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[SCSI] sym2: Remove last vestiges of sym_sniff_inquiry
[linux-2.6/linux-acpi-2.6/ibm-acpi-2.6.git] / sound / oss / au1550_ac97.c
blob6b46a8a4b1ccb49fbcc88a816e081802a6b461ef
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/module.h>
39 #include <linux/string.h>
40 #include <linux/ioport.h>
41 #include <linux/sched.h>
42 #include <linux/delay.h>
43 #include <linux/sound.h>
44 #include <linux/slab.h>
45 #include <linux/soundcard.h>
46 #include <linux/init.h>
47 #include <linux/interrupt.h>
48 #include <linux/kernel.h>
49 #include <linux/poll.h>
50 #include <linux/pci.h>
51 #include <linux/bitops.h>
52 #include <linux/spinlock.h>
53 #include <linux/smp_lock.h>
54 #include <linux/ac97_codec.h>
55 #include <asm/io.h>
56 #include <asm/uaccess.h>
57 #include <asm/hardirq.h>
58 #include <asm/mach-au1x00/au1000.h>
59 #include <asm/mach-au1x00/au1xxx_psc.h>
60 #include <asm/mach-au1x00/au1xxx_dbdma.h>
61
62 #undef OSS_DOCUMENTED_MIXER_SEMANTICS
63
64 /* misc stuff */
65 #define POLL_COUNT 0x50000
66 #define AC97_EXT_DACS (AC97_EXTID_SDAC | AC97_EXTID_CDAC | AC97_EXTID_LDAC)
67
68 /* The number of DBDMA ring descriptors to allocate. No sense making
69 * this too large....if you can't keep up with a few you aren't likely
70 * to be able to with lots of them, either.
71 */
72 #define NUM_DBDMA_DESCRIPTORS 4
73
74 #define err(format, arg...) printk(KERN_ERR format "\n" , ## arg)
75
76 /* Boot options
77 * 0 = no VRA, 1 = use VRA if codec supports it
78 */
79 static int vra = 1;
80 MODULE_PARM(vra, "i");
81 MODULE_PARM_DESC(vra, "if 1 use VRA if codec supports it");
82
83 static struct au1550_state {
84 /* soundcore stuff */
85 int dev_audio;
86
87 struct ac97_codec *codec;
88 unsigned codec_base_caps; /* AC'97 reg 00h, "Reset Register" */
89 unsigned codec_ext_caps; /* AC'97 reg 28h, "Extended Audio ID" */
90 int no_vra; /* do not use VRA */
91
92 spinlock_t lock;
93 struct semaphore open_sem;
94 struct semaphore sem;
95 mode_t open_mode;
96 wait_queue_head_t open_wait;
97
98 struct dmabuf {
99 u32 dmanr;
100 unsigned sample_rate;
101 unsigned src_factor;
102 unsigned sample_size;
103 int num_channels;
104 int dma_bytes_per_sample;
105 int user_bytes_per_sample;
106 int cnt_factor;
107
108 void *rawbuf;
109 unsigned buforder;
110 unsigned numfrag;
111 unsigned fragshift;
112 void *nextIn;
113 void *nextOut;
114 int count;
115 unsigned total_bytes;
116 unsigned error;
117 wait_queue_head_t wait;
118
119 /* redundant, but makes calculations easier */
120 unsigned fragsize;
121 unsigned dma_fragsize;
122 unsigned dmasize;
123 unsigned dma_qcount;
124
125 /* OSS stuff */
126 unsigned mapped:1;
127 unsigned ready:1;
128 unsigned stopped:1;
129 unsigned ossfragshift;
130 int ossmaxfrags;
131 unsigned subdivision;
132 } dma_dac, dma_adc;
133 } au1550_state;
134
135 static unsigned
136 ld2(unsigned int x)
137 {
138 unsigned r = 0;
139
140 if (x >= 0x10000) {
141 x >>= 16;
142 r += 16;
143 }
144 if (x >= 0x100) {
145 x >>= 8;
146 r += 8;
147 }
148 if (x >= 0x10) {
149 x >>= 4;
150 r += 4;
151 }
152 if (x >= 4) {
153 x >>= 2;
154 r += 2;
155 }
156 if (x >= 2)
157 r++;
158 return r;
159 }
160
161 static void
162 au1550_delay(int msec)
163 {
164 unsigned long tmo;
165 signed long tmo2;
166
167 if (in_interrupt())
168 return;
169
170 tmo = jiffies + (msec * HZ) / 1000;
171 for (;;) {
172 tmo2 = tmo - jiffies;
173 if (tmo2 <= 0)
174 break;
175 schedule_timeout(tmo2);
176 }
177 }
178
179 static u16
180 rdcodec(struct ac97_codec *codec, u8 addr)
181 {
182 struct au1550_state *s = (struct au1550_state *)codec->private_data;
183 unsigned long flags;
184 u32 cmd, val;
185 u16 data;
186 int i;
187
188 spin_lock_irqsave(&s->lock, flags);
189
190 for (i = 0; i < POLL_COUNT; i++) {
191 val = au_readl(PSC_AC97STAT);
192 au_sync();
193 if (!(val & PSC_AC97STAT_CP))
194 break;
195 }
196 if (i == POLL_COUNT)
197 err("rdcodec: codec cmd pending expired!");
198
199 cmd = (u32)PSC_AC97CDC_INDX(addr);
200 cmd |= PSC_AC97CDC_RD; /* read command */
201 au_writel(cmd, PSC_AC97CDC);
202 au_sync();
203
204 /* now wait for the data
205 */
206 for (i = 0; i < POLL_COUNT; i++) {
207 val = au_readl(PSC_AC97STAT);
208 au_sync();
209 if (!(val & PSC_AC97STAT_CP))
210 break;
211 }
212 if (i == POLL_COUNT) {
213 err("rdcodec: read poll expired!");
214 return 0;
215 }
216
217 /* wait for command done?
218 */
219 for (i = 0; i < POLL_COUNT; i++) {
220 val = au_readl(PSC_AC97EVNT);
221 au_sync();
222 if (val & PSC_AC97EVNT_CD)
223 break;
224 }
225 if (i == POLL_COUNT) {
226 err("rdcodec: read cmdwait expired!");
227 return 0;
228 }
229
230 data = au_readl(PSC_AC97CDC) & 0xffff;
231 au_sync();
232
233 /* Clear command done event.
234 */
235 au_writel(PSC_AC97EVNT_CD, PSC_AC97EVNT);
236 au_sync();
237
238 spin_unlock_irqrestore(&s->lock, flags);
239
240 return data;
241 }
242
243
244 static void
245 wrcodec(struct ac97_codec *codec, u8 addr, u16 data)
246 {
247 struct au1550_state *s = (struct au1550_state *)codec->private_data;
248 unsigned long flags;
249 u32 cmd, val;
250 int i;
251
252 spin_lock_irqsave(&s->lock, flags);
253
254 for (i = 0; i < POLL_COUNT; i++) {
255 val = au_readl(PSC_AC97STAT);
256 au_sync();
257 if (!(val & PSC_AC97STAT_CP))
258 break;
259 }
260 if (i == POLL_COUNT)
261 err("wrcodec: codec cmd pending expired!");
262
263 cmd = (u32)PSC_AC97CDC_INDX(addr);
264 cmd |= (u32)data;
265 au_writel(cmd, PSC_AC97CDC);
266 au_sync();
267
268 for (i = 0; i < POLL_COUNT; i++) {
269 val = au_readl(PSC_AC97STAT);
270 au_sync();
271 if (!(val & PSC_AC97STAT_CP))
272 break;
273 }
274 if (i == POLL_COUNT)
275 err("wrcodec: codec cmd pending expired!");
276
277 for (i = 0; i < POLL_COUNT; i++) {
278 val = au_readl(PSC_AC97EVNT);
279 au_sync();
280 if (val & PSC_AC97EVNT_CD)
281 break;
282 }
283 if (i == POLL_COUNT)
284 err("wrcodec: read cmdwait expired!");
285
286 /* Clear command done event.
287 */
288 au_writel(PSC_AC97EVNT_CD, PSC_AC97EVNT);
289 au_sync();
290
291 spin_unlock_irqrestore(&s->lock, flags);
292 }
293
294 static void
295 waitcodec(struct ac97_codec *codec)
296 {
297 u16 temp;
298 u32 val;
299 int i;
300
301 /* codec_wait is used to wait for a ready state after
302 * an AC97C_RESET.
303 */
304 au1550_delay(10);
305
306 /* first poll the CODEC_READY tag bit
307 */
308 for (i = 0; i < POLL_COUNT; i++) {
309 val = au_readl(PSC_AC97STAT);
310 au_sync();
311 if (val & PSC_AC97STAT_CR)
312 break;
313 }
314 if (i == POLL_COUNT) {
315 err("waitcodec: CODEC_READY poll expired!");
316 return;
317 }
318
319 /* get AC'97 powerdown control/status register
320 */
321 temp = rdcodec(codec, AC97_POWER_CONTROL);
322
323 /* If anything is powered down, power'em up
324 */
325 if (temp & 0x7f00) {
326 /* Power on
327 */
328 wrcodec(codec, AC97_POWER_CONTROL, 0);
329 au1550_delay(100);
330
331 /* Reread
332 */
333 temp = rdcodec(codec, AC97_POWER_CONTROL);
334 }
335
336 /* Check if Codec REF,ANL,DAC,ADC ready
337 */
338 if ((temp & 0x7f0f) != 0x000f)
339 err("codec reg 26 status (0x%x) not ready!!", temp);
340 }
341
342 /* stop the ADC before calling */
343 static void
344 set_adc_rate(struct au1550_state *s, unsigned rate)
345 {
346 struct dmabuf *adc = &s->dma_adc;
347 struct dmabuf *dac = &s->dma_dac;
348 unsigned adc_rate, dac_rate;
349 u16 ac97_extstat;
350
351 if (s->no_vra) {
352 /* calc SRC factor
353 */
354 adc->src_factor = ((96000 / rate) + 1) >> 1;
355 adc->sample_rate = 48000 / adc->src_factor;
356 return;
357 }
358
359 adc->src_factor = 1;
360
361 ac97_extstat = rdcodec(s->codec, AC97_EXTENDED_STATUS);
362
363 rate = rate > 48000 ? 48000 : rate;
364
365 /* enable VRA
366 */
367 wrcodec(s->codec, AC97_EXTENDED_STATUS,
368 ac97_extstat | AC97_EXTSTAT_VRA);
369
370 /* now write the sample rate
371 */
372 wrcodec(s->codec, AC97_PCM_LR_ADC_RATE, (u16) rate);
373
374 /* read it back for actual supported rate
375 */
376 adc_rate = rdcodec(s->codec, AC97_PCM_LR_ADC_RATE);
377
378 pr_debug("set_adc_rate: set to %d Hz\n", adc_rate);
379
380 /* some codec's don't allow unequal DAC and ADC rates, in which case
381 * writing one rate reg actually changes both.
