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 <malloc.h>
  28 #include <mmc.h>
  29 #include <part.h>
  30 #include <i2c.h>
  31 #include <twl4030.h>
  32 #include <twl6030.h>
  33 #include <palmas.h>
  34 #include <asm/io.h>
  35 #include <asm/arch/mmc_host_def.h>
  36 #if !defined(CONFIG_SOC_KEYSTONE)
  37 #include <asm/gpio.h>
  38 #include <asm/arch/sys_proto.h>
  39 #endif
  40 #include <dm.h>
  41
  42 DECLARE_GLOBAL_DATA_PTR;
  43
  44 /* simplify defines to OMAP_HSMMC_USE_GPIO */
  45 #if (defined(CONFIG_OMAP_GPIO) && !defined(CONFIG_SPL_BUILD)) || \
  46         (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_GPIO_SUPPORT))
  47 #define OMAP_HSMMC_USE_GPIO
  48 #else
  49 #undef OMAP_HSMMC_USE_GPIO
  50 #endif
  51
  52 /* common definitions for all OMAPs */
  53 #define SYSCTL_SRC      (1 << 25)
  54 #define SYSCTL_SRD      (1 << 26)
  55
  56 struct omap_hsmmc_data {
  57         struct hsmmc *base_addr;
  58         struct mmc_config cfg;
  59 #ifdef OMAP_HSMMC_USE_GPIO
  60 #ifdef CONFIG_DM_MMC
  61         struct gpio_desc cd_gpio;       /* Change Detect GPIO */
  62         struct gpio_desc wp_gpio;       /* Write Protect GPIO */
  63         bool cd_inverted;
  64 #else
  65         int cd_gpio;
  66         int wp_gpio;
  67 #endif
  68 #endif
  69 };
  70
  71 /* If we fail after 1 second wait, something is really bad */
  72 #define MAX_RETRY_MS    1000
  73
  74 static int mmc_read_data(struct hsmmc *mmc_base, char *buf, unsigned int size);
  75 static int mmc_write_data(struct hsmmc *mmc_base, const char *buf,
  76                         unsigned int siz);
  77
  78 #if defined(OMAP_HSMMC_USE_GPIO) && !defined(CONFIG_DM_MMC)
  79 static int omap_mmc_setup_gpio_in(int gpio, const char *label)
  80 {
  81         int ret;
  82
  83 #ifndef CONFIG_DM_GPIO
  84         if (!gpio_is_valid(gpio))
  85                 return -1;
  86 #endif
  87         ret = gpio_request(gpio, label);
  88         if (ret)
  89                 return ret;
  90
  91         ret = gpio_direction_input(gpio);
  92         if (ret)
  93                 return ret;
  94
  95         return gpio;
  96 }
  97 #endif
  98
  99 static unsigned char mmc_board_init(struct mmc *mmc)
 100 {
 101 #if defined(CONFIG_OMAP34XX)
 102         t2_t *t2_base = (t2_t *)T2_BASE;
 103         struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
 104         u32 pbias_lite;
 105
 106         pbias_lite = readl(&t2_base->pbias_lite);
 107         pbias_lite &= ~(PBIASLITEPWRDNZ1 | PBIASLITEPWRDNZ0);
 108 #ifdef CONFIG_TARGET_OMAP3_CAIRO
 109         /* for cairo board, we need to set up 1.8 Volt bias level on MMC1 */
 110         pbias_lite &= ~PBIASLITEVMODE0;
 111 #endif
 112         writel(pbias_lite, &t2_base->pbias_lite);
 113
 114         writel(pbias_lite | PBIASLITEPWRDNZ1 |
 115                 PBIASSPEEDCTRL0 | PBIASLITEPWRDNZ0,
 116                 &t2_base->pbias_lite);
 117
 118         writel(readl(&t2_base->devconf0) | MMCSDIO1ADPCLKISEL,
 119                 &t2_base->devconf0);
 120
 121         writel(readl(&t2_base->devconf1) | MMCSDIO2ADPCLKISEL,
 122                 &t2_base->devconf1);
 123
 124         /* Change from default of 52MHz to 26MHz if necessary */
 125         if (!(mmc->cfg->host_caps & MMC_MODE_HS_52MHz))
 126                 writel(readl(&t2_base->ctl_prog_io1) & ~CTLPROGIO1SPEEDCTRL,
 127                         &t2_base->ctl_prog_io1);
 128
 129         writel(readl(&prcm_base->fclken1_core) |
 130                 EN_MMC1 | EN_MMC2 | EN_MMC3,
 131                 &prcm_base->fclken1_core);
 132
 133         writel(readl(&prcm_base->iclken1_core) |
 134                 EN_MMC1 | EN_MMC2 | EN_MMC3,
 135                 &prcm_base->iclken1_core);
 136 #endif
 137
 138 #if defined(CONFIG_OMAP54XX) || defined(CONFIG_OMAP44XX)
 139         /* PBIAS config needed for MMC1 only */
