sound/soc/codecs/sta529.c

   1 /*
   2  * ASoC codec driver for spear platform
   3  *
   4  * sound/soc/codecs/sta529.c -- spear ALSA Soc codec driver
   5  *
   6  * Copyright (C) 2012 ST Microelectronics
   7  * Rajeev Kumar <rajeevkumar.linux@gmail.com>
   8  *
   9  * This file is licensed under the terms of the GNU General Public
  10  * License version 2. This program is licensed "as is" without any
  11  * warranty of any kind, whether express or implied.
  12  */
  13
  14 #include <linux/clk.h>
  15 #include <linux/init.h>
  16 #include <linux/i2c.h>
  17 #include <linux/io.h>
  18 #include <linux/module.h>
  19 #include <linux/moduleparam.h>
  20 #include <linux/pm.h>
  21 #include <linux/regmap.h>
  22 #include <linux/slab.h>
  23
  24 #include <sound/core.h>
  25 #include <sound/initval.h>
  26 #include <sound/pcm.h>
  27 #include <sound/pcm_params.h>
  28 #include <sound/soc.h>
  29 #include <sound/soc-dapm.h>
  30 #include <sound/tlv.h>
  31
  32 /* STA529 Register offsets */
  33 #define  STA529_FFXCFG0         0x00
  34 #define  STA529_FFXCFG1         0x01
  35 #define  STA529_MVOL            0x02
  36 #define  STA529_LVOL            0x03
  37 #define  STA529_RVOL            0x04
  38 #define  STA529_TTF0            0x05
  39 #define  STA529_TTF1            0x06
  40 #define  STA529_TTP0            0x07
  41 #define  STA529_TTP1            0x08
  42 #define  STA529_S2PCFG0         0x0A
  43 #define  STA529_S2PCFG1         0x0B
  44 #define  STA529_P2SCFG0         0x0C
  45 #define  STA529_P2SCFG1         0x0D
  46 #define  STA529_PLLCFG0         0x14
  47 #define  STA529_PLLCFG1         0x15
  48 #define  STA529_PLLCFG2         0x16
  49 #define  STA529_PLLCFG3         0x17
  50 #define  STA529_PLLPFE          0x18
  51 #define  STA529_PLLST           0x19
  52 #define  STA529_ADCCFG          0x1E /*mic_select*/
  53 #define  STA529_CKOCFG          0x1F
  54 #define  STA529_MISC            0x20
  55 #define  STA529_PADST0          0x21
  56 #define  STA529_PADST1          0x22
  57 #define  STA529_FFXST           0x23
  58 #define  STA529_PWMIN1          0x2D
  59 #define  STA529_PWMIN2          0x2E
  60 #define  STA529_POWST           0x32
  61
  62 #define STA529_MAX_REGISTER     0x32
  63
  64 #define STA529_RATES            (SNDRV_PCM_RATE_8000 | \
  65                                 SNDRV_PCM_RATE_11025 | \
  66                                 SNDRV_PCM_RATE_16000 | \
  67                                 SNDRV_PCM_RATE_22050 | \
  68                                 SNDRV_PCM_RATE_32000 | \
  69                                 SNDRV_PCM_RATE_44100 | \
  70                                 SNDRV_PCM_RATE_48000)
  71
  72 #define STA529_FORMAT           (SNDRV_PCM_FMTBIT_S16_LE | \
  73                                 SNDRV_PCM_FMTBIT_S24_LE | \
  74                                 SNDRV_PCM_FMTBIT_S32_LE)
  75 #define S2PC_VALUE              0x98
  76 #define CLOCK_OUT               0x60
  77 #define DATA_FORMAT_MSK         0x0E
  78 #define LEFT_J_DATA_FORMAT      0x00
  79 #define I2S_DATA_FORMAT         0x02
  80 #define RIGHT_J_DATA_FORMAT     0x04
  81 #define CODEC_MUTE_VAL          0x80
  82
  83 #define POWER_CNTLMSAK          0x40
  84 #define POWER_STDBY             0x40
  85 #define FFX_MASK                0x80
  86 #define FFX_OFF                 0x80
  87 #define POWER_UP                0x00
  88 #define FFX_CLK_ENB             0x01
  89 #define FFX_CLK_DIS             0x00
  90 #define FFX_CLK_MSK             0x01
  91 #define PLAY_FREQ_RANGE_MSK     0x70
  92 #define CAP_FREQ_RANGE_MSK      0x0C
  93 #define PDATA_LEN_MSK           0xC0
  94 #define BCLK_TO_FS_MSK          0x30
