3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
5 * Copyright 2010-2011 Freescale Semiconductor, Inc.
7 * SPDX-License-Identifier: GPL-2.0+
12 #include <stdio_dev.h>
13 #include <linux/ctype.h>
14 #include <linux/types.h>
15 #include <asm/global_data.h>
17 #include <fdt_support.h>
22 * fdt_getprop_u32_default_node - Return a node's property or a default
24 * @fdt: ptr to device tree
25 * @off: offset of node
26 * @cell: cell offset in property
27 * @prop: property name
28 * @dflt: default value if the property isn't found
30 * Convenience function to return a node's property or a default value if
31 * the property doesn't exist.
33 u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
34 const char *prop, const u32 dflt)
39 val = fdt_getprop(fdt, off, prop, &len);
41 /* Check if property exists */
45 /* Check if property is long enough */
46 if (len < ((cell + 1) * sizeof(uint32_t)))
49 return fdt32_to_cpu(*val);
53 * fdt_getprop_u32_default - Find a node and return it's property or a default
55 * @fdt: ptr to device tree
57 * @prop: property name
58 * @dflt: default value if the property isn't found
60 * Convenience function to find a node and return it's property or a
61 * default value if it doesn't exist.
63 u32 fdt_getprop_u32_default(const void *fdt, const char *path,
64 const char *prop, const u32 dflt)
68 off = fdt_path_offset(fdt, path);
72 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt);
76 * fdt_find_and_setprop: Find a node and set it's property
78 * @fdt: ptr to device tree
80 * @prop: property name
81 * @val: ptr to new value
82 * @len: length of new property value
83 * @create: flag to create the property if it doesn't exist
85 * Convenience function to directly set a property given the path to the node.
87 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
88 const void *val, int len, int create)
90 int nodeoff = fdt_path_offset(fdt, node);
95 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
96 return 0; /* create flag not set; so exit quietly */
98 return fdt_setprop(fdt, nodeoff, prop, val, len);
102 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
104 * @fdt: pointer to the device tree blob
105 * @parentoffset: structure block offset of a node
106 * @name: name of the subnode to locate
108 * fdt_subnode_offset() finds a subnode of the node with a given name.
109 * If the subnode does not exist, it will be created.
111 int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name)
115 offset = fdt_subnode_offset(fdt, parentoffset, name);
117 if (offset == -FDT_ERR_NOTFOUND)
118 offset = fdt_add_subnode(fdt, parentoffset, name);
121 printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset));
126 /* rename to CONFIG_OF_STDOUT_PATH ? */
127 #if defined(OF_STDOUT_PATH)
128 static int fdt_fixup_stdout(void *fdt, int chosenoff)
130 return fdt_setprop(fdt, chosenoff, "linux,stdout-path",
131 OF_STDOUT_PATH, strlen(OF_STDOUT_PATH) + 1);
133 #elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
134 static void fdt_fill_multisername(char *sername, size_t maxlen)
136 const char *outname = stdio_devices[stdout]->name;
138 if (strcmp(outname, "serial") > 0)
139 strncpy(sername, outname, maxlen);
142 if (strcmp(outname + 1, "serial") > 0)
143 strncpy(sername, outname + 1, maxlen);
146 static int fdt_fixup_stdout(void *fdt, int chosenoff)
150 char sername[9] = { 0 };
153 char tmp[256]; /* long enough */
155 fdt_fill_multisername(sername, sizeof(sername) - 1);
157 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
159 aliasoff = fdt_path_offset(fdt, "/aliases");
165 path = fdt_getprop(fdt, aliasoff, sername, &len);
171 /* fdt_setprop may break "path" so we copy it to tmp buffer */
172 memcpy(tmp, path, len);
174 err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len);
176 printf("WARNING: could not set linux,stdout-path %s.\n",
182 printf("WARNING: %s: could not read %s alias: %s\n",
183 __func__, sername, fdt_strerror(err));
188 static int fdt_fixup_stdout(void *fdt, int chosenoff)
194 static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name,
195 uint64_t val, int is_u64)
198 return fdt_setprop_u64(fdt, nodeoffset, name, val);
200 return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val);
203 int fdt_root(void *fdt)
208 err = fdt_check_header(fdt);
210 printf("fdt_root: %s\n", fdt_strerror(err));
214 serial = getenv("serial#");
216 err = fdt_setprop(fdt, 0, "serial-number", serial,
220 printf("WARNING: could not set serial-number %s.\n",
229 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end)
236 /* just return if the size of initrd is zero */
237 if (initrd_start == initrd_end)
240 /* find or create "/chosen" node. */
241 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
245 total = fdt_num_mem_rsv(fdt);
248 * Look for an existing entry and update it. If we don't find
249 * the entry, we will j be the next available slot.
