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-rw-r--r--drivers/char/mxser_new.c3183
1 files changed, 3183 insertions, 0 deletions
diff --git a/drivers/char/mxser_new.c b/drivers/char/mxser_new.c
new file mode 100644
index 000000000000..a3aff0bd8e23
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+++ b/drivers/char/mxser_new.c
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1/*
2 * mxser.c -- MOXA Smartio/Industio family multiport serial driver.
3 *
4 * Copyright (C) 1999-2001 Moxa Technologies (support@moxa.com.tw).
5 *
6 * This code is loosely based on the Linux serial driver, written by
7 * Linus Torvalds, Theodore T'so and others.
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; either version 2 of the License, or
12 * (at your option) any later version.
13 *
14 * This program is distributed in the hope that it will be useful,
15 * but WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
17 * GNU General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with this program; if not, write to the Free Software
21 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 *
23 * Original release 10/26/00
24 *
25 * 02/06/01 Support MOXA Industio family boards.
26 * 02/06/01 Support TIOCGICOUNT.
27 * 02/06/01 Fix the problem for connecting to serial mouse.
28 * 02/06/01 Fix the problem for H/W flow control.
29 * 02/06/01 Fix the compling warning when CONFIG_PCI
30 * don't be defined.
31 *
32 * Fed through a cleanup, indent and remove of non 2.6 code by Alan Cox
33 * <alan@redhat.com>. The original 1.8 code is available on www.moxa.com.
34 * - Fixed x86_64 cleanness
35 * - Fixed sleep with spinlock held in mxser_send_break
36 */
37
38
39#include <linux/module.h>
40#include <linux/autoconf.h>
41#include <linux/errno.h>
42#include <linux/signal.h>
43#include <linux/sched.h>
44#include <linux/timer.h>
45#include <linux/interrupt.h>
46#include <linux/tty.h>
47#include <linux/tty_flip.h>
48#include <linux/serial.h>
49#include <linux/serial_reg.h>
50#include <linux/major.h>
51#include <linux/string.h>
52#include <linux/fcntl.h>
53#include <linux/ptrace.h>
54#include <linux/gfp.h>
55#include <linux/ioport.h>
56#include <linux/mm.h>
57#include <linux/smp_lock.h>
58#include <linux/delay.h>
59#include <linux/pci.h>
60
61#include <asm/system.h>
62#include <asm/io.h>
63#include <asm/irq.h>
64#include <asm/bitops.h>
65#include <asm/uaccess.h>
66
67#include "mxser.h"
68
69#define MXSER_VERSION "1.8"
70#define MXSERMAJOR 174
71#define MXSERCUMAJOR 175
72
73#define MXSER_EVENT_TXLOW 1
74#define MXSER_EVENT_HANGUP 2
75
76#define MXSER_BOARDS 4 /* Max. boards */
77#define MXSER_PORTS 32 /* Max. ports */
78#define MXSER_PORTS_PER_BOARD 8 /* Max. ports per board */
79#define MXSER_ISR_PASS_LIMIT 256
80
81#define MXSER_ERR_IOADDR -1
82#define MXSER_ERR_IRQ -2
83#define MXSER_ERR_IRQ_CONFLIT -3
84#define MXSER_ERR_VECTOR -4
85
86#define SERIAL_TYPE_NORMAL 1
87#define SERIAL_TYPE_CALLOUT 2
88
89#define WAKEUP_CHARS 256
90
91#define UART_MCR_AFE 0x20
92#define UART_LSR_SPECIAL 0x1E
93
94#define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK|\
95 IXON|IXOFF))
96
97#define IRQ_T(info) ((info->flags & ASYNC_SHARE_IRQ) ? IRQF_SHARED : IRQF_DISABLED)
98
99#define C168_ASIC_ID 1
100#define C104_ASIC_ID 2
101#define C102_ASIC_ID 0xB
102#define CI132_ASIC_ID 4
103#define CI134_ASIC_ID 3
104#define CI104J_ASIC_ID 5
105
106enum {
107 MXSER_BOARD_C168_ISA = 1,
108 MXSER_BOARD_C104_ISA,
109 MXSER_BOARD_CI104J,
110 MXSER_BOARD_C168_PCI,
111 MXSER_BOARD_C104_PCI,
112 MXSER_BOARD_C102_ISA,
113 MXSER_BOARD_CI132,
114 MXSER_BOARD_CI134,
115 MXSER_BOARD_CP132,
116 MXSER_BOARD_CP114,
117 MXSER_BOARD_CT114,
118 MXSER_BOARD_CP102,
119 MXSER_BOARD_CP104U,
120 MXSER_BOARD_CP168U,
121 MXSER_BOARD_CP132U,
122 MXSER_BOARD_CP134U,
123 MXSER_BOARD_CP104JU,
124 MXSER_BOARD_RC7000,
125 MXSER_BOARD_CP118U,
126 MXSER_BOARD_CP102UL,
127 MXSER_BOARD_CP102U,
128};
129
130static char *mxser_brdname[] = {
131 "C168 series",
132 "C104 series",
133 "CI-104J series",
134 "C168H/PCI series",
135 "C104H/PCI series",
136 "C102 series",
137 "CI-132 series",
138 "CI-134 series",
139 "CP-132 series",
140 "CP-114 series",
141 "CT-114 series",
142 "CP-102 series",
143 "CP-104U series",
144 "CP-168U series",
145 "CP-132U series",
146 "CP-134U series",
147 "CP-104JU series",
148 "Moxa UC7000 Serial",
149 "CP-118U series",
150 "CP-102UL series",
151 "CP-102U series",
152};
153
154static int mxser_numports[] = {
155 8, /* C168-ISA */
156 4, /* C104-ISA */
157 4, /* CI104J */
158 8, /* C168-PCI */
159 4, /* C104-PCI */
160 2, /* C102-ISA */
161 2, /* CI132 */
162 4, /* CI134 */
163 2, /* CP132 */
164 4, /* CP114 */
165 4, /* CT114 */
166 2, /* CP102 */
167 4, /* CP104U */
168 8, /* CP168U */
169 2, /* CP132U */
170 4, /* CP134U */
171 4, /* CP104JU */
172 8, /* RC7000 */
173 8, /* CP118U */
174 2, /* CP102UL */
175 2, /* CP102U */
176};
177
178#define UART_TYPE_NUM 2
179
180static const unsigned int Gmoxa_uart_id[UART_TYPE_NUM] = {
181 MOXA_MUST_MU150_HWID,
182 MOXA_MUST_MU860_HWID
183};
184
185/* This is only for PCI */
186#define UART_INFO_NUM 3
187struct mxpciuart_info {
188 int type;
189 int tx_fifo;
190 int rx_fifo;
191 int xmit_fifo_size;
192 int rx_high_water;
193 int rx_trigger;
194 int rx_low_water;
195 long max_baud;
196};
197
198static const struct mxpciuart_info Gpci_uart_info[UART_INFO_NUM] = {
199 {MOXA_OTHER_UART, 16, 16, 16, 14, 14, 1, 921600L},
200 {MOXA_MUST_MU150_HWID, 64, 64, 64, 48, 48, 16, 230400L},
201 {MOXA_MUST_MU860_HWID, 128, 128, 128, 96, 96, 32, 921600L}
202};
203
204
205#ifdef CONFIG_PCI
206
207static struct pci_device_id mxser_pcibrds[] = {
208 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C168, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C168_PCI},
209 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_C104, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_C104_PCI},
210 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132},
211 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP114},
212 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CT114, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CT114},
213 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102},
214 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104U},
215 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP168U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP168U},
216 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP132U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP132U},
217 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP134U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP134U},
218 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP104JU, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP104JU},
219 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_RC7000, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_RC7000},
220 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP118U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP118U},
221 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102UL, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102UL},
222 {PCI_VENDOR_ID_MOXA, PCI_DEVICE_ID_MOXA_CP102U, PCI_ANY_ID, PCI_ANY_ID, 0, 0, MXSER_BOARD_CP102U},
223 {0}
224};
225
226MODULE_DEVICE_TABLE(pci, mxser_pcibrds);
227
228
229#endif
230
231typedef struct _moxa_pci_info {
232 unsigned short busNum;
233 unsigned short devNum;
234 struct pci_dev *pdev; /* add by Victor Yu. 06-23-2003 */
235} moxa_pci_info;
236
237static int ioaddr[MXSER_BOARDS] = { 0, 0, 0, 0 };
238static int ttymajor = MXSERMAJOR;
239static int calloutmajor = MXSERCUMAJOR;
240static int verbose = 0;
241
242/* Variables for insmod */
243
244MODULE_AUTHOR("Casper Yang");
245MODULE_DESCRIPTION("MOXA Smartio/Industio Family Multiport Board Device Driver");
246module_param_array(ioaddr, int, NULL, 0);
247module_param(ttymajor, int, 0);
248module_param(calloutmajor, int, 0);
249module_param(verbose, bool, 0);
250MODULE_LICENSE("GPL");
251
252struct mxser_log {
253 int tick;
254 unsigned long rxcnt[MXSER_PORTS];
255 unsigned long txcnt[MXSER_PORTS];
256};
257
258
259struct mxser_mon {
260 unsigned long rxcnt;
261 unsigned long txcnt;
262 unsigned long up_rxcnt;
263 unsigned long up_txcnt;
264 int modem_status;
265 unsigned char hold_reason;
266};
267
268struct mxser_mon_ext {
269 unsigned long rx_cnt[32];
270 unsigned long tx_cnt[32];
271 unsigned long up_rxcnt[32];
272 unsigned long up_txcnt[32];
273 int modem_status[32];
274
275 long baudrate[32];
276 int databits[32];
277 int stopbits[32];
278 int parity[32];
279 int flowctrl[32];
280 int fifo[32];
281 int iftype[32];
282};
283
284struct mxser_hwconf {
285 int board_type;
286 int ports;
287 int irq;
288 int vector;
289 int vector_mask;
290 int uart_type;
291 int ioaddr[MXSER_PORTS_PER_BOARD];
292 int baud_base[MXSER_PORTS_PER_BOARD];
293 moxa_pci_info pciInfo;
294 int IsMoxaMustChipFlag; /* add by Victor Yu. 08-30-2002 */
295 int MaxCanSetBaudRate[MXSER_PORTS_PER_BOARD]; /* add by Victor Yu. 09-04-2002 */
296 int opmode_ioaddr[MXSER_PORTS_PER_BOARD]; /* add by Victor Yu. 01-05-2004 */
297};
298
299struct mxser_struct {
300 int port;
301 int base; /* port base address */
302 int irq; /* port using irq no. */
303 int vector; /* port irq vector */
304 int vectormask; /* port vector mask */
305 int rx_high_water;
306 int rx_trigger; /* Rx fifo trigger level */
307 int rx_low_water;
308 int baud_base; /* max. speed */
309 int flags; /* defined in tty.h */
310 int type; /* UART type */
311 struct tty_struct *tty;
312 int read_status_mask;
313 int ignore_status_mask;
314 int xmit_fifo_size;
315 int custom_divisor;
316 int x_char; /* xon/xoff character */
317 int close_delay;
318 unsigned short closing_wait;
319 int IER; /* Interrupt Enable Register */
320 int MCR; /* Modem control register */
321 unsigned long event;
322 int count; /* # of fd on device */
323 int blocked_open; /* # of blocked opens */
324 long session; /* Session of opening process */
325 long pgrp; /* pgrp of opening process */
326 unsigned char *xmit_buf;
327 int xmit_head;
328 int xmit_tail;
329 int xmit_cnt;
330 struct work_struct tqueue;
331 struct termios normal_termios;
332 struct termios callout_termios;
333 wait_queue_head_t open_wait;
334 wait_queue_head_t close_wait;
335 wait_queue_head_t delta_msr_wait;
336 struct async_icount icount; /* kernel counters for the 4 input interrupts */
337 int timeout;
338 int IsMoxaMustChipFlag; /* add by Victor Yu. 08-30-2002 */
339 int MaxCanSetBaudRate; /* add by Victor Yu. 09-04-2002 */
340 int opmode_ioaddr; /* add by Victor Yu. 01-05-2004 */
341 unsigned char stop_rx;
342 unsigned char ldisc_stop_rx;
343 long realbaud;
344 struct mxser_mon mon_data;
345 unsigned char err_shadow;
346 spinlock_t slock;
347};
348
349struct mxser_mstatus {
350 tcflag_t cflag;
351 int cts;
352 int dsr;
353 int ri;
354 int dcd;
355};
356
357static struct mxser_mstatus GMStatus[MXSER_PORTS];
358
359static int mxserBoardCAP[MXSER_BOARDS] = {
360 0, 0, 0, 0
361 /* 0x180, 0x280, 0x200, 0x320 */
362};
363
364static struct tty_driver *mxvar_sdriver;
365static struct mxser_struct mxvar_table[MXSER_PORTS];
366static struct tty_struct *mxvar_tty[MXSER_PORTS + 1];
367static struct termios *mxvar_termios[MXSER_PORTS + 1];
368static struct termios *mxvar_termios_locked[MXSER_PORTS + 1];
369static struct mxser_log mxvar_log;
370static int mxvar_diagflag;
371static unsigned char mxser_msr[MXSER_PORTS + 1];
372static struct mxser_mon_ext mon_data_ext;
373static int mxser_set_baud_method[MXSER_PORTS + 1];
374static spinlock_t gm_lock;
375
376/*
377 * This is used to figure out the divisor speeds and the timeouts
378 */
379
380static struct mxser_hwconf mxsercfg[MXSER_BOARDS];
381
382/*
383 * static functions:
384 */
385
386static void mxser_getcfg(int board, struct mxser_hwconf *hwconf);
387static int mxser_init(void);
388
389/* static void mxser_poll(unsigned long); */
390static int mxser_get_ISA_conf(int, struct mxser_hwconf *);
391static int mxser_get_PCI_conf(int, int, int, struct mxser_hwconf *);
392static void mxser_do_softint(void *);
393static int mxser_open(struct tty_struct *, struct file *);
394static void mxser_close(struct tty_struct *, struct file *);
395static int mxser_write(struct tty_struct *, const unsigned char *, int);
396static int mxser_write_room(struct tty_struct *);
397static void mxser_flush_buffer(struct tty_struct *);
398static int mxser_chars_in_buffer(struct tty_struct *);
399static void mxser_flush_chars(struct tty_struct *);
400static void mxser_put_char(struct tty_struct *, unsigned char);
401static int mxser_ioctl(struct tty_struct *, struct file *, uint, ulong);
402static int mxser_ioctl_special(unsigned int, void __user *);
403static void mxser_throttle(struct tty_struct *);
404static void mxser_unthrottle(struct tty_struct *);
405static void mxser_set_termios(struct tty_struct *, struct termios *);
406static void mxser_stop(struct tty_struct *);
407static void mxser_start(struct tty_struct *);
408static void mxser_hangup(struct tty_struct *);
409static void mxser_rs_break(struct tty_struct *, int);
410static irqreturn_t mxser_interrupt(int, void *, struct pt_regs *);
411static void mxser_receive_chars(struct mxser_struct *, int *);
412static void mxser_transmit_chars(struct mxser_struct *);
413static void mxser_check_modem_status(struct mxser_struct *, int);
414static int mxser_block_til_ready(struct tty_struct *, struct file *, struct mxser_struct *);
415static int mxser_startup(struct mxser_struct *);
416static void mxser_shutdown(struct mxser_struct *);
417static int mxser_change_speed(struct mxser_struct *, struct termios *old_termios);
418static int mxser_get_serial_info(struct mxser_struct *, struct serial_struct __user *);
419static int mxser_set_serial_info(struct mxser_struct *, struct serial_struct __user *);
420static int mxser_get_lsr_info(struct mxser_struct *, unsigned int __user *);
421static void mxser_send_break(struct mxser_struct *, int);
422static int mxser_tiocmget(struct tty_struct *, struct file *);
423static int mxser_tiocmset(struct tty_struct *, struct file *, unsigned int, unsigned int);
424static int mxser_set_baud(struct mxser_struct *info, long newspd);
425static void mxser_wait_until_sent(struct tty_struct *tty, int timeout);
426
427static void mxser_startrx(struct tty_struct *tty);
428static void mxser_stoprx(struct tty_struct *tty);
429
430
431static int CheckIsMoxaMust(int io)
432{
433 u8 oldmcr, hwid;
434 int i;
435
436 outb(0, io + UART_LCR);
437 DISABLE_MOXA_MUST_ENCHANCE_MODE(io);
438 oldmcr = inb(io + UART_MCR);
439 outb(0, io + UART_MCR);
440 SET_MOXA_MUST_XON1_VALUE(io, 0x11);
441 if ((hwid = inb(io + UART_MCR)) != 0) {
442 outb(oldmcr, io + UART_MCR);
443 return MOXA_OTHER_UART;
444 }
445
446 GET_MOXA_MUST_HARDWARE_ID(io, &hwid);
447 for (i = 0; i < UART_TYPE_NUM; i++) {
448 if (hwid == Gmoxa_uart_id[i])
449 return (int)hwid;
450 }
451 return MOXA_OTHER_UART;
452}
453
454/* above is modified by Victor Yu. 08-15-2002 */
455
456static const struct tty_operations mxser_ops = {
457 .open = mxser_open,
458 .close = mxser_close,
459 .write = mxser_write,
460 .put_char = mxser_put_char,
461 .flush_chars = mxser_flush_chars,
462 .write_room = mxser_write_room,
463 .chars_in_buffer = mxser_chars_in_buffer,
464 .flush_buffer = mxser_flush_buffer,
465 .ioctl = mxser_ioctl,
466 .throttle = mxser_throttle,
467 .unthrottle = mxser_unthrottle,
468 .set_termios = mxser_set_termios,
469 .stop = mxser_stop,
470 .start = mxser_start,
471 .hangup = mxser_hangup,
472 .break_ctl = mxser_rs_break,
473 .wait_until_sent = mxser_wait_until_sent,
474 .tiocmget = mxser_tiocmget,
475 .tiocmset = mxser_tiocmset,
476};
477
478/*
479 * The MOXA Smartio/Industio serial driver boot-time initialization code!
