3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
5 * Copyright 2010-2011 Freescale Semiconductor, Inc.
7 * See file CREDITS for list of people who contributed to this
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
27 #include <stdio_dev.h>
28 #include <linux/ctype.h>
29 #include <linux/types.h>
30 #include <asm/global_data.h>
33 #include <fdt_support.h>
37 * Global data (for the gd->bd)
39 DECLARE_GLOBAL_DATA_PTR;
42 * fdt_getprop_u32_default - Find a node and return it's property or a default
44 * @fdt: ptr to device tree
46 * @prop: property name
47 * @dflt: default value if the property isn't found
49 * Convenience function to find a node and return it's property or a
50 * default value if it doesn't exist.
52 u32 fdt_getprop_u32_default(const void *fdt, const char *path,
53 const char *prop, const u32 dflt)
58 off = fdt_path_offset(fdt, path);
62 val = fdt_getprop(fdt, off, prop, NULL);
64 return fdt32_to_cpu(*val);
70 * fdt_find_and_setprop: Find a node and set it's property
72 * @fdt: ptr to device tree
74 * @prop: property name
75 * @val: ptr to new value
76 * @len: length of new property value
77 * @create: flag to create the property if it doesn't exist
79 * Convenience function to directly set a property given the path to the node.
81 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
82 const void *val, int len, int create)
84 int nodeoff = fdt_path_offset(fdt, node);
89 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, 0) == NULL))
90 return 0; /* create flag not set; so exit quietly */
92 return fdt_setprop(fdt, nodeoff, prop, val, len);
95 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS
97 #ifdef CONFIG_CONS_INDEX
98 static void fdt_fill_multisername(char *sername, size_t maxlen)
100 const char *outname = stdio_devices[stdout]->name;
102 if (strcmp(outname, "serial") > 0)
103 strncpy(sername, outname, maxlen);
106 if (strcmp(outname + 1, "serial") > 0)
107 strncpy(sername, outname + 1, maxlen);
111 static int fdt_fixup_stdout(void *fdt, int chosenoff)
114 #ifdef CONFIG_CONS_INDEX
116 char sername[9] = { 0 };
119 fdt_fill_multisername(sername, sizeof(sername) - 1);
121 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
123 err = node = fdt_path_offset(fdt, "/aliases");
126 path = fdt_getprop(fdt, node, sername, &len);
128 char *p = malloc(len);
129 err = -FDT_ERR_NOSPACE;
131 memcpy(p, path, len);
132 err = fdt_setprop(fdt, chosenoff,
133 "linux,stdout-path", p, len);
142 printf("WARNING: could not set linux,stdout-path %s.\n",
149 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force)
157 /* Find the "chosen" node. */
158 nodeoffset = fdt_path_offset (fdt, "/chosen");
160 /* If there is no "chosen" node in the blob return */
161 if (nodeoffset < 0) {
162 printf("fdt_initrd: %s\n", fdt_strerror(nodeoffset));
166 /* just return if initrd_start/end aren't valid */
167 if ((initrd_start == 0) || (initrd_end == 0))
170 total = fdt_num_mem_rsv(fdt);
173 * Look for an existing entry and update it. If we don't find
174 * the entry, we will j be the next available slot.
176 for (j = 0; j < total; j++) {
177 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
178 if (addr == initrd_start) {
179 fdt_del_mem_rsv(fdt, j);
184 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
186 printf("fdt_initrd: %s\n", fdt_strerror(err));
190 path = fdt_getprop(fdt, nodeoffset, "linux,initrd-start", NULL);
191 if ((path == NULL) || force) {
192 tmp = __cpu_to_be32(initrd_start);
193 err = fdt_setprop(fdt, nodeoffset,
194 "linux,initrd-start", &tmp, sizeof(tmp));
197 "could not set linux,initrd-start %s.\n",
201 tmp = __cpu_to_be32(initrd_end);
202 err = fdt_setprop(fdt, nodeoffset,
203 "linux,initrd-end", &tmp, sizeof(tmp));
205 printf("WARNING: could not set linux,initrd-end %s.\n",
215 int fdt_chosen(void *fdt, int force)
219 char *str; /* used to set string properties */
222 err = fdt_check_header(fdt);
224 printf("fdt_chosen: %s\n", fdt_strerror(err));
229 * Find the "chosen" node.
