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-rw-r--r--sound/arm/aaci.c968
1 files changed, 968 insertions, 0 deletions
diff --git a/sound/arm/aaci.c b/sound/arm/aaci.c
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1/*
2 * linux/sound/arm/aaci.c - ARM PrimeCell AACI PL041 driver
3 *
4 * Copyright (C) 2003 Deep Blue Solutions Ltd, All Rights Reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify
7 * it under the terms of the GNU General Public License version 2 as
8 * published by the Free Software Foundation.
9 *
10 * Documentation: ARM DDI 0173B
11 */
12#include <linux/module.h>
13#include <linux/delay.h>
14#include <linux/init.h>
15#include <linux/ioport.h>
16#include <linux/device.h>
17#include <linux/spinlock.h>
18#include <linux/interrupt.h>
19#include <linux/err.h>
20
21#include <asm/io.h>
22#include <asm/irq.h>
23#include <asm/hardware/amba.h>
24
25#include <sound/driver.h>
26#include <sound/core.h>
27#include <sound/initval.h>
28#include <sound/ac97_codec.h>
29#include <sound/pcm.h>
30#include <sound/pcm_params.h>
31
32#include "aaci.h"
33#include "devdma.h"
34
35#define DRIVER_NAME "aaci-pl041"
36
37/*
38 * PM support is not complete. Turn it off.
39 */
40#undef CONFIG_PM
41
42static void aaci_ac97_select_codec(struct aaci *aaci, ac97_t *ac97)
43{
44 u32 v, maincr = aaci->maincr | MAINCR_SCRA(ac97->num);
45
46 /*
47 * Ensure that the slot 1/2 RX registers are empty.
48 */
49 v = readl(aaci->base + AACI_SLFR);
50 if (v & SLFR_2RXV)
51 readl(aaci->base + AACI_SL2RX);
52 if (v & SLFR_1RXV)
53 readl(aaci->base + AACI_SL1RX);
54
55 writel(maincr, aaci->base + AACI_MAINCR);
56}
57
58/*
59 * P29:
60 * The recommended use of programming the external codec through slot 1
61 * and slot 2 data is to use the channels during setup routines and the
62 * slot register at any other time. The data written into slot 1, slot 2
63 * and slot 12 registers is transmitted only when their corresponding
64 * SI1TxEn, SI2TxEn and SI12TxEn bits are set in the AACI_MAINCR
65 * register.
66 */
67static void aaci_ac97_write(ac97_t *ac97, unsigned short reg, unsigned short val)
68{
69 struct aaci *aaci = ac97->private_data;
70 u32 v;
71
72 if (ac97->num >= 4)
73 return;
74
75 down(&aaci->ac97_sem);
76
77 aaci_ac97_select_codec(aaci, ac97);
78
79 /*
80 * P54: You must ensure that AACI_SL2TX is always written
81 * to, if required, before data is written to AACI_SL1TX.
82 */
83 writel(val << 4, aaci->base + AACI_SL2TX);
84 writel(reg << 12, aaci->base + AACI_SL1TX);
85
86 /*
87 * Wait for the transmission of both slots to complete.
88 */
89 do {
90 v = readl(aaci->base + AACI_SLFR);
91 } while (v & (SLFR_1TXB|SLFR_2TXB));
92
93 up(&aaci->ac97_sem);
94}
95
96/*
97 * Read an AC'97 register.
98 */
99static unsigned short aaci_ac97_read(ac97_t *ac97, unsigned short reg)
100{
101 struct aaci *aaci = ac97->private_data;
102 u32 v;
103
104 if (ac97->num >= 4)
105 return ~0;
106
107 down(&aaci->ac97_sem);
108
109 aaci_ac97_select_codec(aaci, ac97);
110
111 /*
112 * Write the register address to slot 1.
113 */
114 writel((reg << 12) | (1 << 19), aaci->base + AACI_SL1TX);
115
116 /*
117 * Wait for the transmission to complete.
118 */
119 do {
120 v = readl(aaci->base + AACI_SLFR);
121 } while (v & SLFR_1TXB);
122
123 /*
124 * Give the AC'97 codec more than enough time
125 * to respond. (42us = ~2 frames at 48kHz.)
