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1da177e4 LT |
1 | /* |
2 | * linux/drivers/char/riscom.c -- RISCom/8 multiport serial driver. | |
3 | * | |
4 | * Copyright (C) 1994-1996 Dmitry Gorodchanin (pgmdsg@ibi.com) | |
5 | * | |
6 | * This code is loosely based on the Linux serial driver, written by | |
7 | * Linus Torvalds, Theodore T'so and others. The RISCom/8 card | |
8 | * programming info was obtained from various drivers for other OSes | |
9 | * (FreeBSD, ISC, etc), but no source code from those drivers were | |
10 | * directly included in this driver. | |
11 | * | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
26 | * | |
27 | * Revision 1.1 | |
28 | * | |
29 | * ChangeLog: | |
30 | * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 27-Jun-2001 | |
31 | * - get rid of check_region and several cleanups | |
32 | */ | |
33 | ||
34 | #include <linux/module.h> | |
35 | ||
36 | #include <asm/io.h> | |
37 | #include <linux/kernel.h> | |
38 | #include <linux/sched.h> | |
39 | #include <linux/ioport.h> | |
40 | #include <linux/interrupt.h> | |
41 | #include <linux/errno.h> | |
42 | #include <linux/tty.h> | |
43 | #include <linux/mm.h> | |
44 | #include <linux/serial.h> | |
45 | #include <linux/fcntl.h> | |
46 | #include <linux/major.h> | |
47 | #include <linux/init.h> | |
48 | #include <linux/delay.h> | |
33f0f88f | 49 | #include <linux/tty_flip.h> |
1da177e4 LT |
50 | |
51 | #include <asm/uaccess.h> | |
52 | ||
53 | #include "riscom8.h" | |
54 | #include "riscom8_reg.h" | |
55 | ||
56 | /* Am I paranoid or not ? ;-) */ | |
57 | #define RISCOM_PARANOIA_CHECK | |
58 | ||
59 | /* | |
60 | * Crazy InteliCom/8 boards sometimes has swapped CTS & DSR signals. | |
61 | * You can slightly speed up things by #undefing the following option, | |
62 | * if you are REALLY sure that your board is correct one. | |
63 | */ | |
64 | ||
65 | #define RISCOM_BRAIN_DAMAGED_CTS | |
66 | ||
67 | /* | |
68 | * The following defines are mostly for testing purposes. But if you need | |
69 | * some nice reporting in your syslog, you can define them also. | |
70 | */ | |
71 | #undef RC_REPORT_FIFO | |
72 | #undef RC_REPORT_OVERRUN | |
73 | ||
74 | ||
75 | #define RISCOM_LEGAL_FLAGS \ | |
76 | (ASYNC_HUP_NOTIFY | ASYNC_SAK | ASYNC_SPLIT_TERMIOS | \ | |
77 | ASYNC_SPD_HI | ASYNC_SPEED_VHI | ASYNC_SESSION_LOCKOUT | \ | |
78 | ASYNC_PGRP_LOCKOUT | ASYNC_CALLOUT_NOHUP) | |
79 | ||
80 | #define RS_EVENT_WRITE_WAKEUP 0 | |
81 | ||
1da177e4 | 82 | static struct tty_driver *riscom_driver; |
1da177e4 | 83 | |
1da177e4 LT |
84 | static struct riscom_board rc_board[RC_NBOARD] = { |
85 | { | |
86 | .base = RC_IOBASE1, | |
87 | }, | |
88 | { | |
89 | .base = RC_IOBASE2, | |
90 | }, | |
91 | { | |
92 | .base = RC_IOBASE3, | |
93 | }, | |
94 | { | |
95 | .base = RC_IOBASE4, | |
96 | }, | |
97 | }; | |
98 | ||
99 | static struct riscom_port rc_port[RC_NBOARD * RC_NPORT]; | |
100 | ||
101 | /* RISCom/8 I/O ports addresses (without address translation) */ | |
102 | static unsigned short rc_ioport[] = { | |
fe971071 | 103 | #if 1 |
1da177e4 | 104 | 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x09, 0x0a, 0x0b, 0x0c, |
fe971071 | 105 | #else |
1da177e4 LT |
106 | 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x09, 0x0a, 0x0b, 0x0c, 0x10, |
107 | 0x11, 0x12, 0x18, 0x28, 0x31, 0x32, 0x39, 0x3a, 0x40, 0x41, 0x61, 0x62, | |
108 | 0x63, 0x64, 0x6b, 0x70, 0x71, 0x78, 0x7a, 0x7b, 0x7f, 0x100, 0x101 | |
fe971071 | 109 | #endif |
1da177e4 | 110 | }; |
fe971071 | 111 | #define RC_NIOPORT ARRAY_SIZE(rc_ioport) |
1da177e4 LT |
112 | |
113 | ||
114 | static inline int rc_paranoia_check(struct riscom_port const * port, | |
115 | char *name, const char *routine) | |
116 | { | |
117 | #ifdef RISCOM_PARANOIA_CHECK | |
118 | static const char badmagic[] = KERN_INFO | |
119 | "rc: Warning: bad riscom port magic number for device %s in %s\n"; | |
120 | static const char badinfo[] = KERN_INFO | |
121 | "rc: Warning: null riscom port for device %s in %s\n"; | |
122 | ||
123 | if (!port) { | |
124 | printk(badinfo, name, routine); | |
125 | return 1; | |
126 | } | |
127 | if (port->magic != RISCOM8_MAGIC) { | |
128 | printk(badmagic, name, routine); | |
129 | return 1; | |
130 | } | |
131 | #endif | |
132 | return 0; | |
133 | } | |
134 | ||
135 | /* | |
136 | * | |
137 | * Service functions for RISCom/8 driver. | |
138 | * | |
139 | */ | |
140 | ||
141 | /* Get board number from pointer */ | |
142 | static inline int board_No (struct riscom_board const * bp) | |
143 | { | |
144 | return bp - rc_board; | |
145 | } | |
146 | ||
147 | /* Get port number from pointer */ | |
148 | static inline int port_No (struct riscom_port const * port) | |
149 | { | |
150 | return RC_PORT(port - rc_port); | |
151 | } | |
152 | ||
153 | /* Get pointer to board from pointer to port */ | |
154 | static inline struct riscom_board * port_Board(struct riscom_port const * port) | |
155 | { | |
156 | return &rc_board[RC_BOARD(port - rc_port)]; | |
157 | } | |
158 | ||
159 | /* Input Byte from CL CD180 register */ | |
160 | static inline unsigned char rc_in(struct riscom_board const * bp, unsigned short reg) | |
161 | { | |
162 | return inb(bp->base + RC_TO_ISA(reg)); | |
163 | } | |
164 | ||
165 | /* Output Byte to CL CD180 register */ | |
166 | static inline void rc_out(struct riscom_board const * bp, unsigned short reg, | |
167 | unsigned char val) | |
168 | { | |
169 | outb(val, bp->base + RC_TO_ISA(reg)); | |
170 | } | |
171 | ||
172 | /* Wait for Channel Command Register ready */ | |
173 | static inline void rc_wait_CCR(struct riscom_board const * bp) | |
174 | { | |
175 | unsigned long delay; | |
176 | ||
177 | /* FIXME: need something more descriptive then 100000 :) */ | |
178 | for (delay = 100000; delay; delay--) | |
179 | if (!rc_in(bp, CD180_CCR)) | |
180 | return; | |
181 | ||
182 | printk(KERN_INFO "rc%d: Timeout waiting for CCR.\n", board_No(bp)); | |
183 | } | |
184 | ||
185 | /* | |
186 | * RISCom/8 probe functions. | |
187 | */ | |
188 | ||
189 | static inline int rc_request_io_range(struct riscom_board * const bp) | |
190 | { | |
191 | int i; | |
192 | ||
193 | for (i = 0; i < RC_NIOPORT; i++) | |
194 | if (!request_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1, | |
195 | "RISCom/8")) { | |
196 | goto out_release; | |
197 | } | |
198 | return 0; | |
199 | out_release: | |
200 | printk(KERN_INFO "rc%d: Skipping probe at 0x%03x. IO address in use.\n", | |
201 | board_No(bp), bp->base); | |
202 | while(--i >= 0) | |
203 | release_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1); | |
204 | return 1; | |
205 | } | |
206 | ||
207 | static inline void rc_release_io_range(struct riscom_board * const bp) | |
208 | { | |
209 | int i; | |
210 | ||
211 | for (i = 0; i < RC_NIOPORT; i++) | |
212 | release_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1); | |
213 | } | |
214 | ||
1da177e4 LT |
215 | /* Reset and setup CD180 chip */ |
216 | static void __init rc_init_CD180(struct riscom_board const * bp) | |
217 | { | |
218 | unsigned long flags; | |
219 | ||
220 | save_flags(flags); cli(); | |
221 | rc_out(bp, RC_CTOUT, 0); /* Clear timeout */ | |
222 | rc_wait_CCR(bp); /* Wait for CCR ready */ | |
223 | rc_out(bp, CD180_CCR, CCR_HARDRESET); /* Reset CD180 chip */ | |
224 | sti(); | |
