sound/soc/codecs/rk2928_codec.c

   1 /*
   2  * rk2928_codec.c ALSA SoC RK2928 codec driver
   3  *
   4  * Copyright 2012 Rockchip
   5  *
   6  * This program is free software; you can redistribute it and/or
   7  * modify it under the terms of the GNU General Public License
   8  * version 2 as published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful, but
  11  * WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License
  16  * along with this program; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  18  * 02110-1301 USA
  19  *
  20  */
  21
  22 #include <linux/module.h>
  23 #include <linux/moduleparam.h>
  24 #include <linux/init.h>
  25 #include <linux/delay.h>
  26 #include <linux/pm.h>
  27 #include <linux/gpio.h>
  28 #include <linux/platform_device.h>
  29 #include <linux/slab.h>
  30
  31 #include <asm/io.h>
  32
  33 #include <sound/core.h>
  34 #include <sound/pcm.h>
  35 #include <sound/pcm_params.h>
  36 #include <sound/soc.h>
  37 #include <sound/initval.h>
  38 #include <sound/tlv.h>
  39
  40 #include "rk2928_codec.h"
  41
  42 static struct rk2928_codec_data {
  43         struct device   *dev;
  44         struct clk              *hclk;
  45         int                     regbase;
  46         int                             regbase_phy;
  47         int                             regsize_phy;
  48         int     mute;
  49 } rk2928_data;
  50
  51 static const struct snd_soc_dapm_widget rk2928_dapm_widgets[] = {
  52         SND_SOC_DAPM_DAC("DACL", "HIFI Playback", CODEC_REG_POWER, 5, 1),
  53         SND_SOC_DAPM_DAC("DACR", "HIFI Playback", CODEC_REG_POWER, 4, 1),
  54         SND_SOC_DAPM_PGA("DACL Amp", CODEC_REG_DAC_GAIN, 2, 0, NULL, 0),
  55         SND_SOC_DAPM_PGA("DACR Amp", CODEC_REG_DAC_GAIN, 0, 0, NULL, 0),
  56         SND_SOC_DAPM_OUT_DRV("DACL Drv", CODEC_REG_DAC_MUTE, 1, 1, NULL, 0),
  57         SND_SOC_DAPM_OUT_DRV("DACR Drv", CODEC_REG_DAC_MUTE, 0, 1, NULL, 0),
  58         SND_SOC_DAPM_OUTPUT("SPKL"),
  59         SND_SOC_DAPM_OUTPUT("SPKR"),
  60         SND_SOC_DAPM_ADC("ADCL", "HIFI Capture", CODEC_REG_POWER, 3, 1),
  61         SND_SOC_DAPM_ADC("ADCR", "HIFI Capture", CODEC_REG_POWER, 2, 1),
  62         SND_SOC_DAPM_INPUT("MICL"),
  63         SND_SOC_DAPM_INPUT("MICR"),
  64 };
  65
  66 static const struct snd_soc_dapm_route rk2928_audio_map[] = {
  67         {"DACL Drv", "DACL Amp", "DACL"},
  68         {"DACR Drv", "DACR Amp", "DACR"},
  69         {"SPKL", NULL, "DACL Drv"},
  70         {"SPKR", NULL, "DACR Drv"},
  71         {"ADCL", NULL, "MICL"},
  72         {"ADCR", NULL, "MICR"},
  73 };
  74
  75 void codec_set_spk(bool on)
  76 {
  77
  78 }
  79
  80 static unsigned int rk2928_read(struct snd_soc_codec *codec, unsigned int reg)
  81 {
  82         return readl(rk2928_data.regbase + reg);
  83 }
  84
  85 static int rk2928_write(struct snd_soc_codec *codec, unsigned int reg, unsigned int value)
  86 {
  87         DBG("%s reg 0x%02x value 0x%02x", __FUNCTION__, reg, value);
  88         writel(value, rk2928_data.regbase + reg);
  89         return 0;
  90 }
  91
  92 static int rk2928_write_mask(struct snd_soc_codec *codec, unsigned int reg,
  93                                         unsigned int mask, unsigned int value)
  94 {
  95         unsigned int regvalue = rk2928_read(codec, reg);
  96
  97         DBG("%s reg 0x%02x mask 0x%02x value 0x%02x", __FUNCTION__, reg, mask, value);
  98
  99         regvalue &= ~mask;
 100         regvalue |= mask & value;
 101         return rk2928_write(codec, reg, regvalue);
 102 }
 103
 104 static int rk2928_audio_hw_params(struct snd_pcm_substream *substream,
 105                                     struct snd_pcm_hw_params *params,
 106                                     struct snd_soc_dai *dai)
 107 {
 108 //      struct snd_soc_pcm_runtime *rtd = substream->private_data;
 109 //      struct snd_soc_codec *codec = rtd->codec;
 110 //      struct rk2928_codec_data *priv = snd_soc_codec_get_drvdata(codec);
 111
 112         DBG("%s", __FUNCTION__);
