXSER_VERSION);
712
713 /* Initialize the tty_driver structure */
714 memset(mxvar_sdriver, 0, sizeof(struct tty_driver));
715 mxvar_sdriver->owner = THIS_MODULE;
716 mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
717 mxvar_sdriver->name = "ttyMI";
718 mxvar_sdriver->major = ttymajor;
719 mxvar_sdriver->minor_start = 0;
720 mxvar_sdriver->num = MXSER_PORTS + 1;
721 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
722 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
723 mxvar_sdriver->init_termios = tty_std_termios;
724 mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
725 mxvar_sdriver->init_termios.c_ispeed = 9600;
726 mxvar_sdriver->init_termios.c_ospeed = 9600;
727 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW;
728 tty_set_operations(mxvar_sdriver, &mxser_ops);
729 mxvar_sdriver->ttys = mxvar_tty;
730 mxvar_sdriver->termios = mxvar_termios;
731 mxvar_sdriver->termios_locked = mxvar_termios_locked;
732
733 mxvar_diagflag = 0;
734 memset(mxvar_table, 0, MXSER_PORTS * sizeof(struct mxser_struct));
735 memset(&mxvar_log, 0, sizeof(struct mxser_log));
736
737 memset(&mxser_msr, 0, sizeof(unsigned char) * (MXSER_PORTS + 1));
738 memset(&mon_data_ext, 0, sizeof(struct mxser_mon_ext));
739 memset(&mxser_set_baud_method, 0, sizeof(int) * (MXSER_PORTS + 1));
740 memset(&hwconf, 0, sizeof(struct mxser_hwconf));
741
742 m = 0;
743 /* Start finding ISA boards here */
744 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
745 int cap;
746
747 if (!(cap = mxserBoardCAP[b]))
748 continue;
749
750 retval = mxser_get_ISA_conf(cap, &hwconf);
751
752 if (retval != 0)
753 printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
754 mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
755
756 if (retval <= 0) {
757 if (retval == MXSER_ERR_IRQ)
758 printk(KERN_ERR "Invalid interrupt number, "
759 "board not configured\n");
760 else if (retval == MXSER_ERR_IRQ_CONFLIT)
761 printk(KERN_ERR "Invalid interrupt number, "
762 "board not configured\n");
763 else if (retval == MXSER_ERR_VECTOR)
764 printk(KERN_ERR "Invalid interrupt vector, "
765 "board not configured\n");
766 else if (retval == MXSER_ERR_IOADDR)
767 printk(KERN_ERR "Invalid I/O address, "
768 "board not configured\n");
769
770 continue;
771 }
772
773 hwconf.pciInfo.busNum = 0;
774 hwconf.pciInfo.devNum = 0;
775 hwconf.pciInfo.pdev = NULL;
776
777 mxser_getcfg(m, &hwconf);
778 /*
779 * init mxsercfg first,
780 * or mxsercfg data is not correct on ISR.
781 */
782 /* mxser_initbrd will hook ISR. */
783 if (mxser_initbrd(m, &hwconf) < 0)
784 continue;
785
786 m++;
787 }
788
789 /* Start finding ISA boards from module arg */
790 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
791 int cap;
792
793 if (!(cap = ioaddr[b]))
794 continue;
795
796 retval = mxser_get_ISA_conf(cap, &hwconf);
797
798 if (retval != 0)
799 printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
800 mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
801
802 if (retval <= 0) {
803 if (retval == MXSER_ERR_IRQ)
804 printk(KERN_ERR "Invalid interrupt number, "
805 "board not configured\n");
806 else if (retval == MXSER_ERR_IRQ_CONFLIT)
807 printk(KERN_ERR "Invalid interrupt number, "
808 "board not configured\n");
809 else if (retval == MXSER_ERR_VECTOR)
810 printk(KERN_ERR "Invalid interrupt vector, "
811 "board not configured\n");
812 else if (retval == MXSER_ERR_IOADDR)
813 printk(KERN_ERR "Invalid I/O address, "
814 "board not configured\n");
815
816 continue;
817 }
818
819 hwconf.pciInfo.busNum = 0;
820 hwconf.pciInfo.devNum = 0;
821 hwconf.pciInfo.pdev = NULL;
822
823 mxser_getcfg(m, &hwconf);
824 /*
825 * init mxsercfg first,
826 * or mxsercfg data is not correct on ISR.
827 */
828 /* mxser_initbrd will hook ISR. */
829 if (mxser_initbrd(m, &hwconf) < 0)
830 continue;
831
832 m++;
833 }
834
835 /* start finding PCI board here */
836 #ifdef CONFIG_PCI
837 n = ARRAY_SIZE(mxser_pcibrds) - 1;
838 index = 0;
839 b = 0;
840 while (b < n) {
841 pdev = pci_get_device(mxser_pcibrds[b].vendor,
842 mxser_pcibrds[b].device, pdev);
843 if (pdev == NULL) {
844 b++;
845 continue;
846 }
847 hwconf.pciInfo.busNum = busnum = pdev->bus->number;
848 hwconf.pciInfo.devNum = devnum = PCI_SLOT(pdev->devfn) << 3;
849 hwconf.pciInfo.pdev = pdev;
850 printk(KERN_INFO "Found MOXA %s board(BusNo=%d,DevNo=%d)\n",
851 mxser_brdname[(int) (mxser_pcibrds[b].driver_data) - 1],
852 busnum, devnum >> 3);
853 index++;
854 if (m >= MXSER_BOARDS)
855 printk(KERN_ERR
856 "Too many Smartio/Industio family boards find "
857 "(maximum %d), board not configured\n",
858 MXSER_BOARDS);
859 else {
860 if (pci_enable_device(pdev)) {
861 printk(KERN_ERR "Moxa SmartI/O PCI enable "
862 "fail !\n");
863 continue;
864 }
865 retval = mxser_get_PCI_conf(busnum, devnum,
866 (int)mxser_pcibrds[b].driver_data,
867 &hwconf);
868 if (retval < 0) {
869 if (retval == MXSER_ERR_IRQ)
870 printk(KERN_ERR
871 "Invalid interrupt number, "
872 "board not configured\n");
873 else if (retval == MXSER_ERR_IRQ_CONFLIT)
874 printk(KERN_ERR
875 "Invalid interrupt number, "
876 "board not configured\n");
877 else if (retval == MXSER_ERR_VECTOR)
878 printk(KERN_ERR
879 "Invalid interrupt vector, "
880 "board not configured\n");
881 else if (retval == MXSER_ERR_IOADDR)
882 printk(KERN_ERR
883 "Invalid I/O address, "
884 "board not configured\n");
885 continue;
886 }
887 mxser_getcfg(m, &hwconf);
888 /* init mxsercfg first,
889 * or mxsercfg data is not correct on ISR.
890 */
891 /* mxser_initbrd will hook ISR. */
892 if (mxser_initbrd(m, &hwconf) < 0)
893 continue;
894 m++;
895 /* Keep an extra reference if we succeeded. It will
896 be returned at unload time */
897 pci_dev_get(pdev);
898 }
899 }
900 #endif
901
902 retval = tty_register_driver(mxvar_sdriver);
903 if (retval) {
904 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family"
905 " driver !\n");
906 put_tty_driver(mxvar_sdriver);
907
908 for (i = 0; i < MXSER_BOARDS; i++) {
909 if (mxsercfg[i].board_type == -1)
910 continue;
911 else {
912 free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
913 /* todo: release io, vector */
914 }
915 }
916 return retval;
917 }
918
919 return 0;
920 }
921
922 static void mxser_do_softint(struct work_struct *work)
923 {
924 struct mxser_struct *info =
925 container_of(work, struct mxser_struct, tqueue);
926 struct tty_struct *tty;
927
928 tty = info->tty;
929
930 if (tty) {
931 if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
932 tty_wakeup(tty);
933 if (test_and_clear_bit(MXSER_EVENT_HANGUP, &info->event))
934 tty_hangup(tty);
935 }
936 }
937
938 static unsigned char mxser_get_msr(int baseaddr, int mode, int port, struct mxser_struct *info)
939 {
940 unsigned char status = 0;
941
942 status = inb(baseaddr + UART_MSR);
943
944 mxser_msr[port] &= 0x0F;
945 mxser_msr[port] |= status;
946 status = mxser_msr[port];
947 if (mode)
948 mxser_msr[port] = 0;
949
950 return status;
951 }
952
953 /*
954 * This routine is called whenever a serial port is opened. It
955 * enables interrupts for a serial port, linking in its async structure into
956 * the IRQ chain. It also performs the serial-specific
957 * initialization for the tty structure.
958 */
959 static int mxser_open(struct tty_struct *tty, struct file *filp)
960 {
961 struct mxser_struct *info;
962 int retval, line;
963
964 /* initialize driver_data in case something fails */
965 tty->driver_data = NULL;
966
967 line = tty->index;
968 if (line == MXSER_PORTS)
969 return 0;
970 if (line < 0 || line > MXSER_PORTS)
971 return -ENODEV;
972 info = mxvar_table + line;
973 if (!info->base)
974 return -ENODEV;
975
976 tty->driver_data = info;
977 info->tty = tty;
978 /*
979 * Start up serial port
980 */
981 retval = mxser_startup(info);
982 if (retval)
983 return retval;
984
985 retval = mxser_block_til_ready(tty, filp, info);
986 if (retval)
987 return retval;
988
989 info->count++;
990
991 if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
992 if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
993 *tty->termios = info->normal_termios;
994 else
995 *tty->termios = info->callout_termios;
996 mxser_change_speed(info, NULL);
997 }
998
999 /*
1000 status = mxser_get_msr(info->base, 0, info->port);
1001 mxser_check_modem_status(info, status);
1002 */
1003
1004 /* unmark here for very high baud rate (ex. 921600 bps) used */
1005 tty->low_latency = 1;
1006 return 0;
1007 }
1008
1009 /*
1010 * This routine is called when the serial port gets closed. First, we
1011 * wait for the last remaining data to be sent. Then, we unlink its
1012 * async structure from the interrupt chain if necessary, and we free
1013 * that IRQ if nothing is left in the chain.
1014 */
1015 static void mxser_close(struct tty_struct *tty, struct file *filp)
1016 {
1017 struct mxser_struct *info = tty->driver_data;
1018
1019 unsigned long timeout;
1020 unsigned long flags;
1021 struct tty_ldisc *ld;
1022
1023 if (tty->index == MXSER_PORTS)
1024 return;
1025 if (!info)
1026 return;
1027
1028 spin_lock_irqsave(&info->slock, flags);
1029
1030 if (tty_hung_up_p(filp)) {
1031 spin_unlock_irqrestore(&info->slock, flags);
1032 return;
1033 }
1034 if ((tty->count == 1) && (info->count != 1)) {
1035 /*
1036 * Uh, oh. tty->count is 1, which means that the tty
1037 * structure will be freed. Info->count should always
1038 * be one in these conditions. If it's greater than
1039 * one, we've got real problems, since it means the
1040 * serial port won't be shutdown.
