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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 int irq;
36 const struct atmel_classd_pdata *pdata;
37};
38
39#ifdef CONFIG_OF
40static const struct of_device_id atmel_classd_of_match[] = {
41 {
42 .compatible = "atmel,sama5d2-classd",
43 }, {
44
45 }
46};
47MODULE_DEVICE_TABLE(of, atmel_classd_of_match);
48
49static struct atmel_classd_pdata *atmel_classd_dt_init(struct device *dev)
50{
51 struct device_node *np = dev->of_node;
52 struct atmel_classd_pdata *pdata;
53 const char *pwm_type;
54 int ret;
55
56 if (!np) {
57 dev_err(dev, "device node not found\n");
58 return ERR_PTR(-EINVAL);
59 }
60
61 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
62 if (!pdata)
63 return ERR_PTR(-ENOMEM);
64
65 ret = of_property_read_string(np, "atmel,pwm-type", &pwm_type);
66 if ((ret == 0) && (strcmp(pwm_type, "diff") == 0))
67 pdata->pwm_type = CLASSD_MR_PWMTYP_DIFF;
68 else
69 pdata->pwm_type = CLASSD_MR_PWMTYP_SINGLE;
70
71 ret = of_property_read_u32(np,
72 "atmel,non-overlap-time", &pdata->non_overlap_time);
73 if (ret)
74 pdata->non_overlap_enable = false;
75 else
76 pdata->non_overlap_enable = true;
77
78 ret = of_property_read_string(np, "atmel,model", &pdata->card_name);
79 if (ret)
80 pdata->card_name = "CLASSD";
81
82 return pdata;
83}
84#else
85static inline struct atmel_classd_pdata *
86atmel_classd_dt_init(struct device *dev)
87{
88 return ERR_PTR(-EINVAL);
89}
90#endif
91
92#define ATMEL_CLASSD_RATES (SNDRV_PCM_RATE_8000 \
93 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 \
94 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 \
95 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 \
96 | SNDRV_PCM_RATE_96000)
97
98static const struct snd_pcm_hardware atmel_classd_hw = {
99 .info = SNDRV_PCM_INFO_MMAP
100 | SNDRV_PCM_INFO_MMAP_VALID
101 | SNDRV_PCM_INFO_INTERLEAVED
102 | SNDRV_PCM_INFO_RESUME
103 | SNDRV_PCM_INFO_PAUSE,
104 .formats = (SNDRV_PCM_FMTBIT_S16_LE),
105 .rates = ATMEL_CLASSD_RATES,
106 .rate_min = 8000,
107 .rate_max = 96000,
108 .channels_min = 1,
109 .channels_max = 2,
110 .buffer_bytes_max = 64 * 1024,
111 .period_bytes_min = 256,
112 .period_bytes_max = 32 * 1024,
113 .periods_min = 2,
114 .periods_max = 256,
115};
116
117#define ATMEL_CLASSD_PREALLOC_BUF_SIZE (64 * 1024)
118
119
120static int atmel_classd_cpu_dai_startup(struct snd_pcm_substream *substream,
121 struct snd_soc_dai *cpu_dai)
122{
123 struct snd_soc_pcm_runtime *rtd = substream->private_data;
124 struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
125
126 regmap_write(dd->regmap, CLASSD_THR, 0x0);
127
128 return clk_prepare_enable(dd->pclk);
129}
130
131static void atmel_classd_cpu_dai_shutdown(struct snd_pcm_substream *substream,
132 struct snd_soc_dai *cpu_dai)
133{
134 struct snd_soc_pcm_runtime *rtd = substream->private_data;
135 struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
136
137 clk_disable_unprepare(dd->pclk);
138}
139
140static const struct snd_soc_dai_ops atmel_classd_cpu_dai_ops = {
141 .startup = atmel_classd_cpu_dai_startup,
