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[PATCH] fix semaphore handling in __unregister_chrdev_region
[linux/fpc-iii.git] / sound / oss / nec_vrc5477.c
blob0481e5e54ddf27eb91ffee7d9245ed9bb035631e
1 /***********************************************************************
2 * Copyright 2001 MontaVista Software Inc.
3 * Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
4 *
5 * drivers/sound/nec_vrc5477.c
6 * AC97 sound dirver for NEC Vrc5477 chip (an integrated,
7 * multi-function controller chip for MIPS CPUs)
8 *
9 * VRA support Copyright 2001 Bradley D. LaRonde <brad@ltc.com>
10 *
11 * This program is free software; you can redistribute it and/or modify it
12 * under the terms of the GNU General Public License as published by the
13 * Free Software Foundation; either version 2 of the License, or (at your
14 * option) any later version.
15 ***********************************************************************
16 */
17
18 /*
19 * This code is derived from ite8172.c, which is written by Steve Longerbeam.
20 *
21 * Features:
22 * Currently we only support the following capabilities:
23 * . mono output to PCM L/R (line out).
24 * . stereo output to PCM L/R (line out).
25 * . mono input from PCM L (line in).
26 * . stereo output from PCM (line in).
27 * . sampling rate at 48k or variable sampling rate
28 * . support /dev/dsp, /dev/mixer devices, standard OSS devices.
29 * . only support 16-bit PCM format (hardware limit, no software
30 * translation)
31 * . support duplex, but no trigger or realtime.
32 *
33 * Specifically the following are not supported:
34 * . app-set frag size.
35 * . mmap'ed buffer access
36 */
37
38 /*
39 * Original comments from ite8172.c file.
40 */
41
42 /*
43 *
44 * Notes:
45 *
46 * 1. Much of the OSS buffer allocation, ioctl's, and mmap'ing are
47 * taken, slightly modified or not at all, from the ES1371 driver,
48 * so refer to the credits in es1371.c for those. The rest of the
49 * code (probe, open, read, write, the ISR, etc.) is new.
50 * 2. The following support is untested:
51 * * Memory mapping the audio buffers, and the ioctl controls that go
52 * with it.
53 * * S/PDIF output.
54 * 3. The following is not supported:
55 * * I2S input.
56 * * legacy audio mode.
57 * 4. Support for volume button interrupts is implemented but doesn't
58 * work yet.
59 *
60 * Revision history
61 * 02.08.2001 0.1 Initial release
62 */
63
64 #include <linux/module.h>
65 #include <linux/string.h>
66 #include <linux/kernel.h>
67 #include <linux/ioport.h>
68 #include <linux/sched.h>
69 #include <linux/delay.h>
70 #include <linux/sound.h>
71 #include <linux/slab.h>
72 #include <linux/soundcard.h>
73 #include <linux/pci.h>
74 #include <linux/init.h>
75 #include <linux/poll.h>
76 #include <linux/bitops.h>
77 #include <linux/proc_fs.h>
78 #include <linux/spinlock.h>
79 #include <linux/smp_lock.h>
80 #include <linux/ac97_codec.h>
81 #include <asm/io.h>
82 #include <asm/dma.h>
83 #include <asm/uaccess.h>
84
85 /* -------------------debug macros -------------------------------------- */
86 /* #undef VRC5477_AC97_DEBUG */
87 #define VRC5477_AC97_DEBUG
88
89 #undef VRC5477_AC97_VERBOSE_DEBUG
90 /* #define VRC5477_AC97_VERBOSE_DEBUG */
91
92 #if defined(VRC5477_AC97_VERBOSE_DEBUG)
93 #define VRC5477_AC97_DEBUG
94 #endif
95
96 #if defined(VRC5477_AC97_DEBUG)
97 #define ASSERT(x) if (!(x)) { \
98 panic("assertion failed at %s:%d: %s\n", __FILE__, __LINE__, #x); }
99 #else
100 #define ASSERT(x)
101 #endif /* VRC5477_AC97_DEBUG */
102
103 #if defined(VRC5477_AC97_VERBOSE_DEBUG)
104 static u16 inTicket; /* check sync between intr & write */
105 static u16 outTicket;
106 #endif
107
108 /* --------------------------------------------------------------------- */
109
110 #undef OSS_DOCUMENTED_MIXER_SEMANTICS
111
112 static const unsigned sample_shift[] = { 0, 1, 1, 2 };
113
114 #define VRC5477_INT_CLR 0x0
115 #define VRC5477_INT_STATUS 0x0
116 #define VRC5477_CODEC_WR 0x4
117 #define VRC5477_CODEC_RD 0x8
118 #define VRC5477_CTRL 0x18
119 #define VRC5477_ACLINK_CTRL 0x1c
120 #define VRC5477_INT_MASK 0x24
121
122 #define VRC5477_DAC1_CTRL 0x30
123 #define VRC5477_DAC1L 0x34
124 #define VRC5477_DAC1_BADDR 0x38
125 #define VRC5477_DAC2_CTRL 0x3c
126 #define VRC5477_DAC2L 0x40
127 #define VRC5477_DAC2_BADDR 0x44
128 #define VRC5477_DAC3_CTRL 0x48
129 #define VRC5477_DAC3L 0x4c
130 #define VRC5477_DAC3_BADDR 0x50
131
132 #define VRC5477_ADC1_CTRL 0x54
133 #define VRC5477_ADC1L 0x58
134 #define VRC5477_ADC1_BADDR 0x5c
135 #define VRC5477_ADC2_CTRL 0x60
136 #define VRC5477_ADC2L 0x64
137 #define VRC5477_ADC2_BADDR 0x68
138 #define VRC5477_ADC3_CTRL 0x6c
139 #define VRC5477_ADC3L 0x70
140 #define VRC5477_ADC3_BADDR 0x74
141
142 #define VRC5477_CODEC_WR_RWC (1 << 23)
143
144 #define VRC5477_CODEC_RD_RRDYA (1 << 31)
145 #define VRC5477_CODEC_RD_RRDYD (1 << 30)
146
147 #define VRC5477_ACLINK_CTRL_RST_ON (1 << 15)
148 #define VRC5477_ACLINK_CTRL_RST_TIME 0x7f
149 #define VRC5477_ACLINK_CTRL_SYNC_ON (1 << 30)
150 #define VRC5477_ACLINK_CTRL_CK_STOP_ON (1 << 31)
151
152 #define VRC5477_CTRL_DAC2ENB (1 << 15)
153 #define VRC5477_CTRL_ADC2ENB (1 << 14)
154 #define VRC5477_CTRL_DAC1ENB (1 << 13)
155 #define VRC5477_CTRL_ADC1ENB (1 << 12)
156
157 #define VRC5477_INT_MASK_NMASK (1 << 31)
158 #define VRC5477_INT_MASK_DAC1END (1 << 5)
159 #define VRC5477_INT_MASK_DAC2END (1 << 4)
160 #define VRC5477_INT_MASK_DAC3END (1 << 3)
161 #define VRC5477_INT_MASK_ADC1END (1 << 2)
162 #define VRC5477_INT_MASK_ADC2END (1 << 1)
163 #define VRC5477_INT_MASK_ADC3END (1 << 0)
164
165 #define VRC5477_DMA_ACTIVATION (1 << 31)
166 #define VRC5477_DMA_WIP (1 << 30)
167
168
169 #define VRC5477_AC97_MODULE_NAME "NEC_Vrc5477_audio"
170 #define PFX VRC5477_AC97_MODULE_NAME ": "
171
172 /* --------------------------------------------------------------------- */
173
174 struct vrc5477_ac97_state {
175 /* list of vrc5477_ac97 devices */
176 struct list_head devs;
177
178 /* the corresponding pci_dev structure */
179 struct pci_dev *dev;
180
181 /* soundcore stuff */
182 int dev_audio;
183
184 /* hardware resources */
185 unsigned long io;
186 unsigned int irq;
187
188 #ifdef VRC5477_AC97_DEBUG
189 /* debug /proc entry */
190 struct proc_dir_entry *ps;
191 struct proc_dir_entry *ac97_ps;
192 #endif /* VRC5477_AC97_DEBUG */
193
194 struct ac97_codec *codec;
195
196 unsigned dacChannels, adcChannels;
197 unsigned short dacRate, adcRate;
198 unsigned short extended_status;
199
200 spinlock_t lock;
201 struct semaphore open_sem;
202 mode_t open_mode;
203 wait_queue_head_t open_wait;
204
205 struct dmabuf {
206 void *lbuf, *rbuf;
207 dma_addr_t lbufDma, rbufDma;
208 unsigned bufOrder;
209 unsigned numFrag;
210 unsigned fragShift;
211 unsigned fragSize; /* redundant */
212 unsigned fragTotalSize; /* = numFrag * fragSize(real) */
213 unsigned nextIn;
214 unsigned nextOut;
215 int count;
216 unsigned error; /* over/underrun */
217 wait_queue_head_t wait;
218 /* OSS stuff */
219 unsigned stopped:1;
220 unsigned ready:1;
221 } dma_dac, dma_adc;
222
223 #define WORK_BUF_SIZE 2048
224 struct {
225 u16 lchannel;
226 u16 rchannel;
227 } workBuf[WORK_BUF_SIZE/4];
228 };
229
230 /* --------------------------------------------------------------------- */
231
232 static LIST_HEAD(devs);
233
234 /* --------------------------------------------------------------------- */
235
236 static inline unsigned ld2(unsigned int x)
237 {
238 unsigned r = 0;
239
240 if (x >= 0x10000) {
241 x >>= 16;
242 r += 16;
243 }
244 if (x >= 0x100) {
