313 lines
7.3 KiB
C
313 lines
7.3 KiB
C
// SPDX-License-Identifier: (GPL-2.0 OR MIT)
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//
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// Copyright (c) 2018 BayLibre, SAS.
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// Author: Jerome Brunet <jbrunet@baylibre.com>
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#include <linux/gpio/consumer.h>
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#include <linux/of_platform.h>
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#include <linux/module.h>
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#include <sound/soc.h>
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struct es7241_clock_mode {
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unsigned int rate_min;
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unsigned int rate_max;
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unsigned int *slv_mfs;
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unsigned int slv_mfs_num;
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unsigned int mst_mfs;
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unsigned int mst_m0:1;
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unsigned int mst_m1:1;
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};
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struct es7241_chip {
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const struct es7241_clock_mode *modes;
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unsigned int mode_num;
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};
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struct es7241_data {
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struct gpio_desc *reset;
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struct gpio_desc *m0;
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struct gpio_desc *m1;
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unsigned int fmt;
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unsigned int mclk;
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bool is_slave;
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const struct es7241_chip *chip;
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};
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static void es7241_set_mode(struct es7241_data *priv, int m0, int m1)
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{
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/* put the device in reset */
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gpiod_set_value_cansleep(priv->reset, 0);
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/* set the mode */
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gpiod_set_value_cansleep(priv->m0, m0);
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gpiod_set_value_cansleep(priv->m1, m1);
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/* take the device out of reset - datasheet does not specify a delay */
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gpiod_set_value_cansleep(priv->reset, 1);
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}
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static int es7241_set_slave_mode(struct es7241_data *priv,
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const struct es7241_clock_mode *mode,
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unsigned int mfs)
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{
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int j;
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if (!mfs)
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goto out_ok;
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for (j = 0; j < mode->slv_mfs_num; j++) {
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if (mode->slv_mfs[j] == mfs)
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goto out_ok;
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}
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return -EINVAL;
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out_ok:
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es7241_set_mode(priv, 1, 1);
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return 0;
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}
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static int es7241_set_master_mode(struct es7241_data *priv,
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const struct es7241_clock_mode *mode,
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unsigned int mfs)
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{
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/*
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* We can't really set clock ratio, if the mclk/lrclk is different
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* from what we provide, then error out
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*/
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if (mfs && mfs != mode->mst_mfs)
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return -EINVAL;
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es7241_set_mode(priv, mode->mst_m0, mode->mst_m1);
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return 0;
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}
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static int es7241_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 es7241_data *priv = snd_soc_dai_get_drvdata(dai);
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unsigned int rate = params_rate(params);
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unsigned int mfs = priv->mclk / rate;
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int i;
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for (i = 0; i < priv->chip->mode_num; i++) {
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const struct es7241_clock_mode *mode = &priv->chip->modes[i];
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if (rate < mode->rate_min || rate >= mode->rate_max)
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continue;
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if (priv->is_slave)
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return es7241_set_slave_mode(priv, mode, mfs);
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else
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return es7241_set_master_mode(priv, mode, mfs);
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}
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/* should not happen */
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dev_err(dai->dev, "unsupported rate: %u\n", rate);
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return -EINVAL;
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}
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static int es7241_set_sysclk(struct snd_soc_dai *dai, int clk_id,
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unsigned int freq, int dir)
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{
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struct es7241_data *priv = snd_soc_dai_get_drvdata(dai);
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if (dir == SND_SOC_CLOCK_IN && clk_id == 0) {
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priv->mclk = freq;
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return 0;
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}
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return -ENOTSUPP;
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}
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static int es7241_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
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{
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struct es7241_data *priv = snd_soc_dai_get_drvdata(dai);
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if ((fmt & SND_SOC_DAIFMT_INV_MASK) != SND_SOC_DAIFMT_NB_NF) {
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dev_err(dai->dev, "Unsupported dai clock inversion\n");
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return -EINVAL;
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}
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if ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) != priv->fmt) {
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dev_err(dai->dev, "Invalid dai format\n");
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return -EINVAL;
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}
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switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
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case SND_SOC_DAIFMT_CBS_CFS:
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priv->is_slave = true;
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break;
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case SND_SOC_DAIFMT_CBM_CFM:
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priv->is_slave = false;
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break;
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default:
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dev_err(dai->dev, "Unsupported clock configuration\n");
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return -EINVAL;
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}
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return 0;
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}
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static const struct snd_soc_dai_ops es7241_dai_ops = {
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.set_fmt = es7241_set_fmt,
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.hw_params = es7241_hw_params,
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.set_sysclk = es7241_set_sysclk,
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};
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static struct snd_soc_dai_driver es7241_dai = {
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.name = "es7241-hifi",
