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>
21 * fdt_getprop_u32_default_node - Return a node's property or a default
23 * @fdt: ptr to device tree
24 * @off: offset of node
25 * @cell: cell offset in property
26 * @prop: property name
27 * @dflt: default value if the property isn't found
29 * Convenience function to return a node's property or a default value if
30 * the property doesn't exist.
32 u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
33 const char *prop, const u32 dflt)
38 val = fdt_getprop(fdt, off, prop, &len);
40 /* Check if property exists */
44 /* Check if property is long enough */
45 if (len < ((cell + 1) * sizeof(uint32_t)))
48 return fdt32_to_cpu(*val);
52 * fdt_getprop_u32_default - Find a node and return it's property or a default
54 * @fdt: ptr to device tree
56 * @prop: property name
57 * @dflt: default value if the property isn't found
59 * Convenience function to find a node and return it's property or a
60 * default value if it doesn't exist.
62 u32 fdt_getprop_u32_default(const void *fdt, const char *path,
63 const char *prop, const u32 dflt)
67 off = fdt_path_offset(fdt, path);
71 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt);
75 * fdt_find_and_setprop: Find a node and set it's property
77 * @fdt: ptr to device tree
79 * @prop: property name
80 * @val: ptr to new value
81 * @len: length of new property value
82 * @create: flag to create the property if it doesn't exist
84 * Convenience function to directly set a property given the path to the node.
86 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
87 const void *val, int len, int create)
89 int nodeoff = fdt_path_offset(fdt, node);
94 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
95 return 0; /* create flag not set; so exit quietly */
97 return fdt_setprop(fdt, nodeoff, prop, val, len);
101 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
103 * @fdt: pointer to the device tree blob
104 * @parentoffset: structure block offset of a node
105 * @name: name of the subnode to locate
107 * fdt_subnode_offset() finds a subnode of the node with a given name.
108 * If the subnode does not exist, it will be created.
110 int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name)
114 offset = fdt_subnode_offset(fdt, parentoffset, name);
116 if (offset == -FDT_ERR_NOTFOUND)
117 offset = fdt_add_subnode(fdt, parentoffset, name);
120 printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset));
125 /* rename to CONFIG_OF_STDOUT_PATH ? */
126 #if defined(OF_STDOUT_PATH)
127 static int fdt_fixup_stdout(void *fdt, int chosenoff)
129 return fdt_setprop(fdt, chosenoff, "linux,stdout-path",
130 OF_STDOUT_PATH, strlen(OF_STDOUT_PATH) + 1);
132 #elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
133 static void fdt_fill_multisername(char *sername, size_t maxlen)
135 const char *outname = stdio_devices[stdout]->name;
137 if (strcmp(outname, "serial") > 0)
138 strncpy(sername, outname, maxlen);
141 if (strcmp(outname + 1, "serial") > 0)
142 strncpy(sername, outname + 1, maxlen);
145 static int fdt_fixup_stdout(void *fdt, int chosenoff)
149 char sername[9] = { 0 };
152 char tmp[256]; /* long enough */
154 fdt_fill_multisername(sername, sizeof(sername) - 1);
156 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
158 aliasoff = fdt_path_offset(fdt, "/aliases");
164 path = fdt_getprop(fdt, aliasoff, sername, &len);
170 /* fdt_setprop may break "path" so we copy it to tmp buffer */
171 memcpy(tmp, path, len);
173 err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len);
176 printf("WARNING: could not set linux,stdout-path %s.\n",
182 static int fdt_fixup_stdout(void *fdt, int chosenoff)
188 static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name,
189 uint64_t val, int is_u64)
192 return fdt_setprop_u64(fdt, nodeoffset, name, val);
194 return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val);
198 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end)
205 /* just return if the size of initrd is zero */
206 if (initrd_start == initrd_end)
209 /* find or create "/chosen" node. */
210 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
214 total = fdt_num_mem_rsv(fdt);
217 * Look for an existing entry and update it. If we don't find
218 * the entry, we will j be the next available slot.
