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 clock_provider; 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 (clock provider mode, fsref rate) */ 121 if (aic26->clock_provider) 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 switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { 182 case SND_SOC_DAIFMT_CBP_CFP: aic26->clock_provider = 1; break; 183 case SND_SOC_DAIFMT_CBC_CFC: aic26->clock_provider = 0; break; 184 default: 185 dev_dbg(&aic26->spi->dev, "bad master\n"); return -EINVAL; 186 } 187 188 /* interface format */ 189 switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { 190 case SND_SOC_DAIFMT_I2S: aic26->datfm = AIC26_DATFM_I2S; break; 191 case SND_SOC_DAIFMT_DSP_A: aic26->datfm = AIC26_DATFM_DSP; break; 192 case SND_SOC_DAIFMT_RIGHT_J: aic26->datfm = AIC26_DATFM_RIGHTJ; break; 193 case SND_SOC_DAIFMT_LEFT_J: aic26->datfm = AIC26_DATFM_LEFTJ; break; 194 default: 195 dev_dbg(&aic26->spi->dev, "bad format\n"); return -EINVAL; 196 } 197 198 return 0; 199 } 200 201 /* --------------------------------------------------------------------- 202 * Digital Audio Interface Definition 203 */ 204 #define AIC26_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ 205 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\ 206 SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\ 207 SNDRV_PCM_RATE_48000) 208 #define AIC26_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE |\ 209 SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE) 210 211 static const struct snd_soc_dai_ops aic26_dai_ops = { 212 .hw_params = aic26_hw_params, 213 .mute_stream = aic26_mute, 214 .set_sysclk = aic26_set_sysclk, 215 .set_fmt = aic26_set_fmt, 216 .no_capture_mute = 1, 217 }; 218 219 static struct snd_soc_dai_driver aic26_dai = { 220 .name = "tlv320aic26-hifi", 221 .playback = { 222 .stream_name = "Playback", 223 .channels_min = 2, 224 .channels_max = 2, 225 .rates = AIC26_RATES, 226 .formats = AIC26_FORMATS, 227 }, 228 .capture = { 229 .stream_name = "Capture", 230 .channels_min = 2, 231 .channels_max = 2, 232 .rates = AIC26_RATES, 233 .formats = AIC26_FORMATS, 234 }, 235 .ops = &aic26_dai_ops, 236 }; 237 238 /* --------------------------------------------------------------------- 239 * ALSA controls 240 */ 241 static const char *aic26_capture_src_text[] = {"Mic", "Aux"}; 242 static SOC_ENUM_SINGLE_DECL(aic26_capture_src_enum, 243 AIC26_REG_AUDIO_CTRL1, 12, 244 aic26_capture_src_text); 245 246 static const struct snd_kcontrol_new aic26_snd_controls[] = { 247 /* Output */ 248 SOC_DOUBLE("PCM Playback Volume", AIC26_REG_DAC_GAIN, 8, 0, 0x7f, 1), 249 SOC_DOUBLE("PCM Playback Switch", AIC26_REG_DAC_GAIN, 15, 7, 1, 1), 250 SOC_SINGLE("PCM Capture Volume", AIC26_REG_ADC_GAIN, 8, 0x7f, 0), 251 SOC_SINGLE("PCM Capture Mute", AIC26_REG_ADC_GAIN, 15, 1, 1), 252 SOC_SINGLE("Keyclick activate", AIC26_REG_AUDIO_CTRL2, 15, 0x1, 0), 253 SOC_SINGLE("Keyclick amplitude", AIC26_REG_AUDIO_CTRL2, 12, 0x7, 0), 254 SOC_SINGLE("Keyclick frequency", AIC26_REG_AUDIO_CTRL2, 8, 0x7, 0), 255 SOC_SINGLE("Keyclick period", AIC26_REG_AUDIO_CTRL2, 4, 0xf, 0), 256 SOC_ENUM("Capture Source", aic26_capture_src_enum), 257 }; 258 259 /* --------------------------------------------------------------------- 260 * SPI device portion of driver: sysfs files for debugging 261 */ 262 263 static ssize_t keyclick_show(struct device *dev, 264 struct device_attribute *attr, char *buf) 265 { 266 struct aic26 *aic26 = dev_get_drvdata(dev); 267 int val, amp, freq, len; 268 269 val = snd_soc_component_read(aic26->component, AIC26_REG_AUDIO_CTRL2); 270 amp = (val >> 12) & 0x7; 271 freq = (125 << ((val >> 8) & 0x7)) >> 1; 272 len = 2 * (1 + ((val >> 4) & 0xf)); 273 274 return sysfs_emit(buf, "amp=%x freq=%iHz len=%iclks\n", amp, freq, len); 275 } 276 277 /* Any write to the keyclick attribute will trigger the keyclick event */ 278 static ssize_t keyclick_store(struct device *dev, 279 struct device_attribute *attr, 280 const char *buf, size_t count) 281 { 282 struct aic26 *aic26 = dev_get_drvdata(dev); 283 284 snd_soc_component_update_bits(aic26->component, AIC26_REG_AUDIO_CTRL2, 285 0x8000, 0x800); 286 287 return count; 288 } 289 290 static DEVICE_ATTR_RW(keyclick); 291 292 /* --------------------------------------------------------------------- 293 * SoC CODEC portion of driver: probe and release routines 294 */ 295 static int aic26_probe(struct snd_soc_component *component) 296 { 297 struct aic26 *aic26 = dev_get_drvdata(component->dev); 298 int ret, reg; 299 300 aic26->component = component; 301 302 /* Reset the codec to power on defaults */ 303 snd_soc_component_write(component, AIC26_REG_RESET, 0xBB00); 304 305 /* Power up CODEC */ 306 snd_soc_component_write(component, AIC26_REG_POWER_CTRL, 0); 307 308 /* Audio Control 3 (master mode, fsref rate) */ 309 reg = snd_soc_component_read(component, AIC26_REG_AUDIO_CTRL3); 310 reg &= ~0xf800; 311 reg |= 0x0800; /* set master mode */ 312 snd_soc_component_write(component, AIC26_REG_AUDIO_CTRL3, reg); 313 314 /* Register the sysfs files for debugging */ 315 /* Create SysFS files */ 316 ret = device_create_file(component->dev, &dev_attr_keyclick); 317 if (ret) 318 dev_info(component->dev, "error creating sysfs files\n"); 319 320 return 0; 321 } 322 323 static const struct snd_soc_component_driver aic26_soc_component_dev = { 324 .probe = aic26_probe, 325 .controls = aic26_snd_controls, 326 .num_controls = ARRAY_SIZE(aic26_snd_controls), 327 .dapm_widgets = tlv320aic26_dapm_widgets, 328 .num_dapm_widgets = ARRAY_SIZE(tlv320aic26_dapm_widgets), 329 .dapm_routes = tlv320aic26_dapm_routes, 330 .num_dapm_routes = ARRAY_SIZE(tlv320aic26_dapm_routes), 331 .idle_bias_on = 1, 332 .use_pmdown_time = 1, 333 .endianness = 1, 334 }; 335 336 static const struct regmap_config aic26_regmap = { 337 .reg_bits = 16, 338 .val_bits = 16, 339 }; 340 341 /* --------------------------------------------------------------------- 342 * SPI device portion of driver: probe and release routines and SPI 343 * driver registration. 344 */ 345 static int aic26_spi_probe(struct spi_device *spi) 346 { 347 struct aic26 *aic26; 348 int ret; 349 350 dev_dbg(&spi->dev, "probing tlv320aic26 spi device\n"); 351 352 /* Allocate driver data */ 353 aic26 = devm_kzalloc(&spi->dev, sizeof *aic26, GFP_KERNEL); 354 if (!aic26) 355 return -ENOMEM; 356 357 aic26->regmap = devm_regmap_init_spi(spi, &aic26_regmap); 358 if (IS_ERR(aic26->regmap)) 359 return PTR_ERR(aic26->regmap); 360 361 /* Initialize the driver data */ 362 aic26->spi = spi; 363 dev_set_drvdata(&spi->dev, aic26); 364 aic26->clock_provider = 1; 365 366 ret = devm_snd_soc_register_component(&spi->dev, 367 &aic26_soc_component_dev, &aic26_dai, 1); 368 return ret; 369 } 370 371 static struct spi_driver aic26_spi = { 372 .driver = { 373 .name = "tlv320aic26-codec", 374 }, 375 .probe = aic26_spi_probe, 376 }; 377 378 module_spi_driver(aic26_spi); 379