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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> | |
49 | ||
50 | #include <asm/uaccess.h> | |
51 | ||
52 | #include "riscom8.h" | |
53 | #include "riscom8_reg.h" | |
54 | ||
55 | /* Am I paranoid or not ? ;-) */ | |
56 | #define RISCOM_PARANOIA_CHECK | |
57 | ||
58 | /* | |
59 | * Crazy InteliCom/8 boards sometimes has swapped CTS & DSR signals. | |
60 | * You can slightly speed up things by #undefing the following option, | |
61 | * if you are REALLY sure that your board is correct one. | |
62 | */ | |
63 | ||
64 | #define RISCOM_BRAIN_DAMAGED_CTS | |
65 | ||
66 | /* | |
67 | * The following defines are mostly for testing purposes. But if you need | |
68 | * some nice reporting in your syslog, you can define them also. | |
69 | */ | |
70 | #undef RC_REPORT_FIFO | |
71 | #undef RC_REPORT_OVERRUN | |
72 | ||
73 | ||
74 | #define RISCOM_LEGAL_FLAGS \ | |
75 | (ASYNC_HUP_NOTIFY | ASYNC_SAK | ASYNC_SPLIT_TERMIOS | \ | |
76 | ASYNC_SPD_HI | ASYNC_SPEED_VHI | ASYNC_SESSION_LOCKOUT | \ | |
77 | ASYNC_PGRP_LOCKOUT | ASYNC_CALLOUT_NOHUP) | |
78 | ||
79 | #define RS_EVENT_WRITE_WAKEUP 0 | |
80 | ||
81 | static struct riscom_board * IRQ_to_board[16]; | |
82 | static struct tty_driver *riscom_driver; | |
83 | static unsigned char * tmp_buf; | |
84 | static DECLARE_MUTEX(tmp_buf_sem); | |
85 | ||
86 | static unsigned long baud_table[] = { | |
87 | 0, 50, 75, 110, 134, 150, 200, 300, 600, 1200, 1800, 2400, 4800, | |
88 | 9600, 19200, 38400, 57600, 76800, 0, | |
89 | }; | |
90 | ||
91 | static struct riscom_board rc_board[RC_NBOARD] = { | |
92 | { | |
93 | .base = RC_IOBASE1, | |
94 | }, | |
95 | { | |
96 | .base = RC_IOBASE2, | |
97 | }, | |
98 | { | |
99 | .base = RC_IOBASE3, | |
100 | }, | |
101 | { | |
102 | .base = RC_IOBASE4, | |
103 | }, | |
104 | }; | |
105 | ||
106 | static struct riscom_port rc_port[RC_NBOARD * RC_NPORT]; | |
107 | ||
108 | /* RISCom/8 I/O ports addresses (without address translation) */ | |
109 | static unsigned short rc_ioport[] = { | |
110 | #if 1 | |
111 | 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x09, 0x0a, 0x0b, 0x0c, | |
112 | #else | |
113 | 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x09, 0x0a, 0x0b, 0x0c, 0x10, | |
114 | 0x11, 0x12, 0x18, 0x28, 0x31, 0x32, 0x39, 0x3a, 0x40, 0x41, 0x61, 0x62, | |
115 | 0x63, 0x64, 0x6b, 0x70, 0x71, 0x78, 0x7a, 0x7b, 0x7f, 0x100, 0x101 | |
116 | #endif | |
117 | }; | |
118 | #define RC_NIOPORT (sizeof(rc_ioport) / sizeof(rc_ioport[0])) | |
119 | ||
120 | ||
121 | static inline int rc_paranoia_check(struct riscom_port const * port, | |
122 | char *name, const char *routine) | |
123 | { | |
124 | #ifdef RISCOM_PARANOIA_CHECK | |
125 | static const char badmagic[] = KERN_INFO | |
126 | "rc: Warning: bad riscom port magic number for device %s in %s\n"; | |
127 | static const char badinfo[] = KERN_INFO | |
128 | "rc: Warning: null riscom port for device %s in %s\n"; | |
129 | ||
130 | if (!port) { | |
131 | printk(badinfo, name, routine); | |
132 | return 1; | |
133 | } | |
134 | if (port->magic != RISCOM8_MAGIC) { | |
135 | printk(badmagic, name, routine); | |
136 | return 1; | |
137 | } | |
138 | #endif | |
139 | return 0; | |
140 | } | |
141 | ||
142 | /* | |
143 | * | |
144 | * Service functions for RISCom/8 driver. | |
145 | * | |
146 | */ | |
147 | ||
148 | /* Get board number from pointer */ | |
149 | static inline int board_No (struct riscom_board const * bp) | |
150 | { | |
151 | return bp - rc_board; | |
152 | } | |
153 | ||
154 | /* Get port number from pointer */ | |
155 | static inline int port_No (struct riscom_port const * port) | |
156 | { | |
157 | return RC_PORT(port - rc_port); | |
158 | } | |
159 | ||
160 | /* Get pointer to board from pointer to port */ | |
161 | static inline struct riscom_board * port_Board(struct riscom_port const * port) | |
162 | { | |
163 | return &rc_board[RC_BOARD(port - rc_port)]; | |
164 | } | |
165 | ||
166 | /* Input Byte from CL CD180 register */ | |
167 | static inline unsigned char rc_in(struct riscom_board const * bp, unsigned short reg) | |
168 | { | |
169 | return inb(bp->base + RC_TO_ISA(reg)); | |
170 | } | |
171 | ||
172 | /* Output Byte to CL CD180 register */ | |
173 | static inline void rc_out(struct riscom_board const * bp, unsigned short reg, | |
174 | unsigned char val) | |
175 | { | |
176 | outb(val, bp->base + RC_TO_ISA(reg)); | |
177 | } | |
178 | ||
179 | /* Wait for Channel Command Register ready */ | |
180 | static inline void rc_wait_CCR(struct riscom_board const * bp) | |
181 | { | |
182 | unsigned long delay; | |
183 | ||
184 | /* FIXME: need something more descriptive then 100000 :) */ | |
185 | for (delay = 100000; delay; delay--) | |
186 | if (!rc_in(bp, CD180_CCR)) | |
187 | return; | |
188 | ||
189 | printk(KERN_INFO "rc%d: Timeout waiting for CCR.\n", board_No(bp)); | |
190 | } | |
191 | ||
192 | /* | |
193 | * RISCom/8 probe functions. | |
194 | */ | |
195 | ||
196 | static inline int rc_request_io_range(struct riscom_board * const bp) | |
197 | { | |
198 | int i; | |
199 | ||
200 | for (i = 0; i < RC_NIOPORT; i++) | |
201 | if (!request_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1, | |
202 | "RISCom/8")) { | |
203 | goto out_release; | |
204 | } | |
205 | return 0; | |
206 | out_release: | |
207 | printk(KERN_INFO "rc%d: Skipping probe at 0x%03x. IO address in use.\n", | |
208 | board_No(bp), bp->base); | |
209 | while(--i >= 0) | |
210 | release_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1); | |
211 | return 1; | |
212 | } | |
213 | ||
214 | static inline void rc_release_io_range(struct riscom_board * const bp) | |
215 | { | |
216 | int i; | |
217 | ||
218 | for (i = 0; i < RC_NIOPORT; i++) | |
219 | release_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1); | |
220 | } | |
221 | ||
222 | /* Must be called with enabled interrupts */ | |
223 | static inline void rc_long_delay(unsigned long delay) | |
224 | { | |
225 | unsigned long i; | |
226 | ||
227 | for (i = jiffies + delay; time_after(i,jiffies); ) ; | |
228 | } | |
229 | ||
230 | /* Reset and setup CD180 chip */ | |
231 | static void __init rc_init_CD180(struct riscom_board const * bp) | |
232 | { | |
233 | unsigned long flags; | |
234 | ||
235 | save_flags(flags); cli(); | |
236 | rc_out(bp, RC_CTOUT, 0); /* Clear timeout */ | |
237 | rc_wait_CCR(bp); /* Wait for CCR ready */ | |
238 | rc_out(bp, CD180_CCR, CCR_HARDRESET); /* Reset CD180 chip */ | |
239 | sti(); | |
240 | rc_long_delay(HZ/20); /* Delay 0.05 sec */ | |
241 | cli(); | |
242 | rc_out(bp, CD180_GIVR, RC_ID); /* Set ID for this chip */ | |
243 | rc_out(bp, CD180_GICR, 0); /* Clear all bits */ | |
244 | rc_out(bp, CD180_PILR1, RC_ACK_MINT); /* Prio for modem intr */ | |
245 | rc_out(bp, CD180_PILR2, RC_ACK_TINT); /* Prio for transmitter intr */ | |
246 | rc_out(bp, CD180_PILR3, RC_ACK_RINT); /* Prio for receiver intr */ | |
247 | ||
248 | /* Setting up prescaler. We need 4 ticks per 1 ms */ | |
249 | rc_out(bp, CD180_PPRH, (RC_OSCFREQ/(1000000/RISCOM_TPS)) >> 8); | |
250 | rc_out(bp, CD180_PPRL, (RC_OSCFREQ/(1000000/RISCOM_TPS)) & 0xff); | |
251 | ||
252 | restore_flags(flags); | |
253 | } | |
254 | ||
255 | /* Main probing routine, also sets irq. */ | |
256 | static int __init rc_probe(struct riscom_board *bp) | |