382 */
383 dac_rate = rdcodec(s->codec, AC97_PCM_FRONT_DAC_RATE);
384 if (dac->num_channels > 2)
385 wrcodec(s->codec, AC97_PCM_SURR_DAC_RATE, dac_rate);
386 if (dac->num_channels > 4)
387 wrcodec(s->codec, AC97_PCM_LFE_DAC_RATE, dac_rate);
388
389 adc->sample_rate = adc_rate;
390 dac->sample_rate = dac_rate;
391 }
392
393 /* stop the DAC before calling */
394 static void
395 set_dac_rate(struct au1550_state *s, unsigned rate)
396 {
397 struct dmabuf *dac = &s->dma_dac;
398 struct dmabuf *adc = &s->dma_adc;
399 unsigned adc_rate, dac_rate;
400 u16 ac97_extstat;
401
402 if (s->no_vra) {
403 /* calc SRC factor
404 */
405 dac->src_factor = ((96000 / rate) + 1) >> 1;
406 dac->sample_rate = 48000 / dac->src_factor;
407 return;
408 }
409
410 dac->src_factor = 1;
411
412 ac97_extstat = rdcodec(s->codec, AC97_EXTENDED_STATUS);
413
414 rate = rate > 48000 ? 48000 : rate;
415
416 /* enable VRA
417 */
418 wrcodec(s->codec, AC97_EXTENDED_STATUS,
419 ac97_extstat | AC97_EXTSTAT_VRA);
420
421 /* now write the sample rate
422 */
423 wrcodec(s->codec, AC97_PCM_FRONT_DAC_RATE, (u16) rate);
424
425 /* I don't support different sample rates for multichannel,
426 * so make these channels the same.
427 */
428 if (dac->num_channels > 2)
429 wrcodec(s->codec, AC97_PCM_SURR_DAC_RATE, (u16) rate);
430 if (dac->num_channels > 4)
431 wrcodec(s->codec, AC97_PCM_LFE_DAC_RATE, (u16) rate);
432 /* read it back for actual supported rate
433 */
434 dac_rate = rdcodec(s->codec, AC97_PCM_FRONT_DAC_RATE);
435
436 pr_debug("set_dac_rate: set to %d Hz\n", dac_rate);
437
438 /* some codec's don't allow unequal DAC and ADC rates, in which case
439 * writing one rate reg actually changes both.
440 */
441 adc_rate = rdcodec(s->codec, AC97_PCM_LR_ADC_RATE);
442
443 dac->sample_rate = dac_rate;
444 adc->sample_rate = adc_rate;
445 }
446
447 static void
448 stop_dac(struct au1550_state *s)
449 {
450 struct dmabuf *db = &s->dma_dac;
451 u32 stat;
452 unsigned long flags;
453
454 if (db->stopped)
455 return;
456
457 spin_lock_irqsave(&s->lock, flags);
458
459 au_writel(PSC_AC97PCR_TP, PSC_AC97PCR);
460 au_sync();
461
462 /* Wait for Transmit Busy to show disabled.
463 */
464 do {
465 stat = readl((void *)PSC_AC97STAT);
466 au_sync();
467 } while ((stat & PSC_AC97STAT_TB) != 0);
468
469 au1xxx_dbdma_reset(db->dmanr);
470
471 db->stopped = 1;
472
473 spin_unlock_irqrestore(&s->lock, flags);
474 }
475
476 static void
477 stop_adc(struct au1550_state *s)
478 {
479 struct dmabuf *db = &s->dma_adc;
480 unsigned long flags;
481 u32 stat;
482
483 if (db->stopped)
484 return;
485
486 spin_lock_irqsave(&s->lock, flags);
487
488 au_writel(PSC_AC97PCR_RP, PSC_AC97PCR);
489 au_sync();
490
491 /* Wait for Receive Busy to show disabled.
492 */
493 do {
494 stat = readl((void *)PSC_AC97STAT);
495 au_sync();
496 } while ((stat & PSC_AC97STAT_RB) != 0);
497
498 au1xxx_dbdma_reset(db->dmanr);
499
500 db->stopped = 1;
501
502 spin_unlock_irqrestore(&s->lock, flags);
503 }
504
505
506 static void
507 set_xmit_slots(int num_channels)
508 {
509 u32 ac97_config, stat;
510
511 ac97_config = au_readl(PSC_AC97CFG);
512 au_sync();
513 ac97_config &= ~(PSC_AC97CFG_TXSLOT_MASK | PSC_AC97CFG_DE_ENABLE);
514 au_writel(ac97_config, PSC_AC97CFG);
515 au_sync();
516
517 switch (num_channels) {
518 case 6: /* stereo with surround and center/LFE,
519 * slots 3,4,6,7,8,9
520 */
521 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(6);
522 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(9);
523
524 case 4: /* stereo with surround, slots 3,4,7,8 */
525 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(7);
526 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(8);
527
528 case 2: /* stereo, slots 3,4 */
529 case 1: /* mono */
530 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(3);
531 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(4);
532 }
533
534 au_writel(ac97_config, PSC_AC97CFG);
535 au_sync();
536
537 ac97_config |= PSC_AC97CFG_DE_ENABLE;
538 au_writel(ac97_config, PSC_AC97CFG);
539 au_sync();
540
541 /* Wait for Device ready.
542 */
543 do {
544 stat = readl((void *)PSC_AC97STAT);
545 au_sync();
546 } while ((stat & PSC_AC97STAT_DR) == 0);
547 }
548
549 static void
550 set_recv_slots(int num_channels)
551 {
552 u32 ac97_config, stat;
553
554 ac97_config = au_readl(PSC_AC97CFG);
555 au_sync();
556 ac97_config &= ~(PSC_AC97CFG_RXSLOT_MASK | PSC_AC97CFG_DE_ENABLE);
557 au_writel(ac97_config, PSC_AC97CFG);
558 au_sync();
559
560 /* Always enable slots 3 and 4 (stereo). Slot 6 is
561 * optional Mic ADC, which we don't support yet.
562 */
563 ac97_config |= PSC_AC97CFG_RXSLOT_ENA(3);
564 ac97_config |= PSC_AC97CFG_RXSLOT_ENA(4);
565
566 au_writel(ac97_config, PSC_AC97CFG);
567 au_sync();
568
569 ac97_config |= PSC_AC97CFG_DE_ENABLE;
570 au_writel(ac97_config, PSC_AC97CFG);
571 au_sync();
572
573 /* Wait for Device ready.
574 */
575 do {
576 stat = readl((void *)PSC_AC97STAT);
577 au_sync();
578 } while ((stat & PSC_AC97STAT_DR) == 0);
579 }
580
581 static void
582 start_dac(struct au1550_state *s)
583 {
584 struct dmabuf *db = &s->dma_dac;
585 unsigned long flags;
586
587 if (!db->stopped)
588 return;
589
590 spin_lock_irqsave(&s->lock, flags);
591
592 set_xmit_slots(db->num_channels);
593 au_writel(PSC_AC97PCR_TC, PSC_AC97PCR);
594 au_sync();
595 au_writel(PSC_AC97PCR_TS, PSC_AC97PCR);
596 au_sync();
597
598 au1xxx_dbdma_start(db->dmanr);
599
600 db->stopped = 0;
601
602 spin_unlock_irqrestore(&s->lock, flags);
603 }
604
605 static void
606 start_adc(struct au1550_state *s)
607 {
608 struct dmabuf *db = &s->dma_adc;
609 int i;
610
611 if (!db->stopped)
612 return;
613
614 /* Put two buffers on the ring to get things started.
615 */
616 for (i=0; i<2; i++) {
617 au1xxx_dbdma_put_dest(db->dmanr, db->nextIn, db->dma_fragsize);
618
619 db->nextIn += db->dma_fragsize;
620 if (db->nextIn >= db->rawbuf + db->dmasize)
621 db->nextIn -= db->dmasize;
622 }
623
624 set_recv_slots(db->num_channels);
625 au1xxx_dbdma_start(db->dmanr);
626 au_writel(PSC_AC97PCR_RC, PSC_AC97PCR);
627 au_sync();
628 au_writel(PSC_AC97PCR_RS, PSC_AC97PCR);
629 au_sync();
630
631 db->stopped = 0;
632 }
633
634 static int
635 prog_dmabuf(struct au1550_state *s, struct dmabuf *db)
636 {
637 unsigned user_bytes_per_sec;
638 unsigned bufs;
639 unsigned rate = db->sample_rate;
640
641 if (!db->rawbuf) {
642 db->ready = db->mapped = 0;
643 db->buforder = 5; /* 32 * PAGE_SIZE */
644 db->rawbuf = kmalloc((PAGE_SIZE << db->buforder), GFP_KERNEL);
645 if (!db->rawbuf)
646 return -ENOMEM;
647 }
648
649 db->cnt_factor = 1;
650 if (db->sample_size == 8)
651 db->cnt_factor *= 2;
652 if (db->num_channels == 1)
653 db->cnt_factor *= 2;
654 db->cnt_factor *= db->src_factor;
655
656 db->count = 0;
657 db->dma_qcount = 0;
658 db->nextIn = db->nextOut = db->rawbuf;
659
660 db->user_bytes_per_sample = (db->sample_size>>3) * db->num_channels;
661 db->dma_bytes_per_sample = 2 * ((db->num_channels == 1) ?
