1 // SPDX-License-Identifier: GPL-2.0-or-later 2 /* Atmel ALSA SoC Audio Class D Amplifier (CLASSD) driver 3 * 4 * Copyright (C) 2015 Atmel 5 * 6 * Author: Songjun Wu <songjun.wu@atmel.com> 7 */ 8 9 #include <linux/of.h> 10 #include <linux/clk.h> 11 #include <linux/module.h> 12 #include <linux/platform_device.h> 13 #include <linux/regmap.h> 14 #include <sound/core.h> 15 #include <sound/dmaengine_pcm.h> 16 #include <sound/pcm_params.h> 17 #include <sound/tlv.h> 18 #include "atmel-classd.h" 19 20 struct atmel_classd_pdata { 21 bool non_overlap_enable; 22 int non_overlap_time; 23 int pwm_type; 24 const char *card_name; 25 }; 26 27 struct atmel_classd { 28 dma_addr_t phy_base; 29 struct regmap *regmap; 30 struct clk *pclk; 31 struct clk *gclk; 32 struct device *dev; 33 int irq; 34 const struct atmel_classd_pdata *pdata; 35 }; 36 37 #ifdef CONFIG_OF 38 static const struct of_device_id atmel_classd_of_match[] = { 39 { 40 .compatible = "atmel,sama5d2-classd", 41 }, { 42 /* sentinel */ 43 } 44 }; 45 MODULE_DEVICE_TABLE(of, atmel_classd_of_match); 46 47 static struct atmel_classd_pdata *atmel_classd_dt_init(struct device *dev) 48 { 49 struct device_node *np = dev->of_node; 50 struct atmel_classd_pdata *pdata; 51 const char *pwm_type; 52 int ret; 53 54 if (!np) { 55 dev_err(dev, "device node not found\n"); 56 return ERR_PTR(-EINVAL); 57 } 58 59 pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL); 60 if (!pdata) 61 return ERR_PTR(-ENOMEM); 62 63 ret = of_property_read_string(np, "atmel,pwm-type", &pwm_type); 64 if ((ret == 0) && (strcmp(pwm_type, "diff") == 0)) 65 pdata->pwm_type = CLASSD_MR_PWMTYP_DIFF; 66 else 67 pdata->pwm_type = CLASSD_MR_PWMTYP_SINGLE; 68 69 ret = of_property_read_u32(np, 70 "atmel,non-overlap-time", &pdata->non_overlap_time); 71 if (ret) 72 pdata->non_overlap_enable = false; 73 else 74 pdata->non_overlap_enable = true; 75 76 ret = of_property_read_string(np, "atmel,model", &pdata->card_name); 77 if (ret) 78 pdata->card_name = "CLASSD"; 79 80 return pdata; 81 } 82 #else 83 static inline struct atmel_classd_pdata * 84 atmel_classd_dt_init(struct device *dev) 85 { 86 return ERR_PTR(-EINVAL); 87 } 88 #endif 89 90 #define ATMEL_CLASSD_RATES (SNDRV_PCM_RATE_8000 \ 91 | SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 \ 92 | SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 \ 93 | SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 \ 94 | SNDRV_PCM_RATE_96000) 95 96 static const struct snd_pcm_hardware atmel_classd_hw = { 97 .info = SNDRV_PCM_INFO_MMAP 98 | SNDRV_PCM_INFO_MMAP_VALID 99 | SNDRV_PCM_INFO_INTERLEAVED 100 | SNDRV_PCM_INFO_RESUME 101 | SNDRV_PCM_INFO_PAUSE, 102 .formats = (SNDRV_PCM_FMTBIT_S16_LE), 103 .rates = ATMEL_CLASSD_RATES, 104 .rate_min = 8000, 105 .rate_max = 96000, 106 .channels_min = 1, 107 .channels_max = 2, 108 .buffer_bytes_max = 64 * 1024, 109 .period_bytes_min = 256, 110 .period_bytes_max = 32 * 1024, 111 .periods_min = 2, 112 .periods_max = 256, 113 }; 114 115 #define ATMEL_CLASSD_PREALLOC_BUF_SIZE (64 * 1024) 116 117 /* cpu dai component */ 118 static int atmel_classd_cpu_dai_startup(struct snd_pcm_substream *substream, 119 struct snd_soc_dai *cpu_dai) 120 { 121 struct