drivers/mmc/zynq_sdhci.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * (C) Copyright 2013 - 2022, Xilinx, Inc.
   4  * (C) Copyright 2022, Advanced Micro Devices, Inc.
   5  *
   6  * Xilinx Zynq SD Host Controller Interface
   7  */
   8
   9 #include <clk.h>
  10 #include <common.h>
  11 #include <dm.h>
  12 #include <fdtdec.h>
  13 #include <linux/delay.h>
  14 #include "mmc_private.h"
  15 #include <log.h>
  16 #include <reset.h>
  17 #include <dm/device_compat.h>
  18 #include <linux/err.h>
  19 #include <linux/libfdt.h>
  20 #include <linux/iopoll.h>
  21 #include <asm/types.h>
  22 #include <linux/math64.h>
  23 #include <asm/cache.h>
  24 #include <malloc.h>
  25 #include <sdhci.h>
  26 #include <zynqmp_firmware.h>
  27
  28 #define SDHCI_ARASAN_ITAPDLY_REGISTER   0xF0F8
  29 #define SDHCI_ARASAN_ITAPDLY_SEL_MASK   GENMASK(7, 0)
  30 #define SDHCI_ARASAN_OTAPDLY_REGISTER   0xF0FC
  31 #define SDHCI_ARASAN_OTAPDLY_SEL_MASK   GENMASK(5, 0)
  32 #define SDHCI_ITAPDLY_CHGWIN            BIT(9)
  33 #define SDHCI_ITAPDLY_ENABLE            BIT(8)
  34 #define SDHCI_OTAPDLY_ENABLE            BIT(6)
  35
  36 #define SDHCI_TUNING_LOOP_COUNT         40
  37 #define MMC_BANK2                       0x2
  38
  39 #define SD_DLL_CTRL                     0xFF180358
  40 #define SD_ITAP_DLY                     0xFF180314
  41 #define SD_OTAP_DLY                     0xFF180318
  42 #define SD0_DLL_RST                     BIT(2)
  43 #define SD1_DLL_RST                     BIT(18)
  44 #define SD0_ITAPCHGWIN                  BIT(9)
  45 #define SD1_ITAPCHGWIN                  BIT(25)
  46 #define SD0_ITAPDLYENA                  BIT(8)
  47 #define SD1_ITAPDLYENA                  BIT(24)
  48 #define SD0_ITAPDLYSEL_MASK             GENMASK(7, 0)
  49 #define SD1_ITAPDLYSEL_MASK             GENMASK(23, 16)
  50 #define SD0_OTAPDLYSEL_MASK             GENMASK(5, 0)
  51 #define SD1_OTAPDLYSEL_MASK             GENMASK(21, 16)
  52
  53 #define MIN_PHY_CLK_HZ                  50000000
  54
  55 #define PHY_CTRL_REG1                   0x270
  56 #define PHY_CTRL_ITAPDLY_ENA_MASK       BIT(0)
  57 #define PHY_CTRL_ITAPDLY_SEL_MASK       GENMASK(5, 1)
  58 #define PHY_CTRL_ITAPDLY_SEL_SHIFT      1
  59 #define PHY_CTRL_ITAP_CHG_WIN_MASK      BIT(6)
  60 #define PHY_CTRL_OTAPDLY_ENA_MASK       BIT(8)
  61 #define PHY_CTRL_OTAPDLY_SEL_MASK       GENMASK(15, 12)
  62 #define PHY_CTRL_OTAPDLY_SEL_SHIFT      12
  63 #define PHY_CTRL_STRB_SEL_MASK          GENMASK(23, 16)
  64 #define PHY_CTRL_STRB_SEL_SHIFT         16
  65 #define PHY_CTRL_TEST_CTRL_MASK         GENMASK(31, 24)
  66
  67 #define PHY_CTRL_REG2                   0x274
  68 #define PHY_CTRL_EN_DLL_MASK            BIT(0)
  69 #define PHY_CTRL_DLL_RDY_MASK           BIT(1)
  70 #define PHY_CTRL_FREQ_SEL_MASK          GENMASK(6, 4)
  71 #define PHY_CTRL_FREQ_SEL_SHIFT         4
  72 #define PHY_CTRL_SEL_DLY_TX_MASK        BIT(16)
  73 #define PHY_CTRL_SEL_DLY_RX_MASK        BIT(17)
  74 #define FREQSEL_200M_170M               0x0
  75 #define FREQSEL_170M_140M               0x1
  76 #define FREQSEL_140M_110M               0x2
  77 #define FREQSEL_110M_80M                0x3
  78 #define FREQSEL_80M_50M                 0x4
  79 #define FREQSEL_275M_250M               0x5
  80 #define FREQSEL_250M_225M               0x6
  81 #define FREQSEL_225M_200M               0x7
  82 #define PHY_DLL_TIMEOUT_MS              100
  83
  84 #define VERSAL_NET_EMMC_ICLK_PHASE_DDR52_DLY_CHAIN      39
  85 #define VERSAL_NET_EMMC_ICLK_PHASE_DDR52_DLL            146
  86 #define VERSAL_NET_PHY_CTRL_STRB90_STRB180_VAL          0X77
  87
  88 struct arasan_sdhci_clk_data {
  89         int clk_phase_in[MMC_TIMING_MMC_HS400 + 1];
  90         int clk_phase_out[MMC_TIMING_MMC_HS400 + 1];
  91 };
  92
  93 struct arasan_sdhci_plat {
  94         struct mmc_config cfg;
  95         struct mmc mmc;
  96 };
  97
  98 struct arasan_sdhci_priv {
  99         struct sdhci_host *host;
 100         struct arasan_sdhci_clk_data clk_data;
 101         u32 node_id;
 102         u8 bank;
 103         u8 no_1p8;
 104         bool internal_phy_reg;
 105         struct reset_ctl_bulk resets;
 106 };
 107
 108 /* For Versal platforms zynqmp_mmio_write() won't be available */
 109 __weak int zynqmp_mmio_write(const u32 address, const u32 mask, const u32 value)
 110 {
 111         return 0;
 112 }
 113
 114 __weak int xilinx_pm_request(u32 api_id, u32 arg0, u32 arg1, u32 arg2,
 115                              u32 arg3, u32 *ret_payload)
 116 {
 117         return 0;
 118 }
 119
 120 __weak int zynqmp_pm_is_function_supported(const u32 api_id, const u32 id)
 121 {
 122         return 1;
 123 }
 124
 125 #if defined(CONFIG_ARCH_ZYNQMP) || defined(CONFIG_ARCH_VERSAL) || defined(CONFIG_ARCH_VERSAL_NET)
 126 /* Default settings for ZynqMP Clock Phases */
 127 static const u32 zynqmp_iclk_phases[] = {0, 63, 63, 0, 63,  0,
 128                                          0, 183, 54,  0, 0};
 129 static const u32 zynqmp_oclk_phases[] = {0, 72, 60, 0, 60, 72,
 130                                          135, 48, 72, 135, 0};
 131
 132 /* Default settings for Versal Clock Phases */
 133 static const u32 versal_iclk_phases[] = {0, 132, 132, 0, 132,
 134                                          0, 0, 162, 90, 0, 0};
 135 static const u32 versal_oclk_phases[] = {0,  60, 48, 0, 48, 72,
 136                                          90, 36, 60, 90, 0};
 137
 138 /* Default settings for versal-net eMMC Clock Phases */
 139 static const u32 versal_net_emmc_iclk_phases[] = {0, 0, 0, 0, 0, 0, 0, 0, 39,
 140                                                   0, 0};
 141 static const u32 versal_net_emmc_oclk_phases[] = {0, 113, 0, 0, 0, 0, 0, 0,
 142                                                   113, 79, 45};
 143
 144 static const u8 mode2timing[] = {
 145         [MMC_LEGACY] = MMC_TIMING_LEGACY,
 146         [MMC_HS] = MMC_TIMING_MMC_HS,
 147         [SD_HS] = MMC_TIMING_SD_HS,
 148         [MMC_HS_52] = MMC_TIMING_MMC_HS,
 149         [MMC_DDR_52] = MMC_TIMING_MMC_DDR52,
 150         [UHS_SDR12] = MMC_TIMING_UHS_SDR12,
 151         [UHS_SDR25] = MMC_TIMING_UHS_SDR25,
 152         [UHS_SDR50] = MMC_TIMING_UHS_SDR50,
 153         [UHS_DDR50] = MMC_TIMING_UHS_DDR50,
 154         [UHS_SDR104] = MMC_TIMING_UHS_SDR104,
 155         [MMC_HS_200] = MMC_TIMING_MMC_HS200,
 156         [MMC_HS_400] = MMC_TIMING_MMC_HS400,
