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1// SPDX-License-Identifier: GPL-2.0+2//3// Copyright (c) 2011 Samsung Electronics Co., Ltd4// http://www.samsung.com5 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, CFG7-11111121 */22 23/*24 * Configure audio route as :-25 * $ amixer sset 'DAC1' on,on26 * $ amixer sset 'Right Headphone Mux' 'DAC'27 * $ amixer sset 'Left Headphone Mux' 'DAC'28 * $ amixer sset 'DAC1R Mixer AIF1.1' on29 * $ amixer sset 'DAC1L Mixer AIF1.1' on30 * $ amixer sset 'IN2L' on31 * $ amixer sset 'IN2L PGA IN2LN' on32 * $ amixer sset 'MIXINL IN2L' on33 * $ amixer sset 'AIF1ADC1L Mixer ADC/DMIC' on34 * $ amixer sset 'IN2R' on35 * $ amixer sset 'IN2R PGA IN2RN' on36 * $ amixer sset 'MIXINR IN2R' on37 * $ amixer sset 'AIF1ADC1R Mixer ADC/DMIC' on38 */39 40/* SMDK has a 16.9344MHZ crystal attached to WM8994 */41#define SMDK_WM8994_FREQ 1693440042 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 = snd_soc_substream_to_rtd(substream);47 struct snd_soc_dai *codec_dai = snd_soc_rtd_to_codec(rtd, 0);48 struct snd_soc_dai *cpu_dai = snd_soc_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 const 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)122 dev_err_probe(&pdev->dev, ret, "snd_soc_register_card failed\n");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