126 */
127 udelay(42);
128
129 /*
130 * Wait for slot 2 to indicate data.
131 */
132 do {
133 cond_resched();
134 v = readl(aaci->base + AACI_SLFR) & (SLFR_1RXV|SLFR_2RXV);
135 } while (v != (SLFR_1RXV|SLFR_2RXV));
136
137 v = readl(aaci->base + AACI_SL1RX) >> 12;
138 if (v == reg) {
139 v = readl(aaci->base + AACI_SL2RX) >> 4;
140 } else {
141 dev_err(&aaci->dev->dev,
142 "wrong ac97 register read back (%x != %x)\n",
143 v, reg);
144 v = ~0;
145 }
146
147 up(&aaci->ac97_sem);
148 return v;
149}
150
151static inline void aaci_chan_wait_ready(struct aaci_runtime *aacirun)
152{
153 u32 val;
154 int timeout = 5000;
155
156 do {
157 val = readl(aacirun->base + AACI_SR);
158 } while (val & (SR_TXB|SR_RXB) && timeout--);
159}
160
161
162
163/*
164 * Interrupt support.
165 */
166static void aaci_fifo_irq(struct aaci *aaci, u32 mask)
167{
168 if (mask & ISR_URINTR) {
169 writel(ICLR_TXUEC1, aaci->base + AACI_INTCLR);
170 }
171
172 if (mask & ISR_TXINTR) {
173 struct aaci_runtime *aacirun = &aaci->playback;
174 void *ptr;
175
176 if (!aacirun->substream || !aacirun->start) {
177 dev_warn(&aaci->dev->dev, "TX interrupt???");
178 writel(0, aacirun->base + AACI_IE);
179 return;
180 }
181
182 ptr = aacirun->ptr;
183 do {
184 unsigned int len = aacirun->fifosz;
185 u32 val;
186
187 if (aacirun->bytes <= 0) {
188 aacirun->bytes += aacirun->period;
189 aacirun->ptr = ptr;
190 spin_unlock(&aaci->lock);
191 snd_pcm_period_elapsed(aacirun->substream);
192 spin_lock(&aaci->lock);
193 }
194 if (!(aacirun->cr & TXCR_TXEN))
195 break;
196
197 val = readl(aacirun->base + AACI_SR);
198 if (!(val & SR_TXHE))
199 break;
200 if (!(val & SR_TXFE))
201 len >>= 1;
202
203 aacirun->bytes -= len;
204
205 /* writing 16 bytes at a time */
206 for ( ; len > 0; len -= 16) {
207 asm(
208 "ldmia %0!, {r0, r1, r2, r3}\n\t"
209 "stmia %1, {r0, r1, r2, r3}"
210 : "+r" (ptr)
211 : "r" (aacirun->fifo)
212 : "r0", "r1", "r2", "r3", "cc");
213
214 if (ptr >= aacirun->end)
215 ptr = aacirun->start;
216 }
217 } while (1);
218
219 aacirun->ptr = ptr;
220 }
221}
222
223static irqreturn_t aaci_irq(int irq, void *devid, struct pt_regs *regs)
224{
225 struct aaci *aaci = devid;
226 u32 mask;
227 int i;
228
229 spin_lock(&aaci->lock);
230 mask = readl(aaci->base + AACI_ALLINTS);
231 if (mask) {
232 u32 m = mask;
233 for (i = 0; i < 4; i++, m >>= 7) {
234 if (m & 0x7f) {
235 aaci_fifo_irq(aaci, m);
236 }
237 }
238 }
239 spin_unlock(&aaci->lock);
240
241 return mask ? IRQ_HANDLED : IRQ_NONE;
242}
243
244
245
246/*
247 * ALSA support.