257 | { | |
258 | unsigned char val1, val2; | |
259 | int irqs = 0; | |
260 | int retries; | |
261 | ||
262 | bp->irq = 0; | |
263 | ||
264 | if (rc_request_io_range(bp)) | |
265 | return 1; | |
266 | ||
267 | /* Are the I/O ports here ? */ | |
268 | rc_out(bp, CD180_PPRL, 0x5a); | |
269 | outb(0xff, 0x80); | |
270 | val1 = rc_in(bp, CD180_PPRL); | |
271 | rc_out(bp, CD180_PPRL, 0xa5); | |
272 | outb(0x00, 0x80); | |
273 | val2 = rc_in(bp, CD180_PPRL); | |
274 | ||
275 | if ((val1 != 0x5a) || (val2 != 0xa5)) { | |
276 | printk(KERN_ERR "rc%d: RISCom/8 Board at 0x%03x not found.\n", | |
277 | board_No(bp), bp->base); | |
278 | goto out_release; | |
279 | } | |
280 | ||
281 | /* It's time to find IRQ for this board */ | |
282 | for (retries = 0; retries < 5 && irqs <= 0; retries++) { | |
283 | irqs = probe_irq_on(); | |
284 | rc_init_CD180(bp); /* Reset CD180 chip */ | |
285 | rc_out(bp, CD180_CAR, 2); /* Select port 2 */ | |
286 | rc_wait_CCR(bp); | |
287 | rc_out(bp, CD180_CCR, CCR_TXEN); /* Enable transmitter */ | |
288 | rc_out(bp, CD180_IER, IER_TXRDY); /* Enable tx empty intr */ | |
289 | rc_long_delay(HZ/20); | |
290 | irqs = probe_irq_off(irqs); | |
291 | val1 = rc_in(bp, RC_BSR); /* Get Board Status reg */ | |
292 | val2 = rc_in(bp, RC_ACK_TINT); /* ACK interrupt */ | |
293 | rc_init_CD180(bp); /* Reset CD180 again */ | |
294 | ||
295 | if ((val1 & RC_BSR_TINT) || (val2 != (RC_ID | GIVR_IT_TX))) { | |
296 | printk(KERN_ERR "rc%d: RISCom/8 Board at 0x%03x not " | |
297 | "found.\n", board_No(bp), bp->base); | |
298 | goto out_release; | |
299 | } | |
300 | } | |
301 | ||
302 | if (irqs <= 0) { | |
303 | printk(KERN_ERR "rc%d: Can't find IRQ for RISCom/8 board " | |
304 | "at 0x%03x.\n", board_No(bp), bp->base); | |
305 | goto out_release; | |
306 | } | |
307 | bp->irq = irqs; | |
308 | bp->flags |= RC_BOARD_PRESENT; | |
309 | ||
310 | printk(KERN_INFO "rc%d: RISCom/8 Rev. %c board detected at " | |
311 | "0x%03x, IRQ %d.\n", | |
312 | board_No(bp), | |
313 | (rc_in(bp, CD180_GFRCR) & 0x0f) + 'A', /* Board revision */ | |
314 | bp->base, bp->irq); | |
315 | ||
316 | return 0; | |
317 | out_release: | |
318 | rc_release_io_range(bp); | |
319 | return 1; | |
320 | } | |
321 | ||
322 | /* | |
323 | * | |
324 | * Interrupt processing routines. | |
325 | * | |
326 | */ | |
327 | ||
328 | static inline void rc_mark_event(struct riscom_port * port, int event) | |
329 | { | |
330 | set_bit(event, &port->event); | |
331 | schedule_work(&port->tqueue); | |
332 | } | |
333 | ||
334 | static inline struct riscom_port * rc_get_port(struct riscom_board const * bp, | |
335 | unsigned char const * what) | |
336 | { | |
337 | unsigned char channel; | |
338 | struct riscom_port * port; | |
339 | ||
340 | channel = rc_in(bp, CD180_GICR) >> GICR_CHAN_OFF; | |
341 | if (channel < CD180_NCH) { | |
342 | port = &rc_port[board_No(bp) * RC_NPORT + channel]; | |
343 | if (port->flags & ASYNC_INITIALIZED) { | |
344 | return port; | |
345 | } | |
346 | } | |
347 | printk(KERN_ERR "rc%d: %s interrupt from invalid port %d\n", | |
348 | board_No(bp), what, channel); | |
349 | return NULL; | |
350 | } | |
351 | ||
352 | static inline void rc_receive_exc(struct riscom_board const * bp) | |
353 | { | |
354 | struct riscom_port *port; | |
355 | struct tty_struct *tty; | |
356 | unsigned char status; | |
357 | unsigned char ch; | |
358 | ||
359 | if (!(port = rc_get_port(bp, "Receive"))) | |
360 | return; | |
361 | ||
362 | tty = port->tty; | |
363 | if (tty->flip.count >= TTY_FLIPBUF_SIZE) { | |
364 | printk(KERN_WARNING "rc%d: port %d: Working around flip " | |
365 | "buffer overflow.\n", | |
366 | board_No(bp), port_No(port)); | |
367 | return; | |
368 | } | |
369 | ||
370 | #ifdef RC_REPORT_OVERRUN | |
371 | status = rc_in(bp, CD180_RCSR); | |
372 | if (status & RCSR_OE) { | |
373 | port->overrun++; | |
374 | #if 0 | |
375 | printk(KERN_ERR "rc%d: port %d: Overrun. Total %ld overruns\n", | |
376 | board_No(bp), port_No(port), port->overrun); | |
377 | #endif | |
378 | } | |
379 | status &= port->mark_mask; | |
380 | #else | |
381 | status = rc_in(bp, CD180_RCSR) & port->mark_mask; | |
382 | #endif | |
383 | ch = rc_in(bp, CD180_RDR); | |
384 | if (!status) { | |
385 | return; | |
386 | } | |
387 | if (status & RCSR_TOUT) { | |
388 | printk(KERN_WARNING "rc%d: port %d: Receiver timeout. " | |
389 | "Hardware problems ?\n", | |
390 | board_No(bp), port_No(port)); | |
391 | return; | |
392 | ||
393 | } else if (status & RCSR_BREAK) { | |
394 | printk(KERN_INFO "rc%d: port %d: Handling break...\n", | |
395 | board_No(bp), port_No(port)); | |
396 | *tty->flip.flag_buf_ptr++ = TTY_BREAK; | |
397 | if (port->flags & ASYNC_SAK) | |
398 | do_SAK(tty); | |
399 | ||
400 | } else if (status & RCSR_PE) | |
401 | *tty->flip.flag_buf_ptr++ = TTY_PARITY; | |
402 | ||
403 | else if (status & RCSR_FE) | |
404 | *tty->flip.flag_buf_ptr++ = TTY_FRAME; | |
405 | ||
406 | else if (status & RCSR_OE) | |
407 | *tty->flip.flag_buf_ptr++ = TTY_OVERRUN; | |
408 | ||
409 | else | |
410 | *tty->flip.flag_buf_ptr++ = 0; | |
411 | ||
412 | *tty->flip.char_buf_ptr++ = ch; | |
413 | tty->flip.count++; | |
414 | schedule_delayed_work(&tty->flip.work, 1); | |
415 | } | |
416 | ||
417 | static inline void rc_receive(struct riscom_board const * bp) | |
418 | { | |
419 | struct riscom_port *port; | |
420 | struct tty_struct *tty; | |
421 | unsigned char count; | |
422 | ||
423 | if (!(port = rc_get_port(bp, "Receive"))) | |
424 | return; | |
425 | ||
426 | tty = port->tty; | |
427 | ||
428 | count = rc_in(bp, CD180_RDCR); | |
429 | ||
430 | #ifdef RC_REPORT_FIFO | |
431 | port->hits[count > 8 ? 9 : count]++; | |
432 | #endif | |
433 | ||
434 | while (count--) { | |
435 | if (tty->flip.count >= TTY_FLIPBUF_SIZE) { | |
436 | printk(KERN_WARNING "rc%d: port %d: Working around " | |
437 | "flip buffer overflow.\n", | |
438 | board_No(bp), port_No(port)); | |
439 | break; | |
440 | } | |
441 | *tty->flip.char_buf_ptr++ = rc_in(bp, CD180_RDR); | |
442 | *tty->flip.flag_buf_ptr++ = 0; | |
443 | tty->flip.count++; | |
444 | } | |
445 | schedule_delayed_work(&tty->flip.work, 1); | |
446 | } | |
447 | ||
448 | static inline void rc_transmit(struct riscom_board const * bp) | |
449 | { | |
450 | struct riscom_port *port; | |
451 | struct tty_struct *tty; | |
452 | unsigned char count; | |
453 | ||
454 | ||
455 | if (!(port = rc_get_port(bp, "Transmit"))) | |
456 | return; | |
457 | ||
458 | tty = port->tty; | |
459 | ||
460 | if (port->IER & IER_TXEMPTY) { | |
461 | /* FIFO drained */ | |
462 | rc_out(bp, CD180_CAR, port_No(port)); | |
463 | port->IER &= ~IER_TXEMPTY; | |
464 | rc_out(bp, CD180_IER, port->IER); | |
465 | return; | |
466 | } | |
467 | ||
468 | if ((port->xmit_cnt <= 0 && !port->break_length) | |
469 | || tty->stopped || tty->hw_stopped) { | |
470 | rc_out(bp, CD180_CAR, port_No(port)); | |
471 | port->IER &= ~IER_TXRDY; | |
472 | rc_out(bp, CD180_IER, port->IER); | |
473 | return; | |
474 | } | |
475 | ||
476 | if (port->break_length) { | |
477 | if (port->break_length > 0) { | |
478 | if (port->COR2 & COR2_ETC) { | |
479 | rc_out(bp, CD180_TDR, CD180_C_ESC); | |
480 | rc_out(bp, CD180_TDR, CD180_C_SBRK); | |
481 | port->COR2 &= ~COR2_ETC; | |
482 | } | |
483 | count = min_t(int, port->break_length, 0xff); | |
