| Jonathan Cameron | a195b51 | 2009-05-04 14:54:11 +0000 | [diff] [blame] | 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 | |
| 11 | static 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 | |
| 60 | static struct snd_soc_ops imote2_asoc_ops = { |
| 61 | .hw_params = imote2_asoc_hw_params, |
| 62 | }; |
| 63 | |
| 64 | static 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 | |
| 72 | static 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 | |
| 79 | static struct snd_soc_device imote2_snd_devdata = { |
| 80 | .card = &snd_soc_imote2, |
| 81 | .codec_dev = &soc_codec_dev_wm8940, |
| 82 | }; |
| 83 | |
| 84 | static struct platform_device *imote2_snd_device; |
| 85 | |
| 86 | static 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 | } |
| 104 | module_init(imote2_asoc_init); |
| 105 | |
| 106 | static void __exit imote2_asoc_exit(void) |
| 107 | { |
| 108 | platform_device_unregister(imote2_snd_device); |
| 109 | } |
| 110 | module_exit(imote2_asoc_exit); |
| 111 | |
| 112 | MODULE_AUTHOR("Jonathan Cameron"); |
| 113 | MODULE_DESCRIPTION("ALSA SoC Imote 2"); |
| 114 | MODULE_LICENSE("GPL"); |