c4ebd927 | 225 | msleep(50); /* Delay 0.05 sec */ |
1da177e4 LT |
226 | cli(); |
227 | rc_out(bp, CD180_GIVR, RC_ID); /* Set ID for this chip */ | |
228 | rc_out(bp, CD180_GICR, 0); /* Clear all bits */ | |
229 | rc_out(bp, CD180_PILR1, RC_ACK_MINT); /* Prio for modem intr */ | |
230 | rc_out(bp, CD180_PILR2, RC_ACK_TINT); /* Prio for transmitter intr */ | |
231 | rc_out(bp, CD180_PILR3, RC_ACK_RINT); /* Prio for receiver intr */ | |
232 | ||
233 | /* Setting up prescaler. We need 4 ticks per 1 ms */ | |
234 | rc_out(bp, CD180_PPRH, (RC_OSCFREQ/(1000000/RISCOM_TPS)) >> 8); | |
235 | rc_out(bp, CD180_PPRL, (RC_OSCFREQ/(1000000/RISCOM_TPS)) & 0xff); | |
236 | ||
237 | restore_flags(flags); | |
238 | } | |
239 | ||
240 | /* Main probing routine, also sets irq. */ | |
241 | static int __init rc_probe(struct riscom_board *bp) | |
242 | { | |
243 | unsigned char val1, val2; | |
244 | int irqs = 0; | |
245 | int retries; | |
246 | ||
247 | bp->irq = 0; | |
248 | ||
249 | if (rc_request_io_range(bp)) | |
250 | return 1; | |
251 | ||
252 | /* Are the I/O ports here ? */ | |
253 | rc_out(bp, CD180_PPRL, 0x5a); | |
254 | outb(0xff, 0x80); | |
255 | val1 = rc_in(bp, CD180_PPRL); | |
256 | rc_out(bp, CD180_PPRL, 0xa5); | |
257 | outb(0x00, 0x80); | |
258 | val2 = rc_in(bp, CD180_PPRL); | |
259 | ||
260 | if ((val1 != 0x5a) || (val2 != 0xa5)) { | |
261 | printk(KERN_ERR "rc%d: RISCom/8 Board at 0x%03x not found.\n", | |
262 | board_No(bp), bp->base); | |
263 | goto out_release; | |
264 | } | |
265 | ||
266 | /* It's time to find IRQ for this board */ | |
267 | for (retries = 0; retries < 5 && irqs <= 0; retries++) { | |
268 | irqs = probe_irq_on(); | |
269 | rc_init_CD180(bp); /* Reset CD180 chip */ | |
270 | rc_out(bp, CD180_CAR, 2); /* Select port 2 */ | |
271 | rc_wait_CCR(bp); | |
272 | rc_out(bp, CD180_CCR, CCR_TXEN); /* Enable transmitter */ | |
273 | rc_out(bp, CD180_IER, IER_TXRDY); /* Enable tx empty intr */ | |
c4ebd927 | 274 | msleep(50); |
1da177e4 LT |
275 | irqs = probe_irq_off(irqs); |
276 | val1 = rc_in(bp, RC_BSR); /* Get Board Status reg */ | |
277 | val2 = rc_in(bp, RC_ACK_TINT); /* ACK interrupt */ | |
278 | rc_init_CD180(bp); /* Reset CD180 again */ | |
279 | ||
280 | if ((val1 & RC_BSR_TINT) || (val2 != (RC_ID | GIVR_IT_TX))) { | |
281 | printk(KERN_ERR "rc%d: RISCom/8 Board at 0x%03x not " | |
282 | "found.\n", board_No(bp), bp->base); | |
283 | goto out_release; | |
284 | } | |
285 | } | |
286 | ||
287 | if (irqs <= 0) { | |
288 | printk(KERN_ERR "rc%d: Can't find IRQ for RISCom/8 board " | |
289 | "at 0x%03x.\n", board_No(bp), bp->base); | |
290 | goto out_release; | |
291 | } | |
292 | bp->irq = irqs; | |
293 | bp->flags |= RC_BOARD_PRESENT; | |
294 | ||
295 | printk(KERN_INFO "rc%d: RISCom/8 Rev. %c board detected at " | |
296 | "0x%03x, IRQ %d.\n", | |
297 | board_No(bp), | |
298 | (rc_in(bp, CD180_GFRCR) & 0x0f) + 'A', /* Board revision */ | |
299 | bp->base, bp->irq); | |
300 | ||
301 | return 0; | |
302 | out_release: | |
303 | rc_release_io_range(bp); | |
304 | return 1; | |
305 | } | |
306 | ||
307 | /* | |
308 | * | |
309 | * Interrupt processing routines. | |
310 | * | |
311 | */ | |
312 | ||
313 | static inline void rc_mark_event(struct riscom_port * port, int event) | |
314 | { | |
315 | set_bit(event, &port->event); | |
316 | schedule_work(&port->tqueue); | |
317 | } | |
318 | ||
319 | static inline struct riscom_port * rc_get_port(struct riscom_board const * bp, | |
320 | unsigned char const * what) | |
321 | { | |
322 | unsigned char channel; | |
323 | struct riscom_port * port; | |
324 | ||
325 | channel = rc_in(bp, CD180_GICR) >> GICR_CHAN_OFF; | |
326 | if (channel < CD180_NCH) { | |
327 | port = &rc_port[board_No(bp) * RC_NPORT + channel]; | |
328 | if (port->flags & ASYNC_INITIALIZED) { | |
329 | return port; | |
330 | } | |
331 | } | |
332 | printk(KERN_ERR "rc%d: %s interrupt from invalid port %d\n", | |
333 | board_No(bp), what, channel); | |
334 | return NULL; | |
335 | } | |
336 | ||
337 | static inline void rc_receive_exc(struct riscom_board const * bp) | |
338 | { | |
339 | struct riscom_port *port; | |
340 | struct tty_struct *tty; | |
341 | unsigned char status; | |
33f0f88f | 342 | unsigned char ch, flag; |
1da177e4 LT |
343 | |
344 | if (!(port = rc_get_port(bp, "Receive"))) | |
345 | return; | |
346 | ||
347 | tty = port->tty; | |
1da177e4 LT |
348 | |
349 | #ifdef RC_REPORT_OVERRUN | |
350 | status = rc_in(bp, CD180_RCSR); | |
33f0f88f | 351 | if (status & RCSR_OE) |
1da177e4 | 352 | port->overrun++; |
1da177e4 LT |
353 | status &= port->mark_mask; |
354 | #else | |
355 | status = rc_in(bp, CD180_RCSR) & port->mark_mask; | |
356 | #endif | |
357 | ch = rc_in(bp, CD180_RDR); | |
358 | if (!status) { | |
359 | return; | |
360 | } | |
361 | if (status & RCSR_TOUT) { | |
362 | printk(KERN_WARNING "rc%d: port %d: Receiver timeout. " | |
363 | "Hardware problems ?\n", | |
364 | board_No(bp), port_No(port)); | |
365 | return; | |
366 | ||
367 | } else if (status & RCSR_BREAK) { | |
368 | printk(KERN_INFO "rc%d: port %d: Handling break...\n", | |
369 | board_No(bp), port_No(port)); | |
33f0f88f | 370 | flag = TTY_BREAK; |
1da177e4 LT |
371 | if (port->flags & ASYNC_SAK) |
372 | do_SAK(tty); | |
373 | ||
374 | } else if (status & RCSR_PE) | |
33f0f88f | 375 | flag = TTY_PARITY; |
1da177e4 LT |
376 | |
377 | else if (status & RCSR_FE) | |
33f0f88f | 378 | flag = TTY_FRAME; |
1da177e4 LT |
379 | |
380 | else if (status & RCSR_OE) | |
33f0f88f | 381 | flag = TTY_OVERRUN; |
1da177e4 LT |
382 | |
383 | else | |
33f0f88f | 384 | flag = TTY_NORMAL; |
1da177e4 | 385 | |
33f0f88f AC |
386 | tty_insert_flip_char(tty, ch, flag); |
387 | tty_flip_buffer_push(tty); | |
1da177e4 LT |
388 | } |
389 | ||
390 | static inline void rc_receive(struct riscom_board const * bp) | |
391 | { | |
392 | struct riscom_port *port; | |
393 | struct tty_struct *tty; | |
394 | unsigned char count; | |
395 | ||
396 | if (!(port = rc_get_port(bp, "Receive"))) | |
397 | return; | |
398 | ||
399 | tty = port->tty; | |
400 | ||
401 | count = rc_in(bp, CD180_RDCR); | |
402 | ||
403 | #ifdef RC_REPORT_FIFO | |
404 | port->hits[count > 8 ? 9 : count]++; | |
405 | #endif | |
406 | ||
407 | while (count--) { | |
33f0f88f | 408 | if (tty_buffer_request_room(tty, 1) == 0) { |
1da177e4 LT |
409 | printk(KERN_WARNING "rc%d: port %d: Working around " |
410 | "flip buffer overflow.\n", | |
411 | board_No(bp), port_No(port)); | |
412 | break; | |
413 | } | |
33f0f88f | 414 | tty_insert_flip_char(tty, rc_in(bp, CD180_RDR), TTY_NORMAL); |
1da177e4 | 415 | } |
33f0f88f | 416 | tty_flip_buffer_push(tty); |
1da177e4 LT |
417 | } |
418 | ||
419 | static inline void rc_transmit(struct riscom_board const * bp) | |
420 | { | |
421 | struct riscom_port *port; | |
422 | struct tty_struct *tty; | |
423 | unsigned char count; | |
424 | ||
425 | ||
426 | if (!(port = rc_get_port(bp, "Transmit"))) | |
427 | return; | |
428 | ||
429 | tty = port->tty; | |
430 | ||
431 | if (port->IER & IER_TXEMPTY) { | |
432 | /* FIFO drained */ | |
433 | rc_out(bp, CD180_CAR, port_No(port)); | |
434 | port->IER &= ~IER_TXEMPTY; | |
435 | rc_out(bp, CD180_IER, port->IER); | |
436 | return; | |
437 | } | |
438 | ||
439 | if ((port->xmit_cnt <= 0 && !port->break_length) | |
