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 <linux/pm_runtime.h>
  29 #include <linux/of.h>
  30 #include <linux/of_device.h>
  31 #include <sound/core.h>
  32 #include <sound/pcm.h>
  33 #include <sound/pcm_params.h>
  34 #include <sound/initval.h>
  35 #include <sound/soc.h>
  36 #include <sound/dmaengine_pcm.h>
  37 #include <sound/omap-pcm.h>
  38
  39 #include <linux/platform_data/asoc-ti-mcbsp.h>
  40 #include "mcbsp.h"
  41 #include "omap-mcbsp.h"
  42
  43 #define OMAP_MCBSP_RATES        (SNDRV_PCM_RATE_8000_96000)
  44
  45 #define OMAP_MCBSP_SOC_SINGLE_S16_EXT(xname, xmin, xmax, \
  46         xhandler_get, xhandler_put) \
  47 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
  48         .info = omap_mcbsp_st_info_volsw, \
  49         .get = xhandler_get, .put = xhandler_put, \
  50         .private_value = (unsigned long) &(struct soc_mixer_control) \
  51         {.min = xmin, .max = xmax} }
  52
  53 enum {
  54         OMAP_MCBSP_WORD_8 = 0,
  55         OMAP_MCBSP_WORD_12,
  56         OMAP_MCBSP_WORD_16,
  57         OMAP_MCBSP_WORD_20,
  58         OMAP_MCBSP_WORD_24,
  59         OMAP_MCBSP_WORD_32,
  60 };
  61
  62 /*
  63  * Stream DMA parameters. DMA request line and port address are set runtime
  64  * since they are different between OMAP1 and later OMAPs
  65  */
  66 static void omap_mcbsp_set_threshold(struct snd_pcm_substream *substream,
  67                 unsigned int packet_size)
  68 {
  69         struct snd_soc_pcm_runtime *rtd = substream->private_data;
  70         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
  71         struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
  72         int words;
  73
  74         /*
  75          * Configure McBSP threshold based on either:
  76          * packet_size, when the sDMA is in packet mode, or based on the
  77          * period size in THRESHOLD mode, otherwise use McBSP threshold = 1
  78          * for mono streams.
  79          */
  80         if (packet_size)
  81                 words = packet_size;
  82         else
  83                 words = 1;
  84
  85         /* Configure McBSP internal buffer usage */
  86         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
  87                 omap_mcbsp_set_tx_threshold(mcbsp, words);
  88         else
  89                 omap_mcbsp_set_rx_threshold(mcbsp, words);
  90 }
  91
  92 static int omap_mcbsp_hwrule_min_buffersize(struct snd_pcm_hw_params *params,
  93                                     struct snd_pcm_hw_rule *rule)
  94 {
  95         struct snd_interval *buffer_size = hw_param_interval(params,
  96                                         SNDRV_PCM_HW_PARAM_BUFFER_SIZE);
  97         struct snd_interval *channels = hw_param_interval(params,
  98                                         SNDRV_PCM_HW_PARAM_CHANNELS);
  99         struct omap_mcbsp *mcbsp = rule->private;
 100         struct snd_interval frames;
 101         int size;
 102
 103         snd_interval_any(&frames);
 104         size = mcbsp->pdata->buffer_size;
 105
 106         frames.min = size / channels->min;
 107         frames.integer = 1;
 108         return snd_interval_refine(buffer_size, &frames);
 109 }
 110
 111 static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream,
 112                                   struct snd_soc_dai *cpu_dai)
 113 {
 114         struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
 115         int err = 0;
 116
 117         if (!cpu_dai->active)
 118                 err = omap_mcbsp_request(mcbsp);
 119
 120         /*
 121          * OMAP3 McBSP FIFO is word structured.
 122          * McBSP2 has 1024 + 256 = 1280 word long buffer,
 123          * McBSP1,3,4,5 has 128 word long buffer
 124          * This means that the size of the FIFO depends on the sample format.
 125          * For example on McBSP3:
 126          * 16bit samples: size is 128 * 2 = 256 bytes
 127          * 32bit samples: size is 128 * 4 = 512 bytes
 128          * It is simpler to place constraint for buffer and period based on
 129          * channels.