220 for (j = 0; j < total; j++) {
221 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
222 if (addr == initrd_start) {
223 fdt_del_mem_rsv(fdt, j);
228 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
230 printf("fdt_initrd: %s\n", fdt_strerror(err));
234 is_u64 = (fdt_address_cells(fdt, 0) == 2);
236 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start",
237 (uint64_t)initrd_start, is_u64);
240 printf("WARNING: could not set linux,initrd-start %s.\n",
245 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end",
246 (uint64_t)initrd_end, is_u64);
249 printf("WARNING: could not set linux,initrd-end %s.\n",
258 int fdt_chosen(void *fdt)
262 char *str; /* used to set string properties */
264 err = fdt_check_header(fdt);
266 printf("fdt_chosen: %s\n", fdt_strerror(err));
270 /* find or create "/chosen" node. */
271 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
275 str = getenv("bootargs");
277 err = fdt_setprop(fdt, nodeoffset, "bootargs", str,
280 printf("WARNING: could not set bootargs %s.\n",
286 return fdt_fixup_stdout(fdt, nodeoffset);
289 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
290 const void *val, int len, int create)
294 debug("Updating property '%s/%s' = ", path, prop);
295 for (i = 0; i < len; i++)
296 debug(" %.2x", *(u8*)(val+i));
299 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
301 printf("Unable to update property %s:%s, err=%s\n",
302 path, prop, fdt_strerror(rc));
305 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
308 fdt32_t tmp = cpu_to_fdt32(val);
309 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
312 void do_fixup_by_prop(void *fdt,
313 const char *pname, const void *pval, int plen,
314 const char *prop, const void *val, int len,
320 debug("Updating property '%s' = ", prop);
321 for (i = 0; i < len; i++)
322 debug(" %.2x", *(u8*)(val+i));
325 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
326 while (off != -FDT_ERR_NOTFOUND) {
327 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
328 fdt_setprop(fdt, off, prop, val, len);
329 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
333 void do_fixup_by_prop_u32(void *fdt,
334 const char *pname, const void *pval, int plen,
335 const char *prop, u32 val, int create)
337 fdt32_t tmp = cpu_to_fdt32(val);
338 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
341 void do_fixup_by_compat(void *fdt, const char *compat,
342 const char *prop, const void *val, int len, int create)
347 debug("Updating property '%s' = ", prop);
348 for (i = 0; i < len; i++)
349 debug(" %.2x", *(u8*)(val+i));
352 off = fdt_node_offset_by_compatible(fdt, -1, compat);
353 while (off != -FDT_ERR_NOTFOUND) {
354 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
355 fdt_setprop(fdt, off, prop, val, len);
356 off = fdt_node_offset_by_compatible(fdt, off, compat);
360 void do_fixup_by_compat_u32(void *fdt, const char *compat,
361 const char *prop, u32 val, int create)
363 fdt32_t tmp = cpu_to_fdt32(val);
364 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
368 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
370 static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size,
374 int address_cells = fdt_address_cells(fdt, 0);
375 int size_cells = fdt_size_cells(fdt, 0);
378 for (i = 0; i < n; i++) {
379 if (address_cells == 2)
380 *(fdt64_t *)p = cpu_to_fdt64(address[i]);
382 *(fdt32_t *)p = cpu_to_fdt32(address[i]);
383 p += 4 * address_cells;
386 *(fdt64_t *)p = cpu_to_fdt64(size[i]);
388 *(fdt32_t *)p = cpu_to_fdt32(size[i]);
392 return p - (char *)buf;
395 #ifdef CONFIG_NR_DRAM_BANKS
396 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
398 #define MEMORY_BANKS_MAX 4
400 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
404 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
406 if (banks > MEMORY_BANKS_MAX) {
407 printf("%s: num banks %d exceeds hardcoded limit %d."
