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security: prevent permission checking of file removal via sysfs_remove_group()
[linux-2.6/linux-2.6-openrd.git] / sound / oss / au1550_ac97.c
bloba339f0c0d5129323068a89831adb19fcbefa38cc
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 <linux/mutex.h>
56
57 #include <asm/io.h>
58 #include <asm/uaccess.h>
59 #include <asm/hardirq.h>
60 #include <asm/mach-au1x00/au1xxx_psc.h>
61 #include <asm/mach-au1x00/au1xxx_dbdma.h>
62 #include <asm/mach-au1x00/au1xxx.h>
63
64 #undef OSS_DOCUMENTED_MIXER_SEMANTICS
65
66 /* misc stuff */
67 #define POLL_COUNT 0x50000
68 #define AC97_EXT_DACS (AC97_EXTID_SDAC | AC97_EXTID_CDAC | AC97_EXTID_LDAC)
69
70 /* The number of DBDMA ring descriptors to allocate. No sense making
71 * this too large....if you can't keep up with a few you aren't likely
72 * to be able to with lots of them, either.
73 */
74 #define NUM_DBDMA_DESCRIPTORS 4
75
76 #define err(format, arg...) printk(KERN_ERR format "\n" , ## arg)
77
78 /* Boot options
79 * 0 = no VRA, 1 = use VRA if codec supports it
80 */
81 static int vra = 1;
82 module_param(vra, bool, 0);
83 MODULE_PARM_DESC(vra, "if 1 use VRA if codec supports it");
84
85 static struct au1550_state {
86 /* soundcore stuff */
87 int dev_audio;
88
89 struct ac97_codec *codec;
90 unsigned codec_base_caps; /* AC'97 reg 00h, "Reset Register" */
91 unsigned codec_ext_caps; /* AC'97 reg 28h, "Extended Audio ID" */
92 int no_vra; /* do not use VRA */
93
94 spinlock_t lock;
95 struct mutex open_mutex;
96 struct mutex sem;
97 mode_t open_mode;
98 wait_queue_head_t open_wait;
99
100 struct dmabuf {
101 u32 dmanr;
102 unsigned sample_rate;
103 unsigned src_factor;
104 unsigned sample_size;
105 int num_channels;
106 int dma_bytes_per_sample;
107 int user_bytes_per_sample;
108 int cnt_factor;
109
110 void *rawbuf;
111 unsigned buforder;
112 unsigned numfrag;
113 unsigned fragshift;
114 void *nextIn;
115 void *nextOut;
116 int count;
117 unsigned total_bytes;
118 unsigned error;
119 wait_queue_head_t wait;
120
121 /* redundant, but makes calculations easier */
122 unsigned fragsize;
123 unsigned dma_fragsize;
124 unsigned dmasize;
125 unsigned dma_qcount;
126
127 /* OSS stuff */
128 unsigned mapped:1;
129 unsigned ready:1;
130 unsigned stopped:1;
131 unsigned ossfragshift;
132 int ossmaxfrags;
133 unsigned subdivision;
134 } dma_dac, dma_adc;
135 } au1550_state;
136
137 static unsigned
138 ld2(unsigned int x)
139 {
140 unsigned r = 0;
141
142 if (x >= 0x10000) {
143 x >>= 16;
144 r += 16;
145 }
146 if (x >= 0x100) {
147 x >>= 8;
148 r += 8;
149 }
150 if (x >= 0x10) {
151 x >>= 4;
152 r += 4;
153 }
154 if (x >= 4) {
155 x >>= 2;
156 r += 2;
157 }
158 if (x >= 2)
159 r++;
160 return r;
161 }
162
163 static void
164 au1550_delay(int msec)
165 {
166 unsigned long tmo;
167 signed long tmo2;
168
169 if (in_interrupt())
170 return;
171
172 tmo = jiffies + (msec * HZ) / 1000;
173 for (;;) {
174 tmo2 = tmo - jiffies;
175 if (tmo2 <= 0)
176 break;
177 schedule_timeout(tmo2);
178 }
179 }
180
181 static u16
182 rdcodec(struct ac97_codec *codec, u8 addr)
183 {
184 struct au1550_state *s = (struct au1550_state *)codec->private_data;
185 unsigned long flags;
186 u32 cmd, val;
187 u16 data;
188 int i;
189
190 spin_lock_irqsave(&s->lock, flags);
191
192 for (i = 0; i < POLL_COUNT; i++) {
193 val = au_readl(PSC_AC97STAT);
194 au_sync();
195 if (!(val & PSC_AC97STAT_CP))
196 break;
197 }
198 if (i == POLL_COUNT)
199 err("rdcodec: codec cmd pending expired!");
200
201 cmd = (u32)PSC_AC97CDC_INDX(addr);
202 cmd |= PSC_AC97CDC_RD; /* read command */
203 au_writel(cmd, PSC_AC97CDC);
204 au_sync();
205
206 /* now wait for the data
207 */
208 for (i = 0; i < POLL_COUNT; i++) {
209 val = au_readl(PSC_AC97STAT);
210 au_sync();
211 if (!(val & PSC_AC97STAT_CP))
212 break;
213 }
214 if (i == POLL_COUNT) {
215 err("rdcodec: read poll expired!");
216 data = 0;
217 goto out;
218 }
219
220 /* wait for command done?
221 */
222 for (i = 0; i < POLL_COUNT; i++) {
223 val = au_readl(PSC_AC97EVNT);
224 au_sync();
225 if (val & PSC_AC97EVNT_CD)
226 break;
227 }
228 if (i == POLL_COUNT) {
229 err("rdcodec: read cmdwait expired!");
230 data = 0;
231 goto out;
232 }
233
234 data = au_readl(PSC_AC97CDC) & 0xffff;
235 au_sync();
236
237 /* Clear command done event.
238 */
239 au_writel(PSC_AC97EVNT_CD, PSC_AC97EVNT);
240 au_sync();
241
242 out:
243 spin_unlock_irqrestore(&s->lock, flags);
244
245 return data;
246 }
247
248
249 static void
250 wrcodec(struct ac97_codec *codec, u8 addr, u16 data)
251 {
252 struct au1550_state *s = (struct au1550_state *)codec->private_data;
253 unsigned long flags;
254 u32 cmd, val;
255 int i;
256
257 spin_lock_irqsave(&s->lock, flags);
258
259 for (i = 0; i < POLL_COUNT; i++) {
260 val = au_readl(PSC_AC97STAT);
261 au_sync();
262 if (!(val & PSC_AC97STAT_CP))
263 break;
264 }
265 if (i == POLL_COUNT)
266 err("wrcodec: codec cmd pending expired!");
267
268 cmd = (u32)PSC_AC97CDC_INDX(addr);
269 cmd |= (u32)data;
270 au_writel(cmd, PSC_AC97CDC);
271 au_sync();
272
273 for (i = 0; i < POLL_COUNT; i++) {
274 val = au_readl(PSC_AC97STAT);
275 au_sync();
276 if (!(val & PSC_AC97STAT_CP))
277 break;
278 }
279 if (i == POLL_COUNT)
280 err("wrcodec: codec cmd pending expired!");
281
282 for (i = 0; i < POLL_COUNT; i++) {
283 val = au_readl(PSC_AC97EVNT);
284 au_sync();
285 if (val & PSC_AC97EVNT_CD)
286 break;
287 }
288 if (i == POLL_COUNT)
289 err("wrcodec: read cmdwait expired!");
290
291 /* Clear command done event.
292 */
293 au_writel(PSC_AC97EVNT_CD, PSC_AC97EVNT);
294 au_sync();
295
296 spin_unlock_irqrestore(&s->lock, flags);
297 }
298
299 static void
300 waitcodec(struct ac97_codec *codec)
301 {
302 u16 temp;
303 u32 val;
304 int i;
305
306 /* codec_wait is used to wait for a ready state after
307 * an AC97C_RESET.
308 */
309 au1550_delay(10);
310
311 /* first poll the CODEC_READY tag bit
312 */
313 for (i = 0; i < POLL_COUNT; i++) {
314 val = au_readl(PSC_AC97STAT);
315 au_sync();
316 if (val & PSC_AC97STAT_CR)
317 break;
318 }
319 if (i == POLL_COUNT) {
320 err("waitcodec: CODEC_READY poll expired!");
321 return;
322 }
323
324 /* get AC'97 powerdown control/status register
325 */
326 temp = rdcodec(codec, AC97_POWER_CONTROL);
327
328 /* If anything is powered down, power'em up
329 */
330 if (temp & 0x7f00) {
331 /* Power on
332 */
333 wrcodec(codec, AC97_POWER_CONTROL, 0);
334 au1550_delay(100);
335
336 /* Reread
337 */
338 temp = rdcodec(codec, AC97_POWER_CONTROL);
339 }
340
341 /* Check if Codec REF,ANL,DAC,ADC ready
342 */
343 if ((temp & 0x7f0f) != 0x000f)
344 err("codec reg 26 status (0x%x) not ready!!", temp);
345 }
346
347 /* stop the ADC before calling */
348 static void
349 set_adc_rate(struct au1550_state *s, unsigned rate)
350 {
351 struct dmabuf *adc = &s->dma_adc;
352 struct dmabuf *dac = &s->dma_dac;
353 unsigned adc_rate, dac_rate;
354 u16 ac97_extstat;
355
356 if (s->no_vra) {
357 /* calc SRC factor
358 */
359 adc->src_factor = ((96000 / rate) + 1) >> 1;
360 adc->sample_rate = 48000 / adc->src_factor;
361 return;
362 }
363
364 adc->src_factor = 1;
365
366 ac97_extstat = rdcodec(s->codec, AC97_EXTENDED_STATUS);
367
368 rate = rate > 48000 ? 48000 : rate;
369
370 /* enable VRA
371 */
372 wrcodec(s->codec, AC97_EXTENDED_STATUS,
373 ac97_extstat | AC97_EXTSTAT_VRA);
374
375 /* now write the sample rate
376 */
377 wrcodec(s->codec, AC97_PCM_LR_ADC_RATE, (u16) rate);
378
379 /* read it back for actual supported rate
380 */
381 adc_rate = rdcodec(s->codec, AC97_PCM_LR_ADC_RATE);
382
383 pr_debug("set_adc_rate: set to %d Hz\n", adc_rate);
384
385 /* some codec's don't allow unequal DAC and ADC rates, in which case
386 * writing one rate reg actually changes both.
