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> |
5c9f5806 | 51 | #include <linux/device.h> |
1da177e4 | 52 | |
9492e135 | 53 | #include <linux/uaccess.h> |
1da177e4 LT |
54 | |
55 | #include "riscom8.h" | |
56 | #include "riscom8_reg.h" | |
57 | ||
58 | /* Am I paranoid or not ? ;-) */ | |
59 | #define RISCOM_PARANOIA_CHECK | |
60 | ||
9492e135 AC |
61 | /* |
62 | * Crazy InteliCom/8 boards sometimes have swapped CTS & DSR signals. | |
1da177e4 | 63 | * You can slightly speed up things by #undefing the following option, |
9492e135 | 64 | * if you are REALLY sure that your board is correct one. |
1da177e4 LT |
65 | */ |
66 | ||
67 | #define RISCOM_BRAIN_DAMAGED_CTS | |
68 | ||
9492e135 | 69 | /* |
1da177e4 LT |
70 | * The following defines are mostly for testing purposes. But if you need |
71 | * some nice reporting in your syslog, you can define them also. | |
72 | */ | |
73 | #undef RC_REPORT_FIFO | |
74 | #undef RC_REPORT_OVERRUN | |
75 | ||
76 | ||
77 | #define RISCOM_LEGAL_FLAGS \ | |
78 | (ASYNC_HUP_NOTIFY | ASYNC_SAK | ASYNC_SPLIT_TERMIOS | \ | |
79 | ASYNC_SPD_HI | ASYNC_SPEED_VHI | ASYNC_SESSION_LOCKOUT | \ | |
80 | ASYNC_PGRP_LOCKOUT | ASYNC_CALLOUT_NOHUP) | |
81 | ||
1da177e4 | 82 | static struct tty_driver *riscom_driver; |
1da177e4 | 83 | |
d9afa435 JG |
84 | static DEFINE_SPINLOCK(riscom_lock); |
85 | ||
1da177e4 LT |
86 | static struct riscom_board rc_board[RC_NBOARD] = { |
87 | { | |
88 | .base = RC_IOBASE1, | |
89 | }, | |
90 | { | |
91 | .base = RC_IOBASE2, | |
92 | }, | |
93 | { | |
94 | .base = RC_IOBASE3, | |
95 | }, | |
96 | { | |
97 | .base = RC_IOBASE4, | |
98 | }, | |
99 | }; | |
100 | ||
101 | static struct riscom_port rc_port[RC_NBOARD * RC_NPORT]; | |
102 | ||
103 | /* RISCom/8 I/O ports addresses (without address translation) */ | |
104 | static unsigned short rc_ioport[] = { | |
fe971071 | 105 | #if 1 |
1da177e4 | 106 | 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x09, 0x0a, 0x0b, 0x0c, |
fe971071 | 107 | #else |
1da177e4 LT |
108 | 0x01, 0x02, 0x03, 0x04, 0x05, 0x06, 0x07, 0x09, 0x0a, 0x0b, 0x0c, 0x10, |
109 | 0x11, 0x12, 0x18, 0x28, 0x31, 0x32, 0x39, 0x3a, 0x40, 0x41, 0x61, 0x62, | |
110 | 0x63, 0x64, 0x6b, 0x70, 0x71, 0x78, 0x7a, 0x7b, 0x7f, 0x100, 0x101 | |
fe971071 | 111 | #endif |
1da177e4 | 112 | }; |
fe971071 | 113 | #define RC_NIOPORT ARRAY_SIZE(rc_ioport) |
1da177e4 LT |
114 | |
115 | ||
9492e135 | 116 | static int rc_paranoia_check(struct riscom_port const *port, |
1da177e4 LT |
117 | char *name, const char *routine) |
118 | { | |
119 | #ifdef RISCOM_PARANOIA_CHECK | |
120 | static const char badmagic[] = KERN_INFO | |
121 | "rc: Warning: bad riscom port magic number for device %s in %s\n"; | |
122 | static const char badinfo[] = KERN_INFO | |
123 | "rc: Warning: null riscom port for device %s in %s\n"; | |
124 | ||
125 | if (!port) { | |
126 | printk(badinfo, name, routine); | |
127 | return 1; | |
128 | } | |
129 | if (port->magic != RISCOM8_MAGIC) { | |
130 | printk(badmagic, name, routine); | |
131 | return 1; | |
132 | } | |
133 | #endif | |
134 | return 0; | |
135 | } | |
136 | ||
137 | /* | |
9492e135 | 138 | * |
1da177e4 | 139 | * Service functions for RISCom/8 driver. |
9492e135 | 140 | * |
1da177e4 LT |
141 | */ |
142 | ||
143 | /* Get board number from pointer */ | |
9492e135 | 144 | static inline int board_No(struct riscom_board const *bp) |
1da177e4 LT |
145 | { |
146 | return bp - rc_board; | |
147 | } | |
148 | ||
149 | /* Get port number from pointer */ | |
9492e135 | 150 | static inline int port_No(struct riscom_port const *port) |
1da177e4 | 151 | { |
9492e135 | 152 | return RC_PORT(port - rc_port); |
1da177e4 LT |
153 | } |
154 | ||
155 | /* Get pointer to board from pointer to port */ | |
9492e135 | 156 | static inline struct riscom_board *port_Board(struct riscom_port const *port) |
1da177e4 LT |
157 | { |
158 | return &rc_board[RC_BOARD(port - rc_port)]; | |
159 | } | |
160 | ||
161 | /* Input Byte from CL CD180 register */ | |
9492e135 AC |
162 | static inline unsigned char rc_in(struct riscom_board const *bp, |
163 | unsigned short reg) | |
1da177e4 LT |
164 | { |
165 | return inb(bp->base + RC_TO_ISA(reg)); | |
166 | } | |
167 | ||
168 | /* Output Byte to CL CD180 register */ | |
9492e135 | 169 | static inline void rc_out(struct riscom_board const *bp, unsigned short reg, |
1da177e4 LT |
170 | unsigned char val) |
171 | { | |
172 | outb(val, bp->base + RC_TO_ISA(reg)); | |
173 | } | |
174 | ||
175 | /* Wait for Channel Command Register ready */ | |
9492e135 | 176 | static void rc_wait_CCR(struct riscom_board const *bp) |
1da177e4 LT |
177 | { |
178 | unsigned long delay; | |
179 | ||
180 | /* FIXME: need something more descriptive then 100000 :) */ | |
9492e135 | 181 | for (delay = 100000; delay; delay--) |
1da177e4 LT |
182 | if (!rc_in(bp, CD180_CCR)) |
183 | return; | |
9492e135 | 184 | |
1da177e4 LT |
185 | printk(KERN_INFO "rc%d: Timeout waiting for CCR.\n", board_No(bp)); |
186 | } | |
187 | ||
188 | /* | |
189 | * RISCom/8 probe functions. | |
190 | */ | |
191 | ||
9492e135 | 192 | static int rc_request_io_range(struct riscom_board * const bp) |
1da177e4 LT |
193 | { |
194 | int i; | |
9492e135 AC |
195 | |
196 | for (i = 0; i < RC_NIOPORT; i++) | |
1da177e4 LT |
197 | if (!request_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1, |
198 | "RISCom/8")) { | |
199 | goto out_release; | |
200 | } | |
201 | return 0; | |
202 | out_release: | |
203 | printk(KERN_INFO "rc%d: Skipping probe at 0x%03x. IO address in use.\n", | |
204 | board_No(bp), bp->base); | |
9492e135 | 205 | while (--i >= 0) |
1da177e4 LT |
206 | release_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1); |
207 | return 1; | |
208 | } | |
209 | ||
9492e135 | 210 | static void rc_release_io_range(struct riscom_board * const bp) |
1da177e4 LT |
211 | { |
212 | int i; | |
9492e135 AC |
213 | |
214 | for (i = 0; i < RC_NIOPORT; i++) | |
1da177e4 LT |
215 | release_region(RC_TO_ISA(rc_ioport[i]) + bp->base, 1); |
216 | } | |
9492e135 | 217 | |
1da177e4 | 218 | /* Reset and setup CD180 chip */ |
9492e135 | 219 | static void __init rc_init_CD180(struct riscom_board const *bp) |
1da177e4 LT |
220 | { |
221 | unsigned long flags; | |
9492e135 | 222 | |
d9afa435 JG |
223 | spin_lock_irqsave(&riscom_lock, flags); |
224 | ||
9492e135 AC |
225 | rc_out(bp, RC_CTOUT, 0); /* Clear timeout */ |
226 | rc_wait_CCR(bp); /* Wait for CCR ready */ | |
227 | rc_out(bp, CD180_CCR, CCR_HARDRESET); /* Reset CD180 chip */ | |
d9afa435 | 228 | spin_unlock_irqrestore(&riscom_lock, flags); |
9492e135 | 229 | msleep(50); /* Delay 0.05 sec */ |
d9afa435 | 230 | spin_lock_irqsave(&riscom_lock, flags); |
9492e135 AC |
231 | rc_out(bp, CD180_GIVR, RC_ID); /* Set ID for this chip */ |
232 | rc_out(bp, CD180_GICR, 0); /* Clear all bits */ | |
233 | rc_out(bp, CD180_PILR1, RC_ACK_MINT); /* Prio for modem intr */ | |
234 | rc_out(bp, CD180_PILR2, RC_ACK_TINT); /* Prio for tx intr */ | |
235 | rc_out(bp, CD180_PILR3, RC_ACK_RINT); /* Prio for rx intr */ | |
236 | ||
1da177e4 LT |
237 | /* Setting up prescaler. We need 4 ticks per 1 ms */ |
238 | rc_out(bp, CD180_PPRH, (RC_OSCFREQ/(1000000/RISCOM_TPS)) >> 8); | |
