Commit | Line | Data |
---|---|---|
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" | |
9 | #include "pxa2xx-pcm.h" | |
10 | ||
11 | static int imote2_asoc_hw_params(struct snd_pcm_substream *substream, | |
12 | struct snd_pcm_hw_params *params) | |
13 | { | |
14 | struct snd_soc_pcm_runtime *rtd = substream->private_data; | |
15 | struct snd_soc_dai *codec_dai = rtd->dai->codec_dai; | |
16 | struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai; | |
17 | unsigned int clk = 0; | |
18 | int ret; | |
19 | ||
20 | switch (params_rate(params)) { | |
21 | case 8000: | |
22 | case 16000: | |
23 | case 48000: | |
24 | case 96000: | |
25 | clk = 12288000; | |
26 | break; | |
27 | case 11025: | |
28 | case 22050: | |
29 | case 44100: | |
30 | clk = 11289600; | |
31 | break; | |
32 | } | |
33 | ||
34 | /* set codec DAI configuration */ | |
35 | ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S | |
36 | | SND_SOC_DAIFMT_NB_NF | |
37 | | SND_SOC_DAIFMT_CBS_CFS); | |
38 | if (ret < 0) | |
39 | return ret; | |
40 | ||
41 | /* CPU should be clock master */ | |
42 | ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S | |
43 | | SND_SOC_DAIFMT_NB_NF | |
44 | | SND_SOC_DAIFMT_CBS_CFS); | |
45 | if (ret < 0) | |
46 | return ret; | |
47 | ||
48 | ret = snd_soc_dai_set_sysclk(codec_dai, 0, clk, | |
49 | SND_SOC_CLOCK_IN); | |
50 | if (ret < 0) | |
51 | return ret; | |
52 | ||
53 | /* set the I2S system clock as input (unused) */ | |
54 | ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, clk, | |
55 | SND_SOC_CLOCK_OUT); | |
56 | ||
57 | return ret; | |
58 | } | |
59 | ||
60 | static struct snd_soc_ops imote2_asoc_ops = { | |
61 | .hw_params = imote2_asoc_hw_params, | |
62 | }; | |
63 | ||
64 | static struct snd_soc_dai_link imote2_dai = { | |
65 | .name = "WM8940", | |
66 | .stream_name = "WM8940", | |
67 | .cpu_dai = &pxa_i2s_dai, | |
68 | .codec_dai = &wm8940_dai, | |
69 | .ops = &imote2_asoc_ops, | |
70 | }; | |
71 | ||
72 | static struct snd_soc_card snd_soc_imote2 = { | |
73 | .name = "Imote2", | |
74 | .platform = &pxa2xx_soc_platform, | |
75 | .dai_link = &imote2_dai, | |
76 | .num_links = 1, | |
77 | }; | |
78 | ||
79 | static struct snd_soc_device imote2_snd_devdata = { | |
80 | .card = &snd_soc_imote2, | |
81 | .codec_dev = &soc_codec_dev_wm8940, | |
82 | }; | |
83 | ||
84 | static struct platform_device *imote2_snd_device; | |
85 | ||
86 | static int __init imote2_asoc_init(void) | |
87 | { | |
88 | int ret; | |
89 | ||
90 | if (!machine_is_intelmote2()) | |
91 | return -ENODEV; | |
92 | imote2_snd_device = platform_device_alloc("soc-audio", -1); | |
93 | if (!imote2_snd_device) | |
94 | return -ENOMEM; | |
95 | ||
96 | platform_set_drvdata(imote2_snd_device, &imote2_snd_devdata); | |
97 | imote2_snd_devdata.dev = &imote2_snd_device->dev; | |
98 | ret = platform_device_add(imote2_snd_device); | |
99 | if (ret) | |
100 | platform_device_put(imote2_snd_device); | |
101 | ||
102 | return ret; | |
103 | } | |
104 | module_init(imote2_asoc_init); | |
105 | ||
106 | static void __exit imote2_asoc_exit(void) | |
107 | { | |
108 | platform_device_unregister(imote2_snd_device); | |
109 | } | |
110 | module_exit(imote2_asoc_exit); | |
111 | ||
112 | MODULE_AUTHOR("Jonathan Cameron"); | |
113 | MODULE_DESCRIPTION("ALSA SoC Imote 2"); | |
114 | MODULE_LICENSE("GPL"); |