git.oblomov.eu Git - linux-2.6/blob - sound/soc/omap/omap-mcbsp.c

   1 /*
   2  * omap-mcbsp.c  --  OMAP ALSA SoC DAI driver using McBSP port
   3  *
   4  * Copyright (C) 2008 Nokia Corporation
   5  *
   6  * Contact: Jarkko Nikula <jhnikula@gmail.com>
   7  *          Peter Ujfalusi <peter.ujfalusi@nokia.com>
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * version 2 as published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  21  * 02110-1301 USA
  22  *
  23  */
  24
  25 #include <linux/init.h>
  26 #include <linux/module.h>
  27 #include <linux/device.h>
  28 #include <sound/core.h>
  29 #include <sound/pcm.h>
  30 #include <sound/pcm_params.h>
  31 #include <sound/initval.h>
  32 #include <sound/soc.h>
  33
  34 #include <mach/control.h>
  35 #include <mach/dma.h>
  36 #include <mach/mcbsp.h>
  37 #include "omap-mcbsp.h"
  38 #include "omap-pcm.h"
  39
  40 #define OMAP_MCBSP_RATES        (SNDRV_PCM_RATE_8000_96000)
  41
  42 struct omap_mcbsp_data {
  43         unsigned int                    bus_id;
  44         struct omap_mcbsp_reg_cfg       regs;
  45         unsigned int                    fmt;
  46         /*
  47          * Flags indicating is the bus already activated and configured by
  48          * another substream
  49          */
  50         int                             active;
  51         int                             configured;
  52 };
  53
  54 #define to_mcbsp(priv)  container_of((priv), struct omap_mcbsp_data, bus_id)
  55
  56 static struct omap_mcbsp_data mcbsp_data[NUM_LINKS];
  57
  58 /*
  59  * Stream DMA parameters. DMA request line and port address are set runtime
  60  * since they are different between OMAP1 and later OMAPs
  61  */
  62 static struct omap_pcm_dma_data omap_mcbsp_dai_dma_params[NUM_LINKS][2];
  63
  64 #if defined(CONFIG_ARCH_OMAP15XX) || defined(CONFIG_ARCH_OMAP16XX)
  65 static const int omap1_dma_reqs[][2] = {
  66         { OMAP_DMA_MCBSP1_TX, OMAP_DMA_MCBSP1_RX },
  67         { OMAP_DMA_MCBSP2_TX, OMAP_DMA_MCBSP2_RX },
  68         { OMAP_DMA_MCBSP3_TX, OMAP_DMA_MCBSP3_RX },
  69 };
  70 static const unsigned long omap1_mcbsp_port[][2] = {
  71         { OMAP1510_MCBSP1_BASE + OMAP_MCBSP_REG_DXR1,
  72           OMAP1510_MCBSP1_BASE + OMAP_MCBSP_REG_DRR1 },
  73         { OMAP1510_MCBSP2_BASE + OMAP_MCBSP_REG_DXR1,
  74           OMAP1510_MCBSP2_BASE + OMAP_MCBSP_REG_DRR1 },
  75         { OMAP1510_MCBSP3_BASE + OMAP_MCBSP_REG_DXR1,
  76           OMAP1510_MCBSP3_BASE + OMAP_MCBSP_REG_DRR1 },
  77 };
  78 #else
  79 static const int omap1_dma_reqs[][2] = {};
  80 static const unsigned long omap1_mcbsp_port[][2] = {};
  81 #endif
  82
  83 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
  84 static const int omap24xx_dma_reqs[][2] = {
  85         { OMAP24XX_DMA_MCBSP1_TX, OMAP24XX_DMA_MCBSP1_RX },
  86         { OMAP24XX_DMA_MCBSP2_TX, OMAP24XX_DMA_MCBSP2_RX },
  87 #if defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP34XX)
  88         { OMAP24XX_DMA_MCBSP3_TX, OMAP24XX_DMA_MCBSP3_RX },
