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VIRTIO: Use __skb_queue_purge()
[linux-2.6/mini2440.git] / sound / oss / au1550_ac97.c
blob23018a7c063a3fc553aa73ef29159cbe9d317012
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/bitops.h>
51 #include <linux/spinlock.h>
52 #include <linux/smp_lock.h>
53 #include <linux/ac97_codec.h>
54 #include <linux/mutex.h>
55
56 #include <asm/io.h>
57 #include <asm/uaccess.h>
58 #include <asm/hardirq.h>
59 #include <asm/mach-au1x00/au1xxx_psc.h>
60 #include <asm/mach-au1x00/au1xxx_dbdma.h>
61 #include <asm/mach-au1x00/au1xxx.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_param(vra, bool, 0);
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 mutex open_mutex;
95 struct mutex 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 data = 0;
216 goto out;
217 }
218
219 /* wait for command done?
220 */
221 for (i = 0; i < POLL_COUNT; i++) {
222 val = au_readl(PSC_AC97EVNT);
223 au_sync();
224 if (val & PSC_AC97EVNT_CD)
225 break;
226 }
227 if (i == POLL_COUNT) {
228 err("rdcodec: read cmdwait expired!");
229 data = 0;
230 goto out;
231 }
232
233 data = au_readl(PSC_AC97CDC) & 0xffff;
234 au_sync();
235
236 /* Clear command done event.
237 */
238 au_writel(PSC_AC97EVNT_CD, PSC_AC97EVNT);
239 au_sync();
240
241 out:
242 spin_unlock_irqrestore(&s->lock, flags);
243
244 return data;
245 }
246
247
248 static void
249 wrcodec(struct ac97_codec *codec, u8 addr, u16 data)
250 {
251 struct au1550_state *s = (struct au1550_state *)codec->private_data;
252 unsigned long flags;
253 u32 cmd, val;
254 int i;
255
256 spin_lock_irqsave(&s->lock, flags);
257
258 for (i = 0; i < POLL_COUNT; i++) {
259 val = au_readl(PSC_AC97STAT);
260 au_sync();
261 if (!(val & PSC_AC97STAT_CP))
262 break;
263 }
264 if (i == POLL_COUNT)
265 err("wrcodec: codec cmd pending expired!");
266
267 cmd = (u32)PSC_AC97CDC_INDX(addr);
268 cmd |= (u32)data;
269 au_writel(cmd, PSC_AC97CDC);
270 au_sync();
271
272 for (i = 0; i < POLL_COUNT; i++) {
273 val = au_readl(PSC_AC97STAT);
274 au_sync();
275 if (!(val & PSC_AC97STAT_CP))
276 break;
277 }
278 if (i == POLL_COUNT)
279 err("wrcodec: codec cmd pending expired!");
280
281 for (i = 0; i < POLL_COUNT; i++) {
282 val = au_readl(PSC_AC97EVNT);
283 au_sync();
284 if (val & PSC_AC97EVNT_CD)
285 break;
286 }
287 if (i == POLL_COUNT)
288 err("wrcodec: read cmdwait expired!");
289
290 /* Clear command done event.
291 */
292 au_writel(PSC_AC97EVNT_CD, PSC_AC97EVNT);
293 au_sync();
294
295 spin_unlock_irqrestore(&s->lock, flags);
296 }
297
298 static void
299 waitcodec(struct ac97_codec *codec)
300 {
301 u16 temp;
302 u32 val;
303 int i;
304
305 /* codec_wait is used to wait for a ready state after
306 * an AC97C_RESET.
307 */
308 au1550_delay(10);
309
310 /* first poll the CODEC_READY tag bit
311 */
312 for (i = 0; i < POLL_COUNT; i++) {
313 val = au_readl(PSC_AC97STAT);
314 au_sync();
315 if (val & PSC_AC97STAT_CR)
316 break;
317 }
318 if (i == POLL_COUNT) {
319 err("waitcodec: CODEC_READY poll expired!");
320 return;
321 }
322
323 /* get AC'97 powerdown control/status register
324 */
325 temp = rdcodec(codec, AC97_POWER_CONTROL);
326
327 /* If anything is powered down, power'em up
328 */
329 if (temp & 0x7f00) {
330 /* Power on
331 */
332 wrcodec(codec, AC97_POWER_CONTROL, 0);
333 au1550_delay(100);
334
335 /* Reread
336 */
337 temp = rdcodec(codec, AC97_POWER_CONTROL);
338 }
339
340 /* Check if Codec REF,ANL,DAC,ADC ready
341 */
342 if ((temp & 0x7f0f) != 0x000f)
343 err("codec reg 26 status (0x%x) not ready!!", temp);
344 }
345
346 /* stop the ADC before calling */
347 static void
348 set_adc_rate(struct au1550_state *s, unsigned rate)
349 {
350 struct dmabuf *adc = &s->dma_adc;
351 struct dmabuf *dac = &s->dma_dac;
352 unsigned adc_rate, dac_rate;
353 u16 ac97_extstat;
354
355 if (s->no_vra) {
356 /* calc SRC factor
357 */
358 adc->src_factor = ((96000 / rate) + 1) >> 1;
359 adc->sample_rate = 48000 / adc->src_factor;
360 return;
361 }
362
363 adc->src_factor = 1;
364
365 ac97_extstat = rdcodec(s->codec, AC97_EXTENDED_STATUS);
366
367 rate = rate > 48000 ? 48000 : rate;
368
369 /* enable VRA
370 */
371 wrcodec(s->codec, AC97_EXTENDED_STATUS,
372 ac97_extstat | AC97_EXTSTAT_VRA);
373
374 /* now write the sample rate
375 */
376 wrcodec(s->codec, AC97_PCM_LR_ADC_RATE, (u16) rate);
377
378 /* read it back for actual supported rate
379 */
380 adc_rate = rdcodec(s->codec, AC97_PCM_LR_ADC_RATE);
381
382 pr_debug("set_adc_rate: set to %d Hz\n", adc_rate);
383
384 /* some codec's don't allow unequal DAC and ADC rates, in which case
385 * writing one rate reg actually changes both.
386 */
387 dac_rate = rdcodec(s->codec, AC97_PCM_FRONT_DAC_RATE);
388 if (dac->num_channels > 2)
389 wrcodec(s->codec, AC97_PCM_SURR_DAC_RATE, dac_rate);
390 if (dac->num_channels > 4)
391 wrcodec(s->codec, AC97_PCM_LFE_DAC_RATE, dac_rate);
392
393 adc->sample_rate = adc_rate;
394 dac->sample_rate = dac_rate;
395 }
396
397 /* stop the DAC before calling */
398 static void
399 set_dac_rate(struct au1550_state *s, unsigned rate)
400 {
401 struct dmabuf *dac = &s->dma_dac;
402 struct dmabuf *adc = &s->dma_adc;
403 unsigned adc_rate, dac_rate;
404 u16 ac97_extstat;
405
406 if (s->no_vra) {
407 /* calc SRC factor
408 */
409 dac->src_factor = ((96000 / rate) + 1) >> 1;
410 dac->sample_rate = 48000 / dac->src_factor;
411 return;
412 }
413
414 dac->src_factor = 1;
415
416 ac97_extstat = rdcodec(s->codec, AC97_EXTENDED_STATUS);
417
418 rate = rate > 48000 ? 48000 : rate;
419
420 /* enable VRA
421 */
422 wrcodec(s->codec, AC97_EXTENDED_STATUS,
423 ac97_extstat | AC97_EXTSTAT_VRA);
424
425 /* now write the sample rate
426 */
427 wrcodec(s->codec, AC97_PCM_FRONT_DAC_RATE, (u16) rate);
428
429 /* I don't support different sample rates for multichannel,
430 * so make these channels the same.
431 */
432 if (dac->num_channels > 2)
433 wrcodec(s->codec, AC97_PCM_SURR_DAC_RATE, (u16) rate);
434 if (dac->num_channels > 4)
435 wrcodec(s->codec, AC97_PCM_LFE_DAC_RATE, (u16) rate);
436 /* read it back for actual supported rate
437 */
438 dac_rate = rdcodec(s->codec, AC97_PCM_FRONT_DAC_RATE);
439
440 pr_debug("set_dac_rate: set to %d Hz\n", dac_rate);
441
442 /* some codec's don't allow unequal DAC and ADC rates, in which case
443 * writing one rate reg actually changes both.