480 */
481
482static int __init mxser_module_init(void)
483{
484 int ret;
485
486 if (verbose)
487 printk(KERN_DEBUG "Loading module mxser ...\n");
488 ret = mxser_init();
489 if (verbose)
490 printk(KERN_DEBUG "Done.\n");
491 return ret;
492}
493
494static void __exit mxser_module_exit(void)
495{
496 int i, err;
497
498 if (verbose)
499 printk(KERN_DEBUG "Unloading module mxser ...\n");
500
501 err = tty_unregister_driver(mxvar_sdriver);
502 if (!err)
503 put_tty_driver(mxvar_sdriver);
504 else
505 printk(KERN_ERR "Couldn't unregister MOXA Smartio/Industio family serial driver\n");
506
507 for (i = 0; i < MXSER_BOARDS; i++) {
508 struct pci_dev *pdev;
509
510 if (mxsercfg[i].board_type == -1)
511 continue;
512 else {
513 pdev = mxsercfg[i].pciInfo.pdev;
514 free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
515 if (pdev != NULL) { /* PCI */
516 release_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2));
517 release_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3));
518 pci_dev_put(pdev);
519 } else {
520 release_region(mxsercfg[i].ioaddr[0], 8 * mxsercfg[i].ports);
521 release_region(mxsercfg[i].vector, 1);
522 }
523 }
524 }
525 if (verbose)
526 printk(KERN_DEBUG "Done.\n");
527}
528
529static void process_txrx_fifo(struct mxser_struct *info)
530{
531 int i;
532
533 if ((info->type == PORT_16450) || (info->type == PORT_8250)) {
534 info->rx_trigger = 1;
535 info->rx_high_water = 1;
536 info->rx_low_water = 1;
537 info->xmit_fifo_size = 1;
538 } else {
539 for (i = 0; i < UART_INFO_NUM; i++) {
540 if (info->IsMoxaMustChipFlag == Gpci_uart_info[i].type) {
541 info->rx_trigger = Gpci_uart_info[i].rx_trigger;
542 info->rx_low_water = Gpci_uart_info[i].rx_low_water;
543 info->rx_high_water = Gpci_uart_info[i].rx_high_water;
544 info->xmit_fifo_size = Gpci_uart_info[i].xmit_fifo_size;
545 break;
546 }
547 }
548 }
549}
550
551static int mxser_initbrd(int board, struct mxser_hwconf *hwconf)
552{
553 struct mxser_struct *info;
554 int retval;
555 int i, n;
556
557 n = board * MXSER_PORTS_PER_BOARD;
558 info = &mxvar_table[n];
559 /*if (verbose) */ {
560 printk(KERN_DEBUG " ttyM%d - ttyM%d ",
561 n, n + hwconf->ports - 1);
562 printk(" max. baud rate = %d bps.\n",
563 hwconf->MaxCanSetBaudRate[0]);
564 }
565
566 for (i = 0; i < hwconf->ports; i++, n++, info++) {
567 info->port = n;
568 info->base = hwconf->ioaddr[i];
569 info->irq = hwconf->irq;
570 info->vector = hwconf->vector;
571 info->vectormask = hwconf->vector_mask;
572 info->opmode_ioaddr = hwconf->opmode_ioaddr[i]; /* add by Victor Yu. 01-05-2004 */
573 info->stop_rx = 0;
574 info->ldisc_stop_rx = 0;
575
576 info->IsMoxaMustChipFlag = hwconf->IsMoxaMustChipFlag;
577 /* Enhance mode enabled here */
578 if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
579 ENABLE_MOXA_MUST_ENCHANCE_MODE(info->base);
580 }
581
582 info->flags = ASYNC_SHARE_IRQ;
583 info->type = hwconf->uart_type;
584 info->baud_base = hwconf->baud_base[i];
585
586 info->MaxCanSetBaudRate = hwconf->MaxCanSetBaudRate[i];
587
588 process_txrx_fifo(info);
589
590
591 info->custom_divisor = hwconf->baud_base[i] * 16;
592 info->close_delay = 5 * HZ / 10;
593 info->closing_wait = 30 * HZ;
594 INIT_WORK(&info->tqueue, mxser_do_softint, info);
595 info->normal_termios = mxvar_sdriver->init_termios;
596 init_waitqueue_head(&info->open_wait);
597 init_waitqueue_head(&info->close_wait);
598 init_waitqueue_head(&info->delta_msr_wait);
599 memset(&info->mon_data, 0, sizeof(struct mxser_mon));
600 info->err_shadow = 0;
601 spin_lock_init(&info->slock);
602 }
603 /*
604 * Allocate the IRQ if necessary
605 */
606
607
608 /* before set INT ISR, disable all int */
609 for (i = 0; i < hwconf->ports; i++) {
610 outb(inb(hwconf->ioaddr[i] + UART_IER) & 0xf0,
611 hwconf->ioaddr[i] + UART_IER);
612 }
613
614 n = board * MXSER_PORTS_PER_BOARD;
615 info = &mxvar_table[n];
616
617 retval = request_irq(hwconf->irq, mxser_interrupt, IRQ_T(info),
618 "mxser", info);
619 if (retval) {
620 printk(KERN_ERR "Board %d: %s",
621 board, mxser_brdname[hwconf->board_type - 1]);
622 printk(" Request irq failed, IRQ (%d) may conflict with"
623 " another device.\n", info->irq);
624 return retval;
625 }
626 return 0;
627}
628
629static void mxser_getcfg(int board, struct mxser_hwconf *hwconf)
630{
631 mxsercfg[board] = *hwconf;
632}
633
634#ifdef CONFIG_PCI
635static int mxser_get_PCI_conf(int busnum, int devnum, int board_type, struct mxser_hwconf *hwconf)
636{
637 int i, j;
638 /* unsigned int val; */
639 unsigned int ioaddress;
640 struct pci_dev *pdev = hwconf->pciInfo.pdev;
641
642 /* io address */
643 hwconf->board_type = board_type;
644 hwconf->ports = mxser_numports[board_type - 1];
645 ioaddress = pci_resource_start(pdev, 2);
646 request_region(pci_resource_start(pdev, 2), pci_resource_len(pdev, 2),
647 "mxser(IO)");
648
649 for (i = 0; i < hwconf->ports; i++)
650 hwconf->ioaddr[i] = ioaddress + 8 * i;
651
652 /* vector */
653 ioaddress = pci_resource_start(pdev, 3);
654 request_region(pci_resource_start(pdev, 3), pci_resource_len(pdev, 3),
655 "mxser(vector)");
656 hwconf->vector = ioaddress;
657
658 /* irq */
659 hwconf->irq = hwconf->pciInfo.pdev->irq;
660
661 hwconf->IsMoxaMustChipFlag = CheckIsMoxaMust(hwconf->ioaddr[0]);
662 hwconf->uart_type = PORT_16550A;
663 hwconf->vector_mask = 0;
664
665
666 for (i = 0; i < hwconf->ports; i++) {
667 for (j = 0; j < UART_INFO_NUM; j++) {
668 if (Gpci_uart_info[j].type == hwconf->IsMoxaMustChipFlag) {
669 hwconf->MaxCanSetBaudRate[i] = Gpci_uart_info[j].max_baud;
670
671 /* exception....CP-102 */
672 if (board_type == MXSER_BOARD_CP102)
673 hwconf->MaxCanSetBaudRate[i] = 921600;
674 break;
675 }
676 }
677 }
678
679 if (hwconf->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID) {
680 for (i = 0; i < hwconf->ports; i++) {
681 if (i < 4)
682 hwconf->opmode_ioaddr[i] = ioaddress + 4;
683 else
684 hwconf->opmode_ioaddr[i] = ioaddress + 0x0c;
685 }
686 outb(0, ioaddress + 4); /* default set to RS232 mode */
687 outb(0, ioaddress + 0x0c); /* default set to RS232 mode */
688 }
689
690 for (i = 0; i < hwconf->ports; i++) {
691 hwconf->vector_mask |= (1 << i);
692 hwconf->baud_base[i] = 921600;
693 }
694 return 0;
695}
696#endif
697
698static int mxser_init(void)
699{
700 int i, m, retval, b, n;
701 struct pci_dev *pdev = NULL;
702 int index;
703 unsigned char busnum, devnum;
704 struct mxser_hwconf hwconf;
705
706 mxvar_sdriver = alloc_tty_driver(MXSER_PORTS + 1);
707 if (!mxvar_sdriver)
708 return -ENOMEM;
709 spin_lock_init(&gm_lock);
710
711 for (i = 0; i < MXSER_BOARDS; i++) {
712 mxsercfg[i].board_type = -1;
713 }
714
715 printk(KERN_INFO "MOXA Smartio/Industio family driver version %s\n",
716 MXSER_VERSION);
717
718 /* Initialize the tty_driver structure */
719 memset(mxvar_sdriver, 0, sizeof(struct tty_driver));
720 mxvar_sdriver->magic = TTY_DRIVER_MAGIC;
721 mxvar_sdriver->name = "ttyM";
722 mxvar_sdriver->major = ttymajor;
723 mxvar_sdriver->minor_start = 0;
724 mxvar_sdriver->num = MXSER_PORTS + 1;
725 mxvar_sdriver->type = TTY_DRIVER_TYPE_SERIAL;
726 mxvar_sdriver->subtype = SERIAL_TYPE_NORMAL;
727 mxvar_sdriver->init_termios = tty_std_termios;
728 mxvar_sdriver->init_termios.c_cflag = B9600|CS8|CREAD|HUPCL|CLOCAL;
729 mxvar_sdriver->flags = TTY_DRIVER_REAL_RAW;
730 tty_set_operations(mxvar_sdriver, &mxser_ops);
731 mxvar_sdriver->ttys = mxvar_tty;
732 mxvar_sdriver->termios = mxvar_termios;
733 mxvar_sdriver->termios_locked = mxvar_termios_locked;
734
735 mxvar_diagflag = 0;
736 memset(mxvar_table, 0, MXSER_PORTS * sizeof(struct mxser_struct));
737 memset(&mxvar_log, 0, sizeof(struct mxser_log));
738
739 memset(&mxser_msr, 0, sizeof(unsigned char) * (MXSER_PORTS + 1));
740 memset(&mon_data_ext, 0, sizeof(struct mxser_mon_ext));
741 memset(&mxser_set_baud_method, 0, sizeof(int) * (MXSER_PORTS + 1));
742 memset(&hwconf, 0, sizeof(struct mxser_hwconf));
743
744 m = 0;
745 /* Start finding ISA boards here */
746 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
747 int cap;
748
749 if (!(cap = mxserBoardCAP[b]))
750 continue;
751
752 retval = mxser_get_ISA_conf(cap, &hwconf);
753
754 if (retval != 0)
755 printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
756 mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
757
758 if (retval <= 0) {
759 if (retval == MXSER_ERR_IRQ)
760 printk(KERN_ERR "Invalid interrupt number, "
761 "board not configured\n");
762 else if (retval == MXSER_ERR_IRQ_CONFLIT)
763 printk(KERN_ERR "Invalid interrupt number, "
764 "board not configured\n");
765 else if (retval == MXSER_ERR_VECTOR)
766 printk(KERN_ERR "Invalid interrupt vector, "
767 "board not configured\n");
768 else if (retval == MXSER_ERR_IOADDR)
769 printk(KERN_ERR "Invalid I/O address, "
770 "board not configured\n");
771
772 continue;
773 }
774
775 hwconf.pciInfo.busNum = 0;
776 hwconf.pciInfo.devNum = 0;
777 hwconf.pciInfo.pdev = NULL;
778
779 mxser_getcfg(m, &hwconf);
780 /*
781 * init mxsercfg first,
782 * or mxsercfg data is not correct on ISR.