snd_soc_pcm_runtime *rtd = substream->private_data; 122 struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card); 123 124 regmap_write(dd->regmap, CLASSD_THR, 0x0); 125 126 return clk_prepare_enable(dd->pclk); 127 } 128 129 static void atmel_classd_cpu_dai_shutdown(struct snd_pcm_substream *substream, 130 struct snd_soc_dai *cpu_dai) 131 { 132 struct snd_soc_pcm_runtime *rtd = substream->private_data; 133 struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card); 134 135 clk_disable_unprepare(dd->pclk); 136 } 137 138 static const struct snd_soc_dai_ops atmel_classd_cpu_dai_ops = { 139 .startup = atmel_classd_cpu_dai_startup, 140 .shutdown = atmel_classd_cpu_dai_shutdown, 141 }; 142 143 static struct snd_soc_dai_driver atmel_classd_cpu_dai = { 144 .playback = { 145 .channels_min = 1, 146 .channels_max = 2, 147 .rates = ATMEL_CLASSD_RATES, 148 .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 149 .ops = &atmel_classd_cpu_dai_ops, 150 }; 151 152 static const struct snd_soc_component_driver atmel_classd_cpu_dai_component = { 153 .name = "atmel-classd", 154 }; 155 156 /* platform */ 157 static int 158 atmel_classd_platform_configure_dma(struct snd_pcm_substream *substream, 159 struct snd_pcm_hw_params *params, 160 struct dma_slave_config *slave_config) 161 { 162 struct snd_soc_pcm_runtime *rtd = substream->private_data; 163 struct atmel_classd *dd = snd_soc_card_get_drvdata(rtd->card); 164 165 if (params_physical_width(params) != 16) { 166 dev_err(dd->dev, 167 "only supports 16-bit audio data\n"); 168 return -EINVAL; 169 } 170 171 if (params_channels(params) == 1) 172 slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_2_BYTES; 173 else 174 slave_config->dst_addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES; 175 176 slave_config->direction = DMA_MEM_TO_DEV; 177 slave_config->dst_addr = dd->phy_base + CLASSD_THR; 178 slave_config->dst_maxburst = 1; 179 slave_config->src_maxburst = 1; 180 slave_config->device_fc = false; 181 182 return 0; 183 } 184 185 static const struct snd_dmaengine_pcm_config 186 atmel_classd_dmaengine_pcm_config = { 187 .prepare_slave_config = atmel_classd_platform_configure_dma, 188 .pcm_hardware = &atmel_classd_hw, 189 .prealloc_buffer_size = ATMEL_CLASSD_PREALLOC_BUF_SIZE, 190 }; 191 192 /* codec */ 193 static const char * const mono_mode_text[] = { 194 "mix", "sat", "left", "right" 195 }; 196 197 static SOC_ENUM_SINGLE_DECL(classd_mono_mode_enum, 198 CLASSD_INTPMR, CLASSD_INTPMR_MONO_MODE_SHIFT, 199 mono_mode_text); 200 201 static const char * const eqcfg_text[] = { 202 "Treble-12dB", "Treble-6dB", 203 "Medium-8dB", "Medium-3dB", 204 "Bass-12dB", "Bass-6dB", 205 "0 dB", 206 "Bass+6dB", "Bass+12dB", 207 "Medium+3dB", "Medium+8dB", 208 "Treble+6dB", "Treble+12dB", 209 }; 210 211 static const unsigned int eqcfg_value[] = { 212 CLASSD_INTPMR_EQCFG_T_CUT_12, CLASSD_INTPMR_EQCFG_T_CUT_6, 213 CLASSD_INTPMR_EQCFG_M_CUT_8, CLASSD_INTPMR_EQCFG_M_CUT_3, 214 CLASSD_INTPMR_EQCFG_B_CUT_12, CLASSD_INTPMR_EQCFG_B_CUT_6, 215 CLASSD_INTPMR_EQCFG_FLAT, 216 CLASSD_INTPMR_EQCFG_B_BOOST_6, CLASSD_INTPMR_EQCFG_B_BOOST_12, 217 CLASSD_INTPMR_EQCFG_M_BOOST_3, CLASSD_INTPMR_EQCFG_M_BOOST_8, 218 