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