 130          * McBSP3 as example again (16 or 32 bit samples):
 131          * 1 channel (mono): size is 128 frames (128 words)
 132          * 2 channels (stereo): size is 128 / 2 = 64 frames (2 * 64 words)
 133          * 4 channels: size is 128 / 4 = 32 frames (4 * 32 words)
 134          */
 135         if (mcbsp->pdata->buffer_size) {
 136                 /*
 137                 * Rule for the buffer size. We should not allow
 138                 * smaller buffer than the FIFO size to avoid underruns.
 139                 * This applies only for the playback stream.
 140                 */
 141                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 142                         snd_pcm_hw_rule_add(substream->runtime, 0,
 143                                             SNDRV_PCM_HW_PARAM_BUFFER_SIZE,
 144                                             omap_mcbsp_hwrule_min_buffersize,
 145                                             mcbsp,
 146                                             SNDRV_PCM_HW_PARAM_CHANNELS, -1);
 147
 148                 /* Make sure, that the period size is always even */
 149                 snd_pcm_hw_constraint_step(substream->runtime, 0,
 150                                            SNDRV_PCM_HW_PARAM_PERIOD_SIZE, 2);
 151         }
 152
 153         return err;
 154 }
 155
 156 static void omap_mcbsp_dai_shutdown(struct snd_pcm_substream *substream,
 157                                     struct snd_soc_dai *cpu_dai)
 158 {
 159         struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
 160
 161         if (!cpu_dai->active) {
 162                 omap_mcbsp_free(mcbsp);
 163                 mcbsp->configured = 0;
 164         }
 165 }
 166
 167 static int omap_mcbsp_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 168                                   struct snd_soc_dai *cpu_dai)
 169 {
 170         struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
 171         int err = 0, play = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
 172
 173         switch (cmd) {
 174         case SNDRV_PCM_TRIGGER_START:
 175         case SNDRV_PCM_TRIGGER_RESUME:
 176         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 177                 mcbsp->active++;
 178                 omap_mcbsp_start(mcbsp, play, !play);
 179                 break;
 180
 181         case SNDRV_PCM_TRIGGER_STOP:
 182         case SNDRV_PCM_TRIGGER_SUSPEND:
 183         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 184                 omap_mcbsp_stop(mcbsp, play, !play);
 185                 mcbsp->active--;
 186                 break;
 187         default:
 188                 err = -EINVAL;
 189         }
 190
 191         return err;
 192 }
 193
 194 static snd_pcm_sframes_t omap_mcbsp_dai_delay(
 195                         struct snd_pcm_substream *substream,
 196                         struct snd_soc_dai *dai)
 197 {
 198         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 199         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 200         struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
 201         u16 fifo_use;
 202         snd_pcm_sframes_t delay;
 203
 204         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 205                 fifo_use = omap_mcbsp_get_tx_delay(mcbsp);
 206         else
 207                 fifo_use = omap_mcbsp_get_rx_delay(mcbsp);
 208
 209         /*
 210          * Divide the used locations with the channel count to get the
 211          * FIFO usage in samples (don't care about partial samples in the
 212          * buffer).
 213          */
 214         delay = fifo_use / substream->runtime->channels;
 215
 216         return delay;
 217 }
 218
 219 static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream,
 220                                     struct snd_pcm_hw_params *params,
 221                                     struct snd_soc_dai *cpu_dai)
 222 {
 223         struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
 224         struct omap_mcbsp_reg_cfg *regs = &mcbsp->cfg_regs;
 225         struct snd_dmaengine_dai_dma_data *dma_data;
 226         int wlen, channels, wpf;
 227         int pkt_size = 0;
 228         unsigned int format, div, framesize, master;
 229
 230         dma_data = snd_soc_dai_get_dma_data(cpu_dai, substream);
 231         channels = params_channels(params);
 232
 233         switch (params_format(params)) {
 234         case SNDRV_PCM_FORMAT_S16_LE:
 235                 wlen = 16;
 236                 break;
 237         case SNDRV_PCM_FORMAT_S32_LE:
 238                 wlen = 32;
 239                 break;
 240         default:
 241                 return -EINVAL;
 242         }
 243         if (mcbsp->pdata->buffer_size) {
 244                 if (mcbsp->dma_op_mode == MCBSP_DMA_MODE_THRESHOLD) {
 245                         int period_words, max_thrsh;
 246                         int divider = 0;
 247
 248                         period_words = params_period_bytes(params) / (wlen / 8);
 249                         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 250                                 max_thrsh = mcbsp->max_tx_thres;
 251                         else
 252                                 max_thrsh = mcbsp->max_rx_thres;
 253                         /*
 254                          * Use sDMA packet mode if McBSP is in threshold mode:
 255                          * If period words less than the FIFO size the packet
 256                          * size is set to the number of period words, otherwise
 257                          * Look for the biggest threshold value which divides
 258                          * the period size evenly.
