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Linux-2.6.12-rc2
[GitHub/mt8127/android_kernel_alcatel_ttab.git] / sound / oss / au1550_ac97.c
1 /*
2 * au1550_ac97.c -- Sound driver for Alchemy Au1550 MIPS Internet Edge
3 * Processor.
4 *
5 * Copyright 2004 Embedded Edge, LLC
6 * dan@embeddededge.com
7 *
8 * Mostly copied from the au1000.c driver and some from the
9 * PowerMac dbdma driver.
10 * We assume the processor can do memory coherent DMA.
11 *
12 * Ported to 2.6 by Matt Porter <mporter@kernel.crashing.org>
13 *
14 * This program is free software; you can redistribute it and/or modify it
15 * under the terms of the GNU General Public License as published by the
16 * Free Software Foundation; either version 2 of the License, or (at your
17 * option) any later version.
18 *
19 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED
20 * WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
21 * MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN
22 * NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
23 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
24 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF
25 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
26 * ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
27 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
28 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
29 *
30 * You should have received a copy of the GNU General Public License along
31 * with this program; if not, write to the Free Software Foundation, Inc.,
32 * 675 Mass Ave, Cambridge, MA 02139, USA.
33 *
34 */
35
36 #undef DEBUG
37
38 #include <linux/version.h>
39 #include <linux/module.h>
40 #include <linux/string.h>
41 #include <linux/ioport.h>
42 #include <linux/sched.h>
43 #include <linux/delay.h>
44 #include <linux/sound.h>
45 #include <linux/slab.h>
46 #include <linux/soundcard.h>
47 #include <linux/init.h>
48 #include <linux/interrupt.h>
49 #include <linux/kernel.h>
50 #include <linux/poll.h>
51 #include <linux/pci.h>
52 #include <linux/bitops.h>
53 #include <linux/spinlock.h>
54 #include <linux/smp_lock.h>
55 #include <linux/ac97_codec.h>
56 #include <asm/io.h>
57 #include <asm/uaccess.h>
58 #include <asm/hardirq.h>
59 #include <asm/mach-au1x00/au1000.h>
60 #include <asm/mach-au1x00/au1xxx_psc.h>
61 #include <asm/mach-au1x00/au1xxx_dbdma.h>
62
63 #undef OSS_DOCUMENTED_MIXER_SEMANTICS
64
65 /* misc stuff */
66 #define POLL_COUNT 0x50000
67 #define AC97_EXT_DACS (AC97_EXTID_SDAC | AC97_EXTID_CDAC | AC97_EXTID_LDAC)
68
69 /* The number of DBDMA ring descriptors to allocate. No sense making
70 * this too large....if you can't keep up with a few you aren't likely
71 * to be able to with lots of them, either.
72 */
73 #define NUM_DBDMA_DESCRIPTORS 4
74
75 #define err(format, arg...) printk(KERN_ERR format "\n" , ## arg)
76
77 /* Boot options
78 * 0 = no VRA, 1 = use VRA if codec supports it
79 */
80 static int vra = 1;
81 MODULE_PARM(vra, "i");
82 MODULE_PARM_DESC(vra, "if 1 use VRA if codec supports it");
83
84 static struct au1550_state {
85 /* soundcore stuff */
86 int dev_audio;
87
88 struct ac97_codec *codec;
89 unsigned codec_base_caps; /* AC'97 reg 00h, "Reset Register" */
90 unsigned codec_ext_caps; /* AC'97 reg 28h, "Extended Audio ID" */
91 int no_vra; /* do not use VRA */
92
93 spinlock_t lock;
94 struct semaphore open_sem;
95 struct semaphore sem;
96 mode_t open_mode;
97 wait_queue_head_t open_wait;
98
99 struct dmabuf {
100 u32 dmanr;
101 unsigned sample_rate;
102 unsigned src_factor;
103 unsigned sample_size;
104 int num_channels;
105 int dma_bytes_per_sample;
106 int user_bytes_per_sample;
107 int cnt_factor;
108
109 void *rawbuf;
110 unsigned buforder;
111 unsigned numfrag;
112 unsigned fragshift;
113 void *nextIn;
114 void *nextOut;
115 int count;
116 unsigned total_bytes;
117 unsigned error;
118 wait_queue_head_t wait;
119
120 /* redundant, but makes calculations easier */
121 unsigned fragsize;
122 unsigned dma_fragsize;
123 unsigned dmasize;
124 unsigned dma_qcount;
125
126 /* OSS stuff */
127 unsigned mapped:1;
128 unsigned ready:1;
129 unsigned stopped:1;
130 unsigned ossfragshift;
131 int ossmaxfrags;
132 unsigned subdivision;
133 } dma_dac, dma_adc;
134 } au1550_state;
135
136 static unsigned
137 ld2(unsigned int x)
138 {
139 unsigned r = 0;
140
141 if (x >= 0x10000) {
142 x >>= 16;
143 r += 16;
144 }
145 if (x >= 0x100) {
146 x >>= 8;
147 r += 8;
148 }
149 if (x >= 0x10) {
150 x >>= 4;
151 r += 4;
152 }
153 if (x >= 4) {
154 x >>= 2;
155 r += 2;
156 }
157 if (x >= 2)
158 r++;
159 return r;
160 }
161
162 static void
163 au1550_delay(int msec)
164 {
165 unsigned long tmo;
166 signed long tmo2;
167
168 if (in_interrupt())
169 return;
170
171 tmo = jiffies + (msec * HZ) / 1000;
172 for (;;) {
173 tmo2 = tmo - jiffies;
174 if (tmo2 <= 0)
175 break;
176 schedule_timeout(tmo2);
177 }
178 }
179
180 static u16
181 rdcodec(struct ac97_codec *codec, u8 addr)
182 {
183 struct au1550_state *s = (struct au1550_state *)codec->private_data;
184 unsigned long flags;
185 u32 cmd, val;
186 u16 data;
187 int i;
188
189 spin_lock_irqsave(&s->lock, flags);
190
191 for (i = 0; i < POLL_COUNT; i++) {
192 val = au_readl(PSC_AC97STAT);
193 au_sync();
194 if (!(val & PSC_AC97STAT_CP))
195 break;
196 }
197 if (i == POLL_COUNT)
198 err("rdcodec: codec cmd pending expired!");
199
200 cmd = (u32)PSC_AC97CDC_INDX(addr);
201 cmd |= PSC_AC97CDC_RD; /* read command */
202 au_writel(cmd, PSC_AC97CDC);
203 au_sync();
204
205 /* now wait for the data
206 */
207 for (i = 0; i < POLL_COUNT; i++) {
208 val = au_readl(PSC_AC97STAT);
209 au_sync();
210 if (!(val & PSC_AC97STAT_CP))
211 break;
212 }
213 if (i == POLL_COUNT) {
214 err("rdcodec: read poll expired!");
215 return 0;
216 }
217
218 /* wait for command done?
219 */
220 for (i = 0; i < POLL_COUNT; i++) {
221 val = au_readl(PSC_AC97EVNT);
222 au_sync();
223 if (val & PSC_AC97EVNT_CD)
224 break;
225 }
226 if (i == POLL_COUNT) {
227 err("rdcodec: read cmdwait expired!");
228 return 0;
229 }
230
231 data = au_readl(PSC_AC97CDC) & 0xffff;
232 au_sync();
233
234 /* Clear command done event.
235 */
236 au_writel(PSC_AC97EVNT_CD, PSC_AC97EVNT);
237 au_sync();
238
239 spin_unlock_irqrestore(&s->lock, flags);
240
241 return data;
242 }
243
244
245 static void
246 wrcodec(struct ac97_codec *codec, u8 addr, u16 data)
247 {
248 struct au1550_state *s = (struct au1550_state *)codec->private_data;
249 unsigned long flags;
250 u32 cmd, val;
251 int i;
252
253 spin_lock_irqsave(&s->lock, flags);
254
255 for (i = 0; i < POLL_COUNT; i++) {
256 val = au_readl(PSC_AC97STAT);
257 au_sync();
258 if (!(val & PSC_AC97STAT_CP))
259 break;
260 }
261 if (i == POLL_COUNT)
262 err("wrcodec: codec cmd pending expired!");
263
264 cmd = (u32)PSC_AC97CDC_INDX(addr);
265 cmd |= (u32)data;
266 au_writel(cmd, PSC_AC97CDC);
267 au_sync();
268
269 for (i = 0; i < POLL_COUNT; i++) {
270 val = au_readl(PSC_AC97STAT);
271 au_sync();
272 if (!(val & PSC_AC97STAT_CP))
273 break;
274 }
275 if (i == POLL_COUNT)
276 err("wrcodec: codec cmd pending expired!");
277
278 for (i = 0; i < POLL_COUNT; i++) {
279 val = au_readl(PSC_AC97EVNT);
280 au_sync();
281 if (val & PSC_AC97EVNT_CD)
282 break;
283 }
284 if (i == POLL_COUNT)
285 err("wrcodec: read cmdwait expired!");
286
287 /* Clear command done event.
288 */
289 au_writel(PSC_AC97EVNT_CD, PSC_AC97EVNT);
290 au_sync();
291
292 spin_unlock_irqrestore(&s->lock, flags);
293 }
294
295 static void
296 waitcodec(struct ac97_codec *codec)
297 {
298 u16 temp;
299 u32 val;
300 int i;
301
302 /* codec_wait is used to wait for a ready state after
303 * an AC97C_RESET.