239 | rc_out(bp, CD180_PPRL, (RC_OSCFREQ/(1000000/RISCOM_TPS)) & 0xff); | |
9492e135 | 240 | |
d9afa435 | 241 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
242 | } |
243 | ||
244 | /* Main probing routine, also sets irq. */ | |
245 | static int __init rc_probe(struct riscom_board *bp) | |
246 | { | |
247 | unsigned char val1, val2; | |
248 | int irqs = 0; | |
249 | int retries; | |
9492e135 | 250 | |
1da177e4 LT |
251 | bp->irq = 0; |
252 | ||
253 | if (rc_request_io_range(bp)) | |
254 | return 1; | |
9492e135 | 255 | |
1da177e4 LT |
256 | /* Are the I/O ports here ? */ |
257 | rc_out(bp, CD180_PPRL, 0x5a); | |
258 | outb(0xff, 0x80); | |
259 | val1 = rc_in(bp, CD180_PPRL); | |
260 | rc_out(bp, CD180_PPRL, 0xa5); | |
261 | outb(0x00, 0x80); | |
262 | val2 = rc_in(bp, CD180_PPRL); | |
9492e135 | 263 | |
1da177e4 LT |
264 | if ((val1 != 0x5a) || (val2 != 0xa5)) { |
265 | printk(KERN_ERR "rc%d: RISCom/8 Board at 0x%03x not found.\n", | |
266 | board_No(bp), bp->base); | |
267 | goto out_release; | |
268 | } | |
9492e135 | 269 | |
1da177e4 | 270 | /* It's time to find IRQ for this board */ |
9492e135 | 271 | for (retries = 0; retries < 5 && irqs <= 0; retries++) { |
1da177e4 | 272 | irqs = probe_irq_on(); |
9492e135 AC |
273 | rc_init_CD180(bp); /* Reset CD180 chip */ |
274 | rc_out(bp, CD180_CAR, 2); /* Select port 2 */ | |
1da177e4 | 275 | rc_wait_CCR(bp); |
9492e135 AC |
276 | rc_out(bp, CD180_CCR, CCR_TXEN); /* Enable transmitter */ |
277 | rc_out(bp, CD180_IER, IER_TXRDY);/* Enable tx empty intr */ | |
c4ebd927 | 278 | msleep(50); |
1da177e4 | 279 | irqs = probe_irq_off(irqs); |
9492e135 AC |
280 | val1 = rc_in(bp, RC_BSR); /* Get Board Status reg */ |
281 | val2 = rc_in(bp, RC_ACK_TINT); /* ACK interrupt */ | |
282 | rc_init_CD180(bp); /* Reset CD180 again */ | |
283 | ||
1da177e4 LT |
284 | if ((val1 & RC_BSR_TINT) || (val2 != (RC_ID | GIVR_IT_TX))) { |
285 | printk(KERN_ERR "rc%d: RISCom/8 Board at 0x%03x not " | |
286 | "found.\n", board_No(bp), bp->base); | |
287 | goto out_release; | |
288 | } | |
289 | } | |
9492e135 | 290 | |
1da177e4 LT |
291 | if (irqs <= 0) { |
292 | printk(KERN_ERR "rc%d: Can't find IRQ for RISCom/8 board " | |
293 | "at 0x%03x.\n", board_No(bp), bp->base); | |
294 | goto out_release; | |
295 | } | |
296 | bp->irq = irqs; | |
297 | bp->flags |= RC_BOARD_PRESENT; | |
9492e135 | 298 | |
1da177e4 LT |
299 | printk(KERN_INFO "rc%d: RISCom/8 Rev. %c board detected at " |
300 | "0x%03x, IRQ %d.\n", | |
301 | board_No(bp), | |
302 | (rc_in(bp, CD180_GFRCR) & 0x0f) + 'A', /* Board revision */ | |
303 | bp->base, bp->irq); | |
9492e135 | 304 | |
1da177e4 LT |
305 | return 0; |
306 | out_release: | |
307 | rc_release_io_range(bp); | |
308 | return 1; | |
309 | } | |
310 | ||
9492e135 AC |
311 | /* |
312 | * | |
1da177e4 | 313 | * Interrupt processing routines. |
9492e135 | 314 | * |
1da177e4 LT |
315 | */ |
316 | ||
9492e135 AC |
317 | static struct riscom_port *rc_get_port(struct riscom_board const *bp, |
318 | unsigned char const *what) | |
1da177e4 LT |
319 | { |
320 | unsigned char channel; | |
9492e135 AC |
321 | struct riscom_port *port; |
322 | ||
1da177e4 LT |
323 | channel = rc_in(bp, CD180_GICR) >> GICR_CHAN_OFF; |
324 | if (channel < CD180_NCH) { | |
325 | port = &rc_port[board_No(bp) * RC_NPORT + channel]; | |
85f8f810 | 326 | if (port->port.flags & ASYNC_INITIALIZED) |
1da177e4 | 327 | return port; |
1da177e4 | 328 | } |
9492e135 | 329 | printk(KERN_ERR "rc%d: %s interrupt from invalid port %d\n", |
1da177e4 LT |
330 | board_No(bp), what, channel); |
331 | return NULL; | |
332 | } | |
333 | ||
9492e135 | 334 | static void rc_receive_exc(struct riscom_board const *bp) |
1da177e4 LT |
335 | { |
336 | struct riscom_port *port; | |
337 | struct tty_struct *tty; | |
338 | unsigned char status; | |
33f0f88f | 339 | unsigned char ch, flag; |
9492e135 AC |
340 | |
341 | port = rc_get_port(bp, "Receive"); | |
342 | if (port == NULL) | |
1da177e4 LT |
343 | return; |
344 | ||
85f8f810 | 345 | tty = port->port.tty; |
9492e135 AC |
346 | |
347 | #ifdef RC_REPORT_OVERRUN | |
1da177e4 | 348 | status = rc_in(bp, CD180_RCSR); |
33f0f88f | 349 | if (status & RCSR_OE) |
1da177e4 | 350 | port->overrun++; |
1da177e4 | 351 | status &= port->mark_mask; |
9492e135 | 352 | #else |
1da177e4 | 353 | status = rc_in(bp, CD180_RCSR) & port->mark_mask; |
9492e135 | 354 | #endif |
1da177e4 | 355 | ch = rc_in(bp, CD180_RDR); |
9492e135 | 356 | if (!status) |
1da177e4 | 357 | return; |
1da177e4 LT |
358 | if (status & RCSR_TOUT) { |
359 | printk(KERN_WARNING "rc%d: port %d: Receiver timeout. " | |
9492e135 | 360 | "Hardware problems ?\n", |
1da177e4 LT |
361 | board_No(bp), port_No(port)); |
362 | return; | |
9492e135 | 363 | |
1da177e4 LT |
364 | } else if (status & RCSR_BREAK) { |
365 | printk(KERN_INFO "rc%d: port %d: Handling break...\n", | |
366 | board_No(bp), port_No(port)); | |
33f0f88f | 367 | flag = TTY_BREAK; |
85f8f810 | 368 | if (port->port.flags & ASYNC_SAK) |
1da177e4 | 369 | do_SAK(tty); |
9492e135 AC |
370 | |
371 | } else if (status & RCSR_PE) | |
33f0f88f | 372 | flag = TTY_PARITY; |
9492e135 AC |
373 | |
374 | else if (status & RCSR_FE) | |
33f0f88f | 375 | flag = TTY_FRAME; |
9492e135 AC |
376 | |
377 | else if (status & RCSR_OE) | |
33f0f88f | 378 | flag = TTY_OVERRUN; |
1da177e4 | 379 | else |
33f0f88f | 380 | flag = TTY_NORMAL; |
9492e135 | 381 | |
33f0f88f AC |
382 | tty_insert_flip_char(tty, ch, flag); |
383 | tty_flip_buffer_push(tty); | |
1da177e4 LT |
384 | } |
385 | ||
9492e135 | 386 | static void rc_receive(struct riscom_board const *bp) |
1da177e4 LT |
387 | { |
388 | struct riscom_port *port; | |
389 | struct tty_struct *tty; | |
390 | unsigned char count; | |
9492e135 AC |
391 | |
392 | port = rc_get_port(bp, "Receive"); | |
393 | if (port == NULL) | |
1da177e4 | 394 | return; |
9492e135 | 395 | |
85f8f810 | 396 | tty = port->port.tty; |
9492e135 | 397 | |
1da177e4 | 398 | count = rc_in(bp, CD180_RDCR); |
9492e135 | 399 | |
1da177e4 LT |
400 | #ifdef RC_REPORT_FIFO |
401 | port->hits[count > 8 ? 9 : count]++; | |
9492e135 AC |
402 | #endif |
403 | ||
1da177e4 | 404 | while (count--) { |
33f0f88f | 405 | if (tty_buffer_request_room(tty, 1) == 0) { |
1da177e4 LT |
406 | printk(KERN_WARNING "rc%d: port %d: Working around " |
407 | "flip buffer overflow.\n", | |
408 | board_No(bp), port_No(port)); | |
409 | break; | |
410 | } | |
33f0f88f | 411 | tty_insert_flip_char(tty, rc_in(bp, CD180_RDR), TTY_NORMAL); |
1da177e4 | 412 | } |
33f0f88f | 413 | tty_flip_buffer_push(tty); |
1da177e4 LT |
414 | } |
415 | ||
9492e135 | 416 | static void rc_transmit(struct riscom_board const *bp) |
1da177e4 LT |
417 | { |
418 | struct riscom_port *port; | |
419 | struct tty_struct *tty; | |
420 | unsigned char count; | |
9492e135 AC |
421 | |
422 | port = rc_get_port(bp, "Transmit"); | |
423 | if (port == NULL) | |
1da177e4 | 424 | return; |
9492e135 | 425 | |
85f8f810 | 426 | tty = port->port.tty; |
9492e135 AC |
427 | |
428 | if (port->IER & IER_TXEMPTY) { | |
1da177e4 LT |
429 | /* FIFO drained */ |
430 | rc_out(bp, CD180_CAR, port_No(port)); | |
431 | port->IER &= ~IER_TXEMPTY; | |
432 | rc_out(bp, CD180_IER, port->IER); | |
