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 | |
9492e135 AC |
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 | |
1da177e4 LT |
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 | ||
9492e135 | 36 | #include <linux/io.h> |
1da177e4 LT |
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 | 51 | |
9492e135 | 52 | #include <linux/uaccess.h> |
1da177e4 LT |
53 | |
54 | #include "riscom8.h" | |
55 | #include "riscom8_reg.h" | |
56 | ||
57 | /* Am I paranoid or not ? ;-) */ | |
58 | #define RISCOM_PARANOIA_CHECK | |
59 | ||
9492e135 AC |
60 | /* |
61 | * Crazy InteliCom/8 boards sometimes have swapped CTS & DSR signals. | |
1da177e4 | 62 | * You can slightly speed up things by #undefing the following option, |
9492e135 | 63 | * if you are REALLY sure that your board is correct one. |
1da177e4 LT |
64 | */ |
65 | ||
66 | #define RISCOM_BRAIN_DAMAGED_CTS | |
67 | ||
9492e135 | 68 | /* |
1da177e4 LT |
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 | ||
1da177e4 | 81 | static struct tty_driver *riscom_driver; |
1da177e4 | 82 | |
d9afa435 JG |
83 | static DEFINE_SPINLOCK(riscom_lock); |
84 | ||
1da177e4 LT |
85 | static struct riscom_board rc_board[RC_NBOARD] = { |
86 | { | |
87 | .base = RC_IOBASE1, | |
88 | }, | |
89 | { | |
90 | .base = RC_IOBASE2, | |
91 | }, | |
92 | { | |
93 | .base = RC_IOBASE3, | |
94 | }, | |
95 | { | |
96 | .base = RC_IOBASE4, | |
97 | }, | |
98 | }; | |
99 | ||
100 | static struct riscom_port rc_port[RC_NBOARD * RC_NPORT]; | |
101 | ||
102 | /* RISCom/8 I/O ports addresses (without address translation) */ | |
103 | static unsigned short rc_ioport[] = { | |
fe971071 | 104 | #if 1 |
1da177e4 | 105 | 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x09, 0x0a, 0x0b, 0x0c, |
fe971071 | 106 | #else |
1da177e4 LT |
107 | 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x09, 0x0a, 0x0b, 0x0c, 0x10, |
108 | 0x11, 0x12, 0x18, 0x28, 0x31, 0x32, 0x39, 0x3a, 0x40, 0x41, 0x61, 0x62, | |
109 | 0x63, 0x64, 0x6b, 0x70, 0x71, 0x78, 0x7a, 0x7b, 0x7f, 0x100, 0x101 | |
fe971071 | 110 | #endif |
1da177e4 | 111 | }; |
fe971071 | 112 | #define RC_NIOPORT ARRAY_SIZE(rc_ioport) |
1da177e4 LT |
113 | |
114 | ||
9492e135 | 115 | static int rc_paranoia_check(struct riscom_port const *port, |
1da177e4 LT |
116 | char *name, const char *routine) |
117 | { | |
118 | #ifdef RISCOM_PARANOIA_CHECK | |
119 | static const char badmagic[] = KERN_INFO | |
120 | "rc: Warning: bad riscom port magic number for device %s in %s\n"; | |
121 | static const char badinfo[] = KERN_INFO | |
122 | "rc: Warning: null riscom port for device %s in %s\n"; | |
123 | ||
124 | if (!port) { | |
125 | printk(badinfo, name, routine); | |
126 | return 1; | |
127 | } | |
128 | if (port->magic != RISCOM8_MAGIC) { | |
129 | printk(badmagic, name, routine); | |
130 | return 1; | |
131 | } | |
132 | #endif | |
133 | return 0; | |
134 | } | |
135 | ||
136 | /* | |
9492e135 | 137 | * |
1da177e4 | 138 | * Service functions for RISCom/8 driver. |
9492e135 | 139 | * |
1da177e4 LT |
140 | */ |
141 | ||
142 | /* Get board number from pointer */ | |
9492e135 | 143 | static inline int board_No(struct riscom_board const *bp) |
1da177e4 LT |
144 | { |
145 | return bp - rc_board; | |
146 | } | |
147 | ||
148 | /* Get port number from pointer */ | |
9492e135 | 149 | static inline int port_No(struct riscom_port const *port) |
1da177e4 | 150 | { |
9492e135 | 151 | return RC_PORT(port - rc_port); |
1da177e4 LT |
152 | } |
153 | ||
154 | /* Get pointer to board from pointer to port */ | |
9492e135 | 155 | static inline struct riscom_board *port_Board(struct riscom_port const *port) |
1da177e4 LT |
156 | { |
157 | return &rc_board[RC_BOARD(port - rc_port)]; | |
158 | } | |
159 | ||
160 | /* Input Byte from CL CD180 register */ | |
9492e135 AC |
161 | static inline unsigned char rc_in(struct riscom_board const *bp, |
162 | unsigned short reg) | |
1da177e4 LT |
163 | { |
164 | return inb(bp->base + RC_TO_ISA(reg)); | |
165 | } | |
166 | ||
167 | /* Output Byte to CL CD180 register */ | |
9492e135 | 168 | static inline void rc_out(struct riscom_board const *bp, unsigned short reg, |
1da177e4 LT |
169 | unsigned char val) |
170 | { | |
171 | outb(val, bp->base + RC_TO_ISA(reg)); | |
172 | } | |
173 | ||
174 | /* Wait for Channel Command Register ready */ | |
9492e135 | 175 | static void rc_wait_CCR(struct riscom_board const *bp) |
1da177e4 LT |
176 | { |
177 | unsigned long delay; | |
178 | ||
179 | /* FIXME: need something more descriptive then 100000 :) */ | |
9492e135 | 180 | for (delay = 100000; delay; delay--) |
1da177e4 LT |
181 | if (!rc_in(bp, CD180_CCR)) |
182 | return; | |
9492e135 | 183 | |
1da177e4 LT |
184 | printk(KERN_INFO "rc%d: Timeout waiting for CCR.\n", board_No(bp)); |
185 | } | |
186 | ||
187 | /* | |
188 | * RISCom/8 probe functions. | |
189 | */ | |
190 | ||
9492e135 | 191 | static int rc_request_io_range(struct riscom_board * const bp) |
1da177e4 LT |
192 | { |
193 | int i; | |
9492e135 AC |
194 | |
195 | for (i = 0; i < RC_NIOPORT; i++) | |
1da177e4 LT |
196 | if (!request_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1, |
197 | "RISCom/8")) { | |
198 | goto out_release; | |
199 | } | |
200 | return 0; | |
201 | out_release: | |
202 | printk(KERN_INFO "rc%d: Skipping probe at 0x%03x. IO address in use.\n", | |
203 | board_No(bp), bp->base); | |
9492e135 | 204 | while (--i >= 0) |
1da177e4 LT |
205 | release_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1); |
206 | return 1; | |
207 | } | |
208 | ||
9492e135 | 209 | static void rc_release_io_range(struct riscom_board * const bp) |
1da177e4 LT |
210 | { |
211 | int i; | |
9492e135 AC |
212 | |
213 | for (i = 0; i < RC_NIOPORT; i++) | |
1da177e4 LT |
214 | release_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1); |
215 | } | |
9492e135 | 216 | |
1da177e4 | 217 | /* Reset and setup CD180 chip */ |
9492e135 | 218 | static void __init rc_init_CD180(struct riscom_board const *bp) |
1da177e4 LT |
219 | { |
220 | unsigned long flags; | |
9492e135 | 221 | |
d9afa435 JG |
222 | spin_lock_irqsave(&riscom_lock, flags); |
223 | ||
9492e135 AC |
224 | rc_out(bp, RC_CTOUT, 0); /* Clear timeout */ |
225 | rc_wait_CCR(bp); /* Wait for CCR ready */ | |
226 | rc_out(bp, CD180_CCR, CCR_HARDRESET); /* Reset CD180 chip */ | |
d9afa435 | 227 | spin_unlock_irqrestore(&riscom_lock, flags); |
9492e135 | 228 | msleep(50); /* Delay 0.05 sec */ |
d9afa435 | 229 | spin_lock_irqsave(&riscom_lock, flags); |
9492e135 AC |
230 | rc_out(bp, CD180_GIVR, RC_ID); /* Set ID for this chip */ |
231 | rc_out(bp, CD180_GICR, 0); /* Clear all bits */ | |
232 | rc_out(bp, CD180_PILR1, RC_ACK_MINT); /* Prio for modem intr */ | |
233 | rc_out(bp, CD180_PILR2, RC_ACK_TINT); /* Prio for tx intr */ | |
234 | rc_out(bp, CD180_PILR3, RC_ACK_RINT); /* Prio for rx intr */ | |
235 | ||
1da177e4 LT |
236 | /* Setting up prescaler. We need 4 ticks per 1 ms */ |
237 | rc_out(bp, CD180_PPRH, (RC_OSCFREQ/(1000000/RISCOM_TPS)) >> 8); | |
238 | rc_out(bp, CD180_PPRL, (RC_OSCFREQ/(1000000/RISCOM_TPS)) & 0xff); | |
9492e135 | 239 | |
d9afa435 | 240 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
241 | } |
242 | ||
243 | /* Main probing routine, also sets irq. */ | |
244 | static int __init rc_probe(struct riscom_board *bp) | |
245 | { | |
246 | unsigned char val1, val2; | |
247 | int irqs = 0; | |
248 | int retries; | |
9492e135 | 249 | |
1da177e4 LT |
250 | bp->irq = 0; |
251 | ||
252 | if (rc_request_io_range(bp)) | |
253 | return 1; | |
9492e135 | 254 | |
1da177e4 LT |
255 | /* Are the I/O ports here ? */ |
256 | rc_out(bp, CD180_PPRL, 0x5a); | |
257 | outb(0xff, 0x80); | |
258 | val1 = rc_in(bp, CD180_PPRL); | |