304 */
305 au1550_delay(10);
306
307 /* first poll the CODEC_READY tag bit
308 */
309 for (i = 0; i < POLL_COUNT; i++) {
310 val = au_readl(PSC_AC97STAT);
311 au_sync();
312 if (val & PSC_AC97STAT_CR)
313 break;
314 }
315 if (i == POLL_COUNT) {
316 err("waitcodec: CODEC_READY poll expired!");
317 return;
318 }
319
320 /* get AC'97 powerdown control/status register
321 */
322 temp = rdcodec(codec, AC97_POWER_CONTROL);
323
324 /* If anything is powered down, power'em up
325 */
326 if (temp & 0x7f00) {
327 /* Power on
328 */
329 wrcodec(codec, AC97_POWER_CONTROL, 0);
330 au1550_delay(100);
331
332 /* Reread
333 */
334 temp = rdcodec(codec, AC97_POWER_CONTROL);
335 }
336
337 /* Check if Codec REF,ANL,DAC,ADC ready
338 */
339 if ((temp & 0x7f0f) != 0x000f)
340 err("codec reg 26 status (0x%x) not ready!!", temp);
341 }
342
343 /* stop the ADC before calling */
344 static void
345 set_adc_rate(struct au1550_state *s, unsigned rate)
346 {
347 struct dmabuf *adc = &s->dma_adc;
348 struct dmabuf *dac = &s->dma_dac;
349 unsigned adc_rate, dac_rate;
350 u16 ac97_extstat;
351
352 if (s->no_vra) {
353 /* calc SRC factor
354 */
355 adc->src_factor = ((96000 / rate) + 1) >> 1;
356 adc->sample_rate = 48000 / adc->src_factor;
357 return;
358 }
359
360 adc->src_factor = 1;
361
362 ac97_extstat = rdcodec(s->codec, AC97_EXTENDED_STATUS);
363
364 rate = rate > 48000 ? 48000 : rate;
365
366 /* enable VRA
367 */
368 wrcodec(s->codec, AC97_EXTENDED_STATUS,
369 ac97_extstat | AC97_EXTSTAT_VRA);
370
371 /* now write the sample rate
372 */
373 wrcodec(s->codec, AC97_PCM_LR_ADC_RATE, (u16) rate);
374
375 /* read it back for actual supported rate
376 */
377 adc_rate = rdcodec(s->codec, AC97_PCM_LR_ADC_RATE);
378
379 pr_debug("set_adc_rate: set to %d Hz\n", adc_rate);
380
381 /* some codec's don't allow unequal DAC and ADC rates, in which case
382 * writing one rate reg actually changes both.
383 */
384 dac_rate = rdcodec(s->codec, AC97_PCM_FRONT_DAC_RATE);
385 if (dac->num_channels > 2)
386 wrcodec(s->codec, AC97_PCM_SURR_DAC_RATE, dac_rate);
387 if (dac->num_channels > 4)
388 wrcodec(s->codec, AC97_PCM_LFE_DAC_RATE, dac_rate);
389
390 adc->sample_rate = adc_rate;
391 dac->sample_rate = dac_rate;
392 }
393
394 /* stop the DAC before calling */
395 static void
396 set_dac_rate(struct au1550_state *s, unsigned rate)
397 {
398 struct dmabuf *dac = &s->dma_dac;
399 struct dmabuf *adc = &s->dma_adc;
400 unsigned adc_rate, dac_rate;
401 u16 ac97_extstat;
402
403 if (s->no_vra) {
404 /* calc SRC factor
405 */
406 dac->src_factor = ((96000 / rate) + 1) >> 1;
407 dac->sample_rate = 48000 / dac->src_factor;
408 return;
409 }
410
411 dac->src_factor = 1;
412
413 ac97_extstat = rdcodec(s->codec, AC97_EXTENDED_STATUS);
414
415 rate = rate > 48000 ? 48000 : rate;
416
417 /* enable VRA
418 */
419 wrcodec(s->codec, AC97_EXTENDED_STATUS,
420 ac97_extstat | AC97_EXTSTAT_VRA);
421
422 /* now write the sample rate
423 */
424 wrcodec(s->codec, AC97_PCM_FRONT_DAC_RATE, (u16) rate);
425
426 /* I don't support different sample rates for multichannel,
427 * so make these channels the same.
428 */
429 if (dac->num_channels > 2)
430 wrcodec(s->codec, AC97_PCM_SURR_DAC_RATE, (u16) rate);
431 if (dac->num_channels > 4)
432 wrcodec(s->codec, AC97_PCM_LFE_DAC_RATE, (u16) rate);
433 /* read it back for actual supported rate
434 */
435 dac_rate = rdcodec(s->codec, AC97_PCM_FRONT_DAC_RATE);
436
437 pr_debug("set_dac_rate: set to %d Hz\n", dac_rate);
438
439 /* some codec's don't allow unequal DAC and ADC rates, in which case
440 * writing one rate reg actually changes both.
441 */
442 adc_rate = rdcodec(s->codec, AC97_PCM_LR_ADC_RATE);
443
444 dac->sample_rate = dac_rate;
445 adc->sample_rate = adc_rate;
446 }
447
448 static void
449 stop_dac(struct au1550_state *s)
450 {
451 struct dmabuf *db = &s->dma_dac;
452 u32 stat;
453 unsigned long flags;
454
455 if (db->stopped)
456 return;
457
458 spin_lock_irqsave(&s->lock, flags);
459
460 au_writel(PSC_AC97PCR_TP, PSC_AC97PCR);
461 au_sync();
462
463 /* Wait for Transmit Busy to show disabled.
464 */
465 do {
466 stat = readl((void *)PSC_AC97STAT);
467 au_sync();
468 } while ((stat & PSC_AC97STAT_TB) != 0);
469
470 au1xxx_dbdma_reset(db->dmanr);
471
472 db->stopped = 1;
473
474 spin_unlock_irqrestore(&s->lock, flags);
475 }
476
477 static void
478 stop_adc(struct au1550_state *s)
479 {
480 struct dmabuf *db = &s->dma_adc;
481 unsigned long flags;
482 u32 stat;
483
484 if (db->stopped)
485 return;
486
487 spin_lock_irqsave(&s->lock, flags);
488
489 au_writel(PSC_AC97PCR_RP, PSC_AC97PCR);
490 au_sync();
491
492 /* Wait for Receive Busy to show disabled.
493 */
494 do {
495 stat = readl((void *)PSC_AC97STAT);
496 au_sync();
497 } while ((stat & PSC_AC97STAT_RB) != 0);
498
499 au1xxx_dbdma_reset(db->dmanr);
500
501 db->stopped = 1;
502
503 spin_unlock_irqrestore(&s->lock, flags);
504 }
505
506
507 static void
508 set_xmit_slots(int num_channels)
509 {
510 u32 ac97_config, stat;
511
512 ac97_config = au_readl(PSC_AC97CFG);
513 au_sync();
514 ac97_config &= ~(PSC_AC97CFG_TXSLOT_MASK | PSC_AC97CFG_DE_ENABLE);
515 au_writel(ac97_config, PSC_AC97CFG);
516 au_sync();
517
518 switch (num_channels) {
519 case 6: /* stereo with surround and center/LFE,
520 * slots 3,4,6,7,8,9
521 */
522 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(6);
523 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(9);
524
525 case 4: /* stereo with surround, slots 3,4,7,8 */
526 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(7);
527 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(8);
528
529 case 2: /* stereo, slots 3,4 */
530 case 1: /* mono */
531 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(3);
532 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(4);
533 }
534
535 au_writel(ac97_config, PSC_AC97CFG);
536 au_sync();
537
538 ac97_config |= PSC_AC97CFG_DE_ENABLE;
539 au_writel(ac97_config, PSC_AC97CFG);
540 au_sync();
541
542 /* Wait for Device ready.
543 */
544 do {
545 stat = readl((void *)PSC_AC97STAT);
546 au_sync();
547 } while ((stat & PSC_AC97STAT_DR) == 0);
548 }
549
550 static void
551 set_recv_slots(int num_channels)
552 {
553 u32 ac97_config, stat;
554
555 ac97_config = au_readl(PSC_AC97CFG);
556 au_sync();
557 ac97_config &= ~(PSC_AC97CFG_RXSLOT_MASK | PSC_AC97CFG_DE_ENABLE);
558 au_writel(ac97_config, PSC_AC97CFG);
559 au_sync();
560
561 /* Always enable slots 3 and 4 (stereo). Slot 6 is
562 * optional Mic ADC, which we don't support yet.
563 */
564 ac97_config |= PSC_AC97CFG_RXSLOT_ENA(3);
565 ac97_config |= PSC_AC97CFG_RXSLOT_ENA(4);
566
567 au_writel(ac97_config, PSC_AC97CFG);
568 au_sync();
569
570 ac97_config |= PSC_AC97CFG_DE_ENABLE;
571 au_writel(ac97_config, PSC_AC97CFG);
572 au_sync();
573
574 /* Wait for Device ready.
575 */
576 do {
577 stat = readl((void *)PSC_AC97STAT);
578 au_sync();
579 } while ((stat & PSC_AC97STAT_DR) == 0);
580 }
581
582 static void
583 start_dac(struct au1550_state *s)
584 {
585 struct dmabuf *db = &s->dma_dac;
586 unsigned long flags;
587
588 if (!db->stopped)
589 return;
590
591 spin_lock_irqsave(&s->lock, flags);
592
593 set_xmit_slots(db->num_channels);
594 au_writel(PSC_AC97PCR_TC, PSC_AC97PCR);
595 au_sync();
596 au_writel(PSC_AC97PCR_TS, PSC_AC97PCR);
597 au_sync();
598
599 au1xxx_dbdma_start(db->dmanr);
600
601 db->stopped = 0;
602
603 spin_unlock_irqrestore(&s->lock, flags);
604 }
605
606 static void
607 start_adc(struct au1550_state *s)
608 {
609 struct dmabuf *db = &s->dma_adc;
610 int i;
611
612 if (!db->stopped)
613 return;
614
615 /* Put two buffers on the ring to get things started.
