drivers/mmc/omap_hsmmc.c

   1 /*
   2  * (C) Copyright 2008
   3  * Texas Instruments, <www.ti.com>
   4  * Sukumar Ghorai <s-ghorai@ti.com>
   5  *
   6  * See file CREDITS for list of people who contributed to this
   7  * project.
   8  *
   9  * This program is free software; you can redistribute it and/or
  10  * modify it under the terms of the GNU General Public License as
  11  * published by the Free Software Foundation's version 2 of
  12  * the License.
  13  *
  14  * This program is distributed in the hope that it will be useful,
  15  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  16  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  17  * GNU General Public License for more details.
  18  *
  19  * You should have received a copy of the GNU General Public License
  20  * along with this program; if not, write to the Free Software
  21  * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
  22  * MA 02111-1307 USA
  23  */
  24
  25 #include <config.h>
  26 #include <common.h>
  27 #include <mmc.h>
  28 #include <part.h>
  29 #include <i2c.h>
  30 #include <twl4030.h>
  31 #include <twl6030.h>
  32 #include <palmas.h>
  33 #include <asm/gpio.h>
  34 #include <asm/io.h>
  35 #include <asm/arch/mmc_host_def.h>
  36 #include <asm/arch/sys_proto.h>
  37
  38 /* common definitions for all OMAPs */
  39 #define SYSCTL_SRC      (1 << 25)
  40 #define SYSCTL_SRD      (1 << 26)
  41
  42 struct omap_hsmmc_data {
  43         struct hsmmc *base_addr;
  44         int cd_gpio;
  45         int wp_gpio;
  46 };
  47
  48 /* If we fail after 1 second wait, something is really bad */
  49 #define MAX_RETRY_MS    1000
  50
  51 static int mmc_read_data(struct hsmmc *mmc_base, char *buf, unsigned int size);
  52 static int mmc_write_data(struct hsmmc *mmc_base, const char *buf,
  53                         unsigned int siz);
  54 static struct mmc hsmmc_dev[3];
  55 static struct omap_hsmmc_data hsmmc_dev_data[3];
  56
  57 #if (defined(CONFIG_OMAP_GPIO) && !defined(CONFIG_SPL_BUILD)) || \
  58         (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_GPIO_SUPPORT))
  59 static int omap_mmc_setup_gpio_in(int gpio, const char *label)
  60 {
  61         if (!gpio_is_valid(gpio))
  62                 return -1;
  63
  64         if (gpio_request(gpio, label) < 0)
  65                 return -1;
  66
  67         if (gpio_direction_input(gpio) < 0)
  68                 return -1;
  69
  70         return gpio;
  71 }
  72
  73 static int omap_mmc_getcd(struct mmc *mmc)
  74 {
  75         int cd_gpio = ((struct omap_hsmmc_data *)mmc->priv)->cd_gpio;
  76         return gpio_get_value(cd_gpio);
  77 }
  78
  79 static int omap_mmc_getwp(struct mmc *mmc)
  80 {
  81         int wp_gpio = ((struct omap_hsmmc_data *)mmc->priv)->wp_gpio;
  82         return gpio_get_value(wp_gpio);
  83 }
  84 #else
  85 static inline int omap_mmc_setup_gpio_in(int gpio, const char *label)
  86 {
  87         return -1;
  88 }
  89
  90 #define omap_mmc_getcd NULL
  91 #define omap_mmc_getwp NULL
  92 #endif
  93
  94 #if defined(CONFIG_OMAP44XX) && defined(CONFIG_TWL6030_POWER)
  95 static void omap4_vmmc_pbias_config(struct mmc *mmc)
  96 {
  97         u32 value = 0;
  98
  99         value = readl((*ctrl)->control_pbiaslite);
 100         value &= ~(MMC1_PBIASLITE_PWRDNZ | MMC1_PWRDNZ);
 101         writel(value, (*ctrl)->control_pbiaslite);
 102         /* set VMMC to 3V */
 103         twl6030_power_mmc_init();
 104         value = readl((*ctrl)->control_pbiaslite);
 105         value |= MMC1_PBIASLITE_VMODE | MMC1_PBIASLITE_PWRDNZ | MMC1_PWRDNZ;
 106         writel(value, (*ctrl)->control_pbiaslite);
 107 }
