1 /* 2 * Copyright (c) 2017 BayLibre, SAS. 3 * Author: Jerome Brunet <jbrunet@baylibre.com> 4 * 5 * This program is free software; you can redistribute it and/or modify 6 * it under the terms of version 2 of the GNU General Public License as 7 * published by the Free Software Foundation. 8 * 9 * This program is distributed in the hope that it will be useful, but 10 * WITHOUT ANY WARRANTY; without even the implied warranty of 11 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 12 * General Public License for more details. 13 * 14 * You should have received a copy of the GNU General Public License 15 * along with this program; if not, see <http://www.gnu.org/licenses/>. 16 * The full GNU General Public License is included in this distribution 17 * in the file called COPYING. 18 */ 19 20 #include <linux/module.h> 21 #include <sound/soc.h> 22 23 /* 24 * The everest 7134 is a very simple DA converter with no register 25 */ 26 27 static int es7134_set_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) 28 { 29 fmt &= (SND_SOC_DAIFMT_FORMAT_MASK | SND_SOC_DAIFMT_INV_MASK | 30 SND_SOC_DAIFMT_MASTER_MASK); 31 32 if (fmt != (SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | 33 SND_SOC_DAIFMT_CBS_CFS)) { 34 dev_err(codec_dai->dev, "Invalid DAI format\n"); 35 return -EINVAL; 36 } 37 38 return 0; 39 } 40 41 static const struct snd_soc_dai_ops es7134_dai_ops = { 42 .set_fmt = es7134_set_fmt, 43 }; 44 45 static struct snd_soc_dai_driver es7134_dai = { 46 .name = "es7134-hifi", 47 .playback = { 48 .stream_name = "Playback", 49 .channels_min = 2, 50 .channels_max = 2, 51 .rates = SNDRV_PCM_RATE_8000_192000, 52 .formats = (SNDRV_PCM_FMTBIT_S16_LE | 53 SNDRV_PCM_FMTBIT_S18_3LE | 54 SNDRV_PCM_FMTBIT_S20_3LE | 55 SNDRV_PCM_FMTBIT_S24_3LE | 56 SNDRV_PCM_FMTBIT_S24_LE), 57 }, 58 .ops = &es7134_dai_ops, 59 }; 60 61 static const struct snd_soc_dapm_widget es7134_dapm_widgets[] = { 62 SND_SOC_DAPM_OUTPUT("AOUTL"), 63 SND_SOC_DAPM_OUTPUT("AOUTR"), 64 SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0), 65 }; 66 67 static const struct snd_soc_dapm_route es7134_dapm_routes[] = { 68 { "AOUTL", NULL, "DAC" }, 69 { "AOUTR", NULL, "DAC" }, 70 }; 71 72 static const struct snd_soc_component_driver es7134_component_driver = { 73 .dapm_widgets = es7134_dapm_widgets, 74 .num_dapm_widgets = ARRAY_SIZE(es7134_dapm_widgets), 75 .dapm_routes = es7134_dapm_routes, 76 .num_dapm_routes = ARRAY_SIZE(es7134_dapm_routes), 77 .idle_bias_on = 1, 78 .use_pmdown_time = 1, 79 .endianness = 1, 80 .non_legacy_dai_naming = 1, 81 }; 82 83 static int es7134_probe(struct platform_device *pdev) 84 { 85 return devm_snd_soc_register_component(&pdev->dev, 86 &es7134_component_driver, 87 &es7134_dai, 1); 88 } 89 90 #ifdef CONFIG_OF 91 static const struct of_device_id es7134_ids[] = { 92 { .compatible = "everest,es7134", }, 93 { .compatible = "everest,es7144", }, 94 { } 95 }; 96 MODULE_DEVICE_TABLE(of, es7134_ids); 97 #endif 98 99 static struct platform_driver es7134_driver = { 100 .driver = { 101 .name = "es7134", 102 .of_match_table = of_match_ptr(es7134_ids), 103 }, 104 .probe = es7134_probe, 105 }; 106 107 module_platform_driver(es7134_driver); 108 109 MODULE_DESCRIPTION("ASoC ES7134 audio codec driver"); 110 MODULE_AUTHOR("Jerome Brunet <jbrunet@baylibre.com>"); 111 MODULE_LICENSE("GPL"); 112