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 #define ADS117X_RATES (SNDRV_PCM_RATE_8000_48000) 24 #define ADS117X_FORMATS (SNDRV_PCM_FMTBIT_S16_LE) 25 26 static const struct snd_soc_dapm_widget ads117x_dapm_widgets[] = { 27 SND_SOC_DAPM_INPUT("Input1"), 28 SND_SOC_DAPM_INPUT("Input2"), 29 SND_SOC_DAPM_INPUT("Input3"), 30 SND_SOC_DAPM_INPUT("Input4"), 31 SND_SOC_DAPM_INPUT("Input5"), 32 SND_SOC_DAPM_INPUT("Input6"), 33 SND_SOC_DAPM_INPUT("Input7"), 34 SND_SOC_DAPM_INPUT("Input8"), 35 }; 36 37 static const struct snd_soc_dapm_route ads117x_dapm_routes[] = { 38 { "Capture", NULL, "Input1" }, 39 { "Capture", NULL, "Input2" }, 40 { "Capture", NULL, "Input3" }, 41 { "Capture", NULL, "Input4" }, 42 { "Capture", NULL, "Input5" }, 43 { "Capture", NULL, "Input6" }, 44 { "Capture", NULL, "Input7" }, 45 { "Capture", NULL, "Input8" }, 46 }; 47 48 static struct snd_soc_dai_driver ads117x_dai = { 49 /* ADC */ 50 .name = "ads117x-hifi", 51 .capture = { 52 .stream_name = "Capture", 53 .channels_min = 1, 54 .channels_max = 32, 55 .rates = ADS117X_RATES, 56 .formats = ADS117X_FORMATS,}, 57 }; 58 59 static struct snd_soc_codec_driver soc_codec_dev_ads117x = { 60 .dapm_widgets = ads117x_dapm_widgets, 61 .num_dapm_widgets = ARRAY_SIZE(ads117x_dapm_widgets), 62 .dapm_routes = ads117x_dapm_routes, 63 .num_dapm_routes = ARRAY_SIZE(ads117x_dapm_routes), 64 }; 65 66 static int ads117x_probe(struct platform_device *pdev) 67 { 68 return snd_soc_register_codec(&pdev->dev, 69 &soc_codec_dev_ads117x, &ads117x_dai, 1); 70 } 71 72 static int ads117x_remove(struct platform_device *pdev) 73 { 74 snd_soc_unregister_codec(&pdev->dev); 75 return 0; 76 } 77 78 static struct platform_driver ads117x_codec_driver = { 79 .driver = { 80 .name = "ads117x-codec", 81 .owner = THIS_MODULE, 82 }, 83 84 .probe = ads117x_probe, 85 .remove = ads117x_remove, 86 }; 87 88 module_platform_driver(ads117x_codec_driver); 89 90 MODULE_DESCRIPTION("ASoC ads117x driver"); 91 MODULE_AUTHOR("Graeme Gregory"); 92 MODULE_LICENSE("GPL"); 93