783 */
784 /* mxser_initbrd will hook ISR. */
785 if (mxser_initbrd(m, &hwconf) < 0)
786 continue;
787
788 m++;
789 }
790
791 /* Start finding ISA boards from module arg */
792 for (b = 0; b < MXSER_BOARDS && m < MXSER_BOARDS; b++) {
793 int cap;
794
795 if (!(cap = ioaddr[b]))
796 continue;
797
798 retval = mxser_get_ISA_conf(cap, &hwconf);
799
800 if (retval != 0)
801 printk(KERN_INFO "Found MOXA %s board (CAP=0x%x)\n",
802 mxser_brdname[hwconf.board_type - 1], ioaddr[b]);
803
804 if (retval <= 0) {
805 if (retval == MXSER_ERR_IRQ)
806 printk(KERN_ERR "Invalid interrupt number, "
807 "board not configured\n");
808 else if (retval == MXSER_ERR_IRQ_CONFLIT)
809 printk(KERN_ERR "Invalid interrupt number, "
810 "board not configured\n");
811 else if (retval == MXSER_ERR_VECTOR)
812 printk(KERN_ERR "Invalid interrupt vector, "
813 "board not configured\n");
814 else if (retval == MXSER_ERR_IOADDR)
815 printk(KERN_ERR "Invalid I/O address, "
816 "board not configured\n");
817
818 continue;
819 }
820
821 hwconf.pciInfo.busNum = 0;
822 hwconf.pciInfo.devNum = 0;
823 hwconf.pciInfo.pdev = NULL;
824
825 mxser_getcfg(m, &hwconf);
826 /*
827 * init mxsercfg first,
828 * or mxsercfg data is not correct on ISR.
829 */
830 /* mxser_initbrd will hook ISR. */
831 if (mxser_initbrd(m, &hwconf) < 0)
832 continue;
833
834 m++;
835 }
836
837 /* start finding PCI board here */
838#ifdef CONFIG_PCI
839 n = ARRAY_SIZE(mxser_pcibrds) - 1;
840 index = 0;
841 b = 0;
842 while (b < n) {
843 pdev = pci_get_device(mxser_pcibrds[b].vendor,
844 mxser_pcibrds[b].device, pdev);
845 if (pdev == NULL) {
846 b++;
847 continue;
848 }
849 hwconf.pciInfo.busNum = busnum = pdev->bus->number;
850 hwconf.pciInfo.devNum = devnum = PCI_SLOT(pdev->devfn) << 3;
851 hwconf.pciInfo.pdev = pdev;
852 printk(KERN_INFO "Found MOXA %s board(BusNo=%d,DevNo=%d)\n",
853 mxser_brdname[(int) (mxser_pcibrds[b].driver_data) - 1],
854 busnum, devnum >> 3);
855 index++;
856 if (m >= MXSER_BOARDS)
857 printk(KERN_ERR
858 "Too many Smartio/Industio family boards find "
859 "(maximum %d), board not configured\n",
860 MXSER_BOARDS);
861 else {
862 if (pci_enable_device(pdev)) {
863 printk(KERN_ERR "Moxa SmartI/O PCI enable "
864 "fail !\n");
865 continue;
866 }
867 retval = mxser_get_PCI_conf(busnum, devnum,
868 (int)mxser_pcibrds[b].driver_data,
869 &hwconf);
870 if (retval < 0) {
871 if (retval == MXSER_ERR_IRQ)
872 printk(KERN_ERR
873 "Invalid interrupt number, "
874 "board not configured\n");
875 else if (retval == MXSER_ERR_IRQ_CONFLIT)
876 printk(KERN_ERR
877 "Invalid interrupt number, "
878 "board not configured\n");
879 else if (retval == MXSER_ERR_VECTOR)
880 printk(KERN_ERR
881 "Invalid interrupt vector, "
882 "board not configured\n");
883 else if (retval == MXSER_ERR_IOADDR)
884 printk(KERN_ERR
885 "Invalid I/O address, "
886 "board not configured\n");
887 continue;
888 }
889 mxser_getcfg(m, &hwconf);
890 /* init mxsercfg first,
891 * or mxsercfg data is not correct on ISR.
892 */
893 /* mxser_initbrd will hook ISR. */
894 if (mxser_initbrd(m, &hwconf) < 0)
895 continue;
896 m++;
897 /* Keep an extra reference if we succeeded. It will
898 be returned at unload time */
899 pci_dev_get(pdev);
900 }
901 }
902#endif
903
904 retval = tty_register_driver(mxvar_sdriver);
905 if (retval) {
906 printk(KERN_ERR "Couldn't install MOXA Smartio/Industio family"
907 " driver !\n");
908 put_tty_driver(mxvar_sdriver);
909
910 for (i = 0; i < MXSER_BOARDS; i++) {
911 if (mxsercfg[i].board_type == -1)
912 continue;
913 else {
914 free_irq(mxsercfg[i].irq, &mxvar_table[i * MXSER_PORTS_PER_BOARD]);
915 /* todo: release io, vector */
916 }
917 }
918 return retval;
919 }
920
921 return 0;
922}
923
924static void mxser_do_softint(void *private_)
925{
926 struct mxser_struct *info = private_;
927 struct tty_struct *tty;
928
929 tty = info->tty;
930
931 if (tty) {
932 if (test_and_clear_bit(MXSER_EVENT_TXLOW, &info->event))
933 tty_wakeup(tty);
934 if (test_and_clear_bit(MXSER_EVENT_HANGUP, &info->event))
935 tty_hangup(tty);
936 }
937}
938
939static unsigned char mxser_get_msr(int baseaddr, int mode, int port, struct mxser_struct *info)
940{
941 unsigned char status = 0;
942
943 status = inb(baseaddr + UART_MSR);
944
945 mxser_msr[port] &= 0x0F;
946 mxser_msr[port] |= status;
947 status = mxser_msr[port];
948 if (mode)
949 mxser_msr[port] = 0;
950
951 return status;
952}
953
954/*
955 * This routine is called whenever a serial port is opened. It
956 * enables interrupts for a serial port, linking in its async structure into
957 * the IRQ chain. It also performs the serial-specific
958 * initialization for the tty structure.
959 */
960static int mxser_open(struct tty_struct *tty, struct file *filp)
961{
962 struct mxser_struct *info;
963 int retval, line;
964
965 /* initialize driver_data in case something fails */
966 tty->driver_data = NULL;
967
968 line = tty->index;
969 if (line == MXSER_PORTS)
970 return 0;
971 if (line < 0 || line > MXSER_PORTS)
972 return -ENODEV;
973 info = mxvar_table + line;
974 if (!info->base)
975 return -ENODEV;
976
977 tty->driver_data = info;
978 info->tty = tty;
979 /*
980 * Start up serial port
981 */
982 retval = mxser_startup(info);
983 if (retval)
984 return retval;
985
986 retval = mxser_block_til_ready(tty, filp, info);
987 if (retval)
988 return retval;
989
990 info->count++;
991
992 if ((info->count == 1) && (info->flags & ASYNC_SPLIT_TERMIOS)) {
993 if (tty->driver->subtype == SERIAL_TYPE_NORMAL)
994 *tty->termios = info->normal_termios;
995 else
996 *tty->termios = info->callout_termios;
997 mxser_change_speed(info, NULL);
998 }
999
1000 info->session = current->signal->session;
1001 info->pgrp = process_group(current);
1002
1003 /*
1004 status = mxser_get_msr(info->base, 0, info->port);
1005 mxser_check_modem_status(info, status);
1006 */
1007
1008/* unmark here for very high baud rate (ex. 921600 bps) used */
1009 tty->low_latency = 1;
1010 return 0;
1011}
1012
1013/*
1014 * This routine is called when the serial port gets closed. First, we
1015 * wait for the last remaining data to be sent. Then, we unlink its
1016 * async structure from the interrupt chain if necessary, and we free
1017 * that IRQ if nothing is left in the chain.
1018 */
1019static void mxser_close(struct tty_struct *tty, struct file *filp)
1020{
1021 struct mxser_struct *info = tty->driver_data;
1022
1023 unsigned long timeout;
1024 unsigned long flags;
1025 struct tty_ldisc *ld;
1026
1027 if (tty->index == MXSER_PORTS)
1028 return;
1029 if (!info)
1030 return;
1031
1032 spin_lock_irqsave(&info->slock, flags);
1033
1034 if (tty_hung_up_p(filp)) {
1035 spin_unlock_irqrestore(&info->slock, flags);
1036 return;
1037 }
1038 if ((tty->count == 1) && (info->count != 1)) {
1039 /*
1040 * Uh, oh. tty->count is 1, which means that the tty
1041 * structure will be freed. Info->count should always
1042 * be one in these conditions. If it's greater than
1043 * one, we've got real problems, since it means the
1044 * serial port won't be shutdown.
1045 */
1046 printk(KERN_ERR "mxser_close: bad serial port count; "
1047 "tty->count is 1, info->count is %d\n", info->count);
1048 info->count = 1;
1049 }
1050 if (--info->count < 0) {
1051 printk(KERN_ERR "mxser_close: bad serial port count for "
1052 "ttys%d: %d\n", info->port, info->count);
1053 info->count = 0;
1054 }
1055 if (info->count) {
1056 spin_unlock_irqrestore(&info->slock, flags);
1057 return;
1058 }
1059 info->flags |= ASYNC_CLOSING;
1060 spin_unlock_irqrestore(&info->slock, flags);
1061 /*
1062 * Save the termios structure, since this port may have
1063 * separate termios for callout and dialin.
1064 */
1065 if (info->flags & ASYNC_NORMAL_ACTIVE)
1066 info->normal_termios = *tty->termios;
1067 /*
1068 * Now we wait for the transmit buffer to clear; and we notify
1069 * the line discipline to only process XON/XOFF characters.
1070 */
1071 tty->closing = 1;
1072 if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
1073 tty_wait_until_sent(tty, info->closing_wait);
1074 /*
1075 * At this point we stop accepting input. To do this, we
1076 * disable the receive line status interrupts, and tell the
1077 * interrupt driver to stop checking the data ready bit in the
1078 * line status register.
1079 */
1080 info->IER &= ~UART_IER_RLSI;
1081 if (info->IsMoxaMustChipFlag)
1082 info->IER &= ~MOXA_MUST_RECV_ISR;
1083/* by William
1084 info->read_status_mask &= ~UART_LSR_DR;
1085*/
1086 if (info->flags & ASYNC_INITIALIZED) {
1087 outb(info->IER, info->base + UART_IER);
1088 /*
1089 * Before we drop DTR, make sure the UART transmitter
1090 * has completely drained; this is especially
1091 * important if there is a transmit FIFO!
