drivers/mmc/sunxi_mmc.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2007-2011
   4  * Allwinner Technology Co., Ltd. <www.allwinnertech.com>
   5  * Aaron <[email protected]>
   6  *
   7  * MMC driver for allwinner sunxi platform.
   8  */
   9
  10 #include <common.h>
  11 #include <dm.h>
  12 #include <errno.h>
  13 #include <log.h>
  14 #include <malloc.h>
  15 #include <mmc.h>
  16 #include <clk.h>
  17 #include <reset.h>
  18 #include <asm/io.h>
  19 #include <asm/arch/clock.h>
  20 #include <asm/arch/cpu.h>
  21 #include <asm/arch/gpio.h>
  22 #include <asm/arch/mmc.h>
  23 #include <asm-generic/gpio.h>
  24 #include <linux/delay.h>
  25
  26 #ifdef CONFIG_DM_MMC
  27 struct sunxi_mmc_variant {
  28         u16 mclk_offset;
  29 };
  30 #endif
  31
  32 struct sunxi_mmc_plat {
  33         struct mmc_config cfg;
  34         struct mmc mmc;
  35 };
  36
  37 struct sunxi_mmc_priv {
  38         unsigned mmc_no;
  39         uint32_t *mclkreg;
  40         unsigned fatal_err;
  41         struct gpio_desc cd_gpio;       /* Change Detect GPIO */
  42         int cd_inverted;                /* Inverted Card Detect */
  43         struct sunxi_mmc *reg;
  44         struct mmc_config cfg;
  45 #ifdef CONFIG_DM_MMC
  46         const struct sunxi_mmc_variant *variant;
  47 #endif
  48 };
  49
  50 #if !CONFIG_IS_ENABLED(DM_MMC)
  51 /* support 4 mmc hosts */
  52 struct sunxi_mmc_priv mmc_host[4];
  53
  54 static int sunxi_mmc_getcd_gpio(int sdc_no)
  55 {
  56         switch (sdc_no) {
  57         case 0: return sunxi_name_to_gpio(CONFIG_MMC0_CD_PIN);
  58         case 1: return sunxi_name_to_gpio(CONFIG_MMC1_CD_PIN);
  59         case 2: return sunxi_name_to_gpio(CONFIG_MMC2_CD_PIN);
  60         case 3: return sunxi_name_to_gpio(CONFIG_MMC3_CD_PIN);
  61         }
  62         return -EINVAL;
  63 }
  64
  65 static int mmc_resource_init(int sdc_no)
  66 {
  67         struct sunxi_mmc_priv *priv = &mmc_host[sdc_no];
  68         struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
  69         int cd_pin, ret = 0;
  70
  71         debug("init mmc %d resource\n", sdc_no);
  72
  73         switch (sdc_no) {
  74         case 0:
  75                 priv->reg = (struct sunxi_mmc *)SUNXI_MMC0_BASE;
  76                 priv->mclkreg = &ccm->sd0_clk_cfg;
  77                 break;
  78         case 1:
  79                 priv->reg = (struct sunxi_mmc *)SUNXI_MMC1_BASE;
  80                 priv->mclkreg = &ccm->sd1_clk_cfg;
  81                 break;
  82         case 2:
  83                 priv->reg = (struct sunxi_mmc *)SUNXI_MMC2_BASE;
  84                 priv->mclkreg = &ccm->sd2_clk_cfg;
  85                 break;
  86 #ifdef SUNXI_MMC3_BASE
  87         case 3:
  88                 priv->reg = (struct sunxi_mmc *)SUNXI_MMC3_BASE;
  89                 priv->mclkreg = &ccm->sd3_clk_cfg;
  90                 break;
  91 #endif
  92         default:
  93                 printf("Wrong mmc number %d\n", sdc_no);
  94                 return -1;
  95         }
  96         priv->mmc_no = sdc_no;
  97
  98         cd_pin = sunxi_mmc_getcd_gpio(sdc_no);
  99         if (cd_pin >= 0) {
 100                 ret = gpio_request(cd_pin, "mmc_cd");
 101                 if (!ret) {
 102                         sunxi_gpio_set_pull(cd_pin, SUNXI_GPIO_PULL_UP);
 103                         ret = gpio_direction_input(cd_pin);
