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 <dt-bindings/sound/samsung-i2s.h>
  14 #include <linux/delay.h>
  15 #include <linux/slab.h>
  16 #include <linux/clk.h>
  17 #include <linux/clk-provider.h>
  18 #include <linux/io.h>
  19 #include <linux/module.h>
  20 #include <linux/of.h>
  21 #include <linux/of_device.h>
  22 #include <linux/of_gpio.h>
  23 #include <linux/pm_runtime.h>
  24
  25 #include <sound/soc.h>
  26 #include <sound/pcm_params.h>
  27
  28 #include <linux/platform_data/asoc-s3c.h>
  29
  30 #include "dma.h"
  31 #include "idma.h"
  32 #include "i2s.h"
  33 #include "i2s-regs.h"
  34
  35 #define msecs_to_loops(t) (loops_per_jiffy / 1000 * HZ * t)
  36
  37 struct samsung_i2s_variant_regs {
  38         unsigned int    bfs_off;
  39         unsigned int    rfs_off;
  40         unsigned int    sdf_off;
  41         unsigned int    txr_off;
  42         unsigned int    rclksrc_off;
  43         unsigned int    mss_off;
  44         unsigned int    cdclkcon_off;
  45         unsigned int    lrp_off;
  46         unsigned int    bfs_mask;
  47         unsigned int    rfs_mask;
  48         unsigned int    ftx0cnt_off;
  49 };
  50
  51 struct samsung_i2s_dai_data {
  52         u32 quirks;
  53         unsigned int pcm_rates;
  54         const struct samsung_i2s_variant_regs *i2s_variant_regs;
  55 };
  56
  57 struct i2s_dai {
  58         /* Platform device for this DAI */
  59         struct platform_device *pdev;
  60         /* Memory mapped SFR region */
  61         void __iomem    *addr;
  62         /* Rate of RCLK source clock */
  63         unsigned long rclk_srcrate;
  64         /* Frame Clock */
  65         unsigned frmclk;
  66         /*
  67          * Specifically requested RCLK,BCLK by MACHINE Driver.
  68          * 0 indicates CPU driver is free to choose any value.
  69          */
  70         unsigned rfs, bfs;
  71         /* I2S Controller's core clock */
  72         struct clk *clk;
  73         /* Clock for generating I2S signals */
  74         struct clk *op_clk;
  75         /* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */
  76         struct i2s_dai *pri_dai;
  77         /* Pointer to the Secondary_Fifo if it has one, NULL otherwise */
  78         struct i2s_dai *sec_dai;
  79 #define DAI_OPENED      (1 << 0) /* Dai is opened */
  80 #define DAI_MANAGER     (1 << 1) /* Dai is the manager */
  81         unsigned mode;
  82         /* Driver for this DAI */
  83         struct snd_soc_dai_driver i2s_dai_drv;
  84         /* DMA parameters */
  85         struct snd_dmaengine_dai_dma_data dma_playback;
  86         struct snd_dmaengine_dai_dma_data dma_capture;
  87         struct snd_dmaengine_dai_dma_data idma_playback;
  88         dma_filter_fn filter;
  89         u32     quirks;
  90         u32     suspend_i2smod;
  91         u32     suspend_i2scon;
  92         u32     suspend_i2spsr;
  93         const struct samsung_i2s_variant_regs *variant_regs;
  94
  95         /* Spinlock protecting access to the device's registers */
  96         spinlock_t spinlock;
  97         spinlock_t *lock;
  98
  99         /* Below fields are only valid if this is the primary FIFO */
 100         struct clk *clk_table[3];
 101         struct clk_onecell_data clk_data;
 102 };
 103
 104 /* Lock for cross i/f checks */
 105 static DEFINE_SPINLOCK(lock);
 106
 107 /* If this is the 'overlay' stereo DAI */
 108 static inline bool is_secondary(struct i2s_dai *i2s)
 109 {
 110         return i2s->pri_dai ? true : false;
 111 }
 112
 113 /* If operating in SoC-Slave mode */
 114 static inline bool is_slave(struct i2s_dai *i2s)
 115 {
 116         u32 mod = readl(i2s->addr + I2SMOD);
 117         return (mod & (1 << i2s->variant_regs->mss_off)) ? true : false;
 118 }
 119
 120 /* If this interface of the controller is transmitting data */
 121 static inline bool tx_active(struct i2s_dai *i2s)
 122 {
 123         u32 active;
 124
 125         if (!i2s)
 126                 return false;
 127
 128         active = readl(i2s->addr + I2SCON);
 129
 130         if (is_secondary(i2s))
 131                 active &= CON_TXSDMA_ACTIVE;
 132         else
 133                 active &= CON_TXDMA_ACTIVE;
 134
 135         return active ? true : false;
 136 }
 137
 138 /* Return pointer to the other DAI */
 139 static inline struct i2s_dai *get_other_dai(struct i2s_dai *i2s)
 140 {
 141         return i2s->pri_dai ? : i2s->sec_dai;
 142 }
 143
 144 /* If the other interface of the controller is transmitting data */
 145 static inline bool other_tx_active(struct i2s_dai *i2s)
 146 {
 147         struct i2s_dai *other = get_other_dai(i2s);
 148
 149         return tx_active(other);
 150 }
 151
 152 /* If any interface of the controller is transmitting data */
 153 static inline bool any_tx_active(struct i2s_dai *i2s)
 154 {
 155         return tx_active(i2s) || other_tx_active(i2s);
 156 }
 157
 158 /* If this interface of the controller is receiving data */
 159 static inline bool rx_active(struct i2s_dai *i2s)
 160 {
 161         u32 active;
 162
 163         if (!i2s)
 164                 return false;
 165
 166         active = readl(i2s->addr + I2SCON) & CON_RXDMA_ACTIVE;
 167
 168         return active ? true : false;
 169 }
 170
 171 /* If the other interface of the controller is receiving data */
 172 static inline bool other_rx_active(struct i2s_dai *i2s)
 173 {
 174         struct i2s_dai *other = get_other_dai(i2s);
 175
 176         return rx_active(other);
 177 }
 178
 179 /* If any interface of the controller is receiving data */
 180 static inline bool any_rx_active(struct i2s_dai *i2s)
 181 {
 182         return rx_active(i2s) || other_rx_active(i2s);
 183 }
 184
 185 /* If the other DAI is transmitting or receiving data */
 186 static inline bool other_active(struct i2s_dai *i2s)
 187 {
 188         return other_rx_active(i2s) || other_tx_active(i2s);
 189 }
 190
 191 /* If this DAI is transmitting or receiving data */
 192 static inline bool this_active(struct i2s_dai *i2s)
 193 {
 194         return tx_active(i2s) || rx_active(i2s);
 195 }
 196
 197 /* If the controller is active anyway */
 198 static inline bool any_active(struct i2s_dai *i2s)
 199 {
 200         return this_active(i2s) || other_active(i2s);
 201 }
 202
 203 static inline struct i2s_dai *to_info(struct snd_soc_dai *dai)
 204 {
 205         return snd_soc_dai_get_drvdata(dai);
 206 }
 207
 208 static inline bool is_opened(struct i2s_dai *i2s)
 209 {
 210         if (i2s && (i2s->mode & DAI_OPENED))
 211                 return true;
 212         else
 213                 return false;
 214 }
 215
 216 static inline bool is_manager(struct i2s_dai *i2s)
 217 {
 218         if (is_opened(i2s) && (i2s->mode & DAI_MANAGER))
 219                 return true;
 220         else
 221                 return false;
 222 }
 223
 224 /* Read RCLK of I2S (in multiples of LRCLK) */
 225 static inline unsigned get_rfs(struct i2s_dai *i2s)
 226 {
 227         u32 rfs;
 228         rfs = readl(i2s->addr + I2SMOD) >> i2s->variant_regs->rfs_off;
 229         rfs &= i2s->variant_regs->rfs_mask;
 230
 231         switch (rfs) {
 232         case 7: return 192;
 233         case 6: return 96;
 234         case 5: return 128;
 235         case 4: return 64;
 236         case 3: return 768;
 237         case 2: return 384;
 238         case 1: return 512;
 239         default: return 256;
 240         }
 241 }
 242
 243 /* Write RCLK of I2S (in multiples of LRCLK) */
 244 static inline void set_rfs(struct i2s_dai *i2s, unsigned rfs)
 245 {
 246         u32 mod = readl(i2s->addr + I2SMOD);
 247         int rfs_shift = i2s->variant_regs->rfs_off;
 248
 249         mod &= ~(i2s->variant_regs->rfs_mask << rfs_shift);
 250
 251         switch (rfs) {
 252         case 192:
