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 <jassi.brar@samsung.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 <plat/audio.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 struct i2s_dai {
  33         /* Platform device for this DAI */
  34         struct platform_device *pdev;
  35         /* IOREMAP'd SFRs */
  36         void __iomem    *addr;
  37         /* Physical base address of SFRs */
  38         u32     base;
  39         /* Rate of RCLK source clock */
  40         unsigned long rclk_srcrate;
  41         /* Frame Clock */
  42         unsigned frmclk;
  43         /*
  44          * Specifically requested RCLK,BCLK by MACHINE Driver.
  45          * 0 indicates CPU driver is free to choose any value.
  46          */
  47         unsigned rfs, bfs;
  48         /* I2S Controller's core clock */
  49         struct clk *clk;
  50         /* Clock for generating I2S signals */
  51         struct clk *op_clk;
  52         /* Array of clock names for op_clk */
  53         const char **src_clk;
  54         /* Pointer to the Primary_Fifo if this is Sec_Fifo, NULL otherwise */
  55         struct i2s_dai *pri_dai;
  56         /* Pointer to the Secondary_Fifo if it has one, NULL otherwise */
  57         struct i2s_dai *sec_dai;
  58 #define DAI_OPENED      (1 << 0) /* Dai is opened */
  59 #define DAI_MANAGER     (1 << 1) /* Dai is the manager */
  60         unsigned mode;
  61         /* Driver for this DAI */
  62         struct snd_soc_dai_driver i2s_dai_drv;
  63         /* DMA parameters */
  64         struct s3c_dma_params dma_playback;
  65         struct s3c_dma_params dma_capture;
  66         struct s3c_dma_params idma_playback;
  67         u32     quirks;
  68         u32     suspend_i2smod;
  69         u32     suspend_i2scon;
  70         u32     suspend_i2spsr;
  71 };
  72
  73 /* Lock for cross i/f checks */
  74 static DEFINE_SPINLOCK(lock);
  75
  76 /* If this is the 'overlay' stereo DAI */
  77 static inline bool is_secondary(struct i2s_dai *i2s)
  78 {
  79         return i2s->pri_dai ? true : false;
  80 }
  81
  82 /* If operating in SoC-Slave mode */
  83 static inline bool is_slave(struct i2s_dai *i2s)
  84 {
  85         return (readl(i2s->addr + I2SMOD) & MOD_SLAVE) ? true : false;
  86 }
  87
  88 /* If this interface of the controller is transmitting data */
  89 static inline bool tx_active(struct i2s_dai *i2s)
  90 {
  91         u32 active;
  92
  93         if (!i2s)
  94                 return false;
  95
  96         active = readl(i2s->addr + I2SCON);
  97
  98         if (is_secondary(i2s))
  99                 active &= CON_TXSDMA_ACTIVE;
 100         else
 101                 active &= CON_TXDMA_ACTIVE;
 102
 103         return active ? true : false;
 104 }
 105
 106 /* If the other interface of the controller is transmitting data */
 107 static inline bool other_tx_active(struct i2s_dai *i2s)
 108 {
 109         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 110
 111         return tx_active(other);
 112 }
 113
 114 /* If any interface of the controller is transmitting data */
 115 static inline bool any_tx_active(struct i2s_dai *i2s)
 116 {
 117         return tx_active(i2s) || other_tx_active(i2s);
 118 }
 119
 120 /* If this interface of the controller is receiving data */
 121 static inline bool rx_active(struct i2s_dai *i2s)
 122 {
 123         u32 active;
 124
 125         if (!i2s)
 126                 return false;
 127
 128         active = readl(i2s->addr + I2SCON) & CON_RXDMA_ACTIVE;
 129
 130         return active ? true : false;
 131 }
 132
 133 /* If the other interface of the controller is receiving data */
 134 static inline bool other_rx_active(struct i2s_dai *i2s)
 135 {
 136         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 137
 138         return rx_active(other);
 139 }
 140
 141 /* If any interface of the controller is receiving data */
 142 static inline bool any_rx_active(struct i2s_dai *i2s)
 143 {
 144         return rx_active(i2s) || other_rx_active(i2s);
 145 }
 146
 147 /* If the other DAI is transmitting or receiving data */
 148 static inline bool other_active(struct i2s_dai *i2s)
 149 {
 150         return other_rx_active(i2s) || other_tx_active(i2s);
 151 }
 152
 153 /* If this DAI is transmitting or receiving data */
 154 static inline bool this_active(struct i2s_dai *i2s)
 155 {
 156         return tx_active(i2s) || rx_active(i2s);
 157 }
 158
 159 /* If the controller is active anyway */
 160 static inline bool any_active(struct i2s_dai *i2s)
 161 {
 162         return this_active(i2s) || other_active(i2s);
 163 }
 164
 165 static inline struct i2s_dai *to_info(struct snd_soc_dai *dai)
 166 {
 167         return snd_soc_dai_get_drvdata(dai);
 168 }
 169
 170 static inline bool is_opened(struct i2s_dai *i2s)
 171 {
 172         if (i2s && (i2s->mode & DAI_OPENED))
 173                 return true;
 174         else
 175                 return false;
 176 }
 177