 108 #endif
 109
 110 #if defined(CONFIG_OMAP54XX) && defined(CONFIG_PALMAS_POWER)
 111 static void omap5_pbias_config(struct mmc *mmc)
 112 {
 113         u32 value = 0;
 114
 115         value = readl((*ctrl)->control_pbias);
 116         value &= ~SDCARD_PWRDNZ;
 117         writel(value, (*ctrl)->control_pbias);
 118         udelay(10); /* wait 10 us */
 119         value &= ~SDCARD_BIAS_PWRDNZ;
 120         writel(value, (*ctrl)->control_pbias);
 121
 122         palmas_mmc1_poweron_ldo();
 123
 124         value = readl((*ctrl)->control_pbias);
 125         value |= SDCARD_BIAS_PWRDNZ;
 126         writel(value, (*ctrl)->control_pbias);
 127         udelay(150); /* wait 150 us */
 128         value |= SDCARD_PWRDNZ;
 129         writel(value, (*ctrl)->control_pbias);
 130         udelay(150); /* wait 150 us */
 131 }
 132 #endif
 133
 134 unsigned char mmc_board_init(struct mmc *mmc)
 135 {
 136 #if defined(CONFIG_OMAP34XX)
 137         t2_t *t2_base = (t2_t *)T2_BASE;
 138         struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
 139         u32 pbias_lite;
 140
 141         pbias_lite = readl(&t2_base->pbias_lite);
 142         pbias_lite &= ~(PBIASLITEPWRDNZ1 | PBIASLITEPWRDNZ0);
 143         writel(pbias_lite, &t2_base->pbias_lite);
 144 #endif
 145 #if defined(CONFIG_TWL4030_POWER)
 146         twl4030_power_mmc_init();
 147         mdelay(100);    /* ramp-up delay from Linux code */
 148 #endif
 149 #if defined(CONFIG_OMAP34XX)
 150         writel(pbias_lite | PBIASLITEPWRDNZ1 |
 151                 PBIASSPEEDCTRL0 | PBIASLITEPWRDNZ0,
 152                 &t2_base->pbias_lite);
 153
 154         writel(readl(&t2_base->devconf0) | MMCSDIO1ADPCLKISEL,
 155                 &t2_base->devconf0);
 156
 157         writel(readl(&t2_base->devconf1) | MMCSDIO2ADPCLKISEL,
 158                 &t2_base->devconf1);
 159
 160         /* Change from default of 52MHz to 26MHz if necessary */
 161         if (!(mmc->host_caps & MMC_MODE_HS_52MHz))
 162                 writel(readl(&t2_base->ctl_prog_io1) & ~CTLPROGIO1SPEEDCTRL,
 163                         &t2_base->ctl_prog_io1);
 164
 165         writel(readl(&prcm_base->fclken1_core) |
 166                 EN_MMC1 | EN_MMC2 | EN_MMC3,
 167                 &prcm_base->fclken1_core);
 168
 169         writel(readl(&prcm_base->iclken1_core) |
 170                 EN_MMC1 | EN_MMC2 | EN_MMC3,
 171                 &prcm_base->iclken1_core);
 172 #endif
 173
 174 #if defined(CONFIG_OMAP44XX) && defined(CONFIG_TWL6030_POWER)
 175         /* PBIAS config needed for MMC1 only */
 176         if (mmc->block_dev.dev == 0)
 177                 omap4_vmmc_pbias_config(mmc);
 178 #endif
 179 #if defined(CONFIG_OMAP54XX) && defined(CONFIG_PALMAS_POWER)
 180         if (mmc->block_dev.dev == 0)
 181                 omap5_pbias_config(mmc);
 182 #endif
 183
 184         return 0;
 185 }
 186
 187 void mmc_init_stream(struct hsmmc *mmc_base)
 188 {
 189         ulong start;
 190
 191         writel(readl(&mmc_base->con) | INIT_INITSTREAM, &mmc_base->con);
 192
 193         writel(MMC_CMD0, &mmc_base->cmd);
 194         start = get_timer(0);
 195         while (!(readl(&mmc_base->stat) & CC_MASK)) {
 196                 if (get_timer(0) - start > MAX_RETRY_MS) {
 197                         printf("%s: timedout waiting for cc!\n", __func__);
 198                         return;
 199                 }
 200         }
 201         writel(CC_MASK, &mmc_base->stat)
 202                 ;
 203         writel(MMC_CMD0, &mmc_base->cmd)
 204                 ;
 205         start = get_timer(0);
 206         while (!(readl(&mmc_base->stat) & CC_MASK)) {
 207                 if (get_timer(0) - start > MAX_RETRY_MS) {
