/*
   * Copyright (c) 2011 The Chromium OS Authors.

   * SPDX-License-Identifier:	GPL-2.0+

   */

  #ifndef USE_HOSTCC

  #include <common.h>

  #include <boot_fit.h>

  #include <dm.h>

  #include <dm/of_extra.h>

  #include <errno.h>

  #include <fdtdec.h>

  #include <fdt_support.h>

  #include <linux/libfdt.h>

  #include <serial.h>

  #include <asm/sections.h>

  #include <linux/ctype.h>

  #include <linux/lzo.h>

  
  DECLARE_GLOBAL_DATA_PTR;
  
  /*
   * Here are the type we know about. One day we might allow drivers to
   * register. For now we just put them here. The COMPAT macro allows us to
   * turn this into a sparse list later, and keeps the ID with the name.

   *
   * NOTE: This list is basically a TODO list for things that need to be
   * converted to driver model. So don't add new things here unless there is a
   * good reason why driver-model conversion is infeasible. Examples include
   * things which are used before driver model is available.

   */
  #define COMPAT(id, name) name
  static const char * const compat_names[COMPAT_COUNT] = {

  	COMPAT(UNKNOWN, "<none>"),

  	COMPAT(NVIDIA_TEGRA20_EMC, "nvidia,tegra20-emc"),
  	COMPAT(NVIDIA_TEGRA20_EMC_TABLE, "nvidia,tegra20-emc-table"),

  	COMPAT(NVIDIA_TEGRA20_NAND, "nvidia,tegra20-nand"),

  	COMPAT(NVIDIA_TEGRA124_XUSB_PADCTL, "nvidia,tegra124-xusb-padctl"),

  	COMPAT(NVIDIA_TEGRA210_XUSB_PADCTL, "nvidia,tegra210-xusb-padctl"),

  	COMPAT(SMSC_LAN9215, "smsc,lan9215"),
  	COMPAT(SAMSUNG_EXYNOS5_SROMC, "samsung,exynos-sromc"),

  	COMPAT(SAMSUNG_S3C2440_I2C, "samsung,s3c2440-i2c"),

  	COMPAT(SAMSUNG_EXYNOS5_SOUND, "samsung,exynos-sound"),
  	COMPAT(WOLFSON_WM8994_CODEC, "wolfson,wm8994-codec"),

  	COMPAT(SAMSUNG_EXYNOS_USB_PHY, "samsung,exynos-usb-phy"),

  	COMPAT(SAMSUNG_EXYNOS5_USB3_PHY, "samsung,exynos5250-usb3-phy"),

  	COMPAT(SAMSUNG_EXYNOS_TMU, "samsung,exynos-tmu"),

  	COMPAT(SAMSUNG_EXYNOS_MIPI_DSI, "samsung,exynos-mipi-dsi"),

  	COMPAT(SAMSUNG_EXYNOS_DWMMC, "samsung,exynos-dwmmc"),

  	COMPAT(SAMSUNG_EXYNOS_MMC, "samsung,exynos-mmc"),

  	COMPAT(MAXIM_MAX77686_PMIC, "maxim,max77686"),

  	COMPAT(GENERIC_SPI_FLASH, "spi-flash"),

  	COMPAT(MAXIM_98095_CODEC, "maxim,max98095-codec"),

  	COMPAT(SAMSUNG_EXYNOS5_I2C, "samsung,exynos5-hsi2c"),

  	COMPAT(SAMSUNG_EXYNOS_SYSMMU, "samsung,sysmmu-v3.3"),

  	COMPAT(INTEL_MICROCODE, "intel,microcode"),

  	COMPAT(AMS_AS3722, "ams,as3722"),

  	COMPAT(INTEL_QRK_MRC, "intel,quark-mrc"),

  	COMPAT(ALTERA_SOCFPGA_DWMAC, "altr,socfpga-stmmac"),

  	COMPAT(ALTERA_SOCFPGA_DWMMC, "altr,socfpga-dw-mshc"),

  	COMPAT(ALTERA_SOCFPGA_DWC2USB, "snps,dwc2"),

  	COMPAT(INTEL_BAYTRAIL_FSP, "intel,baytrail-fsp"),
  	COMPAT(INTEL_BAYTRAIL_FSP_MDP, "intel,baytrail-fsp-mdp"),
  	COMPAT(INTEL_IVYBRIDGE_FSP, "intel,ivybridge-fsp"),

  	COMPAT(COMPAT_SUNXI_NAND, "allwinner,sun4i-a10-nand"),

  	COMPAT(ALTERA_SOCFPGA_CLK, "altr,clk-mgr"),
  	COMPAT(ALTERA_SOCFPGA_PINCTRL_SINGLE, "pinctrl-single"),
  	COMPAT(ALTERA_SOCFPGA_H2F_BRG, "altr,socfpga-hps2fpga-bridge"),
  	COMPAT(ALTERA_SOCFPGA_LWH2F_BRG, "altr,socfpga-lwhps2fpga-bridge"),
  	COMPAT(ALTERA_SOCFPGA_F2H_BRG, "altr,socfpga-fpga2hps-bridge"),
  	COMPAT(ALTERA_SOCFPGA_F2SDR0, "altr,socfpga-fpga2sdram0-bridge"),
  	COMPAT(ALTERA_SOCFPGA_F2SDR1, "altr,socfpga-fpga2sdram1-bridge"),
  	COMPAT(ALTERA_SOCFPGA_F2SDR2, "altr,socfpga-fpga2sdram2-bridge"),

  	COMPAT(ALTERA_SOCFPGA_FPGA0, "altr,socfpga-a10-fpga-mgr"),
  	COMPAT(ALTERA_SOCFPGA_NOC, "altr,socfpga-a10-noc"),

  };

  const char *fdtdec_get_compatible(enum fdt_compat_id id)
  {
  	/* We allow reading of the 'unknown' ID for testing purposes */
  	assert(id >= 0 && id < COMPAT_COUNT);
  	return compat_names[id];
  }

  fdt_addr_t fdtdec_get_addr_size_fixed(const void *blob, int node,

  				      const char *prop_name, int index, int na,
  				      int ns, fdt_size_t *sizep,
  				      bool translate)