662 2 : db->num_channels);
663
664 user_bytes_per_sec = rate * db->user_bytes_per_sample;
665 bufs = PAGE_SIZE << db->buforder;
666 if (db->ossfragshift) {
667 if ((1000 << db->ossfragshift) < user_bytes_per_sec)
668 db->fragshift = ld2(user_bytes_per_sec/1000);
669 else
670 db->fragshift = db->ossfragshift;
671 } else {
672 db->fragshift = ld2(user_bytes_per_sec / 100 /
673 (db->subdivision ? db->subdivision : 1));
674 if (db->fragshift < 3)
675 db->fragshift = 3;
676 }
677
678 db->fragsize = 1 << db->fragshift;
679 db->dma_fragsize = db->fragsize * db->cnt_factor;
680 db->numfrag = bufs / db->dma_fragsize;
681
682 while (db->numfrag < 4 && db->fragshift > 3) {
683 db->fragshift--;
684 db->fragsize = 1 << db->fragshift;
685 db->dma_fragsize = db->fragsize * db->cnt_factor;
686 db->numfrag = bufs / db->dma_fragsize;
687 }
688
689 if (db->ossmaxfrags >= 4 && db->ossmaxfrags < db->numfrag)
690 db->numfrag = db->ossmaxfrags;
691
692 db->dmasize = db->dma_fragsize * db->numfrag;
693 memset(db->rawbuf, 0, bufs);
694
695 pr_debug("prog_dmabuf: rate=%d, samplesize=%d, channels=%d\n",
696 rate, db->sample_size, db->num_channels);
697 pr_debug("prog_dmabuf: fragsize=%d, cnt_factor=%d, dma_fragsize=%d\n",
698 db->fragsize, db->cnt_factor, db->dma_fragsize);
699 pr_debug("prog_dmabuf: numfrag=%d, dmasize=%d\n", db->numfrag, db->dmasize);
700
701 db->ready = 1;
702 return 0;
703 }
704
705 static int
706 prog_dmabuf_adc(struct au1550_state *s)
707 {
708 stop_adc(s);
709 return prog_dmabuf(s, &s->dma_adc);
710
711 }
712
713 static int
714 prog_dmabuf_dac(struct au1550_state *s)
715 {
716 stop_dac(s);
717 return prog_dmabuf(s, &s->dma_dac);
718 }
719
720
721 /* hold spinlock for the following */
722 static void
723 dac_dma_interrupt(int irq, void *dev_id, struct pt_regs *regs)
724 {
725 struct au1550_state *s = (struct au1550_state *) dev_id;
726 struct dmabuf *db = &s->dma_dac;
727 u32 ac97c_stat;
728
729 ac97c_stat = au_readl(PSC_AC97STAT);
730 if (ac97c_stat & (AC97C_XU | AC97C_XO | AC97C_TE))
731 pr_debug("AC97C status = 0x%08x\n", ac97c_stat);
732 db->dma_qcount--;
733
734 if (db->count >= db->fragsize) {
735 if (au1xxx_dbdma_put_source(db->dmanr, db->nextOut,
736 db->fragsize) == 0) {
737 err("qcount < 2 and no ring room!");
738 }
739 db->nextOut += db->fragsize;
740 if (db->nextOut >= db->rawbuf + db->dmasize)
741 db->nextOut -= db->dmasize;
742 db->count -= db->fragsize;
743 db->total_bytes += db->dma_fragsize;
744 db->dma_qcount++;
745 }
746
747 /* wake up anybody listening */
748 if (waitqueue_active(&db->wait))
749 wake_up(&db->wait);
750 }
751
752
753 static void
754 adc_dma_interrupt(int irq, void *dev_id, struct pt_regs *regs)
755 {
756 struct au1550_state *s = (struct au1550_state *)dev_id;
757 struct dmabuf *dp = &s->dma_adc;
758 u32 obytes;
759 char *obuf;
760
761 /* Pull the buffer from the dma queue.
762 */
763 au1xxx_dbdma_get_dest(dp->dmanr, (void *)(&obuf), &obytes);
764
765 if ((dp->count + obytes) > dp->dmasize) {
766 /* Overrun. Stop ADC and log the error
767 */
768 stop_adc(s);
769 dp->error++;
770 err("adc overrun");
771 return;
772 }
773
774 /* Put a new empty buffer on the destination DMA.
775 */
776 au1xxx_dbdma_put_dest(dp->dmanr, dp->nextIn, dp->dma_fragsize);
777
778 dp->nextIn += dp->dma_fragsize;
779 if (dp->nextIn >= dp->rawbuf + dp->dmasize)
780 dp->nextIn -= dp->dmasize;
781
782 dp->count += obytes;
783 dp->total_bytes += obytes;
784
785 /* wake up anybody listening
786 */
787 if (waitqueue_active(&dp->wait))
788 wake_up(&dp->wait);
789
790 }
791
792 static loff_t
793 au1550_llseek(struct file *file, loff_t offset, int origin)
794 {
795 return -ESPIPE;
796 }
797
798
799 static int
800 au1550_open_mixdev(struct inode *inode, struct file *file)
801 {
802 file->private_data = &au1550_state;
803 return 0;
804 }
805
806 static int
807 au1550_release_mixdev(struct inode *inode, struct file *file)
808 {
809 return 0;
810 }
811
812 static int
813 mixdev_ioctl(struct ac97_codec *codec, unsigned int cmd,
814 unsigned long arg)
815 {
816 return codec->mixer_ioctl(codec, cmd, arg);
817 }
818
819 static int
820 au1550_ioctl_mixdev(struct inode *inode, struct file *file,
821 unsigned int cmd, unsigned long arg)
822 {
823 struct au1550_state *s = (struct au1550_state *)file->private_data;
824 struct ac97_codec *codec = s->codec;
825
826 return mixdev_ioctl(codec, cmd, arg);
827 }
828
829 static /*const */ struct file_operations au1550_mixer_fops = {
830 owner:THIS_MODULE,
831 llseek:au1550_llseek,
832 ioctl:au1550_ioctl_mixdev,
833 open:au1550_open_mixdev,
834 release:au1550_release_mixdev,
835 };
836
837 static int
838 drain_dac(struct au1550_state *s, int nonblock)
839 {
840 unsigned long flags;
841 int count, tmo;
842
843 if (s->dma_dac.mapped || !s->dma_dac.ready || s->dma_dac.stopped)
844 return 0;
845
846 for (;;) {
847 spin_lock_irqsave(&s->lock, flags);
848 count = s->dma_dac.count;
849 spin_unlock_irqrestore(&s->lock, flags);
850 if (count <= s->dma_dac.fragsize)
851 break;
852 if (signal_pending(current))
853 break;
854 if (nonblock)
855 return -EBUSY;
856 tmo = 1000 * count / (s->no_vra ?
857 48000 : s->dma_dac.sample_rate);
858 tmo /= s->dma_dac.dma_bytes_per_sample;
859 au1550_delay(tmo);
860 }
861 if (signal_pending(current))
862 return -ERESTARTSYS;
863 return 0;
864 }
865
866 static inline u8 S16_TO_U8(s16 ch)
867 {
868 return (u8) (ch >> 8) + 0x80;
869 }
870 static inline s16 U8_TO_S16(u8 ch)
871 {
872 return (s16) (ch - 0x80) << 8;
873 }
874
875 /*
876 * Translates user samples to dma buffer suitable for AC'97 DAC data:
877 * If mono, copy left channel to right channel in dma buffer.
878 * If 8 bit samples, cvt to 16-bit before writing to dma buffer.
879 * If interpolating (no VRA), duplicate every audio frame src_factor times.
880 */
881 static int
882 translate_from_user(struct dmabuf *db, char* dmabuf, char* userbuf,
883 int dmacount)
884 {
885 int sample, i;
886 int interp_bytes_per_sample;
887 int num_samples;
888 int mono = (db->num_channels == 1);
889 char usersample[12];
890 s16 ch, dmasample[6];
891
892 if (db->sample_size == 16 && !mono && db->src_factor == 1) {
893 /* no translation necessary, just copy
894 */
895 if (copy_from_user(dmabuf, userbuf, dmacount))
896 return -EFAULT;
897 return dmacount;
898 }
899
900 interp_bytes_per_sample = db->dma_bytes_per_sample * db->src_factor;
901 num_samples = dmacount / interp_bytes_per_sample;
902
903 for (sample = 0; sample < num_samples; sample++) {
904 if (copy_from_user(usersample, userbuf,
905 db->user_bytes_per_sample)) {
906 return -EFAULT;
907 }
908
909 for (i = 0; i < db->num_channels; i++) {
910 if (db->sample_size == 8)
911 ch = U8_TO_S16(usersample[i]);
912 else
913 ch = *((s16 *) (&usersample[i * 2]));
914 dmasample[i] = ch;
915 if (mono)
916 dmasample[i + 1] = ch; /* right channel */
917 }
918
919 /* duplicate every audio frame src_factor times
920 */
921 for (i = 0; i < db->src_factor; i++)
922 memcpy(dmabuf, dmasample, db->dma_bytes_per_sample);
923
924 userbuf += db->user_bytes_per_sample;
925 dmabuf += interp_bytes_per_sample;
926 }
927
928 return num_samples * interp_bytes_per_sample;
929 }
930
931 /*
932 * Translates AC'97 ADC samples to user buffer:
933 * If mono, send only left channel to user buffer.
