3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
5 * Copyright 2010-2011 Freescale Semiconductor, Inc.
7 * SPDX-License-Identifier: GPL-2.0+
11 #include <stdio_dev.h>
12 #include <linux/ctype.h>
13 #include <linux/types.h>
14 #include <asm/global_data.h>
16 #include <fdt_support.h>
20 * Get cells len in bytes
21 * if #NNNN-cells property is 2 then len is 8
24 static int get_cells_len(void *blob, char *nr_cells_name)
28 cell = fdt_getprop(blob, 0, nr_cells_name, NULL);
29 if (cell && fdt32_to_cpu(*cell) == 2)
36 * Write a 4 or 8 byte big endian cell
38 static void write_cell(u8 *addr, u64 val, int size)
40 int shift = (size - 1) * 8;
42 *addr++ = (val >> shift) & 0xff;
48 * fdt_getprop_u32_default_node - Return a node's property or a default
50 * @fdt: ptr to device tree
51 * @off: offset of node
52 * @cell: cell offset in property
53 * @prop: property name
54 * @dflt: default value if the property isn't found
56 * Convenience function to return a node's property or a default value if
57 * the property doesn't exist.
59 u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
60 const char *prop, const u32 dflt)
65 val = fdt_getprop(fdt, off, prop, &len);
67 /* Check if property exists */
71 /* Check if property is long enough */
72 if (len < ((cell + 1) * sizeof(uint32_t)))
75 return fdt32_to_cpu(*val);
79 * fdt_getprop_u32_default - Find a node and return it's property or a default
81 * @fdt: ptr to device tree
83 * @prop: property name
84 * @dflt: default value if the property isn't found
86 * Convenience function to find a node and return it's property or a
87 * default value if it doesn't exist.
89 u32 fdt_getprop_u32_default(const void *fdt, const char *path,
90 const char *prop, const u32 dflt)
94 off = fdt_path_offset(fdt, path);
98 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt);
102 * fdt_find_and_setprop: Find a node and set it's property
104 * @fdt: ptr to device tree
105 * @node: path of node
106 * @prop: property name
107 * @val: ptr to new value
108 * @len: length of new property value
109 * @create: flag to create the property if it doesn't exist
111 * Convenience function to directly set a property given the path to the node.
113 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
114 const void *val, int len, int create)
116 int nodeoff = fdt_path_offset(fdt, node);
121 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
122 return 0; /* create flag not set; so exit quietly */
124 return fdt_setprop(fdt, nodeoff, prop, val, len);
127 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS
129 #ifdef CONFIG_CONS_INDEX
130 static void fdt_fill_multisername(char *sername, size_t maxlen)
132 const char *outname = stdio_devices[stdout]->name;
134 if (strcmp(outname, "serial") > 0)
135 strncpy(sername, outname, maxlen);
138 if (strcmp(outname + 1, "serial") > 0)
139 strncpy(sername, outname + 1, maxlen);
143 static int fdt_fixup_stdout(void *fdt, int chosenoff)
146 #ifdef CONFIG_CONS_INDEX
148 char sername[9] = { 0 };
151 fdt_fill_multisername(sername, sizeof(sername) - 1);
153 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
155 err = node = fdt_path_offset(fdt, "/aliases");
158 path = fdt_getprop(fdt, node, sername, &len);
160 char *p = malloc(len);
161 err = -FDT_ERR_NOSPACE;
163 memcpy(p, path, len);
164 err = fdt_setprop(fdt, chosenoff,
165 "linux,stdout-path", p, len);
174 printf("WARNING: could not set linux,stdout-path %s.\n",
181 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force)
183 int nodeoffset, addr_cell_len;
189 /* Find the "chosen" node. */
190 nodeoffset = fdt_path_offset (fdt, "/chosen");
192 /* If there is no "chosen" node in the blob return */
193 if (nodeoffset < 0) {
194 printf("fdt_initrd: %s\n", fdt_strerror(nodeoffset));
198 /* just return if initrd_start/end aren't valid */
199 if ((initrd_start == 0) || (initrd_end == 0))
202 total = fdt_num_mem_rsv(fdt);
205 * Look for an existing entry and update it. If we don't find
206 * the entry, we will j be the next available slot.