433 | return; | |
434 | } | |
9492e135 | 435 | |
1da177e4 LT |
436 | if ((port->xmit_cnt <= 0 && !port->break_length) |
437 | || tty->stopped || tty->hw_stopped) { | |
438 | rc_out(bp, CD180_CAR, port_No(port)); | |
439 | port->IER &= ~IER_TXRDY; | |
440 | rc_out(bp, CD180_IER, port->IER); | |
441 | return; | |
442 | } | |
9492e135 | 443 | |
1da177e4 LT |
444 | if (port->break_length) { |
445 | if (port->break_length > 0) { | |
446 | if (port->COR2 & COR2_ETC) { | |
447 | rc_out(bp, CD180_TDR, CD180_C_ESC); | |
448 | rc_out(bp, CD180_TDR, CD180_C_SBRK); | |
449 | port->COR2 &= ~COR2_ETC; | |
450 | } | |
451 | count = min_t(int, port->break_length, 0xff); | |
452 | rc_out(bp, CD180_TDR, CD180_C_ESC); | |
453 | rc_out(bp, CD180_TDR, CD180_C_DELAY); | |
454 | rc_out(bp, CD180_TDR, count); | |
9492e135 AC |
455 | port->break_length -= count; |
456 | if (port->break_length == 0) | |
1da177e4 LT |
457 | port->break_length--; |
458 | } else { | |
459 | rc_out(bp, CD180_TDR, CD180_C_ESC); | |
460 | rc_out(bp, CD180_TDR, CD180_C_EBRK); | |
461 | rc_out(bp, CD180_COR2, port->COR2); | |
462 | rc_wait_CCR(bp); | |
463 | rc_out(bp, CD180_CCR, CCR_CORCHG2); | |
464 | port->break_length = 0; | |
465 | } | |
466 | return; | |
467 | } | |
9492e135 | 468 | |
1da177e4 LT |
469 | count = CD180_NFIFO; |
470 | do { | |
85f8f810 | 471 | rc_out(bp, CD180_TDR, port->port.xmit_buf[port->xmit_tail++]); |
1da177e4 LT |
472 | port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1); |
473 | if (--port->xmit_cnt <= 0) | |
474 | break; | |
475 | } while (--count > 0); | |
9492e135 | 476 | |
1da177e4 LT |
477 | if (port->xmit_cnt <= 0) { |
478 | rc_out(bp, CD180_CAR, port_No(port)); | |
479 | port->IER &= ~IER_TXRDY; | |
480 | rc_out(bp, CD180_IER, port->IER); | |
481 | } | |
482 | if (port->xmit_cnt <= port->wakeup_chars) | |
b98e70de | 483 | tty_wakeup(tty); |
1da177e4 LT |
484 | } |
485 | ||
9492e135 | 486 | static void rc_check_modem(struct riscom_board const *bp) |
1da177e4 LT |
487 | { |
488 | struct riscom_port *port; | |
489 | struct tty_struct *tty; | |
490 | unsigned char mcr; | |
9492e135 AC |
491 | |
492 | port = rc_get_port(bp, "Modem"); | |
493 | if (port == NULL) | |
1da177e4 | 494 | return; |
9492e135 | 495 | |
85f8f810 | 496 | tty = port->port.tty; |
9492e135 | 497 | |
1da177e4 | 498 | mcr = rc_in(bp, CD180_MCR); |
9492e135 AC |
499 | if (mcr & MCR_CDCHG) { |
500 | if (rc_in(bp, CD180_MSVR) & MSVR_CD) | |
85f8f810 | 501 | wake_up_interruptible(&port->port.open_wait); |
1da177e4 | 502 | else |
b98e70de | 503 | tty_hangup(tty); |
1da177e4 | 504 | } |
9492e135 | 505 | |
1da177e4 LT |
506 | #ifdef RISCOM_BRAIN_DAMAGED_CTS |
507 | if (mcr & MCR_CTSCHG) { | |
508 | if (rc_in(bp, CD180_MSVR) & MSVR_CTS) { | |
509 | tty->hw_stopped = 0; | |
510 | port->IER |= IER_TXRDY; | |
511 | if (port->xmit_cnt <= port->wakeup_chars) | |
b98e70de | 512 | tty_wakeup(tty); |
1da177e4 LT |
513 | } else { |
514 | tty->hw_stopped = 1; | |
515 | port->IER &= ~IER_TXRDY; | |
516 | } | |
517 | rc_out(bp, CD180_IER, port->IER); | |
518 | } | |
519 | if (mcr & MCR_DSRCHG) { | |
520 | if (rc_in(bp, CD180_MSVR) & MSVR_DSR) { | |
521 | tty->hw_stopped = 0; | |
522 | port->IER |= IER_TXRDY; | |
523 | if (port->xmit_cnt <= port->wakeup_chars) | |
b98e70de | 524 | tty_wakeup(tty); |
1da177e4 LT |
525 | } else { |
526 | tty->hw_stopped = 1; | |
527 | port->IER &= ~IER_TXRDY; | |
528 | } | |
529 | rc_out(bp, CD180_IER, port->IER); | |
530 | } | |
531 | #endif /* RISCOM_BRAIN_DAMAGED_CTS */ | |
9492e135 | 532 | |
1da177e4 LT |
533 | /* Clear change bits */ |
534 | rc_out(bp, CD180_MCR, 0); | |
535 | } | |
536 | ||
537 | /* The main interrupt processing routine */ | |
9492e135 | 538 | static irqreturn_t rc_interrupt(int dummy, void *dev_id) |
1da177e4 LT |
539 | { |
540 | unsigned char status; | |
541 | unsigned char ack; | |
f07ef395 | 542 | struct riscom_board *bp = dev_id; |
1da177e4 LT |
543 | unsigned long loop = 0; |
544 | int handled = 0; | |
545 | ||
c7bec5ab | 546 | if (!(bp->flags & RC_BOARD_ACTIVE)) |
1da177e4 | 547 | return IRQ_NONE; |
c7bec5ab | 548 | |
1da177e4 LT |
549 | while ((++loop < 16) && ((status = ~(rc_in(bp, RC_BSR))) & |
550 | (RC_BSR_TOUT | RC_BSR_TINT | | |
551 | RC_BSR_MINT | RC_BSR_RINT))) { | |
552 | handled = 1; | |
9492e135 | 553 | if (status & RC_BSR_TOUT) |
1da177e4 LT |
554 | printk(KERN_WARNING "rc%d: Got timeout. Hardware " |
555 | "error?\n", board_No(bp)); | |
1da177e4 LT |
556 | else if (status & RC_BSR_RINT) { |
557 | ack = rc_in(bp, RC_ACK_RINT); | |
1da177e4 LT |
558 | if (ack == (RC_ID | GIVR_IT_RCV)) |
559 | rc_receive(bp); | |
560 | else if (ack == (RC_ID | GIVR_IT_REXC)) | |
561 | rc_receive_exc(bp); | |
562 | else | |
563 | printk(KERN_WARNING "rc%d: Bad receive ack " | |
564 | "0x%02x.\n", | |
565 | board_No(bp), ack); | |
1da177e4 LT |
566 | } else if (status & RC_BSR_TINT) { |
567 | ack = rc_in(bp, RC_ACK_TINT); | |
1da177e4 LT |
568 | if (ack == (RC_ID | GIVR_IT_TX)) |
569 | rc_transmit(bp); | |
570 | else | |
571 | printk(KERN_WARNING "rc%d: Bad transmit ack " | |
572 | "0x%02x.\n", | |
573 | board_No(bp), ack); | |
1da177e4 LT |
574 | } else /* if (status & RC_BSR_MINT) */ { |
575 | ack = rc_in(bp, RC_ACK_MINT); | |
9492e135 | 576 | if (ack == (RC_ID | GIVR_IT_MODEM)) |
1da177e4 LT |
577 | rc_check_modem(bp); |
578 | else | |
579 | printk(KERN_WARNING "rc%d: Bad modem ack " | |
580 | "0x%02x.\n", | |
581 | board_No(bp), ack); | |
9492e135 | 582 | } |
1da177e4 LT |
583 | rc_out(bp, CD180_EOIR, 0); /* Mark end of interrupt */ |
584 | rc_out(bp, RC_CTOUT, 0); /* Clear timeout flag */ | |
585 | } | |
586 | return IRQ_RETVAL(handled); | |
587 | } | |
588 | ||
589 | /* | |
590 | * Routines for open & close processing. | |
591 | */ | |
592 | ||
593 | /* Called with disabled interrupts */ | |
9492e135 | 594 | static int rc_setup_board(struct riscom_board *bp) |
1da177e4 LT |
595 | { |
596 | int error; | |
597 | ||
9492e135 | 598 | if (bp->flags & RC_BOARD_ACTIVE) |
1da177e4 | 599 | return 0; |
9492e135 | 600 | |
0f2ed4c6 | 601 | error = request_irq(bp->irq, rc_interrupt, IRQF_DISABLED, |
f07ef395 | 602 | "RISCom/8", bp); |
9492e135 | 603 | if (error) |
1da177e4 | 604 | return error; |
9492e135 | 605 | |
1da177e4 LT |
606 | rc_out(bp, RC_CTOUT, 0); /* Just in case */ |
607 | bp->DTR = ~0; | |
608 | rc_out(bp, RC_DTR, bp->DTR); /* Drop DTR on all ports */ | |
9492e135 | 609 | |
1da177e4 | 610 | bp->flags |= RC_BOARD_ACTIVE; |
9492e135 | 611 | |
1da177e4 LT |
612 | return 0; |
613 | } | |
614 | ||
615 | /* Called with disabled interrupts */ | |
f07ef395 | 616 | static void rc_shutdown_board(struct riscom_board *bp) |
1da177e4 LT |
617 | { |
618 | if (!(bp->flags & RC_BOARD_ACTIVE)) | |
619 | return; | |
9492e135 | 620 | |
1da177e4 | 621 | bp->flags &= ~RC_BOARD_ACTIVE; |
9492e135 | 622 | |
1da177e4 | 623 | free_irq(bp->irq, NULL); |
9492e135 | 624 | |
1da177e4 LT |
625 | bp->DTR = ~0; |
626 | rc_out(bp, RC_DTR, bp->DTR); /* Drop DTR on all ports */ | |
9492e135 | 627 | |
1da177e4 LT |
628 | } |
629 | ||
630 | /* | |
9492e135 | 631 | * Setting up port characteristics. |
1da177e4 LT |
632 | * Must be called with disabled interrupts |
633 | */ | |
