3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
5 * Copyright 2010-2011 Freescale Semiconductor, Inc.
7 * SPDX-License-Identifier: GPL-2.0+
11 #include <stdio_dev.h>
12 #include <linux/ctype.h>
13 #include <linux/types.h>
14 #include <asm/global_data.h>
16 #include <fdt_support.h>
20 * Global data (for the gd->bd)
22 DECLARE_GLOBAL_DATA_PTR;
25 * Get cells len in bytes
26 * if #NNNN-cells property is 2 then len is 8
29 static int get_cells_len(void *blob, char *nr_cells_name)
33 cell = fdt_getprop(blob, 0, nr_cells_name, NULL);
34 if (cell && fdt32_to_cpu(*cell) == 2)
41 * Write a 4 or 8 byte big endian cell
43 static void write_cell(u8 *addr, u64 val, int size)
45 int shift = (size - 1) * 8;
47 *addr++ = (val >> shift) & 0xff;
53 * fdt_getprop_u32_default - Find a node and return it's property or a default
55 * @fdt: ptr to device tree
57 * @prop: property name
58 * @dflt: default value if the property isn't found
60 * Convenience function to find a node and return it's property or a
61 * default value if it doesn't exist.
63 u32 fdt_getprop_u32_default(const void *fdt, const char *path,
64 const char *prop, const u32 dflt)
69 off = fdt_path_offset(fdt, path);
73 val = fdt_getprop(fdt, off, prop, NULL);
75 return fdt32_to_cpu(*val);
81 * fdt_find_and_setprop: Find a node and set it's property
83 * @fdt: ptr to device tree
85 * @prop: property name
86 * @val: ptr to new value
87 * @len: length of new property value
88 * @create: flag to create the property if it doesn't exist
90 * Convenience function to directly set a property given the path to the node.
92 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
93 const void *val, int len, int create)
95 int nodeoff = fdt_path_offset(fdt, node);
100 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
101 return 0; /* create flag not set; so exit quietly */
103 return fdt_setprop(fdt, nodeoff, prop, val, len);
106 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS
108 #ifdef CONFIG_CONS_INDEX
109 static void fdt_fill_multisername(char *sername, size_t maxlen)
111 const char *outname = stdio_devices[stdout]->name;
113 if (strcmp(outname, "serial") > 0)
114 strncpy(sername, outname, maxlen);
117 if (strcmp(outname + 1, "serial") > 0)
118 strncpy(sername, outname + 1, maxlen);
122 static int fdt_fixup_stdout(void *fdt, int chosenoff)
125 #ifdef CONFIG_CONS_INDEX
127 char sername[9] = { 0 };
130 fdt_fill_multisername(sername, sizeof(sername) - 1);
132 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
134 err = node = fdt_path_offset(fdt, "/aliases");
137 path = fdt_getprop(fdt, node, sername, &len);
139 char *p = malloc(len);
140 err = -FDT_ERR_NOSPACE;
142 memcpy(p, path, len);
143 err = fdt_setprop(fdt, chosenoff,
144 "linux,stdout-path", p, len);
153 printf("WARNING: could not set linux,stdout-path %s.\n",
160 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force)
162 int nodeoffset, addr_cell_len;
168 /* Find the "chosen" node. */
169 nodeoffset = fdt_path_offset (fdt, "/chosen");
171 /* If there is no "chosen" node in the blob return */
172 if (nodeoffset < 0) {
173 printf("fdt_initrd: %s\n", fdt_strerror(nodeoffset));
177 /* just return if initrd_start/end aren't valid */
178 if ((initrd_start == 0) || (initrd_end == 0))
181 total = fdt_num_mem_rsv(fdt);
184 * Look for an existing entry and update it. If we don't find
185 * the entry, we will j be the next available slot.
