drivers/spi/fsl_qspi.c

   1 /*
   2  * Copyright 2013-2015 Freescale Semiconductor, Inc.
   3  *
   4  * Freescale Quad Serial Peripheral Interface (QSPI) driver
   5  *
   6  * SPDX-License-Identifier:     GPL-2.0+
   7  */
   8
   9 #include <common.h>
  10 #include <malloc.h>
  11 #include <spi.h>
  12 #include <asm/io.h>
  13 #include <linux/sizes.h>
  14 #include <dm.h>
  15 #include <errno.h>
  16 #include <watchdog.h>
  17 #include <wait_bit.h>
  18 #include "fsl_qspi.h"
  19
  20 DECLARE_GLOBAL_DATA_PTR;
  21
  22 #define RX_BUFFER_SIZE          0x80
  23 #ifdef CONFIG_MX6SX
  24 #define TX_BUFFER_SIZE          0x200
  25 #else
  26 #define TX_BUFFER_SIZE          0x40
  27 #endif
  28
  29 #define OFFSET_BITS_MASK        GENMASK(23, 0)
  30
  31 #define FLASH_STATUS_WEL        0x02
  32
  33 /* SEQID */
  34 #define SEQID_WREN              1
  35 #define SEQID_FAST_READ         2
  36 #define SEQID_RDSR              3
  37 #define SEQID_SE                4
  38 #define SEQID_CHIP_ERASE        5
  39 #define SEQID_PP                6
  40 #define SEQID_RDID              7
  41 #define SEQID_BE_4K             8
  42 #ifdef CONFIG_SPI_FLASH_BAR
  43 #define SEQID_BRRD              9
  44 #define SEQID_BRWR              10
  45 #define SEQID_RDEAR             11
  46 #define SEQID_WREAR             12
  47 #endif
  48 #define SEQID_WRAR              13
  49 #define SEQID_RDAR              14
  50
  51 /* QSPI CMD */
  52 #define QSPI_CMD_PP             0x02    /* Page program (up to 256 bytes) */
  53 #define QSPI_CMD_RDSR           0x05    /* Read status register */
  54 #define QSPI_CMD_WREN           0x06    /* Write enable */
  55 #define QSPI_CMD_FAST_READ      0x0b    /* Read data bytes (high frequency) */
  56 #define QSPI_CMD_BE_4K          0x20    /* 4K erase */
  57 #define QSPI_CMD_CHIP_ERASE     0xc7    /* Erase whole flash chip */
  58 #define QSPI_CMD_SE             0xd8    /* Sector erase (usually 64KiB) */
  59 #define QSPI_CMD_RDID           0x9f    /* Read JEDEC ID */
  60
  61 /* Used for Micron, winbond and Macronix flashes */
  62 #define QSPI_CMD_WREAR          0xc5    /* EAR register write */
  63 #define QSPI_CMD_RDEAR          0xc8    /* EAR reigster read */
  64
  65 /* Used for Spansion flashes only. */
  66 #define QSPI_CMD_BRRD           0x16    /* Bank register read */
  67 #define QSPI_CMD_BRWR           0x17    /* Bank register write */
  68
  69 /* Used for Spansion S25FS-S family flash only. */
  70 #define QSPI_CMD_RDAR           0x65    /* Read any device register */
  71 #define QSPI_CMD_WRAR           0x71    /* Write any device register */
  72
  73 /* 4-byte address QSPI CMD - used on Spansion and some Macronix flashes */
  74 #define QSPI_CMD_FAST_READ_4B   0x0c    /* Read data bytes (high frequency) */
  75 #define QSPI_CMD_PP_4B          0x12    /* Page program (up to 256 bytes) */
  76 #define QSPI_CMD_SE_4B          0xdc    /* Sector erase (usually 64KiB) */
  77
  78 /* fsl_qspi_platdata flags */
  79 #define QSPI_FLAG_REGMAP_ENDIAN_BIG     BIT(0)
  80
  81 /* default SCK frequency, unit: HZ */
  82 #define FSL_QSPI_DEFAULT_SCK_FREQ       50000000
  83
  84 /* QSPI max chipselect signals number */
  85 #define FSL_QSPI_MAX_CHIPSELECT_NUM     4
  86
  87 #ifdef CONFIG_DM_SPI
  88 /**
  89  * struct fsl_qspi_platdata - platform data for Freescale QSPI
  90  *
  91  * @flags: Flags for QSPI QSPI_FLAG_...
  92  * @speed_hz: Default SCK frequency
  93  * @reg_base: Base address of QSPI registers
  94  * @amba_base: Base address of QSPI memory mapping
  95  * @amba_total_size: size of QSPI memory mapping
  96  * @flash_num: Number of active slave devices
  97  * @num_chipselect: Number of QSPI chipselect signals
  98  */
  99 struct fsl_qspi_platdata {
 100         u32 flags;
 101         u32 speed_hz;
 102         fdt_addr_t reg_base;
 103         fdt_addr_t amba_base;
 104         fdt_size_t amba_total_size;
 105         u32 flash_num;
 106         u32 num_chipselect;
 107 };
 108 #endif
 109
 110 /**
 111  * struct fsl_qspi_priv - private data for Freescale QSPI
 112  *
 113  * @flags: Flags for QSPI QSPI_FLAG_...
 114  * @bus_clk: QSPI input clk frequency
 115  * @speed_hz: Default SCK frequency
 116  * @cur_seqid: current LUT table sequence id
 117  * @sf_addr: flash access offset
 118  * @amba_base: Base address of QSPI memory mapping of every CS
 119  * @amba_total_size: size of QSPI memory mapping
 120  * @cur_amba_base: Base address of QSPI memory mapping of current CS
 121  * @flash_num: Number of active slave devices
 122  * @num_chipselect: Number of QSPI chipselect signals
 123  * @regs: Point to QSPI register structure for I/O access
 124  */
 125 struct fsl_qspi_priv {
 126         u32 flags;
 127         u32 bus_clk;
 128         u32 speed_hz;
 129         u32 cur_seqid;
 130         u32 sf_addr;
 131         u32 amba_base[FSL_QSPI_MAX_CHIPSELECT_NUM];
 132         u32 amba_total_size;
 133         u32 cur_amba_base;
 134         u32 flash_num;
 135         u32 num_chipselect;
 136         struct fsl_qspi_regs *regs;
 137 };
 138
 139 #ifndef CONFIG_DM_SPI
 140 struct fsl_qspi {
 141         struct spi_slave slave;
 142         struct fsl_qspi_priv priv;
 143 };
 144 #endif
 145
 146 static u32 qspi_read32(u32 flags, u32 *addr)
 147 {
 148         return flags & QSPI_FLAG_REGMAP_ENDIAN_BIG ?
 149                 in_be32(addr) : in_le32(addr);
 150 }
 151
 152 static void qspi_write32(u32 flags, u32 *addr, u32 val)
 153 {
 154         flags & QSPI_FLAG_REGMAP_ENDIAN_BIG ?
