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12#include <linux/of.h>
13#include <linux/clk.h>
14#include <linux/module.h>
15#include <linux/platform_device.h>
16#include <linux/regmap.h>
17#include <sound/core.h>
18#include <sound/dmaengine_pcm.h>
19#include <sound/pcm_params.h>
20#include <sound/tlv.h>
21#include "atmel-classd.h"
22
23struct atmel_classd_pdata {
24 bool non_overlap_enable;
25 int non_overlap_time;
26 int pwm_type;
27 const char *card_name;
28};
29
30struct atmel_classd {
31 dma_addr_t phy_base;
32 struct regmap *regmap;
33 struct clk *pclk;
34 struct clk *gclk;
35 struct device *dev;
36 int irq;
37 const struct atmel_classd_pdata *pdata;
38};
39
40#ifdef CONFIG_OF
41static const struct of_device_id atmel_classd_of_match[] = {
42 {
43 .compatible = "atmel,sama5d2-classd",
44 }, {
45
46 }
47};
48MODULE_DEVICE_TABLE(of, atmel_classd_of_match);
49
50static struct atmel_classd_pdata *atmel_classd_dt_init(struct device *dev)
51{
52 struct device_node *np = dev->of_node;
53 struct atmel_classd_pdata *pdata;
54 const char *pwm_type;
55 int ret;
56
57 if (!np) {
58 dev_err(dev, "device node not found\n");
59 return ERR_PTR(-EINVAL);
60 }
61
62 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
63 if (!pdata)
64 return ERR_PTR(-ENOMEM);
65
66 ret = of_property_read_string(np, "atmel,pwm-type", &pwm_type);
67 if ((ret == 0) && (strcmp(pwm_type, "diff") == 0))
68 pdata->pwm_type = CLASSD_MR_PWMTYP_DIFF;
69 else
70 pdata->pwm_type = CLASSD_MR_PWMTYP_SINGLE;
71
72 ret = of_property_read_u32(np,
73 "atmel,non-overlap-time", &pdata->non_overlap_time);
74 if (ret)
75 pdata->non_overlap_enable = false;
76 else
77 pdata->non_overlap_enable = true;
78
79 ret = of_property_read_string(np, "atmel,model", &pdata->card_name);
80 if (ret)
81 pdata->card_name = "CLASSD";
82
83 return pdata;
84}
85#else
86static inline struct atmel_classd_pdata *
87atmel_classd_dt_init(struct device *dev)
88{
89 return ERR_PTR(-EINVAL);
90}
91#endif
92
93#define ATMEL_CLASSD_RATES (SNDRV_PCM_RATE_8000 \
94 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 \
95 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 \
96 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 \
97 | SNDRV_PCM_RATE_96000)
98
99static const struct snd_pcm_hardware atmel_classd_hw = {
100 .info = SNDRV_PCM_INFO_MMAP
101 | SNDRV_PCM_INFO_MMAP_VALID
102 | SNDRV_PCM_INFO_INTERLEAVED
103 | SNDRV_PCM_INFO_RESUME
104 | SNDRV_PCM_INFO_PAUSE,
105 .formats = (SNDRV_PCM_FMTBIT_S16_LE),
106 .rates = ATMEL_CLASSD_RATES,
107 .rate_min = 8000,
108 .rate_max = 96000,
109 .channels_min = 1,
110 .channels_max = 2,
111 .buffer_bytes_max = 64 * 1024,
112 .period_bytes_min = 256,
113 .period_bytes_max = 32 * 1024,
114 .periods_min = 2,
115 .periods_max = 256,
116};
117
118#define ATMEL_CLASSD_PREALLOC_BUF_SIZE (64 * 1024)
119
120
121static int atmel_classd_cpu_dai_startup(struct snd_pcm_substream *substream,
122 struct snd_soc_dai *cpu_dai)
123{
124 struct snd_soc_pcm_runtime *rtd = substream->private_data;
125 struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
126
127 regmap_write(dd->regmap, CLASSD_THR, 0x0);
128
129 return clk_prepare_enable(dd->pclk);
130}
131