408 " Recompile with higher MEMORY_BANKS_MAX?\n",
409 __FUNCTION__, banks, MEMORY_BANKS_MAX);
413 err = fdt_check_header(blob);
415 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
419 /* find or create "/memory" node. */
420 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
424 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
427 printf("WARNING: could not set %s %s.\n", "device_type",
432 len = fdt_pack_reg(blob, tmp, start, size, banks);
434 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
436 printf("WARNING: could not set %s %s.\n",
437 "reg", fdt_strerror(err));
443 int fdt_fixup_memory(void *blob, u64 start, u64 size)
445 return fdt_fixup_memory_banks(blob, &start, &size, 1);
448 void fdt_fixup_ethernet(void *fdt)
451 char enet[16], *tmp, *end;
454 unsigned char mac_addr[6];
456 node = fdt_path_offset(fdt, "/aliases");
460 if (!getenv("ethaddr")) {
461 if (getenv("usbethaddr")) {
462 strcpy(mac, "usbethaddr");
464 debug("No ethernet MAC Address defined\n");
468 strcpy(mac, "ethaddr");
472 while ((tmp = getenv(mac)) != NULL) {
473 sprintf(enet, "ethernet%d", i);
474 path = fdt_getprop(fdt, node, enet, NULL);
476 debug("No alias for %s\n", enet);
477 sprintf(mac, "eth%daddr", ++i);
481 for (j = 0; j < 6; j++) {
482 mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
484 tmp = (*end) ? end+1 : end;
487 do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0);
488 do_fixup_by_path(fdt, path, "local-mac-address",
491 sprintf(mac, "eth%daddr", ++i);
495 /* Resize the fdt to its actual size + a bit of padding */
496 int fdt_shrink_to_minimum(void *blob)
506 total = fdt_num_mem_rsv(blob);
507 for (i = 0; i < total; i++) {
508 fdt_get_mem_rsv(blob, i, &addr, &size);
509 if (addr == (uintptr_t)blob) {
510 fdt_del_mem_rsv(blob, i);
516 * Calculate the actual size of the fdt
517 * plus the size needed for 5 fdt_add_mem_rsv, one
518 * for the fdt itself and 4 for a possible initrd
519 * ((initrd-start + initrd-end) * 2 (name & value))
521 actualsize = fdt_off_dt_strings(blob) +
522 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
524 /* Make it so the fdt ends on a page boundary */
525 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
526 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
528 /* Change the fdt header to reflect the correct size */
529 fdt_set_totalsize(blob, actualsize);
531 /* Add the new reservation */
532 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize);
535 if (getenv("fdtsize"))
536 setenv_hex("fdtsize", actualsize);
541 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
543 #define FDT_PCI_PREFETCH (0x40000000)
544 #define FDT_PCI_MEM32 (0x02000000)
545 #define FDT_PCI_IO (0x01000000)
546 #define FDT_PCI_MEM64 (0x03000000)
548 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
550 int addrcell, sizecell, len, r;
552 /* sized based on pci addr cells, size-cells, & address-cells */
553 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
555 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
556 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
558 dma_range = &dma_ranges[0];
559 for (r = 0; r < hose->region_count; r++) {
560 u64 bus_start, phys_start, size;
562 /* skip if !PCI_REGION_SYS_MEMORY */
563 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
566 bus_start = (u64)hose->regions[r].bus_start;
567 phys_start = (u64)hose->regions[r].phys_start;
568 size = (u64)hose->regions[r].size;
571 if (size >= 0x100000000ull)
572 dma_range[0] |= FDT_PCI_MEM64;
574 dma_range[0] |= FDT_PCI_MEM32;
575 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
576 dma_range[0] |= FDT_PCI_PREFETCH;
577 #ifdef CONFIG_SYS_PCI_64BIT
578 dma_range[1] = bus_start >> 32;
582 dma_range[2] = bus_start & 0xffffffff;
585 dma_range[3] = phys_start >> 32;
586 dma_range[4] = phys_start & 0xffffffff;
588 dma_range[3] = phys_start & 0xffffffff;
592 dma_range[3 + addrcell + 0] = size >> 32;
593 dma_range[3 + addrcell + 1] = size & 0xffffffff;
595 dma_range[3 + addrcell + 0] = size & 0xffffffff;
598 dma_range += (3 + addrcell + sizecell);
601 len = dma_range - &dma_ranges[0];
603 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
609 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
611 * Provide a weak default function to return the flash bank size.
