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vmalloc: fix __GFP_HIGHMEM usage for vmalloc_32 on 32b systems
[linux/fpc-iii.git] / sound / soc / kirkwood / kirkwood-i2s.c
blob105a73cc5158519da5f62e256c4a72c1e5d40c49
1 /*
2 * kirkwood-i2s.c
3 *
4 * (c) 2010 Arnaud Patard <apatard@mandriva.com>
5 * (c) 2010 Arnaud Patard <arnaud.patard@rtp-net.org>
6 *
7 * This program is free software; you can redistribute it and/or modify it
8 * under the terms of the GNU General Public License as published by the
9 * Free Software Foundation; either version 2 of the License, or (at your
10 * option) any later version.
11 */
12
13 #include <linux/init.h>
14 #include <linux/module.h>
15 #include <linux/platform_device.h>
16 #include <linux/io.h>
17 #include <linux/slab.h>
18 #include <linux/mbus.h>
19 #include <linux/delay.h>
20 #include <linux/clk.h>
21 #include <sound/pcm.h>
22 #include <sound/pcm_params.h>
23 #include <sound/soc.h>
24 #include <linux/platform_data/asoc-kirkwood.h>
25 #include <linux/of.h>
26
27 #include "kirkwood.h"
28
29 #define DRV_NAME "mvebu-audio"
30
31 #define KIRKWOOD_I2S_FORMATS \
32 (SNDRV_PCM_FMTBIT_S16_LE | \
33 SNDRV_PCM_FMTBIT_S24_LE | \
34 SNDRV_PCM_FMTBIT_S32_LE)
35
36 #define KIRKWOOD_SPDIF_FORMATS \
37 (SNDRV_PCM_FMTBIT_S16_LE | \
38 SNDRV_PCM_FMTBIT_S24_LE)
39
40 static int kirkwood_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
41 unsigned int fmt)
42 {
43 struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(cpu_dai);
44 unsigned long mask;
45 unsigned long value;
46
47 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
48 case SND_SOC_DAIFMT_RIGHT_J:
49 mask = KIRKWOOD_I2S_CTL_RJ;
50 break;
51 case SND_SOC_DAIFMT_LEFT_J:
52 mask = KIRKWOOD_I2S_CTL_LJ;
53 break;
54 case SND_SOC_DAIFMT_I2S:
55 mask = KIRKWOOD_I2S_CTL_I2S;
56 break;
57 default:
58 return -EINVAL;
59 }
60
61 /*
62 * Set same format for playback and record
63 * This avoids some troubles.
64 */
65 value = readl(priv->io+KIRKWOOD_I2S_PLAYCTL);
66 value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
67 value |= mask;
68 writel(value, priv->io+KIRKWOOD_I2S_PLAYCTL);
69
70 value = readl(priv->io+KIRKWOOD_I2S_RECCTL);
71 value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
72 value |= mask;
73 writel(value, priv->io+KIRKWOOD_I2S_RECCTL);
74
75 return 0;
76 }
77
78 static inline void kirkwood_set_dco(void __iomem *io, unsigned long rate)
79 {
80 unsigned long value;
81
82 value = KIRKWOOD_DCO_CTL_OFFSET_0;
83 switch (rate) {
84 default:
85 case 44100:
86 value |= KIRKWOOD_DCO_CTL_FREQ_11;
87 break;
88 case 48000:
89 value |= KIRKWOOD_DCO_CTL_FREQ_12;
90 break;
91 case 96000:
92 value |= KIRKWOOD_DCO_CTL_FREQ_24;
93 break;
94 }
95 writel(value, io + KIRKWOOD_DCO_CTL);
96
97 /* wait for dco locked */
98 do {
99 cpu_relax();
100 value = readl(io + KIRKWOOD_DCO_SPCR_STATUS);
101 value &= KIRKWOOD_DCO_SPCR_STATUS_DCO_LOCK;
102 } while (value == 0);
103 }
104
105 static void kirkwood_set_rate(struct snd_soc_dai *dai,
106 struct kirkwood_dma_data *priv, unsigned long rate)
107 {
108 uint32_t clks_ctrl;
109
110 if (IS_ERR(priv->extclk)) {
111 /* use internal dco for the supported rates
112 * defined in kirkwood_i2s_dai */
113 dev_dbg(dai->dev, "%s: dco set rate = %lu\n",