132static void atmel_classd_cpu_dai_shutdown(struct snd_pcm_substream *substream,
133 struct snd_soc_dai *cpu_dai)
134{
135 struct snd_soc_pcm_runtime *rtd = substream->private_data;
136 struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
137
138 clk_disable_unprepare(dd->pclk);
139}
140
141static const struct snd_soc_dai_ops atmel_classd_cpu_dai_ops = {
142 .startup = atmel_classd_cpu_dai_startup,
143 .shutdown = atmel_classd_cpu_dai_shutdown,
144};
145
146static struct snd_soc_dai_driver atmel_classd_cpu_dai = {
147 .playback = {
148 .channels_min = 1,
149 .channels_max = 2,
150 .rates = ATMEL_CLASSD_RATES,
151 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
152 .ops = &atmel_classd_cpu_dai_ops,
153};
154
155static const struct snd_soc_component_driver atmel_classd_cpu_dai_component = {
156 .name = "atmel-classd",
157};
158
159
160static int
161atmel_classd_platform_configure_dma(struct snd_pcm_substream *substream,
162 struct snd_pcm_hw_params *params,
163 struct dma_slave_config *slave_config)
164{
165 struct snd_soc_pcm_runtime *rtd = substream->private_data;
166 struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
167
168 if (params_physical_width(params) != 16) {
169 dev_err(dd->dev,
170 "only supports 16-bit audio data\n");
171 return -EINVAL;
172 }
173
174 if (params_channels(params) == 1)
175 slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
176 else
177 slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
178
179 slave_config->direction = DMA_MEM_TO_DEV;
180 slave_config->dst_addr = dd->phy_base + CLASSD_THR;
181 slave_config->dst_maxburst = 1;
182 slave_config->src_maxburst = 1;
183 slave_config->device_fc = false;
184
185 return 0;
186}
187
188static const struct snd_dmaengine_pcm_config
189atmel_classd_dmaengine_pcm_config = {
190 .prepare_slave_config = atmel_classd_platform_configure_dma,
191 .pcm_hardware = &atmel_classd_hw,
192 .prealloc_buffer_size = ATMEL_CLASSD_PREALLOC_BUF_SIZE,
193};
194
195
196static const char * const mono_mode_text[] = {
197 "mix", "sat", "left", "right"
198};
199
200static SOC_ENUM_SINGLE_DECL(classd_mono_mode_enum,
201 CLASSD_INTPMR, CLASSD_INTPMR_MONO_MODE_SHIFT,
202 mono_mode_text);
203
204static const char * const eqcfg_text[] = {
205 "Treble-12dB", "Treble-6dB",
206 "Medium-8dB", "Medium-3dB",
207 "Bass-12dB", "Bass-6dB",
208 "0 dB",
209 "Bass+6dB", "Bass+12dB",
210 "Medium+3dB", "Medium+8dB",
211 "Treble+6dB", "Treble+12dB",
212};
213
214static const unsigned int eqcfg_value[] = {
215 CLASSD_INTPMR_EQCFG_T_CUT_12, CLASSD_INTPMR_EQCFG_T_CUT_6,
216 CLASSD_INTPMR_EQCFG_M_CUT_8, CLASSD_INTPMR_EQCFG_M_CUT_3,
217 CLASSD_INTPMR_EQCFG_B_CUT_12, CLASSD_INTPMR_EQCFG_B_CUT_6,
218 CLASSD_INTPMR_EQCFG_FLAT,
219 CLASSD_INTPMR_EQCFG_B_BOOST_6, CLASSD_INTPMR_EQCFG_B_BOOST_12,
220 CLASSD_INTPMR_EQCFG_M_BOOST_3, CLASSD_INTPMR_EQCFG_M_BOOST_8,
221 CLASSD_INTPMR_EQCFG_T_BOOST_6, CLASSD_INTPMR_EQCFG_T_BOOST_12,
222};
223
224static SOC_VALUE_ENUM_SINGLE_DECL(classd_eqcfg_enum,
225 CLASSD_INTPMR, CLASSD_INTPMR_EQCFG_SHIFT, 0xf,
226 eqcfg_text, eqcfg_value);
227
228static const DECLARE_TLV_DB_SCALE(classd_digital_tlv, -7800, 100, 1);
229
230static const struct snd_kcontrol_new atmel_classd_snd_controls[] = {