  89         { OMAP24XX_DMA_MCBSP4_TX, OMAP24XX_DMA_MCBSP4_RX },
  90         { OMAP24XX_DMA_MCBSP5_TX, OMAP24XX_DMA_MCBSP5_RX },
  91 #endif
  92 };
  93 #else
  94 static const int omap24xx_dma_reqs[][2] = {};
  95 #endif
  96
  97 #if defined(CONFIG_ARCH_OMAP2420)
  98 static const unsigned long omap2420_mcbsp_port[][2] = {
  99         { OMAP24XX_MCBSP1_BASE + OMAP_MCBSP_REG_DXR1,
 100           OMAP24XX_MCBSP1_BASE + OMAP_MCBSP_REG_DRR1 },
 101         { OMAP24XX_MCBSP2_BASE + OMAP_MCBSP_REG_DXR1,
 102           OMAP24XX_MCBSP2_BASE + OMAP_MCBSP_REG_DRR1 },
 103 };
 104 #else
 105 static const unsigned long omap2420_mcbsp_port[][2] = {};
 106 #endif
 107
 108 #if defined(CONFIG_ARCH_OMAP2430)
 109 static const unsigned long omap2430_mcbsp_port[][2] = {
 110         { OMAP24XX_MCBSP1_BASE + OMAP_MCBSP_REG_DXR,
 111           OMAP24XX_MCBSP1_BASE + OMAP_MCBSP_REG_DRR },
 112         { OMAP24XX_MCBSP2_BASE + OMAP_MCBSP_REG_DXR,
 113           OMAP24XX_MCBSP2_BASE + OMAP_MCBSP_REG_DRR },
 114         { OMAP2430_MCBSP3_BASE + OMAP_MCBSP_REG_DXR,
 115           OMAP2430_MCBSP3_BASE + OMAP_MCBSP_REG_DRR },
 116         { OMAP2430_MCBSP4_BASE + OMAP_MCBSP_REG_DXR,
 117           OMAP2430_MCBSP4_BASE + OMAP_MCBSP_REG_DRR },
 118         { OMAP2430_MCBSP5_BASE + OMAP_MCBSP_REG_DXR,
 119           OMAP2430_MCBSP5_BASE + OMAP_MCBSP_REG_DRR },
 120 };
 121 #else
 122 static const unsigned long omap2430_mcbsp_port[][2] = {};
 123 #endif
 124
 125 #if defined(CONFIG_ARCH_OMAP34XX)
 126 static const unsigned long omap34xx_mcbsp_port[][2] = {
 127         { OMAP34XX_MCBSP1_BASE + OMAP_MCBSP_REG_DXR,
 128           OMAP34XX_MCBSP1_BASE + OMAP_MCBSP_REG_DRR },
 129         { OMAP34XX_MCBSP2_BASE + OMAP_MCBSP_REG_DXR,
 130           OMAP34XX_MCBSP2_BASE + OMAP_MCBSP_REG_DRR },
 131         { OMAP34XX_MCBSP3_BASE + OMAP_MCBSP_REG_DXR,
 132           OMAP34XX_MCBSP3_BASE + OMAP_MCBSP_REG_DRR },
 133         { OMAP34XX_MCBSP4_BASE + OMAP_MCBSP_REG_DXR,
 134           OMAP34XX_MCBSP4_BASE + OMAP_MCBSP_REG_DRR },
 135         { OMAP34XX_MCBSP5_BASE + OMAP_MCBSP_REG_DXR,
 136           OMAP34XX_MCBSP5_BASE + OMAP_MCBSP_REG_DRR },
 137 };
 138 #else
 139 static const unsigned long omap34xx_mcbsp_port[][2] = {};
 140 #endif
 141
 142 static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream,
 143                                   struct snd_soc_dai *dai)
 144 {
 145         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 146         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
 147         struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
 148         int err = 0;
 149
 150         if (cpu_is_omap343x() && mcbsp_data->bus_id == 1) {
 151                 /*
 152                  * McBSP2 in OMAP3 has 1024 * 32-bit internal audio buffer.
 153                  * Set constraint for minimum buffer size to the same than FIFO
 154                  * size in order to avoid underruns in playback startup because
 155                  * HW is keeping the DMA request active until FIFO is filled.