 155                 out_be32(addr, val) : out_le32(addr, val);
 156 }
 157
 158 /* QSPI support swapping the flash read/write data
 159  * in hardware for LS102xA, but not for VF610 */
 160 static inline u32 qspi_endian_xchg(u32 data)
 161 {
 162 #ifdef CONFIG_VF610
 163         return swab32(data);
 164 #else
 165         return data;
 166 #endif
 167 }
 168
 169 static void qspi_set_lut(struct fsl_qspi_priv *priv)
 170 {
 171         struct fsl_qspi_regs *regs = priv->regs;
 172         u32 lut_base;
 173
 174         /* Unlock the LUT */
 175         qspi_write32(priv->flags, &regs->lutkey, LUT_KEY_VALUE);
 176         qspi_write32(priv->flags, &regs->lckcr, QSPI_LCKCR_UNLOCK);
 177
 178         /* Write Enable */
 179         lut_base = SEQID_WREN * 4;
 180         qspi_write32(priv->flags, &regs->lut[lut_base], OPRND0(QSPI_CMD_WREN) |
 181                 PAD0(LUT_PAD1) | INSTR0(LUT_CMD));
 182         qspi_write32(priv->flags, &regs->lut[lut_base + 1], 0);
 183         qspi_write32(priv->flags, &regs->lut[lut_base + 2], 0);
 184         qspi_write32(priv->flags, &regs->lut[lut_base + 3], 0);
 185
 186         /* Fast Read */
 187         lut_base = SEQID_FAST_READ * 4;
 188 #ifdef CONFIG_SPI_FLASH_BAR
 189         qspi_write32(priv->flags, &regs->lut[lut_base],
 190                      OPRND0(QSPI_CMD_FAST_READ) | PAD0(LUT_PAD1) |
 191                      INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
 192                      PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
 193 #else
 194         if (FSL_QSPI_FLASH_SIZE  <= SZ_16M)
 195                 qspi_write32(priv->flags, &regs->lut[lut_base],
 196                              OPRND0(QSPI_CMD_FAST_READ) | PAD0(LUT_PAD1) |
 197                              INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
 198                              PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
 199         else
 200                 qspi_write32(priv->flags, &regs->lut[lut_base],
 201                              OPRND0(QSPI_CMD_FAST_READ_4B) |
 202                              PAD0(LUT_PAD1) | INSTR0(LUT_CMD) |
 203                              OPRND1(ADDR32BIT) | PAD1(LUT_PAD1) |
 204                              INSTR1(LUT_ADDR));
 205 #endif
 206         qspi_write32(priv->flags, &regs->lut[lut_base + 1],
 207                      OPRND0(8) | PAD0(LUT_PAD1) | INSTR0(LUT_DUMMY) |
 208                      OPRND1(RX_BUFFER_SIZE) | PAD1(LUT_PAD1) |
 209                      INSTR1(LUT_READ));
 210         qspi_write32(priv->flags, &regs->lut[lut_base + 2], 0);
 211         qspi_write32(priv->flags, &regs->lut[lut_base + 3], 0);
 212
 213         /* Read Status */
 214         lut_base = SEQID_RDSR * 4;
 215         qspi_write32(priv->flags, &regs->lut[lut_base], OPRND0(QSPI_CMD_RDSR) |
 216                 PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(1) |
 217                 PAD1(LUT_PAD1) | INSTR1(LUT_READ));
 218         qspi_write32(priv->flags, &regs->lut[lut_base + 1], 0);
 219         qspi_write32(priv->flags, &regs->lut[lut_base + 2], 0);
 220         qspi_write32(priv->flags, &regs->lut[lut_base + 3], 0);
 221
 222         /* Erase a sector */
 223         lut_base = SEQID_SE * 4;
 224 #ifdef CONFIG_SPI_FLASH_BAR
 225         qspi_write32(priv->flags, &regs->lut[lut_base], OPRND0(QSPI_CMD_SE) |
 226                      PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
 227                      PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
 228 #else
 229         if (FSL_QSPI_FLASH_SIZE  <= SZ_16M)
 230                 qspi_write32(priv->flags, &regs->lut[lut_base],
 231                              OPRND0(QSPI_CMD_SE) | PAD0(LUT_PAD1) |
 232                              INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
 233                              PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
 234         else
 235                 qspi_write32(priv->flags, &regs->lut[lut_base],
 236                              OPRND0(QSPI_CMD_SE_4B) | PAD0(LUT_PAD1) |
 237                              INSTR0(LUT_CMD) | OPRND1(ADDR32BIT) |
 238                              PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
 239 #endif
 240         qspi_write32(priv->flags, &regs->lut[lut_base + 1], 0);
 241         qspi_write32(priv->flags, &regs->lut[lut_base + 2], 0);
 242         qspi_write32(priv->flags, &regs->lut[lut_base + 3], 0);
 243
 244         /* Erase the whole chip */
 245         lut_base = SEQID_CHIP_ERASE * 4;
 246         qspi_write32(priv->flags, &regs->lut[lut_base],
 247                      OPRND0(QSPI_CMD_CHIP_ERASE) |
 248                      PAD0(LUT_PAD1) | INSTR0(LUT_CMD));
 249         qspi_write32(priv->flags, &regs->lut[lut_base + 1], 0);
 250         qspi_write32(priv->flags, &regs->lut[lut_base + 2], 0);
 251         qspi_write32(priv->flags, &regs->lut[lut_base + 3], 0);
 252
 253         /* Page Program */
 254         lut_base = SEQID_PP * 4;
 255 #ifdef CONFIG_SPI_FLASH_BAR
 256         qspi_write32(priv->flags, &regs->lut[lut_base], OPRND0(QSPI_CMD_PP) |
 257                      PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
 258                      PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
 259 #else
 260         if (FSL_QSPI_FLASH_SIZE  <= SZ_16M)
 261                 qspi_write32(priv->flags, &regs->lut[lut_base],
 262                              OPRND0(QSPI_CMD_PP) | PAD0(LUT_PAD1) |
 263                              INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
 264                              PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
 265         else
 266                 qspi_write32(priv->flags, &regs->lut[lut_base],
 267                              OPRND0(QSPI_CMD_PP_4B) | PAD0(LUT_PAD1) |
 268                              INSTR0(LUT_CMD) | OPRND1(ADDR32BIT) |
 269                              PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
 270 #endif
 271 #ifdef CONFIG_MX6SX
 272         /*
 273          * To MX6SX, OPRND0(TX_BUFFER_SIZE) can not work correctly.
 274          * So, Use IDATSZ in IPCR to determine the size and here set 0.
 275          */
 276         qspi_write32(priv->flags, &regs->lut[lut_base + 1], OPRND0(0) |
 277                      PAD0(LUT_PAD1) | INSTR0(LUT_WRITE));
 278 #else
 279         qspi_write32(priv->flags, &regs->lut[lut_base + 1],
 280                      OPRND0(TX_BUFFER_SIZE) |
 281                      PAD0(LUT_PAD1) | INSTR0(LUT_WRITE));
 282 #endif
 283         qspi_write32(priv->flags, &regs->lut[lut_base + 2], 0);
 284         qspi_write32(priv->flags, &regs->lut[lut_base + 3], 0);
 285
 286         /* READ ID */
 287         lut_base = SEQID_RDID * 4;
 288         qspi_write32(priv->flags, &regs->lut[lut_base], OPRND0(QSPI_CMD_RDID) |
 289                 PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(8) |
 290                 PAD1(LUT_PAD1) | INSTR1(LUT_READ));
 291         qspi_write32(priv->flags, &regs->lut[lut_base + 1], 0);
 292         qspi_write32(priv->flags, &regs->lut[lut_base + 2], 0);
 293         qspi_write32(priv->flags, &regs->lut[lut_base + 3], 0);
 294
 295         /* SUB SECTOR 4K ERASE */
 296         lut_base = SEQID_BE_4K * 4;
 297         qspi_write32(priv->flags, &regs->lut[lut_base], OPRND0(QSPI_CMD_BE_4K) |
 298                      PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
 299                      PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
 300
 301 #ifdef CONFIG_SPI_FLASH_BAR
 302         /*
 303          * BRRD BRWR RDEAR WREAR are all supported, because it is hard to
 304          * dynamically check whether to set BRRD BRWR or RDEAR WREAR during
 305          * initialization.