  {

  	const fdt32_t *prop, *prop_end;
  	const fdt32_t *prop_addr, *prop_size, *prop_after_size;

  	int len;

  	fdt_addr_t addr;

  	debug("%s: %s: ", __func__, prop_name);

  
  	if (na > (sizeof(fdt_addr_t) / sizeof(fdt32_t))) {
  		debug("(na too large for fdt_addr_t type)
  ");
  		return FDT_ADDR_T_NONE;
  	}
  
  	if (ns > (sizeof(fdt_size_t) / sizeof(fdt32_t))) {
  		debug("(ns too large for fdt_size_t type)
  ");
  		return FDT_ADDR_T_NONE;
  	}
  
  	prop = fdt_getprop(blob, node, prop_name, &len);
  	if (!prop) {
  		debug("(not found)
  ");
  		return FDT_ADDR_T_NONE;
  	}
  	prop_end = prop + (len / sizeof(*prop));
  
  	prop_addr = prop + (index * (na + ns));
  	prop_size = prop_addr + na;
  	prop_after_size = prop_size + ns;
  	if (prop_after_size > prop_end) {
  		debug("(not enough data: expected >= %d cells, got %d cells)
  ",
  		      (u32)(prop_after_size - prop), ((u32)(prop_end - prop)));
  		return FDT_ADDR_T_NONE;
  	}

  #if CONFIG_IS_ENABLED(OF_TRANSLATE)

  	if (translate)
  		addr = fdt_translate_address(blob, node, prop_addr);
  	else
  #endif
  		addr = fdtdec_get_number(prop_addr, na);

  
  	if (sizep) {
  		*sizep = fdtdec_get_number(prop_size, ns);

  		debug("addr=%08llx, size=%llx
  ", (unsigned long long)addr,
  		      (unsigned long long)*sizep);

  	} else {

  		debug("addr=%08llx
  ", (unsigned long long)addr);

  	}
  
  	return addr;
  }
  
  fdt_addr_t fdtdec_get_addr_size_auto_parent(const void *blob, int parent,

  					    int node, const char *prop_name,
  					    int index, fdt_size_t *sizep,
  					    bool translate)

  {
  	int na, ns;
  
  	debug("%s: ", __func__);
  
  	na = fdt_address_cells(blob, parent);
  	if (na < 1) {
  		debug("(bad #address-cells)
  ");
  		return FDT_ADDR_T_NONE;
  	}
  
  	ns = fdt_size_cells(blob, parent);

  	if (ns < 0) {

  		debug("(bad #size-cells)
  ");
  		return FDT_ADDR_T_NONE;
  	}
  
  	debug("na=%d, ns=%d, ", na, ns);
  
  	return fdtdec_get_addr_size_fixed(blob, node, prop_name, index, na,

  					  ns, sizep, translate);

  }
  
  fdt_addr_t fdtdec_get_addr_size_auto_noparent(const void *blob, int node,

  					      const char *prop_name, int index,
  					      fdt_size_t *sizep,
  					      bool translate)

  {
  	int parent;
  
  	debug("%s: ", __func__);
  
  	parent = fdt_parent_offset(blob, node);
  	if (parent < 0) {
  		debug("(no parent found)
  ");
  		return FDT_ADDR_T_NONE;

  	}

  
  	return fdtdec_get_addr_size_auto_parent(blob, parent, node, prop_name,

  						index, sizep, translate);

  }
  
  fdt_addr_t fdtdec_get_addr_size(const void *blob, int node,

  				const char *prop_name, fdt_size_t *sizep)

  {

  	int ns = sizep ? (sizeof(fdt_size_t) / sizeof(fdt32_t)) : 0;

  	return fdtdec_get_addr_size_fixed(blob, node, prop_name, 0,
  					  sizeof(fdt_addr_t) / sizeof(fdt32_t),

  					  ns, sizep, false);

  }

  fdt_addr_t fdtdec_get_addr(const void *blob, int node, const char *prop_name)

  {
  	return fdtdec_get_addr_size(blob, node, prop_name, NULL);
  }

  #if defined(CONFIG_PCI) && defined(CONFIG_DM_PCI)

  int fdtdec_get_pci_addr(const void *blob, int node, enum fdt_pci_space type,

  			const char *prop_name, struct fdt_pci_addr *addr)

  {
  	const u32 *cell;
  	int len;
  	int ret = -ENOENT;
  
  	debug("%s: %s: ", __func__, prop_name);
  
  	/*
  	 * If we follow the pci bus bindings strictly, we should check
  	 * the value of the node's parent node's #address-cells and
  	 * #size-cells. They need to be 3 and 2 accordingly. However,
  	 * for simplicity we skip the check here.
  	 */
  	cell = fdt_getprop(blob, node, prop_name, &len);
  	if (!cell)
  		goto fail;
  
  	if ((len % FDT_PCI_REG_SIZE) == 0) {
  		int num = len / FDT_PCI_REG_SIZE;
  		int i;
  
  		for (i = 0; i < num; i++) {
  			debug("pci address #%d: %08lx %08lx %08lx
  ", i,

  			      (ulong)fdt32_to_cpu(cell[0]),
  			      (ulong)fdt32_to_cpu(cell[1]),
  			      (ulong)fdt32_to_cpu(cell[2]));
  			if ((fdt32_to_cpu(*cell) & type) == type) {
  				addr->phys_hi = fdt32_to_cpu(cell[0]);
  				addr->phys_mid = fdt32_to_cpu(cell[1]);
  				addr->phys_lo = fdt32_to_cpu(cell[1]);

  				break;

  			}

  
  			cell += (FDT_PCI_ADDR_CELLS +
  				 FDT_PCI_SIZE_CELLS);

  		}

  		if (i == num) {
  			ret = -ENXIO;

  			goto fail;

  		}

  
  		return 0;

