sound/soc/codecs/tlv320aic26.c

   1 // SPDX-License-Identifier: GPL-2.0-only
   2 /*
   3  * Texas Instruments TLV320AIC26 low power audio CODEC
   4  * ALSA SoC CODEC driver
   5  *
   6  * Copyright (C) 2008 Secret Lab Technologies Ltd.
   7  */
   8
   9 #include <linux/module.h>
  10 #include <linux/moduleparam.h>
  11 #include <linux/init.h>
  12 #include <linux/delay.h>
  13 #include <linux/pm.h>
  14 #include <linux/device.h>
  15 #include <linux/sysfs.h>
  16 #include <linux/spi/spi.h>
  17 #include <linux/slab.h>
  18 #include <sound/core.h>
  19 #include <sound/pcm.h>
  20 #include <sound/pcm_params.h>
  21 #include <sound/soc.h>
  22 #include <sound/initval.h>
  23
  24 #include "tlv320aic26.h"
  25
  26 MODULE_DESCRIPTION("ASoC TLV320AIC26 codec driver");
  27 MODULE_AUTHOR("Grant Likely <grant.likely@secretlab.ca>");
  28 MODULE_LICENSE("GPL");
  29
  30 /* AIC26 driver private data */
  31 struct aic26 {
  32         struct spi_device *spi;
  33         struct regmap *regmap;
  34         struct snd_soc_component *component;
  35         int master;
  36         int datfm;
  37         int mclk;
  38
  39         /* Keyclick parameters */
  40         int keyclick_amplitude;
  41         int keyclick_freq;
  42         int keyclick_len;
  43 };
  44
  45 static const struct snd_soc_dapm_widget tlv320aic26_dapm_widgets[] = {
  46 SND_SOC_DAPM_INPUT("MICIN"),
  47 SND_SOC_DAPM_INPUT("AUX"),
  48
  49 SND_SOC_DAPM_OUTPUT("HPL"),
  50 SND_SOC_DAPM_OUTPUT("HPR"),
  51 };
  52
  53 static const struct snd_soc_dapm_route tlv320aic26_dapm_routes[] = {
  54         { "Capture", NULL, "MICIN" },
  55         { "Capture", NULL, "AUX" },
  56
  57         { "HPL", NULL, "Playback" },
  58         { "HPR", NULL, "Playback" },
  59 };
  60
  61 /* ---------------------------------------------------------------------
  62  * Digital Audio Interface Operations
  63  */
  64 static int aic26_hw_params(struct snd_pcm_substream *substream,
  65                            struct snd_pcm_hw_params *params,
  66                            struct snd_soc_dai *dai)
  67 {
  68         struct snd_soc_component *component = dai->component;
  69         struct aic26 *aic26 = snd_soc_component_get_drvdata(component);
  70         int fsref, divisor, wlen, pval, jval, dval, qval;
  71         u16 reg;
  72
  73         dev_dbg(&aic26->spi->dev, "aic26_hw_params(substream=%p, params=%p)\n",
  74                 substream, params);
  75         dev_dbg(&aic26->spi->dev, "rate=%i width=%d\n", params_rate(params),
  76                 params_width(params));
  77
  78         switch (params_rate(params)) {
  79         case 8000:  fsref = 48000; divisor = AIC26_DIV_6; break;
  80         case 11025: fsref = 44100; divisor = AIC26_DIV_4; break;
  81         case 12000: fsref = 48000; divisor = AIC26_DIV_4; break;
  82         case 16000: fsref = 48000; divisor = AIC26_DIV_3; break;
  83         case 22050: fsref = 44100; divisor = AIC26_DIV_2; break;
  84         case 24000: fsref = 48000; divisor = AIC26_DIV_2; break;
  85         case 32000: fsref = 48000; divisor = AIC26_DIV_1_5; break;
  86         case 44100: fsref = 44100; divisor = AIC26_DIV_1; break;
  87         case 48000: fsref = 48000; divisor = AIC26_DIV_1; break;
  88         default:
  89                 dev_dbg(&aic26->spi->dev, "bad rate\n"); return -EINVAL;
  90         }
  91
  92         /* select data word length */
  93         switch (params_width(params)) {
  94         case 8:  wlen = AIC26_WLEN_16; break;
  95         case 16: wlen = AIC26_WLEN_16; break;
  96         case 24: wlen = AIC26_WLEN_24; break;
  97         case 32: wlen = AIC26_WLEN_32; break;
  98         default:
  99                 dev_dbg(&aic26->spi->dev, "bad format\n"); return -EINVAL;
 100         }
 101
 102         /**
 103          * Configure PLL