 306          */
 307         lut_base = SEQID_BRRD * 4;
 308         qspi_write32(priv->flags, &regs->lut[lut_base], OPRND0(QSPI_CMD_BRRD) |
 309                      PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(1) |
 310                      PAD1(LUT_PAD1) | INSTR1(LUT_READ));
 311
 312         lut_base = SEQID_BRWR * 4;
 313         qspi_write32(priv->flags, &regs->lut[lut_base], OPRND0(QSPI_CMD_BRWR) |
 314                      PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(1) |
 315                      PAD1(LUT_PAD1) | INSTR1(LUT_WRITE));
 316
 317         lut_base = SEQID_RDEAR * 4;
 318         qspi_write32(priv->flags, &regs->lut[lut_base], OPRND0(QSPI_CMD_RDEAR) |
 319                      PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(1) |
 320                      PAD1(LUT_PAD1) | INSTR1(LUT_READ));
 321
 322         lut_base = SEQID_WREAR * 4;
 323         qspi_write32(priv->flags, &regs->lut[lut_base], OPRND0(QSPI_CMD_WREAR) |
 324                      PAD0(LUT_PAD1) | INSTR0(LUT_CMD) | OPRND1(1) |
 325                      PAD1(LUT_PAD1) | INSTR1(LUT_WRITE));
 326 #endif
 327
 328         /*
 329          * Read any device register.
 330          * Used for Spansion S25FS-S family flash only.
 331          */
 332         lut_base = SEQID_RDAR * 4;
 333         qspi_write32(priv->flags, &regs->lut[lut_base],
 334                      OPRND0(QSPI_CMD_RDAR) | PAD0(LUT_PAD1) |
 335                      INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
 336                      PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
 337         qspi_write32(priv->flags, &regs->lut[lut_base + 1],
 338                      OPRND0(8) | PAD0(LUT_PAD1) | INSTR0(LUT_DUMMY) |
 339                      OPRND1(1) | PAD1(LUT_PAD1) |
 340                      INSTR1(LUT_READ));
 341
 342         /*
 343          * Write any device register.
 344          * Used for Spansion S25FS-S family flash only.
 345          */
 346         lut_base = SEQID_WRAR * 4;
 347         qspi_write32(priv->flags, &regs->lut[lut_base],
 348                      OPRND0(QSPI_CMD_WRAR) | PAD0(LUT_PAD1) |
 349                      INSTR0(LUT_CMD) | OPRND1(ADDR24BIT) |
 350                      PAD1(LUT_PAD1) | INSTR1(LUT_ADDR));
 351         qspi_write32(priv->flags, &regs->lut[lut_base + 1],
 352                      OPRND0(1) | PAD0(LUT_PAD1) | INSTR0(LUT_WRITE));
 353
 354         /* Lock the LUT */
 355         qspi_write32(priv->flags, &regs->lutkey, LUT_KEY_VALUE);
 356         qspi_write32(priv->flags, &regs->lckcr, QSPI_LCKCR_LOCK);
 357 }
 358
 359 #if defined(CONFIG_SYS_FSL_QSPI_AHB)
 360 /*
 361  * If we have changed the content of the flash by writing or erasing,
 362  * we need to invalidate the AHB buffer. If we do not do so, we may read out
 363  * the wrong data. The spec tells us reset the AHB domain and Serial Flash
 364  * domain at the same time.
 365  */
 366 static inline void qspi_ahb_invalid(struct fsl_qspi_priv *priv)
 367 {
 368         struct fsl_qspi_regs *regs = priv->regs;
 369         u32 reg;
 370
 371         reg = qspi_read32(priv->flags, &regs->mcr);
 372         reg |= QSPI_MCR_SWRSTHD_MASK | QSPI_MCR_SWRSTSD_MASK;
 373         qspi_write32(priv->flags, &regs->mcr, reg);
 374
 375         /*
 376          * The minimum delay : 1 AHB + 2 SFCK clocks.
 377          * Delay 1 us is enough.
 378          */
 379         udelay(1);
 380
 381         reg &= ~(QSPI_MCR_SWRSTHD_MASK | QSPI_MCR_SWRSTSD_MASK);
 382         qspi_write32(priv->flags, &regs->mcr, reg);
 383 }
 384
 385 /* Read out the data from the AHB buffer. */
 386 static inline void qspi_ahb_read(struct fsl_qspi_priv *priv, u8 *rxbuf, int len)
 387 {
 388         struct fsl_qspi_regs *regs = priv->regs;
 389         u32 mcr_reg;
 390         void *rx_addr = NULL;
 391
 392         mcr_reg = qspi_read32(priv->flags, &regs->mcr);
 393
 394         qspi_write32(priv->flags, &regs->mcr,
 395                      QSPI_MCR_CLR_RXF_MASK | QSPI_MCR_CLR_TXF_MASK |
 396                      QSPI_MCR_RESERVED_MASK | QSPI_MCR_END_CFD_LE);
 397
 398         rx_addr = (void *)(uintptr_t)(priv->cur_amba_base + priv->sf_addr);
 399         /* Read out the data directly from the AHB buffer. */
 400         memcpy(rxbuf, rx_addr, len);
 401
 402         qspi_write32(priv->flags, &regs->mcr, mcr_reg);
 403 }
 404
 405 static void qspi_enable_ddr_mode(struct fsl_qspi_priv *priv)
 406 {
 407         u32 reg, reg2;
 408         struct fsl_qspi_regs *regs = priv->regs;
 409
 410         reg = qspi_read32(priv->flags, &regs->mcr);
 411         /* Disable the module */
 412         qspi_write32(priv->flags, &regs->mcr, reg | QSPI_MCR_MDIS_MASK);
 413
 414         /* Set the Sampling Register for DDR */
 415         reg2 = qspi_read32(priv->flags, &regs->smpr);
 416         reg2 &= ~QSPI_SMPR_DDRSMP_MASK;
 417         reg2 |= (2 << QSPI_SMPR_DDRSMP_SHIFT);
 418         qspi_write32(priv->flags, &regs->smpr, reg2);
 419
 420         /* Enable the module again (enable the DDR too) */
 421         reg |= QSPI_MCR_DDR_EN_MASK;
 422         /* Enable bit 29 for imx6sx */
 423         reg |= BIT(29);
 424
 425         qspi_write32(priv->flags, &regs->mcr, reg);
 426 }
 427
 428 /*
 429  * There are two different ways to read out the data from the flash:
 430  *  the "IP Command Read" and the "AHB Command Read".
 431  *
 432  * The IC guy suggests we use the "AHB Command Read" which is faster
 433  * then the "IP Command Read". (What's more is that there is a bug in
 434  * the "IP Command Read" in the Vybrid.)
 435  *
 436  * After we set up the registers for the "AHB Command Read", we can use
 437  * the memcpy to read the data directly. A "missed" access to the buffer
 438  * causes the controller to clear the buffer, and use the sequence pointed
 439  * by the QUADSPI_BFGENCR[SEQID] to initiate a read from the flash.