 156                  */
 157                 snd_pcm_hw_constraint_minmax(substream->runtime,
 158                         SNDRV_PCM_HW_PARAM_BUFFER_BYTES, 4096, UINT_MAX);
 159         }
 160
 161         if (!cpu_dai->active)
 162                 err = omap_mcbsp_request(mcbsp_data->bus_id);
 163
 164         return err;
 165 }
 166
 167 static void omap_mcbsp_dai_shutdown(struct snd_pcm_substream *substream,
 168                                     struct snd_soc_dai *dai)
 169 {
 170         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 171         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
 172         struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
 173
 174         if (!cpu_dai->active) {
 175                 omap_mcbsp_free(mcbsp_data->bus_id);
 176                 mcbsp_data->configured = 0;
 177         }
 178 }
 179
 180 static int omap_mcbsp_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 181                                   struct snd_soc_dai *dai)
 182 {
 183         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 184         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
 185         struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
 186         int err = 0;
 187
 188         switch (cmd) {
 189         case SNDRV_PCM_TRIGGER_START:
 190         case SNDRV_PCM_TRIGGER_RESUME:
 191         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 192                 if (!mcbsp_data->active++)
 193                         omap_mcbsp_start(mcbsp_data->bus_id);
 194                 break;
 195
 196         case SNDRV_PCM_TRIGGER_STOP:
 197         case SNDRV_PCM_TRIGGER_SUSPEND:
 198         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 199                 if (!--mcbsp_data->active)
 200                         omap_mcbsp_stop(mcbsp_data->bus_id);
 201                 break;
 202         default:
 203                 err = -EINVAL;
 204         }
 205
 206         return err;
 207 }
 208
 209 static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream,
 210                                     struct snd_pcm_hw_params *params,
 211                                     struct snd_soc_dai *dai)
 212 {
 213         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 214         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
 215         struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
 216         struct omap_mcbsp_reg_cfg *regs = &mcbsp_data->regs;
 217         int dma, bus_id = mcbsp_data->bus_id, id = cpu_dai->id;
 218         int wlen, channels, wpf;
 219         unsigned long port;
 220         unsigned int format;
 221
 222         if (cpu_class_is_omap1()) {
 223                 dma = omap1_dma_reqs[bus_id][substream->stream];
 224                 port = omap1_mcbsp_port[bus_id][substream->stream];
 225         } else if (cpu_is_omap2420()) {
 226                 dma = omap24xx_dma_reqs[bus_id][substream->stream];
 227                 port = omap2420_mcbsp_port[bus_id][substream->stream];
 228         } else if (cpu_is_omap2430()) {
 229                 dma = omap24xx_dma_reqs[bus_id][substream->stream];
 230                 port = omap2430_mcbsp_port[bus_id][substream->stream];
 231         } else if (cpu_is_omap343x()) {
 232                 dma = omap24xx_dma_reqs[bus_id][substream->stream];
 233                 port = omap34xx_mcbsp_port[bus_id][substream->stream];
 234         } else {
 235                 return -ENODEV;
 236         }
 237         omap_mcbsp_dai_dma_params[id][substream->stream].name =
 238                 substream->stream ? "Audio Capture" : "Audio Playback";
 239         omap_mcbsp_dai_dma_params[id][substream->stream].dma_req = dma;
 240         omap_mcbsp_dai_dma_params[id][substream->stream].port_addr = port;
 241         cpu_dai->dma_data = &omap_mcbsp_dai_dma_params[id][substream->stream];
 242
 243         if (mcbsp_data->configured) {
 244                 /* McBSP already configured by another stream */
 245                 return 0;
 246         }
 247
 248         format = mcbsp_data->fmt & SND_SOC_DAIFMT_FORMAT_MASK;
 249         wpf = channels = params_channels(params);
 250         switch (channels) {
 251         case 2:
 252                 if (format == SND_SOC_DAIFMT_I2S) {
 253                         /* Use dual-phase frames */
 254                         regs->rcr2      |= RPHASE;
 255                         regs->xcr2      |= XPHASE;
 256                         /* Set 1 word per (McBSP) frame for phase1 and phase2 */
 257                         wpf--;
 258                         regs->rcr2      |= RFRLEN2(wpf - 1);
 259                         regs->xcr2      |= XFRLEN2(wpf - 1);