440 | || tty->stopped || tty->hw_stopped) { | |
441 | rc_out(bp, CD180_CAR, port_No(port)); | |
442 | port->IER &= ~IER_TXRDY; | |
443 | rc_out(bp, CD180_IER, port->IER); | |
444 | return; | |
445 | } | |
446 | ||
447 | if (port->break_length) { | |
448 | if (port->break_length > 0) { | |
449 | if (port->COR2 & COR2_ETC) { | |
450 | rc_out(bp, CD180_TDR, CD180_C_ESC); | |
451 | rc_out(bp, CD180_TDR, CD180_C_SBRK); | |
452 | port->COR2 &= ~COR2_ETC; | |
453 | } | |
454 | count = min_t(int, port->break_length, 0xff); | |
455 | rc_out(bp, CD180_TDR, CD180_C_ESC); | |
456 | rc_out(bp, CD180_TDR, CD180_C_DELAY); | |
457 | rc_out(bp, CD180_TDR, count); | |
458 | if (!(port->break_length -= count)) | |
459 | port->break_length--; | |
460 | } else { | |
461 | rc_out(bp, CD180_TDR, CD180_C_ESC); | |
462 | rc_out(bp, CD180_TDR, CD180_C_EBRK); | |
463 | rc_out(bp, CD180_COR2, port->COR2); | |
464 | rc_wait_CCR(bp); | |
465 | rc_out(bp, CD180_CCR, CCR_CORCHG2); | |
466 | port->break_length = 0; | |
467 | } | |
468 | return; | |
469 | } | |
470 | ||
471 | count = CD180_NFIFO; | |
472 | do { | |
473 | rc_out(bp, CD180_TDR, port->xmit_buf[port->xmit_tail++]); | |
474 | port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1); | |
475 | if (--port->xmit_cnt <= 0) | |
476 | break; | |
477 | } while (--count > 0); | |
478 | ||
479 | if (port->xmit_cnt <= 0) { | |
480 | rc_out(bp, CD180_CAR, port_No(port)); | |
481 | port->IER &= ~IER_TXRDY; | |
482 | rc_out(bp, CD180_IER, port->IER); | |
483 | } | |
484 | if (port->xmit_cnt <= port->wakeup_chars) | |
485 | rc_mark_event(port, RS_EVENT_WRITE_WAKEUP); | |
486 | } | |
487 | ||
488 | static inline void rc_check_modem(struct riscom_board const * bp) | |
489 | { | |
490 | struct riscom_port *port; | |
491 | struct tty_struct *tty; | |
492 | unsigned char mcr; | |
493 | ||
494 | if (!(port = rc_get_port(bp, "Modem"))) | |
495 | return; | |
496 | ||
497 | tty = port->tty; | |
498 | ||
499 | mcr = rc_in(bp, CD180_MCR); | |
500 | if (mcr & MCR_CDCHG) { | |
501 | if (rc_in(bp, CD180_MSVR) & MSVR_CD) | |
502 | wake_up_interruptible(&port->open_wait); | |
503 | else | |
504 | schedule_work(&port->tqueue_hangup); | |
505 | } | |
506 | ||
507 | #ifdef RISCOM_BRAIN_DAMAGED_CTS | |
508 | if (mcr & MCR_CTSCHG) { | |
509 | if (rc_in(bp, CD180_MSVR) & MSVR_CTS) { | |
510 | tty->hw_stopped = 0; | |
511 | port->IER |= IER_TXRDY; | |
512 | if (port->xmit_cnt <= port->wakeup_chars) | |
513 | rc_mark_event(port, RS_EVENT_WRITE_WAKEUP); | |
514 | } else { | |
515 | tty->hw_stopped = 1; | |
516 | port->IER &= ~IER_TXRDY; | |
517 | } | |
518 | rc_out(bp, CD180_IER, port->IER); | |
519 | } | |
520 | if (mcr & MCR_DSRCHG) { | |
521 | if (rc_in(bp, CD180_MSVR) & MSVR_DSR) { | |
522 | tty->hw_stopped = 0; | |
523 | port->IER |= IER_TXRDY; | |
524 | if (port->xmit_cnt <= port->wakeup_chars) | |
525 | rc_mark_event(port, RS_EVENT_WRITE_WAKEUP); | |
526 | } else { | |
527 | tty->hw_stopped = 1; | |
528 | port->IER &= ~IER_TXRDY; | |
529 | } | |
530 | rc_out(bp, CD180_IER, port->IER); | |
531 | } | |
532 | #endif /* RISCOM_BRAIN_DAMAGED_CTS */ | |
533 | ||
534 | /* Clear change bits */ | |
535 | rc_out(bp, CD180_MCR, 0); | |
536 | } | |
537 | ||
538 | /* The main interrupt processing routine */ | |
f07ef395 | 539 | static irqreturn_t rc_interrupt(int dummy, void * dev_id) |
1da177e4 LT |
540 | { |
541 | unsigned char status; | |
542 | unsigned char ack; | |
f07ef395 | 543 | struct riscom_board *bp = dev_id; |
1da177e4 LT |
544 | unsigned long loop = 0; |
545 | int handled = 0; | |
546 | ||
c7bec5ab | 547 | if (!(bp->flags & RC_BOARD_ACTIVE)) |
1da177e4 | 548 | return IRQ_NONE; |
c7bec5ab | 549 | |
1da177e4 LT |
550 | while ((++loop < 16) && ((status = ~(rc_in(bp, RC_BSR))) & |
551 | (RC_BSR_TOUT | RC_BSR_TINT | | |
552 | RC_BSR_MINT | RC_BSR_RINT))) { | |
553 | handled = 1; | |
554 | if (status & RC_BSR_TOUT) | |
555 | printk(KERN_WARNING "rc%d: Got timeout. Hardware " | |
556 | "error?\n", board_No(bp)); | |
557 | ||
558 | else if (status & RC_BSR_RINT) { | |
559 | ack = rc_in(bp, RC_ACK_RINT); | |
560 | ||
561 | if (ack == (RC_ID | GIVR_IT_RCV)) | |
562 | rc_receive(bp); | |
563 | else if (ack == (RC_ID | GIVR_IT_REXC)) | |
564 | rc_receive_exc(bp); | |
565 | else | |
566 | printk(KERN_WARNING "rc%d: Bad receive ack " | |
567 | "0x%02x.\n", | |
568 | board_No(bp), ack); | |
569 | ||
570 | } else if (status & RC_BSR_TINT) { | |
571 | ack = rc_in(bp, RC_ACK_TINT); | |
572 | ||
573 | if (ack == (RC_ID | GIVR_IT_TX)) | |
574 | rc_transmit(bp); | |
575 | else | |
576 | printk(KERN_WARNING "rc%d: Bad transmit ack " | |
577 | "0x%02x.\n", | |
578 | board_No(bp), ack); | |
579 | ||
580 | } else /* if (status & RC_BSR_MINT) */ { | |
581 | ack = rc_in(bp, RC_ACK_MINT); | |
582 | ||
583 | if (ack == (RC_ID | GIVR_IT_MODEM)) | |
584 | rc_check_modem(bp); | |
585 | else | |
586 | printk(KERN_WARNING "rc%d: Bad modem ack " | |
587 | "0x%02x.\n", | |
588 | board_No(bp), ack); | |
589 | ||
590 | } | |
591 | ||
592 | rc_out(bp, CD180_EOIR, 0); /* Mark end of interrupt */ | |
593 | rc_out(bp, RC_CTOUT, 0); /* Clear timeout flag */ | |
594 | } | |
595 | return IRQ_RETVAL(handled); | |
596 | } | |
597 | ||
598 | /* | |
599 | * Routines for open & close processing. | |
600 | */ | |
601 | ||
602 | /* Called with disabled interrupts */ | |
f07ef395 | 603 | static int rc_setup_board(struct riscom_board * bp) |
1da177e4 LT |
604 | { |
605 | int error; | |
606 | ||
607 | if (bp->flags & RC_BOARD_ACTIVE) | |
608 | return 0; | |
609 | ||
0f2ed4c6 | 610 | error = request_irq(bp->irq, rc_interrupt, IRQF_DISABLED, |
f07ef395 | 611 | "RISCom/8", bp); |
1da177e4 LT |
612 | if (error) |
613 | return error; | |
614 | ||
615 | rc_out(bp, RC_CTOUT, 0); /* Just in case */ | |
616 | bp->DTR = ~0; | |
617 | rc_out(bp, RC_DTR, bp->DTR); /* Drop DTR on all ports */ | |
618 | ||
1da177e4 LT |
619 | bp->flags |= RC_BOARD_ACTIVE; |
620 | ||
621 | return 0; | |
622 | } | |
623 | ||
624 | /* Called with disabled interrupts */ | |
f07ef395 | 625 | static void rc_shutdown_board(struct riscom_board *bp) |
1da177e4 LT |
626 | { |
627 | if (!(bp->flags & RC_BOARD_ACTIVE)) | |
628 | return; | |
629 | ||
630 | bp->flags &= ~RC_BOARD_ACTIVE; | |
631 | ||
632 | free_irq(bp->irq, NULL); | |
1da177e4 LT |
633 | |
634 | bp->DTR = ~0; | |
635 | rc_out(bp, RC_DTR, bp->DTR); /* Drop DTR on all ports */ | |
636 | ||
637 | } | |
638 | ||
639 | /* | |
640 | * Setting up port characteristics. | |
641 | * Must be called with disabled interrupts | |
642 | */ | |
643 | static void rc_change_speed(struct riscom_board *bp, struct riscom_port *port) | |
644 | { | |
645 | struct tty_struct *tty; | |
646 | unsigned long baud; | |
647 | long tmp; | |
648 | unsigned char cor1 = 0, cor3 = 0; | |
649 | unsigned char mcor1 = 0, mcor2 = 0; | |
650 | ||
651 | if (!(tty = port->tty) || !tty->termios) | |
652 | return; | |
653 | ||
654 | port->IER = 0; | |
655 | port->COR2 = 0; | |
656 | port->MSVR = MSVR_RTS; | |
657 | ||
c7bce309 | 658 | baud = tty_get_baud_rate(tty); |
1da177e4 LT |
659 | |
660 | /* Select port on the board */ | |
661 | rc_out(bp, CD180_CAR, port_No(port)); | |
662 | ||
c7bce309 | 663 | if (!baud) { |
1da177e4 LT |
664 | /* Drop DTR & exit */ |
665 | bp->DTR |= (1u << port_No(port)); | |
666 | rc_out(bp, RC_DTR, bp->DTR); | |