1092 */
1093 timeout = jiffies + HZ;
1094 while (!(inb(info->base + UART_LSR) & UART_LSR_TEMT)) {
1095 schedule_timeout_interruptible(5);
1096 if (time_after(jiffies, timeout))
1097 break;
1098 }
1099 }
1100 mxser_shutdown(info);
1101
1102 if (tty->driver->flush_buffer)
1103 tty->driver->flush_buffer(tty);
1104
1105 ld = tty_ldisc_ref(tty);
1106 if (ld) {
1107 if (ld->flush_buffer)
1108 ld->flush_buffer(tty);
1109 tty_ldisc_deref(ld);
1110 }
1111
1112 tty->closing = 0;
1113 info->event = 0;
1114 info->tty = NULL;
1115 if (info->blocked_open) {
1116 if (info->close_delay)
1117 schedule_timeout_interruptible(info->close_delay);
1118 wake_up_interruptible(&info->open_wait);
1119 }
1120
1121 info->flags &= ~(ASYNC_NORMAL_ACTIVE | ASYNC_CLOSING);
1122 wake_up_interruptible(&info->close_wait);
1123
1124}
1125
1126static int mxser_write(struct tty_struct *tty, const unsigned char *buf, int count)
1127{
1128 int c, total = 0;
1129 struct mxser_struct *info = tty->driver_data;
1130 unsigned long flags;
1131
1132 if (!info->xmit_buf)
1133 return 0;
1134
1135 while (1) {
1136 c = min_t(int, count, min(SERIAL_XMIT_SIZE - info->xmit_cnt - 1,
1137 SERIAL_XMIT_SIZE - info->xmit_head));
1138 if (c <= 0)
1139 break;
1140
1141 memcpy(info->xmit_buf + info->xmit_head, buf, c);
1142 spin_lock_irqsave(&info->slock, flags);
1143 info->xmit_head = (info->xmit_head + c) &
1144 (SERIAL_XMIT_SIZE - 1);
1145 info->xmit_cnt += c;
1146 spin_unlock_irqrestore(&info->slock, flags);
1147
1148 buf += c;
1149 count -= c;
1150 total += c;
1151 }
1152
1153 if (info->xmit_cnt && !tty->stopped && !(info->IER & UART_IER_THRI)) {
1154 if (!tty->hw_stopped ||
1155 (info->type == PORT_16550A) ||
1156 (info->IsMoxaMustChipFlag)) {
1157 spin_lock_irqsave(&info->slock, flags);
1158 info->IER |= UART_IER_THRI;
1159 outb(info->IER, info->base + UART_IER);
1160 spin_unlock_irqrestore(&info->slock, flags);
1161 }
1162 }
1163 return total;
1164}
1165
1166static void mxser_put_char(struct tty_struct *tty, unsigned char ch)
1167{
1168 struct mxser_struct *info = tty->driver_data;
1169 unsigned long flags;
1170
1171 if (!info->xmit_buf)
1172 return;
1173
1174 if (info->xmit_cnt >= SERIAL_XMIT_SIZE - 1)
1175 return;
1176
1177 spin_lock_irqsave(&info->slock, flags);
1178 info->xmit_buf[info->xmit_head++] = ch;
1179 info->xmit_head &= SERIAL_XMIT_SIZE - 1;
1180 info->xmit_cnt++;
1181 spin_unlock_irqrestore(&info->slock, flags);
1182 if (!tty->stopped && !(info->IER & UART_IER_THRI)) {
1183 if (!tty->hw_stopped ||
1184 (info->type == PORT_16550A) ||
1185 info->IsMoxaMustChipFlag) {
1186 spin_lock_irqsave(&info->slock, flags);
1187 info->IER |= UART_IER_THRI;
1188 outb(info->IER, info->base + UART_IER);
1189 spin_unlock_irqrestore(&info->slock, flags);
1190 }
1191 }
1192}
1193
1194
1195static void mxser_flush_chars(struct tty_struct *tty)
1196{
1197 struct mxser_struct *info = tty->driver_data;
1198 unsigned long flags;
1199
1200 if (info->xmit_cnt <= 0 ||
1201 tty->stopped ||
1202 !info->xmit_buf ||
1203 (tty->hw_stopped &&
1204 (info->type != PORT_16550A) &&
1205 (!info->IsMoxaMustChipFlag)
1206 ))
1207 return;
1208
1209 spin_lock_irqsave(&info->slock, flags);
1210
1211 info->IER |= UART_IER_THRI;
1212 outb(info->IER, info->base + UART_IER);
1213
1214 spin_unlock_irqrestore(&info->slock, flags);
1215}
1216
1217static int mxser_write_room(struct tty_struct *tty)
1218{
1219 struct mxser_struct *info = tty->driver_data;
1220 int ret;
1221
1222 ret = SERIAL_XMIT_SIZE - info->xmit_cnt - 1;
1223 if (ret < 0)
1224 ret = 0;
1225 return ret;
1226}
1227
1228static int mxser_chars_in_buffer(struct tty_struct *tty)
1229{
1230 struct mxser_struct *info = tty->driver_data;
1231 return info->xmit_cnt;
1232}
1233
1234static void mxser_flush_buffer(struct tty_struct *tty)
1235{
1236 struct mxser_struct *info = tty->driver_data;
1237 char fcr;
1238 unsigned long flags;
1239
1240
1241 spin_lock_irqsave(&info->slock, flags);
1242 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
1243
1244 /* below added by shinhay */
1245 fcr = inb(info->base + UART_FCR);
1246 outb((fcr | UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
1247 info->base + UART_FCR);
1248 outb(fcr, info->base + UART_FCR);
1249
1250 spin_unlock_irqrestore(&info->slock, flags);
1251 /* above added by shinhay */
1252
1253 wake_up_interruptible(&tty->write_wait);
1254 if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) && tty->ldisc.write_wakeup)
1255 (tty->ldisc.write_wakeup) (tty);
1256}
1257
1258static int mxser_ioctl(struct tty_struct *tty, struct file *file, unsigned int cmd, unsigned long arg)
1259{
1260 struct mxser_struct *info = tty->driver_data;
1261 int retval;
1262 struct async_icount cprev, cnow; /* kernel counter temps */
1263 struct serial_icounter_struct __user *p_cuser;
1264 unsigned long templ;
1265 unsigned long flags;
1266 void __user *argp = (void __user *)arg;
1267
1268 if (tty->index == MXSER_PORTS)
1269 return mxser_ioctl_special(cmd, argp);
1270
1271 /* following add by Victor Yu. 01-05-2004 */
1272 if (cmd == MOXA_SET_OP_MODE || cmd == MOXA_GET_OP_MODE) {
1273 int opmode, p;
1274 static unsigned char ModeMask[] = { 0xfc, 0xf3, 0xcf, 0x3f };
1275 int shiftbit;
1276 unsigned char val, mask;
1277
1278 p = info->port % 4;
1279 if (cmd == MOXA_SET_OP_MODE) {
1280 if (get_user(opmode, (int __user *) argp))
1281 return -EFAULT;
1282 if (opmode != RS232_MODE &&
1283 opmode != RS485_2WIRE_MODE &&
1284 opmode != RS422_MODE &&
1285 opmode != RS485_4WIRE_MODE)
1286 return -EFAULT;
1287 mask = ModeMask[p];
1288 shiftbit = p * 2;
1289 val = inb(info->opmode_ioaddr);
1290 val &= mask;
1291 val |= (opmode << shiftbit);
1292 outb(val, info->opmode_ioaddr);
1293 } else {
1294 shiftbit = p * 2;
1295 opmode = inb(info->opmode_ioaddr) >> shiftbit;
1296 opmode &= OP_MODE_MASK;
1297 if (copy_to_user(argp, &opmode, sizeof(int)))
1298 return -EFAULT;
1299 }
1300 return 0;
1301 }
1302 /* above add by Victor Yu. 01-05-2004 */
1303
1304 if ((cmd != TIOCGSERIAL) && (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
1305 if (tty->flags & (1 << TTY_IO_ERROR))
1306 return -EIO;
1307 }
1308 switch (cmd) {
1309 case TCSBRK: /* SVID version: non-zero arg --> no break */
1310 retval = tty_check_change(tty);
1311 if (retval)
1312 return retval;
1313 tty_wait_until_sent(tty, 0);
1314 if (!arg)
1315 mxser_send_break(info, HZ / 4); /* 1/4 second */
1316 return 0;
1317 case TCSBRKP: /* support for POSIX tcsendbreak() */
1318 retval = tty_check_change(tty);
1319 if (retval)
1320 return retval;
1321 tty_wait_until_sent(tty, 0);
1322 mxser_send_break(info, arg ? arg * (HZ / 10) : HZ / 4);
1323 return 0;
1324 case TIOCGSOFTCAR:
1325 return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned long __user *)argp);
1326 case TIOCSSOFTCAR:
1327 if (get_user(templ, (unsigned long __user *) argp))
1328 return -EFAULT;
1329 arg = templ;
1330 tty->termios->c_cflag = ((tty->termios->c_cflag & ~CLOCAL) | (arg ? CLOCAL : 0));
1331 return 0;
1332 case TIOCGSERIAL:
1333 return mxser_get_serial_info(info, argp);
1334 case TIOCSSERIAL:
1335 return mxser_set_serial_info(info, argp);
1336 case TIOCSERGETLSR: /* Get line status register */
1337 return mxser_get_lsr_info(info, argp);
1338 /*
1339 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
1340 * - mask passed in arg for lines of interest
1341 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
1342 * Caller should use TIOCGICOUNT to see which one it was
1343 */
1344 case TIOCMIWAIT: {
1345 DECLARE_WAITQUEUE(wait, current);
1346 int ret;
1347 spin_lock_irqsave(&info->slock, flags);
1348 cprev = info->icount; /* note the counters on entry */
1349 spin_unlock_irqrestore(&info->slock, flags);
1350
1351 add_wait_queue(&info->delta_msr_wait, &wait);
1352 while (1) {
1353 spin_lock_irqsave(&info->slock, flags);
1354 cnow = info->icount; /* atomic copy */
1355 spin_unlock_irqrestore(&info->slock, flags);
1356
1357 set_current_state(TASK_INTERRUPTIBLE);
1358 if (((arg & TIOCM_RNG) &&
1359 (cnow.rng != cprev.rng)) ||
1360 ((arg & TIOCM_DSR) &&
1361 (cnow.dsr != cprev.dsr)) ||
1362 ((arg & TIOCM_CD) &&
1363 (cnow.dcd != cprev.dcd)) ||
1364 ((arg & TIOCM_CTS) &&
1365 (cnow.cts != cprev.cts))) {
1366 ret = 0;
1367 break;
1368 }
1369 /* see if a signal did it */
1370 if (signal_pending(current)) {
1371 ret = -ERESTARTSYS;
1372 break;
1373 }
1374 cprev = cnow;
1375 }
1376 current->state = TASK_RUNNING;
1377 remove_wait_queue(&info->delta_msr_wait, &wait);
1378 break;
1379 }
1380 /* NOTREACHED */
1381 /*
1382 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
1383 * Return: write counters to the user passed counter struct
1384 * NB: both 1->0 and 0->1 transitions are counted except for
1385 * RI where only 0->1 is counted.
1386 */
1387 case TIOCGICOUNT:
1388 spin_lock_irqsave(&info->slock, flags);
1389 cnow = info->icount;
1390 spin_unlock_irqrestore(&info->slock, flags);
1391 p_cuser = argp;
1392 /* modified by casper 1/11/2000 */
1393 if (put_user(cnow.frame, &p_cuser->frame))
1394 return -EFAULT;
1395 if (put_user(cnow.brk, &p_cuser->brk))
1396 return -EFAULT;
1397 if (put_user(cnow.overrun, &p_cuser->overrun))
1398 return -EFAULT;
1399 if (put_user(cnow.buf_overrun, &p_cuser->buf_overrun))
1400 return -EFAULT;
1401 if (put_user(cnow.parity, &p_cuser->parity))
1402 return -EFAULT;
1403 if (put_user(cnow.rx, &p_cuser->rx))
1404 return -EFAULT;
1405 if (put_user(cnow.tx, &p_cuser->tx))
1406 return -EFAULT;
1407 put_user(cnow.cts, &p_cuser->cts);
1408 put_user(cnow.dsr, &p_cuser->dsr);
1409 put_user(cnow.rng, &p_cuser->rng);
1410 put_user(cnow.dcd, &p_cuser->dcd);
1411 return 0;
1412 case MOXA_HighSpeedOn:
1413 return put_user(info->baud_base != 115200 ? 1 : 0, (int __user *)argp);
1414 case MOXA_SDS_RSTICOUNTER: {
1415 info->mon_data.rxcnt = 0;
1416 info->mon_data.txcnt = 0;
1417 return 0;
1418 }
1419/* (above) added by James. */
1420 case MOXA_ASPP_SETBAUD:{
1421 long baud;
1422 if (get_user(baud, (long __user *)argp))
1423 return -EFAULT;
1424 mxser_set_baud(info, baud);
1425 return 0;
1426 }
1427 case MOXA_ASPP_GETBAUD:
1428 if (copy_to_user(argp, &info->realbaud, sizeof(long)))
1429 return -EFAULT;
1430
1431 return 0;
1432
1433 case MOXA_ASPP_OQUEUE:{
1434 int len, lsr;
1435
1436 len = mxser_chars_in_buffer(tty);
1437
1438 lsr = inb(info->base + UART_LSR) & UART_LSR_TEMT;
1439
1440 len += (lsr ? 0 : 1);
1441
1442 if (copy_to_user(argp, &len, sizeof(int)))
1443 return -EFAULT;
1444
1445 return 0;
1446 }
1447 case MOXA_ASPP_MON: {
1448 int mcr, status;
1449
1450 /* info->mon_data.ser_param = tty->termios->c_cflag; */
1451
1452 status = mxser_get_msr(info->base, 1, info->port, info);
1453 mxser_check_modem_status(info, status);
1454
1455 mcr = inb(info->base + UART_MCR);
1456 if (mcr & MOXA_MUST_MCR_XON_FLAG)
1457 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFHOLD;
1458 else
1459 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFHOLD;
1460
1461 if (mcr & MOXA_MUST_MCR_TX_XON)
1462 info->mon_data.hold_reason &= ~NPPI_NOTIFY_XOFFXENT;
1463 else
1464 info->mon_data.hold_reason |= NPPI_NOTIFY_XOFFXENT;
1465
1466 if (info->tty->hw_stopped)
1467 info->mon_data.hold_reason |= NPPI_NOTIFY_CTSHOLD;
1468 else
1469 info->mon_data.hold_reason &= ~NPPI_NOTIFY_CTSHOLD;
1470
1471 if (copy_to_user(argp, &info->mon_data,
1472 sizeof(struct mxser_mon)))
1473 return -EFAULT;
1474
1475 return 0;
1476 }
1477
1478 case MOXA_ASPP_LSTATUS: {
1479 if (copy_to_user(argp, &info->err_shadow,
1480 sizeof(unsigned char)))
1481 return -EFAULT;
1482
1483 info->err_shadow = 0;
1484 return 0;
1485 }
1486 case MOXA_SET_BAUD_METHOD: {
