drivers/mmc/sunxi_mmc.c

   1 /*
   2  * (C) Copyright 2007-2011
   3  * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
   4  * Aaron <leafy.myeh@allwinnertech.com>
   5  *
   6  * MMC driver for allwinner sunxi platform.
   7  *
   8  * SPDX-License-Identifier:     GPL-2.0+
   9  */
  10
  11 #include <common.h>
  12 #include <dm.h>
  13 #include <errno.h>
  14 #include <malloc.h>
  15 #include <mmc.h>
  16 #include <asm/io.h>
  17 #include <asm/arch/clock.h>
  18 #include <asm/arch/cpu.h>
  19 #include <asm/arch/gpio.h>
  20 #include <asm/arch/mmc.h>
  21 #include <asm-generic/gpio.h>
  22
  23 struct sunxi_mmc_plat {
  24         struct mmc_config cfg;
  25         struct mmc mmc;
  26 };
  27
  28 struct sunxi_mmc_priv {
  29         unsigned mmc_no;
  30         uint32_t *mclkreg;
  31         unsigned fatal_err;
  32         struct gpio_desc cd_gpio;       /* Change Detect GPIO */
  33         struct sunxi_mmc *reg;
  34         struct mmc_config cfg;
  35 };
  36
  37 #if !CONFIG_IS_ENABLED(DM_MMC)
  38 /* support 4 mmc hosts */
  39 struct sunxi_mmc_priv mmc_host[4];
  40
  41 static int sunxi_mmc_getcd_gpio(int sdc_no)
  42 {
  43         switch (sdc_no) {
  44         case 0: return sunxi_name_to_gpio(CONFIG_MMC0_CD_PIN);
  45         case 1: return sunxi_name_to_gpio(CONFIG_MMC1_CD_PIN);
  46         case 2: return sunxi_name_to_gpio(CONFIG_MMC2_CD_PIN);
  47         case 3: return sunxi_name_to_gpio(CONFIG_MMC3_CD_PIN);
  48         }
  49         return -EINVAL;
  50 }
  51
  52 static int mmc_resource_init(int sdc_no)
  53 {
  54         struct sunxi_mmc_priv *priv = &mmc_host[sdc_no];
  55         struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
  56         int cd_pin, ret = 0;
  57
  58         debug("init mmc %d resource\n", sdc_no);
  59
  60         switch (sdc_no) {
  61         case 0:
  62                 priv->reg = (struct sunxi_mmc *)SUNXI_MMC0_BASE;
  63                 priv->mclkreg = &ccm->sd0_clk_cfg;
  64                 break;
  65         case 1:
  66                 priv->reg = (struct sunxi_mmc *)SUNXI_MMC1_BASE;
  67                 priv->mclkreg = &ccm->sd1_clk_cfg;
  68                 break;
  69         case 2:
  70                 priv->reg = (struct sunxi_mmc *)SUNXI_MMC2_BASE;
  71                 priv->mclkreg = &ccm->sd2_clk_cfg;
  72                 break;
  73         case 3:
  74                 priv->reg = (struct sunxi_mmc *)SUNXI_MMC3_BASE;
  75                 priv->mclkreg = &ccm->sd3_clk_cfg;
  76                 break;
  77         default:
  78                 printf("Wrong mmc number %d\n", sdc_no);
  79                 return -1;
  80         }
  81         priv->mmc_no = sdc_no;
  82
  83         cd_pin = sunxi_mmc_getcd_gpio(sdc_no);
  84         if (cd_pin >= 0) {
  85                 ret = gpio_request(cd_pin, "mmc_cd");
  86                 if (!ret) {
  87                         sunxi_gpio_set_pull(cd_pin, SUNXI_GPIO_PULL_UP);
  88                         ret = gpio_direction_input(cd_pin);
  89                 }
  90         }
  91
  92         return ret;
  93 }
  94 #endif
  95
  96 static int mmc_set_mod_clk(struct sunxi_mmc_priv *priv, unsigned int hz)
  97 {
  98         unsigned int pll, pll_hz, div, n, oclk_dly, sclk_dly;
  99
 100         if (hz <= 24000000) {
 101                 pll = CCM_MMC_CTRL_OSCM24;
 102                 pll_hz = 24000000;
 103         } else {
 104 #ifdef CONFIG_MACH_SUN9I
 105                 pll = CCM_MMC_CTRL_PLL_PERIPH0;
 106                 pll_hz = clock_get_pll4_periph0();
 107 #else
 108                 pll = CCM_MMC_CTRL_PLL6;
 109                 pll_hz = clock_get_pll6();
 110 #endif
 111         }
 112
 113         div = pll_hz / hz;
 114         if (pll_hz % hz)
 115                 div++;
