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Import 2.4.0-test2pre7
[davej-history.git] / drivers / char / serial.c
blob6ccf63d8433448625fbeb8f8e6f9f230de8fd76e
1 /*
2 * linux/drivers/char/serial.c
3 *
4 * Copyright (C) 1991, 1992 Linus Torvalds
5 * Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997,
6 * 1998, 1999 Theodore Ts'o
7 *
8 * Extensively rewritten by Theodore Ts'o, 8/16/92 -- 9/14/92. Now
9 * much more extensible to support other serial cards based on the
10 * 16450/16550A UART's. Added support for the AST FourPort and the
11 * Accent Async board.
12 *
13 * set_serial_info fixed to set the flags, custom divisor, and uart
14 * type fields. Fix suggested by Michael K. Johnson 12/12/92.
15 *
16 * 11/95: TIOCMIWAIT, TIOCGICOUNT by Angelo Haritsis <ah@doc.ic.ac.uk>
17 *
18 * 03/96: Modularised by Angelo Haritsis <ah@doc.ic.ac.uk>
19 *
20 * rs_set_termios fixed to look also for changes of the input
21 * flags INPCK, BRKINT, PARMRK, IGNPAR and IGNBRK.
22 * Bernd Anhäupl 05/17/96.
23 *
24 * 1/97: Extended dumb serial ports are a config option now.
25 * Saves 4k. Michael A. Griffith <grif@acm.org>
26 *
27 * 8/97: Fix bug in rs_set_termios with RTS
28 * Stanislav V. Voronyi <stas@uanet.kharkov.ua>
29 *
30 * 3/98: Change the IRQ detection, use of probe_irq_o*(),
31 * supress TIOCSERGWILD and TIOCSERSWILD
32 * Etienne Lorrain <etienne.lorrain@ibm.net>
33 *
34 * 4/98: Added changes to support the ARM architecture proposed by
35 * Russell King
36 *
37 * 5/99: Updated to include support for the XR16C850 and ST16C654
38 * uarts. Stuart MacDonald <stuartm@connecttech.com>
39 *
40 * 8/99: Generalized PCI support added. Theodore Ts'o
41 *
42 * 3/00: Rid circular buffer of redundant xmit_cnt. Fix a
43 * few races on freeing buffers too.
44 * Alan Modra <alan@linuxcare.com>
45 *
46 * 5/00: Support for the RSA-DV II/S card added.
47 * Kiyokazu SUTO <suto@ks-and-ks.ne.jp>
48 *
49 * This module exports the following rs232 io functions:
50 *
51 * int rs_init(void);
52 */
53
54 static char *serial_version = "5.01";
55 static char *serial_revdate = "2000-05-29";
56
57 /*
58 * Serial driver configuration section. Here are the various options:
59 *
60 * CONFIG_HUB6
61 * Enables support for the venerable Bell Technologies
62 * HUB6 card.
63 *
64 * CONFIG_SERIAL_MANY_PORTS
65 * Enables support for ports beyond the standard, stupid
66 * COM 1/2/3/4.
67 *
68 * CONFIG_SERIAL_MULTIPORT
69 * Enables support for special multiport board support.
70 *
71 * CONFIG_SERIAL_SHARE_IRQ
72 * Enables support for multiple serial ports on one IRQ
73 *
74 * CONFIG_SERIAL_DETECT_IRQ
75 * Enable the autodetection of IRQ on standart ports
76 *
77 * SERIAL_PARANOIA_CHECK
78 * Check the magic number for the async_structure where
79 * ever possible.
80 */
81
82 #include <linux/config.h>
83 #include <linux/version.h>
84
85 #undef SERIAL_PARANOIA_CHECK
86 #define CONFIG_SERIAL_NOPAUSE_IO
87 #define SERIAL_DO_RESTART
88
89 #if 0
90 /* These defines are normally controlled by the autoconf.h */
91 #define CONFIG_SERIAL_MANY_PORTS
92 #define CONFIG_SERIAL_SHARE_IRQ
93 #define CONFIG_SERIAL_DETECT_IRQ
94 #define CONFIG_SERIAL_MULTIPORT
95 #define CONFIG_HUB6
96 #endif
97
98 #ifdef CONFIG_PCI
99 #define ENABLE_SERIAL_PCI
100 #ifndef CONFIG_SERIAL_SHARE_IRQ
101 #define CONFIG_SERIAL_SHARE_IRQ
102 #endif
103 #ifndef CONFIG_SERIAL_MANY_PORTS
104 #define CONFIG_SERIAL_MANY_PORTS
105 #endif
106 #endif
107
108 #if defined(CONFIG_ISAPNP)|| (defined(CONFIG_ISAPNP_MODULE) && defined(MODULE))
109 #ifndef ENABLE_SERIAL_PNP
110 #define ENABLE_SERIAL_PNP
111 #endif
112 #endif
113
114 /* Set of debugging defines */
115
116 #undef SERIAL_DEBUG_INTR
117 #undef SERIAL_DEBUG_OPEN
118 #undef SERIAL_DEBUG_FLOW
119 #undef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
120 #undef SERIAL_DEBUG_PCI
121 #undef SERIAL_DEBUG_AUTOCONF
122
123 /* Sanity checks */
124
125 #ifdef CONFIG_SERIAL_MULTIPORT
126 #ifndef CONFIG_SERIAL_SHARE_IRQ
127 #define CONFIG_SERIAL_SHARE_IRQ
128 #endif
129 #endif
130
131 #ifdef CONFIG_HUB6
132 #ifndef CONFIG_SERIAL_MANY_PORTS
133 #define CONFIG_SERIAL_MANY_PORTS
134 #endif
135 #ifndef CONFIG_SERIAL_SHARE_IRQ
136 #define CONFIG_SERIAL_SHARE_IRQ
137 #endif
138 #endif
139
140 #define CONFIG_SERIAL_RSA
141
142 #define RS_STROBE_TIME (10*HZ)
143 #define RS_ISR_PASS_LIMIT 256
144
145 #if defined(__i386__) && (defined(CONFIG_M386) || defined(CONFIG_M486))
146 #define SERIAL_INLINE
147 #endif
148
149 /*
150 * End of serial driver configuration section.
151 */
152
153 #ifdef MODVERSIONS
154 #include <linux/modversions.h>
155 #endif
156 #include <linux/module.h>
157
158 #include <linux/types.h>
159 #ifdef LOCAL_HEADERS
160 #include "serial_local.h"
161 #else
162 #include <linux/serial.h>
163 #include <linux/serialP.h>
164 #include <linux/serial_reg.h>
165 #include <asm/serial.h>
166 #define LOCAL_VERSTRING ""
167 #endif
168
169 #include <linux/errno.h>
170 #include <linux/signal.h>
171 #include <linux/sched.h>
172 #include <linux/timer.h>
173 #include <linux/interrupt.h>
174 #include <linux/tty.h>
175 #include <linux/tty_flip.h>
176 #include <linux/major.h>
177 #include <linux/string.h>
178 #include <linux/fcntl.h>
179 #include <linux/ptrace.h>
180 #include <linux/ioport.h>
181 #include <linux/mm.h>
182 #include <linux/malloc.h>
183 #if (LINUX_VERSION_CODE >= 131343)
184 #include <linux/init.h>
185 #endif
186 #if (LINUX_VERSION_CODE >= 131336)
187 #include <asm/uaccess.h>
188 #endif
189 #include <linux/delay.h>
190 #ifdef CONFIG_SERIAL_CONSOLE
191 #include <linux/console.h>
192 #endif
193 #ifdef ENABLE_SERIAL_PCI
194 #include <linux/pci.h>
195 #endif
196 #ifdef ENABLE_SERIAL_PNP
197 #include <linux/isapnp.h>
198 #endif
199 #ifdef CONFIG_MAGIC_SYSRQ
200 #include <linux/sysrq.h>
201 #endif
202
203 /*
204 * All of the compatibilty code so we can compile serial.c against
205 * older kernels is hidden in serial_compat.h
206 */
207 #if defined(LOCAL_HEADERS) || (LINUX_VERSION_CODE < 0x020317) /* 2.3.23 */
208 #include "serial_compat.h"
209 #endif
210
211 #include <asm/system.h>
212 #include <asm/io.h>
213 #include <asm/irq.h>
214 #include <asm/bitops.h>
215
216 #ifdef CONFIG_MAC_SERIAL
217 #define SERIAL_DEV_OFFSET 2
218 #else
219 #define SERIAL_DEV_OFFSET 0
220 #endif
221
222 #ifdef SERIAL_INLINE
223 #define _INLINE_ inline
224 #else
225 #define _INLINE_
226 #endif
227
228 static char *serial_name = "Serial driver";
229
230 static DECLARE_TASK_QUEUE(tq_serial);
231
232 static struct tty_driver serial_driver, callout_driver;
233 static int serial_refcount;
234
235 /* serial subtype definitions */
236 #ifndef SERIAL_TYPE_NORMAL
237 #define SERIAL_TYPE_NORMAL 1
238 #define SERIAL_TYPE_CALLOUT 2
239 #endif
240
241 /* number of characters left in xmit buffer before we ask for more */
242 #define WAKEUP_CHARS 256
243
244 /*
245 * IRQ_timeout - How long the timeout should be for each IRQ
246 * should be after the IRQ has been active.
247 */
248
249 static struct async_struct *IRQ_ports[NR_IRQS];
250 #ifdef CONFIG_SERIAL_MULTIPORT
251 static struct rs_multiport_struct rs_multiport[NR_IRQS];
252 #endif
253 static int IRQ_timeout[NR_IRQS];
254 #ifdef CONFIG_SERIAL_CONSOLE
255 static struct console sercons;
256 static unsigned long break_pressed; /* break, really ... */
257 #endif
258
259 static unsigned detect_uart_irq (struct serial_state * state);
260 static void autoconfig(struct serial_state * state);
261 static void change_speed(struct async_struct *info, struct termios *old);
262 static void rs_wait_until_sent(struct tty_struct *tty, int timeout);
263
264 /*
265 * Here we define the default xmit fifo size used for each type of
266 * UART
267 */
268 static struct serial_uart_config uart_config[] = {
269 { "unknown", 1, 0 },
270 { "8250", 1, 0 },
271 { "16450", 1, 0 },
272 { "16550", 1, 0 },
273 { "16550A", 16, UART_CLEAR_FIFO | UART_USE_FIFO },
274 { "cirrus", 1, 0 }, /* usurped by cyclades.c */
275 { "ST16650", 1, UART_CLEAR_FIFO |UART_STARTECH },
276 { "ST16650V2", 32, UART_CLEAR_FIFO | UART_USE_FIFO |
277 UART_STARTECH },
278 { "TI16750", 64, UART_CLEAR_FIFO | UART_USE_FIFO},
279 { "Startech", 1, 0}, /* usurped by cyclades.c */
280 { "16C950/954", 128, UART_CLEAR_FIFO | UART_USE_FIFO},
281 { "ST16654", 64, UART_CLEAR_FIFO | UART_USE_FIFO |
282 UART_STARTECH },
283 { "XR16850", 128, UART_CLEAR_FIFO | UART_USE_FIFO |
284 UART_STARTECH },
285 { "RSA", 2048, UART_CLEAR_FIFO | UART_USE_FIFO },
286 { 0, 0}
287 };
288
289 #if defined(CONFIG_SERIAL_RSA) && defined(MODULE)
290
291 #define PORT_RSA_MAX 4
292 static int probe_rsa[PORT_RSA_MAX];
293 static int force_rsa[PORT_RSA_MAX];
294
295 MODULE_PARM(probe_rsa, "1-" __MODULE_STRING(PORT_RSA_MAX) "i");
296 MODULE_PARM(force_rsa, "1-" __MODULE_STRING(PORT_RSA_MAX) "i");
297 #endif /* CONFIG_SERIAL_RSA */
298
299 static struct serial_state rs_table[RS_TABLE_SIZE] = {
300 SERIAL_PORT_DFNS /* Defined in serial.h */
301 };
302
303 #define NR_PORTS (sizeof(rs_table)/sizeof(struct serial_state))
304
305 #if (defined(ENABLE_SERIAL_PCI) || defined(ENABLE_SERIAL_PNP))
306 #define NR_PCI_BOARDS 8
307 #ifdef MODULE
308 /* We don't unregister PCI boards right now */
309 static struct pci_board_inst serial_pci_board[NR_PCI_BOARDS];
310 static int serial_pci_board_idx = 0;
311 #endif
312 #ifndef IS_PCI_REGION_IOPORT
313 #define IS_PCI_REGION_IOPORT(dev, r) (pci_resource_flags((dev), (r)) & \
314 IORESOURCE_IO)
315 #endif
316 #ifndef PCI_IRQ_RESOURCE
317 #define PCI_IRQ_RESOURCE(dev, r) ((dev)->irq_resource[r].start)
318 #endif
319 #ifndef pci_get_subvendor
320 #define pci_get_subvendor(dev) ((dev)->subsystem_vendor)
321 #define pci_get_subdevice(dev) ((dev)->subsystem_device)
322 #endif
323 #endif /* ENABLE_SERIAL_PCI || ENABLE_SERIAL_PNP */
324
325 #ifndef PREPARE_FUNC
326 #define PREPARE_FUNC(dev) (dev->prepare)
327 #define ACTIVATE_FUNC(dev) (dev->activate)
328 #define DEACTIVATE_FUNC(dev) (dev->deactivate)
329 #endif
330
331 #define HIGH_BITS_OFFSET ((sizeof(long)-sizeof(int))*8)
332
333 static struct tty_struct *serial_table[NR_PORTS];
334 static struct termios *serial_termios[NR_PORTS];
335 static struct termios *serial_termios_locked[NR_PORTS];
336
337
338 #if defined(MODULE) && defined(SERIAL_DEBUG_MCOUNT)
339 #define DBG_CNT(s) printk("(%s): [%x] refc=%d, serc=%d, ttyc=%d -> %s\n", \
340 kdevname(tty->device), (info->flags), serial_refcount,info->count,tty->count,s)
341 #else
342 #define DBG_CNT(s)
343 #endif
344
345 /*
346 * tmp_buf is used as a temporary buffer by serial_write. We need to
347 * lock it in case the copy_from_user blocks while swapping in a page,
348 * and some other program tries to do a serial write at the same time.
349 * Since the lock will only come under contention when the system is
350 * swapping and available memory is low, it makes sense to share one
351 * buffer across all the serial ports, since it significantly saves
352 * memory if large numbers of serial ports are open.
353 */
354 static unsigned char *tmp_buf;
355 #ifdef DECLARE_MUTEX
356 static DECLARE_MUTEX(tmp_buf_sem);
357 #else
358 static struct semaphore tmp_buf_sem = MUTEX;
359 #endif
360
361
362 static inline int serial_paranoia_check(struct async_struct *info,
363 kdev_t device, const char *routine)
364 {
365 #ifdef SERIAL_PARANOIA_CHECK
366 static const char *badmagic =
367 "Warning: bad magic number for serial struct (%s) in %s\n";
368 static const char *badinfo =
369 "Warning: null async_struct for (%s) in %s\n";
370
371 if (!info) {
372 printk(badinfo, kdevname(device), routine);
373 return 1;
374 }
375 if (info->magic != SERIAL_MAGIC) {
376 printk(badmagic, kdevname(device), routine);
377 return 1;
378 }
379 #endif
380 return 0;
381 }
382
383 static _INLINE_ unsigned int serial_in(struct async_struct *info, int offset)
384 {
385 switch (info->io_type) {
386 #ifdef CONFIG_HUB6
387 case SERIAL_IO_HUB6:
388 outb(info->hub6 - 1 + offset, info->port);
389 return inb(info->port+1);
390 #endif
391 case SERIAL_IO_MEM:
392 return readb((unsigned long) info->iomem_base +
393 (offset<<info->iomem_reg_shift));
394 #ifdef CONFIG_SERIAL_GSC
395 case SERIAL_IO_GSC:
396 return gsc_readb(info->iomem_base + offset);
397 #endif
398 default:
399 return inb(info->port + offset);
400 }
401 }
402
403 static _INLINE_ void serial_out(struct async_struct *info, int offset,
404 int value)
405 {
406 switch (info->io_type) {
407 #ifdef CONFIG_HUB6
408 case SERIAL_IO_HUB6:
409 outb(info->hub6 - 1 + offset, info->port);
410 outb(value, info->port+1);
411 break;
412 #endif
413 case SERIAL_IO_MEM:
414 writeb(value, (unsigned long) info->iomem_base +
415 (offset<<info->iomem_reg_shift));
416 break;
417 #ifdef CONFIG_SERIAL_GSC
418 case SERIAL_IO_GSC:
419 gsc_writeb(value, info->iomem_base + offset);
420 break;
421 #endif
422 default:
423 outb(value, info->port+offset);
424 }
425 }
426
427 /*
428 * We used to support using pause I/O for certain machines. We
429 * haven't supported this for a while, but just in case it's badly
430 * needed for certain old 386 machines, I've left these #define's
431 * in....
432 */
433 #define serial_inp(info, offset) serial_in(info, offset)
434 #define serial_outp(info, offset, value) serial_out(info, offset, value)
435
436
437 /*
438 * For the 16C950
439 */
440 void serial_icr_write(struct async_struct *info, int offset, int value)
441 {
442 serial_out(info, UART_SCR, offset);
443 serial_out(info, UART_ICR, value);
444 }
445
446 unsigned int serial_icr_read(struct async_struct *info, int offset)
447 {
448 int value;
449
450 serial_icr_write(info, UART_ACR, info->ACR | UART_ACR_ICRRD);
451 serial_out(info, UART_SCR, offset);
452 value = serial_in(info, UART_ICR);
453 serial_icr_write(info, UART_ACR, info->ACR);
454 return value;
455 }
456
457 /*
458 * ------------------------------------------------------------
459 * rs_stop() and rs_start()
460 *
461 * This routines are called before setting or resetting tty->stopped.
462 * They enable or disable transmitter interrupts, as necessary.
463 * ------------------------------------------------------------
464 */
465 static void rs_stop(struct tty_struct *tty)
466 {
467 struct async_struct *info = (struct async_struct *)tty->driver_data;
468 unsigned long flags;
469
470 if (serial_paranoia_check(info, tty->device, "rs_stop"))
471 return;
472
473 save_flags(flags); cli();
474 if (info->IER & UART_IER_THRI) {
475 info->IER &= ~UART_IER_THRI;
476 serial_out(info, UART_IER, info->IER);
477 }
478 if (info->state->type == PORT_16C950) {
479 info->ACR |= UART_ACR_TXDIS;
480 serial_icr_write(info, UART_ACR, info->ACR);
481 }
482 restore_flags(flags);
483 }
484
485 static void rs_start(struct tty_struct *tty)
486 {
487 struct async_struct *info = (struct async_struct *)tty->driver_data;
488 unsigned long flags;
489
490 if (serial_paranoia_check(info, tty->device, "rs_start"))
491 return;
492
493 save_flags(flags); cli();
494 if (info->xmit.head != info->xmit.tail
495 && info->xmit.buf
496 && !(info->IER & UART_IER_THRI)) {
497 info->IER |= UART_IER_THRI;
498 serial_out(info, UART_IER, info->IER);
499 }
500 if (info->state->type == PORT_16C950) {
501 info->ACR &= ~UART_ACR_TXDIS;
502 serial_icr_write(info, UART_ACR, info->ACR);
503 }
504 restore_flags(flags);
505 }
506
507 /*
508 * ----------------------------------------------------------------------
509 *
510 * Here starts the interrupt handling routines. All of the following
511 * subroutines are declared as inline and are folded into
512 * rs_interrupt(). They were separated out for readability's sake.
513 *
514 * Note: rs_interrupt() is a "fast" interrupt, which means that it
515 * runs with interrupts turned off. People who may want to modify
516 * rs_interrupt() should try to keep the interrupt handler as fast as
517 * possible. After you are done making modifications, it is not a bad
518 * idea to do:
519 *
520 * gcc -S -DKERNEL -Wall -Wstrict-prototypes -O6 -fomit-frame-pointer serial.c
521 *
522 * and look at the resulting assemble code in serial.s.
523 *
524 * - Ted Ts'o (tytso@mit.edu), 7-Mar-93
525 * -----------------------------------------------------------------------
526 */
527
528 /*
529 * This routine is used by the interrupt handler to schedule
530 * processing in the software interrupt portion of the driver.
531 */
532 static _INLINE_ void rs_sched_event(struct async_struct *info,
533 int event)
534 {
535 info->event |= 1 << event;
536 queue_task(&info->tqueue, &tq_serial);
537 mark_bh(SERIAL_BH);
538 }
539
540 static _INLINE_ void receive_chars(struct async_struct *info,
541 int *status, struct pt_regs * regs)
542 {
543 struct tty_struct *tty = info->tty;
544 unsigned char ch;
545 int ignored = 0;
546 struct async_icount *icount;
547
548 icount = &info->state->icount;
549 do {
550 ch = serial_inp(info, UART_RX);
551 if (tty->flip.count >= TTY_FLIPBUF_SIZE)
552 goto ignore_char;
553 *tty->flip.char_buf_ptr = ch;
554 icount->rx++;
555
556 #ifdef SERIAL_DEBUG_INTR
557 printk("DR%02x:%02x...", ch, *status);
558 #endif
559 *tty->flip.flag_buf_ptr = 0;
560 if (*status & (UART_LSR_BI | UART_LSR_PE |
561 UART_LSR_FE | UART_LSR_OE)) {
562 /*
563 * For statistics only
564 */
565 if (*status & UART_LSR_BI) {
566 *status &= ~(UART_LSR_FE | UART_LSR_PE);
567 icount->brk++;
568 } else if (*status & UART_LSR_PE)
569 icount->parity++;
570 else if (*status & UART_LSR_FE)
571 icount->frame++;
572 if (*status & UART_LSR_OE)
573 icount->overrun++;
574
575 /*
576 * Now check to see if character should be
577 * ignored, and mask off conditions which
578 * should be ignored.
579 */
580 if (*status & info->ignore_status_mask) {
581 if (++ignored > 100)
582 break;
583 goto ignore_char;
584 }
585 *status &= info->read_status_mask;
586
587 if (*status & (UART_LSR_BI)) {
588 #ifdef SERIAL_DEBUG_INTR
589 printk("handling break....");
590 #endif
591 #if defined(CONFIG_SERIAL_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) && !defined(MODULE)
592 if (info->line == sercons.index) {
593 if (!break_pressed) {
594 break_pressed = jiffies;
595 goto ignore_char;
596 }
597 break_pressed = 0;
598 }
599 #endif
600 *tty->flip.flag_buf_ptr = TTY_BREAK;
601 if (info->flags & ASYNC_SAK)
602 do_SAK(tty);
603 } else if (*status & UART_LSR_PE)
604 *tty->flip.flag_buf_ptr = TTY_PARITY;
605 else if (*status & UART_LSR_FE)
606 *tty->flip.flag_buf_ptr = TTY_FRAME;
607 if (*status & UART_LSR_OE) {
608 /*
609 * Overrun is special, since it's
610 * reported immediately, and doesn't
611 * affect the current character
612 */
613 tty->flip.count++;
614 tty->flip.flag_buf_ptr++;
615 tty->flip.char_buf_ptr++;
616 *tty->flip.flag_buf_ptr = TTY_OVERRUN;
617 if (tty->flip.count >= TTY_FLIPBUF_SIZE)
618 goto ignore_char;
619 }
620 }
621 #if defined(CONFIG_SERIAL_CONSOLE) && defined(CONFIG_MAGIC_SYSRQ) && !defined(MODULE)
622 if (break_pressed && info->line == sercons.index) {
623 if (ch != 0 &&
624 time_before(jiffies, break_pressed + HZ*5)) {
625 handle_sysrq(ch, regs, NULL, NULL);
626 break_pressed = 0;
627 goto ignore_char;
628 }
629 break_pressed = 0;
630 }
631 #endif
632 tty->flip.flag_buf_ptr++;
633 tty->flip.char_buf_ptr++;
634 tty->flip.count++;
635 ignore_char:
636 *status = serial_inp(info, UART_LSR);
637 } while (*status & UART_LSR_DR);
638 #if (LINUX_VERSION_CODE > 131394) /* 2.1.66 */
639 tty_flip_buffer_push(tty);
640 #else
641 queue_task_irq_off(&tty->flip.tqueue, &tq_timer);
642 #endif
643 }
644
645 static _INLINE_ void transmit_chars(struct async_struct *info, int *intr_done)
646 {
647 int count;
648
649 if (info->x_char) {
650 serial_outp(info, UART_TX, info->x_char);
651 info->state->icount.tx++;
652 info->x_char = 0;
653 if (intr_done)
654 *intr_done = 0;
655 return;
656 }
657 if (info->xmit.head == info->xmit.tail
658 || info->tty->stopped
659 || info->tty->hw_stopped) {
660 info->IER &= ~UART_IER_THRI;
661 serial_out(info, UART_IER, info->IER);
662 return;
663 }
664
665 count = info->xmit_fifo_size;
666 do {
667 serial_out(info, UART_TX, info->xmit.buf[info->xmit.tail]);
668 info->xmit.tail = (info->xmit.tail + 1) & (SERIAL_XMIT_SIZE-1);
669 info->state->icount.tx++;
670 if (info->xmit.head == info->xmit.tail)
671 break;
672 } while (--count > 0);
673
674 if (CIRC_CNT(info->xmit.head,
675 info->xmit.tail,
676 SERIAL_XMIT_SIZE) < WAKEUP_CHARS)
677 rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
678
679 #ifdef SERIAL_DEBUG_INTR
680 printk("THRE...");
681 #endif
682 if (intr_done)
683 *intr_done = 0;
684
685 if (info->xmit.head == info->xmit.tail) {
686 info->IER &= ~UART_IER_THRI;
687 serial_out(info, UART_IER, info->IER);
688 }
689 }
690
691 static _INLINE_ void check_modem_status(struct async_struct *info)
692 {
693 int status;
694 struct async_icount *icount;
695
696 status = serial_in(info, UART_MSR);
697
698 if (status & UART_MSR_ANY_DELTA) {
699 icount = &info->state->icount;
700 /* update input line counters */
701 if (status & UART_MSR_TERI)
702 icount->rng++;
703 if (status & UART_MSR_DDSR)
704 icount->dsr++;
705 if (status & UART_MSR_DDCD) {
706 icount->dcd++;
707 #ifdef CONFIG_HARD_PPS
708 if ((info->flags & ASYNC_HARDPPS_CD) &&
709 (status & UART_MSR_DCD))
710 hardpps();
711 #endif
712 }
713 if (status & UART_MSR_DCTS)
714 icount->cts++;
715 wake_up_interruptible(&info->delta_msr_wait);
716 }
717
718 if ((info->flags & ASYNC_CHECK_CD) && (status & UART_MSR_DDCD)) {
719 #if (defined(SERIAL_DEBUG_OPEN) || defined(SERIAL_DEBUG_INTR))
720 printk("ttys%d CD now %s...", info->line,
721 (status & UART_MSR_DCD) ? "on" : "off");
722 #endif
723 if (status & UART_MSR_DCD)
724 wake_up_interruptible(&info->open_wait);
725 else if (!((info->flags & ASYNC_CALLOUT_ACTIVE) &&
726 (info->flags & ASYNC_CALLOUT_NOHUP))) {
727 #ifdef SERIAL_DEBUG_OPEN
728 printk("doing serial hangup...");
729 #endif
730 if (info->tty)
731 tty_hangup(info->tty);
732 }
733 }
734 if (info->flags & ASYNC_CTS_FLOW) {
735 if (info->tty->hw_stopped) {
736 if (status & UART_MSR_CTS) {
737 #if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
738 printk("CTS tx start...");
739 #endif
740 info->tty->hw_stopped = 0;
741 info->IER |= UART_IER_THRI;
742 serial_out(info, UART_IER, info->IER);
743 rs_sched_event(info, RS_EVENT_WRITE_WAKEUP);
744 return;
745 }
746 } else {
747 if (!(status & UART_MSR_CTS)) {
748 #if (defined(SERIAL_DEBUG_INTR) || defined(SERIAL_DEBUG_FLOW))
749 printk("CTS tx stop...");
750 #endif
751 info->tty->hw_stopped = 1;
752 info->IER &= ~UART_IER_THRI;
753 serial_out(info, UART_IER, info->IER);
754 }
755 }
756 }
757 }
758
759 #ifdef CONFIG_SERIAL_SHARE_IRQ
760 /*
761 * This is the serial driver's generic interrupt routine
762 */
763 static void rs_interrupt(int irq, void *dev_id, struct pt_regs * regs)
764 {
765 int status;
766 struct async_struct * info;
767 int pass_counter = 0;
768 struct async_struct *end_mark = 0;
769 #ifdef CONFIG_SERIAL_MULTIPORT
770 int first_multi = 0;
771 struct rs_multiport_struct *multi;
772 #endif
773
774 #ifdef SERIAL_DEBUG_INTR
775 printk("rs_interrupt(%d)...", irq);
776 #endif
777
778 info = IRQ_ports[irq];
779 if (!info)
780 return;
781
782 #ifdef CONFIG_SERIAL_MULTIPORT
783 multi = &rs_multiport[irq];
784 if (multi->port_monitor)
785 first_multi = inb(multi->port_monitor);
786 #endif
787
788 do {
789 if (!info->tty ||
790 (serial_in(info, UART_IIR) & UART_IIR_NO_INT)) {
791 if (!end_mark)
792 end_mark = info;
793 goto next;
794 }
795 end_mark = 0;
796
797 info->last_active = jiffies;
798
799 status = serial_inp(info, UART_LSR);
800 #ifdef SERIAL_DEBUG_INTR
801 printk("status = %x...", status);
802 #endif
803 if (status & UART_LSR_DR)
804 receive_chars(info, &status, regs);
805 check_modem_status(info);
806 if (status & UART_LSR_THRE)
807 transmit_chars(info, 0);
808
809 next:
810 info = info->next_port;
811 if (!info) {
812 info = IRQ_ports[irq];
813 if (pass_counter++ > RS_ISR_PASS_LIMIT) {
814 #if 0
815 printk("rs loop break\n");
816 #endif
817 break; /* Prevent infinite loops */
818 }
819 continue;
820 }
821 } while (end_mark != info);
822 #ifdef CONFIG_SERIAL_MULTIPORT
823 if (multi->port_monitor)
824 printk("rs port monitor (normal) irq %d: 0x%x, 0x%x\n",
825 info->state->irq, first_multi,
826 inb(multi->port_monitor));
827 #endif
828 #ifdef SERIAL_DEBUG_INTR
829 printk("end.\n");
830 #endif
831 }
832 #endif /* #ifdef CONFIG_SERIAL_SHARE_IRQ */
833
834
835 /*
836 * This is the serial driver's interrupt routine for a single port
837 */
838 static void rs_interrupt_single(int irq, void *dev_id, struct pt_regs * regs)
839 {
840 int status;
841 int pass_counter = 0;
842 struct async_struct * info;
843 #ifdef CONFIG_SERIAL_MULTIPORT
844 int first_multi = 0;
845 struct rs_multiport_struct *multi;
846 #endif
847
848 #ifdef SERIAL_DEBUG_INTR
849 printk("rs_interrupt_single(%d)...", irq);
850 #endif
851
852 info = IRQ_ports[irq];
853 if (!info || !info->tty)
854 return;
855
856 #ifdef CONFIG_SERIAL_MULTIPORT
857 multi = &rs_multiport[irq];
858 if (multi->port_monitor)
859 first_multi = inb(multi->port_monitor);
860 #endif
861
862 do {
863 status = serial_inp(info, UART_LSR);
864 #ifdef SERIAL_DEBUG_INTR
865 printk("status = %x...", status);
866 #endif
867 if (status & UART_LSR_DR)
868 receive_chars(info, &status, regs);
869 check_modem_status(info);
870 if (status & UART_LSR_THRE)
871 transmit_chars(info, 0);
872 if (pass_counter++ > RS_ISR_PASS_LIMIT) {
873 #if 0
874 printk("rs_single loop break.\n");
875 #endif
876 break;
877 }
878 } while (!(serial_in(info, UART_IIR) & UART_IIR_NO_INT));
879 info->last_active = jiffies;
880 #ifdef CONFIG_SERIAL_MULTIPORT
881 if (multi->port_monitor)
882 printk("rs port monitor (single) irq %d: 0x%x, 0x%x\n",
883 info->state->irq, first_multi,
884 inb(multi->port_monitor));
885 #endif
886 #ifdef SERIAL_DEBUG_INTR
887 printk("end.\n");
888 #endif
889 }
890
891 #ifdef CONFIG_SERIAL_MULTIPORT
892 /*
893 * This is the serial driver's for multiport boards
894 */
895 static void rs_interrupt_multi(int irq, void *dev_id, struct pt_regs * regs)
896 {
897 int status;
898 struct async_struct * info;
899 int pass_counter = 0;
900 int first_multi= 0;
901 struct rs_multiport_struct *multi;
902
903 #ifdef SERIAL_DEBUG_INTR
904 printk("rs_interrupt_multi(%d)...", irq);
905 #endif
906
907 info = IRQ_ports[irq];
908 if (!info)
909 return;
910 multi = &rs_multiport[irq];
911 if (!multi->port1) {
912 /* Should never happen */
913 printk("rs_interrupt_multi: NULL port1!\n");
914 return;
915 }
916 if (multi->port_monitor)
917 first_multi = inb(multi->port_monitor);
918
919 while (1) {
920 if (!info->tty ||
921 (serial_in(info, UART_IIR) & UART_IIR_NO_INT))
922 goto next;
923
924 info->last_active = jiffies;
925
926 status = serial_inp(info, UART_LSR);
927 #ifdef SERIAL_DEBUG_INTR
928 printk("status = %x...", status);
929 #endif
930 if (status & UART_LSR_DR)
931 receive_chars(info, &status, regs);
932 check_modem_status(info);
933 if (status & UART_LSR_THRE)
934 transmit_chars(info, 0);
935
936 next:
937 info = info->next_port;
938 if (info)
939 continue;
940
941 info = IRQ_ports[irq];
942 /*
943 * The user was a bonehead, and misconfigured their
944 * multiport info. Rather than lock up the kernel
945 * in an infinite loop, if we loop too many times,
946 * print a message and break out of the loop.
