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 #ifdef CONFIG_MMC_OMAP36XX_PINS
  41 #include <asm/arch/mux.h>
  42 #endif
  43 #include <dm.h>
  44
  45 DECLARE_GLOBAL_DATA_PTR;
  46
  47 /* simplify defines to OMAP_HSMMC_USE_GPIO */
  48 #if (defined(CONFIG_OMAP_GPIO) && !defined(CONFIG_SPL_BUILD)) || \
  49         (defined(CONFIG_SPL_BUILD) && defined(CONFIG_SPL_GPIO_SUPPORT))
  50 #define OMAP_HSMMC_USE_GPIO
  51 #else
  52 #undef OMAP_HSMMC_USE_GPIO
  53 #endif
  54
  55 /* common definitions for all OMAPs */
  56 #define SYSCTL_SRC      (1 << 25)
  57 #define SYSCTL_SRD      (1 << 26)
  58
  59 struct omap2_mmc_platform_config {
  60         u32 reg_offset;
  61 };
  62
  63 struct omap_hsmmc_data {
  64         struct hsmmc *base_addr;
  65 #ifndef CONFIG_DM_MMC
  66         struct mmc_config cfg;
  67 #endif
  68 #ifdef OMAP_HSMMC_USE_GPIO
  69 #ifdef CONFIG_DM_MMC
  70         struct gpio_desc cd_gpio;       /* Change Detect GPIO */
  71         struct gpio_desc wp_gpio;       /* Write Protect GPIO */
  72         bool cd_inverted;
  73 #else
  74         int cd_gpio;
  75         int wp_gpio;
  76 #endif
  77 #endif
  78 };
  79
  80 /* If we fail after 1 second wait, something is really bad */
  81 #define MAX_RETRY_MS    1000
  82
  83 static int mmc_read_data(struct hsmmc *mmc_base, char *buf, unsigned int size);
  84 static int mmc_write_data(struct hsmmc *mmc_base, const char *buf,
  85                         unsigned int siz);
  86
  87 static inline struct omap_hsmmc_data *omap_hsmmc_get_data(struct mmc *mmc)
  88 {
  89 #ifdef CONFIG_DM_MMC
  90         return dev_get_priv(mmc->dev);
  91 #else
  92         return (struct omap_hsmmc_data *)mmc->priv;
  93 #endif
  94 }
  95 static inline struct mmc_config *omap_hsmmc_get_cfg(struct mmc *mmc)
  96 {
  97 #ifdef CONFIG_DM_MMC
  98         struct omap_hsmmc_plat *plat = dev_get_platdata(mmc->dev);
  99         return &plat->cfg;
 100 #else
 101         return &((struct omap_hsmmc_data *)mmc->priv)->cfg;
 102 #endif
 103 }
 104
 105  #if defined(OMAP_HSMMC_USE_GPIO) && !defined(CONFIG_DM_MMC)
 106 static int omap_mmc_setup_gpio_in(int gpio, const char *label)
 107 {
 108         int ret;
 109
 110 #ifndef CONFIG_DM_GPIO
 111         if (!gpio_is_valid(gpio))
 112                 return -1;
 113 #endif
 114         ret = gpio_request(gpio, label);
 115         if (ret)
 116                 return ret;
 117
 118         ret = gpio_direction_input(gpio);
 119         if (ret)
 120                 return ret;
 121
 122         return gpio;
 123 }
 124 #endif
 125
 126 static unsigned char mmc_board_init(struct mmc *mmc)
 127 {
 128 #if defined(CONFIG_OMAP34XX)
 129         struct mmc_config *cfg = omap_hsmmc_get_cfg(mmc);
 130         t2_t *t2_base = (t2_t *)T2_BASE;
 131         struct prcm *prcm_base = (struct prcm *)PRCM_BASE;
 132         u32 pbias_lite;
 133 #ifdef CONFIG_MMC_OMAP36XX_PINS
 134         u32 wkup_ctrl = readl(OMAP34XX_CTRL_WKUP_CTRL);
 135 #endif
 136
 137         pbias_lite = readl(&t2_base->pbias_lite);
 138         pbias_lite &= ~(PBIASLITEPWRDNZ1 | PBIASLITEPWRDNZ0);
 139 #ifdef CONFIG_TARGET_OMAP3_CAIRO
 140         /* for cairo board, we need to set up 1.8 Volt bias level on MMC1 */
 141         pbias_lite &= ~PBIASLITEVMODE0;
 142 #endif
 143 #ifdef CONFIG_MMC_OMAP36XX_PINS
 144         if (get_cpu_family() == CPU_OMAP36XX) {
 145                 /* Disable extended drain IO before changing PBIAS */
 146                 wkup_ctrl &= ~OMAP34XX_CTRL_WKUP_CTRL_GPIO_IO_PWRDNZ;
 147                 writel(wkup_ctrl, OMAP34XX_CTRL_WKUP_CTRL);
 148         }
 149 #endif
 150         writel(pbias_lite, &t2_base->pbias_lite);
 151
 152         writel(pbias_lite | PBIASLITEPWRDNZ1 |
 153                 PBIASSPEEDCTRL0 | PBIASLITEPWRDNZ0,
 154                 &t2_base->pbias_lite);
 155
 156 #ifdef CONFIG_MMC_OMAP36XX_PINS
 157         if (get_cpu_family() == CPU_OMAP36XX)
 158                 /* Enable extended drain IO after changing PBIAS */
 159                 writel(wkup_ctrl |
 160                                 OMAP34XX_CTRL_WKUP_CTRL_GPIO_IO_PWRDNZ,
 161                                 OMAP34XX_CTRL_WKUP_CTRL);
 162 #endif
 163         writel(readl(&t2_base->devconf0) | MMCSDIO1ADPCLKISEL,
 164                 &t2_base->devconf0);
 165
 166         writel(readl(&t2_base->devconf1) | MMCSDIO2ADPCLKISEL,
 167                 &t2_base->devconf1);
 168
 169         /* Change from default of 52MHz to 26MHz if necessary */
 170         if (!(cfg->host_caps & MMC_MODE_HS_52MHz))
