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@nokia.com>
   7  *
   8  * This program is free software; you can redistribute it and/or
   9  * modify it under the terms of the GNU General Public License
  10  * version 2 as published by the Free Software Foundation.
  11  *
  12  * This program is distributed in the hope that it will be useful, but
  13  * WITHOUT ANY WARRANTY; without even the implied warranty of
  14  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  15  * General Public License for more details.
  16  *
  17  * You should have received a copy of the GNU General Public License
  18  * along with this program; if not, write to the Free Software
  19  * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
  20  * 02110-1301 USA
  21  *
  22  */
  23
  24 #include <linux/init.h>
  25 #include <linux/module.h>
  26 #include <linux/device.h>
  27 #include <sound/core.h>
  28 #include <sound/pcm.h>
  29 #include <sound/pcm_params.h>
  30 #include <sound/initval.h>
  31 #include <sound/soc.h>
  32
  33 #include <mach/control.h>
  34 #include <mach/dma.h>
  35 #include <mach/mcbsp.h>
  36 #include "omap-mcbsp.h"
  37 #include "omap-pcm.h"
  38
  39 #define OMAP_MCBSP_RATES        (SNDRV_PCM_RATE_8000_96000)
  40
  41 struct omap_mcbsp_data {
  42         unsigned int                    bus_id;
  43         struct omap_mcbsp_reg_cfg       regs;
  44         unsigned int                    fmt;
  45         /*
  46          * Flags indicating is the bus already activated and configured by
  47          * another substream
  48          */
  49         int                             active;
  50         int                             configured;
  51 };
  52
  53 #define to_mcbsp(priv)  container_of((priv), struct omap_mcbsp_data, bus_id)
  54
  55 static struct omap_mcbsp_data mcbsp_data[NUM_LINKS];
  56
  57 /*
  58  * Stream DMA parameters. DMA request line and port address are set runtime
  59  * since they are different between OMAP1 and later OMAPs
  60  */
  61 static struct omap_pcm_dma_data omap_mcbsp_dai_dma_params[NUM_LINKS][2];
  62
  63 #if defined(CONFIG_ARCH_OMAP15XX) || defined(CONFIG_ARCH_OMAP16XX)
  64 static const int omap1_dma_reqs[][2] = {
  65         { OMAP_DMA_MCBSP1_TX, OMAP_DMA_MCBSP1_RX },
  66         { OMAP_DMA_MCBSP2_TX, OMAP_DMA_MCBSP2_RX },
  67         { OMAP_DMA_MCBSP3_TX, OMAP_DMA_MCBSP3_RX },
  68 };
  69 static const unsigned long omap1_mcbsp_port[][2] = {
  70         { OMAP1510_MCBSP1_BASE + OMAP_MCBSP_REG_DXR1,
  71           OMAP1510_MCBSP1_BASE + OMAP_MCBSP_REG_DRR1 },
  72         { OMAP1510_MCBSP2_BASE + OMAP_MCBSP_REG_DXR1,
  73           OMAP1510_MCBSP2_BASE + OMAP_MCBSP_REG_DRR1 },
  74         { OMAP1510_MCBSP3_BASE + OMAP_MCBSP_REG_DXR1,
  75           OMAP1510_MCBSP3_BASE + OMAP_MCBSP_REG_DRR1 },
  76 };
  77 #else
  78 static const int omap1_dma_reqs[][2] = {};
  79 static const unsigned long omap1_mcbsp_port[][2] = {};
  80 #endif
  81
  82 #if defined(CONFIG_ARCH_OMAP24XX) || defined(CONFIG_ARCH_OMAP34XX)
  83 static const int omap24xx_dma_reqs[][2] = {
  84         { OMAP24XX_DMA_MCBSP1_TX, OMAP24XX_DMA_MCBSP1_RX },
  85         { OMAP24XX_DMA_MCBSP2_TX, OMAP24XX_DMA_MCBSP2_RX },
  86 #if defined(CONFIG_ARCH_OMAP2430) || defined(CONFIG_ARCH_OMAP34XX)
  87         { OMAP24XX_DMA_MCBSP3_TX, OMAP24XX_DMA_MCBSP3_RX },
  88         { OMAP24XX_DMA_MCBSP4_TX, OMAP24XX_DMA_MCBSP4_RX },
  89         { OMAP24XX_DMA_MCBSP5_TX, OMAP24XX_DMA_MCBSP5_RX },
  90 #endif
  91 };
  92 #else
  93 static const int omap24xx_dma_reqs[][2] = {};
