drivers/spi/ti_qspi.c

   1 // SPDX-License-Identifier: GPL-2.0+
   2 /*
   3  * TI QSPI driver
   4  *
   5  * Copyright (C) 2013, Texas Instruments, Incorporated
   6  */
   7
   8 #include <common.h>
   9 #include <asm/io.h>
  10 #include <asm/arch/omap.h>
  11 #include <malloc.h>
  12 #include <spi.h>
  13 #include <dm.h>
  14 #include <asm/gpio.h>
  15 #include <asm/omap_gpio.h>
  16 #include <asm/omap_common.h>
  17 #include <asm/ti-common/ti-edma3.h>
  18 #include <linux/kernel.h>
  19 #include <regmap.h>
  20 #include <syscon.h>
  21
  22 DECLARE_GLOBAL_DATA_PTR;
  23
  24 /* ti qpsi register bit masks */
  25 #define QSPI_TIMEOUT                    2000000
  26 #define QSPI_FCLK                       192000000
  27 #define QSPI_DRA7XX_FCLK                76800000
  28 #define QSPI_WLEN_MAX_BITS              128
  29 #define QSPI_WLEN_MAX_BYTES             (QSPI_WLEN_MAX_BITS >> 3)
  30 #define QSPI_WLEN_MASK                  QSPI_WLEN(QSPI_WLEN_MAX_BITS)
  31 /* clock control */
  32 #define QSPI_CLK_EN                     BIT(31)
  33 #define QSPI_CLK_DIV_MAX                0xffff
  34 /* command */
  35 #define QSPI_EN_CS(n)                   (n << 28)
  36 #define QSPI_WLEN(n)                    ((n-1) << 19)
  37 #define QSPI_3_PIN                      BIT(18)
  38 #define QSPI_RD_SNGL                    BIT(16)
  39 #define QSPI_WR_SNGL                    (2 << 16)
  40 #define QSPI_INVAL                      (4 << 16)
  41 #define QSPI_RD_QUAD                    (7 << 16)
  42 /* device control */
  43 #define QSPI_DD(m, n)                   (m << (3 + n*8))
  44 #define QSPI_CKPHA(n)                   (1 << (2 + n*8))
  45 #define QSPI_CSPOL(n)                   (1 << (1 + n*8))
  46 #define QSPI_CKPOL(n)                   (1 << (n*8))
  47 /* status */
  48 #define QSPI_WC                         BIT(1)
  49 #define QSPI_BUSY                       BIT(0)
  50 #define QSPI_WC_BUSY                    (QSPI_WC | QSPI_BUSY)
  51 #define QSPI_XFER_DONE                  QSPI_WC
  52 #define MM_SWITCH                       0x01
  53 #define MEM_CS(cs)                      ((cs + 1) << 8)
  54 #define MEM_CS_UNSELECT                 0xfffff8ff
  55 #define MMAP_START_ADDR_DRA             0x5c000000
  56 #define MMAP_START_ADDR_AM43x           0x30000000
  57 #define CORE_CTRL_IO                    0x4a002558
  58
  59 #define QSPI_CMD_READ                   (0x3 << 0)
  60 #define QSPI_CMD_READ_DUAL              (0x6b << 0)
  61 #define QSPI_CMD_READ_QUAD              (0x6c << 0)
  62 #define QSPI_CMD_READ_FAST              (0x0b << 0)
  63 #define QSPI_SETUP0_NUM_A_BYTES         (0x3 << 8)
  64 #define QSPI_SETUP0_NUM_D_BYTES_NO_BITS (0x0 << 10)
  65 #define QSPI_SETUP0_NUM_D_BYTES_8_BITS  (0x1 << 10)
  66 #define QSPI_SETUP0_READ_NORMAL         (0x0 << 12)
  67 #define QSPI_SETUP0_READ_DUAL           (0x1 << 12)
  68 #define QSPI_SETUP0_READ_QUAD           (0x3 << 12)
  69 #define QSPI_CMD_WRITE                  (0x12 << 16)
  70 #define QSPI_NUM_DUMMY_BITS             (0x0 << 24)
  71
  72 /* ti qspi register set */
  73 struct ti_qspi_regs {
  74         u32 pid;
  75         u32 pad0[3];
  76         u32 sysconfig;
  77         u32 pad1[3];
  78         u32 int_stat_raw;
  79         u32 int_stat_en;
  80         u32 int_en_set;
  81         u32 int_en_ctlr;
  82         u32 intc_eoi;
  83         u32 pad2[3];