947 */
948 if (pass_counter++ > RS_ISR_PASS_LIMIT) {
949 printk("Misconfigured multiport serial info "
950 "for irq %d. Breaking out irq loop\n", irq);
951 break;
952 }
953 if (multi->port_monitor)
954 printk("rs port monitor irq %d: 0x%x, 0x%x\n",
955 info->state->irq, first_multi,
956 inb(multi->port_monitor));
957 if ((inb(multi->port1) & multi->mask1) != multi->match1)
958 continue;
959 if (!multi->port2)
960 break;
961 if ((inb(multi->port2) & multi->mask2) != multi->match2)
962 continue;
963 if (!multi->port3)
964 break;
965 if ((inb(multi->port3) & multi->mask3) != multi->match3)
966 continue;
967 if (!multi->port4)
968 break;
969 if ((inb(multi->port4) & multi->mask4) != multi->match4)
970 continue;
971 break;
972 }
973 #ifdef SERIAL_DEBUG_INTR
974 printk("end.\n");
975 #endif
976 }
977 #endif
978
979 /*
980 * -------------------------------------------------------------------
981 * Here ends the serial interrupt routines.
982 * -------------------------------------------------------------------
983 */
984
985 /*
986 * This routine is used to handle the "bottom half" processing for the
987 * serial driver, known also the "software interrupt" processing.
988 * This processing is done at the kernel interrupt level, after the
989 * rs_interrupt() has returned, BUT WITH INTERRUPTS TURNED ON. This
990 * is where time-consuming activities which can not be done in the
991 * interrupt driver proper are done; the interrupt driver schedules
992 * them using rs_sched_event(), and they get done here.
993 */
994 static void do_serial_bh(void)
995 {
996 run_task_queue(&tq_serial);
997 }
998
999 static void do_softint(void *private_)
1000 {
1001 struct async_struct *info = (struct async_struct *) private_;
1002 struct tty_struct *tty;
1003
1004 tty = info->tty;
1005 if (!tty)
1006 return;
1007
1008 if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &info->event)) {
1009 if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
1010 tty->ldisc.write_wakeup)
1011 (tty->ldisc.write_wakeup)(tty);
1012 wake_up_interruptible(&tty->write_wait);
1013 #ifdef SERIAL_HAVE_POLL_WAIT
1014 wake_up_interruptible(&tty->poll_wait);
1015 #endif
1016 }
1017 }
1018
1019 /*
1020 * This subroutine is called when the RS_TIMER goes off. It is used
1021 * by the serial driver to handle ports that do not have an interrupt
1022 * (irq=0). This doesn't work very well for 16450's, but gives barely
1023 * passable results for a 16550A. (Although at the expense of much
1024 * CPU overhead).
1025 */
1026 static void rs_timer(void)
1027 {
1028 static unsigned long last_strobe = 0;
1029 struct async_struct *info;
1030 unsigned int i;
1031 unsigned long flags;
1032
1033 if ((jiffies - last_strobe) >= RS_STROBE_TIME) {
1034 for (i=0; i < NR_IRQS; i++) {
1035 info = IRQ_ports[i];
1036 if (!info)
1037 continue;
1038 save_flags(flags); cli();
1039 #ifdef CONFIG_SERIAL_SHARE_IRQ
1040 if (info->next_port) {
1041 do {
1042 serial_out(info, UART_IER, 0);
1043 info->IER |= UART_IER_THRI;
1044 serial_out(info, UART_IER, info->IER);
1045 info = info->next_port;
1046 } while (info);
1047 #ifdef CONFIG_SERIAL_MULTIPORT
1048 if (rs_multiport[i].port1)
1049 rs_interrupt_multi(i, NULL, NULL);
1050 else
1051 #endif
1052 rs_interrupt(i, NULL, NULL);
1053 } else
1054 #endif /* CONFIG_SERIAL_SHARE_IRQ */
1055 rs_interrupt_single(i, NULL, NULL);
1056 restore_flags(flags);
1057 }
1058 }
1059 last_strobe = jiffies;
1060 timer_table[RS_TIMER].expires = jiffies + RS_STROBE_TIME;
1061 timer_active |= 1 << RS_TIMER;
1062
1063 if (IRQ_ports[0]) {
1064 save_flags(flags); cli();
1065 #ifdef CONFIG_SERIAL_SHARE_IRQ
1066 rs_interrupt(0, NULL, NULL);
1067 #else
1068 rs_interrupt_single(0, NULL, NULL);
1069 #endif
1070 restore_flags(flags);
1071
1072 timer_table[RS_TIMER].expires = jiffies + IRQ_timeout[0] - 2;
1073 }
1074 }
1075
1076 /*
1077 * ---------------------------------------------------------------
1078 * Low level utility subroutines for the serial driver: routines to
1079 * figure out the appropriate timeout for an interrupt chain, routines
1080 * to initialize and startup a serial port, and routines to shutdown a
1081 * serial port. Useful stuff like that.
1082 * ---------------------------------------------------------------
1083 */
1084
1085 /*
1086 * This routine figures out the correct timeout for a particular IRQ.
1087 * It uses the smallest timeout of all of the serial ports in a
1088 * particular interrupt chain. Now only used for IRQ 0....
1089 */
1090 static void figure_IRQ_timeout(int irq)
1091 {
1092 struct async_struct *info;
1093 int timeout = 60*HZ; /* 60 seconds === a long time :-) */
1094
1095 info = IRQ_ports[irq];
1096 if (!info) {
1097 IRQ_timeout[irq] = 60*HZ;
1098 return;
1099 }
1100 while (info) {
1101 if (info->timeout < timeout)
1102 timeout = info->timeout;
1103 info = info->next_port;
1104 }
1105 if (!irq)
1106 timeout = timeout / 2;
1107 IRQ_timeout[irq] = timeout ? timeout : 1;
1108 }
1109
1110 #ifdef CONFIG_SERIAL_RSA
1111 /* Attempts to turn on the RSA FIFO. Returns zero on failure */
1112 static int enable_rsa(struct async_struct *info)
1113 {
1114 unsigned char mode;
1115 int result;
1116 unsigned long flags;
1117
1118 save_flags(flags); cli();
1119 mode = serial_inp(info, UART_RSA_MSR);
1120 result = mode & UART_RSA_MSR_FIFO;
1121
1122 if (!result) {
1123 serial_outp(info, UART_RSA_MSR, mode | UART_RSA_MSR_FIFO);
1124 mode = serial_inp(info, UART_RSA_MSR);
1125 result = mode & UART_RSA_MSR_FIFO;
1126 }
1127
1128 restore_flags(flags);
1129 return result;
1130 }
1131
1132 /* Attempts to turn off the RSA FIFO. Returns zero on failure */
1133 static int disable_rsa(struct async_struct *info)
1134 {
1135 unsigned char mode;
1136 int result;
1137 unsigned long flags;
1138
1139 save_flags(flags); cli();
1140 mode = serial_inp(info, UART_RSA_MSR);
1141 result = !(mode & UART_RSA_MSR_FIFO);
1142
1143 if (!result) {
1144 serial_outp(info, UART_RSA_MSR, mode & ~UART_RSA_MSR_FIFO);
1145 mode = serial_inp(info, UART_RSA_MSR);
1146 result = !(mode & UART_RSA_MSR_FIFO);
1147 }
1148
1149 restore_flags(flags);
1150 return result;
1151 }
1152 #endif /* CONFIG_SERIAL_RSA */
1153
1154 static int startup(struct async_struct * info)
1155 {
1156 unsigned long flags;
1157 int retval=0;
1158 void (*handler)(int, void *, struct pt_regs *);
1159 struct serial_state *state= info->state;
1160 unsigned long page;
1161 #ifdef CONFIG_SERIAL_MANY_PORTS
1162 unsigned short ICP;
1163 #endif
1164
1165 page = get_zeroed_page(GFP_KERNEL);
1166 if (!page)
1167 return -ENOMEM;
1168
1169 save_flags(flags); cli();
1170
1171 if (info->flags & ASYNC_INITIALIZED) {
1172 free_page(page);
1173 goto errout;
1174 }
1175
1176 if (!CONFIGURED_SERIAL_PORT(state) || !state->type) {
1177 if (info->tty)
1178 set_bit(TTY_IO_ERROR, &info->tty->flags);
1179 free_page(page);
1180 goto errout;
1181 }
1182 if (info->xmit.buf)
1183 free_page(page);
1184 else
1185 info->xmit.buf = (unsigned char *) page;
1186
1187 #ifdef SERIAL_DEBUG_OPEN
1188 printk("starting up ttys%d (irq %d)...", info->line, state->irq);
1189 #endif
1190
1191 if (uart_config[state->type].flags & UART_STARTECH) {
1192 /* Wake up UART */
1193 serial_outp(info, UART_LCR, 0xBF);
1194 serial_outp(info, UART_EFR, UART_EFR_ECB);
1195 /*
1196 * Turn off LCR == 0xBF so we actually set the IER
1197 * register on the XR16C850
1198 */
1199 serial_outp(info, UART_LCR, 0);
1200 serial_outp(info, UART_IER, 0);
1201 /*
1202 * Now reset LCR so we can turn off the ECB bit
1203 */
1204 serial_outp(info, UART_LCR, 0xBF);
1205 serial_outp(info, UART_EFR, 0);
1206 /*
1207 * For a XR16C850, we need to set the trigger levels
1208 */
1209 if (state->type == PORT_16850) {
1210 serial_outp(info, UART_FCTR, UART_FCTR_TRGD |
1211 UART_FCTR_RX);
1212 serial_outp(info, UART_TRG, UART_TRG_96);
1213 serial_outp(info, UART_FCTR, UART_FCTR_TRGD |
1214 UART_FCTR_TX);
1215 serial_outp(info, UART_TRG, UART_TRG_96);
1216 }
1217 serial_outp(info, UART_LCR, 0);
1218 }
1219
1220 if (state->type == PORT_16750) {
1221 /* Wake up UART */
1222 serial_outp(info, UART_IER, 0);
1223 }
1224
1225 if (state->type == PORT_16C950) {
1226 /* Wake up and initialize UART */
1227 info->ACR = 0;
1228 serial_outp(info, UART_LCR, 0xBF);
1229 serial_outp(info, UART_EFR, UART_EFR_ECB);
1230 serial_outp(info, UART_IER, 0);
1231 serial_outp(info, UART_LCR, 0);
1232 serial_icr_write(info, UART_CSR, 0); /* Reset the UART */
1233 serial_outp(info, UART_LCR, 0xBF);
1234 serial_outp(info, UART_EFR, UART_EFR_ECB);
1235 serial_outp(info, UART_LCR, 0);
1236 }
1237
1238 #ifdef CONFIG_SERIAL_RSA
1239 /*
1240 * If this is an RSA port, see if we can kick it up to the
1241 * higher speed clock.
1242 */
1243 if (state->type == PORT_RSA) {
1244 if (state->baud_base != SERIAL_RSA_BAUD_BASE &&
1245 enable_rsa(info))
1246 state->baud_base = SERIAL_RSA_BAUD_BASE;
1247 if (state->baud_base == SERIAL_RSA_BAUD_BASE)
1248 serial_outp(info, UART_RSA_FRR, 0);
1249 }
1250 #endif
1251
1252 /*
1253 * Clear the FIFO buffers and disable them
1254 * (they will be reenabled in change_speed())
1255 */
1256 if (uart_config[state->type].flags & UART_CLEAR_FIFO) {
1257 serial_outp(info, UART_FCR, UART_FCR_ENABLE_FIFO);
1258 serial_outp(info, UART_FCR, (UART_FCR_ENABLE_FIFO |
1259 UART_FCR_CLEAR_RCVR |
1260 UART_FCR_CLEAR_XMIT));
1261 serial_outp(info, UART_FCR, 0);
1262 }
1263
1264 /*
1265 * Clear the interrupt registers.
1266 */
1267 (void) serial_inp(info, UART_LSR);
1268 (void) serial_inp(info, UART_RX);
1269 (void) serial_inp(info, UART_IIR);
1270 (void) serial_inp(info, UART_MSR);
1271
1272 /*
1273 * At this point there's no way the LSR could still be 0xFF;
1274 * if it is, then bail out, because there's likely no UART
1275 * here.
1276 */
1277 if (!(info->flags & ASYNC_BUGGY_UART) &&
1278 (serial_inp(info, UART_LSR) == 0xff)) {
1279 printk("LSR safety check engaged!\n");
1280 if (capable(CAP_SYS_ADMIN)) {
1281 if (info->tty)
1282 set_bit(TTY_IO_ERROR, &info->tty->flags);
1283 } else
1284 retval = -ENODEV;
1285 goto errout;
1286 }
1287
1288 /*
1289 * Allocate the IRQ if necessary
1290 */
1291 if (state->irq && (!IRQ_ports[state->irq] ||
1292 !IRQ_ports[state->irq]->next_port)) {
1293 if (IRQ_ports[state->irq]) {
1294 #ifdef CONFIG_SERIAL_SHARE_IRQ
1295 free_irq(state->irq, &IRQ_ports[state->irq]);
1296 #ifdef CONFIG_SERIAL_MULTIPORT
1297 if (rs_multiport[state->irq].port1)
1298 handler = rs_interrupt_multi;
1299 else
1300 #endif
1301 handler = rs_interrupt;
1302 #else
1303 retval = -EBUSY;
1304 goto errout;
1305 #endif /* CONFIG_SERIAL_SHARE_IRQ */
1306 } else
1307 handler = rs_interrupt_single;
1308
1309 retval = request_irq(state->irq, handler, SA_SHIRQ,
1310 "serial", &IRQ_ports[state->irq]);
1311 if (retval) {
1312 if (capable(CAP_SYS_ADMIN)) {
1313 if (info->tty)
1314 set_bit(TTY_IO_ERROR,
1315 &info->tty->flags);
1316 retval = 0;
1317 }
1318 goto errout;
1319 }
1320 }
1321
1322 /*
1323 * Insert serial port into IRQ chain.
1324 */
1325 info->prev_port = 0;
1326 info->next_port = IRQ_ports[state->irq];
1327 if (info->next_port)
1328 info->next_port->prev_port = info;
1329 IRQ_ports[state->irq] = info;
1330 figure_IRQ_timeout(state->irq);
1331
1332 /*
1333 * Now, initialize the UART
1334 */
1335 serial_outp(info, UART_LCR, UART_LCR_WLEN8); /* reset DLAB */
1336
1337 info->MCR = 0;
1338 if (info->tty->termios->c_cflag & CBAUD)
1339 info->MCR = UART_MCR_DTR | UART_MCR_RTS;
1340 #ifdef CONFIG_SERIAL_MANY_PORTS
1341 if (info->flags & ASYNC_FOURPORT) {
1342 if (state->irq == 0)
1343 info->MCR |= UART_MCR_OUT1;
1344 } else
1345 #endif
1346 {
1347 if (state->irq != 0)
1348 info->MCR |= UART_MCR_OUT2;
1349 }
1350 info->MCR |= ALPHA_KLUDGE_MCR; /* Don't ask */
1351 serial_outp(info, UART_MCR, info->MCR);
1352
1353 /*
1354 * Finally, enable interrupts
1355 */
1356 info->IER = UART_IER_MSI | UART_IER_RLSI | UART_IER_RDI;
1357 serial_outp(info, UART_IER, info->IER); /* enable interrupts */
1358
1359 #ifdef CONFIG_SERIAL_MANY_PORTS
1360 if (info->flags & ASYNC_FOURPORT) {
1361 /* Enable interrupts on the AST Fourport board */
1362 ICP = (info->port & 0xFE0) | 0x01F;
1363 outb_p(0x80, ICP);
1364 (void) inb_p(ICP);
1365 }
1366 #endif
1367
1368 /*
1369 * And clear the interrupt registers again for luck.
1370 */
1371 (void)serial_inp(info, UART_LSR);
1372 (void)serial_inp(info, UART_RX);
1373 (void)serial_inp(info, UART_IIR);
1374 (void)serial_inp(info, UART_MSR);
1375
1376 if (info->tty)
1377 clear_bit(TTY_IO_ERROR, &info->tty->flags);
1378 info->xmit.head = info->xmit.tail = 0;
1379
1380 /*
1381 * Set up serial timers...
1382 */
1383 timer_table[RS_TIMER].expires = jiffies + 2*HZ/100;
1384 timer_active |= 1 << RS_TIMER;
1385
1386 /*
1387 * Set up the tty->alt_speed kludge
1388 */
1389 #if (LINUX_VERSION_CODE >= 131394) /* Linux 2.1.66 */
1390 if (info->tty) {
1391 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
1392 info->tty->alt_speed = 57600;
1393 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
1394 info->tty->alt_speed = 115200;
1395 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
1396 info->tty->alt_speed = 230400;
1397 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
1398 info->tty->alt_speed = 460800;
1399 }
1400 #endif
1401
1402 /*
1403 * and set the speed of the serial port
1404 */
1405 change_speed(info, 0);
1406
1407 info->flags |= ASYNC_INITIALIZED;
1408 restore_flags(flags);
1409 return 0;
1410
1411 errout:
1412 restore_flags(flags);
1413 return retval;
1414 }
1415
1416 /*
1417 * This routine will shutdown a serial port; interrupts are disabled, and
1418 * DTR is dropped if the hangup on close termio flag is on.
1419 */
1420 static void shutdown(struct async_struct * info)
1421 {
1422 unsigned long flags;
1423 struct serial_state *state;
1424 int retval;
1425
1426 if (!(info->flags & ASYNC_INITIALIZED))
1427 return;
1428
1429 state = info->state;
1430
1431 #ifdef SERIAL_DEBUG_OPEN
1432 printk("Shutting down serial port %d (irq %d)....", info->line,
1433 state->irq);
1434 #endif
1435
1436 save_flags(flags); cli(); /* Disable interrupts */
1437
1438 /*
1439 * clear delta_msr_wait queue to avoid mem leaks: we may free the irq
1440 * here so the queue might never be waken up
1441 */
1442 wake_up_interruptible(&info->delta_msr_wait);
1443
1444 /*
1445 * First unlink the serial port from the IRQ chain...
1446 */
1447 if (info->next_port)
1448 info->next_port->prev_port = info->prev_port;
1449 if (info->prev_port)
1450 info->prev_port->next_port = info->next_port;
1451 else
1452 IRQ_ports[state->irq] = info->next_port;
1453 figure_IRQ_timeout(state->irq);
1454
1455 /*
1456 * Free the IRQ, if necessary
1457 */
1458 if (state->irq && (!IRQ_ports[state->irq] ||
1459 !IRQ_ports[state->irq]->next_port)) {
1460 if (IRQ_ports[state->irq]) {
1461 free_irq(state->irq, &IRQ_ports[state->irq]);
1462 retval = request_irq(state->irq, rs_interrupt_single,
1463 SA_SHIRQ, "serial",
1464 &IRQ_ports[state->irq]);
1465
1466 if (retval)
1467 printk("serial shutdown: request_irq: error %d"
1468 " Couldn't reacquire IRQ.\n", retval);
1469 } else
1470 free_irq(state->irq, &IRQ_ports[state->irq]);
1471 }
1472
1473 if (info->xmit.buf) {
1474 unsigned long pg = (unsigned long) info->xmit.buf;
1475 info->xmit.buf = 0;
1476 free_page(pg);
1477 }
1478
1479 info->IER = 0;
1480 serial_outp(info, UART_IER, 0x00); /* disable all intrs */
1481 #ifdef CONFIG_SERIAL_MANY_PORTS
1482 if (info->flags & ASYNC_FOURPORT) {
1483 /* reset interrupts on the AST Fourport board */
1484 (void) inb((info->port & 0xFE0) | 0x01F);
1485 info->MCR |= UART_MCR_OUT1;
1486 } else
1487 #endif
1488 info->MCR &= ~UART_MCR_OUT2;
1489 info->MCR |= ALPHA_KLUDGE_MCR; /* Don't ask */
1490
1491 /* disable break condition */
1492 serial_out(info, UART_LCR, serial_inp(info, UART_LCR) & ~UART_LCR_SBC);
1493
1494 if (!info->tty || (info->tty->termios->c_cflag & HUPCL))
1495 info->MCR &= ~(UART_MCR_DTR|UART_MCR_RTS);
1496 serial_outp(info, UART_MCR, info->MCR);
1497
1498 /* disable FIFO's */
1499 serial_outp(info, UART_FCR, (UART_FCR_ENABLE_FIFO |
1500 UART_FCR_CLEAR_RCVR |
1501 UART_FCR_CLEAR_XMIT));
1502 serial_outp(info, UART_FCR, 0);
1503
1504 #ifdef CONFIG_SERIAL_RSA
1505 /*
1506 * Reset the RSA board back to 115kbps compat mode.
1507 */
1508 if ((state->type == PORT_RSA) &&
1509 (state->baud_base == SERIAL_RSA_BAUD_BASE &&
1510 disable_rsa(info)))
1511 state->baud_base = SERIAL_RSA_BAUD_BASE_LO;
1512 #endif
1513
1514
1515 (void)serial_in(info, UART_RX); /* read data port to reset things */
1516
1517 if (info->tty)
1518 set_bit(TTY_IO_ERROR, &info->tty->flags);
1519
1520 if (uart_config[info->state->type].flags & UART_STARTECH) {
1521 /* Arrange to enter sleep mode */
1522 serial_outp(info, UART_LCR, 0xBF);
1523 serial_outp(info, UART_EFR, UART_EFR_ECB);
1524 serial_outp(info, UART_IER, UART_IERX_SLEEP);
1525 serial_outp(info, UART_LCR, 0);
1526 }
1527 if (info->state->type == PORT_16750) {
1528 /* Arrange to enter sleep mode */
1529 serial_outp(info, UART_IER, UART_IERX_SLEEP);
1530 }
1531 info->flags &= ~ASYNC_INITIALIZED;
1532 restore_flags(flags);
1533 }
1534
1535 #if (LINUX_VERSION_CODE < 131394) /* Linux 2.1.66 */
1536 static int baud_table[] = {
1537 0, 50, 75, 110, 134, 150, 200, 300,
1538 600, 1200, 1800, 2400, 4800, 9600, 19200,
1539 38400, 57600, 115200, 230400, 460800, 0 };
1540
1541 static int tty_get_baud_rate(struct tty_struct *tty)
1542 {
1543 struct async_struct * info = (struct async_struct *)tty->driver_data;
1544 unsigned int cflag, i;
1545
1546 cflag = tty->termios->c_cflag;
1547
1548 i = cflag & CBAUD;
1549 if (i & CBAUDEX) {
1550 i &= ~CBAUDEX;
1551 if (i < 1 || i > 2)
1552 tty->termios->c_cflag &= ~CBAUDEX;
1553 else
1554 i += 15;
1555 }
1556 if (i == 15) {
1557 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
1558 i += 1;
1559 if ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
1560 i += 2;
1561 }
1562 return baud_table[i];
1563 }
1564 #endif
1565
1566 /*
1567 * This routine is called to set the UART divisor registers to match
1568 * the specified baud rate for a serial port.
