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