616 */
617 for (i=0; i<2; i++) {
618 au1xxx_dbdma_put_dest(db->dmanr, db->nextIn, db->dma_fragsize);
619
620 db->nextIn += db->dma_fragsize;
621 if (db->nextIn >= db->rawbuf + db->dmasize)
622 db->nextIn -= db->dmasize;
623 }
624
625 set_recv_slots(db->num_channels);
626 au1xxx_dbdma_start(db->dmanr);
627 au_writel(PSC_AC97PCR_RC, PSC_AC97PCR);
628 au_sync();
629 au_writel(PSC_AC97PCR_RS, PSC_AC97PCR);
630 au_sync();
631
632 db->stopped = 0;
633 }
634
635 static int
636 prog_dmabuf(struct au1550_state *s, struct dmabuf *db)
637 {
638 unsigned user_bytes_per_sec;
639 unsigned bufs;
640 unsigned rate = db->sample_rate;
641
642 if (!db->rawbuf) {
643 db->ready = db->mapped = 0;
644 db->buforder = 5; /* 32 * PAGE_SIZE */
645 db->rawbuf = kmalloc((PAGE_SIZE << db->buforder), GFP_KERNEL);
646 if (!db->rawbuf)
647 return -ENOMEM;
648 }
649
650 db->cnt_factor = 1;
651 if (db->sample_size == 8)
652 db->cnt_factor *= 2;
653 if (db->num_channels == 1)
654 db->cnt_factor *= 2;
655 db->cnt_factor *= db->src_factor;
656
657 db->count = 0;
658 db->dma_qcount = 0;
659 db->nextIn = db->nextOut = db->rawbuf;
660
661 db->user_bytes_per_sample = (db->sample_size>>3) * db->num_channels;
662 db->dma_bytes_per_sample = 2 * ((db->num_channels == 1) ?
663 2 : db->num_channels);
664
665 user_bytes_per_sec = rate * db->user_bytes_per_sample;
666 bufs = PAGE_SIZE << db->buforder;
667 if (db->ossfragshift) {
668 if ((1000 << db->ossfragshift) < user_bytes_per_sec)
669 db->fragshift = ld2(user_bytes_per_sec/1000);
670 else
671 db->fragshift = db->ossfragshift;
672 } else {
673 db->fragshift = ld2(user_bytes_per_sec / 100 /
674 (db->subdivision ? db->subdivision : 1));
675 if (db->fragshift < 3)
676 db->fragshift = 3;
677 }
678
679 db->fragsize = 1 << db->fragshift;
680 db->dma_fragsize = db->fragsize * db->cnt_factor;
681 db->numfrag = bufs / db->dma_fragsize;
682
683 while (db->numfrag < 4 && db->fragshift > 3) {
684 db->fragshift--;
685 db->fragsize = 1 << db->fragshift;
686 db->dma_fragsize = db->fragsize * db->cnt_factor;
687 db->numfrag = bufs / db->dma_fragsize;
688 }
689
690 if (db->ossmaxfrags >= 4 && db->ossmaxfrags < db->numfrag)
691 db->numfrag = db->ossmaxfrags;
692
693 db->dmasize = db->dma_fragsize * db->numfrag;
694 memset(db->rawbuf, 0, bufs);
695
696 pr_debug("prog_dmabuf: rate=%d, samplesize=%d, channels=%d\n",
697 rate, db->sample_size, db->num_channels);
698 pr_debug("prog_dmabuf: fragsize=%d, cnt_factor=%d, dma_fragsize=%d\n",
699 db->fragsize, db->cnt_factor, db->dma_fragsize);
700 pr_debug("prog_dmabuf: numfrag=%d, dmasize=%d\n", db->numfrag, db->dmasize);
701
702 db->ready = 1;
703 return 0;
704 }
705
706 static int
707 prog_dmabuf_adc(struct au1550_state *s)
708 {
709 stop_adc(s);
710 return prog_dmabuf(s, &s->dma_adc);
711
712 }
713
714 static int
715 prog_dmabuf_dac(struct au1550_state *s)
716 {
717 stop_dac(s);
718 return prog_dmabuf(s, &s->dma_dac);
719 }
720
721
722 /* hold spinlock for the following */
723 static void
724 dac_dma_interrupt(int irq, void *dev_id, struct pt_regs *regs)
725 {
726 struct au1550_state *s = (struct au1550_state *) dev_id;
727 struct dmabuf *db = &s->dma_dac;
728 u32 ac97c_stat;
729
730 ac97c_stat = au_readl(PSC_AC97STAT);
731 if (ac97c_stat & (AC97C_XU | AC97C_XO | AC97C_TE))
732 pr_debug("AC97C status = 0x%08x\n", ac97c_stat);
733 db->dma_qcount--;
734
735 if (db->count >= db->fragsize) {
736 if (au1xxx_dbdma_put_source(db->dmanr, db->nextOut,
737 db->fragsize) == 0) {
738 err("qcount < 2 and no ring room!");
739 }
740 db->nextOut += db->fragsize;
741 if (db->nextOut >= db->rawbuf + db->dmasize)
742 db->nextOut -= db->dmasize;
743 db->count -= db->fragsize;
744 db->total_bytes += db->dma_fragsize;
745 db->dma_qcount++;
746 }
747
748 /* wake up anybody listening */
749 if (waitqueue_active(&db->wait))
750 wake_up(&db->wait);
751 }
752
753
754 static void
755 adc_dma_interrupt(int irq, void *dev_id, struct pt_regs *regs)
756 {
757 struct au1550_state *s = (struct au1550_state *)dev_id;
758 struct dmabuf *dp = &s->dma_adc;
759 u32 obytes;
760 char *obuf;
761
762 /* Pull the buffer from the dma queue.
763 */
764 au1xxx_dbdma_get_dest(dp->dmanr, (void *)(&obuf), &obytes);
765
766 if ((dp->count + obytes) > dp->dmasize) {
767 /* Overrun. Stop ADC and log the error
768 */
769 stop_adc(s);
770 dp->error++;
771 err("adc overrun");
772 return;
773 }
774
775 /* Put a new empty buffer on the destination DMA.
776 */
777 au1xxx_dbdma_put_dest(dp->dmanr, dp->nextIn, dp->dma_fragsize);
778
779 dp->nextIn += dp->dma_fragsize;
780 if (dp->nextIn >= dp->rawbuf + dp->dmasize)
781 dp->nextIn -= dp->dmasize;
782
783 dp->count += obytes;
784 dp->total_bytes += obytes;
785
786 /* wake up anybody listening
787 */
788 if (waitqueue_active(&dp->wait))
789 wake_up(&dp->wait);
790
791 }
792
793 static loff_t
794 au1550_llseek(struct file *file, loff_t offset, int origin)
795 {
796 return -ESPIPE;
797 }
798
799
800 static int
801 au1550_open_mixdev(struct inode *inode, struct file *file)
802 {
803 file->private_data = &au1550_state;
804 return 0;
805 }
806
807 static int
808 au1550_release_mixdev(struct inode *inode, struct file *file)
809 {
810 return 0;
811 }
812
813 static int
814 mixdev_ioctl(struct ac97_codec *codec, unsigned int cmd,
815 unsigned long arg)
816 {
817 return codec->mixer_ioctl(codec, cmd, arg);
818 }
819
820 static int
821 au1550_ioctl_mixdev(struct inode *inode, struct file *file,
822 unsigned int cmd, unsigned long arg)
823 {
824 struct au1550_state *s = (struct au1550_state *)file->private_data;
825 struct ac97_codec *codec = s->codec;
826
827 return mixdev_ioctl(codec, cmd, arg);
828 }
829
830 static /*const */ struct file_operations au1550_mixer_fops = {
831 owner:THIS_MODULE,
832 llseek:au1550_llseek,
833 ioctl:au1550_ioctl_mixdev,
834 open:au1550_open_mixdev,
835 release:au1550_release_mixdev,
836 };
837
838 static int
839 drain_dac(struct au1550_state *s, int nonblock)
840 {
841 unsigned long flags;
842 int count, tmo;
843
844 if (s->dma_dac.mapped || !s->dma_dac.ready || s->dma_dac.stopped)
845 return 0;
846
847 for (;;) {
848 spin_lock_irqsave(&s->lock, flags);
849 count = s->dma_dac.count;
850 spin_unlock_irqrestore(&s->lock, flags);
851 if (count <= s->dma_dac.fragsize)
852 break;
853 if (signal_pending(current))
854 break;
855 if (nonblock)
856 return -EBUSY;
857 tmo = 1000 * count / (s->no_vra ?
858 48000 : s->dma_dac.sample_rate);
859 tmo /= s->dma_dac.dma_bytes_per_sample;
860 au1550_delay(tmo);
861 }
862 if (signal_pending(current))
863 return -ERESTARTSYS;
864 return 0;
865 }
866
867 static inline u8 S16_TO_U8(s16 ch)
868 {
869 return (u8) (ch >> 8) + 0x80;
870 }
871 static inline s16 U8_TO_S16(u8 ch)
872 {
873 return (s16) (ch - 0x80) << 8;
874 }
875
876 /*
877 * Translates user samples to dma buffer suitable for AC'97 DAC data:
878 * If mono, copy left channel to right channel in dma buffer.
879 * If 8 bit samples, cvt to 16-bit before writing to dma buffer.
880 * If interpolating (no VRA), duplicate every audio frame src_factor times.
