Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * specialix.c -- specialix IO8+ multiport serial driver. | |
3 | * | |
4 | * Copyright (C) 1997 Roger Wolff (R.E.Wolff@BitWizard.nl) | |
5 | * Copyright (C) 1994-1996 Dmitry Gorodchanin (pgmdsg@ibi.com) | |
6 | * | |
7 | * Specialix pays for the development and support of this driver. | |
8 | * Please DO contact io8-linux@specialix.co.uk if you require | |
9 | * support. But please read the documentation (specialix.txt) | |
10 | * first. | |
11 | * | |
12 | * This driver was developped in the BitWizard linux device | |
13 | * driver service. If you require a linux device driver for your | |
14 | * product, please contact devices@BitWizard.nl for a quote. | |
15 | * | |
16 | * This code is firmly based on the riscom/8 serial driver, | |
17 | * written by Dmitry Gorodchanin. The specialix IO8+ card | |
18 | * programming information was obtained from the CL-CD1865 Data | |
19 | * Book, and Specialix document number 6200059: IO8+ Hardware | |
20 | * Functional Specification. | |
21 | * | |
22 | * This program is free software; you can redistribute it and/or | |
23 | * modify it under the terms of the GNU General Public License as | |
24 | * published by the Free Software Foundation; either version 2 of | |
25 | * the License, or (at your option) any later version. | |
26 | * | |
27 | * This program is distributed in the hope that it will be | |
28 | * useful, but WITHOUT ANY WARRANTY; without even the implied | |
29 | * warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR | |
30 | * PURPOSE. See the GNU General Public License for more details. | |
31 | * | |
32 | * You should have received a copy of the GNU General Public | |
33 | * License along with this program; if not, write to the Free | |
34 | * Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, | |
35 | * USA. | |
36 | * | |
37 | * Revision history: | |
38 | * | |
39 | * Revision 1.0: April 1st 1997. | |
40 | * Initial release for alpha testing. | |
d61780c0 JG |
41 | * Revision 1.1: April 14th 1997. |
42 | * Incorporated Richard Hudsons suggestions, | |
1da177e4 LT |
43 | * removed some debugging printk's. |
44 | * Revision 1.2: April 15th 1997. | |
45 | * Ported to 2.1.x kernels. | |
d61780c0 JG |
46 | * Revision 1.3: April 17th 1997 |
47 | * Backported to 2.0. (Compatibility macros). | |
1da177e4 | 48 | * Revision 1.4: April 18th 1997 |
d61780c0 JG |
49 | * Fixed DTR/RTS bug that caused the card to indicate |
50 | * "don't send data" to a modem after the password prompt. | |
1da177e4 LT |
51 | * Fixed bug for premature (fake) interrupts. |
52 | * Revision 1.5: April 19th 1997 | |
d61780c0 | 53 | * fixed a minor typo in the header file, cleanup a little. |
1da177e4 LT |
54 | * performance warnings are now MAXed at once per minute. |
55 | * Revision 1.6: May 23 1997 | |
56 | * Changed the specialix=... format to include interrupt. | |
57 | * Revision 1.7: May 27 1997 | |
58 | * Made many more debug printk's a compile time option. | |
59 | * Revision 1.8: Jul 1 1997 | |
60 | * port to linux-2.1.43 kernel. | |
61 | * Revision 1.9: Oct 9 1998 | |
62 | * Added stuff for the IO8+/PCI version. | |
d61780c0 JG |
63 | * Revision 1.10: Oct 22 1999 / Jan 21 2000. |
64 | * Added stuff for setserial. | |
1da177e4 | 65 | * Nicolas Mailhot (Nicolas.Mailhot@email.enst.fr) |
d61780c0 | 66 | * |
1da177e4 LT |
67 | */ |
68 | ||
69 | #define VERSION "1.11" | |
70 | ||
71 | ||
72 | /* | |
73 | * There is a bunch of documentation about the card, jumpers, config | |
74 | * settings, restrictions, cables, device names and numbers in | |
31c00fc1 | 75 | * Documentation/serial/specialix.txt |
1da177e4 LT |
76 | */ |
77 | ||
1da177e4 LT |
78 | #include <linux/module.h> |
79 | ||
a72492bd | 80 | #include <linux/io.h> |
1da177e4 LT |
81 | #include <linux/kernel.h> |
82 | #include <linux/sched.h> | |
83 | #include <linux/ioport.h> | |
84 | #include <linux/interrupt.h> | |
85 | #include <linux/errno.h> | |
86 | #include <linux/tty.h> | |
33f0f88f | 87 | #include <linux/tty_flip.h> |
1da177e4 LT |
88 | #include <linux/mm.h> |
89 | #include <linux/serial.h> | |
405f5571 | 90 | #include <linux/smp_lock.h> |
1da177e4 LT |
91 | #include <linux/fcntl.h> |
92 | #include <linux/major.h> | |
93 | #include <linux/delay.h> | |
1da177e4 LT |
94 | #include <linux/pci.h> |
95 | #include <linux/init.h> | |
a72492bd | 96 | #include <linux/uaccess.h> |
1da177e4 LT |
97 | |
98 | #include "specialix_io8.h" | |
99 | #include "cd1865.h" | |
100 | ||
101 | ||
102 | /* | |
103 | This driver can spew a whole lot of debugging output at you. If you | |
104 | need maximum performance, you should disable the DEBUG define. To | |
105 | aid in debugging in the field, I'm leaving the compile-time debug | |
106 | features enabled, and disable them "runtime". That allows me to | |
107 | instruct people with problems to enable debugging without requiring | |
108 | them to recompile... | |
109 | */ | |
110 | #define DEBUG | |
111 | ||
112 | static int sx_debug; | |
113 | static int sx_rxfifo = SPECIALIX_RXFIFO; | |
d2fbd0f2 | 114 | static int sx_rtscts; |
1da177e4 LT |
115 | |
116 | #ifdef DEBUG | |
a72492bd | 117 | #define dprintk(f, str...) if (sx_debug & f) printk(str) |
1da177e4 LT |
118 | #else |
119 | #define dprintk(f, str...) /* nothing */ | |
120 | #endif | |
121 | ||
122 | #define SX_DEBUG_FLOW 0x0001 | |
123 | #define SX_DEBUG_DATA 0x0002 | |
124 | #define SX_DEBUG_PROBE 0x0004 | |
125 | #define SX_DEBUG_CHAN 0x0008 | |
126 | #define SX_DEBUG_INIT 0x0010 | |
127 | #define SX_DEBUG_RX 0x0020 | |
128 | #define SX_DEBUG_TX 0x0040 | |
129 | #define SX_DEBUG_IRQ 0x0080 | |
130 | #define SX_DEBUG_OPEN 0x0100 | |
131 | #define SX_DEBUG_TERMIOS 0x0200 | |
132 | #define SX_DEBUG_SIGNALS 0x0400 | |
133 | #define SX_DEBUG_FIFO 0x0800 | |
134 | ||
135 | ||
a72492bd AC |
136 | #define func_enter() dprintk(SX_DEBUG_FLOW, "io8: enter %s\n", __func__) |
137 | #define func_exit() dprintk(SX_DEBUG_FLOW, "io8: exit %s\n", __func__) | |
1da177e4 | 138 | |
1da177e4 LT |
139 | |
140 | /* Configurable options: */ | |
141 | ||
142 | /* Am I paranoid or not ? ;-) */ | |
143 | #define SPECIALIX_PARANOIA_CHECK | |
144 | ||
d61780c0 | 145 | /* |
1da177e4 LT |
146 | * The following defines are mostly for testing purposes. But if you need |
147 | * some nice reporting in your syslog, you can define them also. | |
148 | */ | |
149 | #undef SX_REPORT_FIFO | |
150 | #undef SX_REPORT_OVERRUN | |
151 | ||
152 | ||
153 | ||
1da177e4 LT |
154 | |
155 | #define SPECIALIX_LEGAL_FLAGS \ | |
156 | (ASYNC_HUP_NOTIFY | ASYNC_SAK | ASYNC_SPLIT_TERMIOS | \ | |
157 | ASYNC_SPD_HI | ASYNC_SPEED_VHI | ASYNC_SESSION_LOCKOUT | \ | |
158 | ASYNC_PGRP_LOCKOUT | ASYNC_CALLOUT_NOHUP) | |
159 | ||
1da177e4 | 160 | static struct tty_driver *specialix_driver; |
1da177e4 | 161 | |
1da177e4 LT |
162 | static struct specialix_board sx_board[SX_NBOARD] = { |
163 | { 0, SX_IOBASE1, 9, }, | |
164 | { 0, SX_IOBASE2, 11, }, | |
165 | { 0, SX_IOBASE3, 12, }, | |
166 | { 0, SX_IOBASE4, 15, }, | |
167 | }; | |
168 | ||
169 | static struct specialix_port sx_port[SX_NBOARD * SX_NPORT]; | |
170 | ||
171 | ||
d2fbd0f2 | 172 | static int sx_paranoia_check(struct specialix_port const *port, |
1da177e4 LT |
173 | char *name, const char *routine) |
174 | { | |
175 | #ifdef SPECIALIX_PARANOIA_CHECK | |
a72492bd AC |
176 | static const char *badmagic = KERN_ERR |
177 | "sx: Warning: bad specialix port magic number for device %s in %s\n"; | |
178 | static const char *badinfo = KERN_ERR | |
179 | "sx: Warning: null specialix port for device %s in %s\n"; | |
d61780c0 | 180 | |
1da177e4 LT |
181 | if (!port) { |
182 | printk(badinfo, name, routine); | |
183 | return 1; | |
184 | } | |
185 | if (port->magic != SPECIALIX_MAGIC) { | |
186 | printk(badmagic, name, routine); | |
187 | return 1; | |
188 | } | |
189 | #endif | |
190 | return 0; | |
191 | } | |
192 | ||
193 | ||
194 | /* | |
d61780c0 | 195 | * |
1da177e4 | 196 | * Service functions for specialix IO8+ driver. |
d61780c0 | 197 | * |
1da177e4 LT |
198 | */ |
199 | ||
200 | /* Get board number from pointer */ | |
a72492bd | 201 | static inline int board_No(struct specialix_board *bp) |
1da177e4 LT |
202 | { |
203 | return bp - sx_board; | |
204 | } | |
205 | ||
206 | ||
207 | /* Get port number from pointer */ | |
a72492bd | 208 | static inline int port_No(struct specialix_port const *port) |
1da177e4 | 209 | { |
d61780c0 | 210 | return SX_PORT(port - sx_port); |
1da177e4 LT |
211 | } |
212 | ||
213 | ||
214 | /* Get pointer to board from pointer to port */ | |
a72492bd AC |
215 | static inline struct specialix_board *port_Board( |
216 | struct specialix_port const *port) | |
1da177e4 LT |
217 | { |
218 | return &sx_board[SX_BOARD(port - sx_port)]; | |
219 | } | |
220 | ||
221 | ||
222 | /* Input Byte from CL CD186x register */ | |
a72492bd AC |
223 | static inline unsigned char sx_in(struct specialix_board *bp, |
224 | unsigned short reg) | |
1da177e4 LT |
225 | { |
226 | bp->reg = reg | 0x80; | |
a72492bd AC |
227 | outb(reg | 0x80, bp->base + SX_ADDR_REG); |
228 | return inb(bp->base + SX_DATA_REG); | |
1da177e4 LT |
229 | } |
230 | ||
231 | ||
232 | /* Output Byte to CL CD186x register */ | |
a72492bd | 233 | static inline void sx_out(struct specialix_board *bp, unsigned short reg, |
1da177e4 LT |
234 | unsigned char val) |
235 | { | |
236 | bp->reg = reg | 0x80; | |
a72492bd AC |
237 | outb(reg | 0x80, bp->base + SX_ADDR_REG); |
238 | outb(val, bp->base + SX_DATA_REG); | |
1da177e4 LT |
239 | } |
240 | ||
241 | ||
242 | /* Input Byte from CL CD186x register */ | |
a72492bd AC |
243 | static inline unsigned char sx_in_off(struct specialix_board *bp, |
244 | unsigned short reg) | |
1da177e4 LT |
245 | { |
246 | bp->reg = reg; | |
a72492bd AC |
247 | outb(reg, bp->base + SX_ADDR_REG); |
248 | return inb(bp->base + SX_DATA_REG); | |
1da177e4 LT |
249 | } |
250 | ||
251 | ||
252 | /* Output Byte to CL CD186x register */ | |
a72492bd AC |
253 | static inline void sx_out_off(struct specialix_board *bp, |
254 | unsigned short reg, unsigned char val) | |
1da177e4 LT |
255 | { |
256 | bp->reg = reg; | |
a72492bd AC |
257 | outb(reg, bp->base + SX_ADDR_REG); |
258 | outb(val, bp->base + SX_DATA_REG); | |
1da177e4 LT |
259 | } |
260 | ||
261 | ||
262 | /* Wait for Channel Command Register ready */ | |
d2fbd0f2 | 263 | static void sx_wait_CCR(struct specialix_board *bp) |
1da177e4 LT |
264 | { |
265 | unsigned long delay, flags; | |
266 | unsigned char ccr; | |
267 | ||
268 | for (delay = SX_CCR_TIMEOUT; delay; delay--) { | |
269 | spin_lock_irqsave(&bp->lock, flags); | |
270 | ccr = sx_in(bp, CD186x_CCR); | |
271 | spin_unlock_irqrestore(&bp->lock, flags); | |
272 | if (!ccr) | |
273 | return; | |
a72492bd | 274 | udelay(1); |
1da177e4 | 275 | } |
d61780c0 | 276 | |
1da177e4 LT |
277 | printk(KERN_ERR "sx%d: Timeout waiting for CCR.\n", board_No(bp)); |
