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_S8:
 144                 bf5xx_i2s->tcr2 |= 7;
 145                 bf5xx_i2s->rcr2 |= 7;
 146                 sport_handle->wdsize = 1;
 147         case SNDRV_PCM_FORMAT_S16_LE:
 148                 bf5xx_i2s.tcr2 |= 15;
 149                 bf5xx_i2s.rcr2 |= 15;
 150                 sport_handle->wdsize = 2;
 151                 break;
 152         case SNDRV_PCM_FORMAT_S24_LE:
 153                 bf5xx_i2s.tcr2 |= 23;
 154                 bf5xx_i2s.rcr2 |= 23;
 155                 sport_handle->wdsize = 3;
 156                 break;
 157         case SNDRV_PCM_FORMAT_S32_LE:
 158                 bf5xx_i2s.tcr2 |= 31;
 159                 bf5xx_i2s.rcr2 |= 31;
 160                 sport_handle->wdsize = 4;
 161                 break;
 162         }
 163
 164         if (!bf5xx_i2s.configured) {
 165                 /*
 166                  * TX and RX are not independent,they are enabled at the
 167                  * same time, even if only one side is running. So, we
 168                  * need to configure both of them at the time when the first
 169                  * stream is opened.
 170                  *
 171                  * CPU DAI:slave mode.
 172                  */
 173                 bf5xx_i2s.configured = 1;
 174                 ret = sport_config_rx(sport_handle, bf5xx_i2s.rcr1,
 175                                       bf5xx_i2s.rcr2, 0, 0);
 176                 if (ret) {
 177                         pr_err("SPORT is busy!\n");
 178                         return -EBUSY;
 179                 }
 180
 181                 ret = sport_config_tx(sport_handle, bf5xx_i2s.tcr1,
 182                                       bf5xx_i2s.tcr2, 0, 0);
 183                 if (ret) {
 184                         pr_err("SPORT is busy!\n");
 185                         return -EBUSY;
 186                 }
 187         }
 188
 189         return 0;
 190 }
 191
 192 static void bf5xx_i2s_shutdown(struct snd_pcm_substream *substream,
 193                                struct snd_soc_dai *dai)
 194 {
 195         pr_debug("%s enter\n", __func__);
 196         /* No active stream, SPORT is allowed to be configured again. */
 197         if (!dai->active)
 198                 bf5xx_i2s.configured = 0;
 199 }
 200
 201 static int bf5xx_i2s_probe(struct snd_soc_dai *dai)
 202 {
 203         pr_debug("%s enter\n", __func__);
 204         if (peripheral_request_list(&sport_req[sport_num][0], "soc-audio")) {
 205                 pr_err("Requesting Peripherals failed\n");
 206                 return -EFAULT;
 207         }
 208
 209         /* request DMA for SPORT */
 210         sport_handle = sport_init(&sport_params[sport_num], 4, \
 211                         2 * sizeof(u32), NULL);
 212         if (!sport_handle) {
 213                 peripheral_free_list(&sport_req[sport_num][0]);
 214                 return -ENODEV;
 215         }
 216
 217         return 0;
 218 }
 219
 220 static int bf5xx_i2s_remove(struct snd_soc_dai *dai)
 221 {
 222         pr_debug("%s enter\n", __func__);
 223         peripheral_free_list(&sport_req[sport_num][0]);
 224         return 0;
 225 }
 226
 227 #ifdef CONFIG_PM
 228 static int bf5xx_i2s_suspend(struct snd_soc_dai *dai)
 229 {
 230
 231         pr_debug("%s : sport %d\n", __func__, dai->id);
 232
 233         if (dai->capture_active)
 234                 sport_rx_stop(sport_handle);