 140         if (mmc->block_dev.devnum == 0)
 141                 vmmc_pbias_config(LDO_VOLT_3V0);
 142 #endif
 143
 144         return 0;
 145 }
 146
 147 void mmc_init_stream(struct hsmmc *mmc_base)
 148 {
 149         ulong start;
 150
 151         writel(readl(&mmc_base->con) | INIT_INITSTREAM, &mmc_base->con);
 152
 153         writel(MMC_CMD0, &mmc_base->cmd);
 154         start = get_timer(0);
 155         while (!(readl(&mmc_base->stat) & CC_MASK)) {
 156                 if (get_timer(0) - start > MAX_RETRY_MS) {
 157                         printf("%s: timedout waiting for cc!\n", __func__);
 158                         return;
 159                 }
 160         }
 161         writel(CC_MASK, &mmc_base->stat)
 162                 ;
 163         writel(MMC_CMD0, &mmc_base->cmd)
 164                 ;
 165         start = get_timer(0);
 166         while (!(readl(&mmc_base->stat) & CC_MASK)) {
 167                 if (get_timer(0) - start > MAX_RETRY_MS) {
 168                         printf("%s: timedout waiting for cc2!\n", __func__);
 169                         return;
 170                 }
 171         }
 172         writel(readl(&mmc_base->con) & ~INIT_INITSTREAM, &mmc_base->con);
 173 }
 174
 175 static int omap_hsmmc_init_setup(struct mmc *mmc)
 176 {
 177         struct hsmmc *mmc_base;
 178         unsigned int reg_val;
 179         unsigned int dsor;
 180         ulong start;
 181
 182         mmc_base = ((struct omap_hsmmc_data *)mmc->priv)->base_addr;
 183         mmc_board_init(mmc);
 184
 185         writel(readl(&mmc_base->sysconfig) | MMC_SOFTRESET,
 186                 &mmc_base->sysconfig);
 187         start = get_timer(0);
 188         while ((readl(&mmc_base->sysstatus) & RESETDONE) == 0) {
 189                 if (get_timer(0) - start > MAX_RETRY_MS) {
 190                         printf("%s: timedout waiting for cc2!\n", __func__);
 191                         return -ETIMEDOUT;
 192                 }
 193         }
 194         writel(readl(&mmc_base->sysctl) | SOFTRESETALL, &mmc_base->sysctl);
 195         start = get_timer(0);
 196         while ((readl(&mmc_base->sysctl) & SOFTRESETALL) != 0x0) {
 197                 if (get_timer(0) - start > MAX_RETRY_MS) {
 198                         printf("%s: timedout waiting for softresetall!\n",
 199                                 __func__);
 200                         return -ETIMEDOUT;
 201                 }
 202         }
 203         writel(DTW_1_BITMODE | SDBP_PWROFF | SDVS_3V0, &mmc_base->hctl);
 204         writel(readl(&mmc_base->capa) | VS30_3V0SUP | VS18_1V8SUP,
 205                 &mmc_base->capa);
 206
 207         reg_val = readl(&mmc_base->con) & RESERVED_MASK;
 208
 209         writel(CTPL_MMC_SD | reg_val | WPP_ACTIVEHIGH | CDP_ACTIVEHIGH |
 210                 MIT_CTO | DW8_1_4BITMODE | MODE_FUNC | STR_BLOCK |
 211                 HR_NOHOSTRESP | INIT_NOINIT | NOOPENDRAIN, &mmc_base->con);
 212
 213         dsor = 240;
 214         mmc_reg_out(&mmc_base->sysctl, (ICE_MASK | DTO_MASK | CEN_MASK),
 215                 (ICE_STOP | DTO_15THDTO | CEN_DISABLE));
 216         mmc_reg_out(&mmc_base->sysctl, ICE_MASK | CLKD_MASK,
 217                 (dsor << CLKD_OFFSET) | ICE_OSCILLATE);
 218         start = get_timer(0);
 219         while ((readl(&mmc_base->sysctl) & ICS_MASK) == ICS_NOTREADY) {
 220                 if (get_timer(0) - start > MAX_RETRY_MS) {
 221                         printf("%s: timedout waiting for ics!\n", __func__);
 222                         return -ETIMEDOUT;
 223                 }
 224         }
 225         writel(readl(&mmc_base->sysctl) | CEN_ENABLE, &mmc_base->sysctl);
 226
 227         writel(readl(&mmc_base->hctl) | SDBP_PWRON, &mmc_base->hctl);
 228
 229         writel(IE_BADA | IE_CERR | IE_DEB | IE_DCRC | IE_DTO | IE_CIE |