 178 static inline bool is_manager(struct i2s_dai *i2s)
 179 {
 180         if (is_opened(i2s) && (i2s->mode & DAI_MANAGER))
 181                 return true;
 182         else
 183                 return false;
 184 }
 185
 186 /* Read RCLK of I2S (in multiples of LRCLK) */
 187 static inline unsigned get_rfs(struct i2s_dai *i2s)
 188 {
 189         u32 rfs = (readl(i2s->addr + I2SMOD) >> 3) & 0x3;
 190
 191         switch (rfs) {
 192         case 3: return 768;
 193         case 2: return 384;
 194         case 1: return 512;
 195         default: return 256;
 196         }
 197 }
 198
 199 /* Write RCLK of I2S (in multiples of LRCLK) */
 200 static inline void set_rfs(struct i2s_dai *i2s, unsigned rfs)
 201 {
 202         u32 mod = readl(i2s->addr + I2SMOD);
 203
 204         mod &= ~MOD_RCLK_MASK;
 205
 206         switch (rfs) {
 207         case 768:
 208                 mod |= MOD_RCLK_768FS;
 209                 break;
 210         case 512:
 211                 mod |= MOD_RCLK_512FS;
 212                 break;
 213         case 384:
 214                 mod |= MOD_RCLK_384FS;
 215                 break;
 216         default:
 217                 mod |= MOD_RCLK_256FS;
 218                 break;
 219         }
 220
 221         writel(mod, i2s->addr + I2SMOD);
 222 }
 223
 224 /* Read Bit-Clock of I2S (in multiples of LRCLK) */
 225 static inline unsigned get_bfs(struct i2s_dai *i2s)
 226 {
 227         u32 bfs = (readl(i2s->addr + I2SMOD) >> 1) & 0x3;
 228
 229         switch (bfs) {
 230         case 3: return 24;
 231         case 2: return 16;
 232         case 1: return 48;
 233         default: return 32;
 234         }
 235 }
 236
 237 /* Write Bit-Clock of I2S (in multiples of LRCLK) */
 238 static inline void set_bfs(struct i2s_dai *i2s, unsigned bfs)
 239 {
 240         u32 mod = readl(i2s->addr + I2SMOD);
 241
 242         mod &= ~MOD_BCLK_MASK;
 243
 244         switch (bfs) {
 245         case 48:
 246                 mod |= MOD_BCLK_48FS;
 247                 break;
 248         case 32:
 249                 mod |= MOD_BCLK_32FS;
 250                 break;
 251         case 24:
 252                 mod |= MOD_BCLK_24FS;
 253                 break;
 254         case 16:
 255                 mod |= MOD_BCLK_16FS;
 256                 break;
 257         default:
 258                 dev_err(&i2s->pdev->dev, "Wrong BCLK Divider!\n");
 259                 return;
 260         }
 261
 262         writel(mod, i2s->addr + I2SMOD);
 263 }
 264
 265 /* Sample-Size */
 266 static inline int get_blc(struct i2s_dai *i2s)
 267 {
 268         int blc = readl(i2s->addr + I2SMOD);
 269
 270         blc = (blc >> 13) & 0x3;
 271
 272         switch (blc) {
 273         case 2: return 24;
 274         case 1: return 8;
 275         default: return 16;
 276         }
 277 }
 278
 279 /* TX Channel Control */
 280 static void i2s_txctrl(struct i2s_dai *i2s, int on)
 281 {
 282         void __iomem *addr = i2s->addr;
 283         u32 con = readl(addr + I2SCON);
 284         u32 mod = readl(addr + I2SMOD) & ~MOD_MASK;
 285
 286         if (on) {
 287                 con |= CON_ACTIVE;
 288                 con &= ~CON_TXCH_PAUSE;
 289
 290                 if (is_secondary(i2s)) {
 291                         con |= CON_TXSDMA_ACTIVE;
 292                         con &= ~CON_TXSDMA_PAUSE;
 293                 } else {
 294                         con |= CON_TXDMA_ACTIVE;
 295                         con &= ~CON_TXDMA_PAUSE;
 296                 }
 297
 298                 if (any_rx_active(i2s))
 299                         mod |= MOD_TXRX;
 300                 else
 301                         mod |= MOD_TXONLY;
 302         } else {
 303                 if (is_secondary(i2s)) {
 304                         con |=  CON_TXSDMA_PAUSE;
 305                         con &= ~CON_TXSDMA_ACTIVE;
 306                 } else {
 307                         con |=  CON_TXDMA_PAUSE;
 308                         con &= ~CON_TXDMA_ACTIVE;
 309                 }
 310
 311                 if (other_tx_active(i2s)) {
 312                         writel(con, addr + I2SCON);
 313                         return;
 314                 }
 315
 316                 con |=  CON_TXCH_PAUSE;
 317
 318                 if (any_rx_active(i2s))
 319                         mod |= MOD_RXONLY;
 320                 else
 321                         con &= ~CON_ACTIVE;
 322         }
 323
 324         writel(mod, addr + I2SMOD);
 325         writel(con, addr + I2SCON);
 326 }
 327
 328 /* RX Channel Control */
 329 static void i2s_rxctrl(struct i2s_dai *i2s, int on)
 330 {
 331         void __iomem *addr = i2s->addr;
 332         u32 con = readl(addr + I2SCON);
 333         u32 mod = readl(addr + I2SMOD) & ~MOD_MASK;
 334
 335         if (on) {
 336                 con |= CON_RXDMA_ACTIVE | CON_ACTIVE;
 337                 con &= ~(CON_RXDMA_PAUSE | CON_RXCH_PAUSE);
 338
 339                 if (any_tx_active(i2s))