612 * There might be multiple non-identical flash chips connected to one
613 * chip-select, so we need to pass an index as well.
615 u32 __flash_get_bank_size(int cs, int idx)
617 extern flash_info_t flash_info[];
620 * As default, a simple 1:1 mapping is provided. Boards with
621 * a different mapping need to supply a board specific mapping
624 return flash_info[cs].size;
626 u32 flash_get_bank_size(int cs, int idx)
627 __attribute__((weak, alias("__flash_get_bank_size")));
630 * This function can be used to update the size in the "reg" property
631 * of all NOR FLASH device nodes. This is necessary for boards with
632 * non-fixed NOR FLASH sizes.
634 int fdt_fixup_nor_flash_size(void *blob)
636 char compat[][16] = { "cfi-flash", "jedec-flash" };
639 struct fdt_property *prop;
643 for (i = 0; i < 2; i++) {
644 off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
645 while (off != -FDT_ERR_NOTFOUND) {
649 * Found one compatible node, so fixup the size
650 * int its reg properties
652 prop = fdt_get_property_w(blob, off, "reg", &len);
654 int tuple_size = 3 * sizeof(reg);
657 * There might be multiple reg-tuples,
658 * so loop through them all
660 reg = reg2 = (u32 *)&prop->data[0];
661 for (idx = 0; idx < (len / tuple_size); idx++) {
663 * Update size in reg property
665 reg[2] = flash_get_bank_size(reg[0],
669 * Point to next reg tuple
674 fdt_setprop(blob, off, "reg", reg2, len);
677 /* Move to next compatible node */
678 off = fdt_node_offset_by_compatible(blob, off,
687 int fdt_increase_size(void *fdt, int add_len)
691 newlen = fdt_totalsize(fdt) + add_len;
693 /* Open in place with a new len */
694 return fdt_open_into(fdt, fdt, newlen);
697 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
698 #include <jffs2/load_kernel.h>
699 #include <mtd_node.h>
706 static int fdt_del_subnodes(const void *blob, int parent_offset)
711 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
712 (off >= 0) && (ndepth > 0);
713 off = fdt_next_node(blob, off, &ndepth)) {
716 if (fdt_getprop(blob, off, "compatible", NULL))
718 debug("delete %s: offset: %x\n",
719 fdt_get_name(blob, off, 0), off);
720 ret = fdt_del_node((void *)blob, off);
722 printf("Can't delete node: %s\n",
733 int fdt_del_partitions(void *blob, int parent_offset)
737 int off = parent_offset;
740 while ((off = fdt_next_node(blob, off, &ndepth)) > 0) {
743 if (fdt_getprop(blob, off, "compatible", NULL))
745 prop = fdt_getprop(blob, off, "label", NULL);
748 * Could not find label property, nand {}; node?
749 * Check subnode, delete partitions there if any.