248 */
249
250struct aaci_stream {
251 unsigned char codec_idx;
252 unsigned char rate_idx;
253};
254
255static struct aaci_stream aaci_streams[] = {
256 [ACSTREAM_FRONT] = {
257 .codec_idx = 0,
258 .rate_idx = AC97_RATES_FRONT_DAC,
259 },
260 [ACSTREAM_SURROUND] = {
261 .codec_idx = 0,
262 .rate_idx = AC97_RATES_SURR_DAC,
263 },
264 [ACSTREAM_LFE] = {
265 .codec_idx = 0,
266 .rate_idx = AC97_RATES_LFE_DAC,
267 },
268};
269
270static inline unsigned int aaci_rate_mask(struct aaci *aaci, int streamid)
271{
272 struct aaci_stream *s = aaci_streams + streamid;
273 return aaci->ac97_bus->codec[s->codec_idx]->rates[s->rate_idx];
274}
275
276static unsigned int rate_list[] = {
277 5512, 8000, 11025, 16000, 22050, 32000, 44100,
278 48000, 64000, 88200, 96000, 176400, 192000
279};
280
281/*
282 * Double-rate rule: we can support double rate iff channels == 2
283 * (unimplemented)
284 */
285static int
286aaci_rule_rate_by_channels(snd_pcm_hw_params_t *p, snd_pcm_hw_rule_t *rule)
287{
288 struct aaci *aaci = rule->private;
289 unsigned int rate_mask = SNDRV_PCM_RATE_8000_48000|SNDRV_PCM_RATE_5512;
290 snd_interval_t *c = hw_param_interval(p, SNDRV_PCM_HW_PARAM_CHANNELS);
291
292 switch (c->max) {
293 case 6:
294 rate_mask &= aaci_rate_mask(aaci, ACSTREAM_LFE);
295 case 4:
296 rate_mask &= aaci_rate_mask(aaci, ACSTREAM_SURROUND);
297 case 2:
298 rate_mask &= aaci_rate_mask(aaci, ACSTREAM_FRONT);
299 }
300
301 return snd_interval_list(hw_param_interval(p, rule->var),
302 ARRAY_SIZE(rate_list), rate_list,
303 rate_mask);
304}
305
306static snd_pcm_hardware_t aaci_hw_info = {
307 .info = SNDRV_PCM_INFO_MMAP |
308 SNDRV_PCM_INFO_MMAP_VALID |
309 SNDRV_PCM_INFO_INTERLEAVED |
310 SNDRV_PCM_INFO_BLOCK_TRANSFER |
311 SNDRV_PCM_INFO_RESUME,
312
313 /*
314 * ALSA doesn't support 18-bit or 20-bit packed into 32-bit
315 * words. It also doesn't support 12-bit at all.
316 */
317 .formats = SNDRV_PCM_FMTBIT_S16_LE,
318
319 /* should this be continuous or knot? */
320 .rates = SNDRV_PCM_RATE_CONTINUOUS,
321 .rate_max = 48000,
322 .rate_min = 4000,
323 .channels_min = 2,
324 .channels_max = 6,
325 .buffer_bytes_max = 64 * 1024,
326 .period_bytes_min = 256,
327 .period_bytes_max = PAGE_SIZE,
328 .periods_min = 4,
329 .periods_max = PAGE_SIZE / 16,
330};
331
332static int aaci_pcm_open(struct aaci *aaci, snd_pcm_substream_t *substream,
333 struct aaci_runtime *aacirun)
334{
335 snd_pcm_runtime_t *runtime = substream->runtime;
336 int ret;
337
338 aacirun->substream = substream;
339 runtime->private_data = aacirun;
340 runtime->hw = aaci_hw_info;
341
342 /*
343 * FIXME: ALSA specifies fifo_size in bytes. If we're in normal
344 * mode, each 32-bit word contains one sample. If we're in
345 * compact mode, each 32-bit word contains two samples, effectively
346 * halving the FIFO size. However, we don't know for sure which
347 * we'll be using at this point. We set this to the lower limit.
348 */
349 runtime->hw.fifo_size = aaci->fifosize * 2;
350
351 /*
352 * Add rule describing hardware rate dependency
353 * on the number of channels.