 259                          */
 260                         divider = period_words / max_thrsh;
 261                         if (period_words % max_thrsh)
 262                                 divider++;
 263                         while (period_words % divider &&
 264                                 divider < period_words)
 265                                 divider++;
 266                         if (divider == period_words)
 267                                 return -EINVAL;
 268
 269                         pkt_size = period_words / divider;
 270                 } else if (channels > 1) {
 271                         /* Use packet mode for non mono streams */
 272                         pkt_size = channels;
 273                 }
 274                 omap_mcbsp_set_threshold(substream, pkt_size);
 275         }
 276
 277         dma_data->maxburst = pkt_size;
 278
 279         if (mcbsp->configured) {
 280                 /* McBSP already configured by another stream */
 281                 return 0;
 282         }
 283
 284         regs->rcr2      &= ~(RPHASE | RFRLEN2(0x7f) | RWDLEN2(7));
 285         regs->xcr2      &= ~(RPHASE | XFRLEN2(0x7f) | XWDLEN2(7));
 286         regs->rcr1      &= ~(RFRLEN1(0x7f) | RWDLEN1(7));
 287         regs->xcr1      &= ~(XFRLEN1(0x7f) | XWDLEN1(7));
 288         format = mcbsp->fmt & SND_SOC_DAIFMT_FORMAT_MASK;
 289         wpf = channels;
 290         if (channels == 2 && (format == SND_SOC_DAIFMT_I2S ||
 291                               format == SND_SOC_DAIFMT_LEFT_J)) {
 292                 /* Use dual-phase frames */
 293                 regs->rcr2      |= RPHASE;
 294                 regs->xcr2      |= XPHASE;
 295                 /* Set 1 word per (McBSP) frame for phase1 and phase2 */
 296                 wpf--;
 297                 regs->rcr2      |= RFRLEN2(wpf - 1);
 298                 regs->xcr2      |= XFRLEN2(wpf - 1);
 299         }
 300
 301         regs->rcr1      |= RFRLEN1(wpf - 1);
 302         regs->xcr1      |= XFRLEN1(wpf - 1);
 303
 304         switch (params_format(params)) {
 305         case SNDRV_PCM_FORMAT_S16_LE:
 306                 /* Set word lengths */
 307                 regs->rcr2      |= RWDLEN2(OMAP_MCBSP_WORD_16);
 308                 regs->rcr1      |= RWDLEN1(OMAP_MCBSP_WORD_16);
 309                 regs->xcr2      |= XWDLEN2(OMAP_MCBSP_WORD_16);
 310                 regs->xcr1      |= XWDLEN1(OMAP_MCBSP_WORD_16);
 311                 break;
 312         case SNDRV_PCM_FORMAT_S32_LE:
 313                 /* Set word lengths */
 314                 regs->rcr2      |= RWDLEN2(OMAP_MCBSP_WORD_32);
 315                 regs->rcr1      |= RWDLEN1(OMAP_MCBSP_WORD_32);
 316                 regs->xcr2      |= XWDLEN2(OMAP_MCBSP_WORD_32);
 317                 regs->xcr1      |= XWDLEN1(OMAP_MCBSP_WORD_32);
 318                 break;
 319         default:
 320                 /* Unsupported PCM format */
 321                 return -EINVAL;
 322         }
 323
 324         /* In McBSP master modes, FRAME (i.e. sample rate) is generated
 325          * by _counting_ BCLKs. Calculate frame size in BCLKs */
 326         master = mcbsp->fmt & SND_SOC_DAIFMT_MASTER_MASK;
 327         if (master ==   SND_SOC_DAIFMT_CBS_CFS) {
 328                 div = mcbsp->clk_div ? mcbsp->clk_div : 1;
 329                 framesize = (mcbsp->in_freq / div) / params_rate(params);
 330
 331                 if (framesize < wlen * channels) {
 332                         printk(KERN_ERR "%s: not enough bandwidth for desired rate and "
 333                                         "channels\n", __func__);
 334                         return -EINVAL;
 335                 }
 336         } else
 337                 framesize = wlen * channels;
 338
 339         /* Set FS period and length in terms of bit clock periods */
 340         regs->srgr2     &= ~FPER(0xfff);
 341         regs->srgr1     &= ~FWID(0xff);
 342         switch (format) {
 343         case SND_SOC_DAIFMT_I2S:
 344         case SND_SOC_DAIFMT_LEFT_J:
 345                 regs->srgr2     |= FPER(framesize - 1);
 346                 regs->srgr1     |= FWID((framesize >> 1) - 1);
 347                 break;