484 | rc_out(bp, CD180_TDR, CD180_C_ESC); | |
485 | rc_out(bp, CD180_TDR, CD180_C_DELAY); | |
486 | rc_out(bp, CD180_TDR, count); | |
487 | if (!(port->break_length -= count)) | |
488 | port->break_length--; | |
489 | } else { | |
490 | rc_out(bp, CD180_TDR, CD180_C_ESC); | |
491 | rc_out(bp, CD180_TDR, CD180_C_EBRK); | |
492 | rc_out(bp, CD180_COR2, port->COR2); | |
493 | rc_wait_CCR(bp); | |
494 | rc_out(bp, CD180_CCR, CCR_CORCHG2); | |
495 | port->break_length = 0; | |
496 | } | |
497 | return; | |
498 | } | |
499 | ||
500 | count = CD180_NFIFO; | |
501 | do { | |
502 | rc_out(bp, CD180_TDR, port->xmit_buf[port->xmit_tail++]); | |
503 | port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1); | |
504 | if (--port->xmit_cnt <= 0) | |
505 | break; | |
506 | } while (--count > 0); | |
507 | ||
508 | if (port->xmit_cnt <= 0) { | |
509 | rc_out(bp, CD180_CAR, port_No(port)); | |
510 | port->IER &= ~IER_TXRDY; | |
511 | rc_out(bp, CD180_IER, port->IER); | |
512 | } | |
513 | if (port->xmit_cnt <= port->wakeup_chars) | |
514 | rc_mark_event(port, RS_EVENT_WRITE_WAKEUP); | |
515 | } | |
516 | ||
517 | static inline void rc_check_modem(struct riscom_board const * bp) | |
518 | { | |
519 | struct riscom_port *port; | |
520 | struct tty_struct *tty; | |
521 | unsigned char mcr; | |
522 | ||
523 | if (!(port = rc_get_port(bp, "Modem"))) | |
524 | return; | |
525 | ||
526 | tty = port->tty; | |
527 | ||
528 | mcr = rc_in(bp, CD180_MCR); | |
529 | if (mcr & MCR_CDCHG) { | |
530 | if (rc_in(bp, CD180_MSVR) & MSVR_CD) | |
531 | wake_up_interruptible(&port->open_wait); | |
532 | else | |
533 | schedule_work(&port->tqueue_hangup); | |
534 | } | |
535 | ||
536 | #ifdef RISCOM_BRAIN_DAMAGED_CTS | |
537 | if (mcr & MCR_CTSCHG) { | |
538 | if (rc_in(bp, CD180_MSVR) & MSVR_CTS) { | |
539 | tty->hw_stopped = 0; | |
540 | port->IER |= IER_TXRDY; | |
541 | if (port->xmit_cnt <= port->wakeup_chars) | |
542 | rc_mark_event(port, RS_EVENT_WRITE_WAKEUP); | |
543 | } else { | |
544 | tty->hw_stopped = 1; | |
545 | port->IER &= ~IER_TXRDY; | |
546 | } | |
547 | rc_out(bp, CD180_IER, port->IER); | |
548 | } | |
549 | if (mcr & MCR_DSRCHG) { | |
550 | if (rc_in(bp, CD180_MSVR) & MSVR_DSR) { | |
551 | tty->hw_stopped = 0; | |
552 | port->IER |= IER_TXRDY; | |
553 | if (port->xmit_cnt <= port->wakeup_chars) | |
554 | rc_mark_event(port, RS_EVENT_WRITE_WAKEUP); | |
555 | } else { | |
556 | tty->hw_stopped = 1; | |
557 | port->IER &= ~IER_TXRDY; | |
558 | } | |
559 | rc_out(bp, CD180_IER, port->IER); | |
560 | } | |
561 | #endif /* RISCOM_BRAIN_DAMAGED_CTS */ | |
562 | ||
563 | /* Clear change bits */ | |
564 | rc_out(bp, CD180_MCR, 0); | |
565 | } | |
566 | ||
567 | /* The main interrupt processing routine */ | |
568 | static irqreturn_t rc_interrupt(int irq, void * dev_id, struct pt_regs * regs) | |
569 | { | |
570 | unsigned char status; | |
571 | unsigned char ack; | |
572 | struct riscom_board *bp; | |
573 | unsigned long loop = 0; | |
574 | int handled = 0; | |
575 | ||
576 | bp = IRQ_to_board[irq]; | |
577 | ||
578 | if (!bp || !(bp->flags & RC_BOARD_ACTIVE)) { | |
579 | return IRQ_NONE; | |
580 | } | |
581 | ||
582 | while ((++loop < 16) && ((status = ~(rc_in(bp, RC_BSR))) & | |
583 | (RC_BSR_TOUT | RC_BSR_TINT | | |
584 | RC_BSR_MINT | RC_BSR_RINT))) { | |
585 | handled = 1; | |
586 | if (status & RC_BSR_TOUT) | |
587 | printk(KERN_WARNING "rc%d: Got timeout. Hardware " | |
588 | "error?\n", board_No(bp)); | |
589 | ||
590 | else if (status & RC_BSR_RINT) { | |
591 | ack = rc_in(bp, RC_ACK_RINT); | |
592 | ||
593 | if (ack == (RC_ID | GIVR_IT_RCV)) | |
594 | rc_receive(bp); | |
595 | else if (ack == (RC_ID | GIVR_IT_REXC)) | |
596 | rc_receive_exc(bp); | |
597 | else | |
598 | printk(KERN_WARNING "rc%d: Bad receive ack " | |
599 | "0x%02x.\n", | |
600 | board_No(bp), ack); | |
601 | ||
602 | } else if (status & RC_BSR_TINT) { | |
603 | ack = rc_in(bp, RC_ACK_TINT); | |
604 | ||
605 | if (ack == (RC_ID | GIVR_IT_TX)) | |
606 | rc_transmit(bp); | |
607 | else | |
608 | printk(KERN_WARNING "rc%d: Bad transmit ack " | |
609 | "0x%02x.\n", | |
610 | board_No(bp), ack); | |
611 | ||
612 | } else /* if (status & RC_BSR_MINT) */ { | |
613 | ack = rc_in(bp, RC_ACK_MINT); | |
614 | ||
615 | if (ack == (RC_ID | GIVR_IT_MODEM)) | |
616 | rc_check_modem(bp); | |
617 | else | |
618 | printk(KERN_WARNING "rc%d: Bad modem ack " | |
619 | "0x%02x.\n", | |
620 | board_No(bp), ack); | |
621 | ||
622 | } | |
623 | ||
624 | rc_out(bp, CD180_EOIR, 0); /* Mark end of interrupt */ | |
625 | rc_out(bp, RC_CTOUT, 0); /* Clear timeout flag */ | |
626 | } | |
627 | return IRQ_RETVAL(handled); | |
628 | } | |
629 | ||
630 | /* | |
631 | * Routines for open & close processing. | |
632 | */ | |
633 | ||
634 | /* Called with disabled interrupts */ | |
635 | static inline int rc_setup_board(struct riscom_board * bp) | |
636 | { | |
637 | int error; | |
638 | ||
639 | if (bp->flags & RC_BOARD_ACTIVE) | |
640 | return 0; | |
641 | ||
642 | error = request_irq(bp->irq, rc_interrupt, SA_INTERRUPT, | |
643 | "RISCom/8", NULL); | |
644 | if (error) | |
645 | return error; | |
646 | ||
647 | rc_out(bp, RC_CTOUT, 0); /* Just in case */ | |
648 | bp->DTR = ~0; | |
649 | rc_out(bp, RC_DTR, bp->DTR); /* Drop DTR on all ports */ | |
650 | ||
651 | IRQ_to_board[bp->irq] = bp; | |
652 | bp->flags |= RC_BOARD_ACTIVE; | |
653 | ||
654 | return 0; | |
655 | } | |
656 | ||
657 | /* Called with disabled interrupts */ | |
658 | static inline void rc_shutdown_board(struct riscom_board *bp) | |
659 | { | |
660 | if (!(bp->flags & RC_BOARD_ACTIVE)) | |
661 | return; | |
662 | ||
663 | bp->flags &= ~RC_BOARD_ACTIVE; | |
664 | ||
665 | free_irq(bp->irq, NULL); | |
666 | IRQ_to_board[bp->irq] = NULL; | |
667 | ||
668 | bp->DTR = ~0; | |
669 | rc_out(bp, RC_DTR, bp->DTR); /* Drop DTR on all ports */ | |
670 | ||
671 | } | |
672 | ||
673 | /* | |
674 | * Setting up port characteristics. | |
675 | * Must be called with disabled interrupts | |
676 | */ | |
677 | static void rc_change_speed(struct riscom_board *bp, struct riscom_port *port) | |
678 | { | |
679 | struct tty_struct *tty; | |
680 | unsigned long baud; | |
681 | long tmp; | |
682 | unsigned char cor1 = 0, cor3 = 0; | |
683 | unsigned char mcor1 = 0, mcor2 = 0; | |
684 | ||
685 | if (!(tty = port->tty) || !tty->termios) | |
686 | return; | |
687 | ||
688 | port->IER = 0; | |
689 | port->COR2 = 0; | |
690 | port->MSVR = MSVR_RTS; | |
691 | ||
692 | baud = C_BAUD(tty); | |
693 | ||
694 | if (baud & CBAUDEX) { | |
695 | baud &= ~CBAUDEX; | |
696 | if (baud < 1 || baud > 2) | |
697 | port->tty->termios->c_cflag &= ~CBAUDEX; | |
698 | else | |
699 | baud += 15; | |
700 | } | |
701 | if (baud == 15) { | |
702 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) | |
703 | baud ++; | |
704 | if ((port->flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) | |
705 | baud += 2; | |
706 | } | |
707 | ||
708 | /* Select port on the board */ | |
709 | rc_out(bp, CD180_CAR, port_No(port)); | |
710 | ||
711 | if (!baud_table[baud]) { | |
712 | /* Drop DTR & exit */ | |
713 | bp->DTR |= (1u << port_No(port)); | |
714 | rc_out(bp, RC_DTR, bp->DTR); | |
715 | return; | |
716 | } else { | |
717 | /* Set DTR on */ | |
718 | bp->DTR &= ~(1u << port_No(port)); | |
