1 /* 2 * ak4641.c -- AK4641 ALSA Soc Audio driver 3 * 4 * Copyright (C) 2008 Harald Welte <laforge@gnufiish.org> 5 * Copyright (C) 2011 Dmitry Artamonow <mad_soft@inbox.ru> 6 * 7 * Based on ak4535.c by Richard Purdie 8 * 9 * This program is free software; you can redistribute it and/or modify 10 * it under the terms of the GNU General Public License version 2 as 11 * published by the Free Software Foundation. 12 */ 13 14 #include <linux/module.h> 15 #include <linux/init.h> 16 #include <linux/delay.h> 17 #include <linux/gpio.h> 18 #include <linux/pm.h> 19 #include <linux/i2c.h> 20 #include <linux/regmap.h> 21 #include <linux/slab.h> 22 #include <sound/core.h> 23 #include <sound/pcm.h> 24 #include <sound/pcm_params.h> 25 #include <sound/soc.h> 26 #include <sound/initval.h> 27 #include <sound/tlv.h> 28 #include <sound/ak4641.h> 29 30 #include "ak4641.h" 31 32 /* codec private data */ 33 struct ak4641_priv { 34 struct regmap *regmap; 35 unsigned int sysclk; 36 int deemph; 37 int playback_fs; 38 }; 39 40 /* 41 * ak4641 register cache 42 */ 43 static const struct reg_default ak4641_reg_defaults[] = { 44 { 0, 0x00 }, { 1, 0x80 }, { 2, 0x00 }, { 3, 0x80 }, 45 { 4, 0x02 }, { 5, 0x00 }, { 6, 0x11 }, { 7, 0x05 }, 46 { 8, 0x00 }, { 9, 0x00 }, { 10, 0x36 }, { 11, 0x10 }, 47 { 12, 0x00 }, { 13, 0x00 }, { 14, 0x57 }, { 15, 0x00 }, 48 { 16, 0x88 }, { 17, 0x88 }, { 18, 0x08 }, { 19, 0x08 } 49 }; 50 51 static const int deemph_settings[] = {44100, 0, 48000, 32000}; 52 53 static int ak4641_set_deemph(struct snd_soc_codec *codec) 54 { 55 struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec); 56 int i, best = 0; 57 58 for (i = 0 ; i < ARRAY_SIZE(deemph_settings); i++) { 59 /* if deemphasis is on, select the nearest available rate */ 60 if (ak4641->deemph && deemph_settings[i] != 0 && 61 abs(deemph_settings[i] - ak4641->playback_fs) < 62 abs(deemph_settings[best] - ak4641->playback_fs)) 63 best = i; 64 65 if (!ak4641->deemph && deemph_settings[i] == 0) 66 best = i; 67 } 68 69 dev_dbg(codec->dev, "Set deemphasis %d\n", best); 70 71 return snd_soc_update_bits(codec, AK4641_DAC, 0x3, best); 72 } 73 74 static int ak4641_put_deemph(struct snd_kcontrol *kcontrol, 75 struct snd_ctl_elem_value *ucontrol) 76 { 77 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); 78 struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec); 79 int deemph = ucontrol->value.integer.value[0]; 80 81 if (deemph > 1) 82 return -EINVAL; 83 84 ak4641->deemph = deemph; 85 86 return ak4641_set_deemph(codec); 87 } 88 89 static int ak4641_get_deemph(struct snd_kcontrol *kcontrol, 90 struct snd_ctl_elem_value *ucontrol) 91 { 92 struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol); 93 struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec); 