 348         case SND_SOC_DAIFMT_DSP_A:
 349         case SND_SOC_DAIFMT_DSP_B:
 350                 regs->srgr2     |= FPER(framesize - 1);
 351                 regs->srgr1     |= FWID(0);
 352                 break;
 353         }
 354
 355         omap_mcbsp_config(mcbsp, &mcbsp->cfg_regs);
 356         mcbsp->wlen = wlen;
 357         mcbsp->configured = 1;
 358
 359         return 0;
 360 }
 361
 362 /*
 363  * This must be called before _set_clkdiv and _set_sysclk since McBSP register
 364  * cache is initialized here
 365  */
 366 static int omap_mcbsp_dai_set_dai_fmt(struct snd_soc_dai *cpu_dai,
 367                                       unsigned int fmt)
 368 {
 369         struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
 370         struct omap_mcbsp_reg_cfg *regs = &mcbsp->cfg_regs;
 371         bool inv_fs = false;
 372
 373         if (mcbsp->configured)
 374                 return 0;
 375
 376         mcbsp->fmt = fmt;
 377         memset(regs, 0, sizeof(*regs));
 378         /* Generic McBSP register settings */
 379         regs->spcr2     |= XINTM(3) | FREE;
 380         regs->spcr1     |= RINTM(3);
 381         /* RFIG and XFIG are not defined in 2430 and on OMAP3+ */
 382         if (!mcbsp->pdata->has_ccr) {
 383                 regs->rcr2      |= RFIG;
 384                 regs->xcr2      |= XFIG;
 385         }
 386
 387         /* Configure XCCR/RCCR only for revisions which have ccr registers */
 388         if (mcbsp->pdata->has_ccr) {
 389                 regs->xccr = DXENDLY(1) | XDMAEN | XDISABLE;
 390                 regs->rccr = RFULL_CYCLE | RDMAEN | RDISABLE;
 391         }
 392
 393         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 394         case SND_SOC_DAIFMT_I2S:
 395                 /* 1-bit data delay */
 396                 regs->rcr2      |= RDATDLY(1);
 397                 regs->xcr2      |= XDATDLY(1);
 398                 break;
 399         case SND_SOC_DAIFMT_LEFT_J:
 400                 /* 0-bit data delay */
 401                 regs->rcr2      |= RDATDLY(0);
 402                 regs->xcr2      |= XDATDLY(0);
 403                 regs->spcr1     |= RJUST(2);
 404                 /* Invert FS polarity configuration */
 405                 inv_fs = true;
 406                 break;
 407         case SND_SOC_DAIFMT_DSP_A:
 408                 /* 1-bit data delay */
 409                 regs->rcr2      |= RDATDLY(1);
 410                 regs->xcr2      |= XDATDLY(1);
 411                 /* Invert FS polarity configuration */
 412                 inv_fs = true;
 413                 break;
 414         case SND_SOC_DAIFMT_DSP_B:
 415                 /* 0-bit data delay */
 416                 regs->rcr2      |= RDATDLY(0);
 417                 regs->xcr2      |= XDATDLY(0);
 418                 /* Invert FS polarity configuration */
 419                 inv_fs = true;
 420                 break;
 421         default:
 422                 /* Unsupported data format */
 423                 return -EINVAL;
 424         }
 425
 426         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 427         case SND_SOC_DAIFMT_CBS_CFS:
 428                 /* McBSP master. Set FS and bit clocks as outputs */
 429                 regs->pcr0      |= FSXM | FSRM |
 430                                    CLKXM | CLKRM;
 431                 /* Sample rate generator drives the FS */
 432                 regs->srgr2     |= FSGM;
 433                 break;
 434         case SND_SOC_DAIFMT_CBM_CFS:
 435                 /* McBSP slave. FS clock as output */
 436                 regs->srgr2     |= FSGM;
 437                 regs->pcr0      |= FSXM;
 438                 break;
 439         case SND_SOC_DAIFMT_CBM_CFM:
 440                 /* McBSP slave */
 441                 break;
 442         default:
 443                 /* Unsupported master/slave configuration */
 444                 return -EINVAL;
 445         }
 446
 447         /* Set bit clock (CLKX/CLKR) and FS polarities */
 448         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 449         case SND_SOC_DAIFMT_NB_NF:
 450                 /*
 451                  * Normal BCLK + FS.
