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hilkbd: Kill compiler warning and fix comment dyslexia
[wrt350n-kernel.git] / sound / oss / nec_vrc5477.c
blob27b4ba3aaa7cc78746c3469ce95f5894afb62bcc
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 <linux/mutex.h>
82
83 #include <asm/io.h>
84 #include <asm/dma.h>
85 #include <asm/uaccess.h>
86
87 /* -------------------debug macros -------------------------------------- */
88 /* #undef VRC5477_AC97_DEBUG */
89 #define VRC5477_AC97_DEBUG
90
91 #undef VRC5477_AC97_VERBOSE_DEBUG
92 /* #define VRC5477_AC97_VERBOSE_DEBUG */
93
94 #if defined(VRC5477_AC97_VERBOSE_DEBUG)
95 #define VRC5477_AC97_DEBUG
96 #endif
97
98 #if defined(VRC5477_AC97_DEBUG)
99 #define ASSERT(x) if (!(x)) { \
100 panic("assertion failed at %s:%d: %s\n", __FILE__, __LINE__, #x); }
101 #else
102 #define ASSERT(x)
103 #endif /* VRC5477_AC97_DEBUG */
104
105 #if defined(VRC5477_AC97_VERBOSE_DEBUG)
106 static u16 inTicket; /* check sync between intr & write */
107 static u16 outTicket;
108 #endif
109
110 /* --------------------------------------------------------------------- */
111
112 #undef OSS_DOCUMENTED_MIXER_SEMANTICS
113
114 static const unsigned sample_shift[] = { 0, 1, 1, 2 };
115
116 #define VRC5477_INT_CLR 0x0
117 #define VRC5477_INT_STATUS 0x0
118 #define VRC5477_CODEC_WR 0x4
119 #define VRC5477_CODEC_RD 0x8
120 #define VRC5477_CTRL 0x18
121 #define VRC5477_ACLINK_CTRL 0x1c
122 #define VRC5477_INT_MASK 0x24
123
124 #define VRC5477_DAC1_CTRL 0x30
125 #define VRC5477_DAC1L 0x34
126 #define VRC5477_DAC1_BADDR 0x38
127 #define VRC5477_DAC2_CTRL 0x3c
128 #define VRC5477_DAC2L 0x40
129 #define VRC5477_DAC2_BADDR 0x44
130 #define VRC5477_DAC3_CTRL 0x48
131 #define VRC5477_DAC3L 0x4c
132 #define VRC5477_DAC3_BADDR 0x50
133
134 #define VRC5477_ADC1_CTRL 0x54
135 #define VRC5477_ADC1L 0x58
136 #define VRC5477_ADC1_BADDR 0x5c
137 #define VRC5477_ADC2_CTRL 0x60
138 #define VRC5477_ADC2L 0x64
139 #define VRC5477_ADC2_BADDR 0x68
140 #define VRC5477_ADC3_CTRL 0x6c
141 #define VRC5477_ADC3L 0x70
142 #define VRC5477_ADC3_BADDR 0x74
143
144 #define VRC5477_CODEC_WR_RWC (1 << 23)
145
146 #define VRC5477_CODEC_RD_RRDYA (1 << 31)
147 #define VRC5477_CODEC_RD_RRDYD (1 << 30)
148
149 #define VRC5477_ACLINK_CTRL_RST_ON (1 << 15)
150 #define VRC5477_ACLINK_CTRL_RST_TIME 0x7f
151 #define VRC5477_ACLINK_CTRL_SYNC_ON (1 << 30)
152 #define VRC5477_ACLINK_CTRL_CK_STOP_ON (1 << 31)
153
154 #define VRC5477_CTRL_DAC2ENB (1 << 15)
155 #define VRC5477_CTRL_ADC2ENB (1 << 14)
156 #define VRC5477_CTRL_DAC1ENB (1 << 13)
157 #define VRC5477_CTRL_ADC1ENB (1 << 12)
158
159 #define VRC5477_INT_MASK_NMASK (1 << 31)
160 #define VRC5477_INT_MASK_DAC1END (1 << 5)
161 #define VRC5477_INT_MASK_DAC2END (1 << 4)
162 #define VRC5477_INT_MASK_DAC3END (1 << 3)
163 #define VRC5477_INT_MASK_ADC1END (1 << 2)
164 #define VRC5477_INT_MASK_ADC2END (1 << 1)
165 #define VRC5477_INT_MASK_ADC3END (1 << 0)
166
167 #define VRC5477_DMA_ACTIVATION (1 << 31)
168 #define VRC5477_DMA_WIP (1 << 30)
169
170
171 #define VRC5477_AC97_MODULE_NAME "NEC_Vrc5477_audio"
172 #define PFX VRC5477_AC97_MODULE_NAME ": "
173
174 /* --------------------------------------------------------------------- */
175
176 struct vrc5477_ac97_state {
177 /* list of vrc5477_ac97 devices */
178 struct list_head devs;
179
180 /* the corresponding pci_dev structure */
181 struct pci_dev *dev;
182
183 /* soundcore stuff */
184 int dev_audio;
185
186 /* hardware resources */
187 unsigned long io;
188 unsigned int irq;
189
190 #ifdef VRC5477_AC97_DEBUG
191 /* debug /proc entry */
192 struct proc_dir_entry *ps;
193 struct proc_dir_entry *ac97_ps;
194 #endif /* VRC5477_AC97_DEBUG */
195
196 struct ac97_codec *codec;
197
198 unsigned dacChannels, adcChannels;
199 unsigned short dacRate, adcRate;
200 unsigned short extended_status;
201
202 spinlock_t lock;
203 struct mutex open_mutex;
204 mode_t open_mode;
205 wait_queue_head_t open_wait;
206
207 struct dmabuf {
208 void *lbuf, *rbuf;
209 dma_addr_t lbufDma, rbufDma;
210 unsigned bufOrder;
211 unsigned numFrag;
212 unsigned fragShift;
213 unsigned fragSize; /* redundant */
214 unsigned fragTotalSize; /* = numFrag * fragSize(real) */
215 unsigned nextIn;
216 unsigned nextOut;
217 int count;
218 unsigned error; /* over/underrun */
219 wait_queue_head_t wait;
220 /* OSS stuff */
221 unsigned stopped:1;
222 unsigned ready:1;
223 } dma_dac, dma_adc;
224
225 #define WORK_BUF_SIZE 2048
226 struct {
227 u16 lchannel;
228 u16 rchannel;
229 } workBuf[WORK_BUF_SIZE/4];
230 };
231
232 /* --------------------------------------------------------------------- */
233
234 static LIST_HEAD(devs);
235
236 /* --------------------------------------------------------------------- */
237
238 static inline unsigned ld2(unsigned int x)
239 {
240 unsigned r = 0;
241
242 if (x >= 0x10000) {
243 x >>= 16;
244 r += 16;
245 }
246 if (x >= 0x100) {
247 x >>= 8;
248 r += 8;
249 }
250 if (x >= 0x10) {
251 x >>= 4;
252 r += 4;
253 }
254 if (x >= 4) {
255 x >>= 2;
256 r += 2;
257 }
258 if (x >= 2)
259 r++;
260 return r;
261 }
262
263 /* --------------------------------------------------------------------- */
264
265 static u16 rdcodec(struct ac97_codec *codec, u8 addr)
266 {
267 struct vrc5477_ac97_state *s =
268 (struct vrc5477_ac97_state *)codec->private_data;
269 unsigned long flags;
270 u32 result;
271
272 spin_lock_irqsave(&s->lock, flags);
273
274 /* wait until we can access codec registers */
275 while (inl(s->io + VRC5477_CODEC_WR) & 0x80000000);
276
277 /* write the address and "read" command to codec */
278 addr = addr & 0x7f;
279 outl((addr << 16) | VRC5477_CODEC_WR_RWC, s->io + VRC5477_CODEC_WR);
280
281 /* get the return result */
282 udelay(100); /* workaround hardware bug */
283 while ( (result = inl(s->io + VRC5477_CODEC_RD)) &
284 (VRC5477_CODEC_RD_RRDYA | VRC5477_CODEC_RD_RRDYD) ) {
285 /* we get either addr or data, or both */
286 if (result & VRC5477_CODEC_RD_RRDYA) {
287 ASSERT(addr == ((result >> 16) & 0x7f) );
288 }
289 if (result & VRC5477_CODEC_RD_RRDYD) {
290 break;
291 }
292 }
293
294 spin_unlock_irqrestore(&s->lock, flags);
295
296 return result & 0xffff;
297 }
298
299
300 static void wrcodec(struct ac97_codec *codec, u8 addr, u16 data)
301 {
302 struct vrc5477_ac97_state *s =
303 (struct vrc5477_ac97_state *)codec->private_data;
304 unsigned long flags;
305
306 spin_lock_irqsave(&s->lock, flags);
307
308 /* wait until we can access codec registers */
309 while (inl(s->io + VRC5477_CODEC_WR) & 0x80000000);
310
311 /* write the address and value to codec */
312 outl((addr << 16) | data, s->io + VRC5477_CODEC_WR);
313
314 spin_unlock_irqrestore(&s->lock, flags);
315 }
316
317
318 static void waitcodec(struct ac97_codec *codec)
319 {
320 struct vrc5477_ac97_state *s =
321 (struct vrc5477_ac97_state *)codec->private_data;
322
323 /* wait until we can access codec registers */
324 while (inl(s->io + VRC5477_CODEC_WR) & 0x80000000);
325 }
326
327 static int ac97_codec_not_present(struct ac97_codec *codec)
328 {
329 struct vrc5477_ac97_state *s =
330 (struct vrc5477_ac97_state *)codec->private_data;
331 unsigned long flags;
332 unsigned short count = 0xffff;
333
334 spin_lock_irqsave(&s->lock, flags);
335
336 /* wait until we can access codec registers */
337 do {
338 if (!(inl(s->io + VRC5477_CODEC_WR) & 0x80000000))
339 break;
340 } while (--count);
341
342 if (count == 0) {
343 spin_unlock_irqrestore(&s->lock, flags);
344 return -1;
345 }
346
347 /* write 0 to reset */
348 outl((AC97_RESET << 16) | 0, s->io + VRC5477_CODEC_WR);
349
350 /* test whether we get a response from ac97 chip */
351 count = 0xffff;
352 do {
353 if (!(inl(s->io + VRC5477_CODEC_WR) & 0x80000000))
