Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * linux/drivers/char/riscom.c -- RISCom/8 multiport serial driver. | |
3 | * | |
4 | * Copyright (C) 1994-1996 Dmitry Gorodchanin (pgmdsg@ibi.com) | |
5 | * | |
6 | * This code is loosely based on the Linux serial driver, written by | |
7 | * Linus Torvalds, Theodore T'so and others. The RISCom/8 card | |
8 | * programming info was obtained from various drivers for other OSes | |
9 | * (FreeBSD, ISC, etc), but no source code from those drivers were | |
10 | * directly included in this driver. | |
11 | * | |
12 | * | |
13 | * This program is free software; you can redistribute it and/or modify | |
14 | * it under the terms of the GNU General Public License as published by | |
15 | * the Free Software Foundation; either version 2 of the License, or | |
16 | * (at your option) any later version. | |
17 | * | |
18 | * This program is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
21 | * GNU General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU General Public License | |
24 | * along with this program; if not, write to the Free Software | |
25 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
26 | * | |
27 | * Revision 1.1 | |
28 | * | |
29 | * ChangeLog: | |
30 | * Arnaldo Carvalho de Melo <acme@conectiva.com.br> - 27-Jun-2001 | |
31 | * - get rid of check_region and several cleanups | |
32 | */ | |
33 | ||
34 | #include <linux/module.h> | |
35 | ||
36 | #include <asm/io.h> | |
37 | #include <linux/kernel.h> | |
38 | #include <linux/sched.h> | |
39 | #include <linux/ioport.h> | |
40 | #include <linux/interrupt.h> | |
41 | #include <linux/errno.h> | |
42 | #include <linux/tty.h> | |
43 | #include <linux/mm.h> | |
44 | #include <linux/serial.h> | |
45 | #include <linux/fcntl.h> | |
46 | #include <linux/major.h> | |
47 | #include <linux/init.h> | |
48 | #include <linux/delay.h> | |
33f0f88f | 49 | #include <linux/tty_flip.h> |
d9afa435 | 50 | #include <linux/spinlock.h> |
1da177e4 LT |
51 | |
52 | #include <asm/uaccess.h> | |
53 | ||
54 | #include "riscom8.h" | |
55 | #include "riscom8_reg.h" | |
56 | ||
57 | /* Am I paranoid or not ? ;-) */ | |
58 | #define RISCOM_PARANOIA_CHECK | |
59 | ||
60 | /* | |
61 | * Crazy InteliCom/8 boards sometimes has swapped CTS & DSR signals. | |
62 | * You can slightly speed up things by #undefing the following option, | |
63 | * if you are REALLY sure that your board is correct one. | |
64 | */ | |
65 | ||
66 | #define RISCOM_BRAIN_DAMAGED_CTS | |
67 | ||
68 | /* | |
69 | * The following defines are mostly for testing purposes. But if you need | |
70 | * some nice reporting in your syslog, you can define them also. | |
71 | */ | |
72 | #undef RC_REPORT_FIFO | |
73 | #undef RC_REPORT_OVERRUN | |
74 | ||
75 | ||
76 | #define RISCOM_LEGAL_FLAGS \ | |
77 | (ASYNC_HUP_NOTIFY | ASYNC_SAK | ASYNC_SPLIT_TERMIOS | \ | |
78 | ASYNC_SPD_HI | ASYNC_SPEED_VHI | ASYNC_SESSION_LOCKOUT | \ | |
79 | ASYNC_PGRP_LOCKOUT | ASYNC_CALLOUT_NOHUP) | |
80 | ||
81 | #define RS_EVENT_WRITE_WAKEUP 0 | |
82 | ||
1da177e4 | 83 | static struct tty_driver *riscom_driver; |
1da177e4 | 84 | |
d9afa435 JG |
85 | static DEFINE_SPINLOCK(riscom_lock); |
86 | ||
1da177e4 LT |
87 | static struct riscom_board rc_board[RC_NBOARD] = { |
88 | { | |
89 | .base = RC_IOBASE1, | |
90 | }, | |
91 | { | |
92 | .base = RC_IOBASE2, | |
93 | }, | |
94 | { | |
95 | .base = RC_IOBASE3, | |
96 | }, | |
97 | { | |
98 | .base = RC_IOBASE4, | |
99 | }, | |
100 | }; | |
101 | ||
102 | static struct riscom_port rc_port[RC_NBOARD * RC_NPORT]; | |
103 | ||
104 | /* RISCom/8 I/O ports addresses (without address translation) */ | |
105 | static unsigned short rc_ioport[] = { | |
fe971071 | 106 | #if 1 |
1da177e4 | 107 | 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x09, 0x0a, 0x0b, 0x0c, |
fe971071 | 108 | #else |
1da177e4 LT |
109 | 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x09, 0x0a, 0x0b, 0x0c, 0x10, |
110 | 0x11, 0x12, 0x18, 0x28, 0x31, 0x32, 0x39, 0x3a, 0x40, 0x41, 0x61, 0x62, | |
111 | 0x63, 0x64, 0x6b, 0x70, 0x71, 0x78, 0x7a, 0x7b, 0x7f, 0x100, 0x101 | |
fe971071 | 112 | #endif |
1da177e4 | 113 | }; |
fe971071 | 114 | #define RC_NIOPORT ARRAY_SIZE(rc_ioport) |
1da177e4 LT |
115 | |
116 | ||
117 | static inline int rc_paranoia_check(struct riscom_port const * port, | |
118 | char *name, const char *routine) | |
119 | { | |
120 | #ifdef RISCOM_PARANOIA_CHECK | |
121 | static const char badmagic[] = KERN_INFO | |
122 | "rc: Warning: bad riscom port magic number for device %s in %s\n"; | |
123 | static const char badinfo[] = KERN_INFO | |
124 | "rc: Warning: null riscom port for device %s in %s\n"; | |
125 | ||
126 | if (!port) { | |
127 | printk(badinfo, name, routine); | |
128 | return 1; | |
129 | } | |
130 | if (port->magic != RISCOM8_MAGIC) { | |
131 | printk(badmagic, name, routine); | |
132 | return 1; | |
133 | } | |
134 | #endif | |
135 | return 0; | |
136 | } | |
137 | ||
138 | /* | |
139 | * | |
140 | * Service functions for RISCom/8 driver. | |
141 | * | |
142 | */ | |
143 | ||
144 | /* Get board number from pointer */ | |
145 | static inline int board_No (struct riscom_board const * bp) | |
146 | { | |
147 | return bp - rc_board; | |
148 | } | |
149 | ||
150 | /* Get port number from pointer */ | |
151 | static inline int port_No (struct riscom_port const * port) | |
152 | { | |
153 | return RC_PORT(port - rc_port); | |
154 | } | |
155 | ||
156 | /* Get pointer to board from pointer to port */ | |
157 | static inline struct riscom_board * port_Board(struct riscom_port const * port) | |
158 | { | |
159 | return &rc_board[RC_BOARD(port - rc_port)]; | |
160 | } | |
161 | ||
162 | /* Input Byte from CL CD180 register */ | |
163 | static inline unsigned char rc_in(struct riscom_board const * bp, unsigned short reg) | |
164 | { | |
165 | return inb(bp->base + RC_TO_ISA(reg)); | |
166 | } | |
167 | ||
168 | /* Output Byte to CL CD180 register */ | |
169 | static inline void rc_out(struct riscom_board const * bp, unsigned short reg, | |
170 | unsigned char val) | |
171 | { | |
172 | outb(val, bp->base + RC_TO_ISA(reg)); | |
173 | } | |
174 | ||
175 | /* Wait for Channel Command Register ready */ | |
176 | static inline void rc_wait_CCR(struct riscom_board const * bp) | |
177 | { | |
178 | unsigned long delay; | |
179 | ||
180 | /* FIXME: need something more descriptive then 100000 :) */ | |
181 | for (delay = 100000; delay; delay--) | |
182 | if (!rc_in(bp, CD180_CCR)) | |
183 | return; | |
184 | ||
185 | printk(KERN_INFO "rc%d: Timeout waiting for CCR.\n", board_No(bp)); | |
186 | } | |
187 | ||
188 | /* | |
189 | * RISCom/8 probe functions. | |
190 | */ | |
191 | ||
192 | static inline int rc_request_io_range(struct riscom_board * const bp) | |
193 | { | |
194 | int i; | |
195 | ||
196 | for (i = 0; i < RC_NIOPORT; i++) | |
197 | if (!request_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1, | |
198 | "RISCom/8")) { | |
199 | goto out_release; | |
200 | } | |
201 | return 0; | |
202 | out_release: | |
203 | printk(KERN_INFO "rc%d: Skipping probe at 0x%03x. IO address in use.\n", | |
204 | board_No(bp), bp->base); | |
205 | while(--i >= 0) | |
206 | release_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1); | |
207 | return 1; | |
208 | } | |
209 | ||
210 | static inline void rc_release_io_range(struct riscom_board * const bp) | |
211 | { | |
212 | int i; | |
213 | ||
214 | for (i = 0; i < RC_NIOPORT; i++) | |
215 | release_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1); | |
216 | } | |
217 | ||
1da177e4 LT |
218 | /* Reset and setup CD180 chip */ |
219 | static void __init rc_init_CD180(struct riscom_board const * bp) | |
