sound/soc/omap/omap-mcbsp.c

   1 /*
   2  * omap-mcbsp.c  --  OMAP ALSA SoC DAI driver using McBSP port
   3  *
   4  * Copyright (C) 2008 Nokia Corporation
   5  *
   6  * Contact: Jarkko Nikula <jhnikula@gmail.com>
   7  *          Peter Ujfalusi <peter.ujfalusi@nokia.com>
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License
  11  * version 2 as published by the Free Software Foundation.
  12  *
  13  * This program is distributed in the hope that it will be useful, but
  14  * WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  16  * General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  21  * 02110-1301 USA
  22  *
  23  */
  24
  25 #include <linux/init.h>
  26 #include <linux/module.h>
  27 #include <linux/device.h>
  28 #include <sound/core.h>
  29 #include <sound/pcm.h>
  30 #include <sound/pcm_params.h>
  31 #include <sound/initval.h>
  32 #include <sound/soc.h>
  33
  34 #include <plat/control.h>
  35 #include <plat/dma.h>
  36 #include <plat/mcbsp.h>
  37 #include "omap-mcbsp.h"
  38 #include "omap-pcm.h"
  39
  40 #define OMAP_MCBSP_RATES        (SNDRV_PCM_RATE_8000_96000)
  41
  42 #define OMAP_MCBSP_SOC_SINGLE_S16_EXT(xname, xmin, xmax, \
  43         xhandler_get, xhandler_put) \
  44 {       .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
  45         .info = omap_mcbsp_st_info_volsw, \
  46         .get = xhandler_get, .put = xhandler_put, \
  47         .private_value = (unsigned long) &(struct soc_mixer_control) \
  48         {.min = xmin, .max = xmax} }
  49
  50 struct omap_mcbsp_data {
  51         unsigned int                    bus_id;
  52         struct omap_mcbsp_reg_cfg       regs;
  53         unsigned int                    fmt;
  54         /*
  55          * Flags indicating is the bus already activated and configured by
  56          * another substream
  57          */
  58         int                             active;
  59         int                             configured;
  60         unsigned int                    in_freq;
  61         int                             clk_div;
  62 };
  63
  64 #define to_mcbsp(priv)  container_of((priv), struct omap_mcbsp_data, bus_id)
  65
  66 static struct omap_mcbsp_data mcbsp_data[NUM_LINKS];
  67
  68 /*
  69  * Stream DMA parameters. DMA request line and port address are set runtime
  70  * since they are different between OMAP1 and later OMAPs
  71  */
  72 static struct omap_pcm_dma_data omap_mcbsp_dai_dma_params[NUM_LINKS][2];
  73
  74 #if defined(CONFIG_ARCH_OMAP15XX) || defined(CONFIG_ARCH_OMAP16XX)
  75 static const int omap1_dma_reqs[][2] = {
  76         { OMAP_DMA_MCBSP1_TX, OMAP_DMA_MCBSP1_RX },
  77         { OMAP_DMA_MCBSP2_TX, OMAP_DMA_MCBSP2_RX },
  78         { OMAP_DMA_MCBSP3_TX, OMAP_DMA_MCBSP3_RX },
  79 };
  80 static const unsigned long omap1_mcbsp_port[][2] = {
  81         { OMAP1510_MCBSP1_BASE + OMAP_MCBSP_REG_DXR1,
  82           OMAP1510_MCBSP1_BASE + OMAP_MCBSP_REG_DRR1 },
  83         { OMAP1510_MCBSP2_BASE + OMAP_MCBSP_REG_DXR1,
  84           OMAP1510_MCBSP2_BASE + OMAP_MCBSP_REG_DRR1 },
  85         { OMAP1510_MCBSP3_BASE + OMAP_MCBSP_REG_DXR1,
  86           OMAP1510_MCBSP3_BASE + OMAP_MCBSP_REG_DRR1 },
  87 };
  88 #else
  89 static const int omap1_dma_reqs[][2] = {};
  90 static const unsigned long omap1_mcbsp_port[][2] = {};
  91 #endif
  92
  93 #if defined(CONFIG_ARCH_OMAP2) || defined(CONFIG_ARCH_OMAP3)
  94 static const int omap24xx_dma_reqs[][2] = {
  95         { OMAP24XX_DMA_MCBSP1_TX, OMAP24XX_DMA_MCBSP1_RX },
  96         { OMAP24XX_DMA_MCBSP2_TX, OMAP24XX_DMA_MCBSP2_RX },
  97 #if defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP3)
  98         { OMAP24XX_DMA_MCBSP3_TX, OMAP24XX_DMA_MCBSP3_RX },
  99         { OMAP24XX_DMA_MCBSP4_TX, OMAP24XX_DMA_MCBSP4_RX },
 100         { OMAP24XX_DMA_MCBSP5_TX, OMAP24XX_DMA_MCBSP5_RX },
