x86/mm/pat: Don't report PAT on CPUs that don't support it
[linux/fpc-iii.git] / sound / soc / atmel / atmel-classd.c
blob7ae46c2647d453bcad1176b6877fcbbae110416b
1 /* Atmel ALSA SoC Audio Class D Amplifier (CLASSD) driver
3 * Copyright (C) 2015 Atmel
5 * Author: Songjun Wu <songjun.wu@atmel.com>
7 * This program is free software; you can redistribute it and/or modify
8 * it under the terms of the GNU General Public License version 2 or later
9 * as published by the Free Software Foundation.
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"
23 struct atmel_classd_pdata {
24 bool non_overlap_enable;
25 int non_overlap_time;
26 int pwm_type;
27 const char *card_name;
30 struct atmel_classd {
31 dma_addr_t phy_base;
32 struct regmap *regmap;
33 struct clk *pclk;
34 struct clk *gclk;
35 struct clk *aclk;
36 int irq;
37 const struct atmel_classd_pdata *pdata;
40 #ifdef CONFIG_OF
41 static const struct of_device_id atmel_classd_of_match[] = {
43 .compatible = "atmel,sama5d2-classd",
44 }, {
45 /* sentinel */
48 MODULE_DEVICE_TABLE(of, atmel_classd_of_match);
50 static struct atmel_classd_pdata *atmel_classd_dt_init(struct device *dev)
52 struct device_node *np = dev->of_node;
53 struct atmel_classd_pdata *pdata;
54 const char *pwm_type;
55 int ret;
57 if (!np) {
58 dev_err(dev, "device node not found\n");
59 return ERR_PTR(-EINVAL);
62 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
63 if (!pdata)
64 return ERR_PTR(-ENOMEM);
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;
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;
79 ret = of_property_read_string(np, "atmel,model", &pdata->card_name);
80 if (ret)
81 pdata->card_name = "CLASSD";
83 return pdata;
85 #else
86 static inline struct atmel_classd_pdata *
87 atmel_classd_dt_init(struct device *dev)
89 return ERR_PTR(-EINVAL);
91 #endif
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)
99 static 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,
118 #define ATMEL_CLASSD_PREALLOC_BUF_SIZE (64 * 1024)
120 /* cpu dai component */
121 static int atmel_classd_cpu_dai_startup(struct snd_pcm_substream *substream,
122 struct snd_soc_dai *cpu_dai)
124 struct snd_soc_pcm_runtime *rtd = substream->private_data;
125 struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
127 regmap_write(dd->regmap, CLASSD_THR, 0x0);
129 return clk_prepare_enable(dd->pclk);
132 static void atmel_classd_cpu_dai_shutdown(struct snd_pcm_substream *substream,
133 struct snd_soc_dai *cpu_dai)
135 struct snd_soc_pcm_runtime *rtd = substream->private_data;
136 struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
138 clk_disable_unprepare(dd->pclk);
141 static 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,
146 static 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,
155 static const struct snd_soc_component_driver atmel_classd_cpu_dai_component = {
156 .name = "atmel-classd",
159 /* platform */
160 static int
161 atmel_classd_platform_configure_dma(struct snd_pcm_substream *substream,
162 struct snd_pcm_hw_params *params,
163 struct dma_slave_config *slave_config)
165 struct snd_soc_pcm_runtime *rtd = substream->private_data;
166 struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