 452                  * FS active low. TX data driven on falling edge of bit clock
 453                  * and RX data sampled on rising edge of bit clock.
 454                  */
 455                 regs->pcr0      |= FSXP | FSRP |
 456                                    CLKXP | CLKRP;
 457                 break;
 458         case SND_SOC_DAIFMT_NB_IF:
 459                 regs->pcr0      |= CLKXP | CLKRP;
 460                 break;
 461         case SND_SOC_DAIFMT_IB_NF:
 462                 regs->pcr0      |= FSXP | FSRP;
 463                 break;
 464         case SND_SOC_DAIFMT_IB_IF:
 465                 break;
 466         default:
 467                 return -EINVAL;
 468         }
 469         if (inv_fs == true)
 470                 regs->pcr0 ^= FSXP | FSRP;
 471
 472         return 0;
 473 }
 474
 475 static int omap_mcbsp_dai_set_clkdiv(struct snd_soc_dai *cpu_dai,
 476                                      int div_id, int div)
 477 {
 478         struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
 479         struct omap_mcbsp_reg_cfg *regs = &mcbsp->cfg_regs;
 480
 481         if (div_id != OMAP_MCBSP_CLKGDV)
 482                 return -ENODEV;
 483
 484         mcbsp->clk_div = div;
 485         regs->srgr1     &= ~CLKGDV(0xff);
 486         regs->srgr1     |= CLKGDV(div - 1);
 487
 488         return 0;
 489 }
 490
 491 static int omap_mcbsp_dai_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
 492                                          int clk_id, unsigned int freq,
 493                                          int dir)
 494 {
 495         struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
 496         struct omap_mcbsp_reg_cfg *regs = &mcbsp->cfg_regs;
 497         int err = 0;
 498
 499         if (mcbsp->active) {
 500                 if (freq == mcbsp->in_freq)
 501                         return 0;
 502                 else
 503                         return -EBUSY;
 504         }
 505
 506         mcbsp->in_freq = freq;
 507         regs->srgr2 &= ~CLKSM;
 508         regs->pcr0 &= ~SCLKME;
 509
 510         switch (clk_id) {
 511         case OMAP_MCBSP_SYSCLK_CLK:
 512                 regs->srgr2     |= CLKSM;
 513                 break;
 514         case OMAP_MCBSP_SYSCLK_CLKS_FCLK:
 515                 if (mcbsp_omap1()) {
 516                         err = -EINVAL;
 517                         break;
 518                 }
 519                 err = omap2_mcbsp_set_clks_src(mcbsp,
 520                                                MCBSP_CLKS_PRCM_SRC);
 521                 break;
 522         case OMAP_MCBSP_SYSCLK_CLKS_EXT:
 523                 if (mcbsp_omap1()) {
 524                         err = 0;
 525                         break;
 526                 }
 527                 err = omap2_mcbsp_set_clks_src(mcbsp,
 528                                                MCBSP_CLKS_PAD_SRC);
 529                 break;
 530
 531         case OMAP_MCBSP_SYSCLK_CLKX_EXT:
 532                 regs->srgr2     |= CLKSM;
 533         case OMAP_MCBSP_SYSCLK_CLKR_EXT:
 534                 regs->pcr0      |= SCLKME;
 535                 break;
 536         default:
 537                 err = -ENODEV;
 538         }
 539
 540         return err;
 541 }
 542
 543 static const struct snd_soc_dai_ops mcbsp_dai_ops = {
 544         .startup        = omap_mcbsp_dai_startup,
 545         .shutdown       = omap_mcbsp_dai_shutdown,
 546         .trigger        = omap_mcbsp_dai_trigger,
 547         .delay          = omap_mcbsp_dai_delay,
 548         .hw_params      = omap_mcbsp_dai_hw_params,
 549         .set_fmt        = omap_mcbsp_dai_set_dai_fmt,
 550         .set_clkdiv     = omap_mcbsp_dai_set_clkdiv,
 551         .set_sysclk     = omap_mcbsp_dai_set_dai_sysclk,
 552 };
 553
 554 static int omap_mcbsp_probe(struct snd_soc_dai *dai)
 555 {
 556         struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(dai);
 557
 558         pm_runtime_enable(mcbsp->dev);
 559
 560         snd_soc_dai_init_dma_data(dai,