1041 */
1042 printk(KERN_ERR "mxser_close: bad serial port count; "
1043 "tty->count is 1, info->count is %d\n", info->count);
1044 info->count = 1;
1045 }
1046 if (--info->count < 0) {
1047 printk(KERN_ERR "mxser_close: bad serial port count for "
1048 "ttys%d: %d\n", info->port, info->count);
1049 info->count = 0;
1050 }
1051 if (info->count) {
1052 spin_unlock_irqrestore(&info->slock, flags);
1053 return;
1054 }
1055 info->flags |= ASYNC_CLOSING;
1056 spin_unlock_irqrestore(&info->slock, flags);
1057 /*
1058 * Save the termios structure, since this port may have
1059 * separate termios for callout and dialin.
1060 */
1061 if (info->flags & ASYNC_NORMAL_ACTIVE)
1062 info->normal_termios = *tty->termios;
1063 /*
1064 * Now we wait for the transmit buffer to clear; and we notify
1065 * the line discipline to only process XON/XOFF characters.
1066 */
1067 tty->closing = 1;
1068 if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1069 tty_wait_until_sent(tty, info->closing_wait);
1070 /*
1071 * At this point we stop accepting input. To do this, we
1072 * disable the receive line status interrupts, and tell the
1073 * interrupt driver to stop checking the data ready bit in the
1074 * line status register.
1075 */
1076 info->IER &= ~UART_IER_RLSI;
1077 if (info->IsMoxaMustChipFlag)
1078 info->IER &= ~MOXA_MUST_RECV_ISR;
1079 /* by William
1080 info->read_status_mask &= ~UART_LSR_DR;
1081 */
1082 if (info->flags & ASYNC_INITIALIZED) {
1083 outb(info->IER, info->base + UART_IER);
1084 /*
1085 * Before we drop DTR, make sure the UART transmitter
1086 * has completely drained; this is especially
1087 * important if there is a transmit FIFO!
1088 */
1089 timeout = jiffies + HZ;
1090 while (!(inb(info->base + UART_LSR) & UART_LSR_TEMT)) {
1091 schedule_timeout_interruptible(5);
1092 if (time_after(jiffies, timeout))
1093 break;
1094 }
1095 }
1096 mxser_shutdown(info);
1097
1098 if (tty->driver->flush_buffer)
1099 tty->driver->flush_buffer(tty);
1100
1101 ld = tty_ldisc_ref(tty);
1102 if (ld) {
1103 if (ld->flush_buffer)
1104 ld->flush_buffer(tty);
1105 tty_ldisc_deref(ld);
1106 }
1107
1108 tty->closing = 0;
1109 info->event = 0;
1110 info->tty = NULL;
1111 if (info->blocked_open) {
1112 if (info->close_delay)
1113 schedule_timeout_interruptible(info->close_delay);
1114 wake_up_interruptible(&info->open_wait);
1115 }
1116
1117 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1118 wake_up_interruptible(&info->close_wait);
1119
1120 }
1121
1122 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1123 {
1124 int c, total = 0;
1125 struct mxser_struct *info = tty->driver_data;
1126 unsigned long flags;
1127
1128 if (!info->xmit_buf)
1129 return 0;
1130
1131 while (1) {
1132 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1133 SERIAL_XMIT_SIZE - info->xmit_head));
1134 if (c <= 0)
1135 break;
1136
1137 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1138 spin_lock_irqsave(&info->slock, flags);
1139 info->xmit_head = (info->xmit_head + c) &
1140 (SERIAL_XMIT_SIZE - 1);
1141 info->xmit_cnt += c;
1142 spin_unlock_irqrestore(&info->slock, flags);
1143
1144 buf += c;
1145 count -= c;
1146 total += c;
1147 }
1148
1149 if (info->xmit_cnt && !tty->stopped && !(info->IER & UART_IER_THRI)) {
1150 if (!tty->hw_stopped ||
1151 (info->type == PORT_16550A) ||
1152 (info->IsMoxaMustChipFlag)) {
1153 spin_lock_irqsave(&info->slock, flags);
1154 info->IER |= UART_IER_THRI;
1155 outb(info->IER, info->base + UART_IER);
1156 spin_unlock_irqrestore(&info->slock, flags);
1157 }
1158 }
1159 return total;
1160 }
1161
1162 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1163 {
1164 struct mxser_struct *info = tty->driver_data;
1165 unsigned long flags;
1166
1167 if (!info->xmit_buf)
1168 return;
1169
1170 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1171 return;
1172
1173 spin_lock_irqsave(&info->slock, flags);
1174 info->xmit_buf[info->xmit_head++] = ch;
1175 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1176 info->xmit_cnt++;
1177 spin_unlock_irqrestore(&info->slock, flags);
1178 if (!tty->stopped && !(info->IER & UART_IER_THRI)) {
1179 if (!tty->hw_stopped ||
1180 (info->type == PORT_16550A) ||
1181 info->IsMoxaMustChipFlag) {
1182 spin_lock_irqsave(&info->slock, flags);
1183 info->IER |= UART_IER_THRI;
1184 outb(info->IER, info->base + UART_IER);
1185 spin_unlock_irqrestore(&info->slock, flags);
1186 }
1187 }
1188 }
1189
1190
1191 static void mxser_flush_chars(struct tty_struct *tty)
1192 {
1193 struct mxser_struct *info = tty->driver_data;
1194 unsigned long flags;
1195
1196 if (info->xmit_cnt <= 0 ||
1197 tty->stopped ||
1198 !info->xmit_buf ||
1199 (tty->hw_stopped &&
1200 (info->type != PORT_16550A) &&
1201 (!info->IsMoxaMustChipFlag)
1202 ))
1203 return;
1204
1205 spin_lock_irqsave(&info->slock, flags);
1206
1207 info->IER |= UART_IER_THRI;
1208 outb(info->IER, info->base + UART_IER);
1209
1210 spin_unlock_irqrestore(&info->slock, flags);
1211 }
1212
1213 static int mxser_write_room(struct tty_struct *tty)
1214 {
1215 struct mxser_struct *info = tty->driver_data;
1216 int ret;
1217
1218 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1219 if (ret < 0)
1220 ret = 0;
1221 return ret;
1222 }
1223
1224 static int mxser_chars_in_buffer(struct tty_struct *tty)
1225 {
1226 struct mxser_struct *info = tty->driver_data;
1227 return info->xmit_cnt;
1228 }
1229
1230 static void mxser_flush_buffer(struct tty_struct *tty)
1231 {
1232 struct mxser_struct *info = tty->driver_data;
1233 char fcr;
1234 unsigned long flags;
1235
1236
1237 spin_lock_irqsave(&info->slock, flags);
1238 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1239
1240 /* below added by shinhay */
1241 fcr = inb(info->base + UART_FCR);
1242 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1243 info->base + UART_FCR);
1244 outb(fcr, info->base + UART_FCR);
1245
1246 spin_unlock_irqrestore(&info->slock, flags);
1247 /* above added by shinhay */
1248
1249 tty_wakeup(tty);
1250 }
1251
1252 static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1253 {
1254 struct mxser_struct *info = tty->driver_data;
1255 int retval;
1256 struct async_icount cprev, cnow; /* kernel counter temps */
1257 struct serial_icounter_struct __user *p_cuser;
1258 unsigned long templ;
1259 unsigned long flags;
1260 void __user *argp = (void __user *)arg;
1261
1262 if (tty->index == MXSER_PORTS)
1263 return mxser_ioctl_special(cmd, argp);
1264
1265 /* following add by Victor Yu. 01-05-2004 */
1266 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1267 int opmode, p;
1268 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1269 int shiftbit;
1270 unsigned char val, mask;
1271
1272 p = info->port % 4;
1273 if (cmd == MOXA_SET_OP_MODE) {
1274 if (get_user(opmode, (int __user *) argp))
1275 return -EFAULT;
1276 if (opmode != RS232_MODE &&
1277 opmode != RS485_2WIRE_MODE &&
1278 opmode != RS422_MODE &&
1279 opmode != RS485_4WIRE_MODE)
1280 return -EFAULT;
1281 mask = ModeMask[p];
1282 shiftbit = p * 2;
1283 val = inb(info->opmode_ioaddr);
1284 val &= mask;
1285 val |= (opmode << shiftbit);
1286 outb(val, info->opmode_ioaddr);
1287 } else {
1288 shiftbit = p * 2;
1289 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1290 opmode &= OP_MODE_MASK;
1291 if (copy_to_user(argp, &opmode, sizeof(int)))
1292 return -EFAULT;
1293 }
1294 return 0;
1295 }
1296 /* above add by Victor Yu. 01-05-2004 */
1297
1298 if ((cmd != TIOCGSERIAL) && (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1299 if (tty->flags & (1 << TTY_IO_ERROR))
1300 return -EIO;
1301 }
1302 switch (cmd) {
1303 case TCSBRK: /* SVID version: non-zero arg --> no break */
1304 retval = tty_check_change(tty);
1305 if (retval)
1306 return retval;
1307 tty_wait_until_sent(tty, 0);
1308 if (!arg)
1309 mxser_send_break(info, HZ / 4); /* 1/4 second */
1310 return 0;
1311 case TCSBRKP: /* support for POSIX tcsendbreak() */
1312 retval = tty_check_change(tty);
1313 if (retval)
1314 return retval;
1315 tty_wait_until_sent(tty, 0);
1316 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1317 return 0;
1318 case TIOCGSOFTCAR:
1319 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
1320 case TIOCSSOFTCAR:
1321 if (get_user(templ, (unsigned long __user *) argp))
1322 return -EFAULT;
1323 arg = templ;
1324 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1325 return 0;
1326 case TIOCGSERIAL:
1327 return mxser_get_serial_info(info, argp);
1328 case TIOCSSERIAL:
1329 return mxser_set_serial_info(info, argp);
1330 case TIOCSERGETLSR: /* Get line status register */
1331 return mxser_get_lsr_info(info, argp);
1332 /*
1333 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1334 * - mask passed in arg for lines of interest
1335 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1336 * Caller should use TIOCGICOUNT to see which one it was
1337 */
1338 case TIOCMIWAIT:
1339 spin_lock_irqsave(&info->slock, flags);
1340 cnow = info->icount; /* note the counters on entry */
1341 spin_unlock_irqrestore(&info->slock, flags);
1342
1343 wait_event_interruptible(info->delta_msr_wait, ({
1344 cprev = cnow;
1345 spin_lock_irqsave(&info->slock, flags);
1346 cnow = info->icount; /* atomic copy */
1347 spin_unlock_irqrestore(&info->slock, flags);
1348
1349 ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
1350 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
1351 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
1352 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts));
1353 }));
1354 break;
1355 /*
1356 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1357 * Return: write counters to the user passed counter struct
1358 * NB: both 1->0 and 0->1 transitions are counted except for
1359 * RI where only 0->1 is counted.