 101 #endif
 102 };
 103 #else
 104 static const int omap24xx_dma_reqs[][2] = {};
 105 #endif
 106
 107 #if defined(CONFIG_ARCH_OMAP2420)
 108 static const unsigned long omap2420_mcbsp_port[][2] = {
 109         { OMAP24XX_MCBSP1_BASE + OMAP_MCBSP_REG_DXR1,
 110           OMAP24XX_MCBSP1_BASE + OMAP_MCBSP_REG_DRR1 },
 111         { OMAP24XX_MCBSP2_BASE + OMAP_MCBSP_REG_DXR1,
 112           OMAP24XX_MCBSP2_BASE + OMAP_MCBSP_REG_DRR1 },
 113 };
 114 #else
 115 static const unsigned long omap2420_mcbsp_port[][2] = {};
 116 #endif
 117
 118 #if defined(CONFIG_ARCH_OMAP2430)
 119 static const unsigned long omap2430_mcbsp_port[][2] = {
 120         { OMAP24XX_MCBSP1_BASE + OMAP_MCBSP_REG_DXR,
 121           OMAP24XX_MCBSP1_BASE + OMAP_MCBSP_REG_DRR },
 122         { OMAP24XX_MCBSP2_BASE + OMAP_MCBSP_REG_DXR,
 123           OMAP24XX_MCBSP2_BASE + OMAP_MCBSP_REG_DRR },
 124         { OMAP2430_MCBSP3_BASE + OMAP_MCBSP_REG_DXR,
 125           OMAP2430_MCBSP3_BASE + OMAP_MCBSP_REG_DRR },
 126         { OMAP2430_MCBSP4_BASE + OMAP_MCBSP_REG_DXR,
 127           OMAP2430_MCBSP4_BASE + OMAP_MCBSP_REG_DRR },
 128         { OMAP2430_MCBSP5_BASE + OMAP_MCBSP_REG_DXR,
 129           OMAP2430_MCBSP5_BASE + OMAP_MCBSP_REG_DRR },
 130 };
 131 #else
 132 static const unsigned long omap2430_mcbsp_port[][2] = {};
 133 #endif
 134
 135 #if defined(CONFIG_ARCH_OMAP3)
 136 static const unsigned long omap34xx_mcbsp_port[][2] = {
 137         { OMAP34XX_MCBSP1_BASE + OMAP_MCBSP_REG_DXR,
 138           OMAP34XX_MCBSP1_BASE + OMAP_MCBSP_REG_DRR },
 139         { OMAP34XX_MCBSP2_BASE + OMAP_MCBSP_REG_DXR,
 140           OMAP34XX_MCBSP2_BASE + OMAP_MCBSP_REG_DRR },
 141         { OMAP34XX_MCBSP3_BASE + OMAP_MCBSP_REG_DXR,
 142           OMAP34XX_MCBSP3_BASE + OMAP_MCBSP_REG_DRR },
 143         { OMAP34XX_MCBSP4_BASE + OMAP_MCBSP_REG_DXR,
 144           OMAP34XX_MCBSP4_BASE + OMAP_MCBSP_REG_DRR },
 145         { OMAP34XX_MCBSP5_BASE + OMAP_MCBSP_REG_DXR,
 146           OMAP34XX_MCBSP5_BASE + OMAP_MCBSP_REG_DRR },
 147 };
 148 #else
 149 static const unsigned long omap34xx_mcbsp_port[][2] = {};
 150 #endif
 151
 152 static void omap_mcbsp_set_threshold(struct snd_pcm_substream *substream)
 153 {
 154         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 155         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
 156         struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
 157         int dma_op_mode = omap_mcbsp_get_dma_op_mode(mcbsp_data->bus_id);
 158         int samples;
 159
 160         /* TODO: Currently, MODE_ELEMENT == MODE_FRAME */
 161         if (dma_op_mode == MCBSP_DMA_MODE_THRESHOLD)
 162                 samples = snd_pcm_lib_period_bytes(substream) >> 1;
 163         else
 164                 samples = 1;
 165
 166         /* Configure McBSP internal buffer usage */
 167         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 168                 omap_mcbsp_set_tx_threshold(mcbsp_data->bus_id, samples - 1);
 169         else
 170                 omap_mcbsp_set_rx_threshold(mcbsp_data->bus_id, samples - 1);
 171 }
 172
 173 static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream,
 174                                   struct snd_soc_dai *dai)
 175 {
 176         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 177         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
 178         struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
 179         int bus_id = mcbsp_data->bus_id;
 180         int err = 0;
 181
 182         if (!cpu_dai->active)
 183                 err = omap_mcbsp_request(bus_id);
 184
 185         if (cpu_is_omap343x()) {
 186                 int dma_op_mode = omap_mcbsp_get_dma_op_mode(bus_id);
 187                 int max_period;
 188
 189                 /*
 190                  * McBSP2 in OMAP3 has 1024 * 32-bit internal audio buffer.