94 95 ucontrol->value.integer.value[0] = ak4641->deemph; 96 return 0; 97 }; 98 99 static const char *ak4641_mono_out[] = {"(L + R)/2", "Hi-Z"}; 100 static const char *ak4641_hp_out[] = {"Stereo", "Mono"}; 101 static const char *ak4641_mic_select[] = {"Internal", "External"}; 102 static const char *ak4641_mic_or_dac[] = {"Microphone", "Voice DAC"}; 103 104 105 static const DECLARE_TLV_DB_SCALE(mono_gain_tlv, -1700, 2300, 0); 106 static const DECLARE_TLV_DB_SCALE(mic_boost_tlv, 0, 2000, 0); 107 static const DECLARE_TLV_DB_SCALE(eq_tlv, -1050, 150, 0); 108 static const DECLARE_TLV_DB_SCALE(master_tlv, -12750, 50, 0); 109 static const DECLARE_TLV_DB_SCALE(mic_stereo_sidetone_tlv, -2700, 300, 0); 110 static const DECLARE_TLV_DB_SCALE(mic_mono_sidetone_tlv, -400, 400, 0); 111 static const DECLARE_TLV_DB_SCALE(capture_tlv, -800, 50, 0); 112 static const DECLARE_TLV_DB_SCALE(alc_tlv, -800, 50, 0); 113 static const DECLARE_TLV_DB_SCALE(aux_in_tlv, -2100, 300, 0); 114 115 116 static SOC_ENUM_SINGLE_DECL(ak4641_mono_out_enum, 117 AK4641_SIG1, 6, ak4641_mono_out); 118 static SOC_ENUM_SINGLE_DECL(ak4641_hp_out_enum, 119 AK4641_MODE2, 2, ak4641_hp_out); 120 static SOC_ENUM_SINGLE_DECL(ak4641_mic_select_enum, 121 AK4641_MIC, 1, ak4641_mic_select); 122 static SOC_ENUM_SINGLE_DECL(ak4641_mic_or_dac_enum, 123 AK4641_BTIF, 4, ak4641_mic_or_dac); 124 125 static const struct snd_kcontrol_new ak4641_snd_controls[] = { 126 SOC_ENUM("Mono 1 Output", ak4641_mono_out_enum), 127 SOC_SINGLE_TLV("Mono 1 Gain Volume", AK4641_SIG1, 7, 1, 1, 128 mono_gain_tlv), 129 SOC_ENUM("Headphone Output", ak4641_hp_out_enum), 130 SOC_SINGLE_BOOL_EXT("Playback Deemphasis Switch", 0, 131 ak4641_get_deemph, ak4641_put_deemph), 132 133 SOC_SINGLE_TLV("Mic Boost Volume", AK4641_MIC, 0, 1, 0, mic_boost_tlv), 134 135 SOC_SINGLE("ALC Operation Time", AK4641_TIMER, 0, 3, 0), 136 SOC_SINGLE("ALC Recovery Time", AK4641_TIMER, 2, 3, 0), 137 SOC_SINGLE("ALC ZC Time", AK4641_TIMER, 4, 3, 0), 138 139 SOC_SINGLE("ALC 1 Switch", AK4641_ALC1, 5, 1, 0), 140 141 SOC_SINGLE_TLV("ALC Volume", AK4641_ALC2, 0, 71, 0, alc_tlv), 142 SOC_SINGLE("Left Out Enable Switch", AK4641_SIG2, 1, 1, 0), 143 SOC_SINGLE("Right Out Enable Switch", AK4641_SIG2, 0, 1, 0), 144 145 SOC_SINGLE_TLV("Capture Volume", AK4641_PGA, 0, 71, 0, capture_tlv), 146 147 SOC_DOUBLE_R_TLV("Master Playback Volume", AK4641_LATT, 148 AK4641_RATT, 0, 255, 1, master_tlv), 149 150 SOC_SINGLE_TLV("AUX In Volume", AK4641_VOL, 0, 15, 0, aux_in_tlv), 151 152 SOC_SINGLE("Equalizer Switch", AK4641_DAC, 2, 1, 0), 153 SOC_SINGLE_TLV("EQ1 100 Hz Volume", AK4641_EQLO, 0, 15, 1, eq_tlv), 154 SOC_SINGLE_TLV("EQ2 250 Hz Volume", AK4641_EQLO, 4, 15, 1, eq_tlv), 155 SOC_SINGLE_TLV("EQ3 1 kHz