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