278 | } | |
279 | ||
280 | ||
281 | /* Wait for Channel Command Register ready */ | |
d2fbd0f2 | 282 | static void sx_wait_CCR_off(struct specialix_board *bp) |
1da177e4 LT |
283 | { |
284 | unsigned long delay; | |
285 | unsigned char crr; | |
286 | unsigned long flags; | |
287 | ||
288 | for (delay = SX_CCR_TIMEOUT; delay; delay--) { | |
289 | spin_lock_irqsave(&bp->lock, flags); | |
290 | crr = sx_in_off(bp, CD186x_CCR); | |
291 | spin_unlock_irqrestore(&bp->lock, flags); | |
292 | if (!crr) | |
293 | return; | |
a72492bd | 294 | udelay(1); |
1da177e4 | 295 | } |
d61780c0 | 296 | |
1da177e4 LT |
297 | printk(KERN_ERR "sx%d: Timeout waiting for CCR.\n", board_No(bp)); |
298 | } | |
299 | ||
300 | ||
301 | /* | |
302 | * specialix IO8+ IO range functions. | |
303 | */ | |
304 | ||
d2fbd0f2 | 305 | static int sx_request_io_range(struct specialix_board *bp) |
1da177e4 | 306 | { |
d61780c0 JG |
307 | return request_region(bp->base, |
308 | bp->flags & SX_BOARD_IS_PCI ? SX_PCI_IO_SPACE : SX_IO_SPACE, | |
309 | "specialix IO8+") == NULL; | |
1da177e4 LT |
310 | } |
311 | ||
312 | ||
d2fbd0f2 | 313 | static void sx_release_io_range(struct specialix_board *bp) |
1da177e4 | 314 | { |
a72492bd AC |
315 | release_region(bp->base, bp->flags & SX_BOARD_IS_PCI ? |
316 | SX_PCI_IO_SPACE : SX_IO_SPACE); | |
1da177e4 LT |
317 | } |
318 | ||
d61780c0 | 319 | |
1da177e4 | 320 | /* Set the IRQ using the RTS lines that run to the PAL on the board.... */ |
a72492bd | 321 | static int sx_set_irq(struct specialix_board *bp) |
1da177e4 LT |
322 | { |
323 | int virq; | |
324 | int i; | |
325 | unsigned long flags; | |
326 | ||
d61780c0 | 327 | if (bp->flags & SX_BOARD_IS_PCI) |
1da177e4 LT |
328 | return 1; |
329 | switch (bp->irq) { | |
330 | /* In the same order as in the docs... */ | |
a72492bd AC |
331 | case 15: |
332 | virq = 0; | |
333 | break; | |
334 | case 12: | |
335 | virq = 1; | |
336 | break; | |
337 | case 11: | |
338 | virq = 2; | |
339 | break; | |
340 | case 9: | |
341 | virq = 3; | |
342 | break; | |
343 | default:printk(KERN_ERR | |
344 | "Speclialix: cannot set irq to %d.\n", bp->irq); | |
345 | return 0; | |
1da177e4 LT |
346 | } |
347 | spin_lock_irqsave(&bp->lock, flags); | |
a72492bd | 348 | for (i = 0; i < 2; i++) { |
1da177e4 LT |
349 | sx_out(bp, CD186x_CAR, i); |
350 | sx_out(bp, CD186x_MSVRTS, ((virq >> i) & 0x1)? MSVR_RTS:0); | |
351 | } | |
352 | spin_unlock_irqrestore(&bp->lock, flags); | |
353 | return 1; | |
354 | } | |
355 | ||
356 | ||
357 | /* Reset and setup CD186x chip */ | |
a72492bd | 358 | static int sx_init_CD186x(struct specialix_board *bp) |
1da177e4 LT |
359 | { |
360 | unsigned long flags; | |
361 | int scaler; | |
362 | int rv = 1; | |
363 | ||
364 | func_enter(); | |
365 | sx_wait_CCR_off(bp); /* Wait for CCR ready */ | |
366 | spin_lock_irqsave(&bp->lock, flags); | |
367 | sx_out_off(bp, CD186x_CCR, CCR_HARDRESET); /* Reset CD186x chip */ | |
368 | spin_unlock_irqrestore(&bp->lock, flags); | |
3e98cee7 | 369 | msleep(50); /* Delay 0.05 sec */ |
1da177e4 LT |
370 | spin_lock_irqsave(&bp->lock, flags); |
371 | sx_out_off(bp, CD186x_GIVR, SX_ID); /* Set ID for this chip */ | |
372 | sx_out_off(bp, CD186x_GICR, 0); /* Clear all bits */ | |
373 | sx_out_off(bp, CD186x_PILR1, SX_ACK_MINT); /* Prio for modem intr */ | |
374 | sx_out_off(bp, CD186x_PILR2, SX_ACK_TINT); /* Prio for transmitter intr */ | |
375 | sx_out_off(bp, CD186x_PILR3, SX_ACK_RINT); /* Prio for receiver intr */ | |
376 | /* Set RegAckEn */ | |
a72492bd | 377 | sx_out_off(bp, CD186x_SRCR, sx_in(bp, CD186x_SRCR) | SRCR_REGACKEN); |
d61780c0 | 378 | |
1da177e4 LT |
379 | /* Setting up prescaler. We need 4 ticks per 1 ms */ |
380 | scaler = SX_OSCFREQ/SPECIALIX_TPS; | |
381 | ||
382 | sx_out_off(bp, CD186x_PPRH, scaler >> 8); | |
383 | sx_out_off(bp, CD186x_PPRL, scaler & 0xff); | |
384 | spin_unlock_irqrestore(&bp->lock, flags); | |
385 | ||
a72492bd | 386 | if (!sx_set_irq(bp)) { |
1da177e4 | 387 | /* Figure out how to pass this along... */ |
a72492bd | 388 | printk(KERN_ERR "Cannot set irq to %d.\n", bp->irq); |
1da177e4 LT |
389 | rv = 0; |
390 | } | |
391 | ||
392 | func_exit(); | |
393 | return rv; | |
394 | } | |
395 | ||
396 | ||
a72492bd | 397 | static int read_cross_byte(struct specialix_board *bp, int reg, int bit) |
1da177e4 LT |
398 | { |
399 | int i; | |
400 | int t; | |
401 | unsigned long flags; | |
402 | ||
403 | spin_lock_irqsave(&bp->lock, flags); | |
a72492bd AC |
404 | for (i = 0, t = 0; i < 8; i++) { |
405 | sx_out_off(bp, CD186x_CAR, i); | |
406 | if (sx_in_off(bp, reg) & bit) | |
1da177e4 LT |
407 | t |= 1 << i; |
408 | } | |
409 | spin_unlock_irqrestore(&bp->lock, flags); | |
410 | ||
411 | return t; | |
412 | } | |
413 | ||
414 | ||
1da177e4 LT |
415 | /* Main probing routine, also sets irq. */ |
416 | static int sx_probe(struct specialix_board *bp) | |
417 | { | |
418 | unsigned char val1, val2; | |
1da177e4 LT |
419 | int rev; |
420 | int chip; | |
421 | ||
422 | func_enter(); | |
423 | ||
d61780c0 | 424 | if (sx_request_io_range(bp)) { |
1da177e4 LT |
425 | func_exit(); |
426 | return 1; | |
427 | } | |
428 | ||
429 | /* Are the I/O ports here ? */ | |
430 | sx_out_off(bp, CD186x_PPRL, 0x5a); | |
d2fbd0f2 | 431 | udelay(1); |
1da177e4 LT |
432 | val1 = sx_in_off(bp, CD186x_PPRL); |
433 | ||
434 | sx_out_off(bp, CD186x_PPRL, 0xa5); | |
d2fbd0f2 | 435 | udelay(1); |
1da177e4 LT |
436 | val2 = sx_in_off(bp, CD186x_PPRL); |
437 | ||
d61780c0 | 438 | |
d2fbd0f2 | 439 | if (val1 != 0x5a || val2 != 0xa5) { |
a72492bd AC |
440 | printk(KERN_INFO |
441 | "sx%d: specialix IO8+ Board at 0x%03x not found.\n", | |
442 | board_No(bp), bp->base); | |
d61780c0 | 443 | sx_release_io_range(bp); |
1da177e4 LT |
444 | func_exit(); |
445 | return 1; | |
446 | } | |
447 | ||
d61780c0 | 448 | /* Check the DSR lines that Specialix uses as board |
1da177e4 | 449 | identification */ |
a72492bd AC |
450 | val1 = read_cross_byte(bp, CD186x_MSVR, MSVR_DSR); |
451 | val2 = read_cross_byte(bp, CD186x_MSVR, MSVR_RTS); | |
452 | dprintk(SX_DEBUG_INIT, | |
453 | "sx%d: DSR lines are: %02x, rts lines are: %02x\n", | |
454 | board_No(bp), val1, val2); | |
1da177e4 LT |
455 | |
456 | /* They managed to switch the bit order between the docs and | |
457 | the IO8+ card. The new PCI card now conforms to old docs. | |
458 | They changed the PCI docs to reflect the situation on the | |
459 | old card. */ | |
460 | val2 = (bp->flags & SX_BOARD_IS_PCI)?0x4d : 0xb2; | |
461 | if (val1 != val2) { | |
a72492bd AC |
462 | printk(KERN_INFO |
463 | "sx%d: specialix IO8+ ID %02x at 0x%03x not found (%02x).\n", | |
1da177e4 | 464 | board_No(bp), val2, bp->base, val1); |
d61780c0 | 465 | sx_release_io_range(bp); |
1da177e4 LT |
466 | func_exit(); |
467 | return 1; | |
468 | } | |
469 | ||
470 | ||
1da177e4 LT |
471 | /* Reset CD186x again */ |
472 | if (!sx_init_CD186x(bp)) { | |
d61780c0 | 473 | sx_release_io_range(bp); |
1da177e4 | 474 | func_exit(); |
d61780c0 | 475 | return 1; |
1da177e4 LT |
476 | } |
477 | ||
478 | sx_request_io_range(bp); | |
479 | bp->flags |= SX_BOARD_PRESENT; | |
d61780c0 | 480 | |
1da177e4 | 481 | /* Chip revcode pkgtype |
a72492bd | 482 | GFRCR SRCR bit 7 |
1da177e4 LT |
483 | CD180 rev B 0x81 0 |
484 | CD180 rev C 0x82 0 | |
485 | CD1864 rev A 0x82 1 | |
d61780c0 | 486 | CD1865 rev A 0x83 1 -- Do not use!!! Does not work. |
1da177e4 LT |
487 | CD1865 rev B 0x84 1 |
488 | -- Thanks to Gwen Wang, Cirrus Logic. | |
489 | */ | |
490 | ||
491 | switch (sx_in_off(bp, CD186x_GFRCR)) { | |
a72492bd AC |
492 | case 0x82: |
493 | chip = 1864; | |
494 | rev = 'A'; | |
495 | break; | |
496 | case 0x83: | |
497 | chip = 1865; | |
498 | rev = 'A'; | |
499 | break; | |
500 | case 0x84: | |
501 | chip = 1865; | |
502 | rev = 'B'; | |
503 | break; | |
504 | case 0x85: | |
505 | chip = 1865; | |
506 | rev = 'C'; | |
507 | break; /* Does not exist at this time */ | |
508 | default: | |
509 | chip = -1; | |
510 | rev = 'x'; | |
1da177e4 LT |
511 | } |
512 | ||
a72492bd | 513 | dprintk(SX_DEBUG_INIT, " GFCR = 0x%02x\n", sx_in_off(bp, CD186x_GFRCR)); |
1da177e4 | 514 | |
a72492bd AC |
515 | printk(KERN_INFO |
516 | "sx%d: specialix IO8+ board detected at 0x%03x, IRQ %d, CD%d Rev. %c.\n", | |
517 | board_No(bp), bp->base, bp->irq, chip, rev); | |
1da177e4 LT |
518 | |
519 | func_exit(); | |
520 | return 0; | |
521 | } | |
522 | ||
d61780c0 JG |
523 | /* |
524 | * | |
1da177e4 LT |
525 | * Interrupt processing routines. |
526 | * */ | |
527 | ||
d2fbd0f2 | 528 | static struct specialix_port *sx_get_port(struct specialix_board *bp, |
a72492bd | 529 | unsigned char const *what) |
1da177e4 LT |
530 | { |
531 | unsigned char channel; | |
a72492bd | 532 | struct specialix_port *port = NULL; |
1da177e4 LT |
533 | |
534 | channel = sx_in(bp, CD186x_GICR) >> GICR_CHAN_OFF; | |
a72492bd | 535 | dprintk(SX_DEBUG_CHAN, "channel: %d\n", channel); |
1da177e4 LT |
536 | if (channel < CD186x_NCH) { |
537 | port = &sx_port[board_No(bp) * SX_NPORT + channel]; | |
a72492bd AC |
538 | dprintk(SX_DEBUG_CHAN, "port: %d %p flags: 0x%lx\n", |
539 | board_No(bp) * SX_NPORT + channel, port, | |
540 | port->port.flags & ASYNC_INITIALIZED); | |
1da177e4 | 541 | |
44b7d1b3 | 542 | if (port->port.flags & ASYNC_INITIALIZED) { |
a72492bd | 543 | dprintk(SX_DEBUG_CHAN, "port: %d %p\n", channel, port); |
1da177e4 LT |
544 | func_exit(); |
545 | return port; | |
546 | } | |
547 | } | |
d61780c0 | 548 | printk(KERN_INFO "sx%d: %s interrupt from invalid port %d\n", |
1da177e4 LT |
549 | board_No(bp), what, channel); |
550 | return NULL; | |
551 | } | |
552 | ||
553 | ||
d2fbd0f2 | 554 | static void sx_receive_exc(struct specialix_board *bp) |
1da177e4 LT |
555 | { |
556 | struct specialix_port *port; | |
557 | struct tty_struct *tty; | |
558 | unsigned char status; | |
33f0f88f | 559 | unsigned char ch, flag; |
1da177e4 LT |
560 | |
561 | func_enter(); | |
562 | ||
563 | port = sx_get_port(bp, "Receive"); | |
564 | if (!port) { | |
a72492bd | 565 | dprintk(SX_DEBUG_RX, "Hmm, couldn't find port.\n"); |
1da177e4 LT |
566 | func_exit(); |
567 | return; | |
568 | } | |
44b7d1b3 | 569 | tty = port->port.tty; |
d61780c0 | 570 | |
1da177e4 LT |
571 | status = sx_in(bp, CD186x_RCSR); |
572 | ||
a72492bd | 573 | dprintk(SX_DEBUG_RX, "status: 0x%x\n", status); |
1da177e4 LT |
574 | if (status & RCSR_OE) { |
575 | port->overrun++; | |
a72492bd AC |
576 | dprintk(SX_DEBUG_FIFO, |
577 | "sx%d: port %d: Overrun. Total %ld overruns.\n", | |
578 | board_No(bp), port_No(port), port->overrun); | |
1da177e4 LT |
579 | } |
580 | status &= port->mark_mask; | |
581 | ||
582 | /* This flip buffer check needs to be below the reading of the | |
583 | status register to reset the chip's IRQ.... */ | |
33f0f88f | 584 | if (tty_buffer_request_room(tty, 1) == 0) { |
a72492bd AC |
585 | dprintk(SX_DEBUG_FIFO, |
