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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 | #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; } 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", .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS, .ops = &imote2_asoc_ops, }; static struct snd_soc_card imote2 = { .name = "Imote2", .owner = THIS_MODULE, .dai_link = &imote2_dai, .num_links = 1, }; static int imote2_probe(struct platform_device *pdev) { struct snd_soc_card *card = &imote2; int ret; card->dev = &pdev->dev; ret = snd_soc_register_card(card); if (ret) dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", ret); return ret; } static int imote2_remove(struct platform_device *pdev) { struct snd_soc_card *card = platform_get_drvdata(pdev); snd_soc_unregister_card(card); return 0; } static struct platform_driver imote2_driver = { .driver = { .name = "imote2-audio", .owner = THIS_MODULE, .pm = &snd_soc_pm_ops, }, .probe = imote2_probe, .remove = imote2_remove, }; module_platform_driver(imote2_driver); MODULE_AUTHOR("Jonathan Cameron"); MODULE_DESCRIPTION("ALSA SoC Imote 2"); MODULE_LICENSE("GPL"); MODULE_ALIAS("platform:imote2-audio"); |