245 x >>= 8;
246 r += 8;
247 }
248 if (x >= 0x10) {
249 x >>= 4;
250 r += 4;
251 }
252 if (x >= 4) {
253 x >>= 2;
254 r += 2;
255 }
256 if (x >= 2)
257 r++;
258 return r;
259 }
260
261 /* --------------------------------------------------------------------- */
262
263 static u16 rdcodec(struct ac97_codec *codec, u8 addr)
264 {
265 struct vrc5477_ac97_state *s =
266 (struct vrc5477_ac97_state *)codec->private_data;
267 unsigned long flags;
268 u32 result;
269
270 spin_lock_irqsave(&s->lock, flags);
271
272 /* wait until we can access codec registers */
273 while (inl(s->io + VRC5477_CODEC_WR) & 0x80000000);
274
275 /* write the address and "read" command to codec */
276 addr = addr & 0x7f;
277 outl((addr << 16) | VRC5477_CODEC_WR_RWC, s->io + VRC5477_CODEC_WR);
278
279 /* get the return result */
280 udelay(100); /* workaround hardware bug */
281 while ( (result = inl(s->io + VRC5477_CODEC_RD)) &
282 (VRC5477_CODEC_RD_RRDYA | VRC5477_CODEC_RD_RRDYD) ) {
283 /* we get either addr or data, or both */
284 if (result & VRC5477_CODEC_RD_RRDYA) {
285 ASSERT(addr == ((result >> 16) & 0x7f) );
286 }
287 if (result & VRC5477_CODEC_RD_RRDYD) {
288 break;
289 }
290 }
291
292 spin_unlock_irqrestore(&s->lock, flags);
293
294 return result & 0xffff;
295 }
296
297
298 static void wrcodec(struct ac97_codec *codec, u8 addr, u16 data)
299 {
300 struct vrc5477_ac97_state *s =
301 (struct vrc5477_ac97_state *)codec->private_data;
302 unsigned long flags;
303
304 spin_lock_irqsave(&s->lock, flags);
305
306 /* wait until we can access codec registers */
307 while (inl(s->io + VRC5477_CODEC_WR) & 0x80000000);
308
309 /* write the address and value to codec */
310 outl((addr << 16) | data, s->io + VRC5477_CODEC_WR);
311
312 spin_unlock_irqrestore(&s->lock, flags);
313 }
314
315
316 static void waitcodec(struct ac97_codec *codec)
317 {
318 struct vrc5477_ac97_state *s =
319 (struct vrc5477_ac97_state *)codec->private_data;
320
321 /* wait until we can access codec registers */
322 while (inl(s->io + VRC5477_CODEC_WR) & 0x80000000);
323 }
324
325 static int ac97_codec_not_present(struct ac97_codec *codec)
326 {
327 struct vrc5477_ac97_state *s =
328 (struct vrc5477_ac97_state *)codec->private_data;
329 unsigned long flags;
330 unsigned short count = 0xffff;
331
332 spin_lock_irqsave(&s->lock, flags);
333
334 /* wait until we can access codec registers */
335 do {
336 if (!(inl(s->io + VRC5477_CODEC_WR) & 0x80000000))
337 break;
338 } while (--count);
339
340 if (count == 0) {
341 spin_unlock_irqrestore(&s->lock, flags);
342 return -1;
343 }
344
345 /* write 0 to reset */
346 outl((AC97_RESET << 16) | 0, s->io + VRC5477_CODEC_WR);
347
348 /* test whether we get a response from ac97 chip */
349 count = 0xffff;
350 do {
351 if (!(inl(s->io + VRC5477_CODEC_WR) & 0x80000000))
352 break;
353 } while (--count);
354
355 if (count == 0) {
356 spin_unlock_irqrestore(&s->lock, flags);
357 return -1;
358 }
359 spin_unlock_irqrestore(&s->lock, flags);
360 return 0;
361 }
362
363 /* --------------------------------------------------------------------- */
364
365 static void vrc5477_ac97_delay(int msec)
366 {
367 unsigned long tmo;
368 signed long tmo2;
369
370 if (in_interrupt())
371 return;
372
373 tmo = jiffies + (msec*HZ)/1000;
374 for (;;) {
375 tmo2 = tmo - jiffies;
376 if (tmo2 <= 0)
377 break;
378 schedule_timeout(tmo2);
379 }
380 }
381
382
383 static void set_adc_rate(struct vrc5477_ac97_state *s, unsigned rate)
384 {
385 wrcodec(s->codec, AC97_PCM_LR_ADC_RATE, rate);
386 s->adcRate = rate;
387 }
388
389
390 static void set_dac_rate(struct vrc5477_ac97_state *s, unsigned rate)
391 {
392 if(s->extended_status & AC97_EXTSTAT_VRA) {
393 wrcodec(s->codec, AC97_PCM_FRONT_DAC_RATE, rate);
394 s->dacRate = rdcodec(s->codec, AC97_PCM_FRONT_DAC_RATE);
395 }
396 }
397
398 static int ac97_codec_not_present(struct ac97_codec *codec)
399 {
400 struct vrc5477_ac97_state *s =
401 (struct vrc5477_ac97_state *)codec->private_data;
402 unsigned long flags;
403 unsigned short count = 0xffff;
404
405 spin_lock_irqsave(&s->lock, flags);
406
407 /* wait until we can access codec registers */
408 do {
409 if (!(inl(s->io + VRC5477_CODEC_WR) & 0x80000000))
410 break;
411 } while (--count);
412
413 if (count == 0) {
414 spin_unlock_irqrestore(&s->lock, flags);
415 return -1;
416 }
417
418 /* write 0 to reset */
419 outl((AC97_RESET << 16) | 0, s->io + VRC5477_CODEC_WR);
420
421 /* test whether we get a response from ac97 chip */
422 count = 0xffff;
423 do {
424 if (!(inl(s->io + VRC5477_CODEC_WR) & 0x80000000))
425 break;
426 } while (--count);
427
428 if (count == 0) {
429 spin_unlock_irqrestore(&s->lock, flags);
430 return -1;
431 }
432 spin_unlock_irqrestore(&s->lock, flags);
433 return 0;
434 }
435
436 /* --------------------------------------------------------------------- */
437
438 extern inline void
439 stop_dac(struct vrc5477_ac97_state *s)
440 {
441 struct dmabuf* db = &s->dma_dac;
442 unsigned long flags;
443 u32 temp;
444
445 spin_lock_irqsave(&s->lock, flags);
446
447 if (db->stopped) {
448 spin_unlock_irqrestore(&s->lock, flags);
449 return;
450 }
451
452 /* deactivate the dma */
453 outl(0, s->io + VRC5477_DAC1_CTRL);
454 outl(0, s->io + VRC5477_DAC2_CTRL);
455
456 /* wait for DAM completely stop */
457 while (inl(s->io + VRC5477_DAC1_CTRL) & VRC5477_DMA_WIP);
458 while (inl(s->io + VRC5477_DAC2_CTRL) & VRC5477_DMA_WIP);
459
460 /* disable dac slots in aclink */
461 temp = inl(s->io + VRC5477_CTRL);
462 temp &= ~ (VRC5477_CTRL_DAC1ENB | VRC5477_CTRL_DAC2ENB);
463 outl (temp, s->io + VRC5477_CTRL);
464
465 /* disable interrupts */
466 temp = inl(s->io + VRC5477_INT_MASK);
467 temp &= ~ (VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END);
468 outl (temp, s->io + VRC5477_INT_MASK);
469
470 /* clear pending ones */
471 outl(VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END,
472 s->io + VRC5477_INT_CLR);
473
474 db->stopped = 1;
475
476 spin_unlock_irqrestore(&s->lock, flags);
477 }
478
479 static void start_dac(struct vrc5477_ac97_state *s)
480 {
481 struct dmabuf* db = &s->dma_dac;
482 unsigned long flags;
483 u32 dmaLength;
484 u32 temp;
485
486 spin_lock_irqsave(&s->lock, flags);
487
488 if (!db->stopped) {
489 spin_unlock_irqrestore(&s->lock, flags);
490 return;
491 }
492
493 /* we should have some data to do the DMA trasnfer */
494 ASSERT(db->count >= db->fragSize);
495
496 /* clear pending fales interrupts */
497 outl(VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END,
498 s->io + VRC5477_INT_CLR);
499
500 /* enable interrupts */
501 temp = inl(s->io + VRC5477_INT_MASK);
502 temp |= VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END;
503 outl(temp, s->io + VRC5477_INT_MASK);
504
505 /* setup dma base addr */
506 outl(db->lbufDma + db->nextOut, s->io + VRC5477_DAC1_BADDR);
507 if (s->dacChannels == 1) {
508 outl(db->lbufDma + db->nextOut, s->io + VRC5477_DAC2_BADDR);
509 } else {
510 outl(db->rbufDma + db->nextOut, s->io + VRC5477_DAC2_BADDR);
511 }
512
513 /* set dma length, in the unit of 0x10 bytes */
514 dmaLength = db->fragSize >> 4;
515 outl(dmaLength, s->io + VRC5477_DAC1L);
516 outl(dmaLength, s->io + VRC5477_DAC2L);
517
518 /* activate dma */
519 outl(VRC5477_DMA_ACTIVATION, s->io + VRC5477_DAC1_CTRL);
520 outl(VRC5477_DMA_ACTIVATION, s->io + VRC5477_DAC2_CTRL);
521
522 /* enable dac slots - we should hear the music now! */
523 temp = inl(s->io + VRC5477_CTRL);
524 temp |= (VRC5477_CTRL_DAC1ENB | VRC5477_CTRL_DAC2ENB);
525 outl (temp, s->io + VRC5477_CTRL);
526
