drivers/mmc/sdhci.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * Copyright 2011, Marvell Semiconductor Inc.
   4  * Lei Wen <leiwen@marvell.com>
   5  *
   6  * Back ported to the 8xx platform (from the 8260 platform) by
   7  * Murray.Jensen@cmst.csiro.au, 27-Jan-01.
   8  */
   9
  10 #include <common.h>
  11 #include <errno.h>
  12 #include <malloc.h>
  13 #include <mmc.h>
  14 #include <sdhci.h>
  15
  16 #if defined(CONFIG_FIXED_SDHCI_ALIGNED_BUFFER)
  17 void *aligned_buffer = (void *)CONFIG_FIXED_SDHCI_ALIGNED_BUFFER;
  18 #else
  19 void *aligned_buffer;
  20 #endif
  21
  22 static void sdhci_reset(struct sdhci_host *host, u8 mask)
  23 {
  24         unsigned long timeout;
  25
  26         /* Wait max 100 ms */
  27         timeout = 100;
  28         sdhci_writeb(host, mask, SDHCI_SOFTWARE_RESET);
  29         while (sdhci_readb(host, SDHCI_SOFTWARE_RESET) & mask) {
  30                 if (timeout == 0) {
  31                         printf("%s: Reset 0x%x never completed.\n",
  32                                __func__, (int)mask);
  33                         return;
  34                 }
  35                 timeout--;
  36                 udelay(1000);
  37         }
  38 }
  39
  40 static void sdhci_cmd_done(struct sdhci_host *host, struct mmc_cmd *cmd)
  41 {
  42         int i;
  43         if (cmd->resp_type & MMC_RSP_136) {
  44                 /* CRC is stripped so we need to do some shifting. */
  45                 for (i = 0; i < 4; i++) {
  46                         cmd->response[i] = sdhci_readl(host,
  47                                         SDHCI_RESPONSE + (3-i)*4) << 8;
  48                         if (i != 3)
  49                                 cmd->response[i] |= sdhci_readb(host,
  50                                                 SDHCI_RESPONSE + (3-i)*4-1);
  51                 }
  52         } else {
  53                 cmd->response[0] = sdhci_readl(host, SDHCI_RESPONSE);
  54         }
  55 }
  56
  57 static void sdhci_transfer_pio(struct sdhci_host *host, struct mmc_data *data)
  58 {
  59         int i;
  60         char *offs;
  61         for (i = 0; i < data->blocksize; i += 4) {
  62                 offs = data->dest + i;
  63                 if (data->flags == MMC_DATA_READ)
  64                         *(u32 *)offs = sdhci_readl(host, SDHCI_BUFFER);
  65                 else
  66                         sdhci_writel(host, *(u32 *)offs, SDHCI_BUFFER);
  67         }
  68 }
  69
  70 static int sdhci_transfer_data(struct sdhci_host *host, struct mmc_data *data,
  71                                 unsigned int start_addr)
  72 {
  73         unsigned int stat, rdy, mask, timeout, block = 0;
  74         bool transfer_done = false;
  75 #ifdef CONFIG_MMC_SDHCI_SDMA
  76         unsigned char ctrl;
  77         ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
  78         ctrl &= ~SDHCI_CTRL_DMA_MASK;
  79         sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
  80 #endif
  81
  82         timeout = 1000000;
  83         rdy = SDHCI_INT_SPACE_AVAIL | SDHCI_INT_DATA_AVAIL;
  84         mask = SDHCI_DATA_AVAILABLE | SDHCI_SPACE_AVAILABLE;
  85         do {
  86                 stat = sdhci_readl(host, SDHCI_INT_STATUS);
  87                 if (stat & SDHCI_INT_ERROR) {
  88                         pr_debug("%s: Error detected in status(0x%X)!\n",
  89                                  __func__, stat);
  90                         return -EIO;
  91                 }
  92                 if (!transfer_done && (stat & rdy)) {
  93                         if (!(sdhci_readl(host, SDHCI_PRESENT_STATE) & mask))
  94                                 continue;
  95                         sdhci_writel(host, rdy, SDHCI_INT_STATUS);
  96                         sdhci_transfer_pio(host, data);
  97                         data->dest += data->blocksize;
  98                         if (++block >= data->blocks) {
  99                                 /* Keep looping until the SDHCI_INT_DATA_END is
 100                                  * cleared, even if we finished sending all the
 101                                  * blocks.