231 nodeoffset = fdt_path_offset (fdt, "/chosen");
234 * If there is no "chosen" node in the blob, create it.
236 if (nodeoffset < 0) {
238 * Create a new node "/chosen" (offset 0 is root level)
240 nodeoffset = fdt_add_subnode(fdt, 0, "chosen");
241 if (nodeoffset < 0) {
242 printf("WARNING: could not create /chosen %s.\n",
243 fdt_strerror(nodeoffset));
249 * Create /chosen properites that don't exist in the fdt.
250 * If the property exists, update it only if the "force" parameter
253 str = getenv("bootargs");
255 path = fdt_getprop(fdt, nodeoffset, "bootargs", NULL);
256 if ((path == NULL) || force) {
257 err = fdt_setprop(fdt, nodeoffset,
258 "bootargs", str, strlen(str)+1);
260 printf("WARNING: could not set bootargs %s.\n",
265 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS
266 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
267 if ((path == NULL) || force)
268 err = fdt_fixup_stdout(fdt, nodeoffset);
271 #ifdef OF_STDOUT_PATH
272 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
273 if ((path == NULL) || force) {
274 err = fdt_setprop(fdt, nodeoffset,
275 "linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1);
277 printf("WARNING: could not set linux,stdout-path %s.\n",
285 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
286 const void *val, int len, int create)
290 debug("Updating property '%s/%s' = ", path, prop);
291 for (i = 0; i < len; i++)
292 debug(" %.2x", *(u8*)(val+i));
295 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
297 printf("Unable to update property %s:%s, err=%s\n",
298 path, prop, fdt_strerror(rc));
301 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
304 val = cpu_to_fdt32(val);
305 do_fixup_by_path(fdt, path, prop, &val, sizeof(val), create);
308 void do_fixup_by_prop(void *fdt,
309 const char *pname, const void *pval, int plen,
310 const char *prop, const void *val, int len,
316 debug("Updating property '%s' = ", prop);
317 for (i = 0; i < len; i++)
318 debug(" %.2x", *(u8*)(val+i));
321 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
322 while (off != -FDT_ERR_NOTFOUND) {
323 if (create || (fdt_get_property(fdt, off, prop, 0) != NULL))
324 fdt_setprop(fdt, off, prop, val, len);
325 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
329 void do_fixup_by_prop_u32(void *fdt,
330 const char *pname, const void *pval, int plen,
331 const char *prop, u32 val, int create)
333 val = cpu_to_fdt32(val);
334 do_fixup_by_prop(fdt, pname, pval, plen, prop, &val, 4, create);
337 void do_fixup_by_compat(void *fdt, const char *compat,
338 const char *prop, const void *val, int len, int create)
343 debug("Updating property '%s' = ", prop);
344 for (i = 0; i < len; i++)
345 debug(" %.2x", *(u8*)(val+i));
348 off = fdt_node_offset_by_compatible(fdt, -1, compat);
349 while (off != -FDT_ERR_NOTFOUND) {
350 if (create || (fdt_get_property(fdt, off, prop, 0) != NULL))
351 fdt_setprop(fdt, off, prop, val, len);
352 off = fdt_node_offset_by_compatible(fdt, off, compat);
356 void do_fixup_by_compat_u32(void *fdt, const char *compat,
357 const char *prop, u32 val, int create)
359 val = cpu_to_fdt32(val);
360 do_fixup_by_compat(fdt, compat, prop, &val, 4, create);
364 * Get cells len in bytes
365 * if #NNNN-cells property is 2 then len is 8
368 static int get_cells_len(void *blob, char *nr_cells_name)
372 cell = fdt_getprop(blob, 0, nr_cells_name, NULL);
373 if (cell && fdt32_to_cpu(*cell) == 2)
380 * Write a 4 or 8 byte big endian cell
382 static void write_cell(u8 *addr, u64 val, int size)
384 int shift = (size - 1) * 8;
386 *addr++ = (val >> shift) & 0xff;
391 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
394 int addr_cell_len, size_cell_len, len;
395 u8 tmp[banks * 16]; /* Up to 64-bit address + 64-bit size */
398 err = fdt_check_header(blob);
400 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
404 /* update, or add and update /memory node */
405 nodeoffset = fdt_path_offset(blob, "/memory");
406 if (nodeoffset < 0) {
407 nodeoffset = fdt_add_subnode(blob, 0, "memory");
409 printf("WARNING: could not create /memory: %s.\n",
