LXR linux/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
  47struct bf5xx_i2s_port {
  48        u16 tcr1;
  49        u16 rcr1;
  50        u16 tcr2;
  51        u16 rcr2;
  52        int counter;
  53        int configured;
  54};
  55
  56static struct bf5xx_i2s_port bf5xx_i2s;
  57static int sport_num = CONFIG_SND_BF5XX_SPORT_NUM;
  58
  59static struct sport_param sport_params[2] = {
  60        {
  61                .dma_rx_chan    = CH_SPORT0_RX,
  62                .dma_tx_chan    = CH_SPORT0_TX,
  63                .err_irq        = IRQ_SPORT0_ERROR,
  64                .regs           = (struct sport_register *)SPORT0_TCR1,
  65        },
  66        {
  67                .dma_rx_chan    = CH_SPORT1_RX,
  68                .dma_tx_chan    = CH_SPORT1_TX,
  69                .err_irq        = IRQ_SPORT1_ERROR,
  70                .regs           = (struct sport_register *)SPORT1_TCR1,
  71        }
  72};
  73
  74/*
  75 * Setting the TFS pin selector for SPORT 0 based on whether the selected
  76 * port id F or G. If the port is F then no conflict should exist for the
  77 * TFS. When Port G is selected and EMAC then there is a conflict between
  78 * the PHY interrupt line and TFS.  Current settings prevent the conflict
  79 * by ignoring the TFS pin when Port G is selected. This allows both
  80 * codecs and EMAC using Port G concurrently.
  81 */
  82#ifdef CONFIG_BF527_SPORT0_PORTG
  83#define LOCAL_SPORT0_TFS (0)
  84#else
  85#define LOCAL_SPORT0_TFS (P_SPORT0_TFS)
  86#endif
  87
  88static u16 sport_req[][7] = { {P_SPORT0_DTPRI, P_SPORT0_TSCLK, P_SPORT0_RFS,
  89                P_SPORT0_DRPRI, P_SPORT0_RSCLK, LOCAL_SPORT0_TFS, 0},
  90                {P_SPORT1_DTPRI, P_SPORT1_TSCLK, P_SPORT1_RFS, P_SPORT1_DRPRI,
  91                P_SPORT1_RSCLK, P_SPORT1_TFS, 0} };
  92
  93static int bf5xx_i2s_set_dai_fmt(struct snd_soc_dai *cpu_dai,
  94                unsigned int fmt)
  95{
  96        int ret = 0;
  97
  98        /* interface format:support I2S,slave mode */
  99        switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 100        case SND_SOC_DAIFMT_I2S:
 101                bf5xx_i2s.tcr1 |= TFSR | TCKFE;
 102                bf5xx_i2s.rcr1 |= RFSR | RCKFE;
 103                bf5xx_i2s.tcr2 |= TSFSE;
 104                bf5xx_i2s.rcr2 |= RSFSE;
 105                break;
 106        case SND_SOC_DAIFMT_DSP_A:
 107                bf5xx_i2s.tcr1 |= TFSR;
 108                bf5xx_i2s.rcr1 |= RFSR;
 109                break;
 110        case SND_SOC_DAIFMT_LEFT_J:
 111                ret = -EINVAL;
 112                break;
 113        default:
 114                printk(KERN_ERR "%s: Unknown DAI format type\n", __func__);
 115                ret = -EINVAL;
 116                break;
 117        }
 118
 119        switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 120        case SND_SOC_DAIFMT_CBM_CFM:
 121                break;
 122        case SND_SOC_DAIFMT_CBS_CFS:
 123        case SND_SOC_DAIFMT_CBM_CFS:
 124        case SND_SOC_DAIFMT_CBS_CFM:
 125                ret = -EINVAL;
 126                break;
 127        default:
 128                printk(KERN_ERR "%s: Unknown DAI master type\n", __func__);
 129                ret = -EINVAL;
 130                break;
 131        }
 132
 133        return ret;
 134}
 135
 136static int bf5xx_i2s_startup(struct snd_pcm_substream *substream,
 137                             struct snd_soc_dai *dai)
 138{
 139        pr_debug("%s enter\n", __func__);
 140
 141        /*this counter is used for counting how many pcm streams are opened*/
 142        bf5xx_i2s.counter++;
 143        return 0;
 144}
 145
 146static int bf5xx_i2s_hw_params(struct snd_pcm_substream *substream,
 147                                struct snd_pcm_hw_params *params,
 148                                struct snd_soc_dai *dai)
 149{
 150        int ret = 0;
 151
 152        bf5xx_i2s.tcr2 &= ~0x1f;
 153        bf5xx_i2s.rcr2 &= ~0x1f;
 154        switch (params_format(params)) {
 155        case SNDRV_PCM_FORMAT_S16_LE:
 156                bf5xx_i2s.tcr2 |= 15;
 157                bf5xx_i2s.rcr2 |= 15;
 158                sport_handle->wdsize = 2;
 159                break;
 160        case SNDRV_PCM_FORMAT_S24_LE:
 161                bf5xx_i2s.tcr2 |= 23;
 162                bf5xx_i2s.rcr2 |= 23;
 163                sport_handle->wdsize = 3;
 164                break;
 165        case SNDRV_PCM_FORMAT_S32_LE:
 166                bf5xx_i2s.tcr2 |= 31;
 167                bf5xx_i2s.rcr2 |= 31;
 168                sport_handle->wdsize = 4;
 169                break;
 170        }
 171
 172        if (!bf5xx_i2s.configured) {
 173                /*
 174                 * TX and RX are not independent,they are enabled at the
 175                 * same time, even if only one side is running. So, we
 176                 * need to configure both of them at the time when the first
 177                 * stream is opened.
 178                 *
 179                 * CPU DAI:slave mode.
