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Commit | Line | Data |
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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 | 649 | tty_buffer_request_room(tty, count); |
1da177e4 | 650 | |
33f0f88f AC |
651 | while (count--) |
652 | tty_insert_flip_char(tty, sx_in(bp, CD186x_RDR), TTY_NORMAL); | |
653 | tty_flip_buffer_push(tty); | |
1da177e4 LT |
654 | func_exit(); |
655 | } | |
656 | ||
657 | ||
d2fbd0f2 | 658 | static void sx_transmit(struct specialix_board *bp) |
1da177e4 LT |
659 | { |
660 | struct specialix_port *port; | |
661 | struct tty_struct *tty; | |
662 | unsigned char count; | |
663 | ||
664 | func_enter(); | |
a72492bd AC |
665 | port = sx_get_port(bp, "Transmit"); |
666 | if (port == NULL) { | |
1da177e4 LT |
667 | func_exit(); |
668 | return; | |
669 | } | |
a72492bd | 670 | dprintk(SX_DEBUG_TX, "port: %p\n", port); |
44b7d1b3 | 671 | tty = port->port.tty; |
d61780c0 | 672 | |
1da177e4 LT |
673 | if (port->IER & IER_TXEMPTY) { |
674 | /* FIFO drained */ | |
675 | sx_out(bp, CD186x_CAR, port_No(port)); | |
676 | port->IER &= ~IER_TXEMPTY; | |
677 | sx_out(bp, CD186x_IER, port->IER); | |
678 | func_exit(); | |
679 | return; | |
680 | } | |
d61780c0 | 681 | |
1da177e4 LT |
682 | if ((port->xmit_cnt <= 0 && !port->break_length) |
683 | || tty->stopped || tty->hw_stopped) { | |
684 | sx_out(bp, CD186x_CAR, port_No(port)); | |
685 | port->IER &= ~IER_TXRDY; | |
686 | sx_out(bp, CD186x_IER, port->IER); | |
687 | func_exit(); | |
688 | return; | |
689 | } | |
d61780c0 | 690 | |
1da177e4 LT |
691 | if (port->break_length) { |
692 | if (port->break_length > 0) { | |
693 | if (port->COR2 & COR2_ETC) { | |
694 | sx_out(bp, CD186x_TDR, CD186x_C_ESC); | |
695 | sx_out(bp, CD186x_TDR, CD186x_C_SBRK); | |
696 | port->COR2 &= ~COR2_ETC; | |
697 | } | |
698 | count = min_t(int, port->break_length, 0xff); | |
699 | sx_out(bp, CD186x_TDR, CD186x_C_ESC); | |
700 | sx_out(bp, CD186x_TDR, CD186x_C_DELAY); | |
701 | sx_out(bp, CD186x_TDR, count); | |
a72492bd AC |
702 | port->break_length -= count; |
703 | if (port->break_length == 0) | |
1da177e4 LT |
704 | port->break_length--; |
705 | } else { | |
706 | sx_out(bp, CD186x_TDR, CD186x_C_ESC); | |
707 | sx_out(bp, CD186x_TDR, CD186x_C_EBRK); | |
708 | sx_out(bp, CD186x_COR2, port->COR2); | |
709 | sx_wait_CCR(bp); | |
710 | sx_out(bp, CD186x_CCR, CCR_CORCHG2); | |
711 | port->break_length = 0; | |
712 | } | |
713 | ||
714 | func_exit(); | |
715 | return; | |
716 | } | |
d61780c0 | 717 | |
1da177e4 LT |
718 | count = CD186x_NFIFO; |
719 | do { | |
720 | sx_out(bp, CD186x_TDR, port->xmit_buf[port->xmit_tail++]); | |
721 | port->xmit_tail = port->xmit_tail & (SERIAL_XMIT_SIZE-1); | |
722 | if (--port->xmit_cnt <= 0) | |
723 | break; | |
724 | } while (--count > 0); | |
d61780c0 | 725 | |
1da177e4 LT |
726 | if (port->xmit_cnt <= 0) { |
727 | sx_out(bp, CD186x_CAR, port_No(port)); | |
728 | port->IER &= ~IER_TXRDY; | |
729 | sx_out(bp, CD186x_IER, port->IER); | |
730 | } | |
731 | if (port->xmit_cnt <= port->wakeup_chars) | |
a72492bd | 732 | tty_wakeup(tty); |
1da177e4 LT |
733 | |
734 | func_exit(); | |
735 | } | |
736 | ||
737 | ||
d2fbd0f2 | 738 | static void sx_check_modem(struct specialix_board *bp) |
1da177e4 LT |
739 | { |
740 | struct specialix_port *port; | |
741 | struct tty_struct *tty; | |
742 | unsigned char mcr; | |
743 | int msvr_cd; | |
744 | ||
a72492bd AC |
745 | dprintk(SX_DEBUG_SIGNALS, "Modem intr. "); |
746 | port = sx_get_port(bp, "Modem"); | |
747 | if (port == NULL) | |
1da177e4 | 748 | return; |
d61780c0 | 749 | |
44b7d1b3 | 750 | tty = port->port.tty; |
d61780c0 | 751 | |
1da177e4 | 752 | mcr = sx_in(bp, CD186x_MCR); |
1da177e4 LT |
753 | |
754 | if ((mcr & MCR_CDCHG)) { | |
a72492bd | 755 | dprintk(SX_DEBUG_SIGNALS, "CD just changed... "); |
1da177e4 LT |
756 | msvr_cd = sx_in(bp, CD186x_MSVR) & MSVR_CD; |
757 | if (msvr_cd) { | |
a72492bd | 758 | dprintk(SX_DEBUG_SIGNALS, "Waking up guys in open.\n"); |
44b7d1b3 | 759 | wake_up_interruptible(&port->port.open_wait); |
1da177e4 | 760 | } else { |
a72492bd | 761 | dprintk(SX_DEBUG_SIGNALS, "Sending HUP.\n"); |
d0d4e1c0 | 762 | tty_hangup(tty); |
1da177e4 LT |
763 | } |
764 | } | |
d61780c0 | 765 | |
1da177e4 LT |
766 | #ifdef SPECIALIX_BRAIN_DAMAGED_CTS |
767 | if (mcr & MCR_CTSCHG) { | |
768 | if (sx_in(bp, CD186x_MSVR) & MSVR_CTS) { | |
769 | tty->hw_stopped = 0; | |
770 | port->IER |= IER_TXRDY; | |
771 | if (port->xmit_cnt <= port->wakeup_chars) | |
d0d4e1c0 | 772 | tty_wakeup(tty); |
1da177e4 LT |
773 | } else { |
774 | tty->hw_stopped = 1; | |
775 | port->IER &= ~IER_TXRDY; | |
776 | } | |
777 | sx_out(bp, CD186x_IER, port->IER); | |
778 | } | |
779 | if (mcr & MCR_DSSXHG) { | |
780 | if (sx_in(bp, CD186x_MSVR) & MSVR_DSR) { | |
781 | tty->hw_stopped = 0; | |
782 | port->IER |= IER_TXRDY; | |
783 | if (port->xmit_cnt <= port->wakeup_chars) | |
d0d4e1c0 | 784 | tty_wakeup(tty); |
1da177e4 LT |
785 | } else { |
786 | tty->hw_stopped = 1; | |
787 | port->IER &= ~IER_TXRDY; | |
788 | } | |
789 | sx_out(bp, CD186x_IER, port->IER); | |
790 | } | |
791 | #endif /* SPECIALIX_BRAIN_DAMAGED_CTS */ | |
d61780c0 | 792 | |
1da177e4 LT |
793 | /* Clear change bits */ |
794 | sx_out(bp, CD186x_MCR, 0); | |
795 | } | |
796 | ||
797 | ||
798 | /* The main interrupt processing routine */ | |
a6f97b29 | 799 | static irqreturn_t sx_interrupt(int dummy, void *dev_id) |
1da177e4 LT |
800 | { |
801 | unsigned char status; | |
802 | unsigned char ack; | |
a6f97b29 | 803 | struct specialix_board *bp = dev_id; |
1da177e4 LT |
804 | unsigned long loop = 0; |
805 | int saved_reg; | |
806 | unsigned long flags; | |
807 | ||
808 | func_enter(); | |
809 | ||
1da177e4 LT |
810 | spin_lock_irqsave(&bp->lock, flags); |
811 | ||
a72492bd AC |
812 | dprintk(SX_DEBUG_FLOW, "enter %s port %d room: %ld\n", __func__, |
813 | port_No(sx_get_port(bp, "INT")), | |
814 | SERIAL_XMIT_SIZE - sx_get_port(bp, "ITN")->xmit_cnt - 1); | |
c7bec5ab | 815 | if (!(bp->flags & SX_BOARD_ACTIVE)) { |
a72492bd AC |
816 | dprintk(SX_DEBUG_IRQ, "sx: False interrupt. irq %d.\n", |
817 | bp->irq); | |
1da177e4 LT |
818 | spin_unlock_irqrestore(&bp->lock, flags); |
819 | func_exit(); | |
820 | return IRQ_NONE; | |
821 | } | |
822 | ||
823 | saved_reg = bp->reg; | |
824 | ||
a72492bd AC |
825 | while (++loop < 16) { |
826 | status = sx_in(bp, CD186x_SRSR) & | |
827 | (SRSR_RREQint | SRSR_TREQint | SRSR_MREQint); | |
828 | if (status == 0) | |
829 | break; | |
1da177e4 LT |
830 | if (status & SRSR_RREQint) { |
831 | ack = sx_in(bp, CD186x_RRAR); | |
832 | ||
833 | if (ack == (SX_ID | GIVR_IT_RCV)) | |
834 | sx_receive(bp); | |
835 | else if (ack == (SX_ID | GIVR_IT_REXC)) | |
836 | sx_receive_exc(bp); | |
837 | else | |
a72492bd AC |
838 | printk(KERN_ERR |
839 | "sx%d: status: 0x%x Bad receive ack 0x%02x.\n", | |
840 | board_No(bp), status, ack); | |
d61780c0 | 841 | |
1da177e4 LT |
842 | } else if (status & SRSR_TREQint) { |
843 | ack = sx_in(bp, CD186x_TRAR); | |
844 | ||
845 | if (ack == (SX_ID | GIVR_IT_TX)) | |
846 | sx_transmit(bp); | |
847 | else | |
848 | printk(KERN_ERR "sx%d: status: 0x%x Bad transmit ack 0x%02x. port: %d\n", | |
a72492bd AC |
849 | board_No(bp), status, ack, |
850 | port_No(sx_get_port(bp, "Int"))); | |
1da177e4 LT |
851 | } else if (status & SRSR_MREQint) { |
852 | ack = sx_in(bp, CD186x_MRAR); | |
853 | ||
d61780c0 | 854 | if (ack == (SX_ID | GIVR_IT_MODEM)) |
1da177e4 LT |
855 | sx_check_modem(bp); |
856 | else | |
a72492bd AC |
857 | printk(KERN_ERR |
858 | "sx%d: status: 0x%x Bad modem ack 0x%02x.\n", | |
1da177e4 | 859 | board_No(bp), status, ack); |
d61780c0 JG |
860 | |
861 | } | |
1da177e4 LT |
862 | |
863 | sx_out(bp, CD186x_EOIR, 0); /* Mark end of interrupt */ | |
864 | } | |
865 | bp->reg = saved_reg; | |
a72492bd | 866 | outb(bp->reg, bp->base + SX_ADDR_REG); |
1da177e4 LT |
