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380 lines
11 KiB
380 lines
11 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* Texas Instruments TLV320AIC26 low power audio CODEC |
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* ALSA SoC CODEC driver |
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* |
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* Copyright (C) 2008 Secret Lab Technologies Ltd. |
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*/ |
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#include <linux/module.h> |
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#include <linux/moduleparam.h> |
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#include <linux/init.h> |
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#include <linux/delay.h> |
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#include <linux/pm.h> |
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#include <linux/device.h> |
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#include <linux/sysfs.h> |
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#include <linux/spi/spi.h> |
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#include <linux/slab.h> |
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#include <sound/core.h> |
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#include <sound/pcm.h> |
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#include <sound/pcm_params.h> |
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#include <sound/soc.h> |
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#include <sound/initval.h> |
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#include "tlv320aic26.h" |
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MODULE_DESCRIPTION("ASoC TLV320AIC26 codec driver"); |
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MODULE_AUTHOR("Grant Likely <[email protected]>"); |
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MODULE_LICENSE("GPL"); |
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/* AIC26 driver private data */ |
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struct aic26 { |
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struct spi_device *spi; |
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struct regmap *regmap; |
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struct snd_soc_component *component; |
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int master; |
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int datfm; |
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int mclk; |
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/* Keyclick parameters */ |
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int keyclick_amplitude; |
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int keyclick_freq; |
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int keyclick_len; |
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}; |
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static const struct snd_soc_dapm_widget tlv320aic26_dapm_widgets[] = { |
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SND_SOC_DAPM_INPUT("MICIN"), |
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SND_SOC_DAPM_INPUT("AUX"), |
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SND_SOC_DAPM_OUTPUT("HPL"), |
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SND_SOC_DAPM_OUTPUT("HPR"), |
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}; |
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static const struct snd_soc_dapm_route tlv320aic26_dapm_routes[] = { |
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{ "Capture", NULL, "MICIN" }, |
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{ "Capture", NULL, "AUX" }, |
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{ "HPL", NULL, "Playback" }, |
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{ "HPR", NULL, "Playback" }, |
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}; |
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/* --------------------------------------------------------------------- |
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* Digital Audio Interface Operations |
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*/ |
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static int aic26_hw_params(struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params, |
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struct snd_soc_dai *dai) |
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{ |
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struct snd_soc_component *component = dai->component; |
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struct aic26 *aic26 = snd_soc_component_get_drvdata(component); |
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int fsref, divisor, wlen, pval, jval, dval, qval; |
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u16 reg; |
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dev_dbg(&aic26->spi->dev, "aic26_hw_params(substream=%p, params=%p)\n", |
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substream, params); |
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dev_dbg(&aic26->spi->dev, "rate=%i width=%d\n", params_rate(params), |
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params_width(params)); |
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switch (params_rate(params)) { |
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case 8000: fsref = 48000; divisor = AIC26_DIV_6; break; |
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case 11025: fsref = 44100; divisor = AIC26_DIV_4; break; |
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case 12000: fsref = 48000; divisor = AIC26_DIV_4; break; |
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case 16000: fsref = 48000; divisor = AIC26_DIV_3; break; |
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case 22050: fsref = 44100; divisor = AIC26_DIV_2; break; |
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case 24000: fsref = 48000; divisor = AIC26_DIV_2; break; |
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case 32000: fsref = 48000; divisor = AIC26_DIV_1_5; break; |
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case 44100: fsref = 44100; divisor = AIC26_DIV_1; break; |
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case 48000: fsref = 48000; divisor = AIC26_DIV_1; break; |
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default: |
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dev_dbg(&aic26->spi->dev, "bad rate\n"); return -EINVAL; |
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} |
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/* select data word length */ |
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switch (params_width(params)) { |
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case 8: wlen = AIC26_WLEN_16; break; |
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case 16: wlen = AIC26_WLEN_16; break; |
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case 24: wlen = AIC26_WLEN_24; break; |