387 */
388 dac_rate = rdcodec(s->codec, AC97_PCM_FRONT_DAC_RATE);
389 if (dac->num_channels > 2)
390 wrcodec(s->codec, AC97_PCM_SURR_DAC_RATE, dac_rate);
391 if (dac->num_channels > 4)
392 wrcodec(s->codec, AC97_PCM_LFE_DAC_RATE, dac_rate);
393
394 adc->sample_rate = adc_rate;
395 dac->sample_rate = dac_rate;
396 }
397
398 /* stop the DAC before calling */
399 static void
400 set_dac_rate(struct au1550_state *s, unsigned rate)
401 {
402 struct dmabuf *dac = &s->dma_dac;
403 struct dmabuf *adc = &s->dma_adc;
404 unsigned adc_rate, dac_rate;
405 u16 ac97_extstat;
406
407 if (s->no_vra) {
408 /* calc SRC factor
409 */
410 dac->src_factor = ((96000 / rate) + 1) >> 1;
411 dac->sample_rate = 48000 / dac->src_factor;
412 return;
413 }
414
415 dac->src_factor = 1;
416
417 ac97_extstat = rdcodec(s->codec, AC97_EXTENDED_STATUS);
418
419 rate = rate > 48000 ? 48000 : rate;
420
421 /* enable VRA
422 */
423 wrcodec(s->codec, AC97_EXTENDED_STATUS,
424 ac97_extstat | AC97_EXTSTAT_VRA);
425
426 /* now write the sample rate
427 */
428 wrcodec(s->codec, AC97_PCM_FRONT_DAC_RATE, (u16) rate);
429
430 /* I don't support different sample rates for multichannel,
431 * so make these channels the same.
432 */
433 if (dac->num_channels > 2)
434 wrcodec(s->codec, AC97_PCM_SURR_DAC_RATE, (u16) rate);
435 if (dac->num_channels > 4)
436 wrcodec(s->codec, AC97_PCM_LFE_DAC_RATE, (u16) rate);
437 /* read it back for actual supported rate
438 */
439 dac_rate = rdcodec(s->codec, AC97_PCM_FRONT_DAC_RATE);
440
441 pr_debug("set_dac_rate: set to %d Hz\n", dac_rate);
442
443 /* some codec's don't allow unequal DAC and ADC rates, in which case
444 * writing one rate reg actually changes both.
445 */
446 adc_rate = rdcodec(s->codec, AC97_PCM_LR_ADC_RATE);
447
448 dac->sample_rate = dac_rate;
449 adc->sample_rate = adc_rate;
450 }
451
452 static void
453 stop_dac(struct au1550_state *s)
454 {
455 struct dmabuf *db = &s->dma_dac;
456 u32 stat;
457 unsigned long flags;
458
459 if (db->stopped)
460 return;
461
462 spin_lock_irqsave(&s->lock, flags);
463
464 au_writel(PSC_AC97PCR_TP, PSC_AC97PCR);
465 au_sync();
466
467 /* Wait for Transmit Busy to show disabled.
468 */
469 do {
470 stat = au_readl(PSC_AC97STAT);
471 au_sync();
472 } while ((stat & PSC_AC97STAT_TB) != 0);
473
474 au1xxx_dbdma_reset(db->dmanr);
475
476 db->stopped = 1;
477
478 spin_unlock_irqrestore(&s->lock, flags);
479 }
480
481 static void
482 stop_adc(struct au1550_state *s)
483 {
484 struct dmabuf *db = &s->dma_adc;
485 unsigned long flags;
486 u32 stat;
487
488 if (db->stopped)
489 return;
490
491 spin_lock_irqsave(&s->lock, flags);
492
493 au_writel(PSC_AC97PCR_RP, PSC_AC97PCR);
494 au_sync();
495
496 /* Wait for Receive Busy to show disabled.
497 */
498 do {
499 stat = au_readl(PSC_AC97STAT);
500 au_sync();
501 } while ((stat & PSC_AC97STAT_RB) != 0);
502
503 au1xxx_dbdma_reset(db->dmanr);
504
505 db->stopped = 1;
506
507 spin_unlock_irqrestore(&s->lock, flags);
508 }
509
510
511 static void
512 set_xmit_slots(int num_channels)
513 {
514 u32 ac97_config, stat;
515
516 ac97_config = au_readl(PSC_AC97CFG);
517 au_sync();
518 ac97_config &= ~(PSC_AC97CFG_TXSLOT_MASK | PSC_AC97CFG_DE_ENABLE);
519 au_writel(ac97_config, PSC_AC97CFG);
520 au_sync();
521
522 switch (num_channels) {
523 case 6: /* stereo with surround and center/LFE,
524 * slots 3,4,6,7,8,9
525 */
526 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(6);
527 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(9);
528
529 case 4: /* stereo with surround, slots 3,4,7,8 */
530 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(7);
531 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(8);
532
533 case 2: /* stereo, slots 3,4 */
534 case 1: /* mono */
535 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(3);
536 ac97_config |= PSC_AC97CFG_TXSLOT_ENA(4);
537 }
538
539 au_writel(ac97_config, PSC_AC97CFG);
540 au_sync();
541
542 ac97_config |= PSC_AC97CFG_DE_ENABLE;
543 au_writel(ac97_config, PSC_AC97CFG);
544 au_sync();
545
546 /* Wait for Device ready.
547 */
548 do {
549 stat = au_readl(PSC_AC97STAT);
550 au_sync();
551 } while ((stat & PSC_AC97STAT_DR) == 0);
552 }
553
554 static void
555 set_recv_slots(int num_channels)
556 {
557 u32 ac97_config, stat;
558
559 ac97_config = au_readl(PSC_AC97CFG);
560 au_sync();
561 ac97_config &= ~(PSC_AC97CFG_RXSLOT_MASK | PSC_AC97CFG_DE_ENABLE);
562 au_writel(ac97_config, PSC_AC97CFG);
563 au_sync();
564
565 /* Always enable slots 3 and 4 (stereo). Slot 6 is
566 * optional Mic ADC, which we don't support yet.
567 */
568 ac97_config |= PSC_AC97CFG_RXSLOT_ENA(3);
569 ac97_config |= PSC_AC97CFG_RXSLOT_ENA(4);
570
571 au_writel(ac97_config, PSC_AC97CFG);
572 au_sync();
573
574 ac97_config |= PSC_AC97CFG_DE_ENABLE;
575 au_writel(ac97_config, PSC_AC97CFG);
576 au_sync();
577
578 /* Wait for Device ready.
579 */
580 do {
581 stat = au_readl(PSC_AC97STAT);
582 au_sync();
583 } while ((stat & PSC_AC97STAT_DR) == 0);
584 }
585
586 /* Hold spinlock for both start_dac() and start_adc() calls */
587 static void
588 start_dac(struct au1550_state *s)
589 {
590 struct dmabuf *db = &s->dma_dac;
591
592 if (!db->stopped)
593 return;
594
595 set_xmit_slots(db->num_channels);
596 au_writel(PSC_AC97PCR_TC, PSC_AC97PCR);
597 au_sync();
598 au_writel(PSC_AC97PCR_TS, PSC_AC97PCR);
599 au_sync();
600
601 au1xxx_dbdma_start(db->dmanr);
602
603 db->stopped = 0;
604 }
605
606 static void
607 start_adc(struct au1550_state *s)
608 {
609 struct dmabuf *db = &s->dma_adc;
610 int i;
611
612 if (!db->stopped)
613 return;
614
615 /* Put two buffers on the ring to get things started.
616 */
617 for (i=0; i<2; i++) {
618 au1xxx_dbdma_put_dest(db->dmanr, db->nextIn, db->dma_fragsize);
619
620 db->nextIn += db->dma_fragsize;
621 if (db->nextIn >= db->rawbuf + db->dmasize)
622 db->nextIn -= db->dmasize;
623 }
624
625 set_recv_slots(db->num_channels);
626 au1xxx_dbdma_start(db->dmanr);
627 au_writel(PSC_AC97PCR_RC, PSC_AC97PCR);
628 au_sync();
629 au_writel(PSC_AC97PCR_RS, PSC_AC97PCR);
630 au_sync();
631
632 db->stopped = 0;
633 }
634
635 static int
636 prog_dmabuf(struct au1550_state *s, struct dmabuf *db)
637 {
638 unsigned user_bytes_per_sec;
639 unsigned bufs;
640 unsigned rate = db->sample_rate;
641
642 if (!db->rawbuf) {
643 db->ready = db->mapped = 0;
644 db->buforder = 5; /* 32 * PAGE_SIZE */
645 db->rawbuf = kmalloc((PAGE_SIZE << db->buforder), GFP_KERNEL);
646 if (!db->rawbuf)
647 return -ENOMEM;
648 }
649
650 db->cnt_factor = 1;
651 if (db->sample_size == 8)
652 db->cnt_factor *= 2;
653 if (db->num_channels == 1)
654 db->cnt_factor *= 2;
655 db->cnt_factor *= db->src_factor;
656
657 db->count = 0;
658 db->dma_qcount = 0;
659 db->nextIn = db->nextOut = db->rawbuf;
660
661 db->user_bytes_per_sample = (db->sample_size>>3) * db->num_channels;
662 db->dma_bytes_per_sample = 2 * ((db->num_channels == 1) ?