719 | rc_out(bp, RC_DTR, bp->DTR); | |
720 | } | |
721 | ||
722 | /* | |
723 | * Now we must calculate some speed depended things | |
724 | */ | |
725 | ||
726 | /* Set baud rate for port */ | |
727 | tmp = (((RC_OSCFREQ + baud_table[baud]/2) / baud_table[baud] + | |
728 | CD180_TPC/2) / CD180_TPC); | |
729 | ||
730 | rc_out(bp, CD180_RBPRH, (tmp >> 8) & 0xff); | |
731 | rc_out(bp, CD180_TBPRH, (tmp >> 8) & 0xff); | |
732 | rc_out(bp, CD180_RBPRL, tmp & 0xff); | |
733 | rc_out(bp, CD180_TBPRL, tmp & 0xff); | |
734 | ||
735 | baud = (baud_table[baud] + 5) / 10; /* Estimated CPS */ | |
736 | ||
737 | /* Two timer ticks seems enough to wakeup something like SLIP driver */ | |
738 | tmp = ((baud + HZ/2) / HZ) * 2 - CD180_NFIFO; | |
739 | port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ? | |
740 | SERIAL_XMIT_SIZE - 1 : tmp); | |
741 | ||
742 | /* Receiver timeout will be transmission time for 1.5 chars */ | |
743 | tmp = (RISCOM_TPS + RISCOM_TPS/2 + baud/2) / baud; | |
744 | tmp = (tmp > 0xff) ? 0xff : tmp; | |
745 | rc_out(bp, CD180_RTPR, tmp); | |
746 | ||
747 | switch (C_CSIZE(tty)) { | |
748 | case CS5: | |
749 | cor1 |= COR1_5BITS; | |
750 | break; | |
751 | case CS6: | |
752 | cor1 |= COR1_6BITS; | |
753 | break; | |
754 | case CS7: | |
755 | cor1 |= COR1_7BITS; | |
756 | break; | |
757 | case CS8: | |
758 | cor1 |= COR1_8BITS; | |
759 | break; | |
760 | } | |
761 | ||
762 | if (C_CSTOPB(tty)) | |
763 | cor1 |= COR1_2SB; | |
764 | ||
765 | cor1 |= COR1_IGNORE; | |
766 | if (C_PARENB(tty)) { | |
767 | cor1 |= COR1_NORMPAR; | |
768 | if (C_PARODD(tty)) | |
769 | cor1 |= COR1_ODDP; | |
770 | if (I_INPCK(tty)) | |
771 | cor1 &= ~COR1_IGNORE; | |
772 | } | |
773 | /* Set marking of some errors */ | |
774 | port->mark_mask = RCSR_OE | RCSR_TOUT; | |
775 | if (I_INPCK(tty)) | |
776 | port->mark_mask |= RCSR_FE | RCSR_PE; | |
777 | if (I_BRKINT(tty) || I_PARMRK(tty)) | |
778 | port->mark_mask |= RCSR_BREAK; | |
779 | if (I_IGNPAR(tty)) | |
780 | port->mark_mask &= ~(RCSR_FE | RCSR_PE); | |
781 | if (I_IGNBRK(tty)) { | |
782 | port->mark_mask &= ~RCSR_BREAK; | |
783 | if (I_IGNPAR(tty)) | |
784 | /* Real raw mode. Ignore all */ | |
785 | port->mark_mask &= ~RCSR_OE; | |
786 | } | |
787 | /* Enable Hardware Flow Control */ | |
788 | if (C_CRTSCTS(tty)) { | |
789 | #ifdef RISCOM_BRAIN_DAMAGED_CTS | |
790 | port->IER |= IER_DSR | IER_CTS; | |
791 | mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD; | |
792 | mcor2 |= MCOR2_DSROD | MCOR2_CTSOD; | |
793 | tty->hw_stopped = !(rc_in(bp, CD180_MSVR) & (MSVR_CTS|MSVR_DSR)); | |
794 | #else | |
795 | port->COR2 |= COR2_CTSAE; | |
796 | #endif | |
797 | } | |
798 | /* Enable Software Flow Control. FIXME: I'm not sure about this */ | |
799 | /* Some people reported that it works, but I still doubt */ | |
800 | if (I_IXON(tty)) { | |
801 | port->COR2 |= COR2_TXIBE; | |
802 | cor3 |= (COR3_FCT | COR3_SCDE); | |
803 | if (I_IXANY(tty)) | |
804 | port->COR2 |= COR2_IXM; | |
805 | rc_out(bp, CD180_SCHR1, START_CHAR(tty)); | |
806 | rc_out(bp, CD180_SCHR2, STOP_CHAR(tty)); | |
807 | rc_out(bp, CD180_SCHR3, START_CHAR(tty)); | |
808 | rc_out(bp, CD180_SCHR4, STOP_CHAR(tty)); | |
809 | } | |
810 | if (!C_CLOCAL(tty)) { | |
811 | /* Enable CD check */ | |
812 | port->IER |= IER_CD; | |
813 | mcor1 |= MCOR1_CDZD; | |
814 | mcor2 |= MCOR2_CDOD; | |
815 | } | |
816 | ||
817 | if (C_CREAD(tty)) | |
818 | /* Enable receiver */ | |
819 | port->IER |= IER_RXD; | |
820 | ||
821 | /* Set input FIFO size (1-8 bytes) */ | |
822 | cor3 |= RISCOM_RXFIFO; | |
823 | /* Setting up CD180 channel registers */ | |
824 | rc_out(bp, CD180_COR1, cor1); | |
825 | rc_out(bp, CD180_COR2, port->COR2); | |
826 | rc_out(bp, CD180_COR3, cor3); | |
827 | /* Make CD180 know about registers change */ | |
828 | rc_wait_CCR(bp); | |
829 | rc_out(bp, CD180_CCR, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3); | |
830 | /* Setting up modem option registers */ | |
831 | rc_out(bp, CD180_MCOR1, mcor1); | |
832 | rc_out(bp, CD180_MCOR2, mcor2); | |
833 | /* Enable CD180 transmitter & receiver */ | |
834 | rc_wait_CCR(bp); | |
835 | rc_out(bp, CD180_CCR, CCR_TXEN | CCR_RXEN); | |
836 | /* Enable interrupts */ | |
837 | rc_out(bp, CD180_IER, port->IER); | |
838 | /* And finally set RTS on */ | |
839 | rc_out(bp, CD180_MSVR, port->MSVR); | |
840 | } | |
841 | ||
842 | /* Must be called with interrupts enabled */ | |
843 | static int rc_setup_port(struct riscom_board *bp, struct riscom_port *port) | |
844 | { | |
845 | unsigned long flags; | |
846 | ||
847 | if (port->flags & ASYNC_INITIALIZED) | |
848 | return 0; | |
849 | ||
850 | if (!port->xmit_buf) { | |
851 | /* We may sleep in get_zeroed_page() */ | |
852 | unsigned long tmp; | |
853 | ||
854 | if (!(tmp = get_zeroed_page(GFP_KERNEL))) | |
855 | return -ENOMEM; | |
856 | ||
857 | if (port->xmit_buf) { | |
858 | free_page(tmp); | |
859 | return -ERESTARTSYS; | |
860 | } | |
861 | port->xmit_buf = (unsigned char *) tmp; | |
862 | } | |
863 | ||
864 | save_flags(flags); cli(); | |
865 | ||
866 | if (port->tty) | |
867 | clear_bit(TTY_IO_ERROR, &port->tty->flags); | |
868 | ||
869 | if (port->count == 1) | |
870 | bp->count++; | |
871 | ||
872 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; | |
873 | rc_change_speed(bp, port); | |
874 | port->flags |= ASYNC_INITIALIZED; | |
875 | ||
876 | restore_flags(flags); | |
877 | return 0; | |
878 | } | |
879 | ||
880 | /* Must be called with interrupts disabled */ | |
881 | static void rc_shutdown_port(struct riscom_board *bp, struct riscom_port *port) | |
882 | { | |
883 | struct tty_struct *tty; | |
884 | ||
885 | if (!(port->flags & ASYNC_INITIALIZED)) | |
886 | return; | |
887 | ||
888 | #ifdef RC_REPORT_OVERRUN | |
889 | printk(KERN_INFO "rc%d: port %d: Total %ld overruns were detected.\n", | |
890 | board_No(bp), port_No(port), port->overrun); | |
891 | #endif | |
892 | #ifdef RC_REPORT_FIFO | |
893 | { | |
894 | int i; | |
895 | ||
896 | printk(KERN_INFO "rc%d: port %d: FIFO hits [ ", | |
897 | board_No(bp), port_No(port)); | |
898 | for (i = 0; i < 10; i++) { | |
899 | printk("%ld ", port->hits[i]); | |
900 | } | |
901 | printk("].\n"); | |
902 | } | |
903 | #endif | |
904 | if (port->xmit_buf) { | |
905 | free_page((unsigned long) port->xmit_buf); | |
906 | port->xmit_buf = NULL; | |
907 | } | |
908 | ||
909 | if (!(tty = port->tty) || C_HUPCL(tty)) { | |
910 | /* Drop DTR */ | |
911 | bp->DTR |= (1u << port_No(port)); | |
912 | rc_out(bp, RC_DTR, bp->DTR); | |
913 | } | |
914 | ||
915 | /* Select port */ | |
916 | rc_out(bp, CD180_CAR, port_No(port)); | |
917 | /* Reset port */ | |
918 | rc_wait_CCR(bp); | |
919 | rc_out(bp, CD180_CCR, CCR_SOFTRESET); | |
920 | /* Disable all interrupts from this port */ | |
921 | port->IER = 0; | |
922 | rc_out(bp, CD180_IER, port->IER); | |
923 | ||
924 | if (tty) | |
925 | set_bit(TTY_IO_ERROR, &tty->flags); | |
926 | port->flags &= ~ASYNC_INITIALIZED; | |
927 | ||
928 | if (--bp->count < 0) { | |
929 | printk(KERN_INFO "rc%d: rc_shutdown_port: " | |
930 | "bad board count: %d\n", | |
931 | board_No(bp), bp->count); | |
932 | bp->count = 0; | |
933 | } | |
934 | ||
935 | /* | |
936 | * If this is the last opened port on the board | |
937 | * shutdown whole board | |
938 | */ | |