220 | { | |
221 | unsigned long flags; | |
222 | ||
d9afa435 JG |
223 | spin_lock_irqsave(&riscom_lock, flags); |
224 | ||
1da177e4 LT |
225 | rc_out(bp, RC_CTOUT, 0); /* Clear timeout */ |
226 | rc_wait_CCR(bp); /* Wait for CCR ready */ | |
227 | rc_out(bp, CD180_CCR, CCR_HARDRESET); /* Reset CD180 chip */ | |
d9afa435 | 228 | spin_unlock_irqrestore(&riscom_lock, flags); |
c4ebd927 | 229 | msleep(50); /* Delay 0.05 sec */ |
d9afa435 | 230 | spin_lock_irqsave(&riscom_lock, flags); |
1da177e4 LT |
231 | rc_out(bp, CD180_GIVR, RC_ID); /* Set ID for this chip */ |
232 | rc_out(bp, CD180_GICR, 0); /* Clear all bits */ | |
233 | rc_out(bp, CD180_PILR1, RC_ACK_MINT); /* Prio for modem intr */ | |
234 | rc_out(bp, CD180_PILR2, RC_ACK_TINT); /* Prio for transmitter intr */ | |
235 | rc_out(bp, CD180_PILR3, RC_ACK_RINT); /* Prio for receiver intr */ | |
236 | ||
237 | /* Setting up prescaler. We need 4 ticks per 1 ms */ | |
238 | rc_out(bp, CD180_PPRH, (RC_OSCFREQ/(1000000/RISCOM_TPS)) >> 8); | |
239 | rc_out(bp, CD180_PPRL, (RC_OSCFREQ/(1000000/RISCOM_TPS)) & 0xff); | |
240 | ||
d9afa435 | 241 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
242 | } |
243 | ||
244 | /* Main probing routine, also sets irq. */ | |
245 | static int __init rc_probe(struct riscom_board *bp) | |
246 | { | |
247 | unsigned char val1, val2; | |
248 | int irqs = 0; | |
249 | int retries; | |
250 | ||
251 | bp->irq = 0; | |
252 | ||
253 | if (rc_request_io_range(bp)) | |
254 | return 1; | |
255 | ||
256 | /* Are the I/O ports here ? */ | |
257 | rc_out(bp, CD180_PPRL, 0x5a); | |
258 | outb(0xff, 0x80); | |
259 | val1 = rc_in(bp, CD180_PPRL); | |
260 | rc_out(bp, CD180_PPRL, 0xa5); | |
261 | outb(0x00, 0x80); | |
262 | val2 = rc_in(bp, CD180_PPRL); | |
263 | ||
264 | if ((val1 != 0x5a) || (val2 != 0xa5)) { | |
265 | printk(KERN_ERR "rc%d: RISCom/8 Board at 0x%03x not found.\n", | |
266 | board_No(bp), bp->base); | |
267 | goto out_release; | |
268 | } | |
269 | ||
270 | /* It's time to find IRQ for this board */ | |
271 | for (retries = 0; retries < 5 && irqs <= 0; retries++) { | |
272 | irqs = probe_irq_on(); | |
273 | rc_init_CD180(bp); /* Reset CD180 chip */ | |
274 | rc_out(bp, CD180_CAR, 2); /* Select port 2 */ | |
275 | rc_wait_CCR(bp); | |
276 | rc_out(bp, CD180_CCR, CCR_TXEN); /* Enable transmitter */ | |
277 | rc_out(bp, CD180_IER, IER_TXRDY); /* Enable tx empty intr */ | |
c4ebd927 | 278 | msleep(50); |
1da177e4 LT |
279 | irqs = probe_irq_off(irqs); |
280 | val1 = rc_in(bp, RC_BSR); /* Get Board Status reg */ | |
281 | val2 = rc_in(bp, RC_ACK_TINT); /* ACK interrupt */ | |
282 | rc_init_CD180(bp); /* Reset CD180 again */ | |
283 | ||
284 | if ((val1 & RC_BSR_TINT) || (val2 != (RC_ID | GIVR_IT_TX))) { | |
285 | printk(KERN_ERR "rc%d: RISCom/8 Board at 0x%03x not " | |
286 | "found.\n", board_No(bp), bp->base); | |
287 | goto out_release; | |
288 | } | |
289 | } | |
290 | ||
291 | if (irqs <= 0) { | |
292 | printk(KERN_ERR "rc%d: Can't find IRQ for RISCom/8 board " | |
293 | "at 0x%03x.\n", board_No(bp), bp->base); | |
294 | goto out_release; | |
295 | } | |
296 | bp->irq = irqs; | |
297 | bp->flags |= RC_BOARD_PRESENT; | |
298 | ||
299 | printk(KERN_INFO "rc%d: RISCom/8 Rev. %c board detected at " | |
300 | "0x%03x, IRQ %d.\n", | |
301 | board_No(bp), | |
302 | (rc_in(bp, CD180_GFRCR) & 0x0f) + 'A', /* Board revision */ | |
303 | bp->base, bp->irq); | |
304 | ||
305 | return 0; | |
306 | out_release: | |
307 | rc_release_io_range(bp); | |
308 | return 1; | |
309 | } | |
310 | ||
311 | /* | |
312 | * | |
313 | * Interrupt processing routines. | |
314 | * | |
315 | */ | |
316 | ||
317 | static inline void rc_mark_event(struct riscom_port * port, int event) | |
318 | { | |
319 | set_bit(event, &port->event); | |
320 | schedule_work(&port->tqueue); | |
321 | } | |
322 | ||
323 | static inline struct riscom_port * rc_get_port(struct riscom_board const * bp, | |
324 | unsigned char const * what) | |
325 | { | |
326 | unsigned char channel; | |
327 | struct riscom_port * port; | |
328 | ||
329 | channel = rc_in(bp, CD180_GICR) >> GICR_CHAN_OFF; | |
330 | if (channel < CD180_NCH) { | |
331 | port = &rc_port[board_No(bp) * RC_NPORT + channel]; | |
332 | if (port->flags & ASYNC_INITIALIZED) { | |
333 | return port; | |
334 | } | |
335 | } | |
336 | printk(KERN_ERR "rc%d: %s interrupt from invalid port %d\n", | |
337 | board_No(bp), what, channel); | |
338 | return NULL; | |
339 | } | |
340 | ||
341 | static inline void rc_receive_exc(struct riscom_board const * bp) | |
342 | { | |
343 | struct riscom_port *port; | |
344 | struct tty_struct *tty; | |
345 | unsigned char status; | |
33f0f88f | 346 | unsigned char ch, flag; |
1da177e4 LT |
347 | |
348 | if (!(port = rc_get_port(bp, "Receive"))) | |
349 | return; | |
350 | ||
351 | tty = port->tty; | |
1da177e4 LT |
352 | |
353 | #ifdef RC_REPORT_OVERRUN | |
354 | status = rc_in(bp, CD180_RCSR); | |
33f0f88f | 355 | if (status & RCSR_OE) |
1da177e4 | 356 | port->overrun++; |
1da177e4 LT |
357 | status &= port->mark_mask; |
358 | #else | |
359 | status = rc_in(bp, CD180_RCSR) & port->mark_mask; | |
360 | #endif | |
361 | ch = rc_in(bp, CD180_RDR); | |
362 | if (!status) { | |
363 | return; | |
364 | } | |
365 | if (status & RCSR_TOUT) { | |
366 | printk(KERN_WARNING "rc%d: port %d: Receiver timeout. " | |
367 | "Hardware problems ?\n", | |
368 | board_No(bp), port_No(port)); | |
369 | return; | |
370 | ||
371 | } else if (status & RCSR_BREAK) { | |
372 | printk(KERN_INFO "rc%d: port %d: Handling break...\n", | |
373 | board_No(bp), port_No(port)); | |
33f0f88f | 374 | flag = TTY_BREAK; |
1da177e4 LT |
375 | if (port->flags & ASYNC_SAK) |
376 | do_SAK(tty); | |
377 | ||
378 | } else if (status & RCSR_PE) | |
33f0f88f | 379 | flag = TTY_PARITY; |
1da177e4 LT |
380 | |
381 | else if (status & RCSR_FE) | |
33f0f88f | 382 | flag = TTY_FRAME; |
1da177e4 LT |
383 | |
384 | else if (status & RCSR_OE) | |
33f0f88f | 385 | flag = TTY_OVERRUN; |
1da177e4 LT |
386 | |
387 | else | |
33f0f88f | 388 | flag = TTY_NORMAL; |
1da177e4 | 389 | |
33f0f88f AC |
390 | tty_insert_flip_char(tty, ch, flag); |
391 | tty_flip_buffer_push(tty); | |
1da177e4 LT |
392 | } |
393 | ||
394 | static inline void rc_receive(struct riscom_board const * bp) | |
395 | { | |
396 | struct riscom_port *port; | |
397 | struct tty_struct *tty; | |
398 | unsigned char count; | |
399 | ||
400 | if (!(port = rc_get_port(bp, "Receive"))) | |
401 | return; | |
402 | ||
403 | tty = port->tty; | |
404 | ||
405 | count = rc_in(bp, CD180_RDCR); | |
406 | ||
407 | #ifdef RC_REPORT_FIFO | |
408 | port->hits[count > 8 ? 9 : count]++; | |
409 | #endif | |
410 | ||
411 | while (count--) { | |
33f0f88f | 412 | if (tty_buffer_request_room(tty, 1) == 0) { |
1da177e4 LT |
413 | printk(KERN_WARNING "rc%d: port %d: Working around " |
414 | "flip buffer overflow.\n", | |
415 | board_No(bp), port_No(port)); | |
416 | break; | |
417 | } | |
33f0f88f | 418 | tty_insert_flip_char(tty, rc_in(bp, CD180_RDR), TTY_NORMAL); |
1da177e4 | 419 | } |
33f0f88f | 420 | tty_flip_buffer_push(tty); |
1da177e4 LT |
421 | } |
422 | ||
423 | static inline void rc_transmit(struct riscom_board const * bp) | |
424 | { | |
425 | struct riscom_port *port; | |
426 | struct tty_struct *tty; | |
427 | unsigned char count; | |
428 | ||
429 | ||
430 | if (!(port = rc_get_port(bp, "Transmit"))) | |
431 | return; | |
432 | ||
433 | tty = port->tty; | |
434 | ||
435 | if (port->IER & IER_TXEMPTY) { | |
436 | /* FIFO drained */ | |
437 | rc_out(bp, CD180_CAR, port_No(port)); | |
438 | port->IER &= ~IER_TXEMPTY; | |
439 | rc_out(bp, CD180_IER, port->IER); | |