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case 32: wlen = AIC26_WLEN_32; break; |
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default: |
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dev_dbg(&aic26->spi->dev, "bad format\n"); return -EINVAL; |
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} |
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/** |
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* Configure PLL |
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* fsref = (mclk * PLLM) / 2048 |
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* where PLLM = J.DDDD (DDDD register ranges from 0 to 9999, decimal) |
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*/ |
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pval = 1; |
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/* compute J portion of multiplier */ |
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jval = fsref / (aic26->mclk / 2048); |
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/* compute fractional DDDD component of multiplier */ |
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dval = fsref - (jval * (aic26->mclk / 2048)); |
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dval = (10000 * dval) / (aic26->mclk / 2048); |
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dev_dbg(&aic26->spi->dev, "Setting PLLM to %d.%04d\n", jval, dval); |
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qval = 0; |
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reg = 0x8000 | qval << 11 | pval << 8 | jval << 2; |
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snd_soc_component_write(component, AIC26_REG_PLL_PROG1, reg); |
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reg = dval << 2; |
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snd_soc_component_write(component, AIC26_REG_PLL_PROG2, reg); |
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/* Audio Control 3 (master mode, fsref rate) */ |
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if (aic26->master) |
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reg = 0x0800; |
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if (fsref == 48000) |
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reg = 0x2000; |
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snd_soc_component_update_bits(component, AIC26_REG_AUDIO_CTRL3, 0xf800, reg); |
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/* Audio Control 1 (FSref divisor) */ |
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reg = wlen | aic26->datfm | (divisor << 3) | divisor; |
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snd_soc_component_update_bits(component, AIC26_REG_AUDIO_CTRL1, 0xfff, reg); |
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return 0; |
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} |
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/* |
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* aic26_mute - Mute control to reduce noise when changing audio format |
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*/ |
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static int aic26_mute(struct snd_soc_dai *dai, int mute, int direction) |
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{ |
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struct snd_soc_component *component = dai->component; |
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struct aic26 *aic26 = snd_soc_component_get_drvdata(component); |
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u16 reg; |
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dev_dbg(&aic26->spi->dev, "aic26_mute(dai=%p, mute=%i)\n", |
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dai, mute); |
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if (mute) |
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reg = 0x8080; |
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else |
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reg = 0; |
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snd_soc_component_update_bits(component, AIC26_REG_DAC_GAIN, 0x8000, reg); |
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return 0; |
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} |
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static int aic26_set_sysclk(struct snd_soc_dai *codec_dai, |
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int clk_id, unsigned int freq, int dir) |
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{ |
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struct snd_soc_component *component = codec_dai->component; |
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struct aic26 *aic26 = snd_soc_component_get_drvdata(component); |
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dev_dbg(&aic26->spi->dev, "aic26_set_sysclk(dai=%p, clk_id==%i," |
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" freq=%i, dir=%i)\n", |
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codec_dai, clk_id, freq, dir); |
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/* MCLK needs to fall between 2MHz and 50 MHz */ |
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if ((freq < 2000000) || (freq > 50000000)) |
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return -EINVAL; |
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aic26->mclk = freq; |
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return 0; |
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} |
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static int aic26_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) |
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{ |
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struct snd_soc_component *component = codec_dai->component; |
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struct aic26 *aic26 = snd_soc_component_get_drvdata(component); |
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dev_dbg(&aic26->spi->dev, "aic26_set_fmt(dai=%p, fmt==%i)\n", |
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codec_dai, fmt); |
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/* set master/slave audio interface */ |
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switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { |
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case SND_SOC_DAIFMT_CBM_CFM: aic26->master = 1; break; |
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case SND_SOC_DAIFMT_CBS_CFS: aic26->master = 0; break; |
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default: |
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dev_dbg(&aic26->spi->dev, "bad master\n"); return -EINVAL; |
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} |
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/* interface format */ |
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switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
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case SND_SOC_DAIFMT_I2S: aic26->datfm = AIC26_DATFM_I2S; break; |