634 | static void rc_change_speed(struct riscom_board *bp, struct riscom_port *port) | |
635 | { | |
85f8f810 | 636 | struct tty_struct *tty = port->port.tty; |
1da177e4 LT |
637 | unsigned long baud; |
638 | long tmp; | |
639 | unsigned char cor1 = 0, cor3 = 0; | |
640 | unsigned char mcor1 = 0, mcor2 = 0; | |
9492e135 | 641 | |
1da177e4 LT |
642 | port->IER = 0; |
643 | port->COR2 = 0; | |
644 | port->MSVR = MSVR_RTS; | |
9492e135 | 645 | |
c7bce309 | 646 | baud = tty_get_baud_rate(tty); |
9492e135 | 647 | |
1da177e4 LT |
648 | /* Select port on the board */ |
649 | rc_out(bp, CD180_CAR, port_No(port)); | |
9492e135 | 650 | |
c7bce309 | 651 | if (!baud) { |
1da177e4 LT |
652 | /* Drop DTR & exit */ |
653 | bp->DTR |= (1u << port_No(port)); | |
654 | rc_out(bp, RC_DTR, bp->DTR); | |
655 | return; | |
656 | } else { | |
657 | /* Set DTR on */ | |
658 | bp->DTR &= ~(1u << port_No(port)); | |
659 | rc_out(bp, RC_DTR, bp->DTR); | |
660 | } | |
9492e135 | 661 | |
1da177e4 | 662 | /* |
9492e135 | 663 | * Now we must calculate some speed depended things |
1da177e4 | 664 | */ |
9492e135 | 665 | |
1da177e4 | 666 | /* Set baud rate for port */ |
c7bce309 | 667 | tmp = (((RC_OSCFREQ + baud/2) / baud + |
1da177e4 LT |
668 | CD180_TPC/2) / CD180_TPC); |
669 | ||
9492e135 AC |
670 | rc_out(bp, CD180_RBPRH, (tmp >> 8) & 0xff); |
671 | rc_out(bp, CD180_TBPRH, (tmp >> 8) & 0xff); | |
672 | rc_out(bp, CD180_RBPRL, tmp & 0xff); | |
1da177e4 | 673 | rc_out(bp, CD180_TBPRL, tmp & 0xff); |
9492e135 | 674 | |
c7bce309 | 675 | baud = (baud + 5) / 10; /* Estimated CPS */ |
9492e135 | 676 | |
1da177e4 | 677 | /* Two timer ticks seems enough to wakeup something like SLIP driver */ |
9492e135 | 678 | tmp = ((baud + HZ/2) / HZ) * 2 - CD180_NFIFO; |
1da177e4 LT |
679 | port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ? |
680 | SERIAL_XMIT_SIZE - 1 : tmp); | |
9492e135 | 681 | |
1da177e4 LT |
682 | /* Receiver timeout will be transmission time for 1.5 chars */ |
683 | tmp = (RISCOM_TPS + RISCOM_TPS/2 + baud/2) / baud; | |
684 | tmp = (tmp > 0xff) ? 0xff : tmp; | |
685 | rc_out(bp, CD180_RTPR, tmp); | |
9492e135 AC |
686 | |
687 | switch (C_CSIZE(tty)) { | |
688 | case CS5: | |
1da177e4 LT |
689 | cor1 |= COR1_5BITS; |
690 | break; | |
9492e135 | 691 | case CS6: |
1da177e4 LT |
692 | cor1 |= COR1_6BITS; |
693 | break; | |
9492e135 | 694 | case CS7: |
1da177e4 LT |
695 | cor1 |= COR1_7BITS; |
696 | break; | |
9492e135 | 697 | case CS8: |
1da177e4 LT |
698 | cor1 |= COR1_8BITS; |
699 | break; | |
700 | } | |
9492e135 | 701 | if (C_CSTOPB(tty)) |
1da177e4 | 702 | cor1 |= COR1_2SB; |
9492e135 | 703 | |
1da177e4 | 704 | cor1 |= COR1_IGNORE; |
9492e135 | 705 | if (C_PARENB(tty)) { |
1da177e4 | 706 | cor1 |= COR1_NORMPAR; |
9492e135 | 707 | if (C_PARODD(tty)) |
1da177e4 | 708 | cor1 |= COR1_ODDP; |
9492e135 | 709 | if (I_INPCK(tty)) |
1da177e4 LT |
710 | cor1 &= ~COR1_IGNORE; |
711 | } | |
712 | /* Set marking of some errors */ | |
713 | port->mark_mask = RCSR_OE | RCSR_TOUT; | |
9492e135 | 714 | if (I_INPCK(tty)) |
1da177e4 | 715 | port->mark_mask |= RCSR_FE | RCSR_PE; |
9492e135 | 716 | if (I_BRKINT(tty) || I_PARMRK(tty)) |
1da177e4 | 717 | port->mark_mask |= RCSR_BREAK; |
9492e135 | 718 | if (I_IGNPAR(tty)) |
1da177e4 | 719 | port->mark_mask &= ~(RCSR_FE | RCSR_PE); |
9492e135 | 720 | if (I_IGNBRK(tty)) { |
1da177e4 | 721 | port->mark_mask &= ~RCSR_BREAK; |
9492e135 | 722 | if (I_IGNPAR(tty)) |
1da177e4 LT |
723 | /* Real raw mode. Ignore all */ |
724 | port->mark_mask &= ~RCSR_OE; | |
725 | } | |
726 | /* Enable Hardware Flow Control */ | |
727 | if (C_CRTSCTS(tty)) { | |
728 | #ifdef RISCOM_BRAIN_DAMAGED_CTS | |
729 | port->IER |= IER_DSR | IER_CTS; | |
730 | mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD; | |
731 | mcor2 |= MCOR2_DSROD | MCOR2_CTSOD; | |
9492e135 AC |
732 | tty->hw_stopped = !(rc_in(bp, CD180_MSVR) & |
733 | (MSVR_CTS|MSVR_DSR)); | |
1da177e4 LT |
734 | #else |
735 | port->COR2 |= COR2_CTSAE; | |
736 | #endif | |
737 | } | |
738 | /* Enable Software Flow Control. FIXME: I'm not sure about this */ | |
739 | /* Some people reported that it works, but I still doubt */ | |
740 | if (I_IXON(tty)) { | |
741 | port->COR2 |= COR2_TXIBE; | |
742 | cor3 |= (COR3_FCT | COR3_SCDE); | |
743 | if (I_IXANY(tty)) | |
744 | port->COR2 |= COR2_IXM; | |
745 | rc_out(bp, CD180_SCHR1, START_CHAR(tty)); | |
746 | rc_out(bp, CD180_SCHR2, STOP_CHAR(tty)); | |
747 | rc_out(bp, CD180_SCHR3, START_CHAR(tty)); | |
748 | rc_out(bp, CD180_SCHR4, STOP_CHAR(tty)); | |
749 | } | |
750 | if (!C_CLOCAL(tty)) { | |
751 | /* Enable CD check */ | |
752 | port->IER |= IER_CD; | |
753 | mcor1 |= MCOR1_CDZD; | |
754 | mcor2 |= MCOR2_CDOD; | |
755 | } | |
9492e135 AC |
756 | |
757 | if (C_CREAD(tty)) | |
1da177e4 LT |
758 | /* Enable receiver */ |
759 | port->IER |= IER_RXD; | |
9492e135 | 760 | |
1da177e4 | 761 | /* Set input FIFO size (1-8 bytes) */ |
9492e135 | 762 | cor3 |= RISCOM_RXFIFO; |
1da177e4 LT |
763 | /* Setting up CD180 channel registers */ |
764 | rc_out(bp, CD180_COR1, cor1); | |
765 | rc_out(bp, CD180_COR2, port->COR2); | |
766 | rc_out(bp, CD180_COR3, cor3); | |
767 | /* Make CD180 know about registers change */ | |
768 | rc_wait_CCR(bp); | |
769 | rc_out(bp, CD180_CCR, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3); | |
770 | /* Setting up modem option registers */ | |
771 | rc_out(bp, CD180_MCOR1, mcor1); | |
772 | rc_out(bp, CD180_MCOR2, mcor2); | |
773 | /* Enable CD180 transmitter & receiver */ | |
774 | rc_wait_CCR(bp); | |
775 | rc_out(bp, CD180_CCR, CCR_TXEN | CCR_RXEN); | |
776 | /* Enable interrupts */ | |
777 | rc_out(bp, CD180_IER, port->IER); | |
778 | /* And finally set RTS on */ | |
779 | rc_out(bp, CD180_MSVR, port->MSVR); | |
780 | } | |
781 | ||
782 | /* Must be called with interrupts enabled */ | |
783 | static int rc_setup_port(struct riscom_board *bp, struct riscom_port *port) | |
784 | { | |
785 | unsigned long flags; | |
9492e135 | 786 | |
85f8f810 | 787 | if (port->port.flags & ASYNC_INITIALIZED) |
1da177e4 | 788 | return 0; |
9492e135 | 789 | |
85f8f810 AC |
790 | if (tty_port_alloc_xmit_buf(&port->port) < 0) |
791 | return -ENOMEM; | |
792 | ||
d9afa435 JG |
793 | spin_lock_irqsave(&riscom_lock, flags); |
794 | ||
d99101fd | 795 | clear_bit(TTY_IO_ERROR, &port->port.tty->flags); |
85f8f810 | 796 | if (port->port.count == 1) |
1da177e4 | 797 | bp->count++; |
1da177e4 LT |
798 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; |
799 | rc_change_speed(bp, port); | |
85f8f810 | 800 | port->port.flags |= ASYNC_INITIALIZED; |
9492e135 | 801 | |
d9afa435 | 802 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
803 | return 0; |
804 | } | |
805 | ||
806 | /* Must be called with interrupts disabled */ | |
d99101fd AC |
807 | static void rc_shutdown_port(struct tty_struct *tty, |
808 | struct riscom_board *bp, struct riscom_port *port) | |
1da177e4 | 809 | { |
85f8f810 | 810 | if (!(port->port.flags & ASYNC_INITIALIZED)) |
1da177e4 | 811 | return; |
9492e135 | 812 | |
1da177e4 LT |
813 | #ifdef RC_REPORT_OVERRUN |
814 | printk(KERN_INFO "rc%d: port %d: Total %ld overruns were detected.\n", | |
815 | board_No(bp), port_No(port), port->overrun); | |