440 | return; | |
441 | } | |
442 | ||
443 | if ((port->xmit_cnt <= 0 && !port->break_length) | |
444 | || tty->stopped || tty->hw_stopped) { | |
445 | rc_out(bp, CD180_CAR, port_No(port)); | |
446 | port->IER &= ~IER_TXRDY; | |
447 | rc_out(bp, CD180_IER, port->IER); | |
448 | return; | |
449 | } | |
450 | ||
451 | if (port->break_length) { | |
452 | if (port->break_length > 0) { | |
453 | if (port->COR2 & COR2_ETC) { | |
454 | rc_out(bp, CD180_TDR, CD180_C_ESC); | |
455 | rc_out(bp, CD180_TDR, CD180_C_SBRK); | |
456 | port->COR2 &= ~COR2_ETC; | |
457 | } | |
458 | count = min_t(int, port->break_length, 0xff); | |
459 | rc_out(bp, CD180_TDR, CD180_C_ESC); | |
460 | rc_out(bp, CD180_TDR, CD180_C_DELAY); | |
461 | rc_out(bp, CD180_TDR, count); | |
462 | if (!(port->break_length -= count)) | |
463 | port->break_length--; | |
464 | } else { | |
465 | rc_out(bp, CD180_TDR, CD180_C_ESC); | |
466 | rc_out(bp, CD180_TDR, CD180_C_EBRK); | |
467 | rc_out(bp, CD180_COR2, port->COR2); | |
468 | rc_wait_CCR(bp); | |
469 | rc_out(bp, CD180_CCR, CCR_CORCHG2); | |
470 | port->break_length = 0; | |
471 | } | |
472 | return; | |
473 | } | |
474 | ||
475 | count = CD180_NFIFO; | |
476 | do { | |
477 | rc_out(bp, CD180_TDR, port->xmit_buf[port->xmit_tail++]); | |
478 | port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1); | |
479 | if (--port->xmit_cnt <= 0) | |
480 | break; | |
481 | } while (--count > 0); | |
482 | ||
483 | if (port->xmit_cnt <= 0) { | |
484 | rc_out(bp, CD180_CAR, port_No(port)); | |
485 | port->IER &= ~IER_TXRDY; | |
486 | rc_out(bp, CD180_IER, port->IER); | |
487 | } | |
488 | if (port->xmit_cnt <= port->wakeup_chars) | |
489 | rc_mark_event(port, RS_EVENT_WRITE_WAKEUP); | |
490 | } | |
491 | ||
492 | static inline void rc_check_modem(struct riscom_board const * bp) | |
493 | { | |
494 | struct riscom_port *port; | |
495 | struct tty_struct *tty; | |
496 | unsigned char mcr; | |
497 | ||
498 | if (!(port = rc_get_port(bp, "Modem"))) | |
499 | return; | |
500 | ||
501 | tty = port->tty; | |
502 | ||
503 | mcr = rc_in(bp, CD180_MCR); | |
504 | if (mcr & MCR_CDCHG) { | |
505 | if (rc_in(bp, CD180_MSVR) & MSVR_CD) | |
506 | wake_up_interruptible(&port->open_wait); | |
507 | else | |
508 | schedule_work(&port->tqueue_hangup); | |
509 | } | |
510 | ||
511 | #ifdef RISCOM_BRAIN_DAMAGED_CTS | |
512 | if (mcr & MCR_CTSCHG) { | |
513 | if (rc_in(bp, CD180_MSVR) & MSVR_CTS) { | |
514 | tty->hw_stopped = 0; | |
515 | port->IER |= IER_TXRDY; | |
516 | if (port->xmit_cnt <= port->wakeup_chars) | |
517 | rc_mark_event(port, RS_EVENT_WRITE_WAKEUP); | |
518 | } else { | |
519 | tty->hw_stopped = 1; | |
520 | port->IER &= ~IER_TXRDY; | |
521 | } | |
522 | rc_out(bp, CD180_IER, port->IER); | |
523 | } | |
524 | if (mcr & MCR_DSRCHG) { | |
525 | if (rc_in(bp, CD180_MSVR) & MSVR_DSR) { | |
526 | tty->hw_stopped = 0; | |
527 | port->IER |= IER_TXRDY; | |
528 | if (port->xmit_cnt <= port->wakeup_chars) | |
529 | rc_mark_event(port, RS_EVENT_WRITE_WAKEUP); | |
530 | } else { | |
531 | tty->hw_stopped = 1; | |
532 | port->IER &= ~IER_TXRDY; | |
533 | } | |
534 | rc_out(bp, CD180_IER, port->IER); | |
535 | } | |
536 | #endif /* RISCOM_BRAIN_DAMAGED_CTS */ | |
537 | ||
538 | /* Clear change bits */ | |
539 | rc_out(bp, CD180_MCR, 0); | |
540 | } | |
541 | ||
542 | /* The main interrupt processing routine */ | |
f07ef395 | 543 | static irqreturn_t rc_interrupt(int dummy, void * dev_id) |
1da177e4 LT |
544 | { |
545 | unsigned char status; | |
546 | unsigned char ack; | |
f07ef395 | 547 | struct riscom_board *bp = dev_id; |
1da177e4 LT |
548 | unsigned long loop = 0; |
549 | int handled = 0; | |
550 | ||
c7bec5ab | 551 | if (!(bp->flags & RC_BOARD_ACTIVE)) |
1da177e4 | 552 | return IRQ_NONE; |
c7bec5ab | 553 | |
1da177e4 LT |
554 | while ((++loop < 16) && ((status = ~(rc_in(bp, RC_BSR))) & |
555 | (RC_BSR_TOUT | RC_BSR_TINT | | |
556 | RC_BSR_MINT | RC_BSR_RINT))) { | |
557 | handled = 1; | |
558 | if (status & RC_BSR_TOUT) | |
559 | printk(KERN_WARNING "rc%d: Got timeout. Hardware " | |
560 | "error?\n", board_No(bp)); | |
561 | ||
562 | else if (status & RC_BSR_RINT) { | |
563 | ack = rc_in(bp, RC_ACK_RINT); | |
564 | ||
565 | if (ack == (RC_ID | GIVR_IT_RCV)) | |
566 | rc_receive(bp); | |
567 | else if (ack == (RC_ID | GIVR_IT_REXC)) | |
568 | rc_receive_exc(bp); | |
569 | else | |
570 | printk(KERN_WARNING "rc%d: Bad receive ack " | |
571 | "0x%02x.\n", | |
572 | board_No(bp), ack); | |
573 | ||
574 | } else if (status & RC_BSR_TINT) { | |
575 | ack = rc_in(bp, RC_ACK_TINT); | |
576 | ||
577 | if (ack == (RC_ID | GIVR_IT_TX)) | |
578 | rc_transmit(bp); | |
579 | else | |
580 | printk(KERN_WARNING "rc%d: Bad transmit ack " | |
581 | "0x%02x.\n", | |
582 | board_No(bp), ack); | |
583 | ||
584 | } else /* if (status & RC_BSR_MINT) */ { | |
585 | ack = rc_in(bp, RC_ACK_MINT); | |
586 | ||
587 | if (ack == (RC_ID | GIVR_IT_MODEM)) | |
588 | rc_check_modem(bp); | |
589 | else | |
590 | printk(KERN_WARNING "rc%d: Bad modem ack " | |
591 | "0x%02x.\n", | |
592 | board_No(bp), ack); | |
593 | ||
594 | } | |
595 | ||
596 | rc_out(bp, CD180_EOIR, 0); /* Mark end of interrupt */ | |
597 | rc_out(bp, RC_CTOUT, 0); /* Clear timeout flag */ | |
598 | } | |
599 | return IRQ_RETVAL(handled); | |
600 | } | |
601 | ||
602 | /* | |
603 | * Routines for open & close processing. | |
604 | */ | |
605 | ||
606 | /* Called with disabled interrupts */ | |
f07ef395 | 607 | static int rc_setup_board(struct riscom_board * bp) |
1da177e4 LT |
608 | { |
609 | int error; | |
610 | ||
611 | if (bp->flags & RC_BOARD_ACTIVE) | |
612 | return 0; | |
613 | ||
0f2ed4c6 | 614 | error = request_irq(bp->irq, rc_interrupt, IRQF_DISABLED, |
f07ef395 | 615 | "RISCom/8", bp); |
1da177e4 LT |
616 | if (error) |
617 | return error; | |
618 | ||
619 | rc_out(bp, RC_CTOUT, 0); /* Just in case */ | |
620 | bp->DTR = ~0; | |
621 | rc_out(bp, RC_DTR, bp->DTR); /* Drop DTR on all ports */ | |
622 | ||
1da177e4 LT |
623 | bp->flags |= RC_BOARD_ACTIVE; |
624 | ||
625 | return 0; | |
626 | } | |
627 | ||
628 | /* Called with disabled interrupts */ | |
f07ef395 | 629 | static void rc_shutdown_board(struct riscom_board *bp) |
1da177e4 LT |
630 | { |
631 | if (!(bp->flags & RC_BOARD_ACTIVE)) | |
632 | return; | |
633 | ||
634 | bp->flags &= ~RC_BOARD_ACTIVE; | |
635 | ||
636 | free_irq(bp->irq, NULL); | |
1da177e4 LT |
637 | |
638 | bp->DTR = ~0; | |
639 | rc_out(bp, RC_DTR, bp->DTR); /* Drop DTR on all ports */ | |
640 | ||
641 | } | |
642 | ||
643 | /* | |
644 | * Setting up port characteristics. | |
645 | * Must be called with disabled interrupts | |
646 | */ | |
647 | static void rc_change_speed(struct riscom_board *bp, struct riscom_port *port) | |
648 | { | |
649 | struct tty_struct *tty; | |
650 | unsigned long baud; | |
651 | long tmp; | |
652 | unsigned char cor1 = 0, cor3 = 0; | |
653 | unsigned char mcor1 = 0, mcor2 = 0; | |
654 | ||
655 | if (!(tty = port->tty) || !tty->termios) | |
656 | return; | |
657 | ||
658 | port->IER = 0; | |
659 | port->COR2 = 0; | |
660 | port->MSVR = MSVR_RTS; | |
661 | ||
c7bce309 | 662 | baud = tty_get_baud_rate(tty); |
1da177e4 LT |
663 | |
664 | /* Select port on the board */ | |
665 | rc_out(bp, CD180_CAR, port_No(port)); | |
666 | ||
c7bce309 | 667 | if (!baud) { |
1da177e4 LT |
668 | /* Drop DTR & exit */ |
669 | bp->DTR |= (1u << port_No(port)); | |
670 | rc_out(bp, RC_DTR, bp->DTR); | |
671 | return; | |
672 | } else { | |
673 | /* Set DTR on */ | |
674 | bp->DTR &= ~(1u << port_No(port)); | |
675 | rc_out(bp, RC_DTR, bp->DTR); | |
676 | } | |
677 | ||
678 | /* | |
679 | * Now we must calculate some speed depended things | |