 104                 }
 105         }
 106
 107         return ret;
 108 }
 109 #endif
 110
 111 static int mmc_set_mod_clk(struct sunxi_mmc_priv *priv, unsigned int hz)
 112 {
 113         unsigned int pll, pll_hz, div, n, oclk_dly, sclk_dly;
 114         bool new_mode = true;
 115         bool calibrate = false;
 116         u32 val = 0;
 117
 118         if (!IS_ENABLED(CONFIG_MMC_SUNXI_HAS_NEW_MODE))
 119                 new_mode = false;
 120
 121         /* A83T support new mode only on eMMC */
 122         if (IS_ENABLED(CONFIG_MACH_SUN8I_A83T) && priv->mmc_no != 2)
 123                 new_mode = false;
 124
 125 #if defined(CONFIG_MACH_SUN50I) || defined(CONFIG_MACH_SUN50I_H6)
 126         calibrate = true;
 127 #endif
 128
 129         if (hz <= 24000000) {
 130                 pll = CCM_MMC_CTRL_OSCM24;
 131                 pll_hz = 24000000;
 132         } else {
 133 #ifdef CONFIG_MACH_SUN9I
 134                 pll = CCM_MMC_CTRL_PLL_PERIPH0;
 135                 pll_hz = clock_get_pll4_periph0();
 136 #elif defined(CONFIG_MACH_SUN50I_H6)
 137                 pll = CCM_MMC_CTRL_PLL6X2;
 138                 pll_hz = clock_get_pll6() * 2;
 139 #else
 140                 pll = CCM_MMC_CTRL_PLL6;
 141                 pll_hz = clock_get_pll6();
 142 #endif
 143         }
 144
 145         div = pll_hz / hz;
 146         if (pll_hz % hz)
 147                 div++;
 148
 149         n = 0;
 150         while (div > 16) {
 151                 n++;
 152                 div = (div + 1) / 2;
 153         }
 154
 155         if (n > 3) {
 156                 printf("mmc %u error cannot set clock to %u\n", priv->mmc_no,
 157                        hz);
 158                 return -1;
 159         }
 160
 161         /* determine delays */
 162         if (hz <= 400000) {
 163                 oclk_dly = 0;
 164                 sclk_dly = 0;
 165         } else if (hz <= 25000000) {
 166                 oclk_dly = 0;
 167                 sclk_dly = 5;
 168 #ifdef CONFIG_MACH_SUN9I
 169         } else if (hz <= 52000000) {
 170                 oclk_dly = 5;
 171                 sclk_dly = 4;
 172         } else {
 173                 /* hz > 52000000 */
 174                 oclk_dly = 2;
 175                 sclk_dly = 4;
 176 #else
 177         } else if (hz <= 52000000) {
 178                 oclk_dly = 3;
 179                 sclk_dly = 4;
 180         } else {
 181                 /* hz > 52000000 */
 182                 oclk_dly = 1;
 183                 sclk_dly = 4;
 184 #endif
 185         }
 186
 187         if (new_mode) {
 188 #ifdef CONFIG_MMC_SUNXI_HAS_NEW_MODE
 189 #ifdef CONFIG_MMC_SUNXI_HAS_MODE_SWITCH
 190                 val = CCM_MMC_CTRL_MODE_SEL_NEW;
 191 #endif
 192                 setbits_le32(&priv->reg->ntsr, SUNXI_MMC_NTSR_MODE_SEL_NEW);
 193 #endif
 194         } else if (!calibrate) {
 195                 /*
 196                  * Use hardcoded delay values if controller doesn't support
 197                  * calibration
 198                  */
 199                 val = CCM_MMC_CTRL_OCLK_DLY(oclk_dly) |
 200                         CCM_MMC_CTRL_SCLK_DLY(sclk_dly);
 201         }
 202
 203         writel(CCM_MMC_CTRL_ENABLE| pll | CCM_MMC_CTRL_N(n) |
 204                CCM_MMC_CTRL_M(div) | val, priv->mclkreg);
 205
 206         debug("mmc %u set mod-clk req %u parent %u n %u m %u rate %u\n",
