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 43 static 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 88 static const struct snd_soc_ops smdk_wm8994_pcm_ops = { 89 .hw_params = smdk_wm8994_pcm_hw_params, 90 }; 91 92 SND_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 97 static 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 }; 107 108 static struct snd_soc_card smdk_pcm = { 109 .name = "SMDK-PCM", 110 .owner = THIS_MODULE, 111 .dai_link = smdk_dai, 112 .num_links = 1, 113 }; 114 115 static 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 } 126 127 static struct platform_driver snd_smdk_driver = { 128 .driver = { 129 .name = "samsung-smdk-pcm", 130 }, 131 .probe = snd_smdk_probe, 132 }; 133 134 module_platform_driver(snd_smdk_driver); 135 136 MODULE_AUTHOR("Sangbeom Kim, <sbkim73@samsung.com>"); 137 MODULE_DESCRIPTION("ALSA SoC SMDK WM8994 for PCM"); 138 MODULE_LICENSE("GPL"); 139