 561                                   &mcbsp->dma_data[SNDRV_PCM_STREAM_PLAYBACK],
 562                                   &mcbsp->dma_data[SNDRV_PCM_STREAM_CAPTURE]);
 563
 564         return 0;
 565 }
 566
 567 static int omap_mcbsp_remove(struct snd_soc_dai *dai)
 568 {
 569         struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(dai);
 570
 571         pm_runtime_disable(mcbsp->dev);
 572
 573         return 0;
 574 }
 575
 576 static struct snd_soc_dai_driver omap_mcbsp_dai = {
 577         .probe = omap_mcbsp_probe,
 578         .remove = omap_mcbsp_remove,
 579         .playback = {
 580                 .channels_min = 1,
 581                 .channels_max = 16,
 582                 .rates = OMAP_MCBSP_RATES,
 583                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
 584         },
 585         .capture = {
 586                 .channels_min = 1,
 587                 .channels_max = 16,
 588                 .rates = OMAP_MCBSP_RATES,
 589                 .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE,
 590         },
 591         .ops = &mcbsp_dai_ops,
 592 };
 593
 594 static const struct snd_soc_component_driver omap_mcbsp_component = {
 595         .name           = "omap-mcbsp",
 596 };
 597
 598 static int omap_mcbsp_st_info_volsw(struct snd_kcontrol *kcontrol,
 599                         struct snd_ctl_elem_info *uinfo)
 600 {
 601         struct soc_mixer_control *mc =
 602                 (struct soc_mixer_control *)kcontrol->private_value;
 603         int max = mc->max;
 604         int min = mc->min;
 605
 606         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 607         uinfo->count = 1;
 608         uinfo->value.integer.min = min;
 609         uinfo->value.integer.max = max;
 610         return 0;
 611 }
 612
 613 #define OMAP_MCBSP_ST_CHANNEL_VOLUME(channel)                           \
 614 static int                                                              \
 615 omap_mcbsp_set_st_ch##channel##_volume(struct snd_kcontrol *kc,         \
 616                                         struct snd_ctl_elem_value *uc)  \
 617 {                                                                       \
 618         struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kc);            \
 619         struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);    \
 620         struct soc_mixer_control *mc =                                  \
 621                 (struct soc_mixer_control *)kc->private_value;          \
 622         int max = mc->max;                                              \
 623         int min = mc->min;                                              \
 624         int val = uc->value.integer.value[0];                           \
 625                                                                         \
 626         if (val < min || val > max)                                     \
 627                 return -EINVAL;                                         \
 628                                                                         \
 629         /* OMAP McBSP implementation uses index values 0..4 */          \
 630         return omap_st_set_chgain(mcbsp, channel, val);                 \
 631 }                                                                       \
 632                                                                         \
 633 static int                                                              \
 634 omap_mcbsp_get_st_ch##channel##_volume(struct snd_kcontrol *kc,         \
 635                                         struct snd_ctl_elem_value *uc)  \
 636 {                                                                       \
 637         struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kc);            \
 638         struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);    \
 639         s16 chgain;                                                     \
