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 <jarkko.nikula@bitmer.com>
   7  *          Peter Ujfalusi <peter.ujfalusi@ti.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 <plat/dma.h>
  35 #include <plat/mcbsp.h>
  36 #include "omap-mcbsp.h"
  37 #include "omap-pcm.h"
  38
  39 #define OMAP_MCBSP_RATES        (SNDRV_PCM_RATE_8000_96000)
  40
  41 #define OMAP_MCBSP_SOC_SINGLE_S16_EXT(xname, xmin, xmax, \
  42         xhandler_get, xhandler_put) \
  43 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
  44         .info = omap_mcbsp_st_info_volsw, \
  45         .get = xhandler_get, .put = xhandler_put, \
  46         .private_value = (unsigned long) &(struct soc_mixer_control) \
  47         {.min = xmin, .max = xmax} }
  48
  49 struct omap_mcbsp_data {
  50         unsigned int                    bus_id;
  51         struct omap_mcbsp_reg_cfg       regs;
  52         unsigned int                    fmt;
  53         /*
  54          * Flags indicating is the bus already activated and configured by
  55          * another substream
  56          */
  57         int                             active;
  58         int                             configured;
  59         unsigned int                    in_freq;
  60         int                             clk_div;
  61         int                             wlen;
  62 };
  63
  64 static struct omap_mcbsp_data mcbsp_data[NUM_LINKS];
  65
  66 /*
  67  * Stream DMA parameters. DMA request line and port address are set runtime
  68  * since they are different between OMAP1 and later OMAPs
  69  */
  70 static struct omap_pcm_dma_data omap_mcbsp_dai_dma_params[NUM_LINKS][2];
  71
  72 static void omap_mcbsp_set_threshold(struct snd_pcm_substream *substream)
  73 {
  74         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  75         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  76         struct omap_mcbsp_data *mcbsp_data = snd_soc_dai_get_drvdata(cpu_dai);
  77         struct omap_pcm_dma_data *dma_data;
  78         int dma_op_mode = omap_mcbsp_get_dma_op_mode(mcbsp_data->bus_id);
  79         int words;
  80
  81         dma_data = snd_soc_dai_get_dma_data(rtd->cpu_dai, substream);
  82
  83         /* TODO: Currently, MODE_ELEMENT == MODE_FRAME */
  84         if (dma_op_mode == MCBSP_DMA_MODE_THRESHOLD)
  85                 /*
  86                  * Configure McBSP threshold based on either:
  87                  * packet_size, when the sDMA is in packet mode, or
  88                  * based on the period size.
  89                  */
  90                 if (dma_data->packet_size)
  91                         words = dma_data->packet_size;
  92                 else
  93                         words = snd_pcm_lib_period_bytes(substream) /
  94                                                         (mcbsp_data->wlen / 8);
  95         else
  96                 words = 1;
  97
  98         /* Configure McBSP internal buffer usage */
  99         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 100                 omap_mcbsp_set_tx_threshold(mcbsp_data->bus_id, words);
 101         else
 102                 omap_mcbsp_set_rx_threshold(mcbsp_data->bus_id, words);
 103 }
 104
 105 static int omap_mcbsp_hwrule_min_buffersize(struct snd_pcm_hw_params *params,
 106                                     struct snd_pcm_hw_rule *rule)
 107 {
 108         struct snd_interval *buffer_size = hw_param_interval(params,
 109                                         SNDRV_PCM_HW_PARAM_BUFFER_SIZE);
 110         struct snd_interval *channels = hw_param_interval(params,
 111                                         SNDRV_PCM_HW_PARAM_CHANNELS);
 112         struct omap_mcbsp_data *mcbsp_data = rule->private;
 113         struct snd_interval frames;
 114         int size;
 115
 116         snd_interval_any(&frames);
 117         size = omap_mcbsp_get_fifo_size(mcbsp_data->bus_id);
 118
 119         frames.min = size / channels->min;
 120         frames.integer = 1;
 121         return snd_interval_refine(buffer_size, &frames);
 122 }
 123
 124 static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream,
 125                                   struct snd_soc_dai *cpu_dai)
 126 {
 127         struct omap_mcbsp_data *mcbsp_data = snd_soc_dai_get_drvdata(cpu_dai);
 128         int bus_id = mcbsp_data->bus_id;
 129         int err = 0;
 130
 131         if (!cpu_dai->active)
 132                 err = omap_mcbsp_request(bus_id);
 133
 134         /*
 135          * OMAP3 McBSP FIFO is word structured.