663 2 : db->num_channels);
664
665 user_bytes_per_sec = rate * db->user_bytes_per_sample;
666 bufs = PAGE_SIZE << db->buforder;
667 if (db->ossfragshift) {
668 if ((1000 << db->ossfragshift) < user_bytes_per_sec)
669 db->fragshift = ld2(user_bytes_per_sec/1000);
670 else
671 db->fragshift = db->ossfragshift;
672 } else {
673 db->fragshift = ld2(user_bytes_per_sec / 100 /
674 (db->subdivision ? db->subdivision : 1));
675 if (db->fragshift < 3)
676 db->fragshift = 3;
677 }
678
679 db->fragsize = 1 << db->fragshift;
680 db->dma_fragsize = db->fragsize * db->cnt_factor;
681 db->numfrag = bufs / db->dma_fragsize;
682
683 while (db->numfrag < 4 && db->fragshift > 3) {
684 db->fragshift--;
685 db->fragsize = 1 << db->fragshift;
686 db->dma_fragsize = db->fragsize * db->cnt_factor;
687 db->numfrag = bufs / db->dma_fragsize;
688 }
689
690 if (db->ossmaxfrags >= 4 && db->ossmaxfrags < db->numfrag)
691 db->numfrag = db->ossmaxfrags;
692
693 db->dmasize = db->dma_fragsize * db->numfrag;
694 memset(db->rawbuf, 0, bufs);
695
696 pr_debug("prog_dmabuf: rate=%d, samplesize=%d, channels=%d\n",
697 rate, db->sample_size, db->num_channels);
698 pr_debug("prog_dmabuf: fragsize=%d, cnt_factor=%d, dma_fragsize=%d\n",
699 db->fragsize, db->cnt_factor, db->dma_fragsize);
700 pr_debug("prog_dmabuf: numfrag=%d, dmasize=%d\n", db->numfrag, db->dmasize);
701
702 db->ready = 1;
703 return 0;
704 }
705
706 static int
707 prog_dmabuf_adc(struct au1550_state *s)
708 {
709 stop_adc(s);
710 return prog_dmabuf(s, &s->dma_adc);
711
712 }
713
714 static int
715 prog_dmabuf_dac(struct au1550_state *s)
716 {
717 stop_dac(s);
718 return prog_dmabuf(s, &s->dma_dac);
719 }
720
721
722 static void dac_dma_interrupt(int irq, void *dev_id)
723 {
724 struct au1550_state *s = (struct au1550_state *) dev_id;
725 struct dmabuf *db = &s->dma_dac;
726 u32 ac97c_stat;
727
728 spin_lock(&s->lock);
729
730 ac97c_stat = au_readl(PSC_AC97STAT);
731 if (ac97c_stat & (AC97C_XU | AC97C_XO | AC97C_TE))
732 pr_debug("AC97C status = 0x%08x\n", ac97c_stat);
733 db->dma_qcount--;
734
735 if (db->count >= db->fragsize) {
736 if (au1xxx_dbdma_put_source(db->dmanr, db->nextOut,
737 db->fragsize) == 0) {
738 err("qcount < 2 and no ring room!");
739 }
740 db->nextOut += db->fragsize;
741 if (db->nextOut >= db->rawbuf + db->dmasize)
742 db->nextOut -= db->dmasize;
743 db->count -= db->fragsize;
744 db->total_bytes += db->dma_fragsize;
745 db->dma_qcount++;
746 }
747
748 /* wake up anybody listening */
749 if (waitqueue_active(&db->wait))
750 wake_up(&db->wait);
751
752 spin_unlock(&s->lock);
753 }
754
755
756 static void adc_dma_interrupt(int irq, void *dev_id)
757 {
758 struct au1550_state *s = (struct au1550_state *)dev_id;
759 struct dmabuf *dp = &s->dma_adc;
760 u32 obytes;
761 char *obuf;
762
763 spin_lock(&s->lock);
764
765 /* Pull the buffer from the dma queue.
766 */
767 au1xxx_dbdma_get_dest(dp->dmanr, (void *)(&obuf), &obytes);
768
769 if ((dp->count + obytes) > dp->dmasize) {
770 /* Overrun. Stop ADC and log the error
771 */
772 spin_unlock(&s->lock);
773 stop_adc(s);
774 dp->error++;
775 err("adc overrun");
776 return;
777 }
778
779 /* Put a new empty buffer on the destination DMA.
780 */
781 au1xxx_dbdma_put_dest(dp->dmanr, dp->nextIn, dp->dma_fragsize);
782
783 dp->nextIn += dp->dma_fragsize;
784 if (dp->nextIn >= dp->rawbuf + dp->dmasize)
785 dp->nextIn -= dp->dmasize;
786
787 dp->count += obytes;
788 dp->total_bytes += obytes;
789
790 /* wake up anybody listening
791 */
792 if (waitqueue_active(&dp->wait))
793 wake_up(&dp->wait);
794
795 spin_unlock(&s->lock);
796 }
797
798 static loff_t
799 au1550_llseek(struct file *file, loff_t offset, int origin)
800 {
801 return -ESPIPE;
802 }
803
804
805 static int
806 au1550_open_mixdev(struct inode *inode, struct file *file)
807 {
808 file->private_data = &au1550_state;
809 return 0;
810 }
811
812 static int
813 au1550_release_mixdev(struct inode *inode, struct file *file)
814 {
815 return 0;
816 }
817
818 static int
819 mixdev_ioctl(struct ac97_codec *codec, unsigned int cmd,
820 unsigned long arg)
821 {
822 return codec->mixer_ioctl(codec, cmd, arg);
823 }
824
825 static int
826 au1550_ioctl_mixdev(struct inode *inode, struct file *file,
827 unsigned int cmd, unsigned long arg)
828 {
829 struct au1550_state *s = (struct au1550_state *)file->private_data;
830 struct ac97_codec *codec = s->codec;
831
832 return mixdev_ioctl(codec, cmd, arg);
833 }
834
835 static /*const */ struct file_operations au1550_mixer_fops = {
836 owner:THIS_MODULE,
837 llseek:au1550_llseek,
838 ioctl:au1550_ioctl_mixdev,
839 open:au1550_open_mixdev,
840 release:au1550_release_mixdev,
841 };
842
843 static int
844 drain_dac(struct au1550_state *s, int nonblock)
845 {
846 unsigned long flags;
847 int count, tmo;
848
849 if (s->dma_dac.mapped || !s->dma_dac.ready || s->dma_dac.stopped)
850 return 0;
851
852 for (;;) {
853 spin_lock_irqsave(&s->lock, flags);
854 count = s->dma_dac.count;
855 spin_unlock_irqrestore(&s->lock, flags);
856 if (count <= s->dma_dac.fragsize)
857 break;
858 if (signal_pending(current))
859 break;
860 if (nonblock)
861 return -EBUSY;
862 tmo = 1000 * count / (s->no_vra ?
863 48000 : s->dma_dac.sample_rate);
864 tmo /= s->dma_dac.dma_bytes_per_sample;
865 au1550_delay(tmo);
866 }
867 if (signal_pending(current))
868 return -ERESTARTSYS;
869 return 0;
870 }
871
872 static inline u8 S16_TO_U8(s16 ch)
873 {
874 return (u8) (ch >> 8) + 0x80;
875 }
876 static inline s16 U8_TO_S16(u8 ch)
877 {
878 return (s16) (ch - 0x80) << 8;
879 }
880
881 /*
882 * Translates user samples to dma buffer suitable for AC'97 DAC data:
883 * If mono, copy left channel to right channel in dma buffer.
884 * If 8 bit samples, cvt to 16-bit before writing to dma buffer.
885 * If interpolating (no VRA), duplicate every audio frame src_factor times.
886 */
887 static int
888 translate_from_user(struct dmabuf *db, char* dmabuf, char* userbuf,
889 int dmacount)
890 {
891 int sample, i;
892 int interp_bytes_per_sample;
893 int num_samples;
894 int mono = (db->num_channels == 1);
895 char usersample[12];
896 s16 ch, dmasample[6];
897
898 if (db->sample_size == 16 && !mono && db->src_factor == 1) {
899 /* no translation necessary, just copy
900 */
901 if (copy_from_user(dmabuf, userbuf, dmacount))
902 return -EFAULT;
903 return dmacount;
904 }
905
906 interp_bytes_per_sample = db->dma_bytes_per_sample * db->src_factor;
907 num_samples = dmacount / interp_bytes_per_sample;
908
909 for (sample = 0; sample < num_samples; sample++) {
910 if (copy_from_user(usersample, userbuf,
911 db->user_bytes_per_sample)) {
912 return -EFAULT;
913 }
914
915 for (i = 0; i < db->num_channels; i++) {
916 if (db->sample_size == 8)
917 ch = U8_TO_S16(usersample[i]);
918 else
919 ch = *((s16 *) (&usersample[i * 2]));
920 dmasample[i] = ch;
921 if (mono)
922 dmasample[i + 1] = ch; /* right channel */
923 }
924
925 /* duplicate every audio frame src_factor times
926 */
927 for (i = 0; i < db->src_factor; i++)
928 memcpy(dmabuf, dmasample, db->dma_bytes_per_sample);
929
930 userbuf += db->user_bytes_per_sample;
931 dmabuf += interp_bytes_per_sample;
932 }
933
934 return num_samples * interp_bytes_per_sample;
935 }
936
937 /*
938 * Translates AC'97 ADC samples to user buffer:
939 * If mono, send only left channel to user buffer.
940 * If 8 bit samples, cvt from 16 to 8 bit before writing to user buffer.