680 | */ | |
681 | ||
682 | /* Set baud rate for port */ | |
c7bce309 | 683 | tmp = (((RC_OSCFREQ + baud/2) / baud + |
1da177e4 LT |
684 | CD180_TPC/2) / CD180_TPC); |
685 | ||
686 | rc_out(bp, CD180_RBPRH, (tmp >> 8) & 0xff); | |
687 | rc_out(bp, CD180_TBPRH, (tmp >> 8) & 0xff); | |
688 | rc_out(bp, CD180_RBPRL, tmp & 0xff); | |
689 | rc_out(bp, CD180_TBPRL, tmp & 0xff); | |
690 | ||
c7bce309 | 691 | baud = (baud + 5) / 10; /* Estimated CPS */ |
1da177e4 LT |
692 | |
693 | /* Two timer ticks seems enough to wakeup something like SLIP driver */ | |
694 | tmp = ((baud + HZ/2) / HZ) * 2 - CD180_NFIFO; | |
695 | port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ? | |
696 | SERIAL_XMIT_SIZE - 1 : tmp); | |
697 | ||
698 | /* Receiver timeout will be transmission time for 1.5 chars */ | |
699 | tmp = (RISCOM_TPS + RISCOM_TPS/2 + baud/2) / baud; | |
700 | tmp = (tmp > 0xff) ? 0xff : tmp; | |
701 | rc_out(bp, CD180_RTPR, tmp); | |
702 | ||
703 | switch (C_CSIZE(tty)) { | |
704 | case CS5: | |
705 | cor1 |= COR1_5BITS; | |
706 | break; | |
707 | case CS6: | |
708 | cor1 |= COR1_6BITS; | |
709 | break; | |
710 | case CS7: | |
711 | cor1 |= COR1_7BITS; | |
712 | break; | |
713 | case CS8: | |
714 | cor1 |= COR1_8BITS; | |
715 | break; | |
716 | } | |
717 | ||
718 | if (C_CSTOPB(tty)) | |
719 | cor1 |= COR1_2SB; | |
720 | ||
721 | cor1 |= COR1_IGNORE; | |
722 | if (C_PARENB(tty)) { | |
723 | cor1 |= COR1_NORMPAR; | |
724 | if (C_PARODD(tty)) | |
725 | cor1 |= COR1_ODDP; | |
726 | if (I_INPCK(tty)) | |
727 | cor1 &= ~COR1_IGNORE; | |
728 | } | |
729 | /* Set marking of some errors */ | |
730 | port->mark_mask = RCSR_OE | RCSR_TOUT; | |
731 | if (I_INPCK(tty)) | |
732 | port->mark_mask |= RCSR_FE | RCSR_PE; | |
733 | if (I_BRKINT(tty) || I_PARMRK(tty)) | |
734 | port->mark_mask |= RCSR_BREAK; | |
735 | if (I_IGNPAR(tty)) | |
736 | port->mark_mask &= ~(RCSR_FE | RCSR_PE); | |
737 | if (I_IGNBRK(tty)) { | |
738 | port->mark_mask &= ~RCSR_BREAK; | |
739 | if (I_IGNPAR(tty)) | |
740 | /* Real raw mode. Ignore all */ | |
741 | port->mark_mask &= ~RCSR_OE; | |
742 | } | |
743 | /* Enable Hardware Flow Control */ | |
744 | if (C_CRTSCTS(tty)) { | |
745 | #ifdef RISCOM_BRAIN_DAMAGED_CTS | |
746 | port->IER |= IER_DSR | IER_CTS; | |
747 | mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD; | |
748 | mcor2 |= MCOR2_DSROD | MCOR2_CTSOD; | |
749 | tty->hw_stopped = !(rc_in(bp, CD180_MSVR) & (MSVR_CTS|MSVR_DSR)); | |
750 | #else | |
751 | port->COR2 |= COR2_CTSAE; | |
752 | #endif | |
753 | } | |
754 | /* Enable Software Flow Control. FIXME: I'm not sure about this */ | |
755 | /* Some people reported that it works, but I still doubt */ | |
756 | if (I_IXON(tty)) { | |
757 | port->COR2 |= COR2_TXIBE; | |
758 | cor3 |= (COR3_FCT | COR3_SCDE); | |
759 | if (I_IXANY(tty)) | |
760 | port->COR2 |= COR2_IXM; | |
761 | rc_out(bp, CD180_SCHR1, START_CHAR(tty)); | |
762 | rc_out(bp, CD180_SCHR2, STOP_CHAR(tty)); | |
763 | rc_out(bp, CD180_SCHR3, START_CHAR(tty)); | |
764 | rc_out(bp, CD180_SCHR4, STOP_CHAR(tty)); | |
765 | } | |
766 | if (!C_CLOCAL(tty)) { | |
767 | /* Enable CD check */ | |
768 | port->IER |= IER_CD; | |
769 | mcor1 |= MCOR1_CDZD; | |
770 | mcor2 |= MCOR2_CDOD; | |
771 | } | |
772 | ||
773 | if (C_CREAD(tty)) | |
774 | /* Enable receiver */ | |
775 | port->IER |= IER_RXD; | |
776 | ||
777 | /* Set input FIFO size (1-8 bytes) */ | |
778 | cor3 |= RISCOM_RXFIFO; | |
779 | /* Setting up CD180 channel registers */ | |
780 | rc_out(bp, CD180_COR1, cor1); | |
781 | rc_out(bp, CD180_COR2, port->COR2); | |
782 | rc_out(bp, CD180_COR3, cor3); | |
783 | /* Make CD180 know about registers change */ | |
784 | rc_wait_CCR(bp); | |
785 | rc_out(bp, CD180_CCR, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3); | |
786 | /* Setting up modem option registers */ | |
787 | rc_out(bp, CD180_MCOR1, mcor1); | |
788 | rc_out(bp, CD180_MCOR2, mcor2); | |
789 | /* Enable CD180 transmitter & receiver */ | |
790 | rc_wait_CCR(bp); | |
791 | rc_out(bp, CD180_CCR, CCR_TXEN | CCR_RXEN); | |
792 | /* Enable interrupts */ | |
793 | rc_out(bp, CD180_IER, port->IER); | |
794 | /* And finally set RTS on */ | |
795 | rc_out(bp, CD180_MSVR, port->MSVR); | |
796 | } | |
797 | ||
798 | /* Must be called with interrupts enabled */ | |
799 | static int rc_setup_port(struct riscom_board *bp, struct riscom_port *port) | |
800 | { | |
801 | unsigned long flags; | |
802 | ||
803 | if (port->flags & ASYNC_INITIALIZED) | |
804 | return 0; | |
805 | ||
806 | if (!port->xmit_buf) { | |
807 | /* We may sleep in get_zeroed_page() */ | |
808 | unsigned long tmp; | |
809 | ||
810 | if (!(tmp = get_zeroed_page(GFP_KERNEL))) | |
811 | return -ENOMEM; | |
812 | ||
813 | if (port->xmit_buf) { | |
814 | free_page(tmp); | |
815 | return -ERESTARTSYS; | |
816 | } | |
817 | port->xmit_buf = (unsigned char *) tmp; | |
818 | } | |
d9afa435 JG |
819 | |
820 | spin_lock_irqsave(&riscom_lock, flags); | |
821 | ||
1da177e4 LT |
822 | if (port->tty) |
823 | clear_bit(TTY_IO_ERROR, &port->tty->flags); | |
824 | ||
825 | if (port->count == 1) | |
826 | bp->count++; | |
827 | ||
828 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; | |
829 | rc_change_speed(bp, port); | |
830 | port->flags |= ASYNC_INITIALIZED; | |
831 | ||
d9afa435 | 832 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
833 | return 0; |
834 | } | |
835 | ||
836 | /* Must be called with interrupts disabled */ | |
837 | static void rc_shutdown_port(struct riscom_board *bp, struct riscom_port *port) | |
838 | { | |
839 | struct tty_struct *tty; | |
840 | ||
841 | if (!(port->flags & ASYNC_INITIALIZED)) | |
842 | return; | |
843 | ||
844 | #ifdef RC_REPORT_OVERRUN | |
845 | printk(KERN_INFO "rc%d: port %d: Total %ld overruns were detected.\n", | |
846 | board_No(bp), port_No(port), port->overrun); | |
847 | #endif | |
848 | #ifdef RC_REPORT_FIFO | |
849 | { | |
850 | int i; | |
851 | ||
852 | printk(KERN_INFO "rc%d: port %d: FIFO hits [ ", | |
853 | board_No(bp), port_No(port)); | |
854 | for (i = 0; i < 10; i++) { | |
855 | printk("%ld ", port->hits[i]); | |
856 | } | |
857 | printk("].\n"); | |
858 | } | |
859 | #endif | |
860 | if (port->xmit_buf) { | |
861 | free_page((unsigned long) port->xmit_buf); | |
862 | port->xmit_buf = NULL; | |
863 | } | |
864 | ||
865 | if (!(tty = port->tty) || C_HUPCL(tty)) { | |
866 | /* Drop DTR */ | |
867 | bp->DTR |= (1u << port_No(port)); | |
868 | rc_out(bp, RC_DTR, bp->DTR); | |
869 | } | |
870 | ||
871 | /* Select port */ | |
872 | rc_out(bp, CD180_CAR, port_No(port)); | |
873 | /* Reset port */ | |
874 | rc_wait_CCR(bp); | |
875 | rc_out(bp, CD180_CCR, CCR_SOFTRESET); | |
876 | /* Disable all interrupts from this port */ | |
877 | port->IER = 0; | |
878 | rc_out(bp, CD180_IER, port->IER); | |
879 | ||
880 | if (tty) | |
881 | set_bit(TTY_IO_ERROR, &tty->flags); | |
882 | port->flags &= ~ASYNC_INITIALIZED; | |
883 | ||
884 | if (--bp->count < 0) { | |
885 | printk(KERN_INFO "rc%d: rc_shutdown_port: " | |
886 | "bad board count: %d\n", | |
887 | board_No(bp), bp->count); | |
888 | bp->count = 0; | |
889 | } | |
890 | ||
891 | /* | |
892 | * If this is the last opened port on the board | |
893 | * shutdown whole board | |
894 | */ | |
895 | if (!bp->count) | |
896 | rc_shutdown_board(bp); | |
897 | } | |
898 | ||
899 | ||
900 | static int block_til_ready(struct tty_struct *tty, struct file * filp, | |
901 | struct riscom_port *port) | |
902 | { | |
903 | DECLARE_WAITQUEUE(wait, current); | |
904 | struct riscom_board *bp = port_Board(port); | |
905 | int retval; | |
906 | int do_clocal = 0; | |
907 | int CD; | |