1360 */
1361 case TIOCGICOUNT:
1362 spin_lock_irqsave(&info->slock, flags);
1363 cnow = info->icount;
1364 spin_unlock_irqrestore(&info->slock, flags);
1365 p_cuser = argp;
1366 /* modified by casper 1/11/2000 */
1367 if (put_user(cnow.frame, &p_cuser->frame))
1368 return -EFAULT;
1369 if (put_user(cnow.brk, &p_cuser->brk))
1370 return -EFAULT;
1371 if (put_user(cnow.overrun, &p_cuser->overrun))
1372 return -EFAULT;
1373 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1374 return -EFAULT;
1375 if (put_user(cnow.parity, &p_cuser->parity))
1376 return -EFAULT;
1377 if (put_user(cnow.rx, &p_cuser->rx))
1378 return -EFAULT;
1379 if (put_user(cnow.tx, &p_cuser->tx))
1380 return -EFAULT;
1381 put_user(cnow.cts, &p_cuser->cts);
1382 put_user(cnow.dsr, &p_cuser->dsr);
1383 put_user(cnow.rng, &p_cuser->rng);
1384 put_user(cnow.dcd, &p_cuser->dcd);
1385 return 0;
1386 case MOXA_HighSpeedOn:
1387 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1388 case MOXA_SDS_RSTICOUNTER: {
1389 info->mon_data.rxcnt = 0;
1390 info->mon_data.txcnt = 0;
1391 return 0;
1392 }
1393 /* (above) added by James. */
1394 case MOXA_ASPP_SETBAUD:{
1395 long baud;
1396 if (get_user(baud, (long __user *)argp))
1397 return -EFAULT;
1398 mxser_set_baud(info, baud);
1399 return 0;
1400 }
1401 case MOXA_ASPP_GETBAUD:
1402 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1403 return -EFAULT;
1404
1405 return 0;
1406
1407 case MOXA_ASPP_OQUEUE:{
1408 int len, lsr;
1409
1410 len = mxser_chars_in_buffer(tty);
1411
1412 lsr = inb(info->base + UART_LSR) & UART_LSR_TEMT;
1413
1414 len += (lsr ? 0 : 1);
1415
1416 if (copy_to_user(argp, &len, sizeof(int)))
1417 return -EFAULT;
1418
1419 return 0;
1420 }
1421 case MOXA_ASPP_MON: {
1422 int mcr, status;
1423
1424 /* info->mon_data.ser_param = tty->termios->c_cflag; */
1425
1426 status = mxser_get_msr(info->base, 1, info->port, info);
1427 mxser_check_modem_status(info, status);
1428
1429 mcr = inb(info->base + UART_MCR);
1430 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1431 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1432 else
1433 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1434
1435 if (mcr & MOXA_MUST_MCR_TX_XON)
1436 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1437 else
1438 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1439
1440 if (info->tty->hw_stopped)
1441 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1442 else
1443 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1444
1445 if (copy_to_user(argp, &info->mon_data,
1446 sizeof(struct mxser_mon)))
1447 return -EFAULT;
1448
1449 return 0;
1450 }
1451
1452 case MOXA_ASPP_LSTATUS: {
1453 if (copy_to_user(argp, &info->err_shadow,
1454 sizeof(unsigned char)))
1455 return -EFAULT;
1456
1457 info->err_shadow = 0;
1458 return 0;
1459 }
1460 case MOXA_SET_BAUD_METHOD: {
1461 int method;
1462
1463 if (get_user(method, (int __user *)argp))
1464 return -EFAULT;
1465 mxser_set_baud_method[info->port] = method;
1466 if (copy_to_user(argp, &method, sizeof(int)))
1467 return -EFAULT;
1468
1469 return 0;
1470 }
1471 default:
1472 return -ENOIOCTLCMD;
1473 }
1474 return 0;
1475 }
1476
1477 #ifndef CMSPAR
1478 #define CMSPAR 010000000000
1479 #endif
1480
1481 static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1482 {
1483 int i, result, status;
1484
1485 switch (cmd) {
1486 case MOXA_GET_CONF:
1487 if (copy_to_user(argp, mxsercfg,
1488 sizeof(struct mxser_hwconf) * 4))
1489 return -EFAULT;
1490 return 0;
1491 case MOXA_GET_MAJOR:
1492 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1493 return -EFAULT;
1494 return 0;
1495
1496 case MOXA_GET_CUMAJOR:
1497 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1498 return -EFAULT;
1499 return 0;
1500
1501 case MOXA_CHKPORTENABLE:
1502 result = 0;
1503 for (i = 0; i < MXSER_PORTS; i++) {
1504 if (mxvar_table[i].base)
1505 result |= (1 << i);
1506 }
1507 return put_user(result, (unsigned long __user *)argp);
1508 case MOXA_GETDATACOUNT:
1509 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1510 return -EFAULT;
1511 return 0;
1512 case MOXA_GETMSTATUS:
1513 for (i = 0; i < MXSER_PORTS; i++) {
1514 GMStatus[i].ri = 0;
1515 if (!mxvar_table[i].base) {
1516 GMStatus[i].dcd = 0;
1517 GMStatus[i].dsr = 0;
1518 GMStatus[i].cts = 0;
1519 continue;
1520 }
1521
1522 if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios)
1523 GMStatus[i].cflag = mxvar_table[i].normal_termios.c_cflag;
1524 else
1525 GMStatus[i].cflag = mxvar_table[i].tty->termios->c_cflag;
1526
1527 status = inb(mxvar_table[i].base + UART_MSR);
1528 if (status & 0x80 /*UART_MSR_DCD */ )
1529 GMStatus[i].dcd = 1;
1530 else
1531 GMStatus[i].dcd = 0;
1532
1533 if (status & 0x20 /*UART_MSR_DSR */ )
1534 GMStatus[i].dsr = 1;
1535 else
1536 GMStatus[i].dsr = 0;
1537
1538
1539 if (status & 0x10 /*UART_MSR_CTS */ )
1540 GMStatus[i].cts = 1;
1541 else
1542 GMStatus[i].cts = 0;
1543 }
1544 if (copy_to_user(argp, GMStatus,
1545 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1546 return -EFAULT;
1547 return 0;
1548 case MOXA_ASPP_MON_EXT: {
1549 int status;
1550 int opmode, p;
1551 int shiftbit;
1552 unsigned cflag, iflag;
1553
1554 for (i = 0; i < MXSER_PORTS; i++) {
1555 if (!mxvar_table[i].base)
1556 continue;
1557
1558 status = mxser_get_msr(mxvar_table[i].base, 0,
1559 i, &(mxvar_table[i]));
1560 /*
1561 mxser_check_modem_status(&mxvar_table[i],
1562 status);
1563 */
1564 if (status & UART_MSR_TERI)
1565 mxvar_table[i].icount.rng++;
1566 if (status & UART_MSR_DDSR)
1567 mxvar_table[i].icount.dsr++;
1568 if (status & UART_MSR_DDCD)
1569 mxvar_table[i].icount.dcd++;
1570 if (status & UART_MSR_DCTS)
1571 mxvar_table[i].icount.cts++;
1572
1573 mxvar_table[i].mon_data.modem_status = status;
1574 mon_data_ext.rx_cnt[i] = mxvar_table[i].mon_data.rxcnt;
1575 mon_data_ext.tx_cnt[i] = mxvar_table[i].mon_data.txcnt;
1576 mon_data_ext.up_rxcnt[i] = mxvar_table[i].mon_data.up_rxcnt;
1577 mon_data_ext.up_txcnt[i] = mxvar_table[i].mon_data.up_txcnt;
1578 mon_data_ext.modem_status[i] = mxvar_table[i].mon_data.modem_status;
1579 mon_data_ext.baudrate[i] = mxvar_table[i].realbaud;
1580
1581 if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios) {
1582 cflag = mxvar_table[i].normal_termios.c_cflag;
1583 iflag = mxvar_table[i].normal_termios.c_iflag;
1584 } else {
1585 cflag = mxvar_table[i].tty->termios->c_cflag;
1586 iflag = mxvar_table[i].tty->termios->c_iflag;
1587 }
1588
1589 mon_data_ext.databits[i] = cflag & CSIZE;
1590
1591 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1592
1593 mon_data_ext.parity[i] = cflag & (PARENB | PARODD | CMSPAR);
1594
1595 mon_data_ext.flowctrl[i] = 0x00;
1596
1597 if (cflag & CRTSCTS)
1598 mon_data_ext.flowctrl[i] |= 0x03;
1599
1600 if (iflag & (IXON | IXOFF))
1601 mon_data_ext.flowctrl[i] |= 0x0C;
1602
1603 if (mxvar_table[i].type == PORT_16550A)
1604 mon_data_ext.fifo[i] = 1;
1605 else
1606 mon_data_ext.fifo[i] = 0;
1607
1608 p = i % 4;
1609 shiftbit = p * 2;
1610 opmode = inb(mxvar_table[i].opmode_ioaddr) >> shiftbit;
1611 opmode &= OP_MODE_MASK;
1612
1613 mon_data_ext.iftype[i] = opmode;
1614
1615 }
1616 if (copy_to_user(argp, &mon_data_ext, sizeof(struct mxser_mon_ext)))
1617 return -EFAULT;
1618
1619 return 0;
1620
1621 }
1622 default:
1623 return -ENOIOCTLCMD;
1624 }
1625 return 0;
1626 }
1627
1628 static void mxser_stoprx(struct tty_struct *tty)
1629 {
1630 struct mxser_struct *info = tty->driver_data;
1631 /* unsigned long flags; */
1632
1633 info->ldisc_stop_rx = 1;
1634 if (I_IXOFF(tty)) {
1635 /* MX_LOCK(&info->slock); */
1636 /* following add by Victor Yu. 09-02-2002 */
1637 if (info->IsMoxaMustChipFlag) {
1638 info->IER &= ~MOXA_MUST_RECV_ISR;
1639 outb(info->IER, info->base + UART_IER);
1640 } else {
1641 /* above add by Victor Yu. 09-02-2002 */
1642 info->x_char = STOP_CHAR(tty);
1643 /* mask by Victor Yu. 09-02-2002 */
1644 /* outb(info->IER, 0); */
1645 outb(0, info->base + UART_IER);
1646 info->IER |= UART_IER_THRI;
1647 /* force Tx interrupt */
1648 outb(info->IER, info->base + UART_IER);
1649 } /* add by Victor Yu. 09-02-2002 */
1650 /* MX_UNLOCK(&info->slock); */
1651 }
1652
1653 if (info->tty->termios->c_cflag & CRTSCTS) {
1654 /* MX_LOCK(&info->slock); */
1655 info->MCR &= ~UART_MCR_RTS;
1656 outb(info->MCR, info->base + UART_MCR);
1657 /* MX_UNLOCK(&info->slock); */
1658 }
1659 }
1660
1661 static void mxser_startrx(struct tty_struct *tty)
1662 {
1663 struct mxser_struct *info = tty->driver_data;
1664 /* unsigned long flags; */
1665
1666 info->ldisc_stop_rx = 0;
1667 if (I_IXOFF(tty)) {
1668 if (info->x_char)
1669 info->x_char = 0;
1670 else {
1671 /* MX_LOCK(&info->slock); */
1672
1673 /* following add by Victor Yu. 09-02-2002 */
1674 if (info->IsMoxaMustChipFlag) {
1675 info->IER |= MOXA_MUST_RECV_ISR;
1676 outb(info->IER, info->base + UART_IER);
1677 } else {
1678 /* above add by Victor Yu. 09-02-2002 */
1679
1680 info->x_char = START_CHAR(tty);
1681 /* mask by Victor Yu. 09-02-2002 */
1682 /* outb(info->IER, 0); */
1683 /* add by Victor Yu. 09-02-2002 */
1684 outb(0, info->base + UART_IER);
1685 /* force Tx interrupt */
1686 info->IER |= UART_IER_THRI;
1687 outb(info->IER, info->base + UART_IER);
1688 } /* add by Victor Yu. 09-02-2002 */
1689 /* MX_UNLOCK(&info->slock); */
1690 }
1691 }
1692
1693 if (info->tty->termios->c_cflag & CRTSCTS) {
1694 /* MX_LOCK(&info->slock); */
1695 info->MCR |= UART_MCR_RTS;
1696 outb(info->MCR, info->base + UART_MCR);
1697 /* MX_UNLOCK(&info->slock); */
1698 }
1699 }
1700
1701 /*
1702 * This routine is called by the upper-layer tty layer to signal that
1703 * incoming characters should be throttled.
