sound/soc/blackfin/bf5xx-i2s.c

   1 /*
   2  * File:         sound/soc/blackfin/bf5xx-i2s.c
   3  * Author:       Cliff Cai <Cliff.Cai@analog.com>
   4  *
   5  * Created:      Tue June 06 2008
   6  * Description:  Blackfin I2S CPU DAI driver
   7  *
   8  * Modified:
   9  *               Copyright 2008 Analog Devices Inc.
  10  *
  11  * Bugs:         Enter bugs at http://blackfin.uclinux.org/
  12  *
  13  * This program is free software; you can redistribute it and/or modify
  14  * it under the terms of the GNU General Public License as published by
  15  * the Free Software Foundation; either version 2 of the License, or
  16  * (at your option) any later version.
  17  *
  18  * This program is distributed in the hope that it will be useful,
  19  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  20  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  21  * GNU General Public License for more details.
  22  *
  23  * You should have received a copy of the GNU General Public License
  24  * along with this program; if not, see the file COPYING, or write
  25  * to the Free Software Foundation, Inc.,
  26  * 51 Franklin St, Fifth Floor, Boston, MA  02110-1301  USA
  27  */
  28
  29 #include <linux/init.h>
  30 #include <linux/module.h>
  31 #include <linux/device.h>
  32 #include <linux/delay.h>
  33 #include <sound/core.h>
  34 #include <sound/pcm.h>
  35 #include <sound/pcm_params.h>
  36 #include <sound/initval.h>
  37 #include <sound/soc.h>
  38
  39 #include <asm/irq.h>
  40 #include <asm/portmux.h>
  41 #include <linux/mutex.h>
  42 #include <linux/gpio.h>
  43
  44 #include "bf5xx-sport.h"
  45 #include "bf5xx-i2s-pcm.h"
  46
  47 struct bf5xx_i2s_port {
  48         u16 tcr1;
  49         u16 rcr1;
  50         u16 tcr2;
  51         u16 rcr2;
  52         int configured;
  53
  54         unsigned int slots;
  55         unsigned int tx_mask;
  56         unsigned int rx_mask;
  57
  58         struct bf5xx_i2s_pcm_data tx_dma_data;
  59         struct bf5xx_i2s_pcm_data rx_dma_data;
  60 };
  61
  62 static int bf5xx_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
  63                 unsigned int fmt)
  64 {
  65         struct sport_device *sport_handle = snd_soc_dai_get_drvdata(cpu_dai);
  66         struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
  67         int ret = 0;
  68
  69         /* interface format:support I2S,slave mode */
  70         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
  71         case SND_SOC_DAIFMT_I2S:
  72                 bf5xx_i2s->tcr1 |= TFSR | TCKFE;
  73                 bf5xx_i2s->rcr1 |= RFSR | RCKFE;
  74                 bf5xx_i2s->tcr2 |= TSFSE;
  75                 bf5xx_i2s->rcr2 |= RSFSE;
  76                 break;
  77         case SND_SOC_DAIFMT_DSP_A:
  78                 bf5xx_i2s->tcr1 |= TFSR;
  79                 bf5xx_i2s->rcr1 |= RFSR;
  80                 break;
  81         case SND_SOC_DAIFMT_LEFT_J:
  82                 ret = -EINVAL;
  83                 break;
  84         default:
  85                 dev_err(cpu_dai->dev, "%s: Unknown DAI format type\n",
  86                         __func__);
  87                 ret = -EINVAL;
  88                 break;
  89         }
  90
  91         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
  92         case SND_SOC_DAIFMT_CBM_CFM:
  93                 break;
  94         case SND_SOC_DAIFMT_CBS_CFS:
  95         case SND_SOC_DAIFMT_CBM_CFS:
  96         case SND_SOC_DAIFMT_CBS_CFM:
  97                 ret = -EINVAL;
  98                 break;
  99         default:
 100                 dev_err(cpu_dai->dev, "%s: Unknown DAI master type\n",