354 break;
355 } while (--count);
356
357 if (count == 0) {
358 spin_unlock_irqrestore(&s->lock, flags);
359 return -1;
360 }
361 spin_unlock_irqrestore(&s->lock, flags);
362 return 0;
363 }
364
365 /* --------------------------------------------------------------------- */
366
367 static void vrc5477_ac97_delay(int msec)
368 {
369 unsigned long tmo;
370 signed long tmo2;
371
372 if (in_interrupt())
373 return;
374
375 tmo = jiffies + (msec*HZ)/1000;
376 for (;;) {
377 tmo2 = tmo - jiffies;
378 if (tmo2 <= 0)
379 break;
380 schedule_timeout(tmo2);
381 }
382 }
383
384
385 static void set_adc_rate(struct vrc5477_ac97_state *s, unsigned rate)
386 {
387 wrcodec(s->codec, AC97_PCM_LR_ADC_RATE, rate);
388 s->adcRate = rate;
389 }
390
391
392 static void set_dac_rate(struct vrc5477_ac97_state *s, unsigned rate)
393 {
394 if(s->extended_status & AC97_EXTSTAT_VRA) {
395 wrcodec(s->codec, AC97_PCM_FRONT_DAC_RATE, rate);
396 s->dacRate = rdcodec(s->codec, AC97_PCM_FRONT_DAC_RATE);
397 }
398 }
399
400 static int ac97_codec_not_present(struct ac97_codec *codec)
401 {
402 struct vrc5477_ac97_state *s =
403 (struct vrc5477_ac97_state *)codec->private_data;
404 unsigned long flags;
405 unsigned short count = 0xffff;
406
407 spin_lock_irqsave(&s->lock, flags);
408
409 /* wait until we can access codec registers */
410 do {
411 if (!(inl(s->io + VRC5477_CODEC_WR) & 0x80000000))
412 break;
413 } while (--count);
414
415 if (count == 0) {
416 spin_unlock_irqrestore(&s->lock, flags);
417 return -1;
418 }
419
420 /* write 0 to reset */
421 outl((AC97_RESET << 16) | 0, s->io + VRC5477_CODEC_WR);
422
423 /* test whether we get a response from ac97 chip */
424 count = 0xffff;
425 do {
426 if (!(inl(s->io + VRC5477_CODEC_WR) & 0x80000000))
427 break;
428 } while (--count);
429
430 if (count == 0) {
431 spin_unlock_irqrestore(&s->lock, flags);
432 return -1;
433 }
434 spin_unlock_irqrestore(&s->lock, flags);
435 return 0;
436 }
437
438 /* --------------------------------------------------------------------- */
439
440 static inline void
441 stop_dac(struct vrc5477_ac97_state *s)
442 {
443 struct dmabuf* db = &s->dma_dac;
444 unsigned long flags;
445 u32 temp;
446
447 spin_lock_irqsave(&s->lock, flags);
448
449 if (db->stopped) {
450 spin_unlock_irqrestore(&s->lock, flags);
451 return;
452 }
453
454 /* deactivate the dma */
455 outl(0, s->io + VRC5477_DAC1_CTRL);
456 outl(0, s->io + VRC5477_DAC2_CTRL);
457
458 /* wait for DAM completely stop */
459 while (inl(s->io + VRC5477_DAC1_CTRL) & VRC5477_DMA_WIP);
460 while (inl(s->io + VRC5477_DAC2_CTRL) & VRC5477_DMA_WIP);
461
462 /* disable dac slots in aclink */
463 temp = inl(s->io + VRC5477_CTRL);
464 temp &= ~ (VRC5477_CTRL_DAC1ENB | VRC5477_CTRL_DAC2ENB);
465 outl (temp, s->io + VRC5477_CTRL);
466
467 /* disable interrupts */
468 temp = inl(s->io + VRC5477_INT_MASK);
469 temp &= ~ (VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END);
470 outl (temp, s->io + VRC5477_INT_MASK);
471
472 /* clear pending ones */
473 outl(VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END,
474 s->io + VRC5477_INT_CLR);
475
476 db->stopped = 1;
477
478 spin_unlock_irqrestore(&s->lock, flags);
479 }
480
481 static void start_dac(struct vrc5477_ac97_state *s)
482 {
483 struct dmabuf* db = &s->dma_dac;
484 unsigned long flags;
485 u32 dmaLength;
486 u32 temp;
487
488 spin_lock_irqsave(&s->lock, flags);
489
490 if (!db->stopped) {
491 spin_unlock_irqrestore(&s->lock, flags);
492 return;
493 }
494
495 /* we should have some data to do the DMA trasnfer */
496 ASSERT(db->count >= db->fragSize);
497
498 /* clear pending fales interrupts */
499 outl(VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END,
500 s->io + VRC5477_INT_CLR);
501
502 /* enable interrupts */
503 temp = inl(s->io + VRC5477_INT_MASK);
504 temp |= VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END;
505 outl(temp, s->io + VRC5477_INT_MASK);
506
507 /* setup dma base addr */
508 outl(db->lbufDma + db->nextOut, s->io + VRC5477_DAC1_BADDR);
509 if (s->dacChannels == 1) {
510 outl(db->lbufDma + db->nextOut, s->io + VRC5477_DAC2_BADDR);
511 } else {
512 outl(db->rbufDma + db->nextOut, s->io + VRC5477_DAC2_BADDR);
513 }
514
515 /* set dma length, in the unit of 0x10 bytes */
516 dmaLength = db->fragSize >> 4;
517 outl(dmaLength, s->io + VRC5477_DAC1L);
518 outl(dmaLength, s->io + VRC5477_DAC2L);
519
520 /* activate dma */
521 outl(VRC5477_DMA_ACTIVATION, s->io + VRC5477_DAC1_CTRL);
522 outl(VRC5477_DMA_ACTIVATION, s->io + VRC5477_DAC2_CTRL);
523
524 /* enable dac slots - we should hear the music now! */
525 temp = inl(s->io + VRC5477_CTRL);
526 temp |= (VRC5477_CTRL_DAC1ENB | VRC5477_CTRL_DAC2ENB);
527 outl (temp, s->io + VRC5477_CTRL);
528
529 /* it is time to setup next dma transfer */
530 ASSERT(inl(s->io + VRC5477_DAC1_CTRL) & VRC5477_DMA_WIP);
531 ASSERT(inl(s->io + VRC5477_DAC2_CTRL) & VRC5477_DMA_WIP);
532
533 temp = db->nextOut + db->fragSize;
534 if (temp >= db->fragTotalSize) {
535 ASSERT(temp == db->fragTotalSize);
536 temp = 0;
537 }
538
539 outl(db->lbufDma + temp, s->io + VRC5477_DAC1_BADDR);
540 if (s->dacChannels == 1) {
541 outl(db->lbufDma + temp, s->io + VRC5477_DAC2_BADDR);
542 } else {
543 outl(db->rbufDma + temp, s->io + VRC5477_DAC2_BADDR);
544 }
545
546 db->stopped = 0;
547
548 #if defined(VRC5477_AC97_VERBOSE_DEBUG)
549 outTicket = *(u16*)(db->lbuf+db->nextOut);
550 if (db->count > db->fragSize) {
551 ASSERT((u16)(outTicket+1) == *(u16*)(db->lbuf+temp));
552 }
553 #endif
554
555 spin_unlock_irqrestore(&s->lock, flags);
556 }
557
558 static inline void stop_adc(struct vrc5477_ac97_state *s)
559 {
560 struct dmabuf* db = &s->dma_adc;
561 unsigned long flags;
562 u32 temp;
563
564 spin_lock_irqsave(&s->lock, flags);
565
566 if (db->stopped) {
567 spin_unlock_irqrestore(&s->lock, flags);
568 return;
569 }
570
571 /* deactivate the dma */
572 outl(0, s->io + VRC5477_ADC1_CTRL);
573 outl(0, s->io + VRC5477_ADC2_CTRL);
574
575 /* disable adc slots in aclink */
576 temp = inl(s->io + VRC5477_CTRL);
577 temp &= ~ (VRC5477_CTRL_ADC1ENB | VRC5477_CTRL_ADC2ENB);
578 outl (temp, s->io + VRC5477_CTRL);
579
580 /* disable interrupts */
581 temp = inl(s->io + VRC5477_INT_MASK);
582 temp &= ~ (VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END);
583 outl (temp, s->io + VRC5477_INT_MASK);
584
585 /* clear pending ones */
586 outl(VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END,
587 s->io + VRC5477_INT_CLR);
588
589 db->stopped = 1;
590
591 spin_unlock_irqrestore(&s->lock, flags);
592 }
593
594 static void start_adc(struct vrc5477_ac97_state *s)
595 {
596 struct dmabuf* db = &s->dma_adc;
597 unsigned long flags;
598 u32 dmaLength;
599 u32 temp;
600
601 spin_lock_irqsave(&s->lock, flags);
602
603 if (!db->stopped) {
604 spin_unlock_irqrestore(&s->lock, flags);
605 return;
606 }
607
608 /* we should at least have some free space in the buffer */
609 ASSERT(db->count < db->fragTotalSize - db->fragSize * 2);
610
611 /* clear pending ones */
612 outl(VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END,
613 s->io + VRC5477_INT_CLR);
614
615 /* enable interrupts */
616 temp = inl(s->io + VRC5477_INT_MASK);
617 temp |= VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END;
618 outl(temp, s->io + VRC5477_INT_MASK);
619
620 /* setup dma base addr */
621 outl(db->lbufDma + db->nextIn, s->io + VRC5477_ADC1_BADDR);
622 outl(db->rbufDma + db->nextIn, s->io + VRC5477_ADC2_BADDR);
623
624 /* setup dma length */
625 dmaLength = db->fragSize >> 4;
626 outl(dmaLength, s->io + VRC5477_ADC1L);
627 outl(dmaLength, s->io + VRC5477_ADC2L);
628
629 /* activate dma */
630 outl(VRC5477_DMA_ACTIVATION, s->io + VRC5477_ADC1_CTRL);