Volume", AK4641_EQMID, 0, 15, 1, eq_tlv), 156 SOC_SINGLE_TLV("EQ4 3.5 kHz Volume", AK4641_EQMID, 4, 15, 1, eq_tlv), 157 SOC_SINGLE_TLV("EQ5 10 kHz Volume", AK4641_EQHI, 0, 15, 1, eq_tlv), 158 }; 159 160 /* Mono 1 Mixer */ 161 static const struct snd_kcontrol_new ak4641_mono1_mixer_controls[] = { 162 SOC_DAPM_SINGLE_TLV("Mic Mono Sidetone Volume", AK4641_VOL, 7, 1, 0, 163 mic_mono_sidetone_tlv), 164 SOC_DAPM_SINGLE("Mic Mono Sidetone Switch", AK4641_SIG1, 4, 1, 0), 165 SOC_DAPM_SINGLE("Mono Playback Switch", AK4641_SIG1, 5, 1, 0), 166 }; 167 168 /* Stereo Mixer */ 169 static const struct snd_kcontrol_new ak4641_stereo_mixer_controls[] = { 170 SOC_DAPM_SINGLE_TLV("Mic Sidetone Volume", AK4641_VOL, 4, 7, 0, 171 mic_stereo_sidetone_tlv), 172 SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4641_SIG2, 4, 1, 0), 173 SOC_DAPM_SINGLE("Playback Switch", AK4641_SIG2, 7, 1, 0), 174 SOC_DAPM_SINGLE("Aux Bypass Switch", AK4641_SIG2, 5, 1, 0), 175 }; 176 177 /* Input Mixer */ 178 static const struct snd_kcontrol_new ak4641_input_mixer_controls[] = { 179 SOC_DAPM_SINGLE("Mic Capture Switch", AK4641_MIC, 2, 1, 0), 180 SOC_DAPM_SINGLE("Aux Capture Switch", AK4641_MIC, 5, 1, 0), 181 }; 182 183 /* Mic mux */ 184 static const struct snd_kcontrol_new ak4641_mic_mux_control = 185 SOC_DAPM_ENUM("Mic Select", ak4641_mic_select_enum); 186 187 /* Input mux */ 188 static const struct snd_kcontrol_new ak4641_input_mux_control = 189 SOC_DAPM_ENUM("Input Select", ak4641_mic_or_dac_enum); 190 191 /* mono 2 switch */ 192 static const struct snd_kcontrol_new ak4641_mono2_control = 193 SOC_DAPM_SINGLE("Switch", AK4641_SIG1, 0, 1, 0); 194 195 /* ak4641 dapm widgets */ 196 static const struct snd_soc_dapm_widget ak4641_dapm_widgets[] = { 197 SND_SOC_DAPM_MIXER("Stereo Mixer", SND_SOC_NOPM, 0, 0, 198 &ak4641_stereo_mixer_controls[0], 199 ARRAY_SIZE(ak4641_stereo_mixer_controls)), 200 SND_SOC_DAPM_MIXER("Mono1 Mixer", SND_SOC_NOPM, 0, 0, 201 &ak4641_mono1_mixer_controls[0], 202 ARRAY_SIZE(ak4641_mono1_mixer_controls)), 203 SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0, 204 &ak4641_input_mixer_controls[0], 205 ARRAY_SIZE(ak4641_input_mixer_controls)), 206 SND_SOC_DAPM_MUX("Mic Mux", SND_SOC_NOPM, 0, 0, 207 &ak4641_mic_mux_control), 208 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, 209 &ak4641_input_mux_control), 210 SND_SOC_DAPM_SWITCH("Mono 2 Enable", SND_SOC_NOPM, 0, 0, 211 &ak4641_mono2_control), 212 213 SND_SOC_DAPM_OUTPUT("LOUT"), 214 SND_SOC_DAPM_OUTPUT("ROUT"), 215 SND_SOC_DAPM_OUTPUT("MOUT1"), 216 SND_SOC_DAPM_OUTPUT("MOUT2"), 217 SND_SOC_DAPM_OUTPUT("MICOUT"), 218 219 SND_SOC_DAPM_ADC("ADC", "HiFi Capture", AK4641_PM1, 0, 0), 220 SND_SOC_DAPM_PGA("Mic", AK4641_PM1, 1, 0, NULL, 0), 221 SND_SOC_DAPM_PGA("AUX