168 if (params_physical_width(params) != 16) {
169 dev_err(rtd->platform->dev,
170 "only supports 16-bit audio data\n");
171 return -EINVAL;
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;
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;
185 return 0;
188 static const struct snd_dmaengine_pcm_config
189 atmel_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,
195 /* codec */
196 static const char * const mono_mode_text[] = {
197 "mix", "sat", "left", "right"
200 static SOC_ENUM_SINGLE_DECL(classd_mono_mode_enum,
201 CLASSD_INTPMR, CLASSD_INTPMR_MONO_MODE_SHIFT,
202 mono_mode_text);
204 static 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",
214 static 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,
224 static SOC_VALUE_ENUM_SINGLE_DECL(classd_eqcfg_enum,
225 CLASSD_INTPMR, CLASSD_INTPMR_EQCFG_SHIFT, 0xf,
226 eqcfg_text, eqcfg_value);
228 static const DECLARE_TLV_DB_SCALE(classd_digital_tlv, -7800, 100, 1);
230 static const struct snd_kcontrol_new atmel_classd_snd_controls[] = {
231 SOC_DOUBLE_TLV("Playback Volume", CLASSD_INTPMR,
232 CLASSD_INTPMR_ATTL_SHIFT, CLASSD_INTPMR_ATTR_SHIFT,
233 78, 1, classd_digital_tlv),
235 SOC_SINGLE("Deemphasis Switch", CLASSD_INTPMR,
236 CLASSD_INTPMR_DEEMP_SHIFT, 1, 0),
238 SOC_SINGLE("Mono Switch", CLASSD_INTPMR, CLASSD_INTPMR_MONO_SHIFT, 1, 0),
240 SOC_SINGLE("Swap Switch", CLASSD_INTPMR, CLASSD_INTPMR_SWAP_SHIFT, 1, 0),
242 SOC_ENUM("Mono Mode", classd_mono_mode_enum),
244 SOC_ENUM("EQ", classd_eqcfg_enum),
247 static const char * const pwm_type[] = {
248 "Single ended", "Differential"
251 static int atmel_classd_codec_probe(struct snd_soc_codec *codec)
253 struct snd_soc_card *card = snd_soc_codec_get_drvdata(codec);
254 struct atmel_classd *dd = snd_soc_card_get_drvdata(card);
255 const struct atmel_classd_pdata *pdata = dd->pdata;
256 u32 mask, val;
258 mask = CLASSD_MR_PWMTYP_MASK;
259 val = pdata->pwm_type << CLASSD_MR_PWMTYP_SHIFT;
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);
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(codec->dev,
288 "non-overlapping value %d is invalid, the default value 10 is specified\n",
289 pdata->non_overlap_time);
290 break;
294 snd_soc_update_bits(codec, CLASSD_MR, mask, val);
296 dev_info(codec->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");
301 return 0;
304 static struct regmap *atmel_classd_codec_get_remap(struct device *dev)
306 return dev_get_regmap(dev, NULL);
309 static struct snd_soc_codec_driver soc_codec_dev_classd = {
310 .probe = atmel_classd_codec_probe,
311 .get_regmap = atmel_classd_codec_get_remap,
312 .component_driver = {
313 .controls = atmel_classd_snd_controls,
314 .num_controls = ARRAY_SIZE(atmel_classd_snd_controls),
318 /* codec dai component */
319 static int atmel_classd_codec_dai_startup(struct snd_pcm_substream *substream,
320 struct snd_soc_dai *codec_dai)
322 struct snd_soc_pcm_runtime *rtd = substream->private_data;
323 struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
324 int ret;
326 ret = clk_prepare_enable(dd->aclk);
327 if (ret)
328 return ret;
330 return clk_prepare_enable(dd->gclk);
333 static int atmel_classd_codec_dai_digital_mute(struct snd_soc_dai *codec_dai,