187 for (j = 0; j < total; j++) {
188 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
189 if (addr == initrd_start) {
190 fdt_del_mem_rsv(fdt, j);
195 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
197 printf("fdt_initrd: %s\n", fdt_strerror(err));
201 addr_cell_len = get_cells_len(fdt, "#address-cells");
203 path = fdt_getprop(fdt, nodeoffset, "linux,initrd-start", NULL);
204 if ((path == NULL) || force) {
205 write_cell((u8 *)&tmp, initrd_start, addr_cell_len);
206 err = fdt_setprop(fdt, nodeoffset,
207 "linux,initrd-start", &tmp, addr_cell_len);
210 "could not set linux,initrd-start %s.\n",
214 write_cell((u8 *)&tmp, initrd_end, addr_cell_len);
215 err = fdt_setprop(fdt, nodeoffset,
216 "linux,initrd-end", &tmp, addr_cell_len);
218 printf("WARNING: could not set linux,initrd-end %s.\n",
228 int fdt_chosen(void *fdt, int force)
232 char *str; /* used to set string properties */
235 err = fdt_check_header(fdt);
237 printf("fdt_chosen: %s\n", fdt_strerror(err));
242 * Find the "chosen" node.
244 nodeoffset = fdt_path_offset (fdt, "/chosen");
247 * If there is no "chosen" node in the blob, create it.
249 if (nodeoffset < 0) {
251 * Create a new node "/chosen" (offset 0 is root level)
253 nodeoffset = fdt_add_subnode(fdt, 0, "chosen");
254 if (nodeoffset < 0) {
255 printf("WARNING: could not create /chosen %s.\n",
256 fdt_strerror(nodeoffset));
262 * Create /chosen properites that don't exist in the fdt.
263 * If the property exists, update it only if the "force" parameter
266 str = getenv("bootargs");
268 path = fdt_getprop(fdt, nodeoffset, "bootargs", NULL);
269 if ((path == NULL) || force) {
270 err = fdt_setprop(fdt, nodeoffset,
271 "bootargs", str, strlen(str)+1);
273 printf("WARNING: could not set bootargs %s.\n",
278 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS
279 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
280 if ((path == NULL) || force)
281 err = fdt_fixup_stdout(fdt, nodeoffset);
284 #ifdef OF_STDOUT_PATH
285 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
286 if ((path == NULL) || force) {
287 err = fdt_setprop(fdt, nodeoffset,
288 "linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1);
290 printf("WARNING: could not set linux,stdout-path %s.\n",
298 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
299 const void *val, int len, int create)
303 debug("Updating property '%s/%s' = ", path, prop);
304 for (i = 0; i < len; i++)
305 debug(" %.2x", *(u8*)(val+i));
308 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
310 printf("Unable to update property %s:%s, err=%s\n",
311 path, prop, fdt_strerror(rc));
314 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
317 fdt32_t tmp = cpu_to_fdt32(val);
318 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
321 void do_fixup_by_prop(void *fdt,
322 const char *pname, const void *pval, int plen,
323 const char *prop, const void *val, int len,
329 debug("Updating property '%s' = ", prop);
330 for (i = 0; i < len; i++)
331 debug(" %.2x", *(u8*)(val+i));
334 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
335 while (off != -FDT_ERR_NOTFOUND) {
336 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
337 fdt_setprop(fdt, off, prop, val, len);
338 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
342 void do_fixup_by_prop_u32(void *fdt,
343 const char *pname, const void *pval, int plen,
344 const char *prop, u32 val, int create)
346 fdt32_t tmp = cpu_to_fdt32(val);
347 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
350 void do_fixup_by_compat(void *fdt, const char *compat,
351 const char *prop, const void *val, int len, int create)
356 debug("Updating property '%s' = ", prop);
357 for (i = 0; i < len; i++)
358 debug(" %.2x", *(u8*)(val+i));
361 off = fdt_node_offset_by_compatible(fdt, -1, compat);
362 while (off != -FDT_ERR_NOTFOUND) {
363 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
364 fdt_setprop(fdt, off, prop, val, len);
365 off = fdt_node_offset_by_compatible(fdt, off, compat);
369 void do_fixup_by_compat_u32(void *fdt, const char *compat,
370 const char *prop, u32 val, int create)
372 fdt32_t tmp = cpu_to_fdt32(val);
373 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
376 #ifdef CONFIG_NR_DRAM_BANKS
377 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
379 #define MEMORY_BANKS_MAX 4
381 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
384 int addr_cell_len, size_cell_len, len;
385 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
388 if (banks > MEMORY_BANKS_MAX) {
389 printf("%s: num banks %d exceeds hardcoded limit %d."
