1 2#include <linux/module.h> 3#include <sound/soc.h> 4 5#include <asm/mach-types.h> 6 7#include "../codecs/wm8940.h" 8#include "pxa2xx-i2s.h" 9#include "pxa2xx-pcm.h" 10 11static int imote2_asoc_hw_params(struct snd_pcm_substream *substream, 12 struct snd_pcm_hw_params *params) 13{ 14 struct snd_soc_pcm_runtime *rtd = substream->private_data; 15 struct snd_soc_dai *codec_dai = rtd->dai->codec_dai; 16 struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; 17 unsigned int clk = 0; 18 int ret; 19 20 switch (params_rate(params)) { 21 case 8000: 22 case 16000: 23 case 48000: 24 case 96000: 25 clk = 12288000; 26 break; 27 case 11025: 28 case 22050: 29 case 44100: 30 clk = 11289600; 31 break; 32 } 33 34 /* set codec DAI configuration */ 35 ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S 36 | SND_SOC_DAIFMT_NB_NF 37 | SND_SOC_DAIFMT_CBS_CFS); 38 if (ret < 0) 39 return ret; 40 41 /* CPU should be clock master */ 42 ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S 43 | SND_SOC_DAIFMT_NB_NF 44 | SND_SOC_DAIFMT_CBS_CFS); 45 if (ret < 0) 46 return ret; 47 48 ret = snd_soc_dai_set_sysclk(codec_dai, 0, clk, 49 SND_SOC_CLOCK_IN); 50 if (ret < 0) 51 return ret; 52 53 /* set the I2S system clock as input (unused) */ 54 ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, clk, 55 SND_SOC_CLOCK_OUT); 56 57 return ret; 58} 59 60static struct snd_soc_ops imote2_asoc_ops = { 61 .hw_params = imote2_asoc_hw_params, 62}; 63 64static struct snd_soc_dai_link imote2_dai = { 65 .name = "WM8940", 66 .stream_name = "WM8940", 67 .cpu_dai = &pxa_i2s_dai, 68 .codec_dai = &wm8940_dai, 69 .ops = &imote2_asoc_ops, 70}; 71 72static struct snd_soc_card snd_soc_imote2 = { 73 .name = "Imote2", 74 .platform = &pxa2xx_soc_platform, 75 .dai_link = &imote2_dai, 76 .num_links = 1, 77}; 78 79static struct snd_soc_device imote2_snd_devdata = { 80 .card = &snd_soc_imote2, 81 .codec_dev = &soc_codec_dev_wm8940, 82}; 83 84static struct platform_device *imote2_snd_device; 85 86static int __init imote2_asoc_init(void) 87{ 88 int ret; 89 90 if (!machine_is_intelmote2()) 91 return -ENODEV; 92 imote2_snd_device = platform_device_alloc("soc-audio", -1); 93 if (!imote2_snd_device) 94 return -ENOMEM; 95 96 platform_set_drvdata(imote2_snd_device, &imote2_snd_devdata); 97 imote2_snd_devdata.dev = &imote2_snd_device->dev; 98 ret = platform_device_add(imote2_snd_device); 99 if (ret) 100 platform_device_put(imote2_snd_device); 101 102 return ret; 103} 104module_init(imote2_asoc_init); 105 106static void __exit imote2_asoc_exit(void) 107{ 108 platform_device_unregister(imote2_snd_device); 109} 110module_exit(imote2_asoc_exit); 111 112MODULE_AUTHOR("Jonathan Cameron"); 113MODULE_DESCRIPTION("ALSA SoC Imote 2"); 114MODULE_LICENSE("GPL"); 115