| blob | ddb2879058c820a682712a7f28561111500dc376 |
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 */
39 #include <linux/config.h>
40 #include <linux/module.h>
41 #include <linux/version.h>
42 #include <linux/autoconf.h>
43 #include <linux/errno.h>
44 #include <linux/signal.h>
45 #include <linux/sched.h>
46 #include <linux/timer.h>
47 #include <linux/interrupt.h>
48 #include <linux/tty.h>
49 #include <linux/tty_flip.h>
50 #include <linux/serial.h>
51 #include <linux/serial_reg.h>
52 #include <linux/major.h>
53 #include <linux/string.h>
54 #include <linux/fcntl.h>
55 #include <linux/ptrace.h>
56 #include <linux/gfp.h>
57 #include <linux/ioport.h>
58 #include <linux/mm.h>
59 #include <linux/smp_lock.h>
60 #include <linux/delay.h>
61 #include <linux/pci.h>
63 #include <asm/system.h>
64 #include <asm/io.h>
65 #include <asm/irq.h>
66 #include <asm/segment.h>
67 #include <asm/bitops.h>
68 #include <asm/uaccess.h>
70 #include "mxser.h"
72 #define MXSER_VERSION "1.8"
73 #define MXSERMAJOR 174
74 #define MXSERCUMAJOR 175
76 #define MXSER_EVENT_TXLOW 1
77 #define MXSER_EVENT_HANGUP 2
79 #define MXSER_BOARDS 4 /* Max. boards */
80 #define MXSER_PORTS 32 /* Max. ports */
81 #define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
82 #define MXSER_ISR_PASS_LIMIT 256
84 #define MXSER_ERR_IOADDR -1
85 #define MXSER_ERR_IRQ -2
86 #define MXSER_ERR_IRQ_CONFLIT -3
87 #define MXSER_ERR_VECTOR -4
89 #define SERIAL_TYPE_NORMAL 1
90 #define SERIAL_TYPE_CALLOUT 2
92 #define WAKEUP_CHARS 256
94 #define UART_MCR_AFE 0x20
95 #define UART_LSR_SPECIAL 0x1E
97 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|IXON|IXOFF))
99 #define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? SA_SHIRQ : SA_INTERRUPT)
101 #define C168_ASIC_ID 1
102 #define C104_ASIC_ID 2
103 #define C102_ASIC_ID 0xB
104 #define CI132_ASIC_ID 4
105 #define CI134_ASIC_ID 3
106 #define CI104J_ASIC_ID 5
108 enum {
109 MXSER_BOARD_C168_ISA = 1,
110 MXSER_BOARD_C104_ISA,
111 MXSER_BOARD_CI104J,
112 MXSER_BOARD_C168_PCI,
113 MXSER_BOARD_C104_PCI,
114 MXSER_BOARD_C102_ISA,
115 MXSER_BOARD_CI132,
116 MXSER_BOARD_CI134,
117 MXSER_BOARD_CP132,
118 MXSER_BOARD_CP114,
119 MXSER_BOARD_CT114,
120 MXSER_BOARD_CP102,
121 MXSER_BOARD_CP104U,
122 MXSER_BOARD_CP168U,
123 MXSER_BOARD_CP132U,
124 MXSER_BOARD_CP134U,
125 MXSER_BOARD_CP104JU,
126 MXSER_BOARD_RC7000,
127 MXSER_BOARD_CP118U,
128 MXSER_BOARD_CP102UL,
129 MXSER_BOARD_CP102U,
130 MXSER_BOARD_CP102E,
131 };
133 static char *mxser_brdname[] = {
134 "C168 series",
135 "C104 series",
136 "CI-104J series",
137 "C168H/PCI series",
138 "C104H/PCI series",
139 "C102 series",
140 "CI-132 series",
141 "CI-134 series",
142 "CP-132 series",
143 "CP-114 series",
144 "CT-114 series",
145 "CP-102 series",
146 "CP-104U series",
147 "CP-168U series",
148 "CP-132U series",
149 "CP-134U series",
150 "CP-104JU series",
151 "Moxa UC7000 Serial",
152 "CP-118U series",
153 "CP-102UL series",
154 "CP-102U series",
155 "CP-102E series",
156 };
158 static int mxser_numports[] = {
159 8, // C168-ISA
160 4, // C104-ISA
161 4, // CI104J
162 8, // C168-PCI
163 4, // C104-PCI
164 2, // C102-ISA
165 2, // CI132
166 4, // CI134
167 2, // CP132
168 4, // CP114
169 4, // CT114
170 2, // CP102
171 4, // CP104U
172 8, // CP168U
173 2, // CP132U
174 4, // CP134U
175 4, // CP104JU
176 8, // RC7000
177 8, // CP118U
178 2, // CP102UL
179 2, // CP102U
180 2,
181 };
183 #define UART_TYPE_NUM 2
185 unsigned int Gmoxa_uart_id[UART_TYPE_NUM] = {
186 MOXA_MUST_MU150_HWID,
187 MOXA_MUST_MU860_HWID
188 };
190 // This is only for PCI
191 #define UART_INFO_NUM 3
192 struct mxpciuart_info {
193 int type;
194 int tx_fifo;
195 int rx_fifo;
196 int xmit_fifo_size;
197 int rx_high_water;
198 int rx_trigger;
199 int rx_low_water;
200 long max_baud;
201 };
203 struct mxpciuart_info Gpci_uart_info[UART_INFO_NUM] = {
204 {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
205 {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
206 {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
207 };
210 #ifdef CONFIG_PCI
212 static struct pci_device_id mxser_pcibrds[] = {
213 /*
214 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C168_PCI},
215 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C104_PCI},
216 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132},
217 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP114},
218 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CT114},
219 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102},
220 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104U},
221 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP168U},
222 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132U},
223 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP134U},
224 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104JU},
225 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_RC7000},
226 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP118U},
227 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102UL},
228 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102U},
229 */
230 {PCI_VENDOR_ID_MOXA, 0x1024, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102E},
231 {0}
232 };
234 MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
237 #endif
239 typedef struct _moxa_pci_info {
240 unsigned short busNum;
241 unsigned short devNum;
242 struct pci_dev *pdev; // add by Victor Yu. 06-23-2003
243 } moxa_pci_info;
245 static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
246 static int ttymajor = MXSERMAJOR;
247 static int calloutmajor = MXSERCUMAJOR;
248 static int verbose = 0;
250 /* Variables for insmod */
252 MODULE_AUTHOR("Casper Yang");
253 MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
254 MODULE_PARM(ioaddr, "1-4i");
255 MODULE_PARM(ttymajor, "i");
256 MODULE_PARM(calloutmajor, "i");
257 MODULE_PARM(verbose, "i");
258 MODULE_LICENSE("GPL");
260 struct mxser_log {
261 int tick;
262 unsigned long rxcnt[MXSER_PORTS];
263 unsigned long txcnt[MXSER_PORTS];
264 };
267 struct mxser_mon {
268 unsigned long rxcnt;
269 unsigned long txcnt;
270 unsigned long up_rxcnt;
271 unsigned long up_txcnt;
272 int modem_status;
273 unsigned char hold_reason;
274 };
276 struct mxser_mon_ext {
277 unsigned long rx_cnt[32];
278 unsigned long tx_cnt[32];
279 unsigned long up_rxcnt[32];
280 unsigned long up_txcnt[32];
281 int modem_status[32];
283 long baudrate[32];
284 int databits[32];
285 int stopbits[32];
286 int parity[32];
287 int flowctrl[32];
288 int fifo[32];
289 int iftype[32];
290 };
291 struct mxser_hwconf {
292 int board_type;
293 int ports;
294 int irq;
295 int vector;
296 int vector_mask;
297 int uart_type;
298 int ioaddr[MXSER_PORTS_PER_BOARD];
299 int baud_base[MXSER_PORTS_PER_BOARD];
300 moxa_pci_info pciInfo;
301 int IsMoxaMustChipFlag; // add by Victor Yu. 08-30-2002
302 int MaxCanSetBaudRate[MXSER_PORTS_PER_BOARD]; // add by Victor Yu. 09-04-2002
303 int opmode_ioaddr[MXSER_PORTS_PER_BOARD]; // add by Victor Yu. 01-05-2004
304 };
306 struct mxser_struct {
307 int port;
308 int base; /* port base address */
309 int irq; /* port using irq no. */
310 int vector; /* port irq vector */
311 int vectormask; /* port vector mask */
312 int rx_high_water;
313 int rx_trigger; /* Rx fifo trigger level */
314 int rx_low_water;
315 int baud_base; /* max. speed */
316 int flags; /* defined in tty.h */
317 int type; /* UART type */
318 struct tty_struct *tty;
319 int read_status_mask;
320 int ignore_status_mask;
321 int xmit_fifo_size;
322 int custom_divisor;
323 int x_char; /* xon/xoff character */
324 int close_delay;
325 unsigned short closing_wait;
326 int IER; /* Interrupt Enable Register */
327 int MCR; /* Modem control register */
328 unsigned long event;
329 int count; /* # of fd on device */
330 int blocked_open; /* # of blocked opens */
331 long session; /* Session of opening process */
332 long pgrp; /* pgrp of opening process */
333 unsigned char *xmit_buf;
334 int xmit_head;
335 int xmit_tail;
336 int xmit_cnt;
337 struct work_struct tqueue;
338 struct termios normal_termios;
339 struct termios callout_termios;
340 wait_queue_head_t open_wait;
341 wait_queue_head_t close_wait;
342 wait_queue_head_t delta_msr_wait;
343 struct async_icount icount; /* kernel counters for the 4 input interrupts */
344 int timeout;
345 int IsMoxaMustChipFlag; // add by Victor Yu. 08-30-2002
346 int MaxCanSetBaudRate; // add by Victor Yu. 09-04-2002
347 int opmode_ioaddr; // add by Victor Yu. 01-05-2004
348 unsigned char stop_rx;
349 unsigned char ldisc_stop_rx;
350 long realbaud;
351 struct mxser_mon mon_data;
352 unsigned char err_shadow;
353 spinlock_t slock;
354 };
357 struct mxser_mstatus {
358 tcflag_t cflag;
359 int cts;
360 int dsr;
361 int ri;
362 int dcd;
363 };
365 static struct mxser_mstatus GMStatus[MXSER_PORTS];
367 static int mxserBoardCAP[MXSER_BOARDS] = {
368 0, 0, 0, 0
369 /* 0x180, 0x280, 0x200, 0x320 */
370 };
372 static struct tty_driver *mxvar_sdriver;
373 static struct mxser_struct mxvar_table[MXSER_PORTS];
374 static struct tty_struct *mxvar_tty[MXSER_PORTS + 1];
375 static struct termios *mxvar_termios[MXSER_PORTS + 1];
376 static struct termios *mxvar_termios_locked[MXSER_PORTS + 1];
377 static struct mxser_log mxvar_log;
378 static int mxvar_diagflag;
379 static unsigned char mxser_msr[MXSER_PORTS + 1];
380 static struct mxser_mon_ext mon_data_ext;
381 static int mxser_set_baud_method[MXSER_PORTS + 1];
382 static spinlock_t gm_lock;
384 /*
385 * This is used to figure out the divisor speeds and the timeouts
386 */
388 static struct mxser_hwconf mxsercfg[MXSER_BOARDS];
390 /*
391 * static functions:
392 */
394 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf);
395 static int mxser_init(void);
397 //static void mxser_poll(unsigned long);
398 static int mxser_get_ISA_conf(int, struct mxser_hwconf *);
399 static int mxser_get_PCI_conf(int, int, int, struct mxser_hwconf *);
400 static void mxser_do_softint(void *);
401 static int mxser_open(struct tty_struct *, struct file *);
402 static void mxser_close(struct tty_struct *, struct file *);
403 static int mxser_write(struct tty_struct *, const unsigned char *, int);
404 static int mxser_write_room(struct tty_struct *);
405 static void mxser_flush_buffer(struct tty_struct *);
406 static int mxser_chars_in_buffer(struct tty_struct *);
407 static void mxser_flush_chars(struct tty_struct *);
408 static void mxser_put_char(struct tty_struct *, unsigned char);
409 static int mxser_ioctl(struct tty_struct *, struct file *, uint, ulong);
410 static int mxser_ioctl_special(unsigned int, unsigned long);
411 static void mxser_throttle(struct tty_struct *);
412 static void mxser_unthrottle(struct tty_struct *);
413 static void mxser_set_termios(struct tty_struct *, struct termios *);
414 static void mxser_stop(struct tty_struct *);
415 static void mxser_start(struct tty_struct *);
416 static void mxser_hangup(struct tty_struct *);
417 static void mxser_rs_break(struct tty_struct *, int);
418 static irqreturn_t mxser_interrupt(int, void *, struct pt_regs *);
419 static void mxser_receive_chars(struct mxser_struct *, int *);
420 static void mxser_transmit_chars(struct mxser_struct *);
421 static void mxser_check_modem_status(struct mxser_struct *, int);
422 static int mxser_block_til_ready(struct tty_struct *, struct file *, struct mxser_struct *);
423 static int mxser_startup(struct mxser_struct *);
424 static void mxser_shutdown(struct mxser_struct *);
425 static int mxser_change_speed(struct mxser_struct *, struct termios *old_termios);
426 static int mxser_get_serial_info(struct mxser_struct *, struct serial_struct *);
427 static int mxser_set_serial_info(struct mxser_struct *, struct serial_struct *);
428 static int mxser_get_lsr_info(struct mxser_struct *, unsigned int *);
429 static void mxser_send_break(struct mxser_struct *, int);
430 static int mxser_tiocmget(struct tty_struct *, struct file *);
431 static int mxser_tiocmset(struct tty_struct *, struct file *, unsigned int, unsigned int);
432 static int mxser_set_baud(struct mxser_struct *info, long newspd);
433 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout);
435 static void mxser_startrx(struct tty_struct *tty);
436 static void mxser_stoprx(struct tty_struct *tty);
439 static int CheckIsMoxaMust(int io)
440 {
441 u8 oldmcr, hwid;
442 int i;
444 outb(0, io + UART_LCR);
445 DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
446 oldmcr = inb(io + UART_MCR);
447 outb(0, io + UART_MCR);
448 SET_MOXA_MUST_XON1_VALUE(io, 0x11);
449 if ((hwid = inb(io + UART_MCR)) != 0) {
450 outb(oldmcr, io + UART_MCR);
451 return (MOXA_OTHER_UART);
452 }
454 GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
455 for (i = 0; i < UART_TYPE_NUM; i++) {
456 if (hwid == Gmoxa_uart_id[i])
457 return (int) hwid;
458 }
459 return MOXA_OTHER_UART;
460 }
462 // above is modified by Victor Yu. 08-15-2002
464 static struct tty_operations mxser_ops = {
465 .open = mxser_open,
466 .close = mxser_close,
467 .write = mxser_write,
468 .put_char = mxser_put_char,
469 .flush_chars = mxser_flush_chars,
470 .write_room = mxser_write_room,
471 .chars_in_buffer = mxser_chars_in_buffer,
472 .flush_buffer = mxser_flush_buffer,
473 .ioctl = mxser_ioctl,
474 .throttle = mxser_throttle,
475 .unthrottle = mxser_unthrottle,
476 .set_termios = mxser_set_termios,
477 .stop = mxser_stop,
478 .start = mxser_start,
479 .hangup = mxser_hangup,
480 .tiocmget = mxser_tiocmget,
481 .tiocmset = mxser_tiocmset,
482 };
484 /*
485 * The MOXA Smartio/Industio serial driver boot-time initialization code!