259 | rc_out(bp, CD180_PPRL, 0xa5); | |
260 | outb(0x00, 0x80); | |
261 | val2 = rc_in(bp, CD180_PPRL); | |
9492e135 | 262 | |
1da177e4 LT |
263 | if ((val1 != 0x5a) || (val2 != 0xa5)) { |
264 | printk(KERN_ERR "rc%d: RISCom/8 Board at 0x%03x not found.\n", | |
265 | board_No(bp), bp->base); | |
266 | goto out_release; | |
267 | } | |
9492e135 | 268 | |
1da177e4 | 269 | /* It's time to find IRQ for this board */ |
9492e135 | 270 | for (retries = 0; retries < 5 && irqs <= 0; retries++) { |
1da177e4 | 271 | irqs = probe_irq_on(); |
9492e135 AC |
272 | rc_init_CD180(bp); /* Reset CD180 chip */ |
273 | rc_out(bp, CD180_CAR, 2); /* Select port 2 */ | |
1da177e4 | 274 | rc_wait_CCR(bp); |
9492e135 AC |
275 | rc_out(bp, CD180_CCR, CCR_TXEN); /* Enable transmitter */ |
276 | rc_out(bp, CD180_IER, IER_TXRDY);/* Enable tx empty intr */ | |
c4ebd927 | 277 | msleep(50); |
1da177e4 | 278 | irqs = probe_irq_off(irqs); |
9492e135 AC |
279 | val1 = rc_in(bp, RC_BSR); /* Get Board Status reg */ |
280 | val2 = rc_in(bp, RC_ACK_TINT); /* ACK interrupt */ | |
281 | rc_init_CD180(bp); /* Reset CD180 again */ | |
282 | ||
1da177e4 LT |
283 | if ((val1 & RC_BSR_TINT) || (val2 != (RC_ID | GIVR_IT_TX))) { |
284 | printk(KERN_ERR "rc%d: RISCom/8 Board at 0x%03x not " | |
285 | "found.\n", board_No(bp), bp->base); | |
286 | goto out_release; | |
287 | } | |
288 | } | |
9492e135 | 289 | |
1da177e4 LT |
290 | if (irqs <= 0) { |
291 | printk(KERN_ERR "rc%d: Can't find IRQ for RISCom/8 board " | |
292 | "at 0x%03x.\n", board_No(bp), bp->base); | |
293 | goto out_release; | |
294 | } | |
295 | bp->irq = irqs; | |
296 | bp->flags |= RC_BOARD_PRESENT; | |
9492e135 | 297 | |
1da177e4 LT |
298 | printk(KERN_INFO "rc%d: RISCom/8 Rev. %c board detected at " |
299 | "0x%03x, IRQ %d.\n", | |
300 | board_No(bp), | |
301 | (rc_in(bp, CD180_GFRCR) & 0x0f) + 'A', /* Board revision */ | |
302 | bp->base, bp->irq); | |
9492e135 | 303 | |
1da177e4 LT |
304 | return 0; |
305 | out_release: | |
306 | rc_release_io_range(bp); | |
307 | return 1; | |
308 | } | |
309 | ||
9492e135 AC |
310 | /* |
311 | * | |
1da177e4 | 312 | * Interrupt processing routines. |
9492e135 | 313 | * |
1da177e4 LT |
314 | */ |
315 | ||
9492e135 AC |
316 | static struct riscom_port *rc_get_port(struct riscom_board const *bp, |
317 | unsigned char const *what) | |
1da177e4 LT |
318 | { |
319 | unsigned char channel; | |
9492e135 AC |
320 | struct riscom_port *port; |
321 | ||
1da177e4 LT |
322 | channel = rc_in(bp, CD180_GICR) >> GICR_CHAN_OFF; |
323 | if (channel < CD180_NCH) { | |
324 | port = &rc_port[board_No(bp) * RC_NPORT + channel]; | |
9492e135 | 325 | if (port->flags & ASYNC_INITIALIZED) |
1da177e4 | 326 | return port; |
1da177e4 | 327 | } |
9492e135 | 328 | printk(KERN_ERR "rc%d: %s interrupt from invalid port %d\n", |
1da177e4 LT |
329 | board_No(bp), what, channel); |
330 | return NULL; | |
331 | } | |
332 | ||
9492e135 | 333 | static void rc_receive_exc(struct riscom_board const *bp) |
1da177e4 LT |
334 | { |
335 | struct riscom_port *port; | |
336 | struct tty_struct *tty; | |
337 | unsigned char status; | |
33f0f88f | 338 | unsigned char ch, flag; |
9492e135 AC |
339 | |
340 | port = rc_get_port(bp, "Receive"); | |
341 | if (port == NULL) | |
1da177e4 LT |
342 | return; |
343 | ||
344 | tty = port->tty; | |
9492e135 AC |
345 | |
346 | #ifdef RC_REPORT_OVERRUN | |
1da177e4 | 347 | status = rc_in(bp, CD180_RCSR); |
33f0f88f | 348 | if (status & RCSR_OE) |
1da177e4 | 349 | port->overrun++; |
1da177e4 | 350 | status &= port->mark_mask; |
9492e135 | 351 | #else |
1da177e4 | 352 | status = rc_in(bp, CD180_RCSR) & port->mark_mask; |
9492e135 | 353 | #endif |
1da177e4 | 354 | ch = rc_in(bp, CD180_RDR); |
9492e135 | 355 | if (!status) |
1da177e4 | 356 | return; |
1da177e4 LT |
357 | if (status & RCSR_TOUT) { |
358 | printk(KERN_WARNING "rc%d: port %d: Receiver timeout. " | |
9492e135 | 359 | "Hardware problems ?\n", |
1da177e4 LT |
360 | board_No(bp), port_No(port)); |
361 | return; | |
9492e135 | 362 | |
1da177e4 LT |
363 | } else if (status & RCSR_BREAK) { |
364 | printk(KERN_INFO "rc%d: port %d: Handling break...\n", | |
365 | board_No(bp), port_No(port)); | |
33f0f88f | 366 | flag = TTY_BREAK; |
1da177e4 LT |
367 | if (port->flags & ASYNC_SAK) |
368 | do_SAK(tty); | |
9492e135 AC |
369 | |
370 | } else if (status & RCSR_PE) | |
33f0f88f | 371 | flag = TTY_PARITY; |
9492e135 AC |
372 | |
373 | else if (status & RCSR_FE) | |
33f0f88f | 374 | flag = TTY_FRAME; |
9492e135 AC |
375 | |
376 | else if (status & RCSR_OE) | |
33f0f88f | 377 | flag = TTY_OVERRUN; |
1da177e4 | 378 | else |
33f0f88f | 379 | flag = TTY_NORMAL; |
9492e135 | 380 | |
33f0f88f AC |
381 | tty_insert_flip_char(tty, ch, flag); |
382 | tty_flip_buffer_push(tty); | |
1da177e4 LT |
383 | } |
384 | ||
9492e135 | 385 | static void rc_receive(struct riscom_board const *bp) |
1da177e4 LT |
386 | { |
387 | struct riscom_port *port; | |
388 | struct tty_struct *tty; | |
389 | unsigned char count; | |
9492e135 AC |
390 | |
391 | port = rc_get_port(bp, "Receive"); | |
392 | if (port == NULL) | |
1da177e4 | 393 | return; |
9492e135 | 394 | |
1da177e4 | 395 | tty = port->tty; |
9492e135 | 396 | |
1da177e4 | 397 | count = rc_in(bp, CD180_RDCR); |
9492e135 | 398 | |
1da177e4 LT |
399 | #ifdef RC_REPORT_FIFO |
400 | port->hits[count > 8 ? 9 : count]++; | |
9492e135 AC |
401 | #endif |
402 | ||
1da177e4 | 403 | while (count--) { |
33f0f88f | 404 | if (tty_buffer_request_room(tty, 1) == 0) { |
1da177e4 LT |
405 | printk(KERN_WARNING "rc%d: port %d: Working around " |
406 | "flip buffer overflow.\n", | |
407 | board_No(bp), port_No(port)); | |
408 | break; | |
409 | } | |
33f0f88f | 410 | tty_insert_flip_char(tty, rc_in(bp, CD180_RDR), TTY_NORMAL); |
1da177e4 | 411 | } |
33f0f88f | 412 | tty_flip_buffer_push(tty); |
1da177e4 LT |
413 | } |
414 | ||
9492e135 | 415 | static void rc_transmit(struct riscom_board const *bp) |
1da177e4 LT |
416 | { |
417 | struct riscom_port *port; | |
418 | struct tty_struct *tty; | |
419 | unsigned char count; | |
9492e135 AC |
420 | |
421 | port = rc_get_port(bp, "Transmit"); | |
422 | if (port == NULL) | |
1da177e4 | 423 | return; |
9492e135 | 424 | |
1da177e4 | 425 | tty = port->tty; |
9492e135 AC |
426 | |
427 | if (port->IER & IER_TXEMPTY) { | |
1da177e4 LT |
428 | /* FIFO drained */ |
429 | rc_out(bp, CD180_CAR, port_No(port)); | |
430 | port->IER &= ~IER_TXEMPTY; | |
431 | rc_out(bp, CD180_IER, port->IER); | |
432 | return; | |
433 | } | |
9492e135 | 434 | |
1da177e4 LT |
435 | if ((port->xmit_cnt <= 0 && !port->break_length) |
436 | || tty->stopped || tty->hw_stopped) { | |
437 | rc_out(bp, CD180_CAR, port_No(port)); | |
438 | port->IER &= ~IER_TXRDY; | |
439 | rc_out(bp, CD180_IER, port->IER); | |
440 | return; | |
441 | } | |
9492e135 | 442 | |
1da177e4 LT |
443 | if (port->break_length) { |
444 | if (port->break_length > 0) { | |
445 | if (port->COR2 & COR2_ETC) { | |
446 | rc_out(bp, CD180_TDR, CD180_C_ESC); | |
447 | rc_out(bp, CD180_TDR, CD180_C_SBRK); | |
448 | port->COR2 &= ~COR2_ETC; | |
449 | } | |
450 | count = min_t(int, port->break_length, 0xff); | |
451 | rc_out(bp, CD180_TDR, CD180_C_ESC); | |
452 | rc_out(bp, CD180_TDR, CD180_C_DELAY); | |
453 | rc_out(bp, CD180_TDR, count); | |
9492e135 AC |
454 | port->break_length -= count; |
455 | if (port->break_length == 0) | |
1da177e4 LT |
456 | port->break_length--; |
457 | } else { | |
458 | rc_out(bp, CD180_TDR, CD180_C_ESC); | |
459 | rc_out(bp, CD180_TDR, CD180_C_EBRK); | |
460 | rc_out(bp, CD180_COR2, port->COR2); | |
461 | rc_wait_CCR(bp); | |
462 | rc_out(bp, CD180_CCR, CCR_CORCHG2); | |