251 for (j = 0; j < total; j++) {
252 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
253 if (addr == initrd_start) {
254 fdt_del_mem_rsv(fdt, j);
259 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
261 printf("fdt_initrd: %s\n", fdt_strerror(err));
265 is_u64 = (fdt_address_cells(fdt, 0) == 2);
267 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start",
268 (uint64_t)initrd_start, is_u64);
271 printf("WARNING: could not set linux,initrd-start %s.\n",
276 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end",
277 (uint64_t)initrd_end, is_u64);
280 printf("WARNING: could not set linux,initrd-end %s.\n",
289 int fdt_chosen(void *fdt)
293 char *str; /* used to set string properties */
295 err = fdt_check_header(fdt);
297 printf("fdt_chosen: %s\n", fdt_strerror(err));
301 /* find or create "/chosen" node. */
302 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
306 str = getenv("bootargs");
308 err = fdt_setprop(fdt, nodeoffset, "bootargs", str,
311 printf("WARNING: could not set bootargs %s.\n",
317 return fdt_fixup_stdout(fdt, nodeoffset);
320 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
321 const void *val, int len, int create)
325 debug("Updating property '%s/%s' = ", path, prop);
326 for (i = 0; i < len; i++)
327 debug(" %.2x", *(u8*)(val+i));
330 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
332 printf("Unable to update property %s:%s, err=%s\n",
333 path, prop, fdt_strerror(rc));
336 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
339 fdt32_t tmp = cpu_to_fdt32(val);
340 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
343 void do_fixup_by_prop(void *fdt,
344 const char *pname, const void *pval, int plen,
345 const char *prop, const void *val, int len,
351 debug("Updating property '%s' = ", prop);
352 for (i = 0; i < len; i++)
353 debug(" %.2x", *(u8*)(val+i));
356 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
357 while (off != -FDT_ERR_NOTFOUND) {
358 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
359 fdt_setprop(fdt, off, prop, val, len);
360 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
364 void do_fixup_by_prop_u32(void *fdt,
365 const char *pname, const void *pval, int plen,
366 const char *prop, u32 val, int create)
368 fdt32_t tmp = cpu_to_fdt32(val);
369 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
372 void do_fixup_by_compat(void *fdt, const char *compat,
373 const char *prop, const void *val, int len, int create)
378 debug("Updating property '%s' = ", prop);
379 for (i = 0; i < len; i++)
380 debug(" %.2x", *(u8*)(val+i));
383 off = fdt_node_offset_by_compatible(fdt, -1, compat);
384 while (off != -FDT_ERR_NOTFOUND) {
385 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
386 fdt_setprop(fdt, off, prop, val, len);
387 off = fdt_node_offset_by_compatible(fdt, off, compat);
391 void do_fixup_by_compat_u32(void *fdt, const char *compat,
392 const char *prop, u32 val, int create)
394 fdt32_t tmp = cpu_to_fdt32(val);
395 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
399 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
401 static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size,
405 int address_cells = fdt_address_cells(fdt, 0);
406 int size_cells = fdt_size_cells(fdt, 0);
409 for (i = 0; i < n; i++) {
410 if (address_cells == 2)
411 *(fdt64_t *)p = cpu_to_fdt64(address[i]);
413 *(fdt32_t *)p = cpu_to_fdt32(address[i]);
414 p += 4 * address_cells;
417 *(fdt64_t *)p = cpu_to_fdt64(size[i]);
419 *(fdt32_t *)p = cpu_to_fdt32(size[i]);
423 return p - (char *)buf;
426 #ifdef CONFIG_NR_DRAM_BANKS
427 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
429 #define MEMORY_BANKS_MAX 4
431 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
435 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
437 if (banks > MEMORY_BANKS_MAX) {
438 printf("%s: num banks %d exceeds hardcoded limit %d."
