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);
197 int fdt_root(void *fdt)
202 err = fdt_check_header(fdt);
204 printf("fdt_root: %s\n", fdt_strerror(err));
208 serial = getenv("serial#");
210 err = fdt_setprop(fdt, 0, "serial-number", serial,
214 printf("WARNING: could not set serial-number %s.\n",
223 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end)
230 /* just return if the size of initrd is zero */
231 if (initrd_start == initrd_end)
234 /* find or create "/chosen" node. */
235 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
239 total = fdt_num_mem_rsv(fdt);
242 * Look for an existing entry and update it. If we don't find
243 * the entry, we will j be the next available slot.
245 for (j = 0; j < total; j++) {
246 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
247 if (addr == initrd_start) {
248 fdt_del_mem_rsv(fdt, j);
253 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
255 printf("fdt_initrd: %s\n", fdt_strerror(err));
259 is_u64 = (fdt_address_cells(fdt, 0) == 2);
261 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start",
262 (uint64_t)initrd_start, is_u64);
265 printf("WARNING: could not set linux,initrd-start %s.\n",
270 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end",
271 (uint64_t)initrd_end, is_u64);
274 printf("WARNING: could not set linux,initrd-end %s.\n",
283 int fdt_chosen(void *fdt)
287 char *str; /* used to set string properties */
289 err = fdt_check_header(fdt);
291 printf("fdt_chosen: %s\n", fdt_strerror(err));
295 /* find or create "/chosen" node. */
296 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
300 str = getenv("bootargs");
302 err = fdt_setprop(fdt, nodeoffset, "bootargs", str,
305 printf("WARNING: could not set bootargs %s.\n",
311 return fdt_fixup_stdout(fdt, nodeoffset);
314 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
315 const void *val, int len, int create)
319 debug("Updating property '%s/%s' = ", path, prop);
320 for (i = 0; i < len; i++)
321 debug(" %.2x", *(u8*)(val+i));
324 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
326 printf("Unable to update property %s:%s, err=%s\n",
327 path, prop, fdt_strerror(rc));
330 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
333 fdt32_t tmp = cpu_to_fdt32(val);
334 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
337 void do_fixup_by_prop(void *fdt,
338 const char *pname, const void *pval, int plen,
339 const char *prop, const void *val, int len,
345 debug("Updating property '%s' = ", prop);
346 for (i = 0; i < len; i++)
347 debug(" %.2x", *(u8*)(val+i));
350 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
351 while (off != -FDT_ERR_NOTFOUND) {
352 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
353 fdt_setprop(fdt, off, prop, val, len);
354 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
358 void do_fixup_by_prop_u32(void *fdt,
359 const char *pname, const void *pval, int plen,
360 const char *prop, u32 val, int create)
362 fdt32_t tmp = cpu_to_fdt32(val);
363 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
366 void do_fixup_by_compat(void *fdt, const char *compat,
367 const char *prop, const void *val, int len, int create)
372 debug("Updating property '%s' = ", prop);
373 for (i = 0; i < len; i++)
374 debug(" %.2x", *(u8*)(val+i));
377 off = fdt_node_offset_by_compatible(fdt, -1, compat);
378 while (off != -FDT_ERR_NOTFOUND) {
379 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
380 fdt_setprop(fdt, off, prop, val, len);
381 off = fdt_node_offset_by_compatible(fdt, off, compat);
385 void do_fixup_by_compat_u32(void *fdt, const char *compat,
386 const char *prop, u32 val, int create)
388 fdt32_t tmp = cpu_to_fdt32(val);
389 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
393 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
395 static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size,
399 int address_cells = fdt_address_cells(fdt, 0);
400 int size_cells = fdt_size_cells(fdt, 0);
403 for (i = 0; i < n; i++) {
404 if (address_cells == 2)
405 *(fdt64_t *)p = cpu_to_fdt64(address[i]);
407 *(fdt32_t *)p = cpu_to_fdt32(address[i]);
408 p += 4 * address_cells;
411 *(fdt64_t *)p = cpu_to_fdt64(size[i]);
413 *(fdt32_t *)p = cpu_to_fdt32(size[i]);
417 return p - (char *)buf;
420 #ifdef CONFIG_NR_DRAM_BANKS
421 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
423 #define MEMORY_BANKS_MAX 4
425 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
429 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
431 if (banks > MEMORY_BANKS_MAX) {
432 printf("%s: num banks %d exceeds hardcoded limit %d."