 253                 mod |= (EXYNOS7_MOD_RCLK_192FS << rfs_shift);
 254                 break;
 255         case 96:
 256                 mod |= (EXYNOS7_MOD_RCLK_96FS << rfs_shift);
 257                 break;
 258         case 128:
 259                 mod |= (EXYNOS7_MOD_RCLK_128FS << rfs_shift);
 260                 break;
 261         case 64:
 262                 mod |= (EXYNOS7_MOD_RCLK_64FS << rfs_shift);
 263                 break;
 264         case 768:
 265                 mod |= (MOD_RCLK_768FS << rfs_shift);
 266                 break;
 267         case 512:
 268                 mod |= (MOD_RCLK_512FS << rfs_shift);
 269                 break;
 270         case 384:
 271                 mod |= (MOD_RCLK_384FS << rfs_shift);
 272                 break;
 273         default:
 274                 mod |= (MOD_RCLK_256FS << rfs_shift);
 275                 break;
 276         }
 277
 278         writel(mod, i2s->addr + I2SMOD);
 279 }
 280
 281 /* Read Bit-Clock of I2S (in multiples of LRCLK) */
 282 static inline unsigned get_bfs(struct i2s_dai *i2s)
 283 {
 284         u32 bfs;
 285         bfs = readl(i2s->addr + I2SMOD) >> i2s->variant_regs->bfs_off;
 286         bfs &= i2s->variant_regs->bfs_mask;
 287
 288         switch (bfs) {
 289         case 8: return 256;
 290         case 7: return 192;
 291         case 6: return 128;
 292         case 5: return 96;
 293         case 4: return 64;
 294         case 3: return 24;
 295         case 2: return 16;
 296         case 1: return 48;
 297         default: return 32;
 298         }
 299 }
 300
 301 /* Write Bit-Clock of I2S (in multiples of LRCLK) */
 302 static inline void set_bfs(struct i2s_dai *i2s, unsigned bfs)
 303 {
 304         u32 mod = readl(i2s->addr + I2SMOD);
 305         int tdm = i2s->quirks & QUIRK_SUPPORTS_TDM;
 306         int bfs_shift = i2s->variant_regs->bfs_off;
 307
 308         /* Non-TDM I2S controllers do not support BCLK > 48 * FS */
 309         if (!tdm && bfs > 48) {
 310                 dev_err(&i2s->pdev->dev, "Unsupported BCLK divider\n");
 311                 return;
 312         }
 313
 314         mod &= ~(i2s->variant_regs->bfs_mask << bfs_shift);
 315
 316         switch (bfs) {
 317         case 48:
 318                 mod |= (MOD_BCLK_48FS << bfs_shift);
 319                 break;
 320         case 32:
 321                 mod |= (MOD_BCLK_32FS << bfs_shift);
 322                 break;
 323         case 24:
 324                 mod |= (MOD_BCLK_24FS << bfs_shift);
 325                 break;
 326         case 16:
 327                 mod |= (MOD_BCLK_16FS << bfs_shift);
 328                 break;
 329         case 64:
 330                 mod |= (EXYNOS5420_MOD_BCLK_64FS << bfs_shift);
 331                 break;
 332         case 96:
 333                 mod |= (EXYNOS5420_MOD_BCLK_96FS << bfs_shift);
 334                 break;
 335         case 128:
 336                 mod |= (EXYNOS5420_MOD_BCLK_128FS << bfs_shift);
 337                 break;
 338         case 192:
 339                 mod |= (EXYNOS5420_MOD_BCLK_192FS << bfs_shift);
 340                 break;
 341         case 256:
 342                 mod |= (EXYNOS5420_MOD_BCLK_256FS << bfs_shift);
 343                 break;
 344         default:
 345                 dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n");
 346                 return;
 347         }
 348
 349         writel(mod, i2s->addr + I2SMOD);
 350 }
 351
 352 /* Sample-Size */
 353 static inline int get_blc(struct i2s_dai *i2s)
 354 {
 355         int blc = readl(i2s->addr + I2SMOD);
 356
 357         blc = (blc >> 13) & 0x3;
 358
 359         switch (blc) {
 360         case 2: return 24;
 361         case 1: return 8;
 362         default: return 16;
 363         }
 364 }
 365
 366 /* TX Channel Control */
 367 static void i2s_txctrl(struct i2s_dai *i2s, int on)
 368 {
 369         void __iomem *addr = i2s->addr;
 370         int txr_off = i2s->variant_regs->txr_off;
 371         u32 con = readl(addr + I2SCON);
 372         u32 mod = readl(addr + I2SMOD) & ~(3 << txr_off);
 373
 374         if (on) {
 375                 con |= CON_ACTIVE;
 376                 con &= ~CON_TXCH_PAUSE;
 377
 378                 if (is_secondary(i2s)) {
 379                         con |= CON_TXSDMA_ACTIVE;
 380                         con &= ~CON_TXSDMA_PAUSE;
 381                 } else {
 382                         con |= CON_TXDMA_ACTIVE;
 383                         con &= ~CON_TXDMA_PAUSE;
 384                 }
 385
 386                 if (any_rx_active(i2s))
 387                         mod |= 2 << txr_off;
 388                 else
 389                         mod |= 0 << txr_off;
 390         } else {
 391                 if (is_secondary(i2s)) {
 392                         con |=  CON_TXSDMA_PAUSE;
 393                         con &= ~CON_TXSDMA_ACTIVE;
 394                 } else {
 395                         con |=  CON_TXDMA_PAUSE;
 396                         con &= ~CON_TXDMA_ACTIVE;
 397                 }
 398
 399                 if (other_tx_active(i2s)) {
 400                         writel(con, addr + I2SCON);
 401                         return;
 402                 }
 403
 404                 con |=  CON_TXCH_PAUSE;
 405
 406                 if (any_rx_active(i2s))
 407                         mod |= 1 << txr_off;
 408                 else
 409                         con &= ~CON_ACTIVE;
 410         }
 411
 412         writel(mod, addr + I2SMOD);
 413         writel(con, addr + I2SCON);
 414 }
 415
 416 /* RX Channel Control */
 417 static void i2s_rxctrl(struct i2s_dai *i2s, int on)
 418 {
 419         void __iomem *addr = i2s->addr;
 420         int txr_off = i2s->variant_regs->txr_off;
 421         u32 con = readl(addr + I2SCON);
 422         u32 mod = readl(addr + I2SMOD) & ~(3 << txr_off);
 423
 424         if (on) {
 425                 con |= CON_RXDMA_ACTIVE | CON_ACTIVE;
 426                 con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE);
 427
 428                 if (any_tx_active(i2s))
 429                         mod |= 2 << txr_off;
 430                 else
 431                         mod |= 1 << txr_off;
 432         } else {
 433                 con |=  CON_RXDMA_PAUSE | CON_RXCH_PAUSE;
 434                 con &= ~CON_RXDMA_ACTIVE;
 435
 436                 if (any_tx_active(i2s))
 437                         mod |= 0 << txr_off;
 438                 else
 439                         con &= ~CON_ACTIVE;
 440         }
 441
 442         writel(mod, addr + I2SMOD);
 443         writel(con, addr + I2SCON);
 444 }
 445
 446 /* Flush FIFO of an interface */
 447 static inline void i2s_fifo(struct i2s_dai *i2s, u32 flush)
 448 {
 449         void __iomem *fic;
 450         u32 val;
 451
 452         if (!i2s)
 453                 return;
 454
 455         if (is_secondary(i2s))
 456                 fic = i2s->addr + I2SFICS;
 457         else
 458                 fic = i2s->addr + I2SFIC;
 459
 460         /* Flush the FIFO */
 461         writel(readl(fic) | flush, fic);
 462
 463         /* Be patient */
 464         val = msecs_to_loops(1) / 1000; /* 1 usec */
 465         while (--val)
 466                 cpu_relax();
 467
 468         writel(readl(fic) & ~flush, fic);
 469 }
 470
 471 static int i2s_set_sysclk(struct snd_soc_dai *dai,
 472           int clk_id, unsigned int rfs, int dir)
 473 {
 474         struct i2s_dai *i2s = to_info(dai);
 475         struct i2s_dai *other = get_other_dai(i2s);
 476         const struct samsung_i2s_variant_regs *i2s_regs = i2s->variant_regs;
 477         unsigned int cdcon_mask = 1 << i2s_regs->cdclkcon_off;
 478         unsigned int rsrc_mask = 1 << i2s_regs->rclksrc_off;
 479         u32 mod, mask, val = 0;
 480         unsigned long flags;