 116
 117         n = 0;
 118         while (div > 16) {
 119                 n++;
 120                 div = (div + 1) / 2;
 121         }
 122
 123         if (n > 3) {
 124                 printf("mmc %u error cannot set clock to %u\n", priv->mmc_no,
 125                        hz);
 126                 return -1;
 127         }
 128
 129         /* determine delays */
 130         if (hz <= 400000) {
 131                 oclk_dly = 0;
 132                 sclk_dly = 0;
 133         } else if (hz <= 25000000) {
 134                 oclk_dly = 0;
 135                 sclk_dly = 5;
 136 #ifdef CONFIG_MACH_SUN9I
 137         } else if (hz <= 50000000) {
 138                 oclk_dly = 5;
 139                 sclk_dly = 4;
 140         } else {
 141                 /* hz > 50000000 */
 142                 oclk_dly = 2;
 143                 sclk_dly = 4;
 144 #else
 145         } else if (hz <= 50000000) {
 146                 oclk_dly = 3;
 147                 sclk_dly = 4;
 148         } else {
 149                 /* hz > 50000000 */
 150                 oclk_dly = 1;
 151                 sclk_dly = 4;
 152 #endif
 153         }
 154
 155         writel(CCM_MMC_CTRL_ENABLE | pll | CCM_MMC_CTRL_SCLK_DLY(sclk_dly) |
 156                CCM_MMC_CTRL_N(n) | CCM_MMC_CTRL_OCLK_DLY(oclk_dly) |
 157                CCM_MMC_CTRL_M(div), priv->mclkreg);
 158
 159         debug("mmc %u set mod-clk req %u parent %u n %u m %u rate %u\n",
 160               priv->mmc_no, hz, pll_hz, 1u << n, div, pll_hz / (1u << n) / div);
 161
 162         return 0;
 163 }
 164
 165 static int mmc_update_clk(struct sunxi_mmc_priv *priv)
 166 {
 167         unsigned int cmd;
 168         unsigned timeout_msecs = 2000;
 169
 170         cmd = SUNXI_MMC_CMD_START |
 171               SUNXI_MMC_CMD_UPCLK_ONLY |
 172               SUNXI_MMC_CMD_WAIT_PRE_OVER;
 173         writel(cmd, &priv->reg->cmd);
 174         while (readl(&priv->reg->cmd) & SUNXI_MMC_CMD_START) {
 175                 if (!timeout_msecs--)
 176                         return -1;
 177                 udelay(1000);
 178         }
 179
 180         /* clock update sets various irq status bits, clear these */
 181         writel(readl(&priv->reg->rint), &priv->reg->rint);
 182
 183         return 0;
 184 }
 185
 186 static int mmc_config_clock(struct sunxi_mmc_priv *priv, struct mmc *mmc)
 187 {
 188         unsigned rval = readl(&priv->reg->clkcr);
 189
 190         /* Disable Clock */
 191         rval &= ~SUNXI_MMC_CLK_ENABLE;
 192         writel(rval, &priv->reg->clkcr);
 193         if (mmc_update_clk(priv))
 194                 return -1;
 195
 196         /* Set mod_clk to new rate */
 197         if (mmc_set_mod_clk(priv, mmc->clock))
 198                 return -1;
 199
 200         /* Clear internal divider */
 201         rval &= ~SUNXI_MMC_CLK_DIVIDER_MASK;
 202         writel(rval, &priv->reg->clkcr);
 203
 204         /* Re-enable Clock */
 205         rval |= SUNXI_MMC_CLK_ENABLE;
 206         writel(rval, &priv->reg->clkcr);
 207         if (mmc_update_clk(priv))
 208                 return -1;
 209
 210         return 0;
 211 }
 212
 213 static int sunxi_mmc_set_ios_common(struct sunxi_mmc_priv *priv,
 214                                     struct mmc *mmc)
 215 {
 216         debug("set ios: bus_width: %x, clock: %d\n",
 217               mmc->bus_width, mmc->clock);
 218
 219         /* Change clock first */
 220         if (mmc->clock && mmc_config_clock(priv, mmc) != 0) {
 221                 priv->fatal_err = 1;
 222                 return -EINVAL;
 223         }
 224
 225         /* Change bus width */
 226         if (mmc->bus_width == 8)
 227                 writel(0x2, &priv->reg->width);
 228         else if (mmc->bus_width == 4)
