1 // SPDX-License-Identifier: GPL-2.0-or-later
2 /*
3 * kirkwood-i2s.c
4 *
5 * (c) 2010 Arnaud Patard <apatard@mandriva.com>
6 * (c) 2010 Arnaud Patard <arnaud.patard@rtp-net.org>
7 */
8
9 #include <linux/init.h>
10 #include <linux/module.h>
11 #include <linux/platform_device.h>
12 #include <linux/io.h>
13 #include <linux/slab.h>
14 #include <linux/mbus.h>
15 #include <linux/delay.h>
16 #include <linux/clk.h>
17 #include <sound/pcm.h>
18 #include <sound/pcm_params.h>
19 #include <sound/soc.h>
20 #include <linux/platform_data/asoc-kirkwood.h>
21 #include <linux/of.h>
22
23 #include "kirkwood.h"
24
25 #define KIRKWOOD_I2S_FORMATS \
26 (SNDRV_PCM_FMTBIT_S16_LE | \
27 SNDRV_PCM_FMTBIT_S24_LE | \
28 SNDRV_PCM_FMTBIT_S32_LE)
29
30 #define KIRKWOOD_SPDIF_FORMATS \
31 (SNDRV_PCM_FMTBIT_S16_LE | \
32 SNDRV_PCM_FMTBIT_S24_LE)
33
kirkwood_i2s_set_fmt(struct snd_soc_dai * cpu_dai,unsigned int fmt)34 static int kirkwood_i2s_set_fmt(struct snd_soc_dai *cpu_dai,
35 unsigned int fmt)
36 {
37 struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(cpu_dai);
38 unsigned long mask;
39 unsigned long value;
40
41 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
42 case SND_SOC_DAIFMT_RIGHT_J:
43 mask = KIRKWOOD_I2S_CTL_RJ;
44 break;
45 case SND_SOC_DAIFMT_LEFT_J:
46 mask = KIRKWOOD_I2S_CTL_LJ;
47 break;
48 case SND_SOC_DAIFMT_I2S:
49 mask = KIRKWOOD_I2S_CTL_I2S;
50 break;
51 default:
52 return -EINVAL;
53 }
54
55 /*
56 * Set same format for playback and record
57 * This avoids some troubles.
58 */
59 value = readl(priv->io+KIRKWOOD_I2S_PLAYCTL);
60 value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
61 value |= mask;
62 writel(value, priv->io+KIRKWOOD_I2S_PLAYCTL);
63
64 value = readl(priv->io+KIRKWOOD_I2S_RECCTL);
65 value &= ~KIRKWOOD_I2S_CTL_JUST_MASK;
66 value |= mask;
67 writel(value, priv->io+KIRKWOOD_I2S_RECCTL);
68
69 return 0;
70 }
71
kirkwood_set_dco(void __iomem * io,unsigned long rate)72 static inline void kirkwood_set_dco(void __iomem *io, unsigned long rate)
73 {
74 unsigned long value;
75
76 value = KIRKWOOD_DCO_CTL_OFFSET_0;
77 switch (rate) {
78 default:
79 case 44100:
80 value |= KIRKWOOD_DCO_CTL_FREQ_11;
81 break;
82 case 48000:
83 value |= KIRKWOOD_DCO_CTL_FREQ_12;
84 break;
85 case 96000:
86 value |= KIRKWOOD_DCO_CTL_FREQ_24;
87 break;
88 }
89 writel(value, io + KIRKWOOD_DCO_CTL);
90
91 /* wait for dco locked */
92 do {
93 cpu_relax();
94 value = readl(io + KIRKWOOD_DCO_SPCR_STATUS);
95 value &= KIRKWOOD_DCO_SPCR_STATUS_DCO_LOCK;
96 } while (value == 0);
97 }
98
kirkwood_set_rate(struct snd_soc_dai * dai,struct kirkwood_dma_data * priv,unsigned long rate)99 static void kirkwood_set_rate(struct snd_soc_dai *dai,
100 struct kirkwood_dma_data *priv, unsigned long rate)
101 {
102 uint32_t clks_ctrl;
103
104 if (IS_ERR(priv->extclk)) {
105 /* use internal dco for the supported rates
106 * defined in kirkwood_i2s_dai */
107 dev_dbg(dai->dev, "%s: dco set rate = %lu\n",
108 __func__, rate);
109 kirkwood_set_dco(priv->io, rate);
110
111 clks_ctrl = KIRKWOOD_MCLK_SOURCE_DCO;
112 } else {
113 /* use the external clock for the other rates
114 * defined in kirkwood_i2s_dai_extclk */
115 dev_dbg(dai->dev, "%s: extclk set rate = %lu -> %lu\n",
