1 /* 2 * ak4535.c -- AK4535 ALSA Soc Audio driver 3 * 4 * Copyright 2005 Openedhand Ltd. 5 * 6 * Author: Richard Purdie <richard@openedhand.com> 7 * 8 * Based on wm8753.c by Liam Girdwood 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License version 2 as 12 * published by the Free Software Foundation. 13 */ 14 15 #include <linux/module.h> 16 #include <linux/moduleparam.h> 17 #include <linux/init.h> 18 #include <linux/delay.h> 19 #include <linux/pm.h> 20 #include <linux/i2c.h> 21 #include <linux/platform_device.h> 22 #include <linux/slab.h> 23 #include <sound/core.h> 24 #include <sound/pcm.h> 25 #include <sound/pcm_params.h> 26 #include <sound/soc.h> 27 #include <sound/initval.h> 28 29 #include "ak4535.h" 30 31 #define AK4535_VERSION "0.3" 32 33 /* codec private data */ 34 struct ak4535_priv { 35 unsigned int sysclk; 36 enum snd_soc_control_type control_type; 37 void *control_data; 38 }; 39 40 /* 41 * ak4535 register cache 42 */ 43 static const u16 ak4535_reg[AK4535_CACHEREGNUM] = { 44 0x0000, 0x0080, 0x0000, 0x0003, 45 0x0002, 0x0000, 0x0011, 0x0001, 46 0x0000, 0x0040, 0x0036, 0x0010, 47 0x0000, 0x0000, 0x0057, 0x0000, 48 }; 49 50 /* 51 * read ak4535 register cache 52 */ 53 static inline unsigned int ak4535_read_reg_cache(struct snd_soc_codec *codec, 54 unsigned int reg) 55 { 56 u16 *cache = codec->reg_cache; 57 if (reg >= AK4535_CACHEREGNUM) 58 return -1; 59 return cache[reg]; 60 } 61 62 /* 63 * write ak4535 register cache 64 */ 65 static inline void ak4535_write_reg_cache(struct snd_soc_codec *codec, 66 u16 reg, unsigned int value) 67 { 68 u16 *cache = codec->reg_cache; 69 if (reg >= AK4535_CACHEREGNUM) 70 return; 71 cache[reg] = value; 72 } 73 74 /* 75 * write to the AK4535 register space 76 */ 77 static int ak4535_write(struct snd_soc_codec *codec, unsigned int reg, 78 unsigned int value) 79 { 80 u8 data[2]; 81 82 /* data is 83 * D15..D8 AK4535 register offset 84 * D7...D0 register data 85 */ 86 data[0] = reg & 0xff; 87 data[1] = value & 0xff; 88 89 ak4535_write_reg_cache(codec, reg, value); 90 if (codec->hw_write(codec->control_data, data, 2) == 2) 91 return 0; 92 else 93 return -EIO; 94 } 95 96 static int ak4535_sync(struct snd_soc_codec *codec) 97 { 98 u16 *cache = codec->reg_cache; 99 int i, r = 0; 100 101 for (i = 0; i < AK4535_CACHEREGNUM; i++) 102 r |= ak4535_write(codec, i, cache[i]); 103 104 return r; 105 }; 106 107 static const char *ak4535_mono_gain[] = {"+6dB", "-17dB"}; 108 static const char *ak4535_mono_out[] = {"(L + R)/2", "Hi-Z"}; 109 static const char *ak4535_hp_out[] = {"Stereo", "Mono"}; 110 static const char *ak4535_deemp[] = {"44.1kHz", "Off", "48kHz", "32kHz"}; 111 static const char *ak4535_mic_select[] = {"Internal", "External"}; 112 113 static const struct soc_enum ak4535_enum[] = { 114 SOC_ENUM_SINGLE(AK4535_SIG1, 7, 