  95 #define AUDIO_MUTE_MSK          0x80
  96
  97 static const struct reg_default sta529_reg_defaults[] = {
  98         { 0,  0x35 },     /* R0   - FFX Configuration reg 0 */
  99         { 1,  0xc8 },     /* R1   - FFX Configuration reg 1 */
 100         { 2,  0x50 },     /* R2   - Master Volume */
 101         { 3,  0x00 },     /* R3   - Left Volume */
 102         { 4,  0x00 },     /* R4  -  Right Volume */
 103         { 10, 0xb2 },     /* R10  - S2P Config Reg 0 */
 104         { 11, 0x41 },     /* R11  - S2P Config Reg 1 */
 105         { 12, 0x92 },     /* R12  - P2S Config Reg 0 */
 106         { 13, 0x41 },     /* R13  - P2S Config Reg 1 */
 107         { 30, 0xd2 },     /* R30  - ADC Config Reg */
 108         { 31, 0x40 },     /* R31  - clock Out Reg */
 109         { 32, 0x21 },     /* R32  - Misc Register */
 110 };
 111
 112 struct sta529 {
 113         struct regmap *regmap;
 114 };
 115
 116 static bool sta529_readable(struct device *dev, unsigned int reg)
 117 {
 118         switch (reg) {
 119
 120         case STA529_FFXCFG0:
 121         case STA529_FFXCFG1:
 122         case STA529_MVOL:
 123         case STA529_LVOL:
 124         case STA529_RVOL:
 125         case STA529_S2PCFG0:
 126         case STA529_S2PCFG1:
 127         case STA529_P2SCFG0:
 128         case STA529_P2SCFG1:
 129         case STA529_ADCCFG:
 130         case STA529_CKOCFG:
 131         case STA529_MISC:
 132                 return true;
 133         default:
 134                 return false;
 135         }
 136 }
 137
 138
 139 static const char *pwm_mode_text[] = { "Binary", "Headphone", "Ternary",
 140         "Phase-shift"};
 141
 142 static const DECLARE_TLV_DB_SCALE(out_gain_tlv, -9150, 50, 0);
 143 static const DECLARE_TLV_DB_SCALE(master_vol_tlv, -12750, 50, 0);
 144 static SOC_ENUM_SINGLE_DECL(pwm_src, STA529_FFXCFG1, 4, pwm_mode_text);
 145
 146 static const struct snd_kcontrol_new sta529_snd_controls[] = {
 147         SOC_DOUBLE_R_TLV("Digital Playback Volume", STA529_LVOL, STA529_RVOL, 0,
 148                         127, 0, out_gain_tlv),
 149         SOC_SINGLE_TLV("Master Playback Volume", STA529_MVOL, 0, 127, 1,
 150                         master_vol_tlv),
 151         SOC_ENUM("PWM Select", pwm_src),
 152 };
 153
 154 static int sta529_set_bias_level(struct snd_soc_codec *codec, enum
 155                 snd_soc_bias_level level)
 156 {
 157         struct sta529 *sta529 = snd_soc_codec_get_drvdata(codec);
 158
 159         switch (level) {
 160         case SND_SOC_BIAS_ON:
 161         case SND_SOC_BIAS_PREPARE:
 162                 snd_soc_update_bits(codec, STA529_FFXCFG0, POWER_CNTLMSAK,
 163                                 POWER_UP);
 164                 snd_soc_update_bits(codec, STA529_MISC, FFX_CLK_MSK,
 165                                 FFX_CLK_ENB);
 166                 break;
 167         case SND_SOC_BIAS_STANDBY:
 168                 if (snd_soc_codec_get_bias_level(codec) == SND_SOC_BIAS_OFF)
 169                         regcache_sync(sta529->regmap);
 170                 snd_soc_update_bits(codec, STA529_FFXCFG0,
 171                                         POWER_CNTLMSAK, POWER_STDBY);
 172                 /* Making FFX output to zero */
 173                 snd_soc_update_bits(codec, STA529_FFXCFG0, FFX_MASK,
 174                                 FFX_OFF);
 175                 snd_soc_update_bits(codec, STA529_MISC, FFX_CLK_MSK,
 176                                 FFX_CLK_DIS);
 177                 break;
 178         case SND_SOC_BIAS_OFF:
 179                 break;
 180         }
 181
 182         return 0;
 183
 184 }
 185