 340                         mod |= MOD_TXRX;
 341                 else
 342                         mod |= MOD_RXONLY;
 343         } else {
 344                 con |=  CON_RXDMA_PAUSE | CON_RXCH_PAUSE;
 345                 con &= ~CON_RXDMA_ACTIVE;
 346
 347                 if (any_tx_active(i2s))
 348                         mod |= MOD_TXONLY;
 349                 else
 350                         con &= ~CON_ACTIVE;
 351         }
 352
 353         writel(mod, addr + I2SMOD);
 354         writel(con, addr + I2SCON);
 355 }
 356
 357 /* Flush FIFO of an interface */
 358 static inline void i2s_fifo(struct i2s_dai *i2s, u32 flush)
 359 {
 360         void __iomem *fic;
 361         u32 val;
 362
 363         if (!i2s)
 364                 return;
 365
 366         if (is_secondary(i2s))
 367                 fic = i2s->addr + I2SFICS;
 368         else
 369                 fic = i2s->addr + I2SFIC;
 370
 371         /* Flush the FIFO */
 372         writel(readl(fic) | flush, fic);
 373
 374         /* Be patient */
 375         val = msecs_to_loops(1) / 1000; /* 1 usec */
 376         while (--val)
 377                 cpu_relax();
 378
 379         writel(readl(fic) & ~flush, fic);
 380 }
 381
 382 static int i2s_set_sysclk(struct snd_soc_dai *dai,
 383           int clk_id, unsigned int rfs, int dir)
 384 {
 385         struct i2s_dai *i2s = to_info(dai);
 386         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 387         u32 mod = readl(i2s->addr + I2SMOD);
 388
 389         switch (clk_id) {
 390         case SAMSUNG_I2S_CDCLK:
 391                 /* Shouldn't matter in GATING(CLOCK_IN) mode */
 392                 if (dir == SND_SOC_CLOCK_IN)
 393                         rfs = 0;
 394
 395                 if ((rfs && other->rfs && (other->rfs != rfs)) ||
 396                                 (any_active(i2s) &&
 397                                 (((dir == SND_SOC_CLOCK_IN)
 398                                         && !(mod & MOD_CDCLKCON)) ||
 399                                 ((dir == SND_SOC_CLOCK_OUT)
 400                                         && (mod & MOD_CDCLKCON))))) {
 401                         dev_err(&i2s->pdev->dev,
 402                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 403                         return -EAGAIN;
 404                 }
 405
 406                 if (dir == SND_SOC_CLOCK_IN)
 407                         mod |= MOD_CDCLKCON;
 408                 else
 409                         mod &= ~MOD_CDCLKCON;
 410
 411                 i2s->rfs = rfs;
 412                 break;
 413
 414         case SAMSUNG_I2S_RCLKSRC_0: /* clock corrsponding to IISMOD[10] := 0 */
 415         case SAMSUNG_I2S_RCLKSRC_1: /* clock corrsponding to IISMOD[10] := 1 */
 416                 if ((i2s->quirks & QUIRK_NO_MUXPSR)
 417                                 || (clk_id == SAMSUNG_I2S_RCLKSRC_0))
 418                         clk_id = 0;
 419                 else
 420                         clk_id = 1;
 421
 422                 if (!any_active(i2s)) {
 423                         if (i2s->op_clk) {
 424                                 if ((clk_id && !(mod & MOD_IMS_SYSMUX)) ||
 425                                         (!clk_id && (mod & MOD_IMS_SYSMUX))) {
 426                                         clk_disable(i2s->op_clk);
 427                                         clk_put(i2s->op_clk);
 428                                 } else {
 429                                         i2s->rclk_srcrate =
 430                                                 clk_get_rate(i2s->op_clk);
 431                                         return 0;
 432                                 }
 433                         }
 434
 435                         i2s->op_clk = clk_get(&i2s->pdev->dev,
 436                                                 i2s->src_clk[clk_id]);
 437                         clk_enable(i2s->op_clk);
 438                         i2s->rclk_srcrate = clk_get_rate(i2s->op_clk);
 439
 440                         /* Over-ride the other's */
 441                         if (other) {
 442                                 other->op_clk = i2s->op_clk;
 443                                 other->rclk_srcrate = i2s->rclk_srcrate;
 444                         }
 445                 } else if ((!clk_id && (mod & MOD_IMS_SYSMUX))
 446                                 || (clk_id && !(mod & MOD_IMS_SYSMUX))) {
 447                         dev_err(&i2s->pdev->dev,
 448                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 449                         return -EAGAIN;
 450                 } else {
 451                         /* Call can't be on the active DAI */
 452                         i2s->op_clk = other->op_clk;
 453                         i2s->rclk_srcrate = other->rclk_srcrate;
 454                         return 0;
 455                 }
 456
 457                 if (clk_id == 0)
 458                         mod &= ~MOD_IMS_SYSMUX;
 459                 else