 101                         __func__);
 102                 ret = -EINVAL;
 103                 break;
 104         }
 105
 106         return ret;
 107 }
 108
 109 static int bf5xx_i2s_hw_params(struct snd_pcm_substream *substream,
 110                                 struct snd_pcm_hw_params *params,
 111                                 struct snd_soc_dai *dai)
 112 {
 113         struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
 114         struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
 115         int ret = 0;
 116
 117         bf5xx_i2s->tcr2 &= ~0x1f;
 118         bf5xx_i2s->rcr2 &= ~0x1f;
 119         switch (params_format(params)) {
 120         case SNDRV_PCM_FORMAT_S8:
 121                 bf5xx_i2s->tcr2 |= 7;
 122                 bf5xx_i2s->rcr2 |= 7;
 123                 sport_handle->wdsize = 1;
 124                 break;
 125         case SNDRV_PCM_FORMAT_S16_LE:
 126                 bf5xx_i2s->tcr2 |= 15;
 127                 bf5xx_i2s->rcr2 |= 15;
 128                 sport_handle->wdsize = 2;
 129                 break;
 130         case SNDRV_PCM_FORMAT_S24_LE:
 131                 bf5xx_i2s->tcr2 |= 23;
 132                 bf5xx_i2s->rcr2 |= 23;
 133                 sport_handle->wdsize = 3;
 134                 break;
 135         case SNDRV_PCM_FORMAT_S32_LE:
 136                 bf5xx_i2s->tcr2 |= 31;
 137                 bf5xx_i2s->rcr2 |= 31;
 138                 sport_handle->wdsize = 4;
 139                 break;
 140         }
 141
 142         if (!bf5xx_i2s->configured) {
 143                 /*
 144                  * TX and RX are not independent,they are enabled at the
 145                  * same time, even if only one side is running. So, we
 146                  * need to configure both of them at the time when the first
 147                  * stream is opened.
 148                  *
 149                  * CPU DAI:slave mode.
 150                  */
 151                 bf5xx_i2s->configured = 1;
 152                 ret = sport_config_rx(sport_handle, bf5xx_i2s->rcr1,
 153                                       bf5xx_i2s->rcr2, 0, 0);
 154                 if (ret) {
 155                         dev_err(dai->dev, "SPORT is busy!\n");
 156                         return -EBUSY;
 157                 }
 158
 159                 ret = sport_config_tx(sport_handle, bf5xx_i2s->tcr1,
 160                                       bf5xx_i2s->tcr2, 0, 0);
 161                 if (ret) {
 162                         dev_err(dai->dev, "SPORT is busy!\n");
 163                         return -EBUSY;
 164                 }
 165         }
 166
 167         return 0;
 168 }
 169
 170 static void bf5xx_i2s_shutdown(struct snd_pcm_substream *substream,
 171                                struct snd_soc_dai *dai)
 172 {
 173         struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
 174         struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
 175
 176         dev_dbg(dai->dev, "%s enter\n", __func__);
 177         /* No active stream, SPORT is allowed to be configured again. */
 178         if (!dai->active)
 179                 bf5xx_i2s->configured = 0;
 180 }
 181
 182 static int bf5xx_i2s_set_channel_map(struct snd_soc_dai *dai,
 183                 unsigned int tx_num, unsigned int *tx_slot,
 184                 unsigned int rx_num, unsigned int *rx_slot)
 185 {
 186         struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
 187         struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
 188         unsigned int tx_mapped = 0, rx_mapped = 0;