1487 int method;
1488
1489 if (get_user(method, (int __user *)argp))
1490 return -EFAULT;
1491 mxser_set_baud_method[info->port] = method;
1492 if (copy_to_user(argp, &method, sizeof(int)))
1493 return -EFAULT;
1494
1495 return 0;
1496 }
1497 default:
1498 return -ENOIOCTLCMD;
1499 }
1500 return 0;
1501}
1502
1503#ifndef CMSPAR
1504#define CMSPAR 010000000000
1505#endif
1506
1507static int mxser_ioctl_special(unsigned int cmd, void __user *argp)
1508{
1509 int i, result, status;
1510
1511 switch (cmd) {
1512 case MOXA_GET_CONF:
1513 if (copy_to_user(argp, mxsercfg,
1514 sizeof(struct mxser_hwconf) * 4))
1515 return -EFAULT;
1516 return 0;
1517 case MOXA_GET_MAJOR:
1518 if (copy_to_user(argp, &ttymajor, sizeof(int)))
1519 return -EFAULT;
1520 return 0;
1521
1522 case MOXA_GET_CUMAJOR:
1523 if (copy_to_user(argp, &calloutmajor, sizeof(int)))
1524 return -EFAULT;
1525 return 0;
1526
1527 case MOXA_CHKPORTENABLE:
1528 result = 0;
1529 for (i = 0; i < MXSER_PORTS; i++) {
1530 if (mxvar_table[i].base)
1531 result |= (1 << i);
1532 }
1533 return put_user(result, (unsigned long __user *)argp);
1534 case MOXA_GETDATACOUNT:
1535 if (copy_to_user(argp, &mxvar_log, sizeof(mxvar_log)))
1536 return -EFAULT;
1537 return 0;
1538 case MOXA_GETMSTATUS:
1539 for (i = 0; i < MXSER_PORTS; i++) {
1540 GMStatus[i].ri = 0;
1541 if (!mxvar_table[i].base) {
1542 GMStatus[i].dcd = 0;
1543 GMStatus[i].dsr = 0;
1544 GMStatus[i].cts = 0;
1545 continue;
1546 }
1547
1548 if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios)
1549 GMStatus[i].cflag = mxvar_table[i].normal_termios.c_cflag;
1550 else
1551 GMStatus[i].cflag = mxvar_table[i].tty->termios->c_cflag;
1552
1553 status = inb(mxvar_table[i].base + UART_MSR);
1554 if (status & 0x80 /*UART_MSR_DCD */ )
1555 GMStatus[i].dcd = 1;
1556 else
1557 GMStatus[i].dcd = 0;
1558
1559 if (status & 0x20 /*UART_MSR_DSR */ )
1560 GMStatus[i].dsr = 1;
1561 else
1562 GMStatus[i].dsr = 0;
1563
1564
1565 if (status & 0x10 /*UART_MSR_CTS */ )
1566 GMStatus[i].cts = 1;
1567 else
1568 GMStatus[i].cts = 0;
1569 }
1570 if (copy_to_user(argp, GMStatus,
1571 sizeof(struct mxser_mstatus) * MXSER_PORTS))
1572 return -EFAULT;
1573 return 0;
1574 case MOXA_ASPP_MON_EXT: {
1575 int status;
1576 int opmode, p;
1577 int shiftbit;
1578 unsigned cflag, iflag;
1579
1580 for (i = 0; i < MXSER_PORTS; i++) {
1581 if (!mxvar_table[i].base)
1582 continue;
1583
1584 status = mxser_get_msr(mxvar_table[i].base, 0,
1585 i, &(mxvar_table[i]));
1586 /*
1587 mxser_check_modem_status(&mxvar_table[i],
1588 status);
1589 */
1590 if (status & UART_MSR_TERI)
1591 mxvar_table[i].icount.rng++;
1592 if (status & UART_MSR_DDSR)
1593 mxvar_table[i].icount.dsr++;
1594 if (status & UART_MSR_DDCD)
1595 mxvar_table[i].icount.dcd++;
1596 if (status & UART_MSR_DCTS)
1597 mxvar_table[i].icount.cts++;
1598
1599 mxvar_table[i].mon_data.modem_status = status;
1600 mon_data_ext.rx_cnt[i] = mxvar_table[i].mon_data.rxcnt;
1601 mon_data_ext.tx_cnt[i] = mxvar_table[i].mon_data.txcnt;
1602 mon_data_ext.up_rxcnt[i] = mxvar_table[i].mon_data.up_rxcnt;
1603 mon_data_ext.up_txcnt[i] = mxvar_table[i].mon_data.up_txcnt;
1604 mon_data_ext.modem_status[i] = mxvar_table[i].mon_data.modem_status;
1605 mon_data_ext.baudrate[i] = mxvar_table[i].realbaud;
1606
1607 if (!mxvar_table[i].tty || !mxvar_table[i].tty->termios) {
1608 cflag = mxvar_table[i].normal_termios.c_cflag;
1609 iflag = mxvar_table[i].normal_termios.c_iflag;
1610 } else {
1611 cflag = mxvar_table[i].tty->termios->c_cflag;
1612 iflag = mxvar_table[i].tty->termios->c_iflag;
1613 }
1614
1615 mon_data_ext.databits[i] = cflag & CSIZE;
1616
1617 mon_data_ext.stopbits[i] = cflag & CSTOPB;
1618
1619 mon_data_ext.parity[i] = cflag & (PARENB | PARODD | CMSPAR);
1620
1621 mon_data_ext.flowctrl[i] = 0x00;
1622
1623 if (cflag & CRTSCTS)
1624 mon_data_ext.flowctrl[i] |= 0x03;
1625
1626 if (iflag & (IXON | IXOFF))
1627 mon_data_ext.flowctrl[i] |= 0x0C;
1628
1629 if (mxvar_table[i].type == PORT_16550A)
1630 mon_data_ext.fifo[i] = 1;
1631 else
1632 mon_data_ext.fifo[i] = 0;
1633
1634 p = i % 4;
1635 shiftbit = p * 2;
1636 opmode = inb(mxvar_table[i].opmode_ioaddr) >> shiftbit;
1637 opmode &= OP_MODE_MASK;
1638
1639 mon_data_ext.iftype[i] = opmode;
1640
1641 }
1642 if (copy_to_user(argp, &mon_data_ext, sizeof(struct mxser_mon_ext)))
1643 return -EFAULT;
1644
1645 return 0;
1646
1647 }
1648 default:
1649 return -ENOIOCTLCMD;
1650 }
1651 return 0;
1652}
1653
1654static void mxser_stoprx(struct tty_struct *tty)
1655{
1656 struct mxser_struct *info = tty->driver_data;
1657 /* unsigned long flags; */
1658
1659 info->ldisc_stop_rx = 1;
1660 if (I_IXOFF(tty)) {
1661 /* MX_LOCK(&info->slock); */
1662 /* following add by Victor Yu. 09-02-2002 */
1663 if (info->IsMoxaMustChipFlag) {
1664 info->IER &= ~MOXA_MUST_RECV_ISR;
1665 outb(info->IER, info->base + UART_IER);
1666 } else {
1667 /* above add by Victor Yu. 09-02-2002 */
1668 info->x_char = STOP_CHAR(tty);
1669 /* mask by Victor Yu. 09-02-2002 */
1670 /* outb(info->IER, 0); */
1671 outb(0, info->base + UART_IER);
1672 info->IER |= UART_IER_THRI;
1673 /* force Tx interrupt */
1674 outb(info->IER, info->base + UART_IER);
1675 } /* add by Victor Yu. 09-02-2002 */
1676 /* MX_UNLOCK(&info->slock); */
1677 }
1678
1679 if (info->tty->termios->c_cflag & CRTSCTS) {
1680 /* MX_LOCK(&info->slock); */
1681 info->MCR &= ~UART_MCR_RTS;
1682 outb(info->MCR, info->base + UART_MCR);
1683 /* MX_UNLOCK(&info->slock); */
1684 }
1685}
1686
1687static void mxser_startrx(struct tty_struct *tty)
1688{
1689 struct mxser_struct *info = tty->driver_data;
1690 /* unsigned long flags; */
1691
1692 info->ldisc_stop_rx = 0;
1693 if (I_IXOFF(tty)) {
1694 if (info->x_char)
1695 info->x_char = 0;
1696 else {
1697 /* MX_LOCK(&info->slock); */
1698
1699 /* following add by Victor Yu. 09-02-2002 */
1700 if (info->IsMoxaMustChipFlag) {
1701 info->IER |= MOXA_MUST_RECV_ISR;
1702 outb(info->IER, info->base + UART_IER);
1703 } else {
1704 /* above add by Victor Yu. 09-02-2002 */
1705
1706 info->x_char = START_CHAR(tty);
1707 /* mask by Victor Yu. 09-02-2002 */
1708 /* outb(info->IER, 0); */
1709 /* add by Victor Yu. 09-02-2002 */
1710 outb(0, info->base + UART_IER);
1711 /* force Tx interrupt */
1712 info->IER |= UART_IER_THRI;
1713 outb(info->IER, info->base + UART_IER);
1714 } /* add by Victor Yu. 09-02-2002 */
1715 /* MX_UNLOCK(&info->slock); */
1716 }
1717 }
1718
1719 if (info->tty->termios->c_cflag & CRTSCTS) {
1720 /* MX_LOCK(&info->slock); */
1721 info->MCR |= UART_MCR_RTS;
1722 outb(info->MCR, info->base + UART_MCR);
1723 /* MX_UNLOCK(&info->slock); */
1724 }
1725}
1726
1727/*
1728 * This routine is called by the upper-layer tty layer to signal that
1729 * incoming characters should be throttled.
1730 */
1731static void mxser_throttle(struct tty_struct *tty)
1732{
1733 /* struct mxser_struct *info = tty->driver_data; */
1734 /* unsigned long flags; */
1735
1736 /* MX_LOCK(&info->slock); */
1737 mxser_stoprx(tty);
1738 /* MX_UNLOCK(&info->slock); */
1739}
1740
1741static void mxser_unthrottle(struct tty_struct *tty)
1742{
1743 /* struct mxser_struct *info = tty->driver_data; */
1744 /* unsigned long flags; */
1745
1746 /* MX_LOCK(&info->slock); */
1747 mxser_startrx(tty);
1748 /* MX_UNLOCK(&info->slock); */
1749}
1750
1751static void mxser_set_termios(struct tty_struct *tty, struct termios *old_termios)
1752{
1753 struct mxser_struct *info = tty->driver_data;
1754 unsigned long flags;
1755
1756 if ((tty->termios->c_cflag != old_termios->c_cflag) ||
1757 (RELEVANT_IFLAG(tty->termios->c_iflag) != RELEVANT_IFLAG(old_termios->c_iflag))) {
1758
1759 mxser_change_speed(info, old_termios);
1760
1761 if ((old_termios->c_cflag & CRTSCTS) &&
1762 !(tty->termios->c_cflag & CRTSCTS)) {
1763 tty->hw_stopped = 0;
1764 mxser_start(tty);
1765 }
1766 }
1767
1768/* Handle sw stopped */
1769 if ((old_termios->c_iflag & IXON) &&
1770 !(tty->termios->c_iflag & IXON)) {
1771 tty->stopped = 0;
1772
1773 /* following add by Victor Yu. 09-02-2002 */
1774 if (info->IsMoxaMustChipFlag) {
1775 spin_lock_irqsave(&info->slock, flags);
1776 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
1777 spin_unlock_irqrestore(&info->slock, flags);
1778 }
1779 /* above add by Victor Yu. 09-02-2002 */
1780
1781 mxser_start(tty);
1782 }
1783}
1784
1785/*
1786 * mxser_stop() and mxser_start()
1787 *
1788 * This routines are called before setting or resetting tty->stopped.
1789 * They enable or disable transmitter interrupts, as necessary.
1790 */
1791static void mxser_stop(struct tty_struct *tty)
1792{
1793 struct mxser_struct *info = tty->driver_data;
1794 unsigned long flags;
1795
1796 spin_lock_irqsave(&info->slock, flags);
1797 if (info->IER & UART_IER_THRI) {
1798 info->IER &= ~UART_IER_THRI;
1799 outb(info->IER, info->base + UART_IER);
1800 }
1801 spin_unlock_irqrestore(&info->slock, flags);
1802}
1803
1804static void mxser_start(struct tty_struct *tty)
1805{
1806 struct mxser_struct *info = tty->driver_data;
1807 unsigned long flags;
1808
1809 spin_lock_irqsave(&info->slock, flags);
1810 if (info->xmit_cnt && info->xmit_buf && !(info->IER & UART_IER_THRI)) {
1811 info->IER |= UART_IER_THRI;
1812 outb(info->IER, info->base + UART_IER);
1813 }
1814 spin_unlock_irqrestore(&info->slock, flags);
1815}
1816
1817/*
1818 * mxser_wait_until_sent() --- wait until the transmitter is empty
1819 */
1820static void mxser_wait_until_sent(struct tty_struct *tty, int timeout)
1821{
1822 struct mxser_struct *info = tty->driver_data;
1823 unsigned long orig_jiffies, char_time;
1824 int lsr;
1825
1826 if (info->type == PORT_UNKNOWN)
1827 return;
1828
1829 if (info->xmit_fifo_size == 0)
1830 return; /* Just in case.... */
1831
1832 orig_jiffies = jiffies;
1833 /*
1834 * Set the check interval to be 1/5 of the estimated time to
1835 * send a single character, and make it at least 1. The check
1836 * interval should also be less than the timeout.
1837 *
1838 * Note: we have to use pretty tight timings here to satisfy
1839 * the NIST-PCTS.
1840 */
1841 char_time = (info->timeout - HZ / 50) / info->xmit_fifo_size;
1842 char_time = char_time / 5;
1843 if (char_time == 0)
1844 char_time = 1;
1845 if (timeout && timeout < char_time)
1846 char_time = timeout;
1847 /*
1848 * If the transmitter hasn't cleared in twice the approximate
1849 * amount of time to send the entire FIFO, it probably won't
1850 * ever clear. This assumes the UART isn't doing flow
1851 * control, which is currently the case. Hence, if it ever
1852 * takes longer than info->timeout, this is probably due to a
1853 * UART bug of some kind. So, we clamp the timeout parameter at
1854 * 2*info->timeout.
1855 */
1856 if (!timeout || timeout > 2 * info->timeout)
1857 timeout = 2 * info->timeout;
1858#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1859 printk(KERN_DEBUG "In rs_wait_until_sent(%d) check=%lu...",
1860 timeout, char_time);
1861 printk("jiff=%lu...", jiffies);
1862#endif
1863 while (!((lsr = inb(info->base + UART_LSR)) & UART_LSR_TEMT)) {
1864#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1865 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
1866#endif
1867 schedule_timeout_interruptible(char_time);
1868 if (signal_pending(current))
1869 break;
1870 if (timeout && time_after(jiffies, orig_jiffies + timeout))
1871 break;
1872 }
1873 set_current_state(TASK_RUNNING);
1874
1875#ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
1876 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
1877#endif
1878}
1879
1880
1881/*
1882 * This routine is called by tty_hangup() when a hangup is signaled.
