soc/codecs/es7134.c

0001 // SPDX-License-Identifier: GPL-2.0-only
0002 /*
0003  * Copyright (c) 2017 BayLibre, SAS.
0004  * Author: Jerome Brunet <jbrunet@baylibre.com>
0005  */
0006
0007 #include <linux/of_platform.h>
0008 #include <linux/module.h>
0009 #include <sound/soc.h>
0010
0011 /*
0012  * The everest 7134 is a very simple DA converter with no register
0013  */
0014
0015 struct es7134_clock_mode {
0016     unsigned int rate_min;
0017     unsigned int rate_max;
0018     unsigned int *mclk_fs;
0019     unsigned int mclk_fs_num;
0020 };
0021
0022 struct es7134_chip {
0023     struct snd_soc_dai_driver *dai_drv;
0024     const struct es7134_clock_mode *modes;
0025     unsigned int mode_num;
0026     const struct snd_soc_dapm_widget *extra_widgets;
0027     unsigned int extra_widget_num;
0028     const struct snd_soc_dapm_route *extra_routes;
0029     unsigned int extra_route_num;
0030 };
0031
0032 struct es7134_data {
0033     unsigned int mclk;
0034     const struct es7134_chip *chip;
0035 };
0036
0037 static int es7134_check_mclk(struct snd_soc_dai *dai,
0038                  struct es7134_data *priv,
0039                  unsigned int rate)
0040 {
0041     unsigned int mfs = priv->mclk / rate;
0042     int i, j;
0043
0044     for (i = 0; i < priv->chip->mode_num; i++) {
0045         const struct es7134_clock_mode *mode = &priv->chip->modes[i];
0046
0047         if (rate < mode->rate_min || rate > mode->rate_max)
0048             continue;
0049
0050         for (j = 0; j < mode->mclk_fs_num; j++) {
0051             if (mode->mclk_fs[j] == mfs)
0052                 return 0;
0053         }
0054
0055         dev_err(dai->dev, "unsupported mclk_fs %u for rate %u\n",
0056             mfs, rate);
0057         return -EINVAL;
0058     }
0059
0060     /* should not happen */
0061     dev_err(dai->dev, "unsupported rate: %u\n", rate);
0062     return -EINVAL;
0063 }
0064
0065 static int es7134_hw_params(struct snd_pcm_substream *substream,
0066                 struct snd_pcm_hw_params *params,
0067                 struct snd_soc_dai *dai)
0068 {
0069     struct es7134_data *priv = snd_soc_dai_get_drvdata(dai);
0070
0071     /* mclk has not been provided, assume it is OK */
0072     if (!priv->mclk)
0073         return 0;
0074
0075     return es7134_check_mclk(dai, priv, params_rate(params));
0076 }
0077
0078 static int es7134_set_sysclk(struct snd_soc_dai *dai, int clk_id,
0079                  unsigned int freq, int dir)
0080 {
0081     struct es7134_data *priv = snd_soc_dai_get_drvdata(dai);
0082
0083     if (dir == SND_SOC_CLOCK_IN && clk_id == 0) {
0084         priv->mclk = freq;
0085         return 0;
0086     }
0087
0088     return -ENOTSUPP;
0089 }
0090
0091 static int es7134_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
0092 {
0093     fmt &= (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK |
0094         SND_SOC_DAIFMT_MASTER_MASK);
0095
0096     if (fmt != (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
0097             SND_SOC_DAIFMT_CBC_CFC)) {
0098         dev_err(codec_dai->dev, "Invalid DAI format\n");
0099         return -EINVAL;
0100     }
0101
0102     return 0;
0103 }
0104
0105 static int es7134_component_probe(struct snd_soc_component *c)
0106 {
0107     struct snd_soc_dapm_context *dapm = snd_soc_component_get_dapm(c);
0108     struct es7134_data *priv = snd_soc_component_get_drvdata(c);
0109     const struct es7134_chip *chip = priv->chip;
0110     int ret;
0111
0112     if (chip->extra_widget_num) {
0113         ret = snd_soc_dapm_new_controls(dapm, chip->extra_widgets,
