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> |
405f5571 | 50 | #include <linux/smp_lock.h> |
d9afa435 | 51 | #include <linux/spinlock.h> |
5c9f5806 | 52 | #include <linux/device.h> |
1da177e4 | 53 | |
9492e135 | 54 | #include <linux/uaccess.h> |
1da177e4 LT |
55 | |
56 | #include "riscom8.h" | |
57 | #include "riscom8_reg.h" | |
58 | ||
59 | /* Am I paranoid or not ? ;-) */ | |
60 | #define RISCOM_PARANOIA_CHECK | |
61 | ||
9492e135 AC |
62 | /* |
63 | * Crazy InteliCom/8 boards sometimes have swapped CTS & DSR signals. | |
1da177e4 | 64 | * You can slightly speed up things by #undefing the following option, |
9492e135 | 65 | * if you are REALLY sure that your board is correct one. |
1da177e4 LT |
66 | */ |
67 | ||
68 | #define RISCOM_BRAIN_DAMAGED_CTS | |
69 | ||
9492e135 | 70 | /* |
1da177e4 LT |
71 | * The following defines are mostly for testing purposes. But if you need |
72 | * some nice reporting in your syslog, you can define them also. | |
73 | */ | |
74 | #undef RC_REPORT_FIFO | |
75 | #undef RC_REPORT_OVERRUN | |
76 | ||
77 | ||
78 | #define RISCOM_LEGAL_FLAGS \ | |
79 | (ASYNC_HUP_NOTIFY | ASYNC_SAK | ASYNC_SPLIT_TERMIOS | \ | |
80 | ASYNC_SPD_HI | ASYNC_SPEED_VHI | ASYNC_SESSION_LOCKOUT | \ | |
81 | ASYNC_PGRP_LOCKOUT | ASYNC_CALLOUT_NOHUP) | |
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 | ||
9492e135 | 117 | static int rc_paranoia_check(struct riscom_port const *port, |
1da177e4 LT |
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 | /* | |
9492e135 | 139 | * |
1da177e4 | 140 | * Service functions for RISCom/8 driver. |
9492e135 | 141 | * |
1da177e4 LT |
142 | */ |
143 | ||
144 | /* Get board number from pointer */ | |
9492e135 | 145 | static inline int board_No(struct riscom_board const *bp) |
1da177e4 LT |
146 | { |
147 | return bp - rc_board; | |
148 | } | |
149 | ||
150 | /* Get port number from pointer */ | |
9492e135 | 151 | static inline int port_No(struct riscom_port const *port) |
1da177e4 | 152 | { |
9492e135 | 153 | return RC_PORT(port - rc_port); |
1da177e4 LT |
154 | } |
155 | ||
156 | /* Get pointer to board from pointer to port */ | |
9492e135 | 157 | static inline struct riscom_board *port_Board(struct riscom_port const *port) |
1da177e4 LT |
158 | { |
159 | return &rc_board[RC_BOARD(port - rc_port)]; | |
160 | } | |
161 | ||
162 | /* Input Byte from CL CD180 register */ | |
9492e135 AC |
163 | static inline unsigned char rc_in(struct riscom_board const *bp, |
164 | unsigned short reg) | |
1da177e4 LT |
165 | { |
166 | return inb(bp->base + RC_TO_ISA(reg)); | |
167 | } | |
168 | ||
169 | /* Output Byte to CL CD180 register */ | |
9492e135 | 170 | static inline void rc_out(struct riscom_board const *bp, unsigned short reg, |
1da177e4 LT |
171 | unsigned char val) |
172 | { | |
173 | outb(val, bp->base + RC_TO_ISA(reg)); | |
174 | } | |
175 | ||
176 | /* Wait for Channel Command Register ready */ | |
9492e135 | 177 | static void rc_wait_CCR(struct riscom_board const *bp) |
1da177e4 LT |
178 | { |
179 | unsigned long delay; | |
180 | ||
181 | /* FIXME: need something more descriptive then 100000 :) */ | |
9492e135 | 182 | for (delay = 100000; delay; delay--) |
1da177e4 LT |
183 | if (!rc_in(bp, CD180_CCR)) |
184 | return; | |
9492e135 | 185 | |
1da177e4 LT |
186 | printk(KERN_INFO "rc%d: Timeout waiting for CCR.\n", board_No(bp)); |
187 | } | |
188 | ||
189 | /* | |
190 | * RISCom/8 probe functions. | |
191 | */ | |
192 | ||
9492e135 | 193 | static int rc_request_io_range(struct riscom_board * const bp) |
1da177e4 LT |
194 | { |
195 | int i; | |
9492e135 AC |
196 | |
197 | for (i = 0; i < RC_NIOPORT; i++) | |
1da177e4 LT |
198 | if (!request_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1, |
199 | "RISCom/8")) { | |
200 | goto out_release; | |
201 | } | |
202 | return 0; | |
203 | out_release: | |
204 | printk(KERN_INFO "rc%d: Skipping probe at 0x%03x. IO address in use.\n", | |
205 | board_No(bp), bp->base); | |
9492e135 | 206 | while (--i >= 0) |
1da177e4 LT |
207 | release_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1); |
208 | return 1; | |
209 | } | |
210 | ||
9492e135 | 211 | static void rc_release_io_range(struct riscom_board * const bp) |
1da177e4 LT |
212 | { |
213 | int i; | |
9492e135 AC |
214 | |
215 | for (i = 0; i < RC_NIOPORT; i++) | |
1da177e4 LT |
216 | release_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1); |
217 | } | |
9492e135 | 218 | |
1da177e4 | 219 | /* Reset and setup CD180 chip */ |
9492e135 | 220 | static void __init rc_init_CD180(struct riscom_board const *bp) |
1da177e4 LT |
221 | { |
222 | unsigned long flags; | |
9492e135 | 223 | |
d9afa435 JG |
224 | spin_lock_irqsave(&riscom_lock, flags); |
225 | ||
9492e135 AC |
226 | rc_out(bp, RC_CTOUT, 0); /* Clear timeout */ |
227 | rc_wait_CCR(bp); /* Wait for CCR ready */ | |
228 | rc_out(bp, CD180_CCR, CCR_HARDRESET); /* Reset CD180 chip */ | |
d9afa435 | 229 | spin_unlock_irqrestore(&riscom_lock, flags); |
9492e135 | 230 | msleep(50); /* Delay 0.05 sec */ |
d9afa435 | 231 | spin_lock_irqsave(&riscom_lock, flags); |
9492e135 AC |
232 | rc_out(bp, CD180_GIVR, RC_ID); /* Set ID for this chip */ |
233 | rc_out(bp, CD180_GICR, 0); /* Clear all bits */ | |
234 | rc_out(bp, CD180_PILR1, RC_ACK_MINT); /* Prio for modem intr */ | |
235 | rc_out(bp, CD180_PILR2, RC_ACK_TINT); /* Prio for tx intr */ | |
236 | rc_out(bp, CD180_PILR3, RC_ACK_RINT); /* Prio for rx intr */ | |
237 | ||
1da177e4 LT |
238 | /* Setting up prescaler. We need 4 ticks per 1 ms */ |
239 | rc_out(bp, CD180_PPRH, (RC_OSCFREQ/(1000000/RISCOM_TPS)) >> 8); | |
240 | rc_out(bp, CD180_PPRL, (RC_OSCFREQ/(1000000/RISCOM_TPS)) & 0xff); | |
9492e135 | 241 | |
d9afa435 | 242 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
243 | } |
244 | ||
245 | /* Main probing routine, also sets irq. */ | |
246 | static int __init rc_probe(struct riscom_board *bp) | |
247 | { | |
248 | unsigned char val1, val2; | |
249 | int irqs = 0; | |
250 | int retries; | |
9492e135 | 251 | |
1da177e4 LT |
252 | bp->irq = 0; |
253 | ||
254 | if (rc_request_io_range(bp)) | |
255 | return 1; | |
9492e135 | 256 | |
1da177e4 LT |
257 | /* Are the I/O ports here ? */ |
258 | rc_out(bp, CD180_PPRL, 0x5a); | |
259 | outb(0xff, 0x80); | |
260 | val1 = rc_in(bp, CD180_PPRL); | |
261 | rc_out(bp, CD180_PPRL, 0xa5); | |
262 | outb(0x00, 0x80); | |
263 | val2 = rc_in(bp, CD180_PPRL); | |
9492e135 | 264 | |
1da177e4 LT |
265 | if ((val1 != 0x5a) || (val2 != 0xa5)) { |
266 | printk(KERN_ERR "rc%d: RISCom/8 Board at 0x%03x not found.\n", | |
267 | board_No(bp), bp->base); | |
268 | goto out_release; | |
269 | } | |
9492e135 | 270 | |
1da177e4 | 271 | /* It's time to find IRQ for this board */ |
9492e135 | 272 | for (retries = 0; retries < 5 && irqs <= 0; retries++) { |
1da177e4 | 273 | irqs = probe_irq_on(); |
9492e135 AC |
274 | rc_init_CD180(bp); /* Reset CD180 chip */ |