354 */
355 ret = snd_pcm_hw_rule_add(runtime, 0, SNDRV_PCM_HW_PARAM_RATE,
356 aaci_rule_rate_by_channels, aaci,
357 SNDRV_PCM_HW_PARAM_CHANNELS,
358 SNDRV_PCM_HW_PARAM_RATE, -1);
359 if (ret)
360 goto out;
361
362 ret = request_irq(aaci->dev->irq[0], aaci_irq, SA_SHIRQ|SA_INTERRUPT,
363 DRIVER_NAME, aaci);
364 if (ret)
365 goto out;
366
367 return 0;
368
369 out:
370 return ret;
371}
372
373
374/*
375 * Common ALSA stuff
376 */
377static int aaci_pcm_close(snd_pcm_substream_t *substream)
378{
379 struct aaci *aaci = substream->private_data;
380 struct aaci_runtime *aacirun = substream->runtime->private_data;
381
382 WARN_ON(aacirun->cr & TXCR_TXEN);
383
384 aacirun->substream = NULL;
385 free_irq(aaci->dev->irq[0], aaci);
386
387 return 0;
388}
389
390static int aaci_pcm_hw_free(snd_pcm_substream_t *substream)
391{
392 struct aaci_runtime *aacirun = substream->runtime->private_data;
393
394 /*
395 * This must not be called with the device enabled.
396 */
397 WARN_ON(aacirun->cr & TXCR_TXEN);
398
399 if (aacirun->pcm_open)
400 snd_ac97_pcm_close(aacirun->pcm);
401 aacirun->pcm_open = 0;
402
403 /*
404 * Clear out the DMA and any allocated buffers.
405 */
406 devdma_hw_free(NULL, substream);
407
408 return 0;
409}
410
411static int aaci_pcm_hw_params(snd_pcm_substream_t *substream,
412 struct aaci_runtime *aacirun,
413 snd_pcm_hw_params_t *params)
414{
415 int err;
416
417 aaci_pcm_hw_free(substream);
418
419 err = devdma_hw_alloc(NULL, substream,
420 params_buffer_bytes(params));
421 if (err < 0)
422 goto out;
423
424 err = snd_ac97_pcm_open(aacirun->pcm, params_rate(params),
425 params_channels(params),
426 aacirun->pcm->r[0].slots);
427 if (err)
428 goto out;
429
430 aacirun->pcm_open = 1;
431
432 out:
433 return err;
434}
435
436static int aaci_pcm_prepare(snd_pcm_substream_t *substream)
437{
438 snd_pcm_runtime_t *runtime = substream->runtime;
439 struct aaci_runtime *aacirun = runtime->private_data;
440
441 aacirun->start = (void *)runtime->dma_area;
442 aacirun->end = aacirun->start + runtime->dma_bytes;
443 aacirun->ptr = aacirun->start;
444 aacirun->period =
445 aacirun->bytes = frames_to_bytes(runtime, runtime->period_size);
446
447 return 0;
448}
449
450static snd_pcm_uframes_t aaci_pcm_pointer(snd_pcm_substream_t *substream)
451{
452 snd_pcm_runtime_t *runtime = substream->runtime;
453 struct aaci_runtime *aacirun = runtime->private_data;
454 ssize_t bytes = aacirun->ptr - aacirun->start;
455
456 return bytes_to_frames(runtime, bytes);
457}
458
459static int aaci_pcm_mmap(snd_pcm_substream_t *substream, struct vm_area_struct *vma)
460{
461 return devdma_mmap(NULL, substream, vma);
462}
463
464
465/*
466 * Playback specific ALSA stuff
467 */
468static const u32 channels_to_txmask[] = {
469 [2] = TXCR_TX3 | TXCR_TX4,
470 [4] = TXCR_TX3 | TXCR_TX4 | TXCR_TX7 | TXCR_TX8,
471 [6] = TXCR_TX3 | TXCR_TX4 | TXCR_TX7 | TXCR_TX8 | TXCR_TX6 | TXCR_TX9,
472};
473
474/*
475 * We can support two and four channel audio. Unfortunately
476 * six channel audio requires a non-standard channel ordering:
477 * 2 -> FL(3), FR(4)
478 * 4 -> FL(3), FR(4), SL(7), SR(8)
479 * 6 -> FL(3), FR(4), SL(7), SR(8), C(6), LFE(9) (required)
480 * FL(3), FR(4), C(6), SL(7), SR(8), LFE(9) (actual)
481 * This requires an ALSA configuration file to correct.
