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_node - Return a node's property or a default
55 * @fdt: ptr to device tree
56 * @off: offset of node
57 * @cell: cell offset in property
58 * @prop: property name
59 * @dflt: default value if the property isn't found
61 * Convenience function to return a node's property or a default value if
62 * the property doesn't exist.
64 u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
65 const char *prop, const u32 dflt)
70 val = fdt_getprop(fdt, off, prop, &len);
72 /* Check if property exists */
76 /* Check if property is long enough */
77 if (len < ((cell + 1) * sizeof(uint32_t)))
80 return fdt32_to_cpu(*val);
84 * fdt_getprop_u32_default - Find a node and return it's property or a default
86 * @fdt: ptr to device tree
88 * @prop: property name
89 * @dflt: default value if the property isn't found
91 * Convenience function to find a node and return it's property or a
92 * default value if it doesn't exist.
94 u32 fdt_getprop_u32_default(const void *fdt, const char *path,
95 const char *prop, const u32 dflt)
99 off = fdt_path_offset(fdt, path);
103 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt);
107 * fdt_find_and_setprop: Find a node and set it's property
109 * @fdt: ptr to device tree
110 * @node: path of node
111 * @prop: property name
112 * @val: ptr to new value
113 * @len: length of new property value
114 * @create: flag to create the property if it doesn't exist
116 * Convenience function to directly set a property given the path to the node.
118 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
119 const void *val, int len, int create)
121 int nodeoff = fdt_path_offset(fdt, node);
126 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
127 return 0; /* create flag not set; so exit quietly */
129 return fdt_setprop(fdt, nodeoff, prop, val, len);
132 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS
134 #ifdef CONFIG_CONS_INDEX
135 static void fdt_fill_multisername(char *sername, size_t maxlen)
137 const char *outname = stdio_devices[stdout]->name;
139 if (strcmp(outname, "serial") > 0)
140 strncpy(sername, outname, maxlen);
143 if (strcmp(outname + 1, "serial") > 0)
144 strncpy(sername, outname + 1, maxlen);
148 static int fdt_fixup_stdout(void *fdt, int chosenoff)
151 #ifdef CONFIG_CONS_INDEX
153 char sername[9] = { 0 };
156 fdt_fill_multisername(sername, sizeof(sername) - 1);
158 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
160 err = node = fdt_path_offset(fdt, "/aliases");
163 path = fdt_getprop(fdt, node, sername, &len);
165 char *p = malloc(len);
166 err = -FDT_ERR_NOSPACE;
168 memcpy(p, path, len);
169 err = fdt_setprop(fdt, chosenoff,
170 "linux,stdout-path", p, len);
179 printf("WARNING: could not set linux,stdout-path %s.\n",
186 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force)
188 int nodeoffset, addr_cell_len;
194 /* Find the "chosen" node. */
195 nodeoffset = fdt_path_offset (fdt, "/chosen");
197 /* If there is no "chosen" node in the blob return */
198 if (nodeoffset < 0) {
199 printf("fdt_initrd: %s\n", fdt_strerror(nodeoffset));
203 /* just return if initrd_start/end aren't valid */
204 if ((initrd_start == 0) || (initrd_end == 0))
207 total = fdt_num_mem_rsv(fdt);
210 * Look for an existing entry and update it. If we don't find
211 * the entry, we will j be the next available slot.
213 for (j = 0; j < total; j++) {
214 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
215 if (addr == initrd_start) {
216 fdt_del_mem_rsv(fdt, j);
221 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
223 printf("fdt_initrd: %s\n", fdt_strerror(err));
227 addr_cell_len = get_cells_len(fdt, "#address-cells");
229 path = fdt_getprop(fdt, nodeoffset, "linux,initrd-start", NULL);
230 if ((path == NULL) || force) {
231 write_cell((u8 *)&tmp, initrd_start, addr_cell_len);
232 err = fdt_setprop(fdt, nodeoffset,
233 "linux,initrd-start", &tmp, addr_cell_len);
236 "could not set linux,initrd-start %s.\n",
240 write_cell((u8 *)&tmp, initrd_end, addr_cell_len);
241 err = fdt_setprop(fdt, nodeoffset,
242 "linux,initrd-end", &tmp, addr_cell_len);
244 printf("WARNING: could not set linux,initrd-end %s.\n",
254 int fdt_chosen(void *fdt, int force)
258 char *str; /* used to set string properties */
261 err = fdt_check_header(fdt);
263 printf("fdt_chosen: %s\n", fdt_strerror(err));
268 * Find the "chosen" node.