410 fdt_strerror(nodeoffset));
413 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
416 printf("WARNING: could not set %s %s.\n", "device_type",
421 addr_cell_len = get_cells_len(blob, "#address-cells");
422 size_cell_len = get_cells_len(blob, "#size-cells");
424 for (bank = 0, len = 0; bank < banks; bank++) {
425 write_cell(tmp + len, start[bank], addr_cell_len);
426 len += addr_cell_len;
428 write_cell(tmp + len, size[bank], size_cell_len);
429 len += size_cell_len;
432 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
434 printf("WARNING: could not set %s %s.\n",
435 "reg", fdt_strerror(err));
441 int fdt_fixup_memory(void *blob, u64 start, u64 size)
443 return fdt_fixup_memory_banks(blob, &start, &size, 1);
446 void fdt_fixup_ethernet(void *fdt)
449 char enet[16], *tmp, *end;
450 char mac[16] = "ethaddr";
452 unsigned char mac_addr[6];
454 node = fdt_path_offset(fdt, "/aliases");
459 while ((tmp = getenv(mac)) != NULL) {
460 sprintf(enet, "ethernet%d", i);
461 path = fdt_getprop(fdt, node, enet, NULL);
463 debug("No alias for %s\n", enet);
464 sprintf(mac, "eth%daddr", ++i);
468 for (j = 0; j < 6; j++) {
469 mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
471 tmp = (*end) ? end+1 : end;
474 do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0);
475 do_fixup_by_path(fdt, path, "local-mac-address",
478 sprintf(mac, "eth%daddr", ++i);
482 /* Resize the fdt to its actual size + a bit of padding */
483 int fdt_resize(void *blob)
493 total = fdt_num_mem_rsv(blob);
494 for (i = 0; i < total; i++) {
495 fdt_get_mem_rsv(blob, i, &addr, &size);
496 if (addr == (uintptr_t)blob) {
497 fdt_del_mem_rsv(blob, i);
503 * Calculate the actual size of the fdt
504 * plus the size needed for 5 fdt_add_mem_rsv, one
505 * for the fdt itself and 4 for a possible initrd
506 * ((initrd-start + initrd-end) * 2 (name & value))
508 actualsize = fdt_off_dt_strings(blob) +
509 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
511 /* Make it so the fdt ends on a page boundary */
512 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
513 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
515 /* Change the fdt header to reflect the correct size */
516 fdt_set_totalsize(blob, actualsize);
518 /* Add the new reservation */
519 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize);
527 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
529 #define FDT_PCI_PREFETCH (0x40000000)
530 #define FDT_PCI_MEM32 (0x02000000)
531 #define FDT_PCI_IO (0x01000000)
532 #define FDT_PCI_MEM64 (0x03000000)
534 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
536 int addrcell, sizecell, len, r;
538 /* sized based on pci addr cells, size-cells, & address-cells */
539 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
541 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
542 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
544 dma_range = &dma_ranges[0];
545 for (r = 0; r < hose->region_count; r++) {
546 u64 bus_start, phys_start, size;
548 /* skip if !PCI_REGION_SYS_MEMORY */
549 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
552 bus_start = (u64)hose->regions[r].bus_start;
553 phys_start = (u64)hose->regions[r].phys_start;
554 size = (u64)hose->regions[r].size;
557 if (size >= 0x100000000ull)
558 dma_range[0] |= FDT_PCI_MEM64;
560 dma_range[0] |= FDT_PCI_MEM32;
561 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
562 dma_range[0] |= FDT_PCI_PREFETCH;
563 #ifdef CONFIG_SYS_PCI_64BIT
564 dma_range[1] = bus_start >> 32;
568 dma_range[2] = bus_start & 0xffffffff;
571 dma_range[3] = phys_start >> 32;
572 dma_range[4] = phys_start & 0xffffffff;
574 dma_range[3] = phys_start & 0xffffffff;
578 dma_range[3 + addrcell + 0] = size >> 32;
579 dma_range[3 + addrcell + 1] = size & 0xffffffff;
581 dma_range[3 + addrcell + 0] = size & 0xffffffff;
584 dma_range += (3 + addrcell + sizecell);
587 len = dma_range - &dma_ranges[0];
589 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
595 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
597 * Provide a weak default function to return the flash bank size.
