1/*
2 * SoC audio for HP iPAQ hx4700
3 *
4 * Copyright (c) 2009 Philipp Zabel
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;  either version 2 of the  License, or (at your
9 *  option) any later version.
10 *
11 */
12
13#include <linux/module.h>
14#include <linux/timer.h>
15#include <linux/interrupt.h>
16#include <linux/platform_device.h>
17#include <linux/delay.h>
18#include <linux/gpio.h>
19
20#include <sound/core.h>
21#include <sound/jack.h>
22#include <sound/pcm.h>
23#include <sound/pcm_params.h>
24#include <sound/soc.h>
25
26#include <mach/hx4700.h>
27#include <asm/mach-types.h>
28#include "pxa2xx-i2s.h"
29
30#include "../codecs/ak4641.h"
31
32static struct snd_soc_jack hs_jack;
33
34/* Headphones jack detection DAPM pin */
35static struct snd_soc_jack_pin hs_jack_pin[] = {
36	{
37		.pin	= "Headphone Jack",
38		.mask	= SND_JACK_HEADPHONE,
39	},
40	{
41		.pin	= "Speaker",
42		/* disable speaker when hp jack is inserted */
43		.mask   = SND_JACK_HEADPHONE,
44		.invert	= 1,
45	},
46};
47
48/* Headphones jack detection GPIO */
49static struct snd_soc_jack_gpio hs_jack_gpio = {
50	.gpio		= GPIO75_HX4700_EARPHONE_nDET,
51	.invert		= true,
52	.name		= "hp-gpio",
53	.report		= SND_JACK_HEADPHONE,
54	.debounce_time	= 200,
55};
56
57/*
58 * iPAQ hx4700 uses I2S for capture and playback.
59 */
60static int hx4700_hw_params(struct snd_pcm_substream *substream,
61			    struct snd_pcm_hw_params *params)
62{
63	struct snd_soc_pcm_runtime *rtd = substream->private_data;
64	struct snd_soc_dai *codec_dai = rtd->codec_dai;
65	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
66	int ret = 0;
67
68	/* set the I2S system clock as output */
69	ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
70			SND_SOC_CLOCK_OUT);
71	if (ret < 0)
72		return ret;
73
74	/* inform codec driver about clock freq *
75	 * (PXA I2S always uses divider 256)    */
76	ret = snd_soc_dai_set_sysclk(codec_dai, 0, 256 * params_rate(params),
77			SND_SOC_CLOCK_IN);
78	if (ret < 0)
79		return ret;
80
81	return 0;
82}
83
84static struct snd_soc_ops hx4700_ops = {
85	.hw_params = hx4700_hw_params,
86};
87
88static int hx4700_spk_power(struct snd_soc_dapm_widget *w,
89			    struct snd_kcontrol *k, int event)
90{
91	gpio_set_value(GPIO107_HX4700_SPK_nSD, !!SND_SOC_DAPM_EVENT_ON(event));
92	return 0;
93}
94
95static int hx4700_hp_power(struct snd_soc_dapm_widget *w,
96			   struct snd_kcontrol *k, int event)
97{
98	gpio_set_value(GPIO92_HX4700_HP_DRIVER, !!SND_SOC_DAPM_EVENT_ON(event));
99	return 0;
100}
101
102/* hx4700 machine dapm widgets */
103static const struct snd_soc_dapm_widget hx4700_dapm_widgets[] = {
104	SND_SOC_DAPM_HP("Headphone Jack", hx4700_hp_power),
105	SND_SOC_DAPM_SPK("Speaker", hx4700_spk_power),
106	SND_SOC_DAPM_MIC("Built-in Microphone", NULL),
107};
108
109/* hx4700 machine audio_map */
110static const struct snd_soc_dapm_route hx4700_audio_map[] = {
111
112	/* Headphone connected to LOUT, ROUT */
113	{"Headphone Jack", NULL, "LOUT"},
114	{"Headphone Jack", NULL, "ROUT"},
115
116	/* Speaker connected to MOUT2 */
