Contents of /alx-src/tags/kernel26-2.6.12-alx-r9/drivers/char/riscom8.c
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
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Wed Mar 4 11:03:09 2009 UTC (15 years, 6 months ago) by niro
File MIME type: text/plain
File size: 45197 byte(s)
Tag kernel26-2.6.12-alx-r9
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 |