463 | port->break_length = 0; | |
464 | } | |
465 | return; | |
466 | } | |
9492e135 | 467 | |
1da177e4 LT |
468 | count = CD180_NFIFO; |
469 | do { | |
470 | rc_out(bp, CD180_TDR, port->xmit_buf[port->xmit_tail++]); | |
471 | port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1); | |
472 | if (--port->xmit_cnt <= 0) | |
473 | break; | |
474 | } while (--count > 0); | |
9492e135 | 475 | |
1da177e4 LT |
476 | if (port->xmit_cnt <= 0) { |
477 | rc_out(bp, CD180_CAR, port_No(port)); | |
478 | port->IER &= ~IER_TXRDY; | |
479 | rc_out(bp, CD180_IER, port->IER); | |
480 | } | |
481 | if (port->xmit_cnt <= port->wakeup_chars) | |
b98e70de | 482 | tty_wakeup(tty); |
1da177e4 LT |
483 | } |
484 | ||
9492e135 | 485 | static void rc_check_modem(struct riscom_board const *bp) |
1da177e4 LT |
486 | { |
487 | struct riscom_port *port; | |
488 | struct tty_struct *tty; | |
489 | unsigned char mcr; | |
9492e135 AC |
490 | |
491 | port = rc_get_port(bp, "Modem"); | |
492 | if (port == NULL) | |
1da177e4 | 493 | return; |
9492e135 | 494 | |
1da177e4 | 495 | tty = port->tty; |
9492e135 | 496 | |
1da177e4 | 497 | mcr = rc_in(bp, CD180_MCR); |
9492e135 AC |
498 | if (mcr & MCR_CDCHG) { |
499 | if (rc_in(bp, CD180_MSVR) & MSVR_CD) | |
1da177e4 LT |
500 | wake_up_interruptible(&port->open_wait); |
501 | else | |
b98e70de | 502 | tty_hangup(tty); |
1da177e4 | 503 | } |
9492e135 | 504 | |
1da177e4 LT |
505 | #ifdef RISCOM_BRAIN_DAMAGED_CTS |
506 | if (mcr & MCR_CTSCHG) { | |
507 | if (rc_in(bp, CD180_MSVR) & MSVR_CTS) { | |
508 | tty->hw_stopped = 0; | |
509 | port->IER |= IER_TXRDY; | |
510 | if (port->xmit_cnt <= port->wakeup_chars) | |
b98e70de | 511 | tty_wakeup(tty); |
1da177e4 LT |
512 | } else { |
513 | tty->hw_stopped = 1; | |
514 | port->IER &= ~IER_TXRDY; | |
515 | } | |
516 | rc_out(bp, CD180_IER, port->IER); | |
517 | } | |
518 | if (mcr & MCR_DSRCHG) { | |
519 | if (rc_in(bp, CD180_MSVR) & MSVR_DSR) { | |
520 | tty->hw_stopped = 0; | |
521 | port->IER |= IER_TXRDY; | |
522 | if (port->xmit_cnt <= port->wakeup_chars) | |
b98e70de | 523 | tty_wakeup(tty); |
1da177e4 LT |
524 | } else { |
525 | tty->hw_stopped = 1; | |
526 | port->IER &= ~IER_TXRDY; | |
527 | } | |
528 | rc_out(bp, CD180_IER, port->IER); | |
529 | } | |
530 | #endif /* RISCOM_BRAIN_DAMAGED_CTS */ | |
9492e135 | 531 | |
1da177e4 LT |
532 | /* Clear change bits */ |
533 | rc_out(bp, CD180_MCR, 0); | |
534 | } | |
535 | ||
536 | /* The main interrupt processing routine */ | |
9492e135 | 537 | static irqreturn_t rc_interrupt(int dummy, void *dev_id) |
1da177e4 LT |
538 | { |
539 | unsigned char status; | |
540 | unsigned char ack; | |
f07ef395 | 541 | struct riscom_board *bp = dev_id; |
1da177e4 LT |
542 | unsigned long loop = 0; |
543 | int handled = 0; | |
544 | ||
c7bec5ab | 545 | if (!(bp->flags & RC_BOARD_ACTIVE)) |
1da177e4 | 546 | return IRQ_NONE; |
c7bec5ab | 547 | |
1da177e4 LT |
548 | while ((++loop < 16) && ((status = ~(rc_in(bp, RC_BSR))) & |
549 | (RC_BSR_TOUT | RC_BSR_TINT | | |
550 | RC_BSR_MINT | RC_BSR_RINT))) { | |
551 | handled = 1; | |
9492e135 | 552 | if (status & RC_BSR_TOUT) |
1da177e4 LT |
553 | printk(KERN_WARNING "rc%d: Got timeout. Hardware " |
554 | "error?\n", board_No(bp)); | |
1da177e4 LT |
555 | else if (status & RC_BSR_RINT) { |
556 | ack = rc_in(bp, RC_ACK_RINT); | |
1da177e4 LT |
557 | if (ack == (RC_ID | GIVR_IT_RCV)) |
558 | rc_receive(bp); | |
559 | else if (ack == (RC_ID | GIVR_IT_REXC)) | |
560 | rc_receive_exc(bp); | |
561 | else | |
562 | printk(KERN_WARNING "rc%d: Bad receive ack " | |
563 | "0x%02x.\n", | |
564 | board_No(bp), ack); | |
1da177e4 LT |
565 | } else if (status & RC_BSR_TINT) { |
566 | ack = rc_in(bp, RC_ACK_TINT); | |
1da177e4 LT |
567 | if (ack == (RC_ID | GIVR_IT_TX)) |
568 | rc_transmit(bp); | |
569 | else | |
570 | printk(KERN_WARNING "rc%d: Bad transmit ack " | |
571 | "0x%02x.\n", | |
572 | board_No(bp), ack); | |
1da177e4 LT |
573 | } else /* if (status & RC_BSR_MINT) */ { |
574 | ack = rc_in(bp, RC_ACK_MINT); | |
9492e135 | 575 | if (ack == (RC_ID | GIVR_IT_MODEM)) |
1da177e4 LT |
576 | rc_check_modem(bp); |
577 | else | |
578 | printk(KERN_WARNING "rc%d: Bad modem ack " | |
579 | "0x%02x.\n", | |
580 | board_No(bp), ack); | |
9492e135 | 581 | } |
1da177e4 LT |
582 | rc_out(bp, CD180_EOIR, 0); /* Mark end of interrupt */ |
583 | rc_out(bp, RC_CTOUT, 0); /* Clear timeout flag */ | |
584 | } | |
585 | return IRQ_RETVAL(handled); | |
586 | } | |
587 | ||
588 | /* | |
589 | * Routines for open & close processing. | |
590 | */ | |
591 | ||
592 | /* Called with disabled interrupts */ | |
9492e135 | 593 | static int rc_setup_board(struct riscom_board *bp) |
1da177e4 LT |
594 | { |
595 | int error; | |
596 | ||
9492e135 | 597 | if (bp->flags & RC_BOARD_ACTIVE) |
1da177e4 | 598 | return 0; |
9492e135 | 599 | |
0f2ed4c6 | 600 | error = request_irq(bp->irq, rc_interrupt, IRQF_DISABLED, |
f07ef395 | 601 | "RISCom/8", bp); |
9492e135 | 602 | if (error) |
1da177e4 | 603 | return error; |
9492e135 | 604 | |
1da177e4 LT |
605 | rc_out(bp, RC_CTOUT, 0); /* Just in case */ |
606 | bp->DTR = ~0; | |
607 | rc_out(bp, RC_DTR, bp->DTR); /* Drop DTR on all ports */ | |
9492e135 | 608 | |
1da177e4 | 609 | bp->flags |= RC_BOARD_ACTIVE; |
9492e135 | 610 | |
1da177e4 LT |
611 | return 0; |
612 | } | |
613 | ||
614 | /* Called with disabled interrupts */ | |
f07ef395 | 615 | static void rc_shutdown_board(struct riscom_board *bp) |
1da177e4 LT |
616 | { |
617 | if (!(bp->flags & RC_BOARD_ACTIVE)) | |
618 | return; | |
9492e135 | 619 | |
1da177e4 | 620 | bp->flags &= ~RC_BOARD_ACTIVE; |
9492e135 | 621 | |
1da177e4 | 622 | free_irq(bp->irq, NULL); |
9492e135 | 623 | |
1da177e4 LT |
624 | bp->DTR = ~0; |
625 | rc_out(bp, RC_DTR, bp->DTR); /* Drop DTR on all ports */ | |
9492e135 | 626 | |
1da177e4 LT |
627 | } |
628 | ||
629 | /* | |
9492e135 | 630 | * Setting up port characteristics. |
1da177e4 LT |
631 | * Must be called with disabled interrupts |
632 | */ | |
633 | static void rc_change_speed(struct riscom_board *bp, struct riscom_port *port) | |
634 | { | |
9492e135 | 635 | struct tty_struct *tty = port->tty; |
1da177e4 LT |
636 | unsigned long baud; |
637 | long tmp; | |
638 | unsigned char cor1 = 0, cor3 = 0; | |
639 | unsigned char mcor1 = 0, mcor2 = 0; | |
9492e135 AC |
640 | |
641 | if (tty == NULL || tty->termios == NULL) | |
1da177e4 LT |
642 | return; |
643 | ||
644 | port->IER = 0; | |
645 | port->COR2 = 0; | |
646 | port->MSVR = MSVR_RTS; | |
9492e135 | 647 | |
c7bce309 | 648 | baud = tty_get_baud_rate(tty); |
9492e135 | 649 | |
1da177e4 LT |
650 | /* Select port on the board */ |
651 | rc_out(bp, CD180_CAR, port_No(port)); | |
9492e135 | 652 | |
c7bce309 | 653 | if (!baud) { |
1da177e4 LT |
654 | /* Drop DTR & exit */ |
655 | bp->DTR |= (1u << port_No(port)); | |
656 | rc_out(bp, RC_DTR, bp->DTR); | |
657 | return; | |
658 | } else { | |
659 | /* Set DTR on */ | |
660 | bp->DTR &= ~(1u << port_No(port)); | |
661 | rc_out(bp, RC_DTR, bp->DTR); | |
662 | } | |
9492e135 | 663 | |
1da177e4 | 664 | /* |
9492e135 | 665 | * Now we must calculate some speed depended things |
1da177e4 | 666 | */ |
9492e135 | 667 | |
1da177e4 | 668 | /* Set baud rate for port */ |
c7bce309 | 669 | tmp = (((RC_OSCFREQ + baud/2) / baud + |
1da177e4 LT |
670 | CD180_TPC/2) / CD180_TPC); |
671 | ||
9492e135 AC |
672 | rc_out(bp, CD180_RBPRH, (tmp >> 8) & 0xff); |
673 | rc_out(bp, CD180_TBPRH, (tmp >> 8) & 0xff); | |
674 | rc_out(bp, CD180_RBPRL, tmp & 0xff); | |
1da177e4 | 675 | rc_out(bp, CD180_TBPRL, tmp & 0xff); |
9492e135 | 676 | |
c7bce309 | 677 | baud = (baud + 5) / 10; /* Estimated CPS */ |
9492e135 | 678 | |