1704 */
1705 static void mxser_throttle(struct tty_struct *tty)
1706 {
1707 /* struct mxser_struct *info = tty->driver_data; */
1708 /* unsigned long flags; */
1709
1710 /* MX_LOCK(&info->slock); */
1711 mxser_stoprx(tty);
1712 /* MX_UNLOCK(&info->slock); */
1713 }
1714
1715 static void mxser_unthrottle(struct tty_struct *tty)
1716 {
1717 /* struct mxser_struct *info = tty->driver_data; */
1718 /* unsigned long flags; */
1719
1720 /* MX_LOCK(&info->slock); */
1721 mxser_startrx(tty);
1722 /* MX_UNLOCK(&info->slock); */
1723 }
1724
1725 static void mxser_set_termios(struct tty_struct *tty, struct ktermios *old_termios)
1726 {
1727 struct mxser_struct *info = tty->driver_data;
1728 unsigned long flags;
1729
1730 mxser_change_speed(info, old_termios);
1731
1732 if ((old_termios->c_cflag & CRTSCTS) &&
1733 !(tty->termios->c_cflag & CRTSCTS)) {
1734 tty->hw_stopped = 0;
1735 mxser_start(tty);
1736 }
1737
1738 /* Handle sw stopped */
1739 if ((old_termios->c_iflag & IXON) &&
1740 !(tty->termios->c_iflag & IXON)) {
1741 tty->stopped = 0;
1742
1743 /* following add by Victor Yu. 09-02-2002 */
1744 if (info->IsMoxaMustChipFlag) {
1745 spin_lock_irqsave(&info->slock, flags);
1746 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
1747 spin_unlock_irqrestore(&info->slock, flags);
1748 }
1749 /* above add by Victor Yu. 09-02-2002 */
1750
1751 mxser_start(tty);
1752 }
1753 }
1754
1755 /*
1756 * mxser_stop() and mxser_start()
1757 *
1758 * This routines are called before setting or resetting tty->stopped.
1759 * They enable or disable transmitter interrupts, as necessary.
1760 */
1761 static void mxser_stop(struct tty_struct *tty)
1762 {
1763 struct mxser_struct *info = tty->driver_data;
1764 unsigned long flags;
1765
1766 spin_lock_irqsave(&info->slock, flags);
1767 if (info->IER & UART_IER_THRI) {
1768 info->IER &= ~UART_IER_THRI;
1769 outb(info->IER, info->base + UART_IER);
1770 }
1771 spin_unlock_irqrestore(&info->slock, flags);
1772 }
1773
1774 static void mxser_start(struct tty_struct *tty)
1775 {
1776 struct mxser_struct *info = tty->driver_data;
1777 unsigned long flags;
1778
1779 spin_lock_irqsave(&info->slock, flags);
1780 if (info->xmit_cnt && info->xmit_buf && !(info->IER & UART_IER_THRI)) {
1781 info->IER |= UART_IER_THRI;
1782 outb(info->IER, info->base + UART_IER);
1783 }
1784 spin_unlock_irqrestore(&info->slock, flags);
1785 }
1786
1787 /*
1788 * mxser_wait_until_sent() --- wait until the transmitter is empty
1789 */
1790 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1791 {
1792 struct mxser_struct *info = tty->driver_data;
1793 unsigned long orig_jiffies, char_time;
1794 int lsr;
1795
1796 if (info->type == PORT_UNKNOWN)
1797 return;
1798
1799 if (info->xmit_fifo_size == 0)
1800 return; /* Just in case.... */
1801
1802 orig_jiffies = jiffies;
1803 /*
1804 * Set the check interval to be 1/5 of the estimated time to
1805 * send a single character, and make it at least 1. The check
1806 * interval should also be less than the timeout.
1807 *
1808 * Note: we have to use pretty tight timings here to satisfy
1809 * the NIST-PCTS.
1810 */
1811 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1812 char_time = char_time / 5;
1813 if (char_time == 0)
1814 char_time = 1;
1815 if (timeout && timeout < char_time)
1816 char_time = timeout;
1817 /*
1818 * If the transmitter hasn't cleared in twice the approximate
1819 * amount of time to send the entire FIFO, it probably won't
1820 * ever clear. This assumes the UART isn't doing flow
1821 * control, which is currently the case. Hence, if it ever
1822 * takes longer than info->timeout, this is probably due to a
1823 * UART bug of some kind. So, we clamp the timeout parameter at
1824 * 2*info->timeout.
1825 */
1826 if (!timeout || timeout > 2 * info->timeout)
1827 timeout = 2 * info->timeout;
1828 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1829 printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
1830 timeout, char_time);
1831 printk("jiff=%lu...", jiffies);
1832 #endif
1833 while (!((lsr = inb(info->base + UART_LSR)) & UART_LSR_TEMT)) {
1834 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1835 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1836 #endif
1837 schedule_timeout_interruptible(char_time);
1838 if (signal_pending(current))
1839 break;
1840 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1841 break;
1842 }
1843 set_current_state(TASK_RUNNING);
1844
1845 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1846 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1847 #endif
1848 }
1849
1850
1851 /*
1852 * This routine is called by tty_hangup() when a hangup is signaled.