527 /* it is time to setup next dma transfer */
528 ASSERT(inl(s->io + VRC5477_DAC1_CTRL) & VRC5477_DMA_WIP);
529 ASSERT(inl(s->io + VRC5477_DAC2_CTRL) & VRC5477_DMA_WIP);
530
531 temp = db->nextOut + db->fragSize;
532 if (temp >= db->fragTotalSize) {
533 ASSERT(temp == db->fragTotalSize);
534 temp = 0;
535 }
536
537 outl(db->lbufDma + temp, s->io + VRC5477_DAC1_BADDR);
538 if (s->dacChannels == 1) {
539 outl(db->lbufDma + temp, s->io + VRC5477_DAC2_BADDR);
540 } else {
541 outl(db->rbufDma + temp, s->io + VRC5477_DAC2_BADDR);
542 }
543
544 db->stopped = 0;
545
546 #if defined(VRC5477_AC97_VERBOSE_DEBUG)
547 outTicket = *(u16*)(db->lbuf+db->nextOut);
548 if (db->count > db->fragSize) {
549 ASSERT((u16)(outTicket+1) == *(u16*)(db->lbuf+temp));
550 }
551 #endif
552
553 spin_unlock_irqrestore(&s->lock, flags);
554 }
555
556 extern inline void stop_adc(struct vrc5477_ac97_state *s)
557 {
558 struct dmabuf* db = &s->dma_adc;
559 unsigned long flags;
560 u32 temp;
561
562 spin_lock_irqsave(&s->lock, flags);
563
564 if (db->stopped) {
565 spin_unlock_irqrestore(&s->lock, flags);
566 return;
567 }
568
569 /* deactivate the dma */
570 outl(0, s->io + VRC5477_ADC1_CTRL);
571 outl(0, s->io + VRC5477_ADC2_CTRL);
572
573 /* disable adc slots in aclink */
574 temp = inl(s->io + VRC5477_CTRL);
575 temp &= ~ (VRC5477_CTRL_ADC1ENB | VRC5477_CTRL_ADC2ENB);
576 outl (temp, s->io + VRC5477_CTRL);
577
578 /* disable interrupts */
579 temp = inl(s->io + VRC5477_INT_MASK);
580 temp &= ~ (VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END);
581 outl (temp, s->io + VRC5477_INT_MASK);
582
583 /* clear pending ones */
584 outl(VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END,
585 s->io + VRC5477_INT_CLR);
586
587 db->stopped = 1;
588
589 spin_unlock_irqrestore(&s->lock, flags);
590 }
591
592 static void start_adc(struct vrc5477_ac97_state *s)
593 {
594 struct dmabuf* db = &s->dma_adc;
595 unsigned long flags;
596 u32 dmaLength;
597 u32 temp;
598
599 spin_lock_irqsave(&s->lock, flags);
600
601 if (!db->stopped) {
602 spin_unlock_irqrestore(&s->lock, flags);
603 return;
604 }
605
606 /* we should at least have some free space in the buffer */
607 ASSERT(db->count < db->fragTotalSize - db->fragSize * 2);
608
609 /* clear pending ones */
610 outl(VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END,
611 s->io + VRC5477_INT_CLR);
612
613 /* enable interrupts */
614 temp = inl(s->io + VRC5477_INT_MASK);
615 temp |= VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END;
616 outl(temp, s->io + VRC5477_INT_MASK);
617
618 /* setup dma base addr */
619 outl(db->lbufDma + db->nextIn, s->io + VRC5477_ADC1_BADDR);
620 outl(db->rbufDma + db->nextIn, s->io + VRC5477_ADC2_BADDR);
621
622 /* setup dma length */
623 dmaLength = db->fragSize >> 4;
624 outl(dmaLength, s->io + VRC5477_ADC1L);
625 outl(dmaLength, s->io + VRC5477_ADC2L);
626
627 /* activate dma */
628 outl(VRC5477_DMA_ACTIVATION, s->io + VRC5477_ADC1_CTRL);
629 outl(VRC5477_DMA_ACTIVATION, s->io + VRC5477_ADC2_CTRL);
630
631 /* enable adc slots */
632 temp = inl(s->io + VRC5477_CTRL);
633 temp |= (VRC5477_CTRL_ADC1ENB | VRC5477_CTRL_ADC2ENB);
634 outl (temp, s->io + VRC5477_CTRL);
635
636 /* it is time to setup next dma transfer */
637 temp = db->nextIn + db->fragSize;
638 if (temp >= db->fragTotalSize) {
639 ASSERT(temp == db->fragTotalSize);
640 temp = 0;
641 }
642 outl(db->lbufDma + temp, s->io + VRC5477_ADC1_BADDR);
643 outl(db->rbufDma + temp, s->io + VRC5477_ADC2_BADDR);
644
645 db->stopped = 0;
646
647 spin_unlock_irqrestore(&s->lock, flags);
648 }
649
650 /* --------------------------------------------------------------------- */
651
652 #define DMABUF_DEFAULTORDER (16-PAGE_SHIFT)
653 #define DMABUF_MINORDER 1
654
655 extern inline void dealloc_dmabuf(struct vrc5477_ac97_state *s,
656 struct dmabuf *db)
657 {
658 if (db->lbuf) {
659 ASSERT(db->rbuf);
660 pci_free_consistent(s->dev, PAGE_SIZE << db->bufOrder,
661 db->lbuf, db->lbufDma);
662 pci_free_consistent(s->dev, PAGE_SIZE << db->bufOrder,
663 db->rbuf, db->rbufDma);
664 db->lbuf = db->rbuf = NULL;
665 }
666 db->nextIn = db->nextOut = 0;
667 db->ready = 0;
668 }
669
670 static int prog_dmabuf(struct vrc5477_ac97_state *s,
671 struct dmabuf *db,
672 unsigned rate)
673 {
674 int order;
675 unsigned bufsize;
676
677 if (!db->lbuf) {
678 ASSERT(!db->rbuf);
679
680 db->ready = 0;
681 for (order = DMABUF_DEFAULTORDER;
682 order >= DMABUF_MINORDER;
683 order--) {
684 db->lbuf = pci_alloc_consistent(s->dev,
685 PAGE_SIZE << order,
686 &db->lbufDma);
687 db->rbuf = pci_alloc_consistent(s->dev,
688 PAGE_SIZE << order,
689 &db->rbufDma);
690 if (db->lbuf && db->rbuf) break;
691 if (db->lbuf) {
692 ASSERT(!db->rbuf);
693 pci_free_consistent(s->dev,
694 PAGE_SIZE << order,
695 db->lbuf,
696 db->lbufDma);
697 }
698 }
699 if (!db->lbuf) {
700 ASSERT(!db->rbuf);
701 return -ENOMEM;
702 }
703
704 db->bufOrder = order;
705 }
706
707 db->count = 0;
708 db->nextIn = db->nextOut = 0;
709
710 bufsize = PAGE_SIZE << db->bufOrder;
711 db->fragShift = ld2(rate * 2 / 100);
712 if (db->fragShift < 4) db->fragShift = 4;
713
714 db->numFrag = bufsize >> db->fragShift;
715 while (db->numFrag < 4 && db->fragShift > 4) {
716 db->fragShift--;
717 db->numFrag = bufsize >> db->fragShift;
718 }
719 db->fragSize = 1 << db->fragShift;
720 db->fragTotalSize = db->numFrag << db->fragShift;
721 memset(db->lbuf, 0, db->fragTotalSize);
722 memset(db->rbuf, 0, db->fragTotalSize);
723
724 db->ready = 1;
725
726 return 0;
727 }
728
729 static inline int prog_dmabuf_adc(struct vrc5477_ac97_state *s)
730 {
731 stop_adc(s);
732 return prog_dmabuf(s, &s->dma_adc, s->adcRate);
733 }
734
735 static inline int prog_dmabuf_dac(struct vrc5477_ac97_state *s)
736 {
737 stop_dac(s);
738 return prog_dmabuf(s, &s->dma_dac, s->dacRate);
739 }
740
741
742 /* --------------------------------------------------------------------- */
743 /* hold spinlock for the following! */
744
745 static inline void vrc5477_ac97_adc_interrupt(struct vrc5477_ac97_state *s)
746 {
747 struct dmabuf* adc = &s->dma_adc;
748 unsigned temp;
749
750 /* we need two frags avaiable because one is already being used
751 * and the other will be used when next interrupt happens.
752 */
753 if (adc->count >= adc->fragTotalSize - adc->fragSize) {
754 stop_adc(s);
755 adc->error++;
756 printk(KERN_INFO PFX "adc overrun\n");
757 return;
758 }
759
760 /* set the base addr for next DMA transfer */
761 temp = adc->nextIn + 2*adc->fragSize;
762 if (temp >= adc->fragTotalSize) {
763 ASSERT( (temp == adc->fragTotalSize) ||
764 (temp == adc->fragTotalSize + adc->fragSize) );
765 temp -= adc->fragTotalSize;
766 }
767 outl(adc->lbufDma + temp, s->io + VRC5477_ADC1_BADDR);
768 outl(adc->rbufDma + temp, s->io + VRC5477_ADC2_BADDR);
769
770 /* adjust nextIn */
771 adc->nextIn += adc->fragSize;
772 if (adc->nextIn >= adc->fragTotalSize) {
773 ASSERT(adc->nextIn == adc->fragTotalSize);
774 adc->nextIn = 0;
775 }
776
777 /* adjust count */
778 adc->count += adc->fragSize;
779
780 /* wake up anybody listening */
781 if (waitqueue_active(&adc->wait)) {
782 wake_up_interruptible(&adc->wait);
783 }
784 }
785
786 static inline void vrc5477_ac97_dac_interrupt(struct vrc5477_ac97_state *s)
787 {
788 struct dmabuf* dac = &s->dma_dac;
789 unsigned temp;
790
791 /* next DMA transfer should already started */
792 // ASSERT(inl(s->io + VRC5477_DAC1_CTRL) & VRC5477_DMA_WIP);
793 // ASSERT(inl(s->io + VRC5477_DAC2_CTRL) & VRC5477_DMA_WIP);
794
795 /* let us set for next next DMA transfer */