d9afa435 | 908 | unsigned long flags; |
1da177e4 LT |
909 | |
910 | /* | |
911 | * If the device is in the middle of being closed, then block | |
912 | * until it's done, and then try again. | |
913 | */ | |
914 | if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { | |
915 | interruptible_sleep_on(&port->close_wait); | |
916 | if (port->flags & ASYNC_HUP_NOTIFY) | |
917 | return -EAGAIN; | |
918 | else | |
919 | return -ERESTARTSYS; | |
920 | } | |
921 | ||
922 | /* | |
923 | * If non-blocking mode is set, or the port is not enabled, | |
924 | * then make the check up front and then exit. | |
925 | */ | |
926 | if ((filp->f_flags & O_NONBLOCK) || | |
927 | (tty->flags & (1 << TTY_IO_ERROR))) { | |
928 | port->flags |= ASYNC_NORMAL_ACTIVE; | |
929 | return 0; | |
930 | } | |
931 | ||
932 | if (C_CLOCAL(tty)) | |
933 | do_clocal = 1; | |
934 | ||
935 | /* | |
936 | * Block waiting for the carrier detect and the line to become | |
937 | * free (i.e., not in use by the callout). While we are in | |
938 | * this loop, info->count is dropped by one, so that | |
939 | * rs_close() knows when to free things. We restore it upon | |
940 | * exit, either normal or abnormal. | |
941 | */ | |
942 | retval = 0; | |
943 | add_wait_queue(&port->open_wait, &wait); | |
d9afa435 JG |
944 | |
945 | spin_lock_irqsave(&riscom_lock, flags); | |
946 | ||
1da177e4 LT |
947 | if (!tty_hung_up_p(filp)) |
948 | port->count--; | |
d9afa435 JG |
949 | |
950 | spin_unlock_irqrestore(&riscom_lock, flags); | |
951 | ||
1da177e4 LT |
952 | port->blocked_open++; |
953 | while (1) { | |
d9afa435 JG |
954 | spin_lock_irqsave(&riscom_lock, flags); |
955 | ||
1da177e4 LT |
956 | rc_out(bp, CD180_CAR, port_No(port)); |
957 | CD = rc_in(bp, CD180_MSVR) & MSVR_CD; | |
958 | rc_out(bp, CD180_MSVR, MSVR_RTS); | |
959 | bp->DTR &= ~(1u << port_No(port)); | |
960 | rc_out(bp, RC_DTR, bp->DTR); | |
d9afa435 JG |
961 | |
962 | spin_unlock_irqrestore(&riscom_lock, flags); | |
963 | ||
1da177e4 LT |
964 | set_current_state(TASK_INTERRUPTIBLE); |
965 | if (tty_hung_up_p(filp) || | |
966 | !(port->flags & ASYNC_INITIALIZED)) { | |
967 | if (port->flags & ASYNC_HUP_NOTIFY) | |
968 | retval = -EAGAIN; | |
969 | else | |
970 | retval = -ERESTARTSYS; | |
971 | break; | |
972 | } | |
973 | if (!(port->flags & ASYNC_CLOSING) && | |
974 | (do_clocal || CD)) | |
975 | break; | |
976 | if (signal_pending(current)) { | |
977 | retval = -ERESTARTSYS; | |
978 | break; | |
979 | } | |
980 | schedule(); | |
981 | } | |
cc0a8fbb | 982 | __set_current_state(TASK_RUNNING); |
1da177e4 LT |
983 | remove_wait_queue(&port->open_wait, &wait); |
984 | if (!tty_hung_up_p(filp)) | |
985 | port->count++; | |
986 | port->blocked_open--; | |
987 | if (retval) | |
988 | return retval; | |
989 | ||
990 | port->flags |= ASYNC_NORMAL_ACTIVE; | |
991 | return 0; | |
992 | } | |
993 | ||
994 | static int rc_open(struct tty_struct * tty, struct file * filp) | |
995 | { | |
996 | int board; | |
997 | int error; | |
998 | struct riscom_port * port; | |
999 | struct riscom_board * bp; | |
1000 | ||
1001 | board = RC_BOARD(tty->index); | |
1002 | if (board >= RC_NBOARD || !(rc_board[board].flags & RC_BOARD_PRESENT)) | |
1003 | return -ENODEV; | |
1004 | ||
1005 | bp = &rc_board[board]; | |
1006 | port = rc_port + board * RC_NPORT + RC_PORT(tty->index); | |
1007 | if (rc_paranoia_check(port, tty->name, "rc_open")) | |
1008 | return -ENODEV; | |
1009 | ||
1010 | if ((error = rc_setup_board(bp))) | |
1011 | return error; | |
1012 | ||
1013 | port->count++; | |
1014 | tty->driver_data = port; | |
1015 | port->tty = tty; | |
1016 | ||
1017 | if ((error = rc_setup_port(bp, port))) | |
1018 | return error; | |
1019 | ||
1020 | if ((error = block_til_ready(tty, filp, port))) | |
1021 | return error; | |
1022 | ||
1023 | return 0; | |
1024 | } | |
1025 | ||
1026 | static void rc_close(struct tty_struct * tty, struct file * filp) | |
1027 | { | |
1028 | struct riscom_port *port = (struct riscom_port *) tty->driver_data; | |
1029 | struct riscom_board *bp; | |
1030 | unsigned long flags; | |
1031 | unsigned long timeout; | |
1032 | ||
1033 | if (!port || rc_paranoia_check(port, tty->name, "close")) | |
1034 | return; | |
d9afa435 JG |
1035 | |
1036 | spin_lock_irqsave(&riscom_lock, flags); | |
1037 | ||
1da177e4 LT |
1038 | if (tty_hung_up_p(filp)) |
1039 | goto out; | |
1040 | ||
1041 | bp = port_Board(port); | |
1042 | if ((tty->count == 1) && (port->count != 1)) { | |
1043 | printk(KERN_INFO "rc%d: rc_close: bad port count;" | |
1044 | " tty->count is 1, port count is %d\n", | |
1045 | board_No(bp), port->count); | |
1046 | port->count = 1; | |
1047 | } | |
1048 | if (--port->count < 0) { | |
1049 | printk(KERN_INFO "rc%d: rc_close: bad port count " | |
1050 | "for tty%d: %d\n", | |
1051 | board_No(bp), port_No(port), port->count); | |
1052 | port->count = 0; | |
1053 | } | |
1054 | if (port->count) | |
1055 | goto out; | |
1056 | port->flags |= ASYNC_CLOSING; | |
1057 | /* | |
1058 | * Now we wait for the transmit buffer to clear; and we notify | |
1059 | * the line discipline to only process XON/XOFF characters. | |
1060 | */ | |
1061 | tty->closing = 1; | |
1062 | if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) | |
1063 | tty_wait_until_sent(tty, port->closing_wait); | |
1064 | /* | |
1065 | * At this point we stop accepting input. To do this, we | |
1066 | * disable the receive line status interrupts, and tell the | |
1067 | * interrupt driver to stop checking the data ready bit in the | |
1068 | * line status register. | |
1069 | */ | |
1070 | port->IER &= ~IER_RXD; | |
1071 | if (port->flags & ASYNC_INITIALIZED) { | |
1072 | port->IER &= ~IER_TXRDY; | |
1073 | port->IER |= IER_TXEMPTY; | |
1074 | rc_out(bp, CD180_CAR, port_No(port)); | |
1075 | rc_out(bp, CD180_IER, port->IER); | |
1076 | /* | |
1077 | * Before we drop DTR, make sure the UART transmitter | |
1078 | * has completely drained; this is especially | |
1079 | * important if there is a transmit FIFO! | |
1080 | */ | |
1081 | timeout = jiffies+HZ; | |
1082 | while(port->IER & IER_TXEMPTY) { | |
1083 | msleep_interruptible(jiffies_to_msecs(port->timeout)); | |
1084 | if (time_after(jiffies, timeout)) | |
1085 | break; | |
1086 | } | |
1087 | } | |
1088 | rc_shutdown_port(bp, port); | |
1089 | if (tty->driver->flush_buffer) | |
1090 | tty->driver->flush_buffer(tty); | |
1091 | tty_ldisc_flush(tty); | |
1092 | ||
1093 | tty->closing = 0; | |
1094 | port->event = 0; | |
1095 | port->tty = NULL; | |
1096 | if (port->blocked_open) { | |
1097 | if (port->close_delay) { | |
1098 | msleep_interruptible(jiffies_to_msecs(port->close_delay)); | |
1099 | } | |
1100 | wake_up_interruptible(&port->open_wait); | |
1101 | } | |
1102 | port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); | |
1103 | wake_up_interruptible(&port->close_wait); | |
d9afa435 JG |
1104 | |
1105 | out: | |
1106 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
1107 | } |
1108 | ||
1109 | static int rc_write(struct tty_struct * tty, | |
1110 | const unsigned char *buf, int count) | |
1111 | { | |
1112 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1113 | struct riscom_board *bp; | |
1114 | int c, total = 0; | |
1115 | unsigned long flags; | |
1116 | ||
1117 | if (rc_paranoia_check(port, tty->name, "rc_write")) | |
1118 | return 0; | |
1119 | ||
1120 | bp = port_Board(port); | |
1121 | ||
b3218a79 | 1122 | if (!tty || !port->xmit_buf) |
1da177e4 LT |
1123 | return 0; |
1124 | ||
1da177e4 | 1125 | while (1) { |
d9afa435 JG |
1126 | spin_lock_irqsave(&riscom_lock, flags); |
1127 | ||
1da177e4 LT |
1128 | c = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1, |