433 " Recompile with higher MEMORY_BANKS_MAX?\n",
434 __FUNCTION__, banks, MEMORY_BANKS_MAX);
438 err = fdt_check_header(blob);
440 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
444 /* find or create "/memory" node. */
445 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
449 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
452 printf("WARNING: could not set %s %s.\n", "device_type",
457 len = fdt_pack_reg(blob, tmp, start, size, banks);
459 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
461 printf("WARNING: could not set %s %s.\n",
462 "reg", fdt_strerror(err));
468 int fdt_fixup_memory(void *blob, u64 start, u64 size)
470 return fdt_fixup_memory_banks(blob, &start, &size, 1);
473 void fdt_fixup_ethernet(void *fdt)
476 char enet[16], *tmp, *end;
479 unsigned char mac_addr[6];
481 node = fdt_path_offset(fdt, "/aliases");
485 if (!getenv("ethaddr")) {
486 if (getenv("usbethaddr")) {
487 strcpy(mac, "usbethaddr");
489 debug("No ethernet MAC Address defined\n");
493 strcpy(mac, "ethaddr");
497 while ((tmp = getenv(mac)) != NULL) {
498 sprintf(enet, "ethernet%d", i);
499 path = fdt_getprop(fdt, node, enet, NULL);
501 debug("No alias for %s\n", enet);
502 sprintf(mac, "eth%daddr", ++i);
506 for (j = 0; j < 6; j++) {
507 mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
509 tmp = (*end) ? end+1 : end;
512 do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0);
513 do_fixup_by_path(fdt, path, "local-mac-address",
516 sprintf(mac, "eth%daddr", ++i);
520 /* Resize the fdt to its actual size + a bit of padding */
521 int fdt_shrink_to_minimum(void *blob)
531 total = fdt_num_mem_rsv(blob);
532 for (i = 0; i < total; i++) {
533 fdt_get_mem_rsv(blob, i, &addr, &size);
534 if (addr == (uintptr_t)blob) {
535 fdt_del_mem_rsv(blob, i);
541 * Calculate the actual size of the fdt
542 * plus the size needed for 5 fdt_add_mem_rsv, one
543 * for the fdt itself and 4 for a possible initrd
544 * ((initrd-start + initrd-end) * 2 (name & value))
546 actualsize = fdt_off_dt_strings(blob) +
547 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
549 /* Make it so the fdt ends on a page boundary */
550 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
551 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
553 /* Change the fdt header to reflect the correct size */
554 fdt_set_totalsize(blob, actualsize);
556 /* Add the new reservation */
557 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize);
560 if (getenv("fdtsize"))
561 setenv_hex("fdtsize", actualsize);
566 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
568 #define FDT_PCI_PREFETCH (0x40000000)
569 #define FDT_PCI_MEM32 (0x02000000)
570 #define FDT_PCI_IO (0x01000000)
571 #define FDT_PCI_MEM64 (0x03000000)
573 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
575 int addrcell, sizecell, len, r;
577 /* sized based on pci addr cells, size-cells, & address-cells */
578 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
580 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
581 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
583 dma_range = &dma_ranges[0];
584 for (r = 0; r < hose->region_count; r++) {
585 u64 bus_start, phys_start, size;
587 /* skip if !PCI_REGION_SYS_MEMORY */
588 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
591 bus_start = (u64)hose->regions[r].bus_start;
592 phys_start = (u64)hose->regions[r].phys_start;
593 size = (u64)hose->regions[r].size;
596 if (size >= 0x100000000ull)
597 dma_range[0] |= FDT_PCI_MEM64;
599 dma_range[0] |= FDT_PCI_MEM32;
600 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
601 dma_range[0] |= FDT_PCI_PREFETCH;
602 #ifdef CONFIG_SYS_PCI_64BIT
603 dma_range[1] = bus_start >> 32;
607 dma_range[2] = bus_start & 0xffffffff;
610 dma_range[3] = phys_start >> 32;
611 dma_range[4] = phys_start & 0xffffffff;
613 dma_range[3] = phys_start & 0xffffffff;
617 dma_range[3 + addrcell + 0] = size >> 32;
618 dma_range[3 + addrcell + 1] = size & 0xffffffff;
620 dma_range[3 + addrcell + 0] = size & 0xffffffff;
623 dma_range += (3 + addrcell + sizecell);
626 len = dma_range - &dma_ranges[0];
628 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
634 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
636 * Provide a weak default function to return the flash bank size.