867 | spin_unlock_irqrestore(&bp->lock, flags); |
868 | func_exit(); | |
869 | return IRQ_HANDLED; | |
870 | } | |
871 | ||
872 | ||
873 | /* | |
874 | * Routines for open & close processing. | |
875 | */ | |
876 | ||
a72492bd | 877 | static void turn_ints_off(struct specialix_board *bp) |
1da177e4 LT |
878 | { |
879 | unsigned long flags; | |
880 | ||
881 | func_enter(); | |
1da177e4 | 882 | spin_lock_irqsave(&bp->lock, flags); |
a72492bd | 883 | (void) sx_in_off(bp, 0); /* Turn off interrupts. */ |
1da177e4 LT |
884 | spin_unlock_irqrestore(&bp->lock, flags); |
885 | ||
886 | func_exit(); | |
887 | } | |
888 | ||
a72492bd | 889 | static void turn_ints_on(struct specialix_board *bp) |
1da177e4 LT |
890 | { |
891 | unsigned long flags; | |
892 | ||
893 | func_enter(); | |
894 | ||
1da177e4 | 895 | spin_lock_irqsave(&bp->lock, flags); |
a72492bd | 896 | (void) sx_in(bp, 0); /* Turn ON interrupts. */ |
1da177e4 LT |
897 | spin_unlock_irqrestore(&bp->lock, flags); |
898 | ||
899 | func_exit(); | |
900 | } | |
901 | ||
902 | ||
903 | /* Called with disabled interrupts */ | |
d2fbd0f2 | 904 | static int sx_setup_board(struct specialix_board *bp) |
1da177e4 LT |
905 | { |
906 | int error; | |
907 | ||
d61780c0 | 908 | if (bp->flags & SX_BOARD_ACTIVE) |
1da177e4 LT |
909 | return 0; |
910 | ||
911 | if (bp->flags & SX_BOARD_IS_PCI) | |
a72492bd AC |
912 | error = request_irq(bp->irq, sx_interrupt, |
913 | IRQF_DISABLED | IRQF_SHARED, "specialix IO8+", bp); | |
1da177e4 | 914 | else |
a72492bd AC |
915 | error = request_irq(bp->irq, sx_interrupt, |
916 | IRQF_DISABLED, "specialix IO8+", bp); | |
1da177e4 | 917 | |
d61780c0 | 918 | if (error) |
1da177e4 LT |
919 | return error; |
920 | ||
a72492bd | 921 | turn_ints_on(bp); |
1da177e4 LT |
922 | bp->flags |= SX_BOARD_ACTIVE; |
923 | ||
924 | return 0; | |
925 | } | |
926 | ||
927 | ||
928 | /* Called with disabled interrupts */ | |
d2fbd0f2 | 929 | static void sx_shutdown_board(struct specialix_board *bp) |
1da177e4 LT |
930 | { |
931 | func_enter(); | |
932 | ||
933 | if (!(bp->flags & SX_BOARD_ACTIVE)) { | |
934 | func_exit(); | |
935 | return; | |
936 | } | |
937 | ||
938 | bp->flags &= ~SX_BOARD_ACTIVE; | |
d61780c0 | 939 | |
a72492bd AC |
940 | dprintk(SX_DEBUG_IRQ, "Freeing IRQ%d for board %d.\n", |
941 | bp->irq, board_No(bp)); | |
1da177e4 | 942 | free_irq(bp->irq, bp); |
a72492bd | 943 | turn_ints_off(bp); |
1da177e4 LT |
944 | func_exit(); |
945 | } | |
946 | ||
d2fbd0f2 AC |
947 | static unsigned int sx_crtscts(struct tty_struct *tty) |
948 | { | |
949 | if (sx_rtscts) | |
950 | return C_CRTSCTS(tty); | |
951 | return 1; | |
952 | } | |
1da177e4 LT |
953 | |
954 | /* | |
d61780c0 | 955 | * Setting up port characteristics. |
1da177e4 LT |
956 | * Must be called with disabled interrupts |
957 | */ | |
a72492bd AC |
958 | static void sx_change_speed(struct specialix_board *bp, |
959 | struct specialix_port *port) | |
1da177e4 LT |
960 | { |
961 | struct tty_struct *tty; | |
962 | unsigned long baud; | |
963 | long tmp; | |
964 | unsigned char cor1 = 0, cor3 = 0; | |
965 | unsigned char mcor1 = 0, mcor2 = 0; | |
966 | static unsigned long again; | |
967 | unsigned long flags; | |
968 | ||
969 | func_enter(); | |
970 | ||
a72492bd AC |
971 | tty = port->port.tty; |
972 | if (!tty || !tty->termios) { | |
1da177e4 LT |
973 | func_exit(); |
974 | return; | |
975 | } | |
976 | ||
977 | port->IER = 0; | |
978 | port->COR2 = 0; | |
979 | /* Select port on the board */ | |
980 | spin_lock_irqsave(&bp->lock, flags); | |
981 | sx_out(bp, CD186x_CAR, port_No(port)); | |
982 | ||
983 | /* The Specialix board doens't implement the RTS lines. | |
984 | They are used to set the IRQ level. Don't touch them. */ | |
d2fbd0f2 | 985 | if (sx_crtscts(tty)) |
1da177e4 LT |
986 | port->MSVR = MSVR_DTR | (sx_in(bp, CD186x_MSVR) & MSVR_RTS); |
987 | else | |
988 | port->MSVR = (sx_in(bp, CD186x_MSVR) & MSVR_RTS); | |
989 | spin_unlock_irqrestore(&bp->lock, flags); | |
a72492bd | 990 | dprintk(SX_DEBUG_TERMIOS, "sx: got MSVR=%02x.\n", port->MSVR); |
67cc0161 | 991 | baud = tty_get_baud_rate(tty); |
d61780c0 | 992 | |
67cc0161 | 993 | if (baud == 38400) { |
44b7d1b3 | 994 | if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_HI) |
a4bb2cf1 | 995 | baud = 57600; |
44b7d1b3 | 996 | if ((port->port.flags & ASYNC_SPD_MASK) == ASYNC_SPD_VHI) |
a4bb2cf1 | 997 | baud = 115200; |
1da177e4 | 998 | } |
d61780c0 | 999 | |
67cc0161 | 1000 | if (!baud) { |
1da177e4 | 1001 | /* Drop DTR & exit */ |
a72492bd | 1002 | dprintk(SX_DEBUG_TERMIOS, "Dropping DTR... Hmm....\n"); |
d2fbd0f2 | 1003 | if (!sx_crtscts(tty)) { |
a72492bd | 1004 | port->MSVR &= ~MSVR_DTR; |
1da177e4 | 1005 | spin_lock_irqsave(&bp->lock, flags); |
a72492bd | 1006 | sx_out(bp, CD186x_MSVR, port->MSVR); |
1da177e4 | 1007 | spin_unlock_irqrestore(&bp->lock, flags); |
a72492bd AC |
1008 | } else |
1009 | dprintk(SX_DEBUG_TERMIOS, "Can't drop DTR: no DTR.\n"); | |
1da177e4 LT |
1010 | return; |
1011 | } else { | |
1012 | /* Set DTR on */ | |
d2fbd0f2 | 1013 | if (!sx_crtscts(tty)) |
a72492bd | 1014 | port->MSVR |= MSVR_DTR; |
1da177e4 | 1015 | } |
d61780c0 | 1016 | |
1da177e4 | 1017 | /* |
d61780c0 | 1018 | * Now we must calculate some speed depended things |
1da177e4 LT |
1019 | */ |
1020 | ||
1021 | /* Set baud rate for port */ | |
1022 | tmp = port->custom_divisor ; | |
a72492bd AC |
1023 | if (tmp) |
1024 | printk(KERN_INFO | |
1025 | "sx%d: Using custom baud rate divisor %ld. \n" | |
1026 | "This is an untested option, please be careful.\n", | |
1027 | port_No(port), tmp); | |
1da177e4 | 1028 | else |
a72492bd AC |
1029 | tmp = (((SX_OSCFREQ + baud/2) / baud + CD186x_TPC/2) / |
1030 | CD186x_TPC); | |
1da177e4 | 1031 | |
a72492bd | 1032 | if (tmp < 0x10 && time_before(again, jiffies)) { |
1da177e4 LT |
1033 | again = jiffies + HZ * 60; |
1034 | /* Page 48 of version 2.0 of the CL-CD1865 databook */ | |
1035 | if (tmp >= 12) { | |
a72492bd AC |
1036 | printk(KERN_INFO "sx%d: Baud rate divisor is %ld. \n" |
1037 | "Performance degradation is possible.\n" | |
1038 | "Read specialix.txt for more info.\n", | |
1039 | port_No(port), tmp); | |
1da177e4 | 1040 | } else { |
a72492bd AC |
1041 | printk(KERN_INFO "sx%d: Baud rate divisor is %ld. \n" |
1042 | "Warning: overstressing Cirrus chip. This might not work.\n" | |
1043 | "Read specialix.txt for more info.\n", port_No(port), tmp); | |
1da177e4 LT |
1044 | } |
1045 | } | |
1046 | spin_lock_irqsave(&bp->lock, flags); | |
d61780c0 JG |
1047 | sx_out(bp, CD186x_RBPRH, (tmp >> 8) & 0xff); |
1048 | sx_out(bp, CD186x_TBPRH, (tmp >> 8) & 0xff); | |
1049 | sx_out(bp, CD186x_RBPRL, tmp & 0xff); | |
1da177e4 LT |
1050 | sx_out(bp, CD186x_TBPRL, tmp & 0xff); |
1051 | spin_unlock_irqrestore(&bp->lock, flags); | |
a4bb2cf1 | 1052 | if (port->custom_divisor) |
a72492bd AC |
1053 | baud = (SX_OSCFREQ + port->custom_divisor/2) / |
1054 | port->custom_divisor; | |
a4bb2cf1 | 1055 | baud = (baud + 5) / 10; /* Estimated CPS */ |
1da177e4 LT |
1056 | |
1057 | /* Two timer ticks seems enough to wakeup something like SLIP driver */ | |
d61780c0 | 1058 | tmp = ((baud + HZ/2) / HZ) * 2 - CD186x_NFIFO; |
1da177e4 LT |
1059 | port->wakeup_chars = (tmp < 0) ? 0 : ((tmp >= SERIAL_XMIT_SIZE) ? |
1060 | SERIAL_XMIT_SIZE - 1 : tmp); | |
d61780c0 | 1061 | |
1da177e4 LT |
1062 | /* Receiver timeout will be transmission time for 1.5 chars */ |
1063 | tmp = (SPECIALIX_TPS + SPECIALIX_TPS/2 + baud/2) / baud; | |
1064 | tmp = (tmp > 0xff) ? 0xff : tmp; | |
1065 | spin_lock_irqsave(&bp->lock, flags); | |
1066 | sx_out(bp, CD186x_RTPR, tmp); | |
1067 | spin_unlock_irqrestore(&bp->lock, flags); | |
1068 | switch (C_CSIZE(tty)) { | |
a72492bd | 1069 | case CS5: |
1da177e4 LT |
1070 | cor1 |= COR1_5BITS; |
1071 | break; | |
a72492bd | 1072 | case CS6: |
1da177e4 LT |
1073 | cor1 |= COR1_6BITS; |
1074 | break; | |
a72492bd | 1075 | case CS7: |
1da177e4 LT |
1076 | cor1 |= COR1_7BITS; |