598 * There might be multiple non-identical flash chips connected to one
599 * chip-select, so we need to pass an index as well.
601 u32 __flash_get_bank_size(int cs, int idx)
603 extern flash_info_t flash_info[];
606 * As default, a simple 1:1 mapping is provided. Boards with
607 * a different mapping need to supply a board specific mapping
610 return flash_info[cs].size;
612 u32 flash_get_bank_size(int cs, int idx)
613 __attribute__((weak, alias("__flash_get_bank_size")));
616 * This function can be used to update the size in the "reg" property
617 * of all NOR FLASH device nodes. This is necessary for boards with
618 * non-fixed NOR FLASH sizes.
620 int fdt_fixup_nor_flash_size(void *blob)
622 char compat[][16] = { "cfi-flash", "jedec-flash" };
625 struct fdt_property *prop;
629 for (i = 0; i < 2; i++) {
630 off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
631 while (off != -FDT_ERR_NOTFOUND) {
635 * Found one compatible node, so fixup the size
636 * int its reg properties
638 prop = fdt_get_property_w(blob, off, "reg", &len);
640 int tuple_size = 3 * sizeof(reg);
643 * There might be multiple reg-tuples,
644 * so loop through them all
646 reg = reg2 = (u32 *)&prop->data[0];
647 for (idx = 0; idx < (len / tuple_size); idx++) {
649 * Update size in reg property
651 reg[2] = flash_get_bank_size(reg[0],
655 * Point to next reg tuple
660 fdt_setprop(blob, off, "reg", reg2, len);
663 /* Move to next compatible node */
664 off = fdt_node_offset_by_compatible(blob, off,
673 int fdt_increase_size(void *fdt, int add_len)
677 newlen = fdt_totalsize(fdt) + add_len;
679 /* Open in place with a new len */
680 return fdt_open_into(fdt, fdt, newlen);
683 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
684 #include <jffs2/load_kernel.h>
685 #include <mtd_node.h>
692 int fdt_del_subnodes(const void *blob, int parent_offset)
697 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
698 (off >= 0) && (ndepth > 0);
699 off = fdt_next_node(blob, off, &ndepth)) {
701 debug("delete %s: offset: %x\n",
702 fdt_get_name(blob, off, 0), off);
703 ret = fdt_del_node((void *)blob, off);
705 printf("Can't delete node: %s\n",
717 int fdt_del_partitions(void *blob, int parent_offset)
724 off = fdt_next_node(blob, parent_offset, &ndepth);
725 if (off > 0 && ndepth == 1) {
726 prop = fdt_getprop(blob, off, "label", NULL);
729 * Could not find label property, nand {}; node?
730 * Check subnode, delete partitions there if any.
732 return fdt_del_partitions(blob, off);
734 ret = fdt_del_subnodes(blob, parent_offset);
736 printf("Can't remove subnodes: %s\n",
745 int fdt_node_set_part_info(void *blob, int parent_offset,
746 struct mtd_device *dev)
748 struct list_head *pentry;
749 struct part_info *part;
750 struct reg_cell cell;
755 ret = fdt_del_partitions(blob, parent_offset);
760 * Check if it is nand {}; subnode, adjust
761 * the offset in this case
763 off = fdt_next_node(blob, parent_offset, &ndepth);
764 if (off > 0 && ndepth == 1)
768 list_for_each_prev(pentry, &dev->parts) {
771 part = list_entry(pentry, struct part_info, link);
773 debug("%2d: %-20s0x%08x\t0x%08x\t%d\n",
774 part_num, part->name, part->size,
775 part->offset, part->mask_flags);
777 sprintf(buf, "partition@%x", part->offset);
779 ret = fdt_add_subnode(blob, parent_offset, buf);
780 if (ret == -FDT_ERR_NOSPACE) {
781 ret = fdt_increase_size(blob, 512);
786 } else if (ret < 0) {
787 printf("Can't add partition node: %s\n",
793 /* Check MTD_WRITEABLE_CMD flag */
794 if (part->mask_flags & 1) {
796 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
797 if (ret == -FDT_ERR_NOSPACE) {
798 ret = fdt_increase_size(blob, 512);
807 cell.r0 = cpu_to_fdt32(part->offset);
808 cell.r1 = cpu_to_fdt32(part->size);
810 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
811 if (ret == -FDT_ERR_NOSPACE) {
812 ret = fdt_increase_size(blob, 512);
