1 /* 2 * max9850.c -- codec driver for max9850 3 * 4 * Copyright (C) 2011 taskit GmbH 5 * 6 * Author: Christian Glindkamp <christian.glindkamp@taskit.de> 7 * 8 * Initial development of this code was funded by 9 * MICRONIC Computer Systeme GmbH, http://www.mcsberlin.de/ 10 * 11 * This program is free software; you can redistribute it and/or modify it 12 * under the terms of the GNU General Public License as published by the 13 * Free Software Foundation; either version 2 of the License, or (at your 14 * option) any later version. 15 * 16 */ 17 18 #include <linux/module.h> 19 #include <linux/init.h> 20 #include <linux/i2c.h> 21 #include <linux/regmap.h> 22 #include <linux/slab.h> 23 #include <sound/pcm.h> 24 #include <sound/pcm_params.h> 25 #include <sound/soc.h> 26 #include <sound/tlv.h> 27 28 #include "max9850.h" 29 30 struct max9850_priv { 31 struct regmap *regmap; 32 unsigned int sysclk; 33 }; 34 35 /* max9850 register cache */ 36 static const struct reg_default max9850_reg[] = { 37 { 2, 0x0c }, 38 { 3, 0x00 }, 39 { 4, 0x00 }, 40 { 5, 0x00 }, 41 { 6, 0x00 }, 42 { 7, 0x00 }, 43 { 8, 0x00 }, 44 { 9, 0x00 }, 45 { 10, 0x00 }, 46 }; 47 48 /* these registers are not used at the moment but provided for the sake of 49 * completeness */ 50 static bool max9850_volatile_register(struct device *dev, unsigned int reg) 51 { 52 switch (reg) { 53 case MAX9850_STATUSA: 54 case MAX9850_STATUSB: 55 return 1; 56 default: 57 return 0; 58 } 59 } 60 61 static const struct regmap_config max9850_regmap = { 62 .reg_bits = 8, 63 .val_bits = 8, 64 65 .max_register = MAX9850_DIGITAL_AUDIO, 66 .volatile_reg = max9850_volatile_register, 67 .cache_type = REGCACHE_RBTREE, 68 }; 69 70 static const unsigned int max9850_tlv[] = { 71 TLV_DB_RANGE_HEAD(4), 72 0x18, 0x1f, TLV_DB_SCALE_ITEM(-7450, 400, 0), 73 0x20, 0x33, TLV_DB_SCALE_ITEM(-4150, 200, 0), 74 0x34, 0x37, TLV_DB_SCALE_ITEM(-150, 100, 0), 75 0x38, 0x3f, TLV_DB_SCALE_ITEM(250, 50, 0), 76 }; 77 78 static const struct snd_kcontrol_new max9850_controls[] = { 79 SOC_SINGLE_TLV("Headphone Volume", MAX9850_VOLUME, 0, 0x3f, 1, max9850_tlv), 80 SOC_SINGLE("Headphone Switch", MAX9850_VOLUME, 7, 1, 1), 81 SOC_SINGLE("Mono Switch", MAX9850_GENERAL_PURPOSE, 2, 1, 0), 82 }; 83 84 static const struct snd_kcontrol_new max9850_mixer_controls[] = { 85 SOC_DAPM_SINGLE("Line In Switch", MAX9850_ENABLE, 1, 1, 0), 86 }; 87 88 static const struct snd_soc_dapm_widget max9850_dapm_widgets[] = { 89 SND_SOC_DAPM_SUPPLY("Charge Pump 1", MAX9850_ENABLE, 4, 0, NULL, 0), 90 SND_SOC_DAPM_SUPPLY("Charge Pump 2", MAX9850_ENABLE, 5, 0, NULL, 0), 91 SND_SOC_DAPM_SUPPLY("MCLK", MAX9850_ENABLE, 6, 0, NULL, 0), 92 SND_SOC_DAPM_SUPPLY("SHDN", MAX9850_ENABLE, 7, 0, NULL, 0), 93 SND_SOC_DAPM_MIXER_NAMED_CTL("Output Mixer", MAX9850_ENABLE, 2, 0, 94 &max9850_mixer_controls[0], 95 ARRAY_SIZE(max9850_mixer_controls)), 96 SND_SOC_DAPM_PGA("Headphone Output", MAX9850_ENABLE, 3, 0, NULL, 0), 97 SND_SOC_DAPM_DAC("DAC", "HiFi Playback", MAX9850_ENABLE, 0, 0), 98 SND_SOC_DAPM_OUTPUT("OUTL"), 99 SND_SOC_DAPM_OUTPUT("HPL"), 100 SND_SOC_DAPM_OUTPUT("OUTR"), 101 SND_SOC_DAPM_OUTPUT("HPR"), 102 SND_SOC_DAPM_MIXER("Line Input", SND_SOC_NOPM, 0, 0, NULL, 0), 103 SND_SOC_DAPM_INPUT("INL"), 104 SND_SOC_DAPM_INPUT("INR"), 105 }; 106 107 static const struct snd_soc_dapm_route max9850_dapm_routes[] = { 108 /* output mixer */ 109 {"Output Mixer", NULL, "DAC"}, 110 {"Output Mixer", "Line In Switch", "Line Input"}, 111 112 /* outputs */ 113 {"Headphone Output", NULL, "Output Mixer"}, 114 {"HPL", NULL, "Headphone Output"}, 115 {"HPR", NULL, "Headphone Output"}, 116 {"OUTL", NULL, "Output