444 */
445 adc_rate = rdcodec(s->codec, AC97_PCM_LR_ADC_RATE);
446
447 dac->sample_rate = dac_rate;
448 adc->sample_rate = adc_rate;
449 }
450
451 static void
452 stop_dac(struct au1550_state *s)
453 {
454 struct dmabuf *db = &s->dma_dac;
455 u32 stat;
456 unsigned long flags;
457
458 if (db->stopped)
459 return;
460
461 spin_lock_irqsave(&s->lock, flags);
462
463 au_writel(PSC_AC97PCR_TP, PSC_AC97PCR);
464 au_sync();
465
466 /* Wait for Transmit Busy to show disabled.
467 */
468 do {
469 stat = au_readl(PSC_AC97STAT);
470 au_sync();
471 } while ((stat & PSC_AC97STAT_TB) != 0);
472
473 au1xxx_dbdma_reset(db->dmanr);
474
475 db->stopped = 1;
476
477 spin_unlock_irqrestore(&s->lock, flags);
478 }
479
480 static void
481 stop_adc(struct au1550_state *s)
482 {
483 struct dmabuf *db = &s->dma_adc;
484 unsigned long flags;
485 u32 stat;
486
487 if (db->stopped)
488 return;
489
490 spin_lock_irqsave(&s->lock, flags);
491
492 au_writel(PSC_AC97PCR_RP, PSC_AC97PCR);
493 au_sync();
494
495 /* Wait for Receive Busy to show disabled.
496 */
497 do {
498 stat = au_readl(PSC_AC97STAT);
499 au_sync();
500 } while ((stat & PSC_AC97STAT_RB) != 0);
501
502 au1xxx_dbdma_reset(db->dmanr);
503
504 db->stopped = 1;
505
506 spin_unlock_irqrestore(&s->lock, flags);
507 }
508
509
510 static void
511 set_xmit_slots(int num_channels)
512 {
513 u32 ac97_config, stat;
514
515 ac97_config = au_readl(PSC_AC97CFG);
516 au_sync();
517 ac97_config &= ~(PSC_AC97CFG_TXSLOT_MASK | PSC_AC97CFG_DE_ENABLE);
518 au_writel(ac97_config, PSC_AC97CFG);
519 au_sync();
520
521 switch (num_channels) {
522 case 6: /* stereo with surround and center/LFE,
523 * slots 3,4,6,7,8,9
524 */
525 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(6);
526 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(9);
527
528 case 4: /* stereo with surround, slots 3,4,7,8 */
529 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(7);
530 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(8);
531
532 case 2: /* stereo, slots 3,4 */
533 case 1: /* mono */
534 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(3);
535 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(4);
536 }
537
538 au_writel(ac97_config, PSC_AC97CFG);
539 au_sync();
540
541 ac97_config |= PSC_AC97CFG_DE_ENABLE;
542 au_writel(ac97_config, PSC_AC97CFG);
543 au_sync();
544
545 /* Wait for Device ready.
546 */
547 do {
548 stat = au_readl(PSC_AC97STAT);
549 au_sync();
550 } while ((stat & PSC_AC97STAT_DR) == 0);
551 }
552
553 static void
554 set_recv_slots(int num_channels)
555 {
556 u32 ac97_config, stat;
557
558 ac97_config = au_readl(PSC_AC97CFG);
559 au_sync();
560 ac97_config &= ~(PSC_AC97CFG_RXSLOT_MASK | PSC_AC97CFG_DE_ENABLE);
561 au_writel(ac97_config, PSC_AC97CFG);
562 au_sync();
563
564 /* Always enable slots 3 and 4 (stereo). Slot 6 is
565 * optional Mic ADC, which we don't support yet.
566 */
567 ac97_config |= PSC_AC97CFG_RXSLOT_ENA(3);
568 ac97_config |= PSC_AC97CFG_RXSLOT_ENA(4);
569
570 au_writel(ac97_config, PSC_AC97CFG);
571 au_sync();
572
573 ac97_config |= PSC_AC97CFG_DE_ENABLE;
574 au_writel(ac97_config, PSC_AC97CFG);
575 au_sync();
576
577 /* Wait for Device ready.
578 */
579 do {
580 stat = au_readl(PSC_AC97STAT);
581 au_sync();
582 } while ((stat & PSC_AC97STAT_DR) == 0);
583 }
584
585 /* Hold spinlock for both start_dac() and start_adc() calls */
586 static void
587 start_dac(struct au1550_state *s)
588 {
589 struct dmabuf *db = &s->dma_dac;
590
591 if (!db->stopped)
592 return;
593
594 set_xmit_slots(db->num_channels);
595 au_writel(PSC_AC97PCR_TC, PSC_AC97PCR);
596 au_sync();
597 au_writel(PSC_AC97PCR_TS, PSC_AC97PCR);
598 au_sync();
599
600 au1xxx_dbdma_start(db->dmanr);
601
602 db->stopped = 0;
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 static void dac_dma_interrupt(int irq, void *dev_id)
722 {
723 struct au1550_state *s = (struct au1550_state *) dev_id;
724 struct dmabuf *db = &s->dma_dac;
725 u32 ac97c_stat;
726
727 spin_lock(&s->lock);
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 spin_unlock(&s->lock);
752 }
753
754
755 static void adc_dma_interrupt(int irq, void *dev_id)
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 spin_lock(&s->lock);
763
764 /* Pull the buffer from the dma queue.
765 */
766 au1xxx_dbdma_get_dest(dp->dmanr, (void *)(&obuf), &obytes);
767
768 if ((dp->count + obytes) > dp->dmasize) {
769 /* Overrun. Stop ADC and log the error
770 */
771 spin_unlock(&s->lock);
772 stop_adc(s);
773 dp->error++;
774 err("adc overrun");
775 return;
776 }
777
778 /* Put a new empty buffer on the destination DMA.
779 */
780 au1xxx_dbdma_put_dest(dp->dmanr, dp->nextIn, dp->dma_fragsize);
781
782 dp->nextIn += dp->dma_fragsize;
783 if (dp->nextIn >= dp->rawbuf + dp->dmasize)
784 dp->nextIn -= dp->dmasize;
785
786 dp->count += obytes;
787 dp->total_bytes += obytes;
788
789 /* wake up anybody listening
790 */
791 if (waitqueue_active(&dp->wait))
792 wake_up(&dp->wait);
793
794 spin_unlock(&s->lock);
795 }
796
797 static loff_t
798 au1550_llseek(struct file *file, loff_t offset, int origin)
799 {
800 return -ESPIPE;
801 }
802
803
804 static int
805 au1550_open_mixdev(struct inode *inode, struct file *file)
806 {
807 file->private_data = &au1550_state;
808 return 0;
809 }
810
811 static int
812 au1550_release_mixdev(struct inode *inode, struct file *file)
813 {
814 return 0;
815 }
816
817 static int
818 mixdev_ioctl(struct ac97_codec *codec, unsigned int cmd,
819 unsigned long arg)
820 {
821 return codec->mixer_ioctl(codec, cmd, arg);
822 }
823
824 static int
825 au1550_ioctl_mixdev(struct inode *inode, struct file *file,
826 unsigned int cmd, unsigned long arg)
827 {
828 struct au1550_state *s = (struct au1550_state *)file->private_data;
829 struct ac97_codec *codec = s->codec;
830
831 return mixdev_ioctl(codec, cmd, arg);
832 }
833
834 static /*const */ struct file_operations au1550_mixer_fops = {
835 owner:THIS_MODULE,
836 llseek:au1550_llseek,
837 ioctl:au1550_ioctl_mixdev,
838 open:au1550_open_mixdev,
839 release:au1550_release_mixdev,
840 };
841
842 static int
843 drain_dac(struct au1550_state *s, int nonblock)
844 {
845 unsigned long flags;
846 int count, tmo;
847
848 if (s->dma_dac.mapped || !s->dma_dac.ready || s->dma_dac.stopped)
849 return 0;
850
851 for (;;) {
852 spin_lock_irqsave(&s->lock, flags);
853 count = s->dma_dac.count;
854 spin_unlock_irqrestore(&s->lock, flags);
855 if (count <= s->dma_dac.fragsize)
856 break;
857 if (signal_pending(current))
858 break;
859 if (nonblock)
860 return -EBUSY;
861 tmo = 1000 * count / (s->no_vra ?
862 48000 : s->dma_dac.sample_rate);
863 tmo /= s->dma_dac.dma_bytes_per_sample;
864 au1550_delay(tmo);
865 }
866 if (signal_pending(current))
867 return -ERESTARTSYS;
868 return 0;
869 }
870
871 static inline u8 S16_TO_U8(s16 ch)
872 {
873 return (u8) (ch >> 8) + 0x80;
874 }
875 static inline s16 U8_TO_S16(u8 ch)
876 {
877 return (s16) (ch - 0x80) << 8;
878 }
879
880 /*
881 * Translates user samples to dma buffer suitable for AC'97 DAC data:
882 * If mono, copy left channel to right channel in dma buffer.
