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Linux/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 = !SND_SOC_DAPM_EVENT_OFF(event);
 31 
 32         gpio_set_value(QI_LB60_SND_GPIO, on);
 33         gpio_set_value(QI_LB60_AMP_GPIO, on);
 34 
 35         return 0;
 36 }
 37 
 38 static const struct snd_soc_dapm_widget qi_lb60_widgets[] = {
 39         SND_SOC_DAPM_SPK("Speaker", qi_lb60_spk_event),
 40         SND_SOC_DAPM_MIC("Mic", NULL),
 41 };
 42 
 43 static const struct snd_soc_dapm_route qi_lb60_routes[] = {
 44         {"Mic", NULL, "MIC"},
 45         {"Speaker", NULL, "LOUT"},
 46         {"Speaker", NULL, "ROUT"},
 47 };
 48 
 49 #define QI_LB60_DAIFMT (SND_SOC_DAIFMT_I2S | \
 50                         SND_SOC_DAIFMT_NB_NF | \
 51                         SND_SOC_DAIFMT_CBM_CFM)
 52 
 53 static int qi_lb60_codec_init(struct snd_soc_pcm_runtime *rtd)
 54 {
 55         struct snd_soc_codec *codec = rtd->codec;
 56         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 57         struct snd_soc_dapm_context *dapm = &codec->dapm;
 58         int ret;
 59 
 60         snd_soc_dapm_nc_pin(dapm, "LIN");
 61         snd_soc_dapm_nc_pin(dapm, "RIN");
 62 
 63         ret = snd_soc_dai_set_fmt(cpu_dai, QI_LB60_DAIFMT);
 64         if (ret < 0) {
 65                 dev_err(codec->dev, "Failed to set cpu dai format: %d\n", ret);
 66                 return ret;
 67         }
 68 
 69         return 0;
 70 }
 71 
 72 static struct snd_soc_dai_link qi_lb60_dai = {
 73         .name = "jz4740",
 74         .stream_name = "jz4740",
 75         .cpu_dai_name = "jz4740-i2s",
 76         .platform_name = "jz4740-i2s",
 77         .codec_dai_name = "jz4740-hifi",
 78         .codec_name = "jz4740-codec",
 79         .init = qi_lb60_codec_init,
 80 };
 81 
 82 static struct snd_soc_card qi_lb60 = {
 83         .name = "QI LB60",
 84         .owner = THIS_MODULE,
 85         .dai_link = &qi_lb60_dai,
 86         .num_links = 1,
 87 
 88         .dapm_widgets = qi_lb60_widgets,
 89         .num_dapm_widgets = ARRAY_SIZE(qi_lb60_widgets),
 90         .dapm_routes = qi_lb60_routes,
 91         .num_dapm_routes = ARRAY_SIZE(qi_lb60_routes),
 92 };
 93 
 94 static const struct gpio qi_lb60_gpios[] = {
 95         { QI_LB60_SND_GPIO, GPIOF_OUT_INIT_LOW, "SND" },
 96         { QI_LB60_AMP_GPIO, GPIOF_OUT_INIT_LOW, "AMP" },
 97 };
 98 
 99 static int qi_lb60_probe(struct platform_device *pdev)
100 {
101         struct snd_soc_card *card = &qi_lb60;
102         int ret;
103 
104         ret = gpio_request_array(qi_lb60_gpios, ARRAY_SIZE(qi_lb60_gpios));
105         if (ret)
106                 return ret;
107 
108         card->dev = &pdev->dev;
109 
110         ret = snd_soc_register_card(card);
111         if (ret) {
112                 dev_err(&pdev->dev, "snd_soc_register_card() failed: %d\n",
113                         ret);
114                 gpio_free_array(qi_lb60_gpios, ARRAY_SIZE(qi_lb60_gpios));
115         }
116         return ret;
117 }
118 
119 static int qi_lb60_remove(struct platform_device *pdev)
120 {
121         struct snd_soc_card *card = platform_get_drvdata(pdev);
122 
123         snd_soc_unregister_card(card);
124         gpio_free_array(qi_lb60_gpios, ARRAY_SIZE(qi_lb60_gpios));
125         return 0;
126 }
127 
128 static struct platform_driver qi_lb60_driver = {
129         .driver         = {
130                 .name   = "qi-lb60-audio",
131                 .owner  = THIS_MODULE,
132         },
133         .probe          = qi_lb60_probe,
134         .remove         = qi_lb60_remove,
135 };
136 
137 module_platform_driver(qi_lb60_driver);
138 
139 MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
140 MODULE_DESCRIPTION("ALSA SoC QI LB60 Audio support");
141 MODULE_LICENSE("GPL v2");
142 MODULE_ALIAS("platform:qi-lb60-audio");
143 

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