1 /* 2 * sound/soc/samsung/smdk_wm8994pcm.c 3 * 4 * Copyright (c) 2011 Samsung Electronics Co., Ltd 5 * http://www.samsung.com 6 * 7 * This program is free software; you can redistribute it and/or modify it 8 * under the terms of the GNU General Public License as published by the 9 * Free Software Foundation; either version 2 of the License, or (at your 10 * option) any later version. 11 */ 12 #include <linux/module.h> 13 #include <sound/soc.h> 14 #include <sound/pcm.h> 15 #include <sound/pcm_params.h> 16 17 #include "../codecs/wm8994.h" 18 #include "pcm.h" 19 20 /* 21 * Board Settings: 22 * o '1' means 'ON' 23 * o '0' means 'OFF' 24 * o 'X' means 'Don't care' 25 * 26 * SMDKC210, SMDKV310: CFG3- 1001, CFG5-1000, CFG7-111111 27 */ 28 29 /* 30 * Configure audio route as :- 31 * $ amixer sset 'DAC1' on,on 32 * $ amixer sset 'Right Headphone Mux' 'DAC' 33 * $ amixer sset 'Left Headphone Mux' 'DAC' 34 * $ amixer sset 'DAC1R Mixer AIF1.1' on 35 * $ amixer sset 'DAC1L Mixer AIF1.1' on 36 * $ amixer sset 'IN2L' on 37 * $ amixer sset 'IN2L PGA IN2LN' on 38 * $ amixer sset 'MIXINL IN2L' on 39 * $ amixer sset 'AIF1ADC1L Mixer ADC/DMIC' on 40 * $ amixer sset 'IN2R' on 41 * $ amixer sset 'IN2R PGA IN2RN' on 42 * $ amixer sset 'MIXINR IN2R' on 43 * $ amixer sset 'AIF1ADC1R Mixer ADC/DMIC' on 44 */ 45 46 /* SMDK has a 16.9344MHZ crystal attached to WM8994 */ 47 #define SMDK_WM8994_FREQ 16934400 48 49 static int smdk_wm8994_pcm_hw_params(struct snd_pcm_substream *substream, 50 struct snd_pcm_hw_params *params) 51 { 52 struct snd_soc_pcm_runtime *rtd = substream->private_data; 53 struct snd_soc_dai *codec_dai = rtd->codec_dai; 54 struct snd_soc_dai *cpu_dai = rtd->cpu_dai; 55 unsigned long mclk_freq; 56 int rfs, ret; 57 58 switch(params_rate(params)) { 59 case 8000: 60 rfs = 512; 61 break; 62 default: 63 dev_err(cpu_dai->dev, "%s:%d Sampling Rate %u not supported!\n", 64 __func__, __LINE__, params_rate(params)); 65 return -EINVAL; 66 } 67 68 mclk_freq = params_rate(params) * rfs; 69 70 ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_FLL1, 71 mclk_freq, SND_SOC_CLOCK_IN); 72 if (ret < 0) 73 return ret; 74 75 ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK1, 76 SMDK_WM8994_FREQ, mclk_freq); 77 if (ret < 0) 78 return ret; 79 80 /* Set PCM source clock on CPU */ 81 ret = snd_soc_dai_set_sysclk(cpu_dai, S3C_PCM_CLKSRC_MUX, 82 mclk_freq, SND_SOC_CLOCK_IN); 83 if (ret < 0) 84 return ret; 85 86 /* Set SCLK_DIV for making bclk */ 87 ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_PCM_SCLK_PER_FS, rfs); 88 if (ret < 0) 89 return ret; 90 91 return 0; 92 } 93 94 static struct snd_soc_ops smdk_wm8994_pcm_ops = { 95 .hw_params = smdk_wm8994_pcm_hw_params, 96 }; 97 98 static struct snd_soc_dai_link smdk_dai[] = { 99 { 100 .name = "WM8994 PAIF PCM", 101 .stream_name = "Primary PCM", 102 .cpu_dai_name = "samsung-pcm.0", 103 .codec_dai_name = "wm8994-aif1", 104 .platform_name = "samsung-pcm.0", 105 .codec_name = "wm8994-codec", 106 .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF | 107 SND_SOC_DAIFMT_CBS_CFS, 108 .ops = &smdk_wm8994_pcm_ops, 109 }, 110 }; 111 112 static struct snd_soc_card smdk_pcm = { 113 .name = "SMDK-PCM", 114 .owner = THIS_MODULE, 115 .dai_link = smdk_dai, 116 .num_links = 1, 117 }; 118 119 static int snd_smdk_probe(struct platform_device *pdev) 120 { 121 int ret = 0; 122 123 smdk_pcm.dev = &pdev->dev; 124 ret = devm_snd_soc_register_card(&pdev->dev, &smdk_pcm); 125 if (ret) 126 dev_err(&pdev->dev, "snd_soc_register_card failed %d\n", ret); 127 128 return ret; 129 } 130 131 static struct platform_driver snd_smdk_driver = { 132 .driver = { 133 .name = "samsung-smdk-pcm", 134 }, 135 .probe = snd_smdk_probe, 136 }; 137 138 module_platform_driver(snd_smdk_driver); 139 140 MODULE_AUTHOR("Sangbeom Kim, <sbkim73@samsung.com>"); 141 MODULE_DESCRIPTION("ALSA SoC SMDK WM8994 for PCM"); 142 MODULE_LICENSE("GPL"); 143