 208                         printf("%s: timedout waiting for cc2!\n", __func__);
 209                         return;
 210                 }
 211         }
 212         writel(readl(&mmc_base->con) & ~INIT_INITSTREAM, &mmc_base->con);
 213 }
 214
 215
 216 static int mmc_init_setup(struct mmc *mmc)
 217 {
 218         struct hsmmc *mmc_base;
 219         unsigned int reg_val;
 220         unsigned int dsor;
 221         ulong start;
 222
 223         mmc_base = ((struct omap_hsmmc_data *)mmc->priv)->base_addr;
 224         mmc_board_init(mmc);
 225
 226         writel(readl(&mmc_base->sysconfig) | MMC_SOFTRESET,
 227                 &mmc_base->sysconfig);
 228         start = get_timer(0);
 229         while ((readl(&mmc_base->sysstatus) & RESETDONE) == 0) {
 230                 if (get_timer(0) - start > MAX_RETRY_MS) {
 231                         printf("%s: timedout waiting for cc2!\n", __func__);
 232                         return TIMEOUT;
 233                 }
 234         }
 235         writel(readl(&mmc_base->sysctl) | SOFTRESETALL, &mmc_base->sysctl);
 236         start = get_timer(0);
 237         while ((readl(&mmc_base->sysctl) & SOFTRESETALL) != 0x0) {
 238                 if (get_timer(0) - start > MAX_RETRY_MS) {
 239                         printf("%s: timedout waiting for softresetall!\n",
 240                                 __func__);
 241                         return TIMEOUT;
 242                 }
 243         }
 244         writel(DTW_1_BITMODE | SDBP_PWROFF | SDVS_3V0, &mmc_base->hctl);
 245         writel(readl(&mmc_base->capa) | VS30_3V0SUP | VS18_1V8SUP,
 246                 &mmc_base->capa);
 247
 248         reg_val = readl(&mmc_base->con) & RESERVED_MASK;
 249
 250         writel(CTPL_MMC_SD | reg_val | WPP_ACTIVEHIGH | CDP_ACTIVEHIGH |
 251                 MIT_CTO | DW8_1_4BITMODE | MODE_FUNC | STR_BLOCK |
 252                 HR_NOHOSTRESP | INIT_NOINIT | NOOPENDRAIN, &mmc_base->con);
 253
 254         dsor = 240;
 255         mmc_reg_out(&mmc_base->sysctl, (ICE_MASK | DTO_MASK | CEN_MASK),
 256                 (ICE_STOP | DTO_15THDTO | CEN_DISABLE));
 257         mmc_reg_out(&mmc_base->sysctl, ICE_MASK | CLKD_MASK,
 258                 (dsor << CLKD_OFFSET) | ICE_OSCILLATE);
 259         start = get_timer(0);
 260         while ((readl(&mmc_base->sysctl) & ICS_MASK) == ICS_NOTREADY) {
 261                 if (get_timer(0) - start > MAX_RETRY_MS) {
 262                         printf("%s: timedout waiting for ics!\n", __func__);
 263                         return TIMEOUT;
 264                 }
 265         }
 266         writel(readl(&mmc_base->sysctl) | CEN_ENABLE, &mmc_base->sysctl);
 267
 268         writel(readl(&mmc_base->hctl) | SDBP_PWRON, &mmc_base->hctl);
 269
 270         writel(IE_BADA | IE_CERR | IE_DEB | IE_DCRC | IE_DTO | IE_CIE |
 271                 IE_CEB | IE_CCRC | IE_CTO | IE_BRR | IE_BWR | IE_TC | IE_CC,
 272                 &mmc_base->ie);
 273
 274         mmc_init_stream(mmc_base);
 275
 276         return 0;
 277 }
 278
 279 /*
 280  * MMC controller internal finite state machine reset
 281  *
 282  * Used to reset command or data internal state machines, using respectively
 283  * SRC or SRD bit of SYSCTL register
 284  */
 285 static void mmc_reset_controller_fsm(struct hsmmc *mmc_base, u32 bit)
 286 {
 287         ulong start;
 288
 289         mmc_reg_out(&mmc_base->sysctl, bit, bit);
 290
 291         start = get_timer(0);
 292         while ((readl(&mmc_base->sysctl) & bit) != 0) {
 293                 if (get_timer(0) - start > MAX_RETRY_MS) {
 294                         printf("%s: timedout waiting for sysctl %x to clear\n",