934 * If 8 bit samples, cvt from 16 to 8 bit before writing to user buffer.
935 * If decimating (no VRA), skip over src_factor audio frames.
936 */
937 static int
938 translate_to_user(struct dmabuf *db, char* userbuf, char* dmabuf,
939 int dmacount)
940 {
941 int sample, i;
942 int interp_bytes_per_sample;
943 int num_samples;
944 int mono = (db->num_channels == 1);
945 char usersample[12];
946
947 if (db->sample_size == 16 && !mono && db->src_factor == 1) {
948 /* no translation necessary, just copy
949 */
950 if (copy_to_user(userbuf, dmabuf, dmacount))
951 return -EFAULT;
952 return dmacount;
953 }
954
955 interp_bytes_per_sample = db->dma_bytes_per_sample * db->src_factor;
956 num_samples = dmacount / interp_bytes_per_sample;
957
958 for (sample = 0; sample < num_samples; sample++) {
959 for (i = 0; i < db->num_channels; i++) {
960 if (db->sample_size == 8)
961 usersample[i] =
962 S16_TO_U8(*((s16 *) (&dmabuf[i * 2])));
963 else
964 *((s16 *) (&usersample[i * 2])) =
965 *((s16 *) (&dmabuf[i * 2]));
966 }
967
968 if (copy_to_user(userbuf, usersample,
969 db->user_bytes_per_sample)) {
970 return -EFAULT;
971 }
972
973 userbuf += db->user_bytes_per_sample;
974 dmabuf += interp_bytes_per_sample;
975 }
976
977 return num_samples * interp_bytes_per_sample;
978 }
979
980 /*
981 * Copy audio data to/from user buffer from/to dma buffer, taking care
982 * that we wrap when reading/writing the dma buffer. Returns actual byte
983 * count written to or read from the dma buffer.
984 */
985 static int
986 copy_dmabuf_user(struct dmabuf *db, char* userbuf, int count, int to_user)
987 {
988 char *bufptr = to_user ? db->nextOut : db->nextIn;
989 char *bufend = db->rawbuf + db->dmasize;
990 int cnt, ret;
991
992 if (bufptr + count > bufend) {
993 int partial = (int) (bufend - bufptr);
994 if (to_user) {
995 if ((cnt = translate_to_user(db, userbuf,
996 bufptr, partial)) < 0)
997 return cnt;
998 ret = cnt;
999 if ((cnt = translate_to_user(db, userbuf + partial,
1000 db->rawbuf,
1001 count - partial)) < 0)
1002 return cnt;
1003 ret += cnt;
1004 } else {
1005 if ((cnt = translate_from_user(db, bufptr, userbuf,
1006 partial)) < 0)
1007 return cnt;
1008 ret = cnt;
1009 if ((cnt = translate_from_user(db, db->rawbuf,
1010 userbuf + partial,
1011 count - partial)) < 0)
1012 return cnt;
1013 ret += cnt;
1014 }
1015 } else {
1016 if (to_user)
1017 ret = translate_to_user(db, userbuf, bufptr, count);
1018 else
1019 ret = translate_from_user(db, bufptr, userbuf, count);
1020 }
1021
1022 return ret;
1023 }
1024
1025
1026 static ssize_t
1027 au1550_read(struct file *file, char *buffer, size_t count, loff_t *ppos)
1028 {
1029 struct au1550_state *s = (struct au1550_state *)file->private_data;
1030 struct dmabuf *db = &s->dma_adc;
1031 DECLARE_WAITQUEUE(wait, current);
1032 ssize_t ret;
1033 unsigned long flags;
1034 int cnt, usercnt, avail;
1035
1036 if (db->mapped)
1037 return -ENXIO;
1038 if (!access_ok(VERIFY_WRITE, buffer, count))
1039 return -EFAULT;
1040 ret = 0;
1041
1042 count *= db->cnt_factor;
1043
1044 down(&s->sem);
1045 add_wait_queue(&db->wait, &wait);
1046
1047 while (count > 0) {
1048 /* wait for samples in ADC dma buffer
1049 */
1050 do {
1051 if (db->stopped)
1052 start_adc(s);
1053 spin_lock_irqsave(&s->lock, flags);
1054 avail = db->count;
1055 if (avail <= 0)
1056 __set_current_state(TASK_INTERRUPTIBLE);
1057 spin_unlock_irqrestore(&s->lock, flags);
1058 if (avail <= 0) {
1059 if (file->f_flags & O_NONBLOCK) {
1060 if (!ret)
1061 ret = -EAGAIN;
1062 goto out;
1063 }
1064 up(&s->sem);
1065 schedule();
1066 if (signal_pending(current)) {
1067 if (!ret)
1068 ret = -ERESTARTSYS;
1069 goto out2;
1070 }
1071 down(&s->sem);
1072 }
1073 } while (avail <= 0);
1074
1075 /* copy from nextOut to user
1076 */
1077 if ((cnt = copy_dmabuf_user(db, buffer,
1078 count > avail ?
1079 avail : count, 1)) < 0) {
1080 if (!ret)
1081 ret = -EFAULT;
1082 goto out;
1083 }
1084
1085 spin_lock_irqsave(&s->lock, flags);
1086 db->count -= cnt;
1087 db->nextOut += cnt;
1088 if (db->nextOut >= db->rawbuf + db->dmasize)
1089 db->nextOut -= db->dmasize;
1090 spin_unlock_irqrestore(&s->lock, flags);
1091
1092 count -= cnt;
1093 usercnt = cnt / db->cnt_factor;
1094 buffer += usercnt;
1095 ret += usercnt;
1096 } /* while (count > 0) */
1097
1098 out:
1099 up(&s->sem);
1100 out2:
1101 remove_wait_queue(&db->wait, &wait);
1102 set_current_state(TASK_RUNNING);
1103 return ret;
1104 }
1105
1106 static ssize_t
1107 au1550_write(struct file *file, const char *buffer, size_t count, loff_t * ppos)
1108 {
1109 struct au1550_state *s = (struct au1550_state *)file->private_data;
1110 struct dmabuf *db = &s->dma_dac;
1111 DECLARE_WAITQUEUE(wait, current);
1112 ssize_t ret = 0;
1113 unsigned long flags;
1114 int cnt, usercnt, avail;
1115
1116 pr_debug("write: count=%d\n", count);
1117
1118 if (db->mapped)
1119 return -ENXIO;
1120 if (!access_ok(VERIFY_READ, buffer, count))
1121 return -EFAULT;
1122
1123 count *= db->cnt_factor;
1124
1125 down(&s->sem);
1126 add_wait_queue(&db->wait, &wait);
1127
1128 while (count > 0) {
1129 /* wait for space in playback buffer
1130 */
1131 do {
1132 spin_lock_irqsave(&s->lock, flags);
1133 avail = (int) db->dmasize - db->count;
1134 if (avail <= 0)
1135 __set_current_state(TASK_INTERRUPTIBLE);
1136 spin_unlock_irqrestore(&s->lock, flags);
1137 if (avail <= 0) {
1138 if (file->f_flags & O_NONBLOCK) {
1139 if (!ret)
1140 ret = -EAGAIN;
1141 goto out;
1142 }
1143 up(&s->sem);
1144 schedule();
1145 if (signal_pending(current)) {
1146 if (!ret)
1147 ret = -ERESTARTSYS;
1148 goto out2;
1149 }
1150 down(&s->sem);
1151 }
1152 } while (avail <= 0);
1153
1154 /* copy from user to nextIn
1155 */
1156 if ((cnt = copy_dmabuf_user(db, (char *) buffer,
1157 count > avail ?
1158 avail : count, 0)) < 0) {
1159 if (!ret)
1160 ret = -EFAULT;
1161 goto out;
1162 }
1163
1164 spin_lock_irqsave(&s->lock, flags);
1165 db->count += cnt;
1166 db->nextIn += cnt;
1167 if (db->nextIn >= db->rawbuf + db->dmasize)
1168 db->nextIn -= db->dmasize;
1169
1170 /* If the data is available, we want to keep two buffers
1171 * on the dma queue. If the queue count reaches zero,
1172 * we know the dma has stopped.