142 .shutdown = atmel_classd_cpu_dai_shutdown,
143};
144
145static struct snd_soc_dai_driver atmel_classd_cpu_dai = {
146 .playback = {
147 .channels_min = 1,
148 .channels_max = 2,
149 .rates = ATMEL_CLASSD_RATES,
150 .formats = SNDRV_PCM_FMTBIT_S16_LE,},
151 .ops = &atmel_classd_cpu_dai_ops,
152};
153
154static const struct snd_soc_component_driver atmel_classd_cpu_dai_component = {
155 .name = "atmel-classd",
156};
157
158
159static int
160atmel_classd_platform_configure_dma(struct snd_pcm_substream *substream,
161 struct snd_pcm_hw_params *params,
162 struct dma_slave_config *slave_config)
163{
164 struct snd_soc_pcm_runtime *rtd = substream->private_data;
165 struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
166
167 if (params_physical_width(params) != 16) {
168 dev_err(rtd->platform->dev,
169 "only supports 16-bit audio data\n");
170 return -EINVAL;
171 }
172
173 if (params_channels(params) == 1)
174 slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES;
175 else
176 slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
177
178 slave_config->direction = DMA_MEM_TO_DEV;
179 slave_config->dst_addr = dd->phy_base + CLASSD_THR;
180 slave_config->dst_maxburst = 1;
181 slave_config->src_maxburst = 1;
182 slave_config->device_fc = false;
183
184 return 0;
185}
186
187static const struct snd_dmaengine_pcm_config
188atmel_classd_dmaengine_pcm_config = {
189 .prepare_slave_config = atmel_classd_platform_configure_dma,
190 .pcm_hardware = &atmel_classd_hw,
191 .prealloc_buffer_size = ATMEL_CLASSD_PREALLOC_BUF_SIZE,
192};
193
194
195static const char * const mono_mode_text[] = {
196 "mix", "sat", "left", "right"
197};
198
199static SOC_ENUM_SINGLE_DECL(classd_mono_mode_enum,
200 CLASSD_INTPMR, CLASSD_INTPMR_MONO_MODE_SHIFT,
201 mono_mode_text);
202
203static const char * const eqcfg_text[] = {
204 "Treble-12dB", "Treble-6dB",
205 "Medium-8dB", "Medium-3dB",
206 "Bass-12dB", "Bass-6dB",
207 "0 dB",
208 "Bass+6dB", "Bass+12dB",
209 "Medium+3dB", "Medium+8dB",
210 "Treble+6dB", "Treble+12dB",
211};
212
213static const unsigned int eqcfg_value[] = {
214 CLASSD_INTPMR_EQCFG_T_CUT_12, CLASSD_INTPMR_EQCFG_T_CUT_6,
215 CLASSD_INTPMR_EQCFG_M_CUT_8, CLASSD_INTPMR_EQCFG_M_CUT_3,
216 CLASSD_INTPMR_EQCFG_B_CUT_12, CLASSD_INTPMR_EQCFG_B_CUT_6,
217 CLASSD_INTPMR_EQCFG_FLAT,
218 CLASSD_INTPMR_EQCFG_B_BOOST_6, CLASSD_INTPMR_EQCFG_B_BOOST_12,
219 CLASSD_INTPMR_EQCFG_M_BOOST_3, CLASSD_INTPMR_EQCFG_M_BOOST_8,
220 CLASSD_INTPMR_EQCFG_T_BOOST_6, CLASSD_INTPMR_EQCFG_T_BOOST_12,
221};
222
223static SOC_VALUE_ENUM_SINGLE_DECL(classd_eqcfg_enum,
224 CLASSD_INTPMR, CLASSD_INTPMR_EQCFG_SHIFT, 0xf,
225 eqcfg_text, eqcfg_value);
226
227static const DECLARE_TLV_DB_SCALE(classd_digital_tlv, -7800, 100, 1);
228
229static const struct snd_kcontrol_new atmel_classd_snd_controls[] = {
230SOC_DOUBLE_TLV("Playback Volume", CLASSD_INTPMR,
231 CLASSD_INTPMR_ATTL_SHIFT, CLASSD_INTPMR_ATTR_SHIFT,
232 78, 1, classd_digital_tlv),
233
234SOC_SINGLE("Deemphasis Switch", CLASSD_INTPMR,
235 CLASSD_INTPMR_DEEMP_SHIFT, 1, 0),
236
237SOC_SINGLE("Mono Switch", CLASSD_INTPMR, CLASSD_INTPMR_MONO_SHIFT, 1, 0),
