release/src-rt-6.x.4708/linux/linux-2.6.36/sound/soc/omap/sdp4430.c

   1 /*
   2  * sdp4430.c  --  SoC audio for TI OMAP4430 SDP
   3  *
   4  * Author: Misael Lopez Cruz <x0052729@ti.com>
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  18  * 02110-1301 USA
  19  *
  20  */
  21
  22 #include <linux/clk.h>
  23 #include <linux/platform_device.h>
  24 #include <sound/core.h>
  25 #include <sound/pcm.h>
  26 #include <sound/soc.h>
  27 #include <sound/soc-dapm.h>
  28
  29 #include <asm/mach-types.h>
  30 #include <plat/hardware.h>
  31 #include <plat/mux.h>
  32
  33 #include "mcpdm.h"
  34 #include "omap-mcpdm.h"
  35 #include "omap-pcm.h"
  36 #include "../codecs/twl6040.h"
  37
  38 static int twl6040_power_mode;
  39
  40 static int sdp4430_hw_params(struct snd_pcm_substream *substream,
  41         struct snd_pcm_hw_params *params)
  42 {
  43         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  44         struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
  45         int clk_id, freq;
  46         int ret;
  47
  48         if (twl6040_power_mode) {
  49                 clk_id = TWL6040_SYSCLK_SEL_HPPLL;
  50                 freq = 38400000;
  51         } else {
  52                 clk_id = TWL6040_SYSCLK_SEL_LPPLL;
  53                 freq = 32768;
  54         }
  55
  56         /* set the codec mclk */
  57         ret = snd_soc_dai_set_sysclk(codec_dai, clk_id, freq,
  58                                 SND_SOC_CLOCK_IN);
  59         if (ret) {
  60                 printk(KERN_ERR "can't set codec system clock\n");
  61                 return ret;
  62         }
  63 }
  64
  65 static struct snd_soc_ops sdp4430_ops = {
  66         .hw_params = sdp4430_hw_params,
  67 };
  68
  69 static int sdp4430_get_power_mode(struct snd_kcontrol *kcontrol,
  70         struct snd_ctl_elem_value *ucontrol)
  71 {
  72         ucontrol->value.integer.value[0] = twl6040_power_mode;
  73         return 0;
  74 }
  75
  76 static int sdp4430_set_power_mode(struct snd_kcontrol *kcontrol,
  77         struct snd_ctl_elem_value *ucontrol)
  78 {
  79         if (twl6040_power_mode == ucontrol->value.integer.value[0])
  80                 return 0;
  81
  82         twl6040_power_mode = ucontrol->value.integer.value[0];
  83
  84         return 1;
  85 }
  86
  87 static const char *power_texts[] = {"Low-Power", "High-Performance"};
  88
  89 static const struct soc_enum sdp4430_enum[] = {
  90         SOC_ENUM_SINGLE_EXT(2, power_texts),
  91 };
  92
  93 static const struct snd_kcontrol_new sdp4430_controls[] = {
  94         SOC_ENUM_EXT("TWL6040 Power Mode", sdp4430_enum[0],
  95                 sdp4430_get_power_mode, sdp4430_set_power_mode),
  96 };
  97
  98 /* SDP4430 machine DAPM */
  99 static const struct snd_soc_dapm_widget sdp4430_twl6040_dapm_widgets[] = {
 100         SND_SOC_DAPM_MIC("Ext Mic", NULL),
 101         SND_SOC_DAPM_SPK("Ext Spk", NULL),
 102         SND_SOC_DAPM_MIC("Headset Mic", NULL),
 103         SND_SOC_DAPM_HP("Headset Stereophone", NULL),
 104         SND_SOC_DAPM_SPK("Earphone Spk", NULL),
 105 };
 106
 107 static const struct snd_soc_dapm_route audio_map[] = {
 108         /* External Mics: MAINMIC, SUBMIC with bias*/
 109         {"MAINMIC", NULL, "Main Mic Bias"},
 110         {"SUBMIC", NULL, "Main Mic Bias"},
 111         {"Main Mic Bias", NULL, "Ext Mic"},
 112
 113         /* External Speakers: HFL, HFR */
 114         {"Ext Spk", NULL, "HFL"},
 115         {"Ext Spk", NULL, "HFR"},
 116
 117         /* Headset Mic: HSMIC with bias */
 118         {"HSMIC", NULL, "Headset Mic Bias"},
 119         {"Headset Mic Bias", NULL, "Headset Mic"},
 120
 121         /* Headset Stereophone (Headphone): HSOL, HSOR */