486 */
488 static int __init mxser_module_init(void)
489 {
490 int ret;
492 if (verbose)
493 printk(KERN_DEBUG "Loading module mxser ...\n");
494 ret = mxser_init();
495 if (verbose)
496 printk(KERN_DEBUG "Done.\n");
497 return ret;
498 }
500 static void __exit mxser_module_exit(void)
501 {
502 int i, err = 0;
504 if (verbose)
505 printk(KERN_DEBUG "Unloading module mxser ...\n");
507 if ((err |= tty_unregister_driver(mxvar_sdriver)))
508 printk(KERN_ERR "Couldn't unregister MOXA Smartio/Industio family serial driver\n");
510 for (i = 0; i < MXSER_BOARDS; i++) {
511 struct pci_dev *pdev;
513 if (mxsercfg[i].board_type == -1)
514 continue;
515 else {
516 pdev = mxsercfg[i].pciInfo.pdev;
517 free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
518 if (pdev != NULL) { //PCI
519 release_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2));
520 release_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3));
521 } else {
522 release_region(mxsercfg[i].ioaddr[0], 8 * mxsercfg[i].ports);
523 release_region(mxsercfg[i].vector, 1);
524 }
525 }
526 }
527 if (verbose)
528 printk(KERN_DEBUG "Done.\n");
530 }
532 static void process_txrx_fifo(struct mxser_struct *info)
533 {
534 int i;
536 if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
537 info->rx_trigger = 1;
538 info->rx_high_water = 1;
539 info->rx_low_water = 1;
540 info->xmit_fifo_size = 1;
541 } else {
542 for (i = 0; i < UART_INFO_NUM; i++) {
543 if (info->IsMoxaMustChipFlag == Gpci_uart_info[i].type) {
544 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
545 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
546 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
547 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
548 break;
549 }
550 }
551 }
552 }
554 static int mxser_initbrd(int board, struct mxser_hwconf *hwconf)
555 {
556 struct mxser_struct *info;
557 unsigned long flags;
558 int retval;
559 int i, n;
561 n = board * MXSER_PORTS_PER_BOARD;
562 info = &mxvar_table[n];
563 /*if (verbose) */ {
564 printk(KERN_DEBUG " ttyM%d - ttyM%d ", n, n + hwconf->ports - 1);
565 printk(KERN_DEBUG " max. baud rate = %d bps.\n", hwconf->MaxCanSetBaudRate[0]);
566 }
568 for (i = 0; i < hwconf->ports; i++, n++, info++) {
569 info->port = n;
570 info->base = hwconf->ioaddr[i];
571 info->irq = hwconf->irq;
572 info->vector = hwconf->vector;
573 info->vectormask = hwconf->vector_mask;
574 info->opmode_ioaddr = hwconf->opmode_ioaddr[i]; // add by Victor Yu. 01-05-2004
575 info->stop_rx = 0;
576 info->ldisc_stop_rx = 0;
578 info->IsMoxaMustChipFlag = hwconf->IsMoxaMustChipFlag;
579 //Enhance mode enabled here
580 if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
581 ENABLE_MOXA_MUST_ENCHANCE_MODE(info->base);
582 }
584 info->flags = ASYNC_SHARE_IRQ;
585 info->type = hwconf->uart_type;
586 info->baud_base = hwconf->baud_base[i];
588 info->MaxCanSetBaudRate = hwconf->MaxCanSetBaudRate[i];
590 process_txrx_fifo(info);
593 info->custom_divisor = hwconf->baud_base[i] * 16;
594 info->close_delay = 5 * HZ / 10;
595 info->closing_wait = 30 * HZ;
596 INIT_WORK(&info->tqueue, mxser_do_softint, info);
597 info->normal_termios = mxvar_sdriver->init_termios;
598 init_waitqueue_head(&info->open_wait);
599 init_waitqueue_head(&info->close_wait);
600 init_waitqueue_head(&info->delta_msr_wait);
601 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
602 info->err_shadow = 0;
603 spin_lock_init(&info->slock);
604 }
605 /*
606 * Allocate the IRQ if necessary
607 */
610 /* before set INT ISR, disable all int */
611 for (i = 0; i < hwconf->ports; i++) {
612 outb(inb(hwconf->ioaddr[i] + UART_IER) & 0xf0, hwconf->ioaddr[i] + UART_IER);
613 }
615 n = board * MXSER_PORTS_PER_BOARD;
616 info = &mxvar_table[n];
618 spin_lock_irqsave(&info->slock, flags);
619 retval = request_irq(hwconf->irq, mxser_interrupt, IRQ_T(info), "mxser", info);
620 if (retval) {
621 spin_unlock_irqrestore(&info->slock, flags);
622 printk(KERN_ERR "Board %d: %s", board, mxser_brdname[hwconf->board_type - 1]);
623 printk(" Request irq fail,IRQ (%d) may be conflit with another device.\n", info->irq);
624 return retval;
625 }
627 spin_unlock_irqrestore(&info->slock, flags);
630 return 0;
631 }
634 static void mxser_getcfg(int board, struct mxser_hwconf *hwconf)
635 {
636 mxsercfg[board] = *hwconf;
637 }
639 #ifdef CONFIG_PCI
640 static int mxser_get_PCI_conf(int busnum, int devnum, int board_type, struct mxser_hwconf *hwconf)
641 {
642 int i, j;
643 // unsigned int val;
644 unsigned int ioaddress;
645 struct pci_dev *pdev = hwconf->pciInfo.pdev;
647 //io address
648 hwconf->board_type = board_type;
649 hwconf->ports = mxser_numports[board_type - 1];
650 ioaddress = pci_resource_start(pdev, 2);
651 request_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2), "mxser(IO)");
653 for (i = 0; i < hwconf->ports; i++) {
654 hwconf->ioaddr[i] = ioaddress + 8 * i;
655 }
657 //vector
658 ioaddress = pci_resource_start(pdev, 3);
659 request_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3), "mxser(vector)");
660 hwconf->vector = ioaddress;
662 //irq
663 hwconf->irq = hwconf->pciInfo.pdev->irq;
665 hwconf->IsMoxaMustChipFlag = CheckIsMoxaMust(hwconf->ioaddr[0]);
666 hwconf->uart_type = PORT_16550A;
667 hwconf->vector_mask = 0;
670 for (i = 0; i < hwconf->ports; i++) {
671 for (j = 0; j < UART_INFO_NUM; j++) {
672 if (Gpci_uart_info[j].type == hwconf->IsMoxaMustChipFlag) {
673 hwconf->MaxCanSetBaudRate[i] = Gpci_uart_info[j].max_baud;
675 //exception....CP-102
676 if (board_type == MXSER_BOARD_CP102)
677 hwconf->MaxCanSetBaudRate[i] = 921600;
678 break;
679 }
680 }
681 }
683 if (hwconf->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID) {
684 for (i = 0; i < hwconf->ports; i++) {
685 if (i < 4)
686 hwconf->opmode_ioaddr[i] = ioaddress + 4;
687 else
688 hwconf->opmode_ioaddr[i] = ioaddress + 0x0c;
689 }
690 outb(0, ioaddress + 4); // default set to RS232 mode
691 outb(0, ioaddress + 0x0c); //default set to RS232 mode
692 }
694 for (i = 0; i < hwconf->ports; i++) {
695 hwconf->vector_mask |= (1 << i);
696 hwconf->baud_base[i] = 921600;
697 }
698 return (0);
699 }
700 #endif
702 static int mxser_init(void)
703 {
704 int i, m, retval, b, n;
705 int ret1;
706 struct pci_dev *pdev = NULL;
707 int index;
708 unsigned char busnum, devnum;
709 struct mxser_hwconf hwconf;
711 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
712 if (!mxvar_sdriver)
713 return -ENOMEM;
714 spin_lock_init(&gm_lock);
716 for (i = 0; i < MXSER_BOARDS; i++) {
717 mxsercfg[i].board_type = -1;
718 }
720 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n", MXSER_VERSION);
722 /* Initialize the tty_driver structure */
723 memset(mxvar_sdriver, 0, sizeof(struct tty_driver));
724 mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
725 mxvar_sdriver->name = "ttyM";
726 mxvar_sdriver->major = ttymajor;
727 mxvar_sdriver->minor_start = 0;
728 mxvar_sdriver->num = MXSER_PORTS + 1;
729 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
730 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
731 mxvar_sdriver->init_termios = tty_std_termios;
732 mxvar_sdriver->init_termios.c_cflag = B9600 | CS8 | CREAD | HUPCL | CLOCAL;
733 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW;
734 tty_set_operations(mxvar_sdriver, &mxser_ops);
735 mxvar_sdriver->ttys = mxvar_tty;
736 mxvar_sdriver->termios = mxvar_termios;
737 mxvar_sdriver->termios_locked = mxvar_termios_locked;
739 mxvar_sdriver->open = mxser_open;
740 mxvar_sdriver->close = mxser_close;
741 mxvar_sdriver->write = mxser_write;
742 mxvar_sdriver->put_char = mxser_put_char;
743 mxvar_sdriver->flush_chars = mxser_flush_chars;
744 mxvar_sdriver->write_room = mxser_write_room;
745 mxvar_sdriver->chars_in_buffer = mxser_chars_in_buffer;
746 mxvar_sdriver->flush_buffer = mxser_flush_buffer;
747 mxvar_sdriver->ioctl = mxser_ioctl;
748 mxvar_sdriver->throttle = mxser_throttle;
749 mxvar_sdriver->unthrottle = mxser_unthrottle;
750 mxvar_sdriver->set_termios = mxser_set_termios;
751 mxvar_sdriver->stop = mxser_stop;
752 mxvar_sdriver->start = mxser_start;
753 mxvar_sdriver->hangup = mxser_hangup;
754 mxvar_sdriver->break_ctl = mxser_rs_break;
755 mxvar_sdriver->wait_until_sent = mxser_wait_until_sent;
757 mxvar_diagflag = 0;
758 memset(mxvar_table, 0, MXSER_PORTS * sizeof(struct mxser_struct));
759 memset(&mxvar_log, 0, sizeof(struct mxser_log));
761 memset(&mxser_msr, 0, sizeof(unsigned char) * (MXSER_PORTS + 1));
762 memset(&mon_data_ext, 0, sizeof(struct mxser_mon_ext));
763 memset(&mxser_set_baud_method, 0, sizeof(int) * (MXSER_PORTS + 1));
764 memset(&hwconf, 0, sizeof(struct mxser_hwconf));
766 m = 0;
767 /* Start finding ISA boards here */
768 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
769 int cap;
770 if (!(cap = mxserBoardCAP[b]))
771 continue;
773 retval = mxser_get_ISA_conf(cap, &hwconf);
775 if (retval != 0)
776 printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n", mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
778 if (retval <= 0) {
779 if (retval == MXSER_ERR_IRQ)
780 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
781 else if (retval == MXSER_ERR_IRQ_CONFLIT)
782 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
783 else if (retval == MXSER_ERR_VECTOR)
784 printk(KERN_ERR "Invalid interrupt vector,board not configured\n");
785 else if (retval == MXSER_ERR_IOADDR)
786 printk(KERN_ERR "Invalid I/O address,board not configured\n");
788 continue;
789 }
791 hwconf.pciInfo.busNum = 0;
792 hwconf.pciInfo.devNum = 0;
793 hwconf.pciInfo.pdev = NULL;
795 mxser_getcfg(m, &hwconf);
796 //init mxsercfg first, or mxsercfg data is not correct on ISR.
797 //mxser_initbrd will hook ISR.