In", AK4641_PM1, 2, 0, NULL, 0), 222 SND_SOC_DAPM_PGA("Mono Out", AK4641_PM1, 3, 0, NULL, 0), 223 SND_SOC_DAPM_PGA("Line Out", AK4641_PM1, 4, 0, NULL, 0), 224 225 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", AK4641_PM2, 0, 0), 226 SND_SOC_DAPM_PGA("Mono Out 2", AK4641_PM2, 3, 0, NULL, 0), 227 228 SND_SOC_DAPM_ADC("Voice ADC", "Voice Capture", AK4641_BTIF, 0, 0), 229 SND_SOC_DAPM_DAC("Voice DAC", "Voice Playback", AK4641_BTIF, 1, 0), 230 231 SND_SOC_DAPM_MICBIAS("Mic Int Bias", AK4641_MIC, 3, 0), 232 SND_SOC_DAPM_MICBIAS("Mic Ext Bias", AK4641_MIC, 4, 0), 233 234 SND_SOC_DAPM_INPUT("MICIN"), 235 SND_SOC_DAPM_INPUT("MICEXT"), 236 SND_SOC_DAPM_INPUT("AUX"), 237 SND_SOC_DAPM_INPUT("AIN"), 238 }; 239 240 static const struct snd_soc_dapm_route ak4641_audio_map[] = { 241 /* Stereo Mixer */ 242 {"Stereo Mixer", "Playback Switch", "DAC"}, 243 {"Stereo Mixer", "Mic Sidetone Switch", "Input Mux"}, 244 {"Stereo Mixer", "Aux Bypass Switch", "AUX In"}, 245 246 /* Mono 1 Mixer */ 247 {"Mono1 Mixer", "Mic Mono Sidetone Switch", "Input Mux"}, 248 {"Mono1 Mixer", "Mono Playback Switch", "DAC"}, 249 250 /* Mic */ 251 {"Mic", NULL, "AIN"}, 252 {"Mic Mux", "Internal", "Mic Int Bias"}, 253 {"Mic Mux", "External", "Mic Ext Bias"}, 254 {"Mic Int Bias", NULL, "MICIN"}, 255 {"Mic Ext Bias", NULL, "MICEXT"}, 256 {"MICOUT", NULL, "Mic Mux"}, 257 258 /* Input Mux */ 259 {"Input Mux", "Microphone", "Mic"}, 260 {"Input Mux", "Voice DAC", "Voice DAC"}, 261 262 /* Line Out */ 263 {"LOUT", NULL, "Line Out"}, 264 {"ROUT", NULL, "Line Out"}, 265 {"Line Out", NULL, "Stereo Mixer"}, 266 267 /* Mono 1 Out */ 268 {"MOUT1", NULL, "Mono Out"}, 269 {"Mono Out", NULL, "Mono1 Mixer"}, 270 271 /* Mono 2 Out */ 272 {"MOUT2", NULL, "Mono 2 Enable"}, 273 {"Mono 2 Enable", "Switch", "Mono Out 2"}, 274 {"Mono Out 2", NULL, "Stereo Mixer"}, 275 276 {"Voice ADC", NULL, "Mono 2 Enable"}, 277 278 /* Aux In */ 279 {"AUX In", NULL, "AUX"}, 280 281 /* ADC */ 282 {"ADC", NULL, "Input Mixer"}, 283 {"Input Mixer", "Mic Capture Switch", "Mic"}, 284 {"Input Mixer", "Aux Capture Switch", "AUX In"}, 285 }; 286 287 static int ak4641_set_dai_sysclk(struct snd_soc_dai *codec_dai, 288 int clk_id, unsigned int freq, int dir) 289 { 290 struct snd_soc_codec *codec = codec_dai->codec; 291 struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec); 292 293 ak4641->sysclk = freq; 294 return 0; 295 } 296 297 static int ak4641_i2s_hw_params(struct snd_pcm_substream *substream, 298 struct snd_pcm_hw_params *params, 299 struct snd_soc_dai *dai) 300 { 301 struct snd_soc_codec *codec = dai->codec; 302 struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec); 303 int rate = params_rate(params), fs = 256; 304 u8 mode2; 305 306 if (rate) 307 fs = ak4641->sysclk / rate; 308 else 309 return -EINVAL; 310 311 /* set fs */ 312 switch (fs) { 313 case 1024: 314 mode2 = (0x2 << 5); 315 break; 316 case 512: 317 mode2 = (0x1 << 5); 318 break; 319 case 256: 320 mode2 = (0x0 << 5); 321 break; 322 default: 323 dev_err(codec->dev, "Error: unsupported fs=%d\n", fs); 324 return -EINVAL; 325 } 326 327 snd_soc_update_bits(codec, AK4641_MODE2, (0x3 << 5), mode2); 328 329 /* Update de-emphasis filter for the new rate */ 330 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { 331 ak4641->playback_fs = rate; 332 ak4641_set_deemph(codec); 333 } 334 335 return 0; 336 } 337 338 static int ak4641_pcm_set_dai_fmt(struct snd_soc_dai *codec_dai, 339 unsigned int fmt) 340 { 341 struct snd_soc_codec *codec = codec_dai->codec; 342 u8 btif; 343 int ret; 344 345 /* interface format */ 346 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 347 case SND_SOC_DAIFMT_I2S: 348 btif = (0x3 << 5); 349 break; 350 case SND_SOC_DAIFMT_LEFT_J: 351 btif = (0x2 << 5); 352 break; 353 case SND_SOC_DAIFMT_DSP_A: /* MSB after FRM */ 354 btif = (0x0 << 5); 355 break; 356 case SND_SOC_DAIFMT_DSP_B: /* MSB during FRM */ 357 btif = (0x1 << 5); 358 break; 359 default: 360 return -EINVAL; 361 } 362 363 ret = snd_soc_update_bits(codec, AK4641_BTIF, (0x3 << 5), btif); 364 if (ret < 0) 365 return ret; 366 367 return 0; 368 } 369 370 static int ak4641_i2s_set_dai_fmt(struct snd_soc_dai *codec_dai, 371 unsigned int fmt) 372 { 373 struct snd_soc_codec *codec = codec_dai->codec; 374 u8 mode1 = 0; 375 376 /* interface format */ 377 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 378 case SND_SOC_DAIFMT_I2S: 379 mode1 = 0x02; 380 break; 381 case SND_SOC_DAIFMT_LEFT_J: 382 mode1 = 0x01; 383 break; 384 default: 385 return -EINVAL; 386 } 387 388 return snd_soc_write(codec, AK4641_MODE1, mode1); 389 } 390 391 static int ak4641_mute(struct snd_soc_dai *dai, int mute) 392 { 393 struct snd_soc_codec *codec = dai->codec; 394 395 return snd_soc_update_bits(codec, AK4641_DAC, 0x20, mute ? 0x20 : 0); 396 } 397 398 static int ak4641_set_bias_level(struct snd_soc_codec *codec, 399 enum snd_soc_bias_level level) 400 { 401 struct ak4641_priv *ak4641 = snd_soc_codec_get_drvdata(codec); 402 struct ak4641_platform_data *pdata = codec->dev->platform_data; 403 int ret; 404 405 switch (level) { 406 case SND_SOC_BIAS_ON: 407 /* unmute */ 408 snd_soc_update_bits(codec, AK4641_DAC, 0x20, 0); 409 break; 410 case SND_SOC_BIAS_PREPARE: 411 /* mute */ 412 snd_soc_update_bits(codec, AK4641_DAC, 0x20, 0x20); 413 break; 414 case SND_SOC_BIAS_STANDBY: 415 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF) { 416 if (pdata && gpio_is_valid(pdata->gpio_power)) 417 gpio_set_value(pdata->gpio_power, 1); 418 mdelay(1); 