796 temp = dac->nextOut + dac->fragSize*2;
797 if (temp >= dac->fragTotalSize) {
798 ASSERT( (temp == dac->fragTotalSize) ||
799 (temp == dac->fragTotalSize + dac->fragSize) );
800 temp -= dac->fragTotalSize;
801 }
802 outl(dac->lbufDma + temp, s->io + VRC5477_DAC1_BADDR);
803 if (s->dacChannels == 1) {
804 outl(dac->lbufDma + temp, s->io + VRC5477_DAC2_BADDR);
805 } else {
806 outl(dac->rbufDma + temp, s->io + VRC5477_DAC2_BADDR);
807 }
808
809 #if defined(VRC5477_AC97_VERBOSE_DEBUG)
810 if (*(u16*)(dac->lbuf + dac->nextOut) != outTicket) {
811 printk("assert fail: - %d vs %d\n",
812 *(u16*)(dac->lbuf + dac->nextOut),
813 outTicket);
814 ASSERT(1 == 0);
815 }
816 #endif
817
818 /* adjust nextOut pointer */
819 dac->nextOut += dac->fragSize;
820 if (dac->nextOut >= dac->fragTotalSize) {
821 ASSERT(dac->nextOut == dac->fragTotalSize);
822 dac->nextOut = 0;
823 }
824
825 /* adjust count */
826 dac->count -= dac->fragSize;
827 if (dac->count <=0 ) {
828 /* buffer under run */
829 dac->count = 0;
830 dac->nextIn = dac->nextOut;
831 stop_dac(s);
832 }
833
834 #if defined(VRC5477_AC97_VERBOSE_DEBUG)
835 if (dac->count) {
836 outTicket ++;
837 ASSERT(*(u16*)(dac->lbuf + dac->nextOut) == outTicket);
838 }
839 #endif
840
841 /* we cannot have both under run and someone is waiting on us */
842 ASSERT(! (waitqueue_active(&dac->wait) && (dac->count <= 0)) );
843
844 /* wake up anybody listening */
845 if (waitqueue_active(&dac->wait))
846 wake_up_interruptible(&dac->wait);
847 }
848
849 static irqreturn_t vrc5477_ac97_interrupt(int irq, void *dev_id, struct pt_regs *regs)
850 {
851 struct vrc5477_ac97_state *s = (struct vrc5477_ac97_state *)dev_id;
852 u32 irqStatus;
853 u32 adcInterrupts, dacInterrupts;
854
855 spin_lock(&s->lock);
856
857 /* get irqStatus and clear the detected ones */
858 irqStatus = inl(s->io + VRC5477_INT_STATUS);
859 outl(irqStatus, s->io + VRC5477_INT_CLR);
860
861 /* let us see what we get */
862 dacInterrupts = VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END;
863 adcInterrupts = VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END;
864 if (irqStatus & dacInterrupts) {
865 /* we should get both interrupts, but just in case ... */
866 if (irqStatus & VRC5477_INT_MASK_DAC1END) {
867 vrc5477_ac97_dac_interrupt(s);
868 }
869 if ( (irqStatus & dacInterrupts) != dacInterrupts ) {
870 printk(KERN_WARNING "vrc5477_ac97 : dac interrupts not in sync!!!\n");
871 stop_dac(s);
872 start_dac(s);
873 }
874 } else if (irqStatus & adcInterrupts) {
875 /* we should get both interrupts, but just in case ... */
876 if(irqStatus & VRC5477_INT_MASK_ADC1END) {
877 vrc5477_ac97_adc_interrupt(s);
878 }
879 if ( (irqStatus & adcInterrupts) != adcInterrupts ) {
880 printk(KERN_WARNING "vrc5477_ac97 : adc interrupts not in sync!!!\n");
881 stop_adc(s);
882 start_adc(s);
883 }
884 }
885
886 spin_unlock(&s->lock);
887 return IRQ_HANDLED;
888 }
889
890 /* --------------------------------------------------------------------- */
891
892 static int vrc5477_ac97_open_mixdev(struct inode *inode, struct file *file)
893 {
894 int minor = iminor(inode);
895 struct list_head *list;
896 struct vrc5477_ac97_state *s;
897
898 for (list = devs.next; ; list = list->next) {
899 if (list == &devs)
900 return -ENODEV;
901 s = list_entry(list, struct vrc5477_ac97_state, devs);
902 if (s->codec->dev_mixer == minor)
903 break;
904 }
905 file->private_data = s;
906 return nonseekable_open(inode, file);
907 }
908
909 static int vrc5477_ac97_release_mixdev(struct inode *inode, struct file *file)
910 {
911 return 0;
912 }
913
914
915 static int mixdev_ioctl(struct ac97_codec *codec, unsigned int cmd,
916 unsigned long arg)
917 {
918 return codec->mixer_ioctl(codec, cmd, arg);
919 }
920
921 static int vrc5477_ac97_ioctl_mixdev(struct inode *inode, struct file *file,
922 unsigned int cmd, unsigned long arg)
923 {
924 struct vrc5477_ac97_state *s =
925 (struct vrc5477_ac97_state *)file->private_data;
926 struct ac97_codec *codec = s->codec;
927
928 return mixdev_ioctl(codec, cmd, arg);
929 }
930
931 static /*const*/ struct file_operations vrc5477_ac97_mixer_fops = {
932 .owner = THIS_MODULE,
933 .llseek = no_llseek,
934 .ioctl = vrc5477_ac97_ioctl_mixdev,
935 .open = vrc5477_ac97_open_mixdev,
936 .release = vrc5477_ac97_release_mixdev,
937 };
938
939 /* --------------------------------------------------------------------- */
940
941 static int drain_dac(struct vrc5477_ac97_state *s, int nonblock)
942 {
943 unsigned long flags;
944 int count, tmo;
945
946 if (!s->dma_dac.ready)
947 return 0;
948
949 for (;;) {
950 spin_lock_irqsave(&s->lock, flags);
951 count = s->dma_dac.count;
952 spin_unlock_irqrestore(&s->lock, flags);
953 if (count <= 0)
954 break;
955 if (signal_pending(current))
956 break;
957 if (nonblock)
958 return -EBUSY;
959 tmo = 1000 * count / s->dacRate / 2;
960 vrc5477_ac97_delay(tmo);
961 }
962 if (signal_pending(current))
963 return -ERESTARTSYS;
964 return 0;
965 }
966
967 /* --------------------------------------------------------------------- */
968
969 static inline int
970 copy_two_channel_adc_to_user(struct vrc5477_ac97_state *s,
971 char *buffer,
972 int copyCount)
973 {
974 struct dmabuf *db = &s->dma_adc;
975 int bufStart = db->nextOut;
976 for (; copyCount > 0; ) {
977 int i;
978 int count = copyCount;
979 if (count > WORK_BUF_SIZE/2) count = WORK_BUF_SIZE/2;
980 for (i=0; i< count/2; i++) {
981 s->workBuf[i].lchannel =
982 *(u16*)(db->lbuf + bufStart + i*2);
983 s->workBuf[i].rchannel =
984 *(u16*)(db->rbuf + bufStart + i*2);
985 }
986 if (copy_to_user(buffer, s->workBuf, count*2)) {
987 return -1;
988 }
989
990 copyCount -= count;
991 bufStart += count;
992 ASSERT(bufStart <= db->fragTotalSize);
993 buffer += count *2;
994 }
995 return 0;
996 }
997
998 /* return the total bytes that is copied */
999 static inline int
1000 copy_adc_to_user(struct vrc5477_ac97_state *s,
1001 char * buffer,
1002 size_t count,
1003 int avail)
1004 {
1005 struct dmabuf *db = &s->dma_adc;
1006 int copyCount=0;
1007 int copyFragCount=0;
1008 int totalCopyCount = 0;
1009 int totalCopyFragCount = 0;
1010 unsigned long flags;
1011
1012 /* adjust count to signel channel byte count */
1013 count >>= s->adcChannels - 1;
1014
1015 /* we may have to "copy" twice as ring buffer wraps around */
1016 for (; (avail > 0) && (count > 0); ) {
1017 /* determine max possible copy count for single channel */
1018 copyCount = count;
1019 if (copyCount > avail) {
1020 copyCount = avail;
1021 }
1022 if (copyCount + db->nextOut > db->fragTotalSize) {
1023 copyCount = db->fragTotalSize - db->nextOut;
1024 ASSERT((copyCount % db->fragSize) == 0);
1025 }
1026
1027 copyFragCount = (copyCount-1) >> db->fragShift;
1028 copyFragCount = (copyFragCount+1) << db->fragShift;
1029 ASSERT(copyFragCount >= copyCount);
1030
1031 /* we copy differently based on adc channels */
1032 if (s->adcChannels == 1) {
1033 if (copy_to_user(buffer,
1034 db->lbuf + db->nextOut,
1035 copyCount))
1036 return -1;
1037 } else {
1038 /* *sigh* we have to mix two streams into one */
1039 if (copy_two_channel_adc_to_user(s, buffer, copyCount))
1040 return -1;
1041 }
1042
1043 count -= copyCount;
1044 totalCopyCount += copyCount;
1045 avail -= copyFragCount;
1046 totalCopyFragCount += copyFragCount;
1047
1048 buffer += copyCount << (s->adcChannels-1);
1049
1050 db->nextOut += copyFragCount;
1051 if (db->nextOut >= db->fragTotalSize) {
1052 ASSERT(db->nextOut == db->fragTotalSize);
1053 db->nextOut = 0;
1054 }
1055
1056 ASSERT((copyFragCount % db->fragSize) == 0);