1569 */
1570 static void change_speed(struct async_struct *info,
1571 struct termios *old_termios)
1572 {
1573 int quot = 0, baud_base, baud;
1574 unsigned cflag, cval, fcr = 0;
1575 int bits;
1576 unsigned long flags;
1577
1578 if (!info->tty || !info->tty->termios)
1579 return;
1580 cflag = info->tty->termios->c_cflag;
1581 if (!CONFIGURED_SERIAL_PORT(info))
1582 return;
1583
1584 /* byte size and parity */
1585 switch (cflag & CSIZE) {
1586 case CS5: cval = 0x00; bits = 7; break;
1587 case CS6: cval = 0x01; bits = 8; break;
1588 case CS7: cval = 0x02; bits = 9; break;
1589 case CS8: cval = 0x03; bits = 10; break;
1590 /* Never happens, but GCC is too dumb to figure it out */
1591 default: cval = 0x00; bits = 7; break;
1592 }
1593 if (cflag & CSTOPB) {
1594 cval |= 0x04;
1595 bits++;
1596 }
1597 if (cflag & PARENB) {
1598 cval |= UART_LCR_PARITY;
1599 bits++;
1600 }
1601 if (!(cflag & PARODD))
1602 cval |= UART_LCR_EPAR;
1603 #ifdef CMSPAR
1604 if (cflag & CMSPAR)
1605 cval |= UART_LCR_SPAR;
1606 #endif
1607
1608 /* Determine divisor based on baud rate */
1609 baud = tty_get_baud_rate(info->tty);
1610 if (!baud)
1611 baud = 9600; /* B0 transition handled in rs_set_termios */
1612 #ifdef CONFIG_SERIAL_RSA
1613 if ((info->state->type == PORT_RSA) &&
1614 (info->state->baud_base != SERIAL_RSA_BAUD_BASE) &&
1615 enable_rsa(info))
1616 info->state->baud_base = SERIAL_RSA_BAUD_BASE;
1617 #endif
1618 baud_base = info->state->baud_base;
1619 if (info->state->type == PORT_16C950) {
1620 if (baud <= baud_base)
1621 serial_icr_write(info, UART_TCR, 0);
1622 else if (baud <= 2*baud_base) {
1623 serial_icr_write(info, UART_TCR, 0x8);
1624 baud_base = baud_base * 2;
1625 } else if (baud <= 4*baud_base) {
1626 serial_icr_write(info, UART_TCR, 0x4);
1627 baud_base = baud_base * 4;
1628 } else
1629 serial_icr_write(info, UART_TCR, 0);
1630 }
1631 if (baud == 38400 &&
1632 ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST))
1633 quot = info->state->custom_divisor;
1634 else {
1635 if (baud == 134)
1636 /* Special case since 134 is really 134.5 */
1637 quot = (2*baud_base / 269);
1638 else if (baud)
1639 quot = baud_base / baud;
1640 }
1641 /* If the quotient is zero refuse the change */
1642 if (!quot && old_termios) {
1643 info->tty->termios->c_cflag &= ~CBAUD;
1644 info->tty->termios->c_cflag |= (old_termios->c_cflag & CBAUD);
1645 baud = tty_get_baud_rate(info->tty);
1646 if (!baud)
1647 baud = 9600;
1648 if (baud == 38400 &&
1649 ((info->flags & ASYNC_SPD_MASK) == ASYNC_SPD_CUST))
1650 quot = info->state->custom_divisor;
1651 else {
1652 if (baud == 134)
1653 /* Special case since 134 is really 134.5 */
1654 quot = (2*baud_base / 269);
1655 else if (baud)
1656 quot = baud_base / baud;
1657 }
1658 }
1659 /* As a last resort, if the quotient is zero, default to 9600 bps */
1660 if (!quot)
1661 quot = baud_base / 9600;
1662 /*
1663 * Work around a bug in the Oxford Semiconductor 952 rev B
1664 * chip which causes it to seriously miscalculate baud rates
1665 * when DLL is 0.
1666 */
1667 if (((quot & 0xFF) == 0) && (info->state->type == PORT_16C950) &&
1668 (info->state->revision == 0x5201))
1669 quot++;
1670
1671 info->quot = quot;
1672 info->timeout = ((info->xmit_fifo_size*HZ*bits*quot) / baud_base);
1673 info->timeout += HZ/50; /* Add .02 seconds of slop */
1674
1675 /* Set up FIFO's */
1676 if (uart_config[info->state->type].flags & UART_USE_FIFO) {
1677 if ((info->state->baud_base / quot) < 2400)
1678 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_1;
1679 #ifdef CONFIG_SERIAL_RSA
1680 else if (info->state->type == PORT_RSA)
1681 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_14;
1682 #endif
1683 else
1684 fcr = UART_FCR_ENABLE_FIFO | UART_FCR_TRIGGER_8;
1685 }
1686 if (info->state->type == PORT_16750)
1687 fcr |= UART_FCR7_64BYTE;
1688
1689 /* CTS flow control flag and modem status interrupts */
1690 info->IER &= ~UART_IER_MSI;
1691 if (info->flags & ASYNC_HARDPPS_CD)
1692 info->IER |= UART_IER_MSI;
1693 if (cflag & CRTSCTS) {
1694 info->flags |= ASYNC_CTS_FLOW;
1695 info->IER |= UART_IER_MSI;
1696 } else
1697 info->flags &= ~ASYNC_CTS_FLOW;
1698 if (cflag & CLOCAL)
1699 info->flags &= ~ASYNC_CHECK_CD;
1700 else {
1701 info->flags |= ASYNC_CHECK_CD;
1702 info->IER |= UART_IER_MSI;
1703 }
1704 serial_out(info, UART_IER, info->IER);
1705
1706 /*
1707 * Set up parity check flag
1708 */
1709 #define RELEVANT_IFLAG(iflag) (iflag & (IGNBRK|BRKINT|IGNPAR|PARMRK|INPCK))
1710
1711 info->read_status_mask = UART_LSR_OE | UART_LSR_THRE | UART_LSR_DR;
1712 if (I_INPCK(info->tty))
1713 info->read_status_mask |= UART_LSR_FE | UART_LSR_PE;
1714 if (I_BRKINT(info->tty) || I_PARMRK(info->tty))
1715 info->read_status_mask |= UART_LSR_BI;
1716
1717 /*
1718 * Characters to ignore
1719 */
1720 info->ignore_status_mask = 0;
1721 if (I_IGNPAR(info->tty))
1722 info->ignore_status_mask |= UART_LSR_PE | UART_LSR_FE;
1723 if (I_IGNBRK(info->tty)) {
1724 info->ignore_status_mask |= UART_LSR_BI;
1725 /*
1726 * If we're ignore parity and break indicators, ignore
1727 * overruns too. (For real raw support).
1728 */
1729 if (I_IGNPAR(info->tty))
1730 info->ignore_status_mask |= UART_LSR_OE;
1731 }
1732 /*
1733 * !!! ignore all characters if CREAD is not set
1734 */
1735 if ((cflag & CREAD) == 0)
1736 info->ignore_status_mask |= UART_LSR_DR;
1737 save_flags(flags); cli();
1738 if (uart_config[info->state->type].flags & UART_STARTECH) {
1739 serial_outp(info, UART_LCR, 0xBF);
1740 serial_outp(info, UART_EFR,
1741 (cflag & CRTSCTS) ? UART_EFR_CTS : 0);
1742 }
1743 serial_outp(info, UART_LCR, cval | UART_LCR_DLAB); /* set DLAB */
1744 serial_outp(info, UART_DLL, quot & 0xff); /* LS of divisor */
1745 serial_outp(info, UART_DLM, quot >> 8); /* MS of divisor */
1746 if (info->state->type == PORT_16750)
1747 serial_outp(info, UART_FCR, fcr); /* set fcr */
1748 serial_outp(info, UART_LCR, cval); /* reset DLAB */
1749 info->LCR = cval; /* Save LCR */
1750 if (info->state->type != PORT_16750) {
1751 if (fcr & UART_FCR_ENABLE_FIFO) {
1752 /* emulated UARTs (Lucent Venus 167x) need two steps */
1753 serial_outp(info, UART_FCR, UART_FCR_ENABLE_FIFO);
1754 }
1755 serial_outp(info, UART_FCR, fcr); /* set fcr */
1756 }
1757 restore_flags(flags);
1758 }
1759
1760 static void rs_put_char(struct tty_struct *tty, unsigned char ch)
1761 {
1762 struct async_struct *info = (struct async_struct *)tty->driver_data;
1763 unsigned long flags;
1764
1765 if (serial_paranoia_check(info, tty->device, "rs_put_char"))
1766 return;
1767
1768 if (!tty || !info->xmit.buf)
1769 return;
1770
1771 save_flags(flags); cli();
1772 if (CIRC_SPACE(info->xmit.head,
1773 info->xmit.tail,
1774 SERIAL_XMIT_SIZE) == 0) {
1775 restore_flags(flags);
1776 return;
1777 }
1778
1779 info->xmit.buf[info->xmit.head] = ch;
1780 info->xmit.head = (info->xmit.head + 1) & (SERIAL_XMIT_SIZE-1);
1781 restore_flags(flags);
1782 }
1783
1784 static void rs_flush_chars(struct tty_struct *tty)
1785 {
1786 struct async_struct *info = (struct async_struct *)tty->driver_data;
1787 unsigned long flags;
1788
1789 if (serial_paranoia_check(info, tty->device, "rs_flush_chars"))
1790 return;
1791
1792 if (info->xmit.head == info->xmit.tail
1793 || tty->stopped
1794 || tty->hw_stopped
1795 || !info->xmit.buf)
1796 return;
1797
1798 save_flags(flags); cli();
1799 info->IER |= UART_IER_THRI;
1800 serial_out(info, UART_IER, info->IER);
1801 restore_flags(flags);
1802 }
1803
1804 static int rs_write(struct tty_struct * tty, int from_user,
1805 const unsigned char *buf, int count)
1806 {
1807 int c, ret = 0;
1808 struct async_struct *info = (struct async_struct *)tty->driver_data;
1809 unsigned long flags;
1810
1811 if (serial_paranoia_check(info, tty->device, "rs_write"))
1812 return 0;
1813
1814 if (!tty || !info->xmit.buf || !tmp_buf)
1815 return 0;
1816
1817 save_flags(flags);
1818 if (from_user) {
1819 down(&tmp_buf_sem);
1820 while (1) {
1821 int c1;
1822 c = CIRC_SPACE_TO_END(info->xmit.head,
1823 info->xmit.tail,
1824 SERIAL_XMIT_SIZE);
1825 if (count < c)
1826 c = count;
1827 if (c <= 0)
1828 break;
1829
1830 c -= copy_from_user(tmp_buf, buf, c);
1831 if (!c) {
1832 if (!ret)
1833 ret = -EFAULT;
1834 break;
1835 }
1836 cli();
1837 c1 = CIRC_SPACE_TO_END(info->xmit.head,
1838 info->xmit.tail,
1839 SERIAL_XMIT_SIZE);
1840 if (c1 < c)
1841 c = c1;
1842 memcpy(info->xmit.buf + info->xmit.head, tmp_buf, c);
1843 info->xmit.head = ((info->xmit.head + c) &
1844 (SERIAL_XMIT_SIZE-1));
1845 restore_flags(flags);
1846 buf += c;
1847 count -= c;
1848 ret += c;
1849 }
1850 up(&tmp_buf_sem);
1851 } else {
1852 cli();
1853 while (1) {
1854 c = CIRC_SPACE_TO_END(info->xmit.head,
1855 info->xmit.tail,
1856 SERIAL_XMIT_SIZE);
1857 if (count < c)
1858 c = count;
1859 if (c <= 0) {
1860 break;
1861 }
1862 memcpy(info->xmit.buf + info->xmit.head, buf, c);
1863 info->xmit.head = ((info->xmit.head + c) &
1864 (SERIAL_XMIT_SIZE-1));
1865 buf += c;
1866 count -= c;
1867 ret += c;
1868 }
1869 restore_flags(flags);
1870 }
1871 if (info->xmit.head != info->xmit.tail
1872 && !tty->stopped
1873 && !tty->hw_stopped
1874 && !(info->IER & UART_IER_THRI)) {
1875 info->IER |= UART_IER_THRI;
1876 serial_out(info, UART_IER, info->IER);
1877 }
1878 return ret;
1879 }
1880
1881 static int rs_write_room(struct tty_struct *tty)
1882 {
1883 struct async_struct *info = (struct async_struct *)tty->driver_data;
1884
1885 if (serial_paranoia_check(info, tty->device, "rs_write_room"))
1886 return 0;
1887 return CIRC_SPACE(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
1888 }
1889
1890 static int rs_chars_in_buffer(struct tty_struct *tty)
1891 {
1892 struct async_struct *info = (struct async_struct *)tty->driver_data;
1893
1894 if (serial_paranoia_check(info, tty->device, "rs_chars_in_buffer"))
1895 return 0;
1896 return CIRC_CNT(info->xmit.head, info->xmit.tail, SERIAL_XMIT_SIZE);
1897 }
1898
1899 static void rs_flush_buffer(struct tty_struct *tty)
1900 {
1901 struct async_struct *info = (struct async_struct *)tty->driver_data;
1902 unsigned long flags;
1903
1904 if (serial_paranoia_check(info, tty->device, "rs_flush_buffer"))
1905 return;
1906 save_flags(flags); cli();
1907 info->xmit.head = info->xmit.tail = 0;
1908 restore_flags(flags);
1909 wake_up_interruptible(&tty->write_wait);
1910 #ifdef SERIAL_HAVE_POLL_WAIT
1911 wake_up_interruptible(&tty->poll_wait);
1912 #endif
1913 if ((tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
1914 tty->ldisc.write_wakeup)
1915 (tty->ldisc.write_wakeup)(tty);
1916 }
1917
1918 /*
1919 * This function is used to send a high-priority XON/XOFF character to
1920 * the device
1921 */
1922 static void rs_send_xchar(struct tty_struct *tty, char ch)
1923 {
1924 struct async_struct *info = (struct async_struct *)tty->driver_data;
1925
1926 if (serial_paranoia_check(info, tty->device, "rs_send_char"))
1927 return;
1928
1929 info->x_char = ch;
1930 if (ch) {
1931 /* Make sure transmit interrupts are on */
1932 info->IER |= UART_IER_THRI;
1933 serial_out(info, UART_IER, info->IER);
1934 }
1935 }
1936
1937 /*
1938 * ------------------------------------------------------------
1939 * rs_throttle()
1940 *
1941 * This routine is called by the upper-layer tty layer to signal that
1942 * incoming characters should be throttled.
1943 * ------------------------------------------------------------
1944 */
1945 static void rs_throttle(struct tty_struct * tty)
1946 {
1947 struct async_struct *info = (struct async_struct *)tty->driver_data;
1948 unsigned long flags;
1949 #ifdef SERIAL_DEBUG_THROTTLE
1950 char buf[64];
1951
1952 printk("throttle %s: %d....\n", tty_name(tty, buf),
1953 tty->ldisc.chars_in_buffer(tty));
1954 #endif
1955
1956 if (serial_paranoia_check(info, tty->device, "rs_throttle"))
1957 return;
1958
1959 if (I_IXOFF(tty))
1960 rs_send_xchar(tty, STOP_CHAR(tty));
1961
1962 if (tty->termios->c_cflag & CRTSCTS)
1963 info->MCR &= ~UART_MCR_RTS;
1964
1965 save_flags(flags); cli();
1966 serial_out(info, UART_MCR, info->MCR);
1967 restore_flags(flags);
1968 }
1969
1970 static void rs_unthrottle(struct tty_struct * tty)
1971 {
1972 struct async_struct *info = (struct async_struct *)tty->driver_data;
1973 unsigned long flags;
1974 #ifdef SERIAL_DEBUG_THROTTLE
1975 char buf[64];
1976
1977 printk("unthrottle %s: %d....\n", tty_name(tty, buf),
1978 tty->ldisc.chars_in_buffer(tty));
1979 #endif
1980
1981 if (serial_paranoia_check(info, tty->device, "rs_unthrottle"))
1982 return;
1983
1984 if (I_IXOFF(tty)) {
1985 if (info->x_char)
1986 info->x_char = 0;
1987 else
1988 rs_send_xchar(tty, START_CHAR(tty));
1989 }
1990 if (tty->termios->c_cflag & CRTSCTS)
1991 info->MCR |= UART_MCR_RTS;
1992 save_flags(flags); cli();
1993 serial_out(info, UART_MCR, info->MCR);
1994 restore_flags(flags);
1995 }
1996
1997 /*
1998 * ------------------------------------------------------------
1999 * rs_ioctl() and friends
2000 * ------------------------------------------------------------
2001 */
2002
2003 static int get_serial_info(struct async_struct * info,
2004 struct serial_struct * retinfo)
2005 {
2006 struct serial_struct tmp;
2007 struct serial_state *state = info->state;
2008
2009 if (!retinfo)
2010 return -EFAULT;
2011 memset(&tmp, 0, sizeof(tmp));
2012 tmp.type = state->type;
2013 tmp.line = state->line;
2014 tmp.port = state->port;
2015 if (HIGH_BITS_OFFSET)
2016 tmp.port_high = state->port >> HIGH_BITS_OFFSET;
2017 else
2018 tmp.port_high = 0;
2019 tmp.irq = state->irq;
2020 tmp.flags = state->flags;
2021 tmp.xmit_fifo_size = state->xmit_fifo_size;
2022 tmp.baud_base = state->baud_base;
2023 tmp.close_delay = state->close_delay;
2024 tmp.closing_wait = state->closing_wait;
2025 tmp.custom_divisor = state->custom_divisor;
2026 tmp.hub6 = state->hub6;
2027 tmp.io_type = state->io_type;
2028 if (copy_to_user(retinfo,&tmp,sizeof(*retinfo)))
2029 return -EFAULT;
2030 return 0;
2031 }
2032
2033 static int set_serial_info(struct async_struct * info,
2034 struct serial_struct * new_info)
2035 {
2036 struct serial_struct new_serial;
2037 struct serial_state old_state, *state;
2038 unsigned int i,change_irq,change_port;
2039 int retval = 0;
2040 unsigned long new_port;
2041
2042 if (copy_from_user(&new_serial,new_info,sizeof(new_serial)))
2043 return -EFAULT;
2044 state = info->state;
2045 old_state = *state;
2046
2047 new_port = new_serial.port;
2048 if (HIGH_BITS_OFFSET)
2049 new_port += new_serial.port_high << HIGH_BITS_OFFSET;
2050
2051 change_irq = new_serial.irq != state->irq;
2052 change_port = (new_port != ((int) state->port)) ||
2053 (new_serial.hub6 != state->hub6);
2054
2055 if (!capable(CAP_SYS_ADMIN)) {
2056 if (change_irq || change_port ||
2057 (new_serial.baud_base != state->baud_base) ||
2058 (new_serial.type != state->type) ||
2059 (new_serial.close_delay != state->close_delay) ||
2060 (new_serial.xmit_fifo_size != state->xmit_fifo_size) ||
2061 ((new_serial.flags & ~ASYNC_USR_MASK) !=
2062 (state->flags & ~ASYNC_USR_MASK)))
2063 return -EPERM;
2064 state->flags = ((state->flags & ~ASYNC_USR_MASK) |
2065 (new_serial.flags & ASYNC_USR_MASK));
2066 info->flags = ((info->flags & ~ASYNC_USR_MASK) |
2067 (new_serial.flags & ASYNC_USR_MASK));
2068 state->custom_divisor = new_serial.custom_divisor;
2069 goto check_and_exit;
2070 }
2071
2072 new_serial.irq = irq_cannonicalize(new_serial.irq);
2073
2074 if ((new_serial.irq >= NR_IRQS) ||
2075 (new_serial.baud_base < 9600)|| (new_serial.type < PORT_UNKNOWN) ||
2076 (new_serial.type > PORT_MAX) || (new_serial.type == PORT_CIRRUS) ||
2077 (new_serial.type == PORT_STARTECH)) {
2078 return -EINVAL;
2079 }
2080
2081 if ((new_serial.type != state->type) ||
2082 (new_serial.xmit_fifo_size <= 0))
2083 new_serial.xmit_fifo_size =
2084 uart_config[new_serial.type].dfl_xmit_fifo_size;
2085
2086 /* Make sure address is not already in use */
2087 if (new_serial.type) {
2088 for (i = 0 ; i < NR_PORTS; i++)
2089 if ((state != &rs_table[i]) &&
2090 (rs_table[i].port == new_port) &&
2091 rs_table[i].type)
2092 return -EADDRINUSE;
2093 }
2094
2095 if ((change_port || change_irq) && (state->count > 1))
2096 return -EBUSY;
2097
2098 /*
2099 * OK, past this point, all the error checking has been done.
2100 * At this point, we start making changes.....
2101 */
2102
2103 state->baud_base = new_serial.baud_base;
2104 state->flags = ((state->flags & ~ASYNC_FLAGS) |
2105 (new_serial.flags & ASYNC_FLAGS));
2106 info->flags = ((state->flags & ~ASYNC_INTERNAL_FLAGS) |
2107 (info->flags & ASYNC_INTERNAL_FLAGS));
2108 state->custom_divisor = new_serial.custom_divisor;
2109 state->close_delay = new_serial.close_delay * HZ/100;
2110 state->closing_wait = new_serial.closing_wait * HZ/100;
2111 #if (LINUX_VERSION_CODE > 0x20100)
2112 info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
2113 #endif
2114 info->xmit_fifo_size = state->xmit_fifo_size =
2115 new_serial.xmit_fifo_size;
2116
2117 if ((state->type != PORT_UNKNOWN) && state->port) {
2118 #ifdef CONFIG_SERIAL_RSA
2119 if (old_state.type == PORT_RSA)
2120 release_region(state->port + UART_RSA_BASE, 16);
2121 else
2122 #endif
2123 release_region(state->port,8);
2124 }
2125 state->type = new_serial.type;
2126 if (change_port || change_irq) {
2127 /*
2128 * We need to shutdown the serial port at the old
2129 * port/irq combination.
2130 */
2131 shutdown(info);
2132 state->irq = new_serial.irq;
2133 info->port = state->port = new_port;
2134 info->hub6 = state->hub6 = new_serial.hub6;
2135 if (info->hub6)
2136 info->io_type = state->io_type = SERIAL_IO_HUB6;
2137 else if (info->io_type == SERIAL_IO_HUB6)
2138 info->io_type = state->io_type = SERIAL_IO_PORT;
2139 }
2140 if ((state->type != PORT_UNKNOWN) && state->port) {
2141 #ifdef CONFIG_SERIAL_RSA
2142 if (state->type == PORT_RSA)
2143 request_region(state->port + UART_RSA_BASE,
2144 16, "serial_rsa(set)");
2145 else
2146 #endif
2147 request_region(state->port,8,"serial(set)");
2148 }
2149
2150
2151 check_and_exit:
2152 if (!state->port || !state->type)
2153 return 0;
2154 if (info->flags & ASYNC_INITIALIZED) {
2155 if (((old_state.flags & ASYNC_SPD_MASK) !=
2156 (state->flags & ASYNC_SPD_MASK)) ||
2157 (old_state.custom_divisor != state->custom_divisor)) {
2158 #if (LINUX_VERSION_CODE >= 131394) /* Linux 2.1.66 */
2159 if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI)
2160 info->tty->alt_speed = 57600;
2161 if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI)
2162 info->tty->alt_speed = 115200;
2163 if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_SHI)
2164 info->tty->alt_speed = 230400;
2165 if ((state->flags & ASYNC_SPD_MASK) == ASYNC_SPD_WARP)
2166 info->tty->alt_speed = 460800;
2167 #endif
2168 change_speed(info, 0);
2169 }
2170 } else
2171 retval = startup(info);
2172 return retval;
2173 }
2174
2175
2176 /*
2177 * get_lsr_info - get line status register info
2178 *
2179 * Purpose: Let user call ioctl() to get info when the UART physically
2180 * is emptied. On bus types like RS485, the transmitter must
2181 * release the bus after transmitting. This must be done when
2182 * the transmit shift register is empty, not be done when the
2183 * transmit holding register is empty. This functionality
2184 * allows an RS485 driver to be written in user space.
2185 */
2186 static int get_lsr_info(struct async_struct * info, unsigned int *value)
2187 {
2188 unsigned char status;
2189 unsigned int result;
2190 unsigned long flags;
2191
2192 save_flags(flags); cli();
2193 status = serial_in(info, UART_LSR);
2194 restore_flags(flags);
2195 result = ((status & UART_LSR_TEMT) ? TIOCSER_TEMT : 0);
2196
2197 /*
2198 * If we're about to load something into the transmit
2199 * register, we'll pretend the transmitter isn't empty to
2200 * avoid a race condition (depending on when the transmit
2201 * interrupt happens).
