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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 | ||
6ff1ab28 | 345 | tty = tty_port_tty_get(&port->port); |
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) |
6ff1ab28 | 357 | goto out; |
1da177e4 LT |
358 | if (status & RCSR_TOUT) { |
359 | printk(KERN_WARNING "rc%d: port %d: Receiver timeout. " | |
9492e135 | 360 | "Hardware problems ?\n", |
1da177e4 | 361 | board_No(bp), port_No(port)); |
6ff1ab28 | 362 | goto out; |
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; |
6ff1ab28 | 368 | if (tty && (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 | |
6ff1ab28 AC |
382 | if (tty) { |
383 | tty_insert_flip_char(tty, ch, flag); | |
384 | tty_flip_buffer_push(tty); | |
385 | } | |
386 | out: | |
387 | tty_kref_put(tty); | |
1da177e4 LT |
388 | } |
389 | ||
9492e135 | 390 | static void rc_receive(struct riscom_board const *bp) |
1da177e4 LT |
391 | { |
392 | struct riscom_port *port; | |
393 | struct tty_struct *tty; | |
394 | unsigned char count; | |
9492e135 AC |
395 | |
396 | port = rc_get_port(bp, "Receive"); | |
397 | if (port == NULL) | |
1da177e4 | 398 | return; |
9492e135 | 399 | |
6ff1ab28 | 400 | tty = tty_port_tty_get(&port->port); |
9492e135 | 401 | |
1da177e4 | 402 | count = rc_in(bp, CD180_RDCR); |
9492e135 | 403 | |
1da177e4 LT |
404 | #ifdef RC_REPORT_FIFO |
405 | port->hits[count > 8 ? 9 : count]++; | |
9492e135 AC |
406 | #endif |
407 | ||
1da177e4 | 408 | while (count--) { |
6ff1ab28 AC |
409 | u8 ch = rc_in(bp, CD180_RDR); |
410 | if (tty) | |
411 | tty_insert_flip_char(tty, ch, TTY_NORMAL); | |
412 | } | |
413 | if (tty) { | |
414 | tty_flip_buffer_push(tty); | |
415 | tty_kref_put(tty); | |
1da177e4 | 416 | } |
1da177e4 LT |
417 | } |
418 | ||
9492e135 | 419 | static void rc_transmit(struct riscom_board const *bp) |
1da177e4 LT |
420 | { |
421 | struct riscom_port *port; | |
422 | struct tty_struct *tty; | |
423 | unsigned char count; | |
9492e135 AC |
424 | |
425 | port = rc_get_port(bp, "Transmit"); | |
426 | if (port == NULL) | |
1da177e4 | 427 | return; |
9492e135 | 428 | |
6ff1ab28 | 429 | tty = tty_port_tty_get(&port->port); |
9492e135 AC |
430 | |
431 | if (port->IER & IER_TXEMPTY) { | |
1da177e4 LT |
432 | /* FIFO drained */ |
433 | rc_out(bp, CD180_CAR, port_No(port)); | |
434 | port->IER &= ~IER_TXEMPTY; | |
435 | rc_out(bp, CD180_IER, port->IER); | |
6ff1ab28 | 436 | goto out; |
1da177e4 | 437 | } |
9492e135 | 438 | |
1da177e4 | 439 | if ((port->xmit_cnt <= 0 && !port->break_length) |
6ff1ab28 | 440 | || (tty && (tty->stopped || tty->hw_stopped))) { |
1da177e4 LT |
441 | rc_out(bp, CD180_CAR, port_No(port)); |
442 | port->IER &= ~IER_TXRDY; | |
443 | rc_out(bp, CD180_IER, port->IER); | |
6ff1ab28 | 444 | goto out; |
1da177e4 | 445 | } |
9492e135 | 446 | |
1da177e4 LT |
447 | if (port->break_length) { |
448 | if (port->break_length > 0) { | |
449 | if (port->COR2 & COR2_ETC) { | |
450 | rc_out(bp, CD180_TDR, CD180_C_ESC); | |
451 | rc_out(bp, CD180_TDR, CD180_C_SBRK); | |
452 | port->COR2 &= ~COR2_ETC; | |
453 | } | |
454 | count = min_t(int, port->break_length, 0xff); | |
455 | rc_out(bp, CD180_TDR, CD180_C_ESC); | |
456 | rc_out(bp, CD180_TDR, CD180_C_DELAY); | |
457 | rc_out(bp, CD180_TDR, count); | |
9492e135 AC |
458 | port->break_length -= count; |
459 | if (port->break_length == 0) | |
1da177e4 LT |
460 | port->break_length--; |
461 | } else { | |
462 | rc_out(bp, CD180_TDR, CD180_C_ESC); | |
463 | rc_out(bp, CD180_TDR, CD180_C_EBRK); | |
464 | rc_out(bp, CD180_COR2, port->COR2); | |
465 | rc_wait_CCR(bp); | |
466 | rc_out(bp, CD180_CCR, CCR_CORCHG2); | |
467 | port->break_length = 0; | |
468 | } | |
7e63d0c4 | 469 | goto out; |
1da177e4 | 470 | } |
9492e135 | 471 | |
1da177e4 LT |
472 | count = CD180_NFIFO; |
473 | do { | |
85f8f810 | 474 | rc_out(bp, CD180_TDR, port->port.xmit_buf[port->xmit_tail++]); |
1da177e4 LT |
475 | port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1); |
476 | if (--port->xmit_cnt <= 0) | |
477 | break; | |
478 | } while (--count > 0); | |
9492e135 | 479 | |
1da177e4 LT |
480 | if (port->xmit_cnt <= 0) { |
481 | rc_out(bp, CD180_CAR, port_No(port)); | |
482 | port->IER &= ~IER_TXRDY; | |
483 | rc_out(bp, CD180_IER, port->IER); | |
484 | } | |
6ff1ab28 | 485 | if (tty && port->xmit_cnt <= port->wakeup_chars) |
b98e70de | 486 | tty_wakeup(tty); |
6ff1ab28 AC |
487 | out: |
488 | tty_kref_put(tty); | |
1da177e4 LT |
489 | } |
490 | ||
9492e135 | 491 | static void rc_check_modem(struct riscom_board const *bp) |
1da177e4 LT |
492 | { |
493 | struct riscom_port *port; | |
494 | struct tty_struct *tty; | |
495 | unsigned char mcr; | |
9492e135 AC |
496 | |
497 | port = rc_get_port(bp, "Modem"); | |
498 | if (port == NULL) | |
1da177e4 | 499 | return; |
9492e135 | 500 | |
6ff1ab28 | 501 | tty = tty_port_tty_get(&port->port); |
9492e135 | 502 | |
1da177e4 | 503 | mcr = rc_in(bp, CD180_MCR); |
9492e135 AC |
504 | if (mcr & MCR_CDCHG) { |
505 | if (rc_in(bp, CD180_MSVR) & MSVR_CD) | |
85f8f810 | 506 | wake_up_interruptible(&port->port.open_wait); |
6ff1ab28 | 507 | else if (tty) |
b98e70de | 508 | tty_hangup(tty); |
1da177e4 | 509 | } |
9492e135 | 510 | |
1da177e4 LT |
511 | #ifdef RISCOM_BRAIN_DAMAGED_CTS |
512 | if (mcr & MCR_CTSCHG) { | |
513 | if (rc_in(bp, CD180_MSVR) & MSVR_CTS) { | |
1da177e4 | 514 | port->IER |= IER_TXRDY; |
6ff1ab28 AC |
515 | if (tty) { |
516 | tty->hw_stopped = 0; | |
517 | if (port->xmit_cnt <= port->wakeup_chars) | |
518 | tty_wakeup(tty); | |
519 | } | |