 191                  * Set constraint for minimum buffer size to the same than FIFO
 192                  * size in order to avoid underruns in playback startup because
 193                  * HW is keeping the DMA request active until FIFO is filled.
 194                  */
 195                 if (bus_id == 1)
 196                         snd_pcm_hw_constraint_minmax(substream->runtime,
 197                                         SNDRV_PCM_HW_PARAM_BUFFER_BYTES,
 198                                         4096, UINT_MAX);
 199
 200                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 201                         max_period = omap_mcbsp_get_max_tx_threshold(bus_id);
 202                 else
 203                         max_period = omap_mcbsp_get_max_rx_threshold(bus_id);
 204
 205                 max_period++;
 206                 max_period <<= 1;
 207
 208                 if (dma_op_mode == MCBSP_DMA_MODE_THRESHOLD)
 209                         snd_pcm_hw_constraint_minmax(substream->runtime,
 210                                                 SNDRV_PCM_HW_PARAM_PERIOD_BYTES,
 211                                                 32, max_period);
 212         }
 213
 214         return err;
 215 }
 216
 217 static void omap_mcbsp_dai_shutdown(struct snd_pcm_substream *substream,
 218                                     struct snd_soc_dai *dai)
 219 {
 220         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 221         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
 222         struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
 223
 224         if (!cpu_dai->active) {
 225                 omap_mcbsp_free(mcbsp_data->bus_id);
 226                 mcbsp_data->configured = 0;
 227         }
 228 }
 229
 230 static int omap_mcbsp_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 231                                   struct snd_soc_dai *dai)
 232 {
 233         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 234         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
 235         struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
 236         int err = 0, play = (substream->stream == SNDRV_PCM_STREAM_PLAYBACK);
 237
 238         switch (cmd) {
 239         case SNDRV_PCM_TRIGGER_START:
 240         case SNDRV_PCM_TRIGGER_RESUME:
 241         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 242                 mcbsp_data->active++;
 243                 omap_mcbsp_start(mcbsp_data->bus_id, play, !play);
 244                 break;
 245
 246         case SNDRV_PCM_TRIGGER_STOP:
 247         case SNDRV_PCM_TRIGGER_SUSPEND:
 248         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 249                 omap_mcbsp_stop(mcbsp_data->bus_id, play, !play);
 250                 mcbsp_data->active--;
 251                 break;
 252         default:
 253                 err = -EINVAL;
 254         }
 255
 256         return err;
 257 }
 258
 259 static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream,
 260                                     struct snd_pcm_hw_params *params,
 261                                     struct snd_soc_dai *dai)
 262 {
 263         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 264         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
 265         struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
 266         struct omap_mcbsp_reg_cfg *regs = &mcbsp_data->regs;
 267         int dma, bus_id = mcbsp_data->bus_id, id = cpu_dai->id;
 268         int wlen, channels, wpf, sync_mode = OMAP_DMA_SYNC_ELEMENT;
 269         unsigned long port;
 270         unsigned int format, div, framesize, master;
 271
 272         if (cpu_class_is_omap1()) {
 273                 dma = omap1_dma_reqs[bus_id][substream->stream];
 274                 port = omap1_mcbsp_port[bus_id][substream->stream];
 275         } else if (cpu_is_omap2420()) {
 276                 dma = omap24xx_dma_reqs[bus_id][substream->stream];
 277                 port = omap2420_mcbsp_port[bus_id][substream->stream];
 278         } else if (cpu_is_omap2430()) {
 279                 dma = omap24xx_dma_reqs[bus_id][substream->stream];
 280                 port = omap2430_mcbsp_port[bus_id][substream->stream];
 281         } else if (cpu_is_omap343x()) {
 282                 dma = omap24xx_dma_reqs[bus_id][substream->stream];