1853 */
1854 void mxser_hangup(struct tty_struct *tty)
1855 {
1856 struct mxser_struct *info = tty->driver_data;
1857
1858 mxser_flush_buffer(tty);
1859 mxser_shutdown(info);
1860 info->event = 0;
1861 info->count = 0;
1862 info->flags &= ~ASYNC_NORMAL_ACTIVE;
1863 info->tty = NULL;
1864 wake_up_interruptible(&info->open_wait);
1865 }
1866
1867
1868 /* added by James 03-12-2004. */
1869 /*
1870 * mxser_rs_break() --- routine which turns the break handling on or off
1871 */
1872 static void mxser_rs_break(struct tty_struct *tty, int break_state)
1873 {
1874 struct mxser_struct *info = tty->driver_data;
1875 unsigned long flags;
1876
1877 spin_lock_irqsave(&info->slock, flags);
1878 if (break_state == -1)
1879 outb(inb(info->base + UART_LCR) | UART_LCR_SBC,
1880 info->base + UART_LCR);
1881 else
1882 outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC,
1883 info->base + UART_LCR);
1884 spin_unlock_irqrestore(&info->slock, flags);
1885 }
1886
1887 /* (above) added by James. */
1888
1889
1890 /*
1891 * This is the serial driver's generic interrupt routine
1892 */
1893 static irqreturn_t mxser_interrupt(int irq, void *dev_id)
1894 {
1895 int status, iir, i;
1896 struct mxser_struct *info;
1897 struct mxser_struct *port;
1898 int max, irqbits, bits, msr;
1899 int pass_counter = 0;
1900 int handled = IRQ_NONE;
1901
1902 port = NULL;
1903 /* spin_lock(&gm_lock); */
1904
1905 for (i = 0; i < MXSER_BOARDS; i++) {
1906 if (dev_id == &(mxvar_table[i * MXSER_PORTS_PER_BOARD])) {
1907 port = dev_id;
1908 break;
1909 }
1910 }
1911
1912 if (i == MXSER_BOARDS)
1913 goto irq_stop;
1914 if (port == 0)
1915 goto irq_stop;
1916 max = mxser_numports[mxsercfg[i].board_type - 1];
1917 while (1) {
1918 irqbits = inb(port->vector) & port->vectormask;
1919 if (irqbits == port->vectormask)
1920 break;
1921
1922 handled = IRQ_HANDLED;
1923 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
1924 if (irqbits == port->vectormask)
1925 break;
1926 if (bits & irqbits)
1927 continue;
1928 info = port + i;
1929
1930 /* following add by Victor Yu. 09-13-2002 */
1931 iir = inb(info->base + UART_IIR);
1932 if (iir & UART_IIR_NO_INT)
1933 continue;
1934 iir &= MOXA_MUST_IIR_MASK;
1935 if (!info->tty) {
1936 status = inb(info->base + UART_LSR);
1937 outb(0x27, info->base + UART_FCR);
1938 inb(info->base + UART_MSR);
1939 continue;
1940 }
1941
1942 /* mask by Victor Yu. 09-13-2002
1943 if ( !info->tty ||
1944 (inb(info->base + UART_IIR) & UART_IIR_NO_INT) )
1945 continue;
1946 */
1947 /* mask by Victor Yu. 09-02-2002
1948 status = inb(info->base + UART_LSR) & info->read_status_mask;
1949 */
1950
1951 /* following add by Victor Yu. 09-02-2002 */
1952 status = inb(info->base + UART_LSR);
1953
1954 if (status & UART_LSR_PE)
1955 info->err_shadow |= NPPI_NOTIFY_PARITY;
1956 if (status & UART_LSR_FE)
1957 info->err_shadow |= NPPI_NOTIFY_FRAMING;
1958 if (status & UART_LSR_OE)
1959 info->err_shadow |= NPPI_NOTIFY_HW_OVERRUN;
1960 if (status & UART_LSR_BI)
1961 info->err_shadow |= NPPI_NOTIFY_BREAK;
1962
1963 if (info->IsMoxaMustChipFlag) {
1964 /*
1965 if ( (status & 0x02) && !(status & 0x01) ) {
1966 outb(info->base+UART_FCR, 0x23);
1967 continue;
1968 }
1969 */
1970 if (iir == MOXA_MUST_IIR_GDA ||
1971 iir == MOXA_MUST_IIR_RDA ||
1972 iir == MOXA_MUST_IIR_RTO ||
1973 iir == MOXA_MUST_IIR_LSR)
1974 mxser_receive_chars(info, &status);
1975
1976 } else {
1977 /* above add by Victor Yu. 09-02-2002 */
1978
1979 status &= info->read_status_mask;
1980 if (status & UART_LSR_DR)
1981 mxser_receive_chars(info, &status);
1982 }
1983 msr = inb(info->base + UART_MSR);
1984 if (msr & UART_MSR_ANY_DELTA) {
1985 mxser_check_modem_status(info, msr);
1986 }
1987 /* following add by Victor Yu. 09-13-2002 */
1988 if (info->IsMoxaMustChipFlag) {
1989 if ((iir == 0x02) && (status & UART_LSR_THRE)) {
1990 mxser_transmit_chars(info);
1991 }
1992 } else {
1993 /* above add by Victor Yu. 09-13-2002 */
1994
1995 if (status & UART_LSR_THRE) {
1996 /* 8-2-99 by William
1997 if ( info->x_char || (info->xmit_cnt > 0) )
1998 */
1999 mxser_transmit_chars(info);
2000 }
2001 }
2002 }
2003 if (pass_counter++ > MXSER_ISR_PASS_LIMIT) {
2004 break; /* Prevent infinite loops */
2005 }
2006 }
2007
2008 irq_stop:
2009 /* spin_unlock(&gm_lock); */
2010 return handled;
2011 }
2012
2013 static void mxser_receive_chars(struct mxser_struct *info, int *status)
2014 {
2015 struct tty_struct *tty = info->tty;
2016 unsigned char ch, gdl;
2017 int ignored = 0;
2018 int cnt = 0;
2019 int recv_room;
2020 int max = 256;
2021 unsigned long flags;
2022
2023 spin_lock_irqsave(&info->slock, flags);
2024
2025 recv_room = tty->receive_room;
2026 if ((recv_room == 0) && (!info->ldisc_stop_rx)) {
2027 /* mxser_throttle(tty); */
2028 mxser_stoprx(tty);
2029 /* return; */
2030 }
2031
2032 /* following add by Victor Yu. 09-02-2002 */
2033 if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
2034
2035 if (*status & UART_LSR_SPECIAL) {
2036 goto intr_old;
2037 }
2038 /* following add by Victor Yu. 02-11-2004 */
2039 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID &&
2040 (*status & MOXA_MUST_LSR_RERR))
2041 goto intr_old;
2042 /* above add by Victor Yu. 02-14-2004 */
2043 if (*status & MOXA_MUST_LSR_RERR)
2044 goto intr_old;
2045
2046 gdl = inb(info->base + MOXA_MUST_GDL_REGISTER);
2047
2048 /* add by Victor Yu. 02-11-2004 */
2049 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU150_HWID)
2050 gdl &= MOXA_MUST_GDL_MASK;
2051 if (gdl >= recv_room) {
2052 if (!info->ldisc_stop_rx) {
2053 /* mxser_throttle(tty); */
2054 mxser_stoprx(tty);
2055 }
2056 /* return; */
2057 }
2058 while (gdl--) {
2059 ch = inb(info->base + UART_RX);
2060 tty_insert_flip_char(tty, ch, 0);
2061 cnt++;
2062 /*
2063 if ((cnt >= HI_WATER) && (info->stop_rx == 0)) {
2064 mxser_stoprx(tty);
2065 info->stop_rx = 1;
2066 break;
2067 } */
2068 }
2069 goto end_intr;
2070 }
2071 intr_old:
2072 /* above add by Victor Yu. 09-02-2002 */
2073
2074 do {
2075 if (max-- < 0)
2076 break;
2077 /*
2078 if ((cnt >= HI_WATER) && (info->stop_rx == 0)) {
2079 mxser_stoprx(tty);
2080 info->stop_rx=1;
2081 break;
2082 }
2083 */
2084
2085 ch = inb(info->base + UART_RX);
2086 /* following add by Victor Yu. 09-02-2002 */
2087 if (info->IsMoxaMustChipFlag && (*status & UART_LSR_OE) /*&& !(*status&UART_LSR_DR) */ )
2088 outb(0x23, info->base + UART_FCR);
2089 *status &= info->read_status_mask;
2090 /* above add by Victor Yu. 09-02-2002 */
2091 if (*status & info->ignore_status_mask) {
2092 if (++ignored > 100)
2093 break;
2094 } else {
2095 char flag = 0;
2096 if (*status & UART_LSR_SPECIAL) {
2097 if (*status & UART_LSR_BI) {
2098 flag = TTY_BREAK;
2099 /* added by casper 1/11/2000 */
2100 info->icount.brk++;
2101 /* */
2102 if (info->flags & ASYNC_SAK)
2103 do_SAK(tty);
2104 } else if (*status & UART_LSR_PE) {
2105 flag = TTY_PARITY;
2106 /* added by casper 1/11/2000 */
2107 info->icount.parity++;
2108 /* */
2109 } else if (*status & UART_LSR_FE) {
2110 flag = TTY_FRAME;
2111 /* added by casper 1/11/2000 */
2112 info->icount.frame++;
2113 /* */
2114 } else if (*status & UART_LSR_OE) {
2115 flag = TTY_OVERRUN;
2116 /* added by casper 1/11/2000 */
2117 info->icount.overrun++;
2118 /* */
2119 }
2120 }
2121 tty_insert_flip_char(tty, ch, flag);
2122 cnt++;
2123 if (cnt >= recv_room) {
2124 if (!info->ldisc_stop_rx) {
2125 /* mxser_throttle(tty); */
2126 mxser_stoprx(tty);
2127 }
2128 break;
2129 }
2130
2131 }
2132
2133 /* following add by Victor Yu. 09-02-2002 */
2134 if (info->IsMoxaMustChipFlag)
2135 break;
2136 /* above add by Victor Yu. 09-02-2002 */
2137
2138 /* mask by Victor Yu. 09-02-2002
2139 *status = inb(info->base + UART_LSR) & info->read_status_mask;
2140 */
2141 /* following add by Victor Yu. 09-02-2002 */
2142 *status = inb(info->base + UART_LSR);
2143 /* above add by Victor Yu. 09-02-2002 */
2144 } while (*status & UART_LSR_DR);
2145
2146 end_intr: /* add by Victor Yu. 09-02-2002 */
2147 mxvar_log.rxcnt[info->port] += cnt;
2148 info->mon_data.rxcnt += cnt;
2149 info->mon_data.up_rxcnt += cnt;
2150 spin_unlock_irqrestore(&info->slock, flags);
2151
2152 tty_flip_buffer_push(tty);
2153 }
2154
2155 static void mxser_transmit_chars(struct mxser_struct *info)
2156 {
2157 int count, cnt;
2158 unsigned long flags;
2159
2160 spin_lock_irqsave(&info->slock, flags);
2161
2162 if (info->x_char) {
2163 outb(info->x_char, info->base + UART_TX);
2164 info->x_char = 0;
2165 mxvar_log.txcnt[info->port]++;
2166 info->mon_data.txcnt++;
2167 info->mon_data.up_txcnt++;
2168
2169 /* added by casper 1/11/2000 */
2170 info->icount.tx++;
2171 /* */
2172 spin_unlock_irqrestore(&info->slock, flags);
2173 return;
2174 }
2175
2176 if (info->xmit_buf == 0) {
2177 spin_unlock_irqrestore(&info->slock, flags);
2178 return;
2179 }
2180
2181 if ((info->xmit_cnt <= 0) || info->tty->stopped ||
2182 (info->tty->hw_stopped &&
2183 (info->type != PORT_16550A) &&
2184 (!info->IsMoxaMustChipFlag))) {
2185 info->IER &= ~UART_IER_THRI;
2186 outb(info->IER, info->base + UART_IER);
2187 spin_unlock_irqrestore(&info->slock, flags);
2188 return;
2189 }
2190
2191 cnt = info->xmit_cnt;
2192 count = info->xmit_fifo_size;
2193 do {
2194 outb(info->xmit_buf[info->xmit_tail++],
2195 info->base + UART_TX);
2196 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2197 if (--info->xmit_cnt <= 0)
2198 break;
2199 } while (--count > 0);
2200 mxvar_log.txcnt[info->port] += (cnt - info->xmit_cnt);
2201
2202 /* added by James 03-12-2004. */
2203 info->mon_data.txcnt += (cnt - info->xmit_cnt);
2204 info->mon_data.up_txcnt += (cnt - info->xmit_cnt);
2205 /* (above) added by James. */
2206
2207 /* added by casper 1/11/2000 */
2208 info->icount.tx += (cnt - info->xmit_cnt);
2209 /* */
2210
2211 if (info->xmit_cnt < WAKEUP_CHARS) {
2212 set_bit(MXSER_EVENT_TXLOW, &info->event);
2213 schedule_work(&info->tqueue);
2214 }
2215 if (info->xmit_cnt <= 0) {
2216 info->IER &= ~UART_IER_THRI;
2217 outb(info->IER, info->base + UART_IER);
2218 }
2219 spin_unlock_irqrestore(&info->slock, flags);
2220 }
2221
2222 static void mxser_check_modem_status(struct mxser_struct *info, int status)
2223 {
2224 /* update input line counters */
2225 if (status & UART_MSR_TERI)
2226 info->icount.rng++;
2227 if (status & UART_MSR_DDSR)
2228 info->icount.dsr++;
2229 if (status & UART_MSR_DDCD)
2230 info->icount.dcd++;
2231 if (status & UART_MSR_DCTS)
2232 info->icount.cts++;
2233 info->mon_data.modem_status = status;
2234 wake_up_interruptible(&info->delta_msr_wait);
2235
2236 if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
2237 if (status & UART_MSR_DCD)
2238 wake_up_interruptible(&info->open_wait);
2239 schedule_work(&info->tqueue);
2240 }
2241
2242 if (info->flags & ASYNC_CTS_FLOW) {
2243 if (info->tty->hw_stopped) {
2244 if (status & UART_MSR_CTS) {
2245 info->tty->hw_stopped = 0;
2246
2247 if ((info->type != PORT_16550A) &&
2248 (!info->IsMoxaMustChipFlag)) {
2249 info->IER |= UART_IER_THRI;
2250 outb(info->IER, info->base + UART_IER);
2251 }
2252 set_bit(MXSER_EVENT_TXLOW, &info->event);
2253 schedule_work(&info->tqueue); }
2254 } else {
2255 if (!(status & UART_MSR_CTS)) {
2256 info->tty->hw_stopped = 1;
2257 if ((info->type != PORT_16550A) &&
2258 (!info->IsMoxaMustChipFlag)) {
2259 info->IER &= ~UART_IER_THRI;
2260 outb(info->IER, info->base + UART_IER);
2261 }
2262 }
2263 }
2264 }
2265 }
2266
2267 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, struct mxser_struct *info)
2268 {
2269 DECLARE_WAITQUEUE(wait, current);
2270 int retval;
2271 int do_clocal = 0;
2272 unsigned long flags;
2273
2274 /*
2275 * If non-blocking mode is set, or the port is not enabled,
2276 * then make the check up front and then exit.
