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   1 /*
   2  *  linux/drivers/mmc/s3cmci.h - Samsung S3C MCI driver
   3  *
   4  *  Copyright (C) 2004-2006 maintech GmbH, Thomas Kleffel <tk@maintech.de>
   5  *
   6  * This program is free software; you can redistribute it and/or modify
   7  * it under the terms of the GNU General Public License version 2 as
   8  * published by the Free Software Foundation.
   9  */
  10
  11 #include <linux/module.h>
  12 #include <linux/dma-mapping.h>
  13 #include <linux/clk.h>
  14 #include <linux/mmc/host.h>
  15 #include <linux/platform_device.h>
  16 #include <linux/irq.h>
  17 #include <linux/io.h>
  18
  19 #include <asm/dma.h>
  20
  21 #include <asm/arch/regs-sdi.h>
  22 #include <asm/arch/regs-gpio.h>
  23
  24 #include "s3cmci.h"
  25
  26 #define DRIVER_NAME "s3c-mci"
  27
  28 enum dbg_channels {
  29         dbg_err   = (1 << 0),
  30         dbg_debug = (1 << 1),
  31         dbg_info  = (1 << 2),
  32         dbg_irq   = (1 << 3),
  33         dbg_sg    = (1 << 4),
  34         dbg_dma   = (1 << 5),
  35         dbg_pio   = (1 << 6),
  36         dbg_fail  = (1 << 7),
  37         dbg_conf  = (1 << 8),
  38 };
  39
  40 static const int dbgmap_err   = dbg_err | dbg_fail;
  41 static const int dbgmap_info  = dbg_info | dbg_conf;
  42 static const int dbgmap_debug = dbg_debug;
  43
  44 #define dbg(host, channels, args...)              \
  45         do {                                      \
  46         if (dbgmap_err & channels)                \
  47                 dev_err(&host->pdev->dev, args);  \
  48         else if (dbgmap_info & channels)          \
  49                 dev_info(&host->pdev->dev, args); \
  50         else if (dbgmap_debug & channels)         \
  51                 dev_dbg(&host->pdev->dev, args);  \
  52         } while (0)
  53
  54 #define RESSIZE(ressource) (((ressource)->end - (ressource)->start)+1)
  55
  56 static struct s3c2410_dma_client s3cmci_dma_client = {
  57         .name           = "s3c-mci",
  58 };
  59
  60 static void finalize_request(struct s3cmci_host *host);
  61 static void s3cmci_send_request(struct mmc_host *mmc);
  62 static void s3cmci_reset(struct s3cmci_host *host);
  63
  64 #ifdef CONFIG_MMC_DEBUG
  65
  66 static void dbg_dumpregs(struct s3cmci_host *host, char *prefix)
  67 {
  68         u32 con, pre, cmdarg, cmdcon, cmdsta, r0, r1, r2, r3, timer, bsize;
  69         u32 datcon, datcnt, datsta, fsta, imask;
  70
  71         con     = readl(host->base + S3C2410_SDICON);
  72         pre     = readl(host->base + S3C2410_SDIPRE);
  73         cmdarg  = readl(host->base + S3C2410_SDICMDARG);
  74         cmdcon  = readl(host->base + S3C2410_SDICMDCON);
  75         cmdsta  = readl(host->base + S3C2410_SDICMDSTAT);
  76         r0      = readl(host->base + S3C2410_SDIRSP0);
  77         r1      = readl(host->base + S3C2410_SDIRSP1);
  78         r2      = readl(host->base + S3C2410_SDIRSP2);
  79         r3      = readl(host->base + S3C2410_SDIRSP3);
  80         timer   = readl(host->base + S3C2410_SDITIMER);
  81         bsize   = readl(host->base + S3C2410_SDIBSIZE);
  82         datcon  = readl(host->base + S3C2410_SDIDCON);
  83         datcnt  = readl(host->base + S3C2410_SDIDCNT);
  84         datsta  = readl(host->base + S3C2410_SDIDSTA);
  85         fsta    = readl(host->base + S3C2410_SDIFSTA);
  86         imask   = readl(host->base + host->sdiimsk);
  87
  88         dbg(host, dbg_debug, "%s  CON:[%08x]  PRE:[%08x]  TMR:[%08x]\n",
  89                                 prefix, con, pre, timer);
  90
  91         dbg(host, dbg_debug, "%s CCON:[%08x] CARG:[%08x] CSTA:[%08x]\n",
  92                                 prefix, cmdcon, cmdarg, cmdsta);
  93
  94         dbg(host, dbg_debug, "%s DCON:[%08x] FSTA:[%08x]"
  95                                " DSTA:[%08x] DCNT:[%08x]\n",
  96                                 prefix, datcon, fsta, datsta, datcnt);
  97
  98         dbg(host, dbg_debug, "%s   R0:[%08x]   R1:[%08x]"
  99                                "   R2:[%08x]   R3:[%08x]\n",
 100                                 prefix, r0, r1, r2, r3);
 101 }
 102
 103 static void prepare_dbgmsg(struct s3cmci_host *host, struct mmc_command *cmd,
 104                            int stop)
 105 {
 106         snprintf(host->dbgmsg_cmd, 300,
 107                  "#%u%s op:%i arg:0x%08x flags:0x08%x retries:%u",
 108                  host->ccnt, (stop ? " (STOP)" : ""),
 109                  cmd->opcode, cmd->arg, cmd->flags, cmd->retries);
 110
 111         if (cmd->data) {
 112                 snprintf(host->dbgmsg_dat, 300,
 113                          "#%u bsize:%u blocks:%u bytes:%u",
 114                          host->dcnt, cmd->data->blksz,
 115                          cmd->data->blocks,
 116                          cmd->data->blocks * cmd->data->blksz);
 117         } else {
 118                 host->dbgmsg_dat[0] = '\0';
 119         }
 120 }
 121
 122 static void dbg_dumpcmd(struct s3cmci_host *host, struct mmc_command *cmd,
 123                         int fail)
 124 {
 125         unsigned int dbglvl = fail ? dbg_fail : dbg_debug;
 126
 127         if (!cmd)
 128                 return;
 129
 130         if (cmd->error == 0) {
 131                 dbg(host, dbglvl, "CMD[OK] %s R0:0x%08x\n",
 132                         host->dbgmsg_cmd, cmd->resp[0]);
 133         } else {
 134                 dbg(host, dbglvl, "CMD[ERR %i] %s Status:%s\n",
 135                         cmd->error, host->dbgmsg_cmd, host->status);
 136         }
 137
 138         if (!cmd->data)
 139                 return;
 140
 141         if (cmd->data->error == 0) {
 142                 dbg(host, dbglvl, "DAT[OK] %s\n", host->dbgmsg_dat);
 143         } else {
 144                 dbg(host, dbglvl, "DAT[ERR %i] %s DCNT:0x%08x\n",
 145                         cmd->data->error, host->dbgmsg_dat,
 146                         readl(host->base + S3C2410_SDIDCNT));
 147         }
 148 }
 149 #else
 150 static void dbg_dumpcmd(struct s3cmci_host *host,
 151                         struct mmc_command *cmd, int fail) { }
 152
 153 static void prepare_dbgmsg(struct s3cmci_host *host, struct mmc_command *cmd,
 154                            int stop) { }
 155
 156 static void dbg_dumpregs(struct s3cmci_host *host, char *prefix) { }
 157
 158 #endif /* CONFIG_MMC_DEBUG */
 159
 160 static inline u32 enable_imask(struct s3cmci_host *host, u32 imask)
 161 {
 162         u32 newmask;
 163
 164         newmask = readl(host->base + host->sdiimsk);
 165         newmask |= imask;
 166
 167         writel(newmask, host->base + host->sdiimsk);
 168
 169         return newmask;
 170 }
 171
 172 static inline u32 disable_imask(struct s3cmci_host *host, u32 imask)
 173 {
 174         u32 newmask;
 175
 176         newmask = readl(host->base + host->sdiimsk);
 177         newmask &= ~imask;
 178
 179         writel(newmask, host->base + host->sdiimsk);