439 " Recompile with higher MEMORY_BANKS_MAX?\n",
440 __FUNCTION__, banks, MEMORY_BANKS_MAX);
444 err = fdt_check_header(blob);
446 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
450 /* find or create "/memory" node. */
451 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
455 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
458 printf("WARNING: could not set %s %s.\n", "device_type",
466 len = fdt_pack_reg(blob, tmp, start, size, banks);
468 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
470 printf("WARNING: could not set %s %s.\n",
471 "reg", fdt_strerror(err));
477 int fdt_fixup_memory(void *blob, u64 start, u64 size)
479 return fdt_fixup_memory_banks(blob, &start, &size, 1);
482 void fdt_fixup_ethernet(void *fdt)
485 char enet[16], *tmp, *end;
488 unsigned char mac_addr[6];
490 node = fdt_path_offset(fdt, "/aliases");
495 strcpy(mac, "ethaddr");
496 while ((tmp = getenv(mac)) != NULL) {
497 sprintf(enet, "ethernet%d", i);
498 path = fdt_getprop(fdt, node, enet, NULL);
500 debug("No alias for %s\n", enet);
501 sprintf(mac, "eth%daddr", ++i);
505 for (j = 0; j < 6; j++) {
506 mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
508 tmp = (*end) ? end+1 : end;
511 do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0);
512 do_fixup_by_path(fdt, path, "local-mac-address",
515 sprintf(mac, "eth%daddr", ++i);
519 /* Resize the fdt to its actual size + a bit of padding */
520 int fdt_shrink_to_minimum(void *blob)
530 total = fdt_num_mem_rsv(blob);
531 for (i = 0; i < total; i++) {
532 fdt_get_mem_rsv(blob, i, &addr, &size);
533 if (addr == (uintptr_t)blob) {
534 fdt_del_mem_rsv(blob, i);
540 * Calculate the actual size of the fdt
541 * plus the size needed for 5 fdt_add_mem_rsv, one
542 * for the fdt itself and 4 for a possible initrd
543 * ((initrd-start + initrd-end) * 2 (name & value))
545 actualsize = fdt_off_dt_strings(blob) +
546 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
548 /* Make it so the fdt ends on a page boundary */
549 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
550 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
552 /* Change the fdt header to reflect the correct size */
553 fdt_set_totalsize(blob, actualsize);
555 /* Add the new reservation */
556 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize);
564 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
566 #define FDT_PCI_PREFETCH (0x40000000)
567 #define FDT_PCI_MEM32 (0x02000000)
568 #define FDT_PCI_IO (0x01000000)
569 #define FDT_PCI_MEM64 (0x03000000)
571 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
573 int addrcell, sizecell, len, r;
575 /* sized based on pci addr cells, size-cells, & address-cells */
576 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
578 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
579 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
581 dma_range = &dma_ranges[0];
582 for (r = 0; r < hose->region_count; r++) {
583 u64 bus_start, phys_start, size;
585 /* skip if !PCI_REGION_SYS_MEMORY */
586 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
589 bus_start = (u64)hose->regions[r].bus_start;
590 phys_start = (u64)hose->regions[r].phys_start;
591 size = (u64)hose->regions[r].size;
594 if (size >= 0x100000000ull)
595 dma_range[0] |= FDT_PCI_MEM64;
597 dma_range[0] |= FDT_PCI_MEM32;
598 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
599 dma_range[0] |= FDT_PCI_PREFETCH;
600 #ifdef CONFIG_SYS_PCI_64BIT
601 dma_range[1] = bus_start >> 32;
605 dma_range[2] = bus_start & 0xffffffff;
608 dma_range[3] = phys_start >> 32;
609 dma_range[4] = phys_start & 0xffffffff;
611 dma_range[3] = phys_start & 0xffffffff;
615 dma_range[3 + addrcell + 0] = size >> 32;
616 dma_range[3 + addrcell + 1] = size & 0xffffffff;
618 dma_range[3 + addrcell + 0] = size & 0xffffffff;
621 dma_range += (3 + addrcell + sizecell);
624 len = dma_range - &dma_ranges[0];
626 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
632 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
634 * Provide a weak default function to return the flash bank size.