334 int mute)
336 struct snd_soc_codec *codec = codec_dai->codec;
337 u32 mask, val;
339 mask = CLASSD_MR_LMUTE_MASK | CLASSD_MR_RMUTE_MASK;
341 if (mute)
342 val = mask;
343 else
344 val = 0;
346 snd_soc_update_bits(codec, CLASSD_MR, mask, val);
348 return 0;
351 #define CLASSD_ACLK_RATE_11M2896_MPY_8 (112896 * 100 * 8)
352 #define CLASSD_ACLK_RATE_12M288_MPY_8 (12288 * 1000 * 8)
354 static struct {
355 int rate;
356 int sample_rate;
357 int dsp_clk;
358 unsigned long aclk_rate;
359 } const sample_rates[] = {
360 { 8000, CLASSD_INTPMR_FRAME_8K,
361 CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 },
362 { 16000, CLASSD_INTPMR_FRAME_16K,
363 CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 },
364 { 32000, CLASSD_INTPMR_FRAME_32K,
365 CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 },
366 { 48000, CLASSD_INTPMR_FRAME_48K,
367 CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 },
368 { 96000, CLASSD_INTPMR_FRAME_96K,
369 CLASSD_INTPMR_DSP_CLK_FREQ_12M288, CLASSD_ACLK_RATE_12M288_MPY_8 },
370 { 22050, CLASSD_INTPMR_FRAME_22K,
371 CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_ACLK_RATE_11M2896_MPY_8 },
372 { 44100, CLASSD_INTPMR_FRAME_44K,
373 CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_ACLK_RATE_11M2896_MPY_8 },
374 { 88200, CLASSD_INTPMR_FRAME_88K,
375 CLASSD_INTPMR_DSP_CLK_FREQ_11M2896, CLASSD_ACLK_RATE_11M2896_MPY_8 },
378 static int
379 atmel_classd_codec_dai_hw_params(struct snd_pcm_substream *substream,
380 struct snd_pcm_hw_params *params,
381 struct snd_soc_dai *codec_dai)
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_codec *codec = codec_dai->codec;
386 int fs;
387 int i, best, best_val, cur_val, ret;
388 u32 mask, val;
390 fs = params_rate(params);
392 best = 0;
393 best_val = abs(fs - sample_rates[0].rate);
394 for (i = 1; i < ARRAY_SIZE(sample_rates); i++) {
395 /* Closest match */
396 cur_val = abs(fs - sample_rates[i].rate);
397 if (cur_val < best_val) {
398 best = i;
399 best_val = cur_val;
403 dev_dbg(codec->dev,
404 "Selected SAMPLE_RATE of %dHz, ACLK_RATE of %ldHz\n",
405 sample_rates[best].rate, sample_rates[best].aclk_rate);
407 clk_disable_unprepare(dd->gclk);
408 clk_disable_unprepare(dd->aclk);
410 ret = clk_set_rate(dd->aclk, sample_rates[best].aclk_rate);
411 if (ret)
412 return ret;
414 mask = CLASSD_INTPMR_DSP_CLK_FREQ_MASK | CLASSD_INTPMR_FRAME_MASK;
415 val = (sample_rates[best].dsp_clk << CLASSD_INTPMR_DSP_CLK_FREQ_SHIFT)
416 | (sample_rates[best].sample_rate << CLASSD_INTPMR_FRAME_SHIFT);
418 snd_soc_update_bits(codec, CLASSD_INTPMR, mask, val);
420 ret = clk_prepare_enable(dd->aclk);
421 if (ret)
422 return ret;
424 return clk_prepare_enable(dd->gclk);
427 static void
428 atmel_classd_codec_dai_shutdown(struct snd_pcm_substream *substream,
429 struct snd_soc_dai *codec_dai)
431 struct snd_soc_pcm_runtime *rtd = substream->private_data;
432 struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card);
434 clk_disable_unprepare(dd->gclk);
435 clk_disable_unprepare(dd->aclk);
438 static int atmel_classd_codec_dai_prepare(struct snd_pcm_substream *substream,
439 struct snd_soc_dai *codec_dai)
441 struct snd_soc_codec *codec = codec_dai->codec;