  84         u32 clk_ctrl;
  85         u32 dc;
  86         u32 cmd;
  87         u32 status;
  88         u32 data;
  89         u32 setup0;
  90         u32 setup1;
  91         u32 setup2;
  92         u32 setup3;
  93         u32 memswitch;
  94         u32 data1;
  95         u32 data2;
  96         u32 data3;
  97 };
  98
  99 /* ti qspi priv */
 100 struct ti_qspi_priv {
 101 #ifndef CONFIG_DM_SPI
 102         struct spi_slave slave;
 103 #else
 104         void *memory_map;
 105         uint max_hz;
 106         u32 num_cs;
 107 #endif
 108         struct ti_qspi_regs *base;
 109         void *ctrl_mod_mmap;
 110         ulong fclk;
 111         unsigned int mode;
 112         u32 cmd;
 113         u32 dc;
 114 };
 115
 116 static void ti_spi_set_speed(struct ti_qspi_priv *priv, uint hz)
 117 {
 118         uint clk_div;
 119
 120         if (!hz)
 121                 clk_div = 0;
 122         else
 123                 clk_div = DIV_ROUND_UP(priv->fclk, hz) - 1;
 124
 125         /* truncate clk_div value to QSPI_CLK_DIV_MAX */
 126         if (clk_div > QSPI_CLK_DIV_MAX)
 127                 clk_div = QSPI_CLK_DIV_MAX;
 128
 129         debug("ti_spi_set_speed: hz: %d, clock divider %d\n", hz, clk_div);
 130
 131         /* disable SCLK */
 132         writel(readl(&priv->base->clk_ctrl) & ~QSPI_CLK_EN,
 133                &priv->base->clk_ctrl);
 134         /* enable SCLK and program the clk divider */
 135         writel(QSPI_CLK_EN | clk_div, &priv->base->clk_ctrl);
 136 }
 137
 138 static void ti_qspi_cs_deactivate(struct ti_qspi_priv *priv)
 139 {
 140         writel(priv->cmd | QSPI_INVAL, &priv->base->cmd);
 141         /* dummy readl to ensure bus sync */
 142         readl(&priv->base->cmd);
 143 }
 144
 145 static int __ti_qspi_set_mode(struct ti_qspi_priv *priv, unsigned int mode)
 146 {
 147         priv->dc = 0;
 148         if (mode & SPI_CPHA)
 149                 priv->dc |= QSPI_CKPHA(0);
 150         if (mode & SPI_CPOL)
 151                 priv->dc |= QSPI_CKPOL(0);
 152         if (mode & SPI_CS_HIGH)
 153                 priv->dc |= QSPI_CSPOL(0);
 154
 155         return 0;
 156 }
 157
 158 static int __ti_qspi_claim_bus(struct ti_qspi_priv *priv, int cs)
 159 {
 160         writel(priv->dc, &priv->base->dc);
 161         writel(0, &priv->base->cmd);
 162         writel(0, &priv->base->data);
 163
 164         priv->dc <<= cs * 8;
 165         writel(priv->dc, &priv->base->dc);
 166
 167         return 0;
 168 }
 169
 170 static void __ti_qspi_release_bus(struct ti_qspi_priv *priv)
 171 {
 172         writel(0, &priv->base->dc);
 173         writel(0, &priv->base->cmd);
 174         writel(0, &priv->base->data);
 175 }
 176
 177 static void ti_qspi_ctrl_mode_mmap(void *ctrl_mod_mmap, int cs, bool enable)
 178 {
 179         u32 val;
 180
 181         val = readl(ctrl_mod_mmap);
 182         if (enable)
 183                 val |= MEM_CS(cs);
 184         else
 185                 val &= MEM_CS_UNSELECT;
 186         writel(val, ctrl_mod_mmap);
 187 }
 188
 189 static int __ti_qspi_xfer(struct ti_qspi_priv *priv, unsigned int bitlen,
 190                         const void *dout, void *din, unsigned long flags,
 191                         u32 cs)
 192 {
 193         uint words = bitlen >> 3; /* fixed 8-bit word length */
 194         const uchar *txp = dout;
 195         uchar *rxp = din;
 196         uint status;