0114                         chip->extra_widget_num);
0115         if (ret) {
0116             dev_err(c->dev, "failed to add extra widgets\n");
0117             return ret;
0118         }
0119     }
0120
0121     if (chip->extra_route_num) {
0122         ret = snd_soc_dapm_add_routes(dapm, chip->extra_routes,
0123                           chip->extra_route_num);
0124         if (ret) {
0125             dev_err(c->dev, "failed to add extra routes\n");
0126             return ret;
0127         }
0128     }
0129
0130     return 0;
0131 }
0132
0133 static const struct snd_soc_dai_ops es7134_dai_ops = {
0134     .set_fmt    = es7134_set_fmt,
0135     .hw_params  = es7134_hw_params,
0136     .set_sysclk = es7134_set_sysclk,
0137 };
0138
0139 static struct snd_soc_dai_driver es7134_dai = {
0140     .name = "es7134-hifi",
0141     .playback = {
0142         .stream_name = "Playback",
0143         .channels_min = 2,
0144         .channels_max = 2,
0145         .rates = (SNDRV_PCM_RATE_8000_48000 |
0146               SNDRV_PCM_RATE_88200      |
0147               SNDRV_PCM_RATE_96000      |
0148               SNDRV_PCM_RATE_176400     |
0149               SNDRV_PCM_RATE_192000),
0150         .formats = (SNDRV_PCM_FMTBIT_S16_LE  |
0151                 SNDRV_PCM_FMTBIT_S18_3LE |
0152                 SNDRV_PCM_FMTBIT_S20_3LE |
0153                 SNDRV_PCM_FMTBIT_S24_3LE |
0154                 SNDRV_PCM_FMTBIT_S24_LE),
0155     },
0156     .ops = &es7134_dai_ops,
0157 };
0158
0159 static const struct es7134_clock_mode es7134_modes[] = {
0160     {
0161         /* Single speed mode */
0162         .rate_min = 8000,
0163         .rate_max = 50000,
0164         .mclk_fs = (unsigned int[]) { 256, 384, 512, 768, 1024 },
0165         .mclk_fs_num = 5,
0166     }, {
0167         /* Double speed mode */
0168         .rate_min = 84000,
0169         .rate_max = 100000,
0170         .mclk_fs = (unsigned int[]) { 128, 192, 256, 384, 512 },
0171         .mclk_fs_num = 5,
0172     }, {
0173         /* Quad speed mode */
0174         .rate_min = 167000,
0175         .rate_max = 192000,
0176         .mclk_fs = (unsigned int[]) { 128, 192, 256 },
0177         .mclk_fs_num = 3,
0178     },
0179 };
0180
0181 /* Digital I/O are also supplied by VDD on the es7134 */
0182 static const struct snd_soc_dapm_route es7134_extra_routes[] = {
0183     { "Playback", NULL, "VDD", }
0184 };
0185
0186 static const struct es7134_chip es7134_chip __maybe_unused = {
0187     .dai_drv = &es7134_dai,
0188     .modes = es7134_modes,
0189     .mode_num = ARRAY_SIZE(es7134_modes),
0190     .extra_routes = es7134_extra_routes,
0191     .extra_route_num = ARRAY_SIZE(es7134_extra_routes),
0192 };
0193
0194 static const struct snd_soc_dapm_widget es7134_dapm_widgets[] = {
0195     SND_SOC_DAPM_OUTPUT("AOUTL"),
0196     SND_SOC_DAPM_OUTPUT("AOUTR"),
0197     SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
0198     SND_SOC_DAPM_REGULATOR_SUPPLY("VDD", 0, 0),
0199 };
0200
0201 static const struct snd_soc_dapm_route es7134_dapm_routes[] = {
0202     { "AOUTL", NULL, "DAC" },
0203     { "AOUTR", NULL, "DAC" },
0204     { "DAC", NULL, "VDD" },
0205 };
0206
0207 static const struct snd_soc_component_driver es7134_component_driver = {
0208     .probe          = es7134_component_probe,
0209     .dapm_widgets       = es7134_dapm_widgets,
0210     .num_dapm_widgets   = ARRAY_SIZE(es7134_dapm_widgets),
0211     .dapm_routes        = es7134_dapm_routes,
0212     .num_dapm_routes    = ARRAY_SIZE(es7134_dapm_routes),