208 for (j = 0; j < total; j++) {
209 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
210 if (addr == initrd_start) {
211 fdt_del_mem_rsv(fdt, j);
216 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
218 printf("fdt_initrd: %s\n", fdt_strerror(err));
222 addr_cell_len = get_cells_len(fdt, "#address-cells");
224 path = fdt_getprop(fdt, nodeoffset, "linux,initrd-start", NULL);
225 if ((path == NULL) || force) {
226 write_cell((u8 *)&tmp, initrd_start, addr_cell_len);
227 err = fdt_setprop(fdt, nodeoffset,
228 "linux,initrd-start", &tmp, addr_cell_len);
231 "could not set linux,initrd-start %s.\n",
235 write_cell((u8 *)&tmp, initrd_end, addr_cell_len);
236 err = fdt_setprop(fdt, nodeoffset,
237 "linux,initrd-end", &tmp, addr_cell_len);
239 printf("WARNING: could not set linux,initrd-end %s.\n",
249 int fdt_chosen(void *fdt, int force)
253 char *str; /* used to set string properties */
256 err = fdt_check_header(fdt);
258 printf("fdt_chosen: %s\n", fdt_strerror(err));
263 * Find the "chosen" node.
265 nodeoffset = fdt_path_offset (fdt, "/chosen");
268 * If there is no "chosen" node in the blob, create it.
270 if (nodeoffset < 0) {
272 * Create a new node "/chosen" (offset 0 is root level)
274 nodeoffset = fdt_add_subnode(fdt, 0, "chosen");
275 if (nodeoffset < 0) {
276 printf("WARNING: could not create /chosen %s.\n",
277 fdt_strerror(nodeoffset));
283 * Create /chosen properites that don't exist in the fdt.
284 * If the property exists, update it only if the "force" parameter
287 str = getenv("bootargs");
289 path = fdt_getprop(fdt, nodeoffset, "bootargs", NULL);
290 if ((path == NULL) || force) {
291 err = fdt_setprop(fdt, nodeoffset,
292 "bootargs", str, strlen(str)+1);
294 printf("WARNING: could not set bootargs %s.\n",
299 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS
300 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
301 if ((path == NULL) || force)
302 err = fdt_fixup_stdout(fdt, nodeoffset);
305 #ifdef OF_STDOUT_PATH
306 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
307 if ((path == NULL) || force) {
308 err = fdt_setprop(fdt, nodeoffset,
309 "linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1);
311 printf("WARNING: could not set linux,stdout-path %s.\n",
319 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
320 const void *val, int len, int create)
324 debug("Updating property '%s/%s' = ", path, prop);
325 for (i = 0; i < len; i++)
326 debug(" %.2x", *(u8*)(val+i));
329 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
331 printf("Unable to update property %s:%s, err=%s\n",
332 path, prop, fdt_strerror(rc));
335 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
338 fdt32_t tmp = cpu_to_fdt32(val);
339 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
342 void do_fixup_by_prop(void *fdt,
343 const char *pname, const void *pval, int plen,
344 const char *prop, const void *val, int len,
350 debug("Updating property '%s' = ", prop);
351 for (i = 0; i < len; i++)
352 debug(" %.2x", *(u8*)(val+i));
355 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
356 while (off != -FDT_ERR_NOTFOUND) {
357 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
358 fdt_setprop(fdt, off, prop, val, len);
359 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
363 void do_fixup_by_prop_u32(void *fdt,
364 const char *pname, const void *pval, int plen,
365 const char *prop, u32 val, int create)
367 fdt32_t tmp = cpu_to_fdt32(val);
368 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
371 void do_fixup_by_compat(void *fdt, const char *compat,
372 const char *prop, const void *val, int len, int create)
377 debug("Updating property '%s' = ", prop);
378 for (i = 0; i < len; i++)
379 debug(" %.2x", *(u8*)(val+i));
382 off = fdt_node_offset_by_compatible(fdt, -1, compat);
383 while (off != -FDT_ERR_NOTFOUND) {
384 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
385 fdt_setprop(fdt, off, prop, val, len);
386 off = fdt_node_offset_by_compatible(fdt, off, compat);
390 void do_fixup_by_compat_u32(void *fdt, const char *compat,
391 const char *prop, u32 val, int create)
393 fdt32_t tmp = cpu_to_fdt32(val);
394 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
397 #ifdef CONFIG_NR_DRAM_BANKS
398 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
400 #define MEMORY_BANKS_MAX 4
402 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
405 int addr_cell_len, size_cell_len, len;
406 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
409 if (banks > MEMORY_BANKS_MAX) {
410 printf("%s: num banks %d exceeds hardcoded limit %d."