390 " Recompile with higher MEMORY_BANKS_MAX?\n",
391 __FUNCTION__, banks, MEMORY_BANKS_MAX);
395 err = fdt_check_header(blob);
397 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
401 /* update, or add and update /memory node */
402 nodeoffset = fdt_path_offset(blob, "/memory");
403 if (nodeoffset < 0) {
404 nodeoffset = fdt_add_subnode(blob, 0, "memory");
405 if (nodeoffset < 0) {
406 printf("WARNING: could not create /memory: %s.\n",
407 fdt_strerror(nodeoffset));
411 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
414 printf("WARNING: could not set %s %s.\n", "device_type",
419 addr_cell_len = get_cells_len(blob, "#address-cells");
420 size_cell_len = get_cells_len(blob, "#size-cells");
422 for (bank = 0, len = 0; bank < banks; bank++) {
423 write_cell(tmp + len, start[bank], addr_cell_len);
424 len += addr_cell_len;
426 write_cell(tmp + len, size[bank], size_cell_len);
427 len += size_cell_len;
430 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
432 printf("WARNING: could not set %s %s.\n",
433 "reg", fdt_strerror(err));
439 int fdt_fixup_memory(void *blob, u64 start, u64 size)
441 return fdt_fixup_memory_banks(blob, &start, &size, 1);
444 void fdt_fixup_ethernet(void *fdt)
447 char enet[16], *tmp, *end;
450 unsigned char mac_addr[6];
452 node = fdt_path_offset(fdt, "/aliases");
457 strcpy(mac, "ethaddr");
458 while ((tmp = getenv(mac)) != NULL) {
459 sprintf(enet, "ethernet%d", i);
460 path = fdt_getprop(fdt, node, enet, NULL);
462 debug("No alias for %s\n", enet);
463 sprintf(mac, "eth%daddr", ++i);
467 for (j = 0; j < 6; j++) {
468 mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
470 tmp = (*end) ? end+1 : end;
473 do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0);
474 do_fixup_by_path(fdt, path, "local-mac-address",
477 sprintf(mac, "eth%daddr", ++i);
481 /* Resize the fdt to its actual size + a bit of padding */
482 int fdt_resize(void *blob)
492 total = fdt_num_mem_rsv(blob);
493 for (i = 0; i < total; i++) {
494 fdt_get_mem_rsv(blob, i, &addr, &size);
495 if (addr == (uintptr_t)blob) {
496 fdt_del_mem_rsv(blob, i);
502 * Calculate the actual size of the fdt
503 * plus the size needed for 5 fdt_add_mem_rsv, one
504 * for the fdt itself and 4 for a possible initrd
505 * ((initrd-start + initrd-end) * 2 (name & value))
507 actualsize = fdt_off_dt_strings(blob) +
508 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
510 /* Make it so the fdt ends on a page boundary */
511 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
512 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
514 /* Change the fdt header to reflect the correct size */
515 fdt_set_totalsize(blob, actualsize);
517 /* Add the new reservation */
518 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize);
526 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
528 #define FDT_PCI_PREFETCH (0x40000000)
529 #define FDT_PCI_MEM32 (0x02000000)
530 #define FDT_PCI_IO (0x01000000)
531 #define FDT_PCI_MEM64 (0x03000000)
533 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
535 int addrcell, sizecell, len, r;
537 /* sized based on pci addr cells, size-cells, & address-cells */
538 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
540 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
541 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
543 dma_range = &dma_ranges[0];
544 for (r = 0; r < hose->region_count; r++) {
545 u64 bus_start, phys_start, size;
547 /* skip if !PCI_REGION_SYS_MEMORY */
548 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
551 bus_start = (u64)hose->regions[r].bus_start;
552 phys_start = (u64)hose->regions[r].phys_start;
553 size = (u64)hose->regions[r].size;
556 if (size >= 0x100000000ull)
557 dma_range[0] |= FDT_PCI_MEM64;
559 dma_range[0] |= FDT_PCI_MEM32;
560 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
561 dma_range[0] |= FDT_PCI_PREFETCH;
562 #ifdef CONFIG_SYS_PCI_64BIT
563 dma_range[1] = bus_start >> 32;
567 dma_range[2] = bus_start & 0xffffffff;
570 dma_range[3] = phys_start >> 32;
571 dma_range[4] = phys_start & 0xffffffff;
573 dma_range[3] = phys_start & 0xffffffff;
577 dma_range[3 + addrcell + 0] = size >> 32;
578 dma_range[3 + addrcell + 1] = size & 0xffffffff;
580 dma_range[3 + addrcell + 0] = size & 0xffffffff;
583 dma_range += (3 + addrcell + sizecell);
586 len = dma_range - &dma_ranges[0];
588 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
594 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
596 * Provide a weak default function to return the flash bank size.