1883 */
1884void mxser_hangup(struct tty_struct *tty)
1885{
1886 struct mxser_struct *info = tty->driver_data;
1887
1888 mxser_flush_buffer(tty);
1889 mxser_shutdown(info);
1890 info->event = 0;
1891 info->count = 0;
1892 info->flags &= ~ASYNC_NORMAL_ACTIVE;
1893 info->tty = NULL;
1894 wake_up_interruptible(&info->open_wait);
1895}
1896
1897
1898/* added by James 03-12-2004. */
1899/*
1900 * mxser_rs_break() --- routine which turns the break handling on or off
1901 */
1902static void mxser_rs_break(struct tty_struct *tty, int break_state)
1903{
1904 struct mxser_struct *info = tty->driver_data;
1905 unsigned long flags;
1906
1907 spin_lock_irqsave(&info->slock, flags);
1908 if (break_state == -1)
1909 outb(inb(info->base + UART_LCR) | UART_LCR_SBC,
1910 info->base + UART_LCR);
1911 else
1912 outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC,
1913 info->base + UART_LCR);
1914 spin_unlock_irqrestore(&info->slock, flags);
1915}
1916
1917/* (above) added by James. */
1918
1919
1920/*
1921 * This is the serial driver's generic interrupt routine
1922 */
1923static irqreturn_t mxser_interrupt(int irq, void *dev_id, struct pt_regs *regs)
1924{
1925 int status, iir, i;
1926 struct mxser_struct *info;
1927 struct mxser_struct *port;
1928 int max, irqbits, bits, msr;
1929 int pass_counter = 0;
1930 int handled = IRQ_NONE;
1931
1932 port = NULL;
1933 /* spin_lock(&gm_lock); */
1934
1935 for (i = 0; i < MXSER_BOARDS; i++) {
1936 if (dev_id == &(mxvar_table[i * MXSER_PORTS_PER_BOARD])) {
1937 port = dev_id;
1938 break;
1939 }
1940 }
1941
1942 if (i == MXSER_BOARDS)
1943 goto irq_stop;
1944 if (port == 0)
1945 goto irq_stop;
1946 max = mxser_numports[mxsercfg[i].board_type - 1];
1947 while (1) {
1948 irqbits = inb(port->vector) & port->vectormask;
1949 if (irqbits == port->vectormask)
1950 break;
1951
1952 handled = IRQ_HANDLED;
1953 for (i = 0, bits = 1; i < max; i++, irqbits |= bits, bits <<= 1) {
1954 if (irqbits == port->vectormask)
1955 break;
1956 if (bits & irqbits)
1957 continue;
1958 info = port + i;
1959
1960 /* following add by Victor Yu. 09-13-2002 */
1961 iir = inb(info->base + UART_IIR);
1962 if (iir & UART_IIR_NO_INT)
1963 continue;
1964 iir &= MOXA_MUST_IIR_MASK;
1965 if (!info->tty) {
1966 status = inb(info->base + UART_LSR);
1967 outb(0x27, info->base + UART_FCR);
1968 inb(info->base + UART_MSR);
1969 continue;
1970 }
1971 /* above add by Victor Yu. 09-13-2002 */
1972 /*
1973 if (info->tty->flip.count < TTY_FLIPBUF_SIZE / 4) {
1974 info->IER |= MOXA_MUST_RECV_ISR;
1975 outb(info->IER, info->base + UART_IER);
1976 }
1977 */
1978
1979
1980 /* mask by Victor Yu. 09-13-2002
1981 if ( !info->tty ||
1982 (inb(info->base + UART_IIR) & UART_IIR_NO_INT) )
1983 continue;
1984 */
1985 /* mask by Victor Yu. 09-02-2002
1986 status = inb(info->base + UART_LSR) & info->read_status_mask;
1987 */
1988
1989 /* following add by Victor Yu. 09-02-2002 */
1990 status = inb(info->base + UART_LSR);
1991
1992 if (status & UART_LSR_PE)
1993 info->err_shadow |= NPPI_NOTIFY_PARITY;
1994 if (status & UART_LSR_FE)
1995 info->err_shadow |= NPPI_NOTIFY_FRAMING;
1996 if (status & UART_LSR_OE)
1997 info->err_shadow |= NPPI_NOTIFY_HW_OVERRUN;
1998 if (status & UART_LSR_BI)
1999 info->err_shadow |= NPPI_NOTIFY_BREAK;
2000
2001 if (info->IsMoxaMustChipFlag) {
2002 /*
2003 if ( (status & 0x02) && !(status & 0x01) ) {
2004 outb(info->base+UART_FCR, 0x23);
2005 continue;
2006 }
2007 */
2008 if (iir == MOXA_MUST_IIR_GDA ||
2009 iir == MOXA_MUST_IIR_RDA ||
2010 iir == MOXA_MUST_IIR_RTO ||
2011 iir == MOXA_MUST_IIR_LSR)
2012 mxser_receive_chars(info, &status);
2013
2014 } else {
2015 /* above add by Victor Yu. 09-02-2002 */
2016
2017 status &= info->read_status_mask;
2018 if (status & UART_LSR_DR)
2019 mxser_receive_chars(info, &status);
2020 }
2021 msr = inb(info->base + UART_MSR);
2022 if (msr & UART_MSR_ANY_DELTA) {
2023 mxser_check_modem_status(info, msr);
2024 }
2025 /* following add by Victor Yu. 09-13-2002 */
2026 if (info->IsMoxaMustChipFlag) {
2027 if ((iir == 0x02) && (status & UART_LSR_THRE)) {
2028 mxser_transmit_chars(info);
2029 }
2030 } else {
2031 /* above add by Victor Yu. 09-13-2002 */
2032
2033 if (status & UART_LSR_THRE) {
2034/* 8-2-99 by William
2035 if ( info->x_char || (info->xmit_cnt > 0) )
2036*/
2037 mxser_transmit_chars(info);
2038 }
2039 }
2040 }
2041 if (pass_counter++ > MXSER_ISR_PASS_LIMIT) {
2042 break; /* Prevent infinite loops */
2043 }
2044 }
2045
2046 irq_stop:
2047 /* spin_unlock(&gm_lock); */
2048 return handled;
2049}
2050
2051static void mxser_receive_chars(struct mxser_struct *info, int *status)
2052{
2053 struct tty_struct *tty = info->tty;
2054 unsigned char ch, gdl;
2055 int ignored = 0;
2056 int cnt = 0;
2057 int recv_room;
2058 int max = 256;
2059 unsigned long flags;
2060
2061 spin_lock_irqsave(&info->slock, flags);
2062
2063 recv_room = tty->receive_room;
2064 if ((recv_room == 0) && (!info->ldisc_stop_rx)) {
2065 /* mxser_throttle(tty); */
2066 mxser_stoprx(tty);
2067 /* return; */
2068 }
2069
2070 /* following add by Victor Yu. 09-02-2002 */
2071 if (info->IsMoxaMustChipFlag != MOXA_OTHER_UART) {
2072
2073 if (*status & UART_LSR_SPECIAL) {
2074 goto intr_old;
2075 }
2076 /* following add by Victor Yu. 02-11-2004 */
2077 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU860_HWID &&
2078 (*status & MOXA_MUST_LSR_RERR))
2079 goto intr_old;
2080 /* above add by Victor Yu. 02-14-2004 */
2081 if (*status & MOXA_MUST_LSR_RERR)
2082 goto intr_old;
2083
2084 gdl = inb(info->base + MOXA_MUST_GDL_REGISTER);
2085
2086 /* add by Victor Yu. 02-11-2004 */
2087 if (info->IsMoxaMustChipFlag == MOXA_MUST_MU150_HWID)
2088 gdl &= MOXA_MUST_GDL_MASK;
2089 if (gdl >= recv_room) {
2090 if (!info->ldisc_stop_rx) {
2091 /* mxser_throttle(tty); */
2092 mxser_stoprx(tty);
2093 }
2094 /* return; */
2095 }
2096 while (gdl--) {
2097 ch = inb(info->base + UART_RX);
2098 tty_insert_flip_char(tty, ch, 0);
2099 cnt++;
2100 /*
2101 if ((cnt >= HI_WATER) && (info->stop_rx == 0)) {
2102 mxser_stoprx(tty);
2103 info->stop_rx = 1;
2104 break;
2105 } */
2106 }
2107 goto end_intr;
2108 }
2109 intr_old:
2110 /* above add by Victor Yu. 09-02-2002 */
2111
2112 do {
2113 if (max-- < 0)
2114 break;
2115 /*
2116 if ((cnt >= HI_WATER) && (info->stop_rx == 0)) {
2117 mxser_stoprx(tty);
2118 info->stop_rx=1;
2119 break;
2120 }
2121 */
2122
2123 ch = inb(info->base + UART_RX);
2124 /* following add by Victor Yu. 09-02-2002 */
2125 if (info->IsMoxaMustChipFlag && (*status & UART_LSR_OE) /*&& !(*status&UART_LSR_DR) */ )
2126 outb(0x23, info->base + UART_FCR);
2127 *status &= info->read_status_mask;
2128 /* above add by Victor Yu. 09-02-2002 */
2129 if (*status & info->ignore_status_mask) {
2130 if (++ignored > 100)
2131 break;
2132 } else {
2133 char flag = 0;
2134 if (*status & UART_LSR_SPECIAL) {
2135 if (*status & UART_LSR_BI) {
2136 flag = TTY_BREAK;
2137/* added by casper 1/11/2000 */
2138 info->icount.brk++;
2139/* */
2140 if (info->flags & ASYNC_SAK)
2141 do_SAK(tty);
2142 } else if (*status & UART_LSR_PE) {
2143 flag = TTY_PARITY;
2144/* added by casper 1/11/2000 */
2145 info->icount.parity++;
2146/* */
2147 } else if (*status & UART_LSR_FE) {
2148 flag = TTY_FRAME;
2149/* added by casper 1/11/2000 */
2150 info->icount.frame++;
2151/* */
2152 } else if (*status & UART_LSR_OE) {
2153 flag = TTY_OVERRUN;
2154/* added by casper 1/11/2000 */
2155 info->icount.overrun++;
2156/* */
2157 }
2158 }
2159 tty_insert_flip_char(tty, ch, flag);
2160 cnt++;
2161 if (cnt >= recv_room) {
2162 if (!info->ldisc_stop_rx) {
2163 /* mxser_throttle(tty); */
2164 mxser_stoprx(tty);
2165 }
2166 break;
2167 }
2168
2169 }
2170
2171 /* following add by Victor Yu. 09-02-2002 */
2172 if (info->IsMoxaMustChipFlag)
2173 break;
2174 /* above add by Victor Yu. 09-02-2002 */
2175
2176 /* mask by Victor Yu. 09-02-2002
2177 *status = inb(info->base + UART_LSR) & info->read_status_mask;
2178 */
2179 /* following add by Victor Yu. 09-02-2002 */
2180 *status = inb(info->base + UART_LSR);
2181 /* above add by Victor Yu. 09-02-2002 */
2182 } while (*status & UART_LSR_DR);
2183
2184end_intr: /* add by Victor Yu. 09-02-2002 */
2185 mxvar_log.rxcnt[info->port] += cnt;
2186 info->mon_data.rxcnt += cnt;
2187 info->mon_data.up_rxcnt += cnt;
2188 spin_unlock_irqrestore(&info->slock, flags);
2189
2190 tty_flip_buffer_push(tty);
2191}
2192
2193static void mxser_transmit_chars(struct mxser_struct *info)
2194{
2195 int count, cnt;
2196 unsigned long flags;
2197
2198 spin_lock_irqsave(&info->slock, flags);
2199
2200 if (info->x_char) {
2201 outb(info->x_char, info->base + UART_TX);
2202 info->x_char = 0;
2203 mxvar_log.txcnt[info->port]++;
2204 info->mon_data.txcnt++;
2205 info->mon_data.up_txcnt++;
2206
2207/* added by casper 1/11/2000 */
2208 info->icount.tx++;
2209/* */
2210 spin_unlock_irqrestore(&info->slock, flags);
2211 return;
2212 }
2213
2214 if (info->xmit_buf == 0) {
2215 spin_unlock_irqrestore(&info->slock, flags);
2216 return;
2217 }
2218
2219 if ((info->xmit_cnt <= 0) || info->tty->stopped ||
2220 (info->tty->hw_stopped &&
2221 (info->type != PORT_16550A) &&
2222 (!info->IsMoxaMustChipFlag))) {
2223 info->IER &= ~UART_IER_THRI;
2224 outb(info->IER, info->base + UART_IER);
2225 spin_unlock_irqrestore(&info->slock, flags);
2226 return;
2227 }
2228
2229 cnt = info->xmit_cnt;
2230 count = info->xmit_fifo_size;
2231 do {
2232 outb(info->xmit_buf[info->xmit_tail++],
2233 info->base + UART_TX);
2234 info->xmit_tail = info->xmit_tail & (SERIAL_XMIT_SIZE - 1);
2235 if (--info->xmit_cnt <= 0)
2236 break;
2237 } while (--count > 0);
2238 mxvar_log.txcnt[info->port] += (cnt - info->xmit_cnt);
2239
2240/* added by James 03-12-2004. */
2241 info->mon_data.txcnt += (cnt - info->xmit_cnt);
2242 info->mon_data.up_txcnt += (cnt - info->xmit_cnt);
2243/* (above) added by James. */
2244
2245/* added by casper 1/11/2000 */
2246 info->icount.tx += (cnt - info->xmit_cnt);
2247/* */
2248
2249 if (info->xmit_cnt < WAKEUP_CHARS) {
2250 set_bit(MXSER_EVENT_TXLOW, &info->event);
2251 schedule_work(&info->tqueue);
2252 }
2253 if (info->xmit_cnt <= 0) {
2254 info->IER &= ~UART_IER_THRI;
2255 outb(info->IER, info->base + UART_IER);
2256 }
2257 spin_unlock_irqrestore(&info->slock, flags);
2258}
2259
2260static void mxser_check_modem_status(struct mxser_struct *info, int status)
2261{
2262 /* update input line counters */
2263 if (status & UART_MSR_TERI)
2264 info->icount.rng++;
2265 if (status & UART_MSR_DDSR)
2266 info->icount.dsr++;
2267 if (status & UART_MSR_DDCD)
2268 info->icount.dcd++;
2269 if (status & UART_MSR_DCTS)
2270 info->icount.cts++;
2271 info->mon_data.modem_status = status;
2272 wake_up_interruptible(&info->delta_msr_wait);
2273
2274 if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
2275 if (status & UART_MSR_DCD)
2276 wake_up_interruptible(&info->open_wait);
2277 schedule_work(&info->tqueue);
2278 }
2279
2280 if (info->flags & ASYNC_CTS_FLOW) {
2281 if (info->tty->hw_stopped) {
2282 if (status & UART_MSR_CTS) {
2283 info->tty->hw_stopped = 0;
2284
2285 if ((info->type != PORT_16550A) &&
2286 (!info->IsMoxaMustChipFlag)) {
2287 info->IER |= UART_IER_THRI;
2288 outb(info->IER, info->base + UART_IER);
2289 }
2290 set_bit(MXSER_EVENT_TXLOW, &info->event);
2291 schedule_work(&info->tqueue); }
2292 } else {
2293 if (!(status & UART_MSR_CTS)) {
2294 info->tty->hw_stopped = 1;
2295 if ((info->type != PORT_16550A) &&
2296 (!info->IsMoxaMustChipFlag)) {
2297 info->IER &= ~UART_IER_THRI;
2298 outb(info->IER, info->base + UART_IER);
2299 }
2300 }
2301 }
2302 }
2303}
2304
2305static int mxser_block_til_ready(struct tty_struct *tty, struct file *filp, struct mxser_struct *info)
2306{
2307 DECLARE_WAITQUEUE(wait, current);
2308 int retval;
2309 int do_clocal = 0;
2310 unsigned long flags;
2311
2312 /*
2313 * If non-blocking mode is set, or the port is not enabled,
2314 * then make the check up front and then exit.
2315 */
2316 if ((filp->f_flags & O_NONBLOCK) || (tty->flags & (1 << TTY_IO_ERROR))) {
2317 info->flags |= ASYNC_NORMAL_ACTIVE;
2318 return 0;
2319 }
2320
2321 if (tty->termios->c_cflag & CLOCAL)
2322 do_clocal = 1;
2323
2324 /*
2325 * Block waiting for the carrier detect and the line to become
2326 * free (i.e., not in use by the callout). While we are in
2327 * this loop, info->count is dropped by one, so that
2328 * mxser_close() knows when to free things. We restore it upon
2329 * exit, either normal or abnormal.