114 __func__, rate);
115 kirkwood_set_dco(priv->io, rate);
116
117 clks_ctrl = KIRKWOOD_MCLK_SOURCE_DCO;
118 } else {
119 /* use the external clock for the other rates
120 * defined in kirkwood_i2s_dai_extclk */
121 dev_dbg(dai->dev, "%s: extclk set rate = %lu -> %lu\n",
122 __func__, rate, 256 * rate);
123 clk_set_rate(priv->extclk, 256 * rate);
124
125 clks_ctrl = KIRKWOOD_MCLK_SOURCE_EXTCLK;
126 }
127 writel(clks_ctrl, priv->io + KIRKWOOD_CLOCKS_CTRL);
128 }
129
130 static int kirkwood_i2s_startup(struct snd_pcm_substream *substream,
131 struct snd_soc_dai *dai)
132 {
133 struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
134
135 snd_soc_dai_set_dma_data(dai, substream, priv);
136 return 0;
137 }
138
139 static int kirkwood_i2s_hw_params(struct snd_pcm_substream *substream,
140 struct snd_pcm_hw_params *params,
141 struct snd_soc_dai *dai)
142 {
143 struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
144 uint32_t ctl_play, ctl_rec;
145 unsigned int i2s_reg;
146 unsigned long i2s_value;
147
148 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
149 i2s_reg = KIRKWOOD_I2S_PLAYCTL;
150 } else {
151 i2s_reg = KIRKWOOD_I2S_RECCTL;
152 }
153
154 kirkwood_set_rate(dai, priv, params_rate(params));
155
156 i2s_value = readl(priv->io+i2s_reg);
157 i2s_value &= ~KIRKWOOD_I2S_CTL_SIZE_MASK;
158
159 /*
160 * Size settings in play/rec i2s control regs and play/rec control
161 * regs must be the same.
162 */
163 switch (params_format(params)) {
164 case SNDRV_PCM_FORMAT_S16_LE:
165 i2s_value |= KIRKWOOD_I2S_CTL_SIZE_16;
166 ctl_play = KIRKWOOD_PLAYCTL_SIZE_16_C |
167 KIRKWOOD_PLAYCTL_I2S_EN |
168 KIRKWOOD_PLAYCTL_SPDIF_EN;
169 ctl_rec = KIRKWOOD_RECCTL_SIZE_16_C |
170 KIRKWOOD_RECCTL_I2S_EN |
171 KIRKWOOD_RECCTL_SPDIF_EN;
172 break;
173 /*
174 * doesn't work... S20_3LE != kirkwood 20bit format ?
175 *
176 case SNDRV_PCM_FORMAT_S20_3LE:
177 i2s_value |= KIRKWOOD_I2S_CTL_SIZE_20;
178 ctl_play = KIRKWOOD_PLAYCTL_SIZE_20 |
179 KIRKWOOD_PLAYCTL_I2S_EN;
180 ctl_rec = KIRKWOOD_RECCTL_SIZE_20 |
181 KIRKWOOD_RECCTL_I2S_EN;
182 break;
183 */
184 case SNDRV_PCM_FORMAT_S24_LE:
185 i2s_value |= KIRKWOOD_I2S_CTL_SIZE_24;
186 ctl_play = KIRKWOOD_PLAYCTL_SIZE_24 |
187 KIRKWOOD_PLAYCTL_I2S_EN |
188 KIRKWOOD_PLAYCTL_SPDIF_EN;
189 ctl_rec = KIRKWOOD_RECCTL_SIZE_24 |
190 KIRKWOOD_RECCTL_I2S_EN |
191 KIRKWOOD_RECCTL_SPDIF_EN;
192 break;
193 case SNDRV_PCM_FORMAT_S32_LE:
194 i2s_value |= KIRKWOOD_I2S_CTL_SIZE_32;
195 ctl_play = KIRKWOOD_PLAYCTL_SIZE_32 |
196 KIRKWOOD_PLAYCTL_I2S_EN;
197 ctl_rec = KIRKWOOD_RECCTL_SIZE_32 |
198 KIRKWOOD_RECCTL_I2S_EN;
199 break;
200 default:
201 return -EINVAL;
202 }
203
204 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
205 if (params_channels(params) == 1)
206 ctl_play |= KIRKWOOD_PLAYCTL_MONO_BOTH;
207 else
208 ctl_play |= KIRKWOOD_PLAYCTL_MONO_OFF;
209
210 priv->ctl_play &= ~(KIRKWOOD_PLAYCTL_MONO_MASK |
211 KIRKWOOD_PLAYCTL_ENABLE_MASK |
212 KIRKWOOD_PLAYCTL_SIZE_MASK);
213 priv->ctl_play |= ctl_play;
214 } else {
215 priv->ctl_rec &= ~(KIRKWOOD_RECCTL_ENABLE_MASK |
216 KIRKWOOD_RECCTL_SIZE_MASK);
217 priv->ctl_rec |= ctl_rec;
218 }
219
220 writel(i2s_value, priv->io+i2s_reg);
221
222 return 0;
223 }
224