2, ak4535_mono_gain), 115 SOC_ENUM_SINGLE(AK4535_SIG1, 6, 2, ak4535_mono_out), 116 SOC_ENUM_SINGLE(AK4535_MODE2, 2, 2, ak4535_hp_out), 117 SOC_ENUM_SINGLE(AK4535_DAC, 0, 4, ak4535_deemp), 118 SOC_ENUM_SINGLE(AK4535_MIC, 1, 2, ak4535_mic_select), 119 }; 120 121 static const struct snd_kcontrol_new ak4535_snd_controls[] = { 122 SOC_SINGLE("ALC2 Switch", AK4535_SIG1, 1, 1, 0), 123 SOC_ENUM("Mono 1 Output", ak4535_enum[1]), 124 SOC_ENUM("Mono 1 Gain", ak4535_enum[0]), 125 SOC_ENUM("Headphone Output", ak4535_enum[2]), 126 SOC_ENUM("Playback Deemphasis", ak4535_enum[3]), 127 SOC_SINGLE("Bass Volume", AK4535_DAC, 2, 3, 0), 128 SOC_SINGLE("Mic Boost (+20dB) Switch", AK4535_MIC, 0, 1, 0), 129 SOC_ENUM("Mic Select", ak4535_enum[4]), 130 SOC_SINGLE("ALC Operation Time", AK4535_TIMER, 0, 3, 0), 131 SOC_SINGLE("ALC Recovery Time", AK4535_TIMER, 2, 3, 0), 132 SOC_SINGLE("ALC ZC Time", AK4535_TIMER, 4, 3, 0), 133 SOC_SINGLE("ALC 1 Switch", AK4535_ALC1, 5, 1, 0), 134 SOC_SINGLE("ALC 2 Switch", AK4535_ALC1, 6, 1, 0), 135 SOC_SINGLE("ALC Volume", AK4535_ALC2, 0, 127, 0), 136 SOC_SINGLE("Capture Volume", AK4535_PGA, 0, 127, 0), 137 SOC_SINGLE("Left Playback Volume", AK4535_LATT, 0, 127, 1), 138 SOC_SINGLE("Right Playback Volume", AK4535_RATT, 0, 127, 1), 139 SOC_SINGLE("AUX Bypass Volume", AK4535_VOL, 0, 15, 0), 140 SOC_SINGLE("Mic Sidetone Volume", AK4535_VOL, 4, 7, 0), 141 }; 142 143 /* Mono 1 Mixer */ 144 static const struct snd_kcontrol_new ak4535_mono1_mixer_controls[] = { 145 SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG1, 4, 1, 0), 146 SOC_DAPM_SINGLE("Mono Playback Switch", AK4535_SIG1, 5, 1, 0), 147 }; 148 149 /* Stereo Mixer */ 150 static const struct snd_kcontrol_new ak4535_stereo_mixer_controls[] = { 151 SOC_DAPM_SINGLE("Mic Sidetone Switch", AK4535_SIG2, 4, 1, 0), 152 SOC_DAPM_SINGLE("Playback Switch", AK4535_SIG2, 7, 1, 0), 153 SOC_DAPM_SINGLE("Aux Bypass Switch", AK4535_SIG2, 5, 1, 0), 154 }; 155 156 /* Input Mixer */ 157 static const struct snd_kcontrol_new ak4535_input_mixer_controls[] = { 158 SOC_DAPM_SINGLE("Mic Capture Switch", AK4535_MIC, 2, 1, 0), 159 SOC_DAPM_SINGLE("Aux Capture Switch", AK4535_MIC, 5, 1, 0), 160 }; 161 162 /* Input mux */ 163 static const struct snd_kcontrol_new ak4535_input_mux_control = 164 SOC_DAPM_ENUM("Input Select", ak4535_enum[4]); 165 166 /* HP L switch */ 167 static const struct snd_kcontrol_new ak4535_hpl_control = 168 SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 1, 1, 1); 169 170 /* HP R switch */ 171 static const struct snd_kcontrol_new ak4535_hpr_control = 172 SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 0, 1, 1); 173 174 /* mono 2 switch */ 175 static const struct snd_kcontrol_new ak4535_mono2_control = 176 SOC_DAPM_SINGLE("Switch", AK4535_SIG1, 0, 1, 0); 177 178 /* Line out switch */ 179 static const struct