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case SND_SOC_DAIFMT_DSP_A: aic26->datfm = AIC26_DATFM_DSP; break; |
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case SND_SOC_DAIFMT_RIGHT_J: aic26->datfm = AIC26_DATFM_RIGHTJ; break; |
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case SND_SOC_DAIFMT_LEFT_J: aic26->datfm = AIC26_DATFM_LEFTJ; break; |
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default: |
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dev_dbg(&aic26->spi->dev, "bad format\n"); return -EINVAL; |
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} |
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return 0; |
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} |
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/* --------------------------------------------------------------------- |
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* Digital Audio Interface Definition |
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*/ |
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#define AIC26_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\ |
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SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\ |
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SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\ |
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SNDRV_PCM_RATE_48000) |
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#define AIC26_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_BE |\ |
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SNDRV_PCM_FMTBIT_S24_BE | SNDRV_PCM_FMTBIT_S32_BE) |
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static const struct snd_soc_dai_ops aic26_dai_ops = { |
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.hw_params = aic26_hw_params, |
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.mute_stream = aic26_mute, |
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.set_sysclk = aic26_set_sysclk, |
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.set_fmt = aic26_set_fmt, |
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.no_capture_mute = 1, |
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}; |
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static struct snd_soc_dai_driver aic26_dai = { |
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.name = "tlv320aic26-hifi", |
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.playback = { |
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.stream_name = "Playback", |
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.channels_min = 2, |
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.channels_max = 2, |
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.rates = AIC26_RATES, |
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.formats = AIC26_FORMATS, |
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}, |
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.capture = { |
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.stream_name = "Capture", |
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.channels_min = 2, |
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.channels_max = 2, |
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.rates = AIC26_RATES, |
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.formats = AIC26_FORMATS, |
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}, |
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.ops = &aic26_dai_ops, |
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}; |
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/* --------------------------------------------------------------------- |
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* ALSA controls |
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*/ |
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static const char *aic26_capture_src_text[] = {"Mic", "Aux"}; |
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static SOC_ENUM_SINGLE_DECL(aic26_capture_src_enum, |
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AIC26_REG_AUDIO_CTRL1, 12, |
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aic26_capture_src_text); |
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static const struct snd_kcontrol_new aic26_snd_controls[] = { |
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/* Output */ |
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SOC_DOUBLE("PCM Playback Volume", AIC26_REG_DAC_GAIN, 8, 0, 0x7f, 1), |
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SOC_DOUBLE("PCM Playback Switch", AIC26_REG_DAC_GAIN, 15, 7, 1, 1), |
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SOC_SINGLE("PCM Capture Volume", AIC26_REG_ADC_GAIN, 8, 0x7f, 0), |
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SOC_SINGLE("PCM Capture Mute", AIC26_REG_ADC_GAIN, 15, 1, 1), |
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SOC_SINGLE("Keyclick activate", AIC26_REG_AUDIO_CTRL2, 15, 0x1, 0), |
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SOC_SINGLE("Keyclick amplitude", AIC26_REG_AUDIO_CTRL2, 12, 0x7, 0), |
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SOC_SINGLE("Keyclick frequency", AIC26_REG_AUDIO_CTRL2, 8, 0x7, 0), |
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SOC_SINGLE("Keyclick period", AIC26_REG_AUDIO_CTRL2, 4, 0xf, 0), |
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SOC_ENUM("Capture Source", aic26_capture_src_enum), |
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}; |
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/* --------------------------------------------------------------------- |
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* SPI device portion of driver: sysfs files for debugging |
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*/ |
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static ssize_t aic26_keyclick_show(struct device *dev, |
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struct device_attribute *attr, char *buf) |
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{ |
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struct aic26 *aic26 = dev_get_drvdata(dev); |
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int val, amp, freq, len; |
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val = snd_soc_component_read(aic26->component, AIC26_REG_AUDIO_CTRL2); |
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amp = (val >> 12) & 0x7; |
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freq = (125 << ((val >> 8) & 0x7)) >> 1; |
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len = 2 * (1 + ((val >> 4) & 0xf)); |
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return sprintf(buf, "amp=%x freq=%iHz len=%iclks\n", amp, freq, len); |
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} |
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/* Any write to the keyclick attribute will trigger the keyclick event */ |
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static ssize_t aic26_keyclick_set(struct device *dev, |