881 */
882 static int
883 translate_from_user(struct dmabuf *db, char* dmabuf, char* userbuf,
884 int dmacount)
885 {
886 int sample, i;
887 int interp_bytes_per_sample;
888 int num_samples;
889 int mono = (db->num_channels == 1);
890 char usersample[12];
891 s16 ch, dmasample[6];
892
893 if (db->sample_size == 16 && !mono && db->src_factor == 1) {
894 /* no translation necessary, just copy
895 */
896 if (copy_from_user(dmabuf, userbuf, dmacount))
897 return -EFAULT;
898 return dmacount;
899 }
900
901 interp_bytes_per_sample = db->dma_bytes_per_sample * db->src_factor;
902 num_samples = dmacount / interp_bytes_per_sample;
903
904 for (sample = 0; sample < num_samples; sample++) {
905 if (copy_from_user(usersample, userbuf,
906 db->user_bytes_per_sample)) {
907 return -EFAULT;
908 }
909
910 for (i = 0; i < db->num_channels; i++) {
911 if (db->sample_size == 8)
912 ch = U8_TO_S16(usersample[i]);
913 else
914 ch = *((s16 *) (&usersample[i * 2]));
915 dmasample[i] = ch;
916 if (mono)
917 dmasample[i + 1] = ch; /* right channel */
918 }
919
920 /* duplicate every audio frame src_factor times
921 */
922 for (i = 0; i < db->src_factor; i++)
923 memcpy(dmabuf, dmasample, db->dma_bytes_per_sample);
924
925 userbuf += db->user_bytes_per_sample;
926 dmabuf += interp_bytes_per_sample;
927 }
928
929 return num_samples * interp_bytes_per_sample;
930 }
931
932 /*
933 * Translates AC'97 ADC samples to user buffer:
934 * If mono, send only left channel to user buffer.
935 * If 8 bit samples, cvt from 16 to 8 bit before writing to user buffer.
936 * If decimating (no VRA), skip over src_factor audio frames.
937 */
938 static int
939 translate_to_user(struct dmabuf *db, char* userbuf, char* dmabuf,
940 int dmacount)
941 {
942 int sample, i;
943 int interp_bytes_per_sample;
944 int num_samples;
945 int mono = (db->num_channels == 1);
946 char usersample[12];
947
948 if (db->sample_size == 16 && !mono && db->src_factor == 1) {
949 /* no translation necessary, just copy
950 */
951 if (copy_to_user(userbuf, dmabuf, dmacount))
952 return -EFAULT;
953 return dmacount;
954 }
955
956 interp_bytes_per_sample = db->dma_bytes_per_sample * db->src_factor;
957 num_samples = dmacount / interp_bytes_per_sample;
958
959 for (sample = 0; sample < num_samples; sample++) {
960 for (i = 0; i < db->num_channels; i++) {
961 if (db->sample_size == 8)
962 usersample[i] =
963 S16_TO_U8(*((s16 *) (&dmabuf[i * 2])));
964 else
965 *((s16 *) (&usersample[i * 2])) =
966 *((s16 *) (&dmabuf[i * 2]));
967 }
968
969 if (copy_to_user(userbuf, usersample,
970 db->user_bytes_per_sample)) {
971 return -EFAULT;
972 }
973
974 userbuf += db->user_bytes_per_sample;
975 dmabuf += interp_bytes_per_sample;
976 }
977
978 return num_samples * interp_bytes_per_sample;
979 }
980
981 /*
982 * Copy audio data to/from user buffer from/to dma buffer, taking care
983 * that we wrap when reading/writing the dma buffer. Returns actual byte
984 * count written to or read from the dma buffer.
985 */
986 static int
987 copy_dmabuf_user(struct dmabuf *db, char* userbuf, int count, int to_user)
988 {
989 char *bufptr = to_user ? db->nextOut : db->nextIn;
990 char *bufend = db->rawbuf + db->dmasize;
991 int cnt, ret;
992
993 if (bufptr + count > bufend) {
994 int partial = (int) (bufend - bufptr);
995 if (to_user) {
996 if ((cnt = translate_to_user(db, userbuf,
997 bufptr, partial)) < 0)
998 return cnt;
999 ret = cnt;
1000 if ((cnt = translate_to_user(db, userbuf + partial,
1001 db->rawbuf,
1002 count - partial)) < 0)
1003 return cnt;
1004 ret += cnt;
1005 } else {
1006 if ((cnt = translate_from_user(db, bufptr, userbuf,
1007 partial)) < 0)
1008 return cnt;
1009 ret = cnt;
1010 if ((cnt = translate_from_user(db, db->rawbuf,
1011 userbuf + partial,
1012 count - partial)) < 0)
1013 return cnt;
1014 ret += cnt;
1015 }
1016 } else {
1017 if (to_user)
1018 ret = translate_to_user(db, userbuf, bufptr, count);
1019 else
1020 ret = translate_from_user(db, bufptr, userbuf, count);
1021 }
1022
1023 return ret;
1024 }
1025
1026
1027 static ssize_t
1028 au1550_read(struct file *file, char *buffer, size_t count, loff_t *ppos)
1029 {
1030 struct au1550_state *s = (struct au1550_state *)file->private_data;
1031 struct dmabuf *db = &s->dma_adc;
1032 DECLARE_WAITQUEUE(wait, current);
1033 ssize_t ret;
1034 unsigned long flags;
1035 int cnt, usercnt, avail;
1036
1037 if (db->mapped)
1038 return -ENXIO;
1039 if (!access_ok(VERIFY_WRITE, buffer, count))
1040 return -EFAULT;
1041 ret = 0;
1042
1043 count *= db->cnt_factor;
1044
1045 down(&s->sem);
1046 add_wait_queue(&db->wait, &wait);
1047
1048 while (count > 0) {
1049 /* wait for samples in ADC dma buffer
1050 */
1051 do {
1052 if (db->stopped)
1053 start_adc(s);
1054 spin_lock_irqsave(&s->lock, flags);
1055 avail = db->count;
1056 if (avail <= 0)
1057 __set_current_state(TASK_INTERRUPTIBLE);
1058 spin_unlock_irqrestore(&s->lock, flags);
1059 if (avail <= 0) {
1060 if (file->f_flags & O_NONBLOCK) {
1061 if (!ret)
1062 ret = -EAGAIN;
1063 goto out;
1064 }
1065 up(&s->sem);
1066 schedule();
1067 if (signal_pending(current)) {
1068 if (!ret)
1069 ret = -ERESTARTSYS;
1070 goto out2;
1071 }
1072 down(&s->sem);
1073 }
1074 } while (avail <= 0);
1075
1076 /* copy from nextOut to user
1077 */
1078 if ((cnt = copy_dmabuf_user(db, buffer,
1079 count > avail ?
1080 avail : count, 1)) < 0) {
1081 if (!ret)
1082 ret = -EFAULT;
1083 goto out;
1084 }
1085
1086 spin_lock_irqsave(&s->lock, flags);
1087 db->count -= cnt;
1088 db->nextOut += cnt;
1089 if (db->nextOut >= db->rawbuf + db->dmasize)
1090 db->nextOut -= db->dmasize;
1091 spin_unlock_irqrestore(&s->lock, flags);
1092
1093 count -= cnt;
1094 usercnt = cnt / db->cnt_factor;
1095 buffer += usercnt;
1096 ret += usercnt;
1097 } /* while (count > 0) */
1098
1099 out:
1100 up(&s->sem);
1101 out2:
1102 remove_wait_queue(&db->wait, &wait);
1103 set_current_state(TASK_RUNNING);
1104 return ret;
1105 }
1106
1107 static ssize_t
1108 au1550_write(struct file *file, const char *buffer, size_t count, loff_t * ppos)
1109 {
1110 struct au1550_state *s = (struct au1550_state *)file->private_data;
1111 struct dmabuf *db = &s->dma_dac;
1112 DECLARE_WAITQUEUE(wait, current);
1113 ssize_t ret = 0;
1114 unsigned long flags;
1115 int cnt, usercnt, avail;
1116
1117 pr_debug("write: count=%d\n", count);
1118
1119 if (db->mapped)
1120 return -ENXIO;
1121 if (!access_ok(VERIFY_READ, buffer, count))
1122 return -EFAULT;
1123
1124 count *= db->cnt_factor;
1125
1126 down(&s->sem);
1127 add_wait_queue(&db->wait, &wait);
1128
1129 while (count > 0) {
1130 /* wait for space in playback buffer
1131 */
1132 do {
1133 spin_lock_irqsave(&s->lock, flags);
1134 avail = (int) db->dmasize - db->count;
1135 if (avail <= 0)
1136 __set_current_state(TASK_INTERRUPTIBLE);
1137 spin_unlock_irqrestore(&s->lock, flags);
1138 if (avail <= 0) {
1139 if (file->f_flags & O_NONBLOCK) {
1140 if (!ret)
1141 ret = -EAGAIN;
1142 goto out;
1143 }
1144 up(&s->sem);
1145 schedule();
1146 if (signal_pending(current)) {
1147 if (!ret)
1148 ret = -ERESTARTSYS;
1149 goto out2;
1150 }
1151 down(&s->sem);
1152 }
1153 } while (avail <= 0);
1154
1155 /* copy from user to nextIn
1156 */
1157 if ((cnt = copy_dmabuf_user(db, (char *) buffer,
1158 count > avail ?
1159 avail : count, 0)) < 0) {
1160 if (!ret)
1161 ret = -EFAULT;
1162 goto out;
1163 }
1164
1165 spin_lock_irqsave(&s->lock, flags);
1166 db->count += cnt;
1167 db->nextIn += cnt;
1168 if (db->nextIn >= db->rawbuf + db->dmasize)
1169 db->nextIn -= db->dmasize;
1170
1171 /* If the data is available, we want to keep two buffers
1172 * on the dma queue. If the queue count reaches zero,
1173 * we know the dma has stopped.