 136          * McBSP2 has 1024 + 256 = 1280 word long buffer,
 137          * McBSP1,3,4,5 has 128 word long buffer
 138          * This means that the size of the FIFO depends on the sample format.
 139          * For example on McBSP3:
 140          * 16bit samples: size is 128 * 2 = 256 bytes
 141          * 32bit samples: size is 128 * 4 = 512 bytes
 142          * It is simpler to place constraint for buffer and period based on
 143          * channels.
 144          * McBSP3 as example again (16 or 32 bit samples):
 145          * 1 channel (mono): size is 128 frames (128 words)
 146          * 2 channels (stereo): size is 128 / 2 = 64 frames (2 * 64 words)
 147          * 4 channels: size is 128 / 4 = 32 frames (4 * 32 words)
 148          */
 149         if (cpu_is_omap34xx() || cpu_is_omap44xx()) {
 150                 /*
 151                 * Rule for the buffer size. We should not allow
 152                 * smaller buffer than the FIFO size to avoid underruns
 153                 */
 154                 snd_pcm_hw_rule_add(substream->runtime, 0,
 155                                     SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
 156                                     omap_mcbsp_hwrule_min_buffersize,
 157                                     mcbsp_data,
 158                                     SNDRV_PCM_HW_PARAM_CHANNELS, -1);
 159
 160                 /* Make sure, that the period size is always even */
 161                 snd_pcm_hw_constraint_step(substream->runtime, 0,
 162                                            SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 2);
 163         }
 164
 165         return err;
 166 }
 167
 168 static void omap_mcbsp_dai_shutdown(struct snd_pcm_substream *substream,
 169                                     struct snd_soc_dai *cpu_dai)
 170 {
 171         struct omap_mcbsp_data *mcbsp_data = snd_soc_dai_get_drvdata(cpu_dai);
 172
 173         if (!cpu_dai->active) {
 174                 omap_mcbsp_free(mcbsp_data->bus_id);
 175                 mcbsp_data->configured = 0;
 176         }
 177 }
 178
 179 static int omap_mcbsp_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 180                                   struct snd_soc_dai *cpu_dai)
 181 {
 182         struct omap_mcbsp_data *mcbsp_data = snd_soc_dai_get_drvdata(cpu_dai);
 183         int err = 0, play = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
 184
 185         switch (cmd) {
 186         case SNDRV_PCM_TRIGGER_START:
 187         case SNDRV_PCM_TRIGGER_RESUME:
 188         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 189                 mcbsp_data->active++;
 190                 omap_mcbsp_start(mcbsp_data->bus_id, play, !play);
 191                 break;
 192
 193         case SNDRV_PCM_TRIGGER_STOP:
 194         case SNDRV_PCM_TRIGGER_SUSPEND:
 195         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 196                 omap_mcbsp_stop(mcbsp_data->bus_id, play, !play);
 197                 mcbsp_data->active--;
 198                 break;
 199         default:
 200                 err = -EINVAL;
 201         }
 202
 203         return err;
 204 }
 205
 206 static snd_pcm_sframes_t omap_mcbsp_dai_delay(
 207                         struct snd_pcm_substream *substream,
 208                         struct snd_soc_dai *dai)
 209 {
 210         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 211         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 212         struct omap_mcbsp_data *mcbsp_data = snd_soc_dai_get_drvdata(cpu_dai);
 213         u16 fifo_use;
 214         snd_pcm_sframes_t delay;
 215
 216         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 217                 fifo_use = omap_mcbsp_get_tx_delay(mcbsp_data->bus_id);
 218         else
 219                 fifo_use = omap_mcbsp_get_rx_delay(mcbsp_data->bus_id);
 220
 221         /*
 222          * Divide the used locations with the channel count to get the
 223          * FIFO usage in samples (don't care about partial samples in the
 224          * buffer).