  	}

  	ret = -EINVAL;

  fail:
  	debug("(not found)
  ");
  	return ret;
  }
  
  int fdtdec_get_pci_vendev(const void *blob, int node, u16 *vendor, u16 *device)
  {
  	const char *list, *end;
  	int len;
  
  	list = fdt_getprop(blob, node, "compatible", &len);
  	if (!list)
  		return -ENOENT;
  
  	end = list + len;
  	while (list < end) {

  		len = strlen(list);
  		if (len >= strlen("pciVVVV,DDDD")) {

  			char *s = strstr(list, "pci");

  
  			/*
  			 * check if the string is something like pciVVVV,DDDD.RR
  			 * or just pciVVVV,DDDD
  			 */
  			if (s && s[7] == ',' &&
  			    (s[12] == '.' || s[12] == 0)) {
  				s += 3;
  				*vendor = simple_strtol(s, NULL, 16);
  
  				s += 5;
  				*device = simple_strtol(s, NULL, 16);
  
  				return 0;
  			}

  		}

  		list += (len + 1);

  	}
  
  	return -ENOENT;
  }

  int fdtdec_get_pci_bar32(struct udevice *dev, struct fdt_pci_addr *addr,
  			 u32 *bar)

  {

  	int barnum;

  
  	/* extract the bar number from fdt_pci_addr */
  	barnum = addr->phys_hi & 0xff;

  	if (barnum < PCI_BASE_ADDRESS_0 || barnum > PCI_CARDBUS_CIS)

  		return -EINVAL;
  
  	barnum = (barnum - PCI_BASE_ADDRESS_0) / 4;

  	*bar = dm_pci_read_bar32(dev, barnum);

  
  	return 0;
  }
  #endif

  uint64_t fdtdec_get_uint64(const void *blob, int node, const char *prop_name,

  			   uint64_t default_val)

  {
  	const uint64_t *cell64;
  	int length;
  
  	cell64 = fdt_getprop(blob, node, prop_name, &length);
  	if (!cell64 || length < sizeof(*cell64))
  		return default_val;
  
  	return fdt64_to_cpu(*cell64);
  }

  int fdtdec_get_is_enabled(const void *blob, int node)

  {
  	const char *cell;

  	/*
  	 * It should say "okay", so only allow that. Some fdts use "ok" but
  	 * this is a bug. Please fix your device tree source file. See here
  	 * for discussion:
  	 *
  	 * http://www.mail-archive.com/u-boot@lists.denx.de/msg71598.html
  	 */

  	cell = fdt_getprop(blob, node, "status", NULL);
  	if (cell)

  		return strcmp(cell, "okay") == 0;

  	return 1;

  }

  enum fdt_compat_id fdtdec_lookup(const void *blob, int node)

  {
  	enum fdt_compat_id id;
  
  	/* Search our drivers */
  	for (id = COMPAT_UNKNOWN; id < COMPAT_COUNT; id++)

  		if (fdt_node_check_compatible(blob, node,
  					      compat_names[id]) == 0)

  			return id;
  	return COMPAT_UNKNOWN;
  }

  int fdtdec_next_compatible(const void *blob, int node, enum fdt_compat_id id)

  {
  	return fdt_node_offset_by_compatible(blob, node, compat_names[id]);
  }

  int fdtdec_next_compatible_subnode(const void *blob, int node,

  				   enum fdt_compat_id id, int *depthp)

  {
  	do {
  		node = fdt_next_node(blob, node, depthp);
  	} while (*depthp > 1);
  
  	/* If this is a direct subnode, and compatible, return it */
  	if (*depthp == 1 && 0 == fdt_node_check_compatible(
  						blob, node, compat_names[id]))
  		return node;
  
  	return -FDT_ERR_NOTFOUND;
  }

  int fdtdec_next_alias(const void *blob, const char *name, enum fdt_compat_id id,
  		      int *upto)

  {
  #define MAX_STR_LEN 20
  	char str[MAX_STR_LEN + 20];
  	int node, err;
  
  	/* snprintf() is not available */
  	assert(strlen(name) < MAX_STR_LEN);
  	sprintf(str, "%.*s%d", MAX_STR_LEN, name, *upto);

  	node = fdt_path_offset(blob, str);

  	if (node < 0)
  		return node;
  	err = fdt_node_check_compatible(blob, node, compat_names[id]);
  	if (err < 0)
  		return err;

  	if (err)
  		return -FDT_ERR_NOTFOUND;
  	(*upto)++;
  	return node;

  }

  int fdtdec_find_aliases_for_id(const void *blob, const char *name,

  			       enum fdt_compat_id id, int *node_list,
  			       int maxcount)

  {

  	memset(node_list, '\0', sizeof(*node_list) * maxcount);
  
  	return fdtdec_add_aliases_for_id(blob, name, id, node_list, maxcount);
  }
  
  /* TODO: Can we tighten this code up a little? */
  int fdtdec_add_aliases_for_id(const void *blob, const char *name,

  			      enum fdt_compat_id id, int *node_list,
  			      int maxcount)

  {

  	int name_len = strlen(name);
  	int nodes[maxcount];
  	int num_found = 0;
  	int offset, node;
  	int alias_node;
  	int count;
  	int i, j;
  
  	/* find the alias node if present */
  	alias_node = fdt_path_offset(blob, "/aliases");
  
  	/*
  	 * start with nothing, and we can assume that the root node can't
  	 * match
  	 */
  	memset(nodes, '\0', sizeof(nodes));
  
  	/* First find all the compatible nodes */
  	for (node = count = 0; node >= 0 && count < maxcount;) {
  		node = fdtdec_next_compatible(blob, node, id);
  		if (node >= 0)
  			nodes[count++] = node;
  	}
  	if (node >= 0)
  		debug("%s: warning: maxcount exceeded with alias '%s'
  ",

  		      __func__, name);

  
  	/* Now find all the aliases */

  	for (offset = fdt_first_property_offset(blob, alias_node);
  			offset > 0;
  			offset = fdt_next_property_offset(blob, offset)) {
  		const struct fdt_property *prop;
  		const char *path;
  		int number;
  		int found;
  
  		node = 0;
  		prop = fdt_get_property_by_offset(blob, offset, NULL);
  		path = fdt_string(blob, fdt32_to_cpu(prop->nameoff));
  		if (prop->len && 0 == strncmp(path, name, name_len))
  			node = fdt_path_offset(blob, prop->data);
  		if (node <= 0)
  			continue;
  
