// SPDX-License-Identifier: (GPL-2.0 OR MIT) // // Copyright (c) 2018 BayLibre, SAS. // Author: Jerome Brunet #include #include #include #include struct es7241_clock_mode { unsigned int rate_min; unsigned int rate_max; unsigned int *slv_mfs; unsigned int slv_mfs_num; unsigned int mst_mfs; unsigned int mst_m0:1; unsigned int mst_m1:1; }; struct es7241_chip { const struct es7241_clock_mode *modes; unsigned int mode_num; }; struct es7241_data { struct gpio_desc *reset; struct gpio_desc *m0; struct gpio_desc *m1; unsigned int fmt; unsigned int mclk; bool is_consumer; const struct es7241_chip *chip; }; static void es7241_set_mode(struct es7241_data *priv, int m0, int m1) { /* put the device in reset */ gpiod_set_value_cansleep(priv->reset, 0); /* set the mode */ gpiod_set_value_cansleep(priv->m0, m0); gpiod_set_value_cansleep(priv->m1, m1); /* take the device out of reset - datasheet does not specify a delay */ gpiod_set_value_cansleep(priv->reset, 1); } static int es7241_set_consumer_mode(struct es7241_data *priv, const struct es7241_clock_mode *mode, unsigned int mfs) { int j; if (!mfs) goto out_ok; for (j = 0; j < mode->slv_mfs_num; j++) { if (mode->slv_mfs[j] == mfs) goto out_ok; } return -EINVAL; out_ok: es7241_set_mode(priv, 1, 1); return 0; } static int es7241_set_provider_mode(struct es7241_data *priv, const struct es7241_clock_mode *mode, unsigned int mfs) { /* * We can't really set clock ratio, if the mclk/lrclk is different * from what we provide, then error out */ if (mfs && mfs != mode->mst_mfs) return -EINVAL; es7241_set_mode(priv, mode->mst_m0, mode->mst_m1); return 0; } static int es7241_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { struct es7241_data *priv = snd_soc_dai_get_drvdata(dai); unsigned int rate = params_rate(params); unsigned int mfs = priv->mclk / rate; int i; for (i = 0; i < priv->chip->mode_num; i++) { const struct es7241_clock_mode *mode = &priv->chip->modes[i]; if (rate < mode->rate_min || rate >= mode->rate_max) continue; if (priv->is_consumer) return es7241_set_consumer_mode(priv, mode, mfs); else return es7241_set_provider_mode(priv, mode, mfs); } /* should not happen */ dev_err(dai->dev, "unsupported rate: %u\n", rate); return -EINVAL; } static int es7241_set_sysclk(struct snd_soc_dai *dai, int clk_id, unsigned int freq, int dir) { struct es7241_data *priv = snd_soc_dai_get_drvdata(dai); if (dir == SND_SOC_CLOCK_IN && clk_id == 0) { priv->mclk = freq; return 0; } return -ENOTSUPP; } static int es7241_set_fmt(struct snd_soc_dai *dai, unsigned int fmt) { struct es7241_data *priv = snd_soc_dai_get_drvdata(dai); if ((fmt & SND_SOC_DAIFMT_INV_MASK) != SND_SOC_DAIFMT_NB_NF) { dev_err(dai->dev, "Unsupported dai clock inversion\n"); return -EINVAL; } if ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) != priv->fmt) { dev_err(dai->dev, "Invalid dai format\n"); return -EINVAL; } switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) { case SND_SOC_DAIFMT_CBC_CFC: priv->is_consumer = true; break; case SND_SOC_DAIFMT_CBP_CFP: priv->is_consumer = false; break; default: dev_err(dai->dev, "Unsupported clock configuration\n"); return -EINVAL; } return 0; } static const struct snd_soc_dai_ops es7241_dai_ops = { .set_fmt = es7241_set_fmt, .hw_params = es7241_hw_params, .set_sysclk = es7241_set_sysclk, }; static struct snd_soc_dai_driver es7241_dai = { .name = "es7241-hifi", .capture = { .stream_name = "Capture", .channels_min = 2, .channels_max = 2, .rates = SNDRV_PCM_RATE_8000_192000, .formats = (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE), }, .ops = &es7241_dai_ops, }; static const struct es7241_clock_mode es7241_modes[] = { { /* Single speed mode */ .rate_min = 8000, .rate_max = 50000, .slv_mfs = (unsigned int[]) { 256, 384, 512, 768, 1024 }, .slv_mfs_num = 5, .mst_mfs = 256, .mst_m0 = 0, .mst_m1 = 0, }, { /* Double speed mode */ .rate_min = 50000, .rate_max = 100000, .slv_mfs = (unsigned int[]) { 128, 192 }, .slv_mfs_num = 2, .mst_mfs = 128, .mst_m0 = 1, .mst_m1 = 0, }, { /* Quad speed mode */ .rate_min = 100000, .rate_max = 200000, .slv_mfs = (unsigned int[]) { 64 }, .slv_mfs_num = 1, .mst_mfs = 64, .mst_m0 = 0, .mst_m1 = 1, }, }; static const struct es7241_chip es7241_chip __maybe_unused = { .modes = es7241_modes, .mode_num = ARRAY_SIZE(es7241_modes), }; static const struct snd_soc_dapm_widget es7241_dapm_widgets[] = { SND_SOC_DAPM_INPUT("AINL"), SND_SOC_DAPM_INPUT("AINR"), SND_SOC_DAPM_DAC("ADC", "Capture", SND_SOC_NOPM, 0, 0), SND_SOC_DAPM_REGULATOR_SUPPLY("VDDP", 0, 0), SND_SOC_DAPM_REGULATOR_SUPPLY("VDDD", 0, 0), SND_SOC_DAPM_REGULATOR_SUPPLY("VDDA", 0, 0), }; static const struct snd_soc_dapm_route es7241_dapm_routes[] = { { "ADC", NULL, "AINL", }, { "ADC", NULL, "AINR", }, { "ADC", NULL, "VDDA", }, { "Capture", NULL, "VDDP", }, { "Capture", NULL, "VDDD", }, }; static const struct snd_soc_component_driver es7241_component_driver = { .dapm_widgets = es7241_dapm_widgets, .num_dapm_widgets = ARRAY_SIZE(es7241_dapm_widgets), .dapm_routes = es7241_dapm_routes, .num_dapm_routes = ARRAY_SIZE(es7241_dapm_routes), .idle_bias_on = 1, .endianness = 1, }; static void es7241_parse_fmt(struct device *dev, struct es7241_data *priv) { bool is_leftj; /* * The format is given by a pull resistor on the SDOUT pin: * pull-up for i2s, pull-down for left justified. */ is_leftj = of_property_read_bool(dev->of_node, "everest,sdout-pull-down"); if (is_leftj) priv->fmt = SND_SOC_DAIFMT_LEFT_J; else priv->fmt = SND_SOC_DAIFMT_I2S; } static int es7241_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct es7241_data *priv; priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL); if (!priv) return -ENOMEM; platform_set_drvdata(pdev, priv); priv->chip = of_device_get_match_data(dev); if (!priv->chip) { dev_err(dev, "failed to match device\n"); return -ENODEV; } es7241_parse_fmt(dev, priv); priv->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW); if (IS_ERR(priv->reset)) return dev_err_probe(dev, PTR_ERR(priv->reset), "Failed to get 'reset' gpio"); priv->m0 = devm_gpiod_get_optional(dev, "m0", GPIOD_OUT_LOW); if (IS_ERR(priv->m0)) return dev_err_probe(dev, PTR_ERR(priv->m0), "Failed to get 'm0' gpio"); priv->m1 = devm_gpiod_get_optional(dev, "m1", GPIOD_OUT_LOW); if (IS_ERR(priv->m1)) return dev_err_probe(dev, PTR_ERR(priv->m1), "Failed to get 'm1' gpio"); return devm_snd_soc_register_component(&pdev->dev, &es7241_component_driver, &es7241_dai, 1); } #ifdef CONFIG_OF static const struct of_device_id es7241_ids[] = { { .compatible = "everest,es7241", .data = &es7241_chip }, { } }; MODULE_DEVICE_TABLE(of, es7241_ids); #endif static struct platform_driver es7241_driver = { .driver = { .name = "es7241", .of_match_table = of_match_ptr(es7241_ids), }, .probe = es7241_probe, }; module_platform_driver(es7241_driver); MODULE_DESCRIPTION("ASoC ES7241 audio codec driver"); MODULE_AUTHOR("Jerome Brunet "); MODULE_LICENSE("GPL");