586 | "sx%d: port %d: Working around flip buffer overflow.\n", | |
587 | board_No(bp), port_No(port)); | |
1da177e4 LT |
588 | func_exit(); |
589 | return; | |
590 | } | |
591 | ||
592 | ch = sx_in(bp, CD186x_RDR); | |
593 | if (!status) { | |
594 | func_exit(); | |
595 | return; | |
596 | } | |
597 | if (status & RCSR_TOUT) { | |
a72492bd AC |
598 | printk(KERN_INFO |
599 | "sx%d: port %d: Receiver timeout. Hardware problems ?\n", | |
600 | board_No(bp), port_No(port)); | |
1da177e4 LT |
601 | func_exit(); |
602 | return; | |
d61780c0 | 603 | |
1da177e4 LT |
604 | } else if (status & RCSR_BREAK) { |
605 | dprintk(SX_DEBUG_RX, "sx%d: port %d: Handling break...\n", | |
606 | board_No(bp), port_No(port)); | |
33f0f88f | 607 | flag = TTY_BREAK; |
44b7d1b3 | 608 | if (port->port.flags & ASYNC_SAK) |
1da177e4 | 609 | do_SAK(tty); |
d61780c0 JG |
610 | |
611 | } else if (status & RCSR_PE) | |
33f0f88f | 612 | flag = TTY_PARITY; |
d61780c0 JG |
613 | |
614 | else if (status & RCSR_FE) | |
33f0f88f | 615 | flag = TTY_FRAME; |
d61780c0 | 616 | |
1da177e4 | 617 | else if (status & RCSR_OE) |
33f0f88f | 618 | flag = TTY_OVERRUN; |
d61780c0 | 619 | |
1da177e4 | 620 | else |
33f0f88f | 621 | flag = TTY_NORMAL; |
1da177e4 | 622 | |
a72492bd | 623 | if (tty_insert_flip_char(tty, ch, flag)) |
33f0f88f | 624 | tty_flip_buffer_push(tty); |
1da177e4 LT |
625 | func_exit(); |
626 | } | |
627 | ||
628 | ||
d2fbd0f2 | 629 | static void sx_receive(struct specialix_board *bp) |
1da177e4 LT |
630 | { |
631 | struct specialix_port *port; | |
632 | struct tty_struct *tty; | |
633 | unsigned char count; | |
634 | ||
635 | func_enter(); | |
d61780c0 | 636 | |
a72492bd AC |
637 | port = sx_get_port(bp, "Receive"); |
638 | if (port == NULL) { | |
639 | dprintk(SX_DEBUG_RX, "Hmm, couldn't find port.\n"); | |
1da177e4 LT |
640 | func_exit(); |
641 | return; | |
642 | } | |
44b7d1b3 | 643 | tty = port->port.tty; |
d61780c0 | 644 | |
1da177e4 | 645 | count = sx_in(bp, CD186x_RDCR); |
a72492bd | 646 | dprintk(SX_DEBUG_RX, "port: %p: count: %d\n", port, count); |
1da177e4 | 647 | port->hits[count > 8 ? 9 : count]++; |
d61780c0 | 648 | |
33f0f88f AC |
649 | while (count--) |
650 | tty_insert_flip_char(tty, sx_in(bp, CD186x_RDR), TTY_NORMAL); | |
651 | tty_flip_buffer_push(tty); | |
1da177e4 LT |
652 | func_exit(); |
653 | } | |
654 | ||
655 | ||
d2fbd0f2 | 656 | static void sx_transmit(struct specialix_board *bp) |
1da177e4 LT |
657 | { |
658 | struct specialix_port *port; | |
659 | struct tty_struct *tty; | |
660 | unsigned char count; | |
661 | ||
662 | func_enter(); | |
a72492bd AC |
663 | port = sx_get_port(bp, "Transmit"); |
664 | if (port == NULL) { | |
1da177e4 LT |
665 | func_exit(); |
666 | return; | |
667 | } | |
a72492bd | 668 | dprintk(SX_DEBUG_TX, "port: %p\n", port); |
44b7d1b3 | 669 | tty = port->port.tty; |
d61780c0 | 670 | |
1da177e4 LT |
671 | if (port->IER & IER_TXEMPTY) { |
672 | /* FIFO drained */ | |
673 | sx_out(bp, CD186x_CAR, port_No(port)); | |
674 | port->IER &= ~IER_TXEMPTY; | |
675 | sx_out(bp, CD186x_IER, port->IER); | |
676 | func_exit(); | |
677 | return; | |
678 | } | |
d61780c0 | 679 | |
1da177e4 LT |
680 | if ((port->xmit_cnt <= 0 && !port->break_length) |
681 | || tty->stopped || tty->hw_stopped) { | |
682 | sx_out(bp, CD186x_CAR, port_No(port)); | |
683 | port->IER &= ~IER_TXRDY; | |
684 | sx_out(bp, CD186x_IER, port->IER); | |
685 | func_exit(); | |
686 | return; | |
687 | } | |
d61780c0 | 688 | |
1da177e4 LT |
689 | if (port->break_length) { |
690 | if (port->break_length > 0) { | |
691 | if (port->COR2 & COR2_ETC) { | |
692 | sx_out(bp, CD186x_TDR, CD186x_C_ESC); | |
693 | sx_out(bp, CD186x_TDR, CD186x_C_SBRK); | |
694 | port->COR2 &= ~COR2_ETC; | |
695 | } | |
696 | count = min_t(int, port->break_length, 0xff); | |
697 | sx_out(bp, CD186x_TDR, CD186x_C_ESC); | |
698 | sx_out(bp, CD186x_TDR, CD186x_C_DELAY); | |
699 | sx_out(bp, CD186x_TDR, count); | |
a72492bd AC |
700 | port->break_length -= count; |
701 | if (port->break_length == 0) | |
1da177e4 LT |
702 | port->break_length--; |
703 | } else { | |
704 | sx_out(bp, CD186x_TDR, CD186x_C_ESC); | |
705 | sx_out(bp, CD186x_TDR, CD186x_C_EBRK); | |
706 | sx_out(bp, CD186x_COR2, port->COR2); | |
707 | sx_wait_CCR(bp); | |
708 | sx_out(bp, CD186x_CCR, CCR_CORCHG2); | |
709 | port->break_length = 0; | |
710 | } | |
711 | ||
712 | func_exit(); | |
713 | return; | |
714 | } | |
d61780c0 | 715 | |
1da177e4 LT |
716 | count = CD186x_NFIFO; |
717 | do { | |
718 | sx_out(bp, CD186x_TDR, port->xmit_buf[port->xmit_tail++]); | |
719 | port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1); | |
720 | if (--port->xmit_cnt <= 0) | |
721 | break; | |
722 | } while (--count > 0); | |
d61780c0 | 723 | |
1da177e4 LT |
724 | if (port->xmit_cnt <= 0) { |
725 | sx_out(bp, CD186x_CAR, port_No(port)); | |
726 | port->IER &= ~IER_TXRDY; | |
727 | sx_out(bp, CD186x_IER, port->IER); | |
728 | } | |
729 | if (port->xmit_cnt <= port->wakeup_chars) | |
a72492bd | 730 | tty_wakeup(tty); |
1da177e4 LT |
731 | |
732 | func_exit(); | |
733 | } | |
734 | ||
735 | ||
d2fbd0f2 | 736 | static void sx_check_modem(struct specialix_board *bp) |
1da177e4 LT |
737 | { |
738 | struct specialix_port *port; | |
739 | struct tty_struct *tty; | |
740 | unsigned char mcr; | |
741 | int msvr_cd; | |
742 | ||
a72492bd AC |
743 | dprintk(SX_DEBUG_SIGNALS, "Modem intr. "); |
744 | port = sx_get_port(bp, "Modem"); | |
745 | if (port == NULL) | |
1da177e4 | 746 | return; |
d61780c0 | 747 | |
44b7d1b3 | 748 | tty = port->port.tty; |
d61780c0 | 749 | |
1da177e4 | 750 | mcr = sx_in(bp, CD186x_MCR); |
1da177e4 LT |
751 | |
752 | if ((mcr & MCR_CDCHG)) { | |
a72492bd | 753 | dprintk(SX_DEBUG_SIGNALS, "CD just changed... "); |
1da177e4 LT |
754 | msvr_cd = sx_in(bp, CD186x_MSVR) & MSVR_CD; |
755 | if (msvr_cd) { | |
a72492bd | 756 | dprintk(SX_DEBUG_SIGNALS, "Waking up guys in open.\n"); |
44b7d1b3 | 757 | wake_up_interruptible(&port->port.open_wait); |
1da177e4 | 758 | } else { |
a72492bd | 759 | dprintk(SX_DEBUG_SIGNALS, "Sending HUP.\n"); |
d0d4e1c0 | 760 | tty_hangup(tty); |
1da177e4 LT |
761 | } |
762 | } | |
d61780c0 | 763 | |
1da177e4 LT |
764 | #ifdef SPECIALIX_BRAIN_DAMAGED_CTS |
765 | if (mcr & MCR_CTSCHG) { | |
766 | if (sx_in(bp, CD186x_MSVR) & MSVR_CTS) { | |
767 | tty->hw_stopped = 0; | |
768 | port->IER |= IER_TXRDY; | |
769 | if (port->xmit_cnt <= port->wakeup_chars) | |
d0d4e1c0 | 770 | tty_wakeup(tty); |
1da177e4 LT |
771 | } else { |
772 | tty->hw_stopped = 1; | |
773 | port->IER &= ~IER_TXRDY; | |
774 | } | |
775 | sx_out(bp, CD186x_IER, port->IER); | |
776 | } | |
777 | if (mcr & MCR_DSSXHG) { | |
778 | if (sx_in(bp, CD186x_MSVR) & MSVR_DSR) { | |
779 | tty->hw_stopped = 0; | |
780 | port->IER |= IER_TXRDY; | |
781 | if (port->xmit_cnt <= port->wakeup_chars) | |
d0d4e1c0 | 782 | tty_wakeup(tty); |
1da177e4 LT |
783 | } else { |
784 | tty->hw_stopped = 1; | |
785 | port->IER &= ~IER_TXRDY; | |
786 | } | |
787 | sx_out(bp, CD186x_IER, port->IER); | |
788 | } | |
789 | #endif /* SPECIALIX_BRAIN_DAMAGED_CTS */ | |
d61780c0 | 790 | |
1da177e4 LT |
791 | /* Clear change bits */ |
792 | sx_out(bp, CD186x_MCR, 0); | |
793 | } | |
794 | ||
795 | ||
796 | /* The main interrupt processing routine */ | |
a6f97b29 | 797 | static irqreturn_t sx_interrupt(int dummy, void *dev_id) |
1da177e4 LT |
798 | { |
799 | unsigned char status; | |
800 | unsigned char ack; | |
a6f97b29 | 801 | struct specialix_board *bp = dev_id; |
1da177e4 LT |
802 | unsigned long loop = 0; |
803 | int saved_reg; | |
804 | unsigned long flags; | |
805 | ||
806 | func_enter(); | |
807 | ||
1da177e4 LT |
808 | spin_lock_irqsave(&bp->lock, flags); |
809 | ||
a72492bd AC |
810 | dprintk(SX_DEBUG_FLOW, "enter %s port %d room: %ld\n", __func__, |
811 | port_No(sx_get_port(bp, "INT")), | |
812 | SERIAL_XMIT_SIZE - sx_get_port(bp, "ITN")->xmit_cnt - 1); | |
c7bec5ab | 813 | if (!(bp->flags & SX_BOARD_ACTIVE)) { |
a72492bd AC |
814 | dprintk(SX_DEBUG_IRQ, "sx: False interrupt. irq %d.\n", |
815 | bp->irq); | |
1da177e4 LT |
816 | spin_unlock_irqrestore(&bp->lock, flags); |
817 | func_exit(); | |
818 | return IRQ_NONE; | |
819 | } | |
820 | ||
821 | saved_reg = bp->reg; | |
822 | ||
a72492bd AC |
823 | while (++loop < 16) { |
824 | status = sx_in(bp, CD186x_SRSR) & | |
825 | (SRSR_RREQint | SRSR_TREQint | SRSR_MREQint); | |
826 | if (status == 0) | |
827 | break; | |
1da177e4 LT |
828 | if (status & SRSR_RREQint) { |
829 | ack = sx_in(bp, CD186x_RRAR); | |
830 | ||
831 | if (ack == (SX_ID | GIVR_IT_RCV)) | |
832 | sx_receive(bp); | |
833 | else if (ack == (SX_ID | GIVR_IT_REXC)) | |
834 | sx_receive_exc(bp); | |
835 | else | |
a72492bd AC |
836 | printk(KERN_ERR |
837 | "sx%d: status: 0x%x Bad receive ack 0x%02x.\n", | |
838 | board_No(bp), status, ack); | |
d61780c0 | 839 | |
1da177e4 LT |
840 | } else if (status & SRSR_TREQint) { |
841 | ack = sx_in(bp, CD186x_TRAR); | |
842 | ||
843 | if (ack == (SX_ID | GIVR_IT_TX)) | |
844 | sx_transmit(bp); | |
845 | else | |
846 | printk(KERN_ERR "sx%d: status: 0x%x Bad transmit ack 0x%02x. port: %d\n", | |
a72492bd AC |
847 | board_No(bp), status, ack, |
848 | port_No(sx_get_port(bp, "Int"))); | |
1da177e4 LT |
849 | } else if (status & SRSR_MREQint) { |
850 | ack = sx_in(bp, CD186x_MRAR); | |
851 | ||
d61780c0 | 852 | if (ack == (SX_ID | GIVR_IT_MODEM)) |
1da177e4 LT |
853 | sx_check_modem(bp); |
854 | else | |
a72492bd AC |
855 | printk(KERN_ERR |
856 | "sx%d: status: 0x%x Bad modem ack 0x%02x.\n", | |
1da177e4 | 857 | board_No(bp), status, ack); |
d61780c0 JG |
858 | |
859 | } | |
1da177e4 LT |
860 | |
861 | sx_out(bp, CD186x_EOIR, 0); /* Mark end of interrupt */ | |
862 | } | |
863 | bp->reg = saved_reg; | |
a72492bd | 864 | outb(bp->reg, bp->base + SX_ADDR_REG); |
1da177e4 LT |
865 | spin_unlock_irqrestore(&bp->lock, flags); |
866 | func_exit(); | |
867 | return IRQ_HANDLED; | |
868 | } | |
869 | ||
870 | ||
871 | /* | |
872 | * Routines for open & close processing. | |
873 | */ | |
874 | ||
a72492bd | 875 | static void turn_ints_off(struct specialix_board *bp) |
1da177e4 LT |
876 | { |
877 | unsigned long flags; | |
878 | ||
879 | func_enter(); | |
1da177e4 | 880 | spin_lock_irqsave(&bp->lock, flags); |
a72492bd | 881 | (void) sx_in_off(bp, 0); /* Turn off interrupts. */ |
1da177e4 LT |
882 | spin_unlock_irqrestore(&bp->lock, flags); |
883 | ||
884 | func_exit(); | |
885 | } | |
886 | ||
a72492bd | 887 | static void turn_ints_on(struct specialix_board *bp) |
1da177e4 LT |
888 | { |
889 | unsigned long flags; | |
890 | ||
891 | func_enter(); | |
892 | ||
1da177e4 | 893 | spin_lock_irqsave(&bp->lock, flags); |
a72492bd | 894 | (void) sx_in(bp, 0); /* Turn ON interrupts. */ |
1da177e4 LT |
895 | spin_unlock_irqrestore(&bp->lock, flags); |
896 | ||
897 | func_exit(); | |
898 | } | |
899 | ||
900 | ||
901 | /* Called with disabled interrupts */ | |