275 | rc_out(bp, CD180_CAR, 2); /* Select port 2 */ | |
1da177e4 | 276 | rc_wait_CCR(bp); |
9492e135 AC |
277 | rc_out(bp, CD180_CCR, CCR_TXEN); /* Enable transmitter */ |
278 | rc_out(bp, CD180_IER, IER_TXRDY);/* Enable tx empty intr */ | |
c4ebd927 | 279 | msleep(50); |
1da177e4 | 280 | irqs = probe_irq_off(irqs); |
9492e135 AC |
281 | val1 = rc_in(bp, RC_BSR); /* Get Board Status reg */ |
282 | val2 = rc_in(bp, RC_ACK_TINT); /* ACK interrupt */ | |
283 | rc_init_CD180(bp); /* Reset CD180 again */ | |
284 | ||
1da177e4 LT |
285 | if ((val1 & RC_BSR_TINT) || (val2 != (RC_ID | GIVR_IT_TX))) { |
286 | printk(KERN_ERR "rc%d: RISCom/8 Board at 0x%03x not " | |
287 | "found.\n", board_No(bp), bp->base); | |
288 | goto out_release; | |
289 | } | |
290 | } | |
9492e135 | 291 | |
1da177e4 LT |
292 | if (irqs <= 0) { |
293 | printk(KERN_ERR "rc%d: Can't find IRQ for RISCom/8 board " | |
294 | "at 0x%03x.\n", board_No(bp), bp->base); | |
295 | goto out_release; | |
296 | } | |
297 | bp->irq = irqs; | |
298 | bp->flags |= RC_BOARD_PRESENT; | |
9492e135 | 299 | |
1da177e4 LT |
300 | printk(KERN_INFO "rc%d: RISCom/8 Rev. %c board detected at " |
301 | "0x%03x, IRQ %d.\n", | |
302 | board_No(bp), | |
303 | (rc_in(bp, CD180_GFRCR) & 0x0f) + 'A', /* Board revision */ | |
304 | bp->base, bp->irq); | |
9492e135 | 305 | |
1da177e4 LT |
306 | return 0; |
307 | out_release: | |
308 | rc_release_io_range(bp); | |
309 | return 1; | |
310 | } | |
311 | ||
9492e135 AC |
312 | /* |
313 | * | |
1da177e4 | 314 | * Interrupt processing routines. |
9492e135 | 315 | * |
1da177e4 LT |
316 | */ |
317 | ||
9492e135 AC |
318 | static struct riscom_port *rc_get_port(struct riscom_board const *bp, |
319 | unsigned char const *what) | |
1da177e4 LT |
320 | { |
321 | unsigned char channel; | |
9492e135 AC |
322 | struct riscom_port *port; |
323 | ||
1da177e4 LT |
324 | channel = rc_in(bp, CD180_GICR) >> GICR_CHAN_OFF; |
325 | if (channel < CD180_NCH) { | |
326 | port = &rc_port[board_No(bp) * RC_NPORT + channel]; | |
85f8f810 | 327 | if (port->port.flags & ASYNC_INITIALIZED) |
1da177e4 | 328 | return port; |
1da177e4 | 329 | } |
9492e135 | 330 | printk(KERN_ERR "rc%d: %s interrupt from invalid port %d\n", |
1da177e4 LT |
331 | board_No(bp), what, channel); |
332 | return NULL; | |
333 | } | |
334 | ||
9492e135 | 335 | static void rc_receive_exc(struct riscom_board const *bp) |
1da177e4 LT |
336 | { |
337 | struct riscom_port *port; | |
338 | struct tty_struct *tty; | |
339 | unsigned char status; | |
33f0f88f | 340 | unsigned char ch, flag; |
9492e135 AC |
341 | |
342 | port = rc_get_port(bp, "Receive"); | |
343 | if (port == NULL) | |
1da177e4 LT |
344 | return; |
345 | ||
6ff1ab28 | 346 | tty = tty_port_tty_get(&port->port); |
9492e135 AC |
347 | |
348 | #ifdef RC_REPORT_OVERRUN | |
1da177e4 | 349 | status = rc_in(bp, CD180_RCSR); |
33f0f88f | 350 | if (status & RCSR_OE) |
1da177e4 | 351 | port->overrun++; |
1da177e4 | 352 | status &= port->mark_mask; |
9492e135 | 353 | #else |
1da177e4 | 354 | status = rc_in(bp, CD180_RCSR) & port->mark_mask; |
9492e135 | 355 | #endif |
1da177e4 | 356 | ch = rc_in(bp, CD180_RDR); |
9492e135 | 357 | if (!status) |
6ff1ab28 | 358 | goto out; |
1da177e4 LT |
359 | if (status & RCSR_TOUT) { |
360 | printk(KERN_WARNING "rc%d: port %d: Receiver timeout. " | |
9492e135 | 361 | "Hardware problems ?\n", |
1da177e4 | 362 | board_No(bp), port_No(port)); |
6ff1ab28 | 363 | goto out; |
9492e135 | 364 | |
1da177e4 LT |
365 | } else if (status & RCSR_BREAK) { |
366 | printk(KERN_INFO "rc%d: port %d: Handling break...\n", | |
367 | board_No(bp), port_No(port)); | |
33f0f88f | 368 | flag = TTY_BREAK; |
6ff1ab28 | 369 | if (tty && (port->port.flags & ASYNC_SAK)) |
1da177e4 | 370 | do_SAK(tty); |
9492e135 AC |
371 | |
372 | } else if (status & RCSR_PE) | |
33f0f88f | 373 | flag = TTY_PARITY; |
9492e135 AC |
374 | |
375 | else if (status & RCSR_FE) | |
33f0f88f | 376 | flag = TTY_FRAME; |
9492e135 AC |
377 | |
378 | else if (status & RCSR_OE) | |
33f0f88f | 379 | flag = TTY_OVERRUN; |
1da177e4 | 380 | else |
33f0f88f | 381 | flag = TTY_NORMAL; |
9492e135 | 382 | |
6ff1ab28 AC |
383 | if (tty) { |
384 | tty_insert_flip_char(tty, ch, flag); | |
385 | tty_flip_buffer_push(tty); | |
386 | } | |
387 | out: | |
388 | tty_kref_put(tty); | |
1da177e4 LT |
389 | } |
390 | ||
9492e135 | 391 | static void rc_receive(struct riscom_board const *bp) |
1da177e4 LT |
392 | { |
393 | struct riscom_port *port; | |
394 | struct tty_struct *tty; | |
395 | unsigned char count; | |
9492e135 AC |
396 | |
397 | port = rc_get_port(bp, "Receive"); | |
398 | if (port == NULL) | |
1da177e4 | 399 | return; |
9492e135 | 400 | |
6ff1ab28 | 401 | tty = tty_port_tty_get(&port->port); |
9492e135 | 402 | |
1da177e4 | 403 | count = rc_in(bp, CD180_RDCR); |
9492e135 | 404 | |
1da177e4 LT |
405 | #ifdef RC_REPORT_FIFO |
406 | port->hits[count > 8 ? 9 : count]++; | |
9492e135 AC |
407 | #endif |
408 | ||
1da177e4 | 409 | while (count--) { |
6ff1ab28 AC |
410 | u8 ch = rc_in(bp, CD180_RDR); |
411 | if (tty) | |
412 | tty_insert_flip_char(tty, ch, TTY_NORMAL); | |
413 | } | |
414 | if (tty) { | |
415 | tty_flip_buffer_push(tty); | |
416 | tty_kref_put(tty); | |
1da177e4 | 417 | } |
1da177e4 LT |
418 | } |
419 | ||
9492e135 | 420 | static void rc_transmit(struct riscom_board const *bp) |
1da177e4 LT |
421 | { |
422 | struct riscom_port *port; | |
423 | struct tty_struct *tty; | |
424 | unsigned char count; | |
9492e135 AC |
425 | |
426 | port = rc_get_port(bp, "Transmit"); | |
427 | if (port == NULL) | |
1da177e4 | 428 | return; |
9492e135 | 429 | |
6ff1ab28 | 430 | tty = tty_port_tty_get(&port->port); |
9492e135 AC |
431 | |
432 | if (port->IER & IER_TXEMPTY) { | |
1da177e4 LT |
433 | /* FIFO drained */ |
434 | rc_out(bp, CD180_CAR, port_No(port)); | |
435 | port->IER &= ~IER_TXEMPTY; | |
436 | rc_out(bp, CD180_IER, port->IER); | |
6ff1ab28 | 437 | goto out; |
1da177e4 | 438 | } |
9492e135 | 439 | |
1da177e4 | 440 | if ((port->xmit_cnt <= 0 && !port->break_length) |
6ff1ab28 | 441 | || (tty && (tty->stopped || tty->hw_stopped))) { |
1da177e4 LT |
442 | rc_out(bp, CD180_CAR, port_No(port)); |
443 | port->IER &= ~IER_TXRDY; | |
444 | rc_out(bp, CD180_IER, port->IER); | |
6ff1ab28 | 445 | goto out; |
1da177e4 | 446 | } |
9492e135 | 447 | |
1da177e4 LT |
448 | if (port->break_length) { |
449 | if (port->break_length > 0) { | |
450 | if (port->COR2 & COR2_ETC) { | |
451 | rc_out(bp, CD180_TDR, CD180_C_ESC); | |
452 | rc_out(bp, CD180_TDR, CD180_C_SBRK); | |
453 | port->COR2 &= ~COR2_ETC; | |
454 | } | |
455 | count = min_t(int, port->break_length, 0xff); | |
456 | rc_out(bp, CD180_TDR, CD180_C_ESC); | |
457 | rc_out(bp, CD180_TDR, CD180_C_DELAY); | |
458 | rc_out(bp, CD180_TDR, count); | |
9492e135 AC |
459 | port->break_length -= count; |
460 | if (port->break_length == 0) | |
1da177e4 LT |
461 | port->break_length--; |
