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",
460 len = fdt_pack_reg(blob, tmp, start, size, banks);
462 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
464 printf("WARNING: could not set %s %s.\n",
465 "reg", fdt_strerror(err));
471 int fdt_fixup_memory(void *blob, u64 start, u64 size)
473 return fdt_fixup_memory_banks(blob, &start, &size, 1);
476 void fdt_fixup_ethernet(void *fdt)
479 char enet[16], *tmp, *end;
482 unsigned char mac_addr[6];
484 node = fdt_path_offset(fdt, "/aliases");
488 if (!getenv("ethaddr")) {
489 if (getenv("usbethaddr")) {
490 strcpy(mac, "usbethaddr");
492 debug("No ethernet MAC Address defined\n");
496 strcpy(mac, "ethaddr");
500 while ((tmp = getenv(mac)) != NULL) {
501 sprintf(enet, "ethernet%d", i);
502 path = fdt_getprop(fdt, node, enet, NULL);
504 debug("No alias for %s\n", enet);
505 sprintf(mac, "eth%daddr", ++i);
509 for (j = 0; j < 6; j++) {
510 mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
512 tmp = (*end) ? end+1 : end;
515 do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0);
516 do_fixup_by_path(fdt, path, "local-mac-address",
519 sprintf(mac, "eth%daddr", ++i);
523 /* Resize the fdt to its actual size + a bit of padding */
524 int fdt_shrink_to_minimum(void *blob)
534 total = fdt_num_mem_rsv(blob);
535 for (i = 0; i < total; i++) {
536 fdt_get_mem_rsv(blob, i, &addr, &size);
537 if (addr == (uintptr_t)blob) {
538 fdt_del_mem_rsv(blob, i);
544 * Calculate the actual size of the fdt
545 * plus the size needed for 5 fdt_add_mem_rsv, one
546 * for the fdt itself and 4 for a possible initrd
547 * ((initrd-start + initrd-end) * 2 (name & value))
549 actualsize = fdt_off_dt_strings(blob) +
550 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
552 /* Make it so the fdt ends on a page boundary */
553 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
554 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
556 /* Change the fdt header to reflect the correct size */
557 fdt_set_totalsize(blob, actualsize);
559 /* Add the new reservation */
560 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize);
563 if (getenv("fdtsize"))
564 setenv_hex("fdtsize", actualsize);
569 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
571 #define FDT_PCI_PREFETCH (0x40000000)
572 #define FDT_PCI_MEM32 (0x02000000)
573 #define FDT_PCI_IO (0x01000000)
574 #define FDT_PCI_MEM64 (0x03000000)
576 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
578 int addrcell, sizecell, len, r;
580 /* sized based on pci addr cells, size-cells, & address-cells */
581 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
583 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
584 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
586 dma_range = &dma_ranges[0];
587 for (r = 0; r < hose->region_count; r++) {
588 u64 bus_start, phys_start, size;
590 /* skip if !PCI_REGION_SYS_MEMORY */
591 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
594 bus_start = (u64)hose->regions[r].bus_start;
595 phys_start = (u64)hose->regions[r].phys_start;
596 size = (u64)hose->regions[r].size;
599 if (size >= 0x100000000ull)
600 dma_range[0] |= FDT_PCI_MEM64;
602 dma_range[0] |= FDT_PCI_MEM32;
603 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
604 dma_range[0] |= FDT_PCI_PREFETCH;
605 #ifdef CONFIG_SYS_PCI_64BIT
606 dma_range[1] = bus_start >> 32;
610 dma_range[2] = bus_start & 0xffffffff;
613 dma_range[3] = phys_start >> 32;
614 dma_range[4] = phys_start & 0xffffffff;
616 dma_range[3] = phys_start & 0xffffffff;
620 dma_range[3 + addrcell + 0] = size >> 32;
621 dma_range[3 + addrcell + 1] = size & 0xffffffff;
623 dma_range[3 + addrcell + 0] = size & 0xffffffff;
626 dma_range += (3 + addrcell + sizecell);
629 len = dma_range - &dma_ranges[0];
631 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
637 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
639 * Provide a weak default function to return the flash bank size.
