1 /* 2 * wm8727.c 3 * 4 * Created on: 15-Oct-2009 5 * Author: neil.jones@imgtec.com 6 * 7 * Copyright (C) 2009 Imagination Technologies Ltd. 8 * 9 * This program is free software; you can redistribute it and/or modify it 10 * under the terms of the GNU General Public License as published by the 11 * Free Software Foundation; either version 2 of the License, or (at your 12 * option) any later version. 13 */ 14 15 #include <linux/init.h> 16 #include <linux/slab.h> 17 #include <linux/module.h> 18 #include <linux/kernel.h> 19 #include <linux/device.h> 20 #include <sound/core.h> 21 #include <sound/pcm.h> 22 #include <sound/ac97_codec.h> 23 #include <sound/initval.h> 24 #include <sound/soc.h> 25 26 static const struct snd_soc_dapm_widget wm8727_dapm_widgets[] = { 27 SND_SOC_DAPM_OUTPUT("VOUTL"), 28 SND_SOC_DAPM_OUTPUT("VOUTR"), 29 }; 30 31 static const struct snd_soc_dapm_route wm8727_dapm_routes[] = { 32 { "VOUTL", NULL, "Playback" }, 33 { "VOUTR", NULL, "Playback" }, 34 }; 35 36 /* 37 * Note this is a simple chip with no configuration interface, sample rate is 38 * determined automatically by examining the Master clock and Bit clock ratios 39 */ 40 #define WM8727_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\ 41 SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 |\ 42 SNDRV_PCM_RATE_192000) 43 44 45 static struct snd_soc_dai_driver wm8727_dai = { 46 .name = "wm8727-hifi", 47 .playback = { 48 .stream_name = "Playback", 49 .channels_min = 2, 50 .channels_max = 2, 51 .rates = WM8727_RATES, 52 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE, 53 }, 54 }; 55 56 static struct snd_soc_codec_driver soc_codec_dev_wm8727 = { 57 .dapm_widgets = wm8727_dapm_widgets, 58 .num_dapm_widgets = ARRAY_SIZE(wm8727_dapm_widgets), 59 .dapm_routes = wm8727_dapm_routes, 60 .num_dapm_routes = ARRAY_SIZE(wm8727_dapm_routes), 61 }; 62 63 static int wm8727_probe(struct platform_device *pdev) 64 { 65 return snd_soc_register_codec(&pdev->dev, 66 &soc_codec_dev_wm8727, &wm8727_dai, 1); 67 } 68 69 static int wm8727_remove(struct platform_device *pdev) 70 { 71 snd_soc_unregister_codec(&pdev->dev); 72 return 0; 73 } 74 75 static struct platform_driver wm8727_codec_driver = { 76 .driver = { 77 .name = "wm8727", 78 }, 79 80 .probe = wm8727_probe, 81 .remove = wm8727_remove, 82 }; 83 84 module_platform_driver(wm8727_codec_driver); 85 86 MODULE_DESCRIPTION("ASoC wm8727 driver"); 87 MODULE_AUTHOR("Neil Jones"); 88 MODULE_LICENSE("GPL"); 89