2277 */
2278 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2279 info->flags |= ASYNC_NORMAL_ACTIVE;
2280 return 0;
2281 }
2282
2283 if (tty->termios->c_cflag & CLOCAL)
2284 do_clocal = 1;
2285
2286 /*
2287 * Block waiting for the carrier detect and the line to become
2288 * free (i.e., not in use by the callout). While we are in
2289 * this loop, info->count is dropped by one, so that
2290 * mxser_close() knows when to free things. We restore it upon
2291 * exit, either normal or abnormal.
2292 */
2293 retval = 0;
2294 add_wait_queue(&info->open_wait, &wait);
2295
2296 spin_lock_irqsave(&info->slock, flags);
2297 if (!tty_hung_up_p(filp))
2298 info->count--;
2299 spin_unlock_irqrestore(&info->slock, flags);
2300 info->blocked_open++;
2301 while (1) {
2302 spin_lock_irqsave(&info->slock, flags);
2303 outb(inb(info->base + UART_MCR) |
2304 UART_MCR_DTR | UART_MCR_RTS, info->base + UART_MCR);
2305 spin_unlock_irqrestore(&info->slock, flags);
2306 set_current_state(TASK_INTERRUPTIBLE);
2307 if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)) {
2308 if (info->flags & ASYNC_HUP_NOTIFY)
2309 retval = -EAGAIN;
2310 else
2311 retval = -ERESTARTSYS;
2312 break;
2313 }
2314 if (!(info->flags & ASYNC_CLOSING) &&
2315 (do_clocal ||
2316 (inb(info->base + UART_MSR) & UART_MSR_DCD)))
2317 break;
2318 if (signal_pending(current)) {
2319 retval = -ERESTARTSYS;
2320 break;
2321 }
2322 schedule();
2323 }
2324 set_current_state(TASK_RUNNING);
2325 remove_wait_queue(&info->open_wait, &wait);
2326 if (!tty_hung_up_p(filp))
2327 info->count++;
2328 info->blocked_open--;
2329 if (retval)
2330 return retval;
2331 info->flags |= ASYNC_NORMAL_ACTIVE;
2332 return 0;
2333 }
2334
2335 static int mxser_startup(struct mxser_struct *info)
2336 {
2337 unsigned long page;
2338 unsigned long flags;
2339
2340 page = __get_free_page(GFP_KERNEL);
2341 if (!page)
2342 return -ENOMEM;
2343
2344 spin_lock_irqsave(&info->slock, flags);
2345
2346 if (info->flags & ASYNC_INITIALIZED) {
2347 free_page(page);
2348 spin_unlock_irqrestore(&info->slock, flags);
2349 return 0;
2350 }
2351
2352 if (!info->base || !info->type) {
2353 if (info->tty)
2354 set_bit(TTY_IO_ERROR, &info->tty->flags);
2355 free_page(page);
2356 spin_unlock_irqrestore(&info->slock, flags);
2357 return 0;
2358 }
2359 if (info->xmit_buf)
2360 free_page(page);
2361 else
2362 info->xmit_buf = (unsigned char *) page;
2363
2364 /*
2365 * Clear the FIFO buffers and disable them
2366 * (they will be reenabled in mxser_change_speed())
2367 */
2368 if (info->IsMoxaMustChipFlag)
2369 outb((UART_FCR_CLEAR_RCVR |
2370 UART_FCR_CLEAR_XMIT |
2371 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2372 else
2373 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
2374 info->base + UART_FCR);
2375
2376 /*
2377 * At this point there's no way the LSR could still be 0xFF;
2378 * if it is, then bail out, because there's likely no UART
2379 * here.
2380 */
2381 if (inb(info->base + UART_LSR) == 0xff) {
2382 spin_unlock_irqrestore(&info->slock, flags);
2383 if (capable(CAP_SYS_ADMIN)) {
2384 if (info->tty)
2385 set_bit(TTY_IO_ERROR, &info->tty->flags);
2386 return 0;
2387 } else
2388 return -ENODEV;
2389 }
2390
2391 /*
2392 * Clear the interrupt registers.
2393 */
2394 (void) inb(info->base + UART_LSR);
2395 (void) inb(info->base + UART_RX);
2396 (void) inb(info->base + UART_IIR);
2397 (void) inb(info->base + UART_MSR);
2398
2399 /*
2400 * Now, initialize the UART
2401 */
2402 outb(UART_LCR_WLEN8, info->base + UART_LCR); /* reset DLAB */
2403 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
2404 outb(info->MCR, info->base + UART_MCR);
2405
2406 /*
2407 * Finally, enable interrupts
2408 */
2409 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
2410 /* info->IER = UART_IER_RLSI | UART_IER_RDI; */
2411
2412 /* following add by Victor Yu. 08-30-2002 */
2413 if (info->IsMoxaMustChipFlag)
2414 info->IER |= MOXA_MUST_IER_EGDAI;
2415 /* above add by Victor Yu. 08-30-2002 */
2416 outb(info->IER, info->base + UART_IER); /* enable interrupts */
2417
2418 /*
2419 * And clear the interrupt registers again for luck.
2420 */
2421 (void) inb(info->base + UART_LSR);
2422 (void) inb(info->base + UART_RX);
2423 (void) inb(info->base + UART_IIR);
2424 (void) inb(info->base + UART_MSR);
2425
2426 if (info->tty)
2427 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2428 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2429
2430 /*
2431 * and set the speed of the serial port
2432 */
2433 spin_unlock_irqrestore(&info->slock, flags);
2434 mxser_change_speed(info, NULL);
2435
2436 info->flags |= ASYNC_INITIALIZED;
2437 return 0;
2438 }
2439
2440 /*
2441 * This routine will shutdown a serial port; interrupts maybe disabled, and
2442 * DTR is dropped if the hangup on close termio flag is on.
2443 */
2444 static void mxser_shutdown(struct mxser_struct *info)
2445 {
2446 unsigned long flags;
2447
2448 if (!(info->flags & ASYNC_INITIALIZED))
2449 return;
2450
2451 spin_lock_irqsave(&info->slock, flags);
2452
2453 /*
2454 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
2455 * here so the queue might never be waken up
2456 */
2457 wake_up_interruptible(&info->delta_msr_wait);
2458
2459 /*
2460 * Free the IRQ, if necessary
2461 */
2462 if (info->xmit_buf) {
2463 free_page((unsigned long) info->xmit_buf);
2464 info->xmit_buf = NULL;
2465 }
2466
2467 info->IER = 0;
2468 outb(0x00, info->base + UART_IER);
2469
2470 if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
2471 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
2472 outb(info->MCR, info->base + UART_MCR);
2473
2474 /* clear Rx/Tx FIFO's */
2475 /* following add by Victor Yu. 08-30-2002 */
2476 if (info->IsMoxaMustChipFlag)
2477 outb((UART_FCR_CLEAR_RCVR |
2478 UART_FCR_CLEAR_XMIT |
2479 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2480 else
2481 /* above add by Victor Yu. 08-30-2002 */
2482 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
2483 info->base + UART_FCR);
2484
2485 /* read data port to reset things */
2486 (void) inb(info->base + UART_RX);
2487
2488 if (info->tty)
2489 set_bit(TTY_IO_ERROR, &info->tty->flags);
2490
2491 info->flags &= ~ASYNC_INITIALIZED;
2492
2493 /* following add by Victor Yu. 09-23-2002 */
2494 if (info->IsMoxaMustChipFlag)
2495 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->base);
2496 /* above add by Victor Yu. 09-23-2002 */
2497
2498 spin_unlock_irqrestore(&info->slock, flags);
2499 }
2500
2501 /*
2502 * This routine is called to set the UART divisor registers to match
2503 * the specified baud rate for a serial port.
