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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
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30static struct snd_soc_jack hs_jack;
31
32/* Headphones jack detection DAPM pin */
33static struct snd_soc_jack_pin hs_jack_pin[] = {
34 {
35 .pin = "Headphone Jack",
36 .mask = SND_JACK_HEADPHONE,
37 },
38 {
39 .pin = "Speaker",
40 /* disable speaker when hp jack is inserted */
41 .mask = SND_JACK_HEADPHONE,
42 .invert = 1,
43 },
44};
45
46/* Headphones jack detection GPIO */
47static struct snd_soc_jack_gpio hs_jack_gpio = {
48 .gpio = GPIO75_HX4700_EARPHONE_nDET,
49 .invert = true,
50 .name = "hp-gpio",
51 .report = SND_JACK_HEADPHONE,
52 .debounce_time = 200,
53};
54
55/*
56 * iPAQ hx4700 uses I2S for capture and playback.
57 */
58static int hx4700_hw_params(struct snd_pcm_substream *substream,
59 struct snd_pcm_hw_params *params)
60{
61 struct snd_soc_pcm_runtime *rtd = substream->private_data;
62 struct snd_soc_dai *codec_dai = rtd->codec_dai;
63 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
64 int ret = 0;
65
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66 /* set the I2S system clock as output */
67 ret = snd_soc_dai_set_sysclk(cpu_dai, PXA2XX_I2S_SYSCLK, 0,
68 SND_SOC_CLOCK_OUT);
69 if (ret < 0)
70 return ret;
71
72 /* inform codec driver about clock freq *
73 * (PXA I2S always uses divider 256) */
74 ret = snd_soc_dai_set_sysclk(codec_dai, 0, 256 * params_rate(params),
75 SND_SOC_CLOCK_IN);
76 if (ret < 0)
77 return ret;
78
79 return 0;
80}
81
82static struct snd_soc_ops hx4700_ops = {
83 .hw_params = hx4700_hw_params,
84};
85
86static int hx4700_spk_power(struct snd_soc_dapm_widget *w,
87 struct snd_kcontrol *k, int event)
88{
89 gpio_set_value(GPIO107_HX4700_SPK_nSD, !!SND_SOC_DAPM_EVENT_ON(event));
90 return 0;
91}
92
93static int hx4700_hp_power(struct snd_soc_dapm_widget *w,
94 struct snd_kcontrol *k, int event)
95{
96 gpio_set_value(GPIO92_HX4700_HP_DRIVER, !!SND_SOC_DAPM_EVENT_ON(event));
97 return 0;
98}
99
100/* hx4700 machine dapm widgets */
101static const struct snd_soc_dapm_widget hx4700_dapm_widgets[] = {
102 SND_SOC_DAPM_HP("Headphone Jack", hx4700_hp_power),
103 SND_SOC_DAPM_SPK("Speaker", hx4700_spk_power),
104 SND_SOC_DAPM_MIC("Built-in Microphone", NULL),
105};
106
107/* hx4700 machine audio_map */
108static const struct snd_soc_dapm_route hx4700_audio_map[] = {
109
110 /* Headphone connected to LOUT, ROUT */
111 {"Headphone Jack", NULL, "LOUT"},
112 {"Headphone Jack", NULL, "ROUT"},
113
114 /* Speaker connected to MOUT2 */
115 {"Speaker", NULL, "MOUT2"},
116
117 /* Microphone connected to MICIN */
118 {"MICIN", NULL, "Built-in Microphone"},
119 {"AIN", NULL, "MICOUT"},
120};
121
122/*
123 * Logic for a ak4641 as connected on a HP iPAQ hx4700
124 */
125static int hx4700_ak4641_init(struct snd_soc_pcm_runtime *rtd)
126{
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127 int err;
128
c26f642e 129 /* Jack detection API stuff */
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130 err = snd_soc_card_jack_new(rtd->card, "Headphone Jack",
131 SND_JACK_HEADPHONE, &hs_jack, hs_jack_pin,
132 ARRAY_SIZE(hs_jack_pin));
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133 if (err)
134 return err;
135