 235         if (dai->playback_active)
 236                 sport_tx_stop(sport_handle);
 237         return 0;
 238 }
 239
 240 static int bf5xx_i2s_resume(struct snd_soc_dai *dai)
 241 {
 242         int ret;
 243
 244         pr_debug("%s : sport %d\n", __func__, dai->id);
 245
 246         ret = sport_config_rx(sport_handle, bf5xx_i2s.rcr1,
 247                                       bf5xx_i2s.rcr2, 0, 0);
 248         if (ret) {
 249                 pr_err("SPORT is busy!\n");
 250                 return -EBUSY;
 251         }
 252
 253         ret = sport_config_tx(sport_handle, bf5xx_i2s.tcr1,
 254                                       bf5xx_i2s.tcr2, 0, 0);
 255         if (ret) {
 256                 pr_err("SPORT is busy!\n");
 257                 return -EBUSY;
 258         }
 259
 260         return 0;
 261 }
 262
 263 #else
 264 #define bf5xx_i2s_suspend       NULL
 265 #define bf5xx_i2s_resume        NULL
 266 #endif
 267
 268 #define BF5XX_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 269                 SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
 270                 SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
 271                 SNDRV_PCM_RATE_96000)
 272
 273 #define BF5XX_I2S_FORMATS \
 274         (SNDRV_PCM_FMTBIT_S8 | \
 275          SNDRV_PCM_FMTBIT_S16_LE | \
 276          SNDRV_PCM_FMTBIT_S24_LE | \
 277          SNDRV_PCM_FMTBIT_S32_LE)
 278
 279 static struct snd_soc_dai_ops bf5xx_i2s_dai_ops = {
 280         .shutdown       = bf5xx_i2s_shutdown,
 281         .hw_params      = bf5xx_i2s_hw_params,
 282         .set_fmt        = bf5xx_i2s_set_dai_fmt,
 283 };
 284
 285 static struct snd_soc_dai_driver bf5xx_i2s_dai = {
 286         .probe = bf5xx_i2s_probe,
 287         .remove = bf5xx_i2s_remove,
 288         .suspend = bf5xx_i2s_suspend,
 289         .resume = bf5xx_i2s_resume,
 290         .playback = {
 291                 .channels_min = 1,
 292                 .channels_max = 2,
 293                 .rates = BF5XX_I2S_RATES,
 294                 .formats = BF5XX_I2S_FORMATS,},
 295         .capture = {
 296                 .channels_min = 1,
 297                 .channels_max = 2,
 298                 .rates = BF5XX_I2S_RATES,
 299                 .formats = BF5XX_I2S_FORMATS,},
 300         .ops = &bf5xx_i2s_dai_ops,
 301 };
 302
 303 static int bfin_i2s_drv_probe(struct platform_device *pdev)
 304 {
 305         return snd_soc_register_dai(&pdev->dev, &bf5xx_i2s_dai);
 306 }
 307
 308 static int __devexit bfin_i2s_drv_remove(struct platform_device *pdev)
 309 {
 310         snd_soc_unregister_dai(&pdev->dev);
 311         return 0;
 312 }
 313
 314 static struct platform_driver bfin_i2s_driver = {
 315         .probe = bfin_i2s_drv_probe,
 316         .remove = __devexit_p(bfin_i2s_drv_remove),
 317
 318         .driver = {
 319                 .name = "bfin-i2s",
 320                 .owner = THIS_MODULE,
 321         },
 322 };
 323
 324 static int __init bfin_i2s_init(void)
 325 {
 326         return platform_driver_register(&bfin_i2s_driver);
 327 }
 328
 329 static void __exit bfin_i2s_exit(void)
 330 {
 331         platform_driver_unregister(&bfin_i2s_driver);
 332 }
 333
 334 module_init(bfin_i2s_init);
 335 module_exit(bfin_i2s_exit);
 336
 337 /* Module information */
 338 MODULE_AUTHOR("Cliff Cai");
 339 MODULE_DESCRIPTION("I2S driver for ADI Blackfin");
 340 MODULE_LICENSE("GPL");
 341