637 * There might be multiple non-identical flash chips connected to one
638 * chip-select, so we need to pass an index as well.
640 u32 __flash_get_bank_size(int cs, int idx)
642 extern flash_info_t flash_info[];
645 * As default, a simple 1:1 mapping is provided. Boards with
646 * a different mapping need to supply a board specific mapping
649 return flash_info[cs].size;
651 u32 flash_get_bank_size(int cs, int idx)
652 __attribute__((weak, alias("__flash_get_bank_size")));
655 * This function can be used to update the size in the "reg" property
656 * of all NOR FLASH device nodes. This is necessary for boards with
657 * non-fixed NOR FLASH sizes.
659 int fdt_fixup_nor_flash_size(void *blob)
661 char compat[][16] = { "cfi-flash", "jedec-flash" };
664 struct fdt_property *prop;
668 for (i = 0; i < 2; i++) {
669 off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
670 while (off != -FDT_ERR_NOTFOUND) {
674 * Found one compatible node, so fixup the size
675 * int its reg properties
677 prop = fdt_get_property_w(blob, off, "reg", &len);
679 int tuple_size = 3 * sizeof(reg);
682 * There might be multiple reg-tuples,
683 * so loop through them all
685 reg = reg2 = (u32 *)&prop->data[0];
686 for (idx = 0; idx < (len / tuple_size); idx++) {
688 * Update size in reg property
690 reg[2] = flash_get_bank_size(reg[0],
694 * Point to next reg tuple
699 fdt_setprop(blob, off, "reg", reg2, len);
702 /* Move to next compatible node */
703 off = fdt_node_offset_by_compatible(blob, off,
712 int fdt_increase_size(void *fdt, int add_len)
716 newlen = fdt_totalsize(fdt) + add_len;
718 /* Open in place with a new len */
719 return fdt_open_into(fdt, fdt, newlen);
722 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
723 #include <jffs2/load_kernel.h>
724 #include <mtd_node.h>
731 static int fdt_del_subnodes(const void *blob, int parent_offset)
736 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
737 (off >= 0) && (ndepth > 0);
738 off = fdt_next_node(blob, off, &ndepth)) {
741 else if (ndepth != 1)
743 else if (fdt_getprop(blob, off, "compatible", NULL))
745 debug("delete %s: offset: %x\n",
746 fdt_get_name(blob, off, 0), off);
747 ret = fdt_del_node((void *)blob, off);
749 printf("Can't delete node: %s\n",
760 int fdt_del_partitions(void *blob, int parent_offset)
764 int off = parent_offset;
767 while ((off = fdt_next_node(blob, off, &ndepth)) > 0) {
770 else if (ndepth != 1)
772 else if (fdt_getprop(blob, off, "compatible", NULL))
774 prop = fdt_getprop(blob, off, "label", NULL);
777 * Could not find label property, nand {}; node?
778 * Check subnode, delete partitions there if any.