 460                         mod |= MOD_IMS_SYSMUX;
 461                 break;
 462
 463         default:
 464                 dev_err(&i2s->pdev->dev, "We don't serve that!\n");
 465                 return -EINVAL;
 466         }
 467
 468         writel(mod, i2s->addr + I2SMOD);
 469
 470         return 0;
 471 }
 472
 473 static int i2s_set_fmt(struct snd_soc_dai *dai,
 474         unsigned int fmt)
 475 {
 476         struct i2s_dai *i2s = to_info(dai);
 477         u32 mod = readl(i2s->addr + I2SMOD);
 478         u32 tmp = 0;
 479
 480         /* Format is priority */
 481         switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
 482         case SND_SOC_DAIFMT_RIGHT_J:
 483                 tmp |= MOD_LR_RLOW;
 484                 tmp |= MOD_SDF_MSB;
 485                 break;
 486         case SND_SOC_DAIFMT_LEFT_J:
 487                 tmp |= MOD_LR_RLOW;
 488                 tmp |= MOD_SDF_LSB;
 489                 break;
 490         case SND_SOC_DAIFMT_I2S:
 491                 tmp |= MOD_SDF_IIS;
 492                 break;
 493         default:
 494                 dev_err(&i2s->pdev->dev, "Format not supported\n");
 495                 return -EINVAL;
 496         }
 497
 498         /*
 499          * INV flag is relative to the FORMAT flag - if set it simply
 500          * flips the polarity specified by the Standard
 501          */
 502         switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
 503         case SND_SOC_DAIFMT_NB_NF:
 504                 break;
 505         case SND_SOC_DAIFMT_NB_IF:
 506                 if (tmp & MOD_LR_RLOW)
 507                         tmp &= ~MOD_LR_RLOW;
 508                 else
 509                         tmp |= MOD_LR_RLOW;
 510                 break;
 511         default:
 512                 dev_err(&i2s->pdev->dev, "Polarity not supported\n");
 513                 return -EINVAL;
 514         }
 515
 516         switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
 517         case SND_SOC_DAIFMT_CBM_CFM:
 518                 tmp |= MOD_SLAVE;
 519                 break;
 520         case SND_SOC_DAIFMT_CBS_CFS:
 521                 /* Set default source clock in Master mode */
 522                 if (i2s->rclk_srcrate == 0)
 523                         i2s_set_sysclk(dai, SAMSUNG_I2S_RCLKSRC_0,
 524                                                         0, SND_SOC_CLOCK_IN);
 525                 break;
 526         default:
 527                 dev_err(&i2s->pdev->dev, "master/slave format not supported\n");
 528                 return -EINVAL;
 529         }
 530
 531         if (any_active(i2s) &&
 532                         ((mod & (MOD_SDF_MASK | MOD_LR_RLOW
 533                                 | MOD_SLAVE)) != tmp)) {
 534                 dev_err(&i2s->pdev->dev,
 535                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 536                 return -EAGAIN;
 537         }
 538
 539         mod &= ~(MOD_SDF_MASK | MOD_LR_RLOW | MOD_SLAVE);
 540         mod |= tmp;
 541         writel(mod, i2s->addr + I2SMOD);
 542
 543         return 0;
 544 }
 545
 546 static int i2s_hw_params(struct snd_pcm_substream *substream,
 547         struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
 548 {
 549         struct i2s_dai *i2s = to_info(dai);
 550         u32 mod = readl(i2s->addr + I2SMOD);
 551
 552         if (!is_secondary(i2s))
 553                 mod &= ~(MOD_DC2_EN | MOD_DC1_EN);
 554
 555         switch (params_channels(params)) {
 556         case 6:
 557                 mod |= MOD_DC2_EN;
 558         case 4:
 559                 mod |= MOD_DC1_EN;
 560                 break;
 561         case 2:
 562                 break;
 563         default:
 564                 dev_err(&i2s->pdev->dev, "%d channels not supported\n",
 565                                 params_channels(params));
 566                 return -EINVAL;
 567         }
 568
 569         if (is_secondary(i2s))
 570                 mod &= ~MOD_BLCS_MASK;
 571         else
 572                 mod &= ~MOD_BLCP_MASK;
 573
 574         if (is_manager(i2s))
 575                 mod &= ~MOD_BLC_MASK;
 576
 577         switch (params_format(params)) {
 578         case SNDRV_PCM_FORMAT_S8:
 579                 if (is_secondary(i2s))
 580                         mod |= MOD_BLCS_8BIT;
 581                 else
 582                         mod |= MOD_BLCP_8BIT;
 583                 if (is_manager(i2s))
 584                         mod |= MOD_BLC_8BIT;
 585                 break;
 586         case SNDRV_PCM_FORMAT_S16_LE:
 587                 if (is_secondary(i2s))
 588                         mod |= MOD_BLCS_16BIT;
 589                 else
 590                         mod |= MOD_BLCP_16BIT;
 591                 if (is_manager(i2s))
 592                         mod |= MOD_BLC_16BIT;
 593                 break;
 594         case SNDRV_PCM_FORMAT_S24_LE:
 595                 if (is_secondary(i2s))