225 static unsigned kirkwood_i2s_play_mute(unsigned ctl)
226 {
227 if (!(ctl & KIRKWOOD_PLAYCTL_I2S_EN))
228 ctl |= KIRKWOOD_PLAYCTL_I2S_MUTE;
229 if (!(ctl & KIRKWOOD_PLAYCTL_SPDIF_EN))
230 ctl |= KIRKWOOD_PLAYCTL_SPDIF_MUTE;
231 return ctl;
232 }
233
234 static int kirkwood_i2s_play_trigger(struct snd_pcm_substream *substream,
235 int cmd, struct snd_soc_dai *dai)
236 {
237 struct snd_pcm_runtime *runtime = substream->runtime;
238 struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
239 uint32_t ctl, value;
240
241 ctl = readl(priv->io + KIRKWOOD_PLAYCTL);
242 if ((ctl & KIRKWOOD_PLAYCTL_ENABLE_MASK) == 0) {
243 unsigned timeout = 5000;
244 /*
245 * The Armada510 spec says that if we enter pause mode, the
246 * busy bit must be read back as clear _twice_. Make sure
247 * we respect that otherwise we get DMA underruns.
248 */
249 do {
250 value = ctl;
251 ctl = readl(priv->io + KIRKWOOD_PLAYCTL);
252 if (!((ctl | value) & KIRKWOOD_PLAYCTL_PLAY_BUSY))
253 break;
254 udelay(1);
255 } while (timeout--);
256
257 if ((ctl | value) & KIRKWOOD_PLAYCTL_PLAY_BUSY)
258 dev_notice(dai->dev, "timed out waiting for busy to deassert: %08x\n",
259 ctl);
260 }
261
262 switch (cmd) {
263 case SNDRV_PCM_TRIGGER_START:
264 /* configure */
265 ctl = priv->ctl_play;
266 if (dai->id == 0)
267 ctl &= ~KIRKWOOD_PLAYCTL_SPDIF_EN; /* i2s */
268 else
269 ctl &= ~KIRKWOOD_PLAYCTL_I2S_EN; /* spdif */
270 ctl = kirkwood_i2s_play_mute(ctl);
271 value = ctl & ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
272 writel(value, priv->io + KIRKWOOD_PLAYCTL);
273
274 /* enable interrupts */
275 if (!runtime->no_period_wakeup) {
276 value = readl(priv->io + KIRKWOOD_INT_MASK);
277 value |= KIRKWOOD_INT_CAUSE_PLAY_BYTES;
278 writel(value, priv->io + KIRKWOOD_INT_MASK);
279 }
280
281 /* enable playback */
282 writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
283 break;
284
285 case SNDRV_PCM_TRIGGER_STOP:
286 /* stop audio, disable interrupts */
287 ctl |= KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE |
288 KIRKWOOD_PLAYCTL_SPDIF_MUTE;
289 writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
290
291 value = readl(priv->io + KIRKWOOD_INT_MASK);
292 value &= ~KIRKWOOD_INT_CAUSE_PLAY_BYTES;
293 writel(value, priv->io + KIRKWOOD_INT_MASK);
294
295 /* disable all playbacks */
296 ctl &= ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
297 writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
298 break;
299
300 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
301 case SNDRV_PCM_TRIGGER_SUSPEND:
302 ctl |= KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE |
303 KIRKWOOD_PLAYCTL_SPDIF_MUTE;
304 writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
305 break;
306
307 case SNDRV_PCM_TRIGGER_RESUME:
308 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
309 ctl &= ~(KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE |
310 KIRKWOOD_PLAYCTL_SPDIF_MUTE);
311 ctl = kirkwood_i2s_play_mute(ctl);
312 writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
313 break;
314
315 default:
316 return -EINVAL;
317 }
318
319 return 0;
320 }
321
322 static int kirkwood_i2s_rec_trigger(struct snd_pcm_substream *substream,
323 int cmd, struct snd_soc_dai *dai)
324 {