1da177e4 | 679 | /* Two timer ticks seems enough to wakeup something like SLIP driver */ |
9492e135 | 680 | tmp = ((baud + HZ/2) / HZ) * 2 - CD180_NFIFO; |
1da177e4 LT |
681 | port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ? |
682 | SERIAL_XMIT_SIZE - 1 : tmp); | |
9492e135 | 683 | |
1da177e4 LT |
684 | /* Receiver timeout will be transmission time for 1.5 chars */ |
685 | tmp = (RISCOM_TPS + RISCOM_TPS/2 + baud/2) / baud; | |
686 | tmp = (tmp > 0xff) ? 0xff : tmp; | |
687 | rc_out(bp, CD180_RTPR, tmp); | |
9492e135 AC |
688 | |
689 | switch (C_CSIZE(tty)) { | |
690 | case CS5: | |
1da177e4 LT |
691 | cor1 |= COR1_5BITS; |
692 | break; | |
9492e135 | 693 | case CS6: |
1da177e4 LT |
694 | cor1 |= COR1_6BITS; |
695 | break; | |
9492e135 | 696 | case CS7: |
1da177e4 LT |
697 | cor1 |= COR1_7BITS; |
698 | break; | |
9492e135 | 699 | case CS8: |
1da177e4 LT |
700 | cor1 |= COR1_8BITS; |
701 | break; | |
702 | } | |
9492e135 | 703 | if (C_CSTOPB(tty)) |
1da177e4 | 704 | cor1 |= COR1_2SB; |
9492e135 | 705 | |
1da177e4 | 706 | cor1 |= COR1_IGNORE; |
9492e135 | 707 | if (C_PARENB(tty)) { |
1da177e4 | 708 | cor1 |= COR1_NORMPAR; |
9492e135 | 709 | if (C_PARODD(tty)) |
1da177e4 | 710 | cor1 |= COR1_ODDP; |
9492e135 | 711 | if (I_INPCK(tty)) |
1da177e4 LT |
712 | cor1 &= ~COR1_IGNORE; |
713 | } | |
714 | /* Set marking of some errors */ | |
715 | port->mark_mask = RCSR_OE | RCSR_TOUT; | |
9492e135 | 716 | if (I_INPCK(tty)) |
1da177e4 | 717 | port->mark_mask |= RCSR_FE | RCSR_PE; |
9492e135 | 718 | if (I_BRKINT(tty) || I_PARMRK(tty)) |
1da177e4 | 719 | port->mark_mask |= RCSR_BREAK; |
9492e135 | 720 | if (I_IGNPAR(tty)) |
1da177e4 | 721 | port->mark_mask &= ~(RCSR_FE | RCSR_PE); |
9492e135 | 722 | if (I_IGNBRK(tty)) { |
1da177e4 | 723 | port->mark_mask &= ~RCSR_BREAK; |
9492e135 | 724 | if (I_IGNPAR(tty)) |
1da177e4 LT |
725 | /* Real raw mode. Ignore all */ |
726 | port->mark_mask &= ~RCSR_OE; | |
727 | } | |
728 | /* Enable Hardware Flow Control */ | |
729 | if (C_CRTSCTS(tty)) { | |
730 | #ifdef RISCOM_BRAIN_DAMAGED_CTS | |
731 | port->IER |= IER_DSR | IER_CTS; | |
732 | mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD; | |
733 | mcor2 |= MCOR2_DSROD | MCOR2_CTSOD; | |
9492e135 AC |
734 | tty->hw_stopped = !(rc_in(bp, CD180_MSVR) & |
735 | (MSVR_CTS|MSVR_DSR)); | |
1da177e4 LT |
736 | #else |
737 | port->COR2 |= COR2_CTSAE; | |
738 | #endif | |
739 | } | |
740 | /* Enable Software Flow Control. FIXME: I'm not sure about this */ | |
741 | /* Some people reported that it works, but I still doubt */ | |
742 | if (I_IXON(tty)) { | |
743 | port->COR2 |= COR2_TXIBE; | |
744 | cor3 |= (COR3_FCT | COR3_SCDE); | |
745 | if (I_IXANY(tty)) | |
746 | port->COR2 |= COR2_IXM; | |
747 | rc_out(bp, CD180_SCHR1, START_CHAR(tty)); | |
748 | rc_out(bp, CD180_SCHR2, STOP_CHAR(tty)); | |
749 | rc_out(bp, CD180_SCHR3, START_CHAR(tty)); | |
750 | rc_out(bp, CD180_SCHR4, STOP_CHAR(tty)); | |
751 | } | |
752 | if (!C_CLOCAL(tty)) { | |
753 | /* Enable CD check */ | |
754 | port->IER |= IER_CD; | |
755 | mcor1 |= MCOR1_CDZD; | |
756 | mcor2 |= MCOR2_CDOD; | |
757 | } | |
9492e135 AC |
758 | |
759 | if (C_CREAD(tty)) | |
1da177e4 LT |
760 | /* Enable receiver */ |
761 | port->IER |= IER_RXD; | |
9492e135 | 762 | |
1da177e4 | 763 | /* Set input FIFO size (1-8 bytes) */ |
9492e135 | 764 | cor3 |= RISCOM_RXFIFO; |
1da177e4 LT |
765 | /* Setting up CD180 channel registers */ |
766 | rc_out(bp, CD180_COR1, cor1); | |
767 | rc_out(bp, CD180_COR2, port->COR2); | |
768 | rc_out(bp, CD180_COR3, cor3); | |
769 | /* Make CD180 know about registers change */ | |
770 | rc_wait_CCR(bp); | |
771 | rc_out(bp, CD180_CCR, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3); | |
772 | /* Setting up modem option registers */ | |
773 | rc_out(bp, CD180_MCOR1, mcor1); | |
774 | rc_out(bp, CD180_MCOR2, mcor2); | |
775 | /* Enable CD180 transmitter & receiver */ | |
776 | rc_wait_CCR(bp); | |
777 | rc_out(bp, CD180_CCR, CCR_TXEN | CCR_RXEN); | |
778 | /* Enable interrupts */ | |
779 | rc_out(bp, CD180_IER, port->IER); | |
780 | /* And finally set RTS on */ | |
781 | rc_out(bp, CD180_MSVR, port->MSVR); | |
782 | } | |
783 | ||
784 | /* Must be called with interrupts enabled */ | |
785 | static int rc_setup_port(struct riscom_board *bp, struct riscom_port *port) | |
786 | { | |
787 | unsigned long flags; | |
9492e135 | 788 | |
1da177e4 LT |
789 | if (port->flags & ASYNC_INITIALIZED) |
790 | return 0; | |
9492e135 | 791 | |
1da177e4 LT |
792 | if (!port->xmit_buf) { |
793 | /* We may sleep in get_zeroed_page() */ | |
9492e135 AC |
794 | unsigned long tmp = get_zeroed_page(GFP_KERNEL); |
795 | if (tmp == 0) | |
1da177e4 | 796 | return -ENOMEM; |
9492e135 | 797 | if (port->xmit_buf) |
1da177e4 | 798 | free_page(tmp); |
9492e135 AC |
799 | else |
800 | port->xmit_buf = (unsigned char *) tmp; | |
1da177e4 | 801 | } |
d9afa435 JG |
802 | spin_lock_irqsave(&riscom_lock, flags); |
803 | ||
9492e135 | 804 | if (port->tty) |
1da177e4 | 805 | clear_bit(TTY_IO_ERROR, &port->tty->flags); |
9492e135 | 806 | if (port->count == 1) |
1da177e4 | 807 | bp->count++; |
1da177e4 LT |
808 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; |
809 | rc_change_speed(bp, port); | |
810 | port->flags |= ASYNC_INITIALIZED; | |
9492e135 | 811 | |
d9afa435 | 812 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
813 | return 0; |
814 | } | |
815 | ||
816 | /* Must be called with interrupts disabled */ | |
817 | static void rc_shutdown_port(struct riscom_board *bp, struct riscom_port *port) | |
818 | { | |
819 | struct tty_struct *tty; | |
9492e135 AC |
820 | |
821 | if (!(port->flags & ASYNC_INITIALIZED)) | |
1da177e4 | 822 | return; |
9492e135 | 823 | |
1da177e4 LT |
824 | #ifdef RC_REPORT_OVERRUN |
825 | printk(KERN_INFO "rc%d: port %d: Total %ld overruns were detected.\n", | |
826 | board_No(bp), port_No(port), port->overrun); | |
9492e135 | 827 | #endif |
1da177e4 LT |
828 | #ifdef RC_REPORT_FIFO |
829 | { | |
830 | int i; | |
9492e135 | 831 | |
1da177e4 LT |
832 | printk(KERN_INFO "rc%d: port %d: FIFO hits [ ", |
833 | board_No(bp), port_No(port)); | |
9492e135 | 834 | for (i = 0; i < 10; i++) |
1da177e4 | 835 | printk("%ld ", port->hits[i]); |
1da177e4 LT |
836 | printk("].\n"); |
837 | } | |
9492e135 | 838 | #endif |
1da177e4 LT |
839 | if (port->xmit_buf) { |
840 | free_page((unsigned long) port->xmit_buf); | |
841 | port->xmit_buf = NULL; | |
842 | } | |
843 | ||
9492e135 AC |
844 | tty = port->tty; |
845 | ||
846 | if (tty == NULL || C_HUPCL(tty)) { | |
1da177e4 LT |
847 | /* Drop DTR */ |
848 | bp->DTR |= (1u << port_No(port)); | |
849 | rc_out(bp, RC_DTR, bp->DTR); | |
850 | } | |
9492e135 AC |
851 | |
852 | /* Select port */ | |
1da177e4 LT |
853 | rc_out(bp, CD180_CAR, port_No(port)); |
854 | /* Reset port */ | |
855 | rc_wait_CCR(bp); | |
856 | rc_out(bp, CD180_CCR, CCR_SOFTRESET); | |
857 | /* Disable all interrupts from this port */ | |
858 | port->IER = 0; | |
859 | rc_out(bp, CD180_IER, port->IER); | |
9492e135 AC |
860 | |
861 | if (tty) | |
1da177e4 LT |
862 | set_bit(TTY_IO_ERROR, &tty->flags); |
863 | port->flags &= ~ASYNC_INITIALIZED; | |
9492e135 | 864 | |
1da177e4 LT |
865 | if (--bp->count < 0) { |
866 | printk(KERN_INFO "rc%d: rc_shutdown_port: " | |
867 | "bad board count: %d\n", | |
868 | board_No(bp), bp->count); | |
869 | bp->count = 0; | |
870 | } | |
1da177e4 LT |
871 | /* |
872 | * If this is the last opened port on the board | |
873 | * shutdown whole board | |
874 | */ | |
9492e135 | 875 | if (!bp->count) |
1da177e4 LT |
876 | rc_shutdown_board(bp); |
877 | } | |
878 | ||
9492e135 | 879 | static int block_til_ready(struct tty_struct *tty, struct file *filp, |
