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Linux/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 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 static int hx4700_card_remove(struct snd_soc_card *card)
142 {
143         snd_soc_jack_free_gpios(&hs_jack, 1, &hs_jack_gpio);
144 
145         return 0;
146 }
147 
148 /* hx4700 digital audio interface glue - connects codec <--> CPU */
149 static 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,
157         .dai_fmt = SND_SOC_DAIFMT_MSB | SND_SOC_DAIFMT_NB_NF |
158                    SND_SOC_DAIFMT_CBS_CFS,
159         .ops = &hx4700_ops,
160 };
161 
162 /* hx4700 audio machine driver */
163 static struct snd_soc_card snd_soc_card_hx4700 = {
164         .name                   = "iPAQ hx4700",
165         .owner                  = THIS_MODULE,
166         .remove                 = hx4700_card_remove,
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),
173         .fully_routed           = true,
174 };
175 
176 static 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 
181 static int hx4700_audio_probe(struct platform_device *pdev)
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;
194         ret = devm_snd_soc_register_card(&pdev->dev, &snd_soc_card_hx4700);
195         if (ret)
196                 gpio_free_array(hx4700_audio_gpios,
197                                 ARRAY_SIZE(hx4700_audio_gpios));
198 
199         return ret;
200 }
201 
202 static int hx4700_audio_remove(struct platform_device *pdev)
203 {
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 
211 static struct platform_driver hx4700_audio_driver = {
212         .driver = {
213                 .name = "hx4700-audio",
214                 .pm = &snd_soc_pm_ops,
215         },
216         .probe  = hx4700_audio_probe,
217         .remove = hx4700_audio_remove,
218 };
219 
220 module_platform_driver(hx4700_audio_driver);
221 
222 MODULE_AUTHOR("Philipp Zabel");
223 MODULE_DESCRIPTION("ALSA SoC iPAQ hx4700");
224 MODULE_LICENSE("GPL");
225 MODULE_ALIAS("platform:hx4700-audio");
226 

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