 440  */
 441 static void qspi_init_ahb_read(struct fsl_qspi_priv *priv)
 442 {
 443         struct fsl_qspi_regs *regs = priv->regs;
 444
 445         /* AHB configuration for access buffer 0/1/2 .*/
 446         qspi_write32(priv->flags, &regs->buf0cr, QSPI_BUFXCR_INVALID_MSTRID);
 447         qspi_write32(priv->flags, &regs->buf1cr, QSPI_BUFXCR_INVALID_MSTRID);
 448         qspi_write32(priv->flags, &regs->buf2cr, QSPI_BUFXCR_INVALID_MSTRID);
 449         qspi_write32(priv->flags, &regs->buf3cr, QSPI_BUF3CR_ALLMST_MASK |
 450                      (0x80 << QSPI_BUF3CR_ADATSZ_SHIFT));
 451
 452         /* We only use the buffer3 */
 453         qspi_write32(priv->flags, &regs->buf0ind, 0);
 454         qspi_write32(priv->flags, &regs->buf1ind, 0);
 455         qspi_write32(priv->flags, &regs->buf2ind, 0);
 456
 457         /*
 458          * Set the default lut sequence for AHB Read.
 459          * Parallel mode is disabled.
 460          */
 461         qspi_write32(priv->flags, &regs->bfgencr,
 462                      SEQID_FAST_READ << QSPI_BFGENCR_SEQID_SHIFT);
 463
 464         /*Enable DDR Mode*/
 465         qspi_enable_ddr_mode(priv);
 466 }
 467 #endif
 468
 469 #ifdef CONFIG_SPI_FLASH_BAR
 470 /* Bank register read/write, EAR register read/write */
 471 static void qspi_op_rdbank(struct fsl_qspi_priv *priv, u8 *rxbuf, u32 len)
 472 {
 473         struct fsl_qspi_regs *regs = priv->regs;
 474         u32 reg, mcr_reg, data, seqid;
 475
 476         mcr_reg = qspi_read32(priv->flags, &regs->mcr);
 477         qspi_write32(priv->flags, &regs->mcr,
 478                      QSPI_MCR_CLR_RXF_MASK | QSPI_MCR_CLR_TXF_MASK |
 479                      QSPI_MCR_RESERVED_MASK | QSPI_MCR_END_CFD_LE);
 480         qspi_write32(priv->flags, &regs->rbct, QSPI_RBCT_RXBRD_USEIPS);
 481
 482         qspi_write32(priv->flags, &regs->sfar, priv->cur_amba_base);
 483
 484         if (priv->cur_seqid == QSPI_CMD_BRRD)
 485                 seqid = SEQID_BRRD;
 486         else
 487                 seqid = SEQID_RDEAR;
 488
 489         qspi_write32(priv->flags, &regs->ipcr,
 490                      (seqid << QSPI_IPCR_SEQID_SHIFT) | len);
 491
 492         /* Wait previous command complete */
 493         while (qspi_read32(priv->flags, &regs->sr) & QSPI_SR_BUSY_MASK)
 494                 ;
 495
 496         while (1) {
 497                 WATCHDOG_RESET();
 498
 499                 reg = qspi_read32(priv->flags, &regs->rbsr);
 500                 if (reg & QSPI_RBSR_RDBFL_MASK) {
 501                         data = qspi_read32(priv->flags, &regs->rbdr[0]);
 502                         data = qspi_endian_xchg(data);
 503                         memcpy(rxbuf, &data, len);
 504                         qspi_write32(priv->flags, &regs->mcr,
 505                                      qspi_read32(priv->flags, &regs->mcr) |
 506                                      QSPI_MCR_CLR_RXF_MASK);
 507                         break;
 508                 }
 509         }
 510
 511         qspi_write32(priv->flags, &regs->mcr, mcr_reg);
 512 }
 513 #endif
 514
 515 static void qspi_op_rdid(struct fsl_qspi_priv *priv, u32 *rxbuf, u32 len)
 516 {
 517         struct fsl_qspi_regs *regs = priv->regs;
 518         u32 mcr_reg, rbsr_reg, data, size;
 519         int i;
 520
 521         mcr_reg = qspi_read32(priv->flags, &regs->mcr);
 522         qspi_write32(priv->flags, &regs->mcr,
 523                      QSPI_MCR_CLR_RXF_MASK | QSPI_MCR_CLR_TXF_MASK |
 524                      QSPI_MCR_RESERVED_MASK | QSPI_MCR_END_CFD_LE);
 525         qspi_write32(priv->flags, &regs->rbct, QSPI_RBCT_RXBRD_USEIPS);
 526
 527         qspi_write32(priv->flags, &regs->sfar, priv->cur_amba_base);
 528
 529         qspi_write32(priv->flags, &regs->ipcr,
 530                      (SEQID_RDID << QSPI_IPCR_SEQID_SHIFT) | 0);
 531         while (qspi_read32(priv->flags, &regs->sr) & QSPI_SR_BUSY_MASK)
 532                 ;
 533
 534         i = 0;
 535         while ((RX_BUFFER_SIZE >= len) && (len > 0)) {
 536                 WATCHDOG_RESET();
 537
 538                 rbsr_reg = qspi_read32(priv->flags, &regs->rbsr);
 539                 if (rbsr_reg & QSPI_RBSR_RDBFL_MASK) {
 540                         data = qspi_read32(priv->flags, &regs->rbdr[i]);
 541                         data = qspi_endian_xchg(data);
 542                         size = (len < 4) ? len : 4;
 543                         memcpy(rxbuf, &data, size);
 544                         len -= size;
 545                         rxbuf++;
 546                         i++;
 547                 }
 548         }
 549
 550         qspi_write32(priv->flags, &regs->mcr, mcr_reg);
 551 }
 552
 553 /* If not use AHB read, read data from ip interface */
 554 static void qspi_op_read(struct fsl_qspi_priv *priv, u32 *rxbuf, u32 len)
 555 {
 556         struct fsl_qspi_regs *regs = priv->regs;
 557         u32 mcr_reg, data;
 558         int i, size;
 559         u32 to_or_from;
 560         u32 seqid;
 561
 562         if (priv->cur_seqid == QSPI_CMD_RDAR)
 563                 seqid = SEQID_RDAR;
 564         else
 565                 seqid = SEQID_FAST_READ;
 566
 567         mcr_reg = qspi_read32(priv->flags, &regs->mcr);
 568         qspi_write32(priv->flags, &regs->mcr,
 569                      QSPI_MCR_CLR_RXF_MASK | QSPI_MCR_CLR_TXF_MASK |
 570                      QSPI_MCR_RESERVED_MASK | QSPI_MCR_END_CFD_LE);
 571         qspi_write32(priv->flags, &regs->rbct, QSPI_RBCT_RXBRD_USEIPS);
 572
 573         to_or_from = priv->sf_addr + priv->cur_amba_base;
 574
 575         while (len > 0) {
 576                 WATCHDOG_RESET();
 577
 578                 qspi_write32(priv->flags, &regs->sfar, to_or_from);
 579
 580                 size = (len > RX_BUFFER_SIZE) ?