631 outl(VRC5477_DMA_ACTIVATION, s->io + VRC5477_ADC2_CTRL);
632
633 /* enable adc slots */
634 temp = inl(s->io + VRC5477_CTRL);
635 temp |= (VRC5477_CTRL_ADC1ENB | VRC5477_CTRL_ADC2ENB);
636 outl (temp, s->io + VRC5477_CTRL);
637
638 /* it is time to setup next dma transfer */
639 temp = db->nextIn + db->fragSize;
640 if (temp >= db->fragTotalSize) {
641 ASSERT(temp == db->fragTotalSize);
642 temp = 0;
643 }
644 outl(db->lbufDma + temp, s->io + VRC5477_ADC1_BADDR);
645 outl(db->rbufDma + temp, s->io + VRC5477_ADC2_BADDR);
646
647 db->stopped = 0;
648
649 spin_unlock_irqrestore(&s->lock, flags);
650 }
651
652 /* --------------------------------------------------------------------- */
653
654 #define DMABUF_DEFAULTORDER (16-PAGE_SHIFT)
655 #define DMABUF_MINORDER 1
656
657 static inline void dealloc_dmabuf(struct vrc5477_ac97_state *s,
658 struct dmabuf *db)
659 {
660 if (db->lbuf) {
661 ASSERT(db->rbuf);
662 pci_free_consistent(s->dev, PAGE_SIZE << db->bufOrder,
663 db->lbuf, db->lbufDma);
664 pci_free_consistent(s->dev, PAGE_SIZE << db->bufOrder,
665 db->rbuf, db->rbufDma);
666 db->lbuf = db->rbuf = NULL;
667 }
668 db->nextIn = db->nextOut = 0;
669 db->ready = 0;
670 }
671
672 static int prog_dmabuf(struct vrc5477_ac97_state *s,
673 struct dmabuf *db,
674 unsigned rate)
675 {
676 int order;
677 unsigned bufsize;
678
679 if (!db->lbuf) {
680 ASSERT(!db->rbuf);
681
682 db->ready = 0;
683 for (order = DMABUF_DEFAULTORDER;
684 order >= DMABUF_MINORDER;
685 order--) {
686 db->lbuf = pci_alloc_consistent(s->dev,
687 PAGE_SIZE << order,
688 &db->lbufDma);
689 db->rbuf = pci_alloc_consistent(s->dev,
690 PAGE_SIZE << order,
691 &db->rbufDma);
692 if (db->lbuf && db->rbuf) break;
693 if (db->lbuf) {
694 ASSERT(!db->rbuf);
695 pci_free_consistent(s->dev,
696 PAGE_SIZE << order,
697 db->lbuf,
698 db->lbufDma);
699 }
700 }
701 if (!db->lbuf) {
702 ASSERT(!db->rbuf);
703 return -ENOMEM;
704 }
705
706 db->bufOrder = order;
707 }
708
709 db->count = 0;
710 db->nextIn = db->nextOut = 0;
711
712 bufsize = PAGE_SIZE << db->bufOrder;
713 db->fragShift = ld2(rate * 2 / 100);
714 if (db->fragShift < 4) db->fragShift = 4;
715
716 db->numFrag = bufsize >> db->fragShift;
717 while (db->numFrag < 4 && db->fragShift > 4) {
718 db->fragShift--;
719 db->numFrag = bufsize >> db->fragShift;
720 }
721 db->fragSize = 1 << db->fragShift;
722 db->fragTotalSize = db->numFrag << db->fragShift;
723 memset(db->lbuf, 0, db->fragTotalSize);
724 memset(db->rbuf, 0, db->fragTotalSize);
725
726 db->ready = 1;
727
728 return 0;
729 }
730
731 static inline int prog_dmabuf_adc(struct vrc5477_ac97_state *s)
732 {
733 stop_adc(s);
734 return prog_dmabuf(s, &s->dma_adc, s->adcRate);
735 }
736
737 static inline int prog_dmabuf_dac(struct vrc5477_ac97_state *s)
738 {
739 stop_dac(s);
740 return prog_dmabuf(s, &s->dma_dac, s->dacRate);
741 }
742
743
744 /* --------------------------------------------------------------------- */
745 /* hold spinlock for the following! */
746
747 static inline void vrc5477_ac97_adc_interrupt(struct vrc5477_ac97_state *s)
748 {
749 struct dmabuf* adc = &s->dma_adc;
750 unsigned temp;
751
752 /* we need two frags avaiable because one is already being used
753 * and the other will be used when next interrupt happens.
754 */
755 if (adc->count >= adc->fragTotalSize - adc->fragSize) {
756 stop_adc(s);
757 adc->error++;
758 printk(KERN_INFO PFX "adc overrun\n");
759 return;
760 }
761
762 /* set the base addr for next DMA transfer */
763 temp = adc->nextIn + 2*adc->fragSize;
764 if (temp >= adc->fragTotalSize) {
765 ASSERT( (temp == adc->fragTotalSize) ||
766 (temp == adc->fragTotalSize + adc->fragSize) );
767 temp -= adc->fragTotalSize;
768 }
769 outl(adc->lbufDma + temp, s->io + VRC5477_ADC1_BADDR);
770 outl(adc->rbufDma + temp, s->io + VRC5477_ADC2_BADDR);
771
772 /* adjust nextIn */
773 adc->nextIn += adc->fragSize;
774 if (adc->nextIn >= adc->fragTotalSize) {
775 ASSERT(adc->nextIn == adc->fragTotalSize);
776 adc->nextIn = 0;
777 }
778
779 /* adjust count */
780 adc->count += adc->fragSize;
781
782 /* wake up anybody listening */
783 if (waitqueue_active(&adc->wait)) {
784 wake_up_interruptible(&adc->wait);
785 }
786 }
787
788 static inline void vrc5477_ac97_dac_interrupt(struct vrc5477_ac97_state *s)
789 {
790 struct dmabuf* dac = &s->dma_dac;
791 unsigned temp;
792
793 /* next DMA transfer should already started */
794 // ASSERT(inl(s->io + VRC5477_DAC1_CTRL) & VRC5477_DMA_WIP);
795 // ASSERT(inl(s->io + VRC5477_DAC2_CTRL) & VRC5477_DMA_WIP);
796
797 /* let us set for next next DMA transfer */
798 temp = dac->nextOut + dac->fragSize*2;
799 if (temp >= dac->fragTotalSize) {
800 ASSERT( (temp == dac->fragTotalSize) ||
801 (temp == dac->fragTotalSize + dac->fragSize) );
802 temp -= dac->fragTotalSize;
803 }
804 outl(dac->lbufDma + temp, s->io + VRC5477_DAC1_BADDR);
805 if (s->dacChannels == 1) {
806 outl(dac->lbufDma + temp, s->io + VRC5477_DAC2_BADDR);
807 } else {
808 outl(dac->rbufDma + temp, s->io + VRC5477_DAC2_BADDR);
809 }
810
811 #if defined(VRC5477_AC97_VERBOSE_DEBUG)
812 if (*(u16*)(dac->lbuf + dac->nextOut) != outTicket) {
813 printk("assert fail: - %d vs %d\n",
814 *(u16*)(dac->lbuf + dac->nextOut),
815 outTicket);
816 ASSERT(1 == 0);
817 }
818 #endif
819
820 /* adjust nextOut pointer */
821 dac->nextOut += dac->fragSize;
822 if (dac->nextOut >= dac->fragTotalSize) {
823 ASSERT(dac->nextOut == dac->fragTotalSize);
824 dac->nextOut = 0;
825 }
826
827 /* adjust count */
828 dac->count -= dac->fragSize;
829 if (dac->count <=0 ) {
830 /* buffer under run */
831 dac->count = 0;
832 dac->nextIn = dac->nextOut;
833 stop_dac(s);
834 }
835
836 #if defined(VRC5477_AC97_VERBOSE_DEBUG)
837 if (dac->count) {
838 outTicket ++;
839 ASSERT(*(u16*)(dac->lbuf + dac->nextOut) == outTicket);
840 }
841 #endif
842
843 /* we cannot have both under run and someone is waiting on us */
844 ASSERT(! (waitqueue_active(&dac->wait) && (dac->count <= 0)) );
845
846 /* wake up anybody listening */
847 if (waitqueue_active(&dac->wait))
848 wake_up_interruptible(&dac->wait);
849 }
850
851 static irqreturn_t vrc5477_ac97_interrupt(int irq, void *dev_id)
852 {
853 struct vrc5477_ac97_state *s = (struct vrc5477_ac97_state *)dev_id;
854 u32 irqStatus;
855 u32 adcInterrupts, dacInterrupts;
856
857 spin_lock(&s->lock);
858
859 /* get irqStatus and clear the detected ones */
860 irqStatus = inl(s->io + VRC5477_INT_STATUS);
861 outl(irqStatus, s->io + VRC5477_INT_CLR);
862
863 /* let us see what we get */
864 dacInterrupts = VRC5477_INT_MASK_DAC1END | VRC5477_INT_MASK_DAC2END;
865 adcInterrupts = VRC5477_INT_MASK_ADC1END | VRC5477_INT_MASK_ADC2END;
866 if (irqStatus & dacInterrupts) {
867 /* we should get both interrupts, but just in case ... */
868 if (irqStatus & VRC5477_INT_MASK_DAC1END) {
869 vrc5477_ac97_dac_interrupt(s);
870 }
871 if ( (irqStatus & dacInterrupts) != dacInterrupts ) {
872 printk(KERN_WARNING "vrc5477_ac97 : dac interrupts not in sync!!!\n");
873 stop_dac(s);
874 start_dac(s);
875 }
876 } else if (irqStatus & adcInterrupts) {
877 /* we should get both interrupts, but just in case ... */
878 if(irqStatus & VRC5477_INT_MASK_ADC1END) {
879 vrc5477_ac97_adc_interrupt(s);
880 }
881 if ( (irqStatus & adcInterrupts) != adcInterrupts ) {
882 printk(KERN_WARNING "vrc5477_ac97 : adc interrupts not in sync!!!\n");
883 stop_adc(s);
884 start_adc(s);
885 }
886 }
887
888 spin_unlock(&s->lock);
889 return IRQ_HANDLED;
890 }
891
892 /* --------------------------------------------------------------------- */
893
894 static int vrc5477_ac97_open_mixdev(struct inode *inode, struct file *file)
895 {
896 int minor = iminor(inode);
897 struct list_head *list;
898 struct vrc5477_ac97_state *s;
899