1077 | break; | |
a72492bd | 1078 | case CS8: |
1da177e4 LT |
1079 | cor1 |= COR1_8BITS; |
1080 | break; | |
1081 | } | |
d61780c0 JG |
1082 | |
1083 | if (C_CSTOPB(tty)) | |
1da177e4 | 1084 | cor1 |= COR1_2SB; |
d61780c0 | 1085 | |
1da177e4 LT |
1086 | cor1 |= COR1_IGNORE; |
1087 | if (C_PARENB(tty)) { | |
1088 | cor1 |= COR1_NORMPAR; | |
d61780c0 | 1089 | if (C_PARODD(tty)) |
1da177e4 | 1090 | cor1 |= COR1_ODDP; |
d61780c0 | 1091 | if (I_INPCK(tty)) |
1da177e4 LT |
1092 | cor1 &= ~COR1_IGNORE; |
1093 | } | |
1094 | /* Set marking of some errors */ | |
1095 | port->mark_mask = RCSR_OE | RCSR_TOUT; | |
d61780c0 | 1096 | if (I_INPCK(tty)) |
1da177e4 | 1097 | port->mark_mask |= RCSR_FE | RCSR_PE; |
d61780c0 | 1098 | if (I_BRKINT(tty) || I_PARMRK(tty)) |
1da177e4 | 1099 | port->mark_mask |= RCSR_BREAK; |
d61780c0 | 1100 | if (I_IGNPAR(tty)) |
1da177e4 LT |
1101 | port->mark_mask &= ~(RCSR_FE | RCSR_PE); |
1102 | if (I_IGNBRK(tty)) { | |
1103 | port->mark_mask &= ~RCSR_BREAK; | |
d61780c0 | 1104 | if (I_IGNPAR(tty)) |
1da177e4 LT |
1105 | /* Real raw mode. Ignore all */ |
1106 | port->mark_mask &= ~RCSR_OE; | |
1107 | } | |
1108 | /* Enable Hardware Flow Control */ | |
1109 | if (C_CRTSCTS(tty)) { | |
1110 | #ifdef SPECIALIX_BRAIN_DAMAGED_CTS | |
1111 | port->IER |= IER_DSR | IER_CTS; | |
1112 | mcor1 |= MCOR1_DSRZD | MCOR1_CTSZD; | |
1113 | mcor2 |= MCOR2_DSROD | MCOR2_CTSOD; | |
1114 | spin_lock_irqsave(&bp->lock, flags); | |
a72492bd AC |
1115 | tty->hw_stopped = !(sx_in(bp, CD186x_MSVR) & |
1116 | (MSVR_CTS|MSVR_DSR)); | |
1da177e4 LT |
1117 | spin_unlock_irqrestore(&bp->lock, flags); |
1118 | #else | |
d61780c0 | 1119 | port->COR2 |= COR2_CTSAE; |
1da177e4 LT |
1120 | #endif |
1121 | } | |
1122 | /* Enable Software Flow Control. FIXME: I'm not sure about this */ | |
1123 | /* Some people reported that it works, but I still doubt it */ | |
1124 | if (I_IXON(tty)) { | |
1125 | port->COR2 |= COR2_TXIBE; | |
1126 | cor3 |= (COR3_FCT | COR3_SCDE); | |
1127 | if (I_IXANY(tty)) | |
1128 | port->COR2 |= COR2_IXM; | |
1129 | spin_lock_irqsave(&bp->lock, flags); | |
1130 | sx_out(bp, CD186x_SCHR1, START_CHAR(tty)); | |
1131 | sx_out(bp, CD186x_SCHR2, STOP_CHAR(tty)); | |
1132 | sx_out(bp, CD186x_SCHR3, START_CHAR(tty)); | |
1133 | sx_out(bp, CD186x_SCHR4, STOP_CHAR(tty)); | |
1134 | spin_unlock_irqrestore(&bp->lock, flags); | |
1135 | } | |
1136 | if (!C_CLOCAL(tty)) { | |
1137 | /* Enable CD check */ | |
1138 | port->IER |= IER_CD; | |
1139 | mcor1 |= MCOR1_CDZD; | |
1140 | mcor2 |= MCOR2_CDOD; | |
1141 | } | |
d61780c0 JG |
1142 | |
1143 | if (C_CREAD(tty)) | |
1da177e4 LT |
1144 | /* Enable receiver */ |
1145 | port->IER |= IER_RXD; | |
d61780c0 | 1146 | |
1da177e4 LT |
1147 | /* Set input FIFO size (1-8 bytes) */ |
1148 | cor3 |= sx_rxfifo; | |
1149 | /* Setting up CD186x channel registers */ | |
1150 | spin_lock_irqsave(&bp->lock, flags); | |
1151 | sx_out(bp, CD186x_COR1, cor1); | |
1152 | sx_out(bp, CD186x_COR2, port->COR2); | |
1153 | sx_out(bp, CD186x_COR3, cor3); | |
1154 | spin_unlock_irqrestore(&bp->lock, flags); | |
1155 | /* Make CD186x know about registers change */ | |
1156 | sx_wait_CCR(bp); | |
1157 | spin_lock_irqsave(&bp->lock, flags); | |
1158 | sx_out(bp, CD186x_CCR, CCR_CORCHG1 | CCR_CORCHG2 | CCR_CORCHG3); | |
1159 | /* Setting up modem option registers */ | |
a72492bd AC |
1160 | dprintk(SX_DEBUG_TERMIOS, "Mcor1 = %02x, mcor2 = %02x.\n", |
1161 | mcor1, mcor2); | |
1da177e4 LT |
1162 | sx_out(bp, CD186x_MCOR1, mcor1); |
1163 | sx_out(bp, CD186x_MCOR2, mcor2); | |
1164 | spin_unlock_irqrestore(&bp->lock, flags); | |
1165 | /* Enable CD186x transmitter & receiver */ | |
1166 | sx_wait_CCR(bp); | |
1167 | spin_lock_irqsave(&bp->lock, flags); | |
1168 | sx_out(bp, CD186x_CCR, CCR_TXEN | CCR_RXEN); | |
1169 | /* Enable interrupts */ | |
1170 | sx_out(bp, CD186x_IER, port->IER); | |
1171 | /* And finally set the modem lines... */ | |
1172 | sx_out(bp, CD186x_MSVR, port->MSVR); | |
1173 | spin_unlock_irqrestore(&bp->lock, flags); | |
1174 | ||
1175 | func_exit(); | |
1176 | } | |
1177 | ||
1178 | ||
1179 | /* Must be called with interrupts enabled */ | |
a72492bd AC |
1180 | static int sx_setup_port(struct specialix_board *bp, |
1181 | struct specialix_port *port) | |
1da177e4 LT |
1182 | { |
1183 | unsigned long flags; | |
1184 | ||
1185 | func_enter(); | |
1186 | ||
44b7d1b3 | 1187 | if (port->port.flags & ASYNC_INITIALIZED) { |
1da177e4 LT |
1188 | func_exit(); |
1189 | return 0; | |
1190 | } | |
d61780c0 | 1191 | |
1da177e4 LT |
1192 | if (!port->xmit_buf) { |
1193 | /* We may sleep in get_zeroed_page() */ | |
1194 | unsigned long tmp; | |
d61780c0 | 1195 | |
a72492bd AC |
1196 | tmp = get_zeroed_page(GFP_KERNEL); |
1197 | if (tmp == 0L) { | |
1da177e4 LT |
1198 | func_exit(); |
1199 | return -ENOMEM; | |
1200 | } | |
1201 | ||
1202 | if (port->xmit_buf) { | |
1203 | free_page(tmp); | |
1204 | func_exit(); | |
1205 | return -ERESTARTSYS; | |
1206 | } | |
1207 | port->xmit_buf = (unsigned char *) tmp; | |
1208 | } | |
d61780c0 | 1209 | |
1da177e4 LT |
1210 | spin_lock_irqsave(&port->lock, flags); |
1211 | ||
44b7d1b3 AC |
1212 | if (port->port.tty) |
1213 | clear_bit(TTY_IO_ERROR, &port->port.tty->flags); | |
1da177e4 LT |
1214 | |
1215 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; | |
1216 | sx_change_speed(bp, port); | |
44b7d1b3 | 1217 | port->port.flags |= ASYNC_INITIALIZED; |
1da177e4 LT |
1218 | |
1219 | spin_unlock_irqrestore(&port->lock, flags); | |
1220 | ||
d61780c0 | 1221 | |
1da177e4 LT |
1222 | func_exit(); |
1223 | return 0; | |
1224 | } | |
1225 | ||
1226 | ||
1227 | /* Must be called with interrupts disabled */ | |
a72492bd AC |
1228 | static void sx_shutdown_port(struct specialix_board *bp, |
1229 | struct specialix_port *port) | |
1da177e4 LT |
1230 | { |
1231 | struct tty_struct *tty; | |
1232 | int i; | |
1233 | unsigned long flags; | |
d61780c0 | 1234 | |
1da177e4 LT |
1235 | func_enter(); |
1236 | ||
44b7d1b3 | 1237 | if (!(port->port.flags & ASYNC_INITIALIZED)) { |
1da177e4 LT |
1238 | func_exit(); |
1239 | return; | |
1240 | } | |
d61780c0 | 1241 | |
1da177e4 | 1242 | if (sx_debug & SX_DEBUG_FIFO) { |
a72492bd AC |
1243 | dprintk(SX_DEBUG_FIFO, |
1244 | "sx%d: port %d: %ld overruns, FIFO hits [ ", | |
1245 | board_No(bp), port_No(port), port->overrun); | |
1246 | for (i = 0; i < 10; i++) | |
1da177e4 | 1247 | dprintk(SX_DEBUG_FIFO, "%ld ", port->hits[i]); |
1da177e4 LT |
1248 | dprintk(SX_DEBUG_FIFO, "].\n"); |
1249 | } | |
1250 | ||
1251 | if (port->xmit_buf) { | |
1252 | free_page((unsigned long) port->xmit_buf); | |
1253 | port->xmit_buf = NULL; | |
1254 | } | |
1255 | ||
1256 | /* Select port */ | |
1257 | spin_lock_irqsave(&bp->lock, flags); | |
1258 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1259 | ||
a72492bd AC |
1260 | tty = port->port.tty; |
1261 | if (tty == NULL || C_HUPCL(tty)) { | |
1da177e4 LT |
1262 | /* Drop DTR */ |
1263 | sx_out(bp, CD186x_MSVDTR, 0); | |
1264 | } | |
1265 | spin_unlock_irqrestore(&bp->lock, flags); | |
1266 | /* Reset port */ | |
1267 | sx_wait_CCR(bp); | |
1268 | spin_lock_irqsave(&bp->lock, flags); | |
1269 | sx_out(bp, CD186x_CCR, CCR_SOFTRESET); | |
1270 | /* Disable all interrupts from this port */ | |
1271 | port->IER = 0; | |
1272 | sx_out(bp, CD186x_IER, port->IER); | |
1273 | spin_unlock_irqrestore(&bp->lock, flags); | |
1274 | if (tty) | |
1275 | set_bit(TTY_IO_ERROR, &tty->flags); | |
44b7d1b3 | 1276 | port->port.flags &= ~ASYNC_INITIALIZED; |
d61780c0 JG |
1277 | |
1278 | if (!bp->count) | |
1da177e4 LT |
1279 | sx_shutdown_board(bp); |
1280 | func_exit(); | |
1281 | } | |
1282 | ||
d61780c0 | 1283 | |
a72492bd AC |
1284 | static int block_til_ready(struct tty_struct *tty, struct file *filp, |
1285 | struct specialix_port *port) | |
1da177e4 LT |
1286 | { |
1287 | DECLARE_WAITQUEUE(wait, current); | |
1288 | struct specialix_board *bp = port_Board(port); | |
