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