 481         int ret = 0;
 482
 483         pm_runtime_get_sync(dai->dev);
 484
 485         spin_lock_irqsave(i2s->lock, flags);
 486         mod = readl(i2s->addr + I2SMOD);
 487         spin_unlock_irqrestore(i2s->lock, flags);
 488
 489         switch (clk_id) {
 490         case SAMSUNG_I2S_OPCLK:
 491                 mask = MOD_OPCLK_MASK;
 492                 val = (dir << MOD_OPCLK_SHIFT) & MOD_OPCLK_MASK;
 493                 break;
 494         case SAMSUNG_I2S_CDCLK:
 495                 mask = 1 << i2s_regs->cdclkcon_off;
 496                 /* Shouldn't matter in GATING(CLOCK_IN) mode */
 497                 if (dir == SND_SOC_CLOCK_IN)
 498                         rfs = 0;
 499
 500                 if ((rfs && other && other->rfs && (other->rfs != rfs)) ||
 501                                 (any_active(i2s) &&
 502                                 (((dir == SND_SOC_CLOCK_IN)
 503                                         && !(mod & cdcon_mask)) ||
 504                                 ((dir == SND_SOC_CLOCK_OUT)
 505                                         && (mod & cdcon_mask))))) {
 506                         dev_err(&i2s->pdev->dev,
 507                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 508                         ret = -EAGAIN;
 509                         goto err;
 510                 }
 511
 512                 if (dir == SND_SOC_CLOCK_IN)
 513                         val = 1 << i2s_regs->cdclkcon_off;
 514
 515                 i2s->rfs = rfs;
 516                 break;
 517
 518         case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */
 519         case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */
 520                 mask = 1 << i2s_regs->rclksrc_off;
 521
 522                 if ((i2s->quirks & QUIRK_NO_MUXPSR)
 523                                 || (clk_id == SAMSUNG_I2S_RCLKSRC_0))
 524                         clk_id = 0;
 525                 else
 526                         clk_id = 1;
 527
 528                 if (!any_active(i2s)) {
 529                         if (i2s->op_clk && !IS_ERR(i2s->op_clk)) {
 530                                 if ((clk_id && !(mod & rsrc_mask)) ||
 531                                         (!clk_id && (mod & rsrc_mask))) {
 532                                         clk_disable_unprepare(i2s->op_clk);
 533                                         clk_put(i2s->op_clk);
 534                                 } else {
 535                                         i2s->rclk_srcrate =
 536                                                 clk_get_rate(i2s->op_clk);
 537                                         goto done;
 538                                 }
 539                         }
 540
 541                         if (clk_id)
 542                                 i2s->op_clk = clk_get(&i2s->pdev->dev,
 543                                                 "i2s_opclk1");
 544                         else
 545                                 i2s->op_clk = clk_get(&i2s->pdev->dev,
 546                                                 "i2s_opclk0");
 547
 548                         if (WARN_ON(IS_ERR(i2s->op_clk))) {
 549                                 ret = PTR_ERR(i2s->op_clk);
 550                                 i2s->op_clk = NULL;
 551                                 goto err;
 552                         }
 553
 554                         ret = clk_prepare_enable(i2s->op_clk);
 555                         if (ret) {
 556                                 clk_put(i2s->op_clk);
 557                                 i2s->op_clk = NULL;
 558                                 goto err;
 559                         }
 560                         i2s->rclk_srcrate = clk_get_rate(i2s->op_clk);
 561
 562                         /* Over-ride the other's */
 563                         if (other) {
 564                                 other->op_clk = i2s->op_clk;
 565                                 other->rclk_srcrate = i2s->rclk_srcrate;
 566                         }
 567                 } else if ((!clk_id && (mod & rsrc_mask))
 568                                 || (clk_id && !(mod & rsrc_mask))) {
 569                         dev_err(&i2s->pdev->dev,
 570                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 571                         ret = -EAGAIN;
 572                         goto err;
 573                 } else {
 574                         /* Call can't be on the active DAI */
 575                         i2s->op_clk = other->op_clk;
 576                         i2s->rclk_srcrate = other->rclk_srcrate;
 577                         goto done;
 578                 }
 579
 580                 if (clk_id == 1)
 581                         val = 1 << i2s_regs->rclksrc_off;
 582                 break;
 583         default:
 584                 dev_err(&i2s->pdev->dev, "We don't serve that!\n");
 585                 ret = -EINVAL;
 586                 goto err;
 587         }
 588
 589         spin_lock_irqsave(i2s->lock, flags);
 590         mod = readl(i2s->addr + I2SMOD);
 591         mod = (mod & ~mask) | val;
 592         writel(mod, i2s->addr + I2SMOD);
 593         spin_unlock_irqrestore(i2s->lock, flags);
 594 done:
 595         pm_runtime_put(dai->dev);
 596
 597         return 0;
 598 err:
 599         pm_runtime_put(dai->dev);
 600         return ret;
 601 }
 602
 603 static int i2s_set_fmt(struct snd_soc_dai *dai,
 604         unsigned int fmt)
 605 {
 606         struct i2s_dai *i2s = to_info(dai);
 607         int lrp_shift, sdf_shift, sdf_mask, lrp_rlow, mod_slave;
 608         u32 mod, tmp = 0;
 609         unsigned long flags;
 610
 611         lrp_shift = i2s->variant_regs->lrp_off;
 612         sdf_shift = i2s->variant_regs->sdf_off;
 613         mod_slave = 1 << i2s->variant_regs->mss_off;
 614
 615         sdf_mask = MOD_SDF_MASK << sdf_shift;
 616         lrp_rlow = MOD_LR_RLOW << lrp_shift;
 617
 618         /* Format is priority */
 619         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 620         case SND_SOC_DAIFMT_RIGHT_J:
 621                 tmp |= lrp_rlow;
 622                 tmp |= (MOD_SDF_MSB << sdf_shift);
 623                 break;
 624         case SND_SOC_DAIFMT_LEFT_J:
 625                 tmp |= lrp_rlow;
 626                 tmp |= (MOD_SDF_LSB << sdf_shift);
 627                 break;
 628         case SND_SOC_DAIFMT_I2S:
 629                 tmp |= (MOD_SDF_IIS << sdf_shift);
 630                 break;
 631         default:
 632                 dev_err(&i2s->pdev->dev, "Format not supported\n");
 633                 return -EINVAL;
 634         }
 635
 636         /*
 637          * INV flag is relative to the FORMAT flag - if set it simply
 638          * flips the polarity specified by the Standard
 639          */
 640         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 641         case SND_SOC_DAIFMT_NB_NF:
 642                 break;
 643         case SND_SOC_DAIFMT_NB_IF:
 644                 if (tmp & lrp_rlow)
 645                         tmp &= ~lrp_rlow;
 646                 else
 647                         tmp |= lrp_rlow;
 648                 break;
 649         default:
 650                 dev_err(&i2s->pdev->dev, "Polarity not supported\n");
 651                 return -EINVAL;
 652         }
 653
 654         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 655         case SND_SOC_DAIFMT_CBM_CFM:
 656                 tmp |= mod_slave;
 657                 break;
 658         case SND_SOC_DAIFMT_CBS_CFS:
 659                 /*
 660                  * Set default source clock in Master mode, only when the
 661                  * CLK_I2S_RCLK_SRC clock is not exposed so we ensure any
 662                  * clock configuration assigned in DT is not overwritten.