411 " Recompile with higher MEMORY_BANKS_MAX?\n",
412 __FUNCTION__, banks, MEMORY_BANKS_MAX);
416 err = fdt_check_header(blob);
418 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
422 /* update, or add and update /memory node */
423 nodeoffset = fdt_path_offset(blob, "/memory");
424 if (nodeoffset < 0) {
425 nodeoffset = fdt_add_subnode(blob, 0, "memory");
426 if (nodeoffset < 0) {
427 printf("WARNING: could not create /memory: %s.\n",
428 fdt_strerror(nodeoffset));
432 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
435 printf("WARNING: could not set %s %s.\n", "device_type",
440 addr_cell_len = get_cells_len(blob, "#address-cells");
441 size_cell_len = get_cells_len(blob, "#size-cells");
443 for (bank = 0, len = 0; bank < banks; bank++) {
444 write_cell(tmp + len, start[bank], addr_cell_len);
445 len += addr_cell_len;
447 write_cell(tmp + len, size[bank], size_cell_len);
448 len += size_cell_len;
451 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
453 printf("WARNING: could not set %s %s.\n",
454 "reg", fdt_strerror(err));
460 int fdt_fixup_memory(void *blob, u64 start, u64 size)
462 return fdt_fixup_memory_banks(blob, &start, &size, 1);
465 void fdt_fixup_ethernet(void *fdt)
468 char enet[16], *tmp, *end;
471 unsigned char mac_addr[6];
473 node = fdt_path_offset(fdt, "/aliases");
477 if (!getenv("ethaddr")) {
478 if (getenv("usbethaddr")) {
479 strcpy(mac, "usbethaddr");
481 debug("No ethernet MAC Address defined\n");
485 strcpy(mac, "ethaddr");
489 while ((tmp = getenv(mac)) != NULL) {
490 sprintf(enet, "ethernet%d", i);
491 path = fdt_getprop(fdt, node, enet, NULL);
493 debug("No alias for %s\n", enet);
494 sprintf(mac, "eth%daddr", ++i);
498 for (j = 0; j < 6; j++) {
499 mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
501 tmp = (*end) ? end+1 : end;
504 do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0);
505 do_fixup_by_path(fdt, path, "local-mac-address",
508 sprintf(mac, "eth%daddr", ++i);
512 /* Resize the fdt to its actual size + a bit of padding */
513 int fdt_resize(void *blob)
523 total = fdt_num_mem_rsv(blob);
524 for (i = 0; i < total; i++) {
525 fdt_get_mem_rsv(blob, i, &addr, &size);
526 if (addr == (uintptr_t)blob) {
527 fdt_del_mem_rsv(blob, i);
533 * Calculate the actual size of the fdt
534 * plus the size needed for 5 fdt_add_mem_rsv, one
535 * for the fdt itself and 4 for a possible initrd
536 * ((initrd-start + initrd-end) * 2 (name & value))
538 actualsize = fdt_off_dt_strings(blob) +
539 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
541 /* Make it so the fdt ends on a page boundary */
542 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
543 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
545 /* Change the fdt header to reflect the correct size */
546 fdt_set_totalsize(blob, actualsize);
548 /* Add the new reservation */
549 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize);
557 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
559 #define FDT_PCI_PREFETCH (0x40000000)
560 #define FDT_PCI_MEM32 (0x02000000)
561 #define FDT_PCI_IO (0x01000000)
562 #define FDT_PCI_MEM64 (0x03000000)
564 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
566 int addrcell, sizecell, len, r;
568 /* sized based on pci addr cells, size-cells, & address-cells */
569 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
571 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
572 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
574 dma_range = &dma_ranges[0];
575 for (r = 0; r < hose->region_count; r++) {