  94 #endif
  95
  96 #if defined(CONFIG_ARCH_OMAP2420)
  97 static const unsigned long omap2420_mcbsp_port[][2] = {
  98         { OMAP24XX_MCBSP1_BASE + OMAP_MCBSP_REG_DXR1,
  99           OMAP24XX_MCBSP1_BASE + OMAP_MCBSP_REG_DRR1 },
 100         { OMAP24XX_MCBSP2_BASE + OMAP_MCBSP_REG_DXR1,
 101           OMAP24XX_MCBSP2_BASE + OMAP_MCBSP_REG_DRR1 },
 102 };
 103 #else
 104 static const unsigned long omap2420_mcbsp_port[][2] = {};
 105 #endif
 106
 107 #if defined(CONFIG_ARCH_OMAP2430)
 108 static const unsigned long omap2430_mcbsp_port[][2] = {
 109         { OMAP24XX_MCBSP1_BASE + OMAP_MCBSP_REG_DXR,
 110           OMAP24XX_MCBSP1_BASE + OMAP_MCBSP_REG_DRR },
 111         { OMAP24XX_MCBSP2_BASE + OMAP_MCBSP_REG_DXR,
 112           OMAP24XX_MCBSP2_BASE + OMAP_MCBSP_REG_DRR },
 113         { OMAP2430_MCBSP3_BASE + OMAP_MCBSP_REG_DXR,
 114           OMAP2430_MCBSP3_BASE + OMAP_MCBSP_REG_DRR },
 115         { OMAP2430_MCBSP4_BASE + OMAP_MCBSP_REG_DXR,
 116           OMAP2430_MCBSP4_BASE + OMAP_MCBSP_REG_DRR },
 117         { OMAP2430_MCBSP5_BASE + OMAP_MCBSP_REG_DXR,
 118           OMAP2430_MCBSP5_BASE + OMAP_MCBSP_REG_DRR },
 119 };
 120 #else
 121 static const unsigned long omap2430_mcbsp_port[][2] = {};
 122 #endif
 123
 124 #if defined(CONFIG_ARCH_OMAP34XX)
 125 static const unsigned long omap34xx_mcbsp_port[][2] = {
 126         { OMAP34XX_MCBSP1_BASE + OMAP_MCBSP_REG_DXR,
 127           OMAP34XX_MCBSP1_BASE + OMAP_MCBSP_REG_DRR },
 128         { OMAP34XX_MCBSP2_BASE + OMAP_MCBSP_REG_DXR,
 129           OMAP34XX_MCBSP2_BASE + OMAP_MCBSP_REG_DRR },
 130         { OMAP34XX_MCBSP3_BASE + OMAP_MCBSP_REG_DXR,
 131           OMAP34XX_MCBSP3_BASE + OMAP_MCBSP_REG_DRR },
 132         { OMAP34XX_MCBSP4_BASE + OMAP_MCBSP_REG_DXR,
 133           OMAP34XX_MCBSP4_BASE + OMAP_MCBSP_REG_DRR },
 134         { OMAP34XX_MCBSP5_BASE + OMAP_MCBSP_REG_DXR,
 135           OMAP34XX_MCBSP5_BASE + OMAP_MCBSP_REG_DRR },
 136 };
 137 #else
 138 static const unsigned long omap34xx_mcbsp_port[][2] = {};
 139 #endif
 140
 141 static int omap_mcbsp_dai_startup(struct snd_pcm_substream *substream,
 142                                   struct snd_soc_dai *dai)
 143 {
 144         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 145         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
 146         struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
 147         int err = 0;
 148
 149         if (!cpu_dai->active)
 150                 err = omap_mcbsp_request(mcbsp_data->bus_id);
 151
 152         return err;
 153 }
 154
 155 static void omap_mcbsp_dai_shutdown(struct snd_pcm_substream *substream,
 156                                     struct snd_soc_dai *dai)
 157 {
 158         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 159         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
 160         struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
 161
 162         if (!cpu_dai->active) {
 163                 omap_mcbsp_free(mcbsp_data->bus_id);
 164                 mcbsp_data->configured = 0;
 165         }
 166 }
 167
 168 static int omap_mcbsp_dai_trigger(struct snd_pcm_substream *substream, int cmd,
 169                                   struct snd_soc_dai *dai)
 170 {
 171         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 172         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
 173         struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
 174         int err = 0;
 175
 176         switch (cmd) {
