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_codec_driver soc_codec_dev_ads117x = { 62 .component_driver = { 63 .dapm_widgets = ads117x_dapm_widgets, 64 .num_dapm_widgets = ARRAY_SIZE(ads117x_dapm_widgets), 65 .dapm_routes = ads117x_dapm_routes, 66 .num_dapm_routes = ARRAY_SIZE(ads117x_dapm_routes), 67 }, 68 }; 69 70 static int ads117x_probe(struct platform_device *pdev) 71 { 72 return snd_soc_register_codec(&pdev->dev, 73 &soc_codec_dev_ads117x, &ads117x_dai, 1); 74 } 75 76 static int ads117x_remove(struct platform_device *pdev) 77 { 78 snd_soc_unregister_codec(&pdev->dev); 79 return 0; 80 } 81 82 #if defined(CONFIG_OF) 83 static const struct of_device_id ads117x_dt_ids[] = { 84 { .compatible = "ti,ads1174" }, 85 { .compatible = "ti,ads1178" }, 86 { }, 87 }; 88 MODULE_DEVICE_TABLE(of, ads117x_dt_ids); 89 #endif 90 91 static struct platform_driver ads117x_codec_driver = { 92 .driver = { 93 .name = "ads117x-codec", 94 .of_match_table = of_match_ptr(ads117x_dt_ids), 95 }, 96 97 .probe = ads117x_probe, 98 .remove = ads117x_remove, 99 }; 100 101 module_platform_driver(ads117x_codec_driver); 102 103 MODULE_DESCRIPTION("ASoC ads117x driver"); 104 MODULE_AUTHOR("Graeme Gregory"); 105 MODULE_LICENSE("GPL"); 106