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struct device_attribute *attr, |
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const char *buf, size_t count) |
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{ |
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struct aic26 *aic26 = dev_get_drvdata(dev); |
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snd_soc_component_update_bits(aic26->component, AIC26_REG_AUDIO_CTRL2, |
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0x8000, 0x800); |
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return count; |
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} |
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static DEVICE_ATTR(keyclick, 0644, aic26_keyclick_show, aic26_keyclick_set); |
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/* --------------------------------------------------------------------- |
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* SoC CODEC portion of driver: probe and release routines |
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*/ |
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static int aic26_probe(struct snd_soc_component *component) |
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{ |
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struct aic26 *aic26 = dev_get_drvdata(component->dev); |
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int ret, reg; |
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aic26->component = component; |
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/* Reset the codec to power on defaults */ |
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snd_soc_component_write(component, AIC26_REG_RESET, 0xBB00); |
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/* Power up CODEC */ |
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snd_soc_component_write(component, AIC26_REG_POWER_CTRL, 0); |
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/* Audio Control 3 (master mode, fsref rate) */ |
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reg = snd_soc_component_read(component, AIC26_REG_AUDIO_CTRL3); |
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reg &= ~0xf800; |
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reg |= 0x0800; /* set master mode */ |
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snd_soc_component_write(component, AIC26_REG_AUDIO_CTRL3, reg); |
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/* Register the sysfs files for debugging */ |
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/* Create SysFS files */ |
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ret = device_create_file(component->dev, &dev_attr_keyclick); |
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if (ret) |
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dev_info(component->dev, "error creating sysfs files\n"); |
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return 0; |
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} |
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static const struct snd_soc_component_driver aic26_soc_component_dev = { |
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.probe = aic26_probe, |
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.controls = aic26_snd_controls, |
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.num_controls = ARRAY_SIZE(aic26_snd_controls), |
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.dapm_widgets = tlv320aic26_dapm_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(tlv320aic26_dapm_widgets), |
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.dapm_routes = tlv320aic26_dapm_routes, |
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.num_dapm_routes = ARRAY_SIZE(tlv320aic26_dapm_routes), |
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.idle_bias_on = 1, |
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.use_pmdown_time = 1, |
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.endianness = 1, |
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.non_legacy_dai_naming = 1, |
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}; |
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static const struct regmap_config aic26_regmap = { |
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.reg_bits = 16, |
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.val_bits = 16, |
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}; |
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/* --------------------------------------------------------------------- |
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* SPI device portion of driver: probe and release routines and SPI |
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* driver registration. |
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*/ |
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static int aic26_spi_probe(struct spi_device *spi) |
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{ |
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struct aic26 *aic26; |
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int ret; |
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dev_dbg(&spi->dev, "probing tlv320aic26 spi device\n"); |
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/* Allocate driver data */ |
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aic26 = devm_kzalloc(&spi->dev, sizeof *aic26, GFP_KERNEL); |
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if (!aic26) |
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return -ENOMEM; |
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aic26->regmap = devm_regmap_init_spi(spi, &aic26_regmap); |
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if (IS_ERR(aic26->regmap)) |
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return PTR_ERR(aic26->regmap); |
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/* Initialize the driver data */ |
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aic26->spi = spi; |
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dev_set_drvdata(&spi->dev, aic26); |
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aic26->master = 1; |
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ret = devm_snd_soc_register_component(&spi->dev, |
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&aic26_soc_component_dev, &aic26_dai, 1); |
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return ret; |
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} |
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static struct spi_driver aic26_spi = { |
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.driver = { |
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.name = "tlv320aic26-codec", |
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}, |
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.probe = aic26_spi_probe, |
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}; |
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module_spi_driver(aic26_spi);
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