900 for (list = devs.next; ; list = list->next) {
901 if (list == &devs)
902 return -ENODEV;
903 s = list_entry(list, struct vrc5477_ac97_state, devs);
904 if (s->codec->dev_mixer == minor)
905 break;
906 }
907 file->private_data = s;
908 return nonseekable_open(inode, file);
909 }
910
911 static int vrc5477_ac97_release_mixdev(struct inode *inode, struct file *file)
912 {
913 return 0;
914 }
915
916
917 static int mixdev_ioctl(struct ac97_codec *codec, unsigned int cmd,
918 unsigned long arg)
919 {
920 return codec->mixer_ioctl(codec, cmd, arg);
921 }
922
923 static int vrc5477_ac97_ioctl_mixdev(struct inode *inode, struct file *file,
924 unsigned int cmd, unsigned long arg)
925 {
926 struct vrc5477_ac97_state *s =
927 (struct vrc5477_ac97_state *)file->private_data;
928 struct ac97_codec *codec = s->codec;
929
930 return mixdev_ioctl(codec, cmd, arg);
931 }
932
933 static /*const*/ struct file_operations vrc5477_ac97_mixer_fops = {
934 .owner = THIS_MODULE,
935 .llseek = no_llseek,
936 .ioctl = vrc5477_ac97_ioctl_mixdev,
937 .open = vrc5477_ac97_open_mixdev,
938 .release = vrc5477_ac97_release_mixdev,
939 };
940
941 /* --------------------------------------------------------------------- */
942
943 static int drain_dac(struct vrc5477_ac97_state *s, int nonblock)
944 {
945 unsigned long flags;
946 int count, tmo;
947
948 if (!s->dma_dac.ready)
949 return 0;
950
951 for (;;) {
952 spin_lock_irqsave(&s->lock, flags);
953 count = s->dma_dac.count;
954 spin_unlock_irqrestore(&s->lock, flags);
955 if (count <= 0)
956 break;
957 if (signal_pending(current))
958 break;
959 if (nonblock)
960 return -EBUSY;
961 tmo = 1000 * count / s->dacRate / 2;
962 vrc5477_ac97_delay(tmo);
963 }
964 if (signal_pending(current))
965 return -ERESTARTSYS;
966 return 0;
967 }
968
969 /* --------------------------------------------------------------------- */
970
971 static inline int
972 copy_two_channel_adc_to_user(struct vrc5477_ac97_state *s,
973 char *buffer,
974 int copyCount)
975 {
976 struct dmabuf *db = &s->dma_adc;
977 int bufStart = db->nextOut;
978 for (; copyCount > 0; ) {
979 int i;
980 int count = copyCount;
981 if (count > WORK_BUF_SIZE/2) count = WORK_BUF_SIZE/2;
982 for (i=0; i< count/2; i++) {
983 s->workBuf[i].lchannel =
984 *(u16*)(db->lbuf + bufStart + i*2);
985 s->workBuf[i].rchannel =
986 *(u16*)(db->rbuf + bufStart + i*2);
987 }
988 if (copy_to_user(buffer, s->workBuf, count*2)) {
989 return -1;
990 }
991
992 copyCount -= count;
993 bufStart += count;
994 ASSERT(bufStart <= db->fragTotalSize);
995 buffer += count *2;
996 }
997 return 0;
998 }
999
1000 /* return the total bytes that is copied */
1001 static inline int
1002 copy_adc_to_user(struct vrc5477_ac97_state *s,
1003 char * buffer,
1004 size_t count,
1005 int avail)
1006 {
1007 struct dmabuf *db = &s->dma_adc;
1008 int copyCount=0;
1009 int copyFragCount=0;
1010 int totalCopyCount = 0;
1011 int totalCopyFragCount = 0;
1012 unsigned long flags;
1013
1014 /* adjust count to signel channel byte count */
1015 count >>= s->adcChannels - 1;
1016
1017 /* we may have to "copy" twice as ring buffer wraps around */
1018 for (; (avail > 0) && (count > 0); ) {
1019 /* determine max possible copy count for single channel */
1020 copyCount = count;
1021 if (copyCount > avail) {
1022 copyCount = avail;
1023 }
1024 if (copyCount + db->nextOut > db->fragTotalSize) {
1025 copyCount = db->fragTotalSize - db->nextOut;
1026 ASSERT((copyCount % db->fragSize) == 0);
1027 }
1028
1029 copyFragCount = (copyCount-1) >> db->fragShift;
1030 copyFragCount = (copyFragCount+1) << db->fragShift;
1031 ASSERT(copyFragCount >= copyCount);
1032
1033 /* we copy differently based on adc channels */
1034 if (s->adcChannels == 1) {
1035 if (copy_to_user(buffer,
1036 db->lbuf + db->nextOut,
1037 copyCount))
1038 return -1;
1039 } else {
1040 /* *sigh* we have to mix two streams into one */
1041 if (copy_two_channel_adc_to_user(s, buffer, copyCount))
1042 return -1;
1043 }
1044
1045 count -= copyCount;
1046 totalCopyCount += copyCount;
1047 avail -= copyFragCount;
1048 totalCopyFragCount += copyFragCount;
1049
1050 buffer += copyCount << (s->adcChannels-1);
1051
1052 db->nextOut += copyFragCount;
1053 if (db->nextOut >= db->fragTotalSize) {
1054 ASSERT(db->nextOut == db->fragTotalSize);
1055 db->nextOut = 0;
1056 }
1057
1058 ASSERT((copyFragCount % db->fragSize) == 0);
1059 ASSERT( (count == 0) || (copyCount == copyFragCount));
1060 }
1061
1062 spin_lock_irqsave(&s->lock, flags);
1063 db->count -= totalCopyFragCount;
1064 spin_unlock_irqrestore(&s->lock, flags);
1065
1066 return totalCopyCount << (s->adcChannels-1);
1067 }
1068
1069 static ssize_t
1070 vrc5477_ac97_read(struct file *file,
1071 char *buffer,
1072 size_t count,
1073 loff_t *ppos)
1074 {
1075 struct vrc5477_ac97_state *s =
1076 (struct vrc5477_ac97_state *)file->private_data;
1077 struct dmabuf *db = &s->dma_adc;
1078 ssize_t ret = 0;
1079 unsigned long flags;
1080 int copyCount;
1081 size_t avail;
1082
1083 if (!access_ok(VERIFY_WRITE, buffer, count))
1084 return -EFAULT;
1085
1086 ASSERT(db->ready);
1087
1088 while (count > 0) {
1089 // wait for samples in capture buffer
1090 do {
1091 spin_lock_irqsave(&s->lock, flags);
1092 if (db->stopped)
1093 start_adc(s);
1094 avail = db->count;
1095 spin_unlock_irqrestore(&s->lock, flags);
1096 if (avail <= 0) {
1097 if (file->f_flags & O_NONBLOCK) {
1098 if (!ret)
1099 ret = -EAGAIN;
1100 return ret;
1101 }
1102 interruptible_sleep_on(&db->wait);
1103 if (signal_pending(current)) {
1104 if (!ret)
1105 ret = -ERESTARTSYS;
1106 return ret;
1107 }
1108 }
1109 } while (avail <= 0);
1110
1111 ASSERT( (avail % db->fragSize) == 0);
1112 copyCount = copy_adc_to_user(s, buffer, count, avail);
1113 if (copyCount <=0 ) {
1114 if (!ret) ret = -EFAULT;
1115 return ret;
1116 }
1117
1118 count -= copyCount;
1119 buffer += copyCount;
1120 ret += copyCount;
1121 } // while (count > 0)
1122
1123 return ret;
1124 }
1125
1126 static inline int
1127 copy_two_channel_dac_from_user(struct vrc5477_ac97_state *s,
1128 const char *buffer,
1129 int copyCount)
1130 {
1131 struct dmabuf *db = &s->dma_dac;
1132 int bufStart = db->nextIn;
1133
1134 ASSERT(db->ready);
1135
1136 for (; copyCount > 0; ) {
1137 int i;
1138 int count = copyCount;
1139 if (count > WORK_BUF_SIZE/2) count = WORK_BUF_SIZE/2;
1140 if (copy_from_user(s->workBuf, buffer, count*2)) {
1141 return -1;
1142 }
1143 for (i=0; i< count/2; i++) {
1144 *(u16*)(db->lbuf + bufStart + i*2) =
1145 s->workBuf[i].lchannel;
1146 *(u16*)(db->rbuf + bufStart + i*2) =
1147 s->workBuf[i].rchannel;
1148 }
1149
1150 copyCount -= count;
1151 bufStart += count;
1152 ASSERT(bufStart <= db->fragTotalSize);
1153 buffer += count *2;
1154 }
1155 return 0;
1156
1157 }
1158
1159 /* return the total bytes that is copied */
1160 static inline int
1161 copy_dac_from_user(struct vrc5477_ac97_state *s,
1162 const char *buffer,
1163 size_t count,
1164 int avail)
1165 {
1166 struct dmabuf *db = &s->dma_dac;
1167 int copyCount=0;
1168 int copyFragCount=0;
1169 int totalCopyCount = 0;
1170 int totalCopyFragCount = 0;
1171 unsigned long flags;
1172 #if defined(VRC5477_AC97_VERBOSE_DEBUG)
1173 int i;
1174 #endif
1175
1176 /* adjust count to signel channel byte count */
1177 count >>= s->dacChannels - 1;
1178
1179 /* we may have to "copy" twice as ring buffer wraps around */
1180 for (; (avail > 0) && (count > 0); ) {
1181 /* determine max possible copy count for single channel */
1182 copyCount = count;
1183 if (copyCount > avail) {
1184 copyCount = avail;
1185 }
1186 if (copyCount + db->nextIn > db->fragTotalSize) {
1187 copyCount = db->fragTotalSize - db->nextIn;
1188 ASSERT(copyCount > 0);
1189 }
1190
1191 copyFragCount = copyCount;