 171                 writel(readl(&t2_base->ctl_prog_io1) & ~CTLPROGIO1SPEEDCTRL,
 172                         &t2_base->ctl_prog_io1);
 173
 174         writel(readl(&prcm_base->fclken1_core) |
 175                 EN_MMC1 | EN_MMC2 | EN_MMC3,
 176                 &prcm_base->fclken1_core);
 177
 178         writel(readl(&prcm_base->iclken1_core) |
 179                 EN_MMC1 | EN_MMC2 | EN_MMC3,
 180                 &prcm_base->iclken1_core);
 181 #endif
 182
 183 #if defined(CONFIG_OMAP54XX) || defined(CONFIG_OMAP44XX)
 184         /* PBIAS config needed for MMC1 only */
 185         if (mmc_get_blk_desc(mmc)->devnum == 0)
 186                 vmmc_pbias_config(LDO_VOLT_3V0);
 187 #endif
 188
 189         return 0;
 190 }
 191
 192 void mmc_init_stream(struct hsmmc *mmc_base)
 193 {
 194         ulong start;
 195
 196         writel(readl(&mmc_base->con) | INIT_INITSTREAM, &mmc_base->con);
 197
 198         writel(MMC_CMD0, &mmc_base->cmd);
 199         start = get_timer(0);
 200         while (!(readl(&mmc_base->stat) & CC_MASK)) {
 201                 if (get_timer(0) - start > MAX_RETRY_MS) {
 202                         printf("%s: timedout waiting for cc!\n", __func__);
 203                         return;
 204                 }
 205         }
 206         writel(CC_MASK, &mmc_base->stat)
 207                 ;
 208         writel(MMC_CMD0, &mmc_base->cmd)
 209                 ;
 210         start = get_timer(0);
 211         while (!(readl(&mmc_base->stat) & CC_MASK)) {
 212                 if (get_timer(0) - start > MAX_RETRY_MS) {
 213                         printf("%s: timedout waiting for cc2!\n", __func__);
 214                         return;
 215                 }
 216         }
 217         writel(readl(&mmc_base->con) & ~INIT_INITSTREAM, &mmc_base->con);
 218 }
 219
 220 static int omap_hsmmc_init_setup(struct mmc *mmc)
 221 {
 222         struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
 223         struct hsmmc *mmc_base;
 224         unsigned int reg_val;
 225         unsigned int dsor;
 226         ulong start;
 227
 228         mmc_base = priv->base_addr;
 229         mmc_board_init(mmc);
 230
 231         writel(readl(&mmc_base->sysconfig) | MMC_SOFTRESET,
 232                 &mmc_base->sysconfig);
 233         start = get_timer(0);
 234         while ((readl(&mmc_base->sysstatus) & RESETDONE) == 0) {
 235                 if (get_timer(0) - start > MAX_RETRY_MS) {
 236                         printf("%s: timedout waiting for cc2!\n", __func__);
 237                         return -ETIMEDOUT;
 238                 }
 239         }
 240         writel(readl(&mmc_base->sysctl) | SOFTRESETALL, &mmc_base->sysctl);
 241         start = get_timer(0);
 242         while ((readl(&mmc_base->sysctl) & SOFTRESETALL) != 0x0) {
 243                 if (get_timer(0) - start > MAX_RETRY_MS) {
 244                         printf("%s: timedout waiting for softresetall!\n",
 245                                 __func__);
 246                         return -ETIMEDOUT;
 247                 }
 248         }
 249         writel(DTW_1_BITMODE | SDBP_PWROFF | SDVS_3V0, &mmc_base->hctl);
 250         writel(readl(&mmc_base->capa) | VS30_3V0SUP | VS18_1V8SUP,
 251                 &mmc_base->capa);
 252
 253         reg_val = readl(&mmc_base->con) & RESERVED_MASK;
 254
 255         writel(CTPL_MMC_SD | reg_val | WPP_ACTIVEHIGH | CDP_ACTIVEHIGH |
 256                 MIT_CTO | DW8_1_4BITMODE | MODE_FUNC | STR_BLOCK |
 257                 HR_NOHOSTRESP | INIT_NOINIT | NOOPENDRAIN, &mmc_base->con);
 258
 259         dsor = 240;
 260         mmc_reg_out(&mmc_base->sysctl, (ICE_MASK | DTO_MASK | CEN_MASK),
 261                 (ICE_STOP | DTO_15THDTO | CEN_DISABLE));
 262         mmc_reg_out(&mmc_base->sysctl, ICE_MASK | CLKD_MASK,
 263                 (dsor << CLKD_OFFSET) | ICE_OSCILLATE);
 264         start = get_timer(0);
 265         while ((readl(&mmc_base->sysctl) & ICS_MASK) == ICS_NOTREADY) {
 266                 if (get_timer(0) - start > MAX_RETRY_MS) {
 267                         printf("%s: timedout waiting for ics!\n", __func__);
 268                         return -ETIMEDOUT;
 269                 }
 270         }
 271         writel(readl(&mmc_base->sysctl) | CEN_ENABLE, &mmc_base->sysctl);
 272
 273         writel(readl(&mmc_base->hctl) | SDBP_PWRON, &mmc_base->hctl);
 274
 275         writel(IE_BADA | IE_CERR | IE_DEB | IE_DCRC | IE_DTO | IE_CIE |
 276                 IE_CEB | IE_CCRC | IE_CTO | IE_BRR | IE_BWR | IE_TC | IE_CC,