667 | return; | |
668 | } else { | |
669 | /* Set DTR on */ | |
670 | bp->DTR &= ~(1u << port_No(port)); | |
671 | rc_out(bp, RC_DTR, bp->DTR); | |
672 | } | |
673 | ||
674 | /* | |
675 | * Now we must calculate some speed depended things | |
676 | */ | |
677 | ||
678 | /* Set baud rate for port */ | |
c7bce309 | 679 | tmp = (((RC_OSCFREQ + baud/2) / baud + |
1da177e4 LT |
680 | CD180_TPC/2) / CD180_TPC); |
681 | ||
682 | rc_out(bp, CD180_RBPRH, (tmp >> 8) & 0xff); | |
683 | rc_out(bp, CD180_TBPRH, (tmp >> 8) & 0xff); | |
684 | rc_out(bp, CD180_RBPRL, tmp & 0xff); | |
685 | rc_out(bp, CD180_TBPRL, tmp & 0xff); | |
686 | ||
c7bce309 | 687 | baud = (baud + 5) / 10; /* Estimated CPS */ |
1da177e4 LT |
688 | |
689 | /* Two timer ticks seems enough to wakeup something like SLIP driver */ | |
690 | tmp = ((baud + HZ/2) / HZ) * 2 - CD180_NFIFO; | |
691 | port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ? | |
692 | SERIAL_XMIT_SIZE - 1 : tmp); | |
693 | ||
694 | /* Receiver timeout will be transmission time for 1.5 chars */ | |
695 | tmp = (RISCOM_TPS + RISCOM_TPS/2 + baud/2) / baud; | |
696 | tmp = (tmp > 0xff) ? 0xff : tmp; | |
697 | rc_out(bp, CD180_RTPR, tmp); | |
698 | ||
699 | switch (C_CSIZE(tty)) { | |
700 | case CS5: | |
701 | cor1 |= COR1_5BITS; | |
702 | break; | |
703 | case CS6: | |
704 | cor1 |= COR1_6BITS; | |
705 | break; | |
706 | case CS7: | |
707 | cor1 |= COR1_7BITS; | |
708 | break; | |
709 | case CS8: | |
710 | cor1 |= COR1_8BITS; | |
711 | break; | |
712 | } | |
713 | ||
714 | if (C_CSTOPB(tty)) | |
715 | cor1 |= COR1_2SB; | |
716 | ||
717 | cor1 |= COR1_IGNORE; | |
718 | if (C_PARENB(tty)) { | |
719 | cor1 |= COR1_NORMPAR; | |
720 | if (C_PARODD(tty)) | |
721 | cor1 |= COR1_ODDP; | |
722 | if (I_INPCK(tty)) | |
723 | cor1 &= ~COR1_IGNORE; | |
724 | } | |
725 | /* Set marking of some errors */ | |
726 | port->mark_mask = RCSR_OE | RCSR_TOUT; | |
727 | if (I_INPCK(tty)) | |
728 | port->mark_mask |= RCSR_FE | RCSR_PE; | |
729 | if (I_BRKINT(tty) || I_PARMRK(tty)) | |
730 | port->mark_mask |= RCSR_BREAK; | |
731 | if (I_IGNPAR(tty)) | |
732 | port->mark_mask &= ~(RCSR_FE | RCSR_PE); | |
733 | if (I_IGNBRK(tty)) { | |
734 | port->mark_mask &= ~RCSR_BREAK; | |
735 | if (I_IGNPAR(tty)) | |
736 | /* Real raw mode. Ignore all */ | |
737 | port->mark_mask &= ~RCSR_OE; | |
738 | } | |
739 | /* Enable Hardware Flow Control */ | |
740 | if (C_CRTSCTS(tty)) { | |
741 | #ifdef RISCOM_BRAIN_DAMAGED_CTS | |
742 | port->IER |= IER_DSR | IER_CTS; | |
743 | mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD; | |
744 | mcor2 |= MCOR2_DSROD | MCOR2_CTSOD; | |
745 | tty->hw_stopped = !(rc_in(bp, CD180_MSVR) & (MSVR_CTS|MSVR_DSR)); | |
746 | #else | |
747 | port->COR2 |= COR2_CTSAE; | |
748 | #endif | |
749 | } | |
750 | /* Enable Software Flow Control. FIXME: I'm not sure about this */ | |
751 | /* Some people reported that it works, but I still doubt */ | |
752 | if (I_IXON(tty)) { | |
753 | port->COR2 |= COR2_TXIBE; | |
754 | cor3 |= (COR3_FCT | COR3_SCDE); | |
755 | if (I_IXANY(tty)) | |
756 | port->COR2 |= COR2_IXM; | |
757 | rc_out(bp, CD180_SCHR1, START_CHAR(tty)); | |
758 | rc_out(bp, CD180_SCHR2, STOP_CHAR(tty)); | |
759 | rc_out(bp, CD180_SCHR3, START_CHAR(tty)); | |
760 | rc_out(bp, CD180_SCHR4, STOP_CHAR(tty)); | |
761 | } | |
762 | if (!C_CLOCAL(tty)) { | |
763 | /* Enable CD check */ | |
764 | port->IER |= IER_CD; | |
765 | mcor1 |= MCOR1_CDZD; | |
766 | mcor2 |= MCOR2_CDOD; | |
767 | } | |
768 | ||
769 | if (C_CREAD(tty)) | |
770 | /* Enable receiver */ | |
771 | port->IER |= IER_RXD; | |
772 | ||
773 | /* Set input FIFO size (1-8 bytes) */ | |
774 | cor3 |= RISCOM_RXFIFO; | |
775 | /* Setting up CD180 channel registers */ | |
776 | rc_out(bp, CD180_COR1, cor1); | |
777 | rc_out(bp, CD180_COR2, port->COR2); | |
778 | rc_out(bp, CD180_COR3, cor3); | |
779 | /* Make CD180 know about registers change */ | |
780 | rc_wait_CCR(bp); | |
781 | rc_out(bp, CD180_CCR, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3); | |
782 | /* Setting up modem option registers */ | |
783 | rc_out(bp, CD180_MCOR1, mcor1); | |
784 | rc_out(bp, CD180_MCOR2, mcor2); | |
785 | /* Enable CD180 transmitter & receiver */ | |
786 | rc_wait_CCR(bp); | |
787 | rc_out(bp, CD180_CCR, CCR_TXEN | CCR_RXEN); | |
788 | /* Enable interrupts */ | |
789 | rc_out(bp, CD180_IER, port->IER); | |
790 | /* And finally set RTS on */ | |
791 | rc_out(bp, CD180_MSVR, port->MSVR); | |
792 | } | |
793 | ||
794 | /* Must be called with interrupts enabled */ | |
795 | static int rc_setup_port(struct riscom_board *bp, struct riscom_port *port) | |
796 | { | |
797 | unsigned long flags; | |
798 | ||
799 | if (port->flags & ASYNC_INITIALIZED) | |
800 | return 0; | |
801 | ||
802 | if (!port->xmit_buf) { | |
803 | /* We may sleep in get_zeroed_page() */ | |
804 | unsigned long tmp; | |
805 | ||
806 | if (!(tmp = get_zeroed_page(GFP_KERNEL))) | |
807 | return -ENOMEM; | |
808 | ||
809 | if (port->xmit_buf) { | |
810 | free_page(tmp); | |
811 | return -ERESTARTSYS; | |
812 | } | |
813 | port->xmit_buf = (unsigned char *) tmp; | |
814 | } | |
815 | ||
816 | save_flags(flags); cli(); | |
817 | ||
818 | if (port->tty) | |
819 | clear_bit(TTY_IO_ERROR, &port->tty->flags); | |
820 | ||
821 | if (port->count == 1) | |
822 | bp->count++; | |
823 | ||
824 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; | |
825 | rc_change_speed(bp, port); | |
826 | port->flags |= ASYNC_INITIALIZED; | |
827 | ||
828 | restore_flags(flags); | |
829 | return 0; | |
830 | } | |
831 | ||
832 | /* Must be called with interrupts disabled */ | |
833 | static void rc_shutdown_port(struct riscom_board *bp, struct riscom_port *port) | |
834 | { | |
835 | struct tty_struct *tty; | |
836 | ||
837 | if (!(port->flags & ASYNC_INITIALIZED)) | |
838 | return; | |
839 | ||
840 | #ifdef RC_REPORT_OVERRUN | |
841 | printk(KERN_INFO "rc%d: port %d: Total %ld overruns were detected.\n", | |
842 | board_No(bp), port_No(port), port->overrun); | |
843 | #endif | |
844 | #ifdef RC_REPORT_FIFO | |
845 | { | |
846 | int i; | |
847 | ||
848 | printk(KERN_INFO "rc%d: port %d: FIFO hits [ ", | |
849 | board_No(bp), port_No(port)); | |
850 | for (i = 0; i < 10; i++) { | |
851 | printk("%ld ", port->hits[i]); | |
852 | } | |
853 | printk("].\n"); | |
854 | } | |
855 | #endif | |
856 | if (port->xmit_buf) { | |
857 | free_page((unsigned long) port->xmit_buf); | |
858 | port->xmit_buf = NULL; | |
859 | } | |
860 | ||
861 | if (!(tty = port->tty) || C_HUPCL(tty)) { | |
862 | /* Drop DTR */ | |
863 | bp->DTR |= (1u << port_No(port)); | |
864 | rc_out(bp, RC_DTR, bp->DTR); | |
865 | } | |
866 | ||
867 | /* Select port */ | |
868 | rc_out(bp, CD180_CAR, port_No(port)); | |
869 | /* Reset port */ | |
870 | rc_wait_CCR(bp); | |
871 | rc_out(bp, CD180_CCR, CCR_SOFTRESET); | |
872 | /* Disable all interrupts from this port */ | |
873 | port->IER = 0; | |
874 | rc_out(bp, CD180_IER, port->IER); | |
875 | ||
876 | if (tty) | |
877 | set_bit(TTY_IO_ERROR, &tty->flags); | |
878 | port->flags &= ~ASYNC_INITIALIZED; | |
879 | ||
880 | if (--bp->count < 0) { | |
881 | printk(KERN_INFO "rc%d: rc_shutdown_port: " | |
882 | "bad board count: %d\n", | |
883 | board_No(bp), bp->count); | |
884 | bp->count = 0; | |
885 | } | |
886 | ||
887 | /* | |