  		/* Get the alias number */
  		number = simple_strtoul(path + name_len, NULL, 10);
  		if (number < 0 || number >= maxcount) {
  			debug("%s: warning: alias '%s' is out of range
  ",

  			      __func__, path);

  			continue;
  		}
  
  		/* Make sure the node we found is actually in our list! */
  		found = -1;
  		for (j = 0; j < count; j++)
  			if (nodes[j] == node) {
  				found = j;
  				break;
  			}
  
  		if (found == -1) {
  			debug("%s: warning: alias '%s' points to a node "
  				"'%s' that is missing or is not compatible "
  				" with '%s'
  ", __func__, path,
  				fdt_get_name(blob, node, NULL),
  			       compat_names[id]);
  			continue;
  		}
  
  		/*
  		 * Add this node to our list in the right place, and mark
  		 * it as done.
  		 */
  		if (fdtdec_get_is_enabled(blob, node)) {

  			if (node_list[number]) {
  				debug("%s: warning: alias '%s' requires that "
  				      "a node be placed in the list in a "
  				      "position which is already filled by "
  				      "node '%s'
  ", __func__, path,
  				      fdt_get_name(blob, node, NULL));
  				continue;
  			}

  			node_list[number] = node;
  			if (number >= num_found)
  				num_found = number + 1;
  		}

  		nodes[found] = 0;

  	}
  
  	/* Add any nodes not mentioned by an alias */
  	for (i = j = 0; i < maxcount; i++) {
  		if (!node_list[i]) {
  			for (; j < maxcount; j++)
  				if (nodes[j] &&

  				    fdtdec_get_is_enabled(blob, nodes[j]))

  					break;
  
  			/* Have we run out of nodes to add? */
  			if (j == maxcount)
  				break;
  
  			assert(!node_list[i]);
  			node_list[i] = nodes[j++];
  			if (i >= num_found)
  				num_found = i + 1;
  		}
  	}
  
  	return num_found;
  }

  int fdtdec_get_alias_seq(const void *blob, const char *base, int offset,
  			 int *seqp)
  {
  	int base_len = strlen(base);
  	const char *find_name;
  	int find_namelen;
  	int prop_offset;
  	int aliases;
  
  	find_name = fdt_get_name(blob, offset, &find_namelen);
  	debug("Looking for '%s' at %d, name %s
  ", base, offset, find_name);
  
  	aliases = fdt_path_offset(blob, "/aliases");
  	for (prop_offset = fdt_first_property_offset(blob, aliases);
  	     prop_offset > 0;
  	     prop_offset = fdt_next_property_offset(blob, prop_offset)) {
  		const char *prop;
  		const char *name;
  		const char *slash;

  		int len, val;

  
  		prop = fdt_getprop_by_offset(blob, prop_offset, &name, &len);
  		debug("   - %s, %s
  ", name, prop);
  		if (len < find_namelen || *prop != '/' || prop[len - 1] ||
  		    strncmp(name, base, base_len))
  			continue;
  
  		slash = strrchr(prop, '/');
  		if (strcmp(slash + 1, find_name))
  			continue;

  		val = trailing_strtol(name);
  		if (val != -1) {
  			*seqp = val;
  			debug("Found seq %d
  ", *seqp);
  			return 0;

  		}
  	}
  
  	debug("Not found
  ");
  	return -ENOENT;
  }

  const char *fdtdec_get_chosen_prop(const void *blob, const char *name)

  {

  	int chosen_node;

  
  	if (!blob)

  		return NULL;

  	chosen_node = fdt_path_offset(blob, "/chosen");

  	return fdt_getprop(blob, chosen_node, name, NULL);
  }
  
  int fdtdec_get_chosen_node(const void *blob, const char *name)
  {
  	const char *prop;
  
  	prop = fdtdec_get_chosen_prop(blob, name);

  	if (!prop)
  		return -FDT_ERR_NOTFOUND;
  	return fdt_path_offset(blob, prop);
  }

  int fdtdec_check_fdt(void)
  {
  	/*
  	 * We must have an FDT, but we cannot panic() yet since the console
  	 * is not ready. So for now, just assert(). Boards which need an early
  	 * FDT (prior to console ready) will need to make their own
  	 * arrangements and do their own checks.
  	 */
  	assert(!fdtdec_prepare_fdt());
  	return 0;
  }

  /*
   * This function is a little odd in that it accesses global data. At some
   * point if the architecture board.c files merge this will make more sense.
   * Even now, it is common code.
   */

  int fdtdec_prepare_fdt(void)

  {

  	if (!gd->fdt_blob || ((uintptr_t)gd->fdt_blob & 3) ||
  	    fdt_check_header(gd->fdt_blob)) {

  #ifdef CONFIG_SPL_BUILD
  		puts("Missing DTB
  ");
  #else
  		puts("No valid device tree binary found - please append one to U-Boot binary, use u-boot-dtb.bin or define CONFIG_OF_EMBED. For sandbox, use -d <file.dtb>
  ");

  # ifdef DEBUG
  		if (gd->fdt_blob) {
  			printf("fdt_blob=%p
  ", gd->fdt_blob);
  			print_buffer((ulong)gd->fdt_blob, gd->fdt_blob, 4,
  				     32, 0);
  		}
  # endif

  #endif

  		return -1;
  	}

  	return 0;
  }

  
  int fdtdec_lookup_phandle(const void *blob, int node, const char *prop_name)
  {
  	const u32 *phandle;
  	int lookup;

  	debug("%s: %s
  ", __func__, prop_name);

  	phandle = fdt_getprop(blob, node, prop_name, NULL);
  	if (!phandle)
  		return -FDT_ERR_NOTFOUND;
  
  	lookup = fdt_node_offset_by_phandle(blob, fdt32_to_cpu(*phandle));
  	return lookup;
  }
  
