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 #include <mach/dm365.h>
  42
  43 static inline unsigned int cq93vc_read(struct snd_soc_codec *codec,
  44                                                 unsigned int reg)
  45 {
  46         struct davinci_vc *davinci_vc = codec->control_data;
  47
  48         return readl(davinci_vc->base + reg);
  49 }
  50
  51 static inline int cq93vc_write(struct snd_soc_codec *codec, unsigned int reg,
  52                        unsigned int value)
  53 {
  54         struct davinci_vc *davinci_vc = codec->control_data;
  55
  56         writel(value, davinci_vc->base + reg);
  57
  58         return 0;
  59 }
  60
  61 static const struct snd_kcontrol_new cq93vc_snd_controls[] = {
  62         SOC_SINGLE("PGA Capture Volume", DAVINCI_VC_REG05, 0, 0x03, 0),
  63         SOC_SINGLE("Mono DAC Playback Volume", DAVINCI_VC_REG09, 0, 0x3f, 0),
  64 };
  65
  66 static int cq93vc_mute(struct snd_soc_dai *dai, int mute)
  67 {
  68         struct snd_soc_codec *codec = dai->codec;
  69         u8 reg = cq93vc_read(codec, DAVINCI_VC_REG09) & ~DAVINCI_VC_REG09_MUTE;
  70
  71         if (mute)
  72                 cq93vc_write(codec, DAVINCI_VC_REG09,
  73                              reg | DAVINCI_VC_REG09_MUTE);
  74         else
  75                 cq93vc_write(codec, DAVINCI_VC_REG09, reg);
  76
  77         return 0;
  78 }
  79
  80 static int cq93vc_set_dai_sysclk(struct snd_soc_dai *codec_dai,
  81                                  int clk_id, unsigned int freq, int dir)
  82 {
  83         struct snd_soc_codec *codec = codec_dai->codec;
  84         struct davinci_vc *davinci_vc = codec->control_data;
  85
  86         switch (freq) {
  87         case 22579200:
  88         case 27000000:
  89         case 33868800:
  90                 davinci_vc->cq93vc.sysclk = freq;
  91                 return 0;
  92         }
  93
  94         return -EINVAL;
  95 }
  96
  97 static int cq93vc_set_bias_level(struct snd_soc_codec *codec,
  98                                 enum snd_soc_bias_level level)
  99 {
 100         switch (level) {
 101         case SND_SOC_BIAS_ON:
 102                 cq93vc_write(codec, DAVINCI_VC_REG12,
 103                              DAVINCI_VC_REG12_POWER_ALL_ON);
 104                 break;
 105         case SND_SOC_BIAS_PREPARE:
 106                 break;
 107         case SND_SOC_BIAS_STANDBY:
 108                 cq93vc_write(codec, DAVINCI_VC_REG12,
 109                              DAVINCI_VC_REG12_POWER_ALL_OFF);
 110                 break;
 111         case SND_SOC_BIAS_OFF:
 112                 /* force all power off */
 113                 cq93vc_write(codec, DAVINCI_VC_REG12,
 114                              DAVINCI_VC_REG12_POWER_ALL_OFF);
 115                 break;
 116         }
 117         codec->dapm.bias_level = level;
 118
 119         return 0;
 120 }
 121
 122 #define CQ93VC_RATES    (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000)
 123 #define CQ93VC_FORMATS  (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
 124
 125 static struct snd_soc_dai_ops cq93vc_dai_ops = {
 126         .digital_mute   = cq93vc_mute,
 127         .set_sysclk     = cq93vc_set_dai_sysclk,
 128 };
 129
 130 static struct snd_soc_dai_driver cq93vc_dai = {
 131         .name = "cq93vc-hifi",
 132         .playback = {
 133                 .stream_name = "Playback",
 134                 .channels_min = 1,
 135                 .channels_max = 2,
 136                 .rates = CQ93VC_RATES,
 137                 .formats = CQ93VC_FORMATS,},
 138         .capture = {
 139                 .stream_name = "Capture",
 140                 .channels_min = 1,
 141                 .channels_max = 2,
 142                 .rates = CQ93VC_RATES,
 143                 .formats = CQ93VC_FORMATS,},
 144         .ops = &cq93vc_dai_ops,
 145 };
 146
 147 static int cq93vc_resume(struct snd_soc_codec *codec)
 148 {
 149         cq93vc_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 150
 151         return 0;
 152 }
 153
 154 static int cq93vc_probe(struct snd_soc_codec *codec)
 155 {
 156         struct davinci_vc *davinci_vc = codec->dev->platform_data;
 157
 158         davinci_vc->cq93vc.codec = codec;
 159         codec->control_data = davinci_vc;
 160
 161         /* Set controls */
 162         snd_soc_add_controls(codec, cq93vc_snd_controls,
 163                              ARRAY_SIZE(cq93vc_snd_controls));
 164
 165         /* Off, with power on */
 166         cq93vc_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 167
 168         return 0;
 169 }
 170
 171 static int cq93vc_remove(struct snd_soc_codec *codec)
 172 {
 173         cq93vc_set_bias_level(codec, SND_SOC_BIAS_OFF);
 174
 175         return 0;
 176 }
 177
 178 static struct snd_soc_codec_driver soc_codec_dev_cq93vc = {
 179         .read = cq93vc_read,
 180         .write = cq93vc_write,
 181         .set_bias_level = cq93vc_set_bias_level,
 182         .probe = cq93vc_probe,
 183         .remove = cq93vc_remove,
 184         .resume = cq93vc_resume,
 185 };
 186
 187 static int cq93vc_platform_probe(struct platform_device *pdev)
 188 {
 189         return snd_soc_register_codec(&pdev->dev,
 190                         &soc_codec_dev_cq93vc, &cq93vc_dai, 1);
 191 }
 192
 193 static int cq93vc_platform_remove(struct platform_device *pdev)
 194 {
 195         snd_soc_unregister_codec(&pdev->dev);
 196         return 0;
 197 }
 198
 199 static struct platform_driver cq93vc_codec_driver = {
 200         .driver = {
 201                         .name = "cq93vc-codec",
 202                         .owner = THIS_MODULE,
 203         },
 204
 205         .probe = cq93vc_platform_probe,
 206         .remove = __devexit_p(cq93vc_platform_remove),
 207 };
 208
 209 static int __init cq93vc_init(void)
 210 {
 211         return platform_driver_register(&cq93vc_codec_driver);
 212 }
 213 module_init(cq93vc_init);
 214
 215 static void __exit cq93vc_exit(void)
 216 {
 217         platform_driver_unregister(&cq93vc_codec_driver);
 218 }
 219 module_exit(cq93vc_exit);
 220
 221 MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC CQ0093 Voice Codec Driver");
 222 MODULE_AUTHOR("Miguel Aguilar");
 223 MODULE_LICENSE("GPL");