1173 */
1174 while ((db->dma_qcount < 2) && (db->count >= db->fragsize)) {
1175 if (au1xxx_dbdma_put_source(db->dmanr, db->nextOut,
1176 db->fragsize) == 0) {
1177 err("qcount < 2 and no ring room!");
1178 }
1179 db->nextOut += db->fragsize;
1180 if (db->nextOut >= db->rawbuf + db->dmasize)
1181 db->nextOut -= db->dmasize;
1182 db->total_bytes += db->dma_fragsize;
1183 if (db->dma_qcount == 0)
1184 start_dac(s);
1185 db->dma_qcount++;
1186 }
1187 spin_unlock_irqrestore(&s->lock, flags);
1188
1189 count -= cnt;
1190 usercnt = cnt / db->cnt_factor;
1191 buffer += usercnt;
1192 ret += usercnt;
1193 } /* while (count > 0) */
1194
1195 out:
1196 up(&s->sem);
1197 out2:
1198 remove_wait_queue(&db->wait, &wait);
1199 set_current_state(TASK_RUNNING);
1200 return ret;
1201 }
1202
1203
1204 /* No kernel lock - we have our own spinlock */
1205 static unsigned int
1206 au1550_poll(struct file *file, struct poll_table_struct *wait)
1207 {
1208 struct au1550_state *s = (struct au1550_state *)file->private_data;
1209 unsigned long flags;
1210 unsigned int mask = 0;
1211
1212 if (file->f_mode & FMODE_WRITE) {
1213 if (!s->dma_dac.ready)
1214 return 0;
1215 poll_wait(file, &s->dma_dac.wait, wait);
1216 }
1217 if (file->f_mode & FMODE_READ) {
1218 if (!s->dma_adc.ready)
1219 return 0;
1220 poll_wait(file, &s->dma_adc.wait, wait);
1221 }
1222
1223 spin_lock_irqsave(&s->lock, flags);
1224
1225 if (file->f_mode & FMODE_READ) {
1226 if (s->dma_adc.count >= (signed)s->dma_adc.dma_fragsize)
1227 mask |= POLLIN | POLLRDNORM;
1228 }
1229 if (file->f_mode & FMODE_WRITE) {
1230 if (s->dma_dac.mapped) {
1231 if (s->dma_dac.count >=
1232 (signed)s->dma_dac.dma_fragsize)
1233 mask |= POLLOUT | POLLWRNORM;
1234 } else {
1235 if ((signed) s->dma_dac.dmasize >=
1236 s->dma_dac.count + (signed)s->dma_dac.dma_fragsize)
1237 mask |= POLLOUT | POLLWRNORM;
1238 }
1239 }
1240 spin_unlock_irqrestore(&s->lock, flags);
1241 return mask;
1242 }
1243
1244 static int
1245 au1550_mmap(struct file *file, struct vm_area_struct *vma)
1246 {
1247 struct au1550_state *s = (struct au1550_state *)file->private_data;
1248 struct dmabuf *db;
1249 unsigned long size;
1250 int ret = 0;
1251
1252 lock_kernel();
1253 down(&s->sem);
1254 if (vma->vm_flags & VM_WRITE)
1255 db = &s->dma_dac;
1256 else if (vma->vm_flags & VM_READ)
1257 db = &s->dma_adc;
1258 else {
1259 ret = -EINVAL;
1260 goto out;
1261 }
1262 if (vma->vm_pgoff != 0) {
1263 ret = -EINVAL;
1264 goto out;
1265 }
1266 size = vma->vm_end - vma->vm_start;
1267 if (size > (PAGE_SIZE << db->buforder)) {
1268 ret = -EINVAL;
1269 goto out;
1270 }
1271 if (remap_pfn_range(vma, vma->vm_start, page_to_pfn(virt_to_page(db->rawbuf)),
1272 size, vma->vm_page_prot)) {
1273 ret = -EAGAIN;
1274 goto out;
1275 }
1276 vma->vm_flags &= ~VM_IO;
1277 db->mapped = 1;
1278 out:
1279 up(&s->sem);
1280 unlock_kernel();
1281 return ret;
1282 }
1283
1284 #ifdef DEBUG
1285 static struct ioctl_str_t {
1286 unsigned int cmd;
1287 const char *str;
1288 } ioctl_str[] = {
1289 {SNDCTL_DSP_RESET, "SNDCTL_DSP_RESET"},
1290 {SNDCTL_DSP_SYNC, "SNDCTL_DSP_SYNC"},
1291 {SNDCTL_DSP_SPEED, "SNDCTL_DSP_SPEED"},
1292 {SNDCTL_DSP_STEREO, "SNDCTL_DSP_STEREO"},
1293 {SNDCTL_DSP_GETBLKSIZE, "SNDCTL_DSP_GETBLKSIZE"},
1294 {SNDCTL_DSP_SAMPLESIZE, "SNDCTL_DSP_SAMPLESIZE"},
1295 {SNDCTL_DSP_CHANNELS, "SNDCTL_DSP_CHANNELS"},
1296 {SOUND_PCM_WRITE_CHANNELS, "SOUND_PCM_WRITE_CHANNELS"},
1297 {SOUND_PCM_WRITE_FILTER, "SOUND_PCM_WRITE_FILTER"},
1298 {SNDCTL_DSP_POST, "SNDCTL_DSP_POST"},
1299 {SNDCTL_DSP_SUBDIVIDE, "SNDCTL_DSP_SUBDIVIDE"},
1300 {SNDCTL_DSP_SETFRAGMENT, "SNDCTL_DSP_SETFRAGMENT"},
1301 {SNDCTL_DSP_GETFMTS, "SNDCTL_DSP_GETFMTS"},
1302 {SNDCTL_DSP_SETFMT, "SNDCTL_DSP_SETFMT"},
1303 {SNDCTL_DSP_GETOSPACE, "SNDCTL_DSP_GETOSPACE"},
1304 {SNDCTL_DSP_GETISPACE, "SNDCTL_DSP_GETISPACE"},
1305 {SNDCTL_DSP_NONBLOCK, "SNDCTL_DSP_NONBLOCK"},
1306 {SNDCTL_DSP_GETCAPS, "SNDCTL_DSP_GETCAPS"},
1307 {SNDCTL_DSP_GETTRIGGER, "SNDCTL_DSP_GETTRIGGER"},
1308 {SNDCTL_DSP_SETTRIGGER, "SNDCTL_DSP_SETTRIGGER"},
1309 {SNDCTL_DSP_GETIPTR, "SNDCTL_DSP_GETIPTR"},
1310 {SNDCTL_DSP_GETOPTR, "SNDCTL_DSP_GETOPTR"},
1311 {SNDCTL_DSP_MAPINBUF, "SNDCTL_DSP_MAPINBUF"},
1312 {SNDCTL_DSP_MAPOUTBUF, "SNDCTL_DSP_MAPOUTBUF"},
1313 {SNDCTL_DSP_SETSYNCRO, "SNDCTL_DSP_SETSYNCRO"},
1314 {SNDCTL_DSP_SETDUPLEX, "SNDCTL_DSP_SETDUPLEX"},
1315 {SNDCTL_DSP_GETODELAY, "SNDCTL_DSP_GETODELAY"},
1316 {SNDCTL_DSP_GETCHANNELMASK, "SNDCTL_DSP_GETCHANNELMASK"},
1317 {SNDCTL_DSP_BIND_CHANNEL, "SNDCTL_DSP_BIND_CHANNEL"},
1318 {OSS_GETVERSION, "OSS_GETVERSION"},
1319 {SOUND_PCM_READ_RATE, "SOUND_PCM_READ_RATE"},
1320 {SOUND_PCM_READ_CHANNELS, "SOUND_PCM_READ_CHANNELS"},
1321 {SOUND_PCM_READ_BITS, "SOUND_PCM_READ_BITS"},
1322 {SOUND_PCM_READ_FILTER, "SOUND_PCM_READ_FILTER"}
1323 };
1324 #endif
1325
1326 static int
1327 dma_count_done(struct dmabuf *db)
1328 {
1329 if (db->stopped)
1330 return 0;
1331
1332 return db->dma_fragsize - au1xxx_get_dma_residue(db->dmanr);
1333 }
1334
1335
1336 static int
1337 au1550_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
1338 unsigned long arg)
1339 {
1340 struct au1550_state *s = (struct au1550_state *)file->private_data;
1341 unsigned long flags;
1342 audio_buf_info abinfo;
1343 count_info cinfo;
1344 int count;
1345 int val, mapped, ret, diff;
1346
1347 mapped = ((file->f_mode & FMODE_WRITE) && s->dma_dac.mapped) ||
1348 ((file->f_mode & FMODE_READ) && s->dma_adc.mapped);
1349
1350 #ifdef DEBUG
1351 for (count=0; count<sizeof(ioctl_str)/sizeof(ioctl_str[0]); count++) {
1352 if (ioctl_str[count].cmd == cmd)
1353 break;
1354 }
1355 if (count < sizeof(ioctl_str) / sizeof(ioctl_str[0]))
1356 pr_debug("ioctl %s, arg=0x%lxn", ioctl_str[count].str, arg);
1357 else
1358 pr_debug("ioctl 0x%x unknown, arg=0x%lx\n", cmd, arg);
1359 #endif
1360
1361 switch (cmd) {
1362 case OSS_GETVERSION:
1363 return put_user(SOUND_VERSION, (int *) arg);
1364
1365 case SNDCTL_DSP_SYNC:
1366 if (file->f_mode & FMODE_WRITE)
1367 return drain_dac(s, file->f_flags & O_NONBLOCK);
1368 return 0;
1369
1370 case SNDCTL_DSP_SETDUPLEX:
1371 return 0;
1372
1373 case SNDCTL_DSP_GETCAPS:
1374 return put_user(DSP_CAP_DUPLEX | DSP_CAP_REALTIME |
1375 DSP_CAP_TRIGGER | DSP_CAP_MMAP, (int *)arg);
1376
1377 case SNDCTL_DSP_RESET:
1378 if (file->f_mode & FMODE_WRITE) {
1379 stop_dac(s);
1380 synchronize_irq();
1381 s->dma_dac.count = s->dma_dac.total_bytes = 0;
1382 s->dma_dac.nextIn = s->dma_dac.nextOut =
1383 s->dma_dac.rawbuf;
1384 }
1385 if (file->f_mode & FMODE_READ) {
1386 stop_adc(s);
1387 synchronize_irq();
1388 s->dma_adc.count = s->dma_adc.total_bytes = 0;
1389 s->dma_adc.nextIn = s->dma_adc.nextOut =
1390 s->dma_adc.rawbuf;
1391 }
1392 return 0;
1393
1394 case SNDCTL_DSP_SPEED:
1395 if (get_user(val, (int *) arg))
1396 return -EFAULT;
1397 if (val >= 0) {
1398 if (file->f_mode & FMODE_READ) {
1399 stop_adc(s);
1400 set_adc_rate(s, val);
1401 }
1402 if (file->f_mode & FMODE_WRITE) {
1403 stop_dac(s);
1404 set_dac_rate(s, val);
1405 }
1406 if (s->open_mode & FMODE_READ)
1407 if ((ret = prog_dmabuf_adc(s)))
1408 return ret;
1409 if (s->open_mode & FMODE_WRITE)
1410 if ((ret = prog_dmabuf_dac(s)))
1411 return ret;
1412 }
1413 return put_user((file->f_mode & FMODE_READ) ?