 189         unsigned int slot;
 190         int i;
 191
 192         if ((tx_num > BFIN_TDM_DAI_MAX_SLOTS) ||
 193                         (rx_num > BFIN_TDM_DAI_MAX_SLOTS))
 194                 return -EINVAL;
 195
 196         for (i = 0; i < tx_num; i++) {
 197                 slot = tx_slot[i];
 198                 if ((slot < BFIN_TDM_DAI_MAX_SLOTS) &&
 199                                 (!(tx_mapped & (1 << slot)))) {
 200                         bf5xx_i2s->tx_dma_data.map[i] = slot;
 201                         tx_mapped |= 1 << slot;
 202                 } else
 203                         return -EINVAL;
 204         }
 205         for (i = 0; i < rx_num; i++) {
 206                 slot = rx_slot[i];
 207                 if ((slot < BFIN_TDM_DAI_MAX_SLOTS) &&
 208                                 (!(rx_mapped & (1 << slot)))) {
 209                         bf5xx_i2s->rx_dma_data.map[i] = slot;
 210                         rx_mapped |= 1 << slot;
 211                 } else
 212                         return -EINVAL;
 213         }
 214
 215         return 0;
 216 }
 217
 218 static int bf5xx_i2s_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
 219         unsigned int rx_mask, int slots, int width)
 220 {
 221         struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
 222         struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
 223
 224         if (slots % 8 != 0 || slots > 8)
 225                 return -EINVAL;
 226
 227         if (width != 32)
 228                 return -EINVAL;
 229
 230         bf5xx_i2s->slots = slots;
 231         bf5xx_i2s->tx_mask = tx_mask;
 232         bf5xx_i2s->rx_mask = rx_mask;
 233
 234         bf5xx_i2s->tx_dma_data.tdm_mode = slots != 0;
 235         bf5xx_i2s->rx_dma_data.tdm_mode = slots != 0;
 236
 237         return sport_set_multichannel(sport_handle, slots, tx_mask, rx_mask, 0);
 238 }
 239
 240 #ifdef CONFIG_PM
 241 static int bf5xx_i2s_suspend(struct snd_soc_dai *dai)
 242 {
 243         struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
 244
 245         dev_dbg(dai->dev, "%s : sport %d\n", __func__, dai->id);
 246
 247         if (dai->capture_active)
 248                 sport_rx_stop(sport_handle);
 249         if (dai->playback_active)
 250                 sport_tx_stop(sport_handle);
 251         return 0;
 252 }
 253
 254 static int bf5xx_i2s_resume(struct snd_soc_dai *dai)
 255 {
 256         struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
 257         struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
 258         int ret;
 259
 260         dev_dbg(dai->dev, "%s : sport %d\n", __func__, dai->id);
 261
 262         ret = sport_config_rx(sport_handle, bf5xx_i2s->rcr1,
 263                                       bf5xx_i2s->rcr2, 0, 0);
 264         if (ret) {
 265                 dev_err(dai->dev, "SPORT is busy!\n");
 266                 return -EBUSY;
 267         }
 268
 269         ret = sport_config_tx(sport_handle, bf5xx_i2s->tcr1,
 270                                       bf5xx_i2s->tcr2, 0, 0);
 271         if (ret) {
 272                 dev_err(dai->dev, "SPORT is busy!\n");
 273                 return -EBUSY;
 274         }
 275
 276         return sport_set_multichannel(sport_handle, bf5xx_i2s->slots,
 277                         bf5xx_i2s->tx_mask, bf5xx_i2s->rx_mask, 0);
 278 }
 279
 280 #else
 281 #define bf5xx_i2s_suspend       NULL
 282 #define bf5xx_i2s_resume        NULL
 283 #endif
 284
 285 static int bf5xx_i2s_dai_probe(struct snd_soc_dai *dai)
 286 {
 287         struct sport_device *sport_handle = snd_soc_dai_get_drvdata(dai);