941 * If decimating (no VRA), skip over src_factor audio frames.
942 */
943 static int
944 translate_to_user(struct dmabuf *db, char* userbuf, char* dmabuf,
945 int dmacount)
946 {
947 int sample, i;
948 int interp_bytes_per_sample;
949 int num_samples;
950 int mono = (db->num_channels == 1);
951 char usersample[12];
952
953 if (db->sample_size == 16 && !mono && db->src_factor == 1) {
954 /* no translation necessary, just copy
955 */
956 if (copy_to_user(userbuf, dmabuf, dmacount))
957 return -EFAULT;
958 return dmacount;
959 }
960
961 interp_bytes_per_sample = db->dma_bytes_per_sample * db->src_factor;
962 num_samples = dmacount / interp_bytes_per_sample;
963
964 for (sample = 0; sample < num_samples; sample++) {
965 for (i = 0; i < db->num_channels; i++) {
966 if (db->sample_size == 8)
967 usersample[i] =
968 S16_TO_U8(*((s16 *) (&dmabuf[i * 2])));
969 else
970 *((s16 *) (&usersample[i * 2])) =
971 *((s16 *) (&dmabuf[i * 2]));
972 }
973
974 if (copy_to_user(userbuf, usersample,
975 db->user_bytes_per_sample)) {
976 return -EFAULT;
977 }
978
979 userbuf += db->user_bytes_per_sample;
980 dmabuf += interp_bytes_per_sample;
981 }
982
983 return num_samples * interp_bytes_per_sample;
984 }
985
986 /*
987 * Copy audio data to/from user buffer from/to dma buffer, taking care
988 * that we wrap when reading/writing the dma buffer. Returns actual byte
989 * count written to or read from the dma buffer.
990 */
991 static int
992 copy_dmabuf_user(struct dmabuf *db, char* userbuf, int count, int to_user)
993 {
994 char *bufptr = to_user ? db->nextOut : db->nextIn;
995 char *bufend = db->rawbuf + db->dmasize;
996 int cnt, ret;
997
998 if (bufptr + count > bufend) {
999 int partial = (int) (bufend - bufptr);
1000 if (to_user) {
1001 if ((cnt = translate_to_user(db, userbuf,
1002 bufptr, partial)) < 0)
1003 return cnt;
1004 ret = cnt;
1005 if ((cnt = translate_to_user(db, userbuf + partial,
1006 db->rawbuf,
1007 count - partial)) < 0)
1008 return cnt;
1009 ret += cnt;
1010 } else {
1011 if ((cnt = translate_from_user(db, bufptr, userbuf,
1012 partial)) < 0)
1013 return cnt;
1014 ret = cnt;
1015 if ((cnt = translate_from_user(db, db->rawbuf,
1016 userbuf + partial,
1017 count - partial)) < 0)
1018 return cnt;
1019 ret += cnt;
1020 }
1021 } else {
1022 if (to_user)
1023 ret = translate_to_user(db, userbuf, bufptr, count);
1024 else
1025 ret = translate_from_user(db, bufptr, userbuf, count);
1026 }
1027
1028 return ret;
1029 }
1030
1031
1032 static ssize_t
1033 au1550_read(struct file *file, char *buffer, size_t count, loff_t *ppos)
1034 {
1035 struct au1550_state *s = (struct au1550_state *)file->private_data;
1036 struct dmabuf *db = &s->dma_adc;
1037 DECLARE_WAITQUEUE(wait, current);
1038 ssize_t ret;
1039 unsigned long flags;
1040 int cnt, usercnt, avail;
1041
1042 if (db->mapped)
1043 return -ENXIO;
1044 if (!access_ok(VERIFY_WRITE, buffer, count))
1045 return -EFAULT;
1046 ret = 0;
1047
1048 count *= db->cnt_factor;
1049
1050 mutex_lock(&s->sem);
1051 add_wait_queue(&db->wait, &wait);
1052
1053 while (count > 0) {
1054 /* wait for samples in ADC dma buffer
1055 */
1056 do {
1057 spin_lock_irqsave(&s->lock, flags);
1058 if (db->stopped)
1059 start_adc(s);
1060 avail = db->count;
1061 if (avail <= 0)
1062 __set_current_state(TASK_INTERRUPTIBLE);
1063 spin_unlock_irqrestore(&s->lock, flags);
1064 if (avail <= 0) {
1065 if (file->f_flags & O_NONBLOCK) {
1066 if (!ret)
1067 ret = -EAGAIN;
1068 goto out;
1069 }
1070 mutex_unlock(&s->sem);
1071 schedule();
1072 if (signal_pending(current)) {
1073 if (!ret)
1074 ret = -ERESTARTSYS;
1075 goto out2;
1076 }
1077 mutex_lock(&s->sem);
1078 }
1079 } while (avail <= 0);
1080
1081 /* copy from nextOut to user
1082 */
1083 if ((cnt = copy_dmabuf_user(db, buffer,
1084 count > avail ?
1085 avail : count, 1)) < 0) {
1086 if (!ret)
1087 ret = -EFAULT;
1088 goto out;
1089 }
1090
1091 spin_lock_irqsave(&s->lock, flags);
1092 db->count -= cnt;
1093 db->nextOut += cnt;
1094 if (db->nextOut >= db->rawbuf + db->dmasize)
1095 db->nextOut -= db->dmasize;
1096 spin_unlock_irqrestore(&s->lock, flags);
1097
1098 count -= cnt;
1099 usercnt = cnt / db->cnt_factor;
1100 buffer += usercnt;
1101 ret += usercnt;
1102 } /* while (count > 0) */
1103
1104 out:
1105 mutex_unlock(&s->sem);
1106 out2:
1107 remove_wait_queue(&db->wait, &wait);
1108 set_current_state(TASK_RUNNING);
1109 return ret;
1110 }
1111
1112 static ssize_t
1113 au1550_write(struct file *file, const char *buffer, size_t count, loff_t * ppos)
1114 {
1115 struct au1550_state *s = (struct au1550_state *)file->private_data;
1116 struct dmabuf *db = &s->dma_dac;
1117 DECLARE_WAITQUEUE(wait, current);
1118 ssize_t ret = 0;
1119 unsigned long flags;
1120 int cnt, usercnt, avail;
1121
1122 pr_debug("write: count=%d\n", count);
1123
1124 if (db->mapped)
1125 return -ENXIO;
1126 if (!access_ok(VERIFY_READ, buffer, count))
1127 return -EFAULT;
1128
1129 count *= db->cnt_factor;
1130
1131 mutex_lock(&s->sem);
1132 add_wait_queue(&db->wait, &wait);
1133
1134 while (count > 0) {
1135 /* wait for space in playback buffer
1136 */
1137 do {
1138 spin_lock_irqsave(&s->lock, flags);
1139 avail = (int) db->dmasize - db->count;
1140 if (avail <= 0)
1141 __set_current_state(TASK_INTERRUPTIBLE);
1142 spin_unlock_irqrestore(&s->lock, flags);
1143 if (avail <= 0) {
1144 if (file->f_flags & O_NONBLOCK) {
1145 if (!ret)
1146 ret = -EAGAIN;
1147 goto out;
1148 }
1149 mutex_unlock(&s->sem);
1150 schedule();
1151 if (signal_pending(current)) {
1152 if (!ret)
1153 ret = -ERESTARTSYS;
1154 goto out2;
1155 }
1156 mutex_lock(&s->sem);
1157 }
1158 } while (avail <= 0);
1159
1160 /* copy from user to nextIn
1161 */
1162 if ((cnt = copy_dmabuf_user(db, (char *) buffer,
1163 count > avail ?
1164 avail : count, 0)) < 0) {
1165 if (!ret)
1166 ret = -EFAULT;
1167 goto out;
1168 }
1169
1170 spin_lock_irqsave(&s->lock, flags);
1171 db->count += cnt;
1172 db->nextIn += cnt;
1173 if (db->nextIn >= db->rawbuf + db->dmasize)
1174 db->nextIn -= db->dmasize;
1175
1176 /* If the data is available, we want to keep two buffers
1177 * on the dma queue. If the queue count reaches zero,
1178 * we know the dma has stopped.
