sound/soc/blackfin/bf6xx-i2s.c

   1 /*
   2  * bf6xx-i2s.c - Analog Devices BF6XX i2s interface driver
   3  *
   4  * Copyright (c) 2012 Analog Devices Inc.
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  13  * GNU 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., 675 Mass Ave, Cambridge, MA 02139, USA.
  18  */
  19
  20 #include <linux/device.h>
  21 #include <linux/init.h>
  22 #include <linux/module.h>
  23 #include <linux/platform_device.h>
  24 #include <sound/pcm.h>
  25 #include <sound/pcm_params.h>
  26 #include <sound/soc.h>
  27 #include <sound/soc-dai.h>
  28
  29 #include "bf6xx-sport.h"
  30
  31 struct sport_params param;
  32
  33 static int bfin_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
  34                 unsigned int fmt)
  35 {
  36         struct sport_device *sport = snd_soc_dai_get_drvdata(cpu_dai);
  37         struct device *dev = &sport->pdev->dev;
  38         int ret = 0;
  39
  40         param.spctl &= ~(SPORT_CTL_OPMODE | SPORT_CTL_CKRE | SPORT_CTL_FSR
  41                         | SPORT_CTL_LFS | SPORT_CTL_LAFS);
  42         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
  43         case SND_SOC_DAIFMT_I2S:
  44                 param.spctl |= SPORT_CTL_OPMODE | SPORT_CTL_CKRE
  45                         | SPORT_CTL_LFS;
  46                 break;
  47         case SND_SOC_DAIFMT_DSP_A:
  48                 param.spctl |= SPORT_CTL_FSR;
  49                 break;
  50         case SND_SOC_DAIFMT_LEFT_J:
  51                 param.spctl |= SPORT_CTL_OPMODE | SPORT_CTL_LFS
  52                         | SPORT_CTL_LAFS;
  53                 break;
  54         default:
  55                 dev_err(dev, "%s: Unknown DAI format type\n", __func__);
  56                 ret = -EINVAL;
  57                 break;
  58         }
  59
  60         param.spctl &= ~(SPORT_CTL_ICLK | SPORT_CTL_IFS);
  61         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
  62         case SND_SOC_DAIFMT_CBM_CFM:
  63                 break;
  64         case SND_SOC_DAIFMT_CBS_CFS:
  65         case SND_SOC_DAIFMT_CBM_CFS:
  66         case SND_SOC_DAIFMT_CBS_CFM:
  67                 ret = -EINVAL;
  68                 break;
  69         default:
  70                 dev_err(dev, "%s: Unknown DAI master type\n", __func__);
  71                 ret = -EINVAL;
  72                 break;
  73         }
  74
  75         return ret;
  76 }
  77
  78 static int bfin_i2s_hw_params(struct snd_pcm_substream *substream,
  79                                 struct snd_pcm_hw_params *params,
  80                                 struct snd_soc_dai *dai)
  81 {
  82         struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
  83         struct device *dev = &sport->pdev->dev;
  84         int ret = 0;
  85
  86         param.spctl &= ~SPORT_CTL_SLEN;
  87         switch (params_format(params)) {
  88         case SNDRV_PCM_FORMAT_S8:
  89                 param.spctl |= 0x70;
  90                 sport->wdsize = 1;
  91                 break;
  92         case SNDRV_PCM_FORMAT_S16_LE:
  93                 param.spctl |= 0xf0;
  94                 sport->wdsize = 2;
  95                 break;
  96         case SNDRV_PCM_FORMAT_S24_LE:
  97                 param.spctl |= 0x170;
  98                 sport->wdsize = 3;
  99                 break;
 100         case SNDRV_PCM_FORMAT_S32_LE:
 101                 param.spctl |= 0x1f0;
 102                 sport->wdsize = 4;
 103                 break;
 104         }
 105
 106         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 107                 ret = sport_set_tx_params(sport, &param);
 108                 if (ret) {
 109                         dev_err(dev, "SPORT tx is busy!\n");
 110                         return ret;
 111                 }
 112         } else {
 113                 ret = sport_set_rx_params(sport, &param);
 114                 if (ret) {
 115                         dev_err(dev, "SPORT rx is busy!\n");