 207               priv->mmc_no, hz, pll_hz, 1u << n, div, pll_hz / (1u << n) / div);
 208
 209         return 0;
 210 }
 211
 212 static int mmc_update_clk(struct sunxi_mmc_priv *priv)
 213 {
 214         unsigned int cmd;
 215         unsigned timeout_msecs = 2000;
 216         unsigned long start = get_timer(0);
 217
 218         cmd = SUNXI_MMC_CMD_START |
 219               SUNXI_MMC_CMD_UPCLK_ONLY |
 220               SUNXI_MMC_CMD_WAIT_PRE_OVER;
 221
 222         writel(cmd, &priv->reg->cmd);
 223         while (readl(&priv->reg->cmd) & SUNXI_MMC_CMD_START) {
 224                 if (get_timer(start) > timeout_msecs)
 225                         return -1;
 226         }
 227
 228         /* clock update sets various irq status bits, clear these */
 229         writel(readl(&priv->reg->rint), &priv->reg->rint);
 230
 231         return 0;
 232 }
 233
 234 static int mmc_config_clock(struct sunxi_mmc_priv *priv, struct mmc *mmc)
 235 {
 236         unsigned rval = readl(&priv->reg->clkcr);
 237
 238         /* Disable Clock */
 239         rval &= ~SUNXI_MMC_CLK_ENABLE;
 240         writel(rval, &priv->reg->clkcr);
 241         if (mmc_update_clk(priv))
 242                 return -1;
 243
 244         /* Set mod_clk to new rate */
 245         if (mmc_set_mod_clk(priv, mmc->clock))
 246                 return -1;
 247
 248         /* Clear internal divider */
 249         rval &= ~SUNXI_MMC_CLK_DIVIDER_MASK;
 250         writel(rval, &priv->reg->clkcr);
 251
 252 #if defined(CONFIG_MACH_SUN50I) || defined(CONFIG_MACH_SUN50I_H6)
 253         /* A64 supports calibration of delays on MMC controller and we
 254          * have to set delay of zero before starting calibration.
 255          * Allwinner BSP driver sets a delay only in the case of
 256          * using HS400 which is not supported by mainline U-Boot or
 257          * Linux at the moment
 258          */
 259         writel(SUNXI_MMC_CAL_DL_SW_EN, &priv->reg->samp_dl);
 260 #endif
 261
 262         /* Re-enable Clock */
 263         rval |= SUNXI_MMC_CLK_ENABLE;
 264         writel(rval, &priv->reg->clkcr);
 265         if (mmc_update_clk(priv))
 266                 return -1;
 267
 268         return 0;
 269 }
 270
 271 static int sunxi_mmc_set_ios_common(struct sunxi_mmc_priv *priv,
 272                                     struct mmc *mmc)
 273 {
 274         debug("set ios: bus_width: %x, clock: %d\n",
 275               mmc->bus_width, mmc->clock);
 276
 277         /* Change clock first */
 278         if (mmc->clock && mmc_config_clock(priv, mmc) != 0) {
 279                 priv->fatal_err = 1;
 280                 return -EINVAL;
 281         }
 282
 283         /* Change bus width */
 284         if (mmc->bus_width == 8)
 285                 writel(0x2, &priv->reg->width);
 286         else if (mmc->bus_width == 4)
 287                 writel(0x1, &priv->reg->width);
 288         else
 289                 writel(0x0, &priv->reg->width);
 290
 291         return 0;
 292 }
 293
 294 #if !CONFIG_IS_ENABLED(DM_MMC)
 295 static int sunxi_mmc_core_init(struct mmc *mmc)
 296 {
 297         struct sunxi_mmc_priv *priv = mmc->priv;
 298
 299         /* Reset controller */
 300         writel(SUNXI_MMC_GCTRL_RESET, &priv->reg->gctrl);
 301         udelay(1000);
 302
 303         return 0;
 304 }
 305 #endif
 306
 307 static int mmc_trans_data_by_cpu(struct sunxi_mmc_priv *priv, struct mmc *mmc,