 102                                  */
 103                                 transfer_done = true;
 104                                 continue;
 105                         }
 106                 }
 107 #ifdef CONFIG_MMC_SDHCI_SDMA
 108                 if (!transfer_done && (stat & SDHCI_INT_DMA_END)) {
 109                         sdhci_writel(host, SDHCI_INT_DMA_END, SDHCI_INT_STATUS);
 110                         start_addr &= ~(SDHCI_DEFAULT_BOUNDARY_SIZE - 1);
 111                         start_addr += SDHCI_DEFAULT_BOUNDARY_SIZE;
 112                         sdhci_writel(host, start_addr, SDHCI_DMA_ADDRESS);
 113                 }
 114 #endif
 115                 if (timeout-- > 0)
 116                         udelay(10);
 117                 else {
 118                         printf("%s: Transfer data timeout\n", __func__);
 119                         return -ETIMEDOUT;
 120                 }
 121         } while (!(stat & SDHCI_INT_DATA_END));
 122         return 0;
 123 }
 124
 125 /*
 126  * No command will be sent by driver if card is busy, so driver must wait
 127  * for card ready state.
 128  * Every time when card is busy after timeout then (last) timeout value will be
 129  * increased twice but only if it doesn't exceed global defined maximum.
 130  * Each function call will use last timeout value.
 131  */
 132 #define SDHCI_CMD_MAX_TIMEOUT                   3200
 133 #define SDHCI_CMD_DEFAULT_TIMEOUT               100
 134 #define SDHCI_READ_STATUS_TIMEOUT               1000
 135
 136 #ifdef CONFIG_DM_MMC
 137 static int sdhci_send_command(struct udevice *dev, struct mmc_cmd *cmd,
 138                               struct mmc_data *data)
 139 {
 140         struct mmc *mmc = mmc_get_mmc_dev(dev);
 141
 142 #else
 143 static int sdhci_send_command(struct mmc *mmc, struct mmc_cmd *cmd,
 144                               struct mmc_data *data)
 145 {
 146 #endif
 147         struct sdhci_host *host = mmc->priv;
 148         unsigned int stat = 0;
 149         int ret = 0;
 150         int trans_bytes = 0, is_aligned = 1;
 151         u32 mask, flags, mode;
 152         unsigned int time = 0, start_addr = 0;
 153         int mmc_dev = mmc_get_blk_desc(mmc)->devnum;
 154         ulong start = get_timer(0);
 155
 156         /* Timeout unit - ms */
 157         static unsigned int cmd_timeout = SDHCI_CMD_DEFAULT_TIMEOUT;
 158
 159         mask = SDHCI_CMD_INHIBIT | SDHCI_DATA_INHIBIT;
 160
 161         /* We shouldn't wait for data inihibit for stop commands, even
 162            though they might use busy signaling */
 163         if (cmd->cmdidx == MMC_CMD_STOP_TRANSMISSION ||
 164             ((cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK ||
 165               cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK_HS200) && !data))
 166                 mask &= ~SDHCI_DATA_INHIBIT;
 167
 168         while (sdhci_readl(host, SDHCI_PRESENT_STATE) & mask) {
 169                 if (time >= cmd_timeout) {
 170                         printf("%s: MMC: %d busy ", __func__, mmc_dev);
 171                         if (2 * cmd_timeout <= SDHCI_CMD_MAX_TIMEOUT) {
 172                                 cmd_timeout += cmd_timeout;
 173                                 printf("timeout increasing to: %u ms.\n",
 174                                        cmd_timeout);
 175                         } else {
 176                                 puts("timeout.\n");
 177                                 return -ECOMM;
 178                         }
 179                 }
 180                 time++;
 181                 udelay(1000);
 182         }
 183
 184         sdhci_writel(host, SDHCI_INT_ALL_MASK, SDHCI_INT_STATUS);
 185
 186         mask = SDHCI_INT_RESPONSE;
 187         if ((cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK ||
