sound/soc/samsung/i2s.c

   1 /* sound/soc/samsung/i2s.c
   2  *
   3  * ALSA SoC Audio Layer - Samsung I2S Controller driver
   4  *
   5  * Copyright (c) 2010 Samsung Electronics Co. Ltd.
   6  *      Jaswinder Singh <jassisinghbrar@gmail.com>
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License version 2 as
  10  * published by the Free Software Foundation.
  11  */
  12
  13 #include <linux/delay.h>
  14 #include <linux/slab.h>
  15 #include <linux/clk.h>
  16 #include <linux/io.h>
  17 #include <linux/module.h>
  18 #include <linux/of.h>
  19 #include <linux/of_gpio.h>
  20 #include <linux/pm_runtime.h>
  21
  22 #include <sound/soc.h>
  23 #include <sound/pcm_params.h>
  24
  25 #include <mach/dma.h>
  26
  27 #include <linux/platform_data/asoc-s3c.h>
  28
  29 #include "dma.h"
  30 #include "idma.h"
  31 #include "i2s.h"
  32 #include "i2s-regs.h"
  33
  34 #define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
  35
  36 enum samsung_dai_type {
  37         TYPE_PRI,
  38         TYPE_SEC,
  39 };
  40
  41 struct samsung_i2s_dai_data {
  42         int dai_type;
  43 };
  44
  45 struct i2s_dai {
  46         /* Platform device for this DAI */
  47         struct platform_device *pdev;
  48         /* IOREMAP'd SFRs */
  49         void __iomem    *addr;
  50         /* Physical base address of SFRs */
  51         u32     base;
  52         /* Rate of RCLK source clock */
  53         unsigned long rclk_srcrate;
  54         /* Frame Clock */
  55         unsigned frmclk;
  56         /*
  57          * Specifically requested RCLK,BCLK by MACHINE Driver.
  58          * 0 indicates CPU driver is free to choose any value.
  59          */
  60         unsigned rfs, bfs;
  61         /* I2S Controller's core clock */
  62         struct clk *clk;
  63         /* Clock for generating I2S signals */
  64         struct clk *op_clk;
  65         /* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */
  66         struct i2s_dai *pri_dai;
  67         /* Pointer to the Secondary_Fifo if it has one, NULL otherwise */
  68         struct i2s_dai *sec_dai;
  69 #define DAI_OPENED      (1 << 0) /* Dai is opened */
  70 #define DAI_MANAGER     (1 << 1) /* Dai is the manager */
  71         unsigned mode;
  72         /* Driver for this DAI */
  73         struct snd_soc_dai_driver i2s_dai_drv;
  74         /* DMA parameters */
  75         struct s3c_dma_params dma_playback;
  76         struct s3c_dma_params dma_capture;
  77         struct s3c_dma_params idma_playback;
  78         u32     quirks;
  79         u32     suspend_i2smod;
  80         u32     suspend_i2scon;
  81         u32     suspend_i2spsr;
  82         unsigned long gpios[7]; /* i2s gpio line numbers */
  83 };
  84
  85 /* Lock for cross i/f checks */
  86 static DEFINE_SPINLOCK(lock);
  87
  88 /* If this is the 'overlay' stereo DAI */
  89 static inline bool is_secondary(struct i2s_dai *i2s)
  90 {
  91         return i2s->pri_dai ? true : false;
  92 }
  93
  94 /* If operating in SoC-Slave mode */
  95 static inline bool is_slave(struct i2s_dai *i2s)
  96 {
  97         return (readl(i2s->addr + I2SMOD) & MOD_SLAVE) ? true : false;
  98 }
  99
 100 /* If this interface of the controller is transmitting data */
 101 static inline bool tx_active(struct i2s_dai *i2s)
 102 {
 103         u32 active;
 104
 105         if (!i2s)
 106                 return false;
 107
 108         active = readl(i2s->addr + I2SCON);
 109
 110         if (is_secondary(i2s))
 111                 active &= CON_TXSDMA_ACTIVE;
 112         else
 113                 active &= CON_TXDMA_ACTIVE;
 114
 115         return active ? true : false;
 116 }
 117
 118 /* If the other interface of the controller is transmitting data */
 119 static inline bool other_tx_active(struct i2s_dai *i2s)
 120 {
 121         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 122
 123         return tx_active(other);
 124 }
 125
 126 /* If any interface of the controller is transmitting data */
 127 static inline bool any_tx_active(struct i2s_dai *i2s)
 128 {
 129         return tx_active(i2s) || other_tx_active(i2s);
 130 }
 131
 132 /* If this interface of the controller is receiving data */
 133 static inline bool rx_active(struct i2s_dai *i2s)
 134 {
 135         u32 active;
 136
 137         if (!i2s)
 138                 return false;
 139
 140         active = readl(i2s->addr + I2SCON) & CON_RXDMA_ACTIVE;
 141
 142         return active ? true : false;
 143 }
 144
 145 /* If the other interface of the controller is receiving data */
 146 static inline bool other_rx_active(struct i2s_dai *i2s)
 147 {
 148         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 149
 150         return rx_active(other);
 151 }
 152
 153 /* If any interface of the controller is receiving data */
 154 static inline bool any_rx_active(struct i2s_dai *i2s)
 155 {
 156         return rx_active(i2s) || other_rx_active(i2s);
 157 }
 158
 159 /* If the other DAI is transmitting or receiving data */
 160 static inline bool other_active(struct i2s_dai *i2s)
 161 {
 162         return other_rx_active(i2s) || other_tx_active(i2s);
 163 }
 164
 165 /* If this DAI is transmitting or receiving data */
 166 static inline bool this_active(struct i2s_dai *i2s)
 167 {
 168         return tx_active(i2s) || rx_active(i2s);
 169 }
 170
 171 /* If the controller is active anyway */
 172 static inline bool any_active(struct i2s_dai *i2s)
 173 {
 174         return this_active(i2s) || other_active(i2s);
 175 }
 176
 177 static inline struct i2s_dai *to_info(struct snd_soc_dai *dai)
 178 {
 179         return snd_soc_dai_get_drvdata(dai);
 180 }
 181
 182 static inline bool is_opened(struct i2s_dai *i2s)
 183 {
 184         if (i2s && (i2s->mode & DAI_OPENED))
 185                 return true;
 186         else
 187                 return false;
 188 }
 189
 190 static inline bool is_manager(struct i2s_dai *i2s)
 191 {
 192         if (is_opened(i2s) && (i2s->mode & DAI_MANAGER))