888 | * If this is the last opened port on the board | |
889 | * shutdown whole board | |
890 | */ | |
891 | if (!bp->count) | |
892 | rc_shutdown_board(bp); | |
893 | } | |
894 | ||
895 | ||
896 | static int block_til_ready(struct tty_struct *tty, struct file * filp, | |
897 | struct riscom_port *port) | |
898 | { | |
899 | DECLARE_WAITQUEUE(wait, current); | |
900 | struct riscom_board *bp = port_Board(port); | |
901 | int retval; | |
902 | int do_clocal = 0; | |
903 | int CD; | |
904 | ||
905 | /* | |
906 | * If the device is in the middle of being closed, then block | |
907 | * until it's done, and then try again. | |
908 | */ | |
909 | if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { | |
910 | interruptible_sleep_on(&port->close_wait); | |
911 | if (port->flags & ASYNC_HUP_NOTIFY) | |
912 | return -EAGAIN; | |
913 | else | |
914 | return -ERESTARTSYS; | |
915 | } | |
916 | ||
917 | /* | |
918 | * If non-blocking mode is set, or the port is not enabled, | |
919 | * then make the check up front and then exit. | |
920 | */ | |
921 | if ((filp->f_flags & O_NONBLOCK) || | |
922 | (tty->flags & (1 << TTY_IO_ERROR))) { | |
923 | port->flags |= ASYNC_NORMAL_ACTIVE; | |
924 | return 0; | |
925 | } | |
926 | ||
927 | if (C_CLOCAL(tty)) | |
928 | do_clocal = 1; | |
929 | ||
930 | /* | |
931 | * Block waiting for the carrier detect and the line to become | |
932 | * free (i.e., not in use by the callout). While we are in | |
933 | * this loop, info->count is dropped by one, so that | |
934 | * rs_close() knows when to free things. We restore it upon | |
935 | * exit, either normal or abnormal. | |
936 | */ | |
937 | retval = 0; | |
938 | add_wait_queue(&port->open_wait, &wait); | |
939 | cli(); | |
940 | if (!tty_hung_up_p(filp)) | |
941 | port->count--; | |
942 | sti(); | |
943 | port->blocked_open++; | |
944 | while (1) { | |
945 | cli(); | |
946 | rc_out(bp, CD180_CAR, port_No(port)); | |
947 | CD = rc_in(bp, CD180_MSVR) & MSVR_CD; | |
948 | rc_out(bp, CD180_MSVR, MSVR_RTS); | |
949 | bp->DTR &= ~(1u << port_No(port)); | |
950 | rc_out(bp, RC_DTR, bp->DTR); | |
951 | sti(); | |
952 | set_current_state(TASK_INTERRUPTIBLE); | |
953 | if (tty_hung_up_p(filp) || | |
954 | !(port->flags & ASYNC_INITIALIZED)) { | |
955 | if (port->flags & ASYNC_HUP_NOTIFY) | |
956 | retval = -EAGAIN; | |
957 | else | |
958 | retval = -ERESTARTSYS; | |
959 | break; | |
960 | } | |
961 | if (!(port->flags & ASYNC_CLOSING) && | |
962 | (do_clocal || CD)) | |
963 | break; | |
964 | if (signal_pending(current)) { | |
965 | retval = -ERESTARTSYS; | |
966 | break; | |
967 | } | |
968 | schedule(); | |
969 | } | |
cc0a8fbb | 970 | __set_current_state(TASK_RUNNING); |
1da177e4 LT |
971 | remove_wait_queue(&port->open_wait, &wait); |
972 | if (!tty_hung_up_p(filp)) | |
973 | port->count++; | |
974 | port->blocked_open--; | |
975 | if (retval) | |
976 | return retval; | |
977 | ||
978 | port->flags |= ASYNC_NORMAL_ACTIVE; | |
979 | return 0; | |
980 | } | |
981 | ||
982 | static int rc_open(struct tty_struct * tty, struct file * filp) | |
983 | { | |
984 | int board; | |
985 | int error; | |
986 | struct riscom_port * port; | |
987 | struct riscom_board * bp; | |
988 | ||
989 | board = RC_BOARD(tty->index); | |
990 | if (board >= RC_NBOARD || !(rc_board[board].flags & RC_BOARD_PRESENT)) | |
991 | return -ENODEV; | |
992 | ||
993 | bp = &rc_board[board]; | |
994 | port = rc_port + board * RC_NPORT + RC_PORT(tty->index); | |
995 | if (rc_paranoia_check(port, tty->name, "rc_open")) | |
996 | return -ENODEV; | |
997 | ||
998 | if ((error = rc_setup_board(bp))) | |
999 | return error; | |
1000 | ||
1001 | port->count++; | |
1002 | tty->driver_data = port; | |
1003 | port->tty = tty; | |
1004 | ||
1005 | if ((error = rc_setup_port(bp, port))) | |
1006 | return error; | |
1007 | ||
1008 | if ((error = block_til_ready(tty, filp, port))) | |
1009 | return error; | |
1010 | ||
1011 | return 0; | |
1012 | } | |
1013 | ||
1014 | static void rc_close(struct tty_struct * tty, struct file * filp) | |
1015 | { | |
1016 | struct riscom_port *port = (struct riscom_port *) tty->driver_data; | |
1017 | struct riscom_board *bp; | |
1018 | unsigned long flags; | |
1019 | unsigned long timeout; | |
1020 | ||
1021 | if (!port || rc_paranoia_check(port, tty->name, "close")) | |
1022 | return; | |
1023 | ||
1024 | save_flags(flags); cli(); | |
1025 | if (tty_hung_up_p(filp)) | |
1026 | goto out; | |
1027 | ||
1028 | bp = port_Board(port); | |
1029 | if ((tty->count == 1) && (port->count != 1)) { | |
1030 | printk(KERN_INFO "rc%d: rc_close: bad port count;" | |
1031 | " tty->count is 1, port count is %d\n", | |
1032 | board_No(bp), port->count); | |
1033 | port->count = 1; | |
1034 | } | |
1035 | if (--port->count < 0) { | |
1036 | printk(KERN_INFO "rc%d: rc_close: bad port count " | |
1037 | "for tty%d: %d\n", | |
1038 | board_No(bp), port_No(port), port->count); | |
1039 | port->count = 0; | |
1040 | } | |
1041 | if (port->count) | |
1042 | goto out; | |
1043 | port->flags |= ASYNC_CLOSING; | |
1044 | /* | |
1045 | * Now we wait for the transmit buffer to clear; and we notify | |
1046 | * the line discipline to only process XON/XOFF characters. | |
1047 | */ | |
1048 | tty->closing = 1; | |
1049 | if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) | |
1050 | tty_wait_until_sent(tty, port->closing_wait); | |
1051 | /* | |
1052 | * At this point we stop accepting input. To do this, we | |
1053 | * disable the receive line status interrupts, and tell the | |
1054 | * interrupt driver to stop checking the data ready bit in the | |
1055 | * line status register. | |
1056 | */ | |
1057 | port->IER &= ~IER_RXD; | |
1058 | if (port->flags & ASYNC_INITIALIZED) { | |
1059 | port->IER &= ~IER_TXRDY; | |
1060 | port->IER |= IER_TXEMPTY; | |
1061 | rc_out(bp, CD180_CAR, port_No(port)); | |
1062 | rc_out(bp, CD180_IER, port->IER); | |
1063 | /* | |
1064 | * Before we drop DTR, make sure the UART transmitter | |
1065 | * has completely drained; this is especially | |
1066 | * important if there is a transmit FIFO! | |
1067 | */ | |
1068 | timeout = jiffies+HZ; | |
1069 | while(port->IER & IER_TXEMPTY) { | |
1070 | msleep_interruptible(jiffies_to_msecs(port->timeout)); | |
1071 | if (time_after(jiffies, timeout)) | |
1072 | break; | |
1073 | } | |
1074 | } | |
1075 | rc_shutdown_port(bp, port); | |
1076 | if (tty->driver->flush_buffer) | |
1077 | tty->driver->flush_buffer(tty); | |
1078 | tty_ldisc_flush(tty); | |
1079 | ||
1080 | tty->closing = 0; | |
1081 | port->event = 0; | |
1082 | port->tty = NULL; | |
1083 | if (port->blocked_open) { | |
1084 | if (port->close_delay) { | |
1085 | msleep_interruptible(jiffies_to_msecs(port->close_delay)); | |
1086 | } | |
1087 | wake_up_interruptible(&port->open_wait); | |
1088 | } | |
1089 | port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); | |
1090 | wake_up_interruptible(&port->close_wait); | |
1091 | out: restore_flags(flags); | |
1092 | } | |
1093 | ||
1094 | static int rc_write(struct tty_struct * tty, | |
1095 | const unsigned char *buf, int count) | |
1096 | { | |
1097 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1098 | struct riscom_board *bp; | |
1099 | int c, total = 0; | |
1100 | unsigned long flags; | |
1101 | ||
1102 | if (rc_paranoia_check(port, tty->name, "rc_write")) | |