snd_kcontrol_new ak4535_line_control = 180 SOC_DAPM_SINGLE("Switch", AK4535_SIG2, 6, 1, 0); 181 182 /* ak4535 dapm widgets */ 183 static const struct snd_soc_dapm_widget ak4535_dapm_widgets[] = { 184 SND_SOC_DAPM_MIXER("Stereo Mixer", SND_SOC_NOPM, 0, 0, 185 &ak4535_stereo_mixer_controls[0], 186 ARRAY_SIZE(ak4535_stereo_mixer_controls)), 187 SND_SOC_DAPM_MIXER("Mono1 Mixer", SND_SOC_NOPM, 0, 0, 188 &ak4535_mono1_mixer_controls[0], 189 ARRAY_SIZE(ak4535_mono1_mixer_controls)), 190 SND_SOC_DAPM_MIXER("Input Mixer", SND_SOC_NOPM, 0, 0, 191 &ak4535_input_mixer_controls[0], 192 ARRAY_SIZE(ak4535_input_mixer_controls)), 193 SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, 194 &ak4535_input_mux_control), 195 SND_SOC_DAPM_DAC("DAC", "Playback", AK4535_PM2, 0, 0), 196 SND_SOC_DAPM_SWITCH("Mono 2 Enable", SND_SOC_NOPM, 0, 0, 197 &ak4535_mono2_control), 198 /* speaker powersave bit */ 199 SND_SOC_DAPM_PGA("Speaker Enable", AK4535_MODE2, 0, 0, NULL, 0), 200 SND_SOC_DAPM_SWITCH("Line Out Enable", SND_SOC_NOPM, 0, 0, 201 &ak4535_line_control), 202 SND_SOC_DAPM_SWITCH("Left HP Enable", SND_SOC_NOPM, 0, 0, 203 &ak4535_hpl_control), 204 SND_SOC_DAPM_SWITCH("Right HP Enable", SND_SOC_NOPM, 0, 0, 205 &ak4535_hpr_control), 206 SND_SOC_DAPM_OUTPUT("LOUT"), 207 SND_SOC_DAPM_OUTPUT("HPL"), 208 SND_SOC_DAPM_OUTPUT("ROUT"), 209 SND_SOC_DAPM_OUTPUT("HPR"), 210 SND_SOC_DAPM_OUTPUT("SPP"), 211 SND_SOC_DAPM_OUTPUT("SPN"), 212 SND_SOC_DAPM_OUTPUT("MOUT1"), 213 SND_SOC_DAPM_OUTPUT("MOUT2"), 214 SND_SOC_DAPM_OUTPUT("MICOUT"), 215 SND_SOC_DAPM_ADC("ADC", "Capture", AK4535_PM1, 0, 0), 216 SND_SOC_DAPM_PGA("Spk Amp", AK4535_PM2, 3, 0, NULL, 0), 217 SND_SOC_DAPM_PGA("HP R Amp", AK4535_PM2, 1, 0, NULL, 0), 218 SND_SOC_DAPM_PGA("HP L Amp", AK4535_PM2, 2, 0, NULL, 0), 219 SND_SOC_DAPM_PGA("Mic", AK4535_PM1, 1, 0, NULL, 0), 220 SND_SOC_DAPM_PGA("Line Out", AK4535_PM1, 4, 0, NULL, 0), 221 SND_SOC_DAPM_PGA("Mono Out", AK4535_PM1, 3, 0, NULL, 0), 222 SND_SOC_DAPM_PGA("AUX In", AK4535_PM1, 2, 0, NULL, 0), 223 224 SND_SOC_DAPM_MICBIAS("Mic Int Bias", AK4535_MIC, 3, 0), 225 SND_SOC_DAPM_MICBIAS("Mic Ext Bias", AK4535_MIC, 4, 0), 226 SND_SOC_DAPM_INPUT("MICIN"), 227 SND_SOC_DAPM_INPUT("MICEXT"), 228 SND_SOC_DAPM_INPUT("AUX"), 229 SND_SOC_DAPM_INPUT("MIN"), 230 SND_SOC_DAPM_INPUT("AIN"), 231 }; 232 233 static const struct snd_soc_dapm_route audio_map[] = { 234 /*stereo mixer */ 235 {"Stereo Mixer", "Playback Switch", "DAC"}, 236 {"Stereo Mixer", "Mic Sidetone Switch", "Mic"}, 237 {"Stereo Mixer", "Aux Bypass Switch", "AUX In"}, 238 239 /* mono1 mixer */ 240 {"Mono1 Mixer", "Mic Sidetone Switch", "Mic"}, 241 {"Mono1 Mixer", "Mono Playback Switch", "DAC"}, 242 243 /* Mic */ 244 {"Mic", NULL, "AIN"}, 245 {"Input Mux", "Internal", "Mic Int Bias"}, 246 {"Input Mux", "External", "Mic Ext Bias"}, 247 {"Mic