883 * If 8 bit samples, cvt to 16-bit before writing to dma buffer.
884 * If interpolating (no VRA), duplicate every audio frame src_factor times.
885 */
886 static int
887 translate_from_user(struct dmabuf *db, char* dmabuf, char* userbuf,
888 int dmacount)
889 {
890 int sample, i;
891 int interp_bytes_per_sample;
892 int num_samples;
893 int mono = (db->num_channels == 1);
894 char usersample[12];
895 s16 ch, dmasample[6];
896
897 if (db->sample_size == 16 && !mono && db->src_factor == 1) {
898 /* no translation necessary, just copy
899 */
900 if (copy_from_user(dmabuf, userbuf, dmacount))
901 return -EFAULT;
902 return dmacount;
903 }
904
905 interp_bytes_per_sample = db->dma_bytes_per_sample * db->src_factor;
906 num_samples = dmacount / interp_bytes_per_sample;
907
908 for (sample = 0; sample < num_samples; sample++) {
909 if (copy_from_user(usersample, userbuf,
910 db->user_bytes_per_sample)) {
911 return -EFAULT;
912 }
913
914 for (i = 0; i < db->num_channels; i++) {
915 if (db->sample_size == 8)
916 ch = U8_TO_S16(usersample[i]);
917 else
918 ch = *((s16 *) (&usersample[i * 2]));
919 dmasample[i] = ch;
920 if (mono)
921 dmasample[i + 1] = ch; /* right channel */
922 }
923
924 /* duplicate every audio frame src_factor times
925 */
926 for (i = 0; i < db->src_factor; i++)
927 memcpy(dmabuf, dmasample, db->dma_bytes_per_sample);
928
929 userbuf += db->user_bytes_per_sample;
930 dmabuf += interp_bytes_per_sample;
931 }
932
933 return num_samples * interp_bytes_per_sample;
934 }
935
936 /*
937 * Translates AC'97 ADC samples to user buffer:
938 * If mono, send only left channel to user buffer.
939 * If 8 bit samples, cvt from 16 to 8 bit before writing to user buffer.
940 * If decimating (no VRA), skip over src_factor audio frames.
941 */
942 static int
943 translate_to_user(struct dmabuf *db, char* userbuf, char* dmabuf,
944 int dmacount)
945 {
946 int sample, i;
947 int interp_bytes_per_sample;
948 int num_samples;
949 int mono = (db->num_channels == 1);
950 char usersample[12];
951
952 if (db->sample_size == 16 && !mono && db->src_factor == 1) {
953 /* no translation necessary, just copy
954 */
955 if (copy_to_user(userbuf, dmabuf, dmacount))
956 return -EFAULT;
957 return dmacount;
958 }
959
960 interp_bytes_per_sample = db->dma_bytes_per_sample * db->src_factor;
961 num_samples = dmacount / interp_bytes_per_sample;
962
963 for (sample = 0; sample < num_samples; sample++) {
964 for (i = 0; i < db->num_channels; i++) {
965 if (db->sample_size == 8)
966 usersample[i] =
967 S16_TO_U8(*((s16 *) (&dmabuf[i * 2])));
968 else
969 *((s16 *) (&usersample[i * 2])) =
970 *((s16 *) (&dmabuf[i * 2]));
971 }
972
973 if (copy_to_user(userbuf, usersample,
974 db->user_bytes_per_sample)) {
975 return -EFAULT;
976 }
977
978 userbuf += db->user_bytes_per_sample;
979 dmabuf += interp_bytes_per_sample;
980 }
981
982 return num_samples * interp_bytes_per_sample;
983 }
984
985 /*
986 * Copy audio data to/from user buffer from/to dma buffer, taking care
987 * that we wrap when reading/writing the dma buffer. Returns actual byte
988 * count written to or read from the dma buffer.
989 */
990 static int
991 copy_dmabuf_user(struct dmabuf *db, char* userbuf, int count, int to_user)
992 {
993 char *bufptr = to_user ? db->nextOut : db->nextIn;
994 char *bufend = db->rawbuf + db->dmasize;
995 int cnt, ret;
996
997 if (bufptr + count > bufend) {
998 int partial = (int) (bufend - bufptr);
999 if (to_user) {
1000 if ((cnt = translate_to_user(db, userbuf,
1001 bufptr, partial)) < 0)
1002 return cnt;
1003 ret = cnt;
1004 if ((cnt = translate_to_user(db, userbuf + partial,
1005 db->rawbuf,
1006 count - partial)) < 0)
1007 return cnt;
1008 ret += cnt;
1009 } else {
1010 if ((cnt = translate_from_user(db, bufptr, userbuf,
1011 partial)) < 0)
1012 return cnt;
1013 ret = cnt;
1014 if ((cnt = translate_from_user(db, db->rawbuf,
1015 userbuf + partial,
1016 count - partial)) < 0)
1017 return cnt;
1018 ret += cnt;
1019 }
1020 } else {
1021 if (to_user)
1022 ret = translate_to_user(db, userbuf, bufptr, count);
1023 else
1024 ret = translate_from_user(db, bufptr, userbuf, count);
1025 }
1026
1027 return ret;
1028 }
1029
1030
1031 static ssize_t
1032 au1550_read(struct file *file, char *buffer, size_t count, loff_t *ppos)
1033 {
1034 struct au1550_state *s = (struct au1550_state *)file->private_data;
1035 struct dmabuf *db = &s->dma_adc;
1036 DECLARE_WAITQUEUE(wait, current);
1037 ssize_t ret;
1038 unsigned long flags;
1039 int cnt, usercnt, avail;
1040
1041 if (db->mapped)
1042 return -ENXIO;
1043 if (!access_ok(VERIFY_WRITE, buffer, count))
1044 return -EFAULT;
1045 ret = 0;
1046
1047 count *= db->cnt_factor;
1048
1049 mutex_lock(&s->sem);
1050 add_wait_queue(&db->wait, &wait);
1051
1052 while (count > 0) {
1053 /* wait for samples in ADC dma buffer
1054 */
1055 do {
1056 spin_lock_irqsave(&s->lock, flags);
1057 if (db->stopped)
1058 start_adc(s);
1059 avail = db->count;
1060 if (avail <= 0)
1061 __set_current_state(TASK_INTERRUPTIBLE);
1062 spin_unlock_irqrestore(&s->lock, flags);
1063 if (avail <= 0) {
1064 if (file->f_flags & O_NONBLOCK) {
1065 if (!ret)
1066 ret = -EAGAIN;
1067 goto out;
1068 }
1069 mutex_unlock(&s->sem);
1070 schedule();
1071 if (signal_pending(current)) {
1072 if (!ret)
1073 ret = -ERESTARTSYS;
1074 goto out2;
1075 }
1076 mutex_lock(&s->sem);
1077 }
1078 } while (avail <= 0);
1079
1080 /* copy from nextOut to user
1081 */
1082 if ((cnt = copy_dmabuf_user(db, buffer,
1083 count > avail ?