238
239SOC_SINGLE("Swap Switch", CLASSD_INTPMR, CLASSD_INTPMR_SWAP_SHIFT, 1, 0),
240
241SOC_ENUM("Mono Mode", classd_mono_mode_enum),
242
243SOC_ENUM("EQ", classd_eqcfg_enum),
244};
245
246static const char * const pwm_type[] = {
247 "Single ended", "Differential"
248};
249
250static int atmel_classd_codec_probe(struct snd_soc_codec *codec)
251{
252 struct snd_soc_card *card = snd_soc_codec_get_drvdata(codec);
253 struct atmel_classd *dd = snd_soc_card_get_drvdata(card);
254 const struct atmel_classd_pdata *pdata = dd->pdata;
255 u32 mask, val;
256
257 mask = CLASSD_MR_PWMTYP_MASK;
258 val = pdata->pwm_type << CLASSD_MR_PWMTYP_SHIFT;
259
260 mask |= CLASSD_MR_NON_OVERLAP_MASK;
261 if (pdata->non_overlap_enable) {
262 val |= (CLASSD_MR_NON_OVERLAP_EN
263 << CLASSD_MR_NON_OVERLAP_SHIFT);
264
265 mask |= CLASSD_MR_NOVR_VAL_MASK;
266 switch (pdata->non_overlap_time) {
267 case 5:
268 val |= (CLASSD_MR_NOVR_VAL_5NS
269 << CLASSD_MR_NOVR_VAL_SHIFT);
270 break;
271 case 10:
272 val |= (CLASSD_MR_NOVR_VAL_10NS
273 << CLASSD_MR_NOVR_VAL_SHIFT);
274 break;
275 case 15:
276 val |= (CLASSD_MR_NOVR_VAL_15NS
277 << CLASSD_MR_NOVR_VAL_SHIFT);
278 break;
279 case 20:
280 val |= (CLASSD_MR_NOVR_VAL_20NS
281 << CLASSD_MR_NOVR_VAL_SHIFT);
282 break;
283 default:
284 val |= (CLASSD_MR_NOVR_VAL_10NS
285 << CLASSD_MR_NOVR_VAL_SHIFT);
286 dev_warn(codec->dev,
287 "non-overlapping value %d is invalid, the default value 10 is specified\n",
288 pdata->non_overlap_time);
289 break;
290 }
291 }
292
293 snd_soc_update_bits(codec, CLASSD_MR, mask, val);
294
295 dev_info(codec->dev,
296 "PWM modulation type is %s, non-overlapping is %s\n",
297 pwm_type[pdata->pwm_type],
298 pdata->non_overlap_enable?"enabled":"disabled");
299
300 return 0;
301}
302
303static int atmel_classd_codec_resume(struct snd_soc_codec *codec)
304{
305 struct snd_soc_card *card = snd_soc_codec_get_drvdata(codec);
306 struct atmel_classd *dd = snd_soc_card_get_drvdata(card);
307
308 return regcache_sync(dd->regmap);
309}
310
311static struct snd_soc_codec_driver soc_codec_dev_classd = {
312 .probe = atmel_classd_codec_probe,
313 .resume = atmel_classd_codec_resume,
314 .component_driver = {
315 .controls = atmel_classd_snd_controls,
316 .num_controls = ARRAY_SIZE(atmel_classd_snd_controls),
317 },
318};
319
320
321static int atmel_classd_codec_dai_startup(struct snd_pcm_substream *substream,
322 struct snd_soc_dai *codec_dai)
323{
324 struct snd_soc_pcm_runtime *rtd = substream->private_data;
325 struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
326
327 return clk_prepare_enable(dd->gclk);
328}
329
330static int atmel_classd_codec_dai_digital_mute(struct snd_soc_dai *codec_dai,
331 int mute)
332{
333 struct snd_soc_codec *codec = codec_dai->codec;
334 u32 mask, val;
335
336 mask = CLASSD_MR_LMUTE_MASK | CLASSD_MR_RMUTE_MASK;
337
338 if (mute)
339 val = mask;
340 else
341 val = 0;
342
343 snd_soc_update_bits(codec, CLASSD_MR, mask, val);
344
345 return 0;
346}
347
348#define CLASSD_GCLK_RATE_11M2896_MPY_8 (112896 * 100 * 8)
349#define CLASSD_GCLK_RATE_12M288_MPY_8 (12288 * 1000 * 8)