Mixer"}, 117 {"OUTR", NULL, "Output Mixer"}, 118 119 /* inputs */ 120 {"Line Input", NULL, "INL"}, 121 {"Line Input", NULL, "INR"}, 122 123 /* supplies */ 124 {"Output Mixer", NULL, "Charge Pump 1"}, 125 {"Output Mixer", NULL, "Charge Pump 2"}, 126 {"Output Mixer", NULL, "SHDN"}, 127 {"DAC", NULL, "MCLK"}, 128 }; 129 130 static int max9850_hw_params(struct snd_pcm_substream *substream, 131 struct snd_pcm_hw_params *params, 132 struct snd_soc_dai *dai) 133 { 134 struct snd_soc_codec *codec = dai->codec; 135 struct max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec); 136 u64 lrclk_div; 137 u8 sf, da; 138 139 if (!max9850->sysclk) 140 return -EINVAL; 141 142 /* lrclk_div = 2^22 * rate / iclk with iclk = mclk / sf */ 143 sf = (snd_soc_read(codec, MAX9850_CLOCK) >> 2) + 1; 144 lrclk_div = (1 << 22); 145 lrclk_div *= params_rate(params); 146 lrclk_div *= sf; 147 do_div(lrclk_div, max9850->sysclk); 148 149 snd_soc_write(codec, MAX9850_LRCLK_MSB, (lrclk_div >> 8) & 0x7f); 150 snd_soc_write(codec, MAX9850_LRCLK_LSB, lrclk_div & 0xff); 151 152 switch (params_format(params)) { 153 case SNDRV_PCM_FORMAT_S16_LE: 154 da = 0; 155 break; 156 case SNDRV_PCM_FORMAT_S20_3LE: 157 da = 0x2; 158 break; 159 case SNDRV_PCM_FORMAT_S24_LE: 160 da = 0x3; 161 break; 162 default: 163 return -EINVAL; 164 } 165 snd_soc_update_bits(codec, MAX9850_DIGITAL_AUDIO, 0x3, da); 166 167 return 0; 168 } 169 170 static int max9850_set_dai_sysclk(struct snd_soc_dai *codec_dai, 171 int clk_id, unsigned int freq, int dir) 172 { 173 struct snd_soc_codec *codec = codec_dai->codec; 174 struct max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec); 175 176 /* calculate mclk -> iclk divider */ 177 if (freq <= 13000000) 178 snd_soc_write(codec, MAX9850_CLOCK, 0x0); 179 else if (freq <= 26000000) 180 snd_soc_write(codec, MAX9850_CLOCK, 0x4); 181 else if (freq <= 40000000) 182 snd_soc_write(codec, MAX9850_CLOCK, 0x8); 183 else 184 return -EINVAL; 185 186 max9850->sysclk = freq; 187 return 0; 188 } 189 190 static int max9850_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) 191 { 192 struct snd_soc_codec *codec = codec_dai->codec; 193 u8 da = 0; 194 195 /* set master/slave audio interface */ 196 switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { 197 case SND_SOC_DAIFMT_CBM_CFM: 198 da |= MAX9850_MASTER; 199 break; 200 case SND_SOC_DAIFMT_CBS_CFS: 201 break; 202 default: 203 return -EINVAL; 204 } 205 206 /* interface format */ 207 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 208 case SND_SOC_DAIFMT_I2S: 209 da |= MAX9850_DLY; 210 break; 211 case SND_SOC_DAIFMT_RIGHT_J: 212 da |= MAX9850_RTJ; 213 break; 214 case SND_SOC_DAIFMT_LEFT_J: 215 break; 216 default: 217 return -EINVAL; 218 } 219 220 /* clock inversion */ 221 switch (fmt & SND_SOC_DAIFMT_INV_MASK) { 222 case SND_SOC_DAIFMT_NB_NF: 223 break; 224 case SND_SOC_DAIFMT_IB_IF: 225 da |= MAX9850_BCINV | MAX9850_INV; 226 break; 227 case SND_SOC_DAIFMT_IB_NF: 228 da |= MAX9850_BCINV; 229 break; 230 case SND_SOC_DAIFMT_NB_IF: 231 da |= MAX9850_INV; 232 break; 233 default: 234 return -EINVAL; 235 } 236 237 /* set da */ 238 snd_soc_write(codec, MAX9850_DIGITAL_AUDIO, da); 239 240 return 0; 241 } 242 243 static int max9850_set_bias_level(struct snd_soc_codec *codec, 244 enum snd_soc_bias_level level) 245 { 246 struct max9850_priv *max9850 = snd_soc_codec_get_drvdata(codec); 247 int ret; 248 249 switch (level) { 250 case SND_SOC_BIAS_ON: 251 break; 252 case SND_SOC_BIAS_PREPARE: 253 break; 254 case SND_SOC_BIAS_STANDBY: 255 if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) { 256 ret = regcache_sync(max9850->regmap); 257 