 596                         mod |= MOD_BLCS_24BIT;
 597                 else
 598                         mod |= MOD_BLCP_24BIT;
 599                 if (is_manager(i2s))
 600                         mod |= MOD_BLC_24BIT;
 601                 break;
 602         default:
 603                 dev_err(&i2s->pdev->dev, "Format(%d) not supported\n",
 604                                 params_format(params));
 605                 return -EINVAL;
 606         }
 607         writel(mod, i2s->addr + I2SMOD);
 608
 609         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
 610                 snd_soc_dai_set_dma_data(dai, substream,
 611                         (void *)&i2s->dma_playback);
 612         else
 613                 snd_soc_dai_set_dma_data(dai, substream,
 614                         (void *)&i2s->dma_capture);
 615
 616         i2s->frmclk = params_rate(params);
 617
 618         return 0;
 619 }
 620
 621 /* We set constraints on the substream acc to the version of I2S */
 622 static int i2s_startup(struct snd_pcm_substream *substream,
 623           struct snd_soc_dai *dai)
 624 {
 625         struct i2s_dai *i2s = to_info(dai);
 626         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 627         unsigned long flags;
 628
 629         spin_lock_irqsave(&lock, flags);
 630
 631         i2s->mode |= DAI_OPENED;
 632
 633         if (is_manager(other))
 634                 i2s->mode &= ~DAI_MANAGER;
 635         else
 636                 i2s->mode |= DAI_MANAGER;
 637
 638         /* Enforce set_sysclk in Master mode */
 639         i2s->rclk_srcrate = 0;
 640
 641         spin_unlock_irqrestore(&lock, flags);
 642
 643         return 0;
 644 }
 645
 646 static void i2s_shutdown(struct snd_pcm_substream *substream,
 647         struct snd_soc_dai *dai)
 648 {
 649         struct i2s_dai *i2s = to_info(dai);
 650         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 651         unsigned long flags;
 652
 653         spin_lock_irqsave(&lock, flags);
 654
 655         i2s->mode &= ~DAI_OPENED;
 656         i2s->mode &= ~DAI_MANAGER;
 657
 658         if (is_opened(other))
 659                 other->mode |= DAI_MANAGER;
 660
 661         /* Reset any constraint on RFS and BFS */
 662         i2s->rfs = 0;
 663         i2s->bfs = 0;
 664
 665         spin_unlock_irqrestore(&lock, flags);
 666
 667         /* Gate CDCLK by default */
 668         if (!is_opened(other))
 669                 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
 670                                 0, SND_SOC_CLOCK_IN);
 671 }
 672
 673 static int config_setup(struct i2s_dai *i2s)
 674 {
 675         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 676         unsigned rfs, bfs, blc;
 677         u32 psr;
 678
 679         blc = get_blc(i2s);
 680
 681         bfs = i2s->bfs;
 682
 683         if (!bfs && other)
 684                 bfs = other->bfs;
 685
 686         /* Select least possible multiple(2) if no constraint set */
 687         if (!bfs)
 688                 bfs = blc * 2;
 689
 690         rfs = i2s->rfs;
 691
 692         if (!rfs && other)
 693                 rfs = other->rfs;
 694
 695         if ((rfs == 256 || rfs == 512) && (blc == 24)) {
 696                 dev_err(&i2s->pdev->dev,
 697                         "%d-RFS not supported for 24-blc\n", rfs);
 698                 return -EINVAL;
 699         }
 700
 701         if (!rfs) {
 702                 if (bfs == 16 || bfs == 32)
 703                         rfs = 256;
 704                 else
 705                         rfs = 384;
 706         }
 707
 708         /* If already setup and running */
 709         if (any_active(i2s) && (get_rfs(i2s) != rfs || get_bfs(i2s) != bfs)) {
 710                 dev_err(&i2s->pdev->dev,
 711                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 712                 return -EAGAIN;
 713         }
 714
 715         /* Don't bother RFS, BFS & PSR in Slave mode */
 716         if (is_slave(i2s))
 717                 return 0;
 718
 719         set_bfs(i2s, bfs);
 720         set_rfs(i2s, rfs);
 721
 722         if (!(i2s->quirks & QUIRK_NO_MUXPSR)) {
 723                 psr = i2s->rclk_srcrate / i2s->frmclk / rfs;
 724                 writel(((psr - 1) << 8) | PSR_PSREN, i2s->addr + I2SPSR);
 725                 dev_dbg(&i2s->pdev->dev,
 726                         "RCLK_SRC=%luHz PSR=%u, RCLK=%dfs, BCLK=%dfs\n",
 727                                 i2s->rclk_srcrate, psr, rfs, bfs);
 728         }
 729
 730         return 0;
 731 }
 732
 733 static int i2s_trigger(struct snd_pcm_substream *substream,
 734         int cmd, struct snd_soc_dai *dai)
 735 {
 736         int capture = (substream->stream == SNDRV_PCM_STREAM_CAPTURE);
 737         struct snd_soc_pcm_runtime *rtd = substream->private_data;
 738         struct i2s_dai *i2s = to_info(rtd->cpu_dai);
 739         unsigned long flags;
 740
 741         switch (cmd) {
 742         case SNDRV_PCM_TRIGGER_START:
 743         case SNDRV_PCM_TRIGGER_RESUME:
 744         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 745                 local_irq_save(flags);
 746
 747                 if (config_setup(i2s)) {
 748                         local_irq_restore(flags);
 749                         return -EINVAL;
 750                 }
 751
 752                 if (capture)
 753                         i2s_rxctrl(i2s, 1);
 754                 else
 755                         i2s_txctrl(i2s, 1);
 756
 757                 local_irq_restore(flags);
 758                 break;
 759         case SNDRV_PCM_TRIGGER_STOP:
 760         case SNDRV_PCM_TRIGGER_SUSPEND:
 761         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 762                 local_irq_save(flags);
 763
 764                 if (capture) {
 765                         i2s_rxctrl(i2s, 0);
 766                         i2s_fifo(i2s, FIC_RXFLUSH);
 767                 } else {
 768                         i2s_txctrl(i2s, 0);
 769                         i2s_fifo(i2s, FIC_TXFLUSH);
 770                 }
 771
 772                 local_irq_restore(flags);
 773                 break;
 774         }
 775
 776         return 0;
 777 }
 778
 779 static int i2s_set_clkdiv(struct snd_soc_dai *dai,
 780         int div_id, int div)
 781 {
 782         struct i2s_dai *i2s = to_info(dai);
 783         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 784
 785         switch (div_id) {
 786         case SAMSUNG_I2S_DIV_BCLK:
 787                 if ((any_active(i2s) && div && (get_bfs(i2s) != div))
 788                         || (other && other->bfs && (other->bfs != div))) {
 789                         dev_err(&i2s->pdev->dev,
 790                                 "%s:%d Other DAI busy\n", __func__, __LINE__);
 791                         return -EAGAIN;
 792                 }
 793                 i2s->bfs = div;
 794                 break;
 795         default:
 796                 dev_err(&i2s->pdev->dev,
 797                         "Invalid clock divider(%d)\n", div_id);
 798                 return -EINVAL;
 799         }
 800
 801         return 0;
 802 }
 803
 804 static snd_pcm_sframes_t
 805 i2s_delay(struct snd_pcm_substream *substream, struct snd_soc_dai *dai)
 806 {
 807         struct i2s_dai *i2s = to_info(dai);
 808         u32 reg = readl(i2s->addr + I2SFIC);
 809         snd_pcm_sframes_t delay;
 810
 811         if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 812                 delay = FIC_RXCOUNT(reg);
 813         else if (is_secondary(i2s))
 814                 delay = FICS_TXCOUNT(readl(i2s->addr + I2SFICS));
 815         else
 816                 delay = FIC_TXCOUNT(reg);
 817
 818         return delay;
 819 }
 820
 821 #ifdef CONFIG_PM
 822 static int i2s_suspend(struct snd_soc_dai *dai)
 823 {
 824         struct i2s_dai *i2s = to_info(dai);
 825
 826         if (dai->active) {
 827                 i2s->suspend_i2smod = readl(i2s->addr + I2SMOD);
 828                 i2s->suspend_i2scon = readl(i2s->addr + I2SCON);
 829                 i2s->suspend_i2spsr = readl(i2s->addr + I2SPSR);
 830         }
 831
 832         return 0;
 833 }
 834
 835 static int i2s_resume(struct snd_soc_dai *dai)
 836 {
 837         struct i2s_dai *i2s = to_info(dai);
 838
 839         if (dai->active) {
 840                 writel(i2s->suspend_i2scon, i2s->addr + I2SCON);
 841                 writel(i2s->suspend_i2smod, i2s->addr + I2SMOD);
 842                 writel(i2s->suspend_i2spsr, i2s->addr + I2SPSR);
 843         }
 844
 845         return 0;
 846 }
 847 #else
 848 #define i2s_suspend NULL
 849 #define i2s_resume  NULL
 850 #endif
 851
 852 static int samsung_i2s_dai_probe(struct snd_soc_dai *dai)
 853 {
 854         struct i2s_dai *i2s = to_info(dai);
 855         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 856
 857         if (other && other->clk) /* If this is probe on secondary */
 858                 goto probe_exit;
 859
 860         i2s->addr = ioremap(i2s->base, 0x100);
 861         if (i2s->addr == NULL) {
 862                 dev_err(&i2s->pdev->dev, "cannot ioremap registers\n");
 863                 return -ENXIO;
 864         }
 865
 866         i2s->clk = clk_get(&i2s->pdev->dev, "iis");
 867         if (IS_ERR(i2s->clk)) {
 868                 dev_err(&i2s->pdev->dev, "failed to get i2s_clock\n");
 869                 iounmap(i2s->addr);
 870                 return -ENOENT;
 871         }
 872         clk_enable(i2s->clk);
 873
 874         if (other) {
 875                 other->addr = i2s->addr;
 876                 other->clk = i2s->clk;
 877         }
 878
 879         if (i2s->quirks & QUIRK_NEED_RSTCLR)
 880                 writel(CON_RSTCLR, i2s->addr + I2SCON);
 881
 882         if (i2s->quirks & QUIRK_SEC_DAI)
 883                 idma_reg_addr_init(i2s->addr,
 884                                         i2s->sec_dai->idma_playback.dma_addr);
 885
 886 probe_exit:
 887         /* Reset any constraint on RFS and BFS */