 277                 &mmc_base->ie);
 278
 279         mmc_init_stream(mmc_base);
 280
 281         return 0;
 282 }
 283
 284 /*
 285  * MMC controller internal finite state machine reset
 286  *
 287  * Used to reset command or data internal state machines, using respectively
 288  * SRC or SRD bit of SYSCTL register
 289  */
 290 static void mmc_reset_controller_fsm(struct hsmmc *mmc_base, u32 bit)
 291 {
 292         ulong start;
 293
 294         mmc_reg_out(&mmc_base->sysctl, bit, bit);
 295
 296         /*
 297          * CMD(DAT) lines reset procedures are slightly different
 298          * for OMAP3 and OMAP4(AM335x,OMAP5,DRA7xx).
 299          * According to OMAP3 TRM:
 300          * Set SRC(SRD) bit in MMCHS_SYSCTL register to 0x1 and wait until it
 301          * returns to 0x0.
 302          * According to OMAP4(AM335x,OMAP5,DRA7xx) TRMs, CMD(DATA) lines reset
 303          * procedure steps must be as follows:
 304          * 1. Initiate CMD(DAT) line reset by writing 0x1 to SRC(SRD) bit in
 305          *    MMCHS_SYSCTL register (SD_SYSCTL for AM335x).
 306          * 2. Poll the SRC(SRD) bit until it is set to 0x1.
 307          * 3. Wait until the SRC (SRD) bit returns to 0x0
 308          *    (reset procedure is completed).
 309          */
 310 #if defined(CONFIG_OMAP44XX) || defined(CONFIG_OMAP54XX) || \
 311         defined(CONFIG_AM33XX) || defined(CONFIG_AM43XX)
 312         if (!(readl(&mmc_base->sysctl) & bit)) {
 313                 start = get_timer(0);
 314                 while (!(readl(&mmc_base->sysctl) & bit)) {
 315                         if (get_timer(0) - start > MAX_RETRY_MS)
 316                                 return;
 317                 }
 318         }
 319 #endif
 320         start = get_timer(0);
 321         while ((readl(&mmc_base->sysctl) & bit) != 0) {
 322                 if (get_timer(0) - start > MAX_RETRY_MS) {
 323                         printf("%s: timedout waiting for sysctl %x to clear\n",
 324                                 __func__, bit);
 325                         return;
 326                 }
 327         }
 328 }
 329 #ifndef CONFIG_DM_MMC
 330 static int omap_hsmmc_send_cmd(struct mmc *mmc, struct mmc_cmd *cmd,
 331                         struct mmc_data *data)
 332 {
 333         struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
 334 #else
 335 static int omap_hsmmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
 336                         struct mmc_data *data)
 337 {
 338         struct omap_hsmmc_data *priv = dev_get_priv(dev);
 339 #endif
 340         struct hsmmc *mmc_base;
 341         unsigned int flags, mmc_stat;
 342         ulong start;
 343
 344         mmc_base = priv->base_addr;
 345         start = get_timer(0);
 346         while ((readl(&mmc_base->pstate) & (DATI_MASK | CMDI_MASK)) != 0) {
 347                 if (get_timer(0) - start > MAX_RETRY_MS) {
 348                         printf("%s: timedout waiting on cmd inhibit to clear\n",
 349                                         __func__);
 350                         return -ETIMEDOUT;
 351                 }
 352         }
 353         writel(0xFFFFFFFF, &mmc_base->stat);
 354         start = get_timer(0);
 355         while (readl(&mmc_base->stat)) {
 356                 if (get_timer(0) - start > MAX_RETRY_MS) {
 357                         printf("%s: timedout waiting for STAT (%x) to clear\n",
 358                                 __func__, readl(&mmc_base->stat));
 359                         return -ETIMEDOUT;
 360                 }
 361         }
 362         /*
 363          * CMDREG
 364          * CMDIDX[13:8] : Command index
 365          * DATAPRNT[5]  : Data Present Select
 366          * ENCMDIDX[4]  : Command Index Check Enable
 367          * ENCMDCRC[3]  : Command CRC Check Enable
 368          * RSPTYP[1:0]
 369          *      00 = No Response
 370          *      01 = Length 136
 371          *      10 = Length 48
 372          *      11 = Length 48 Check busy after response
 373          */
 374         /* Delay added before checking the status of frq change
 375          * retry not supported by mmc.c(core file)
 376          */
 377         if (cmd->cmdidx == SD_CMD_APP_SEND_SCR)
 378                 udelay(50000); /* wait 50 ms */
 379
 380         if (!(cmd->resp_type & MMC_RSP_PRESENT))
 381                 flags = 0;
 382         else if (cmd->resp_type & MMC_RSP_136)
 383                 flags = RSP_TYPE_LGHT136 | CICE_NOCHECK;
 384         else if (cmd->resp_type & MMC_RSP_BUSY)