270 nodeoffset = fdt_path_offset (fdt, "/chosen");
273 * If there is no "chosen" node in the blob, create it.
275 if (nodeoffset < 0) {
277 * Create a new node "/chosen" (offset 0 is root level)
279 nodeoffset = fdt_add_subnode(fdt, 0, "chosen");
280 if (nodeoffset < 0) {
281 printf("WARNING: could not create /chosen %s.\n",
282 fdt_strerror(nodeoffset));
288 * Create /chosen properites that don't exist in the fdt.
289 * If the property exists, update it only if the "force" parameter
292 str = getenv("bootargs");
294 path = fdt_getprop(fdt, nodeoffset, "bootargs", NULL);
295 if ((path == NULL) || force) {
296 err = fdt_setprop(fdt, nodeoffset,
297 "bootargs", str, strlen(str)+1);
299 printf("WARNING: could not set bootargs %s.\n",
304 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS
305 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
306 if ((path == NULL) || force)
307 err = fdt_fixup_stdout(fdt, nodeoffset);
310 #ifdef OF_STDOUT_PATH
311 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
312 if ((path == NULL) || force) {
313 err = fdt_setprop(fdt, nodeoffset,
314 "linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1);
316 printf("WARNING: could not set linux,stdout-path %s.\n",
324 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
325 const void *val, int len, int create)
329 debug("Updating property '%s/%s' = ", path, prop);
330 for (i = 0; i < len; i++)
331 debug(" %.2x", *(u8*)(val+i));
334 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
336 printf("Unable to update property %s:%s, err=%s\n",
337 path, prop, fdt_strerror(rc));
340 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
343 fdt32_t tmp = cpu_to_fdt32(val);
344 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
347 void do_fixup_by_prop(void *fdt,
348 const char *pname, const void *pval, int plen,
349 const char *prop, const void *val, int len,
355 debug("Updating property '%s' = ", prop);
356 for (i = 0; i < len; i++)
357 debug(" %.2x", *(u8*)(val+i));
360 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
361 while (off != -FDT_ERR_NOTFOUND) {
362 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
363 fdt_setprop(fdt, off, prop, val, len);
364 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
368 void do_fixup_by_prop_u32(void *fdt,
369 const char *pname, const void *pval, int plen,
370 const char *prop, u32 val, int create)
372 fdt32_t tmp = cpu_to_fdt32(val);
373 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
376 void do_fixup_by_compat(void *fdt, const char *compat,
377 const char *prop, const void *val, int len, int create)
382 debug("Updating property '%s' = ", prop);
383 for (i = 0; i < len; i++)
384 debug(" %.2x", *(u8*)(val+i));
387 off = fdt_node_offset_by_compatible(fdt, -1, compat);
388 while (off != -FDT_ERR_NOTFOUND) {
389 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
390 fdt_setprop(fdt, off, prop, val, len);
391 off = fdt_node_offset_by_compatible(fdt, off, compat);
395 void do_fixup_by_compat_u32(void *fdt, const char *compat,
396 const char *prop, u32 val, int create)
398 fdt32_t tmp = cpu_to_fdt32(val);
399 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
402 #ifdef CONFIG_NR_DRAM_BANKS
403 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
405 #define MEMORY_BANKS_MAX 4
407 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
410 int addr_cell_len, size_cell_len, len;
411 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
414 if (banks > MEMORY_BANKS_MAX) {
415 printf("%s: num banks %d exceeds hardcoded limit %d."