 230                 IE_CEB | IE_CCRC | IE_CTO | IE_BRR | IE_BWR | IE_TC | IE_CC,
 231                 &mmc_base->ie);
 232
 233         mmc_init_stream(mmc_base);
 234
 235         return 0;
 236 }
 237
 238 /*
 239  * MMC controller internal finite state machine reset
 240  *
 241  * Used to reset command or data internal state machines, using respectively
 242  * SRC or SRD bit of SYSCTL register
 243  */
 244 static void mmc_reset_controller_fsm(struct hsmmc *mmc_base, u32 bit)
 245 {
 246         ulong start;
 247
 248         mmc_reg_out(&mmc_base->sysctl, bit, bit);
 249
 250         /*
 251          * CMD(DAT) lines reset procedures are slightly different
 252          * for OMAP3 and OMAP4(AM335x,OMAP5,DRA7xx).
 253          * According to OMAP3 TRM:
 254          * Set SRC(SRD) bit in MMCHS_SYSCTL register to 0x1 and wait until it
 255          * returns to 0x0.
 256          * According to OMAP4(AM335x,OMAP5,DRA7xx) TRMs, CMD(DATA) lines reset
 257          * procedure steps must be as follows:
 258          * 1. Initiate CMD(DAT) line reset by writing 0x1 to SRC(SRD) bit in
 259          *    MMCHS_SYSCTL register (SD_SYSCTL for AM335x).
 260          * 2. Poll the SRC(SRD) bit until it is set to 0x1.
 261          * 3. Wait until the SRC (SRD) bit returns to 0x0
 262          *    (reset procedure is completed).
 263          */
 264 #if defined(CONFIG_OMAP44XX) || defined(CONFIG_OMAP54XX) || \
 265         defined(CONFIG_AM33XX) || defined(CONFIG_AM43XX)
 266         if (!(readl(&mmc_base->sysctl) & bit)) {
 267                 start = get_timer(0);
 268                 while (!(readl(&mmc_base->sysctl) & bit)) {
 269                         if (get_timer(0) - start > MAX_RETRY_MS)
 270                                 return;
 271                 }
 272         }
 273 #endif
 274         start = get_timer(0);
 275         while ((readl(&mmc_base->sysctl) & bit) != 0) {
 276                 if (get_timer(0) - start > MAX_RETRY_MS) {
 277                         printf("%s: timedout waiting for sysctl %x to clear\n",
 278                                 __func__, bit);
 279                         return;
 280                 }
 281         }
 282 }
 283
 284 static int omap_hsmmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
 285                         struct mmc_data *data)
 286 {
 287         struct hsmmc *mmc_base;
 288         unsigned int flags, mmc_stat;
 289         ulong start;
 290
 291         mmc_base = ((struct omap_hsmmc_data *)mmc->priv)->base_addr;
 292         start = get_timer(0);
 293         while ((readl(&mmc_base->pstate) & (DATI_MASK | CMDI_MASK)) != 0) {
 294                 if (get_timer(0) - start > MAX_RETRY_MS) {
 295                         printf("%s: timedout waiting on cmd inhibit to clear\n",
 296                                         __func__);
 297                         return -ETIMEDOUT;
 298                 }
 299         }
 300         writel(0xFFFFFFFF, &mmc_base->stat);
 301         start = get_timer(0);
 302         while (readl(&mmc_base->stat)) {
 303                 if (get_timer(0) - start > MAX_RETRY_MS) {
 304                         printf("%s: timedout waiting for STAT (%x) to clear\n",
 305                                 __func__, readl(&mmc_base->stat));
 306                         return -ETIMEDOUT;
 307                 }
 308         }
 309         /*
 310          * CMDREG
 311          * CMDIDX[13:8] : Command index
 312          * DATAPRNT[5]  : Data Present Select
 313          * ENCMDIDX[4]  : Command Index Check Enable
 314          * ENCMDCRC[3]  : Command CRC Check Enable
 315          * RSPTYP[1:0]
 316          *      00 = No Response
 317          *      01 = Length 136
 318          *      10 = Length 48
 319          *      11 = Length 48 Check busy after response
 320          */