1414 s->dma_adc.sample_rate :
1415 s->dma_dac.sample_rate,
1416 (int *)arg);
1417
1418 case SNDCTL_DSP_STEREO:
1419 if (get_user(val, (int *) arg))
1420 return -EFAULT;
1421 if (file->f_mode & FMODE_READ) {
1422 stop_adc(s);
1423 s->dma_adc.num_channels = val ? 2 : 1;
1424 if ((ret = prog_dmabuf_adc(s)))
1425 return ret;
1426 }
1427 if (file->f_mode & FMODE_WRITE) {
1428 stop_dac(s);
1429 s->dma_dac.num_channels = val ? 2 : 1;
1430 if (s->codec_ext_caps & AC97_EXT_DACS) {
1431 /* disable surround and center/lfe in AC'97
1432 */
1433 u16 ext_stat = rdcodec(s->codec,
1434 AC97_EXTENDED_STATUS);
1435 wrcodec(s->codec, AC97_EXTENDED_STATUS,
1436 ext_stat | (AC97_EXTSTAT_PRI |
1437 AC97_EXTSTAT_PRJ |
1438 AC97_EXTSTAT_PRK));
1439 }
1440 if ((ret = prog_dmabuf_dac(s)))
1441 return ret;
1442 }
1443 return 0;
1444
1445 case SNDCTL_DSP_CHANNELS:
1446 if (get_user(val, (int *) arg))
1447 return -EFAULT;
1448 if (val != 0) {
1449 if (file->f_mode & FMODE_READ) {
1450 if (val < 0 || val > 2)
1451 return -EINVAL;
1452 stop_adc(s);
1453 s->dma_adc.num_channels = val;
1454 if ((ret = prog_dmabuf_adc(s)))
1455 return ret;
1456 }
1457 if (file->f_mode & FMODE_WRITE) {
1458 switch (val) {
1459 case 1:
1460 case 2:
1461 break;
1462 case 3:
1463 case 5:
1464 return -EINVAL;
1465 case 4:
1466 if (!(s->codec_ext_caps &
1467 AC97_EXTID_SDAC))
1468 return -EINVAL;
1469 break;
1470 case 6:
1471 if ((s->codec_ext_caps &
1472 AC97_EXT_DACS) != AC97_EXT_DACS)
1473 return -EINVAL;
1474 break;
1475 default:
1476 return -EINVAL;
1477 }
1478
1479 stop_dac(s);
1480 if (val <= 2 &&
1481 (s->codec_ext_caps & AC97_EXT_DACS)) {
1482 /* disable surround and center/lfe
1483 * channels in AC'97
1484 */
1485 u16 ext_stat =
1486 rdcodec(s->codec,
1487 AC97_EXTENDED_STATUS);
1488 wrcodec(s->codec,
1489 AC97_EXTENDED_STATUS,
1490 ext_stat | (AC97_EXTSTAT_PRI |
1491 AC97_EXTSTAT_PRJ |
1492 AC97_EXTSTAT_PRK));
1493 } else if (val >= 4) {
1494 /* enable surround, center/lfe
1495 * channels in AC'97
1496 */
1497 u16 ext_stat =
1498 rdcodec(s->codec,
1499 AC97_EXTENDED_STATUS);
1500 ext_stat &= ~AC97_EXTSTAT_PRJ;
1501 if (val == 6)
1502 ext_stat &=
1503 ~(AC97_EXTSTAT_PRI |
1504 AC97_EXTSTAT_PRK);
1505 wrcodec(s->codec,
1506 AC97_EXTENDED_STATUS,
1507 ext_stat);
1508 }
1509
1510 s->dma_dac.num_channels = val;
1511 if ((ret = prog_dmabuf_dac(s)))
1512 return ret;
1513 }
1514 }
1515 return put_user(val, (int *) arg);
1516
1517 case SNDCTL_DSP_GETFMTS: /* Returns a mask */
1518 return put_user(AFMT_S16_LE | AFMT_U8, (int *) arg);
1519
1520 case SNDCTL_DSP_SETFMT: /* Selects ONE fmt */
1521 if (get_user(val, (int *) arg))
1522 return -EFAULT;
1523 if (val != AFMT_QUERY) {
1524 if (file->f_mode & FMODE_READ) {
1525 stop_adc(s);
1526 if (val == AFMT_S16_LE)
1527 s->dma_adc.sample_size = 16;
1528 else {
1529 val = AFMT_U8;
1530 s->dma_adc.sample_size = 8;
1531 }
1532 if ((ret = prog_dmabuf_adc(s)))
1533 return ret;
1534 }
1535 if (file->f_mode & FMODE_WRITE) {
1536 stop_dac(s);
1537 if (val == AFMT_S16_LE)
1538 s->dma_dac.sample_size = 16;
1539 else {
1540 val = AFMT_U8;
1541 s->dma_dac.sample_size = 8;
1542 }
1543 if ((ret = prog_dmabuf_dac(s)))
1544 return ret;
1545 }
1546 } else {
1547 if (file->f_mode & FMODE_READ)
1548 val = (s->dma_adc.sample_size == 16) ?
1549 AFMT_S16_LE : AFMT_U8;
1550 else
1551 val = (s->dma_dac.sample_size == 16) ?
1552 AFMT_S16_LE : AFMT_U8;
1553 }
1554 return put_user(val, (int *) arg);
1555
1556 case SNDCTL_DSP_POST:
1557 return 0;
1558
1559 case SNDCTL_DSP_GETTRIGGER:
1560 val = 0;
1561 spin_lock_irqsave(&s->lock, flags);
1562 if (file->f_mode & FMODE_READ && !s->dma_adc.stopped)
1563 val |= PCM_ENABLE_INPUT;
1564 if (file->f_mode & FMODE_WRITE && !s->dma_dac.stopped)
1565 val |= PCM_ENABLE_OUTPUT;
1566 spin_unlock_irqrestore(&s->lock, flags);
1567 return put_user(val, (int *) arg);
1568
1569 case SNDCTL_DSP_SETTRIGGER:
1570 if (get_user(val, (int *) arg))
1571 return -EFAULT;
1572 if (file->f_mode & FMODE_READ) {
1573 if (val & PCM_ENABLE_INPUT)
1574 start_adc(s);
1575 else
1576 stop_adc(s);
1577 }
1578 if (file->f_mode & FMODE_WRITE) {
1579 if (val & PCM_ENABLE_OUTPUT)
1580 start_dac(s);
1581 else
1582 stop_dac(s);
1583 }
1584 return 0;
1585
1586 case SNDCTL_DSP_GETOSPACE:
1587 if (!(file->f_mode & FMODE_WRITE))
1588 return -EINVAL;
1589 abinfo.fragsize = s->dma_dac.fragsize;
1590 spin_lock_irqsave(&s->lock, flags);
1591 count = s->dma_dac.count;
1592 count -= dma_count_done(&s->dma_dac);
1593 spin_unlock_irqrestore(&s->lock, flags);
1594 if (count < 0)
1595 count = 0;
1596 abinfo.bytes = (s->dma_dac.dmasize - count) /
1597 s->dma_dac.cnt_factor;
1598 abinfo.fragstotal = s->dma_dac.numfrag;
1599 abinfo.fragments = abinfo.bytes >> s->dma_dac.fragshift;
1600 pr_debug("ioctl SNDCTL_DSP_GETOSPACE: bytes=%d, fragments=%d\n", abinfo.bytes, abinfo.fragments);
1601 return copy_to_user((void *) arg, &abinfo,
1602 sizeof(abinfo)) ? -EFAULT : 0;
1603
1604 case SNDCTL_DSP_GETISPACE:
1605 if (!(file->f_mode & FMODE_READ))
1606 return -EINVAL;
1607 abinfo.fragsize = s->dma_adc.fragsize;
1608 spin_lock_irqsave(&s->lock, flags);
1609 count = s->dma_adc.count;
1610 count += dma_count_done(&s->dma_adc);
1611 spin_unlock_irqrestore(&s->lock, flags);
1612 if (count < 0)
1613 count = 0;
1614 abinfo.bytes = count / s->dma_adc.cnt_factor;
1615 abinfo.fragstotal = s->dma_adc.numfrag;
1616 abinfo.fragments = abinfo.bytes >> s->dma_adc.fragshift;
1617 return copy_to_user((void *) arg, &abinfo,
1618 sizeof(abinfo)) ? -EFAULT : 0;
1619
1620 case SNDCTL_DSP_NONBLOCK:
1621 file->f_flags |= O_NONBLOCK;
1622 return 0;
1623
1624 case SNDCTL_DSP_GETODELAY:
1625 if (!(file->f_mode & FMODE_WRITE))
1626 return -EINVAL;
1627 spin_lock_irqsave(&s->lock, flags);
1628 count = s->dma_dac.count;
1629 count -= dma_count_done(&s->dma_dac);
1630 spin_unlock_irqrestore(&s->lock, flags);
1631 if (count < 0)
1632 count = 0;
1633 count /= s->dma_dac.cnt_factor;
1634 return put_user(count, (int *) arg);
1635
1636 case SNDCTL_DSP_GETIPTR:
1637 if (!(file->f_mode & FMODE_READ))
1638 return -EINVAL;
1639 spin_lock_irqsave(&s->lock, flags);
1640 cinfo.bytes = s->dma_adc.total_bytes;
1641 count = s->dma_adc.count;
1642 if (!s->dma_adc.stopped) {
1643 diff = dma_count_done(&s->dma_adc);
1644 count += diff;
1645 cinfo.bytes += diff;
1646 cinfo.ptr = virt_to_phys(s->dma_adc.nextIn) + diff -
1647 virt_to_phys(s->dma_adc.rawbuf);
1648 } else
1649 cinfo.ptr = virt_to_phys(s->dma_adc.nextIn) -
1650 virt_to_phys(s->dma_adc.rawbuf);