462 | } else { | |
463 | rc_out(bp, CD180_TDR, CD180_C_ESC); | |
464 | rc_out(bp, CD180_TDR, CD180_C_EBRK); | |
465 | rc_out(bp, CD180_COR2, port->COR2); | |
466 | rc_wait_CCR(bp); | |
467 | rc_out(bp, CD180_CCR, CCR_CORCHG2); | |
468 | port->break_length = 0; | |
469 | } | |
7e63d0c4 | 470 | goto out; |
1da177e4 | 471 | } |
9492e135 | 472 | |
1da177e4 LT |
473 | count = CD180_NFIFO; |
474 | do { | |
85f8f810 | 475 | rc_out(bp, CD180_TDR, port->port.xmit_buf[port->xmit_tail++]); |
1da177e4 LT |
476 | port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1); |
477 | if (--port->xmit_cnt <= 0) | |
478 | break; | |
479 | } while (--count > 0); | |
9492e135 | 480 | |
1da177e4 LT |
481 | if (port->xmit_cnt <= 0) { |
482 | rc_out(bp, CD180_CAR, port_No(port)); | |
483 | port->IER &= ~IER_TXRDY; | |
484 | rc_out(bp, CD180_IER, port->IER); | |
485 | } | |
6ff1ab28 | 486 | if (tty && port->xmit_cnt <= port->wakeup_chars) |
b98e70de | 487 | tty_wakeup(tty); |
6ff1ab28 AC |
488 | out: |
489 | tty_kref_put(tty); | |
1da177e4 LT |
490 | } |
491 | ||
9492e135 | 492 | static void rc_check_modem(struct riscom_board const *bp) |
1da177e4 LT |
493 | { |
494 | struct riscom_port *port; | |
495 | struct tty_struct *tty; | |
496 | unsigned char mcr; | |
9492e135 AC |
497 | |
498 | port = rc_get_port(bp, "Modem"); | |
499 | if (port == NULL) | |
1da177e4 | 500 | return; |
9492e135 | 501 | |
6ff1ab28 | 502 | tty = tty_port_tty_get(&port->port); |
9492e135 | 503 | |
1da177e4 | 504 | mcr = rc_in(bp, CD180_MCR); |
9492e135 AC |
505 | if (mcr & MCR_CDCHG) { |
506 | if (rc_in(bp, CD180_MSVR) & MSVR_CD) | |
85f8f810 | 507 | wake_up_interruptible(&port->port.open_wait); |
6ff1ab28 | 508 | else if (tty) |
b98e70de | 509 | tty_hangup(tty); |
1da177e4 | 510 | } |
9492e135 | 511 | |
1da177e4 LT |
512 | #ifdef RISCOM_BRAIN_DAMAGED_CTS |
513 | if (mcr & MCR_CTSCHG) { | |
514 | if (rc_in(bp, CD180_MSVR) & MSVR_CTS) { | |
1da177e4 | 515 | port->IER |= IER_TXRDY; |
6ff1ab28 AC |
516 | if (tty) { |
517 | tty->hw_stopped = 0; | |
518 | if (port->xmit_cnt <= port->wakeup_chars) | |
519 | tty_wakeup(tty); | |
520 | } | |
1da177e4 | 521 | } else { |
6ff1ab28 AC |
522 | if (tty) |
523 | tty->hw_stopped = 1; | |
1da177e4 LT |
524 | port->IER &= ~IER_TXRDY; |
525 | } | |
526 | rc_out(bp, CD180_IER, port->IER); | |
527 | } | |
528 | if (mcr & MCR_DSRCHG) { | |
529 | if (rc_in(bp, CD180_MSVR) & MSVR_DSR) { | |
1da177e4 | 530 | port->IER |= IER_TXRDY; |
6ff1ab28 AC |
531 | if (tty) { |
532 | tty->hw_stopped = 0; | |
533 | if (port->xmit_cnt <= port->wakeup_chars) | |
534 | tty_wakeup(tty); | |
535 | } | |
1da177e4 | 536 | } else { |
6ff1ab28 AC |
537 | if (tty) |
538 | tty->hw_stopped = 1; | |
1da177e4 LT |
539 | port->IER &= ~IER_TXRDY; |
540 | } | |
541 | rc_out(bp, CD180_IER, port->IER); | |
542 | } | |
543 | #endif /* RISCOM_BRAIN_DAMAGED_CTS */ | |
9492e135 | 544 | |
1da177e4 LT |
545 | /* Clear change bits */ |
546 | rc_out(bp, CD180_MCR, 0); | |
6ff1ab28 | 547 | tty_kref_put(tty); |
1da177e4 LT |
548 | } |
549 | ||
550 | /* The main interrupt processing routine */ | |
9492e135 | 551 | static irqreturn_t rc_interrupt(int dummy, void *dev_id) |
1da177e4 LT |
552 | { |
553 | unsigned char status; | |
554 | unsigned char ack; | |
f07ef395 | 555 | struct riscom_board *bp = dev_id; |
1da177e4 LT |
556 | unsigned long loop = 0; |
557 | int handled = 0; | |
558 | ||
c7bec5ab | 559 | if (!(bp->flags & RC_BOARD_ACTIVE)) |
1da177e4 | 560 | return IRQ_NONE; |
c7bec5ab | 561 | |
1da177e4 LT |
562 | while ((++loop < 16) && ((status = ~(rc_in(bp, RC_BSR))) & |
563 | (RC_BSR_TOUT | RC_BSR_TINT | | |
564 | RC_BSR_MINT | RC_BSR_RINT))) { | |
565 | handled = 1; | |
9492e135 | 566 | if (status & RC_BSR_TOUT) |
1da177e4 LT |
567 | printk(KERN_WARNING "rc%d: Got timeout. Hardware " |
568 | "error?\n", board_No(bp)); | |
1da177e4 LT |
569 | else if (status & RC_BSR_RINT) { |
570 | ack = rc_in(bp, RC_ACK_RINT); | |
1da177e4 LT |
571 | if (ack == (RC_ID | GIVR_IT_RCV)) |
572 | rc_receive(bp); | |
573 | else if (ack == (RC_ID | GIVR_IT_REXC)) | |
574 | rc_receive_exc(bp); | |
575 | else | |
576 | printk(KERN_WARNING "rc%d: Bad receive ack " | |
577 | "0x%02x.\n", | |
578 | board_No(bp), ack); | |
1da177e4 LT |
579 | } else if (status & RC_BSR_TINT) { |
580 | ack = rc_in(bp, RC_ACK_TINT); | |
1da177e4 LT |
581 | if (ack == (RC_ID | GIVR_IT_TX)) |
582 | rc_transmit(bp); | |
583 | else | |
584 | printk(KERN_WARNING "rc%d: Bad transmit ack " | |
585 | "0x%02x.\n", | |
586 | board_No(bp), ack); | |
1da177e4 LT |
587 | } else /* if (status & RC_BSR_MINT) */ { |
588 | ack = rc_in(bp, RC_ACK_MINT); | |
9492e135 | 589 | if (ack == (RC_ID | GIVR_IT_MODEM)) |
1da177e4 LT |
590 | rc_check_modem(bp); |
591 | else | |
592 | printk(KERN_WARNING "rc%d: Bad modem ack " | |
593 | "0x%02x.\n", | |
594 | board_No(bp), ack); | |
9492e135 | 595 | } |
1da177e4 LT |
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 */ | |
9492e135 | 607 | static int rc_setup_board(struct riscom_board *bp) |
1da177e4 LT |
608 | { |
609 | int error; | |
610 | ||
9492e135 | 611 | if (bp->flags & RC_BOARD_ACTIVE) |
1da177e4 | 612 | return 0; |
9492e135 | 613 | |
0f2ed4c6 | 614 | error = request_irq(bp->irq, rc_interrupt, IRQF_DISABLED, |
f07ef395 | 615 | "RISCom/8", bp); |
9492e135 | 616 | if (error) |
1da177e4 | 617 | return error; |
9492e135 | 618 | |
1da177e4 LT |
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 */ | |
9492e135 | 622 | |
1da177e4 | 623 | bp->flags |= RC_BOARD_ACTIVE; |
9492e135 | 624 | |
1da177e4 LT |
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; | |
9492e135 | 633 | |
1da177e4 | 634 | bp->flags &= ~RC_BOARD_ACTIVE; |
9492e135 | 635 | |
1da177e4 | 636 | free_irq(bp->irq, NULL); |
9492e135 | 637 | |
1da177e4 LT |
638 | bp->DTR = ~0; |
639 | rc_out(bp, RC_DTR, bp->DTR); /* Drop DTR on all ports */ | |
9492e135 | 640 | |
1da177e4 LT |
641 | } |
642 | ||
643 | /* | |
9492e135 | 644 | * Setting up port characteristics. |
1da177e4 LT |
645 | * Must be called with disabled interrupts |
646 | */ | |
6ff1ab28 AC |
647 | static void rc_change_speed(struct tty_struct *tty, struct riscom_board *bp, |
648 | struct riscom_port *port) | |
1da177e4 | 649 | { |
1da177e4 LT |
650 | unsigned long baud; |
651 | long tmp; | |
652 | unsigned char cor1 = 0, cor3 = 0; | |
653 | unsigned char mcor1 = 0, mcor2 = 0; | |
9492e135 | 654 | |
1da177e4 LT |
655 | port->IER = 0; |
656 | port->COR2 = 0; | |
657 | port->MSVR = MSVR_RTS; | |
9492e135 | 658 | |
c7bce309 | 659 | baud = tty_get_baud_rate(tty); |
9492e135 | 660 | |
1da177e4 LT |
661 | /* Select port on the board */ |
662 | rc_out(bp, CD180_CAR, port_No(port)); | |
9492e135 | 663 | |
c7bce309 | 664 | if (!baud) { |
1da177e4 LT |
665 | /* Drop DTR & exit */ |
666 | bp->DTR |= (1u << port_No(port)); | |
667 | rc_out(bp, RC_DTR, bp->DTR); | |
668 | return; | |
669 | } else { | |
670 | /* Set DTR on */ | |
