2 * sound/soc/samsung/smdk_wm8580pcm.c
4 * Copyright (c) 2011 Samsung Electronics Co. Ltd
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms of the GNU General Public License as published by the
8 * Free Software Foundation; either version 2 of the License, or (at your
9 * option) any later version.
11 #include <linux/module.h>
12 #include <sound/soc.h>
13 #include <sound/pcm_params.h>
14 #include <sound/pcm.h>
16 #include <asm/mach-types.h>
18 #include "../codecs/wm8580.h"
25 * o 'X' means 'Don't care'
27 * SMDK6410 Base B/D: CFG1-0000, CFG2-1111
28 * SMDKC110, SMDKV210: CFGB11-100100, CFGB12-0000
31 #define SMDK_WM8580_EXT_OSC 12000000
32 #define SMDK_WM8580_EXT_MCLK 4096000
33 #define SMDK_WM8580_EXT_VOICE 2048000
35 static unsigned long mclk_freq
;
36 static unsigned long xtal_freq
;
39 * If MCLK clock directly gets from XTAL, we don't have to use PLL
40 * to make MCLK, but if XTAL clock source connects with other codec
41 * pin (like XTI), we should have to set codec's PLL to make MCLK.
42 * Because Samsung SoC does not support pcmcdclk output like I2S.
45 static int smdk_wm8580_pcm_hw_params(struct snd_pcm_substream
*substream
,
46 struct snd_pcm_hw_params
*params
)
48 struct snd_soc_pcm_runtime
*rtd
= substream
->private_data
;
49 struct snd_soc_dai
*codec_dai
= rtd
->codec_dai
;
50 struct snd_soc_dai
*cpu_dai
= rtd
->cpu_dai
;
53 switch (params_rate(params
)) {
57 printk(KERN_ERR
"%s:%d Sampling Rate %u not supported!\n",
58 __func__
, __LINE__
, params_rate(params
));
62 rfs
= mclk_freq
/ params_rate(params
) / 2;
64 if (mclk_freq
== xtal_freq
) {
65 ret
= snd_soc_dai_set_sysclk(codec_dai
, WM8580_CLKSRC_MCLK
,
66 mclk_freq
, SND_SOC_CLOCK_IN
);
70 ret
= snd_soc_dai_set_clkdiv(codec_dai
, WM8580_MCLK
,
75 ret
= snd_soc_dai_set_sysclk(codec_dai
, WM8580_CLKSRC_PLLA
,
76 mclk_freq
, SND_SOC_CLOCK_IN
);
80 ret
= snd_soc_dai_set_clkdiv(codec_dai
, WM8580_MCLK
,
85 ret
= snd_soc_dai_set_pll(codec_dai
, WM8580_PLLA
, 0,
86 xtal_freq
, mclk_freq
);
91 /* Set PCM source clock on CPU */
92 ret
= snd_soc_dai_set_sysclk(cpu_dai
, S3C_PCM_CLKSRC_MUX
,
93 mclk_freq
, SND_SOC_CLOCK_IN
);
97 /* Set SCLK_DIV for making bclk */
98 ret
= snd_soc_dai_set_clkdiv(cpu_dai
, S3C_PCM_SCLK_PER_FS
, rfs
);
105 static struct snd_soc_ops smdk_wm8580_pcm_ops
= {
106 .hw_params
= smdk_wm8580_pcm_hw_params
,
109 #define SMDK_DAI_FMT (SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF | \
110 SND_SOC_DAIFMT_CBS_CFS)
112 static struct snd_soc_dai_link smdk_dai
[] = {
114 .name
= "WM8580 PAIF PCM RX",
115 .stream_name
= "Playback",
116 .cpu_dai_name
= "samsung-pcm.0",
117 .codec_dai_name
= "wm8580-hifi-playback",
118 .platform_name
= "samsung-audio",
119 .codec_name
= "wm8580.0-001b",
120 .dai_fmt
= SMDK_DAI_FMT
,
121 .ops
= &smdk_wm8580_pcm_ops
,
123 .name
= "WM8580 PAIF PCM TX",
124 .stream_name
= "Capture",
125 .cpu_dai_name
= "samsung-pcm.0",
126 .codec_dai_name
= "wm8580-hifi-capture",
127 .platform_name
= "samsung-pcm.0",
128 .codec_name
= "wm8580.0-001b",
129 .dai_fmt
= SMDK_DAI_FMT
,
130 .ops
= &smdk_wm8580_pcm_ops
,
134 static struct snd_soc_card smdk_pcm
= {
136 .owner
= THIS_MODULE
,
137 .dai_link
= smdk_dai
,
142 * After SMDKC110 Base Board's Rev is '0.1', 12MHz External OSC(X1)
143 * is absent (or not connected), so we connect EXT_VOICE_CLK(OSC4),
144 * 2.0484Mhz, directly with MCLK both Codec and SoC.
146 static int snd_smdk_probe(struct platform_device
*pdev
)
150 xtal_freq
= SMDK_WM8580_EXT_OSC
;
151 mclk_freq
= SMDK_WM8580_EXT_MCLK
;
153 if (machine_is_smdkc110() || machine_is_smdkv210())
154 xtal_freq
= mclk_freq
= SMDK_WM8580_EXT_VOICE
;
156 smdk_pcm
.dev
= &pdev
->dev
;
157 ret
= devm_snd_soc_register_card(&pdev
->dev
, &smdk_pcm
);
159 dev_err(&pdev
->dev
, "snd_soc_register_card failed %d\n", ret
);
164 static struct platform_driver snd_smdk_driver
= {
166 .name
= "samsung-smdk-pcm",
168 .probe
= snd_smdk_probe
,
171 module_platform_driver(snd_smdk_driver
);
173 MODULE_AUTHOR("Sangbeom Kim, <sbkim73@samsung.com>");
174 MODULE_DESCRIPTION("ALSA SoC SMDK WM8580 for PCM");
175 MODULE_LICENSE("GPL");