 188              cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK_HS200) && !data)
 189                 mask = SDHCI_INT_DATA_AVAIL;
 190
 191         if (!(cmd->resp_type & MMC_RSP_PRESENT))
 192                 flags = SDHCI_CMD_RESP_NONE;
 193         else if (cmd->resp_type & MMC_RSP_136)
 194                 flags = SDHCI_CMD_RESP_LONG;
 195         else if (cmd->resp_type & MMC_RSP_BUSY) {
 196                 flags = SDHCI_CMD_RESP_SHORT_BUSY;
 197                 if (data)
 198                         mask |= SDHCI_INT_DATA_END;
 199         } else
 200                 flags = SDHCI_CMD_RESP_SHORT;
 201
 202         if (cmd->resp_type & MMC_RSP_CRC)
 203                 flags |= SDHCI_CMD_CRC;
 204         if (cmd->resp_type & MMC_RSP_OPCODE)
 205                 flags |= SDHCI_CMD_INDEX;
 206         if (data || cmd->cmdidx ==  MMC_CMD_SEND_TUNING_BLOCK ||
 207             cmd->cmdidx == MMC_CMD_SEND_TUNING_BLOCK_HS200)
 208                 flags |= SDHCI_CMD_DATA;
 209
 210         /* Set Transfer mode regarding to data flag */
 211         if (data) {
 212                 sdhci_writeb(host, 0xe, SDHCI_TIMEOUT_CONTROL);
 213                 mode = SDHCI_TRNS_BLK_CNT_EN;
 214                 trans_bytes = data->blocks * data->blocksize;
 215                 if (data->blocks > 1)
 216                         mode |= SDHCI_TRNS_MULTI;
 217
 218                 if (data->flags == MMC_DATA_READ)
 219                         mode |= SDHCI_TRNS_READ;
 220
 221 #ifdef CONFIG_MMC_SDHCI_SDMA
 222                 if (data->flags == MMC_DATA_READ)
 223                         start_addr = (unsigned long)data->dest;
 224                 else
 225                         start_addr = (unsigned long)data->src;
 226                 if ((host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) &&
 227                                 (start_addr & 0x7) != 0x0) {
 228                         is_aligned = 0;
 229                         start_addr = (unsigned long)aligned_buffer;
 230                         if (data->flags != MMC_DATA_READ)
 231                                 memcpy(aligned_buffer, data->src, trans_bytes);
 232                 }
 233
 234 #if defined(CONFIG_FIXED_SDHCI_ALIGNED_BUFFER)
 235                 /*
 236                  * Always use this bounce-buffer when
 237                  * CONFIG_FIXED_SDHCI_ALIGNED_BUFFER is defined
 238                  */
 239                 is_aligned = 0;
 240                 start_addr = (unsigned long)aligned_buffer;
 241                 if (data->flags != MMC_DATA_READ)
 242                         memcpy(aligned_buffer, data->src, trans_bytes);
 243 #endif
 244
 245                 sdhci_writel(host, start_addr, SDHCI_DMA_ADDRESS);
 246                 mode |= SDHCI_TRNS_DMA;
 247 #endif
 248                 sdhci_writew(host, SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG,
 249                                 data->blocksize),
 250                                 SDHCI_BLOCK_SIZE);
 251                 sdhci_writew(host, data->blocks, SDHCI_BLOCK_COUNT);
 252                 sdhci_writew(host, mode, SDHCI_TRANSFER_MODE);
 253         } else if (cmd->resp_type & MMC_RSP_BUSY) {
 254                 sdhci_writeb(host, 0xe, SDHCI_TIMEOUT_CONTROL);
 255         }
 256
 257         sdhci_writel(host, cmd->cmdarg, SDHCI_ARGUMENT);
 258 #ifdef CONFIG_MMC_SDHCI_SDMA
 259         if (data) {
 260                 trans_bytes = ALIGN(trans_bytes, CONFIG_SYS_CACHELINE_SIZE);
 261                 flush_cache(start_addr, trans_bytes);
 262         }
 263 #endif
 264         sdhci_writew(host, SDHCI_MAKE_CMD(cmd->cmdidx, flags), SDHCI_COMMAND);
 265         start = get_timer(0);
 266         do {
 267                 stat = sdhci_readl(host, SDHCI_INT_STATUS);
 268                 if (stat & SDHCI_INT_ERROR)
 269                         break;
 270