1da177e4 LT |
880 | struct riscom_port *port) |
881 | { | |
882 | DECLARE_WAITQUEUE(wait, current); | |
883 | struct riscom_board *bp = port_Board(port); | |
884 | int retval; | |
885 | int do_clocal = 0; | |
886 | int CD; | |
d9afa435 | 887 | unsigned long flags; |
1da177e4 LT |
888 | |
889 | /* | |
890 | * If the device is in the middle of being closed, then block | |
891 | * until it's done, and then try again. | |
892 | */ | |
893 | if (tty_hung_up_p(filp) || port->flags & ASYNC_CLOSING) { | |
894 | interruptible_sleep_on(&port->close_wait); | |
895 | if (port->flags & ASYNC_HUP_NOTIFY) | |
896 | return -EAGAIN; | |
897 | else | |
898 | return -ERESTARTSYS; | |
899 | } | |
900 | ||
901 | /* | |
902 | * If non-blocking mode is set, or the port is not enabled, | |
903 | * then make the check up front and then exit. | |
904 | */ | |
905 | if ((filp->f_flags & O_NONBLOCK) || | |
906 | (tty->flags & (1 << TTY_IO_ERROR))) { | |
907 | port->flags |= ASYNC_NORMAL_ACTIVE; | |
908 | return 0; | |
909 | } | |
910 | ||
9492e135 | 911 | if (C_CLOCAL(tty)) |
1da177e4 LT |
912 | do_clocal = 1; |
913 | ||
914 | /* | |
915 | * Block waiting for the carrier detect and the line to become | |
916 | * free (i.e., not in use by the callout). While we are in | |
917 | * this loop, info->count is dropped by one, so that | |
918 | * rs_close() knows when to free things. We restore it upon | |
919 | * exit, either normal or abnormal. | |
920 | */ | |
921 | retval = 0; | |
922 | add_wait_queue(&port->open_wait, &wait); | |
d9afa435 JG |
923 | |
924 | spin_lock_irqsave(&riscom_lock, flags); | |
925 | ||
1da177e4 LT |
926 | if (!tty_hung_up_p(filp)) |
927 | port->count--; | |
d9afa435 JG |
928 | |
929 | spin_unlock_irqrestore(&riscom_lock, flags); | |
930 | ||
1da177e4 LT |
931 | port->blocked_open++; |
932 | while (1) { | |
d9afa435 JG |
933 | spin_lock_irqsave(&riscom_lock, flags); |
934 | ||
1da177e4 LT |
935 | rc_out(bp, CD180_CAR, port_No(port)); |
936 | CD = rc_in(bp, CD180_MSVR) & MSVR_CD; | |
937 | rc_out(bp, CD180_MSVR, MSVR_RTS); | |
938 | bp->DTR &= ~(1u << port_No(port)); | |
939 | rc_out(bp, RC_DTR, bp->DTR); | |
d9afa435 JG |
940 | |
941 | spin_unlock_irqrestore(&riscom_lock, flags); | |
942 | ||
1da177e4 LT |
943 | set_current_state(TASK_INTERRUPTIBLE); |
944 | if (tty_hung_up_p(filp) || | |
945 | !(port->flags & ASYNC_INITIALIZED)) { | |
946 | if (port->flags & ASYNC_HUP_NOTIFY) | |
947 | retval = -EAGAIN; | |
948 | else | |
9492e135 | 949 | retval = -ERESTARTSYS; |
1da177e4 LT |
950 | break; |
951 | } | |
952 | if (!(port->flags & ASYNC_CLOSING) && | |
953 | (do_clocal || CD)) | |
954 | break; | |
955 | if (signal_pending(current)) { | |
956 | retval = -ERESTARTSYS; | |
957 | break; | |
958 | } | |
959 | schedule(); | |
960 | } | |
cc0a8fbb | 961 | __set_current_state(TASK_RUNNING); |
1da177e4 LT |
962 | remove_wait_queue(&port->open_wait, &wait); |
963 | if (!tty_hung_up_p(filp)) | |
964 | port->count++; | |
965 | port->blocked_open--; | |
966 | if (retval) | |
967 | return retval; | |
9492e135 | 968 | |
1da177e4 LT |
969 | port->flags |= ASYNC_NORMAL_ACTIVE; |
970 | return 0; | |
9492e135 | 971 | } |
1da177e4 | 972 | |
9492e135 | 973 | static int rc_open(struct tty_struct *tty, struct file *filp) |
1da177e4 LT |
974 | { |
975 | int board; | |
976 | int error; | |
9492e135 AC |
977 | struct riscom_port *port; |
978 | struct riscom_board *bp; | |
979 | ||
1da177e4 LT |
980 | board = RC_BOARD(tty->index); |
981 | if (board >= RC_NBOARD || !(rc_board[board].flags & RC_BOARD_PRESENT)) | |
982 | return -ENODEV; | |
9492e135 | 983 | |
1da177e4 LT |
984 | bp = &rc_board[board]; |
985 | port = rc_port + board * RC_NPORT + RC_PORT(tty->index); | |
986 | if (rc_paranoia_check(port, tty->name, "rc_open")) | |
987 | return -ENODEV; | |
9492e135 AC |
988 | |
989 | error = rc_setup_board(bp); | |
990 | if (error) | |
1da177e4 | 991 | return error; |
9492e135 | 992 | |
1da177e4 LT |
993 | port->count++; |
994 | tty->driver_data = port; | |
995 | port->tty = tty; | |
9492e135 AC |
996 | |
997 | error = rc_setup_port(bp, port); | |
998 | if (error == 0) | |
999 | error = block_til_ready(tty, filp, port); | |
1000 | return error; | |
1da177e4 LT |
1001 | } |
1002 | ||
978e595f AC |
1003 | static void rc_flush_buffer(struct tty_struct *tty) |
1004 | { | |
1005 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1006 | unsigned long flags; | |
1007 | ||
1008 | if (rc_paranoia_check(port, tty->name, "rc_flush_buffer")) | |
1009 | return; | |
1010 | ||
1011 | spin_lock_irqsave(&riscom_lock, flags); | |
978e595f | 1012 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; |
978e595f AC |
1013 | spin_unlock_irqrestore(&riscom_lock, flags); |
1014 | ||
1015 | tty_wakeup(tty); | |
1016 | } | |
1017 | ||
9492e135 | 1018 | static void rc_close(struct tty_struct *tty, struct file *filp) |
1da177e4 LT |
1019 | { |
1020 | struct riscom_port *port = (struct riscom_port *) tty->driver_data; | |
1021 | struct riscom_board *bp; | |
1022 | unsigned long flags; | |
1023 | unsigned long timeout; | |
9492e135 | 1024 | |
1da177e4 LT |
1025 | if (!port || rc_paranoia_check(port, tty->name, "close")) |
1026 | return; | |
d9afa435 JG |
1027 | |
1028 | spin_lock_irqsave(&riscom_lock, flags); | |
1029 | ||
1da177e4 LT |
1030 | if (tty_hung_up_p(filp)) |
1031 | goto out; | |
9492e135 | 1032 | |
1da177e4 LT |
1033 | bp = port_Board(port); |
1034 | if ((tty->count == 1) && (port->count != 1)) { | |
1035 | printk(KERN_INFO "rc%d: rc_close: bad port count;" | |
1036 | " tty->count is 1, port count is %d\n", | |
1037 | board_No(bp), port->count); | |
1038 | port->count = 1; | |
1039 | } | |
1040 | if (--port->count < 0) { | |
1041 | printk(KERN_INFO "rc%d: rc_close: bad port count " | |
1042 | "for tty%d: %d\n", | |
1043 | board_No(bp), port_No(port), port->count); | |
1044 | port->count = 0; | |
1045 | } | |
1046 | if (port->count) | |
1047 | goto out; | |
1048 | port->flags |= ASYNC_CLOSING; | |
1049 | /* | |
9492e135 | 1050 | * Now we wait for the transmit buffer to clear; and we notify |
1da177e4 LT |
1051 | * the line discipline to only process XON/XOFF characters. |
1052 | */ | |
1053 | tty->closing = 1; | |
1054 | if (port->closing_wait != ASYNC_CLOSING_WAIT_NONE) | |
1055 | tty_wait_until_sent(tty, port->closing_wait); | |
1056 | /* | |
1057 | * At this point we stop accepting input. To do this, we | |
1058 | * disable the receive line status interrupts, and tell the | |
1059 | * interrupt driver to stop checking the data ready bit in the | |
1060 | * line status register. | |
1061 | */ | |
1062 | port->IER &= ~IER_RXD; | |
1063 | if (port->flags & ASYNC_INITIALIZED) { | |
1064 | port->IER &= ~IER_TXRDY; | |
1065 | port->IER |= IER_TXEMPTY; | |
1066 | rc_out(bp, CD180_CAR, port_No(port)); | |
1067 | rc_out(bp, CD180_IER, port->IER); | |
1068 | /* | |
1069 | * Before we drop DTR, make sure the UART transmitter | |
1070 | * has completely drained; this is especially | |
1071 | * important if there is a transmit FIFO! | |
1072 | */ | |
9492e135 AC |
1073 | timeout = jiffies + HZ; |
1074 | while (port->IER & IER_TXEMPTY) { | |
1da177e4 LT |
1075 | msleep_interruptible(jiffies_to_msecs(port->timeout)); |
1076 | if (time_after(jiffies, timeout)) | |
1077 | break; | |
1078 | } | |
1079 | } | |
1080 | rc_shutdown_port(bp, port); | |
978e595f | 1081 | rc_flush_buffer(tty); |
1da177e4 LT |
1082 | tty_ldisc_flush(tty); |
1083 | ||
1084 | tty->closing = 0; | |
1da177e4 LT |
1085 | port->tty = NULL; |
1086 | if (port->blocked_open) { | |
9492e135 | 1087 | if (port->close_delay) |
1da177e4 | 1088 | msleep_interruptible(jiffies_to_msecs(port->close_delay)); |