482 */
483static unsigned int channel_list[] = { 2, 4, 6 };
484
485static int
486aaci_rule_channels(snd_pcm_hw_params_t *p, snd_pcm_hw_rule_t *rule)
487{
488 struct aaci *aaci = rule->private;
489 unsigned int chan_mask = 1 << 0, slots;
490
491 /*
492 * pcms[0] is the our 5.1 PCM instance.
493 */
494 slots = aaci->ac97_bus->pcms[0].r[0].slots;
495 if (slots & (1 << AC97_SLOT_PCM_SLEFT)) {
496 chan_mask |= 1 << 1;
497 if (slots & (1 << AC97_SLOT_LFE))
498 chan_mask |= 1 << 2;
499 }
500
501 return snd_interval_list(hw_param_interval(p, rule->var),
502 ARRAY_SIZE(channel_list), channel_list,
503 chan_mask);
504}
505
506static int aaci_pcm_playback_open(snd_pcm_substream_t *substream)
507{
508 struct aaci *aaci = substream->private_data;
509 int ret;
510
511 /*
512 * Add rule describing channel dependency.
513 */
514 ret = snd_pcm_hw_rule_add(substream->runtime, 0,
515 SNDRV_PCM_HW_PARAM_CHANNELS,
516 aaci_rule_channels, aaci,
517 SNDRV_PCM_HW_PARAM_CHANNELS, -1);
518 if (ret)
519 return ret;
520
521 return aaci_pcm_open(aaci, substream, &aaci->playback);
522}
523
524static int aaci_pcm_playback_hw_params(snd_pcm_substream_t *substream,
525 snd_pcm_hw_params_t *params)
526{
527 struct aaci *aaci = substream->private_data;
528 struct aaci_runtime *aacirun = substream->runtime->private_data;
529 unsigned int channels = params_channels(params);
530 int ret;
531
532 WARN_ON(channels >= ARRAY_SIZE(channels_to_txmask) ||
533 !channels_to_txmask[channels]);
534
535 ret = aaci_pcm_hw_params(substream, aacirun, params);
536
537 /*
538 * Enable FIFO, compact mode, 16 bits per sample.
539 * FIXME: double rate slots?
540 */
541 if (ret >= 0) {
542 aacirun->cr = TXCR_FEN | TXCR_COMPACT | TXCR_TSZ16;
543 aacirun->cr |= channels_to_txmask[channels];
544
545 aacirun->fifosz = aaci->fifosize * 4;
546 if (aacirun->cr & TXCR_COMPACT)
547 aacirun->fifosz >>= 1;
548 }
549 return ret;
550}
551
552static void aaci_pcm_playback_stop(struct aaci_runtime *aacirun)
553{
554 u32 ie;
555
556 ie = readl(aacirun->base + AACI_IE);
557 ie &= ~(IE_URIE|IE_TXIE);
558 writel(ie, aacirun->base + AACI_IE);
559 aacirun->cr &= ~TXCR_TXEN;
560 aaci_chan_wait_ready(aacirun);
561 writel(aacirun->cr, aacirun->base + AACI_TXCR);
562}
563
564static void aaci_pcm_playback_start(struct aaci_runtime *aacirun)
565{
566 u32 ie;
567
568 aaci_chan_wait_ready(aacirun);
569 aacirun->cr |= TXCR_TXEN;
570
571 ie = readl(aacirun->base + AACI_IE);
572 ie |= IE_URIE | IE_TXIE;
573 writel(ie, aacirun->base + AACI_IE);
574 writel(aacirun->cr, aacirun->base + AACI_TXCR);
575}
576
577static int aaci_pcm_playback_trigger(snd_pcm_substream_t *substream, int cmd)
578{
579 struct aaci *aaci = substream->private_data;
580 struct aaci_runtime *aacirun = substream->runtime->private_data;
581 unsigned long flags;
582 int ret = 0;
583
584 spin_lock_irqsave(&aaci->lock, flags);
585 switch (cmd) {
586 case SNDRV_PCM_TRIGGER_START:
587 aaci_pcm_playback_start(aacirun);
588 break;
589
590 case SNDRV_PCM_TRIGGER_RESUME:
591 aaci_pcm_playback_start(aacirun);
592 break;
593
594 case SNDRV_PCM_TRIGGER_STOP:
595 aaci_pcm_playback_stop(aacirun);
596 break;
597
598 case SNDRV_PCM_TRIGGER_SUSPEND:
599 aaci_pcm_playback_stop(aacirun);
600 break;
601
602 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
603 break;
604
605 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
606 break;
607
608 default:
609 ret = -EINVAL;
610 }
611 spin_unlock_irqrestore(&aaci->lock, flags);
612
613 return ret;
614}
615
616static snd_pcm_ops_t aaci_playback_ops = {
617 .open = aaci_pcm_playback_open,
618 .close = aaci_pcm_close,
619 .ioctl = snd_pcm_lib_ioctl,
620 .hw_params = aaci_pcm_playback_hw_params,
621 .hw_free = aaci_pcm_hw_free,
622 .prepare = aaci_pcm_prepare,
623 .trigger = aaci_pcm_playback_trigger,
624 .pointer = aaci_pcm_pointer,
625 .mmap = aaci_pcm_mmap,
626};
627
628
629
630/*
631 * Power Management.
632 */
633#ifdef CONFIG_PM
634static int aaci_do_suspend(snd_card_t *card, unsigned int state)
635{
636 struct aaci *aaci = card->private_data;
637 if (aaci->card->power_state != SNDRV_CTL_POWER_D3cold) {
638 snd_pcm_suspend_all(aaci->pcm);
639 snd_power_change_state(aaci->card, SNDRV_CTL_POWER_D3cold);
640 }
641 return 0;
642}
643
644static int aaci_do_resume(snd_card_t *card, unsigned int state)
645{
646 struct aaci *aaci = card->private_data;
647 if (aaci->card->power_state != SNDRV_CTL_POWER_D0) {
648 snd_power_change_state(aaci->card, SNDRV_CTL_POWER_D0);
649 }
650 return 0;
651}
652
653static int aaci_suspend(struct amba_device *dev, u32 state)
654{
655 snd_card_t *card = amba_get_drvdata(dev);
656 return card ? aaci_do_suspend(card) : 0;
657}
658
659static int aaci_resume(struct amba_device *dev)
660{
661 snd_card_t *card = amba_get_drvdata(dev);
662 return card ? aaci_do_resume(card) : 0;
663}
664#else
665#define aaci_do_suspend NULL
666#define aaci_do_resume NULL
667#define aaci_suspend NULL
668#define aaci_resume NULL
669#endif
670
671
672static struct ac97_pcm ac97_defs[] __devinitdata = {
673 [0] = { /* Front PCM */
674 .exclusive = 1,
675 .r = {
676 [0] = {
677 .slots = (1 << AC97_SLOT_PCM_LEFT) |
678 (1 << AC97_SLOT_PCM_RIGHT) |
679 (1 << AC97_SLOT_PCM_CENTER) |
680 (1 << AC97_SLOT_PCM_SLEFT) |
681 (1 << AC97_SLOT_PCM_SRIGHT) |
682 (1 << AC97_SLOT_LFE),
683 },
684 },
685 },
686 [1] = { /* PCM in */
687 .stream = 1,
688 .exclusive = 1,
689 .r = {
690 [0] = {
691 .slots = (1 << AC97_SLOT_PCM_LEFT) |
692 (1 << AC97_SLOT_PCM_RIGHT),
693 },
694 },
695 },
696 [2] = { /* Mic in */
697 .stream = 1,
698 .exclusive = 1,
699 .r = {
700 [0] = {
701 .slots = (1 << AC97_SLOT_MIC),
702 },
703 },
704 }
705};
706
707static ac97_bus_ops_t aaci_bus_ops = {
708 .write = aaci_ac97_write,
709 .read = aaci_ac97_read,
710};
711
712static int __devinit aaci_probe_ac97(struct aaci *aaci)
713{
714 ac97_template_t ac97_template;
715 ac97_bus_t *ac97_bus;
716 ac97_t *ac97;
717 int ret;
718
719 /*
720 * Assert AACIRESET for 2us
721 */
722 writel(0, aaci->base + AACI_RESET);
723 udelay(2);
724 writel(RESET_NRST, aaci->base + AACI_RESET);
725
726 /*
727 * Give the AC'97 codec more than enough time
728 * to wake up. (42us = ~2 frames at 48kHz.)