1057 ASSERT( (count == 0) || (copyCount == copyFragCount));
1058 }
1059
1060 spin_lock_irqsave(&s->lock, flags);
1061 db->count -= totalCopyFragCount;
1062 spin_unlock_irqrestore(&s->lock, flags);
1063
1064 return totalCopyCount << (s->adcChannels-1);
1065 }
1066
1067 static ssize_t
1068 vrc5477_ac97_read(struct file *file,
1069 char *buffer,
1070 size_t count,
1071 loff_t *ppos)
1072 {
1073 struct vrc5477_ac97_state *s =
1074 (struct vrc5477_ac97_state *)file->private_data;
1075 struct dmabuf *db = &s->dma_adc;
1076 ssize_t ret = 0;
1077 unsigned long flags;
1078 int copyCount;
1079 size_t avail;
1080
1081 if (!access_ok(VERIFY_WRITE, buffer, count))
1082 return -EFAULT;
1083
1084 ASSERT(db->ready);
1085
1086 while (count > 0) {
1087 // wait for samples in capture buffer
1088 do {
1089 spin_lock_irqsave(&s->lock, flags);
1090 if (db->stopped)
1091 start_adc(s);
1092 avail = db->count;
1093 spin_unlock_irqrestore(&s->lock, flags);
1094 if (avail <= 0) {
1095 if (file->f_flags & O_NONBLOCK) {
1096 if (!ret)
1097 ret = -EAGAIN;
1098 return ret;
1099 }
1100 interruptible_sleep_on(&db->wait);
1101 if (signal_pending(current)) {
1102 if (!ret)
1103 ret = -ERESTARTSYS;
1104 return ret;
1105 }
1106 }
1107 } while (avail <= 0);
1108
1109 ASSERT( (avail % db->fragSize) == 0);
1110 copyCount = copy_adc_to_user(s, buffer, count, avail);
1111 if (copyCount <=0 ) {
1112 if (!ret) ret = -EFAULT;
1113 return ret;
1114 }
1115
1116 count -= copyCount;
1117 buffer += copyCount;
1118 ret += copyCount;
1119 } // while (count > 0)
1120
1121 return ret;
1122 }
1123
1124 static inline int
1125 copy_two_channel_dac_from_user(struct vrc5477_ac97_state *s,
1126 const char *buffer,
1127 int copyCount)
1128 {
1129 struct dmabuf *db = &s->dma_dac;
1130 int bufStart = db->nextIn;
1131
1132 ASSERT(db->ready);
1133
1134 for (; copyCount > 0; ) {
1135 int i;
1136 int count = copyCount;
1137 if (count > WORK_BUF_SIZE/2) count = WORK_BUF_SIZE/2;
1138 if (copy_from_user(s->workBuf, buffer, count*2)) {
1139 return -1;
1140 }
1141 for (i=0; i< count/2; i++) {
1142 *(u16*)(db->lbuf + bufStart + i*2) =
1143 s->workBuf[i].lchannel;
1144 *(u16*)(db->rbuf + bufStart + i*2) =
1145 s->workBuf[i].rchannel;
1146 }
1147
1148 copyCount -= count;
1149 bufStart += count;
1150 ASSERT(bufStart <= db->fragTotalSize);
1151 buffer += count *2;
1152 }
1153 return 0;
1154
1155 }
1156
1157 /* return the total bytes that is copied */
1158 static inline int
1159 copy_dac_from_user(struct vrc5477_ac97_state *s,
1160 const char *buffer,
1161 size_t count,
1162 int avail)
1163 {
1164 struct dmabuf *db = &s->dma_dac;
1165 int copyCount=0;
1166 int copyFragCount=0;
1167 int totalCopyCount = 0;
1168 int totalCopyFragCount = 0;
1169 unsigned long flags;
1170 #if defined(VRC5477_AC97_VERBOSE_DEBUG)
1171 int i;
1172 #endif
1173
1174 /* adjust count to signel channel byte count */
1175 count >>= s->dacChannels - 1;
1176
1177 /* we may have to "copy" twice as ring buffer wraps around */
1178 for (; (avail > 0) && (count > 0); ) {
1179 /* determine max possible copy count for single channel */
1180 copyCount = count;
1181 if (copyCount > avail) {
1182 copyCount = avail;
1183 }
1184 if (copyCount + db->nextIn > db->fragTotalSize) {
1185 copyCount = db->fragTotalSize - db->nextIn;
1186 ASSERT(copyCount > 0);
1187 }
1188
1189 copyFragCount = copyCount;
1190 ASSERT(copyFragCount >= copyCount);
1191
1192 /* we copy differently based on the number channels */
1193 if (s->dacChannels == 1) {
1194 if (copy_from_user(db->lbuf + db->nextIn,
1195 buffer,
1196 copyCount))
1197 return -1;
1198 /* fill gaps with 0 */
1199 memset(db->lbuf + db->nextIn + copyCount,
1200 0,
1201 copyFragCount - copyCount);
1202 } else {
1203 /* we have demux the stream into two separate ones */
1204 if (copy_two_channel_dac_from_user(s, buffer, copyCount))
1205 return -1;
1206 /* fill gaps with 0 */
1207 memset(db->lbuf + db->nextIn + copyCount,
1208 0,
1209 copyFragCount - copyCount);
1210 memset(db->rbuf + db->nextIn + copyCount,
1211 0,
1212 copyFragCount - copyCount);
1213 }
1214
1215 #if defined(VRC5477_AC97_VERBOSE_DEBUG)
1216 for (i=0; i< copyFragCount; i+= db->fragSize) {
1217 *(u16*)(db->lbuf + db->nextIn + i) = inTicket ++;
1218 }
1219 #endif
1220
1221 count -= copyCount;
1222 totalCopyCount += copyCount;
1223 avail -= copyFragCount;
1224 totalCopyFragCount += copyFragCount;
1225
1226 buffer += copyCount << (s->dacChannels - 1);
1227
1228 db->nextIn += copyFragCount;
1229 if (db->nextIn >= db->fragTotalSize) {
1230 ASSERT(db->nextIn == db->fragTotalSize);
1231 db->nextIn = 0;
1232 }
1233
1234 ASSERT( (count == 0) || (copyCount == copyFragCount));
1235 }
1236
1237 spin_lock_irqsave(&s->lock, flags);
1238 db->count += totalCopyFragCount;
1239 if (db->stopped) {
1240 start_dac(s);
1241 }
1242
1243 /* nextIn should not be equal to nextOut unless we are full */
1244 ASSERT( ( (db->count == db->fragTotalSize) &&
1245 (db->nextIn == db->nextOut) ) ||
1246 ( (db->count < db->fragTotalSize) &&
1247 (db->nextIn != db->nextOut) ) );
1248
1249 spin_unlock_irqrestore(&s->lock, flags);
1250
1251 return totalCopyCount << (s->dacChannels-1);
1252
1253 }
1254
1255 static ssize_t vrc5477_ac97_write(struct file *file, const char *buffer,
1256 size_t count, loff_t *ppos)
1257 {
1258 struct vrc5477_ac97_state *s =
1259 (struct vrc5477_ac97_state *)file->private_data;
1260 struct dmabuf *db = &s->dma_dac;
1261 ssize_t ret;
1262 unsigned long flags;
1263 int copyCount, avail;
1264
1265 if (!access_ok(VERIFY_READ, buffer, count))
1266 return -EFAULT;
1267 ret = 0;
1268
1269 while (count > 0) {
1270 // wait for space in playback buffer
1271 do {
1272 spin_lock_irqsave(&s->lock, flags);
1273 avail = db->fragTotalSize - db->count;
1274 spin_unlock_irqrestore(&s->lock, flags);
1275 if (avail <= 0) {
1276 if (file->f_flags & O_NONBLOCK) {
1277 if (!ret)
1278 ret = -EAGAIN;
1279 return ret;
1280 }
1281 interruptible_sleep_on(&db->wait);
1282 if (signal_pending(current)) {
1283 if (!ret)
1284 ret = -ERESTARTSYS;
1285 return ret;
1286 }
1287 }
1288 } while (avail <= 0);
1289
1290 copyCount = copy_dac_from_user(s, buffer, count, avail);
1291 if (copyCount < 0) {
1292 if (!ret) ret = -EFAULT;
1293 return ret;
1294 }
1295
1296 count -= copyCount;
1297 buffer += copyCount;
1298 ret += copyCount;
1299 } // while (count > 0)
1300
1301 return ret;
1302 }
1303
1304 /* No kernel lock - we have our own spinlock */
1305 static unsigned int vrc5477_ac97_poll(struct file *file,
1306 struct poll_table_struct *wait)
1307 {
1308 struct vrc5477_ac97_state *s = (struct vrc5477_ac97_state *)file->private_data;
1309 unsigned long flags;
1310 unsigned int mask = 0;
1311
1312 if (file->f_mode & FMODE_WRITE)
1313 poll_wait(file, &s->dma_dac.wait, wait);
1314 if (file->f_mode & FMODE_READ)
1315 poll_wait(file, &s->dma_adc.wait, wait);
1316 spin_lock_irqsave(&s->lock, flags);
1317 if (file->f_mode & FMODE_READ) {
1318 if (s->dma_adc.count >= (signed)s->dma_adc.fragSize)
1319 mask |= POLLIN | POLLRDNORM;
1320 }
1321 if (file->f_mode & FMODE_WRITE) {
1322 if ((signed)s->dma_dac.fragTotalSize >=
1323 s->dma_dac.count + (signed)s->dma_dac.fragSize)
1324 mask |= POLLOUT | POLLWRNORM;
1325 }
1326 spin_unlock_irqrestore(&s->lock, flags);
1327 return mask;
1328 }
1329
1330 #ifdef VRC5477_AC97_DEBUG
1331 static struct ioctl_str_t {
1332 unsigned int cmd;
1333 const char* str;
1334 } ioctl_str[] = {
1335 {SNDCTL_DSP_RESET, "SNDCTL_DSP_RESET"},
1336 {SNDCTL_DSP_SYNC, "SNDCTL_DSP_SYNC"},
1337 {SNDCTL_DSP_SPEED, "SNDCTL_DSP_SPEED"},
