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 <linux/platform_data/asoc-s3c.h>
  26
  27 #include "dma.h"
  28 #include "idma.h"
  29 #include "i2s.h"
  30 #include "i2s-regs.h"
  31
  32 #define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
  33
  34 enum samsung_dai_type {
  35         TYPE_PRI,
  36         TYPE_SEC,
  37 };
  38
  39 struct samsung_i2s_dai_data {
  40         int dai_type;
  41         u32 quirks;
  42 };
  43
  44 struct i2s_dai {
  45         /* Platform device for this DAI */
  46         struct platform_device *pdev;
  47         /* IOREMAP'd SFRs */
  48         void __iomem    *addr;
  49         /* Physical base address of SFRs */
  50         u32     base;
  51         /* Rate of RCLK source clock */
  52         unsigned long rclk_srcrate;
  53         /* Frame Clock */
  54         unsigned frmclk;
  55         /*
  56          * Specifically requested RCLK,BCLK by MACHINE Driver.
  57          * 0 indicates CPU driver is free to choose any value.
  58          */
  59         unsigned rfs, bfs;
  60         /* I2S Controller's core clock */
  61         struct clk *clk;
  62         /* Clock for generating I2S signals */
  63         struct clk *op_clk;
  64         /* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */
  65         struct i2s_dai *pri_dai;
  66         /* Pointer to the Secondary_Fifo if it has one, NULL otherwise */
  67         struct i2s_dai *sec_dai;
  68 #define DAI_OPENED      (1 << 0) /* Dai is opened */
  69 #define DAI_MANAGER     (1 << 1) /* Dai is the manager */
  70         unsigned mode;
  71         /* CDCLK pin direction: 0  - input, 1 - output */
  72         unsigned int cdclk_out:1;
  73         /* Driver for this DAI */
  74         struct snd_soc_dai_driver i2s_dai_drv;
  75         /* DMA parameters */
  76         struct s3c_dma_params dma_playback;
  77         struct s3c_dma_params dma_capture;
  78         struct s3c_dma_params idma_playback;
  79         u32     quirks;
  80         u32     suspend_i2smod;
  81         u32     suspend_i2scon;
  82         u32     suspend_i2spsr;
  83         unsigned long gpios[7]; /* i2s gpio line numbers */
  84 };
  85
  86 /* Lock for cross i/f checks */
  87 static DEFINE_SPINLOCK(lock);
  88
  89 /* If this is the 'overlay' stereo DAI */
  90 static inline bool is_secondary(struct i2s_dai *i2s)
  91 {
  92         return i2s->pri_dai ? true : false;
  93 }
  94
  95 /* If operating in SoC-Slave mode */
  96 static inline bool is_slave(struct i2s_dai *i2s)
  97 {
  98         return (readl(i2s->addr + I2SMOD) & MOD_SLAVE) ? true : false;
  99 }
 100
 101 /* If this interface of the controller is transmitting data */
 102 static inline bool tx_active(struct i2s_dai *i2s)
 103 {
 104         u32 active;
 105
 106         if (!i2s)
 107                 return false;
 108
 109         active = readl(i2s->addr + I2SCON);
 110
 111         if (is_secondary(i2s))
 112                 active &= CON_TXSDMA_ACTIVE;
 113         else
 114                 active &= CON_TXDMA_ACTIVE;
 115
 116         return active ? true : false;
 117 }
 118
 119 /* If the other interface of the controller is transmitting data */
 120 static inline bool other_tx_active(struct i2s_dai *i2s)
 121 {
 122         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 123
 124         return tx_active(other);
 125 }
 126
 127 /* If any interface of the controller is transmitting data */
 128 static inline bool any_tx_active(struct i2s_dai *i2s)
 129 {
 130         return tx_active(i2s) || other_tx_active(i2s);
 131 }
 132
 133 /* If this interface of the controller is receiving data */
 134 static inline bool rx_active(struct i2s_dai *i2s)
 135 {
 136         u32 active;
 137
 138         if (!i2s)
 139                 return false;
 140
 141         active = readl(i2s->addr + I2SCON) & CON_RXDMA_ACTIVE;
 142
 143         return active ? true : false;
 144 }
 145
 146 /* If the other interface of the controller is receiving data */
 147 static inline bool other_rx_active(struct i2s_dai *i2s)
 148 {
 149         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 150
 151         return rx_active(other);
 152 }
 153
 154 /* If any interface of the controller is receiving data */
 155 static inline bool any_rx_active(struct i2s_dai *i2s)
 156 {
 157         return rx_active(i2s) || other_rx_active(i2s);
 158 }
 159
 160 /* If the other DAI is transmitting or receiving data */
 161 static inline bool other_active(struct i2s_dai *i2s)
 162 {
 163         return other_rx_active(i2s) || other_tx_active(i2s);
 164 }
 165
 166 /* If this DAI is transmitting or receiving data */
 167 static inline bool this_active(struct i2s_dai *i2s)
 168 {
 169         return tx_active(i2s) || rx_active(i2s);
 170 }
 171
 172 /* If the controller is active anyway */
 173 static inline bool any_active(struct i2s_dai *i2s)
 174 {
 175         return this_active(i2s) || other_active(i2s);
 176 }
 177
 178 static inline struct i2s_dai *to_info(struct snd_soc_dai *dai)
 179 {
 180         return snd_soc_dai_get_drvdata(dai);
 181 }
 182
 183 static inline bool is_opened(struct i2s_dai *i2s)
 184 {
 185         if (i2s && (i2s->mode & DAI_OPENED))
 186                 return true;
 187         else
 188                 return false;
 189 }
 190
 191 static inline bool is_manager(struct i2s_dai *i2s)
 192 {
 193         if (is_opened(i2s) && (i2s->mode & DAI_MANAGER))
 194                 return true;
 195         else
 196                 return false;
 197 }
 198
 199 /* Read RCLK of I2S (in multiples of LRCLK) */
 200 static inline unsigned get_rfs(struct i2s_dai *i2s)
 201 {
 202         u32 rfs;
 203
 204         if (i2s->quirks & QUIRK_SUPPORTS_TDM)
 205                 rfs = readl(i2s->addr + I2SMOD) >> EXYNOS5420_MOD_RCLK_SHIFT;
 206         else
 207                 rfs = (readl(i2s->addr + I2SMOD) >> MOD_RCLK_SHIFT);
 208         rfs &= MOD_RCLK_MASK;
 209
 210         switch (rfs) {
 211         case 3: return 768;
 212         case 2: return 384;
 213         case 1: return 512;
 214         default: return 256;
 215         }
 216 }
