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