350
351static struct {
352 int rate;
353 int sample_rate;
354 int dsp_clk;
355 unsigned long gclk_rate;
356} const sample_rates[] = {
357 { 8000, CLASSD_INTPMR_FRAME_8K,
358 CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 },
359 { 16000, CLASSD_INTPMR_FRAME_16K,
360 CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 },
361 { 32000, CLASSD_INTPMR_FRAME_32K,
362 CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 },
363 { 48000, CLASSD_INTPMR_FRAME_48K,
364 CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 },
365 { 96000, CLASSD_INTPMR_FRAME_96K,
366 CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_GCLK_RATE_12M288_MPY_8 },
367 { 22050, CLASSD_INTPMR_FRAME_22K,
368 CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_GCLK_RATE_11M2896_MPY_8 },
369 { 44100, CLASSD_INTPMR_FRAME_44K,
370 CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_GCLK_RATE_11M2896_MPY_8 },
371 { 88200, CLASSD_INTPMR_FRAME_88K,
372 CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_GCLK_RATE_11M2896_MPY_8 },
373};
374
375static int
376atmel_classd_codec_dai_hw_params(struct snd_pcm_substream *substream,
377 struct snd_pcm_hw_params *params,
378 struct snd_soc_dai *codec_dai)
379{
380 struct snd_soc_pcm_runtime *rtd = substream->private_data;
381 struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
382 struct snd_soc_codec *codec = codec_dai->codec;
383 int fs;
384 int i, best, best_val, cur_val, ret;
385 u32 mask, val;
386
387 fs = params_rate(params);
388
389 best = 0;
390 best_val = abs(fs - sample_rates[0].rate);
391 for (i = 1; i < ARRAY_SIZE(sample_rates); i++) {
392
393 cur_val = abs(fs - sample_rates[i].rate);
394 if (cur_val < best_val) {
395 best = i;
396 best_val = cur_val;
397 }
398 }
399
400 dev_dbg(codec->dev,
401 "Selected SAMPLE_RATE of %dHz, GCLK_RATE of %ldHz\n",
402 sample_rates[best].rate, sample_rates[best].gclk_rate);
403
404 clk_disable_unprepare(dd->gclk);
405
406 ret = clk_set_rate(dd->gclk, sample_rates[best].gclk_rate);
407 if (ret)
408 return ret;
409
410 mask = CLASSD_INTPMR_DSP_CLK_FREQ_MASK | CLASSD_INTPMR_FRAME_MASK;
411 val = (sample_rates[best].dsp_clk << CLASSD_INTPMR_DSP_CLK_FREQ_SHIFT)
412 | (sample_rates[best].sample_rate << CLASSD_INTPMR_FRAME_SHIFT);
413
414 snd_soc_update_bits(codec, CLASSD_INTPMR, mask, val);
415
416 return clk_prepare_enable(dd->gclk);
417}
418
419static void
420atmel_classd_codec_dai_shutdown(struct snd_pcm_substream *substream,
421 struct snd_soc_dai *codec_dai)
422{
423 struct snd_soc_pcm_runtime *rtd = substream->private_data;
424 struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
425
426 clk_disable_unprepare(dd->gclk);
427}
428
429static int atmel_classd_codec_dai_prepare(struct snd_pcm_substream *substream,
430 struct snd_soc_dai *codec_dai)
431{
432 struct snd_soc_codec *codec = codec_dai->codec;
433
434 snd_soc_update_bits(codec, CLASSD_MR,
435 CLASSD_MR_LEN_MASK | CLASSD_MR_REN_MASK,
436 (CLASSD_MR_LEN_DIS << CLASSD_MR_LEN_SHIFT)
437 |(CLASSD_MR_REN_DIS << CLASSD_MR_REN_SHIFT));
438
439 return 0;
440}
441