 217
 218 /* Write RCLK of I2S (in multiples of LRCLK) */
 219 static inline void set_rfs(struct i2s_dai *i2s, unsigned rfs)
 220 {
 221         u32 mod = readl(i2s->addr + I2SMOD);
 222         int rfs_shift;
 223
 224         if (i2s->quirks & QUIRK_SUPPORTS_TDM)
 225                 rfs_shift = EXYNOS5420_MOD_RCLK_SHIFT;
 226         else
 227                 rfs_shift = MOD_RCLK_SHIFT;
 228         mod &= ~(MOD_RCLK_MASK << rfs_shift);
 229
 230         switch (rfs) {
 231         case 768:
 232                 mod |= (MOD_RCLK_768FS << rfs_shift);
 233                 break;
 234         case 512:
 235                 mod |= (MOD_RCLK_512FS << rfs_shift);
 236                 break;
 237         case 384:
 238                 mod |= (MOD_RCLK_384FS << rfs_shift);
 239                 break;
 240         default:
 241                 mod |= (MOD_RCLK_256FS << rfs_shift);
 242                 break;
 243         }
 244
 245         writel(mod, i2s->addr + I2SMOD);
 246 }
 247
 248 /* Read Bit-Clock of I2S (in multiples of LRCLK) */
 249 static inline unsigned get_bfs(struct i2s_dai *i2s)
 250 {
 251         u32 bfs;
 252
 253         if (i2s->quirks & QUIRK_SUPPORTS_TDM) {
 254                 bfs = readl(i2s->addr + I2SMOD) >> EXYNOS5420_MOD_BCLK_SHIFT;
 255                 bfs &= EXYNOS5420_MOD_BCLK_MASK;
 256         } else {
 257                 bfs =  readl(i2s->addr + I2SMOD) >> MOD_BCLK_SHIFT;
 258                 bfs &= MOD_BCLK_MASK;
 259         }
 260
 261         switch (bfs) {
 262         case 8: return 256;
 263         case 7: return 192;
 264         case 6: return 128;
 265         case 5: return 96;
 266         case 4: return 64;
 267         case 3: return 24;
 268         case 2: return 16;
 269         case 1: return 48;
 270         default: return 32;
 271         }
 272 }
 273
 274 /* Write Bit-Clock of I2S (in multiples of LRCLK) */
 275 static inline void set_bfs(struct i2s_dai *i2s, unsigned bfs)
 276 {
 277         u32 mod = readl(i2s->addr + I2SMOD);
 278         int bfs_shift;
 279         int tdm = i2s->quirks & QUIRK_SUPPORTS_TDM;
 280
 281         if (i2s->quirks & QUIRK_SUPPORTS_TDM) {
 282                 bfs_shift = EXYNOS5420_MOD_BCLK_SHIFT;
 283                 mod &= ~(EXYNOS5420_MOD_BCLK_MASK << bfs_shift);
 284         } else {
 285                 bfs_shift = MOD_BCLK_SHIFT;
 286                 mod &= ~(MOD_BCLK_MASK << bfs_shift);
 287         }
 288
 289         /* Non-TDM I2S controllers do not support BCLK > 48 * FS */
 290         if (!tdm && bfs > 48) {
 291                 dev_err(&i2s->pdev->dev, "Unsupported BCLK divider\n");
 292                 return;
 293         }
 294
 295         switch (bfs) {
 296         case 48:
 297                 mod |= (MOD_BCLK_48FS << bfs_shift);
 298                 break;
 299         case 32:
 300                 mod |= (MOD_BCLK_32FS << bfs_shift);
 301                 break;
 302         case 24:
 303                 mod |= (MOD_BCLK_24FS << bfs_shift);
 304                 break;
 305         case 16:
 306                 mod |= (MOD_BCLK_16FS << bfs_shift);
 307                 break;
 308         case 64:
 309                 mod |= (EXYNOS5420_MOD_BCLK_64FS << bfs_shift);
 310                 break;
 311         case 96:
 312                 mod |= (EXYNOS5420_MOD_BCLK_96FS << bfs_shift);
 313                 break;
 314         case 128:
 315                 mod |= (EXYNOS5420_MOD_BCLK_128FS << bfs_shift);
 316                 break;
 317         case 192:
 318                 mod |= (EXYNOS5420_MOD_BCLK_192FS << bfs_shift);
 319                 break;
 320         case 256:
 321                 mod |= (EXYNOS5420_MOD_BCLK_256FS << bfs_shift);
 322                 break;
 323         default:
 324                 dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n");
 325                 return;
 326         }
 327
 328         writel(mod, i2s->addr + I2SMOD);
 329 }
 330
 331 /* Sample-Size */
 332 static inline int get_blc(struct i2s_dai *i2s)
 333 {
 334         int blc = readl(i2s->addr + I2SMOD);
 335
 336         blc = (blc >> 13) & 0x3;
 337
 338         switch (blc) {
 339         case 2: return 24;
 340         case 1: return 8;
 341         default: return 16;
 342         }
 343 }
 344
 345 /* TX Channel Control */
 346 static void i2s_txctrl(struct i2s_dai *i2s, int on)
 347 {
 348         void __iomem *addr = i2s->addr;
 349         u32 con = readl(addr + I2SCON);
 350         u32 mod = readl(addr + I2SMOD) & ~MOD_MASK;
 351
 352         if (on) {
 353                 con |= CON_ACTIVE;
 354                 con &= ~CON_TXCH_PAUSE;
 355
 356                 if (is_secondary(i2s)) {
 357                         con |= CON_TXSDMA_ACTIVE;
 358                         con &= ~CON_TXSDMA_PAUSE;
 359                 } else {
 360                         con |= CON_TXDMA_ACTIVE;
 361                         con &= ~CON_TXDMA_PAUSE;
 362                 }
 363
 364                 if (any_rx_active(i2s))
 365                         mod |= MOD_TXRX;
 366                 else
 367                         mod |= MOD_TXONLY;
 368         } else {
 369                 if (is_secondary(i2s)) {
 370                         con |=  CON_TXSDMA_PAUSE;
 371                         con &= ~CON_TXSDMA_ACTIVE;
 372                 } else {
 373                         con |=  CON_TXDMA_PAUSE;
 374                         con &= ~CON_TXDMA_ACTIVE;
 375                 }
 376
 377                 if (other_tx_active(i2s)) {
 378                         writel(con, addr + I2SCON);
 379                         return;
 380                 }
 381
 382                 con |=  CON_TXCH_PAUSE;
 383
 384                 if (any_rx_active(i2s))
 385                         mod |= MOD_RXONLY;
 386                 else
 387                         con &= ~CON_ACTIVE;
 388         }
 389
 390         writel(mod, addr + I2SMOD);
 391         writel(con, addr + I2SCON);
 392 }
 393
 394 /* RX Channel Control */
 395 static void i2s_rxctrl(struct i2s_dai *i2s, int on)
 396 {
 397         void __iomem *addr = i2s->addr;
