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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 | #include <linux/module.h> #include <sound/soc.h> #include <asm/mach-types.h> #include "../codecs/wm8940.h" #include "pxa2xx-i2s.h" static int imote2_asoc_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params) { struct snd_soc_pcm_runtime *rtd = substream->private_data; struct snd_soc_dai *codec_dai = rtd->codec_dai; struct snd_soc_dai *cpu_dai = rtd->cpu_dai; unsigned int clk = 0; int ret; switch (params_rate(params)) { case 8000: case 16000: case 48000: case 96000: clk = 12288000; break; case 11025: case 22050: case 44100: clk = 11289600; break; } /* set codec DAI configuration */ ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS); if (ret < 0) return ret; /* CPU should be clock master */ ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS); if (ret < 0) return ret; ret = snd_soc_dai_set_sysclk(codec_dai, 0, clk, SND_SOC_CLOCK_IN); if (ret < 0) return ret; /* set the I2S system clock as input (unused) */ ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, clk, SND_SOC_CLOCK_OUT); return ret; } static struct snd_soc_ops imote2_asoc_ops = { .hw_params = imote2_asoc_hw_params, }; static struct snd_soc_dai_link imote2_dai = { .name = "WM8940", .stream_name = "WM8940", .cpu_dai_name = "pxa2xx-i2s", .codec_dai_name = "wm8940-hifi", .platform_name = "pxa-pcm-audio", .codec_name = "wm8940-codec.0-0034", .ops = &imote2_asoc_ops, }; static struct snd_soc_card snd_soc_imote2 = { .name = "Imote2", .dai_link = &imote2_dai, .num_links = 1, }; static struct platform_device *imote2_snd_device; static int __init imote2_asoc_init(void) { int ret; if (!machine_is_intelmote2()) return -ENODEV; imote2_snd_device = platform_device_alloc("soc-audio", -1); if (!imote2_snd_device) return -ENOMEM; platform_set_drvdata(imote2_snd_device, &snd_soc_imote2); ret = platform_device_add(imote2_snd_device); if (ret) platform_device_put(imote2_snd_device); return ret; } module_init(imote2_asoc_init); static void __exit imote2_asoc_exit(void) { platform_device_unregister(imote2_snd_device); } module_exit(imote2_asoc_exit); MODULE_AUTHOR("Jonathan Cameron"); MODULE_DESCRIPTION("ALSA SoC Imote 2"); MODULE_LICENSE("GPL"); |