 581                         RX_BUFFER_SIZE : len;
 582
 583                 qspi_write32(priv->flags, &regs->ipcr,
 584                              (seqid << QSPI_IPCR_SEQID_SHIFT) |
 585                              size);
 586                 while (qspi_read32(priv->flags, &regs->sr) & QSPI_SR_BUSY_MASK)
 587                         ;
 588
 589                 to_or_from += size;
 590                 len -= size;
 591
 592                 i = 0;
 593                 while ((RX_BUFFER_SIZE >= size) && (size > 0)) {
 594                         data = qspi_read32(priv->flags, &regs->rbdr[i]);
 595                         data = qspi_endian_xchg(data);
 596                         if (size < 4)
 597                                 memcpy(rxbuf, &data, size);
 598                         else
 599                                 memcpy(rxbuf, &data, 4);
 600                         rxbuf++;
 601                         size -= 4;
 602                         i++;
 603                 }
 604                 qspi_write32(priv->flags, &regs->mcr,
 605                              qspi_read32(priv->flags, &regs->mcr) |
 606                              QSPI_MCR_CLR_RXF_MASK);
 607         }
 608
 609         qspi_write32(priv->flags, &regs->mcr, mcr_reg);
 610 }
 611
 612 static void qspi_op_write(struct fsl_qspi_priv *priv, u8 *txbuf, u32 len)
 613 {
 614         struct fsl_qspi_regs *regs = priv->regs;
 615         u32 mcr_reg, data, reg, status_reg, seqid;
 616         int i, size, tx_size;
 617         u32 to_or_from = 0;
 618
 619         mcr_reg = qspi_read32(priv->flags, &regs->mcr);
 620         qspi_write32(priv->flags, &regs->mcr,
 621                      QSPI_MCR_CLR_RXF_MASK | QSPI_MCR_CLR_TXF_MASK |
 622                      QSPI_MCR_RESERVED_MASK | QSPI_MCR_END_CFD_LE);
 623         qspi_write32(priv->flags, &regs->rbct, QSPI_RBCT_RXBRD_USEIPS);
 624
 625         status_reg = 0;
 626         while ((status_reg & FLASH_STATUS_WEL) != FLASH_STATUS_WEL) {
 627                 WATCHDOG_RESET();
 628
 629                 qspi_write32(priv->flags, &regs->ipcr,
 630                              (SEQID_WREN << QSPI_IPCR_SEQID_SHIFT) | 0);
 631                 while (qspi_read32(priv->flags, &regs->sr) & QSPI_SR_BUSY_MASK)
 632                         ;
 633
 634                 qspi_write32(priv->flags, &regs->ipcr,
 635                              (SEQID_RDSR << QSPI_IPCR_SEQID_SHIFT) | 1);
 636                 while (qspi_read32(priv->flags, &regs->sr) & QSPI_SR_BUSY_MASK)
 637                         ;
 638
 639                 reg = qspi_read32(priv->flags, &regs->rbsr);
 640                 if (reg & QSPI_RBSR_RDBFL_MASK) {
 641                         status_reg = qspi_read32(priv->flags, &regs->rbdr[0]);
 642                         status_reg = qspi_endian_xchg(status_reg);
 643                 }
 644                 qspi_write32(priv->flags, &regs->mcr,
 645                              qspi_read32(priv->flags, &regs->mcr) |
 646                              QSPI_MCR_CLR_RXF_MASK);
 647         }
 648
 649         /* Default is page programming */
 650         seqid = SEQID_PP;
 651         if (priv->cur_seqid == QSPI_CMD_WRAR)
 652                 seqid = SEQID_WRAR;
 653 #ifdef CONFIG_SPI_FLASH_BAR
 654         if (priv->cur_seqid == QSPI_CMD_BRWR)
 655                 seqid = SEQID_BRWR;
 656         else if (priv->cur_seqid == QSPI_CMD_WREAR)
 657                 seqid = SEQID_WREAR;
 658 #endif
 659
 660         to_or_from = priv->sf_addr + priv->cur_amba_base;
 661
 662         qspi_write32(priv->flags, &regs->sfar, to_or_from);
 663
 664         tx_size = (len > TX_BUFFER_SIZE) ?
 665                 TX_BUFFER_SIZE : len;
 666
 667         size = tx_size / 16;
 668         /*
 669          * There must be atleast 128bit data
 670          * available in TX FIFO for any pop operation
 671          */
 672         if (tx_size % 16)
 673                 size++;
 674         for (i = 0; i < size * 4; i++) {
 675                 memcpy(&data, txbuf, 4);
 676                 data = qspi_endian_xchg(data);
 677                 qspi_write32(priv->flags, &regs->tbdr, data);
 678                 txbuf += 4;
 679         }
 680
 681         qspi_write32(priv->flags, &regs->ipcr,
 682                      (seqid << QSPI_IPCR_SEQID_SHIFT) | tx_size);
 683         while (qspi_read32(priv->flags, &regs->sr) & QSPI_SR_BUSY_MASK)
 684                 ;
 685
 686         qspi_write32(priv->flags, &regs->mcr, mcr_reg);
 687 }
 688
 689 static void qspi_op_rdsr(struct fsl_qspi_priv *priv, void *rxbuf, u32 len)
 690 {
 691         struct fsl_qspi_regs *regs = priv->regs;
 692         u32 mcr_reg, reg, data;
 693
 694         mcr_reg = qspi_read32(priv->flags, &regs->mcr);
 695         qspi_write32(priv->flags, &regs->mcr,
 696                      QSPI_MCR_CLR_RXF_MASK | QSPI_MCR_CLR_TXF_MASK |
 697                      QSPI_MCR_RESERVED_MASK | QSPI_MCR_END_CFD_LE);
 698         qspi_write32(priv->flags, &regs->rbct, QSPI_RBCT_RXBRD_USEIPS);
 699
 700         qspi_write32(priv->flags, &regs->sfar, priv->cur_amba_base);
 701
 702         qspi_write32(priv->flags, &regs->ipcr,
 703                      (SEQID_RDSR << QSPI_IPCR_SEQID_SHIFT) | 0);
 704         while (qspi_read32(priv->flags, &regs->sr) & QSPI_SR_BUSY_MASK)
 705                 ;
 706
 707         while (1) {
 708                 WATCHDOG_RESET();
 709
 710                 reg = qspi_read32(priv->flags, &regs->rbsr);
 711                 if (reg & QSPI_RBSR_RDBFL_MASK) {
 712                         data = qspi_read32(priv->flags, &regs->rbdr[0]);
 713                         data = qspi_endian_xchg(data);
 714                         memcpy(rxbuf, &data, len);
 715                         qspi_write32(priv->flags, &regs->mcr,
 716                                      qspi_read32(priv->flags, &regs->mcr) |
 717                                      QSPI_MCR_CLR_RXF_MASK);
 718                         break;
 719                 }
 720         }
 721
 722         qspi_write32(priv->flags, &regs->mcr, mcr_reg);
 723 }
 724
 725 static void qspi_op_erase(struct fsl_qspi_priv *priv)
 726 {
 727         struct fsl_qspi_regs *regs = priv->regs;
 728         u32 mcr_reg;
 729         u32 to_or_from = 0;
 730
 731         mcr_reg = qspi_read32(priv->flags, &regs->mcr);
 732         qspi_write32(priv->flags, &regs->mcr,