576 u64 bus_start, phys_start, size;
578 /* skip if !PCI_REGION_SYS_MEMORY */
579 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
582 bus_start = (u64)hose->regions[r].bus_start;
583 phys_start = (u64)hose->regions[r].phys_start;
584 size = (u64)hose->regions[r].size;
587 if (size >= 0x100000000ull)
588 dma_range[0] |= FDT_PCI_MEM64;
590 dma_range[0] |= FDT_PCI_MEM32;
591 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
592 dma_range[0] |= FDT_PCI_PREFETCH;
593 #ifdef CONFIG_SYS_PCI_64BIT
594 dma_range[1] = bus_start >> 32;
598 dma_range[2] = bus_start & 0xffffffff;
601 dma_range[3] = phys_start >> 32;
602 dma_range[4] = phys_start & 0xffffffff;
604 dma_range[3] = phys_start & 0xffffffff;
608 dma_range[3 + addrcell + 0] = size >> 32;
609 dma_range[3 + addrcell + 1] = size & 0xffffffff;
611 dma_range[3 + addrcell + 0] = size & 0xffffffff;
614 dma_range += (3 + addrcell + sizecell);
617 len = dma_range - &dma_ranges[0];
619 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
625 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
627 * Provide a weak default function to return the flash bank size.
628 * There might be multiple non-identical flash chips connected to one
629 * chip-select, so we need to pass an index as well.
631 u32 __flash_get_bank_size(int cs, int idx)
633 extern flash_info_t flash_info[];
636 * As default, a simple 1:1 mapping is provided. Boards with
637 * a different mapping need to supply a board specific mapping
640 return flash_info[cs].size;
642 u32 flash_get_bank_size(int cs, int idx)
643 __attribute__((weak, alias("__flash_get_bank_size")));
646 * This function can be used to update the size in the "reg" property
647 * of all NOR FLASH device nodes. This is necessary for boards with
648 * non-fixed NOR FLASH sizes.
650 int fdt_fixup_nor_flash_size(void *blob)
652 char compat[][16] = { "cfi-flash", "jedec-flash" };
655 struct fdt_property *prop;
659 for (i = 0; i < 2; i++) {
660 off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
661 while (off != -FDT_ERR_NOTFOUND) {
665 * Found one compatible node, so fixup the size
666 * int its reg properties
668 prop = fdt_get_property_w(blob, off, "reg", &len);
670 int tuple_size = 3 * sizeof(reg);
673 * There might be multiple reg-tuples,
674 * so loop through them all
676 reg = reg2 = (u32 *)&prop->data[0];
677 for (idx = 0; idx < (len / tuple_size); idx++) {
679 * Update size in reg property
681 reg[2] = flash_get_bank_size(reg[0],
685 * Point to next reg tuple
690 fdt_setprop(blob, off, "reg", reg2, len);
693 /* Move to next compatible node */
694 off = fdt_node_offset_by_compatible(blob, off,
703 int fdt_increase_size(void *fdt, int add_len)
707 newlen = fdt_totalsize(fdt) + add_len;
709 /* Open in place with a new len */
710 return fdt_open_into(fdt, fdt, newlen);
713 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
714 #include <jffs2/load_kernel.h>
715 #include <mtd_node.h>
722 int fdt_del_subnodes(const void *blob, int parent_offset)
727 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
728 (off >= 0) && (ndepth > 0);
729 off = fdt_next_node(blob, off, &ndepth)) {
731 debug("delete %s: offset: %x\n",
732 fdt_get_name(blob, off, 0), off);
733 ret = fdt_del_node((void *)blob, off);
735 printf("Can't delete node: %s\n",
747 int fdt_del_partitions(void *blob, int parent_offset)
754 off = fdt_next_node(blob, parent_offset, &ndepth);
755 if (off > 0 && ndepth == 1) {
756 prop = fdt_getprop(blob, off, "label", NULL);
759 * Could not find label property, nand {}; node?