9492e135 | 816 | #endif |
1da177e4 LT |
817 | #ifdef RC_REPORT_FIFO |
818 | { | |
819 | int i; | |
9492e135 | 820 | |
1da177e4 LT |
821 | printk(KERN_INFO "rc%d: port %d: FIFO hits [ ", |
822 | board_No(bp), port_No(port)); | |
9492e135 | 823 | for (i = 0; i < 10; i++) |
1da177e4 | 824 | printk("%ld ", port->hits[i]); |
1da177e4 LT |
825 | printk("].\n"); |
826 | } | |
9492e135 | 827 | #endif |
85f8f810 | 828 | tty_port_free_xmit_buf(&port->port); |
d99101fd | 829 | if (C_HUPCL(tty)) { |
1da177e4 LT |
830 | /* Drop DTR */ |
831 | bp->DTR |= (1u << port_No(port)); | |
832 | rc_out(bp, RC_DTR, bp->DTR); | |
833 | } | |
9492e135 AC |
834 | |
835 | /* Select port */ | |
1da177e4 LT |
836 | rc_out(bp, CD180_CAR, port_No(port)); |
837 | /* Reset port */ | |
838 | rc_wait_CCR(bp); | |
839 | rc_out(bp, CD180_CCR, CCR_SOFTRESET); | |
840 | /* Disable all interrupts from this port */ | |
841 | port->IER = 0; | |
842 | rc_out(bp, CD180_IER, port->IER); | |
9492e135 | 843 | |
d99101fd | 844 | set_bit(TTY_IO_ERROR, &tty->flags); |
85f8f810 | 845 | port->port.flags &= ~ASYNC_INITIALIZED; |
9492e135 | 846 | |
1da177e4 LT |
847 | if (--bp->count < 0) { |
848 | printk(KERN_INFO "rc%d: rc_shutdown_port: " | |
849 | "bad board count: %d\n", | |
850 | board_No(bp), bp->count); | |
851 | bp->count = 0; | |
852 | } | |
1da177e4 LT |
853 | /* |
854 | * If this is the last opened port on the board | |
855 | * shutdown whole board | |
856 | */ | |
9492e135 | 857 | if (!bp->count) |
1da177e4 LT |
858 | rc_shutdown_board(bp); |
859 | } | |
860 | ||
31f35939 AC |
861 | static int carrier_raised(struct tty_port *port) |
862 | { | |
863 | struct riscom_port *p = container_of(port, struct riscom_port, port); | |
864 | struct riscom_board *bp = port_Board(p); | |
865 | unsigned long flags; | |
866 | int CD; | |
867 | ||
868 | spin_lock_irqsave(&riscom_lock, flags); | |
869 | rc_out(bp, CD180_CAR, port_No(p)); | |
870 | CD = rc_in(bp, CD180_MSVR) & MSVR_CD; | |
871 | rc_out(bp, CD180_MSVR, MSVR_RTS); | |
872 | bp->DTR &= ~(1u << port_No(p)); | |
873 | rc_out(bp, RC_DTR, bp->DTR); | |
874 | spin_unlock_irqrestore(&riscom_lock, flags); | |
875 | return CD; | |
876 | } | |
877 | ||
9492e135 | 878 | static int rc_open(struct tty_struct *tty, struct file *filp) |
1da177e4 LT |
879 | { |
880 | int board; | |
881 | int error; | |
9492e135 AC |
882 | struct riscom_port *port; |
883 | struct riscom_board *bp; | |
884 | ||
1da177e4 LT |
885 | board = RC_BOARD(tty->index); |
886 | if (board >= RC_NBOARD || !(rc_board[board].flags & RC_BOARD_PRESENT)) | |
887 | return -ENODEV; | |
9492e135 | 888 | |
1da177e4 LT |
889 | bp = &rc_board[board]; |
890 | port = rc_port + board * RC_NPORT + RC_PORT(tty->index); | |
891 | if (rc_paranoia_check(port, tty->name, "rc_open")) | |
892 | return -ENODEV; | |
9492e135 AC |
893 | |
894 | error = rc_setup_board(bp); | |
895 | if (error) | |
1da177e4 | 896 | return error; |
9492e135 | 897 | |
85f8f810 | 898 | port->port.count++; |
1da177e4 | 899 | tty->driver_data = port; |
85f8f810 | 900 | port->port.tty = tty; |
9492e135 AC |
901 | |
902 | error = rc_setup_port(bp, port); | |
903 | if (error == 0) | |
36c621d8 | 904 | error = tty_port_block_til_ready(&port->port, tty, filp); |
9492e135 | 905 | return error; |
1da177e4 LT |
906 | } |
907 | ||
978e595f AC |
908 | static void rc_flush_buffer(struct tty_struct *tty) |
909 | { | |
c9f19e96 | 910 | struct riscom_port *port = tty->driver_data; |
978e595f AC |
911 | unsigned long flags; |
912 | ||
913 | if (rc_paranoia_check(port, tty->name, "rc_flush_buffer")) | |
914 | return; | |
915 | ||
916 | spin_lock_irqsave(&riscom_lock, flags); | |
978e595f | 917 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; |
978e595f AC |
918 | spin_unlock_irqrestore(&riscom_lock, flags); |
919 | ||
920 | tty_wakeup(tty); | |
921 | } | |
922 | ||
9492e135 | 923 | static void rc_close(struct tty_struct *tty, struct file *filp) |
1da177e4 | 924 | { |
c9f19e96 | 925 | struct riscom_port *port = tty->driver_data; |
1da177e4 LT |
926 | struct riscom_board *bp; |
927 | unsigned long flags; | |
928 | unsigned long timeout; | |
9492e135 | 929 | |
1da177e4 LT |
930 | if (!port || rc_paranoia_check(port, tty->name, "close")) |
931 | return; | |
d9afa435 | 932 | |
1da177e4 | 933 | bp = port_Board(port); |
a6614999 AC |
934 | |
935 | if (tty_port_close_start(&port->port, tty, filp) == 0) | |
936 | return; | |
937 | ||
1da177e4 LT |
938 | /* |
939 | * At this point we stop accepting input. To do this, we | |
940 | * disable the receive line status interrupts, and tell the | |
941 | * interrupt driver to stop checking the data ready bit in the | |
942 | * line status register. | |
943 | */ | |
c2ba38cd AC |
944 | |
945 | spin_lock_irqsave(&riscom_lock, flags); | |
1da177e4 | 946 | port->IER &= ~IER_RXD; |
85f8f810 | 947 | if (port->port.flags & ASYNC_INITIALIZED) { |
1da177e4 LT |
948 | port->IER &= ~IER_TXRDY; |
949 | port->IER |= IER_TXEMPTY; | |
950 | rc_out(bp, CD180_CAR, port_No(port)); | |
951 | rc_out(bp, CD180_IER, port->IER); | |
952 | /* | |
953 | * Before we drop DTR, make sure the UART transmitter | |
954 | * has completely drained; this is especially | |
955 | * important if there is a transmit FIFO! | |
956 | */ | |
9492e135 AC |
957 | timeout = jiffies + HZ; |
958 | while (port->IER & IER_TXEMPTY) { | |
c2ba38cd | 959 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 | 960 | msleep_interruptible(jiffies_to_msecs(port->timeout)); |
c2ba38cd | 961 | spin_lock_irqsave(&riscom_lock, flags); |
1da177e4 LT |
962 | if (time_after(jiffies, timeout)) |
963 | break; | |
964 | } | |
965 | } | |
d99101fd | 966 | rc_shutdown_port(tty, bp, port); |
978e595f | 967 | rc_flush_buffer(tty); |
c2ba38cd | 968 | spin_unlock_irqrestore(&riscom_lock, flags); |
d9afa435 | 969 | |
a6614999 | 970 | tty_port_close_end(&port->port, tty); |
1da177e4 LT |
971 | } |
972 | ||
9492e135 | 973 | static int rc_write(struct tty_struct *tty, |
1da177e4 LT |
974 | const unsigned char *buf, int count) |
975 | { | |
c9f19e96 | 976 | struct riscom_port *port = tty->driver_data; |
1da177e4 LT |
977 | struct riscom_board *bp; |
978 | int c, total = 0; | |
979 | unsigned long flags; | |
9492e135 | 980 | |
1da177e4 LT |
981 | if (rc_paranoia_check(port, tty->name, "rc_write")) |
982 | return 0; | |
9492e135 | 983 | |
1da177e4 LT |
984 | bp = port_Board(port); |
985 | ||
1da177e4 | 986 | while (1) { |
d9afa435 JG |
987 | spin_lock_irqsave(&riscom_lock, flags); |
988 | ||
1da177e4 LT |
989 | c = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1, |
990 | SERIAL_XMIT_SIZE - port->xmit_head)); | |
d9afa435 JG |
991 | if (c <= 0) |
992 | break; /* lock continues to be held */ | |
1da177e4 | 993 | |
85f8f810 | 994 | memcpy(port->port.xmit_buf + port->xmit_head, buf, c); |
1da177e4 LT |
995 | port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1); |
996 | port->xmit_cnt += c; | |
d9afa435 JG |
997 | |
998 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
999 | |
1000 | buf += c; | |
1001 | count -= c; | |
1002 | total += c; | |
1003 | } | |
1004 | ||
1da177e4 LT |
1005 | if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped && |
1006 | !(port->IER & IER_TXRDY)) { | |