325 struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
326 uint32_t ctl, value;
327
328 value = readl(priv->io + KIRKWOOD_RECCTL);
329
330 switch (cmd) {
331 case SNDRV_PCM_TRIGGER_START:
332 /* configure */
333 ctl = priv->ctl_rec;
334 if (dai->id == 0)
335 ctl &= ~KIRKWOOD_RECCTL_SPDIF_EN; /* i2s */
336 else
337 ctl &= ~KIRKWOOD_RECCTL_I2S_EN; /* spdif */
338
339 value = ctl & ~KIRKWOOD_RECCTL_ENABLE_MASK;
340 writel(value, priv->io + KIRKWOOD_RECCTL);
341
342 /* enable interrupts */
343 value = readl(priv->io + KIRKWOOD_INT_MASK);
344 value |= KIRKWOOD_INT_CAUSE_REC_BYTES;
345 writel(value, priv->io + KIRKWOOD_INT_MASK);
346
347 /* enable record */
348 writel(ctl, priv->io + KIRKWOOD_RECCTL);
349 break;
350
351 case SNDRV_PCM_TRIGGER_STOP:
352 /* stop audio, disable interrupts */
353 value = readl(priv->io + KIRKWOOD_RECCTL);
354 value |= KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE;
355 writel(value, priv->io + KIRKWOOD_RECCTL);
356
357 value = readl(priv->io + KIRKWOOD_INT_MASK);
358 value &= ~KIRKWOOD_INT_CAUSE_REC_BYTES;
359 writel(value, priv->io + KIRKWOOD_INT_MASK);
360
361 /* disable all records */
362 value = readl(priv->io + KIRKWOOD_RECCTL);
363 value &= ~KIRKWOOD_RECCTL_ENABLE_MASK;
364 writel(value, priv->io + KIRKWOOD_RECCTL);
365 break;
366
367 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
368 case SNDRV_PCM_TRIGGER_SUSPEND:
369 value = readl(priv->io + KIRKWOOD_RECCTL);
370 value |= KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE;
371 writel(value, priv->io + KIRKWOOD_RECCTL);
372 break;
373
374 case SNDRV_PCM_TRIGGER_RESUME:
375 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
376 value = readl(priv->io + KIRKWOOD_RECCTL);
377 value &= ~(KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE);
378 writel(value, priv->io + KIRKWOOD_RECCTL);
379 break;
380
381 default:
382 return -EINVAL;
383 }
384
385 return 0;
386 }
387
388 static int kirkwood_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
389 struct snd_soc_dai *dai)
390 {
391 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
392 return kirkwood_i2s_play_trigger(substream, cmd, dai);
393 else
394 return kirkwood_i2s_rec_trigger(substream, cmd, dai);
395
396 return 0;
397 }
398
399 static int kirkwood_i2s_init(struct kirkwood_dma_data *priv)
400 {
401 unsigned long value;
402 unsigned int reg_data;
403
404 /* put system in a "safe" state : */
405 /* disable audio interrupts */
406 writel(0xffffffff, priv->io + KIRKWOOD_INT_CAUSE);
407 writel(0, priv->io + KIRKWOOD_INT_MASK);
408
409 reg_data = readl(priv->io + 0x1200);
410 reg_data &= (~(0x333FF8));
411 reg_data |= 0x111D18;
412 writel(reg_data, priv->io + 0x1200);
413
414 msleep(500);
415
416 reg_data = readl(priv->io + 0x1200);
417 reg_data &= (~(0x333FF8));
418 reg_data |= 0x111D18;
419 writel(reg_data, priv->io + 0x1200);
420
421 /* disable playback/record */
422 value = readl(priv->io + KIRKWOOD_PLAYCTL);
423 value &= ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
424 writel(value, priv->io + KIRKWOOD_PLAYCTL);
425
426 value = readl(priv->io + KIRKWOOD_RECCTL);
427 value &= ~KIRKWOOD_RECCTL_ENABLE_MASK;
428 writel(value, priv->io + KIRKWOOD_RECCTL);
429
430 return 0;
431
432 }
433