 733                      QSPI_MCR_CLR_RXF_MASK | QSPI_MCR_CLR_TXF_MASK |
 734                      QSPI_MCR_RESERVED_MASK | QSPI_MCR_END_CFD_LE);
 735         qspi_write32(priv->flags, &regs->rbct, QSPI_RBCT_RXBRD_USEIPS);
 736
 737         to_or_from = priv->sf_addr + priv->cur_amba_base;
 738         qspi_write32(priv->flags, &regs->sfar, to_or_from);
 739
 740         qspi_write32(priv->flags, &regs->ipcr,
 741                      (SEQID_WREN << QSPI_IPCR_SEQID_SHIFT) | 0);
 742         while (qspi_read32(priv->flags, &regs->sr) & QSPI_SR_BUSY_MASK)
 743                 ;
 744
 745         if (priv->cur_seqid == QSPI_CMD_SE) {
 746                 qspi_write32(priv->flags, &regs->ipcr,
 747                              (SEQID_SE << QSPI_IPCR_SEQID_SHIFT) | 0);
 748         } else if (priv->cur_seqid == QSPI_CMD_BE_4K) {
 749                 qspi_write32(priv->flags, &regs->ipcr,
 750                              (SEQID_BE_4K << QSPI_IPCR_SEQID_SHIFT) | 0);
 751         }
 752         while (qspi_read32(priv->flags, &regs->sr) & QSPI_SR_BUSY_MASK)
 753                 ;
 754
 755         qspi_write32(priv->flags, &regs->mcr, mcr_reg);
 756 }
 757
 758 int qspi_xfer(struct fsl_qspi_priv *priv, unsigned int bitlen,
 759                 const void *dout, void *din, unsigned long flags)
 760 {
 761         u32 bytes = DIV_ROUND_UP(bitlen, 8);
 762         static u32 wr_sfaddr;
 763         u32 txbuf;
 764
 765         WATCHDOG_RESET();
 766
 767         if (dout) {
 768                 if (flags & SPI_XFER_BEGIN) {
 769                         priv->cur_seqid = *(u8 *)dout;
 770                         memcpy(&txbuf, dout, 4);
 771                 }
 772
 773                 if (flags == SPI_XFER_END) {
 774                         priv->sf_addr = wr_sfaddr;
 775                         qspi_op_write(priv, (u8 *)dout, bytes);
 776                         return 0;
 777                 }
 778
 779                 if (priv->cur_seqid == QSPI_CMD_FAST_READ ||
 780                     priv->cur_seqid == QSPI_CMD_RDAR) {
 781                         priv->sf_addr = swab32(txbuf) & OFFSET_BITS_MASK;
 782                 } else if ((priv->cur_seqid == QSPI_CMD_SE) ||
 783                            (priv->cur_seqid == QSPI_CMD_BE_4K)) {
 784                         priv->sf_addr = swab32(txbuf) & OFFSET_BITS_MASK;
 785                         qspi_op_erase(priv);
 786                 } else if (priv->cur_seqid == QSPI_CMD_PP ||
 787                            priv->cur_seqid == QSPI_CMD_WRAR) {
 788                         wr_sfaddr = swab32(txbuf) & OFFSET_BITS_MASK;
 789                 } else if ((priv->cur_seqid == QSPI_CMD_BRWR) ||
 790                          (priv->cur_seqid == QSPI_CMD_WREAR)) {
 791 #ifdef CONFIG_SPI_FLASH_BAR
 792                         wr_sfaddr = 0;
 793 #endif
 794                 }
 795         }
 796
 797         if (din) {
 798                 if (priv->cur_seqid == QSPI_CMD_FAST_READ) {
 799 #ifdef CONFIG_SYS_FSL_QSPI_AHB
 800                         qspi_ahb_read(priv, din, bytes);
 801 #else
 802                         qspi_op_read(priv, din, bytes);
 803 #endif
 804                 } else if (priv->cur_seqid == QSPI_CMD_RDAR) {
 805                         qspi_op_read(priv, din, bytes);
 806                 } else if (priv->cur_seqid == QSPI_CMD_RDID)
 807                         qspi_op_rdid(priv, din, bytes);
 808                 else if (priv->cur_seqid == QSPI_CMD_RDSR)
 809                         qspi_op_rdsr(priv, din, bytes);
 810 #ifdef CONFIG_SPI_FLASH_BAR
 811                 else if ((priv->cur_seqid == QSPI_CMD_BRRD) ||
 812                          (priv->cur_seqid == QSPI_CMD_RDEAR)) {
 813                         priv->sf_addr = 0;
 814                         qspi_op_rdbank(priv, din, bytes);
 815                 }
 816 #endif
 817         }
 818
 819 #ifdef CONFIG_SYS_FSL_QSPI_AHB
 820         if ((priv->cur_seqid == QSPI_CMD_SE) ||
 821             (priv->cur_seqid == QSPI_CMD_PP) ||
 822             (priv->cur_seqid == QSPI_CMD_BE_4K) ||
 823             (priv->cur_seqid == QSPI_CMD_WREAR) ||
 824             (priv->cur_seqid == QSPI_CMD_BRWR))
 825                 qspi_ahb_invalid(priv);
 826 #endif
 827
 828         return 0;
 829 }
 830
 831 void qspi_module_disable(struct fsl_qspi_priv *priv, u8 disable)
 832 {
 833         u32 mcr_val;
 834
 835         mcr_val = qspi_read32(priv->flags, &priv->regs->mcr);
 836         if (disable)
 837                 mcr_val |= QSPI_MCR_MDIS_MASK;
 838         else
 839                 mcr_val &= ~QSPI_MCR_MDIS_MASK;
 840         qspi_write32(priv->flags, &priv->regs->mcr, mcr_val);
 841 }
 842
 843 void qspi_cfg_smpr(struct fsl_qspi_priv *priv, u32 clear_bits, u32 set_bits)
 844 {
 845         u32 smpr_val;
 846
 847         smpr_val = qspi_read32(priv->flags, &priv->regs->smpr);
 848         smpr_val &= ~clear_bits;
 849         smpr_val |= set_bits;
 850         qspi_write32(priv->flags, &priv->regs->smpr, smpr_val);
 851 }
 852 #ifndef CONFIG_DM_SPI
 853 static unsigned long spi_bases[] = {
 854         QSPI0_BASE_ADDR,
 855 #ifdef CONFIG_MX6SX
 856         QSPI1_BASE_ADDR,
 857 #endif
 858 };
 859
 860 static unsigned long amba_bases[] = {
 861         QSPI0_AMBA_BASE,
 862 #ifdef CONFIG_MX6SX
 863         QSPI1_AMBA_BASE,
 864 #endif
 865 };
 866
 867 static inline struct fsl_qspi *to_qspi_spi(struct spi_slave *slave)
 868 {
 869         return container_of(slave, struct fsl_qspi, slave);
 870 }
 871
 872 struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 873                 unsigned int max_hz, unsigned int mode)
 874 {
 875         u32 mcr_val;
 876         struct fsl_qspi *qspi;
 877         struct fsl_qspi_regs *regs;
 878         u32 total_size;
 879
 880         if (bus >= ARRAY_SIZE(spi_bases))
 881                 return NULL;
 882
 883         if (cs >= FSL_QSPI_FLASH_NUM)
 884                 return NULL;
 885
 886         qspi = spi_alloc_slave(struct fsl_qspi, bus, cs);
 887         if (!qspi)
 888                 return NULL;
 889
 890 #ifdef CONFIG_SYS_FSL_QSPI_BE
 891         qspi->priv.flags |= QSPI_FLAG_REGMAP_ENDIAN_BIG;
 892 #endif
 893
 894         regs = (struct fsl_qspi_regs *)spi_bases[bus];
 895         qspi->priv.regs = regs;
 896         /*
 897          * According cs, use different amba_base to choose the
 898          * corresponding flash devices.