798 if (mxser_initbrd(m, &hwconf) < 0)
799 continue;
802 m++;
803 }
805 /* Start finding ISA boards from module arg */
806 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
807 int cap;
808 if (!(cap = ioaddr[b]))
809 continue;
811 retval = mxser_get_ISA_conf(cap, &hwconf);
813 if (retval != 0)
814 printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n", mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
816 if (retval <= 0) {
817 if (retval == MXSER_ERR_IRQ)
818 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
819 else if (retval == MXSER_ERR_IRQ_CONFLIT)
820 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
821 else if (retval == MXSER_ERR_VECTOR)
822 printk(KERN_ERR "Invalid interrupt vector,board not configured\n");
823 else if (retval == MXSER_ERR_IOADDR)
824 printk(KERN_ERR "Invalid I/O address,board not configured\n");
826 continue;
827 }
829 hwconf.pciInfo.busNum = 0;
830 hwconf.pciInfo.devNum = 0;
831 hwconf.pciInfo.pdev = NULL;
833 mxser_getcfg(m, &hwconf);
834 //init mxsercfg first, or mxsercfg data is not correct on ISR.
835 //mxser_initbrd will hook ISR.
836 if (mxser_initbrd(m, &hwconf) < 0)
837 continue;
839 m++;
840 }
842 /* start finding PCI board here */
843 n = (sizeof(mxser_pcibrds) / sizeof(mxser_pcibrds[0])) - 1;
844 index = 0;
845 b = 0;
846 while (b < n) {
847 pdev = pci_find_device(mxser_pcibrds[b].vendor, mxser_pcibrds[b].device, pdev);
848 if (pdev == NULL) {
849 b++;
850 continue;
851 }
852 hwconf.pciInfo.busNum = busnum = pdev->bus->number;
853 hwconf.pciInfo.devNum = devnum = PCI_SLOT(pdev->devfn) << 3;
854 hwconf.pciInfo.pdev = pdev;
855 printk(KERN_INFO "Found MOXA %s board(BusNo=%d,DevNo=%d)\n", mxser_brdname[(int) (mxser_pcibrds[b].driver_data) - 1], busnum, devnum >> 3);
856 index++;
857 if (m >= MXSER_BOARDS) {
858 printk(KERN_ERR "Too many Smartio/Industio family boards find (maximum %d),board not configured\n", MXSER_BOARDS);
859 } else {
860 if (pci_enable_device(pdev)) {
861 printk(KERN_ERR "Moxa SmartI/O PCI enable fail !\n");
862 continue;
863 }
864 retval = mxser_get_PCI_conf(busnum, devnum, (int) mxser_pcibrds[b].driver_data, &hwconf);
865 if (retval < 0) {
866 if (retval == MXSER_ERR_IRQ)
867 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
868 else if (retval == MXSER_ERR_IRQ_CONFLIT)
869 printk(KERN_ERR "Invalid interrupt number,board not configured\n");
870 else if (retval == MXSER_ERR_VECTOR)
871 printk(KERN_ERR "Invalid interrupt vector,board not configured\n");
872 else if (retval == MXSER_ERR_IOADDR)
873 printk(KERN_ERR "Invalid I/O address,board not configured\n");
874 continue;
875 }
876 mxser_getcfg(m, &hwconf);
877 //init mxsercfg first, or mxsercfg data is not correct on ISR.
878 //mxser_initbrd will hook ISR.
879 if (mxser_initbrd(m, &hwconf) < 0)
880 continue;
881 m++;
882 }
883 }
885 ret1 = 0;
886 if (!(ret1 = tty_register_driver(mxvar_sdriver))) {
887 return 0;
888 } else
889 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family driver !\n");
892 if (ret1) {
893 for (i = 0; i < MXSER_BOARDS; i++) {
894 if (mxsercfg[i].board_type == -1)
895 continue;
896 else {
897 free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
898 //todo: release io, vector
899 }
900 }
901 return -1;
902 }
904 return (0);
905 }
907 static void mxser_do_softint(void *private_)
908 {
909 struct mxser_struct *info = (struct mxser_struct *) private_;
910 struct tty_struct *tty;
912 tty = info->tty;
914 if (tty) {
915 if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
916 tty_wakeup(tty);
917 if (test_and_clear_bit(MXSER_EVENT_HANGUP, &info->event))
918 tty_hangup(tty);
919 }
920 }
922 static unsigned char mxser_get_msr(int baseaddr, int mode, int port, struct mxser_struct *info)
923 {
924 unsigned char status = 0;
926 status = inb(baseaddr + UART_MSR);
928 mxser_msr[port] &= 0x0F;
929 mxser_msr[port] |= status;
930 status = mxser_msr[port];
931 if (mode)
932 mxser_msr[port] = 0;
934 return status;
935 }
937 /*
938 * This routine is called whenever a serial port is opened. It
939 * enables interrupts for a serial port, linking in its async structure into
940 * the IRQ chain. It also performs the serial-specific
941 * initialization for the tty structure.
942 */
943 static int mxser_open(struct tty_struct *tty, struct file *filp)
944 {
945 struct mxser_struct *info;
946 int retval, line;
948 line = tty->index;
949 if (line == MXSER_PORTS)
950 return 0;
951 if (line < 0 || line > MXSER_PORTS)
952 return -ENODEV;
953 info = mxvar_table + line;
954 if (!info->base)
955 return (-ENODEV);
957 tty->driver_data = info;
958 info->tty = tty;
959 /*
960 * Start up serial port
961 */
962 retval = mxser_startup(info);
963 if (retval)
964 return (retval);
966 retval = mxser_block_til_ready(tty, filp, info);
967 if (retval)
968 return (retval);
970 info->count++;
972 if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
973 if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
974 *tty->termios = info->normal_termios;
975 else
976 *tty->termios = info->callout_termios;
977 mxser_change_speed(info, 0);
978 }
980 info->session = current->signal->session;
981 info->pgrp = process_group(current);
982 clear_bit(TTY_DONT_FLIP, &tty->flags);
984 //status = mxser_get_msr(info->base, 0, info->port);
985 //mxser_check_modem_status(info, status);
987 /* unmark here for very high baud rate (ex. 921600 bps) used
988 */
989 tty->low_latency = 1;
990 return 0;
991 }
993 /*
994 * This routine is called when the serial port gets closed. First, we
995 * wait for the last remaining data to be sent. Then, we unlink its
996 * async structure from the interrupt chain if necessary, and we free
997 * that IRQ if nothing is left in the chain.
998 */
999 static void mxser_close(struct tty_struct *tty, struct file *filp)
1000 {
1001 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1003 unsigned long timeout;
1004 unsigned long flags;
1005 struct tty_ldisc *ld;
1007 if (tty->index == MXSER_PORTS)
1008 return;
1009 if (!info)
1010 BUG();
1012 spin_lock_irqsave(&info->slock, flags);
1014 if (tty_hung_up_p(filp)) {
1015 spin_unlock_irqrestore(&info->slock, flags);
1016 return;
1017 }
1018 if ((tty->count == 1) && (info->count != 1)) {
1019 /*
1020 * Uh, oh. tty->count is 1, which means that the tty
1021 * structure will be freed. Info->count should always
1022 * be one in these conditions. If it's greater than
1023 * one, we've got real problems, since it means the
1024 * serial port won't be shutdown.
1025 */
1026 printk(KERN_ERR "mxser_close: bad serial port count; tty->count is 1, " "info->count is %d\n", info->count);
1027 info->count = 1;
1028 }
1029 if (--info->count < 0) {
1030 printk(KERN_ERR "mxser_close: bad serial port count for ttys%d: %d\n", info->port, info->count);
1031 info->count = 0;
1032 }
1033 if (info->count) {
1034 spin_unlock_irqrestore(&info->slock, flags);
1035 return;
1036 }
1037 info->flags |= ASYNC_CLOSING;
1038 spin_unlock_irqrestore(&info->slock, flags);
1039 /*
1040 * Save the termios structure, since this port may have
1041 * separate termios for callout and dialin.
1042 */
1043 if (info->flags & ASYNC_NORMAL_ACTIVE)
1044 info->normal_termios = *tty->termios;
1045 /*
1046 * Now we wait for the transmit buffer to clear; and we notify
1047 * the line discipline to only process XON/XOFF characters.
1048 */
1049 tty->closing = 1;
1050 if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1051 tty_wait_until_sent(tty, info->closing_wait);
1052 /*
1053 * At this point we stop accepting input. To do this, we
1054 * disable the receive line status interrupts, and tell the
1055 * interrupt driver to stop checking the data ready bit in the
1056 * line status register.
1057 */
1058 info->IER &= ~UART_IER_RLSI;
1059 if (info->IsMoxaMustChipFlag)
1060 info->IER &= ~MOXA_MUST_RECV_ISR;
1061 /* by William
1062 info->read_status_mask &= ~UART_LSR_DR;
1063 */
1064 if (info->flags & ASYNC_INITIALIZED) {
1065 outb(info->IER, info->base + UART_IER);
1066 /*
1067 * Before we drop DTR, make sure the UART transmitter
1068 * has completely drained; this is especially
1069 * important if there is a transmit FIFO!
1070 */
1071 timeout = jiffies + HZ;
1072 while (!(inb(info->base + UART_LSR) & UART_LSR_TEMT)) {
1073 set_current_state(TASK_INTERRUPTIBLE);
1074 schedule_timeout(5);
1075 if (time_after(jiffies, timeout))
1076 break;
1077 }
1078 }
1079 mxser_shutdown(info);
1081 if (tty->driver->flush_buffer)
1082 tty->driver->flush_buffer(tty);
1084 ld = tty_ldisc_ref(tty);
1085 if (ld) {
1086 if(ld->flush_buffer)
1087 ld->flush_buffer(tty);
1088 tty_ldisc_deref(ld);
1089 }
1091 tty->closing = 0;
1092 info->event = 0;
1093 info->tty = 0;
1094 if (info->blocked_open) {
1095 if (info->close_delay) {
1096 set_current_state(TASK_INTERRUPTIBLE);
1097 schedule_timeout(info->close_delay);
1098 }
1099 wake_up_interruptible(&info->open_wait);
1100 }
1102 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1103 wake_up_interruptible(&info->close_wait);
1105 }
1107 static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1108 {
1109 int c, total = 0;
1110 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1111 unsigned long flags;
1113 if (!tty || !info->xmit_buf)
1114 return (0);
1116 while (1) {
1117 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1, SERIAL_XMIT_SIZE - info->xmit_head));
1118 if (c <= 0)
1119 break;
1121 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1122 spin_lock_irqsave(&info->slock, flags);
1123 info->xmit_head = (info->xmit_head + c) & (SERIAL_XMIT_SIZE - 1);
1124 info->xmit_cnt += c;
1125 spin_unlock_irqrestore(&info->slock, flags);
1127 buf += c;
1128 count -= c;
1129 total += c;
1131 }
1133 if (info->xmit_cnt && !tty->stopped && !(info->IER & UART_IER_THRI)) {
1134 if (!tty->hw_stopped || (info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
1135 spin_lock_irqsave(&info->slock, flags);
1136 info->IER |= UART_IER_THRI;
1137 outb(info->IER, info->base + UART_IER);
1138 spin_unlock_irqrestore(&info->slock, flags);
1139 }
1140 }
1141 return total;
1142 }
1144 static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1145 {
1146 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1147 unsigned long flags;
1149 if (!tty || !info->xmit_buf)
1150 return;
1152 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1153 return;
1155 spin_lock_irqsave(&info->slock, flags);
1156 info->xmit_buf[info->xmit_head++] = ch;
1157 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1158 info->xmit_cnt++;
1159 spin_unlock_irqrestore(&info->slock, flags);
1160 if (!tty->stopped && !(info->IER & UART_IER_THRI)) {
1161 if (!tty->hw_stopped || (info->type == PORT_16550A) || info->IsMoxaMustChipFlag) {
1162 spin_lock_irqsave(&info->slock, flags);
1163 info->IER |= UART_IER_THRI;
1164 outb(info->IER, info->base + UART_IER);
1165 spin_unlock_irqrestore(&info->slock, flags);
1166 }
1167 }
1168 }
1171 static void mxser_flush_chars(struct tty_struct *tty)
1172 {
1173 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1174 unsigned long flags;
1176 if (info->xmit_cnt <= 0 || tty->stopped || !info->xmit_buf || (tty->hw_stopped && (info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)))
1177 return;
1179 spin_lock_irqsave(&info->slock, flags);
1181 info->IER |= UART_IER_THRI;
1182 outb(info->IER, info->base + UART_IER);
1184 spin_unlock_irqrestore(&info->slock, flags);
1185 }
1187 static int mxser_write_room(struct tty_struct *tty)
1188 {
1189 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1190 int ret;
1192 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1193 if (ret < 0)
1194 ret = 0;
1195 return (ret);
1196 }
1198 static int mxser_chars_in_buffer(struct tty_struct *tty)
1199 {
1200 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1201 return info->xmit_cnt;
1202 }
1204 static void mxser_flush_buffer(struct tty_struct *tty)
1205 {
1206 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1207 char fcr;
1208 unsigned long flags;
1211 spin_lock_irqsave(&info->slock, flags);
1212 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1214 /* below added by shinhay */
1215 fcr = inb(info->base + UART_FCR);
1216 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
1217 outb(fcr, info->base + UART_FCR);
1219 spin_unlock_irqrestore(&info->slock, flags);
1220 /* above added by shinhay */
1222 wake_up_interruptible(&tty->write_wait);
1223 if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
1224 (tty->ldisc.write_wakeup) (tty);
1225 }
1227 static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1228 {
1229 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1230 int retval;
1231 struct async_icount cprev, cnow; /* kernel counter temps */
1232 struct serial_icounter_struct *p_cuser; /* user space */
1233 unsigned long templ;
1234 unsigned long flags;
1236 if (tty->index == MXSER_PORTS)
1237 return (mxser_ioctl_special(cmd, arg));
1239 // following add by Victor Yu. 01-05-2004
1240 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1241 int opmode, p;