 321         /* Delay added before checking the status of frq change
 322          * retry not supported by mmc.c(core file)
 323          */
 324         if (cmd->cmdidx == SD_CMD_APP_SEND_SCR)
 325                 udelay(50000); /* wait 50 ms */
 326
 327         if (!(cmd->resp_type & MMC_RSP_PRESENT))
 328                 flags = 0;
 329         else if (cmd->resp_type & MMC_RSP_136)
 330                 flags = RSP_TYPE_LGHT136 | CICE_NOCHECK;
 331         else if (cmd->resp_type & MMC_RSP_BUSY)
 332                 flags = RSP_TYPE_LGHT48B;
 333         else
 334                 flags = RSP_TYPE_LGHT48;
 335
 336         /* enable default flags */
 337         flags = flags | (CMD_TYPE_NORMAL | CICE_NOCHECK | CCCE_NOCHECK |
 338                         MSBS_SGLEBLK | ACEN_DISABLE | BCE_DISABLE | DE_DISABLE);
 339
 340         if (cmd->resp_type & MMC_RSP_CRC)
 341                 flags |= CCCE_CHECK;
 342         if (cmd->resp_type & MMC_RSP_OPCODE)
 343                 flags |= CICE_CHECK;
 344
 345         if (data) {
 346                 if ((cmd->cmdidx == MMC_CMD_READ_MULTIPLE_BLOCK) ||
 347                          (cmd->cmdidx == MMC_CMD_WRITE_MULTIPLE_BLOCK)) {
 348                         flags |= (MSBS_MULTIBLK | BCE_ENABLE);
 349                         data->blocksize = 512;
 350                         writel(data->blocksize | (data->blocks << 16),
 351                                                         &mmc_base->blk);
 352                 } else
 353                         writel(data->blocksize | NBLK_STPCNT, &mmc_base->blk);
 354
 355                 if (data->flags & MMC_DATA_READ)
 356                         flags |= (DP_DATA | DDIR_READ);
 357                 else
 358                         flags |= (DP_DATA | DDIR_WRITE);
 359         }
 360
 361         writel(cmd->cmdarg, &mmc_base->arg);
 362         udelay(20);             /* To fix "No status update" error on eMMC */
 363         writel((cmd->cmdidx << 24) | flags, &mmc_base->cmd);
 364
 365         start = get_timer(0);
 366         do {
 367                 mmc_stat = readl(&mmc_base->stat);
 368                 if (get_timer(0) - start > MAX_RETRY_MS) {
 369                         printf("%s : timeout: No status update\n", __func__);
 370                         return -ETIMEDOUT;
 371                 }
 372         } while (!mmc_stat);
 373
 374         if ((mmc_stat & IE_CTO) != 0) {
 375                 mmc_reset_controller_fsm(mmc_base, SYSCTL_SRC);
 376                 return -ETIMEDOUT;
 377         } else if ((mmc_stat & ERRI_MASK) != 0)
 378                 return -1;
 379
 380         if (mmc_stat & CC_MASK) {
 381                 writel(CC_MASK, &mmc_base->stat);
 382                 if (cmd->resp_type & MMC_RSP_PRESENT) {
 383                         if (cmd->resp_type & MMC_RSP_136) {
 384                                 /* response type 2 */
 385                                 cmd->response[3] = readl(&mmc_base->rsp10);
 386                                 cmd->response[2] = readl(&mmc_base->rsp32);
 387                                 cmd->response[1] = readl(&mmc_base->rsp54);
 388                                 cmd->response[0] = readl(&mmc_base->rsp76);
 389                         } else
 390                                 /* response types 1, 1b, 3, 4, 5, 6 */
 391                                 cmd->response[0] = readl(&mmc_base->rsp10);
 392                 }
 393         }
 394
 395         if (data && (data->flags & MMC_DATA_READ)) {
 396                 mmc_read_data(mmc_base, data->dest,
 397                                 data->blocksize * data->blocks);
 398         } else if (data && (data->flags & MMC_DATA_WRITE)) {
 399                 mmc_write_data(mmc_base, data->src,
 400                                 data->blocksize * data->blocks);
 401         }
 402         return 0;
 403 }
 404