1103 | return 0; | |
1104 | ||
1105 | bp = port_Board(port); | |
1106 | ||
b3218a79 | 1107 | if (!tty || !port->xmit_buf) |
1da177e4 LT |
1108 | return 0; |
1109 | ||
1110 | save_flags(flags); | |
1111 | while (1) { | |
1112 | cli(); | |
1113 | c = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1, | |
1114 | SERIAL_XMIT_SIZE - port->xmit_head)); | |
1115 | if (c <= 0) { | |
1116 | restore_flags(flags); | |
1117 | break; | |
1118 | } | |
1119 | ||
1120 | memcpy(port->xmit_buf + port->xmit_head, buf, c); | |
1121 | port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1); | |
1122 | port->xmit_cnt += c; | |
1123 | restore_flags(flags); | |
1124 | ||
1125 | buf += c; | |
1126 | count -= c; | |
1127 | total += c; | |
1128 | } | |
1129 | ||
1130 | cli(); | |
1131 | if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped && | |
1132 | !(port->IER & IER_TXRDY)) { | |
1133 | port->IER |= IER_TXRDY; | |
1134 | rc_out(bp, CD180_CAR, port_No(port)); | |
1135 | rc_out(bp, CD180_IER, port->IER); | |
1136 | } | |
1137 | restore_flags(flags); | |
1138 | ||
1139 | return total; | |
1140 | } | |
1141 | ||
1142 | static void rc_put_char(struct tty_struct * tty, unsigned char ch) | |
1143 | { | |
1144 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1145 | unsigned long flags; | |
1146 | ||
1147 | if (rc_paranoia_check(port, tty->name, "rc_put_char")) | |
1148 | return; | |
1149 | ||
1150 | if (!tty || !port->xmit_buf) | |
1151 | return; | |
1152 | ||
1153 | save_flags(flags); cli(); | |
1154 | ||
1155 | if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) | |
1156 | goto out; | |
1157 | ||
1158 | port->xmit_buf[port->xmit_head++] = ch; | |
1159 | port->xmit_head &= SERIAL_XMIT_SIZE - 1; | |
1160 | port->xmit_cnt++; | |
1161 | out: restore_flags(flags); | |
1162 | } | |
1163 | ||
1164 | static void rc_flush_chars(struct tty_struct * tty) | |
1165 | { | |
1166 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1167 | unsigned long flags; | |
1168 | ||
1169 | if (rc_paranoia_check(port, tty->name, "rc_flush_chars")) | |
1170 | return; | |
1171 | ||
1172 | if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || | |
1173 | !port->xmit_buf) | |
1174 | return; | |
1175 | ||
1176 | save_flags(flags); cli(); | |
1177 | port->IER |= IER_TXRDY; | |
1178 | rc_out(port_Board(port), CD180_CAR, port_No(port)); | |
1179 | rc_out(port_Board(port), CD180_IER, port->IER); | |
1180 | restore_flags(flags); | |
1181 | } | |
1182 | ||
1183 | static int rc_write_room(struct tty_struct * tty) | |
1184 | { | |
1185 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1186 | int ret; | |
1187 | ||
1188 | if (rc_paranoia_check(port, tty->name, "rc_write_room")) | |
1189 | return 0; | |
1190 | ||
1191 | ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; | |
1192 | if (ret < 0) | |
1193 | ret = 0; | |
1194 | return ret; | |
1195 | } | |
1196 | ||
1197 | static int rc_chars_in_buffer(struct tty_struct *tty) | |
1198 | { | |
1199 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1200 | ||
1201 | if (rc_paranoia_check(port, tty->name, "rc_chars_in_buffer")) | |
1202 | return 0; | |
1203 | ||
1204 | return port->xmit_cnt; | |
1205 | } | |
1206 | ||
1207 | static void rc_flush_buffer(struct tty_struct *tty) | |
1208 | { | |
1209 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1210 | unsigned long flags; | |
1211 | ||
1212 | if (rc_paranoia_check(port, tty->name, "rc_flush_buffer")) | |
1213 | return; | |
1214 | ||
1215 | save_flags(flags); cli(); | |
1216 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; | |
1217 | restore_flags(flags); | |
1218 | ||
1da177e4 LT |
1219 | tty_wakeup(tty); |
1220 | } | |
1221 | ||
1222 | static int rc_tiocmget(struct tty_struct *tty, struct file *file) | |
1223 | { | |
1224 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1225 | struct riscom_board * bp; | |
1226 | unsigned char status; | |
1227 | unsigned int result; | |
1228 | unsigned long flags; | |
1229 | ||
1230 | if (rc_paranoia_check(port, tty->name, __FUNCTION__)) | |
1231 | return -ENODEV; | |
1232 | ||
1233 | bp = port_Board(port); | |
1234 | save_flags(flags); cli(); | |
1235 | rc_out(bp, CD180_CAR, port_No(port)); | |
1236 | status = rc_in(bp, CD180_MSVR); | |
1237 | result = rc_in(bp, RC_RI) & (1u << port_No(port)) ? 0 : TIOCM_RNG; | |
1238 | restore_flags(flags); | |
1239 | result |= ((status & MSVR_RTS) ? TIOCM_RTS : 0) | |
1240 | | ((status & MSVR_DTR) ? TIOCM_DTR : 0) | |
1241 | | ((status & MSVR_CD) ? TIOCM_CAR : 0) | |
1242 | | ((status & MSVR_DSR) ? TIOCM_DSR : 0) | |
1243 | | ((status & MSVR_CTS) ? TIOCM_CTS : 0); | |
1244 | return result; | |
1245 | } | |
1246 | ||
1247 | static int rc_tiocmset(struct tty_struct *tty, struct file *file, | |
1248 | unsigned int set, unsigned int clear) | |
1249 | { | |
1250 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1251 | unsigned long flags; | |
1252 | struct riscom_board *bp; | |
1253 | ||
1254 | if (rc_paranoia_check(port, tty->name, __FUNCTION__)) | |
1255 | return -ENODEV; | |
1256 | ||
1257 | bp = port_Board(port); | |
1258 | ||
1259 | save_flags(flags); cli(); | |
1260 | if (set & TIOCM_RTS) | |
1261 | port->MSVR |= MSVR_RTS; | |
1262 | if (set & TIOCM_DTR) | |
1263 | bp->DTR &= ~(1u << port_No(port)); | |
1264 | ||
1265 | if (clear & TIOCM_RTS) | |
1266 | port->MSVR &= ~MSVR_RTS; | |
1267 | if (clear & TIOCM_DTR) | |
1268 | bp->DTR |= (1u << port_No(port)); | |
1269 | ||
1270 | rc_out(bp, CD180_CAR, port_No(port)); | |
1271 | rc_out(bp, CD180_MSVR, port->MSVR); | |
1272 | rc_out(bp, RC_DTR, bp->DTR); | |
1273 | restore_flags(flags); | |
1274 | return 0; | |
1275 | } | |
1276 | ||
1277 | static inline void rc_send_break(struct riscom_port * port, unsigned long length) | |
1278 | { | |
1279 | struct riscom_board *bp = port_Board(port); | |
1280 | unsigned long flags; | |
1281 | ||
1282 | save_flags(flags); cli(); | |
1283 | port->break_length = RISCOM_TPS / HZ * length; | |
1284 | port->COR2 |= COR2_ETC; | |
1285 | port->IER |= IER_TXRDY; | |
1286 | rc_out(bp, CD180_CAR, port_No(port)); | |
1287 | rc_out(bp, CD180_COR2, port->COR2); | |
1288 | rc_out(bp, CD180_IER, port->IER); | |
1289 | rc_wait_CCR(bp); | |
1290 | rc_out(bp, CD180_CCR, CCR_CORCHG2); | |
1291 | rc_wait_CCR(bp); | |
1292 | restore_flags(flags); | |
1293 | } | |
1294 | ||
1295 | static inline int rc_set_serial_info(struct riscom_port * port, | |
1296 | struct serial_struct __user * newinfo) | |
1297 | { | |
1298 | struct serial_struct tmp; | |
1299 | struct riscom_board *bp = port_Board(port); | |
1300 | int change_speed; | |
1301 | unsigned long flags; | |
1302 | ||
1303 | if (copy_from_user(&tmp, newinfo, sizeof(tmp))) | |
1304 | return -EFAULT; | |
1305 | ||
1306 | #if 0 | |
1307 | if ((tmp.irq != bp->irq) || | |
1308 | (tmp.port != bp->base) || | |
1309 | (tmp.type != PORT_CIRRUS) || | |
1310 | (tmp.baud_base != (RC_OSCFREQ + CD180_TPC/2) / CD180_TPC) || | |
1311 | (tmp.custom_divisor != 0) || | |
1312 | (tmp.xmit_fifo_size != CD180_NFIFO) || | |
1313 | (tmp.flags & ~RISCOM_LEGAL_FLAGS)) | |
1314 | return -EINVAL; | |
1315 | #endif | |
1316 | ||
1317 | change_speed = ((port->flags & ASYNC_SPD_MASK) != | |
1318 | (tmp.flags & ASYNC_SPD_MASK)); | |
1319 | ||
1320 | if (!capable(CAP_SYS_ADMIN)) { | |