 899          *
 900          * If not, only one flash device is used even if passing
 901          * different cs using `sf probe`
 902          */
 903         qspi->priv.cur_amba_base = amba_bases[bus] + cs * FSL_QSPI_FLASH_SIZE;
 904
 905         qspi->slave.max_write_size = TX_BUFFER_SIZE;
 906
 907         mcr_val = qspi_read32(qspi->priv.flags, &regs->mcr);
 908         qspi_write32(qspi->priv.flags, &regs->mcr,
 909                      QSPI_MCR_RESERVED_MASK | QSPI_MCR_MDIS_MASK |
 910                      (mcr_val & QSPI_MCR_END_CFD_MASK));
 911
 912         qspi_cfg_smpr(&qspi->priv,
 913                       ~(QSPI_SMPR_FSDLY_MASK | QSPI_SMPR_DDRSMP_MASK |
 914                       QSPI_SMPR_FSPHS_MASK | QSPI_SMPR_HSENA_MASK), 0);
 915
 916         total_size = FSL_QSPI_FLASH_SIZE * FSL_QSPI_FLASH_NUM;
 917         /*
 918          * Any read access to non-implemented addresses will provide
 919          * undefined results.
 920          *
 921          * In case single die flash devices, TOP_ADDR_MEMA2 and
 922          * TOP_ADDR_MEMB2 should be initialized/programmed to
 923          * TOP_ADDR_MEMA1 and TOP_ADDR_MEMB1 respectively - in effect,
 924          * setting the size of these devices to 0.  This would ensure
 925          * that the complete memory map is assigned to only one flash device.
 926          */
 927         qspi_write32(qspi->priv.flags, &regs->sfa1ad,
 928                      FSL_QSPI_FLASH_SIZE | amba_bases[bus]);
 929         qspi_write32(qspi->priv.flags, &regs->sfa2ad,
 930                      FSL_QSPI_FLASH_SIZE | amba_bases[bus]);
 931         qspi_write32(qspi->priv.flags, &regs->sfb1ad,
 932                      total_size | amba_bases[bus]);
 933         qspi_write32(qspi->priv.flags, &regs->sfb2ad,
 934                      total_size | amba_bases[bus]);
 935
 936         qspi_set_lut(&qspi->priv);
 937
 938 #ifdef CONFIG_SYS_FSL_QSPI_AHB
 939         qspi_init_ahb_read(&qspi->priv);
 940 #endif
 941
 942         qspi_module_disable(&qspi->priv, 0);
 943
 944         return &qspi->slave;
 945 }
 946
 947 void spi_free_slave(struct spi_slave *slave)
 948 {
 949         struct fsl_qspi *qspi = to_qspi_spi(slave);
 950
 951         free(qspi);
 952 }
 953
 954 int spi_claim_bus(struct spi_slave *slave)
 955 {
 956         return 0;
 957 }
 958
 959 void spi_release_bus(struct spi_slave *slave)
 960 {
 961         /* Nothing to do */
 962 }
 963
 964 int spi_xfer(struct spi_slave *slave, unsigned int bitlen,
 965                 const void *dout, void *din, unsigned long flags)
 966 {
 967         struct fsl_qspi *qspi = to_qspi_spi(slave);
 968
 969         return qspi_xfer(&qspi->priv, bitlen, dout, din, flags);
 970 }
 971
 972 void spi_init(void)
 973 {
 974         /* Nothing to do */
 975 }
 976 #else
 977 static int fsl_qspi_child_pre_probe(struct udevice *dev)
 978 {
 979         struct spi_slave *slave = dev_get_parent_priv(dev);
 980
 981         slave->max_write_size = TX_BUFFER_SIZE;
 982
 983         return 0;
 984 }
 985
 986 static int fsl_qspi_probe(struct udevice *bus)
 987 {
 988         u32 mcr_val;
 989         u32 amba_size_per_chip;
 990         struct fsl_qspi_platdata *plat = dev_get_platdata(bus);
 991         struct fsl_qspi_priv *priv = dev_get_priv(bus);
 992         struct dm_spi_bus *dm_spi_bus;
 993         int i, ret;
 994
 995         dm_spi_bus = bus->uclass_priv;
 996
 997         dm_spi_bus->max_hz = plat->speed_hz;
 998
 999         priv->regs = (struct fsl_qspi_regs *)(uintptr_t)plat->reg_base;
1000         priv->flags = plat->flags;
1001
1002         priv->speed_hz = plat->speed_hz;
1003         /*
1004          * QSPI SFADR width is 32bits, the max dest addr is 4GB-1.
1005          * AMBA memory zone should be located on the 0~4GB space
1006          * even on a 64bits cpu.
1007          */
1008         priv->amba_base[0] = (u32)plat->amba_base;
1009         priv->amba_total_size = (u32)plat->amba_total_size;
1010         priv->flash_num = plat->flash_num;
1011         priv->num_chipselect = plat->num_chipselect;
1012
1013         /* make sure controller is not busy anywhere */
1014         ret = wait_for_bit(__func__, &priv->regs->sr,
1015                            QSPI_SR_BUSY_MASK |
1016                            QSPI_SR_AHB_ACC_MASK |
1017                            QSPI_SR_IP_ACC_MASK,
1018                            false, 100, false);
1019
1020         if (ret) {
1021                 debug("ERROR : The controller is busy\n");
1022                 return ret;
1023         }
1024
1025         mcr_val = qspi_read32(priv->flags, &priv->regs->mcr);
1026         qspi_write32(priv->flags, &priv->regs->mcr,
1027                      QSPI_MCR_RESERVED_MASK | QSPI_MCR_MDIS_MASK |
1028                      (mcr_val & QSPI_MCR_END_CFD_MASK));
1029
1030         qspi_cfg_smpr(priv, ~(QSPI_SMPR_FSDLY_MASK | QSPI_SMPR_DDRSMP_MASK |
1031                 QSPI_SMPR_FSPHS_MASK | QSPI_SMPR_HSENA_MASK), 0);
1032
1033         /*
1034          * Assign AMBA memory zone for every chipselect
1035          * QuadSPI has two channels, every channel has two chipselects.
1036          * If the property 'num-cs' in dts is 2, the AMBA memory will be divided
1037          * into two parts and assign to every channel. This indicate that every
1038          * channel only has one valid chipselect.
1039          * If the property 'num-cs' in dts is 4, the AMBA memory will be divided
1040          * into four parts and assign to every chipselect.
1041          * Every channel will has two valid chipselects.
1042          */
1043         amba_size_per_chip = priv->amba_total_size >>
1044                              (priv->num_chipselect >> 1);
1045         for (i = 1 ; i < priv->num_chipselect ; i++)
1046                 priv->amba_base[i] =
1047                         amba_size_per_chip + priv->amba_base[i - 1];
1048
1049         /*
1050          * Any read access to non-implemented addresses will provide
1051          * undefined results.
1052          *
1053          * In case single die flash devices, TOP_ADDR_MEMA2 and
1054          * TOP_ADDR_MEMB2 should be initialized/programmed to
1055          * TOP_ADDR_MEMA1 and TOP_ADDR_MEMB1 respectively - in effect,
1056          * setting the size of these devices to 0.  This would ensure
1057          * that the complete memory map is assigned to only one flash device.