 405 static int mmc_read_data(struct hsmmc *mmc_base, char *buf, unsigned int size)
 406 {
 407         unsigned int *output_buf = (unsigned int *)buf;
 408         unsigned int mmc_stat;
 409         unsigned int count;
 410
 411         /*
 412          * Start Polled Read
 413          */
 414         count = (size > MMCSD_SECTOR_SIZE) ? MMCSD_SECTOR_SIZE : size;
 415         count /= 4;
 416
 417         while (size) {
 418                 ulong start = get_timer(0);
 419                 do {
 420                         mmc_stat = readl(&mmc_base->stat);
 421                         if (get_timer(0) - start > MAX_RETRY_MS) {
 422                                 printf("%s: timedout waiting for status!\n",
 423                                                 __func__);
 424                                 return -ETIMEDOUT;
 425                         }
 426                 } while (mmc_stat == 0);
 427
 428                 if ((mmc_stat & (IE_DTO | IE_DCRC | IE_DEB)) != 0)
 429                         mmc_reset_controller_fsm(mmc_base, SYSCTL_SRD);
 430
 431                 if ((mmc_stat & ERRI_MASK) != 0)
 432                         return 1;
 433
 434                 if (mmc_stat & BRR_MASK) {
 435                         unsigned int k;
 436
 437                         writel(readl(&mmc_base->stat) | BRR_MASK,
 438                                 &mmc_base->stat);
 439                         for (k = 0; k < count; k++) {
 440                                 *output_buf = readl(&mmc_base->data);
 441                                 output_buf++;
 442                         }
 443                         size -= (count*4);
 444                 }
 445
 446                 if (mmc_stat & BWR_MASK)
 447                         writel(readl(&mmc_base->stat) | BWR_MASK,
 448                                 &mmc_base->stat);
 449
 450                 if (mmc_stat & TC_MASK) {
 451                         writel(readl(&mmc_base->stat) | TC_MASK,
 452                                 &mmc_base->stat);
 453                         break;
 454                 }
 455         }
 456         return 0;
 457 }
 458
 459 static int mmc_write_data(struct hsmmc *mmc_base, const char *buf,
 460                                 unsigned int size)
 461 {
 462         unsigned int *input_buf = (unsigned int *)buf;
 463         unsigned int mmc_stat;
 464         unsigned int count;
 465
 466         /*
 467          * Start Polled Write
 468          */
 469         count = (size > MMCSD_SECTOR_SIZE) ? MMCSD_SECTOR_SIZE : size;
 470         count /= 4;
 471
 472         while (size) {
 473                 ulong start = get_timer(0);
 474                 do {
 475                         mmc_stat = readl(&mmc_base->stat);
 476                         if (get_timer(0) - start > MAX_RETRY_MS) {
 477                                 printf("%s: timedout waiting for status!\n",
 478                                                 __func__);
 479                                 return -ETIMEDOUT;
 480                         }
 481                 } while (mmc_stat == 0);
 482
 483                 if ((mmc_stat & (IE_DTO | IE_DCRC | IE_DEB)) != 0)
 484                         mmc_reset_controller_fsm(mmc_base, SYSCTL_SRD);
 485
 486                 if ((mmc_stat & ERRI_MASK) != 0)
 487                         return 1;
 488
 489                 if (mmc_stat & BWR_MASK) {
 490                         unsigned int k;
 491
 492                         writel(readl(&mmc_base->stat) | BWR_MASK,
 493                                         &mmc_base->stat);
 494                         for (k = 0; k < count; k++) {
 495                                 writel(*input_buf, &mmc_base->data);
 496                                 input_buf++;
 497                         }
 498                         size -= (count*4);