780 return fdt_del_partitions(blob, off);
782 ret = fdt_del_subnodes(blob, parent_offset);
784 printf("Can't remove subnodes: %s\n",
793 int fdt_node_set_part_info(void *blob, int parent_offset,
794 struct mtd_device *dev)
796 struct list_head *pentry;
797 struct part_info *part;
798 struct reg_cell cell;
799 int off = parent_offset, ndepth = 0;
803 ret = fdt_del_partitions(blob, parent_offset);
808 * Check if it is nand {}; subnode, adjust
809 * the offset in this case
811 while ((off = fdt_next_node(blob, off, &ndepth)) > 0) {
814 else if (ndepth != 1)
816 else if (fdt_getprop(blob, off, "compatible", NULL))
822 list_for_each_prev(pentry, &dev->parts) {
825 part = list_entry(pentry, struct part_info, link);
827 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
828 part_num, part->name, part->size,
829 part->offset, part->mask_flags);
831 sprintf(buf, "partition@%llx", part->offset);
833 ret = fdt_add_subnode(blob, parent_offset, buf);
834 if (ret == -FDT_ERR_NOSPACE) {
835 ret = fdt_increase_size(blob, 512);
840 } else if (ret < 0) {
841 printf("Can't add partition node: %s\n",
847 /* Check MTD_WRITEABLE_CMD flag */
848 if (part->mask_flags & 1) {
850 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
851 if (ret == -FDT_ERR_NOSPACE) {
852 ret = fdt_increase_size(blob, 512);
861 cell.r0 = cpu_to_fdt32(part->offset);
862 cell.r1 = cpu_to_fdt32(part->size);
864 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
865 if (ret == -FDT_ERR_NOSPACE) {
866 ret = fdt_increase_size(blob, 512);
875 ret = fdt_setprop_string(blob, newoff, "label", part->name);
876 if (ret == -FDT_ERR_NOSPACE) {
877 ret = fdt_increase_size(blob, 512);
889 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
892 printf("Can't add property: %s\n", fdt_strerror(ret));
897 * Update partitions in nor/nand nodes using info from
898 * mtdparts environment variable. The nodes to update are
899 * specified by node_info structure which contains mtd device
900 * type and compatible string: E. g. the board code in
901 * ft_board_setup() could use:
903 * struct node_info nodes[] = {
904 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
905 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
908 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
910 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
912 struct node_info *ni = node_info;
913 struct mtd_device *dev;
918 parts = getenv("mtdparts");
922 if (mtdparts_init() != 0)
925 for (i = 0; i < node_info_size; i++) {
927 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
928 while (noff != -FDT_ERR_NOTFOUND) {
929 debug("%s: %s, mtd dev type %d\n",
930 fdt_get_name(blob, noff, 0),
931 ni[i].compat, ni[i].type);
932 dev = device_find(ni[i].type, idx++);
934 if (fdt_node_set_part_info(blob, noff, dev))
935 return; /* return on error */
938 /* Jump to next flash node */
939 noff = fdt_node_offset_by_compatible(blob, noff,
946 void fdt_del_node_and_alias(void *blob, const char *alias)
948 int off = fdt_path_offset(blob, alias);
953 fdt_del_node(blob, off);
955 off = fdt_path_offset(blob, "/aliases");
956 fdt_delprop(blob, off, alias);
959 /* Max address size we deal with */
960 #define OF_MAX_ADDR_CELLS 4
961 #define OF_BAD_ADDR ((u64)-1)
962 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
967 static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
971 printf(" %08x", *(addr++));
975 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
978 /* Callbacks for bus specific translators */
981 const char *addresses;
982 void (*count_cells)(void *blob, int parentoffset,
983 int *addrc, int *sizec);
984 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
985 int na, int ns, int pna);
986 int (*translate)(fdt32_t *addr, u64 offset, int na);
989 /* Default translator (generic bus) */
990 void of_bus_default_count_cells(void *blob, int parentoffset,
991 int *addrc, int *sizec)
996 *addrc = fdt_address_cells(blob, parentoffset);
999 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
1001 *sizec = be32_to_cpup(prop);
1007 static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
1008 int na, int ns, int pna)
1012 cp = of_read_number(range, na);
1013 s = of_read_number(range + na + pna, ns);
1014 da = of_read_number(addr, na);
1016 debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64
1017 ", da=%" PRIu64 "\n", cp, s, da);
1019 if (da < cp || da >= (cp + s))
1024 static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
1026 u64 a = of_read_number(addr, na);
1027 memset(addr, 0, na * 4);
1030 addr[na - 2] = cpu_to_fdt32(a >> 32);
1031 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
1036 /* Array of bus specific translators */
1037 static struct of_bus of_busses[] = {
1042 .count_cells = of_bus_default_count_cells,
1043 .map = of_bus_default_map,
1044 .translate = of_bus_default_translate,
1048 static int of_translate_one(void * blob, int parent, struct of_bus *bus,
1049 struct of_bus *pbus, fdt32_t *addr,
1050 int na, int ns, int pna, const char *rprop)
1052 const fdt32_t *ranges;
1055 u64 offset = OF_BAD_ADDR;
1057 /* Normally, an absence of a "ranges" property means we are
1058 * crossing a non-translatable boundary, and thus the addresses
1059 * below the current not cannot be converted to CPU physical ones.