 180
 181         return newmask;
 182 }
 183
 184 static inline void clear_imask(struct s3cmci_host *host)
 185 {
 186         writel(0, host->base + host->sdiimsk);
 187 }
 188
 189 static inline int get_data_buffer(struct s3cmci_host *host,
 190                                   u32 *words, u32 **pointer)
 191 {
 192         struct scatterlist *sg;
 193
 194         if (host->pio_active == XFER_NONE)
 195                 return -EINVAL;
 196
 197         if ((!host->mrq) || (!host->mrq->data))
 198                 return -EINVAL;
 199
 200         if (host->pio_sgptr >= host->mrq->data->sg_len) {
 201                 dbg(host, dbg_debug, "no more buffers (%i/%i)\n",
 202                       host->pio_sgptr, host->mrq->data->sg_len);
 203                 return -EBUSY;
 204         }
 205         sg = &host->mrq->data->sg[host->pio_sgptr];
 206
 207         *words = sg->length >> 2;
 208         *pointer = sg_virt(sg);
 209
 210         host->pio_sgptr++;
 211
 212         dbg(host, dbg_sg, "new buffer (%i/%i)\n",
 213             host->pio_sgptr, host->mrq->data->sg_len);
 214
 215         return 0;
 216 }
 217
 218 static inline u32 fifo_count(struct s3cmci_host *host)
 219 {
 220         u32 fifostat = readl(host->base + S3C2410_SDIFSTA);
 221
 222         fifostat &= S3C2410_SDIFSTA_COUNTMASK;
 223         return fifostat >> 2;
 224 }
 225
 226 static inline u32 fifo_free(struct s3cmci_host *host)
 227 {
 228         u32 fifostat = readl(host->base + S3C2410_SDIFSTA);
 229
 230         fifostat &= S3C2410_SDIFSTA_COUNTMASK;
 231         return (63 - fifostat) >> 2;
 232 }
 233
 234 static void do_pio_read(struct s3cmci_host *host)
 235 {
 236         int res;
 237         u32 fifo;
 238         void __iomem *from_ptr;
 239
 240         /* write real prescaler to host, it might be set slow to fix */
 241         writel(host->prescaler, host->base + S3C2410_SDIPRE);
 242
 243         from_ptr = host->base + host->sdidata;
 244
 245         while ((fifo = fifo_count(host))) {
 246                 if (!host->pio_words) {
 247                         res = get_data_buffer(host, &host->pio_words,
 248                                               &host->pio_ptr);
 249                         if (res) {
 250                                 host->pio_active = XFER_NONE;
 251                                 host->complete_what = COMPLETION_FINALIZE;
 252
 253                                 dbg(host, dbg_pio, "pio_read(): "
 254                                     "complete (no more data).\n");
 255                                 return;
 256                         }
 257
 258                         dbg(host, dbg_pio,
 259                             "pio_read(): new target: [%i]@[%p]\n",
 260                             host->pio_words, host->pio_ptr);
 261                 }
 262
 263                 dbg(host, dbg_pio,
 264                     "pio_read(): fifo:[%02i] buffer:[%03i] dcnt:[%08X]\n",
 265                     fifo, host->pio_words,
 266                     readl(host->base + S3C2410_SDIDCNT));
 267
 268                 if (fifo > host->pio_words)
 269                         fifo = host->pio_words;
 270
 271                 host->pio_words -= fifo;
 272                 host->pio_count += fifo;
 273
 274                 while (fifo--)
 275                         *(host->pio_ptr++) = readl(from_ptr);
 276         }
 277
 278         if (!host->pio_words) {
 279                 res = get_data_buffer(host, &host->pio_words, &host->pio_ptr);
 280                 if (res) {
 281                         dbg(host, dbg_pio,
 282                             "pio_read(): complete (no more buffers).\n");
 283                         host->pio_active = XFER_NONE;
 284                         host->complete_what = COMPLETION_FINALIZE;
 285
 286                         return;
 287                 }
 288         }
 289
 290         enable_imask(host,
 291                      S3C2410_SDIIMSK_RXFIFOHALF | S3C2410_SDIIMSK_RXFIFOLAST);
 292 }
 293
 294 static void do_pio_write(struct s3cmci_host *host)
 295 {
 296         void __iomem *to_ptr;
 297         int res;
 298         u32 fifo;
 299
 300         to_ptr = host->base + host->sdidata;
 301
 302         while ((fifo = fifo_free(host))) {
 303                 if (!host->pio_words) {
 304                         res = get_data_buffer(host, &host->pio_words,
 305                                                         &host->pio_ptr);
 306                         if (res) {
 307                                 dbg(host, dbg_pio,
 308                                     "pio_write(): complete (no more data).\n");
 309                                 host->pio_active = XFER_NONE;
 310
 311                                 return;
 312                         }
 313
 314                         dbg(host, dbg_pio,
 315                             "pio_write(): new source: [%i]@[%p]\n",
 316                             host->pio_words, host->pio_ptr);
 317
 318                 }
 319
 320                 if (fifo > host->pio_words)
 321                         fifo = host->pio_words;
 322
 323                 host->pio_words -= fifo;
 324                 host->pio_count += fifo;
 325
 326                 while (fifo--)
 327                         writel(*(host->pio_ptr++), to_ptr);
 328         }
 329
 330         enable_imask(host, S3C2410_SDIIMSK_TXFIFOHALF);
 331 }
 332
 333 static void pio_tasklet(unsigned long data)
 334 {
 335         struct s3cmci_host *host = (struct s3cmci_host *) data;
 336
 337
 338         if (host->pio_active == XFER_WRITE)
 339                 do_pio_write(host);
 340
 341         if (host->pio_active == XFER_READ)
 342                 do_pio_read(host);
 343
 344         if (host->complete_what == COMPLETION_FINALIZE) {
 345                 clear_imask(host);
 346                 if (host->pio_active != XFER_NONE) {
 347                         dbg(host, dbg_err, "unfinished %s "
 348                             "- pio_count:[%u] pio_words:[%u]\n",
 349                             (host->pio_active == XFER_READ) ? "read" : "write",
 350                             host->pio_count, host->pio_words);
 351
 352                         host->mrq->data->error = -EINVAL;
 353                 }
 354
 355                 disable_irq(host->irq);
 356                 finalize_request(host);
 357         }
 358 }
 359
 360 /*
 361  * ISR for SDI Interface IRQ
 362  * Communication between driver and ISR works as follows:
 363  *   host->mrq                  points to current request
 364  *   host->complete_what        Indicates when the request is considered done
 365  *     COMPLETION_CMDSENT         when the command was sent
 366  *     COMPLETION_RSPFIN          when a response was received
 367  *     COMPLETION_XFERFINISH      when the data transfer is finished
 368  *     COMPLETION_XFERFINISH_RSPFIN both of the above.