 157 };
 158
 159 #if defined(CONFIG_ARCH_VERSAL_NET)
 160 /**
 161  * arasan_phy_set_delaychain - Set eMMC delay chain based Input/Output clock
 162  *
 163  * @host:       Pointer to the sdhci_host structure
 164  * @enable:     Enable or disable Delay chain based Tx and Rx clock
 165  * Return:      None
 166  *
 167  * Enable or disable eMMC delay chain based Input and Output clock in
 168  * PHY_CTRL_REG2
 169  */
 170 static void arasan_phy_set_delaychain(struct sdhci_host *host, bool enable)
 171 {
 172         u32 reg;
 173
 174         reg = sdhci_readw(host, PHY_CTRL_REG2);
 175         if (enable)
 176                 reg |= PHY_CTRL_SEL_DLY_TX_MASK | PHY_CTRL_SEL_DLY_RX_MASK;
 177         else
 178                 reg &= ~(PHY_CTRL_SEL_DLY_TX_MASK | PHY_CTRL_SEL_DLY_RX_MASK);
 179
 180         sdhci_writew(host, reg, PHY_CTRL_REG2);
 181 }
 182
 183 /**
 184  * arasan_phy_set_dll - Set eMMC DLL clock
 185  *
 186  * @host:       Pointer to the sdhci_host structure
 187  * @enable:     Enable or disable DLL clock
 188  * Return:      0 if success or timeout error
 189  *
 190  * Enable or disable eMMC DLL clock in PHY_CTRL_REG2. When DLL enable is
 191  * set, wait till DLL is locked
 192  */
 193 static int arasan_phy_set_dll(struct sdhci_host *host, bool enable)
 194 {
 195         u32 reg;
 196
 197         reg = sdhci_readw(host, PHY_CTRL_REG2);
 198         if (enable)
 199                 reg |= PHY_CTRL_EN_DLL_MASK;
 200         else
 201                 reg &= ~PHY_CTRL_EN_DLL_MASK;
 202
 203         sdhci_writew(host, reg, PHY_CTRL_REG2);
 204
 205         /* If DLL is disabled return success */
 206         if (!enable)
 207                 return 0;
 208
 209         /* If DLL is enabled wait till DLL loop is locked, which is
 210          * indicated by dll_rdy bit(bit1) in PHY_CTRL_REG2
 211          */
 212         return readl_relaxed_poll_timeout(host->ioaddr + PHY_CTRL_REG2, reg,
 213                                           (reg & PHY_CTRL_DLL_RDY_MASK),
 214                                           1000 * PHY_DLL_TIMEOUT_MS);
 215 }
 216
 217 /**
 218  * arasan_phy_dll_set_freq - Select frequency range of DLL for eMMC
 219  *
 220  * @host:       Pointer to the sdhci_host structure
 221  * @clock:      clock value
 222  * Return:      None
 223  *
 224  * Set frequency range bits based on the selected clock for eMMC
 225  */
 226 static void arasan_phy_dll_set_freq(struct sdhci_host *host, int clock)
 227 {
 228         u32 reg, freq_sel, freq;
 229
 230         freq = DIV_ROUND_CLOSEST(clock, 1000000);
 231         if (freq <= 200 && freq > 170)
 232                 freq_sel = FREQSEL_200M_170M;
 233         else if (freq <= 170 && freq > 140)
 234                 freq_sel = FREQSEL_170M_140M;
 235         else if (freq <= 140 && freq > 110)
 236                 freq_sel = FREQSEL_140M_110M;
 237         else if (freq <= 110 && freq > 80)
 238                 freq_sel = FREQSEL_110M_80M;
 239         else
 240                 freq_sel = FREQSEL_80M_50M;
 241
 242         reg = sdhci_readw(host, PHY_CTRL_REG2);
 243         reg &= ~PHY_CTRL_FREQ_SEL_MASK;
 244         reg |= (freq_sel << PHY_CTRL_FREQ_SEL_SHIFT);
 245         sdhci_writew(host, reg, PHY_CTRL_REG2);
 246 }
 247
 248 static int arasan_sdhci_config_dll(struct sdhci_host *host, unsigned int clock, bool enable)
 249 {
 250         struct mmc *mmc = (struct mmc *)host->mmc;
 251         struct arasan_sdhci_priv *priv = dev_get_priv(mmc->dev);
 252
 253         if (enable) {
 254                 if (priv->internal_phy_reg && clock >= MIN_PHY_CLK_HZ && enable)
 255                         arasan_phy_set_dll(host, 1);
 256                 return 0;
 257         }
 258
 259         if (priv->internal_phy_reg && clock >= MIN_PHY_CLK_HZ) {
 260                 sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
 261                 arasan_phy_set_dll(host, 0);
 262                 arasan_phy_set_delaychain(host, 0);
 263                 arasan_phy_dll_set_freq(host, clock);
 264                 return 0;
 265         }
 266
 267         sdhci_writew(host, 0, SDHCI_CLOCK_CONTROL);
 268         arasan_phy_set_delaychain(host, 1);
 269
 270         return 0;
 271 }
 272 #endif
 273
 274 static inline int arasan_zynqmp_set_in_tapdelay(u32 node_id, u32 itap_delay)
 275 {
 276         int ret;
 277
 278         if (IS_ENABLED(CONFIG_SPL_BUILD) || current_el() == 3) {
 279                 if (node_id == NODE_SD_0) {
 280                         ret = zynqmp_mmio_write(SD_ITAP_DLY, SD0_ITAPCHGWIN,
 281                                                 SD0_ITAPCHGWIN);
 282                         if (ret)
 283                                 return ret;
 284
 285                         ret = zynqmp_mmio_write(SD_ITAP_DLY, SD0_ITAPDLYENA,
 286                                                 SD0_ITAPDLYENA);
 287                         if (ret)
 288                                 return ret;
 289
 290                         ret = zynqmp_mmio_write(SD_ITAP_DLY, SD0_ITAPDLYSEL_MASK,
 291                                                 itap_delay);
 292                         if (ret)
 293                                 return ret;
 294
 295                         ret = zynqmp_mmio_write(SD_ITAP_DLY, SD0_ITAPCHGWIN, 0);
 296                         if (ret)
 297                                 return ret;
 298                 }
 299                 ret = zynqmp_mmio_write(SD_ITAP_DLY, SD1_ITAPCHGWIN,
 300                                         SD1_ITAPCHGWIN);
 301                 if (ret)
 302                         return ret;
 303
 304                 ret = zynqmp_mmio_write(SD_ITAP_DLY, SD1_ITAPDLYENA,
 305                                         SD1_ITAPDLYENA);
 306                 if (ret)
 307                         return ret;
 308
 309                 ret = zynqmp_mmio_write(SD_ITAP_DLY, SD1_ITAPDLYSEL_MASK,
 310                                         (itap_delay << 16));
 311                 if (ret)
 312                         return ret;
 313
 314                 ret = zynqmp_mmio_write(SD_ITAP_DLY, SD1_ITAPCHGWIN, 0);
 315                 if (ret)
 316                         return ret;
 317         } else {
 318                 return xilinx_pm_request(PM_IOCTL, node_id,
 319                                          IOCTL_SET_SD_TAPDELAY,
 320                                          PM_TAPDELAY_INPUT, itap_delay, NULL);