 197         int timeout;
 198
 199         /* Setup mmap flags */
 200         if (flags & SPI_XFER_MMAP) {
 201                 writel(MM_SWITCH, &priv->base->memswitch);
 202                 if (priv->ctrl_mod_mmap)
 203                         ti_qspi_ctrl_mode_mmap(priv->ctrl_mod_mmap, cs, true);
 204                 return 0;
 205         } else if (flags & SPI_XFER_MMAP_END) {
 206                 writel(~MM_SWITCH, &priv->base->memswitch);
 207                 if (priv->ctrl_mod_mmap)
 208                         ti_qspi_ctrl_mode_mmap(priv->ctrl_mod_mmap, cs, false);
 209                 return 0;
 210         }
 211
 212         if (bitlen == 0)
 213                 return -1;
 214
 215         if (bitlen % 8) {
 216                 debug("spi_xfer: Non byte aligned SPI transfer\n");
 217                 return -1;
 218         }
 219
 220         /* Setup command reg */
 221         priv->cmd = 0;
 222         priv->cmd |= QSPI_WLEN(8);
 223         priv->cmd |= QSPI_EN_CS(cs);
 224         if (priv->mode & SPI_3WIRE)
 225                 priv->cmd |= QSPI_3_PIN;
 226         priv->cmd |= 0xfff;
 227
 228         while (words) {
 229                 u8 xfer_len = 0;
 230
 231                 if (txp) {
 232                         u32 cmd = priv->cmd;
 233
 234                         if (words >= QSPI_WLEN_MAX_BYTES) {
 235                                 u32 *txbuf = (u32 *)txp;
 236                                 u32 data;
 237
 238                                 data = cpu_to_be32(*txbuf++);
 239                                 writel(data, &priv->base->data3);
 240                                 data = cpu_to_be32(*txbuf++);
 241                                 writel(data, &priv->base->data2);
 242                                 data = cpu_to_be32(*txbuf++);
 243                                 writel(data, &priv->base->data1);
 244                                 data = cpu_to_be32(*txbuf++);
 245                                 writel(data, &priv->base->data);
 246                                 cmd &= ~QSPI_WLEN_MASK;
 247                                 cmd |= QSPI_WLEN(QSPI_WLEN_MAX_BITS);
 248                                 xfer_len = QSPI_WLEN_MAX_BYTES;
 249                         } else {
 250                                 writeb(*txp, &priv->base->data);
 251                                 xfer_len = 1;
 252                         }
 253                         debug("tx cmd %08x dc %08x\n",
 254                               cmd | QSPI_WR_SNGL, priv->dc);
 255                         writel(cmd | QSPI_WR_SNGL, &priv->base->cmd);
 256                         status = readl(&priv->base->status);
 257                         timeout = QSPI_TIMEOUT;
 258                         while ((status & QSPI_WC_BUSY) != QSPI_XFER_DONE) {
 259                                 if (--timeout < 0) {
 260                                         printf("spi_xfer: TX timeout!\n");
 261                                         return -1;
 262                                 }
 263                                 status = readl(&priv->base->status);
 264                         }
 265                         txp += xfer_len;
 266                         debug("tx done, status %08x\n", status);
 267                 }
 268                 if (rxp) {
 269                         debug("rx cmd %08x dc %08x\n",