 640                                                                         \
 641         if (omap_st_get_chgain(mcbsp, channel, &chgain))                \
 642                 return -EAGAIN;                                         \
 643                                                                         \
 644         uc->value.integer.value[0] = chgain;                            \
 645         return 0;                                                       \
 646 }
 647
 648 OMAP_MCBSP_ST_CHANNEL_VOLUME(0)
 649 OMAP_MCBSP_ST_CHANNEL_VOLUME(1)
 650
 651 static int omap_mcbsp_st_put_mode(struct snd_kcontrol *kcontrol,
 652                                 struct snd_ctl_elem_value *ucontrol)
 653 {
 654         struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
 655         struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
 656         u8 value = ucontrol->value.integer.value[0];
 657
 658         if (value == omap_st_is_enabled(mcbsp))
 659                 return 0;
 660
 661         if (value)
 662                 omap_st_enable(mcbsp);
 663         else
 664                 omap_st_disable(mcbsp);
 665
 666         return 1;
 667 }
 668
 669 static int omap_mcbsp_st_get_mode(struct snd_kcontrol *kcontrol,
 670                                 struct snd_ctl_elem_value *ucontrol)
 671 {
 672         struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
 673         struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
 674
 675         ucontrol->value.integer.value[0] = omap_st_is_enabled(mcbsp);
 676         return 0;
 677 }
 678
 679 #define OMAP_MCBSP_ST_CONTROLS(port)                                      \
 680 static const struct snd_kcontrol_new omap_mcbsp##port##_st_controls[] = { \
 681 SOC_SINGLE_EXT("McBSP" #port " Sidetone Switch", 1, 0, 1, 0,              \
 682                omap_mcbsp_st_get_mode, omap_mcbsp_st_put_mode),           \
 683 OMAP_MCBSP_SOC_SINGLE_S16_EXT("McBSP" #port " Sidetone Channel 0 Volume", \
 684                               -32768, 32767,                              \
 685                               omap_mcbsp_get_st_ch0_volume,               \
 686                               omap_mcbsp_set_st_ch0_volume),              \
 687 OMAP_MCBSP_SOC_SINGLE_S16_EXT("McBSP" #port " Sidetone Channel 1 Volume", \
 688                               -32768, 32767,                              \
 689                               omap_mcbsp_get_st_ch1_volume,               \
 690                               omap_mcbsp_set_st_ch1_volume),              \
 691 }
 692
 693 OMAP_MCBSP_ST_CONTROLS(2);
 694 OMAP_MCBSP_ST_CONTROLS(3);
 695
 696 int omap_mcbsp_st_add_controls(struct snd_soc_pcm_runtime *rtd, int port_id)
 697 {
 698         struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
 699         struct omap_mcbsp *mcbsp = snd_soc_dai_get_drvdata(cpu_dai);
 700
 701         if (!mcbsp->st_data) {
 702                 dev_warn(mcbsp->dev, "No sidetone data for port\n");
 703                 return 0;
 704         }
 705
 706         switch (port_id) {
 707         case 2: /* McBSP 2 */
 708                 return snd_soc_add_dai_controls(cpu_dai,
 709                                         omap_mcbsp2_st_controls,
 710                                         ARRAY_SIZE(omap_mcbsp2_st_controls));
 711         case 3: /* McBSP 3 */
 712                 return snd_soc_add_dai_controls(cpu_dai,
 713                                         omap_mcbsp3_st_controls,
 714                                         ARRAY_SIZE(omap_mcbsp3_st_controls));
 715         default:
 716                 dev_err(mcbsp->dev, "Port %d not supported\n", port_id);
 717                 break;
 718         }
 719
 720         return -EINVAL;
 721 }
 722 EXPORT_SYMBOL_GPL(omap_mcbsp_st_add_controls);
 723
 724 static struct omap_mcbsp_platform_data omap2420_pdata = {
 725         .reg_step = 4,
 726         .reg_size = 2,
 727 };
 728
 729 static struct omap_mcbsp_platform_data omap2430_pdata = {
 730         .reg_step = 4,