 663                  */
 664                 if (i2s->rclk_srcrate == 0 && i2s->clk_data.clks == NULL)
 665                         i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0,
 666                                                         0, SND_SOC_CLOCK_IN);
 667                 break;
 668         default:
 669                 dev_err(&i2s->pdev->dev, "master/slave format not supported\n");
 670                 return -EINVAL;
 671         }
 672
 673         pm_runtime_get_sync(dai->dev);
 674         spin_lock_irqsave(i2s->lock, flags);
 675         mod = readl(i2s->addr + I2SMOD);
 676         /*
 677          * Don't change the I2S mode if any controller is active on this
 678          * channel.
 679          */
 680         if (any_active(i2s) &&
 681                 ((mod & (sdf_mask | lrp_rlow | mod_slave)) != tmp)) {
 682                 spin_unlock_irqrestore(i2s->lock, flags);
 683                 pm_runtime_put(dai->dev);
 684                 dev_err(&i2s->pdev->dev,
 685                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 686                 return -EAGAIN;
 687         }
 688
 689         mod &= ~(sdf_mask | lrp_rlow | mod_slave);
 690         mod |= tmp;
 691         writel(mod, i2s->addr + I2SMOD);
 692         spin_unlock_irqrestore(i2s->lock, flags);
 693         pm_runtime_put(dai->dev);
 694
 695         return 0;
 696 }
 697
 698 static int i2s_hw_params(struct snd_pcm_substream *substream,
 699         struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
 700 {
 701         struct i2s_dai *i2s = to_info(dai);
 702         u32 mod, mask = 0, val = 0;
 703         unsigned long flags;
 704
 705         WARN_ON(!pm_runtime_active(dai->dev));
 706
 707         if (!is_secondary(i2s))
 708                 mask |= (MOD_DC2_EN | MOD_DC1_EN);
 709
 710         switch (params_channels(params)) {
 711         case 6:
 712                 val |= MOD_DC2_EN;
 713                 /* fall through */
 714         case 4:
 715                 val |= MOD_DC1_EN;
 716                 break;
 717         case 2:
 718                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 719                         i2s->dma_playback.addr_width = 4;
 720                 else
 721                         i2s->dma_capture.addr_width = 4;
 722                 break;
 723         case 1:
 724                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 725                         i2s->dma_playback.addr_width = 2;
 726                 else
 727                         i2s->dma_capture.addr_width = 2;
 728
 729                 break;
 730         default:
 731                 dev_err(&i2s->pdev->dev, "%d channels not supported\n",
 732                                 params_channels(params));
 733                 return -EINVAL;
 734         }
 735
 736         if (is_secondary(i2s))
 737                 mask |= MOD_BLCS_MASK;
 738         else
 739                 mask |= MOD_BLCP_MASK;
 740
 741         if (is_manager(i2s))
 742                 mask |= MOD_BLC_MASK;
 743
 744         switch (params_width(params)) {
 745         case 8:
 746                 if (is_secondary(i2s))
 747                         val |= MOD_BLCS_8BIT;
 748                 else
 749                         val |= MOD_BLCP_8BIT;
 750                 if (is_manager(i2s))
 751                         val |= MOD_BLC_8BIT;
 752                 break;
 753         case 16:
 754                 if (is_secondary(i2s))
 755                         val |= MOD_BLCS_16BIT;
 756                 else
 757                         val |= MOD_BLCP_16BIT;
 758                 if (is_manager(i2s))
 759                         val |= MOD_BLC_16BIT;
 760                 break;
 761         case 24:
 762                 if (is_secondary(i2s))
 763                         val |= MOD_BLCS_24BIT;
 764                 else
 765                         val |= MOD_BLCP_24BIT;
 766                 if (is_manager(i2s))
 767                         val |= MOD_BLC_24BIT;
 768                 break;
 769         default:
 770                 dev_err(&i2s->pdev->dev, "Format(%d) not supported\n",
 771                                 params_format(params));
 772                 return -EINVAL;
 773         }
 774
 775         spin_lock_irqsave(i2s->lock, flags);
 776         mod = readl(i2s->addr + I2SMOD);
 777         mod = (mod & ~mask) | val;
 778         writel(mod, i2s->addr + I2SMOD);
 779         spin_unlock_irqrestore(i2s->lock, flags);
 780
 781         snd_soc_dai_init_dma_data(dai, &i2s->dma_playback, &i2s->dma_capture);
 782
 783         i2s->frmclk = params_rate(params);
 784
 785         return 0;
 786 }
 787
 788 /* We set constraints on the substream acc to the version of I2S */
 789 static int i2s_startup(struct snd_pcm_substream *substream,
 790           struct snd_soc_dai *dai)
 791 {
 792         struct i2s_dai *i2s = to_info(dai);
 793         struct i2s_dai *other = get_other_dai(i2s);
 794         unsigned long flags;
 795
 796         pm_runtime_get_sync(dai->dev);
 797
 798         spin_lock_irqsave(&lock, flags);
 799
 800         i2s->mode |= DAI_OPENED;
 801
 802         if (is_manager(other))
 803                 i2s->mode &= ~DAI_MANAGER;
 804         else
 805                 i2s->mode |= DAI_MANAGER;
 806
 807         if (!any_active(i2s) && (i2s->quirks & QUIRK_NEED_RSTCLR))
 808                 writel(CON_RSTCLR, i2s->addr + I2SCON);
 809
 810         spin_unlock_irqrestore(&lock, flags);
 811
 812         return 0;
 813 }
 814
 815 static void i2s_shutdown(struct snd_pcm_substream *substream,
 816         struct snd_soc_dai *dai)
 817 {
 818         struct i2s_dai *i2s = to_info(dai);
 819         struct i2s_dai *other = get_other_dai(i2s);
 820         unsigned long flags;
 821
 822         spin_lock_irqsave(&lock, flags);
 823
 824         i2s->mode &= ~DAI_OPENED;
 825         i2s->mode &= ~DAI_MANAGER;
 826
 827         if (is_opened(other))
 828                 other->mode |= DAI_MANAGER;
 829
 830         /* Reset any constraint on RFS and BFS */
 831         i2s->rfs = 0;
 832         i2s->bfs = 0;
 833
 834         spin_unlock_irqrestore(&lock, flags);
 835
 836         pm_runtime_put(dai->dev);
 837 }
 838
 839 static int config_setup(struct i2s_dai *i2s)
 840 {
 841         struct i2s_dai *other = get_other_dai(i2s);
 842         unsigned rfs, bfs, blc;
 843         u32 psr;
 844
 845         blc = get_blc(i2s);
 846
 847         bfs = i2s->bfs;
 848
 849         if (!bfs && other)
 850                 bfs = other->bfs;
 851
 852         /* Select least possible multiple(2) if no constraint set */
 853         if (!bfs)
 854                 bfs = blc * 2;
 855
 856         rfs = i2s->rfs;
 857
 858         if (!rfs && other)
 859                 rfs = other->rfs;
 860
 861         if ((rfs == 256 || rfs == 512) && (blc == 24)) {
 862                 dev_err(&i2s->pdev->dev,