 270                               ((u32)(priv->cmd | QSPI_RD_SNGL)), priv->dc);
 271                         writel(priv->cmd | QSPI_RD_SNGL, &priv->base->cmd);
 272                         status = readl(&priv->base->status);
 273                         timeout = QSPI_TIMEOUT;
 274                         while ((status & QSPI_WC_BUSY) != QSPI_XFER_DONE) {
 275                                 if (--timeout < 0) {
 276                                         printf("spi_xfer: RX timeout!\n");
 277                                         return -1;
 278                                 }
 279                                 status = readl(&priv->base->status);
 280                         }
 281                         *rxp++ = readl(&priv->base->data);
 282                         xfer_len = 1;
 283                         debug("rx done, status %08x, read %02x\n",
 284                               status, *(rxp-1));
 285                 }
 286                 words -= xfer_len;
 287         }
 288
 289         /* Terminate frame */
 290         if (flags & SPI_XFER_END)
 291                 ti_qspi_cs_deactivate(priv);
 292
 293         return 0;
 294 }
 295
 296 /* TODO: control from sf layer to here through dm-spi */
 297 #if defined(CONFIG_TI_EDMA3) && !defined(CONFIG_DMA)
 298 void spi_flash_copy_mmap(void *data, void *offset, size_t len)
 299 {
 300         unsigned int                    addr = (unsigned int) (data);
 301         unsigned int                    edma_slot_num = 1;
 302
 303         /* Invalidate the area, so no writeback into the RAM races with DMA */
 304         invalidate_dcache_range(addr, addr + roundup(len, ARCH_DMA_MINALIGN));
 305
 306         /* enable edma3 clocks */
 307         enable_edma3_clocks();
 308
 309         /* Call edma3 api to do actual DMA transfer     */
 310         edma3_transfer(EDMA3_BASE, edma_slot_num, data, offset, len);
 311
 312         /* disable edma3 clocks */
 313         disable_edma3_clocks();
 314
 315         *((unsigned int *)offset) += len;
 316 }
 317 #endif
 318
 319 #ifndef CONFIG_DM_SPI
 320
 321 static inline struct ti_qspi_priv *to_ti_qspi_priv(struct spi_slave *slave)
 322 {
 323         return container_of(slave, struct ti_qspi_priv, slave);
 324 }
 325
 326 int spi_cs_is_valid(unsigned int bus, unsigned int cs)
 327 {
 328         return 1;
 329 }
 330
 331 void spi_cs_activate(struct spi_slave *slave)
 332 {
 333         /* CS handled in xfer */
 334         return;
 335 }
 336
 337 void spi_cs_deactivate(struct spi_slave *slave)
 338 {
 339         struct ti_qspi_priv *priv = to_ti_qspi_priv(slave);
 340         ti_qspi_cs_deactivate(priv);
 341 }
 342
 343 void spi_init(void)
 344 {
 345         /* nothing to do */
 346 }
 347
 348 static void ti_spi_setup_spi_register(struct ti_qspi_priv *priv)
 349 {
 350         u32 memval = 0;
 351
 352 #ifdef CONFIG_QSPI_QUAD_SUPPORT
 353         struct spi_slave *slave = &priv->slave;
 354         memval |= (QSPI_CMD_READ_QUAD | QSPI_SETUP0_NUM_A_BYTES |
 355                         QSPI_SETUP0_NUM_D_BYTES_8_BITS |
 356                         QSPI_SETUP0_READ_QUAD | QSPI_CMD_WRITE |
 357                         QSPI_NUM_DUMMY_BITS);
 358         slave->mode |= SPI_RX_QUAD;
 359 #else
 360         memval |= QSPI_CMD_READ | QSPI_SETUP0_NUM_A_BYTES |
 361                         QSPI_SETUP0_NUM_D_BYTES_NO_BITS |