821 ret = fdt_setprop_string(blob, newoff, "label", part->name);
822 if (ret == -FDT_ERR_NOSPACE) {
823 ret = fdt_increase_size(blob, 512);
835 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
838 printf("Can't add property: %s\n", fdt_strerror(ret));
843 * Update partitions in nor/nand nodes using info from
844 * mtdparts environment variable. The nodes to update are
845 * specified by node_info structure which contains mtd device
846 * type and compatible string: E. g. the board code in
847 * ft_board_setup() could use:
849 * struct node_info nodes[] = {
850 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
851 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
854 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
856 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
858 struct node_info *ni = node_info;
859 struct mtd_device *dev;
864 parts = getenv("mtdparts");
868 if (mtdparts_init() != 0)
871 for (i = 0; i < node_info_size; i++) {
873 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
874 while (noff != -FDT_ERR_NOTFOUND) {
875 debug("%s: %s, mtd dev type %d\n",
876 fdt_get_name(blob, noff, 0),
877 ni[i].compat, ni[i].type);
878 dev = device_find(ni[i].type, idx++);
880 if (fdt_node_set_part_info(blob, noff, dev))
881 return; /* return on error */
884 /* Jump to next flash node */
885 noff = fdt_node_offset_by_compatible(blob, noff,
892 void fdt_del_node_and_alias(void *blob, const char *alias)
894 int off = fdt_path_offset(blob, alias);
899 fdt_del_node(blob, off);
901 off = fdt_path_offset(blob, "/aliases");
902 fdt_delprop(blob, off, alias);
905 /* Helper to read a big number; size is in cells (not bytes) */
906 static inline u64 of_read_number(const __be32 *cell, int size)
910 r = (r << 32) | be32_to_cpu(*(cell++));
916 /* Max address size we deal with */
917 #define OF_MAX_ADDR_CELLS 4
918 #define OF_BAD_ADDR ((u64)-1)
919 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
924 static void of_dump_addr(const char *s, const u32 *addr, int na)
928 printf(" %08x", *(addr++));
932 static void of_dump_addr(const char *s, const u32 *addr, int na) { }
935 /* Callbacks for bus specific translators */
938 const char *addresses;
939 void (*count_cells)(void *blob, int parentoffset,
940 int *addrc, int *sizec);
941 u64 (*map)(u32 *addr, const u32 *range,
942 int na, int ns, int pna);
943 int (*translate)(u32 *addr, u64 offset, int na);
946 /* Default translator (generic bus) */
947 static void of_bus_default_count_cells(void *blob, int parentoffset,
948 int *addrc, int *sizec)
953 prop = fdt_getprop(blob, parentoffset, "#address-cells", NULL);
955 *addrc = be32_to_cpup((u32 *)prop);
961 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
963 *sizec = be32_to_cpup((u32 *)prop);
969 static u64 of_bus_default_map(u32 *addr, const u32 *range,
970 int na, int ns, int pna)
974 cp = of_read_number(range, na);
975 s = of_read_number(range + na + pna, ns);
976 da = of_read_number(addr, na);
978 debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n",
981 if (da < cp || da >= (cp + s))
986 static int of_bus_default_translate(u32 *addr, u64 offset, int na)
988 u64 a = of_read_number(addr, na);
989 memset(addr, 0, na * 4);
992 addr[na - 2] = a >> 32;
993 addr[na - 1] = a & 0xffffffffu;
998 /* Array of bus specific translators */
999 static struct of_bus of_busses[] = {
1004 .count_cells = of_bus_default_count_cells,
1005 .map = of_bus_default_map,
1006 .translate = of_bus_default_translate,
1010 static int of_translate_one(void * blob, int parent, struct of_bus *bus,
1011 struct of_bus *pbus, u32 *addr,
1012 int na, int ns, int pna, const char *rprop)
1017 u64 offset = OF_BAD_ADDR;
1019 /* Normally, an absence of a "ranges" property means we are
1020 * crossing a non-translatable boundary, and thus the addresses
1021 * below the current not cannot be converted to CPU physical ones.