939 | if (!bp->count) | |
940 | rc_shutdown_board(bp); | |
941 | } | |
942 | ||
943 | ||
944 | static int block_til_ready(struct tty_struct *tty, struct file * filp, | |
945 | struct riscom_port *port) | |
946 | { | |
947 | DECLARE_WAITQUEUE(wait, current); | |
948 | struct riscom_board *bp = port_Board(port); | |
949 | int retval; | |
950 | int do_clocal = 0; | |
951 | int CD; | |
952 | ||
953 | /* | |
954 | * If the device is in the middle of being closed, then block | |
955 | * until it's done, and then try again. | |
956 | */ | |
957 | if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { | |
958 | interruptible_sleep_on(&port->close_wait); | |
959 | if (port->flags & ASYNC_HUP_NOTIFY) | |
960 | return -EAGAIN; | |
961 | else | |
962 | return -ERESTARTSYS; | |
963 | } | |
964 | ||
965 | /* | |
966 | * If non-blocking mode is set, or the port is not enabled, | |
967 | * then make the check up front and then exit. | |
968 | */ | |
969 | if ((filp->f_flags & O_NONBLOCK) || | |
970 | (tty->flags & (1 << TTY_IO_ERROR))) { | |
971 | port->flags |= ASYNC_NORMAL_ACTIVE; | |
972 | return 0; | |
973 | } | |
974 | ||
975 | if (C_CLOCAL(tty)) | |
976 | do_clocal = 1; | |
977 | ||
978 | /* | |
979 | * Block waiting for the carrier detect and the line to become | |
980 | * free (i.e., not in use by the callout). While we are in | |
981 | * this loop, info->count is dropped by one, so that | |
982 | * rs_close() knows when to free things. We restore it upon | |
983 | * exit, either normal or abnormal. | |
984 | */ | |
985 | retval = 0; | |
986 | add_wait_queue(&port->open_wait, &wait); | |
987 | cli(); | |
988 | if (!tty_hung_up_p(filp)) | |
989 | port->count--; | |
990 | sti(); | |
991 | port->blocked_open++; | |
992 | while (1) { | |
993 | cli(); | |
994 | rc_out(bp, CD180_CAR, port_No(port)); | |
995 | CD = rc_in(bp, CD180_MSVR) & MSVR_CD; | |
996 | rc_out(bp, CD180_MSVR, MSVR_RTS); | |
997 | bp->DTR &= ~(1u << port_No(port)); | |
998 | rc_out(bp, RC_DTR, bp->DTR); | |
999 | sti(); | |
1000 | set_current_state(TASK_INTERRUPTIBLE); | |
1001 | if (tty_hung_up_p(filp) || | |
1002 | !(port->flags & ASYNC_INITIALIZED)) { | |
1003 | if (port->flags & ASYNC_HUP_NOTIFY) | |
1004 | retval = -EAGAIN; | |
1005 | else | |
1006 | retval = -ERESTARTSYS; | |
1007 | break; | |
1008 | } | |
1009 | if (!(port->flags & ASYNC_CLOSING) && | |
1010 | (do_clocal || CD)) | |
1011 | break; | |
1012 | if (signal_pending(current)) { | |
1013 | retval = -ERESTARTSYS; | |
1014 | break; | |
1015 | } | |
1016 | schedule(); | |
1017 | } | |
1018 | current->state = TASK_RUNNING; | |
1019 | remove_wait_queue(&port->open_wait, &wait); | |
1020 | if (!tty_hung_up_p(filp)) | |
1021 | port->count++; | |
1022 | port->blocked_open--; | |
1023 | if (retval) | |
1024 | return retval; | |
1025 | ||
1026 | port->flags |= ASYNC_NORMAL_ACTIVE; | |
1027 | return 0; | |
1028 | } | |
1029 | ||
1030 | static int rc_open(struct tty_struct * tty, struct file * filp) | |
1031 | { | |
1032 | int board; | |
1033 | int error; | |
1034 | struct riscom_port * port; | |
1035 | struct riscom_board * bp; | |
1036 | ||
1037 | board = RC_BOARD(tty->index); | |
1038 | if (board >= RC_NBOARD || !(rc_board[board].flags & RC_BOARD_PRESENT)) | |
1039 | return -ENODEV; | |
1040 | ||
1041 | bp = &rc_board[board]; | |
1042 | port = rc_port + board * RC_NPORT + RC_PORT(tty->index); | |
1043 | if (rc_paranoia_check(port, tty->name, "rc_open")) | |
1044 | return -ENODEV; | |
1045 | ||
1046 | if ((error = rc_setup_board(bp))) | |
1047 | return error; | |
1048 | ||
1049 | port->count++; | |
1050 | tty->driver_data = port; | |
1051 | port->tty = tty; | |
1052 | ||
1053 | if ((error = rc_setup_port(bp, port))) | |
1054 | return error; | |
1055 | ||
1056 | if ((error = block_til_ready(tty, filp, port))) | |
1057 | return error; | |
1058 | ||
1059 | return 0; | |
1060 | } | |
1061 | ||
1062 | static void rc_close(struct tty_struct * tty, struct file * filp) | |
1063 | { | |
1064 | struct riscom_port *port = (struct riscom_port *) tty->driver_data; | |
1065 | struct riscom_board *bp; | |
1066 | unsigned long flags; | |
1067 | unsigned long timeout; | |
1068 | ||
1069 | if (!port || rc_paranoia_check(port, tty->name, "close")) | |
1070 | return; | |
1071 | ||
1072 | save_flags(flags); cli(); | |
1073 | if (tty_hung_up_p(filp)) | |
1074 | goto out; | |
1075 | ||
1076 | bp = port_Board(port); | |
1077 | if ((tty->count == 1) && (port->count != 1)) { | |
1078 | printk(KERN_INFO "rc%d: rc_close: bad port count;" | |
1079 | " tty->count is 1, port count is %d\n", | |
1080 | board_No(bp), port->count); | |
1081 | port->count = 1; | |
1082 | } | |
1083 | if (--port->count < 0) { | |
1084 | printk(KERN_INFO "rc%d: rc_close: bad port count " | |
1085 | "for tty%d: %d\n", | |
1086 | board_No(bp), port_No(port), port->count); | |
1087 | port->count = 0; | |
1088 | } | |
1089 | if (port->count) | |
1090 | goto out; | |
1091 | port->flags |= ASYNC_CLOSING; | |
1092 | /* | |
1093 | * Now we wait for the transmit buffer to clear; and we notify | |
1094 | * the line discipline to only process XON/XOFF characters. | |
1095 | */ | |
1096 | tty->closing = 1; | |
1097 | if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) | |
1098 | tty_wait_until_sent(tty, port->closing_wait); | |
1099 | /* | |
1100 | * At this point we stop accepting input. To do this, we | |
1101 | * disable the receive line status interrupts, and tell the | |
1102 | * interrupt driver to stop checking the data ready bit in the | |
1103 | * line status register. | |
1104 | */ | |
1105 | port->IER &= ~IER_RXD; | |
1106 | if (port->flags & ASYNC_INITIALIZED) { | |
1107 | port->IER &= ~IER_TXRDY; | |
1108 | port->IER |= IER_TXEMPTY; | |
1109 | rc_out(bp, CD180_CAR, port_No(port)); | |
1110 | rc_out(bp, CD180_IER, port->IER); | |
1111 | /* | |
1112 | * Before we drop DTR, make sure the UART transmitter | |
1113 | * has completely drained; this is especially | |
1114 | * important if there is a transmit FIFO! | |
1115 | */ | |
1116 | timeout = jiffies+HZ; | |
1117 | while(port->IER & IER_TXEMPTY) { | |
1118 | msleep_interruptible(jiffies_to_msecs(port->timeout)); | |
1119 | if (time_after(jiffies, timeout)) | |
1120 | break; | |
1121 | } | |
1122 | } | |
1123 | rc_shutdown_port(bp, port); | |
1124 | if (tty->driver->flush_buffer) | |
1125 | tty->driver->flush_buffer(tty); | |
1126 | tty_ldisc_flush(tty); | |
1127 | ||
1128 | tty->closing = 0; | |
1129 | port->event = 0; | |
1130 | port->tty = NULL; | |
1131 | if (port->blocked_open) { | |
1132 | if (port->close_delay) { | |
1133 | msleep_interruptible(jiffies_to_msecs(port->close_delay)); | |
1134 | } | |
1135 | wake_up_interruptible(&port->open_wait); | |
1136 | } | |
1137 | port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); | |
1138 | wake_up_interruptible(&port->close_wait); | |
1139 | out: restore_flags(flags); | |
1140 | } | |
1141 | ||
1142 | static int rc_write(struct tty_struct * tty, | |
1143 | const unsigned char *buf, int count) | |
1144 | { | |
1145 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1146 | struct riscom_board *bp; | |
1147 | int c, total = 0; | |
1148 | unsigned long flags; | |
1149 | ||
1150 | if (rc_paranoia_check(port, tty->name, "rc_write")) | |
1151 | return 0; | |
1152 | ||
1153 | bp = port_Board(port); | |