1060 * Unfortunately, while this is very clear in the spec, it's not
1061 * what Apple understood, and they do have things like /uni-n or
1062 * /ht nodes with no "ranges" property and a lot of perfectly
1063 * useable mapped devices below them. Thus we treat the absence of
1064 * "ranges" as equivalent to an empty "ranges" property which means
1065 * a 1:1 translation at that level. It's up to the caller not to try
1066 * to translate addresses that aren't supposed to be translated in
1067 * the first place. --BenH.
1069 ranges = fdt_getprop(blob, parent, rprop, &rlen);
1070 if (ranges == NULL || rlen == 0) {
1071 offset = of_read_number(addr, na);
1072 memset(addr, 0, pna * 4);
1073 debug("OF: no ranges, 1:1 translation\n");
1077 debug("OF: walking ranges...\n");
1079 /* Now walk through the ranges */
1081 rone = na + pna + ns;
1082 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1083 offset = bus->map(addr, ranges, na, ns, pna);
1084 if (offset != OF_BAD_ADDR)
1087 if (offset == OF_BAD_ADDR) {
1088 debug("OF: not found !\n");
1091 memcpy(addr, ranges + na, 4 * pna);
1094 of_dump_addr("OF: parent translation for:", addr, pna);
1095 debug("OF: with offset: %" PRIu64 "\n", offset);
1097 /* Translate it into parent bus space */
1098 return pbus->translate(addr, offset, pna);
1102 * Translate an address from the device-tree into a CPU physical address,
1103 * this walks up the tree and applies the various bus mappings on the
1106 * Note: We consider that crossing any level with #size-cells == 0 to mean
1107 * that translation is impossible (that is we are not dealing with a value
1108 * that can be mapped to a cpu physical address). This is not really specified
1109 * that way, but this is traditionally the way IBM at least do things
1111 static u64 __of_translate_address(void *blob, int node_offset, const fdt32_t *in_addr,
1115 struct of_bus *bus, *pbus;
1116 fdt32_t addr[OF_MAX_ADDR_CELLS];
1117 int na, ns, pna, pns;
1118 u64 result = OF_BAD_ADDR;
1120 debug("OF: ** translation for device %s **\n",
1121 fdt_get_name(blob, node_offset, NULL));
1123 /* Get parent & match bus type */
1124 parent = fdt_parent_offset(blob, node_offset);
1127 bus = &of_busses[0];
1129 /* Count address cells & copy address locally */
1130 bus->count_cells(blob, parent, &na, &ns);
1131 if (!OF_CHECK_COUNTS(na, ns)) {
1132 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1133 fdt_get_name(blob, node_offset, NULL));
1136 memcpy(addr, in_addr, na * 4);
1138 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1139 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1140 of_dump_addr("OF: translating address:", addr, na);
1144 /* Switch to parent bus */
1145 node_offset = parent;
1146 parent = fdt_parent_offset(blob, node_offset);
1148 /* If root, we have finished */
1150 debug("OF: reached root node\n");
1151 result = of_read_number(addr, na);
1155 /* Get new parent bus and counts */
1156 pbus = &of_busses[0];
1157 pbus->count_cells(blob, parent, &pna, &pns);
1158 if (!OF_CHECK_COUNTS(pna, pns)) {
1159 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1160 fdt_get_name(blob, node_offset, NULL));
1164 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1165 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1167 /* Apply bus translation */
1168 if (of_translate_one(blob, node_offset, bus, pbus,
1169 addr, na, ns, pna, rprop))
1172 /* Complete the move up one level */
1177 of_dump_addr("OF: one level translation:", addr, na);
1184 u64 fdt_translate_address(void *blob, int node_offset, const fdt32_t *in_addr)
1186 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1190 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1191 * who's reg property matches a physical cpu address
1193 * @blob: ptr to device tree
1194 * @compat: compatiable string to match
1195 * @compat_off: property name
1198 int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1199 phys_addr_t compat_off)
1201 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1202 while (off != -FDT_ERR_NOTFOUND) {
1203 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
