/* * Copyright (c) 2017 BayLibre, SAS. * Author: Jerome Brunet * * This program is free software; you can redistribute it and/or modify * it under the terms of version 2 of the GNU General Public License as * published by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, see . * The full GNU General Public License is included in this distribution * in the file called COPYING. */ #include #include #include /* * The everest 7134 is a very simple DA converter with no register */ struct es7134_clock_mode { unsigned int rate_min; unsigned int rate_max; unsigned int *mclk_fs; unsigned int mclk_fs_num; }; struct es7134_chip { const struct es7134_clock_mode *modes; unsigned int mode_num; const struct snd_soc_dapm_widget *extra_widgets; unsigned int extra_widget_num; const struct snd_soc_dapm_route *extra_routes; unsigned int extra_route_num; }; struct es7134_data { unsigned int mclk; const struct es7134_chip *chip; }; static int es7134_check_mclk(struct snd_soc_dai *dai, struct es7134_data *priv, unsigned int rate) { unsigned int mfs = priv->mclk / rate; int i, j; for (i = 0; i < priv->chip->mode_num; i++) { const struct es7134_clock_mode *mode = &priv->chip->modes[i]; if (rate < mode->rate_min || rate > mode->rate_max) continue; for (j = 0; j < mode->mclk_fs_num; j++) { if (mode->mclk_fs[j] == mfs) return 0; } dev_err(dai->dev, "unsupported mclk_fs %u for rate %u\n", mfs, rate); return -EINVAL; } /* should not happen */ dev_err(dai->dev, "unsupported rate: %u\n", rate); return -EINVAL; } static int es7134_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { struct es7134_data *priv = snd_soc_dai_get_drvdata(dai); /* mclk has not been provided, assume it is OK */ if (!priv->mclk) return 0; return es7134_check_mclk(dai, priv, params_rate(params)); } static int es7134_set_sysclk(struct snd_soc_dai *dai, int clk_id, unsigned int freq, int dir) { struct es7134_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 es7134_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) { fmt &= (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK | SND_SOC_DAIFMT_MASTER_MASK); if (fmt != (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS)) { dev_err(codec_dai->dev, "Invalid DAI format\n"); return -EINVAL; } return 0; } static int es7134_component_probe(struct snd_soc_component *c) { struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(c); struct es7134_data *priv = snd_soc_component_get_drvdata(c); const struct es7134_chip *chip = priv->chip; int ret; if (chip->extra_widget_num) { ret = snd_soc_dapm_new_controls(dapm, chip->extra_widgets, chip->extra_widget_num); if (ret) { dev_err(c->dev, "failed to add extra widgets\n"); return ret; } } if (chip->extra_route_num) { ret = snd_soc_dapm_add_routes(dapm, chip->extra_routes, chip->extra_route_num); if (ret) { dev_err(c->dev, "failed to add extra routes\n"); return ret; } } return 0; } static const struct snd_soc_dai_ops es7134_dai_ops = { .set_fmt = es7134_set_fmt, .hw_params = es7134_hw_params, .set_sysclk = es7134_set_sysclk, }; static struct snd_soc_dai_driver es7134_dai = { .name = "es7134-hifi", .playback = { .stream_name = "Playback", .channels_min = 2, .channels_max = 2, .rates = (SNDRV_PCM_RATE_8000_48000 | SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000), .formats = (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S18_3LE | SNDRV_PCM_FMTBIT_S20_3LE | SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_LE), }, .ops = &es7134_dai_ops, }; static const struct es7134_clock_mode es7134_modes[] = { { /* Single speed mode */ .rate_min = 8000, .rate_max = 50000, .mclk_fs = (unsigned int[]) { 256, 384, 512, 768, 1024 }, .mclk_fs_num = 5, }, { /* Double speed mode */ .rate_min = 84000, .rate_max = 100000, .mclk_fs = (unsigned int[]) { 128, 192, 256, 384, 512 }, .mclk_fs_num = 5, }, { /* Quad speed mode */ .rate_min = 167000, .rate_max = 192000, .mclk_fs = (unsigned int[]) { 128, 192, 256 }, .mclk_fs_num = 3, }, }; /* Digital I/O are also supplied by VDD on the es7134 */ static const struct snd_soc_dapm_route es7134_extra_routes[] = { { "Playback", NULL, "VDD", } }; static const struct es7134_chip es7134_chip = { .modes = es7134_modes, .mode_num = ARRAY_SIZE(es7134_modes), .extra_routes = es7134_extra_routes, .extra_route_num = ARRAY_SIZE(es7134_extra_routes), }; static const struct snd_soc_dapm_widget es7134_dapm_widgets[] = { SND_SOC_DAPM_OUTPUT("AOUTL"), SND_SOC_DAPM_OUTPUT("AOUTR"), SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0), SND_SOC_DAPM_REGULATOR_SUPPLY("VDD", 0, 0), }; static const struct snd_soc_dapm_route es7134_dapm_routes[] = { { "AOUTL", NULL, "DAC" }, { "AOUTR", NULL, "DAC" }, { "DAC", NULL, "VDD" }, }; static const struct snd_soc_component_driver es7134_component_driver = { .probe = es7134_component_probe, .dapm_widgets = es7134_dapm_widgets, .num_dapm_widgets = ARRAY_SIZE(es7134_dapm_widgets), .dapm_routes = es7134_dapm_routes, .num_dapm_routes = ARRAY_SIZE(es7134_dapm_routes), .idle_bias_on = 1, .use_pmdown_time = 1, .endianness = 1, .non_legacy_dai_naming = 1, }; static int es7134_probe(struct platform_device *pdev) { struct device *dev = &pdev->dev; struct es7134_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; } return devm_snd_soc_register_component(&pdev->dev, &es7134_component_driver, &es7134_dai, 1); } #ifdef CONFIG_OF static const struct of_device_id es7134_ids[] = { { .compatible = "everest,es7134", .data = &es7134_chip }, { .compatible = "everest,es7144", .data = &es7134_chip }, { } }; MODULE_DEVICE_TABLE(of, es7134_ids); #endif static struct platform_driver es7134_driver = { .driver = { .name = "es7134", .of_match_table = of_match_ptr(es7134_ids), }, .probe = es7134_probe, }; module_platform_driver(es7134_driver); MODULE_DESCRIPTION("ASoC ES7134 audio codec driver"); MODULE_AUTHOR("Jerome Brunet "); MODULE_LICENSE("GPL");