 362                         QSPI_SETUP0_READ_NORMAL | QSPI_CMD_WRITE |
 363                         QSPI_NUM_DUMMY_BITS;
 364 #endif
 365
 366         writel(memval, &priv->base->setup0);
 367 }
 368
 369 struct spi_slave *spi_setup_slave(unsigned int bus, unsigned int cs,
 370                                   unsigned int max_hz, unsigned int mode)
 371 {
 372         struct ti_qspi_priv *priv;
 373
 374 #ifdef CONFIG_AM43XX
 375         gpio_request(CONFIG_QSPI_SEL_GPIO, "qspi_gpio");
 376         gpio_direction_output(CONFIG_QSPI_SEL_GPIO, 1);
 377 #endif
 378
 379         priv = spi_alloc_slave(struct ti_qspi_priv, bus, cs);
 380         if (!priv) {
 381                 printf("SPI_error: Fail to allocate ti_qspi_priv\n");
 382                 return NULL;
 383         }
 384
 385         priv->base = (struct ti_qspi_regs *)QSPI_BASE;
 386         priv->mode = mode;
 387 #if defined(CONFIG_DRA7XX)
 388         priv->ctrl_mod_mmap = (void *)CORE_CTRL_IO;
 389         priv->slave.memory_map = (void *)MMAP_START_ADDR_DRA;
 390         priv->fclk = QSPI_DRA7XX_FCLK;
 391 #else
 392         priv->slave.memory_map = (void *)MMAP_START_ADDR_AM43x;
 393         priv->fclk = QSPI_FCLK;
 394 #endif
 395
 396         ti_spi_set_speed(priv, max_hz);
 397
 398 #ifdef CONFIG_TI_SPI_MMAP
 399         ti_spi_setup_spi_register(priv);
 400 #endif
 401
 402         return &priv->slave;
 403 }
 404
 405 void spi_free_slave(struct spi_slave *slave)
 406 {
 407         struct ti_qspi_priv *priv = to_ti_qspi_priv(slave);
 408         free(priv);
 409 }
 410
 411 int spi_claim_bus(struct spi_slave *slave)
 412 {
 413         struct ti_qspi_priv *priv = to_ti_qspi_priv(slave);
 414
 415         debug("%s: bus:%i cs:%i\n", __func__, priv->slave.bus, priv->slave.cs);
 416         __ti_qspi_set_mode(priv, priv->mode);
 417         return __ti_qspi_claim_bus(priv, priv->slave.cs);
 418 }
 419 void spi_release_bus(struct spi_slave *slave)
 420 {
 421         struct ti_qspi_priv *priv = to_ti_qspi_priv(slave);
 422
 423         debug("%s: bus:%i cs:%i\n", __func__, priv->slave.bus, priv->slave.cs);
 424         __ti_qspi_release_bus(priv);
 425 }
 426
 427 int spi_xfer(struct spi_slave *slave, unsigned int bitlen, const void *dout,
 428              void *din, unsigned long flags)
 429 {
 430         struct ti_qspi_priv *priv = to_ti_qspi_priv(slave);
 431
 432         debug("spi_xfer: bus:%i cs:%i bitlen:%i flags:%lx\n",
 433               priv->slave.bus, priv->slave.cs, bitlen, flags);
 434         return __ti_qspi_xfer(priv, bitlen, dout, din, flags, priv->slave.cs);
 435 }
 436
 437 #else /* CONFIG_DM_SPI */
 438
 439 static void __ti_qspi_setup_memorymap(struct ti_qspi_priv *priv,
 440                                       struct spi_slave *slave,
 441                                       bool enable)
 442 {
 443         u32 memval;
 444         u32 mode = slave->mode & (SPI_RX_QUAD | SPI_RX_DUAL);
 445
 446         if (!enable) {
 447                 writel(0, &priv->base->setup0);
 448                 return;
 449         }
 450
 451         memval = QSPI_SETUP0_NUM_A_BYTES | QSPI_CMD_WRITE | QSPI_NUM_DUMMY_BITS;
 452
 453         switch (mode) {
 454         case SPI_RX_QUAD:
 455                 memval |= QSPI_CMD_READ_QUAD;
 456                 memval |= QSPI_SETUP0_NUM_D_BYTES_8_BITS;
 457                 memval |= QSPI_SETUP0_READ_QUAD;