1338 {SNDCTL_DSP_STEREO, "SNDCTL_DSP_STEREO"},
1339 {SNDCTL_DSP_GETBLKSIZE, "SNDCTL_DSP_GETBLKSIZE"},
1340 {SNDCTL_DSP_SETFMT, "SNDCTL_DSP_SETFMT"},
1341 {SNDCTL_DSP_SAMPLESIZE, "SNDCTL_DSP_SAMPLESIZE"},
1342 {SNDCTL_DSP_CHANNELS, "SNDCTL_DSP_CHANNELS"},
1343 {SOUND_PCM_WRITE_CHANNELS, "SOUND_PCM_WRITE_CHANNELS"},
1344 {SOUND_PCM_WRITE_FILTER, "SOUND_PCM_WRITE_FILTER"},
1345 {SNDCTL_DSP_POST, "SNDCTL_DSP_POST"},
1346 {SNDCTL_DSP_SUBDIVIDE, "SNDCTL_DSP_SUBDIVIDE"},
1347 {SNDCTL_DSP_SETFRAGMENT, "SNDCTL_DSP_SETFRAGMENT"},
1348 {SNDCTL_DSP_GETFMTS, "SNDCTL_DSP_GETFMTS"},
1349 {SNDCTL_DSP_GETOSPACE, "SNDCTL_DSP_GETOSPACE"},
1350 {SNDCTL_DSP_GETISPACE, "SNDCTL_DSP_GETISPACE"},
1351 {SNDCTL_DSP_NONBLOCK, "SNDCTL_DSP_NONBLOCK"},
1352 {SNDCTL_DSP_GETCAPS, "SNDCTL_DSP_GETCAPS"},
1353 {SNDCTL_DSP_GETTRIGGER, "SNDCTL_DSP_GETTRIGGER"},
1354 {SNDCTL_DSP_SETTRIGGER, "SNDCTL_DSP_SETTRIGGER"},
1355 {SNDCTL_DSP_GETIPTR, "SNDCTL_DSP_GETIPTR"},
1356 {SNDCTL_DSP_GETOPTR, "SNDCTL_DSP_GETOPTR"},
1357 {SNDCTL_DSP_MAPINBUF, "SNDCTL_DSP_MAPINBUF"},
1358 {SNDCTL_DSP_MAPOUTBUF, "SNDCTL_DSP_MAPOUTBUF"},
1359 {SNDCTL_DSP_SETSYNCRO, "SNDCTL_DSP_SETSYNCRO"},
1360 {SNDCTL_DSP_SETDUPLEX, "SNDCTL_DSP_SETDUPLEX"},
1361 {SNDCTL_DSP_GETODELAY, "SNDCTL_DSP_GETODELAY"},
1362 {SNDCTL_DSP_GETCHANNELMASK, "SNDCTL_DSP_GETCHANNELMASK"},
1363 {SNDCTL_DSP_BIND_CHANNEL, "SNDCTL_DSP_BIND_CHANNEL"},
1364 {OSS_GETVERSION, "OSS_GETVERSION"},
1365 {SOUND_PCM_READ_RATE, "SOUND_PCM_READ_RATE"},
1366 {SOUND_PCM_READ_CHANNELS, "SOUND_PCM_READ_CHANNELS"},
1367 {SOUND_PCM_READ_BITS, "SOUND_PCM_READ_BITS"},
1368 {SOUND_PCM_READ_FILTER, "SOUND_PCM_READ_FILTER"}
1369 };
1370 #endif
1371
1372 static int vrc5477_ac97_ioctl(struct inode *inode, struct file *file,
1373 unsigned int cmd, unsigned long arg)
1374 {
1375 struct vrc5477_ac97_state *s = (struct vrc5477_ac97_state *)file->private_data;
1376 unsigned long flags;
1377 audio_buf_info abinfo;
1378 int count;
1379 int val, ret;
1380
1381 #ifdef VRC5477_AC97_DEBUG
1382 for (count=0; count<sizeof(ioctl_str)/sizeof(ioctl_str[0]); count++) {
1383 if (ioctl_str[count].cmd == cmd)
1384 break;
1385 }
1386 if (count < sizeof(ioctl_str)/sizeof(ioctl_str[0]))
1387 printk(KERN_INFO PFX "ioctl %s\n", ioctl_str[count].str);
1388 else
1389 printk(KERN_INFO PFX "ioctl unknown, 0x%x\n", cmd);
1390 #endif
1391
1392 switch (cmd) {
1393 case OSS_GETVERSION:
1394 return put_user(SOUND_VERSION, (int *)arg);
1395
1396 case SNDCTL_DSP_SYNC:
1397 if (file->f_mode & FMODE_WRITE)
1398 return drain_dac(s, file->f_flags & O_NONBLOCK);
1399 return 0;
1400
1401 case SNDCTL_DSP_SETDUPLEX:
1402 return 0;
1403
1404 case SNDCTL_DSP_GETCAPS:
1405 return put_user(DSP_CAP_DUPLEX, (int *)arg);
1406
1407 case SNDCTL_DSP_RESET:
1408 if (file->f_mode & FMODE_WRITE) {
1409 stop_dac(s);
1410 synchronize_irq(s->irq);
1411 s->dma_dac.count = 0;
1412 s->dma_dac.nextIn = s->dma_dac.nextOut = 0;
1413 }
1414 if (file->f_mode & FMODE_READ) {
1415 stop_adc(s);
1416 synchronize_irq(s->irq);
1417 s->dma_adc.count = 0;
1418 s->dma_adc.nextIn = s->dma_adc.nextOut = 0;
1419 }
1420 return 0;
1421
1422 case SNDCTL_DSP_SPEED:
1423 if (get_user(val, (int *)arg))
1424 return -EFAULT;
1425 if (val >= 0) {
1426 if (file->f_mode & FMODE_READ) {
1427 stop_adc(s);
1428 set_adc_rate(s, val);
1429 if ((ret = prog_dmabuf_adc(s)))
1430 return ret;
1431 }
1432 if (file->f_mode & FMODE_WRITE) {
1433 stop_dac(s);
1434 set_dac_rate(s, val);
1435 if ((ret = prog_dmabuf_dac(s)))
1436 return ret;
1437 }
1438 }
1439 return put_user((file->f_mode & FMODE_READ) ?
1440 s->adcRate : s->dacRate, (int *)arg);
1441
1442 case SNDCTL_DSP_STEREO:
1443 if (get_user(val, (int *)arg))
1444 return -EFAULT;
1445 if (file->f_mode & FMODE_READ) {
1446 stop_adc(s);
1447 if (val)
1448 s->adcChannels = 2;
1449 else
1450 s->adcChannels = 1;
1451 if ((ret = prog_dmabuf_adc(s)))
1452 return ret;
1453 }
1454 if (file->f_mode & FMODE_WRITE) {
1455 stop_dac(s);
1456 if (val)
1457 s->dacChannels = 2;
1458 else
1459 s->dacChannels = 1;
1460 if ((ret = prog_dmabuf_dac(s)))
1461 return ret;
1462 }
1463 return 0;
1464
1465 case SNDCTL_DSP_CHANNELS:
1466 if (get_user(val, (int *)arg))
1467 return -EFAULT;
1468 if (val != 0) {
1469 if ( (val != 1) && (val != 2)) val = 2;
1470
1471 if (file->f_mode & FMODE_READ) {
1472 stop_adc(s);
1473 s->dacChannels = val;
1474 if ((ret = prog_dmabuf_adc(s)))
1475 return ret;
1476 }
1477 if (file->f_mode & FMODE_WRITE) {
1478 stop_dac(s);
1479 s->dacChannels = val;
1480 if ((ret = prog_dmabuf_dac(s)))
1481 return ret;
1482 }
1483 }
1484 return put_user(val, (int *)arg);
1485
1486 case SNDCTL_DSP_GETFMTS: /* Returns a mask */
1487 return put_user(AFMT_S16_LE, (int *)arg);
1488
1489 case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/
1490 if (get_user(val, (int *)arg))
1491 return -EFAULT;
1492 if (val != AFMT_QUERY) {
1493 if (val != AFMT_S16_LE) return -EINVAL;
1494 if (file->f_mode & FMODE_READ) {
1495 stop_adc(s);
1496 if ((ret = prog_dmabuf_adc(s)))
1497 return ret;
1498 }
1499 if (file->f_mode & FMODE_WRITE) {
1500 stop_dac(s);
1501 if ((ret = prog_dmabuf_dac(s)))
1502 return ret;
1503 }
1504 } else {
1505 val = AFMT_S16_LE;
1506 }
1507 return put_user(val, (int *)arg);
1508
1509 case SNDCTL_DSP_POST:
1510 return 0;
1511
1512 case SNDCTL_DSP_GETTRIGGER:
1513 case SNDCTL_DSP_SETTRIGGER:
1514 /* NO trigger */
1515 return -EINVAL;
1516
1517 case SNDCTL_DSP_GETOSPACE:
1518 if (!(file->f_mode & FMODE_WRITE))
1519 return -EINVAL;
1520 abinfo.fragsize = s->dma_dac.fragSize << (s->dacChannels-1);
1521 spin_lock_irqsave(&s->lock, flags);
1522 count = s->dma_dac.count;
1523 spin_unlock_irqrestore(&s->lock, flags);
1524 abinfo.bytes = (s->dma_dac.fragTotalSize - count) <<
1525 (s->dacChannels-1);
1526 abinfo.fragstotal = s->dma_dac.numFrag;
1527 abinfo.fragments = abinfo.bytes >> s->dma_dac.fragShift >>
1528 (s->dacChannels-1);
1529 return copy_to_user((void *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
1530
1531 case SNDCTL_DSP_GETISPACE:
1532 if (!(file->f_mode & FMODE_READ))
1533 return -EINVAL;
1534 abinfo.fragsize = s->dma_adc.fragSize << (s->adcChannels-1);
1535 spin_lock_irqsave(&s->lock, flags);
1536 count = s->dma_adc.count;
1537 spin_unlock_irqrestore(&s->lock, flags);
1538 if (count < 0)
1539 count = 0;
1540 abinfo.bytes = count << (s->adcChannels-1);
1541 abinfo.fragstotal = s->dma_adc.numFrag;
1542 abinfo.fragments = (abinfo.bytes >> s->dma_adc.fragShift) >>
1543 (s->adcChannels-1);
1544 return copy_to_user((void *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
1545
1546 case SNDCTL_DSP_NONBLOCK:
1547 file->f_flags |= O_NONBLOCK;
1548 return 0;
1549
1550 case SNDCTL_DSP_GETODELAY:
1551 if (!(file->f_mode & FMODE_WRITE))
1552 return -EINVAL;
1553 spin_lock_irqsave(&s->lock, flags);
1554 count = s->dma_dac.count;
1555 spin_unlock_irqrestore(&s->lock, flags);
1556 return put_user(count, (int *)arg);
1557
1558 case SNDCTL_DSP_GETIPTR:
1559 case SNDCTL_DSP_GETOPTR:
1560 /* we cannot get DMA ptr */
1561 return -EINVAL;
1562
1563 case SNDCTL_DSP_GETBLKSIZE:
1564 if (file->f_mode & FMODE_WRITE)
1565 return put_user(s->dma_dac.fragSize << (s->dacChannels-1), (int *)arg);
1566 else
1567 return put_user(s->dma_adc.fragSize << (s->adcChannels-1), (int *)arg);
1568
1569 case SNDCTL_DSP_SETFRAGMENT:
1570 /* we ignore fragment size request */
1571 return 0;
1572
1573 case SNDCTL_DSP_SUBDIVIDE:
1574 /* what is this for? [jsun] */
1575 return 0;
1576
1577 case SOUND_PCM_READ_RATE:
1578 return put_user((file->f_mode & FMODE_READ) ?