if (ret) { 258 dev_err(codec->dev, 259 "Failed to sync cache: %d\n", ret); 260 return ret; 261 } 262 } 263 break; 264 case SND_SOC_BIAS_OFF: 265 break; 266 } 267 codec->dapm.bias_level = level; 268 return 0; 269 } 270 271 #define MAX9850_RATES SNDRV_PCM_RATE_8000_48000 272 273 #define MAX9850_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ 274 SNDRV_PCM_FMTBIT_S24_LE) 275 276 static const struct snd_soc_dai_ops max9850_dai_ops = { 277 .hw_params = max9850_hw_params, 278 .set_sysclk = max9850_set_dai_sysclk, 279 .set_fmt = max9850_set_dai_fmt, 280 }; 281 282 static struct snd_soc_dai_driver max9850_dai = { 283 .name = "max9850-hifi", 284 .playback = { 285 .stream_name = "Playback", 286 .channels_min = 1, 287 .channels_max = 2, 288 .rates = MAX9850_RATES, 289 .formats = MAX9850_FORMATS 290 }, 291 .ops = &max9850_dai_ops, 292 }; 293 294 #ifdef CONFIG_PM 295 static int max9850_suspend(struct snd_soc_codec *codec) 296 { 297 max9850_set_bias_level(codec, SND_SOC_BIAS_OFF); 298 299 return 0; 300 } 301 302 static int max9850_resume(struct snd_soc_codec *codec) 303 { 304 max9850_set_bias_level(codec, SND_SOC_BIAS_STANDBY); 305 306 return 0; 307 } 308 #else 309 #define max9850_suspend NULL 310 #define max9850_resume NULL 311 #endif 312 313 static int max9850_probe(struct snd_soc_codec *codec) 314 { 315 int ret; 316 317 ret = snd_soc_codec_set_cache_io(codec, 8, 8, SND_SOC_REGMAP); 318 if (ret < 0) { 319 dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret); 320 return ret; 321 } 322 323 /* enable zero-detect */ 324 snd_soc_update_bits(codec, MAX9850_GENERAL_PURPOSE, 1, 1); 325 /* enable slew-rate control */ 326 snd_soc_update_bits(codec, MAX9850_VOLUME, 0x40, 0x40); 327 /* set slew-rate 125ms */ 328 snd_soc_update_bits(codec, MAX9850_CHARGE_PUMP, 0xff, 0xc0); 329 330 return 0; 331 } 332 333 static struct snd_soc_codec_driver soc_codec_dev_max9850 = { 334 .probe = max9850_probe, 335 .suspend = max9850_suspend, 336 .resume = max9850_resume, 337 .set_bias_level = max9850_set_bias_level, 338 339 .controls = max9850_controls, 340 .num_controls = ARRAY_SIZE(max9850_controls), 341 .dapm_widgets = max9850_dapm_widgets, 342 .num_dapm_widgets = ARRAY_SIZE(max9850_dapm_widgets), 343 .dapm_routes = max9850_dapm_routes, 344 .num_dapm_routes = ARRAY_SIZE(max9850_dapm_routes), 345 }; 346 347 static int max9850_i2c_probe(struct i2c_client *i2c, 348 const struct i2c_device_id *id) 349 { 350 struct max9850_priv *max9850; 351 int ret; 352 353 max9850 = devm_kzalloc(&i2c->dev, sizeof(struct max9850_priv), 354 GFP_KERNEL); 355 if (max9850 == NULL) 356 return -ENOMEM; 357 358 max9850->regmap = devm_regmap_init_i2c(i2c, &max9850_regmap); 359 if (IS_ERR(max9850->regmap)) 360 return PTR_ERR(max9850->regmap); 361 362 i2c_set_clientdata(i2c, max9850); 363 364 ret = snd_soc_register_codec(&i2c->dev, 365 &soc_codec_dev_max9850, &max9850_dai, 1); 366 return ret; 367 } 368 369 static int max9850_i2c_remove(struct i2c_client *client) 370 { 371 snd_soc_unregister_codec(&client->dev); 372 return 0; 373 } 374 375 static const struct i2c_device_id max9850_i2c_id[] = { 376 { "max9850", 0 }, 377 { } 378 }; 379 MODULE_DEVICE_TABLE(i2c, max9850_i2c_id); 380 381 static struct i2c_driver max9850_i2c_driver = { 382 .driver = { 383 .name = "max9850", 384 .owner = THIS_MODULE, 385 }, 386 .probe = max9850_i2c_probe, 387 .remove = max9850_i2c_remove, 388 .id_table = max9850_i2c_id, 389 }; 390 391 module_i2c_driver(max9850_i2c_driver); 392 393 MODULE_AUTHOR("Christian Glindkamp <christian.glindkamp@taskit.de>"); 394 MODULE_DESCRIPTION("ASoC MAX9850 codec driver"); 395 MODULE_LICENSE("GPL"); 396