diff options
Diffstat (limited to 'sound/soc/cirrus/edb93xx.c')
-rw-r--r-- | sound/soc/cirrus/edb93xx.c | 128 |
1 files changed, 128 insertions, 0 deletions
diff --git a/sound/soc/cirrus/edb93xx.c b/sound/soc/cirrus/edb93xx.c new file mode 100644 index 000000000000..e01cb02abd3a --- /dev/null +++ b/sound/soc/cirrus/edb93xx.c | |||
@@ -0,0 +1,128 @@ | |||
1 | /* | ||
2 | * SoC audio for EDB93xx | ||
3 | * | ||
4 | * Copyright (c) 2010 Alexander Sverdlin <subaparts@yandex.ru> | ||
5 | * | ||
6 | * This program is free software; you can redistribute it and/or | ||
7 | * modify it under the terms of the GNU General Public License | ||
8 | * as published by the Free Software Foundation; either version 2 | ||
9 | * of the License, or (at your option) any later version. | ||
10 | * | ||
11 | * This program is distributed in the hope that it will be useful, | ||
12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | ||
14 | * GNU General Public License for more details. | ||
15 | * | ||
16 | * This driver support CS4271 codec being master or slave, working | ||
17 | * in control port mode, connected either via SPI or I2C. | ||
18 | * The data format accepted is I2S or left-justified. | ||
19 | * DAPM support not implemented. | ||
20 | */ | ||
21 | |||
22 | #include <linux/platform_device.h> | ||
23 | #include <linux/gpio.h> | ||
24 | #include <linux/module.h> | ||
25 | #include <sound/core.h> | ||
26 | #include <sound/pcm.h> | ||
27 | #include <sound/soc.h> | ||
28 | #include <asm/mach-types.h> | ||
29 | #include <mach/hardware.h> | ||
30 | #include "ep93xx-pcm.h" | ||
31 | |||
32 | static int edb93xx_hw_params(struct snd_pcm_substream *substream, | ||
33 | struct snd_pcm_hw_params *params) | ||
34 | { | ||
35 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | ||
36 | struct snd_soc_dai *codec_dai = rtd->codec_dai; | ||
37 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; | ||
38 | int err; | ||
39 | unsigned int mclk_rate; | ||
40 | unsigned int rate = params_rate(params); | ||
41 | |||
42 | /* | ||
43 | * According to CS4271 datasheet we use MCLK/LRCK=256 for | ||
44 | * rates below 50kHz and 128 for higher sample rates | ||
45 | */ | ||
46 | if (rate < 50000) | ||
47 | mclk_rate = rate * 64 * 4; | ||
48 | else | ||
49 | mclk_rate = rate * 64 * 2; | ||
50 | |||
51 | err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk_rate, | ||
52 | SND_SOC_CLOCK_IN); | ||
53 | if (err) | ||
54 | return err; | ||
55 | |||
56 | return snd_soc_dai_set_sysclk(cpu_dai, 0, mclk_rate, | ||
57 | SND_SOC_CLOCK_OUT); | ||
58 | } | ||
59 | |||
60 | static struct snd_soc_ops edb93xx_ops = { | ||
61 | .hw_params = edb93xx_hw_params, | ||
62 | }; | ||
63 | |||
64 | static struct snd_soc_dai_link edb93xx_dai = { | ||
65 | .name = "CS4271", | ||
66 | .stream_name = "CS4271 HiFi", | ||
67 | .platform_name = "ep93xx-pcm-audio", | ||
68 | .cpu_dai_name = "ep93xx-i2s", | ||
69 | .codec_name = "spi0.0", | ||
70 | .codec_dai_name = "cs4271-hifi", | ||
71 | .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_IF | | ||
72 | SND_SOC_DAIFMT_CBS_CFS, | ||
73 | .ops = &edb93xx_ops, | ||
74 | }; | ||
75 | |||
76 | static struct snd_soc_card snd_soc_edb93xx = { | ||
77 | .name = "EDB93XX", | ||
78 | .owner = THIS_MODULE, | ||
79 | .dai_link = &edb93xx_dai, | ||
80 | .num_links = 1, | ||
81 | }; | ||
82 | |||
83 | static int __devinit edb93xx_probe(struct platform_device *pdev) | ||
84 | { | ||
85 | struct snd_soc_card *card = &snd_soc_edb93xx; | ||
86 | int ret; | ||
87 | |||
88 | ret = ep93xx_i2s_acquire(); | ||
89 | if (ret) | ||
90 | return ret; | ||
91 | |||
92 | card->dev = &pdev->dev; | ||
93 | |||
94 | ret = snd_soc_register_card(card); | ||
95 | if (ret) { | ||
96 | dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n", | ||
97 | ret); | ||
98 | ep93xx_i2s_release(); | ||
99 | } | ||
100 | |||
101 | return ret; | ||
102 | } | ||
103 | |||
104 | static int __devexit edb93xx_remove(struct platform_device *pdev) | ||
105 | { | ||
106 | struct snd_soc_card *card = platform_get_drvdata(pdev); | ||
107 | |||
108 | snd_soc_unregister_card(card); | ||
109 | ep93xx_i2s_release(); | ||
110 | |||
111 | return 0; | ||
112 | } | ||
113 | |||
114 | static struct platform_driver edb93xx_driver = { | ||
115 | .driver = { | ||
116 | .name = "edb93xx-audio", | ||
117 | .owner = THIS_MODULE, | ||
118 | }, | ||
119 | .probe = edb93xx_probe, | ||
120 | .remove = __devexit_p(edb93xx_remove), | ||
121 | }; | ||
122 | |||
123 | module_platform_driver(edb93xx_driver); | ||
124 | |||
125 | MODULE_AUTHOR("Alexander Sverdlin <subaparts@yandex.ru>"); | ||
126 | MODULE_DESCRIPTION("ALSA SoC EDB93xx"); | ||
127 | MODULE_LICENSE("GPL"); | ||
128 | MODULE_ALIAS("platform:edb93xx-audio"); | ||