751 return fdt_del_partitions(blob, off);
753 ret = fdt_del_subnodes(blob, parent_offset);
755 printf("Can't remove subnodes: %s\n",
764 int fdt_node_set_part_info(void *blob, int parent_offset,
765 struct mtd_device *dev)
767 struct list_head *pentry;
768 struct part_info *part;
769 struct reg_cell cell;
770 int off = parent_offset, ndepth = 0;
774 ret = fdt_del_partitions(blob, parent_offset);
779 * Check if it is nand {}; subnode, adjust
780 * the offset in this case
782 while ((off = fdt_next_node(blob, off, &ndepth)) > 0) {
785 if (fdt_getprop(blob, off, "compatible", NULL))
791 list_for_each_prev(pentry, &dev->parts) {
794 part = list_entry(pentry, struct part_info, link);
796 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
797 part_num, part->name, part->size,
798 part->offset, part->mask_flags);
800 sprintf(buf, "partition@%llx", part->offset);
802 ret = fdt_add_subnode(blob, parent_offset, buf);
803 if (ret == -FDT_ERR_NOSPACE) {
804 ret = fdt_increase_size(blob, 512);
809 } else if (ret < 0) {
810 printf("Can't add partition node: %s\n",
816 /* Check MTD_WRITEABLE_CMD flag */
817 if (part->mask_flags & 1) {
819 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
820 if (ret == -FDT_ERR_NOSPACE) {
821 ret = fdt_increase_size(blob, 512);
830 cell.r0 = cpu_to_fdt32(part->offset);
831 cell.r1 = cpu_to_fdt32(part->size);
833 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
834 if (ret == -FDT_ERR_NOSPACE) {
835 ret = fdt_increase_size(blob, 512);
844 ret = fdt_setprop_string(blob, newoff, "label", part->name);
845 if (ret == -FDT_ERR_NOSPACE) {
846 ret = fdt_increase_size(blob, 512);
858 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
861 printf("Can't add property: %s\n", fdt_strerror(ret));
866 * Update partitions in nor/nand nodes using info from
867 * mtdparts environment variable. The nodes to update are
868 * specified by node_info structure which contains mtd device
869 * type and compatible string: E. g. the board code in
870 * ft_board_setup() could use:
872 * struct node_info nodes[] = {
873 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
874 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
877 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
879 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
881 struct node_info *ni = node_info;
882 struct mtd_device *dev;
887 parts = getenv("mtdparts");
891 if (mtdparts_init() != 0)
894 for (i = 0; i < node_info_size; i++) {
896 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
897 while (noff != -FDT_ERR_NOTFOUND) {
898 debug("%s: %s, mtd dev type %d\n",
899 fdt_get_name(blob, noff, 0),
900 ni[i].compat, ni[i].type);
901 dev = device_find(ni[i].type, idx++);
903 if (fdt_node_set_part_info(blob, noff, dev))
904 return; /* return on error */
907 /* Jump to next flash node */
908 noff = fdt_node_offset_by_compatible(blob, noff,
915 void fdt_del_node_and_alias(void *blob, const char *alias)
917 int off = fdt_path_offset(blob, alias);
922 fdt_del_node(blob, off);
924 off = fdt_path_offset(blob, "/aliases");
925 fdt_delprop(blob, off, alias);
928 /* Max address size we deal with */
929 #define OF_MAX_ADDR_CELLS 4
930 #define OF_BAD_ADDR ((u64)-1)
931 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
936 static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
940 printf(" %08x", *(addr++));
944 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
947 /* Callbacks for bus specific translators */
950 const char *addresses;
951 void (*count_cells)(void *blob, int parentoffset,
952 int *addrc, int *sizec);
953 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
954 int na, int ns, int pna);
955 int (*translate)(fdt32_t *addr, u64 offset, int na);
958 /* Default translator (generic bus) */
959 void of_bus_default_count_cells(void *blob, int parentoffset,
960 int *addrc, int *sizec)
965 *addrc = fdt_address_cells(blob, parentoffset);
968 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
970 *sizec = be32_to_cpup(prop);
976 static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
977 int na, int ns, int pna)
981 cp = of_read_number(range, na);
982 s = of_read_number(range + na + pna, ns);
983 da = of_read_number(addr, na);
985 debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64
986 ", da=%" PRIu64 "\n", cp, s, da);
988 if (da < cp || da >= (cp + s))
993 static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
995 u64 a = of_read_number(addr, na);
996 memset(addr, 0, na * 4);
999 addr[na - 2] = cpu_to_fdt32(a >> 32);
1000 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
1005 /* Array of bus specific translators */
1006 static struct of_bus of_busses[] = {
1011 .count_cells = of_bus_default_count_cells,
1012 .map = of_bus_default_map,
1013 .translate = of_bus_default_translate,
1017 static int of_translate_one(void * blob, int parent, struct of_bus *bus,
1018 struct of_bus *pbus, fdt32_t *addr,
1019 int na, int ns, int pna, const char *rprop)
1021 const fdt32_t *ranges;
1024 u64 offset = OF_BAD_ADDR;
1026 /* Normally, an absence of a "ranges" property means we are
1027 * crossing a non-translatable boundary, and thus the addresses
1028 * below the current not cannot be converted to CPU physical ones.