640 * There might be multiple non-identical flash chips connected to one
641 * chip-select, so we need to pass an index as well.
643 u32 __flash_get_bank_size(int cs, int idx)
645 extern flash_info_t flash_info[];
648 * As default, a simple 1:1 mapping is provided. Boards with
649 * a different mapping need to supply a board specific mapping
652 return flash_info[cs].size;
654 u32 flash_get_bank_size(int cs, int idx)
655 __attribute__((weak, alias("__flash_get_bank_size")));
658 * This function can be used to update the size in the "reg" property
659 * of all NOR FLASH device nodes. This is necessary for boards with
660 * non-fixed NOR FLASH sizes.
662 int fdt_fixup_nor_flash_size(void *blob)
664 char compat[][16] = { "cfi-flash", "jedec-flash" };
667 struct fdt_property *prop;
671 for (i = 0; i < 2; i++) {
672 off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
673 while (off != -FDT_ERR_NOTFOUND) {
677 * Found one compatible node, so fixup the size
678 * int its reg properties
680 prop = fdt_get_property_w(blob, off, "reg", &len);
682 int tuple_size = 3 * sizeof(reg);
685 * There might be multiple reg-tuples,
686 * so loop through them all
688 reg = reg2 = (u32 *)&prop->data[0];
689 for (idx = 0; idx < (len / tuple_size); idx++) {
691 * Update size in reg property
693 reg[2] = flash_get_bank_size(reg[0],
697 * Point to next reg tuple
702 fdt_setprop(blob, off, "reg", reg2, len);
705 /* Move to next compatible node */
706 off = fdt_node_offset_by_compatible(blob, off,
715 int fdt_increase_size(void *fdt, int add_len)
719 newlen = fdt_totalsize(fdt) + add_len;
721 /* Open in place with a new len */
722 return fdt_open_into(fdt, fdt, newlen);
725 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
726 #include <jffs2/load_kernel.h>
727 #include <mtd_node.h>
734 static int fdt_del_subnodes(const void *blob, int parent_offset)
739 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
740 (off >= 0) && (ndepth > 0);
741 off = fdt_next_node(blob, off, &ndepth)) {
744 else if (ndepth != 1)
746 else if (fdt_getprop(blob, off, "compatible", NULL))
748 debug("delete %s: offset: %x\n",
749 fdt_get_name(blob, off, 0), off);
750 ret = fdt_del_node((void *)blob, off);
752 printf("Can't delete node: %s\n",
763 int fdt_del_partitions(void *blob, int parent_offset)
767 int off = parent_offset;
770 while ((off = fdt_next_node(blob, off, &ndepth)) > 0) {
773 else if (ndepth != 1)
775 else if (fdt_getprop(blob, off, "compatible", NULL))
777 prop = fdt_getprop(blob, off, "label", NULL);
780 * Could not find label property, nand {}; node?
781 * Check subnode, delete partitions there if any.