 193                 return true;
 194         else
 195                 return false;
 196 }
 197
 198 /* Read RCLK of I2S (in multiples of LRCLK) */
 199 static inline unsigned get_rfs(struct i2s_dai *i2s)
 200 {
 201         u32 rfs = (readl(i2s->addr + I2SMOD) >> 3) & 0x3;
 202
 203         switch (rfs) {
 204         case 3: return 768;
 205         case 2: return 384;
 206         case 1: return 512;
 207         default: return 256;
 208         }
 209 }
 210
 211 /* Write RCLK of I2S (in multiples of LRCLK) */
 212 static inline void set_rfs(struct i2s_dai *i2s, unsigned rfs)
 213 {
 214         u32 mod = readl(i2s->addr + I2SMOD);
 215
 216         mod &= ~MOD_RCLK_MASK;
 217
 218         switch (rfs) {
 219         case 768:
 220                 mod |= MOD_RCLK_768FS;
 221                 break;
 222         case 512:
 223                 mod |= MOD_RCLK_512FS;
 224                 break;
 225         case 384:
 226                 mod |= MOD_RCLK_384FS;
 227                 break;
 228         default:
 229                 mod |= MOD_RCLK_256FS;
 230                 break;
 231         }
 232
 233         writel(mod, i2s->addr + I2SMOD);
 234 }
 235
 236 /* Read Bit-Clock of I2S (in multiples of LRCLK) */
 237 static inline unsigned get_bfs(struct i2s_dai *i2s)
 238 {
 239         u32 bfs = (readl(i2s->addr + I2SMOD) >> 1) & 0x3;
 240
 241         switch (bfs) {
 242         case 3: return 24;
 243         case 2: return 16;
 244         case 1: return 48;
 245         default: return 32;
 246         }
 247 }
 248
 249 /* Write Bit-Clock of I2S (in multiples of LRCLK) */
 250 static inline void set_bfs(struct i2s_dai *i2s, unsigned bfs)
 251 {
 252         u32 mod = readl(i2s->addr + I2SMOD);
 253
 254         mod &= ~MOD_BCLK_MASK;
 255
 256         switch (bfs) {
 257         case 48:
 258                 mod |= MOD_BCLK_48FS;
 259                 break;
 260         case 32:
 261                 mod |= MOD_BCLK_32FS;
 262                 break;
 263         case 24:
 264                 mod |= MOD_BCLK_24FS;
 265                 break;
 266         case 16:
 267                 mod |= MOD_BCLK_16FS;
 268                 break;
 269         default:
 270                 dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n");
 271                 return;
 272         }
 273
 274         writel(mod, i2s->addr + I2SMOD);
 275 }
 276
 277 /* Sample-Size */
 278 static inline int get_blc(struct i2s_dai *i2s)
 279 {
 280         int blc = readl(i2s->addr + I2SMOD);
 281
 282         blc = (blc >> 13) & 0x3;
 283
 284         switch (blc) {
 285         case 2: return 24;
 286         case 1: return 8;
 287         default: return 16;
 288         }
 289 }
 290
 291 /* TX Channel Control */
 292 static void i2s_txctrl(struct i2s_dai *i2s, int on)
 293 {
 294         void __iomem *addr = i2s->addr;
 295         u32 con = readl(addr + I2SCON);
 296         u32 mod = readl(addr + I2SMOD) & ~MOD_MASK;
 297
 298         if (on) {
 299                 con |= CON_ACTIVE;
 300                 con &= ~CON_TXCH_PAUSE;
 301
 302                 if (is_secondary(i2s)) {
 303                         con |= CON_TXSDMA_ACTIVE;
 304                         con &= ~CON_TXSDMA_PAUSE;
 305                 } else {
 306                         con |= CON_TXDMA_ACTIVE;
 307                         con &= ~CON_TXDMA_PAUSE;
 308                 }
 309
 310                 if (any_rx_active(i2s))
 311                         mod |= MOD_TXRX;
 312                 else
 313                         mod |= MOD_TXONLY;
 314         } else {
 315                 if (is_secondary(i2s)) {
 316                         con |=  CON_TXSDMA_PAUSE;
 317                         con &= ~CON_TXSDMA_ACTIVE;
 318                 } else {
 319                         con |=  CON_TXDMA_PAUSE;
 320                         con &= ~CON_TXDMA_ACTIVE;
 321                 }
 322
 323                 if (other_tx_active(i2s)) {
 324                         writel(con, addr + I2SCON);
 325                         return;
 326                 }
 327
 328                 con |=  CON_TXCH_PAUSE;
 329
 330                 if (any_rx_active(i2s))
 331                         mod |= MOD_RXONLY;
 332                 else
 333                         con &= ~CON_ACTIVE;
 334         }
 335
 336         writel(mod, addr + I2SMOD);
 337         writel(con, addr + I2SCON);
 338 }
 339
 340 /* RX Channel Control */
 341 static void i2s_rxctrl(struct i2s_dai *i2s, int on)
 342 {
 343         void __iomem *addr = i2s->addr;
 344         u32 con = readl(addr + I2SCON);
 345         u32 mod = readl(addr + I2SMOD) & ~MOD_MASK;
 346
 347         if (on) {
 348                 con |= CON_RXDMA_ACTIVE | CON_ACTIVE;
 349                 con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE);
 350
 351                 if (any_tx_active(i2s))
 352                         mod |= MOD_TXRX;
 353                 else
 354                         mod |= MOD_RXONLY;
 355         } else {
 356                 con |=  CON_RXDMA_PAUSE | CON_RXCH_PAUSE;
 357                 con &= ~CON_RXDMA_ACTIVE;
 358
 359                 if (any_tx_active(i2s))
 360                         mod |= MOD_TXONLY;
 361                 else
 362                         con &= ~CON_ACTIVE;
 363         }
 364
 365         writel(mod, addr + I2SMOD);
 366         writel(con, addr + I2SCON);
 367 }
 368
 369 /* Flush FIFO of an interface */
 370 static inline void i2s_fifo(struct i2s_dai *i2s, u32 flush)
 371 {
 372         void __iomem *fic;
 373         u32 val;
 374
 375         if (!i2s)
 376                 return;
 377
 378         if (is_secondary(i2s))
 379                 fic = i2s->addr + I2SFICS;
 380         else
 381                 fic = i2s->addr + I2SFIC;
 382
 383         /* Flush the FIFO */
 384         writel(readl(fic) | flush, fic);
 385
 386         /* Be patient */
 387         val = msecs_to_loops(1) / 1000; /* 1 usec */