1129 | SERIAL_XMIT_SIZE - port->xmit_head)); | |
d9afa435 JG |
1130 | if (c <= 0) |
1131 | break; /* lock continues to be held */ | |
1da177e4 LT |
1132 | |
1133 | memcpy(port->xmit_buf + port->xmit_head, buf, c); | |
1134 | port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1); | |
1135 | port->xmit_cnt += c; | |
d9afa435 JG |
1136 | |
1137 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
1138 | |
1139 | buf += c; | |
1140 | count -= c; | |
1141 | total += c; | |
1142 | } | |
1143 | ||
1da177e4 LT |
1144 | if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped && |
1145 | !(port->IER & IER_TXRDY)) { | |
1146 | port->IER |= IER_TXRDY; | |
1147 | rc_out(bp, CD180_CAR, port_No(port)); | |
1148 | rc_out(bp, CD180_IER, port->IER); | |
1149 | } | |
d9afa435 JG |
1150 | |
1151 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
1152 | |
1153 | return total; | |
1154 | } | |
1155 | ||
1156 | static void rc_put_char(struct tty_struct * tty, unsigned char ch) | |
1157 | { | |
1158 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1159 | unsigned long flags; | |
1160 | ||
1161 | if (rc_paranoia_check(port, tty->name, "rc_put_char")) | |
1162 | return; | |
1163 | ||
1164 | if (!tty || !port->xmit_buf) | |
1165 | return; | |
1166 | ||
d9afa435 | 1167 | spin_lock_irqsave(&riscom_lock, flags); |
1da177e4 LT |
1168 | |
1169 | if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) | |
1170 | goto out; | |
1171 | ||
1172 | port->xmit_buf[port->xmit_head++] = ch; | |
1173 | port->xmit_head &= SERIAL_XMIT_SIZE - 1; | |
1174 | port->xmit_cnt++; | |
d9afa435 JG |
1175 | |
1176 | out: | |
1177 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
1178 | } |
1179 | ||
1180 | static void rc_flush_chars(struct tty_struct * tty) | |
1181 | { | |
1182 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1183 | unsigned long flags; | |
1184 | ||
1185 | if (rc_paranoia_check(port, tty->name, "rc_flush_chars")) | |
1186 | return; | |
1187 | ||
1188 | if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || | |
1189 | !port->xmit_buf) | |
1190 | return; | |
1191 | ||
d9afa435 JG |
1192 | spin_lock_irqsave(&riscom_lock, flags); |
1193 | ||
1da177e4 LT |
1194 | port->IER |= IER_TXRDY; |
1195 | rc_out(port_Board(port), CD180_CAR, port_No(port)); | |
1196 | rc_out(port_Board(port), CD180_IER, port->IER); | |
d9afa435 JG |
1197 | |
1198 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
1199 | } |
1200 | ||
1201 | static int rc_write_room(struct tty_struct * tty) | |
1202 | { | |
1203 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1204 | int ret; | |
1205 | ||
1206 | if (rc_paranoia_check(port, tty->name, "rc_write_room")) | |
1207 | return 0; | |
1208 | ||
1209 | ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; | |
1210 | if (ret < 0) | |
1211 | ret = 0; | |
1212 | return ret; | |
1213 | } | |
1214 | ||
1215 | static int rc_chars_in_buffer(struct tty_struct *tty) | |
1216 | { | |
1217 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1218 | ||
1219 | if (rc_paranoia_check(port, tty->name, "rc_chars_in_buffer")) | |
1220 | return 0; | |
1221 | ||
1222 | return port->xmit_cnt; | |
1223 | } | |
1224 | ||
1225 | static void rc_flush_buffer(struct tty_struct *tty) | |
1226 | { | |
1227 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1228 | unsigned long flags; | |
1229 | ||
1230 | if (rc_paranoia_check(port, tty->name, "rc_flush_buffer")) | |
1231 | return; | |
1232 | ||
d9afa435 JG |
1233 | spin_lock_irqsave(&riscom_lock, flags); |
1234 | ||
1da177e4 | 1235 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; |
d9afa435 JG |
1236 | |
1237 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 | 1238 | |
1da177e4 LT |
1239 | tty_wakeup(tty); |
1240 | } | |
1241 | ||
1242 | static int rc_tiocmget(struct tty_struct *tty, struct file *file) | |
1243 | { | |
1244 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1245 | struct riscom_board * bp; | |
1246 | unsigned char status; | |
1247 | unsigned int result; | |
1248 | unsigned long flags; | |
1249 | ||
1250 | if (rc_paranoia_check(port, tty->name, __FUNCTION__)) | |
1251 | return -ENODEV; | |
1252 | ||
1253 | bp = port_Board(port); | |
d9afa435 JG |
1254 | |
1255 | spin_lock_irqsave(&riscom_lock, flags); | |
1256 | ||
1da177e4 LT |
1257 | rc_out(bp, CD180_CAR, port_No(port)); |
1258 | status = rc_in(bp, CD180_MSVR); | |
1259 | result = rc_in(bp, RC_RI) & (1u << port_No(port)) ? 0 : TIOCM_RNG; | |
d9afa435 JG |
1260 | |
1261 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1262 | ||
1da177e4 LT |
1263 | result |= ((status & MSVR_RTS) ? TIOCM_RTS : 0) |
1264 | | ((status & MSVR_DTR) ? TIOCM_DTR : 0) | |
1265 | | ((status & MSVR_CD) ? TIOCM_CAR : 0) | |
1266 | | ((status & MSVR_DSR) ? TIOCM_DSR : 0) | |
1267 | | ((status & MSVR_CTS) ? TIOCM_CTS : 0); | |
1268 | return result; | |
1269 | } | |
1270 | ||
1271 | static int rc_tiocmset(struct tty_struct *tty, struct file *file, | |
1272 | unsigned int set, unsigned int clear) | |
1273 | { | |
1274 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1275 | unsigned long flags; | |
1276 | struct riscom_board *bp; | |
1277 | ||
1278 | if (rc_paranoia_check(port, tty->name, __FUNCTION__)) | |
1279 | return -ENODEV; | |
1280 | ||
1281 | bp = port_Board(port); | |
1282 | ||
d9afa435 JG |
1283 | spin_lock_irqsave(&riscom_lock, flags); |
1284 | ||
1da177e4 LT |
1285 | if (set & TIOCM_RTS) |
1286 | port->MSVR |= MSVR_RTS; | |
1287 | if (set & TIOCM_DTR) | |
1288 | bp->DTR &= ~(1u << port_No(port)); | |
1289 | ||
1290 | if (clear & TIOCM_RTS) | |
1291 | port->MSVR &= ~MSVR_RTS; | |
1292 | if (clear & TIOCM_DTR) | |
1293 | bp->DTR |= (1u << port_No(port)); | |
1294 | ||
1295 | rc_out(bp, CD180_CAR, port_No(port)); | |
1296 | rc_out(bp, CD180_MSVR, port->MSVR); | |
1297 | rc_out(bp, RC_DTR, bp->DTR); | |
d9afa435 JG |
1298 | |
1299 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1300 | ||
1da177e4 LT |
1301 | return 0; |
1302 | } | |
1303 | ||
1304 | static inline void rc_send_break(struct riscom_port * port, unsigned long length) | |
1305 | { | |
1306 | struct riscom_board *bp = port_Board(port); | |
1307 | unsigned long flags; | |
1308 | ||
d9afa435 JG |
1309 | spin_lock_irqsave(&riscom_lock, flags); |
1310 | ||
1da177e4 LT |
1311 | port->break_length = RISCOM_TPS / HZ * length; |
1312 | port->COR2 |= COR2_ETC; | |
1313 | port->IER |= IER_TXRDY; | |
1314 | rc_out(bp, CD180_CAR, port_No(port)); | |
1315 | rc_out(bp, CD180_COR2, port->COR2); | |
1316 | rc_out(bp, CD180_IER, port->IER); | |
1317 | rc_wait_CCR(bp); | |
1318 | rc_out(bp, CD180_CCR, CCR_CORCHG2); | |
1319 | rc_wait_CCR(bp); | |
d9afa435 JG |
1320 | |
1321 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
1322 | } |
1323 | ||
1324 | static inline int rc_set_serial_info(struct riscom_port * port, | |
1325 | struct serial_struct __user * newinfo) | |
1326 | { | |
1327 | struct serial_struct tmp; | |
1328 | struct riscom_board *bp = port_Board(port); | |
1329 | int change_speed; | |
1da177e4 LT |
1330 | |
1331 | if (copy_from_user(&tmp, newinfo, sizeof(tmp))) | |
1332 | return -EFAULT; | |
1333 | ||
1334 | #if 0 | |
1335 | if ((tmp.irq != bp->irq) || | |
1336 | (tmp.port != bp->base) || | |
1337 | (tmp.type != PORT_CIRRUS) || | |
1338 | (tmp.baud_base != (RC_OSCFREQ + CD180_TPC/2) / CD180_TPC) || | |
1339 | (tmp.custom_divisor != 0) || | |
1340 | (tmp.xmit_fifo_size != CD180_NFIFO) || | |
1341 | (tmp.flags & ~RISCOM_LEGAL_FLAGS)) | |
1342 | return -EINVAL; | |
1343 | #endif | |
1344 | ||
1345 | change_speed = ((port->flags & ASYNC_SPD_MASK) != | |
1346 | (tmp.flags & ASYNC_SPD_MASK)); | |
1347 | ||