 260                 }
 261         case 1:
 262         case 4:
 263                 /* Set word per (McBSP) frame for phase1 */
 264                 regs->rcr1      |= RFRLEN1(wpf - 1);
 265                 regs->xcr1      |= XFRLEN1(wpf - 1);
 266                 break;
 267         default:
 268                 /* Unsupported number of channels */
 269                 return -EINVAL;
 270         }
 271
 272         switch (params_format(params)) {
 273         case SNDRV_PCM_FORMAT_S16_LE:
 274                 /* Set word lengths */
 275                 wlen = 16;
 276                 regs->rcr2      |= RWDLEN2(OMAP_MCBSP_WORD_16);
 277                 regs->rcr1      |= RWDLEN1(OMAP_MCBSP_WORD_16);
 278                 regs->xcr2      |= XWDLEN2(OMAP_MCBSP_WORD_16);
 279                 regs->xcr1      |= XWDLEN1(OMAP_MCBSP_WORD_16);
 280                 break;
 281         default:
 282                 /* Unsupported PCM format */
 283                 return -EINVAL;
 284         }
 285
 286         /* Set FS period and length in terms of bit clock periods */
 287         switch (format) {
 288         case SND_SOC_DAIFMT_I2S:
 289                 regs->srgr2     |= FPER(wlen * channels - 1);
 290                 regs->srgr1     |= FWID(wlen - 1);
 291                 break;
 292         case SND_SOC_DAIFMT_DSP_A:
 293         case SND_SOC_DAIFMT_DSP_B:
 294                 regs->srgr2     |= FPER(wlen * channels - 1);
 295                 regs->srgr1     |= FWID(0);
 296                 break;
 297         }
 298
 299         omap_mcbsp_config(bus_id, &mcbsp_data->regs);
 300         mcbsp_data->configured = 1;
 301
 302         return 0;
 303 }
 304
 305 /*
 306  * This must be called before _set_clkdiv and _set_sysclk since McBSP register
 307  * cache is initialized here
 308  */
 309 static int omap_mcbsp_dai_set_dai_fmt(struct snd_soc_dai *cpu_dai,
 310                                       unsigned int fmt)
 311 {
 312         struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
 313         struct omap_mcbsp_reg_cfg *regs = &mcbsp_data->regs;
 314         unsigned int temp_fmt = fmt;
 315
 316         if (mcbsp_data->configured)
 317                 return 0;
 318
 319         mcbsp_data->fmt = fmt;
 320         memset(regs, 0, sizeof(*regs));
 321         /* Generic McBSP register settings */
 322         regs->spcr2     |= XINTM(3) | FREE;
 323         regs->spcr1     |= RINTM(3);
 324         regs->rcr2      |= RFIG;
 325         regs->xcr2      |= XFIG;
 326         if (cpu_is_omap2430() || cpu_is_omap34xx()) {
 327                 regs->xccr = DXENDLY(1) | XDMAEN;
 328                 regs->rccr = RFULL_CYCLE | RDMAEN;
 329         }
 330
 331         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 332         case SND_SOC_DAIFMT_I2S:
 333                 /* 1-bit data delay */
 334                 regs->rcr2      |= RDATDLY(1);
 335                 regs->xcr2      |= XDATDLY(1);
 336                 break;
 337         case SND_SOC_DAIFMT_DSP_A:
 338                 /* 1-bit data delay */
 339                 regs->rcr2      |= RDATDLY(1);
 340                 regs->xcr2      |= XDATDLY(1);
 341                 /* Invert FS polarity configuration */
 342                 temp_fmt ^= SND_SOC_DAIFMT_NB_IF;
 343                 break;
 344         case SND_SOC_DAIFMT_DSP_B:
 345                 /* 0-bit data delay */
 346                 regs->rcr2      |= RDATDLY(0);
 347                 regs->xcr2      |= XDATDLY(0);
 348                 /* Invert FS polarity configuration */
 349                 temp_fmt ^= SND_SOC_DAIFMT_NB_IF;
 350                 break;
 351         default:
 352                 /* Unsupported data format */
 353                 return -EINVAL;
 354         }
 355
 356         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 357         case SND_SOC_DAIFMT_CBS_CFS:
 358                 /* McBSP master. Set FS and bit clocks as outputs */
 359                 regs->pcr0      |= FSXM | FSRM |
 360                                    CLKXM | CLKRM;
 361                 /* Sample rate generator drives the FS */
 362                 regs->srgr2     |= FSGM;
 363                 break;
 364         case SND_SOC_DAIFMT_CBM_CFM:
 365                 /* McBSP slave */
 366                 break;
 367         default:
 368                 /* Unsupported master/slave configuration */
 369                 return -EINVAL;
 370         }
 371
 372         /* Set bit clock (CLKX/CLKR) and FS polarities */
 373         switch (temp_fmt & SND_SOC_DAIFMT_INV_MASK) {
 374         case SND_SOC_DAIFMT_NB_NF:
 375                 /*
 376                  * Normal BCLK + FS.