 225          */
 226         delay = fifo_use / substream->runtime->channels;
 227
 228         return delay;
 229 }
 230
 231 static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream,
 232                                     struct snd_pcm_hw_params *params,
 233                                     struct snd_soc_dai *cpu_dai)
 234 {
 235         struct omap_mcbsp_data *mcbsp_data = snd_soc_dai_get_drvdata(cpu_dai);
 236         struct omap_mcbsp_reg_cfg *regs = &mcbsp_data->regs;
 237         struct omap_pcm_dma_data *dma_data;
 238         int dma, bus_id = mcbsp_data->bus_id;
 239         int wlen, channels, wpf, sync_mode = OMAP_DMA_SYNC_ELEMENT;
 240         int pkt_size = 0;
 241         unsigned long port;
 242         unsigned int format, div, framesize, master;
 243
 244         dma_data = &omap_mcbsp_dai_dma_params[cpu_dai->id][substream->stream];
 245
 246         dma = omap_mcbsp_dma_ch_params(bus_id, substream->stream);
 247         port = omap_mcbsp_dma_reg_params(bus_id, substream->stream);
 248
 249         switch (params_format(params)) {
 250         case SNDRV_PCM_FORMAT_S16_LE:
 251                 dma_data->data_type = OMAP_DMA_DATA_TYPE_S16;
 252                 wlen = 16;
 253                 break;
 254         case SNDRV_PCM_FORMAT_S32_LE:
 255                 dma_data->data_type = OMAP_DMA_DATA_TYPE_S32;
 256                 wlen = 32;
 257                 break;
 258         default:
 259                 return -EINVAL;
 260         }
 261         if (cpu_is_omap34xx()) {
 262                 dma_data->set_threshold = omap_mcbsp_set_threshold;
 263                 /* TODO: Currently, MODE_ELEMENT == MODE_FRAME */
 264                 if (omap_mcbsp_get_dma_op_mode(bus_id) ==
 265                                                 MCBSP_DMA_MODE_THRESHOLD) {
 266                         int period_words, max_thrsh;
 267
 268                         period_words = params_period_bytes(params) / (wlen / 8);
 269                         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 270                                 max_thrsh = omap_mcbsp_get_max_tx_threshold(
 271                                                             mcbsp_data->bus_id);
 272                         else
 273                                 max_thrsh = omap_mcbsp_get_max_rx_threshold(
 274                                                             mcbsp_data->bus_id);
 275                         /*
 276                          * If the period contains less or equal number of words,
 277                          * we are using the original threshold mode setup:
 278                          * McBSP threshold = sDMA frame size = period_size
 279                          * Otherwise we switch to sDMA packet mode:
 280                          * McBSP threshold = sDMA packet size
 281                          * sDMA frame size = period size
 282                          */
 283                         if (period_words > max_thrsh) {
 284                                 int divider = 0;
 285
 286                                 /*
 287                                  * Look for the biggest threshold value, which
 288                                  * divides the period size evenly.
 289                                  */
 290                                 divider = period_words / max_thrsh;
 291                                 if (period_words % max_thrsh)
 292                                         divider++;
 293                                 while (period_words % divider &&
 294                                         divider < period_words)
 295                                         divider++;
 296                                 if (divider == period_words)
 297                                         return -EINVAL;
 298
 299                                 pkt_size = period_words / divider;
 300                                 sync_mode = OMAP_DMA_SYNC_PACKET;
 301                         } else {
 302                                 sync_mode = OMAP_DMA_SYNC_FRAME;
 303                         }
 304                 }
 305         }
 306
 307         dma_data->name = substream->stream ? "Audio Capture" : "Audio Playback";
 308         dma_data->dma_req = dma;
 309         dma_data->port_addr = port;
 310         dma_data->sync_mode = sync_mode;
 311         dma_data->packet_size = pkt_size;
 312
 313         snd_soc_dai_set_dma_data(cpu_dai, substream, dma_data);