1192 ASSERT(copyFragCount >= copyCount);
1193
1194 /* we copy differently based on the number channels */
1195 if (s->dacChannels == 1) {
1196 if (copy_from_user(db->lbuf + db->nextIn,
1197 buffer,
1198 copyCount))
1199 return -1;
1200 /* fill gaps with 0 */
1201 memset(db->lbuf + db->nextIn + copyCount,
1202 0,
1203 copyFragCount - copyCount);
1204 } else {
1205 /* we have demux the stream into two separate ones */
1206 if (copy_two_channel_dac_from_user(s, buffer, copyCount))
1207 return -1;
1208 /* fill gaps with 0 */
1209 memset(db->lbuf + db->nextIn + copyCount,
1210 0,
1211 copyFragCount - copyCount);
1212 memset(db->rbuf + db->nextIn + copyCount,
1213 0,
1214 copyFragCount - copyCount);
1215 }
1216
1217 #if defined(VRC5477_AC97_VERBOSE_DEBUG)
1218 for (i=0; i< copyFragCount; i+= db->fragSize) {
1219 *(u16*)(db->lbuf + db->nextIn + i) = inTicket ++;
1220 }
1221 #endif
1222
1223 count -= copyCount;
1224 totalCopyCount += copyCount;
1225 avail -= copyFragCount;
1226 totalCopyFragCount += copyFragCount;
1227
1228 buffer += copyCount << (s->dacChannels - 1);
1229
1230 db->nextIn += copyFragCount;
1231 if (db->nextIn >= db->fragTotalSize) {
1232 ASSERT(db->nextIn == db->fragTotalSize);
1233 db->nextIn = 0;
1234 }
1235
1236 ASSERT( (count == 0) || (copyCount == copyFragCount));
1237 }
1238
1239 spin_lock_irqsave(&s->lock, flags);
1240 db->count += totalCopyFragCount;
1241 if (db->stopped) {
1242 start_dac(s);
1243 }
1244
1245 /* nextIn should not be equal to nextOut unless we are full */
1246 ASSERT( ( (db->count == db->fragTotalSize) &&
1247 (db->nextIn == db->nextOut) ) ||
1248 ( (db->count < db->fragTotalSize) &&
1249 (db->nextIn != db->nextOut) ) );
1250
1251 spin_unlock_irqrestore(&s->lock, flags);
1252
1253 return totalCopyCount << (s->dacChannels-1);
1254
1255 }
1256
1257 static ssize_t vrc5477_ac97_write(struct file *file, const char *buffer,
1258 size_t count, loff_t *ppos)
1259 {
1260 struct vrc5477_ac97_state *s =
1261 (struct vrc5477_ac97_state *)file->private_data;
1262 struct dmabuf *db = &s->dma_dac;
1263 ssize_t ret;
1264 unsigned long flags;
1265 int copyCount, avail;
1266
1267 if (!access_ok(VERIFY_READ, buffer, count))
1268 return -EFAULT;
1269 ret = 0;
1270
1271 while (count > 0) {
1272 // wait for space in playback buffer
1273 do {
1274 spin_lock_irqsave(&s->lock, flags);
1275 avail = db->fragTotalSize - db->count;
1276 spin_unlock_irqrestore(&s->lock, flags);
1277 if (avail <= 0) {
1278 if (file->f_flags & O_NONBLOCK) {
1279 if (!ret)
1280 ret = -EAGAIN;
1281 return ret;
1282 }
1283 interruptible_sleep_on(&db->wait);
1284 if (signal_pending(current)) {
1285 if (!ret)
1286 ret = -ERESTARTSYS;
1287 return ret;
1288 }
1289 }
1290 } while (avail <= 0);
1291
1292 copyCount = copy_dac_from_user(s, buffer, count, avail);
1293 if (copyCount < 0) {
1294 if (!ret) ret = -EFAULT;
1295 return ret;
1296 }
1297
1298 count -= copyCount;
1299 buffer += copyCount;
1300 ret += copyCount;
1301 } // while (count > 0)
1302
1303 return ret;
1304 }
1305
1306 /* No kernel lock - we have our own spinlock */
1307 static unsigned int vrc5477_ac97_poll(struct file *file,
1308 struct poll_table_struct *wait)
1309 {
1310 struct vrc5477_ac97_state *s = (struct vrc5477_ac97_state *)file->private_data;
1311 unsigned long flags;
1312 unsigned int mask = 0;
1313
1314 if (file->f_mode & FMODE_WRITE)
1315 poll_wait(file, &s->dma_dac.wait, wait);
1316 if (file->f_mode & FMODE_READ)
1317 poll_wait(file, &s->dma_adc.wait, wait);
1318 spin_lock_irqsave(&s->lock, flags);
1319 if (file->f_mode & FMODE_READ) {
1320 if (s->dma_adc.count >= (signed)s->dma_adc.fragSize)
1321 mask |= POLLIN | POLLRDNORM;
1322 }
1323 if (file->f_mode & FMODE_WRITE) {
1324 if ((signed)s->dma_dac.fragTotalSize >=
1325 s->dma_dac.count + (signed)s->dma_dac.fragSize)
1326 mask |= POLLOUT | POLLWRNORM;
1327 }
1328 spin_unlock_irqrestore(&s->lock, flags);
1329 return mask;
1330 }
1331
1332 #ifdef VRC5477_AC97_DEBUG
1333 static struct ioctl_str_t {
1334 unsigned int cmd;
1335 const char* str;
1336 } ioctl_str[] = {
1337 {SNDCTL_DSP_RESET, "SNDCTL_DSP_RESET"},
1338 {SNDCTL_DSP_SYNC, "SNDCTL_DSP_SYNC"},
1339 {SNDCTL_DSP_SPEED, "SNDCTL_DSP_SPEED"},
1340 {SNDCTL_DSP_STEREO, "SNDCTL_DSP_STEREO"},
1341 {SNDCTL_DSP_GETBLKSIZE, "SNDCTL_DSP_GETBLKSIZE"},
1342 {SNDCTL_DSP_SETFMT, "SNDCTL_DSP_SETFMT"},
1343 {SNDCTL_DSP_SAMPLESIZE, "SNDCTL_DSP_SAMPLESIZE"},
1344 {SNDCTL_DSP_CHANNELS, "SNDCTL_DSP_CHANNELS"},
1345 {SOUND_PCM_WRITE_CHANNELS, "SOUND_PCM_WRITE_CHANNELS"},
1346 {SOUND_PCM_WRITE_FILTER, "SOUND_PCM_WRITE_FILTER"},
1347 {SNDCTL_DSP_POST, "SNDCTL_DSP_POST"},
1348 {SNDCTL_DSP_SUBDIVIDE, "SNDCTL_DSP_SUBDIVIDE"},
1349 {SNDCTL_DSP_SETFRAGMENT, "SNDCTL_DSP_SETFRAGMENT"},
1350 {SNDCTL_DSP_GETFMTS, "SNDCTL_DSP_GETFMTS"},
1351 {SNDCTL_DSP_GETOSPACE, "SNDCTL_DSP_GETOSPACE"},
1352 {SNDCTL_DSP_GETISPACE, "SNDCTL_DSP_GETISPACE"},
1353 {SNDCTL_DSP_NONBLOCK, "SNDCTL_DSP_NONBLOCK"},
1354 {SNDCTL_DSP_GETCAPS, "SNDCTL_DSP_GETCAPS"},
1355 {SNDCTL_DSP_GETTRIGGER, "SNDCTL_DSP_GETTRIGGER"},
1356 {SNDCTL_DSP_SETTRIGGER, "SNDCTL_DSP_SETTRIGGER"},
1357 {SNDCTL_DSP_GETIPTR, "SNDCTL_DSP_GETIPTR"},
1358 {SNDCTL_DSP_GETOPTR, "SNDCTL_DSP_GETOPTR"},
1359 {SNDCTL_DSP_MAPINBUF, "SNDCTL_DSP_MAPINBUF"},
1360 {SNDCTL_DSP_MAPOUTBUF, "SNDCTL_DSP_MAPOUTBUF"},
1361 {SNDCTL_DSP_SETSYNCRO, "SNDCTL_DSP_SETSYNCRO"},
1362 {SNDCTL_DSP_SETDUPLEX, "SNDCTL_DSP_SETDUPLEX"},
1363 {SNDCTL_DSP_GETODELAY, "SNDCTL_DSP_GETODELAY"},
1364 {SNDCTL_DSP_GETCHANNELMASK, "SNDCTL_DSP_GETCHANNELMASK"},
1365 {SNDCTL_DSP_BIND_CHANNEL, "SNDCTL_DSP_BIND_CHANNEL"},
1366 {OSS_GETVERSION, "OSS_GETVERSION"},
1367 {SOUND_PCM_READ_RATE, "SOUND_PCM_READ_RATE"},
1368 {SOUND_PCM_READ_CHANNELS, "SOUND_PCM_READ_CHANNELS"},
1369 {SOUND_PCM_READ_BITS, "SOUND_PCM_READ_BITS"},
1370 {SOUND_PCM_READ_FILTER, "SOUND_PCM_READ_FILTER"}
1371 };
1372 #endif
1373
1374 static int vrc5477_ac97_ioctl(struct inode *inode, struct file *file,
1375 unsigned int cmd, unsigned long arg)
1376 {
1377 struct vrc5477_ac97_state *s = (struct vrc5477_ac97_state *)file->private_data;
1378 unsigned long flags;
1379 audio_buf_info abinfo;
1380 int count;
1381 int val, ret;
1382
1383 #ifdef VRC5477_AC97_DEBUG
1384 for (count = 0; count < ARRAY_SIZE(ioctl_str); count++) {
1385 if (ioctl_str[count].cmd == cmd)
1386 break;
1387 }
1388 if (count < ARRAY_SIZE(ioctl_str))
1389 printk(KERN_INFO PFX "ioctl %s\n", ioctl_str[count].str);
1390 else
1391 printk(KERN_INFO PFX "ioctl unknown, 0x%x\n", cmd);
1392 #endif
1393
1394 switch (cmd) {
1395 case OSS_GETVERSION:
1396 return put_user(SOUND_VERSION, (int *)arg);
1397
1398 case SNDCTL_DSP_SYNC:
1399 if (file->f_mode & FMODE_WRITE)
1400 return drain_dac(s, file->f_flags & O_NONBLOCK);
1401 return 0;
1402
1403 case SNDCTL_DSP_SETDUPLEX:
1404 return 0;
1405
1406 case SNDCTL_DSP_GETCAPS:
1407 return put_user(DSP_CAP_DUPLEX, (int *)arg);
1408
1409 case SNDCTL_DSP_RESET:
1410 if (file->f_mode & FMODE_WRITE) {
1411 stop_dac(s);
1412 synchronize_irq(s->irq);
1413 s->dma_dac.count = 0;
1414 s->dma_dac.nextIn = s->dma_dac.nextOut = 0;
1415 }
1416 if (file->f_mode & FMODE_READ) {
1417 stop_adc(s);
1418 synchronize_irq(s->irq);
1419 s->dma_adc.count = 0;
1420 s->dma_adc.nextIn = s->dma_adc.nextOut = 0;
1421 }
1422 return 0;
1423
1424 case SNDCTL_DSP_SPEED:
1425 if (get_user(val, (int *)arg))
1426 return -EFAULT;
1427 if (val >= 0) {
1428 if (file->f_mode & FMODE_READ) {
1429 stop_adc(s);
1430 set_adc_rate(s, val);
1431 if ((ret = prog_dmabuf_adc(s)))
1432 return ret;
1433 }
1434 if (file->f_mode & FMODE_WRITE) {
1435 stop_dac(s);
1436 set_dac_rate(s, val);
1437 if ((ret = prog_dmabuf_dac(s)))
1438 return ret;
1439 }
1440 }
1441 return put_user((file->f_mode & FMODE_READ) ?