 186 static int sta529_hw_params(struct snd_pcm_substream *substream,
 187                 struct snd_pcm_hw_params *params,
 188                 struct snd_soc_dai *dai)
 189 {
 190         struct snd_soc_codec *codec = dai->codec;
 191         int pdata, play_freq_val, record_freq_val;
 192         int bclk_to_fs_ratio;
 193
 194         switch (params_width(params)) {
 195         case 16:
 196                 pdata = 1;
 197                 bclk_to_fs_ratio = 0;
 198                 break;
 199         case 24:
 200                 pdata = 2;
 201                 bclk_to_fs_ratio = 1;
 202                 break;
 203         case 32:
 204                 pdata = 3;
 205                 bclk_to_fs_ratio = 2;
 206                 break;
 207         default:
 208                 dev_err(codec->dev, "Unsupported format\n");
 209                 return -EINVAL;
 210         }
 211
 212         switch (params_rate(params)) {
 213         case 8000:
 214         case 11025:
 215                 play_freq_val = 0;
 216                 record_freq_val = 2;
 217                 break;
 218         case 16000:
 219         case 22050:
 220                 play_freq_val = 1;
 221                 record_freq_val = 0;
 222                 break;
 223
 224         case 32000:
 225         case 44100:
 226         case 48000:
 227                 play_freq_val = 2;
 228                 record_freq_val = 0;
 229                 break;
 230         default:
 231                 dev_err(codec->dev, "Unsupported rate\n");
 232                 return -EINVAL;
 233         }
 234
 235         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 236                 snd_soc_update_bits(codec, STA529_S2PCFG1, PDATA_LEN_MSK,
 237                                 pdata << 6);
 238                 snd_soc_update_bits(codec, STA529_S2PCFG1, BCLK_TO_FS_MSK,
 239                                 bclk_to_fs_ratio << 4);
 240                 snd_soc_update_bits(codec, STA529_MISC, PLAY_FREQ_RANGE_MSK,
 241                                 play_freq_val << 4);
 242         } else {
 243                 snd_soc_update_bits(codec, STA529_P2SCFG1, PDATA_LEN_MSK,
 244                                 pdata << 6);
 245                 snd_soc_update_bits(codec, STA529_P2SCFG1, BCLK_TO_FS_MSK,
 246                                 bclk_to_fs_ratio << 4);
 247                 snd_soc_update_bits(codec, STA529_MISC, CAP_FREQ_RANGE_MSK,
 248                                 record_freq_val << 2);
 249         }
 250
 251         return 0;
 252 }
 253
 254 static int sta529_mute(struct snd_soc_dai *dai, int mute)
 255 {
 256         u8 val = 0;
 257
 258         if (mute)
 259                 val |= CODEC_MUTE_VAL;
 260
 261         snd_soc_update_bits(dai->codec, STA529_FFXCFG0, AUDIO_MUTE_MSK, val);
 262
 263         return 0;
 264 }
 265
 266 static int sta529_set_dai_fmt(struct snd_soc_dai *codec_dai, u32 fmt)
 267 {
 268         struct snd_soc_codec *codec = codec_dai->codec;
 269         u8 mode = 0;
 270
 271         /* interface format */
 272         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 273         case SND_SOC_DAIFMT_LEFT_J:
 274                 mode = LEFT_J_DATA_FORMAT;
 275                 break;
 276         case SND_SOC_DAIFMT_I2S:
 277                 mode = I2S_DATA_FORMAT;
 278                 break;
 279         case SND_SOC_DAIFMT_RIGHT_J:
 280                 mode = RIGHT_J_DATA_FORMAT;
 281                 break;
 282         default:
 283                 return -EINVAL;
 284         }
 285
 286         snd_soc_update_bits(codec, STA529_S2PCFG0, DATA_FORMAT_MSK, mode);
 287
 288         return 0;
 289 }
 290