1179 */
1180 while ((db->dma_qcount < 2) && (db->count >= db->fragsize)) {
1181 if (au1xxx_dbdma_put_source(db->dmanr, db->nextOut,
1182 db->fragsize) == 0) {
1183 err("qcount < 2 and no ring room!");
1184 }
1185 db->nextOut += db->fragsize;
1186 if (db->nextOut >= db->rawbuf + db->dmasize)
1187 db->nextOut -= db->dmasize;
1188 db->total_bytes += db->dma_fragsize;
1189 if (db->dma_qcount == 0)
1190 start_dac(s);
1191 db->dma_qcount++;
1192 }
1193 spin_unlock_irqrestore(&s->lock, flags);
1194
1195 count -= cnt;
1196 usercnt = cnt / db->cnt_factor;
1197 buffer += usercnt;
1198 ret += usercnt;
1199 } /* while (count > 0) */
1200
1201 out:
1202 mutex_unlock(&s->sem);
1203 out2:
1204 remove_wait_queue(&db->wait, &wait);
1205 set_current_state(TASK_RUNNING);
1206 return ret;
1207 }
1208
1209
1210 /* No kernel lock - we have our own spinlock */
1211 static unsigned int
1212 au1550_poll(struct file *file, struct poll_table_struct *wait)
1213 {
1214 struct au1550_state *s = (struct au1550_state *)file->private_data;
1215 unsigned long flags;
1216 unsigned int mask = 0;
1217
1218 if (file->f_mode & FMODE_WRITE) {
1219 if (!s->dma_dac.ready)
1220 return 0;
1221 poll_wait(file, &s->dma_dac.wait, wait);
1222 }
1223 if (file->f_mode & FMODE_READ) {
1224 if (!s->dma_adc.ready)
1225 return 0;
1226 poll_wait(file, &s->dma_adc.wait, wait);
1227 }
1228
1229 spin_lock_irqsave(&s->lock, flags);
1230
1231 if (file->f_mode & FMODE_READ) {
1232 if (s->dma_adc.count >= (signed)s->dma_adc.dma_fragsize)
1233 mask |= POLLIN | POLLRDNORM;
1234 }
1235 if (file->f_mode & FMODE_WRITE) {
1236 if (s->dma_dac.mapped) {
1237 if (s->dma_dac.count >=
1238 (signed)s->dma_dac.dma_fragsize)
1239 mask |= POLLOUT | POLLWRNORM;
1240 } else {
1241 if ((signed) s->dma_dac.dmasize >=
1242 s->dma_dac.count + (signed)s->dma_dac.dma_fragsize)
1243 mask |= POLLOUT | POLLWRNORM;
1244 }
1245 }
1246 spin_unlock_irqrestore(&s->lock, flags);
1247 return mask;
1248 }
1249
1250 static int
1251 au1550_mmap(struct file *file, struct vm_area_struct *vma)
1252 {
1253 struct au1550_state *s = (struct au1550_state *)file->private_data;
1254 struct dmabuf *db;
1255 unsigned long size;
1256 int ret = 0;
1257
1258 lock_kernel();
1259 mutex_lock(&s->sem);
1260 if (vma->vm_flags & VM_WRITE)
1261 db = &s->dma_dac;
1262 else if (vma->vm_flags & VM_READ)
1263 db = &s->dma_adc;
1264 else {
1265 ret = -EINVAL;
1266 goto out;
1267 }
1268 if (vma->vm_pgoff != 0) {
1269 ret = -EINVAL;
1270 goto out;
1271 }
1272 size = vma->vm_end - vma->vm_start;
1273 if (size > (PAGE_SIZE << db->buforder)) {
1274 ret = -EINVAL;
1275 goto out;
1276 }
1277 if (remap_pfn_range(vma, vma->vm_start, page_to_pfn(virt_to_page(db->rawbuf)),
1278 size, vma->vm_page_prot)) {
1279 ret = -EAGAIN;
1280 goto out;
1281 }
1282 vma->vm_flags &= ~VM_IO;
1283 db->mapped = 1;
1284 out:
1285 mutex_unlock(&s->sem);
1286 unlock_kernel();
1287 return ret;
1288 }
1289
1290 #ifdef DEBUG
1291 static struct ioctl_str_t {
1292 unsigned int cmd;
1293 const char *str;
1294 } ioctl_str[] = {
1295 {SNDCTL_DSP_RESET, "SNDCTL_DSP_RESET"},
1296 {SNDCTL_DSP_SYNC, "SNDCTL_DSP_SYNC"},
1297 {SNDCTL_DSP_SPEED, "SNDCTL_DSP_SPEED"},
1298 {SNDCTL_DSP_STEREO, "SNDCTL_DSP_STEREO"},
1299 {SNDCTL_DSP_GETBLKSIZE, "SNDCTL_DSP_GETBLKSIZE"},
1300 {SNDCTL_DSP_SAMPLESIZE, "SNDCTL_DSP_SAMPLESIZE"},
1301 {SNDCTL_DSP_CHANNELS, "SNDCTL_DSP_CHANNELS"},
1302 {SOUND_PCM_WRITE_CHANNELS, "SOUND_PCM_WRITE_CHANNELS"},
1303 {SOUND_PCM_WRITE_FILTER, "SOUND_PCM_WRITE_FILTER"},
1304 {SNDCTL_DSP_POST, "SNDCTL_DSP_POST"},
1305 {SNDCTL_DSP_SUBDIVIDE, "SNDCTL_DSP_SUBDIVIDE"},
1306 {SNDCTL_DSP_SETFRAGMENT, "SNDCTL_DSP_SETFRAGMENT"},
1307 {SNDCTL_DSP_GETFMTS, "SNDCTL_DSP_GETFMTS"},
1308 {SNDCTL_DSP_SETFMT, "SNDCTL_DSP_SETFMT"},
1309 {SNDCTL_DSP_GETOSPACE, "SNDCTL_DSP_GETOSPACE"},
1310 {SNDCTL_DSP_GETISPACE, "SNDCTL_DSP_GETISPACE"},
1311 {SNDCTL_DSP_NONBLOCK, "SNDCTL_DSP_NONBLOCK"},
1312 {SNDCTL_DSP_GETCAPS, "SNDCTL_DSP_GETCAPS"},
1313 {SNDCTL_DSP_GETTRIGGER, "SNDCTL_DSP_GETTRIGGER"},
1314 {SNDCTL_DSP_SETTRIGGER, "SNDCTL_DSP_SETTRIGGER"},
1315 {SNDCTL_DSP_GETIPTR, "SNDCTL_DSP_GETIPTR"},
1316 {SNDCTL_DSP_GETOPTR, "SNDCTL_DSP_GETOPTR"},
1317 {SNDCTL_DSP_MAPINBUF, "SNDCTL_DSP_MAPINBUF"},
1318 {SNDCTL_DSP_MAPOUTBUF, "SNDCTL_DSP_MAPOUTBUF"},
1319 {SNDCTL_DSP_SETSYNCRO, "SNDCTL_DSP_SETSYNCRO"},
1320 {SNDCTL_DSP_SETDUPLEX, "SNDCTL_DSP_SETDUPLEX"},
1321 {SNDCTL_DSP_GETODELAY, "SNDCTL_DSP_GETODELAY"},
1322 {SNDCTL_DSP_GETCHANNELMASK, "SNDCTL_DSP_GETCHANNELMASK"},
1323 {SNDCTL_DSP_BIND_CHANNEL, "SNDCTL_DSP_BIND_CHANNEL"},
1324 {OSS_GETVERSION, "OSS_GETVERSION"},
1325 {SOUND_PCM_READ_RATE, "SOUND_PCM_READ_RATE"},
1326 {SOUND_PCM_READ_CHANNELS, "SOUND_PCM_READ_CHANNELS"},
1327 {SOUND_PCM_READ_BITS, "SOUND_PCM_READ_BITS"},
1328 {SOUND_PCM_READ_FILTER, "SOUND_PCM_READ_FILTER"}
1329 };
1330 #endif
1331
1332 static int
1333 dma_count_done(struct dmabuf *db)
1334 {
1335 if (db->stopped)
1336 return 0;
1337
1338 return db->dma_fragsize - au1xxx_get_dma_residue(db->dmanr);
1339 }
1340
1341
1342 static int
1343 au1550_ioctl(struct inode *inode, struct file *file, unsigned int cmd,
1344 unsigned long arg)
1345 {
1346 struct au1550_state *s = (struct au1550_state *)file->private_data;
1347 unsigned long flags;
1348 audio_buf_info abinfo;
1349 count_info cinfo;
1350 int count;
1351 int val, mapped, ret, diff;
1352
1353 mapped = ((file->f_mode & FMODE_WRITE) && s->dma_dac.mapped) ||
1354 ((file->f_mode & FMODE_READ) && s->dma_adc.mapped);
1355
1356 #ifdef DEBUG
1357 for (count = 0; count < ARRAY_SIZE(ioctl_str); count++) {
1358 if (ioctl_str[count].cmd == cmd)
1359 break;
1360 }
1361 if (count < ARRAY_SIZE(ioctl_str))
1362 pr_debug("ioctl %s, arg=0x%lxn", ioctl_str[count].str, arg);
1363 else
1364 pr_debug("ioctl 0x%x unknown, arg=0x%lx\n", cmd, arg);
1365 #endif
1366
1367 switch (cmd) {
1368 case OSS_GETVERSION:
1369 return put_user(SOUND_VERSION, (int *) arg);
1370
1371 case SNDCTL_DSP_SYNC:
1372 if (file->f_mode & FMODE_WRITE)
1373 return drain_dac(s, file->f_flags & O_NONBLOCK);
1374 return 0;
1375
1376 case SNDCTL_DSP_SETDUPLEX:
1377 return 0;
1378
1379 case SNDCTL_DSP_GETCAPS:
1380 return put_user(DSP_CAP_DUPLEX | DSP_CAP_REALTIME |
1381 DSP_CAP_TRIGGER | DSP_CAP_MMAP, (int *)arg);
1382
1383 case SNDCTL_DSP_RESET:
1384 if (file->f_mode & FMODE_WRITE) {
1385 stop_dac(s);
1386 synchronize_irq();
1387 s->dma_dac.count = s->dma_dac.total_bytes = 0;
1388 s->dma_dac.nextIn = s->dma_dac.nextOut =
1389 s->dma_dac.rawbuf;
1390 }
1391 if (file->f_mode & FMODE_READ) {
1392 stop_adc(s);
1393 synchronize_irq();
1394 s->dma_adc.count = s->dma_adc.total_bytes = 0;
1395 s->dma_adc.nextIn = s->dma_adc.nextOut =
1396 s->dma_adc.rawbuf;
1397 }
1398 return 0;
1399
1400 case SNDCTL_DSP_SPEED:
1401 if (get_user(val, (int *) arg))
1402 return -EFAULT;
1403 if (val >= 0) {
1404 if (file->f_mode & FMODE_READ) {
1405 stop_adc(s);
1406 set_adc_rate(s, val);
1407 }
1408 if (file->f_mode & FMODE_WRITE) {
1409 stop_dac(s);
1410 set_dac_rate(s, val);
1411 }
1412 if (s->open_mode & FMODE_READ)
1413 if ((ret = prog_dmabuf_adc(s)))
1414 return ret;
1415 if (s->open_mode & FMODE_WRITE)
1416 if ((ret = prog_dmabuf_dac(s)))
1417 return ret;
1418 }
1419 return put_user((file->f_mode & FMODE_READ) ?