 116                         return ret;
 117                 }
 118         }
 119         return 0;
 120 }
 121
 122 #ifdef CONFIG_PM
 123 static int bfin_i2s_suspend(struct snd_soc_dai *dai)
 124 {
 125         struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
 126
 127         if (dai->capture_active)
 128                 sport_rx_stop(sport);
 129         if (dai->playback_active)
 130                 sport_tx_stop(sport);
 131         return 0;
 132 }
 133
 134 static int bfin_i2s_resume(struct snd_soc_dai *dai)
 135 {
 136         struct sport_device *sport = snd_soc_dai_get_drvdata(dai);
 137         struct device *dev = &sport->pdev->dev;
 138         int ret;
 139
 140         ret = sport_set_tx_params(sport, &param);
 141         if (ret) {
 142                 dev_err(dev, "SPORT tx is busy!\n");
 143                 return ret;
 144         }
 145         ret = sport_set_rx_params(sport, &param);
 146         if (ret) {
 147                 dev_err(dev, "SPORT rx is busy!\n");
 148                 return ret;
 149         }
 150
 151         return 0;
 152 }
 153
 154 #else
 155 #define bfin_i2s_suspend NULL
 156 #define bfin_i2s_resume NULL
 157 #endif
 158
 159 #define BFIN_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 160                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
 161                 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
 162                 SNDRV_PCM_RATE_96000)
 163
 164 #define BFIN_I2S_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \
 165                 SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
 166
 167 static struct snd_soc_dai_ops bfin_i2s_dai_ops = {
 168         .hw_params      = bfin_i2s_hw_params,
 169         .set_fmt        = bfin_i2s_set_dai_fmt,
 170 };
 171
 172 static struct snd_soc_dai_driver bfin_i2s_dai = {
 173         .suspend = bfin_i2s_suspend,
 174         .resume = bfin_i2s_resume,
 175         .playback = {
 176                 .channels_min = 1,
 177                 .channels_max = 2,
 178                 .rates = BFIN_I2S_RATES,
 179                 .formats = BFIN_I2S_FORMATS,
 180         },
 181         .capture = {
 182                 .channels_min = 1,
 183                 .channels_max = 2,
 184                 .rates = BFIN_I2S_RATES,
 185                 .formats = BFIN_I2S_FORMATS,
 186         },
 187         .ops = &bfin_i2s_dai_ops,
 188 };
 189
 190 static const struct snd_soc_component_driver bfin_i2s_component = {
 191         .name           = "bfin-i2s",
 192 };
 193
 194 static int bfin_i2s_probe(struct platform_device *pdev)
 195 {
 196         struct sport_device *sport;
 197         struct device *dev = &pdev->dev;
 198         int ret;
 199
 200         sport = sport_create(pdev);
 201         if (!sport)
 202                 return -ENODEV;
 203
 204         /* register with the ASoC layers */
 205         ret = snd_soc_register_component(dev, &bfin_i2s_component,
 206                                          &bfin_i2s_dai, 1);
 207         if (ret) {
 208                 dev_err(dev, "Failed to register DAI: %d\n", ret);
 209                 sport_delete(sport);
 210                 return ret;
 211         }
 212         platform_set_drvdata(pdev, sport);
 213
 214         return 0;
 215 }
 216
 217 static int bfin_i2s_remove(struct platform_device *pdev)
 218 {
 219         struct sport_device *sport = platform_get_drvdata(pdev);
 220
 221         snd_soc_unregister_component(&pdev->dev);
 222         sport_delete(sport);
 223
 224         return 0;
 225 }
 226
 227 static struct platform_driver bfin_i2s_driver = {
 228         .probe  = bfin_i2s_probe,
 229         .remove = bfin_i2s_remove,
 230         .driver = {
 231                 .name = "bfin-i2s",
 232         },
 233 };
 234
 235 module_platform_driver(bfin_i2s_driver);
 236
 237 MODULE_DESCRIPTION("Analog Devices BF6XX i2s interface driver");
 238 MODULE_AUTHOR("Scott Jiang <Scott.Jiang.Linux@gmail.com>");
 239 MODULE_LICENSE("GPL v2");