442static int atmel_classd_codec_dai_trigger(struct snd_pcm_substream *substream,
443 int cmd, struct snd_soc_dai *codec_dai)
444{
445 struct snd_soc_codec *codec = codec_dai->codec;
446 u32 mask, val;
447
448 mask = CLASSD_MR_LEN_MASK | CLASSD_MR_REN_MASK;
449
450 switch (cmd) {
451 case SNDRV_PCM_TRIGGER_START:
452 case SNDRV_PCM_TRIGGER_RESUME:
453 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
454 val = mask;
455 break;
456 case SNDRV_PCM_TRIGGER_STOP:
457 case SNDRV_PCM_TRIGGER_SUSPEND:
458 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
459 val = (CLASSD_MR_LEN_DIS << CLASSD_MR_LEN_SHIFT)
460 | (CLASSD_MR_REN_DIS << CLASSD_MR_REN_SHIFT);
461 break;
462 default:
463 return -EINVAL;
464 }
465
466 snd_soc_update_bits(codec, CLASSD_MR, mask, val);
467
468 return 0;
469}
470
471static const struct snd_soc_dai_ops atmel_classd_codec_dai_ops = {
472 .digital_mute = atmel_classd_codec_dai_digital_mute,
473 .startup = atmel_classd_codec_dai_startup,
474 .shutdown = atmel_classd_codec_dai_shutdown,
475 .hw_params = atmel_classd_codec_dai_hw_params,
476 .prepare = atmel_classd_codec_dai_prepare,
477 .trigger = atmel_classd_codec_dai_trigger,
478};
479
480#define ATMEL_CLASSD_CODEC_DAI_NAME "atmel-classd-hifi"
481
482static struct snd_soc_dai_driver atmel_classd_codec_dai = {
483 .name = ATMEL_CLASSD_CODEC_DAI_NAME,
484 .playback = {
485 .stream_name = "Playback",
486 .channels_min = 1,
487 .channels_max = 2,
488 .rates = ATMEL_CLASSD_RATES,
489 .formats = SNDRV_PCM_FMTBIT_S16_LE,
490 },
491 .ops = &atmel_classd_codec_dai_ops,
492};
493
494
495static int atmel_classd_asoc_card_init(struct device *dev,
496 struct snd_soc_card *card)
497{
498 struct snd_soc_dai_link *dai_link;
499 struct atmel_classd *dd = snd_soc_card_get_drvdata(card);
500
501 dai_link = devm_kzalloc(dev, sizeof(*dai_link), GFP_KERNEL);
502 if (!dai_link)
503 return -ENOMEM;
504
505 dai_link->name = "CLASSD";
506 dai_link->stream_name = "CLASSD PCM";
507 dai_link->codec_dai_name = ATMEL_CLASSD_CODEC_DAI_NAME;
508 dai_link->cpu_dai_name = dev_name(dev);
509 dai_link->codec_name = dev_name(dev);
510 dai_link->platform_name = dev_name(dev);
511
512 card->dai_link = dai_link;
513 card->num_links = 1;
514 card->name = dd->pdata->card_name;
515 card->dev = dev;
516
517 return 0;
518};
519
520
521static const struct reg_default atmel_classd_reg_defaults[] = {
522 { CLASSD_INTPMR, 0x00301212 },
523};
524
525#define ATMEL_CLASSD_REG_MAX 0xE4
526static const struct regmap_config atmel_classd_regmap_config = {
527 .reg_bits = 32,
528 .reg_stride = 4,
529 .val_bits = 32,
530 .max_register = ATMEL_CLASSD_REG_MAX,
531
532 .cache_type = REGCACHE_FLAT,
533 .reg_defaults = atmel_classd_reg_defaults,
534 .num_reg_defaults = ARRAY_SIZE(atmel_classd_reg_defaults),
535};
536
537static int atmel_classd_probe(struct platform_device *pdev)
538{
539 struct device *dev = &pdev->dev;
540 struct atmel_classd *dd;
541 struct resource *res;
542 void __iomem *io_base;
543 const struct atmel_classd_pdata *pdata;
544 struct snd_soc_card *card;
545 int ret;
546
547 pdata = dev_get_platdata(dev);
548 if (!pdata) {