 177         case SNDRV_PCM_TRIGGER_START:
 178         case SNDRV_PCM_TRIGGER_RESUME:
 179         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 180                 if (!mcbsp_data->active++)
 181                         omap_mcbsp_start(mcbsp_data->bus_id);
 182                 break;
 183
 184         case SNDRV_PCM_TRIGGER_STOP:
 185         case SNDRV_PCM_TRIGGER_SUSPEND:
 186         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 187                 if (!--mcbsp_data->active)
 188                         omap_mcbsp_stop(mcbsp_data->bus_id);
 189                 break;
 190         default:
 191                 err = -EINVAL;
 192         }
 193
 194         return err;
 195 }
 196
 197 static int omap_mcbsp_dai_hw_params(struct snd_pcm_substream *substream,
 198                                     struct snd_pcm_hw_params *params,
 199                                     struct snd_soc_dai *dai)
 200 {
 201         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 202         struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
 203         struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
 204         struct omap_mcbsp_reg_cfg *regs = &mcbsp_data->regs;
 205         int dma, bus_id = mcbsp_data->bus_id, id = cpu_dai->id;
 206         int wlen, channels;
 207         unsigned long port;
 208
 209         if (cpu_class_is_omap1()) {
 210                 dma = omap1_dma_reqs[bus_id][substream->stream];
 211                 port = omap1_mcbsp_port[bus_id][substream->stream];
 212         } else if (cpu_is_omap2420()) {
 213                 dma = omap24xx_dma_reqs[bus_id][substream->stream];
 214                 port = omap2420_mcbsp_port[bus_id][substream->stream];
 215         } else if (cpu_is_omap2430()) {
 216                 dma = omap24xx_dma_reqs[bus_id][substream->stream];
 217                 port = omap2430_mcbsp_port[bus_id][substream->stream];
 218         } else if (cpu_is_omap343x()) {
 219                 dma = omap24xx_dma_reqs[bus_id][substream->stream];
 220                 port = omap34xx_mcbsp_port[bus_id][substream->stream];
 221         } else {
 222                 return -ENODEV;
 223         }
 224         omap_mcbsp_dai_dma_params[id][substream->stream].name =
 225                 substream->stream ? "Audio Capture" : "Audio Playback";
 226         omap_mcbsp_dai_dma_params[id][substream->stream].dma_req = dma;
 227         omap_mcbsp_dai_dma_params[id][substream->stream].port_addr = port;
 228         cpu_dai->dma_data = &omap_mcbsp_dai_dma_params[id][substream->stream];
 229
 230         if (mcbsp_data->configured) {
 231                 /* McBSP already configured by another stream */
 232                 return 0;
 233         }
 234
 235         channels = params_channels(params);
 236         switch (channels) {
 237         case 2:
 238                 /* Use dual-phase frames */
 239                 regs->rcr2      |= RPHASE;
 240                 regs->xcr2      |= XPHASE;
 241         case 1:
 242                 /* Set 1 word per (McBSP) frame */
 243                 regs->rcr2      |= RFRLEN2(1 - 1);
 244                 regs->rcr1      |= RFRLEN1(1 - 1);
 245                 regs->xcr2      |= XFRLEN2(1 - 1);
 246                 regs->xcr1      |= XFRLEN1(1 - 1);
 247                 break;
 248         default:
 249                 /* Unsupported number of channels */
 250                 return -EINVAL;
 251         }
 252
 253         switch (params_format(params)) {
 254         case SNDRV_PCM_FORMAT_S16_LE:
 255                 /* Set word lengths */
 256                 wlen = 16;
 257                 regs->rcr2      |= RWDLEN2(OMAP_MCBSP_WORD_16);
 258                 regs->rcr1      |= RWDLEN1(OMAP_MCBSP_WORD_16);
 259                 regs->xcr2      |= XWDLEN2(OMAP_MCBSP_WORD_16);
 260                 regs->xcr1      |= XWDLEN1(OMAP_MCBSP_WORD_16);
 261                 break;
 262         default:
 263                 /* Unsupported PCM format */
 264                 return -EINVAL;
 265         }
 266
 267         /* Set FS period and length in terms of bit clock periods */
 268         switch (mcbsp_data->fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 269         case SND_SOC_DAIFMT_I2S:
 270                 regs->srgr2     |= FPER(wlen * 2 - 1);
 271                 regs->srgr1     |= FWID(wlen - 1);
 272                 break;
 273         case SND_SOC_DAIFMT_DSP_B:
 274                 regs->srgr2     |= FPER(wlen * channels - 1);
 275                 regs->srgr1     |= FWID(wlen * channels - 2);
 276                 break;
 277         }
 278
 279         omap_mcbsp_config(bus_id, &mcbsp_data->regs);
 280         mcbsp_data->configured = 1;
 281
 282         return 0;
 283 }
 284
 285 /*
 286  * This must be called before _set_clkdiv and _set_sysclk since McBSP register
 287  * cache is initialized here
 288  */
 289 static int omap_mcbsp_dai_set_dai_fmt(struct snd_soc_dai *cpu_dai,
 290                                       unsigned int fmt)
 291 {
 292         struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
 293         struct omap_mcbsp_reg_cfg *regs = &mcbsp_data->regs;
 294
 295         if (mcbsp_data->configured)
 296                 return 0;
 297
 298         mcbsp_data->fmt = fmt;
 299         memset(regs, 0, sizeof(*regs));
 300         /* Generic McBSP register settings */
 301         regs->spcr2     |= XINTM(3) | FREE;
 302         regs->spcr1     |= RINTM(3);
 303         regs->rcr2      |= RFIG;
 304         regs->xcr2      |= XFIG;
 305
 306         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 307         case SND_SOC_DAIFMT_I2S:
 308                 /* 1-bit data delay */
 309                 regs->rcr2      |= RDATDLY(1);
 310                 regs->xcr2      |= XDATDLY(1);
 311                 break;
 312         case SND_SOC_DAIFMT_DSP_B:
 313                 /* 0-bit data delay */
 314                 regs->rcr2      |= RDATDLY(0);
 315                 regs->xcr2      |= XDATDLY(0);
 316                 break;
 317         default:
 318                 /* Unsupported data format */
 319                 return -EINVAL;
 320         }
 321
 322         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 323         case SND_SOC_DAIFMT_CBS_CFS:
 324                 /* McBSP master. Set FS and bit clocks as outputs */
 325                 regs->pcr0      |= FSXM | FSRM |
 326                                    CLKXM | CLKRM;
 327                 /* Sample rate generator drives the FS */
 328                 regs->srgr2     |= FSGM;
 329                 break;
 330         case SND_SOC_DAIFMT_CBM_CFM:
 331                 /* McBSP slave */
 332                 break;
 333         default:
 334                 /* Unsupported master/slave configuration */
 335                 return -EINVAL;
 336         }
 337
 338         /* Set bit clock (CLKX/CLKR) and FS polarities */
 339         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 340         case SND_SOC_DAIFMT_NB_NF:
 341                 /*
 342                  * Normal BCLK + FS.