 385                 flags = RSP_TYPE_LGHT48B;
 386         else
 387                 flags = RSP_TYPE_LGHT48;
 388
 389         /* enable default flags */
 390         flags = flags | (CMD_TYPE_NORMAL | CICE_NOCHECK | CCCE_NOCHECK |
 391                         MSBS_SGLEBLK | ACEN_DISABLE | BCE_DISABLE | DE_DISABLE);
 392
 393         if (cmd->resp_type & MMC_RSP_CRC)
 394                 flags |= CCCE_CHECK;
 395         if (cmd->resp_type & MMC_RSP_OPCODE)
 396                 flags |= CICE_CHECK;
 397
 398         if (data) {
 399                 if ((cmd->cmdidx == MMC_CMD_READ_MULTIPLE_BLOCK) ||
 400                          (cmd->cmdidx == MMC_CMD_WRITE_MULTIPLE_BLOCK)) {
 401                         flags |= (MSBS_MULTIBLK | BCE_ENABLE);
 402                         data->blocksize = 512;
 403                         writel(data->blocksize | (data->blocks << 16),
 404                                                         &mmc_base->blk);
 405                 } else
 406                         writel(data->blocksize | NBLK_STPCNT, &mmc_base->blk);
 407
 408                 if (data->flags & MMC_DATA_READ)
 409                         flags |= (DP_DATA | DDIR_READ);
 410                 else
 411                         flags |= (DP_DATA | DDIR_WRITE);
 412         }
 413
 414         writel(cmd->cmdarg, &mmc_base->arg);
 415         udelay(20);             /* To fix "No status update" error on eMMC */
 416         writel((cmd->cmdidx << 24) | flags, &mmc_base->cmd);
 417
 418         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 : timeout: No status update\n", __func__);
 423                         return -ETIMEDOUT;
 424                 }
 425         } while (!mmc_stat);
 426
 427         if ((mmc_stat & IE_CTO) != 0) {
 428                 mmc_reset_controller_fsm(mmc_base, SYSCTL_SRC);
 429                 return -ETIMEDOUT;
 430         } else if ((mmc_stat & ERRI_MASK) != 0)
 431                 return -1;
 432
 433         if (mmc_stat & CC_MASK) {
 434                 writel(CC_MASK, &mmc_base->stat);
 435                 if (cmd->resp_type & MMC_RSP_PRESENT) {
 436                         if (cmd->resp_type & MMC_RSP_136) {
 437                                 /* response type 2 */
 438                                 cmd->response[3] = readl(&mmc_base->rsp10);
 439                                 cmd->response[2] = readl(&mmc_base->rsp32);
 440                                 cmd->response[1] = readl(&mmc_base->rsp54);
 441                                 cmd->response[0] = readl(&mmc_base->rsp76);
 442                         } else
 443                                 /* response types 1, 1b, 3, 4, 5, 6 */
 444                                 cmd->response[0] = readl(&mmc_base->rsp10);
 445                 }
 446         }
 447
 448         if (data && (data->flags & MMC_DATA_READ)) {
 449                 mmc_read_data(mmc_base, data->dest,
 450                                 data->blocksize * data->blocks);
 451         } else if (data && (data->flags & MMC_DATA_WRITE)) {
 452                 mmc_write_data(mmc_base, data->src,
 453                                 data->blocksize * data->blocks);
 454         }
 455         return 0;
 456 }
 457
 458 static int mmc_read_data(struct hsmmc *mmc_base, char *buf, unsigned int size)
 459 {
 460         unsigned int *output_buf = (unsigned int *)buf;
 461         unsigned int mmc_stat;
 462         unsigned int count;
 463
 464         /*
 465          * Start Polled Read
 466          */
 467         count = (size > MMCSD_SECTOR_SIZE) ? MMCSD_SECTOR_SIZE : size;
 468         count /= 4;
 469
 470         while (size) {
 471                 ulong start = get_timer(0);
 472                 do {
 473                         mmc_stat = readl(&mmc_base->stat);
 474                         if (get_timer(0) - start > MAX_RETRY_MS) {
 475                                 printf("%s: timedout waiting for status!\n",
 476                                                 __func__);
 477                                 return -ETIMEDOUT;
 478                         }
 479                 } while (mmc_stat == 0);
 480
 481                 if ((mmc_stat & (IE_DTO | IE_DCRC | IE_DEB)) != 0)
 482                         mmc_reset_controller_fsm(mmc_base, SYSCTL_SRD);
 483
 484                 if ((mmc_stat & ERRI_MASK) != 0)
 485                         return 1;
 486
 487                 if (mmc_stat & BRR_MASK) {
 488                         unsigned int k;
 489