 308                                  struct mmc_data *data)
 309 {
 310         const int reading = !!(data->flags & MMC_DATA_READ);
 311         const uint32_t status_bit = reading ? SUNXI_MMC_STATUS_FIFO_EMPTY :
 312                                               SUNXI_MMC_STATUS_FIFO_FULL;
 313         unsigned i;
 314         unsigned *buff = (unsigned int *)(reading ? data->dest : data->src);
 315         unsigned byte_cnt = data->blocksize * data->blocks;
 316         unsigned timeout_msecs = byte_cnt >> 8;
 317         unsigned long  start;
 318
 319         if (timeout_msecs < 2000)
 320                 timeout_msecs = 2000;
 321
 322         /* Always read / write data through the CPU */
 323         setbits_le32(&priv->reg->gctrl, SUNXI_MMC_GCTRL_ACCESS_BY_AHB);
 324
 325         start = get_timer(0);
 326
 327         for (i = 0; i < (byte_cnt >> 2); i++) {
 328                 while (readl(&priv->reg->status) & status_bit) {
 329                         if (get_timer(start) > timeout_msecs)
 330                                 return -1;
 331                 }
 332
 333                 if (reading)
 334                         buff[i] = readl(&priv->reg->fifo);
 335                 else
 336                         writel(buff[i], &priv->reg->fifo);
 337         }
 338
 339         return 0;
 340 }
 341
 342 static int mmc_rint_wait(struct sunxi_mmc_priv *priv, struct mmc *mmc,
 343                          uint timeout_msecs, uint done_bit, const char *what)
 344 {
 345         unsigned int status;
 346         unsigned long start = get_timer(0);
 347
 348         do {
 349                 status = readl(&priv->reg->rint);
 350                 if ((get_timer(start) > timeout_msecs) ||
 351                     (status & SUNXI_MMC_RINT_INTERRUPT_ERROR_BIT)) {
 352                         debug("%s timeout %x\n", what,
 353                               status & SUNXI_MMC_RINT_INTERRUPT_ERROR_BIT);
 354                         return -ETIMEDOUT;
 355                 }
 356         } while (!(status & done_bit));
 357
 358         return 0;
 359 }
 360
 361 static int sunxi_mmc_send_cmd_common(struct sunxi_mmc_priv *priv,
 362                                      struct mmc *mmc, struct mmc_cmd *cmd,
 363                                      struct mmc_data *data)
 364 {
 365         unsigned int cmdval = SUNXI_MMC_CMD_START;
 366         unsigned int timeout_msecs;
 367         int error = 0;
 368         unsigned int status = 0;
 369         unsigned int bytecnt = 0;
 370
 371         if (priv->fatal_err)
 372                 return -1;
 373         if (cmd->resp_type & MMC_RSP_BUSY)
 374                 debug("mmc cmd %d check rsp busy\n", cmd->cmdidx);
 375         if (cmd->cmdidx == 12)
 376                 return 0;
 377
 378         if (!cmd->cmdidx)
 379                 cmdval |= SUNXI_MMC_CMD_SEND_INIT_SEQ;
 380         if (cmd->resp_type & MMC_RSP_PRESENT)
 381                 cmdval |= SUNXI_MMC_CMD_RESP_EXPIRE;
 382         if (cmd->resp_type & MMC_RSP_136)
 383                 cmdval |= SUNXI_MMC_CMD_LONG_RESPONSE;
 384         if (cmd->resp_type & MMC_RSP_CRC)
 385                 cmdval |= SUNXI_MMC_CMD_CHK_RESPONSE_CRC;
 386
 387         if (data) {
 388                 if ((u32)(long)data->dest & 0x3) {
 389                         error = -1;
 390                         goto out;
 391                 }
 392