 321         }
 322
 323         return 0;
 324 }
 325
 326 static inline int arasan_zynqmp_set_out_tapdelay(u32 node_id, u32 otap_delay)
 327 {
 328         if (IS_ENABLED(CONFIG_SPL_BUILD) || current_el() == 3) {
 329                 if (node_id == NODE_SD_0)
 330                         return zynqmp_mmio_write(SD_OTAP_DLY,
 331                                                  SD0_OTAPDLYSEL_MASK,
 332                                                  otap_delay);
 333
 334                 return zynqmp_mmio_write(SD_OTAP_DLY, SD1_OTAPDLYSEL_MASK,
 335                                          (otap_delay << 16));
 336         } else {
 337                 return xilinx_pm_request(PM_IOCTL, node_id,
 338                                          IOCTL_SET_SD_TAPDELAY,
 339                                          PM_TAPDELAY_OUTPUT, otap_delay, NULL);
 340         }
 341 }
 342
 343 static inline int zynqmp_dll_reset(u32 node_id, u32 type)
 344 {
 345         if (IS_ENABLED(CONFIG_SPL_BUILD) || current_el() == 3) {
 346                 if (node_id == NODE_SD_0)
 347                         return zynqmp_mmio_write(SD_DLL_CTRL, SD0_DLL_RST,
 348                                                  type == PM_DLL_RESET_ASSERT ?
 349                                                  SD0_DLL_RST : 0);
 350
 351                 return zynqmp_mmio_write(SD_DLL_CTRL, SD1_DLL_RST,
 352                                          type == PM_DLL_RESET_ASSERT ?
 353                                          SD1_DLL_RST : 0);
 354         } else {
 355                 return xilinx_pm_request(PM_IOCTL, node_id,
 356                                          IOCTL_SD_DLL_RESET, type, 0, NULL);
 357         }
 358 }
 359
 360 static int arasan_zynqmp_dll_reset(struct sdhci_host *host, u32 node_id)
 361 {
 362         struct mmc *mmc = (struct mmc *)host->mmc;
 363         struct udevice *dev = mmc->dev;
 364         unsigned long timeout;
 365         int ret;
 366         u16 clk;
 367
 368         clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL);
 369         clk &= ~(SDHCI_CLOCK_CARD_EN);
 370         sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
 371
 372         /* Issue DLL Reset */
 373         ret = zynqmp_dll_reset(node_id, PM_DLL_RESET_ASSERT);
 374         if (ret) {
 375                 dev_err(dev, "dll_reset assert failed with err: %d\n", ret);
 376                 return ret;
 377         }
 378
 379         /* Allow atleast 1ms delay for proper DLL reset */
 380         mdelay(1);
 381         ret = zynqmp_dll_reset(node_id, PM_DLL_RESET_RELEASE);
 382         if (ret) {
 383                 dev_err(dev, "dll_reset release failed with err: %d\n", ret);
 384                 return ret;
 385         }
 386
 387         /* Wait max 20 ms */
 388         timeout = 100;
 389         while (!((clk = sdhci_readw(host, SDHCI_CLOCK_CONTROL))
 390                                 & SDHCI_CLOCK_INT_STABLE)) {
 391                 if (timeout == 0) {
 392                         dev_err(dev, ": Internal clock never stabilised.\n");
 393                         return -EBUSY;
 394                 }
 395                 timeout--;
 396                 udelay(1000);
 397         }
 398
 399         clk |= SDHCI_CLOCK_CARD_EN;
 400         sdhci_writew(host, clk, SDHCI_CLOCK_CONTROL);
 401
 402         return 0;
 403 }
 404
 405 static int arasan_sdhci_execute_tuning(struct mmc *mmc, u8 opcode)
 406 {
 407         struct mmc_cmd cmd;
 408         struct mmc_data data;
 409         u32 ctrl;
 410         struct sdhci_host *host;
 411         struct arasan_sdhci_priv *priv = dev_get_priv(mmc->dev);
 412         int tuning_loop_counter = SDHCI_TUNING_LOOP_COUNT;
 413
 414         dev_dbg(mmc->dev, "%s\n", __func__);
 415
 416         host = priv->host;
 417
 418         ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
 419         ctrl |= SDHCI_CTRL_EXEC_TUNING;
 420         sdhci_writew(host, ctrl, SDHCI_HOST_CONTROL2);
 421
 422         mdelay(1);
 423
 424         arasan_zynqmp_dll_reset(host, priv->node_id);
 425
 426         sdhci_writel(host, SDHCI_INT_DATA_AVAIL, SDHCI_INT_ENABLE);
 427         sdhci_writel(host, SDHCI_INT_DATA_AVAIL, SDHCI_SIGNAL_ENABLE);
 428
 429         do {
 430                 cmd.cmdidx = opcode;
 431                 cmd.resp_type = MMC_RSP_R1;
 432                 cmd.cmdarg = 0;
 433
 434                 data.blocksize = 64;
 435                 data.blocks = 1;
 436                 data.flags = MMC_DATA_READ;
 437
 438                 if (tuning_loop_counter-- == 0)
 439                         break;
 440
 441                 if (cmd.cmdidx == MMC_CMD_SEND_TUNING_BLOCK_HS200 &&
 442                     mmc->bus_width == 8)
 443                         data.blocksize = 128;
 444
 445                 sdhci_writew(host, SDHCI_MAKE_BLKSZ(SDHCI_DEFAULT_BOUNDARY_ARG,
 446                                                     data.blocksize),
 447                              SDHCI_BLOCK_SIZE);
 448                 sdhci_writew(host, data.blocks, SDHCI_BLOCK_COUNT);
 449                 sdhci_writew(host, SDHCI_TRNS_READ, SDHCI_TRANSFER_MODE);
 450
 451                 mmc_send_cmd(mmc, &cmd, NULL);
 452                 ctrl = sdhci_readw(host, SDHCI_HOST_CONTROL2);
 453
 454                 if (cmd.cmdidx == MMC_CMD_SEND_TUNING_BLOCK)
 455                         udelay(1);
 456
 457         } while (ctrl & SDHCI_CTRL_EXEC_TUNING);
 458
 459         if (tuning_loop_counter < 0) {
 460                 ctrl &= ~SDHCI_CTRL_TUNED_CLK;
 461                 sdhci_writel(host, ctrl, SDHCI_HOST_CONTROL2);
 462         }
 463
 464         if (!(ctrl & SDHCI_CTRL_TUNED_CLK)) {
 465                 printf("%s:Tuning failed\n", __func__);
 466                 return -1;
 467         }
 468
 469         udelay(1);
 470         arasan_zynqmp_dll_reset(host, priv->node_id);
 471
 472         /* Enable only interrupts served by the SD controller */
 473         sdhci_writel(host, SDHCI_INT_DATA_MASK | SDHCI_INT_CMD_MASK,
 474                      SDHCI_INT_ENABLE);
 475         /* Mask all sdhci interrupt sources */
 476         sdhci_writel(host, 0x0, SDHCI_SIGNAL_ENABLE);
 477
 478         return 0;
 479 }
 480
 481 /**
 482  * sdhci_zynqmp_sdcardclk_set_phase - Set the SD Output Clock Tap Delays
 483  *
 484  * @host:               Pointer to the sdhci_host structure.