 490                         writel(readl(&mmc_base->stat) | BRR_MASK,
 491                                 &mmc_base->stat);
 492                         for (k = 0; k < count; k++) {
 493                                 *output_buf = readl(&mmc_base->data);
 494                                 output_buf++;
 495                         }
 496                         size -= (count*4);
 497                 }
 498
 499                 if (mmc_stat & BWR_MASK)
 500                         writel(readl(&mmc_base->stat) | BWR_MASK,
 501                                 &mmc_base->stat);
 502
 503                 if (mmc_stat & TC_MASK) {
 504                         writel(readl(&mmc_base->stat) | TC_MASK,
 505                                 &mmc_base->stat);
 506                         break;
 507                 }
 508         }
 509         return 0;
 510 }
 511
 512 static int mmc_write_data(struct hsmmc *mmc_base, const char *buf,
 513                                 unsigned int size)
 514 {
 515         unsigned int *input_buf = (unsigned int *)buf;
 516         unsigned int mmc_stat;
 517         unsigned int count;
 518
 519         /*
 520          * Start Polled Write
 521          */
 522         count = (size > MMCSD_SECTOR_SIZE) ? MMCSD_SECTOR_SIZE : size;
 523         count /= 4;
 524
 525         while (size) {
 526                 ulong start = get_timer(0);
 527                 do {
 528                         mmc_stat = readl(&mmc_base->stat);
 529                         if (get_timer(0) - start > MAX_RETRY_MS) {
 530                                 printf("%s: timedout waiting for status!\n",
 531                                                 __func__);
 532                                 return -ETIMEDOUT;
 533                         }
 534                 } while (mmc_stat == 0);
 535
 536                 if ((mmc_stat & (IE_DTO | IE_DCRC | IE_DEB)) != 0)
 537                         mmc_reset_controller_fsm(mmc_base, SYSCTL_SRD);
 538
 539                 if ((mmc_stat & ERRI_MASK) != 0)
 540                         return 1;
 541
 542                 if (mmc_stat & BWR_MASK) {
 543                         unsigned int k;
 544
 545                         writel(readl(&mmc_base->stat) | BWR_MASK,
 546                                         &mmc_base->stat);
 547                         for (k = 0; k < count; k++) {
 548                                 writel(*input_buf, &mmc_base->data);
 549                                 input_buf++;
 550                         }
 551                         size -= (count*4);
 552                 }
 553
 554                 if (mmc_stat & BRR_MASK)
 555                         writel(readl(&mmc_base->stat) | BRR_MASK,
 556                                 &mmc_base->stat);
 557
 558                 if (mmc_stat & TC_MASK) {
 559                         writel(readl(&mmc_base->stat) | TC_MASK,
 560                                 &mmc_base->stat);
 561                         break;
 562                 }
 563         }
 564         return 0;
 565 }
 566
 567 #ifndef CONFIG_DM_MMC
 568 static int omap_hsmmc_set_ios(struct mmc *mmc)
 569 {
 570         struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
 571 #else
 572 static int omap_hsmmc_set_ios(struct udevice *dev)
 573 {
 574         struct omap_hsmmc_data *priv = dev_get_priv(dev);
 575         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
 576         struct mmc *mmc = upriv->mmc;
 577 #endif
 578         struct hsmmc *mmc_base;
 579         unsigned int dsor = 0;
 580         ulong start;
 581
 582         mmc_base = priv->base_addr;
 583         /* configue bus width */
 584         switch (mmc->bus_width) {
 585         case 8:
 586                 writel(readl(&mmc_base->con) | DTW_8_BITMODE,
 587                         &mmc_base->con);
 588                 break;
 589
 590         case 4:
 591                 writel(readl(&mmc_base->con) & ~DTW_8_BITMODE,
 592                         &mmc_base->con);
 593                 writel(readl(&mmc_base->hctl) | DTW_4_BITMODE,
 594                         &mmc_base->hctl);
 595                 break;
 596
 597         case 1:
 598         default:
 599                 writel(readl(&mmc_base->con) & ~DTW_8_BITMODE,
 600                         &mmc_base->con);
 601                 writel(readl(&mmc_base->hctl) & ~DTW_4_BITMODE,
 602                         &mmc_base->hctl);
 603                 break;
 604         }
 605
 606         /* configure clock with 96Mhz system clock.