Int Bias", NULL, "MICIN"}, 248 {"Mic Ext Bias", NULL, "MICEXT"}, 249 {"MICOUT", NULL, "Input Mux"}, 250 251 /* line out */ 252 {"LOUT", NULL, "Line Out Enable"}, 253 {"ROUT", NULL, "Line Out Enable"}, 254 {"Line Out Enable", "Switch", "Line Out"}, 255 {"Line Out", NULL, "Stereo Mixer"}, 256 257 /* mono1 out */ 258 {"MOUT1", NULL, "Mono Out"}, 259 {"Mono Out", NULL, "Mono1 Mixer"}, 260 261 /* left HP */ 262 {"HPL", NULL, "Left HP Enable"}, 263 {"Left HP Enable", "Switch", "HP L Amp"}, 264 {"HP L Amp", NULL, "Stereo Mixer"}, 265 266 /* right HP */ 267 {"HPR", NULL, "Right HP Enable"}, 268 {"Right HP Enable", "Switch", "HP R Amp"}, 269 {"HP R Amp", NULL, "Stereo Mixer"}, 270 271 /* speaker */ 272 {"SPP", NULL, "Speaker Enable"}, 273 {"SPN", NULL, "Speaker Enable"}, 274 {"Speaker Enable", "Switch", "Spk Amp"}, 275 {"Spk Amp", NULL, "MIN"}, 276 277 /* mono 2 */ 278 {"MOUT2", NULL, "Mono 2 Enable"}, 279 {"Mono 2 Enable", "Switch", "Stereo Mixer"}, 280 281 /* Aux In */ 282 {"Aux In", NULL, "AUX"}, 283 284 /* ADC */ 285 {"ADC", NULL, "Input Mixer"}, 286 {"Input Mixer", "Mic Capture Switch", "Mic"}, 287 {"Input Mixer", "Aux Capture Switch", "Aux In"}, 288 }; 289 290 static int ak4535_add_widgets(struct snd_soc_codec *codec) 291 { 292 struct snd_soc_dapm_context *dapm = &codec->dapm; 293 294 snd_soc_dapm_new_controls(dapm, ak4535_dapm_widgets, 295 ARRAY_SIZE(ak4535_dapm_widgets)); 296 snd_soc_dapm_add_routes(dapm, audio_map, ARRAY_SIZE(audio_map)); 297 298 return 0; 299 } 300 301 static int ak4535_set_dai_sysclk(struct snd_soc_dai *codec_dai, 302 int clk_id, unsigned int freq, int dir) 303 { 304 struct snd_soc_codec *codec = codec_dai->codec; 305 struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec); 306 307 ak4535->sysclk = freq; 308 return 0; 309 } 310 311 static int ak4535_hw_params(struct snd_pcm_substream *substream, 312 struct snd_pcm_hw_params *params, 313 struct snd_soc_dai *dai) 314 { 315 struct snd_soc_pcm_runtime *rtd = substream->private_data; 316 struct snd_soc_codec *codec = rtd->codec; 317 struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec); 318 u8 mode2 = ak4535_read_reg_cache(codec, AK4535_MODE2) & ~(0x3 << 5); 319 int rate = params_rate(params), fs = 256; 320 321 if (rate) 322 fs = ak4535->sysclk / rate; 323 324 /* set fs */ 325 switch (fs) { 326 case 1024: 327 mode2 |= (0x2 << 5); 328 break; 329 case 512: 330 mode2 |= (0x1 << 5); 331 break; 332 case 256: 333 break; 334 } 335 336 /* set rate */ 337 ak4535_write(codec, AK4535_MODE2, mode2); 338 return 0; 339 } 340 341 static int ak4535_set_dai_fmt(struct snd_soc_dai *codec_dai, 342 unsigned int fmt) 343 { 344 struct snd_soc_codec *codec = codec_dai->codec; 345 u8 mode1 = 0; 346 347 /* interface format */ 348 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 349 case SND_SOC_DAIFMT_I2S: 