 180                 */
 181                bf5xx_i2s.configured = 1;
 182                ret = sport_config_rx(sport_handle, bf5xx_i2s.rcr1,
 183                                      bf5xx_i2s.rcr2, 0, 0);
 184                if (ret) {
 185                        pr_err("SPORT is busy!\n");
 186                        return -EBUSY;
 187                }
 188
 189                ret = sport_config_tx(sport_handle, bf5xx_i2s.tcr1,
 190                                      bf5xx_i2s.tcr2, 0, 0);
 191                if (ret) {
 192                        pr_err("SPORT is busy!\n");
 193                        return -EBUSY;
 194                }
 195        }
 196
 197        return 0;
 198}
 199
 200static void bf5xx_i2s_shutdown(struct snd_pcm_substream *substream,
 201                               struct snd_soc_dai *dai)
 202{
 203        pr_debug("%s enter\n", __func__);
 204        bf5xx_i2s.counter--;
 205        /* No active stream, SPORT is allowed to be configured again. */
 206        if (!bf5xx_i2s.counter)
 207                bf5xx_i2s.configured = 0;
 208}
 209
 210static int bf5xx_i2s_probe(struct platform_device *pdev,
 211                           struct snd_soc_dai *dai)
 212{
 213        pr_debug("%s enter\n", __func__);
 214        if (peripheral_request_list(&sport_req[sport_num][0], "soc-audio")) {
 215                pr_err("Requesting Peripherals failed\n");
 216                return -EFAULT;
 217        }
 218
 219        /* request DMA for SPORT */
 220        sport_handle = sport_init(&sport_params[sport_num], 4, \
 221                        2 * sizeof(u32), NULL);
 222        if (!sport_handle) {
 223                peripheral_free_list(&sport_req[sport_num][0]);
 224                return -ENODEV;
 225        }
 226
 227        return 0;
 228}
 229
 230static void bf5xx_i2s_remove(struct platform_device *pdev,
 231                        struct snd_soc_dai *dai)
 232{
 233        pr_debug("%s enter\n", __func__);
 234        peripheral_free_list(&sport_req[sport_num][0]);
 235}
 236
 237#ifdef CONFIG_PM
 238static int bf5xx_i2s_suspend(struct snd_soc_dai *dai)
 239{
 240
 241        pr_debug("%s : sport %d\n", __func__, dai->id);
 242
 243        if (dai->capture.active)
 244                sport_rx_stop(sport_handle);
 245        if (dai->playback.active)
 246                sport_tx_stop(sport_handle);
 247        return 0;
 248}
 249
 250static int bf5xx_i2s_resume(struct snd_soc_dai *dai)
 251{
 252        int ret;
 253
 254        pr_debug("%s : sport %d\n", __func__, dai->id);
 255
 256        ret = sport_config_rx(sport_handle, bf5xx_i2s.rcr1,
 257                                      bf5xx_i2s.rcr2, 0, 0);
 258        if (ret) {
 259                pr_err("SPORT is busy!\n");
 260                return -EBUSY;
 261        }
 262
 263        ret = sport_config_tx(sport_handle, bf5xx_i2s.tcr1,
 264                                      bf5xx_i2s.tcr2, 0, 0);
 265        if (ret) {
 266                pr_err("SPORT is busy!\n");
 267                return -EBUSY;
 268        }
 269
 270        return 0;
 271}
 272
 273#else
 274#define bf5xx_i2s_suspend       NULL
 275#define bf5xx_i2s_resume        NULL
 276#endif
 277
 278#define BF5XX_I2S_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
 279                SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 | \
 280                SNDRV_PCM_RATE_44100 | SNDRV_PCM_RATE_48000 | \
 281                SNDRV_PCM_RATE_96000)
 282
 283#define BF5XX_I2S_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE |\
 284        SNDRV_PCM_FMTBIT_S32_LE)
 285
 286static struct snd_soc_dai_ops bf5xx_i2s_dai_ops = {
 287        .startup        = bf5xx_i2s_startup,
 288        .shutdown       = bf5xx_i2s_shutdown,
 289        .hw_params      = bf5xx_i2s_hw_params,
 290        .set_fmt        = bf5xx_i2s_set_dai_fmt,
 291};
 292
 293struct snd_soc_dai bf5xx_i2s_dai = {
 294        .name = "bf5xx-i2s",
 295        .id = 0,
 296        .probe = bf5xx_i2s_probe,
 297        .remove = bf5xx_i2s_remove,
 298        .suspend = bf5xx_i2s_suspend,
 299        .resume = bf5xx_i2s_resume,
 300        .playback = {
 301                .channels_min = 1,
 302                .channels_max = 2,
 303                .rates = BF5XX_I2S_RATES,
 304                .formats = BF5XX_I2S_FORMATS,},
 305        .capture = {
 306                .channels_min = 1,
 307                .channels_max = 2,
 308                .rates = BF5XX_I2S_RATES,
 309                .formats = BF5XX_I2S_FORMATS,},
 310        .ops = &bf5xx_i2s_dai_ops,
 311};
 312EXPORT_SYMBOL_GPL(bf5xx_i2s_dai);
 313
 314static int __init bfin_i2s_init(void)
 315{
 316        return snd_soc_register_dai(&bf5xx_i2s_dai);
 317}
 318module_init(bfin_i2s_init);
 319
 320static void __exit bfin_i2s_exit(void)
 321{
 322        snd_soc_unregister_dai(&bf5xx_i2s_dai);
 323}
 324module_exit(bfin_i2s_exit);
 325
 326/* Module information */
 327MODULE_AUTHOR("Cliff Cai");
 328MODULE_DESCRIPTION("I2S driver for ADI Blackfin");
 329MODULE_LICENSE("GPL");
 330
 331