 295                                 __func__, bit);
 296                         return;
 297                 }
 298         }
 299 }
 300
 301 static int mmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
 302                         struct mmc_data *data)
 303 {
 304         struct hsmmc *mmc_base;
 305         unsigned int flags, mmc_stat;
 306         ulong start;
 307
 308         mmc_base = ((struct omap_hsmmc_data *)mmc->priv)->base_addr;
 309         start = get_timer(0);
 310         while ((readl(&mmc_base->pstate) & (DATI_MASK | CMDI_MASK)) != 0) {
 311                 if (get_timer(0) - start > MAX_RETRY_MS) {
 312                         printf("%s: timedout waiting on cmd inhibit to clear\n",
 313                                         __func__);
 314                         return TIMEOUT;
 315                 }
 316         }
 317         writel(0xFFFFFFFF, &mmc_base->stat);
 318         start = get_timer(0);
 319         while (readl(&mmc_base->stat)) {
 320                 if (get_timer(0) - start > MAX_RETRY_MS) {
 321                         printf("%s: timedout waiting for STAT (%x) to clear\n",
 322                                 __func__, readl(&mmc_base->stat));
 323                         return TIMEOUT;
 324                 }
 325         }
 326         /*
 327          * CMDREG
 328          * CMDIDX[13:8] : Command index
 329          * DATAPRNT[5]  : Data Present Select
 330          * ENCMDIDX[4]  : Command Index Check Enable
 331          * ENCMDCRC[3]  : Command CRC Check Enable
 332          * RSPTYP[1:0]
 333          *      00 = No Response
 334          *      01 = Length 136
 335          *      10 = Length 48
 336          *      11 = Length 48 Check busy after response
 337          */
 338         /* Delay added before checking the status of frq change
 339          * retry not supported by mmc.c(core file)
 340          */
 341         if (cmd->cmdidx == SD_CMD_APP_SEND_SCR)
 342                 udelay(50000); /* wait 50 ms */
 343
 344         if (!(cmd->resp_type & MMC_RSP_PRESENT))
 345                 flags = 0;
 346         else if (cmd->resp_type & MMC_RSP_136)
 347                 flags = RSP_TYPE_LGHT136 | CICE_NOCHECK;
 348         else if (cmd->resp_type & MMC_RSP_BUSY)
 349                 flags = RSP_TYPE_LGHT48B;
 350         else
 351                 flags = RSP_TYPE_LGHT48;
 352
 353         /* enable default flags */
 354         flags = flags | (CMD_TYPE_NORMAL | CICE_NOCHECK | CCCE_NOCHECK |
 355                         MSBS_SGLEBLK | ACEN_DISABLE | BCE_DISABLE | DE_DISABLE);
 356
 357         if (cmd->resp_type & MMC_RSP_CRC)
 358                 flags |= CCCE_CHECK;
 359         if (cmd->resp_type & MMC_RSP_OPCODE)
 360                 flags |= CICE_CHECK;
 361
 362         if (data) {
 363                 if ((cmd->cmdidx == MMC_CMD_READ_MULTIPLE_BLOCK) ||
 364                          (cmd->cmdidx == MMC_CMD_WRITE_MULTIPLE_BLOCK)) {
 365                         flags |= (MSBS_MULTIBLK | BCE_ENABLE);
 366                         data->blocksize = 512;
 367                         writel(data->blocksize | (data->blocks << 16),
 368                                                         &mmc_base->blk);
 369                 } else
 370                         writel(data->blocksize | NBLK_STPCNT, &mmc_base->blk);
 371
 372                 if (data->flags & MMC_DATA_READ)
 373                         flags |= (DP_DATA | DDIR_READ);
 374                 else
 375                         flags |= (DP_DATA | DDIR_WRITE);
 376         }
 377
 378         writel(cmd->cmdarg, &mmc_base->arg);
 379         writel((cmd->cmdidx << 24) | flags, &mmc_base->cmd);