1da177e4 | 520 | } else { |
6ff1ab28 AC |
521 | if (tty) |
522 | tty->hw_stopped = 1; | |
1da177e4 LT |
523 | port->IER &= ~IER_TXRDY; |
524 | } | |
525 | rc_out(bp, CD180_IER, port->IER); | |
526 | } | |
527 | if (mcr & MCR_DSRCHG) { | |
528 | if (rc_in(bp, CD180_MSVR) & MSVR_DSR) { | |
1da177e4 | 529 | port->IER |= IER_TXRDY; |
6ff1ab28 AC |
530 | if (tty) { |
531 | tty->hw_stopped = 0; | |
532 | if (port->xmit_cnt <= port->wakeup_chars) | |
533 | tty_wakeup(tty); | |
534 | } | |
1da177e4 | 535 | } else { |
6ff1ab28 AC |
536 | if (tty) |
537 | tty->hw_stopped = 1; | |
1da177e4 LT |
538 | port->IER &= ~IER_TXRDY; |
539 | } | |
540 | rc_out(bp, CD180_IER, port->IER); | |
541 | } | |
542 | #endif /* RISCOM_BRAIN_DAMAGED_CTS */ | |
9492e135 | 543 | |
1da177e4 LT |
544 | /* Clear change bits */ |
545 | rc_out(bp, CD180_MCR, 0); | |
6ff1ab28 | 546 | tty_kref_put(tty); |
1da177e4 LT |
547 | } |
548 | ||
549 | /* The main interrupt processing routine */ | |
9492e135 | 550 | static irqreturn_t rc_interrupt(int dummy, void *dev_id) |
1da177e4 LT |
551 | { |
552 | unsigned char status; | |
553 | unsigned char ack; | |
f07ef395 | 554 | struct riscom_board *bp = dev_id; |
1da177e4 LT |
555 | unsigned long loop = 0; |
556 | int handled = 0; | |
557 | ||
c7bec5ab | 558 | if (!(bp->flags & RC_BOARD_ACTIVE)) |
1da177e4 | 559 | return IRQ_NONE; |
c7bec5ab | 560 | |
1da177e4 LT |
561 | while ((++loop < 16) && ((status = ~(rc_in(bp, RC_BSR))) & |
562 | (RC_BSR_TOUT | RC_BSR_TINT | | |
563 | RC_BSR_MINT | RC_BSR_RINT))) { | |
564 | handled = 1; | |
9492e135 | 565 | if (status & RC_BSR_TOUT) |
1da177e4 LT |
566 | printk(KERN_WARNING "rc%d: Got timeout. Hardware " |
567 | "error?\n", board_No(bp)); | |
1da177e4 LT |
568 | else if (status & RC_BSR_RINT) { |
569 | ack = rc_in(bp, RC_ACK_RINT); | |
1da177e4 LT |
570 | if (ack == (RC_ID | GIVR_IT_RCV)) |
571 | rc_receive(bp); | |
572 | else if (ack == (RC_ID | GIVR_IT_REXC)) | |
573 | rc_receive_exc(bp); | |
574 | else | |
575 | printk(KERN_WARNING "rc%d: Bad receive ack " | |
576 | "0x%02x.\n", | |
577 | board_No(bp), ack); | |
1da177e4 LT |
578 | } else if (status & RC_BSR_TINT) { |
579 | ack = rc_in(bp, RC_ACK_TINT); | |
1da177e4 LT |
580 | if (ack == (RC_ID | GIVR_IT_TX)) |
581 | rc_transmit(bp); | |
582 | else | |
583 | printk(KERN_WARNING "rc%d: Bad transmit ack " | |
584 | "0x%02x.\n", | |
585 | board_No(bp), ack); | |
1da177e4 LT |
586 | } else /* if (status & RC_BSR_MINT) */ { |
587 | ack = rc_in(bp, RC_ACK_MINT); | |
9492e135 | 588 | if (ack == (RC_ID | GIVR_IT_MODEM)) |
1da177e4 LT |
589 | rc_check_modem(bp); |
590 | else | |
591 | printk(KERN_WARNING "rc%d: Bad modem ack " | |
592 | "0x%02x.\n", | |
593 | board_No(bp), ack); | |
9492e135 | 594 | } |
1da177e4 LT |
595 | rc_out(bp, CD180_EOIR, 0); /* Mark end of interrupt */ |
596 | rc_out(bp, RC_CTOUT, 0); /* Clear timeout flag */ | |
597 | } | |
598 | return IRQ_RETVAL(handled); | |
599 | } | |
600 | ||
601 | /* | |
602 | * Routines for open & close processing. | |
603 | */ | |
604 | ||
605 | /* Called with disabled interrupts */ | |
9492e135 | 606 | static int rc_setup_board(struct riscom_board *bp) |
1da177e4 LT |
607 | { |
608 | int error; | |
609 | ||
9492e135 | 610 | if (bp->flags & RC_BOARD_ACTIVE) |
1da177e4 | 611 | return 0; |
9492e135 | 612 | |
0f2ed4c6 | 613 | error = request_irq(bp->irq, rc_interrupt, IRQF_DISABLED, |
f07ef395 | 614 | "RISCom/8", bp); |
9492e135 | 615 | if (error) |
1da177e4 | 616 | return error; |
9492e135 | 617 | |
1da177e4 LT |
618 | rc_out(bp, RC_CTOUT, 0); /* Just in case */ |
619 | bp->DTR = ~0; | |
620 | rc_out(bp, RC_DTR, bp->DTR); /* Drop DTR on all ports */ | |
9492e135 | 621 | |
1da177e4 | 622 | bp->flags |= RC_BOARD_ACTIVE; |
9492e135 | 623 | |
1da177e4 LT |
624 | return 0; |
625 | } | |
626 | ||
627 | /* Called with disabled interrupts */ | |
f07ef395 | 628 | static void rc_shutdown_board(struct riscom_board *bp) |
1da177e4 LT |
629 | { |
630 | if (!(bp->flags & RC_BOARD_ACTIVE)) | |
631 | return; | |
9492e135 | 632 | |
1da177e4 | 633 | bp->flags &= ~RC_BOARD_ACTIVE; |
9492e135 | 634 | |
1da177e4 | 635 | free_irq(bp->irq, NULL); |
9492e135 | 636 | |
1da177e4 LT |
637 | bp->DTR = ~0; |
638 | rc_out(bp, RC_DTR, bp->DTR); /* Drop DTR on all ports */ | |
9492e135 | 639 | |
1da177e4 LT |
640 | } |
641 | ||
642 | /* | |
9492e135 | 643 | * Setting up port characteristics. |
1da177e4 LT |
644 | * Must be called with disabled interrupts |
645 | */ | |
6ff1ab28 AC |
646 | static void rc_change_speed(struct tty_struct *tty, struct riscom_board *bp, |
647 | struct riscom_port *port) | |
1da177e4 | 648 | { |
1da177e4 LT |
649 | unsigned long baud; |
650 | long tmp; | |
651 | unsigned char cor1 = 0, cor3 = 0; | |
652 | unsigned char mcor1 = 0, mcor2 = 0; | |
9492e135 | 653 | |
1da177e4 LT |
654 | port->IER = 0; |
655 | port->COR2 = 0; | |
656 | port->MSVR = MSVR_RTS; | |
9492e135 | 657 | |
c7bce309 | 658 | baud = tty_get_baud_rate(tty); |
9492e135 | 659 | |
1da177e4 LT |
660 | /* Select port on the board */ |
661 | rc_out(bp, CD180_CAR, port_No(port)); | |
9492e135 | 662 | |
c7bce309 | 663 | if (!baud) { |
1da177e4 LT |
664 | /* Drop DTR & exit */ |
665 | bp->DTR |= (1u << port_No(port)); | |
666 | rc_out(bp, RC_DTR, bp->DTR); | |
667 | return; | |
668 | } else { | |
669 | /* Set DTR on */ | |
670 | bp->DTR &= ~(1u << port_No(port)); | |
671 | rc_out(bp, RC_DTR, bp->DTR); | |
672 | } | |
9492e135 | 673 | |
1da177e4 | 674 | /* |
9492e135 | 675 | * Now we must calculate some speed depended things |
1da177e4 | 676 | */ |
