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