 863                         "%d-RFS not supported for 24-blc\n", rfs);
 864                 return -EINVAL;
 865         }
 866
 867         if (!rfs) {
 868                 if (bfs == 16 || bfs == 32)
 869                         rfs = 256;
 870                 else
 871                         rfs = 384;
 872         }
 873
 874         /* If already setup and running */
 875         if (any_active(i2s) && (get_rfs(i2s) != rfs || get_bfs(i2s) != bfs)) {
 876                 dev_err(&i2s->pdev->dev,
 877                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 878                 return -EAGAIN;
 879         }
 880
 881         set_bfs(i2s, bfs);
 882         set_rfs(i2s, rfs);
 883
 884         /* Don't bother with PSR in Slave mode */
 885         if (is_slave(i2s))
 886                 return 0;
 887
 888         if (!(i2s->quirks & QUIRK_NO_MUXPSR)) {
 889                 struct clk *rclksrc = i2s->clk_table[CLK_I2S_RCLK_SRC];
 890
 891                 if (rclksrc && !IS_ERR(rclksrc))
 892                         i2s->rclk_srcrate = clk_get_rate(rclksrc);
 893
 894                 psr = i2s->rclk_srcrate / i2s->frmclk / rfs;
 895                 writel(((psr - 1) << 8) | PSR_PSREN, i2s->addr + I2SPSR);
 896                 dev_dbg(&i2s->pdev->dev,
 897                         "RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n",
 898                                 i2s->rclk_srcrate, psr, rfs, bfs);
 899         }
 900
 901         return 0;
 902 }
 903
 904 static int i2s_trigger(struct snd_pcm_substream *substream,
 905         int cmd, struct snd_soc_dai *dai)
 906 {
 907         int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
 908         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 909         struct i2s_dai *i2s = to_info(rtd->cpu_dai);
 910         unsigned long flags;
 911
 912         switch (cmd) {
 913         case SNDRV_PCM_TRIGGER_START:
 914         case SNDRV_PCM_TRIGGER_RESUME:
 915         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 916                 pm_runtime_get_sync(dai->dev);
 917                 spin_lock_irqsave(i2s->lock, flags);
 918
 919                 if (config_setup(i2s)) {
 920                         spin_unlock_irqrestore(i2s->lock, flags);
 921                         return -EINVAL;
 922                 }
 923
 924                 if (capture)
 925                         i2s_rxctrl(i2s, 1);
 926                 else
 927                         i2s_txctrl(i2s, 1);
 928
 929                 spin_unlock_irqrestore(i2s->lock, flags);
 930                 break;
 931         case SNDRV_PCM_TRIGGER_STOP:
 932         case SNDRV_PCM_TRIGGER_SUSPEND:
 933         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 934                 spin_lock_irqsave(i2s->lock, flags);
 935
 936                 if (capture) {
 937                         i2s_rxctrl(i2s, 0);
 938                         i2s_fifo(i2s, FIC_RXFLUSH);
 939                 } else {
 940                         i2s_txctrl(i2s, 0);
 941                         i2s_fifo(i2s, FIC_TXFLUSH);
 942                 }
 943
 944                 spin_unlock_irqrestore(i2s->lock, flags);
 945                 pm_runtime_put(dai->dev);
 946                 break;
 947         }
 948
 949         return 0;
 950 }
 951
 952 static int i2s_set_clkdiv(struct snd_soc_dai *dai,
 953         int div_id, int div)
 954 {
 955         struct i2s_dai *i2s = to_info(dai);
 956         struct i2s_dai *other = get_other_dai(i2s);
 957
 958         switch (div_id) {
 959         case SAMSUNG_I2S_DIV_BCLK:
 960                 pm_runtime_get_sync(dai->dev);
 961                 if ((any_active(i2s) && div && (get_bfs(i2s) != div))
 962                         || (other && other->bfs && (other->bfs != div))) {
 963                         pm_runtime_put(dai->dev);
 964                         dev_err(&i2s->pdev->dev,
 965                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 966                         return -EAGAIN;
 967                 }
 968                 i2s->bfs = div;
 969                 pm_runtime_put(dai->dev);
 970                 break;
 971         default:
 972                 dev_err(&i2s->pdev->dev,
 973                         "Invalid clock divider(%d)\n", div_id);
 974                 return -EINVAL;
 975         }
 976
 977         return 0;
 978 }
 979
 980 static snd_pcm_sframes_t
 981 i2s_delay(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
 982 {
 983         struct i2s_dai *i2s = to_info(dai);
 984         u32 reg = readl(i2s->addr + I2SFIC);
 985         snd_pcm_sframes_t delay;
 986         const struct samsung_i2s_variant_regs *i2s_regs = i2s->variant_regs;
 987
 988         WARN_ON(!pm_runtime_active(dai->dev));
 989
 990         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 991                 delay = FIC_RXCOUNT(reg);
 992         else if (is_secondary(i2s))
 993                 delay = FICS_TXCOUNT(readl(i2s->addr + I2SFICS));
 994         else
 995                 delay = (reg >> i2s_regs->ftx0cnt_off) & 0x7f;
 996
 997         return delay;
 998 }
 999
1000 #ifdef CONFIG_PM
1001 static int i2s_suspend(struct snd_soc_dai *dai)
1002 {
1003         return pm_runtime_force_suspend(dai->dev);
1004 }
1005
1006 static int i2s_resume(struct snd_soc_dai *dai)
1007 {
1008         return pm_runtime_force_resume(dai->dev);
1009 }
1010 #else
1011 #define i2s_suspend NULL
1012 #define i2s_resume  NULL
1013 #endif
1014
1015 static int samsung_i2s_dai_probe(struct snd_soc_dai *dai)
1016 {
1017         struct i2s_dai *i2s = to_info(dai);
1018         struct i2s_dai *other = get_other_dai(i2s);
1019         unsigned long flags;
1020
1021         pm_runtime_get_sync(dai->dev);
1022
1023         if (is_secondary(i2s)) { /* If this is probe on the secondary DAI */
1024                 snd_soc_dai_init_dma_data(dai, &other->sec_dai->dma_playback,
1025                                            NULL);
1026         } else {
1027                 snd_soc_dai_init_dma_data(dai, &i2s->dma_playback,
1028                                            &i2s->dma_capture);
1029
1030                 if (i2s->quirks & QUIRK_NEED_RSTCLR)
1031                         writel(CON_RSTCLR, i2s->addr + I2SCON);
1032
1033                 if (i2s->quirks & QUIRK_SUPPORTS_IDMA)
1034                         idma_reg_addr_init(i2s->addr,
1035                                         i2s->sec_dai->idma_playback.addr);
1036         }
1037
1038         /* Reset any constraint on RFS and BFS */
1039         i2s->rfs = 0;
1040         i2s->bfs = 0;
1041         i2s->rclk_srcrate = 0;
1042
1043         spin_lock_irqsave(i2s->lock, flags);
1044         i2s_txctrl(i2s, 0);
1045         i2s_rxctrl(i2s, 0);
1046         i2s_fifo(i2s, FIC_TXFLUSH);
1047         i2s_fifo(other, FIC_TXFLUSH);
1048         i2s_fifo(i2s, FIC_RXFLUSH);
1049         spin_unlock_irqrestore(i2s->lock, flags);
1050