 499                 }
 500
 501                 if (mmc_stat & BRR_MASK)
 502                         writel(readl(&mmc_base->stat) | BRR_MASK,
 503                                 &mmc_base->stat);
 504
 505                 if (mmc_stat & TC_MASK) {
 506                         writel(readl(&mmc_base->stat) | TC_MASK,
 507                                 &mmc_base->stat);
 508                         break;
 509                 }
 510         }
 511         return 0;
 512 }
 513
 514 static int omap_hsmmc_set_ios(struct mmc *mmc)
 515 {
 516         struct hsmmc *mmc_base;
 517         unsigned int dsor = 0;
 518         ulong start;
 519
 520         mmc_base = ((struct omap_hsmmc_data *)mmc->priv)->base_addr;
 521         /* configue bus width */
 522         switch (mmc->bus_width) {
 523         case 8:
 524                 writel(readl(&mmc_base->con) | DTW_8_BITMODE,
 525                         &mmc_base->con);
 526                 break;
 527
 528         case 4:
 529                 writel(readl(&mmc_base->con) & ~DTW_8_BITMODE,
 530                         &mmc_base->con);
 531                 writel(readl(&mmc_base->hctl) | DTW_4_BITMODE,
 532                         &mmc_base->hctl);
 533                 break;
 534
 535         case 1:
 536         default:
 537                 writel(readl(&mmc_base->con) & ~DTW_8_BITMODE,
 538                         &mmc_base->con);
 539                 writel(readl(&mmc_base->hctl) & ~DTW_4_BITMODE,
 540                         &mmc_base->hctl);
 541                 break;
 542         }
 543
 544         /* configure clock with 96Mhz system clock.
 545          */
 546         if (mmc->clock != 0) {
 547                 dsor = (MMC_CLOCK_REFERENCE * 1000000 / mmc->clock);
 548                 if ((MMC_CLOCK_REFERENCE * 1000000) / dsor > mmc->clock)
 549                         dsor++;
 550         }
 551
 552         mmc_reg_out(&mmc_base->sysctl, (ICE_MASK | DTO_MASK | CEN_MASK),
 553                                 (ICE_STOP | DTO_15THDTO | CEN_DISABLE));
 554
 555         mmc_reg_out(&mmc_base->sysctl, ICE_MASK | CLKD_MASK,
 556                                 (dsor << CLKD_OFFSET) | ICE_OSCILLATE);
 557
 558         start = get_timer(0);
 559         while ((readl(&mmc_base->sysctl) & ICS_MASK) == ICS_NOTREADY) {
 560                 if (get_timer(0) - start > MAX_RETRY_MS) {
 561                         printf("%s: timedout waiting for ics!\n", __func__);
 562                         return -ETIMEDOUT;
 563                 }
 564         }
 565         writel(readl(&mmc_base->sysctl) | CEN_ENABLE, &mmc_base->sysctl);
 566
 567         return 0;
 568 }
 569
 570 #ifdef OMAP_HSMMC_USE_GPIO
 571 #ifdef CONFIG_DM_MMC
 572 static int omap_hsmmc_getcd(struct mmc *mmc)
 573 {
 574         struct omap_hsmmc_data *priv = mmc->priv;
 575         int value;
 576
 577         value = dm_gpio_get_value(&priv->cd_gpio);
 578         /* if no CD return as 1 */
 579         if (value < 0)
 580                 return 1;
 581
 582         if (priv->cd_inverted)
 583                 return !value;
 584         return value;
 585 }
 586
 587 static int omap_hsmmc_getwp(struct mmc *mmc)
 588 {
 589         struct omap_hsmmc_data *priv = mmc->priv;
 590         int value;
 591
 592         value = dm_gpio_get_value(&priv->wp_gpio);
 593         /* if no WP return as 0 */
 594         if (value < 0)
 595                 return 0;
 596         return value;
 597 }
 598 #else
 599 static int omap_hsmmc_getcd(struct mmc *mmc)
 600 {
 601         struct omap_hsmmc_data *priv_data = mmc->priv;
 602         int cd_gpio;
 603
 604         /* if no CD return as 1 */
 605         cd_gpio = priv_data->cd_gpio;
 606         if (cd_gpio < 0)
 607                 return 1;
 608
 609         /* NOTE: assumes card detect signal is active-low */