2504 */
2505 static int mxser_change_speed(struct mxser_struct *info, struct ktermios *old_termios)
2506 {
2507 unsigned cflag, cval, fcr;
2508 int ret = 0;
2509 unsigned char status;
2510 long baud;
2511 unsigned long flags;
2512
2513 if (!info->tty || !info->tty->termios)
2514 return ret;
2515 cflag = info->tty->termios->c_cflag;
2516 if (!(info->base))
2517 return ret;
2518
2519 #ifndef B921600
2520 #define B921600 (B460800 +1)
2521 #endif
2522 if (mxser_set_baud_method[info->port] == 0) {
2523 baud = tty_get_baud_rate(info->tty);
2524 mxser_set_baud(info, baud);
2525 }
2526
2527 /* byte size and parity */
2528 switch (cflag & CSIZE) {
2529 case CS5:
2530 cval = 0x00;
2531 break;
2532 case CS6:
2533 cval = 0x01;
2534 break;
2535 case CS7:
2536 cval = 0x02;
2537 break;
2538 case CS8:
2539 cval = 0x03;
2540 break;
2541 default:
2542 cval = 0x00;
2543 break; /* too keep GCC shut... */
2544 }
2545 if (cflag & CSTOPB)
2546 cval |= 0x04;
2547 if (cflag & PARENB)
2548 cval |= UART_LCR_PARITY;
2549 if (!(cflag & PARODD))
2550 cval |= UART_LCR_EPAR;
2551 if (cflag & CMSPAR)
2552 cval |= UART_LCR_SPAR;
2553
2554 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
2555 if (info->IsMoxaMustChipFlag) {
2556 fcr = UART_FCR_ENABLE_FIFO;
2557 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2558 SET_MOXA_MUST_FIFO_VALUE(info);
2559 } else
2560 fcr = 0;
2561 } else {
2562 fcr = UART_FCR_ENABLE_FIFO;
2563 /* following add by Victor Yu. 08-30-2002 */
2564 if (info->IsMoxaMustChipFlag) {
2565 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2566 SET_MOXA_MUST_FIFO_VALUE(info);
2567 } else {
2568 /* above add by Victor Yu. 08-30-2002 */
2569 switch (info->rx_trigger) {
2570 case 1:
2571 fcr |= UART_FCR_TRIGGER_1;
2572 break;
2573 case 4:
2574 fcr |= UART_FCR_TRIGGER_4;
2575 break;
2576 case 8:
2577 fcr |= UART_FCR_TRIGGER_8;
2578 break;
2579 default:
2580 fcr |= UART_FCR_TRIGGER_14;
2581 break;
2582 }
2583 }
2584 }
2585
2586 /* CTS flow control flag and modem status interrupts */
2587 info->IER &= ~UART_IER_MSI;
2588 info->MCR &= ~UART_MCR_AFE;
2589 if (cflag & CRTSCTS) {
2590 info->flags |= ASYNC_CTS_FLOW;
2591 info->IER |= UART_IER_MSI;
2592 if ((info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
2593 info->MCR |= UART_MCR_AFE;
2594 } else {
2595 status = inb(info->base + UART_MSR);
2596 if (info->tty->hw_stopped) {
2597 if (status & UART_MSR_CTS) {
2598 info->tty->hw_stopped = 0;
2599 if ((info->type != PORT_16550A) &&
2600 (!info->IsMoxaMustChipFlag)) {
2601 info->IER |= UART_IER_THRI;
2602 outb(info->IER, info->base + UART_IER);
2603 }
2604 set_bit(MXSER_EVENT_TXLOW, &info->event);
2605 schedule_work(&info->tqueue); }
2606 } else {
2607 if (!(status & UART_MSR_CTS)) {
2608 info->tty->hw_stopped = 1;
2609 if ((info->type != PORT_16550A) &&
2610 (!info->IsMoxaMustChipFlag)) {
2611 info->IER &= ~UART_IER_THRI;
2612 outb(info->IER, info->base + UART_IER);
2613 }
2614 }
2615 }
2616 }
2617 } else {
2618 info->flags &= ~ASYNC_CTS_FLOW;
2619 }
2620 outb(info->MCR, info->base + UART_MCR);
2621 if (cflag & CLOCAL) {
2622 info->flags &= ~ASYNC_CHECK_CD;
2623 } else {
2624 info->flags |= ASYNC_CHECK_CD;
2625 info->IER |= UART_IER_MSI;
2626 }
2627 outb(info->IER, info->base + UART_IER);
2628
2629 /*
2630 * Set up parity check flag
2631 */
2632 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
2633 if (I_INPCK(info->tty))
2634 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
2635 if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
2636 info->read_status_mask |= UART_LSR_BI;
2637
2638 info->ignore_status_mask = 0;
2639
2640 if (I_IGNBRK(info->tty)) {
2641 info->ignore_status_mask |= UART_LSR_BI;
2642 info->read_status_mask |= UART_LSR_BI;
2643 /*
2644 * If we're ignore parity and break indicators, ignore
2645 * overruns too. (For real raw support).
2646 */
2647 if (I_IGNPAR(info->tty)) {
2648 info->ignore_status_mask |=
2649 UART_LSR_OE |
2650 UART_LSR_PE |
2651 UART_LSR_FE;
2652 info->read_status_mask |=
2653 UART_LSR_OE |
2654 UART_LSR_PE |
2655 UART_LSR_FE;
2656 }
2657 }
2658 /* following add by Victor Yu. 09-02-2002 */
2659 if (info->IsMoxaMustChipFlag) {
2660 spin_lock_irqsave(&info->slock, flags);
2661 SET_MOXA_MUST_XON1_VALUE(info->base, START_CHAR(info->tty));
2662 SET_MOXA_MUST_XOFF1_VALUE(info->base, STOP_CHAR(info->tty));
2663 if (I_IXON(info->tty)) {
2664 ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2665 } else {
2666 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2667 }
2668 if (I_IXOFF(info->tty)) {
2669 ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2670 } else {
2671 DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2672 }
2673 /*
2674 if ( I_IXANY(info->tty) ) {
2675 info->MCR |= MOXA_MUST_MCR_XON_ANY;
2676 ENABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2677 } else {
2678 info->MCR &= ~MOXA_MUST_MCR_XON_ANY;
2679 DISABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2680 }
2681 */
2682 spin_unlock_irqrestore(&info->slock, flags);
2683 }
2684 /* above add by Victor Yu. 09-02-2002 */
2685
2686
2687 outb(fcr, info->base + UART_FCR); /* set fcr */
2688 outb(cval, info->base + UART_LCR);
2689
2690 return ret;
2691 }
2692
2693
2694 static int mxser_set_baud(struct mxser_struct *info, long newspd)
2695 {
2696 int quot = 0;
2697 unsigned char cval;
2698 int ret = 0;
2699 unsigned long flags;
2700
2701 if (!info->tty || !info->tty->termios)
2702 return ret;
2703
2704 if (!(info->base))
2705 return ret;
2706
2707 if (newspd > info->MaxCanSetBaudRate)
2708 return 0;
2709
2710 info->realbaud = newspd;
2711 if (newspd == 134) {
2712 quot = (2 * info->baud_base / 269);
2713 } else if (newspd) {
2714 quot = info->baud_base / newspd;
2715 if (quot == 0)
2716 quot = 1;
2717 } else {
2718 quot = 0;
2719 }
2720
2721 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
2722 info->timeout += HZ / 50; /* Add .02 seconds of slop */
2723
2724 if (quot) {
2725 spin_lock_irqsave(&info->slock, flags);
2726 info->MCR |= UART_MCR_DTR;
2727 outb(info->MCR, info->base + UART_MCR);
2728 spin_unlock_irqrestore(&info->slock, flags);
2729 } else {
2730 spin_lock_irqsave(&info->slock, flags);
2731 info->MCR &= ~UART_MCR_DTR;
2732 outb(info->MCR, info->base + UART_MCR);
2733 spin_unlock_irqrestore(&info->slock, flags);
2734 return ret;
2735 }
2736
2737 cval = inb(info->base + UART_LCR);
2738
2739 outb(cval | UART_LCR_DLAB, info->base + UART_LCR); /* set DLAB */
2740
2741 outb(quot & 0xff, info->base + UART_DLL); /* LS of divisor */
2742 outb(quot >> 8, info->base + UART_DLM); /* MS of divisor */
2743 outb(cval, info->base + UART_LCR); /* reset DLAB */
2744
2745
2746 return ret;
2747 }
2748
2749 /*
2750 * ------------------------------------------------------------
2751 * friends of mxser_ioctl()
2752 * ------------------------------------------------------------
2753 */
2754 static int mxser_get_serial_info(struct mxser_struct *info, struct serial_struct __user *retinfo)
2755 {
2756 struct serial_struct tmp;
2757
2758 if (!retinfo)
2759 return -EFAULT;
2760 memset(&tmp, 0, sizeof(tmp));
2761 tmp.type = info->type;
2762 tmp.line = info->port;
2763 tmp.port = info->base;
2764 tmp.irq = info->irq;
2765 tmp.flags = info->flags;
2766 tmp.baud_base = info->baud_base;
2767 tmp.close_delay = info->close_delay;
2768 tmp.closing_wait = info->closing_wait;
2769 tmp.custom_divisor = info->custom_divisor;
2770 tmp.hub6 = 0;
2771 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2772 return -EFAULT;
2773 return 0;
2774 }
2775
2776 static int mxser_set_serial_info(struct mxser_struct *info, struct serial_struct __user *new_info)
2777 {
2778 struct serial_struct new_serial;
2779 unsigned int flags;
2780 int retval = 0;
2781
2782 if (!new_info || !info->base)
2783 return -EFAULT;
2784 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2785 return -EFAULT;
2786
2787 if ((new_serial.irq != info->irq) ||
2788 (new_serial.port != info->base) ||
2789 (new_serial.custom_divisor != info->custom_divisor) ||
2790 (new_serial.baud_base != info->baud_base))
2791 return -EPERM;
2792
2793 flags = info->flags & ASYNC_SPD_MASK;
2794
2795 if (!capable(CAP_SYS_ADMIN)) {
2796 if ((new_serial.baud_base != info->baud_base) ||
2797 (new_serial.close_delay != info->close_delay) ||
2798 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
2799 return -EPERM;
2800 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
2801 (new_serial.flags & ASYNC_USR_MASK));
2802 } else {
2803 /*
2804 * OK, past this point, all the error checking has been done.
2805 * At this point, we start making changes.....
2806 */
2807 info->flags = ((info->flags & ~ASYNC_FLAGS) |
2808 (new_serial.flags & ASYNC_FLAGS));
2809 info->close_delay = new_serial.close_delay * HZ / 100;
2810 info->closing_wait = new_serial.closing_wait * HZ / 100;
2811 info->tty->low_latency =
2812 (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2813 info->tty->low_latency = 0; /* (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0; */
2814 }
2815
2816 /* added by casper, 3/17/2000, for mouse */
2817 info->type = new_serial.type;
2818
2819 process_txrx_fifo(info);
2820
2821 if (info->flags & ASYNC_INITIALIZED) {
2822 if (flags != (info->flags & ASYNC_SPD_MASK)) {
2823 mxser_change_speed(info, NULL);
2824 }
2825 } else {
2826 retval = mxser_startup(info);
2827 }
2828 return retval;
2829 }
2830
2831 /*
2832 * mxser_get_lsr_info - get line status register info
2833 *
2834 * Purpose: Let user call ioctl() to get info when the UART physically
2835 * is emptied. On bus types like RS485, the transmitter must
2836 * release the bus after transmitting. This must be done when
2837 * the transmit shift register is empty, not be done when the
2838 * transmit holding register is empty. This functionality
2839 * allows an RS485 driver to be written in user space.