231SOC_DOUBLE_TLV("Playback Volume", CLASSD_INTPMR,
232 CLASSD_INTPMR_ATTL_SHIFT, CLASSD_INTPMR_ATTR_SHIFT,
233 78, 1, classd_digital_tlv),
234
235SOC_SINGLE("Deemphasis Switch", CLASSD_INTPMR,
236 CLASSD_INTPMR_DEEMP_SHIFT, 1, 0),
237
238SOC_SINGLE("Mono Switch", CLASSD_INTPMR, CLASSD_INTPMR_MONO_SHIFT, 1, 0),
239
240SOC_SINGLE("Swap Switch", CLASSD_INTPMR, CLASSD_INTPMR_SWAP_SHIFT, 1, 0),
241
242SOC_ENUM("Mono Mode", classd_mono_mode_enum),
243
244SOC_ENUM("EQ", classd_eqcfg_enum),
245};
246
247static const char * const pwm_type[] = {
248 "Single ended", "Differential"
249};
250
251static int atmel_classd_component_probe(struct snd_soc_component *component)
252{
253 struct snd_soc_card *card = snd_soc_component_get_drvdata(component);
254 struct atmel_classd *dd = snd_soc_card_get_drvdata(card);
255 const struct atmel_classd_pdata *pdata = dd->pdata;
256 u32 mask, val;
257
258 mask = CLASSD_MR_PWMTYP_MASK;
259 val = pdata->pwm_type << CLASSD_MR_PWMTYP_SHIFT;
260
261 mask |= CLASSD_MR_NON_OVERLAP_MASK;
262 if (pdata->non_overlap_enable) {
263 val |= (CLASSD_MR_NON_OVERLAP_EN
264 << CLASSD_MR_NON_OVERLAP_SHIFT);
265
266 mask |= CLASSD_MR_NOVR_VAL_MASK;
267 switch (pdata->non_overlap_time) {
268 case 5:
269 val |= (CLASSD_MR_NOVR_VAL_5NS
270 << CLASSD_MR_NOVR_VAL_SHIFT);
271 break;
272 case 10:
273 val |= (CLASSD_MR_NOVR_VAL_10NS
274 << CLASSD_MR_NOVR_VAL_SHIFT);
275 break;
276 case 15:
277 val |= (CLASSD_MR_NOVR_VAL_15NS
278 << CLASSD_MR_NOVR_VAL_SHIFT);
279 break;
280 case 20:
281 val |= (CLASSD_MR_NOVR_VAL_20NS
282 << CLASSD_MR_NOVR_VAL_SHIFT);
283 break;
284 default:
285 val |= (CLASSD_MR_NOVR_VAL_10NS
286 << CLASSD_MR_NOVR_VAL_SHIFT);
287 dev_warn(component->dev,
288 "non-overlapping value %d is invalid, the default value 10 is specified\n",
289 pdata->non_overlap_time);
290 break;
291 }
292 }
293
294 snd_soc_component_update_bits(component, CLASSD_MR, mask, val);
295
296 dev_info(component->dev,
297 "PWM modulation type is %s, non-overlapping is %s\n",
298 pwm_type[pdata->pwm_type],
299 pdata->non_overlap_enable?"enabled":"disabled");
300
301 return 0;
302}
303
304static int atmel_classd_component_resume(struct snd_soc_component *component)
305{
306 struct snd_soc_card *card = snd_soc_component_get_drvdata(component);
307 struct atmel_classd *dd = snd_soc_card_get_drvdata(card);
308
309 return regcache_sync(dd->regmap);
310}
311
312static struct snd_soc_component_driver soc_component_dev_classd = {
313 .probe = atmel_classd_component_probe,
314 .resume = atmel_classd_component_resume,
315 .controls = atmel_classd_snd_controls,
316 .num_controls = ARRAY_SIZE(atmel_classd_snd_controls),
317 .idle_bias_on = 1,
318 .use_pmdown_time = 1,
319 .endianness = 1,
320 .non_legacy_dai_naming = 1,
321};
322
323
324static int atmel_classd_codec_dai_startup(struct snd_pcm_substream *substream,
325 struct snd_soc_dai *codec_dai)
326{
327 struct snd_soc_pcm_runtime *rtd = substream->private_data;
328 struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
329
330 return clk_prepare_enable(dd->gclk);
331}
332
333static int atmel_classd_codec_dai_digital_mute(struct snd_soc_dai *codec_dai,
334 int mute)
335{
