target/linux/xburst/patches-2.6.36/011-n526-sound.patch

   1 From d2e198ed9ade74e2cb042ade405071ab58b11e33 Mon Sep 17 00:00:00 2001
   2 From: Lars-Peter Clausen <lars@metafoo.de>
   3 Date: Sat, 24 Apr 2010 12:38:41 +0200
   4 Subject: [PATCH] Add N526 sound SoC board driver
   5
   6 ---
   7  sound/soc/jz4740/Kconfig  |    8 ++
   8  sound/soc/jz4740/Makefile |    2 +
   9  sound/soc/jz4740/n526.c   |  169 +++++++++++++++++++++++++++++++++++++++++++++
  10  3 files changed, 179 insertions(+), 0 deletions(-)
  11  create mode 100644 sound/soc/jz4740/n526.c
  12
  13 --- a/sound/soc/jz4740/Kconfig
  14 +++ b/sound/soc/jz4740/Kconfig
  15 @@ -29,3 +29,11 @@ config SND_JZ4740_SOC_N516
  16      select SND_SOC_JZCODEC
  17         help
  18           Say Y if you want to enable support for SoC audio on the Hanvon N516.
  19 +
  20 +config SND_JZ4740_SOC_N526
  21 +       tristate "SoC Audio support for Hanvon N526 eBook reader"
  22 +       depends on SND_JZ4740_SOC && JZ4740_N526
  23 +       select SND_JZ4740_SOC_I2S
  24 +    select SND_SOC_JZCODEC
  25 +       help
  26 +         Say Y if you want to enable support for SoC audio on the Hanvon N526.
  27 --- a/sound/soc/jz4740/Makefile
  28 +++ b/sound/soc/jz4740/Makefile
  29 @@ -10,6 +10,8 @@ obj-$(CONFIG_SND_JZ4740_SOC_I2S) += snd-
  30  # Jz4740 Machine Support
  31  snd-soc-qi-lb60-objs := qi_lb60.o
  32  snd-soc-n516-objs := n516.o
  33 +snd-soc-n526-objs := n526.o
  34
  35  obj-$(CONFIG_SND_JZ4740_SOC_QI_LB60) += snd-soc-qi-lb60.o
  36  obj-$(CONFIG_SND_JZ4740_SOC_N516) += snd-soc-n516.o
  37 +obj-$(CONFIG_SND_JZ4740_SOC_N526) += snd-soc-n526.o
  38 --- /dev/null
  39 +++ b/sound/soc/jz4740/n526.c
  40 @@ -0,0 +1,169 @@
  41 +/*
  42 + * Copyright (C) 2009, Lars-Peter Clausen <lars@metafoo.de>
  43 + *
  44 + * This program is free software; you can redistribute it and/or modify
  45 + * it under the terms of the GNU General Public License version 2 as
  46 + * published by the Free Software Foundation.
  47 + *
  48 + *  You should have received a copy of the  GNU General Public License along
  49 + *  with this program; if not, write  to the Free Software Foundation, Inc.,
  50 + *  675 Mass Ave, Cambridge, MA 02139, USA.
  51 + *
  52 + */
  53 +
  54 +#include <linux/module.h>
  55 +#include <linux/moduleparam.h>
  56 +#include <linux/timer.h>
  57 +#include <linux/interrupt.h>
  58 +#include <linux/platform_device.h>
  59 +#include <sound/core.h>
  60 +#include <sound/pcm.h>
  61 +#include <sound/soc.h>
  62 +#include <sound/soc-dapm.h>
  63 +#include <linux/gpio.h>
  64 +
  65 +#include "../codecs/jzcodec.h"
  66 +#include "jz4740-pcm.h"
  67 +#include "jz4740-i2s.h"
  68 +
  69 +#define N526_AMP_EN_GPIO JZ_GPIO_PORTD(4)
  70 +
  71 +static int n526_spk_event(struct snd_soc_dapm_widget *widget,
  72 +                            struct snd_kcontrol *ctrl, int event)
  73 +{
  74 +       gpio_set_value(N526_AMP_EN_GPIO, !SND_SOC_DAPM_EVENT_OFF(event));
  75 +       return 0;
  76 +}
  77 +
  78 +static const struct snd_soc_dapm_widget n526_widgets[] = {
  79 +       SND_SOC_DAPM_SPK("Speaker", n526_spk_event),
  80 +       SND_SOC_DAPM_HP("Headphone", NULL),
  81 +       SND_SOC_DAPM_MIC("Mic", NULL),
  82 +};
  83 +
  84 +static const struct snd_soc_dapm_route n526_routes[] = {
  85 +       {"Mic", NULL, "MIC"},
  86 +       {"Speaker", NULL, "LOUT"},
  87 +       {"Speaker", NULL, "ROUT"},
  88 +       {"Headphone", NULL, "LOUT"},
  89 +       {"Headphone", NULL, "ROUT"},
  90 +};
  91 +
  92 +static const struct snd_kcontrol_new n526_controls[] = {
  93 +       SOC_DAPM_PIN_SWITCH("Speaker"),
  94 +};
  95 +
  96 +#define N526_DAIFMT (SND_SOC_DAIFMT_I2S | \
  97 +                       SND_SOC_DAIFMT_NB_NF | \
  98 +                       SND_SOC_DAIFMT_CBM_CFM)