1651 if (s->dma_adc.mapped)
1652 s->dma_adc.count &= (s->dma_adc.dma_fragsize-1);
1653 spin_unlock_irqrestore(&s->lock, flags);
1654 if (count < 0)
1655 count = 0;
1656 cinfo.blocks = count >> s->dma_adc.fragshift;
1657 return copy_to_user((void *) arg, &cinfo, sizeof(cinfo));
1658
1659 case SNDCTL_DSP_GETOPTR:
1660 if (!(file->f_mode & FMODE_READ))
1661 return -EINVAL;
1662 spin_lock_irqsave(&s->lock, flags);
1663 cinfo.bytes = s->dma_dac.total_bytes;
1664 count = s->dma_dac.count;
1665 if (!s->dma_dac.stopped) {
1666 diff = dma_count_done(&s->dma_dac);
1667 count -= diff;
1668 cinfo.bytes += diff;
1669 cinfo.ptr = virt_to_phys(s->dma_dac.nextOut) + diff -
1670 virt_to_phys(s->dma_dac.rawbuf);
1671 } else
1672 cinfo.ptr = virt_to_phys(s->dma_dac.nextOut) -
1673 virt_to_phys(s->dma_dac.rawbuf);
1674 if (s->dma_dac.mapped)
1675 s->dma_dac.count &= (s->dma_dac.dma_fragsize-1);
1676 spin_unlock_irqrestore(&s->lock, flags);
1677 if (count < 0)
1678 count = 0;
1679 cinfo.blocks = count >> s->dma_dac.fragshift;
1680 return copy_to_user((void *) arg, &cinfo, sizeof(cinfo));
1681
1682 case SNDCTL_DSP_GETBLKSIZE:
1683 if (file->f_mode & FMODE_WRITE)
1684 return put_user(s->dma_dac.fragsize, (int *) arg);
1685 else
1686 return put_user(s->dma_adc.fragsize, (int *) arg);
1687
1688 case SNDCTL_DSP_SETFRAGMENT:
1689 if (get_user(val, (int *) arg))
1690 return -EFAULT;
1691 if (file->f_mode & FMODE_READ) {
1692 stop_adc(s);
1693 s->dma_adc.ossfragshift = val & 0xffff;
1694 s->dma_adc.ossmaxfrags = (val >> 16) & 0xffff;
1695 if (s->dma_adc.ossfragshift < 4)
1696 s->dma_adc.ossfragshift = 4;
1697 if (s->dma_adc.ossfragshift > 15)
1698 s->dma_adc.ossfragshift = 15;
1699 if (s->dma_adc.ossmaxfrags < 4)
1700 s->dma_adc.ossmaxfrags = 4;
1701 if ((ret = prog_dmabuf_adc(s)))
1702 return ret;
1703 }
1704 if (file->f_mode & FMODE_WRITE) {
1705 stop_dac(s);
1706 s->dma_dac.ossfragshift = val & 0xffff;
1707 s->dma_dac.ossmaxfrags = (val >> 16) & 0xffff;
1708 if (s->dma_dac.ossfragshift < 4)
1709 s->dma_dac.ossfragshift = 4;
1710 if (s->dma_dac.ossfragshift > 15)
1711 s->dma_dac.ossfragshift = 15;
1712 if (s->dma_dac.ossmaxfrags < 4)
1713 s->dma_dac.ossmaxfrags = 4;
1714 if ((ret = prog_dmabuf_dac(s)))
1715 return ret;
1716 }
1717 return 0;
1718
1719 case SNDCTL_DSP_SUBDIVIDE:
1720 if ((file->f_mode & FMODE_READ && s->dma_adc.subdivision) ||
1721 (file->f_mode & FMODE_WRITE && s->dma_dac.subdivision))
1722 return -EINVAL;
1723 if (get_user(val, (int *) arg))
1724 return -EFAULT;
1725 if (val != 1 && val != 2 && val != 4)
1726 return -EINVAL;
1727 if (file->f_mode & FMODE_READ) {
1728 stop_adc(s);
1729 s->dma_adc.subdivision = val;
1730 if ((ret = prog_dmabuf_adc(s)))
1731 return ret;
1732 }
1733 if (file->f_mode & FMODE_WRITE) {
1734 stop_dac(s);
1735 s->dma_dac.subdivision = val;
1736 if ((ret = prog_dmabuf_dac(s)))
1737 return ret;
1738 }
1739 return 0;
1740
1741 case SOUND_PCM_READ_RATE:
1742 return put_user((file->f_mode & FMODE_READ) ?
1743 s->dma_adc.sample_rate :
1744 s->dma_dac.sample_rate,
1745 (int *)arg);
1746
1747 case SOUND_PCM_READ_CHANNELS:
1748 if (file->f_mode & FMODE_READ)
1749 return put_user(s->dma_adc.num_channels, (int *)arg);
1750 else
1751 return put_user(s->dma_dac.num_channels, (int *)arg);
1752
1753 case SOUND_PCM_READ_BITS:
1754 if (file->f_mode & FMODE_READ)
1755 return put_user(s->dma_adc.sample_size, (int *)arg);
1756 else
1757 return put_user(s->dma_dac.sample_size, (int *)arg);
1758
1759 case SOUND_PCM_WRITE_FILTER:
1760 case SNDCTL_DSP_SETSYNCRO:
1761 case SOUND_PCM_READ_FILTER:
1762 return -EINVAL;
1763 }
1764
1765 return mixdev_ioctl(s->codec, cmd, arg);
1766 }
1767
1768
1769 static int
1770 au1550_open(struct inode *inode, struct file *file)
1771 {
1772 int minor = MINOR(inode->i_rdev);
1773 DECLARE_WAITQUEUE(wait, current);
1774 struct au1550_state *s = &au1550_state;
1775 int ret;
1776
1777 #ifdef DEBUG
1778 if (file->f_flags & O_NONBLOCK)
1779 pr_debug("open: non-blocking\n");
1780 else
1781 pr_debug("open: blocking\n");
1782 #endif
1783
1784 file->private_data = s;
1785 /* wait for device to become free */
1786 down(&s->open_sem);
1787 while (s->open_mode & file->f_mode) {
1788 if (file->f_flags & O_NONBLOCK) {
1789 up(&s->open_sem);
1790 return -EBUSY;
1791 }
1792 add_wait_queue(&s->open_wait, &wait);
1793 __set_current_state(TASK_INTERRUPTIBLE);
1794 up(&s->open_sem);
1795 schedule();
1796 remove_wait_queue(&s->open_wait, &wait);
1797 set_current_state(TASK_RUNNING);
1798 if (signal_pending(current))
1799 return -ERESTARTSYS;
1800 down(&s->open_sem);
1801 }
1802
1803 stop_dac(s);
1804 stop_adc(s);
1805
1806 if (file->f_mode & FMODE_READ) {
1807 s->dma_adc.ossfragshift = s->dma_adc.ossmaxfrags =
1808 s->dma_adc.subdivision = s->dma_adc.total_bytes = 0;
1809 s->dma_adc.num_channels = 1;
1810 s->dma_adc.sample_size = 8;
1811 set_adc_rate(s, 8000);
1812 if ((minor & 0xf) == SND_DEV_DSP16)
1813 s->dma_adc.sample_size = 16;
1814 }
1815
1816 if (file->f_mode & FMODE_WRITE) {
1817 s->dma_dac.ossfragshift = s->dma_dac.ossmaxfrags =
1818 s->dma_dac.subdivision = s->dma_dac.total_bytes = 0;
1819 s->dma_dac.num_channels = 1;
1820 s->dma_dac.sample_size = 8;
1821 set_dac_rate(s, 8000);
1822 if ((minor & 0xf) == SND_DEV_DSP16)
1823 s->dma_dac.sample_size = 16;
1824 }
1825
1826 if (file->f_mode & FMODE_READ) {
1827 if ((ret = prog_dmabuf_adc(s)))
1828 return ret;
1829 }
1830 if (file->f_mode & FMODE_WRITE) {
1831 if ((ret = prog_dmabuf_dac(s)))
1832 return ret;
1833 }
1834
1835 s->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
1836 up(&s->open_sem);
1837 init_MUTEX(&s->sem);
1838 return 0;
1839 }
1840
1841 static int
1842 au1550_release(struct inode *inode, struct file *file)
1843 {
1844 struct au1550_state *s = (struct au1550_state *)file->private_data;
1845
1846 lock_kernel();
1847
1848 if (file->f_mode & FMODE_WRITE) {
1849 unlock_kernel();
1850 drain_dac(s, file->f_flags & O_NONBLOCK);
1851 lock_kernel();
1852 }
1853
1854 down(&s->open_sem);
1855 if (file->f_mode & FMODE_WRITE) {
1856 stop_dac(s);
1857 kfree(s->dma_dac.rawbuf);
1858 s->dma_dac.rawbuf = NULL;
1859 }
1860 if (file->f_mode & FMODE_READ) {
1861 stop_adc(s);
1862 kfree(s->dma_adc.rawbuf);
1863 s->dma_adc.rawbuf = NULL;
1864 }
1865 s->open_mode &= ((~file->f_mode) & (FMODE_READ|FMODE_WRITE));
1866 up(&s->open_sem);
1867 wake_up(&s->open_wait);
1868 unlock_kernel();
1869 return 0;
1870 }
1871
1872 static /*const */ struct file_operations au1550_audio_fops = {
1873 owner: THIS_MODULE,