416 " Recompile with higher MEMORY_BANKS_MAX?\n",
417 __FUNCTION__, banks, MEMORY_BANKS_MAX);
421 err = fdt_check_header(blob);
423 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
427 /* update, or add and update /memory node */
428 nodeoffset = fdt_path_offset(blob, "/memory");
429 if (nodeoffset < 0) {
430 nodeoffset = fdt_add_subnode(blob, 0, "memory");
431 if (nodeoffset < 0) {
432 printf("WARNING: could not create /memory: %s.\n",
433 fdt_strerror(nodeoffset));
437 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
440 printf("WARNING: could not set %s %s.\n", "device_type",
445 addr_cell_len = get_cells_len(blob, "#address-cells");
446 size_cell_len = get_cells_len(blob, "#size-cells");
448 for (bank = 0, len = 0; bank < banks; bank++) {
449 write_cell(tmp + len, start[bank], addr_cell_len);
450 len += addr_cell_len;
452 write_cell(tmp + len, size[bank], size_cell_len);
453 len += size_cell_len;
456 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
458 printf("WARNING: could not set %s %s.\n",
459 "reg", fdt_strerror(err));
465 int fdt_fixup_memory(void *blob, u64 start, u64 size)
467 return fdt_fixup_memory_banks(blob, &start, &size, 1);
470 void fdt_fixup_ethernet(void *fdt)
473 char enet[16], *tmp, *end;
476 unsigned char mac_addr[6];
478 node = fdt_path_offset(fdt, "/aliases");
483 strcpy(mac, "ethaddr");
484 while ((tmp = getenv(mac)) != NULL) {
485 sprintf(enet, "ethernet%d", i);
486 path = fdt_getprop(fdt, node, enet, NULL);
488 debug("No alias for %s\n", enet);
489 sprintf(mac, "eth%daddr", ++i);
493 for (j = 0; j < 6; j++) {
494 mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
496 tmp = (*end) ? end+1 : end;
499 do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0);
500 do_fixup_by_path(fdt, path, "local-mac-address",
503 sprintf(mac, "eth%daddr", ++i);
507 /* Resize the fdt to its actual size + a bit of padding */
508 int fdt_resize(void *blob)
518 total = fdt_num_mem_rsv(blob);
519 for (i = 0; i < total; i++) {
520 fdt_get_mem_rsv(blob, i, &addr, &size);
521 if (addr == (uintptr_t)blob) {
522 fdt_del_mem_rsv(blob, i);
528 * Calculate the actual size of the fdt
529 * plus the size needed for 5 fdt_add_mem_rsv, one
530 * for the fdt itself and 4 for a possible initrd
531 * ((initrd-start + initrd-end) * 2 (name & value))
533 actualsize = fdt_off_dt_strings(blob) +
534 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
536 /* Make it so the fdt ends on a page boundary */
537 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
538 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
540 /* Change the fdt header to reflect the correct size */
541 fdt_set_totalsize(blob, actualsize);
543 /* Add the new reservation */
544 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize);
552 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
554 #define FDT_PCI_PREFETCH (0x40000000)
555 #define FDT_PCI_MEM32 (0x02000000)
556 #define FDT_PCI_IO (0x01000000)
557 #define FDT_PCI_MEM64 (0x03000000)
559 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
561 int addrcell, sizecell, len, r;
563 /* sized based on pci addr cells, size-cells, & address-cells */
564 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
566 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
567 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
569 dma_range = &dma_ranges[0];
570 for (r = 0; r < hose->region_count; r++) {
571 u64 bus_start, phys_start, size;
573 /* skip if !PCI_REGION_SYS_MEMORY */
574 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
577 bus_start = (u64)hose->regions[r].bus_start;
578 phys_start = (u64)hose->regions[r].phys_start;
579 size = (u64)hose->regions[r].size;
582 if (size >= 0x100000000ull)
583 dma_range[0] |= FDT_PCI_MEM64;
585 dma_range[0] |= FDT_PCI_MEM32;
586 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
587 dma_range[0] |= FDT_PCI_PREFETCH;
588 #ifdef CONFIG_SYS_PCI_64BIT
589 dma_range[1] = bus_start >> 32;
593 dma_range[2] = bus_start & 0xffffffff;
596 dma_range[3] = phys_start >> 32;
597 dma_range[4] = phys_start & 0xffffffff;
599 dma_range[3] = phys_start & 0xffffffff;
603 dma_range[3 + addrcell + 0] = size >> 32;
604 dma_range[3 + addrcell + 1] = size & 0xffffffff;
606 dma_range[3 + addrcell + 0] = size & 0xffffffff;
609 dma_range += (3 + addrcell + sizecell);
612 len = dma_range - &dma_ranges[0];
614 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
620 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
622 * Provide a weak default function to return the flash bank size.