1321 | if ((tmp.close_delay != port->close_delay) || | |
1322 | (tmp.closing_wait != port->closing_wait) || | |
1323 | ((tmp.flags & ~ASYNC_USR_MASK) != | |
1324 | (port->flags & ~ASYNC_USR_MASK))) | |
1325 | return -EPERM; | |
1326 | port->flags = ((port->flags & ~ASYNC_USR_MASK) | | |
1327 | (tmp.flags & ASYNC_USR_MASK)); | |
1328 | } else { | |
1329 | port->flags = ((port->flags & ~ASYNC_FLAGS) | | |
1330 | (tmp.flags & ASYNC_FLAGS)); | |
1331 | port->close_delay = tmp.close_delay; | |
1332 | port->closing_wait = tmp.closing_wait; | |
1333 | } | |
1334 | if (change_speed) { | |
1335 | save_flags(flags); cli(); | |
1336 | rc_change_speed(bp, port); | |
1337 | restore_flags(flags); | |
1338 | } | |
1339 | return 0; | |
1340 | } | |
1341 | ||
1342 | static inline int rc_get_serial_info(struct riscom_port * port, | |
1343 | struct serial_struct __user *retinfo) | |
1344 | { | |
1345 | struct serial_struct tmp; | |
1346 | struct riscom_board *bp = port_Board(port); | |
1347 | ||
1348 | memset(&tmp, 0, sizeof(tmp)); | |
1349 | tmp.type = PORT_CIRRUS; | |
1350 | tmp.line = port - rc_port; | |
1351 | tmp.port = bp->base; | |
1352 | tmp.irq = bp->irq; | |
1353 | tmp.flags = port->flags; | |
1354 | tmp.baud_base = (RC_OSCFREQ + CD180_TPC/2) / CD180_TPC; | |
1355 | tmp.close_delay = port->close_delay * HZ/100; | |
1356 | tmp.closing_wait = port->closing_wait * HZ/100; | |
1357 | tmp.xmit_fifo_size = CD180_NFIFO; | |
1358 | return copy_to_user(retinfo, &tmp, sizeof(tmp)) ? -EFAULT : 0; | |
1359 | } | |
1360 | ||
1361 | static int rc_ioctl(struct tty_struct * tty, struct file * filp, | |
1362 | unsigned int cmd, unsigned long arg) | |
1363 | ||
1364 | { | |
1365 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1366 | void __user *argp = (void __user *)arg; | |
1367 | int retval; | |
1368 | ||
1369 | if (rc_paranoia_check(port, tty->name, "rc_ioctl")) | |
1370 | return -ENODEV; | |
1371 | ||
1372 | switch (cmd) { | |
1373 | case TCSBRK: /* SVID version: non-zero arg --> no break */ | |
1374 | retval = tty_check_change(tty); | |
1375 | if (retval) | |
1376 | return retval; | |
1377 | tty_wait_until_sent(tty, 0); | |
1378 | if (!arg) | |
1379 | rc_send_break(port, HZ/4); /* 1/4 second */ | |
1380 | break; | |
1381 | case TCSBRKP: /* support for POSIX tcsendbreak() */ | |
1382 | retval = tty_check_change(tty); | |
1383 | if (retval) | |
1384 | return retval; | |
1385 | tty_wait_until_sent(tty, 0); | |
1386 | rc_send_break(port, arg ? arg*(HZ/10) : HZ/4); | |
1387 | break; | |
1388 | case TIOCGSOFTCAR: | |
1389 | return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned __user *)argp); | |
1390 | case TIOCSSOFTCAR: | |
1391 | if (get_user(arg,(unsigned __user *) argp)) | |
1392 | return -EFAULT; | |
1393 | tty->termios->c_cflag = | |
1394 | ((tty->termios->c_cflag & ~CLOCAL) | | |
1395 | (arg ? CLOCAL : 0)); | |
1396 | break; | |
1397 | case TIOCGSERIAL: | |
1398 | return rc_get_serial_info(port, argp); | |
1399 | case TIOCSSERIAL: | |
1400 | return rc_set_serial_info(port, argp); | |
1401 | default: | |
1402 | return -ENOIOCTLCMD; | |
1403 | } | |
1404 | return 0; | |
1405 | } | |
1406 | ||
1407 | static void rc_throttle(struct tty_struct * tty) | |
1408 | { | |
1409 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1410 | struct riscom_board *bp; | |
1411 | unsigned long flags; | |
1412 | ||
1413 | if (rc_paranoia_check(port, tty->name, "rc_throttle")) | |
1414 | return; | |
1415 | ||
1416 | bp = port_Board(port); | |
1417 | ||
1418 | save_flags(flags); cli(); | |
1419 | port->MSVR &= ~MSVR_RTS; | |
1420 | rc_out(bp, CD180_CAR, port_No(port)); | |
1421 | if (I_IXOFF(tty)) { | |
1422 | rc_wait_CCR(bp); | |
1423 | rc_out(bp, CD180_CCR, CCR_SSCH2); | |
1424 | rc_wait_CCR(bp); | |
1425 | } | |
1426 | rc_out(bp, CD180_MSVR, port->MSVR); | |
1427 | restore_flags(flags); | |
1428 | } | |
1429 | ||
1430 | static void rc_unthrottle(struct tty_struct * tty) | |
1431 | { | |
1432 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1433 | struct riscom_board *bp; | |
1434 | unsigned long flags; | |
1435 | ||
1436 | if (rc_paranoia_check(port, tty->name, "rc_unthrottle")) | |
1437 | return; | |
1438 | ||
1439 | bp = port_Board(port); | |
1440 | ||
1441 | save_flags(flags); cli(); | |
1442 | port->MSVR |= MSVR_RTS; | |
1443 | rc_out(bp, CD180_CAR, port_No(port)); | |
1444 | if (I_IXOFF(tty)) { | |
1445 | rc_wait_CCR(bp); | |
1446 | rc_out(bp, CD180_CCR, CCR_SSCH1); | |
1447 | rc_wait_CCR(bp); | |
1448 | } | |
1449 | rc_out(bp, CD180_MSVR, port->MSVR); | |
1450 | restore_flags(flags); | |
1451 | } | |
1452 | ||
1453 | static void rc_stop(struct tty_struct * tty) | |
1454 | { | |
1455 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1456 | struct riscom_board *bp; | |
1457 | unsigned long flags; | |
1458 | ||
1459 | if (rc_paranoia_check(port, tty->name, "rc_stop")) | |
1460 | return; | |
1461 | ||
1462 | bp = port_Board(port); | |
1463 | ||
1464 | save_flags(flags); cli(); | |
1465 | port->IER &= ~IER_TXRDY; | |
1466 | rc_out(bp, CD180_CAR, port_No(port)); | |
1467 | rc_out(bp, CD180_IER, port->IER); | |
1468 | restore_flags(flags); | |
1469 | } | |
1470 | ||
1471 | static void rc_start(struct tty_struct * tty) | |
1472 | { | |
1473 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1474 | struct riscom_board *bp; | |
1475 | unsigned long flags; | |
1476 | ||
1477 | if (rc_paranoia_check(port, tty->name, "rc_start")) | |
1478 | return; | |
1479 | ||
1480 | bp = port_Board(port); | |
1481 | ||
1482 | save_flags(flags); cli(); | |
1483 | if (port->xmit_cnt && port->xmit_buf && !(port->IER & IER_TXRDY)) { | |
1484 | port->IER |= IER_TXRDY; | |
1485 | rc_out(bp, CD180_CAR, port_No(port)); | |
1486 | rc_out(bp, CD180_IER, port->IER); | |
1487 | } | |
1488 | restore_flags(flags); | |
1489 | } | |
1490 | ||
1491 | /* | |
1492 | * This routine is called from the work queue when the interrupt | |
1493 | * routine has signalled that a hangup has occurred. The path of | |
1494 | * hangup processing is: | |
1495 | * | |
1496 | * serial interrupt routine -> (workqueue) -> | |
1497 | * do_rc_hangup() -> tty->hangup() -> rc_hangup() | |
1498 | * | |
1499 | */ | |
3e577a80 | 1500 | static void do_rc_hangup(struct work_struct *ugly_api) |
1da177e4 | 1501 | { |
3e577a80 | 1502 | struct riscom_port *port = container_of(ugly_api, struct riscom_port, tqueue_hangup); |
1da177e4 LT |
1503 | struct tty_struct *tty; |
1504 | ||
1505 | tty = port->tty; | |
1506 | if (tty) | |
1507 | tty_hangup(tty); /* FIXME: module removal race still here */ | |
1508 | } | |
1509 | ||
1510 | static void rc_hangup(struct tty_struct * tty) | |
1511 | { | |
1512 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1513 | struct riscom_board *bp; | |
1514 | ||
1515 | if (rc_paranoia_check(port, tty->name, "rc_hangup")) | |
1516 | return; | |
1517 | ||
1518 | bp = port_Board(port); | |
1519 | ||
1520 | rc_shutdown_port(bp, port); | |
1521 | port->event = 0; | |
1522 | port->count = 0; | |
1523 | port->flags &= ~ASYNC_NORMAL_ACTIVE; | |
1524 | port->tty = NULL; | |
1525 | wake_up_interruptible(&port->open_wait); | |
1526 | } | |
1527 | ||
606d099c | 1528 | static void rc_set_termios(struct tty_struct * tty, struct ktermios * old_termios) |
1da177e4 LT |
1529 | { |
1530 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1531 | unsigned long flags; | |