1442 s->adcRate : s->dacRate, (int *)arg);
1443
1444 case SNDCTL_DSP_STEREO:
1445 if (get_user(val, (int *)arg))
1446 return -EFAULT;
1447 if (file->f_mode & FMODE_READ) {
1448 stop_adc(s);
1449 if (val)
1450 s->adcChannels = 2;
1451 else
1452 s->adcChannels = 1;
1453 if ((ret = prog_dmabuf_adc(s)))
1454 return ret;
1455 }
1456 if (file->f_mode & FMODE_WRITE) {
1457 stop_dac(s);
1458 if (val)
1459 s->dacChannels = 2;
1460 else
1461 s->dacChannels = 1;
1462 if ((ret = prog_dmabuf_dac(s)))
1463 return ret;
1464 }
1465 return 0;
1466
1467 case SNDCTL_DSP_CHANNELS:
1468 if (get_user(val, (int *)arg))
1469 return -EFAULT;
1470 if (val != 0) {
1471 if ( (val != 1) && (val != 2)) val = 2;
1472
1473 if (file->f_mode & FMODE_READ) {
1474 stop_adc(s);
1475 s->dacChannels = val;
1476 if ((ret = prog_dmabuf_adc(s)))
1477 return ret;
1478 }
1479 if (file->f_mode & FMODE_WRITE) {
1480 stop_dac(s);
1481 s->dacChannels = val;
1482 if ((ret = prog_dmabuf_dac(s)))
1483 return ret;
1484 }
1485 }
1486 return put_user(val, (int *)arg);
1487
1488 case SNDCTL_DSP_GETFMTS: /* Returns a mask */
1489 return put_user(AFMT_S16_LE, (int *)arg);
1490
1491 case SNDCTL_DSP_SETFMT: /* Selects ONE fmt*/
1492 if (get_user(val, (int *)arg))
1493 return -EFAULT;
1494 if (val != AFMT_QUERY) {
1495 if (val != AFMT_S16_LE) return -EINVAL;
1496 if (file->f_mode & FMODE_READ) {
1497 stop_adc(s);
1498 if ((ret = prog_dmabuf_adc(s)))
1499 return ret;
1500 }
1501 if (file->f_mode & FMODE_WRITE) {
1502 stop_dac(s);
1503 if ((ret = prog_dmabuf_dac(s)))
1504 return ret;
1505 }
1506 } else {
1507 val = AFMT_S16_LE;
1508 }
1509 return put_user(val, (int *)arg);
1510
1511 case SNDCTL_DSP_POST:
1512 return 0;
1513
1514 case SNDCTL_DSP_GETTRIGGER:
1515 case SNDCTL_DSP_SETTRIGGER:
1516 /* NO trigger */
1517 return -EINVAL;
1518
1519 case SNDCTL_DSP_GETOSPACE:
1520 if (!(file->f_mode & FMODE_WRITE))
1521 return -EINVAL;
1522 abinfo.fragsize = s->dma_dac.fragSize << (s->dacChannels-1);
1523 spin_lock_irqsave(&s->lock, flags);
1524 count = s->dma_dac.count;
1525 spin_unlock_irqrestore(&s->lock, flags);
1526 abinfo.bytes = (s->dma_dac.fragTotalSize - count) <<
1527 (s->dacChannels-1);
1528 abinfo.fragstotal = s->dma_dac.numFrag;
1529 abinfo.fragments = abinfo.bytes >> s->dma_dac.fragShift >>
1530 (s->dacChannels-1);
1531 return copy_to_user((void *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
1532
1533 case SNDCTL_DSP_GETISPACE:
1534 if (!(file->f_mode & FMODE_READ))
1535 return -EINVAL;
1536 abinfo.fragsize = s->dma_adc.fragSize << (s->adcChannels-1);
1537 spin_lock_irqsave(&s->lock, flags);
1538 count = s->dma_adc.count;
1539 spin_unlock_irqrestore(&s->lock, flags);
1540 if (count < 0)
1541 count = 0;
1542 abinfo.bytes = count << (s->adcChannels-1);
1543 abinfo.fragstotal = s->dma_adc.numFrag;
1544 abinfo.fragments = (abinfo.bytes >> s->dma_adc.fragShift) >>
1545 (s->adcChannels-1);
1546 return copy_to_user((void *)arg, &abinfo, sizeof(abinfo)) ? -EFAULT : 0;
1547
1548 case SNDCTL_DSP_NONBLOCK:
1549 file->f_flags |= O_NONBLOCK;
1550 return 0;
1551
1552 case SNDCTL_DSP_GETODELAY:
1553 if (!(file->f_mode & FMODE_WRITE))
1554 return -EINVAL;
1555 spin_lock_irqsave(&s->lock, flags);
1556 count = s->dma_dac.count;
1557 spin_unlock_irqrestore(&s->lock, flags);
1558 return put_user(count, (int *)arg);
1559
1560 case SNDCTL_DSP_GETIPTR:
1561 case SNDCTL_DSP_GETOPTR:
1562 /* we cannot get DMA ptr */
1563 return -EINVAL;
1564
1565 case SNDCTL_DSP_GETBLKSIZE:
1566 if (file->f_mode & FMODE_WRITE)
1567 return put_user(s->dma_dac.fragSize << (s->dacChannels-1), (int *)arg);
1568 else
1569 return put_user(s->dma_adc.fragSize << (s->adcChannels-1), (int *)arg);
1570
1571 case SNDCTL_DSP_SETFRAGMENT:
1572 /* we ignore fragment size request */
1573 return 0;
1574
1575 case SNDCTL_DSP_SUBDIVIDE:
1576 /* what is this for? [jsun] */
1577 return 0;
1578
1579 case SOUND_PCM_READ_RATE:
1580 return put_user((file->f_mode & FMODE_READ) ?