 398         u32 con = readl(addr + I2SCON);
 399         u32 mod = readl(addr + I2SMOD) & ~MOD_MASK;
 400
 401         if (on) {
 402                 con |= CON_RXDMA_ACTIVE | CON_ACTIVE;
 403                 con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE);
 404
 405                 if (any_tx_active(i2s))
 406                         mod |= MOD_TXRX;
 407                 else
 408                         mod |= MOD_RXONLY;
 409         } else {
 410                 con |=  CON_RXDMA_PAUSE | CON_RXCH_PAUSE;
 411                 con &= ~CON_RXDMA_ACTIVE;
 412
 413                 if (any_tx_active(i2s))
 414                         mod |= MOD_TXONLY;
 415                 else
 416                         con &= ~CON_ACTIVE;
 417         }
 418
 419         writel(mod, addr + I2SMOD);
 420         writel(con, addr + I2SCON);
 421 }
 422
 423 /* Flush FIFO of an interface */
 424 static inline void i2s_fifo(struct i2s_dai *i2s, u32 flush)
 425 {
 426         void __iomem *fic;
 427         u32 val;
 428
 429         if (!i2s)
 430                 return;
 431
 432         if (is_secondary(i2s))
 433                 fic = i2s->addr + I2SFICS;
 434         else
 435                 fic = i2s->addr + I2SFIC;
 436
 437         /* Flush the FIFO */
 438         writel(readl(fic) | flush, fic);
 439
 440         /* Be patient */
 441         val = msecs_to_loops(1) / 1000; /* 1 usec */
 442         while (--val)
 443                 cpu_relax();
 444
 445         writel(readl(fic) & ~flush, fic);
 446 }
 447
 448 static int i2s_set_sysclk(struct snd_soc_dai *dai,
 449           int clk_id, unsigned int rfs, int dir)
 450 {
 451         struct i2s_dai *i2s = to_info(dai);
 452         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 453         u32 mod = readl(i2s->addr + I2SMOD);
 454
 455         switch (clk_id) {
 456         case SAMSUNG_I2S_OPCLK:
 457                 mod &= ~MOD_OPCLK_MASK;
 458                 mod |= dir;
 459                 break;
 460         case SAMSUNG_I2S_CDCLK:
 461                 /* Shouldn't matter in GATING(CLOCK_IN) mode */
 462                 if (dir == SND_SOC_CLOCK_IN)
 463                         rfs = 0;
 464
 465                 if ((rfs && other && other->rfs && (other->rfs != rfs)) ||
 466                                 (any_active(i2s) &&
 467                                 (((dir == SND_SOC_CLOCK_IN)
 468                                         && !(mod & MOD_CDCLKCON)) ||
 469                                 ((dir == SND_SOC_CLOCK_OUT)
 470                                         && (mod & MOD_CDCLKCON))))) {
 471                         dev_err(&i2s->pdev->dev,
 472                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 473                         return -EAGAIN;
 474                 }
 475
 476                 if (dir == SND_SOC_CLOCK_IN)
 477                         mod |= MOD_CDCLKCON;
 478                 else
 479                         mod &= ~MOD_CDCLKCON;
 480
 481                 i2s->rfs = rfs;
 482                 break;
 483
 484         case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */
 485         case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */
 486                 if ((i2s->quirks & QUIRK_NO_MUXPSR)
 487                                 || (clk_id == SAMSUNG_I2S_RCLKSRC_0))
 488                         clk_id = 0;
 489                 else
 490                         clk_id = 1;
 491
 492                 if (!any_active(i2s)) {
 493                         if (i2s->op_clk && !IS_ERR(i2s->op_clk)) {
 494                                 if ((clk_id && !(mod & MOD_IMS_SYSMUX)) ||
 495                                         (!clk_id && (mod & MOD_IMS_SYSMUX))) {
 496                                         clk_disable_unprepare(i2s->op_clk);
 497                                         clk_put(i2s->op_clk);
 498                                 } else {
 499                                         i2s->rclk_srcrate =
 500                                                 clk_get_rate(i2s->op_clk);
 501                                         return 0;
 502                                 }
 503                         }
 504
 505                         if (clk_id)
 506                                 i2s->op_clk = clk_get(&i2s->pdev->dev,
 507                                                 "i2s_opclk1");
 508                         else
 509                                 i2s->op_clk = clk_get(&i2s->pdev->dev,
 510                                                 "i2s_opclk0");
 511
 512                         if (WARN_ON(IS_ERR(i2s->op_clk)))
 513                                 return PTR_ERR(i2s->op_clk);
 514
 515                         clk_prepare_enable(i2s->op_clk);
 516                         i2s->rclk_srcrate = clk_get_rate(i2s->op_clk);
 517
 518                         /* Over-ride the other's */
 519                         if (other) {
 520                                 other->op_clk = i2s->op_clk;
 521                                 other->rclk_srcrate = i2s->rclk_srcrate;
 522                         }
 523                 } else if ((!clk_id && (mod & MOD_IMS_SYSMUX))
 524                                 || (clk_id && !(mod & MOD_IMS_SYSMUX))) {
 525                         dev_err(&i2s->pdev->dev,
 526                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 527                         return -EAGAIN;
 528                 } else {
 529                         /* Call can't be on the active DAI */
 530                         i2s->op_clk = other->op_clk;
 531                         i2s->rclk_srcrate = other->rclk_srcrate;
 532                         return 0;
 533                 }
 534
 535                 if (clk_id == 0)
 536                         mod &= ~MOD_IMS_SYSMUX;
 537                 else
 538                         mod |= MOD_IMS_SYSMUX;
 539                 break;
 540
 541         default:
 542                 dev_err(&i2s->pdev->dev, "We don't serve that!\n");
 543                 return -EINVAL;
 544         }
 545
 546         writel(mod, i2s->addr + I2SMOD);
 547
