release/src-rt-6.x.4708/linux/linux-2.6.36/sound/soc/jz4740/qi_lb60.c

   1 /*
   2  * Copyright (C) 2009, Lars-Peter Clausen <lars@metafoo.de>
   3  *
   4  * This program is free software; you can redistribute it and/or modify
   5  * it under the terms of the GNU General Public License version 2 as
   6  * published by the Free Software Foundation.
   7  *
   8  *  You should have received a copy of the  GNU General Public License along
   9  *  with this program; if not, write  to the Free Software Foundation, Inc.,
  10  *  675 Mass Ave, Cambridge, MA 02139, USA.
  11  *
  12  */
  13
  14 #include <linux/module.h>
  15 #include <linux/moduleparam.h>
  16 #include <linux/timer.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/platform_device.h>
  19 #include <sound/core.h>
  20 #include <sound/pcm.h>
  21 #include <sound/soc.h>
  22 #include <sound/soc-dapm.h>
  23 #include <linux/gpio.h>
  24
  25 #include "../codecs/jz4740.h"
  26 #include "jz4740-pcm.h"
  27 #include "jz4740-i2s.h"
  28
  29
  30 #define QI_LB60_SND_GPIO JZ_GPIO_PORTB(29)
  31 #define QI_LB60_AMP_GPIO JZ_GPIO_PORTD(4)
  32
  33 static int qi_lb60_spk_event(struct snd_soc_dapm_widget *widget,
  34                              struct snd_kcontrol *ctrl, int event)
  35 {
  36         int on = 0;
  37         if (event & SND_SOC_DAPM_POST_PMU)
  38                 on = 1;
  39         else if (event & SND_SOC_DAPM_PRE_PMD)
  40                 on = 0;
  41
  42         gpio_set_value(QI_LB60_SND_GPIO, on);
  43         gpio_set_value(QI_LB60_AMP_GPIO, on);
  44
  45         return 0;
  46 }
  47
  48 static const struct snd_soc_dapm_widget qi_lb60_widgets[] = {
  49         SND_SOC_DAPM_SPK("Speaker", qi_lb60_spk_event),
  50         SND_SOC_DAPM_MIC("Mic", NULL),
  51 };
  52
  53 static const struct snd_soc_dapm_route qi_lb60_routes[] = {
  54         {"Mic", NULL, "MIC"},
  55         {"Speaker", NULL, "LOUT"},
  56         {"Speaker", NULL, "ROUT"},
  57 };
  58
  59 #define QI_LB60_DAIFMT (SND_SOC_DAIFMT_I2S | \
  60                         SND_SOC_DAIFMT_NB_NF | \
  61                         SND_SOC_DAIFMT_CBM_CFM)
  62
  63 static int qi_lb60_codec_init(struct snd_soc_codec *codec)
  64 {
  65         int ret;
  66         struct snd_soc_dai *cpu_dai = codec->socdev->card->dai_link->cpu_dai;
  67
  68         snd_soc_dapm_nc_pin(codec, "LIN");
  69         snd_soc_dapm_nc_pin(codec, "RIN");
  70
  71         ret = snd_soc_dai_set_fmt(cpu_dai, QI_LB60_DAIFMT);
  72         if (ret < 0) {
  73                 dev_err(codec->dev, "Failed to set cpu dai format: %d\n", ret);
  74                 return ret;
  75         }
  76
  77         snd_soc_dapm_new_controls(codec, qi_lb60_widgets, ARRAY_SIZE(qi_lb60_widgets));
  78         snd_soc_dapm_add_routes(codec, qi_lb60_routes, ARRAY_SIZE(qi_lb60_routes));
  79         snd_soc_dapm_sync(codec);
  80
  81         return 0;
  82 }
  83
  84 static struct snd_soc_dai_link qi_lb60_dai = {
  85         .name = "jz4740",
  86         .stream_name = "jz4740",
  87         .cpu_dai = &jz4740_i2s_dai,
  88         .codec_dai = &jz4740_codec_dai,
  89         .init = qi_lb60_codec_init,
  90 };
  91
  92 static struct snd_soc_card qi_lb60 = {
  93         .name = "QI LB60",
  94         .dai_link = &qi_lb60_dai,
  95         .num_links = 1,
  96         .platform = &jz4740_soc_platform,
  97 };
  98
  99 static struct snd_soc_device qi_lb60_snd_devdata = {
 100         .card = &qi_lb60,
 101         .codec_dev = &soc_codec_dev_jz4740_codec,
 102 };
 103
 104 static struct platform_device *qi_lb60_snd_device;
 105
 106 static int __init qi_lb60_init(void)
 107 {
 108         int ret;
 109
 110         qi_lb60_snd_device = platform_device_alloc("soc-audio", -1);
 111
 112         if (!qi_lb60_snd_device)
 113                 return -ENOMEM;
 114
 115         ret = gpio_request(QI_LB60_SND_GPIO, "SND");
 116         if (ret) {
 117                 pr_err("qi_lb60 snd: Failed to request SND GPIO(%d): %d\n",
 118                                 QI_LB60_SND_GPIO, ret);
 119                 goto err_device_put;
 120         }
 121
 122         ret = gpio_request(QI_LB60_AMP_GPIO, "AMP");
 123         if (ret) {
 124                 pr_err("qi_lb60 snd: Failed to request AMP GPIO(%d): %d\n",
 125                                 QI_LB60_AMP_GPIO, ret);
 126                 goto err_gpio_free_snd;
 127         }
 128
 129         gpio_direction_output(QI_LB60_SND_GPIO, 0);
 130         gpio_direction_output(QI_LB60_AMP_GPIO, 0);
 131
 132         platform_set_drvdata(qi_lb60_snd_device, &qi_lb60_snd_devdata);
 133         qi_lb60_snd_devdata.dev = &qi_lb60_snd_device->dev;
 134
 135         ret = platform_device_add(qi_lb60_snd_device);
 136         if (ret) {
 137                 pr_err("qi_lb60 snd: Failed to add snd soc device: %d\n", ret);
 138                 goto err_unset_pdata;
 139         }
 140
 141          return 0;
 142
 143 err_unset_pdata:
 144         platform_set_drvdata(qi_lb60_snd_device, NULL);
 145 /*err_gpio_free_amp:*/
 146         gpio_free(QI_LB60_AMP_GPIO);
 147 err_gpio_free_snd:
 148         gpio_free(QI_LB60_SND_GPIO);
 149 err_device_put:
 150         platform_device_put(qi_lb60_snd_device);
 151
 152         return ret;
 153 }
 154 module_init(qi_lb60_init);
 155
 156 static void __exit qi_lb60_exit(void)
 157 {
 158         gpio_free(QI_LB60_AMP_GPIO);
 159         gpio_free(QI_LB60_SND_GPIO);
 160         platform_device_unregister(qi_lb60_snd_device);
 161 }
 162 module_exit(qi_lb60_exit);
 163
 164 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 165 MODULE_DESCRIPTION("ALSA SoC QI LB60 Audio support");
 166 MODULE_LICENSE("GPL v2");