 607          */
 608         if (mmc->clock != 0) {
 609                 dsor = (MMC_CLOCK_REFERENCE * 1000000 / mmc->clock);
 610                 if ((MMC_CLOCK_REFERENCE * 1000000) / dsor > mmc->clock)
 611                         dsor++;
 612         }
 613
 614         mmc_reg_out(&mmc_base->sysctl, (ICE_MASK | DTO_MASK | CEN_MASK),
 615                                 (ICE_STOP | DTO_15THDTO | CEN_DISABLE));
 616
 617         mmc_reg_out(&mmc_base->sysctl, ICE_MASK | CLKD_MASK,
 618                                 (dsor << CLKD_OFFSET) | ICE_OSCILLATE);
 619
 620         start = get_timer(0);
 621         while ((readl(&mmc_base->sysctl) & ICS_MASK) == ICS_NOTREADY) {
 622                 if (get_timer(0) - start > MAX_RETRY_MS) {
 623                         printf("%s: timedout waiting for ics!\n", __func__);
 624                         return -ETIMEDOUT;
 625                 }
 626         }
 627         writel(readl(&mmc_base->sysctl) | CEN_ENABLE, &mmc_base->sysctl);
 628
 629         return 0;
 630 }
 631
 632 #ifdef OMAP_HSMMC_USE_GPIO
 633 #ifdef CONFIG_DM_MMC
 634 static int omap_hsmmc_getcd(struct udevice *dev)
 635 {
 636         struct omap_hsmmc_data *priv = dev_get_priv(dev);
 637         int value;
 638
 639         value = dm_gpio_get_value(&priv->cd_gpio);
 640         /* if no CD return as 1 */
 641         if (value < 0)
 642                 return 1;
 643
 644         if (priv->cd_inverted)
 645                 return !value;
 646         return value;
 647 }
 648
 649 static int omap_hsmmc_getwp(struct udevice *dev)
 650 {
 651         struct omap_hsmmc_data *priv = dev_get_priv(dev);
 652         int value;
 653
 654         value = dm_gpio_get_value(&priv->wp_gpio);
 655         /* if no WP return as 0 */
 656         if (value < 0)
 657                 return 0;
 658         return value;
 659 }
 660 #else
 661 static int omap_hsmmc_getcd(struct mmc *mmc)
 662 {
 663         struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
 664         int cd_gpio;
 665
 666         /* if no CD return as 1 */
 667         cd_gpio = priv->cd_gpio;
 668         if (cd_gpio < 0)
 669                 return 1;
 670
 671         /* NOTE: assumes card detect signal is active-low */
 672         return !gpio_get_value(cd_gpio);
 673 }
 674
 675 static int omap_hsmmc_getwp(struct mmc *mmc)
 676 {
 677         struct omap_hsmmc_data *priv = omap_hsmmc_get_data(mmc);
 678         int wp_gpio;
 679
 680         /* if no WP return as 0 */
 681         wp_gpio = priv->wp_gpio;
 682         if (wp_gpio < 0)
 683                 return 0;
 684
 685         /* NOTE: assumes write protect signal is active-high */
 686         return gpio_get_value(wp_gpio);
 687 }
 688 #endif
 689 #endif
 690
 691 #ifdef CONFIG_DM_MMC
 692 static const struct dm_mmc_ops omap_hsmmc_ops = {
 693         .send_cmd       = omap_hsmmc_send_cmd,
 694         .set_ios        = omap_hsmmc_set_ios,
 695 #ifdef OMAP_HSMMC_USE_GPIO
 696         .get_cd         = omap_hsmmc_getcd,
 697         .get_wp         = omap_hsmmc_getwp,
 698 #endif
 699 };
 700 #else
 701 static const struct mmc_ops omap_hsmmc_ops = {
 702         .send_cmd       = omap_hsmmc_send_cmd,