 104          * fsref = (mclk * PLLM) / 2048
 105          * where PLLM = J.DDDD (DDDD register ranges from 0 to 9999, decimal)
 106          */
 107         pval = 1;
 108         /* compute J portion of multiplier */
 109         jval = fsref / (aic26->mclk / 2048);
 110         /* compute fractional DDDD component of multiplier */
 111         dval = fsref - (jval * (aic26->mclk / 2048));
 112         dval = (10000 * dval) / (aic26->mclk / 2048);
 113         dev_dbg(&aic26->spi->dev, "Setting PLLM to %d.%04d\n", jval, dval);
 114         qval = 0;
 115         reg = 0x8000 | qval << 11 | pval << 8 | jval << 2;
 116         snd_soc_component_write(component, AIC26_REG_PLL_PROG1, reg);
 117         reg = dval << 2;
 118         snd_soc_component_write(component, AIC26_REG_PLL_PROG2, reg);
 119
 120         /* Audio Control 3 (master mode, fsref rate) */
 121         if (aic26->master)
 122                 reg = 0x0800;
 123         if (fsref == 48000)
 124                 reg = 0x2000;
 125         snd_soc_component_update_bits(component, AIC26_REG_AUDIO_CTRL3, 0xf800, reg);
 126
 127         /* Audio Control 1 (FSref divisor) */
 128         reg = wlen | aic26->datfm | (divisor << 3) | divisor;
 129         snd_soc_component_update_bits(component, AIC26_REG_AUDIO_CTRL1, 0xfff, reg);
 130
 131         return 0;
 132 }
 133
 134 /*
 135  * aic26_mute - Mute control to reduce noise when changing audio format
 136  */
 137 static int aic26_mute(struct snd_soc_dai *dai, int mute, int direction)
 138 {
 139         struct snd_soc_component *component = dai->component;
 140         struct aic26 *aic26 = snd_soc_component_get_drvdata(component);
 141         u16 reg;
 142
 143         dev_dbg(&aic26->spi->dev, "aic26_mute(dai=%p, mute=%i)\n",
 144                 dai, mute);
 145
 146         if (mute)
 147                 reg = 0x8080;
 148         else
 149                 reg = 0;
 150         snd_soc_component_update_bits(component, AIC26_REG_DAC_GAIN, 0x8000, reg);
 151
 152         return 0;
 153 }
 154
 155 static int aic26_set_sysclk(struct snd_soc_dai *codec_dai,
 156                             int clk_id, unsigned int freq, int dir)
 157 {
 158         struct snd_soc_component *component = codec_dai->component;
 159         struct aic26 *aic26 = snd_soc_component_get_drvdata(component);
 160
 161         dev_dbg(&aic26->spi->dev, "aic26_set_sysclk(dai=%p, clk_id==%i,"
 162                 " freq=%i, dir=%i)\n",
 163                 codec_dai, clk_id, freq, dir);
 164
 165         /* MCLK needs to fall between 2MHz and 50 MHz */
 166         if ((freq < 2000000) || (freq > 50000000))
 167                 return -EINVAL;
 168
 169         aic26->mclk = freq;
 170         return 0;
 171 }
 172
 173 static int aic26_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
 174 {
 175         struct snd_soc_component *component = codec_dai->component;
 176         struct aic26 *aic26 = snd_soc_component_get_drvdata(component);
 177
 178         dev_dbg(&aic26->spi->dev, "aic26_set_fmt(dai=%p, fmt==%i)\n",
 179                 codec_dai, fmt);
 180
 181         /* set master/slave audio interface */
 182         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 183         case SND_SOC_DAIFMT_CBM_CFM: aic26->master = 1; break;
 184         case SND_SOC_DAIFMT_CBS_CFS: aic26->master = 0; break;
 185         default:
 186                 dev_dbg(&aic26->spi->dev, "bad master\n"); return -EINVAL;
 187         }
 188
 189         /* interface format */
 190         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 191         case SND_SOC_DAIFMT_I2S:     aic26->datfm = AIC26_DATFM_I2S; break;
 192         case SND_SOC_DAIFMT_DSP_A:   aic26->datfm = AIC26_DATFM_DSP; break;
 193         case SND_SOC_DAIFMT_RIGHT_J: aic26->datfm = AIC26_DATFM_RIGHTJ; break;