 548         return 0;
 549 }
 550
 551 static int i2s_set_fmt(struct snd_soc_dai *dai,
 552         unsigned int fmt)
 553 {
 554         struct i2s_dai *i2s = to_info(dai);
 555         u32 mod = readl(i2s->addr + I2SMOD);
 556         int lrp_shift, sdf_shift, sdf_mask, lrp_rlow;
 557         u32 tmp = 0;
 558
 559         if (i2s->quirks & QUIRK_SUPPORTS_TDM) {
 560                 lrp_shift = EXYNOS5420_MOD_LRP_SHIFT;
 561                 sdf_shift = EXYNOS5420_MOD_SDF_SHIFT;
 562         } else {
 563                 lrp_shift = MOD_LRP_SHIFT;
 564                 sdf_shift = MOD_SDF_SHIFT;
 565         }
 566
 567         sdf_mask = MOD_SDF_MASK << sdf_shift;
 568         lrp_rlow = MOD_LR_RLOW << lrp_shift;
 569
 570         /* Format is priority */
 571         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 572         case SND_SOC_DAIFMT_RIGHT_J:
 573                 tmp |= lrp_rlow;
 574                 tmp |= (MOD_SDF_MSB << sdf_shift);
 575                 break;
 576         case SND_SOC_DAIFMT_LEFT_J:
 577                 tmp |= lrp_rlow;
 578                 tmp |= (MOD_SDF_LSB << sdf_shift);
 579                 break;
 580         case SND_SOC_DAIFMT_I2S:
 581                 tmp |= (MOD_SDF_IIS << sdf_shift);
 582                 break;
 583         default:
 584                 dev_err(&i2s->pdev->dev, "Format not supported\n");
 585                 return -EINVAL;
 586         }
 587
 588         /*
 589          * INV flag is relative to the FORMAT flag - if set it simply
 590          * flips the polarity specified by the Standard
 591          */
 592         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 593         case SND_SOC_DAIFMT_NB_NF:
 594                 break;
 595         case SND_SOC_DAIFMT_NB_IF:
 596                 if (tmp & lrp_rlow)
 597                         tmp &= ~lrp_rlow;
 598                 else
 599                         tmp |= lrp_rlow;
 600                 break;
 601         default:
 602                 dev_err(&i2s->pdev->dev, "Polarity not supported\n");
 603                 return -EINVAL;
 604         }
 605
 606         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 607         case SND_SOC_DAIFMT_CBM_CFM:
 608                 tmp |= MOD_SLAVE;
 609                 break;
 610         case SND_SOC_DAIFMT_CBS_CFS:
 611                 /* Set default source clock in Master mode */
 612                 if (i2s->rclk_srcrate == 0)
 613                         i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0,
 614                                                         0, SND_SOC_CLOCK_IN);
 615                 break;
 616         default:
 617                 dev_err(&i2s->pdev->dev, "master/slave format not supported\n");
 618                 return -EINVAL;
 619         }
 620
 621         /*
 622          * Don't change the I2S mode if any controller is active on this
 623          * channel.
 624          */
 625         if (any_active(i2s) &&
 626                 ((mod & (sdf_mask | lrp_rlow | MOD_SLAVE)) != tmp)) {
 627                 dev_err(&i2s->pdev->dev,
 628                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 629                 return -EAGAIN;
 630         }
 631
 632         mod &= ~(sdf_mask | lrp_rlow | MOD_SLAVE);
 633         mod |= tmp;
 634         writel(mod, i2s->addr + I2SMOD);
 635
 636         return 0;
 637 }
 638
 639 static int i2s_hw_params(struct snd_pcm_substream *substream,
 640         struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
 641 {
 642         struct i2s_dai *i2s = to_info(dai);
 643         u32 mod = readl(i2s->addr + I2SMOD);
 644
 645         if (!is_secondary(i2s))
 646                 mod &= ~(MOD_DC2_EN | MOD_DC1_EN);
 647
 648         switch (params_channels(params)) {
 649         case 6:
 650                 mod |= MOD_DC2_EN;
 651         case 4:
 652                 mod |= MOD_DC1_EN;
 653                 break;
 654         case 2:
 655                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 656                         i2s->dma_playback.dma_size = 4;
 657                 else
 658                         i2s->dma_capture.dma_size = 4;
 659                 break;
 660         case 1:
 661                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 662                         i2s->dma_playback.dma_size = 2;
 663                 else
 664                         i2s->dma_capture.dma_size = 2;
 665
 666                 break;
 667         default:
 668                 dev_err(&i2s->pdev->dev, "%d channels not supported\n",
 669                                 params_channels(params));
 670                 return -EINVAL;
 671         }
 672
 673         if (is_secondary(i2s))
 674                 mod &= ~MOD_BLCS_MASK;
 675         else
 676                 mod &= ~MOD_BLCP_MASK;
 677
 678         if (is_manager(i2s))
 679                 mod &= ~MOD_BLC_MASK;
 680
 681         switch (params_width(params)) {
 682         case 8:
 683                 if (is_secondary(i2s))
 684                         mod |= MOD_BLCS_8BIT;
 685                 else
 686                         mod |= MOD_BLCP_8BIT;
 687                 if (is_manager(i2s))
 688                         mod |= MOD_BLC_8BIT;
 689                 break;
 690         case 16:
 691                 if (is_secondary(i2s))
 692                         mod |= MOD_BLCS_16BIT;
 693                 else
 694                         mod |= MOD_BLCP_16BIT;
 695                 if (is_manager(i2s))
 696                         mod |= MOD_BLC_16BIT;
 697                 break;
 698         case 24:
 699                 if (is_secondary(i2s))
 700                         mod |= MOD_BLCS_24BIT;
 701                 else
 702                         mod |= MOD_BLCP_24BIT;
 703                 if (is_manager(i2s))
 704                         mod |= MOD_BLC_24BIT;
 705                 break;
 706         default:
 707                 dev_err(&i2s->pdev->dev, "Format(%d) not supported\n",
 708                                 params_format(params));
 709                 return -EINVAL;
 710         }
