cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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smdk_wm8994pcm.c (3460B)


      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 = 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
     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_CBS_CFS,
    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");