1289 | int retval; | |
1290 | int do_clocal = 0; | |
1291 | int CD; | |
1292 | unsigned long flags; | |
1293 | ||
1294 | func_enter(); | |
1295 | ||
1296 | /* | |
1297 | * If the device is in the middle of being closed, then block | |
1298 | * until it's done, and then try again. | |
1299 | */ | |
44b7d1b3 AC |
1300 | if (tty_hung_up_p(filp) || port->port.flags & ASYNC_CLOSING) { |
1301 | interruptible_sleep_on(&port->port.close_wait); | |
1302 | if (port->port.flags & ASYNC_HUP_NOTIFY) { | |
1da177e4 LT |
1303 | func_exit(); |
1304 | return -EAGAIN; | |
1305 | } else { | |
1306 | func_exit(); | |
1307 | return -ERESTARTSYS; | |
1308 | } | |
1309 | } | |
d61780c0 | 1310 | |
1da177e4 LT |
1311 | /* |
1312 | * If non-blocking mode is set, or the port is not enabled, | |
1313 | * then make the check up front and then exit. | |
1314 | */ | |
1315 | if ((filp->f_flags & O_NONBLOCK) || | |
1316 | (tty->flags & (1 << TTY_IO_ERROR))) { | |
44b7d1b3 | 1317 | port->port.flags |= ASYNC_NORMAL_ACTIVE; |
1da177e4 LT |
1318 | func_exit(); |
1319 | return 0; | |
1320 | } | |
1321 | ||
1322 | if (C_CLOCAL(tty)) | |
1323 | do_clocal = 1; | |
1324 | ||
1325 | /* | |
1326 | * Block waiting for the carrier detect and the line to become | |
1327 | * free (i.e., not in use by the callout). While we are in | |
1328 | * this loop, info->count is dropped by one, so that | |
1329 | * rs_close() knows when to free things. We restore it upon | |
1330 | * exit, either normal or abnormal. | |
1331 | */ | |
1332 | retval = 0; | |
44b7d1b3 | 1333 | add_wait_queue(&port->port.open_wait, &wait); |
1da177e4 | 1334 | spin_lock_irqsave(&port->lock, flags); |
a72492bd | 1335 | if (!tty_hung_up_p(filp)) |
44b7d1b3 | 1336 | port->port.count--; |
1da177e4 | 1337 | spin_unlock_irqrestore(&port->lock, flags); |
44b7d1b3 | 1338 | port->port.blocked_open++; |
1da177e4 LT |
1339 | while (1) { |
1340 | spin_lock_irqsave(&bp->lock, flags); | |
1341 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1342 | CD = sx_in(bp, CD186x_MSVR) & MSVR_CD; | |
d2fbd0f2 | 1343 | if (sx_crtscts(tty)) { |
1da177e4 LT |
1344 | /* Activate RTS */ |
1345 | port->MSVR |= MSVR_DTR; /* WTF? */ | |
a72492bd | 1346 | sx_out(bp, CD186x_MSVR, port->MSVR); |
1da177e4 LT |
1347 | } else { |
1348 | /* Activate DTR */ | |
1349 | port->MSVR |= MSVR_DTR; | |
a72492bd | 1350 | sx_out(bp, CD186x_MSVR, port->MSVR); |
1da177e4 LT |
1351 | } |
1352 | spin_unlock_irqrestore(&bp->lock, flags); | |
1353 | set_current_state(TASK_INTERRUPTIBLE); | |
1354 | if (tty_hung_up_p(filp) || | |
44b7d1b3 AC |
1355 | !(port->port.flags & ASYNC_INITIALIZED)) { |
1356 | if (port->port.flags & ASYNC_HUP_NOTIFY) | |
1da177e4 LT |
1357 | retval = -EAGAIN; |
1358 | else | |
d61780c0 | 1359 | retval = -ERESTARTSYS; |
1da177e4 LT |
1360 | break; |
1361 | } | |
44b7d1b3 | 1362 | if (!(port->port.flags & ASYNC_CLOSING) && |
1da177e4 LT |
1363 | (do_clocal || CD)) |
1364 | break; | |
1365 | if (signal_pending(current)) { | |
1366 | retval = -ERESTARTSYS; | |
1367 | break; | |
1368 | } | |
1369 | schedule(); | |
1370 | } | |
1371 | ||
1372 | set_current_state(TASK_RUNNING); | |
44b7d1b3 | 1373 | remove_wait_queue(&port->port.open_wait, &wait); |
1da177e4 | 1374 | spin_lock_irqsave(&port->lock, flags); |
a72492bd | 1375 | if (!tty_hung_up_p(filp)) |
44b7d1b3 | 1376 | port->port.count++; |
44b7d1b3 | 1377 | port->port.blocked_open--; |
1da177e4 LT |
1378 | spin_unlock_irqrestore(&port->lock, flags); |
1379 | if (retval) { | |
1380 | func_exit(); | |
1381 | return retval; | |
1382 | } | |
1383 | ||
44b7d1b3 | 1384 | port->port.flags |= ASYNC_NORMAL_ACTIVE; |
1da177e4 LT |
1385 | func_exit(); |
1386 | return 0; | |
d61780c0 | 1387 | } |
1da177e4 LT |
1388 | |
1389 | ||
a72492bd | 1390 | static int sx_open(struct tty_struct *tty, struct file *filp) |
1da177e4 LT |
1391 | { |
1392 | int board; | |
1393 | int error; | |
a72492bd AC |
1394 | struct specialix_port *port; |
1395 | struct specialix_board *bp; | |
1da177e4 LT |
1396 | int i; |
1397 | unsigned long flags; | |
1398 | ||
1399 | func_enter(); | |
1400 | ||
1401 | board = SX_BOARD(tty->index); | |
1402 | ||
1403 | if (board >= SX_NBOARD || !(sx_board[board].flags & SX_BOARD_PRESENT)) { | |
1404 | func_exit(); | |
1405 | return -ENODEV; | |
1406 | } | |
d61780c0 | 1407 | |
1da177e4 LT |
1408 | bp = &sx_board[board]; |
1409 | port = sx_port + board * SX_NPORT + SX_PORT(tty->index); | |
1410 | port->overrun = 0; | |
1411 | for (i = 0; i < 10; i++) | |
a72492bd | 1412 | port->hits[i] = 0; |
1da177e4 | 1413 | |
a72492bd AC |
1414 | dprintk(SX_DEBUG_OPEN, |
1415 | "Board = %d, bp = %p, port = %p, portno = %d.\n", | |
1416 | board, bp, port, SX_PORT(tty->index)); | |
1da177e4 LT |
1417 | |
1418 | if (sx_paranoia_check(port, tty->name, "sx_open")) { | |
1419 | func_enter(); | |
1420 | return -ENODEV; | |
1421 | } | |
1422 | ||
a72492bd AC |
1423 | error = sx_setup_board(bp); |
1424 | if (error) { | |
1da177e4 LT |
1425 | func_exit(); |
1426 | return error; | |
1427 | } | |
1428 | ||
1429 | spin_lock_irqsave(&bp->lock, flags); | |
44b7d1b3 | 1430 | port->port.count++; |
1da177e4 LT |
1431 | bp->count++; |
1432 | tty->driver_data = port; | |
44b7d1b3 | 1433 | port->port.tty = tty; |
1da177e4 LT |
1434 | spin_unlock_irqrestore(&bp->lock, flags); |
1435 | ||
a72492bd AC |
1436 | error = sx_setup_port(bp, port); |
1437 | if (error) { | |
1da177e4 LT |
1438 | func_enter(); |
1439 | return error; | |
1440 | } | |
d61780c0 | 1441 | |
a72492bd AC |
1442 | error = block_til_ready(tty, filp, port); |
1443 | if (error) { | |
1da177e4 LT |
1444 | func_enter(); |
1445 | return error; | |
1446 | } | |
1447 | ||
1448 | func_exit(); | |
1449 | return 0; | |
1450 | } | |
1451 | ||
978e595f AC |
1452 | static void sx_flush_buffer(struct tty_struct *tty) |
1453 | { | |
c9f19e96 | 1454 | struct specialix_port *port = tty->driver_data; |
978e595f | 1455 | unsigned long flags; |
a72492bd | 1456 | struct specialix_board *bp; |
978e595f AC |
1457 | |
1458 | func_enter(); | |
1459 | ||
1460 | if (sx_paranoia_check(port, tty->name, "sx_flush_buffer")) { | |
1461 | func_exit(); | |
1462 | return; | |
1463 | } | |
1464 | ||
1465 | bp = port_Board(port); | |
1466 | spin_lock_irqsave(&port->lock, flags); | |
1467 | port->xmit_cnt = port->xmit_head = port->xmit_tail = 0; | |
1468 | spin_unlock_irqrestore(&port->lock, flags); | |
1469 | tty_wakeup(tty); | |
1470 | ||
1471 | func_exit(); | |
1472 | } | |
1da177e4 | 1473 | |
a72492bd | 1474 | static void sx_close(struct tty_struct *tty, struct file *filp) |
1da177e4 | 1475 | { |
c9f19e96 | 1476 | struct specialix_port *port = tty->driver_data; |
1da177e4 LT |
1477 | struct specialix_board *bp; |
1478 | unsigned long flags; | |
1479 | unsigned long timeout; | |
d61780c0 | 1480 | |
1da177e4 LT |
1481 | func_enter(); |
1482 | if (!port || sx_paranoia_check(port, tty->name, "close")) { | |
1483 | func_exit(); | |
1484 | return; | |
1485 | } | |
1486 | spin_lock_irqsave(&port->lock, flags); | |
1487 | ||
1488 | if (tty_hung_up_p(filp)) { | |
1489 | spin_unlock_irqrestore(&port->lock, flags); | |
1490 | func_exit(); | |
1491 | return; | |
1492 | } | |
d61780c0 | 1493 | |
1da177e4 | 1494 | bp = port_Board(port); |
d2fbd0f2 | 1495 | if (tty->count == 1 && port->port.count != 1) { |
1da177e4 LT |
1496 | printk(KERN_ERR "sx%d: sx_close: bad port count;" |
1497 | " tty->count is 1, port count is %d\n", | |
44b7d1b3 AC |
1498 | board_No(bp), port->port.count); |
1499 | port->port.count = 1; | |
1da177e4 LT |
1500 | } |
1501 | ||
44b7d1b3 AC |
1502 | if (port->port.count > 1) { |
1503 | port->port.count--; | |
1da177e4 LT |
1504 | bp->count--; |
1505 | ||
1506 | spin_unlock_irqrestore(&port->lock, flags); | |
1507 | ||
1508 | func_exit(); | |
1509 | return; | |
1510 | } | |
44b7d1b3 | 1511 | port->port.flags |= ASYNC_CLOSING; |
1da177e4 | 1512 | /* |
d61780c0 | 1513 | * Now we wait for the transmit buffer to clear; and we notify |