 485  * @degrees:            The clock phase shift between 0 - 359.
 486  * Return: 0
 487  *
 488  * Set the SD Output Clock Tap Delays for Output path
 489  */
 490 static int sdhci_zynqmp_sdcardclk_set_phase(struct sdhci_host *host,
 491                                             int degrees)
 492 {
 493         struct mmc *mmc = (struct mmc *)host->mmc;
 494         struct udevice *dev = mmc->dev;
 495         struct arasan_sdhci_priv *priv = dev_get_priv(mmc->dev);
 496         u8 tap_delay, tap_max = 0;
 497         int timing = mode2timing[mmc->selected_mode];
 498         int ret;
 499
 500         /*
 501          * This is applicable for SDHCI_SPEC_300 and above
 502          * ZynqMP does not set phase for <=25MHz clock.
 503          * If degrees is zero, no need to do anything.
 504          */
 505         if (SDHCI_GET_VERSION(host) < SDHCI_SPEC_300)
 506                 return 0;
 507
 508         switch (timing) {
 509         case MMC_TIMING_MMC_HS:
 510         case MMC_TIMING_SD_HS:
 511         case MMC_TIMING_UHS_SDR25:
 512         case MMC_TIMING_UHS_DDR50:
 513         case MMC_TIMING_MMC_DDR52:
 514                 /* For 50MHz clock, 30 Taps are available */
 515                 tap_max = 30;
 516                 break;
 517         case MMC_TIMING_UHS_SDR50:
 518                 /* For 100MHz clock, 15 Taps are available */
 519                 tap_max = 15;
 520                 break;
 521         case MMC_TIMING_UHS_SDR104:
 522         case MMC_TIMING_MMC_HS200:
 523                 /* For 200MHz clock, 8 Taps are available */
 524                 tap_max = 8;
 525         default:
 526                 break;
 527         }
 528
 529         tap_delay = (degrees * tap_max) / 360;
 530
 531         /* Limit output tap_delay value to 6 bits */
 532         tap_delay &= SDHCI_ARASAN_OTAPDLY_SEL_MASK;
 533
 534         /* Set the Clock Phase */
 535         ret = arasan_zynqmp_set_out_tapdelay(priv->node_id, tap_delay);
 536         if (ret) {
 537                 dev_err(dev, "Error setting output Tap Delay\n");
 538                 return ret;
 539         }
 540
 541         /* Release DLL Reset */
 542         ret = zynqmp_dll_reset(priv->node_id, PM_DLL_RESET_RELEASE);
 543         if (ret) {
 544                 dev_err(dev, "dll_reset release failed with err: %d\n", ret);
 545                 return ret;
 546         }
 547
 548         return 0;
 549 }
 550
 551 /**
 552  * sdhci_zynqmp_sampleclk_set_phase - Set the SD Input Clock Tap Delays
 553  *
 554  * @host:               Pointer to the sdhci_host structure.
 555  * @degrees:            The clock phase shift between 0 - 359.
 556  * Return: 0
 557  *
 558  * Set the SD Input Clock Tap Delays for Input path
 559  */
 560 static int sdhci_zynqmp_sampleclk_set_phase(struct sdhci_host *host,
 561                                             int degrees)
 562 {
 563         struct mmc *mmc = (struct mmc *)host->mmc;
 564         struct udevice *dev = mmc->dev;
 565         struct arasan_sdhci_priv *priv = dev_get_priv(mmc->dev);
 566         u8 tap_delay, tap_max = 0;
 567         int timing = mode2timing[mmc->selected_mode];
 568         int ret;
 569
 570         /*
 571          * This is applicable for SDHCI_SPEC_300 and above
 572          * ZynqMP does not set phase for <=25MHz clock.
 573          * If degrees is zero, no need to do anything.
 574          */
 575         if (SDHCI_GET_VERSION(host) < SDHCI_SPEC_300)
 576                 return 0;
 577
 578         /* Assert DLL Reset */
 579         ret = zynqmp_dll_reset(priv->node_id, PM_DLL_RESET_ASSERT);
 580         if (ret) {
 581                 dev_err(dev, "dll_reset assert failed with err: %d\n", ret);
 582                 return ret;
 583         }
 584
 585         switch (timing) {
 586         case MMC_TIMING_MMC_HS:
 587         case MMC_TIMING_SD_HS:
 588         case MMC_TIMING_UHS_SDR25:
 589         case MMC_TIMING_UHS_DDR50:
 590         case MMC_TIMING_MMC_DDR52:
 591                 /* For 50MHz clock, 120 Taps are available */
 592                 tap_max = 120;
 593                 break;
 594         case MMC_TIMING_UHS_SDR50:
 595                 /* For 100MHz clock, 60 Taps are available */
 596                 tap_max = 60;
 597                 break;
 598         case MMC_TIMING_UHS_SDR104:
 599         case MMC_TIMING_MMC_HS200:
 600                 /* For 200MHz clock, 30 Taps are available */
 601                 tap_max = 30;
 602         default:
 603                 break;
 604         }
 605
 606         tap_delay = (degrees * tap_max) / 360;
 607
 608         /* Limit input tap_delay value to 8 bits */
 609         tap_delay &= SDHCI_ARASAN_ITAPDLY_SEL_MASK;
 610
 611         ret = arasan_zynqmp_set_in_tapdelay(priv->node_id, tap_delay);
 612         if (ret) {
 613                 dev_err(dev, "Error setting Input Tap Delay\n");
 614                 return ret;
 615         }
 616
 617         return 0;
 618 }
 619
 620 /**
 621  * sdhci_versal_sdcardclk_set_phase - Set the SD Output Clock Tap Delays
 622  *
 623  * @host:               Pointer to the sdhci_host structure.