443 snd_soc_update_bits(codec, CLASSD_MR,
444 CLASSD_MR_LEN_MASK | CLASSD_MR_REN_MASK,
445 (CLASSD_MR_LEN_DIS << CLASSD_MR_LEN_SHIFT)
446 |(CLASSD_MR_REN_DIS << CLASSD_MR_REN_SHIFT));
448 return 0;
451 static int atmel_classd_codec_dai_trigger(struct snd_pcm_substream *substream,
452 int cmd, struct snd_soc_dai *codec_dai)
454 struct snd_soc_codec *codec = codec_dai->codec;
455 u32 mask, val;
457 mask = CLASSD_MR_LEN_MASK | CLASSD_MR_REN_MASK;
459 switch (cmd) {
460 case SNDRV_PCM_TRIGGER_START:
461 case SNDRV_PCM_TRIGGER_RESUME:
462 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
463 val = mask;
464 break;
465 case SNDRV_PCM_TRIGGER_STOP:
466 case SNDRV_PCM_TRIGGER_SUSPEND:
467 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
468 val = (CLASSD_MR_LEN_DIS << CLASSD_MR_LEN_SHIFT)
469 | (CLASSD_MR_REN_DIS << CLASSD_MR_REN_SHIFT);
470 break;
471 default:
472 return -EINVAL;
475 snd_soc_update_bits(codec, CLASSD_MR, mask, val);
477 return 0;
480 static const struct snd_soc_dai_ops atmel_classd_codec_dai_ops = {
481 .digital_mute = atmel_classd_codec_dai_digital_mute,
482 .startup = atmel_classd_codec_dai_startup,
483 .shutdown = atmel_classd_codec_dai_shutdown,
484 .hw_params = atmel_classd_codec_dai_hw_params,
485 .prepare = atmel_classd_codec_dai_prepare,
486 .trigger = atmel_classd_codec_dai_trigger,
489 #define ATMEL_CLASSD_CODEC_DAI_NAME "atmel-classd-hifi"
491 static struct snd_soc_dai_driver atmel_classd_codec_dai = {
492 .name = ATMEL_CLASSD_CODEC_DAI_NAME,
493 .playback = {
494 .stream_name = "Playback",
495 .channels_min = 1,
496 .channels_max = 2,
497 .rates = ATMEL_CLASSD_RATES,
498 .formats = SNDRV_PCM_FMTBIT_S16_LE,
500 .ops = &atmel_classd_codec_dai_ops,
503 /* ASoC sound card */
504 static int atmel_classd_asoc_card_init(struct device *dev,
505 struct snd_soc_card *card)
507 struct snd_soc_dai_link *dai_link;
508 struct atmel_classd *dd = snd_soc_card_get_drvdata(card);
510 dai_link = devm_kzalloc(dev, sizeof(*dai_link), GFP_KERNEL);
511 if (!dai_link)
512 return -ENOMEM;
514 dai_link->name = "CLASSD";
515 dai_link->stream_name = "CLASSD PCM";
516 dai_link->codec_dai_name = ATMEL_CLASSD_CODEC_DAI_NAME;
517 dai_link->cpu_dai_name = dev_name(dev);
518 dai_link->codec_name = dev_name(dev);
519 dai_link->platform_name = dev_name(dev);
521 card->dai_link = dai_link;
522 card->num_links = 1;
523 card->name = dd->pdata->card_name;
524 card->dev = dev;
526 return 0;
529 /* regmap configuration */
530 static const struct reg_default atmel_classd_reg_defaults[] = {
531 { CLASSD_INTPMR, 0x00301212 },
534 #define ATMEL_CLASSD_REG_MAX 0xE4
535 static const struct regmap_config atmel_classd_regmap_config = {
536 .reg_bits = 32,
537 .reg_stride = 4,
538 .val_bits = 32,
539 .max_register = ATMEL_CLASSD_REG_MAX,
541 .cache_type = REGCACHE_FLAT,
542 .reg_defaults = atmel_classd_reg_defaults,
543 .num_reg_defaults = ARRAY_SIZE(atmel_classd_reg_defaults),
546 static int atmel_classd_probe(struct platform_device *pdev)
548 struct device *dev = &pdev->dev;
549 struct atmel_classd *dd;
550 struct resource *res;
551 void __iomem *io_base;
552 const struct atmel_classd_pdata *pdata;
553 struct snd_soc_card *card;
554 int ret;