 388         while (--val)
 389                 cpu_relax();
 390
 391         writel(readl(fic) & ~flush, fic);
 392 }
 393
 394 static int i2s_set_sysclk(struct snd_soc_dai *dai,
 395           int clk_id, unsigned int rfs, int dir)
 396 {
 397         struct i2s_dai *i2s = to_info(dai);
 398         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 399         u32 mod = readl(i2s->addr + I2SMOD);
 400
 401         switch (clk_id) {
 402         case SAMSUNG_I2S_CDCLK:
 403                 /* Shouldn't matter in GATING(CLOCK_IN) mode */
 404                 if (dir == SND_SOC_CLOCK_IN)
 405                         rfs = 0;
 406
 407                 if ((rfs && other->rfs && (other->rfs != rfs)) ||
 408                                 (any_active(i2s) &&
 409                                 (((dir == SND_SOC_CLOCK_IN)
 410                                         && !(mod & MOD_CDCLKCON)) ||
 411                                 ((dir == SND_SOC_CLOCK_OUT)
 412                                         && (mod & MOD_CDCLKCON))))) {
 413                         dev_err(&i2s->pdev->dev,
 414                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 415                         return -EAGAIN;
 416                 }
 417
 418                 if (dir == SND_SOC_CLOCK_IN)
 419                         mod |= MOD_CDCLKCON;
 420                 else
 421                         mod &= ~MOD_CDCLKCON;
 422
 423                 i2s->rfs = rfs;
 424                 break;
 425
 426         case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */
 427         case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */
 428                 if ((i2s->quirks & QUIRK_NO_MUXPSR)
 429                                 || (clk_id == SAMSUNG_I2S_RCLKSRC_0))
 430                         clk_id = 0;
 431                 else
 432                         clk_id = 1;
 433
 434                 if (!any_active(i2s)) {
 435                         if (i2s->op_clk) {
 436                                 if ((clk_id && !(mod & MOD_IMS_SYSMUX)) ||
 437                                         (!clk_id && (mod & MOD_IMS_SYSMUX))) {
 438                                         clk_disable_unprepare(i2s->op_clk);
 439                                         clk_put(i2s->op_clk);
 440                                 } else {
 441                                         i2s->rclk_srcrate =
 442                                                 clk_get_rate(i2s->op_clk);
 443                                         return 0;
 444                                 }
 445                         }
 446
 447                         if (clk_id)
 448                                 i2s->op_clk = clk_get(&i2s->pdev->dev,
 449                                                 "i2s_opclk1");
 450                         else
 451                                 i2s->op_clk = clk_get(&i2s->pdev->dev,
 452                                                 "i2s_opclk0");
 453                         clk_prepare_enable(i2s->op_clk);
 454                         i2s->rclk_srcrate = clk_get_rate(i2s->op_clk);
 455
 456                         /* Over-ride the other's */
 457                         if (other) {
 458                                 other->op_clk = i2s->op_clk;
 459                                 other->rclk_srcrate = i2s->rclk_srcrate;
 460                         }
 461                 } else if ((!clk_id && (mod & MOD_IMS_SYSMUX))
 462                                 || (clk_id && !(mod & MOD_IMS_SYSMUX))) {
 463                         dev_err(&i2s->pdev->dev,
 464                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 465                         return -EAGAIN;
 466                 } else {
 467                         /* Call can't be on the active DAI */
 468                         i2s->op_clk = other->op_clk;
 469                         i2s->rclk_srcrate = other->rclk_srcrate;
 470                         return 0;
 471                 }
 472
 473                 if (clk_id == 0)
 474                         mod &= ~MOD_IMS_SYSMUX;
 475                 else
 476                         mod |= MOD_IMS_SYSMUX;
 477                 break;
 478
 479         default:
 480                 dev_err(&i2s->pdev->dev, "We don't serve that!\n");
 481                 return -EINVAL;
 482         }
 483
 484         writel(mod, i2s->addr + I2SMOD);
 485
 486         return 0;
 487 }
 488
 489 static int i2s_set_fmt(struct snd_soc_dai *dai,
 490         unsigned int fmt)
 491 {
 492         struct i2s_dai *i2s = to_info(dai);
 493         u32 mod = readl(i2s->addr + I2SMOD);
 494         u32 tmp = 0;
 495
 496         /* Format is priority */
 497         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 498         case SND_SOC_DAIFMT_RIGHT_J:
 499                 tmp |= MOD_LR_RLOW;
 500                 tmp |= MOD_SDF_MSB;
 501                 break;
 502         case SND_SOC_DAIFMT_LEFT_J:
 503                 tmp |= MOD_LR_RLOW;
 504                 tmp |= MOD_SDF_LSB;
 505                 break;
 506         case SND_SOC_DAIFMT_I2S:
 507                 tmp |= MOD_SDF_IIS;
 508                 break;
 509         default:
 510                 dev_err(&i2s->pdev->dev, "Format not supported\n");
 511                 return -EINVAL;
 512         }
 513
 514         /*
 515          * INV flag is relative to the FORMAT flag - if set it simply
 516          * flips the polarity specified by the Standard
 517          */
 518         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 519         case SND_SOC_DAIFMT_NB_NF:
 520                 break;
 521         case SND_SOC_DAIFMT_NB_IF:
 522                 if (tmp & MOD_LR_RLOW)
 523                         tmp &= ~MOD_LR_RLOW;
 524                 else
 525                         tmp |= MOD_LR_RLOW;
 526                 break;
 527         default:
 528                 dev_err(&i2s->pdev->dev, "Polarity not supported\n");
 529                 return -EINVAL;