760 * Check subnode, delete partitions there if any.
762 return fdt_del_partitions(blob, off);
764 ret = fdt_del_subnodes(blob, parent_offset);
766 printf("Can't remove subnodes: %s\n",
775 int fdt_node_set_part_info(void *blob, int parent_offset,
776 struct mtd_device *dev)
778 struct list_head *pentry;
779 struct part_info *part;
780 struct reg_cell cell;
785 ret = fdt_del_partitions(blob, parent_offset);
790 * Check if it is nand {}; subnode, adjust
791 * the offset in this case
793 off = fdt_next_node(blob, parent_offset, &ndepth);
794 if (off > 0 && ndepth == 1)
798 list_for_each_prev(pentry, &dev->parts) {
801 part = list_entry(pentry, struct part_info, link);
803 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
804 part_num, part->name, part->size,
805 part->offset, part->mask_flags);
807 sprintf(buf, "partition@%llx", part->offset);
809 ret = fdt_add_subnode(blob, parent_offset, buf);
810 if (ret == -FDT_ERR_NOSPACE) {
811 ret = fdt_increase_size(blob, 512);
816 } else if (ret < 0) {
817 printf("Can't add partition node: %s\n",
823 /* Check MTD_WRITEABLE_CMD flag */
824 if (part->mask_flags & 1) {
826 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
827 if (ret == -FDT_ERR_NOSPACE) {
828 ret = fdt_increase_size(blob, 512);
837 cell.r0 = cpu_to_fdt32(part->offset);
838 cell.r1 = cpu_to_fdt32(part->size);
840 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
841 if (ret == -FDT_ERR_NOSPACE) {
842 ret = fdt_increase_size(blob, 512);
851 ret = fdt_setprop_string(blob, newoff, "label", part->name);
852 if (ret == -FDT_ERR_NOSPACE) {
853 ret = fdt_increase_size(blob, 512);
865 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
868 printf("Can't add property: %s\n", fdt_strerror(ret));
873 * Update partitions in nor/nand nodes using info from
874 * mtdparts environment variable. The nodes to update are
875 * specified by node_info structure which contains mtd device
876 * type and compatible string: E. g. the board code in
877 * ft_board_setup() could use:
879 * struct node_info nodes[] = {
880 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
881 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
884 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
886 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
888 struct node_info *ni = node_info;
889 struct mtd_device *dev;
894 parts = getenv("mtdparts");
898 if (mtdparts_init() != 0)
901 for (i = 0; i < node_info_size; i++) {
903 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
904 while (noff != -FDT_ERR_NOTFOUND) {
905 debug("%s: %s, mtd dev type %d\n",
906 fdt_get_name(blob, noff, 0),
907 ni[i].compat, ni[i].type);
908 dev = device_find(ni[i].type, idx++);
910 if (fdt_node_set_part_info(blob, noff, dev))
911 return; /* return on error */
914 /* Jump to next flash node */
915 noff = fdt_node_offset_by_compatible(blob, noff,
922 void fdt_del_node_and_alias(void *blob, const char *alias)
924 int off = fdt_path_offset(blob, alias);
929 fdt_del_node(blob, off);
931 off = fdt_path_offset(blob, "/aliases");
932 fdt_delprop(blob, off, alias);
935 /* Helper to read a big number; size is in cells (not bytes) */
936 static inline u64 of_read_number(const fdt32_t *cell, int size)
940 r = (r << 32) | fdt32_to_cpu(*(cell++));
946 /* Max address size we deal with */
947 #define OF_MAX_ADDR_CELLS 4
948 #define OF_BAD_ADDR ((u64)-1)
949 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
954 static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
958 printf(" %08x", *(addr++));
962 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