1874 llseek: au1550_llseek,
1875 read: au1550_read,
1876 write: au1550_write,
1877 poll: au1550_poll,
1878 ioctl: au1550_ioctl,
1879 mmap: au1550_mmap,
1880 open: au1550_open,
1881 release: au1550_release,
1882 };
1883
1884 MODULE_AUTHOR("Advanced Micro Devices (AMD), dan@embeddededge.com");
1885 MODULE_DESCRIPTION("Au1550 AC97 Audio Driver");
1886
1887 static int __devinit
1888 au1550_probe(void)
1889 {
1890 struct au1550_state *s = &au1550_state;
1891 int val;
1892
1893 memset(s, 0, sizeof(struct au1550_state));
1894
1895 init_waitqueue_head(&s->dma_adc.wait);
1896 init_waitqueue_head(&s->dma_dac.wait);
1897 init_waitqueue_head(&s->open_wait);
1898 init_MUTEX(&s->open_sem);
1899 spin_lock_init(&s->lock);
1900
1901 s->codec = ac97_alloc_codec();
1902 if(s->codec == NULL) {
1903 err("Out of memory");
1904 return -1;
1905 }
1906 s->codec->private_data = s;
1907 s->codec->id = 0;
1908 s->codec->codec_read = rdcodec;
1909 s->codec->codec_write = wrcodec;
1910 s->codec->codec_wait = waitcodec;
1911
1912 if (!request_mem_region(CPHYSADDR(AC97_PSC_SEL),
1913 0x30, "Au1550 AC97")) {
1914 err("AC'97 ports in use");
1915 }
1916
1917 /* Allocate the DMA Channels
1918 */
1919 if ((s->dma_dac.dmanr = au1xxx_dbdma_chan_alloc(DBDMA_MEM_CHAN,
1920 DBDMA_AC97_TX_CHAN, dac_dma_interrupt, (void *)s)) == 0) {
1921 err("Can't get DAC DMA");
1922 goto err_dma1;
1923 }
1924 au1xxx_dbdma_set_devwidth(s->dma_dac.dmanr, 16);
1925 if (au1xxx_dbdma_ring_alloc(s->dma_dac.dmanr,
1926 NUM_DBDMA_DESCRIPTORS) == 0) {
1927 err("Can't get DAC DMA descriptors");
1928 goto err_dma1;
1929 }
1930
1931 if ((s->dma_adc.dmanr = au1xxx_dbdma_chan_alloc(DBDMA_AC97_RX_CHAN,
1932 DBDMA_MEM_CHAN, adc_dma_interrupt, (void *)s)) == 0) {
1933 err("Can't get ADC DMA");
1934 goto err_dma2;
1935 }
1936 au1xxx_dbdma_set_devwidth(s->dma_adc.dmanr, 16);
1937 if (au1xxx_dbdma_ring_alloc(s->dma_adc.dmanr,
1938 NUM_DBDMA_DESCRIPTORS) == 0) {
1939 err("Can't get ADC DMA descriptors");
1940 goto err_dma2;
1941 }
1942
1943 pr_info("DAC: DMA%d, ADC: DMA%d", DBDMA_AC97_TX_CHAN, DBDMA_AC97_RX_CHAN);
1944
1945 /* register devices */
1946
1947 if ((s->dev_audio = register_sound_dsp(&au1550_audio_fops, -1)) < 0)
1948 goto err_dev1;
1949 if ((s->codec->dev_mixer =
1950 register_sound_mixer(&au1550_mixer_fops, -1)) < 0)
1951 goto err_dev2;
1952
1953 /* The GPIO for the appropriate PSC was configured by the
1954 * board specific start up.
1955 *
1956 * configure PSC for AC'97
1957 */
1958 au_writel(0, AC97_PSC_CTRL); /* Disable PSC */
1959 au_sync();
1960 au_writel((PSC_SEL_CLK_SERCLK | PSC_SEL_PS_AC97MODE), AC97_PSC_SEL);
1961 au_sync();
1962
1963 /* cold reset the AC'97
1964 */
1965 au_writel(PSC_AC97RST_RST, PSC_AC97RST);
1966 au_sync();
1967 au1550_delay(10);
1968 au_writel(0, PSC_AC97RST);
1969 au_sync();
1970
1971 /* need to delay around 500msec(bleech) to give
1972 some CODECs enough time to wakeup */
1973 au1550_delay(500);
1974
1975 /* warm reset the AC'97 to start the bitclk
1976 */
1977 au_writel(PSC_AC97RST_SNC, PSC_AC97RST);
1978 au_sync();
1979 udelay(100);
1980 au_writel(0, PSC_AC97RST);
1981 au_sync();
1982
1983 /* Enable PSC
1984 */
1985 au_writel(PSC_CTRL_ENABLE, AC97_PSC_CTRL);
1986 au_sync();
1987
1988 /* Wait for PSC ready.
1989 */
1990 do {
1991 val = readl((void *)PSC_AC97STAT);
1992 au_sync();
1993 } while ((val & PSC_AC97STAT_SR) == 0);
1994
1995 /* Configure AC97 controller.
1996 * Deep FIFO, 16-bit sample, DMA, make sure DMA matches fifo size.
1997 */
1998 val = PSC_AC97CFG_SET_LEN(16);
1999 val |= PSC_AC97CFG_RT_FIFO8 | PSC_AC97CFG_TT_FIFO8;
2000
2001 /* Enable device so we can at least
2002 * talk over the AC-link.
2003 */
2004 au_writel(val, PSC_AC97CFG);
2005 au_writel(PSC_AC97MSK_ALLMASK, PSC_AC97MSK);
2006 au_sync();
2007 val |= PSC_AC97CFG_DE_ENABLE;
2008 au_writel(val, PSC_AC97CFG);
2009 au_sync();
2010
2011 /* Wait for Device ready.
2012 */
2013 do {
2014 val = readl((void *)PSC_AC97STAT);
2015 au_sync();
2016 } while ((val & PSC_AC97STAT_DR) == 0);
2017
2018 /* codec init */
2019 if (!ac97_probe_codec(s->codec))
2020 goto err_dev3;
2021
2022 s->codec_base_caps = rdcodec(s->codec, AC97_RESET);
2023 s->codec_ext_caps = rdcodec(s->codec, AC97_EXTENDED_ID);
2024 pr_info("AC'97 Base/Extended ID = %04x/%04x",
2025 s->codec_base_caps, s->codec_ext_caps);
2026
2027 if (!(s->codec_ext_caps & AC97_EXTID_VRA)) {
2028 /* codec does not support VRA
2029 */
2030 s->no_vra = 1;
2031 } else if (!vra) {
2032 /* Boot option says disable VRA
2033 */
2034 u16 ac97_extstat = rdcodec(s->codec, AC97_EXTENDED_STATUS);
2035 wrcodec(s->codec, AC97_EXTENDED_STATUS,
2036 ac97_extstat & ~AC97_EXTSTAT_VRA);
2037 s->no_vra = 1;
2038 }
2039 if (s->no_vra)
2040 pr_info("no VRA, interpolating and decimating");
2041
2042 /* set mic to be the recording source */
2043 val = SOUND_MASK_MIC;
2044 mixdev_ioctl(s->codec, SOUND_MIXER_WRITE_RECSRC,
2045 (unsigned long) &val);
2046
2047 return 0;
2048
2049 err_dev3:
2050 unregister_sound_mixer(s->codec->dev_mixer);
2051 err_dev2:
2052 unregister_sound_dsp(s->dev_audio);
2053 err_dev1:
2054 au1xxx_dbdma_chan_free(s->dma_adc.dmanr);
2055 err_dma2:
2056 au1xxx_dbdma_chan_free(s->dma_dac.dmanr);
2057 err_dma1:
2058 release_mem_region(CPHYSADDR(AC97_PSC_SEL), 0x30);
2059
2060 ac97_release_codec(s->codec);
2061 return -1;
2062 }
2063
2064 static void __devinit
2065 au1550_remove(void)
2066 {
2067 struct au1550_state *s = &au1550_state;
2068
2069 if (!s)
2070 return;
2071 synchronize_irq();
2072 au1xxx_dbdma_chan_free(s->dma_adc.dmanr);
2073 au1xxx_dbdma_chan_free(s->dma_dac.dmanr);
2074 release_mem_region(CPHYSADDR(AC97_PSC_SEL), 0x30);
2075 unregister_sound_dsp(s->dev_audio);
2076 unregister_sound_mixer(s->codec->dev_mixer);
2077 ac97_release_codec(s->codec);
2078 }
2079
2080 static int __init
2081 init_au1550(void)
2082 {
2083 return au1550_probe();
2084 }
2085
2086 static void __exit
2087 cleanup_au1550(void)
2088 {
2089 au1550_remove();
2090 }
2091
2092 module_init(init_au1550);
2093 module_exit(cleanup_au1550);
2094
2095 #ifndef MODULE
2096
2097 static int __init
2098 au1550_setup(char *options)
2099 {
2100 char *this_opt;
2101
2102 if (!options || !*options)
2103 return 0;
2104
2105 while ((this_opt = strsep(&options, ","))) {
2106 if (!*this_opt)
2107 continue;
2108 if (!strncmp(this_opt, "vra", 3)) {
2109 vra = 1;
2110 }
2111 }
2112
2113 return 1;
2114 }
2115
2116 __setup("au1550_audio=", au1550_setup);
2117
2118 #endif /* MODULE */
Linux 2.6 ibm-acpi/thinkpad-acpi driver git tree