d2fbd0f2 | 902 | static int sx_setup_board(struct specialix_board *bp) |
1da177e4 LT |
903 | { |
904 | int error; | |
905 | ||
d61780c0 | 906 | if (bp->flags & SX_BOARD_ACTIVE) |
1da177e4 LT |
907 | return 0; |
908 | ||
909 | if (bp->flags & SX_BOARD_IS_PCI) | |
a72492bd AC |
910 | error = request_irq(bp->irq, sx_interrupt, |
911 | IRQF_DISABLED | IRQF_SHARED, "specialix IO8+", bp); | |
1da177e4 | 912 | else |
a72492bd AC |
913 | error = request_irq(bp->irq, sx_interrupt, |
914 | IRQF_DISABLED, "specialix IO8+", bp); | |
1da177e4 | 915 | |
d61780c0 | 916 | if (error) |
1da177e4 LT |
917 | return error; |
918 | ||
a72492bd | 919 | turn_ints_on(bp); |
1da177e4 LT |
920 | bp->flags |= SX_BOARD_ACTIVE; |
921 | ||
922 | return 0; | |
923 | } | |
924 | ||
925 | ||
926 | /* Called with disabled interrupts */ | |
d2fbd0f2 | 927 | static void sx_shutdown_board(struct specialix_board *bp) |
1da177e4 LT |
928 | { |
929 | func_enter(); | |
930 | ||
931 | if (!(bp->flags & SX_BOARD_ACTIVE)) { | |
932 | func_exit(); | |
933 | return; | |
934 | } | |
935 | ||
936 | bp->flags &= ~SX_BOARD_ACTIVE; | |
d61780c0 | 937 | |
a72492bd AC |
938 | dprintk(SX_DEBUG_IRQ, "Freeing IRQ%d for board %d.\n", |
939 | bp->irq, board_No(bp)); | |
1da177e4 | 940 | free_irq(bp->irq, bp); |
a72492bd | 941 | turn_ints_off(bp); |
1da177e4 LT |
942 | func_exit(); |
943 | } | |
944 | ||
d2fbd0f2 AC |
945 | static unsigned int sx_crtscts(struct tty_struct *tty) |
946 | { | |
947 | if (sx_rtscts) | |
948 | return C_CRTSCTS(tty); | |
949 | return 1; | |
950 | } | |
1da177e4 LT |
951 | |
952 | /* | |
d61780c0 | 953 | * Setting up port characteristics. |
1da177e4 LT |
954 | * Must be called with disabled interrupts |
955 | */ | |
a72492bd AC |
956 | static void sx_change_speed(struct specialix_board *bp, |
957 | struct specialix_port *port) | |
1da177e4 LT |
958 | { |
959 | struct tty_struct *tty; | |
960 | unsigned long baud; | |
961 | long tmp; | |
962 | unsigned char cor1 = 0, cor3 = 0; | |
963 | unsigned char mcor1 = 0, mcor2 = 0; | |
964 | static unsigned long again; | |
965 | unsigned long flags; | |
966 | ||
967 | func_enter(); | |
968 | ||
a72492bd AC |
969 | tty = port->port.tty; |
970 | if (!tty || !tty->termios) { | |
1da177e4 LT |
971 | func_exit(); |
972 | return; | |
973 | } | |
974 | ||
975 | port->IER = 0; | |
976 | port->COR2 = 0; | |
977 | /* Select port on the board */ | |
978 | spin_lock_irqsave(&bp->lock, flags); | |
979 | sx_out(bp, CD186x_CAR, port_No(port)); | |
980 | ||
981 | /* The Specialix board doens't implement the RTS lines. | |
982 | They are used to set the IRQ level. Don't touch them. */ | |
d2fbd0f2 | 983 | if (sx_crtscts(tty)) |
1da177e4 LT |
984 | port->MSVR = MSVR_DTR | (sx_in(bp, CD186x_MSVR) & MSVR_RTS); |
985 | else | |
986 | port->MSVR = (sx_in(bp, CD186x_MSVR) & MSVR_RTS); | |
987 | spin_unlock_irqrestore(&bp->lock, flags); | |
a72492bd | 988 | dprintk(SX_DEBUG_TERMIOS, "sx: got MSVR=%02x.\n", port->MSVR); |
67cc0161 | 989 | baud = tty_get_baud_rate(tty); |
d61780c0 | 990 | |
67cc0161 | 991 | if (baud == 38400) { |
44b7d1b3 | 992 | if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
a4bb2cf1 | 993 | baud = 57600; |
44b7d1b3 | 994 | if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
a4bb2cf1 | 995 | baud = 115200; |
1da177e4 | 996 | } |
d61780c0 | 997 | |
67cc0161 | 998 | if (!baud) { |
1da177e4 | 999 | /* Drop DTR & exit */ |
a72492bd | 1000 | dprintk(SX_DEBUG_TERMIOS, "Dropping DTR... Hmm....\n"); |
d2fbd0f2 | 1001 | if (!sx_crtscts(tty)) { |
a72492bd | 1002 | port->MSVR &= ~MSVR_DTR; |
1da177e4 | 1003 | spin_lock_irqsave(&bp->lock, flags); |
a72492bd | 1004 | sx_out(bp, CD186x_MSVR, port->MSVR); |
1da177e4 | 1005 | spin_unlock_irqrestore(&bp->lock, flags); |
a72492bd AC |
1006 | } else |
1007 | dprintk(SX_DEBUG_TERMIOS, "Can't drop DTR: no DTR.\n"); | |
1da177e4 LT |
1008 | return; |
1009 | } else { | |
1010 | /* Set DTR on */ | |
d2fbd0f2 | 1011 | if (!sx_crtscts(tty)) |
a72492bd | 1012 | port->MSVR |= MSVR_DTR; |
1da177e4 | 1013 | } |
d61780c0 | 1014 | |
1da177e4 | 1015 | /* |
d61780c0 | 1016 | * Now we must calculate some speed depended things |
1da177e4 LT |
1017 | */ |
1018 | ||
1019 | /* Set baud rate for port */ | |
1020 | tmp = port->custom_divisor ; | |
a72492bd AC |
1021 | if (tmp) |
1022 | printk(KERN_INFO | |
1023 | "sx%d: Using custom baud rate divisor %ld. \n" | |
1024 | "This is an untested option, please be careful.\n", | |
1025 | port_No(port), tmp); | |
1da177e4 | 1026 | else |
a72492bd AC |
1027 | tmp = (((SX_OSCFREQ + baud/2) / baud + CD186x_TPC/2) / |
1028 | CD186x_TPC); | |
1da177e4 | 1029 | |
a72492bd | 1030 | if (tmp < 0x10 && time_before(again, jiffies)) { |
1da177e4 LT |
1031 | again = jiffies + HZ * 60; |
1032 | /* Page 48 of version 2.0 of the CL-CD1865 databook */ | |
1033 | if (tmp >= 12) { | |
a72492bd AC |
1034 | printk(KERN_INFO "sx%d: Baud rate divisor is %ld. \n" |
1035 | "Performance degradation is possible.\n" | |
1036 | "Read specialix.txt for more info.\n", | |
1037 | port_No(port), tmp); | |
1da177e4 | 1038 | } else { |
a72492bd AC |
1039 | printk(KERN_INFO "sx%d: Baud rate divisor is %ld. \n" |
1040 | "Warning: overstressing Cirrus chip. This might not work.\n" | |
1041 | "Read specialix.txt for more info.\n", port_No(port), tmp); | |
1da177e4 LT |
1042 | } |
1043 | } | |
1044 | spin_lock_irqsave(&bp->lock, flags); | |
d61780c0 JG |
1045 | sx_out(bp, CD186x_RBPRH, (tmp >> 8) & 0xff); |
1046 | sx_out(bp, CD186x_TBPRH, (tmp >> 8) & 0xff); | |
1047 | sx_out(bp, CD186x_RBPRL, tmp & 0xff); | |
1da177e4 LT |
1048 | sx_out(bp, CD186x_TBPRL, tmp & 0xff); |
1049 | spin_unlock_irqrestore(&bp->lock, flags); | |
a4bb2cf1 | 1050 | if (port->custom_divisor) |
a72492bd AC |
1051 | baud = (SX_OSCFREQ + port->custom_divisor/2) / |
1052 | port->custom_divisor; | |
a4bb2cf1 | 1053 | baud = (baud + 5) / 10; /* Estimated CPS */ |
1da177e4 LT |
1054 | |
1055 | /* Two timer ticks seems enough to wakeup something like SLIP driver */ | |
d61780c0 | 1056 | tmp = ((baud + HZ/2) / HZ) * 2 - CD186x_NFIFO; |
1da177e4 LT |
1057 | port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ? |
1058 | SERIAL_XMIT_SIZE - 1 : tmp); | |
d61780c0 | 1059 | |
1da177e4 LT |
1060 | /* Receiver timeout will be transmission time for 1.5 chars */ |
1061 | tmp = (SPECIALIX_TPS + SPECIALIX_TPS/2 + baud/2) / baud; | |
1062 | tmp = (tmp > 0xff) ? 0xff : tmp; | |
1063 | spin_lock_irqsave(&bp->lock, flags); | |
1064 | sx_out(bp, CD186x_RTPR, tmp); | |
1065 | spin_unlock_irqrestore(&bp->lock, flags); | |
1066 | switch (C_CSIZE(tty)) { | |
a72492bd | 1067 | case CS5: |
1da177e4 LT |
1068 | cor1 |= COR1_5BITS; |
1069 | break; | |
a72492bd | 1070 | case CS6: |
1da177e4 LT |
1071 | cor1 |= COR1_6BITS; |
1072 | break; | |
a72492bd | 1073 | case CS7: |
1da177e4 LT |
1074 | cor1 |= COR1_7BITS; |
1075 | break; | |
a72492bd | 1076 | case CS8: |
1da177e4 LT |
1077 | cor1 |= COR1_8BITS; |
1078 | break; | |
1079 | } | |
d61780c0 JG |
1080 | |
1081 | if (C_CSTOPB(tty)) | |
1da177e4 | 1082 | cor1 |= COR1_2SB; |
d61780c0 | 1083 | |
1da177e4 LT |
1084 | cor1 |= COR1_IGNORE; |
1085 | if (C_PARENB(tty)) { | |
1086 | cor1 |= COR1_NORMPAR; | |
d61780c0 | 1087 | if (C_PARODD(tty)) |
1da177e4 | 1088 | cor1 |= COR1_ODDP; |
d61780c0 | 1089 | if (I_INPCK(tty)) |
1da177e4 LT |
1090 | cor1 &= ~COR1_IGNORE; |
1091 | } | |
1092 | /* Set marking of some errors */ | |
1093 | port->mark_mask = RCSR_OE | RCSR_TOUT; | |
d61780c0 | 1094 | if (I_INPCK(tty)) |
1da177e4 | 1095 | port->mark_mask |= RCSR_FE | RCSR_PE; |
d61780c0 | 1096 | if (I_BRKINT(tty) || I_PARMRK(tty)) |
1da177e4 | 1097 | port->mark_mask |= RCSR_BREAK; |
d61780c0 | 1098 | if (I_IGNPAR(tty)) |
1da177e4 LT |
1099 | port->mark_mask &= ~(RCSR_FE | RCSR_PE); |
1100 | if (I_IGNBRK(tty)) { | |
1101 | port->mark_mask &= ~RCSR_BREAK; | |
d61780c0 | 1102 | if (I_IGNPAR(tty)) |
1da177e4 LT |
1103 | /* Real raw mode. Ignore all */ |
1104 | port->mark_mask &= ~RCSR_OE; | |
1105 | } | |
1106 | /* Enable Hardware Flow Control */ | |
1107 | if (C_CRTSCTS(tty)) { | |
1108 | #ifdef SPECIALIX_BRAIN_DAMAGED_CTS | |
1109 | port->IER |= IER_DSR | IER_CTS; | |
1110 | mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD; | |
1111 | mcor2 |= MCOR2_DSROD | MCOR2_CTSOD; | |
1112 | spin_lock_irqsave(&bp->lock, flags); | |
a72492bd AC |
1113 | tty->hw_stopped = !(sx_in(bp, CD186x_MSVR) & |
1114 | (MSVR_CTS|MSVR_DSR)); | |
1da177e4 LT |
1115 | spin_unlock_irqrestore(&bp->lock, flags); |
1116 | #else | |
d61780c0 | 1117 | port->COR2 |= COR2_CTSAE; |
1da177e4 LT |
1118 | #endif |
1119 | } | |
1120 | /* Enable Software Flow Control. FIXME: I'm not sure about this */ | |
1121 | /* Some people reported that it works, but I still doubt it */ | |
1122 | if (I_IXON(tty)) { | |
1123 | port->COR2 |= COR2_TXIBE; | |
1124 | cor3 |= (COR3_FCT | COR3_SCDE); | |
1125 | if (I_IXANY(tty)) | |
1126 | port->COR2 |= COR2_IXM; | |
1127 | spin_lock_irqsave(&bp->lock, flags); | |
1128 | sx_out(bp, CD186x_SCHR1, START_CHAR(tty)); | |
1129 | sx_out(bp, CD186x_SCHR2, STOP_CHAR(tty)); | |
1130 | sx_out(bp, CD186x_SCHR3, START_CHAR(tty)); | |
1131 | sx_out(bp, CD186x_SCHR4, STOP_CHAR(tty)); | |
1132 | spin_unlock_irqrestore(&bp->lock, flags); | |
1133 | } | |
1134 | if (!C_CLOCAL(tty)) { | |
1135 | /* Enable CD check */ | |
1136 | port->IER |= IER_CD; | |
1137 | mcor1 |= MCOR1_CDZD; | |
1138 | mcor2 |= MCOR2_CDOD; | |
1139 | } | |
d61780c0 JG |
1140 | |
1141 | if (C_CREAD(tty)) | |
1da177e4 LT |
1142 | /* Enable receiver */ |
1143 | port->IER |= IER_RXD; | |
d61780c0 | 1144 | |
1da177e4 LT |
1145 | /* Set input FIFO size (1-8 bytes) */ |
1146 | cor3 |= sx_rxfifo; | |
1147 | /* Setting up CD186x channel registers */ | |
1148 | spin_lock_irqsave(&bp->lock, flags); | |
1149 | sx_out(bp, CD186x_COR1, cor1); | |
1150 | sx_out(bp, CD186x_COR2, port->COR2); | |
1151 | sx_out(bp, CD186x_COR3, cor3); | |
1152 | spin_unlock_irqrestore(&bp->lock, flags); | |
1153 | /* Make CD186x know about registers change */ | |
1154 | sx_wait_CCR(bp); | |
1155 | spin_lock_irqsave(&bp->lock, flags); | |
1156 | sx_out(bp, CD186x_CCR, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3); | |
1157 | /* Setting up modem option registers */ | |
a72492bd AC |
1158 | dprintk(SX_DEBUG_TERMIOS, "Mcor1 = %02x, mcor2 = %02x.\n", |
1159 | mcor1, mcor2); | |
1da177e4 LT |
1160 | sx_out(bp, CD186x_MCOR1, mcor1); |
1161 | sx_out(bp, CD186x_MCOR2, mcor2); | |
1162 | spin_unlock_irqrestore(&bp->lock, flags); | |
1163 | /* Enable CD186x transmitter & receiver */ | |
1164 | sx_wait_CCR(bp); | |
1165 | spin_lock_irqsave(&bp->lock, flags); | |
1166 | sx_out(bp, CD186x_CCR, CCR_TXEN | CCR_RXEN); | |
1167 | /* Enable interrupts */ | |
1168 | sx_out(bp, CD186x_IER, port->IER); | |
1169 | /* And finally set the modem lines... */ | |
1170 | sx_out(bp, CD186x_MSVR, port->MSVR); | |
1171 | spin_unlock_irqrestore(&bp->lock, flags); | |
1172 | ||