783 return fdt_del_partitions(blob, off);
785 ret = fdt_del_subnodes(blob, parent_offset);
787 printf("Can't remove subnodes: %s\n",
796 int fdt_node_set_part_info(void *blob, int parent_offset,
797 struct mtd_device *dev)
799 struct list_head *pentry;
800 struct part_info *part;
801 struct reg_cell cell;
802 int off = parent_offset, ndepth = 0;
806 ret = fdt_del_partitions(blob, parent_offset);
811 * Check if it is nand {}; subnode, adjust
812 * the offset in this case
814 while ((off = fdt_next_node(blob, off, &ndepth)) > 0) {
817 else if (ndepth != 1)
819 else if (fdt_getprop(blob, off, "compatible", NULL))
825 list_for_each_prev(pentry, &dev->parts) {
828 part = list_entry(pentry, struct part_info, link);
830 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
831 part_num, part->name, part->size,
832 part->offset, part->mask_flags);
834 sprintf(buf, "partition@%llx", part->offset);
836 ret = fdt_add_subnode(blob, parent_offset, buf);
837 if (ret == -FDT_ERR_NOSPACE) {
838 ret = fdt_increase_size(blob, 512);
843 } else if (ret < 0) {
844 printf("Can't add partition node: %s\n",
850 /* Check MTD_WRITEABLE_CMD flag */
851 if (part->mask_flags & 1) {
853 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
854 if (ret == -FDT_ERR_NOSPACE) {
855 ret = fdt_increase_size(blob, 512);
864 cell.r0 = cpu_to_fdt32(part->offset);
865 cell.r1 = cpu_to_fdt32(part->size);
867 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
868 if (ret == -FDT_ERR_NOSPACE) {
869 ret = fdt_increase_size(blob, 512);
878 ret = fdt_setprop_string(blob, newoff, "label", part->name);
879 if (ret == -FDT_ERR_NOSPACE) {
880 ret = fdt_increase_size(blob, 512);
892 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
895 printf("Can't add property: %s\n", fdt_strerror(ret));
900 * Update partitions in nor/nand nodes using info from
901 * mtdparts environment variable. The nodes to update are
902 * specified by node_info structure which contains mtd device
903 * type and compatible string: E. g. the board code in
904 * ft_board_setup() could use:
906 * struct node_info nodes[] = {
907 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
908 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
911 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
913 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
915 struct node_info *ni = node_info;
916 struct mtd_device *dev;
921 parts = getenv("mtdparts");
925 if (mtdparts_init() != 0)
928 for (i = 0; i < node_info_size; i++) {
930 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
931 while (noff != -FDT_ERR_NOTFOUND) {
932 debug("%s: %s, mtd dev type %d\n",
933 fdt_get_name(blob, noff, 0),
934 ni[i].compat, ni[i].type);
935 dev = device_find(ni[i].type, idx++);
937 if (fdt_node_set_part_info(blob, noff, dev))
938 return; /* return on error */
941 /* Jump to next flash node */
942 noff = fdt_node_offset_by_compatible(blob, noff,
949 void fdt_del_node_and_alias(void *blob, const char *alias)
951 int off = fdt_path_offset(blob, alias);
956 fdt_del_node(blob, off);
958 off = fdt_path_offset(blob, "/aliases");
959 fdt_delprop(blob, off, alias);
962 /* Max address size we deal with */
963 #define OF_MAX_ADDR_CELLS 4
964 #define OF_BAD_ADDR ((u64)-1)
965 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
970 static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
974 printf(" %08x", *(addr++));
978 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
981 /* Callbacks for bus specific translators */
984 const char *addresses;
985 void (*count_cells)(void *blob, int parentoffset,
986 int *addrc, int *sizec);
987 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
988 int na, int ns, int pna);
989 int (*translate)(fdt32_t *addr, u64 offset, int na);
992 /* Default translator (generic bus) */
993 void of_bus_default_count_cells(void *blob, int parentoffset,
994 int *addrc, int *sizec)
999 *addrc = fdt_address_cells(blob, parentoffset);
1002 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
1004 *sizec = be32_to_cpup(prop);
1010 static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
1011 int na, int ns, int pna)
1015 cp = of_read_number(range, na);
1016 s = of_read_number(range + na + pna, ns);
1017 da = of_read_number(addr, na);
1019 debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64
1020 ", da=%" PRIu64 "\n", cp, s, da);
1022 if (da < cp || da >= (cp + s))
1027 static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
1029 u64 a = of_read_number(addr, na);
1030 memset(addr, 0, na * 4);
1033 addr[na - 2] = cpu_to_fdt32(a >> 32);
1034 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
1039 /* Array of bus specific translators */
1040 static struct of_bus of_busses[] = {
1045 .count_cells = of_bus_default_count_cells,
1046 .map = of_bus_default_map,
1047 .translate = of_bus_default_translate,
1051 static int of_translate_one(void * blob, int parent, struct of_bus *bus,
1052 struct of_bus *pbus, fdt32_t *addr,
1053 int na, int ns, int pna, const char *rprop)
1055 const fdt32_t *ranges;
1058 u64 offset = OF_BAD_ADDR;
1060 /* Normally, an absence of a "ranges" property means we are
1061 * crossing a non-translatable boundary, and thus the addresses
1062 * below the current not cannot be converted to CPU physical ones.