 888         i2s->rfs = 0;
 889         i2s->bfs = 0;
 890         i2s_txctrl(i2s, 0);
 891         i2s_rxctrl(i2s, 0);
 892         i2s_fifo(i2s, FIC_TXFLUSH);
 893         i2s_fifo(other, FIC_TXFLUSH);
 894         i2s_fifo(i2s, FIC_RXFLUSH);
 895
 896         /* Gate CDCLK by default */
 897         if (!is_opened(other))
 898                 i2s_set_sysclk(dai, SAMSUNG_I2S_CDCLK,
 899                                 0, SND_SOC_CLOCK_IN);
 900
 901         return 0;
 902 }
 903
 904 static int samsung_i2s_dai_remove(struct snd_soc_dai *dai)
 905 {
 906         struct i2s_dai *i2s = snd_soc_dai_get_drvdata(dai);
 907         struct i2s_dai *other = i2s->pri_dai ? : i2s->sec_dai;
 908
 909         if (!other || !other->clk) {
 910
 911                 if (i2s->quirks & QUIRK_NEED_RSTCLR)
 912                         writel(0, i2s->addr + I2SCON);
 913
 914                 clk_disable(i2s->clk);
 915                 clk_put(i2s->clk);
 916
 917                 iounmap(i2s->addr);
 918         }
 919
 920         i2s->clk = NULL;
 921
 922         return 0;
 923 }
 924
 925 static const struct snd_soc_dai_ops samsung_i2s_dai_ops = {
 926         .trigger = i2s_trigger,
 927         .hw_params = i2s_hw_params,
 928         .set_fmt = i2s_set_fmt,
 929         .set_clkdiv = i2s_set_clkdiv,
 930         .set_sysclk = i2s_set_sysclk,
 931         .startup = i2s_startup,
 932         .shutdown = i2s_shutdown,
 933         .delay = i2s_delay,
 934 };
 935
 936 #define SAMSUNG_I2S_RATES       SNDRV_PCM_RATE_8000_96000
 937
 938 #define SAMSUNG_I2S_FMTS        (SNDRV_PCM_FMTBIT_S8 | \
 939                                         SNDRV_PCM_FMTBIT_S16_LE | \
 940                                         SNDRV_PCM_FMTBIT_S24_LE)
 941
 942 static __devinit
 943 struct i2s_dai *i2s_alloc_dai(struct platform_device *pdev, bool sec)
 944 {
 945         struct i2s_dai *i2s;
 946
 947         i2s = devm_kzalloc(&pdev->dev, sizeof(struct i2s_dai), GFP_KERNEL);
 948         if (i2s == NULL)
 949                 return NULL;
 950
 951         i2s->pdev = pdev;
 952         i2s->pri_dai = NULL;
 953         i2s->sec_dai = NULL;
 954         i2s->i2s_dai_drv.symmetric_rates = 1;
 955         i2s->i2s_dai_drv.probe = samsung_i2s_dai_probe;
 956         i2s->i2s_dai_drv.remove = samsung_i2s_dai_remove;
 957         i2s->i2s_dai_drv.ops = &samsung_i2s_dai_ops;
 958         i2s->i2s_dai_drv.suspend = i2s_suspend;
 959         i2s->i2s_dai_drv.resume = i2s_resume;
 960         i2s->i2s_dai_drv.playback.channels_min = 2;
 961         i2s->i2s_dai_drv.playback.channels_max = 2;
 962         i2s->i2s_dai_drv.playback.rates = SAMSUNG_I2S_RATES;
 963         i2s->i2s_dai_drv.playback.formats = SAMSUNG_I2S_FMTS;
 964
 965         if (!sec) {
 966                 i2s->i2s_dai_drv.capture.channels_min = 2;
 967                 i2s->i2s_dai_drv.capture.channels_max = 2;
 968                 i2s->i2s_dai_drv.capture.rates = SAMSUNG_I2S_RATES;
 969                 i2s->i2s_dai_drv.capture.formats = SAMSUNG_I2S_FMTS;
 970         } else {        /* Create a new platform_device for Secondary */
 971                 i2s->pdev = platform_device_register_resndata(NULL,
 972                                 pdev->name, pdev->id + SAMSUNG_I2S_SECOFF,
 973                                 NULL, 0, NULL, 0);
 974                 if (IS_ERR(i2s->pdev))
 975                         return NULL;
 976         }
 977
 978         /* Pre-assign snd_soc_dai_set_drvdata */
 979         dev_set_drvdata(&i2s->pdev->dev, i2s);
 980
 981         return i2s;
 982 }
 983
 984 static __devinit int samsung_i2s_probe(struct platform_device *pdev)
 985 {
 986         u32 dma_pl_chan, dma_cp_chan, dma_pl_sec_chan;
 987         struct i2s_dai *pri_dai, *sec_dai = NULL;
 988         struct s3c_audio_pdata *i2s_pdata;
 989         struct samsung_i2s *i2s_cfg;
 990         struct resource *res;
 991         u32 regs_base, quirks;
 992         int ret = 0;
 993
 994         /* Call during Seconday interface registration */
 995         if (pdev->id >= SAMSUNG_I2S_SECOFF) {
 996                 sec_dai = dev_get_drvdata(&pdev->dev);
 997                 snd_soc_register_dai(&sec_dai->pdev->dev,
 998                         &sec_dai->i2s_dai_drv);
 999                 return 0;
1000         }
1001
1002         i2s_pdata = pdev->dev.platform_data;
1003         if (i2s_pdata == NULL) {
1004                 dev_err(&pdev->dev, "Can't work without s3c_audio_pdata\n");
1005                 return -EINVAL;
1006         }
1007
1008         res = platform_get_resource(pdev, IORESOURCE_DMA, 0);
1009         if (!res) {
1010                 dev_err(&pdev->dev, "Unable to get I2S-TX dma resource\n");
1011                 return -ENXIO;
1012         }
1013         dma_pl_chan = res->start;
1014
1015         res = platform_get_resource(pdev, IORESOURCE_DMA, 1);
1016         if (!res) {
1017                 dev_err(&pdev->dev, "Unable to get I2S-RX dma resource\n");