117	{"Speaker", NULL, "MOUT2"},
118
119	/* Microphone connected to MICIN */
120	{"MICIN", NULL, "Built-in Microphone"},
121	{"AIN", NULL, "MICOUT"},
122};
123
124/*
125 * Logic for a ak4641 as connected on a HP iPAQ hx4700
126 */
127static int hx4700_ak4641_init(struct snd_soc_pcm_runtime *rtd)
128{
129	int err;
130
131	/* Jack detection API stuff */
132	err = snd_soc_card_jack_new(rtd->card, "Headphone Jack",
133				    SND_JACK_HEADPHONE, &hs_jack, hs_jack_pin,
134				    ARRAY_SIZE(hs_jack_pin));
135	if (err)
136		return err;
137
138	err = snd_soc_jack_add_gpios(&hs_jack, 1, &hs_jack_gpio);
139
140	return err;
141}
142
143static int hx4700_card_remove(struct snd_soc_card *card)
144{
145	snd_soc_jack_free_gpios(&hs_jack, 1, &hs_jack_gpio);
146
147	return 0;
148}
149
150/* hx4700 digital audio interface glue - connects codec <--> CPU */
151static struct snd_soc_dai_link hx4700_dai = {
152	.name = "ak4641",
153	.stream_name = "AK4641",
154	.cpu_dai_name = "pxa2xx-i2s",
155	.codec_dai_name = "ak4641-hifi",
156	.platform_name = "pxa-pcm-audio",
157	.codec_name = "ak4641.0-0012",
158	.init = hx4700_ak4641_init,
159	.dai_fmt = SND_SOC_DAIFMT_MSB | SND_SOC_DAIFMT_NB_NF |
160		   SND_SOC_DAIFMT_CBS_CFS,
161	.ops = &hx4700_ops,
162};
163
164/* hx4700 audio machine driver */
165static struct snd_soc_card snd_soc_card_hx4700 = {
166	.name			= "iPAQ hx4700",
167	.owner			= THIS_MODULE,
168	.remove			= hx4700_card_remove,
169	.dai_link		= &hx4700_dai,
170	.num_links		= 1,
171	.dapm_widgets		= hx4700_dapm_widgets,
172	.num_dapm_widgets	= ARRAY_SIZE(hx4700_dapm_widgets),
173	.dapm_routes		= hx4700_audio_map,
174	.num_dapm_routes	= ARRAY_SIZE(hx4700_audio_map),
175	.fully_routed		= true,
176};
177
178static struct gpio hx4700_audio_gpios[] = {
179	{ GPIO107_HX4700_SPK_nSD, GPIOF_OUT_INIT_HIGH, "SPK_POWER" },
180	{ GPIO92_HX4700_HP_DRIVER, GPIOF_OUT_INIT_LOW, "EP_POWER" },
181};
182
183static int hx4700_audio_probe(struct platform_device *pdev)
184{
185	int ret;
186
187	if (!machine_is_h4700())
188		return -ENODEV;
189
190	ret = gpio_request_array(hx4700_audio_gpios,
191				ARRAY_SIZE(hx4700_audio_gpios));
192	if (ret)
193		return ret;
194
195	snd_soc_card_hx4700.dev = &pdev->dev;
196	ret = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_hx4700);
197	if (ret)
198		gpio_free_array(hx4700_audio_gpios,
199				ARRAY_SIZE(hx4700_audio_gpios));
200
201	return ret;
202}
203
204static int hx4700_audio_remove(struct platform_device *pdev)
205{
206	gpio_set_value(GPIO92_HX4700_HP_DRIVER, 0);
207	gpio_set_value(GPIO107_HX4700_SPK_nSD, 0);
208
209	gpio_free_array(hx4700_audio_gpios, ARRAY_SIZE(hx4700_audio_gpios));
210	return 0;
211}
212
213static struct platform_driver hx4700_audio_driver = {
214	.driver	= {
215		.name = "hx4700-audio",
216		.pm = &snd_soc_pm_ops,
217	},
218	.probe	= hx4700_audio_probe,
219	.remove	= hx4700_audio_remove,
220};
221
222module_platform_driver(hx4700_audio_driver);
223
224MODULE_AUTHOR("Philipp Zabel");
225MODULE_DESCRIPTION("ALSA SoC iPAQ hx4700");
226MODULE_LICENSE("GPL");
227MODULE_ALIAS("platform:hx4700-audio");
228