1581 s->adcRate : s->dacRate, (int *)arg);
1582
1583 case SOUND_PCM_READ_CHANNELS:
1584 if (file->f_mode & FMODE_READ)
1585 return put_user(s->adcChannels, (int *)arg);
1586 else
1587 return put_user(s->dacChannels ? 2 : 1, (int *)arg);
1588
1589 case SOUND_PCM_READ_BITS:
1590 return put_user(16, (int *)arg);
1591
1592 case SOUND_PCM_WRITE_FILTER:
1593 case SNDCTL_DSP_SETSYNCRO:
1594 case SOUND_PCM_READ_FILTER:
1595 return -EINVAL;
1596 }
1597
1598 return mixdev_ioctl(s->codec, cmd, arg);
1599 }
1600
1601
1602 static int vrc5477_ac97_open(struct inode *inode, struct file *file)
1603 {
1604 int minor = iminor(inode);
1605 DECLARE_WAITQUEUE(wait, current);
1606 unsigned long flags;
1607 struct list_head *list;
1608 struct vrc5477_ac97_state *s;
1609 int ret=0;
1610
1611 nonseekable_open(inode, file);
1612 for (list = devs.next; ; list = list->next) {
1613 if (list == &devs)
1614 return -ENODEV;
1615 s = list_entry(list, struct vrc5477_ac97_state, devs);
1616 if (!((s->dev_audio ^ minor) & ~0xf))
1617 break;
1618 }
1619 file->private_data = s;
1620
1621 /* wait for device to become free */
1622 mutex_lock(&s->open_mutex);
1623 while (s->open_mode & file->f_mode) {
1624
1625 if (file->f_flags & O_NONBLOCK) {
1626 mutex_unlock(&s->open_mutex);
1627 return -EBUSY;
1628 }
1629 add_wait_queue(&s->open_wait, &wait);
1630 __set_current_state(TASK_INTERRUPTIBLE);
1631 mutex_unlock(&s->open_mutex);
1632 schedule();
1633 remove_wait_queue(&s->open_wait, &wait);
1634 set_current_state(TASK_RUNNING);
1635 if (signal_pending(current))
1636 return -ERESTARTSYS;
1637 mutex_lock(&s->open_mutex);
1638 }
1639
1640 spin_lock_irqsave(&s->lock, flags);
1641
1642 if (file->f_mode & FMODE_READ) {
1643 /* set default settings */
1644 set_adc_rate(s, 48000);
1645 s->adcChannels = 2;
1646
1647 ret = prog_dmabuf_adc(s);
1648 if (ret) goto bailout;
1649 }
1650 if (file->f_mode & FMODE_WRITE) {
1651 /* set default settings */
1652 set_dac_rate(s, 48000);
1653 s->dacChannels = 2;
1654
1655 ret = prog_dmabuf_dac(s);
1656 if (ret) goto bailout;
1657 }
1658
1659 s->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
1660
1661 bailout:
1662 spin_unlock_irqrestore(&s->lock, flags);
1663
1664 mutex_unlock(&s->open_mutex);
1665 return ret;
1666 }
1667
1668 static int vrc5477_ac97_release(struct inode *inode, struct file *file)
1669 {
1670 struct vrc5477_ac97_state *s =
1671 (struct vrc5477_ac97_state *)file->private_data;
1672
1673 lock_kernel();
1674 if (file->f_mode & FMODE_WRITE)
1675 drain_dac(s, file->f_flags & O_NONBLOCK);
1676 mutex_lock(&s->open_mutex);
1677 if (file->f_mode & FMODE_WRITE) {
1678 stop_dac(s);
1679 dealloc_dmabuf(s, &s->dma_dac);
1680 }
1681 if (file->f_mode & FMODE_READ) {
1682 stop_adc(s);
1683 dealloc_dmabuf(s, &s->dma_adc);
1684 }
1685 s->open_mode &= (~file->f_mode) & (FMODE_READ|FMODE_WRITE);
1686 mutex_unlock(&s->open_mutex);
1687 wake_up(&s->open_wait);
1688 unlock_kernel();
1689 return 0;
1690 }
1691
1692 static /*const*/ struct file_operations vrc5477_ac97_audio_fops = {
1693 .owner = THIS_MODULE,
1694 .llseek = no_llseek,
1695 .read = vrc5477_ac97_read,
1696 .write = vrc5477_ac97_write,
1697 .poll = vrc5477_ac97_poll,
1698 .ioctl = vrc5477_ac97_ioctl,
1699 // .mmap = vrc5477_ac97_mmap,
1700 .open = vrc5477_ac97_open,
1701 .release = vrc5477_ac97_release,
1702 };
1703
1704
1705 /* --------------------------------------------------------------------- */
1706
1707
1708 /* --------------------------------------------------------------------- */
1709
1710 /*
1711 * for debugging purposes, we'll create a proc device that dumps the
1712 * CODEC chipstate
1713 */
1714
1715 #ifdef VRC5477_AC97_DEBUG
1716
1717 struct {
1718 const char *regname;
1719 unsigned regaddr;
1720 } vrc5477_ac97_regs[] = {
1721 {"VRC5477_INT_STATUS", VRC5477_INT_STATUS},
1722 {"VRC5477_CODEC_WR", VRC5477_CODEC_WR},
1723 {"VRC5477_CODEC_RD", VRC5477_CODEC_RD},
1724 {"VRC5477_CTRL", VRC5477_CTRL},
1725 {"VRC5477_ACLINK_CTRL", VRC5477_ACLINK_CTRL},
1726 {"VRC5477_INT_MASK", VRC5477_INT_MASK},
1727 {"VRC5477_DAC1_CTRL", VRC5477_DAC1_CTRL},
1728 {"VRC5477_DAC1L", VRC5477_DAC1L},
1729 {"VRC5477_DAC1_BADDR", VRC5477_DAC1_BADDR},
1730 {"VRC5477_DAC2_CTRL", VRC5477_DAC2_CTRL},
1731 {"VRC5477_DAC2L", VRC5477_DAC2L},
1732 {"VRC5477_DAC2_BADDR", VRC5477_DAC2_BADDR},
1733 {"VRC5477_DAC3_CTRL", VRC5477_DAC3_CTRL},
1734 {"VRC5477_DAC3L", VRC5477_DAC3L},
1735 {"VRC5477_DAC3_BADDR", VRC5477_DAC3_BADDR},
1736 {"VRC5477_ADC1_CTRL", VRC5477_ADC1_CTRL},
1737 {"VRC5477_ADC1L", VRC5477_ADC1L},
1738 {"VRC5477_ADC1_BADDR", VRC5477_ADC1_BADDR},
1739 {"VRC5477_ADC2_CTRL", VRC5477_ADC2_CTRL},
1740 {"VRC5477_ADC2L", VRC5477_ADC2L},
1741 {"VRC5477_ADC2_BADDR", VRC5477_ADC2_BADDR},
1742 {"VRC5477_ADC3_CTRL", VRC5477_ADC3_CTRL},
1743 {"VRC5477_ADC3L", VRC5477_ADC3L},
1744 {"VRC5477_ADC3_BADDR", VRC5477_ADC3_BADDR},
1745 {NULL, 0x0}
1746 };
1747
1748 static int proc_vrc5477_ac97_dump (char *buf, char **start, off_t fpos,
1749 int length, int *eof, void *data)
1750 {
1751 struct vrc5477_ac97_state *s;
1752 int cnt, len = 0;
1753
1754 if (list_empty(&devs))
1755 return 0;
1756 s = list_entry(devs.next, struct vrc5477_ac97_state, devs);
1757
1758 /* print out header */
1759 len += sprintf(buf + len, "\n\t\tVrc5477 Audio Debug\n\n");
1760
1761 // print out digital controller state
1762 len += sprintf (buf + len, "NEC Vrc5477 Audio Controller registers\n");
1763 len += sprintf (buf + len, "---------------------------------\n");
1764 for (cnt=0; vrc5477_ac97_regs[cnt].regname != NULL; cnt++) {
1765 len+= sprintf (buf + len, "%-20s = %08x\n",
1766 vrc5477_ac97_regs[cnt].regname,
1767 inl(s->io + vrc5477_ac97_regs[cnt].regaddr));
1768 }
1769
1770 /* print out driver state */
1771 len += sprintf (buf + len, "NEC Vrc5477 Audio driver states\n");
1772 len += sprintf (buf + len, "---------------------------------\n");
1773 len += sprintf (buf + len, "dacChannels = %d\n", s->dacChannels);
1774 len += sprintf (buf + len, "adcChannels = %d\n", s->adcChannels);
1775 len += sprintf (buf + len, "dacRate = %d\n", s->dacRate);
1776 len += sprintf (buf + len, "adcRate = %d\n", s->adcRate);
1777
1778 len += sprintf (buf + len, "dma_dac is %s ready\n",
1779 s->dma_dac.ready? "" : "not");
1780 if (s->dma_dac.ready) {
1781 len += sprintf (buf + len, "dma_dac is %s stopped.\n",
1782 s->dma_dac.stopped? "" : "not");
1783 len += sprintf (buf + len, "dma_dac.fragSize = %x\n",
1784 s->dma_dac.fragSize);
1785 len += sprintf (buf + len, "dma_dac.fragShift = %x\n",
1786 s->dma_dac.fragShift);
1787 len += sprintf (buf + len, "dma_dac.numFrag = %x\n",
1788 s->dma_dac.numFrag);
1789 len += sprintf (buf + len, "dma_dac.fragTotalSize = %x\n",
1790 s->dma_dac.fragTotalSize);
1791 len += sprintf (buf + len, "dma_dac.nextIn = %x\n",
1792 s->dma_dac.nextIn);
1793 len += sprintf (buf + len, "dma_dac.nextOut = %x\n",
1794 s->dma_dac.nextOut);
1795 len += sprintf (buf + len, "dma_dac.count = %x\n",
1796 s->dma_dac.count);
1797 }
1798
1799 len += sprintf (buf + len, "dma_adc is %s ready\n",
1800 s->dma_adc.ready? "" : "not");
1801 if (s->dma_adc.ready) {
1802 len += sprintf (buf + len, "dma_adc is %s stopped.\n",
1803 s->dma_adc.stopped? "" : "not");
1804 len += sprintf (buf + len, "dma_adc.fragSize = %x\n",
1805 s->dma_adc.fragSize);
1806 len += sprintf (buf + len, "dma_adc.fragShift = %x\n",
1807 s->dma_adc.fragShift);
1808 len += sprintf (buf + len, "dma_adc.numFrag = %x\n",
1809 s->dma_adc.numFrag);
1810 len += sprintf (buf + len, "dma_adc.fragTotalSize = %x\n",
1811 s->dma_adc.fragTotalSize);
1812 len += sprintf (buf + len, "dma_adc.nextIn = %x\n",
1813 s->dma_adc.nextIn);
1814 len += sprintf (buf + len, "dma_adc.nextOut = %x\n",
1815 s->dma_adc.nextOut);
1816 len += sprintf (buf + len, "dma_adc.count = %x\n",
1817 s->dma_adc.count);
1818 }
1819
1820 /* print out CODEC state */
1821 len += sprintf (buf + len, "\nAC97 CODEC registers\n");
1822 len += sprintf (buf + len, "----------------------\n");
1823 for (cnt=0; cnt <= 0x7e; cnt = cnt +2)
1824 len+= sprintf (buf + len, "reg %02x = %04x\n",
1825 cnt, rdcodec(s->codec, cnt));
1826
1827 if (fpos >=len){
1828 *start = buf;
1829 *eof =1;
1830 return 0;
1831 }
1832 *start = buf + fpos;
1833 if ((len -= fpos) > length)
1834 return length;
1835 *eof =1;
1836 return len;
1837
1838 }
1839 #endif /* VRC5477_AC97_DEBUG */
1840
1841 /* --------------------------------------------------------------------- */
1842
1843 /* maximum number of devices; only used for command line params */
1844 #define NR_DEVICE 5
1845
1846 static unsigned int devindex;
1847
1848 MODULE_AUTHOR("Monta Vista Software, jsun@mvista.com or jsun@junsun.net");
1849 MODULE_DESCRIPTION("NEC Vrc5477 audio (AC97) Driver");
1850 MODULE_LICENSE("GPL");
1851
1852 static int __devinit vrc5477_ac97_probe(struct pci_dev *pcidev,
1853 const struct pci_device_id *pciid)
1854 {
1855 struct vrc5477_ac97_state *s;
1856 #ifdef VRC5477_AC97_DEBUG
1857 char proc_str[80];
1858 #endif
1859
1860 if (pcidev->irq == 0)
1861 return -1;
1862
1863 if (!(s = kzalloc(sizeof(struct vrc5477_ac97_state), GFP_KERNEL))) {
1864 printk(KERN_ERR PFX "alloc of device struct failed\n");
1865 return -1;
1866 }
1867
1868 init_waitqueue_head(&s->dma_adc.wait);
1869 init_waitqueue_head(&s->dma_dac.wait);
1870 init_waitqueue_head(&s->open_wait);
1871 mutex_init(&s->open_mutex);
1872 spin_lock_init(&s->lock);
1873
1874 s->dev = pcidev;
1875 s->io = pci_resource_start(pcidev, 0);
1876 s->irq = pcidev->irq;
1877
1878 s->codec = ac97_alloc_codec();
1879
1880 s->codec->private_data = s;
1881 s->codec->id = 0;
1882 s->codec->codec_read = rdcodec;
1883 s->codec->codec_write = wrcodec;
1884 s->codec->codec_wait = waitcodec;
1885
1886 /* setting some other default values such as
1887 * adcChannels, adcRate is done in open() so that
1888 * no persistent state across file opens.