 530         }
 531
 532         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 533         case SND_SOC_DAIFMT_CBM_CFM:
 534                 tmp |= MOD_SLAVE;
 535                 break;
 536         case SND_SOC_DAIFMT_CBS_CFS:
 537                 /* Set default source clock in Master mode */
 538                 if (i2s->rclk_srcrate == 0)
 539                         i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0,
 540                                                         0, SND_SOC_CLOCK_IN);
 541                 break;
 542         default:
 543                 dev_err(&i2s->pdev->dev, "master/slave format not supported\n");
 544                 return -EINVAL;
 545         }
 546
 547         if (any_active(i2s) &&
 548                         ((mod & (MOD_SDF_MASK | MOD_LR_RLOW
 549                                 | MOD_SLAVE)) != tmp)) {
 550                 dev_err(&i2s->pdev->dev,
 551                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 552                 return -EAGAIN;
 553         }
 554
 555         mod &= ~(MOD_SDF_MASK | MOD_LR_RLOW | MOD_SLAVE);
 556         mod |= tmp;
 557         writel(mod, i2s->addr + I2SMOD);
 558
 559         return 0;
 560 }
 561
 562 static int i2s_hw_params(struct snd_pcm_substream *substream,
 563         struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
 564 {
 565         struct i2s_dai *i2s = to_info(dai);
 566         u32 mod = readl(i2s->addr + I2SMOD);
 567
 568         if (!is_secondary(i2s))
 569                 mod &= ~(MOD_DC2_EN | MOD_DC1_EN);
 570
 571         switch (params_channels(params)) {
 572         case 6:
 573                 mod |= MOD_DC2_EN;
 574         case 4:
 575                 mod |= MOD_DC1_EN;
 576                 break;
 577         case 2:
 578                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 579                         i2s->dma_playback.dma_size = 4;
 580                 else
 581                         i2s->dma_capture.dma_size = 4;
 582                 break;
 583         case 1:
 584                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 585                         i2s->dma_playback.dma_size = 2;
 586                 else
 587                         i2s->dma_capture.dma_size = 2;
 588
 589                 break;
 590         default:
 591                 dev_err(&i2s->pdev->dev, "%d channels not supported\n",
 592                                 params_channels(params));
 593                 return -EINVAL;
 594         }
 595
 596         if (is_secondary(i2s))
 597                 mod &= ~MOD_BLCS_MASK;
 598         else
 599                 mod &= ~MOD_BLCP_MASK;
 600
 601         if (is_manager(i2s))
 602                 mod &= ~MOD_BLC_MASK;
 603
 604         switch (params_format(params)) {
 605         case SNDRV_PCM_FORMAT_S8:
 606                 if (is_secondary(i2s))
 607                         mod |= MOD_BLCS_8BIT;
 608                 else
 609                         mod |= MOD_BLCP_8BIT;
 610                 if (is_manager(i2s))
 611                         mod |= MOD_BLC_8BIT;
 612                 break;
 613         case SNDRV_PCM_FORMAT_S16_LE:
 614                 if (is_secondary(i2s))
 615                         mod |= MOD_BLCS_16BIT;
 616                 else
 617                         mod |= MOD_BLCP_16BIT;
 618                 if (is_manager(i2s))
 619                         mod |= MOD_BLC_16BIT;
 620                 break;
 621         case SNDRV_PCM_FORMAT_S24_LE:
 622                 if (is_secondary(i2s))
 623                         mod |= MOD_BLCS_24BIT;
 624                 else
 625                         mod |= MOD_BLCP_24BIT;
 626                 if (is_manager(i2s))
 627                         mod |= MOD_BLC_24BIT;
 628                 break;
 629         default:
 630                 dev_err(&i2s->pdev->dev, "Format(%d) not supported\n",
 631                                 params_format(params));
 632                 return -EINVAL;
 633         }
 634         writel(mod, i2s->addr + I2SMOD);
 635
 636         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 637                 snd_soc_dai_set_dma_data(dai, substream,
 638                         (void *)&i2s->dma_playback);
 639         else
 640                 snd_soc_dai_set_dma_data(dai, substream,
 641                         (void *)&i2s->dma_capture);
 642
 643         i2s->frmclk = params_rate(params);
 644
 645         return 0;
 646 }
 647
 648 /* We set constraints on the substream acc to the version of I2S */
 649 static int i2s_startup(struct snd_pcm_substream *substream,
 650           struct snd_soc_dai *dai)
 651 {
 652         struct i2s_dai *i2s = to_info(dai);
 653         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 654         unsigned long flags;
 655
 656         spin_lock_irqsave(&lock, flags);
 657
 658         i2s->mode |= DAI_OPENED;
 659
 660         if (is_manager(other))
 661                 i2s->mode &= ~DAI_MANAGER;
 662         else
 663                 i2s->mode |= DAI_MANAGER;
 664
 665         /* Enforce set_sysclk in Master mode */
 666         i2s->rclk_srcrate = 0;
 667
 668         if (!any_active(i2s) && (i2s->quirks & QUIRK_NEED_RSTCLR))
 669                 writel(CON_RSTCLR, i2s->addr + I2SCON);
 670
 671         spin_unlock_irqrestore(&lock, flags);
 672
 673         return 0;
 674 }
 675
 676 static void i2s_shutdown(struct snd_pcm_substream *substream,
 677         struct snd_soc_dai *dai)
 678 {
 679         struct i2s_dai *i2s = to_info(dai);
 680         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 681         unsigned long flags;
 682
 683         spin_lock_irqsave(&lock, flags);
 684
 685         i2s->mode &= ~DAI_OPENED;
 686         i2s->mode &= ~DAI_MANAGER;
 687
 688         if (is_opened(other))
 689                 other->mode |= DAI_MANAGER;
 690
 691         /* Reset any constraint on RFS and BFS */
 692         i2s->rfs = 0;