 283                 port = omap34xx_mcbsp_port[bus_id][substream->stream];
 284                 omap_mcbsp_dai_dma_params[id][substream->stream].set_threshold =
 285                                                 omap_mcbsp_set_threshold;
 286                 /* TODO: Currently, MODE_ELEMENT == MODE_FRAME */
 287                 if (omap_mcbsp_get_dma_op_mode(bus_id) ==
 288                                                 MCBSP_DMA_MODE_THRESHOLD)
 289                         sync_mode = OMAP_DMA_SYNC_FRAME;
 290         } else {
 291                 return -ENODEV;
 292         }
 293         omap_mcbsp_dai_dma_params[id][substream->stream].name =
 294                 substream->stream ? "Audio Capture" : "Audio Playback";
 295         omap_mcbsp_dai_dma_params[id][substream->stream].dma_req = dma;
 296         omap_mcbsp_dai_dma_params[id][substream->stream].port_addr = port;
 297         omap_mcbsp_dai_dma_params[id][substream->stream].sync_mode = sync_mode;
 298         omap_mcbsp_dai_dma_params[id][substream->stream].data_type =
 299                                                         OMAP_DMA_DATA_TYPE_S16;
 300         cpu_dai->dma_data = &omap_mcbsp_dai_dma_params[id][substream->stream];
 301
 302         if (mcbsp_data->configured) {
 303                 /* McBSP already configured by another stream */
 304                 return 0;
 305         }
 306
 307         format = mcbsp_data->fmt & SND_SOC_DAIFMT_FORMAT_MASK;
 308         wpf = channels = params_channels(params);
 309         if (channels == 2 && format == SND_SOC_DAIFMT_I2S) {
 310                 /* Use dual-phase frames */
 311                 regs->rcr2      |= RPHASE;
 312                 regs->xcr2      |= XPHASE;
 313                 /* Set 1 word per (McBSP) frame for phase1 and phase2 */
 314                 wpf--;
 315                 regs->rcr2      |= RFRLEN2(wpf - 1);
 316                 regs->xcr2      |= XFRLEN2(wpf - 1);
 317         }
 318
 319         regs->rcr1      |= RFRLEN1(wpf - 1);
 320         regs->xcr1      |= XFRLEN1(wpf - 1);
 321
 322         switch (params_format(params)) {
 323         case SNDRV_PCM_FORMAT_S16_LE:
 324                 /* Set word lengths */
 325                 wlen = 16;
 326                 regs->rcr2      |= RWDLEN2(OMAP_MCBSP_WORD_16);
 327                 regs->rcr1      |= RWDLEN1(OMAP_MCBSP_WORD_16);
 328                 regs->xcr2      |= XWDLEN2(OMAP_MCBSP_WORD_16);
 329                 regs->xcr1      |= XWDLEN1(OMAP_MCBSP_WORD_16);
 330                 break;
 331         default:
 332                 /* Unsupported PCM format */
 333                 return -EINVAL;
 334         }
 335
 336         /* In McBSP master modes, FRAME (i.e. sample rate) is generated
 337          * by _counting_ BCLKs. Calculate frame size in BCLKs */
 338         master = mcbsp_data->fmt & SND_SOC_DAIFMT_MASTER_MASK;
 339         if (master ==   SND_SOC_DAIFMT_CBS_CFS) {
 340                 div = mcbsp_data->clk_div ? mcbsp_data->clk_div : 1;
 341                 framesize = (mcbsp_data->in_freq / div) / params_rate(params);
 342
 343                 if (framesize < wlen * channels) {
 344                         printk(KERN_ERR "%s: not enough bandwidth for desired rate and "
 345                                         "channels\n", __func__);
 346                         return -EINVAL;
 347                 }
 348         } else
 349                 framesize = wlen * channels;
 350
 351         /* Set FS period and length in terms of bit clock periods */
 352         switch (format) {
 353         case SND_SOC_DAIFMT_I2S:
 354                 regs->srgr2     |= FPER(framesize - 1);
 355                 regs->srgr1     |= FWID((framesize >> 1) - 1);
 356                 break;
 357         case SND_SOC_DAIFMT_DSP_A:
 358         case SND_SOC_DAIFMT_DSP_B:
 359                 regs->srgr2     |= FPER(framesize - 1);
 360                 regs->srgr1     |= FWID(0);
 361                 break;
 362         }
 363
 364         omap_mcbsp_config(bus_id, &mcbsp_data->regs);
 365         mcbsp_data->configured = 1;
 366
 367         return 0;
 368 }
 369
 370 /*
 371  * This must be called before _set_clkdiv and _set_sysclk since McBSP register
 372  * cache is initialized here
 373  */
 374 static int omap_mcbsp_dai_set_dai_fmt(struct snd_soc_dai *cpu_dai,
 375                                       unsigned int fmt)
 376 {