419 if (pdata && gpio_is_valid(pdata->gpio_npdn)) 420 gpio_set_value(pdata->gpio_npdn, 1); 421 mdelay(1); 422 423 ret = regcache_sync(ak4641->regmap); 424 if (ret) { 425 dev_err(codec->dev, 426 "Failed to sync cache: %d\n", ret); 427 return ret; 428 } 429 } 430 snd_soc_update_bits(codec, AK4641_PM1, 0x80, 0x80); 431 snd_soc_update_bits(codec, AK4641_PM2, 0x80, 0); 432 break; 433 case SND_SOC_BIAS_OFF: 434 snd_soc_update_bits(codec, AK4641_PM1, 0x80, 0); 435 if (pdata && gpio_is_valid(pdata->gpio_npdn)) 436 gpio_set_value(pdata->gpio_npdn, 0); 437 if (pdata && gpio_is_valid(pdata->gpio_power)) 438 gpio_set_value(pdata->gpio_power, 0); 439 regcache_mark_dirty(ak4641->regmap); 440 break; 441 } 442 return 0; 443 } 444 445 #define AK4641_RATES (SNDRV_PCM_RATE_8000_48000) 446 #define AK4641_RATES_BT (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ 447 SNDRV_PCM_RATE_16000) 448 #define AK4641_FORMATS (SNDRV_PCM_FMTBIT_S16_LE) 449 450 static const struct snd_soc_dai_ops ak4641_i2s_dai_ops = { 451 .hw_params = ak4641_i2s_hw_params, 452 .set_fmt = ak4641_i2s_set_dai_fmt, 453 .digital_mute = ak4641_mute, 454 .set_sysclk = ak4641_set_dai_sysclk, 455 }; 456 457 static const struct snd_soc_dai_ops ak4641_pcm_dai_ops = { 458 .hw_params = NULL, /* rates are controlled by BT chip */ 459 .set_fmt = ak4641_pcm_set_dai_fmt, 460 .digital_mute = ak4641_mute, 461 .set_sysclk = ak4641_set_dai_sysclk, 462 }; 463 464 static struct snd_soc_dai_driver ak4641_dai[] = { 465 { 466 .name = "ak4641-hifi", 467 .id = 1, 468 .playback = { 469 .stream_name = "HiFi Playback", 470 .channels_min = 1, 471 .channels_max = 2, 472 .rates = AK4641_RATES, 473 .formats = AK4641_FORMATS, 474 }, 475 .capture = { 476 .stream_name = "HiFi Capture", 477 .channels_min = 1, 478 .channels_max = 2, 479 .rates = AK4641_RATES, 480 .formats = AK4641_FORMATS, 481 }, 482 .ops = &ak4641_i2s_dai_ops, 483 .symmetric_rates = 1, 484 }, 485 { 486 .name = "ak4641-voice", 487 .id = 1, 488 .playback = { 489 .stream_name = "Voice Playback", 490 .channels_min = 1, 491 .channels_max = 1, 492 .rates = AK4641_RATES_BT, 493 .formats = AK4641_FORMATS, 494 }, 495 .capture = { 496 .stream_name = "Voice Capture", 497 .channels_min = 1, 498 .channels_max = 1, 499 .rates = AK4641_RATES_BT, 500 .formats = AK4641_FORMATS, 501 }, 502 .ops = &ak4641_pcm_dai_ops, 503 .symmetric_rates = 1, 504 }, 505 }; 506 507 static struct snd_soc_codec_driver soc_codec_dev_ak4641 = { 508 .controls = ak4641_snd_controls, 509 .num_controls = ARRAY_SIZE(ak4641_snd_controls), 510 .dapm_widgets = ak4641_dapm_widgets, 511 .num_dapm_widgets = ARRAY_SIZE(ak4641_dapm_widgets), 512 .dapm_routes = ak4641_audio_map, 513 .num_dapm_routes = ARRAY_SIZE(ak4641_audio_map), 514 .set_bias_level = ak4641_set_bias_level, 515 .suspend_bias_off = true, 516 }; 517 518 static const struct regmap_config ak4641_regmap = { 519 .reg_bits = 8, 520 .val_bits = 8, 521 522 .max_register = AK4641_BTIF, 523 .reg_defaults = ak4641_reg_defaults, 524 .num_reg_defaults = ARRAY_SIZE(ak4641_reg_defaults), 525 .cache_type = REGCACHE_RBTREE, 526 }; 527 528 static int ak4641_i2c_probe(struct i2c_client *i2c, 529 const struct i2c_device_id *id) 530 { 531 struct ak4641_platform_data *pdata = i2c->dev.platform_data; 532 struct ak4641_priv *ak4641; 533 int ret; 534 535 ak4641 = devm_kzalloc(&i2c->dev, sizeof(struct ak4641_priv), 536 GFP_KERNEL); 537 if (!ak4641) 538 return -ENOMEM; 539 540 ak4641->regmap = devm_regmap_init_i2c(i2c, &ak4641_regmap); 541 if (IS_ERR(ak4641->regmap)) 542 return PTR_ERR(ak4641->regmap); 543 544 if (pdata) { 545 if (gpio_is_valid(pdata->gpio_power)) { 546 ret = gpio_request_one(pdata->gpio_power, 547 GPIOF_OUT_INIT_LOW, "ak4641 power"); 548 if (ret) 549 goto err_out; 550 } 551 if (gpio_is_valid(pdata->gpio_npdn)) { 552 ret = gpio_request_one(pdata->gpio_npdn, 553 GPIOF_OUT_INIT_LOW, "ak4641 npdn"); 554 if (ret) 555 goto err_gpio; 556 557 udelay(1); /* > 150 ns */ 558 gpio_set_value(pdata->gpio_npdn, 1); 559 } 560 } 561 562 i2c_set_clientdata(i2c, ak4641); 563 564 ret = snd_soc_register_codec(&i2c->dev, &soc_codec_dev_ak4641, 565 ak4641_dai, ARRAY_SIZE(ak4641_dai)); 566 if (ret != 0) 567 goto err_gpio2; 568 569 return 0; 570 571 err_gpio2: 572 if (pdata) { 573 if (gpio_is_valid(pdata->gpio_power)) 574 gpio_set_value(pdata->gpio_power, 0); 575 if (gpio_is_valid(pdata->gpio_npdn)) 576 gpio_free(pdata->gpio_npdn); 577 } 578 err_gpio: 579 if (pdata && gpio_is_valid(pdata->gpio_power)) 580 gpio_free(pdata->gpio_power); 581 err_out: 582 return ret; 583 } 584 585 static int ak4641_i2c_remove(struct i2c_client *i2c) 586 { 587 struct ak4641_platform_data *pdata = i2c->dev.platform_data; 588 589 snd_soc_unregister_codec(&i2c->dev); 590 591 if (pdata) { 592 if (gpio_is_valid(pdata->gpio_power)) { 593 gpio_set_value(pdata->gpio_power, 0); 594 gpio_free(pdata->gpio_power); 595 } 596 if (gpio_is_valid(pdata->gpio_npdn)) 597 gpio_free(pdata->gpio_npdn); 598 } 599 600 return 0; 601 } 602 603 static const struct i2c_device_id ak4641_i2c_id[] = { 604 { "ak4641", 0 }, 605 { } 606 }; 607 MODULE_DEVICE_TABLE(i2c, ak4641_i2c_id); 608 609 static struct i2c_driver ak4641_i2c_driver = { 610 .driver = { 611 .name = "ak4641", 612 }, 613 .probe = ak4641_i2c_probe, 614 .remove = ak4641_i2c_remove, 615 .id_table = ak4641_i2c_id, 616 }; 617 618 module_i2c_driver(ak4641_i2c_driver); 619 620 MODULE_DESCRIPTION("SoC AK4641 driver"); 621 MODULE_AUTHOR("Harald Welte <laforge@gnufiish.org>"); 622 MODULE_LICENSE("GPL"); 623