549 pdata = atmel_classd_dt_init(dev);
550 if (IS_ERR(pdata))
551 return PTR_ERR(pdata);
552 }
553
554 dd = devm_kzalloc(dev, sizeof(*dd), GFP_KERNEL);
555 if (!dd)
556 return -ENOMEM;
557
558 dd->pdata = pdata;
559
560 dd->irq = platform_get_irq(pdev, 0);
561 if (dd->irq < 0) {
562 ret = dd->irq;
563 dev_err(dev, "failed to could not get irq: %d\n", ret);
564 return ret;
565 }
566
567 dd->pclk = devm_clk_get(dev, "pclk");
568 if (IS_ERR(dd->pclk)) {
569 ret = PTR_ERR(dd->pclk);
570 dev_err(dev, "failed to get peripheral clock: %d\n", ret);
571 return ret;
572 }
573
574 dd->gclk = devm_clk_get(dev, "gclk");
575 if (IS_ERR(dd->gclk)) {
576 ret = PTR_ERR(dd->gclk);
577 dev_err(dev, "failed to get GCK clock: %d\n", ret);
578 return ret;
579 }
580
581 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
582 io_base = devm_ioremap_resource(dev, res);
583 if (IS_ERR(io_base)) {
584 ret = PTR_ERR(io_base);
585 dev_err(dev, "failed to remap register memory: %d\n", ret);
586 return ret;
587 }
588
589 dd->phy_base = res->start;
590
591 dd->regmap = devm_regmap_init_mmio(dev, io_base,
592 &atmel_classd_regmap_config);
593 if (IS_ERR(dd->regmap)) {
594 ret = PTR_ERR(dd->regmap);
595 dev_err(dev, "failed to init register map: %d\n", ret);
596 return ret;
597 }
598
599 ret = devm_snd_soc_register_component(dev,
600 &atmel_classd_cpu_dai_component,
601 &atmel_classd_cpu_dai, 1);
602 if (ret) {
603 dev_err(dev, "could not register CPU DAI: %d\n", ret);
604 return ret;
605 }
606
607 ret = devm_snd_dmaengine_pcm_register(dev,
608 &atmel_classd_dmaengine_pcm_config,
609 0);
610 if (ret) {
611 dev_err(dev, "could not register platform: %d\n", ret);
612 return ret;
613 }
614
615 ret = snd_soc_register_codec(dev, &soc_codec_dev_classd,
616 &atmel_classd_codec_dai, 1);
617 if (ret) {
618 dev_err(dev, "could not register codec: %d\n", ret);
619 return ret;
620 }
621
622
623 card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
624 if (!card) {
625 ret = -ENOMEM;
626 goto unregister_codec;
627 }
628
629 snd_soc_card_set_drvdata(card, dd);
630
631 ret = atmel_classd_asoc_card_init(dev, card);
632 if (ret) {
633 dev_err(dev, "failed to init sound card\n");
634 goto unregister_codec;
635 }
636
637 ret = devm_snd_soc_register_card(dev, card);
638 if (ret) {
639 dev_err(dev, "failed to register sound card: %d\n", ret);
640 goto unregister_codec;
641 }
642
643 return 0;
644
645unregister_codec:
646 snd_soc_unregister_codec(dev);
647 return ret;
648}
649
650static int atmel_classd_remove(struct platform_device *pdev)
651{
652 snd_soc_unregister_codec(&pdev->dev);
653 return 0;
654}
655
656static struct platform_driver atmel_classd_driver = {
657 .driver = {
658 .name = "atmel-classd",
659 .of_match_table = of_match_ptr(atmel_classd_of_match),
660 .pm = &snd_soc_pm_ops,
661 },
662 .probe = atmel_classd_probe,
663 .remove = atmel_classd_remove,
664};
665module_platform_driver(atmel_classd_driver);
666
667MODULE_DESCRIPTION("Atmel ClassD driver under ALSA SoC architecture");
668MODULE_AUTHOR("Songjun Wu <songjun.wu@atmel.com>");
669MODULE_LICENSE("GPL");
670