1063 * Unfortunately, while this is very clear in the spec, it's not
1064 * what Apple understood, and they do have things like /uni-n or
1065 * /ht nodes with no "ranges" property and a lot of perfectly
1066 * useable mapped devices below them. Thus we treat the absence of
1067 * "ranges" as equivalent to an empty "ranges" property which means
1068 * a 1:1 translation at that level. It's up to the caller not to try
1069 * to translate addresses that aren't supposed to be translated in
1070 * the first place. --BenH.
1072 ranges = fdt_getprop(blob, parent, rprop, &rlen);
1073 if (ranges == NULL || rlen == 0) {
1074 offset = of_read_number(addr, na);
1075 memset(addr, 0, pna * 4);
1076 debug("OF: no ranges, 1:1 translation\n");
1080 debug("OF: walking ranges...\n");
1082 /* Now walk through the ranges */
1084 rone = na + pna + ns;
1085 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1086 offset = bus->map(addr, ranges, na, ns, pna);
1087 if (offset != OF_BAD_ADDR)
1090 if (offset == OF_BAD_ADDR) {
1091 debug("OF: not found !\n");
1094 memcpy(addr, ranges + na, 4 * pna);
1097 of_dump_addr("OF: parent translation for:", addr, pna);
1098 debug("OF: with offset: %" PRIu64 "\n", offset);
1100 /* Translate it into parent bus space */
1101 return pbus->translate(addr, offset, pna);
1105 * Translate an address from the device-tree into a CPU physical address,
1106 * this walks up the tree and applies the various bus mappings on the
1109 * Note: We consider that crossing any level with #size-cells == 0 to mean
1110 * that translation is impossible (that is we are not dealing with a value
1111 * that can be mapped to a cpu physical address). This is not really specified
1112 * that way, but this is traditionally the way IBM at least do things
1114 static u64 __of_translate_address(void *blob, int node_offset, const fdt32_t *in_addr,
1118 struct of_bus *bus, *pbus;
1119 fdt32_t addr[OF_MAX_ADDR_CELLS];
1120 int na, ns, pna, pns;
1121 u64 result = OF_BAD_ADDR;
1123 debug("OF: ** translation for device %s **\n",
1124 fdt_get_name(blob, node_offset, NULL));
1126 /* Get parent & match bus type */
1127 parent = fdt_parent_offset(blob, node_offset);
1130 bus = &of_busses[0];
1132 /* Count address cells & copy address locally */
1133 bus->count_cells(blob, parent, &na, &ns);
1134 if (!OF_CHECK_COUNTS(na, ns)) {
1135 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1136 fdt_get_name(blob, node_offset, NULL));
1139 memcpy(addr, in_addr, na * 4);
1141 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1142 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1143 of_dump_addr("OF: translating address:", addr, na);
1147 /* Switch to parent bus */
1148 node_offset = parent;
1149 parent = fdt_parent_offset(blob, node_offset);
1151 /* If root, we have finished */
1153 debug("OF: reached root node\n");
1154 result = of_read_number(addr, na);
1158 /* Get new parent bus and counts */
1159 pbus = &of_busses[0];
1160 pbus->count_cells(blob, parent, &pna, &pns);
1161 if (!OF_CHECK_COUNTS(pna, pns)) {
1162 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1163 fdt_get_name(blob, node_offset, NULL));
1167 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1168 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1170 /* Apply bus translation */
1171 if (of_translate_one(blob, node_offset, bus, pbus,
1172 addr, na, ns, pna, rprop))
1175 /* Complete the move up one level */
1180 of_dump_addr("OF: one level translation:", addr, na);
1187 u64 fdt_translate_address(void *blob, int node_offset, const fdt32_t *in_addr)
1189 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1193 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1194 * who's reg property matches a physical cpu address
1196 * @blob: ptr to device tree
1197 * @compat: compatiable string to match
1198 * @compat_off: property name
1201 int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1202 phys_addr_t compat_off)
1204 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1205 while (off != -FDT_ERR_NOTFOUND) {
1206 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
