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   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
  34 #include <sound/core.h>
  35 #include <sound/pcm.h>
  36 #include <sound/pcm_params.h>
  37 #include <sound/soc.h>
  38 #include <sound/soc-dai.h>
  39 #include <sound/soc-dapm.h>
  40 #include <sound/initval.h>
  41
  42 #include <mach/dm365.h>
  43
  44 #include "cq93vc.h"
  45
  46 static inline unsigned int cq93vc_read(struct snd_soc_codec *codec,
  47                                                 unsigned int reg)
  48 {
  49         struct davinci_vc *davinci_vc = codec->control_data;
  50
  51         return readl(davinci_vc->base + reg);
  52 }
  53
  54 static inline int cq93vc_write(struct snd_soc_codec *codec, unsigned int reg,
  55                        unsigned int value)
  56 {
  57         struct davinci_vc *davinci_vc = codec->control_data;
  58
  59         writel(value, davinci_vc->base + reg);
  60
  61         return 0;
  62 }
  63
  64 static const struct snd_kcontrol_new cq93vc_snd_controls[] = {
  65         SOC_SINGLE("PGA Capture Volume", DAVINCI_VC_REG05, 0, 0x03, 0),
  66         SOC_SINGLE("Mono DAC Playback Volume", DAVINCI_VC_REG09, 0, 0x3f, 0),
  67 };
  68
  69 static int cq93vc_mute(struct snd_soc_dai *dai, int mute)
  70 {
  71         struct snd_soc_codec *codec = dai->codec;
  72         u8 reg = cq93vc_read(codec, DAVINCI_VC_REG09) & ~DAVINCI_VC_REG09_MUTE;
  73
  74         if (mute)
  75                 cq93vc_write(codec, DAVINCI_VC_REG09,
  76                              reg | DAVINCI_VC_REG09_MUTE);
  77         else
  78                 cq93vc_write(codec, DAVINCI_VC_REG09, reg);
  79
  80         return 0;
  81 }
  82
  83 static int cq93vc_set_dai_sysclk(struct snd_soc_dai *codec_dai,
  84                                  int clk_id, unsigned int freq, int dir)
  85 {
  86         struct snd_soc_codec *codec = codec_dai->codec;
  87         struct davinci_vc *davinci_vc = codec->control_data;
  88
  89         switch (freq) {
  90         case 22579200:
  91         case 27000000:
  92         case 33868800:
  93                 davinci_vc->cq93vc.sysclk = freq;
  94                 return 0;
  95         }
  96
  97         return -EINVAL;
  98 }
  99
 100 static int cq93vc_set_bias_level(struct snd_soc_codec *codec,
 101                                 enum snd_soc_bias_level level)
 102 {
 103         switch (level) {
 104         case SND_SOC_BIAS_ON:
 105                 cq93vc_write(codec, DAVINCI_VC_REG12,
 106                              DAVINCI_VC_REG12_POWER_ALL_ON);
 107                 break;
 108         case SND_SOC_BIAS_PREPARE:
 109                 break;
 110         case SND_SOC_BIAS_STANDBY:
 111                 cq93vc_write(codec, DAVINCI_VC_REG12,
 112                              DAVINCI_VC_REG12_POWER_ALL_OFF);
 113                 break;
 114         case SND_SOC_BIAS_OFF:
 115                 /* force all power off */
 116                 cq93vc_write(codec, DAVINCI_VC_REG12,
 117                              DAVINCI_VC_REG12_POWER_ALL_OFF);
 118                 break;
 119         }
 120         codec->bias_level = level;
 121
 122         return 0;
 123 }
 124
 125 #define CQ93VC_RATES    (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000)
 126 #define CQ93VC_FORMATS  (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
 127
 128 static struct snd_soc_dai_ops cq93vc_dai_ops = {
 129         .digital_mute   = cq93vc_mute,
 130         .set_sysclk     = cq93vc_set_dai_sysclk,
 131 };
 132
 133 struct snd_soc_dai cq93vc_dai = {
 134         .name = "CQ93VC",
 135         .playback = {
 136                 .stream_name = "Playback",
 137                 .channels_min = 1,
 138                 .channels_max = 2,
 139                 .rates = CQ93VC_RATES,
 140                 .formats = CQ93VC_FORMATS,},
 141         .capture = {
 142                 .stream_name = "Capture",
 143                 .channels_min = 1,
 144                 .channels_max = 2,
 145                 .rates = CQ93VC_RATES,
 146                 .formats = CQ93VC_FORMATS,},
 147         .ops = &cq93vc_dai_ops,
 148 };
 149 EXPORT_SYMBOL_GPL(cq93vc_dai);
 150
 151 static int cq93vc_resume(struct platform_device *pdev)
 152 {
 153         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 154         struct snd_soc_codec *codec = socdev->card->codec;
 155
 156         cq93vc_set_bias_level(codec, codec->suspend_bias_level);
 157
