smdk_wm8994pcm.c

  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
 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_CBC_CFC,
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");