CLASSD_INTPMR_EQCFG_T_BOOST_6, CLASSD_INTPMR_EQCFG_T_BOOST_12, 219 }; 220 221 static SOC_VALUE_ENUM_SINGLE_DECL(classd_eqcfg_enum, 222 CLASSD_INTPMR, CLASSD_INTPMR_EQCFG_SHIFT, 0xf, 223 eqcfg_text, eqcfg_value); 224 225 static const DECLARE_TLV_DB_SCALE(classd_digital_tlv, -7800, 100, 1); 226 227 static const struct snd_kcontrol_new atmel_classd_snd_controls[] = { 228 SOC_DOUBLE_TLV("Playback Volume", CLASSD_INTPMR, 229 CLASSD_INTPMR_ATTL_SHIFT, CLASSD_INTPMR_ATTR_SHIFT, 230 78, 1, classd_digital_tlv), 231 232 SOC_SINGLE("Deemphasis Switch", CLASSD_INTPMR, 233 CLASSD_INTPMR_DEEMP_SHIFT, 1, 0), 234 235 SOC_SINGLE("Mono Switch", CLASSD_INTPMR, CLASSD_INTPMR_MONO_SHIFT, 1, 0), 236 237 SOC_SINGLE("Swap Switch", CLASSD_INTPMR, CLASSD_INTPMR_SWAP_SHIFT, 1, 0), 238 239 SOC_ENUM("Mono Mode", classd_mono_mode_enum), 240 241 SOC_ENUM("EQ", classd_eqcfg_enum), 242 }; 243 244 static const char * const pwm_type[] = { 245 "Single ended", "Differential" 246 }; 247 248 static int atmel_classd_component_probe(struct snd_soc_component *component) 249 { 250 struct snd_soc_card *card = snd_soc_component_get_drvdata(component); 251 struct atmel_classd *dd = snd_soc_card_get_drvdata(card); 252 const struct atmel_classd_pdata *pdata = dd->pdata; 253 u32 mask, val; 254 255 mask = CLASSD_MR_PWMTYP_MASK; 256 val = pdata->pwm_type << CLASSD_MR_PWMTYP_SHIFT; 257 258 mask |= CLASSD_MR_NON_OVERLAP_MASK; 259 if (pdata->non_overlap_enable) { 260 val |= (CLASSD_MR_NON_OVERLAP_EN 261 << CLASSD_MR_NON_OVERLAP_SHIFT); 262 263 mask |= CLASSD_MR_NOVR_VAL_MASK; 264 switch (pdata->non_overlap_time) { 265 case 5: 266 val |= (CLASSD_MR_NOVR_VAL_5NS 267 << CLASSD_MR_NOVR_VAL_SHIFT); 268 break; 269 case 10: 270 val |= (CLASSD_MR_NOVR_VAL_10NS 271 << CLASSD_MR_NOVR_VAL_SHIFT); 272 break; 273 case 15: 274 val |= (CLASSD_MR_NOVR_VAL_15NS 275 << CLASSD_MR_NOVR_VAL_SHIFT); 276 break; 277 case 20: 278 val |= (CLASSD_MR_NOVR_VAL_20NS 279 << CLASSD_MR_NOVR_VAL_SHIFT); 280 break; 281 default: 282 val |= (CLASSD_MR_NOVR_VAL_10NS 283 << CLASSD_MR_NOVR_VAL_SHIFT); 284 dev_warn(component->dev, 285 "non-overlapping value %d is invalid, the default value 10 is specified\n", 286 pdata->non_overlap_time); 287 break; 288 } 289 } 290 291 snd_soc_component_update_bits(component, CLASSD_MR, mask, val); 292 293 dev_info(component->dev, 294 "PWM modulation type is %s, non-overlapping is %s\n", 295 pwm_type[pdata->pwm_type], 296 pdata->non_overlap_enable?"enabled":"disabled"); 297 298 return 0; 299 } 300 301 static int atmel_classd_component_resume(struct snd_soc_component *component) 302 { 303 struct snd_soc_card *card = snd_soc_component_get_drvdata(component); 304 struct atmel_classd *dd = snd_soc_card_get_drvdata(card); 305 306 return regcache_sync(dd->regmap); 307 } 308 309 static struct snd_soc_component_driver soc_component_dev_classd = { 310 .probe = atmel_classd_component_probe, 311 .resume = atmel_classd_component_resume, 312 .controls = atmel_classd_snd_controls, 313 .num_controls = ARRAY_SIZE(atmel_classd_snd_controls), 314 .idle_bias_on = 1, 315 .use_pmdown_time = 1, 316 .endianness = 1, 317 .non_legacy_dai_naming = 1, 318 }; 319 320 /* codec dai component */ 321 static 