 393                 cmdval |= SUNXI_MMC_CMD_DATA_EXPIRE|SUNXI_MMC_CMD_WAIT_PRE_OVER;
 394                 if (data->flags & MMC_DATA_WRITE)
 395                         cmdval |= SUNXI_MMC_CMD_WRITE;
 396                 if (data->blocks > 1)
 397                         cmdval |= SUNXI_MMC_CMD_AUTO_STOP;
 398                 writel(data->blocksize, &priv->reg->blksz);
 399                 writel(data->blocks * data->blocksize, &priv->reg->bytecnt);
 400         }
 401
 402         debug("mmc %d, cmd %d(0x%08x), arg 0x%08x\n", priv->mmc_no,
 403               cmd->cmdidx, cmdval | cmd->cmdidx, cmd->cmdarg);
 404         writel(cmd->cmdarg, &priv->reg->arg);
 405
 406         if (!data)
 407                 writel(cmdval | cmd->cmdidx, &priv->reg->cmd);
 408
 409         /*
 410          * transfer data and check status
 411          * STATREG[2] : FIFO empty
 412          * STATREG[3] : FIFO full
 413          */
 414         if (data) {
 415                 int ret = 0;
 416
 417                 bytecnt = data->blocksize * data->blocks;
 418                 debug("trans data %d bytes\n", bytecnt);
 419                 writel(cmdval | cmd->cmdidx, &priv->reg->cmd);
 420                 ret = mmc_trans_data_by_cpu(priv, mmc, data);
 421                 if (ret) {
 422                         error = readl(&priv->reg->rint) &
 423                                 SUNXI_MMC_RINT_INTERRUPT_ERROR_BIT;
 424                         error = -ETIMEDOUT;
 425                         goto out;
 426                 }
 427         }
 428
 429         error = mmc_rint_wait(priv, mmc, 1000, SUNXI_MMC_RINT_COMMAND_DONE,
 430                               "cmd");
 431         if (error)
 432                 goto out;
 433
 434         if (data) {
 435                 timeout_msecs = 120;
 436                 debug("cacl timeout %x msec\n", timeout_msecs);
 437                 error = mmc_rint_wait(priv, mmc, timeout_msecs,
 438                                       data->blocks > 1 ?
 439                                       SUNXI_MMC_RINT_AUTO_COMMAND_DONE :
 440                                       SUNXI_MMC_RINT_DATA_OVER,
 441                                       "data");
 442                 if (error)
 443                         goto out;
 444         }
 445
 446         if (cmd->resp_type & MMC_RSP_BUSY) {
 447                 unsigned long start = get_timer(0);
 448                 timeout_msecs = 2000;
 449
 450                 do {
 451                         status = readl(&priv->reg->status);
 452                         if (get_timer(start) > timeout_msecs) {
 453                                 debug("busy timeout\n");
 454                                 error = -ETIMEDOUT;
 455                                 goto out;
 456                         }
 457                 } while (status & SUNXI_MMC_STATUS_CARD_DATA_BUSY);
 458         }
 459
 460         if (cmd->resp_type & MMC_RSP_136) {
 461                 cmd->response[0] = readl(&priv->reg->resp3);
 462                 cmd->response[1] = readl(&priv->reg->resp2);
 463                 cmd->response[2] = readl(&priv->reg->resp1);
 464                 cmd->response[3] = readl(&priv->reg->resp0);
 465                 debug("mmc resp 0x%08x 0x%08x 0x%08x 0x%08x\n",
 466                       cmd->response[3], cmd->response[2],
 467                       cmd->response[1], cmd->response[0]);