 693         i2s->bfs = 0;
 694
 695         spin_unlock_irqrestore(&lock, flags);
 696
 697         /* Gate CDCLK by default */
 698         if (!is_opened(other))
 699                 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
 700                                 0, SND_SOC_CLOCK_IN);
 701 }
 702
 703 static int config_setup(struct i2s_dai *i2s)
 704 {
 705         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 706         unsigned rfs, bfs, blc;
 707         u32 psr;
 708
 709         blc = get_blc(i2s);
 710
 711         bfs = i2s->bfs;
 712
 713         if (!bfs && other)
 714                 bfs = other->bfs;
 715
 716         /* Select least possible multiple(2) if no constraint set */
 717         if (!bfs)
 718                 bfs = blc * 2;
 719
 720         rfs = i2s->rfs;
 721
 722         if (!rfs && other)
 723                 rfs = other->rfs;
 724
 725         if ((rfs == 256 || rfs == 512) && (blc == 24)) {
 726                 dev_err(&i2s->pdev->dev,
 727                         "%d-RFS not supported for 24-blc\n", rfs);
 728                 return -EINVAL;
 729         }
 730
 731         if (!rfs) {
 732                 if (bfs == 16 || bfs == 32)
 733                         rfs = 256;
 734                 else
 735                         rfs = 384;
 736         }
 737
 738         /* If already setup and running */
 739         if (any_active(i2s) && (get_rfs(i2s) != rfs || get_bfs(i2s) != bfs)) {
 740                 dev_err(&i2s->pdev->dev,
 741                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 742                 return -EAGAIN;
 743         }
 744
 745         /* Don't bother RFS, BFS & PSR in Slave mode */
 746         if (is_slave(i2s))
 747                 return 0;
 748
 749         set_bfs(i2s, bfs);
 750         set_rfs(i2s, rfs);
 751
 752         if (!(i2s->quirks & QUIRK_NO_MUXPSR)) {
 753                 psr = i2s->rclk_srcrate / i2s->frmclk / rfs;
 754                 writel(((psr - 1) << 8) | PSR_PSREN, i2s->addr + I2SPSR);
 755                 dev_dbg(&i2s->pdev->dev,
 756                         "RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n",
 757                                 i2s->rclk_srcrate, psr, rfs, bfs);
 758         }
 759
 760         return 0;
 761 }
 762
 763 static int i2s_trigger(struct snd_pcm_substream *substream,
 764         int cmd, struct snd_soc_dai *dai)
 765 {
 766         int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
 767         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 768         struct i2s_dai *i2s = to_info(rtd->cpu_dai);
 769         unsigned long flags;
 770
 771         switch (cmd) {
 772         case SNDRV_PCM_TRIGGER_START:
 773         case SNDRV_PCM_TRIGGER_RESUME:
 774         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 775                 local_irq_save(flags);
 776
 777                 if (config_setup(i2s)) {
 778                         local_irq_restore(flags);
 779                         return -EINVAL;
 780                 }
 781
 782                 if (capture)
 783                         i2s_rxctrl(i2s, 1);
 784                 else
 785                         i2s_txctrl(i2s, 1);
 786
 787                 local_irq_restore(flags);
 788                 break;
 789         case SNDRV_PCM_TRIGGER_STOP:
 790         case SNDRV_PCM_TRIGGER_SUSPEND:
 791         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 792                 local_irq_save(flags);
 793
 794                 if (capture) {
 795                         i2s_rxctrl(i2s, 0);
 796                         i2s_fifo(i2s, FIC_RXFLUSH);
 797                 } else {
 798                         i2s_txctrl(i2s, 0);
 799                         i2s_fifo(i2s, FIC_TXFLUSH);
 800                 }
 801
 802                 local_irq_restore(flags);
 803                 break;
 804         }
 805
 806         return 0;
 807 }
 808
 809 static int i2s_set_clkdiv(struct snd_soc_dai *dai,
 810         int div_id, int div)
 811 {
 812         struct i2s_dai *i2s = to_info(dai);
 813         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 814
 815         switch (div_id) {
 816         case SAMSUNG_I2S_DIV_BCLK:
 817                 if ((any_active(i2s) && div && (get_bfs(i2s) != div))
 818                         || (other && other->bfs && (other->bfs != div))) {
 819                         dev_err(&i2s->pdev->dev,
 820                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 821                         return -EAGAIN;
 822                 }
 823                 i2s->bfs = div;
 824                 break;
 825         default:
 826                 dev_err(&i2s->pdev->dev,
 827                         "Invalid clock divider(%d)\n", div_id);
 828                 return -EINVAL;
 829         }
 830
 831         return 0;
 832 }
 833
 834 static snd_pcm_sframes_t
 835 i2s_delay(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
 836 {
 837         struct i2s_dai *i2s = to_info(dai);
 838         u32 reg = readl(i2s->addr + I2SFIC);
 839         snd_pcm_sframes_t delay;
 840
 841         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 842                 delay = FIC_RXCOUNT(reg);
 843         else if (is_secondary(i2s))
 844                 delay = FICS_TXCOUNT(readl(i2s->addr + I2SFICS));
 845         else
 846                 delay = FIC_TXCOUNT(reg);
 847
 848         return delay;
 849 }
 850
 851 #ifdef CONFIG_PM
 852 static int i2s_suspend(struct snd_soc_dai *dai)
 853 {
 854         struct i2s_dai *i2s = to_info(dai);
 855
 856         if (dai->active) {
 857                 i2s->suspend_i2smod = readl(i2s->addr + I2SMOD);
 858                 i2s->suspend_i2scon = readl(i2s->addr + I2SCON);
 859                 i2s->suspend_i2spsr = readl(i2s->addr + I2SPSR);
 860         }
 861
 862         return 0;
 863 }
 864
 865 static int i2s_resume(struct snd_soc_dai *dai)
 866 {
 867         struct i2s_dai *i2s = to_info(dai);
 868