 271                 if (get_timer(start) >= SDHCI_READ_STATUS_TIMEOUT) {
 272                         if (host->quirks & SDHCI_QUIRK_BROKEN_R1B) {
 273                                 return 0;
 274                         } else {
 275                                 printf("%s: Timeout for status update!\n",
 276                                        __func__);
 277                                 return -ETIMEDOUT;
 278                         }
 279                 }
 280         } while ((stat & mask) != mask);
 281
 282         if ((stat & (SDHCI_INT_ERROR | mask)) == mask) {
 283                 sdhci_cmd_done(host, cmd);
 284                 sdhci_writel(host, mask, SDHCI_INT_STATUS);
 285         } else
 286                 ret = -1;
 287
 288         if (!ret && data)
 289                 ret = sdhci_transfer_data(host, data, start_addr);
 290
 291         if (host->quirks & SDHCI_QUIRK_WAIT_SEND_CMD)
 292                 udelay(1000);
 293
 294         stat = sdhci_readl(host, SDHCI_INT_STATUS);
 295         sdhci_writel(host, SDHCI_INT_ALL_MASK, SDHCI_INT_STATUS);
 296         if (!ret) {
 297                 if ((host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) &&
 298                                 !is_aligned && (data->flags == MMC_DATA_READ))
 299                         memcpy(data->dest, aligned_buffer, trans_bytes);
 300                 return 0;
 301         }
 302
 303         sdhci_reset(host, SDHCI_RESET_CMD);
 304         sdhci_reset(host, SDHCI_RESET_DATA);
 305         if (stat & SDHCI_INT_TIMEOUT)
 306                 return -ETIMEDOUT;
 307         else
 308                 return -ECOMM;
 309 }
 310
 311 #if defined(CONFIG_DM_MMC) && defined(MMC_SUPPORTS_TUNING)
 312 static int sdhci_execute_tuning(struct udevice *dev, uint opcode)
 313 {
 314         int err;
 315         struct mmc *mmc = mmc_get_mmc_dev(dev);
 316         struct sdhci_host *host = mmc->priv;
 317
 318         debug("%s\n", __func__);
 319
 320         if (host->ops && host->ops->platform_execute_tuning) {
 321                 err = host->ops->platform_execute_tuning(mmc, opcode);
 322                 if (err)
 323                         return err;
 324                 return 0;
 325         }
 326         return 0;
 327 }
 328 #endif
 329 static int sdhci_set_clock(struct mmc *mmc, unsigned int clock)
 330 {
 331         struct sdhci_host *host = mmc->priv;
 332         unsigned int div, clk = 0, timeout;
 333
 334         /* Wait max 20 ms */
 335         timeout = 200;
 336         while (sdhci_readl(host, SDHCI_PRESENT_STATE) &
 337                            (SDHCI_CMD_INHIBIT | SDHCI_DATA_INHIBIT)) {
 338                 if (timeout == 0) {
 339                         printf("%s: Timeout to wait cmd & data inhibit\n",
 340                                __func__);
 341                         return -EBUSY;
 342                 }
 343
 344                 timeout--;
 345                 udelay(100);
 346         }
 347
 348         sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
 349
 350         if (clock == 0)
 351                 return 0;
 352
 353         if (host->ops && host->ops->set_delay)
 354                 host->ops->set_delay(host);
 355
 356         if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300) {
 357                 /*
 358                  * Check if the Host Controller supports Programmable Clock
 359                  * Mode.
 360                  */
 361                 if (host->clk_mul) {
 362                         for (div = 1; div <= 1024; div++) {
 363                                 if ((host->max_clk / div) <= clock)
 364                                         break;
 365                         }
 366
 367                         /*
 368                          * Set Programmable Clock Mode in the Clock
 369                          * Control register.