 468         } else {
 469                 cmd->response[0] = readl(&priv->reg->resp0);
 470                 debug("mmc resp 0x%08x\n", cmd->response[0]);
 471         }
 472 out:
 473         if (error < 0) {
 474                 writel(SUNXI_MMC_GCTRL_RESET, &priv->reg->gctrl);
 475                 mmc_update_clk(priv);
 476         }
 477         writel(0xffffffff, &priv->reg->rint);
 478         writel(readl(&priv->reg->gctrl) | SUNXI_MMC_GCTRL_FIFO_RESET,
 479                &priv->reg->gctrl);
 480
 481         return error;
 482 }
 483
 484 #if !CONFIG_IS_ENABLED(DM_MMC)
 485 static int sunxi_mmc_set_ios_legacy(struct mmc *mmc)
 486 {
 487         struct sunxi_mmc_priv *priv = mmc->priv;
 488
 489         return sunxi_mmc_set_ios_common(priv, mmc);
 490 }
 491
 492 static int sunxi_mmc_send_cmd_legacy(struct mmc *mmc, struct mmc_cmd *cmd,
 493                                      struct mmc_data *data)
 494 {
 495         struct sunxi_mmc_priv *priv = mmc->priv;
 496
 497         return sunxi_mmc_send_cmd_common(priv, mmc, cmd, data);
 498 }
 499
 500 static int sunxi_mmc_getcd_legacy(struct mmc *mmc)
 501 {
 502         struct sunxi_mmc_priv *priv = mmc->priv;
 503         int cd_pin;
 504
 505         cd_pin = sunxi_mmc_getcd_gpio(priv->mmc_no);
 506         if (cd_pin < 0)
 507                 return 1;
 508
 509         return !gpio_get_value(cd_pin);
 510 }
 511
 512 static const struct mmc_ops sunxi_mmc_ops = {
 513         .send_cmd       = sunxi_mmc_send_cmd_legacy,
 514         .set_ios        = sunxi_mmc_set_ios_legacy,
 515         .init           = sunxi_mmc_core_init,
 516         .getcd          = sunxi_mmc_getcd_legacy,
 517 };
 518
 519 struct mmc *sunxi_mmc_init(int sdc_no)
 520 {
 521         struct sunxi_ccm_reg *ccm = (struct sunxi_ccm_reg *)SUNXI_CCM_BASE;
 522         struct sunxi_mmc_priv *priv = &mmc_host[sdc_no];
 523         struct mmc_config *cfg = &priv->cfg;
 524         int ret;
 525
 526         memset(priv, '\0', sizeof(struct sunxi_mmc_priv));
 527
 528         cfg->name = "SUNXI SD/MMC";
 529         cfg->ops  = &sunxi_mmc_ops;
 530
 531         cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
 532         cfg->host_caps = MMC_MODE_4BIT;
 533 #if defined(CONFIG_MACH_SUN50I) || defined(CONFIG_MACH_SUN8I) || defined(CONFIG_MACH_SUN50I_H6)
 534         if (sdc_no == 2)
 535                 cfg->host_caps = MMC_MODE_8BIT;
 536 #endif
 537         cfg->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
 538         cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
 539
 540         cfg->f_min = 400000;
 541         cfg->f_max = 52000000;
 542
 543         if (mmc_resource_init(sdc_no) != 0)
 544                 return NULL;
 545
 546         /* config ahb clock */
 547         debug("init mmc %d clock and io\n", sdc_no);
 548 #if !defined(CONFIG_MACH_SUN50I_H6)
 549         setbits_le32(&ccm->ahb_gate0, 1 << AHB_GATE_OFFSET_MMC(sdc_no));
 550
 551 #ifdef CONFIG_SUNXI_GEN_SUN6I
 552         /* unassert reset */
 553         setbits_le32(&ccm->ahb_reset0_cfg, 1 << AHB_RESET_OFFSET_MMC(sdc_no));
 554 #endif
 555 #if defined(CONFIG_MACH_SUN9I)
 556         /* sun9i has a mmc-common module, also set the gate and reset there */
 557         writel(SUNXI_MMC_COMMON_CLK_GATE | SUNXI_MMC_COMMON_RESET,
 558                SUNXI_MMC_COMMON_BASE + 4 * sdc_no);
 559 #endif
 560 #else /* CONFIG_MACH_SUN50I_H6 */