 314
 315 #if 0
 316         if (mcbsp_data->configured) {
 317                 /* McBSP already configured by another stream */
 318                 return 0;
 319         }
 320 #endif
 321
 322         regs->rcr2      &= ~(RPHASE | RFRLEN2(0x7f) | RWDLEN2(7));
 323         regs->xcr2      &= ~(RPHASE | XFRLEN2(0x7f) | XWDLEN2(7));
 324         regs->rcr1      &= ~(RFRLEN1(0x7f) | RWDLEN1(7));
 325         regs->xcr1      &= ~(XFRLEN1(0x7f) | XWDLEN1(7));
 326         format = mcbsp_data->fmt & SND_SOC_DAIFMT_FORMAT_MASK;
 327         wpf = channels = params_channels(params);
 328         if (channels == 2 && (format == SND_SOC_DAIFMT_I2S ||
 329                               format == SND_SOC_DAIFMT_LEFT_J)) {
 330                 /* Use dual-phase frames */
 331                 regs->rcr2      |= RPHASE;
 332                 regs->xcr2      |= XPHASE;
 333                 /* Set 1 word per (McBSP) frame for phase1 and phase2 */
 334                 wpf--;
 335                 regs->rcr2      |= RFRLEN2(wpf - 1);
 336                 regs->xcr2      |= XFRLEN2(wpf - 1);
 337         }
 338
 339         regs->rcr1      |= RFRLEN1(wpf - 1);
 340         regs->xcr1      |= XFRLEN1(wpf - 1);
 341
 342         switch (params_format(params)) {
 343         case SNDRV_PCM_FORMAT_S16_LE:
 344                 /* Set word lengths */
 345                 regs->rcr2      |= RWDLEN2(OMAP_MCBSP_WORD_16);
 346                 regs->rcr1      |= RWDLEN1(OMAP_MCBSP_WORD_16);
 347                 regs->xcr2      |= XWDLEN2(OMAP_MCBSP_WORD_16);
 348                 regs->xcr1      |= XWDLEN1(OMAP_MCBSP_WORD_16);
 349                 break;
 350         case SNDRV_PCM_FORMAT_S32_LE:
 351                 /* Set word lengths */
 352                 regs->rcr2      |= RWDLEN2(OMAP_MCBSP_WORD_32);
 353                 regs->rcr1      |= RWDLEN1(OMAP_MCBSP_WORD_32);
 354                 regs->xcr2      |= XWDLEN2(OMAP_MCBSP_WORD_32);
 355                 regs->xcr1      |= XWDLEN1(OMAP_MCBSP_WORD_32);
 356                 break;
 357         default:
 358                 /* Unsupported PCM format */
 359                 return -EINVAL;
 360         }
 361
 362         /* In McBSP master modes, FRAME (i.e. sample rate) is generated
 363          * by _counting_ BCLKs. Calculate frame size in BCLKs */
 364         master = mcbsp_data->fmt & SND_SOC_DAIFMT_MASTER_MASK;
 365         if (master ==   SND_SOC_DAIFMT_CBS_CFS) {
 366                 div = mcbsp_data->clk_div ? mcbsp_data->clk_div : 1;
 367                 framesize = (mcbsp_data->in_freq / div) / params_rate(params);
 368
 369                 if (framesize < wlen * channels) {
 370                         printk(KERN_ERR "%s: not enough bandwidth for desired rate and "
 371                                         "channels\n", __func__);
 372                         return -EINVAL;
 373                 }
 374         } else
 375                 framesize = wlen * channels;
 376
 377         /* Set FS period and length in terms of bit clock periods */
 378         regs->srgr2     &= ~FPER(0xfff);
 379         regs->srgr1     &= ~FWID(0xff);
 380         switch (format) {
 381         case SND_SOC_DAIFMT_I2S:
 382         case SND_SOC_DAIFMT_LEFT_J:
 383                 regs->srgr2     |= FPER(framesize - 1);
 384                 regs->srgr1     |= FWID((framesize >> 1) - 1);
 385                 break;
 386         case SND_SOC_DAIFMT_DSP_A:
 387         case SND_SOC_DAIFMT_DSP_B:
 388                 regs->srgr2     |= FPER(framesize - 1);
 389                 regs->srgr1     |= FWID(0);
 390                 break;
 391         }
 392
 393         omap_mcbsp_config(bus_id, &mcbsp_data->regs);
 394         mcbsp_data->wlen = wlen;
 395         mcbsp_data->configured = 1;
 396
 397         return 0;
 398 }
 399
 400 /*
 401  * This must be called before _set_clkdiv and _set_sysclk since McBSP register
 402  * cache is initialized here
 403  */
 404 static int omap_mcbsp_dai_set_dai_fmt(struct snd_soc_dai *cpu_dai,
 405                                       unsigned int fmt)
 406 {
 407         struct omap_mcbsp_data *mcbsp_data = snd_soc_dai_get_drvdata(cpu_dai);
 408         struct omap_mcbsp_reg_cfg *regs = &mcbsp_data->regs;
 409         bool inv_fs = false;
 410
 411         if (mcbsp_data->configured)
 412                 return 0;
 413
 414         mcbsp_data->fmt = fmt;
 415         memset(regs, 0, sizeof(*regs));
