1 // SPDX-License-Identifier: GPL-2.0-only
2
3 #include <linux/module.h>
4 #include <sound/soc.h>
5
6 #include <asm/mach-types.h>
7
8 #include "../codecs/wm8940.h"
9 #include "pxa2xx-i2s.h"
10
imote2_asoc_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)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 = asoc_substream_to_rtd(substream);
15 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
16 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
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 ret = snd_soc_dai_set_sysclk(codec_dai, 0, clk,
35 SND_SOC_CLOCK_IN);
36 if (ret < 0)
37 return ret;
38
39 /* set the I2S system clock as input (unused) */
40 ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, clk,
41 SND_SOC_CLOCK_OUT);
42
43 return ret;
44 }
45
46 static const struct snd_soc_ops imote2_asoc_ops = {
47 .hw_params = imote2_asoc_hw_params,
48 };
49
50 SND_SOC_DAILINK_DEFS(wm8940,
51 DAILINK_COMP_ARRAY(COMP_CPU("pxa2xx-i2s")),
52 DAILINK_COMP_ARRAY(COMP_CODEC("wm8940-codec.0-0034",
53 "wm8940-hifi")),
54 DAILINK_COMP_ARRAY(COMP_PLATFORM("pxa-pcm-audio")));
55
56 static struct snd_soc_dai_link imote2_dai = {
57 .name = "WM8940",
58 .stream_name = "WM8940",
59 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
60 SND_SOC_DAIFMT_CBS_CFS,
61 .ops = &imote2_asoc_ops,
62 SND_SOC_DAILINK_REG(wm8940),
63 };
64
65 static struct snd_soc_card imote2 = {
66 .name = "Imote2",
67 .owner = THIS_MODULE,
68 .dai_link = &imote2_dai,
69 .num_links = 1,
70 };
71
imote2_probe(struct platform_device * pdev)72 static int imote2_probe(struct platform_device *pdev)
73 {
74 struct snd_soc_card *card = &imote2;
75 int ret;
76
77 card->dev = &pdev->dev;
78
79 ret = devm_snd_soc_register_card(&pdev->dev, card);
80 if (ret)
81 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
82 ret);
83 return ret;
84 }
85
86 static struct platform_driver imote2_driver = {
87 .driver = {
88 .name = "imote2-audio",
89 .pm = &snd_soc_pm_ops,
90 },
91 .probe = imote2_probe,
92 };
93
94 module_platform_driver(imote2_driver);
95
96 MODULE_AUTHOR("Jonathan Cameron");
97 MODULE_DESCRIPTION("ALSA SoC Imote 2");
98 MODULE_LICENSE("GPL");
99 MODULE_ALIAS("platform:imote2-audio");
100