 624  * @degrees:            The clock phase shift between 0 - 359.
 625  * Return: 0
 626  *
 627  * Set the SD Output Clock Tap Delays for Output path
 628  */
 629 static int sdhci_versal_sdcardclk_set_phase(struct sdhci_host *host,
 630                                             int degrees)
 631 {
 632         struct mmc *mmc = (struct mmc *)host->mmc;
 633         u8 tap_delay, tap_max = 0;
 634         int timing = mode2timing[mmc->selected_mode];
 635         u32 regval;
 636
 637         /*
 638          * This is applicable for SDHCI_SPEC_300 and above
 639          * Versal does not set phase for <=25MHz clock.
 640          * If degrees is zero, no need to do anything.
 641          */
 642         if (SDHCI_GET_VERSION(host) < SDHCI_SPEC_300)
 643                 return 0;
 644
 645         switch (timing) {
 646         case MMC_TIMING_MMC_HS:
 647         case MMC_TIMING_SD_HS:
 648         case MMC_TIMING_UHS_SDR25:
 649         case MMC_TIMING_UHS_DDR50:
 650         case MMC_TIMING_MMC_DDR52:
 651                 /* For 50MHz clock, 30 Taps are available */
 652                 tap_max = 30;
 653                 break;
 654         case MMC_TIMING_UHS_SDR50:
 655                 /* For 100MHz clock, 15 Taps are available */
 656                 tap_max = 15;
 657                 break;
 658         case MMC_TIMING_UHS_SDR104:
 659         case MMC_TIMING_MMC_HS200:
 660                 /* For 200MHz clock, 8 Taps are available */
 661                 tap_max = 8;
 662         default:
 663                 break;
 664         }
 665
 666         tap_delay = (degrees * tap_max) / 360;
 667
 668         /* Limit output tap_delay value to 6 bits */
 669         tap_delay &= SDHCI_ARASAN_OTAPDLY_SEL_MASK;
 670
 671         /* Set the Clock Phase */
 672         regval = sdhci_readl(host, SDHCI_ARASAN_OTAPDLY_REGISTER);
 673         regval |= SDHCI_OTAPDLY_ENABLE;
 674         sdhci_writel(host, regval, SDHCI_ARASAN_OTAPDLY_REGISTER);
 675         regval &= ~SDHCI_ARASAN_OTAPDLY_SEL_MASK;
 676         regval |= tap_delay;
 677         sdhci_writel(host, regval, SDHCI_ARASAN_OTAPDLY_REGISTER);
 678
 679         return 0;
 680 }
 681
 682 /**
 683  * sdhci_versal_sampleclk_set_phase - Set the SD Input Clock Tap Delays
 684  *
 685  * @host:               Pointer to the sdhci_host structure.
 686  * @degrees:            The clock phase shift between 0 - 359.
 687  * Return: 0
 688  *
 689  * Set the SD Input Clock Tap Delays for Input path
 690  */
 691 static int sdhci_versal_sampleclk_set_phase(struct sdhci_host *host,
 692                                             int degrees)
 693 {
 694         struct mmc *mmc = (struct mmc *)host->mmc;
 695         u8 tap_delay, tap_max = 0;
 696         int timing = mode2timing[mmc->selected_mode];
 697         u32 regval;
 698
 699         /*
 700          * This is applicable for SDHCI_SPEC_300 and above
 701          * Versal does not set phase for <=25MHz clock.
 702          * If degrees is zero, no need to do anything.
 703          */
 704         if (SDHCI_GET_VERSION(host) < SDHCI_SPEC_300)
 705                 return 0;
 706
 707         switch (timing) {
 708         case MMC_TIMING_MMC_HS:
 709         case MMC_TIMING_SD_HS:
 710         case MMC_TIMING_UHS_SDR25:
 711         case MMC_TIMING_UHS_DDR50:
 712         case MMC_TIMING_MMC_DDR52:
 713                 /* For 50MHz clock, 120 Taps are available */
 714                 tap_max = 120;
 715                 break;
 716         case MMC_TIMING_UHS_SDR50:
 717                 /* For 100MHz clock, 60 Taps are available */
 718                 tap_max = 60;
 719                 break;
 720         case MMC_TIMING_UHS_SDR104:
 721         case MMC_TIMING_MMC_HS200:
 722                 /* For 200MHz clock, 30 Taps are available */
 723                 tap_max = 30;
 724         default:
 725                 break;
 726         }
 727
 728         tap_delay = (degrees * tap_max) / 360;
 729
 730         /* Limit input tap_delay value to 8 bits */
 731         tap_delay &= SDHCI_ARASAN_ITAPDLY_SEL_MASK;
 732
 733         /* Set the Clock Phase */
 734         regval = sdhci_readl(host, SDHCI_ARASAN_ITAPDLY_REGISTER);
 735         regval |= SDHCI_ITAPDLY_CHGWIN;
 736         sdhci_writel(host, regval, SDHCI_ARASAN_ITAPDLY_REGISTER);
 737         regval |= SDHCI_ITAPDLY_ENABLE;
 738         sdhci_writel(host, regval, SDHCI_ARASAN_ITAPDLY_REGISTER);
 739         regval &= ~SDHCI_ARASAN_ITAPDLY_SEL_MASK;
 740         regval |= tap_delay;
 741         sdhci_writel(host, regval, SDHCI_ARASAN_ITAPDLY_REGISTER);
 742         regval &= ~SDHCI_ITAPDLY_CHGWIN;
 743         sdhci_writel(host, regval, SDHCI_ARASAN_ITAPDLY_REGISTER);
 744
 745         return 0;
 746 }
 747
 748 /**
 749  * sdhci_versal_net_emmc_sdcardclk_set_phase - Set eMMC Output Clock Tap Delays
 750  *
 751  * @host:               Pointer to the sdhci_host structure.
 752  * @degrees:            The clock phase shift between 0 - 359.
 753  * Return: 0
 754  *
 755  * Set eMMC Output Clock Tap Delays for Output path
 756  */
 757 static int sdhci_versal_net_emmc_sdcardclk_set_phase(struct sdhci_host *host, int degrees)
 758 {
 759         struct mmc *mmc = (struct mmc *)host->mmc;
 760         int timing = mode2timing[mmc->selected_mode];
 761         u8 tap_delay, tap_max = 0;
 762         u32 regval;
 763
 764         switch (timing) {
 765         case MMC_TIMING_MMC_HS:
 766         case MMC_TIMING_MMC_DDR52:
 767                 tap_max = 16;
 768                 break;
 769         case MMC_TIMING_MMC_HS200:
 770         case MMC_TIMING_MMC_HS400:
 771                  /* For 200MHz clock, 32 Taps are available */
 772                 tap_max = 32;
 773                 break;
 774         default:
 775                 break;
 776         }
 777
 778         tap_delay = (degrees * tap_max) / 360;
 779         /* Set the Clock Phase */
 780         if (tap_delay) {
 781                 regval = sdhci_readl(host, PHY_CTRL_REG1);
 782                 regval |= PHY_CTRL_OTAPDLY_ENA_MASK;
 783                 sdhci_writel(host, regval, PHY_CTRL_REG1);
 784                 regval &= ~PHY_CTRL_OTAPDLY_SEL_MASK;
 785                 regval |= tap_delay << PHY_CTRL_OTAPDLY_SEL_SHIFT;
 786                 sdhci_writel(host, regval, PHY_CTRL_REG1);
 787         }
 788
 789         return 0;
 790 }
 791
 792 /**
 793  * sdhci_versal_net_emmc_sampleclk_set_phase - Set eMMC Input Clock Tap Delays
 794  *
 795  * @host:               Pointer to the sdhci_host structure.