2202 */
2203 if (info->x_char ||
2204 ((CIRC_CNT(info->xmit.head, info->xmit.tail,
2205 SERIAL_XMIT_SIZE) > 0) &&
2206 !info->tty->stopped && !info->tty->hw_stopped))
2207 result &= TIOCSER_TEMT;
2208
2209 if (copy_to_user(value, &result, sizeof(int)))
2210 return -EFAULT;
2211 return 0;
2212 }
2213
2214
2215 static int get_modem_info(struct async_struct * info, unsigned int *value)
2216 {
2217 unsigned char control, status;
2218 unsigned int result;
2219 unsigned long flags;
2220
2221 control = info->MCR;
2222 save_flags(flags); cli();
2223 status = serial_in(info, UART_MSR);
2224 restore_flags(flags);
2225 result = ((control & UART_MCR_RTS) ? TIOCM_RTS : 0)
2226 | ((control & UART_MCR_DTR) ? TIOCM_DTR : 0)
2227 #ifdef TIOCM_OUT1
2228 | ((control & UART_MCR_OUT1) ? TIOCM_OUT1 : 0)
2229 | ((control & UART_MCR_OUT2) ? TIOCM_OUT2 : 0)
2230 #endif
2231 | ((status & UART_MSR_DCD) ? TIOCM_CAR : 0)
2232 | ((status & UART_MSR_RI) ? TIOCM_RNG : 0)
2233 | ((status & UART_MSR_DSR) ? TIOCM_DSR : 0)
2234 | ((status & UART_MSR_CTS) ? TIOCM_CTS : 0);
2235
2236 if (copy_to_user(value, &result, sizeof(int)))
2237 return -EFAULT;
2238 return 0;
2239 }
2240
2241 static int set_modem_info(struct async_struct * info, unsigned int cmd,
2242 unsigned int *value)
2243 {
2244 unsigned int arg;
2245 unsigned long flags;
2246
2247 if (copy_from_user(&arg, value, sizeof(int)))
2248 return -EFAULT;
2249
2250 switch (cmd) {
2251 case TIOCMBIS:
2252 if (arg & TIOCM_RTS)
2253 info->MCR |= UART_MCR_RTS;
2254 if (arg & TIOCM_DTR)
2255 info->MCR |= UART_MCR_DTR;
2256 #ifdef TIOCM_OUT1
2257 if (arg & TIOCM_OUT1)
2258 info->MCR |= UART_MCR_OUT1;
2259 if (arg & TIOCM_OUT2)
2260 info->MCR |= UART_MCR_OUT2;
2261 #endif
2262 if (arg & TIOCM_LOOP)
2263 info->MCR |= UART_MCR_LOOP;
2264 break;
2265 case TIOCMBIC:
2266 if (arg & TIOCM_RTS)
2267 info->MCR &= ~UART_MCR_RTS;
2268 if (arg & TIOCM_DTR)
2269 info->MCR &= ~UART_MCR_DTR;
2270 #ifdef TIOCM_OUT1
2271 if (arg & TIOCM_OUT1)
2272 info->MCR &= ~UART_MCR_OUT1;
2273 if (arg & TIOCM_OUT2)
2274 info->MCR &= ~UART_MCR_OUT2;
2275 #endif
2276 if (arg & TIOCM_LOOP)
2277 info->MCR &= ~UART_MCR_LOOP;
2278 break;
2279 case TIOCMSET:
2280 info->MCR = ((info->MCR & ~(UART_MCR_RTS |
2281 #ifdef TIOCM_OUT1
2282 UART_MCR_OUT1 |
2283 UART_MCR_OUT2 |
2284 #endif
2285 UART_MCR_LOOP |
2286 UART_MCR_DTR))
2287 | ((arg & TIOCM_RTS) ? UART_MCR_RTS : 0)
2288 #ifdef TIOCM_OUT1
2289 | ((arg & TIOCM_OUT1) ? UART_MCR_OUT1 : 0)
2290 | ((arg & TIOCM_OUT2) ? UART_MCR_OUT2 : 0)
2291 #endif
2292 | ((arg & TIOCM_LOOP) ? UART_MCR_LOOP : 0)
2293 | ((arg & TIOCM_DTR) ? UART_MCR_DTR : 0));
2294 break;
2295 default:
2296 return -EINVAL;
2297 }
2298 save_flags(flags); cli();
2299 info->MCR |= ALPHA_KLUDGE_MCR; /* Don't ask */
2300 serial_out(info, UART_MCR, info->MCR);
2301 restore_flags(flags);
2302 return 0;
2303 }
2304
2305 static int do_autoconfig(struct async_struct * info)
2306 {
2307 int retval;
2308
2309 if (!capable(CAP_SYS_ADMIN))
2310 return -EPERM;
2311
2312 if (info->state->count > 1)
2313 return -EBUSY;
2314
2315 shutdown(info);
2316
2317 autoconfig(info->state);
2318 if ((info->state->flags & ASYNC_AUTO_IRQ) &&
2319 (info->state->port != 0) &&
2320 (info->state->type != PORT_UNKNOWN))
2321 info->state->irq = detect_uart_irq(info->state);
2322
2323 retval = startup(info);
2324 if (retval)
2325 return retval;
2326 return 0;
2327 }
2328
2329 /*
2330 * rs_break() --- routine which turns the break handling on or off
2331 */
2332 #if (LINUX_VERSION_CODE < 131394) /* Linux 2.1.66 */
2333 static void send_break( struct async_struct * info, int duration)
2334 {
2335 if (!CONFIGURED_SERIAL_PORT(info))
2336 return;
2337 current->state = TASK_INTERRUPTIBLE;
2338 current->timeout = jiffies + duration;
2339 cli();
2340 info->LCR |= UART_LCR_SBC;
2341 serial_out(info, UART_LCR, info->LCR);
2342 schedule();
2343 info->LCR &= ~UART_LCR_SBC;
2344 serial_out(info, UART_LCR, info->LCR);
2345 sti();
2346 }
2347 #else
2348 static void rs_break(struct tty_struct *tty, int break_state)
2349 {
2350 struct async_struct * info = (struct async_struct *)tty->driver_data;
2351 unsigned long flags;
2352
2353 if (serial_paranoia_check(info, tty->device, "rs_break"))
2354 return;
2355
2356 if (!CONFIGURED_SERIAL_PORT(info))
2357 return;
2358 save_flags(flags); cli();
2359 if (break_state == -1)
2360 info->LCR |= UART_LCR_SBC;
2361 else
2362 info->LCR &= ~UART_LCR_SBC;
2363 serial_out(info, UART_LCR, info->LCR);
2364 restore_flags(flags);
2365 }
2366 #endif
2367
2368 #ifdef CONFIG_SERIAL_MULTIPORT
2369 static int get_multiport_struct(struct async_struct * info,
2370 struct serial_multiport_struct *retinfo)
2371 {
2372 struct serial_multiport_struct ret;
2373 struct rs_multiport_struct *multi;
2374
2375 multi = &rs_multiport[info->state->irq];
2376
2377 ret.port_monitor = multi->port_monitor;
2378
2379 ret.port1 = multi->port1;
2380 ret.mask1 = multi->mask1;
2381 ret.match1 = multi->match1;
2382
2383 ret.port2 = multi->port2;
2384 ret.mask2 = multi->mask2;
2385 ret.match2 = multi->match2;
2386
2387 ret.port3 = multi->port3;
2388 ret.mask3 = multi->mask3;
2389 ret.match3 = multi->match3;
2390
2391 ret.port4 = multi->port4;
2392 ret.mask4 = multi->mask4;
2393 ret.match4 = multi->match4;
2394
2395 ret.irq = info->state->irq;
2396
2397 if (copy_to_user(retinfo,&ret,sizeof(*retinfo)))
2398 return -EFAULT;
2399 return 0;
2400 }
2401
2402 static int set_multiport_struct(struct async_struct * info,
2403 struct serial_multiport_struct *in_multi)
2404 {
2405 struct serial_multiport_struct new_multi;
2406 struct rs_multiport_struct *multi;
2407 struct serial_state *state;
2408 int was_multi, now_multi;
2409 int retval;
2410 void (*handler)(int, void *, struct pt_regs *);
2411
2412 if (!capable(CAP_SYS_ADMIN))
2413 return -EPERM;
2414 state = info->state;
2415
2416 if (copy_from_user(&new_multi, in_multi,
2417 sizeof(struct serial_multiport_struct)))
2418 return -EFAULT;
2419
2420 if (new_multi.irq != state->irq || state->irq == 0 ||
2421 !IRQ_ports[state->irq])
2422 return -EINVAL;
2423
2424 multi = &rs_multiport[state->irq];
2425 was_multi = (multi->port1 != 0);
2426
2427 multi->port_monitor = new_multi.port_monitor;
2428
2429 if (multi->port1)
2430 release_region(multi->port1,1);
2431 multi->port1 = new_multi.port1;
2432 multi->mask1 = new_multi.mask1;
2433 multi->match1 = new_multi.match1;
2434 if (multi->port1)
2435 request_region(multi->port1,1,"serial(multiport1)");
2436
2437 if (multi->port2)
2438 release_region(multi->port2,1);
2439 multi->port2 = new_multi.port2;
2440 multi->mask2 = new_multi.mask2;
2441 multi->match2 = new_multi.match2;
2442 if (multi->port2)
2443 request_region(multi->port2,1,"serial(multiport2)");
2444
2445 if (multi->port3)
2446 release_region(multi->port3,1);
2447 multi->port3 = new_multi.port3;
2448 multi->mask3 = new_multi.mask3;
2449 multi->match3 = new_multi.match3;
2450 if (multi->port3)
2451 request_region(multi->port3,1,"serial(multiport3)");
2452
2453 if (multi->port4)
2454 release_region(multi->port4,1);
2455 multi->port4 = new_multi.port4;
2456 multi->mask4 = new_multi.mask4;
2457 multi->match4 = new_multi.match4;
2458 if (multi->port4)
2459 request_region(multi->port4,1,"serial(multiport4)");
2460
2461 now_multi = (multi->port1 != 0);
2462
2463 if (IRQ_ports[state->irq]->next_port &&
2464 (was_multi != now_multi)) {
2465 free_irq(state->irq, &IRQ_ports[state->irq]);
2466 if (now_multi)
2467 handler = rs_interrupt_multi;
2468 else
2469 handler = rs_interrupt;
2470
2471 retval = request_irq(state->irq, handler, SA_SHIRQ,
2472 "serial", &IRQ_ports[state->irq]);
2473 if (retval) {
2474 printk("Couldn't reallocate serial interrupt "
2475 "driver!!\n");
2476 }
2477 }
2478 return 0;
2479 }
2480 #endif
2481
2482 static int rs_ioctl(struct tty_struct *tty, struct file * file,
2483 unsigned int cmd, unsigned long arg)
2484 {
2485 struct async_struct * info = (struct async_struct *)tty->driver_data;
2486 struct async_icount cprev, cnow; /* kernel counter temps */
2487 struct serial_icounter_struct icount;
2488 unsigned long flags;
2489 #if (LINUX_VERSION_CODE < 131394) /* Linux 2.1.66 */
2490 int retval, tmp;
2491 #endif
2492
2493 if (serial_paranoia_check(info, tty->device, "rs_ioctl"))
2494 return -ENODEV;
2495
2496 if ((cmd != TIOCGSERIAL) && (cmd != TIOCSSERIAL) &&
2497 (cmd != TIOCSERCONFIG) && (cmd != TIOCSERGSTRUCT) &&
2498 (cmd != TIOCMIWAIT) && (cmd != TIOCGICOUNT)) {
2499 if (tty->flags & (1 << TTY_IO_ERROR))
2500 return -EIO;
2501 }
2502
2503 switch (cmd) {
2504 #if (LINUX_VERSION_CODE < 131394) /* Linux 2.1.66 */
2505 case TCSBRK: /* SVID version: non-zero arg --> no break */
2506 retval = tty_check_change(tty);
2507 if (retval)
2508 return retval;
2509 tty_wait_until_sent(tty, 0);
2510 if (signal_pending(current))
2511 return -EINTR;
2512 if (!arg) {
2513 send_break(info, HZ/4); /* 1/4 second */
2514 if (signal_pending(current))
2515 return -EINTR;
2516 }
2517 return 0;
2518 case TCSBRKP: /* support for POSIX tcsendbreak() */
2519 retval = tty_check_change(tty);
2520 if (retval)
2521 return retval;
2522 tty_wait_until_sent(tty, 0);
2523 if (signal_pending(current))
2524 return -EINTR;
2525 send_break(info, arg ? arg*(HZ/10) : HZ/4);
2526 if (signal_pending(current))
2527 return -EINTR;
2528 return 0;
2529 case TIOCGSOFTCAR:
2530 tmp = C_CLOCAL(tty) ? 1 : 0;
2531 if (copy_to_user((void *)arg, &tmp, sizeof(int)))
2532 return -EFAULT;
2533 return 0;
2534 case TIOCSSOFTCAR:
2535 if (copy_from_user(&tmp, (void *)arg, sizeof(int)))
2536 return -EFAULT;
2537
2538 tty->termios->c_cflag =
2539 ((tty->termios->c_cflag & ~CLOCAL) |
2540 (tmp ? CLOCAL : 0));
2541 return 0;
2542 #endif
2543 case TIOCMGET:
2544 return get_modem_info(info, (unsigned int *) arg);
2545 case TIOCMBIS:
2546 case TIOCMBIC:
2547 case TIOCMSET:
2548 return set_modem_info(info, cmd, (unsigned int *) arg);
2549 case TIOCGSERIAL:
2550 return get_serial_info(info,
2551 (struct serial_struct *) arg);
2552 case TIOCSSERIAL:
2553 return set_serial_info(info,
2554 (struct serial_struct *) arg);
2555 case TIOCSERCONFIG:
2556 return do_autoconfig(info);
2557
2558 case TIOCSERGETLSR: /* Get line status register */
2559 return get_lsr_info(info, (unsigned int *) arg);
2560
2561 case TIOCSERGSTRUCT:
2562 if (copy_to_user((struct async_struct *) arg,
2563 info, sizeof(struct async_struct)))
2564 return -EFAULT;
2565 return 0;
2566
2567 #ifdef CONFIG_SERIAL_MULTIPORT
2568 case TIOCSERGETMULTI:
2569 return get_multiport_struct(info,
2570 (struct serial_multiport_struct *) arg);
2571 case TIOCSERSETMULTI:
2572 return set_multiport_struct(info,
2573 (struct serial_multiport_struct *) arg);
2574 #endif
2575
2576 /*
2577 * Wait for any of the 4 modem inputs (DCD,RI,DSR,CTS) to change
2578 * - mask passed in arg for lines of interest
2579 * (use |'ed TIOCM_RNG/DSR/CD/CTS for masking)
2580 * Caller should use TIOCGICOUNT to see which one it was
2581 */
2582 case TIOCMIWAIT:
2583 save_flags(flags); cli();
2584 /* note the counters on entry */
2585 cprev = info->state->icount;
2586 restore_flags(flags);
2587 /* Force modem status interrupts on */
2588 info->IER |= UART_IER_MSI;
2589 serial_out(info, UART_IER, info->IER);
2590 while (1) {
2591 interruptible_sleep_on(&info->delta_msr_wait);
2592 /* see if a signal did it */
2593 if (signal_pending(current))
2594 return -ERESTARTSYS;
2595 save_flags(flags); cli();
2596 cnow = info->state->icount; /* atomic copy */
2597 restore_flags(flags);
2598 if (cnow.rng == cprev.rng && cnow.dsr == cprev.dsr &&
2599 cnow.dcd == cprev.dcd && cnow.cts == cprev.cts)
2600 return -EIO; /* no change => error */
2601 if ( ((arg & TIOCM_RNG) && (cnow.rng != cprev.rng)) ||
2602 ((arg & TIOCM_DSR) && (cnow.dsr != cprev.dsr)) ||
2603 ((arg & TIOCM_CD) && (cnow.dcd != cprev.dcd)) ||
2604 ((arg & TIOCM_CTS) && (cnow.cts != cprev.cts)) ) {
2605 return 0;
2606 }
2607 cprev = cnow;
2608 }
2609 /* NOTREACHED */
2610
2611 /*
2612 * Get counter of input serial line interrupts (DCD,RI,DSR,CTS)
2613 * Return: write counters to the user passed counter struct
2614 * NB: both 1->0 and 0->1 transitions are counted except for
2615 * RI where only 0->1 is counted.
2616 */
2617 case TIOCGICOUNT:
2618 save_flags(flags); cli();
2619 cnow = info->state->icount;
2620 restore_flags(flags);
2621 icount.cts = cnow.cts;
2622 icount.dsr = cnow.dsr;
2623 icount.rng = cnow.rng;
2624 icount.dcd = cnow.dcd;
2625 icount.rx = cnow.rx;
2626 icount.tx = cnow.tx;
2627 icount.frame = cnow.frame;
2628 icount.overrun = cnow.overrun;
2629 icount.parity = cnow.parity;
2630 icount.brk = cnow.brk;
2631 icount.buf_overrun = cnow.buf_overrun;
2632
2633 if (copy_to_user((void *)arg, &icount, sizeof(icount)))
2634 return -EFAULT;
2635 return 0;
2636 case TIOCSERGWILD:
2637 case TIOCSERSWILD:
2638 /* "setserial -W" is called in Debian boot */
2639 printk ("TIOCSER?WILD ioctl obsolete, ignored.\n");
2640 return 0;
2641
2642 default:
2643 return -ENOIOCTLCMD;
2644 }
2645 return 0;
2646 }
2647
2648 static void rs_set_termios(struct tty_struct *tty, struct termios *old_termios)
2649 {
2650 struct async_struct *info = (struct async_struct *)tty->driver_data;
2651 unsigned long flags;
2652 unsigned int cflag = tty->termios->c_cflag;
2653
2654 if ( (cflag == old_termios->c_cflag)
2655 && ( RELEVANT_IFLAG(tty->termios->c_iflag)
2656 == RELEVANT_IFLAG(old_termios->c_iflag)))
2657 return;
2658
2659 change_speed(info, old_termios);
2660
2661 /* Handle transition to B0 status */
2662 if ((old_termios->c_cflag & CBAUD) &&
2663 !(cflag & CBAUD)) {
2664 info->MCR &= ~(UART_MCR_DTR|UART_MCR_RTS);
2665 save_flags(flags); cli();
2666 serial_out(info, UART_MCR, info->MCR);
2667 restore_flags(flags);
2668 }
2669
2670 /* Handle transition away from B0 status */
2671 if (!(old_termios->c_cflag & CBAUD) &&
2672 (cflag & CBAUD)) {
2673 info->MCR |= UART_MCR_DTR;
2674 if (!(tty->termios->c_cflag & CRTSCTS) ||
2675 !test_bit(TTY_THROTTLED, &tty->flags)) {
2676 info->MCR |= UART_MCR_RTS;
2677 }
2678 save_flags(flags); cli();
2679 serial_out(info, UART_MCR, info->MCR);
2680 restore_flags(flags);
2681 }
2682
2683 /* Handle turning off CRTSCTS */
2684 if ((old_termios->c_cflag & CRTSCTS) &&
2685 !(tty->termios->c_cflag & CRTSCTS)) {
2686 tty->hw_stopped = 0;
2687 rs_start(tty);
2688 }
2689
2690 #if 0
2691 /*
2692 * No need to wake up processes in open wait, since they
2693 * sample the CLOCAL flag once, and don't recheck it.
2694 * XXX It's not clear whether the current behavior is correct
2695 * or not. Hence, this may change.....
2696 */
2697 if (!(old_termios->c_cflag & CLOCAL) &&
2698 (tty->termios->c_cflag & CLOCAL))
2699 wake_up_interruptible(&info->open_wait);
2700 #endif
2701 }
2702
2703 /*
2704 * ------------------------------------------------------------
2705 * rs_close()
2706 *
2707 * This routine is called when the serial port gets closed. First, we
2708 * wait for the last remaining data to be sent. Then, we unlink its
2709 * async structure from the interrupt chain if necessary, and we free
2710 * that IRQ if nothing is left in the chain.
2711 * ------------------------------------------------------------
2712 */
2713 static void rs_close(struct tty_struct *tty, struct file * filp)
2714 {
2715 struct async_struct * info = (struct async_struct *)tty->driver_data;
2716 struct serial_state *state;
2717 unsigned long flags;
2718
2719 if (!info || serial_paranoia_check(info, tty->device, "rs_close"))
2720 return;
2721
2722 state = info->state;
2723
2724 save_flags(flags); cli();
2725
2726 if (tty_hung_up_p(filp)) {
2727 DBG_CNT("before DEC-hung");
2728 MOD_DEC_USE_COUNT;
2729 restore_flags(flags);
2730 return;
2731 }
2732
2733 #ifdef SERIAL_DEBUG_OPEN
2734 printk("rs_close ttys%d, count = %d\n", info->line, state->count);
2735 #endif
2736 if ((tty->count == 1) && (state->count != 1)) {
2737 /*
2738 * Uh, oh. tty->count is 1, which means that the tty
2739 * structure will be freed. state->count should always
2740 * be one in these conditions. If it's greater than
2741 * one, we've got real problems, since it means the
2742 * serial port won't be shutdown.
2743 */
2744 printk("rs_close: bad serial port count; tty->count is 1, "
2745 "state->count is %d\n", state->count);
2746 state->count = 1;
2747 }
2748 if (--state->count < 0) {
2749 printk("rs_close: bad serial port count for ttys%d: %d\n",
2750 info->line, state->count);
2751 state->count = 0;
2752 }
2753 if (state->count) {
2754 DBG_CNT("before DEC-2");
2755 MOD_DEC_USE_COUNT;
2756 restore_flags(flags);
2757 return;
2758 }
2759 info->flags |= ASYNC_CLOSING;
2760 restore_flags(flags);
2761 /*
2762 * Save the termios structure, since this port may have
2763 * separate termios for callout and dialin.
2764 */
2765 if (info->flags & ASYNC_NORMAL_ACTIVE)
2766 info->state->normal_termios = *tty->termios;
2767 if (info->flags & ASYNC_CALLOUT_ACTIVE)
2768 info->state->callout_termios = *tty->termios;
2769 /*
2770 * Now we wait for the transmit buffer to clear; and we notify
2771 * the line discipline to only process XON/XOFF characters.
2772 */
2773 tty->closing = 1;
2774 if (info->closing_wait != ASYNC_CLOSING_WAIT_NONE)
2775 tty_wait_until_sent(tty, info->closing_wait);
2776 /*
2777 * At this point we stop accepting input. To do this, we
2778 * disable the receive line status interrupts, and tell the
2779 * interrupt driver to stop checking the data ready bit in the
2780 * line status register.
2781 */
2782 info->IER &= ~UART_IER_RLSI;
2783 info->read_status_mask &= ~UART_LSR_DR;
2784 if (info->flags & ASYNC_INITIALIZED) {
2785 serial_out(info, UART_IER, info->IER);
2786 /*
2787 * Before we drop DTR, make sure the UART transmitter
2788 * has completely drained; this is especially
2789 * important if there is a transmit FIFO!
2790 */
2791 rs_wait_until_sent(tty, info->timeout);
2792 }
2793 shutdown(info);
2794 if (tty->driver.flush_buffer)
2795 tty->driver.flush_buffer(tty);
2796 if (tty->ldisc.flush_buffer)
2797 tty->ldisc.flush_buffer(tty);
2798 tty->closing = 0;
2799 info->event = 0;
2800 info->tty = 0;
2801 if (info->blocked_open) {
2802 if (info->close_delay) {
2803 set_current_state(TASK_INTERRUPTIBLE);
2804 schedule_timeout(info->close_delay);
2805 }
2806 wake_up_interruptible(&info->open_wait);
2807 }
2808 info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE|
2809 ASYNC_CLOSING);
2810 wake_up_interruptible(&info->close_wait);
2811 MOD_DEC_USE_COUNT;
2812 }
2813
2814 /*
2815 * rs_wait_until_sent() --- wait until the transmitter is empty
2816 */
2817 static void rs_wait_until_sent(struct tty_struct *tty, int timeout)
2818 {
2819 struct async_struct * info = (struct async_struct *)tty->driver_data;
2820 unsigned long orig_jiffies, char_time;
2821 int lsr;
2822
2823 if (serial_paranoia_check(info, tty->device, "rs_wait_until_sent"))
2824 return;
2825
2826 if (info->state->type == PORT_UNKNOWN)
2827 return;
2828
2829 if (info->xmit_fifo_size == 0)
2830 return; /* Just in case.... */
2831
2832 orig_jiffies = jiffies;
2833 /*
2834 * Set the check interval to be 1/5 of the estimated time to
2835 * send a single character, and make it at least 1. The check
2836 * interval should also be less than the timeout.
2837 *
2838 * Note: we have to use pretty tight timings here to satisfy
2839 * the NIST-PCTS.
2840 */
2841 char_time = (info->timeout - HZ/50) / info->xmit_fifo_size;
2842 char_time = char_time / 5;
2843 if (char_time == 0)
2844 char_time = 1;
2845 if (timeout && timeout < char_time)
2846 char_time = timeout;
2847 /*
2848 * If the transmitter hasn't cleared in twice the approximate
2849 * amount of time to send the entire FIFO, it probably won't
2850 * ever clear. This assumes the UART isn't doing flow
2851 * control, which is currently the case. Hence, if it ever
2852 * takes longer than info->timeout, this is probably due to a
2853 * UART bug of some kind. So, we clamp the timeout parameter at
2854 * 2*info->timeout.
2855 */
2856 if (!timeout || timeout > 2*info->timeout)
2857 timeout = 2*info->timeout;
2858 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2859 printk("In rs_wait_until_sent(%d) check=%lu...", timeout, char_time);
2860 printk("jiff=%lu...", jiffies);
2861 #endif
2862 while (!((lsr = serial_inp(info, UART_LSR)) & UART_LSR_TEMT)) {
2863 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2864 printk("lsr = %d (jiff=%lu)...", lsr, jiffies);
2865 #endif
2866 set_current_state(TASK_INTERRUPTIBLE);
2867 schedule_timeout(char_time);
2868 if (signal_pending(current))
2869 break;
2870 if (timeout && time_after(jiffies, orig_jiffies + timeout))
2871 break;
2872 }
2873 set_current_state(TASK_RUNNING);
2874 #ifdef SERIAL_DEBUG_RS_WAIT_UNTIL_SENT
2875 printk("lsr = %d (jiff=%lu)...done\n", lsr, jiffies);
2876 #endif
2877 }
2878
2879 /*
2880 * rs_hangup() --- called by tty_hangup() when a hangup is signaled.
2881 */
2882 static void rs_hangup(struct tty_struct *tty)
2883 {
2884 struct async_struct * info = (struct async_struct *)tty->driver_data;
2885 struct serial_state *state = info->state;
2886
2887 if (serial_paranoia_check(info, tty->device, "rs_hangup"))
2888 return;
2889
2890 state = info->state;
2891
2892 rs_flush_buffer(tty);
2893 if (info->flags & ASYNC_CLOSING)
2894 return;
2895 shutdown(info);
2896 info->event = 0;
2897 state->count = 0;
2898 info->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CALLOUT_ACTIVE);
2899 info->tty = 0;
2900 wake_up_interruptible(&info->open_wait);
2901 }
2902
2903 /*
2904 * ------------------------------------------------------------
2905 * rs_open() and friends
2906 * ------------------------------------------------------------
2907 */
2908 static int block_til_ready(struct tty_struct *tty, struct file * filp,
2909 struct async_struct *info)
2910 {
2911 DECLARE_WAITQUEUE(wait, current);
2912 struct serial_state *state = info->state;
2913 int retval;
2914 int do_clocal = 0, extra_count = 0;
2915 unsigned long flags;
2916
2917 /*
2918 * If the device is in the middle of being closed, then block
2919 * until it's done, and then try again.
2920 */
2921 if (tty_hung_up_p(filp) ||
2922 (info->flags & ASYNC_CLOSING)) {
2923 if (info->flags & ASYNC_CLOSING)
2924 interruptible_sleep_on(&info->close_wait);
2925 #ifdef SERIAL_DO_RESTART
2926 return ((info->flags & ASYNC_HUP_NOTIFY) ?
2927 -EAGAIN : -ERESTARTSYS);
2928 #else
2929 return -EAGAIN;
2930 #endif
2931 }
2932
2933 /*
2934 * If this is a callout device, then just make sure the normal
2935 * device isn't being used.
2936 */
2937 if (tty->driver.subtype == SERIAL_TYPE_CALLOUT) {
2938 if (info->flags & ASYNC_NORMAL_ACTIVE)
2939 return -EBUSY;
2940 if ((info->flags & ASYNC_CALLOUT_ACTIVE) &&
2941 (info->flags & ASYNC_SESSION_LOCKOUT) &&
2942 (info->session != current->session))
2943 return -EBUSY;
2944 if ((info->flags & ASYNC_CALLOUT_ACTIVE) &&
2945 (info->flags & ASYNC_PGRP_LOCKOUT) &&
2946 (info->pgrp != current->pgrp))
2947 return -EBUSY;
2948 info->flags |= ASYNC_CALLOUT_ACTIVE;
2949 return 0;
2950 }
2951
2952 /*
2953 * If non-blocking mode is set, or the port is not enabled,
2954 * then make the check up front and then exit.
2955 */
2956 if ((filp->f_flags & O_NONBLOCK) ||
2957 (tty->flags & (1 << TTY_IO_ERROR))) {
2958 if (info->flags & ASYNC_CALLOUT_ACTIVE)
2959 return -EBUSY;
2960 info->flags |= ASYNC_NORMAL_ACTIVE;
2961 return 0;
2962 }
2963
2964 if (info->flags & ASYNC_CALLOUT_ACTIVE) {
2965 if (state->normal_termios.c_cflag & CLOCAL)
2966 do_clocal = 1;
2967 } else {
2968 if (tty->termios->c_cflag & CLOCAL)
2969 do_clocal = 1;
2970 }
2971
2972 /*
2973 * Block waiting for the carrier detect and the line to become
2974 * free (i.e., not in use by the callout). While we are in
2975 * this loop, state->count is dropped by one, so that
2976 * rs_close() knows when to free things. We restore it upon
2977 * exit, either normal or abnormal.
2978 */
2979 retval = 0;
2980 add_wait_queue(&info->open_wait, &wait);
2981 #ifdef SERIAL_DEBUG_OPEN
2982 printk("block_til_ready before block: ttys%d, count = %d\n",
2983 state->line, state->count);
2984 #endif
2985 save_flags(flags); cli();
2986 if (!tty_hung_up_p(filp)) {
2987 extra_count = 1;
2988 state->count--;
2989 }
2990 restore_flags(flags);
2991 info->blocked_open++;
2992 while (1) {
2993 save_flags(flags); cli();
2994 if (!(info->flags & ASYNC_CALLOUT_ACTIVE) &&
2995 (tty->termios->c_cflag & CBAUD))
2996 serial_out(info, UART_MCR,
2997 serial_inp(info, UART_MCR) |
2998 (UART_MCR_DTR | UART_MCR_RTS));
2999 restore_flags(flags);
3000 set_current_state(TASK_INTERRUPTIBLE);
3001 if (tty_hung_up_p(filp) ||
3002 !(info->flags & ASYNC_INITIALIZED)) {
3003 #ifdef SERIAL_DO_RESTART
3004 if (info->flags & ASYNC_HUP_NOTIFY)
3005 retval = -EAGAIN;
3006 else
3007 retval = -ERESTARTSYS;
3008 #else
3009 retval = -EAGAIN;
3010 #endif
3011 break;
3012 }
3013 if (!(info->flags & ASYNC_CALLOUT_ACTIVE) &&
3014 !(info->flags & ASYNC_CLOSING) &&
3015 (do_clocal || (serial_in(info, UART_MSR) &
3016 UART_MSR_DCD)))
3017 break;
3018 if (signal_pending(current)) {
3019 retval = -ERESTARTSYS;
3020 break;
3021 }
3022 #ifdef SERIAL_DEBUG_OPEN
3023 printk("block_til_ready blocking: ttys%d, count = %d\n",
3024 info->line, state->count);
3025 #endif
3026 schedule();
3027 }
3028 set_current_state(TASK_RUNNING);
3029 remove_wait_queue(&info->open_wait, &wait);
3030 if (extra_count)
3031 state->count++;
3032 info->blocked_open--;
3033 #ifdef SERIAL_DEBUG_OPEN
3034 printk("block_til_ready after blocking: ttys%d, count = %d\n",
3035 info->line, state->count);
3036 #endif
3037 if (retval)
3038 return retval;
3039 info->flags |= ASYNC_NORMAL_ACTIVE;
3040 return 0;
3041 }
3042
3043 static int get_async_struct(int line, struct async_struct **ret_info)
3044 {
3045 struct async_struct *info;
3046 struct serial_state *sstate;
3047
3048 sstate = rs_table + line;
3049 sstate->count++;
3050 if (sstate->info) {
3051 *ret_info = sstate->info;
3052 return 0;
3053 }
3054 info = kmalloc(sizeof(struct async_struct), GFP_KERNEL);
3055 if (!info) {
3056 sstate->count--;
3057 return -ENOMEM;
3058 }
3059 memset(info, 0, sizeof(struct async_struct));
3060 init_waitqueue_head(&info->open_wait);
3061 init_waitqueue_head(&info->close_wait);
3062 init_waitqueue_head(&info->delta_msr_wait);
3063 info->magic = SERIAL_MAGIC;
3064 info->port = sstate->port;
3065 info->flags = sstate->flags;
3066 info->io_type = sstate->io_type;
3067 info->iomem_base = sstate->iomem_base;
3068 info->iomem_reg_shift = sstate->iomem_reg_shift;
3069 info->xmit_fifo_size = sstate->xmit_fifo_size;
3070 info->line = line;
3071 info->tqueue.routine = do_softint;
3072 info->tqueue.data = info;
3073 info->state = sstate;
3074 if (sstate->info) {
3075 kfree_s(info, sizeof(struct async_struct));
3076 *ret_info = sstate->info;
3077 return 0;
3078 }
3079 *ret_info = sstate->info = info;
3080 return 0;
3081 }
3082
3083 /*
3084 * This routine is called whenever a serial port is opened. It
3085 * enables interrupts for a serial port, linking in its async structure into
3086 * the IRQ chain. It also performs the serial-specific
3087 * initialization for the tty structure.
