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
  46 struct bf5xx_i2s_port {
  47         u16 tcr1;
  48         u16 rcr1;
  49         u16 tcr2;
  50         u16 rcr2;
  51         int configured;
  52 };
  53
  54 static struct bf5xx_i2s_port bf5xx_i2s;
  55 static int sport_num = CONFIG_SND_BF5XX_SPORT_NUM;
  56
  57 static struct sport_param sport_params[2] = {
  58         {
  59                 .dma_rx_chan    = CH_SPORT0_RX,
  60                 .dma_tx_chan    = CH_SPORT0_TX,
  61                 .err_irq        = IRQ_SPORT0_ERROR,
  62                 .regs           = (struct sport_register *)SPORT0_TCR1,
  63         },
  64         {
  65                 .dma_rx_chan    = CH_SPORT1_RX,
  66                 .dma_tx_chan    = CH_SPORT1_TX,
  67                 .err_irq        = IRQ_SPORT1_ERROR,
  68                 .regs           = (struct sport_register *)SPORT1_TCR1,
  69         }
  70 };
  71
  72 /*
  73  * Setting the TFS pin selector for SPORT 0 based on whether the selected
  74  * port id F or G. If the port is F then no conflict should exist for the
  75  * TFS. When Port G is selected and EMAC then there is a conflict between
  76  * the PHY interrupt line and TFS.  Current settings prevent the conflict
  77  * by ignoring the TFS pin when Port G is selected. This allows both
  78  * codecs and EMAC using Port G concurrently.
  79  */
  80 #ifdef CONFIG_BF527_SPORT0_PORTG
  81 #define LOCAL_SPORT0_TFS (0)
  82 #else
  83 #define LOCAL_SPORT0_TFS (P_SPORT0_TFS)
  84 #endif
  85
  86 static u16 sport_req[][7] = { {P_SPORT0_DTPRI, P_SPORT0_TSCLK, P_SPORT0_RFS,
  87                 P_SPORT0_DRPRI, P_SPORT0_RSCLK, LOCAL_SPORT0_TFS, 0},
  88                 {P_SPORT1_DTPRI, P_SPORT1_TSCLK, P_SPORT1_RFS, P_SPORT1_DRPRI,
  89                 P_SPORT1_RSCLK, P_SPORT1_TFS, 0} };
  90
  91 static int bf5xx_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
  92                 unsigned int fmt)
  93 {
  94         int ret = 0;
  95
  96         /* interface format:support I2S,slave mode */
  97         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
  98         case SND_SOC_DAIFMT_I2S:
  99                 bf5xx_i2s.tcr1 |= TFSR | TCKFE;
 100                 bf5xx_i2s.rcr1 |= RFSR | RCKFE;
 101                 bf5xx_i2s.tcr2 |= TSFSE;
 102                 bf5xx_i2s.rcr2 |= RSFSE;
 103                 break;
 104         case SND_SOC_DAIFMT_DSP_A:
 105                 bf5xx_i2s.tcr1 |= TFSR;
 106                 bf5xx_i2s.rcr1 |= RFSR;
 107                 break;
 108         case SND_SOC_DAIFMT_LEFT_J:
 109                 ret = -EINVAL;
 110                 break;
 111         default:
 112                 printk(KERN_ERR "%s: Unknown DAI format type\n", __func__);
 113                 ret = -EINVAL;
 114                 break;
 115         }
 116
 117         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 118         case SND_SOC_DAIFMT_CBM_CFM:
 119                 break;
 120         case SND_SOC_DAIFMT_CBS_CFS:
 121         case SND_SOC_DAIFMT_CBM_CFS:
 122         case SND_SOC_DAIFMT_CBS_CFM:
 123                 ret = -EINVAL;
 124                 break;
 125         default:
 126                 printk(KERN_ERR "%s: Unknown DAI master type\n", __func__);
 127                 ret = -EINVAL;
 128                 break;
 129         }
 130
 131         return ret;
 132 }
 133
 134 static int bf5xx_i2s_hw_params(struct snd_pcm_substream *substream,