 711         writel(mod, i2s->addr + I2SMOD);
 712
 713         samsung_asoc_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture);
 714
 715         i2s->frmclk = params_rate(params);
 716
 717         return 0;
 718 }
 719
 720 /* We set constraints on the substream acc to the version of I2S */
 721 static int i2s_startup(struct snd_pcm_substream *substream,
 722           struct snd_soc_dai *dai)
 723 {
 724         struct i2s_dai *i2s = to_info(dai);
 725         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 726         unsigned long flags;
 727
 728         spin_lock_irqsave(&lock, flags);
 729
 730         i2s->mode |= DAI_OPENED;
 731
 732         if (is_manager(other))
 733                 i2s->mode &= ~DAI_MANAGER;
 734         else
 735                 i2s->mode |= DAI_MANAGER;
 736
 737         if (!any_active(i2s) && (i2s->quirks & QUIRK_NEED_RSTCLR))
 738                 writel(CON_RSTCLR, i2s->addr + I2SCON);
 739
 740         spin_unlock_irqrestore(&lock, flags);
 741
 742         if (!is_opened(other) && i2s->cdclk_out)
 743                 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
 744                                 0, SND_SOC_CLOCK_OUT);
 745         return 0;
 746 }
 747
 748 static void i2s_shutdown(struct snd_pcm_substream *substream,
 749         struct snd_soc_dai *dai)
 750 {
 751         struct i2s_dai *i2s = to_info(dai);
 752         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 753         unsigned long flags;
 754
 755         spin_lock_irqsave(&lock, flags);
 756
 757         i2s->mode &= ~DAI_OPENED;
 758         i2s->mode &= ~DAI_MANAGER;
 759
 760         if (is_opened(other)) {
 761                 other->mode |= DAI_MANAGER;
 762         } else {
 763                 u32 mod = readl(i2s->addr + I2SMOD);
 764                 i2s->cdclk_out = !(mod & MOD_CDCLKCON);
 765                 if (other)
 766                         other->cdclk_out = i2s->cdclk_out;
 767         }
 768         /* Reset any constraint on RFS and BFS */
 769         i2s->rfs = 0;
 770         i2s->bfs = 0;
 771
 772         spin_unlock_irqrestore(&lock, flags);
 773
 774         /* Gate CDCLK by default */
 775         if (!is_opened(other))
 776                 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
 777                                 0, SND_SOC_CLOCK_IN);
 778 }
 779
 780 static int config_setup(struct i2s_dai *i2s)
 781 {
 782         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 783         unsigned rfs, bfs, blc;
 784         u32 psr;
 785
 786         blc = get_blc(i2s);
 787
 788         bfs = i2s->bfs;
 789
 790         if (!bfs && other)
 791                 bfs = other->bfs;
 792
 793         /* Select least possible multiple(2) if no constraint set */
 794         if (!bfs)
 795                 bfs = blc * 2;
 796
 797         rfs = i2s->rfs;
 798
 799         if (!rfs && other)
 800                 rfs = other->rfs;
 801
 802         if ((rfs == 256 || rfs == 512) && (blc == 24)) {
 803                 dev_err(&i2s->pdev->dev,
 804                         "%d-RFS not supported for 24-blc\n", rfs);
 805                 return -EINVAL;
 806         }
 807
 808         if (!rfs) {
 809                 if (bfs == 16 || bfs == 32)
 810                         rfs = 256;
 811                 else
 812                         rfs = 384;
 813         }
 814
 815         /* If already setup and running */
 816         if (any_active(i2s) && (get_rfs(i2s) != rfs || get_bfs(i2s) != bfs)) {
 817                 dev_err(&i2s->pdev->dev,
 818                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 819                 return -EAGAIN;
 820         }
 821
 822         set_bfs(i2s, bfs);
 823         set_rfs(i2s, rfs);
 824
 825         /* Don't bother with PSR in Slave mode */
 826         if (is_slave(i2s))
 827                 return 0;
 828
 829         if (!(i2s->quirks & QUIRK_NO_MUXPSR)) {
 830                 psr = i2s->rclk_srcrate / i2s->frmclk / rfs;
 831                 writel(((psr - 1) << 8) | PSR_PSREN, i2s->addr + I2SPSR);
 832                 dev_dbg(&i2s->pdev->dev,
 833                         "RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n",
 834                                 i2s->rclk_srcrate, psr, rfs, bfs);
 835         }
 836
 837         return 0;
 838 }
 839
 840 static int i2s_trigger(struct snd_pcm_substream *substream,
 841         int cmd, struct snd_soc_dai *dai)
 842 {
 843         int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
 844         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 845         struct i2s_dai *i2s = to_info(rtd->cpu_dai);
 846         unsigned long flags;
 847
 848         switch (cmd) {
 849         case SNDRV_PCM_TRIGGER_START:
 850         case SNDRV_PCM_TRIGGER_RESUME:
 851         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 852                 local_irq_save(flags);
 853
 854                 if (config_setup(i2s)) {
 855                         local_irq_restore(flags);
 856                         return -EINVAL;
 857                 }
 858
 859                 if (capture)
 860                         i2s_rxctrl(i2s, 1);
 861                 else
 862                         i2s_txctrl(i2s, 1);
 863
 864                 local_irq_restore(flags);
 865                 break;
 866         case SNDRV_PCM_TRIGGER_STOP:
 867         case SNDRV_PCM_TRIGGER_SUSPEND:
 868         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 869                 local_irq_save(flags);
 870
 871                 if (capture) {
 872                         i2s_rxctrl(i2s, 0);
 873                         i2s_fifo(i2s, FIC_RXFLUSH);
 874                 } else {
 875                         i2s_txctrl(i2s, 0);
 876                         i2s_fifo(i2s, FIC_TXFLUSH);
 877                 }
 878
 879                 local_irq_restore(flags);
 880                 break;
 881         }
 882
 883         return 0;
 884 }
 885
 886 static int i2s_set_clkdiv(struct snd_soc_dai *dai,
 887         int div_id, int div)
 888 {
 889         struct i2s_dai *i2s = to_info(dai);