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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 = SNDRV_PCM_RATE_8000_192000,
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.formats = (SNDRV_PCM_FMTBIT_S16_LE |
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SNDRV_PCM_FMTBIT_S24_3LE |
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SNDRV_PCM_FMTBIT_S24_LE),
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},
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.ops = &es7241_dai_ops,
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};
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static const struct es7241_clock_mode es7241_modes[] = {
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{
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/* Single speed mode */
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.rate_min = 8000,
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.rate_max = 50000,
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.slv_mfs = (unsigned int[]) { 256, 384, 512, 768, 1024 },
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.slv_mfs_num = 5,
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.mst_mfs = 256,
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.mst_m0 = 0,
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.mst_m1 = 0,
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}, {
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/* Double speed mode */
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.rate_min = 50000,
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.rate_max = 100000,
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.slv_mfs = (unsigned int[]) { 128, 192 },
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.slv_mfs_num = 2,
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.mst_mfs = 128,
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.mst_m0 = 1,
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.mst_m1 = 0,
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}, {
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/* Quad speed mode */
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.rate_min = 100000,
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.rate_max = 200000,
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.slv_mfs = (unsigned int[]) { 64 },
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.slv_mfs_num = 1,
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.mst_mfs = 64,
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.mst_m0 = 0,
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.mst_m1 = 1,
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},
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};
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static const struct es7241_chip es7241_chip __maybe_unused = {
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.modes = es7241_modes,
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.mode_num = ARRAY_SIZE(es7241_modes),
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};
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static const struct snd_soc_dapm_widget es7241_dapm_widgets[] = {
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SND_SOC_DAPM_INPUT("AINL"),
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SND_SOC_DAPM_INPUT("AINR"),
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SND_SOC_DAPM_DAC("ADC", "Capture", SND_SOC_NOPM, 0, 0),
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SND_SOC_DAPM_REGULATOR_SUPPLY("VDDP", 0, 0),
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SND_SOC_DAPM_REGULATOR_SUPPLY("VDDD", 0, 0),
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SND_SOC_DAPM_REGULATOR_SUPPLY("VDDA", 0, 0),
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};
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static const struct snd_soc_dapm_route es7241_dapm_routes[] = {
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{ "ADC", NULL, "AINL", },
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{ "ADC", NULL, "AINR", },
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{ "ADC", NULL, "VDDA", },
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{ "Capture", NULL, "VDDP", },
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{ "Capture", NULL, "VDDD", },
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};
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static const struct snd_soc_component_driver es7241_component_driver = {
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.dapm_widgets = es7241_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(es7241_dapm_widgets),
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.dapm_routes = es7241_dapm_routes,
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.num_dapm_routes = ARRAY_SIZE(es7241_dapm_routes),
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.idle_bias_on = 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 void es7241_parse_fmt(struct device *dev, struct es7241_data *priv)
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{
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bool is_leftj;
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/*
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* The format is given by a pull resistor on the SDOUT pin:
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* pull-up for i2s, pull-down for left justified.
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*/
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is_leftj = of_property_read_bool(dev->of_node,
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"everest,sdout-pull-down");
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if (is_leftj)
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priv->fmt = SND_SOC_DAIFMT_LEFT_J;
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else
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priv->fmt = SND_SOC_DAIFMT_I2S;
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}
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static int es7241_probe(struct platform_device *pdev)
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{
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struct device *dev = &pdev->dev;
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struct es7241_data *priv;
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priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
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if (!priv)
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return -ENOMEM;
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platform_set_drvdata(pdev, priv);
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priv->chip = of_device_get_match_data(dev);
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if (!priv->chip) {
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dev_err(dev, "failed to match device\n");
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return -ENODEV;
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}
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es7241_parse_fmt(dev, priv);
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priv->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
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if (IS_ERR(priv->reset))
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return dev_err_probe(dev, PTR_ERR(priv->reset),
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"Failed to get 'reset' gpio");
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priv->m0 = devm_gpiod_get_optional(dev, "m0", GPIOD_OUT_LOW);
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if (IS_ERR(priv->m0))
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return dev_err_probe(dev, PTR_ERR(priv->m0),
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"Failed to get 'm0' gpio");
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priv->m1 = devm_gpiod_get_optional(dev, "m1", GPIOD_OUT_LOW);
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if (IS_ERR(priv->m1))
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return dev_err_probe(dev, PTR_ERR(priv->m1),
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"Failed to get 'm1' gpio");
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return devm_snd_soc_register_component(&pdev->dev,
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&es7241_component_driver,
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&es7241_dai, 1);
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}
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#ifdef CONFIG_OF
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static const struct of_device_id es7241_ids[] = {
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{ .compatible = "everest,es7241", .data = &es7241_chip },
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{ }
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};
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MODULE_DEVICE_TABLE(of, es7241_ids);
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#endif
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static struct platform_driver es7241_driver = {
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.driver = {
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.name = "es7241",
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.of_match_table = of_match_ptr(es7241_ids),
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},
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.probe = es7241_probe,
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};
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module_platform_driver(es7241_driver);
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MODULE_DESCRIPTION("ASoC ES7241 audio codec driver");
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MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
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MODULE_LICENSE("GPL");
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