 416         /* Generic McBSP register settings */
 417         regs->spcr2     |= XINTM(3) | FREE;
 418         regs->spcr1     |= RINTM(3);
 419         /* RFIG and XFIG are not defined in 34xx */
 420         if (!cpu_is_omap34xx() && !cpu_is_omap44xx()) {
 421                 regs->rcr2      |= RFIG;
 422                 regs->xcr2      |= XFIG;
 423         }
 424         if (cpu_is_omap2430() || cpu_is_omap34xx() || cpu_is_omap44xx()) {
 425                 regs->xccr = DXENDLY(1) | XDMAEN | XDISABLE;
 426                 regs->rccr = RFULL_CYCLE | RDMAEN | RDISABLE;
 427         }
 428
 429         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 430         case SND_SOC_DAIFMT_I2S:
 431                 /* 1-bit data delay */
 432                 regs->rcr2      |= RDATDLY(1);
 433                 regs->xcr2      |= XDATDLY(1);
 434                 break;
 435         case SND_SOC_DAIFMT_LEFT_J:
 436                 /* 0-bit data delay */
 437                 regs->rcr2      |= RDATDLY(0);
 438                 regs->xcr2      |= XDATDLY(0);
 439                 regs->spcr1     |= RJUST(2);
 440                 /* Invert FS polarity configuration */
 441                 inv_fs = true;
 442                 break;
 443         case SND_SOC_DAIFMT_DSP_A:
 444                 /* 1-bit data delay */
 445                 regs->rcr2      |= RDATDLY(1);
 446                 regs->xcr2      |= XDATDLY(1);
 447                 /* Invert FS polarity configuration */
 448                 inv_fs = true;
 449                 break;
 450         case SND_SOC_DAIFMT_DSP_B:
 451                 /* 0-bit data delay */
 452                 regs->rcr2      |= RDATDLY(0);
 453                 regs->xcr2      |= XDATDLY(0);
 454                 /* Invert FS polarity configuration */
 455                 inv_fs = true;
 456                 break;
 457         default:
 458                 /* Unsupported data format */
 459                 return -EINVAL;
 460         }
 461
 462         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 463         case SND_SOC_DAIFMT_CBS_CFS:
 464                 /* McBSP master. Set FS and bit clocks as outputs */
 465                 regs->pcr0      |= FSXM | FSRM |
 466                                    CLKXM | CLKRM;
 467                 /* Sample rate generator drives the FS */
 468                 regs->srgr2     |= FSGM;
 469                 break;
 470         case SND_SOC_DAIFMT_CBM_CFM:
 471                 /* McBSP slave */
 472                 break;
 473         default:
 474                 /* Unsupported master/slave configuration */
 475                 return -EINVAL;
 476         }
 477
 478         /* Set bit clock (CLKX/CLKR) and FS polarities */
 479         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 480         case SND_SOC_DAIFMT_NB_NF:
 481                 /*
 482                  * Normal BCLK + FS.
 483                  * FS active low. TX data driven on falling edge of bit clock
 484                  * and RX data sampled on rising edge of bit clock.
 485                  */
 486                 regs->pcr0      |= FSXP | FSRP |
 487                                    CLKXP | CLKRP;
 488                 break;
 489         case SND_SOC_DAIFMT_NB_IF:
 490                 regs->pcr0      |= CLKXP | CLKRP;
 491                 break;
 492         case SND_SOC_DAIFMT_IB_NF:
 493                 regs->pcr0      |= FSXP | FSRP;
 494                 break;
 495         case SND_SOC_DAIFMT_IB_IF:
 496                 break;
 497         default:
 498                 return -EINVAL;
 499         }
 500         if (inv_fs == true)
 501                 regs->pcr0 ^= FSXP | FSRP;
 502
 503         return 0;
 504 }
 505
 506 static int omap_mcbsp_dai_set_clkdiv(struct snd_soc_dai *cpu_dai,
 507                                      int div_id, int div)
 508 {
 509         struct omap_mcbsp_data *mcbsp_data = snd_soc_dai_get_drvdata(cpu_dai);
 510         struct omap_mcbsp_reg_cfg *regs = &mcbsp_data->regs;
 511
 512         if (div_id != OMAP_MCBSP_CLKGDV)
 513                 return -ENODEV;
 514
 515         mcbsp_data->clk_div = div;
 516         regs->srgr1     &= ~CLKGDV(0xff);
 517         regs->srgr1     |= CLKGDV(div - 1);
 518
 519         return 0;
 520 }
 521
 522 static int omap_mcbsp_dai_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
 523                                          int clk_id, unsigned int freq,