 796  * @degrees:            The clock phase shift between 0 - 359.
 797  * Return: 0
 798  *
 799  * Set eMMC Input Clock Tap Delays for Input path. If HS400 is selected,
 800  * set strobe90 and strobe180 in PHY_CTRL_REG1.
 801  */
 802 static int sdhci_versal_net_emmc_sampleclk_set_phase(struct sdhci_host *host, int degrees)
 803 {
 804         struct mmc *mmc = (struct mmc *)host->mmc;
 805         int timing = mode2timing[mmc->selected_mode];
 806         u8 tap_delay, tap_max = 0;
 807         u32 regval;
 808
 809         switch (timing) {
 810         case MMC_TIMING_MMC_HS:
 811         case MMC_TIMING_MMC_DDR52:
 812                 tap_max = 32;
 813                 break;
 814         case MMC_TIMING_MMC_HS400:
 815                 /* Strobe select tap point for strb90 and strb180 */
 816                 regval = sdhci_readl(host, PHY_CTRL_REG1);
 817                 regval &= ~PHY_CTRL_STRB_SEL_MASK;
 818                 regval |= VERSAL_NET_PHY_CTRL_STRB90_STRB180_VAL << PHY_CTRL_STRB_SEL_SHIFT;
 819                 sdhci_writel(host, regval, PHY_CTRL_REG1);
 820                 break;
 821         default:
 822                 break;
 823         }
 824
 825         tap_delay = (degrees * tap_max) / 360;
 826         /* Set the Clock Phase */
 827         if (tap_delay) {
 828                 regval = sdhci_readl(host, PHY_CTRL_REG1);
 829                 regval |= PHY_CTRL_ITAP_CHG_WIN_MASK;
 830                 sdhci_writel(host, regval, PHY_CTRL_REG1);
 831                 regval |= PHY_CTRL_ITAPDLY_ENA_MASK;
 832                 sdhci_writel(host, regval, PHY_CTRL_REG1);
 833                 regval &= ~PHY_CTRL_ITAPDLY_SEL_MASK;
 834                 regval |= tap_delay << PHY_CTRL_ITAPDLY_SEL_SHIFT;
 835                 sdhci_writel(host, regval, PHY_CTRL_REG1);
 836                 regval &= ~PHY_CTRL_ITAP_CHG_WIN_MASK;
 837                 sdhci_writel(host, regval, PHY_CTRL_REG1);
 838         }
 839
 840         return 0;
 841 }
 842
 843 static int arasan_sdhci_set_tapdelay(struct sdhci_host *host)
 844 {
 845         struct arasan_sdhci_priv *priv = dev_get_priv(host->mmc->dev);
 846         struct arasan_sdhci_clk_data *clk_data = &priv->clk_data;
 847         struct mmc *mmc = (struct mmc *)host->mmc;
 848         struct udevice *dev = mmc->dev;
 849         u8 timing = mode2timing[mmc->selected_mode];
 850         u32 iclk_phase = clk_data->clk_phase_in[timing];
 851         u32 oclk_phase = clk_data->clk_phase_out[timing];
 852         int ret;
 853
 854         dev_dbg(dev, "%s, host:%s, mode:%d\n", __func__, host->name, timing);
 855
 856         if (IS_ENABLED(CONFIG_ARCH_ZYNQMP) &&
 857             device_is_compatible(dev, "xlnx,zynqmp-8.9a")) {
 858                 ret = sdhci_zynqmp_sampleclk_set_phase(host, iclk_phase);
 859                 if (ret)
 860                         return ret;
 861
 862                 ret = sdhci_zynqmp_sdcardclk_set_phase(host, oclk_phase);
 863                 if (ret)
 864                         return ret;
 865         } else if (IS_ENABLED(CONFIG_ARCH_VERSAL) &&
 866                    device_is_compatible(dev, "xlnx,versal-8.9a")) {
 867                 ret = sdhci_versal_sampleclk_set_phase(host, iclk_phase);
 868                 if (ret)
 869                         return ret;
 870
 871                 ret = sdhci_versal_sdcardclk_set_phase(host, oclk_phase);
 872                 if (ret)
 873                         return ret;
 874         } else if (IS_ENABLED(CONFIG_ARCH_VERSAL_NET) &&
 875                    device_is_compatible(dev, "xlnx,versal-net-5.1-emmc")) {
 876                 if (mmc->clock >= MIN_PHY_CLK_HZ)
 877                         if (iclk_phase == VERSAL_NET_EMMC_ICLK_PHASE_DDR52_DLY_CHAIN)
 878                                 iclk_phase = VERSAL_NET_EMMC_ICLK_PHASE_DDR52_DLL;
 879
 880                 ret = sdhci_versal_net_emmc_sampleclk_set_phase(host, iclk_phase);
 881                 if (ret)
 882                         return ret;
 883
 884                 ret = sdhci_versal_net_emmc_sdcardclk_set_phase(host, oclk_phase);
 885                 if (ret)
 886                         return ret;
 887         }
 888
 889         return 0;
 890 }
 891
 892 static void arasan_dt_read_clk_phase(struct udevice *dev, unsigned char timing,
 893                                      const char *prop)
 894 {
 895         struct arasan_sdhci_priv *priv = dev_get_priv(dev);
 896         struct arasan_sdhci_clk_data *clk_data = &priv->clk_data;
 897         u32 clk_phase[2] = {0};
 898
 899         /*
 900          * Read Tap Delay values from DT, if the DT does not contain the
 901          * Tap Values then use the pre-defined values
 902          */
 903         if (dev_read_u32_array(dev, prop, &clk_phase[0], 2)) {
 904                 dev_dbg(dev, "Using predefined clock phase for %s = %d %d\n",
 905                         prop, clk_data->clk_phase_in[timing],
 906                         clk_data->clk_phase_out[timing]);
 907                 return;
 908         }
 909
 910         /* The values read are Input and Output Clock Delays in order */
 911         clk_data->clk_phase_in[timing] = clk_phase[0];
 912         clk_data->clk_phase_out[timing] = clk_phase[1];
 913 }
 914
 915 /**
 916  * arasan_dt_parse_clk_phases - Read Tap Delay values from DT
 917  *
 918  * @dev:                Pointer to our struct udevice.
 919  *
 920  * Called at initialization to parse the values of Tap Delays.
