diff options
Diffstat (limited to '')
| -rw-r--r-- | sound/soc/codecs/tlv320aic26.c | 378 |
1 files changed, 378 insertions, 0 deletions
diff --git a/sound/soc/codecs/tlv320aic26.c b/sound/soc/codecs/tlv320aic26.c new file mode 100644 index 000000000..e5dfb3d75 --- /dev/null +++ b/sound/soc/codecs/tlv320aic26.c @@ -0,0 +1,378 @@ +// 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); |