xref: /kernel/linux/linux-5.10/sound/soc/pxa/imote2.c (revision 8c2ecf20) 
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
11static 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
46static const struct snd_soc_ops imote2_asoc_ops = {
47	.hw_params = imote2_asoc_hw_params,
48};
49
50SND_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
56static 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
65static struct snd_soc_card imote2 = {
66	.name = "Imote2",
67	.owner = THIS_MODULE,
68	.dai_link = &imote2_dai,
69	.num_links = 1,
70};
71
72static 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
86static struct platform_driver imote2_driver = {
87	.driver		= {
88		.name	= "imote2-audio",
89		.pm     = &snd_soc_pm_ops,
90	},
91	.probe		= imote2_probe,
92};
93
94module_platform_driver(imote2_driver);
95
96MODULE_AUTHOR("Jonathan Cameron");
97MODULE_DESCRIPTION("ALSA SoC Imote 2");
98MODULE_LICENSE("GPL");
99MODULE_ALIAS("platform:imote2-audio");
100