 524                                          int dir)
 525 {
 526         struct omap_mcbsp_data *mcbsp_data = snd_soc_dai_get_drvdata(cpu_dai);
 527         struct omap_mcbsp_reg_cfg *regs = &mcbsp_data->regs;
 528         int err = 0;
 529
 530         if (mcbsp_data->active) {
 531                 if (freq == mcbsp_data->in_freq)
 532                         return 0;
 533                 else
 534                         return -EBUSY;
 535         }
 536
 537         /* The McBSP signal muxing functions are only available on McBSP1 */
 538         if (clk_id == OMAP_MCBSP_CLKR_SRC_CLKR ||
 539             clk_id == OMAP_MCBSP_CLKR_SRC_CLKX ||
 540             clk_id == OMAP_MCBSP_FSR_SRC_FSR ||
 541             clk_id == OMAP_MCBSP_FSR_SRC_FSX)
 542                 if (cpu_class_is_omap1() || mcbsp_data->bus_id != 0)
 543                         return -EINVAL;
 544
 545         mcbsp_data->in_freq = freq;
 546         regs->srgr2     &= ~CLKSM;
 547         regs->pcr0      &= ~SCLKME;
 548
 549         switch (clk_id) {
 550         case OMAP_MCBSP_SYSCLK_CLK:
 551                 regs->srgr2     |= CLKSM;
 552                 break;
 553         case OMAP_MCBSP_SYSCLK_CLKS_FCLK:
 554                 if (cpu_class_is_omap1()) {
 555                         err = -EINVAL;
 556                         break;
 557                 }
 558                 err = omap2_mcbsp_set_clks_src(mcbsp_data->bus_id,
 559                                                MCBSP_CLKS_PRCM_SRC);
 560                 break;
 561         case OMAP_MCBSP_SYSCLK_CLKS_EXT:
 562                 if (cpu_class_is_omap1()) {
 563                         err = 0;
 564                         break;
 565                 }
 566                 err = omap2_mcbsp_set_clks_src(mcbsp_data->bus_id,
 567                                                MCBSP_CLKS_PAD_SRC);
 568                 break;
 569
 570         case OMAP_MCBSP_SYSCLK_CLKX_EXT:
 571                 regs->srgr2     |= CLKSM;
 572         case OMAP_MCBSP_SYSCLK_CLKR_EXT:
 573                 regs->pcr0      |= SCLKME;
 574                 break;
 575
 576
 577         case OMAP_MCBSP_CLKR_SRC_CLKR:
 578                 if (cpu_class_is_omap1())
 579                         break;
 580                 omap2_mcbsp1_mux_clkr_src(CLKR_SRC_CLKR);
 581                 break;
 582         case OMAP_MCBSP_CLKR_SRC_CLKX:
 583                 if (cpu_class_is_omap1())
 584                         break;
 585                 omap2_mcbsp1_mux_clkr_src(CLKR_SRC_CLKX);
 586                 break;
 587         case OMAP_MCBSP_FSR_SRC_FSR:
 588                 if (cpu_class_is_omap1())
 589                         break;
 590                 omap2_mcbsp1_mux_fsr_src(FSR_SRC_FSR);
 591                 break;
 592         case OMAP_MCBSP_FSR_SRC_FSX:
 593                 if (cpu_class_is_omap1())
 594                         break;
 595                 omap2_mcbsp1_mux_fsr_src(FSR_SRC_FSX);
 596                 break;
 597         default:
 598                 err = -ENODEV;
 599         }
 600
 601         return err;
 602 }
 603
 604 /*
 605  * We have to be sure there is more than FIFO size worth of data ready
 606  * before starting, or else we get underflow right after start.
 607  * XXX: To make realtime streaming work, setting this to fifo+period
 608  * as DMA uses period boundaries, there must be enough data at those.
 609  */
 610 static int omap_mcbsp_dai_prepare(struct snd_pcm_substream *substream,
 611                                   struct snd_soc_dai *cpu_dai)
 612 {
 613         struct omap_mcbsp_data *mcbsp_data = snd_soc_dai_get_drvdata(cpu_dai);
 614         struct snd_pcm_runtime *runtime = substream->runtime;
 615         int size;
 616
 617         size = omap_mcbsp_get_fifo_size(mcbsp_data->bus_id);
 618         size /= substream->runtime->channels;
 619
 620         size += bytes_to_frames(runtime, snd_pcm_lib_period_bytes(substream));
 621
 622         if (runtime->start_threshold < size) {
 623                 runtime->start_threshold = size;
 624                 if (runtime->start_threshold > runtime->buffer_size)
 625                         runtime->start_threshold = runtime->buffer_size;
 626         }
 627
 628         return 0;
 629 }
 630
 631 static struct snd_soc_dai_ops mcbsp_dai_ops = {
 632         .startup        = omap_mcbsp_dai_startup,
 633         .shutdown       = omap_mcbsp_dai_shutdown,