 869         if (dai->active) {
 870                 writel(i2s->suspend_i2scon, i2s->addr + I2SCON);
 871                 writel(i2s->suspend_i2smod, i2s->addr + I2SMOD);
 872                 writel(i2s->suspend_i2spsr, i2s->addr + I2SPSR);
 873         }
 874
 875         return 0;
 876 }
 877 #else
 878 #define i2s_suspend NULL
 879 #define i2s_resume  NULL
 880 #endif
 881
 882 static int samsung_i2s_dai_probe(struct snd_soc_dai *dai)
 883 {
 884         struct i2s_dai *i2s = to_info(dai);
 885         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 886
 887         if (other && other->clk) /* If this is probe on secondary */
 888                 goto probe_exit;
 889
 890         i2s->addr = ioremap(i2s->base, 0x100);
 891         if (i2s->addr == NULL) {
 892                 dev_err(&i2s->pdev->dev, "cannot ioremap registers\n");
 893                 return -ENXIO;
 894         }
 895
 896         i2s->clk = clk_get(&i2s->pdev->dev, "iis");
 897         if (IS_ERR(i2s->clk)) {
 898                 dev_err(&i2s->pdev->dev, "failed to get i2s_clock\n");
 899                 iounmap(i2s->addr);
 900                 return -ENOENT;
 901         }
 902         clk_prepare_enable(i2s->clk);
 903
 904         if (other) {
 905                 other->addr = i2s->addr;
 906                 other->clk = i2s->clk;
 907         }
 908
 909         if (i2s->quirks & QUIRK_NEED_RSTCLR)
 910                 writel(CON_RSTCLR, i2s->addr + I2SCON);
 911
 912         if (i2s->quirks & QUIRK_SEC_DAI)
 913                 idma_reg_addr_init(i2s->addr,
 914                                         i2s->sec_dai->idma_playback.dma_addr);
 915
 916 probe_exit:
 917         /* Reset any constraint on RFS and BFS */
 918         i2s->rfs = 0;
 919         i2s->bfs = 0;
 920         i2s_txctrl(i2s, 0);
 921         i2s_rxctrl(i2s, 0);
 922         i2s_fifo(i2s, FIC_TXFLUSH);
 923         i2s_fifo(other, FIC_TXFLUSH);
 924         i2s_fifo(i2s, FIC_RXFLUSH);
 925
 926         /* Gate CDCLK by default */
 927         if (!is_opened(other))
 928                 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
 929                                 0, SND_SOC_CLOCK_IN);
 930
 931         return 0;
 932 }
 933
 934 static int samsung_i2s_dai_remove(struct snd_soc_dai *dai)
 935 {
 936         struct i2s_dai *i2s = snd_soc_dai_get_drvdata(dai);
 937         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 938
 939         if (!other || !other->clk) {
 940
 941                 if (i2s->quirks & QUIRK_NEED_RSTCLR)
 942                         writel(0, i2s->addr + I2SCON);
 943
 944                 clk_disable_unprepare(i2s->clk);
 945                 clk_put(i2s->clk);
 946
 947                 iounmap(i2s->addr);
 948         }
 949
 950         i2s->clk = NULL;
 951
 952         return 0;
 953 }
 954
 955 static const struct snd_soc_dai_ops samsung_i2s_dai_ops = {
 956         .trigger = i2s_trigger,
 957         .hw_params = i2s_hw_params,
 958         .set_fmt = i2s_set_fmt,
 959         .set_clkdiv = i2s_set_clkdiv,
 960         .set_sysclk = i2s_set_sysclk,
 961         .startup = i2s_startup,
 962         .shutdown = i2s_shutdown,
 963         .delay = i2s_delay,
 964 };
 965
 966 static const struct snd_soc_component_driver samsung_i2s_component = {
 967         .name           = "samsung-i2s",
 968 };
 969
 970 #define SAMSUNG_I2S_RATES       SNDRV_PCM_RATE_8000_96000
 971
 972 #define SAMSUNG_I2S_FMTS        (SNDRV_PCM_FMTBIT_S8 | \
 973                                         SNDRV_PCM_FMTBIT_S16_LE | \
 974                                         SNDRV_PCM_FMTBIT_S24_LE)
 975
 976 static struct i2s_dai *i2s_alloc_dai(struct platform_device *pdev, bool sec)
 977 {
 978         struct i2s_dai *i2s;
 979         int ret;
 980
 981         i2s = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dai), GFP_KERNEL);
 982         if (i2s == NULL)
 983                 return NULL;
 984
 985         i2s->pdev = pdev;
 986         i2s->pri_dai = NULL;
 987         i2s->sec_dai = NULL;
 988         i2s->i2s_dai_drv.symmetric_rates = 1;
 989         i2s->i2s_dai_drv.probe = samsung_i2s_dai_probe;
 990         i2s->i2s_dai_drv.remove = samsung_i2s_dai_remove;
 991         i2s->i2s_dai_drv.ops = &samsung_i2s_dai_ops;
 992         i2s->i2s_dai_drv.suspend = i2s_suspend;
 993         i2s->i2s_dai_drv.resume = i2s_resume;
 994         i2s->i2s_dai_drv.playback.channels_min = 2;
 995         i2s->i2s_dai_drv.playback.channels_max = 2;
 996         i2s->i2s_dai_drv.playback.rates = SAMSUNG_I2S_RATES;
 997         i2s->i2s_dai_drv.playback.formats = SAMSUNG_I2S_FMTS;
 998
 999         if (!sec) {
1000                 i2s->i2s_dai_drv.capture.channels_min = 1;
1001                 i2s->i2s_dai_drv.capture.channels_max = 2;
1002                 i2s->i2s_dai_drv.capture.rates = SAMSUNG_I2S_RATES;
1003                 i2s->i2s_dai_drv.capture.formats = SAMSUNG_I2S_FMTS;
1004                 dev_set_drvdata(&i2s->pdev->dev, i2s);
1005         } else {        /* Create a new platform_device for Secondary */
1006                 i2s->pdev = platform_device_alloc("samsung-i2s-sec", -1);
1007                 if (IS_ERR(i2s->pdev))
1008                         return NULL;
1009
1010                 platform_set_drvdata(i2s->pdev, i2s);
1011                 ret = platform_device_add(i2s->pdev);
1012                 if (ret < 0)
1013                         return NULL;
1014         }
1015
1016         return i2s;
1017 }
1018
1019 #ifdef CONFIG_OF
1020 static int samsung_i2s_parse_dt_gpio(struct i2s_dai *i2s)
1021 {
1022         struct device *dev = &i2s->pdev->dev;
1023         int index, gpio, ret;
1024
1025         for (index = 0; index < 7; index++) {
1026                 gpio = of_get_gpio(dev->of_node, index);
1027                 if (!gpio_is_valid(gpio)) {
1028                         dev_err(dev, "invalid gpio[%d]: %d\n", index, gpio);
1029                         goto free_gpio;
1030                 }