635 * There might be multiple non-identical flash chips connected to one
636 * chip-select, so we need to pass an index as well.
638 u32 __flash_get_bank_size(int cs, int idx)
640 extern flash_info_t flash_info[];
643 * As default, a simple 1:1 mapping is provided. Boards with
644 * a different mapping need to supply a board specific mapping
647 return flash_info[cs].size;
649 u32 flash_get_bank_size(int cs, int idx)
650 __attribute__((weak, alias("__flash_get_bank_size")));
653 * This function can be used to update the size in the "reg" property
654 * of all NOR FLASH device nodes. This is necessary for boards with
655 * non-fixed NOR FLASH sizes.
657 int fdt_fixup_nor_flash_size(void *blob)
659 char compat[][16] = { "cfi-flash", "jedec-flash" };
662 struct fdt_property *prop;
666 for (i = 0; i < 2; i++) {
667 off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
668 while (off != -FDT_ERR_NOTFOUND) {
672 * Found one compatible node, so fixup the size
673 * int its reg properties
675 prop = fdt_get_property_w(blob, off, "reg", &len);
677 int tuple_size = 3 * sizeof(reg);
680 * There might be multiple reg-tuples,
681 * so loop through them all
683 reg = reg2 = (u32 *)&prop->data[0];
684 for (idx = 0; idx < (len / tuple_size); idx++) {
686 * Update size in reg property
688 reg[2] = flash_get_bank_size(reg[0],
692 * Point to next reg tuple
697 fdt_setprop(blob, off, "reg", reg2, len);
700 /* Move to next compatible node */
701 off = fdt_node_offset_by_compatible(blob, off,
710 int fdt_increase_size(void *fdt, int add_len)
714 newlen = fdt_totalsize(fdt) + add_len;
716 /* Open in place with a new len */
717 return fdt_open_into(fdt, fdt, newlen);
720 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
721 #include <jffs2/load_kernel.h>
722 #include <mtd_node.h>
729 int fdt_del_subnodes(const void *blob, int parent_offset)
734 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
735 (off >= 0) && (ndepth > 0);
736 off = fdt_next_node(blob, off, &ndepth)) {
738 debug("delete %s: offset: %x\n",
739 fdt_get_name(blob, off, 0), off);
740 ret = fdt_del_node((void *)blob, off);
742 printf("Can't delete node: %s\n",
754 int fdt_del_partitions(void *blob, int parent_offset)
761 off = fdt_next_node(blob, parent_offset, &ndepth);
762 if (off > 0 && ndepth == 1) {
763 prop = fdt_getprop(blob, off, "label", NULL);
766 * Could not find label property, nand {}; node?
767 * Check subnode, delete partitions there if any.