1007 | port->IER |= IER_TXRDY; | |
1008 | rc_out(bp, CD180_CAR, port_No(port)); | |
1009 | rc_out(bp, CD180_IER, port->IER); | |
1010 | } | |
d9afa435 JG |
1011 | |
1012 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
1013 | |
1014 | return total; | |
1015 | } | |
1016 | ||
9492e135 | 1017 | static int rc_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 | 1018 | { |
c9f19e96 | 1019 | struct riscom_port *port = tty->driver_data; |
1da177e4 | 1020 | unsigned long flags; |
bbbbb96f | 1021 | int ret = 0; |
1da177e4 LT |
1022 | |
1023 | if (rc_paranoia_check(port, tty->name, "rc_put_char")) | |
bbbbb96f | 1024 | return 0; |
1da177e4 | 1025 | |
d9afa435 | 1026 | spin_lock_irqsave(&riscom_lock, flags); |
9492e135 | 1027 | |
1da177e4 LT |
1028 | if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) |
1029 | goto out; | |
1030 | ||
85f8f810 | 1031 | port->port.xmit_buf[port->xmit_head++] = ch; |
1da177e4 LT |
1032 | port->xmit_head &= SERIAL_XMIT_SIZE - 1; |
1033 | port->xmit_cnt++; | |
bbbbb96f | 1034 | ret = 1; |
d9afa435 JG |
1035 | |
1036 | out: | |
1037 | spin_unlock_irqrestore(&riscom_lock, flags); | |
bbbbb96f | 1038 | return ret; |
1da177e4 LT |
1039 | } |
1040 | ||
9492e135 | 1041 | static void rc_flush_chars(struct tty_struct *tty) |
1da177e4 | 1042 | { |
c9f19e96 | 1043 | struct riscom_port *port = tty->driver_data; |
1da177e4 | 1044 | unsigned long flags; |
9492e135 | 1045 | |
1da177e4 LT |
1046 | if (rc_paranoia_check(port, tty->name, "rc_flush_chars")) |
1047 | return; | |
9492e135 | 1048 | |
d99101fd | 1049 | if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped) |
1da177e4 LT |
1050 | return; |
1051 | ||
d9afa435 JG |
1052 | spin_lock_irqsave(&riscom_lock, flags); |
1053 | ||
1da177e4 LT |
1054 | port->IER |= IER_TXRDY; |
1055 | rc_out(port_Board(port), CD180_CAR, port_No(port)); | |
1056 | rc_out(port_Board(port), CD180_IER, port->IER); | |
d9afa435 JG |
1057 | |
1058 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
1059 | } |
1060 | ||
9492e135 | 1061 | static int rc_write_room(struct tty_struct *tty) |
1da177e4 | 1062 | { |
c9f19e96 | 1063 | struct riscom_port *port = tty->driver_data; |
1da177e4 | 1064 | int ret; |
9492e135 | 1065 | |
1da177e4 LT |
1066 | if (rc_paranoia_check(port, tty->name, "rc_write_room")) |
1067 | return 0; | |
1068 | ||
1069 | ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; | |
1070 | if (ret < 0) | |
1071 | ret = 0; | |
1072 | return ret; | |
1073 | } | |
1074 | ||
1075 | static int rc_chars_in_buffer(struct tty_struct *tty) | |
1076 | { | |
c9f19e96 | 1077 | struct riscom_port *port = tty->driver_data; |
9492e135 | 1078 | |
1da177e4 LT |
1079 | if (rc_paranoia_check(port, tty->name, "rc_chars_in_buffer")) |
1080 | return 0; | |
9492e135 | 1081 | |
1da177e4 LT |
1082 | return port->xmit_cnt; |
1083 | } | |
1084 | ||
1da177e4 LT |
1085 | static int rc_tiocmget(struct tty_struct *tty, struct file *file) |
1086 | { | |
c9f19e96 | 1087 | struct riscom_port *port = tty->driver_data; |
9492e135 | 1088 | struct riscom_board *bp; |
1da177e4 LT |
1089 | unsigned char status; |
1090 | unsigned int result; | |
1091 | unsigned long flags; | |
1092 | ||
bf9d8929 | 1093 | if (rc_paranoia_check(port, tty->name, __func__)) |
1da177e4 LT |
1094 | return -ENODEV; |
1095 | ||
1096 | bp = port_Board(port); | |
d9afa435 JG |
1097 | |
1098 | spin_lock_irqsave(&riscom_lock, flags); | |
1099 | ||
1da177e4 LT |
1100 | rc_out(bp, CD180_CAR, port_No(port)); |
1101 | status = rc_in(bp, CD180_MSVR); | |
1102 | result = rc_in(bp, RC_RI) & (1u << port_No(port)) ? 0 : TIOCM_RNG; | |
d9afa435 JG |
1103 | |
1104 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1105 | ||
1da177e4 LT |
1106 | result |= ((status & MSVR_RTS) ? TIOCM_RTS : 0) |
1107 | | ((status & MSVR_DTR) ? TIOCM_DTR : 0) | |
1108 | | ((status & MSVR_CD) ? TIOCM_CAR : 0) | |
1109 | | ((status & MSVR_DSR) ? TIOCM_DSR : 0) | |
1110 | | ((status & MSVR_CTS) ? TIOCM_CTS : 0); | |
1111 | return result; | |
1112 | } | |
1113 | ||
1114 | static int rc_tiocmset(struct tty_struct *tty, struct file *file, | |
1115 | unsigned int set, unsigned int clear) | |
1116 | { | |
c9f19e96 | 1117 | struct riscom_port *port = tty->driver_data; |
1da177e4 LT |
1118 | unsigned long flags; |
1119 | struct riscom_board *bp; | |
1120 | ||
bf9d8929 | 1121 | if (rc_paranoia_check(port, tty->name, __func__)) |
1da177e4 LT |
1122 | return -ENODEV; |
1123 | ||
1124 | bp = port_Board(port); | |
1125 | ||
d9afa435 JG |
1126 | spin_lock_irqsave(&riscom_lock, flags); |
1127 | ||
1da177e4 LT |
1128 | if (set & TIOCM_RTS) |
1129 | port->MSVR |= MSVR_RTS; | |
1130 | if (set & TIOCM_DTR) | |
1131 | bp->DTR &= ~(1u << port_No(port)); | |
1132 | ||
1133 | if (clear & TIOCM_RTS) | |
1134 | port->MSVR &= ~MSVR_RTS; | |
1135 | if (clear & TIOCM_DTR) | |
1136 | bp->DTR |= (1u << port_No(port)); | |
1137 | ||
1138 | rc_out(bp, CD180_CAR, port_No(port)); | |
1139 | rc_out(bp, CD180_MSVR, port->MSVR); | |
1140 | rc_out(bp, RC_DTR, bp->DTR); | |
d9afa435 JG |
1141 | |
1142 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1143 | ||
1da177e4 LT |
1144 | return 0; |
1145 | } | |
1146 | ||
781cff5c | 1147 | static int rc_send_break(struct tty_struct *tty, int length) |
1da177e4 | 1148 | { |
c9f19e96 | 1149 | struct riscom_port *port = tty->driver_data; |
1da177e4 LT |
1150 | struct riscom_board *bp = port_Board(port); |
1151 | unsigned long flags; | |
9492e135 | 1152 | |
781cff5c AC |
1153 | if (length == 0 || length == -1) |
1154 | return -EOPNOTSUPP; | |
1155 | ||
d9afa435 JG |
1156 | spin_lock_irqsave(&riscom_lock, flags); |
1157 | ||
1da177e4 LT |
1158 | port->break_length = RISCOM_TPS / HZ * length; |
1159 | port->COR2 |= COR2_ETC; | |
1160 | port->IER |= IER_TXRDY; | |
1161 | rc_out(bp, CD180_CAR, port_No(port)); | |
1162 | rc_out(bp, CD180_COR2, port->COR2); | |
1163 | rc_out(bp, CD180_IER, port->IER); | |
1164 | rc_wait_CCR(bp); | |
1165 | rc_out(bp, CD180_CCR, CCR_CORCHG2); | |
1166 | rc_wait_CCR(bp); | |
d9afa435 JG |
1167 | |
1168 | spin_unlock_irqrestore(&riscom_lock, flags); | |
781cff5c | 1169 | return 0; |
1da177e4 LT |
1170 | } |
1171 | ||
9492e135 AC |
1172 | static int rc_set_serial_info(struct riscom_port *port, |
1173 | struct serial_struct __user *newinfo) | |
1da177e4 LT |
1174 | { |
1175 | struct serial_struct tmp; | |
1176 | struct riscom_board *bp = port_Board(port); | |
1177 | int change_speed; | |
9492e135 | 1178 | |
1da177e4 LT |
1179 | if (copy_from_user(&tmp, newinfo, sizeof(tmp))) |
1180 | return -EFAULT; | |
9492e135 AC |
1181 | |
1182 | #if 0 | |
1da177e4 LT |
1183 | if ((tmp.irq != bp->irq) || |
1184 | (tmp.port != bp->base) || | |
1185 | (tmp.type != PORT_CIRRUS) || | |
1186 | (tmp.baud_base != (RC_OSCFREQ + CD180_TPC/2) / CD180_TPC) || | |
1187 | (tmp.custom_divisor != 0) || | |
1188 | (tmp.xmit_fifo_size != CD180_NFIFO) || | |
1189 | (tmp.flags & ~RISCOM_LEGAL_FLAGS)) | |
1190 | return -EINVAL; | |
9492e135 AC |
1191 | #endif |
1192 | ||
85f8f810 | 1193 | change_speed = ((port->port.flags & ASYNC_SPD_MASK) != |
1da177e4 | 1194 | (tmp.flags & ASYNC_SPD_MASK)); |
9492e135 | 1195 | |
1da177e4 | 1196 | if (!capable(CAP_SYS_ADMIN)) { |
44b7d1b3 AC |