 229                 writel(0x1, &priv->reg->width);
 230         else
 231                 writel(0x0, &priv->reg->width);
 232
 233         return 0;
 234 }
 235
 236 #if !CONFIG_IS_ENABLED(DM_MMC)
 237 static int sunxi_mmc_core_init(struct mmc *mmc)
 238 {
 239         struct sunxi_mmc_priv *priv = mmc->priv;
 240
 241         /* Reset controller */
 242         writel(SUNXI_MMC_GCTRL_RESET, &priv->reg->gctrl);
 243         udelay(1000);
 244
 245         return 0;
 246 }
 247 #endif
 248
 249 static int mmc_trans_data_by_cpu(struct sunxi_mmc_priv *priv, struct mmc *mmc,
 250                                  struct mmc_data *data)
 251 {
 252         const int reading = !!(data->flags & MMC_DATA_READ);
 253         const uint32_t status_bit = reading ? SUNXI_MMC_STATUS_FIFO_EMPTY :
 254                                               SUNXI_MMC_STATUS_FIFO_FULL;
 255         unsigned i;
 256         unsigned *buff = (unsigned int *)(reading ? data->dest : data->src);
 257         unsigned byte_cnt = data->blocksize * data->blocks;
 258         unsigned timeout_usecs = (byte_cnt >> 8) * 1000;
 259         if (timeout_usecs < 2000000)
 260                 timeout_usecs = 2000000;
 261
 262         /* Always read / write data through the CPU */
 263         setbits_le32(&priv->reg->gctrl, SUNXI_MMC_GCTRL_ACCESS_BY_AHB);
 264
 265         for (i = 0; i < (byte_cnt >> 2); i++) {
 266                 while (readl(&priv->reg->status) & status_bit) {
 267                         if (!timeout_usecs--)
 268                                 return -1;
 269                         udelay(1);
 270                 }
 271
 272                 if (reading)
 273                         buff[i] = readl(&priv->reg->fifo);
 274                 else
 275                         writel(buff[i], &priv->reg->fifo);
 276         }
 277
 278         return 0;
 279 }
 280
 281 static int mmc_rint_wait(struct sunxi_mmc_priv *priv, struct mmc *mmc,
 282                          uint timeout_msecs, uint done_bit, const char *what)
 283 {
 284         unsigned int status;
 285
 286         do {
 287                 status = readl(&priv->reg->rint);
 288                 if (!timeout_msecs-- ||
 289                     (status & SUNXI_MMC_RINT_INTERRUPT_ERROR_BIT)) {
 290                         debug("%s timeout %x\n", what,
 291                               status & SUNXI_MMC_RINT_INTERRUPT_ERROR_BIT);
 292                         return -ETIMEDOUT;
 293                 }
 294                 udelay(1000);
 295         } while (!(status & done_bit));
 296
 297         return 0;
 298 }
 299
 300 static int sunxi_mmc_send_cmd_common(struct sunxi_mmc_priv *priv,
 301                                      struct mmc *mmc, struct mmc_cmd *cmd,
 302                                      struct mmc_data *data)
 303 {
 304         unsigned int cmdval = SUNXI_MMC_CMD_START;
 305         unsigned int timeout_msecs;
 306         int error = 0;
 307         unsigned int status = 0;
 308         unsigned int bytecnt = 0;
 309
 310         if (priv->fatal_err)
 311                 return -1;
 312         if (cmd->resp_type & MMC_RSP_BUSY)
 313                 debug("mmc cmd %d check rsp busy\n", cmd->cmdidx);
 314         if (cmd->cmdidx == 12)
 315                 return 0;
 316
 317         if (!cmd->cmdidx)
 318                 cmdval |= SUNXI_MMC_CMD_SEND_INIT_SEQ;
 319         if (cmd->resp_type & MMC_RSP_PRESENT)
 320                 cmdval |= SUNXI_MMC_CMD_RESP_EXPIRE;
 321         if (cmd->resp_type & MMC_RSP_136)
 322                 cmdval |= SUNXI_MMC_CMD_LONG_RESPONSE;
 323         if (cmd->resp_type & MMC_RSP_CRC)
 324                 cmdval |= SUNXI_MMC_CMD_CHK_RESPONSE_CRC;
 325
 326         if (data) {
 327                 if ((u32)(long)data->dest & 0x3) {