1532 | ||
1533 | if (rc_paranoia_check(port, tty->name, "rc_set_termios")) | |
1534 | return; | |
1535 | ||
1536 | if (tty->termios->c_cflag == old_termios->c_cflag && | |
1537 | tty->termios->c_iflag == old_termios->c_iflag) | |
1538 | return; | |
1539 | ||
1540 | save_flags(flags); cli(); | |
1541 | rc_change_speed(port_Board(port), port); | |
1542 | restore_flags(flags); | |
1543 | ||
1544 | if ((old_termios->c_cflag & CRTSCTS) && | |
1545 | !(tty->termios->c_cflag & CRTSCTS)) { | |
1546 | tty->hw_stopped = 0; | |
1547 | rc_start(tty); | |
1548 | } | |
1549 | } | |
1550 | ||
3e577a80 | 1551 | static void do_softint(struct work_struct *ugly_api) |
1da177e4 | 1552 | { |
3e577a80 | 1553 | struct riscom_port *port = container_of(ugly_api, struct riscom_port, tqueue); |
1da177e4 LT |
1554 | struct tty_struct *tty; |
1555 | ||
1556 | if(!(tty = port->tty)) | |
1557 | return; | |
1558 | ||
b963a844 | 1559 | if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &port->event)) |
1da177e4 | 1560 | tty_wakeup(tty); |
1da177e4 LT |
1561 | } |
1562 | ||
b68e31d0 | 1563 | static const struct tty_operations riscom_ops = { |
1da177e4 LT |
1564 | .open = rc_open, |
1565 | .close = rc_close, | |
1566 | .write = rc_write, | |
1567 | .put_char = rc_put_char, | |
1568 | .flush_chars = rc_flush_chars, | |
1569 | .write_room = rc_write_room, | |
1570 | .chars_in_buffer = rc_chars_in_buffer, | |
1571 | .flush_buffer = rc_flush_buffer, | |
1572 | .ioctl = rc_ioctl, | |
1573 | .throttle = rc_throttle, | |
1574 | .unthrottle = rc_unthrottle, | |
1575 | .set_termios = rc_set_termios, | |
1576 | .stop = rc_stop, | |
1577 | .start = rc_start, | |
1578 | .hangup = rc_hangup, | |
1579 | .tiocmget = rc_tiocmget, | |
1580 | .tiocmset = rc_tiocmset, | |
1581 | }; | |
1582 | ||
1583 | static inline int rc_init_drivers(void) | |
1584 | { | |
1585 | int error; | |
1586 | int i; | |
1587 | ||
1588 | riscom_driver = alloc_tty_driver(RC_NBOARD * RC_NPORT); | |
1589 | if (!riscom_driver) | |
1590 | return -ENOMEM; | |
1591 | ||
1da177e4 LT |
1592 | riscom_driver->owner = THIS_MODULE; |
1593 | riscom_driver->name = "ttyL"; | |
1da177e4 LT |
1594 | riscom_driver->major = RISCOM8_NORMAL_MAJOR; |
1595 | riscom_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1596 | riscom_driver->subtype = SERIAL_TYPE_NORMAL; | |
1597 | riscom_driver->init_termios = tty_std_termios; | |
1598 | riscom_driver->init_termios.c_cflag = | |
1599 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
606d099c AC |
1600 | riscom_driver->init_termios.c_ispeed = 9600; |
1601 | riscom_driver->init_termios.c_ospeed = 9600; | |
1da177e4 LT |
1602 | riscom_driver->flags = TTY_DRIVER_REAL_RAW; |
1603 | tty_set_operations(riscom_driver, &riscom_ops); | |
1604 | if ((error = tty_register_driver(riscom_driver))) { | |
1da177e4 LT |
1605 | put_tty_driver(riscom_driver); |
1606 | printk(KERN_ERR "rc: Couldn't register RISCom/8 driver, " | |
1607 | "error = %d\n", | |
1608 | error); | |
1609 | return 1; | |
1610 | } | |
1611 | ||
1612 | memset(rc_port, 0, sizeof(rc_port)); | |
1613 | for (i = 0; i < RC_NPORT * RC_NBOARD; i++) { | |
1614 | rc_port[i].magic = RISCOM8_MAGIC; | |
3e577a80 AV |
1615 | INIT_WORK(&rc_port[i].tqueue, do_softint); |
1616 | INIT_WORK(&rc_port[i].tqueue_hangup, do_rc_hangup); | |
1da177e4 LT |
1617 | rc_port[i].close_delay = 50 * HZ/100; |
1618 | rc_port[i].closing_wait = 3000 * HZ/100; | |
1619 | init_waitqueue_head(&rc_port[i].open_wait); | |
1620 | init_waitqueue_head(&rc_port[i].close_wait); | |
1621 | } | |
1622 | ||
1623 | return 0; | |
1624 | } | |
1625 | ||
1626 | static void rc_release_drivers(void) | |
1627 | { | |
1628 | unsigned long flags; | |
1629 | ||
1630 | save_flags(flags); | |
1631 | cli(); | |
1da177e4 LT |
1632 | tty_unregister_driver(riscom_driver); |
1633 | put_tty_driver(riscom_driver); | |
1634 | restore_flags(flags); | |
1635 | } | |
1636 | ||
1637 | #ifndef MODULE | |
1638 | /* | |
1639 | * Called at boot time. | |
1640 | * | |
1641 | * You can specify IO base for up to RC_NBOARD cards, | |
1642 | * using line "riscom8=0xiobase1,0xiobase2,.." at LILO prompt. | |
1643 | * Note that there will be no probing at default | |
1644 | * addresses in this case. | |
1645 | * | |
1646 | */ | |
1647 | static int __init riscom8_setup(char *str) | |
1648 | { | |
1649 | int ints[RC_NBOARD]; | |
1650 | int i; | |
1651 | ||
1652 | str = get_options(str, ARRAY_SIZE(ints), ints); | |
1653 | ||
1654 | for (i = 0; i < RC_NBOARD; i++) { | |
1655 | if (i < ints[0]) | |
1656 | rc_board[i].base = ints[i+1]; | |
1657 | else | |
1658 | rc_board[i].base = 0; | |
1659 | } | |
1660 | return 1; | |
1661 | } | |
1662 | ||
1663 | __setup("riscom8=", riscom8_setup); | |
1664 | #endif | |
1665 | ||
1666 | static char banner[] __initdata = | |
1667 | KERN_INFO "rc: SDL RISCom/8 card driver v1.1, (c) D.Gorodchanin " | |
1668 | "1994-1996.\n"; | |
1669 | static char no_boards_msg[] __initdata = | |
1670 | KERN_INFO "rc: No RISCom/8 boards detected.\n"; | |
1671 | ||
1672 | /* | |
1673 | * This routine must be called by kernel at boot time | |
1674 | */ | |
1675 | static int __init riscom8_init(void) | |
1676 | { | |
1677 | int i; | |
1678 | int found = 0; | |
1679 | ||
1680 | printk(banner); | |
1681 | ||
1682 | if (rc_init_drivers()) | |
1683 | return -EIO; | |
1684 | ||
1685 | for (i = 0; i < RC_NBOARD; i++) | |
1686 | if (rc_board[i].base && !rc_probe(&rc_board[i])) | |
1687 | found++; | |
1688 | ||
1689 | if (!found) { | |
1690 | rc_release_drivers(); | |
1691 | printk(no_boards_msg); | |
1692 | return -EIO; | |
1693 | } | |
1694 | return 0; | |
1695 | } | |
1696 | ||
1697 | #ifdef MODULE | |
1698 | static int iobase; | |
1699 | static int iobase1; | |
1700 | static int iobase2; | |
1701 | static int iobase3; | |
8d3b33f6 RR |
1702 | module_param(iobase, int, 0); |
1703 | module_param(iobase1, int, 0); | |
1704 | module_param(iobase2, int, 0); | |
1705 | module_param(iobase3, int, 0); | |
1da177e4 LT |
1706 | |
1707 | MODULE_LICENSE("GPL"); | |
1708 | #endif /* MODULE */ | |
1709 | ||
1710 | /* | |
1711 | * You can setup up to 4 boards (current value of RC_NBOARD) | |
1712 | * by specifying "iobase=0xXXX iobase1=0xXXX ..." as insmod parameter. | |
1713 | * | |
1714 | */ | |
1715 | static int __init riscom8_init_module (void) | |
1716 | { | |
1717 | #ifdef MODULE | |
1718 | int i; | |
1719 | ||
1720 | if (iobase || iobase1 || iobase2 || iobase3) { | |
1721 | for(i = 0; i < RC_NBOARD; i++) | |
1722 | rc_board[0].base = 0; | |
1723 | } | |
1724 | ||
1725 | if (iobase) | |
1726 | rc_board[0].base = iobase; | |
1727 | if (iobase1) | |
1728 | rc_board[1].base = iobase1; | |
1729 | if (iobase2) | |
1730 | rc_board[2].base = iobase2; | |
1731 | if (iobase3) | |
1732 | rc_board[3].base = iobase3; | |
1733 | #endif /* MODULE */ | |
1734 | ||
1735 | return riscom8_init(); | |
1736 | } | |
1737 | ||
1738 | static void __exit riscom8_exit_module (void) | |
1739 | { | |
1740 | int i; | |
1741 | ||
1742 | rc_release_drivers(); | |
1743 | for (i = 0; i < RC_NBOARD; i++) | |
1744 | if (rc_board[i].flags & RC_BOARD_PRESENT) | |
1745 | rc_release_io_range(&rc_board[i]); | |
1746 | ||
1747 | } | |
1748 | ||
1749 | module_init(riscom8_init_module); | |
1750 | module_exit(riscom8_exit_module); | |
1751 |