136 err = snd_soc_jack_add_gpios(&hs_jack, 1, &hs_jack_gpio);
137
138 return err;
139}
140
16088cb6 141static int hx4700_card_remove(struct snd_soc_card *card)
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142{
143 snd_soc_jack_free_gpios(&hs_jack, 1, &hs_jack_gpio);
144
145 return 0;
146}
147
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148/* hx4700 digital audio interface glue - connects codec <--> CPU */
149static struct snd_soc_dai_link hx4700_dai = {
150 .name = "ak4641",
151 .stream_name = "AK4641",
152 .cpu_dai_name = "pxa2xx-i2s",
153 .codec_dai_name = "ak4641-hifi",
154 .platform_name = "pxa-pcm-audio",
155 .codec_name = "ak4641.0-0012",
156 .init = hx4700_ak4641_init,
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157 .dai_fmt = SND_SOC_DAIFMT_MSB | SND_SOC_DAIFMT_NB_NF |
158 SND_SOC_DAIFMT_CBS_CFS,
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159 .ops = &hx4700_ops,
160};
161
162/* hx4700 audio machine driver */
163static struct snd_soc_card snd_soc_card_hx4700 = {
164 .name = "iPAQ hx4700",
561c6a17 165 .owner = THIS_MODULE,
e1d4d3c8 166 .remove = hx4700_card_remove,
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167 .dai_link = &hx4700_dai,
168 .num_links = 1,
169 .dapm_widgets = hx4700_dapm_widgets,
170 .num_dapm_widgets = ARRAY_SIZE(hx4700_dapm_widgets),
171 .dapm_routes = hx4700_audio_map,
172 .num_dapm_routes = ARRAY_SIZE(hx4700_audio_map),
c529d0a4 173 .fully_routed = true,
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174};
175
176static struct gpio hx4700_audio_gpios[] = {
177 { GPIO107_HX4700_SPK_nSD, GPIOF_OUT_INIT_HIGH, "SPK_POWER" },
178 { GPIO92_HX4700_HP_DRIVER, GPIOF_OUT_INIT_LOW, "EP_POWER" },
179};
180
d7f1be84 181static int hx4700_audio_probe(struct platform_device *pdev)
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182{
183 int ret;
184
185 if (!machine_is_h4700())
186 return -ENODEV;
187
188 ret = gpio_request_array(hx4700_audio_gpios,
189 ARRAY_SIZE(hx4700_audio_gpios));
190 if (ret)
191 return ret;
192
193 snd_soc_card_hx4700.dev = &pdev->dev;
2fd7076a 194 ret = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_hx4700);
c26f642e 195 if (ret)
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196 gpio_free_array(hx4700_audio_gpios,
197 ARRAY_SIZE(hx4700_audio_gpios));
c26f642e 198
497d4965 199 return ret;
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200}
201
d7f1be84 202static int hx4700_audio_remove(struct platform_device *pdev)
c26f642e 203{
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204 gpio_set_value(GPIO92_HX4700_HP_DRIVER, 0);
205 gpio_set_value(GPIO107_HX4700_SPK_nSD, 0);
206
207 gpio_free_array(hx4700_audio_gpios, ARRAY_SIZE(hx4700_audio_gpios));
208 return 0;
209}
210
211static struct platform_driver hx4700_audio_driver = {
212 .driver = {
213 .name = "hx4700-audio",
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214 .pm = &snd_soc_pm_ops,
215 },
216 .probe = hx4700_audio_probe,
d7f1be84 217 .remove = hx4700_audio_remove,
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218};
219
2f702a19 220module_platform_driver(hx4700_audio_driver);
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221
222MODULE_AUTHOR("Philipp Zabel");
223MODULE_DESCRIPTION("ALSA SoC iPAQ hx4700");
224MODULE_LICENSE("GPL");
225MODULE_ALIAS("platform:hx4700-audio");