 561         setbits_le32(&ccm->sd_gate_reset, 1 << sdc_no);
 562         /* unassert reset */
 563         setbits_le32(&ccm->sd_gate_reset, 1 << (RESET_SHIFT + sdc_no));
 564 #endif
 565         ret = mmc_set_mod_clk(priv, 24000000);
 566         if (ret)
 567                 return NULL;
 568
 569         return mmc_create(cfg, priv);
 570 }
 571 #else
 572
 573 static int sunxi_mmc_set_ios(struct udevice *dev)
 574 {
 575         struct sunxi_mmc_plat *plat = dev_get_plat(dev);
 576         struct sunxi_mmc_priv *priv = dev_get_priv(dev);
 577
 578         return sunxi_mmc_set_ios_common(priv, &plat->mmc);
 579 }
 580
 581 static int sunxi_mmc_send_cmd(struct udevice *dev, struct mmc_cmd *cmd,
 582                               struct mmc_data *data)
 583 {
 584         struct sunxi_mmc_plat *plat = dev_get_plat(dev);
 585         struct sunxi_mmc_priv *priv = dev_get_priv(dev);
 586
 587         return sunxi_mmc_send_cmd_common(priv, &plat->mmc, cmd, data);
 588 }
 589
 590 static int sunxi_mmc_getcd(struct udevice *dev)
 591 {
 592         struct sunxi_mmc_priv *priv = dev_get_priv(dev);
 593
 594         if (dm_gpio_is_valid(&priv->cd_gpio)) {
 595                 int cd_state = dm_gpio_get_value(&priv->cd_gpio);
 596
 597                 return cd_state ^ priv->cd_inverted;
 598         }
 599         return 1;
 600 }
 601
 602 static const struct dm_mmc_ops sunxi_mmc_ops = {
 603         .send_cmd       = sunxi_mmc_send_cmd,
 604         .set_ios        = sunxi_mmc_set_ios,
 605         .get_cd         = sunxi_mmc_getcd,
 606 };
 607
 608 static int sunxi_mmc_probe(struct udevice *dev)
 609 {
 610         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
 611         struct sunxi_mmc_plat *plat = dev_get_plat(dev);
 612         struct sunxi_mmc_priv *priv = dev_get_priv(dev);
 613         struct reset_ctl_bulk reset_bulk;
 614         struct clk gate_clk;
 615         struct mmc_config *cfg = &plat->cfg;
 616         struct ofnode_phandle_args args;
 617         u32 *ccu_reg;
 618         int bus_width, ret;
 619
 620         cfg->name = dev->name;
 621         bus_width = dev_read_u32_default(dev, "bus-width", 1);
 622
 623         cfg->voltages = MMC_VDD_32_33 | MMC_VDD_33_34;
 624         cfg->host_caps = 0;
 625         if (bus_width == 8)
 626                 cfg->host_caps |= MMC_MODE_8BIT;
 627         if (bus_width >= 4)
 628                 cfg->host_caps |= MMC_MODE_4BIT;
 629         cfg->host_caps |= MMC_MODE_HS_52MHz | MMC_MODE_HS;
 630         cfg->b_max = CONFIG_SYS_MMC_MAX_BLK_COUNT;
 631
 632         cfg->f_min = 400000;
 633         cfg->f_max = 52000000;
 634
 635         priv->reg = (void *)dev_read_addr(dev);
 636         priv->variant =
 637                 (const struct sunxi_mmc_variant *)dev_get_driver_data(dev);
 638
 639         /* We don't have a sunxi clock driver so find the clock address here */
 640         ret = dev_read_phandle_with_args(dev, "clocks", "#clock-cells", 0,
 641                                           1, &args);
 642         if (ret)
 643                 return ret;
 644         ccu_reg = (u32 *)ofnode_get_addr(args.node);
 645
 646         priv->mmc_no = ((uintptr_t)priv->reg - SUNXI_MMC0_BASE) / 0x1000;
 647         priv->mclkreg = (void *)ccu_reg +
 648                         (priv->variant->mclk_offset + (priv->mmc_no * 4));
 649
 650         ret = clk_get_by_name(dev, "ahb", &gate_clk);