965 /* Callbacks for bus specific translators */
968 const char *addresses;
969 void (*count_cells)(void *blob, int parentoffset,
970 int *addrc, int *sizec);
971 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
972 int na, int ns, int pna);
973 int (*translate)(fdt32_t *addr, u64 offset, int na);
976 /* Default translator (generic bus) */
977 static void of_bus_default_count_cells(void *blob, int parentoffset,
978 int *addrc, int *sizec)
983 prop = fdt_getprop(blob, parentoffset, "#address-cells", NULL);
985 *addrc = be32_to_cpup(prop);
991 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
993 *sizec = be32_to_cpup(prop);
999 static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
1000 int na, int ns, int pna)
1004 cp = of_read_number(range, na);
1005 s = of_read_number(range + na + pna, ns);
1006 da = of_read_number(addr, na);
1008 debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n",
1011 if (da < cp || da >= (cp + s))
1016 static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
1018 u64 a = of_read_number(addr, na);
1019 memset(addr, 0, na * 4);
1022 addr[na - 2] = cpu_to_fdt32(a >> 32);
1023 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
1028 /* Array of bus specific translators */
1029 static struct of_bus of_busses[] = {
1034 .count_cells = of_bus_default_count_cells,
1035 .map = of_bus_default_map,
1036 .translate = of_bus_default_translate,
1040 static int of_translate_one(void * blob, int parent, struct of_bus *bus,
1041 struct of_bus *pbus, fdt32_t *addr,
1042 int na, int ns, int pna, const char *rprop)
1044 const fdt32_t *ranges;
1047 u64 offset = OF_BAD_ADDR;
1049 /* Normally, an absence of a "ranges" property means we are
1050 * crossing a non-translatable boundary, and thus the addresses
1051 * below the current not cannot be converted to CPU physical ones.
1052 * Unfortunately, while this is very clear in the spec, it's not
1053 * what Apple understood, and they do have things like /uni-n or
1054 * /ht nodes with no "ranges" property and a lot of perfectly
1055 * useable mapped devices below them. Thus we treat the absence of
1056 * "ranges" as equivalent to an empty "ranges" property which means
1057 * a 1:1 translation at that level. It's up to the caller not to try
1058 * to translate addresses that aren't supposed to be translated in
1059 * the first place. --BenH.
1061 ranges = fdt_getprop(blob, parent, rprop, &rlen);
1062 if (ranges == NULL || rlen == 0) {
1063 offset = of_read_number(addr, na);
1064 memset(addr, 0, pna * 4);
1065 debug("OF: no ranges, 1:1 translation\n");
1069 debug("OF: walking ranges...\n");
1071 /* Now walk through the ranges */
1073 rone = na + pna + ns;
1074 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1075 offset = bus->map(addr, ranges, na, ns, pna);
1076 if (offset != OF_BAD_ADDR)
1079 if (offset == OF_BAD_ADDR) {
1080 debug("OF: not found !\n");
1083 memcpy(addr, ranges + na, 4 * pna);
1086 of_dump_addr("OF: parent translation for:", addr, pna);
1087 debug("OF: with offset: "PRu64"\n", offset);
1089 /* Translate it into parent bus space */
1090 return pbus->translate(addr, offset, pna);
1094 * Translate an address from the device-tree into a CPU physical address,
1095 * this walks up the tree and applies the various bus mappings on the
1098 * Note: We consider that crossing any level with #size-cells == 0 to mean
1099 * that translation is impossible (that is we are not dealing with a value
1100 * that can be mapped to a cpu physical address). This is not really specified
1101 * that way, but this is traditionally the way IBM at least do things