1420 s->dma_adc.sample_rate :
1421 s->dma_dac.sample_rate,
1422 (int *)arg);
1423
1424 case SNDCTL_DSP_STEREO:
1425 if (get_user(val, (int *) arg))
1426 return -EFAULT;
1427 if (file->f_mode & FMODE_READ) {
1428 stop_adc(s);
1429 s->dma_adc.num_channels = val ? 2 : 1;
1430 if ((ret = prog_dmabuf_adc(s)))
1431 return ret;
1432 }
1433 if (file->f_mode & FMODE_WRITE) {
1434 stop_dac(s);
1435 s->dma_dac.num_channels = val ? 2 : 1;
1436 if (s->codec_ext_caps & AC97_EXT_DACS) {
1437 /* disable surround and center/lfe in AC'97
1438 */
1439 u16 ext_stat = rdcodec(s->codec,
1440 AC97_EXTENDED_STATUS);
1441 wrcodec(s->codec, AC97_EXTENDED_STATUS,
1442 ext_stat | (AC97_EXTSTAT_PRI |
1443 AC97_EXTSTAT_PRJ |
1444 AC97_EXTSTAT_PRK));
1445 }
1446 if ((ret = prog_dmabuf_dac(s)))
1447 return ret;
1448 }
1449 return 0;
1450
1451 case SNDCTL_DSP_CHANNELS:
1452 if (get_user(val, (int *) arg))
1453 return -EFAULT;
1454 if (val != 0) {
1455 if (file->f_mode & FMODE_READ) {
1456 if (val < 0 || val > 2)
1457 return -EINVAL;
1458 stop_adc(s);
1459 s->dma_adc.num_channels = val;
1460 if ((ret = prog_dmabuf_adc(s)))
1461 return ret;
1462 }
1463 if (file->f_mode & FMODE_WRITE) {
1464 switch (val) {
1465 case 1:
1466 case 2:
1467 break;
1468 case 3:
1469 case 5:
1470 return -EINVAL;
1471 case 4:
1472 if (!(s->codec_ext_caps &
1473 AC97_EXTID_SDAC))
1474 return -EINVAL;
1475 break;
1476 case 6:
1477 if ((s->codec_ext_caps &
1478 AC97_EXT_DACS) != AC97_EXT_DACS)
1479 return -EINVAL;
1480 break;
1481 default:
1482 return -EINVAL;
1483 }
1484
1485 stop_dac(s);
1486 if (val <= 2 &&
1487 (s->codec_ext_caps & AC97_EXT_DACS)) {
1488 /* disable surround and center/lfe
1489 * channels in AC'97
1490 */
1491 u16 ext_stat =
1492 rdcodec(s->codec,
1493 AC97_EXTENDED_STATUS);
1494 wrcodec(s->codec,
1495 AC97_EXTENDED_STATUS,
1496 ext_stat | (AC97_EXTSTAT_PRI |
1497 AC97_EXTSTAT_PRJ |
1498 AC97_EXTSTAT_PRK));
1499 } else if (val >= 4) {
1500 /* enable surround, center/lfe
1501 * channels in AC'97
1502 */
1503 u16 ext_stat =
1504 rdcodec(s->codec,
1505 AC97_EXTENDED_STATUS);
1506 ext_stat &= ~AC97_EXTSTAT_PRJ;
1507 if (val == 6)
1508 ext_stat &=
1509 ~(AC97_EXTSTAT_PRI |
1510 AC97_EXTSTAT_PRK);
1511 wrcodec(s->codec,
1512 AC97_EXTENDED_STATUS,
1513 ext_stat);
1514 }
1515
1516 s->dma_dac.num_channels = val;
1517 if ((ret = prog_dmabuf_dac(s)))
1518 return ret;
1519 }
1520 }
1521 return put_user(val, (int *) arg);
1522
1523 case SNDCTL_DSP_GETFMTS: /* Returns a mask */
1524 return put_user(AFMT_S16_LE | AFMT_U8, (int *) arg);
1525
1526 case SNDCTL_DSP_SETFMT: /* Selects ONE fmt */
1527 if (get_user(val, (int *) arg))
1528 return -EFAULT;
1529 if (val != AFMT_QUERY) {
1530 if (file->f_mode & FMODE_READ) {
1531 stop_adc(s);
1532 if (val == AFMT_S16_LE)
1533 s->dma_adc.sample_size = 16;
1534 else {
1535 val = AFMT_U8;
1536 s->dma_adc.sample_size = 8;
1537 }
1538 if ((ret = prog_dmabuf_adc(s)))
1539 return ret;
1540 }
1541 if (file->f_mode & FMODE_WRITE) {
1542 stop_dac(s);
1543 if (val == AFMT_S16_LE)
1544 s->dma_dac.sample_size = 16;
1545 else {
1546 val = AFMT_U8;
1547 s->dma_dac.sample_size = 8;
1548 }
1549 if ((ret = prog_dmabuf_dac(s)))
1550 return ret;
1551 }
1552 } else {
1553 if (file->f_mode & FMODE_READ)
1554 val = (s->dma_adc.sample_size == 16) ?
1555 AFMT_S16_LE : AFMT_U8;
1556 else
1557 val = (s->dma_dac.sample_size == 16) ?
1558 AFMT_S16_LE : AFMT_U8;
1559 }
1560 return put_user(val, (int *) arg);
1561
1562 case SNDCTL_DSP_POST:
1563 return 0;
1564
1565 case SNDCTL_DSP_GETTRIGGER:
1566 val = 0;
1567 spin_lock_irqsave(&s->lock, flags);
1568 if (file->f_mode & FMODE_READ && !s->dma_adc.stopped)
1569 val |= PCM_ENABLE_INPUT;
1570 if (file->f_mode & FMODE_WRITE && !s->dma_dac.stopped)
1571 val |= PCM_ENABLE_OUTPUT;
1572 spin_unlock_irqrestore(&s->lock, flags);
1573 return put_user(val, (int *) arg);
1574
1575 case SNDCTL_DSP_SETTRIGGER:
1576 if (get_user(val, (int *) arg))
1577 return -EFAULT;
1578 if (file->f_mode & FMODE_READ) {
1579 if (val & PCM_ENABLE_INPUT) {
1580 spin_lock_irqsave(&s->lock, flags);
1581 start_adc(s);
1582 spin_unlock_irqrestore(&s->lock, flags);
1583 } else
1584 stop_adc(s);
1585 }
1586 if (file->f_mode & FMODE_WRITE) {
1587 if (val & PCM_ENABLE_OUTPUT) {
1588 spin_lock_irqsave(&s->lock, flags);
1589 start_dac(s);
1590 spin_unlock_irqrestore(&s->lock, flags);
1591 } else
1592 stop_dac(s);
1593 }
1594 return 0;
1595
1596 case SNDCTL_DSP_GETOSPACE:
1597 if (!(file->f_mode & FMODE_WRITE))
1598 return -EINVAL;
1599 abinfo.fragsize = s->dma_dac.fragsize;
1600 spin_lock_irqsave(&s->lock, flags);
1601 count = s->dma_dac.count;
1602 count -= dma_count_done(&s->dma_dac);
1603 spin_unlock_irqrestore(&s->lock, flags);
1604 if (count < 0)
1605 count = 0;
1606 abinfo.bytes = (s->dma_dac.dmasize - count) /
1607 s->dma_dac.cnt_factor;
1608 abinfo.fragstotal = s->dma_dac.numfrag;
1609 abinfo.fragments = abinfo.bytes >> s->dma_dac.fragshift;
1610 pr_debug("ioctl SNDCTL_DSP_GETOSPACE: bytes=%d, fragments=%d\n", abinfo.bytes, abinfo.fragments);
1611 return copy_to_user((void *) arg, &abinfo,
1612 sizeof(abinfo)) ? -EFAULT : 0;
1613
1614 case SNDCTL_DSP_GETISPACE:
1615 if (!(file->f_mode & FMODE_READ))
1616 return -EINVAL;
1617 abinfo.fragsize = s->dma_adc.fragsize;
1618 spin_lock_irqsave(&s->lock, flags);
1619 count = s->dma_adc.count;
1620 count += dma_count_done(&s->dma_adc);
1621 spin_unlock_irqrestore(&s->lock, flags);
1622 if (count < 0)
1623 count = 0;
1624 abinfo.bytes = count / s->dma_adc.cnt_factor;
1625 abinfo.fragstotal = s->dma_adc.numfrag;
1626 abinfo.fragments = abinfo.bytes >> s->dma_adc.fragshift;
1627 return copy_to_user((void *) arg, &abinfo,
1628 sizeof(abinfo)) ? -EFAULT : 0;
1629
1630 case SNDCTL_DSP_NONBLOCK:
1631 file->f_flags |= O_NONBLOCK;
1632 return 0;
1633
1634 case SNDCTL_DSP_GETODELAY:
1635 if (!(file->f_mode & FMODE_WRITE))
1636 return -EINVAL;
1637 spin_lock_irqsave(&s->lock, flags);
1638 count = s->dma_dac.count;
1639 count -= dma_count_done(&s->dma_dac);
1640 spin_unlock_irqrestore(&s->lock, flags);
1641 if (count < 0)
1642 count = 0;
1643 count /= s->dma_dac.cnt_factor;
1644 return put_user(count, (int *) arg);
1645
1646 case SNDCTL_DSP_GETIPTR:
1647 if (!(file->f_mode & FMODE_READ))
1648 return -EINVAL;
1649 spin_lock_irqsave(&s->lock, flags);
1650 cinfo.bytes = s->dma_adc.total_bytes;
1651 count = s->dma_adc.count;
1652 if (!s->dma_adc.stopped) {
1653 diff = dma_count_done(&s->dma_adc);
1654 count += diff;
1655 cinfo.bytes += diff;
1656 cinfo.ptr = virt_to_phys(s->dma_adc.nextIn) + diff -
1657 virt_to_phys(s->dma_adc.rawbuf);
1658 } else