1154 | ||
1155 | if (!tty || !port->xmit_buf || !tmp_buf) | |
1156 | return 0; | |
1157 | ||
1158 | save_flags(flags); | |
1159 | while (1) { | |
1160 | cli(); | |
1161 | c = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1, | |
1162 | SERIAL_XMIT_SIZE - port->xmit_head)); | |
1163 | if (c <= 0) { | |
1164 | restore_flags(flags); | |
1165 | break; | |
1166 | } | |
1167 | ||
1168 | memcpy(port->xmit_buf + port->xmit_head, buf, c); | |
1169 | port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1); | |
1170 | port->xmit_cnt += c; | |
1171 | restore_flags(flags); | |
1172 | ||
1173 | buf += c; | |
1174 | count -= c; | |
1175 | total += c; | |
1176 | } | |
1177 | ||
1178 | cli(); | |
1179 | if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped && | |
1180 | !(port->IER & IER_TXRDY)) { | |
1181 | port->IER |= IER_TXRDY; | |
1182 | rc_out(bp, CD180_CAR, port_No(port)); | |
1183 | rc_out(bp, CD180_IER, port->IER); | |
1184 | } | |
1185 | restore_flags(flags); | |
1186 | ||
1187 | return total; | |
1188 | } | |
1189 | ||
1190 | static void rc_put_char(struct tty_struct * tty, unsigned char ch) | |
1191 | { | |
1192 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1193 | unsigned long flags; | |
1194 | ||
1195 | if (rc_paranoia_check(port, tty->name, "rc_put_char")) | |
1196 | return; | |
1197 | ||
1198 | if (!tty || !port->xmit_buf) | |
1199 | return; | |
1200 | ||
1201 | save_flags(flags); cli(); | |
1202 | ||
1203 | if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) | |
1204 | goto out; | |
1205 | ||
1206 | port->xmit_buf[port->xmit_head++] = ch; | |
1207 | port->xmit_head &= SERIAL_XMIT_SIZE - 1; | |
1208 | port->xmit_cnt++; | |
1209 | out: restore_flags(flags); | |
1210 | } | |
1211 | ||
1212 | static void rc_flush_chars(struct tty_struct * tty) | |
1213 | { | |
1214 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1215 | unsigned long flags; | |
1216 | ||
1217 | if (rc_paranoia_check(port, tty->name, "rc_flush_chars")) | |
1218 | return; | |
1219 | ||
1220 | if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || | |
1221 | !port->xmit_buf) | |
1222 | return; | |
1223 | ||
1224 | save_flags(flags); cli(); | |
1225 | port->IER |= IER_TXRDY; | |
1226 | rc_out(port_Board(port), CD180_CAR, port_No(port)); | |
1227 | rc_out(port_Board(port), CD180_IER, port->IER); | |
1228 | restore_flags(flags); | |
1229 | } | |
1230 | ||
1231 | static int rc_write_room(struct tty_struct * tty) | |
1232 | { | |
1233 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1234 | int ret; | |
1235 | ||
1236 | if (rc_paranoia_check(port, tty->name, "rc_write_room")) | |
1237 | return 0; | |
1238 | ||
1239 | ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; | |
1240 | if (ret < 0) | |
1241 | ret = 0; | |
1242 | return ret; | |
1243 | } | |
1244 | ||
1245 | static int rc_chars_in_buffer(struct tty_struct *tty) | |
1246 | { | |
1247 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1248 | ||
1249 | if (rc_paranoia_check(port, tty->name, "rc_chars_in_buffer")) | |
1250 | return 0; | |
1251 | ||
1252 | return port->xmit_cnt; | |
1253 | } | |
1254 | ||
1255 | static void rc_flush_buffer(struct tty_struct *tty) | |
1256 | { | |
1257 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1258 | unsigned long flags; | |
1259 | ||
1260 | if (rc_paranoia_check(port, tty->name, "rc_flush_buffer")) | |
1261 | return; | |
1262 | ||
1263 | save_flags(flags); cli(); | |
1264 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; | |
1265 | restore_flags(flags); | |
1266 | ||
1267 | wake_up_interruptible(&tty->write_wait); | |
1268 | tty_wakeup(tty); | |
1269 | } | |
1270 | ||
1271 | static int rc_tiocmget(struct tty_struct *tty, struct file *file) | |
1272 | { | |
1273 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1274 | struct riscom_board * bp; | |
1275 | unsigned char status; | |
1276 | unsigned int result; | |
1277 | unsigned long flags; | |
1278 | ||
1279 | if (rc_paranoia_check(port, tty->name, __FUNCTION__)) | |
1280 | return -ENODEV; | |
1281 | ||
1282 | bp = port_Board(port); | |
1283 | save_flags(flags); cli(); | |
1284 | rc_out(bp, CD180_CAR, port_No(port)); | |
1285 | status = rc_in(bp, CD180_MSVR); | |
1286 | result = rc_in(bp, RC_RI) & (1u << port_No(port)) ? 0 : TIOCM_RNG; | |
1287 | restore_flags(flags); | |
1288 | result |= ((status & MSVR_RTS) ? TIOCM_RTS : 0) | |
1289 | | ((status & MSVR_DTR) ? TIOCM_DTR : 0) | |
1290 | | ((status & MSVR_CD) ? TIOCM_CAR : 0) | |
1291 | | ((status & MSVR_DSR) ? TIOCM_DSR : 0) | |
1292 | | ((status & MSVR_CTS) ? TIOCM_CTS : 0); | |
1293 | return result; | |
1294 | } | |
1295 | ||
1296 | static int rc_tiocmset(struct tty_struct *tty, struct file *file, | |
1297 | unsigned int set, unsigned int clear) | |
1298 | { | |
1299 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1300 | unsigned long flags; | |
1301 | struct riscom_board *bp; | |
1302 | ||
1303 | if (rc_paranoia_check(port, tty->name, __FUNCTION__)) | |
1304 | return -ENODEV; | |
1305 | ||
1306 | bp = port_Board(port); | |
1307 | ||
1308 | save_flags(flags); cli(); | |
1309 | if (set & TIOCM_RTS) | |
1310 | port->MSVR |= MSVR_RTS; | |
1311 | if (set & TIOCM_DTR) | |
1312 | bp->DTR &= ~(1u << port_No(port)); | |
1313 | ||
1314 | if (clear & TIOCM_RTS) | |
1315 | port->MSVR &= ~MSVR_RTS; | |
1316 | if (clear & TIOCM_DTR) | |
1317 | bp->DTR |= (1u << port_No(port)); | |
1318 | ||
1319 | rc_out(bp, CD180_CAR, port_No(port)); | |
1320 | rc_out(bp, CD180_MSVR, port->MSVR); | |
1321 | rc_out(bp, RC_DTR, bp->DTR); | |
1322 | restore_flags(flags); | |
1323 | return 0; | |
1324 | } | |
1325 | ||
1326 | static inline void rc_send_break(struct riscom_port * port, unsigned long length) | |
1327 | { | |
1328 | struct riscom_board *bp = port_Board(port); | |
1329 | unsigned long flags; | |
1330 | ||
1331 | save_flags(flags); cli(); | |
1332 | port->break_length = RISCOM_TPS / HZ * length; | |
1333 | port->COR2 |= COR2_ETC; | |
1334 | port->IER |= IER_TXRDY; | |
1335 | rc_out(bp, CD180_CAR, port_No(port)); | |
1336 | rc_out(bp, CD180_COR2, port->COR2); | |
1337 | rc_out(bp, CD180_IER, port->IER); | |
1338 | rc_wait_CCR(bp); | |
1339 | rc_out(bp, CD180_CCR, CCR_CORCHG2); | |
1340 | rc_wait_CCR(bp); | |
1341 | restore_flags(flags); | |
1342 | } | |
1343 | ||
1344 | static inline int rc_set_serial_info(struct riscom_port * port, | |
1345 | struct serial_struct __user * newinfo) | |
1346 | { | |
1347 | struct serial_struct tmp; | |
1348 | struct riscom_board *bp = port_Board(port); | |
1349 | int change_speed; | |
1350 | unsigned long flags; | |
1351 | ||
1352 | if (copy_from_user(&tmp, newinfo, sizeof(tmp))) | |
1353 | return -EFAULT; | |
1354 | ||
1355 | #if 0 | |
1356 | if ((tmp.irq != bp->irq) || | |
1357 | (tmp.port != bp->base) || | |
1358 | (tmp.type != PORT_CIRRUS) || | |
1359 | (tmp.baud_base != (RC_OSCFREQ + CD180_TPC/2) / CD180_TPC) || | |
1360 | (tmp.custom_divisor != 0) || | |
1361 | (tmp.xmit_fifo_size != CD180_NFIFO) || | |
1362 | (tmp.flags & ~RISCOM_LEGAL_FLAGS)) | |
1363 | return -EINVAL; | |
1364 | #endif | |
1365 | ||
1366 | change_speed = ((port->flags & ASYNC_SPD_MASK) != | |
1367 | (tmp.flags & ASYNC_SPD_MASK)); | |
1368 | ||
1369 | if (!capable(CAP_SYS_ADMIN)) { | |
1370 | if ((tmp.close_delay != port->close_delay) || | |