116 __func__, rate, 256 * rate);
117 clk_set_rate(priv->extclk, 256 * rate);
118
119 clks_ctrl = KIRKWOOD_MCLK_SOURCE_EXTCLK;
120 }
121 writel(clks_ctrl, priv->io + KIRKWOOD_CLOCKS_CTRL);
122 }
123
kirkwood_i2s_startup(struct snd_pcm_substream * substream,struct snd_soc_dai * dai)124 static int kirkwood_i2s_startup(struct snd_pcm_substream *substream,
125 struct snd_soc_dai *dai)
126 {
127 struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
128
129 snd_soc_dai_set_dma_data(dai, substream, priv);
130 return 0;
131 }
132
kirkwood_i2s_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params,struct snd_soc_dai * dai)133 static int kirkwood_i2s_hw_params(struct snd_pcm_substream *substream,
134 struct snd_pcm_hw_params *params,
135 struct snd_soc_dai *dai)
136 {
137 struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
138 uint32_t ctl_play, ctl_rec;
139 unsigned int i2s_reg;
140 unsigned long i2s_value;
141
142 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
143 i2s_reg = KIRKWOOD_I2S_PLAYCTL;
144 } else {
145 i2s_reg = KIRKWOOD_I2S_RECCTL;
146 }
147
148 kirkwood_set_rate(dai, priv, params_rate(params));
149
150 i2s_value = readl(priv->io+i2s_reg);
151 i2s_value &= ~KIRKWOOD_I2S_CTL_SIZE_MASK;
152
153 /*
154 * Size settings in play/rec i2s control regs and play/rec control
155 * regs must be the same.
156 */
157 switch (params_format(params)) {
158 case SNDRV_PCM_FORMAT_S16_LE:
159 i2s_value |= KIRKWOOD_I2S_CTL_SIZE_16;
160 ctl_play = KIRKWOOD_PLAYCTL_SIZE_16_C |
161 KIRKWOOD_PLAYCTL_I2S_EN |
162 KIRKWOOD_PLAYCTL_SPDIF_EN;
163 ctl_rec = KIRKWOOD_RECCTL_SIZE_16_C |
164 KIRKWOOD_RECCTL_I2S_EN |
165 KIRKWOOD_RECCTL_SPDIF_EN;
166 break;
167 /*
168 * doesn't work... S20_3LE != kirkwood 20bit format ?
169 *
170 case SNDRV_PCM_FORMAT_S20_3LE:
171 i2s_value |= KIRKWOOD_I2S_CTL_SIZE_20;
172 ctl_play = KIRKWOOD_PLAYCTL_SIZE_20 |
173 KIRKWOOD_PLAYCTL_I2S_EN;
174 ctl_rec = KIRKWOOD_RECCTL_SIZE_20 |
175 KIRKWOOD_RECCTL_I2S_EN;
176 break;
177 */
178 case SNDRV_PCM_FORMAT_S24_LE:
179 i2s_value |= KIRKWOOD_I2S_CTL_SIZE_24;
180 ctl_play = KIRKWOOD_PLAYCTL_SIZE_24 |
181 KIRKWOOD_PLAYCTL_I2S_EN |
182 KIRKWOOD_PLAYCTL_SPDIF_EN;
183 ctl_rec = KIRKWOOD_RECCTL_SIZE_24 |
184 KIRKWOOD_RECCTL_I2S_EN |
185 KIRKWOOD_RECCTL_SPDIF_EN;
186 break;
187 case SNDRV_PCM_FORMAT_S32_LE:
188 i2s_value |= KIRKWOOD_I2S_CTL_SIZE_32;
189 ctl_play = KIRKWOOD_PLAYCTL_SIZE_32 |
190 KIRKWOOD_PLAYCTL_I2S_EN;
191 ctl_rec = KIRKWOOD_RECCTL_SIZE_32 |
192 KIRKWOOD_RECCTL_I2S_EN;
193 break;
194 default:
195 return -EINVAL;
196 }
197
198 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
199 if (params_channels(params) == 1)
200 ctl_play |= KIRKWOOD_PLAYCTL_MONO_BOTH;
201 else
202 ctl_play |= KIRKWOOD_PLAYCTL_MONO_OFF;
203
204 priv->ctl_play &= ~(KIRKWOOD_PLAYCTL_MONO_MASK |
205 KIRKWOOD_PLAYCTL_ENABLE_MASK |
206 KIRKWOOD_PLAYCTL_SIZE_MASK);
207 priv->ctl_play |= ctl_play;
208 } else {
209 priv->ctl_rec &= ~(KIRKWOOD_RECCTL_ENABLE_MASK |
210 KIRKWOOD_RECCTL_SIZE_MASK);
211 priv->ctl_rec |= ctl_rec;
212 }
213
214 writel(i2s_value, priv->io+i2s_reg);
215
216 return 0;
217 }
218
kirkwood_i2s_play_mute(unsigned ctl)219 static unsigned kirkwood_i2s_play_mute(unsigned ctl)