 328                         error = -1;
 329                         goto out;
 330                 }
 331
 332                 cmdval |= SUNXI_MMC_CMD_DATA_EXPIRE|SUNXI_MMC_CMD_WAIT_PRE_OVER;
 333                 if (data->flags & MMC_DATA_WRITE)
 334                         cmdval |= SUNXI_MMC_CMD_WRITE;
 335                 if (data->blocks > 1)
 336                         cmdval |= SUNXI_MMC_CMD_AUTO_STOP;
 337                 writel(data->blocksize, &priv->reg->blksz);
 338                 writel(data->blocks * data->blocksize, &priv->reg->bytecnt);
 339         }
 340
 341         debug("mmc %d, cmd %d(0x%08x), arg 0x%08x\n", priv->mmc_no,
 342               cmd->cmdidx, cmdval | cmd->cmdidx, cmd->cmdarg);
 343         writel(cmd->cmdarg, &priv->reg->arg);
 344
 345         if (!data)
 346                 writel(cmdval | cmd->cmdidx, &priv->reg->cmd);
 347
 348         /*
 349          * transfer data and check status
 350          * STATREG[2] : FIFO empty
 351          * STATREG[3] : FIFO full
 352          */
 353         if (data) {
 354                 int ret = 0;
 355
 356                 bytecnt = data->blocksize * data->blocks;
 357                 debug("trans data %d bytes\n", bytecnt);
 358                 writel(cmdval | cmd->cmdidx, &priv->reg->cmd);
 359                 ret = mmc_trans_data_by_cpu(priv, mmc, data);
 360                 if (ret) {
 361                         error = readl(&priv->reg->rint) &
 362                                 SUNXI_MMC_RINT_INTERRUPT_ERROR_BIT;
 363                         error = -ETIMEDOUT;
 364                         goto out;
 365                 }
 366         }
 367
 368         error = mmc_rint_wait(priv, mmc, 1000, SUNXI_MMC_RINT_COMMAND_DONE,
 369                               "cmd");
 370         if (error)
 371                 goto out;
 372
 373         if (data) {
 374                 timeout_msecs = 120;
 375                 debug("cacl timeout %x msec\n", timeout_msecs);
 376                 error = mmc_rint_wait(priv, mmc, timeout_msecs,
 377                                       data->blocks > 1 ?
 378                                       SUNXI_MMC_RINT_AUTO_COMMAND_DONE :
 379                                       SUNXI_MMC_RINT_DATA_OVER,
 380                                       "data");
 381                 if (error)
 382                         goto out;
 383         }
 384
 385         if (cmd->resp_type & MMC_RSP_BUSY) {
 386                 timeout_msecs = 2000;
 387                 do {
 388                         status = readl(&priv->reg->status);
 389                         if (!timeout_msecs--) {
 390                                 debug("busy timeout\n");
 391                                 error = -ETIMEDOUT;
 392                                 goto out;
 393                         }
 394                         udelay(1000);
 395                 } while (status & SUNXI_MMC_STATUS_CARD_DATA_BUSY);
 396         }
 397
 398         if (cmd->resp_type & MMC_RSP_136) {
 399                 cmd->response[0] = readl(&priv->reg->resp3);
 400                 cmd->response[1] = readl(&priv->reg->resp2);
 401                 cmd->response[2] = readl(&priv->reg->resp1);
 402                 cmd->response[3] = readl(&priv->reg->resp0);
 403                 debug("mmc resp 0x%08x 0x%08x 0x%08x 0x%08x\n",
 404                       cmd->response[3], cmd->response[2],
 405                       cmd->response[1], cmd->response[0]);
 406         } else {
 407                 cmd->response[0] = readl(&priv->reg->resp0);
 408                 debug("mmc resp 0x%08x\n", cmd->response[0]);
 409         }
 410 out:
 411         if (error < 0) {
 412                 writel(SUNXI_MMC_GCTRL_RESET, &priv->reg->gctrl);
