sound/soc/codecs/cq93vc.c

   1 /*
   2  * ALSA SoC CQ0093 Voice Codec Driver for DaVinci platforms
   3  *
   4  * Copyright (C) 2010 Texas Instruments, Inc
   5  *
   6  * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  21  */
  22 #include <linux/module.h>
  23 #include <linux/moduleparam.h>
  24 #include <linux/init.h>
  25 #include <linux/io.h>
  26 #include <linux/delay.h>
  27 #include <linux/pm.h>
  28 #include <linux/platform_device.h>
  29 #include <linux/device.h>
  30 #include <linux/slab.h>
  31 #include <linux/clk.h>
  32 #include <linux/mfd/davinci_voicecodec.h>
  33 #include <linux/spi/spi.h>
  34
  35 #include <sound/core.h>
  36 #include <sound/pcm.h>
  37 #include <sound/pcm_params.h>
  38 #include <sound/soc.h>
  39 #include <sound/initval.h>
  40
  41 static const struct snd_kcontrol_new cq93vc_snd_controls[] = {
  42         SOC_SINGLE("PGA Capture Volume", DAVINCI_VC_REG05, 0, 0x03, 0),
  43         SOC_SINGLE("Mono DAC Playback Volume", DAVINCI_VC_REG09, 0, 0x3f, 0),
  44 };
  45
  46 static int cq93vc_mute(struct snd_soc_dai *dai, int mute)
  47 {
  48         struct snd_soc_codec *codec = dai->codec;
  49         u8 reg;
  50
  51         if (mute)
  52                 reg = DAVINCI_VC_REG09_MUTE;
  53         else
  54                 reg = 0;
  55
  56         snd_soc_update_bits(codec, DAVINCI_VC_REG09, DAVINCI_VC_REG09_MUTE,
  57                             reg);
  58
  59         return 0;
  60 }
  61
  62 static int cq93vc_set_dai_sysclk(struct snd_soc_dai *codec_dai,
  63                                  int clk_id, unsigned int freq, int dir)
  64 {
  65         struct snd_soc_codec *codec = codec_dai->codec;
  66         struct davinci_vc *davinci_vc = codec->dev->platform_data;
  67
  68         switch (freq) {
  69         case 22579200:
  70         case 27000000:
  71         case 33868800:
  72                 davinci_vc->cq93vc.sysclk = freq;
  73                 return 0;
  74         }
  75
  76         return -EINVAL;
  77 }
  78
  79 static int cq93vc_set_bias_level(struct snd_soc_codec *codec,
  80                                 enum snd_soc_bias_level level)
  81 {
  82         switch (level) {
  83         case SND_SOC_BIAS_ON:
  84                 snd_soc_write(codec, DAVINCI_VC_REG12,
  85                              DAVINCI_VC_REG12_POWER_ALL_ON);
  86                 break;
  87         case SND_SOC_BIAS_PREPARE:
  88                 break;
  89         case SND_SOC_BIAS_STANDBY:
  90                 snd_soc_write(codec, DAVINCI_VC_REG12,
  91                              DAVINCI_VC_REG12_POWER_ALL_OFF);
  92                 break;
  93         case SND_SOC_BIAS_OFF:
  94                 /* force all power off */
  95                 snd_soc_write(codec, DAVINCI_VC_REG12,
  96                              DAVINCI_VC_REG12_POWER_ALL_OFF);
  97                 break;
  98         }
  99         codec->dapm.bias_level = level;
 100
 101         return 0;
 102 }
 103
 104 #define CQ93VC_RATES    (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000)
 105 #define CQ93VC_FORMATS  (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
 106
 107 static const struct snd_soc_dai_ops cq93vc_dai_ops = {
 108         .digital_mute   = cq93vc_mute,
 109         .set_sysclk     = cq93vc_set_dai_sysclk,
 110 };
 111
 112 static struct snd_soc_dai_driver cq93vc_dai = {
 113         .name = "cq93vc-hifi",
 114         .playback = {
 115                 .stream_name = "Playback",
 116                 .channels_min = 1,
 117                 .channels_max = 2,
 118                 .rates = CQ93VC_RATES,
 119                 .formats = CQ93VC_FORMATS,},
 120         .capture = {
 121                 .stream_name = "Capture",
 122                 .channels_min = 1,
 123                 .channels_max = 2,
 124                 .rates = CQ93VC_RATES,
 125                 .formats = CQ93VC_FORMATS,},
 126         .ops = &cq93vc_dai_ops,
 127 };
 128
 129 static int cq93vc_resume(struct snd_soc_codec *codec)
 130 {
 131         cq93vc_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 132
 133         return 0;
 134 }
 135
 136 static int cq93vc_probe(struct snd_soc_codec *codec)
 137 {
 138         struct davinci_vc *davinci_vc = codec->dev->platform_data;
 139
 140         davinci_vc->cq93vc.codec = codec;
 141
 142         snd_soc_codec_set_cache_io(codec, davinci_vc->regmap);
 143
 144         /* Off, with power on */
 145         cq93vc_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 146
 147         return 0;
 148 }
 149
 150 static int cq93vc_remove(struct snd_soc_codec *codec)
 151 {
 152         cq93vc_set_bias_level(codec, SND_SOC_BIAS_OFF);
 153
 154         return 0;
 155 }
 156
 157 static struct snd_soc_codec_driver soc_codec_dev_cq93vc = {
 158         .set_bias_level = cq93vc_set_bias_level,
 159         .probe = cq93vc_probe,
 160         .remove = cq93vc_remove,
 161         .resume = cq93vc_resume,
 162         .controls = cq93vc_snd_controls,
 163         .num_controls = ARRAY_SIZE(cq93vc_snd_controls),
 164 };
 165
 166 static int cq93vc_platform_probe(struct platform_device *pdev)
 167 {
 168         return snd_soc_register_codec(&pdev->dev,
 169                         &soc_codec_dev_cq93vc, &cq93vc_dai, 1);
 170 }
 171
 172 static int cq93vc_platform_remove(struct platform_device *pdev)
 173 {
 174         snd_soc_unregister_codec(&pdev->dev);
 175         return 0;
 176 }
 177
 178 static struct platform_driver cq93vc_codec_driver = {
 179         .driver = {
 180                         .name = "cq93vc-codec",
 181                         .owner = THIS_MODULE,
 182         },
 183
 184         .probe = cq93vc_platform_probe,
 185         .remove = cq93vc_platform_remove,
 186 };
 187
 188 module_platform_driver(cq93vc_codec_driver);
 189
 190 MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC CQ0093 Voice Codec Driver");
 191 MODULE_AUTHOR("Miguel Aguilar");
 192 MODULE_LICENSE("GPL");