336 struct snd_soc_component *component = codec_dai->component;
337 u32 mask, val;
338
339 mask = CLASSD_MR_LMUTE_MASK | CLASSD_MR_RMUTE_MASK;
340
341 if (mute)
342 val = mask;
343 else
344 val = 0;
345
346 snd_soc_component_update_bits(component, CLASSD_MR, mask, val);
347
348 return 0;
349}
350
351#define CLASSD_GCLK_RATE_11M2896_MPY_8 (112896 * 100 * 8)
352#define CLASSD_GCLK_RATE_12M288_MPY_8 (12288 * 1000 * 8)
353
354static struct {
355 int rate;
356 int sample_rate;
357 int dsp_clk;
358 unsigned long gclk_rate;
359} const sample_rates[] = {
360 { 8000, CLASSD_INTPMR_FRAME_8K,
361 CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 },
362 { 16000, CLASSD_INTPMR_FRAME_16K,
363 CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 },
364 { 32000, CLASSD_INTPMR_FRAME_32K,
365 CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 },
366 { 48000, CLASSD_INTPMR_FRAME_48K,
367 CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 },
368 { 96000, CLASSD_INTPMR_FRAME_96K,
369 CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 },
370 { 22050, CLASSD_INTPMR_FRAME_22K,
371 CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_GCLK_RATE_11M2896_MPY_8 },
372 { 44100, CLASSD_INTPMR_FRAME_44K,
373 CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_GCLK_RATE_11M2896_MPY_8 },
374 { 88200, CLASSD_INTPMR_FRAME_88K,
375 CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_GCLK_RATE_11M2896_MPY_8 },
376};
377
378static int
379atmel_classd_codec_dai_hw_params(struct snd_pcm_substream *substream,
380 struct snd_pcm_hw_params *params,
381 struct snd_soc_dai *codec_dai)
382{
383 struct snd_soc_pcm_runtime *rtd = substream->private_data;
384 struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
385 struct snd_soc_component *component = codec_dai->component;
386 int fs;
387 int i, best, best_val, cur_val, ret;
388 u32 mask, val;
389
390 fs = params_rate(params);
391
392 best = 0;
393 best_val = abs(fs - sample_rates[0].rate);
394 for (i = 1; i < ARRAY_SIZE(sample_rates); i++) {
395
396 cur_val = abs(fs - sample_rates[i].rate);
397 if (cur_val < best_val) {
398 best = i;
399 best_val = cur_val;
400 }
401 }
402
403 dev_dbg(component->dev,
404 "Selected SAMPLE_RATE of %dHz, GCLK_RATE of %ldHz\n",
405 sample_rates[best].rate, sample_rates[best].gclk_rate);
406
407 clk_disable_unprepare(dd->gclk);
408
409 ret = clk_set_rate(dd->gclk, sample_rates[best].gclk_rate);
410 if (ret)
411 return ret;
412
413 mask = CLASSD_INTPMR_DSP_CLK_FREQ_MASK | CLASSD_INTPMR_FRAME_MASK;
414 val = (sample_rates[best].dsp_clk << CLASSD_INTPMR_DSP_CLK_FREQ_SHIFT)
415 | (sample_rates[best].sample_rate << CLASSD_INTPMR_FRAME_SHIFT);
416
417 snd_soc_component_update_bits(component, CLASSD_INTPMR, mask, val);
418
419 return clk_prepare_enable(dd->gclk);
420}
421
422static void
423atmel_classd_codec_dai_shutdown(struct snd_pcm_substream *substream,
424 struct snd_soc_dai *codec_dai)
425{
426 struct snd_soc_pcm_runtime *rtd = substream->private_data;
427 struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
428
429 clk_disable_unprepare(dd->gclk);
430}
431
432static int atmel_classd_codec_dai_prepare(struct snd_pcm_substream *substream,
433 struct snd_soc_dai *codec_dai)
434{