729 */
730 udelay(42);
731
732 ret = snd_ac97_bus(aaci->card, 0, &aaci_bus_ops, aaci, &ac97_bus);
733 if (ret)
734 goto out;
735
736 ac97_bus->clock = 48000;
737 aaci->ac97_bus = ac97_bus;
738
739 memset(&ac97_template, 0, sizeof(ac97_template_t));
740 ac97_template.private_data = aaci;
741 ac97_template.num = 0;
742 ac97_template.scaps = AC97_SCAP_SKIP_MODEM;
743
744 ret = snd_ac97_mixer(ac97_bus, &ac97_template, &ac97);
745 if (ret)
746 goto out;
747
748 /*
749 * Disable AC97 PC Beep input on audio codecs.
750 */
751 if (ac97_is_audio(ac97))
752 snd_ac97_write_cache(ac97, AC97_PC_BEEP, 0x801e);
753
754 ret = snd_ac97_pcm_assign(ac97_bus, ARRAY_SIZE(ac97_defs), ac97_defs);
755 if (ret)
756 goto out;
757
758 aaci->playback.pcm = &ac97_bus->pcms[0];
759
760 out:
761 return ret;
762}
763
764static void aaci_free_card(snd_card_t *card)
765{
766 struct aaci *aaci = card->private_data;
767 if (aaci->base)
768 iounmap(aaci->base);
769}
770
771static struct aaci * __devinit aaci_init_card(struct amba_device *dev)
772{
773 struct aaci *aaci;
774 snd_card_t *card;
775
776 card = snd_card_new(SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
777 THIS_MODULE, sizeof(struct aaci));
778 if (card == NULL)
779 return ERR_PTR(-ENOMEM);
780
781 card->private_free = aaci_free_card;
782 snd_card_set_pm_callback(card, aaci_do_suspend, aaci_do_resume, NULL);
783
784 strlcpy(card->driver, DRIVER_NAME, sizeof(card->driver));
785 strlcpy(card->shortname, "ARM AC'97 Interface", sizeof(card->shortname));
786 snprintf(card->longname, sizeof(card->longname),
787 "%s at 0x%08lx, irq %d",
788 card->shortname, dev->res.start, dev->irq[0]);
789
790 aaci = card->private_data;
791 init_MUTEX(&aaci->ac97_sem);
792 spin_lock_init(&aaci->lock);
793 aaci->card = card;
794 aaci->dev = dev;
795
796 /* Set MAINCR to allow slot 1 and 2 data IO */
797 aaci->maincr = MAINCR_IE | MAINCR_SL1RXEN | MAINCR_SL1TXEN |
798 MAINCR_SL2RXEN | MAINCR_SL2TXEN;
799
800 return aaci;
801}
802
803static int __devinit aaci_init_pcm(struct aaci *aaci)
804{
805 snd_pcm_t *pcm;
806 int ret;
807
808 ret = snd_pcm_new(aaci->card, "AACI AC'97", 0, 1, 0, &pcm);
809 if (ret == 0) {
810 aaci->pcm = pcm;
811 pcm->private_data = aaci;
812 pcm->info_flags = 0;
813
814 strlcpy(pcm->name, DRIVER_NAME, sizeof(pcm->name));
815
816 snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &aaci_playback_ops);
817 }
818
819 return ret;
820}
821
822static unsigned int __devinit aaci_size_fifo(struct aaci *aaci)
823{
824 void *base = aaci->base + AACI_CSCH1;
825 int i;
826
827 writel(TXCR_FEN | TXCR_TSZ16 | TXCR_TXEN, base + AACI_TXCR);
828
829 for (i = 0; !(readl(base + AACI_SR) & SR_TXFF) && i < 4096; i++)
830 writel(0, aaci->base + AACI_DR1);
831
832 writel(0, base + AACI_TXCR);
833
834 /*
835 * Re-initialise the AACI after the FIFO depth test, to
836 * ensure that the FIFOs are empty. Unfortunately, merely
837 * disabling the channel doesn't clear the FIFO.