1031
1032                 ret = gpio_request(gpio, dev_name(dev));
1033                 if (ret) {
1034                         dev_err(dev, "gpio [%d] request failed\n", gpio);
1035                         goto free_gpio;
1036                 }
1037                 i2s->gpios[index] = gpio;
1038         }
1039         return 0;
1040
1041 free_gpio:
1042         while (--index >= 0)
1043                 gpio_free(i2s->gpios[index]);
1044         return -EINVAL;
1045 }
1046
1047 static void samsung_i2s_dt_gpio_free(struct i2s_dai *i2s)
1048 {
1049         unsigned int index;
1050         for (index = 0; index < 7; index++)
1051                 gpio_free(i2s->gpios[index]);
1052 }
1053 #else
1054 static int samsung_i2s_parse_dt_gpio(struct i2s_dai *dai)
1055 {
1056         return -EINVAL;
1057 }
1058
1059 static void samsung_i2s_dt_gpio_free(struct i2s_dai *dai)
1060 {
1061 }
1062
1063 #endif
1064
1065 static const struct of_device_id exynos_i2s_match[];
1066
1067 static inline int samsung_i2s_get_driver_data(struct platform_device *pdev)
1068 {
1069 #ifdef CONFIG_OF
1070         struct samsung_i2s_dai_data *data;
1071         if (pdev->dev.of_node) {
1072                 const struct of_device_id *match;
1073                 match = of_match_node(exynos_i2s_match, pdev->dev.of_node);
1074                 data = (struct samsung_i2s_dai_data *) match->data;
1075                 return data->dai_type;
1076         } else
1077 #endif
1078                 return platform_get_device_id(pdev)->driver_data;
1079 }
1080
1081 #ifdef CONFIG_PM_RUNTIME
1082 static int i2s_runtime_suspend(struct device *dev)
1083 {
1084         struct i2s_dai *i2s = dev_get_drvdata(dev);
1085
1086         clk_disable_unprepare(i2s->clk);
1087
1088         return 0;
1089 }
1090
1091 static int i2s_runtime_resume(struct device *dev)
1092 {
1093         struct i2s_dai *i2s = dev_get_drvdata(dev);
1094
1095         clk_prepare_enable(i2s->clk);
1096
1097         return 0;
1098 }
1099 #endif /* CONFIG_PM_RUNTIME */
1100
1101 static int samsung_i2s_probe(struct platform_device *pdev)
1102 {
1103         struct i2s_dai *pri_dai, *sec_dai = NULL;
1104         struct s3c_audio_pdata *i2s_pdata = pdev->dev.platform_data;
1105         struct samsung_i2s *i2s_cfg = NULL;
1106         struct resource *res;
1107         u32 regs_base, quirks = 0, idma_addr = 0;
1108         struct device_node *np = pdev->dev.of_node;
1109         enum samsung_dai_type samsung_dai_type;
1110         int ret = 0;
1111
1112         /* Call during Seconday interface registration */
1113         samsung_dai_type = samsung_i2s_get_driver_data(pdev);
1114
1115         if (samsung_dai_type == TYPE_SEC) {
1116                 sec_dai = dev_get_drvdata(&pdev->dev);
1117                 if (!sec_dai) {
1118                         dev_err(&pdev->dev, "Unable to get drvdata\n");
1119                         return -EFAULT;
1120                 }
1121                 snd_soc_register_component(&sec_dai->pdev->dev,
1122                                            &samsung_i2s_component,
1123                                            &sec_dai->i2s_dai_drv, 1);
1124                 asoc_dma_platform_register(&pdev->dev);
1125                 return 0;
1126         }
1127
1128         pri_dai = i2s_alloc_dai(pdev, false);
1129         if (!pri_dai) {
1130                 dev_err(&pdev->dev, "Unable to alloc I2S_pri\n");
1131                 return -ENOMEM;
1132         }
1133
1134         if (!np) {
1135                 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1136                 if (!res) {
1137                         dev_err(&pdev->dev,
1138                                 "Unable to get I2S-TX dma resource\n");
1139                         return -ENXIO;
1140                 }
1141                 pri_dai->dma_playback.channel = res->start;
1142
1143                 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1144                 if (!res) {
1145                         dev_err(&pdev->dev,
1146                                 "Unable to get I2S-RX dma resource\n");
1147                         return -ENXIO;
1148                 }
1149                 pri_dai->dma_capture.channel = res->start;
1150
1151                 if (i2s_pdata == NULL) {
1152                         dev_err(&pdev->dev, "Can't work without s3c_audio_pdata\n");
1153                         return -EINVAL;
1154                 }
1155
1156                 if (&i2s_pdata->type)
1157                         i2s_cfg = &i2s_pdata->type.i2s;
1158
1159                 if (i2s_cfg) {
1160                         quirks = i2s_cfg->quirks;
1161                         idma_addr = i2s_cfg->idma_addr;
1162                 }
1163         } else {
1164                 if (of_find_property(np, "samsung,supports-6ch", NULL))
1165                         quirks |= QUIRK_PRI_6CHAN;
1166
1167                 if (of_find_property(np, "samsung,supports-secdai", NULL))
1168                         quirks |= QUIRK_SEC_DAI;
1169
1170                 if (of_find_property(np, "samsung,supports-rstclr", NULL))
1171                         quirks |= QUIRK_NEED_RSTCLR;
1172
1173                 if (of_property_read_u32(np, "samsung,idma-addr",
1174                                          &idma_addr)) {
1175                         if (quirks & QUIRK_SEC_DAI) {
1176                                 dev_err(&pdev->dev, "idma address is not"\
1177                                                 "specified");
1178                                 return -EINVAL;
1179                         }
1180                 }
1181         }
1182
1183         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1184         if (!res) {
1185                 dev_err(&pdev->dev, "Unable to get I2S SFR address\n");
1186                 return -ENXIO;
1187         }
1188
1189         if (!request_mem_region(res->start, resource_size(res),
1190                                                         "samsung-i2s")) {
