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 #define QI_LB60_SND_GPIO JZ_GPIO_PORTB(29)
  26 #define QI_LB60_AMP_GPIO JZ_GPIO_PORTD(4)
  27
  28 static int qi_lb60_spk_event(struct snd_soc_dapm_widget *widget,
  29                              struct snd_kcontrol *ctrl, int event)
  30 {
  31         int on = 0;
  32         if (event & SND_SOC_DAPM_POST_PMU)
  33                 on = 1;
  34         else if (event & SND_SOC_DAPM_PRE_PMD)
  35                 on = 0;
  36
  37         gpio_set_value(QI_LB60_SND_GPIO, on);
  38         gpio_set_value(QI_LB60_AMP_GPIO, on);
  39
  40         return 0;
  41 }
  42
  43 static const struct snd_soc_dapm_widget qi_lb60_widgets[] = {
  44         SND_SOC_DAPM_SPK("Speaker", qi_lb60_spk_event),
  45         SND_SOC_DAPM_MIC("Mic", NULL),
  46 };
  47
  48 static const struct snd_soc_dapm_route qi_lb60_routes[] = {
  49         {"Mic", NULL, "MIC"},
  50         {"Speaker", NULL, "LOUT"},
  51         {"Speaker", NULL, "ROUT"},
  52 };
  53
  54 #define QI_LB60_DAIFMT (SND_SOC_DAIFMT_I2S | \
  55                         SND_SOC_DAIFMT_NB_NF | \
  56                         SND_SOC_DAIFMT_CBM_CFM)
  57
  58 static int qi_lb60_codec_init(struct snd_soc_pcm_runtime *rtd)
  59 {
  60         struct snd_soc_codec *codec = rtd->codec;
  61         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  62         int ret;
  63
  64         snd_soc_dapm_nc_pin(codec, "LIN");
  65         snd_soc_dapm_nc_pin(codec, "RIN");
  66
  67         ret = snd_soc_dai_set_fmt(cpu_dai, QI_LB60_DAIFMT);
  68         if (ret < 0) {
  69                 dev_err(codec->dev, "Failed to set cpu dai format: %d\n", ret);
  70                 return ret;
  71         }
  72
  73         snd_soc_dapm_new_controls(codec, qi_lb60_widgets, ARRAY_SIZE(qi_lb60_widgets));
  74         snd_soc_dapm_add_routes(codec, qi_lb60_routes, ARRAY_SIZE(qi_lb60_routes));
  75         snd_soc_dapm_sync(codec);
  76
  77         return 0;
  78 }
  79
  80 static struct snd_soc_dai_link qi_lb60_dai = {
  81         .name = "jz4740",
  82         .stream_name = "jz4740",
  83         .cpu_dai_name = "jz4740-i2s",
  84         .platform_name = "jz4740-pcm-audio",
  85         .codec_dai_name = "jz4740-hifi",
  86         .codec_name = "jz4740-codec",
  87         .init = qi_lb60_codec_init,
  88 };
  89
  90 static struct snd_soc_card qi_lb60 = {
  91         .name = "QI LB60",
  92         .dai_link = &qi_lb60_dai,
  93         .num_links = 1,
  94 };
  95
  96 static struct platform_device *qi_lb60_snd_device;
  97
  98 static int __init qi_lb60_init(void)
  99 {
 100         int ret;
 101
 102         qi_lb60_snd_device = platform_device_alloc("soc-audio", -1);
 103
 104         if (!qi_lb60_snd_device)
 105                 return -ENOMEM;
 106
 107         ret = gpio_request(QI_LB60_SND_GPIO, "SND");
 108         if (ret) {
 109                 pr_err("qi_lb60 snd: Failed to request SND GPIO(%d): %d\n",
 110                                 QI_LB60_SND_GPIO, ret);
 111                 goto err_device_put;
 112         }
 113
 114         ret = gpio_request(QI_LB60_AMP_GPIO, "AMP");
 115         if (ret) {
 116                 pr_err("qi_lb60 snd: Failed to request AMP GPIO(%d): %d\n",
 117                                 QI_LB60_AMP_GPIO, ret);
 118                 goto err_gpio_free_snd;
 119         }
 120
 121         gpio_direction_output(QI_LB60_SND_GPIO, 0);
 122         gpio_direction_output(QI_LB60_AMP_GPIO, 0);
 123
 124         platform_set_drvdata(qi_lb60_snd_device, &qi_lb60);
 125
 126         ret = platform_device_add(qi_lb60_snd_device);
 127         if (ret) {
 128                 pr_err("qi_lb60 snd: Failed to add snd soc device: %d\n", ret);
 129                 goto err_unset_pdata;
 130         }
 131
 132          return 0;
 133
 134 err_unset_pdata:
 135         platform_set_drvdata(qi_lb60_snd_device, NULL);
 136 /*err_gpio_free_amp:*/
 137         gpio_free(QI_LB60_AMP_GPIO);
 138 err_gpio_free_snd:
 139         gpio_free(QI_LB60_SND_GPIO);
 140 err_device_put:
 141         platform_device_put(qi_lb60_snd_device);
 142
 143         return ret;
 144 }
 145 module_init(qi_lb60_init);
 146
 147 static void __exit qi_lb60_exit(void)
 148 {
 149         gpio_free(QI_LB60_AMP_GPIO);
 150         gpio_free(QI_LB60_SND_GPIO);
 151         platform_device_unregister(qi_lb60_snd_device);
 152 }
 153 module_exit(qi_lb60_exit);
 154
 155 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 156 MODULE_DESCRIPTION("ALSA SoC QI LB60 Audio support");
 157 MODULE_LICENSE("GPL v2");