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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 #include "../codecs/ak4641.h"
 31 
 32 static struct snd_soc_jack hs_jack;
 33 
 34 /* Headphones jack detection DAPM pin */
 35 static 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 */
 49 static 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  */
 60 static 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 
 84 static struct snd_soc_ops hx4700_ops = {
 85         .hw_params = hx4700_hw_params,
 86 };
 87 
 88 static 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 
 95 static 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 */
103 static 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 */
110 static 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  */
127 static int hx4700_ak4641_init(struct snd_soc_pcm_runtime *rtd)
128 {
129         struct snd_soc_codec *codec = rtd->codec;
130         struct snd_soc_dapm_context *dapm = &codec->dapm;
131         int err;
132 
133         /* NC codec pins */
134         /* FIXME: is anything connected here? */
135         snd_soc_dapm_nc_pin(dapm, "MOUT1");
136         snd_soc_dapm_nc_pin(dapm, "MICEXT");
137         snd_soc_dapm_nc_pin(dapm, "AUX");
138 
139         /* Jack detection API stuff */
140         err = snd_soc_jack_new(codec, "Headphone Jack",
141                                 SND_JACK_HEADPHONE, &hs_jack);
142         if (err)
143                 return err;
144 
145         err = snd_soc_jack_add_pins(&hs_jack, ARRAY_SIZE(hs_jack_pin),
146                                         hs_jack_pin);
147         if (err)
148                 return err;
149 
150         err = snd_soc_jack_add_gpios(&hs_jack, 1, &hs_jack_gpio);
151 
152         return err;
153 }
154 
155 static int hx4700_card_remove(struct snd_soc_card *card)
156 {
157         snd_soc_jack_free_gpios(&hs_jack, 1, &hs_jack_gpio);
158 
159         return 0;
160 }
161 
162 /* hx4700 digital audio interface glue - connects codec <--> CPU */
163 static struct snd_soc_dai_link hx4700_dai = {
164         .name = "ak4641",
165         .stream_name = "AK4641",
166         .cpu_dai_name = "pxa2xx-i2s",
167         .codec_dai_name = "ak4641-hifi",
168         .platform_name = "pxa-pcm-audio",
169         .codec_name = "ak4641.0-0012",
170         .init = hx4700_ak4641_init,
171         .dai_fmt = SND_SOC_DAIFMT_MSB | SND_SOC_DAIFMT_NB_NF |
172                    SND_SOC_DAIFMT_CBS_CFS,
173         .ops = &hx4700_ops,
174 };
175 
176 /* hx4700 audio machine driver */
177 static struct snd_soc_card snd_soc_card_hx4700 = {
178         .name                   = "iPAQ hx4700",
179         .owner                  = THIS_MODULE,
180         .remove                 = hx4700_card_remove,
181         .dai_link               = &hx4700_dai,
182         .num_links              = 1,
183         .dapm_widgets           = hx4700_dapm_widgets,
184         .num_dapm_widgets       = ARRAY_SIZE(hx4700_dapm_widgets),
185         .dapm_routes            = hx4700_audio_map,
186         .num_dapm_routes        = ARRAY_SIZE(hx4700_audio_map),
187 };
188 
189 static struct gpio hx4700_audio_gpios[] = {
190         { GPIO107_HX4700_SPK_nSD, GPIOF_OUT_INIT_HIGH, "SPK_POWER" },
191         { GPIO92_HX4700_HP_DRIVER, GPIOF_OUT_INIT_LOW, "EP_POWER" },
192 };
193 
194 static int hx4700_audio_probe(struct platform_device *pdev)
195 {
196         int ret;
197 
198         if (!machine_is_h4700())
199                 return -ENODEV;
200 
201         ret = gpio_request_array(hx4700_audio_gpios,
202                                 ARRAY_SIZE(hx4700_audio_gpios));
203         if (ret)
204                 return ret;
205 
206         snd_soc_card_hx4700.dev = &pdev->dev;
207         ret = snd_soc_register_card(&snd_soc_card_hx4700);
208         if (ret)
209                 gpio_free_array(hx4700_audio_gpios,
210                                 ARRAY_SIZE(hx4700_audio_gpios));
211 
212         return ret;
213 }
214 
215 static int hx4700_audio_remove(struct platform_device *pdev)
216 {
217         snd_soc_unregister_card(&snd_soc_card_hx4700);
218 
219         gpio_set_value(GPIO92_HX4700_HP_DRIVER, 0);
220         gpio_set_value(GPIO107_HX4700_SPK_nSD, 0);
221 
222         gpio_free_array(hx4700_audio_gpios, ARRAY_SIZE(hx4700_audio_gpios));
223         return 0;
224 }
225 
226 static struct platform_driver hx4700_audio_driver = {
227         .driver = {
228                 .name = "hx4700-audio",
229                 .owner = THIS_MODULE,
230                 .pm = &snd_soc_pm_ops,
231         },
232         .probe  = hx4700_audio_probe,
233         .remove = hx4700_audio_remove,
234 };
235 
236 module_platform_driver(hx4700_audio_driver);
237 
238 MODULE_AUTHOR("Philipp Zabel");
239 MODULE_DESCRIPTION("ALSA SoC iPAQ hx4700");
240 MODULE_LICENSE("GPL");
241 MODULE_ALIAS("platform:hx4700-audio");
242 

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