9492e135 | 677 | |
1da177e4 | 678 | /* Set baud rate for port */ |
c7bce309 | 679 | tmp = (((RC_OSCFREQ + baud/2) / baud + |
1da177e4 LT |
680 | CD180_TPC/2) / CD180_TPC); |
681 | ||
9492e135 AC |
682 | rc_out(bp, CD180_RBPRH, (tmp >> 8) & 0xff); |
683 | rc_out(bp, CD180_TBPRH, (tmp >> 8) & 0xff); | |
684 | rc_out(bp, CD180_RBPRL, tmp & 0xff); | |
1da177e4 | 685 | rc_out(bp, CD180_TBPRL, tmp & 0xff); |
9492e135 | 686 | |
c7bce309 | 687 | baud = (baud + 5) / 10; /* Estimated CPS */ |
9492e135 | 688 | |
1da177e4 | 689 | /* Two timer ticks seems enough to wakeup something like SLIP driver */ |
9492e135 | 690 | tmp = ((baud + HZ/2) / HZ) * 2 - CD180_NFIFO; |
1da177e4 LT |
691 | port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ? |
692 | SERIAL_XMIT_SIZE - 1 : tmp); | |
9492e135 | 693 | |
1da177e4 LT |
694 | /* Receiver timeout will be transmission time for 1.5 chars */ |
695 | tmp = (RISCOM_TPS + RISCOM_TPS/2 + baud/2) / baud; | |
696 | tmp = (tmp > 0xff) ? 0xff : tmp; | |
697 | rc_out(bp, CD180_RTPR, tmp); | |
9492e135 AC |
698 | |
699 | switch (C_CSIZE(tty)) { | |
700 | case CS5: | |
1da177e4 LT |
701 | cor1 |= COR1_5BITS; |
702 | break; | |
9492e135 | 703 | case CS6: |
1da177e4 LT |
704 | cor1 |= COR1_6BITS; |
705 | break; | |
9492e135 | 706 | case CS7: |
1da177e4 LT |
707 | cor1 |= COR1_7BITS; |
708 | break; | |
9492e135 | 709 | case CS8: |
1da177e4 LT |
710 | cor1 |= COR1_8BITS; |
711 | break; | |
712 | } | |
9492e135 | 713 | if (C_CSTOPB(tty)) |
1da177e4 | 714 | cor1 |= COR1_2SB; |
9492e135 | 715 | |
1da177e4 | 716 | cor1 |= COR1_IGNORE; |
9492e135 | 717 | if (C_PARENB(tty)) { |
1da177e4 | 718 | cor1 |= COR1_NORMPAR; |
9492e135 | 719 | if (C_PARODD(tty)) |
1da177e4 | 720 | cor1 |= COR1_ODDP; |
9492e135 | 721 | if (I_INPCK(tty)) |
1da177e4 LT |
722 | cor1 &= ~COR1_IGNORE; |
723 | } | |
724 | /* Set marking of some errors */ | |
725 | port->mark_mask = RCSR_OE | RCSR_TOUT; | |
9492e135 | 726 | if (I_INPCK(tty)) |
1da177e4 | 727 | port->mark_mask |= RCSR_FE | RCSR_PE; |
9492e135 | 728 | if (I_BRKINT(tty) || I_PARMRK(tty)) |
1da177e4 | 729 | port->mark_mask |= RCSR_BREAK; |
9492e135 | 730 | if (I_IGNPAR(tty)) |
1da177e4 | 731 | port->mark_mask &= ~(RCSR_FE | RCSR_PE); |
9492e135 | 732 | if (I_IGNBRK(tty)) { |
1da177e4 | 733 | port->mark_mask &= ~RCSR_BREAK; |
9492e135 | 734 | if (I_IGNPAR(tty)) |
1da177e4 LT |
735 | /* Real raw mode. Ignore all */ |
736 | port->mark_mask &= ~RCSR_OE; | |
737 | } | |
738 | /* Enable Hardware Flow Control */ | |
739 | if (C_CRTSCTS(tty)) { | |
740 | #ifdef RISCOM_BRAIN_DAMAGED_CTS | |
741 | port->IER |= IER_DSR | IER_CTS; | |
742 | mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD; | |
743 | mcor2 |= MCOR2_DSROD | MCOR2_CTSOD; | |
9492e135 AC |
744 | tty->hw_stopped = !(rc_in(bp, CD180_MSVR) & |
745 | (MSVR_CTS|MSVR_DSR)); | |
1da177e4 LT |
746 | #else |
747 | port->COR2 |= COR2_CTSAE; | |
748 | #endif | |
749 | } | |
750 | /* Enable Software Flow Control. FIXME: I'm not sure about this */ | |
751 | /* Some people reported that it works, but I still doubt */ | |
752 | if (I_IXON(tty)) { | |
753 | port->COR2 |= COR2_TXIBE; | |
754 | cor3 |= (COR3_FCT | COR3_SCDE); | |
755 | if (I_IXANY(tty)) | |
756 | port->COR2 |= COR2_IXM; | |
757 | rc_out(bp, CD180_SCHR1, START_CHAR(tty)); | |
758 | rc_out(bp, CD180_SCHR2, STOP_CHAR(tty)); | |
759 | rc_out(bp, CD180_SCHR3, START_CHAR(tty)); | |
760 | rc_out(bp, CD180_SCHR4, STOP_CHAR(tty)); | |
761 | } | |
762 | if (!C_CLOCAL(tty)) { | |
763 | /* Enable CD check */ | |
764 | port->IER |= IER_CD; | |
765 | mcor1 |= MCOR1_CDZD; | |
766 | mcor2 |= MCOR2_CDOD; | |
767 | } | |
9492e135 AC |
768 | |
769 | if (C_CREAD(tty)) | |
1da177e4 LT |
770 | /* Enable receiver */ |
771 | port->IER |= IER_RXD; | |
9492e135 | 772 | |
1da177e4 | 773 | /* Set input FIFO size (1-8 bytes) */ |
9492e135 | 774 | cor3 |= RISCOM_RXFIFO; |
1da177e4 LT |
775 | /* Setting up CD180 channel registers */ |
776 | rc_out(bp, CD180_COR1, cor1); | |
777 | rc_out(bp, CD180_COR2, port->COR2); | |
778 | rc_out(bp, CD180_COR3, cor3); | |
779 | /* Make CD180 know about registers change */ | |
780 | rc_wait_CCR(bp); | |
781 | rc_out(bp, CD180_CCR, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3); | |
782 | /* Setting up modem option registers */ | |
783 | rc_out(bp, CD180_MCOR1, mcor1); | |
784 | rc_out(bp, CD180_MCOR2, mcor2); | |
785 | /* Enable CD180 transmitter & receiver */ | |
786 | rc_wait_CCR(bp); | |
787 | rc_out(bp, CD180_CCR, CCR_TXEN | CCR_RXEN); | |
788 | /* Enable interrupts */ | |
789 | rc_out(bp, CD180_IER, port->IER); | |
790 | /* And finally set RTS on */ | |
791 | rc_out(bp, CD180_MSVR, port->MSVR); | |
792 | } | |
793 | ||
794 | /* Must be called with interrupts enabled */ | |
8f1e6723 | 795 | static int rc_activate_port(struct tty_port *port, struct tty_struct *tty) |
1da177e4 | 796 | { |
8f1e6723 AC |
797 | struct riscom_port *rp = container_of(port, struct riscom_port, port); |
798 | struct riscom_board *bp = port_Board(rp); | |
1da177e4 | 799 | unsigned long flags; |
9492e135 | 800 | |
8f1e6723 | 801 | if (tty_port_alloc_xmit_buf(port) < 0) |
85f8f810 AC |
802 | return -ENOMEM; |
803 | ||
d9afa435 JG |
804 | spin_lock_irqsave(&riscom_lock, flags); |
805 | ||
6ff1ab28 | 806 | clear_bit(TTY_IO_ERROR, &tty->flags); |
8f1e6723 AC |
807 | bp->count++; |
808 | rp->xmit_cnt = rp->xmit_head = rp->xmit_tail = 0; | |
809 | rc_change_speed(tty, bp, rp); | |
d9afa435 | 810 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
811 | return 0; |
812 | } | |
813 | ||
