143 lines
3.5 KiB
C
143 lines
3.5 KiB
C
/*
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* sound/soc/samsung/smdk_wm8994pcm.c
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*
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* Copyright (c) 2011 Samsung Electronics Co., Ltd
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* http://www.samsung.com
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License as published by the
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* Free Software Foundation; either version 2 of the License, or (at your
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* option) any later version.
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*/
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#include <linux/module.h>
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#include <sound/soc.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include "../codecs/wm8994.h"
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#include "pcm.h"
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/*
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* Board Settings:
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* o '1' means 'ON'
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* o '0' means 'OFF'
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* o 'X' means 'Don't care'
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*
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* SMDKC210, SMDKV310: CFG3- 1001, CFG5-1000, CFG7-111111
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*/
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/*
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* Configure audio route as :-
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* $ amixer sset 'DAC1' on,on
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* $ amixer sset 'Right Headphone Mux' 'DAC'
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* $ amixer sset 'Left Headphone Mux' 'DAC'
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* $ amixer sset 'DAC1R Mixer AIF1.1' on
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* $ amixer sset 'DAC1L Mixer AIF1.1' on
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* $ amixer sset 'IN2L' on
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* $ amixer sset 'IN2L PGA IN2LN' on
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* $ amixer sset 'MIXINL IN2L' on
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* $ amixer sset 'AIF1ADC1L Mixer ADC/DMIC' on
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* $ amixer sset 'IN2R' on
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* $ amixer sset 'IN2R PGA IN2RN' on
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* $ amixer sset 'MIXINR IN2R' on
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* $ amixer sset 'AIF1ADC1R Mixer ADC/DMIC' on
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*/
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/* SMDK has a 16.9344MHZ crystal attached to WM8994 */
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#define SMDK_WM8994_FREQ 16934400
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static int smdk_wm8994_pcm_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *codec_dai = rtd->codec_dai;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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unsigned long mclk_freq;
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int rfs, ret;
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switch(params_rate(params)) {
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case 8000:
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rfs = 512;
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break;
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default:
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dev_err(cpu_dai->dev, "%s:%d Sampling Rate %u not supported!\n",
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__func__, __LINE__, params_rate(params));
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return -EINVAL;
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}
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mclk_freq = params_rate(params) * rfs;
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ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_FLL1,
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mclk_freq, SND_SOC_CLOCK_IN);
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if (ret < 0)
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return ret;
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ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK1,
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SMDK_WM8994_FREQ, mclk_freq);
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if (ret < 0)
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return ret;
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/* Set PCM source clock on CPU */
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ret = snd_soc_dai_set_sysclk(cpu_dai, S3C_PCM_CLKSRC_MUX,
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mclk_freq, SND_SOC_CLOCK_IN);
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if (ret < 0)
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return ret;
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/* Set SCLK_DIV for making bclk */
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ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_PCM_SCLK_PER_FS, rfs);
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if (ret < 0)
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return ret;
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return 0;
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}
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static struct snd_soc_ops smdk_wm8994_pcm_ops = {
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.hw_params = smdk_wm8994_pcm_hw_params,
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};
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static struct snd_soc_dai_link smdk_dai[] = {
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{
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.name = "WM8994 PAIF PCM",
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.stream_name = "Primary PCM",
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.cpu_dai_name = "samsung-pcm.0",
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.codec_dai_name = "wm8994-aif1",
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.platform_name = "samsung-pcm.0",
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.codec_name = "wm8994-codec",
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.dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF |
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SND_SOC_DAIFMT_CBS_CFS,
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.ops = &smdk_wm8994_pcm_ops,
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},
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};
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static struct snd_soc_card smdk_pcm = {
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.name = "SMDK-PCM",
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.owner = THIS_MODULE,
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.dai_link = smdk_dai,
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.num_links = 1,
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};
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static int snd_smdk_probe(struct platform_device *pdev)
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{
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int ret = 0;
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smdk_pcm.dev = &pdev->dev;
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ret = devm_snd_soc_register_card(&pdev->dev, &smdk_pcm);
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if (ret)
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dev_err(&pdev->dev, "snd_soc_register_card failed %d\n", ret);
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return ret;
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}
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static struct platform_driver snd_smdk_driver = {
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.driver = {
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.name = "samsung-smdk-pcm",
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},
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.probe = snd_smdk_probe,
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};
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module_platform_driver(snd_smdk_driver);
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MODULE_AUTHOR("Sangbeom Kim, <sbkim73@samsung.com>");
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MODULE_DESCRIPTION("ALSA SoC SMDK WM8994 for PCM");
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MODULE_LICENSE("GPL");
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