1084 avail : count, 1)) < 0) {
1085 if (!ret)
1086 ret = -EFAULT;
1087 goto out;
1088 }
1089
1090 spin_lock_irqsave(&s->lock, flags);
1091 db->count -= cnt;
1092 db->nextOut += cnt;
1093 if (db->nextOut >= db->rawbuf + db->dmasize)
1094 db->nextOut -= db->dmasize;
1095 spin_unlock_irqrestore(&s->lock, flags);
1096
1097 count -= cnt;
1098 usercnt = cnt / db->cnt_factor;
1099 buffer += usercnt;
1100 ret += usercnt;
1101 } /* while (count > 0) */
1102
1103 out:
1104 mutex_unlock(&s->sem);
1105 out2:
1106 remove_wait_queue(&db->wait, &wait);
1107 set_current_state(TASK_RUNNING);
1108 return ret;
1109 }
1110
1111 static ssize_t
1112 au1550_write(struct file *file, const char *buffer, size_t count, loff_t * ppos)
1113 {
1114 struct au1550_state *s = (struct au1550_state *)file->private_data;
1115 struct dmabuf *db = &s->dma_dac;
1116 DECLARE_WAITQUEUE(wait, current);
1117 ssize_t ret = 0;
1118 unsigned long flags;
1119 int cnt, usercnt, avail;
1120
1121 pr_debug("write: count=%d\n", count);
1122
1123 if (db->mapped)
1124 return -ENXIO;
1125 if (!access_ok(VERIFY_READ, buffer, count))
1126 return -EFAULT;
1127
1128 count *= db->cnt_factor;
1129
1130 mutex_lock(&s->sem);
1131 add_wait_queue(&db->wait, &wait);
1132
1133 while (count > 0) {
1134 /* wait for space in playback buffer
1135 */
1136 do {
1137 spin_lock_irqsave(&s->lock, flags);
1138 avail = (int) db->dmasize - db->count;
1139 if (avail <= 0)
1140 __set_current_state(TASK_INTERRUPTIBLE);
1141 spin_unlock_irqrestore(&s->lock, flags);
1142 if (avail <= 0) {
1143 if (file->f_flags & O_NONBLOCK) {
1144 if (!ret)
1145 ret = -EAGAIN;
1146 goto out;
1147 }
1148 mutex_unlock(&s->sem);
1149 schedule();
1150 if (signal_pending(current)) {
1151 if (!ret)
1152 ret = -ERESTARTSYS;
1153 goto out2;
1154 }
1155 mutex_lock(&s->sem);
1156 }
1157 } while (avail <= 0);
1158
1159 /* copy from user to nextIn
1160 */
1161 if ((cnt = copy_dmabuf_user(db, (char *) buffer,
1162 count > avail ?
1163 avail : count, 0)) < 0) {
1164 if (!ret)
1165 ret = -EFAULT;
1166 goto out;
1167 }
1168
1169 spin_lock_irqsave(&s->lock, flags);
1170 db->count += cnt;
1171 db->nextIn += cnt;
1172 if (db->nextIn >= db->rawbuf + db->dmasize)
1173 db->nextIn -= db->dmasize;
1174
1175 /* If the data is available, we want to keep two buffers
1176 * on the dma queue. If the queue count reaches zero,
1177 * we know the dma has stopped.
1178 */
1179 while ((db->dma_qcount < 2) && (db->count >= db->fragsize)) {
1180 if (au1xxx_dbdma_put_source(db->dmanr, db->nextOut,
1181 db->fragsize) == 0) {
1182 err("qcount < 2 and no ring room!");
1183 }
1184 db->nextOut += db->fragsize;
1185 if (db->nextOut >= db->rawbuf + db->dmasize)
1186 db->nextOut -= db->dmasize;
1187 db->total_bytes += db->dma_fragsize;
1188 if (db->dma_qcount == 0)
1189 start_dac(s);
1190 db->dma_qcount++;
1191 }
1192 spin_unlock_irqrestore(&s->lock, flags);
1193
1194 count -= cnt;
1195 usercnt = cnt / db->cnt_factor;
1196 buffer += usercnt;
1197 ret += usercnt;
1198 } /* while (count > 0) */
1199
1200 out:
1201 mutex_unlock(&s->sem);
1202 out2:
1203 remove_wait_queue(&db->wait, &wait);
1204 set_current_state(TASK_RUNNING);
1205 return ret;
1206 }
1207
1208
1209 /* No kernel lock - we have our own spinlock */
1210 static unsigned int
1211 au1550_poll(struct file *file, struct poll_table_struct *wait)
1212 {
1213 struct au1550_state *s = (struct au1550_state *)file->private_data;
1214 unsigned long flags;
1215 unsigned int mask = 0;
1216
1217 if (file->f_mode & FMODE_WRITE) {
1218 if (!s->dma_dac.ready)
1219 return 0;
1220 poll_wait(file, &s->dma_dac.wait, wait);
1221 }
1222 if (file->f_mode & FMODE_READ) {
1223 if (!s->dma_adc.ready)
1224 return 0;
1225 poll_wait(file, &s->dma_adc.wait, wait);
1226 }
1227
1228 spin_lock_irqsave(&s->lock, flags);
1229
1230 if (file->f_mode & FMODE_READ) {
1231 if (s->dma_adc.count >= (signed)s->dma_adc.dma_fragsize)
1232 mask |= POLLIN | POLLRDNORM;
1233 }
1234 if (file->f_mode & FMODE_WRITE) {
1235 if (s->dma_dac.mapped) {
1236 if (s->dma_dac.count >=
1237 (signed)s->dma_dac.dma_fragsize)
1238 mask |= POLLOUT | POLLWRNORM;
1239 } else {
1240 if ((signed) s->dma_dac.dmasize >=
1241 s->dma_dac.count + (signed)s->dma_dac.dma_fragsize)
1242 mask |= POLLOUT | POLLWRNORM;
1243 }
1244 }
1245 spin_unlock_irqrestore(&s->lock, flags);
1246 return mask;
1247 }
1248
1249 static int
1250 au1550_mmap(struct file *file, struct vm_area_struct *vma)
1251 {
1252 struct au1550_state *s = (struct au1550_state *)file->private_data;
1253 struct dmabuf *db;
1254 unsigned long size;
1255 int ret = 0;
1256
1257 lock_kernel();
1258 mutex_lock(&s->sem);
1259 if (vma->vm_flags & VM_WRITE)
1260 db = &s->dma_dac;
1261 else if (vma->vm_flags & VM_READ)
1262 db = &s->dma_adc;
1263 else {
1264 ret = -EINVAL;
1265 goto out;
1266 }
1267 if (vma->vm_pgoff != 0) {
1268 ret = -EINVAL;
1269 goto out;
1270 }
1271 size = vma->vm_end - vma->vm_start;
1272 if (size > (PAGE_SIZE << db->buforder)) {
1273 ret = -EINVAL;
1274 goto out;
1275 }
1276 if (remap_pfn_range(vma, vma->vm_start, page_to_pfn(virt_to_page(db->rawbuf)),
1277 size, vma->vm_page_prot)) {
1278 ret = -EAGAIN;
1279 goto out;
1280 }
1281 vma->vm_flags &= ~VM_IO;
1282 db->mapped = 1;
1283 out:
1284 mutex_unlock(&s->sem);
1285 unlock_kernel();
1286 return ret;
1287 }
1288
1289 #ifdef DEBUG
1290 static struct ioctl_str_t {
1291 unsigned int cmd;
1292 const char *str;
1293 } ioctl_str[] = {
1294 {SNDCTL_DSP_RESET, "SNDCTL_DSP_RESET"},
1295 {SNDCTL_DSP_SYNC, "SNDCTL_DSP_SYNC"},
1296 {SNDCTL_DSP_SPEED, "SNDCTL_DSP_SPEED"},
1297 {SNDCTL_DSP_STEREO, "SNDCTL_DSP_STEREO"},
1298 {SNDCTL_DSP_GETBLKSIZE, "SNDCTL_DSP_GETBLKSIZE"},
1299 {SNDCTL_DSP_SAMPLESIZE, "SNDCTL_DSP_SAMPLESIZE"},
1300 {SNDCTL_DSP_CHANNELS, "SNDCTL_DSP_CHANNELS"},
1301 {SOUND_PCM_WRITE_CHANNELS, "SOUND_PCM_WRITE_CHANNELS"},
1302 {SOUND_PCM_WRITE_FILTER, "SOUND_PCM_WRITE_FILTER"},
1303 {SNDCTL_DSP_POST, "SNDCTL_DSP_POST"},
1304 {SNDCTL_DSP_SUBDIVIDE, "SNDCTL_DSP_SUBDIVIDE"},
1305 {SNDCTL_DSP_SETFRAGMENT, "SNDCTL_DSP_SETFRAGMENT"},
1306 {SNDCTL_DSP_GETFMTS, "SNDCTL_DSP_GETFMTS"},
1307 {SNDCTL_DSP_SETFMT, "SNDCTL_DSP_SETFMT"},
1308 {SNDCTL_DSP_GETOSPACE, "SNDCTL_DSP_GETOSPACE"},
1309 {SNDCTL_DSP_GETISPACE, "SNDCTL_DSP_GETISPACE"},
1310 {SNDCTL_DSP_NONBLOCK, "SNDCTL_DSP_NONBLOCK"},
1311 {SNDCTL_DSP_GETCAPS, "SNDCTL_DSP_GETCAPS"},
1312 {SNDCTL_DSP_GETTRIGGER, "SNDCTL_DSP_GETTRIGGER"},
1313 {SNDCTL_DSP_SETTRIGGER, "SNDCTL_DSP_SETTRIGGER"},