  /**
   * Look up a property in a node and check that it has a minimum length.
   *
   * @param blob		FDT blob
   * @param node		node to examine
   * @param prop_name	name of property to find
   * @param min_len	minimum property length in bytes
   * @param err		0 if ok, or -FDT_ERR_NOTFOUND if the property is not
  			found, or -FDT_ERR_BADLAYOUT if not enough data
   * @return pointer to cell, which is only valid if err == 0
   */
  static const void *get_prop_check_min_len(const void *blob, int node,

  					  const char *prop_name, int min_len,
  					  int *err)

  {
  	const void *cell;
  	int len;
  
  	debug("%s: %s
  ", __func__, prop_name);
  	cell = fdt_getprop(blob, node, prop_name, &len);
  	if (!cell)
  		*err = -FDT_ERR_NOTFOUND;
  	else if (len < min_len)
  		*err = -FDT_ERR_BADLAYOUT;
  	else
  		*err = 0;
  	return cell;
  }
  
  int fdtdec_get_int_array(const void *blob, int node, const char *prop_name,

  			 u32 *array, int count)

  {
  	const u32 *cell;

  	int err = 0;

  
  	debug("%s: %s
  ", __func__, prop_name);
  	cell = get_prop_check_min_len(blob, node, prop_name,
  				      sizeof(u32) * count, &err);
  	if (!err) {

  		int i;

  		for (i = 0; i < count; i++)
  			array[i] = fdt32_to_cpu(cell[i]);
  	}
  	return err;
  }

  int fdtdec_get_int_array_count(const void *blob, int node,
  			       const char *prop_name, u32 *array, int count)
  {
  	const u32 *cell;
  	int len, elems;
  	int i;
  
  	debug("%s: %s
  ", __func__, prop_name);
  	cell = fdt_getprop(blob, node, prop_name, &len);
  	if (!cell)
  		return -FDT_ERR_NOTFOUND;
  	elems = len / sizeof(u32);
  	if (count > elems)
  		count = elems;
  	for (i = 0; i < count; i++)
  		array[i] = fdt32_to_cpu(cell[i]);
  
  	return count;
  }

  const u32 *fdtdec_locate_array(const void *blob, int node,
  			       const char *prop_name, int count)
  {
  	const u32 *cell;
  	int err;
  
  	cell = get_prop_check_min_len(blob, node, prop_name,
  				      sizeof(u32) * count, &err);
  	return err ? NULL : cell;
  }

  int fdtdec_get_bool(const void *blob, int node, const char *prop_name)
  {
  	const s32 *cell;
  	int len;
  
  	debug("%s: %s
  ", __func__, prop_name);
  	cell = fdt_getprop(blob, node, prop_name, &len);
  	return cell != NULL;
  }

  int fdtdec_parse_phandle_with_args(const void *blob, int src_node,
  				   const char *list_name,
  				   const char *cells_name,
  				   int cell_count, int index,
  				   struct fdtdec_phandle_args *out_args)
  {
  	const __be32 *list, *list_end;
  	int rc = 0, size, cur_index = 0;
  	uint32_t count = 0;
  	int node = -1;
  	int phandle;
  
  	/* Retrieve the phandle list property */
  	list = fdt_getprop(blob, src_node, list_name, &size);
  	if (!list)
  		return -ENOENT;
  	list_end = list + size / sizeof(*list);
  
  	/* Loop over the phandles until all the requested entry is found */
  	while (list < list_end) {
  		rc = -EINVAL;
  		count = 0;
  
  		/*
  		 * If phandle is 0, then it is an empty entry with no
  		 * arguments.  Skip forward to the next entry.
  		 */
  		phandle = be32_to_cpup(list++);
  		if (phandle) {
  			/*
  			 * Find the provider node and parse the #*-cells
  			 * property to determine the argument length.
  			 *
  			 * This is not needed if the cell count is hard-coded
  			 * (i.e. cells_name not set, but cell_count is set),
  			 * except when we're going to return the found node
  			 * below.
  			 */
  			if (cells_name || cur_index == index) {
  				node = fdt_node_offset_by_phandle(blob,
  								  phandle);
  				if (!node) {
  					debug("%s: could not find phandle
  ",
  					      fdt_get_name(blob, src_node,
  							   NULL));
  					goto err;
  				}
  			}
  
  			if (cells_name) {
  				count = fdtdec_get_int(blob, node, cells_name,
  						       -1);
  				if (count == -1) {
  					debug("%s: could not get %s for %s
  ",
  					      fdt_get_name(blob, src_node,
  							   NULL),
  					      cells_name,
  					      fdt_get_name(blob, node,
  							   NULL));
  					goto err;
  				}
  			} else {
  				count = cell_count;
  			}
  
  			/*
  			 * Make sure that the arguments actually fit in the
  			 * remaining property data length
  			 */
  			if (list + count > list_end) {
  				debug("%s: arguments longer than property
  ",
  				      fdt_get_name(blob, src_node, NULL));
  				goto err;
  			}
  		}
  
  		/*
  		 * All of the error cases above bail out of the loop, so at
  		 * this point, the parsing is successful. If the requested
  		 * index matches, then fill the out_args structure and return,
  		 * or return -ENOENT for an empty entry.
  		 */
  		rc = -ENOENT;
  		if (cur_index == index) {
  			if (!phandle)
  				goto err;
  
  			if (out_args) {
  				int i;
  
  				if (count > MAX_PHANDLE_ARGS) {
  					debug("%s: too many arguments %d
  ",
  					      fdt_get_name(blob, src_node,
  							   NULL), count);
  					count = MAX_PHANDLE_ARGS;
  				}
  				out_args->node = node;
  				out_args->args_count = count;
  				for (i = 0; i < count; i++) {
  					out_args->args[i] =
  							be32_to_cpup(list++);
  				}
  			}
  