434 static const struct snd_soc_dai_ops kirkwood_i2s_dai_ops = {
435 .startup = kirkwood_i2s_startup,
436 .trigger = kirkwood_i2s_trigger,
437 .hw_params = kirkwood_i2s_hw_params,
438 .set_fmt = kirkwood_i2s_set_fmt,
439 };
440
441 static struct snd_soc_dai_driver kirkwood_i2s_dai[2] = {
442 {
443 .name = "i2s",
444 .id = 0,
445 .playback = {
446 .channels_min = 1,
447 .channels_max = 2,
448 .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
449 SNDRV_PCM_RATE_96000,
450 .formats = KIRKWOOD_I2S_FORMATS,
451 },
452 .capture = {
453 .channels_min = 1,
454 .channels_max = 2,
455 .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
456 SNDRV_PCM_RATE_96000,
457 .formats = KIRKWOOD_I2S_FORMATS,
458 },
459 .ops = &kirkwood_i2s_dai_ops,
460 },
461 {
462 .name = "spdif",
463 .id = 1,
464 .playback = {
465 .channels_min = 1,
466 .channels_max = 2,
467 .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
468 SNDRV_PCM_RATE_96000,
469 .formats = KIRKWOOD_SPDIF_FORMATS,
470 },
471 .capture = {
472 .channels_min = 1,
473 .channels_max = 2,
474 .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
475 SNDRV_PCM_RATE_96000,
476 .formats = KIRKWOOD_SPDIF_FORMATS,
477 },
478 .ops = &kirkwood_i2s_dai_ops,
479 },
480 };
481
482 static struct snd_soc_dai_driver kirkwood_i2s_dai_extclk[2] = {
483 {
484 .name = "i2s",
485 .id = 0,
486 .playback = {
487 .channels_min = 1,
488 .channels_max = 2,
489 .rates = SNDRV_PCM_RATE_CONTINUOUS,
490 .rate_min = 5512,
491 .rate_max = 192000,
492 .formats = KIRKWOOD_I2S_FORMATS,
493 },
494 .capture = {
495 .channels_min = 1,
496 .channels_max = 2,
497 .rates = SNDRV_PCM_RATE_CONTINUOUS,
498 .rate_min = 5512,
499 .rate_max = 192000,
500 .formats = KIRKWOOD_I2S_FORMATS,
501 },
502 .ops = &kirkwood_i2s_dai_ops,
503 },
504 {
505 .name = "spdif",
506 .id = 1,
507 .playback = {
508 .channels_min = 1,
509 .channels_max = 2,
510 .rates = SNDRV_PCM_RATE_CONTINUOUS,
511 .rate_min = 5512,
512 .rate_max = 192000,
513 .formats = KIRKWOOD_SPDIF_FORMATS,
514 },
515 .capture = {
516 .channels_min = 1,
517 .channels_max = 2,
518 .rates = SNDRV_PCM_RATE_CONTINUOUS,
519 .rate_min = 5512,
520 .rate_max = 192000,
521 .formats = KIRKWOOD_SPDIF_FORMATS,
522 },
523 .ops = &kirkwood_i2s_dai_ops,
524 },
525 };
526
527 static const struct snd_soc_component_driver kirkwood_i2s_component = {
528 .name = DRV_NAME,
529 };
530
531 static int kirkwood_i2s_dev_probe(struct platform_device *pdev)
532 {
533 struct kirkwood_asoc_platform_data *data = pdev->dev.platform_data;
534 struct snd_soc_dai_driver *soc_dai = kirkwood_i2s_dai;
535 struct kirkwood_dma_data *priv;
536 struct resource *mem;
537 struct device_node *np = pdev->dev.of_node;
538 int err;
539
540 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
541 if (!priv)
542 return -ENOMEM;
543
544 dev_set_drvdata(&pdev->dev, priv);
545
546 mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
547 priv->io = devm_ioremap_resource(&pdev->dev, mem);
548 if (IS_ERR(priv->io))
549 return PTR_ERR(priv->io);
550
551 priv->irq = platform_get_irq(pdev, 0);
552 if (priv->irq < 0) {
553 dev_err(&pdev->dev, "platform_get_irq failed: %d\n", priv->irq);
554 return priv->irq;
555 }
556
557 if (np) {
558 priv->burst = 128; /* might be 32 or 128 */