3088 */
3089 static int rs_open(struct tty_struct *tty, struct file * filp)
3090 {
3091 struct async_struct *info;
3092 int retval, line;
3093 unsigned long page;
3094
3095 MOD_INC_USE_COUNT;
3096 line = MINOR(tty->device) - tty->driver.minor_start;
3097 if ((line < 0) || (line >= NR_PORTS)) {
3098 MOD_DEC_USE_COUNT;
3099 return -ENODEV;
3100 }
3101 retval = get_async_struct(line, &info);
3102 if (retval) {
3103 MOD_DEC_USE_COUNT;
3104 return retval;
3105 }
3106 tty->driver_data = info;
3107 info->tty = tty;
3108 if (serial_paranoia_check(info, tty->device, "rs_open"))
3109 return -ENODEV;
3110
3111 #ifdef SERIAL_DEBUG_OPEN
3112 printk("rs_open %s%d, count = %d\n", tty->driver.name, info->line,
3113 info->state->count);
3114 #endif
3115 #if (LINUX_VERSION_CODE > 0x20100)
3116 info->tty->low_latency = (info->flags & ASYNC_LOW_LATENCY) ? 1 : 0;
3117 #endif
3118
3119 if (!tmp_buf) {
3120 page = get_zeroed_page(GFP_KERNEL);
3121 if (!page) {
3122 return -ENOMEM;
3123 }
3124 if (tmp_buf)
3125 free_page(page);
3126 else
3127 tmp_buf = (unsigned char *) page;
3128 }
3129
3130 /*
3131 * If the port is the middle of closing, bail out now
3132 */
3133 if (tty_hung_up_p(filp) ||
3134 (info->flags & ASYNC_CLOSING)) {
3135 if (info->flags & ASYNC_CLOSING)
3136 interruptible_sleep_on(&info->close_wait);
3137 #ifdef SERIAL_DO_RESTART
3138 return ((info->flags & ASYNC_HUP_NOTIFY) ?
3139 -EAGAIN : -ERESTARTSYS);
3140 #else
3141 return -EAGAIN;
3142 #endif
3143 }
3144
3145 /*
3146 * Start up serial port
3147 */
3148 retval = startup(info);
3149 if (retval) {
3150 return retval;
3151 }
3152
3153 retval = block_til_ready(tty, filp, info);
3154 if (retval) {
3155 #ifdef SERIAL_DEBUG_OPEN
3156 printk("rs_open returning after block_til_ready with %d\n",
3157 retval);
3158 #endif
3159 return retval;
3160 }
3161
3162 if ((info->state->count == 1) &&
3163 (info->flags & ASYNC_SPLIT_TERMIOS)) {
3164 if (tty->driver.subtype == SERIAL_TYPE_NORMAL)
3165 *tty->termios = info->state->normal_termios;
3166 else
3167 *tty->termios = info->state->callout_termios;
3168 change_speed(info, 0);
3169 }
3170 #ifdef CONFIG_SERIAL_CONSOLE
3171 if (sercons.cflag && sercons.index == line) {
3172 tty->termios->c_cflag = sercons.cflag;
3173 sercons.cflag = 0;
3174 change_speed(info, 0);
3175 }
3176 #endif
3177 info->session = current->session;
3178 info->pgrp = current->pgrp;
3179
3180 #ifdef SERIAL_DEBUG_OPEN
3181 printk("rs_open ttys%d successful...", info->line);
3182 #endif
3183 return 0;
3184 }
3185
3186 /*
3187 * /proc fs routines....
3188 */
3189
3190 static inline int line_info(char *buf, struct serial_state *state)
3191 {
3192 struct async_struct *info = state->info, scr_info;
3193 char stat_buf[30], control, status;
3194 int ret;
3195 unsigned long flags;
3196
3197 ret = sprintf(buf, "%d: uart:%s port:%lX irq:%d",
3198 state->line, uart_config[state->type].name,
3199 state->port, state->irq);
3200
3201 if (!state->port || (state->type == PORT_UNKNOWN)) {
3202 ret += sprintf(buf+ret, "\n");
3203 return ret;
3204 }
3205
3206 /*
3207 * Figure out the current RS-232 lines
3208 */
3209 if (!info) {
3210 info = &scr_info; /* This is just for serial_{in,out} */
3211
3212 info->magic = SERIAL_MAGIC;
3213 info->port = state->port;
3214 info->flags = state->flags;
3215 info->quot = 0;
3216 info->tty = 0;
3217 }
3218 save_flags(flags); cli();
3219 status = serial_in(info, UART_MSR);
3220 control = info != &scr_info ? info->MCR : serial_in(info, UART_MCR);
3221 restore_flags(flags);
3222
3223 stat_buf[0] = 0;
3224 stat_buf[1] = 0;
3225 if (control & UART_MCR_RTS)
3226 strcat(stat_buf, "|RTS");
3227 if (status & UART_MSR_CTS)
3228 strcat(stat_buf, "|CTS");
3229 if (control & UART_MCR_DTR)
3230 strcat(stat_buf, "|DTR");
3231 if (status & UART_MSR_DSR)
3232 strcat(stat_buf, "|DSR");
3233 if (status & UART_MSR_DCD)
3234 strcat(stat_buf, "|CD");
3235 if (status & UART_MSR_RI)
3236 strcat(stat_buf, "|RI");
3237
3238 if (info->quot) {
3239 ret += sprintf(buf+ret, " baud:%d",
3240 state->baud_base / info->quot);
3241 }
3242
3243 ret += sprintf(buf+ret, " tx:%d rx:%d",
3244 state->icount.tx, state->icount.rx);
3245
3246 if (state->icount.frame)
3247 ret += sprintf(buf+ret, " fe:%d", state->icount.frame);
3248
3249 if (state->icount.parity)
3250 ret += sprintf(buf+ret, " pe:%d", state->icount.parity);
3251
3252 if (state->icount.brk)
3253 ret += sprintf(buf+ret, " brk:%d", state->icount.brk);
3254
3255 if (state->icount.overrun)
3256 ret += sprintf(buf+ret, " oe:%d", state->icount.overrun);
3257
3258 /*
3259 * Last thing is the RS-232 status lines
3260 */
3261 ret += sprintf(buf+ret, " %s\n", stat_buf+1);
3262 return ret;
3263 }
3264
3265 int rs_read_proc(char *page, char **start, off_t off, int count,
3266 int *eof, void *data)
3267 {
3268 int i, len = 0, l;
3269 off_t begin = 0;
3270
3271 len += sprintf(page, "serinfo:1.0 driver:%s%s revision:%s\n",
3272 serial_version, LOCAL_VERSTRING, serial_revdate);
3273 for (i = 0; i < NR_PORTS && len < 4000; i++) {
3274 l = line_info(page + len, &rs_table[i]);
3275 len += l;
3276 if (len+begin > off+count)
3277 goto done;
3278 if (len+begin < off) {
3279 begin += len;
3280 len = 0;
3281 }
3282 }
3283 *eof = 1;
3284 done:
3285 if (off >= len+begin)
3286 return 0;
3287 *start = page + (off-begin);
3288 return ((count < begin+len-off) ? count : begin+len-off);
3289 }
3290
3291 /*
3292 * ---------------------------------------------------------------------
3293 * rs_init() and friends
3294 *
3295 * rs_init() is called at boot-time to initialize the serial driver.
3296 * ---------------------------------------------------------------------
3297 */
3298
3299 /*
3300 * This routine prints out the appropriate serial driver version
3301 * number, and identifies which options were configured into this
3302 * driver.
3303 */
3304 static char serial_options[] __initdata =
3305 #ifdef CONFIG_HUB6
3306 " HUB-6"
3307 #define SERIAL_OPT
3308 #endif
3309 #ifdef CONFIG_SERIAL_MANY_PORTS
3310 " MANY_PORTS"
3311 #define SERIAL_OPT
3312 #endif
3313 #ifdef CONFIG_SERIAL_MULTIPORT
3314 " MULTIPORT"
3315 #define SERIAL_OPT
3316 #endif
3317 #ifdef CONFIG_SERIAL_SHARE_IRQ
3318 " SHARE_IRQ"
3319 #define SERIAL_OPT
3320 #endif
3321 #ifdef CONFIG_SERIAL_DETECT_IRQ
3322 " DETECT_IRQ"
3323 #define SERIAL_OPT
3324 #endif
3325 #ifdef ENABLE_SERIAL_PCI
3326 " SERIAL_PCI"
3327 #define SERIAL_OPT
3328 #endif
3329 #ifdef ENABLE_SERIAL_PNP
3330 " ISAPNP"
3331 #define SERIAL_OPT
3332 #endif
3333 #ifdef SERIAL_OPT
3334 " enabled\n";
3335 #else
3336 " no serial options enabled\n";
3337 #endif
3338 #undef SERIAL_OPT
3339
3340 static _INLINE_ void show_serial_version(void)
3341 {
3342 printk(KERN_INFO "%s version %s%s (%s) with%s", serial_name,
3343 serial_version, LOCAL_VERSTRING, serial_revdate,
3344 serial_options);
3345 }
3346
3347 /*
3348 * This routine detect the IRQ of a serial port by clearing OUT2 when
3349 * no UART interrupt are requested (IER = 0) (*GPL*). This seems to work at
3350 * each time, as long as no other device permanently request the IRQ.
3351 * If no IRQ is detected, or multiple IRQ appear, this function returns 0.
3352 * The variable "state" and the field "state->port" should not be null.
3353 */
3354 static unsigned detect_uart_irq (struct serial_state * state)
3355 {
3356 int irq;
3357 unsigned long irqs;
3358 unsigned char save_mcr, save_ier;
3359 struct async_struct scr_info; /* serial_{in,out} because HUB6 */
3360
3361 #ifdef CONFIG_SERIAL_MANY_PORTS
3362 unsigned char save_ICP=0; /* no warning */
3363 unsigned short ICP=0;
3364
3365 if (state->flags & ASYNC_FOURPORT) {
3366 ICP = (state->port & 0xFE0) | 0x01F;
3367 save_ICP = inb_p(ICP);
3368 outb_p(0x80, ICP);
3369 (void) inb_p(ICP);
3370 }
3371 #endif
3372 scr_info.magic = SERIAL_MAGIC;
3373 scr_info.state = state;
3374 scr_info.port = state->port;
3375 scr_info.flags = state->flags;
3376 #ifdef CONFIG_HUB6
3377 scr_info.hub6 = state->hub6;
3378 #endif
3379 scr_info.io_type = state->io_type;
3380 scr_info.iomem_base = state->iomem_base;
3381 scr_info.iomem_reg_shift = state->iomem_reg_shift;
3382
3383 /* forget possible initially masked and pending IRQ */
3384 probe_irq_off(probe_irq_on());
3385 save_mcr = serial_inp(&scr_info, UART_MCR);
3386 save_ier = serial_inp(&scr_info, UART_IER);
3387 serial_outp(&scr_info, UART_MCR, UART_MCR_OUT1 | UART_MCR_OUT2);
3388
3389 irqs = probe_irq_on();
3390 serial_outp(&scr_info, UART_MCR, 0);
3391 udelay (10);
3392 if (state->flags & ASYNC_FOURPORT) {
3393 serial_outp(&scr_info, UART_MCR,
3394 UART_MCR_DTR | UART_MCR_RTS);
3395 } else {
3396 serial_outp(&scr_info, UART_MCR,
3397 UART_MCR_DTR | UART_MCR_RTS | UART_MCR_OUT2);
3398 }
3399 serial_outp(&scr_info, UART_IER, 0x0f); /* enable all intrs */
3400 (void)serial_inp(&scr_info, UART_LSR);
3401 (void)serial_inp(&scr_info, UART_RX);
3402 (void)serial_inp(&scr_info, UART_IIR);
3403 (void)serial_inp(&scr_info, UART_MSR);
3404 serial_outp(&scr_info, UART_TX, 0xFF);
3405 udelay (20);
3406 irq = probe_irq_off(irqs);
3407
3408 serial_outp(&scr_info, UART_MCR, save_mcr);
3409 serial_outp(&scr_info, UART_IER, save_ier);
3410 #ifdef CONFIG_SERIAL_MANY_PORTS
3411 if (state->flags & ASYNC_FOURPORT)
3412 outb_p(save_ICP, ICP);
3413 #endif
3414 return (irq > 0)? irq : 0;
3415 }
3416
3417 /*
3418 * This is a quickie test to see how big the FIFO is.
3419 * It doesn't work at all the time, more's the pity.
3420 */
3421 static int size_fifo(struct async_struct *info)
3422 {
3423 unsigned char old_fcr, old_mcr, old_dll, old_dlm;
3424 int count;
3425
3426 old_fcr = serial_inp(info, UART_FCR);
3427 old_mcr = serial_inp(info, UART_MCR);
3428 serial_outp(info, UART_FCR, UART_FCR_ENABLE_FIFO |
3429 UART_FCR_CLEAR_RCVR | UART_FCR_CLEAR_XMIT);
3430 serial_outp(info, UART_MCR, UART_MCR_LOOP);
3431 serial_outp(info, UART_LCR, UART_LCR_DLAB);
3432 old_dll = serial_inp(info, UART_DLL);
3433 old_dlm = serial_inp(info, UART_DLM);
3434 serial_outp(info, UART_DLL, 0x01);
3435 serial_outp(info, UART_DLM, 0x00);
3436 serial_outp(info, UART_LCR, 0x03);
3437 for (count = 0; count < 256; count++)
3438 serial_outp(info, UART_TX, count);
3439 mdelay(20);
3440 for (count = 0; (serial_inp(info, UART_LSR) & UART_LSR_DR) &&
3441 (count < 256); count++)
3442 serial_inp(info, UART_RX);
3443 serial_outp(info, UART_FCR, old_fcr);
3444 serial_outp(info, UART_MCR, old_mcr);
3445 serial_outp(info, UART_LCR, UART_LCR_DLAB);
3446 serial_outp(info, UART_DLL, old_dll);
3447 serial_outp(info, UART_DLM, old_dlm);
3448
3449 return count;
3450 }
3451
3452 /*
3453 * This is a helper routine to autodetect StarTech/Exar/Oxsemi UART's.
3454 * When this function is called we know it is at least a StarTech
3455 * 16650 V2, but it might be one of several StarTech UARTs, or one of
3456 * its clones. (We treat the broken original StarTech 16650 V1 as a
3457 * 16550, and why not? Startech doesn't seem to even acknowledge its
3458 * existence.)
3459 *
3460 * What evil have men's minds wrought...
3461 */
3462 static void autoconfig_startech_uarts(struct async_struct *info,
3463 struct serial_state *state,
3464 unsigned long flags)
3465 {
3466 unsigned char scratch, scratch2, scratch3;
3467
3468 /*
3469 * First we check to see if it's an Oxford Semiconductor UART.
3470 *
3471 * If we have to do this here because some non-National
3472 * Semiconductor clone chips lock up if you try writing to the
3473 * LSR register (which serial_icr_read does)
3474 */
3475 if (state->type == PORT_16550A) {
3476 /*
3477 * EFR [4] must be set else this test fails
3478 *
3479 * This shouldn't be necessary, but Mike Hudson
3480 * (Exoray@isys.ca) claims that it's needed for 952
3481 * dual UART's (which are not recommended for new designs).
3482 */
3483 serial_out(info, UART_LCR, 0xBF);
3484 serial_out(info, UART_EFR, 0x10);
3485 serial_out(info, UART_LCR, 0x00);
3486 /* Check for Oxford Semiconductor 16C950 */
3487 scratch = serial_icr_read(info, UART_ID1);
3488 scratch2 = serial_icr_read(info, UART_ID2);
3489 scratch3 = serial_icr_read(info, UART_ID3);
3490
3491 if (scratch == 0x16 && scratch2 == 0xC9 &&
3492 (scratch3 == 0x50 || scratch3 == 0x52 ||
3493 scratch3 == 0x54)) {
3494 state->type = PORT_16C950;
3495 state->revision = serial_icr_read(info, UART_REV) |
3496 (scratch3 << 8);
3497 return;
3498 }
3499 }
3500
3501 /*
3502 * We check for a XR16C850 by setting DLL and DLM to 0, and
3503 * then reading back DLL and DLM. If DLM reads back 0x10,
3504 * then the UART is a XR16C850 and the DLL contains the chip
3505 * revision. If DLM reads back 0x14, then the UART is a
3506 * XR16C854.
3507 *
3508 */
3509 serial_outp(info, UART_LCR, UART_LCR_DLAB);
3510 serial_outp(info, UART_DLL, 0);
3511 serial_outp(info, UART_DLM, 0);
3512 state->revision = serial_inp(info, UART_DLL);
3513 scratch = serial_inp(info, UART_DLM);
3514 serial_outp(info, UART_LCR, 0);
3515 if (scratch == 0x10 || scratch == 0x14) {
3516 state->type = PORT_16850;
3517 return;
3518 }
3519
3520 /*
3521 * We distinguish between the '654 and the '650 by counting
3522 * how many bytes are in the FIFO. I'm using this for now,
3523 * since that's the technique that was sent to me in the
3524 * serial driver update, but I'm not convinced this works.
3525 * I've had problems doing this in the past. -TYT
3526 */
3527 if (size_fifo(info) == 64)
3528 state->type = PORT_16654;
3529 else
3530 state->type = PORT_16650V2;
3531 }
3532
3533 /*
3534 * This routine is called by rs_init() to initialize a specific serial
3535 * port. It determines what type of UART chip this serial port is
3536 * using: 8250, 16450, 16550, 16550A. The important question is
3537 * whether or not this UART is a 16550A or not, since this will
3538 * determine whether or not we can use its FIFO features or not.
3539 */
3540 static void autoconfig(struct serial_state * state)
3541 {
3542 unsigned char status1, status2, scratch, scratch2, scratch3;
3543 unsigned char save_lcr, save_mcr;
3544 struct async_struct *info, scr_info;
3545 unsigned long flags;
3546
3547 state->type = PORT_UNKNOWN;
3548
3549 #ifdef SERIAL_DEBUG_AUTOCONF
3550 printk("Testing ttyS%d (0x%04lx, 0x%04x)...\n", state->line,
3551 state->port, (unsigned) state->iomem_base);
3552 #endif
3553
3554 if (!CONFIGURED_SERIAL_PORT(state))
3555 return;
3556
3557 info = &scr_info; /* This is just for serial_{in,out} */
3558
3559 info->magic = SERIAL_MAGIC;
3560 info->state = state;
3561 info->port = state->port;
3562 info->flags = state->flags;
3563 #ifdef CONFIG_HUB6
3564 info->hub6 = state->hub6;
3565 #endif
3566 info->io_type = state->io_type;
3567 info->iomem_base = state->iomem_base;
3568 info->iomem_reg_shift = state->iomem_reg_shift;
3569
3570 save_flags(flags); cli();
3571
3572 if (!(state->flags & ASYNC_BUGGY_UART) &&
3573 !state->iomem_base) {
3574 /*
3575 * Do a simple existence test first; if we fail this,
3576 * there's no point trying anything else.
3577 *
3578 * 0x80 is used as a nonsense port to prevent against
3579 * false positives due to ISA bus float. The
3580 * assumption is that 0x80 is a non-existent port;
3581 * which should be safe since include/asm/io.h also
3582 * makes this assumption.
3583 */
3584 scratch = serial_inp(info, UART_IER);
3585 serial_outp(info, UART_IER, 0);
3586 #ifdef __i386__
3587 outb(0xff, 0x080);
3588 #endif
3589 scratch2 = serial_inp(info, UART_IER);
3590 serial_outp(info, UART_IER, 0x0F);
3591 #ifdef __i386__
3592 outb(0, 0x080);
3593 #endif
3594 scratch3 = serial_inp(info, UART_IER);
3595 serial_outp(info, UART_IER, scratch);
3596 if (scratch2 || scratch3 != 0x0F) {
3597 #ifdef SERIAL_DEBUG_AUTOCONF
3598 printk("serial: ttyS%d: simple autoconfig failed "
3599 "(%02x, %02x)\n", state->line,
3600 scratch2, scratch3);
3601 #endif
3602 restore_flags(flags);
3603 return; /* We failed; there's nothing here */
3604 }
3605 }
3606
3607 save_mcr = serial_in(info, UART_MCR);
3608 save_lcr = serial_in(info, UART_LCR);
3609
3610 /*
3611 * Check to see if a UART is really there. Certain broken
3612 * internal modems based on the Rockwell chipset fail this
3613 * test, because they apparently don't implement the loopback
3614 * test mode. So this test is skipped on the COM 1 through
3615 * COM 4 ports. This *should* be safe, since no board
3616 * manufacturer would be stupid enough to design a board
3617 * that conflicts with COM 1-4 --- we hope!
3618 */
3619 if (!(state->flags & ASYNC_SKIP_TEST)) {
3620 serial_outp(info, UART_MCR, UART_MCR_LOOP | 0x0A);
3621 status1 = serial_inp(info, UART_MSR) & 0xF0;
3622 serial_outp(info, UART_MCR, save_mcr);
3623 if (status1 != 0x90) {
3624 #ifdef SERIAL_DEBUG_AUTOCONF
3625 printk("serial: ttyS%d: no UART loopback failed\n",
3626 state->line);
3627 #endif
3628 restore_flags(flags);
3629 return;
3630 }
3631 }
3632 serial_outp(info, UART_LCR, 0xBF); /* set up for StarTech test */
3633 serial_outp(info, UART_EFR, 0); /* EFR is the same as FCR */
3634 serial_outp(info, UART_LCR, 0);
3635 serial_outp(info, UART_FCR, UART_FCR_ENABLE_FIFO);
3636 scratch = serial_in(info, UART_IIR) >> 6;
3637 switch (scratch) {
3638 case 0:
3639 state->type = PORT_16450;
3640 break;
3641 case 1:
3642 state->type = PORT_UNKNOWN;
3643 break;
3644 case 2:
3645 state->type = PORT_16550;
3646 break;
3647 case 3:
3648 state->type = PORT_16550A;
3649 break;
3650 }
3651 if (state->type == PORT_16550A) {
3652 /* Check for Startech UART's */
3653 serial_outp(info, UART_LCR, UART_LCR_DLAB);
3654 if (serial_in(info, UART_EFR) == 0) {
3655 state->type = PORT_16650;
3656 } else {
3657 serial_outp(info, UART_LCR, 0xBF);
3658 if (serial_in(info, UART_EFR) == 0)
3659 autoconfig_startech_uarts(info, state, flags);
3660 }
3661 }
3662 if (state->type == PORT_16550A) {
3663 /* Check for TI 16750 */
3664 serial_outp(info, UART_LCR, save_lcr | UART_LCR_DLAB);
3665 serial_outp(info, UART_FCR,
3666 UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE);
3667 scratch = serial_in(info, UART_IIR) >> 5;
3668 if (scratch == 7) {
3669 /*
3670 * If this is a 16750, and not a cheap UART
3671 * clone, then it should only go into 64 byte
3672 * mode if the UART_FCR7_64BYTE bit was set
3673 * while UART_LCR_DLAB was latched.
3674 */
3675 serial_outp(info, UART_FCR, UART_FCR_ENABLE_FIFO);
3676 serial_outp(info, UART_LCR, 0);
3677 serial_outp(info, UART_FCR,
3678 UART_FCR_ENABLE_FIFO | UART_FCR7_64BYTE);
3679 scratch = serial_in(info, UART_IIR) >> 5;
3680 if (scratch == 6)
3681 state->type = PORT_16750;
3682 }
3683 serial_outp(info, UART_FCR, UART_FCR_ENABLE_FIFO);
3684 }
3685 #if defined(CONFIG_SERIAL_RSA) && defined(MODULE)
3686 if (state->type == PORT_16550A) {
3687 int i;
3688
3689 for (i = 0 ; i < PORT_RSA_MAX ; ++i) {
3690 if (!probe_rsa[i] && !force_rsa[i])
3691 break;
3692 if (((probe_rsa[i] != state->port) ||
3693 check_region(state->port + UART_RSA_BASE, 16)) &&
3694 (force_rsa[i] != state->port))
3695 continue;
3696 if (!enable_rsa(info))
3697 continue;
3698 state->type = PORT_RSA;
3699 state->baud_base = SERIAL_RSA_BAUD_BASE;
3700 break;
3701 }
3702 }
3703 #endif
3704 serial_outp(info, UART_LCR, save_lcr);
3705 if (state->type == PORT_16450) {
3706 scratch = serial_in(info, UART_SCR);
3707 serial_outp(info, UART_SCR, 0xa5);
3708 status1 = serial_in(info, UART_SCR);
3709 serial_outp(info, UART_SCR, 0x5a);
3710 status2 = serial_in(info, UART_SCR);
3711 serial_outp(info, UART_SCR, scratch);
3712
3713 if ((status1 != 0xa5) || (status2 != 0x5a))
3714 state->type = PORT_8250;
3715 }
3716 state->xmit_fifo_size = uart_config[state->type].dfl_xmit_fifo_size;
3717
3718 if (state->type == PORT_UNKNOWN) {
3719 restore_flags(flags);
3720 return;
3721 }
3722
3723 if (info->port) {
3724 #ifdef CONFIG_SERIAL_RSA
3725 if (state->type == PORT_RSA)
3726 request_region(info->port + UART_RSA_BASE, 16,
3727 "serial_rsa(auto)");
3728 else
3729 #endif
3730 request_region(info->port,8,"serial(auto)");
3731 }
3732
3733 /*
3734 * Reset the UART.