597 * There might be multiple non-identical flash chips connected to one
598 * chip-select, so we need to pass an index as well.
600 u32 __flash_get_bank_size(int cs, int idx)
602 extern flash_info_t flash_info[];
605 * As default, a simple 1:1 mapping is provided. Boards with
606 * a different mapping need to supply a board specific mapping
609 return flash_info[cs].size;
611 u32 flash_get_bank_size(int cs, int idx)
612 __attribute__((weak, alias("__flash_get_bank_size")));
615 * This function can be used to update the size in the "reg" property
616 * of all NOR FLASH device nodes. This is necessary for boards with
617 * non-fixed NOR FLASH sizes.
619 int fdt_fixup_nor_flash_size(void *blob)
621 char compat[][16] = { "cfi-flash", "jedec-flash" };
624 struct fdt_property *prop;
628 for (i = 0; i < 2; i++) {
629 off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
630 while (off != -FDT_ERR_NOTFOUND) {
634 * Found one compatible node, so fixup the size
635 * int its reg properties
637 prop = fdt_get_property_w(blob, off, "reg", &len);
639 int tuple_size = 3 * sizeof(reg);
642 * There might be multiple reg-tuples,
643 * so loop through them all
645 reg = reg2 = (u32 *)&prop->data[0];
646 for (idx = 0; idx < (len / tuple_size); idx++) {
648 * Update size in reg property
650 reg[2] = flash_get_bank_size(reg[0],
654 * Point to next reg tuple
659 fdt_setprop(blob, off, "reg", reg2, len);
662 /* Move to next compatible node */
663 off = fdt_node_offset_by_compatible(blob, off,
672 int fdt_increase_size(void *fdt, int add_len)
676 newlen = fdt_totalsize(fdt) + add_len;
678 /* Open in place with a new len */
679 return fdt_open_into(fdt, fdt, newlen);
682 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
683 #include <jffs2/load_kernel.h>
684 #include <mtd_node.h>
691 int fdt_del_subnodes(const void *blob, int parent_offset)
696 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
697 (off >= 0) && (ndepth > 0);
698 off = fdt_next_node(blob, off, &ndepth)) {
700 debug("delete %s: offset: %x\n",
701 fdt_get_name(blob, off, 0), off);
702 ret = fdt_del_node((void *)blob, off);
704 printf("Can't delete node: %s\n",
716 int fdt_del_partitions(void *blob, int parent_offset)
723 off = fdt_next_node(blob, parent_offset, &ndepth);
724 if (off > 0 && ndepth == 1) {
725 prop = fdt_getprop(blob, off, "label", NULL);
728 * Could not find label property, nand {}; node?
729 * Check subnode, delete partitions there if any.