1da177e4 LT |
1514 | * the line discipline to only process XON/XOFF characters. |
1515 | */ | |
1516 | tty->closing = 1; | |
1517 | spin_unlock_irqrestore(&port->lock, flags); | |
a72492bd AC |
1518 | dprintk(SX_DEBUG_OPEN, "Closing\n"); |
1519 | if (port->port.closing_wait != ASYNC_CLOSING_WAIT_NONE) | |
44b7d1b3 | 1520 | tty_wait_until_sent(tty, port->port.closing_wait); |
1da177e4 LT |
1521 | /* |
1522 | * At this point we stop accepting input. To do this, we | |
1523 | * disable the receive line status interrupts, and tell the | |
1524 | * interrupt driver to stop checking the data ready bit in the | |
1525 | * line status register. | |
1526 | */ | |
a72492bd | 1527 | dprintk(SX_DEBUG_OPEN, "Closed\n"); |
1da177e4 | 1528 | port->IER &= ~IER_RXD; |
44b7d1b3 | 1529 | if (port->port.flags & ASYNC_INITIALIZED) { |
1da177e4 LT |
1530 | port->IER &= ~IER_TXRDY; |
1531 | port->IER |= IER_TXEMPTY; | |
1532 | spin_lock_irqsave(&bp->lock, flags); | |
1533 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1534 | sx_out(bp, CD186x_IER, port->IER); | |
1535 | spin_unlock_irqrestore(&bp->lock, flags); | |
1536 | /* | |
1537 | * Before we drop DTR, make sure the UART transmitter | |
1538 | * has completely drained; this is especially | |
1539 | * important if there is a transmit FIFO! | |
1540 | */ | |
1541 | timeout = jiffies+HZ; | |
a72492bd AC |
1542 | while (port->IER & IER_TXEMPTY) { |
1543 | set_current_state(TASK_INTERRUPTIBLE); | |
1da177e4 LT |
1544 | msleep_interruptible(jiffies_to_msecs(port->timeout)); |
1545 | if (time_after(jiffies, timeout)) { | |
a72492bd | 1546 | printk(KERN_INFO "Timeout waiting for close\n"); |
1da177e4 LT |
1547 | break; |
1548 | } | |
1549 | } | |
1550 | ||
1551 | } | |
1552 | ||
1553 | if (--bp->count < 0) { | |
a72492bd AC |
1554 | printk(KERN_ERR |
1555 | "sx%d: sx_shutdown_port: bad board count: %d port: %d\n", | |
1556 | board_No(bp), bp->count, tty->index); | |
1da177e4 LT |
1557 | bp->count = 0; |
1558 | } | |
44b7d1b3 | 1559 | if (--port->port.count < 0) { |
a72492bd AC |
1560 | printk(KERN_ERR |
1561 | "sx%d: sx_close: bad port count for tty%d: %d\n", | |
1562 | board_No(bp), port_No(port), port->port.count); | |
44b7d1b3 | 1563 | port->port.count = 0; |
1da177e4 LT |
1564 | } |
1565 | ||
1566 | sx_shutdown_port(bp, port); | |
978e595f | 1567 | sx_flush_buffer(tty); |
1da177e4 LT |
1568 | tty_ldisc_flush(tty); |
1569 | spin_lock_irqsave(&port->lock, flags); | |
1570 | tty->closing = 0; | |
44b7d1b3 | 1571 | port->port.tty = NULL; |
1da177e4 | 1572 | spin_unlock_irqrestore(&port->lock, flags); |
44b7d1b3 | 1573 | if (port->port.blocked_open) { |
a72492bd AC |
1574 | if (port->port.close_delay) |
1575 | msleep_interruptible( | |
1576 | jiffies_to_msecs(port->port.close_delay)); | |
44b7d1b3 | 1577 | wake_up_interruptible(&port->port.open_wait); |
1da177e4 | 1578 | } |
44b7d1b3 AC |
1579 | port->port.flags &= ~(ASYNC_NORMAL_ACTIVE|ASYNC_CLOSING); |
1580 | wake_up_interruptible(&port->port.close_wait); | |
1da177e4 LT |
1581 | |
1582 | func_exit(); | |
1583 | } | |
1584 | ||
1585 | ||
a72492bd AC |
1586 | static int sx_write(struct tty_struct *tty, |
1587 | const unsigned char *buf, int count) | |
1da177e4 | 1588 | { |
c9f19e96 | 1589 | struct specialix_port *port = tty->driver_data; |
1da177e4 LT |
1590 | struct specialix_board *bp; |
1591 | int c, total = 0; | |
1592 | unsigned long flags; | |
1593 | ||
1594 | func_enter(); | |
1595 | if (sx_paranoia_check(port, tty->name, "sx_write")) { | |
1596 | func_exit(); | |
1597 | return 0; | |
1598 | } | |
d61780c0 | 1599 | |
1da177e4 LT |
1600 | bp = port_Board(port); |
1601 | ||
365e0223 | 1602 | if (!port->xmit_buf) { |
1da177e4 LT |
1603 | func_exit(); |
1604 | return 0; | |
1605 | } | |
1606 | ||
1607 | while (1) { | |
1608 | spin_lock_irqsave(&port->lock, flags); | |
1609 | c = min_t(int, count, min(SERIAL_XMIT_SIZE - port->xmit_cnt - 1, | |
1610 | SERIAL_XMIT_SIZE - port->xmit_head)); | |
1611 | if (c <= 0) { | |
1612 | spin_unlock_irqrestore(&port->lock, flags); | |
1613 | break; | |
1614 | } | |
1615 | memcpy(port->xmit_buf + port->xmit_head, buf, c); | |
1616 | port->xmit_head = (port->xmit_head + c) & (SERIAL_XMIT_SIZE-1); | |
1617 | port->xmit_cnt += c; | |
1618 | spin_unlock_irqrestore(&port->lock, flags); | |
1619 | ||
1620 | buf += c; | |
1621 | count -= c; | |
1622 | total += c; | |
1623 | } | |
1624 | ||
1625 | spin_lock_irqsave(&bp->lock, flags); | |
1626 | if (port->xmit_cnt && !tty->stopped && !tty->hw_stopped && | |
1627 | !(port->IER & IER_TXRDY)) { | |
1628 | port->IER |= IER_TXRDY; | |
1629 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1630 | sx_out(bp, CD186x_IER, port->IER); | |
1631 | } | |
1632 | spin_unlock_irqrestore(&bp->lock, flags); | |
1633 | func_exit(); | |
1634 | ||
1635 | return total; | |
1636 | } | |
1637 | ||
1638 | ||
a72492bd | 1639 | static int sx_put_char(struct tty_struct *tty, unsigned char ch) |
1da177e4 | 1640 | { |
c9f19e96 | 1641 | struct specialix_port *port = tty->driver_data; |
1da177e4 | 1642 | unsigned long flags; |
a72492bd | 1643 | struct specialix_board *bp; |
1da177e4 LT |
1644 | |
1645 | func_enter(); | |
1646 | ||
1647 | if (sx_paranoia_check(port, tty->name, "sx_put_char")) { | |
1648 | func_exit(); | |
6ae04576 | 1649 | return 0; |
1da177e4 | 1650 | } |
a72492bd | 1651 | dprintk(SX_DEBUG_TX, "check tty: %p %p\n", tty, port->xmit_buf); |
326f28e9 | 1652 | if (!port->xmit_buf) { |
1da177e4 | 1653 | func_exit(); |
6ae04576 | 1654 | return 0; |
1da177e4 LT |
1655 | } |
1656 | bp = port_Board(port); | |
1657 | spin_lock_irqsave(&port->lock, flags); | |
1658 | ||
a72492bd AC |
1659 | dprintk(SX_DEBUG_TX, "xmit_cnt: %d xmit_buf: %p\n", |
1660 | port->xmit_cnt, port->xmit_buf); | |
1661 | if (port->xmit_cnt >= SERIAL_XMIT_SIZE - 1 || !port->xmit_buf) { | |
1da177e4 | 1662 | spin_unlock_irqrestore(&port->lock, flags); |
a72492bd | 1663 | dprintk(SX_DEBUG_TX, "Exit size\n"); |
1da177e4 | 1664 | func_exit(); |
6ae04576 | 1665 | return 0; |
1da177e4 | 1666 | } |
a72492bd | 1667 | dprintk(SX_DEBUG_TX, "Handle xmit: %p %p\n", port, port->xmit_buf); |
1da177e4 LT |
1668 | port->xmit_buf[port->xmit_head++] = ch; |
1669 | port->xmit_head &= SERIAL_XMIT_SIZE - 1; | |
1670 | port->xmit_cnt++; | |
1671 | spin_unlock_irqrestore(&port->lock, flags); | |
1672 | ||
1673 | func_exit(); | |
6ae04576 | 1674 | return 1; |
1da177e4 LT |
1675 | } |
1676 | ||
1677 | ||
a72492bd | 1678 | static void sx_flush_chars(struct tty_struct *tty) |
1da177e4 | 1679 | { |
c9f19e96 | 1680 | struct specialix_port *port = tty->driver_data; |
1da177e4 | 1681 | unsigned long flags; |
a72492bd | 1682 | struct specialix_board *bp = port_Board(port); |
1da177e4 LT |
1683 | |
1684 | func_enter(); | |
1685 | ||
1686 | if (sx_paranoia_check(port, tty->name, "sx_flush_chars")) { | |
1687 | func_exit(); | |
1688 | return; | |
1689 | } | |
1690 | if (port->xmit_cnt <= 0 || tty->stopped || tty->hw_stopped || | |
1691 | !port->xmit_buf) { | |
1692 | func_exit(); | |
1693 | return; | |
1694 | } | |
1695 | spin_lock_irqsave(&bp->lock, flags); | |
1696 | port->IER |= IER_TXRDY; | |
1697 | sx_out(port_Board(port), CD186x_CAR, port_No(port)); | |
1698 | sx_out(port_Board(port), CD186x_IER, port->IER); | |
1699 | spin_unlock_irqrestore(&bp->lock, flags); | |
1700 | ||
1701 | func_exit(); | |
1702 | } | |
1703 | ||
1704 | ||
a72492bd | 1705 | static int sx_write_room(struct tty_struct *tty) |
1da177e4 | 1706 | { |
c9f19e96 | 1707 | struct specialix_port *port = tty->driver_data; |
1da177e4 LT |
1708 | int ret; |
1709 | ||
1710 | func_enter(); | |
1711 | ||
1712 | if (sx_paranoia_check(port, tty->name, "sx_write_room")) { | |
1713 | func_exit(); | |
1714 | return 0; | |
1715 | } | |
1716 | ||
1717 | ret = SERIAL_XMIT_SIZE - port->xmit_cnt - 1; | |
1718 | if (ret < 0) | |
1719 | ret = 0; | |
1720 | ||
1721 | func_exit(); | |
1722 | return ret; | |
1723 | } | |