 413                 mmc_update_clk(priv);
 414         }
 415         writel(0xffffffff, &priv->reg->rint);
 416         writel(readl(&priv->reg->gctrl) | SUNXI_MMC_GCTRL_FIFO_RESET,
 417                &priv->reg->gctrl);
 418
 419         return error;
 420 }
 421
 422 #if !CONFIG_IS_ENABLED(DM_MMC)
 423 static int sunxi_mmc_set_ios_legacy(struct mmc *mmc)
 424 {
 425         struct sunxi_mmc_priv *priv = mmc->priv;
 426
 427         return sunxi_mmc_set_ios_common(priv, mmc);
 428 }
 429
 430 static int sunxi_mmc_send_cmd_legacy(struct mmc *mmc, struct mmc_cmd *cmd,
 431                                      struct mmc_data *data)
 432 {
 433         struct sunxi_mmc_priv *priv = mmc->priv;
 434
 435         return sunxi_mmc_send_cmd_common(priv, mmc, cmd, data);
 436 }
 437
 438 static int sunxi_mmc_getcd_legacy(struct mmc *mmc)
 439 {
 440         struct sunxi_mmc_priv *priv = mmc->priv;
 441         int cd_pin;
 442
 443         cd_pin = sunxi_mmc_getcd_gpio(priv->mmc_no);
 444         if (cd_pin < 0)
 445                 return 1;
 446
 447         return !gpio_get_value(cd_pin);
 448 }
 449
 450 static const struct mmc_ops sunxi_mmc_ops = {
 451         .send_cmd       = sunxi_mmc_send_cmd_legacy,
 452         .set_ios        = sunxi_mmc_set_ios_legacy,
 453         .init           = sunxi_mmc_core_init,
 454         .getcd          = sunxi_mmc_getcd_legacy,
 455 };
 456
 457 struct mmc *sunxi_mmc_init(int sdc_no)
 458 {
 459         struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
 460         struct sunxi_mmc_priv *priv = &mmc_host[sdc_no];
 461         struct mmc_config *cfg = &priv->cfg;
 462         int ret;
 463
 464         memset(priv, '\0', sizeof(struct sunxi_mmc_priv));
 465
 466         cfg->name = "SUNXI SD/MMC";
 467         cfg->ops  = &sunxi_mmc_ops;
 468
 469         cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
 470         cfg->host_caps = MMC_MODE_4BIT;
 471 #if defined(CONFIG_MACH_SUN50I) || defined(CONFIG_MACH_SUN8I)
 472         if (sdc_no == 2)
 473                 cfg->host_caps = MMC_MODE_8BIT;
 474 #endif
 475         cfg->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
 476         cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
 477
 478         cfg->f_min = 400000;
 479         cfg->f_max = 52000000;
 480
 481         if (mmc_resource_init(sdc_no) != 0)
 482                 return NULL;
 483
 484         /* config ahb clock */
 485         debug("init mmc %d clock and io\n", sdc_no);
 486         setbits_le32(&ccm->ahb_gate0, 1 << AHB_GATE_OFFSET_MMC(sdc_no));
 487
 488 #ifdef CONFIG_SUNXI_GEN_SUN6I
 489         /* unassert reset */
 490         setbits_le32(&ccm->ahb_reset0_cfg, 1 << AHB_RESET_OFFSET_MMC(sdc_no));
 491 #endif
 492 #if defined(CONFIG_MACH_SUN9I)
 493         /* sun9i has a mmc-common module, also set the gate and reset there */
 494         writel(SUNXI_MMC_COMMON_CLK_GATE | SUNXI_MMC_COMMON_RESET,
 495                SUNXI_MMC_COMMON_BASE + 4 * sdc_no);
 496 #endif
 497         ret = mmc_set_mod_clk(priv, 24000000);
 498         if (ret)
 499                 return NULL;
 500
 501         return mmc_create(cfg, mmc_host);
 502 }
 503 #else
 504
 505 static int sunxi_mmc_set_ios(struct udevice *dev)
 506 {
 507         struct sunxi_mmc_plat *plat = dev_get_platdata(dev);
 508         struct sunxi_mmc_priv *priv = dev_get_priv(dev);
 509
 510         return sunxi_mmc_set_ios_common(priv, &plat->mmc);
 511 }
 512
 513 static int sunxi_mmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
 514                               struct mmc_data *data)
 515 {
 516         struct sunxi_mmc_plat *plat = dev_get_platdata(dev);
 517         struct sunxi_mmc_priv *priv = dev_get_priv(dev);
 518
 519         return sunxi_mmc_send_cmd_common(priv, &plat->mmc, cmd, data);