1348 | if (!capable(CAP_SYS_ADMIN)) { | |
1349 | if ((tmp.close_delay != port->close_delay) || | |
1350 | (tmp.closing_wait != port->closing_wait) || | |
1351 | ((tmp.flags & ~ASYNC_USR_MASK) != | |
1352 | (port->flags & ~ASYNC_USR_MASK))) | |
1353 | return -EPERM; | |
1354 | port->flags = ((port->flags & ~ASYNC_USR_MASK) | | |
1355 | (tmp.flags & ASYNC_USR_MASK)); | |
1356 | } else { | |
1357 | port->flags = ((port->flags & ~ASYNC_FLAGS) | | |
1358 | (tmp.flags & ASYNC_FLAGS)); | |
1359 | port->close_delay = tmp.close_delay; | |
1360 | port->closing_wait = tmp.closing_wait; | |
1361 | } | |
1362 | if (change_speed) { | |
d9afa435 JG |
1363 | unsigned long flags; |
1364 | ||
1365 | spin_lock_irqsave(&riscom_lock, flags); | |
1da177e4 | 1366 | rc_change_speed(bp, port); |
d9afa435 | 1367 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1368 | } |
1369 | return 0; | |
1370 | } | |
1371 | ||
1372 | static inline int rc_get_serial_info(struct riscom_port * port, | |
1373 | struct serial_struct __user *retinfo) | |
1374 | { | |
1375 | struct serial_struct tmp; | |
1376 | struct riscom_board *bp = port_Board(port); | |
1377 | ||
1378 | memset(&tmp, 0, sizeof(tmp)); | |
1379 | tmp.type = PORT_CIRRUS; | |
1380 | tmp.line = port - rc_port; | |
1381 | tmp.port = bp->base; | |
1382 | tmp.irq = bp->irq; | |
1383 | tmp.flags = port->flags; | |
1384 | tmp.baud_base = (RC_OSCFREQ + CD180_TPC/2) / CD180_TPC; | |
1385 | tmp.close_delay = port->close_delay * HZ/100; | |
1386 | tmp.closing_wait = port->closing_wait * HZ/100; | |
1387 | tmp.xmit_fifo_size = CD180_NFIFO; | |
1388 | return copy_to_user(retinfo, &tmp, sizeof(tmp)) ? -EFAULT : 0; | |
1389 | } | |
1390 | ||
1391 | static int rc_ioctl(struct tty_struct * tty, struct file * filp, | |
1392 | unsigned int cmd, unsigned long arg) | |
1393 | ||
1394 | { | |
1395 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1396 | void __user *argp = (void __user *)arg; | |
1397 | int retval; | |
1398 | ||
1399 | if (rc_paranoia_check(port, tty->name, "rc_ioctl")) | |
1400 | return -ENODEV; | |
1401 | ||
1402 | switch (cmd) { | |
1403 | case TCSBRK: /* SVID version: non-zero arg --> no break */ | |
1404 | retval = tty_check_change(tty); | |
1405 | if (retval) | |
1406 | return retval; | |
1407 | tty_wait_until_sent(tty, 0); | |
1408 | if (!arg) | |
1409 | rc_send_break(port, HZ/4); /* 1/4 second */ | |
1410 | break; | |
1411 | case TCSBRKP: /* support for POSIX tcsendbreak() */ | |
1412 | retval = tty_check_change(tty); | |
1413 | if (retval) | |
1414 | return retval; | |
1415 | tty_wait_until_sent(tty, 0); | |
1416 | rc_send_break(port, arg ? arg*(HZ/10) : HZ/4); | |
1417 | break; | |
1418 | case TIOCGSOFTCAR: | |
1419 | return put_user(C_CLOCAL(tty) ? 1 : 0, (unsigned __user *)argp); | |
1420 | case TIOCSSOFTCAR: | |
1421 | if (get_user(arg,(unsigned __user *) argp)) | |
1422 | return -EFAULT; | |
1423 | tty->termios->c_cflag = | |
1424 | ((tty->termios->c_cflag & ~CLOCAL) | | |
1425 | (arg ? CLOCAL : 0)); | |
1426 | break; | |
1427 | case TIOCGSERIAL: | |
1428 | return rc_get_serial_info(port, argp); | |
1429 | case TIOCSSERIAL: | |
1430 | return rc_set_serial_info(port, argp); | |
1431 | default: | |
1432 | return -ENOIOCTLCMD; | |
1433 | } | |
1434 | return 0; | |
1435 | } | |
1436 | ||
1437 | static void rc_throttle(struct tty_struct * tty) | |
1438 | { | |
1439 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1440 | struct riscom_board *bp; | |
1441 | unsigned long flags; | |
1442 | ||
1443 | if (rc_paranoia_check(port, tty->name, "rc_throttle")) | |
1444 | return; | |
1445 | ||
1446 | bp = port_Board(port); | |
d9afa435 JG |
1447 | |
1448 | spin_lock_irqsave(&riscom_lock, flags); | |
1449 | ||
1da177e4 LT |
1450 | port->MSVR &= ~MSVR_RTS; |
1451 | rc_out(bp, CD180_CAR, port_No(port)); | |
d9afa435 | 1452 | if (I_IXOFF(tty)) { |
1da177e4 LT |
1453 | rc_wait_CCR(bp); |
1454 | rc_out(bp, CD180_CCR, CCR_SSCH2); | |
1455 | rc_wait_CCR(bp); | |
1456 | } | |
1457 | rc_out(bp, CD180_MSVR, port->MSVR); | |
d9afa435 JG |
1458 | |
1459 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
1460 | } |
1461 | ||
1462 | static void rc_unthrottle(struct tty_struct * tty) | |
1463 | { | |
1464 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1465 | struct riscom_board *bp; | |
1466 | unsigned long flags; | |
1467 | ||
1468 | if (rc_paranoia_check(port, tty->name, "rc_unthrottle")) | |
1469 | return; | |
1470 | ||
1471 | bp = port_Board(port); | |
1472 | ||
d9afa435 JG |
1473 | spin_lock_irqsave(&riscom_lock, flags); |
1474 | ||
1da177e4 LT |
1475 | port->MSVR |= MSVR_RTS; |
1476 | rc_out(bp, CD180_CAR, port_No(port)); | |
1477 | if (I_IXOFF(tty)) { | |
1478 | rc_wait_CCR(bp); | |
1479 | rc_out(bp, CD180_CCR, CCR_SSCH1); | |
1480 | rc_wait_CCR(bp); | |
1481 | } | |
1482 | rc_out(bp, CD180_MSVR, port->MSVR); | |
d9afa435 JG |
1483 | |
1484 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
1485 | } |
1486 | ||
1487 | static void rc_stop(struct tty_struct * tty) | |
1488 | { | |
1489 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1490 | struct riscom_board *bp; | |
1491 | unsigned long flags; | |
1492 | ||
1493 | if (rc_paranoia_check(port, tty->name, "rc_stop")) | |
1494 | return; | |
1495 | ||
1496 | bp = port_Board(port); | |
1497 | ||
d9afa435 JG |
1498 | spin_lock_irqsave(&riscom_lock, flags); |
1499 | ||
1da177e4 LT |
1500 | port->IER &= ~IER_TXRDY; |
1501 | rc_out(bp, CD180_CAR, port_No(port)); | |
1502 | rc_out(bp, CD180_IER, port->IER); | |
d9afa435 JG |
1503 | |
1504 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
1505 | } |
1506 | ||
1507 | static void rc_start(struct tty_struct * tty) | |
1508 | { | |
1509 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1510 | struct riscom_board *bp; | |
1511 | unsigned long flags; | |
1512 | ||
1513 | if (rc_paranoia_check(port, tty->name, "rc_start")) | |
1514 | return; | |
1515 | ||
1516 | bp = port_Board(port); | |
1517 | ||
d9afa435 JG |
1518 | spin_lock_irqsave(&riscom_lock, flags); |
1519 | ||
1da177e4 LT |
1520 | if (port->xmit_cnt && port->xmit_buf && !(port->IER & IER_TXRDY)) { |
1521 | port->IER |= IER_TXRDY; | |
1522 | rc_out(bp, CD180_CAR, port_No(port)); | |
1523 | rc_out(bp, CD180_IER, port->IER); | |
1524 | } | |
d9afa435 JG |
1525 | |
1526 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
1527 | } |
1528 | ||
1529 | /* | |
1530 | * This routine is called from the work queue when the interrupt | |
1531 | * routine has signalled that a hangup has occurred. The path of | |
1532 | * hangup processing is: | |
1533 | * | |
1534 | * serial interrupt routine -> (workqueue) -> | |
1535 | * do_rc_hangup() -> tty->hangup() -> rc_hangup() | |
1536 | * | |
1537 | */ | |
3e577a80 | 1538 | static void do_rc_hangup(struct work_struct *ugly_api) |
1da177e4 | 1539 | { |
3e577a80 | 1540 | struct riscom_port *port = container_of(ugly_api, struct riscom_port, tqueue_hangup); |
1da177e4 LT |
1541 | struct tty_struct *tty; |
1542 | ||
1543 | tty = port->tty; | |
1544 | if (tty) | |
1545 | tty_hangup(tty); /* FIXME: module removal race still here */ | |
1546 | } | |
1547 | ||
1548 | static void rc_hangup(struct tty_struct * tty) | |
1549 | { | |
1550 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1551 | struct riscom_board *bp; | |
1552 | ||
1553 | if (rc_paranoia_check(port, tty->name, "rc_hangup")) | |
1554 | return; | |
1555 | ||
1556 | bp = port_Board(port); | |
1557 | ||
1558 | rc_shutdown_port(bp, port); | |
1559 | port->event = 0; | |
1560 | port->count = 0; | |
1561 | port->flags &= ~ASYNC_NORMAL_ACTIVE; | |
1562 | port->tty = NULL; | |
1563 | wake_up_interruptible(&port->open_wait); | |
