1/*
2 * e740-wm9705.c  --  SoC audio for e740
3 *
4 * Copyright 2007 (c) Ian Molton <spyro@f2s.com>
5 *
6 *  This program is free software; you can redistribute  it and/or modify it
7 *  under  the terms of  the GNU General  Public License as published by the
8 *  Free Software Foundation; version 2 ONLY.
9 *
10 */
11
12#include <linux/module.h>
13#include <linux/moduleparam.h>
14#include <linux/gpio.h>
15
16#include <sound/core.h>
17#include <sound/pcm.h>
18#include <sound/soc.h>
19
20#include <mach/audio.h>
21#include <mach/eseries-gpio.h>
22
23#include <asm/mach-types.h>
24
25#include "../codecs/wm9705.h"
26#include "pxa2xx-ac97.h"
27
28
29#define E740_AUDIO_OUT 1
30#define E740_AUDIO_IN  2
31
32static int e740_audio_power;
33
34static void e740_sync_audio_power(int status)
35{
36	gpio_set_value(GPIO_E740_WM9705_nAVDD2, !status);
37	gpio_set_value(GPIO_E740_AMP_ON, (status & E740_AUDIO_OUT) ? 1 : 0);
38	gpio_set_value(GPIO_E740_MIC_ON, (status & E740_AUDIO_IN) ? 1 : 0);
39}
40
41static int e740_mic_amp_event(struct snd_soc_dapm_widget *w,
42				struct snd_kcontrol *kcontrol, int event)
43{
44	if (event & SND_SOC_DAPM_PRE_PMU)
45		e740_audio_power |= E740_AUDIO_IN;
46	else if (event & SND_SOC_DAPM_POST_PMD)
47		e740_audio_power &= ~E740_AUDIO_IN;
48
49	e740_sync_audio_power(e740_audio_power);
50
51	return 0;
52}
53
54static int e740_output_amp_event(struct snd_soc_dapm_widget *w,
55				struct snd_kcontrol *kcontrol, int event)
56{
57	if (event & SND_SOC_DAPM_PRE_PMU)
58		e740_audio_power |= E740_AUDIO_OUT;
59	else if (event & SND_SOC_DAPM_POST_PMD)
60		e740_audio_power &= ~E740_AUDIO_OUT;
61
62	e740_sync_audio_power(e740_audio_power);
63
64	return 0;
65}
66
67static const struct snd_soc_dapm_widget e740_dapm_widgets[] = {
68	SND_SOC_DAPM_HP("Headphone Jack", NULL),
69	SND_SOC_DAPM_SPK("Speaker", NULL),
70	SND_SOC_DAPM_MIC("Mic (Internal)", NULL),
71	SND_SOC_DAPM_PGA_E("Output Amp", SND_SOC_NOPM, 0, 0, NULL, 0,
72			e740_output_amp_event, SND_SOC_DAPM_PRE_PMU |
73			SND_SOC_DAPM_POST_PMD),
74	SND_SOC_DAPM_PGA_E("Mic Amp", SND_SOC_NOPM, 0, 0, NULL, 0,
75			e740_mic_amp_event, SND_SOC_DAPM_PRE_PMU |
76			SND_SOC_DAPM_POST_PMD),
77};
78
79static const struct snd_soc_dapm_route audio_map[] = {
80	{"Output Amp", NULL, "LOUT"},
81	{"Output Amp", NULL, "ROUT"},
82	{"Output Amp", NULL, "MONOOUT"},
83
84	{"Speaker", NULL, "Output Amp"},
85	{"Headphone Jack", NULL, "Output Amp"},
86
87	{"MIC1", NULL, "Mic Amp"},
88	{"Mic Amp", NULL, "Mic (Internal)"},
89};
90
91static struct snd_soc_dai_link e740_dai[] = {
92	{
93		.name = "AC97",
94		.stream_name = "AC97 HiFi",
95		.cpu_dai_name = "pxa2xx-ac97",
96		.codec_dai_name = "wm9705-hifi",
97		.platform_name = "pxa-pcm-audio",
98		.codec_name = "wm9705-codec",
99	},
100	{
101		.name = "AC97 Aux",
102		.stream_name = "AC97 Aux",
103		.cpu_dai_name = "pxa2xx-ac97-aux",
104		.codec_dai_name = "wm9705-aux",
105		.platform_name = "pxa-pcm-audio",
106		.codec_name = "wm9705-codec",
107	},
108};
109
110static struct snd_soc_card e740 = {
111	.name = "Toshiba e740",
112	.owner = THIS_MODULE,
113	.dai_link = e740_dai,
114	.num_links = ARRAY_SIZE(e740_dai),
115
116	.dapm_widgets = e740_dapm_widgets,
117	.num_dapm_widgets = ARRAY_SIZE(e740_dapm_widgets),
118	.dapm_routes = audio_map,
119	.num_dapm_routes = ARRAY_SIZE(audio_map),
120	.fully_routed = true,
121};
122
123static struct gpio e740_audio_gpios[] = {
124	{ GPIO_E740_MIC_ON, GPIOF_OUT_INIT_LOW, "Mic amp" },
125	{ GPIO_E740_AMP_ON, GPIOF_OUT_INIT_LOW, "Output amp" },
126	{ GPIO_E740_WM9705_nAVDD2, GPIOF_OUT_INIT_HIGH, "Audio power" },
127};
128
129static int e740_probe(struct platform_device *pdev)
130{
131	struct snd_soc_card *card = &e740;
132	int ret;
133
134	ret = gpio_request_array(e740_audio_gpios,
135				 ARRAY_SIZE(e740_audio_gpios));
136	if (ret)
137		return ret;
138
139	card->dev = &pdev->dev;
140
141	ret = devm_snd_soc_register_card(&pdev->dev, card);
142	if (ret) {
143		dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
144			ret);
145		gpio_free_array(e740_audio_gpios, ARRAY_SIZE(e740_audio_gpios));
146	}
147	return ret;
148}
149
150static int e740_remove(struct platform_device *pdev)
151{
152	gpio_free_array(e740_audio_gpios, ARRAY_SIZE(e740_audio_gpios));
153	return 0;
154}
155
156static struct platform_driver e740_driver = {
157	.driver		= {
158		.name	= "e740-audio",
159		.pm     = &snd_soc_pm_ops,
160	},
161	.probe		= e740_probe,
162	.remove		= e740_remove,
163};
164
165module_platform_driver(e740_driver);
166
167/* Module information */
168MODULE_AUTHOR("Ian Molton <spyro@f2s.com>");
169MODULE_DESCRIPTION("ALSA SoC driver for e740");
170MODULE_LICENSE("GPL v2");
171MODULE_ALIAS("platform:e740-audio");
172