  			/* Found it! return success */
  			return 0;
  		}
  
  		node = -1;
  		list += count;
  		cur_index++;
  	}
  
  	/*
  	 * Result will be one of:
  	 * -ENOENT : index is for empty phandle
  	 * -EINVAL : parsing error on data
  	 * [1..n]  : Number of phandle (count mode; when index = -1)
  	 */
  	rc = index < 0 ? cur_index : -ENOENT;
   err:
  	return rc;
  }

  int fdtdec_get_child_count(const void *blob, int node)
  {
  	int subnode;
  	int num = 0;

  	fdt_for_each_subnode(subnode, blob, node)

  		num++;
  
  	return num;
  }

  int fdtdec_get_byte_array(const void *blob, int node, const char *prop_name,

  			  u8 *array, int count)

  {
  	const u8 *cell;
  	int err;
  
  	cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
  	if (!err)
  		memcpy(array, cell, count);
  	return err;
  }
  
  const u8 *fdtdec_locate_byte_array(const void *blob, int node,

  				   const char *prop_name, int count)

  {
  	const u8 *cell;
  	int err;
  
  	cell = get_prop_check_min_len(blob, node, prop_name, count, &err);
  	if (err)
  		return NULL;
  	return cell;
  }

  int fdtdec_get_config_int(const void *blob, const char *prop_name,

  			  int default_val)

  {
  	int config_node;
  
  	debug("%s: %s
  ", __func__, prop_name);
  	config_node = fdt_path_offset(blob, "/config");
  	if (config_node < 0)
  		return default_val;
  	return fdtdec_get_int(blob, config_node, prop_name, default_val);
  }

  int fdtdec_get_config_bool(const void *blob, const char *prop_name)
  {
  	int config_node;
  	const void *prop;
  
  	debug("%s: %s
  ", __func__, prop_name);
  	config_node = fdt_path_offset(blob, "/config");
  	if (config_node < 0)
  		return 0;
  	prop = fdt_get_property(blob, config_node, prop_name, NULL);
  
  	return prop != NULL;
  }

  char *fdtdec_get_config_string(const void *blob, const char *prop_name)
  {
  	const char *nodep;
  	int nodeoffset;
  	int len;
  
  	debug("%s: %s
  ", __func__, prop_name);
  	nodeoffset = fdt_path_offset(blob, "/config");
  	if (nodeoffset < 0)
  		return NULL;
  
  	nodep = fdt_getprop(blob, nodeoffset, prop_name, &len);
  	if (!nodep)
  		return NULL;
  
  	return (char *)nodep;
  }

  int fdtdec_decode_region(const void *blob, int node, const char *prop_name,
  			 fdt_addr_t *basep, fdt_size_t *sizep)

  {
  	const fdt_addr_t *cell;
  	int len;

  	debug("%s: %s: %s
  ", __func__, fdt_get_name(blob, node, NULL),
  	      prop_name);

  	cell = fdt_getprop(blob, node, prop_name, &len);

  	if (!cell || (len < sizeof(fdt_addr_t) * 2)) {
  		debug("cell=%p, len=%d
  ", cell, len);

  		return -1;

  	}
  
  	*basep = fdt_addr_to_cpu(*cell);
  	*sizep = fdt_size_to_cpu(cell[1]);
  	debug("%s: base=%08lx, size=%lx
  ", __func__, (ulong)*basep,
  	      (ulong)*sizep);

  	return 0;
  }

  u64 fdtdec_get_number(const fdt32_t *ptr, unsigned int cells)

  {
  	u64 number = 0;
  
  	while (cells--)
  		number = (number << 32) | fdt32_to_cpu(*ptr++);
  
  	return number;
  }
  
  int fdt_get_resource(const void *fdt, int node, const char *property,
  		     unsigned int index, struct fdt_resource *res)
  {
  	const fdt32_t *ptr, *end;
  	int na, ns, len, parent;
  	unsigned int i = 0;
  
  	parent = fdt_parent_offset(fdt, node);
  	if (parent < 0)
  		return parent;
  
  	na = fdt_address_cells(fdt, parent);
  	ns = fdt_size_cells(fdt, parent);
  
  	ptr = fdt_getprop(fdt, node, property, &len);
  	if (!ptr)
  		return len;
  
  	end = ptr + len / sizeof(*ptr);
  
  	while (ptr + na + ns <= end) {
  		if (i == index) {

  			res->start = fdtdec_get_number(ptr, na);
  			res->end = res->start;

  			res->end += fdtdec_get_number(&ptr[na], ns) - 1;
  			return 0;
  		}
  
  		ptr += na + ns;
  		i++;
  	}
  
  	return -FDT_ERR_NOTFOUND;
  }
  
  int fdt_get_named_resource(const void *fdt, int node, const char *property,
  			   const char *prop_names, const char *name,
  			   struct fdt_resource *res)
  {
  	int index;

  	index = fdt_stringlist_search(fdt, node, prop_names, name);

  	if (index < 0)
  		return index;
  
  	return fdt_get_resource(fdt, node, property, index, res);
  }

  int fdtdec_decode_memory_region(const void *blob, int config_node,
  				const char *mem_type, const char *suffix,
  				fdt_addr_t *basep, fdt_size_t *sizep)
  {
  	char prop_name[50];
  	const char *mem;
  	fdt_size_t size, offset_size;
  	fdt_addr_t base, offset;
  	int node;
  
  	if (config_node == -1) {
  		config_node = fdt_path_offset(blob, "/config");
  		if (config_node < 0) {
  			debug("%s: Cannot find /config node
  ", __func__);
  			return -ENOENT;
  		}
  	}
  	if (!suffix)
  		suffix = "";
  
  	snprintf(prop_name, sizeof(prop_name), "%s-memory%s", mem_type,
  		 suffix);
  	mem = fdt_getprop(blob, config_node, prop_name, NULL);
  	if (!mem) {
  		debug("%s: No memory type for '%s', using /memory
  ", __func__,
  		      prop_name);
  		mem = "/memory";
  	}
  
  	node = fdt_path_offset(blob, mem);
  	if (node < 0) {
  		debug("%s: Failed to find node '%s': %s
  ", __func__, mem,
  		      fdt_strerror(node));
  		return -ENOENT;
  	}
  