1029 * Unfortunately, while this is very clear in the spec, it's not
1030 * what Apple understood, and they do have things like /uni-n or
1031 * /ht nodes with no "ranges" property and a lot of perfectly
1032 * useable mapped devices below them. Thus we treat the absence of
1033 * "ranges" as equivalent to an empty "ranges" property which means
1034 * a 1:1 translation at that level. It's up to the caller not to try
1035 * to translate addresses that aren't supposed to be translated in
1036 * the first place. --BenH.
1038 ranges = fdt_getprop(blob, parent, rprop, &rlen);
1039 if (ranges == NULL || rlen == 0) {
1040 offset = of_read_number(addr, na);
1041 memset(addr, 0, pna * 4);
1042 debug("OF: no ranges, 1:1 translation\n");
1046 debug("OF: walking ranges...\n");
1048 /* Now walk through the ranges */
1050 rone = na + pna + ns;
1051 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1052 offset = bus->map(addr, ranges, na, ns, pna);
1053 if (offset != OF_BAD_ADDR)
1056 if (offset == OF_BAD_ADDR) {
1057 debug("OF: not found !\n");
1060 memcpy(addr, ranges + na, 4 * pna);
1063 of_dump_addr("OF: parent translation for:", addr, pna);
1064 debug("OF: with offset: %" PRIu64 "\n", offset);
1066 /* Translate it into parent bus space */
1067 return pbus->translate(addr, offset, pna);
1071 * Translate an address from the device-tree into a CPU physical address,
1072 * this walks up the tree and applies the various bus mappings on the
1075 * Note: We consider that crossing any level with #size-cells == 0 to mean
1076 * that translation is impossible (that is we are not dealing with a value
1077 * that can be mapped to a cpu physical address). This is not really specified
1078 * that way, but this is traditionally the way IBM at least do things
1080 static u64 __of_translate_address(void *blob, int node_offset, const fdt32_t *in_addr,
1084 struct of_bus *bus, *pbus;
1085 fdt32_t addr[OF_MAX_ADDR_CELLS];
1086 int na, ns, pna, pns;
1087 u64 result = OF_BAD_ADDR;
1089 debug("OF: ** translation for device %s **\n",
1090 fdt_get_name(blob, node_offset, NULL));
1092 /* Get parent & match bus type */
1093 parent = fdt_parent_offset(blob, node_offset);
1096 bus = &of_busses[0];
1098 /* Count address cells & copy address locally */
1099 bus->count_cells(blob, parent, &na, &ns);
1100 if (!OF_CHECK_COUNTS(na, ns)) {
1101 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1102 fdt_get_name(blob, node_offset, NULL));
1105 memcpy(addr, in_addr, na * 4);
1107 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1108 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1109 of_dump_addr("OF: translating address:", addr, na);
1113 /* Switch to parent bus */
1114 node_offset = parent;
1115 parent = fdt_parent_offset(blob, node_offset);
1117 /* If root, we have finished */
1119 debug("OF: reached root node\n");
1120 result = of_read_number(addr, na);
1124 /* Get new parent bus and counts */
1125 pbus = &of_busses[0];
1126 pbus->count_cells(blob, parent, &pna, &pns);
1127 if (!OF_CHECK_COUNTS(pna, pns)) {
1128 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1129 fdt_get_name(blob, node_offset, NULL));
1133 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1134 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1136 /* Apply bus translation */
1137 if (of_translate_one(blob, node_offset, bus, pbus,
1138 addr, na, ns, pna, rprop))
1141 /* Complete the move up one level */
1146 of_dump_addr("OF: one level translation:", addr, na);
1153 u64 fdt_translate_address(void *blob, int node_offset, const fdt32_t *in_addr)
1155 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1159 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1160 * who's reg property matches a physical cpu address
1162 * @blob: ptr to device tree
1163 * @compat: compatiable string to match
1164 * @compat_off: property name
1167 int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1168 phys_addr_t compat_off)
1170 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1171 while (off != -FDT_ERR_NOTFOUND) {
1172 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