1173 | func_exit(); | |
1174 | } | |
1175 | ||
1176 | ||
1177 | /* Must be called with interrupts enabled */ | |
a72492bd AC |
1178 | static int sx_setup_port(struct specialix_board *bp, |
1179 | struct specialix_port *port) | |
1da177e4 LT |
1180 | { |
1181 | unsigned long flags; | |
1182 | ||
1183 | func_enter(); | |
1184 | ||
44b7d1b3 | 1185 | if (port->port.flags & ASYNC_INITIALIZED) { |
1da177e4 LT |
1186 | func_exit(); |
1187 | return 0; | |
1188 | } | |
d61780c0 | 1189 | |
1da177e4 LT |
1190 | if (!port->xmit_buf) { |
1191 | /* We may sleep in get_zeroed_page() */ | |
1192 | unsigned long tmp; | |
d61780c0 | 1193 | |
a72492bd AC |
1194 | tmp = get_zeroed_page(GFP_KERNEL); |
1195 | if (tmp == 0L) { | |
1da177e4 LT |
1196 | func_exit(); |
1197 | return -ENOMEM; | |
1198 | } | |
1199 | ||
1200 | if (port->xmit_buf) { | |
1201 | free_page(tmp); | |
1202 | func_exit(); | |
1203 | return -ERESTARTSYS; | |
1204 | } | |
1205 | port->xmit_buf = (unsigned char *) tmp; | |
1206 | } | |
d61780c0 | 1207 | |
1da177e4 LT |
1208 | spin_lock_irqsave(&port->lock, flags); |
1209 | ||
44b7d1b3 AC |
1210 | if (port->port.tty) |
1211 | clear_bit(TTY_IO_ERROR, &port->port.tty->flags); | |
1da177e4 LT |
1212 | |
1213 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; | |
1214 | sx_change_speed(bp, port); | |
44b7d1b3 | 1215 | port->port.flags |= ASYNC_INITIALIZED; |
1da177e4 LT |
1216 | |
1217 | spin_unlock_irqrestore(&port->lock, flags); | |
1218 | ||
d61780c0 | 1219 | |
1da177e4 LT |
1220 | func_exit(); |
1221 | return 0; | |
1222 | } | |
1223 | ||
1224 | ||
1225 | /* Must be called with interrupts disabled */ | |
a72492bd AC |
1226 | static void sx_shutdown_port(struct specialix_board *bp, |
1227 | struct specialix_port *port) | |
1da177e4 LT |
1228 | { |
1229 | struct tty_struct *tty; | |
1230 | int i; | |
1231 | unsigned long flags; | |
d61780c0 | 1232 | |
1da177e4 LT |
1233 | func_enter(); |
1234 | ||
44b7d1b3 | 1235 | if (!(port->port.flags & ASYNC_INITIALIZED)) { |
1da177e4 LT |
1236 | func_exit(); |
1237 | return; | |
1238 | } | |
d61780c0 | 1239 | |
1da177e4 | 1240 | if (sx_debug & SX_DEBUG_FIFO) { |
a72492bd AC |
1241 | dprintk(SX_DEBUG_FIFO, |
1242 | "sx%d: port %d: %ld overruns, FIFO hits [ ", | |
1243 | board_No(bp), port_No(port), port->overrun); | |
1244 | for (i = 0; i < 10; i++) | |
1da177e4 | 1245 | dprintk(SX_DEBUG_FIFO, "%ld ", port->hits[i]); |
1da177e4 LT |
1246 | dprintk(SX_DEBUG_FIFO, "].\n"); |
1247 | } | |
1248 | ||
1249 | if (port->xmit_buf) { | |
1250 | free_page((unsigned long) port->xmit_buf); | |
1251 | port->xmit_buf = NULL; | |
1252 | } | |
1253 | ||
1254 | /* Select port */ | |
1255 | spin_lock_irqsave(&bp->lock, flags); | |
1256 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1257 | ||
a72492bd AC |
1258 | tty = port->port.tty; |
1259 | if (tty == NULL || C_HUPCL(tty)) { | |
1da177e4 LT |
1260 | /* Drop DTR */ |
1261 | sx_out(bp, CD186x_MSVDTR, 0); | |
1262 | } | |
1263 | spin_unlock_irqrestore(&bp->lock, flags); | |
1264 | /* Reset port */ | |
1265 | sx_wait_CCR(bp); | |
1266 | spin_lock_irqsave(&bp->lock, flags); | |
1267 | sx_out(bp, CD186x_CCR, CCR_SOFTRESET); | |
1268 | /* Disable all interrupts from this port */ | |
1269 | port->IER = 0; | |
1270 | sx_out(bp, CD186x_IER, port->IER); | |
1271 | spin_unlock_irqrestore(&bp->lock, flags); | |
1272 | if (tty) | |
1273 | set_bit(TTY_IO_ERROR, &tty->flags); | |
44b7d1b3 | 1274 | port->port.flags &= ~ASYNC_INITIALIZED; |
d61780c0 JG |
1275 | |
1276 | if (!bp->count) | |
1da177e4 LT |
1277 | sx_shutdown_board(bp); |
1278 | func_exit(); | |
1279 | } | |
1280 | ||
d61780c0 | 1281 | |
a72492bd AC |
1282 | static int block_til_ready(struct tty_struct *tty, struct file *filp, |
1283 | struct specialix_port *port) | |
1da177e4 LT |
1284 | { |
1285 | DECLARE_WAITQUEUE(wait, current); | |
1286 | struct specialix_board *bp = port_Board(port); | |
1287 | int retval; | |
1288 | int do_clocal = 0; | |
1289 | int CD; | |
1290 | unsigned long flags; | |
1291 | ||
1292 | func_enter(); | |
1293 | ||
1294 | /* | |
1295 | * If the device is in the middle of being closed, then block | |
1296 | * until it's done, and then try again. | |
1297 | */ | |
44b7d1b3 AC |
1298 | if (tty_hung_up_p(filp) || port->port.flags & ASYNC_CLOSING) { |
1299 | interruptible_sleep_on(&port->port.close_wait); | |
1300 | if (port->port.flags & ASYNC_HUP_NOTIFY) { | |
1da177e4 LT |
1301 | func_exit(); |
1302 | return -EAGAIN; | |
1303 | } else { | |
1304 | func_exit(); | |
1305 | return -ERESTARTSYS; | |
1306 | } | |
1307 | } | |
d61780c0 | 1308 | |
1da177e4 LT |
1309 | /* |
1310 | * If non-blocking mode is set, or the port is not enabled, | |
1311 | * then make the check up front and then exit. | |
1312 | */ | |
1313 | if ((filp->f_flags & O_NONBLOCK) || | |
1314 | (tty->flags & (1 << TTY_IO_ERROR))) { | |
44b7d1b3 | 1315 | port->port.flags |= ASYNC_NORMAL_ACTIVE; |
1da177e4 LT |
1316 | func_exit(); |
1317 | return 0; | |
1318 | } | |
1319 | ||
1320 | if (C_CLOCAL(tty)) | |
1321 | do_clocal = 1; | |
1322 | ||
1323 | /* | |
1324 | * Block waiting for the carrier detect and the line to become | |
1325 | * free (i.e., not in use by the callout). While we are in | |
1326 | * this loop, info->count is dropped by one, so that | |
1327 | * rs_close() knows when to free things. We restore it upon | |
1328 | * exit, either normal or abnormal. | |
1329 | */ | |
1330 | retval = 0; | |
44b7d1b3 | 1331 | add_wait_queue(&port->port.open_wait, &wait); |
1da177e4 | 1332 | spin_lock_irqsave(&port->lock, flags); |
a72492bd | 1333 | if (!tty_hung_up_p(filp)) |
44b7d1b3 | 1334 | port->port.count--; |
1da177e4 | 1335 | spin_unlock_irqrestore(&port->lock, flags); |
44b7d1b3 | 1336 | port->port.blocked_open++; |
1da177e4 LT |
1337 | while (1) { |
1338 | spin_lock_irqsave(&bp->lock, flags); | |
1339 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1340 | CD = sx_in(bp, CD186x_MSVR) & MSVR_CD; | |
d2fbd0f2 | 1341 | if (sx_crtscts(tty)) { |
1da177e4 LT |
1342 | /* Activate RTS */ |
1343 | port->MSVR |= MSVR_DTR; /* WTF? */ | |
a72492bd | 1344 | sx_out(bp, CD186x_MSVR, port->MSVR); |
1da177e4 LT |
1345 | } else { |
1346 | /* Activate DTR */ | |
1347 | port->MSVR |= MSVR_DTR; | |
a72492bd | 1348 | sx_out(bp, CD186x_MSVR, port->MSVR); |
1da177e4 LT |
1349 | } |
1350 | spin_unlock_irqrestore(&bp->lock, flags); | |
1351 | set_current_state(TASK_INTERRUPTIBLE); | |
1352 | if (tty_hung_up_p(filp) || | |
44b7d1b3 AC |
1353 | !(port->port.flags & ASYNC_INITIALIZED)) { |
1354 | if (port->port.flags & ASYNC_HUP_NOTIFY) | |
1da177e4 LT |
1355 | retval = -EAGAIN; |
1356 | else | |
d61780c0 | 1357 | retval = -ERESTARTSYS; |
1da177e4 LT |
1358 | break; |
1359 | } | |
44b7d1b3 | 1360 | if (!(port->port.flags & ASYNC_CLOSING) && |
1da177e4 LT |
1361 | (do_clocal || CD)) |
1362 | break; | |
1363 | if (signal_pending(current)) { | |
1364 | retval = -ERESTARTSYS; | |
1365 | break; | |
1366 | } | |
1367 | schedule(); | |
1368 | } | |
1369 | ||
1370 | set_current_state(TASK_RUNNING); | |
44b7d1b3 | 1371 | remove_wait_queue(&port->port.open_wait, &wait); |
1da177e4 | 1372 | spin_lock_irqsave(&port->lock, flags); |
a72492bd | 1373 | if (!tty_hung_up_p(filp)) |
44b7d1b3 | 1374 | port->port.count++; |
44b7d1b3 | 1375 | port->port.blocked_open--; |
1da177e4 LT |
1376 | spin_unlock_irqrestore(&port->lock, flags); |
1377 | if (retval) { | |
1378 | func_exit(); | |
1379 | return retval; | |
1380 | } | |
1381 | ||
44b7d1b3 | 1382 | port->port.flags |= ASYNC_NORMAL_ACTIVE; |
1da177e4 LT |
1383 | func_exit(); |
1384 | return 0; | |
d61780c0 | 1385 | } |
1da177e4 LT |
1386 | |
1387 | ||
a72492bd | 1388 | static int sx_open(struct tty_struct *tty, struct file *filp) |
1da177e4 LT |
1389 | { |
1390 | int board; | |
1391 | int error; | |
a72492bd AC |
1392 | struct specialix_port *port; |
1393 | struct specialix_board *bp; | |
1da177e4 LT |
1394 | int i; |
1395 | unsigned long flags; | |
1396 | ||
1397 | func_enter(); | |
1398 | ||
1399 | board = SX_BOARD(tty->index); | |
1400 | ||
1401 | if (board >= SX_NBOARD || !(sx_board[board].flags & SX_BOARD_PRESENT)) { | |
1402 | func_exit(); | |
1403 | return -ENODEV; | |
1404 | } | |
d61780c0 | 1405 | |
1da177e4 LT |
1406 | bp = &sx_board[board]; |
1407 | port = sx_port + board * SX_NPORT + SX_PORT(tty->index); | |
1408 | port->overrun = 0; | |
1409 | for (i = 0; i < 10; i++) | |
a72492bd | 1410 | port->hits[i] = 0; |
1da177e4 | 1411 | |
a72492bd AC |
1412 | dprintk(SX_DEBUG_OPEN, |
1413 | "Board = %d, bp = %p, port = %p, portno = %d.\n", | |
1414 | board, bp, port, SX_PORT(tty->index)); | |
1da177e4 LT |
1415 | |
1416 | if (sx_paranoia_check(port, tty->name, "sx_open")) { | |
1417 | func_enter(); | |
1418 | return -ENODEV; | |
1419 | } | |
1420 | ||
a72492bd AC |
1421 | error = sx_setup_board(bp); |
1422 | if (error) { | |
1da177e4 LT |
1423 | func_exit(); |
1424 | return error; | |
1425 | } | |
1426 | ||
1427 | spin_lock_irqsave(&bp->lock, flags); | |
44b7d1b3 | 1428 | port->port.count++; |
1da177e4 LT |
1429 | bp->count++; |
1430 | tty->driver_data = port; | |
44b7d1b3 | 1431 | port->port.tty = tty; |
1da177e4 LT |
1432 | spin_unlock_irqrestore(&bp->lock, flags); |
1433 | ||
a72492bd AC |
1434 | error = sx_setup_port(bp, port); |
1435 | if (error) { | |
1da177e4 LT |
1436 | func_enter(); |
1437 | return error; | |
1438 | } | |
d61780c0 | 1439 | |
a72492bd AC |
1440 | error = block_til_ready(tty, filp, port); |
1441 | if (error) { | |
1da177e4 LT |
1442 | func_enter(); |
1443 | return error; | |
1444 | } | |
1445 | ||
1446 | func_exit(); | |
1447 | return 0; | |
1448 | } | |
1449 | ||
978e595f AC |
1450 | static void sx_flush_buffer(struct tty_struct *tty) |
1451 | { | |
c9f19e96 | 1452 | struct specialix_port *port = tty->driver_data; |
978e595f | 1453 | unsigned long flags; |
a72492bd | 1454 | struct specialix_board *bp; |
978e595f AC |
1455 | |
1456 | func_enter(); | |
1457 | ||
1458 | if (sx_paranoia_check(port, tty->name, "sx_flush_buffer")) { | |
1459 | func_exit(); | |
1460 | return; | |
1461 | } | |
1462 | ||
1463 | bp = port_Board(port); | |
1464 | spin_lock_irqsave(&port->lock, flags); | |
1465 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; | |
1466 | spin_unlock_irqrestore(&port->lock, flags); | |
1467 | tty_wakeup(tty); | |
1468 | ||
1469 | func_exit(); | |
1470 | } | |
1da177e4 | 1471 | |
a72492bd | 1472 | static void sx_close(struct tty_struct *tty, struct file *filp) |
1da177e4 | 1473 | { |
c9f19e96 | 1474 | struct specialix_port *port = tty->driver_data; |
1da177e4 LT |
1475 | struct specialix_board *bp; |
1476 | unsigned long flags; | |
1477 | unsigned long timeout; | |
d61780c0 | 1478 | |
1da177e4 LT |
1479 | func_enter(); |
1480 | if (!port || sx_paranoia_check(port, tty->name, "close")) { | |
1481 | func_exit(); | |
1482 | return; | |
1483 | } | |
1484 | spin_lock_irqsave(&port->lock, flags); | |
1485 | ||