 135                                 struct snd_pcm_hw_params *params,
 136                                 struct snd_soc_dai *dai)
 137 {
 138         int ret = 0;
 139
 140         bf5xx_i2s.tcr2 &= ~0x1f;
 141         bf5xx_i2s.rcr2 &= ~0x1f;
 142         switch (params_format(params)) {
 143         case SNDRV_PCM_FORMAT_S16_LE:
 144                 bf5xx_i2s.tcr2 |= 15;
 145                 bf5xx_i2s.rcr2 |= 15;
 146                 sport_handle->wdsize = 2;
 147                 break;
 148         case SNDRV_PCM_FORMAT_S24_LE:
 149                 bf5xx_i2s.tcr2 |= 23;
 150                 bf5xx_i2s.rcr2 |= 23;
 151                 sport_handle->wdsize = 3;
 152                 break;
 153         case SNDRV_PCM_FORMAT_S32_LE:
 154                 bf5xx_i2s.tcr2 |= 31;
 155                 bf5xx_i2s.rcr2 |= 31;
 156                 sport_handle->wdsize = 4;
 157                 break;
 158         }
 159
 160         if (!bf5xx_i2s.configured) {
 161                 /*
 162                  * TX and RX are not independent,they are enabled at the
 163                  * same time, even if only one side is running. So, we
 164                  * need to configure both of them at the time when the first
 165                  * stream is opened.
 166                  *
 167                  * CPU DAI:slave mode.
 168                  */
 169                 bf5xx_i2s.configured = 1;
 170                 ret = sport_config_rx(sport_handle, bf5xx_i2s.rcr1,
 171                                       bf5xx_i2s.rcr2, 0, 0);
 172                 if (ret) {
 173                         pr_err("SPORT is busy!\n");
 174                         return -EBUSY;
 175                 }
 176
 177                 ret = sport_config_tx(sport_handle, bf5xx_i2s.tcr1,
 178                                       bf5xx_i2s.tcr2, 0, 0);
 179                 if (ret) {
 180                         pr_err("SPORT is busy!\n");
 181                         return -EBUSY;
 182                 }
 183         }
 184
 185         return 0;
 186 }
 187
 188 static void bf5xx_i2s_shutdown(struct snd_pcm_substream *substream,
 189                                struct snd_soc_dai *dai)
 190 {
 191         pr_debug("%s enter\n", __func__);
 192         /* No active stream, SPORT is allowed to be configured again. */
 193         if (!dai->active)
 194                 bf5xx_i2s.configured = 0;
 195 }
 196
 197 static int bf5xx_i2s_probe(struct snd_soc_dai *dai)
 198 {
 199         pr_debug("%s enter\n", __func__);
 200         if (peripheral_request_list(&sport_req[sport_num][0], "soc-audio")) {
 201                 pr_err("Requesting Peripherals failed\n");
 202                 return -EFAULT;
 203         }
 204
 205         /* request DMA for SPORT */
 206         sport_handle = sport_init(&sport_params[sport_num], 4, \
 207                         2 * sizeof(u32), NULL);
 208         if (!sport_handle) {
 209                 peripheral_free_list(&sport_req[sport_num][0]);
 210                 return -ENODEV;
 211         }
 212
 213         return 0;
 214 }
 215
 216 static int bf5xx_i2s_remove(struct snd_soc_dai *dai)
 217 {
 218         pr_debug("%s enter\n", __func__);
 219         peripheral_free_list(&sport_req[sport_num][0]);
 220         return 0;
 221 }
 222
 223 #ifdef CONFIG_PM
 224 static int bf5xx_i2s_suspend(struct snd_soc_dai *dai)
 225 {
 226
 227         pr_debug("%s : sport %d\n", __func__, dai->id);