 380
 381         start = get_timer(0);
 382         do {
 383                 mmc_stat = readl(&mmc_base->stat);
 384                 if (get_timer(0) - start > MAX_RETRY_MS) {
 385                         printf("%s : timeout: No status update\n", __func__);
 386                         return TIMEOUT;
 387                 }
 388         } while (!mmc_stat);
 389
 390         if ((mmc_stat & IE_CTO) != 0) {
 391                 mmc_reset_controller_fsm(mmc_base, SYSCTL_SRC);
 392                 return TIMEOUT;
 393         } else if ((mmc_stat & ERRI_MASK) != 0)
 394                 return -1;
 395
 396         if (mmc_stat & CC_MASK) {
 397                 writel(CC_MASK, &mmc_base->stat);
 398                 if (cmd->resp_type & MMC_RSP_PRESENT) {
 399                         if (cmd->resp_type & MMC_RSP_136) {
 400                                 /* response type 2 */
 401                                 cmd->response[3] = readl(&mmc_base->rsp10);
 402                                 cmd->response[2] = readl(&mmc_base->rsp32);
 403                                 cmd->response[1] = readl(&mmc_base->rsp54);
 404                                 cmd->response[0] = readl(&mmc_base->rsp76);
 405                         } else
 406                                 /* response types 1, 1b, 3, 4, 5, 6 */
 407                                 cmd->response[0] = readl(&mmc_base->rsp10);
 408                 }
 409         }
 410
 411         if (data && (data->flags & MMC_DATA_READ)) {
 412                 mmc_read_data(mmc_base, data->dest,
 413                                 data->blocksize * data->blocks);
 414         } else if (data && (data->flags & MMC_DATA_WRITE)) {
 415                 mmc_write_data(mmc_base, data->src,
 416                                 data->blocksize * data->blocks);
 417         }
 418         return 0;
 419 }
 420
 421 static int mmc_read_data(struct hsmmc *mmc_base, char *buf, unsigned int size)
 422 {
 423         unsigned int *output_buf = (unsigned int *)buf;
 424         unsigned int mmc_stat;
 425         unsigned int count;
 426
 427         /*
 428          * Start Polled Read
 429          */
 430         count = (size > MMCSD_SECTOR_SIZE) ? MMCSD_SECTOR_SIZE : size;
 431         count /= 4;
 432
 433         while (size) {
 434                 ulong start = get_timer(0);
 435                 do {
 436                         mmc_stat = readl(&mmc_base->stat);
 437                         if (get_timer(0) - start > MAX_RETRY_MS) {
 438                                 printf("%s: timedout waiting for status!\n",
 439                                                 __func__);
 440                                 return TIMEOUT;
 441                         }
 442                 } while (mmc_stat == 0);
 443
 444                 if ((mmc_stat & (IE_DTO | IE_DCRC | IE_DEB)) != 0)
 445                         mmc_reset_controller_fsm(mmc_base, SYSCTL_SRD);
 446
 447                 if ((mmc_stat & ERRI_MASK) != 0)
 448                         return 1;
 449
 450                 if (mmc_stat & BRR_MASK) {
 451                         unsigned int k;
 452
 453                         writel(readl(&mmc_base->stat) | BRR_MASK,
 454                                 &mmc_base->stat);
 455                         for (k = 0; k < count; k++) {
 456                                 *output_buf = readl(&mmc_base->data);
 457                                 output_buf++;
 458                         }
 459                         size -= (count*4);
 460                 }
 461
 462                 if (mmc_stat & BWR_MASK)
 463                         writel(readl(&mmc_base->stat) | BWR_MASK,