220 {
221 if (!(ctl & KIRKWOOD_PLAYCTL_I2S_EN))
222 ctl |= KIRKWOOD_PLAYCTL_I2S_MUTE;
223 if (!(ctl & KIRKWOOD_PLAYCTL_SPDIF_EN))
224 ctl |= KIRKWOOD_PLAYCTL_SPDIF_MUTE;
225 return ctl;
226 }
227
kirkwood_i2s_play_trigger(struct snd_pcm_substream * substream,int cmd,struct snd_soc_dai * dai)228 static int kirkwood_i2s_play_trigger(struct snd_pcm_substream *substream,
229 int cmd, struct snd_soc_dai *dai)
230 {
231 struct snd_pcm_runtime *runtime = substream->runtime;
232 struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
233 uint32_t ctl, value;
234
235 ctl = readl(priv->io + KIRKWOOD_PLAYCTL);
236 if ((ctl & KIRKWOOD_PLAYCTL_ENABLE_MASK) == 0) {
237 unsigned timeout = 5000;
238 /*
239 * The Armada510 spec says that if we enter pause mode, the
240 * busy bit must be read back as clear _twice_. Make sure
241 * we respect that otherwise we get DMA underruns.
242 */
243 do {
244 value = ctl;
245 ctl = readl(priv->io + KIRKWOOD_PLAYCTL);
246 if (!((ctl | value) & KIRKWOOD_PLAYCTL_PLAY_BUSY))
247 break;
248 udelay(1);
249 } while (timeout--);
250
251 if ((ctl | value) & KIRKWOOD_PLAYCTL_PLAY_BUSY)
252 dev_notice(dai->dev, "timed out waiting for busy to deassert: %08x\n",
253 ctl);
254 }
255
256 switch (cmd) {
257 case SNDRV_PCM_TRIGGER_START:
258 /* configure */
259 ctl = priv->ctl_play;
260 if (dai->id == 0)
261 ctl &= ~KIRKWOOD_PLAYCTL_SPDIF_EN; /* i2s */
262 else
263 ctl &= ~KIRKWOOD_PLAYCTL_I2S_EN; /* spdif */
264 ctl = kirkwood_i2s_play_mute(ctl);
265 value = ctl & ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
266 writel(value, priv->io + KIRKWOOD_PLAYCTL);
267
268 /* enable interrupts */
269 if (!runtime->no_period_wakeup) {
270 value = readl(priv->io + KIRKWOOD_INT_MASK);
271 value |= KIRKWOOD_INT_CAUSE_PLAY_BYTES;
272 writel(value, priv->io + KIRKWOOD_INT_MASK);
273 }
274
275 /* enable playback */
276 writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
277 break;
278
279 case SNDRV_PCM_TRIGGER_STOP:
280 /* stop audio, disable interrupts */
281 ctl |= KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE |
282 KIRKWOOD_PLAYCTL_SPDIF_MUTE;
283 writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
284
285 value = readl(priv->io + KIRKWOOD_INT_MASK);
286 value &= ~KIRKWOOD_INT_CAUSE_PLAY_BYTES;
287 writel(value, priv->io + KIRKWOOD_INT_MASK);
288
289 /* disable all playbacks */
290 ctl &= ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
291 writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
292 break;
293
294 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
295 case SNDRV_PCM_TRIGGER_SUSPEND:
296 ctl |= KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE |
297 KIRKWOOD_PLAYCTL_SPDIF_MUTE;
298 writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
299 break;
300
301 case SNDRV_PCM_TRIGGER_RESUME:
302 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
303 ctl &= ~(KIRKWOOD_PLAYCTL_PAUSE | KIRKWOOD_PLAYCTL_I2S_MUTE |
304 KIRKWOOD_PLAYCTL_SPDIF_MUTE);
305 ctl = kirkwood_i2s_play_mute(ctl);
306 writel(ctl, priv->io + KIRKWOOD_PLAYCTL);
307 break;
308
309 default:
310 return -EINVAL;
311 }
312
313 return 0;
314 }
315