 113
 114         return 0;
 115 }
 116
 117 static int rk2928_audio_trigger(struct snd_pcm_substream *substream, int cmd,
 118                                 struct snd_soc_dai *dai)
 119 {
 120 //      struct snd_soc_pcm_runtime *rtd = substream->private_data;
 121 //      struct snd_soc_codec *codec = rtd->codec;
 122 //      struct rk2928_codec_data *priv = snd_soc_codec_get_drvdata(codec);
 123         int err = 0;
 124
 125         DBG("%s cmd 0x%x", __FUNCTION__, cmd);
 126
 127         switch (cmd) {
 128                 case SNDRV_PCM_TRIGGER_START:
 129                 case SNDRV_PCM_TRIGGER_RESUME:
 130                 case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 131                         break;
 132                 case SNDRV_PCM_TRIGGER_STOP:
 133                 case SNDRV_PCM_TRIGGER_SUSPEND:
 134                 case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 135                         break;
 136                 default:
 137                         err = -EINVAL;
 138         }
 139         return err;
 140 }
 141
 142 static int rk2928_audio_startup(struct snd_pcm_substream *substream,
 143                                   struct snd_soc_dai *dai)
 144 {
 145 //      struct snd_soc_pcm_runtime *rtd = substream->private_data;
 146 //      struct snd_soc_codec *codec = rtd->codec;
 147         DBG("%s", __FUNCTION__);
 148         return 0;
 149 }
 150
 151 static int rk2928_set_bias_level(struct snd_soc_codec *codec,
 152                               enum snd_soc_bias_level level)
 153 {
 154         DBG("%s level %d", __FUNCTION__, level);
 155
 156         if(codec == NULL)
 157                 return -1;
 158
 159         switch(level)
 160         {
 161                 case SND_SOC_BIAS_ON:
 162                         break;
 163                 case SND_SOC_BIAS_PREPARE:
 164                         rk2928_write_mask(codec, CODEC_REG_POWER, m_PD_MIC_BIAS | m_PD_CODEC, v_PD_MIC_BIAS(0) | v_PD_CODEC(0));
 165                         break;
 166                 case SND_SOC_BIAS_STANDBY:
 167                 case SND_SOC_BIAS_OFF:
 168                         rk2928_write(codec, CODEC_REG_POWER, v_PWR_OFF);
 169                         break;
 170                 default:
 171                         return -1;
 172         }
 173         codec->dapm.bias_level = level;
 174         return 0;
 175 }
 176
 177 static int rk2928_probe(struct snd_soc_codec *codec)
 178 {
 179         struct platform_device *pdev = to_platform_device(codec->dev);
 180         struct snd_soc_dapm_context *dapm = &codec->dapm;
 181         struct resource *res, *mem;
 182         int ret;
 183
 184         DBG("%s", __FUNCTION__);
 185
 186         snd_soc_codec_set_drvdata(codec, &rk2928_data);
 187
 188         rk2928_data.dev = &pdev->dev;
 189         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
 190         if (!res) {
 191                 dev_err(&pdev->dev, "Unable to get register resource\n");
 192                 ret = -ENXIO;
 193                 goto err0;
 194         }
 195         rk2928_data.regbase_phy = res->start;
 196         rk2928_data.regsize_phy = (res->end - res->start) + 1;
 197         mem = request_mem_region(res->start, (res->end - res->start) + 1, pdev->name);
 198         if (!mem)
 199         {
 200         dev_err(&pdev->dev, "failed to request mem region for rk2928 codec\n");
 201         ret = -ENOENT;
 202         goto err0;
 203         }
 204
 205
 206         rk2928_data.regbase = (int)ioremap(res->start, (res->end - res->start) + 1);
 207         if (!rk2928_data.regbase) {
 208                 dev_err(&pdev->dev, "cannot ioremap acodec registers\n");
 209                 ret = -ENXIO;
 210                 goto err1;
 211         }
 212
 213         rk2928_write(codec, CODEC_REG_DAC_MUTE, v_MUTE_DAC(1));
 214         rk2928_write(codec, CODEC_REG_DAC_GAIN, v_GAIN_DAC(DAC_GAIN_3DB_P));
 215         rk2928_set_bias_level(codec, SND_SOC_BIAS_OFF);
 216