 288         struct bf5xx_i2s_port *bf5xx_i2s = sport_handle->private_data;
 289         unsigned int i;
 290
 291         for (i = 0; i < BFIN_TDM_DAI_MAX_SLOTS; i++) {
 292                 bf5xx_i2s->tx_dma_data.map[i] = i;
 293                 bf5xx_i2s->rx_dma_data.map[i] = i;
 294         }
 295
 296         dai->playback_dma_data = &bf5xx_i2s->tx_dma_data;
 297         dai->capture_dma_data = &bf5xx_i2s->rx_dma_data;
 298
 299         return 0;
 300 }
 301
 302 #define BF5XX_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 303                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
 304                 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
 305                 SNDRV_PCM_RATE_96000)
 306
 307 #define BF5XX_I2S_FORMATS \
 308         (SNDRV_PCM_FMTBIT_S8 | \
 309          SNDRV_PCM_FMTBIT_S16_LE | \
 310          SNDRV_PCM_FMTBIT_S24_LE | \
 311          SNDRV_PCM_FMTBIT_S32_LE)
 312
 313 static const struct snd_soc_dai_ops bf5xx_i2s_dai_ops = {
 314         .shutdown        = bf5xx_i2s_shutdown,
 315         .hw_params       = bf5xx_i2s_hw_params,
 316         .set_fmt         = bf5xx_i2s_set_dai_fmt,
 317         .set_tdm_slot    = bf5xx_i2s_set_tdm_slot,
 318         .set_channel_map = bf5xx_i2s_set_channel_map,
 319 };
 320
 321 static struct snd_soc_dai_driver bf5xx_i2s_dai = {
 322         .probe = bf5xx_i2s_dai_probe,
 323         .suspend = bf5xx_i2s_suspend,
 324         .resume = bf5xx_i2s_resume,
 325         .playback = {
 326                 .channels_min = 2,
 327                 .channels_max = 8,
 328                 .rates = BF5XX_I2S_RATES,
 329                 .formats = BF5XX_I2S_FORMATS,},
 330         .capture = {
 331                 .channels_min = 2,
 332                 .channels_max = 8,
 333                 .rates = BF5XX_I2S_RATES,
 334                 .formats = BF5XX_I2S_FORMATS,},
 335         .ops = &bf5xx_i2s_dai_ops,
 336 };
 337
 338 static const struct snd_soc_component_driver bf5xx_i2s_component = {
 339         .name           = "bf5xx-i2s",
 340 };
 341
 342 static int bf5xx_i2s_probe(struct platform_device *pdev)
 343 {
 344         struct sport_device *sport_handle;
 345         int ret;
 346
 347         /* configure SPORT for I2S */
 348         sport_handle = sport_init(pdev, 4, 8 * sizeof(u32),
 349                 sizeof(struct bf5xx_i2s_port));
 350         if (!sport_handle)
 351                 return -ENODEV;
 352
 353         /* register with the ASoC layers */
 354         ret = snd_soc_register_component(&pdev->dev, &bf5xx_i2s_component,
 355                                          &bf5xx_i2s_dai, 1);
 356         if (ret) {
 357                 dev_err(&pdev->dev, "Failed to register DAI: %d\n", ret);
 358                 sport_done(sport_handle);
 359                 return ret;
 360         }
 361
 362         return 0;
 363 }
 364
 365 static int bf5xx_i2s_remove(struct platform_device *pdev)
 366 {
 367         struct sport_device *sport_handle = platform_get_drvdata(pdev);
 368
 369         dev_dbg(&pdev->dev, "%s enter\n", __func__);
 370
 371         snd_soc_unregister_component(&pdev->dev);
 372         sport_done(sport_handle);
 373
 374         return 0;
 375 }
 376
 377 static struct platform_driver bfin_i2s_driver = {
 378         .probe  = bf5xx_i2s_probe,
 379         .remove = bf5xx_i2s_remove,
 380         .driver = {
 381                 .name = "bfin-i2s",
 382         },
 383 };
 384
 385 module_platform_driver(bfin_i2s_driver);
 386
 387 /* Module information */
 388 MODULE_AUTHOR("Cliff Cai");
 389 MODULE_DESCRIPTION("I2S driver for ADI Blackfin");
 390 MODULE_LICENSE("GPL");
 391