 464                                 &mmc_base->stat);
 465
 466                 if (mmc_stat & TC_MASK) {
 467                         writel(readl(&mmc_base->stat) | TC_MASK,
 468                                 &mmc_base->stat);
 469                         break;
 470                 }
 471         }
 472         return 0;
 473 }
 474
 475 static int mmc_write_data(struct hsmmc *mmc_base, const char *buf,
 476                                 unsigned int size)
 477 {
 478         unsigned int *input_buf = (unsigned int *)buf;
 479         unsigned int mmc_stat;
 480         unsigned int count;
 481
 482         /*
 483          * Start Polled Read
 484          */
 485         count = (size > MMCSD_SECTOR_SIZE) ? MMCSD_SECTOR_SIZE : size;
 486         count /= 4;
 487
 488         while (size) {
 489                 ulong start = get_timer(0);
 490                 do {
 491                         mmc_stat = readl(&mmc_base->stat);
 492                         if (get_timer(0) - start > MAX_RETRY_MS) {
 493                                 printf("%s: timedout waiting for status!\n",
 494                                                 __func__);
 495                                 return TIMEOUT;
 496                         }
 497                 } while (mmc_stat == 0);
 498
 499                 if ((mmc_stat & (IE_DTO | IE_DCRC | IE_DEB)) != 0)
 500                         mmc_reset_controller_fsm(mmc_base, SYSCTL_SRD);
 501
 502                 if ((mmc_stat & ERRI_MASK) != 0)
 503                         return 1;
 504
 505                 if (mmc_stat & BWR_MASK) {
 506                         unsigned int k;
 507
 508                         writel(readl(&mmc_base->stat) | BWR_MASK,
 509                                         &mmc_base->stat);
 510                         for (k = 0; k < count; k++) {
 511                                 writel(*input_buf, &mmc_base->data);
 512                                 input_buf++;
 513                         }
 514                         size -= (count*4);
 515                 }
 516
 517                 if (mmc_stat & BRR_MASK)
 518                         writel(readl(&mmc_base->stat) | BRR_MASK,
 519                                 &mmc_base->stat);
 520
 521                 if (mmc_stat & TC_MASK) {
 522                         writel(readl(&mmc_base->stat) | TC_MASK,
 523                                 &mmc_base->stat);
 524                         break;
 525                 }
 526         }
 527         return 0;
 528 }
 529
 530 static void mmc_set_ios(struct mmc *mmc)
 531 {
 532         struct hsmmc *mmc_base;
 533         unsigned int dsor = 0;
 534         ulong start;
 535
 536         mmc_base = ((struct omap_hsmmc_data *)mmc->priv)->base_addr;
 537         /* configue bus width */
 538         switch (mmc->bus_width) {
 539         case 8:
 540                 writel(readl(&mmc_base->con) | DTW_8_BITMODE,
 541                         &mmc_base->con);
 542                 break;
 543
 544         case 4:
 545                 writel(readl(&mmc_base->con) & ~DTW_8_BITMODE,
 546                         &mmc_base->con);
 547                 writel(readl(&mmc_base->hctl) | DTW_4_BITMODE,
 548                         &mmc_base->hctl);
 549                 break;
 550
 551         case 1:
 552         default:
 553                 writel(readl(&mmc_base->con) & ~DTW_8_BITMODE,
 554                         &mmc_base->con);
 555                 writel(readl(&mmc_base->hctl) & ~DTW_4_BITMODE,
 556                         &mmc_base->hctl);
 557                 break;
 558         }
 559
 560         /* configure clock with 96Mhz system clock.