1314 {SNDCTL_DSP_GETIPTR, "SNDCTL_DSP_GETIPTR"},
1315 {SNDCTL_DSP_GETOPTR, "SNDCTL_DSP_GETOPTR"},
1316 {SNDCTL_DSP_MAPINBUF, "SNDCTL_DSP_MAPINBUF"},
1317 {SNDCTL_DSP_MAPOUTBUF, "SNDCTL_DSP_MAPOUTBUF"},
1318 {SNDCTL_DSP_SETSYNCRO, "SNDCTL_DSP_SETSYNCRO"},
1319 {SNDCTL_DSP_SETDUPLEX, "SNDCTL_DSP_SETDUPLEX"},
1320 {SNDCTL_DSP_GETODELAY, "SNDCTL_DSP_GETODELAY"},
1321 {SNDCTL_DSP_GETCHANNELMASK, "SNDCTL_DSP_GETCHANNELMASK"},
1322 {SNDCTL_DSP_BIND_CHANNEL, "SNDCTL_DSP_BIND_CHANNEL"},
1323 {OSS_GETVERSION, "OSS_GETVERSION"},
1324 {SOUND_PCM_READ_RATE, "SOUND_PCM_READ_RATE"},
1325 {SOUND_PCM_READ_CHANNELS, "SOUND_PCM_READ_CHANNELS"},
1326 {SOUND_PCM_READ_BITS, "SOUND_PCM_READ_BITS"},
1327 {SOUND_PCM_READ_FILTER, "SOUND_PCM_READ_FILTER"}
1328 };
1329 #endif
1330
1331 static int
1332 dma_count_done(struct dmabuf *db)
1333 {
1334 if (db->stopped)
1335 return 0;
1336
1337 return db->dma_fragsize - au1xxx_get_dma_residue(db->dmanr);
1338 }
1339
1340
1341 static int
1342 au1550_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
1343 unsigned long arg)
1344 {
1345 struct au1550_state *s = (struct au1550_state *)file->private_data;
1346 unsigned long flags;
1347 audio_buf_info abinfo;
1348 count_info cinfo;
1349 int count;
1350 int val, mapped, ret, diff;
1351
1352 mapped = ((file->f_mode & FMODE_WRITE) && s->dma_dac.mapped) ||
1353 ((file->f_mode & FMODE_READ) && s->dma_adc.mapped);
1354
1355 #ifdef DEBUG
1356 for (count = 0; count < ARRAY_SIZE(ioctl_str); count++) {
1357 if (ioctl_str[count].cmd == cmd)
1358 break;
1359 }
1360 if (count < ARRAY_SIZE(ioctl_str))
1361 pr_debug("ioctl %s, arg=0x%lxn", ioctl_str[count].str, arg);
1362 else
1363 pr_debug("ioctl 0x%x unknown, arg=0x%lx\n", cmd, arg);
1364 #endif
1365
1366 switch (cmd) {
1367 case OSS_GETVERSION:
1368 return put_user(SOUND_VERSION, (int *) arg);
1369
1370 case SNDCTL_DSP_SYNC:
1371 if (file->f_mode & FMODE_WRITE)
1372 return drain_dac(s, file->f_flags & O_NONBLOCK);
1373 return 0;
1374
1375 case SNDCTL_DSP_SETDUPLEX:
1376 return 0;
1377
1378 case SNDCTL_DSP_GETCAPS:
1379 return put_user(DSP_CAP_DUPLEX | DSP_CAP_REALTIME |
1380 DSP_CAP_TRIGGER | DSP_CAP_MMAP, (int *)arg);
1381
1382 case SNDCTL_DSP_RESET:
1383 if (file->f_mode & FMODE_WRITE) {
1384 stop_dac(s);
1385 synchronize_irq();
1386 s->dma_dac.count = s->dma_dac.total_bytes = 0;
1387 s->dma_dac.nextIn = s->dma_dac.nextOut =
1388 s->dma_dac.rawbuf;
1389 }
1390 if (file->f_mode & FMODE_READ) {
1391 stop_adc(s);
1392 synchronize_irq();
1393 s->dma_adc.count = s->dma_adc.total_bytes = 0;
1394 s->dma_adc.nextIn = s->dma_adc.nextOut =
1395 s->dma_adc.rawbuf;
1396 }
1397 return 0;
1398
1399 case SNDCTL_DSP_SPEED:
1400 if (get_user(val, (int *) arg))
1401 return -EFAULT;
1402 if (val >= 0) {
1403 if (file->f_mode & FMODE_READ) {
1404 stop_adc(s);
1405 set_adc_rate(s, val);
1406 }
1407 if (file->f_mode & FMODE_WRITE) {
1408 stop_dac(s);
1409 set_dac_rate(s, val);
1410 }
1411 if (s->open_mode & FMODE_READ)
1412 if ((ret = prog_dmabuf_adc(s)))
1413 return ret;
1414 if (s->open_mode & FMODE_WRITE)
1415 if ((ret = prog_dmabuf_dac(s)))
1416 return ret;
1417 }
1418 return put_user((file->f_mode & FMODE_READ) ?
1419 s->dma_adc.sample_rate :
1420 s->dma_dac.sample_rate,
1421 (int *)arg);
1422
1423 case SNDCTL_DSP_STEREO:
1424 if (get_user(val, (int *) arg))
1425 return -EFAULT;
1426 if (file->f_mode & FMODE_READ) {
1427 stop_adc(s);
1428 s->dma_adc.num_channels = val ? 2 : 1;
1429 if ((ret = prog_dmabuf_adc(s)))
1430 return ret;
1431 }
1432 if (file->f_mode & FMODE_WRITE) {
1433 stop_dac(s);
1434 s->dma_dac.num_channels = val ? 2 : 1;
1435 if (s->codec_ext_caps & AC97_EXT_DACS) {
1436 /* disable surround and center/lfe in AC'97
1437 */
1438 u16 ext_stat = rdcodec(s->codec,
1439 AC97_EXTENDED_STATUS);
1440 wrcodec(s->codec, AC97_EXTENDED_STATUS,
1441 ext_stat | (AC97_EXTSTAT_PRI |
1442 AC97_EXTSTAT_PRJ |
1443 AC97_EXTSTAT_PRK));
1444 }
1445 if ((ret = prog_dmabuf_dac(s)))
1446 return ret;
1447 }
1448 return 0;
1449
1450 case SNDCTL_DSP_CHANNELS:
1451 if (get_user(val, (int *) arg))
1452 return -EFAULT;
1453 if (val != 0) {
1454 if (file->f_mode & FMODE_READ) {
1455 if (val < 0 || val > 2)
1456 return -EINVAL;
1457 stop_adc(s);
1458 s->dma_adc.num_channels = val;
1459 if ((ret = prog_dmabuf_adc(s)))
1460 return ret;
1461 }
1462 if (file->f_mode & FMODE_WRITE) {
1463 switch (val) {
1464 case 1:
1465 case 2:
1466 break;
1467 case 3:
1468 case 5:
1469 return -EINVAL;
1470 case 4:
1471 if (!(s->codec_ext_caps &
1472 AC97_EXTID_SDAC))
1473 return -EINVAL;
1474 break;
1475 case 6:
1476 if ((s->codec_ext_caps &
1477 AC97_EXT_DACS) != AC97_EXT_DACS)
1478 return -EINVAL;
1479 break;
1480 default:
1481 return -EINVAL;
1482 }
1483
1484 stop_dac(s);
1485 if (val <= 2 &&
1486 (s->codec_ext_caps & AC97_EXT_DACS)) {
1487 /* disable surround and center/lfe
1488 * channels in AC'97
1489 */
1490 u16 ext_stat =
1491 rdcodec(s->codec,
1492 AC97_EXTENDED_STATUS);
1493 wrcodec(s->codec,
1494 AC97_EXTENDED_STATUS,
1495 ext_stat | (AC97_EXTSTAT_PRI |
1496 AC97_EXTSTAT_PRJ |
1497 AC97_EXTSTAT_PRK));
1498 } else if (val >= 4) {
1499 /* enable surround, center/lfe
1500 * channels in AC'97
1501 */
1502 u16 ext_stat =
1503 rdcodec(s->codec,
1504 AC97_EXTENDED_STATUS);
1505 ext_stat &= ~AC97_EXTSTAT_PRJ;
1506 if (val == 6)
1507 ext_stat &=
1508 ~(AC97_EXTSTAT_PRI |
1509 AC97_EXTSTAT_PRK);
1510 wrcodec(s->codec,
1511 AC97_EXTENDED_STATUS,
1512 ext_stat);
1513 }
1514
1515 s->dma_dac.num_channels = val;
1516 if ((ret = prog_dmabuf_dac(s)))
1517 return ret;
1518 }
1519 }
1520 return put_user(val, (int *) arg);
1521
1522 case SNDCTL_DSP_GETFMTS: /* Returns a mask */
1523 return put_user(AFMT_S16_LE | AFMT_U8, (int *) arg);
1524
1525 case SNDCTL_DSP_SETFMT: /* Selects ONE fmt */
1526 if (get_user(val, (int *) arg))
1527 return -EFAULT;
1528 if (val != AFMT_QUERY) {
1529 if (file->f_mode & FMODE_READ) {
1530 stop_adc(s);
1531 if (val == AFMT_S16_LE)
1532 s->dma_adc.sample_size = 16;
1533 else {
1534 val = AFMT_U8;
1535 s->dma_adc.sample_size = 8;
1536 }
1537 if ((ret = prog_dmabuf_adc(s)))
1538 return ret;
1539 }
1540 if (file->f_mode & FMODE_WRITE) {
1541 stop_dac(s);
1542 if (val == AFMT_S16_LE)
1543 s->dma_dac.sample_size = 16;
1544 else {
1545 val = AFMT_U8;
1546 s->dma_dac.sample_size = 8;
1547 }
1548 if ((ret = prog_dmabuf_dac(s)))
1549 return ret;
1550 }
1551 } else {
1552 if (file->f_mode & FMODE_READ)
1553 val = (s->dma_adc.sample_size == 16) ?