2330 */
2331 retval = 0;
2332 add_wait_queue(&info->open_wait, &wait);
2333
2334 spin_lock_irqsave(&info->slock, flags);
2335 if (!tty_hung_up_p(filp))
2336 info->count--;
2337 spin_unlock_irqrestore(&info->slock, flags);
2338 info->blocked_open++;
2339 while (1) {
2340 spin_lock_irqsave(&info->slock, flags);
2341 outb(inb(info->base + UART_MCR) |
2342 UART_MCR_DTR | UART_MCR_RTS, info->base + UART_MCR);
2343 spin_unlock_irqrestore(&info->slock, flags);
2344 set_current_state(TASK_INTERRUPTIBLE);
2345 if (tty_hung_up_p(filp) || !(info->flags & ASYNC_INITIALIZED)) {
2346 if (info->flags & ASYNC_HUP_NOTIFY)
2347 retval = -EAGAIN;
2348 else
2349 retval = -ERESTARTSYS;
2350 break;
2351 }
2352 if (!(info->flags & ASYNC_CLOSING) &&
2353 (do_clocal ||
2354 (inb(info->base + UART_MSR) & UART_MSR_DCD)))
2355 break;
2356 if (signal_pending(current)) {
2357 retval = -ERESTARTSYS;
2358 break;
2359 }
2360 schedule();
2361 }
2362 set_current_state(TASK_RUNNING);
2363 remove_wait_queue(&info->open_wait, &wait);
2364 if (!tty_hung_up_p(filp))
2365 info->count++;
2366 info->blocked_open--;
2367 if (retval)
2368 return retval;
2369 info->flags |= ASYNC_NORMAL_ACTIVE;
2370 return 0;
2371}
2372
2373static int mxser_startup(struct mxser_struct *info)
2374{
2375 unsigned long page;
2376 unsigned long flags;
2377
2378 page = __get_free_page(GFP_KERNEL);
2379 if (!page)
2380 return -ENOMEM;
2381
2382 spin_lock_irqsave(&info->slock, flags);
2383
2384 if (info->flags & ASYNC_INITIALIZED) {
2385 free_page(page);
2386 spin_unlock_irqrestore(&info->slock, flags);
2387 return 0;
2388 }
2389
2390 if (!info->base || !info->type) {
2391 if (info->tty)
2392 set_bit(TTY_IO_ERROR, &info->tty->flags);
2393 free_page(page);
2394 spin_unlock_irqrestore(&info->slock, flags);
2395 return 0;
2396 }
2397 if (info->xmit_buf)
2398 free_page(page);
2399 else
2400 info->xmit_buf = (unsigned char *) page;
2401
2402 /*
2403 * Clear the FIFO buffers and disable them
2404 * (they will be reenabled in mxser_change_speed())
2405 */
2406 if (info->IsMoxaMustChipFlag)
2407 outb((UART_FCR_CLEAR_RCVR |
2408 UART_FCR_CLEAR_XMIT |
2409 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2410 else
2411 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
2412 info->base + UART_FCR);
2413
2414 /*
2415 * At this point there's no way the LSR could still be 0xFF;
2416 * if it is, then bail out, because there's likely no UART
2417 * here.
2418 */
2419 if (inb(info->base + UART_LSR) == 0xff) {
2420 spin_unlock_irqrestore(&info->slock, flags);
2421 if (capable(CAP_SYS_ADMIN)) {
2422 if (info->tty)
2423 set_bit(TTY_IO_ERROR, &info->tty->flags);
2424 return 0;
2425 } else
2426 return -ENODEV;
2427 }
2428
2429 /*
2430 * Clear the interrupt registers.
2431 */
2432 (void) inb(info->base + UART_LSR);
2433 (void) inb(info->base + UART_RX);
2434 (void) inb(info->base + UART_IIR);
2435 (void) inb(info->base + UART_MSR);
2436
2437 /*
2438 * Now, initialize the UART
2439 */
2440 outb(UART_LCR_WLEN8, info->base + UART_LCR); /* reset DLAB */
2441 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
2442 outb(info->MCR, info->base + UART_MCR);
2443
2444 /*
2445 * Finally, enable interrupts
2446 */
2447 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
2448 /* info->IER = UART_IER_RLSI | UART_IER_RDI; */
2449
2450 /* following add by Victor Yu. 08-30-2002 */
2451 if (info->IsMoxaMustChipFlag)
2452 info->IER |= MOXA_MUST_IER_EGDAI;
2453 /* above add by Victor Yu. 08-30-2002 */
2454 outb(info->IER, info->base + UART_IER); /* enable interrupts */
2455
2456 /*
2457 * And clear the interrupt registers again for luck.
2458 */
2459 (void) inb(info->base + UART_LSR);
2460 (void) inb(info->base + UART_RX);
2461 (void) inb(info->base + UART_IIR);
2462 (void) inb(info->base + UART_MSR);
2463
2464 if (info->tty)
2465 clear_bit(TTY_IO_ERROR, &info->tty->flags);
2466 info->xmit_cnt = info->xmit_head = info->xmit_tail = 0;
2467
2468 /*
2469 * and set the speed of the serial port
2470 */
2471 spin_unlock_irqrestore(&info->slock, flags);
2472 mxser_change_speed(info, NULL);
2473
2474 info->flags |= ASYNC_INITIALIZED;
2475 return 0;
2476}
2477
2478/*
2479 * This routine will shutdown a serial port; interrupts maybe disabled, and
2480 * DTR is dropped if the hangup on close termio flag is on.
2481 */
2482static void mxser_shutdown(struct mxser_struct *info)
2483{
2484 unsigned long flags;
2485
2486 if (!(info->flags & ASYNC_INITIALIZED))
2487 return;
2488
2489 spin_lock_irqsave(&info->slock, flags);
2490
2491 /*
2492 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
2493 * here so the queue might never be waken up
2494 */
2495 wake_up_interruptible(&info->delta_msr_wait);
2496
2497 /*
2498 * Free the IRQ, if necessary
2499 */
2500 if (info->xmit_buf) {
2501 free_page((unsigned long) info->xmit_buf);
2502 info->xmit_buf = NULL;
2503 }
2504
2505 info->IER = 0;
2506 outb(0x00, info->base + UART_IER);
2507
2508 if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
2509 info->MCR &= ~(UART_MCR_DTR | UART_MCR_RTS);
2510 outb(info->MCR, info->base + UART_MCR);
2511
2512 /* clear Rx/Tx FIFO's */
2513 /* following add by Victor Yu. 08-30-2002 */
2514 if (info->IsMoxaMustChipFlag)
2515 outb((UART_FCR_CLEAR_RCVR |
2516 UART_FCR_CLEAR_XMIT |
2517 MOXA_MUST_FCR_GDA_MODE_ENABLE), info->base + UART_FCR);
2518 else
2519 /* above add by Victor Yu. 08-30-2002 */
2520 outb((UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT),
2521 info->base + UART_FCR);
2522
2523 /* read data port to reset things */
2524 (void) inb(info->base + UART_RX);
2525
2526 if (info->tty)
2527 set_bit(TTY_IO_ERROR, &info->tty->flags);
2528
2529 info->flags &= ~ASYNC_INITIALIZED;
2530
2531 /* following add by Victor Yu. 09-23-2002 */
2532 if (info->IsMoxaMustChipFlag)
2533 SET_MOXA_MUST_NO_SOFTWARE_FLOW_CONTROL(info->base);
2534 /* above add by Victor Yu. 09-23-2002 */
2535
2536 spin_unlock_irqrestore(&info->slock, flags);
2537}
2538
2539/*
2540 * This routine is called to set the UART divisor registers to match
2541 * the specified baud rate for a serial port.
2542 */
2543static int mxser_change_speed(struct mxser_struct *info, struct termios *old_termios)
2544{
2545 unsigned cflag, cval, fcr;
2546 int ret = 0;
2547 unsigned char status;
2548 long baud;
2549 unsigned long flags;
2550
2551 if (!info->tty || !info->tty->termios)
2552 return ret;
2553 cflag = info->tty->termios->c_cflag;
2554 if (!(info->base))
2555 return ret;
2556
2557#ifndef B921600
2558#define B921600 (B460800 +1)
2559#endif
2560 if (mxser_set_baud_method[info->port] == 0) {
2561 baud = tty_get_baud_rate(info->tty);
2562 mxser_set_baud(info, baud);
2563 }
2564
2565 /* byte size and parity */
2566 switch (cflag & CSIZE) {
2567 case CS5:
2568 cval = 0x00;
2569 break;
2570 case CS6:
2571 cval = 0x01;
2572 break;
2573 case CS7:
2574 cval = 0x02;
2575 break;
2576 case CS8:
2577 cval = 0x03;
2578 break;
2579 default:
2580 cval = 0x00;
2581 break; /* too keep GCC shut... */
2582 }
2583 if (cflag & CSTOPB)
2584 cval |= 0x04;
2585 if (cflag & PARENB)
2586 cval |= UART_LCR_PARITY;
2587 if (!(cflag & PARODD))
2588 cval |= UART_LCR_EPAR;
2589 if (cflag & CMSPAR)
2590 cval |= UART_LCR_SPAR;
2591
2592 if ((info->type == PORT_8250) || (info->type == PORT_16450)) {
2593 if (info->IsMoxaMustChipFlag) {
2594 fcr = UART_FCR_ENABLE_FIFO;
2595 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2596 SET_MOXA_MUST_FIFO_VALUE(info);
2597 } else
2598 fcr = 0;
2599 } else {
2600 fcr = UART_FCR_ENABLE_FIFO;
2601 /* following add by Victor Yu. 08-30-2002 */
2602 if (info->IsMoxaMustChipFlag) {
2603 fcr |= MOXA_MUST_FCR_GDA_MODE_ENABLE;
2604 SET_MOXA_MUST_FIFO_VALUE(info);
2605 } else {
2606 /* above add by Victor Yu. 08-30-2002 */
2607 switch (info->rx_trigger) {
2608 case 1:
2609 fcr |= UART_FCR_TRIGGER_1;
2610 break;
2611 case 4:
2612 fcr |= UART_FCR_TRIGGER_4;
2613 break;
2614 case 8:
2615 fcr |= UART_FCR_TRIGGER_8;
2616 break;
2617 default:
2618 fcr |= UART_FCR_TRIGGER_14;
2619 break;
2620 }
2621 }
2622 }
2623
2624 /* CTS flow control flag and modem status interrupts */
2625 info->IER &= ~UART_IER_MSI;
2626 info->MCR &= ~UART_MCR_AFE;
2627 if (cflag & CRTSCTS) {
2628 info->flags |= ASYNC_CTS_FLOW;
2629 info->IER |= UART_IER_MSI;
2630 if ((info->type == PORT_16550A) || (info->IsMoxaMustChipFlag)) {
2631 info->MCR |= UART_MCR_AFE;
2632 /* status = mxser_get_msr(info->base, 0, info->port); */
2633/*
2634 save_flags(flags);
2635 cli();
2636 status = inb(baseaddr + UART_MSR);
2637 restore_flags(flags);
2638*/
2639 /* mxser_check_modem_status(info, status); */
2640 } else {
2641 /* status = mxser_get_msr(info->base, 0, info->port); */
2642 /* MX_LOCK(&info->slock); */
2643 status = inb(info->base + UART_MSR);
2644 /* MX_UNLOCK(&info->slock); */
2645 if (info->tty->hw_stopped) {
2646 if (status & UART_MSR_CTS) {
2647 info->tty->hw_stopped = 0;
2648 if ((info->type != PORT_16550A) &&
2649 (!info->IsMoxaMustChipFlag)) {
2650 info->IER |= UART_IER_THRI;
2651 outb(info->IER, info->base + UART_IER);
2652 }
2653 set_bit(MXSER_EVENT_TXLOW, &info->event);
2654 schedule_work(&info->tqueue); }
2655 } else {
2656 if (!(status & UART_MSR_CTS)) {
2657 info->tty->hw_stopped = 1;
2658 if ((info->type != PORT_16550A) &&
2659 (!info->IsMoxaMustChipFlag)) {
2660 info->IER &= ~UART_IER_THRI;
2661 outb(info->IER, info->base + UART_IER);
2662 }
2663 }
2664 }
2665 }
2666 } else {
2667 info->flags &= ~ASYNC_CTS_FLOW;
2668 }
2669 outb(info->MCR, info->base + UART_MCR);
2670 if (cflag & CLOCAL) {
2671 info->flags &= ~ASYNC_CHECK_CD;
2672 } else {
2673 info->flags |= ASYNC_CHECK_CD;
2674 info->IER |= UART_IER_MSI;
2675 }
2676 outb(info->IER, info->base + UART_IER);
2677
2678 /*
2679 * Set up parity check flag
2680 */
2681 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
2682 if (I_INPCK(info->tty))
2683 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
2684 if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
2685 info->read_status_mask |= UART_LSR_BI;
2686
2687 info->ignore_status_mask = 0;
2688
2689 if (I_IGNBRK(info->tty)) {
2690 info->ignore_status_mask |= UART_LSR_BI;
2691 info->read_status_mask |= UART_LSR_BI;
2692 /*
2693 * If we're ignore parity and break indicators, ignore
2694 * overruns too. (For real raw support).