1208 if (compat_off == fdt_translate_address(blob, off, reg))
1211 off = fdt_node_offset_by_compatible(blob, off, compat);
1214 return -FDT_ERR_NOTFOUND;
1218 * fdt_alloc_phandle: Return next free phandle value
1220 * @blob: ptr to device tree
1222 int fdt_alloc_phandle(void *blob)
1225 uint32_t phandle = 0;
1227 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1228 offset = fdt_next_node(blob, offset, NULL)) {
1229 phandle = max(phandle, fdt_get_phandle(blob, offset));
1236 * fdt_set_phandle: Create a phandle property for the given node
1238 * @fdt: ptr to device tree
1239 * @nodeoffset: node to update
1240 * @phandle: phandle value to set (must be unique)
1242 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
1247 int off = fdt_node_offset_by_phandle(fdt, phandle);
1249 if ((off >= 0) && (off != nodeoffset)) {
1252 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1253 printf("Trying to update node %s with phandle %u ",
1256 fdt_get_path(fdt, off, buf, sizeof(buf));
1257 printf("that already exists in node %s.\n", buf);
1258 return -FDT_ERR_BADPHANDLE;
1262 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1267 * For now, also set the deprecated "linux,phandle" property, so that we
1268 * don't break older kernels.
1270 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1276 * fdt_create_phandle: Create a phandle property for the given node
1278 * @fdt: ptr to device tree
1279 * @nodeoffset: node to update
1281 unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
1283 /* see if there is a phandle already */
1284 int phandle = fdt_get_phandle(fdt, nodeoffset);
1286 /* if we got 0, means no phandle so create one */
1290 phandle = fdt_alloc_phandle(fdt);
1291 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1293 printf("Can't set phandle %u: %s\n", phandle,
1303 * fdt_set_node_status: Set status for the given node
1305 * @fdt: ptr to device tree
1306 * @nodeoffset: node to update
1307 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1308 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1309 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1311 int fdt_set_node_status(void *fdt, int nodeoffset,
1312 enum fdt_status status, unsigned int error_code)
1321 case FDT_STATUS_OKAY:
1322 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1324 case FDT_STATUS_DISABLED:
1325 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1327 case FDT_STATUS_FAIL:
1328 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1330 case FDT_STATUS_FAIL_ERROR_CODE:
1331 sprintf(buf, "fail-%d", error_code);
1332 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1335 printf("Invalid fdt status: %x\n", status);
1344 * fdt_set_status_by_alias: Set status for the given node given an alias
1346 * @fdt: ptr to device tree
1347 * @alias: alias of node to update
1348 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1349 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1350 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1352 int fdt_set_status_by_alias(void *fdt, const char* alias,
1353 enum fdt_status status, unsigned int error_code)
1355 int offset = fdt_path_offset(fdt, alias);
1357 return fdt_set_node_status(fdt, offset, status, error_code);
1360 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
1361 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1366 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1367 if (noff != -FDT_ERR_NOTFOUND) {
1368 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1370 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1371 if (ret == -FDT_ERR_NOSPACE) {
1372 ret = fdt_increase_size(blob, 512);
1377 } else if (ret < 0) {
1378 printf("Can't add property: %s\n", fdt_strerror(ret));
1384 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1390 * Verify the physical address of device tree node for a given alias
1392 * This function locates the device tree node of a given alias, and then
1393 * verifies that the physical address of that device matches the given
1394 * parameter. It displays a message if there is a mismatch.
