| // SPDX-License-Identifier: GPL-2.0+ |
| // |
| // Copyright (c) 2011 Samsung Electronics Co., Ltd |
| // http://www.samsung.com |
| |
| #include <linux/module.h> |
| #include <sound/soc.h> |
| #include <sound/pcm.h> |
| #include <sound/pcm_params.h> |
| |
| #include "../codecs/wm8994.h" |
| #include "pcm.h" |
| |
| /* |
| * Board Settings: |
| * o '1' means 'ON' |
| * o '0' means 'OFF' |
| * o 'X' means 'Don't care' |
| * |
| * SMDKC210, SMDKV310: CFG3- 1001, CFG5-1000, CFG7-111111 |
| */ |
| |
| /* |
| * Configure audio route as :- |
| * $ amixer sset 'DAC1' on,on |
| * $ amixer sset 'Right Headphone Mux' 'DAC' |
| * $ amixer sset 'Left Headphone Mux' 'DAC' |
| * $ amixer sset 'DAC1R Mixer AIF1.1' on |
| * $ amixer sset 'DAC1L Mixer AIF1.1' on |
| * $ amixer sset 'IN2L' on |
| * $ amixer sset 'IN2L PGA IN2LN' on |
| * $ amixer sset 'MIXINL IN2L' on |
| * $ amixer sset 'AIF1ADC1L Mixer ADC/DMIC' on |
| * $ amixer sset 'IN2R' on |
| * $ amixer sset 'IN2R PGA IN2RN' on |
| * $ amixer sset 'MIXINR IN2R' on |
| * $ amixer sset 'AIF1ADC1R Mixer ADC/DMIC' on |
| */ |
| |
| /* SMDK has a 16.9344MHZ crystal attached to WM8994 */ |
| #define SMDK_WM8994_FREQ 16934400 |
| |
| static int smdk_wm8994_pcm_hw_params(struct snd_pcm_substream *substream, |
| struct snd_pcm_hw_params *params) |
| { |
| struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream); |
| struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0); |
| struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0); |
| unsigned long mclk_freq; |
| int rfs, ret; |
| |
| switch(params_rate(params)) { |
| case 8000: |
| rfs = 512; |
| break; |
| default: |
| dev_err(cpu_dai->dev, "%s:%d Sampling Rate %u not supported!\n", |
| __func__, __LINE__, params_rate(params)); |
| return -EINVAL; |
| } |
| |
| mclk_freq = params_rate(params) * rfs; |
| |
| ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_FLL1, |
| mclk_freq, SND_SOC_CLOCK_IN); |
| if (ret < 0) |
| return ret; |
| |
| ret = snd_soc_dai_set_pll(codec_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK1, |
| SMDK_WM8994_FREQ, mclk_freq); |
| if (ret < 0) |
| return ret; |
| |
| /* Set PCM source clock on CPU */ |
| ret = snd_soc_dai_set_sysclk(cpu_dai, S3C_PCM_CLKSRC_MUX, |
| mclk_freq, SND_SOC_CLOCK_IN); |
| if (ret < 0) |
| return ret; |
| |
| /* Set SCLK_DIV for making bclk */ |
| ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_PCM_SCLK_PER_FS, rfs); |
| if (ret < 0) |
| return ret; |
| |
| return 0; |
| } |
| |
| static struct snd_soc_ops smdk_wm8994_pcm_ops = { |
| .hw_params = smdk_wm8994_pcm_hw_params, |
| }; |
| |
| SND_SOC_DAILINK_DEFS(paif_pcm, |
| DAILINK_COMP_ARRAY(COMP_CPU("samsung-pcm.0")), |
| DAILINK_COMP_ARRAY(COMP_CODEC("wm8994-codec", "wm8994-aif1")), |
| DAILINK_COMP_ARRAY(COMP_PLATFORM("samsung-pcm.0"))); |
| |
| static struct snd_soc_dai_link smdk_dai[] = { |
| { |
| .name = "WM8994 PAIF PCM", |
| .stream_name = "Primary PCM", |
| .dai_fmt = SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF | |
| SND_SOC_DAIFMT_CBS_CFS, |
| .ops = &smdk_wm8994_pcm_ops, |
| SND_SOC_DAILINK_REG(paif_pcm), |
| }, |
| }; |
| |
| static struct snd_soc_card smdk_pcm = { |
| .name = "SMDK-PCM", |
| .owner = THIS_MODULE, |
| .dai_link = smdk_dai, |
| .num_links = 1, |
| }; |
| |
| static int snd_smdk_probe(struct platform_device *pdev) |
| { |
| int ret = 0; |
| |
| smdk_pcm.dev = &pdev->dev; |
| ret = devm_snd_soc_register_card(&pdev->dev, &smdk_pcm); |
| if (ret && ret != -EPROBE_DEFER) |
| dev_err(&pdev->dev, "snd_soc_register_card failed %d\n", ret); |
| |
| return ret; |
| } |
| |
| static struct platform_driver snd_smdk_driver = { |
| .driver = { |
| .name = "samsung-smdk-pcm", |
| }, |
| .probe = snd_smdk_probe, |
| }; |
| |
| module_platform_driver(snd_smdk_driver); |
| |
| MODULE_AUTHOR("Sangbeom Kim, <sbkim73@samsung.com>"); |
| MODULE_DESCRIPTION("ALSA SoC SMDK WM8994 for PCM"); |
| MODULE_LICENSE("GPL"); |