 369  *   host->complete_request     is the completion-object the driver waits for
 370  *
 371  * 1) Driver sets up host->mrq and host->complete_what
 372  * 2) Driver prepares the transfer
 373  * 3) Driver enables interrupts
 374  * 4) Driver starts transfer
 375  * 5) Driver waits for host->complete_rquest
 376  * 6) ISR checks for request status (errors and success)
 377  * 6) ISR sets host->mrq->cmd->error and host->mrq->data->error
 378  * 7) ISR completes host->complete_request
 379  * 8) ISR disables interrupts
 380  * 9) Driver wakes up and takes care of the request
 381  *
 382  * Note: "->error"-fields are expected to be set to 0 before the request
 383  *       was issued by mmc.c - therefore they are only set, when an error
 384  *       contition comes up
 385  */
 386
 387 static irqreturn_t s3cmci_irq(int irq, void *dev_id)
 388 {
 389         struct s3cmci_host *host = dev_id;
 390         struct mmc_command *cmd;
 391         u32 mci_csta, mci_dsta, mci_fsta, mci_dcnt, mci_imsk;
 392         u32 mci_cclear, mci_dclear;
 393         unsigned long iflags;
 394
 395         spin_lock_irqsave(&host->complete_lock, iflags);
 396
 397         mci_csta = readl(host->base + S3C2410_SDICMDSTAT);
 398         mci_dsta = readl(host->base + S3C2410_SDIDSTA);
 399         mci_dcnt = readl(host->base + S3C2410_SDIDCNT);
 400         mci_fsta = readl(host->base + S3C2410_SDIFSTA);
 401         mci_imsk = readl(host->base + host->sdiimsk);
 402         mci_cclear = 0;
 403         mci_dclear = 0;
 404
 405         if ((host->complete_what == COMPLETION_NONE) ||
 406             (host->complete_what == COMPLETION_FINALIZE)) {
 407                 host->status = "nothing to complete";
 408                 clear_imask(host);
 409                 goto irq_out;
 410         }
 411
 412         if (!host->mrq) {
 413                 host->status = "no active mrq";
 414                 clear_imask(host);
 415                 goto irq_out;
 416         }
 417
 418         cmd = host->cmd_is_stop ? host->mrq->stop : host->mrq->cmd;
 419
 420         if (!cmd) {
 421                 host->status = "no active cmd";
 422                 clear_imask(host);
 423                 goto irq_out;
 424         }
 425
 426         if (!host->dodma) {
 427                 if ((host->pio_active == XFER_WRITE) &&
 428                     (mci_fsta & S3C2410_SDIFSTA_TFDET)) {
 429
 430                         disable_imask(host, S3C2410_SDIIMSK_TXFIFOHALF);
 431                         tasklet_schedule(&host->pio_tasklet);
 432                         host->status = "pio tx";
 433                 }
 434
 435                 if ((host->pio_active == XFER_READ) &&
 436                     (mci_fsta & S3C2410_SDIFSTA_RFDET)) {
 437
 438                         disable_imask(host,
 439                                       S3C2410_SDIIMSK_RXFIFOHALF |
 440                                       S3C2410_SDIIMSK_RXFIFOLAST);
 441
 442                         tasklet_schedule(&host->pio_tasklet);
 443                         host->status = "pio rx";
 444                 }
 445         }
 446
 447         if (mci_csta & S3C2410_SDICMDSTAT_CMDTIMEOUT) {
 448                 cmd->error = -ETIMEDOUT;
 449                 host->status = "error: command timeout";
 450                 goto fail_transfer;
 451         }
 452
 453         if (mci_csta & S3C2410_SDICMDSTAT_CMDSENT) {
 454                 if (host->complete_what == COMPLETION_CMDSENT) {
 455                         host->status = "ok: command sent";
 456                         goto close_transfer;
 457                 }
 458
 459                 mci_cclear |= S3C2410_SDICMDSTAT_CMDSENT;
 460         }
 461
 462         if (mci_csta & S3C2410_SDICMDSTAT_CRCFAIL) {
 463                 if (cmd->flags & MMC_RSP_CRC) {
 464                         if (host->mrq->cmd->flags & MMC_RSP_136) {
 465                                 dbg(host, dbg_irq,
 466                                     "fixup: ignore CRC fail with long rsp\n");
 467                         } else {
 468                                 /* note, we used to fail the transfer
 469                                  * here, but it seems that this is just
 470                                  * the hardware getting it wrong.