1da177e4 LT |
1089 | wake_up_interruptible(&port->open_wait); |
1090 | } | |
1091 | port->flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); | |
1092 | wake_up_interruptible(&port->close_wait); | |
d9afa435 JG |
1093 | |
1094 | out: | |
1095 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
1096 | } |
1097 | ||
9492e135 | 1098 | static int rc_write(struct tty_struct *tty, |
1da177e4 LT |
1099 | const unsigned char *buf, int count) |
1100 | { | |
1101 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1102 | struct riscom_board *bp; | |
1103 | int c, total = 0; | |
1104 | unsigned long flags; | |
9492e135 | 1105 | |
1da177e4 LT |
1106 | if (rc_paranoia_check(port, tty->name, "rc_write")) |
1107 | return 0; | |
9492e135 | 1108 | |
1da177e4 LT |
1109 | bp = port_Board(port); |
1110 | ||
b3218a79 | 1111 | if (!tty || !port->xmit_buf) |
1da177e4 LT |
1112 | return 0; |
1113 | ||
1da177e4 | 1114 | while (1) { |
d9afa435 JG |
1115 | spin_lock_irqsave(&riscom_lock, flags); |
1116 | ||
1da177e4 LT |
1117 | c = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1, |
1118 | SERIAL_XMIT_SIZE - port->xmit_head)); | |
d9afa435 JG |
1119 | if (c <= 0) |
1120 | break; /* lock continues to be held */ | |
1da177e4 LT |
1121 | |
1122 | memcpy(port->xmit_buf + port->xmit_head, buf, c); | |
1123 | port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1); | |
1124 | port->xmit_cnt += c; | |
d9afa435 JG |
1125 | |
1126 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
1127 | |
1128 | buf += c; | |
1129 | count -= c; | |
1130 | total += c; | |
1131 | } | |
1132 | ||
1da177e4 LT |
1133 | if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped && |
1134 | !(port->IER & IER_TXRDY)) { | |
1135 | port->IER |= IER_TXRDY; | |
1136 | rc_out(bp, CD180_CAR, port_No(port)); | |
1137 | rc_out(bp, CD180_IER, port->IER); | |
1138 | } | |
d9afa435 JG |
1139 | |
1140 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
1141 | |
1142 | return total; | |
1143 | } | |
1144 | ||
9492e135 | 1145 | static int rc_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 LT |
1146 | { |
1147 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1148 | unsigned long flags; | |
bbbbb96f | 1149 | int ret = 0; |
1da177e4 LT |
1150 | |
1151 | if (rc_paranoia_check(port, tty->name, "rc_put_char")) | |
bbbbb96f | 1152 | return 0; |
1da177e4 LT |
1153 | |
1154 | if (!tty || !port->xmit_buf) | |
bbbbb96f | 1155 | return 0; |
1da177e4 | 1156 | |
d9afa435 | 1157 | spin_lock_irqsave(&riscom_lock, flags); |
9492e135 | 1158 | |
1da177e4 LT |
1159 | if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) |
1160 | goto out; | |
1161 | ||
1162 | port->xmit_buf[port->xmit_head++] = ch; | |
1163 | port->xmit_head &= SERIAL_XMIT_SIZE - 1; | |
1164 | port->xmit_cnt++; | |
bbbbb96f | 1165 | ret = 1; |
d9afa435 JG |
1166 | |
1167 | out: | |
1168 | spin_unlock_irqrestore(&riscom_lock, flags); | |
bbbbb96f | 1169 | return ret; |
1da177e4 LT |
1170 | } |
1171 | ||
9492e135 | 1172 | static void rc_flush_chars(struct tty_struct *tty) |
1da177e4 LT |
1173 | { |
1174 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1175 | unsigned long flags; | |
9492e135 | 1176 | |
1da177e4 LT |
1177 | if (rc_paranoia_check(port, tty->name, "rc_flush_chars")) |
1178 | return; | |
9492e135 | 1179 | |
1da177e4 LT |
1180 | if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || |
1181 | !port->xmit_buf) | |
1182 | return; | |
1183 | ||
d9afa435 JG |
1184 | spin_lock_irqsave(&riscom_lock, flags); |
1185 | ||
1da177e4 LT |
1186 | port->IER |= IER_TXRDY; |
1187 | rc_out(port_Board(port), CD180_CAR, port_No(port)); | |
1188 | rc_out(port_Board(port), CD180_IER, port->IER); | |
d9afa435 JG |
1189 | |
1190 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
1191 | } |
1192 | ||
9492e135 | 1193 | static int rc_write_room(struct tty_struct *tty) |
1da177e4 LT |
1194 | { |
1195 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1196 | int ret; | |
9492e135 | 1197 | |
1da177e4 LT |
1198 | if (rc_paranoia_check(port, tty->name, "rc_write_room")) |
1199 | return 0; | |
1200 | ||
1201 | ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; | |
1202 | if (ret < 0) | |
1203 | ret = 0; | |
1204 | return ret; | |
1205 | } | |
1206 | ||
1207 | static int rc_chars_in_buffer(struct tty_struct *tty) | |
1208 | { | |
1209 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
9492e135 | 1210 | |
1da177e4 LT |
1211 | if (rc_paranoia_check(port, tty->name, "rc_chars_in_buffer")) |
1212 | return 0; | |
9492e135 | 1213 | |
1da177e4 LT |
1214 | return port->xmit_cnt; |
1215 | } | |
1216 | ||
1da177e4 LT |
1217 | static int rc_tiocmget(struct tty_struct *tty, struct file *file) |
1218 | { | |
1219 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
9492e135 | 1220 | struct riscom_board *bp; |
1da177e4 LT |
1221 | unsigned char status; |
1222 | unsigned int result; | |
1223 | unsigned long flags; | |
1224 | ||
bf9d8929 | 1225 | if (rc_paranoia_check(port, tty->name, __func__)) |
1da177e4 LT |
1226 | return -ENODEV; |
1227 | ||
1228 | bp = port_Board(port); | |
d9afa435 JG |
1229 | |
1230 | spin_lock_irqsave(&riscom_lock, flags); | |
1231 | ||
1da177e4 LT |
1232 | rc_out(bp, CD180_CAR, port_No(port)); |
1233 | status = rc_in(bp, CD180_MSVR); | |
1234 | result = rc_in(bp, RC_RI) & (1u << port_No(port)) ? 0 : TIOCM_RNG; | |
d9afa435 JG |
1235 | |
1236 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1237 | ||
1da177e4 LT |
1238 | result |= ((status & MSVR_RTS) ? TIOCM_RTS : 0) |
1239 | | ((status & MSVR_DTR) ? TIOCM_DTR : 0) | |
1240 | | ((status & MSVR_CD) ? TIOCM_CAR : 0) | |
1241 | | ((status & MSVR_DSR) ? TIOCM_DSR : 0) | |
1242 | | ((status & MSVR_CTS) ? TIOCM_CTS : 0); | |
1243 | return result; | |
1244 | } | |
1245 | ||
1246 | static int rc_tiocmset(struct tty_struct *tty, struct file *file, | |
1247 | unsigned int set, unsigned int clear) | |
1248 | { | |
1249 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1250 | unsigned long flags; | |
1251 | struct riscom_board *bp; | |
1252 | ||
bf9d8929 | 1253 | if (rc_paranoia_check(port, tty->name, __func__)) |
1da177e4 LT |
1254 | return -ENODEV; |
1255 | ||
1256 | bp = port_Board(port); | |
1257 | ||
d9afa435 JG |
1258 | spin_lock_irqsave(&riscom_lock, flags); |
1259 | ||
1da177e4 LT |
1260 | if (set & TIOCM_RTS) |
1261 | port->MSVR |= MSVR_RTS; | |
1262 | if (set & TIOCM_DTR) | |
1263 | bp->DTR &= ~(1u << port_No(port)); | |
1264 | ||
1265 | if (clear & TIOCM_RTS) | |
1266 | port->MSVR &= ~MSVR_RTS; | |
1267 | if (clear & TIOCM_DTR) | |
1268 | bp->DTR |= (1u << port_No(port)); | |
1269 | ||
1270 | rc_out(bp, CD180_CAR, port_No(port)); | |
1271 | rc_out(bp, CD180_MSVR, port->MSVR); | |
1272 | rc_out(bp, RC_DTR, bp->DTR); | |
d9afa435 JG |
1273 | |
1274 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1275 | ||
1da177e4 LT |
1276 | return 0; |
1277 | } | |
1278 | ||
9492e135 | 1279 | static void rc_send_break(struct riscom_port *port, unsigned long length) |
1da177e4 LT |
1280 | { |
1281 | struct riscom_board *bp = port_Board(port); | |
1282 | unsigned long flags; | |
9492e135 | 1283 | |
d9afa435 JG |
1284 | spin_lock_irqsave(&riscom_lock, flags); |
1285 | ||
1da177e4 LT |
1286 | port->break_length = RISCOM_TPS / HZ * length; |
1287 | port->COR2 |= COR2_ETC; | |
1288 | port->IER |= IER_TXRDY; | |
1289 | rc_out(bp, CD180_CAR, port_No(port)); | |
1290 | rc_out(bp, CD180_COR2, port->COR2); | |
1291 | rc_out(bp, CD180_IER, port->IER); | |
1292 | rc_wait_CCR(bp); | |
1293 | rc_out(bp, CD180_CCR, CCR_CORCHG2); | |
1294 | rc_wait_CCR(bp); | |
d9afa435 JG |
1295 | |
1296 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
1297 | } |
1298 | ||