1724 | ||
1725 | ||
1726 | static int sx_chars_in_buffer(struct tty_struct *tty) | |
1727 | { | |
c9f19e96 | 1728 | struct specialix_port *port = tty->driver_data; |
1da177e4 LT |
1729 | |
1730 | func_enter(); | |
d61780c0 | 1731 | |
1da177e4 LT |
1732 | if (sx_paranoia_check(port, tty->name, "sx_chars_in_buffer")) { |
1733 | func_exit(); | |
1734 | return 0; | |
1735 | } | |
1736 | func_exit(); | |
1737 | return port->xmit_cnt; | |
1738 | } | |
1739 | ||
1da177e4 LT |
1740 | static int sx_tiocmget(struct tty_struct *tty, struct file *file) |
1741 | { | |
c9f19e96 | 1742 | struct specialix_port *port = tty->driver_data; |
a72492bd | 1743 | struct specialix_board *bp; |
1da177e4 LT |
1744 | unsigned char status; |
1745 | unsigned int result; | |
1746 | unsigned long flags; | |
1747 | ||
1748 | func_enter(); | |
1749 | ||
bf9d8929 | 1750 | if (sx_paranoia_check(port, tty->name, __func__)) { |
1da177e4 LT |
1751 | func_exit(); |
1752 | return -ENODEV; | |
1753 | } | |
1754 | ||
1755 | bp = port_Board(port); | |
a72492bd | 1756 | spin_lock_irqsave(&bp->lock, flags); |
1da177e4 LT |
1757 | sx_out(bp, CD186x_CAR, port_No(port)); |
1758 | status = sx_in(bp, CD186x_MSVR); | |
1759 | spin_unlock_irqrestore(&bp->lock, flags); | |
a72492bd AC |
1760 | dprintk(SX_DEBUG_INIT, "Got msvr[%d] = %02x, car = %d.\n", |
1761 | port_No(port), status, sx_in(bp, CD186x_CAR)); | |
1762 | dprintk(SX_DEBUG_INIT, "sx_port = %p, port = %p\n", sx_port, port); | |
d2fbd0f2 AC |
1763 | if (sx_crtscts(port->port.tty)) { |
1764 | result = TIOCM_DTR | TIOCM_DSR | |
a72492bd AC |
1765 | | ((status & MSVR_DTR) ? TIOCM_RTS : 0) |
1766 | | ((status & MSVR_CD) ? TIOCM_CAR : 0) | |
a72492bd | 1767 | | ((status & MSVR_CTS) ? TIOCM_CTS : 0); |
1da177e4 | 1768 | } else { |
d2fbd0f2 | 1769 | result = TIOCM_RTS | TIOCM_DSR |
a72492bd AC |
1770 | | ((status & MSVR_DTR) ? TIOCM_DTR : 0) |
1771 | | ((status & MSVR_CD) ? TIOCM_CAR : 0) | |
a72492bd | 1772 | | ((status & MSVR_CTS) ? TIOCM_CTS : 0); |
1da177e4 LT |
1773 | } |
1774 | ||
1775 | func_exit(); | |
1776 | ||
1777 | return result; | |
1778 | } | |
1779 | ||
1780 | ||
1781 | static int sx_tiocmset(struct tty_struct *tty, struct file *file, | |
1782 | unsigned int set, unsigned int clear) | |
1783 | { | |
c9f19e96 | 1784 | struct specialix_port *port = tty->driver_data; |
1da177e4 LT |
1785 | unsigned long flags; |
1786 | struct specialix_board *bp; | |
1787 | ||
1788 | func_enter(); | |
1789 | ||
bf9d8929 | 1790 | if (sx_paranoia_check(port, tty->name, __func__)) { |
1da177e4 LT |
1791 | func_exit(); |
1792 | return -ENODEV; | |
1793 | } | |
1794 | ||
1795 | bp = port_Board(port); | |
1796 | ||
1797 | spin_lock_irqsave(&port->lock, flags); | |
d2fbd0f2 | 1798 | if (sx_crtscts(port->port.tty)) { |
1da177e4 LT |
1799 | if (set & TIOCM_RTS) |
1800 | port->MSVR |= MSVR_DTR; | |
1801 | } else { | |
1802 | if (set & TIOCM_DTR) | |
1803 | port->MSVR |= MSVR_DTR; | |
1804 | } | |
d2fbd0f2 | 1805 | if (sx_crtscts(port->port.tty)) { |
1da177e4 LT |
1806 | if (clear & TIOCM_RTS) |
1807 | port->MSVR &= ~MSVR_DTR; | |
1808 | } else { | |
1809 | if (clear & TIOCM_DTR) | |
1810 | port->MSVR &= ~MSVR_DTR; | |
1811 | } | |
25470256 | 1812 | spin_lock(&bp->lock); |
1da177e4 LT |
1813 | sx_out(bp, CD186x_CAR, port_No(port)); |
1814 | sx_out(bp, CD186x_MSVR, port->MSVR); | |
25470256 | 1815 | spin_unlock(&bp->lock); |
1da177e4 LT |
1816 | spin_unlock_irqrestore(&port->lock, flags); |
1817 | func_exit(); | |
1818 | return 0; | |
1819 | } | |
1820 | ||
1821 | ||
faa7612c | 1822 | static int sx_send_break(struct tty_struct *tty, int length) |
1da177e4 | 1823 | { |
c9f19e96 | 1824 | struct specialix_port *port = tty->driver_data; |
1da177e4 LT |
1825 | struct specialix_board *bp = port_Board(port); |
1826 | unsigned long flags; | |
d61780c0 | 1827 | |
1da177e4 | 1828 | func_enter(); |
faa7612c AC |
1829 | if (length == 0 || length == -1) |
1830 | return -EOPNOTSUPP; | |
1da177e4 | 1831 | |
a72492bd | 1832 | spin_lock_irqsave(&port->lock, flags); |
1da177e4 LT |
1833 | port->break_length = SPECIALIX_TPS / HZ * length; |
1834 | port->COR2 |= COR2_ETC; | |
1835 | port->IER |= IER_TXRDY; | |
25470256 | 1836 | spin_lock(&bp->lock); |
1da177e4 LT |
1837 | sx_out(bp, CD186x_CAR, port_No(port)); |
1838 | sx_out(bp, CD186x_COR2, port->COR2); | |
1839 | sx_out(bp, CD186x_IER, port->IER); | |
25470256 | 1840 | spin_unlock(&bp->lock); |
a72492bd | 1841 | spin_unlock_irqrestore(&port->lock, flags); |
1da177e4 LT |
1842 | sx_wait_CCR(bp); |
1843 | spin_lock_irqsave(&bp->lock, flags); | |
1844 | sx_out(bp, CD186x_CCR, CCR_CORCHG2); | |
1845 | spin_unlock_irqrestore(&bp->lock, flags); | |
1846 | sx_wait_CCR(bp); | |
1847 | ||
1848 | func_exit(); | |
faa7612c | 1849 | return 0; |
1da177e4 LT |
1850 | } |
1851 | ||
1852 | ||
d2fbd0f2 | 1853 | static int sx_set_serial_info(struct specialix_port *port, |
a72492bd | 1854 | struct serial_struct __user *newinfo) |
1da177e4 LT |
1855 | { |
1856 | struct serial_struct tmp; | |
1857 | struct specialix_board *bp = port_Board(port); | |
1858 | int change_speed; | |
1859 | ||
1860 | func_enter(); | |
b190e178 | 1861 | |
1da177e4 LT |
1862 | if (copy_from_user(&tmp, newinfo, sizeof(tmp))) { |
1863 | func_enter(); | |
1864 | return -EFAULT; | |
1865 | } | |
d61780c0 | 1866 | |
b190e178 | 1867 | lock_kernel(); |
1da177e4 | 1868 | |
44b7d1b3 | 1869 | change_speed = ((port->port.flags & ASYNC_SPD_MASK) != |
1da177e4 LT |
1870 | (tmp.flags & ASYNC_SPD_MASK)); |
1871 | change_speed |= (tmp.custom_divisor != port->custom_divisor); | |
d61780c0 | 1872 | |
1da177e4 | 1873 | if (!capable(CAP_SYS_ADMIN)) { |
44b7d1b3 AC |
1874 | if ((tmp.close_delay != port->port.close_delay) || |
1875 | (tmp.closing_wait != port->port.closing_wait) || | |
1da177e4 | 1876 | ((tmp.flags & ~ASYNC_USR_MASK) != |
44b7d1b3 | 1877 | (port->port.flags & ~ASYNC_USR_MASK))) { |
1da177e4 | 1878 | func_exit(); |
b190e178 | 1879 | unlock_kernel(); |
1da177e4 LT |
1880 | return -EPERM; |
1881 | } | |
44b7d1b3 | 1882 | port->port.flags = ((port->port.flags & ~ASYNC_USR_MASK) | |
a72492bd | 1883 | (tmp.flags & ASYNC_USR_MASK)); |
1da177e4 LT |
1884 | port->custom_divisor = tmp.custom_divisor; |
1885 | } else { | |
44b7d1b3 | 1886 | port->port.flags = ((port->port.flags & ~ASYNC_FLAGS) | |
a72492bd | 1887 | (tmp.flags & ASYNC_FLAGS)); |
44b7d1b3 AC |
1888 | port->port.close_delay = tmp.close_delay; |
1889 | port->port.closing_wait = tmp.closing_wait; | |
1da177e4 LT |
1890 | port->custom_divisor = tmp.custom_divisor; |
1891 | } | |
a72492bd | 1892 | if (change_speed) |
1da177e4 | 1893 | sx_change_speed(bp, port); |
a72492bd | 1894 | |
1da177e4 | 1895 | func_exit(); |
b190e178 | 1896 | unlock_kernel(); |
1da177e4 LT |
1897 | return 0; |
1898 | } | |
1899 | ||
1900 | ||
d2fbd0f2 | 1901 | static int sx_get_serial_info(struct specialix_port *port, |
1da177e4 LT |
1902 | struct serial_struct __user *retinfo) |
1903 | { | |
1904 | struct serial_struct tmp; | |
1905 | struct specialix_board *bp = port_Board(port); | |
d61780c0 | 1906 | |
1da177e4 LT |
1907 | func_enter(); |
1908 | ||
1da177e4 | 1909 | memset(&tmp, 0, sizeof(tmp)); |
b190e178 | 1910 | lock_kernel(); |
1da177e4 LT |
1911 | tmp.type = PORT_CIRRUS; |
1912 | tmp.line = port - sx_port; | |
1913 | tmp.port = bp->base; | |
1914 | tmp.irq = bp->irq; | |
44b7d1b3 | 1915 | tmp.flags = port->port.flags; |
1da177e4 | 1916 | tmp.baud_base = (SX_OSCFREQ + CD186x_TPC/2) / CD186x_TPC; |
44b7d1b3 AC |
1917 | tmp.close_delay = port->port.close_delay * HZ/100; |
1918 | tmp.closing_wait = port->port.closing_wait * HZ/100; | |
1da177e4 LT |
1919 | tmp.custom_divisor = port->custom_divisor; |
1920 | tmp.xmit_fifo_size = CD186x_NFIFO; | |
b190e178 | 1921 | unlock_kernel(); |
1da177e4 LT |
1922 | if (copy_to_user(retinfo, &tmp, sizeof(tmp))) { |
1923 | func_exit(); | |
1924 | return -EFAULT; | |
1925 | } | |
1926 | ||
1927 | func_exit(); | |
1928 | return 0; | |