 158         return 0;
 159 }
 160
 161 static struct snd_soc_codec *cq93vc_codec;
 162
 163 static int cq93vc_probe(struct platform_device *pdev)
 164 {
 165         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 166         struct device *dev = &pdev->dev;
 167         struct snd_soc_codec *codec;
 168         int ret;
 169
 170         socdev->card->codec = cq93vc_codec;
 171         codec = socdev->card->codec;
 172
 173         /* Register pcms */
 174         ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
 175         if (ret < 0) {
 176                 dev_err(dev, "%s: failed to create pcms\n", pdev->name);
 177                 return ret;
 178         }
 179
 180         /* Set controls */
 181         snd_soc_add_controls(codec, cq93vc_snd_controls,
 182                              ARRAY_SIZE(cq93vc_snd_controls));
 183
 184         /* Off, with power on */
 185         cq93vc_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
 186
 187         return 0;
 188 }
 189
 190 static int cq93vc_remove(struct platform_device *pdev)
 191 {
 192         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 193
 194         snd_soc_free_pcms(socdev);
 195         snd_soc_dapm_free(socdev);
 196
 197         return 0;
 198 }
 199
 200 struct snd_soc_codec_device soc_codec_dev_cq93vc = {
 201         .probe = cq93vc_probe,
 202         .remove = cq93vc_remove,
 203         .resume = cq93vc_resume,
 204 };
 205 EXPORT_SYMBOL_GPL(soc_codec_dev_cq93vc);
 206
 207 static __init int cq93vc_codec_probe(struct platform_device *pdev)
 208 {
 209         struct davinci_vc *davinci_vc = platform_get_drvdata(pdev);
 210         struct snd_soc_codec *codec;
 211         int ret;
 212
 213         codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
 214         if (codec == NULL) {
 215                 dev_dbg(davinci_vc->dev,
 216                         "could not allocate memory for codec data\n");
 217                 return -ENOMEM;
 218         }
 219
 220         davinci_vc->cq93vc.codec = codec;
 221
 222         cq93vc_dai.dev = &pdev->dev;
 223
 224         mutex_init(&codec->mutex);
 225         INIT_LIST_HEAD(&codec->dapm_widgets);
 226         INIT_LIST_HEAD(&codec->dapm_paths);
 227         codec->dev = &pdev->dev;
 228         codec->name = "CQ93VC";
 229         codec->owner = THIS_MODULE;
 230         codec->read = cq93vc_read;
 231         codec->write = cq93vc_write;
 232         codec->set_bias_level = cq93vc_set_bias_level;
 233         codec->dai = &cq93vc_dai;
 234         codec->num_dai = 1;
 235         codec->control_data = davinci_vc;
 236
 237         cq93vc_codec = codec;
 238
 239         ret = snd_soc_register_codec(codec);
 240         if (ret) {
 241                 dev_err(davinci_vc->dev, "failed to register codec\n");
 242                 goto fail1;
 243         }
 244
 245         ret = snd_soc_register_dai(&cq93vc_dai);
 246         if (ret) {
 247                 dev_err(davinci_vc->dev, "could register dai\n");
 248                 goto fail2;
 249         }
 250         return 0;
 251
 252 fail2:
 253         snd_soc_unregister_codec(codec);
 254
 255 fail1:
 256         kfree(codec);
 257         cq93vc_codec = NULL;
 258
 259         return ret;
 260 }
 261
 262 static int __devexit cq93vc_codec_remove(struct platform_device *pdev)
 263 {
 264         struct snd_soc_device *socdev = platform_get_drvdata(pdev);
 265         struct snd_soc_codec *codec = socdev->card->codec;
 266
 267         snd_soc_unregister_dai(&cq93vc_dai);
 268         snd_soc_unregister_codec(&codec);
 269
 270         kfree(codec);
 271         cq93vc_codec = NULL;
 272
 273         return 0;
 274 }
 275
 276 static struct platform_driver cq93vc_codec_driver = {
 277         .driver = {
 278                    .name = "cq93vc",
 279                    .owner = THIS_MODULE,
 280                    },
 281         .probe = cq93vc_codec_probe,
 282         .remove = __devexit_p(cq93vc_codec_remove),
 283 };
 284
 285 static __init int cq93vc_init(void)
 286 {
 287         return platform_driver_probe(&cq93vc_codec_driver, cq93vc_codec_probe);
 288 }
 289 module_init(cq93vc_init);
 290
 291 static __exit void cq93vc_exit(void)
 292 {
 293         platform_driver_unregister(&cq93vc_codec_driver);
 294 }
 295 module_exit(cq93vc_exit);
 296
 297 MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC CQ0093 Voice Codec Driver");
 298 MODULE_AUTHOR("Miguel Aguilar");
 299 MODULE_LICENSE("GPL");