1103 static u64 __of_translate_address(void *blob, int node_offset, const fdt32_t *in_addr,
1107 struct of_bus *bus, *pbus;
1108 fdt32_t addr[OF_MAX_ADDR_CELLS];
1109 int na, ns, pna, pns;
1110 u64 result = OF_BAD_ADDR;
1112 debug("OF: ** translation for device %s **\n",
1113 fdt_get_name(blob, node_offset, NULL));
1115 /* Get parent & match bus type */
1116 parent = fdt_parent_offset(blob, node_offset);
1119 bus = &of_busses[0];
1121 /* Cound address cells & copy address locally */
1122 bus->count_cells(blob, parent, &na, &ns);
1123 if (!OF_CHECK_COUNTS(na, ns)) {
1124 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1125 fdt_get_name(blob, node_offset, NULL));
1128 memcpy(addr, in_addr, na * 4);
1130 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1131 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1132 of_dump_addr("OF: translating address:", addr, na);
1136 /* Switch to parent bus */
1137 node_offset = parent;
1138 parent = fdt_parent_offset(blob, node_offset);
1140 /* If root, we have finished */
1142 debug("OF: reached root node\n");
1143 result = of_read_number(addr, na);
1147 /* Get new parent bus and counts */
1148 pbus = &of_busses[0];
1149 pbus->count_cells(blob, parent, &pna, &pns);
1150 if (!OF_CHECK_COUNTS(pna, pns)) {
1151 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1152 fdt_get_name(blob, node_offset, NULL));
1156 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1157 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1159 /* Apply bus translation */
1160 if (of_translate_one(blob, node_offset, bus, pbus,
1161 addr, na, ns, pna, rprop))
1164 /* Complete the move up one level */
1169 of_dump_addr("OF: one level translation:", addr, na);
1176 u64 fdt_translate_address(void *blob, int node_offset, const fdt32_t *in_addr)
1178 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1182 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1183 * who's reg property matches a physical cpu address
1185 * @blob: ptr to device tree
1186 * @compat: compatiable string to match
1187 * @compat_off: property name
1190 int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1191 phys_addr_t compat_off)
1193 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1194 while (off != -FDT_ERR_NOTFOUND) {
1195 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
1197 if (compat_off == fdt_translate_address(blob, off, reg))
1200 off = fdt_node_offset_by_compatible(blob, off, compat);
1203 return -FDT_ERR_NOTFOUND;
1207 * fdt_alloc_phandle: Return next free phandle value
1209 * @blob: ptr to device tree
1211 int fdt_alloc_phandle(void *blob)
1213 int offset, phandle = 0;
1215 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1216 offset = fdt_next_node(blob, offset, NULL)) {
1217 phandle = max(phandle, fdt_get_phandle(blob, offset));
1224 * fdt_set_phandle: Create a phandle property for the given node
1226 * @fdt: ptr to device tree
1227 * @nodeoffset: node to update
1228 * @phandle: phandle value to set (must be unique)
1230 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
1235 int off = fdt_node_offset_by_phandle(fdt, phandle);
1237 if ((off >= 0) && (off != nodeoffset)) {
1240 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1241 printf("Trying to update node %s with phandle %u ",
1244 fdt_get_path(fdt, off, buf, sizeof(buf));
1245 printf("that already exists in node %s.\n", buf);
1246 return -FDT_ERR_BADPHANDLE;
1250 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1255 * For now, also set the deprecated "linux,phandle" property, so that we
1256 * don't break older kernels.
