fdtdec.c

				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\n", __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\n", __func__,
		      prop_name);
		mem = "/memory";
	}

	node = fdt_path_offset(blob, mem);
	if (node < 0) {
		debug("%s: Failed to find node '%s': %s\n", __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\n", __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'\n", __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\n",
		      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\n", __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\n", __func__);
		return -EINVAL;
	}

	gd->ram_size = (phys_size_t)(res.end - res.start + 1);
	debug("%s: Initial DRAM size %llx\n", __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\n", __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\n",
		      __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\n");
			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\n");
		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\n");
		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 */