 343                  * FS active low. TX data driven on falling edge of bit clock
 344                  * and RX data sampled on rising edge of bit clock.
 345                  */
 346                 regs->pcr0      |= FSXP | FSRP |
 347                                    CLKXP | CLKRP;
 348                 break;
 349         case SND_SOC_DAIFMT_NB_IF:
 350                 regs->pcr0      |= CLKXP | CLKRP;
 351                 break;
 352         case SND_SOC_DAIFMT_IB_NF:
 353                 regs->pcr0      |= FSXP | FSRP;
 354                 break;
 355         case SND_SOC_DAIFMT_IB_IF:
 356                 break;
 357         default:
 358                 return -EINVAL;
 359         }
 360
 361         return 0;
 362 }
 363
 364 static int omap_mcbsp_dai_set_clkdiv(struct snd_soc_dai *cpu_dai,
 365                                      int div_id, int div)
 366 {
 367         struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
 368         struct omap_mcbsp_reg_cfg *regs = &mcbsp_data->regs;
 369
 370         if (div_id != OMAP_MCBSP_CLKGDV)
 371                 return -ENODEV;
 372
 373         regs->srgr1     |= CLKGDV(div - 1);
 374
 375         return 0;
 376 }
 377
 378 static int omap_mcbsp_dai_set_clks_src(struct omap_mcbsp_data *mcbsp_data,
 379                                        int clk_id)
 380 {
 381         int sel_bit;
 382         u16 reg, reg_devconf1 = OMAP243X_CONTROL_DEVCONF1;
 383
 384         if (cpu_class_is_omap1()) {
 385                 /* OMAP1's can use only external source clock */
 386                 if (unlikely(clk_id == OMAP_MCBSP_SYSCLK_CLKS_FCLK))
 387                         return -EINVAL;
 388                 else
 389                         return 0;
 390         }
 391
 392         if (cpu_is_omap2420() && mcbsp_data->bus_id > 1)
 393                 return -EINVAL;
 394
 395         if (cpu_is_omap343x())
 396                 reg_devconf1 = OMAP343X_CONTROL_DEVCONF1;
 397
 398         switch (mcbsp_data->bus_id) {
 399         case 0:
 400                 reg = OMAP2_CONTROL_DEVCONF0;
 401                 sel_bit = 2;
 402                 break;
 403         case 1:
 404                 reg = OMAP2_CONTROL_DEVCONF0;
 405                 sel_bit = 6;
 406                 break;
 407         case 2:
 408                 reg = reg_devconf1;
 409                 sel_bit = 0;
 410                 break;
 411         case 3:
 412                 reg = reg_devconf1;
 413                 sel_bit = 2;
 414                 break;
 415         case 4:
 416                 reg = reg_devconf1;
 417                 sel_bit = 4;
 418                 break;
 419         default:
 420                 return -EINVAL;
 421         }
 422
 423         if (clk_id == OMAP_MCBSP_SYSCLK_CLKS_FCLK)
 424                 omap_ctrl_writel(omap_ctrl_readl(reg) & ~(1 << sel_bit), reg);
 425         else
 426                 omap_ctrl_writel(omap_ctrl_readl(reg) | (1 << sel_bit), reg);
 427
 428         return 0;
 429 }
 430
 431 static int omap_mcbsp_dai_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
 432                                          int clk_id, unsigned int freq,
 433                                          int dir)
 434 {
 435         struct omap_mcbsp_data *mcbsp_data = to_mcbsp(cpu_dai->private_data);
 436         struct omap_mcbsp_reg_cfg *regs = &mcbsp_data->regs;
 437         int err = 0;
 438
 439         switch (clk_id) {