 377         struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
 378         struct omap_mcbsp_reg_cfg *regs = &mcbsp_data->regs;
 379         unsigned int temp_fmt = fmt;
 380
 381         if (mcbsp_data->configured)
 382                 return 0;
 383
 384         mcbsp_data->fmt = fmt;
 385         memset(regs, 0, sizeof(*regs));
 386         /* Generic McBSP register settings */
 387         regs->spcr2     |= XINTM(3) | FREE;
 388         regs->spcr1     |= RINTM(3);
 389         /* RFIG and XFIG are not defined in 34xx */
 390         if (!cpu_is_omap34xx()) {
 391                 regs->rcr2      |= RFIG;
 392                 regs->xcr2      |= XFIG;
 393         }
 394         if (cpu_is_omap2430() || cpu_is_omap34xx()) {
 395                 regs->xccr = DXENDLY(1) | XDMAEN | XDISABLE;
 396                 regs->rccr = RFULL_CYCLE | RDMAEN | RDISABLE;
 397         }
 398
 399         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 400         case SND_SOC_DAIFMT_I2S:
 401                 /* 1-bit data delay */
 402                 regs->rcr2      |= RDATDLY(1);
 403                 regs->xcr2      |= XDATDLY(1);
 404                 break;
 405         case SND_SOC_DAIFMT_DSP_A:
 406                 /* 1-bit data delay */
 407                 regs->rcr2      |= RDATDLY(1);
 408                 regs->xcr2      |= XDATDLY(1);
 409                 /* Invert FS polarity configuration */
 410                 temp_fmt ^= SND_SOC_DAIFMT_NB_IF;
 411                 break;
 412         case SND_SOC_DAIFMT_DSP_B:
 413                 /* 0-bit data delay */
 414                 regs->rcr2      |= RDATDLY(0);
 415                 regs->xcr2      |= XDATDLY(0);
 416                 /* Invert FS polarity configuration */
 417                 temp_fmt ^= SND_SOC_DAIFMT_NB_IF;
 418                 break;
 419         default:
 420                 /* Unsupported data format */
 421                 return -EINVAL;
 422         }
 423
 424         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 425         case SND_SOC_DAIFMT_CBS_CFS:
 426                 /* McBSP master. Set FS and bit clocks as outputs */
 427                 regs->pcr0      |= FSXM | FSRM |
 428                                    CLKXM | CLKRM;
 429                 /* Sample rate generator drives the FS */
 430                 regs->srgr2     |= FSGM;
 431                 break;
 432         case SND_SOC_DAIFMT_CBM_CFM:
 433                 /* McBSP slave */
 434                 break;
 435         default:
 436                 /* Unsupported master/slave configuration */
 437                 return -EINVAL;
 438         }
 439
 440         /* Set bit clock (CLKX/CLKR) and FS polarities */
 441         switch (temp_fmt & SND_SOC_DAIFMT_INV_MASK) {
 442         case SND_SOC_DAIFMT_NB_NF:
 443                 /*
 444                  * Normal BCLK + FS.
 445                  * FS active low. TX data driven on falling edge of bit clock
 446                  * and RX data sampled on rising edge of bit clock.
 447                  */
 448                 regs->pcr0      |= FSXP | FSRP |
 449                                    CLKXP | CLKRP;
 450                 break;
 451         case SND_SOC_DAIFMT_NB_IF:
 452                 regs->pcr0      |= CLKXP | CLKRP;
 453                 break;
 454         case SND_SOC_DAIFMT_IB_NF:
 455                 regs->pcr0      |= FSXP | FSRP;
 456                 break;
 457         case SND_SOC_DAIFMT_IB_IF:
 458                 break;
 459         default:
 460                 return -EINVAL;
 461         }
 462
 463         return 0;
 464 }
 465
 466 static int omap_mcbsp_dai_set_clkdiv(struct snd_soc_dai *cpu_dai,
 467                                      int div_id, int div)
 468 {
 469         struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
 470         struct omap_mcbsp_reg_cfg *regs = &mcbsp_data->regs;
 471
 472         if (div_id != OMAP_MCBSP_CLKGDV)
 473                 return -ENODEV;
 474
 475         mcbsp_data->clk_div = div;
 476         regs->srgr1     |= CLKGDV(div - 1);
 477
 478         return 0;
 479 }
 480
 481 static int omap_mcbsp_dai_set_clks_src(struct omap_mcbsp_data *mcbsp_data,
 482                                        int clk_id)
 483 {
 484         int sel_bit;
 485         u16 reg, reg_devconf1 = OMAP243X_CONTROL_DEVCONF1;
 486
 487         if (cpu_class_is_omap1()) {