769 return fdt_del_partitions(blob, off);
771 ret = fdt_del_subnodes(blob, parent_offset);
773 printf("Can't remove subnodes: %s\n",
782 int fdt_node_set_part_info(void *blob, int parent_offset,
783 struct mtd_device *dev)
785 struct list_head *pentry;
786 struct part_info *part;
787 struct reg_cell cell;
792 ret = fdt_del_partitions(blob, parent_offset);
797 * Check if it is nand {}; subnode, adjust
798 * the offset in this case
800 off = fdt_next_node(blob, parent_offset, &ndepth);
801 if (off > 0 && ndepth == 1)
805 list_for_each_prev(pentry, &dev->parts) {
808 part = list_entry(pentry, struct part_info, link);
810 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
811 part_num, part->name, part->size,
812 part->offset, part->mask_flags);
814 sprintf(buf, "partition@%llx", part->offset);
816 ret = fdt_add_subnode(blob, parent_offset, buf);
817 if (ret == -FDT_ERR_NOSPACE) {
818 ret = fdt_increase_size(blob, 512);
823 } else if (ret < 0) {
824 printf("Can't add partition node: %s\n",
830 /* Check MTD_WRITEABLE_CMD flag */
831 if (part->mask_flags & 1) {
833 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
834 if (ret == -FDT_ERR_NOSPACE) {
835 ret = fdt_increase_size(blob, 512);
844 cell.r0 = cpu_to_fdt32(part->offset);
845 cell.r1 = cpu_to_fdt32(part->size);
847 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
848 if (ret == -FDT_ERR_NOSPACE) {
849 ret = fdt_increase_size(blob, 512);
858 ret = fdt_setprop_string(blob, newoff, "label", part->name);
859 if (ret == -FDT_ERR_NOSPACE) {
860 ret = fdt_increase_size(blob, 512);
872 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
875 printf("Can't add property: %s\n", fdt_strerror(ret));
880 * Update partitions in nor/nand nodes using info from
881 * mtdparts environment variable. The nodes to update are
882 * specified by node_info structure which contains mtd device
883 * type and compatible string: E. g. the board code in
884 * ft_board_setup() could use:
886 * struct node_info nodes[] = {
887 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
888 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
891 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
893 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
895 struct node_info *ni = node_info;
896 struct mtd_device *dev;
901 parts = getenv("mtdparts");
905 if (mtdparts_init() != 0)
908 for (i = 0; i < node_info_size; i++) {
910 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
911 while (noff != -FDT_ERR_NOTFOUND) {
912 debug("%s: %s, mtd dev type %d\n",
913 fdt_get_name(blob, noff, 0),
914 ni[i].compat, ni[i].type);
915 dev = device_find(ni[i].type, idx++);
917 if (fdt_node_set_part_info(blob, noff, dev))
918 return; /* return on error */
921 /* Jump to next flash node */
922 noff = fdt_node_offset_by_compatible(blob, noff,
929 void fdt_del_node_and_alias(void *blob, const char *alias)
931 int off = fdt_path_offset(blob, alias);
936 fdt_del_node(blob, off);
938 off = fdt_path_offset(blob, "/aliases");
939 fdt_delprop(blob, off, alias);
942 /* Max address size we deal with */
943 #define OF_MAX_ADDR_CELLS 4
944 #define OF_BAD_ADDR FDT_ADDR_T_NONE
945 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
950 static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
954 printf(" %08x", *(addr++));
958 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
961 /* Callbacks for bus specific translators */
964 const char *addresses;
965 void (*count_cells)(void *blob, int parentoffset,
966 int *addrc, int *sizec);
967 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
968 int na, int ns, int pna);
969 int (*translate)(fdt32_t *addr, u64 offset, int na);
972 /* Default translator (generic bus) */
973 void of_bus_default_count_cells(void *blob, int parentoffset,
974 int *addrc, int *sizec)
979 *addrc = fdt_address_cells(blob, parentoffset);
982 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
984 *sizec = be32_to_cpup(prop);
990 static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
991 int na, int ns, int pna)
995 cp = of_read_number(range, na);
996 s = of_read_number(range + na + pna, ns);
997 da = of_read_number(addr, na);
999 debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64
1000 ", da=%" PRIu64 "\n", cp, s, da);
1002 if (da < cp || da >= (cp + s))
1007 static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
1009 u64 a = of_read_number(addr, na);
1010 memset(addr, 0, na * 4);
1013 addr[na - 2] = cpu_to_fdt32(a >> 32);
1014 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
1019 /* Array of bus specific translators */
1020 static struct of_bus of_busses[] = {
1025 .count_cells = of_bus_default_count_cells,
1026 .map = of_bus_default_map,
1027 .translate = of_bus_default_translate,
1031 static int of_translate_one(void * blob, int parent, struct of_bus *bus,
1032 struct of_bus *pbus, fdt32_t *addr,
1033 int na, int ns, int pna, const char *rprop)
1035 const fdt32_t *ranges;
1038 u64 offset = OF_BAD_ADDR;
1040 /* Normally, an absence of a "ranges" property means we are
1041 * crossing a non-translatable boundary, and thus the addresses
1042 * below the current not cannot be converted to CPU physical ones.