 122         {"Headset Stereophone", NULL, "HSOL"},
 123         {"Headset Stereophone", NULL, "HSOR"},
 124
 125         /* Earphone speaker */
 126         {"Earphone Spk", NULL, "EP"},
 127 };
 128
 129 static int sdp4430_twl6040_init(struct snd_soc_codec *codec)
 130 {
 131         int ret;
 132
 133         /* Add SDP4430 specific controls */
 134         ret = snd_soc_add_controls(codec, sdp4430_controls,
 135                                 ARRAY_SIZE(sdp4430_controls));
 136         if (ret)
 137                 return ret;
 138
 139         /* Add SDP4430 specific widgets */
 140         ret = snd_soc_dapm_new_controls(codec, sdp4430_twl6040_dapm_widgets,
 141                                 ARRAY_SIZE(sdp4430_twl6040_dapm_widgets));
 142         if (ret)
 143                 return ret;
 144
 145         /* Set up SDP4430 specific audio path audio_map */
 146         snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
 147
 148         /* SDP4430 connected pins */
 149         snd_soc_dapm_enable_pin(codec, "Ext Mic");
 150         snd_soc_dapm_enable_pin(codec, "Ext Spk");
 151         snd_soc_dapm_enable_pin(codec, "Headset Mic");
 152         snd_soc_dapm_enable_pin(codec, "Headset Stereophone");
 153
 154         /* TWL6040 not connected pins */
 155         snd_soc_dapm_nc_pin(codec, "AFML");
 156         snd_soc_dapm_nc_pin(codec, "AFMR");
 157
 158         ret = snd_soc_dapm_sync(codec);
 159
 160         return ret;
 161 }
 162
 163 /* Digital audio interface glue - connects codec <--> CPU */
 164 static struct snd_soc_dai_link sdp4430_dai = {
 165         .name = "TWL6040",
 166         .stream_name = "TWL6040",
 167         .cpu_dai = &omap_mcpdm_dai,
 168         .codec_dai = &twl6040_dai,
 169         .init = sdp4430_twl6040_init,
 170         .ops = &sdp4430_ops,
 171 };
 172
 173 /* Audio machine driver */
 174 static struct snd_soc_card snd_soc_sdp4430 = {
 175         .name = "SDP4430",
 176         .platform = &omap_soc_platform,
 177         .dai_link = &sdp4430_dai,
 178         .num_links = 1,
 179 };
 180
 181 /* Audio subsystem */
 182 static struct snd_soc_device sdp4430_snd_devdata = {
 183         .card = &snd_soc_sdp4430,
 184         .codec_dev = &soc_codec_dev_twl6040,
 185 };
 186
 187 static struct platform_device *sdp4430_snd_device;
 188
 189 static int __init sdp4430_soc_init(void)
 190 {
 191         int ret;
 192
 193         if (!machine_is_omap_4430sdp()) {
 194                 pr_debug("Not SDP4430!\n");
 195                 return -ENODEV;
 196         }
 197         printk(KERN_INFO "SDP4430 SoC init\n");
 198
 199         sdp4430_snd_device = platform_device_alloc("soc-audio", -1);
 200         if (!sdp4430_snd_device) {
 201                 printk(KERN_ERR "Platform device allocation failed\n");
 202                 return -ENOMEM;
 203         }
 204
 205         platform_set_drvdata(sdp4430_snd_device, &sdp4430_snd_devdata);
 206         sdp4430_snd_devdata.dev = &sdp4430_snd_device->dev;
 207
 208         ret = platform_device_add(sdp4430_snd_device);
 209         if (ret)
 210                 goto err;
 211
 212         /* Codec starts in HP mode */
 213         twl6040_power_mode = 1;
 214
 215         return 0;
 216
 217 err:
 218         printk(KERN_ERR "Unable to add platform device\n");
 219         platform_device_put(sdp4430_snd_device);
 220         return ret;
 221 }
 222 module_init(sdp4430_soc_init);
 223
 224 static void __exit sdp4430_soc_exit(void)
 225 {
 226         platform_device_unregister(sdp4430_snd_device);
 227 }
 228 module_exit(sdp4430_soc_exit);
 229
 230 MODULE_AUTHOR("Misael Lopez Cruz <x0052729@ti.com>");
 231 MODULE_DESCRIPTION("ALSA SoC SDP4430");
 232 MODULE_LICENSE("GPL");