 377                  * FS active low. TX data driven on falling edge of bit clock
 378                  * and RX data sampled on rising edge of bit clock.
 379                  */
 380                 regs->pcr0      |= FSXP | FSRP |
 381                                    CLKXP | CLKRP;
 382                 break;
 383         case SND_SOC_DAIFMT_NB_IF:
 384                 regs->pcr0      |= CLKXP | CLKRP;
 385                 break;
 386         case SND_SOC_DAIFMT_IB_NF:
 387                 regs->pcr0      |= FSXP | FSRP;
 388                 break;
 389         case SND_SOC_DAIFMT_IB_IF:
 390                 break;
 391         default:
 392                 return -EINVAL;
 393         }
 394
 395         return 0;
 396 }
 397
 398 static int omap_mcbsp_dai_set_clkdiv(struct snd_soc_dai *cpu_dai,
 399                                      int div_id, int div)
 400 {
 401         struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
 402         struct omap_mcbsp_reg_cfg *regs = &mcbsp_data->regs;
 403
 404         if (div_id != OMAP_MCBSP_CLKGDV)
 405                 return -ENODEV;
 406
 407         regs->srgr1     |= CLKGDV(div - 1);
 408
 409         return 0;
 410 }
 411
 412 static int omap_mcbsp_dai_set_clks_src(struct omap_mcbsp_data *mcbsp_data,
 413                                        int clk_id)
 414 {
 415         int sel_bit;
 416         u16 reg, reg_devconf1 = OMAP243X_CONTROL_DEVCONF1;
 417
 418         if (cpu_class_is_omap1()) {
 419                 /* OMAP1's can use only external source clock */
 420                 if (unlikely(clk_id == OMAP_MCBSP_SYSCLK_CLKS_FCLK))
 421                         return -EINVAL;
 422                 else
 423                         return 0;
 424         }
 425
 426         if (cpu_is_omap2420() && mcbsp_data->bus_id > 1)
 427                 return -EINVAL;
 428
 429         if (cpu_is_omap343x())
 430                 reg_devconf1 = OMAP343X_CONTROL_DEVCONF1;
 431
 432         switch (mcbsp_data->bus_id) {
 433         case 0:
 434                 reg = OMAP2_CONTROL_DEVCONF0;
 435                 sel_bit = 2;
 436                 break;
 437         case 1:
 438                 reg = OMAP2_CONTROL_DEVCONF0;
 439                 sel_bit = 6;
 440                 break;
 441         case 2:
 442                 reg = reg_devconf1;
 443                 sel_bit = 0;
 444                 break;
 445         case 3:
 446                 reg = reg_devconf1;
 447                 sel_bit = 2;
 448                 break;
 449         case 4:
 450                 reg = reg_devconf1;
 451                 sel_bit = 4;
 452                 break;
 453         default:
 454                 return -EINVAL;
 455         }
 456
 457         if (clk_id == OMAP_MCBSP_SYSCLK_CLKS_FCLK)
 458                 omap_ctrl_writel(omap_ctrl_readl(reg) & ~(1 << sel_bit), reg);
 459         else
 460                 omap_ctrl_writel(omap_ctrl_readl(reg) | (1 << sel_bit), reg);
 461
 462         return 0;
 463 }
 464
 465 static int omap_mcbsp_dai_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
 466                                          int clk_id, unsigned int freq,
 467                                          int dir)
 468 {
 469         struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
 470         struct omap_mcbsp_reg_cfg *regs = &mcbsp_data->regs;
 471         int err = 0;