1051         /* Gate CDCLK by default */
1052         if (!is_opened(other))
1053                 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
1054                                 0, SND_SOC_CLOCK_IN);
1055         pm_runtime_put(dai->dev);
1056
1057         return 0;
1058 }
1059
1060 static int samsung_i2s_dai_remove(struct snd_soc_dai *dai)
1061 {
1062         struct i2s_dai *i2s = snd_soc_dai_get_drvdata(dai);
1063         unsigned long flags;
1064
1065         pm_runtime_get_sync(dai->dev);
1066
1067         if (!is_secondary(i2s)) {
1068                 if (i2s->quirks & QUIRK_NEED_RSTCLR) {
1069                         spin_lock_irqsave(i2s->lock, flags);
1070                         writel(0, i2s->addr + I2SCON);
1071                         spin_unlock_irqrestore(i2s->lock, flags);
1072                 }
1073         }
1074
1075         pm_runtime_put(dai->dev);
1076
1077         return 0;
1078 }
1079
1080 static const struct snd_soc_dai_ops samsung_i2s_dai_ops = {
1081         .trigger = i2s_trigger,
1082         .hw_params = i2s_hw_params,
1083         .set_fmt = i2s_set_fmt,
1084         .set_clkdiv = i2s_set_clkdiv,
1085         .set_sysclk = i2s_set_sysclk,
1086         .startup = i2s_startup,
1087         .shutdown = i2s_shutdown,
1088         .delay = i2s_delay,
1089 };
1090
1091 static const struct snd_soc_component_driver samsung_i2s_component = {
1092         .name           = "samsung-i2s",
1093 };
1094
1095 #define SAMSUNG_I2S_FMTS        (SNDRV_PCM_FMTBIT_S8 | \
1096                                         SNDRV_PCM_FMTBIT_S16_LE | \
1097                                         SNDRV_PCM_FMTBIT_S24_LE)
1098
1099 static struct i2s_dai *i2s_alloc_dai(struct platform_device *pdev,
1100                                 const struct samsung_i2s_dai_data *i2s_dai_data,
1101                                 bool sec)
1102 {
1103         struct i2s_dai *i2s;
1104
1105         i2s = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dai), GFP_KERNEL);
1106         if (i2s == NULL)
1107                 return NULL;
1108
1109         i2s->pdev = pdev;
1110         i2s->pri_dai = NULL;
1111         i2s->sec_dai = NULL;
1112         i2s->i2s_dai_drv.id = 1;
1113         i2s->i2s_dai_drv.symmetric_rates = 1;
1114         i2s->i2s_dai_drv.probe = samsung_i2s_dai_probe;
1115         i2s->i2s_dai_drv.remove = samsung_i2s_dai_remove;
1116         i2s->i2s_dai_drv.ops = &samsung_i2s_dai_ops;
1117         i2s->i2s_dai_drv.suspend = i2s_suspend;
1118         i2s->i2s_dai_drv.resume = i2s_resume;
1119         i2s->i2s_dai_drv.playback.channels_min = 1;
1120         i2s->i2s_dai_drv.playback.channels_max = 2;
1121         i2s->i2s_dai_drv.playback.rates = i2s_dai_data->pcm_rates;
1122         i2s->i2s_dai_drv.playback.formats = SAMSUNG_I2S_FMTS;
1123
1124         if (!sec) {
1125                 i2s->i2s_dai_drv.name = SAMSUNG_I2S_DAI;
1126                 i2s->i2s_dai_drv.capture.channels_min = 1;
1127                 i2s->i2s_dai_drv.capture.channels_max = 2;
1128                 i2s->i2s_dai_drv.capture.rates = i2s_dai_data->pcm_rates;
1129                 i2s->i2s_dai_drv.capture.formats = SAMSUNG_I2S_FMTS;
1130         } else {
1131                 i2s->i2s_dai_drv.name = SAMSUNG_I2S_DAI_SEC;
1132         }
1133         return i2s;
1134 }
1135
1136 #ifdef CONFIG_PM
1137 static int i2s_runtime_suspend(struct device *dev)
1138 {
1139         struct i2s_dai *i2s = dev_get_drvdata(dev);
1140
1141         i2s->suspend_i2smod = readl(i2s->addr + I2SMOD);
1142         i2s->suspend_i2scon = readl(i2s->addr + I2SCON);
1143         i2s->suspend_i2spsr = readl(i2s->addr + I2SPSR);
1144
1145         if (i2s->op_clk)
1146                 clk_disable_unprepare(i2s->op_clk);
1147         clk_disable_unprepare(i2s->clk);
1148
1149         return 0;
1150 }
1151
1152 static int i2s_runtime_resume(struct device *dev)
1153 {
1154         struct i2s_dai *i2s = dev_get_drvdata(dev);
1155         int ret;
1156
1157         ret = clk_prepare_enable(i2s->clk);
1158         if (ret)
1159                 return ret;
1160
1161         if (i2s->op_clk) {
1162                 ret = clk_prepare_enable(i2s->op_clk);
1163                 if (ret) {
1164                         clk_disable_unprepare(i2s->clk);
1165                         return ret;
1166                 }
1167         }
1168
1169         writel(i2s->suspend_i2scon, i2s->addr + I2SCON);
1170         writel(i2s->suspend_i2smod, i2s->addr + I2SMOD);
1171         writel(i2s->suspend_i2spsr, i2s->addr + I2SPSR);
1172
1173         return 0;
1174 }
1175 #endif /* CONFIG_PM */
1176
1177 static void i2s_unregister_clocks(struct i2s_dai *i2s)
1178 {
1179         int i;
1180
1181         for (i = 0; i < i2s->clk_data.clk_num; i++) {
1182                 if (!IS_ERR(i2s->clk_table[i]))
1183                         clk_unregister(i2s->clk_table[i]);
1184         }
1185 }
1186
1187 static void i2s_unregister_clock_provider(struct platform_device *pdev)
1188 {
1189         struct i2s_dai *i2s = dev_get_drvdata(&pdev->dev);
1190
1191         of_clk_del_provider(pdev->dev.of_node);
1192         i2s_unregister_clocks(i2s);
1193 }
1194
1195 static int i2s_register_clock_provider(struct platform_device *pdev)
1196 {
1197         const char * const i2s_clk_desc[] = { "cdclk", "rclk_src", "prescaler" };
1198         const char *clk_name[2] = { "i2s_opclk0", "i2s_opclk1" };
1199         const char *p_names[2] = { NULL };
1200         struct device *dev = &pdev->dev;
1201         struct i2s_dai *i2s = dev_get_drvdata(dev);
1202         const struct samsung_i2s_variant_regs *reg_info = i2s->variant_regs;
1203         const char *i2s_clk_name[ARRAY_SIZE(i2s_clk_desc)];
1204         struct clk *rclksrc;
1205         int ret, i;
1206
1207         /* Register the clock provider only if it's expected in the DTB */
1208         if (!of_find_property(dev->of_node, "#clock-cells", NULL))
1209                 return 0;
1210
1211         /* Get the RCLKSRC mux clock parent clock names */
1212         for (i = 0; i < ARRAY_SIZE(p_names); i++) {
1213                 rclksrc = clk_get(dev, clk_name[i]);
1214                 if (IS_ERR(rclksrc))
1215                         continue;
1216                 p_names[i] = __clk_get_name(rclksrc);
1217                 clk_put(rclksrc);
1218         }
1219
1220         for (i = 0; i < ARRAY_SIZE(i2s_clk_desc); i++) {
1221                 i2s_clk_name[i] = devm_kasprintf(dev, GFP_KERNEL, "%s_%s",
1222                                                 dev_name(dev), i2s_clk_desc[i]);
1223                 if (!i2s_clk_name[i])
1224                         return -ENOMEM;
1225         }
1226
1227         if (!(i2s->quirks & QUIRK_NO_MUXPSR)) {
1228                 /* Activate the prescaler */
1229                 u32 val = readl(i2s->addr + I2SPSR);
1230                 writel(val | PSR_PSREN, i2s->addr + I2SPSR);
1231
1232                 i2s->clk_table[CLK_I2S_RCLK_SRC] = clk_register_mux(dev,