2695 */
2696 if (I_IGNPAR(info->tty)) {
2697 info->ignore_status_mask |=
2698 UART_LSR_OE |
2699 UART_LSR_PE |
2700 UART_LSR_FE;
2701 info->read_status_mask |=
2702 UART_LSR_OE |
2703 UART_LSR_PE |
2704 UART_LSR_FE;
2705 }
2706 }
2707 /* following add by Victor Yu. 09-02-2002 */
2708 if (info->IsMoxaMustChipFlag) {
2709 spin_lock_irqsave(&info->slock, flags);
2710 SET_MOXA_MUST_XON1_VALUE(info->base, START_CHAR(info->tty));
2711 SET_MOXA_MUST_XOFF1_VALUE(info->base, STOP_CHAR(info->tty));
2712 if (I_IXON(info->tty)) {
2713 ENABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2714 } else {
2715 DISABLE_MOXA_MUST_RX_SOFTWARE_FLOW_CONTROL(info->base);
2716 }
2717 if (I_IXOFF(info->tty)) {
2718 ENABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2719 } else {
2720 DISABLE_MOXA_MUST_TX_SOFTWARE_FLOW_CONTROL(info->base);
2721 }
2722 /*
2723 if ( I_IXANY(info->tty) ) {
2724 info->MCR |= MOXA_MUST_MCR_XON_ANY;
2725 ENABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2726 } else {
2727 info->MCR &= ~MOXA_MUST_MCR_XON_ANY;
2728 DISABLE_MOXA_MUST_XON_ANY_FLOW_CONTROL(info->base);
2729 }
2730 */
2731 spin_unlock_irqrestore(&info->slock, flags);
2732 }
2733 /* above add by Victor Yu. 09-02-2002 */
2734
2735
2736 outb(fcr, info->base + UART_FCR); /* set fcr */
2737 outb(cval, info->base + UART_LCR);
2738
2739 return ret;
2740}
2741
2742
2743static int mxser_set_baud(struct mxser_struct *info, long newspd)
2744{
2745 int quot = 0;
2746 unsigned char cval;
2747 int ret = 0;
2748 unsigned long flags;
2749
2750 if (!info->tty || !info->tty->termios)
2751 return ret;
2752
2753 if (!(info->base))
2754 return ret;
2755
2756 if (newspd > info->MaxCanSetBaudRate)
2757 return 0;
2758
2759 info->realbaud = newspd;
2760 if (newspd == 134) {
2761 quot = (2 * info->baud_base / 269);
2762 } else if (newspd) {
2763 quot = info->baud_base / newspd;
2764 if (quot == 0)
2765 quot = 1;
2766 } else {
2767 quot = 0;
2768 }
2769
2770 info->timeout = ((info->xmit_fifo_size * HZ * 10 * quot) / info->baud_base);
2771 info->timeout += HZ / 50; /* Add .02 seconds of slop */
2772
2773 if (quot) {
2774 spin_lock_irqsave(&info->slock, flags);
2775 info->MCR |= UART_MCR_DTR;
2776 outb(info->MCR, info->base + UART_MCR);
2777 spin_unlock_irqrestore(&info->slock, flags);
2778 } else {
2779 spin_lock_irqsave(&info->slock, flags);
2780 info->MCR &= ~UART_MCR_DTR;
2781 outb(info->MCR, info->base + UART_MCR);
2782 spin_unlock_irqrestore(&info->slock, flags);
2783 return ret;
2784 }
2785
2786 cval = inb(info->base + UART_LCR);
2787
2788 outb(cval | UART_LCR_DLAB, info->base + UART_LCR); /* set DLAB */
2789
2790 outb(quot & 0xff, info->base + UART_DLL); /* LS of divisor */
2791 outb(quot >> 8, info->base + UART_DLM); /* MS of divisor */
2792 outb(cval, info->base + UART_LCR); /* reset DLAB */
2793
2794
2795 return ret;
2796}
2797
2798/*
2799 * ------------------------------------------------------------
2800 * friends of mxser_ioctl()
2801 * ------------------------------------------------------------
2802 */
2803static int mxser_get_serial_info(struct mxser_struct *info, struct serial_struct __user *retinfo)
2804{
2805 struct serial_struct tmp;
2806
2807 if (!retinfo)
2808 return -EFAULT;
2809 memset(&tmp, 0, sizeof(tmp));
2810 tmp.type = info->type;
2811 tmp.line = info->port;
2812 tmp.port = info->base;
2813 tmp.irq = info->irq;
2814 tmp.flags = info->flags;
2815 tmp.baud_base = info->baud_base;
2816 tmp.close_delay = info->close_delay;
2817 tmp.closing_wait = info->closing_wait;
2818 tmp.custom_divisor = info->custom_divisor;
2819 tmp.hub6 = 0;
2820 if (copy_to_user(retinfo, &tmp, sizeof(*retinfo)))
2821 return -EFAULT;
2822 return 0;
2823}
2824
2825static int mxser_set_serial_info(struct mxser_struct *info, struct serial_struct __user *new_info)
2826{
2827 struct serial_struct new_serial;
2828 unsigned int flags;
2829 int retval = 0;
2830
2831 if (!new_info || !info->base)
2832 return -EFAULT;
2833 if (copy_from_user(&new_serial, new_info, sizeof(new_serial)))
2834 return -EFAULT;
2835
2836 if ((new_serial.irq != info->irq) ||
2837 (new_serial.port != info->base) ||
2838 (new_serial.custom_divisor != info->custom_divisor) ||
2839 (new_serial.baud_base != info->baud_base))
2840 return -EPERM;
2841
2842 flags = info->flags & ASYNC_SPD_MASK;
2843
2844 if (!capable(CAP_SYS_ADMIN)) {
2845 if ((new_serial.baud_base != info->baud_base) ||
2846 (new_serial.close_delay != info->close_delay) ||
2847 ((new_serial.flags & ~ASYNC_USR_MASK) != (info->flags & ~ASYNC_USR_MASK)))
2848 return -EPERM;
2849 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
2850 (new_serial.flags & ASYNC_USR_MASK));
2851 } else {
2852 /*
2853 * OK, past this point, all the error checking has been done.
2854 * At this point, we start making changes.....
2855 */
2856 info->flags = ((info->flags & ~ASYNC_FLAGS) |
2857 (new_serial.flags & ASYNC_FLAGS));
2858 info->close_delay = new_serial.close_delay * HZ / 100;
2859 info->closing_wait = new_serial.closing_wait * HZ / 100;
2860 info->tty->low_latency =
2861 (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2862 info->tty->low_latency = 0; /* (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0; */
2863 }
2864
2865 /* added by casper, 3/17/2000, for mouse */
2866 info->type = new_serial.type;
2867
2868 process_txrx_fifo(info);
2869
2870 if (info->flags & ASYNC_INITIALIZED) {
2871 if (flags != (info->flags & ASYNC_SPD_MASK)) {
2872 mxser_change_speed(info, NULL);
2873 }
2874 } else {
2875 retval = mxser_startup(info);
2876 }
2877 return retval;
2878}
2879
2880/*
2881 * mxser_get_lsr_info - get line status register info
2882 *
2883 * Purpose: Let user call ioctl() to get info when the UART physically
2884 * is emptied. On bus types like RS485, the transmitter must
2885 * release the bus after transmitting. This must be done when
2886 * the transmit shift register is empty, not be done when the
2887 * transmit holding register is empty. This functionality
2888 * allows an RS485 driver to be written in user space.
2889 */
2890static int mxser_get_lsr_info(struct mxser_struct *info, unsigned int __user *value)
2891{
2892 unsigned char status;
2893 unsigned int result;
2894 unsigned long flags;
2895
2896 spin_lock_irqsave(&info->slock, flags);
2897 status = inb(info->base + UART_LSR);
2898 spin_unlock_irqrestore(&info->slock, flags);
2899 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
2900 return put_user(result, value);
2901}
2902
2903/*
2904 * This routine sends a break character out the serial port.
2905 */
2906static void mxser_send_break(struct mxser_struct *info, int duration)
2907{
2908 unsigned long flags;
2909
2910 if (!info->base)
2911 return;
2912 set_current_state(TASK_INTERRUPTIBLE);
2913 spin_lock_irqsave(&info->slock, flags);
2914 outb(inb(info->base + UART_LCR) | UART_LCR_SBC,
2915 info->base + UART_LCR);
2916 spin_unlock_irqrestore(&info->slock, flags);
2917 schedule_timeout(duration);
2918 spin_lock_irqsave(&info->slock, flags);
2919 outb(inb(info->base + UART_LCR) & ~UART_LCR_SBC,
2920 info->base + UART_LCR);
2921 spin_unlock_irqrestore(&info->slock, flags);
2922}
2923
2924static int mxser_tiocmget(struct tty_struct *tty, struct file *file)
2925{
2926 struct mxser_struct *info = tty->driver_data;
2927 unsigned char control, status;
2928 unsigned long flags;
2929
2930
2931 if (tty->index == MXSER_PORTS)
2932 return -ENOIOCTLCMD;
2933 if (tty->flags & (1 << TTY_IO_ERROR))
2934 return -EIO;
2935
2936 control = info->MCR;
2937
2938 spin_lock_irqsave(&info->slock, flags);
2939 status = inb(info->base + UART_MSR);
2940 if (status & UART_MSR_ANY_DELTA)
2941 mxser_check_modem_status(info, status);
2942 spin_unlock_irqrestore(&info->slock, flags);
2943 return ((control & UART_MCR_RTS) ? TIOCM_RTS : 0) |
2944 ((control & UART_MCR_DTR) ? TIOCM_DTR : 0) |
2945 ((status & UART_MSR_DCD) ? TIOCM_CAR : 0) |
2946 ((status & UART_MSR_RI) ? TIOCM_RNG : 0) |
2947 ((status & UART_MSR_DSR) ? TIOCM_DSR : 0) |
2948 ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
2949}
2950
2951static int mxser_tiocmset(struct tty_struct *tty, struct file *file, unsigned int set, unsigned int clear)
2952{
2953 struct mxser_struct *info = tty->driver_data;
2954 unsigned long flags;
2955
2956
2957 if (tty->index == MXSER_PORTS)
2958 return -ENOIOCTLCMD;
2959 if (tty->flags & (1 << TTY_IO_ERROR))
2960 return -EIO;
2961
2962 spin_lock_irqsave(&info->slock, flags);
2963
2964 if (set & TIOCM_RTS)
2965 info->MCR |= UART_MCR_RTS;
2966 if (set & TIOCM_DTR)
2967 info->MCR |= UART_MCR_DTR;
2968
2969 if (clear & TIOCM_RTS)
2970 info->MCR &= ~UART_MCR_RTS;
2971 if (clear & TIOCM_DTR)
2972 info->MCR &= ~UART_MCR_DTR;
2973
2974 outb(info->MCR, info->base + UART_MCR);
2975 spin_unlock_irqrestore(&info->slock, flags);
2976 return 0;
2977}
2978
2979
2980static int mxser_read_register(int, unsigned short *);
2981static int mxser_program_mode(int);
2982static void mxser_normal_mode(int);
2983
2984static 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;
2989
2990 hwconf->IsMoxaMustChipFlag = MOXA_OTHER_UART;
2991
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;
3013
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 }
3033
3034 if (!irq)
3035 return MXSER_ERR_IRQ;
3036 hwconf->irq = ((int)(irq & 0xF000) >> 12);
3037 for (i = 0; i < 8; i++)
3038 hwconf->ioaddr[i] = (int) regs[i + 1] & 0xFFF8;
3039 if ((regs[12] & 0x80) == 0)
3040 return MXSER_ERR_VECTOR;
3041 hwconf->vector = (int)regs[11]; /* interrupt vector */
3042 if (id == 1)
3043 hwconf->vector_mask = 0x00FF;
3044 else
3045 hwconf->vector_mask = 0x000F;
3046 for (i = 7, bits = 0x0100; i >= 0; i--, bits <<= 1) {
3047 if (regs[12] & bits) {
3048 hwconf->baud_base[i] = 921600;
3049 hwconf->MaxCanSetBaudRate[i] = 921600; /* add by Victor Yu. 09-04-2002 */
3050 } else {
3051 hwconf->baud_base[i] = 115200;
3052 hwconf->MaxCanSetBaudRate[i] = 115200; /* add by Victor Yu. 09-04-2002 */
3053 }
3054 }
3055 scratch2 = inb(cap + UART_LCR) & (~UART_LCR_DLAB);
3056 outb(scratch2 | UART_LCR_DLAB, cap + UART_LCR);
3057 outb(0, cap + UART_EFR); /* EFR is the same as FCR */
3058 outb(scratch2, cap + UART_LCR);
3059 outb(UART_FCR_ENABLE_FIFO, cap + UART_FCR);
3060 scratch = inb(cap + UART_IIR);
3061
3062 if (scratch & 0xC0)
3063 hwconf->uart_type = PORT_16550A;
3064 else
3065 hwconf->uart_type = PORT_16450;
3066 if (id == 1)
3067 hwconf->ports = 8;
3068 else
3069 hwconf->ports = 4;
3070 request_region(hwconf->ioaddr[0], 8 * hwconf->ports, "mxser(IO)");
3071 request_region(hwconf->vector, 1, "mxser(vector)");
3072 return hwconf->ports;
3073}
3074
3075#define CHIP_SK 0x01 /* Serial Data Clock in Eprom */
3076#define CHIP_DO 0x02 /* Serial Data Output in Eprom */
3077#define CHIP_CS 0x04 /* Serial Chip Select in Eprom */
3078#define CHIP_DI 0x08 /* Serial Data Input in Eprom */
3079#define EN_CCMD 0x000 /* Chip's command register */
3080#define EN0_RSARLO 0x008 /* Remote start address reg 0 */
3081#define EN0_RSARHI 0x009 /* Remote start address reg 1 */
3082#define EN0_RCNTLO 0x00A /* Remote byte count reg WR */
3083#define EN0_RCNTHI 0x00B /* Remote byte count reg WR */
3084#define EN0_DCFG 0x00E /* Data configuration reg WR */
3085#define EN0_PORT 0x010 /* Rcv missed frame error counter RD */
3086#define ENC_PAGE0 0x000 /* Select page 0 of chip registers */
3087#define ENC_PAGE3 0x0C0 /* Select page 3 of chip registers */
3088static int mxser_read_register(int port, unsigned short *regs)
3089{
3090 int i, k, value, id;
3091 unsigned int j;
3092
3093 id = mxser_program_mode(port);
3094 if (id < 0)
3095 return id;
3096 for (i = 0; i < 14; i++) {
3097 k = (i & 0x3F) | 0x180;
3098 for (j = 0x100; j > 0; j >>= 1) {
3099 outb(CHIP_CS, port);
3100 if (k & j) {
3101 outb(CHIP_CS | CHIP_DO, port);
3102 outb(CHIP_CS | CHIP_DO | CHIP_SK, port); /* A? bit of read */
3103 } else {
3104 outb(CHIP_CS, port);
3105 outb(CHIP_CS | CHIP_SK, port); /* A? bit of read */
3106 }
3107 }
3108 (void)inb(port);
3109 value = 0;
3110 for (k = 0, j = 0x8000; k < 16; k++, j >>= 1) {
3111 outb(CHIP_CS, port);
3112 outb(CHIP_CS | CHIP_SK, port);
3113 if (inb(port) & CHIP_DI)
3114 value |= j;
3115 }
3116 regs[i] = value;
3117 outb(0, port);
3118 }
3119 mxser_normal_mode(port);
3120 return id;
3121}
3122
3123static int mxser_program_mode(int port)
3124{
3125 int id, i, j, n;
3126 /* unsigned long flags; */
3127
3128 spin_lock(&gm_lock);
3129 outb(0, port);
3130 outb(0, port);
3131 outb(0, port);
3132 (void)inb(port);
3133 (void)inb(port);
3134 outb(0, port);
3135 (void)inb(port);
3136 /* restore_flags(flags); */
3137 spin_unlock(&gm_lock);
3138
3139 id = inb(port + 1) & 0x1F;
3140 if ((id != C168_ASIC_ID) &&
3141 (id != C104_ASIC_ID) &&
3142 (id != C102_ASIC_ID) &&
3143 (id != CI132_ASIC_ID) &&
3144 (id != CI134_ASIC_ID) &&
3145 (id != CI104J_ASIC_ID))
3146 return -1;
3147 for (i = 0, j = 0; i < 4; i++) {
3148 n = inb(port + 2);
3149 if (n == 'M') {
3150 j = 1;
3151 } else if ((j == 1) && (n == 1)) {
3152 j = 2;
3153 break;
3154 } else
3155 j = 0;
3156 }
3157 if (j != 2)
3158 id = -2;
3159 return id;
3160}
3161
3162static void mxser_normal_mode(int port)
3163{
3164 int i, n;
3165
3166 outb(0xA5, port + 1);
3167 outb(0x80, port + 3);
3168 outb(12, port + 0); /* 9600 bps */
3169 outb(0, port + 1);
3170 outb(0x03, port + 3); /* 8 data bits */
3171 outb(0x13, port + 4); /* loop back mode */
3172 for (i = 0; i < 16; i++) {
3173 n = inb(port + 5);
3174 if ((n & 0x61) == 0x60)
3175 break;
3176 if ((n & 1) == 1)
3177 (void)inb(port);
3178 }
3179 outb(0x00, port + 4);
3180}
3181
3182module_init(mxser_module_init);
3183module_exit(mxser_module_exit);
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-14 11:36:12 -0500