 228
 229         if (dai->capture_active)
 230                 sport_rx_stop(sport_handle);
 231         if (dai->playback_active)
 232                 sport_tx_stop(sport_handle);
 233         return 0;
 234 }
 235
 236 static int bf5xx_i2s_resume(struct snd_soc_dai *dai)
 237 {
 238         int ret;
 239
 240         pr_debug("%s : sport %d\n", __func__, dai->id);
 241
 242         ret = sport_config_rx(sport_handle, bf5xx_i2s.rcr1,
 243                                       bf5xx_i2s.rcr2, 0, 0);
 244         if (ret) {
 245                 pr_err("SPORT is busy!\n");
 246                 return -EBUSY;
 247         }
 248
 249         ret = sport_config_tx(sport_handle, bf5xx_i2s.tcr1,
 250                                       bf5xx_i2s.tcr2, 0, 0);
 251         if (ret) {
 252                 pr_err("SPORT is busy!\n");
 253                 return -EBUSY;
 254         }
 255
 256         return 0;
 257 }
 258
 259 #else
 260 #define bf5xx_i2s_suspend       NULL
 261 #define bf5xx_i2s_resume        NULL
 262 #endif
 263
 264 #define BF5XX_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 265                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
 266                 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
 267                 SNDRV_PCM_RATE_96000)
 268
 269 #define BF5XX_I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |\
 270         SNDRV_PCM_FMTBIT_S32_LE)
 271
 272 static struct snd_soc_dai_ops bf5xx_i2s_dai_ops = {
 273         .shutdown       = bf5xx_i2s_shutdown,
 274         .hw_params      = bf5xx_i2s_hw_params,
 275         .set_fmt        = bf5xx_i2s_set_dai_fmt,
 276 };
 277
 278 static struct snd_soc_dai_driver bf5xx_i2s_dai = {
 279         .probe = bf5xx_i2s_probe,
 280         .remove = bf5xx_i2s_remove,
 281         .suspend = bf5xx_i2s_suspend,
 282         .resume = bf5xx_i2s_resume,
 283         .playback = {
 284                 .channels_min = 1,
 285                 .channels_max = 2,
 286                 .rates = BF5XX_I2S_RATES,
 287                 .formats = BF5XX_I2S_FORMATS,},
 288         .capture = {
 289                 .channels_min = 1,
 290                 .channels_max = 2,
 291                 .rates = BF5XX_I2S_RATES,
 292                 .formats = BF5XX_I2S_FORMATS,},
 293         .ops = &bf5xx_i2s_dai_ops,
 294 };
 295
 296 static int bfin_i2s_drv_probe(struct platform_device *pdev)
 297 {
 298         return snd_soc_register_dai(&pdev->dev, &bf5xx_i2s_dai);
 299 }
 300
 301 static int __devexit bfin_i2s_drv_remove(struct platform_device *pdev)
 302 {
 303         snd_soc_unregister_dai(&pdev->dev);
 304         return 0;
 305 }
 306
 307 static struct platform_driver bfin_i2s_driver = {
 308         .probe = bfin_i2s_drv_probe,
 309         .remove = __devexit_p(bfin_i2s_drv_remove),
 310
 311         .driver = {
 312                 .name = "bf5xx-i2s",
 313                 .owner = THIS_MODULE,
 314         },
 315 };
 316
 317 static int __init bfin_i2s_init(void)
 318 {
 319         return platform_driver_register(&bfin_i2s_driver);
 320 }
 321
 322 static void __exit bfin_i2s_exit(void)
 323 {
 324         platform_driver_unregister(&bfin_i2s_driver);
 325 }
 326
 327 module_init(bfin_i2s_init);
 328 module_exit(bfin_i2s_exit);
 329
 330 /* Module information */
 331 MODULE_AUTHOR("Cliff Cai");
 332 MODULE_DESCRIPTION("I2S driver for ADI Blackfin");
 333 MODULE_LICENSE("GPL");
 334