 488                 /* OMAP1's can use only external source clock */
 489                 if (unlikely(clk_id == OMAP_MCBSP_SYSCLK_CLKS_FCLK))
 490                         return -EINVAL;
 491                 else
 492                         return 0;
 493         }
 494
 495         if (cpu_is_omap2420() && mcbsp_data->bus_id > 1)
 496                 return -EINVAL;
 497
 498         if (cpu_is_omap343x())
 499                 reg_devconf1 = OMAP343X_CONTROL_DEVCONF1;
 500
 501         switch (mcbsp_data->bus_id) {
 502         case 0:
 503                 reg = OMAP2_CONTROL_DEVCONF0;
 504                 sel_bit = 2;
 505                 break;
 506         case 1:
 507                 reg = OMAP2_CONTROL_DEVCONF0;
 508                 sel_bit = 6;
 509                 break;
 510         case 2:
 511                 reg = reg_devconf1;
 512                 sel_bit = 0;
 513                 break;
 514         case 3:
 515                 reg = reg_devconf1;
 516                 sel_bit = 2;
 517                 break;
 518         case 4:
 519                 reg = reg_devconf1;
 520                 sel_bit = 4;
 521                 break;
 522         default:
 523                 return -EINVAL;
 524         }
 525
 526         if (clk_id == OMAP_MCBSP_SYSCLK_CLKS_FCLK)
 527                 omap_ctrl_writel(omap_ctrl_readl(reg) & ~(1 << sel_bit), reg);
 528         else
 529                 omap_ctrl_writel(omap_ctrl_readl(reg) | (1 << sel_bit), reg);
 530
 531         return 0;
 532 }
 533
 534 static int omap_mcbsp_dai_set_rcvr_src(struct omap_mcbsp_data *mcbsp_data,
 535                                        int clk_id)
 536 {
 537         int sel_bit, set = 0;
 538         u16 reg = OMAP2_CONTROL_DEVCONF0;
 539
 540         if (cpu_class_is_omap1())
 541                 return -EINVAL; /* TODO: Can this be implemented for OMAP1? */
 542         if (mcbsp_data->bus_id != 0)
 543                 return -EINVAL;
 544
 545         switch (clk_id) {
 546         case OMAP_MCBSP_CLKR_SRC_CLKX:
 547                 set = 1;
 548         case OMAP_MCBSP_CLKR_SRC_CLKR:
 549                 sel_bit = 3;
 550                 break;
 551         case OMAP_MCBSP_FSR_SRC_FSX:
 552                 set = 1;
 553         case OMAP_MCBSP_FSR_SRC_FSR:
 554                 sel_bit = 4;
 555                 break;
 556         default:
 557                 return -EINVAL;
 558         }
 559
 560         if (set)
 561                 omap_ctrl_writel(omap_ctrl_readl(reg) | (1 << sel_bit), reg);
 562         else
 563                 omap_ctrl_writel(omap_ctrl_readl(reg) & ~(1 << sel_bit), reg);
 564
 565         return 0;
 566 }
 567
 568 static int omap_mcbsp_dai_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
 569                                          int clk_id, unsigned int freq,
 570                                          int dir)
 571 {
 572         struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
 573         struct omap_mcbsp_reg_cfg *regs = &mcbsp_data->regs;
 574         int err = 0;
 575
 576         mcbsp_data->in_freq = freq;
 577
 578         switch (clk_id) {
 579         case OMAP_MCBSP_SYSCLK_CLK:
 580                 regs->srgr2     |= CLKSM;
 581                 break;
 582         case OMAP_MCBSP_SYSCLK_CLKS_FCLK:
 583         case OMAP_MCBSP_SYSCLK_CLKS_EXT:
 584                 err = omap_mcbsp_dai_set_clks_src(mcbsp_data, clk_id);
 585                 break;
 586
 587         case OMAP_MCBSP_SYSCLK_CLKX_EXT:
 588                 regs->srgr2     |= CLKSM;
 589         case OMAP_MCBSP_SYSCLK_CLKR_EXT:
 590                 regs->pcr0      |= SCLKME;
 591                 break;
 592
 593         case OMAP_MCBSP_CLKR_SRC_CLKR:
 594         case OMAP_MCBSP_CLKR_SRC_CLKX:
 595         case OMAP_MCBSP_FSR_SRC_FSR:
 596         case OMAP_MCBSP_FSR_SRC_FSX:
 597                 err = omap_mcbsp_dai_set_rcvr_src(mcbsp_data, clk_id);
 598                 break;
 599         default:
 600                 err = -ENODEV;
 601         }
 602
 603         return err;
 604 }
 605
 606 static struct snd_soc_dai_ops omap_mcbsp_dai_ops = {
 607         .startup        = omap_mcbsp_dai_startup,
 608         .shutdown       = omap_mcbsp_dai_shutdown,
 609         .trigger        = omap_mcbsp_dai_trigger,
 610         .hw_params      = omap_mcbsp_dai_hw_params,
 611         .set_fmt        = omap_mcbsp_dai_set_dai_fmt,