1174 */
1175 while ((db->dma_qcount < 2) && (db->count >= db->fragsize)) {
1176 if (au1xxx_dbdma_put_source(db->dmanr, db->nextOut,
1177 db->fragsize) == 0) {
1178 err("qcount < 2 and no ring room!");
1179 }
1180 db->nextOut += db->fragsize;
1181 if (db->nextOut >= db->rawbuf + db->dmasize)
1182 db->nextOut -= db->dmasize;
1183 db->total_bytes += db->dma_fragsize;
1184 if (db->dma_qcount == 0)
1185 start_dac(s);
1186 db->dma_qcount++;
1187 }
1188 spin_unlock_irqrestore(&s->lock, flags);
1189
1190 count -= cnt;
1191 usercnt = cnt / db->cnt_factor;
1192 buffer += usercnt;
1193 ret += usercnt;
1194 } /* while (count > 0) */
1195
1196 out:
1197 up(&s->sem);
1198 out2:
1199 remove_wait_queue(&db->wait, &wait);
1200 set_current_state(TASK_RUNNING);
1201 return ret;
1202 }
1203
1204
1205 /* No kernel lock - we have our own spinlock */
1206 static unsigned int
1207 au1550_poll(struct file *file, struct poll_table_struct *wait)
1208 {
1209 struct au1550_state *s = (struct au1550_state *)file->private_data;
1210 unsigned long flags;
1211 unsigned int mask = 0;
1212
1213 if (file->f_mode & FMODE_WRITE) {
1214 if (!s->dma_dac.ready)
1215 return 0;
1216 poll_wait(file, &s->dma_dac.wait, wait);
1217 }
1218 if (file->f_mode & FMODE_READ) {
1219 if (!s->dma_adc.ready)
1220 return 0;
1221 poll_wait(file, &s->dma_adc.wait, wait);
1222 }
1223
1224 spin_lock_irqsave(&s->lock, flags);
1225
1226 if (file->f_mode & FMODE_READ) {
1227 if (s->dma_adc.count >= (signed)s->dma_adc.dma_fragsize)
1228 mask |= POLLIN | POLLRDNORM;
1229 }
1230 if (file->f_mode & FMODE_WRITE) {
1231 if (s->dma_dac.mapped) {
1232 if (s->dma_dac.count >=
1233 (signed)s->dma_dac.dma_fragsize)
1234 mask |= POLLOUT | POLLWRNORM;
1235 } else {
1236 if ((signed) s->dma_dac.dmasize >=
1237 s->dma_dac.count + (signed)s->dma_dac.dma_fragsize)
1238 mask |= POLLOUT | POLLWRNORM;
1239 }
1240 }
1241 spin_unlock_irqrestore(&s->lock, flags);
1242 return mask;
1243 }
1244
1245 static int
1246 au1550_mmap(struct file *file, struct vm_area_struct *vma)
1247 {
1248 struct au1550_state *s = (struct au1550_state *)file->private_data;
1249 struct dmabuf *db;
1250 unsigned long size;
1251 int ret = 0;
1252
1253 lock_kernel();
1254 down(&s->sem);
1255 if (vma->vm_flags & VM_WRITE)
1256 db = &s->dma_dac;
1257 else if (vma->vm_flags & VM_READ)
1258 db = &s->dma_adc;
1259 else {
1260 ret = -EINVAL;
1261 goto out;
1262 }
1263 if (vma->vm_pgoff != 0) {
1264 ret = -EINVAL;
1265 goto out;
1266 }
1267 size = vma->vm_end - vma->vm_start;
1268 if (size > (PAGE_SIZE << db->buforder)) {
1269 ret = -EINVAL;
1270 goto out;
1271 }
1272 if (remap_pfn_range(vma, vma->vm_start, page_to_pfn(virt_to_page(db->rawbuf)),
1273 size, vma->vm_page_prot)) {
1274 ret = -EAGAIN;
1275 goto out;
1276 }
1277 vma->vm_flags &= ~VM_IO;
1278 db->mapped = 1;
1279 out:
1280 up(&s->sem);
1281 unlock_kernel();
1282 return ret;
1283 }
1284
1285 #ifdef DEBUG
1286 static struct ioctl_str_t {
1287 unsigned int cmd;
1288 const char *str;
1289 } ioctl_str[] = {
1290 {SNDCTL_DSP_RESET, "SNDCTL_DSP_RESET"},
1291 {SNDCTL_DSP_SYNC, "SNDCTL_DSP_SYNC"},
1292 {SNDCTL_DSP_SPEED, "SNDCTL_DSP_SPEED"},
1293 {SNDCTL_DSP_STEREO, "SNDCTL_DSP_STEREO"},
1294 {SNDCTL_DSP_GETBLKSIZE, "SNDCTL_DSP_GETBLKSIZE"},
1295 {SNDCTL_DSP_SAMPLESIZE, "SNDCTL_DSP_SAMPLESIZE"},
1296 {SNDCTL_DSP_CHANNELS, "SNDCTL_DSP_CHANNELS"},
1297 {SOUND_PCM_WRITE_CHANNELS, "SOUND_PCM_WRITE_CHANNELS"},
1298 {SOUND_PCM_WRITE_FILTER, "SOUND_PCM_WRITE_FILTER"},
1299 {SNDCTL_DSP_POST, "SNDCTL_DSP_POST"},
1300 {SNDCTL_DSP_SUBDIVIDE, "SNDCTL_DSP_SUBDIVIDE"},
1301 {SNDCTL_DSP_SETFRAGMENT, "SNDCTL_DSP_SETFRAGMENT"},
1302 {SNDCTL_DSP_GETFMTS, "SNDCTL_DSP_GETFMTS"},
1303 {SNDCTL_DSP_SETFMT, "SNDCTL_DSP_SETFMT"},
1304 {SNDCTL_DSP_GETOSPACE, "SNDCTL_DSP_GETOSPACE"},
1305 {SNDCTL_DSP_GETISPACE, "SNDCTL_DSP_GETISPACE"},
1306 {SNDCTL_DSP_NONBLOCK, "SNDCTL_DSP_NONBLOCK"},
1307 {SNDCTL_DSP_GETCAPS, "SNDCTL_DSP_GETCAPS"},
1308 {SNDCTL_DSP_GETTRIGGER, "SNDCTL_DSP_GETTRIGGER"},
1309 {SNDCTL_DSP_SETTRIGGER, "SNDCTL_DSP_SETTRIGGER"},
1310 {SNDCTL_DSP_GETIPTR, "SNDCTL_DSP_GETIPTR"},
1311 {SNDCTL_DSP_GETOPTR, "SNDCTL_DSP_GETOPTR"},
1312 {SNDCTL_DSP_MAPINBUF, "SNDCTL_DSP_MAPINBUF"},
1313 {SNDCTL_DSP_MAPOUTBUF, "SNDCTL_DSP_MAPOUTBUF"},
1314 {SNDCTL_DSP_SETSYNCRO, "SNDCTL_DSP_SETSYNCRO"},
1315 {SNDCTL_DSP_SETDUPLEX, "SNDCTL_DSP_SETDUPLEX"},
1316 {SNDCTL_DSP_GETODELAY, "SNDCTL_DSP_GETODELAY"},
1317 {SNDCTL_DSP_GETCHANNELMASK, "SNDCTL_DSP_GETCHANNELMASK"},
1318 {SNDCTL_DSP_BIND_CHANNEL, "SNDCTL_DSP_BIND_CHANNEL"},
1319 {OSS_GETVERSION, "OSS_GETVERSION"},
1320 {SOUND_PCM_READ_RATE, "SOUND_PCM_READ_RATE"},
1321 {SOUND_PCM_READ_CHANNELS, "SOUND_PCM_READ_CHANNELS"},
1322 {SOUND_PCM_READ_BITS, "SOUND_PCM_READ_BITS"},
1323 {SOUND_PCM_READ_FILTER, "SOUND_PCM_READ_FILTER"}
1324 };
1325 #endif
1326
1327 static int
1328 dma_count_done(struct dmabuf *db)
1329 {
1330 if (db->stopped)
1331 return 0;
1332
1333 return db->dma_fragsize - au1xxx_get_dma_residue(db->dmanr);
1334 }
1335
1336
1337 static int
1338 au1550_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
1339 unsigned long arg)
1340 {
1341 struct au1550_state *s = (struct au1550_state *)file->private_data;
1342 unsigned long flags;
1343 audio_buf_info abinfo;
1344 count_info cinfo;
1345 int count;
1346 int val, mapped, ret, diff;
1347
1348 mapped = ((file->f_mode & FMODE_WRITE) && s->dma_dac.mapped) ||
1349 ((file->f_mode & FMODE_READ) && s->dma_adc.mapped);
1350
1351 #ifdef DEBUG
1352 for (count=0; count<sizeof(ioctl_str)/sizeof(ioctl_str[0]); count++) {
1353 if (ioctl_str[count].cmd == cmd)
1354 break;
1355 }
1356 if (count < sizeof(ioctl_str) / sizeof(ioctl_str[0]))
1357 pr_debug("ioctl %s, arg=0x%lxn", ioctl_str[count].str, arg);
1358 else
1359 pr_debug("ioctl 0x%x unknown, arg=0x%lx\n", cmd, arg);
1360 #endif
1361
1362 switch (cmd) {
1363 case OSS_GETVERSION:
1364 return put_user(SOUND_VERSION, (int *) arg);
1365
1366 case SNDCTL_DSP_SYNC:
1367 if (file->f_mode & FMODE_WRITE)
1368 return drain_dac(s, file->f_flags & O_NONBLOCK);
1369 return 0;
1370
1371 case SNDCTL_DSP_SETDUPLEX:
1372 return 0;
1373
1374 case SNDCTL_DSP_GETCAPS:
1375 return put_user(DSP_CAP_DUPLEX | DSP_CAP_REALTIME |
1376 DSP_CAP_TRIGGER | DSP_CAP_MMAP, (int *)arg);
1377
1378 case SNDCTL_DSP_RESET:
1379 if (file->f_mode & FMODE_WRITE) {
1380 stop_dac(s);
1381 synchronize_irq();
1382 s->dma_dac.count = s->dma_dac.total_bytes = 0;
1383 s->dma_dac.nextIn = s->dma_dac.nextOut =
1384 s->dma_dac.rawbuf;
1385 }
1386 if (file->f_mode & FMODE_READ) {
1387 stop_adc(s);
1388 synchronize_irq();
1389 s->dma_adc.count = s->dma_adc.total_bytes = 0;
1390 s->dma_adc.nextIn = s->dma_adc.nextOut =
1391 s->dma_adc.rawbuf;
1392 }
1393 return 0;
1394
1395 case SNDCTL_DSP_SPEED:
1396 if (get_user(val, (int *) arg))
1397 return -EFAULT;
1398 if (val >= 0) {
1399 if (file->f_mode & FMODE_READ) {
1400 stop_adc(s);
1401 set_adc_rate(s, val);
1402 }
1403 if (file->f_mode & FMODE_WRITE) {
1404 stop_dac(s);
1405 set_dac_rate(s, val);
1406 }
1407 if (s->open_mode & FMODE_READ)
1408 if ((ret = prog_dmabuf_adc(s)))
1409 return ret;
1410 if (s->open_mode & FMODE_WRITE)
1411 if ((ret = prog_dmabuf_dac(s)))
1412 return ret;
1413 }
1414 return put_user((file->f_mode & FMODE_READ) ?