1197 | if ((tmp.close_delay != port->port.close_delay) || |
1198 | (tmp.closing_wait != port->port.closing_wait) || | |
1da177e4 | 1199 | ((tmp.flags & ~ASYNC_USR_MASK) != |
85f8f810 | 1200 | (port->port.flags & ~ASYNC_USR_MASK))) |
1da177e4 | 1201 | return -EPERM; |
85f8f810 | 1202 | port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) | |
1da177e4 LT |
1203 | (tmp.flags & ASYNC_USR_MASK)); |
1204 | } else { | |
85f8f810 | 1205 | port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) | |
1da177e4 | 1206 | (tmp.flags & ASYNC_FLAGS)); |
44b7d1b3 AC |
1207 | port->port.close_delay = tmp.close_delay; |
1208 | port->port.closing_wait = tmp.closing_wait; | |
1da177e4 LT |
1209 | } |
1210 | if (change_speed) { | |
d9afa435 JG |
1211 | unsigned long flags; |
1212 | ||
1213 | spin_lock_irqsave(&riscom_lock, flags); | |
1da177e4 | 1214 | rc_change_speed(bp, port); |
d9afa435 | 1215 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1216 | } |
1217 | return 0; | |
1218 | } | |
1219 | ||
9492e135 | 1220 | static int rc_get_serial_info(struct riscom_port *port, |
1da177e4 LT |
1221 | struct serial_struct __user *retinfo) |
1222 | { | |
1223 | struct serial_struct tmp; | |
1224 | struct riscom_board *bp = port_Board(port); | |
9492e135 | 1225 | |
1da177e4 LT |
1226 | memset(&tmp, 0, sizeof(tmp)); |
1227 | tmp.type = PORT_CIRRUS; | |
1228 | tmp.line = port - rc_port; | |
1229 | tmp.port = bp->base; | |
1230 | tmp.irq = bp->irq; | |
85f8f810 | 1231 | tmp.flags = port->port.flags; |
1da177e4 | 1232 | tmp.baud_base = (RC_OSCFREQ + CD180_TPC/2) / CD180_TPC; |
44b7d1b3 AC |
1233 | tmp.close_delay = port->port.close_delay * HZ/100; |
1234 | tmp.closing_wait = port->port.closing_wait * HZ/100; | |
1da177e4 LT |
1235 | tmp.xmit_fifo_size = CD180_NFIFO; |
1236 | return copy_to_user(retinfo, &tmp, sizeof(tmp)) ? -EFAULT : 0; | |
1237 | } | |
1238 | ||
9492e135 | 1239 | static int rc_ioctl(struct tty_struct *tty, struct file *filp, |
1da177e4 | 1240 | unsigned int cmd, unsigned long arg) |
1da177e4 | 1241 | { |
c9f19e96 | 1242 | struct riscom_port *port = tty->driver_data; |
1da177e4 | 1243 | void __user *argp = (void __user *)arg; |
781cff5c | 1244 | int retval; |
9492e135 | 1245 | |
1da177e4 LT |
1246 | if (rc_paranoia_check(port, tty->name, "rc_ioctl")) |
1247 | return -ENODEV; | |
9492e135 | 1248 | |
1da177e4 | 1249 | switch (cmd) { |
9492e135 AC |
1250 | case TIOCGSERIAL: |
1251 | lock_kernel(); | |
eb174552 AC |
1252 | retval = rc_get_serial_info(port, argp); |
1253 | unlock_kernel(); | |
1da177e4 | 1254 | break; |
9492e135 AC |
1255 | case TIOCSSERIAL: |
1256 | lock_kernel(); | |
eb174552 AC |
1257 | retval = rc_set_serial_info(port, argp); |
1258 | unlock_kernel(); | |
1259 | break; | |
9492e135 | 1260 | default: |
eb174552 | 1261 | retval = -ENOIOCTLCMD; |
1da177e4 | 1262 | } |
eb174552 | 1263 | return retval; |
1da177e4 LT |
1264 | } |
1265 | ||
9492e135 | 1266 | static void rc_throttle(struct tty_struct *tty) |
1da177e4 | 1267 | { |
c9f19e96 | 1268 | struct riscom_port *port = tty->driver_data; |
1da177e4 LT |
1269 | struct riscom_board *bp; |
1270 | unsigned long flags; | |
9492e135 | 1271 | |
1da177e4 LT |
1272 | if (rc_paranoia_check(port, tty->name, "rc_throttle")) |
1273 | return; | |
1da177e4 | 1274 | bp = port_Board(port); |
d9afa435 JG |
1275 | |
1276 | spin_lock_irqsave(&riscom_lock, flags); | |
1da177e4 LT |
1277 | port->MSVR &= ~MSVR_RTS; |
1278 | rc_out(bp, CD180_CAR, port_No(port)); | |
d9afa435 | 1279 | if (I_IXOFF(tty)) { |
1da177e4 LT |
1280 | rc_wait_CCR(bp); |
1281 | rc_out(bp, CD180_CCR, CCR_SSCH2); | |
1282 | rc_wait_CCR(bp); | |
1283 | } | |
1284 | rc_out(bp, CD180_MSVR, port->MSVR); | |
d9afa435 | 1285 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1286 | } |
1287 | ||
9492e135 | 1288 | static void rc_unthrottle(struct tty_struct *tty) |
1da177e4 | 1289 | { |
c9f19e96 | 1290 | struct riscom_port *port = tty->driver_data; |
1da177e4 LT |
1291 | struct riscom_board *bp; |
1292 | unsigned long flags; | |
9492e135 | 1293 | |
1da177e4 LT |
1294 | if (rc_paranoia_check(port, tty->name, "rc_unthrottle")) |
1295 | return; | |
1da177e4 | 1296 | bp = port_Board(port); |
d9afa435 | 1297 | |
9492e135 | 1298 | spin_lock_irqsave(&riscom_lock, flags); |
1da177e4 LT |
1299 | port->MSVR |= MSVR_RTS; |
1300 | rc_out(bp, CD180_CAR, port_No(port)); | |
1301 | if (I_IXOFF(tty)) { | |
1302 | rc_wait_CCR(bp); | |
1303 | rc_out(bp, CD180_CCR, CCR_SSCH1); | |
1304 | rc_wait_CCR(bp); | |
1305 | } | |
1306 | rc_out(bp, CD180_MSVR, port->MSVR); | |
d9afa435 | 1307 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1308 | } |
1309 | ||
9492e135 | 1310 | static void rc_stop(struct tty_struct *tty) |
1da177e4 | 1311 | { |
c9f19e96 | 1312 | struct riscom_port *port = tty->driver_data; |
1da177e4 LT |
1313 | struct riscom_board *bp; |
1314 | unsigned long flags; | |
9492e135 | 1315 | |
1da177e4 LT |
1316 | if (rc_paranoia_check(port, tty->name, "rc_stop")) |
1317 | return; | |
9492e135 | 1318 | |
1da177e4 | 1319 | bp = port_Board(port); |
d9afa435 | 1320 | |
9492e135 | 1321 | spin_lock_irqsave(&riscom_lock, flags); |
1da177e4 LT |
1322 | port->IER &= ~IER_TXRDY; |
1323 | rc_out(bp, CD180_CAR, port_No(port)); | |
1324 | rc_out(bp, CD180_IER, port->IER); | |
d9afa435 | 1325 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1326 | } |
1327 | ||
9492e135 | 1328 | static void rc_start(struct tty_struct *tty) |
1da177e4 | 1329 | { |
c9f19e96 | 1330 | struct riscom_port *port = tty->driver_data; |
1da177e4 LT |
1331 | struct riscom_board *bp; |
1332 | unsigned long flags; | |
9492e135 | 1333 | |
1da177e4 LT |
1334 | if (rc_paranoia_check(port, tty->name, "rc_start")) |
1335 | return; | |
9492e135 | 1336 | |
1da177e4 | 1337 | bp = port_Board(port); |
9492e135 | 1338 | |
d9afa435 JG |
1339 | spin_lock_irqsave(&riscom_lock, flags); |
1340 | ||
85f8f810 | 1341 | if (port->xmit_cnt && port->port.xmit_buf && !(port->IER & IER_TXRDY)) { |
1da177e4 LT |
1342 | port->IER |= IER_TXRDY; |
1343 | rc_out(bp, CD180_CAR, port_No(port)); | |
1344 | rc_out(bp, CD180_IER, port->IER); | |
1345 | } | |
d9afa435 | 1346 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1347 | } |
1348 | ||
9492e135 | 1349 | static void rc_hangup(struct tty_struct *tty) |
1da177e4 | 1350 | { |
c9f19e96 | 1351 | struct riscom_port *port = tty->driver_data; |
1da177e4 | 1352 | struct riscom_board *bp; |
c2ba38cd | 1353 | unsigned long flags; |
9492e135 | 1354 | |
1da177e4 LT |
1355 | if (rc_paranoia_check(port, tty->name, "rc_hangup")) |
1356 | return; | |
9492e135 | 1357 | |
1da177e4 | 1358 | bp = port_Board(port); |
9492e135 | 1359 | |
d99101fd | 1360 | rc_shutdown_port(tty, bp, port); |
c2ba38cd | 1361 | spin_lock_irqsave(&port->port.lock, flags); |
85f8f810 AC |
1362 | port->port.count = 0; |
1363 | port->port.flags &= ~ASYNC_NORMAL_ACTIVE; | |
1364 | port->port.tty = NULL; | |
1365 | wake_up_interruptible(&port->port.open_wait); | |
c2ba38cd | 1366 | spin_unlock_irqrestore(&port->port.lock, flags); |
1da177e4 LT |
1367 | } |
1368 | ||
9492e135 AC |
1369 | static void rc_set_termios(struct tty_struct *tty, |
1370 | struct ktermios *old_termios) | |
1da177e4 | 1371 | { |
