LXR linux/sound/soc/samsung/smdk

   1// SPDX-License-Identifier: GPL-2.0+
   2//
   3// Copyright (c) 2011 Samsung Electronics Co., Ltd
   4//              http://www.samsung.com
   5
   6#include <linux/module.h>
   7#include <sound/soc.h>
   8#include <sound/pcm.h>
   9#include <sound/pcm_params.h>
  10
  11#include "../codecs/wm8994.h"
  12#include "pcm.h"
  13
  14/*
  15 * Board Settings:
  16 *  o '1' means 'ON'
  17 *  o '0' means 'OFF'
  18 *  o 'X' means 'Don't care'
  19 *
  20 * SMDKC210, SMDKV310: CFG3- 1001, CFG5-1000, CFG7-111111
  21 */
  22
  23/*
  24 * Configure audio route as :-
  25 * $ amixer sset 'DAC1' on,on
  26 * $ amixer sset 'Right Headphone Mux' 'DAC'
  27 * $ amixer sset 'Left Headphone Mux' 'DAC'
  28 * $ amixer sset 'DAC1R Mixer AIF1.1' on
  29 * $ amixer sset 'DAC1L Mixer AIF1.1' on
  30 * $ amixer sset 'IN2L' on
  31 * $ amixer sset 'IN2L PGA IN2LN' on
  32 * $ amixer sset 'MIXINL IN2L' on
  33 * $ amixer sset 'AIF1ADC1L Mixer ADC/DMIC' on
  34 * $ amixer sset 'IN2R' on
  35 * $ amixer sset 'IN2R PGA IN2RN' on
  36 * $ amixer sset 'MIXINR IN2R' on
  37 * $ amixer sset 'AIF1ADC1R Mixer ADC/DMIC' on
  38 */
  39
  40/* SMDK has a 16.9344MHZ crystal attached to WM8994 */
  41#define SMDK_WM8994_FREQ 16934400
  42
  43static int smdk_wm8994_pcm_hw_params(struct snd_pcm_substream *substream,
  44                              struct snd_pcm_hw_params *params)
  45{
  46        struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
  47        struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
  48        struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
  49        unsigned long mclk_freq;
  50        int rfs, ret;
  51
  52        switch(params_rate(params)) {
  53        case 8000:
  54                rfs = 512;
  55                break;
  56        default:
  57                dev_err(cpu_dai->dev, "%s:%d Sampling Rate %u not supported!\n",
  58                __func__, __LINE__, params_rate(params));
  59                return -EINVAL;
  60        }
  61
  62        mclk_freq = params_rate(params) * rfs;
  63
  64        ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_FLL1,
  65                                        mclk_freq, SND_SOC_CLOCK_IN);
  66        if (ret < 0)
  67                return ret;
  68
  69        ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK1,
  70                                        SMDK_WM8994_FREQ, mclk_freq);
  71        if (ret < 0)
  72                return ret;
  73
  74        /* Set PCM source clock on CPU */
  75        ret = snd_soc_dai_set_sysclk(cpu_dai, S3C_PCM_CLKSRC_MUX,
  76                                        mclk_freq, SND_SOC_CLOCK_IN);
  77        if (ret < 0)
  78                return ret;
  79
  80        /* Set SCLK_DIV for making bclk */
  81        ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_PCM_SCLK_PER_FS, rfs);
  82        if (ret < 0)
  83                return ret;
  84
  85        return 0;
  86}
  87
  88static struct snd_soc_ops smdk_wm8994_pcm_ops = {
  89        .hw_params = smdk_wm8994_pcm_hw_params,
  90};
  91
  92SND_SOC_DAILINK_DEFS(paif_pcm,
  93        DAILINK_COMP_ARRAY(COMP_CPU("samsung-pcm.0")),
  94        DAILINK_COMP_ARRAY(COMP_CODEC("wm8994-codec", "wm8994-aif1")),
  95        DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-pcm.0")));
  96
  97static struct snd_soc_dai_link smdk_dai[] = {
  98        {
  99                .name = "WM8994 PAIF PCM",
 100                .stream_name = "Primary PCM",
 101                .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF |
 102                           SND_SOC_DAIFMT_CBS_CFS,
 103                .ops = &smdk_wm8994_pcm_ops,
 104                SND_SOC_DAILINK_REG(paif_pcm),
 105        },
 106};
 107
 108static struct snd_soc_card smdk_pcm = {
 109        .name = "SMDK-PCM",
 110        .owner = THIS_MODULE,
 111        .dai_link = smdk_dai,
 112        .num_links = 1,
 113};
 114
 115static int snd_smdk_probe(struct platform_device *pdev)
 116{
 117        int ret = 0;
 118
 119        smdk_pcm.dev = &pdev->dev;
 120        ret = devm_snd_soc_register_card(&pdev->dev, &smdk_pcm);
 121        if (ret && ret != -EPROBE_DEFER)
 122                dev_err(&pdev->dev, "snd_soc_register_card failed %d\n", ret);
 123
 124        return ret;
 125}
 126
 127static struct platform_driver snd_smdk_driver = {
 128        .driver = {
 129                .name = "samsung-smdk-pcm",
 130        },
 131        .probe = snd_smdk_probe,
 132};
 133
 134module_platform_driver(snd_smdk_driver);
 135
 136MODULE_AUTHOR("Sangbeom Kim, <sbkim73@samsung.com>");
 137MODULE_DESCRIPTION("ALSA SoC SMDK WM8994 for PCM");
 138MODULE_LICENSE("GPL");
 139