 612         .set_clkdiv     = omap_mcbsp_dai_set_clkdiv,
 613         .set_sysclk     = omap_mcbsp_dai_set_dai_sysclk,
 614 };
 615
 616 #define OMAP_MCBSP_DAI_BUILDER(link_id)                         \
 617 {                                                               \
 618         .name = "omap-mcbsp-dai-"#link_id,                      \
 619         .id = (link_id),                                        \
 620         .playback = {                                           \
 621                 .channels_min = 1,                              \
 622                 .channels_max = 16,                             \
 623                 .rates = OMAP_MCBSP_RATES,                      \
 624                 .formats = SNDRV_PCM_FMTBIT_S16_LE,             \
 625         },                                                      \
 626         .capture = {                                            \
 627                 .channels_min = 1,                              \
 628                 .channels_max = 16,                             \
 629                 .rates = OMAP_MCBSP_RATES,                      \
 630                 .formats = SNDRV_PCM_FMTBIT_S16_LE,             \
 631         },                                                      \
 632         .ops = &omap_mcbsp_dai_ops,                             \
 633         .private_data = &mcbsp_data[(link_id)].bus_id,          \
 634 }
 635
 636 struct snd_soc_dai omap_mcbsp_dai[] = {
 637         OMAP_MCBSP_DAI_BUILDER(0),
 638         OMAP_MCBSP_DAI_BUILDER(1),
 639 #if NUM_LINKS >= 3
 640         OMAP_MCBSP_DAI_BUILDER(2),
 641 #endif
 642 #if NUM_LINKS == 5
 643         OMAP_MCBSP_DAI_BUILDER(3),
 644         OMAP_MCBSP_DAI_BUILDER(4),
 645 #endif
 646 };
 647
 648 EXPORT_SYMBOL_GPL(omap_mcbsp_dai);
 649
 650 int omap_mcbsp_st_info_volsw(struct snd_kcontrol *kcontrol,
 651                         struct snd_ctl_elem_info *uinfo)
 652 {
 653         struct soc_mixer_control *mc =
 654                 (struct soc_mixer_control *)kcontrol->private_value;
 655         int max = mc->max;
 656         int min = mc->min;
 657
 658         uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
 659         uinfo->count = 1;
 660         uinfo->value.integer.min = min;
 661         uinfo->value.integer.max = max;
 662         return 0;
 663 }
 664
 665 #define OMAP_MCBSP_ST_SET_CHANNEL_VOLUME(id, channel)                   \
 666 static int                                                              \
 667 omap_mcbsp##id##_set_st_ch##channel##_volume(struct snd_kcontrol *kc,   \
 668                                         struct snd_ctl_elem_value *uc)  \
 669 {                                                                       \
 670         struct soc_mixer_control *mc =                                  \
 671                 (struct soc_mixer_control *)kc->private_value;          \
 672         int max = mc->max;                                              \
 673         int min = mc->min;                                              \
 674         int val = uc->value.integer.value[0];                           \
 675                                                                         \
 676         if (val < min || val > max)                                     \
 677                 return -EINVAL;                                         \
 678                                                                         \
 679         /* OMAP McBSP implementation uses index values 0..4 */          \
 680         return omap_st_set_chgain((id)-1, channel, val);                \
 681 }
 682
 683 #define OMAP_MCBSP_ST_GET_CHANNEL_VOLUME(id, channel)                   \
 684 static int                                                              \
 685 omap_mcbsp##id##_get_st_ch##channel##_volume(struct snd_kcontrol *kc,   \
 686                                         struct snd_ctl_elem_value *uc)  \
 687 {                                                                       \
 688         s16 chgain;                                                     \
 689                                                                         \
 690         if (omap_st_get_chgain((id)-1, channel, &chgain))               \
 691                 return -EAGAIN;                                         \
 692                                                                         \