c9f19e96 | 1372 | struct riscom_port *port = tty->driver_data; |
1da177e4 | 1373 | unsigned long flags; |
9492e135 | 1374 | |
1da177e4 LT |
1375 | if (rc_paranoia_check(port, tty->name, "rc_set_termios")) |
1376 | return; | |
1da177e4 | 1377 | |
d9afa435 | 1378 | spin_lock_irqsave(&riscom_lock, flags); |
1da177e4 | 1379 | rc_change_speed(port_Board(port), port); |
d9afa435 | 1380 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1381 | |
1382 | if ((old_termios->c_cflag & CRTSCTS) && | |
1383 | !(tty->termios->c_cflag & CRTSCTS)) { | |
1384 | tty->hw_stopped = 0; | |
1385 | rc_start(tty); | |
1386 | } | |
1387 | } | |
1388 | ||
b68e31d0 | 1389 | static const struct tty_operations riscom_ops = { |
1da177e4 LT |
1390 | .open = rc_open, |
1391 | .close = rc_close, | |
1392 | .write = rc_write, | |
1393 | .put_char = rc_put_char, | |
1394 | .flush_chars = rc_flush_chars, | |
1395 | .write_room = rc_write_room, | |
1396 | .chars_in_buffer = rc_chars_in_buffer, | |
1397 | .flush_buffer = rc_flush_buffer, | |
1398 | .ioctl = rc_ioctl, | |
1399 | .throttle = rc_throttle, | |
1400 | .unthrottle = rc_unthrottle, | |
1401 | .set_termios = rc_set_termios, | |
1402 | .stop = rc_stop, | |
1403 | .start = rc_start, | |
1404 | .hangup = rc_hangup, | |
1405 | .tiocmget = rc_tiocmget, | |
1406 | .tiocmset = rc_tiocmset, | |
781cff5c | 1407 | .break_ctl = rc_send_break, |
1da177e4 LT |
1408 | }; |
1409 | ||
31f35939 AC |
1410 | static const struct tty_port_operations riscom_port_ops = { |
1411 | .carrier_raised = carrier_raised, | |
1412 | }; | |
1413 | ||
1414 | ||
1386a820 | 1415 | static int __init rc_init_drivers(void) |
1da177e4 LT |
1416 | { |
1417 | int error; | |
1418 | int i; | |
1419 | ||
1420 | riscom_driver = alloc_tty_driver(RC_NBOARD * RC_NPORT); | |
9492e135 | 1421 | if (!riscom_driver) |
1da177e4 | 1422 | return -ENOMEM; |
9492e135 | 1423 | |
1da177e4 LT |
1424 | riscom_driver->owner = THIS_MODULE; |
1425 | riscom_driver->name = "ttyL"; | |
1da177e4 LT |
1426 | riscom_driver->major = RISCOM8_NORMAL_MAJOR; |
1427 | riscom_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1428 | riscom_driver->subtype = SERIAL_TYPE_NORMAL; | |
1429 | riscom_driver->init_termios = tty_std_termios; | |
1430 | riscom_driver->init_termios.c_cflag = | |
1431 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
606d099c AC |
1432 | riscom_driver->init_termios.c_ispeed = 9600; |
1433 | riscom_driver->init_termios.c_ospeed = 9600; | |
781cff5c | 1434 | riscom_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_HARDWARE_BREAK; |
1da177e4 | 1435 | tty_set_operations(riscom_driver, &riscom_ops); |
9492e135 AC |
1436 | error = tty_register_driver(riscom_driver); |
1437 | if (error != 0) { | |
1da177e4 LT |
1438 | put_tty_driver(riscom_driver); |
1439 | printk(KERN_ERR "rc: Couldn't register RISCom/8 driver, " | |
9492e135 | 1440 | "error = %d\n", error); |
1da177e4 LT |
1441 | return 1; |
1442 | } | |
1da177e4 LT |
1443 | memset(rc_port, 0, sizeof(rc_port)); |
1444 | for (i = 0; i < RC_NPORT * RC_NBOARD; i++) { | |
85f8f810 | 1445 | tty_port_init(&rc_port[i].port); |
31f35939 | 1446 | rc_port[i].port.ops = &riscom_port_ops; |
44b7d1b3 | 1447 | rc_port[i].magic = RISCOM8_MAGIC; |
1da177e4 | 1448 | } |
1da177e4 LT |
1449 | return 0; |
1450 | } | |
1451 | ||
1452 | static void rc_release_drivers(void) | |
1453 | { | |
1da177e4 LT |
1454 | tty_unregister_driver(riscom_driver); |
1455 | put_tty_driver(riscom_driver); | |
1da177e4 LT |
1456 | } |
1457 | ||
1458 | #ifndef MODULE | |
1459 | /* | |
1460 | * Called at boot time. | |
9492e135 | 1461 | * |
1da177e4 LT |
1462 | * You can specify IO base for up to RC_NBOARD cards, |
1463 | * using line "riscom8=0xiobase1,0xiobase2,.." at LILO prompt. | |
1464 | * Note that there will be no probing at default | |
1465 | * addresses in this case. | |
1466 | * | |
9492e135 | 1467 | */ |
1da177e4 LT |
1468 | static int __init riscom8_setup(char *str) |
1469 | { | |
1470 | int ints[RC_NBOARD]; | |
1471 | int i; | |
1472 | ||
1473 | str = get_options(str, ARRAY_SIZE(ints), ints); | |
1474 | ||
1475 | for (i = 0; i < RC_NBOARD; i++) { | |
1476 | if (i < ints[0]) | |
1477 | rc_board[i].base = ints[i+1]; | |
9492e135 | 1478 | else |
1da177e4 LT |
1479 | rc_board[i].base = 0; |
1480 | } | |
1481 | return 1; | |
1482 | } | |
1483 | ||
1484 | __setup("riscom8=", riscom8_setup); | |
1485 | #endif | |
1486 | ||
1487 | static char banner[] __initdata = | |
1488 | KERN_INFO "rc: SDL RISCom/8 card driver v1.1, (c) D.Gorodchanin " | |
1489 | "1994-1996.\n"; | |
1490 | static char no_boards_msg[] __initdata = | |
1491 | KERN_INFO "rc: No RISCom/8 boards detected.\n"; | |
1492 | ||
9492e135 AC |
1493 | /* |
1494 | * This routine must be called by kernel at boot time | |
1da177e4 LT |
1495 | */ |
1496 | static int __init riscom8_init(void) | |
1497 | { | |
1498 | int i; | |
1499 | int found = 0; | |
1500 | ||
1501 | printk(banner); | |
1502 | ||
9492e135 | 1503 | if (rc_init_drivers()) |
1da177e4 LT |
1504 | return -EIO; |
1505 | ||
9492e135 AC |
1506 | for (i = 0; i < RC_NBOARD; i++) |
1507 | if (rc_board[i].base && !rc_probe(&rc_board[i])) | |
1da177e4 | 1508 | found++; |
1da177e4 LT |
1509 | if (!found) { |
1510 | rc_release_drivers(); | |
1511 | printk(no_boards_msg); | |
1512 | return -EIO; | |
1513 | } | |
1514 | return 0; | |
1515 | } | |
1516 | ||
1517 | #ifdef MODULE | |
1518 | static int iobase; | |
1519 | static int iobase1; | |
1520 | static int iobase2; | |
1521 | static int iobase3; | |
8d3b33f6 RR |
1522 | module_param(iobase, int, 0); |
1523 | module_param(iobase1, int, 0); | |
1524 | module_param(iobase2, int, 0); | |
1525 | module_param(iobase3, int, 0); | |
1da177e4 LT |
1526 | |
1527 | MODULE_LICENSE("GPL"); | |
5c9f5806 | 1528 | MODULE_ALIAS_CHARDEV_MAJOR(RISCOM8_NORMAL_MAJOR); |
1da177e4 LT |
1529 | #endif /* MODULE */ |
1530 | ||
1531 | /* | |
1532 | * You can setup up to 4 boards (current value of RC_NBOARD) | |
1533 | * by specifying "iobase=0xXXX iobase1=0xXXX ..." as insmod parameter. | |
1534 | * | |
1535 | */ | |
9492e135 | 1536 | static int __init riscom8_init_module(void) |
1da177e4 LT |
1537 | { |
1538 | #ifdef MODULE | |
1539 | int i; | |
1540 | ||
1541 | if (iobase || iobase1 || iobase2 || iobase3) { | |
9492e135 | 1542 | for (i = 0; i < RC_NBOARD; i++) |
9efda797 | 1543 | rc_board[i].base = 0; |
1da177e4 LT |
1544 | } |
1545 | ||
1546 | if (iobase) | |
1547 | rc_board[0].base = iobase; | |
1548 | if (iobase1) | |
1549 | rc_board[1].base = iobase1; | |
1550 | if (iobase2) | |
1551 | rc_board[2].base = iobase2; | |
1552 | if (iobase3) | |
1553 | rc_board[3].base = iobase3; | |
1554 | #endif /* MODULE */ | |
1555 | ||
1556 | return riscom8_init(); | |
1557 | } | |
9492e135 AC |
1558 | |
1559 | static void __exit riscom8_exit_module(void) | |
1da177e4 LT |
1560 | { |
1561 | int i; | |
9492e135 | 1562 | |
1da177e4 | 1563 | rc_release_drivers(); |
9492e135 AC |
1564 | for (i = 0; i < RC_NBOARD; i++) |
1565 | if (rc_board[i].flags & RC_BOARD_PRESENT) | |
1da177e4 | 1566 | rc_release_io_range(&rc_board[i]); |
9492e135 | 1567 | |
1da177e4 LT |
1568 | } |
1569 | ||
1570 | module_init(riscom8_init_module); | |
1571 | module_exit(riscom8_exit_module); |