1659 cinfo.ptr = virt_to_phys(s->dma_adc.nextIn) -
1660 virt_to_phys(s->dma_adc.rawbuf);
1661 if (s->dma_adc.mapped)
1662 s->dma_adc.count &= (s->dma_adc.dma_fragsize-1);
1663 spin_unlock_irqrestore(&s->lock, flags);
1664 if (count < 0)
1665 count = 0;
1666 cinfo.blocks = count >> s->dma_adc.fragshift;
1667 return copy_to_user((void *) arg, &cinfo, sizeof(cinfo));
1668
1669 case SNDCTL_DSP_GETOPTR:
1670 if (!(file->f_mode & FMODE_READ))
1671 return -EINVAL;
1672 spin_lock_irqsave(&s->lock, flags);
1673 cinfo.bytes = s->dma_dac.total_bytes;
1674 count = s->dma_dac.count;
1675 if (!s->dma_dac.stopped) {
1676 diff = dma_count_done(&s->dma_dac);
1677 count -= diff;
1678 cinfo.bytes += diff;
1679 cinfo.ptr = virt_to_phys(s->dma_dac.nextOut) + diff -
1680 virt_to_phys(s->dma_dac.rawbuf);
1681 } else
1682 cinfo.ptr = virt_to_phys(s->dma_dac.nextOut) -
1683 virt_to_phys(s->dma_dac.rawbuf);
1684 if (s->dma_dac.mapped)
1685 s->dma_dac.count &= (s->dma_dac.dma_fragsize-1);
1686 spin_unlock_irqrestore(&s->lock, flags);
1687 if (count < 0)
1688 count = 0;
1689 cinfo.blocks = count >> s->dma_dac.fragshift;
1690 return copy_to_user((void *) arg, &cinfo, sizeof(cinfo));
1691
1692 case SNDCTL_DSP_GETBLKSIZE:
1693 if (file->f_mode & FMODE_WRITE)
1694 return put_user(s->dma_dac.fragsize, (int *) arg);
1695 else
1696 return put_user(s->dma_adc.fragsize, (int *) arg);
1697
1698 case SNDCTL_DSP_SETFRAGMENT:
1699 if (get_user(val, (int *) arg))
1700 return -EFAULT;
1701 if (file->f_mode & FMODE_READ) {
1702 stop_adc(s);
1703 s->dma_adc.ossfragshift = val & 0xffff;
1704 s->dma_adc.ossmaxfrags = (val >> 16) & 0xffff;
1705 if (s->dma_adc.ossfragshift < 4)
1706 s->dma_adc.ossfragshift = 4;
1707 if (s->dma_adc.ossfragshift > 15)
1708 s->dma_adc.ossfragshift = 15;
1709 if (s->dma_adc.ossmaxfrags < 4)
1710 s->dma_adc.ossmaxfrags = 4;
1711 if ((ret = prog_dmabuf_adc(s)))
1712 return ret;
1713 }
1714 if (file->f_mode & FMODE_WRITE) {
1715 stop_dac(s);
1716 s->dma_dac.ossfragshift = val & 0xffff;
1717 s->dma_dac.ossmaxfrags = (val >> 16) & 0xffff;
1718 if (s->dma_dac.ossfragshift < 4)
1719 s->dma_dac.ossfragshift = 4;
1720 if (s->dma_dac.ossfragshift > 15)
1721 s->dma_dac.ossfragshift = 15;
1722 if (s->dma_dac.ossmaxfrags < 4)
1723 s->dma_dac.ossmaxfrags = 4;
1724 if ((ret = prog_dmabuf_dac(s)))
1725 return ret;
1726 }
1727 return 0;
1728
1729 case SNDCTL_DSP_SUBDIVIDE:
1730 if ((file->f_mode & FMODE_READ && s->dma_adc.subdivision) ||
1731 (file->f_mode & FMODE_WRITE && s->dma_dac.subdivision))
1732 return -EINVAL;
1733 if (get_user(val, (int *) arg))
1734 return -EFAULT;
1735 if (val != 1 && val != 2 && val != 4)
1736 return -EINVAL;
1737 if (file->f_mode & FMODE_READ) {
1738 stop_adc(s);
1739 s->dma_adc.subdivision = val;
1740 if ((ret = prog_dmabuf_adc(s)))
1741 return ret;
1742 }
1743 if (file->f_mode & FMODE_WRITE) {
1744 stop_dac(s);
1745 s->dma_dac.subdivision = val;
1746 if ((ret = prog_dmabuf_dac(s)))
1747 return ret;
1748 }
1749 return 0;
1750
1751 case SOUND_PCM_READ_RATE:
1752 return put_user((file->f_mode & FMODE_READ) ?
1753 s->dma_adc.sample_rate :
1754 s->dma_dac.sample_rate,
1755 (int *)arg);
1756
1757 case SOUND_PCM_READ_CHANNELS:
1758 if (file->f_mode & FMODE_READ)
1759 return put_user(s->dma_adc.num_channels, (int *)arg);
1760 else
1761 return put_user(s->dma_dac.num_channels, (int *)arg);
1762
1763 case SOUND_PCM_READ_BITS:
1764 if (file->f_mode & FMODE_READ)
1765 return put_user(s->dma_adc.sample_size, (int *)arg);
1766 else
1767 return put_user(s->dma_dac.sample_size, (int *)arg);
1768
1769 case SOUND_PCM_WRITE_FILTER:
1770 case SNDCTL_DSP_SETSYNCRO:
1771 case SOUND_PCM_READ_FILTER:
1772 return -EINVAL;
1773 }
1774
1775 return mixdev_ioctl(s->codec, cmd, arg);
1776 }
1777
1778
1779 static int
1780 au1550_open(struct inode *inode, struct file *file)
1781 {
1782 int minor = MINOR(inode->i_rdev);
1783 DECLARE_WAITQUEUE(wait, current);
1784 struct au1550_state *s = &au1550_state;
1785 int ret;
1786
1787 #ifdef DEBUG
1788 if (file->f_flags & O_NONBLOCK)
1789 pr_debug("open: non-blocking\n");
1790 else
1791 pr_debug("open: blocking\n");
1792 #endif
1793
1794 file->private_data = s;
1795 /* wait for device to become free */
1796 mutex_lock(&s->open_mutex);
1797 while (s->open_mode & file->f_mode) {
1798 if (file->f_flags & O_NONBLOCK) {
1799 mutex_unlock(&s->open_mutex);
1800 return -EBUSY;
1801 }
1802 add_wait_queue(&s->open_wait, &wait);
1803 __set_current_state(TASK_INTERRUPTIBLE);
1804 mutex_unlock(&s->open_mutex);
1805 schedule();
1806 remove_wait_queue(&s->open_wait, &wait);
1807 set_current_state(TASK_RUNNING);
1808 if (signal_pending(current))
1809 return -ERESTARTSYS;
1810 mutex_lock(&s->open_mutex);
1811 }
1812
1813 stop_dac(s);
1814 stop_adc(s);
1815
1816 if (file->f_mode & FMODE_READ) {
1817 s->dma_adc.ossfragshift = s->dma_adc.ossmaxfrags =
1818 s->dma_adc.subdivision = s->dma_adc.total_bytes = 0;
1819 s->dma_adc.num_channels = 1;
1820 s->dma_adc.sample_size = 8;
1821 set_adc_rate(s, 8000);
1822 if ((minor & 0xf) == SND_DEV_DSP16)
1823 s->dma_adc.sample_size = 16;
1824 }
1825
1826 if (file->f_mode & FMODE_WRITE) {
1827 s->dma_dac.ossfragshift = s->dma_dac.ossmaxfrags =
1828 s->dma_dac.subdivision = s->dma_dac.total_bytes = 0;
1829 s->dma_dac.num_channels = 1;
1830 s->dma_dac.sample_size = 8;
1831 set_dac_rate(s, 8000);
1832 if ((minor & 0xf) == SND_DEV_DSP16)
1833 s->dma_dac.sample_size = 16;
1834 }
1835
1836 if (file->f_mode & FMODE_READ) {
1837 if ((ret = prog_dmabuf_adc(s)))
1838 return ret;
1839 }
1840 if (file->f_mode & FMODE_WRITE) {
1841 if ((ret = prog_dmabuf_dac(s)))
1842 return ret;
1843 }
1844
1845 s->open_mode |= file->f_mode & (FMODE_READ | FMODE_WRITE);
1846 mutex_unlock(&s->open_mutex);
1847 mutex_init(&s->sem);
1848 return 0;
1849 }
1850
1851 static int
1852 au1550_release(struct inode *inode, struct file *file)
1853 {
1854 struct au1550_state *s = (struct au1550_state *)file->private_data;
1855
1856 lock_kernel();
1857
1858 if (file->f_mode & FMODE_WRITE) {
1859 unlock_kernel();
1860 drain_dac(s, file->f_flags & O_NONBLOCK);
1861 lock_kernel();
1862 }
1863
1864 mutex_lock(&s->open_mutex);
1865 if (file->f_mode & FMODE_WRITE) {
1866 stop_dac(s);
1867 kfree(s->dma_dac.rawbuf);
1868 s->dma_dac.rawbuf = NULL;
1869 }
1870 if (file->f_mode & FMODE_READ) {
1871 stop_adc(s);
1872 kfree(s->dma_adc.rawbuf);
1873 s->dma_adc.rawbuf = NULL;
1874 }
1875 s->open_mode &= ((~file->f_mode) & (FMODE_READ|FMODE_WRITE));
1876 mutex_unlock(&s->open_mutex);
1877 wake_up(&s->open_wait);
1878 unlock_kernel();
1879 return 0;
1880 }
1881