1258 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1264 * fdt_create_phandle: Create a phandle property for the given node
1266 * @fdt: ptr to device tree
1267 * @nodeoffset: node to update
1269 unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
1271 /* see if there is a phandle already */
1272 int phandle = fdt_get_phandle(fdt, nodeoffset);
1274 /* if we got 0, means no phandle so create one */
1278 phandle = fdt_alloc_phandle(fdt);
1279 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1281 printf("Can't set phandle %u: %s\n", phandle,
1291 * fdt_set_node_status: Set status for the given node
1293 * @fdt: ptr to device tree
1294 * @nodeoffset: node to update
1295 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1296 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1297 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1299 int fdt_set_node_status(void *fdt, int nodeoffset,
1300 enum fdt_status status, unsigned int error_code)
1309 case FDT_STATUS_OKAY:
1310 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1312 case FDT_STATUS_DISABLED:
1313 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1315 case FDT_STATUS_FAIL:
1316 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1318 case FDT_STATUS_FAIL_ERROR_CODE:
1319 sprintf(buf, "fail-%d", error_code);
1320 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1323 printf("Invalid fdt status: %x\n", status);
1332 * fdt_set_status_by_alias: Set status for the given node given an alias
1334 * @fdt: ptr to device tree
1335 * @alias: alias of node to update
1336 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1337 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1338 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1340 int fdt_set_status_by_alias(void *fdt, const char* alias,
1341 enum fdt_status status, unsigned int error_code)
1343 int offset = fdt_path_offset(fdt, alias);
1345 return fdt_set_node_status(fdt, offset, status, error_code);
1348 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
1349 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1354 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1355 if (noff != -FDT_ERR_NOTFOUND) {
1356 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1358 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1359 if (ret == -FDT_ERR_NOSPACE) {
1360 ret = fdt_increase_size(blob, 512);
1365 } else if (ret < 0) {
1366 printf("Can't add property: %s\n", fdt_strerror(ret));
1372 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1378 * Verify the physical address of device tree node for a given alias
1380 * This function locates the device tree node of a given alias, and then
1381 * verifies that the physical address of that device matches the given
1382 * parameter. It displays a message if there is a mismatch.
1384 * Returns 1 on success, 0 on failure
1386 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1393 path = fdt_getprop(fdt, anode, alias, NULL);
1395 /* If there's no such alias, then it's not a failure */
1399 node = fdt_path_offset(fdt, path);
1401 printf("Warning: device tree alias '%s' points to invalid "
1402 "node %s.\n", alias, path);
1406 reg = fdt_getprop(fdt, node, "reg", &len);
1408 printf("Warning: device tree node '%s' has no address.\n",
1413 dt_addr = fdt_translate_address(fdt, node, reg);
1414 if (addr != dt_addr) {
1415 printf("Warning: U-Boot configured device %s at address %llx,\n"
1416 " but the device tree has it address %llx.\n",
1417 alias, addr, dt_addr);
1425 * Returns the base address of an SOC or PCI node
1427 u64 fdt_get_base_address(void *fdt, int node)
1431 const fdt32_t *prop;
1433 prop = fdt_getprop(fdt, node, "#address-cells", &size);
1434 if (prop && size == 4)
1435 naddr = be32_to_cpup(prop);
1439 prop = fdt_getprop(fdt, node, "ranges", &size);
1441 return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0;
1445 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1447 static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1448 uint64_t *val, int cells)
1450 const fdt32_t *prop32 = &prop[cell_off];
1451 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];
1453 if ((cell_off + cells) > prop_len)
1454 return -FDT_ERR_NOSPACE;
1458 *val = fdt32_to_cpu(*prop32);
1461 *val = fdt64_to_cpu(*prop64);
1464 return -FDT_ERR_NOSPACE;
1471 * fdt_read_range - Read a node's n'th range property
1473 * @fdt: ptr to device tree
1474 * @node: offset of node
1476 * @child_addr: pointer to storage for the "child address" field
1477 * @addr: pointer to storage for the CPU view translated physical start
1478 * @len: pointer to storage for the range length
1480 * Convenience function that reads and interprets a specific range out of
1481 * a number of the "ranges" property array.
1483 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1484 uint64_t *addr, uint64_t *len)
1486 int pnode = fdt_parent_offset(fdt, node);
1487 const fdt32_t *ranges;
1496 * The "ranges" property is an array of
1497 * { <child address> <parent address> <size in child address space> }
1499 * All 3 elements can span a diffent number of cells. Fetch their size.
1501 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1502 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1503 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1505 /* Now try to get the ranges property */
1506 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1508 return -FDT_ERR_NOTFOUND;
1509 ranges_len /= sizeof(uint32_t);
1511 /* Jump to the n'th entry */
1512 cell = n * (pacells + acells + scells);
1514 /* Read <child address> */
1516 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1523 /* Read <parent address> */
1525 *addr = fdt_translate_address(fdt, node, ranges + cell);
1528 /* Read <size in child address space> */
1530 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);