1242 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1243 int shiftbit;
1244 unsigned char val, mask;
1246 p = info->port % 4;
1247 if (cmd == MOXA_SET_OP_MODE) {
1248 if (get_user(opmode, (int *) arg))
1249 return -EFAULT;
1250 if (opmode != RS232_MODE && opmode != RS485_2WIRE_MODE && opmode != RS422_MODE && opmode != RS485_4WIRE_MODE)
1251 return -EFAULT;
1252 mask = ModeMask[p];
1253 shiftbit = p * 2;
1254 val = inb(info->opmode_ioaddr);
1255 val &= mask;
1256 val |= (opmode << shiftbit);
1257 outb(val, info->opmode_ioaddr);
1258 } else {
1259 shiftbit = p * 2;
1260 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1261 opmode &= OP_MODE_MASK;
1262 if (copy_to_user((int *) arg, &opmode, sizeof(int)))
1263 return -EFAULT;
1264 }
1265 return 0;
1266 }
1267 // above add by Victor Yu. 01-05-2004
1269 if ((cmd != TIOCGSERIAL) && (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1270 if (tty->flags & (1 << TTY_IO_ERROR))
1271 return (-EIO);
1272 }
1273 switch (cmd) {
1274 case TCSBRK: /* SVID version: non-zero arg --> no break */
1275 retval = tty_check_change(tty);
1276 if (retval)
1277 return (retval);
1278 tty_wait_until_sent(tty, 0);
1279 if (!arg)
1280 mxser_send_break(info, HZ / 4); /* 1/4 second */
1281 return (0);
1282 case TCSBRKP: /* support for POSIX tcsendbreak() */
1283 retval = tty_check_change(tty);
1284 if (retval)
1285 return (retval);
1286 tty_wait_until_sent(tty, 0);
1287 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1288 return (0);
1289 case TIOCGSOFTCAR:
1290 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long *) arg);
1291 case TIOCSSOFTCAR:
1292 if (get_user(templ, (unsigned long *) arg))
1293 return -EFAULT;
1294 arg = templ;
1295 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1296 return (0);
1297 case TIOCGSERIAL:
1298 return (mxser_get_serial_info(info, (struct serial_struct *) arg));
1299 case TIOCSSERIAL:
1300 return (mxser_set_serial_info(info, (struct serial_struct *) arg));
1301 case TIOCSERGETLSR: /* Get line status register */
1302 return (mxser_get_lsr_info(info, (unsigned int *) arg));
1303 /*
1304 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1305 * - mask passed in arg for lines of interest
1306 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1307 * Caller should use TIOCGICOUNT to see which one it was
1308 */
1309 case TIOCMIWAIT:{
1310 DECLARE_WAITQUEUE(wait, current);
1311 int ret;
1312 spin_lock_irqsave(&info->slock, flags);
1313 cprev = info->icount; /* note the counters on entry */
1314 spin_unlock_irqrestore(&info->slock, flags);
1316 add_wait_queue(&info->delta_msr_wait, &wait);
1317 while (1) {
1318 spin_lock_irqsave(&info->slock, flags);
1319 cnow = info->icount; /* atomic copy */
1320 spin_unlock_irqrestore(&info->slock, flags);
1322 set_current_state(TASK_INTERRUPTIBLE);
1323 if (((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) || ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) || ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) || ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts))) {
1324 ret = 0;
1325 break;
1326 }
1327 /* see if a signal did it */
1328 if (signal_pending(current)) {
1329 ret = -ERESTARTSYS;
1330 break;
1331 }
1332 cprev = cnow;
1333 }
1334 current->state = TASK_RUNNING;
1335 remove_wait_queue(&info->delta_msr_wait, &wait);
1336 break;
1337 }
1338 /* NOTREACHED */
1339 /*
1340 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1341 * Return: write counters to the user passed counter struct
1342 * NB: both 1->0 and 0->1 transitions are counted except for
1343 * RI where only 0->1 is counted.
1344 */
1345 case TIOCGICOUNT:
1346 spin_lock_irqsave(&info->slock, flags);
1347 cnow = info->icount;
1348 spin_unlock_irqrestore(&info->slock, flags);
1349 p_cuser = (struct serial_icounter_struct *) arg;
1350 /* modified by casper 1/11/2000 */
1351 if (put_user(cnow.frame, &p_cuser->frame))
1352 return -EFAULT;
1353 if (put_user(cnow.brk, &p_cuser->brk))
1354 return -EFAULT;
1355 if (put_user(cnow.overrun, &p_cuser->overrun))
1356 return -EFAULT;
1357 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1358 return -EFAULT;
1359 if (put_user(cnow.parity, &p_cuser->parity))
1360 return -EFAULT;
1361 if (put_user(cnow.rx, &p_cuser->rx))
1362 return -EFAULT;
1363 if (put_user(cnow.tx, &p_cuser->tx))
1364 return -EFAULT;
1365 put_user(cnow.cts, &p_cuser->cts);
1366 put_user(cnow.dsr, &p_cuser->dsr);
1367 put_user(cnow.rng, &p_cuser->rng);
1368 put_user(cnow.dcd, &p_cuser->dcd);
1370 /* */
1371 return 0;
1372 case MOXA_HighSpeedOn:
1373 return put_user(info->baud_base != 115200 ? 1 : 0, (int *) arg);
1375 case MOXA_SDS_RSTICOUNTER:{
1376 info->mon_data.rxcnt = 0;
1377 info->mon_data.txcnt = 0;
1378 return 0;
1379 }
1380 // (above) added by James.
1381 case MOXA_ASPP_SETBAUD:{
1382 long baud;
1383 if (get_user(baud, (long *) arg))
1384 return -EFAULT;
1385 mxser_set_baud(info, baud);
1386 return 0;
1387 }
1388 case MOXA_ASPP_GETBAUD:
1389 if (copy_to_user((long *) arg, &info->realbaud, sizeof(long)))
1390 return -EFAULT;
1392 return 0;
1394 case MOXA_ASPP_OQUEUE:{
1395 int len, lsr;
1397 len = mxser_chars_in_buffer(tty);
1399 lsr = inb(info->base + UART_LSR) & UART_LSR_TEMT;
1401 len += (lsr ? 0 : 1);
1403 if (copy_to_user((int *) arg, &len, sizeof(int)))
1404 return -EFAULT;
1406 return 0;
1407 }
1408 case MOXA_ASPP_MON:{
1409 int mcr, status;
1410 // info->mon_data.ser_param = tty->termios->c_cflag;
1412 status = mxser_get_msr(info->base, 1, info->port, info);
1413 mxser_check_modem_status(info, status);
1415 mcr = inb(info->base + UART_MCR);
1416 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1417 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1418 else
1419 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1421 if (mcr & MOXA_MUST_MCR_TX_XON)
1422 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1423 else
1424 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1426 if (info->tty->hw_stopped)
1427 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1428 else
1429 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1432 if (copy_to_user((struct mxser_mon *) arg, &(info->mon_data), sizeof(struct mxser_mon)))
1433 return -EFAULT;
1435 return 0;
1437 }
1439 case MOXA_ASPP_LSTATUS:{
1440 if (copy_to_user((struct mxser_mon *) arg, &(info->err_shadow), sizeof(unsigned char)))
1441 return -EFAULT;
1443 info->err_shadow = 0;
1444 return 0;
1446 }
1447 case MOXA_SET_BAUD_METHOD:{
1448 int method;
1449 if (get_user(method, (int *) arg))
1450 return -EFAULT;
1451 mxser_set_baud_method[info->port] = method;
1452 if (copy_to_user((int *) arg, &method, sizeof(int)))
1453 return -EFAULT;
1455 return 0;
1456 }
1457 default:
1458 return -ENOIOCTLCMD;
1459 }
1460 return 0;
1461 }
1463 static int mxser_ioctl_special(unsigned int cmd, unsigned long arg)
1464 {
1465 int i, result, status;
1467 switch (cmd) {
1468 case MOXA_GET_CONF:
1469 if (copy_to_user((struct mxser_hwconf *) arg, mxsercfg, sizeof(struct mxser_hwconf) * 4))
1470 return -EFAULT;
1471 return 0;
1472 case MOXA_GET_MAJOR:
1473 if (copy_to_user((int *) arg, &ttymajor, sizeof(int)))
1474 return -EFAULT;
1475 return 0;
1477 case MOXA_GET_CUMAJOR:
1478 if (copy_to_user((int *) arg, &calloutmajor, sizeof(int)))
1479 return -EFAULT;
1480 return 0;
1482 case MOXA_CHKPORTENABLE:
1483 result = 0;
1484 for (i = 0; i < MXSER_PORTS; i++) {
1485 if (mxvar_table[i].base)
1486 result |= (1 << i);
1487 }
1488 return put_user(result, (unsigned long *) arg);
1489 case MOXA_GETDATACOUNT:
1490 if (copy_to_user((struct mxser_log *) arg, &mxvar_log, sizeof(mxvar_log)))
1491 return -EFAULT;
1492 return (0);
1493 case MOXA_GETMSTATUS:
1494 for (i = 0; i < MXSER_PORTS; i++) {
1495 GMStatus[i].ri = 0;
1496 if (!mxvar_table[i].base) {
1497 GMStatus[i].dcd = 0;
1498 GMStatus[i].dsr = 0;
1499 GMStatus[i].cts = 0;
1500 continue;
1501 }
1503 if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios)
1504 GMStatus[i].cflag = mxvar_table[i].normal_termios.c_cflag;
1505 else
1506 GMStatus[i].cflag = mxvar_table[i].tty->termios->c_cflag;
1508 status = inb(mxvar_table[i].base + UART_MSR);
1509 if (status & 0x80 /*UART_MSR_DCD */ )
1510 GMStatus[i].dcd = 1;
1511 else
1512 GMStatus[i].dcd = 0;
1514 if (status & 0x20 /*UART_MSR_DSR */ )
1515 GMStatus[i].dsr = 1;
1516 else
1517 GMStatus[i].dsr = 0;
1520 if (status & 0x10 /*UART_MSR_CTS */ )
1521 GMStatus[i].cts = 1;
1522 else
1523 GMStatus[i].cts = 0;
1524 }
1525 if (copy_to_user((struct mxser_mstatus *) arg, GMStatus, sizeof(struct mxser_mstatus) * MXSER_PORTS))
1526 return -EFAULT;
1527 return 0;
1528 case MOXA_ASPP_MON_EXT:{
1529 int status;
1530 int opmode, p;
1531 int shiftbit;
1532 unsigned cflag, iflag;
1534 for (i = 0; i < MXSER_PORTS; i++) {
1536 if (!mxvar_table[i].base)
1537 continue;
1539 status = mxser_get_msr(mxvar_table[i].base, 0, i, &(mxvar_table[i]));
1540 // mxser_check_modem_status(&mxvar_table[i], status);
1541 if (status & UART_MSR_TERI)
1542 mxvar_table[i].icount.rng++;
1543 if (status & UART_MSR_DDSR)
1544 mxvar_table[i].icount.dsr++;
1545 if (status & UART_MSR_DDCD)
1546 mxvar_table[i].icount.dcd++;
1547 if (status & UART_MSR_DCTS)
1548 mxvar_table[i].icount.cts++;
1550 mxvar_table[i].mon_data.modem_status = status;
1551 mon_data_ext.rx_cnt[i] = mxvar_table[i].mon_data.rxcnt;
1552 mon_data_ext.tx_cnt[i] = mxvar_table[i].mon_data.txcnt;
1553 mon_data_ext.up_rxcnt[i] = mxvar_table[i].mon_data.up_rxcnt;
1554 mon_data_ext.up_txcnt[i] = mxvar_table[i].mon_data.up_txcnt;
1555 mon_data_ext.modem_status[i] = mxvar_table[i].mon_data.modem_status;
1556 mon_data_ext.baudrate[i] = mxvar_table[i].realbaud;
1558 if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios) {
1559 cflag = mxvar_table[i].normal_termios.c_cflag;
1560 iflag = mxvar_table[i].normal_termios.c_iflag;
1561 } else {
1562 cflag = mxvar_table[i].tty->termios->c_cflag;
1563 iflag = mxvar_table[i].tty->termios->c_iflag;
1564 }
1566 mon_data_ext.databits[i] = cflag & CSIZE;
1568 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1570 mon_data_ext.parity[i] = cflag & (PARENB | PARODD | CMSPAR);
1572 mon_data_ext.flowctrl[i] = 0x00;
1574 if (cflag & CRTSCTS)
1575 mon_data_ext.flowctrl[i] |= 0x03;
1577 if (iflag & (IXON | IXOFF))
1578 mon_data_ext.flowctrl[i] |= 0x0C;
1580 if (mxvar_table[i].type == PORT_16550A)
1581 mon_data_ext.fifo[i] = 1;
1582 else
1583 mon_data_ext.fifo[i] = 0;
1585 p = i % 4;
1586 shiftbit = p * 2;
1587 opmode = inb(mxvar_table[i].opmode_ioaddr) >> shiftbit;
1588 opmode &= OP_MODE_MASK;
1590 mon_data_ext.iftype[i] = opmode;
1592 }
1593 if (copy_to_user((struct mxser_mon_ext *) arg, &mon_data_ext, sizeof(struct mxser_mon_ext)))
1594 return -EFAULT;
1596 return 0;
1598 }
1599 default:
1600 return -ENOIOCTLCMD;
1601 }
1602 return 0;
1603 }
1606 static void mxser_stoprx(struct tty_struct *tty)
1607 {
1608 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1609 //unsigned long flags;
1612 info->ldisc_stop_rx = 1;
1613 if (I_IXOFF(tty)) {
1615 //MX_LOCK(&info->slock);
1616 // following add by Victor Yu. 09-02-2002
1617 if (info->IsMoxaMustChipFlag) {
1618 info->IER &= ~MOXA_MUST_RECV_ISR;
1619 outb(info->IER, info->base + UART_IER);
1620 } else {
1621 // above add by Victor Yu. 09-02-2002
1623 info->x_char = STOP_CHAR(tty);
1624 // outb(info->IER, 0); // mask by Victor Yu. 09-02-2002
1625 outb(0, info->base + UART_IER);
1626 info->IER |= UART_IER_THRI;
1627 outb(info->IER, info->base + UART_IER); /* force Tx interrupt */
1628 } // add by Victor Yu. 09-02-2002
1629 //MX_UNLOCK(&info->slock);
1630 }
1632 if (info->tty->termios->c_cflag & CRTSCTS) {
1633 //MX_LOCK(&info->slock);
1634 info->MCR &= ~UART_MCR_RTS;
1635 outb(info->MCR, info->base + UART_MCR);
1636 //MX_UNLOCK(&info->slock);
1637 }
1638 }
1640 static void mxser_startrx(struct tty_struct *tty)
1641 {
1642 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1643 //unsigned long flags;
1645 info->ldisc_stop_rx = 0;
1646 if (I_IXOFF(tty)) {
1647 if (info->x_char)
1648 info->x_char = 0;
1649 else {
1650 //MX_LOCK(&info->slock);
1652 // following add by Victor Yu. 09-02-2002
1653 if (info->IsMoxaMustChipFlag) {
1654 info->IER |= MOXA_MUST_RECV_ISR;
1655 outb(info->IER, info->base + UART_IER);
1656 } else {
1657 // above add by Victor Yu. 09-02-2002
1659 info->x_char = START_CHAR(tty);
1660 // outb(info->IER, 0); // mask by Victor Yu. 09-02-2002
1661 outb(0, info->base + UART_IER); // add by Victor Yu. 09-02-2002
1662 info->IER |= UART_IER_THRI; /* force Tx interrupt */
1663 outb(info->IER, info->base + UART_IER);
1664 } // add by Victor Yu. 09-02-2002
1665 //MX_UNLOCK(&info->slock);
1666 }
1667 }
1669 if (info->tty->termios->c_cflag & CRTSCTS) {
1670 //MX_LOCK(&info->slock);
1671 info->MCR |= UART_MCR_RTS;
1672 outb(info->MCR, info->base + UART_MCR);
1673 //MX_UNLOCK(&info->slock);
1674 }
1675 }
1677 /*
1678 * This routine is called by the upper-layer tty layer to signal that
1679 * incoming characters should be throttled.