  	/*
  	 * Not strictly correct - the memory may have multiple banks. We just
  	 * use the first
  	 */
  	if (fdtdec_decode_region(blob, node, "reg", &base, &size)) {
  		debug("%s: Failed to decode memory region %s
  ", __func__,
  		      mem);
  		return -EINVAL;
  	}
  
  	snprintf(prop_name, sizeof(prop_name), "%s-offset%s", mem_type,
  		 suffix);
  	if (fdtdec_decode_region(blob, config_node, prop_name, &offset,
  				 &offset_size)) {
  		debug("%s: Failed to decode memory region '%s'
  ", __func__,
  		      prop_name);
  		return -EINVAL;
  	}
  
  	*basep = base + offset;
  	*sizep = offset_size;
  
  	return 0;
  }

  static int decode_timing_property(const void *blob, int node, const char *name,
  				  struct timing_entry *result)
  {
  	int length, ret = 0;
  	const u32 *prop;
  
  	prop = fdt_getprop(blob, node, name, &length);
  	if (!prop) {
  		debug("%s: could not find property %s
  ",
  		      fdt_get_name(blob, node, NULL), name);
  		return length;
  	}
  
  	if (length == sizeof(u32)) {
  		result->typ = fdtdec_get_int(blob, node, name, 0);
  		result->min = result->typ;
  		result->max = result->typ;
  	} else {
  		ret = fdtdec_get_int_array(blob, node, name, &result->min, 3);
  	}
  
  	return ret;
  }
  
  int fdtdec_decode_display_timing(const void *blob, int parent, int index,
  				 struct display_timing *dt)
  {
  	int i, node, timings_node;
  	u32 val = 0;
  	int ret = 0;
  
  	timings_node = fdt_subnode_offset(blob, parent, "display-timings");
  	if (timings_node < 0)
  		return timings_node;
  
  	for (i = 0, node = fdt_first_subnode(blob, timings_node);
  	     node > 0 && i != index;
  	     node = fdt_next_subnode(blob, node))
  		i++;
  
  	if (node < 0)
  		return node;
  
  	memset(dt, 0, sizeof(*dt));
  
  	ret |= decode_timing_property(blob, node, "hback-porch",
  				      &dt->hback_porch);
  	ret |= decode_timing_property(blob, node, "hfront-porch",
  				      &dt->hfront_porch);
  	ret |= decode_timing_property(blob, node, "hactive", &dt->hactive);
  	ret |= decode_timing_property(blob, node, "hsync-len", &dt->hsync_len);
  	ret |= decode_timing_property(blob, node, "vback-porch",
  				      &dt->vback_porch);
  	ret |= decode_timing_property(blob, node, "vfront-porch",
  				      &dt->vfront_porch);
  	ret |= decode_timing_property(blob, node, "vactive", &dt->vactive);
  	ret |= decode_timing_property(blob, node, "vsync-len", &dt->vsync_len);
  	ret |= decode_timing_property(blob, node, "clock-frequency",
  				      &dt->pixelclock);
  
  	dt->flags = 0;
  	val = fdtdec_get_int(blob, node, "vsync-active", -1);
  	if (val != -1) {
  		dt->flags |= val ? DISPLAY_FLAGS_VSYNC_HIGH :
  				DISPLAY_FLAGS_VSYNC_LOW;
  	}
  	val = fdtdec_get_int(blob, node, "hsync-active", -1);
  	if (val != -1) {
  		dt->flags |= val ? DISPLAY_FLAGS_HSYNC_HIGH :
  				DISPLAY_FLAGS_HSYNC_LOW;
  	}
  	val = fdtdec_get_int(blob, node, "de-active", -1);
  	if (val != -1) {
  		dt->flags |= val ? DISPLAY_FLAGS_DE_HIGH :
  				DISPLAY_FLAGS_DE_LOW;
  	}
  	val = fdtdec_get_int(blob, node, "pixelclk-active", -1);
  	if (val != -1) {
  		dt->flags |= val ? DISPLAY_FLAGS_PIXDATA_POSEDGE :
  				DISPLAY_FLAGS_PIXDATA_NEGEDGE;
  	}
  
  	if (fdtdec_get_bool(blob, node, "interlaced"))
  		dt->flags |= DISPLAY_FLAGS_INTERLACED;
  	if (fdtdec_get_bool(blob, node, "doublescan"))
  		dt->flags |= DISPLAY_FLAGS_DOUBLESCAN;
  	if (fdtdec_get_bool(blob, node, "doubleclk"))
  		dt->flags |= DISPLAY_FLAGS_DOUBLECLK;

  	return ret;

  }

  int fdtdec_setup_memory_size(void)
  {
  	int ret, mem;
  	struct fdt_resource res;
  
  	mem = fdt_path_offset(gd->fdt_blob, "/memory");
  	if (mem < 0) {
  		debug("%s: Missing /memory node
  ", __func__);
  		return -EINVAL;
  	}
  
  	ret = fdt_get_resource(gd->fdt_blob, mem, "reg", 0, &res);
  	if (ret != 0) {
  		debug("%s: Unable to decode first memory bank
  ", __func__);
  		return -EINVAL;
  	}
  
  	gd->ram_size = (phys_size_t)(res.end - res.start + 1);

  	debug("%s: Initial DRAM size %llx
  ", __func__,
  	      (unsigned long long)gd->ram_size);

  
  	return 0;
  }
  
  #if defined(CONFIG_NR_DRAM_BANKS)
  int fdtdec_setup_memory_banksize(void)
  {

  	int bank, ret, mem, reg = 0;

  	struct fdt_resource res;

  	mem = fdt_node_offset_by_prop_value(gd->fdt_blob, -1, "device_type",
  					    "memory", 7);

  	if (mem < 0) {
  		debug("%s: Missing /memory node
  ", __func__);
  		return -EINVAL;
  	}
  
  	for (bank = 0; bank < CONFIG_NR_DRAM_BANKS; bank++) {

  		ret = fdt_get_resource(gd->fdt_blob, mem, "reg", reg++, &res);
  		if (ret == -FDT_ERR_NOTFOUND) {
  			reg = 0;
  			mem = fdt_node_offset_by_prop_value(gd->fdt_blob, mem,
  							    "device_type",
  							    "memory", 7);
  			if (mem == -FDT_ERR_NOTFOUND)
  				break;
  
  			ret = fdt_get_resource(gd->fdt_blob, mem, "reg", reg++, &res);
  			if (ret == -FDT_ERR_NOTFOUND)
  				break;
  		}
  		if (ret != 0) {

  			return -EINVAL;