1554 AFMT_S16_LE : AFMT_U8;
1555 else
1556 val = (s->dma_dac.sample_size == 16) ?
1557 AFMT_S16_LE : AFMT_U8;
1558 }
1559 return put_user(val, (int *) arg);
1560
1561 case SNDCTL_DSP_POST:
1562 return 0;
1563
1564 case SNDCTL_DSP_GETTRIGGER:
1565 val = 0;
1566 spin_lock_irqsave(&s->lock, flags);
1567 if (file->f_mode & FMODE_READ && !s->dma_adc.stopped)
1568 val |= PCM_ENABLE_INPUT;
1569 if (file->f_mode & FMODE_WRITE && !s->dma_dac.stopped)
1570 val |= PCM_ENABLE_OUTPUT;
1571 spin_unlock_irqrestore(&s->lock, flags);
1572 return put_user(val, (int *) arg);
1573
1574 case SNDCTL_DSP_SETTRIGGER:
1575 if (get_user(val, (int *) arg))
1576 return -EFAULT;
1577 if (file->f_mode & FMODE_READ) {
1578 if (val & PCM_ENABLE_INPUT) {
1579 spin_lock_irqsave(&s->lock, flags);
1580 start_adc(s);
1581 spin_unlock_irqrestore(&s->lock, flags);
1582 } else
1583 stop_adc(s);
1584 }
1585 if (file->f_mode & FMODE_WRITE) {
1586 if (val & PCM_ENABLE_OUTPUT) {
1587 spin_lock_irqsave(&s->lock, flags);
1588 start_dac(s);
1589 spin_unlock_irqrestore(&s->lock, flags);
1590 } else
1591 stop_dac(s);
1592 }
1593 return 0;
1594
1595 case SNDCTL_DSP_GETOSPACE:
1596 if (!(file->f_mode & FMODE_WRITE))
1597 return -EINVAL;
1598 abinfo.fragsize = s->dma_dac.fragsize;
1599 spin_lock_irqsave(&s->lock, flags);
1600 count = s->dma_dac.count;
1601 count -= dma_count_done(&s->dma_dac);
1602 spin_unlock_irqrestore(&s->lock, flags);
1603 if (count < 0)
1604 count = 0;
1605 abinfo.bytes = (s->dma_dac.dmasize - count) /
1606 s->dma_dac.cnt_factor;
1607 abinfo.fragstotal = s->dma_dac.numfrag;
1608 abinfo.fragments = abinfo.bytes >> s->dma_dac.fragshift;
1609 pr_debug("ioctl SNDCTL_DSP_GETOSPACE: bytes=%d, fragments=%d\n", abinfo.bytes, abinfo.fragments);
1610 return copy_to_user((void *) arg, &abinfo,
1611 sizeof(abinfo)) ? -EFAULT : 0;
1612
1613 case SNDCTL_DSP_GETISPACE:
1614 if (!(file->f_mode & FMODE_READ))
1615 return -EINVAL;
1616 abinfo.fragsize = s->dma_adc.fragsize;
1617 spin_lock_irqsave(&s->lock, flags);
1618 count = s->dma_adc.count;
1619 count += dma_count_done(&s->dma_adc);
1620 spin_unlock_irqrestore(&s->lock, flags);
1621 if (count < 0)
1622 count = 0;
1623 abinfo.bytes = count / s->dma_adc.cnt_factor;
1624 abinfo.fragstotal = s->dma_adc.numfrag;
1625 abinfo.fragments = abinfo.bytes >> s->dma_adc.fragshift;
1626 return copy_to_user((void *) arg, &abinfo,
1627 sizeof(abinfo)) ? -EFAULT : 0;
1628
1629 case SNDCTL_DSP_NONBLOCK:
1630 file->f_flags |= O_NONBLOCK;
1631 return 0;
1632
1633 case SNDCTL_DSP_GETODELAY:
1634 if (!(file->f_mode & FMODE_WRITE))
1635 return -EINVAL;
1636 spin_lock_irqsave(&s->lock, flags);
1637 count = s->dma_dac.count;
1638 count -= dma_count_done(&s->dma_dac);
1639 spin_unlock_irqrestore(&s->lock, flags);
1640 if (count < 0)
1641 count = 0;
1642 count /= s->dma_dac.cnt_factor;
1643 return put_user(count, (int *) arg);
1644
1645 case SNDCTL_DSP_GETIPTR:
1646 if (!(file->f_mode & FMODE_READ))
1647 return -EINVAL;
1648 spin_lock_irqsave(&s->lock, flags);
1649 cinfo.bytes = s->dma_adc.total_bytes;
1650 count = s->dma_adc.count;
1651 if (!s->dma_adc.stopped) {
1652 diff = dma_count_done(&s->dma_adc);
1653 count += diff;
1654 cinfo.bytes += diff;
1655 cinfo.ptr = virt_to_phys(s->dma_adc.nextIn) + diff -
1656 virt_to_phys(s->dma_adc.rawbuf);
1657 } else
1658 cinfo.ptr = virt_to_phys(s->dma_adc.nextIn) -
1659 virt_to_phys(s->dma_adc.rawbuf);
1660 if (s->dma_adc.mapped)
1661 s->dma_adc.count &= (s->dma_adc.dma_fragsize-1);
1662 spin_unlock_irqrestore(&s->lock, flags);
1663 if (count < 0)
1664 count = 0;
1665 cinfo.blocks = count >> s->dma_adc.fragshift;
1666 return copy_to_user((void *) arg, &cinfo, sizeof(cinfo));
1667
1668 case SNDCTL_DSP_GETOPTR:
1669 if (!(file->f_mode & FMODE_READ))
1670 return -EINVAL;
1671 spin_lock_irqsave(&s->lock, flags);
1672 cinfo.bytes = s->dma_dac.total_bytes;
1673 count = s->dma_dac.count;
1674 if (!s->dma_dac.stopped) {
1675 diff = dma_count_done(&s->dma_dac);
1676 count -= diff;
1677 cinfo.bytes += diff;
1678 cinfo.ptr = virt_to_phys(s->dma_dac.nextOut) + diff -
1679 virt_to_phys(s->dma_dac.rawbuf);
1680 } else
1681 cinfo.ptr = virt_to_phys(s->dma_dac.nextOut) -
1682 virt_to_phys(s->dma_dac.rawbuf);
1683 if (s->dma_dac.mapped)
1684 s->dma_dac.count &= (s->dma_dac.dma_fragsize-1);
1685 spin_unlock_irqrestore(&s->lock, flags);
1686 if (count < 0)
1687 count = 0;
1688 cinfo.blocks = count >> s->dma_dac.fragshift;
1689 return copy_to_user((void *) arg, &cinfo, sizeof(cinfo));
1690
1691 case SNDCTL_DSP_GETBLKSIZE:
1692 if (file->f_mode & FMODE_WRITE)
1693 return put_user(s->dma_dac.fragsize, (int *) arg);
1694 else
1695 return put_user(s->dma_adc.fragsize, (int *) arg);
1696
1697 case SNDCTL_DSP_SETFRAGMENT:
1698 if (get_user(val, (int *) arg))
1699 return -EFAULT;
1700 if (file->f_mode & FMODE_READ) {
1701 stop_adc(s);
1702 s->dma_adc.ossfragshift = val & 0xffff;
1703 s->dma_adc.ossmaxfrags = (val >> 16) & 0xffff;
1704 if (s->dma_adc.ossfragshift < 4)
1705 s->dma_adc.ossfragshift = 4;
1706 if (s->dma_adc.ossfragshift > 15)
1707 s->dma_adc.ossfragshift = 15;
1708 if (s->dma_adc.ossmaxfrags < 4)
1709 s->dma_adc.ossmaxfrags = 4;
1710 if ((ret = prog_dmabuf_adc(s)))
1711 return ret;
1712 }
1713 if (file->f_mode & FMODE_WRITE) {
1714 stop_dac(s);
1715 s->dma_dac.ossfragshift = val & 0xffff;
1716 s->dma_dac.ossmaxfrags = (val >> 16) & 0xffff;
1717 if (s->dma_dac.ossfragshift < 4)
1718 s->dma_dac.ossfragshift = 4;
1719 if (s->dma_dac.ossfragshift > 15)
1720 s->dma_dac.ossfragshift = 15;
1721 if (s->dma_dac.ossmaxfrags < 4)
1722 s->dma_dac.ossmaxfrags = 4;
1723 if ((ret = prog_dmabuf_dac(s)))
1724 return ret;
1725 }
1726 return 0;
1727
1728 case SNDCTL_DSP_SUBDIVIDE:
1729 if ((file->f_mode & FMODE_READ && s->dma_adc.subdivision) ||
1730 (file->f_mode & FMODE_WRITE && s->dma_dac.subdivision))
1731 return -EINVAL;
1732 if (get_user(val, (int *) arg))
1733 return -EFAULT;
1734 if (val != 1 && val != 2 && val != 4)
1735 return -EINVAL;
1736 if (file->f_mode & FMODE_READ) {
1737 stop_adc(s);
1738 s->dma_adc.subdivision = val;
1739 if ((ret = prog_dmabuf_adc(s)))
1740 return ret;
1741 }
1742 if (file->f_mode & FMODE_WRITE) {
1743 stop_dac(s);
1744 s->dma_dac.subdivision = val;
1745 if ((ret = prog_dmabuf_dac(s)))
1746 return ret;
1747 }
1748 return 0;
1749
1750 case SOUND_PCM_READ_RATE:
1751 return put_user((file->f_mode & FMODE_READ) ?
