1/*
2 * eukrea-tlv320.c  --  SoC audio for eukrea_cpuimxXX in I2S mode
3 *
4 * Copyright 2010 Eric Bénard, Eukréa Electromatique <eric@eukrea.com>
5 *
6 * based on sound/soc/s3c24xx/s3c24xx_simtec_tlv320aic23.c
7 * which is Copyright 2009 Simtec Electronics
8 * and on sound/soc/imx/phycore-ac97.c which is
9 * Copyright 2009 Sascha Hauer, Pengutronix <s.hauer@pengutronix.de>
10 *
11 *  This program is free software; you can redistribute  it and/or modify it
12 *  under  the terms of  the GNU General  Public License as published by the
13 *  Free Software Foundation;  either version 2 of the  License, or (at your
14 *  option) any later version.
15 *
16 */
17
18#include <linux/module.h>
19#include <linux/moduleparam.h>
20#include <linux/device.h>
21#include <linux/i2c.h>
22#include <sound/core.h>
23#include <sound/pcm.h>
24#include <sound/soc.h>
25#include <asm/mach-types.h>
26
27#include "../codecs/tlv320aic23.h"
28#include "imx-ssi.h"
29
30#define CODEC_CLOCK 12000000
31
32static int eukrea_tlv320_hw_params(struct snd_pcm_substream *substream,
33			    struct snd_pcm_hw_params *params)
34{
35	struct snd_soc_pcm_runtime *rtd = substream->private_data;
36	struct snd_soc_dai *codec_dai = rtd->codec_dai;
37	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
38	int ret;
39
40	ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
41				  SND_SOC_DAIFMT_NB_NF |
42				  SND_SOC_DAIFMT_CBM_CFM);
43	if (ret) {
44		pr_err("%s: failed set cpu dai format\n", __func__);
45		return ret;
46	}
47
48	ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
49				  SND_SOC_DAIFMT_NB_NF |
50				  SND_SOC_DAIFMT_CBM_CFM);
51	if (ret) {
52		pr_err("%s: failed set codec dai format\n", __func__);
53		return ret;
54	}
55
56	ret = snd_soc_dai_set_sysclk(codec_dai, 0,
57				     CODEC_CLOCK, SND_SOC_CLOCK_OUT);
58	if (ret) {
59		pr_err("%s: failed setting codec sysclk\n", __func__);
60		return ret;
61	}
62	snd_soc_dai_set_tdm_slot(cpu_dai, 0xffffffc, 0xffffffc, 2, 0);
63
64	ret = snd_soc_dai_set_sysclk(cpu_dai, IMX_SSP_SYS_CLK, 0,
65				SND_SOC_CLOCK_IN);
66	if (ret) {
67		pr_err("can't set CPU system clock IMX_SSP_SYS_CLK\n");
68		return ret;
69	}
70
71	return 0;
72}
73
74static struct snd_soc_ops eukrea_tlv320_snd_ops = {
75	.hw_params	= eukrea_tlv320_hw_params,
76};
77
78static struct snd_soc_dai_link eukrea_tlv320_dai = {
79	.name		= "tlv320aic23",
80	.stream_name	= "TLV320AIC23",
81	.codec_dai_name	= "tlv320aic23-hifi",
82	.platform_name	= "imx-fiq-pcm-audio.0",
83	.codec_name	= "tlv320aic23-codec.0-001a",
84	.cpu_dai_name	= "imx-ssi.0",
85	.ops		= &eukrea_tlv320_snd_ops,
86};
87
88static struct snd_soc_card eukrea_tlv320 = {
89	.name		= "cpuimx-audio",
90	.dai_link	= &eukrea_tlv320_dai,
91	.num_links	= 1,
92};
93
94static struct platform_device *eukrea_tlv320_snd_device;
95
96static int __init eukrea_tlv320_init(void)
97{
98	int ret;
99
100	if (!machine_is_eukrea_cpuimx27() && !machine_is_eukrea_cpuimx25sd()
101		&& !machine_is_eukrea_cpuimx35sd()
102		&& !machine_is_eukrea_cpuimx51sd())
103		/* return happy. We might run on a totally different machine */
104		return 0;
105
106	eukrea_tlv320_snd_device = platform_device_alloc("soc-audio", -1);
107	if (!eukrea_tlv320_snd_device)
108		return -ENOMEM;
109
110	platform_set_drvdata(eukrea_tlv320_snd_device, &eukrea_tlv320);
111	ret = platform_device_add(eukrea_tlv320_snd_device);
112
113	if (ret) {
114		printk(KERN_ERR "ASoC: Platform device allocation failed\n");
115		platform_device_put(eukrea_tlv320_snd_device);
116	}
117
118	return ret;
119}
120
121static void __exit eukrea_tlv320_exit(void)
122{
123	platform_device_unregister(eukrea_tlv320_snd_device);
124}
125
126module_init(eukrea_tlv320_init);
127module_exit(eukrea_tlv320_exit);
128
129MODULE_AUTHOR("Eric Bénard <eric@eukrea.com>");
130MODULE_DESCRIPTION("CPUIMX ALSA SoC driver");
131MODULE_LICENSE("GPL");
132