 471                                  *
 472                                  * cmd->error = -EILSEQ;
 473                                  * host->status = "error: bad command crc";
 474                                  * goto fail_transfer;
 475                                 */
 476                         }
 477                 }
 478
 479                 mci_cclear |= S3C2410_SDICMDSTAT_CRCFAIL;
 480         }
 481
 482         if (mci_csta & S3C2410_SDICMDSTAT_RSPFIN) {
 483                 if (host->complete_what == COMPLETION_RSPFIN) {
 484                         host->status = "ok: command response received";
 485                         goto close_transfer;
 486                 }
 487
 488                 if (host->complete_what == COMPLETION_XFERFINISH_RSPFIN)
 489                         host->complete_what = COMPLETION_XFERFINISH;
 490
 491                 mci_cclear |= S3C2410_SDICMDSTAT_RSPFIN;
 492         }
 493
 494         /* errors handled after this point are only relevant
 495            when a data transfer is in progress */
 496
 497         if (!cmd->data)
 498                 goto clear_status_bits;
 499
 500         /* Check for FIFO failure */
 501         if (host->is2440) {
 502                 if (mci_fsta & S3C2440_SDIFSTA_FIFOFAIL) {
 503                         host->mrq->data->error = -EILSEQ;
 504                         host->status = "error: 2440 fifo failure";
 505                         goto fail_transfer;
 506                 }
 507         } else {
 508                 if (mci_dsta & S3C2410_SDIDSTA_FIFOFAIL) {
 509                         cmd->data->error = -EILSEQ;
 510                         host->status = "error:  fifo failure";
 511                         goto fail_transfer;
 512                 }
 513         }
 514
 515         if (mci_dsta & S3C2410_SDIDSTA_RXCRCFAIL) {
 516                 cmd->data->error = -EILSEQ;
 517                 host->status = "error: bad data crc (outgoing)";
 518                 goto fail_transfer;
 519         }
 520
 521         if (mci_dsta & S3C2410_SDIDSTA_CRCFAIL) {
 522                 cmd->data->error = -EILSEQ;
 523                 host->status = "error: bad data crc (incoming)";
 524                 goto fail_transfer;
 525         }
 526
 527         if (mci_dsta & S3C2410_SDIDSTA_DATATIMEOUT) {
 528                 cmd->data->error = -ETIMEDOUT;
 529                 host->status = "error: data timeout";
 530                 goto fail_transfer;
 531         }
 532
 533         if (mci_dsta & S3C2410_SDIDSTA_XFERFINISH) {
 534                 if (host->complete_what == COMPLETION_XFERFINISH) {
 535                         host->status = "ok: data transfer completed";
 536                         goto close_transfer;
 537                 }
 538
 539                 if (host->complete_what == COMPLETION_XFERFINISH_RSPFIN)
 540                         host->complete_what = COMPLETION_RSPFIN;
 541
 542                 mci_dclear |= S3C2410_SDIDSTA_XFERFINISH;
 543         }
 544
 545 clear_status_bits:
 546         writel(mci_cclear, host->base + S3C2410_SDICMDSTAT);
 547         writel(mci_dclear, host->base + S3C2410_SDIDSTA);
 548
 549         goto irq_out;
 550
 551 fail_transfer:
 552         host->pio_active = XFER_NONE;
 553
 554 close_transfer:
 555         host->complete_what = COMPLETION_FINALIZE;
 556
 557         clear_imask(host);
 558         tasklet_schedule(&host->pio_tasklet);
 559
 560         goto irq_out;
 561
 562 irq_out:
 563         dbg(host, dbg_irq,
 564             "csta:0x%08x dsta:0x%08x fsta:0x%08x dcnt:0x%08x status:%s.\n",
 565             mci_csta, mci_dsta, mci_fsta, mci_dcnt, host->status);
 566
 567         spin_unlock_irqrestore(&host->complete_lock, iflags);
 568         return IRQ_HANDLED;
 569
 570 }
 571
 572 /*
 573  * ISR for the CardDetect Pin
 574 */
 575
 576 static irqreturn_t s3cmci_irq_cd(int irq, void *dev_id)
 577 {
 578         struct s3cmci_host *host = (struct s3cmci_host *)dev_id;
 579
 580         dbg(host, dbg_irq, "card detect\n");
 581
 582         mmc_detect_change(host->mmc, 500);
 583
 584         return IRQ_HANDLED;
 585 }
 586
 587 void s3cmci_dma_done_callback(struct s3c2410_dma_chan *dma_ch, void *buf_id,
 588                               int size, enum s3c2410_dma_buffresult result)
 589 {
 590         struct s3cmci_host *host = buf_id;
 591         unsigned long iflags;
 592         u32 mci_csta, mci_dsta, mci_fsta, mci_dcnt;
 593
 594         mci_csta = readl(host->base + S3C2410_SDICMDSTAT);
 595         mci_dsta = readl(host->base + S3C2410_SDIDSTA);
 596         mci_fsta = readl(host->base + S3C2410_SDIFSTA);
 597         mci_dcnt = readl(host->base + S3C2410_SDIDCNT);
 598
 599         BUG_ON(!host->mrq);
 600         BUG_ON(!host->mrq->data);
 601         BUG_ON(!host->dmatogo);
 602
 603         spin_lock_irqsave(&host->complete_lock, iflags);
 604
 605         if (result != S3C2410_RES_OK) {
 606                 dbg(host, dbg_fail, "DMA FAILED: csta=0x%08x dsta=0x%08x "
 607                         "fsta=0x%08x dcnt:0x%08x result:0x%08x toGo:%u\n",
 608                         mci_csta, mci_dsta, mci_fsta,
 609                         mci_dcnt, result, host->dmatogo);
 610
 611                 goto fail_request;
 612         }
 613
 614         host->dmatogo--;
 615         if (host->dmatogo) {
 616                 dbg(host, dbg_dma, "DMA DONE  Size:%i DSTA:[%08x] "
 617                         "DCNT:[%08x] toGo:%u\n",
 618                         size, mci_dsta, mci_dcnt, host->dmatogo);
 619
 620                 goto out;
 621         }
 622
 623         dbg(host, dbg_dma, "DMA FINISHED Size:%i DSTA:%08x DCNT:%08x\n",
 624                 size, mci_dsta, mci_dcnt);
 625
 626         host->complete_what = COMPLETION_FINALIZE;
 627
 628 out:
 629         tasklet_schedule(&host->pio_tasklet);
 630         spin_unlock_irqrestore(&host->complete_lock, iflags);
 631         return;
 632
 633
 634 fail_request:
 635         host->mrq->data->error = -EINVAL;
 636         host->complete_what = COMPLETION_FINALIZE;
 637         writel(0, host->base + host->sdiimsk);
 638         goto out;
 639
 640 }
 641
 642 static void finalize_request(struct s3cmci_host *host)
 643 {
 644         struct mmc_request *mrq = host->mrq;