 703         .set_ios        = omap_hsmmc_set_ios,
 704         .init           = omap_hsmmc_init_setup,
 705 #ifdef OMAP_HSMMC_USE_GPIO
 706         .getcd          = omap_hsmmc_getcd,
 707         .getwp          = omap_hsmmc_getwp,
 708 #endif
 709 };
 710 #endif
 711
 712 #ifndef CONFIG_DM_MMC
 713 int omap_mmc_init(int dev_index, uint host_caps_mask, uint f_max, int cd_gpio,
 714                 int wp_gpio)
 715 {
 716         struct mmc *mmc;
 717         struct omap_hsmmc_data *priv;
 718         struct mmc_config *cfg;
 719         uint host_caps_val;
 720
 721         priv = malloc(sizeof(*priv));
 722         if (priv == NULL)
 723                 return -1;
 724
 725         host_caps_val = MMC_MODE_4BIT | MMC_MODE_HS_52MHz | MMC_MODE_HS;
 726
 727         switch (dev_index) {
 728         case 0:
 729                 priv->base_addr = (struct hsmmc *)OMAP_HSMMC1_BASE;
 730                 break;
 731 #ifdef OMAP_HSMMC2_BASE
 732         case 1:
 733                 priv->base_addr = (struct hsmmc *)OMAP_HSMMC2_BASE;
 734 #if (defined(CONFIG_OMAP44XX) || defined(CONFIG_OMAP54XX) || \
 735         defined(CONFIG_DRA7XX) || defined(CONFIG_AM33XX) || \
 736         defined(CONFIG_AM43XX) || defined(CONFIG_SOC_KEYSTONE)) && \
 737                 defined(CONFIG_HSMMC2_8BIT)
 738                 /* Enable 8-bit interface for eMMC on OMAP4/5 or DRA7XX */
 739                 host_caps_val |= MMC_MODE_8BIT;
 740 #endif
 741                 break;
 742 #endif
 743 #ifdef OMAP_HSMMC3_BASE
 744         case 2:
 745                 priv->base_addr = (struct hsmmc *)OMAP_HSMMC3_BASE;
 746 #if defined(CONFIG_DRA7XX) && defined(CONFIG_HSMMC3_8BIT)
 747                 /* Enable 8-bit interface for eMMC on DRA7XX */
 748                 host_caps_val |= MMC_MODE_8BIT;
 749 #endif
 750                 break;
 751 #endif
 752         default:
 753                 priv->base_addr = (struct hsmmc *)OMAP_HSMMC1_BASE;
 754                 return 1;
 755         }
 756 #ifdef OMAP_HSMMC_USE_GPIO
 757         /* on error gpio values are set to -1, which is what we want */
 758         priv->cd_gpio = omap_mmc_setup_gpio_in(cd_gpio, "mmc_cd");
 759         priv->wp_gpio = omap_mmc_setup_gpio_in(wp_gpio, "mmc_wp");
 760 #endif
 761
 762         cfg = &priv->cfg;
 763
 764         cfg->name = "OMAP SD/MMC";
 765         cfg->ops = &omap_hsmmc_ops;
 766
 767         cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
 768         cfg->host_caps = host_caps_val & ~host_caps_mask;
 769
 770         cfg->f_min = 400000;
 771
 772         if (f_max != 0)
 773                 cfg->f_max = f_max;
 774         else {
 775                 if (cfg->host_caps & MMC_MODE_HS) {
 776                         if (cfg->host_caps & MMC_MODE_HS_52MHz)
 777                                 cfg->f_max = 52000000;
 778                         else
 779                                 cfg->f_max = 26000000;
 780                 } else
 781                         cfg->f_max = 20000000;
 782         }
 783
 784         cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
 785
 786 #if defined(CONFIG_OMAP34XX)
 787         /*
 788          * Silicon revs 2.1 and older do not support multiblock transfers.
