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 inline unsigned int cq93vc_read(struct snd_soc_codec *codec,
  42                                                 unsigned int reg)
  43 {
  44         struct davinci_vc *davinci_vc = codec->control_data;
  45
  46         return readl(davinci_vc->base + reg);
  47 }
  48
  49 static inline int cq93vc_write(struct snd_soc_codec *codec, unsigned int reg,
  50                        unsigned int value)
  51 {
  52         struct davinci_vc *davinci_vc = codec->control_data;
  53
  54         writel(value, davinci_vc->base + reg);
  55
  56         return 0;
  57 }
  58
  59 static const struct snd_kcontrol_new cq93vc_snd_controls[] = {
  60         SOC_SINGLE("PGA Capture Volume", DAVINCI_VC_REG05, 0, 0x03, 0),
  61         SOC_SINGLE("Mono DAC Playback Volume", DAVINCI_VC_REG09, 0, 0x3f, 0),
  62 };
  63
  64 static int cq93vc_mute(struct snd_soc_dai *dai, int mute)
  65 {
  66         struct snd_soc_codec *codec = dai->codec;
  67         u8 reg;
  68
  69         if (mute)
  70                 reg = DAVINCI_VC_REG09_MUTE;
  71         else
  72                 reg = 0;
  73
  74         snd_soc_update_bits(codec, DAVINCI_VC_REG09, DAVINCI_VC_REG09_MUTE,
  75                             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->dev->platform_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                 snd_soc_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                 snd_soc_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                 snd_soc_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 const 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         /* Off, with power on */
 162         cq93vc_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 163
 164         return 0;
 165 }
 166
 167 static int cq93vc_remove(struct snd_soc_codec *codec)
 168 {
 169         cq93vc_set_bias_level(codec, SND_SOC_BIAS_OFF);
 170
 171         return 0;
 172 }
 173
 174 static struct snd_soc_codec_driver soc_codec_dev_cq93vc = {
 175         .read = cq93vc_read,
 176         .write = cq93vc_write,
 177         .set_bias_level = cq93vc_set_bias_level,
 178         .probe = cq93vc_probe,
 179         .remove = cq93vc_remove,
 180         .resume = cq93vc_resume,
 181         .controls = cq93vc_snd_controls,
 182         .num_controls = ARRAY_SIZE(cq93vc_snd_controls),
 183 };
 184
 185 static int cq93vc_platform_probe(struct platform_device *pdev)
 186 {
 187         return snd_soc_register_codec(&pdev->dev,
 188                         &soc_codec_dev_cq93vc, &cq93vc_dai, 1);
 189 }
 190
 191 static int cq93vc_platform_remove(struct platform_device *pdev)
 192 {
 193         snd_soc_unregister_codec(&pdev->dev);
 194         return 0;
 195 }
 196
 197 static struct platform_driver cq93vc_codec_driver = {
 198         .driver = {
 199                         .name = "cq93vc-codec",
 200                         .owner = THIS_MODULE,
 201         },
 202
 203         .probe = cq93vc_platform_probe,
 204         .remove = cq93vc_platform_remove,
 205 };
 206
 207 module_platform_driver(cq93vc_codec_driver);
 208
 209 MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC CQ0093 Voice Codec Driver");
 210 MODULE_AUTHOR("Miguel Aguilar");
 211 MODULE_LICENSE("GPL");