1415 s->dma_adc.sample_rate :
1416 s->dma_dac.sample_rate,
1417 (int *)arg);
1418
1419 case SNDCTL_DSP_STEREO:
1420 if (get_user(val, (int *) arg))
1421 return -EFAULT;
1422 if (file->f_mode & FMODE_READ) {
1423 stop_adc(s);
1424 s->dma_adc.num_channels = val ? 2 : 1;
1425 if ((ret = prog_dmabuf_adc(s)))
1426 return ret;
1427 }
1428 if (file->f_mode & FMODE_WRITE) {
1429 stop_dac(s);
1430 s->dma_dac.num_channels = val ? 2 : 1;
1431 if (s->codec_ext_caps & AC97_EXT_DACS) {
1432 /* disable surround and center/lfe in AC'97
1433 */
1434 u16 ext_stat = rdcodec(s->codec,
1435 AC97_EXTENDED_STATUS);
1436 wrcodec(s->codec, AC97_EXTENDED_STATUS,
1437 ext_stat | (AC97_EXTSTAT_PRI |
1438 AC97_EXTSTAT_PRJ |
1439 AC97_EXTSTAT_PRK));
1440 }
1441 if ((ret = prog_dmabuf_dac(s)))
1442 return ret;
1443 }
1444 return 0;
1445
1446 case SNDCTL_DSP_CHANNELS:
1447 if (get_user(val, (int *) arg))
1448 return -EFAULT;
1449 if (val != 0) {
1450 if (file->f_mode & FMODE_READ) {
1451 if (val < 0 || val > 2)
1452 return -EINVAL;
1453 stop_adc(s);
1454 s->dma_adc.num_channels = val;
1455 if ((ret = prog_dmabuf_adc(s)))
1456 return ret;
1457 }
1458 if (file->f_mode & FMODE_WRITE) {
1459 switch (val) {
1460 case 1:
1461 case 2:
1462 break;
1463 case 3:
1464 case 5:
1465 return -EINVAL;
1466 case 4:
1467 if (!(s->codec_ext_caps &
1468 AC97_EXTID_SDAC))
1469 return -EINVAL;
1470 break;
1471 case 6:
1472 if ((s->codec_ext_caps &
1473 AC97_EXT_DACS) != AC97_EXT_DACS)
1474 return -EINVAL;
1475 break;
1476 default:
1477 return -EINVAL;
1478 }
1479
1480 stop_dac(s);
1481 if (val <= 2 &&
1482 (s->codec_ext_caps & AC97_EXT_DACS)) {
1483 /* disable surround and center/lfe
1484 * channels in AC'97
1485 */
1486 u16 ext_stat =
1487 rdcodec(s->codec,
1488 AC97_EXTENDED_STATUS);
1489 wrcodec(s->codec,
1490 AC97_EXTENDED_STATUS,
1491 ext_stat | (AC97_EXTSTAT_PRI |
1492 AC97_EXTSTAT_PRJ |
1493 AC97_EXTSTAT_PRK));
1494 } else if (val >= 4) {
1495 /* enable surround, center/lfe
1496 * channels in AC'97
1497 */
1498 u16 ext_stat =
1499 rdcodec(s->codec,
1500 AC97_EXTENDED_STATUS);
1501 ext_stat &= ~AC97_EXTSTAT_PRJ;
1502 if (val == 6)
1503 ext_stat &=
1504 ~(AC97_EXTSTAT_PRI |
1505 AC97_EXTSTAT_PRK);
1506 wrcodec(s->codec,
1507 AC97_EXTENDED_STATUS,
1508 ext_stat);
1509 }
1510
1511 s->dma_dac.num_channels = val;
1512 if ((ret = prog_dmabuf_dac(s)))
1513 return ret;
1514 }
1515 }
1516 return put_user(val, (int *) arg);
1517
1518 case SNDCTL_DSP_GETFMTS: /* Returns a mask */
1519 return put_user(AFMT_S16_LE | AFMT_U8, (int *) arg);
1520
1521 case SNDCTL_DSP_SETFMT: /* Selects ONE fmt */
1522 if (get_user(val, (int *) arg))
1523 return -EFAULT;
1524 if (val != AFMT_QUERY) {
1525 if (file->f_mode & FMODE_READ) {
1526 stop_adc(s);
1527 if (val == AFMT_S16_LE)
1528 s->dma_adc.sample_size = 16;
1529 else {
1530 val = AFMT_U8;
1531 s->dma_adc.sample_size = 8;
1532 }
1533 if ((ret = prog_dmabuf_adc(s)))
1534 return ret;
1535 }
1536 if (file->f_mode & FMODE_WRITE) {
1537 stop_dac(s);
1538 if (val == AFMT_S16_LE)
1539 s->dma_dac.sample_size = 16;
1540 else {
1541 val = AFMT_U8;
1542 s->dma_dac.sample_size = 8;
1543 }
1544 if ((ret = prog_dmabuf_dac(s)))
1545 return ret;
1546 }
1547 } else {
1548 if (file->f_mode & FMODE_READ)
1549 val = (s->dma_adc.sample_size == 16) ?
1550 AFMT_S16_LE : AFMT_U8;
1551 else
1552 val = (s->dma_dac.sample_size == 16) ?
1553 AFMT_S16_LE : AFMT_U8;
1554 }
1555 return put_user(val, (int *) arg);
1556
1557 case SNDCTL_DSP_POST:
1558 return 0;
1559
1560 case SNDCTL_DSP_GETTRIGGER:
1561 val = 0;
1562 spin_lock_irqsave(&s->lock, flags);
1563 if (file->f_mode & FMODE_READ && !s->dma_adc.stopped)
1564 val |= PCM_ENABLE_INPUT;
1565 if (file->f_mode & FMODE_WRITE && !s->dma_dac.stopped)
1566 val |= PCM_ENABLE_OUTPUT;
1567 spin_unlock_irqrestore(&s->lock, flags);
1568 return put_user(val, (int *) arg);
1569
1570 case SNDCTL_DSP_SETTRIGGER:
1571 if (get_user(val, (int *) arg))
1572 return -EFAULT;
1573 if (file->f_mode & FMODE_READ) {
1574 if (val & PCM_ENABLE_INPUT)
1575 start_adc(s);
1576 else
1577 stop_adc(s);
1578 }
1579 if (file->f_mode & FMODE_WRITE) {
1580 if (val & PCM_ENABLE_OUTPUT)
1581 start_dac(s);
1582 else
1583 stop_dac(s);
1584 }
1585 return 0;
1586
1587 case SNDCTL_DSP_GETOSPACE:
1588 if (!(file->f_mode & FMODE_WRITE))
1589 return -EINVAL;
1590 abinfo.fragsize = s->dma_dac.fragsize;
1591 spin_lock_irqsave(&s->lock, flags);
1592 count = s->dma_dac.count;
1593 count -= dma_count_done(&s->dma_dac);
1594 spin_unlock_irqrestore(&s->lock, flags);
1595 if (count < 0)
1596 count = 0;
1597 abinfo.bytes = (s->dma_dac.dmasize - count) /
1598 s->dma_dac.cnt_factor;
1599 abinfo.fragstotal = s->dma_dac.numfrag;
1600 abinfo.fragments = abinfo.bytes >> s->dma_dac.fragshift;
1601 pr_debug("ioctl SNDCTL_DSP_GETOSPACE: bytes=%d, fragments=%d\n", abinfo.bytes, abinfo.fragments);
1602 return copy_to_user((void *) arg, &abinfo,
1603 sizeof(abinfo)) ? -EFAULT : 0;
1604
1605 case SNDCTL_DSP_GETISPACE:
1606 if (!(file->f_mode & FMODE_READ))
1607 return -EINVAL;
1608 abinfo.fragsize = s->dma_adc.fragsize;
1609 spin_lock_irqsave(&s->lock, flags);
1610 count = s->dma_adc.count;
1611 count += dma_count_done(&s->dma_adc);
1612 spin_unlock_irqrestore(&s->lock, flags);
1613 if (count < 0)
1614 count = 0;
1615 abinfo.bytes = count / s->dma_adc.cnt_factor;
1616 abinfo.fragstotal = s->dma_adc.numfrag;
1617 abinfo.fragments = abinfo.bytes >> s->dma_adc.fragshift;
1618 return copy_to_user((void *) arg, &abinfo,
1619 sizeof(abinfo)) ? -EFAULT : 0;
1620
1621 case SNDCTL_DSP_NONBLOCK:
1622 file->f_flags |= O_NONBLOCK;
1623 return 0;
1624
1625 case SNDCTL_DSP_GETODELAY:
1626 if (!(file->f_mode & FMODE_WRITE))
1627 return -EINVAL;
1628 spin_lock_irqsave(&s->lock, flags);
1629 count = s->dma_dac.count;
1630 count -= dma_count_done(&s->dma_dac);
1631 spin_unlock_irqrestore(&s->lock, flags);
1632 if (count < 0)
1633 count = 0;
1634 count /= s->dma_dac.cnt_factor;
1635 return put_user(count, (int *) arg);
1636
1637 case SNDCTL_DSP_GETIPTR:
1638 if (!(file->f_mode & FMODE_READ))
1639 return -EINVAL;
1640 spin_lock_irqsave(&s->lock, flags);
1641 cinfo.bytes = s->dma_adc.total_bytes;
1642 count = s->dma_adc.count;
1643 if (!s->dma_adc.stopped) {
1644 diff = dma_count_done(&s->dma_adc);
1645 count += diff;
1646 cinfo.bytes += diff;
1647 cinfo.ptr = virt_to_phys(s->dma_adc.nextIn) + diff -
1648 virt_to_phys(s->dma_adc.rawbuf);
1649 } else
1650 cinfo.ptr = virt_to_phys(s->dma_adc.nextIn) -
1651 virt_to_phys(s->dma_adc.rawbuf);