1752 s->dma_adc.sample_rate :
1753 s->dma_dac.sample_rate,
1754 (int *)arg);
1755
1756 case SOUND_PCM_READ_CHANNELS:
1757 if (file->f_mode & FMODE_READ)
1758 return put_user(s->dma_adc.num_channels, (int *)arg);
1759 else
1760 return put_user(s->dma_dac.num_channels, (int *)arg);
1761
1762 case SOUND_PCM_READ_BITS:
1763 if (file->f_mode & FMODE_READ)
1764 return put_user(s->dma_adc.sample_size, (int *)arg);
1765 else
1766 return put_user(s->dma_dac.sample_size, (int *)arg);
1767
1768 case SOUND_PCM_WRITE_FILTER:
1769 case SNDCTL_DSP_SETSYNCRO:
1770 case SOUND_PCM_READ_FILTER:
1771 return -EINVAL;
1772 }
1773
1774 return mixdev_ioctl(s->codec, cmd, arg);
1775 }
1776
1777
1778 static int
1779 au1550_open(struct inode *inode, struct file *file)
1780 {
1781 int minor = MINOR(inode->i_rdev);
1782 DECLARE_WAITQUEUE(wait, current);
1783 struct au1550_state *s = &au1550_state;
1784 int ret;
1785
1786 #ifdef DEBUG
1787 if (file->f_flags & O_NONBLOCK)
1788 pr_debug("open: non-blocking\n");
1789 else
1790 pr_debug("open: blocking\n");
1791 #endif
1792
1793 file->private_data = s;
1794 /* wait for device to become free */
1795 mutex_lock(&s->open_mutex);
1796 while (s->open_mode & file->f_mode) {
1797 if (file->f_flags & O_NONBLOCK) {
1798 mutex_unlock(&s->open_mutex);
1799 return -EBUSY;
1800 }
1801 add_wait_queue(&s->open_wait, &wait);
1802 __set_current_state(TASK_INTERRUPTIBLE);
1803 mutex_unlock(&s->open_mutex);
1804 schedule();
1805 remove_wait_queue(&s->open_wait, &wait);
1806 set_current_state(TASK_RUNNING);
1807 if (signal_pending(current))
1808 return -ERESTARTSYS;
1809 mutex_lock(&s->open_mutex);
1810 }
1811
1812 stop_dac(s);
1813 stop_adc(s);
1814
1815 if (file->f_mode & FMODE_READ) {
1816 s->dma_adc.ossfragshift = s->dma_adc.ossmaxfrags =
1817 s->dma_adc.subdivision = s->dma_adc.total_bytes = 0;
1818 s->dma_adc.num_channels = 1;
1819 s->dma_adc.sample_size = 8;
1820 set_adc_rate(s, 8000);
1821 if ((minor & 0xf) == SND_DEV_DSP16)
1822 s->dma_adc.sample_size = 16;
1823 }
1824
1825 if (file->f_mode & FMODE_WRITE) {
1826 s->dma_dac.ossfragshift = s->dma_dac.ossmaxfrags =
1827 s->dma_dac.subdivision = s->dma_dac.total_bytes = 0;
1828 s->dma_dac.num_channels = 1;
1829 s->dma_dac.sample_size = 8;
1830 set_dac_rate(s, 8000);
1831 if ((minor & 0xf) == SND_DEV_DSP16)
1832 s->dma_dac.sample_size = 16;
1833 }
1834
1835 if (file->f_mode & FMODE_READ) {
1836 if ((ret = prog_dmabuf_adc(s)))
1837 return ret;
1838 }
1839 if (file->f_mode & FMODE_WRITE) {
1840 if ((ret = prog_dmabuf_dac(s)))
1841 return ret;
1842 }
1843
1844 s->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
1845 mutex_unlock(&s->open_mutex);
1846 mutex_init(&s->sem);
1847 return 0;
1848 }
1849
1850 static int
1851 au1550_release(struct inode *inode, struct file *file)
1852 {
1853 struct au1550_state *s = (struct au1550_state *)file->private_data;
1854
1855 lock_kernel();
1856
1857 if (file->f_mode & FMODE_WRITE) {
1858 unlock_kernel();
1859 drain_dac(s, file->f_flags & O_NONBLOCK);
1860 lock_kernel();
1861 }
1862
1863 mutex_lock(&s->open_mutex);
1864 if (file->f_mode & FMODE_WRITE) {
1865 stop_dac(s);
1866 kfree(s->dma_dac.rawbuf);
1867 s->dma_dac.rawbuf = NULL;
1868 }
1869 if (file->f_mode & FMODE_READ) {
1870 stop_adc(s);
1871 kfree(s->dma_adc.rawbuf);
1872 s->dma_adc.rawbuf = NULL;
1873 }
1874 s->open_mode &= ((~file->f_mode) & (FMODE_READ|FMODE_WRITE));
1875 mutex_unlock(&s->open_mutex);
1876 wake_up(&s->open_wait);
1877 unlock_kernel();
1878 return 0;
1879 }
1880
1881 static /*const */ struct file_operations au1550_audio_fops = {
1882 owner: THIS_MODULE,
1883 llseek: au1550_llseek,
1884 read: au1550_read,
1885 write: au1550_write,
1886 poll: au1550_poll,
1887 ioctl: au1550_ioctl,
1888 mmap: au1550_mmap,
1889 open: au1550_open,
1890 release: au1550_release,
1891 };
1892
1893 MODULE_AUTHOR("Advanced Micro Devices (AMD), dan@embeddededge.com");
1894 MODULE_DESCRIPTION("Au1550 AC97 Audio Driver");
1895 MODULE_LICENSE("GPL");
1896
1897
1898 static int __devinit
1899 au1550_probe(void)
1900 {
1901 struct au1550_state *s = &au1550_state;
1902 int val;
1903
1904 memset(s, 0, sizeof(struct au1550_state));
1905
1906 init_waitqueue_head(&s->dma_adc.wait);
1907 init_waitqueue_head(&s->dma_dac.wait);
1908 init_waitqueue_head(&s->open_wait);
1909 mutex_init(&s->open_mutex);
1910 spin_lock_init(&s->lock);
1911
1912 s->codec = ac97_alloc_codec();
1913 if(s->codec == NULL) {
1914 err("Out of memory");
1915 return -1;
1916 }
1917 s->codec->private_data = s;
1918 s->codec->id = 0;
1919 s->codec->codec_read = rdcodec;
1920 s->codec->codec_write = wrcodec;
1921 s->codec->codec_wait = waitcodec;
1922
1923 if (!request_mem_region(CPHYSADDR(AC97_PSC_SEL),
1924 0x30, "Au1550 AC97")) {
1925 err("AC'97 ports in use");
1926 }
1927
1928 /* Allocate the DMA Channels
1929 */
1930 if ((s->dma_dac.dmanr = au1xxx_dbdma_chan_alloc(DBDMA_MEM_CHAN,
1931 DBDMA_AC97_TX_CHAN, dac_dma_interrupt, (void *)s)) == 0) {
1932 err("Can't get DAC DMA");
1933 goto err_dma1;
1934 }
1935 au1xxx_dbdma_set_devwidth(s->dma_dac.dmanr, 16);