731 return fdt_del_partitions(blob, off);
733 ret = fdt_del_subnodes(blob, parent_offset);
735 printf("Can't remove subnodes: %s\n",
744 int fdt_node_set_part_info(void *blob, int parent_offset,
745 struct mtd_device *dev)
747 struct list_head *pentry;
748 struct part_info *part;
749 struct reg_cell cell;
754 ret = fdt_del_partitions(blob, parent_offset);
759 * Check if it is nand {}; subnode, adjust
760 * the offset in this case
762 off = fdt_next_node(blob, parent_offset, &ndepth);
763 if (off > 0 && ndepth == 1)
767 list_for_each_prev(pentry, &dev->parts) {
770 part = list_entry(pentry, struct part_info, link);
772 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
773 part_num, part->name, part->size,
774 part->offset, part->mask_flags);
776 sprintf(buf, "partition@%llx", part->offset);
778 ret = fdt_add_subnode(blob, parent_offset, buf);
779 if (ret == -FDT_ERR_NOSPACE) {
780 ret = fdt_increase_size(blob, 512);
785 } else if (ret < 0) {
786 printf("Can't add partition node: %s\n",
792 /* Check MTD_WRITEABLE_CMD flag */
793 if (part->mask_flags & 1) {
795 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
796 if (ret == -FDT_ERR_NOSPACE) {
797 ret = fdt_increase_size(blob, 512);
806 cell.r0 = cpu_to_fdt32(part->offset);
807 cell.r1 = cpu_to_fdt32(part->size);
809 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
810 if (ret == -FDT_ERR_NOSPACE) {
811 ret = fdt_increase_size(blob, 512);
820 ret = fdt_setprop_string(blob, newoff, "label", part->name);
821 if (ret == -FDT_ERR_NOSPACE) {
822 ret = fdt_increase_size(blob, 512);
834 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
837 printf("Can't add property: %s\n", fdt_strerror(ret));
842 * Update partitions in nor/nand nodes using info from
843 * mtdparts environment variable. The nodes to update are
844 * specified by node_info structure which contains mtd device
845 * type and compatible string: E. g. the board code in
846 * ft_board_setup() could use:
848 * struct node_info nodes[] = {
849 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
850 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
853 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
855 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
857 struct node_info *ni = node_info;
858 struct mtd_device *dev;
863 parts = getenv("mtdparts");
867 if (mtdparts_init() != 0)
870 for (i = 0; i < node_info_size; i++) {
872 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
873 while (noff != -FDT_ERR_NOTFOUND) {
874 debug("%s: %s, mtd dev type %d\n",
875 fdt_get_name(blob, noff, 0),
876 ni[i].compat, ni[i].type);
877 dev = device_find(ni[i].type, idx++);
879 if (fdt_node_set_part_info(blob, noff, dev))
880 return; /* return on error */
883 /* Jump to next flash node */
884 noff = fdt_node_offset_by_compatible(blob, noff,
891 void fdt_del_node_and_alias(void *blob, const char *alias)
893 int off = fdt_path_offset(blob, alias);
898 fdt_del_node(blob, off);
900 off = fdt_path_offset(blob, "/aliases");
901 fdt_delprop(blob, off, alias);
904 /* Helper to read a big number; size is in cells (not bytes) */
905 static inline u64 of_read_number(const fdt32_t *cell, int size)
909 r = (r << 32) | fdt32_to_cpu(*(cell++));
915 /* Max address size we deal with */
916 #define OF_MAX_ADDR_CELLS 4
917 #define OF_BAD_ADDR ((u64)-1)
918 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
923 static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
927 printf(" %08x", *(addr++));
931 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
934 /* Callbacks for bus specific translators */
937 const char *addresses;
938 void (*count_cells)(void *blob, int parentoffset,
939 int *addrc, int *sizec);
940 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
941 int na, int ns, int pna);
942 int (*translate)(fdt32_t *addr, u64 offset, int na);
945 /* Default translator (generic bus) */
946 static void of_bus_default_count_cells(void *blob, int parentoffset,
947 int *addrc, int *sizec)
952 prop = fdt_getprop(blob, parentoffset, "#address-cells", NULL);
954 *addrc = be32_to_cpup(prop);
960 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
962 *sizec = be32_to_cpup(prop);
968 static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
969 int na, int ns, int pna)
973 cp = of_read_number(range, na);
974 s = of_read_number(range + na + pna, ns);
975 da = of_read_number(addr, na);
977 debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n",
980 if (da < cp || da >= (cp + s))
985 static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
987 u64 a = of_read_number(addr, na);
988 memset(addr, 0, na * 4);
991 addr[na - 2] = cpu_to_fdt32(a >> 32);
992 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
997 /* Array of bus specific translators */
998 static struct of_bus of_busses[] = {
1003 .count_cells = of_bus_default_count_cells,
1004 .map = of_bus_default_map,
1005 .translate = of_bus_default_translate,
1009 static int of_translate_one(void * blob, int parent, struct of_bus *bus,
1010 struct of_bus *pbus, fdt32_t *addr,
1011 int na, int ns, int pna, const char *rprop)
1013 const fdt32_t *ranges;
1016 u64 offset = OF_BAD_ADDR;
1018 /* Normally, an absence of a "ranges" property means we are
1019 * crossing a non-translatable boundary, and thus the addresses
1020 * below the current not cannot be converted to CPU physical ones.