814 | /* Must be called with interrupts disabled */ | |
d99101fd AC |
815 | static void rc_shutdown_port(struct tty_struct *tty, |
816 | struct riscom_board *bp, struct riscom_port *port) | |
1da177e4 | 817 | { |
1da177e4 LT |
818 | #ifdef RC_REPORT_OVERRUN |
819 | printk(KERN_INFO "rc%d: port %d: Total %ld overruns were detected.\n", | |
820 | board_No(bp), port_No(port), port->overrun); | |
9492e135 | 821 | #endif |
1da177e4 LT |
822 | #ifdef RC_REPORT_FIFO |
823 | { | |
824 | int i; | |
9492e135 | 825 | |
1da177e4 LT |
826 | printk(KERN_INFO "rc%d: port %d: FIFO hits [ ", |
827 | board_No(bp), port_No(port)); | |
9492e135 | 828 | for (i = 0; i < 10; i++) |
1da177e4 | 829 | printk("%ld ", port->hits[i]); |
1da177e4 LT |
830 | printk("].\n"); |
831 | } | |
9492e135 | 832 | #endif |
85f8f810 | 833 | tty_port_free_xmit_buf(&port->port); |
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); |
9492e135 | 845 | |
1da177e4 LT |
846 | if (--bp->count < 0) { |
847 | printk(KERN_INFO "rc%d: rc_shutdown_port: " | |
848 | "bad board count: %d\n", | |
849 | board_No(bp), bp->count); | |
850 | bp->count = 0; | |
851 | } | |
1da177e4 LT |
852 | /* |
853 | * If this is the last opened port on the board | |
854 | * shutdown whole board | |
855 | */ | |
9492e135 | 856 | if (!bp->count) |
1da177e4 LT |
857 | rc_shutdown_board(bp); |
858 | } | |
859 | ||
31f35939 AC |
860 | static int carrier_raised(struct tty_port *port) |
861 | { | |
862 | struct riscom_port *p = container_of(port, struct riscom_port, port); | |
863 | struct riscom_board *bp = port_Board(p); | |
864 | unsigned long flags; | |
865 | int CD; | |
866 | ||
867 | spin_lock_irqsave(&riscom_lock, flags); | |
868 | rc_out(bp, CD180_CAR, port_No(p)); | |
869 | CD = rc_in(bp, CD180_MSVR) & MSVR_CD; | |
870 | rc_out(bp, CD180_MSVR, MSVR_RTS); | |
871 | bp->DTR &= ~(1u << port_No(p)); | |
872 | rc_out(bp, RC_DTR, bp->DTR); | |
873 | spin_unlock_irqrestore(&riscom_lock, flags); | |
874 | return CD; | |
875 | } | |
876 | ||
8f1e6723 AC |
877 | static void dtr_rts(struct tty_port *port, int onoff) |
878 | { | |
879 | struct riscom_port *p = container_of(port, struct riscom_port, port); | |
880 | struct riscom_board *bp = port_Board(p); | |
881 | unsigned long flags; | |
882 | ||
883 | spin_lock_irqsave(&riscom_lock, flags); | |
884 | bp->DTR &= ~(1u << port_No(p)); | |
885 | if (onoff == 0) | |
886 | bp->DTR |= (1u << port_No(p)); | |
887 | rc_out(bp, RC_DTR, bp->DTR); | |
888 | spin_unlock_irqrestore(&riscom_lock, flags); | |
889 | } | |
890 | ||
9492e135 | 891 | static int rc_open(struct tty_struct *tty, struct file *filp) |
1da177e4 LT |
892 | { |
893 | int board; | |
894 | int error; | |
9492e135 AC |
895 | struct riscom_port *port; |
896 | struct riscom_board *bp; | |
897 | ||
1da177e4 LT |
898 | board = RC_BOARD(tty->index); |
899 | if (board >= RC_NBOARD || !(rc_board[board].flags & RC_BOARD_PRESENT)) | |
900 | return -ENODEV; | |
9492e135 | 901 | |
1da177e4 LT |
902 | bp = &rc_board[board]; |
903 | port = rc_port + board * RC_NPORT + RC_PORT(tty->index); | |
904 | if (rc_paranoia_check(port, tty->name, "rc_open")) | |
905 | return -ENODEV; | |
9492e135 AC |
906 | |
907 | error = rc_setup_board(bp); | |
908 | if (error) | |
1da177e4 | 909 | return error; |
9492e135 | 910 | |
a2d1e351 | 911 | tty->driver_data = port; |
8f1e6723 | 912 | return tty_port_open(&port->port, tty, filp); |
1da177e4 LT |
913 | } |
914 | ||
978e595f AC |
915 | static void rc_flush_buffer(struct tty_struct *tty) |
916 | { | |
c9f19e96 | 917 | struct riscom_port *port = tty->driver_data; |
978e595f AC |
918 | unsigned long flags; |
919 | ||
920 | if (rc_paranoia_check(port, tty->name, "rc_flush_buffer")) | |
921 | return; | |
922 | ||
923 | spin_lock_irqsave(&riscom_lock, flags); | |
978e595f | 924 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; |
978e595f AC |
925 | spin_unlock_irqrestore(&riscom_lock, flags); |
926 | ||
927 | tty_wakeup(tty); | |
928 | } | |
929 | ||
90387f5e | 930 | static void rc_close_port(struct tty_port *port) |
1da177e4 | 931 | { |
1da177e4 | 932 | unsigned long flags; |
c1469425 AC |
933 | struct riscom_port *rp = container_of(port, struct riscom_port, port); |
934 | struct riscom_board *bp = port_Board(rp); | |
1da177e4 | 935 | unsigned long timeout; |
a6614999 | 936 | |
1da177e4 LT |
937 | /* |
938 | * At this point we stop accepting input. To do this, we | |
939 | * disable the receive line status interrupts, and tell the | |
940 | * interrupt driver to stop checking the data ready bit in the | |
941 | * line status register. | |
942 | */ | |
c2ba38cd AC |
943 | |
944 | spin_lock_irqsave(&riscom_lock, flags); | |
c1469425 | 945 | rp->IER &= ~IER_RXD; |
8f1e6723 AC |
946 | |
947 | rp->IER &= ~IER_TXRDY; | |
948 | rp->IER |= IER_TXEMPTY; | |
949 | rc_out(bp, CD180_CAR, port_No(rp)); | |
950 | rc_out(bp, CD180_IER, rp->IER); | |
951 | /* | |
952 | * Before we drop DTR, make sure the UART transmitter | |
953 | * has completely drained; this is especially | |
954 | * important if there is a transmit FIFO! | |
955 | */ | |
956 | timeout = jiffies + HZ; | |
957 | while (rp->IER & IER_TXEMPTY) { | |
958 | spin_unlock_irqrestore(&riscom_lock, flags); | |
959 | msleep_interruptible(jiffies_to_msecs(rp->timeout)); | |
960 | spin_lock_irqsave(&riscom_lock, flags); | |
961 | if (time_after(jiffies, timeout)) | |
962 | break; | |
1da177e4 | 963 | } |
90387f5e | 964 | rc_shutdown_port(port->tty, bp, rp); |
c2ba38cd | 965 | spin_unlock_irqrestore(&riscom_lock, flags); |
c1469425 AC |
966 | } |