1652 if (s->dma_adc.mapped)
1653 s->dma_adc.count &= (s->dma_adc.dma_fragsize-1);
1654 spin_unlock_irqrestore(&s->lock, flags);
1655 if (count < 0)
1656 count = 0;
1657 cinfo.blocks = count >> s->dma_adc.fragshift;
1658 return copy_to_user((void *) arg, &cinfo, sizeof(cinfo));
1659
1660 case SNDCTL_DSP_GETOPTR:
1661 if (!(file->f_mode & FMODE_READ))
1662 return -EINVAL;
1663 spin_lock_irqsave(&s->lock, flags);
1664 cinfo.bytes = s->dma_dac.total_bytes;
1665 count = s->dma_dac.count;
1666 if (!s->dma_dac.stopped) {
1667 diff = dma_count_done(&s->dma_dac);
1668 count -= diff;
1669 cinfo.bytes += diff;
1670 cinfo.ptr = virt_to_phys(s->dma_dac.nextOut) + diff -
1671 virt_to_phys(s->dma_dac.rawbuf);
1672 } else
1673 cinfo.ptr = virt_to_phys(s->dma_dac.nextOut) -
1674 virt_to_phys(s->dma_dac.rawbuf);
1675 if (s->dma_dac.mapped)
1676 s->dma_dac.count &= (s->dma_dac.dma_fragsize-1);
1677 spin_unlock_irqrestore(&s->lock, flags);
1678 if (count < 0)
1679 count = 0;
1680 cinfo.blocks = count >> s->dma_dac.fragshift;
1681 return copy_to_user((void *) arg, &cinfo, sizeof(cinfo));
1682
1683 case SNDCTL_DSP_GETBLKSIZE:
1684 if (file->f_mode & FMODE_WRITE)
1685 return put_user(s->dma_dac.fragsize, (int *) arg);
1686 else
1687 return put_user(s->dma_adc.fragsize, (int *) arg);
1688
1689 case SNDCTL_DSP_SETFRAGMENT:
1690 if (get_user(val, (int *) arg))
1691 return -EFAULT;
1692 if (file->f_mode & FMODE_READ) {
1693 stop_adc(s);
1694 s->dma_adc.ossfragshift = val & 0xffff;
1695 s->dma_adc.ossmaxfrags = (val >> 16) & 0xffff;
1696 if (s->dma_adc.ossfragshift < 4)
1697 s->dma_adc.ossfragshift = 4;
1698 if (s->dma_adc.ossfragshift > 15)
1699 s->dma_adc.ossfragshift = 15;
1700 if (s->dma_adc.ossmaxfrags < 4)
1701 s->dma_adc.ossmaxfrags = 4;
1702 if ((ret = prog_dmabuf_adc(s)))
1703 return ret;
1704 }
1705 if (file->f_mode & FMODE_WRITE) {
1706 stop_dac(s);
1707 s->dma_dac.ossfragshift = val & 0xffff;
1708 s->dma_dac.ossmaxfrags = (val >> 16) & 0xffff;
1709 if (s->dma_dac.ossfragshift < 4)
1710 s->dma_dac.ossfragshift = 4;
1711 if (s->dma_dac.ossfragshift > 15)
1712 s->dma_dac.ossfragshift = 15;
1713 if (s->dma_dac.ossmaxfrags < 4)
1714 s->dma_dac.ossmaxfrags = 4;
1715 if ((ret = prog_dmabuf_dac(s)))
1716 return ret;
1717 }
1718 return 0;
1719
1720 case SNDCTL_DSP_SUBDIVIDE:
1721 if ((file->f_mode & FMODE_READ && s->dma_adc.subdivision) ||
1722 (file->f_mode & FMODE_WRITE && s->dma_dac.subdivision))
1723 return -EINVAL;
1724 if (get_user(val, (int *) arg))
1725 return -EFAULT;
1726 if (val != 1 && val != 2 && val != 4)
1727 return -EINVAL;
1728 if (file->f_mode & FMODE_READ) {
1729 stop_adc(s);
1730 s->dma_adc.subdivision = val;
1731 if ((ret = prog_dmabuf_adc(s)))
1732 return ret;
1733 }
1734 if (file->f_mode & FMODE_WRITE) {
1735 stop_dac(s);
1736 s->dma_dac.subdivision = val;
1737 if ((ret = prog_dmabuf_dac(s)))
1738 return ret;
1739 }
1740 return 0;
1741
1742 case SOUND_PCM_READ_RATE:
1743 return put_user((file->f_mode & FMODE_READ) ?
1744 s->dma_adc.sample_rate :
1745 s->dma_dac.sample_rate,
1746 (int *)arg);
1747
1748 case SOUND_PCM_READ_CHANNELS:
1749 if (file->f_mode & FMODE_READ)
1750 return put_user(s->dma_adc.num_channels, (int *)arg);
1751 else
1752 return put_user(s->dma_dac.num_channels, (int *)arg);
1753
1754 case SOUND_PCM_READ_BITS:
1755 if (file->f_mode & FMODE_READ)
1756 return put_user(s->dma_adc.sample_size, (int *)arg);
1757 else
1758 return put_user(s->dma_dac.sample_size, (int *)arg);
1759
1760 case SOUND_PCM_WRITE_FILTER:
1761 case SNDCTL_DSP_SETSYNCRO:
1762 case SOUND_PCM_READ_FILTER:
1763 return -EINVAL;
1764 }
1765
1766 return mixdev_ioctl(s->codec, cmd, arg);
1767 }
1768
1769
1770 static int
1771 au1550_open(struct inode *inode, struct file *file)
1772 {
1773 int minor = MINOR(inode->i_rdev);
1774 DECLARE_WAITQUEUE(wait, current);
1775 struct au1550_state *s = &au1550_state;
1776 int ret;
1777
1778 #ifdef DEBUG
1779 if (file->f_flags & O_NONBLOCK)
1780 pr_debug("open: non-blocking\n");
1781 else
1782 pr_debug("open: blocking\n");
1783 #endif
1784
1785 file->private_data = s;
1786 /* wait for device to become free */
1787 down(&s->open_sem);
1788 while (s->open_mode & file->f_mode) {
1789 if (file->f_flags & O_NONBLOCK) {
1790 up(&s->open_sem);
1791 return -EBUSY;
1792 }
1793 add_wait_queue(&s->open_wait, &wait);
1794 __set_current_state(TASK_INTERRUPTIBLE);
1795 up(&s->open_sem);
1796 schedule();
1797 remove_wait_queue(&s->open_wait, &wait);
1798 set_current_state(TASK_RUNNING);
1799 if (signal_pending(current))
1800 return -ERESTARTSYS;
1801 down(&s->open_sem);
1802 }
1803
1804 stop_dac(s);
1805 stop_adc(s);
1806
1807 if (file->f_mode & FMODE_READ) {
1808 s->dma_adc.ossfragshift = s->dma_adc.ossmaxfrags =
1809 s->dma_adc.subdivision = s->dma_adc.total_bytes = 0;
1810 s->dma_adc.num_channels = 1;
1811 s->dma_adc.sample_size = 8;
1812 set_adc_rate(s, 8000);
1813 if ((minor & 0xf) == SND_DEV_DSP16)
1814 s->dma_adc.sample_size = 16;
1815 }
1816
1817 if (file->f_mode & FMODE_WRITE) {
1818 s->dma_dac.ossfragshift = s->dma_dac.ossmaxfrags =
1819 s->dma_dac.subdivision = s->dma_dac.total_bytes = 0;
1820 s->dma_dac.num_channels = 1;
1821 s->dma_dac.sample_size = 8;
1822 set_dac_rate(s, 8000);
1823 if ((minor & 0xf) == SND_DEV_DSP16)
1824 s->dma_dac.sample_size = 16;
1825 }
1826
1827 if (file->f_mode & FMODE_READ) {
1828 if ((ret = prog_dmabuf_adc(s)))
1829 return ret;
1830 }
1831 if (file->f_mode & FMODE_WRITE) {
1832 if ((ret = prog_dmabuf_dac(s)))
1833 return ret;
1834 }
1835
1836 s->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
1837 up(&s->open_sem);
1838 init_MUTEX(&s->sem);
1839 return 0;
1840 }
1841
1842 static int
1843 au1550_release(struct inode *inode, struct file *file)
1844 {
1845 struct au1550_state *s = (struct au1550_state *)file->private_data;
1846
1847 lock_kernel();
1848
1849 if (file->f_mode & FMODE_WRITE) {
1850 unlock_kernel();
1851 drain_dac(s, file->f_flags & O_NONBLOCK);
1852 lock_kernel();
1853 }
1854
1855 down(&s->open_sem);
1856 if (file->f_mode & FMODE_WRITE) {
1857 stop_dac(s);
1858 kfree(s->dma_dac.rawbuf);
1859 s->dma_dac.rawbuf = NULL;
1860 }
1861 if (file->f_mode & FMODE_READ) {
1862 stop_adc(s);
1863 kfree(s->dma_adc.rawbuf);
1864 s->dma_adc.rawbuf = NULL;
1865 }
1866 s->open_mode &= ((~file->f_mode) & (FMODE_READ|FMODE_WRITE));
1867 up(&s->open_sem);
1868 wake_up(&s->open_wait);
1869 unlock_kernel();
1870 return 0;
1871 }
1872
1873 static /*const */ struct file_operations au1550_audio_fops = {
1874 owner: THIS_MODULE,