 645         struct mmc_command *cmd = host->cmd_is_stop ? mrq->stop : mrq->cmd;
 646         int debug_as_failure = 0;
 647
 648         if (host->complete_what != COMPLETION_FINALIZE)
 649                 return;
 650
 651         if (!mrq)
 652                 return;
 653
 654         if (cmd->data && (cmd->error == 0) &&
 655             (cmd->data->error == 0)) {
 656                 if (host->dodma && (!host->dma_complete)) {
 657                         dbg(host, dbg_dma, "DMA Missing!\n");
 658                         return;
 659                 }
 660         }
 661
 662         /* Read response from controller. */
 663         cmd->resp[0] = readl(host->base + S3C2410_SDIRSP0);
 664         cmd->resp[1] = readl(host->base + S3C2410_SDIRSP1);
 665         cmd->resp[2] = readl(host->base + S3C2410_SDIRSP2);
 666         cmd->resp[3] = readl(host->base + S3C2410_SDIRSP3);
 667
 668         writel(host->prescaler, host->base + S3C2410_SDIPRE);
 669
 670         if (cmd->error)
 671                 debug_as_failure = 1;
 672
 673         if (cmd->data && cmd->data->error)
 674                 debug_as_failure = 1;
 675
 676         dbg_dumpcmd(host, cmd, debug_as_failure);
 677
 678         /* Cleanup controller */
 679         writel(0, host->base + S3C2410_SDICMDARG);
 680         writel(S3C2410_SDIDCON_STOP, host->base + S3C2410_SDIDCON);
 681         writel(0, host->base + S3C2410_SDICMDCON);
 682         writel(0, host->base + host->sdiimsk);
 683
 684         if (cmd->data && cmd->error)
 685                 cmd->data->error = cmd->error;
 686
 687         if (cmd->data && cmd->data->stop && (!host->cmd_is_stop)) {
 688                 host->cmd_is_stop = 1;
 689                 s3cmci_send_request(host->mmc);
 690                 return;
 691         }
 692
 693         /* If we have no data transfer we are finished here */
 694         if (!mrq->data)
 695                 goto request_done;
 696
 697         /* Calulate the amout of bytes transfer if there was no error */
 698         if (mrq->data->error == 0) {
 699                 mrq->data->bytes_xfered =
 700                         (mrq->data->blocks * mrq->data->blksz);
 701         } else {
 702                 mrq->data->bytes_xfered = 0;
 703         }
 704
 705         /* If we had an error while transfering data we flush the
 706          * DMA channel and the fifo to clear out any garbage. */
 707         if (mrq->data->error != 0) {
 708                 if (host->dodma)
 709                         s3c2410_dma_ctrl(host->dma, S3C2410_DMAOP_FLUSH);
 710
 711                 if (host->is2440) {
 712                         /* Clear failure register and reset fifo. */
 713                         writel(S3C2440_SDIFSTA_FIFORESET |
 714                                S3C2440_SDIFSTA_FIFOFAIL,
 715                                host->base + S3C2410_SDIFSTA);
 716                 } else {
 717                         u32 mci_con;
 718
 719                         /* reset fifo */
 720                         mci_con = readl(host->base + S3C2410_SDICON);
 721                         mci_con |= S3C2410_SDICON_FIFORESET;
 722
 723                         writel(mci_con, host->base + S3C2410_SDICON);
 724                 }
 725         }
 726
 727 request_done:
 728         host->complete_what = COMPLETION_NONE;
 729         host->mrq = NULL;
 730         mmc_request_done(host->mmc, mrq);
 731 }
 732
 733
 734 void s3cmci_dma_setup(struct s3cmci_host *host, enum s3c2410_dmasrc source)
 735 {
 736         static enum s3c2410_dmasrc last_source = -1;
 737         static int setup_ok;
 738
 739         if (last_source == source)
 740                 return;
 741
 742         last_source = source;
 743
 744         s3c2410_dma_devconfig(host->dma, source, 3,
 745                               host->mem->start + host->sdidata);
 746
 747         if (!setup_ok) {
 748                 s3c2410_dma_config(host->dma, 4,
 749                         (S3C2410_DCON_HWTRIG | S3C2410_DCON_CH0_SDI));
 750                 s3c2410_dma_set_buffdone_fn(host->dma,
 751                                             s3cmci_dma_done_callback);
 752                 s3c2410_dma_setflags(host->dma, S3C2410_DMAF_AUTOSTART);
 753                 setup_ok = 1;
 754         }
 755 }
 756
 757 static void s3cmci_send_command(struct s3cmci_host *host,
 758                                         struct mmc_command *cmd)
 759 {
 760         u32 ccon, imsk;
 761
 762         imsk  = S3C2410_SDIIMSK_CRCSTATUS | S3C2410_SDIIMSK_CMDTIMEOUT |
 763                 S3C2410_SDIIMSK_RESPONSEND | S3C2410_SDIIMSK_CMDSENT |
 764                 S3C2410_SDIIMSK_RESPONSECRC;
 765
 766         enable_imask(host, imsk);
 767
 768         if (cmd->data)
 769                 host->complete_what = COMPLETION_XFERFINISH_RSPFIN;
 770         else if (cmd->flags & MMC_RSP_PRESENT)
 771                 host->complete_what = COMPLETION_RSPFIN;
 772         else
 773                 host->complete_what = COMPLETION_CMDSENT;
 774
 775         writel(cmd->arg, host->base + S3C2410_SDICMDARG);
 776
 777         ccon  = cmd->opcode & S3C2410_SDICMDCON_INDEX;
 778         ccon |= S3C2410_SDICMDCON_SENDERHOST | S3C2410_SDICMDCON_CMDSTART;
 779
 780         if (cmd->flags & MMC_RSP_PRESENT)
 781                 ccon |= S3C2410_SDICMDCON_WAITRSP;
 782
 783         if (cmd->flags & MMC_RSP_136)
 784                 ccon |= S3C2410_SDICMDCON_LONGRSP;
 785
 786         writel(ccon, host->base + S3C2410_SDICMDCON);
 787 }
 788
 789 static int s3cmci_setup_data(struct s3cmci_host *host, struct mmc_data *data)
 790 {
 791         u32 dcon, imsk, stoptries = 3;
 792
 793         /* write DCON register */
 794
 795         if (!data) {
 796                 writel(0, host->base + S3C2410_SDIDCON);
 797                 return 0;
 798         }
 799
 800         while (readl(host->base + S3C2410_SDIDSTA) &
 801                (S3C2410_SDIDSTA_TXDATAON | S3C2410_SDIDSTA_RXDATAON)) {
 802
 803                 dbg(host, dbg_err,
 804                     "mci_setup_data() transfer stillin progress.\n");
 805
 806                 writel(S3C2410_SDIDCON_STOP, host->base + S3C2410_SDIDCON);
 807                 s3cmci_reset(host);
 808
 809                 if ((stoptries--) == 0) {