1058          */
1059         qspi_write32(priv->flags, &priv->regs->sfa1ad,
1060                      priv->amba_base[0] + amba_size_per_chip);
1061         switch (priv->num_chipselect) {
1062         case 1:
1063                 break;
1064         case 2:
1065                 qspi_write32(priv->flags, &priv->regs->sfa2ad,
1066                              priv->amba_base[1]);
1067                 qspi_write32(priv->flags, &priv->regs->sfb1ad,
1068                              priv->amba_base[1] + amba_size_per_chip);
1069                 qspi_write32(priv->flags, &priv->regs->sfb2ad,
1070                              priv->amba_base[1] + amba_size_per_chip);
1071                 break;
1072         case 4:
1073                 qspi_write32(priv->flags, &priv->regs->sfa2ad,
1074                              priv->amba_base[2]);
1075                 qspi_write32(priv->flags, &priv->regs->sfb1ad,
1076                              priv->amba_base[3]);
1077                 qspi_write32(priv->flags, &priv->regs->sfb2ad,
1078                              priv->amba_base[3] + amba_size_per_chip);
1079                 break;
1080         default:
1081                 debug("Error: Unsupported chipselect number %u!\n",
1082                       priv->num_chipselect);
1083                 qspi_module_disable(priv, 1);
1084                 return -EINVAL;
1085         }
1086
1087         qspi_set_lut(priv);
1088
1089 #ifdef CONFIG_SYS_FSL_QSPI_AHB
1090         qspi_init_ahb_read(priv);
1091 #endif
1092
1093         qspi_module_disable(priv, 0);
1094
1095         return 0;
1096 }
1097
1098 static int fsl_qspi_ofdata_to_platdata(struct udevice *bus)
1099 {
1100         struct fdt_resource res_regs, res_mem;
1101         struct fsl_qspi_platdata *plat = bus->platdata;
1102         const void *blob = gd->fdt_blob;
1103         int node = dev_of_offset(bus);
1104         int ret, flash_num = 0, subnode;
1105
1106         if (fdtdec_get_bool(blob, node, "big-endian"))
1107                 plat->flags |= QSPI_FLAG_REGMAP_ENDIAN_BIG;
1108
1109         ret = fdt_get_named_resource(blob, node, "reg", "reg-names",
1110                                      "QuadSPI", &res_regs);
1111         if (ret) {
1112                 debug("Error: can't get regs base addresses(ret = %d)!\n", ret);
1113                 return -ENOMEM;
1114         }
1115         ret = fdt_get_named_resource(blob, node, "reg", "reg-names",
1116                                      "QuadSPI-memory", &res_mem);
1117         if (ret) {
1118                 debug("Error: can't get AMBA base addresses(ret = %d)!\n", ret);
1119                 return -ENOMEM;
1120         }
1121
1122         /* Count flash numbers */
1123         fdt_for_each_subnode(subnode, blob, node)
1124                 ++flash_num;
1125
1126         if (flash_num == 0) {
1127                 debug("Error: Missing flashes!\n");
1128                 return -ENODEV;
1129         }
1130
1131         plat->speed_hz = fdtdec_get_int(blob, node, "spi-max-frequency",
1132                                         FSL_QSPI_DEFAULT_SCK_FREQ);
1133         plat->num_chipselect = fdtdec_get_int(blob, node, "num-cs",
1134                                               FSL_QSPI_MAX_CHIPSELECT_NUM);
1135
1136         plat->reg_base = res_regs.start;
1137         plat->amba_base = res_mem.start;
1138         plat->amba_total_size = res_mem.end - res_mem.start + 1;
1139         plat->flash_num = flash_num;
1140
1141         debug("%s: regs=<0x%llx> <0x%llx, 0x%llx>, max-frequency=%d, endianess=%s\n",
1142               __func__,
1143               (u64)plat->reg_base,
1144               (u64)plat->amba_base,
1145               (u64)plat->amba_total_size,
1146               plat->speed_hz,
1147               plat->flags & QSPI_FLAG_REGMAP_ENDIAN_BIG ? "be" : "le"
1148               );
1149
1150         return 0;
1151 }
1152
1153 static int fsl_qspi_xfer(struct udevice *dev, unsigned int bitlen,
1154                 const void *dout, void *din, unsigned long flags)
1155 {
1156         struct fsl_qspi_priv *priv;
1157         struct udevice *bus;
1158
1159         bus = dev->parent;
1160         priv = dev_get_priv(bus);
1161
1162         return qspi_xfer(priv, bitlen, dout, din, flags);
1163 }
1164
1165 static int fsl_qspi_claim_bus(struct udevice *dev)
1166 {
1167         struct fsl_qspi_priv *priv;
1168         struct udevice *bus;
1169         struct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev);
1170         int ret;
1171
1172         bus = dev->parent;
1173         priv = dev_get_priv(bus);
1174
1175         /* make sure controller is not busy anywhere */
1176         ret = wait_for_bit(__func__, &priv->regs->sr,
1177                            QSPI_SR_BUSY_MASK |
1178                            QSPI_SR_AHB_ACC_MASK |
1179                            QSPI_SR_IP_ACC_MASK,
1180                            false, 100, false);
1181
1182         if (ret) {
1183                 debug("ERROR : The controller is busy\n");
1184                 return ret;
1185         }
1186
1187         priv->cur_amba_base = priv->amba_base[slave_plat->cs];
1188
1189         qspi_module_disable(priv, 0);
1190
1191         return 0;
1192 }
1193
1194 static int fsl_qspi_release_bus(struct udevice *dev)
1195 {
1196         struct fsl_qspi_priv *priv;
1197         struct udevice *bus;
1198
1199         bus = dev->parent;
1200         priv = dev_get_priv(bus);
1201
1202         qspi_module_disable(priv, 1);
1203
1204         return 0;
1205 }
1206
1207 static int fsl_qspi_set_speed(struct udevice *bus, uint speed)
1208 {
1209         /* Nothing to do */
1210         return 0;
1211 }
1212
1213 static int fsl_qspi_set_mode(struct udevice *bus, uint mode)
1214 {
1215         /* Nothing to do */
1216         return 0;
1217 }
1218
1219 static const struct dm_spi_ops fsl_qspi_ops = {
1220         .claim_bus      = fsl_qspi_claim_bus,
1221         .release_bus    = fsl_qspi_release_bus,
1222         .xfer           = fsl_qspi_xfer,
1223         .set_speed      = fsl_qspi_set_speed,
1224         .set_mode       = fsl_qspi_set_mode,
1225 };
1226
1227 static const struct udevice_id fsl_qspi_ids[] = {
1228         { .compatible = "fsl,vf610-qspi" },
1229         { .compatible = "fsl,imx6sx-qspi" },
1230         { }
1231 };
1232
1233 U_BOOT_DRIVER(fsl_qspi) = {
1234         .name   = "fsl_qspi",
1235         .id     = UCLASS_SPI,
1236         .of_match = fsl_qspi_ids,
1237         .ops    = &fsl_qspi_ops,
1238         .ofdata_to_platdata = fsl_qspi_ofdata_to_platdata,
1239         .platdata_auto_alloc_size = sizeof(struct fsl_qspi_platdata),
1240         .priv_auto_alloc_size = sizeof(struct fsl_qspi_priv),
1241         .probe  = fsl_qspi_probe,
1242         .child_pre_probe = fsl_qspi_child_pre_probe,
1243 };
1244 #endif