kirkwood_i2s_rec_trigger(struct snd_pcm_substream * substream,int cmd,struct snd_soc_dai * dai)316 static int kirkwood_i2s_rec_trigger(struct snd_pcm_substream *substream,
317 int cmd, struct snd_soc_dai *dai)
318 {
319 struct kirkwood_dma_data *priv = snd_soc_dai_get_drvdata(dai);
320 uint32_t ctl, value;
321
322 value = readl(priv->io + KIRKWOOD_RECCTL);
323
324 switch (cmd) {
325 case SNDRV_PCM_TRIGGER_START:
326 /* configure */
327 ctl = priv->ctl_rec;
328 if (dai->id == 0)
329 ctl &= ~KIRKWOOD_RECCTL_SPDIF_EN; /* i2s */
330 else
331 ctl &= ~KIRKWOOD_RECCTL_I2S_EN; /* spdif */
332
333 value = ctl & ~KIRKWOOD_RECCTL_ENABLE_MASK;
334 writel(value, priv->io + KIRKWOOD_RECCTL);
335
336 /* enable interrupts */
337 value = readl(priv->io + KIRKWOOD_INT_MASK);
338 value |= KIRKWOOD_INT_CAUSE_REC_BYTES;
339 writel(value, priv->io + KIRKWOOD_INT_MASK);
340
341 /* enable record */
342 writel(ctl, priv->io + KIRKWOOD_RECCTL);
343 break;
344
345 case SNDRV_PCM_TRIGGER_STOP:
346 /* stop audio, disable interrupts */
347 value = readl(priv->io + KIRKWOOD_RECCTL);
348 value |= KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE;
349 writel(value, priv->io + KIRKWOOD_RECCTL);
350
351 value = readl(priv->io + KIRKWOOD_INT_MASK);
352 value &= ~KIRKWOOD_INT_CAUSE_REC_BYTES;
353 writel(value, priv->io + KIRKWOOD_INT_MASK);
354
355 /* disable all records */
356 value = readl(priv->io + KIRKWOOD_RECCTL);
357 value &= ~KIRKWOOD_RECCTL_ENABLE_MASK;
358 writel(value, priv->io + KIRKWOOD_RECCTL);
359 break;
360
361 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
362 case SNDRV_PCM_TRIGGER_SUSPEND:
363 value = readl(priv->io + KIRKWOOD_RECCTL);
364 value |= KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE;
365 writel(value, priv->io + KIRKWOOD_RECCTL);
366 break;
367
368 case SNDRV_PCM_TRIGGER_RESUME:
369 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
370 value = readl(priv->io + KIRKWOOD_RECCTL);
371 value &= ~(KIRKWOOD_RECCTL_PAUSE | KIRKWOOD_RECCTL_MUTE);
372 writel(value, priv->io + KIRKWOOD_RECCTL);
373 break;
374
375 default:
376 return -EINVAL;
377 }
378
379 return 0;
380 }
381
kirkwood_i2s_trigger(struct snd_pcm_substream * substream,int cmd,struct snd_soc_dai * dai)382 static int kirkwood_i2s_trigger(struct snd_pcm_substream *substream, int cmd,
383 struct snd_soc_dai *dai)
384 {
385 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
386 return kirkwood_i2s_play_trigger(substream, cmd, dai);
387 else
388 return kirkwood_i2s_rec_trigger(substream, cmd, dai);
389
390 return 0;
391 }
392
kirkwood_i2s_init(struct kirkwood_dma_data * priv)393 static int kirkwood_i2s_init(struct kirkwood_dma_data *priv)
394 {
395 unsigned long value;
396 unsigned int reg_data;
397
398 /* put system in a "safe" state : */
399 /* disable audio interrupts */
400 writel(0xffffffff, priv->io + KIRKWOOD_INT_CAUSE);
401 writel(0, priv->io + KIRKWOOD_INT_MASK);
402
403 reg_data = readl(priv->io + 0x1200);
404 reg_data &= (~(0x333FF8));
405 reg_data |= 0x111D18;
406 writel(reg_data, priv->io + 0x1200);
407
408 msleep(500);
409
410 reg_data = readl(priv->io + 0x1200);
411 reg_data &= (~(0x333FF8));
412 reg_data |= 0x111D18;