1889 */
1890
1891 /* test if get response from ac97, if not return */
1892 if (ac97_codec_not_present(s->codec)) {
1893 printk(KERN_ERR PFX "no ac97 codec\n");
1894 goto err_region;
1895
1896 }
1897
1898 /* test if get response from ac97, if not return */
1899 if (ac97_codec_not_present(&(s->codec))) {
1900 printk(KERN_ERR PFX "no ac97 codec\n");
1901 goto err_region;
1902
1903 }
1904
1905 if (!request_region(s->io, pci_resource_len(pcidev,0),
1906 VRC5477_AC97_MODULE_NAME)) {
1907 printk(KERN_ERR PFX "io ports %#lx->%#lx in use\n",
1908 s->io, s->io + pci_resource_len(pcidev,0)-1);
1909 goto err_region;
1910 }
1911 if (request_irq(s->irq, vrc5477_ac97_interrupt, IRQF_DISABLED,
1912 VRC5477_AC97_MODULE_NAME, s)) {
1913 printk(KERN_ERR PFX "irq %u in use\n", s->irq);
1914 goto err_irq;
1915 }
1916
1917 printk(KERN_INFO PFX "IO at %#lx, IRQ %d\n", s->io, s->irq);
1918
1919 /* register devices */
1920 if ((s->dev_audio = register_sound_dsp(&vrc5477_ac97_audio_fops, -1)) < 0)
1921 goto err_dev1;
1922 if ((s->codec->dev_mixer =
1923 register_sound_mixer(&vrc5477_ac97_mixer_fops, -1)) < 0)
1924 goto err_dev2;
1925
1926 #ifdef VRC5477_AC97_DEBUG
1927 /* initialize the debug proc device */
1928 s->ps = create_proc_read_entry(VRC5477_AC97_MODULE_NAME, 0, NULL,
1929 proc_vrc5477_ac97_dump, NULL);
1930 #endif /* VRC5477_AC97_DEBUG */
1931
1932 /* enable pci io and bus mastering */
1933 if (pci_enable_device(pcidev))
1934 goto err_dev3;
1935 pci_set_master(pcidev);
1936
1937 /* cold reset the AC97 */
1938 outl(VRC5477_ACLINK_CTRL_RST_ON | VRC5477_ACLINK_CTRL_RST_TIME,
1939 s->io + VRC5477_ACLINK_CTRL);
1940 while (inl(s->io + VRC5477_ACLINK_CTRL) & VRC5477_ACLINK_CTRL_RST_ON);
1941
1942 /* codec init */
1943 if (!ac97_probe_codec(s->codec))
1944 goto err_dev3;
1945
1946 #ifdef VRC5477_AC97_DEBUG
1947 sprintf(proc_str, "driver/%s/%d/ac97",
1948 VRC5477_AC97_MODULE_NAME, s->codec->id);
1949 s->ac97_ps = create_proc_read_entry (proc_str, 0, NULL,
1950 ac97_read_proc, s->codec);
1951 /* TODO : why this proc file does not show up? */
1952 #endif
1953
1954 /* Try to enable variable rate audio mode. */
1955 wrcodec(s->codec, AC97_EXTENDED_STATUS,
1956 rdcodec(s->codec, AC97_EXTENDED_STATUS) | AC97_EXTSTAT_VRA);
1957 /* Did we enable it? */
1958 if(rdcodec(s->codec, AC97_EXTENDED_STATUS) & AC97_EXTSTAT_VRA)
1959 s->extended_status |= AC97_EXTSTAT_VRA;
1960 else {
1961 s->dacRate = 48000;
1962 printk(KERN_INFO PFX "VRA mode not enabled; rate fixed at %d.",
1963 s->dacRate);
1964 }
1965
1966 /* let us get the default volumne louder */
1967 wrcodec(s->codec, 0x2, 0x1010); /* master volume, middle */
1968 wrcodec(s->codec, 0xc, 0x10); /* phone volume, middle */
1969 // wrcodec(s->codec, 0xe, 0x10); /* misc volume, middle */
1970 wrcodec(s->codec, 0x10, 0x8000); /* line-in 2 line-out disable */
1971 wrcodec(s->codec, 0x18, 0x0707); /* PCM out (line out) middle */
1972
1973
1974 /* by default we select line in the input */
1975 wrcodec(s->codec, 0x1a, 0x0404);
1976 wrcodec(s->codec, 0x1c, 0x0f0f);
1977 wrcodec(s->codec, 0x1e, 0x07);
1978
1979 /* enable the master interrupt but disable all others */
1980 outl(VRC5477_INT_MASK_NMASK, s->io + VRC5477_INT_MASK);
1981
1982 /* store it in the driver field */
1983 pci_set_drvdata(pcidev, s);
1984 pcidev->dma_mask = 0xffffffff;
1985 /* put it into driver list */
1986 list_add_tail(&s->devs, &devs);
1987 /* increment devindex */
1988 if (devindex < NR_DEVICE-1)
1989 devindex++;
1990 return 0;
1991
1992 err_dev3:
1993 unregister_sound_mixer(s->codec->dev_mixer);
1994 err_dev2:
1995 unregister_sound_dsp(s->dev_audio);
1996 err_dev1:
1997 printk(KERN_ERR PFX "cannot register misc device\n");
1998 free_irq(s->irq, s);
1999 err_irq:
2000 release_region(s->io, pci_resource_len(pcidev,0));
2001 err_region:
2002 ac97_release_codec(codec);
2003 kfree(s);
2004 return -1;
2005 }
2006
2007 static void __devexit vrc5477_ac97_remove(struct pci_dev *dev)
2008 {
2009 struct vrc5477_ac97_state *s = pci_get_drvdata(dev);
2010
2011 if (!s)
2012 return;
2013 list_del(&s->devs);
2014
2015 #ifdef VRC5477_AC97_DEBUG
2016 if (s->ps)
2017 remove_proc_entry(VRC5477_AC97_MODULE_NAME, NULL);
2018 #endif /* VRC5477_AC97_DEBUG */
2019
2020 synchronize_irq();
2021 free_irq(s->irq, s);
2022 release_region(s->io, pci_resource_len(dev,0));
2023 unregister_sound_dsp(s->dev_audio);
2024 unregister_sound_mixer(s->codec->dev_mixer);
2025 ac97_release_codec(s->codec);
2026 kfree(s);
2027 pci_set_drvdata(dev, NULL);
2028 }
2029
2030
2031 static struct pci_device_id id_table[] = {
2032 { PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_VRC5477_AC97,
2033 PCI_ANY_ID, PCI_ANY_ID, 0, 0 },
2034 { 0, }
2035 };
2036
2037 MODULE_DEVICE_TABLE(pci, id_table);
2038
2039 static struct pci_driver vrc5477_ac97_driver = {
2040 .name = VRC5477_AC97_MODULE_NAME,
2041 .id_table = id_table,
2042 .probe = vrc5477_ac97_probe,
2043 .remove = __devexit_p(vrc5477_ac97_remove)
2044 };
2045
2046 static int __init init_vrc5477_ac97(void)
2047 {
2048 printk("Vrc5477 AC97 driver: version v0.2 time " __TIME__ " " __DATE__ " by Jun Sun\n");
2049 return pci_register_driver(&vrc5477_ac97_driver);
2050 }
2051
2052 static void __exit cleanup_vrc5477_ac97(void)
2053 {
2054 printk(KERN_INFO PFX "unloading\n");
2055 pci_unregister_driver(&vrc5477_ac97_driver);
2056 }
2057
2058 module_init(init_vrc5477_ac97);
2059 module_exit(cleanup_vrc5477_ac97);
2060
WRT350N Kernel Patches