1371 | (tmp.closing_wait != port->closing_wait) || | |
1372 | ((tmp.flags & ~ASYNC_USR_MASK) != | |
1373 | (port->flags & ~ASYNC_USR_MASK))) | |
1374 | return -EPERM; | |
1375 | port->flags = ((port->flags & ~ASYNC_USR_MASK) | | |
1376 | (tmp.flags & ASYNC_USR_MASK)); | |
1377 | } else { | |
1378 | port->flags = ((port->flags & ~ASYNC_FLAGS) | | |
1379 | (tmp.flags & ASYNC_FLAGS)); | |
1380 | port->close_delay = tmp.close_delay; | |
1381 | port->closing_wait = tmp.closing_wait; | |
1382 | } | |
1383 | if (change_speed) { | |
1384 | save_flags(flags); cli(); | |
1385 | rc_change_speed(bp, port); | |
1386 | restore_flags(flags); | |
1387 | } | |
1388 | return 0; | |
1389 | } | |
1390 | ||
1391 | static inline int rc_get_serial_info(struct riscom_port * port, | |
1392 | struct serial_struct __user *retinfo) | |
1393 | { | |
1394 | struct serial_struct tmp; | |
1395 | struct riscom_board *bp = port_Board(port); | |
1396 | ||
1397 | memset(&tmp, 0, sizeof(tmp)); | |
1398 | tmp.type = PORT_CIRRUS; | |
1399 | tmp.line = port - rc_port; | |
1400 | tmp.port = bp->base; | |
1401 | tmp.irq = bp->irq; | |
1402 | tmp.flags = port->flags; | |
1403 | tmp.baud_base = (RC_OSCFREQ + CD180_TPC/2) / CD180_TPC; | |
1404 | tmp.close_delay = port->close_delay * HZ/100; | |
1405 | tmp.closing_wait = port->closing_wait * HZ/100; | |
1406 | tmp.xmit_fifo_size = CD180_NFIFO; | |
1407 | return copy_to_user(retinfo, &tmp, sizeof(tmp)) ? -EFAULT : 0; | |
1408 | } | |
1409 | ||
1410 | static int rc_ioctl(struct tty_struct * tty, struct file * filp, | |
1411 | unsigned int cmd, unsigned long arg) | |
1412 | ||
1413 | { | |
1414 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1415 | void __user *argp = (void __user *)arg; | |
1416 | int retval; | |
1417 | ||
1418 | if (rc_paranoia_check(port, tty->name, "rc_ioctl")) | |
1419 | return -ENODEV; | |
1420 | ||
1421 | switch (cmd) { | |
1422 | case TCSBRK: /* SVID version: non-zero arg --> no break */ | |
1423 | retval = tty_check_change(tty); | |
1424 | if (retval) | |
1425 | return retval; | |
1426 | tty_wait_until_sent(tty, 0); | |
1427 | if (!arg) | |
1428 | rc_send_break(port, HZ/4); /* 1/4 second */ | |
1429 | break; | |
1430 | case TCSBRKP: /* support for POSIX tcsendbreak() */ | |
1431 | retval = tty_check_change(tty); | |
1432 | if (retval) | |
1433 | return retval; | |
1434 | tty_wait_until_sent(tty, 0); | |
1435 | rc_send_break(port, arg ? arg*(HZ/10) : HZ/4); | |
1436 | break; | |
1437 | case TIOCGSOFTCAR: | |
1438 | return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned __user *)argp); | |
1439 | case TIOCSSOFTCAR: | |
1440 | if (get_user(arg,(unsigned __user *) argp)) | |
1441 | return -EFAULT; | |
1442 | tty->termios->c_cflag = | |
1443 | ((tty->termios->c_cflag & ~CLOCAL) | | |
1444 | (arg ? CLOCAL : 0)); | |
1445 | break; | |
1446 | case TIOCGSERIAL: | |
1447 | return rc_get_serial_info(port, argp); | |
1448 | case TIOCSSERIAL: | |
1449 | return rc_set_serial_info(port, argp); | |
1450 | default: | |
1451 | return -ENOIOCTLCMD; | |
1452 | } | |
1453 | return 0; | |
1454 | } | |
1455 | ||
1456 | static void rc_throttle(struct tty_struct * tty) | |
1457 | { | |
1458 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1459 | struct riscom_board *bp; | |
1460 | unsigned long flags; | |
1461 | ||
1462 | if (rc_paranoia_check(port, tty->name, "rc_throttle")) | |
1463 | return; | |
1464 | ||
1465 | bp = port_Board(port); | |
1466 | ||
1467 | save_flags(flags); cli(); | |
1468 | port->MSVR &= ~MSVR_RTS; | |
1469 | rc_out(bp, CD180_CAR, port_No(port)); | |
1470 | if (I_IXOFF(tty)) { | |
1471 | rc_wait_CCR(bp); | |
1472 | rc_out(bp, CD180_CCR, CCR_SSCH2); | |
1473 | rc_wait_CCR(bp); | |
1474 | } | |
1475 | rc_out(bp, CD180_MSVR, port->MSVR); | |
1476 | restore_flags(flags); | |
1477 | } | |
1478 | ||
1479 | static void rc_unthrottle(struct tty_struct * tty) | |
1480 | { | |
1481 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1482 | struct riscom_board *bp; | |
1483 | unsigned long flags; | |
1484 | ||
1485 | if (rc_paranoia_check(port, tty->name, "rc_unthrottle")) | |
1486 | return; | |
1487 | ||
1488 | bp = port_Board(port); | |
1489 | ||
1490 | save_flags(flags); cli(); | |
1491 | port->MSVR |= MSVR_RTS; | |
1492 | rc_out(bp, CD180_CAR, port_No(port)); | |
1493 | if (I_IXOFF(tty)) { | |
1494 | rc_wait_CCR(bp); | |
1495 | rc_out(bp, CD180_CCR, CCR_SSCH1); | |
1496 | rc_wait_CCR(bp); | |
1497 | } | |
1498 | rc_out(bp, CD180_MSVR, port->MSVR); | |
1499 | restore_flags(flags); | |
1500 | } | |
1501 | ||
1502 | static void rc_stop(struct tty_struct * tty) | |
1503 | { | |
1504 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1505 | struct riscom_board *bp; | |
1506 | unsigned long flags; | |
1507 | ||
1508 | if (rc_paranoia_check(port, tty->name, "rc_stop")) | |
1509 | return; | |
1510 | ||
1511 | bp = port_Board(port); | |
1512 | ||
1513 | save_flags(flags); cli(); | |
1514 | port->IER &= ~IER_TXRDY; | |
1515 | rc_out(bp, CD180_CAR, port_No(port)); | |
1516 | rc_out(bp, CD180_IER, port->IER); | |
1517 | restore_flags(flags); | |
1518 | } | |
1519 | ||
1520 | static void rc_start(struct tty_struct * tty) | |
1521 | { | |
1522 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1523 | struct riscom_board *bp; | |
1524 | unsigned long flags; | |
1525 | ||
1526 | if (rc_paranoia_check(port, tty->name, "rc_start")) | |
1527 | return; | |
1528 | ||
1529 | bp = port_Board(port); | |
1530 | ||
1531 | save_flags(flags); cli(); | |
1532 | if (port->xmit_cnt && port->xmit_buf && !(port->IER & IER_TXRDY)) { | |
1533 | port->IER |= IER_TXRDY; | |
1534 | rc_out(bp, CD180_CAR, port_No(port)); | |
1535 | rc_out(bp, CD180_IER, port->IER); | |
1536 | } | |
1537 | restore_flags(flags); | |
1538 | } | |
1539 | ||
1540 | /* | |
1541 | * This routine is called from the work queue when the interrupt | |
1542 | * routine has signalled that a hangup has occurred. The path of | |
1543 | * hangup processing is: | |
1544 | * | |
1545 | * serial interrupt routine -> (workqueue) -> | |
1546 | * do_rc_hangup() -> tty->hangup() -> rc_hangup() | |
1547 | * | |
1548 | */ | |
1549 | static void do_rc_hangup(void *private_) | |
1550 | { | |
1551 | struct riscom_port *port = (struct riscom_port *) private_; | |
1552 | struct tty_struct *tty; | |
1553 | ||
1554 | tty = port->tty; | |
1555 | if (tty) | |
1556 | tty_hangup(tty); /* FIXME: module removal race still here */ | |
1557 | } | |
1558 | ||
1559 | static void rc_hangup(struct tty_struct * tty) | |
1560 | { | |
1561 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1562 | struct riscom_board *bp; | |
1563 | ||
1564 | if (rc_paranoia_check(port, tty->name, "rc_hangup")) | |
1565 | return; | |
1566 | ||
1567 | bp = port_Board(port); | |
1568 | ||
1569 | rc_shutdown_port(bp, port); | |
1570 | port->event = 0; | |
1571 | port->count = 0; | |
1572 | port->flags &= ~ASYNC_NORMAL_ACTIVE; | |
1573 | port->tty = NULL; | |
1574 | wake_up_interruptible(&port->open_wait); | |
1575 | } | |
1576 | ||
1577 | static void rc_set_termios(struct tty_struct * tty, struct termios * old_termios) | |
1578 | { | |
1579 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1580 | unsigned long flags; | |
1581 | ||
1582 | if (rc_paranoia_check(port, tty->name, "rc_set_termios")) | |
1583 | return; | |
1584 | ||