 440         case OMAP_MCBSP_SYSCLK_CLK:
 441                 regs->srgr2     |= CLKSM;
 442                 break;
 443         case OMAP_MCBSP_SYSCLK_CLKS_FCLK:
 444         case OMAP_MCBSP_SYSCLK_CLKS_EXT:
 445                 err = omap_mcbsp_dai_set_clks_src(mcbsp_data, clk_id);
 446                 break;
 447
 448         case OMAP_MCBSP_SYSCLK_CLKX_EXT:
 449                 regs->srgr2     |= CLKSM;
 450         case OMAP_MCBSP_SYSCLK_CLKR_EXT:
 451                 regs->pcr0      |= SCLKME;
 452                 break;
 453         default:
 454                 err = -ENODEV;
 455         }
 456
 457         return err;
 458 }
 459
 460 #define OMAP_MCBSP_DAI_BUILDER(link_id)                         \
 461 {                                                               \
 462         .name = "omap-mcbsp-dai-"#link_id,                      \
 463         .id = (link_id),                                        \
 464         .playback = {                                           \
 465                 .channels_min = 1,                              \
 466                 .channels_max = 2,                              \
 467                 .rates = OMAP_MCBSP_RATES,                      \
 468                 .formats = SNDRV_PCM_FMTBIT_S16_LE,             \
 469         },                                                      \
 470         .capture = {                                            \
 471                 .channels_min = 1,                              \
 472                 .channels_max = 2,                              \
 473                 .rates = OMAP_MCBSP_RATES,                      \
 474                 .formats = SNDRV_PCM_FMTBIT_S16_LE,             \
 475         },                                                      \
 476         .ops = {                                                \
 477                 .startup = omap_mcbsp_dai_startup,              \
 478                 .shutdown = omap_mcbsp_dai_shutdown,            \
 479                 .trigger = omap_mcbsp_dai_trigger,              \
 480                 .hw_params = omap_mcbsp_dai_hw_params,          \
 481                 .set_fmt = omap_mcbsp_dai_set_dai_fmt,          \
 482                 .set_clkdiv = omap_mcbsp_dai_set_clkdiv,        \
 483                 .set_sysclk = omap_mcbsp_dai_set_dai_sysclk,    \
 484         },                                                      \
 485         .private_data = &mcbsp_data[(link_id)].bus_id,          \
 486 }
 487
 488 struct snd_soc_dai omap_mcbsp_dai[] = {
 489         OMAP_MCBSP_DAI_BUILDER(0),
 490         OMAP_MCBSP_DAI_BUILDER(1),
 491 #if NUM_LINKS >= 3
 492         OMAP_MCBSP_DAI_BUILDER(2),
 493 #endif
 494 #if NUM_LINKS == 5
 495         OMAP_MCBSP_DAI_BUILDER(3),
 496         OMAP_MCBSP_DAI_BUILDER(4),
 497 #endif
 498 };
 499
 500 EXPORT_SYMBOL_GPL(omap_mcbsp_dai);
 501
 502 static int __init snd_omap_mcbsp_init(void)
 503 {
 504         return snd_soc_register_dais(omap_mcbsp_dai,
 505                                      ARRAY_SIZE(omap_mcbsp_dai));
 506 }
 507 module_init(snd_omap_mcbsp_init);
 508
 509 static void __exit snd_omap_mcbsp_exit(void)
 510 {
 511         snd_soc_unregister_dais(omap_mcbsp_dai, ARRAY_SIZE(omap_mcbsp_dai));
 512 }
 513 module_exit(snd_omap_mcbsp_exit);
 514
 515 MODULE_AUTHOR("Jarkko Nikula <jarkko.nikula@nokia.com>");
 516 MODULE_DESCRIPTION("OMAP I2S SoC Interface");
 517 MODULE_LICENSE("GPL");