3735 */
3736 #ifdef CONFIG_SERIAL_RSA
3737 if (state->type == PORT_RSA)
3738 serial_outp(info, UART_RSA_FRR, 0);
3739 #endif
3740 serial_outp(info, UART_MCR, save_mcr);
3741 serial_outp(info, UART_FCR, (UART_FCR_ENABLE_FIFO |
3742 UART_FCR_CLEAR_RCVR |
3743 UART_FCR_CLEAR_XMIT));
3744 serial_outp(info, UART_FCR, 0);
3745 (void)serial_in(info, UART_RX);
3746 serial_outp(info, UART_IER, 0);
3747
3748 restore_flags(flags);
3749 }
3750
3751 int register_serial(struct serial_struct *req);
3752 void unregister_serial(int line);
3753
3754 #if (LINUX_VERSION_CODE > 0x20100)
3755 EXPORT_SYMBOL(register_serial);
3756 EXPORT_SYMBOL(unregister_serial);
3757 #else
3758 static struct symbol_table serial_syms = {
3759 #include <linux/symtab_begin.h>
3760 X(register_serial),
3761 X(unregister_serial),
3762 #include <linux/symtab_end.h>
3763 };
3764 #endif
3765
3766
3767 #if defined(ENABLE_SERIAL_PCI) || defined(ENABLE_SERIAL_PNP)
3768
3769 static void __init printk_pnp_dev_id(unsigned short vendor,
3770 unsigned short device)
3771 {
3772 printk("%c%c%c%x%x%x%x",
3773 'A' + ((vendor >> 2) & 0x3f) - 1,
3774 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
3775 'A' + ((vendor >> 8) & 0x1f) - 1,
3776 (device >> 4) & 0x0f,
3777 device & 0x0f,
3778 (device >> 12) & 0x0f,
3779 (device >> 8) & 0x0f);
3780 }
3781
3782 static _INLINE_ int get_pci_port(struct pci_dev *dev,
3783 struct pci_board *board,
3784 struct serial_struct *req,
3785 int idx)
3786 {
3787 unsigned long port;
3788 int base_idx;
3789 int max_port;
3790
3791 base_idx = SPCI_FL_GET_BASE(board->flags);
3792 if (board->flags & SPCI_FL_BASE_TABLE)
3793 base_idx += idx;
3794
3795 if (board->flags & SPCI_FL_REGION_SZ_CAP) {
3796 max_port = pci_resource_len(dev, base_idx) / 8;
3797 if (idx >= max_port)
3798 return 1;
3799 }
3800
3801 port = pci_resource_start(dev, base_idx) + board->first_uart_offset;
3802
3803 if ((board->flags & SPCI_FL_BASE_TABLE) == 0)
3804 port += idx * (board->uart_offset ? board->uart_offset : 8);
3805
3806 if (IS_PCI_REGION_IOPORT(dev, base_idx)) {
3807 req->port = port;
3808 if (HIGH_BITS_OFFSET)
3809 req->port_high = port >> HIGH_BITS_OFFSET;
3810 else
3811 req->port_high = 0;
3812 return 0;
3813 }
3814 req->io_type = SERIAL_IO_MEM;
3815 req->iomem_base = ioremap(port, board->uart_offset);
3816 req->iomem_reg_shift = board->reg_shift;
3817 req->port = 0;
3818 return 0;
3819 }
3820
3821 static _INLINE_ int get_pci_irq(struct pci_dev *dev,
3822 struct pci_board *board,
3823 int idx)
3824 {
3825 int base_idx;
3826
3827 if ((board->flags & SPCI_FL_IRQRESOURCE) == 0)
3828 return dev->irq;
3829
3830 base_idx = SPCI_FL_GET_IRQBASE(board->flags);
3831 if (board->flags & SPCI_FL_IRQ_TABLE)
3832 base_idx += idx;
3833
3834 return PCI_IRQ_RESOURCE(dev, base_idx);
3835 }
3836
3837 /*
3838 * Common enabler code shared by both PCI and ISAPNP probes
3839 */
3840 static void __init start_pci_pnp_board(struct pci_dev *dev,
3841 struct pci_board *board)
3842 {
3843 int k, line;
3844 struct serial_struct serial_req;
3845 int base_baud;
3846
3847 if (PREPARE_FUNC(dev) && (PREPARE_FUNC(dev))(dev) < 0) {
3848 printk("serial: PNP device '");
3849 printk_pnp_dev_id(board->vendor, board->device);
3850 printk("' prepare failed\n");
3851 return;
3852 }
3853
3854 if (ACTIVATE_FUNC(dev) && (ACTIVATE_FUNC(dev))(dev) < 0) {
3855 printk("serial: PNP device '");
3856 printk_pnp_dev_id(board->vendor, board->device);
3857 printk("' activate failed\n");
3858 return;
3859 }
3860
3861 if (!(board->flags & SPCI_FL_ISPNP) && pci_enable_device(dev)) {
3862 printk("serial: PCI device enable failed\n");
3863 return;
3864 }
3865
3866 /*
3867 * Run the initialization function, if any
3868 */
3869 if (board->init_fn && ((board->init_fn)(dev, board, 1) != 0))
3870 return;
3871
3872 #ifdef MODULE
3873 /*
3874 * Register the serial board in the array if we need to
3875 * shutdown the board on a module unload.
3876 */
3877 if (DEACTIVATE_FUNC(dev) || board->init_fn) {
3878 if (serial_pci_board_idx >= NR_PCI_BOARDS)
3879 return;
3880 serial_pci_board[serial_pci_board_idx].board = *board;
3881 serial_pci_board[serial_pci_board_idx].dev = dev;
3882 serial_pci_board_idx++;
3883 }
3884 #endif
3885
3886 base_baud = board->base_baud;
3887 if (!base_baud)
3888 base_baud = BASE_BAUD;
3889 memset(&serial_req, 0, sizeof(serial_req));
3890
3891 for (k=0; k < board->num_ports; k++) {
3892 serial_req.irq = get_pci_irq(dev, board, k);
3893 if (get_pci_port(dev, board, &serial_req, k))
3894 break;
3895 serial_req.flags = ASYNC_SKIP_TEST | ASYNC_AUTOPROBE;
3896 #ifdef SERIAL_DEBUG_PCI
3897 printk("Setup PCI/PNP port: port %x, irq %d, type %d\n",
3898 serial_req.port, serial_req.irq, serial_req.io_type);
3899 #endif
3900 line = register_serial(&serial_req);
3901 if (line < 0)
3902 break;
3903 rs_table[line].baud_base = base_baud;
3904 }
3905 }
3906 #endif /* ENABLE_SERIAL_PCI || ENABLE_SERIAL_PNP */
3907
3908 #ifdef ENABLE_SERIAL_PCI
3909 /*
3910 * Some PCI serial cards using the PLX 9050 PCI interface chip require
3911 * that the card interrupt be explicitly enabled or disabled. This
3912 * seems to be mainly needed on card using the PLX which also use I/O
3913 * mapped memory.
3914 */
3915 static int
3916 #ifndef MODULE
3917 __init
3918 #endif
3919 pci_plx9050_fn(struct pci_dev *dev, struct pci_board *board, int enable)
3920 {
3921 u8 data, *p, irq_config;
3922 int pci_config;
3923
3924 irq_config = 0x41;
3925 pci_config = PCI_COMMAND_MEMORY;
3926 if (dev->vendor == PCI_VENDOR_ID_PANACOM)
3927 irq_config = 0x43;
3928 if ((dev->vendor == PCI_VENDOR_ID_PLX) &&
3929 (dev->device == PCI_VENDOR_ID_PLX_ROMULUS)) {
3930 /*
3931 * As the megawolf cards have the int pins active
3932 * high, and have 2 UART chips, both ints must be
3933 * enabled on the 9050. Also, the UARTS are set in
3934 * 16450 mode by default, so we have to enable the
3935 * 16C950 'enhanced' mode so that we can use the deep
3936 * FIFOs
3937 */
3938 irq_config = 0x5b;
3939 pci_config = PCI_COMMAND_MEMORY | PCI_COMMAND_IO;
3940 }
3941
3942 pci_read_config_byte(dev, PCI_COMMAND, &data);
3943
3944 if (enable)
3945 pci_write_config_byte(dev, PCI_COMMAND,
3946 data | pci_config);
3947
3948 /* enable/disable interrupts */
3949 p = ioremap(pci_resource_start(dev, 0), 0x80);
3950 writel(enable ? irq_config : 0x00, (unsigned long)p + 0x4c);
3951 iounmap(p);
3952
3953 if (!enable)
3954 pci_write_config_byte(dev, PCI_COMMAND,
3955 data & ~pci_config);
3956 return 0;
3957 }
3958
3959
3960 /*
3961 * SIIG serial cards have an PCI interface chip which also controls
3962 * the UART clocking frequency. Each UART can be clocked independently
3963 * (except cards equiped with 4 UARTs) and initial clocking settings
3964 * are stored in the EEPROM chip. It can cause problems because this
3965 * version of serial driver doesn't support differently clocked UART's
3966 * on single PCI card. To prevent this, initialization functions set
3967 * high frequency clocking for all UART's on given card. It is safe (I
3968 * hope) because it doesn't touch EEPROM settings to prevent conflicts
3969 * with other OSes (like M$ DOS).
3970 *
3971 * SIIG support added by Andrey Panin <pazke@mail.tp.ru>, 10/1999
3972 *
3973 * There is two family of SIIG serial cards with different PCI
3974 * interface chip and different configuration methods:
3975 * - 10x cards have control registers in IO and/or memory space;
3976 * - 20x cards have control registers in standard PCI configuration space.
3977 */
3978
3979 #define PCI_DEVICE_ID_SIIG_1S_10x (PCI_DEVICE_ID_SIIG_1S_10x_550 & 0xfffc)
3980 #define PCI_DEVICE_ID_SIIG_2S_10x (PCI_DEVICE_ID_SIIG_2S_10x_550 & 0xfff8)
3981
3982 static int
3983 #ifndef MODULE
3984 __init
3985 #endif
3986 pci_siig10x_fn(struct pci_dev *dev, struct pci_board *board, int enable)
3987 {
3988 u16 data, *p;
3989
3990 if (!enable) return 0;
3991
3992 p = ioremap(pci_resource_start(dev, 0), 0x80);
3993
3994 switch (dev->device & 0xfff8) {
3995 case PCI_DEVICE_ID_SIIG_1S_10x: /* 1S */
3996 data = 0xffdf;
3997 break;
3998 case PCI_DEVICE_ID_SIIG_2S_10x: /* 2S, 2S1P */
3999 data = 0xf7ff;
4000 break;
4001 default: /* 1S1P, 4S */
4002 data = 0xfffb;
4003 break;
4004 }
4005
4006 writew(readw((unsigned long) p + 0x28) & data, (unsigned long) p + 0x28);
4007 iounmap(p);
4008 return 0;
4009 }
4010
4011 #define PCI_DEVICE_ID_SIIG_2S_20x (PCI_DEVICE_ID_SIIG_2S_20x_550 & 0xfffc)
4012 #define PCI_DEVICE_ID_SIIG_2S1P_20x (PCI_DEVICE_ID_SIIG_2S1P_20x_550 & 0xfffc)
4013
4014 static int
4015 #ifndef MODULE
4016 __init
4017 #endif
4018 pci_siig20x_fn(struct pci_dev *dev, struct pci_board *board, int enable)
4019 {
4020 u8 data;
4021
4022 if (!enable) return 0;
4023
4024 /* Change clock frequency for the first UART. */
4025 pci_read_config_byte(dev, 0x6f, &data);
4026 pci_write_config_byte(dev, 0x6f, data & 0xef);
4027
4028 /* If this card has 2 UART, we have to do the same with second UART. */
4029 if (((dev->device & 0xfffc) == PCI_DEVICE_ID_SIIG_2S_20x) ||
4030 ((dev->device & 0xfffc) == PCI_DEVICE_ID_SIIG_2S1P_20x)) {
4031 pci_read_config_byte(dev, 0x73, &data);
4032 pci_write_config_byte(dev, 0x73, data & 0xef);
4033 }
4034 return 0;
4035 }
4036
4037 /* Added for EKF Intel i960 serial boards */
4038 static int
4039 #ifndef MODULE
4040 __init
4041 #endif
4042 pci_inteli960ni_fn(struct pci_dev *dev,
4043 struct pci_board *board,
4044 int enable)
4045 {
4046 unsigned long oldval;
4047
4048 if (!(board->subdevice & 0x1000))
4049 return(-1);
4050
4051 if (!enable) /* is there something to deinit? */
4052 return(0);
4053
4054 #ifdef SERIAL_DEBUG_PCI
4055 printk(KERN_DEBUG " Subsystem ID %lx (intel 960)\n",
4056 (unsigned long) board->subdevice);
4057 #endif
4058 /* is firmware started? */
4059 pci_read_config_dword(dev, 0x44, (void*) &oldval);
4060 if (oldval == 0x00001000L) { /* RESET value */
4061 printk(KERN_DEBUG "Local i960 firmware missing");
4062 return(-1);
4063 }
4064 return(0);
4065 }
4066
4067
4068 /*
4069 * This is the configuration table for all of the PCI serial boards
4070 * which we support.
4071 */
4072 static struct pci_board pci_boards[] __initdata = {
4073 /*
4074 * Vendor ID, Device ID,
4075 * Subvendor ID, Subdevice ID,
4076 * PCI Flags, Number of Ports, Base (Maximum) Baud Rate,
4077 * Offset to get to next UART's registers,
4078 * Register shift to use for memory-mapped I/O,
4079 * Initialization function, first UART offset
4080 */
4081 { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V960,
4082 PCI_SUBVENDOR_ID_CONNECT_TECH,
4083 PCI_SUBDEVICE_ID_CONNECT_TECH_BH8_232,
4084 SPCI_FL_BASE1, 8, 1382400 },
4085 { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V960,
4086 PCI_SUBVENDOR_ID_CONNECT_TECH,
4087 PCI_SUBDEVICE_ID_CONNECT_TECH_BH4_232,
4088 SPCI_FL_BASE1, 4, 1382400 },
4089 { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V960,
4090 PCI_SUBVENDOR_ID_CONNECT_TECH,
4091 PCI_SUBDEVICE_ID_CONNECT_TECH_BH2_232,
4092 SPCI_FL_BASE1, 2, 1382400 },
4093 { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V960V2,
4094 PCI_SUBVENDOR_ID_CONNECT_TECH,
4095 PCI_SUBDEVICE_ID_CONNECT_TECH_BH8_232,
4096 SPCI_FL_BASE1, 8, 1382400 },
4097 { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V960V2,
4098 PCI_SUBVENDOR_ID_CONNECT_TECH,
4099 PCI_SUBDEVICE_ID_CONNECT_TECH_BH4_232,
4100 SPCI_FL_BASE1, 4, 1382400 },
4101 { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V960V2,
4102 PCI_SUBVENDOR_ID_CONNECT_TECH,
4103 PCI_SUBDEVICE_ID_CONNECT_TECH_BH2_232,
4104 SPCI_FL_BASE1, 2, 1382400 },
4105 { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V960,
4106 PCI_SUBVENDOR_ID_CONNECT_TECH,
4107 PCI_SUBDEVICE_ID_CONNECT_TECH_BH8_485,
4108 SPCI_FL_BASE1, 8, 921600 },
4109 { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V960,
4110 PCI_SUBVENDOR_ID_CONNECT_TECH,
4111 PCI_SUBDEVICE_ID_CONNECT_TECH_BH8_485_4_4,
4112 SPCI_FL_BASE1, 8, 921600 },
4113 { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V960,
4114 PCI_SUBVENDOR_ID_CONNECT_TECH,
4115 PCI_SUBDEVICE_ID_CONNECT_TECH_BH4_485,
4116 SPCI_FL_BASE1, 4, 921600 },
4117 { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V960,
4118 PCI_SUBVENDOR_ID_CONNECT_TECH,
4119 PCI_SUBDEVICE_ID_CONNECT_TECH_BH4_485_2_2,
4120 SPCI_FL_BASE1, 4, 921600 },
4121 { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V960,
4122 PCI_SUBVENDOR_ID_CONNECT_TECH,
4123 PCI_SUBDEVICE_ID_CONNECT_TECH_BH2_485,
4124 SPCI_FL_BASE1, 2, 921600 },
4125 { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V960V2,
4126 PCI_SUBVENDOR_ID_CONNECT_TECH,
4127 PCI_SUBDEVICE_ID_CONNECT_TECH_BH8_485,
4128 SPCI_FL_BASE1, 8, 921600 },
4129 { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V960V2,
4130 PCI_SUBVENDOR_ID_CONNECT_TECH,
4131 PCI_SUBDEVICE_ID_CONNECT_TECH_BH8_485_4_4,
4132 SPCI_FL_BASE1, 8, 921600 },
4133 { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V960V2,
4134 PCI_SUBVENDOR_ID_CONNECT_TECH,
4135 PCI_SUBDEVICE_ID_CONNECT_TECH_BH4_485,
4136 SPCI_FL_BASE1, 4, 921600 },
4137 { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V960V2,
4138 PCI_SUBVENDOR_ID_CONNECT_TECH,
4139 PCI_SUBDEVICE_ID_CONNECT_TECH_BH4_485_2_2,
4140 SPCI_FL_BASE1, 4, 921600 },
4141 { PCI_VENDOR_ID_V3, PCI_DEVICE_ID_V3_V960V2,
4142 PCI_SUBVENDOR_ID_CONNECT_TECH,
4143 PCI_SUBDEVICE_ID_CONNECT_TECH_BH2_485,
4144 SPCI_FL_BASE1, 2, 921600 },
4145 { PCI_VENDOR_ID_SEALEVEL, PCI_DEVICE_ID_SEALEVEL_U530,
4146 PCI_ANY_ID, PCI_ANY_ID,
4147 SPCI_FL_BASE2 | SPCI_FL_BASE_TABLE, 1, 115200 },
4148 { PCI_VENDOR_ID_SEALEVEL, PCI_DEVICE_ID_SEALEVEL_UCOMM2,
4149 PCI_ANY_ID, PCI_ANY_ID,
4150 SPCI_FL_BASE2 | SPCI_FL_BASE_TABLE, 2, 115200 },
4151 { PCI_VENDOR_ID_SEALEVEL, PCI_DEVICE_ID_SEALEVEL_UCOMM422,
4152 PCI_ANY_ID, PCI_ANY_ID,
4153 SPCI_FL_BASE2 | SPCI_FL_BASE_TABLE, 4, 115200 },
4154 { PCI_VENDOR_ID_SEALEVEL, PCI_DEVICE_ID_SEALEVEL_UCOMM232,
4155 PCI_ANY_ID, PCI_ANY_ID,
4156 SPCI_FL_BASE2 | SPCI_FL_BASE_TABLE, 2, 115200 },
4157 { PCI_VENDOR_ID_SEALEVEL, PCI_DEVICE_ID_SEALEVEL_COMM4,
4158 PCI_ANY_ID, PCI_ANY_ID,
4159 SPCI_FL_BASE2 | SPCI_FL_BASE_TABLE, 4, 115200 },
4160 { PCI_VENDOR_ID_SEALEVEL, PCI_DEVICE_ID_SEALEVEL_COMM8,
4161 PCI_ANY_ID, PCI_ANY_ID,
4162 SPCI_FL_BASE2, 8, 115200 },
4163 { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_GTEK_SERIAL2,
4164 PCI_ANY_ID, PCI_ANY_ID,
4165 SPCI_FL_BASE2 | SPCI_FL_BASE_TABLE, 2, 115200 },
4166 { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_SPCOM200,
4167 PCI_ANY_ID, PCI_ANY_ID,
4168 SPCI_FL_BASE2 | SPCI_FL_BASE_TABLE, 2, 921600 },
4169 /* VScom SPCOM800, from sl@s.pl */
4170 { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_SPCOM800,
4171 PCI_ANY_ID, PCI_ANY_ID,
4172 SPCI_FL_BASE2, 8, 921600 },
4173 { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
4174 PCI_SUBVENDOR_ID_KEYSPAN,
4175 PCI_SUBDEVICE_ID_KEYSPAN_SX2,
4176 SPCI_FL_BASE2, 2, 921600, /* IOMEM */
4177 0x400, 7, pci_plx9050_fn },
4178 { PCI_VENDOR_ID_PANACOM, PCI_DEVICE_ID_PANACOM_QUADMODEM,
4179 PCI_ANY_ID, PCI_ANY_ID,
4180 SPCI_FL_BASE2 | SPCI_FL_BASE_TABLE, 4, 921600,
4181 0x400, 7, pci_plx9050_fn },
4182 { PCI_VENDOR_ID_PANACOM, PCI_DEVICE_ID_PANACOM_DUALMODEM,
4183 PCI_ANY_ID, PCI_ANY_ID,
4184 SPCI_FL_BASE2 | SPCI_FL_BASE_TABLE, 2, 921600,
4185 0x400, 7, pci_plx9050_fn },
4186 { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
4187 PCI_SUBVENDOR_ID_CHASE_PCIFAST,
4188 PCI_SUBDEVICE_ID_CHASE_PCIFAST4,
4189 SPCI_FL_BASE2, 4, 460800 },
4190 { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
4191 PCI_SUBVENDOR_ID_CHASE_PCIFAST,
4192 PCI_SUBDEVICE_ID_CHASE_PCIFAST8,
4193 SPCI_FL_BASE2, 8, 460800 },
4194 { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
4195 PCI_SUBVENDOR_ID_CHASE_PCIFAST,
4196 PCI_SUBDEVICE_ID_CHASE_PCIFAST16,
4197 SPCI_FL_BASE2, 16, 460800 },
4198 { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
4199 PCI_SUBVENDOR_ID_CHASE_PCIFAST,
4200 PCI_SUBDEVICE_ID_CHASE_PCIFAST16FMC,
4201 SPCI_FL_BASE2, 16, 460800 },
4202 { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
4203 PCI_SUBVENDOR_ID_CHASE_PCIRAS,
4204 PCI_SUBDEVICE_ID_CHASE_PCIRAS4,
4205 SPCI_FL_BASE2, 4, 460800 },
4206 { PCI_VENDOR_ID_PLX, PCI_DEVICE_ID_PLX_9050,
4207 PCI_SUBVENDOR_ID_CHASE_PCIRAS,
4208 PCI_SUBDEVICE_ID_CHASE_PCIRAS8,
4209 SPCI_FL_BASE2, 8, 460800 },
4210 /* Megawolf Romulus PCI Serial Card, from Mike Hudson */
4211 /* (Exoray@isys.ca) */
4212 { PCI_VENDOR_ID_PLX, PCI_VENDOR_ID_PLX_ROMULUS,
4213 0x10b5, 0x106a,
4214 SPCI_FL_BASE2, 4, 921600,
4215 0x20, 2, pci_plx9050_fn, 0x03 },
4216 { PCI_VENDOR_ID_QUATECH, PCI_DEVICE_ID_QUATECH_QSC100,
4217 PCI_ANY_ID, PCI_ANY_ID,
4218 SPCI_FL_BASE1, 4, 115200 },
4219 { PCI_VENDOR_ID_QUATECH, PCI_DEVICE_ID_QUATECH_DSC100,
4220 PCI_ANY_ID, PCI_ANY_ID,
4221 SPCI_FL_BASE1, 2, 115200 },
4222 { PCI_VENDOR_ID_QUATECH, PCI_DEVICE_ID_QUATECH_ESC100D,
4223 PCI_ANY_ID, PCI_ANY_ID,
4224 SPCI_FL_BASE1, 8, 115200 },
4225 { PCI_VENDOR_ID_QUATECH, PCI_DEVICE_ID_QUATECH_ESC100M,
4226 PCI_ANY_ID, PCI_ANY_ID,
4227 SPCI_FL_BASE1, 8, 115200 },
4228 { PCI_VENDOR_ID_SPECIALIX, PCI_DEVICE_ID_OXSEMI_16PCI954,
4229 PCI_VENDOR_ID_SPECIALIX, PCI_SUBDEVICE_ID_SPECIALIX_SPEED4,
4230 SPCI_FL_BASE0 , 4, 921600 },
4231 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI954,
4232 PCI_ANY_ID, PCI_ANY_ID,
4233 SPCI_FL_BASE0 , 4, 115200 },
4234 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI952,
4235 PCI_ANY_ID, PCI_ANY_ID,
4236 SPCI_FL_BASE0 , 2, 115200 },
4237 /* This board uses the size of PCI Base region 0 to
4238 * signal now many ports are available */
4239 { PCI_VENDOR_ID_OXSEMI, PCI_DEVICE_ID_OXSEMI_16PCI95N,
4240 PCI_ANY_ID, PCI_ANY_ID,
4241 SPCI_FL_BASE0 | SPCI_FL_REGION_SZ_CAP, 32, 115200 },
4242 { PCI_VENDOR_ID_TIMEDIA, PCI_DEVICE_ID_TIMEDIA_1889,
4243 PCI_ANY_ID, PCI_ANY_ID,
4244 SPCI_FL_BASE0 , 2, 921600 },
4245 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_DSERIAL,
4246 PCI_ANY_ID, PCI_ANY_ID,
4247 SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 2, 115200 },
4248 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_QUATRO_A,
4249 PCI_ANY_ID, PCI_ANY_ID,
4250 SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 2, 115200 },
4251 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_QUATRO_B,
4252 PCI_ANY_ID, PCI_ANY_ID,
4253 SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 2, 115200 },
4254 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_PORT_PLUS,
4255 PCI_ANY_ID, PCI_ANY_ID,
4256 SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 2, 460800 },
4257 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_QUAD_A,
4258 PCI_ANY_ID, PCI_ANY_ID,
4259 SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 2, 460800 },
4260 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_QUAD_B,
4261 PCI_ANY_ID, PCI_ANY_ID,
4262 SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 2, 460800 },
4263 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_SSERIAL,
4264 PCI_ANY_ID, PCI_ANY_ID,
4265 SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 1, 115200 },
4266 { PCI_VENDOR_ID_LAVA, PCI_DEVICE_ID_LAVA_PORT_650,
4267 PCI_ANY_ID, PCI_ANY_ID,
4268 SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 1, 460800 },
4269 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S_10x_550,
4270 PCI_ANY_ID, PCI_ANY_ID,
4271 SPCI_FL_BASE2, 1, 460800,
4272 0, 0, pci_siig10x_fn },
4273 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S_10x_650,
4274 PCI_ANY_ID, PCI_ANY_ID,
4275 SPCI_FL_BASE2, 1, 460800,
4276 0, 0, pci_siig10x_fn },
4277 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S_10x_850,
4278 PCI_ANY_ID, PCI_ANY_ID,
4279 SPCI_FL_BASE2, 1, 460800,
4280 0, 0, pci_siig10x_fn },
4281 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S1P_10x_550,
4282 PCI_ANY_ID, PCI_ANY_ID,
4283 SPCI_FL_BASE2, 1, 921600,
4284 0, 0, pci_siig10x_fn },
4285 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S1P_10x_650,
4286 PCI_ANY_ID, PCI_ANY_ID,
4287 SPCI_FL_BASE2, 1, 921600,
4288 0, 0, pci_siig10x_fn },
4289 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S1P_10x_850,
4290 PCI_ANY_ID, PCI_ANY_ID,
4291 SPCI_FL_BASE2, 1, 921600,
4292 0, 0, pci_siig10x_fn },
4293 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S_10x_550,
4294 PCI_ANY_ID, PCI_ANY_ID,
4295 SPCI_FL_BASE2 | SPCI_FL_BASE_TABLE, 2, 921600,
4296 0, 0, pci_siig10x_fn },
4297 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S_10x_650,
4298 PCI_ANY_ID, PCI_ANY_ID,
4299 SPCI_FL_BASE2 | SPCI_FL_BASE_TABLE, 2, 921600,
4300 0, 0, pci_siig10x_fn },
4301 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S_10x_850,
4302 PCI_ANY_ID, PCI_ANY_ID,
4303 SPCI_FL_BASE2 | SPCI_FL_BASE_TABLE, 2, 921600,
4304 0, 0, pci_siig10x_fn },
4305 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S1P_10x_550,
4306 PCI_ANY_ID, PCI_ANY_ID,
4307 SPCI_FL_BASE2 | SPCI_FL_BASE_TABLE, 2, 921600,
4308 0, 0, pci_siig10x_fn },
4309 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S1P_10x_650,
4310 PCI_ANY_ID, PCI_ANY_ID,
4311 SPCI_FL_BASE2 | SPCI_FL_BASE_TABLE, 2, 921600,
4312 0, 0, pci_siig10x_fn },
4313 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S1P_10x_850,
4314 PCI_ANY_ID, PCI_ANY_ID,
4315 SPCI_FL_BASE2 | SPCI_FL_BASE_TABLE, 2, 921600,
4316 0, 0, pci_siig10x_fn },
4317 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_4S_10x_550,
4318 PCI_ANY_ID, PCI_ANY_ID,
4319 SPCI_FL_BASE2 | SPCI_FL_BASE_TABLE, 4, 921600,
4320 0, 0, pci_siig10x_fn },
4321 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_4S_10x_650,
4322 PCI_ANY_ID, PCI_ANY_ID,
4323 SPCI_FL_BASE2 | SPCI_FL_BASE_TABLE, 4, 921600,
4324 0, 0, pci_siig10x_fn },
4325 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_4S_10x_850,
4326 PCI_ANY_ID, PCI_ANY_ID,
4327 SPCI_FL_BASE2 | SPCI_FL_BASE_TABLE, 4, 921600,
4328 0, 0, pci_siig10x_fn },
4329 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S_20x_550,
4330 PCI_ANY_ID, PCI_ANY_ID,
4331 SPCI_FL_BASE0, 1, 921600,
4332 0, 0, pci_siig20x_fn },
4333 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S_20x_650,
4334 PCI_ANY_ID, PCI_ANY_ID,
4335 SPCI_FL_BASE0, 1, 921600,
4336 0, 0, pci_siig20x_fn },
4337 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S_20x_850,
4338 PCI_ANY_ID, PCI_ANY_ID,
4339 SPCI_FL_BASE0, 1, 921600,
4340 0, 0, pci_siig20x_fn },
4341 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S1P_20x_550,
4342 PCI_ANY_ID, PCI_ANY_ID,
4343 SPCI_FL_BASE0, 1, 921600,
4344 0, 0, pci_siig20x_fn },
4345 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S1P_20x_650,
4346 PCI_ANY_ID, PCI_ANY_ID,
4347 SPCI_FL_BASE0, 1, 921600,
4348 0, 0, pci_siig20x_fn },
4349 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_1S1P_20x_850,
4350 PCI_ANY_ID, PCI_ANY_ID,
4351 SPCI_FL_BASE0, 1, 921600,
4352 0, 0, pci_siig20x_fn },
4353 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P1S_20x_550,
4354 PCI_ANY_ID, PCI_ANY_ID,
4355 SPCI_FL_BASE0, 1, 921600,
4356 0, 0, pci_siig20x_fn },
4357 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P1S_20x_650,
4358 PCI_ANY_ID, PCI_ANY_ID,
4359 SPCI_FL_BASE0, 1, 921600,
4360 0, 0, pci_siig20x_fn },
4361 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2P1S_20x_850,
4362 PCI_ANY_ID, PCI_ANY_ID,
4363 SPCI_FL_BASE0, 1, 921600,
4364 0, 0, pci_siig20x_fn },
4365 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S_20x_550,
4366 PCI_ANY_ID, PCI_ANY_ID,
4367 SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 2, 921600,
4368 0, 0, pci_siig20x_fn },
4369 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S_20x_650,
4370 PCI_ANY_ID, PCI_ANY_ID,
4371 SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 2, 921600,
4372 0, 0, pci_siig20x_fn },
4373 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S_20x_850,
4374 PCI_ANY_ID, PCI_ANY_ID,
4375 SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 2, 921600,
4376 0, 0, pci_siig20x_fn },
4377 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S1P_20x_550,
4378 PCI_ANY_ID, PCI_ANY_ID,
4379 SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 2, 921600,
4380 0, 0, pci_siig20x_fn },
4381 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S1P_20x_650,
4382 PCI_ANY_ID, PCI_ANY_ID,
4383 SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 2, 921600,
4384 0, 0, pci_siig20x_fn },
4385 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_2S1P_20x_850,
4386 PCI_ANY_ID, PCI_ANY_ID,
4387 SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 2, 921600,
4388 0, 0, pci_siig20x_fn },
4389 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_4S_20x_550,
4390 PCI_ANY_ID, PCI_ANY_ID,
4391 SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 4, 921600,
4392 0, 0, pci_siig20x_fn },
4393 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_4S_20x_650,
4394 PCI_ANY_ID, PCI_ANY_ID,
4395 SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 4, 921600,
4396 0, 0, pci_siig20x_fn },
4397 { PCI_VENDOR_ID_SIIG, PCI_DEVICE_ID_SIIG_4S_20x_850,
4398 PCI_ANY_ID, PCI_ANY_ID,
4399 SPCI_FL_BASE0 | SPCI_FL_BASE_TABLE, 4, 921600,
4400 0, 0, pci_siig20x_fn },
4401 /* Computone devices submitted by Doug McNash dmcnash@computone.com */
4402 { PCI_VENDOR_ID_COMPUTONE, PCI_DEVICE_ID_COMPUTONE_PG,
4403 PCI_SUBVENDOR_ID_COMPUTONE, PCI_SUBDEVICE_ID_COMPUTONE_PG4,
4404 SPCI_FL_BASE0, 4, 921600, /* IOMEM */
4405 0x40, 2, NULL, 0x200 },
4406 { PCI_VENDOR_ID_COMPUTONE, PCI_DEVICE_ID_COMPUTONE_PG,
4407 PCI_SUBVENDOR_ID_COMPUTONE, PCI_SUBDEVICE_ID_COMPUTONE_PG8,
4408 SPCI_FL_BASE0, 8, 921600, /* IOMEM */
4409 0x40, 2, NULL, 0x200 },
4410 { PCI_VENDOR_ID_COMPUTONE, PCI_DEVICE_ID_COMPUTONE_PG,
4411 PCI_SUBVENDOR_ID_COMPUTONE, PCI_SUBDEVICE_ID_COMPUTONE_PG6,
4412 SPCI_FL_BASE0, 6, 921600, /* IOMEM */
4413 0x40, 2, NULL, 0x200 },
4414 /* Digitan DS560-558, from jimd@esoft.com */
4415 { PCI_VENDOR_ID_ATT, PCI_DEVICE_ID_ATT_VENUS_MODEM,
4416 PCI_ANY_ID, PCI_ANY_ID,
4417 SPCI_FL_BASE1, 1, 115200 },
4418 /* 3Com US Robotics 56k Voice Internal PCI model 5610 */
4419 { PCI_VENDOR_ID_USR, 0x1008,
4420 PCI_ANY_ID, PCI_ANY_ID,
4421 SPCI_FL_BASE0, 1, 115200 },
4422 /* Titan Electronic cards */
4423 { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_100,
4424 PCI_ANY_ID, PCI_ANY_ID,
4425 SPCI_FL_BASE0, 1, 921600 },
4426 { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_200,
4427 PCI_ANY_ID, PCI_ANY_ID,
4428 SPCI_FL_BASE0, 2, 921600 },
4429 { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_400,
4430 PCI_ANY_ID, PCI_ANY_ID,
4431 SPCI_FL_BASE0, 4, 921600 },
4432 { PCI_VENDOR_ID_TITAN, PCI_DEVICE_ID_TITAN_800B,
4433 PCI_ANY_ID, PCI_ANY_ID,
4434 SPCI_FL_BASE0, 4, 921600 },
4435 /* EKF addition for i960 Boards form EKF with serial port */
4436 { PCI_VENDOR_ID_INTEL, 0x1960,
4437 0xE4BF, PCI_ANY_ID,
4438 SPCI_FL_BASE0, 32, 921600, /* max 256 ports */
4439 8<<2, 2, pci_inteli960ni_fn, 0x10000},
4440 /* RAStel 2 port modem, gerg@moreton.com.au */
4441 { PCI_VENDOR_ID_MORETON, PCI_DEVICE_ID_RASTEL_2PORT,
4442 PCI_ANY_ID, PCI_ANY_ID,
4443 SPCI_FL_BASE2 | SPCI_FL_BASE_TABLE, 2, 115200 },
4444 /*
4445 * Untested PCI modems, sent in from various folks...