967 | ||
968 | static void rc_close(struct tty_struct *tty, struct file *filp) | |
969 | { | |
970 | struct riscom_port *port = tty->driver_data; | |
971 | ||
972 | if (!port || rc_paranoia_check(port, tty->name, "close")) | |
973 | return; | |
6ff1ab28 | 974 | tty_port_close(&port->port, tty, filp); |
1da177e4 LT |
975 | } |
976 | ||
9492e135 | 977 | static int rc_write(struct tty_struct *tty, |
1da177e4 LT |
978 | const unsigned char *buf, int count) |
979 | { | |
c9f19e96 | 980 | struct riscom_port *port = tty->driver_data; |
1da177e4 LT |
981 | struct riscom_board *bp; |
982 | int c, total = 0; | |
983 | unsigned long flags; | |
9492e135 | 984 | |
1da177e4 LT |
985 | if (rc_paranoia_check(port, tty->name, "rc_write")) |
986 | return 0; | |
9492e135 | 987 | |
1da177e4 LT |
988 | bp = port_Board(port); |
989 | ||
1da177e4 | 990 | while (1) { |
d9afa435 JG |
991 | spin_lock_irqsave(&riscom_lock, flags); |
992 | ||
1da177e4 LT |
993 | c = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1, |
994 | SERIAL_XMIT_SIZE - port->xmit_head)); | |
d9afa435 JG |
995 | if (c <= 0) |
996 | break; /* lock continues to be held */ | |
1da177e4 | 997 | |
85f8f810 | 998 | memcpy(port->port.xmit_buf + port->xmit_head, buf, c); |
1da177e4 LT |
999 | port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1); |
1000 | port->xmit_cnt += c; | |
d9afa435 JG |
1001 | |
1002 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
1003 | |
1004 | buf += c; | |
1005 | count -= c; | |
1006 | total += c; | |
1007 | } | |
1008 | ||
1da177e4 LT |
1009 | if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped && |
1010 | !(port->IER & IER_TXRDY)) { | |
1011 | port->IER |= IER_TXRDY; | |
1012 | rc_out(bp, CD180_CAR, port_No(port)); | |
1013 | rc_out(bp, CD180_IER, port->IER); | |
1014 | } | |
d9afa435 JG |
1015 | |
1016 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
1017 | |
1018 | return total; | |
1019 | } | |
1020 | ||
9492e135 | 1021 | static int rc_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 | 1022 | { |
c9f19e96 | 1023 | struct riscom_port *port = tty->driver_data; |
1da177e4 | 1024 | unsigned long flags; |
bbbbb96f | 1025 | int ret = 0; |
1da177e4 LT |
1026 | |
1027 | if (rc_paranoia_check(port, tty->name, "rc_put_char")) | |
bbbbb96f | 1028 | return 0; |
1da177e4 | 1029 | |
d9afa435 | 1030 | spin_lock_irqsave(&riscom_lock, flags); |
9492e135 | 1031 | |
1da177e4 LT |
1032 | if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1) |
1033 | goto out; | |
1034 | ||
85f8f810 | 1035 | port->port.xmit_buf[port->xmit_head++] = ch; |
1da177e4 LT |
1036 | port->xmit_head &= SERIAL_XMIT_SIZE - 1; |
1037 | port->xmit_cnt++; | |
bbbbb96f | 1038 | ret = 1; |
d9afa435 JG |
1039 | |
1040 | out: | |
1041 | spin_unlock_irqrestore(&riscom_lock, flags); | |
bbbbb96f | 1042 | return ret; |
1da177e4 LT |
1043 | } |
1044 | ||
9492e135 | 1045 | static void rc_flush_chars(struct tty_struct *tty) |
1da177e4 | 1046 | { |
c9f19e96 | 1047 | struct riscom_port *port = tty->driver_data; |
1da177e4 | 1048 | unsigned long flags; |
9492e135 | 1049 | |
1da177e4 LT |
1050 | if (rc_paranoia_check(port, tty->name, "rc_flush_chars")) |
1051 | return; | |
9492e135 | 1052 | |
d99101fd | 1053 | if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped) |
1da177e4 LT |
1054 | return; |
1055 | ||
d9afa435 JG |
1056 | spin_lock_irqsave(&riscom_lock, flags); |
1057 | ||
1da177e4 LT |
1058 | port->IER |= IER_TXRDY; |
1059 | rc_out(port_Board(port), CD180_CAR, port_No(port)); | |
1060 | rc_out(port_Board(port), CD180_IER, port->IER); | |
d9afa435 JG |
1061 | |
1062 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1da177e4 LT |
1063 | } |
1064 | ||
9492e135 | 1065 | static int rc_write_room(struct tty_struct *tty) |
1da177e4 | 1066 | { |
c9f19e96 | 1067 | struct riscom_port *port = tty->driver_data; |
1da177e4 | 1068 | int ret; |
9492e135 | 1069 | |
1da177e4 LT |
1070 | if (rc_paranoia_check(port, tty->name, "rc_write_room")) |
1071 | return 0; | |
1072 | ||
1073 | ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; | |
1074 | if (ret < 0) | |
1075 | ret = 0; | |
1076 | return ret; | |
1077 | } | |
1078 | ||
1079 | static int rc_chars_in_buffer(struct tty_struct *tty) | |
1080 | { | |
c9f19e96 | 1081 | struct riscom_port *port = tty->driver_data; |
9492e135 | 1082 | |
1da177e4 LT |
1083 | if (rc_paranoia_check(port, tty->name, "rc_chars_in_buffer")) |
1084 | return 0; | |
9492e135 | 1085 | |
1da177e4 LT |
1086 | return port->xmit_cnt; |
1087 | } | |
1088 | ||
1da177e4 LT |
1089 | static int rc_tiocmget(struct tty_struct *tty, struct file *file) |
1090 | { | |
c9f19e96 | 1091 | struct riscom_port *port = tty->driver_data; |
9492e135 | 1092 | struct riscom_board *bp; |
1da177e4 LT |
1093 | unsigned char status; |
1094 | unsigned int result; | |
1095 | unsigned long flags; | |
1096 | ||
bf9d8929 | 1097 | if (rc_paranoia_check(port, tty->name, __func__)) |
1da177e4 LT |
1098 | return -ENODEV; |
1099 | ||
1100 | bp = port_Board(port); | |
d9afa435 JG |
1101 | |
1102 | spin_lock_irqsave(&riscom_lock, flags); | |
1103 | ||
1da177e4 LT |
1104 | rc_out(bp, CD180_CAR, port_No(port)); |
1105 | status = rc_in(bp, CD180_MSVR); | |
1106 | result = rc_in(bp, RC_RI) & (1u << port_No(port)) ? 0 : TIOCM_RNG; | |
d9afa435 JG |
1107 | |
1108 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1109 | ||
1da177e4 LT |
1110 | result |= ((status & MSVR_RTS) ? TIOCM_RTS : 0) |
1111 | | ((status & MSVR_DTR) ? TIOCM_DTR : 0) | |
1112 | | ((status & MSVR_CD) ? TIOCM_CAR : 0) | |