1174 if (compat_off == fdt_translate_address(blob, off, reg))
1177 off = fdt_node_offset_by_compatible(blob, off, compat);
1180 return -FDT_ERR_NOTFOUND;
1184 * fdt_alloc_phandle: Return next free phandle value
1186 * @blob: ptr to device tree
1188 int fdt_alloc_phandle(void *blob)
1191 uint32_t phandle = 0;
1193 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1194 offset = fdt_next_node(blob, offset, NULL)) {
1195 phandle = max(phandle, fdt_get_phandle(blob, offset));
1202 * fdt_set_phandle: Create a phandle property for the given node
1204 * @fdt: ptr to device tree
1205 * @nodeoffset: node to update
1206 * @phandle: phandle value to set (must be unique)
1208 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
1213 int off = fdt_node_offset_by_phandle(fdt, phandle);
1215 if ((off >= 0) && (off != nodeoffset)) {
1218 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1219 printf("Trying to update node %s with phandle %u ",
1222 fdt_get_path(fdt, off, buf, sizeof(buf));
1223 printf("that already exists in node %s.\n", buf);
1224 return -FDT_ERR_BADPHANDLE;
1228 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1233 * For now, also set the deprecated "linux,phandle" property, so that we
1234 * don't break older kernels.
1236 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1242 * fdt_create_phandle: Create a phandle property for the given node
1244 * @fdt: ptr to device tree
1245 * @nodeoffset: node to update
1247 unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
1249 /* see if there is a phandle already */
1250 int phandle = fdt_get_phandle(fdt, nodeoffset);
1252 /* if we got 0, means no phandle so create one */
1256 phandle = fdt_alloc_phandle(fdt);
1257 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1259 printf("Can't set phandle %u: %s\n", phandle,
1269 * fdt_set_node_status: Set status for the given node
1271 * @fdt: ptr to device tree
1272 * @nodeoffset: node to update
1273 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1274 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1275 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1277 int fdt_set_node_status(void *fdt, int nodeoffset,
1278 enum fdt_status status, unsigned int error_code)
1287 case FDT_STATUS_OKAY:
1288 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1290 case FDT_STATUS_DISABLED:
1291 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1293 case FDT_STATUS_FAIL:
1294 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1296 case FDT_STATUS_FAIL_ERROR_CODE:
1297 sprintf(buf, "fail-%d", error_code);
1298 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1301 printf("Invalid fdt status: %x\n", status);
1310 * fdt_set_status_by_alias: Set status for the given node given an alias
1312 * @fdt: ptr to device tree
1313 * @alias: alias of node to update
1314 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1315 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1316 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1318 int fdt_set_status_by_alias(void *fdt, const char* alias,
1319 enum fdt_status status, unsigned int error_code)
1321 int offset = fdt_path_offset(fdt, alias);
1323 return fdt_set_node_status(fdt, offset, status, error_code);
1326 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
1327 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1332 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1333 if (noff != -FDT_ERR_NOTFOUND) {
1334 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1336 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1337 if (ret == -FDT_ERR_NOSPACE) {
1338 ret = fdt_increase_size(blob, 512);
1343 } else if (ret < 0) {
1344 printf("Can't add property: %s\n", fdt_strerror(ret));
1350 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1356 * Verify the physical address of device tree node for a given alias
1358 * This function locates the device tree node of a given alias, and then
1359 * verifies that the physical address of that device matches the given
1360 * parameter. It displays a message if there is a mismatch.