 472
 473         switch (clk_id) {
 474         case OMAP_MCBSP_SYSCLK_CLK:
 475                 regs->srgr2     |= CLKSM;
 476                 break;
 477         case OMAP_MCBSP_SYSCLK_CLKS_FCLK:
 478         case OMAP_MCBSP_SYSCLK_CLKS_EXT:
 479                 err = omap_mcbsp_dai_set_clks_src(mcbsp_data, clk_id);
 480                 break;
 481
 482         case OMAP_MCBSP_SYSCLK_CLKX_EXT:
 483                 regs->srgr2     |= CLKSM;
 484         case OMAP_MCBSP_SYSCLK_CLKR_EXT:
 485                 regs->pcr0      |= SCLKME;
 486                 break;
 487         default:
 488                 err = -ENODEV;
 489         }
 490
 491         return err;
 492 }
 493
 494 static struct snd_soc_dai_ops omap_mcbsp_dai_ops = {
 495         .startup        = omap_mcbsp_dai_startup,
 496         .shutdown       = omap_mcbsp_dai_shutdown,
 497         .trigger        = omap_mcbsp_dai_trigger,
 498         .hw_params      = omap_mcbsp_dai_hw_params,
 499         .set_fmt        = omap_mcbsp_dai_set_dai_fmt,
 500         .set_clkdiv     = omap_mcbsp_dai_set_clkdiv,
 501         .set_sysclk     = omap_mcbsp_dai_set_dai_sysclk,
 502 };
 503
 504 #define OMAP_MCBSP_DAI_BUILDER(link_id)                         \
 505 {                                                               \
 506         .name = "omap-mcbsp-dai-"#link_id,                      \
 507         .id = (link_id),                                        \
 508         .playback = {                                           \
 509                 .channels_min = 1,                              \
 510                 .channels_max = 4,                              \
 511                 .rates = OMAP_MCBSP_RATES,                      \
 512                 .formats = SNDRV_PCM_FMTBIT_S16_LE,             \
 513         },                                                      \
 514         .capture = {                                            \
 515                 .channels_min = 1,                              \
 516                 .channels_max = 4,                              \
 517                 .rates = OMAP_MCBSP_RATES,                      \
 518                 .formats = SNDRV_PCM_FMTBIT_S16_LE,             \
 519         },                                                      \
 520         .ops = &omap_mcbsp_dai_ops,                             \
 521         .private_data = &mcbsp_data[(link_id)].bus_id,          \
 522 }
 523
 524 struct snd_soc_dai omap_mcbsp_dai[] = {
 525         OMAP_MCBSP_DAI_BUILDER(0),
 526         OMAP_MCBSP_DAI_BUILDER(1),
 527 #if NUM_LINKS >= 3
 528         OMAP_MCBSP_DAI_BUILDER(2),
 529 #endif
 530 #if NUM_LINKS == 5
 531         OMAP_MCBSP_DAI_BUILDER(3),
 532         OMAP_MCBSP_DAI_BUILDER(4),
 533 #endif
 534 };
 535
 536 EXPORT_SYMBOL_GPL(omap_mcbsp_dai);
 537
 538 static int __init snd_omap_mcbsp_init(void)
 539 {
 540         return snd_soc_register_dais(omap_mcbsp_dai,
 541                                      ARRAY_SIZE(omap_mcbsp_dai));
 542 }
 543 module_init(snd_omap_mcbsp_init);
 544
 545 static void __exit snd_omap_mcbsp_exit(void)
 546 {
 547         snd_soc_unregister_dais(omap_mcbsp_dai, ARRAY_SIZE(omap_mcbsp_dai));
 548 }
 549 module_exit(snd_omap_mcbsp_exit);
 550
 551 MODULE_AUTHOR("Jarkko Nikula <jhnikula@gmail.com>");
 552 MODULE_DESCRIPTION("OMAP I2S SoC Interface");
 553 MODULE_LICENSE("GPL");