 921  */
 922 static void arasan_dt_parse_clk_phases(struct udevice *dev)
 923 {
 924         struct arasan_sdhci_priv *priv = dev_get_priv(dev);
 925         struct arasan_sdhci_clk_data *clk_data = &priv->clk_data;
 926         int i;
 927
 928         if (IS_ENABLED(CONFIG_ARCH_ZYNQMP) &&
 929             device_is_compatible(dev, "xlnx,zynqmp-8.9a")) {
 930                 for (i = 0; i <= MMC_TIMING_MMC_HS400; i++) {
 931                         clk_data->clk_phase_in[i] = zynqmp_iclk_phases[i];
 932                         clk_data->clk_phase_out[i] = zynqmp_oclk_phases[i];
 933                 }
 934
 935                 if (priv->bank == MMC_BANK2) {
 936                         clk_data->clk_phase_out[MMC_TIMING_UHS_SDR104] = 90;
 937                         clk_data->clk_phase_out[MMC_TIMING_MMC_HS200] = 90;
 938                 }
 939         }
 940
 941         if (IS_ENABLED(CONFIG_ARCH_VERSAL) &&
 942             device_is_compatible(dev, "xlnx,versal-8.9a")) {
 943                 for (i = 0; i <= MMC_TIMING_MMC_HS400; i++) {
 944                         clk_data->clk_phase_in[i] = versal_iclk_phases[i];
 945                         clk_data->clk_phase_out[i] = versal_oclk_phases[i];
 946                 }
 947         }
 948
 949         if (IS_ENABLED(CONFIG_ARCH_VERSAL_NET) &&
 950             device_is_compatible(dev, "xlnx,versal-net-5.1-emmc")) {
 951                 for (i = 0; i <= MMC_TIMING_MMC_HS400; i++) {
 952                         clk_data->clk_phase_in[i] = versal_net_emmc_iclk_phases[i];
 953                         clk_data->clk_phase_out[i] = versal_net_emmc_oclk_phases[i];
 954                 }
 955         }
 956
 957         arasan_dt_read_clk_phase(dev, MMC_TIMING_LEGACY,
 958                                  "clk-phase-legacy");
 959         arasan_dt_read_clk_phase(dev, MMC_TIMING_MMC_HS,
 960                                  "clk-phase-mmc-hs");
 961         arasan_dt_read_clk_phase(dev, MMC_TIMING_SD_HS,
 962                                  "clk-phase-sd-hs");
 963         arasan_dt_read_clk_phase(dev, MMC_TIMING_UHS_SDR12,
 964                                  "clk-phase-uhs-sdr12");
 965         arasan_dt_read_clk_phase(dev, MMC_TIMING_UHS_SDR25,
 966                                  "clk-phase-uhs-sdr25");
 967         arasan_dt_read_clk_phase(dev, MMC_TIMING_UHS_SDR50,
 968                                  "clk-phase-uhs-sdr50");
 969         arasan_dt_read_clk_phase(dev, MMC_TIMING_UHS_SDR104,
 970                                  "clk-phase-uhs-sdr104");
 971         arasan_dt_read_clk_phase(dev, MMC_TIMING_UHS_DDR50,
 972                                  "clk-phase-uhs-ddr50");
 973         arasan_dt_read_clk_phase(dev, MMC_TIMING_MMC_DDR52,
 974                                  "clk-phase-mmc-ddr52");
 975         arasan_dt_read_clk_phase(dev, MMC_TIMING_MMC_HS200,
 976                                  "clk-phase-mmc-hs200");
 977         arasan_dt_read_clk_phase(dev, MMC_TIMING_MMC_HS400,
 978                                  "clk-phase-mmc-hs400");
 979 }
 980
 981 static const struct sdhci_ops arasan_ops = {
 982         .platform_execute_tuning        = &arasan_sdhci_execute_tuning,
 983         .set_delay = &arasan_sdhci_set_tapdelay,
 984         .set_control_reg = &sdhci_set_control_reg,
 985 #if defined(CONFIG_ARCH_VERSAL_NET)
 986         .config_dll = &arasan_sdhci_config_dll,
 987 #endif
 988 };
 989 #endif
 990
 991 #if defined(CONFIG_ARCH_ZYNQMP)
 992 static int sdhci_zynqmp_set_dynamic_config(struct arasan_sdhci_priv *priv,
 993                                            struct udevice *dev)
 994 {
 995         int ret;
 996         struct clk clk;
 997         unsigned long clock, mhz;
 998
 999         ret = xilinx_pm_request(PM_REQUEST_NODE, priv->node_id,
1000                                 ZYNQMP_PM_CAPABILITY_ACCESS, ZYNQMP_PM_MAX_QOS,
1001                                 ZYNQMP_PM_REQUEST_ACK_NO, NULL);
1002         if (ret) {
1003                 dev_err(dev, "Request node failed for %d\n", priv->node_id);
1004                 return ret;
1005         }
1006
1007         ret = reset_get_bulk(dev, &priv->resets);
1008         if (ret == -ENOTSUPP || ret == -ENOENT) {
1009                 dev_err(dev, "Reset not found\n");
1010                 return 0;
1011         } else if (ret) {
1012                 dev_err(dev, "Reset failed\n");
1013                 return ret;
1014         }
1015
1016         ret = reset_assert_bulk(&priv->resets);
1017         if (ret) {
1018                 dev_err(dev, "Reset assert failed\n");
1019                 return ret;
1020         }
1021
1022         ret = zynqmp_pm_set_sd_config(priv->node_id, SD_CONFIG_FIXED, 0);
1023         if (ret) {
1024                 dev_err(dev, "SD_CONFIG_FIXED failed\n");
1025                 return ret;
1026         }
1027
1028         ret = zynqmp_pm_set_sd_config(priv->node_id, SD_CONFIG_EMMC_SEL,
1029                                       dev_read_bool(dev, "non-removable"));
1030         if (ret) {
1031                 dev_err(dev, "SD_CONFIG_EMMC_SEL failed\n");
1032                 return ret;
1033         }
1034
1035         ret = clk_get_by_index(dev, 0, &clk);
1036         if (ret < 0) {
1037                 dev_err(dev, "failed to get clock\n");
1038                 return ret;
1039         }
1040
1041         clock = clk_get_rate(&clk);
1042         if (IS_ERR_VALUE(clock)) {
1043                 dev_err(dev, "failed to get rate\n");
1044                 return clock;
1045         }
1046
1047         mhz = DIV64_U64_ROUND_UP(clock, 1000000);
1048
1049         if (mhz > 100 && mhz <= 200)
1050                 mhz = 200;
1051         else if (mhz > 50 && mhz <= 100)
1052                 mhz = 100;
1053         else if (mhz > 25 && mhz <= 50)
1054                 mhz = 50;
1055         else
1056                 mhz = 25;
1057
1058         ret = zynqmp_pm_set_sd_config(priv->node_id, SD_CONFIG_BASECLK, mhz);
1059         if (ret) {
1060                 dev_err(dev, "SD_CONFIG_BASECLK failed\n");
1061                 return ret;
1062         }
1063
1064         ret = zynqmp_pm_set_sd_config(priv->node_id, SD_CONFIG_8BIT,