 810                         dbg_dumpregs(host, "DRF");
 811                         return -EINVAL;
 812                 }
 813         }
 814
 815         dcon  = data->blocks & S3C2410_SDIDCON_BLKNUM_MASK;
 816
 817         if (host->dodma)
 818                 dcon |= S3C2410_SDIDCON_DMAEN;
 819
 820         if (host->bus_width == MMC_BUS_WIDTH_4)
 821                 dcon |= S3C2410_SDIDCON_WIDEBUS;
 822
 823         if (!(data->flags & MMC_DATA_STREAM))
 824                 dcon |= S3C2410_SDIDCON_BLOCKMODE;
 825
 826         if (data->flags & MMC_DATA_WRITE) {
 827                 dcon |= S3C2410_SDIDCON_TXAFTERRESP;
 828                 dcon |= S3C2410_SDIDCON_XFER_TXSTART;
 829         }
 830
 831         if (data->flags & MMC_DATA_READ) {
 832                 dcon |= S3C2410_SDIDCON_RXAFTERCMD;
 833                 dcon |= S3C2410_SDIDCON_XFER_RXSTART;
 834         }
 835
 836         if (host->is2440) {
 837                 dcon |= S3C2440_SDIDCON_DS_WORD;
 838                 dcon |= S3C2440_SDIDCON_DATSTART;
 839         }
 840
 841         writel(dcon, host->base + S3C2410_SDIDCON);
 842
 843         /* write BSIZE register */
 844
 845         writel(data->blksz, host->base + S3C2410_SDIBSIZE);
 846
 847         /* add to IMASK register */
 848         imsk = S3C2410_SDIIMSK_FIFOFAIL | S3C2410_SDIIMSK_DATACRC |
 849                S3C2410_SDIIMSK_DATATIMEOUT | S3C2410_SDIIMSK_DATAFINISH;
 850
 851         enable_imask(host, imsk);
 852
 853         /* write TIMER register */
 854
 855         if (host->is2440) {
 856                 writel(0x007FFFFF, host->base + S3C2410_SDITIMER);
 857         } else {
 858                 writel(0x0000FFFF, host->base + S3C2410_SDITIMER);
 859
 860                 /* FIX: set slow clock to prevent timeouts on read */
 861                 if (data->flags & MMC_DATA_READ)
 862                         writel(0xFF, host->base + S3C2410_SDIPRE);
 863         }
 864
 865         return 0;
 866 }
 867
 868 #define BOTH_DIR (MMC_DATA_WRITE | MMC_DATA_READ)
 869
 870 static int s3cmci_prepare_pio(struct s3cmci_host *host, struct mmc_data *data)
 871 {
 872         int rw = (data->flags & MMC_DATA_WRITE) ? 1 : 0;
 873
 874         BUG_ON((data->flags & BOTH_DIR) == BOTH_DIR);
 875
 876         host->pio_sgptr = 0;
 877         host->pio_words = 0;
 878         host->pio_count = 0;
 879         host->pio_active = rw ? XFER_WRITE : XFER_READ;
 880
 881         if (rw) {
 882                 do_pio_write(host);
 883                 enable_imask(host, S3C2410_SDIIMSK_TXFIFOHALF);
 884         } else {
 885                 enable_imask(host, S3C2410_SDIIMSK_RXFIFOHALF
 886                              | S3C2410_SDIIMSK_RXFIFOLAST);
 887         }
 888
 889         return 0;
 890 }
 891
 892 static int s3cmci_prepare_dma(struct s3cmci_host *host, struct mmc_data *data)
 893 {
 894         int dma_len, i;
 895         int rw = (data->flags & MMC_DATA_WRITE) ? 1 : 0;
 896
 897         BUG_ON((data->flags & BOTH_DIR) == BOTH_DIR);
 898
 899         s3cmci_dma_setup(host, rw ? S3C2410_DMASRC_MEM : S3C2410_DMASRC_HW);
 900         s3c2410_dma_ctrl(host->dma, S3C2410_DMAOP_FLUSH);
 901
 902         dma_len = dma_map_sg(mmc_dev(host->mmc), data->sg, data->sg_len,
 903                              (rw) ? DMA_TO_DEVICE : DMA_FROM_DEVICE);
 904
 905         if (dma_len == 0)
 906                 return -ENOMEM;
 907
 908         host->dma_complete = 0;
 909         host->dmatogo = dma_len;
 910
 911         for (i = 0; i < dma_len; i++) {
 912                 int res;
 913
 914                 dbg(host, dbg_dma, "enqueue %i:%u@%u\n", i,
 915                         sg_dma_address(&data->sg[i]),
 916                         sg_dma_len(&data->sg[i]));
 917
 918                 res = s3c2410_dma_enqueue(host->dma, (void *) host,
 919                                           sg_dma_address(&data->sg[i]),
 920                                           sg_dma_len(&data->sg[i]));
 921
 922                 if (res) {
 923                         s3c2410_dma_ctrl(host->dma, S3C2410_DMAOP_FLUSH);
 924                         return -EBUSY;
 925                 }
 926         }
 927
 928         s3c2410_dma_ctrl(host->dma, S3C2410_DMAOP_START);
 929
 930         return 0;
 931 }
 932
 933 static void s3cmci_send_request(struct mmc_host *mmc)
 934 {
 935         struct s3cmci_host *host = mmc_priv(mmc);
 936         struct mmc_request *mrq = host->mrq;
 937         struct mmc_command *cmd = host->cmd_is_stop ? mrq->stop : mrq->cmd;
 938
 939         host->ccnt++;
 940         prepare_dbgmsg(host, cmd, host->cmd_is_stop);
 941
 942         /* Clear command, data and fifo status registers
 943            Fifo clear only necessary on 2440, but doesn't hurt on 2410
 944         */
 945         writel(0xFFFFFFFF, host->base + S3C2410_SDICMDSTAT);
 946         writel(0xFFFFFFFF, host->base + S3C2410_SDIDSTA);
 947         writel(0xFFFFFFFF, host->base + S3C2410_SDIFSTA);
 948
 949         if (cmd->data) {
 950                 int res = s3cmci_setup_data(host, cmd->data);
 951
 952                 host->dcnt++;
 953
 954                 if (res) {
 955                         cmd->error = -EINVAL;
 956                         cmd->data->error = -EINVAL;
 957
 958                         mmc_request_done(mmc, mrq);
 959                         return;
 960                 }
 961
 962                 if (host->dodma)
 963                         res = s3cmci_prepare_dma(host, cmd->data);
 964                 else
 965                         res = s3cmci_prepare_pio(host, cmd->data);
 966
 967                 if (res) {
 968                         cmd->error = res;
 969                         cmd->data->error = res;
 970
 971                         mmc_request_done(mmc, mrq);
 972                         return;
 973                 }
 974         }
 975
 976         /* Send command */
 977         s3cmci_send_command(host, cmd);
 978
 979         /* Enable Interrupt */
 980         enable_irq(host->irq);
 981 }
 982
 983 static void s3cmci_request(struct mmc_host *mmc, struct mmc_request *mrq)
 984 {
 985         struct s3cmci_host *host = mmc_priv(mmc);
 986
 987         host->status = "mmc request";
 988         host->cmd_is_stop = 0;
 989         host->mrq = mrq;
 990
 991         s3cmci_send_request(mmc);
