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1// SPDX-License-Identifier: GPL-2.0-or-later
2/*
3 * SoC audio for EDB93xx
4 *
5 * Copyright (c) 2010 Alexander Sverdlin <subaparts@yandex.ru>
6 *
7 * This driver support CS4271 codec being master or slave, working
8 * in control port mode, connected either via SPI or I2C.
9 * The data format accepted is I2S or left-justified.
10 * DAPM support not implemented.
11 */
12
13#include <linux/platform_device.h>
14#include <linux/gpio.h>
15#include <linux/module.h>
16#include <linux/soc/cirrus/ep93xx.h>
17#include <sound/core.h>
18#include <sound/pcm.h>
19#include <sound/soc.h>
20#include <asm/mach-types.h>
21
22static int edb93xx_hw_params(struct snd_pcm_substream *substream,
23 struct snd_pcm_hw_params *params)
24{
25 struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
26 struct snd_soc_dai *codec_dai = asoc_rtd_to_codec(rtd, 0);
27 struct snd_soc_dai *cpu_dai = asoc_rtd_to_cpu(rtd, 0);
28 int err;
29 unsigned int mclk_rate;
30 unsigned int rate = params_rate(params);
31
32 /*
33 * According to CS4271 datasheet we use MCLK/LRCK=256 for
34 * rates below 50kHz and 128 for higher sample rates
35 */
36 if (rate < 50000)
37 mclk_rate = rate * 64 * 4;
38 else
39 mclk_rate = rate * 64 * 2;
40
41 err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk_rate,
42 SND_SOC_CLOCK_IN);
43 if (err)
44 return err;
45
46 return snd_soc_dai_set_sysclk(cpu_dai, 0, mclk_rate,
47 SND_SOC_CLOCK_OUT);
48}
49
50static const struct snd_soc_ops edb93xx_ops = {
51 .hw_params = edb93xx_hw_params,
52};
53
54SND_SOC_DAILINK_DEFS(hifi,
55 DAILINK_COMP_ARRAY(COMP_CPU("ep93xx-i2s")),
56 DAILINK_COMP_ARRAY(COMP_CODEC("spi0.0", "cs4271-hifi")),
57 DAILINK_COMP_ARRAY(COMP_PLATFORM("ep93xx-i2s")));
58
59static struct snd_soc_dai_link edb93xx_dai = {
60 .name = "CS4271",
61 .stream_name = "CS4271 HiFi",
62 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
63 SND_SOC_DAIFMT_CBC_CFC,
64 .ops = &edb93xx_ops,
65 SND_SOC_DAILINK_REG(hifi),
66};
67
68static struct snd_soc_card snd_soc_edb93xx = {
69 .name = "EDB93XX",
70 .owner = THIS_MODULE,
71 .dai_link = &edb93xx_dai,
72 .num_links = 1,
73};
74
75static int edb93xx_probe(struct platform_device *pdev)
76{
77 struct snd_soc_card *card = &snd_soc_edb93xx;
78 int ret;
79
80 ret = ep93xx_i2s_acquire();
81 if (ret)
82 return ret;
83
84 card->dev = &pdev->dev;
85
86 ret = snd_soc_register_card(card);
87 if (ret) {
88 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
89 ret);
90 ep93xx_i2s_release();
91 }
92
93 return ret;
94}
95
96static int edb93xx_remove(struct platform_device *pdev)
97{
98 struct snd_soc_card *card = platform_get_drvdata(pdev);
99
100 snd_soc_unregister_card(card);
101 ep93xx_i2s_release();
102
103 return 0;
104}
105
106static struct platform_driver edb93xx_driver = {
107 .driver = {
108 .name = "edb93xx-audio",
109 },
110 .probe = edb93xx_probe,
111 .remove = edb93xx_remove,
112};
113
114module_platform_driver(edb93xx_driver);
115
116MODULE_AUTHOR("Alexander Sverdlin <subaparts@yandex.ru>");
117MODULE_DESCRIPTION("ALSA SoC EDB93xx");
118MODULE_LICENSE("GPL");
119MODULE_ALIAS("platform:edb93xx-audio");
1/*
2 * SoC audio for EDB93xx
3 *
4 * Copyright (c) 2010 Alexander Sverdlin <subaparts@yandex.ru>
5 *
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License
8 * as published by the Free Software Foundation; either version 2
9 * of the License, or (at your option) any later version.