 610         return !gpio_get_value(cd_gpio);
 611 }
 612
 613 static int omap_hsmmc_getwp(struct mmc *mmc)
 614 {
 615         struct omap_hsmmc_data *priv_data = mmc->priv;
 616         int wp_gpio;
 617
 618         /* if no WP return as 0 */
 619         wp_gpio = priv_data->wp_gpio;
 620         if (wp_gpio < 0)
 621                 return 0;
 622
 623         /* NOTE: assumes write protect signal is active-high */
 624         return gpio_get_value(wp_gpio);
 625 }
 626 #endif
 627 #endif
 628
 629 static const struct mmc_ops omap_hsmmc_ops = {
 630         .send_cmd       = omap_hsmmc_send_cmd,
 631         .set_ios        = omap_hsmmc_set_ios,
 632         .init           = omap_hsmmc_init_setup,
 633 #ifdef OMAP_HSMMC_USE_GPIO
 634         .getcd          = omap_hsmmc_getcd,
 635         .getwp          = omap_hsmmc_getwp,
 636 #endif
 637 };
 638
 639 #ifndef CONFIG_DM_MMC
 640 int omap_mmc_init(int dev_index, uint host_caps_mask, uint f_max, int cd_gpio,
 641                 int wp_gpio)
 642 {
 643         struct mmc *mmc;
 644         struct omap_hsmmc_data *priv_data;
 645         struct mmc_config *cfg;
 646         uint host_caps_val;
 647
 648         priv_data = malloc(sizeof(*priv_data));
 649         if (priv_data == NULL)
 650                 return -1;
 651
 652         host_caps_val = MMC_MODE_4BIT | MMC_MODE_HS_52MHz | MMC_MODE_HS;
 653
 654         switch (dev_index) {
 655         case 0:
 656                 priv_data->base_addr = (struct hsmmc *)OMAP_HSMMC1_BASE;
 657                 break;
 658 #ifdef OMAP_HSMMC2_BASE
 659         case 1:
 660                 priv_data->base_addr = (struct hsmmc *)OMAP_HSMMC2_BASE;
 661 #if (defined(CONFIG_OMAP44XX) || defined(CONFIG_OMAP54XX) || \
 662         defined(CONFIG_DRA7XX) || defined(CONFIG_AM33XX) || \
 663         defined(CONFIG_AM43XX) || defined(CONFIG_SOC_KEYSTONE)) && \
 664                 defined(CONFIG_HSMMC2_8BIT)
 665                 /* Enable 8-bit interface for eMMC on OMAP4/5 or DRA7XX */
 666                 host_caps_val |= MMC_MODE_8BIT;
 667 #endif
 668                 break;
 669 #endif
 670 #ifdef OMAP_HSMMC3_BASE
 671         case 2:
 672                 priv_data->base_addr = (struct hsmmc *)OMAP_HSMMC3_BASE;
 673 #if defined(CONFIG_DRA7XX) && defined(CONFIG_HSMMC3_8BIT)
 674                 /* Enable 8-bit interface for eMMC on DRA7XX */
 675                 host_caps_val |= MMC_MODE_8BIT;
 676 #endif
 677                 break;
 678 #endif
 679         default:
 680                 priv_data->base_addr = (struct hsmmc *)OMAP_HSMMC1_BASE;
 681                 return 1;
 682         }
 683 #ifdef OMAP_HSMMC_USE_GPIO
 684         /* on error gpio values are set to -1, which is what we want */
 685         priv_data->cd_gpio = omap_mmc_setup_gpio_in(cd_gpio, "mmc_cd");
 686         priv_data->wp_gpio = omap_mmc_setup_gpio_in(wp_gpio, "mmc_wp");
 687 #endif
 688
 689         cfg = &priv_data->cfg;
 690
 691         cfg->name = "OMAP SD/MMC";
 692         cfg->ops = &omap_hsmmc_ops;
 693
 694         cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
 695         cfg->host_caps = host_caps_val & ~host_caps_mask;
 696
 697         cfg->f_min = 400000;
 698
 699         if (f_max != 0)
 700                 cfg->f_max = f_max;
 701         else {
 702                 if (cfg->host_caps & MMC_MODE_HS) {
 703                         if (cfg->host_caps & MMC_MODE_HS_52MHz)
 704                                 cfg->f_max = 52000000;
 705                         else
 706                                 cfg->f_max = 26000000;
 707                 } else
 708                         cfg->f_max = 20000000;
 709         }
 710
 711         cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
 712
 713 #if defined(CONFIG_OMAP34XX)
 714         /*
 715          * Silicon revs 2.1 and older do not support multiblock transfers.
