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
10static 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
45static struct snd_soc_ops imote2_asoc_ops = {
46	.hw_params = imote2_asoc_hw_params,
47};
48
49static 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
61static struct snd_soc_card imote2 = {
62	.name = "Imote2",
63	.owner = THIS_MODULE,
64	.dai_link = &imote2_dai,
65	.num_links = 1,
66};
67
68static 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 = devm_snd_soc_register_card(&pdev->dev, card);
76	if (ret)
77		dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
78			ret);
79	return ret;
80}
81
82static struct platform_driver imote2_driver = {
83	.driver		= {
84		.name	= "imote2-audio",
85		.pm     = &snd_soc_pm_ops,
86	},
87	.probe		= imote2_probe,
88};
89
90module_platform_driver(imote2_driver);
91
92MODULE_AUTHOR("Jonathan Cameron");
93MODULE_DESCRIPTION("ALSA SoC Imote 2");
94MODULE_LICENSE("GPL");
95MODULE_ALIAS("platform:imote2-audio");
96