  99 +
 100 +static int n526_codec_init(struct snd_soc_codec *codec)
 101 +{
 102 +       int ret;
 103 +       struct snd_soc_dai *cpu_dai = codec->socdev->card->dai_link->cpu_dai;
 104 +       struct snd_soc_dai *codec_dai = codec->socdev->card->dai_link->codec_dai;
 105 +
 106 +       snd_soc_dapm_nc_pin(codec, "LIN");
 107 +       snd_soc_dapm_nc_pin(codec, "RIN");
 108 +
 109 +       ret = snd_soc_dai_set_fmt(codec_dai, N526_DAIFMT);
 110 +       if (ret < 0) {
 111 +               dev_err(codec->dev, "Failed to set codec dai format: %d\n", ret);
 112 +               return ret;
 113 +       }
 114 +
 115 +       ret = snd_soc_dai_set_fmt(cpu_dai, N526_DAIFMT);
 116 +       if (ret < 0) {
 117 +               dev_err(codec->dev, "Failed to set cpu dai format: %d\n", ret);
 118 +               return ret;
 119 +       }
 120 +
 121 +       ret = snd_soc_dai_set_sysclk(codec_dai, JZCODEC_SYSCLK, 111,
 122 +               SND_SOC_CLOCK_IN);
 123 +       if (ret < 0) {
 124 +               dev_err(codec->dev, "Failed to set codec dai sysclk: %d\n", ret);
 125 +               return ret;
 126 +       }
 127 +
 128 +       snd_soc_dapm_new_controls(codec, n526_widgets, ARRAY_SIZE(n526_widgets));
 129 +
 130 +       snd_soc_add_controls(codec, n526_controls,
 131 +                               ARRAY_SIZE(n526_controls));
 132 +
 133 +       snd_soc_dapm_add_routes(codec, n526_routes, ARRAY_SIZE(n526_routes));
 134 +
 135 +       snd_soc_dapm_sync(codec);
 136 +
 137 +       return 0;
 138 +}
 139 +
 140 +static struct snd_soc_dai_link n526_dai = {
 141 +       .name = "jz-codec",
 142 +       .stream_name = "JZCODEC",
 143 +       .cpu_dai = &jz4740_i2s_dai,
 144 +       .codec_dai = &jz_codec_dai,
 145 +       .init = n526_codec_init,
 146 +};
 147 +
 148 +static struct snd_soc_card n526 = {
 149 +       .name = "N526",
 150 +       .dai_link = &n526_dai,
 151 +       .num_links = 1,
 152 +       .platform = &jz4740_soc_platform,
 153 +};
 154 +
 155 +static struct snd_soc_device n526_snd_devdata = {
 156 +       .card = &n526,
 157 +       .codec_dev = &soc_codec_dev_jzcodec,
 158 +};
 159 +
 160 +static struct platform_device *n526_snd_device;
 161 +
 162 +static int __init n526_init(void)
 163 +{
 164 +       int ret;
 165 +
 166 +       n526_snd_device = platform_device_alloc("soc-audio", -1);
 167 +
 168 +       if (!n526_snd_device)
 169 +               return -ENOMEM;
 170 +
 171 +       ret = gpio_request(N526_AMP_EN_GPIO, "AMP");
 172 +       if (ret) {
 173 +               pr_err("n526 snd: Failed to request AMP GPIO(%d): %d\n",
 174 +                               N526_AMP_EN_GPIO, ret);
 175 +               goto err_device_put;
 176 +       }
 177 +
 178 +       gpio_direction_output(JZ_GPIO_PORTD(4), 0);
 179 +
 180 +       platform_set_drvdata(n526_snd_device, &n526_snd_devdata);
 181 +       n526_snd_devdata.dev = &n526_snd_device->dev;
 182 +       ret = platform_device_add(n526_snd_device);
 183 +       if (ret) {
 184 +               pr_err("n526 snd: Failed to add snd soc device: %d\n", ret);
 185 +               goto err_unset_pdata;
 186 +       }
 187 +
 188 +        return 0;
 189 +
 190 +err_unset_pdata:
 191 +       platform_set_drvdata(n526_snd_device, NULL);
 192 +       gpio_free(N526_AMP_EN_GPIO);
 193 +err_device_put:
 194 +       platform_device_put(n526_snd_device);
 195 +
 196 +       return ret;
 197 +}
 198 +module_init(n526_init);
 199 +
 200 +static void __exit n526_exit(void)
 201 +{
 202 +       gpio_free(N526_AMP_EN_GPIO);
 203 +       platform_device_unregister(n526_snd_device);
 204 +}
 205 +module_exit(n526_exit);
 206 +
 207 +MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
 208 +MODULE_DESCRIPTION("ALSA SoC N526 audio support");
 209 +MODULE_LICENSE("GPL v2");