1486 | if (tty_hung_up_p(filp)) { | |
1487 | spin_unlock_irqrestore(&port->lock, flags); | |
1488 | func_exit(); | |
1489 | return; | |
1490 | } | |
d61780c0 | 1491 | |
1da177e4 | 1492 | bp = port_Board(port); |
d2fbd0f2 | 1493 | if (tty->count == 1 && port->port.count != 1) { |
1da177e4 LT |
1494 | printk(KERN_ERR "sx%d: sx_close: bad port count;" |
1495 | " tty->count is 1, port count is %d\n", | |
44b7d1b3 AC |
1496 | board_No(bp), port->port.count); |
1497 | port->port.count = 1; | |
1da177e4 LT |
1498 | } |
1499 | ||
44b7d1b3 AC |
1500 | if (port->port.count > 1) { |
1501 | port->port.count--; | |
1da177e4 LT |
1502 | bp->count--; |
1503 | ||
1504 | spin_unlock_irqrestore(&port->lock, flags); | |
1505 | ||
1506 | func_exit(); | |
1507 | return; | |
1508 | } | |
44b7d1b3 | 1509 | port->port.flags |= ASYNC_CLOSING; |
1da177e4 | 1510 | /* |
d61780c0 | 1511 | * Now we wait for the transmit buffer to clear; and we notify |
1da177e4 LT |
1512 | * the line discipline to only process XON/XOFF characters. |
1513 | */ | |
1514 | tty->closing = 1; | |
1515 | spin_unlock_irqrestore(&port->lock, flags); | |
a72492bd AC |
1516 | dprintk(SX_DEBUG_OPEN, "Closing\n"); |
1517 | if (port->port.closing_wait != ASYNC_CLOSING_WAIT_NONE) | |
44b7d1b3 | 1518 | tty_wait_until_sent(tty, port->port.closing_wait); |
1da177e4 LT |
1519 | /* |
1520 | * At this point we stop accepting input. To do this, we | |
1521 | * disable the receive line status interrupts, and tell the | |
1522 | * interrupt driver to stop checking the data ready bit in the | |
1523 | * line status register. | |
1524 | */ | |
a72492bd | 1525 | dprintk(SX_DEBUG_OPEN, "Closed\n"); |
1da177e4 | 1526 | port->IER &= ~IER_RXD; |
44b7d1b3 | 1527 | if (port->port.flags & ASYNC_INITIALIZED) { |
1da177e4 LT |
1528 | port->IER &= ~IER_TXRDY; |
1529 | port->IER |= IER_TXEMPTY; | |
1530 | spin_lock_irqsave(&bp->lock, flags); | |
1531 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1532 | sx_out(bp, CD186x_IER, port->IER); | |
1533 | spin_unlock_irqrestore(&bp->lock, flags); | |
1534 | /* | |
1535 | * Before we drop DTR, make sure the UART transmitter | |
1536 | * has completely drained; this is especially | |
1537 | * important if there is a transmit FIFO! | |
1538 | */ | |
1539 | timeout = jiffies+HZ; | |
a72492bd AC |
1540 | while (port->IER & IER_TXEMPTY) { |
1541 | set_current_state(TASK_INTERRUPTIBLE); | |
1da177e4 LT |
1542 | msleep_interruptible(jiffies_to_msecs(port->timeout)); |
1543 | if (time_after(jiffies, timeout)) { | |
a72492bd | 1544 | printk(KERN_INFO "Timeout waiting for close\n"); |
1da177e4 LT |
1545 | break; |
1546 | } | |
1547 | } | |
1548 | ||
1549 | } | |
1550 | ||
1551 | if (--bp->count < 0) { | |
a72492bd AC |
1552 | printk(KERN_ERR |
1553 | "sx%d: sx_shutdown_port: bad board count: %d port: %d\n", | |
1554 | board_No(bp), bp->count, tty->index); | |
1da177e4 LT |
1555 | bp->count = 0; |
1556 | } | |
44b7d1b3 | 1557 | if (--port->port.count < 0) { |
a72492bd AC |
1558 | printk(KERN_ERR |
1559 | "sx%d: sx_close: bad port count for tty%d: %d\n", | |
1560 | board_No(bp), port_No(port), port->port.count); | |
44b7d1b3 | 1561 | port->port.count = 0; |
1da177e4 LT |
1562 | } |
1563 | ||
1564 | sx_shutdown_port(bp, port); | |
978e595f | 1565 | sx_flush_buffer(tty); |
1da177e4 LT |
1566 | tty_ldisc_flush(tty); |
1567 | spin_lock_irqsave(&port->lock, flags); | |
1568 | tty->closing = 0; | |
44b7d1b3 | 1569 | port->port.tty = NULL; |
1da177e4 | 1570 | spin_unlock_irqrestore(&port->lock, flags); |
44b7d1b3 | 1571 | if (port->port.blocked_open) { |
a72492bd AC |
1572 | if (port->port.close_delay) |
1573 | msleep_interruptible( | |
1574 | jiffies_to_msecs(port->port.close_delay)); | |
44b7d1b3 | 1575 | wake_up_interruptible(&port->port.open_wait); |
1da177e4 | 1576 | } |
44b7d1b3 AC |
1577 | port->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); |
1578 | wake_up_interruptible(&port->port.close_wait); | |
1da177e4 LT |
1579 | |
1580 | func_exit(); | |
1581 | } | |
1582 | ||
1583 | ||
a72492bd AC |
1584 | static int sx_write(struct tty_struct *tty, |
1585 | const unsigned char *buf, int count) | |
1da177e4 | 1586 | { |
c9f19e96 | 1587 | struct specialix_port *port = tty->driver_data; |
1da177e4 LT |
1588 | struct specialix_board *bp; |
1589 | int c, total = 0; | |
1590 | unsigned long flags; | |
1591 | ||
1592 | func_enter(); | |
1593 | if (sx_paranoia_check(port, tty->name, "sx_write")) { | |
1594 | func_exit(); | |
1595 | return 0; | |
1596 | } | |
d61780c0 | 1597 | |
1da177e4 LT |
1598 | bp = port_Board(port); |
1599 | ||
365e0223 | 1600 | if (!port->xmit_buf) { |
1da177e4 LT |
1601 | func_exit(); |
1602 | return 0; | |
1603 | } | |
1604 | ||
1605 | while (1) { | |
1606 | spin_lock_irqsave(&port->lock, flags); | |
1607 | c = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1, | |
1608 | SERIAL_XMIT_SIZE - port->xmit_head)); | |
1609 | if (c <= 0) { | |
1610 | spin_unlock_irqrestore(&port->lock, flags); | |
1611 | break; | |
1612 | } | |
1613 | memcpy(port->xmit_buf + port->xmit_head, buf, c); | |
1614 | port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1); | |
1615 | port->xmit_cnt += c; | |
1616 | spin_unlock_irqrestore(&port->lock, flags); | |
1617 | ||
1618 | buf += c; | |
1619 | count -= c; | |
1620 | total += c; | |
1621 | } | |
1622 | ||
1623 | spin_lock_irqsave(&bp->lock, flags); | |
1624 | if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped && | |
1625 | !(port->IER & IER_TXRDY)) { | |
1626 | port->IER |= IER_TXRDY; | |
1627 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1628 | sx_out(bp, CD186x_IER, port->IER); | |
1629 | } | |
1630 | spin_unlock_irqrestore(&bp->lock, flags); | |
1631 | func_exit(); | |
1632 | ||
1633 | return total; | |
1634 | } | |
1635 | ||
1636 | ||
a72492bd | 1637 | static int sx_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 | 1638 | { |
c9f19e96 | 1639 | struct specialix_port *port = tty->driver_data; |
1da177e4 | 1640 | unsigned long flags; |
a72492bd | 1641 | struct specialix_board *bp; |
1da177e4 LT |
1642 | |
1643 | func_enter(); | |
1644 | ||
1645 | if (sx_paranoia_check(port, tty->name, "sx_put_char")) { | |
1646 | func_exit(); | |
6ae04576 | 1647 | return 0; |
1da177e4 | 1648 | } |
a72492bd | 1649 | dprintk(SX_DEBUG_TX, "check tty: %p %p\n", tty, port->xmit_buf); |
326f28e9 | 1650 | if (!port->xmit_buf) { |
1da177e4 | 1651 | func_exit(); |
6ae04576 | 1652 | return 0; |
1da177e4 LT |
1653 | } |
1654 | bp = port_Board(port); | |
1655 | spin_lock_irqsave(&port->lock, flags); | |
1656 | ||
a72492bd AC |
1657 | dprintk(SX_DEBUG_TX, "xmit_cnt: %d xmit_buf: %p\n", |
1658 | port->xmit_cnt, port->xmit_buf); | |
1659 | if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1 || !port->xmit_buf) { | |
1da177e4 | 1660 | spin_unlock_irqrestore(&port->lock, flags); |
a72492bd | 1661 | dprintk(SX_DEBUG_TX, "Exit size\n"); |
1da177e4 | 1662 | func_exit(); |
6ae04576 | 1663 | return 0; |
1da177e4 | 1664 | } |
a72492bd | 1665 | dprintk(SX_DEBUG_TX, "Handle xmit: %p %p\n", port, port->xmit_buf); |
1da177e4 LT |
1666 | port->xmit_buf[port->xmit_head++] = ch; |
1667 | port->xmit_head &= SERIAL_XMIT_SIZE - 1; | |
1668 | port->xmit_cnt++; | |
1669 | spin_unlock_irqrestore(&port->lock, flags); | |
1670 | ||
1671 | func_exit(); | |
6ae04576 | 1672 | return 1; |
1da177e4 LT |
1673 | } |
1674 | ||
1675 | ||
a72492bd | 1676 | static void sx_flush_chars(struct tty_struct *tty) |
1da177e4 | 1677 | { |
c9f19e96 | 1678 | struct specialix_port *port = tty->driver_data; |
1da177e4 | 1679 | unsigned long flags; |
a72492bd | 1680 | struct specialix_board *bp = port_Board(port); |
1da177e4 LT |
1681 | |
1682 | func_enter(); | |
1683 | ||
1684 | if (sx_paranoia_check(port, tty->name, "sx_flush_chars")) { | |
1685 | func_exit(); | |
1686 | return; | |
1687 | } | |
1688 | if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || | |
1689 | !port->xmit_buf) { | |
1690 | func_exit(); | |
1691 | return; | |
1692 | } | |
1693 | spin_lock_irqsave(&bp->lock, flags); | |
1694 | port->IER |= IER_TXRDY; | |
1695 | sx_out(port_Board(port), CD186x_CAR, port_No(port)); | |
1696 | sx_out(port_Board(port), CD186x_IER, port->IER); | |
1697 | spin_unlock_irqrestore(&bp->lock, flags); | |
1698 | ||
1699 | func_exit(); | |
1700 | } | |
1701 | ||
1702 | ||
a72492bd | 1703 | static int sx_write_room(struct tty_struct *tty) |
1da177e4 | 1704 | { |
c9f19e96 | 1705 | struct specialix_port *port = tty->driver_data; |
1da177e4 LT |
1706 | int ret; |
1707 | ||
1708 | func_enter(); | |
1709 | ||
1710 | if (sx_paranoia_check(port, tty->name, "sx_write_room")) { | |
1711 | func_exit(); | |
1712 | return 0; | |
1713 | } | |
1714 | ||
1715 | ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; | |
1716 | if (ret < 0) | |
1717 | ret = 0; | |
1718 | ||
1719 | func_exit(); | |
1720 | return ret; | |
1721 | } | |
1722 | ||
1723 | ||
1724 | static int sx_chars_in_buffer(struct tty_struct *tty) | |
1725 | { | |
c9f19e96 | 1726 | struct specialix_port *port = tty->driver_data; |
1da177e4 LT |
1727 | |
1728 | func_enter(); | |
d61780c0 | 1729 | |
1da177e4 LT |
1730 | if (sx_paranoia_check(port, tty->name, "sx_chars_in_buffer")) { |
1731 | func_exit(); | |
1732 | return 0; | |
1733 | } | |
1734 | func_exit(); | |
1735 | return port->xmit_cnt; | |
1736 | } | |
1737 | ||
1da177e4 LT |
1738 | static int sx_tiocmget(struct tty_struct *tty, struct file *file) |
1739 | { | |
c9f19e96 | 1740 | struct specialix_port *port = tty->driver_data; |
a72492bd | 1741 | struct specialix_board *bp; |
1da177e4 LT |
1742 | unsigned char status; |
1743 | unsigned int result; | |
1744 | unsigned long flags; | |
1745 | ||
1746 | func_enter(); | |
1747 | ||
bf9d8929 | 1748 | if (sx_paranoia_check(port, tty->name, __func__)) { |
1da177e4 LT |
1749 | func_exit(); |
1750 | return -ENODEV; | |
1751 | } | |
1752 | ||
1753 | bp = port_Board(port); | |
a72492bd | 1754 | spin_lock_irqsave(&bp->lock, flags); |
1da177e4 LT |
1755 | sx_out(bp, CD186x_CAR, port_No(port)); |
1756 | status = sx_in(bp, CD186x_MSVR); | |
1757 | spin_unlock_irqrestore(&bp->lock, flags); | |
a72492bd AC |
1758 | dprintk(SX_DEBUG_INIT, "Got msvr[%d] = %02x, car = %d.\n", |
1759 | port_No(port), status, sx_in(bp, CD186x_CAR)); | |
1760 | dprintk(SX_DEBUG_INIT, "sx_port = %p, port = %p\n", sx_port, port); | |
d2fbd0f2 AC |
1761 | if (sx_crtscts(port->port.tty)) { |
1762 | result = TIOCM_DTR | TIOCM_DSR | |
a72492bd AC |
1763 | | ((status & MSVR_DTR) ? TIOCM_RTS : 0) |
1764 | | ((status & MSVR_CD) ? TIOCM_CAR : 0) | |
a72492bd | 1765 | | ((status & MSVR_CTS) ? TIOCM_CTS : 0); |
1da177e4 | 1766 | } else { |
d2fbd0f2 | 1767 | result = TIOCM_RTS | TIOCM_DSR |
a72492bd AC |
1768 | | ((status & MSVR_DTR) ? TIOCM_DTR : 0) |
1769 | | ((status & MSVR_CD) ? TIOCM_CAR : 0) | |
a72492bd | 1770 | | ((status & MSVR_CTS) ? TIOCM_CTS : 0); |
1da177e4 LT |
1771 | } |
1772 | ||