1882 static /*const */ struct file_operations au1550_audio_fops = {
1883 owner: THIS_MODULE,
1884 llseek: au1550_llseek,
1885 read: au1550_read,
1886 write: au1550_write,
1887 poll: au1550_poll,
1888 ioctl: au1550_ioctl,
1889 mmap: au1550_mmap,
1890 open: au1550_open,
1891 release: au1550_release,
1892 };
1893
1894 MODULE_AUTHOR("Advanced Micro Devices (AMD), dan@embeddededge.com");
1895 MODULE_DESCRIPTION("Au1550 AC97 Audio Driver");
1896 MODULE_LICENSE("GPL");
1897
1898
1899 static int __devinit
1900 au1550_probe(void)
1901 {
1902 struct au1550_state *s = &au1550_state;
1903 int val;
1904
1905 memset(s, 0, sizeof(struct au1550_state));
1906
1907 init_waitqueue_head(&s->dma_adc.wait);
1908 init_waitqueue_head(&s->dma_dac.wait);
1909 init_waitqueue_head(&s->open_wait);
1910 mutex_init(&s->open_mutex);
1911 spin_lock_init(&s->lock);
1912
1913 s->codec = ac97_alloc_codec();
1914 if(s->codec == NULL) {
1915 err("Out of memory");
1916 return -1;
1917 }
1918 s->codec->private_data = s;
1919 s->codec->id = 0;
1920 s->codec->codec_read = rdcodec;
1921 s->codec->codec_write = wrcodec;
1922 s->codec->codec_wait = waitcodec;
1923
1924 if (!request_mem_region(CPHYSADDR(AC97_PSC_SEL),
1925 0x30, "Au1550 AC97")) {
1926 err("AC'97 ports in use");
1927 }
1928
1929 /* Allocate the DMA Channels
1930 */
1931 if ((s->dma_dac.dmanr = au1xxx_dbdma_chan_alloc(DBDMA_MEM_CHAN,
1932 DBDMA_AC97_TX_CHAN, dac_dma_interrupt, (void *)s)) == 0) {
1933 err("Can't get DAC DMA");
1934 goto err_dma1;
1935 }
1936 au1xxx_dbdma_set_devwidth(s->dma_dac.dmanr, 16);
1937 if (au1xxx_dbdma_ring_alloc(s->dma_dac.dmanr,
1938 NUM_DBDMA_DESCRIPTORS) == 0) {
1939 err("Can't get DAC DMA descriptors");
1940 goto err_dma1;
1941 }
1942
1943 if ((s->dma_adc.dmanr = au1xxx_dbdma_chan_alloc(DBDMA_AC97_RX_CHAN,
1944 DBDMA_MEM_CHAN, adc_dma_interrupt, (void *)s)) == 0) {
1945 err("Can't get ADC DMA");
1946 goto err_dma2;
1947 }
1948 au1xxx_dbdma_set_devwidth(s->dma_adc.dmanr, 16);
1949 if (au1xxx_dbdma_ring_alloc(s->dma_adc.dmanr,
1950 NUM_DBDMA_DESCRIPTORS) == 0) {
1951 err("Can't get ADC DMA descriptors");
1952 goto err_dma2;
1953 }
1954
1955 pr_info("DAC: DMA%d, ADC: DMA%d", DBDMA_AC97_TX_CHAN, DBDMA_AC97_RX_CHAN);
1956
1957 /* register devices */
1958
1959 if ((s->dev_audio = register_sound_dsp(&au1550_audio_fops, -1)) < 0)
1960 goto err_dev1;
1961 if ((s->codec->dev_mixer =
1962 register_sound_mixer(&au1550_mixer_fops, -1)) < 0)
1963 goto err_dev2;
1964
1965 /* The GPIO for the appropriate PSC was configured by the
1966 * board specific start up.
1967 *
1968 * configure PSC for AC'97
1969 */
1970 au_writel(0, AC97_PSC_CTRL); /* Disable PSC */
1971 au_sync();
1972 au_writel((PSC_SEL_CLK_SERCLK | PSC_SEL_PS_AC97MODE), AC97_PSC_SEL);
1973 au_sync();
1974
1975 /* cold reset the AC'97
1976 */
1977 au_writel(PSC_AC97RST_RST, PSC_AC97RST);
1978 au_sync();
1979 au1550_delay(10);
1980 au_writel(0, PSC_AC97RST);
1981 au_sync();
1982
1983 /* need to delay around 500msec(bleech) to give
1984 some CODECs enough time to wakeup */
1985 au1550_delay(500);
1986
1987 /* warm reset the AC'97 to start the bitclk
1988 */
1989 au_writel(PSC_AC97RST_SNC, PSC_AC97RST);
1990 au_sync();
1991 udelay(100);
1992 au_writel(0, PSC_AC97RST);
1993 au_sync();
1994
1995 /* Enable PSC
1996 */
1997 au_writel(PSC_CTRL_ENABLE, AC97_PSC_CTRL);
1998 au_sync();
1999
2000 /* Wait for PSC ready.
2001 */
2002 do {
2003 val = au_readl(PSC_AC97STAT);
2004 au_sync();
2005 } while ((val & PSC_AC97STAT_SR) == 0);
2006
2007 /* Configure AC97 controller.
2008 * Deep FIFO, 16-bit sample, DMA, make sure DMA matches fifo size.
2009 */
2010 val = PSC_AC97CFG_SET_LEN(16);
2011 val |= PSC_AC97CFG_RT_FIFO8 | PSC_AC97CFG_TT_FIFO8;
2012
2013 /* Enable device so we can at least
2014 * talk over the AC-link.
2015 */
2016 au_writel(val, PSC_AC97CFG);
2017 au_writel(PSC_AC97MSK_ALLMASK, PSC_AC97MSK);
2018 au_sync();
2019 val |= PSC_AC97CFG_DE_ENABLE;
2020 au_writel(val, PSC_AC97CFG);
2021 au_sync();
2022
2023 /* Wait for Device ready.
2024 */
2025 do {
2026 val = au_readl(PSC_AC97STAT);
2027 au_sync();
2028 } while ((val & PSC_AC97STAT_DR) == 0);
2029
2030 /* codec init */
2031 if (!ac97_probe_codec(s->codec))
2032 goto err_dev3;
2033
2034 s->codec_base_caps = rdcodec(s->codec, AC97_RESET);
2035 s->codec_ext_caps = rdcodec(s->codec, AC97_EXTENDED_ID);
2036 pr_info("AC'97 Base/Extended ID = %04x/%04x",
2037 s->codec_base_caps, s->codec_ext_caps);
2038
2039 if (!(s->codec_ext_caps & AC97_EXTID_VRA)) {
2040 /* codec does not support VRA
2041 */
2042 s->no_vra = 1;
2043 } else if (!vra) {
2044 /* Boot option says disable VRA
2045 */
2046 u16 ac97_extstat = rdcodec(s->codec, AC97_EXTENDED_STATUS);
2047 wrcodec(s->codec, AC97_EXTENDED_STATUS,
2048 ac97_extstat & ~AC97_EXTSTAT_VRA);
2049 s->no_vra = 1;
2050 }
2051 if (s->no_vra)
2052 pr_info("no VRA, interpolating and decimating");
2053
2054 /* set mic to be the recording source */
2055 val = SOUND_MASK_MIC;
2056 mixdev_ioctl(s->codec, SOUND_MIXER_WRITE_RECSRC,
2057 (unsigned long) &val);
2058
2059 return 0;
2060
2061 err_dev3:
2062 unregister_sound_mixer(s->codec->dev_mixer);
2063 err_dev2:
2064 unregister_sound_dsp(s->dev_audio);
2065 err_dev1:
2066 au1xxx_dbdma_chan_free(s->dma_adc.dmanr);
2067 err_dma2:
2068 au1xxx_dbdma_chan_free(s->dma_dac.dmanr);
2069 err_dma1:
2070 release_mem_region(CPHYSADDR(AC97_PSC_SEL), 0x30);
2071
2072 ac97_release_codec(s->codec);
2073 return -1;
2074 }
2075
2076 static void __devinit
2077 au1550_remove(void)
2078 {
2079 struct au1550_state *s = &au1550_state;
2080
2081 if (!s)
2082 return;
2083 synchronize_irq();
2084 au1xxx_dbdma_chan_free(s->dma_adc.dmanr);
2085 au1xxx_dbdma_chan_free(s->dma_dac.dmanr);
2086 release_mem_region(CPHYSADDR(AC97_PSC_SEL), 0x30);
2087 unregister_sound_dsp(s->dev_audio);
2088 unregister_sound_mixer(s->codec->dev_mixer);
2089 ac97_release_codec(s->codec);
2090 }
2091
2092 static int __init
2093 init_au1550(void)
2094 {
2095 return au1550_probe();
2096 }
2097
2098 static void __exit
2099 cleanup_au1550(void)
2100 {
2101 au1550_remove();
2102 }
2103
2104 module_init(init_au1550);
2105 module_exit(cleanup_au1550);
2106
2107 #ifndef MODULE
2108
2109 static int __init
2110 au1550_setup(char *options)
2111 {
2112 char *this_opt;
2113
2114 if (!options || !*options)
2115 return 0;
2116
2117 while ((this_opt = strsep(&options, ","))) {
2118 if (!*this_opt)
2119 continue;
2120 if (!strncmp(this_opt, "vra", 3)) {
2121 vra = 1;
2122 }
2123 }
2124
2125 return 1;
2126 }
2127
2128 __setup("au1550_audio=", au1550_setup);
2129
2130 #endif /* MODULE */
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