 370                          */
 371                         clk = SDHCI_PROG_CLOCK_MODE;
 372                         div--;
 373                 } else {
 374                         /* Version 3.00 divisors must be a multiple of 2. */
 375                         if (host->max_clk <= clock) {
 376                                 div = 1;
 377                         } else {
 378                                 for (div = 2;
 379                                      div < SDHCI_MAX_DIV_SPEC_300;
 380                                      div += 2) {
 381                                         if ((host->max_clk / div) <= clock)
 382                                                 break;
 383                                 }
 384                         }
 385                         div >>= 1;
 386                 }
 387         } else {
 388                 /* Version 2.00 divisors must be a power of 2. */
 389                 for (div = 1; div < SDHCI_MAX_DIV_SPEC_200; div *= 2) {
 390                         if ((host->max_clk / div) <= clock)
 391                                 break;
 392                 }
 393                 div >>= 1;
 394         }
 395
 396         if (host->ops && host->ops->set_clock)
 397                 host->ops->set_clock(host, div);
 398
 399         clk |= (div & SDHCI_DIV_MASK) << SDHCI_DIVIDER_SHIFT;
 400         clk |= ((div & SDHCI_DIV_HI_MASK) >> SDHCI_DIV_MASK_LEN)
 401                 << SDHCI_DIVIDER_HI_SHIFT;
 402         clk |= SDHCI_CLOCK_INT_EN;
 403         sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
 404
 405         /* Wait max 20 ms */
 406         timeout = 20;
 407         while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL))
 408                 & SDHCI_CLOCK_INT_STABLE)) {
 409                 if (timeout == 0) {
 410                         printf("%s: Internal clock never stabilised.\n",
 411                                __func__);
 412                         return -EBUSY;
 413                 }
 414                 timeout--;
 415                 udelay(1000);
 416         }
 417
 418         clk |= SDHCI_CLOCK_CARD_EN;
 419         sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
 420         return 0;
 421 }
 422
 423 static void sdhci_set_power(struct sdhci_host *host, unsigned short power)
 424 {
 425         u8 pwr = 0;
 426
 427         if (power != (unsigned short)-1) {
 428                 switch (1 << power) {
 429                 case MMC_VDD_165_195:
 430                         pwr = SDHCI_POWER_180;
 431                         break;
 432                 case MMC_VDD_29_30:
 433                 case MMC_VDD_30_31:
 434                         pwr = SDHCI_POWER_300;
 435                         break;
 436                 case MMC_VDD_32_33:
 437                 case MMC_VDD_33_34:
 438                         pwr = SDHCI_POWER_330;
 439                         break;
 440                 }
 441         }
 442
 443         if (pwr == 0) {
 444                 sdhci_writeb(host, 0, SDHCI_POWER_CONTROL);
 445                 return;
 446         }
 447
 448         pwr |= SDHCI_POWER_ON;
 449
 450         sdhci_writeb(host, pwr, SDHCI_POWER_CONTROL);
 451 }
 452
 453 #ifdef CONFIG_DM_MMC
 454 static int sdhci_set_ios(struct udevice *dev)
 455 {
 456         struct mmc *mmc = mmc_get_mmc_dev(dev);
 457 #else
 458 static int sdhci_set_ios(struct mmc *mmc)
 459 {
 460 #endif
 461         u32 ctrl;
 462         struct sdhci_host *host = mmc->priv;
 463
 464         if (host->ops && host->ops->set_control_reg)
 465                 host->ops->set_control_reg(host);
 466
 467         if (mmc->clock != host->clock)
 468                 sdhci_set_clock(mmc, mmc->clock);
 469
 470         if (mmc->clk_disable)
 471                 sdhci_set_clock(mmc, 0);
 472
 473         /* Set bus width */
 474         ctrl = sdhci_readb(host, SDHCI_HOST_CONTROL);
 475         if (mmc->bus_width == 8) {
 476                 ctrl &= ~SDHCI_CTRL_4BITBUS;
 477                 if ((SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300) ||
 478                                 (host->quirks & SDHCI_QUIRK_USE_WIDE8))
 479                         ctrl |= SDHCI_CTRL_8BITBUS;
 480         } else {