 458                 slave->mode |= SPI_RX_QUAD;
 459                 break;
 460         case SPI_RX_DUAL:
 461                 memval |= QSPI_CMD_READ_DUAL;
 462                 memval |= QSPI_SETUP0_NUM_D_BYTES_8_BITS;
 463                 memval |= QSPI_SETUP0_READ_DUAL;
 464                 break;
 465         default:
 466                 memval |= QSPI_CMD_READ;
 467                 memval |= QSPI_SETUP0_NUM_D_BYTES_NO_BITS;
 468                 memval |= QSPI_SETUP0_READ_NORMAL;
 469                 break;
 470         }
 471
 472         writel(memval, &priv->base->setup0);
 473 }
 474
 475
 476 static int ti_qspi_set_speed(struct udevice *bus, uint max_hz)
 477 {
 478         struct ti_qspi_priv *priv = dev_get_priv(bus);
 479
 480         ti_spi_set_speed(priv, max_hz);
 481
 482         return 0;
 483 }
 484
 485 static int ti_qspi_set_mode(struct udevice *bus, uint mode)
 486 {
 487         struct ti_qspi_priv *priv = dev_get_priv(bus);
 488         return __ti_qspi_set_mode(priv, mode);
 489 }
 490
 491 static int ti_qspi_claim_bus(struct udevice *dev)
 492 {
 493         struct dm_spi_slave_platdata *slave_plat = dev_get_parent_platdata(dev);
 494         struct spi_slave *slave = dev_get_parent_priv(dev);
 495         struct ti_qspi_priv *priv;
 496         struct udevice *bus;
 497
 498         bus = dev->parent;
 499         priv = dev_get_priv(bus);
 500
 501         if (slave_plat->cs > priv->num_cs) {
 502                 debug("invalid qspi chip select\n");
 503                 return -EINVAL;
 504         }
 505
 506         __ti_qspi_setup_memorymap(priv, slave, true);
 507
 508         return __ti_qspi_claim_bus(priv, slave_plat->cs);
 509 }
 510
 511 static int ti_qspi_release_bus(struct udevice *dev)
 512 {
 513         struct spi_slave *slave = dev_get_parent_priv(dev);
 514         struct ti_qspi_priv *priv;
 515         struct udevice *bus;
 516
 517         bus = dev->parent;
 518         priv = dev_get_priv(bus);
 519
 520         __ti_qspi_setup_memorymap(priv, slave, false);
 521         __ti_qspi_release_bus(priv);
 522
 523         return 0;
 524 }
 525
 526 static int ti_qspi_xfer(struct udevice *dev, unsigned int bitlen,
 527                         const void *dout, void *din, unsigned long flags)
 528 {
 529         struct dm_spi_slave_platdata *slave = dev_get_parent_platdata(dev);
 530         struct ti_qspi_priv *priv;
 531         struct udevice *bus;
 532
 533         bus = dev->parent;
 534         priv = dev_get_priv(bus);
 535
 536         if (slave->cs > priv->num_cs) {
 537                 debug("invalid qspi chip select\n");
 538                 return -EINVAL;
 539         }
 540
 541         return __ti_qspi_xfer(priv, bitlen, dout, din, flags, slave->cs);
 542 }
 543
 544 static int ti_qspi_probe(struct udevice *bus)
 545 {
 546         struct ti_qspi_priv *priv = dev_get_priv(bus);
 547
 548         priv->fclk = dev_get_driver_data(bus);
 549
 550         return 0;
 551 }
 552
 553 static void *map_syscon_chipselects(struct udevice *bus)
 554 {
 555 #if CONFIG_IS_ENABLED(SYSCON)
 556         struct udevice *syscon;
 557         struct regmap *regmap;
 558         const fdt32_t *cell;
 559         int len, err;
 560
 561         err = uclass_get_device_by_phandle(UCLASS_SYSCON, bus,
 562                                            "syscon-chipselects", &syscon);
 563         if (err) {