671 | bp->DTR &= ~(1u << port_No(port)); | |
672 | rc_out(bp, RC_DTR, bp->DTR); | |
673 | } | |
9492e135 | 674 | |
1da177e4 | 675 | /* |
9492e135 | 676 | * Now we must calculate some speed depended things |
1da177e4 | 677 | */ |
9492e135 | 678 | |
1da177e4 | 679 | /* Set baud rate for port */ |
c7bce309 | 680 | tmp = (((RC_OSCFREQ + baud/2) / baud + |
1da177e4 LT |
681 | CD180_TPC/2) / CD180_TPC); |
682 | ||
9492e135 AC |
683 | rc_out(bp, CD180_RBPRH, (tmp >> 8) & 0xff); |
684 | rc_out(bp, CD180_TBPRH, (tmp >> 8) & 0xff); | |
685 | rc_out(bp, CD180_RBPRL, tmp & 0xff); | |
1da177e4 | 686 | rc_out(bp, CD180_TBPRL, tmp & 0xff); |
9492e135 | 687 | |
c7bce309 | 688 | baud = (baud + 5) / 10; /* Estimated CPS */ |
9492e135 | 689 | |
1da177e4 | 690 | /* Two timer ticks seems enough to wakeup something like SLIP driver */ |
9492e135 | 691 | tmp = ((baud + HZ/2) / HZ) * 2 - CD180_NFIFO; |
1da177e4 LT |
692 | port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ? |
693 | SERIAL_XMIT_SIZE - 1 : tmp); | |
9492e135 | 694 | |
1da177e4 LT |
695 | /* Receiver timeout will be transmission time for 1.5 chars */ |
696 | tmp = (RISCOM_TPS + RISCOM_TPS/2 + baud/2) / baud; | |
697 | tmp = (tmp > 0xff) ? 0xff : tmp; | |
698 | rc_out(bp, CD180_RTPR, tmp); | |
9492e135 AC |
699 | |
700 | switch (C_CSIZE(tty)) { | |
701 | case CS5: | |
1da177e4 LT |
702 | cor1 |= COR1_5BITS; |
703 | break; | |
9492e135 | 704 | case CS6: |
1da177e4 LT |
705 | cor1 |= COR1_6BITS; |
706 | break; | |
9492e135 | 707 | case CS7: |
1da177e4 LT |
708 | cor1 |= COR1_7BITS; |
709 | break; | |
9492e135 | 710 | case CS8: |
1da177e4 LT |
711 | cor1 |= COR1_8BITS; |
712 | break; | |
713 | } | |
9492e135 | 714 | if (C_CSTOPB(tty)) |
1da177e4 | 715 | cor1 |= COR1_2SB; |
9492e135 | 716 | |
1da177e4 | 717 | cor1 |= COR1_IGNORE; |
9492e135 | 718 | if (C_PARENB(tty)) { |
1da177e4 | 719 | cor1 |= COR1_NORMPAR; |
9492e135 | 720 | if (C_PARODD(tty)) |
1da177e4 | 721 | cor1 |= COR1_ODDP; |
9492e135 | 722 | if (I_INPCK(tty)) |
1da177e4 LT |
723 | cor1 &= ~COR1_IGNORE; |
724 | } | |
725 | /* Set marking of some errors */ | |
726 | port->mark_mask = RCSR_OE | RCSR_TOUT; | |
9492e135 | 727 | if (I_INPCK(tty)) |
1da177e4 | 728 | port->mark_mask |= RCSR_FE | RCSR_PE; |
9492e135 | 729 | if (I_BRKINT(tty) || I_PARMRK(tty)) |
1da177e4 | 730 | port->mark_mask |= RCSR_BREAK; |
9492e135 | 731 | if (I_IGNPAR(tty)) |
1da177e4 | 732 | port->mark_mask &= ~(RCSR_FE | RCSR_PE); |
9492e135 | 733 | if (I_IGNBRK(tty)) { |
1da177e4 | 734 | port->mark_mask &= ~RCSR_BREAK; |
9492e135 | 735 | if (I_IGNPAR(tty)) |
1da177e4 LT |
736 | /* Real raw mode. Ignore all */ |
737 | port->mark_mask &= ~RCSR_OE; | |
738 | } | |
739 | /* Enable Hardware Flow Control */ | |
740 | if (C_CRTSCTS(tty)) { | |
741 | #ifdef RISCOM_BRAIN_DAMAGED_CTS | |
742 | port->IER |= IER_DSR | IER_CTS; | |
743 | mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD; | |
744 | mcor2 |= MCOR2_DSROD | MCOR2_CTSOD; | |
9492e135 AC |
745 | tty->hw_stopped = !(rc_in(bp, CD180_MSVR) & |
746 | (MSVR_CTS|MSVR_DSR)); | |
1da177e4 LT |
747 | #else |
748 | port->COR2 |= COR2_CTSAE; | |
749 | #endif | |
750 | } | |
751 | /* Enable Software Flow Control. FIXME: I'm not sure about this */ | |
752 | /* Some people reported that it works, but I still doubt */ | |
753 | if (I_IXON(tty)) { | |
754 | port->COR2 |= COR2_TXIBE; | |
755 | cor3 |= (COR3_FCT | COR3_SCDE); | |
756 | if (I_IXANY(tty)) | |
757 | port->COR2 |= COR2_IXM; | |
758 | rc_out(bp, CD180_SCHR1, START_CHAR(tty)); | |
759 | rc_out(bp, CD180_SCHR2, STOP_CHAR(tty)); | |
760 | rc_out(bp, CD180_SCHR3, START_CHAR(tty)); | |
761 | rc_out(bp, CD180_SCHR4, STOP_CHAR(tty)); | |
762 | } | |
763 | if (!C_CLOCAL(tty)) { | |
764 | /* Enable CD check */ | |
765 | port->IER |= IER_CD; | |
766 | mcor1 |= MCOR1_CDZD; | |
767 | mcor2 |= MCOR2_CDOD; | |
768 | } | |
9492e135 AC |
769 | |
770 | if (C_CREAD(tty)) | |
1da177e4 LT |
771 | /* Enable receiver */ |
772 | port->IER |= IER_RXD; | |
9492e135 | 773 | |
1da177e4 | 774 | /* Set input FIFO size (1-8 bytes) */ |
9492e135 | 775 | cor3 |= RISCOM_RXFIFO; |
1da177e4 LT |
776 | /* Setting up CD180 channel registers */ |
777 | rc_out(bp, CD180_COR1, cor1); | |
778 | rc_out(bp, CD180_COR2, port->COR2); | |
779 | rc_out(bp, CD180_COR3, cor3); | |
780 | /* Make CD180 know about registers change */ | |
781 | rc_wait_CCR(bp); | |
782 | rc_out(bp, CD180_CCR, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3); | |
783 | /* Setting up modem option registers */ | |
784 | rc_out(bp, CD180_MCOR1, mcor1); | |
785 | rc_out(bp, CD180_MCOR2, mcor2); | |
786 | /* Enable CD180 transmitter & receiver */ | |
787 | rc_wait_CCR(bp); | |
788 | rc_out(bp, CD180_CCR, CCR_TXEN | CCR_RXEN); | |
789 | /* Enable interrupts */ | |
790 | rc_out(bp, CD180_IER, port->IER); | |
791 | /* And finally set RTS on */ | |
792 | rc_out(bp, CD180_MSVR, port->MSVR); | |
793 | } | |
794 | ||
795 | /* Must be called with interrupts enabled */ | |
6ff1ab28 AC |
796 | static int rc_setup_port(struct tty_struct *tty, struct riscom_board *bp, |
797 | struct riscom_port *port) | |
1da177e4 LT |
798 | { |
799 | unsigned long flags; | |
9492e135 | 800 | |
85f8f810 | 801 | if (port->port.flags & ASYNC_INITIALIZED) |
1da177e4 | 802 | return 0; |
9492e135 | 803 | |
85f8f810 AC |
804 | if (tty_port_alloc_xmit_buf(&port->port) < 0) |
805 | return -ENOMEM; | |
806 | ||
d9afa435 JG |
807 | spin_lock_irqsave(&riscom_lock, flags); |
808 | ||
6ff1ab28 | 809 | clear_bit(TTY_IO_ERROR, &tty->flags); |
85f8f810 | 810 | if (port->port.count == 1) |
1da177e4 | 811 | bp->count++; |
1da177e4 | 812 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; |
6ff1ab28 | 813 | rc_change_speed(tty, bp, port); |
85f8f810 | 814 | port->port.flags |= ASYNC_INITIALIZED; |
9492e135 | 815 | |
d9afa435 | 816 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
817 | return 0; |
818 | } | |
819 | ||
820 | /* Must be called with interrupts disabled */ | |
d99101fd AC |
821 | static void rc_shutdown_port(struct tty_struct *tty, |
822 | struct riscom_board *bp, struct riscom_port *port) | |
1da177e4 | 823 | { |
85f8f810 | 824 | if (!(port->port.flags & ASYNC_INITIALIZED)) |
1da177e4 | 825 | return; |
9492e135 | 826 | |
1da177e4 LT |
827 | #ifdef RC_REPORT_OVERRUN |
828 | printk(KERN_INFO "rc%d: port %d: Total %ld overruns were detected.\n", | |
829 | board_No(bp), port_No(port), port->overrun); | |
9492e135 | 830 | #endif |
1da177e4 LT |
831 | #ifdef RC_REPORT_FIFO |
832 | { | |
833 | int i; | |
9492e135 | 834 | |
1da177e4 LT |
835 | printk(KERN_INFO "rc%d: port %d: FIFO hits [ ", |
836 | board_No(bp), port_No(port)); | |
9492e135 | 837 | for (i = 0; i < 10; i++) |
1da177e4 | 838 | printk("%ld ", port->hits[i]); |
1da177e4 LT |
839 | printk("].\n"); |
840 | } | |
9492e135 | 841 | #endif |
85f8f810 | 842 | tty_port_free_xmit_buf(&port->port); |
d99101fd | 843 | if (C_HUPCL(tty)) { |