1579 s->adcRate : s->dacRate, (int *)arg);
1580
1581 case SOUND_PCM_READ_CHANNELS:
1582 if (file->f_mode & FMODE_READ)
1583 return put_user(s->adcChannels, (int *)arg);
1584 else
1585 return put_user(s->dacChannels ? 2 : 1, (int *)arg);
1586
1587 case SOUND_PCM_READ_BITS:
1588 return put_user(16, (int *)arg);
1589
1590 case SOUND_PCM_WRITE_FILTER:
1591 case SNDCTL_DSP_SETSYNCRO:
1592 case SOUND_PCM_READ_FILTER:
1593 return -EINVAL;
1594 }
1595
1596 return mixdev_ioctl(s->codec, cmd, arg);
1597 }
1598
1599
1600 static int vrc5477_ac97_open(struct inode *inode, struct file *file)
1601 {
1602 int minor = iminor(inode);
1603 DECLARE_WAITQUEUE(wait, current);
1604 unsigned long flags;
1605 struct list_head *list;
1606 struct vrc5477_ac97_state *s;
1607 int ret=0;
1608
1609 nonseekable_open(inode, file);
1610 for (list = devs.next; ; list = list->next) {
1611 if (list == &devs)
1612 return -ENODEV;
1613 s = list_entry(list, struct vrc5477_ac97_state, devs);
1614 if (!((s->dev_audio ^ minor) & ~0xf))
1615 break;
1616 }
1617 file->private_data = s;
1618
1619 /* wait for device to become free */
1620 down(&s->open_sem);
1621 while (s->open_mode & file->f_mode) {
1622
1623 if (file->f_flags & O_NONBLOCK) {
1624 up(&s->open_sem);
1625 return -EBUSY;
1626 }
1627 add_wait_queue(&s->open_wait, &wait);
1628 __set_current_state(TASK_INTERRUPTIBLE);
1629 up(&s->open_sem);
1630 schedule();
1631 remove_wait_queue(&s->open_wait, &wait);
1632 set_current_state(TASK_RUNNING);
1633 if (signal_pending(current))
1634 return -ERESTARTSYS;
1635 down(&s->open_sem);
1636 }
1637
1638 spin_lock_irqsave(&s->lock, flags);
1639
1640 if (file->f_mode & FMODE_READ) {
1641 /* set default settings */
1642 set_adc_rate(s, 48000);
1643 s->adcChannels = 2;
1644
1645 ret = prog_dmabuf_adc(s);
1646 if (ret) goto bailout;
1647 }
1648 if (file->f_mode & FMODE_WRITE) {
1649 /* set default settings */
1650 set_dac_rate(s, 48000);
1651 s->dacChannels = 2;
1652
1653 ret = prog_dmabuf_dac(s);
1654 if (ret) goto bailout;
1655 }
1656
1657 s->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
1658
1659 bailout:
1660 spin_unlock_irqrestore(&s->lock, flags);
1661
1662 up(&s->open_sem);
1663 return ret;
1664 }
1665
1666 static int vrc5477_ac97_release(struct inode *inode, struct file *file)
1667 {
1668 struct vrc5477_ac97_state *s =
1669 (struct vrc5477_ac97_state *)file->private_data;
1670
1671 lock_kernel();
1672 if (file->f_mode & FMODE_WRITE)
1673 drain_dac(s, file->f_flags & O_NONBLOCK);
1674 down(&s->open_sem);
1675 if (file->f_mode & FMODE_WRITE) {
1676 stop_dac(s);
1677 dealloc_dmabuf(s, &s->dma_dac);
1678 }
1679 if (file->f_mode & FMODE_READ) {
1680 stop_adc(s);
1681 dealloc_dmabuf(s, &s->dma_adc);
1682 }
1683 s->open_mode &= (~file->f_mode) & (FMODE_READ|FMODE_WRITE);
1684 up(&s->open_sem);
1685 wake_up(&s->open_wait);
1686 unlock_kernel();
1687 return 0;
1688 }
1689
1690 static /*const*/ struct file_operations vrc5477_ac97_audio_fops = {
1691 .owner = THIS_MODULE,
1692 .llseek = no_llseek,
1693 .read = vrc5477_ac97_read,
1694 .write = vrc5477_ac97_write,
1695 .poll = vrc5477_ac97_poll,
1696 .ioctl = vrc5477_ac97_ioctl,
1697 // .mmap = vrc5477_ac97_mmap,
1698 .open = vrc5477_ac97_open,
1699 .release = vrc5477_ac97_release,
1700 };
1701
1702
1703 /* --------------------------------------------------------------------- */
1704
1705
1706 /* --------------------------------------------------------------------- */
1707
1708 /*
1709 * for debugging purposes, we'll create a proc device that dumps the
1710 * CODEC chipstate
1711 */
1712
1713 #ifdef VRC5477_AC97_DEBUG
1714
1715 struct {
1716 const char *regname;
1717 unsigned regaddr;
1718 } vrc5477_ac97_regs[] = {
1719 {"VRC5477_INT_STATUS", VRC5477_INT_STATUS},
1720 {"VRC5477_CODEC_WR", VRC5477_CODEC_WR},
1721 {"VRC5477_CODEC_RD", VRC5477_CODEC_RD},
1722 {"VRC5477_CTRL", VRC5477_CTRL},
1723 {"VRC5477_ACLINK_CTRL", VRC5477_ACLINK_CTRL},
1724 {"VRC5477_INT_MASK", VRC5477_INT_MASK},
1725 {"VRC5477_DAC1_CTRL", VRC5477_DAC1_CTRL},
1726 {"VRC5477_DAC1L", VRC5477_DAC1L},
1727 {"VRC5477_DAC1_BADDR", VRC5477_DAC1_BADDR},
1728 {"VRC5477_DAC2_CTRL", VRC5477_DAC2_CTRL},
1729 {"VRC5477_DAC2L", VRC5477_DAC2L},
1730 {"VRC5477_DAC2_BADDR", VRC5477_DAC2_BADDR},
1731 {"VRC5477_DAC3_CTRL", VRC5477_DAC3_CTRL},
1732 {"VRC5477_DAC3L", VRC5477_DAC3L},
1733 {"VRC5477_DAC3_BADDR", VRC5477_DAC3_BADDR},
1734 {"VRC5477_ADC1_CTRL", VRC5477_ADC1_CTRL},
1735 {"VRC5477_ADC1L", VRC5477_ADC1L},
1736 {"VRC5477_ADC1_BADDR", VRC5477_ADC1_BADDR},
1737 {"VRC5477_ADC2_CTRL", VRC5477_ADC2_CTRL},
1738 {"VRC5477_ADC2L", VRC5477_ADC2L},
1739 {"VRC5477_ADC2_BADDR", VRC5477_ADC2_BADDR},
1740 {"VRC5477_ADC3_CTRL", VRC5477_ADC3_CTRL},
1741 {"VRC5477_ADC3L", VRC5477_ADC3L},
1742 {"VRC5477_ADC3_BADDR", VRC5477_ADC3_BADDR},
1743 {NULL, 0x0}
1744 };
1745
1746 static int proc_vrc5477_ac97_dump (char *buf, char **start, off_t fpos,
1747 int length, int *eof, void *data)
1748 {
1749 struct vrc5477_ac97_state *s;
1750 int cnt, len = 0;
1751
1752 if (list_empty(&devs))
1753 return 0;
1754 s = list_entry(devs.next, struct vrc5477_ac97_state, devs);
1755
1756 /* print out header */
1757 len += sprintf(buf + len, "\n\t\tVrc5477 Audio Debug\n\n");
1758
1759 // print out digital controller state
1760 len += sprintf (buf + len, "NEC Vrc5477 Audio Controller registers\n");
1761 len += sprintf (buf + len, "---------------------------------\n");
1762 for (cnt=0; vrc5477_ac97_regs[cnt].regname != NULL; cnt++) {
1763 len+= sprintf (buf + len, "%-20s = %08x\n",
1764 vrc5477_ac97_regs[cnt].regname,
1765 inl(s->io + vrc5477_ac97_regs[cnt].regaddr));
1766 }
1767
1768 /* print out driver state */
1769 len += sprintf (buf + len, "NEC Vrc5477 Audio driver states\n");
1770 len += sprintf (buf + len, "---------------------------------\n");
1771 len += sprintf (buf + len, "dacChannels = %d\n", s->dacChannels);
1772 len += sprintf (buf + len, "adcChannels = %d\n", s->adcChannels);
1773 len += sprintf (buf + len, "dacRate = %d\n", s->dacRate);
1774 len += sprintf (buf + len, "adcRate = %d\n", s->adcRate);
1775
1776 len += sprintf (buf + len, "dma_dac is %s ready\n",
1777 s->dma_dac.ready? "" : "not");
1778 if (s->dma_dac.ready) {
1779 len += sprintf (buf + len, "dma_dac is %s stopped.\n",
1780 s->dma_dac.stopped? "" : "not");
1781 len += sprintf (buf + len, "dma_dac.fragSize = %x\n",
1782 s->dma_dac.fragSize);
1783 len += sprintf (buf + len, "dma_dac.fragShift = %x\n",
1784 s->dma_dac.fragShift);
1785 len += sprintf (buf + len, "dma_dac.numFrag = %x\n",
1786 s->dma_dac.numFrag);
1787 len += sprintf (buf + len, "dma_dac.fragTotalSize = %x\n",
1788 s->dma_dac.fragTotalSize);
1789 len += sprintf (buf + len, "dma_dac.nextIn = %x\n",
1790 s->dma_dac.nextIn);
1791 len += sprintf (buf + len, "dma_dac.nextOut = %x\n",
1792 s->dma_dac.nextOut);
1793 len += sprintf (buf + len, "dma_dac.count = %x\n",
1794 s->dma_dac.count);
1795 }
1796
1797 len += sprintf (buf + len, "dma_adc is %s ready\n",
1798 s->dma_adc.ready? "" : "not");
1799 if (s->dma_adc.ready) {
1800 len += sprintf (buf + len, "dma_adc is %s stopped.\n",
1801 s->dma_adc.stopped? "" : "not");
1802 len += sprintf (buf + len, "dma_adc.fragSize = %x\n",
1803 s->dma_adc.fragSize);
1804 len += sprintf (buf + len, "dma_adc.fragShift = %x\n",
1805 s->dma_adc.fragShift);
1806 len += sprintf (buf + len, "dma_adc.numFrag = %x\n",
1807 s->dma_adc.numFrag);
1808 len += sprintf (buf + len, "dma_adc.fragTotalSize = %x\n",
1809 s->dma_adc.fragTotalSize);
1810 len += sprintf (buf + len, "dma_adc.nextIn = %x\n",
1811 s->dma_adc.nextIn);
1812 len += sprintf (buf + len, "dma_adc.nextOut = %x\n",
1813 s->dma_adc.nextOut);
1814 len += sprintf (buf + len, "dma_adc.count = %x\n",
1815 s->dma_adc.count);
1816 }
1817
1818 /* print out CODEC state */
1819 len += sprintf (buf + len, "\nAC97 CODEC registers\n");
1820 len += sprintf (buf + len, "----------------------\n");
1821 for (cnt=0; cnt <= 0x7e; cnt = cnt +2)
1822 len+= sprintf (buf + len, "reg %02x = %04x\n",
1823 cnt, rdcodec(s->codec, cnt));
1824
1825 if (fpos >=len){
1826 *start = buf;
1827 *eof =1;
1828 return 0;
1829 }
1830 *start = buf + fpos;
1831 if ((len -= fpos) > length)
1832 return length;
1833 *eof =1;
1834 return len;
1835
1836 }
1837 #endif /* VRC5477_AC97_DEBUG */
1838
1839 /* --------------------------------------------------------------------- */
1840
1841 /* maximum number of devices; only used for command line params */
1842 #define NR_DEVICE 5
1843
1844 static unsigned int devindex;
1845
1846 MODULE_AUTHOR("Monta Vista Software, jsun@mvista.com or jsun@junsun.net");
1847 MODULE_DESCRIPTION("NEC Vrc5477 audio (AC97) Driver");
1848 MODULE_LICENSE("GPL");
1849
1850 static int __devinit vrc5477_ac97_probe(struct pci_dev *pcidev,
1851 const struct pci_device_id *pciid)
1852 {
1853 struct vrc5477_ac97_state *s;
1854 #ifdef VRC5477_AC97_DEBUG
1855 char proc_str[80];
1856 #endif
1857
1858 if (pcidev->irq == 0)
1859 return -1;
1860
1861 if (!(s = kmalloc(sizeof(struct vrc5477_ac97_state), GFP_KERNEL))) {
1862 printk(KERN_ERR PFX "alloc of device struct failed\n");
1863 return -1;
1864 }
1865 memset(s, 0, sizeof(struct vrc5477_ac97_state));
1866
1867 init_waitqueue_head(&s->dma_adc.wait);
1868 init_waitqueue_head(&s->dma_dac.wait);
1869 init_waitqueue_head(&s->open_wait);
1870 init_MUTEX(&s->open_sem);
1871 spin_lock_init(&s->lock);
1872
1873 s->dev = pcidev;
1874 s->io = pci_resource_start(pcidev, 0);
1875 s->irq = pcidev->irq;
1876
1877 s->codec = ac97_alloc_codec();
1878
1879 s->codec->private_data = s;
1880 s->codec->id = 0;
1881 s->codec->codec_read = rdcodec;
1882 s->codec->codec_write = wrcodec;
1883 s->codec->codec_wait = waitcodec;
1884
1885 /* setting some other default values such as
1886 * adcChannels, adcRate is done in open() so that
1887 * no persistent state across file opens.