435 struct snd_soc_component *component = codec_dai->component;
436
437 snd_soc_component_update_bits(component, CLASSD_MR,
438 CLASSD_MR_LEN_MASK | CLASSD_MR_REN_MASK,
439 (CLASSD_MR_LEN_DIS << CLASSD_MR_LEN_SHIFT)
440 |(CLASSD_MR_REN_DIS << CLASSD_MR_REN_SHIFT));
441
442 return 0;
443}
444
445static int atmel_classd_codec_dai_trigger(struct snd_pcm_substream *substream,
446 int cmd, struct snd_soc_dai *codec_dai)
447{
448 struct snd_soc_component *component = codec_dai->component;
449 u32 mask, val;
450
451 mask = CLASSD_MR_LEN_MASK | CLASSD_MR_REN_MASK;
452
453 switch (cmd) {
454 case SNDRV_PCM_TRIGGER_START:
455 case SNDRV_PCM_TRIGGER_RESUME:
456 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
457 val = mask;
458 break;
459 case SNDRV_PCM_TRIGGER_STOP:
460 case SNDRV_PCM_TRIGGER_SUSPEND:
461 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
462 val = (CLASSD_MR_LEN_DIS << CLASSD_MR_LEN_SHIFT)
463 | (CLASSD_MR_REN_DIS << CLASSD_MR_REN_SHIFT);
464 break;
465 default:
466 return -EINVAL;
467 }
468
469 snd_soc_component_update_bits(component, CLASSD_MR, mask, val);
470
471 return 0;
472}
473
474static const struct snd_soc_dai_ops atmel_classd_codec_dai_ops = {
475 .digital_mute = atmel_classd_codec_dai_digital_mute,
476 .startup = atmel_classd_codec_dai_startup,
477 .shutdown = atmel_classd_codec_dai_shutdown,
478 .hw_params = atmel_classd_codec_dai_hw_params,
479 .prepare = atmel_classd_codec_dai_prepare,
480 .trigger = atmel_classd_codec_dai_trigger,
481};
482
483#define ATMEL_CLASSD_CODEC_DAI_NAME "atmel-classd-hifi"
484
485static struct snd_soc_dai_driver atmel_classd_codec_dai = {
486 .name = ATMEL_CLASSD_CODEC_DAI_NAME,
487 .playback = {
488 .stream_name = "Playback",
489 .channels_min = 1,
490 .channels_max = 2,
491 .rates = ATMEL_CLASSD_RATES,
492 .formats = SNDRV_PCM_FMTBIT_S16_LE,
493 },
494 .ops = &atmel_classd_codec_dai_ops,
495};
496
497
498static int atmel_classd_asoc_card_init(struct device *dev,
499 struct snd_soc_card *card)
500{
501 struct snd_soc_dai_link *dai_link;
502 struct atmel_classd *dd = snd_soc_card_get_drvdata(card);
503
504 dai_link = devm_kzalloc(dev, sizeof(*dai_link), GFP_KERNEL);
505 if (!dai_link)
506 return -ENOMEM;
507
508 dai_link->name = "CLASSD";
509 dai_link->stream_name = "CLASSD PCM";
510 dai_link->codec_dai_name = ATMEL_CLASSD_CODEC_DAI_NAME;
511 dai_link->cpu_dai_name = dev_name(dev);
512 dai_link->codec_name = dev_name(dev);
513 dai_link->platform_name = dev_name(dev);
514
515 card->dai_link = dai_link;
516 card->num_links = 1;
517 card->name = dd->pdata->card_name;
518 card->dev = dev;
519
520 return 0;
521};
522
523
524static const struct reg_default atmel_classd_reg_defaults[] = {
525 { CLASSD_INTPMR, 0x00301212 },
526};
527
528#define ATMEL_CLASSD_REG_MAX 0xE4
529static const struct regmap_config atmel_classd_regmap_config = {
530 .reg_bits = 32,
531 .reg_stride = 4,
532 .val_bits = 32,
533 .max_register = ATMEL_CLASSD_REG_MAX,
534
535 .cache_type = REGCACHE_FLAT,
536 .reg_defaults = atmel_classd_reg_defaults,
537 .num_reg_defaults = ARRAY_SIZE(atmel_classd_reg_defaults),
538};
539
540static int atmel_classd_probe(struct platform_device *pdev)
541{
542 struct device *dev = &pdev->dev;
