Commit | Line | Data |
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a195b51b JC |
1 | |
2 | #include <linux/module.h> | |
3 | #include <sound/soc.h> | |
4 | ||
5 | #include <asm/mach-types.h> | |
6 | ||
7 | #include "../codecs/wm8940.h" | |
8 | #include "pxa2xx-i2s.h" | |
a195b51b JC |
9 | |
10 | static int imote2_asoc_hw_params(struct snd_pcm_substream *substream, | |
11 | struct snd_pcm_hw_params *params) | |
12 | { | |
13 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
f0fba2ad LG |
14 | struct snd_soc_dai *codec_dai = rtd->codec_dai; |
15 | struct snd_soc_dai *cpu_dai = rtd->cpu_dai; | |
a195b51b JC |
16 | unsigned int clk = 0; |
17 | int ret; | |
18 | ||
19 | switch (params_rate(params)) { | |
20 | case 8000: | |
21 | case 16000: | |
22 | case 48000: | |
23 | case 96000: | |
24 | clk = 12288000; | |
25 | break; | |
26 | case 11025: | |
27 | case 22050: | |
28 | case 44100: | |
29 | clk = 11289600; | |
30 | break; | |
31 | } | |
32 | ||
33 | /* set codec DAI configuration */ | |
34 | ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S | |
35 | | SND_SOC_DAIFMT_NB_NF | |
36 | | SND_SOC_DAIFMT_CBS_CFS); | |
37 | if (ret < 0) | |
38 | return ret; | |
39 | ||
40 | /* CPU should be clock master */ | |
41 | ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S | |
42 | | SND_SOC_DAIFMT_NB_NF | |
43 | | SND_SOC_DAIFMT_CBS_CFS); | |
44 | if (ret < 0) | |
45 | return ret; | |
46 | ||
47 | ret = snd_soc_dai_set_sysclk(codec_dai, 0, clk, | |
48 | SND_SOC_CLOCK_IN); | |
49 | if (ret < 0) | |
50 | return ret; | |
51 | ||
52 | /* set the I2S system clock as input (unused) */ | |
53 | ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, clk, | |
54 | SND_SOC_CLOCK_OUT); | |
55 | ||
56 | return ret; | |
57 | } | |
58 | ||
59 | static struct snd_soc_ops imote2_asoc_ops = { | |
60 | .hw_params = imote2_asoc_hw_params, | |
61 | }; | |
62 | ||
63 | static struct snd_soc_dai_link imote2_dai = { | |
64 | .name = "WM8940", | |
65 | .stream_name = "WM8940", | |
a2a0086d | 66 | .cpu_dai_name = "pxa2xx-i2s", |
f0fba2ad LG |
67 | .codec_dai_name = "wm8940-hifi", |
68 | .platform_name = "pxa-pcm-audio", | |
69 | .codec_name = "wm8940-codec.0-0034", | |
a195b51b JC |
70 | .ops = &imote2_asoc_ops, |
71 | }; | |
72 | ||
73 | static struct snd_soc_card snd_soc_imote2 = { | |
74 | .name = "Imote2", | |
a195b51b JC |
75 | .dai_link = &imote2_dai, |
76 | .num_links = 1, | |
77 | }; | |
78 | ||
a195b51b JC |
79 | static struct platform_device *imote2_snd_device; |
80 | ||
81 | static int __init imote2_asoc_init(void) | |
82 | { | |
83 | int ret; | |
84 | ||
85 | if (!machine_is_intelmote2()) | |
86 | return -ENODEV; | |
87 | imote2_snd_device = platform_device_alloc("soc-audio", -1); | |
88 | if (!imote2_snd_device) | |
89 | return -ENOMEM; | |
90 | ||
f0fba2ad | 91 | platform_set_drvdata(imote2_snd_device, &snd_soc_imote2); |
a195b51b JC |
92 | ret = platform_device_add(imote2_snd_device); |
93 | if (ret) | |
94 | platform_device_put(imote2_snd_device); | |
95 | ||
96 | return ret; | |
97 | } | |
98 | module_init(imote2_asoc_init); | |
99 | ||
100 | static void __exit imote2_asoc_exit(void) | |
101 | { | |
102 | platform_device_unregister(imote2_snd_device); | |
103 | } | |
104 | module_exit(imote2_asoc_exit); | |
105 | ||
106 | MODULE_AUTHOR("Jonathan Cameron"); | |
107 | MODULE_DESCRIPTION("ALSA SoC Imote 2"); | |
108 | MODULE_LICENSE("GPL"); |