 992 }
 993
 994 static void s3cmci_set_ios(struct mmc_host *mmc, struct mmc_ios *ios)
 995 {
 996         struct s3cmci_host *host = mmc_priv(mmc);
 997         u32 mci_psc, mci_con;
 998
 999         /* Set the power state */
1000
1001         mci_con = readl(host->base + S3C2410_SDICON);
1002
1003         switch (ios->power_mode) {
1004         case MMC_POWER_ON:
1005         case MMC_POWER_UP:
1006                 s3c2410_gpio_cfgpin(S3C2410_GPE5, S3C2410_GPE5_SDCLK);
1007                 s3c2410_gpio_cfgpin(S3C2410_GPE6, S3C2410_GPE6_SDCMD);
1008                 s3c2410_gpio_cfgpin(S3C2410_GPE7, S3C2410_GPE7_SDDAT0);
1009                 s3c2410_gpio_cfgpin(S3C2410_GPE8, S3C2410_GPE8_SDDAT1);
1010                 s3c2410_gpio_cfgpin(S3C2410_GPE9, S3C2410_GPE9_SDDAT2);
1011                 s3c2410_gpio_cfgpin(S3C2410_GPE10, S3C2410_GPE10_SDDAT3);
1012
1013                 if (!host->is2440)
1014                         mci_con |= S3C2410_SDICON_FIFORESET;
1015
1016                 break;
1017
1018         case MMC_POWER_OFF:
1019         default:
1020                 s3c2410_gpio_setpin(S3C2410_GPE5, 0);
1021                 s3c2410_gpio_cfgpin(S3C2410_GPE5, S3C2410_GPE5_OUTP);
1022
1023                 if (host->is2440)
1024                         mci_con |= S3C2440_SDICON_SDRESET;
1025
1026                 break;
1027         }
1028
1029         /* Set clock */
1030         for (mci_psc = 0; mci_psc < 255; mci_psc++) {
1031                 host->real_rate = host->clk_rate / (host->clk_div*(mci_psc+1));
1032
1033                 if (host->real_rate <= ios->clock)
1034                         break;
1035         }
1036
1037         if (mci_psc > 255)
1038                 mci_psc = 255;
1039
1040         host->prescaler = mci_psc;
1041         writel(host->prescaler, host->base + S3C2410_SDIPRE);
1042
1043         /* If requested clock is 0, real_rate will be 0, too */
1044         if (ios->clock == 0)
1045                 host->real_rate = 0;
1046
1047         /* Set CLOCK_ENABLE */
1048         if (ios->clock)
1049                 mci_con |= S3C2410_SDICON_CLOCKTYPE;
1050         else
1051                 mci_con &= ~S3C2410_SDICON_CLOCKTYPE;
1052
1053         writel(mci_con, host->base + S3C2410_SDICON);
1054
1055         if ((ios->power_mode == MMC_POWER_ON) ||
1056             (ios->power_mode == MMC_POWER_UP)) {
1057                 dbg(host, dbg_conf, "running at %lukHz (requested: %ukHz).\n",
1058                         host->real_rate/1000, ios->clock/1000);
1059         } else {
1060                 dbg(host, dbg_conf, "powered down.\n");
1061         }
1062
1063         host->bus_width = ios->bus_width;
1064 }
1065
1066 static void s3cmci_reset(struct s3cmci_host *host)
1067 {
1068         u32 con = readl(host->base + S3C2410_SDICON);
1069
1070         con |= S3C2440_SDICON_SDRESET;
1071         writel(con, host->base + S3C2410_SDICON);
1072 }
1073
1074 static struct mmc_host_ops s3cmci_ops = {
1075         .request        = s3cmci_request,
1076         .set_ios        = s3cmci_set_ios,
1077 };
1078
1079 static int __devinit s3cmci_probe(struct platform_device *pdev, int is2440)
1080 {
1081         struct s3cmci_host *host;
1082         struct mmc_host *mmc;
1083         int ret;
1084
1085         mmc = mmc_alloc_host(sizeof(struct s3cmci_host), &pdev->dev);
1086         if (!mmc) {
1087                 ret = -ENOMEM;
1088                 goto probe_out;
1089         }
1090
1091         host = mmc_priv(mmc);
1092         host->mmc       = mmc;
1093         host->pdev      = pdev;
1094         host->is2440    = is2440;
1095
1096         spin_lock_init(&host->complete_lock);
1097         tasklet_init(&host->pio_tasklet, pio_tasklet, (unsigned long) host);
1098
1099         if (is2440) {
1100                 host->sdiimsk   = S3C2440_SDIIMSK;
1101                 host->sdidata   = S3C2440_SDIDATA;
1102                 host->clk_div   = 1;
1103         } else {
1104                 host->sdiimsk   = S3C2410_SDIIMSK;
1105                 host->sdidata   = S3C2410_SDIDATA;
1106                 host->clk_div   = 2;
1107         }
1108
1109         host->dodma             = 0;
1110         host->complete_what     = COMPLETION_NONE;
1111         host->pio_active        = XFER_NONE;
1112
1113         host->dma               = S3CMCI_DMA;
1114         host->irq_cd            = IRQ_EINT2;
1115
1116         host->mem = platform_get_resource(pdev, IORESOURCE_MEM, 0);
1117         if (!host->mem) {
1118                 dev_err(&pdev->dev,
1119                         "failed to get io memory region resouce.\n");
1120
1121                 ret = -ENOENT;
1122                 goto probe_free_host;
1123         }
1124
1125         host->mem = request_mem_region(host->mem->start,
1126                                        RESSIZE(host->mem), pdev->name);
1127
1128         if (!host->mem) {
1129                 dev_err(&pdev->dev, "failed to request io memory region.\n");
1130                 ret = -ENOENT;
1131                 goto probe_free_host;
1132         }
1133
1134         host->base = ioremap(host->mem->start, RESSIZE(host->mem));
1135         if (host->base == 0) {
1136                 dev_err(&pdev->dev, "failed to ioremap() io memory region.\n");
1137                 ret = -EINVAL;
1138                 goto probe_free_mem_region;
1139         }
1140
1141         host->irq = platform_get_irq(pdev, 0);
1142         if (host->irq == 0) {
1143                 dev_err(&pdev->dev, "failed to get interrupt resouce.\n");
1144                 ret = -EINVAL;
1145                 goto probe_iounmap;
1146         }
1147
1148         if (request_irq(host->irq, s3cmci_irq, 0, DRIVER_NAME, host)) {
1149                 dev_err(&pdev->dev, "failed to request mci interrupt.\n");
1150                 ret = -ENOENT;
1151                 goto probe_iounmap;
1152         }
1153
1154         /* We get spurious interrupts even when we have set the IMSK
1155          * register to ignore everything, so use disable_irq() to make
1156          * ensure we don't lock the system with un-serviceable requests. */
1157
1158         disable_irq(host->irq);
1159
1160         s3c2410_gpio_cfgpin(S3C2410_GPF2, S3C2410_GPF2_EINT2);
1161         set_irq_type(host->irq_cd, IRQT_BOTHEDGE);
1162