1021 * Unfortunately, while this is very clear in the spec, it's not
1022 * what Apple understood, and they do have things like /uni-n or
1023 * /ht nodes with no "ranges" property and a lot of perfectly
1024 * useable mapped devices below them. Thus we treat the absence of
1025 * "ranges" as equivalent to an empty "ranges" property which means
1026 * a 1:1 translation at that level. It's up to the caller not to try
1027 * to translate addresses that aren't supposed to be translated in
1028 * the first place. --BenH.
1030 ranges = fdt_getprop(blob, parent, rprop, &rlen);
1031 if (ranges == NULL || rlen == 0) {
1032 offset = of_read_number(addr, na);
1033 memset(addr, 0, pna * 4);
1034 debug("OF: no ranges, 1:1 translation\n");
1038 debug("OF: walking ranges...\n");
1040 /* Now walk through the ranges */
1042 rone = na + pna + ns;
1043 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1044 offset = bus->map(addr, ranges, na, ns, pna);
1045 if (offset != OF_BAD_ADDR)
1048 if (offset == OF_BAD_ADDR) {
1049 debug("OF: not found !\n");
1052 memcpy(addr, ranges + na, 4 * pna);
1055 of_dump_addr("OF: parent translation for:", addr, pna);
1056 debug("OF: with offset: "PRu64"\n", offset);
1058 /* Translate it into parent bus space */
1059 return pbus->translate(addr, offset, pna);
1063 * Translate an address from the device-tree into a CPU physical address,
1064 * this walks up the tree and applies the various bus mappings on the
1067 * Note: We consider that crossing any level with #size-cells == 0 to mean
1068 * that translation is impossible (that is we are not dealing with a value
1069 * that can be mapped to a cpu physical address). This is not really specified
1070 * that way, but this is traditionally the way IBM at least do things
1072 static u64 __of_translate_address(void *blob, int node_offset, const fdt32_t *in_addr,
1076 struct of_bus *bus, *pbus;
1077 fdt32_t addr[OF_MAX_ADDR_CELLS];
1078 int na, ns, pna, pns;
1079 u64 result = OF_BAD_ADDR;
1081 debug("OF: ** translation for device %s **\n",
1082 fdt_get_name(blob, node_offset, NULL));
1084 /* Get parent & match bus type */
1085 parent = fdt_parent_offset(blob, node_offset);
1088 bus = &of_busses[0];
1090 /* Cound address cells & copy address locally */
1091 bus->count_cells(blob, parent, &na, &ns);
1092 if (!OF_CHECK_COUNTS(na, ns)) {
1093 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1094 fdt_get_name(blob, node_offset, NULL));
1097 memcpy(addr, in_addr, na * 4);
1099 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1100 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1101 of_dump_addr("OF: translating address:", addr, na);
1105 /* Switch to parent bus */
1106 node_offset = parent;
1107 parent = fdt_parent_offset(blob, node_offset);
1109 /* If root, we have finished */
1111 debug("OF: reached root node\n");
1112 result = of_read_number(addr, na);
1116 /* Get new parent bus and counts */
1117 pbus = &of_busses[0];
1118 pbus->count_cells(blob, parent, &pna, &pns);
1119 if (!OF_CHECK_COUNTS(pna, pns)) {
1120 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1121 fdt_get_name(blob, node_offset, NULL));
1125 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1126 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1128 /* Apply bus translation */
1129 if (of_translate_one(blob, node_offset, bus, pbus,
1130 addr, na, ns, pna, rprop))
1133 /* Complete the move up one level */
1138 of_dump_addr("OF: one level translation:", addr, na);
1145 u64 fdt_translate_address(void *blob, int node_offset, const fdt32_t *in_addr)
1147 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1151 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1152 * who's reg property matches a physical cpu address
1154 * @blob: ptr to device tree
1155 * @compat: compatiable string to match
1156 * @compat_off: property name
1159 int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1160 phys_addr_t compat_off)
1162 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1163 while (off != -FDT_ERR_NOTFOUND) {
1164 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
1166 if (compat_off == fdt_translate_address(blob, off, reg))
1169 off = fdt_node_offset_by_compatible(blob, off, compat);
1172 return -FDT_ERR_NOTFOUND;
1176 * fdt_alloc_phandle: Return next free phandle value
1178 * @blob: ptr to device tree
1180 int fdt_alloc_phandle(void *blob)
1182 int offset, phandle = 0;
1184 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1185 offset = fdt_next_node(blob, offset, NULL)) {
1186 phandle = max(phandle, fdt_get_phandle(blob, offset));
1193 * fdt_set_phandle: Create a phandle property for the given node
1195 * @fdt: ptr to device tree
1196 * @nodeoffset: node to update
1197 * @phandle: phandle value to set (must be unique)
1199 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
1204 int off = fdt_node_offset_by_phandle(fdt, phandle);
1206 if ((off >= 0) && (off != nodeoffset)) {
1209 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1210 printf("Trying to update node %s with phandle %u ",
1213 fdt_get_path(fdt, off, buf, sizeof(buf));
1214 printf("that already exists in node %s.\n", buf);
1215 return -FDT_ERR_BADPHANDLE;
1219 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1224 * For now, also set the deprecated "linux,phandle" property, so that we
1225 * don't break older kernels.