1043 * Unfortunately, while this is very clear in the spec, it's not
1044 * what Apple understood, and they do have things like /uni-n or
1045 * /ht nodes with no "ranges" property and a lot of perfectly
1046 * useable mapped devices below them. Thus we treat the absence of
1047 * "ranges" as equivalent to an empty "ranges" property which means
1048 * a 1:1 translation at that level. It's up to the caller not to try
1049 * to translate addresses that aren't supposed to be translated in
1050 * the first place. --BenH.
1052 ranges = fdt_getprop(blob, parent, rprop, &rlen);
1053 if (ranges == NULL || rlen == 0) {
1054 offset = of_read_number(addr, na);
1055 memset(addr, 0, pna * 4);
1056 debug("OF: no ranges, 1:1 translation\n");
1060 debug("OF: walking ranges...\n");
1062 /* Now walk through the ranges */
1064 rone = na + pna + ns;
1065 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1066 offset = bus->map(addr, ranges, na, ns, pna);
1067 if (offset != OF_BAD_ADDR)
1070 if (offset == OF_BAD_ADDR) {
1071 debug("OF: not found !\n");
1074 memcpy(addr, ranges + na, 4 * pna);
1077 of_dump_addr("OF: parent translation for:", addr, pna);
1078 debug("OF: with offset: %" PRIu64 "\n", offset);
1080 /* Translate it into parent bus space */
1081 return pbus->translate(addr, offset, pna);
1085 * Translate an address from the device-tree into a CPU physical address,
1086 * this walks up the tree and applies the various bus mappings on the
1089 * Note: We consider that crossing any level with #size-cells == 0 to mean
1090 * that translation is impossible (that is we are not dealing with a value
1091 * that can be mapped to a cpu physical address). This is not really specified
1092 * that way, but this is traditionally the way IBM at least do things
1094 static u64 __of_translate_address(void *blob, int node_offset, const fdt32_t *in_addr,
1098 struct of_bus *bus, *pbus;
1099 fdt32_t addr[OF_MAX_ADDR_CELLS];
1100 int na, ns, pna, pns;
1101 u64 result = OF_BAD_ADDR;
1103 debug("OF: ** translation for device %s **\n",
1104 fdt_get_name(blob, node_offset, NULL));
1106 /* Get parent & match bus type */
1107 parent = fdt_parent_offset(blob, node_offset);
1110 bus = &of_busses[0];
1112 /* Cound address cells & copy address locally */
1113 bus->count_cells(blob, parent, &na, &ns);
1114 if (!OF_CHECK_COUNTS(na, ns)) {
1115 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1116 fdt_get_name(blob, node_offset, NULL));
1119 memcpy(addr, in_addr, na * 4);
1121 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1122 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1123 of_dump_addr("OF: translating address:", addr, na);
1127 /* Switch to parent bus */
1128 node_offset = parent;
1129 parent = fdt_parent_offset(blob, node_offset);
1131 /* If root, we have finished */
1133 debug("OF: reached root node\n");
1134 result = of_read_number(addr, na);
1138 /* Get new parent bus and counts */
1139 pbus = &of_busses[0];
1140 pbus->count_cells(blob, parent, &pna, &pns);
1141 if (!OF_CHECK_COUNTS(pna, pns)) {
1142 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1143 fdt_get_name(blob, node_offset, NULL));
1147 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1148 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1150 /* Apply bus translation */
1151 if (of_translate_one(blob, node_offset, bus, pbus,
1152 addr, na, ns, pna, rprop))
1155 /* Complete the move up one level */
1160 of_dump_addr("OF: one level translation:", addr, na);
1167 u64 fdt_translate_address(void *blob, int node_offset, const fdt32_t *in_addr)
1169 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1173 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1174 * who's reg property matches a physical cpu address
1176 * @blob: ptr to device tree
1177 * @compat: compatiable string to match
1178 * @compat_off: property name
1181 int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1182 phys_addr_t compat_off)
1184 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1185 while (off != -FDT_ERR_NOTFOUND) {
1186 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