1362 * Returns 1 on success, 0 on failure
1364 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1371 path = fdt_getprop(fdt, anode, alias, NULL);
1373 /* If there's no such alias, then it's not a failure */
1377 node = fdt_path_offset(fdt, path);
1379 printf("Warning: device tree alias '%s' points to invalid "
1380 "node %s.\n", alias, path);
1384 reg = fdt_getprop(fdt, node, "reg", &len);
1386 printf("Warning: device tree node '%s' has no address.\n",
1391 dt_addr = fdt_translate_address(fdt, node, reg);
1392 if (addr != dt_addr) {
1393 printf("Warning: U-Boot configured device %s at address %"
1394 PRIx64 ",\n but the device tree has it address %"
1395 PRIx64 ".\n", alias, addr, dt_addr);
1403 * Returns the base address of an SOC or PCI node
1405 u64 fdt_get_base_address(void *fdt, int node)
1409 const fdt32_t *prop;
1411 naddr = fdt_address_cells(fdt, node);
1413 prop = fdt_getprop(fdt, node, "ranges", &size);
1415 return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0;
1419 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1421 static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1422 uint64_t *val, int cells)
1424 const fdt32_t *prop32 = &prop[cell_off];
1425 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];
1427 if ((cell_off + cells) > prop_len)
1428 return -FDT_ERR_NOSPACE;
1432 *val = fdt32_to_cpu(*prop32);
1435 *val = fdt64_to_cpu(*prop64);
1438 return -FDT_ERR_NOSPACE;
1445 * fdt_read_range - Read a node's n'th range property
1447 * @fdt: ptr to device tree
1448 * @node: offset of node
1450 * @child_addr: pointer to storage for the "child address" field
1451 * @addr: pointer to storage for the CPU view translated physical start
1452 * @len: pointer to storage for the range length
1454 * Convenience function that reads and interprets a specific range out of
1455 * a number of the "ranges" property array.
1457 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1458 uint64_t *addr, uint64_t *len)
1460 int pnode = fdt_parent_offset(fdt, node);
1461 const fdt32_t *ranges;
1470 * The "ranges" property is an array of
1471 * { <child address> <parent address> <size in child address space> }
1473 * All 3 elements can span a diffent number of cells. Fetch their size.
1475 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1476 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1477 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1479 /* Now try to get the ranges property */
1480 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1482 return -FDT_ERR_NOTFOUND;
1483 ranges_len /= sizeof(uint32_t);
1485 /* Jump to the n'th entry */
1486 cell = n * (pacells + acells + scells);
1488 /* Read <child address> */
1490 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1497 /* Read <parent address> */
1499 *addr = fdt_translate_address(fdt, node, ranges + cell);
1502 /* Read <size in child address space> */
1504 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
1513 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1515 * @fdt: ptr to device tree
1516 * @node: offset of the simplefb node
1517 * @base_address: framebuffer base address
1518 * @width: width in pixels
1519 * @height: height in pixels
1520 * @stride: bytes per line
1521 * @format: pixel format string
1523 * Convenience function to fill and enable a simplefb node.
1525 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
1526 u32 height, u32 stride, const char *format)
1530 int i, addrc, sizec, ret;
1532 of_bus_default_count_cells(fdt, fdt_parent_offset(fdt, node),
1536 cells[i++] = cpu_to_fdt32(base_address >> 32);
1537 cells[i++] = cpu_to_fdt32(base_address);
1540 cells[i++] = cpu_to_fdt32(height * stride);
1542 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
1546 snprintf(name, sizeof(name), "framebuffer@%llx", base_address);
1547 ret = fdt_set_name(fdt, node, name);
1551 ret = fdt_setprop_u32(fdt, node, "width", width);
1555 ret = fdt_setprop_u32(fdt, node, "height", height);
1559 ret = fdt_setprop_u32(fdt, node, "stride", stride);
1563 ret = fdt_setprop_string(fdt, node, "format", format);
1567 ret = fdt_setprop_string(fdt, node, "status", "okay");