1113 | | ((status & MSVR_DSR) ? TIOCM_DSR : 0) | |
1114 | | ((status & MSVR_CTS) ? TIOCM_CTS : 0); | |
1115 | return result; | |
1116 | } | |
1117 | ||
1118 | static int rc_tiocmset(struct tty_struct *tty, struct file *file, | |
1119 | unsigned int set, unsigned int clear) | |
1120 | { | |
c9f19e96 | 1121 | struct riscom_port *port = tty->driver_data; |
1da177e4 LT |
1122 | unsigned long flags; |
1123 | struct riscom_board *bp; | |
1124 | ||
bf9d8929 | 1125 | if (rc_paranoia_check(port, tty->name, __func__)) |
1da177e4 LT |
1126 | return -ENODEV; |
1127 | ||
1128 | bp = port_Board(port); | |
1129 | ||
d9afa435 JG |
1130 | spin_lock_irqsave(&riscom_lock, flags); |
1131 | ||
1da177e4 LT |
1132 | if (set & TIOCM_RTS) |
1133 | port->MSVR |= MSVR_RTS; | |
1134 | if (set & TIOCM_DTR) | |
1135 | bp->DTR &= ~(1u << port_No(port)); | |
1136 | ||
1137 | if (clear & TIOCM_RTS) | |
1138 | port->MSVR &= ~MSVR_RTS; | |
1139 | if (clear & TIOCM_DTR) | |
1140 | bp->DTR |= (1u << port_No(port)); | |
1141 | ||
1142 | rc_out(bp, CD180_CAR, port_No(port)); | |
1143 | rc_out(bp, CD180_MSVR, port->MSVR); | |
1144 | rc_out(bp, RC_DTR, bp->DTR); | |
d9afa435 JG |
1145 | |
1146 | spin_unlock_irqrestore(&riscom_lock, flags); | |
1147 | ||
1da177e4 LT |
1148 | return 0; |
1149 | } | |
1150 | ||
781cff5c | 1151 | static int rc_send_break(struct tty_struct *tty, int length) |
1da177e4 | 1152 | { |
c9f19e96 | 1153 | struct riscom_port *port = tty->driver_data; |
1da177e4 LT |
1154 | struct riscom_board *bp = port_Board(port); |
1155 | unsigned long flags; | |
9492e135 | 1156 | |
781cff5c AC |
1157 | if (length == 0 || length == -1) |
1158 | return -EOPNOTSUPP; | |
1159 | ||
d9afa435 JG |
1160 | spin_lock_irqsave(&riscom_lock, flags); |
1161 | ||
1da177e4 LT |
1162 | port->break_length = RISCOM_TPS / HZ * length; |
1163 | port->COR2 |= COR2_ETC; | |
1164 | port->IER |= IER_TXRDY; | |
1165 | rc_out(bp, CD180_CAR, port_No(port)); | |
1166 | rc_out(bp, CD180_COR2, port->COR2); | |
1167 | rc_out(bp, CD180_IER, port->IER); | |
1168 | rc_wait_CCR(bp); | |
1169 | rc_out(bp, CD180_CCR, CCR_CORCHG2); | |
1170 | rc_wait_CCR(bp); | |
d9afa435 JG |
1171 | |
1172 | spin_unlock_irqrestore(&riscom_lock, flags); | |
781cff5c | 1173 | return 0; |
1da177e4 LT |
1174 | } |
1175 | ||
6ff1ab28 | 1176 | static int rc_set_serial_info(struct tty_struct *tty, struct riscom_port *port, |
9492e135 | 1177 | struct serial_struct __user *newinfo) |
1da177e4 LT |
1178 | { |
1179 | struct serial_struct tmp; | |
1180 | struct riscom_board *bp = port_Board(port); | |
1181 | int change_speed; | |
9492e135 | 1182 | |
1da177e4 LT |
1183 | if (copy_from_user(&tmp, newinfo, sizeof(tmp))) |
1184 | return -EFAULT; | |
9492e135 | 1185 | |
bf936f92 | 1186 | mutex_lock(&port->port.mutex); |
85f8f810 | 1187 | change_speed = ((port->port.flags & ASYNC_SPD_MASK) != |
1da177e4 | 1188 | (tmp.flags & ASYNC_SPD_MASK)); |
9492e135 | 1189 | |
1da177e4 | 1190 | if (!capable(CAP_SYS_ADMIN)) { |
44b7d1b3 AC |
1191 | if ((tmp.close_delay != port->port.close_delay) || |
1192 | (tmp.closing_wait != port->port.closing_wait) || | |
1da177e4 | 1193 | ((tmp.flags & ~ASYNC_USR_MASK) != |
bf936f92 AC |
1194 | (port->port.flags & ~ASYNC_USR_MASK))) { |
1195 | mutex_unlock(&port->port.mutex); | |
1da177e4 | 1196 | return -EPERM; |
bf936f92 | 1197 | } |
85f8f810 | 1198 | port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) | |
1da177e4 LT |
1199 | (tmp.flags & ASYNC_USR_MASK)); |
1200 | } else { | |
85f8f810 | 1201 | port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) | |
1da177e4 | 1202 | (tmp.flags & ASYNC_FLAGS)); |
44b7d1b3 AC |
1203 | port->port.close_delay = tmp.close_delay; |
1204 | port->port.closing_wait = tmp.closing_wait; | |
1da177e4 LT |
1205 | } |
1206 | if (change_speed) { | |
d9afa435 JG |
1207 | unsigned long flags; |
1208 | ||
1209 | spin_lock_irqsave(&riscom_lock, flags); | |
6ff1ab28 | 1210 | rc_change_speed(tty, bp, port); |
d9afa435 | 1211 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 | 1212 | } |
bf936f92 | 1213 | mutex_unlock(&port->port.mutex); |
1da177e4 LT |
1214 | return 0; |
1215 | } | |
1216 | ||
9492e135 | 1217 | static int rc_get_serial_info(struct riscom_port *port, |
1da177e4 LT |
1218 | struct serial_struct __user *retinfo) |
1219 | { | |
1220 | struct serial_struct tmp; | |
1221 | struct riscom_board *bp = port_Board(port); | |
9492e135 | 1222 | |
1da177e4 LT |
1223 | memset(&tmp, 0, sizeof(tmp)); |
1224 | tmp.type = PORT_CIRRUS; | |
1225 | tmp.line = port - rc_port; | |
bf936f92 AC |
1226 | |
1227 | mutex_lock(&port->port.mutex); | |
1da177e4 LT |
1228 | tmp.port = bp->base; |
1229 | tmp.irq = bp->irq; | |
85f8f810 | 1230 | tmp.flags = port->port.flags; |
1da177e4 | 1231 | tmp.baud_base = (RC_OSCFREQ + CD180_TPC/2) / CD180_TPC; |
44b7d1b3 AC |
1232 | tmp.close_delay = port->port.close_delay * HZ/100; |
1233 | tmp.closing_wait = port->port.closing_wait * HZ/100; | |
bf936f92 | 1234 | mutex_unlock(&port->port.mutex); |
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 | 1250 | case TIOCGSERIAL: |
eb174552 | 1251 | retval = rc_get_serial_info(port, argp); |
1da177e4 | 1252 | break; |
9492e135 | 1253 | case TIOCSSERIAL: |
6ff1ab28 | 1254 | retval = rc_set_serial_info(tty, port, argp); |
eb174552 | 1255 | break; |
9492e135 | 1256 | default: |
eb174552 | 1257 | retval = -ENOIOCTLCMD; |
1da177e4 | 1258 | } |
eb174552 | 1259 | return retval; |
1da177e4 LT |
1260 | } |
1261 | ||
9492e135 | 1262 | static void rc_throttle(struct tty_struct *tty) |
1da177e4 | 1263 | { |