1188 if (compat_off == fdt_translate_address(blob, off, reg))
1191 off = fdt_node_offset_by_compatible(blob, off, compat);
1194 return -FDT_ERR_NOTFOUND;
1198 * fdt_alloc_phandle: Return next free phandle value
1200 * @blob: ptr to device tree
1202 int fdt_alloc_phandle(void *blob)
1205 uint32_t phandle = 0;
1207 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1208 offset = fdt_next_node(blob, offset, NULL)) {
1209 phandle = max(phandle, fdt_get_phandle(blob, offset));
1216 * fdt_set_phandle: Create a phandle property for the given node
1218 * @fdt: ptr to device tree
1219 * @nodeoffset: node to update
1220 * @phandle: phandle value to set (must be unique)
1222 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
1227 int off = fdt_node_offset_by_phandle(fdt, phandle);
1229 if ((off >= 0) && (off != nodeoffset)) {
1232 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1233 printf("Trying to update node %s with phandle %u ",
1236 fdt_get_path(fdt, off, buf, sizeof(buf));
1237 printf("that already exists in node %s.\n", buf);
1238 return -FDT_ERR_BADPHANDLE;
1242 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1247 * For now, also set the deprecated "linux,phandle" property, so that we
1248 * don't break older kernels.
1250 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1256 * fdt_create_phandle: Create a phandle property for the given node
1258 * @fdt: ptr to device tree
1259 * @nodeoffset: node to update
1261 unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
1263 /* see if there is a phandle already */
1264 int phandle = fdt_get_phandle(fdt, nodeoffset);
1266 /* if we got 0, means no phandle so create one */
1270 phandle = fdt_alloc_phandle(fdt);
1271 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1273 printf("Can't set phandle %u: %s\n", phandle,
1283 * fdt_set_node_status: Set status for the given node
1285 * @fdt: ptr to device tree
1286 * @nodeoffset: node to update
1287 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1288 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1289 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1291 int fdt_set_node_status(void *fdt, int nodeoffset,
1292 enum fdt_status status, unsigned int error_code)
1301 case FDT_STATUS_OKAY:
1302 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1304 case FDT_STATUS_DISABLED:
1305 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1307 case FDT_STATUS_FAIL:
1308 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1310 case FDT_STATUS_FAIL_ERROR_CODE:
1311 sprintf(buf, "fail-%d", error_code);
1312 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1315 printf("Invalid fdt status: %x\n", status);
1324 * fdt_set_status_by_alias: Set status for the given node given an alias
1326 * @fdt: ptr to device tree
1327 * @alias: alias of node to update
1328 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1329 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1330 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1332 int fdt_set_status_by_alias(void *fdt, const char* alias,
1333 enum fdt_status status, unsigned int error_code)
1335 int offset = fdt_path_offset(fdt, alias);
1337 return fdt_set_node_status(fdt, offset, status, error_code);
1340 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
1341 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1346 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1347 if (noff != -FDT_ERR_NOTFOUND) {
1348 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1350 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1351 if (ret == -FDT_ERR_NOSPACE) {
1352 ret = fdt_increase_size(blob, 512);
1357 } else if (ret < 0) {
1358 printf("Can't add property: %s\n", fdt_strerror(ret));
1364 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1370 * Verify the physical address of device tree node for a given alias
1372 * This function locates the device tree node of a given alias, and then
1373 * verifies that the physical address of that device matches the given
1374 * parameter. It displays a message if there is a mismatch.
