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(p: 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(p: params) * rfs;
63
64 ret = snd_soc_dai_set_sysclk(dai: codec_dai, WM8994_SYSCLK_FLL1,
65 freq: mclk_freq, SND_SOC_CLOCK_IN);
66 if (ret < 0)
67 return ret;
68
69 ret = snd_soc_dai_set_pll(dai: codec_dai, WM8994_FLL1, WM8994_FLL_SRC_MCLK1,
70 SMDK_WM8994_FREQ, freq_out: mclk_freq);
71 if (ret < 0)
72 return ret;
73
74 /* Set PCM source clock on CPU */
75 ret = snd_soc_dai_set_sysclk(dai: cpu_dai, S3C_PCM_CLKSRC_MUX,
76 freq: 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(dai: cpu_dai, S3C_PCM_SCLK_PER_FS, div: 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(dev: &pdev->dev, card: &smdk_pcm);
121 if (ret)
122 dev_err_probe(dev: &pdev->dev, err: ret, fmt: "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");
139

source code of linux/sound/soc/samsung/smdk_wm8994pcm.c