1da177e4 LT |
844 | /* Drop DTR */ |
845 | bp->DTR |= (1u << port_No(port)); | |
846 | rc_out(bp, RC_DTR, bp->DTR); | |
847 | } | |
9492e135 AC |
848 | |
849 | /* Select port */ | |
1da177e4 LT |
850 | rc_out(bp, CD180_CAR, port_No(port)); |
851 | /* Reset port */ | |
852 | rc_wait_CCR(bp); | |
853 | rc_out(bp, CD180_CCR, CCR_SOFTRESET); | |
854 | /* Disable all interrupts from this port */ | |
855 | port->IER = 0; | |
856 | rc_out(bp, CD180_IER, port->IER); | |
9492e135 | 857 | |
d99101fd | 858 | set_bit(TTY_IO_ERROR, &tty->flags); |
85f8f810 | 859 | port->port.flags &= ~ASYNC_INITIALIZED; |
9492e135 | 860 | |
1da177e4 LT |
861 | if (--bp->count < 0) { |
862 | printk(KERN_INFO "rc%d: rc_shutdown_port: " | |
863 | "bad board count: %d\n", | |
864 | board_No(bp), bp->count); | |
865 | bp->count = 0; | |
866 | } | |
1da177e4 LT |
867 | /* |
868 | * If this is the last opened port on the board | |
869 | * shutdown whole board | |
870 | */ | |
9492e135 | 871 | if (!bp->count) |
1da177e4 LT |
872 | rc_shutdown_board(bp); |
873 | } | |
874 | ||
31f35939 AC |
875 | static int carrier_raised(struct tty_port *port) |
876 | { | |
877 | struct riscom_port *p = container_of(port, struct riscom_port, port); | |
878 | struct riscom_board *bp = port_Board(p); | |
879 | unsigned long flags; | |
880 | int CD; | |
881 | ||
882 | spin_lock_irqsave(&riscom_lock, flags); | |
883 | rc_out(bp, CD180_CAR, port_No(p)); | |
884 | CD = rc_in(bp, CD180_MSVR) & MSVR_CD; | |
885 | rc_out(bp, CD180_MSVR, MSVR_RTS); | |
886 | bp->DTR &= ~(1u << port_No(p)); | |
887 | rc_out(bp, RC_DTR, bp->DTR); | |
888 | spin_unlock_irqrestore(&riscom_lock, flags); | |
889 | return CD; | |
890 | } | |
891 | ||
9492e135 | 892 | static int rc_open(struct tty_struct *tty, struct file *filp) |
1da177e4 LT |
893 | { |
894 | int board; | |
895 | int error; | |
9492e135 AC |
896 | struct riscom_port *port; |
897 | struct riscom_board *bp; | |
898 | ||
1da177e4 LT |
899 | board = RC_BOARD(tty->index); |
900 | if (board >= RC_NBOARD || !(rc_board[board].flags & RC_BOARD_PRESENT)) | |
901 | return -ENODEV; | |
9492e135 | 902 | |
1da177e4 LT |
903 | bp = &rc_board[board]; |
904 | port = rc_port + board * RC_NPORT + RC_PORT(tty->index); | |
905 | if (rc_paranoia_check(port, tty->name, "rc_open")) | |
906 | return -ENODEV; | |
9492e135 AC |
907 | |
908 | error = rc_setup_board(bp); | |
909 | if (error) | |
1da177e4 | 910 | return error; |
9492e135 | 911 | |
85f8f810 | 912 | port->port.count++; |
1da177e4 | 913 | tty->driver_data = port; |
6ff1ab28 | 914 | tty_port_tty_set(&port->port, tty); |
9492e135 | 915 | |
6ff1ab28 | 916 | error = rc_setup_port(tty, bp, port); |
9492e135 | 917 | if (error == 0) |
36c621d8 | 918 | error = tty_port_block_til_ready(&port->port, tty, filp); |
9492e135 | 919 | return error; |
1da177e4 LT |
920 | } |
921 | ||
978e595f AC |
922 | static void rc_flush_buffer(struct tty_struct *tty) |
923 | { | |
c9f19e96 | 924 | struct riscom_port *port = tty->driver_data; |
978e595f AC |
925 | unsigned long flags; |
926 | ||
927 | if (rc_paranoia_check(port, tty->name, "rc_flush_buffer")) | |
928 | return; | |
929 | ||
930 | spin_lock_irqsave(&riscom_lock, flags); | |
978e595f | 931 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; |
978e595f AC |
932 | spin_unlock_irqrestore(&riscom_lock, flags); |
933 | ||
934 | tty_wakeup(tty); | |
935 | } | |
936 | ||
90387f5e | 937 | static void rc_close_port(struct tty_port *port) |
1da177e4 | 938 | { |
1da177e4 | 939 | unsigned long flags; |
c1469425 AC |
940 | struct riscom_port *rp = container_of(port, struct riscom_port, port); |
941 | struct riscom_board *bp = port_Board(rp); | |
1da177e4 | 942 | unsigned long timeout; |
a6614999 | 943 | |
1da177e4 LT |
944 | /* |
945 | * At this point we stop accepting input. To do this, we | |
946 | * disable the receive line status interrupts, and tell the | |
947 | * interrupt driver to stop checking the data ready bit in the | |
948 | * line status register. | |
949 | */ | |
c2ba38cd AC |
950 | |
951 | spin_lock_irqsave(&riscom_lock, flags); | |
c1469425 AC |
952 | rp->IER &= ~IER_RXD; |
953 | if (port->flags & ASYNC_INITIALIZED) { | |
954 | rp->IER &= ~IER_TXRDY; | |
955 | rp->IER |= IER_TXEMPTY; | |
956 | rc_out(bp, CD180_CAR, port_No(rp)); | |
957 | rc_out(bp, CD180_IER, rp->IER); | |
1da177e4 LT |
958 | /* |
959 | * Before we drop DTR, make sure the UART transmitter | |
960 | * has completely drained; this is especially | |
961 | * important if there is a transmit FIFO! | |
962 | */ | |
9492e135 | 963 | timeout = jiffies + HZ; |
c1469425 | 964 | while (rp->IER & IER_TXEMPTY) { |
c2ba38cd | 965 | spin_unlock_irqrestore(&riscom_lock, flags); |
c1469425 | 966 | msleep_interruptible(jiffies_to_msecs(rp->timeout)); |
c2ba38cd | 967 | spin_lock_irqsave(&riscom_lock, flags); |
1da177e4 LT |
968 | if (time_after(jiffies, timeout)) |
969 | break; | |
970 | } | |
971 | } | |
90387f5e | 972 | rc_shutdown_port(port->tty, bp, rp); |
c2ba38cd | 973 | spin_unlock_irqrestore(&riscom_lock, flags); |
c1469425 AC |
974 | } |
975 | ||
976 | static void rc_close(struct tty_struct *tty, struct file *filp) | |
977 | { | |
978 | struct riscom_port *port = tty->driver_data; | |
979 | ||
980 | if (!port || rc_paranoia_check(port, tty->name, "close")) | |
981 | return; | |
6ff1ab28 | 982 | tty_port_close(&port->port, tty, filp); |
1da177e4 LT |
983 | } |
984 | ||
9492e135 | 985 | static int rc_write(struct tty_struct *tty, |
1da177e4 LT |
986 | const unsigned char *buf, int count) |
987 | { | |
c9f19e96 | 988 | struct riscom_port *port = tty->driver_data; |
1da177e4 LT |
989 | struct riscom_board *bp; |
990 | int c, total = 0; | |
991 | unsigned long flags; | |
9492e135 | 992 | |
1da177e4 LT |
993 | if (rc_paranoia_check(port, tty->name, "rc_write")) |
994 | return 0; | |
9492e135 | 995 | |
1da177e4 LT |
996 | bp = port_Board(port); |
997 | ||
1da177e4 | 998 | while (1) { |
d9afa435 JG |
999 | spin_lock_irqsave(&riscom_lock, flags); |
1000 | ||
1da177e4 LT |
1001 | c = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1, |
1002 | SERIAL_XMIT_SIZE - port->xmit_head)); | |
d9afa435 JG |
1003 | if (c <= 0) |
1004 | break; /* lock continues to be held */ | |
1da177e4 | 1005 | |
85f8f810 | 1006 | memcpy(port->port.xmit_buf + port->xmit_head, buf, c); |
1da177e4 LT |
1007 | port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1); |
1008 | port->xmit_cnt += c; | |
d9afa435 JG |
1009 | |
1010 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
1011 | |
1012 | buf += c; | |
1013 | count -= c; | |
1014 | total += c; | |
1015 | } | |
1016 | ||
1da177e4 LT |
1017 | if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped && |
1018 | !(port->IER & IER_TXRDY)) { | |
1019 | port->IER |= IER_TXRDY; | |
1020 | rc_out(bp, CD180_CAR, port_No(port)); | |
1021 | rc_out(bp, CD180_IER, port->IER); | |
1022 | } | |
d9afa435 JG |
1023 | |