c9f19e96 | 1264 | struct riscom_port *port = tty->driver_data; |
1da177e4 LT |
1265 | struct riscom_board *bp; |
1266 | unsigned long flags; | |
9492e135 | 1267 | |
1da177e4 LT |
1268 | if (rc_paranoia_check(port, tty->name, "rc_throttle")) |
1269 | return; | |
1da177e4 | 1270 | bp = port_Board(port); |
d9afa435 JG |
1271 | |
1272 | spin_lock_irqsave(&riscom_lock, flags); | |
1da177e4 LT |
1273 | port->MSVR &= ~MSVR_RTS; |
1274 | rc_out(bp, CD180_CAR, port_No(port)); | |
d9afa435 | 1275 | if (I_IXOFF(tty)) { |
1da177e4 LT |
1276 | rc_wait_CCR(bp); |
1277 | rc_out(bp, CD180_CCR, CCR_SSCH2); | |
1278 | rc_wait_CCR(bp); | |
1279 | } | |
1280 | rc_out(bp, CD180_MSVR, port->MSVR); | |
d9afa435 | 1281 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1282 | } |
1283 | ||
9492e135 | 1284 | static void rc_unthrottle(struct tty_struct *tty) |
1da177e4 | 1285 | { |
c9f19e96 | 1286 | struct riscom_port *port = tty->driver_data; |
1da177e4 LT |
1287 | struct riscom_board *bp; |
1288 | unsigned long flags; | |
9492e135 | 1289 | |
1da177e4 LT |
1290 | if (rc_paranoia_check(port, tty->name, "rc_unthrottle")) |
1291 | return; | |
1da177e4 | 1292 | bp = port_Board(port); |
d9afa435 | 1293 | |
9492e135 | 1294 | spin_lock_irqsave(&riscom_lock, flags); |
1da177e4 LT |
1295 | port->MSVR |= MSVR_RTS; |
1296 | rc_out(bp, CD180_CAR, port_No(port)); | |
1297 | if (I_IXOFF(tty)) { | |
1298 | rc_wait_CCR(bp); | |
1299 | rc_out(bp, CD180_CCR, CCR_SSCH1); | |
1300 | rc_wait_CCR(bp); | |
1301 | } | |
1302 | rc_out(bp, CD180_MSVR, port->MSVR); | |
d9afa435 | 1303 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1304 | } |
1305 | ||
9492e135 | 1306 | static void rc_stop(struct tty_struct *tty) |
1da177e4 | 1307 | { |
c9f19e96 | 1308 | struct riscom_port *port = tty->driver_data; |
1da177e4 LT |
1309 | struct riscom_board *bp; |
1310 | unsigned long flags; | |
9492e135 | 1311 | |
1da177e4 LT |
1312 | if (rc_paranoia_check(port, tty->name, "rc_stop")) |
1313 | return; | |
9492e135 | 1314 | |
1da177e4 | 1315 | bp = port_Board(port); |
d9afa435 | 1316 | |
9492e135 | 1317 | spin_lock_irqsave(&riscom_lock, flags); |
1da177e4 LT |
1318 | port->IER &= ~IER_TXRDY; |
1319 | rc_out(bp, CD180_CAR, port_No(port)); | |
1320 | rc_out(bp, CD180_IER, port->IER); | |
d9afa435 | 1321 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1322 | } |
1323 | ||
9492e135 | 1324 | static void rc_start(struct tty_struct *tty) |
1da177e4 | 1325 | { |
c9f19e96 | 1326 | struct riscom_port *port = tty->driver_data; |
1da177e4 LT |
1327 | struct riscom_board *bp; |
1328 | unsigned long flags; | |
9492e135 | 1329 | |
1da177e4 LT |
1330 | if (rc_paranoia_check(port, tty->name, "rc_start")) |
1331 | return; | |
9492e135 | 1332 | |
1da177e4 | 1333 | bp = port_Board(port); |
9492e135 | 1334 | |
d9afa435 JG |
1335 | spin_lock_irqsave(&riscom_lock, flags); |
1336 | ||
85f8f810 | 1337 | if (port->xmit_cnt && port->port.xmit_buf && !(port->IER & IER_TXRDY)) { |
1da177e4 LT |
1338 | port->IER |= IER_TXRDY; |
1339 | rc_out(bp, CD180_CAR, port_No(port)); | |
1340 | rc_out(bp, CD180_IER, port->IER); | |
1341 | } | |
d9afa435 | 1342 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1343 | } |
1344 | ||
9492e135 | 1345 | static void rc_hangup(struct tty_struct *tty) |
1da177e4 | 1346 | { |
c9f19e96 | 1347 | struct riscom_port *port = tty->driver_data; |
9492e135 | 1348 | |
1da177e4 LT |
1349 | if (rc_paranoia_check(port, tty->name, "rc_hangup")) |
1350 | return; | |
9492e135 | 1351 | |
6ff1ab28 | 1352 | tty_port_hangup(&port->port); |
1da177e4 LT |
1353 | } |
1354 | ||
9492e135 AC |
1355 | static void rc_set_termios(struct tty_struct *tty, |
1356 | struct ktermios *old_termios) | |
1da177e4 | 1357 | { |
c9f19e96 | 1358 | struct riscom_port *port = tty->driver_data; |
1da177e4 | 1359 | unsigned long flags; |
9492e135 | 1360 | |
1da177e4 LT |
1361 | if (rc_paranoia_check(port, tty->name, "rc_set_termios")) |
1362 | return; | |
1da177e4 | 1363 | |
d9afa435 | 1364 | spin_lock_irqsave(&riscom_lock, flags); |
6ff1ab28 | 1365 | rc_change_speed(tty, port_Board(port), port); |
d9afa435 | 1366 | spin_unlock_irqrestore(&riscom_lock, flags); |
1da177e4 LT |
1367 | |
1368 | if ((old_termios->c_cflag & CRTSCTS) && | |
1369 | !(tty->termios->c_cflag & CRTSCTS)) { | |
1370 | tty->hw_stopped = 0; | |
1371 | rc_start(tty); | |
1372 | } | |
1373 | } | |
1374 | ||
b68e31d0 | 1375 | static const struct tty_operations riscom_ops = { |
1da177e4 LT |
1376 | .open = rc_open, |
1377 | .close = rc_close, | |
1378 | .write = rc_write, | |
1379 | .put_char = rc_put_char, | |
1380 | .flush_chars = rc_flush_chars, | |
1381 | .write_room = rc_write_room, | |
1382 | .chars_in_buffer = rc_chars_in_buffer, | |
1383 | .flush_buffer = rc_flush_buffer, | |
1384 | .ioctl = rc_ioctl, | |
1385 | .throttle = rc_throttle, | |
1386 | .unthrottle = rc_unthrottle, | |
1387 | .set_termios = rc_set_termios, | |
1388 | .stop = rc_stop, | |
1389 | .start = rc_start, | |
1390 | .hangup = rc_hangup, | |
1391 | .tiocmget = rc_tiocmget, | |
1392 | .tiocmset = rc_tiocmset, | |
781cff5c | 1393 | .break_ctl = rc_send_break, |
1da177e4 LT |
1394 | }; |
1395 | ||
31f35939 AC |
1396 | static const struct tty_port_operations riscom_port_ops = { |
1397 | .carrier_raised = carrier_raised, | |
8f1e6723 | 1398 | .dtr_rts = dtr_rts, |
6ff1ab28 | 1399 | .shutdown = rc_close_port, |
8f1e6723 | 1400 | .activate = rc_activate_port, |
31f35939 AC |
1401 | }; |
1402 | ||
1403 | ||
1386a820 | 1404 | static int __init rc_init_drivers(void) |
1da177e4 LT |
1405 | { |