 634         .trigger        = omap_mcbsp_dai_trigger,
 635         .delay          = omap_mcbsp_dai_delay,
 636         .hw_params      = omap_mcbsp_dai_hw_params,
 637         .set_fmt        = omap_mcbsp_dai_set_dai_fmt,
 638         .set_clkdiv     = omap_mcbsp_dai_set_clkdiv,
 639         .set_sysclk     = omap_mcbsp_dai_set_dai_sysclk,
 640         .prepare        = omap_mcbsp_dai_prepare,
 641 };
 642
 643 static int mcbsp_dai_probe(struct snd_soc_dai *dai)
 644 {
 645         mcbsp_data[dai->id].bus_id = dai->id;
 646         snd_soc_dai_set_drvdata(dai, &mcbsp_data[dai->id].bus_id);
 647         return 0;
 648 }
 649
 650 static struct snd_soc_dai_driver omap_mcbsp_dai = {
 651         .probe = mcbsp_dai_probe,
 652         .playback = {
 653                 .channels_min = 1,
 654                 .channels_max = 16,
 655                 .rates = OMAP_MCBSP_RATES,
 656                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
 657         },
 658         .capture = {
 659                 .channels_min = 1,
 660                 .channels_max = 16,
 661                 .rates = OMAP_MCBSP_RATES,
 662                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
 663         },
 664         .ops = &mcbsp_dai_ops,
 665 };
 666
 667 static int omap_mcbsp_st_info_volsw(struct snd_kcontrol *kcontrol,
 668                         struct snd_ctl_elem_info *uinfo)
 669 {
 670         struct soc_mixer_control *mc =
 671                 (struct soc_mixer_control *)kcontrol->private_value;
 672         int max = mc->max;
 673         int min = mc->min;
 674
 675         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 676         uinfo->count = 1;
 677         uinfo->value.integer.min = min;
 678         uinfo->value.integer.max = max;
 679         return 0;
 680 }
 681
 682 #define OMAP_MCBSP_ST_SET_CHANNEL_VOLUME(id, channel)                   \
 683 static int                                                              \
 684 omap_mcbsp##id##_set_st_ch##channel##_volume(struct snd_kcontrol *kc,   \
 685                                         struct snd_ctl_elem_value *uc)  \
 686 {                                                                       \
 687         struct soc_mixer_control *mc =                                  \
 688                 (struct soc_mixer_control *)kc->private_value;          \
 689         int max = mc->max;                                              \
 690         int min = mc->min;                                              \
 691         int val = uc->value.integer.value[0];                           \
 692                                                                         \
 693         if (val < min || val > max)                                     \
 694                 return -EINVAL;                                         \
 695                                                                         \
 696         /* OMAP McBSP implementation uses index values 0..4 */          \
 697         return omap_st_set_chgain((id)-1, channel, val);                \
 698 }
 699
 700 #define OMAP_MCBSP_ST_GET_CHANNEL_VOLUME(id, channel)                   \
 701 static int                                                              \
 702 omap_mcbsp##id##_get_st_ch##channel##_volume(struct snd_kcontrol *kc,   \
 703                                         struct snd_ctl_elem_value *uc)  \
 704 {                                                                       \
 705         s16 chgain;                                                     \
 706                                                                         \
 707         if (omap_st_get_chgain((id)-1, channel, &chgain))               \
 708                 return -EAGAIN;                                         \
 709                                                                         \
 710         uc->value.integer.value[0] = chgain;                            \
 711         return 0;                                                       \
 712 }
 713
 714 OMAP_MCBSP_ST_SET_CHANNEL_VOLUME(2, 0)
 715 OMAP_MCBSP_ST_SET_CHANNEL_VOLUME(2, 1)
 716 OMAP_MCBSP_ST_SET_CHANNEL_VOLUME(3, 0)
 717 OMAP_MCBSP_ST_SET_CHANNEL_VOLUME(3, 1)
 718 OMAP_MCBSP_ST_GET_CHANNEL_VOLUME(2, 0)
 719 OMAP_MCBSP_ST_GET_CHANNEL_VOLUME(2, 1)
 720 OMAP_MCBSP_ST_GET_CHANNEL_VOLUME(3, 0)
 721 OMAP_MCBSP_ST_GET_CHANNEL_VOLUME(3, 1)
 722