1022 * Unfortunately, while this is very clear in the spec, it's not
1023 * what Apple understood, and they do have things like /uni-n or
1024 * /ht nodes with no "ranges" property and a lot of perfectly
1025 * useable mapped devices below them. Thus we treat the absence of
1026 * "ranges" as equivalent to an empty "ranges" property which means
1027 * a 1:1 translation at that level. It's up to the caller not to try
1028 * to translate addresses that aren't supposed to be translated in
1029 * the first place. --BenH.
1031 ranges = (u32 *)fdt_getprop(blob, parent, rprop, &rlen);
1032 if (ranges == NULL || rlen == 0) {
1033 offset = of_read_number(addr, na);
1034 memset(addr, 0, pna * 4);
1035 debug("OF: no ranges, 1:1 translation\n");
1039 debug("OF: walking ranges...\n");
1041 /* Now walk through the ranges */
1043 rone = na + pna + ns;
1044 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1045 offset = bus->map(addr, ranges, na, ns, pna);
1046 if (offset != OF_BAD_ADDR)
1049 if (offset == OF_BAD_ADDR) {
1050 debug("OF: not found !\n");
1053 memcpy(addr, ranges + na, 4 * pna);
1056 of_dump_addr("OF: parent translation for:", addr, pna);
1057 debug("OF: with offset: "PRu64"\n", offset);
1059 /* Translate it into parent bus space */
1060 return pbus->translate(addr, offset, pna);
1064 * Translate an address from the device-tree into a CPU physical address,
1065 * this walks up the tree and applies the various bus mappings on the
1068 * Note: We consider that crossing any level with #size-cells == 0 to mean
1069 * that translation is impossible (that is we are not dealing with a value
1070 * that can be mapped to a cpu physical address). This is not really specified
1071 * that way, but this is traditionally the way IBM at least do things
1073 u64 __of_translate_address(void *blob, int node_offset, const u32 *in_addr,
1077 struct of_bus *bus, *pbus;
1078 u32 addr[OF_MAX_ADDR_CELLS];
1079 int na, ns, pna, pns;
1080 u64 result = OF_BAD_ADDR;
1082 debug("OF: ** translation for device %s **\n",
1083 fdt_get_name(blob, node_offset, NULL));
1085 /* Get parent & match bus type */
1086 parent = fdt_parent_offset(blob, node_offset);
1089 bus = &of_busses[0];
1091 /* Cound address cells & copy address locally */
1092 bus->count_cells(blob, parent, &na, &ns);
1093 if (!OF_CHECK_COUNTS(na, ns)) {
1094 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1095 fdt_get_name(blob, node_offset, NULL));
1098 memcpy(addr, in_addr, na * 4);
1100 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1101 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1102 of_dump_addr("OF: translating address:", addr, na);
1106 /* Switch to parent bus */
1107 node_offset = parent;
1108 parent = fdt_parent_offset(blob, node_offset);
1110 /* If root, we have finished */
1112 debug("OF: reached root node\n");
1113 result = of_read_number(addr, na);
1117 /* Get new parent bus and counts */
1118 pbus = &of_busses[0];
1119 pbus->count_cells(blob, parent, &pna, &pns);
1120 if (!OF_CHECK_COUNTS(pna, pns)) {
1121 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1122 fdt_get_name(blob, node_offset, NULL));
1126 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1127 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1129 /* Apply bus translation */
1130 if (of_translate_one(blob, node_offset, bus, pbus,
1131 addr, na, ns, pna, rprop))
1134 /* Complete the move up one level */
1139 of_dump_addr("OF: one level translation:", addr, na);
1146 u64 fdt_translate_address(void *blob, int node_offset, const u32 *in_addr)
1148 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1152 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1153 * who's reg property matches a physical cpu address
1155 * @blob: ptr to device tree
1156 * @compat: compatiable string to match
1157 * @compat_off: property name
1160 int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1161 phys_addr_t compat_off)
1163 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1164 while (off != -FDT_ERR_NOTFOUND) {
1165 u32 *reg = (u32 *)fdt_getprop(blob, off, "reg", &len);
1167 if (compat_off == fdt_translate_address(blob, off, reg))
1170 off = fdt_node_offset_by_compatible(blob, off, compat);
1173 return -FDT_ERR_NOTFOUND;
1177 * fdt_alloc_phandle: Return next free phandle value
1179 * @blob: ptr to device tree
1181 int fdt_alloc_phandle(void *blob)
1183 int offset, phandle = 0;
1185 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1186 offset = fdt_next_node(blob, offset, NULL)) {
1187 phandle = max(phandle, fdt_get_phandle(blob, offset));
1194 * fdt_set_phandle: Create a phandle property for the given node
1196 * @fdt: ptr to device tree
1197 * @nodeoffset: node to update
1198 * @phandle: phandle value to set (must be unique)
1200 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
1205 int off = fdt_node_offset_by_phandle(fdt, phandle);
1207 if ((off >= 0) && (off != nodeoffset)) {
1210 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1211 printf("Trying to update node %s with phandle %u ",
1214 fdt_get_path(fdt, off, buf, sizeof(buf));
1215 printf("that already exists in node %s.\n", buf);
1216 return -FDT_ERR_BADPHANDLE;
1220 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1225 * For now, also set the deprecated "linux,phandle" property, so that we
1226 * don't break older kernels.