1233                                 i2s_clk_name[CLK_I2S_RCLK_SRC], p_names,
1234                                 ARRAY_SIZE(p_names),
1235                                 CLK_SET_RATE_NO_REPARENT | CLK_SET_RATE_PARENT,
1236                                 i2s->addr + I2SMOD, reg_info->rclksrc_off,
1237                                 1, 0, i2s->lock);
1238
1239                 i2s->clk_table[CLK_I2S_RCLK_PSR] = clk_register_divider(dev,
1240                                 i2s_clk_name[CLK_I2S_RCLK_PSR],
1241                                 i2s_clk_name[CLK_I2S_RCLK_SRC],
1242                                 CLK_SET_RATE_PARENT,
1243                                 i2s->addr + I2SPSR, 8, 6, 0, i2s->lock);
1244
1245                 p_names[0] = i2s_clk_name[CLK_I2S_RCLK_PSR];
1246                 i2s->clk_data.clk_num = 2;
1247         }
1248
1249         i2s->clk_table[CLK_I2S_CDCLK] = clk_register_gate(dev,
1250                                 i2s_clk_name[CLK_I2S_CDCLK], p_names[0],
1251                                 CLK_SET_RATE_PARENT,
1252                                 i2s->addr + I2SMOD, reg_info->cdclkcon_off,
1253                                 CLK_GATE_SET_TO_DISABLE, i2s->lock);
1254
1255         i2s->clk_data.clk_num += 1;
1256         i2s->clk_data.clks = i2s->clk_table;
1257
1258         ret = of_clk_add_provider(dev->of_node, of_clk_src_onecell_get,
1259                                   &i2s->clk_data);
1260         if (ret < 0) {
1261                 dev_err(dev, "failed to add clock provider: %d\n", ret);
1262                 i2s_unregister_clocks(i2s);
1263         }
1264
1265         return ret;
1266 }
1267
1268 static int samsung_i2s_probe(struct platform_device *pdev)
1269 {
1270         struct i2s_dai *pri_dai, *sec_dai = NULL;
1271         struct s3c_audio_pdata *i2s_pdata = pdev->dev.platform_data;
1272         struct resource *res;
1273         u32 regs_base, quirks = 0, idma_addr = 0;
1274         struct device_node *np = pdev->dev.of_node;
1275         const struct samsung_i2s_dai_data *i2s_dai_data;
1276         int ret;
1277
1278         if (IS_ENABLED(CONFIG_OF) && pdev->dev.of_node)
1279                 i2s_dai_data = of_device_get_match_data(&pdev->dev);
1280         else
1281                 i2s_dai_data = (struct samsung_i2s_dai_data *)
1282                                 platform_get_device_id(pdev)->driver_data;
1283
1284         pri_dai = i2s_alloc_dai(pdev, i2s_dai_data, false);
1285         if (!pri_dai) {
1286                 dev_err(&pdev->dev, "Unable to alloc I2S_pri\n");
1287                 return -ENOMEM;
1288         }
1289
1290         spin_lock_init(&pri_dai->spinlock);
1291         pri_dai->lock = &pri_dai->spinlock;
1292
1293         if (!np) {
1294                 if (i2s_pdata == NULL) {
1295                         dev_err(&pdev->dev, "Can't work without s3c_audio_pdata\n");
1296                         return -EINVAL;
1297                 }
1298
1299                 pri_dai->dma_playback.filter_data = i2s_pdata->dma_playback;
1300                 pri_dai->dma_capture.filter_data = i2s_pdata->dma_capture;
1301                 pri_dai->filter = i2s_pdata->dma_filter;
1302
1303                 quirks = i2s_pdata->type.quirks;
1304                 idma_addr = i2s_pdata->type.idma_addr;
1305         } else {
1306                 quirks = i2s_dai_data->quirks;
1307                 if (of_property_read_u32(np, "samsung,idma-addr",
1308                                          &idma_addr)) {
1309                         if (quirks & QUIRK_SUPPORTS_IDMA) {
1310                                 dev_info(&pdev->dev, "idma address is not"\
1311                                                 "specified");
1312                         }
1313                 }
1314         }
1315         quirks &= ~(QUIRK_SEC_DAI | QUIRK_SUPPORTS_IDMA);
1316
1317         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1318         pri_dai->addr = devm_ioremap_resource(&pdev->dev, res);
1319         if (IS_ERR(pri_dai->addr))
1320                 return PTR_ERR(pri_dai->addr);
1321
1322         regs_base = res->start;
1323
1324         pri_dai->clk = devm_clk_get(&pdev->dev, "iis");
1325         if (IS_ERR(pri_dai->clk)) {
1326                 dev_err(&pdev->dev, "Failed to get iis clock\n");
1327                 return PTR_ERR(pri_dai->clk);
1328         }
1329
1330         ret = clk_prepare_enable(pri_dai->clk);
1331         if (ret != 0) {
1332                 dev_err(&pdev->dev, "failed to enable clock: %d\n", ret);
1333                 return ret;
1334         }
1335         pri_dai->dma_playback.addr = regs_base + I2STXD;
1336         pri_dai->dma_capture.addr = regs_base + I2SRXD;
1337         pri_dai->dma_playback.chan_name = "tx";
1338         pri_dai->dma_capture.chan_name = "rx";
1339         pri_dai->dma_playback.addr_width = 4;
1340         pri_dai->dma_capture.addr_width = 4;
1341         pri_dai->quirks = quirks;
1342         pri_dai->variant_regs = i2s_dai_data->i2s_variant_regs;
1343
1344         if (quirks & QUIRK_PRI_6CHAN)
1345                 pri_dai->i2s_dai_drv.playback.channels_max = 6;
1346
1347         ret = samsung_asoc_dma_platform_register(&pdev->dev, pri_dai->filter,
1348                                                  NULL, NULL);
1349         if (ret < 0)
1350                 goto err_disable_clk;
1351
1352         ret = devm_snd_soc_register_component(&pdev->dev,
1353                                         &samsung_i2s_component,
1354                                         &pri_dai->i2s_dai_drv, 1);
1355         if (ret < 0)
1356                 goto err_disable_clk;
1357
1358         if (quirks & QUIRK_SEC_DAI) {
1359                 sec_dai = i2s_alloc_dai(pdev, i2s_dai_data, true);
1360                 if (!sec_dai) {
1361                         dev_err(&pdev->dev, "Unable to alloc I2S_sec\n");
1362                         ret = -ENOMEM;
1363                         goto err_disable_clk;
1364                 }
1365
1366                 sec_dai->lock = &pri_dai->spinlock;
1367                 sec_dai->variant_regs = pri_dai->variant_regs;
1368                 sec_dai->dma_playback.addr = regs_base + I2STXDS;
1369                 sec_dai->dma_playback.chan_name = "tx-sec";
1370
1371                 if (!np) {
1372                         sec_dai->dma_playback.filter_data = i2s_pdata->dma_play_sec;
1373                         sec_dai->filter = i2s_pdata->dma_filter;
1374                 }
1375
1376                 sec_dai->dma_playback.addr_width = 4;
1377                 sec_dai->addr = pri_dai->addr;
1378                 sec_dai->clk = pri_dai->clk;
1379                 sec_dai->quirks = quirks;
1380                 sec_dai->idma_playback.addr = idma_addr;
1381                 sec_dai->pri_dai = pri_dai;
1382                 pri_dai->sec_dai = sec_dai;
1383
1384                 ret = samsung_asoc_dma_platform_register(&pdev->dev,