0213     .idle_bias_on       = 1,
0214     .use_pmdown_time    = 1,
0215     .endianness     = 1,
0216 };
0217
0218 static struct snd_soc_dai_driver es7154_dai = {
0219     .name = "es7154-hifi",
0220     .playback = {
0221         .stream_name = "Playback",
0222         .channels_min = 2,
0223         .channels_max = 2,
0224         .rates = (SNDRV_PCM_RATE_8000_48000 |
0225               SNDRV_PCM_RATE_88200      |
0226               SNDRV_PCM_RATE_96000),
0227         .formats = (SNDRV_PCM_FMTBIT_S16_LE  |
0228                 SNDRV_PCM_FMTBIT_S18_3LE |
0229                 SNDRV_PCM_FMTBIT_S20_3LE |
0230                 SNDRV_PCM_FMTBIT_S24_3LE |
0231                 SNDRV_PCM_FMTBIT_S24_LE),
0232     },
0233     .ops = &es7134_dai_ops,
0234 };
0235
0236 static const struct es7134_clock_mode es7154_modes[] = {
0237     {
0238         /* Single speed mode */
0239         .rate_min = 8000,
0240         .rate_max = 50000,
0241         .mclk_fs = (unsigned int[]) { 32, 64, 128, 192, 256,
0242                           384, 512, 768, 1024 },
0243         .mclk_fs_num = 9,
0244     }, {
0245         /* Double speed mode */
0246         .rate_min = 84000,
0247         .rate_max = 100000,
0248         .mclk_fs = (unsigned int[]) { 128, 192, 256, 384, 512,
0249                           768, 1024},
0250         .mclk_fs_num = 7,
0251     }
0252 };
0253
0254 /* Es7154 has a separate supply for digital I/O  */
0255 static const struct snd_soc_dapm_widget es7154_extra_widgets[] = {
0256     SND_SOC_DAPM_REGULATOR_SUPPLY("PVDD", 0, 0),
0257 };
0258
0259 static const struct snd_soc_dapm_route es7154_extra_routes[] = {
0260     { "Playback", NULL, "PVDD", }
0261 };
0262
0263 static const struct es7134_chip es7154_chip __maybe_unused = {
0264     .dai_drv = &es7154_dai,
0265     .modes = es7154_modes,
0266     .mode_num = ARRAY_SIZE(es7154_modes),
0267     .extra_routes = es7154_extra_routes,
0268     .extra_route_num = ARRAY_SIZE(es7154_extra_routes),
0269     .extra_widgets = es7154_extra_widgets,
0270     .extra_widget_num = ARRAY_SIZE(es7154_extra_widgets),
0271 };
0272
0273 static int es7134_probe(struct platform_device *pdev)
0274 {
0275     struct device *dev = &pdev->dev;
0276     struct es7134_data *priv;
0277
0278     priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
0279     if (!priv)
0280         return -ENOMEM;
0281     platform_set_drvdata(pdev, priv);
0282
0283     priv->chip = of_device_get_match_data(dev);
0284     if (!priv->chip) {
0285         dev_err(dev, "failed to match device\n");
0286         return -ENODEV;
0287     }
0288
0289     return devm_snd_soc_register_component(&pdev->dev,
0290                       &es7134_component_driver,
0291                       priv->chip->dai_drv, 1);
0292 }
0293
0294 #ifdef CONFIG_OF
0295 static const struct of_device_id es7134_ids[] = {
0296     { .compatible = "everest,es7134", .data = &es7134_chip },
0297     { .compatible = "everest,es7144", .data = &es7134_chip },
0298     { .compatible = "everest,es7154", .data = &es7154_chip },
0299     { }
0300 };
0301 MODULE_DEVICE_TABLE(of, es7134_ids);
0302 #endif
0303
0304 static struct platform_driver es7134_driver = {
0305     .driver = {
0306         .name = "es7134",
0307         .of_match_table = of_match_ptr(es7134_ids),
0308     },
0309     .probe = es7134_probe,
0310 };
0311
0312 module_platform_driver(es7134_driver);
0313
0314 MODULE_DESCRIPTION("ASoC ES7134 audio codec driver");
0315 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>");
0316 MODULE_LICENSE("GPL");