559 } else if (data) {
560 priv->burst = data->burst;
561 } else {
562 dev_err(&pdev->dev, "no DT nor platform data ?!\n");
563 return -EINVAL;
564 }
565
566 priv->clk = devm_clk_get(&pdev->dev, np ? "internal" : NULL);
567 if (IS_ERR(priv->clk)) {
568 dev_err(&pdev->dev, "no clock\n");
569 return PTR_ERR(priv->clk);
570 }
571
572 err = clk_prepare_enable(priv->clk);
573 if (err < 0)
574 return err;
575
576 priv->extclk = devm_clk_get(&pdev->dev, "extclk");
577 if (IS_ERR(priv->extclk)) {
578 if (PTR_ERR(priv->extclk) == -EPROBE_DEFER)
579 return -EPROBE_DEFER;
580 } else {
581 if (clk_is_match(priv->extclk, priv->clk)) {
582 devm_clk_put(&pdev->dev, priv->extclk);
583 priv->extclk = ERR_PTR(-EINVAL);
584 } else {
585 dev_info(&pdev->dev, "found external clock\n");
586 clk_prepare_enable(priv->extclk);
587 soc_dai = kirkwood_i2s_dai_extclk;
588 }
589 }
590
591 /* Some sensible defaults - this reflects the powerup values */
592 priv->ctl_play = KIRKWOOD_PLAYCTL_SIZE_24;
593 priv->ctl_rec = KIRKWOOD_RECCTL_SIZE_24;
594
595 /* Select the burst size */
596 if (priv->burst == 32) {
597 priv->ctl_play |= KIRKWOOD_PLAYCTL_BURST_32;
598 priv->ctl_rec |= KIRKWOOD_RECCTL_BURST_32;
599 } else {
600 priv->ctl_play |= KIRKWOOD_PLAYCTL_BURST_128;
601 priv->ctl_rec |= KIRKWOOD_RECCTL_BURST_128;
602 }
603
604 err = snd_soc_register_component(&pdev->dev, &kirkwood_i2s_component,
605 soc_dai, 2);
606 if (err) {
607 dev_err(&pdev->dev, "snd_soc_register_component failed\n");
608 goto err_component;
609 }
610
611 err = snd_soc_register_platform(&pdev->dev, &kirkwood_soc_platform);
612 if (err) {
613 dev_err(&pdev->dev, "snd_soc_register_platform failed\n");
614 goto err_platform;
615 }
616
617 kirkwood_i2s_init(priv);
618
619 return 0;
620 err_platform:
621 snd_soc_unregister_component(&pdev->dev);
622 err_component:
623 if (!IS_ERR(priv->extclk))
624 clk_disable_unprepare(priv->extclk);
625 clk_disable_unprepare(priv->clk);
626
627 return err;
628 }
629
630 static int kirkwood_i2s_dev_remove(struct platform_device *pdev)
631 {
632 struct kirkwood_dma_data *priv = dev_get_drvdata(&pdev->dev);
633
634 snd_soc_unregister_platform(&pdev->dev);
635 snd_soc_unregister_component(&pdev->dev);
636
637 if (!IS_ERR(priv->extclk))
638 clk_disable_unprepare(priv->extclk);
639 clk_disable_unprepare(priv->clk);
640
641 return 0;
642 }
643
644 #ifdef CONFIG_OF
645 static const struct of_device_id mvebu_audio_of_match[] = {
646 { .compatible = "marvell,kirkwood-audio" },
647 { .compatible = "marvell,dove-audio" },
648 { .compatible = "marvell,armada370-audio" },
649 { }
650 };
651 MODULE_DEVICE_TABLE(of, mvebu_audio_of_match);
652 #endif
653
654 static struct platform_driver kirkwood_i2s_driver = {
655 .probe = kirkwood_i2s_dev_probe,
656 .remove = kirkwood_i2s_dev_remove,
657 .driver = {
658 .name = DRV_NAME,
659 .of_match_table = of_match_ptr(mvebu_audio_of_match),
660 },
661 };
662
663 module_platform_driver(kirkwood_i2s_driver);
664
665 /* Module information */
666 MODULE_AUTHOR("Arnaud Patard, <arnaud.patard@rtp-net.org>");
667 MODULE_DESCRIPTION("Kirkwood I2S SoC Interface");
668 MODULE_LICENSE("GPL");
669 MODULE_ALIAS("platform:mvebu-audio");
Linux with added FPC-III support