1385                                         sec_dai->filter, "tx-sec", NULL);
1386                 if (ret < 0)
1387                         goto err_disable_clk;
1388
1389                 ret = devm_snd_soc_register_component(&pdev->dev,
1390                                                 &samsung_i2s_component,
1391                                                 &sec_dai->i2s_dai_drv, 1);
1392                 if (ret < 0)
1393                         goto err_disable_clk;
1394         }
1395
1396         if (i2s_pdata && i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
1397                 dev_err(&pdev->dev, "Unable to configure gpio\n");
1398                 ret = -EINVAL;
1399                 goto err_disable_clk;
1400         }
1401
1402         dev_set_drvdata(&pdev->dev, pri_dai);
1403
1404         pm_runtime_set_active(&pdev->dev);
1405         pm_runtime_enable(&pdev->dev);
1406
1407         ret = i2s_register_clock_provider(pdev);
1408         if (ret < 0)
1409                 goto err_disable_pm;
1410
1411         pri_dai->op_clk = clk_get_parent(pri_dai->clk_table[CLK_I2S_RCLK_SRC]);
1412
1413         return 0;
1414
1415 err_disable_pm:
1416         pm_runtime_disable(&pdev->dev);
1417 err_disable_clk:
1418         clk_disable_unprepare(pri_dai->clk);
1419         return ret;
1420 }
1421
1422 static int samsung_i2s_remove(struct platform_device *pdev)
1423 {
1424         struct i2s_dai *pri_dai;
1425
1426         pri_dai = dev_get_drvdata(&pdev->dev);
1427
1428         pm_runtime_get_sync(&pdev->dev);
1429         pm_runtime_disable(&pdev->dev);
1430
1431         i2s_unregister_clock_provider(pdev);
1432         clk_disable_unprepare(pri_dai->clk);
1433         pm_runtime_put_noidle(&pdev->dev);
1434
1435         return 0;
1436 }
1437
1438 static const struct samsung_i2s_variant_regs i2sv3_regs = {
1439         .bfs_off = 1,
1440         .rfs_off = 3,
1441         .sdf_off = 5,
1442         .txr_off = 8,
1443         .rclksrc_off = 10,
1444         .mss_off = 11,
1445         .cdclkcon_off = 12,
1446         .lrp_off = 7,
1447         .bfs_mask = 0x3,
1448         .rfs_mask = 0x3,
1449         .ftx0cnt_off = 8,
1450 };
1451
1452 static const struct samsung_i2s_variant_regs i2sv6_regs = {
1453         .bfs_off = 0,
1454         .rfs_off = 4,
1455         .sdf_off = 6,
1456         .txr_off = 8,
1457         .rclksrc_off = 10,
1458         .mss_off = 11,
1459         .cdclkcon_off = 12,
1460         .lrp_off = 15,
1461         .bfs_mask = 0xf,
1462         .rfs_mask = 0x3,
1463         .ftx0cnt_off = 8,
1464 };
1465
1466 static const struct samsung_i2s_variant_regs i2sv7_regs = {
1467         .bfs_off = 0,
1468         .rfs_off = 4,
1469         .sdf_off = 7,
1470         .txr_off = 9,
1471         .rclksrc_off = 11,
1472         .mss_off = 12,
1473         .cdclkcon_off = 22,
1474         .lrp_off = 15,
1475         .bfs_mask = 0xf,
1476         .rfs_mask = 0x7,
1477         .ftx0cnt_off = 0,
1478 };
1479
1480 static const struct samsung_i2s_variant_regs i2sv5_i2s1_regs = {
1481         .bfs_off = 0,
1482         .rfs_off = 3,
1483         .sdf_off = 6,
1484         .txr_off = 8,
1485         .rclksrc_off = 10,
1486         .mss_off = 11,
1487         .cdclkcon_off = 12,
1488         .lrp_off = 15,
1489         .bfs_mask = 0x7,
1490         .rfs_mask = 0x7,
1491         .ftx0cnt_off = 8,
1492 };
1493
1494 static const struct samsung_i2s_dai_data i2sv3_dai_type = {
1495         .quirks = QUIRK_NO_MUXPSR,
1496         .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1497         .i2s_variant_regs = &i2sv3_regs,
1498 };
1499
1500 static const struct samsung_i2s_dai_data i2sv5_dai_type = {
1501         .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1502                         QUIRK_SUPPORTS_IDMA,
1503         .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1504         .i2s_variant_regs = &i2sv3_regs,
1505 };
1506
1507 static const struct samsung_i2s_dai_data i2sv6_dai_type = {
1508         .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1509                         QUIRK_SUPPORTS_TDM | QUIRK_SUPPORTS_IDMA,
1510         .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1511         .i2s_variant_regs = &i2sv6_regs,
1512 };
1513
1514 static const struct samsung_i2s_dai_data i2sv7_dai_type = {
1515         .quirks = QUIRK_PRI_6CHAN | QUIRK_SEC_DAI | QUIRK_NEED_RSTCLR |
1516                         QUIRK_SUPPORTS_TDM,
1517         .pcm_rates = SNDRV_PCM_RATE_8000_192000,
1518         .i2s_variant_regs = &i2sv7_regs,
1519 };
1520
1521 static const struct samsung_i2s_dai_data i2sv5_dai_type_i2s1 = {
1522         .quirks = QUIRK_PRI_6CHAN | QUIRK_NEED_RSTCLR,
1523         .pcm_rates = SNDRV_PCM_RATE_8000_96000,
1524         .i2s_variant_regs = &i2sv5_i2s1_regs,
1525 };
1526
1527 static const struct platform_device_id samsung_i2s_driver_ids[] = {
1528         {
1529                 .name           = "samsung-i2s",
1530                 .driver_data    = (kernel_ulong_t)&i2sv3_dai_type,
1531         },
1532         {},
1533 };
1534 MODULE_DEVICE_TABLE(platform, samsung_i2s_driver_ids);
1535
1536 #ifdef CONFIG_OF
1537 static const struct of_device_id exynos_i2s_match[] = {
1538         {
1539                 .compatible = "samsung,s3c6410-i2s",
1540                 .data = &i2sv3_dai_type,
1541         }, {
1542                 .compatible = "samsung,s5pv210-i2s",
1543                 .data = &i2sv5_dai_type,
1544         }, {
1545                 .compatible = "samsung,exynos5420-i2s",
1546                 .data = &i2sv6_dai_type,
1547         }, {
1548                 .compatible = "samsung,exynos7-i2s",
1549                 .data = &i2sv7_dai_type,
1550         }, {
1551                 .compatible = "samsung,exynos7-i2s1",
1552                 .data = &i2sv5_dai_type_i2s1,
1553         },
1554         {},
1555 };
1556 MODULE_DEVICE_TABLE(of, exynos_i2s_match);
1557 #endif
1558
1559 static const struct dev_pm_ops samsung_i2s_pm = {
1560         SET_RUNTIME_PM_OPS(i2s_runtime_suspend,
1561                                 i2s_runtime_resume, NULL)
1562         SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
1563                                      pm_runtime_force_resume)
1564 };
1565
1566 static struct platform_driver samsung_i2s_driver = {
1567         .probe  = samsung_i2s_probe,
1568         .remove = samsung_i2s_remove,
1569         .id_table = samsung_i2s_driver_ids,
1570         .driver = {
1571                 .name = "samsung-i2s",
1572                 .of_match_table = of_match_ptr(exynos_i2s_match),
1573                 .pm = &samsung_i2s_pm,
1574         },
1575 };
1576
1577 module_platform_driver(samsung_i2s_driver);
1578
1579 /* Module information */
1580 MODULE_AUTHOR("Jaswinder Singh, <jassisinghbrar@gmail.com>");
1581 MODULE_DESCRIPTION("Samsung I2S Interface");
1582 MODULE_ALIAS("platform:samsung-i2s");
1583 MODULE_LICENSE("GPL");