 481                 if ((SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300) ||
 482                                 (host->quirks & SDHCI_QUIRK_USE_WIDE8))
 483                         ctrl &= ~SDHCI_CTRL_8BITBUS;
 484                 if (mmc->bus_width == 4)
 485                         ctrl |= SDHCI_CTRL_4BITBUS;
 486                 else
 487                         ctrl &= ~SDHCI_CTRL_4BITBUS;
 488         }
 489
 490         if (mmc->clock > 26000000)
 491                 ctrl |= SDHCI_CTRL_HISPD;
 492         else
 493                 ctrl &= ~SDHCI_CTRL_HISPD;
 494
 495         if ((host->quirks & SDHCI_QUIRK_NO_HISPD_BIT) ||
 496             (host->quirks & SDHCI_QUIRK_BROKEN_HISPD_MODE))
 497                 ctrl &= ~SDHCI_CTRL_HISPD;
 498
 499         sdhci_writeb(host, ctrl, SDHCI_HOST_CONTROL);
 500
 501         /* If available, call the driver specific "post" set_ios() function */
 502         if (host->ops && host->ops->set_ios_post)
 503                 host->ops->set_ios_post(host);
 504
 505         return 0;
 506 }
 507
 508 static int sdhci_init(struct mmc *mmc)
 509 {
 510         struct sdhci_host *host = mmc->priv;
 511
 512         sdhci_reset(host, SDHCI_RESET_ALL);
 513
 514         if ((host->quirks & SDHCI_QUIRK_32BIT_DMA_ADDR) && !aligned_buffer) {
 515                 aligned_buffer = memalign(8, 512*1024);
 516                 if (!aligned_buffer) {
 517                         printf("%s: Aligned buffer alloc failed!!!\n",
 518                                __func__);
 519                         return -ENOMEM;
 520                 }
 521         }
 522
 523         sdhci_set_power(host, fls(mmc->cfg->voltages) - 1);
 524
 525         if (host->ops && host->ops->get_cd)
 526                 host->ops->get_cd(host);
 527
 528         /* Enable only interrupts served by the SD controller */
 529         sdhci_writel(host, SDHCI_INT_DATA_MASK | SDHCI_INT_CMD_MASK,
 530                      SDHCI_INT_ENABLE);
 531         /* Mask all sdhci interrupt sources */
 532         sdhci_writel(host, 0x0, SDHCI_SIGNAL_ENABLE);
 533
 534         return 0;
 535 }
 536
 537 #ifdef CONFIG_DM_MMC
 538 int sdhci_probe(struct udevice *dev)
 539 {
 540         struct mmc *mmc = mmc_get_mmc_dev(dev);
 541
 542         return sdhci_init(mmc);
 543 }
 544
 545 const struct dm_mmc_ops sdhci_ops = {
 546         .send_cmd       = sdhci_send_command,
 547         .set_ios        = sdhci_set_ios,
 548 #ifdef MMC_SUPPORTS_TUNING
 549         .execute_tuning = sdhci_execute_tuning,
 550 #endif
 551 };
 552 #else
 553 static const struct mmc_ops sdhci_ops = {
 554         .send_cmd       = sdhci_send_command,
 555         .set_ios        = sdhci_set_ios,
 556         .init           = sdhci_init,
 557 };
 558 #endif
 559
 560 int sdhci_setup_cfg(struct mmc_config *cfg, struct sdhci_host *host,
 561                 u32 f_max, u32 f_min)
 562 {
 563         u32 caps, caps_1 = 0;
 564
 565         caps = sdhci_readl(host, SDHCI_CAPABILITIES);
 566
 567 #ifdef CONFIG_MMC_SDHCI_SDMA
 568         if (!(caps & SDHCI_CAN_DO_SDMA)) {
 569                 printf("%s: Your controller doesn't support SDMA!!\n",
 570                        __func__);
 571                 return -EINVAL;
 572         }
 573 #endif
 574         if (host->quirks & SDHCI_QUIRK_REG32_RW)
 575                 host->version =
 576                         sdhci_readl(host, SDHCI_HOST_VERSION - 2) >> 16;
 577         else
 578                 host->version = sdhci_readw(host, SDHCI_HOST_VERSION);
 579
 580         cfg->name = host->name;
 581 #ifndef CONFIG_DM_MMC
 582         cfg->ops = &sdhci_ops;
 583 #endif
 584
 585         /* Check whether the clock multiplier is supported or not */
 586         if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300) {
 587                 caps_1 = sdhci_readl(host, SDHCI_CAPABILITIES_1);
 588                 host->clk_mul = (caps_1 & SDHCI_CLOCK_MUL_MASK) >>
 589                                 SDHCI_CLOCK_MUL_SHIFT;
 590         }
 591
 592         if (host->max_clk == 0) {
 593                 if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300)
 594                         host->max_clk = (caps & SDHCI_CLOCK_V3_BASE_MASK) >>