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 } 329 330 static int atmel_classd_codec_dai_digital_mute(struct snd_soc_dai *codec_dai, 331 int mute) 332 { 333 struct snd_soc_component *component = codec_dai->component; 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_component_update_bits(component, 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) 350 351 static 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 }; 374 375 static int 376 atmel_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_component *component = codec_dai->component; 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 /* Closest match */ 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(component->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_component_update_bits(component, CLASSD_INTPMR, mask, val); 415 416 return clk_prepare_enable(dd->gclk); 417 } 418 419 static void 420 atmel_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 } 428 429 static int atmel_classd_codec_dai_prepare(struct snd_pcm_substream *substream, 430 struct snd_soc_dai *codec_dai) 431 { 432 struct snd_soc_component *component = codec_dai->component; 433 434 snd_soc_component_update_bits(component, 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 } 441 442 static 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_component *component = codec_dai->component; 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_component_update_bits(component, CLASSD_MR, mask, val); 467 468 return 0; 469 } 470 471 static 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" 481 482 static 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 /* ASoC sound card */ 495 static 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 struct snd_soc_dai_link_component *comp; 501 502 dai_link = devm_kzalloc(dev, sizeof(*dai_link), GFP_KERNEL); 503 if (!dai_link) 504 return -ENOMEM; 505 506 comp = devm_kzalloc(dev, 3 * sizeof(*comp), GFP_KERNEL); 507 if (!comp) 508 return -ENOMEM; 509 510 dai_link->cpus = &comp[0]; 511 dai_link->codecs = &comp[1]; 512 dai_link->platforms = &comp[2]; 513 514 dai_link->num_cpus = 1; 515 dai_link->num_codecs = 1; 516 dai_link->num_platforms = 1; 517 518 dai_link->name = "CLASSD"; 519 dai_link->stream_name = "CLASSD PCM"; 520 dai_link->codecs->dai_name = ATMEL_CLASSD_CODEC_DAI_NAME; 521 dai_link->cpus->dai_name = dev_name(dev); 522 dai_link->codecs->name = dev_name(dev); 523 dai_link->platforms->name = dev_name(dev); 524 525 card->dai_link = dai_link; 526 card->num_links = 1; 527 card->name = dd->pdata->card_name; 528 card->dev = dev; 529 530 return 0; 531 }; 532 533 /* regmap configuration */ 534 static const struct reg_default atmel_classd_reg_defaults[] = { 535 { CLASSD_INTPMR, 0x00301212 }, 536 }; 537 538 #define ATMEL_CLASSD_REG_MAX 0xE4 539 static const struct regmap_config atmel_classd_regmap_config = { 540 .reg_bits = 32, 541 .reg_stride = 4, 542 .val_bits = 32, 543 .max_register = ATMEL_CLASSD_REG_MAX, 544 545 .cache_type = REGCACHE_FLAT, 546 .reg_defaults = atmel_classd_reg_defaults, 547 .num_reg_defaults = ARRAY_SIZE(atmel_classd_reg_defaults), 548 }; 549 550 static int atmel_classd_probe(struct platform_device *pdev) 551 { 