 890         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 891
 892         switch (div_id) {
 893         case SAMSUNG_I2S_DIV_BCLK:
 894                 if ((any_active(i2s) && div && (get_bfs(i2s) != div))
 895                         || (other && other->bfs && (other->bfs != div))) {
 896                         dev_err(&i2s->pdev->dev,
 897                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 898                         return -EAGAIN;
 899                 }
 900                 i2s->bfs = div;
 901                 break;
 902         default:
 903                 dev_err(&i2s->pdev->dev,
 904                         "Invalid clock divider(%d)\n", div_id);
 905                 return -EINVAL;
 906         }
 907
 908         return 0;
 909 }
 910
 911 static snd_pcm_sframes_t
 912 i2s_delay(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
 913 {
 914         struct i2s_dai *i2s = to_info(dai);
 915         u32 reg = readl(i2s->addr + I2SFIC);
 916         snd_pcm_sframes_t delay;
 917
 918         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 919                 delay = FIC_RXCOUNT(reg);
 920         else if (is_secondary(i2s))
 921                 delay = FICS_TXCOUNT(readl(i2s->addr + I2SFICS));
 922         else
 923                 delay = FIC_TXCOUNT(reg);
 924
 925         return delay;
 926 }
 927
 928 #ifdef CONFIG_PM
 929 static int i2s_suspend(struct snd_soc_dai *dai)
 930 {
 931         struct i2s_dai *i2s = to_info(dai);
 932
 933         i2s->suspend_i2smod = readl(i2s->addr + I2SMOD);
 934         i2s->suspend_i2scon = readl(i2s->addr + I2SCON);
 935         i2s->suspend_i2spsr = readl(i2s->addr + I2SPSR);
 936
 937         return 0;
 938 }
 939
 940 static int i2s_resume(struct snd_soc_dai *dai)
 941 {
 942         struct i2s_dai *i2s = to_info(dai);
 943
 944         writel(i2s->suspend_i2scon, i2s->addr + I2SCON);
 945         writel(i2s->suspend_i2smod, i2s->addr + I2SMOD);
 946         writel(i2s->suspend_i2spsr, i2s->addr + I2SPSR);
 947
 948         return 0;
 949 }
 950 #else
 951 #define i2s_suspend NULL
 952 #define i2s_resume  NULL
 953 #endif
 954
 955 static int samsung_i2s_dai_probe(struct snd_soc_dai *dai)
 956 {
 957         struct i2s_dai *i2s = to_info(dai);
 958         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 959
 960         if (other && other->clk) { /* If this is probe on secondary */
 961                 samsung_asoc_init_dma_data(dai, &other->sec_dai->dma_playback,
 962                                            NULL);
 963                 goto probe_exit;
 964         }
 965
 966         i2s->addr = ioremap(i2s->base, 0x100);
 967         if (i2s->addr == NULL) {
 968                 dev_err(&i2s->pdev->dev, "cannot ioremap registers\n");
 969                 return -ENXIO;
 970         }
 971
 972         i2s->clk = clk_get(&i2s->pdev->dev, "iis");
 973         if (IS_ERR(i2s->clk)) {
 974                 dev_err(&i2s->pdev->dev, "failed to get i2s_clock\n");
 975                 iounmap(i2s->addr);
 976                 return -ENOENT;
 977         }
 978         clk_prepare_enable(i2s->clk);
 979
 980         samsung_asoc_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture);
 981
 982         if (other) {
 983                 other->addr = i2s->addr;
 984                 other->clk = i2s->clk;
 985         }
 986
 987         if (i2s->quirks & QUIRK_NEED_RSTCLR)
 988                 writel(CON_RSTCLR, i2s->addr + I2SCON);
 989
 990         if (i2s->quirks & QUIRK_SEC_DAI)
 991                 idma_reg_addr_init(i2s->addr,
 992                                         i2s->sec_dai->idma_playback.dma_addr);
 993
 994 probe_exit:
 995         /* Reset any constraint on RFS and BFS */
 996         i2s->rfs = 0;
 997         i2s->bfs = 0;
 998         i2s->rclk_srcrate = 0;
 999         i2s_txctrl(i2s, 0);
1000         i2s_rxctrl(i2s, 0);
1001         i2s_fifo(i2s, FIC_TXFLUSH);
1002         i2s_fifo(other, FIC_TXFLUSH);
1003         i2s_fifo(i2s, FIC_RXFLUSH);
1004
1005         /* Gate CDCLK by default */
1006         if (!is_opened(other))
1007                 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
1008                                 0, SND_SOC_CLOCK_IN);
1009
1010         return 0;
1011 }
1012
1013 static int samsung_i2s_dai_remove(struct snd_soc_dai *dai)
1014 {
1015         struct i2s_dai *i2s = snd_soc_dai_get_drvdata(dai);
1016         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
1017
1018         if (!other || !other->clk) {
1019
1020                 if (i2s->quirks & QUIRK_NEED_RSTCLR)
1021                         writel(0, i2s->addr + I2SCON);
1022
1023                 clk_disable_unprepare(i2s->clk);
1024                 clk_put(i2s->clk);
1025
1026                 iounmap(i2s->addr);
1027         }
1028
1029         i2s->clk = NULL;
1030
1031         return 0;
1032 }
1033
1034 static const struct snd_soc_dai_ops samsung_i2s_dai_ops = {
1035         .trigger = i2s_trigger,
1036         .hw_params = i2s_hw_params,
1037         .set_fmt = i2s_set_fmt,
1038         .set_clkdiv = i2s_set_clkdiv,
1039         .set_sysclk = i2s_set_sysclk,
1040         .startup = i2s_startup,
1041         .shutdown = i2s_shutdown,
1042         .delay = i2s_delay,
1043 };
1044
1045 static const struct snd_soc_component_driver samsung_i2s_component = {
1046         .name           = "samsung-i2s",
1047 };
1048
1049 #define SAMSUNG_I2S_RATES       SNDRV_PCM_RATE_8000_96000
1050
1051 #define SAMSUNG_I2S_FMTS        (SNDRV_PCM_FMTBIT_S8 | \
1052                                         SNDRV_PCM_FMTBIT_S16_LE | \
1053                                         SNDRV_PCM_FMTBIT_S24_LE)
1054
1055 static struct i2s_dai *i2s_alloc_dai(struct platform_device *pdev, bool sec)
1056 {
1057         struct i2s_dai *i2s;
1058         int ret;
1059
1060         i2s = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dai), GFP_KERNEL);
1061         if (i2s == NULL)
1062                 return NULL;
1063
1064         i2s->pdev = pdev;
1065         i2s->pri_dai = NULL;
1066         i2s->sec_dai = NULL;
1067         i2s->i2s_dai_drv.symmetric_rates = 1;