1024 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
1025 | |
1026 | return total; | |
1027 | } | |
1028 | ||
9492e135 | 1029 | static int rc_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 | 1030 | { |
c9f19e96 | 1031 | struct riscom_port *port = tty->driver_data; |
1da177e4 | 1032 | unsigned long flags; |
bbbbb96f | 1033 | int ret = 0; |
1da177e4 LT |
1034 | |
1035 | if (rc_paranoia_check(port, tty->name, "rc_put_char")) | |
bbbbb96f | 1036 | return 0; |
1da177e4 | 1037 | |
d9afa435 | 1038 | spin_lock_irqsave(&riscom_lock, flags); |
9492e135 | 1039 | |
1da177e4 LT |
1040 | if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) |
1041 | goto out; | |
1042 | ||
85f8f810 | 1043 | port->port.xmit_buf[port->xmit_head++] = ch; |
1da177e4 LT |
1044 | port->xmit_head &= SERIAL_XMIT_SIZE - 1; |
1045 | port->xmit_cnt++; | |
bbbbb96f | 1046 | ret = 1; |
d9afa435 JG |
1047 | |
1048 | out: | |
1049 | spin_unlock_irqrestore(&riscom_lock, flags); | |
bbbbb96f | 1050 | return ret; |
1da177e4 LT |
1051 | } |
1052 | ||
9492e135 | 1053 | static void rc_flush_chars(struct tty_struct *tty) |
1da177e4 | 1054 | { |
c9f19e96 | 1055 | struct riscom_port *port = tty->driver_data; |
1da177e4 | 1056 | unsigned long flags; |
9492e135 | 1057 | |
1da177e4 LT |
1058 | if (rc_paranoia_check(port, tty->name, "rc_flush_chars")) |
1059 | return; | |
9492e135 | 1060 | |
d99101fd | 1061 | if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped) |
1da177e4 LT |
1062 | return; |
1063 | ||
d9afa435 JG |
1064 | spin_lock_irqsave(&riscom_lock, flags); |
1065 | ||
1da177e4 LT |
1066 | port->IER |= IER_TXRDY; |
1067 | rc_out(port_Board(port), CD180_CAR, port_No(port)); | |
1068 | rc_out(port_Board(port), CD180_IER, port->IER); | |
d9afa435 JG |
1069 | |
1070 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
1071 | } |
1072 | ||
9492e135 | 1073 | static int rc_write_room(struct tty_struct *tty) |
1da177e4 | 1074 | { |
c9f19e96 | 1075 | struct riscom_port *port = tty->driver_data; |
1da177e4 | 1076 | int ret; |
9492e135 | 1077 | |
1da177e4 LT |
1078 | if (rc_paranoia_check(port, tty->name, "rc_write_room")) |
1079 | return 0; | |
1080 | ||
1081 | ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; | |
1082 | if (ret < 0) | |
1083 | ret = 0; | |
1084 | return ret; | |
1085 | } | |
1086 | ||
1087 | static int rc_chars_in_buffer(struct tty_struct *tty) | |
1088 | { | |
c9f19e96 | 1089 | struct riscom_port *port = tty->driver_data; |
9492e135 | 1090 | |
1da177e4 LT |
1091 | if (rc_paranoia_check(port, tty->name, "rc_chars_in_buffer")) |
1092 | return 0; | |
9492e135 | 1093 | |
1da177e4 LT |
1094 | return port->xmit_cnt; |
1095 | } | |
1096 | ||
1da177e4 LT |
1097 | static int rc_tiocmget(struct tty_struct *tty, struct file *file) |
1098 | { | |
c9f19e96 | 1099 | struct riscom_port *port = tty->driver_data; |
9492e135 | 1100 | struct riscom_board *bp; |
1da177e4 LT |
1101 | unsigned char status; |
1102 | unsigned int result; | |
1103 | unsigned long flags; | |
1104 | ||
bf9d8929 | 1105 | if (rc_paranoia_check(port, tty->name, __func__)) |
1da177e4 LT |
1106 | return -ENODEV; |
1107 | ||
1108 | bp = port_Board(port); | |
d9afa435 JG |
1109 | |
1110 | spin_lock_irqsave(&riscom_lock, flags); | |
1111 | ||
1da177e4 LT |
1112 | rc_out(bp, CD180_CAR, port_No(port)); |
1113 | status = rc_in(bp, CD180_MSVR); | |
1114 | result = rc_in(bp, RC_RI) & (1u << port_No(port)) ? 0 : TIOCM_RNG; | |
d9afa435 JG |
1115 | |
1116 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1117 | ||
1da177e4 LT |
1118 | result |= ((status & MSVR_RTS) ? TIOCM_RTS : 0) |
1119 | | ((status & MSVR_DTR) ? TIOCM_DTR : 0) | |
1120 | | ((status & MSVR_CD) ? TIOCM_CAR : 0) | |
1121 | | ((status & MSVR_DSR) ? TIOCM_DSR : 0) | |
1122 | | ((status & MSVR_CTS) ? TIOCM_CTS : 0); | |
1123 | return result; | |
1124 | } | |
1125 | ||
1126 | static int rc_tiocmset(struct tty_struct *tty, struct file *file, | |
1127 | unsigned int set, unsigned int clear) | |
1128 | { | |
c9f19e96 | 1129 | struct riscom_port *port = tty->driver_data; |
1da177e4 LT |
1130 | unsigned long flags; |
1131 | struct riscom_board *bp; | |
1132 | ||
bf9d8929 | 1133 | if (rc_paranoia_check(port, tty->name, __func__)) |
1da177e4 LT |
1134 | return -ENODEV; |
1135 | ||
1136 | bp = port_Board(port); | |
1137 | ||
d9afa435 JG |
1138 | spin_lock_irqsave(&riscom_lock, flags); |
1139 | ||
1da177e4 LT |
1140 | if (set & TIOCM_RTS) |
1141 | port->MSVR |= MSVR_RTS; | |
1142 | if (set & TIOCM_DTR) | |
1143 | bp->DTR &= ~(1u << port_No(port)); | |
1144 | ||
1145 | if (clear & TIOCM_RTS) | |
1146 | port->MSVR &= ~MSVR_RTS; | |
1147 | if (clear & TIOCM_DTR) | |
1148 | bp->DTR |= (1u << port_No(port)); | |
1149 | ||
1150 | rc_out(bp, CD180_CAR, port_No(port)); | |
1151 | rc_out(bp, CD180_MSVR, port->MSVR); | |
1152 | rc_out(bp, RC_DTR, bp->DTR); | |
d9afa435 JG |
1153 | |
1154 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1155 | ||
1da177e4 LT |
1156 | return 0; |
1157 | } | |
1158 | ||
781cff5c | 1159 | static int rc_send_break(struct tty_struct *tty, int length) |
1da177e4 | 1160 | { |
c9f19e96 | 1161 | struct riscom_port *port = tty->driver_data; |
1da177e4 LT |
1162 | struct riscom_board *bp = port_Board(port); |
1163 | unsigned long flags; | |
9492e135 | 1164 | |
781cff5c AC |
1165 | if (length == 0 || length == -1) |
1166 | return -EOPNOTSUPP; | |
1167 | ||
d9afa435 JG |
1168 | spin_lock_irqsave(&riscom_lock, flags); |
1169 | ||
1da177e4 LT |
1170 | port->break_length = RISCOM_TPS / HZ * length; |
1171 | port->COR2 |= COR2_ETC; | |
1172 | port->IER |= IER_TXRDY; | |
1173 | rc_out(bp, CD180_CAR, port_No(port)); | |
1174 | rc_out(bp, CD180_COR2, port->COR2); | |
1175 | rc_out(bp, CD180_IER, port->IER); | |
1176 | rc_wait_CCR(bp); | |
1177 | rc_out(bp, CD180_CCR, CCR_CORCHG2); | |
1178 | rc_wait_CCR(bp); | |
d9afa435 JG |
1179 | |
1180 | spin_unlock_irqrestore(&riscom_lock, flags); | |
781cff5c | 1181 | return 0; |
1da177e4 LT |
1182 | } |
1183 | ||
6ff1ab28 | 1184 | static int rc_set_serial_info(struct tty_struct *tty, struct riscom_port *port, |
9492e135 | 1185 | struct serial_struct __user *newinfo) |
1da177e4 LT |
1186 | { |
1187 | struct serial_struct tmp; | |
1188 | struct riscom_board *bp = port_Board(port); | |
1189 | int change_speed; | |
9492e135 | 1190 | |
1da177e4 LT |
1191 | if (copy_from_user(&tmp, newinfo, sizeof(tmp))) |
1192 | return -EFAULT; | |
9492e135 | 1193 | |
85f8f810 | 1194 | change_speed = ((port->port.flags & ASYNC_SPD_MASK) != |
1da177e4 | 1195 | (tmp.flags & ASYNC_SPD_MASK)); |
9492e135 | 1196 | |
1da177e4 | 1197 | if (!capable(CAP_SYS_ADMIN)) { |
44b7d1b3 AC |
1198 | if ((tmp.close_delay != port->port.close_delay) || |
1199 | (tmp.closing_wait != port->port.closing_wait) || | |
1da177e4 | 1200 | ((tmp.flags & ~ASYNC_USR_MASK) != |
85f8f810 | 1201 | (port->port.flags & ~ASYNC_USR_MASK))) |
1da177e4 | 1202 | return -EPERM; |