543 struct atmel_classd *dd;
544 struct resource *res;
545 void __iomem *io_base;
546 const struct atmel_classd_pdata *pdata;
547 struct snd_soc_card *card;
548 int ret;
549
550 pdata = dev_get_platdata(dev);
551 if (!pdata) {
552 pdata = atmel_classd_dt_init(dev);
553 if (IS_ERR(pdata))
554 return PTR_ERR(pdata);
555 }
556
557 dd = devm_kzalloc(dev, sizeof(*dd), GFP_KERNEL);
558 if (!dd)
559 return -ENOMEM;
560
561 dd->pdata = pdata;
562
563 dd->irq = platform_get_irq(pdev, 0);
564 if (dd->irq < 0) {
565 ret = dd->irq;
566 dev_err(dev, "failed to could not get irq: %d\n", ret);
567 return ret;
568 }
569
570 dd->pclk = devm_clk_get(dev, "pclk");
571 if (IS_ERR(dd->pclk)) {
572 ret = PTR_ERR(dd->pclk);
573 dev_err(dev, "failed to get peripheral clock: %d\n", ret);
574 return ret;
575 }
576
577 dd->gclk = devm_clk_get(dev, "gclk");
578 if (IS_ERR(dd->gclk)) {
579 ret = PTR_ERR(dd->gclk);
580 dev_err(dev, "failed to get GCK clock: %d\n", ret);
581 return ret;
582 }
583
584 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
585 io_base = devm_ioremap_resource(dev, res);
586 if (IS_ERR(io_base))
587 return PTR_ERR(io_base);
588
589 dd->phy_base = res->start;
590 dd->dev = dev;
591
592 dd->regmap = devm_regmap_init_mmio(dev, io_base,
593 &atmel_classd_regmap_config);
594 if (IS_ERR(dd->regmap)) {
595 ret = PTR_ERR(dd->regmap);
596 dev_err(dev, "failed to init register map: %d\n", ret);
597 return ret;
598 }
599
600 ret = devm_snd_soc_register_component(dev,
601 &atmel_classd_cpu_dai_component,
602 &atmel_classd_cpu_dai, 1);
603 if (ret) {
604 dev_err(dev, "could not register CPU DAI: %d\n", ret);
605 return ret;
606 }
607
608 ret = devm_snd_dmaengine_pcm_register(dev,
609 &atmel_classd_dmaengine_pcm_config,
610 0);
611 if (ret) {
612 dev_err(dev, "could not register platform: %d\n", ret);
613 return ret;
614 }
615
616 ret = devm_snd_soc_register_component(dev, &soc_component_dev_classd,
617 &atmel_classd_codec_dai, 1);
618 if (ret) {
619 dev_err(dev, "could not register component: %d\n", ret);
620 return ret;
621 }
622
623
624 card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
625 if (!card) {
626 ret = -ENOMEM;
627 goto unregister_codec;
628 }
629
630 snd_soc_card_set_drvdata(card, dd);
631
632 ret = atmel_classd_asoc_card_init(dev, card);
633 if (ret) {
634 dev_err(dev, "failed to init sound card\n");
635 goto unregister_codec;
636 }
637
638 ret = devm_snd_soc_register_card(dev, card);
639 if (ret) {
640 dev_err(dev, "failed to register sound card: %d\n", ret);
641 goto unregister_codec;
642 }
643
644 return 0;
645
646unregister_codec:
647 return ret;
648}
649
650static int atmel_classd_remove(struct platform_device *pdev)
651{
652 return 0;
653}
654
655static struct platform_driver atmel_classd_driver = {
656 .driver = {
657 .name = "atmel-classd",
658 .of_match_table = of_match_ptr(atmel_classd_of_match),
659 .pm = &snd_soc_pm_ops,
660 },
661 .probe = atmel_classd_probe,
662 .remove = atmel_classd_remove,
663};
664module_platform_driver(atmel_classd_driver);
665
666MODULE_DESCRIPTION("Atmel ClassD driver under ALSA SoC architecture");
667MODULE_AUTHOR("Songjun Wu <songjun.wu@atmel.com>");
668MODULE_LICENSE("GPL");
669