1585 | if (tty->termios->c_cflag == old_termios->c_cflag && | |
1586 | tty->termios->c_iflag == old_termios->c_iflag) | |
1587 | return; | |
1588 | ||
1589 | save_flags(flags); cli(); | |
1590 | rc_change_speed(port_Board(port), port); | |
1591 | restore_flags(flags); | |
1592 | ||
1593 | if ((old_termios->c_cflag & CRTSCTS) && | |
1594 | !(tty->termios->c_cflag & CRTSCTS)) { | |
1595 | tty->hw_stopped = 0; | |
1596 | rc_start(tty); | |
1597 | } | |
1598 | } | |
1599 | ||
1600 | static void do_softint(void *private_) | |
1601 | { | |
1602 | struct riscom_port *port = (struct riscom_port *) private_; | |
1603 | struct tty_struct *tty; | |
1604 | ||
1605 | if(!(tty = port->tty)) | |
1606 | return; | |
1607 | ||
1608 | if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &port->event)) { | |
1609 | tty_wakeup(tty); | |
1610 | wake_up_interruptible(&tty->write_wait); | |
1611 | } | |
1612 | } | |
1613 | ||
1614 | static struct tty_operations riscom_ops = { | |
1615 | .open = rc_open, | |
1616 | .close = rc_close, | |
1617 | .write = rc_write, | |
1618 | .put_char = rc_put_char, | |
1619 | .flush_chars = rc_flush_chars, | |
1620 | .write_room = rc_write_room, | |
1621 | .chars_in_buffer = rc_chars_in_buffer, | |
1622 | .flush_buffer = rc_flush_buffer, | |
1623 | .ioctl = rc_ioctl, | |
1624 | .throttle = rc_throttle, | |
1625 | .unthrottle = rc_unthrottle, | |
1626 | .set_termios = rc_set_termios, | |
1627 | .stop = rc_stop, | |
1628 | .start = rc_start, | |
1629 | .hangup = rc_hangup, | |
1630 | .tiocmget = rc_tiocmget, | |
1631 | .tiocmset = rc_tiocmset, | |
1632 | }; | |
1633 | ||
1634 | static inline int rc_init_drivers(void) | |
1635 | { | |
1636 | int error; | |
1637 | int i; | |
1638 | ||
1639 | riscom_driver = alloc_tty_driver(RC_NBOARD * RC_NPORT); | |
1640 | if (!riscom_driver) | |
1641 | return -ENOMEM; | |
1642 | ||
1643 | if (!(tmp_buf = (unsigned char *) get_zeroed_page(GFP_KERNEL))) { | |
1644 | printk(KERN_ERR "rc: Couldn't get free page.\n"); | |
1645 | put_tty_driver(riscom_driver); | |
1646 | return 1; | |
1647 | } | |
1648 | memset(IRQ_to_board, 0, sizeof(IRQ_to_board)); | |
1649 | riscom_driver->owner = THIS_MODULE; | |
1650 | riscom_driver->name = "ttyL"; | |
1651 | riscom_driver->devfs_name = "tts/L"; | |
1652 | riscom_driver->major = RISCOM8_NORMAL_MAJOR; | |
1653 | riscom_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1654 | riscom_driver->subtype = SERIAL_TYPE_NORMAL; | |
1655 | riscom_driver->init_termios = tty_std_termios; | |
1656 | riscom_driver->init_termios.c_cflag = | |
1657 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
1658 | riscom_driver->flags = TTY_DRIVER_REAL_RAW; | |
1659 | tty_set_operations(riscom_driver, &riscom_ops); | |
1660 | if ((error = tty_register_driver(riscom_driver))) { | |
1661 | free_page((unsigned long)tmp_buf); | |
1662 | put_tty_driver(riscom_driver); | |
1663 | printk(KERN_ERR "rc: Couldn't register RISCom/8 driver, " | |
1664 | "error = %d\n", | |
1665 | error); | |
1666 | return 1; | |
1667 | } | |
1668 | ||
1669 | memset(rc_port, 0, sizeof(rc_port)); | |
1670 | for (i = 0; i < RC_NPORT * RC_NBOARD; i++) { | |
1671 | rc_port[i].magic = RISCOM8_MAGIC; | |
1672 | INIT_WORK(&rc_port[i].tqueue, do_softint, &rc_port[i]); | |
1673 | INIT_WORK(&rc_port[i].tqueue_hangup, do_rc_hangup, &rc_port[i]); | |
1674 | rc_port[i].close_delay = 50 * HZ/100; | |
1675 | rc_port[i].closing_wait = 3000 * HZ/100; | |
1676 | init_waitqueue_head(&rc_port[i].open_wait); | |
1677 | init_waitqueue_head(&rc_port[i].close_wait); | |
1678 | } | |
1679 | ||
1680 | return 0; | |
1681 | } | |
1682 | ||
1683 | static void rc_release_drivers(void) | |
1684 | { | |
1685 | unsigned long flags; | |
1686 | ||
1687 | save_flags(flags); | |
1688 | cli(); | |
1689 | free_page((unsigned long)tmp_buf); | |
1690 | tty_unregister_driver(riscom_driver); | |
1691 | put_tty_driver(riscom_driver); | |
1692 | restore_flags(flags); | |
1693 | } | |
1694 | ||
1695 | #ifndef MODULE | |
1696 | /* | |
1697 | * Called at boot time. | |
1698 | * | |
1699 | * You can specify IO base for up to RC_NBOARD cards, | |
1700 | * using line "riscom8=0xiobase1,0xiobase2,.." at LILO prompt. | |
1701 | * Note that there will be no probing at default | |
1702 | * addresses in this case. | |
1703 | * | |
1704 | */ | |
1705 | static int __init riscom8_setup(char *str) | |
1706 | { | |
1707 | int ints[RC_NBOARD]; | |
1708 | int i; | |
1709 | ||
1710 | str = get_options(str, ARRAY_SIZE(ints), ints); | |
1711 | ||
1712 | for (i = 0; i < RC_NBOARD; i++) { | |
1713 | if (i < ints[0]) | |
1714 | rc_board[i].base = ints[i+1]; | |
1715 | else | |
1716 | rc_board[i].base = 0; | |
1717 | } | |
1718 | return 1; | |
1719 | } | |
1720 | ||
1721 | __setup("riscom8=", riscom8_setup); | |
1722 | #endif | |
1723 | ||
1724 | static char banner[] __initdata = | |
1725 | KERN_INFO "rc: SDL RISCom/8 card driver v1.1, (c) D.Gorodchanin " | |
1726 | "1994-1996.\n"; | |
1727 | static char no_boards_msg[] __initdata = | |
1728 | KERN_INFO "rc: No RISCom/8 boards detected.\n"; | |
1729 | ||
1730 | /* | |
1731 | * This routine must be called by kernel at boot time | |
1732 | */ | |
1733 | static int __init riscom8_init(void) | |
1734 | { | |
1735 | int i; | |
1736 | int found = 0; | |
1737 | ||
1738 | printk(banner); | |
1739 | ||
1740 | if (rc_init_drivers()) | |
1741 | return -EIO; | |
1742 | ||
1743 | for (i = 0; i < RC_NBOARD; i++) | |
1744 | if (rc_board[i].base && !rc_probe(&rc_board[i])) | |
1745 | found++; | |
1746 | ||
1747 | if (!found) { | |
1748 | rc_release_drivers(); | |
1749 | printk(no_boards_msg); | |
1750 | return -EIO; | |
1751 | } | |
1752 | return 0; | |
1753 | } | |
1754 | ||
1755 | #ifdef MODULE | |
1756 | static int iobase; | |
1757 | static int iobase1; | |
1758 | static int iobase2; | |
1759 | static int iobase3; | |
1760 | MODULE_PARM(iobase, "i"); | |
1761 | MODULE_PARM(iobase1, "i"); | |
1762 | MODULE_PARM(iobase2, "i"); | |
1763 | MODULE_PARM(iobase3, "i"); | |
1764 | ||
1765 | MODULE_LICENSE("GPL"); | |
1766 | #endif /* MODULE */ | |
1767 | ||
1768 | /* | |
1769 | * You can setup up to 4 boards (current value of RC_NBOARD) | |
1770 | * by specifying "iobase=0xXXX iobase1=0xXXX ..." as insmod parameter. | |
1771 | * | |
1772 | */ | |
1773 | static int __init riscom8_init_module (void) | |
1774 | { | |
1775 | #ifdef MODULE | |
1776 | int i; | |
1777 | ||
1778 | if (iobase || iobase1 || iobase2 || iobase3) { | |
1779 | for(i = 0; i < RC_NBOARD; i++) | |
1780 | rc_board[0].base = 0; | |
1781 | } | |
1782 | ||
1783 | if (iobase) | |
1784 | rc_board[0].base = iobase; | |
1785 | if (iobase1) | |
1786 | rc_board[1].base = iobase1; | |
1787 | if (iobase2) | |
1788 | rc_board[2].base = iobase2; | |
1789 | if (iobase3) | |
1790 | rc_board[3].base = iobase3; | |
1791 | #endif /* MODULE */ | |
1792 | ||
1793 | return riscom8_init(); | |
1794 | } | |
1795 | ||
1796 | static void __exit riscom8_exit_module (void) | |
1797 | { | |
1798 | int i; | |
1799 | ||
1800 | rc_release_drivers(); | |
1801 | for (i = 0; i < RC_NBOARD; i++) | |
1802 | if (rc_board[i].flags & RC_BOARD_PRESENT) | |
1803 | rc_release_io_range(&rc_board[i]); | |
1804 | ||
1805 | } | |
1806 | ||
1807 | module_init(riscom8_init_module); | |
1808 | module_exit(riscom8_exit_module); | |
1809 |