1163         if (request_irq(host->irq_cd, s3cmci_irq_cd, 0, DRIVER_NAME, host)) {
1164                 dev_err(&pdev->dev,
1165                         "failed to request card detect interrupt.\n");
1166                 ret = -ENOENT;
1167                 goto probe_free_irq;
1168         }
1169
1170         if (s3c2410_dma_request(S3CMCI_DMA, &s3cmci_dma_client, NULL)) {
1171                 dev_err(&pdev->dev, "unable to get DMA channel.\n");
1172                 ret = -EBUSY;
1173                 goto probe_free_irq_cd;
1174         }
1175
1176         host->clk = clk_get(&pdev->dev, "sdi");
1177         if (IS_ERR(host->clk)) {
1178                 dev_err(&pdev->dev, "failed to find clock source.\n");
1179                 ret = PTR_ERR(host->clk);
1180                 host->clk = NULL;
1181                 goto probe_free_host;
1182         }
1183
1184         ret = clk_enable(host->clk);
1185         if (ret) {
1186                 dev_err(&pdev->dev, "failed to enable clock source.\n");
1187                 goto clk_free;
1188         }
1189
1190         host->clk_rate = clk_get_rate(host->clk);
1191
1192         mmc->ops        = &s3cmci_ops;
1193         mmc->ocr_avail  = MMC_VDD_32_33;
1194         mmc->caps       = MMC_CAP_4_BIT_DATA;
1195         mmc->f_min      = host->clk_rate / (host->clk_div * 256);
1196         mmc->f_max      = host->clk_rate / host->clk_div;
1197
1198         mmc->max_blk_count      = 4095;
1199         mmc->max_blk_size       = 4095;
1200         mmc->max_req_size       = 4095 * 512;
1201         mmc->max_seg_size       = mmc->max_req_size;
1202
1203         mmc->max_phys_segs      = 128;
1204         mmc->max_hw_segs        = 128;
1205
1206         dbg(host, dbg_debug,
1207             "probe: mode:%s mapped mci_base:%p irq:%u irq_cd:%u dma:%u.\n",
1208             (host->is2440?"2440":""),
1209             host->base, host->irq, host->irq_cd, host->dma);
1210
1211         ret = mmc_add_host(mmc);
1212         if (ret) {
1213                 dev_err(&pdev->dev, "failed to add mmc host.\n");
1214                 goto free_dmabuf;
1215         }
1216
1217         platform_set_drvdata(pdev, mmc);
1218         dev_info(&pdev->dev, "initialisation done.\n");
1219
1220         return 0;
1221
1222  free_dmabuf:
1223         clk_disable(host->clk);
1224
1225  clk_free:
1226         clk_put(host->clk);
1227
1228  probe_free_irq_cd:
1229         free_irq(host->irq_cd, host);
1230
1231  probe_free_irq:
1232         free_irq(host->irq, host);
1233
1234  probe_iounmap:
1235         iounmap(host->base);
1236
1237  probe_free_mem_region:
1238         release_mem_region(host->mem->start, RESSIZE(host->mem));
1239
1240  probe_free_host:
1241         mmc_free_host(mmc);
1242  probe_out:
1243         return ret;
1244 }
1245
1246 static int __devexit s3cmci_remove(struct platform_device *pdev)
1247 {
1248         struct mmc_host         *mmc  = platform_get_drvdata(pdev);
1249         struct s3cmci_host      *host = mmc_priv(mmc);
1250
1251         mmc_remove_host(mmc);
1252
1253         clk_disable(host->clk);
1254         clk_put(host->clk);
1255
1256         tasklet_disable(&host->pio_tasklet);
1257         s3c2410_dma_free(S3CMCI_DMA, &s3cmci_dma_client);
1258
1259         free_irq(host->irq_cd, host);
1260         free_irq(host->irq, host);
1261
1262         iounmap(host->base);
1263         release_mem_region(host->mem->start, RESSIZE(host->mem));
1264
1265         mmc_free_host(mmc);
1266         return 0;
1267 }
1268
1269 static int __devinit s3cmci_probe_2410(struct platform_device *dev)
1270 {
1271         return s3cmci_probe(dev, 0);
1272 }
1273
1274 static int __devinit s3cmci_probe_2412(struct platform_device *dev)
1275 {
1276         return s3cmci_probe(dev, 1);
1277 }
1278
1279 static int __devinit s3cmci_probe_2440(struct platform_device *dev)
1280 {
1281         return s3cmci_probe(dev, 1);
1282 }
1283
1284 #ifdef CONFIG_PM
1285
1286 static int s3cmci_suspend(struct platform_device *dev, pm_message_t state)
1287 {
1288         struct mmc_host *mmc = platform_get_drvdata(dev);
1289
1290         return  mmc_suspend_host(mmc, state);
1291 }
1292
1293 static int s3cmci_resume(struct platform_device *dev)
1294 {
1295         struct mmc_host *mmc = platform_get_drvdata(dev);
1296
1297         return mmc_resume_host(mmc);
1298 }
1299
1300 #else /* CONFIG_PM */
1301 #define s3cmci_suspend NULL
1302 #define s3cmci_resume NULL
1303 #endif /* CONFIG_PM */
1304
1305
1306 static struct platform_driver s3cmci_driver_2410 = {
1307         .driver.name    = "s3c2410-sdi",
1308         .driver.owner   = THIS_MODULE,
1309         .probe          = s3cmci_probe_2410,
1310         .remove         = __devexit_p(s3cmci_remove),
1311         .suspend        = s3cmci_suspend,
1312         .resume         = s3cmci_resume,
1313 };
1314
1315 static struct platform_driver s3cmci_driver_2412 = {
1316         .driver.name    = "s3c2412-sdi",
1317         .driver.owner   = THIS_MODULE,
1318         .probe          = s3cmci_probe_2412,
1319         .remove         = __devexit_p(s3cmci_remove),
1320         .suspend        = s3cmci_suspend,
1321         .resume         = s3cmci_resume,
1322 };
1323
1324 static struct platform_driver s3cmci_driver_2440 = {
1325         .driver.name    = "s3c2440-sdi",
1326         .driver.owner   = THIS_MODULE,
1327         .probe          = s3cmci_probe_2440,
1328         .remove         = __devexit_p(s3cmci_remove),
1329         .suspend        = s3cmci_suspend,
1330         .resume         = s3cmci_resume,
1331 };
1332
1333
1334 static int __init s3cmci_init(void)
1335 {
1336         platform_driver_register(&s3cmci_driver_2410);
1337         platform_driver_register(&s3cmci_driver_2412);
1338         platform_driver_register(&s3cmci_driver_2440);
1339         return 0;
1340 }
1341
1342 static void __exit s3cmci_exit(void)
1343 {
1344         platform_driver_unregister(&s3cmci_driver_2410);
1345         platform_driver_unregister(&s3cmci_driver_2412);
1346         platform_driver_unregister(&s3cmci_driver_2440);
1347 }
1348
1349 module_init(s3cmci_init);
1350 module_exit(s3cmci_exit);
1351
1352 MODULE_DESCRIPTION("Samsung S3C MMC/SD Card Interface driver");
1353 MODULE_LICENSE("GPL v2");
1354 MODULE_AUTHOR("Thomas Kleffel <tk@maintech.de>");