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 <linux/gpio.h>
  23
  24 #define QI_LB60_SND_GPIO JZ_GPIO_PORTB(29)
  25 #define QI_LB60_AMP_GPIO JZ_GPIO_PORTD(4)
  26
  27 static int qi_lb60_spk_event(struct snd_soc_dapm_widget *widget,
  28                              struct snd_kcontrol *ctrl, int event)
  29 {
  30         int on = 0;
  31         if (event & SND_SOC_DAPM_POST_PMU)
  32                 on = 1;
  33         else if (event & SND_SOC_DAPM_PRE_PMD)
  34                 on = 0;
  35
  36         gpio_set_value(QI_LB60_SND_GPIO, on);
  37         gpio_set_value(QI_LB60_AMP_GPIO, on);
  38
  39         return 0;
  40 }
  41
  42 static const struct snd_soc_dapm_widget qi_lb60_widgets[] = {
  43         SND_SOC_DAPM_SPK("Speaker", qi_lb60_spk_event),
  44         SND_SOC_DAPM_MIC("Mic", NULL),
  45 };
  46
  47 static const struct snd_soc_dapm_route qi_lb60_routes[] = {
  48         {"Mic", NULL, "MIC"},
  49         {"Speaker", NULL, "LOUT"},
  50         {"Speaker", NULL, "ROUT"},
  51 };
  52
  53 #define QI_LB60_DAIFMT (SND_SOC_DAIFMT_I2S | \
  54                         SND_SOC_DAIFMT_NB_NF | \
  55                         SND_SOC_DAIFMT_CBM_CFM)
  56
  57 static int qi_lb60_codec_init(struct snd_soc_pcm_runtime *rtd)
  58 {
  59         struct snd_soc_codec *codec = rtd->codec;
  60         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  61         struct snd_soc_dapm_context *dapm = &codec->dapm;
  62         int ret;
  63
  64         snd_soc_dapm_nc_pin(dapm, "LIN");
  65         snd_soc_dapm_nc_pin(dapm, "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(dapm, qi_lb60_widgets,
  74                                   ARRAY_SIZE(qi_lb60_widgets));
  75         snd_soc_dapm_add_routes(dapm, qi_lb60_routes,
  76                                 ARRAY_SIZE(qi_lb60_routes));
  77         snd_soc_dapm_sync(dapm);
  78
  79         return 0;
  80 }
  81
  82 static struct snd_soc_dai_link qi_lb60_dai = {
  83         .name = "jz4740",
  84         .stream_name = "jz4740",
  85         .cpu_dai_name = "jz4740-i2s",
  86         .platform_name = "jz4740-pcm-audio",
  87         .codec_dai_name = "jz4740-hifi",
  88         .codec_name = "jz4740-codec",
  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 };
  97
  98 static struct platform_device *qi_lb60_snd_device;
  99
 100 static int __init qi_lb60_init(void)
 101 {
 102         int ret;
 103
 104         qi_lb60_snd_device = platform_device_alloc("soc-audio", -1);
 105
 106         if (!qi_lb60_snd_device)
 107                 return -ENOMEM;
 108
 109         ret = gpio_request(QI_LB60_SND_GPIO, "SND");
 110         if (ret) {
 111                 pr_err("qi_lb60 snd: Failed to request SND GPIO(%d): %d\n",
 112                                 QI_LB60_SND_GPIO, ret);
 113                 goto err_device_put;
 114         }
 115
 116         ret = gpio_request(QI_LB60_AMP_GPIO, "AMP");
 117         if (ret) {
 118                 pr_err("qi_lb60 snd: Failed to request AMP GPIO(%d): %d\n",
 119                                 QI_LB60_AMP_GPIO, ret);
 120                 goto err_gpio_free_snd;
 121         }
 122
 123         gpio_direction_output(QI_LB60_SND_GPIO, 0);
 124         gpio_direction_output(QI_LB60_AMP_GPIO, 0);
 125
 126         platform_set_drvdata(qi_lb60_snd_device, &qi_lb60);
 127
 128         ret = platform_device_add(qi_lb60_snd_device);
 129         if (ret) {
 130                 pr_err("qi_lb60 snd: Failed to add snd soc device: %d\n", ret);
 131                 goto err_unset_pdata;
 132         }
 133
 134          return 0;
 135
 136 err_unset_pdata:
 137         platform_set_drvdata(qi_lb60_snd_device, NULL);
 138 /*err_gpio_free_amp:*/
 139         gpio_free(QI_LB60_AMP_GPIO);
 140 err_gpio_free_snd:
 141         gpio_free(QI_LB60_SND_GPIO);
 142 err_device_put:
 143         platform_device_put(qi_lb60_snd_device);
 144
 145         return ret;
 146 }
 147 module_init(qi_lb60_init);
 148
 149 static void __exit qi_lb60_exit(void)
 150 {
 151         gpio_free(QI_LB60_AMP_GPIO);
 152         gpio_free(QI_LB60_SND_GPIO);
 153         platform_device_unregister(qi_lb60_snd_device);
 154 }
 155 module_exit(qi_lb60_exit);
 156
 157 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 158 MODULE_DESCRIPTION("ALSA SoC QI LB60 Audio support");
 159 MODULE_LICENSE("GPL v2");