1068         i2s->i2s_dai_drv.probe = samsung_i2s_dai_probe;
1069         i2s->i2s_dai_drv.remove = samsung_i2s_dai_remove;
1070         i2s->i2s_dai_drv.ops = &samsung_i2s_dai_ops;
1071         i2s->i2s_dai_drv.suspend = i2s_suspend;
1072         i2s->i2s_dai_drv.resume = i2s_resume;
1073         i2s->i2s_dai_drv.playback.channels_min = 1;
1074         i2s->i2s_dai_drv.playback.channels_max = 2;
1075         i2s->i2s_dai_drv.playback.rates = SAMSUNG_I2S_RATES;
1076         i2s->i2s_dai_drv.playback.formats = SAMSUNG_I2S_FMTS;
1077
1078         if (!sec) {
1079                 i2s->i2s_dai_drv.capture.channels_min = 1;
1080                 i2s->i2s_dai_drv.capture.channels_max = 2;
1081                 i2s->i2s_dai_drv.capture.rates = SAMSUNG_I2S_RATES;
1082                 i2s->i2s_dai_drv.capture.formats = SAMSUNG_I2S_FMTS;
1083                 dev_set_drvdata(&i2s->pdev->dev, i2s);
1084         } else {        /* Create a new platform_device for Secondary */
1085                 i2s->pdev = platform_device_alloc("samsung-i2s-sec", -1);
1086                 if (!i2s->pdev)
1087                         return NULL;
1088
1089                 i2s->pdev->dev.parent = &pdev->dev;
1090
1091                 platform_set_drvdata(i2s->pdev, i2s);
1092                 ret = platform_device_add(i2s->pdev);
1093                 if (ret < 0)
1094                         return NULL;
1095         }
1096
1097         return i2s;
1098 }
1099
1100 static const struct of_device_id exynos_i2s_match[];
1101
1102 static inline const struct samsung_i2s_dai_data *samsung_i2s_get_driver_data(
1103                                                 struct platform_device *pdev)
1104 {
1105 #ifdef CONFIG_OF
1106         if (pdev->dev.of_node) {
1107                 const struct of_device_id *match;
1108                 match = of_match_node(exynos_i2s_match, pdev->dev.of_node);
1109                 return match->data;
1110         } else
1111 #endif
1112                 return (struct samsung_i2s_dai_data *)
1113                                 platform_get_device_id(pdev)->driver_data;
1114 }
1115
1116 #ifdef CONFIG_PM_RUNTIME
1117 static int i2s_runtime_suspend(struct device *dev)
1118 {
1119         struct i2s_dai *i2s = dev_get_drvdata(dev);
1120
1121         clk_disable_unprepare(i2s->clk);
1122
1123         return 0;
1124 }
1125
1126 static int i2s_runtime_resume(struct device *dev)
1127 {
1128         struct i2s_dai *i2s = dev_get_drvdata(dev);
1129
1130         clk_prepare_enable(i2s->clk);
1131
1132         return 0;
1133 }
1134 #endif /* CONFIG_PM_RUNTIME */
1135
1136 static int samsung_i2s_probe(struct platform_device *pdev)
1137 {
1138         struct i2s_dai *pri_dai, *sec_dai = NULL;
1139         struct s3c_audio_pdata *i2s_pdata = pdev->dev.platform_data;
1140         struct samsung_i2s *i2s_cfg = NULL;
1141         struct resource *res;
1142         u32 regs_base, quirks = 0, idma_addr = 0;
1143         struct device_node *np = pdev->dev.of_node;
1144         const struct samsung_i2s_dai_data *i2s_dai_data;
1145         int ret = 0;
1146
1147         /* Call during Seconday interface registration */
1148         i2s_dai_data = samsung_i2s_get_driver_data(pdev);
1149
1150         if (i2s_dai_data->dai_type == TYPE_SEC) {
1151                 sec_dai = dev_get_drvdata(&pdev->dev);
1152                 if (!sec_dai) {
1153                         dev_err(&pdev->dev, "Unable to get drvdata\n");
1154                         return -EFAULT;
1155                 }
1156                 devm_snd_soc_register_component(&sec_dai->pdev->dev,
1157                                                 &samsung_i2s_component,
1158                                                 &sec_dai->i2s_dai_drv, 1);
1159                 samsung_asoc_dma_platform_register(&pdev->dev);
1160                 return 0;
1161         }
1162
1163         pri_dai = i2s_alloc_dai(pdev, false);
1164         if (!pri_dai) {
1165                 dev_err(&pdev->dev, "Unable to alloc I2S_pri\n");
1166                 return -ENOMEM;
1167         }
1168
1169         if (!np) {
1170                 res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1171                 if (!res) {
1172                         dev_err(&pdev->dev,
1173                                 "Unable to get I2S-TX dma resource\n");
1174                         return -ENXIO;
1175                 }
1176                 pri_dai->dma_playback.channel = res->start;
1177
1178                 res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1179                 if (!res) {
1180                         dev_err(&pdev->dev,
1181                                 "Unable to get I2S-RX dma resource\n");
1182                         return -ENXIO;
1183                 }
1184                 pri_dai->dma_capture.channel = res->start;
1185
1186                 if (i2s_pdata == NULL) {
1187                         dev_err(&pdev->dev, "Can't work without s3c_audio_pdata\n");
1188                         return -EINVAL;
1189                 }
1190
1191                 if (&i2s_pdata->type)
1192                         i2s_cfg = &i2s_pdata->type.i2s;
1193
1194                 if (i2s_cfg) {
1195                         quirks = i2s_cfg->quirks;
1196                         idma_addr = i2s_cfg->idma_addr;
1197                 }
1198         } else {
1199                 quirks = i2s_dai_data->quirks;
1200                 if (of_property_read_u32(np, "samsung,idma-addr",
1201                                          &idma_addr)) {
1202                         if (quirks & QUIRK_SEC_DAI) {
1203                                 dev_err(&pdev->dev, "idma address is not"\
1204                                                 "specified");
1205                                 return -EINVAL;
1206                         }
1207                 }
1208         }
1209
1210         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1211         if (!res) {
1212                 dev_err(&pdev->dev, "Unable to get I2S SFR address\n");
1213                 return -ENXIO;
1214         }
1215