 693         uc->value.integer.value[0] = chgain;                            \
 694         return 0;                                                       \
 695 }
 696
 697 OMAP_MCBSP_ST_SET_CHANNEL_VOLUME(2, 0)
 698 OMAP_MCBSP_ST_SET_CHANNEL_VOLUME(2, 1)
 699 OMAP_MCBSP_ST_SET_CHANNEL_VOLUME(3, 0)
 700 OMAP_MCBSP_ST_SET_CHANNEL_VOLUME(3, 1)
 701 OMAP_MCBSP_ST_GET_CHANNEL_VOLUME(2, 0)
 702 OMAP_MCBSP_ST_GET_CHANNEL_VOLUME(2, 1)
 703 OMAP_MCBSP_ST_GET_CHANNEL_VOLUME(3, 0)
 704 OMAP_MCBSP_ST_GET_CHANNEL_VOLUME(3, 1)
 705
 706 static int omap_mcbsp_st_put_mode(struct snd_kcontrol *kcontrol,
 707                                 struct snd_ctl_elem_value *ucontrol)
 708 {
 709         struct soc_mixer_control *mc =
 710                 (struct soc_mixer_control *)kcontrol->private_value;
 711         u8 value = ucontrol->value.integer.value[0];
 712
 713         if (value == omap_st_is_enabled(mc->reg))
 714                 return 0;
 715
 716         if (value)
 717                 omap_st_enable(mc->reg);
 718         else
 719                 omap_st_disable(mc->reg);
 720
 721         return 1;
 722 }
 723
 724 static int omap_mcbsp_st_get_mode(struct snd_kcontrol *kcontrol,
 725                                 struct snd_ctl_elem_value *ucontrol)
 726 {
 727         struct soc_mixer_control *mc =
 728                 (struct soc_mixer_control *)kcontrol->private_value;
 729
 730         ucontrol->value.integer.value[0] = omap_st_is_enabled(mc->reg);
 731         return 0;
 732 }
 733
 734 static const struct snd_kcontrol_new omap_mcbsp2_st_controls[] = {
 735         SOC_SINGLE_EXT("McBSP2 Sidetone Switch", 1, 0, 1, 0,
 736                         omap_mcbsp_st_get_mode, omap_mcbsp_st_put_mode),
 737         OMAP_MCBSP_SOC_SINGLE_S16_EXT("McBSP2 Sidetone Channel 0 Volume",
 738                                       -32768, 32767,
 739                                       omap_mcbsp2_get_st_ch0_volume,
 740                                       omap_mcbsp2_set_st_ch0_volume),
 741         OMAP_MCBSP_SOC_SINGLE_S16_EXT("McBSP2 Sidetone Channel 1 Volume",
 742                                       -32768, 32767,
 743                                       omap_mcbsp2_get_st_ch1_volume,
 744                                       omap_mcbsp2_set_st_ch1_volume),
 745 };
 746
 747 static const struct snd_kcontrol_new omap_mcbsp3_st_controls[] = {
 748         SOC_SINGLE_EXT("McBSP3 Sidetone Switch", 2, 0, 1, 0,
 749                         omap_mcbsp_st_get_mode, omap_mcbsp_st_put_mode),
 750         OMAP_MCBSP_SOC_SINGLE_S16_EXT("McBSP3 Sidetone Channel 0 Volume",
 751                                       -32768, 32767,
 752                                       omap_mcbsp3_get_st_ch0_volume,
 753                                       omap_mcbsp3_set_st_ch0_volume),
 754         OMAP_MCBSP_SOC_SINGLE_S16_EXT("McBSP3 Sidetone Channel 1 Volume",
 755                                       -32768, 32767,
 756                                       omap_mcbsp3_get_st_ch1_volume,
 757                                       omap_mcbsp3_set_st_ch1_volume),
 758 };
 759
 760 int omap_mcbsp_st_add_controls(struct snd_soc_codec *codec, int mcbsp_id)
 761 {
 762         if (!cpu_is_omap34xx())
 763                 return -ENODEV;
 764
 765         switch (mcbsp_id) {
 766         case 1: /* McBSP 2 */
 767                 return snd_soc_add_controls(codec, omap_mcbsp2_st_controls,
 768                                         ARRAY_SIZE(omap_mcbsp2_st_controls));
 769         case 2: /* McBSP 3 */
 770                 return snd_soc_add_controls(codec, omap_mcbsp3_st_controls,
 771                                         ARRAY_SIZE(omap_mcbsp3_st_controls));
 772         default:
 773                 break;
 774         }
 775
 776         return -EINVAL;
 777 }
 778 EXPORT_SYMBOL_GPL(omap_mcbsp_st_add_controls);
 779
 780 static int __init snd_omap_mcbsp_init(void)
 781 {
 782         return snd_soc_register_dais(omap_mcbsp_dai,
 783                                      ARRAY_SIZE(omap_mcbsp_dai));
 784 }
 785 module_init(snd_omap_mcbsp_init);
 786
 787 static void __exit snd_omap_mcbsp_exit(void)
 788 {
 789         snd_soc_unregister_dais(omap_mcbsp_dai, ARRAY_SIZE(omap_mcbsp_dai));
 790 }
 791 module_exit(snd_omap_mcbsp_exit);
 792
 793 MODULE_AUTHOR("Jarkko Nikula <jhnikula@gmail.com>");
 794 MODULE_DESCRIPTION("OMAP I2S SoC Interface");
 795 MODULE_LICENSE("GPL");