9492e135 AC |
1299 | static int rc_set_serial_info(struct riscom_port *port, |
1300 | struct serial_struct __user *newinfo) | |
1da177e4 LT |
1301 | { |
1302 | struct serial_struct tmp; | |
1303 | struct riscom_board *bp = port_Board(port); | |
1304 | int change_speed; | |
9492e135 | 1305 | |
1da177e4 LT |
1306 | if (copy_from_user(&tmp, newinfo, sizeof(tmp))) |
1307 | return -EFAULT; | |
9492e135 AC |
1308 | |
1309 | #if 0 | |
1da177e4 LT |
1310 | if ((tmp.irq != bp->irq) || |
1311 | (tmp.port != bp->base) || | |
1312 | (tmp.type != PORT_CIRRUS) || | |
1313 | (tmp.baud_base != (RC_OSCFREQ + CD180_TPC/2) / CD180_TPC) || | |
1314 | (tmp.custom_divisor != 0) || | |
1315 | (tmp.xmit_fifo_size != CD180_NFIFO) || | |
1316 | (tmp.flags & ~RISCOM_LEGAL_FLAGS)) | |
1317 | return -EINVAL; | |
9492e135 AC |
1318 | #endif |
1319 | ||
1da177e4 LT |
1320 | change_speed = ((port->flags & ASYNC_SPD_MASK) != |
1321 | (tmp.flags & ASYNC_SPD_MASK)); | |
9492e135 | 1322 | |
1da177e4 LT |
1323 | if (!capable(CAP_SYS_ADMIN)) { |
1324 | if ((tmp.close_delay != port->close_delay) || | |
1325 | (tmp.closing_wait != port->closing_wait) || | |
1326 | ((tmp.flags & ~ASYNC_USR_MASK) != | |
9492e135 | 1327 | (port->flags & ~ASYNC_USR_MASK))) |
1da177e4 LT |
1328 | return -EPERM; |
1329 | port->flags = ((port->flags & ~ASYNC_USR_MASK) | | |
1330 | (tmp.flags & ASYNC_USR_MASK)); | |
1331 | } else { | |
1332 | port->flags = ((port->flags & ~ASYNC_FLAGS) | | |
1333 | (tmp.flags & ASYNC_FLAGS)); | |
1334 | port->close_delay = tmp.close_delay; | |
1335 | port->closing_wait = tmp.closing_wait; | |
1336 | } | |
1337 | if (change_speed) { | |
d9afa435 JG |
1338 | unsigned long flags; |
1339 | ||
1340 | spin_lock_irqsave(&riscom_lock, flags); | |
1da177e4 | 1341 | rc_change_speed(bp, port); |
d9afa435 | 1342 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1343 | } |
1344 | return 0; | |
1345 | } | |
1346 | ||
9492e135 | 1347 | static int rc_get_serial_info(struct riscom_port *port, |
1da177e4 LT |
1348 | struct serial_struct __user *retinfo) |
1349 | { | |
1350 | struct serial_struct tmp; | |
1351 | struct riscom_board *bp = port_Board(port); | |
9492e135 | 1352 | |
1da177e4 LT |
1353 | memset(&tmp, 0, sizeof(tmp)); |
1354 | tmp.type = PORT_CIRRUS; | |
1355 | tmp.line = port - rc_port; | |
1356 | tmp.port = bp->base; | |
1357 | tmp.irq = bp->irq; | |
1358 | tmp.flags = port->flags; | |
1359 | tmp.baud_base = (RC_OSCFREQ + CD180_TPC/2) / CD180_TPC; | |
1360 | tmp.close_delay = port->close_delay * HZ/100; | |
1361 | tmp.closing_wait = port->closing_wait * HZ/100; | |
1362 | tmp.xmit_fifo_size = CD180_NFIFO; | |
1363 | return copy_to_user(retinfo, &tmp, sizeof(tmp)) ? -EFAULT : 0; | |
1364 | } | |
1365 | ||
9492e135 | 1366 | static int rc_ioctl(struct tty_struct *tty, struct file *filp, |
1da177e4 | 1367 | unsigned int cmd, unsigned long arg) |
1da177e4 LT |
1368 | { |
1369 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1370 | void __user *argp = (void __user *)arg; | |
eb174552 | 1371 | int retval = 0; |
9492e135 | 1372 | |
1da177e4 LT |
1373 | if (rc_paranoia_check(port, tty->name, "rc_ioctl")) |
1374 | return -ENODEV; | |
9492e135 | 1375 | |
1da177e4 | 1376 | switch (cmd) { |
9492e135 | 1377 | case TCSBRK: /* SVID version: non-zero arg --> no break */ |
1da177e4 LT |
1378 | retval = tty_check_change(tty); |
1379 | if (retval) | |
1380 | return retval; | |
1381 | tty_wait_until_sent(tty, 0); | |
1382 | if (!arg) | |
1383 | rc_send_break(port, HZ/4); /* 1/4 second */ | |
1384 | break; | |
9492e135 | 1385 | case TCSBRKP: /* support for POSIX tcsendbreak() */ |
1da177e4 LT |
1386 | retval = tty_check_change(tty); |
1387 | if (retval) | |
1388 | return retval; | |
1389 | tty_wait_until_sent(tty, 0); | |
1390 | rc_send_break(port, arg ? arg*(HZ/10) : HZ/4); | |
1391 | break; | |
9492e135 AC |
1392 | case TIOCGSERIAL: |
1393 | lock_kernel(); | |
eb174552 AC |
1394 | retval = rc_get_serial_info(port, argp); |
1395 | unlock_kernel(); | |
1da177e4 | 1396 | break; |
9492e135 AC |
1397 | case TIOCSSERIAL: |
1398 | lock_kernel(); | |
eb174552 AC |
1399 | retval = rc_set_serial_info(port, argp); |
1400 | unlock_kernel(); | |
1401 | break; | |
9492e135 | 1402 | default: |
eb174552 | 1403 | retval = -ENOIOCTLCMD; |
1da177e4 | 1404 | } |
eb174552 | 1405 | return retval; |
1da177e4 LT |
1406 | } |
1407 | ||
9492e135 | 1408 | static void rc_throttle(struct tty_struct *tty) |
1da177e4 LT |
1409 | { |
1410 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1411 | struct riscom_board *bp; | |
1412 | unsigned long flags; | |
9492e135 | 1413 | |
1da177e4 LT |
1414 | if (rc_paranoia_check(port, tty->name, "rc_throttle")) |
1415 | return; | |
1da177e4 | 1416 | bp = port_Board(port); |
d9afa435 JG |
1417 | |
1418 | spin_lock_irqsave(&riscom_lock, flags); | |
1da177e4 LT |
1419 | port->MSVR &= ~MSVR_RTS; |
1420 | rc_out(bp, CD180_CAR, port_No(port)); | |
d9afa435 | 1421 | if (I_IXOFF(tty)) { |
1da177e4 LT |
1422 | rc_wait_CCR(bp); |
1423 | rc_out(bp, CD180_CCR, CCR_SSCH2); | |
1424 | rc_wait_CCR(bp); | |
1425 | } | |
1426 | rc_out(bp, CD180_MSVR, port->MSVR); | |
d9afa435 | 1427 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1428 | } |
1429 | ||
9492e135 | 1430 | static void rc_unthrottle(struct tty_struct *tty) |
1da177e4 LT |
1431 | { |
1432 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1433 | struct riscom_board *bp; | |
1434 | unsigned long flags; | |
9492e135 | 1435 | |
1da177e4 LT |
1436 | if (rc_paranoia_check(port, tty->name, "rc_unthrottle")) |
1437 | return; | |
1da177e4 | 1438 | bp = port_Board(port); |
d9afa435 | 1439 | |
9492e135 | 1440 | spin_lock_irqsave(&riscom_lock, flags); |
1da177e4 LT |
1441 | port->MSVR |= MSVR_RTS; |
1442 | rc_out(bp, CD180_CAR, port_No(port)); | |
1443 | if (I_IXOFF(tty)) { | |
1444 | rc_wait_CCR(bp); | |
1445 | rc_out(bp, CD180_CCR, CCR_SSCH1); | |
1446 | rc_wait_CCR(bp); | |
1447 | } | |
1448 | rc_out(bp, CD180_MSVR, port->MSVR); | |
d9afa435 | 1449 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1450 | } |
1451 | ||
9492e135 | 1452 | static void rc_stop(struct tty_struct *tty) |
1da177e4 LT |
1453 | { |
1454 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1455 | struct riscom_board *bp; | |
1456 | unsigned long flags; | |
9492e135 | 1457 | |
1da177e4 LT |
1458 | if (rc_paranoia_check(port, tty->name, "rc_stop")) |
1459 | return; | |
9492e135 | 1460 | |
1da177e4 | 1461 | bp = port_Board(port); |
d9afa435 | 1462 | |
9492e135 | 1463 | spin_lock_irqsave(&riscom_lock, flags); |
1da177e4 LT |
1464 | port->IER &= ~IER_TXRDY; |
1465 | rc_out(bp, CD180_CAR, port_No(port)); | |
1466 | rc_out(bp, CD180_IER, port->IER); | |
d9afa435 | 1467 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1468 | } |
1469 | ||
9492e135 | 1470 | static void rc_start(struct tty_struct *tty) |
1da177e4 LT |
1471 | { |
1472 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1473 | struct riscom_board *bp; | |
1474 | unsigned long flags; | |
9492e135 | 1475 | |
1da177e4 LT |
1476 | if (rc_paranoia_check(port, tty->name, "rc_start")) |
1477 | return; | |
9492e135 | 1478 | |
1da177e4 | 1479 | bp = port_Board(port); |
9492e135 | 1480 | |
d9afa435 JG |
1481 | spin_lock_irqsave(&riscom_lock, flags); |
1482 | ||
9492e135 | 1483 | if (port->xmit_cnt && port->xmit_buf && !(port->IER & IER_TXRDY)) { |
1da177e4 LT |
1484 | port->IER |= IER_TXRDY; |
1485 | rc_out(bp, CD180_CAR, port_No(port)); | |
1486 | rc_out(bp, CD180_IER, port->IER); | |
1487 | } | |
d9afa435 | 1488 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1489 | } |
1490 | ||
9492e135 | 1491 | static void rc_hangup(struct tty_struct *tty) |
1da177e4 LT |
1492 | { |