 651         if (!ret)
 652                 clk_enable(&gate_clk);
 653
 654         ret = reset_get_bulk(dev, &reset_bulk);
 655         if (!ret)
 656                 reset_deassert_bulk(&reset_bulk);
 657
 658         ret = mmc_set_mod_clk(priv, 24000000);
 659         if (ret)
 660                 return ret;
 661
 662         /* This GPIO is optional */
 663         if (!dev_read_bool(dev, "non-removable") &&
 664             !gpio_request_by_name(dev, "cd-gpios", 0, &priv->cd_gpio,
 665                                   GPIOD_IS_IN)) {
 666                 int cd_pin = gpio_get_number(&priv->cd_gpio);
 667
 668                 sunxi_gpio_set_pull(cd_pin, SUNXI_GPIO_PULL_UP);
 669         }
 670
 671         /* Check if card detect is inverted */
 672         priv->cd_inverted = dev_read_bool(dev, "cd-inverted");
 673
 674         upriv->mmc = &plat->mmc;
 675
 676         /* Reset controller */
 677         writel(SUNXI_MMC_GCTRL_RESET, &priv->reg->gctrl);
 678         udelay(1000);
 679
 680         return 0;
 681 }
 682
 683 static int sunxi_mmc_bind(struct udevice *dev)
 684 {
 685         struct sunxi_mmc_plat *plat = dev_get_plat(dev);
 686
 687         return mmc_bind(dev, &plat->mmc, &plat->cfg);
 688 }
 689
 690 static const struct sunxi_mmc_variant sun4i_a10_variant = {
 691         .mclk_offset = 0x88,
 692 };
 693
 694 static const struct sunxi_mmc_variant sun9i_a80_variant = {
 695         .mclk_offset = 0x410,
 696 };
 697
 698 static const struct sunxi_mmc_variant sun50i_h6_variant = {
 699         .mclk_offset = 0x830,
 700 };
 701
 702 static const struct udevice_id sunxi_mmc_ids[] = {
 703         {
 704           .compatible = "allwinner,sun4i-a10-mmc",
 705           .data = (ulong)&sun4i_a10_variant,
 706         },
 707         {
 708           .compatible = "allwinner,sun5i-a13-mmc",
 709           .data = (ulong)&sun4i_a10_variant,
 710         },
 711         {
 712           .compatible = "allwinner,sun7i-a20-mmc",
 713           .data = (ulong)&sun4i_a10_variant,
 714         },
 715         {
 716           .compatible = "allwinner,sun8i-a83t-emmc",
 717           .data = (ulong)&sun4i_a10_variant,
 718         },
 719         {
 720           .compatible = "allwinner,sun9i-a80-mmc",
 721           .data = (ulong)&sun9i_a80_variant,
 722         },
 723         {
 724           .compatible = "allwinner,sun50i-a64-mmc",
 725           .data = (ulong)&sun4i_a10_variant,
 726         },
 727         {
 728           .compatible = "allwinner,sun50i-a64-emmc",
 729           .data = (ulong)&sun4i_a10_variant,
 730         },
 731         {
 732           .compatible = "allwinner,sun50i-h6-mmc",
 733           .data = (ulong)&sun50i_h6_variant,
 734         },
 735         {
 736           .compatible = "allwinner,sun50i-h6-emmc",
 737           .data = (ulong)&sun50i_h6_variant,
 738         },
 739         { /* sentinel */ }
 740 };
 741
 742 U_BOOT_DRIVER(sunxi_mmc_drv) = {
 743         .name           = "sunxi_mmc",
 744         .id             = UCLASS_MMC,
 745         .of_match       = sunxi_mmc_ids,
 746         .bind           = sunxi_mmc_bind,
 747         .probe          = sunxi_mmc_probe,
 748         .ops            = &sunxi_mmc_ops,
 749         .plat_auto      = sizeof(struct sunxi_mmc_plat),
 750         .priv_auto      = sizeof(struct sunxi_mmc_priv),
 751 };
 752 #endif