838 */
839 writel(aaci->maincr & ~MAINCR_IE, aaci->base + AACI_MAINCR);
840 writel(aaci->maincr, aaci->base + AACI_MAINCR);
841
842 /*
843 * If we hit 4096, we failed. Go back to the specified
844 * fifo depth.
845 */
846 if (i == 4096)
847 i = 8;
848
849 return i;
850}
851
852static int __devinit aaci_probe(struct amba_device *dev, void *id)
853{
854 struct aaci *aaci;
855 int ret, i;
856
857 ret = amba_request_regions(dev, NULL);
858 if (ret)
859 return ret;
860
861 aaci = aaci_init_card(dev);
862 if (IS_ERR(aaci)) {
863 ret = PTR_ERR(aaci);
864 goto out;
865 }
866
867 aaci->base = ioremap(dev->res.start, SZ_4K);
868 if (!aaci->base) {
869 ret = -ENOMEM;
870 goto out;
871 }
872
873 /*
874 * Playback uses AACI channel 0
875 */
876 aaci->playback.base = aaci->base + AACI_CSCH1;
877 aaci->playback.fifo = aaci->base + AACI_DR1;
878
879 for (i = 0; i < 4; i++) {
880 void *base = aaci->base + i * 0x14;
881
882 writel(0, base + AACI_IE);
883 writel(0, base + AACI_TXCR);
884 writel(0, base + AACI_RXCR);
885 }
886
887 writel(0x1fff, aaci->base + AACI_INTCLR);
888 writel(aaci->maincr, aaci->base + AACI_MAINCR);
889
890 /*
891 * Size the FIFOs.
892 */
893 aaci->fifosize = aaci_size_fifo(aaci);
894
895 ret = aaci_probe_ac97(aaci);
896 if (ret)
897 goto out;
898
899 ret = aaci_init_pcm(aaci);
900 if (ret)
901 goto out;
902
903 ret = snd_card_register(aaci->card);
904 if (ret == 0) {
905 dev_info(&dev->dev, "%s, fifo %d\n", aaci->card->longname,
906 aaci->fifosize);
907 amba_set_drvdata(dev, aaci->card);
908 return ret;
909 }
910
911 out:
912 if (aaci)
913 snd_card_free(aaci->card);
914 amba_release_regions(dev);
915 return ret;
916}
917
918static int __devexit aaci_remove(struct amba_device *dev)
919{
920 snd_card_t *card = amba_get_drvdata(dev);
921
922 amba_set_drvdata(dev, NULL);
923
924 if (card) {
925 struct aaci *aaci = card->private_data;
926 writel(0, aaci->base + AACI_MAINCR);
927
928 snd_card_free(card);
929 amba_release_regions(dev);
930 }
931
932 return 0;
933}
934
935static struct amba_id aaci_ids[] = {
936 {
937 .id = 0x00041041,
938 .mask = 0x000fffff,
939 },
940 { 0, 0 },
941};
942
943static struct amba_driver aaci_driver = {
944 .drv = {
945 .name = DRIVER_NAME,
946 },
947 .probe = aaci_probe,
948 .remove = __devexit_p(aaci_remove),
949 .suspend = aaci_suspend,
950 .resume = aaci_resume,
951 .id_table = aaci_ids,
952};
953
954static int __init aaci_init(void)
955{
956 return amba_driver_register(&aaci_driver);
957}
958
959static void __exit aaci_exit(void)
960{
961 amba_driver_unregister(&aaci_driver);
962}
963
964module_init(aaci_init);
965module_exit(aaci_exit);
966
967MODULE_LICENSE("GPL");
968MODULE_DESCRIPTION("ARM PrimeCell PL041 Advanced Audio CODEC Interface driver");
generated by cgit v1.2.2 (git 2.25.0) at 2024-12-01 19:51:22 -0500