1205 if (compat_off == fdt_translate_address(blob, off, reg))
1208 off = fdt_node_offset_by_compatible(blob, off, compat);
1211 return -FDT_ERR_NOTFOUND;
1215 * fdt_alloc_phandle: Return next free phandle value
1217 * @blob: ptr to device tree
1219 int fdt_alloc_phandle(void *blob)
1222 uint32_t phandle = 0;
1224 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1225 offset = fdt_next_node(blob, offset, NULL)) {
1226 phandle = max(phandle, fdt_get_phandle(blob, offset));
1233 * fdt_set_phandle: Create a phandle property for the given node
1235 * @fdt: ptr to device tree
1236 * @nodeoffset: node to update
1237 * @phandle: phandle value to set (must be unique)
1239 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
1244 int off = fdt_node_offset_by_phandle(fdt, phandle);
1246 if ((off >= 0) && (off != nodeoffset)) {
1249 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1250 printf("Trying to update node %s with phandle %u ",
1253 fdt_get_path(fdt, off, buf, sizeof(buf));
1254 printf("that already exists in node %s.\n", buf);
1255 return -FDT_ERR_BADPHANDLE;
1259 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1264 * For now, also set the deprecated "linux,phandle" property, so that we
1265 * don't break older kernels.
1267 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1273 * fdt_create_phandle: Create a phandle property for the given node
1275 * @fdt: ptr to device tree
1276 * @nodeoffset: node to update
1278 unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
1280 /* see if there is a phandle already */
1281 int phandle = fdt_get_phandle(fdt, nodeoffset);
1283 /* if we got 0, means no phandle so create one */
1287 phandle = fdt_alloc_phandle(fdt);
1288 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1290 printf("Can't set phandle %u: %s\n", phandle,
1300 * fdt_set_node_status: Set status for the given node
1302 * @fdt: ptr to device tree
1303 * @nodeoffset: node to update
1304 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1305 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1306 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1308 int fdt_set_node_status(void *fdt, int nodeoffset,
1309 enum fdt_status status, unsigned int error_code)
1318 case FDT_STATUS_OKAY:
1319 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1321 case FDT_STATUS_DISABLED:
1322 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1324 case FDT_STATUS_FAIL:
1325 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1327 case FDT_STATUS_FAIL_ERROR_CODE:
1328 sprintf(buf, "fail-%d", error_code);
1329 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1332 printf("Invalid fdt status: %x\n", status);
1341 * fdt_set_status_by_alias: Set status for the given node given an alias
1343 * @fdt: ptr to device tree
1344 * @alias: alias of node to update
1345 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1346 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1347 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1349 int fdt_set_status_by_alias(void *fdt, const char* alias,
1350 enum fdt_status status, unsigned int error_code)
1352 int offset = fdt_path_offset(fdt, alias);
1354 return fdt_set_node_status(fdt, offset, status, error_code);
1357 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
1358 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1363 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1364 if (noff != -FDT_ERR_NOTFOUND) {
1365 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1367 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1368 if (ret == -FDT_ERR_NOSPACE) {
1369 ret = fdt_increase_size(blob, 512);
1374 } else if (ret < 0) {
1375 printf("Can't add property: %s\n", fdt_strerror(ret));
1381 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1387 * Verify the physical address of device tree node for a given alias
1389 * This function locates the device tree node of a given alias, and then
1390 * verifies that the physical address of that device matches the given
1391 * parameter. It displays a message if there is a mismatch.