1929 | } | |
1930 | ||
1931 | ||
a72492bd AC |
1932 | static int sx_ioctl(struct tty_struct *tty, struct file *filp, |
1933 | unsigned int cmd, unsigned long arg) | |
1da177e4 | 1934 | { |
c9f19e96 | 1935 | struct specialix_port *port = tty->driver_data; |
1da177e4 LT |
1936 | void __user *argp = (void __user *)arg; |
1937 | ||
1938 | func_enter(); | |
1939 | ||
1940 | if (sx_paranoia_check(port, tty->name, "sx_ioctl")) { | |
1941 | func_exit(); | |
1942 | return -ENODEV; | |
1943 | } | |
d61780c0 | 1944 | |
1da177e4 | 1945 | switch (cmd) { |
a72492bd | 1946 | case TIOCGSERIAL: |
faa7612c | 1947 | func_exit(); |
1da177e4 | 1948 | return sx_get_serial_info(port, argp); |
a72492bd | 1949 | case TIOCSSERIAL: |
faa7612c | 1950 | func_exit(); |
1da177e4 | 1951 | return sx_set_serial_info(port, argp); |
a72492bd | 1952 | default: |
faa7612c | 1953 | func_exit(); |
1da177e4 LT |
1954 | return -ENOIOCTLCMD; |
1955 | } | |
1956 | func_exit(); | |
1957 | return 0; | |
1958 | } | |
1959 | ||
1960 | ||
a72492bd | 1961 | static void sx_throttle(struct tty_struct *tty) |
1da177e4 | 1962 | { |
c9f19e96 | 1963 | struct specialix_port *port = tty->driver_data; |
1da177e4 LT |
1964 | struct specialix_board *bp; |
1965 | unsigned long flags; | |
1966 | ||
1967 | func_enter(); | |
1968 | ||
1969 | if (sx_paranoia_check(port, tty->name, "sx_throttle")) { | |
1970 | func_exit(); | |
1971 | return; | |
1972 | } | |
d61780c0 | 1973 | |
1da177e4 | 1974 | bp = port_Board(port); |
d61780c0 | 1975 | |
1da177e4 | 1976 | /* Use DTR instead of RTS ! */ |
d2fbd0f2 | 1977 | if (sx_crtscts(tty)) |
1da177e4 LT |
1978 | port->MSVR &= ~MSVR_DTR; |
1979 | else { | |
1980 | /* Auch!!! I think the system shouldn't call this then. */ | |
1981 | /* Or maybe we're supposed (allowed?) to do our side of hw | |
d61780c0 | 1982 | handshake anyway, even when hardware handshake is off. |
1da177e4 | 1983 | When you see this in your logs, please report.... */ |
a72492bd AC |
1984 | printk(KERN_ERR |
1985 | "sx%d: Need to throttle, but can't (hardware hs is off)\n", | |
1986 | port_No(port)); | |
1da177e4 LT |
1987 | } |
1988 | spin_lock_irqsave(&bp->lock, flags); | |
1989 | sx_out(bp, CD186x_CAR, port_No(port)); | |
1990 | spin_unlock_irqrestore(&bp->lock, flags); | |
1991 | if (I_IXOFF(tty)) { | |
1da177e4 LT |
1992 | sx_wait_CCR(bp); |
1993 | spin_lock_irqsave(&bp->lock, flags); | |
1994 | sx_out(bp, CD186x_CCR, CCR_SSCH2); | |
1995 | spin_unlock_irqrestore(&bp->lock, flags); | |
1996 | sx_wait_CCR(bp); | |
1997 | } | |
1998 | spin_lock_irqsave(&bp->lock, flags); | |
1999 | sx_out(bp, CD186x_MSVR, port->MSVR); | |
2000 | spin_unlock_irqrestore(&bp->lock, flags); | |
2001 | ||
2002 | func_exit(); | |
2003 | } | |
2004 | ||
2005 | ||
a72492bd | 2006 | static void sx_unthrottle(struct tty_struct *tty) |
1da177e4 | 2007 | { |
c9f19e96 | 2008 | struct specialix_port *port = tty->driver_data; |
1da177e4 LT |
2009 | struct specialix_board *bp; |
2010 | unsigned long flags; | |
2011 | ||
2012 | func_enter(); | |
d61780c0 | 2013 | |
1da177e4 LT |
2014 | if (sx_paranoia_check(port, tty->name, "sx_unthrottle")) { |
2015 | func_exit(); | |
2016 | return; | |
2017 | } | |
d61780c0 | 2018 | |
1da177e4 | 2019 | bp = port_Board(port); |
d61780c0 | 2020 | |
1da177e4 LT |
2021 | spin_lock_irqsave(&port->lock, flags); |
2022 | /* XXXX Use DTR INSTEAD???? */ | |
d2fbd0f2 | 2023 | if (sx_crtscts(tty)) |
1da177e4 | 2024 | port->MSVR |= MSVR_DTR; |
a72492bd | 2025 | /* Else clause: see remark in "sx_throttle"... */ |
25470256 | 2026 | spin_lock(&bp->lock); |
1da177e4 | 2027 | sx_out(bp, CD186x_CAR, port_No(port)); |
25470256 | 2028 | spin_unlock(&bp->lock); |
1da177e4 LT |
2029 | if (I_IXOFF(tty)) { |
2030 | spin_unlock_irqrestore(&port->lock, flags); | |
2031 | sx_wait_CCR(bp); | |
2032 | spin_lock_irqsave(&bp->lock, flags); | |
2033 | sx_out(bp, CD186x_CCR, CCR_SSCH1); | |
2034 | spin_unlock_irqrestore(&bp->lock, flags); | |
2035 | sx_wait_CCR(bp); | |
2036 | spin_lock_irqsave(&port->lock, flags); | |
2037 | } | |
25470256 | 2038 | spin_lock(&bp->lock); |
1da177e4 | 2039 | sx_out(bp, CD186x_MSVR, port->MSVR); |
25470256 | 2040 | spin_unlock(&bp->lock); |
1da177e4 LT |
2041 | spin_unlock_irqrestore(&port->lock, flags); |
2042 | ||
2043 | func_exit(); | |
2044 | } | |
2045 | ||
2046 | ||
a72492bd | 2047 | static void sx_stop(struct tty_struct *tty) |
1da177e4 | 2048 | { |
c9f19e96 | 2049 | struct specialix_port *port = tty->driver_data; |
1da177e4 LT |
2050 | struct specialix_board *bp; |
2051 | unsigned long flags; | |
2052 | ||
2053 | func_enter(); | |
d61780c0 | 2054 | |
1da177e4 LT |
2055 | if (sx_paranoia_check(port, tty->name, "sx_stop")) { |
2056 | func_exit(); | |
2057 | return; | |
2058 | } | |
2059 | ||
2060 | bp = port_Board(port); | |
d61780c0 | 2061 | |
1da177e4 LT |
2062 | spin_lock_irqsave(&port->lock, flags); |
2063 | port->IER &= ~IER_TXRDY; | |
25470256 | 2064 | spin_lock(&bp->lock); |
1da177e4 LT |
2065 | sx_out(bp, CD186x_CAR, port_No(port)); |
2066 | sx_out(bp, CD186x_IER, port->IER); | |
25470256 | 2067 | spin_unlock(&bp->lock); |
1da177e4 LT |
2068 | spin_unlock_irqrestore(&port->lock, flags); |
2069 | ||
2070 | func_exit(); | |
2071 | } | |
2072 | ||
2073 | ||
a72492bd | 2074 | static void sx_start(struct tty_struct *tty) |
1da177e4 | 2075 | { |
c9f19e96 | 2076 | struct specialix_port *port = tty->driver_data; |
1da177e4 LT |
2077 | struct specialix_board *bp; |
2078 | unsigned long flags; | |
2079 | ||
2080 | func_enter(); | |
d61780c0 | 2081 | |
1da177e4 LT |
2082 | if (sx_paranoia_check(port, tty->name, "sx_start")) { |
2083 | func_exit(); | |
2084 | return; | |
2085 | } | |
d61780c0 | 2086 | |
1da177e4 | 2087 | bp = port_Board(port); |
d61780c0 | 2088 | |
1da177e4 LT |
2089 | spin_lock_irqsave(&port->lock, flags); |
2090 | if (port->xmit_cnt && port->xmit_buf && !(port->IER & IER_TXRDY)) { | |
2091 | port->IER |= IER_TXRDY; | |
25470256 | 2092 | spin_lock(&bp->lock); |
1da177e4 LT |
2093 | sx_out(bp, CD186x_CAR, port_No(port)); |
2094 | sx_out(bp, CD186x_IER, port->IER); | |
25470256 | 2095 | spin_unlock(&bp->lock); |
1da177e4 LT |
2096 | } |
2097 | spin_unlock_irqrestore(&port->lock, flags); | |
2098 | ||
2099 | func_exit(); | |
2100 | } | |
2101 | ||
a72492bd | 2102 | static void sx_hangup(struct tty_struct *tty) |
1da177e4 | 2103 | { |
c9f19e96 | 2104 | struct specialix_port *port = tty->driver_data; |
1da177e4 LT |
2105 | struct specialix_board *bp; |
2106 | unsigned long flags; | |
2107 | ||
2108 | func_enter(); | |
2109 | ||
2110 | if (sx_paranoia_check(port, tty->name, "sx_hangup")) { | |
2111 | func_exit(); | |
2112 | return; | |
2113 | } | |
d61780c0 | 2114 | |
1da177e4 | 2115 | bp = port_Board(port); |
d61780c0 | 2116 | |
1da177e4 LT |
2117 | sx_shutdown_port(bp, port); |
2118 | spin_lock_irqsave(&port->lock, flags); | |
44b7d1b3 | 2119 | bp->count -= port->port.count; |
1da177e4 | 2120 | if (bp->count < 0) { |
a72492bd AC |
2121 | printk(KERN_ERR |
2122 | "sx%d: sx_hangup: bad board count: %d port: %d\n", | |
2123 | board_No(bp), bp->count, tty->index); | |
1da177e4 LT |
2124 | bp->count = 0; |
2125 | } | |
44b7d1b3 AC |
2126 | port->port.count = 0; |
2127 | port->port.flags &= ~ASYNC_NORMAL_ACTIVE; | |
2128 | port->port.tty = NULL; | |
1da177e4 | 2129 | spin_unlock_irqrestore(&port->lock, flags); |
44b7d1b3 | 2130 | wake_up_interruptible(&port->port.open_wait); |
1da177e4 LT |
2131 | |
2132 | func_exit(); | |
2133 | } | |
2134 | ||
2135 | ||
a72492bd AC |
2136 | static void sx_set_termios(struct tty_struct *tty, |
2137 | struct ktermios *old_termios) | |
1da177e4 | 2138 | { |
c9f19e96 | 2139 | struct specialix_port *port = tty->driver_data; |
1da177e4 | 2140 | unsigned long flags; |
a72492bd | 2141 | struct specialix_board *bp; |
d61780c0 | 2142 | |
1da177e4 LT |
2143 | if (sx_paranoia_check(port, tty->name, "sx_set_termios")) |
2144 | return; | |
d61780c0 | 2145 | |
1da177e4 LT |