1406 | int error; | |
1407 | int i; | |
1408 | ||
1409 | riscom_driver = alloc_tty_driver(RC_NBOARD * RC_NPORT); | |
9492e135 | 1410 | if (!riscom_driver) |
1da177e4 | 1411 | return -ENOMEM; |
9492e135 | 1412 | |
1da177e4 LT |
1413 | riscom_driver->owner = THIS_MODULE; |
1414 | riscom_driver->name = "ttyL"; | |
1da177e4 LT |
1415 | riscom_driver->major = RISCOM8_NORMAL_MAJOR; |
1416 | riscom_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
1417 | riscom_driver->subtype = SERIAL_TYPE_NORMAL; | |
1418 | riscom_driver->init_termios = tty_std_termios; | |
1419 | riscom_driver->init_termios.c_cflag = | |
1420 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
606d099c AC |
1421 | riscom_driver->init_termios.c_ispeed = 9600; |
1422 | riscom_driver->init_termios.c_ospeed = 9600; | |
781cff5c | 1423 | riscom_driver->flags = TTY_DRIVER_REAL_RAW | TTY_DRIVER_HARDWARE_BREAK; |
1da177e4 | 1424 | tty_set_operations(riscom_driver, &riscom_ops); |
9492e135 AC |
1425 | error = tty_register_driver(riscom_driver); |
1426 | if (error != 0) { | |
1da177e4 LT |
1427 | put_tty_driver(riscom_driver); |
1428 | printk(KERN_ERR "rc: Couldn't register RISCom/8 driver, " | |
9492e135 | 1429 | "error = %d\n", error); |
1da177e4 LT |
1430 | return 1; |
1431 | } | |
1da177e4 LT |
1432 | memset(rc_port, 0, sizeof(rc_port)); |
1433 | for (i = 0; i < RC_NPORT * RC_NBOARD; i++) { | |
85f8f810 | 1434 | tty_port_init(&rc_port[i].port); |
31f35939 | 1435 | rc_port[i].port.ops = &riscom_port_ops; |
44b7d1b3 | 1436 | rc_port[i].magic = RISCOM8_MAGIC; |
1da177e4 | 1437 | } |
1da177e4 LT |
1438 | return 0; |
1439 | } | |
1440 | ||
1441 | static void rc_release_drivers(void) | |
1442 | { | |
1da177e4 LT |
1443 | tty_unregister_driver(riscom_driver); |
1444 | put_tty_driver(riscom_driver); | |
1da177e4 LT |
1445 | } |
1446 | ||
1447 | #ifndef MODULE | |
1448 | /* | |
1449 | * Called at boot time. | |
9492e135 | 1450 | * |
1da177e4 LT |
1451 | * You can specify IO base for up to RC_NBOARD cards, |
1452 | * using line "riscom8=0xiobase1,0xiobase2,.." at LILO prompt. | |
1453 | * Note that there will be no probing at default | |
1454 | * addresses in this case. | |
1455 | * | |
9492e135 | 1456 | */ |
1da177e4 LT |
1457 | static int __init riscom8_setup(char *str) |
1458 | { | |
1459 | int ints[RC_NBOARD]; | |
1460 | int i; | |
1461 | ||
1462 | str = get_options(str, ARRAY_SIZE(ints), ints); | |
1463 | ||
1464 | for (i = 0; i < RC_NBOARD; i++) { | |
1465 | if (i < ints[0]) | |
1466 | rc_board[i].base = ints[i+1]; | |
9492e135 | 1467 | else |
1da177e4 LT |
1468 | rc_board[i].base = 0; |
1469 | } | |
1470 | return 1; | |
1471 | } | |
1472 | ||
1473 | __setup("riscom8=", riscom8_setup); | |
1474 | #endif | |
1475 | ||
1476 | static char banner[] __initdata = | |
1477 | KERN_INFO "rc: SDL RISCom/8 card driver v1.1, (c) D.Gorodchanin " | |
1478 | "1994-1996.\n"; | |
1479 | static char no_boards_msg[] __initdata = | |
1480 | KERN_INFO "rc: No RISCom/8 boards detected.\n"; | |
1481 | ||
9492e135 AC |
1482 | /* |
1483 | * This routine must be called by kernel at boot time | |
1da177e4 LT |
1484 | */ |
1485 | static int __init riscom8_init(void) | |
1486 | { | |
1487 | int i; | |
1488 | int found = 0; | |
1489 | ||
1490 | printk(banner); | |
1491 | ||
9492e135 | 1492 | if (rc_init_drivers()) |
1da177e4 LT |
1493 | return -EIO; |
1494 | ||
9492e135 AC |
1495 | for (i = 0; i < RC_NBOARD; i++) |
1496 | if (rc_board[i].base && !rc_probe(&rc_board[i])) | |
1da177e4 | 1497 | found++; |
1da177e4 LT |
1498 | if (!found) { |
1499 | rc_release_drivers(); | |
1500 | printk(no_boards_msg); | |
1501 | return -EIO; | |
1502 | } | |
1503 | return 0; | |
1504 | } | |
1505 | ||
1506 | #ifdef MODULE | |
1507 | static int iobase; | |
1508 | static int iobase1; | |
1509 | static int iobase2; | |
1510 | static int iobase3; | |
8d3b33f6 RR |
1511 | module_param(iobase, int, 0); |
1512 | module_param(iobase1, int, 0); | |
1513 | module_param(iobase2, int, 0); | |
1514 | module_param(iobase3, int, 0); | |
1da177e4 LT |
1515 | |
1516 | MODULE_LICENSE("GPL"); | |
5c9f5806 | 1517 | MODULE_ALIAS_CHARDEV_MAJOR(RISCOM8_NORMAL_MAJOR); |
1da177e4 LT |
1518 | #endif /* MODULE */ |
1519 | ||
1520 | /* | |
1521 | * You can setup up to 4 boards (current value of RC_NBOARD) | |
1522 | * by specifying "iobase=0xXXX iobase1=0xXXX ..." as insmod parameter. | |
1523 | * | |
1524 | */ | |
9492e135 | 1525 | static int __init riscom8_init_module(void) |
1da177e4 LT |
1526 | { |
1527 | #ifdef MODULE | |
1528 | int i; | |
1529 | ||
1530 | if (iobase || iobase1 || iobase2 || iobase3) { | |
9492e135 | 1531 | for (i = 0; i < RC_NBOARD; i++) |
9efda797 | 1532 | rc_board[i].base = 0; |
1da177e4 LT |
1533 | } |
1534 | ||
1535 | if (iobase) | |
1536 | rc_board[0].base = iobase; | |
1537 | if (iobase1) | |
1538 | rc_board[1].base = iobase1; | |
1539 | if (iobase2) | |
1540 | rc_board[2].base = iobase2; | |
1541 | if (iobase3) | |
1542 | rc_board[3].base = iobase3; | |
1543 | #endif /* MODULE */ | |
1544 | ||
1545 | return riscom8_init(); | |
1546 | } | |
9492e135 AC |
1547 | |
1548 | static void __exit riscom8_exit_module(void) | |
1da177e4 LT |
1549 | { |
1550 | int i; | |
9492e135 | 1551 | |
1da177e4 | 1552 | rc_release_drivers(); |
9492e135 AC |
1553 | for (i = 0; i < RC_NBOARD; i++) |
1554 | if (rc_board[i].flags & RC_BOARD_PRESENT) | |
1da177e4 | 1555 | rc_release_io_range(&rc_board[i]); |
9492e135 | 1556 | |
1da177e4 LT |
1557 | } |
1558 | ||
1559 | module_init(riscom8_init_module); | |
1560 | module_exit(riscom8_exit_module); |