1018                 return -ENXIO;
1019         }
1020         dma_cp_chan = res->start;
1021
1022         res = platform_get_resource(pdev, IORESOURCE_DMA, 2);
1023         if (res)
1024                 dma_pl_sec_chan = res->start;
1025         else
1026                 dma_pl_sec_chan = 0;
1027
1028         res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1029         if (!res) {
1030                 dev_err(&pdev->dev, "Unable to get I2S SFR address\n");
1031                 return -ENXIO;
1032         }
1033
1034         if (!request_mem_region(res->start, resource_size(res),
1035                                                         "samsung-i2s")) {
1036                 dev_err(&pdev->dev, "Unable to request SFR region\n");
1037                 return -EBUSY;
1038         }
1039         regs_base = res->start;
1040
1041         i2s_cfg = &i2s_pdata->type.i2s;
1042         quirks = i2s_cfg->quirks;
1043
1044         pri_dai = i2s_alloc_dai(pdev, false);
1045         if (!pri_dai) {
1046                 dev_err(&pdev->dev, "Unable to alloc I2S_pri\n");
1047                 ret = -ENOMEM;
1048                 goto err;
1049         }
1050
1051         pri_dai->dma_playback.dma_addr = regs_base + I2STXD;
1052         pri_dai->dma_capture.dma_addr = regs_base + I2SRXD;
1053         pri_dai->dma_playback.client =
1054                 (struct s3c2410_dma_client *)&pri_dai->dma_playback;
1055         pri_dai->dma_capture.client =
1056                 (struct s3c2410_dma_client *)&pri_dai->dma_capture;
1057         pri_dai->dma_playback.channel = dma_pl_chan;
1058         pri_dai->dma_capture.channel = dma_cp_chan;
1059         pri_dai->src_clk = i2s_cfg->src_clk;
1060         pri_dai->dma_playback.dma_size = 4;
1061         pri_dai->dma_capture.dma_size = 4;
1062         pri_dai->base = regs_base;
1063         pri_dai->quirks = quirks;
1064
1065         if (quirks & QUIRK_PRI_6CHAN)
1066                 pri_dai->i2s_dai_drv.playback.channels_max = 6;
1067
1068         if (quirks & QUIRK_SEC_DAI) {
1069                 sec_dai = i2s_alloc_dai(pdev, true);
1070                 if (!sec_dai) {
1071                         dev_err(&pdev->dev, "Unable to alloc I2S_sec\n");
1072                         ret = -ENOMEM;
1073                         goto err;
1074                 }
1075                 sec_dai->dma_playback.dma_addr = regs_base + I2STXDS;
1076                 sec_dai->dma_playback.client =
1077                         (struct s3c2410_dma_client *)&sec_dai->dma_playback;
1078                 /* Use iDMA always if SysDMA not provided */
1079                 sec_dai->dma_playback.channel = dma_pl_sec_chan ? : -1;
1080                 sec_dai->src_clk = i2s_cfg->src_clk;
1081                 sec_dai->dma_playback.dma_size = 4;
1082                 sec_dai->base = regs_base;
1083                 sec_dai->quirks = quirks;
1084                 sec_dai->idma_playback.dma_addr = i2s_cfg->idma_addr;
1085                 sec_dai->pri_dai = pri_dai;
1086                 pri_dai->sec_dai = sec_dai;
1087         }
1088
1089         if (i2s_pdata->cfg_gpio && i2s_pdata->cfg_gpio(pdev)) {
1090                 dev_err(&pdev->dev, "Unable to configure gpio\n");
1091                 ret = -EINVAL;
1092                 goto err;
1093         }
1094
1095         snd_soc_register_dai(&pri_dai->pdev->dev, &pri_dai->i2s_dai_drv);
1096
1097         pm_runtime_enable(&pdev->dev);
1098
1099         return 0;
1100 err:
1101         release_mem_region(regs_base, resource_size(res));
1102
1103         return ret;
1104 }
1105
1106 static __devexit int samsung_i2s_remove(struct platform_device *pdev)
1107 {
1108         struct i2s_dai *i2s, *other;
1109         struct resource *res;
1110
1111         i2s = dev_get_drvdata(&pdev->dev);
1112         other = i2s->pri_dai ? : i2s->sec_dai;
1113
1114         if (other) {
1115                 other->pri_dai = NULL;
1116                 other->sec_dai = NULL;
1117         } else {
1118                 pm_runtime_disable(&pdev->dev);
1119                 res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1120                 if (res)
1121                         release_mem_region(res->start, resource_size(res));
1122         }
1123
1124         i2s->pri_dai = NULL;
1125         i2s->sec_dai = NULL;
1126
1127         snd_soc_unregister_dai(&pdev->dev);
1128
1129         return 0;
1130 }
1131
1132 static struct platform_driver samsung_i2s_driver = {
1133         .probe  = samsung_i2s_probe,
1134         .remove = __devexit_p(samsung_i2s_remove),
1135         .driver = {
1136                 .name = "samsung-i2s",
1137                 .owner = THIS_MODULE,
1138         },
1139 };
1140
1141 module_platform_driver(samsung_i2s_driver);
1142
1143 /* Module information */
1144 MODULE_AUTHOR("Jaswinder Singh, <jassi.brar@samsung.com>");
1145 MODULE_DESCRIPTION("Samsung I2S Interface");
1146 MODULE_ALIAS("platform:samsung-i2s");
1147 MODULE_LICENSE("GPL");