4446 */
4447 /* Elsa Model 56K PCI Modem, from Andreas Rath <arh@01019freenet.de> */
4448 { PCI_VENDOR_ID_ROCKWELL, 0x1004,
4449 0x1048, 0x1500,
4450 SPCI_FL_BASE1, 1, 115200 },
4451 #if 0 /* No definition for PCI_DEVICE_ID_NEC_NILE4 */
4452 /*
4453 * NEC Vrc-5074 (Nile 4) builtin UART.
4454 */
4455 { PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_NILE4,
4456 PCI_ANY_ID, PCI_ANY_ID,
4457 SPCI_FL_BASE0, 1, 520833,
4458 64, 3, NULL, 0x300 },
4459 #endif
4460 /* Generic serial board */
4461 { 0, 0,
4462 0, 0,
4463 SPCI_FL_BASE0, 1, 115200 },
4464 };
4465
4466 /*
4467 * Given a complete unknown PCI device, try to use some heuristics to
4468 * guess what the configuration might be, based on the pitiful PCI
4469 * serial specs. Returns 0 on success, 1 on failure.
4470 */
4471 static int _INLINE_ serial_pci_guess_board(struct pci_dev *dev,
4472 struct pci_board *board)
4473 {
4474 int num_iomem = 0, num_port = 0, first_port = -1;
4475 int i;
4476
4477 /*
4478 * If it is not a communications device or the programming
4479 * interface is greater than 6, give up.
4480 *
4481 * (Should we try to make guesses for multiport serial devices
4482 * later?)
4483 */
4484 if ((dev->class >> 8) != PCI_CLASS_COMMUNICATION_SERIAL ||
4485 (dev->class & 0xff) > 6)
4486 return 1;
4487
4488 for (i=0; i < 6; i++) {
4489 if (IS_PCI_REGION_IOPORT(dev, i)) {
4490 num_port = 0;
4491 if (first_port == -1)
4492 first_port = i;
4493 } else {
4494 num_iomem++;
4495 }
4496 }
4497
4498 /*
4499 * If there is 1 or 0 iomem regions, and exactly one port, use
4500 * it.
4501 */
4502 if (num_iomem <= 1 && num_port == 1) {
4503 board->flags = first_port;
4504 return 0;
4505 }
4506 return 1;
4507 }
4508
4509
4510
4511 /*
4512 * Query PCI space for known serial boards
4513 * If found, add them to the PCI device space in rs_table[]
4514 *
4515 * Accept a maximum of eight boards
4516 *
4517 */
4518 static void __init probe_serial_pci(void)
4519 {
4520 struct pci_dev *dev = NULL;
4521 struct pci_board *board;
4522
4523 #ifdef SERIAL_DEBUG_PCI
4524 printk(KERN_DEBUG "Entered probe_serial_pci()\n");
4525 #endif
4526
4527 pci_for_each_dev(dev) {
4528 for (board = pci_boards; board->vendor; board++) {
4529 if (board->vendor != (unsigned short) PCI_ANY_ID &&
4530 dev->vendor != board->vendor)
4531 continue;
4532 if (board->device != (unsigned short) PCI_ANY_ID &&
4533 dev->device != board->device)
4534 continue;
4535 if (board->subvendor != (unsigned short) PCI_ANY_ID &&
4536 pci_get_subvendor(dev) != board->subvendor)
4537 continue;
4538 if (board->subdevice != (unsigned short) PCI_ANY_ID &&
4539 pci_get_subdevice(dev) != board->subdevice)
4540 continue;
4541 break;
4542 }
4543
4544 if (board->vendor == 0 && serial_pci_guess_board(dev, board))
4545 continue;
4546
4547 start_pci_pnp_board(dev, board);
4548 }
4549
4550 #ifdef SERIAL_DEBUG_PCI
4551 printk(KERN_DEBUG "Leaving probe_serial_pci() (probe finished)\n");
4552 #endif
4553 return;
4554 }
4555
4556 #endif /* ENABLE_SERIAL_PCI */
4557
4558 #ifdef ENABLE_SERIAL_PNP
4559
4560 struct pnp_board {
4561 unsigned short vendor;
4562 unsigned short device;
4563 };
4564
4565 static struct pnp_board pnp_devices[] __initdata = {
4566 /* Archtek America Corp. */
4567 /* Archtek SmartLink Modem 3334BT Plug & Play */
4568 { ISAPNP_VENDOR('A', 'A', 'C'), ISAPNP_DEVICE(0x000F) },
4569 /* Anchor Datacomm BV */
4570 /* SXPro 144 External Data Fax Modem Plug & Play */
4571 { ISAPNP_VENDOR('A', 'D', 'C'), ISAPNP_DEVICE(0x0001) },
4572 /* SXPro 288 External Data Fax Modem Plug & Play */
4573 { ISAPNP_VENDOR('A', 'D', 'C'), ISAPNP_DEVICE(0x0002) },
4574 /* Rockwell 56K ACF II Fax+Data+Voice Modem */
4575 { ISAPNP_VENDOR('A', 'K', 'Y'), ISAPNP_DEVICE(0x1021) },
4576 /* AZT3005 PnP SOUND DEVICE */
4577 { ISAPNP_VENDOR('A', 'Z', 'T'), ISAPNP_DEVICE(0x4001) },
4578 /* Best Data Products Inc. Smart One 336F PnP Modem */
4579 { ISAPNP_VENDOR('B', 'D', 'P'), ISAPNP_DEVICE(0x3336) },
4580 /* Boca Research */
4581 /* Boca Complete Ofc Communicator 14.4 Data-FAX */
4582 { ISAPNP_VENDOR('B', 'R', 'I'), ISAPNP_DEVICE(0x0A49) },
4583 /* Boca Research 33,600 ACF Modem */
4584 { ISAPNP_VENDOR('B', 'R', 'I'), ISAPNP_DEVICE(0x1400) },
4585 /* Boca 33.6 Kbps Internal FD34FSVD */
4586 { ISAPNP_VENDOR('B', 'R', 'I'), ISAPNP_DEVICE(0x3400) },
4587 /* Boca 33.6 Kbps Internal FD34FSVD */
4588 { ISAPNP_VENDOR('B', 'R', 'I'), ISAPNP_DEVICE(0x0A49) },
4589 /* Best Data Products Inc. Smart One 336F PnP Modem */
4590 { ISAPNP_VENDOR('B', 'D', 'P'), ISAPNP_DEVICE(0x3336) },
4591 /* Computer Peripherals Inc */
4592 /* EuroViVa CommCenter-33.6 SP PnP */
4593 { ISAPNP_VENDOR('C', 'P', 'I'), ISAPNP_DEVICE(0x4050) },
4594 /* Creative Labs */
4595 /* Creative Labs Phone Blaster 28.8 DSVD PnP Voice */
4596 { ISAPNP_VENDOR('C', 'T', 'L'), ISAPNP_DEVICE(0x3001) },
4597 /* Creative Labs Modem Blaster 28.8 DSVD PnP Voice */
4598 { ISAPNP_VENDOR('C', 'T', 'L'), ISAPNP_DEVICE(0x3011) },
4599 /* Creative */
4600 /* Creative Modem Blaster Flash56 DI5601-1 */
4601 { ISAPNP_VENDOR('D', 'M', 'B'), ISAPNP_DEVICE(0x1032) },
4602 /* Creative Modem Blaster V.90 DI5660 */
4603 { ISAPNP_VENDOR('D', 'M', 'B'), ISAPNP_DEVICE(0x2001) },
4604 /* FUJITSU */
4605 /* Fujitsu 33600 PnP-I2 R Plug & Play */
4606 { ISAPNP_VENDOR('F', 'U', 'J'), ISAPNP_DEVICE(0x0202) },
4607 /* Fujitsu FMV-FX431 Plug & Play */
4608 { ISAPNP_VENDOR('F', 'U', 'J'), ISAPNP_DEVICE(0x0205) },
4609 /* Fujitsu 33600 PnP-I4 R Plug & Play */
4610 { ISAPNP_VENDOR('F', 'U', 'J'), ISAPNP_DEVICE(0x0206) },
4611 /* Fujitsu Fax Voice 33600 PNP-I5 R Plug & Play */
4612 { ISAPNP_VENDOR('F', 'U', 'J'), ISAPNP_DEVICE(0x0209) },
4613 /* Archtek America Corp. */
4614 /* Archtek SmartLink Modem 3334BT Plug & Play */
4615 { ISAPNP_VENDOR('G', 'V', 'C'), ISAPNP_DEVICE(0x000F) },
4616 /* Hayes */
4617 /* Hayes Optima 288 V.34-V.FC + FAX + Voice Plug & Play */
4618 { ISAPNP_VENDOR('H', 'A', 'Y'), ISAPNP_DEVICE(0x0001) },
4619 /* Hayes Optima 336 V.34 + FAX + Voice PnP */
4620 { ISAPNP_VENDOR('H', 'A', 'Y'), ISAPNP_DEVICE(0x000C) },
4621 /* Hayes Optima 336B V.34 + FAX + Voice PnP */
4622 { ISAPNP_VENDOR('H', 'A', 'Y'), ISAPNP_DEVICE(0x000D) },
4623 /* Hayes Accura 56K Ext Fax Modem PnP */
4624 { ISAPNP_VENDOR('H', 'A', 'Y'), ISAPNP_DEVICE(0x5670) },
4625 /* Hayes Accura 56K Ext Fax Modem PnP */
4626 { ISAPNP_VENDOR('H', 'A', 'Y'), ISAPNP_DEVICE(0x5674) },
4627 /* Hayes Accura 56K Fax Modem PnP */
4628 { ISAPNP_VENDOR('H', 'A', 'Y'), ISAPNP_DEVICE(0x5675) },
4629 /* Hayes 288, V.34 + FAX */
4630 { ISAPNP_VENDOR('H', 'A', 'Y'), ISAPNP_DEVICE(0xF000) },
4631 /* Hayes Optima 288 V.34 + FAX + Voice, Plug & Play */
4632 { ISAPNP_VENDOR('H', 'A', 'Y'), ISAPNP_DEVICE(0xF001) },
4633 /* IBM */
4634 /* IBM Thinkpad 701 Internal Modem Voice */
4635 { ISAPNP_VENDOR('I', 'B', 'M'), ISAPNP_DEVICE(0x0033) },
4636 /* Intertex */
4637 /* Intertex 28k8 33k6 Voice EXT PnP */
4638 { ISAPNP_VENDOR('I', 'X', 'D'), ISAPNP_DEVICE(0xC801) },
4639 /* Intertex 33k6 56k Voice EXT PnP */
4640 { ISAPNP_VENDOR('I', 'X', 'D'), ISAPNP_DEVICE(0xC901) },
4641 /* Intertex 28k8 33k6 Voice SP EXT PnP */
4642 { ISAPNP_VENDOR('I', 'X', 'D'), ISAPNP_DEVICE(0xD801) },
4643 /* Intertex 33k6 56k Voice SP EXT PnP */
4644 { ISAPNP_VENDOR('I', 'X', 'D'), ISAPNP_DEVICE(0xD901) },
4645 /* Intertex 28k8 33k6 Voice SP INT PnP */
4646 { ISAPNP_VENDOR('I', 'X', 'D'), ISAPNP_DEVICE(0xF401) },
4647 /* Intertex 28k8 33k6 Voice SP EXT PnP */
4648 { ISAPNP_VENDOR('I', 'X', 'D'), ISAPNP_DEVICE(0xF801) },
4649 /* Intertex 33k6 56k Voice SP EXT PnP */
4650 { ISAPNP_VENDOR('I', 'X', 'D'), ISAPNP_DEVICE(0xF901) },
4651 /* Kortex International */
4652 /* KORTEX 28800 Externe PnP */
4653 { ISAPNP_VENDOR('K', 'O', 'R'), ISAPNP_DEVICE(0x4522) },
4654 /* KXPro 33.6 Vocal ASVD PnP */
4655 { ISAPNP_VENDOR('K', 'O', 'R'), ISAPNP_DEVICE(0xF661) },
4656 /* Lasat */
4657 /* LASAT Internet 33600 PnP */
4658 { ISAPNP_VENDOR('L', 'A', 'S'), ISAPNP_DEVICE(0x4040) },
4659 /* Lasat Safire 560 PnP */
4660 { ISAPNP_VENDOR('L', 'A', 'S'), ISAPNP_DEVICE(0x4540) },
4661 /* Lasat Safire 336 PnP */
4662 { ISAPNP_VENDOR('L', 'A', 'S'), ISAPNP_DEVICE(0x5440) },
4663 /* Microcom, Inc. */
4664 /* Microcom TravelPorte FAST V.34 Plug & Play */
4665 { ISAPNP_VENDOR('M', 'N', 'P'), ISAPNP_DEVICE(0x281) },
4666 /* Microcom DeskPorte V.34 FAST or FAST+ Plug & Play */
4667 { ISAPNP_VENDOR('M', 'N', 'P'), ISAPNP_DEVICE(0x0336) },
4668 /* Microcom DeskPorte FAST EP 28.8 Plug & Play */
4669 { ISAPNP_VENDOR('M', 'N', 'P'), ISAPNP_DEVICE(0x0339) },
4670 /* Microcom DeskPorte 28.8P Plug & Play */
4671 { ISAPNP_VENDOR('M', 'N', 'P'), ISAPNP_DEVICE(0x0342) },
4672 /* Microcom DeskPorte FAST ES 28.8 Plug & Play */
4673 { ISAPNP_VENDOR('M', 'N', 'P'), ISAPNP_DEVICE(0x0500) },
4674 /* Microcom DeskPorte FAST ES 28.8 Plug & Play */
4675 { ISAPNP_VENDOR('M', 'N', 'P'), ISAPNP_DEVICE(0x0501) },
4676 /* Microcom DeskPorte 28.8S Internal Plug & Play */
4677 { ISAPNP_VENDOR('M', 'N', 'P'), ISAPNP_DEVICE(0x0502) },
4678 /* Motorola */
4679 /* Motorola BitSURFR Plug & Play */
4680 { ISAPNP_VENDOR('M', 'O', 'T'), ISAPNP_DEVICE(0x1105) },
4681 /* Motorola TA210 Plug & Play */
4682 { ISAPNP_VENDOR('M', 'O', 'T'), ISAPNP_DEVICE(0x1111) },
4683 /* Motorola HMTA 200 (ISDN) Plug & Play */
4684 { ISAPNP_VENDOR('M', 'O', 'T'), ISAPNP_DEVICE(0x1114) },
4685 /* Motorola BitSURFR Plug & Play */
4686 { ISAPNP_VENDOR('M', 'O', 'T'), ISAPNP_DEVICE(0x1115) },
4687 /* Motorola Lifestyle 28.8 Internal */
4688 { ISAPNP_VENDOR('M', 'O', 'T'), ISAPNP_DEVICE(0x1190) },
4689 /* Motorola V.3400 Plug & Play */
4690 { ISAPNP_VENDOR('M', 'O', 'T'), ISAPNP_DEVICE(0x1501) },
4691 /* Motorola Lifestyle 28.8 V.34 Plug & Play */
4692 { ISAPNP_VENDOR('M', 'O', 'T'), ISAPNP_DEVICE(0x1502) },
4693 /* Motorola Power 28.8 V.34 Plug & Play */
4694 { ISAPNP_VENDOR('M', 'O', 'T'), ISAPNP_DEVICE(0x1505) },
4695 /* Motorola ModemSURFR External 28.8 Plug & Play */
4696 { ISAPNP_VENDOR('M', 'O', 'T'), ISAPNP_DEVICE(0x1509) },
4697 /* Motorola Premier 33.6 Desktop Plug & Play */
4698 { ISAPNP_VENDOR('M', 'O', 'T'), ISAPNP_DEVICE(0x150A) },
4699 /* Motorola VoiceSURFR 56K External PnP */
4700 { ISAPNP_VENDOR('M', 'O', 'T'), ISAPNP_DEVICE(0x150F) },
4701 /* Motorola ModemSURFR 56K External PnP */
4702 { ISAPNP_VENDOR('M', 'O', 'T'), ISAPNP_DEVICE(0x1510) },
4703 /* Motorola ModemSURFR 56K Internal PnP */
4704 { ISAPNP_VENDOR('M', 'O', 'T'), ISAPNP_DEVICE(0x1550) },
4705 /* Motorola ModemSURFR Internal 28.8 Plug & Play */
4706 { ISAPNP_VENDOR('M', 'O', 'T'), ISAPNP_DEVICE(0x1560) },
4707 /* Motorola Premier 33.6 Internal Plug & Play */
4708 { ISAPNP_VENDOR('M', 'O', 'T'), ISAPNP_DEVICE(0x1580) },
4709 /* Motorola OnlineSURFR 28.8 Internal Plug & Play */
4710 { ISAPNP_VENDOR('M', 'O', 'T'), ISAPNP_DEVICE(0x15B0) },
4711 /* Motorola VoiceSURFR 56K Internal PnP */
4712 { ISAPNP_VENDOR('M', 'O', 'T'), ISAPNP_DEVICE(0x15F0) },
4713 /* Com 1 */
4714 /* Deskline K56 Phone System PnP */
4715 { ISAPNP_VENDOR('M', 'V', 'X'), ISAPNP_DEVICE(0x00A1) },
4716 /* PC Rider K56 Phone System PnP */
4717 { ISAPNP_VENDOR('M', 'V', 'X'), ISAPNP_DEVICE(0x00F2) },
4718 /* Pace 56 Voice Internal Plug & Play Modem */
4719 { ISAPNP_VENDOR('P', 'M', 'C'), ISAPNP_DEVICE(0x2430) },
4720 /* Generic */
4721 /* Generic standard PC COM port */
4722 { ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0x0500) },
4723 /* Generic 16550A-compatible COM port */
4724 { ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0x0501) },
4725 /* Compaq 14400 Modem */
4726 { ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0xC000) },
4727 /* Compaq 2400/9600 Modem */
4728 { ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0xC001) },
4729 /* Dial-Up Networking Serial Cable between 2 PCs */
4730 { ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0xC031) },
4731 /* Dial-Up Networking Parallel Cable between 2 PCs */
4732 { ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0xC032) },
4733 /* Standard 9600 bps Modem */
4734 { ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0xC100) },
4735 /* Standard 14400 bps Modem */
4736 { ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0xC101) },
4737 /* Standard 28800 bps Modem*/
4738 { ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0xC102) },
4739 /* Standard Modem*/
4740 { ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0xC103) },
4741 /* Standard 9600 bps Modem*/
4742 { ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0xC104) },
4743 /* Standard 14400 bps Modem*/
4744 { ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0xC105) },
4745 /* Standard 28800 bps Modem*/
4746 { ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0xC106) },
4747 /* Standard Modem */
4748 { ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0xC107) },
4749 /* Standard 9600 bps Modem */
4750 { ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0xC108) },
4751 /* Standard 14400 bps Modem */
4752 { ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0xC109) },
4753 /* Standard 28800 bps Modem */
4754 { ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0xC10A) },
4755 /* Standard Modem */
4756 { ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0xC10B) },
4757 /* Standard 9600 bps Modem */
4758 { ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0xC10C) },
4759 /* Standard 14400 bps Modem */
4760 { ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0xC10D) },
4761 /* Standard 28800 bps Modem */
4762 { ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0xC10E) },
4763 /* Standard Modem */
4764 { ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0xC10F) },
4765 /* Standard PCMCIA Card Modem */
4766 { ISAPNP_VENDOR('P', 'N', 'P'), ISAPNP_DEVICE(0x2000) },
4767 /* Rockwell */
4768 /* Modular Technology */
4769 /* Rockwell 33.6 DPF Internal PnP */
4770 /* Modular Technology 33.6 Internal PnP */
4771 { ISAPNP_VENDOR('R', 'O', 'K'), ISAPNP_DEVICE(0x0030) },
4772 /* Kortex International */
4773 /* KORTEX 14400 Externe PnP */
4774 { ISAPNP_VENDOR('R', 'O', 'K'), ISAPNP_DEVICE(0x0100) },
4775 /* Viking Components, Inc */
4776 /* Viking 28.8 INTERNAL Fax+Data+Voice PnP */
4777 { ISAPNP_VENDOR('R', 'O', 'K'), ISAPNP_DEVICE(0x4920) },
4778 /* Rockwell */
4779 /* British Telecom */
4780 /* Modular Technology */
4781 /* Rockwell 33.6 DPF External PnP */
4782 /* BT Prologue 33.6 External PnP */
4783 /* Modular Technology 33.6 External PnP */
4784 { ISAPNP_VENDOR('R', 'S', 'S'), ISAPNP_DEVICE(0x00A0) },
4785 /* Viking 56K FAX INT */
4786 { ISAPNP_VENDOR('R', 'S', 'S'), ISAPNP_DEVICE(0x0262) },
4787 /* SupraExpress 28.8 Data/Fax PnP modem */
4788 { ISAPNP_VENDOR('S', 'U', 'P'), ISAPNP_DEVICE(0x1310) },
4789 /* SupraExpress 33.6 Data/Fax PnP modem */
4790 { ISAPNP_VENDOR('S', 'U', 'P'), ISAPNP_DEVICE(0x1421) },
4791 /* SupraExpress 33.6 Data/Fax PnP modem */
4792 { ISAPNP_VENDOR('S', 'U', 'P'), ISAPNP_DEVICE(0x1590) },
4793 /* SupraExpress 33.6 Data/Fax PnP modem */
4794 { ISAPNP_VENDOR('S', 'U', 'P'), ISAPNP_DEVICE(0x1760) },
4795 /* Phoebe Micro */
4796 /* Phoebe Micro 33.6 Data Fax 1433VQH Plug & Play */
4797 { ISAPNP_VENDOR('T', 'E', 'X'), ISAPNP_DEVICE(0x0011) },
4798 /* Archtek America Corp. */
4799 /* Archtek SmartLink Modem 3334BT Plug & Play */
4800 { ISAPNP_VENDOR('U', 'A', 'C'), ISAPNP_DEVICE(0x000F) },
4801 /* 3Com Corp. */
4802 /* Gateway Telepath IIvi 33.6 */
4803 { ISAPNP_VENDOR('U', 'S', 'R'), ISAPNP_DEVICE(0x0000) },
4804 /* Sportster Vi 14.4 PnP FAX Voicemail */
4805 { ISAPNP_VENDOR('U', 'S', 'R'), ISAPNP_DEVICE(0x0004) },
4806 /* U.S. Robotics 33.6K Voice INT PnP */
4807 { ISAPNP_VENDOR('U', 'S', 'R'), ISAPNP_DEVICE(0x0006) },
4808 /* U.S. Robotics 33.6K Voice EXT PnP */
4809 { ISAPNP_VENDOR('U', 'S', 'R'), ISAPNP_DEVICE(0x0007) },
4810 /* U.S. Robotics 33.6K Voice INT PnP */
4811 { ISAPNP_VENDOR('U', 'S', 'R'), ISAPNP_DEVICE(0x2002) },
4812 /* U.S. Robotics 56K Voice INT PnP */
4813 { ISAPNP_VENDOR('U', 'S', 'R'), ISAPNP_DEVICE(0x2070) },
4814 /* U.S. Robotics 56K Voice EXT PnP */
4815 { ISAPNP_VENDOR('U', 'S', 'R'), ISAPNP_DEVICE(0x2080) },
4816 /* U.S. Robotics 56K FAX INT */
4817 { ISAPNP_VENDOR('U', 'S', 'R'), ISAPNP_DEVICE(0x3031) },
4818 /* U.S. Robotics 56K Voice INT PnP */
4819 { ISAPNP_VENDOR('U', 'S', 'R'), ISAPNP_DEVICE(0x3070) },
4820 /* U.S. Robotics 56K Voice EXT PnP */
4821 { ISAPNP_VENDOR('U', 'S', 'R'), ISAPNP_DEVICE(0x3080) },
4822 /* U.S. Robotics 56K Voice INT PnP */
4823 { ISAPNP_VENDOR('U', 'S', 'R'), ISAPNP_DEVICE(0x3090) },
4824 /* U.S. Robotics 56K Message */
4825 { ISAPNP_VENDOR('U', 'S', 'R'), ISAPNP_DEVICE(0x9100) },
4826 /* U.S. Robotics 56K FAX EXT PnP*/
4827 { ISAPNP_VENDOR('U', 'S', 'R'), ISAPNP_DEVICE(0x9160) },
4828 /* U.S. Robotics 56K FAX INT PnP*/
4829 { ISAPNP_VENDOR('U', 'S', 'R'), ISAPNP_DEVICE(0x9170) },
4830 /* U.S. Robotics 56K Voice EXT PnP*/
4831 { ISAPNP_VENDOR('U', 'S', 'R'), ISAPNP_DEVICE(0x9180) },
4832 /* U.S. Robotics 56K Voice INT PnP*/
4833 { ISAPNP_VENDOR('U', 'S', 'R'), ISAPNP_DEVICE(0x9190) },
4834 { 0, }
4835 };
4836
4837 static void inline avoid_irq_share(struct pci_dev *dev)
4838 {
4839 int i, map = 0x1FF8;
4840 struct serial_state *state = rs_table;
4841 struct isapnp_irq *irq;
4842 struct isapnp_resources *res = dev->sysdata;
4843
4844 for (i = 0; i < NR_PORTS; i++) {
4845 if (state->type != PORT_UNKNOWN)
4846 clear_bit(state->irq, &map);
4847 state++;
4848 }
4849
4850 for ( ; res; res = res->alt)
4851 for(irq = res->irq; irq; irq = irq->next)
4852 irq->map = map;
4853 }
4854
4855 static char *modem_names[] __initdata = {
4856 "MODEM", "Modem", "modem", "FAX", "Fax", "fax",
4857 "56K", "56k", "K56", "33.6", "28.8", "14.4",
4858 "33,600", "28,800", "14,400", "33.600", "28.800", "14.400",
4859 "33600", "28800", "14400", "V.90", "V.34", "V.32", 0
4860 };
4861
4862 static int __init check_name(char *name)
4863 {
4864 char **tmp = modem_names;
4865
4866 while (*tmp) {
4867 if (strstr(name, *tmp))
4868 return 1;
4869 tmp++;
4870 }
4871 return 0;
4872 }
4873
4874 static int inline check_compatible_id(struct pci_dev *dev)
4875 {
4876 int i;
4877 for (i = 0; i < DEVICE_COUNT_COMPATIBLE; i++)
4878 if ((dev->vendor_compatible[i] ==
4879 ISAPNP_VENDOR('P', 'N', 'P')) &&
4880 (swab16(dev->device_compatible[i]) >= 0xc000) &&
4881 (swab16(dev->device_compatible[i]) <= 0xdfff))
4882 return 0;
4883 return 1;
4884 }
4885
4886 /*
4887 * Given a complete unknown ISA PnP device, try to use some heuristics to
4888 * detect modems. Currently use such heuristic set:
4889 * - dev->name or dev->bus->name must contain "modem" substring;
4890 * - device must have only one IO region (8 byte long) with base adress
4891 * 0x2e8, 0x3e8, 0x2f8 or 0x3f8.