1493 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1494 | struct riscom_board *bp; | |
9492e135 | 1495 | |
1da177e4 LT |
1496 | if (rc_paranoia_check(port, tty->name, "rc_hangup")) |
1497 | return; | |
9492e135 | 1498 | |
1da177e4 | 1499 | bp = port_Board(port); |
9492e135 | 1500 | |
1da177e4 | 1501 | rc_shutdown_port(bp, port); |
1da177e4 LT |
1502 | port->count = 0; |
1503 | port->flags &= ~ASYNC_NORMAL_ACTIVE; | |
1504 | port->tty = NULL; | |
1505 | wake_up_interruptible(&port->open_wait); | |
1506 | } | |
1507 | ||
9492e135 AC |
1508 | static void rc_set_termios(struct tty_struct *tty, |
1509 | struct ktermios *old_termios) | |
1da177e4 LT |
1510 | { |
1511 | struct riscom_port *port = (struct riscom_port *)tty->driver_data; | |
1512 | unsigned long flags; | |
9492e135 | 1513 | |
1da177e4 LT |
1514 | if (rc_paranoia_check(port, tty->name, "rc_set_termios")) |
1515 | return; | |
1da177e4 | 1516 | |
d9afa435 | 1517 | spin_lock_irqsave(&riscom_lock, flags); |
1da177e4 | 1518 | rc_change_speed(port_Board(port), port); |
d9afa435 | 1519 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1520 | |
1521 | if ((old_termios->c_cflag & CRTSCTS) && | |
1522 | !(tty->termios->c_cflag & CRTSCTS)) { | |
1523 | tty->hw_stopped = 0; | |
1524 | rc_start(tty); | |
1525 | } | |
1526 | } | |
1527 | ||
b68e31d0 | 1528 | static const struct tty_operations riscom_ops = { |
1da177e4 LT |
1529 | .open = rc_open, |
1530 | .close = rc_close, | |
1531 | .write = rc_write, | |
1532 | .put_char = rc_put_char, | |
1533 | .flush_chars = rc_flush_chars, | |
1534 | .write_room = rc_write_room, | |
1535 | .chars_in_buffer = rc_chars_in_buffer, | |
1536 | .flush_buffer = rc_flush_buffer, | |
1537 | .ioctl = rc_ioctl, | |
1538 | .throttle = rc_throttle, | |
1539 | .unthrottle = rc_unthrottle, | |
1540 | .set_termios = rc_set_termios, | |
1541 | .stop = rc_stop, | |
1542 | .start = rc_start, | |
1543 | .hangup = rc_hangup, | |
1544 | .tiocmget = rc_tiocmget, | |
1545 | .tiocmset = rc_tiocmset, | |
1546 | }; | |
1547 | ||
1386a820 | 1548 | static int __init rc_init_drivers(void) |
1da177e4 LT |
1549 | { |
1550 | int error; | |
1551 | int i; | |
1552 | ||
1553 | riscom_driver = alloc_tty_driver(RC_NBOARD * RC_NPORT); | |
9492e135 | 1554 | if (!riscom_driver) |
1da177e4 | 1555 | return -ENOMEM; |
9492e135 | 1556 | |
1da177e4 LT |
1557 | riscom_driver->owner = THIS_MODULE; |
1558 | riscom_driver->name = "ttyL"; | |
1da177e4 LT |
1559 | riscom_driver->major = RISCOM8_NORMAL_MAJOR; |
1560 | riscom_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1561 | riscom_driver->subtype = SERIAL_TYPE_NORMAL; | |
1562 | riscom_driver->init_termios = tty_std_termios; | |
1563 | riscom_driver->init_termios.c_cflag = | |
1564 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
606d099c AC |
1565 | riscom_driver->init_termios.c_ispeed = 9600; |
1566 | riscom_driver->init_termios.c_ospeed = 9600; | |
1da177e4 LT |
1567 | riscom_driver->flags = TTY_DRIVER_REAL_RAW; |
1568 | tty_set_operations(riscom_driver, &riscom_ops); | |
9492e135 AC |
1569 | error = tty_register_driver(riscom_driver); |
1570 | if (error != 0) { | |
1da177e4 LT |
1571 | put_tty_driver(riscom_driver); |
1572 | printk(KERN_ERR "rc: Couldn't register RISCom/8 driver, " | |
9492e135 | 1573 | "error = %d\n", error); |
1da177e4 LT |
1574 | return 1; |
1575 | } | |
1da177e4 LT |
1576 | memset(rc_port, 0, sizeof(rc_port)); |
1577 | for (i = 0; i < RC_NPORT * RC_NBOARD; i++) { | |
1578 | rc_port[i].magic = RISCOM8_MAGIC; | |
9492e135 AC |
1579 | rc_port[i].close_delay = 50 * HZ / 100; |
1580 | rc_port[i].closing_wait = 3000 * HZ / 100; | |
1da177e4 LT |
1581 | init_waitqueue_head(&rc_port[i].open_wait); |
1582 | init_waitqueue_head(&rc_port[i].close_wait); | |
1583 | } | |
1da177e4 LT |
1584 | return 0; |
1585 | } | |
1586 | ||
1587 | static void rc_release_drivers(void) | |
1588 | { | |
1da177e4 LT |
1589 | tty_unregister_driver(riscom_driver); |
1590 | put_tty_driver(riscom_driver); | |
1da177e4 LT |
1591 | } |
1592 | ||
1593 | #ifndef MODULE | |
1594 | /* | |
1595 | * Called at boot time. | |
9492e135 | 1596 | * |
1da177e4 LT |
1597 | * You can specify IO base for up to RC_NBOARD cards, |
1598 | * using line "riscom8=0xiobase1,0xiobase2,.." at LILO prompt. | |
1599 | * Note that there will be no probing at default | |
1600 | * addresses in this case. | |
1601 | * | |
9492e135 | 1602 | */ |
1da177e4 LT |
1603 | static int __init riscom8_setup(char *str) |
1604 | { | |
1605 | int ints[RC_NBOARD]; | |
1606 | int i; | |
1607 | ||
1608 | str = get_options(str, ARRAY_SIZE(ints), ints); | |
1609 | ||
1610 | for (i = 0; i < RC_NBOARD; i++) { | |
1611 | if (i < ints[0]) | |
1612 | rc_board[i].base = ints[i+1]; | |
9492e135 | 1613 | else |
1da177e4 LT |
1614 | rc_board[i].base = 0; |
1615 | } | |
1616 | return 1; | |
1617 | } | |
1618 | ||
1619 | __setup("riscom8=", riscom8_setup); | |
1620 | #endif | |
1621 | ||
1622 | static char banner[] __initdata = | |
1623 | KERN_INFO "rc: SDL RISCom/8 card driver v1.1, (c) D.Gorodchanin " | |
1624 | "1994-1996.\n"; | |
1625 | static char no_boards_msg[] __initdata = | |
1626 | KERN_INFO "rc: No RISCom/8 boards detected.\n"; | |
1627 | ||
9492e135 AC |
1628 | /* |
1629 | * This routine must be called by kernel at boot time | |
1da177e4 LT |
1630 | */ |
1631 | static int __init riscom8_init(void) | |
1632 | { | |
1633 | int i; | |
1634 | int found = 0; | |
1635 | ||
1636 | printk(banner); | |
1637 | ||
9492e135 | 1638 | if (rc_init_drivers()) |
1da177e4 LT |
1639 | return -EIO; |
1640 | ||
9492e135 AC |
1641 | for (i = 0; i < RC_NBOARD; i++) |
1642 | if (rc_board[i].base && !rc_probe(&rc_board[i])) | |
1da177e4 | 1643 | found++; |
1da177e4 LT |
1644 | if (!found) { |
1645 | rc_release_drivers(); | |
1646 | printk(no_boards_msg); | |
1647 | return -EIO; | |
1648 | } | |
1649 | return 0; | |
1650 | } | |
1651 | ||
1652 | #ifdef MODULE | |
1653 | static int iobase; | |
1654 | static int iobase1; | |
1655 | static int iobase2; | |
1656 | static int iobase3; | |
8d3b33f6 RR |
1657 | module_param(iobase, int, 0); |
1658 | module_param(iobase1, int, 0); | |
1659 | module_param(iobase2, int, 0); | |
1660 | module_param(iobase3, int, 0); | |
1da177e4 LT |
1661 | |
1662 | MODULE_LICENSE("GPL"); | |
1663 | #endif /* MODULE */ | |
1664 | ||
1665 | /* | |
1666 | * You can setup up to 4 boards (current value of RC_NBOARD) | |
1667 | * by specifying "iobase=0xXXX iobase1=0xXXX ..." as insmod parameter. | |
1668 | * | |
1669 | */ | |
9492e135 | 1670 | static int __init riscom8_init_module(void) |
1da177e4 LT |
1671 | { |
1672 | #ifdef MODULE | |
1673 | int i; | |
1674 | ||
1675 | if (iobase || iobase1 || iobase2 || iobase3) { | |
9492e135 | 1676 | for (i = 0; i < RC_NBOARD; i++) |
9efda797 | 1677 | rc_board[i].base = 0; |
1da177e4 LT |
1678 | } |
1679 | ||
1680 | if (iobase) | |
1681 | rc_board[0].base = iobase; | |
1682 | if (iobase1) | |
1683 | rc_board[1].base = iobase1; | |
1684 | if (iobase2) | |
1685 | rc_board[2].base = iobase2; | |
1686 | if (iobase3) | |
1687 | rc_board[3].base = iobase3; | |
1688 | #endif /* MODULE */ | |
1689 | ||
1690 | return riscom8_init(); | |
1691 | } | |
9492e135 AC |
1692 | |
1693 | static void __exit riscom8_exit_module(void) | |
1da177e4 LT |
1694 | { |
1695 | int i; | |
9492e135 | 1696 | |
1da177e4 | 1697 | rc_release_drivers(); |
9492e135 AC |
1698 | for (i = 0; i < RC_NBOARD; i++) |
1699 | if (rc_board[i].flags & RC_BOARD_PRESENT) | |
1da177e4 | 1700 | rc_release_io_range(&rc_board[i]); |
9492e135 | 1701 | |
1da177e4 LT |
1702 | } |
1703 | ||
1704 | module_init(riscom8_init_module); | |
1705 | module_exit(riscom8_exit_module); |