10 *
11 * This program is distributed in the hope that it will be useful,
12 * but WITHOUT ANY WARRANTY; without even the implied warranty of
13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
14 * GNU General Public License for more details.
15 *
16 * This driver support CS4271 codec being master or slave, working
17 * in control port mode, connected either via SPI or I2C.
18 * The data format accepted is I2S or left-justified.
19 * DAPM support not implemented.
20 */
21
22#include <linux/platform_device.h>
23#include <linux/gpio.h>
24#include <linux/module.h>
25#include <sound/core.h>
26#include <sound/pcm.h>
27#include <sound/soc.h>
28#include <asm/mach-types.h>
29#include <mach/hardware.h>
30
31static int edb93xx_hw_params(struct snd_pcm_substream *substream,
32 struct snd_pcm_hw_params *params)
33{
34 struct snd_soc_pcm_runtime *rtd = substream->private_data;
35 struct snd_soc_dai *codec_dai = rtd->codec_dai;
36 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
37 int err;
38 unsigned int mclk_rate;
39 unsigned int rate = params_rate(params);
40
41 /*
42 * According to CS4271 datasheet we use MCLK/LRCK=256 for
43 * rates below 50kHz and 128 for higher sample rates
44 */
45 if (rate < 50000)
46 mclk_rate = rate * 64 * 4;
47 else
48 mclk_rate = rate * 64 * 2;
49
50 err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk_rate,
51 SND_SOC_CLOCK_IN);
52 if (err)
53 return err;
54
55 return snd_soc_dai_set_sysclk(cpu_dai, 0, mclk_rate,
56 SND_SOC_CLOCK_OUT);
57}
58
59static struct snd_soc_ops edb93xx_ops = {
60 .hw_params = edb93xx_hw_params,
61};
62
63static struct snd_soc_dai_link edb93xx_dai = {
64 .name = "CS4271",
65 .stream_name = "CS4271 HiFi",
66 .platform_name = "ep93xx-i2s",
67 .cpu_dai_name = "ep93xx-i2s",
68 .codec_name = "spi0.0",
69 .codec_dai_name = "cs4271-hifi",
70 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_IF |
71 SND_SOC_DAIFMT_CBS_CFS,
72 .ops = &edb93xx_ops,
73};
74
75static struct snd_soc_card snd_soc_edb93xx = {
76 .name = "EDB93XX",
77 .owner = THIS_MODULE,
78 .dai_link = &edb93xx_dai,
79 .num_links = 1,
80};
81
82static int edb93xx_probe(struct platform_device *pdev)
83{
84 struct snd_soc_card *card = &snd_soc_edb93xx;
85 int ret;
86
87 ret = ep93xx_i2s_acquire();
88 if (ret)
89 return ret;
90
91 card->dev = &pdev->dev;
92
93 ret = snd_soc_register_card(card);
94 if (ret) {
95 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
96 ret);
97 ep93xx_i2s_release();
98 }
99
100 return ret;
101}
102
103static int edb93xx_remove(struct platform_device *pdev)
104{
105 struct snd_soc_card *card = platform_get_drvdata(pdev);
106
107 snd_soc_unregister_card(card);
108 ep93xx_i2s_release();
109
110 return 0;
111}
112
113static struct platform_driver edb93xx_driver = {
114 .driver = {
115 .name = "edb93xx-audio",
116 },
117 .probe = edb93xx_probe,
118 .remove = edb93xx_remove,
119};
120
121module_platform_driver(edb93xx_driver);
122
123MODULE_AUTHOR("Alexander Sverdlin <subaparts@yandex.ru>");
124MODULE_DESCRIPTION("ALSA SoC EDB93xx");
125MODULE_LICENSE("GPL");
126MODULE_ALIAS("platform:edb93xx-audio");