 716          */
 717         if ((get_cpu_family() == CPU_OMAP34XX) && (get_cpu_rev() <= CPU_3XX_ES21))
 718                 cfg->b_max = 1;
 719 #endif
 720         mmc = mmc_create(cfg, priv_data);
 721         if (mmc == NULL)
 722                 return -1;
 723
 724         return 0;
 725 }
 726 #else
 727 static int omap_hsmmc_ofdata_to_platdata(struct udevice *dev)
 728 {
 729         struct omap_hsmmc_data *priv = dev_get_priv(dev);
 730         const void *fdt = gd->fdt_blob;
 731         int node = dev_of_offset(dev);
 732         struct mmc_config *cfg;
 733         int val;
 734
 735         priv->base_addr = map_physmem(dev_get_addr(dev), sizeof(struct hsmmc *),
 736                                       MAP_NOCACHE);
 737         cfg = &priv->cfg;
 738
 739         cfg->host_caps = MMC_MODE_HS_52MHz | MMC_MODE_HS;
 740         val = fdtdec_get_int(fdt, node, "bus-width", -1);
 741         if (val < 0) {
 742                 printf("error: bus-width property missing\n");
 743                 return -ENOENT;
 744         }
 745
 746         switch (val) {
 747         case 0x8:
 748                 cfg->host_caps |= MMC_MODE_8BIT;
 749         case 0x4:
 750                 cfg->host_caps |= MMC_MODE_4BIT;
 751                 break;
 752         default:
 753                 printf("error: invalid bus-width property\n");
 754                 return -ENOENT;
 755         }
 756
 757         cfg->f_min = 400000;
 758         cfg->f_max = fdtdec_get_int(fdt, node, "max-frequency", 52000000);
 759         cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
 760         cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
 761
 762 #ifdef OMAP_HSMMC_USE_GPIO
 763         priv->cd_inverted = fdtdec_get_bool(fdt, node, "cd-inverted");
 764 #endif
 765
 766         return 0;
 767 }
 768
 769 static int omap_hsmmc_probe(struct udevice *dev)
 770 {
 771         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
 772         struct omap_hsmmc_data *priv = dev_get_priv(dev);
 773         struct mmc_config *cfg;
 774         struct mmc *mmc;
 775
 776         cfg = &priv->cfg;
 777         cfg->name = "OMAP SD/MMC";
 778         cfg->ops = &omap_hsmmc_ops;
 779
 780         mmc = mmc_create(cfg, priv);
 781         if (mmc == NULL)
 782                 return -1;
 783
 784 #ifdef OMAP_HSMMC_USE_GPIO
 785         gpio_request_by_name(dev, "cd-gpios", 0, &priv->cd_gpio, GPIOD_IS_IN);
 786         gpio_request_by_name(dev, "wp-gpios", 0, &priv->wp_gpio, GPIOD_IS_IN);
 787 #endif
 788
 789         mmc->dev = dev;
 790         upriv->mmc = mmc;
 791
 792         return 0;
 793 }
 794
 795 static const struct udevice_id omap_hsmmc_ids[] = {
 796         { .compatible = "ti,omap3-hsmmc" },
 797         { .compatible = "ti,omap4-hsmmc" },
 798         { .compatible = "ti,am33xx-hsmmc" },
 799         { }
 800 };
 801
 802 U_BOOT_DRIVER(omap_hsmmc) = {
 803         .name   = "omap_hsmmc",
 804         .id     = UCLASS_MMC,
 805         .of_match = omap_hsmmc_ids,
 806         .ofdata_to_platdata = omap_hsmmc_ofdata_to_platdata,
 807         .probe  = omap_hsmmc_probe,
 808         .priv_auto_alloc_size = sizeof(struct omap_hsmmc_data),
 809 };
 810 #endif