 595                                 SDHCI_CLOCK_BASE_SHIFT;
 596                 else
 597                         host->max_clk = (caps & SDHCI_CLOCK_BASE_MASK) >>
 598                                 SDHCI_CLOCK_BASE_SHIFT;
 599                 host->max_clk *= 1000000;
 600                 if (host->clk_mul)
 601                         host->max_clk *= host->clk_mul;
 602         }
 603         if (host->max_clk == 0) {
 604                 printf("%s: Hardware doesn't specify base clock frequency\n",
 605                        __func__);
 606                 return -EINVAL;
 607         }
 608         if (f_max && (f_max < host->max_clk))
 609                 cfg->f_max = f_max;
 610         else
 611                 cfg->f_max = host->max_clk;
 612         if (f_min)
 613                 cfg->f_min = f_min;
 614         else {
 615                 if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300)
 616                         cfg->f_min = cfg->f_max / SDHCI_MAX_DIV_SPEC_300;
 617                 else
 618                         cfg->f_min = cfg->f_max / SDHCI_MAX_DIV_SPEC_200;
 619         }
 620         cfg->voltages = 0;
 621         if (caps & SDHCI_CAN_VDD_330)
 622                 cfg->voltages |= MMC_VDD_32_33 | MMC_VDD_33_34;
 623         if (caps & SDHCI_CAN_VDD_300)
 624                 cfg->voltages |= MMC_VDD_29_30 | MMC_VDD_30_31;
 625         if (caps & SDHCI_CAN_VDD_180)
 626                 cfg->voltages |= MMC_VDD_165_195;
 627
 628         if (host->quirks & SDHCI_QUIRK_BROKEN_VOLTAGE)
 629                 cfg->voltages |= host->voltages;
 630
 631         cfg->host_caps |= MMC_MODE_HS | MMC_MODE_HS_52MHz | MMC_MODE_4BIT;
 632
 633         /* Since Host Controller Version3.0 */
 634         if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300) {
 635                 if (!(caps & SDHCI_CAN_DO_8BIT))
 636                         cfg->host_caps &= ~MMC_MODE_8BIT;
 637         }
 638
 639         if (host->quirks & SDHCI_QUIRK_BROKEN_HISPD_MODE) {
 640                 cfg->host_caps &= ~MMC_MODE_HS;
 641                 cfg->host_caps &= ~MMC_MODE_HS_52MHz;
 642         }
 643
 644         if (SDHCI_GET_VERSION(host) >= SDHCI_SPEC_300)
 645                 caps_1 = sdhci_readl(host, SDHCI_CAPABILITIES_1);
 646
 647         if (!(cfg->voltages & MMC_VDD_165_195) ||
 648             (host->quirks & SDHCI_QUIRK_NO_1_8_V))
 649                 caps_1 &= ~(SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 |
 650                             SDHCI_SUPPORT_DDR50);
 651
 652         if (caps_1 & (SDHCI_SUPPORT_SDR104 | SDHCI_SUPPORT_SDR50 |
 653                       SDHCI_SUPPORT_DDR50))
 654                 cfg->host_caps |= MMC_CAP(UHS_SDR12) | MMC_CAP(UHS_SDR25);
 655
 656         if (caps_1 & SDHCI_SUPPORT_SDR104) {
 657                 cfg->host_caps |= MMC_CAP(UHS_SDR104) | MMC_CAP(UHS_SDR50);
 658                 /*
 659                  * SD3.0: SDR104 is supported so (for eMMC) the caps2
 660                  * field can be promoted to support HS200.
 661                  */
 662                 cfg->host_caps |= MMC_CAP(MMC_HS_200);
 663         } else if (caps_1 & SDHCI_SUPPORT_SDR50) {
 664                 cfg->host_caps |= MMC_CAP(UHS_SDR50);
 665         }
 666
 667         if (caps_1 & SDHCI_SUPPORT_DDR50)
 668                 cfg->host_caps |= MMC_CAP(UHS_DDR50);
 669
 670         if (host->host_caps)
 671                 cfg->host_caps |= host->host_caps;
 672
 673         cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
 674
 675         return 0;
 676 }
 677
 678 #ifdef CONFIG_BLK
 679 int sdhci_bind(struct udevice *dev, struct mmc *mmc, struct mmc_config *cfg)
 680 {
 681         return mmc_bind(dev, mmc, cfg);
 682 }
 683 #else
 684 int add_sdhci(struct sdhci_host *host, u32 f_max, u32 f_min)
 685 {
 686         int ret;
 687
 688         ret = sdhci_setup_cfg(&host->cfg, host, f_max, f_min);
 689         if (ret)
 690                 return ret;
 691
 692         host->mmc = mmc_create(&host->cfg, host);
 693         if (host->mmc == NULL) {
 694                 printf("%s: mmc create fail!\n", __func__);
 695                 return -ENOMEM;
 696         }
 697
 698         return 0;
 699 }
 700 #endif