1 /* 2 * ads117x.c -- Driver for ads1174/8 ADC chips 3 * 4 * Copyright 2009 ShotSpotter Inc. 5 * Author: Graeme Gregory <gg@slimlogic.co.uk> 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the 9 * Free Software Foundation; either version 2 of the License, or (at your 10 * option) any later version. 11 */ 12 13 #include <linux/kernel.h> 14 #include <linux/slab.h> 15 #include <linux/init.h> 16 #include <linux/device.h> 17 #include <linux/module.h> 18 #include <sound/core.h> 19 #include <sound/pcm.h> 20 #include <sound/initval.h> 21 #include <sound/soc.h> 22 23 #include <linux/of.h> 24 25 #define ADS117X_RATES (SNDRV_PCM_RATE_8000_48000) 26 #define ADS117X_FORMATS (SNDRV_PCM_FMTBIT_S16_LE) 27 28 static const struct snd_soc_dapm_widget ads117x_dapm_widgets[] = { 29 SND_SOC_DAPM_INPUT("Input1"), 30 SND_SOC_DAPM_INPUT("Input2"), 31 SND_SOC_DAPM_INPUT("Input3"), 32 SND_SOC_DAPM_INPUT("Input4"), 33 SND_SOC_DAPM_INPUT("Input5"), 34 SND_SOC_DAPM_INPUT("Input6"), 35 SND_SOC_DAPM_INPUT("Input7"), 36 SND_SOC_DAPM_INPUT("Input8"), 37 }; 38 39 static const struct snd_soc_dapm_route ads117x_dapm_routes[] = { 40 { "Capture", NULL, "Input1" }, 41 { "Capture", NULL, "Input2" }, 42 { "Capture", NULL, "Input3" }, 43 { "Capture", NULL, "Input4" }, 44 { "Capture", NULL, "Input5" }, 45 { "Capture", NULL, "Input6" }, 46 { "Capture", NULL, "Input7" }, 47 { "Capture", NULL, "Input8" }, 48 }; 49 50 static struct snd_soc_dai_driver ads117x_dai = { 51 /* ADC */ 52 .name = "ads117x-hifi", 53 .capture = { 54 .stream_name = "Capture", 55 .channels_min = 1, 56 .channels_max = 32, 57 .rates = ADS117X_RATES, 58 .formats = ADS117X_FORMATS,}, 59 }; 60 61 static const struct snd_soc_component_driver soc_component_dev_ads117x = { 62 .dapm_widgets = ads117x_dapm_widgets, 63 .num_dapm_widgets = ARRAY_SIZE(ads117x_dapm_widgets), 64 .dapm_routes = ads117x_dapm_routes, 65 .num_dapm_routes = ARRAY_SIZE(ads117x_dapm_routes), 66 .idle_bias_on = 1, 67 .use_pmdown_time = 1, 68 .endianness = 1, 69 .non_legacy_dai_naming = 1, 70 }; 71 72 static int ads117x_probe(struct platform_device *pdev) 73 { 74 return devm_snd_soc_register_component(&pdev->dev, 75 &soc_component_dev_ads117x, &ads117x_dai, 1); 76 } 77 78 #if defined(CONFIG_OF) 79 static const struct of_device_id ads117x_dt_ids[] = { 80 { .compatible = "ti,ads1174" }, 81 { .compatible = "ti,ads1178" }, 82 { }, 83 }; 84 MODULE_DEVICE_TABLE(of, ads117x_dt_ids); 85 #endif 86 87 static struct platform_driver ads117x_codec_driver = { 88 .driver = { 89 .name = "ads117x-codec", 90 .of_match_table = of_match_ptr(ads117x_dt_ids), 91 }, 92 93 .probe = ads117x_probe, 94 }; 95 96 module_platform_driver(ads117x_codec_driver); 97 98 MODULE_DESCRIPTION("ASoC ads117x driver"); 99 MODULE_AUTHOR("Graeme Gregory"); 100 MODULE_LICENSE("GPL"); 101