1564 | } | |
1565 | ||
606d099c | 1566 | static void rc_set_termios(struct tty_struct * tty, struct ktermios * old_termios) |
1da177e4 LT |
1567 | { |
1568 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1569 | unsigned long flags; | |
1570 | ||
1571 | if (rc_paranoia_check(port, tty->name, "rc_set_termios")) | |
1572 | return; | |
1573 | ||
1574 | if (tty->termios->c_cflag == old_termios->c_cflag && | |
1575 | tty->termios->c_iflag == old_termios->c_iflag) | |
1576 | return; | |
1577 | ||
d9afa435 | 1578 | spin_lock_irqsave(&riscom_lock, flags); |
1da177e4 | 1579 | rc_change_speed(port_Board(port), port); |
d9afa435 | 1580 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1581 | |
1582 | if ((old_termios->c_cflag & CRTSCTS) && | |
1583 | !(tty->termios->c_cflag & CRTSCTS)) { | |
1584 | tty->hw_stopped = 0; | |
1585 | rc_start(tty); | |
1586 | } | |
1587 | } | |
1588 | ||
3e577a80 | 1589 | static void do_softint(struct work_struct *ugly_api) |
1da177e4 | 1590 | { |
3e577a80 | 1591 | struct riscom_port *port = container_of(ugly_api, struct riscom_port, tqueue); |
1da177e4 LT |
1592 | struct tty_struct *tty; |
1593 | ||
1594 | if(!(tty = port->tty)) | |
1595 | return; | |
1596 | ||
b963a844 | 1597 | if (test_and_clear_bit(RS_EVENT_WRITE_WAKEUP, &port->event)) |
1da177e4 | 1598 | tty_wakeup(tty); |
1da177e4 LT |
1599 | } |
1600 | ||
b68e31d0 | 1601 | static const struct tty_operations riscom_ops = { |
1da177e4 LT |
1602 | .open = rc_open, |
1603 | .close = rc_close, | |
1604 | .write = rc_write, | |
1605 | .put_char = rc_put_char, | |
1606 | .flush_chars = rc_flush_chars, | |
1607 | .write_room = rc_write_room, | |
1608 | .chars_in_buffer = rc_chars_in_buffer, | |
1609 | .flush_buffer = rc_flush_buffer, | |
1610 | .ioctl = rc_ioctl, | |
1611 | .throttle = rc_throttle, | |
1612 | .unthrottle = rc_unthrottle, | |
1613 | .set_termios = rc_set_termios, | |
1614 | .stop = rc_stop, | |
1615 | .start = rc_start, | |
1616 | .hangup = rc_hangup, | |
1617 | .tiocmget = rc_tiocmget, | |
1618 | .tiocmset = rc_tiocmset, | |
1619 | }; | |
1620 | ||
1621 | static inline int rc_init_drivers(void) | |
1622 | { | |
1623 | int error; | |
1624 | int i; | |
1625 | ||
1626 | riscom_driver = alloc_tty_driver(RC_NBOARD * RC_NPORT); | |
1627 | if (!riscom_driver) | |
1628 | return -ENOMEM; | |
1629 | ||
1da177e4 LT |
1630 | riscom_driver->owner = THIS_MODULE; |
1631 | riscom_driver->name = "ttyL"; | |
1da177e4 LT |
1632 | riscom_driver->major = RISCOM8_NORMAL_MAJOR; |
1633 | riscom_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1634 | riscom_driver->subtype = SERIAL_TYPE_NORMAL; | |
1635 | riscom_driver->init_termios = tty_std_termios; | |
1636 | riscom_driver->init_termios.c_cflag = | |
1637 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
606d099c AC |
1638 | riscom_driver->init_termios.c_ispeed = 9600; |
1639 | riscom_driver->init_termios.c_ospeed = 9600; | |
1da177e4 LT |
1640 | riscom_driver->flags = TTY_DRIVER_REAL_RAW; |
1641 | tty_set_operations(riscom_driver, &riscom_ops); | |
1642 | if ((error = tty_register_driver(riscom_driver))) { | |
1da177e4 LT |
1643 | put_tty_driver(riscom_driver); |
1644 | printk(KERN_ERR "rc: Couldn't register RISCom/8 driver, " | |
1645 | "error = %d\n", | |
1646 | error); | |
1647 | return 1; | |
1648 | } | |
1649 | ||
1650 | memset(rc_port, 0, sizeof(rc_port)); | |
1651 | for (i = 0; i < RC_NPORT * RC_NBOARD; i++) { | |
1652 | rc_port[i].magic = RISCOM8_MAGIC; | |
3e577a80 AV |
1653 | INIT_WORK(&rc_port[i].tqueue, do_softint); |
1654 | INIT_WORK(&rc_port[i].tqueue_hangup, do_rc_hangup); | |
1da177e4 LT |
1655 | rc_port[i].close_delay = 50 * HZ/100; |
1656 | rc_port[i].closing_wait = 3000 * HZ/100; | |
1657 | init_waitqueue_head(&rc_port[i].open_wait); | |
1658 | init_waitqueue_head(&rc_port[i].close_wait); | |
1659 | } | |
1660 | ||
1661 | return 0; | |
1662 | } | |
1663 | ||
1664 | static void rc_release_drivers(void) | |
1665 | { | |
1666 | unsigned long flags; | |
1667 | ||
d9afa435 JG |
1668 | spin_lock_irqsave(&riscom_lock, flags); |
1669 | ||
1da177e4 LT |
1670 | tty_unregister_driver(riscom_driver); |
1671 | put_tty_driver(riscom_driver); | |
d9afa435 JG |
1672 | |
1673 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
1674 | } |
1675 | ||
1676 | #ifndef MODULE | |
1677 | /* | |
1678 | * Called at boot time. | |
1679 | * | |
1680 | * You can specify IO base for up to RC_NBOARD cards, | |
1681 | * using line "riscom8=0xiobase1,0xiobase2,.." at LILO prompt. | |
1682 | * Note that there will be no probing at default | |
1683 | * addresses in this case. | |
1684 | * | |
1685 | */ | |
1686 | static int __init riscom8_setup(char *str) | |
1687 | { | |
1688 | int ints[RC_NBOARD]; | |
1689 | int i; | |
1690 | ||
1691 | str = get_options(str, ARRAY_SIZE(ints), ints); | |
1692 | ||
1693 | for (i = 0; i < RC_NBOARD; i++) { | |
1694 | if (i < ints[0]) | |
1695 | rc_board[i].base = ints[i+1]; | |
1696 | else | |
1697 | rc_board[i].base = 0; | |
1698 | } | |
1699 | return 1; | |
1700 | } | |
1701 | ||
1702 | __setup("riscom8=", riscom8_setup); | |
1703 | #endif | |
1704 | ||
1705 | static char banner[] __initdata = | |
1706 | KERN_INFO "rc: SDL RISCom/8 card driver v1.1, (c) D.Gorodchanin " | |
1707 | "1994-1996.\n"; | |
1708 | static char no_boards_msg[] __initdata = | |
1709 | KERN_INFO "rc: No RISCom/8 boards detected.\n"; | |
1710 | ||
1711 | /* | |
1712 | * This routine must be called by kernel at boot time | |
1713 | */ | |
1714 | static int __init riscom8_init(void) | |
1715 | { | |
1716 | int i; | |
1717 | int found = 0; | |
1718 | ||
1719 | printk(banner); | |
1720 | ||
1721 | if (rc_init_drivers()) | |
1722 | return -EIO; | |
1723 | ||
1724 | for (i = 0; i < RC_NBOARD; i++) | |
1725 | if (rc_board[i].base && !rc_probe(&rc_board[i])) | |
1726 | found++; | |
1727 | ||
1728 | if (!found) { | |
1729 | rc_release_drivers(); | |
1730 | printk(no_boards_msg); | |
1731 | return -EIO; | |
1732 | } | |
1733 | return 0; | |
1734 | } | |
1735 | ||
1736 | #ifdef MODULE | |
1737 | static int iobase; | |
1738 | static int iobase1; | |
1739 | static int iobase2; | |
1740 | static int iobase3; | |
8d3b33f6 RR |
1741 | module_param(iobase, int, 0); |
1742 | module_param(iobase1, int, 0); | |
1743 | module_param(iobase2, int, 0); | |
1744 | module_param(iobase3, int, 0); | |
1da177e4 LT |
1745 | |
1746 | MODULE_LICENSE("GPL"); | |
1747 | #endif /* MODULE */ | |
1748 | ||
1749 | /* | |
1750 | * You can setup up to 4 boards (current value of RC_NBOARD) | |
1751 | * by specifying "iobase=0xXXX iobase1=0xXXX ..." as insmod parameter. | |
1752 | * | |
1753 | */ | |
1754 | static int __init riscom8_init_module (void) | |
1755 | { | |
1756 | #ifdef MODULE | |
1757 | int i; | |
1758 | ||
1759 | if (iobase || iobase1 || iobase2 || iobase3) { | |
1760 | for(i = 0; i < RC_NBOARD; i++) | |
1761 | rc_board[0].base = 0; | |
1762 | } | |
1763 | ||
1764 | if (iobase) | |
1765 | rc_board[0].base = iobase; | |
1766 | if (iobase1) | |
1767 | rc_board[1].base = iobase1; | |
1768 | if (iobase2) | |
1769 | rc_board[2].base = iobase2; | |
1770 | if (iobase3) | |
1771 | rc_board[3].base = iobase3; | |
1772 | #endif /* MODULE */ | |
1773 | ||
1774 | return riscom8_init(); | |
1775 | } | |
1776 | ||
1777 | static void __exit riscom8_exit_module (void) | |
1778 | { | |
1779 | int i; | |
1780 | ||
1781 | rc_release_drivers(); | |
1782 | for (i = 0; i < RC_NBOARD; i++) | |
1783 | if (rc_board[i].flags & RC_BOARD_PRESENT) | |
1784 | rc_release_io_range(&rc_board[i]); | |
1785 | ||
1786 | } | |
1787 | ||
1788 | module_init(riscom8_init_module); | |
1789 | module_exit(riscom8_exit_module); | |
1790 |