GNU Linux-libre 4.14.254-gnu1
[releases.git] / sound / soc / pxa / hx4700.c
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 static struct snd_soc_jack hs_jack;
31
32 /* Headphones jack detection DAPM pin */
33 static 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 */
47 static 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  */
58 static 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
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
82 static const struct snd_soc_ops hx4700_ops = {
83         .hw_params = hx4700_hw_params,
84 };
85
86 static 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
93 static 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 */
101 static 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 */
108 static 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  */
125 static int hx4700_ak4641_init(struct snd_soc_pcm_runtime *rtd)
126 {
127         int err;
128
129         /* Jack detection API stuff */
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));
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
141 /* hx4700 digital audio interface glue - connects codec <--> CPU */
142 static struct snd_soc_dai_link hx4700_dai = {
143         .name = "ak4641",
144         .stream_name = "AK4641",
145         .cpu_dai_name = "pxa2xx-i2s",
146         .codec_dai_name = "ak4641-hifi",
147         .platform_name = "pxa-pcm-audio",
148         .codec_name = "ak4641.0-0012",
149         .init = hx4700_ak4641_init,
150         .dai_fmt = SND_SOC_DAIFMT_MSB | SND_SOC_DAIFMT_NB_NF |
151                    SND_SOC_DAIFMT_CBS_CFS,
152         .ops = &hx4700_ops,
153 };
154
155 /* hx4700 audio machine driver */
156 static struct snd_soc_card snd_soc_card_hx4700 = {
157         .name                   = "iPAQ hx4700",
158         .owner                  = THIS_MODULE,
159         .dai_link               = &hx4700_dai,
160         .num_links              = 1,
161         .dapm_widgets           = hx4700_dapm_widgets,
162         .num_dapm_widgets       = ARRAY_SIZE(hx4700_dapm_widgets),
163         .dapm_routes            = hx4700_audio_map,
164         .num_dapm_routes        = ARRAY_SIZE(hx4700_audio_map),
165         .fully_routed           = true,
166 };
167
168 static struct gpio hx4700_audio_gpios[] = {
169         { GPIO107_HX4700_SPK_nSD, GPIOF_OUT_INIT_HIGH, "SPK_POWER" },
170         { GPIO92_HX4700_HP_DRIVER, GPIOF_OUT_INIT_LOW, "EP_POWER" },
171 };
172
173 static int hx4700_audio_probe(struct platform_device *pdev)
174 {
175         int ret;
176
177         if (!machine_is_h4700())
178                 return -ENODEV;
179
180         ret = gpio_request_array(hx4700_audio_gpios,
181                                 ARRAY_SIZE(hx4700_audio_gpios));
182         if (ret)
183                 return ret;
184
185         snd_soc_card_hx4700.dev = &pdev->dev;
186         ret = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_hx4700);
187         if (ret)
188                 gpio_free_array(hx4700_audio_gpios,
189                                 ARRAY_SIZE(hx4700_audio_gpios));
190
191         return ret;
192 }
193
194 static int hx4700_audio_remove(struct platform_device *pdev)
195 {
196         gpio_set_value(GPIO92_HX4700_HP_DRIVER, 0);
197         gpio_set_value(GPIO107_HX4700_SPK_nSD, 0);
198
199         gpio_free_array(hx4700_audio_gpios, ARRAY_SIZE(hx4700_audio_gpios));
200         return 0;
201 }
202
203 static struct platform_driver hx4700_audio_driver = {
204         .driver = {
205                 .name = "hx4700-audio",
206                 .pm = &snd_soc_pm_ops,
207         },
208         .probe  = hx4700_audio_probe,
209         .remove = hx4700_audio_remove,
210 };
211
212 module_platform_driver(hx4700_audio_driver);
213
214 MODULE_AUTHOR("Philipp Zabel");
215 MODULE_DESCRIPTION("ALSA SoC iPAQ hx4700");
216 MODULE_LICENSE("GPL");
217 MODULE_ALIAS("platform:hx4700-audio");