1/*
2 * snappercl15.c -- SoC audio for Bluewater Systems Snapper CL15 module
3 *
4 * Copyright (C) 2008 Bluewater Systems Ltd
5 * Author: Ryan Mallon
6 *
7 *  This program is free software; you can redistribute  it and/or modify it
8 *  under  the terms of  the GNU General  Public License as published by the
9 *  Free Software Foundation;  either version 2 of the  License, or (at your
10 *  option) any later version.
11 *
12 */
13
14#include <linux/platform_device.h>
15#include <linux/module.h>
16#include <sound/core.h>
17#include <sound/pcm.h>
18#include <sound/soc.h>
19
20#include <asm/mach-types.h>
21#include <mach/hardware.h>
22
23#include "../codecs/tlv320aic23.h"
24
25#define CODEC_CLOCK 5644800
26
27static int snappercl15_hw_params(struct snd_pcm_substream *substream,
28				 struct snd_pcm_hw_params *params)
29{
30	struct snd_soc_pcm_runtime *rtd = substream->private_data;
31	struct snd_soc_dai *codec_dai = rtd->codec_dai;
32	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
33	int err;
34
35	err = snd_soc_dai_set_sysclk(codec_dai, 0, CODEC_CLOCK,
36				     SND_SOC_CLOCK_IN);
37	if (err)
38		return err;
39
40	err = snd_soc_dai_set_sysclk(cpu_dai, 0, CODEC_CLOCK,
41				     SND_SOC_CLOCK_OUT);
42	if (err)
43		return err;
44
45	return 0;
46}
47
48static struct snd_soc_ops snappercl15_ops = {
49	.hw_params	= snappercl15_hw_params,
50};
51
52static const struct snd_soc_dapm_widget tlv320aic23_dapm_widgets[] = {
53	SND_SOC_DAPM_HP("Headphone Jack", NULL),
54	SND_SOC_DAPM_LINE("Line In", NULL),
55	SND_SOC_DAPM_MIC("Mic Jack", NULL),
56};
57
58static const struct snd_soc_dapm_route audio_map[] = {
59	{"Headphone Jack", NULL, "LHPOUT"},
60	{"Headphone Jack", NULL, "RHPOUT"},
61
62	{"LLINEIN", NULL, "Line In"},
63	{"RLINEIN", NULL, "Line In"},
64
65	{"MICIN", NULL, "Mic Jack"},
66};
67
68static struct snd_soc_dai_link snappercl15_dai = {
69	.name		= "tlv320aic23",
70	.stream_name	= "AIC23",
71	.cpu_dai_name	= "ep93xx-i2s",
72	.codec_dai_name	= "tlv320aic23-hifi",
73	.codec_name	= "tlv320aic23-codec.0-001a",
74	.platform_name	= "ep93xx-i2s",
75	.dai_fmt	= SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_IF |
76			  SND_SOC_DAIFMT_CBS_CFS,
77	.ops		= &snappercl15_ops,
78};
79
80static struct snd_soc_card snd_soc_snappercl15 = {
81	.name		= "Snapper CL15",
82	.owner		= THIS_MODULE,
83	.dai_link	= &snappercl15_dai,
84	.num_links	= 1,
85
86	.dapm_widgets		= tlv320aic23_dapm_widgets,
87	.num_dapm_widgets	= ARRAY_SIZE(tlv320aic23_dapm_widgets),
88	.dapm_routes		= audio_map,
89	.num_dapm_routes	= ARRAY_SIZE(audio_map),
90};
91
92static int snappercl15_probe(struct platform_device *pdev)
93{
94	struct snd_soc_card *card = &snd_soc_snappercl15;
95	int ret;
96
97	ret = ep93xx_i2s_acquire();
98	if (ret)
99		return ret;
100
101	card->dev = &pdev->dev;
102
103	ret = snd_soc_register_card(card);
104	if (ret) {
105		dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
106			ret);
107		ep93xx_i2s_release();
108	}
109
110	return ret;
111}
112
113static int snappercl15_remove(struct platform_device *pdev)
114{
115	struct snd_soc_card *card = platform_get_drvdata(pdev);
116
117	snd_soc_unregister_card(card);
118	ep93xx_i2s_release();
119
120	return 0;
121}
122
123static struct platform_driver snappercl15_driver = {
124	.driver		= {
125		.name	= "snappercl15-audio",
126	},
127	.probe		= snappercl15_probe,
128	.remove		= snappercl15_remove,
129};
130
131module_platform_driver(snappercl15_driver);
132
133MODULE_AUTHOR("Ryan Mallon");
134MODULE_DESCRIPTION("ALSA SoC Snapper CL15");
135MODULE_LICENSE("GPL");
136MODULE_ALIAS("platform:snappercl15-audio");
137