1888 */
1889
1890 /* test if get response from ac97, if not return */
1891 if (ac97_codec_not_present(s->codec)) {
1892 printk(KERN_ERR PFX "no ac97 codec\n");
1893 goto err_region;
1894
1895 }
1896
1897 /* test if get response from ac97, if not return */
1898 if (ac97_codec_not_present(&(s->codec))) {
1899 printk(KERN_ERR PFX "no ac97 codec\n");
1900 goto err_region;
1901
1902 }
1903
1904 if (!request_region(s->io, pci_resource_len(pcidev,0),
1905 VRC5477_AC97_MODULE_NAME)) {
1906 printk(KERN_ERR PFX "io ports %#lx->%#lx in use\n",
1907 s->io, s->io + pci_resource_len(pcidev,0)-1);
1908 goto err_region;
1909 }
1910 if (request_irq(s->irq, vrc5477_ac97_interrupt, SA_INTERRUPT,
1911 VRC5477_AC97_MODULE_NAME, s)) {
1912 printk(KERN_ERR PFX "irq %u in use\n", s->irq);
1913 goto err_irq;
1914 }
1915
1916 printk(KERN_INFO PFX "IO at %#lx, IRQ %d\n", s->io, s->irq);
1917
1918 /* register devices */
1919 if ((s->dev_audio = register_sound_dsp(&vrc5477_ac97_audio_fops, -1)) < 0)
1920 goto err_dev1;
1921 if ((s->codec->dev_mixer =
1922 register_sound_mixer(&vrc5477_ac97_mixer_fops, -1)) < 0)
1923 goto err_dev2;
1924
1925 #ifdef VRC5477_AC97_DEBUG
1926 /* initialize the debug proc device */
1927 s->ps = create_proc_read_entry(VRC5477_AC97_MODULE_NAME, 0, NULL,
1928 proc_vrc5477_ac97_dump, NULL);
1929 #endif /* VRC5477_AC97_DEBUG */
1930
1931 /* enable pci io and bus mastering */
1932 if (pci_enable_device(pcidev))
1933 goto err_dev3;
1934 pci_set_master(pcidev);
1935
1936 /* cold reset the AC97 */
1937 outl(VRC5477_ACLINK_CTRL_RST_ON | VRC5477_ACLINK_CTRL_RST_TIME,
1938 s->io + VRC5477_ACLINK_CTRL);
1939 while (inl(s->io + VRC5477_ACLINK_CTRL) & VRC5477_ACLINK_CTRL_RST_ON);
1940
1941 /* codec init */
1942 if (!ac97_probe_codec(s->codec))
1943 goto err_dev3;
1944
1945 #ifdef VRC5477_AC97_DEBUG
1946 sprintf(proc_str, "driver/%s/%d/ac97",
1947 VRC5477_AC97_MODULE_NAME, s->codec->id);
1948 s->ac97_ps = create_proc_read_entry (proc_str, 0, NULL,
1949 ac97_read_proc, s->codec);
1950 /* TODO : why this proc file does not show up? */
1951 #endif
1952
1953 /* Try to enable variable rate audio mode. */
1954 wrcodec(s->codec, AC97_EXTENDED_STATUS,
1955 rdcodec(s->codec, AC97_EXTENDED_STATUS) | AC97_EXTSTAT_VRA);
1956 /* Did we enable it? */
1957 if(rdcodec(s->codec, AC97_EXTENDED_STATUS) & AC97_EXTSTAT_VRA)
1958 s->extended_status |= AC97_EXTSTAT_VRA;
1959 else {
1960 s->dacRate = 48000;
1961 printk(KERN_INFO PFX "VRA mode not enabled; rate fixed at %d.",
1962 s->dacRate);
1963 }
1964
1965 /* let us get the default volumne louder */
1966 wrcodec(s->codec, 0x2, 0x1010); /* master volume, middle */
1967 wrcodec(s->codec, 0xc, 0x10); /* phone volume, middle */
1968 // wrcodec(s->codec, 0xe, 0x10); /* misc volume, middle */
1969 wrcodec(s->codec, 0x10, 0x8000); /* line-in 2 line-out disable */
1970 wrcodec(s->codec, 0x18, 0x0707); /* PCM out (line out) middle */
1971
1972
1973 /* by default we select line in the input */
1974 wrcodec(s->codec, 0x1a, 0x0404);
1975 wrcodec(s->codec, 0x1c, 0x0f0f);
1976 wrcodec(s->codec, 0x1e, 0x07);
1977
1978 /* enable the master interrupt but disable all others */
1979 outl(VRC5477_INT_MASK_NMASK, s->io + VRC5477_INT_MASK);
1980
1981 /* store it in the driver field */
1982 pci_set_drvdata(pcidev, s);
1983 pcidev->dma_mask = 0xffffffff;
1984 /* put it into driver list */
1985 list_add_tail(&s->devs, &devs);
1986 /* increment devindex */
1987 if (devindex < NR_DEVICE-1)
1988 devindex++;
1989 return 0;
1990
1991 err_dev3:
1992 unregister_sound_mixer(s->codec->dev_mixer);
1993 err_dev2:
1994 unregister_sound_dsp(s->dev_audio);
1995 err_dev1:
1996 printk(KERN_ERR PFX "cannot register misc device\n");
1997 free_irq(s->irq, s);
1998 err_irq:
1999 release_region(s->io, pci_resource_len(pcidev,0));
2000 err_region:
2001 ac97_release_codec(codec);
2002 kfree(s);
2003 return -1;
2004 }
2005
2006 static void __devexit vrc5477_ac97_remove(struct pci_dev *dev)
2007 {
2008 struct vrc5477_ac97_state *s = pci_get_drvdata(dev);
2009
2010 if (!s)
2011 return;
2012 list_del(&s->devs);
2013
2014 #ifdef VRC5477_AC97_DEBUG
2015 if (s->ps)
2016 remove_proc_entry(VRC5477_AC97_MODULE_NAME, NULL);
2017 #endif /* VRC5477_AC97_DEBUG */
2018
2019 synchronize_irq();
2020 free_irq(s->irq, s);
2021 release_region(s->io, pci_resource_len(dev,0));
2022 unregister_sound_dsp(s->dev_audio);
2023 unregister_sound_mixer(s->codec->dev_mixer);
2024 ac97_release_codec(s->codec);
2025 kfree(s);
2026 pci_set_drvdata(dev, NULL);
2027 }
2028
2029
2030 static struct pci_device_id id_table[] = {
2031 { PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_VRC5477_AC97,
2032 PCI_ANY_ID, PCI_ANY_ID, 0, 0 },
2033 { 0, }
2034 };
2035
2036 MODULE_DEVICE_TABLE(pci, id_table);
2037
2038 static struct pci_driver vrc5477_ac97_driver = {
2039 .name = VRC5477_AC97_MODULE_NAME,
2040 .id_table = id_table,
2041 .probe = vrc5477_ac97_probe,
2042 .remove = __devexit_p(vrc5477_ac97_remove)
2043 };
2044
2045 static int __init init_vrc5477_ac97(void)
2046 {
2047 printk("Vrc5477 AC97 driver: version v0.2 time " __TIME__ " " __DATE__ " by Jun Sun\n");
2048 return pci_module_init(&vrc5477_ac97_driver);
2049 }
2050
2051 static void __exit cleanup_vrc5477_ac97(void)
2052 {
2053 printk(KERN_INFO PFX "unloading\n");
2054 pci_unregister_driver(&vrc5477_ac97_driver);
2055 }
2056
2057 module_init(init_vrc5477_ac97);
2058 module_exit(cleanup_vrc5477_ac97);
2059
Linux with added FPC-III support