1680 */
1681 static void mxser_throttle(struct tty_struct *tty)
1682 {
1683 //struct mxser_struct *info = (struct mxser_struct *)tty->driver_data;
1684 //unsigned long flags;
1685 //MX_LOCK(&info->slock);
1686 mxser_stoprx(tty);
1687 //MX_UNLOCK(&info->slock);
1688 }
1690 static void mxser_unthrottle(struct tty_struct *tty)
1691 {
1692 //struct mxser_struct *info = (struct mxser_struct *)tty->driver_data;
1693 //unsigned long flags;
1694 //MX_LOCK(&info->slock);
1695 mxser_startrx(tty);
1696 //MX_UNLOCK(&info->slock);
1697 }
1699 static void mxser_set_termios(struct tty_struct *tty, struct termios *old_termios)
1700 {
1701 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1702 unsigned long flags;
1704 if ((tty->termios->c_cflag != old_termios->c_cflag) || (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
1706 mxser_change_speed(info, old_termios);
1708 if ((old_termios->c_cflag & CRTSCTS) && !(tty->termios->c_cflag & CRTSCTS)) {
1709 tty->hw_stopped = 0;
1710 mxser_start(tty);
1711 }
1712 }
1714 /* Handle sw stopped */
1715 if ((old_termios->c_iflag & IXON) && !(tty->termios->c_iflag & IXON)) {
1716 tty->stopped = 0;
1718 // following add by Victor Yu. 09-02-2002
1719 if (info->IsMoxaMustChipFlag) {
1720 spin_lock_irqsave(&info->slock, flags);
1721 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
1722 spin_unlock_irqrestore(&info->slock, flags);
1723 }
1724 // above add by Victor Yu. 09-02-2002
1726 mxser_start(tty);
1727 }
1728 }
1730 /*
1731 * mxser_stop() and mxser_start()
1732 *
1733 * This routines are called before setting or resetting tty->stopped.
1734 * They enable or disable transmitter interrupts, as necessary.
1735 */
1736 static void mxser_stop(struct tty_struct *tty)
1737 {
1738 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1739 unsigned long flags;
1741 spin_lock_irqsave(&info->slock, flags);
1742 if (info->IER & UART_IER_THRI) {
1743 info->IER &= ~UART_IER_THRI;
1744 outb(info->IER, info->base + UART_IER);
1745 }
1746 spin_unlock_irqrestore(&info->slock, flags);
1747 }
1749 static void mxser_start(struct tty_struct *tty)
1750 {
1751 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1752 unsigned long flags;
1754 spin_lock_irqsave(&info->slock, flags);
1755 if (info->xmit_cnt && info->xmit_buf && !(info->IER & UART_IER_THRI)) {
1756 info->IER |= UART_IER_THRI;
1757 outb(info->IER, info->base + UART_IER);
1758 }
1759 spin_unlock_irqrestore(&info->slock, flags);
1760 }
1762 /*
1763 * mxser_wait_until_sent() --- wait until the transmitter is empty
1764 */
1765 static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1766 {
1767 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1768 unsigned long orig_jiffies, char_time;
1769 int lsr;
1771 if (info->type == PORT_UNKNOWN)
1772 return;
1774 if (info->xmit_fifo_size == 0)
1775 return; /* Just in case.... */
1777 orig_jiffies = jiffies;
1778 /*
1779 * Set the check interval to be 1/5 of the estimated time to
1780 * send a single character, and make it at least 1. The check
1781 * interval should also be less than the timeout.
1782 *
1783 * Note: we have to use pretty tight timings here to satisfy
1784 * the NIST-PCTS.
1785 */
1786 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1787 char_time = char_time / 5;
1788 if (char_time == 0)
1789 char_time = 1;
1790 if (timeout && timeout < char_time)
1791 char_time = timeout;
1792 /*
1793 * If the transmitter hasn't cleared in twice the approximate
1794 * amount of time to send the entire FIFO, it probably won't
1795 * ever clear. This assumes the UART isn't doing flow
1796 * control, which is currently the case. Hence, if it ever
1797 * takes longer than info->timeout, this is probably due to a
1798 * UART bug of some kind. So, we clamp the timeout parameter at
1799 * 2*info->timeout.
1800 */
1801 if (!timeout || timeout > 2 * info->timeout)
1802 timeout = 2 * info->timeout;
1803 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1804 printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...", timeout, char_time);
1805 printk("jiff=%lu...", jiffies);
1806 #endif
1807 while (!((lsr = inb(info->base + UART_LSR)) & UART_LSR_TEMT)) {
1808 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1809 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1810 #endif
1811 set_current_state(TASK_INTERRUPTIBLE);
1812 schedule_timeout(char_time);
1813 if (signal_pending(current))
1814 break;
1815 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1816 break;
1817 }
1818 set_current_state(TASK_RUNNING);
1820 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1821 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1822 #endif
1823 }
1826 /*
1827 * This routine is called by tty_hangup() when a hangup is signaled.
1828 */
1829 void mxser_hangup(struct tty_struct *tty)
1830 {
1831 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1833 mxser_flush_buffer(tty);
1834 mxser_shutdown(info);
1835 info->event = 0;
1836 info->count = 0;
1837 info->flags &= ~ASYNC_NORMAL_ACTIVE;
1838 info->tty = 0;
1839 wake_up_interruptible(&info->open_wait);
1840 }
1843 // added by James 03-12-2004.
1844 /*
1845 * mxser_rs_break() --- routine which turns the break handling on or off
1846 */
1847 static void mxser_rs_break(struct tty_struct *tty, int break_state)
1848 {
1849 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
1850 unsigned long flags;
1852 spin_lock_irqsave(&info->slock, flags);
1853 if (break_state == -1)
1854 outb(inb(info->base + UART_LCR) | UART_LCR_SBC, info->base + UART_LCR);
1855 else
1856 outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC, info->base + UART_LCR);
1857 spin_unlock_irqrestore(&info->slock, flags);
1858 }
1860 // (above) added by James.
1863 /*
1864 * This is the serial driver's generic interrupt routine
1865 */
1866 static irqreturn_t mxser_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1867 {
1868 int status, iir, i;
1869 struct mxser_struct *info;
1870 struct mxser_struct *port;
1871 int max, irqbits, bits, msr;
1872 int pass_counter = 0;
1873 int handled = IRQ_NONE;
1875 port = 0;
1876 //spin_lock(&gm_lock);
1878 for (i = 0; i < MXSER_BOARDS; i++) {
1879 if (dev_id == &(mxvar_table[i * MXSER_PORTS_PER_BOARD])) {
1880 port = dev_id;
1881 break;
1882 }
1883 }
1885 if (i == MXSER_BOARDS) {
1886 goto irq_stop;
1887 }
1888 if (port == 0) {
1889 goto irq_stop;
1890 }
1891 max = mxser_numports[mxsercfg[i].board_type - 1];
1892 while (1) {
1893 irqbits = inb(port->vector) & port->vectormask;
1894 if (irqbits == port->vectormask) {
1895 break;
1896 }
1898 handled = IRQ_HANDLED;
1899 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
1900 if (irqbits == port->vectormask) {
1901 break;
1902 }
1903 if (bits & irqbits)
1904 continue;
1905 info = port + i;
1907 // following add by Victor Yu. 09-13-2002
1908 iir = inb(info->base + UART_IIR);
1909 if (iir & UART_IIR_NO_INT)
1910 continue;
1911 iir &= MOXA_MUST_IIR_MASK;
1912 if (!info->tty) {
1913 status = inb(info->base + UART_LSR);
1914 outb(0x27, info->base + UART_FCR);
1915 inb(info->base + UART_MSR);
1916 continue;
1917 }
1918 // above add by Victor Yu. 09-13-2002
1919 /*
1920 if ( info->tty->flip.count < TTY_FLIPBUF_SIZE/4 ){
1921 info->IER |= MOXA_MUST_RECV_ISR;
1922 outb(info->IER, info->base + UART_IER);
1923 }
1924 */
1927 /* mask by Victor Yu. 09-13-2002
1928 if ( !info->tty ||
1929 (inb(info->base + UART_IIR) & UART_IIR_NO_INT) )
1930 continue;
1931 */
1932 /* mask by Victor Yu. 09-02-2002
1933 status = inb(info->base + UART_LSR) & info->read_status_mask;
1934 */
1936 // following add by Victor Yu. 09-02-2002
1937 status = inb(info->base + UART_LSR);
1939 if (status & UART_LSR_PE) {
1940 info->err_shadow |= NPPI_NOTIFY_PARITY;
1941 }
1942 if (status & UART_LSR_FE) {
1943 info->err_shadow |= NPPI_NOTIFY_FRAMING;
1944 }
1945 if (status & UART_LSR_OE) {
1946 info->err_shadow |= NPPI_NOTIFY_HW_OVERRUN;
1947 }
1948 if (status & UART_LSR_BI)
1949 info->err_shadow |= NPPI_NOTIFY_BREAK;
1951 if (info->IsMoxaMustChipFlag) {
1952 /*
1953 if ( (status & 0x02) && !(status & 0x01) ) {
1954 outb(info->base+UART_FCR, 0x23);
1955 continue;
1956 }
1957 */
1958 if (iir == MOXA_MUST_IIR_GDA || iir == MOXA_MUST_IIR_RDA || iir == MOXA_MUST_IIR_RTO || iir == MOXA_MUST_IIR_LSR)
1959 mxser_receive_chars(info, &status);
1961 } else {
1962 // above add by Victor Yu. 09-02-2002
1964 status &= info->read_status_mask;
1965 if (status & UART_LSR_DR)
1966 mxser_receive_chars(info, &status);
1967 }
1968 msr = inb(info->base + UART_MSR);
1969 if (msr & UART_MSR_ANY_DELTA) {
1970 mxser_check_modem_status(info, msr);
1971 }
1972 // following add by Victor Yu. 09-13-2002
1973 if (info->IsMoxaMustChipFlag) {
1974 if ((iir == 0x02) && (status & UART_LSR_THRE)) {
1975 mxser_transmit_chars(info);
1976 }
1977 } else {
1978 // above add by Victor Yu. 09-13-2002
1980 if (status & UART_LSR_THRE) {
1981 /* 8-2-99 by William
1982 if ( info->x_char || (info->xmit_cnt > 0) )
1983 */
1984 mxser_transmit_chars(info);
1985 }
1986 }
1987 }
1988 if (pass_counter++ > MXSER_ISR_PASS_LIMIT) {
1989 break; /* Prevent infinite loops */
1990 }
1991 }
1993 irq_stop:
1994 //spin_unlock(&gm_lock);
1995 return handled;
1996 }
1998 static void mxser_receive_chars(struct mxser_struct *info, int *status)
1999 {
2000 struct tty_struct *tty = info->tty;
2001 unsigned char ch, gdl;
2002 int ignored = 0;
2003 int cnt = 0;
2004 unsigned char *cp;
2005 char *fp;
2006 int count;
2007 int recv_room;
2008 int max = 256;
2009 unsigned long flags;
2011 spin_lock_irqsave(&info->slock, flags);
2013 recv_room = tty->ldisc.receive_room(tty);
2014 if ((recv_room == 0) && (!info->ldisc_stop_rx)) {
2015 //mxser_throttle(tty);
2016 mxser_stoprx(tty);
2017 //return;
2018 }
2020 cp = tty->flip.char_buf;
2021 fp = tty->flip.flag_buf;
2022 count = 0;