 217         snd_soc_dapm_new_controls(dapm, rk2928_dapm_widgets,
 218                         ARRAY_SIZE(rk2928_dapm_widgets));
 219         snd_soc_dapm_add_routes(dapm, rk2928_audio_map, ARRAY_SIZE(rk2928_audio_map));
 220
 221         return 0;
 222
 223 err1:
 224         release_mem_region(res->start,(res->end - res->start) + 1);
 225 //      clk_disable(rk2928_data.hclk);
 226 err0:
 227         DBG("%s failed", __FUNCTION__);
 228         return ret;
 229 }
 230
 231 static int rk2928_remove(struct snd_soc_codec *codec)
 232 {
 233         return 0;
 234 }
 235
 236 static int rk2928_suspend(struct snd_soc_codec *codec, pm_message_t state)
 237 {
 238         DBG("%s", __FUNCTION__);
 239         rk2928_set_bias_level(codec, SND_SOC_BIAS_OFF);
 240         return 0;
 241 }
 242
 243 static int rk2928_resume(struct snd_soc_codec *codec)
 244 {
 245         DBG("%s", __FUNCTION__);
 246         rk2928_write(codec, CODEC_REG_POWER, v_PD_ADC(1) | v_PD_DAC(1) | v_PD_MIC_BIAS(1));
 247         return 0;
 248 }
 249
 250 static struct snd_soc_codec_driver rk2928_audio_codec_drv = {
 251         .probe = rk2928_probe,
 252         .remove = rk2928_remove,
 253         .suspend = rk2928_suspend,
 254         .resume = rk2928_resume,
 255         .read = rk2928_read,
 256         .write = rk2928_write,
 257         .set_bias_level = rk2928_set_bias_level,
 258 };
 259
 260 static struct snd_soc_dai_ops rk2928_audio_codec_ops = {
 261         .hw_params = rk2928_audio_hw_params,
 262         .trigger = rk2928_audio_trigger,
 263         .startup = rk2928_audio_startup,
 264 };
 265
 266 static struct snd_soc_dai_driver rk2928_codec_dai = {
 267         .name = "rk2928-codec",
 268         .playback = {
 269                 .stream_name = "HIFI Playback",
 270                 .channels_min = 1,
 271                 .channels_max = 2,
 272                 .rates = SNDRV_PCM_RATE_8000_48000,
 273                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |
 274                         SNDRV_PCM_FMTBIT_S24_LE,
 275         },
 276         .capture = {
 277                 .stream_name = "HIFI Capture",
 278                 .channels_min = 1,
 279                 .channels_max = 2,
 280                 .rates = SNDRV_PCM_RATE_8000_48000,
 281                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S18_3LE,
 282         },
 283         .ops = &rk2928_audio_codec_ops,
 284 };
 285
 286 static __devinit int rk2928_codec_probe(struct platform_device *pdev)
 287 {
 288         int r;
 289
 290         DBG("%s", __FUNCTION__);
 291
 292         /* Register ASoC codec DAI */
 293         r = snd_soc_register_codec(&pdev->dev, &rk2928_audio_codec_drv,
 294                                         &rk2928_codec_dai, 1);
 295         if (r) {
 296                 dev_err(&pdev->dev, "can't register ASoC rk2928 audio codec\n");
 297                 return r;
 298         }
 299
 300         DBG("%s success", __FUNCTION__);
 301         return 0;
 302
 303 }
 304
 305 static int __devexit rk2928_codec_remove(struct platform_device *pdev)
 306 {
 307         snd_soc_unregister_codec(&pdev->dev);
 308         return 0;
 309 }
 310
 311 static struct platform_driver rk2928_codec_driver = {
 312         .probe          = rk2928_codec_probe,
 313         .remove         = __devexit_p(rk2928_codec_remove),
 314         .driver         = {
 315                 .name   = "rk2928-codec",
 316                 .owner  = THIS_MODULE,
 317         },
 318 };
 319
 320 static int __init rk2928_codec_init(void)
 321 {
 322         return platform_driver_register(&rk2928_codec_driver);
 323 }
 324 module_init(rk2928_codec_init);
 325
 326 static void __exit rk2928_codec_exit(void)
 327 {
 328         #ifdef CODEC_I2C_MODE
 329         i2c_del_driver(&rk2928_codec_driver);
 330         #else
 331         platform_driver_unregister(&rk2928_codec_driver);
 332         #endif
 333 }
 334 module_exit(rk2928_codec_exit);
 335
 336 MODULE_DESCRIPTION("ASoC RK2928 codec driver");
 337 MODULE_LICENSE("GPL");