1396 * Returns 1 on success, 0 on failure
1398 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1405 path = fdt_getprop(fdt, anode, alias, NULL);
1407 /* If there's no such alias, then it's not a failure */
1411 node = fdt_path_offset(fdt, path);
1413 printf("Warning: device tree alias '%s' points to invalid "
1414 "node %s.\n", alias, path);
1418 reg = fdt_getprop(fdt, node, "reg", &len);
1420 printf("Warning: device tree node '%s' has no address.\n",
1425 dt_addr = fdt_translate_address(fdt, node, reg);
1426 if (addr != dt_addr) {
1427 printf("Warning: U-Boot configured device %s at address %"
1428 PRIx64 ",\n but the device tree has it address %"
1429 PRIx64 ".\n", alias, addr, dt_addr);
1437 * Returns the base address of an SOC or PCI node
1439 u64 fdt_get_base_address(void *fdt, int node)
1443 const fdt32_t *prop;
1445 naddr = fdt_address_cells(fdt, node);
1447 prop = fdt_getprop(fdt, node, "ranges", &size);
1449 return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0;
1453 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1455 static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1456 uint64_t *val, int cells)
1458 const fdt32_t *prop32 = &prop[cell_off];
1459 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];
1461 if ((cell_off + cells) > prop_len)
1462 return -FDT_ERR_NOSPACE;
1466 *val = fdt32_to_cpu(*prop32);
1469 *val = fdt64_to_cpu(*prop64);
1472 return -FDT_ERR_NOSPACE;
1479 * fdt_read_range - Read a node's n'th range property
1481 * @fdt: ptr to device tree
1482 * @node: offset of node
1484 * @child_addr: pointer to storage for the "child address" field
1485 * @addr: pointer to storage for the CPU view translated physical start
1486 * @len: pointer to storage for the range length
1488 * Convenience function that reads and interprets a specific range out of
1489 * a number of the "ranges" property array.
1491 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1492 uint64_t *addr, uint64_t *len)
1494 int pnode = fdt_parent_offset(fdt, node);
1495 const fdt32_t *ranges;
1504 * The "ranges" property is an array of
1505 * { <child address> <parent address> <size in child address space> }
1507 * All 3 elements can span a diffent number of cells. Fetch their size.
1509 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1510 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1511 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1513 /* Now try to get the ranges property */
1514 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1516 return -FDT_ERR_NOTFOUND;
1517 ranges_len /= sizeof(uint32_t);
1519 /* Jump to the n'th entry */
1520 cell = n * (pacells + acells + scells);
1522 /* Read <child address> */
1524 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1531 /* Read <parent address> */
1533 *addr = fdt_translate_address(fdt, node, ranges + cell);
1536 /* Read <size in child address space> */
1538 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
1547 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1549 * @fdt: ptr to device tree
1550 * @node: offset of the simplefb node
1551 * @base_address: framebuffer base address
1552 * @width: width in pixels
1553 * @height: height in pixels
1554 * @stride: bytes per line
1555 * @format: pixel format string
1557 * Convenience function to fill and enable a simplefb node.
1559 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
1560 u32 height, u32 stride, const char *format)
1564 int i, addrc, sizec, ret;
1566 of_bus_default_count_cells(fdt, fdt_parent_offset(fdt, node),
1570 cells[i++] = cpu_to_fdt32(base_address >> 32);
1571 cells[i++] = cpu_to_fdt32(base_address);
1574 cells[i++] = cpu_to_fdt32(height * stride);
1576 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
1580 snprintf(name, sizeof(name), "framebuffer@%" PRIx64, base_address);
1581 ret = fdt_set_name(fdt, node, name);
1585 ret = fdt_setprop_u32(fdt, node, "width", width);
1589 ret = fdt_setprop_u32(fdt, node, "height", height);
1593 ret = fdt_setprop_u32(fdt, node, "stride", stride);
1597 ret = fdt_setprop_string(fdt, node, "format", format);
1601 ret = fdt_setprop_string(fdt, node, "status", "okay");
1609 * Update native-mode in display-timings from display environment variable.
1610 * The node to update are specified by path.
1612 int fdt_fixup_display(void *blob, const char *path, const char *display)
1616 if (!display || !path)
1617 return -FDT_ERR_NOTFOUND;
1619 toff = fdt_path_offset(blob, path);
1621 toff = fdt_subnode_offset(blob, toff, "display-timings");
1625 for (off = fdt_first_subnode(blob, toff);
1627 off = fdt_next_subnode(blob, off)) {
1628 uint32_t h = fdt_get_phandle(blob, off);
1629 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL),
1631 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0)
1632 return fdt_setprop_u32(blob, toff, "native-mode", h);