 194         case SND_SOC_DAIFMT_LEFT_J:  aic26->datfm = AIC26_DATFM_LEFTJ; break;
 195         default:
 196                 dev_dbg(&aic26->spi->dev, "bad format\n"); return -EINVAL;
 197         }
 198
 199         return 0;
 200 }
 201
 202 /* ---------------------------------------------------------------------
 203  * Digital Audio Interface Definition
 204  */
 205 #define AIC26_RATES     (SNDRV_PCM_RATE_8000  | SNDRV_PCM_RATE_11025 |\
 206                          SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
 207                          SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
 208                          SNDRV_PCM_RATE_48000)
 209 #define AIC26_FORMATS   (SNDRV_PCM_FMTBIT_S8     | SNDRV_PCM_FMTBIT_S16_BE |\
 210                          SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE)
 211
 212 static const struct snd_soc_dai_ops aic26_dai_ops = {
 213         .hw_params      = aic26_hw_params,
 214         .mute_stream    = aic26_mute,
 215         .set_sysclk     = aic26_set_sysclk,
 216         .set_fmt        = aic26_set_fmt,
 217         .no_capture_mute = 1,
 218 };
 219
 220 static struct snd_soc_dai_driver aic26_dai = {
 221         .name = "tlv320aic26-hifi",
 222         .playback = {
 223                 .stream_name = "Playback",
 224                 .channels_min = 2,
 225                 .channels_max = 2,
 226                 .rates = AIC26_RATES,
 227                 .formats = AIC26_FORMATS,
 228         },
 229         .capture = {
 230                 .stream_name = "Capture",
 231                 .channels_min = 2,
 232                 .channels_max = 2,
 233                 .rates = AIC26_RATES,
 234                 .formats = AIC26_FORMATS,
 235         },
 236         .ops = &aic26_dai_ops,
 237 };
 238
 239 /* ---------------------------------------------------------------------
 240  * ALSA controls
 241  */
 242 static const char *aic26_capture_src_text[] = {"Mic", "Aux"};
 243 static SOC_ENUM_SINGLE_DECL(aic26_capture_src_enum,
 244                             AIC26_REG_AUDIO_CTRL1, 12,
 245                             aic26_capture_src_text);
 246
 247 static const struct snd_kcontrol_new aic26_snd_controls[] = {
 248         /* Output */
 249         SOC_DOUBLE("PCM Playback Volume", AIC26_REG_DAC_GAIN, 8, 0, 0x7f, 1),
 250         SOC_DOUBLE("PCM Playback Switch", AIC26_REG_DAC_GAIN, 15, 7, 1, 1),
 251         SOC_SINGLE("PCM Capture Volume", AIC26_REG_ADC_GAIN, 8, 0x7f, 0),
 252         SOC_SINGLE("PCM Capture Mute", AIC26_REG_ADC_GAIN, 15, 1, 1),
 253         SOC_SINGLE("Keyclick activate", AIC26_REG_AUDIO_CTRL2, 15, 0x1, 0),
 254         SOC_SINGLE("Keyclick amplitude", AIC26_REG_AUDIO_CTRL2, 12, 0x7, 0),
 255         SOC_SINGLE("Keyclick frequency", AIC26_REG_AUDIO_CTRL2, 8, 0x7, 0),
 256         SOC_SINGLE("Keyclick period", AIC26_REG_AUDIO_CTRL2, 4, 0xf, 0),
 257         SOC_ENUM("Capture Source", aic26_capture_src_enum),
 258 };
 259
 260 /* ---------------------------------------------------------------------
 261  * SPI device portion of driver: sysfs files for debugging
 262  */
 263
 264 static ssize_t aic26_keyclick_show(struct device *dev,
 265                                    struct device_attribute *attr, char *buf)
 266 {
 267         struct aic26 *aic26 = dev_get_drvdata(dev);
 268         int val, amp, freq, len;
 269
 270         val = snd_soc_component_read(aic26->component, AIC26_REG_AUDIO_CTRL2);
 271         amp = (val >> 12) & 0x7;
 272         freq = (125 << ((val >> 8) & 0x7)) >> 1;
 273         len = 2 * (1 + ((val >> 4) & 0xf));
 274
 275         return sprintf(buf, "amp=%x freq=%iHz len=%iclks\n", amp, freq, len);
 276 }
 277
 278 /* Any write to the keyclick attribute will trigger the keyclick event */
 279 static ssize_t aic26_keyclick_set(struct device *dev,