1216         if (!request_mem_region(res->start, resource_size(res),
1217                                                         "samsung-i2s")) {
1218                 dev_err(&pdev->dev, "Unable to request SFR region\n");
1219                 return -EBUSY;
1220         }
1221         regs_base = res->start;
1222
1223         pri_dai->dma_playback.dma_addr = regs_base + I2STXD;
1224         pri_dai->dma_capture.dma_addr = regs_base + I2SRXD;
1225         pri_dai->dma_playback.ch_name = "tx";
1226         pri_dai->dma_capture.ch_name = "rx";
1227         pri_dai->dma_playback.dma_size = 4;
1228         pri_dai->dma_capture.dma_size = 4;
1229         pri_dai->base = regs_base;
1230         pri_dai->quirks = quirks;
1231
1232         if (quirks & QUIRK_PRI_6CHAN)
1233                 pri_dai->i2s_dai_drv.playback.channels_max = 6;
1234
1235         if (quirks & QUIRK_SEC_DAI) {
1236                 sec_dai = i2s_alloc_dai(pdev, true);
1237                 if (!sec_dai) {
1238                         dev_err(&pdev->dev, "Unable to alloc I2S_sec\n");
1239                         ret = -ENOMEM;
1240                         goto err;
1241                 }
1242                 sec_dai->dma_playback.dma_addr = regs_base + I2STXDS;
1243                 sec_dai->dma_playback.ch_name = "tx-sec";
1244
1245                 if (!np) {
1246                         res = platform_get_resource(pdev, IORESOURCE_DMA, 2);
1247                         if (res)
1248                                 sec_dai->dma_playback.channel = res->start;
1249                 }
1250
1251                 sec_dai->dma_playback.dma_size = 4;
1252                 sec_dai->base = regs_base;
1253                 sec_dai->quirks = quirks;
1254                 sec_dai->idma_playback.dma_addr = idma_addr;
1255                 sec_dai->pri_dai = pri_dai;
1256                 pri_dai->sec_dai = sec_dai;
1257         }
1258
1259         if (i2s_pdata && i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
1260                 dev_err(&pdev->dev, "Unable to configure gpio\n");
1261                 ret = -EINVAL;
1262                 goto err;
1263         }
1264
1265         devm_snd_soc_register_component(&pri_dai->pdev->dev,
1266                                         &samsung_i2s_component,
1267                                         &pri_dai->i2s_dai_drv, 1);
1268
1269         pm_runtime_enable(&pdev->dev);
1270
1271         samsung_asoc_dma_platform_register(&pdev->dev);
1272
1273         return 0;
1274 err:
1275         if (res)
1276                 release_mem_region(regs_base, resource_size(res));
1277
1278         return ret;
1279 }
1280
1281 static int samsung_i2s_remove(struct platform_device *pdev)
1282 {
1283         struct i2s_dai *i2s, *other;
1284         struct resource *res;
1285
1286         i2s = dev_get_drvdata(&pdev->dev);
1287         other = i2s->pri_dai ? : i2s->sec_dai;
1288
1289         if (other) {
1290                 other->pri_dai = NULL;
1291                 other->sec_dai = NULL;
1292         } else {
1293                 pm_runtime_disable(&pdev->dev);
1294                 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1295                 if (res)
1296                         release_mem_region(res->start, resource_size(res));
1297         }
1298
1299         i2s->pri_dai = NULL;
1300         i2s->sec_dai = NULL;
1301
1302         return 0;
1303 }
1304
1305 static const struct samsung_i2s_dai_data i2sv3_dai_type = {
1306         .dai_type = TYPE_PRI,
1307         .quirks = QUIRK_NO_MUXPSR,
1308 };
1309
1310 static const struct samsung_i2s_dai_data i2sv5_dai_type = {
1311         .dai_type = TYPE_PRI,
1312         .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR,
1313 };
1314
1315 static const struct samsung_i2s_dai_data i2sv6_dai_type = {
1316         .dai_type = TYPE_PRI,
1317         .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1318                         QUIRK_SUPPORTS_TDM,
1319 };
1320
1321 static const struct samsung_i2s_dai_data samsung_dai_type_pri = {
1322         .dai_type = TYPE_PRI,
1323 };
1324
1325 static const struct samsung_i2s_dai_data samsung_dai_type_sec = {
1326         .dai_type = TYPE_SEC,
1327 };
1328
1329 static struct platform_device_id samsung_i2s_driver_ids[] = {
1330         {
1331                 .name           = "samsung-i2s",
1332                 .driver_data    = (kernel_ulong_t)&samsung_dai_type_pri,
1333         }, {
1334                 .name           = "samsung-i2s-sec",
1335                 .driver_data    = (kernel_ulong_t)&samsung_dai_type_sec,
1336         },
1337         {},
1338 };
1339 MODULE_DEVICE_TABLE(platform, samsung_i2s_driver_ids);
1340
1341 #ifdef CONFIG_OF
1342 static const struct of_device_id exynos_i2s_match[] = {
1343         {
1344                 .compatible = "samsung,s3c6410-i2s",
1345                 .data = &i2sv3_dai_type,
1346         }, {
1347                 .compatible = "samsung,s5pv210-i2s",
1348                 .data = &i2sv5_dai_type,
1349         }, {
1350                 .compatible = "samsung,exynos5420-i2s",
1351                 .data = &i2sv6_dai_type,
1352         },
1353         {},
1354 };
1355 MODULE_DEVICE_TABLE(of, exynos_i2s_match);
1356 #endif
1357
1358 static const struct dev_pm_ops samsung_i2s_pm = {
1359         SET_RUNTIME_PM_OPS(i2s_runtime_suspend,
1360                                 i2s_runtime_resume, NULL)
1361 };
1362
1363 static struct platform_driver samsung_i2s_driver = {
1364         .probe  = samsung_i2s_probe,
1365         .remove = samsung_i2s_remove,
1366         .id_table = samsung_i2s_driver_ids,
1367         .driver = {
1368                 .name = "samsung-i2s",
1369                 .owner = THIS_MODULE,
1370                 .of_match_table = of_match_ptr(exynos_i2s_match),
1371                 .pm = &samsung_i2s_pm,
1372         },
1373 };
1374
1375 module_platform_driver(samsung_i2s_driver);
1376
1377 /* Module information */
1378 MODULE_AUTHOR("Jaswinder Singh, <jassisinghbrar@gmail.com>");
1379 MODULE_DESCRIPTION("Samsung I2S Interface");
1380 MODULE_ALIAS("platform:samsung-i2s");
1381 MODULE_LICENSE("GPL");