1773 | func_exit(); | |
1774 | ||
1775 | return result; | |
1776 | } | |
1777 | ||
1778 | ||
1779 | static int sx_tiocmset(struct tty_struct *tty, struct file *file, | |
1780 | unsigned int set, unsigned int clear) | |
1781 | { | |
c9f19e96 | 1782 | struct specialix_port *port = tty->driver_data; |
1da177e4 LT |
1783 | unsigned long flags; |
1784 | struct specialix_board *bp; | |
1785 | ||
1786 | func_enter(); | |
1787 | ||
bf9d8929 | 1788 | if (sx_paranoia_check(port, tty->name, __func__)) { |
1da177e4 LT |
1789 | func_exit(); |
1790 | return -ENODEV; | |
1791 | } | |
1792 | ||
1793 | bp = port_Board(port); | |
1794 | ||
1795 | spin_lock_irqsave(&port->lock, flags); | |
d2fbd0f2 | 1796 | if (sx_crtscts(port->port.tty)) { |
1da177e4 LT |
1797 | if (set & TIOCM_RTS) |
1798 | port->MSVR |= MSVR_DTR; | |
1799 | } else { | |
1800 | if (set & TIOCM_DTR) | |
1801 | port->MSVR |= MSVR_DTR; | |
1802 | } | |
d2fbd0f2 | 1803 | if (sx_crtscts(port->port.tty)) { |
1da177e4 LT |
1804 | if (clear & TIOCM_RTS) |
1805 | port->MSVR &= ~MSVR_DTR; | |
1806 | } else { | |
1807 | if (clear & TIOCM_DTR) | |
1808 | port->MSVR &= ~MSVR_DTR; | |
1809 | } | |
25470256 | 1810 | spin_lock(&bp->lock); |
1da177e4 LT |
1811 | sx_out(bp, CD186x_CAR, port_No(port)); |
1812 | sx_out(bp, CD186x_MSVR, port->MSVR); | |
25470256 | 1813 | spin_unlock(&bp->lock); |
1da177e4 LT |
1814 | spin_unlock_irqrestore(&port->lock, flags); |
1815 | func_exit(); | |
1816 | return 0; | |
1817 | } | |
1818 | ||
1819 | ||
faa7612c | 1820 | static int sx_send_break(struct tty_struct *tty, int length) |
1da177e4 | 1821 | { |
c9f19e96 | 1822 | struct specialix_port *port = tty->driver_data; |
1da177e4 LT |
1823 | struct specialix_board *bp = port_Board(port); |
1824 | unsigned long flags; | |
d61780c0 | 1825 | |
1da177e4 | 1826 | func_enter(); |
faa7612c AC |
1827 | if (length == 0 || length == -1) |
1828 | return -EOPNOTSUPP; | |
1da177e4 | 1829 | |
a72492bd | 1830 | spin_lock_irqsave(&port->lock, flags); |
1da177e4 LT |
1831 | port->break_length = SPECIALIX_TPS / HZ * length; |
1832 | port->COR2 |= COR2_ETC; | |
1833 | port->IER |= IER_TXRDY; | |
25470256 | 1834 | spin_lock(&bp->lock); |
1da177e4 LT |
1835 | sx_out(bp, CD186x_CAR, port_No(port)); |
1836 | sx_out(bp, CD186x_COR2, port->COR2); | |
1837 | sx_out(bp, CD186x_IER, port->IER); | |
25470256 | 1838 | spin_unlock(&bp->lock); |
a72492bd | 1839 | spin_unlock_irqrestore(&port->lock, flags); |
1da177e4 LT |
1840 | sx_wait_CCR(bp); |
1841 | spin_lock_irqsave(&bp->lock, flags); | |
1842 | sx_out(bp, CD186x_CCR, CCR_CORCHG2); | |
1843 | spin_unlock_irqrestore(&bp->lock, flags); | |
1844 | sx_wait_CCR(bp); | |
1845 | ||
1846 | func_exit(); | |
faa7612c | 1847 | return 0; |
1da177e4 LT |
1848 | } |
1849 | ||
1850 | ||
d2fbd0f2 | 1851 | static int sx_set_serial_info(struct specialix_port *port, |
a72492bd | 1852 | struct serial_struct __user *newinfo) |
1da177e4 LT |
1853 | { |
1854 | struct serial_struct tmp; | |
1855 | struct specialix_board *bp = port_Board(port); | |
1856 | int change_speed; | |
1857 | ||
1858 | func_enter(); | |
b190e178 | 1859 | |
1da177e4 LT |
1860 | if (copy_from_user(&tmp, newinfo, sizeof(tmp))) { |
1861 | func_enter(); | |
1862 | return -EFAULT; | |
1863 | } | |
d61780c0 | 1864 | |
b190e178 | 1865 | lock_kernel(); |
1da177e4 | 1866 | |
44b7d1b3 | 1867 | change_speed = ((port->port.flags & ASYNC_SPD_MASK) != |
1da177e4 LT |
1868 | (tmp.flags & ASYNC_SPD_MASK)); |
1869 | change_speed |= (tmp.custom_divisor != port->custom_divisor); | |
d61780c0 | 1870 | |
1da177e4 | 1871 | if (!capable(CAP_SYS_ADMIN)) { |
44b7d1b3 AC |
1872 | if ((tmp.close_delay != port->port.close_delay) || |
1873 | (tmp.closing_wait != port->port.closing_wait) || | |
1da177e4 | 1874 | ((tmp.flags & ~ASYNC_USR_MASK) != |
44b7d1b3 | 1875 | (port->port.flags & ~ASYNC_USR_MASK))) { |
1da177e4 | 1876 | func_exit(); |
b190e178 | 1877 | unlock_kernel(); |
1da177e4 LT |
1878 | return -EPERM; |
1879 | } | |
44b7d1b3 | 1880 | port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) | |
a72492bd | 1881 | (tmp.flags & ASYNC_USR_MASK)); |
1da177e4 LT |
1882 | port->custom_divisor = tmp.custom_divisor; |
1883 | } else { | |
44b7d1b3 | 1884 | port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) | |
a72492bd | 1885 | (tmp.flags & ASYNC_FLAGS)); |
44b7d1b3 AC |
1886 | port->port.close_delay = tmp.close_delay; |
1887 | port->port.closing_wait = tmp.closing_wait; | |
1da177e4 LT |
1888 | port->custom_divisor = tmp.custom_divisor; |
1889 | } | |
a72492bd | 1890 | if (change_speed) |
1da177e4 | 1891 | sx_change_speed(bp, port); |
a72492bd | 1892 | |
1da177e4 | 1893 | func_exit(); |
b190e178 | 1894 | unlock_kernel(); |
1da177e4 LT |
1895 | return 0; |
1896 | } | |
1897 | ||
1898 | ||
d2fbd0f2 | 1899 | static int sx_get_serial_info(struct specialix_port *port, |
1da177e4 LT |
1900 | struct serial_struct __user *retinfo) |
1901 | { | |
1902 | struct serial_struct tmp; | |
1903 | struct specialix_board *bp = port_Board(port); | |
d61780c0 | 1904 | |
1da177e4 LT |
1905 | func_enter(); |
1906 | ||
1da177e4 | 1907 | memset(&tmp, 0, sizeof(tmp)); |
b190e178 | 1908 | lock_kernel(); |
1da177e4 LT |
1909 | tmp.type = PORT_CIRRUS; |
1910 | tmp.line = port - sx_port; | |
1911 | tmp.port = bp->base; | |
1912 | tmp.irq = bp->irq; | |
44b7d1b3 | 1913 | tmp.flags = port->port.flags; |
1da177e4 | 1914 | tmp.baud_base = (SX_OSCFREQ + CD186x_TPC/2) / CD186x_TPC; |
44b7d1b3 AC |
1915 | tmp.close_delay = port->port.close_delay * HZ/100; |
1916 | tmp.closing_wait = port->port.closing_wait * HZ/100; | |
1da177e4 LT |
1917 | tmp.custom_divisor = port->custom_divisor; |
1918 | tmp.xmit_fifo_size = CD186x_NFIFO; | |
b190e178 | 1919 | unlock_kernel(); |
1da177e4 LT |
1920 | if (copy_to_user(retinfo, &tmp, sizeof(tmp))) { |
1921 | func_exit(); | |
1922 | return -EFAULT; | |
1923 | } | |
1924 | ||
1925 | func_exit(); | |
1926 | return 0; | |
1927 | } | |
1928 | ||
1929 | ||
a72492bd AC |
1930 | static int sx_ioctl(struct tty_struct *tty, struct file *filp, |
1931 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1932 | { |
c9f19e96 | 1933 | struct specialix_port *port = tty->driver_data; |
1da177e4 LT |
1934 | void __user *argp = (void __user *)arg; |
1935 | ||
1936 | func_enter(); | |
1937 | ||
1938 | if (sx_paranoia_check(port, tty->name, "sx_ioctl")) { | |
1939 | func_exit(); | |
1940 | return -ENODEV; | |
1941 | } | |
d61780c0 | 1942 | |
1da177e4 | 1943 | switch (cmd) { |
a72492bd | 1944 | case TIOCGSERIAL: |
faa7612c | 1945 | func_exit(); |
1da177e4 | 1946 | return sx_get_serial_info(port, argp); |
a72492bd | 1947 | case TIOCSSERIAL: |
faa7612c | 1948 | func_exit(); |
1da177e4 | 1949 | return sx_set_serial_info(port, argp); |
a72492bd | 1950 | default: |
faa7612c | 1951 | func_exit(); |
1da177e4 LT |
1952 | return -ENOIOCTLCMD; |
1953 | } | |
1954 | func_exit(); | |
1955 | return 0; | |
1956 | } | |
1957 | ||
1958 | ||
a72492bd | 1959 | static void sx_throttle(struct tty_struct *tty) |
1da177e4 | 1960 | { |
c9f19e96 | 1961 | struct specialix_port *port = tty->driver_data; |
1da177e4 LT |
1962 | struct specialix_board *bp; |
1963 | unsigned long flags; | |
1964 | ||
1965 | func_enter(); | |
1966 | ||
1967 | if (sx_paranoia_check(port, tty->name, "sx_throttle")) { | |
1968 | func_exit(); | |
1969 | return; | |
1970 | } | |
d61780c0 | 1971 | |
1da177e4 | 1972 | bp = port_Board(port); |
d61780c0 | 1973 | |
1da177e4 | 1974 | /* Use DTR instead of RTS ! */ |
d2fbd0f2 | 1975 | if (sx_crtscts(tty)) |
1da177e4 LT |
1976 | port->MSVR &= ~MSVR_DTR; |
1977 | else { | |
1978 | /* Auch!!! I think the system shouldn't call this then. */ | |
1979 | /* Or maybe we're supposed (allowed?) to do our side of hw | |
d61780c0 | 1980 | handshake anyway, even when hardware handshake is off. |
1da177e4 | 1981 | When you see this in your logs, please report.... */ |
a72492bd AC |
1982 | printk(KERN_ERR |
1983 | "sx%d: Need to throttle, but can't (hardware hs is off)\n", | |
1984 | port_No(port)); | |
1da177e4 LT |
1985 | } |
1986 | spin_lock_irqsave(&bp->lock, flags); | |
1987 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1988 | spin_unlock_irqrestore(&bp->lock, flags); | |
1989 | if (I_IXOFF(tty)) { | |
1da177e4 LT |
1990 | sx_wait_CCR(bp); |
1991 | spin_lock_irqsave(&bp->lock, flags); | |
1992 | sx_out(bp, CD186x_CCR, CCR_SSCH2); | |
1993 | spin_unlock_irqrestore(&bp->lock, flags); | |
1994 | sx_wait_CCR(bp); | |
1995 | } | |
1996 | spin_lock_irqsave(&bp->lock, flags); | |
1997 | sx_out(bp, CD186x_MSVR, port->MSVR); | |
1998 | spin_unlock_irqrestore(&bp->lock, flags); | |
1999 | ||
2000 | func_exit(); | |
2001 | } | |
2002 | ||
2003 | ||
a72492bd | 2004 | static void sx_unthrottle(struct tty_struct *tty) |
1da177e4 | 2005 | { |
c9f19e96 | 2006 | struct specialix_port *port = tty->driver_data; |
1da177e4 LT |
2007 | struct specialix_board *bp; |
2008 | unsigned long flags; | |
2009 | ||
2010 | func_enter(); | |
d61780c0 | 2011 | |
1da177e4 LT |
2012 | if (sx_paranoia_check(port, tty->name, "sx_unthrottle")) { |
2013 | func_exit(); | |
2014 | return; | |
2015 | } | |
d61780c0 | 2016 | |
1da177e4 | 2017 | bp = port_Board(port); |
d61780c0 | 2018 | |
1da177e4 LT |
2019 | spin_lock_irqsave(&port->lock, flags); |
2020 | /* XXXX Use DTR INSTEAD???? */ | |
d2fbd0f2 | 2021 | if (sx_crtscts(tty)) |
1da177e4 | 2022 | port->MSVR |= MSVR_DTR; |
a72492bd | 2023 | /* Else clause: see remark in "sx_throttle"... */ |
25470256 | 2024 | spin_lock(&bp->lock); |
1da177e4 | 2025 | sx_out(bp, CD186x_CAR, port_No(port)); |
25470256 | 2026 | spin_unlock(&bp->lock); |
1da177e4 LT |
2027 | if (I_IXOFF(tty)) { |
2028 | spin_unlock_irqrestore(&port->lock, flags); | |
2029 | sx_wait_CCR(bp); | |
2030 | spin_lock_irqsave(&bp->lock, flags); | |
2031 | sx_out(bp, CD186x_CCR, CCR_SSCH1); | |
2032 | spin_unlock_irqrestore(&bp->lock, flags); | |
2033 | sx_wait_CCR(bp); | |
2034 | spin_lock_irqsave(&port->lock, flags); | |
2035 | } | |
25470256 | 2036 | spin_lock(&bp->lock); |
1da177e4 | 2037 | sx_out(bp, CD186x_MSVR, port->MSVR); |
25470256 | 2038 | spin_unlock(&bp->lock); |
1da177e4 LT |
2039 | spin_unlock_irqrestore(&port->lock, flags); |
2040 | ||
2041 | func_exit(); | |
2042 | } | |
2043 | ||
2044 | ||
a72492bd | 2045 | static void sx_stop(struct tty_struct *tty) |
1da177e4 | 2046 | { |
c9f19e96 | 2047 | struct specialix_port *port = tty->driver_data; |
1da177e4 LT |
2048 | struct specialix_board *bp; |
2049 | unsigned long flags; | |
2050 | ||
2051 | func_enter(); | |
d61780c0 | 2052 | |
1da177e4 LT |
2053 | if (sx_paranoia_check(port, tty->name, "sx_stop")) { |
2054 | func_exit(); | |
2055 | return; | |
2056 | } | |
2057 | ||
2058 | bp = port_Board(port); | |
d61780c0 | 2059 | |
1da177e4 LT |
2060 | spin_lock_irqsave(&port->lock, flags); |
2061 | port->IER &= ~IER_TXRDY; | |
25470256 | 2062 | spin_lock(&bp->lock); |
1da177e4 LT |