413 writel(reg_data, priv->io + 0x1200);
414
415 /* disable playback/record */
416 value = readl(priv->io + KIRKWOOD_PLAYCTL);
417 value &= ~KIRKWOOD_PLAYCTL_ENABLE_MASK;
418 writel(value, priv->io + KIRKWOOD_PLAYCTL);
419
420 value = readl(priv->io + KIRKWOOD_RECCTL);
421 value &= ~KIRKWOOD_RECCTL_ENABLE_MASK;
422 writel(value, priv->io + KIRKWOOD_RECCTL);
423
424 return 0;
425
426 }
427
428 static const struct snd_soc_dai_ops kirkwood_i2s_dai_ops = {
429 .startup = kirkwood_i2s_startup,
430 .trigger = kirkwood_i2s_trigger,
431 .hw_params = kirkwood_i2s_hw_params,
432 .set_fmt = kirkwood_i2s_set_fmt,
433 };
434
435 static struct snd_soc_dai_driver kirkwood_i2s_dai[2] = {
436 {
437 .name = "i2s",
438 .id = 0,
439 .playback = {
440 .channels_min = 1,
441 .channels_max = 2,
442 .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
443 SNDRV_PCM_RATE_96000,
444 .formats = KIRKWOOD_I2S_FORMATS,
445 },
446 .capture = {
447 .channels_min = 1,
448 .channels_max = 2,
449 .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
450 SNDRV_PCM_RATE_96000,
451 .formats = KIRKWOOD_I2S_FORMATS,
452 },
453 .ops = &kirkwood_i2s_dai_ops,
454 },
455 {
456 .name = "spdif",
457 .id = 1,
458 .playback = {
459 .channels_min = 1,
460 .channels_max = 2,
461 .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
462 SNDRV_PCM_RATE_96000,
463 .formats = KIRKWOOD_SPDIF_FORMATS,
464 },
465 .capture = {
466 .channels_min = 1,
467 .channels_max = 2,
468 .rates = SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 |
469 SNDRV_PCM_RATE_96000,
470 .formats = KIRKWOOD_SPDIF_FORMATS,
471 },
472 .ops = &kirkwood_i2s_dai_ops,
473 },
474 };
475
476 static struct snd_soc_dai_driver kirkwood_i2s_dai_extclk[2] = {
477 {
478 .name = "i2s",
479 .id = 0,
480 .playback = {
481 .channels_min = 1,
482 .channels_max = 2,
483 .rates = SNDRV_PCM_RATE_CONTINUOUS,
484 .rate_min = 5512,
485 .rate_max = 192000,
486 .formats = KIRKWOOD_I2S_FORMATS,
487 },
488 .capture = {
489 .channels_min = 1,
490 .channels_max = 2,
491 .rates = SNDRV_PCM_RATE_CONTINUOUS,
492 .rate_min = 5512,
493 .rate_max = 192000,
494 .formats = KIRKWOOD_I2S_FORMATS,
495 },
496 .ops = &kirkwood_i2s_dai_ops,
497 },
498 {
499 .name = "spdif",
500 .id = 1,
501 .playback = {
502 .channels_min = 1,
503 .channels_max = 2,
504 .rates = SNDRV_PCM_RATE_CONTINUOUS,
505 .rate_min = 5512,
506 .rate_max = 192000,
507 .formats = KIRKWOOD_SPDIF_FORMATS,
508 },
509 .capture = {
510 .channels_min = 1,
511 .channels_max = 2,
512 .rates = SNDRV_PCM_RATE_CONTINUOUS,
513 .rate_min = 5512,
514 .rate_max = 192000,
515 .formats = KIRKWOOD_SPDIF_FORMATS,
516 },
517 .ops = &kirkwood_i2s_dai_ops,
518 },
519 };
520
kirkwood_i2s_dev_probe(struct platform_device * pdev)521 static int kirkwood_i2s_dev_probe(struct platform_device *pdev)
522 {
523 struct kirkwood_asoc_platform_data *data = pdev->dev.platform_data;
524 struct snd_soc_dai_driver *soc_dai = kirkwood_i2s_dai;
525 struct kirkwood_dma_data *priv;
526 struct device_node *np = pdev->dev.of_node;
527 int err;
528
529 priv = devm_kzalloc(&pdev->dev, sizeof(*priv), GFP_KERNEL);
530 if (!priv)
531 return -ENOMEM;
532
533 dev_set_drvdata(&pdev->dev, priv);
534
535 priv->io = devm_platform_ioremap_resource(pdev, 0);