 561          */
 562         if (mmc->clock != 0) {
 563                 dsor = (MMC_CLOCK_REFERENCE * 1000000 / mmc->clock);
 564                 if ((MMC_CLOCK_REFERENCE * 1000000) / dsor > mmc->clock)
 565                         dsor++;
 566         }
 567
 568         mmc_reg_out(&mmc_base->sysctl, (ICE_MASK | DTO_MASK | CEN_MASK),
 569                                 (ICE_STOP | DTO_15THDTO | CEN_DISABLE));
 570
 571         mmc_reg_out(&mmc_base->sysctl, ICE_MASK | CLKD_MASK,
 572                                 (dsor << CLKD_OFFSET) | ICE_OSCILLATE);
 573
 574         start = get_timer(0);
 575         while ((readl(&mmc_base->sysctl) & ICS_MASK) == ICS_NOTREADY) {
 576                 if (get_timer(0) - start > MAX_RETRY_MS) {
 577                         printf("%s: timedout waiting for ics!\n", __func__);
 578                         return;
 579                 }
 580         }
 581         writel(readl(&mmc_base->sysctl) | CEN_ENABLE, &mmc_base->sysctl);
 582 }
 583
 584 int omap_mmc_init(int dev_index, uint host_caps_mask, uint f_max, int cd_gpio,
 585                 int wp_gpio)
 586 {
 587         struct mmc *mmc = &hsmmc_dev[dev_index];
 588         struct omap_hsmmc_data *priv_data = &hsmmc_dev_data[dev_index];
 589
 590         sprintf(mmc->name, "OMAP SD/MMC");
 591         mmc->send_cmd = mmc_send_cmd;
 592         mmc->set_ios = mmc_set_ios;
 593         mmc->init = mmc_init_setup;
 594         mmc->priv = priv_data;
 595
 596         switch (dev_index) {
 597         case 0:
 598                 priv_data->base_addr = (struct hsmmc *)OMAP_HSMMC1_BASE;
 599                 break;
 600 #ifdef OMAP_HSMMC2_BASE
 601         case 1:
 602                 priv_data->base_addr = (struct hsmmc *)OMAP_HSMMC2_BASE;
 603                 break;
 604 #endif
 605 #ifdef OMAP_HSMMC3_BASE
 606         case 2:
 607                 priv_data->base_addr = (struct hsmmc *)OMAP_HSMMC3_BASE;
 608                 break;
 609 #endif
 610         default:
 611                 priv_data->base_addr = (struct hsmmc *)OMAP_HSMMC1_BASE;
 612                 return 1;
 613         }
 614         priv_data->cd_gpio = omap_mmc_setup_gpio_in(cd_gpio, "mmc_cd");
 615         if (priv_data->cd_gpio != -1)
 616                 mmc->getcd = omap_mmc_getcd;
 617
 618         priv_data->wp_gpio = omap_mmc_setup_gpio_in(wp_gpio, "mmc_wp");
 619         if (priv_data->wp_gpio != -1)
 620                 mmc->getwp = omap_mmc_getwp;
 621
 622         mmc->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
 623         mmc->host_caps = (MMC_MODE_4BIT | MMC_MODE_HS_52MHz | MMC_MODE_HS |
 624                                 MMC_MODE_HC) & ~host_caps_mask;
 625
 626         mmc->f_min = 400000;
 627
 628         if (f_max != 0)
 629                 mmc->f_max = f_max;
 630         else {
 631                 if (mmc->host_caps & MMC_MODE_HS) {
 632                         if (mmc->host_caps & MMC_MODE_HS_52MHz)
 633                                 mmc->f_max = 52000000;
 634                         else
 635                                 mmc->f_max = 26000000;
 636                 } else
 637                         mmc->f_max = 20000000;
 638         }
 639
 640         mmc->b_max = 0;
 641
 642 #if defined(CONFIG_OMAP34XX)
 643         /*
 644          * Silicon revs 2.1 and older do not support multiblock transfers.
 645          */
 646         if ((get_cpu_family() == CPU_OMAP34XX) && (get_cpu_rev() <= CPU_3XX_ES21))
 647                 mmc->b_max = 1;
 648 #endif
 649
 650         mmc_register(mmc);
 651
 652         return 0;
 653 }