1191                 dev_err(&pdev->dev, "Unable to request SFR region\n");
1192                 return -EBUSY;
1193         }
1194         regs_base = res->start;
1195
1196         pri_dai->dma_playback.dma_addr = regs_base + I2STXD;
1197         pri_dai->dma_capture.dma_addr = regs_base + I2SRXD;
1198         pri_dai->dma_playback.client =
1199                 (struct s3c2410_dma_client *)&pri_dai->dma_playback;
1200         pri_dai->dma_playback.ch_name = "tx";
1201         pri_dai->dma_capture.client =
1202                 (struct s3c2410_dma_client *)&pri_dai->dma_capture;
1203         pri_dai->dma_capture.ch_name = "rx";
1204         pri_dai->dma_playback.dma_size = 4;
1205         pri_dai->dma_capture.dma_size = 4;
1206         pri_dai->base = regs_base;
1207         pri_dai->quirks = quirks;
1208
1209         if (quirks & QUIRK_PRI_6CHAN)
1210                 pri_dai->i2s_dai_drv.playback.channels_max = 6;
1211
1212         if (quirks & QUIRK_SEC_DAI) {
1213                 sec_dai = i2s_alloc_dai(pdev, true);
1214                 if (!sec_dai) {
1215                         dev_err(&pdev->dev, "Unable to alloc I2S_sec\n");
1216                         ret = -ENOMEM;
1217                         goto err;
1218                 }
1219                 sec_dai->dma_playback.dma_addr = regs_base + I2STXDS;
1220                 sec_dai->dma_playback.client =
1221                         (struct s3c2410_dma_client *)&sec_dai->dma_playback;
1222                 sec_dai->dma_playback.ch_name = "tx-sec";
1223
1224                 if (!np) {
1225                         res = platform_get_resource(pdev, IORESOURCE_DMA, 2);
1226                         if (res)
1227                                 sec_dai->dma_playback.channel = res->start;
1228                 }
1229
1230                 sec_dai->dma_playback.dma_size = 4;
1231                 sec_dai->base = regs_base;
1232                 sec_dai->quirks = quirks;
1233                 sec_dai->idma_playback.dma_addr = idma_addr;
1234                 sec_dai->pri_dai = pri_dai;
1235                 pri_dai->sec_dai = sec_dai;
1236         }
1237
1238         if (np) {
1239                 if (samsung_i2s_parse_dt_gpio(pri_dai)) {
1240                         dev_err(&pdev->dev, "Unable to configure gpio\n");
1241                         ret = -EINVAL;
1242                         goto err;
1243                 }
1244         } else {
1245                 if (i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
1246                         dev_err(&pdev->dev, "Unable to configure gpio\n");
1247                         ret = -EINVAL;
1248                         goto err;
1249                 }
1250         }
1251
1252         snd_soc_register_component(&pri_dai->pdev->dev, &samsung_i2s_component,
1253                                    &pri_dai->i2s_dai_drv, 1);
1254
1255         pm_runtime_enable(&pdev->dev);
1256
1257         asoc_dma_platform_register(&pdev->dev);
1258
1259         return 0;
1260 err:
1261         release_mem_region(regs_base, resource_size(res));
1262
1263         return ret;
1264 }
1265
1266 static int samsung_i2s_remove(struct platform_device *pdev)
1267 {
1268         struct i2s_dai *i2s, *other;
1269         struct resource *res;
1270         struct s3c_audio_pdata *i2s_pdata = pdev->dev.platform_data;
1271
1272         i2s = dev_get_drvdata(&pdev->dev);
1273         other = i2s->pri_dai ? : i2s->sec_dai;
1274
1275         if (!i2s_pdata->cfg_gpio && pdev->dev.of_node)
1276                 samsung_i2s_dt_gpio_free(i2s->pri_dai);
1277
1278         if (other) {
1279                 other->pri_dai = NULL;
1280                 other->sec_dai = NULL;
1281         } else {
1282                 pm_runtime_disable(&pdev->dev);
1283                 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1284                 if (res)
1285                         release_mem_region(res->start, resource_size(res));
1286         }
1287
1288         i2s->pri_dai = NULL;
1289         i2s->sec_dai = NULL;
1290
1291         asoc_dma_platform_unregister(&pdev->dev);
1292         snd_soc_unregister_component(&pdev->dev);
1293
1294         return 0;
1295 }
1296
1297 static struct platform_device_id samsung_i2s_driver_ids[] = {
1298         {
1299                 .name           = "samsung-i2s",
1300                 .driver_data    = TYPE_PRI,
1301         }, {
1302                 .name           = "samsung-i2s-sec",
1303                 .driver_data    = TYPE_SEC,
1304         },
1305         {},
1306 };
1307 MODULE_DEVICE_TABLE(platform, samsung_i2s_driver_ids);
1308
1309 #ifdef CONFIG_OF
1310 static struct samsung_i2s_dai_data samsung_i2s_dai_data_array[] = {
1311         [TYPE_PRI] = { TYPE_PRI },
1312         [TYPE_SEC] = { TYPE_SEC },
1313 };
1314
1315 static const struct of_device_id exynos_i2s_match[] = {
1316         { .compatible = "samsung,i2s-v5",
1317           .data = &samsung_i2s_dai_data_array[TYPE_PRI],
1318         },
1319         {},
1320 };
1321 MODULE_DEVICE_TABLE(of, exynos_i2s_match);
1322 #endif
1323
1324 static const struct dev_pm_ops samsung_i2s_pm = {
1325         SET_RUNTIME_PM_OPS(i2s_runtime_suspend,
1326                                 i2s_runtime_resume, NULL)
1327 };
1328
1329 static struct platform_driver samsung_i2s_driver = {
1330         .probe  = samsung_i2s_probe,
1331         .remove = samsung_i2s_remove,
1332         .id_table = samsung_i2s_driver_ids,
1333         .driver = {
1334                 .name = "samsung-i2s",
1335                 .owner = THIS_MODULE,
1336                 .of_match_table = of_match_ptr(exynos_i2s_match),
1337                 .pm = &samsung_i2s_pm,
1338         },
1339 };
1340
1341 module_platform_driver(samsung_i2s_driver);
1342
1343 /* Module information */
1344 MODULE_AUTHOR("Jaswinder Singh, <jassisinghbrar@gmail.com>");
1345 MODULE_DESCRIPTION("Samsung I2S Interface");
1346 MODULE_ALIAS("platform:samsung-i2s");
1347 MODULE_LICENSE("GPL");