552 struct device *dev = &pdev->dev; 553 struct atmel_classd *dd; 554 struct resource *res; 555 void __iomem *io_base; 556 const struct atmel_classd_pdata *pdata; 557 struct snd_soc_card *card; 558 int ret; 559 560 pdata = dev_get_platdata(dev); 561 if (!pdata) { 562 pdata = atmel_classd_dt_init(dev); 563 if (IS_ERR(pdata)) 564 return PTR_ERR(pdata); 565 } 566 567 dd = devm_kzalloc(dev, sizeof(*dd), GFP_KERNEL); 568 if (!dd) 569 return -ENOMEM; 570 571 dd->pdata = pdata; 572 573 dd->irq = platform_get_irq(pdev, 0); 574 if (dd->irq < 0) 575 return dd->irq; 576 577 dd->pclk = devm_clk_get(dev, "pclk"); 578 if (IS_ERR(dd->pclk)) { 579 ret = PTR_ERR(dd->pclk); 580 dev_err(dev, "failed to get peripheral clock: %d\n", ret); 581 return ret; 582 } 583 584 dd->gclk = devm_clk_get(dev, "gclk"); 585 if (IS_ERR(dd->gclk)) { 586 ret = PTR_ERR(dd->gclk); 587 dev_err(dev, "failed to get GCK clock: %d\n", ret); 588 return ret; 589 } 590 591 res = platform_get_resource(pdev, IORESOURCE_MEM, 0); 592 io_base = devm_ioremap_resource(dev, res); 593 if (IS_ERR(io_base)) 594 return PTR_ERR(io_base); 595 596 dd->phy_base = res->start; 597 dd->dev = dev; 598 599 dd->regmap = devm_regmap_init_mmio(dev, io_base, 600 &atmel_classd_regmap_config); 601 if (IS_ERR(dd->regmap)) { 602 ret = PTR_ERR(dd->regmap); 603 dev_err(dev, "failed to init register map: %d\n", ret); 604 return ret; 605 } 606 607 ret = devm_snd_soc_register_component(dev, 608 &atmel_classd_cpu_dai_component, 609 &atmel_classd_cpu_dai, 1); 610 if (ret) { 611 dev_err(dev, "could not register CPU DAI: %d\n", ret); 612 return ret; 613 } 614 615 ret = devm_snd_dmaengine_pcm_register(dev, 616 &atmel_classd_dmaengine_pcm_config, 617 0); 618 if (ret) { 619 dev_err(dev, "could not register platform: %d\n", ret); 620 return ret; 621 } 622 623 ret = devm_snd_soc_register_component(dev, &soc_component_dev_classd, 624 &atmel_classd_codec_dai, 1); 625 if (ret) { 626 dev_err(dev, "could not register component: %d\n", ret); 627 return ret; 628 } 629 630 /* register sound card */ 631 card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL); 632 if (!card) { 633 ret = -ENOMEM; 634 goto unregister_codec; 635 } 636 637 snd_soc_card_set_drvdata(card, dd); 638 639 ret = atmel_classd_asoc_card_init(dev, card); 640 if (ret) { 641 dev_err(dev, "failed to init sound card\n"); 642 goto unregister_codec; 643 } 644 645 ret = devm_snd_soc_register_card(dev, card); 646 if (ret) { 647 dev_err(dev, "failed to register sound card: %d\n", ret); 648 goto unregister_codec; 649 } 650 651 return 0; 652 653 unregister_codec: 654 return ret; 655 } 656 657 static int atmel_classd_remove(struct platform_device *pdev) 658 { 659 return 0; 660 } 661 662 static struct platform_driver atmel_classd_driver = { 663 .driver = { 664 .name = "atmel-classd", 665 .of_match_table = of_match_ptr(atmel_classd_of_match), 666 .pm = &snd_soc_pm_ops, 667 }, 668 .probe = atmel_classd_probe, 669 .remove = atmel_classd_remove, 670 }; 671 module_platform_driver(atmel_classd_driver); 672 673 MODULE_DESCRIPTION("Atmel ClassD driver under ALSA SoC architecture"); 674 MODULE_AUTHOR("Songjun Wu <songjun.wu@atmel.com>"); 675 MODULE_LICENSE("GPL"); 676