1875 llseek: au1550_llseek,
1876 read: au1550_read,
1877 write: au1550_write,
1878 poll: au1550_poll,
1879 ioctl: au1550_ioctl,
1880 mmap: au1550_mmap,
1881 open: au1550_open,
1882 release: au1550_release,
1883 };
1884
1885 MODULE_AUTHOR("Advanced Micro Devices (AMD), dan@embeddededge.com");
1886 MODULE_DESCRIPTION("Au1550 AC97 Audio Driver");
1887
1888 static int __devinit
1889 au1550_probe(void)
1890 {
1891 struct au1550_state *s = &au1550_state;
1892 int val;
1893
1894 memset(s, 0, sizeof(struct au1550_state));
1895
1896 init_waitqueue_head(&s->dma_adc.wait);
1897 init_waitqueue_head(&s->dma_dac.wait);
1898 init_waitqueue_head(&s->open_wait);
1899 init_MUTEX(&s->open_sem);
1900 spin_lock_init(&s->lock);
1901
1902 s->codec = ac97_alloc_codec();
1903 if(s->codec == NULL) {
1904 err("Out of memory");
1905 return -1;
1906 }
1907 s->codec->private_data = s;
1908 s->codec->id = 0;
1909 s->codec->codec_read = rdcodec;
1910 s->codec->codec_write = wrcodec;
1911 s->codec->codec_wait = waitcodec;
1912
1913 if (!request_mem_region(CPHYSADDR(AC97_PSC_SEL),
1914 0x30, "Au1550 AC97")) {
1915 err("AC'97 ports in use");
1916 }
1917
1918 /* Allocate the DMA Channels
1919 */
1920 if ((s->dma_dac.dmanr = au1xxx_dbdma_chan_alloc(DBDMA_MEM_CHAN,
1921 DBDMA_AC97_TX_CHAN, dac_dma_interrupt, (void *)s)) == 0) {
1922 err("Can't get DAC DMA");
1923 goto err_dma1;
1924 }
1925 au1xxx_dbdma_set_devwidth(s->dma_dac.dmanr, 16);
1926 if (au1xxx_dbdma_ring_alloc(s->dma_dac.dmanr,
1927 NUM_DBDMA_DESCRIPTORS) == 0) {
1928 err("Can't get DAC DMA descriptors");
1929 goto err_dma1;
1930 }
1931
1932 if ((s->dma_adc.dmanr = au1xxx_dbdma_chan_alloc(DBDMA_AC97_RX_CHAN,
1933 DBDMA_MEM_CHAN, adc_dma_interrupt, (void *)s)) == 0) {
1934 err("Can't get ADC DMA");
1935 goto err_dma2;
1936 }
1937 au1xxx_dbdma_set_devwidth(s->dma_adc.dmanr, 16);
1938 if (au1xxx_dbdma_ring_alloc(s->dma_adc.dmanr,
1939 NUM_DBDMA_DESCRIPTORS) == 0) {
1940 err("Can't get ADC DMA descriptors");
1941 goto err_dma2;
1942 }
1943
1944 pr_info("DAC: DMA%d, ADC: DMA%d", DBDMA_AC97_TX_CHAN, DBDMA_AC97_RX_CHAN);
1945
1946 /* register devices */
1947
1948 if ((s->dev_audio = register_sound_dsp(&au1550_audio_fops, -1)) < 0)
1949 goto err_dev1;
1950 if ((s->codec->dev_mixer =
1951 register_sound_mixer(&au1550_mixer_fops, -1)) < 0)
1952 goto err_dev2;
1953
1954 /* The GPIO for the appropriate PSC was configured by the
1955 * board specific start up.
1956 *
1957 * configure PSC for AC'97
1958 */
1959 au_writel(0, AC97_PSC_CTRL); /* Disable PSC */
1960 au_sync();
1961 au_writel((PSC_SEL_CLK_SERCLK | PSC_SEL_PS_AC97MODE), AC97_PSC_SEL);
1962 au_sync();
1963
1964 /* cold reset the AC'97
1965 */
1966 au_writel(PSC_AC97RST_RST, PSC_AC97RST);
1967 au_sync();
1968 au1550_delay(10);
1969 au_writel(0, PSC_AC97RST);
1970 au_sync();
1971
1972 /* need to delay around 500msec(bleech) to give
1973 some CODECs enough time to wakeup */
1974 au1550_delay(500);
1975
1976 /* warm reset the AC'97 to start the bitclk
1977 */
1978 au_writel(PSC_AC97RST_SNC, PSC_AC97RST);
1979 au_sync();
1980 udelay(100);
1981 au_writel(0, PSC_AC97RST);
1982 au_sync();
1983
1984 /* Enable PSC
1985 */
1986 au_writel(PSC_CTRL_ENABLE, AC97_PSC_CTRL);
1987 au_sync();
1988
1989 /* Wait for PSC ready.
1990 */
1991 do {
1992 val = readl((void *)PSC_AC97STAT);
1993 au_sync();
1994 } while ((val & PSC_AC97STAT_SR) == 0);
1995
1996 /* Configure AC97 controller.
1997 * Deep FIFO, 16-bit sample, DMA, make sure DMA matches fifo size.
1998 */
1999 val = PSC_AC97CFG_SET_LEN(16);
2000 val |= PSC_AC97CFG_RT_FIFO8 | PSC_AC97CFG_TT_FIFO8;
2001
2002 /* Enable device so we can at least
2003 * talk over the AC-link.
2004 */
2005 au_writel(val, PSC_AC97CFG);
2006 au_writel(PSC_AC97MSK_ALLMASK, PSC_AC97MSK);
2007 au_sync();
2008 val |= PSC_AC97CFG_DE_ENABLE;
2009 au_writel(val, PSC_AC97CFG);
2010 au_sync();
2011
2012 /* Wait for Device ready.
2013 */
2014 do {
2015 val = readl((void *)PSC_AC97STAT);
2016 au_sync();
2017 } while ((val & PSC_AC97STAT_DR) == 0);
2018
2019 /* codec init */
2020 if (!ac97_probe_codec(s->codec))
2021 goto err_dev3;
2022
2023 s->codec_base_caps = rdcodec(s->codec, AC97_RESET);
2024 s->codec_ext_caps = rdcodec(s->codec, AC97_EXTENDED_ID);
2025 pr_info("AC'97 Base/Extended ID = %04x/%04x",
2026 s->codec_base_caps, s->codec_ext_caps);
2027
2028 if (!(s->codec_ext_caps & AC97_EXTID_VRA)) {
2029 /* codec does not support VRA
2030 */
2031 s->no_vra = 1;
2032 } else if (!vra) {
2033 /* Boot option says disable VRA
2034 */
2035 u16 ac97_extstat = rdcodec(s->codec, AC97_EXTENDED_STATUS);
2036 wrcodec(s->codec, AC97_EXTENDED_STATUS,
2037 ac97_extstat & ~AC97_EXTSTAT_VRA);
2038 s->no_vra = 1;
2039 }
2040 if (s->no_vra)
2041 pr_info("no VRA, interpolating and decimating");
2042
2043 /* set mic to be the recording source */
2044 val = SOUND_MASK_MIC;
2045 mixdev_ioctl(s->codec, SOUND_MIXER_WRITE_RECSRC,
2046 (unsigned long) &val);
2047
2048 return 0;
2049
2050 err_dev3:
2051 unregister_sound_mixer(s->codec->dev_mixer);
2052 err_dev2:
2053 unregister_sound_dsp(s->dev_audio);
2054 err_dev1:
2055 au1xxx_dbdma_chan_free(s->dma_adc.dmanr);
2056 err_dma2:
2057 au1xxx_dbdma_chan_free(s->dma_dac.dmanr);
2058 err_dma1:
2059 release_mem_region(CPHYSADDR(AC97_PSC_SEL), 0x30);
2060
2061 ac97_release_codec(s->codec);
2062 return -1;
2063 }
2064
2065 static void __devinit
2066 au1550_remove(void)
2067 {
2068 struct au1550_state *s = &au1550_state;
2069
2070 if (!s)
2071 return;
2072 synchronize_irq();
2073 au1xxx_dbdma_chan_free(s->dma_adc.dmanr);
2074 au1xxx_dbdma_chan_free(s->dma_dac.dmanr);
2075 release_mem_region(CPHYSADDR(AC97_PSC_SEL), 0x30);
2076 unregister_sound_dsp(s->dev_audio);
2077 unregister_sound_mixer(s->codec->dev_mixer);
2078 ac97_release_codec(s->codec);
2079 }
2080
2081 static int __init
2082 init_au1550(void)
2083 {
2084 return au1550_probe();
2085 }
2086
2087 static void __exit
2088 cleanup_au1550(void)
2089 {
2090 au1550_remove();
2091 }
2092
2093 module_init(init_au1550);
2094 module_exit(cleanup_au1550);
2095
2096 #ifndef MODULE
2097
2098 static int __init
2099 au1550_setup(char *options)
2100 {
2101 char *this_opt;
2102
2103 if (!options || !*options)
2104 return 0;
2105
2106 while ((this_opt = strsep(&options, ","))) {
2107 if (!*this_opt)
2108 continue;
2109 if (!strncmp(this_opt, "vra", 3)) {
2110 vra = 1;
2111 }
2112 }
2113
2114 return 1;
2115 }
2116
2117 __setup("au1550_audio=", au1550_setup);
2118
2119 #endif /* MODULE */
kernel source for telekom puls (alcatel/mediatek)