2024 // following add by Victor Yu. 09-02-2002
2025 if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
2027 if (*status & UART_LSR_SPECIAL) {
2028 goto intr_old;
2029 }
2030 // following add by Victor Yu. 02-11-2004
2031 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID && (*status & MOXA_MUST_LSR_RERR))
2032 goto intr_old;
2033 // above add by Victor Yu. 02-14-2004
2034 if (*status & MOXA_MUST_LSR_RERR)
2035 goto intr_old;
2037 gdl = inb(info->base + MOXA_MUST_GDL_REGISTER);
2039 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU150_HWID) // add by Victor Yu. 02-11-2004
2040 gdl &= MOXA_MUST_GDL_MASK;
2041 if (gdl >= recv_room) {
2042 if (!info->ldisc_stop_rx) {
2043 //mxser_throttle(tty);
2044 mxser_stoprx(tty);
2045 }
2046 //return;
2047 }
2048 while (gdl--) {
2049 ch = inb(info->base + UART_RX);
2050 count++;
2051 *cp++ = ch;
2052 *fp++ = 0;
2053 cnt++;
2054 /*
2055 if((count>=HI_WATER) && (info->stop_rx==0)){
2056 mxser_stoprx(tty);
2057 info->stop_rx=1;
2058 break;
2059 } */
2060 }
2061 goto end_intr;
2062 }
2063 intr_old:
2064 // above add by Victor Yu. 09-02-2002
2066 do {
2067 if (max-- < 0)
2068 break;
2069 /*
2070 if((count>=HI_WATER) && (info->stop_rx==0)){
2071 mxser_stoprx(tty);
2072 info->stop_rx=1;
2073 break;
2074 }
2075 */
2077 ch = inb(info->base + UART_RX);
2078 // following add by Victor Yu. 09-02-2002
2079 if (info->IsMoxaMustChipFlag && (*status & UART_LSR_OE) /*&& !(*status&UART_LSR_DR) */ )
2080 outb(0x23, info->base + UART_FCR);
2081 *status &= info->read_status_mask;
2082 // above add by Victor Yu. 09-02-2002
2083 if (*status & info->ignore_status_mask) {
2084 if (++ignored > 100)
2085 break;
2086 } else {
2087 count++;
2088 if (*status & UART_LSR_SPECIAL) {
2089 if (*status & UART_LSR_BI) {
2090 *fp++ = TTY_BREAK;
2091 /* added by casper 1/11/2000 */
2092 info->icount.brk++;
2094 /* */
2095 if (info->flags & ASYNC_SAK)
2096 do_SAK(tty);
2097 } else if (*status & UART_LSR_PE) {
2098 *fp++ = TTY_PARITY;
2099 /* added by casper 1/11/2000 */
2100 info->icount.parity++;
2101 /* */
2102 } else if (*status & UART_LSR_FE) {
2103 *fp++ = TTY_FRAME;
2104 /* added by casper 1/11/2000 */
2105 info->icount.frame++;
2106 /* */
2107 } else if (*status & UART_LSR_OE) {
2108 *fp++ = TTY_OVERRUN;
2109 /* added by casper 1/11/2000 */
2110 info->icount.overrun++;
2111 /* */
2112 } else
2113 *fp++ = 0;
2114 } else
2115 *fp++ = 0;
2116 *cp++ = ch;
2117 cnt++;
2118 if (cnt >= recv_room) {
2119 if (!info->ldisc_stop_rx) {
2120 //mxser_throttle(tty);
2121 mxser_stoprx(tty);
2122 }
2123 break;
2124 }
2126 }
2128 // following add by Victor Yu. 09-02-2002
2129 if (info->IsMoxaMustChipFlag)
2130 break;
2131 // above add by Victor Yu. 09-02-2002
2133 /* mask by Victor Yu. 09-02-2002
2134 *status = inb(info->base + UART_LSR) & info->read_status_mask;
2135 */
2136 // following add by Victor Yu. 09-02-2002
2137 *status = inb(info->base + UART_LSR);
2138 // above add by Victor Yu. 09-02-2002
2139 } while (*status & UART_LSR_DR);
2141 end_intr: // add by Victor Yu. 09-02-2002
2143 mxvar_log.rxcnt[info->port] += cnt;
2144 info->mon_data.rxcnt += cnt;
2145 info->mon_data.up_rxcnt += cnt;
2147 tty->ldisc.receive_buf(tty, tty->flip.char_buf, tty->flip.flag_buf, count);
2148 spin_unlock_irqrestore(&info->slock, flags);
2150 }
2152 static void mxser_transmit_chars(struct mxser_struct *info)
2153 {
2154 int count, cnt;
2155 unsigned long flags;
2157 spin_lock_irqsave(&info->slock, flags);
2159 if (info->x_char) {
2160 outb(info->x_char, info->base + UART_TX);
2161 info->x_char = 0;
2162 mxvar_log.txcnt[info->port]++;
2163 info->mon_data.txcnt++;
2164 info->mon_data.up_txcnt++;
2166 /* added by casper 1/11/2000 */
2167 info->icount.tx++;
2168 /* */
2169 spin_unlock_irqrestore(&info->slock, flags);
2170 return;
2171 }
2173 if (info->xmit_buf == 0) {
2174 spin_unlock_irqrestore(&info->slock, flags);
2175 return;
2176 }
2178 if ((info->xmit_cnt <= 0) || info->tty->stopped || (info->tty->hw_stopped && (info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag))) {
2179 info->IER &= ~UART_IER_THRI;
2180 outb(info->IER, info->base + UART_IER);
2181 spin_unlock_irqrestore(&info->slock, flags);
2182 return;
2183 }
2185 cnt = info->xmit_cnt;
2186 count = info->xmit_fifo_size;
2187 do {
2188 outb(info->xmit_buf[info->xmit_tail++], info->base + UART_TX);
2189 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2190 if (--info->xmit_cnt <= 0)
2191 break;
2192 } while (--count > 0);
2193 mxvar_log.txcnt[info->port] += (cnt - info->xmit_cnt);
2195 // added by James 03-12-2004.
2196 info->mon_data.txcnt += (cnt - info->xmit_cnt);
2197 info->mon_data.up_txcnt += (cnt - info->xmit_cnt);
2198 // (above) added by James.
2200 /* added by casper 1/11/2000 */
2201 info->icount.tx += (cnt - info->xmit_cnt);
2202 /* */
2204 if (info->xmit_cnt < WAKEUP_CHARS) {
2205 set_bit(MXSER_EVENT_TXLOW, &info->event);
2206 schedule_work(&info->tqueue);
2207 }
2208 if (info->xmit_cnt <= 0) {
2209 info->IER &= ~UART_IER_THRI;
2210 outb(info->IER, info->base + UART_IER);
2211 }
2212 spin_unlock_irqrestore(&info->slock, flags);
2213 }
2215 static void mxser_check_modem_status(struct mxser_struct *info, int status)
2216 {
2217 /* update input line counters */
2218 if (status & UART_MSR_TERI)
2219 info->icount.rng++;
2220 if (status & UART_MSR_DDSR)
2221 info->icount.dsr++;
2222 if (status & UART_MSR_DDCD)
2223 info->icount.dcd++;
2224 if (status & UART_MSR_DCTS)
2225 info->icount.cts++;
2226 info->mon_data.modem_status = status;
2227 wake_up_interruptible(&info->delta_msr_wait);
2230 if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
2231 if (status & UART_MSR_DCD)
2232 wake_up_interruptible(&info->open_wait);
2233 schedule_work(&info->tqueue);
2234 }
2236 if (info->flags & ASYNC_CTS_FLOW) {
2237 if (info->tty->hw_stopped) {
2238 if (status & UART_MSR_CTS) {
2239 info->tty->hw_stopped = 0;
2241 if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2242 info->IER |= UART_IER_THRI;
2243 outb(info->IER, info->base + UART_IER);
2244 }
2245 set_bit(MXSER_EVENT_TXLOW, &info->event);
2246 schedule_work(&info->tqueue); }
2247 } else {
2248 if (!(status & UART_MSR_CTS)) {
2249 info->tty->hw_stopped = 1;
2250 if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2251 info->IER &= ~UART_IER_THRI;
2252 outb(info->IER, info->base + UART_IER);
2253 }
2254 }
2255 }
2256 }
2257 }
2259 static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, struct mxser_struct *info)
2260 {
2261 DECLARE_WAITQUEUE(wait, current);
2262 int retval;
2263 int do_clocal = 0;
2264 unsigned long flags;
2266 /*
2267 * If non-blocking mode is set, or the port is not enabled,
2268 * then make the check up front and then exit.
2269 */
2270 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2271 info->flags |= ASYNC_NORMAL_ACTIVE;
2272 return (0);
2273 }
2275 if (tty->termios->c_cflag & CLOCAL)
2276 do_clocal = 1;
2278 /*
2279 * Block waiting for the carrier detect and the line to become
2280 * free (i.e., not in use by the callout). While we are in
2281 * this loop, info->count is dropped by one, so that
2282 * mxser_close() knows when to free things. We restore it upon
2283 * exit, either normal or abnormal.
2284 */
2285 retval = 0;
2286 add_wait_queue(&info->open_wait, &wait);
2288 spin_lock_irqsave(&info->slock, flags);
2289 if (!tty_hung_up_p(filp))
2290 info->count--;
2291 spin_unlock_irqrestore(&info->slock, flags);
2292 info->blocked_open++;
2293 while (1) {
2294 spin_lock_irqsave(&info->slock, flags);
2295 outb(inb(info->base + UART_MCR) | UART_MCR_DTR | UART_MCR_RTS, info->base + UART_MCR);
2296 spin_unlock_irqrestore(&info->slock, flags);
2297 set_current_state(TASK_INTERRUPTIBLE);
2298 if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)) {
2299 if (info->flags & ASYNC_HUP_NOTIFY)
2300 retval = -EAGAIN;
2301 else
2302 retval = -ERESTARTSYS;
2303 break;
2304 }
2305 if (!(info->flags & ASYNC_CLOSING) && (do_clocal || (inb(info->base + UART_MSR) & UART_MSR_DCD)))
2306 break;
2307 if (signal_pending(current)) {
2308 retval = -ERESTARTSYS;
2309 break;
2310 }
2311 schedule();
2312 }
2313 set_current_state(TASK_RUNNING);
2314 remove_wait_queue(&info->open_wait, &wait);
2315 if (!tty_hung_up_p(filp))
2316 info->count++;
2317 info->blocked_open--;
2318 if (retval)
2319 return (retval);
2320 info->flags |= ASYNC_NORMAL_ACTIVE;
2321 return (0);
2322 }
2324 static int mxser_startup(struct mxser_struct *info)
2325 {
2327 unsigned long page;
2328 unsigned long flags;
2330 page = __get_free_page(GFP_KERNEL);
2331 if (!page)
2332 return (-ENOMEM);
2334 spin_lock_irqsave(&info->slock, flags);
2336 if (info->flags & ASYNC_INITIALIZED) {
2337 free_page(page);
2338 spin_unlock_irqrestore(&info->slock, flags);
2339 return (0);
2340 }
2342 if (!info->base || !info->type) {
2343 if (info->tty)
2344 set_bit(TTY_IO_ERROR, &info->tty->flags);
2345 free_page(page);
2346 spin_unlock_irqrestore(&info->slock, flags);
2347 return (0);
2348 }
2349 if (info->xmit_buf)
2350 free_page(page);
2351 else
2352 info->xmit_buf = (unsigned char *) page;
2354 /*
2355 * Clear the FIFO buffers and disable them
2356 * (they will be reenabled in mxser_change_speed())
2357 */
2358 if (info->IsMoxaMustChipFlag)
2359 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2360 else
2361 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
2363 /*
2364 * At this point there's no way the LSR could still be 0xFF;
2365 * if it is, then bail out, because there's likely no UART
2366 * here.
2367 */
2368 if (inb(info->base + UART_LSR) == 0xff) {
2369 spin_unlock_irqrestore(&info->slock, flags);
2370 if (capable(CAP_SYS_ADMIN)) {
2371 if (info->tty)
2372 set_bit(TTY_IO_ERROR, &info->tty->flags);
2373 return (0);
2374 } else
2375 return (-ENODEV);
2376 }
2378 /*
2379 * Clear the interrupt registers.