1228 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1234 * fdt_create_phandle: Create a phandle property for the given node
1236 * @fdt: ptr to device tree
1237 * @nodeoffset: node to update
1239 unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
1241 /* see if there is a phandle already */
1242 int phandle = fdt_get_phandle(fdt, nodeoffset);
1244 /* if we got 0, means no phandle so create one */
1248 phandle = fdt_alloc_phandle(fdt);
1249 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1251 printf("Can't set phandle %u: %s\n", phandle,
1261 * fdt_set_node_status: Set status for the given node
1263 * @fdt: ptr to device tree
1264 * @nodeoffset: node to update
1265 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1266 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1267 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1269 int fdt_set_node_status(void *fdt, int nodeoffset,
1270 enum fdt_status status, unsigned int error_code)
1279 case FDT_STATUS_OKAY:
1280 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1282 case FDT_STATUS_DISABLED:
1283 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1285 case FDT_STATUS_FAIL:
1286 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1288 case FDT_STATUS_FAIL_ERROR_CODE:
1289 sprintf(buf, "fail-%d", error_code);
1290 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1293 printf("Invalid fdt status: %x\n", status);
1302 * fdt_set_status_by_alias: Set status for the given node given an alias
1304 * @fdt: ptr to device tree
1305 * @alias: alias of node to update
1306 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1307 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1308 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1310 int fdt_set_status_by_alias(void *fdt, const char* alias,
1311 enum fdt_status status, unsigned int error_code)
1313 int offset = fdt_path_offset(fdt, alias);
1315 return fdt_set_node_status(fdt, offset, status, error_code);
1318 #if defined(CONFIG_VIDEO)
1319 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1324 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1325 if (noff != -FDT_ERR_NOTFOUND) {
1326 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1328 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1329 if (ret == -FDT_ERR_NOSPACE) {
1330 ret = fdt_increase_size(blob, 512);
1335 } else if (ret < 0) {
1336 printf("Can't add property: %s\n", fdt_strerror(ret));
1342 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1348 * Verify the physical address of device tree node for a given alias
1350 * This function locates the device tree node of a given alias, and then
1351 * verifies that the physical address of that device matches the given
1352 * parameter. It displays a message if there is a mismatch.
1354 * Returns 1 on success, 0 on failure
1356 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1363 path = fdt_getprop(fdt, anode, alias, NULL);
1365 /* If there's no such alias, then it's not a failure */
1369 node = fdt_path_offset(fdt, path);
1371 printf("Warning: device tree alias '%s' points to invalid "
1372 "node %s.\n", alias, path);
1376 reg = fdt_getprop(fdt, node, "reg", &len);
1378 printf("Warning: device tree node '%s' has no address.\n",
1383 dt_addr = fdt_translate_address(fdt, node, reg);
1384 if (addr != dt_addr) {
1385 printf("Warning: U-Boot configured device %s at address %llx,\n"
1386 " but the device tree has it address %llx.\n",
1387 alias, addr, dt_addr);
1395 * Returns the base address of an SOC or PCI node
1397 u64 fdt_get_base_address(void *fdt, int node)
1403 prop = fdt_getprop(fdt, node, "#address-cells", &size);
1404 if (prop && size == 4)
1409 prop = fdt_getprop(fdt, node, "ranges", &size);
1411 return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0;