2146 | bp = port_Board(port); |
2147 | spin_lock_irqsave(&port->lock, flags); | |
2148 | sx_change_speed(port_Board(port), port); | |
2149 | spin_unlock_irqrestore(&port->lock, flags); | |
2150 | ||
2151 | if ((old_termios->c_cflag & CRTSCTS) && | |
2152 | !(tty->termios->c_cflag & CRTSCTS)) { | |
2153 | tty->hw_stopped = 0; | |
2154 | sx_start(tty); | |
2155 | } | |
2156 | } | |
2157 | ||
b68e31d0 | 2158 | static const struct tty_operations sx_ops = { |
1da177e4 LT |
2159 | .open = sx_open, |
2160 | .close = sx_close, | |
2161 | .write = sx_write, | |
2162 | .put_char = sx_put_char, | |
2163 | .flush_chars = sx_flush_chars, | |
2164 | .write_room = sx_write_room, | |
2165 | .chars_in_buffer = sx_chars_in_buffer, | |
2166 | .flush_buffer = sx_flush_buffer, | |
2167 | .ioctl = sx_ioctl, | |
2168 | .throttle = sx_throttle, | |
2169 | .unthrottle = sx_unthrottle, | |
2170 | .set_termios = sx_set_termios, | |
2171 | .stop = sx_stop, | |
2172 | .start = sx_start, | |
2173 | .hangup = sx_hangup, | |
2174 | .tiocmget = sx_tiocmget, | |
2175 | .tiocmset = sx_tiocmset, | |
faa7612c | 2176 | .break_ctl = sx_send_break, |
1da177e4 LT |
2177 | }; |
2178 | ||
2179 | static int sx_init_drivers(void) | |
2180 | { | |
2181 | int error; | |
2182 | int i; | |
2183 | ||
2184 | func_enter(); | |
2185 | ||
2186 | specialix_driver = alloc_tty_driver(SX_NBOARD * SX_NPORT); | |
2187 | if (!specialix_driver) { | |
2188 | printk(KERN_ERR "sx: Couldn't allocate tty_driver.\n"); | |
2189 | func_exit(); | |
2190 | return 1; | |
2191 | } | |
d61780c0 | 2192 | |
1da177e4 LT |
2193 | specialix_driver->owner = THIS_MODULE; |
2194 | specialix_driver->name = "ttyW"; | |
2195 | specialix_driver->major = SPECIALIX_NORMAL_MAJOR; | |
2196 | specialix_driver->type = TTY_DRIVER_TYPE_SERIAL; | |
2197 | specialix_driver->subtype = SERIAL_TYPE_NORMAL; | |
2198 | specialix_driver->init_termios = tty_std_termios; | |
2199 | specialix_driver->init_termios.c_cflag = | |
2200 | B9600 | CS8 | CREAD | HUPCL | CLOCAL; | |
606d099c AC |
2201 | specialix_driver->init_termios.c_ispeed = 9600; |
2202 | specialix_driver->init_termios.c_ospeed = 9600; | |
faa7612c AC |
2203 | specialix_driver->flags = TTY_DRIVER_REAL_RAW | |
2204 | TTY_DRIVER_HARDWARE_BREAK; | |
1da177e4 LT |
2205 | tty_set_operations(specialix_driver, &sx_ops); |
2206 | ||
a72492bd AC |
2207 | error = tty_register_driver(specialix_driver); |
2208 | if (error) { | |
1da177e4 | 2209 | put_tty_driver(specialix_driver); |
a72492bd AC |
2210 | printk(KERN_ERR |
2211 | "sx: Couldn't register specialix IO8+ driver, error = %d\n", | |
2212 | error); | |
1da177e4 LT |
2213 | func_exit(); |
2214 | return 1; | |
2215 | } | |
2216 | memset(sx_port, 0, sizeof(sx_port)); | |
2217 | for (i = 0; i < SX_NPORT * SX_NBOARD; i++) { | |
2218 | sx_port[i].magic = SPECIALIX_MAGIC; | |
44b7d1b3 | 2219 | tty_port_init(&sx_port[i].port); |
1da177e4 LT |
2220 | spin_lock_init(&sx_port[i].lock); |
2221 | } | |
d61780c0 | 2222 | |
1da177e4 LT |
2223 | func_exit(); |
2224 | return 0; | |
2225 | } | |
2226 | ||
2227 | static void sx_release_drivers(void) | |
2228 | { | |
2229 | func_enter(); | |
2230 | ||
1da177e4 LT |
2231 | tty_unregister_driver(specialix_driver); |
2232 | put_tty_driver(specialix_driver); | |
2233 | func_exit(); | |
2234 | } | |
2235 | ||
d61780c0 JG |
2236 | /* |
2237 | * This routine must be called by kernel at boot time | |
1da177e4 LT |
2238 | */ |
2239 | static int __init specialix_init(void) | |
2240 | { | |
2241 | int i; | |
2242 | int found = 0; | |
2243 | ||
2244 | func_enter(); | |
2245 | ||
2246 | printk(KERN_INFO "sx: Specialix IO8+ driver v" VERSION ", (c) R.E.Wolff 1997/1998.\n"); | |
2247 | printk(KERN_INFO "sx: derived from work (c) D.Gorodchanin 1994-1996.\n"); | |
d2fbd0f2 AC |
2248 | if (sx_rtscts) |
2249 | printk(KERN_INFO | |
2250 | "sx: DTR/RTS pin is RTS when CRTSCTS is on.\n"); | |
2251 | else | |
2252 | printk(KERN_INFO "sx: DTR/RTS pin is always RTS.\n"); | |
d61780c0 | 2253 | |
1da177e4 | 2254 | for (i = 0; i < SX_NBOARD; i++) |
34af946a | 2255 | spin_lock_init(&sx_board[i].lock); |
1da177e4 LT |
2256 | |
2257 | if (sx_init_drivers()) { | |
2258 | func_exit(); | |
2259 | return -EIO; | |
2260 | } | |
2261 | ||
d61780c0 | 2262 | for (i = 0; i < SX_NBOARD; i++) |
1da177e4 LT |
2263 | if (sx_board[i].base && !sx_probe(&sx_board[i])) |
2264 | found++; | |
2265 | ||
2266 | #ifdef CONFIG_PCI | |
2267 | { | |
2268 | struct pci_dev *pdev = NULL; | |
2269 | ||
a72492bd | 2270 | i = 0; |
1da177e4 LT |
2271 | while (i < SX_NBOARD) { |
2272 | if (sx_board[i].flags & SX_BOARD_PRESENT) { | |
2273 | i++; | |
2274 | continue; | |
2275 | } | |
a72492bd AC |
2276 | pdev = pci_get_device(PCI_VENDOR_ID_SPECIALIX, |
2277 | PCI_DEVICE_ID_SPECIALIX_IO8, pdev); | |
2278 | if (!pdev) | |
2279 | break; | |
1da177e4 LT |
2280 | |
2281 | if (pci_enable_device(pdev)) | |
2282 | continue; | |
2283 | ||
2284 | sx_board[i].irq = pdev->irq; | |
2285 | ||
a72492bd | 2286 | sx_board[i].base = pci_resource_start(pdev, 2); |
1da177e4 LT |
2287 | |
2288 | sx_board[i].flags |= SX_BOARD_IS_PCI; | |
2289 | if (!sx_probe(&sx_board[i])) | |
a72492bd | 2290 | found++; |
1da177e4 | 2291 | } |
606d099c AC |
2292 | /* May exit pci_get sequence early with lots of boards */ |
2293 | if (pdev != NULL) | |
2294 | pci_dev_put(pdev); | |
1da177e4 LT |
2295 | } |
2296 | #endif | |
2297 | ||
2298 | if (!found) { | |
2299 | sx_release_drivers(); | |
2300 | printk(KERN_INFO "sx: No specialix IO8+ boards detected.\n"); | |
2301 | func_exit(); | |
2302 | return -EIO; | |
2303 | } | |
2304 | ||
2305 | func_exit(); | |
2306 | return 0; | |
2307 | } | |
2308 | ||
2309 | static int iobase[SX_NBOARD] = {0,}; | |
d2fbd0f2 | 2310 | static int irq[SX_NBOARD] = {0,}; |
1da177e4 LT |
2311 | |
2312 | module_param_array(iobase, int, NULL, 0); | |
2313 | module_param_array(irq, int, NULL, 0); | |
2314 | module_param(sx_debug, int, 0); | |
d2fbd0f2 | 2315 | module_param(sx_rtscts, int, 0); |
1da177e4 | 2316 | module_param(sx_rxfifo, int, 0); |
1da177e4 LT |
2317 | |
2318 | /* | |
2319 | * You can setup up to 4 boards. | |
2320 | * by specifying "iobase=0xXXX,0xXXX ..." as insmod parameter. | |
d61780c0 JG |
2321 | * You should specify the IRQs too in that case "irq=....,...". |
2322 | * | |
1da177e4 | 2323 | * More than 4 boards in one computer is not possible, as the card can |
d61780c0 | 2324 | * only use 4 different interrupts. |
1da177e4 LT |
2325 | * |
2326 | */ | |
2327 | static int __init specialix_init_module(void) | |
2328 | { | |
2329 | int i; | |
2330 | ||
2331 | func_enter(); | |
2332 | ||
1da177e4 | 2333 | if (iobase[0] || iobase[1] || iobase[2] || iobase[3]) { |
a72492bd | 2334 | for (i = 0; i < SX_NBOARD; i++) { |
1da177e4 LT |
2335 | sx_board[i].base = iobase[i]; |
2336 | sx_board[i].irq = irq[i]; | |
a72492bd | 2337 | sx_board[i].count = 0; |
1da177e4 LT |
2338 | } |
2339 | } | |
2340 | ||
2341 | func_exit(); | |
2342 | ||
2343 | return specialix_init(); | |
2344 | } | |
d61780c0 | 2345 | |
1da177e4 LT |
2346 | static void __exit specialix_exit_module(void) |
2347 | { | |
2348 | int i; | |
d61780c0 | 2349 | |
1da177e4 LT |
2350 | func_enter(); |
2351 | ||
2352 | sx_release_drivers(); | |
2353 | for (i = 0; i < SX_NBOARD; i++) | |
d61780c0 | 2354 | if (sx_board[i].flags & SX_BOARD_PRESENT) |
1da177e4 | 2355 | sx_release_io_range(&sx_board[i]); |
1da177e4 LT |
2356 | func_exit(); |
2357 | } | |
2358 | ||
7691030b CS |
2359 | static struct pci_device_id specialx_pci_tbl[] __devinitdata = { |
2360 | { PCI_DEVICE(PCI_VENDOR_ID_SPECIALIX, PCI_DEVICE_ID_SPECIALIX_IO8) }, | |
2361 | { } | |
2362 | }; | |
2363 | MODULE_DEVICE_TABLE(pci, specialx_pci_tbl); | |
2364 | ||
1da177e4 LT |
2365 | module_init(specialix_init_module); |
2366 | module_exit(specialix_exit_module); | |
2367 | ||
2368 | MODULE_LICENSE("GPL"); | |
5350d3ba | 2369 | MODULE_ALIAS_CHARDEV_MAJOR(SPECIALIX_NORMAL_MAJOR); |