2840 */
2841 static int mxser_get_lsr_info(struct mxser_struct *info, unsigned int __user *value)
2842 {
2843 unsigned char status;
2844 unsigned int result;
2845 unsigned long flags;
2846
2847 spin_lock_irqsave(&info->slock, flags);
2848 status = inb(info->base + UART_LSR);
2849 spin_unlock_irqrestore(&info->slock, flags);
2850 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
2851 return put_user(result, value);
2852 }
2853
2854 /*
2855 * This routine sends a break character out the serial port.
2856 */
2857 static void mxser_send_break(struct mxser_struct *info, int duration)
2858 {
2859 unsigned long flags;
2860
2861 if (!info->base)
2862 return;
2863 set_current_state(TASK_INTERRUPTIBLE);
2864 spin_lock_irqsave(&info->slock, flags);
2865 outb(inb(info->base + UART_LCR) | UART_LCR_SBC,
2866 info->base + UART_LCR);
2867 spin_unlock_irqrestore(&info->slock, flags);
2868 schedule_timeout(duration);
2869 spin_lock_irqsave(&info->slock, flags);
2870 outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC,
2871 info->base + UART_LCR);
2872 spin_unlock_irqrestore(&info->slock, flags);
2873 }
2874
2875 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
2876 {
2877 struct mxser_struct *info = tty->driver_data;
2878 unsigned char control, status;
2879 unsigned long flags;
2880
2881
2882 if (tty->index == MXSER_PORTS)
2883 return -ENOIOCTLCMD;
2884 if (tty->flags & (1 << TTY_IO_ERROR))
2885 return -EIO;
2886
2887 control = info->MCR;
2888
2889 spin_lock_irqsave(&info->slock, flags);
2890 status = inb(info->base + UART_MSR);
2891 if (status & UART_MSR_ANY_DELTA)
2892 mxser_check_modem_status(info, status);
2893 spin_unlock_irqrestore(&info->slock, flags);
2894 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
2895 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
2896 ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
2897 ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
2898 ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
2899 ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
2900 }
2901
2902 static int mxser_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear)
2903 {
2904 struct mxser_struct *info = tty->driver_data;
2905 unsigned long flags;
2906
2907
2908 if (tty->index == MXSER_PORTS)
2909 return -ENOIOCTLCMD;
2910 if (tty->flags & (1 << TTY_IO_ERROR))
2911 return -EIO;
2912
2913 spin_lock_irqsave(&info->slock, flags);
2914
2915 if (set & TIOCM_RTS)
2916 info->MCR |= UART_MCR_RTS;
2917 if (set & TIOCM_DTR)
2918 info->MCR |= UART_MCR_DTR;
2919
2920 if (clear & TIOCM_RTS)
2921 info->MCR &= ~UART_MCR_RTS;
2922 if (clear & TIOCM_DTR)
2923 info->MCR &= ~UART_MCR_DTR;
2924
2925 outb(info->MCR, info->base + UART_MCR);
2926 spin_unlock_irqrestore(&info->slock, flags);
2927 return 0;
2928 }
2929
2930
2931 static int mxser_read_register(int, unsigned short *);
2932 static int mxser_program_mode(int);
2933 static void mxser_normal_mode(int);
2934
2935 static int mxser_get_ISA_conf(int cap, struct mxser_hwconf *hwconf)
2936 {
2937 int id, i, bits;
2938 unsigned short regs[16], irq;
2939 unsigned char scratch, scratch2;
2940
2941 hwconf->IsMoxaMustChipFlag = MOXA_OTHER_UART;
2942
2943 id = mxser_read_register(cap, regs);
2944 if (id == C168_ASIC_ID) {
2945 hwconf->board_type = MXSER_BOARD_C168_ISA;
2946 hwconf->ports = 8;
2947 } else if (id == C104_ASIC_ID) {
2948 hwconf->board_type = MXSER_BOARD_C104_ISA;
2949 hwconf->ports = 4;
2950 } else if (id == C102_ASIC_ID) {
2951 hwconf->board_type = MXSER_BOARD_C102_ISA;
2952 hwconf->ports = 2;
2953 } else if (id == CI132_ASIC_ID) {
2954 hwconf->board_type = MXSER_BOARD_CI132;
2955 hwconf->ports = 2;
2956 } else if (id == CI134_ASIC_ID) {
2957 hwconf->board_type = MXSER_BOARD_CI134;
2958 hwconf->ports = 4;
2959 } else if (id == CI104J_ASIC_ID) {
2960 hwconf->board_type = MXSER_BOARD_CI104J;
2961 hwconf->ports = 4;
2962 } else
2963 return 0;
2964
2965 irq = 0;
2966 if (hwconf->ports == 2) {
2967 irq = regs[9] & 0xF000;
2968 irq = irq | (irq >> 4);
2969 if (irq != (regs[9] & 0xFF00))
2970 return MXSER_ERR_IRQ_CONFLIT;
2971 } else if (hwconf->ports == 4) {
2972 irq = regs[9] & 0xF000;
2973 irq = irq | (irq >> 4);
2974 irq = irq | (irq >> 8);
2975 if (irq != regs[9])
2976 return MXSER_ERR_IRQ_CONFLIT;
2977 } else if (hwconf->ports == 8) {
2978 irq = regs[9] & 0xF000;
2979 irq = irq | (irq >> 4);
2980 irq = irq | (irq >> 8);
2981 if ((irq != regs[9]) || (irq != regs[10]))
2982 return MXSER_ERR_IRQ_CONFLIT;
2983 }
2984
2985 if (!irq)
2986 return MXSER_ERR_IRQ;
2987 hwconf->irq = ((int)(irq & 0xF000) >> 12);
2988 for (i = 0; i < 8; i++)
2989 hwconf->ioaddr[i] = (int) regs[i + 1] & 0xFFF8;
2990 if ((regs[12] & 0x80) == 0)
2991 return MXSER_ERR_VECTOR;
2992 hwconf->vector = (int)regs[11]; /* interrupt vector */
2993 if (id == 1)
2994 hwconf->vector_mask = 0x00FF;
2995 else
2996 hwconf->vector_mask = 0x000F;
2997 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
2998 if (regs[12] & bits) {
2999 hwconf->baud_base[i] = 921600;
3000 hwconf->MaxCanSetBaudRate[i] = 921600; /* add by Victor Yu. 09-04-2002 */
3001 } else {
3002 hwconf->baud_base[i] = 115200;
3003 hwconf->MaxCanSetBaudRate[i] = 115200; /* add by Victor Yu. 09-04-2002 */
3004 }
3005 }
3006 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
3007 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
3008 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
3009 outb(scratch2, cap + UART_LCR);
3010 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
3011 scratch = inb(cap + UART_IIR);
3012
3013 if (scratch & 0xC0)
3014 hwconf->uart_type = PORT_16550A;
3015 else
3016 hwconf->uart_type = PORT_16450;
3017 if (id == 1)
3018 hwconf->ports = 8;
3019 else
3020 hwconf->ports = 4;
3021 request_region(hwconf->ioaddr[0], 8 * hwconf->ports, "mxser(IO)");
3022 request_region(hwconf->vector, 1, "mxser(vector)");
3023 return hwconf->ports;
3024 }
3025
3026 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
3027 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
3028 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
3029 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
3030 #define EN_CCMD 0x000 /* Chip's command register */
3031 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
3032 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
3033 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
3034 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
3035 #define EN0_DCFG 0x00E /* Data configuration reg WR */
3036 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
3037 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
3038 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
3039 static int mxser_read_register(int port, unsigned short *regs)
3040 {
3041 int i, k, value, id;
3042 unsigned int j;
3043
3044 id = mxser_program_mode(port);
3045 if (id < 0)
3046 return id;
3047 for (i = 0; i < 14; i++) {
3048 k = (i & 0x3F) | 0x180;
3049 for (j = 0x100; j > 0; j >>= 1) {
3050 outb(CHIP_CS, port);
3051 if (k & j) {
3052 outb(CHIP_CS | CHIP_DO, port);
3053 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
3054 } else {
3055 outb(CHIP_CS, port);
3056 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
3057 }
3058 }
3059 (void)inb(port);
3060 value = 0;
3061 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
3062 outb(CHIP_CS, port);
3063 outb(CHIP_CS | CHIP_SK, port);
3064 if (inb(port) & CHIP_DI)
3065 value |= j;
3066 }
3067 regs[i] = value;
3068 outb(0, port);
3069 }
3070 mxser_normal_mode(port);
3071 return id;
3072 }
3073
3074 static int mxser_program_mode(int port)
3075 {
3076 int id, i, j, n;
3077 /* unsigned long flags; */
3078
3079 spin_lock(&gm_lock);
3080 outb(0, port);
3081 outb(0, port);
3082 outb(0, port);
3083 (void)inb(port);
3084 (void)inb(port);
3085 outb(0, port);
3086 (void)inb(port);
3087 /* restore_flags(flags); */
3088 spin_unlock(&gm_lock);
3089
3090 id = inb(port + 1) & 0x1F;
3091 if ((id != C168_ASIC_ID) &&
3092 (id != C104_ASIC_ID) &&
3093 (id != C102_ASIC_ID) &&
3094 (id != CI132_ASIC_ID) &&
3095 (id != CI134_ASIC_ID) &&
3096 (id != CI104J_ASIC_ID))
3097 return -1;
3098 for (i = 0, j = 0; i < 4; i++) {
3099 n = inb(port + 2);
3100 if (n == 'M') {
3101 j = 1;
3102 } else if ((j == 1) && (n == 1)) {
3103 j = 2;
3104 break;
3105 } else
3106 j = 0;
3107 }
3108 if (j != 2)
3109 id = -2;
3110 return id;
3111 }
3112
3113 static void mxser_normal_mode(int port)
3114 {
3115 int i, n;
3116
3117 outb(0xA5, port + 1);
3118 outb(0x80, port + 3);
3119 outb(12, port + 0); /* 9600 bps */
3120 outb(0, port + 1);
3121 outb(0x03, port + 3); /* 8 data bits */
3122 outb(0x13, port + 4); /* loop back mode */
3123 for (i = 0; i < 16; i++) {
3124 n = inb(port + 5);
3125 if ((n & 0x61) == 0x60)
3126 break;
3127 if ((n & 1) == 1)
3128 (void)inb(port);
3129 }
3130 outb(0x00, port + 4);
3131 }
3132
3133 module_init(mxser_module_init);
3134 module_exit(mxser_module_exit);
Support for the Chinese Samsung S3C2440 based development boards