4892 *
4893 * Such detection looks very ugly, but can detect at least some of numerous
4894 * ISA PnP modems, alternatively we must hardcode all modems in pnp_devices[]
4895 * table.
4896 */
4897 static int _INLINE_ serial_pnp_guess_board(struct pci_dev *dev,
4898 struct pci_board *board)
4899 {
4900 struct isapnp_resources *res = (struct isapnp_resources *)dev->sysdata;
4901 struct isapnp_resources *resa;
4902
4903 if (!(check_name(dev->name) || check_name(dev->bus->name)) &&
4904 !(check_compatible_id(dev)))
4905 return 1;
4906
4907 if (!res || res->next)
4908 return 1;
4909
4910 for (resa = res->alt; resa; resa = resa->alt) {
4911 struct isapnp_port *port;
4912 for (port = res->port; port; port = port->next)
4913 if ((port->size == 8) &&
4914 ((port->min == 0x2f8) ||
4915 (port->min == 0x3f8) ||
4916 (port->min == 0x2e8) ||
4917 (port->min == 0x3e8)))
4918 return 0;
4919 }
4920
4921 return 1;
4922 }
4923
4924 static void __init probe_serial_pnp(void)
4925 {
4926 struct pci_dev *dev = NULL;
4927 struct pnp_board *pnp_board;
4928 struct pci_board board;
4929
4930 #ifdef SERIAL_DEBUG_PNP
4931 printk("Entered probe_serial_pnp()\n");
4932 #endif
4933 if (!isapnp_present()) {
4934 #ifdef SERIAL_DEBUG_PNP
4935 printk("Leaving probe_serial_pnp() (no isapnp)\n");
4936 #endif
4937 return;
4938 }
4939
4940 isapnp_for_each_dev(dev) {
4941 if (dev->active)
4942 continue;
4943
4944 memset(&board, 0, sizeof(board));
4945 board.flags = SPCI_FL_BASE0 | SPCI_FL_PNPDEFAULT;
4946 board.num_ports = 1;
4947 board.base_baud = 115200;
4948
4949 for (pnp_board = pnp_devices; pnp_board->vendor; pnp_board++)
4950 if ((dev->vendor == pnp_board->vendor) &&
4951 (dev->device == pnp_board->device))
4952 break;
4953
4954 if (pnp_board->vendor) {
4955 board.vendor = pnp_board->vendor;
4956 board.device = pnp_board->device;
4957 /* Special case that's more efficient to hardcode */
4958 if ((board.vendor == ISAPNP_VENDOR('A', 'K', 'Y') &&
4959 board.device == ISAPNP_DEVICE(0x1021)))
4960 board.flags |= SPCI_FL_NO_SHIRQ;
4961 } else {
4962 if (serial_pnp_guess_board(dev, &board))
4963 continue;
4964 }
4965
4966 if (board.flags & SPCI_FL_NO_SHIRQ)
4967 avoid_irq_share(dev);
4968 start_pci_pnp_board(dev, &board);
4969 }
4970
4971 #ifdef SERIAL_DEBUG_PNP
4972 printk("Leaving probe_serial_pnp() (probe finished)\n");
4973 #endif
4974 return;
4975 }
4976
4977 #endif /* ENABLE_SERIAL_PNP */
4978
4979 /*
4980 * The serial driver boot-time initialization code!
4981 */
4982 int __init rs_init(void)
4983 {
4984 int i;
4985 struct serial_state * state;
4986
4987 if (timer_table[RS_TIMER].fn) {
4988 printk("RS_TIMER already set, another serial driver "
4989 "already loaded?\n");
4990 #ifdef MODULE
4991 printk("Can't load serial driver module over built-in "
4992 "serial driver\n");
4993 #endif
4994 return -EBUSY;
4995 }
4996
4997 init_bh(SERIAL_BH, do_serial_bh);
4998 timer_table[RS_TIMER].fn = rs_timer;
4999 timer_table[RS_TIMER].expires = 0;
5000
5001 for (i = 0; i < NR_IRQS; i++) {
5002 IRQ_ports[i] = 0;
5003 IRQ_timeout[i] = 0;
5004 #ifdef CONFIG_SERIAL_MULTIPORT
5005 memset(&rs_multiport[i], 0,
5006 sizeof(struct rs_multiport_struct));
5007 #endif
5008 }
5009 #ifdef CONFIG_SERIAL_CONSOLE
5010 /*
5011 * The interrupt of the serial console port
5012 * can't be shared.
5013 */
5014 if (sercons.flags & CON_CONSDEV) {
5015 for(i = 0; i < NR_PORTS; i++)
5016 if (i != sercons.index &&
5017 rs_table[i].irq == rs_table[sercons.index].irq)
5018 rs_table[i].irq = 0;
5019 }
5020 #endif
5021 show_serial_version();
5022
5023 /* Initialize the tty_driver structure */
5024
5025 memset(&serial_driver, 0, sizeof(struct tty_driver));
5026 serial_driver.magic = TTY_DRIVER_MAGIC;
5027 #if (LINUX_VERSION_CODE > 0x20100)
5028 serial_driver.driver_name = "serial";
5029 #endif
5030 #if (LINUX_VERSION_CODE > 0x2032D && defined(CONFIG_DEVFS_FS))
5031 serial_driver.name = "tts/%d";
5032 #else
5033 serial_driver.name = "ttyS";
5034 #endif
5035 serial_driver.major = TTY_MAJOR;
5036 serial_driver.minor_start = 64 + SERIAL_DEV_OFFSET;
5037 serial_driver.num = NR_PORTS;
5038 serial_driver.type = TTY_DRIVER_TYPE_SERIAL;
5039 serial_driver.subtype = SERIAL_TYPE_NORMAL;
5040 serial_driver.init_termios = tty_std_termios;
5041 serial_driver.init_termios.c_cflag =
5042 B9600 | CS8 | CREAD | HUPCL | CLOCAL;
5043 serial_driver.flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_NO_DEVFS;
5044 serial_driver.refcount = &serial_refcount;
5045 serial_driver.table = serial_table;
5046 serial_driver.termios = serial_termios;
5047 serial_driver.termios_locked = serial_termios_locked;
5048
5049 serial_driver.open = rs_open;
5050 serial_driver.close = rs_close;
5051 serial_driver.write = rs_write;
5052 serial_driver.put_char = rs_put_char;
5053 serial_driver.flush_chars = rs_flush_chars;
5054 serial_driver.write_room = rs_write_room;
5055 serial_driver.chars_in_buffer = rs_chars_in_buffer;
5056 serial_driver.flush_buffer = rs_flush_buffer;
5057 serial_driver.ioctl = rs_ioctl;
5058 serial_driver.throttle = rs_throttle;
5059 serial_driver.unthrottle = rs_unthrottle;
5060 serial_driver.set_termios = rs_set_termios;
5061 serial_driver.stop = rs_stop;
5062 serial_driver.start = rs_start;
5063 serial_driver.hangup = rs_hangup;
5064 #if (LINUX_VERSION_CODE >= 131394) /* Linux 2.1.66 */
5065 serial_driver.break_ctl = rs_break;
5066 #endif
5067 #if (LINUX_VERSION_CODE >= 131343)
5068 serial_driver.send_xchar = rs_send_xchar;
5069 serial_driver.wait_until_sent = rs_wait_until_sent;
5070 serial_driver.read_proc = rs_read_proc;
5071 #endif
5072
5073 /*
5074 * The callout device is just like normal device except for
5075 * major number and the subtype code.
5076 */
5077 callout_driver = serial_driver;
5078 #if (LINUX_VERSION_CODE > 0x2032D && defined(CONFIG_DEVFS_FS))
5079 callout_driver.name = "cua/%d";
5080 #else
5081 callout_driver.name = "cua";
5082 #endif
5083 callout_driver.major = TTYAUX_MAJOR;
5084 callout_driver.subtype = SERIAL_TYPE_CALLOUT;
5085 #if (LINUX_VERSION_CODE >= 131343)
5086 callout_driver.read_proc = 0;
5087 callout_driver.proc_entry = 0;
5088 #endif
5089
5090 if (tty_register_driver(&serial_driver))
5091 panic("Couldn't register serial driver\n");
5092 if (tty_register_driver(&callout_driver))
5093 panic("Couldn't register callout driver\n");
5094
5095 for (i = 0, state = rs_table; i < NR_PORTS; i++,state++) {
5096 state->magic = SSTATE_MAGIC;
5097 state->line = i;
5098 state->type = PORT_UNKNOWN;
5099 state->custom_divisor = 0;
5100 state->close_delay = 5*HZ/10;
5101 state->closing_wait = 30*HZ;
5102 state->callout_termios = callout_driver.init_termios;
5103 state->normal_termios = serial_driver.init_termios;
5104 state->icount.cts = state->icount.dsr =
5105 state->icount.rng = state->icount.dcd = 0;
5106 state->icount.rx = state->icount.tx = 0;
5107 state->icount.frame = state->icount.parity = 0;
5108 state->icount.overrun = state->icount.brk = 0;
5109 state->irq = irq_cannonicalize(state->irq);
5110 if (state->hub6)
5111 state->io_type = SERIAL_IO_HUB6;
5112 if (state->port && check_region(state->port,8))
5113 continue;
5114 if (state->flags & ASYNC_BOOT_AUTOCONF)
5115 autoconfig(state);
5116 }
5117 for (i = 0, state = rs_table; i < NR_PORTS; i++,state++) {
5118 if (state->type == PORT_UNKNOWN)
5119 continue;
5120 if ( (state->flags & ASYNC_BOOT_AUTOCONF)
5121 && (state->flags & ASYNC_AUTO_IRQ)
5122 && (state->port != 0))
5123 state->irq = detect_uart_irq(state);
5124 printk(KERN_INFO "ttyS%02d%s at 0x%04lx (irq = %d) is a %s\n",
5125 state->line + SERIAL_DEV_OFFSET,
5126 (state->flags & ASYNC_FOURPORT) ? " FourPort" : "",
5127 state->port, state->irq,
5128 uart_config[state->type].name);
5129 tty_register_devfs(&serial_driver, 0,
5130 serial_driver.minor_start + state->line);
5131 tty_register_devfs(&callout_driver, 0,
5132 callout_driver.minor_start + state->line);
5133 }
5134 #ifdef ENABLE_SERIAL_PCI
5135 probe_serial_pci();
5136 #endif
5137 #ifdef ENABLE_SERIAL_PNP
5138 probe_serial_pnp();
5139 #endif
5140 return 0;
5141 }
5142
5143 /*
5144 * register_serial and unregister_serial allows for 16x50 serial ports to be
5145 * configured at run-time, to support PCMCIA modems.
5146 */
5147
5148 /**
5149 * register_serial - configure a 16x50 serial port at runtime
5150 * @req: request structure
5151 *
5152 * Configure the serial port specified by the request. If the
5153 * port exists and is in use an error is returned. If the port
5154 * is not currently in the table it is added.
5155 *
5156 * The port is then probed and if neccessary the IRQ is autodetected
5157 * If this fails an error is returned.
5158 *
5159 * On success the port is ready to use and the line number is returned.
5160 */
5161
5162 int register_serial(struct serial_struct *req)
5163 {
5164 int i;
5165 unsigned long flags;
5166 struct serial_state *state;
5167 struct async_struct *info;
5168 unsigned long port;
5169
5170 port = req->port;
5171 if (HIGH_BITS_OFFSET)
5172 port += req->port_high << HIGH_BITS_OFFSET;
5173
5174 save_flags(flags); cli();
5175 for (i = 0; i < NR_PORTS; i++) {
5176 if ((rs_table[i].port == port) &&
5177 (rs_table[i].iomem_base == req->iomem_base))
5178 break;
5179 }
5180 if (i == NR_PORTS) {
5181 for (i = 4; i < NR_PORTS; i++)
5182 if ((rs_table[i].type == PORT_UNKNOWN) &&
5183 (rs_table[i].count == 0))
5184 break;
5185 }
5186 if (i == NR_PORTS) {
5187 for (i = 0; i < NR_PORTS; i++)
5188 if ((rs_table[i].type == PORT_UNKNOWN) &&
5189 (rs_table[i].count == 0))
5190 break;
5191 }
5192 if (i == NR_PORTS) {
5193 restore_flags(flags);
5194 return -1;
5195 }
5196 state = &rs_table[i];
5197 if (rs_table[i].count) {
5198 restore_flags(flags);
5199 printk("Couldn't configure serial #%d (port=%ld,irq=%d): "
5200 "device already open\n", i, port, req->irq);
5201 return -1;
5202 }
5203 state->irq = req->irq;
5204 state->port = port;
5205 state->flags = req->flags;
5206 state->io_type = req->io_type;
5207 state->iomem_base = req->iomem_base;
5208 state->iomem_reg_shift = req->iomem_reg_shift;
5209 if (req->baud_base)
5210 state->baud_base = req->baud_base;
5211 if ((info = state->info) != NULL) {
5212 info->port = port;
5213 info->flags = req->flags;
5214 info->io_type = req->io_type;
5215 info->iomem_base = req->iomem_base;
5216 info->iomem_reg_shift = req->iomem_reg_shift;
5217 }
5218 autoconfig(state);
5219 if (state->type == PORT_UNKNOWN) {
5220 restore_flags(flags);
5221 printk("register_serial(): autoconfig failed\n");
5222 return -1;
5223 }
5224 restore_flags(flags);
5225
5226 if ((state->flags & ASYNC_AUTO_IRQ) && CONFIGURED_SERIAL_PORT(state))
5227 state->irq = detect_uart_irq(state);
5228
5229 printk(KERN_INFO "ttyS%02d at %s 0x%04lx (irq = %d) is a %s\n",
5230 state->line + SERIAL_DEV_OFFSET,
5231 state->iomem_base ? "iomem" : "port",
5232 state->iomem_base ? (unsigned long)state->iomem_base :
5233 state->port, state->irq, uart_config[state->type].name);
5234 tty_register_devfs(&serial_driver, 0,
5235 serial_driver.minor_start + state->line);
5236 tty_register_devfs(&callout_driver, 0,
5237 callout_driver.minor_start + state->line);
5238 return state->line + SERIAL_DEV_OFFSET;
5239 }
5240
5241 /**
5242 * unregister_serial - deconfigure a 16x50 serial port
5243 * @line: line to deconfigure
5244 *
5245 * The port specified is deconfigured and its resources are freed. Any
5246 * user of the port is disconnected as if carrier was dropped. Line is
5247 * the port number returned by register_serial().
5248 */
5249
5250 void unregister_serial(int line)
5251 {
5252 unsigned long flags;
5253 struct serial_state *state = &rs_table[line];
5254
5255 save_flags(flags); cli();
5256 if (state->info && state->info->tty)
5257 tty_hangup(state->info->tty);
5258 state->type = PORT_UNKNOWN;
5259 printk(KERN_INFO "tty%02d unloaded\n", state->line);
5260 /* These will be hidden, because they are devices that will no longer
5261 * be available to the system. (ie, PCMCIA modems, once ejected)
5262 */
5263 tty_unregister_devfs(&serial_driver,
5264 serial_driver.minor_start + state->line);
5265 tty_unregister_devfs(&callout_driver,
5266 callout_driver.minor_start + state->line);
5267 restore_flags(flags);
5268 }
5269
5270 #ifdef MODULE
5271 void rs_fini(void)
5272 {
5273 unsigned long flags;
5274 int e1, e2;
5275 int i;
5276 struct async_struct *info;
5277
5278 /* printk("Unloading %s: version %s\n", serial_name, serial_version); */
5279 save_flags(flags); cli();
5280 timer_active &= ~(1 << RS_TIMER);
5281 timer_table[RS_TIMER].fn = NULL;
5282 timer_table[RS_TIMER].expires = 0;
5283 remove_bh(SERIAL_BH);
5284 if ((e1 = tty_unregister_driver(&serial_driver)))
5285 printk("serial: failed to unregister serial driver (%d)\n",
5286 e1);
5287 if ((e2 = tty_unregister_driver(&callout_driver)))
5288 printk("serial: failed to unregister callout driver (%d)\n",
5289 e2);
5290 restore_flags(flags);
5291
5292 for (i = 0; i < NR_PORTS; i++) {
5293 if ((info = rs_table[i].info)) {
5294 rs_table[i].info = NULL;
5295 kfree_s(info, sizeof(struct async_struct));
5296 }
5297 if ((rs_table[i].type != PORT_UNKNOWN) && rs_table[i].port) {
5298 #ifdef CONFIG_SERIAL_RSA
5299 if (rs_table[i].type == PORT_RSA)
5300 release_region(rs_table[i].port +
5301 UART_RSA_BASE, 16);
5302 else
5303 #endif
5304 release_region(rs_table[i].port, 8);
5305 }
5306 #if defined(ENABLE_SERIAL_PCI) || defined(ENABLE_SERIAL_PNP)
5307 if (rs_table[i].iomem_base)
5308 iounmap(rs_table[i].iomem_base);
5309 #endif
5310 }
5311 #if defined(ENABLE_SERIAL_PCI) || defined(ENABLE_SERIAL_PNP)
5312 for (i=0; i < serial_pci_board_idx; i++) {
5313 struct pci_board_inst *brd = &serial_pci_board[i];
5314
5315 if (brd->board.init_fn)
5316 (brd->board.init_fn)(brd->dev, &brd->board, 0);
5317
5318 if (DEACTIVATE_FUNC(brd->dev))
5319 (DEACTIVATE_FUNC(brd->dev))(brd->dev);
5320 }
5321 #endif
5322 if (tmp_buf) {
5323 unsigned long pg = (unsigned long) tmp_buf;
5324 tmp_buf = NULL;
5325 free_page(pg);
5326 }
5327 }
5328 #endif /* MODULE */
5329
5330 module_init(rs_init);
5331 module_exit(rs_fini);
5332
5333
5334 /*
5335 * ------------------------------------------------------------
5336 * Serial console driver
5337 * ------------------------------------------------------------
5338 */
5339 #ifdef CONFIG_SERIAL_CONSOLE
5340
5341 #define BOTH_EMPTY (UART_LSR_TEMT | UART_LSR_THRE)
5342
5343 static struct async_struct async_sercons;
5344
5345 /*
5346 * Wait for transmitter & holding register to empty
5347 */
5348 static inline void wait_for_xmitr(struct async_struct *info)
5349 {
5350 unsigned int tmout = 1000000;
5351
5352 while (--tmout &&
5353 ((serial_in(info, UART_LSR) & BOTH_EMPTY) != BOTH_EMPTY));
5354 }
5355
5356
5357 /*
5358 * Print a string to the serial port trying not to disturb
5359 * any possible real use of the port...
5360 *
5361 * The console_lock must be held when we get here.
5362 */
5363 static void serial_console_write(struct console *co, const char *s,
5364 unsigned count)
5365 {
5366 static struct async_struct *info = &async_sercons;
5367 int ier;
5368 unsigned i;
5369
5370 /*
5371 * First save the IER then disable the interrupts
5372 */
5373 ier = serial_in(info, UART_IER);
5374 serial_out(info, UART_IER, 0x00);
5375
5376 /*
5377 * Now, do each character
5378 */
5379 for (i = 0; i < count; i++, s++) {
5380 wait_for_xmitr(info);
5381
5382 /*
5383 * Send the character out.
5384 * If a LF, also do CR...
5385 */
5386 serial_out(info, UART_TX, *s);
5387 if (*s == 10) {
5388 wait_for_xmitr(info);
5389 serial_out(info, UART_TX, 13);
5390 }
5391 }
5392
5393 /*
5394 * Finally, Wait for transmitter & holding register to empty
5395 * and restore the IER
5396 */
5397 wait_for_xmitr(info);
5398 serial_out(info, UART_IER, ier);
5399 }
5400
5401 /*
5402 * Receive character from the serial port
5403 */
5404 static int serial_console_wait_key(struct console *co)
5405 {
5406 static struct async_struct *info;
5407 int ier, c;
5408
5409 info = &async_sercons;
5410
5411 /*
5412 * First save the IER then disable the interrupts so
5413 * that the real driver for the port does not get the
5414 * character.
5415 */
5416 ier = serial_in(info, UART_IER);
5417 serial_out(info, UART_IER, 0x00);
5418
5419 while ((serial_in(info, UART_LSR) & UART_LSR_DR) == 0);
5420 c = serial_in(info, UART_RX);
5421
5422 /*
5423 * Restore the interrupts
5424 */
5425 serial_out(info, UART_IER, ier);
5426
5427 return c;
5428 }
5429
5430 static kdev_t serial_console_device(struct console *c)
5431 {
5432 return MKDEV(TTY_MAJOR, 64 + c->index);
5433 }
5434
5435 /*
5436 * Setup initial baud/bits/parity. We do two things here:
5437 * - construct a cflag setting for the first rs_open()
5438 * - initialize the serial port
5439 * Return non-zero if we didn't find a serial port.
5440 */
5441 static int __init serial_console_setup(struct console *co, char *options)
5442 {
5443 static struct async_struct *info;
5444 struct serial_state *state;
5445 unsigned cval;
5446 int baud = 9600;
5447 int bits = 8;
5448 int parity = 'n';
5449 int cflag = CREAD | HUPCL | CLOCAL;
5450 int quot = 0;
5451 char *s;
5452
5453 if (options) {
5454 baud = simple_strtoul(options, NULL, 10);
5455 s = options;
5456 while(*s >= '0' && *s <= '9')
5457 s++;
5458 if (*s) parity = *s++;
5459 if (*s) bits = *s - '0';
5460 }
5461
5462 /*
5463 * Now construct a cflag setting.
5464 */
5465 switch(baud) {
5466 case 1200:
5467 cflag |= B1200;
5468 break;
5469 case 2400:
5470 cflag |= B2400;
5471 break;
5472 case 4800:
5473 cflag |= B4800;
5474 break;
5475 case 19200:
5476 cflag |= B19200;
5477 break;
5478 case 38400:
5479 cflag |= B38400;
5480 break;
5481 case 57600:
5482 cflag |= B57600;
5483 break;
5484 case 115200:
5485 cflag |= B115200;
5486 break;
5487 case 9600:
5488 default:
5489 cflag |= B9600;
5490 break;
5491 }
5492 switch(bits) {
5493 case 7:
5494 cflag |= CS7;
5495 break;
5496 default:
5497 case 8:
5498 cflag |= CS8;
5499 break;
5500 }
5501 switch(parity) {
5502 case 'o': case 'O':
5503 cflag |= PARODD;
5504 break;
5505 case 'e': case 'E':
5506 cflag |= PARENB;
5507 break;
5508 }
5509 co->cflag = cflag;
5510
5511 /*
5512 * Divisor, bytesize and parity
5513 */
5514 state = rs_table + co->index;
5515 info = &async_sercons;
5516 info->magic = SERIAL_MAGIC;
5517 info->state = state;
5518 info->port = state->port;
5519 info->flags = state->flags;
5520 #ifdef CONFIG_HUB6
5521 info->hub6 = state->hub6;
5522 #endif
5523 info->io_type = state->io_type;
5524 info->iomem_base = state->iomem_base;
5525 info->iomem_reg_shift = state->iomem_reg_shift;
5526 quot = state->baud_base / baud;
5527 cval = cflag & (CSIZE | CSTOPB);
5528 #if defined(__powerpc__) || defined(__alpha__)
5529 cval >>= 8;
5530 #else /* !__powerpc__ && !__alpha__ */
5531 cval >>= 4;
5532 #endif /* !__powerpc__ && !__alpha__ */
5533 if (cflag & PARENB)
5534 cval |= UART_LCR_PARITY;
5535 if (!(cflag & PARODD))
5536 cval |= UART_LCR_EPAR;
5537
5538 /*
5539 * Disable UART interrupts, set DTR and RTS high
5540 * and set speed.
5541 */
5542 serial_out(info, UART_LCR, cval | UART_LCR_DLAB); /* set DLAB */
5543 serial_out(info, UART_DLL, quot & 0xff); /* LS of divisor */
5544 serial_out(info, UART_DLM, quot >> 8); /* MS of divisor */
5545 serial_out(info, UART_LCR, cval); /* reset DLAB */
5546 serial_out(info, UART_IER, 0);
5547 serial_out(info, UART_MCR, UART_MCR_DTR | UART_MCR_RTS);
5548
5549 /*
5550 * If we read 0xff from the LSR, there is no UART here.
5551 */
5552 if (serial_in(info, UART_LSR) == 0xff)
5553 return -1;
5554
5555 return 0;
5556 }
5557
5558 static struct console sercons = {
5559 "ttyS",
5560 serial_console_write,
5561 NULL,
5562 serial_console_device,
5563 serial_console_wait_key,
5564 NULL,
5565 serial_console_setup,
5566 CON_PRINTBUFFER,
5567 -1,
5568 0,
5569 NULL
5570 };
5571
5572 /*
5573 * Register console.
5574 */
5575 void __init serial_console_init(void)
5576 {
5577 register_console(&sercons);
5578 }
5579 #endif
5580
5581 /*
5582 Local variables:
5583 compile-command: "gcc -D__KERNEL__ -I../../include -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -fno-strict-aliasing -pipe -fno-strength-reduce -march=i586 -DMODULE -DMODVERSIONS -include ../../include/linux/modversions.h -DEXPORT_SYMTAB -c serial.c"
5584 End:
5585 */
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