 789          */
 790         if ((get_cpu_family() == CPU_OMAP34XX) && (get_cpu_rev() <= CPU_3XX_ES21))
 791                 cfg->b_max = 1;
 792 #endif
 793         mmc = mmc_create(cfg, priv);
 794         if (mmc == NULL)
 795                 return -1;
 796
 797         return 0;
 798 }
 799 #else
 800 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
 801 static int omap_hsmmc_ofdata_to_platdata(struct udevice *dev)
 802 {
 803         struct omap_hsmmc_plat *plat = dev_get_platdata(dev);
 804         struct mmc_config *cfg = &plat->cfg;
 805         struct omap2_mmc_platform_config *data =
 806                 (struct omap2_mmc_platform_config *)dev_get_driver_data(dev);
 807         const void *fdt = gd->fdt_blob;
 808         int node = dev_of_offset(dev);
 809         int val;
 810
 811         plat->base_addr = map_physmem(dev_get_addr(dev), sizeof(struct hsmmc *),
 812                                       MAP_NOCACHE) + data->reg_offset;
 813
 814         cfg->host_caps = MMC_MODE_HS_52MHz | MMC_MODE_HS;
 815         val = fdtdec_get_int(fdt, node, "bus-width", -1);
 816         if (val < 0) {
 817                 printf("error: bus-width property missing\n");
 818                 return -ENOENT;
 819         }
 820
 821         switch (val) {
 822         case 0x8:
 823                 cfg->host_caps |= MMC_MODE_8BIT;
 824         case 0x4:
 825                 cfg->host_caps |= MMC_MODE_4BIT;
 826                 break;
 827         default:
 828                 printf("error: invalid bus-width property\n");
 829                 return -ENOENT;
 830         }
 831
 832         cfg->f_min = 400000;
 833         cfg->f_max = fdtdec_get_int(fdt, node, "max-frequency", 52000000);
 834         cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34 | MMC_VDD_165_195;
 835         cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
 836
 837 #ifdef OMAP_HSMMC_USE_GPIO
 838         plat->cd_inverted = fdtdec_get_bool(fdt, node, "cd-inverted");
 839 #endif
 840
 841         return 0;
 842 }
 843 #endif
 844
 845 #ifdef CONFIG_BLK
 846
 847 static int omap_hsmmc_bind(struct udevice *dev)
 848 {
 849         struct omap_hsmmc_plat *plat = dev_get_platdata(dev);
 850
 851         return mmc_bind(dev, &plat->mmc, &plat->cfg);
 852 }
 853 #endif
 854 static int omap_hsmmc_probe(struct udevice *dev)
 855 {
 856         struct omap_hsmmc_plat *plat = dev_get_platdata(dev);
 857         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
 858         struct omap_hsmmc_data *priv = dev_get_priv(dev);
 859         struct mmc_config *cfg = &plat->cfg;
 860         struct mmc *mmc;
 861
 862         cfg->name = "OMAP SD/MMC";
 863         priv->base_addr = plat->base_addr;
 864 #ifdef OMAP_HSMMC_USE_GPIO
 865         priv->cd_inverted = plat->cd_inverted;
 866 #endif
 867
 868 #ifdef CONFIG_BLK
 869         mmc = &plat->mmc;
 870 #else
 871         mmc = mmc_create(cfg, priv);
 872         if (mmc == NULL)
 873                 return -1;
 874 #endif
 875
 876 #if defined(OMAP_HSMMC_USE_GPIO) && CONFIG_IS_ENABLED(OF_CONTROL)
 877         gpio_request_by_name(dev, "cd-gpios", 0, &priv->cd_gpio, GPIOD_IS_IN);
 878         gpio_request_by_name(dev, "wp-gpios", 0, &priv->wp_gpio, GPIOD_IS_IN);
 879 #endif
 880
 881         mmc->dev = dev;
 882         upriv->mmc = mmc;
 883
 884         return omap_hsmmc_init_setup(mmc);
 885 }
 886
 887 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
 888 static const struct omap2_mmc_platform_config omap3_mmc_pdata = {
 889         .reg_offset = 0,
 890 };
 891
 892 static const struct omap2_mmc_platform_config am33xx_mmc_pdata = {
 893         .reg_offset = 0x100,
 894 };
 895
 896 static const struct omap2_mmc_platform_config omap4_mmc_pdata = {
 897         .reg_offset = 0x100,
 898 };
 899
 900 static const struct udevice_id omap_hsmmc_ids[] = {
 901         {
 902                         .compatible = "ti,omap3-hsmmc",
 903                         .data = (ulong)&omap3_mmc_pdata
 904         },
 905         {
 906                         .compatible = "ti,omap4-hsmmc",
 907                         .data = (ulong)&omap4_mmc_pdata
 908         },
 909         {
 910                         .compatible = "ti,am33xx-hsmmc",
 911                         .data = (ulong)&am33xx_mmc_pdata
 912         },
 913         { }
 914 };
 915 #endif
 916
 917 U_BOOT_DRIVER(omap_hsmmc) = {
 918         .name   = "omap_hsmmc",
 919         .id     = UCLASS_MMC,
 920 #if CONFIG_IS_ENABLED(OF_CONTROL) && !CONFIG_IS_ENABLED(OF_PLATDATA)
 921         .of_match = omap_hsmmc_ids,
 922         .ofdata_to_platdata = omap_hsmmc_ofdata_to_platdata,
 923         .platdata_auto_alloc_size = sizeof(struct omap_hsmmc_plat),
 924 #endif
 925 #ifdef CONFIG_BLK
 926         .bind = omap_hsmmc_bind,
 927 #endif
 928         .ops = &omap_hsmmc_ops,
 929         .probe  = omap_hsmmc_probe,
 930         .priv_auto_alloc_size = sizeof(struct omap_hsmmc_data),
 931         .flags  = DM_FLAG_PRE_RELOC,
 932 };
 933 #endif