 520 }
 521
 522 static int sunxi_mmc_getcd(struct udevice *dev)
 523 {
 524         struct sunxi_mmc_priv *priv = dev_get_priv(dev);
 525
 526         if (dm_gpio_is_valid(&priv->cd_gpio))
 527                 return dm_gpio_get_value(&priv->cd_gpio);
 528
 529         return 1;
 530 }
 531
 532 static const struct dm_mmc_ops sunxi_mmc_ops = {
 533         .send_cmd       = sunxi_mmc_send_cmd,
 534         .set_ios        = sunxi_mmc_set_ios,
 535         .get_cd         = sunxi_mmc_getcd,
 536 };
 537
 538 static int sunxi_mmc_probe(struct udevice *dev)
 539 {
 540         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
 541         struct sunxi_mmc_plat *plat = dev_get_platdata(dev);
 542         struct sunxi_mmc_priv *priv = dev_get_priv(dev);
 543         struct mmc_config *cfg = &plat->cfg;
 544         struct ofnode_phandle_args args;
 545         u32 *gate_reg;
 546         int bus_width, ret;
 547
 548         cfg->name = dev->name;
 549         bus_width = dev_read_u32_default(dev, "bus-width", 1);
 550
 551         cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
 552         cfg->host_caps = 0;
 553         if (bus_width == 8)
 554                 cfg->host_caps |= MMC_MODE_8BIT;
 555         if (bus_width >= 4)
 556                 cfg->host_caps |= MMC_MODE_4BIT;
 557         cfg->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
 558         cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
 559
 560         cfg->f_min = 400000;
 561         cfg->f_max = 52000000;
 562
 563         priv->reg = (void *)dev_read_addr(dev);
 564
 565         /* We don't have a sunxi clock driver so find the clock address here */
 566         ret = dev_read_phandle_with_args(dev, "clocks", "#clock-cells", 0,
 567                                           1, &args);
 568         if (ret)
 569                 return ret;
 570         priv->mclkreg = (u32 *)ofnode_get_addr(args.node);
 571
 572         ret = dev_read_phandle_with_args(dev, "clocks", "#clock-cells", 0,
 573                                           0, &args);
 574         if (ret)
 575                 return ret;
 576         gate_reg = (u32 *)ofnode_get_addr(args.node);
 577         setbits_le32(gate_reg, 1 << args.args[0]);
 578         priv->mmc_no = args.args[0] - 8;
 579
 580         ret = mmc_set_mod_clk(priv, 24000000);
 581         if (ret)
 582                 return ret;
 583
 584         /* This GPIO is optional */
 585         if (!gpio_request_by_name(dev, "cd-gpios", 0, &priv->cd_gpio,
 586                                   GPIOD_IS_IN)) {
 587                 int cd_pin = gpio_get_number(&priv->cd_gpio);
 588
 589                 sunxi_gpio_set_pull(cd_pin, SUNXI_GPIO_PULL_UP);
 590         }
 591
 592         upriv->mmc = &plat->mmc;
 593
 594         /* Reset controller */
 595         writel(SUNXI_MMC_GCTRL_RESET, &priv->reg->gctrl);
 596         udelay(1000);
 597
 598         return 0;
 599 }
 600
 601 static int sunxi_mmc_bind(struct udevice *dev)
 602 {
 603         struct sunxi_mmc_plat *plat = dev_get_platdata(dev);
 604
 605         return mmc_bind(dev, &plat->mmc, &plat->cfg);
 606 }
 607
 608 static const struct udevice_id sunxi_mmc_ids[] = {
 609         { .compatible = "allwinner,sun5i-a13-mmc" },
 610         { }
 611 };
 612
 613 U_BOOT_DRIVER(sunxi_mmc_drv) = {
 614         .name           = "sunxi_mmc",
 615         .id             = UCLASS_MMC,
 616         .of_match       = sunxi_mmc_ids,
 617         .bind           = sunxi_mmc_bind,
 618         .probe          = sunxi_mmc_probe,
 619         .ops            = &sunxi_mmc_ops,
 620         .platdata_auto_alloc_size = sizeof(struct sunxi_mmc_plat),
 621         .priv_auto_alloc_size = sizeof(struct sunxi_mmc_priv),
 622 };
 623 #endif