556 pdata = dev_get_platdata(dev);
557 if (!pdata) {
558 pdata = atmel_classd_dt_init(dev);
559 if (IS_ERR(pdata))
560 return PTR_ERR(pdata);
563 dd = devm_kzalloc(dev, sizeof(*dd), GFP_KERNEL);
564 if (!dd)
565 return -ENOMEM;
567 dd->pdata = pdata;
569 dd->irq = platform_get_irq(pdev, 0);
570 if (dd->irq < 0) {
571 ret = dd->irq;
572 dev_err(dev, "failed to could not get irq: %d\n", ret);
573 return ret;
576 dd->pclk = devm_clk_get(dev, "pclk");
577 if (IS_ERR(dd->pclk)) {
578 ret = PTR_ERR(dd->pclk);
579 dev_err(dev, "failed to get peripheral clock: %d\n", ret);
580 return ret;
583 dd->gclk = devm_clk_get(dev, "gclk");
584 if (IS_ERR(dd->gclk)) {
585 ret = PTR_ERR(dd->gclk);
586 dev_err(dev, "failed to get GCK clock: %d\n", ret);
587 return ret;
590 dd->aclk = devm_clk_get(dev, "aclk");
591 if (IS_ERR(dd->aclk)) {
592 ret = PTR_ERR(dd->aclk);
593 dev_err(dev, "failed to get audio clock: %d\n", ret);
594 return ret;
597 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
598 io_base = devm_ioremap_resource(dev, res);
599 if (IS_ERR(io_base)) {
600 ret = PTR_ERR(io_base);
601 dev_err(dev, "failed to remap register memory: %d\n", ret);
602 return ret;
605 dd->phy_base = res->start;
607 dd->regmap = devm_regmap_init_mmio(dev, io_base,
608 &atmel_classd_regmap_config);
609 if (IS_ERR(dd->regmap)) {
610 ret = PTR_ERR(dd->regmap);
611 dev_err(dev, "failed to init register map: %d\n", ret);
612 return ret;
615 ret = devm_snd_soc_register_component(dev,
616 &atmel_classd_cpu_dai_component,
617 &atmel_classd_cpu_dai, 1);
618 if (ret) {
619 dev_err(dev, "could not register CPU DAI: %d\n", ret);
620 return ret;
623 ret = devm_snd_dmaengine_pcm_register(dev,
624 &atmel_classd_dmaengine_pcm_config,
626 if (ret) {
627 dev_err(dev, "could not register platform: %d\n", ret);
628 return ret;
631 ret = snd_soc_register_codec(dev, &soc_codec_dev_classd,
632 &atmel_classd_codec_dai, 1);
633 if (ret) {
634 dev_err(dev, "could not register codec: %d\n", ret);
635 return ret;
638 /* register sound card */
639 card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
640 if (!card) {
641 ret = -ENOMEM;
642 goto unregister_codec;
645 snd_soc_card_set_drvdata(card, dd);
646 platform_set_drvdata(pdev, card);
648 ret = atmel_classd_asoc_card_init(dev, card);
649 if (ret) {
650 dev_err(dev, "failed to init sound card\n");
651 goto unregister_codec;
654 ret = devm_snd_soc_register_card(dev, card);
655 if (ret) {
656 dev_err(dev, "failed to register sound card: %d\n", ret);
657 goto unregister_codec;
660 return 0;
662 unregister_codec:
663 snd_soc_unregister_codec(dev);
664 return ret;
667 static int atmel_classd_remove(struct platform_device *pdev)
669 snd_soc_unregister_codec(&pdev->dev);
670 return 0;
673 static struct platform_driver atmel_classd_driver = {
674 .driver = {
675 .name = "atmel-classd",
676 .of_match_table = of_match_ptr(atmel_classd_of_match),
677 .pm = &snd_soc_pm_ops,
679 .probe = atmel_classd_probe,
680 .remove = atmel_classd_remove,
682 module_platform_driver(atmel_classd_driver);
684 MODULE_DESCRIPTION("Atmel ClassD driver under ALSA SoC architecture");
685 MODULE_AUTHOR("Songjun Wu <songjun.wu@atmel.com>");
686 MODULE_LICENSE("GPL");