1936 if (au1xxx_dbdma_ring_alloc(s->dma_dac.dmanr,
1937 NUM_DBDMA_DESCRIPTORS) == 0) {
1938 err("Can't get DAC DMA descriptors");
1939 goto err_dma1;
1940 }
1941
1942 if ((s->dma_adc.dmanr = au1xxx_dbdma_chan_alloc(DBDMA_AC97_RX_CHAN,
1943 DBDMA_MEM_CHAN, adc_dma_interrupt, (void *)s)) == 0) {
1944 err("Can't get ADC DMA");
1945 goto err_dma2;
1946 }
1947 au1xxx_dbdma_set_devwidth(s->dma_adc.dmanr, 16);
1948 if (au1xxx_dbdma_ring_alloc(s->dma_adc.dmanr,
1949 NUM_DBDMA_DESCRIPTORS) == 0) {
1950 err("Can't get ADC DMA descriptors");
1951 goto err_dma2;
1952 }
1953
1954 pr_info("DAC: DMA%d, ADC: DMA%d", DBDMA_AC97_TX_CHAN, DBDMA_AC97_RX_CHAN);
1955
1956 /* register devices */
1957
1958 if ((s->dev_audio = register_sound_dsp(&au1550_audio_fops, -1)) < 0)
1959 goto err_dev1;
1960 if ((s->codec->dev_mixer =
1961 register_sound_mixer(&au1550_mixer_fops, -1)) < 0)
1962 goto err_dev2;
1963
1964 /* The GPIO for the appropriate PSC was configured by the
1965 * board specific start up.
1966 *
1967 * configure PSC for AC'97
1968 */
1969 au_writel(0, AC97_PSC_CTRL); /* Disable PSC */
1970 au_sync();
1971 au_writel((PSC_SEL_CLK_SERCLK | PSC_SEL_PS_AC97MODE), AC97_PSC_SEL);
1972 au_sync();
1973
1974 /* cold reset the AC'97
1975 */
1976 au_writel(PSC_AC97RST_RST, PSC_AC97RST);
1977 au_sync();
1978 au1550_delay(10);
1979 au_writel(0, PSC_AC97RST);
1980 au_sync();
1981
1982 /* need to delay around 500msec(bleech) to give
1983 some CODECs enough time to wakeup */
1984 au1550_delay(500);
1985
1986 /* warm reset the AC'97 to start the bitclk
1987 */
1988 au_writel(PSC_AC97RST_SNC, PSC_AC97RST);
1989 au_sync();
1990 udelay(100);
1991 au_writel(0, PSC_AC97RST);
1992 au_sync();
1993
1994 /* Enable PSC
1995 */
1996 au_writel(PSC_CTRL_ENABLE, AC97_PSC_CTRL);
1997 au_sync();
1998
1999 /* Wait for PSC ready.
2000 */
2001 do {
2002 val = au_readl(PSC_AC97STAT);
2003 au_sync();
2004 } while ((val & PSC_AC97STAT_SR) == 0);
2005
2006 /* Configure AC97 controller.
2007 * Deep FIFO, 16-bit sample, DMA, make sure DMA matches fifo size.
2008 */
2009 val = PSC_AC97CFG_SET_LEN(16);
2010 val |= PSC_AC97CFG_RT_FIFO8 | PSC_AC97CFG_TT_FIFO8;
2011
2012 /* Enable device so we can at least
2013 * talk over the AC-link.
2014 */
2015 au_writel(val, PSC_AC97CFG);
2016 au_writel(PSC_AC97MSK_ALLMASK, PSC_AC97MSK);
2017 au_sync();
2018 val |= PSC_AC97CFG_DE_ENABLE;
2019 au_writel(val, PSC_AC97CFG);
2020 au_sync();
2021
2022 /* Wait for Device ready.
2023 */
2024 do {
2025 val = au_readl(PSC_AC97STAT);
2026 au_sync();
2027 } while ((val & PSC_AC97STAT_DR) == 0);
2028
2029 /* codec init */
2030 if (!ac97_probe_codec(s->codec))
2031 goto err_dev3;
2032
2033 s->codec_base_caps = rdcodec(s->codec, AC97_RESET);
2034 s->codec_ext_caps = rdcodec(s->codec, AC97_EXTENDED_ID);
2035 pr_info("AC'97 Base/Extended ID = %04x/%04x",
2036 s->codec_base_caps, s->codec_ext_caps);
2037
2038 if (!(s->codec_ext_caps & AC97_EXTID_VRA)) {
2039 /* codec does not support VRA
2040 */
2041 s->no_vra = 1;
2042 } else if (!vra) {
2043 /* Boot option says disable VRA
2044 */
2045 u16 ac97_extstat = rdcodec(s->codec, AC97_EXTENDED_STATUS);
2046 wrcodec(s->codec, AC97_EXTENDED_STATUS,
2047 ac97_extstat & ~AC97_EXTSTAT_VRA);
2048 s->no_vra = 1;
2049 }
2050 if (s->no_vra)
2051 pr_info("no VRA, interpolating and decimating");
2052
2053 /* set mic to be the recording source */
2054 val = SOUND_MASK_MIC;
2055 mixdev_ioctl(s->codec, SOUND_MIXER_WRITE_RECSRC,
2056 (unsigned long) &val);
2057
2058 return 0;
2059
2060 err_dev3:
2061 unregister_sound_mixer(s->codec->dev_mixer);
2062 err_dev2:
2063 unregister_sound_dsp(s->dev_audio);
2064 err_dev1:
2065 au1xxx_dbdma_chan_free(s->dma_adc.dmanr);
2066 err_dma2:
2067 au1xxx_dbdma_chan_free(s->dma_dac.dmanr);
2068 err_dma1:
2069 release_mem_region(CPHYSADDR(AC97_PSC_SEL), 0x30);
2070
2071 ac97_release_codec(s->codec);
2072 return -1;
2073 }
2074
2075 static void __devinit
2076 au1550_remove(void)
2077 {
2078 struct au1550_state *s = &au1550_state;
2079
2080 if (!s)
2081 return;
2082 synchronize_irq();
2083 au1xxx_dbdma_chan_free(s->dma_adc.dmanr);
2084 au1xxx_dbdma_chan_free(s->dma_dac.dmanr);
2085 release_mem_region(CPHYSADDR(AC97_PSC_SEL), 0x30);
2086 unregister_sound_dsp(s->dev_audio);
2087 unregister_sound_mixer(s->codec->dev_mixer);
2088 ac97_release_codec(s->codec);
2089 }
2090
2091 static int __init
2092 init_au1550(void)
2093 {
2094 return au1550_probe();
2095 }
2096
2097 static void __exit
2098 cleanup_au1550(void)
2099 {
2100 au1550_remove();
2101 }
2102
2103 module_init(init_au1550);
2104 module_exit(cleanup_au1550);
2105
2106 #ifndef MODULE
2107
2108 static int __init
2109 au1550_setup(char *options)
2110 {
2111 char *this_opt;
2112
2113 if (!options || !*options)
2114 return 0;
2115
2116 while ((this_opt = strsep(&options, ","))) {
2117 if (!*this_opt)
2118 continue;
2119 if (!strncmp(this_opt, "vra", 3)) {
2120 vra = 1;
2121 }
2122 }
2123
2124 return 1;
2125 }
2126
2127 __setup("au1550_audio=", au1550_setup);
2128
2129 #endif /* MODULE */
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