85f8f810 | 1203 | port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) | |
1da177e4 LT |
1204 | (tmp.flags & ASYNC_USR_MASK)); |
1205 | } else { | |
85f8f810 | 1206 | port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) | |
1da177e4 | 1207 | (tmp.flags & ASYNC_FLAGS)); |
44b7d1b3 AC |
1208 | port->port.close_delay = tmp.close_delay; |
1209 | port->port.closing_wait = tmp.closing_wait; | |
1da177e4 LT |
1210 | } |
1211 | if (change_speed) { | |
d9afa435 JG |
1212 | unsigned long flags; |
1213 | ||
1214 | spin_lock_irqsave(&riscom_lock, flags); | |
6ff1ab28 | 1215 | rc_change_speed(tty, bp, port); |
d9afa435 | 1216 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1217 | } |
1218 | return 0; | |
1219 | } | |
1220 | ||
9492e135 | 1221 | static int rc_get_serial_info(struct riscom_port *port, |
1da177e4 LT |
1222 | struct serial_struct __user *retinfo) |
1223 | { | |
1224 | struct serial_struct tmp; | |
1225 | struct riscom_board *bp = port_Board(port); | |
9492e135 | 1226 | |
1da177e4 LT |
1227 | memset(&tmp, 0, sizeof(tmp)); |
1228 | tmp.type = PORT_CIRRUS; | |
1229 | tmp.line = port - rc_port; | |
1230 | tmp.port = bp->base; | |
1231 | tmp.irq = bp->irq; | |
85f8f810 | 1232 | tmp.flags = port->port.flags; |
1da177e4 | 1233 | tmp.baud_base = (RC_OSCFREQ + CD180_TPC/2) / CD180_TPC; |
44b7d1b3 AC |
1234 | tmp.close_delay = port->port.close_delay * HZ/100; |
1235 | tmp.closing_wait = port->port.closing_wait * HZ/100; | |
1da177e4 LT |
1236 | tmp.xmit_fifo_size = CD180_NFIFO; |
1237 | return copy_to_user(retinfo, &tmp, sizeof(tmp)) ? -EFAULT : 0; | |
1238 | } | |
1239 | ||
9492e135 | 1240 | static int rc_ioctl(struct tty_struct *tty, struct file *filp, |
1da177e4 | 1241 | unsigned int cmd, unsigned long arg) |
1da177e4 | 1242 | { |
c9f19e96 | 1243 | struct riscom_port *port = tty->driver_data; |
1da177e4 | 1244 | void __user *argp = (void __user *)arg; |
781cff5c | 1245 | int retval; |
9492e135 | 1246 | |
1da177e4 LT |
1247 | if (rc_paranoia_check(port, tty->name, "rc_ioctl")) |
1248 | return -ENODEV; | |
9492e135 | 1249 | |
1da177e4 | 1250 | switch (cmd) { |
9492e135 AC |
1251 | case TIOCGSERIAL: |
1252 | lock_kernel(); | |
eb174552 AC |
1253 | retval = rc_get_serial_info(port, argp); |
1254 | unlock_kernel(); | |
1da177e4 | 1255 | break; |
9492e135 AC |
1256 | case TIOCSSERIAL: |
1257 | lock_kernel(); | |
6ff1ab28 | 1258 | retval = rc_set_serial_info(tty, port, argp); |
eb174552 AC |
1259 | unlock_kernel(); |
1260 | break; | |
9492e135 | 1261 | default: |
eb174552 | 1262 | retval = -ENOIOCTLCMD; |
1da177e4 | 1263 | } |
eb174552 | 1264 | return retval; |
1da177e4 LT |
1265 | } |
1266 | ||
9492e135 | 1267 | static void rc_throttle(struct tty_struct *tty) |
1da177e4 | 1268 | { |
c9f19e96 | 1269 | struct riscom_port *port = tty->driver_data; |
1da177e4 LT |
1270 | struct riscom_board *bp; |
1271 | unsigned long flags; | |
9492e135 | 1272 | |
1da177e4 LT |
1273 | if (rc_paranoia_check(port, tty->name, "rc_throttle")) |
1274 | return; | |
1da177e4 | 1275 | bp = port_Board(port); |
d9afa435 JG |
1276 | |
1277 | spin_lock_irqsave(&riscom_lock, flags); | |
1da177e4 LT |
1278 | port->MSVR &= ~MSVR_RTS; |
1279 | rc_out(bp, CD180_CAR, port_No(port)); | |
d9afa435 | 1280 | if (I_IXOFF(tty)) { |
1da177e4 LT |
1281 | rc_wait_CCR(bp); |
1282 | rc_out(bp, CD180_CCR, CCR_SSCH2); | |
1283 | rc_wait_CCR(bp); | |
1284 | } | |
1285 | rc_out(bp, CD180_MSVR, port->MSVR); | |
d9afa435 | 1286 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1287 | } |
1288 | ||
9492e135 | 1289 | static void rc_unthrottle(struct tty_struct *tty) |
1da177e4 | 1290 | { |
c9f19e96 | 1291 | struct riscom_port *port = tty->driver_data; |
1da177e4 LT |
1292 | struct riscom_board *bp; |
1293 | unsigned long flags; | |
9492e135 | 1294 | |
1da177e4 LT |
1295 | if (rc_paranoia_check(port, tty->name, "rc_unthrottle")) |
1296 | return; | |
1da177e4 | 1297 | bp = port_Board(port); |
d9afa435 | 1298 | |
9492e135 | 1299 | spin_lock_irqsave(&riscom_lock, flags); |
1da177e4 LT |
1300 | port->MSVR |= MSVR_RTS; |
1301 | rc_out(bp, CD180_CAR, port_No(port)); | |
1302 | if (I_IXOFF(tty)) { | |
1303 | rc_wait_CCR(bp); | |
1304 | rc_out(bp, CD180_CCR, CCR_SSCH1); | |
1305 | rc_wait_CCR(bp); | |
1306 | } | |
1307 | rc_out(bp, CD180_MSVR, port->MSVR); | |
d9afa435 | 1308 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1309 | } |
1310 | ||
9492e135 | 1311 | static void rc_stop(struct tty_struct *tty) |
1da177e4 | 1312 | { |
c9f19e96 | 1313 | struct riscom_port *port = tty->driver_data; |
1da177e4 LT |
1314 | struct riscom_board *bp; |
1315 | unsigned long flags; | |
9492e135 | 1316 | |
1da177e4 LT |
1317 | if (rc_paranoia_check(port, tty->name, "rc_stop")) |
1318 | return; | |
9492e135 | 1319 | |
1da177e4 | 1320 | bp = port_Board(port); |
d9afa435 | 1321 | |
9492e135 | 1322 | spin_lock_irqsave(&riscom_lock, flags); |
1da177e4 LT |
1323 | port->IER &= ~IER_TXRDY; |
1324 | rc_out(bp, CD180_CAR, port_No(port)); | |
1325 | rc_out(bp, CD180_IER, port->IER); | |
d9afa435 | 1326 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1327 | } |
1328 | ||
9492e135 | 1329 | static void rc_start(struct tty_struct *tty) |
1da177e4 | 1330 | { |
c9f19e96 | 1331 | struct riscom_port *port = tty->driver_data; |
1da177e4 LT |
1332 | struct riscom_board *bp; |
1333 | unsigned long flags; | |
9492e135 | 1334 | |
1da177e4 LT |
1335 | if (rc_paranoia_check(port, tty->name, "rc_start")) |
1336 | return; | |
9492e135 | 1337 | |
1da177e4 | 1338 | bp = port_Board(port); |
9492e135 | 1339 | |
d9afa435 JG |
1340 | spin_lock_irqsave(&riscom_lock, flags); |
1341 | ||
85f8f810 | 1342 | if (port->xmit_cnt && port->port.xmit_buf && !(port->IER & IER_TXRDY)) { |
1da177e4 LT |
1343 | port->IER |= IER_TXRDY; |
1344 | rc_out(bp, CD180_CAR, port_No(port)); | |
1345 | rc_out(bp, CD180_IER, port->IER); | |
1346 | } | |
d9afa435 | 1347 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1348 | } |
1349 | ||
9492e135 | 1350 | static void rc_hangup(struct tty_struct *tty) |
1da177e4 | 1351 | { |
c9f19e96 | 1352 | struct riscom_port *port = tty->driver_data; |
9492e135 | 1353 | |
1da177e4 LT |
1354 | if (rc_paranoia_check(port, tty->name, "rc_hangup")) |
1355 | return; | |
9492e135 | 1356 | |
6ff1ab28 AC |
1357 | rc_shutdown_port(tty, port_Board(port), port); |
1358 | tty_port_hangup(&port->port); | |
1da177e4 LT |
1359 | } |
1360 | ||
9492e135 AC |
1361 | static void rc_set_termios(struct tty_struct *tty, |
1362 | struct ktermios *old_termios) | |
1da177e4 | 1363 | { |
c9f19e96 | 1364 | struct riscom_port *port = tty->driver_data; |
1da177e4 | 1365 | unsigned long flags; |
9492e135 | 1366 | |
1da177e4 LT |
1367 | if (rc_paranoia_check(port, tty->name, "rc_set_termios")) |
1368 | return; | |
1da177e4 | 1369 | |
d9afa435 | 1370 | spin_lock_irqsave(&riscom_lock, flags); |
6ff1ab28 | 1371 | rc_change_speed(tty, port_Board(port), port); |