2380 */
2381 (void) inb(info->base + UART_LSR);
2382 (void) inb(info->base + UART_RX);
2383 (void) inb(info->base + UART_IIR);
2384 (void) inb(info->base + UART_MSR);
2386 /*
2387 * Now, initialize the UART
2388 */
2389 outb(UART_LCR_WLEN8, info->base + UART_LCR); /* reset DLAB */
2390 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
2391 outb(info->MCR, info->base + UART_MCR);
2393 /*
2394 * Finally, enable interrupts
2395 */
2396 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
2397 // info->IER = UART_IER_RLSI | UART_IER_RDI;
2399 // following add by Victor Yu. 08-30-2002
2400 if (info->IsMoxaMustChipFlag)
2401 info->IER |= MOXA_MUST_IER_EGDAI;
2402 // above add by Victor Yu. 08-30-2002
2403 outb(info->IER, info->base + UART_IER); /* enable interrupts */
2405 /*
2406 * And clear the interrupt registers again for luck.
2407 */
2408 (void) inb(info->base + UART_LSR);
2409 (void) inb(info->base + UART_RX);
2410 (void) inb(info->base + UART_IIR);
2411 (void) inb(info->base + UART_MSR);
2413 if (info->tty)
2414 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2415 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2417 /*
2418 * and set the speed of the serial port
2419 */
2420 spin_unlock_irqrestore(&info->slock, flags);
2421 mxser_change_speed(info, 0);
2423 info->flags |= ASYNC_INITIALIZED;
2424 return (0);
2425 }
2427 /*
2428 * This routine will shutdown a serial port; interrupts maybe disabled, and
2429 * DTR is dropped if the hangup on close termio flag is on.
2430 */
2431 static void mxser_shutdown(struct mxser_struct *info)
2432 {
2433 unsigned long flags;
2435 if (!(info->flags & ASYNC_INITIALIZED))
2436 return;
2438 spin_lock_irqsave(&info->slock, flags);
2440 /*
2441 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
2442 * here so the queue might never be waken up
2443 */
2444 wake_up_interruptible(&info->delta_msr_wait);
2446 /*
2447 * Free the IRQ, if necessary
2448 */
2449 if (info->xmit_buf) {
2450 free_page((unsigned long) info->xmit_buf);
2451 info->xmit_buf = 0;
2452 }
2454 info->IER = 0;
2455 outb(0x00, info->base + UART_IER);
2457 if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
2458 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
2459 outb(info->MCR, info->base + UART_MCR);
2461 /* clear Rx/Tx FIFO's */
2462 // following add by Victor Yu. 08-30-2002
2463 if (info->IsMoxaMustChipFlag)
2464 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT | MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2465 else
2466 // above add by Victor Yu. 08-30-2002
2467 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT), info->base + UART_FCR);
2469 /* read data port to reset things */
2470 (void) inb(info->base + UART_RX);
2472 if (info->tty)
2473 set_bit(TTY_IO_ERROR, &info->tty->flags);
2475 info->flags &= ~ASYNC_INITIALIZED;
2477 // following add by Victor Yu. 09-23-2002
2478 if (info->IsMoxaMustChipFlag) {
2479 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->base);
2480 }
2481 // above add by Victor Yu. 09-23-2002
2483 spin_unlock_irqrestore(&info->slock, flags);
2484 }
2486 /*
2487 * This routine is called to set the UART divisor registers to match
2488 * the specified baud rate for a serial port.
2489 */
2490 static int mxser_change_speed(struct mxser_struct *info, struct termios *old_termios)
2491 {
2492 unsigned cflag, cval, fcr;
2493 int ret = 0;
2494 unsigned char status;
2495 long baud;
2496 unsigned long flags;
2499 if (!info->tty || !info->tty->termios)
2500 return ret;
2501 cflag = info->tty->termios->c_cflag;
2502 if (!(info->base))
2503 return ret;
2506 #ifndef B921600
2507 #define B921600 (B460800 +1)
2508 #endif
2509 if (mxser_set_baud_method[info->port] == 0) {
2510 switch (cflag & (CBAUD | CBAUDEX)) {
2511 case B921600:
2512 baud = 921600;
2513 break;
2514 case B460800:
2515 baud = 460800;
2516 break;
2517 case B230400:
2518 baud = 230400;
2519 break;
2520 case B115200:
2521 baud = 115200;
2522 break;
2523 case B57600:
2524 baud = 57600;
2525 break;
2526 case B38400:
2527 baud = 38400;
2528 break;
2529 case B19200:
2530 baud = 19200;
2531 break;
2532 case B9600:
2533 baud = 9600;
2534 break;
2535 case B4800:
2536 baud = 4800;
2537 break;
2538 case B2400:
2539 baud = 2400;
2540 break;
2541 case B1800:
2542 baud = 1800;
2543 break;
2544 case B1200:
2545 baud = 1200;
2546 break;
2547 case B600:
2548 baud = 600;
2549 break;
2550 case B300:
2551 baud = 300;
2552 break;
2553 case B200:
2554 baud = 200;
2555 break;
2556 case B150:
2557 baud = 150;
2558 break;
2559 case B134:
2560 baud = 134;
2561 break;
2562 case B110:
2563 baud = 110;
2564 break;
2565 case B75:
2566 baud = 75;
2567 break;
2568 case B50:
2569 baud = 50;
2570 break;
2571 default:
2572 baud = 0;
2573 break;
2574 }
2575 mxser_set_baud(info, baud);
2576 }
2578 /* byte size and parity */
2579 switch (cflag & CSIZE) {
2580 case CS5:
2581 cval = 0x00;
2582 break;
2583 case CS6:
2584 cval = 0x01;
2585 break;
2586 case CS7:
2587 cval = 0x02;
2588 break;
2589 case CS8:
2590 cval = 0x03;
2591 break;
2592 default:
2593 cval = 0x00;
2594 break; /* too keep GCC shut... */
2595 }
2596 if (cflag & CSTOPB)
2597 cval |= 0x04;
2598 if (cflag & PARENB)
2599 cval |= UART_LCR_PARITY;
2600 #ifndef CMSPAR
2601 #define CMSPAR 010000000000
2602 #endif
2603 if (!(cflag & PARODD)) {
2604 cval |= UART_LCR_EPAR;
2605 }
2606 if (cflag & CMSPAR)
2607 cval |= UART_LCR_SPAR;
2609 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
2610 if (info->IsMoxaMustChipFlag) {
2611 fcr = UART_FCR_ENABLE_FIFO;
2612 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2613 SET_MOXA_MUST_FIFO_VALUE(info);
2614 } else
2615 fcr = 0;
2616 } else {
2617 fcr = UART_FCR_ENABLE_FIFO;
2618 // following add by Victor Yu. 08-30-2002
2619 if (info->IsMoxaMustChipFlag) {
2620 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2621 SET_MOXA_MUST_FIFO_VALUE(info);
2622 } else {
2623 // above add by Victor Yu. 08-30-2002
2625 switch (info->rx_trigger) {
2626 case 1:
2627 fcr |= UART_FCR_TRIGGER_1;
2628 break;
2629 case 4:
2630 fcr |= UART_FCR_TRIGGER_4;
2631 break;
2632 case 8:
2633 fcr |= UART_FCR_TRIGGER_8;
2634 break;
2635 default:
2636 fcr |= UART_FCR_TRIGGER_14;
2637 break;
2638 }
2639 }
2640 }
2642 /* CTS flow control flag and modem status interrupts */
2643 info->IER &= ~UART_IER_MSI;
2644 info->MCR &= ~UART_MCR_AFE;
2645 if (cflag & CRTSCTS) {
2646 info->flags |= ASYNC_CTS_FLOW;
2647 info->IER |= UART_IER_MSI;
2648 if ((info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
2649 info->MCR |= UART_MCR_AFE;
2650 //status = mxser_get_msr(info->base, 0, info->port);
2651 /* save_flags(flags);
2652 cli();
2653 status = inb(baseaddr + UART_MSR);
2654 restore_flags(flags);*/
2655 //mxser_check_modem_status(info, status);
2656 } else {
2657 //status = mxser_get_msr(info->base, 0, info->port);
2659 //MX_LOCK(&info->slock);
2660 status = inb(info->base + UART_MSR);
2661 //MX_UNLOCK(&info->slock);
2662 if (info->tty->hw_stopped) {
2663 if (status & UART_MSR_CTS) {
2664 info->tty->hw_stopped = 0;
2665 if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2666 info->IER |= UART_IER_THRI;
2667 outb(info->IER, info->base + UART_IER);
2668 }
2669 set_bit(MXSER_EVENT_TXLOW, &info->event);
2670 schedule_work(&info->tqueue); }
2671 } else {
2672 if (!(status & UART_MSR_CTS)) {
2673 info->tty->hw_stopped = 1;
2674 if ((info->type != PORT_16550A) && (!info->IsMoxaMustChipFlag)) {
2675 info->IER &= ~UART_IER_THRI;
2676 outb(info->IER, info->base + UART_IER);
2677 }
2678 }
2679 }
2680 }
2681 } else {
2682 info->flags &= ~ASYNC_CTS_FLOW;
2683 }
2684 outb(info->MCR, info->base + UART_MCR);
2685 if (cflag & CLOCAL) {
2686 info->flags &= ~ASYNC_CHECK_CD;
2687 } else {
2688 info->flags |= ASYNC_CHECK_CD;
2689 info->IER |= UART_IER_MSI;
2690 }
2691 outb(info->IER, info->base + UART_IER);
2693 /*
2694 * Set up parity check flag
2695 */
2696 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
2697 if (I_INPCK(info->tty))
2698 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
2699 if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
2700 info->read_status_mask |= UART_LSR_BI;
2702 info->ignore_status_mask = 0;
2704 if (I_IGNBRK(info->tty)) {
2705 info->ignore_status_mask |= UART_LSR_BI;
2706 info->read_status_mask |= UART_LSR_BI;
2707 /*
2708 * If we're ignore parity and break indicators, ignore
2709 * overruns too. (For real raw support).
2710 */
2711 if (I_IGNPAR(info->tty)) {
2712 info->ignore_status_mask |= UART_LSR_OE | UART_LSR_PE | UART_LSR_FE;
2713 info->read_status_mask |= UART_LSR_OE | UART_LSR_PE | UART_LSR_FE;
2714 }
2715 }
2716 // following add by Victor Yu. 09-02-2002
2717 if (info->IsMoxaMustChipFlag) {
2718 spin_lock_irqsave(&info->slock, flags);
2719 SET_MOXA_MUST_XON1_VALUE(info->base, START_CHAR(info->tty));
2720 SET_MOXA_MUST_XOFF1_VALUE(info->base, STOP_CHAR(info->tty));
2721 if (I_IXON(info->tty)) {
2722 ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2723 } else {
2724 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2725 }
2726 if (I_IXOFF(info->tty)) {
2727 ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2728 } else {
2729 DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2730 }
2731 /*
2732 if ( I_IXANY(info->tty) ) {
2733 info->MCR |= MOXA_MUST_MCR_XON_ANY;
2734 ENABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2735 } else {
2736 info->MCR &= ~MOXA_MUST_MCR_XON_ANY;
2737 DISABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2738 }
2739 */
2740 spin_unlock_irqrestore(&info->slock, flags);
2741 }
2742 // above add by Victor Yu. 09-02-2002
2745 outb(fcr, info->base + UART_FCR); /* set fcr */
2746 outb(cval, info->base + UART_LCR);
2748 return ret;
2749 }
2752 static int mxser_set_baud(struct mxser_struct *info, long newspd)
2753 {
2754 int quot = 0;
2755 unsigned char cval;
2756 int ret = 0;
2757 unsigned long flags;
2759 if (!info->tty || !info->tty->termios)
2760 return ret;
2762 if (!(info->base))
2763 return ret;
2765 if (newspd > info->MaxCanSetBaudRate)
2766 return 0;
2768 info->realbaud = newspd;
2769 if (newspd == 134) {
2770 quot = (2 * info->baud_base / 269);
2771 } else if (newspd) {
2772 quot = info->baud_base / newspd;
2774 if (quot == 0)
2775 quot = 1;
2777 } else {
2778 quot = 0;
2779 }
2781 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
2782 info->timeout += HZ / 50; /* Add .02 seconds of slop */
2784 if (quot) {
2785 spin_lock_irqsave(&info->slock, flags);
2786 info->MCR |= UART_MCR_DTR;
2787 outb(info->MCR, info->base + UART_MCR);
2788 spin_unlock_irqrestore(&info->slock, flags);
2789 } else {
2790 spin_lock_irqsave(&info->slock, flags);
2791 info->MCR &= ~UART_MCR_DTR;
2792 outb(info->MCR, info->base + UART_MCR);
2793 spin_unlock_irqrestore(&info->slock, flags);
2794 return ret;
2795 }
2797 cval = inb(info->base + UART_LCR);
2799 outb(cval | UART_LCR_DLAB, info->base + UART_LCR); /* set DLAB */
2801 outb(quot & 0xff, info->base + UART_DLL); /* LS of divisor */
2802 outb(quot >> 8, info->base + UART_DLM); /* MS of divisor */
2803 outb(cval, info->base + UART_LCR); /* reset DLAB */
2806 return ret;
2807 }
2811 /*
2812 * ------------------------------------------------------------
2813 * friends of mxser_ioctl()
2814 * ------------------------------------------------------------
2815 */
2816 static int mxser_get_serial_info(struct mxser_struct *info, struct serial_struct *retinfo)
2817 {
2818 struct serial_struct tmp;
2820 if (!retinfo)
2821 return (-EFAULT);
2822 memset(&tmp, 0, sizeof(tmp));
2823 tmp.type = info->type;
2824 tmp.line = info->port;
2825 tmp.port = info->base;
2826 tmp.irq = info->irq;
2827 tmp.flags = info->flags;
2828 tmp.baud_base = info->baud_base;
2829 tmp.close_delay = info->close_delay;
2830 tmp.closing_wait = info->closing_wait;
2831 tmp.custom_divisor = info->custom_divisor;
2832 tmp.hub6 = 0;
2833 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2834 return -EFAULT;
2835 return (0);
2836 }
2838 static int mxser_set_serial_info(struct mxser_struct *info, struct serial_struct *new_info)
2839 {
2840 struct serial_struct new_serial;
2841 unsigned int flags;
2842 int retval = 0;
2844 if (!new_info || !info->base)
2845 return (-EFAULT);
2846 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2847 return -EFAULT;
2849 if ((new_serial.irq != info->irq) || (new_serial.port != info->base) || (new_serial.custom_divisor != info->custom_divisor) || (new_serial.baud_base != info->baud_base))
2850 return (-EPERM);
2852 flags = info->flags & ASYNC_SPD_MASK;
2854 if (!capable(CAP_SYS_ADMIN)) {
2855 if ((new_serial.baud_base != info->baud_base) || (new_serial.close_delay != info->close_delay) || ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
2856 return (-EPERM);
2857 info->flags = ((info->flags & ~ASYNC_USR_MASK) | (new_serial.flags & ASYNC_USR_MASK));
2858 } else {
2859 /*
2860 * OK, past this point, all the error checking has been done.