 280                                   struct device_attribute *attr,
 281                                   const char *buf, size_t count)
 282 {
 283         struct aic26 *aic26 = dev_get_drvdata(dev);
 284
 285         snd_soc_component_update_bits(aic26->component, AIC26_REG_AUDIO_CTRL2,
 286                             0x8000, 0x800);
 287
 288         return count;
 289 }
 290
 291 static DEVICE_ATTR(keyclick, 0644, aic26_keyclick_show, aic26_keyclick_set);
 292
 293 /* ---------------------------------------------------------------------
 294  * SoC CODEC portion of driver: probe and release routines
 295  */
 296 static int aic26_probe(struct snd_soc_component *component)
 297 {
 298         struct aic26 *aic26 = dev_get_drvdata(component->dev);
 299         int ret, reg;
 300
 301         aic26->component = component;
 302
 303         /* Reset the codec to power on defaults */
 304         snd_soc_component_write(component, AIC26_REG_RESET, 0xBB00);
 305
 306         /* Power up CODEC */
 307         snd_soc_component_write(component, AIC26_REG_POWER_CTRL, 0);
 308
 309         /* Audio Control 3 (master mode, fsref rate) */
 310         reg = snd_soc_component_read(component, AIC26_REG_AUDIO_CTRL3);
 311         reg &= ~0xf800;
 312         reg |= 0x0800; /* set master mode */
 313         snd_soc_component_write(component, AIC26_REG_AUDIO_CTRL3, reg);
 314
 315         /* Register the sysfs files for debugging */
 316         /* Create SysFS files */
 317         ret = device_create_file(component->dev, &dev_attr_keyclick);
 318         if (ret)
 319                 dev_info(component->dev, "error creating sysfs files\n");
 320
 321         return 0;
 322 }
 323
 324 static const struct snd_soc_component_driver aic26_soc_component_dev = {
 325         .probe                  = aic26_probe,
 326         .controls               = aic26_snd_controls,
 327         .num_controls           = ARRAY_SIZE(aic26_snd_controls),
 328         .dapm_widgets           = tlv320aic26_dapm_widgets,
 329         .num_dapm_widgets       = ARRAY_SIZE(tlv320aic26_dapm_widgets),
 330         .dapm_routes            = tlv320aic26_dapm_routes,
 331         .num_dapm_routes        = ARRAY_SIZE(tlv320aic26_dapm_routes),
 332         .idle_bias_on           = 1,
 333         .use_pmdown_time        = 1,
 334         .endianness             = 1,
 335         .non_legacy_dai_naming  = 1,
 336 };
 337
 338 static const struct regmap_config aic26_regmap = {
 339         .reg_bits = 16,
 340         .val_bits = 16,
 341 };
 342
 343 /* ---------------------------------------------------------------------
 344  * SPI device portion of driver: probe and release routines and SPI
 345  *                               driver registration.
 346  */
 347 static int aic26_spi_probe(struct spi_device *spi)
 348 {
 349         struct aic26 *aic26;
 350         int ret;
 351
 352         dev_dbg(&spi->dev, "probing tlv320aic26 spi device\n");
 353
 354         /* Allocate driver data */
 355         aic26 = devm_kzalloc(&spi->dev, sizeof *aic26, GFP_KERNEL);
 356         if (!aic26)
 357                 return -ENOMEM;
 358
 359         aic26->regmap = devm_regmap_init_spi(spi, &aic26_regmap);
 360         if (IS_ERR(aic26->regmap))
 361                 return PTR_ERR(aic26->regmap);
 362
 363         /* Initialize the driver data */
 364         aic26->spi = spi;
 365         dev_set_drvdata(&spi->dev, aic26);
 366         aic26->master = 1;
 367
 368         ret = devm_snd_soc_register_component(&spi->dev,
 369                         &aic26_soc_component_dev, &aic26_dai, 1);
 370         return ret;
 371 }
 372
 373 static struct spi_driver aic26_spi = {
 374         .driver = {
 375                 .name = "tlv320aic26-codec",
 376         },
 377         .probe = aic26_spi_probe,
 378 };
 379
 380 module_spi_driver(aic26_spi);