d9afa435 | 1372 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1373 | |
1374 | if ((old_termios->c_cflag & CRTSCTS) && | |
1375 | !(tty->termios->c_cflag & CRTSCTS)) { | |
1376 | tty->hw_stopped = 0; | |
1377 | rc_start(tty); | |
1378 | } | |
1379 | } | |
1380 | ||
b68e31d0 | 1381 | static const struct tty_operations riscom_ops = { |
1da177e4 LT |
1382 | .open = rc_open, |
1383 | .close = rc_close, | |
1384 | .write = rc_write, | |
1385 | .put_char = rc_put_char, | |
1386 | .flush_chars = rc_flush_chars, | |
1387 | .write_room = rc_write_room, | |
1388 | .chars_in_buffer = rc_chars_in_buffer, | |
1389 | .flush_buffer = rc_flush_buffer, | |
1390 | .ioctl = rc_ioctl, | |
1391 | .throttle = rc_throttle, | |
1392 | .unthrottle = rc_unthrottle, | |
1393 | .set_termios = rc_set_termios, | |
1394 | .stop = rc_stop, | |
1395 | .start = rc_start, | |
1396 | .hangup = rc_hangup, | |
1397 | .tiocmget = rc_tiocmget, | |
1398 | .tiocmset = rc_tiocmset, | |
781cff5c | 1399 | .break_ctl = rc_send_break, |
1da177e4 LT |
1400 | }; |
1401 | ||
31f35939 AC |
1402 | static const struct tty_port_operations riscom_port_ops = { |
1403 | .carrier_raised = carrier_raised, | |
6ff1ab28 | 1404 | .shutdown = rc_close_port, |
31f35939 AC |
1405 | }; |
1406 | ||
1407 | ||
1386a820 | 1408 | static int __init rc_init_drivers(void) |
1da177e4 LT |
1409 | { |
1410 | int error; | |
1411 | int i; | |
1412 | ||
1413 | riscom_driver = alloc_tty_driver(RC_NBOARD * RC_NPORT); | |
9492e135 | 1414 | if (!riscom_driver) |
1da177e4 | 1415 | return -ENOMEM; |
9492e135 | 1416 | |
1da177e4 LT |
1417 | riscom_driver->owner = THIS_MODULE; |
1418 | riscom_driver->name = "ttyL"; | |
1da177e4 LT |
1419 | riscom_driver->major = RISCOM8_NORMAL_MAJOR; |
1420 | riscom_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1421 | riscom_driver->subtype = SERIAL_TYPE_NORMAL; | |
1422 | riscom_driver->init_termios = tty_std_termios; | |
1423 | riscom_driver->init_termios.c_cflag = | |
1424 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
606d099c AC |
1425 | riscom_driver->init_termios.c_ispeed = 9600; |
1426 | riscom_driver->init_termios.c_ospeed = 9600; | |
781cff5c | 1427 | riscom_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_HARDWARE_BREAK; |
1da177e4 | 1428 | tty_set_operations(riscom_driver, &riscom_ops); |
9492e135 AC |
1429 | error = tty_register_driver(riscom_driver); |
1430 | if (error != 0) { | |
1da177e4 LT |
1431 | put_tty_driver(riscom_driver); |
1432 | printk(KERN_ERR "rc: Couldn't register RISCom/8 driver, " | |
9492e135 | 1433 | "error = %d\n", error); |
1da177e4 LT |
1434 | return 1; |
1435 | } | |
1da177e4 LT |
1436 | memset(rc_port, 0, sizeof(rc_port)); |
1437 | for (i = 0; i < RC_NPORT * RC_NBOARD; i++) { | |
85f8f810 | 1438 | tty_port_init(&rc_port[i].port); |
31f35939 | 1439 | rc_port[i].port.ops = &riscom_port_ops; |
44b7d1b3 | 1440 | rc_port[i].magic = RISCOM8_MAGIC; |
1da177e4 | 1441 | } |
1da177e4 LT |
1442 | return 0; |
1443 | } | |
1444 | ||
1445 | static void rc_release_drivers(void) | |
1446 | { | |
1da177e4 LT |
1447 | tty_unregister_driver(riscom_driver); |
1448 | put_tty_driver(riscom_driver); | |
1da177e4 LT |
1449 | } |
1450 | ||
1451 | #ifndef MODULE | |
1452 | /* | |
1453 | * Called at boot time. | |
9492e135 | 1454 | * |
1da177e4 LT |
1455 | * You can specify IO base for up to RC_NBOARD cards, |
1456 | * using line "riscom8=0xiobase1,0xiobase2,.." at LILO prompt. | |
1457 | * Note that there will be no probing at default | |
1458 | * addresses in this case. | |
1459 | * | |
9492e135 | 1460 | */ |
1da177e4 LT |
1461 | static int __init riscom8_setup(char *str) |
1462 | { | |
1463 | int ints[RC_NBOARD]; | |
1464 | int i; | |
1465 | ||
1466 | str = get_options(str, ARRAY_SIZE(ints), ints); | |
1467 | ||
1468 | for (i = 0; i < RC_NBOARD; i++) { | |
1469 | if (i < ints[0]) | |
1470 | rc_board[i].base = ints[i+1]; | |
9492e135 | 1471 | else |
1da177e4 LT |
1472 | rc_board[i].base = 0; |
1473 | } | |
1474 | return 1; | |
1475 | } | |
1476 | ||
1477 | __setup("riscom8=", riscom8_setup); | |
1478 | #endif | |
1479 | ||
1480 | static char banner[] __initdata = | |
1481 | KERN_INFO "rc: SDL RISCom/8 card driver v1.1, (c) D.Gorodchanin " | |
1482 | "1994-1996.\n"; | |
1483 | static char no_boards_msg[] __initdata = | |
1484 | KERN_INFO "rc: No RISCom/8 boards detected.\n"; | |
1485 | ||
9492e135 AC |
1486 | /* |
1487 | * This routine must be called by kernel at boot time | |
1da177e4 LT |
1488 | */ |
1489 | static int __init riscom8_init(void) | |
1490 | { | |
1491 | int i; | |
1492 | int found = 0; | |
1493 | ||
1494 | printk(banner); | |
1495 | ||
9492e135 | 1496 | if (rc_init_drivers()) |
1da177e4 LT |
1497 | return -EIO; |
1498 | ||
9492e135 AC |
1499 | for (i = 0; i < RC_NBOARD; i++) |
1500 | if (rc_board[i].base && !rc_probe(&rc_board[i])) | |
1da177e4 | 1501 | found++; |
1da177e4 LT |
1502 | if (!found) { |
1503 | rc_release_drivers(); | |
1504 | printk(no_boards_msg); | |
1505 | return -EIO; | |
1506 | } | |
1507 | return 0; | |
1508 | } | |
1509 | ||
1510 | #ifdef MODULE | |
1511 | static int iobase; | |
1512 | static int iobase1; | |
1513 | static int iobase2; | |
1514 | static int iobase3; | |
8d3b33f6 RR |
1515 | module_param(iobase, int, 0); |
1516 | module_param(iobase1, int, 0); | |
1517 | module_param(iobase2, int, 0); | |
1518 | module_param(iobase3, int, 0); | |
1da177e4 LT |
1519 | |
1520 | MODULE_LICENSE("GPL"); | |
5c9f5806 | 1521 | MODULE_ALIAS_CHARDEV_MAJOR(RISCOM8_NORMAL_MAJOR); |
1da177e4 LT |
1522 | #endif /* MODULE */ |
1523 | ||
1524 | /* | |
1525 | * You can setup up to 4 boards (current value of RC_NBOARD) | |
1526 | * by specifying "iobase=0xXXX iobase1=0xXXX ..." as insmod parameter. | |
1527 | * | |
1528 | */ | |
9492e135 | 1529 | static int __init riscom8_init_module(void) |
1da177e4 LT |
1530 | { |
1531 | #ifdef MODULE | |
1532 | int i; | |
1533 | ||
1534 | if (iobase || iobase1 || iobase2 || iobase3) { | |
9492e135 | 1535 | for (i = 0; i < RC_NBOARD; i++) |
9efda797 | 1536 | rc_board[i].base = 0; |
1da177e4 LT |
1537 | } |
1538 | ||
1539 | if (iobase) | |
1540 | rc_board[0].base = iobase; | |
1541 | if (iobase1) | |
1542 | rc_board[1].base = iobase1; | |
1543 | if (iobase2) | |
1544 | rc_board[2].base = iobase2; | |
1545 | if (iobase3) | |
1546 | rc_board[3].base = iobase3; | |
1547 | #endif /* MODULE */ | |
1548 | ||
1549 | return riscom8_init(); | |
1550 | } | |
9492e135 AC |
1551 | |
1552 | static void __exit riscom8_exit_module(void) | |
1da177e4 LT |
1553 | { |
1554 | int i; | |
9492e135 | 1555 | |
1da177e4 | 1556 | rc_release_drivers(); |
9492e135 AC |
1557 | for (i = 0; i < RC_NBOARD; i++) |
1558 | if (rc_board[i].flags & RC_BOARD_PRESENT) | |
1da177e4 | 1559 | rc_release_io_range(&rc_board[i]); |
9492e135 | 1560 | |
1da177e4 LT |
1561 | } |
1562 | ||
1563 | module_init(riscom8_init_module); | |
1564 | module_exit(riscom8_exit_module); |