2861 * At this point, we start making changes.....
2862 */
2863 info->flags = ((info->flags & ~ASYNC_FLAGS) | (new_serial.flags & ASYNC_FLAGS));
2864 info->close_delay = new_serial.close_delay * HZ / 100;
2865 info->closing_wait = new_serial.closing_wait * HZ / 100;
2866 info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2867 info->tty->low_latency = 0; //(info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2868 }
2870 /* added by casper, 3/17/2000, for mouse */
2871 info->type = new_serial.type;
2873 process_txrx_fifo(info);
2875 /* */
2876 if (info->flags & ASYNC_INITIALIZED) {
2877 if (flags != (info->flags & ASYNC_SPD_MASK)) {
2878 mxser_change_speed(info, 0);
2879 }
2880 } else {
2881 retval = mxser_startup(info);
2882 }
2883 return (retval);
2884 }
2886 /*
2887 * mxser_get_lsr_info - get line status register info
2888 *
2889 * Purpose: Let user call ioctl() to get info when the UART physically
2890 * is emptied. On bus types like RS485, the transmitter must
2891 * release the bus after transmitting. This must be done when
2892 * the transmit shift register is empty, not be done when the
2893 * transmit holding register is empty. This functionality
2894 * allows an RS485 driver to be written in user space.
2895 */
2896 static int mxser_get_lsr_info(struct mxser_struct *info, unsigned int *value)
2897 {
2898 unsigned char status;
2899 unsigned int result;
2900 unsigned long flags;
2902 spin_lock_irqsave(&info->slock, flags);
2903 status = inb(info->base + UART_LSR);
2904 spin_unlock_irqrestore(&info->slock, flags);
2905 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
2906 return put_user(result, value);
2907 }
2909 /*
2910 * This routine sends a break character out the serial port.
2911 */
2912 static void mxser_send_break(struct mxser_struct *info, int duration)
2913 {
2914 unsigned long flags;
2916 if (!info->base)
2917 return;
2918 set_current_state(TASK_INTERRUPTIBLE);
2919 spin_lock_irqsave(&info->slock, flags);
2920 outb(inb(info->base + UART_LCR) | UART_LCR_SBC, info->base + UART_LCR);
2921 spin_unlock_irqrestore(&info->slock, flags);
2922 schedule_timeout(duration);
2923 spin_lock_irqsave(&info->slock, flags);
2924 outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC, info->base + UART_LCR);
2925 spin_unlock_irqrestore(&info->slock, flags);
2926 }
2928 static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
2929 {
2930 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
2931 unsigned char control, status;
2932 unsigned long flags;
2935 if (tty->index == MXSER_PORTS)
2936 return (-ENOIOCTLCMD);
2937 if (tty->flags & (1 << TTY_IO_ERROR))
2938 return (-EIO);
2940 control = info->MCR;
2942 spin_lock_irqsave(&info->slock, flags);
2943 status = inb(info->base + UART_MSR);
2944 if (status & UART_MSR_ANY_DELTA)
2945 mxser_check_modem_status(info, status);
2946 spin_unlock_irqrestore(&info->slock, flags);
2947 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
2948 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) | ((status & UART_MSR_RI) ? TIOCM_RNG : 0) | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
2949 }
2951 static int mxser_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear)
2952 {
2953 struct mxser_struct *info = (struct mxser_struct *) tty->driver_data;
2954 unsigned long flags;
2957 if (tty->index == MXSER_PORTS)
2958 return -ENOIOCTLCMD;
2959 if (tty->flags & (1 << TTY_IO_ERROR))
2960 return -EIO;
2962 spin_lock_irqsave(&info->slock, flags);
2964 if (set & TIOCM_RTS)
2965 info->MCR |= UART_MCR_RTS;
2966 if (set & TIOCM_DTR)
2967 info->MCR |= UART_MCR_DTR;
2969 if (clear & TIOCM_RTS)
2970 info->MCR &= ~UART_MCR_RTS;
2971 if (clear & TIOCM_DTR)
2972 info->MCR &= ~UART_MCR_DTR;
2974 outb(info->MCR, info->base + UART_MCR);
2975 spin_unlock_irqrestore(&info->slock, flags);
2976 return 0;
2977 }
2980 static int mxser_read_register(int, unsigned short *);
2981 static int mxser_program_mode(int);
2982 static void mxser_normal_mode(int);
2984 static int mxser_get_ISA_conf(int cap, struct mxser_hwconf *hwconf)
2985 {
2986 int id, i, bits;
2987 unsigned short regs[16], irq;
2988 unsigned char scratch, scratch2;
2990 hwconf->IsMoxaMustChipFlag = MOXA_OTHER_UART;
2992 id = mxser_read_register(cap, regs);
2993 if (id == C168_ASIC_ID) {
2994 hwconf->board_type = MXSER_BOARD_C168_ISA;
2995 hwconf->ports = 8;
2996 } else if (id == C104_ASIC_ID) {
2997 hwconf->board_type = MXSER_BOARD_C104_ISA;
2998 hwconf->ports = 4;
2999 } else if (id == C102_ASIC_ID) {
3000 hwconf->board_type = MXSER_BOARD_C102_ISA;
3001 hwconf->ports = 2;
3002 } else if (id == CI132_ASIC_ID) {
3003 hwconf->board_type = MXSER_BOARD_CI132;
3004 hwconf->ports = 2;
3005 } else if (id == CI134_ASIC_ID) {
3006 hwconf->board_type = MXSER_BOARD_CI134;
3007 hwconf->ports = 4;
3008 } else if (id == CI104J_ASIC_ID) {
3009 hwconf->board_type = MXSER_BOARD_CI104J;
3010 hwconf->ports = 4;
3011 } else
3012 return (0);
3014 irq = 0;
3015 if (hwconf->ports == 2) {
3016 irq = regs[9] & 0xF000;
3017 irq = irq | (irq >> 4);
3018 if (irq != (regs[9] & 0xFF00))
3019 return (MXSER_ERR_IRQ_CONFLIT);
3020 } else if (hwconf->ports == 4) {
3021 irq = regs[9] & 0xF000;
3022 irq = irq | (irq >> 4);
3023 irq = irq | (irq >> 8);
3024 if (irq != regs[9])
3025 return (MXSER_ERR_IRQ_CONFLIT);
3026 } else if (hwconf->ports == 8) {
3027 irq = regs[9] & 0xF000;
3028 irq = irq | (irq >> 4);
3029 irq = irq | (irq >> 8);
3030 if ((irq != regs[9]) || (irq != regs[10]))
3031 return (MXSER_ERR_IRQ_CONFLIT);
3032 }
3034 if (!irq) {
3035 return (MXSER_ERR_IRQ);
3036 }
3037 hwconf->irq = ((int) (irq & 0xF000) >> 12);
3038 for (i = 0; i < 8; i++)
3039 hwconf->ioaddr[i] = (int) regs[i + 1] & 0xFFF8;
3040 if ((regs[12] & 0x80) == 0) {
3041 return (MXSER_ERR_VECTOR);
3042 }
3043 hwconf->vector = (int) regs[11]; /* interrupt vector */
3044 if (id == 1)
3045 hwconf->vector_mask = 0x00FF;
3046 else
3047 hwconf->vector_mask = 0x000F;
3048 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
3049 if (regs[12] & bits) {
3050 hwconf->baud_base[i] = 921600;
3051 hwconf->MaxCanSetBaudRate[i] = 921600; // add by Victor Yu. 09-04-2002
3052 } else {
3053 hwconf->baud_base[i] = 115200;
3054 hwconf->MaxCanSetBaudRate[i] = 115200; // add by Victor Yu. 09-04-2002
3055 }
3056 }
3057 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
3058 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
3059 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
3060 outb(scratch2, cap + UART_LCR);
3061 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
3062 scratch = inb(cap + UART_IIR);
3064 if (scratch & 0xC0)
3065 hwconf->uart_type = PORT_16550A;
3066 else
3067 hwconf->uart_type = PORT_16450;
3068 if (id == 1)
3069 hwconf->ports = 8;
3070 else
3071 hwconf->ports = 4;
3072 request_region(hwconf->ioaddr[0], 8 * hwconf->ports, "mxser(IO)");
3073 request_region(hwconf->vector, 1, "mxser(vector)");
3074 return (hwconf->ports);
3075 }
3077 #define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
3078 #define CHIP_DO 0x02 /* Serial Data Output in Eprom */
3079 #define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
3080 #define CHIP_DI 0x08 /* Serial Data Input in Eprom */
3081 #define EN_CCMD 0x000 /* Chip's command register */
3082 #define EN0_RSARLO 0x008 /* Remote start address reg 0 */
3083 #define EN0_RSARHI 0x009 /* Remote start address reg 1 */
3084 #define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
3085 #define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
3086 #define EN0_DCFG 0x00E /* Data configuration reg WR */
3087 #define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
3088 #define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
3089 #define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
3090 static int mxser_read_register(int port, unsigned short *regs)
3091 {
3092 int i, k, value, id;
3093 unsigned int j;
3095 id = mxser_program_mode(port);
3096 if (id < 0)
3097 return (id);
3098 for (i = 0; i < 14; i++) {
3099 k = (i & 0x3F) | 0x180;
3100 for (j = 0x100; j > 0; j >>= 1) {
3101 outb(CHIP_CS, port);
3102 if (k & j) {
3103 outb(CHIP_CS | CHIP_DO, port);
3104 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
3105 } else {
3106 outb(CHIP_CS, port);
3107 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
3108 }
3109 }
3110 (void) inb(port);
3111 value = 0;
3112 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
3113 outb(CHIP_CS, port);
3114 outb(CHIP_CS | CHIP_SK, port);
3115 if (inb(port) & CHIP_DI)
3116 value |= j;
3117 }
3118 regs[i] = value;
3119 outb(0, port);
3120 }
3121 mxser_normal_mode(port);
3122 return (id);
3123 }
3125 static int mxser_program_mode(int port)
3126 {
3127 int id, i, j, n;
3128 //unsigned long flags;
3130 spin_lock(&gm_lock);
3131 outb(0, port);
3132 outb(0, port);
3133 outb(0, port);
3134 (void) inb(port);
3135 (void) inb(port);
3136 outb(0, port);
3137 (void) inb(port);
3138 //restore_flags(flags);
3139 spin_unlock(&gm_lock);
3141 id = inb(port + 1) & 0x1F;
3142 if ((id != C168_ASIC_ID) && (id != C104_ASIC_ID) && (id != C102_ASIC_ID) && (id != CI132_ASIC_ID) && (id != CI134_ASIC_ID) && (id != CI104J_ASIC_ID))
3143 return (-1);
3144 for (i = 0, j = 0; i < 4; i++) {
3145 n = inb(port + 2);
3146 if (n == 'M') {
3147 j = 1;
3148 } else if ((j == 1) && (n == 1)) {
3149 j = 2;
3150 break;
3151 } else
3152 j = 0;
3153 }
3154 if (j != 2)
3155 id = -2;
3156 return (id);
3157 }
3159 static void mxser_normal_mode(int port)
3160 {
3161 int i, n;
3163 outb(0xA5, port + 1);
3164 outb(0x80, port + 3);
3165 outb(12, port + 0); /* 9600 bps */
3166 outb(0, port + 1);
3167 outb(0x03, port + 3); /* 8 data bits */
3168 outb(0x13, port + 4); /* loop back mode */
3169 for (i = 0; i < 16; i++) {
3170 n = inb(port + 5);
3171 if ((n & 0x61) == 0x60)
3172 break;
3173 if ((n & 1) == 1)
3174 (void) inb(port);
3175 }
3176 outb(0x00, port + 4);
3177 }
3179 // added by James 03-05-2004.
3180 // for secure device server:
3181 // stat = 1, the port8 DTR is set to ON.
3182 // stat = 0, the port8 DTR is set to OFF.
3183 void SDS_PORT8_DTR(int stat)
3184 {
3185 int _sds_oldmcr;
3186 _sds_oldmcr = inb(mxvar_table[7].base + UART_MCR); // get old MCR
3187 if (stat == 1) {
3188 outb(_sds_oldmcr | 0x01, mxvar_table[7].base + UART_MCR); // set DTR ON
3189 }
3190 if (stat == 0) {
3191 outb(_sds_oldmcr & 0xfe, mxvar_table[7].base + UART_MCR); // set DTR OFF
3192 }
3193 return;
3194 }
3196 module_init(mxser_module_init);
3197 module_exit(mxser_module_exit);