1227 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1233 * fdt_create_phandle: Create a phandle property for the given node
1235 * @fdt: ptr to device tree
1236 * @nodeoffset: node to update
1238 unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
1240 /* see if there is a phandle already */
1241 int phandle = fdt_get_phandle(fdt, nodeoffset);
1243 /* if we got 0, means no phandle so create one */
1247 phandle = fdt_alloc_phandle(fdt);
1248 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1250 printf("Can't set phandle %u: %s\n", phandle,
1260 * fdt_set_node_status: Set status for the given node
1262 * @fdt: ptr to device tree
1263 * @nodeoffset: node to update
1264 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1265 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1266 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1268 int fdt_set_node_status(void *fdt, int nodeoffset,
1269 enum fdt_status status, unsigned int error_code)
1278 case FDT_STATUS_OKAY:
1279 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1281 case FDT_STATUS_DISABLED:
1282 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1284 case FDT_STATUS_FAIL:
1285 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1287 case FDT_STATUS_FAIL_ERROR_CODE:
1288 sprintf(buf, "fail-%d", error_code);
1289 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1292 printf("Invalid fdt status: %x\n", status);
1301 * fdt_set_status_by_alias: Set status for the given node given an alias
1303 * @fdt: ptr to device tree
1304 * @alias: alias of node to update
1305 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1306 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1307 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1309 int fdt_set_status_by_alias(void *fdt, const char* alias,
1310 enum fdt_status status, unsigned int error_code)
1312 int offset = fdt_path_offset(fdt, alias);
1314 return fdt_set_node_status(fdt, offset, status, error_code);
1317 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
1318 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1323 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1324 if (noff != -FDT_ERR_NOTFOUND) {
1325 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1327 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1328 if (ret == -FDT_ERR_NOSPACE) {
1329 ret = fdt_increase_size(blob, 512);
1334 } else if (ret < 0) {
1335 printf("Can't add property: %s\n", fdt_strerror(ret));
1341 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1347 * Verify the physical address of device tree node for a given alias
1349 * This function locates the device tree node of a given alias, and then
1350 * verifies that the physical address of that device matches the given
1351 * parameter. It displays a message if there is a mismatch.
1353 * Returns 1 on success, 0 on failure
1355 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1362 path = fdt_getprop(fdt, anode, alias, NULL);
1364 /* If there's no such alias, then it's not a failure */
1368 node = fdt_path_offset(fdt, path);
1370 printf("Warning: device tree alias '%s' points to invalid "
1371 "node %s.\n", alias, path);
1375 reg = fdt_getprop(fdt, node, "reg", &len);
1377 printf("Warning: device tree node '%s' has no address.\n",
1382 dt_addr = fdt_translate_address(fdt, node, reg);
1383 if (addr != dt_addr) {
1384 printf("Warning: U-Boot configured device %s at address %llx,\n"
1385 " but the device tree has it address %llx.\n",
1386 alias, addr, dt_addr);
1394 * Returns the base address of an SOC or PCI node
1396 u64 fdt_get_base_address(void *fdt, int node)
1400 const fdt32_t *prop;
1402 prop = fdt_getprop(fdt, node, "#address-cells", &size);
1403 if (prop && size == 4)
1404 naddr = be32_to_cpup(prop);
1408 prop = fdt_getprop(fdt, node, "ranges", &size);
1410 return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0;