1376 * Returns 1 on success, 0 on failure
1378 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1385 path = fdt_getprop(fdt, anode, alias, NULL);
1387 /* If there's no such alias, then it's not a failure */
1391 node = fdt_path_offset(fdt, path);
1393 printf("Warning: device tree alias '%s' points to invalid "
1394 "node %s.\n", alias, path);
1398 reg = fdt_getprop(fdt, node, "reg", &len);
1400 printf("Warning: device tree node '%s' has no address.\n",
1405 dt_addr = fdt_translate_address(fdt, node, reg);
1406 if (addr != dt_addr) {
1407 printf("Warning: U-Boot configured device %s at address %"
1408 PRIx64 ",\n but the device tree has it address %"
1409 PRIx64 ".\n", alias, addr, dt_addr);
1417 * Returns the base address of an SOC or PCI node
1419 u64 fdt_get_base_address(void *fdt, int node)
1423 const fdt32_t *prop;
1425 naddr = fdt_address_cells(fdt, node);
1427 prop = fdt_getprop(fdt, node, "ranges", &size);
1429 return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0;
1433 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1435 static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1436 uint64_t *val, int cells)
1438 const fdt32_t *prop32 = &prop[cell_off];
1439 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];
1441 if ((cell_off + cells) > prop_len)
1442 return -FDT_ERR_NOSPACE;
1446 *val = fdt32_to_cpu(*prop32);
1449 *val = fdt64_to_cpu(*prop64);
1452 return -FDT_ERR_NOSPACE;
1459 * fdt_read_range - Read a node's n'th range property
1461 * @fdt: ptr to device tree
1462 * @node: offset of node
1464 * @child_addr: pointer to storage for the "child address" field
1465 * @addr: pointer to storage for the CPU view translated physical start
1466 * @len: pointer to storage for the range length
1468 * Convenience function that reads and interprets a specific range out of
1469 * a number of the "ranges" property array.
1471 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1472 uint64_t *addr, uint64_t *len)
1474 int pnode = fdt_parent_offset(fdt, node);
1475 const fdt32_t *ranges;
1484 * The "ranges" property is an array of
1485 * { <child address> <parent address> <size in child address space> }
1487 * All 3 elements can span a diffent number of cells. Fetch their size.
1489 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1490 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1491 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1493 /* Now try to get the ranges property */
1494 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1496 return -FDT_ERR_NOTFOUND;
1497 ranges_len /= sizeof(uint32_t);
1499 /* Jump to the n'th entry */
1500 cell = n * (pacells + acells + scells);
1502 /* Read <child address> */
1504 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1511 /* Read <parent address> */
1513 *addr = fdt_translate_address(fdt, node, ranges + cell);
1516 /* Read <size in child address space> */
1518 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
1527 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1529 * @fdt: ptr to device tree
1530 * @node: offset of the simplefb node
1531 * @base_address: framebuffer base address
1532 * @width: width in pixels
1533 * @height: height in pixels
1534 * @stride: bytes per line
1535 * @format: pixel format string
1537 * Convenience function to fill and enable a simplefb node.
1539 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
1540 u32 height, u32 stride, const char *format)
1544 int i, addrc, sizec, ret;
1546 of_bus_default_count_cells(fdt, fdt_parent_offset(fdt, node),
1550 cells[i++] = cpu_to_fdt32(base_address >> 32);
1551 cells[i++] = cpu_to_fdt32(base_address);
1554 cells[i++] = cpu_to_fdt32(height * stride);
1556 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
1560 snprintf(name, sizeof(name), "framebuffer@%" PRIx64, base_address);
1561 ret = fdt_set_name(fdt, node, name);
1565 ret = fdt_setprop_u32(fdt, node, "width", width);
1569 ret = fdt_setprop_u32(fdt, node, "height", height);
1573 ret = fdt_setprop_u32(fdt, node, "stride", stride);
1577 ret = fdt_setprop_string(fdt, node, "format", format);
1581 ret = fdt_setprop_string(fdt, node, "status", "okay");
1589 * Update native-mode in display-timings from display environment variable.
1590 * The node to update are specified by path.
1592 int fdt_fixup_display(void *blob, const char *path, const char *display)
1596 if (!display || !path)
1597 return -FDT_ERR_NOTFOUND;
1599 toff = fdt_path_offset(blob, path);
1601 toff = fdt_subnode_offset(blob, toff, "display-timings");
1605 for (off = fdt_first_subnode(blob, toff);
1607 off = fdt_next_subnode(blob, off)) {
1608 uint32_t h = fdt_get_phandle(blob, off);
1609 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL),
1611 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0)
1612 return fdt_setprop_u32(blob, toff, "native-mode", h);