soc/samsung/smdk_wm8994pcm.c

0001 // SPDX-License-Identifier: GPL-2.0+
0002 //
0003 // Copyright (c) 2011 Samsung Electronics Co., Ltd
0004 //      http://www.samsung.com
0005
0006 #include <linux/module.h>
0007 #include <sound/soc.h>
0008 #include <sound/pcm.h>
0009 #include <sound/pcm_params.h>
0010
0011 #include "../codecs/wm8994.h"
0012 #include "pcm.h"
0013
0014 /*
0015  * Board Settings:
0016  *  o '1' means 'ON'
0017  *  o '0' means 'OFF'
0018  *  o 'X' means 'Don't care'
0019  *
0020  * SMDKC210, SMDKV310: CFG3- 1001, CFG5-1000, CFG7-111111
0021  */
0022
0023 /*
0024  * Configure audio route as :-
0025  * $ amixer sset 'DAC1' on,on
0026  * $ amixer sset 'Right Headphone Mux' 'DAC'
0027  * $ amixer sset 'Left Headphone Mux' 'DAC'
0028  * $ amixer sset 'DAC1R Mixer AIF1.1' on
0029  * $ amixer sset 'DAC1L Mixer AIF1.1' on
0030  * $ amixer sset 'IN2L' on
0031  * $ amixer sset 'IN2L PGA IN2LN' on
0032  * $ amixer sset 'MIXINL IN2L' on
0033  * $ amixer sset 'AIF1ADC1L Mixer ADC/DMIC' on
0034  * $ amixer sset 'IN2R' on
0035  * $ amixer sset 'IN2R PGA IN2RN' on
0036  * $ amixer sset 'MIXINR IN2R' on
0037  * $ amixer sset 'AIF1ADC1R Mixer ADC/DMIC' on
0038  */
0039
0040 /* SMDK has a 16.9344MHZ crystal attached to WM8994 */
0041 #define SMDK_WM8994_FREQ 16934400
0042
0043 static int smdk_wm8994_pcm_hw_params(struct snd_pcm_substream *substream,
0044                   struct snd_pcm_hw_params *params)
0045 {
0046     struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
0047     struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
0048     struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
0049     unsigned long mclk_freq;
0050     int rfs, ret;
0051
0052     switch(params_rate(params)) {
0053     case 8000:
0054         rfs = 512;
0055         break;
0056     default:
0057         dev_err(cpu_dai->dev, "%s:%d Sampling Rate %u not supported!\n",
0058         __func__, __LINE__, params_rate(params));
0059         return -EINVAL;
0060     }
0061
0062     mclk_freq = params_rate(params) * rfs;
0063
0064     ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_FLL1,
0065                     mclk_freq, SND_SOC_CLOCK_IN);
0066     if (ret < 0)
0067         return ret;
0068
0069     ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK1,
0070                     SMDK_WM8994_FREQ, mclk_freq);
0071     if (ret < 0)
0072         return ret;
0073
0074     /* Set PCM source clock on CPU */
0075     ret = snd_soc_dai_set_sysclk(cpu_dai, S3C_PCM_CLKSRC_MUX,
0076                     mclk_freq, SND_SOC_CLOCK_IN);
0077     if (ret < 0)
0078         return ret;
0079
0080     /* Set SCLK_DIV for making bclk */
0081     ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_PCM_SCLK_PER_FS, rfs);
0082     if (ret < 0)
0083         return ret;
0084
0085     return 0;
0086 }
0087
0088 static const struct snd_soc_ops smdk_wm8994_pcm_ops = {
0089     .hw_params = smdk_wm8994_pcm_hw_params,
0090 };
0091
0092 SND_SOC_DAILINK_DEFS(paif_pcm,
0093     DAILINK_COMP_ARRAY(COMP_CPU("samsung-pcm.0")),
0094     DAILINK_COMP_ARRAY(COMP_CODEC("wm8994-codec", "wm8994-aif1")),
0095     DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-pcm.0")));
0096
0097 static struct snd_soc_dai_link smdk_dai[] = {
0098     {
0099         .name = "WM8994 PAIF PCM",
0100         .stream_name = "Primary PCM",
0101         .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF |
0102                SND_SOC_DAIFMT_CBS_CFS,
0103         .ops = &smdk_wm8994_pcm_ops,
0104         SND_SOC_DAILINK_REG(paif_pcm),
0105     },
0106 };
0107
0108 static struct snd_soc_card smdk_pcm = {
0109     .name = "SMDK-PCM",
0110     .owner = THIS_MODULE,
0111     .dai_link = smdk_dai,
0112     .num_links = 1,
0113 };
0114
0115 static int snd_smdk_probe(struct platform_device *pdev)
0116 {
0117     int ret = 0;
0118
0119     smdk_pcm.dev = &pdev->dev;
0120     ret = devm_snd_soc_register_card(&pdev->dev, &smdk_pcm);
0121     if (ret)
0122         dev_err_probe(&pdev->dev, ret, "snd_soc_register_card failed\n");
0123
0124     return ret;
0125 }
0126
0127 static struct platform_driver snd_smdk_driver = {
0128     .driver = {
0129         .name = "samsung-smdk-pcm",
0130     },
0131     .probe = snd_smdk_probe,
0132 };
0133
0134 module_platform_driver(snd_smdk_driver);
0135
0136 MODULE_AUTHOR("Sangbeom Kim, <sbkim73@samsung.com>");
0137 MODULE_DESCRIPTION("ALSA SoC SMDK WM8994 for PCM");
0138 MODULE_LICENSE("GPL");