2063 | sx_out(bp, CD186x_CAR, port_No(port)); |
2064 | sx_out(bp, CD186x_IER, port->IER); | |
25470256 | 2065 | spin_unlock(&bp->lock); |
1da177e4 LT |
2066 | spin_unlock_irqrestore(&port->lock, flags); |
2067 | ||
2068 | func_exit(); | |
2069 | } | |
2070 | ||
2071 | ||
a72492bd | 2072 | static void sx_start(struct tty_struct *tty) |
1da177e4 | 2073 | { |
c9f19e96 | 2074 | struct specialix_port *port = tty->driver_data; |
1da177e4 LT |
2075 | struct specialix_board *bp; |
2076 | unsigned long flags; | |
2077 | ||
2078 | func_enter(); | |
d61780c0 | 2079 | |
1da177e4 LT |
2080 | if (sx_paranoia_check(port, tty->name, "sx_start")) { |
2081 | func_exit(); | |
2082 | return; | |
2083 | } | |
d61780c0 | 2084 | |
1da177e4 | 2085 | bp = port_Board(port); |
d61780c0 | 2086 | |
1da177e4 LT |
2087 | spin_lock_irqsave(&port->lock, flags); |
2088 | if (port->xmit_cnt && port->xmit_buf && !(port->IER & IER_TXRDY)) { | |
2089 | port->IER |= IER_TXRDY; | |
25470256 | 2090 | spin_lock(&bp->lock); |
1da177e4 LT |
2091 | sx_out(bp, CD186x_CAR, port_No(port)); |
2092 | sx_out(bp, CD186x_IER, port->IER); | |
25470256 | 2093 | spin_unlock(&bp->lock); |
1da177e4 LT |
2094 | } |
2095 | spin_unlock_irqrestore(&port->lock, flags); | |
2096 | ||
2097 | func_exit(); | |
2098 | } | |
2099 | ||
a72492bd | 2100 | static void sx_hangup(struct tty_struct *tty) |
1da177e4 | 2101 | { |
c9f19e96 | 2102 | struct specialix_port *port = tty->driver_data; |
1da177e4 LT |
2103 | struct specialix_board *bp; |
2104 | unsigned long flags; | |
2105 | ||
2106 | func_enter(); | |
2107 | ||
2108 | if (sx_paranoia_check(port, tty->name, "sx_hangup")) { | |
2109 | func_exit(); | |
2110 | return; | |
2111 | } | |
d61780c0 | 2112 | |
1da177e4 | 2113 | bp = port_Board(port); |
d61780c0 | 2114 | |
1da177e4 LT |
2115 | sx_shutdown_port(bp, port); |
2116 | spin_lock_irqsave(&port->lock, flags); | |
44b7d1b3 | 2117 | bp->count -= port->port.count; |
1da177e4 | 2118 | if (bp->count < 0) { |
a72492bd AC |
2119 | printk(KERN_ERR |
2120 | "sx%d: sx_hangup: bad board count: %d port: %d\n", | |
2121 | board_No(bp), bp->count, tty->index); | |
1da177e4 LT |
2122 | bp->count = 0; |
2123 | } | |
44b7d1b3 AC |
2124 | port->port.count = 0; |
2125 | port->port.flags &= ~ASYNC_NORMAL_ACTIVE; | |
2126 | port->port.tty = NULL; | |
1da177e4 | 2127 | spin_unlock_irqrestore(&port->lock, flags); |
44b7d1b3 | 2128 | wake_up_interruptible(&port->port.open_wait); |
1da177e4 LT |
2129 | |
2130 | func_exit(); | |
2131 | } | |
2132 | ||
2133 | ||
a72492bd AC |
2134 | static void sx_set_termios(struct tty_struct *tty, |
2135 | struct ktermios *old_termios) | |
1da177e4 | 2136 | { |
c9f19e96 | 2137 | struct specialix_port *port = tty->driver_data; |
1da177e4 | 2138 | unsigned long flags; |
a72492bd | 2139 | struct specialix_board *bp; |
d61780c0 | 2140 | |
1da177e4 LT |
2141 | if (sx_paranoia_check(port, tty->name, "sx_set_termios")) |
2142 | return; | |
d61780c0 | 2143 | |
1da177e4 LT |
2144 | bp = port_Board(port); |
2145 | spin_lock_irqsave(&port->lock, flags); | |
2146 | sx_change_speed(port_Board(port), port); | |
2147 | spin_unlock_irqrestore(&port->lock, flags); | |
2148 | ||
2149 | if ((old_termios->c_cflag & CRTSCTS) && | |
2150 | !(tty->termios->c_cflag & CRTSCTS)) { | |
2151 | tty->hw_stopped = 0; | |
2152 | sx_start(tty); | |
2153 | } | |
2154 | } | |
2155 | ||
b68e31d0 | 2156 | static const struct tty_operations sx_ops = { |
1da177e4 LT |
2157 | .open = sx_open, |
2158 | .close = sx_close, | |
2159 | .write = sx_write, | |
2160 | .put_char = sx_put_char, | |
2161 | .flush_chars = sx_flush_chars, | |
2162 | .write_room = sx_write_room, | |
2163 | .chars_in_buffer = sx_chars_in_buffer, | |
2164 | .flush_buffer = sx_flush_buffer, | |
2165 | .ioctl = sx_ioctl, | |
2166 | .throttle = sx_throttle, | |
2167 | .unthrottle = sx_unthrottle, | |
2168 | .set_termios = sx_set_termios, | |
2169 | .stop = sx_stop, | |
2170 | .start = sx_start, | |
2171 | .hangup = sx_hangup, | |
2172 | .tiocmget = sx_tiocmget, | |
2173 | .tiocmset = sx_tiocmset, | |
faa7612c | 2174 | .break_ctl = sx_send_break, |
1da177e4 LT |
2175 | }; |
2176 | ||
2177 | static int sx_init_drivers(void) | |
2178 | { | |
2179 | int error; | |
2180 | int i; | |
2181 | ||
2182 | func_enter(); | |
2183 | ||
2184 | specialix_driver = alloc_tty_driver(SX_NBOARD * SX_NPORT); | |
2185 | if (!specialix_driver) { | |
2186 | printk(KERN_ERR "sx: Couldn't allocate tty_driver.\n"); | |
2187 | func_exit(); | |
2188 | return 1; | |
2189 | } | |
d61780c0 | 2190 | |
1da177e4 LT |
2191 | specialix_driver->owner = THIS_MODULE; |
2192 | specialix_driver->name = "ttyW"; | |
2193 | specialix_driver->major = SPECIALIX_NORMAL_MAJOR; | |
2194 | specialix_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
2195 | specialix_driver->subtype = SERIAL_TYPE_NORMAL; | |
2196 | specialix_driver->init_termios = tty_std_termios; | |
2197 | specialix_driver->init_termios.c_cflag = | |
2198 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
606d099c AC |
2199 | specialix_driver->init_termios.c_ispeed = 9600; |
2200 | specialix_driver->init_termios.c_ospeed = 9600; | |
faa7612c AC |
2201 | specialix_driver->flags = TTY_DRIVER_REAL_RAW | |
2202 | TTY_DRIVER_HARDWARE_BREAK; | |
1da177e4 LT |
2203 | tty_set_operations(specialix_driver, &sx_ops); |
2204 | ||
a72492bd AC |
2205 | error = tty_register_driver(specialix_driver); |
2206 | if (error) { | |
1da177e4 | 2207 | put_tty_driver(specialix_driver); |
a72492bd AC |
2208 | printk(KERN_ERR |
2209 | "sx: Couldn't register specialix IO8+ driver, error = %d\n", | |
2210 | error); | |
1da177e4 LT |
2211 | func_exit(); |
2212 | return 1; | |
2213 | } | |
2214 | memset(sx_port, 0, sizeof(sx_port)); | |
2215 | for (i = 0; i < SX_NPORT * SX_NBOARD; i++) { | |
2216 | sx_port[i].magic = SPECIALIX_MAGIC; | |
44b7d1b3 | 2217 | tty_port_init(&sx_port[i].port); |
1da177e4 LT |
2218 | spin_lock_init(&sx_port[i].lock); |
2219 | } | |
d61780c0 | 2220 | |
1da177e4 LT |
2221 | func_exit(); |
2222 | return 0; | |
2223 | } | |
2224 | ||
2225 | static void sx_release_drivers(void) | |
2226 | { | |
2227 | func_enter(); | |
2228 | ||
1da177e4 LT |
2229 | tty_unregister_driver(specialix_driver); |
2230 | put_tty_driver(specialix_driver); | |
2231 | func_exit(); | |
2232 | } | |
2233 | ||
d61780c0 JG |
2234 | /* |
2235 | * This routine must be called by kernel at boot time | |
1da177e4 LT |
2236 | */ |
2237 | static int __init specialix_init(void) | |
2238 | { | |
2239 | int i; | |
2240 | int found = 0; | |
2241 | ||
2242 | func_enter(); | |
2243 | ||
2244 | printk(KERN_INFO "sx: Specialix IO8+ driver v" VERSION ", (c) R.E.Wolff 1997/1998.\n"); | |
2245 | printk(KERN_INFO "sx: derived from work (c) D.Gorodchanin 1994-1996.\n"); | |
d2fbd0f2 AC |
2246 | if (sx_rtscts) |
2247 | printk(KERN_INFO | |
2248 | "sx: DTR/RTS pin is RTS when CRTSCTS is on.\n"); | |
2249 | else | |
2250 | printk(KERN_INFO "sx: DTR/RTS pin is always RTS.\n"); | |
d61780c0 | 2251 | |
1da177e4 | 2252 | for (i = 0; i < SX_NBOARD; i++) |
34af946a | 2253 | spin_lock_init(&sx_board[i].lock); |
1da177e4 LT |
2254 | |
2255 | if (sx_init_drivers()) { | |
2256 | func_exit(); | |
2257 | return -EIO; | |
2258 | } | |
2259 | ||
d61780c0 | 2260 | for (i = 0; i < SX_NBOARD; i++) |
1da177e4 LT |
2261 | if (sx_board[i].base && !sx_probe(&sx_board[i])) |
2262 | found++; | |
2263 | ||
2264 | #ifdef CONFIG_PCI | |
2265 | { | |
2266 | struct pci_dev *pdev = NULL; | |
2267 | ||
a72492bd | 2268 | i = 0; |
1da177e4 LT |
2269 | while (i < SX_NBOARD) { |
2270 | if (sx_board[i].flags & SX_BOARD_PRESENT) { | |
2271 | i++; | |
2272 | continue; | |
2273 | } | |
a72492bd AC |
2274 | pdev = pci_get_device(PCI_VENDOR_ID_SPECIALIX, |
2275 | PCI_DEVICE_ID_SPECIALIX_IO8, pdev); | |
2276 | if (!pdev) | |
2277 | break; | |
1da177e4 LT |
2278 | |
2279 | if (pci_enable_device(pdev)) | |
2280 | continue; | |
2281 | ||
2282 | sx_board[i].irq = pdev->irq; | |
2283 | ||
a72492bd | 2284 | sx_board[i].base = pci_resource_start(pdev, 2); |
1da177e4 LT |
2285 | |
2286 | sx_board[i].flags |= SX_BOARD_IS_PCI; | |
2287 | if (!sx_probe(&sx_board[i])) | |
a72492bd | 2288 | found++; |
1da177e4 | 2289 | } |
606d099c AC |
2290 | /* May exit pci_get sequence early with lots of boards */ |
2291 | if (pdev != NULL) | |
2292 | pci_dev_put(pdev); | |
1da177e4 LT |
2293 | } |
2294 | #endif | |
2295 | ||
2296 | if (!found) { | |
2297 | sx_release_drivers(); | |
2298 | printk(KERN_INFO "sx: No specialix IO8+ boards detected.\n"); | |
2299 | func_exit(); | |
2300 | return -EIO; | |
2301 | } | |
2302 | ||
2303 | func_exit(); | |
2304 | return 0; | |
2305 | } | |
2306 | ||
2307 | static int iobase[SX_NBOARD] = {0,}; | |
d2fbd0f2 | 2308 | static int irq[SX_NBOARD] = {0,}; |
1da177e4 LT |
2309 | |
2310 | module_param_array(iobase, int, NULL, 0); | |
2311 | module_param_array(irq, int, NULL, 0); | |
2312 | module_param(sx_debug, int, 0); | |
d2fbd0f2 | 2313 | module_param(sx_rtscts, int, 0); |
1da177e4 | 2314 | module_param(sx_rxfifo, int, 0); |
1da177e4 LT |
2315 | |
2316 | /* | |
2317 | * You can setup up to 4 boards. | |
2318 | * by specifying "iobase=0xXXX,0xXXX ..." as insmod parameter. | |
d61780c0 JG |
2319 | * You should specify the IRQs too in that case "irq=....,...". |
2320 | * | |
1da177e4 | 2321 | * More than 4 boards in one computer is not possible, as the card can |
d61780c0 | 2322 | * only use 4 different interrupts. |
1da177e4 LT |
2323 | * |
2324 | */ | |
2325 | static int __init specialix_init_module(void) | |
2326 | { | |
2327 | int i; | |
2328 | ||
2329 | func_enter(); | |
2330 | ||
1da177e4 | 2331 | if (iobase[0] || iobase[1] || iobase[2] || iobase[3]) { |
a72492bd | 2332 | for (i = 0; i < SX_NBOARD; i++) { |
1da177e4 LT |
2333 | sx_board[i].base = iobase[i]; |
2334 | sx_board[i].irq = irq[i]; | |
a72492bd | 2335 | sx_board[i].count = 0; |
1da177e4 LT |
2336 | } |
2337 | } | |
2338 | ||
2339 | func_exit(); | |
2340 | ||
2341 | return specialix_init(); | |
2342 | } | |
d61780c0 | 2343 | |
1da177e4 LT |
2344 | static void __exit specialix_exit_module(void) |
2345 | { | |
2346 | int i; | |
d61780c0 | 2347 | |
1da177e4 LT |
2348 | func_enter(); |
2349 | ||
2350 | sx_release_drivers(); | |
2351 | for (i = 0; i < SX_NBOARD; i++) | |
d61780c0 | 2352 | if (sx_board[i].flags & SX_BOARD_PRESENT) |
1da177e4 | 2353 | sx_release_io_range(&sx_board[i]); |
1da177e4 LT |
2354 | func_exit(); |
2355 | } | |
2356 | ||
7691030b CS |
2357 | static struct pci_device_id specialx_pci_tbl[] __devinitdata = { |
2358 | { PCI_DEVICE(PCI_VENDOR_ID_SPECIALIX, PCI_DEVICE_ID_SPECIALIX_IO8) }, | |
2359 | { } | |
2360 | }; | |
2361 | MODULE_DEVICE_TABLE(pci, specialx_pci_tbl); | |
2362 | ||
1da177e4 LT |
2363 | module_init(specialix_init_module); |
2364 | module_exit(specialix_exit_module); | |
2365 | ||
2366 | MODULE_LICENSE("GPL"); | |
5350d3ba | 2367 | MODULE_ALIAS_CHARDEV_MAJOR(SPECIALIX_NORMAL_MAJOR); |