1065                                       (dev_read_u32_default(dev, "bus-width", 1) == 8));
1066         if (ret) {
1067                 dev_err(dev, "SD_CONFIG_8BIT failed\n");
1068                 return ret;
1069         }
1070
1071         ret = reset_deassert_bulk(&priv->resets);
1072         if (ret) {
1073                 dev_err(dev, "Reset release failed\n");
1074                 return ret;
1075         }
1076
1077         return 0;
1078 }
1079 #endif
1080
1081 static int arasan_sdhci_probe(struct udevice *dev)
1082 {
1083         struct arasan_sdhci_plat *plat = dev_get_plat(dev);
1084         struct mmc_uclass_priv *upriv = dev_get_uclass_priv(dev);
1085         struct arasan_sdhci_priv *priv = dev_get_priv(dev);
1086         struct sdhci_host *host;
1087         struct clk clk;
1088         unsigned long clock;
1089         int ret;
1090
1091         host = priv->host;
1092
1093 #if defined(CONFIG_ARCH_ZYNQMP)
1094         if (device_is_compatible(dev, "xlnx,zynqmp-8.9a")) {
1095                 ret = zynqmp_pm_is_function_supported(PM_IOCTL,
1096                                                       IOCTL_SET_SD_CONFIG);
1097                 if (!ret) {
1098                         ret = sdhci_zynqmp_set_dynamic_config(priv, dev);
1099                         if (ret)
1100                                 return ret;
1101                 }
1102         }
1103 #endif
1104         if (device_is_compatible(dev, "xlnx,versal-net-5.1-emmc"))
1105                 priv->internal_phy_reg = true;
1106
1107         ret = clk_get_by_index(dev, 0, &clk);
1108         if (ret < 0) {
1109                 dev_err(dev, "failed to get clock\n");
1110                 return ret;
1111         }
1112
1113         clock = clk_get_rate(&clk);
1114         if (IS_ERR_VALUE(clock)) {
1115                 dev_err(dev, "failed to get rate\n");
1116                 return clock;
1117         }
1118
1119         dev_dbg(dev, "%s: CLK %ld\n", __func__, clock);
1120
1121         ret = clk_enable(&clk);
1122         if (ret) {
1123                 dev_err(dev, "failed to enable clock\n");
1124                 return ret;
1125         }
1126
1127         host->quirks = SDHCI_QUIRK_WAIT_SEND_CMD |
1128                        SDHCI_QUIRK_BROKEN_R1B;
1129
1130 #ifdef CONFIG_ZYNQ_HISPD_BROKEN
1131         host->quirks |= SDHCI_QUIRK_BROKEN_HISPD_MODE;
1132 #endif
1133
1134         if (priv->no_1p8)
1135                 host->quirks |= SDHCI_QUIRK_NO_1_8_V;
1136
1137         if (CONFIG_IS_ENABLED(ARCH_VERSAL_NET) &&
1138             device_is_compatible(dev, "xlnx,versal-net-5.1-emmc"))
1139                 host->quirks |= SDHCI_QUIRK_CAPS_BIT63_FOR_HS400;
1140
1141         plat->cfg.f_max = CONFIG_ZYNQ_SDHCI_MAX_FREQ;
1142
1143         ret = mmc_of_parse(dev, &plat->cfg);
1144         if (ret)
1145                 return ret;
1146
1147         host->max_clk = clock;
1148
1149         host->mmc = &plat->mmc;
1150         host->mmc->dev = dev;
1151         host->mmc->priv = host;
1152
1153         ret = sdhci_setup_cfg(&plat->cfg, host, plat->cfg.f_max,
1154                               CONFIG_ZYNQ_SDHCI_MIN_FREQ);
1155         if (ret)
1156                 return ret;
1157         upriv->mmc = host->mmc;
1158
1159         /*
1160          * WORKAROUND: Versal platforms have an issue with card detect state.
1161          * Due to this, host controller is switching off voltage to sd card
1162          * causing sd card timeout error. Workaround this by adding a wait for
1163          * 1000msec till the card detect state gets stable.
1164          */
1165         if (IS_ENABLED(CONFIG_ARCH_ZYNQMP) || IS_ENABLED(CONFIG_ARCH_VERSAL)) {
1166                 u32 timeout = 1000000;
1167
1168                 while (((sdhci_readl(host, SDHCI_PRESENT_STATE) &
1169                          SDHCI_CARD_STATE_STABLE) == 0) && timeout) {
1170                         udelay(1);
1171                         timeout--;
1172                 }
1173                 if (!timeout) {
1174                         dev_err(dev, "Sdhci card detect state not stable\n");
1175                         return -ETIMEDOUT;
1176                 }
1177         }
1178
1179         return sdhci_probe(dev);
1180 }
1181
1182 static int arasan_sdhci_of_to_plat(struct udevice *dev)
1183 {
1184         struct arasan_sdhci_priv *priv = dev_get_priv(dev);
1185         u32 pm_info[2];
1186
1187         priv->host = calloc(1, sizeof(struct sdhci_host));
1188         if (!priv->host)
1189                 return -1;
1190
1191         priv->host->name = dev->name;
1192
1193 #if defined(CONFIG_ARCH_ZYNQMP) || defined(CONFIG_ARCH_VERSAL) || defined(CONFIG_ARCH_VERSAL_NET)
1194         priv->host->ops = &arasan_ops;
1195         arasan_dt_parse_clk_phases(dev);
1196 #endif
1197
1198         priv->host->ioaddr = (void *)dev_read_addr(dev);
1199         if (IS_ERR(priv->host->ioaddr))
1200                 return PTR_ERR(priv->host->ioaddr);
1201
1202         priv->bank = dev_read_u32_default(dev, "xlnx,mio-bank", 0);
1203         priv->no_1p8 = dev_read_bool(dev, "no-1-8-v");
1204
1205         priv->node_id = 0;
1206         if (!dev_read_u32_array(dev, "power-domains", pm_info, ARRAY_SIZE(pm_info)))
1207                 priv->node_id = pm_info[1];
1208
1209         return 0;
1210 }
1211
1212 static int arasan_sdhci_bind(struct udevice *dev)
1213 {
1214         struct arasan_sdhci_plat *plat = dev_get_plat(dev);
1215
1216         return sdhci_bind(dev, &plat->mmc, &plat->cfg);
1217 }
1218
1219 static const struct udevice_id arasan_sdhci_ids[] = {
1220         { .compatible = "arasan,sdhci-8.9a" },
1221         { .compatible = "xlnx,versal-net-5.1-emmc" },
1222         { }
1223 };
1224
1225 U_BOOT_DRIVER(arasan_sdhci_drv) = {
1226         .name           = "arasan_sdhci",
1227         .id             = UCLASS_MMC,
1228         .of_match       = arasan_sdhci_ids,
1229         .of_to_plat = arasan_sdhci_of_to_plat,
1230         .ops            = &sdhci_ops,
1231         .bind           = arasan_sdhci_bind,
1232         .probe          = arasan_sdhci_probe,
1233         .priv_auto      = sizeof(struct arasan_sdhci_priv),
1234         .plat_auto      = sizeof(struct arasan_sdhci_plat),
1235 };