1393 * Returns 1 on success, 0 on failure
1395 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1402 path = fdt_getprop(fdt, anode, alias, NULL);
1404 /* If there's no such alias, then it's not a failure */
1408 node = fdt_path_offset(fdt, path);
1410 printf("Warning: device tree alias '%s' points to invalid "
1411 "node %s.\n", alias, path);
1415 reg = fdt_getprop(fdt, node, "reg", &len);
1417 printf("Warning: device tree node '%s' has no address.\n",
1422 dt_addr = fdt_translate_address(fdt, node, reg);
1423 if (addr != dt_addr) {
1424 printf("Warning: U-Boot configured device %s at address %"
1425 PRIx64 ",\n but the device tree has it address %"
1426 PRIx64 ".\n", alias, addr, dt_addr);
1434 * Returns the base address of an SOC or PCI node
1436 u64 fdt_get_base_address(void *fdt, int node)
1440 const fdt32_t *prop;
1442 naddr = fdt_address_cells(fdt, node);
1444 prop = fdt_getprop(fdt, node, "ranges", &size);
1446 return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0;
1450 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1452 static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1453 uint64_t *val, int cells)
1455 const fdt32_t *prop32 = &prop[cell_off];
1456 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];
1458 if ((cell_off + cells) > prop_len)
1459 return -FDT_ERR_NOSPACE;
1463 *val = fdt32_to_cpu(*prop32);
1466 *val = fdt64_to_cpu(*prop64);
1469 return -FDT_ERR_NOSPACE;
1476 * fdt_read_range - Read a node's n'th range property
1478 * @fdt: ptr to device tree
1479 * @node: offset of node
1481 * @child_addr: pointer to storage for the "child address" field
1482 * @addr: pointer to storage for the CPU view translated physical start
1483 * @len: pointer to storage for the range length
1485 * Convenience function that reads and interprets a specific range out of
1486 * a number of the "ranges" property array.
1488 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1489 uint64_t *addr, uint64_t *len)
1491 int pnode = fdt_parent_offset(fdt, node);
1492 const fdt32_t *ranges;
1501 * The "ranges" property is an array of
1502 * { <child address> <parent address> <size in child address space> }
1504 * All 3 elements can span a diffent number of cells. Fetch their size.
1506 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1507 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1508 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1510 /* Now try to get the ranges property */
1511 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1513 return -FDT_ERR_NOTFOUND;
1514 ranges_len /= sizeof(uint32_t);
1516 /* Jump to the n'th entry */
1517 cell = n * (pacells + acells + scells);
1519 /* Read <child address> */
1521 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1528 /* Read <parent address> */
1530 *addr = fdt_translate_address(fdt, node, ranges + cell);
1533 /* Read <size in child address space> */
1535 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
1544 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1546 * @fdt: ptr to device tree
1547 * @node: offset of the simplefb node
1548 * @base_address: framebuffer base address
1549 * @width: width in pixels
1550 * @height: height in pixels
1551 * @stride: bytes per line
1552 * @format: pixel format string
1554 * Convenience function to fill and enable a simplefb node.
1556 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
1557 u32 height, u32 stride, const char *format)
1561 int i, addrc, sizec, ret;
1563 of_bus_default_count_cells(fdt, fdt_parent_offset(fdt, node),
1567 cells[i++] = cpu_to_fdt32(base_address >> 32);
1568 cells[i++] = cpu_to_fdt32(base_address);
1571 cells[i++] = cpu_to_fdt32(height * stride);
1573 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
1577 snprintf(name, sizeof(name), "framebuffer@%" PRIx64, base_address);
1578 ret = fdt_set_name(fdt, node, name);
1582 ret = fdt_setprop_u32(fdt, node, "width", width);
1586 ret = fdt_setprop_u32(fdt, node, "height", height);
1590 ret = fdt_setprop_u32(fdt, node, "stride", stride);
1594 ret = fdt_setprop_string(fdt, node, "format", format);
1598 ret = fdt_setprop_string(fdt, node, "status", "okay");
1606 * Update native-mode in display-timings from display environment variable.
1607 * The node to update are specified by path.
1609 int fdt_fixup_display(void *blob, const char *path, const char *display)
1613 if (!display || !path)
1614 return -FDT_ERR_NOTFOUND;
1616 toff = fdt_path_offset(blob, path);
1618 toff = fdt_subnode_offset(blob, toff, "display-timings");
1622 for (off = fdt_first_subnode(blob, toff);
1624 off = fdt_next_subnode(blob, off)) {
1625 uint32_t h = fdt_get_phandle(blob, off);
1626 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL),
1628 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0)
1629 return fdt_setprop_u32(blob, toff, "native-mode", h);