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
imote2_asoc_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)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;
14 struct snd_soc_dai *codec_dai = rtd->codec_dai;
15 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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 ret = snd_soc_dai_set_sysclk(codec_dai, 0, clk,
34 SND_SOC_CLOCK_IN);
35 if (ret < 0)
36 return ret;
37
38 /* set the I2S system clock as input (unused) */
39 ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, clk,
40 SND_SOC_CLOCK_OUT);
41
42 return ret;
43 }
44
45 static struct snd_soc_ops imote2_asoc_ops = {
46 .hw_params = imote2_asoc_hw_params,
47 };
48
49 static struct snd_soc_dai_link imote2_dai = {
50 .name = "WM8940",
51 .stream_name = "WM8940",
52 .cpu_dai_name = "pxa2xx-i2s",
53 .codec_dai_name = "wm8940-hifi",
54 .platform_name = "pxa-pcm-audio",
55 .codec_name = "wm8940-codec.0-0034",
56 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
57 SND_SOC_DAIFMT_CBS_CFS,
58 .ops = &imote2_asoc_ops,
59 };
60
61 static struct snd_soc_card imote2 = {
62 .name = "Imote2",
63 .owner = THIS_MODULE,
64 .dai_link = &imote2_dai,
65 .num_links = 1,
66 };
67
imote2_probe(struct platform_device * pdev)68 static int imote2_probe(struct platform_device *pdev)
69 {
70 struct snd_soc_card *card = &imote2;
71 int ret;
72
73 card->dev = &pdev->dev;
74
75 ret = snd_soc_register_card(card);
76 if (ret)
77 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
78 ret);
79 return ret;
80 }
81
imote2_remove(struct platform_device * pdev)82 static int imote2_remove(struct platform_device *pdev)
83 {
84 struct snd_soc_card *card = platform_get_drvdata(pdev);
85
86 snd_soc_unregister_card(card);
87 return 0;
88 }
89
90 static struct platform_driver imote2_driver = {
91 .driver = {
92 .name = "imote2-audio",
93 .owner = THIS_MODULE,
94 .pm = &snd_soc_pm_ops,
95 },
96 .probe = imote2_probe,
97 .remove = imote2_remove,
98 };
99
100 module_platform_driver(imote2_driver);
101
102 MODULE_AUTHOR("Jonathan Cameron");
103 MODULE_DESCRIPTION("ALSA SoC Imote 2");
104 MODULE_LICENSE("GPL");
105 MODULE_ALIAS("platform:imote2-audio");
106