 723 static int omap_mcbsp_st_put_mode(struct snd_kcontrol *kcontrol,
 724                                 struct snd_ctl_elem_value *ucontrol)
 725 {
 726         struct soc_mixer_control *mc =
 727                 (struct soc_mixer_control *)kcontrol->private_value;
 728         u8 value = ucontrol->value.integer.value[0];
 729
 730         if (value == omap_st_is_enabled(mc->reg))
 731                 return 0;
 732
 733         if (value)
 734                 omap_st_enable(mc->reg);
 735         else
 736                 omap_st_disable(mc->reg);
 737
 738         return 1;
 739 }
 740
 741 static int omap_mcbsp_st_get_mode(struct snd_kcontrol *kcontrol,
 742                                 struct snd_ctl_elem_value *ucontrol)
 743 {
 744         struct soc_mixer_control *mc =
 745                 (struct soc_mixer_control *)kcontrol->private_value;
 746
 747         ucontrol->value.integer.value[0] = omap_st_is_enabled(mc->reg);
 748         return 0;
 749 }
 750
 751 static const struct snd_kcontrol_new omap_mcbsp2_st_controls[] = {
 752         SOC_SINGLE_EXT("McBSP2 Sidetone Switch", 1, 0, 1, 0,
 753                         omap_mcbsp_st_get_mode, omap_mcbsp_st_put_mode),
 754         OMAP_MCBSP_SOC_SINGLE_S16_EXT("McBSP2 Sidetone Channel 0 Volume",
 755                                       -32768, 32767,
 756                                       omap_mcbsp2_get_st_ch0_volume,
 757                                       omap_mcbsp2_set_st_ch0_volume),
 758         OMAP_MCBSP_SOC_SINGLE_S16_EXT("McBSP2 Sidetone Channel 1 Volume",
 759                                       -32768, 32767,
 760                                       omap_mcbsp2_get_st_ch1_volume,
 761                                       omap_mcbsp2_set_st_ch1_volume),
 762 };
 763
 764 static const struct snd_kcontrol_new omap_mcbsp3_st_controls[] = {
 765         SOC_SINGLE_EXT("McBSP3 Sidetone Switch", 2, 0, 1, 0,
 766                         omap_mcbsp_st_get_mode, omap_mcbsp_st_put_mode),
 767         OMAP_MCBSP_SOC_SINGLE_S16_EXT("McBSP3 Sidetone Channel 0 Volume",
 768                                       -32768, 32767,
 769                                       omap_mcbsp3_get_st_ch0_volume,
 770                                       omap_mcbsp3_set_st_ch0_volume),
 771         OMAP_MCBSP_SOC_SINGLE_S16_EXT("McBSP3 Sidetone Channel 1 Volume",
 772                                       -32768, 32767,
 773                                       omap_mcbsp3_get_st_ch1_volume,
 774                                       omap_mcbsp3_set_st_ch1_volume),
 775 };
 776
 777 int omap_mcbsp_st_add_controls(struct snd_soc_codec *codec, int mcbsp_id)
 778 {
 779         if (!cpu_is_omap34xx())
 780                 return -ENODEV;
 781
 782         switch (mcbsp_id) {
 783         case 1: /* McBSP 2 */
 784                 return snd_soc_add_controls(codec, omap_mcbsp2_st_controls,
 785                                         ARRAY_SIZE(omap_mcbsp2_st_controls));
 786         case 2: /* McBSP 3 */
 787                 return snd_soc_add_controls(codec, omap_mcbsp3_st_controls,
 788                                         ARRAY_SIZE(omap_mcbsp3_st_controls));
 789         default:
 790                 break;
 791         }
 792
 793         return -EINVAL;
 794 }
 795 EXPORT_SYMBOL_GPL(omap_mcbsp_st_add_controls);
 796
 797 static __devinit int asoc_mcbsp_probe(struct platform_device *pdev)
 798 {
 799         return snd_soc_register_dai(&pdev->dev, &omap_mcbsp_dai);
 800 }
 801
 802 static int __devexit asoc_mcbsp_remove(struct platform_device *pdev)
 803 {
 804         snd_soc_unregister_dai(&pdev->dev);
 805         return 0;
 806 }
 807
 808 static struct platform_driver asoc_mcbsp_driver = {
 809         .driver = {
 810                         .name = "omap-mcbsp-dai",
 811                         .owner = THIS_MODULE,
 812         },
 813
 814         .probe = asoc_mcbsp_probe,
 815         .remove = __devexit_p(asoc_mcbsp_remove),
 816 };
 817
 818 static int __init snd_omap_mcbsp_init(void)
 819 {
 820         return platform_driver_register(&asoc_mcbsp_driver);
 821 }
 822 module_init(snd_omap_mcbsp_init);
 823
 824 static void __exit snd_omap_mcbsp_exit(void)
 825 {
 826         platform_driver_unregister(&asoc_mcbsp_driver);
 827 }
 828 module_exit(snd_omap_mcbsp_exit);
 829
 830 MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@bitmer.com>");
 831 MODULE_DESCRIPTION("OMAP I2S SoC Interface");
 832 MODULE_LICENSE("GPL");