 291 static const struct snd_soc_dai_ops sta529_dai_ops = {
 292         .hw_params      =       sta529_hw_params,
 293         .set_fmt        =       sta529_set_dai_fmt,
 294         .digital_mute   =       sta529_mute,
 295 };
 296
 297 static struct snd_soc_dai_driver sta529_dai = {
 298         .name = "sta529-audio",
 299         .playback = {
 300                 .stream_name = "Playback",
 301                 .channels_min = 2,
 302                 .channels_max = 2,
 303                 .rates = STA529_RATES,
 304                 .formats = STA529_FORMAT,
 305         },
 306         .capture = {
 307                 .stream_name = "Capture",
 308                 .channels_min = 2,
 309                 .channels_max = 2,
 310                 .rates = STA529_RATES,
 311                 .formats = STA529_FORMAT,
 312         },
 313         .ops    = &sta529_dai_ops,
 314 };
 315
 316 static const struct snd_soc_codec_driver sta529_codec_driver = {
 317         .set_bias_level = sta529_set_bias_level,
 318         .suspend_bias_off = true,
 319
 320         .component_driver = {
 321                 .controls               = sta529_snd_controls,
 322                 .num_controls           = ARRAY_SIZE(sta529_snd_controls),
 323         },
 324 };
 325
 326 static const struct regmap_config sta529_regmap = {
 327         .reg_bits = 8,
 328         .val_bits = 8,
 329
 330         .max_register = STA529_MAX_REGISTER,
 331         .readable_reg = sta529_readable,
 332
 333         .cache_type = REGCACHE_RBTREE,
 334         .reg_defaults = sta529_reg_defaults,
 335         .num_reg_defaults = ARRAY_SIZE(sta529_reg_defaults),
 336 };
 337
 338 static int sta529_i2c_probe(struct i2c_client *i2c,
 339                             const struct i2c_device_id *id)
 340 {
 341         struct sta529 *sta529;
 342         int ret;
 343
 344         sta529 = devm_kzalloc(&i2c->dev, sizeof(struct sta529), GFP_KERNEL);
 345         if (!sta529)
 346                 return -ENOMEM;
 347
 348         sta529->regmap = devm_regmap_init_i2c(i2c, &sta529_regmap);
 349         if (IS_ERR(sta529->regmap)) {
 350                 ret = PTR_ERR(sta529->regmap);
 351                 dev_err(&i2c->dev, "Failed to allocate regmap: %d\n", ret);
 352                 return ret;
 353         }
 354
 355         i2c_set_clientdata(i2c, sta529);
 356
 357         ret = snd_soc_register_codec(&i2c->dev,
 358                         &sta529_codec_driver, &sta529_dai, 1);
 359         if (ret != 0)
 360                 dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
 361
 362         return ret;
 363 }
 364
 365 static int sta529_i2c_remove(struct i2c_client *client)
 366 {
 367         snd_soc_unregister_codec(&client->dev);
 368
 369         return 0;
 370 }
 371
 372 static const struct i2c_device_id sta529_i2c_id[] = {
 373         { "sta529", 0 },
 374         { }
 375 };
 376 MODULE_DEVICE_TABLE(i2c, sta529_i2c_id);
 377
 378 static const struct of_device_id sta529_of_match[] = {
 379         { .compatible = "st,sta529", },
 380         { }
 381 };
 382 MODULE_DEVICE_TABLE(of, sta529_of_match);
 383
 384 static struct i2c_driver sta529_i2c_driver = {
 385         .driver = {
 386                 .name = "sta529",
 387                 .of_match_table = sta529_of_match,
 388         },
 389         .probe          = sta529_i2c_probe,
 390         .remove         = sta529_i2c_remove,
 391         .id_table       = sta529_i2c_id,
 392 };
 393
 394 module_i2c_driver(sta529_i2c_driver);
 395
 396 MODULE_DESCRIPTION("ASoC STA529 codec driver");
 397 MODULE_AUTHOR("Rajeev Kumar <rajeevkumar.linux@gmail.com>");
 398 MODULE_LICENSE("GPL");