  		}

  
  		gd->bd->bi_dram[bank].start = (phys_addr_t)res.start;
  		gd->bd->bi_dram[bank].size =
  			(phys_size_t)(res.end - res.start + 1);
  
  		debug("%s: DRAM Bank #%d: start = 0x%llx, size = 0x%llx
  ",
  		      __func__, bank,
  		      (unsigned long long)gd->bd->bi_dram[bank].start,
  		      (unsigned long long)gd->bd->bi_dram[bank].size);
  	}
  
  	return 0;
  }
  #endif

  #if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
  # if CONFIG_IS_ENABLED(MULTI_DTB_FIT_GZIP) ||\
  	CONFIG_IS_ENABLED(MULTI_DTB_FIT_LZO)
  static int uncompress_blob(const void *src, ulong sz_src, void **dstp)
  {
  	size_t sz_out = CONFIG_SPL_MULTI_DTB_FIT_UNCOMPRESS_SZ;
  	ulong sz_in = sz_src;
  	void *dst;
  	int rc;
  
  	if (CONFIG_IS_ENABLED(GZIP))
  		if (gzip_parse_header(src, sz_in) < 0)
  			return -1;
  	if (CONFIG_IS_ENABLED(LZO))
  		if (!lzop_is_valid_header(src))
  			return -EBADMSG;
  
  	if (CONFIG_IS_ENABLED(MULTI_DTB_FIT_DYN_ALLOC)) {
  		dst = malloc(sz_out);
  		if (!dst) {
  			puts("uncompress_blob: Unable to allocate memory
  ");
  			return -ENOMEM;
  		}
  	} else  {
  #  if CONFIG_IS_ENABLED(MULTI_DTB_FIT_USER_DEFINED_AREA)
  		dst = (void *)CONFIG_VAL(MULTI_DTB_FIT_USER_DEF_ADDR);
  #  else
  		return -ENOTSUPP;
  #  endif
  	}
  
  	if (CONFIG_IS_ENABLED(GZIP))
  		rc = gunzip(dst, sz_out, (u8 *)src, &sz_in);
  	else if (CONFIG_IS_ENABLED(LZO))
  		rc = lzop_decompress(src, sz_in, dst, &sz_out);
  
  	if (rc < 0) {
  		/* not a valid compressed blob */
  		puts("uncompress_blob: Unable to uncompress
  ");
  		if (CONFIG_IS_ENABLED(MULTI_DTB_FIT_DYN_ALLOC))
  			free(dst);
  		return -EBADMSG;
  	}
  	*dstp = dst;
  	return 0;
  }
  # else
  static int uncompress_blob(const void *src, ulong sz_src, void **dstp)
  {
  	return -ENOTSUPP;
  }
  # endif
  #endif

  #if defined(CONFIG_OF_BOARD) || defined(CONFIG_OF_SEPARATE)
  /*
   * For CONFIG_OF_SEPARATE, the board may optionally implement this to
   * provide and/or fixup the fdt.
   */
  __weak void *board_fdt_blob_setup(void)
  {
  	void *fdt_blob = NULL;
  #ifdef CONFIG_SPL_BUILD
  	/* FDT is at end of BSS unless it is in a different memory region */
  	if (IS_ENABLED(CONFIG_SPL_SEPARATE_BSS))
  		fdt_blob = (ulong *)&_image_binary_end;
  	else
  		fdt_blob = (ulong *)&__bss_end;
  #else
  	/* FDT is at end of image */
  	fdt_blob = (ulong *)&_end;
  #endif
  	return fdt_blob;
  }
  #endif

  int fdtdec_setup(void)

  {

  #if CONFIG_IS_ENABLED(OF_CONTROL)

  # if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
  	void *fdt_blob;
  # endif

  # ifdef CONFIG_OF_EMBED
  	/* Get a pointer to the FDT */

  #  ifdef CONFIG_SPL_BUILD
  	gd->fdt_blob = __dtb_dt_spl_begin;
  #  else

  	gd->fdt_blob = __dtb_dt_begin;

  #  endif

  # elif defined(CONFIG_OF_BOARD) || defined(CONFIG_OF_SEPARATE)

  	/* Allow the board to override the fdt address. */
  	gd->fdt_blob = board_fdt_blob_setup();

  # elif defined(CONFIG_OF_HOSTFILE)
  	if (sandbox_read_fdt_from_file()) {
  		puts("Failed to read control FDT
  ");
  		return -1;
  	}
  # endif
  # ifndef CONFIG_SPL_BUILD
  	/* Allow the early environment to override the fdt address */

  	gd->fdt_blob = (void *)env_get_ulong("fdtcontroladdr", 16,

  						(uintptr_t)gd->fdt_blob);
  # endif

  
  # if CONFIG_IS_ENABLED(MULTI_DTB_FIT)
  	/*
  	 * Try and uncompress the blob.
  	 * Unfortunately there is no way to know how big the input blob really
  	 * is. So let us set the maximum input size arbitrarily high. 16MB
  	 * ought to be more than enough for packed DTBs.
  	 */
  	if (uncompress_blob(gd->fdt_blob, 0x1000000, &fdt_blob) == 0)
  		gd->fdt_blob = fdt_blob;
  
  	/*
  	 * Check if blob is a FIT images containings DTBs.
  	 * If so, pick the most relevant
  	 */
  	fdt_blob = locate_dtb_in_fit(gd->fdt_blob);
  	if (fdt_blob)
  		gd->fdt_blob = fdt_blob;
  # endif

  #endif

  	return fdtdec_prepare_fdt();

  }
  
  #endif /* !USE_HOSTCC */