536 if (IS_ERR(priv->io))
537 return PTR_ERR(priv->io);
538
539 priv->irq = platform_get_irq(pdev, 0);
540 if (priv->irq < 0)
541 return priv->irq;
542
543 if (np) {
544 priv->burst = 128; /* might be 32 or 128 */
545 } else if (data) {
546 priv->burst = data->burst;
547 } else {
548 dev_err(&pdev->dev, "no DT nor platform data ?!\n");
549 return -EINVAL;
550 }
551
552 priv->clk = devm_clk_get(&pdev->dev, np ? "internal" : NULL);
553 if (IS_ERR(priv->clk)) {
554 dev_err(&pdev->dev, "no clock\n");
555 return PTR_ERR(priv->clk);
556 }
557
558 priv->extclk = devm_clk_get(&pdev->dev, "extclk");
559 if (IS_ERR(priv->extclk)) {
560 if (PTR_ERR(priv->extclk) == -EPROBE_DEFER)
561 return -EPROBE_DEFER;
562 } else {
563 if (clk_is_match(priv->extclk, priv->clk)) {
564 devm_clk_put(&pdev->dev, priv->extclk);
565 priv->extclk = ERR_PTR(-EINVAL);
566 } else {
567 dev_info(&pdev->dev, "found external clock\n");
568 clk_prepare_enable(priv->extclk);
569 soc_dai = kirkwood_i2s_dai_extclk;
570 }
571 }
572
573 err = clk_prepare_enable(priv->clk);
574 if (err < 0)
575 return err;
576
577 /* Some sensible defaults - this reflects the powerup values */
578 priv->ctl_play = KIRKWOOD_PLAYCTL_SIZE_24;
579 priv->ctl_rec = KIRKWOOD_RECCTL_SIZE_24;
580
581 /* Select the burst size */
582 if (priv->burst == 32) {
583 priv->ctl_play |= KIRKWOOD_PLAYCTL_BURST_32;
584 priv->ctl_rec |= KIRKWOOD_RECCTL_BURST_32;
585 } else {
586 priv->ctl_play |= KIRKWOOD_PLAYCTL_BURST_128;
587 priv->ctl_rec |= KIRKWOOD_RECCTL_BURST_128;
588 }
589
590 err = snd_soc_register_component(&pdev->dev, &kirkwood_soc_component,
591 soc_dai, 2);
592 if (err) {
593 dev_err(&pdev->dev, "snd_soc_register_component failed\n");
594 goto err_component;
595 }
596
597 kirkwood_i2s_init(priv);
598
599 return 0;
600
601 err_component:
602 if (!IS_ERR(priv->extclk))
603 clk_disable_unprepare(priv->extclk);
604 clk_disable_unprepare(priv->clk);
605
606 return err;
607 }
608
kirkwood_i2s_dev_remove(struct platform_device * pdev)609 static int kirkwood_i2s_dev_remove(struct platform_device *pdev)
610 {
611 struct kirkwood_dma_data *priv = dev_get_drvdata(&pdev->dev);
612
613 snd_soc_unregister_component(&pdev->dev);
614 if (!IS_ERR(priv->extclk))
615 clk_disable_unprepare(priv->extclk);
616 clk_disable_unprepare(priv->clk);
617
618 return 0;
619 }
620
621 #ifdef CONFIG_OF
622 static const struct of_device_id mvebu_audio_of_match[] = {
623 { .compatible = "marvell,kirkwood-audio" },
624 { .compatible = "marvell,dove-audio" },
625 { .compatible = "marvell,armada370-audio" },
626 { }
627 };
628 MODULE_DEVICE_TABLE(of, mvebu_audio_of_match);
629 #endif
630
631 static struct platform_driver kirkwood_i2s_driver = {
632 .probe = kirkwood_i2s_dev_probe,
633 .remove = kirkwood_i2s_dev_remove,
634 .driver = {
635 .name = DRV_NAME,
636 .of_match_table = of_match_ptr(mvebu_audio_of_match),
637 },
638 };
639
640 module_platform_driver(kirkwood_i2s_driver);
641
642 /* Module information */
643 MODULE_AUTHOR("Arnaud Patard, <arnaud.patard@rtp-net.org>");
644 MODULE_DESCRIPTION("Kirkwood I2S SoC Interface");
645 MODULE_LICENSE("GPL");
646 MODULE_ALIAS("platform:mvebu-audio");
647