350 mode1 = 0x0002; 351 break; 352 case SND_SOC_DAIFMT_LEFT_J: 353 mode1 = 0x0001; 354 break; 355 default: 356 return -EINVAL; 357 } 358 359 /* use 32 fs for BCLK to save power */ 360 mode1 |= 0x4; 361 362 ak4535_write(codec, AK4535_MODE1, mode1); 363 return 0; 364 } 365 366 static int ak4535_mute(struct snd_soc_dai *dai, int mute) 367 { 368 struct snd_soc_codec *codec = dai->codec; 369 u16 mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC); 370 if (!mute) 371 ak4535_write(codec, AK4535_DAC, mute_reg & ~0x20); 372 else 373 ak4535_write(codec, AK4535_DAC, mute_reg | 0x20); 374 return 0; 375 } 376 377 static int ak4535_set_bias_level(struct snd_soc_codec *codec, 378 enum snd_soc_bias_level level) 379 { 380 u16 i, mute_reg; 381 382 switch (level) { 383 case SND_SOC_BIAS_ON: 384 mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC); 385 ak4535_write(codec, AK4535_DAC, mute_reg & ~0x20); 386 break; 387 case SND_SOC_BIAS_PREPARE: 388 mute_reg = ak4535_read_reg_cache(codec, AK4535_DAC); 389 ak4535_write(codec, AK4535_DAC, mute_reg | 0x20); 390 break; 391 case SND_SOC_BIAS_STANDBY: 392 i = ak4535_read_reg_cache(codec, AK4535_PM1); 393 ak4535_write(codec, AK4535_PM1, i | 0x80); 394 i = ak4535_read_reg_cache(codec, AK4535_PM2); 395 ak4535_write(codec, AK4535_PM2, i & (~0x80)); 396 break; 397 case SND_SOC_BIAS_OFF: 398 i = ak4535_read_reg_cache(codec, AK4535_PM1); 399 ak4535_write(codec, AK4535_PM1, i & (~0x80)); 400 break; 401 } 402 codec->dapm.bias_level = level; 403 return 0; 404 } 405 406 #define AK4535_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ 407 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\ 408 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000) 409 410 static struct snd_soc_dai_ops ak4535_dai_ops = { 411 .hw_params = ak4535_hw_params, 412 .set_fmt = ak4535_set_dai_fmt, 413 .digital_mute = ak4535_mute, 414 .set_sysclk = ak4535_set_dai_sysclk, 415 }; 416 417 static struct snd_soc_dai_driver ak4535_dai = { 418 .name = "ak4535-hifi", 419 .playback = { 420 .stream_name = "Playback", 421 .channels_min = 1, 422 .channels_max = 2, 423 .rates = AK4535_RATES, 424 .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 425 .capture = { 426 .stream_name = "Capture", 427 .channels_min = 1, 428 .channels_max = 2, 429 .rates = AK4535_RATES, 430 .formats = SNDRV_PCM_FMTBIT_S16_LE,}, 431 .ops = &ak4535_dai_ops, 432 }; 433 434 static int ak4535_suspend(struct snd_soc_codec *codec, pm_message_t state) 435 { 436 ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF); 437 return 0; 438 } 439 440 static int ak4535_resume(struct snd_soc_codec *codec) 441 { 442 ak4535_sync(codec); 443 ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 444 return 0; 445 } 446 447 static int ak4535_probe(struct snd_soc_codec *codec) 448 { 449 struct ak4535_priv *ak4535 = snd_soc_codec_get_drvdata(codec); 450 451 printk(KERN_INFO "AK4535 Audio Codec %s", AK4535_VERSION); 452 453 codec->control_data = ak4535->control_data; 454 455 /* power on device */ 456 ak4535_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 457 458 snd_soc_add_controls(codec, ak4535_snd_controls, 459 ARRAY_SIZE(ak4535_snd_controls)); 460 ak4535_add_widgets(codec); 461 462 return 0; 463 } 464 465 /* power down chip */ 466 static int ak4535_remove(struct snd_soc_codec *codec) 467 { 468 ak4535_set_bias_level(codec, SND_SOC_BIAS_OFF); 469 return 0; 470 } 471 472 static struct snd_soc_codec_driver soc_codec_dev_ak4535 = { 473 .probe = ak4535_probe, 474 .remove = ak4535_remove, 475 .suspend = ak4535_suspend, 476 .resume = ak4535_resume, 477 .read = ak4535_read_reg_cache, 478 .write = ak4535_write, 479 .set_bias_level = ak4535_set_bias_level, 480 .reg_cache_size = ARRAY_SIZE(ak4535_reg), 481 .reg_word_size = sizeof(u8), 482 .reg_cache_default = ak4535_reg, 483 }; 484 485 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 486 static __devinit int ak4535_i2c_probe(struct i2c_client *i2c, 487 const struct i2c_device_id *id) 488 { 489 struct ak4535_priv *ak4535; 490 int ret; 491 492 ak4535 = kzalloc(sizeof(struct ak4535_priv), GFP_KERNEL); 493 if (ak4535 == NULL) 494 return -ENOMEM; 495 496 i2c_set_clientdata(i2c, ak4535); 497 ak4535->control_data = i2c; 498 ak4535->control_type = SND_SOC_I2C; 499 500 ret = snd_soc_register_codec(&i2c->dev, 501 &soc_codec_dev_ak4535, &ak4535_dai, 1); 502 if (ret < 0) 503 kfree(ak4535); 504 return ret; 505 } 506 507 static __devexit int ak4535_i2c_remove(struct i2c_client *client) 508 { 509 snd_soc_unregister_codec(&client->dev); 510 kfree(i2c_get_clientdata(client)); 511 return 0; 512 } 513 514 static const struct i2c_device_id ak4535_i2c_id[] = { 515 { "ak4535", 0 }, 516 { } 517 }; 518 MODULE_DEVICE_TABLE(i2c, ak4535_i2c_id); 519 520 static struct i2c_driver ak4535_i2c_driver = { 521 .driver = { 522 .name = "ak4535-codec", 523 .owner = THIS_MODULE, 524 }, 525 .probe = ak4535_i2c_probe, 526 .remove = __devexit_p(ak4535_i2c_remove), 527 .id_table = ak4535_i2c_id, 528 }; 529 #endif 530 531 static int __init ak4535_modinit(void) 532 { 533 int ret = 0; 534 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 535 ret = i2c_add_driver(&ak4535_i2c_driver); 536 if (ret != 0) { 537 printk(KERN_ERR "Failed to register AK4535 I2C driver: %d\n", 538 ret); 539 } 540 #endif 541 return ret; 542 } 543 module_init(ak4535_modinit); 544 545 static void __exit ak4535_exit(void) 546 { 547 #if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) 548 i2c_del_driver(&ak4535_i2c_driver); 549 #endif 550 } 551 module_exit(ak4535_exit); 552 553 MODULE_DESCRIPTION("Soc AK4535 driver"); 554 MODULE_AUTHOR("Richard Purdie"); 555 MODULE_LICENSE("GPL"); 556