1 /*
2 * sound/soc/samsung/smdk_wm8580pcm.c
3 *
4 * Copyright (c) 2011 Samsung Electronics Co. Ltd
5 *
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.
10 */
11 #include <linux/module.h>
12 #include <sound/soc.h>
13 #include <sound/pcm_params.h>
14 #include <sound/pcm.h>
15
16 #include <asm/mach-types.h>
17
18 #include "../codecs/wm8580.h"
19 #include "dma.h"
20 #include "pcm.h"
21
22 /*
23 * Board Settings:
24 * o '1' means 'ON'
25 * o '0' means 'OFF'
26 * o 'X' means 'Don't care'
27 *
28 * SMDK6410 Base B/D: CFG1-0000, CFG2-1111
29 * SMDKC110, SMDKV210: CFGB11-100100, CFGB12-0000
30 */
31
32 #define SMDK_WM8580_EXT_OSC 12000000
33 #define SMDK_WM8580_EXT_MCLK 4096000
34 #define SMDK_WM8580_EXT_VOICE 2048000
35
36 static unsigned long mclk_freq;
37 static unsigned long xtal_freq;
38
39 /*
40 * If MCLK clock directly gets from XTAL, we don't have to use PLL
41 * to make MCLK, but if XTAL clock source connects with other codec
42 * pin (like XTI), we should have to set codec's PLL to make MCLK.
43 * Because Samsung SoC does not support pcmcdclk output like I2S.
44 */
45
smdk_wm8580_pcm_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)46 static int smdk_wm8580_pcm_hw_params(struct snd_pcm_substream *substream,
47 struct snd_pcm_hw_params *params)
48 {
49 struct snd_soc_pcm_runtime *rtd = substream->private_data;
50 struct snd_soc_dai *codec_dai = rtd->codec_dai;
51 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
52 int rfs, ret;
53
54 switch (params_rate(params)) {
55 case 8000:
56 break;
57 default:
58 printk(KERN_ERR "%s:%d Sampling Rate %u not supported!\n",
59 __func__, __LINE__, params_rate(params));
60 return -EINVAL;
61 }
62
63 rfs = mclk_freq / params_rate(params) / 2;
64
65 if (mclk_freq == xtal_freq) {
66 ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_MCLK,
67 mclk_freq, SND_SOC_CLOCK_IN);
68 if (ret < 0)
69 return ret;
70
71 ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
72 WM8580_CLKSRC_MCLK);
73 if (ret < 0)
74 return ret;
75 } else {
76 ret = snd_soc_dai_set_sysclk(codec_dai, WM8580_CLKSRC_PLLA,
77 mclk_freq, SND_SOC_CLOCK_IN);
78 if (ret < 0)
79 return ret;
80
81 ret = snd_soc_dai_set_clkdiv(codec_dai, WM8580_MCLK,
82 WM8580_CLKSRC_PLLA);
83 if (ret < 0)
84 return ret;
85
86 ret = snd_soc_dai_set_pll(codec_dai, WM8580_PLLA, 0,
87 xtal_freq, mclk_freq);
88 if (ret < 0)
89 return ret;
90 }
91
92 /* Set PCM source clock on CPU */
93 ret = snd_soc_dai_set_sysclk(cpu_dai, S3C_PCM_CLKSRC_MUX,
94 mclk_freq, SND_SOC_CLOCK_IN);
95 if (ret < 0)
96 return ret;
97
98 /* Set SCLK_DIV for making bclk */
99 ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_PCM_SCLK_PER_FS, rfs);
100 if (ret < 0)
101 return ret;
102
103 return 0;
104 }
105
106 static struct snd_soc_ops smdk_wm8580_pcm_ops = {
107 .hw_params = smdk_wm8580_pcm_hw_params,
108 };
109
110 #define SMDK_DAI_FMT (SND_SOC_DAIFMT_DSP_B | SND_SOC_DAIFMT_IB_NF | \
111 SND_SOC_DAIFMT_CBS_CFS)
112
113 static struct snd_soc_dai_link smdk_dai[] = {
114 {
115 .name = "WM8580 PAIF PCM RX",
116 .stream_name = "Playback",
117 .cpu_dai_name = "samsung-pcm.0",
118 .codec_dai_name = "wm8580-hifi-playback",
119 .platform_name = "samsung-audio",
120 .codec_name = "wm8580.0-001b",
121 .dai_fmt = SMDK_DAI_FMT,
122 .ops = &smdk_wm8580_pcm_ops,
123 }, {
124 .name = "WM8580 PAIF PCM TX",
125 .stream_name = "Capture",
126 .cpu_dai_name = "samsung-pcm.0",
127 .codec_dai_name = "wm8580-hifi-capture",
128 .platform_name = "samsung-pcm.0",
129 .codec_name = "wm8580.0-001b",
130 .dai_fmt = SMDK_DAI_FMT,
131 .ops = &smdk_wm8580_pcm_ops,
132 },
133 };
134
135 static struct snd_soc_card smdk_pcm = {
136 .name = "SMDK-PCM",
137 .owner = THIS_MODULE,
138 .dai_link = smdk_dai,
139 .num_links = 2,
140 };
141
142 /*
143 * After SMDKC110 Base Board's Rev is '0.1', 12MHz External OSC(X1)
144 * is absent (or not connected), so we connect EXT_VOICE_CLK(OSC4),
145 * 2.0484Mhz, directly with MCLK both Codec and SoC.
146 */
snd_smdk_probe(struct platform_device * pdev)147 static int snd_smdk_probe(struct platform_device *pdev)
148 {
149 int ret = 0;
150
151 xtal_freq = SMDK_WM8580_EXT_OSC;
152 mclk_freq = SMDK_WM8580_EXT_MCLK;
153
154 if (machine_is_smdkc110() || machine_is_smdkv210())
155 xtal_freq = mclk_freq = SMDK_WM8580_EXT_VOICE;
156
157 smdk_pcm.dev = &pdev->dev;
158 ret = devm_snd_soc_register_card(&pdev->dev, &smdk_pcm);
159 if (ret)
160 dev_err(&pdev->dev, "snd_soc_register_card failed %d\n", ret);
161
162 return ret;
163 }
164
165 static struct platform_driver snd_smdk_driver = {
166 .driver = {
167 .name = "samsung-smdk-pcm",
168 },
169 .probe = snd_smdk_probe,
170 };
171
172 module_platform_driver(snd_smdk_driver);
173
174 MODULE_AUTHOR("Sangbeom Kim, <sbkim73@samsung.com>");
175 MODULE_DESCRIPTION("ALSA SoC SMDK WM8580 for PCM");
176 MODULE_LICENSE("GPL");
177