 564                 debug("%s: unable to find syscon device (%d)\n", __func__,
 565                       err);
 566                 return NULL;
 567         }
 568
 569         regmap = syscon_get_regmap(syscon);
 570         if (IS_ERR(regmap)) {
 571                 debug("%s: unable to find regmap (%ld)\n", __func__,
 572                       PTR_ERR(regmap));
 573                 return NULL;
 574         }
 575
 576         cell = fdt_getprop(gd->fdt_blob, dev_of_offset(bus),
 577                            "syscon-chipselects", &len);
 578         if (len < 2*sizeof(fdt32_t)) {
 579                 debug("%s: offset not available\n", __func__);
 580                 return NULL;
 581         }
 582
 583         return fdtdec_get_number(cell + 1, 1) + regmap_get_range(regmap, 0);
 584 #else
 585         fdt_addr_t addr;
 586         addr = devfdt_get_addr_index(bus, 2);
 587         return (addr == FDT_ADDR_T_NONE) ? NULL :
 588                 map_physmem(addr, 0, MAP_NOCACHE);
 589 #endif
 590 }
 591
 592 static int ti_qspi_ofdata_to_platdata(struct udevice *bus)
 593 {
 594         struct ti_qspi_priv *priv = dev_get_priv(bus);
 595         const void *blob = gd->fdt_blob;
 596         int node = dev_of_offset(bus);
 597
 598         priv->ctrl_mod_mmap = map_syscon_chipselects(bus);
 599         priv->base = map_physmem(devfdt_get_addr(bus),
 600                                  sizeof(struct ti_qspi_regs), MAP_NOCACHE);
 601         priv->memory_map = map_physmem(devfdt_get_addr_index(bus, 1), 0,
 602                                        MAP_NOCACHE);
 603
 604         priv->max_hz = fdtdec_get_int(blob, node, "spi-max-frequency", -1);
 605         if (priv->max_hz < 0) {
 606                 debug("Error: Max frequency missing\n");
 607                 return -ENODEV;
 608         }
 609         priv->num_cs = fdtdec_get_int(blob, node, "num-cs", 4);
 610
 611         debug("%s: regs=<0x%x>, max-frequency=%d\n", __func__,
 612               (int)priv->base, priv->max_hz);
 613
 614         return 0;
 615 }
 616
 617 static int ti_qspi_child_pre_probe(struct udevice *dev)
 618 {
 619         struct spi_slave *slave = dev_get_parent_priv(dev);
 620         struct udevice *bus = dev_get_parent(dev);
 621         struct ti_qspi_priv *priv = dev_get_priv(bus);
 622
 623         slave->memory_map = priv->memory_map;
 624         return 0;
 625 }
 626
 627 static const struct dm_spi_ops ti_qspi_ops = {
 628         .claim_bus      = ti_qspi_claim_bus,
 629         .release_bus    = ti_qspi_release_bus,
 630         .xfer           = ti_qspi_xfer,
 631         .set_speed      = ti_qspi_set_speed,
 632         .set_mode       = ti_qspi_set_mode,
 633 };
 634
 635 static const struct udevice_id ti_qspi_ids[] = {
 636         { .compatible = "ti,dra7xxx-qspi",      .data = QSPI_DRA7XX_FCLK},
 637         { .compatible = "ti,am4372-qspi",       .data = QSPI_FCLK},
 638         { }
 639 };
 640
 641 U_BOOT_DRIVER(ti_qspi) = {
 642         .name   = "ti_qspi",
 643         .id     = UCLASS_SPI,
 644         .of_match = ti_qspi_ids,
 645         .ops    = &ti_qspi_ops,
 646         .ofdata_to_platdata = ti_qspi_ofdata_to_platdata,
 647         .priv_auto_alloc_size = sizeof(struct ti_qspi_priv),
 648         .probe  = ti_qspi_probe,
 649         .child_pre_probe = ti_qspi_child_pre_probe,
 650 };
 651 #endif /* CONFIG_DM_SPI */