 731         .reg_size = 4,
 732         .has_ccr = true,
 733 };
 734
 735 static struct omap_mcbsp_platform_data omap3_pdata = {
 736         .reg_step = 4,
 737         .reg_size = 4,
 738         .has_ccr = true,
 739         .has_wakeup = true,
 740 };
 741
 742 static struct omap_mcbsp_platform_data omap4_pdata = {
 743         .reg_step = 4,
 744         .reg_size = 4,
 745         .has_ccr = true,
 746         .has_wakeup = true,
 747 };
 748
 749 static const struct of_device_id omap_mcbsp_of_match[] = {
 750         {
 751                 .compatible = "ti,omap2420-mcbsp",
 752                 .data = &omap2420_pdata,
 753         },
 754         {
 755                 .compatible = "ti,omap2430-mcbsp",
 756                 .data = &omap2430_pdata,
 757         },
 758         {
 759                 .compatible = "ti,omap3-mcbsp",
 760                 .data = &omap3_pdata,
 761         },
 762         {
 763                 .compatible = "ti,omap4-mcbsp",
 764                 .data = &omap4_pdata,
 765         },
 766         { },
 767 };
 768 MODULE_DEVICE_TABLE(of, omap_mcbsp_of_match);
 769
 770 static int asoc_mcbsp_probe(struct platform_device *pdev)
 771 {
 772         struct omap_mcbsp_platform_data *pdata = dev_get_platdata(&pdev->dev);
 773         struct omap_mcbsp *mcbsp;
 774         const struct of_device_id *match;
 775         int ret;
 776
 777         match = of_match_device(omap_mcbsp_of_match, &pdev->dev);
 778         if (match) {
 779                 struct device_node *node = pdev->dev.of_node;
 780                 int buffer_size;
 781
 782                 pdata = devm_kzalloc(&pdev->dev,
 783                                      sizeof(struct omap_mcbsp_platform_data),
 784                                      GFP_KERNEL);
 785                 if (!pdata)
 786                         return -ENOMEM;
 787
 788                 memcpy(pdata, match->data, sizeof(*pdata));
 789                 if (!of_property_read_u32(node, "ti,buffer-size", &buffer_size))
 790                         pdata->buffer_size = buffer_size;
 791         } else if (!pdata) {
 792                 dev_err(&pdev->dev, "missing platform data.\n");
 793                 return -EINVAL;
 794         }
 795         mcbsp = devm_kzalloc(&pdev->dev, sizeof(struct omap_mcbsp), GFP_KERNEL);
 796         if (!mcbsp)
 797                 return -ENOMEM;
 798
 799         mcbsp->id = pdev->id;
 800         mcbsp->pdata = pdata;
 801         mcbsp->dev = &pdev->dev;
 802         platform_set_drvdata(pdev, mcbsp);
 803
 804         ret = omap_mcbsp_init(pdev);
 805         if (ret)
 806                 return ret;
 807
 808         ret = devm_snd_soc_register_component(&pdev->dev,
 809                                               &omap_mcbsp_component,
 810                                               &omap_mcbsp_dai, 1);
 811         if (ret)
 812                 return ret;
 813
 814         return omap_pcm_platform_register(&pdev->dev);
 815 }
 816
 817 static int asoc_mcbsp_remove(struct platform_device *pdev)
 818 {
 819         struct omap_mcbsp *mcbsp = platform_get_drvdata(pdev);
 820
 821         if (mcbsp->pdata->ops && mcbsp->pdata->ops->free)
 822                 mcbsp->pdata->ops->free(mcbsp->id);
 823
 824         omap_mcbsp_sysfs_remove(mcbsp);
 825
 826         clk_put(mcbsp->fclk);
 827
 828         return 0;
 829 }
 830
 831 static struct platform_driver asoc_mcbsp_driver = {
 832         .driver = {
 833                         .name = "omap-mcbsp",
 834                         .owner = THIS_MODULE,
 835                         .of_match_table = omap_mcbsp_of_match,
 836         },
 837
 838         .probe = asoc_mcbsp_probe,
 839         .remove = asoc_mcbsp_remove,
 840 };
 841
 842 module_platform_driver(asoc_mcbsp_driver);
 843
 844 MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@bitmer.com>");
 845 MODULE_DESCRIPTION("OMAP I2S SoC Interface");
 846 MODULE_LICENSE("GPL");
 847 MODULE_ALIAS("platform:omap-mcbsp");