623 * There might be multiple non-identical flash chips connected to one
624 * chip-select, so we need to pass an index as well.
626 u32 __flash_get_bank_size(int cs, int idx)
628 extern flash_info_t flash_info[];
631 * As default, a simple 1:1 mapping is provided. Boards with
632 * a different mapping need to supply a board specific mapping
635 return flash_info[cs].size;
637 u32 flash_get_bank_size(int cs, int idx)
638 __attribute__((weak, alias("__flash_get_bank_size")));
641 * This function can be used to update the size in the "reg" property
642 * of all NOR FLASH device nodes. This is necessary for boards with
643 * non-fixed NOR FLASH sizes.
645 int fdt_fixup_nor_flash_size(void *blob)
647 char compat[][16] = { "cfi-flash", "jedec-flash" };
650 struct fdt_property *prop;
654 for (i = 0; i < 2; i++) {
655 off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
656 while (off != -FDT_ERR_NOTFOUND) {
660 * Found one compatible node, so fixup the size
661 * int its reg properties
663 prop = fdt_get_property_w(blob, off, "reg", &len);
665 int tuple_size = 3 * sizeof(reg);
668 * There might be multiple reg-tuples,
669 * so loop through them all
671 reg = reg2 = (u32 *)&prop->data[0];
672 for (idx = 0; idx < (len / tuple_size); idx++) {
674 * Update size in reg property
676 reg[2] = flash_get_bank_size(reg[0],
680 * Point to next reg tuple
685 fdt_setprop(blob, off, "reg", reg2, len);
688 /* Move to next compatible node */
689 off = fdt_node_offset_by_compatible(blob, off,
698 int fdt_increase_size(void *fdt, int add_len)
702 newlen = fdt_totalsize(fdt) + add_len;
704 /* Open in place with a new len */
705 return fdt_open_into(fdt, fdt, newlen);
708 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
709 #include <jffs2/load_kernel.h>
710 #include <mtd_node.h>
717 int fdt_del_subnodes(const void *blob, int parent_offset)
722 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
723 (off >= 0) && (ndepth > 0);
724 off = fdt_next_node(blob, off, &ndepth)) {
726 debug("delete %s: offset: %x\n",
727 fdt_get_name(blob, off, 0), off);
728 ret = fdt_del_node((void *)blob, off);
730 printf("Can't delete node: %s\n",
742 int fdt_del_partitions(void *blob, int parent_offset)
749 off = fdt_next_node(blob, parent_offset, &ndepth);
750 if (off > 0 && ndepth == 1) {
751 prop = fdt_getprop(blob, off, "label", NULL);
754 * Could not find label property, nand {}; node?
755 * Check subnode, delete partitions there if any.
757 return fdt_del_partitions(blob, off);
759 ret = fdt_del_subnodes(blob, parent_offset);
761 printf("Can't remove subnodes: %s\n",
770 int fdt_node_set_part_info(void *blob, int parent_offset,
771 struct mtd_device *dev)
773 struct list_head *pentry;
774 struct part_info *part;
775 struct reg_cell cell;
780 ret = fdt_del_partitions(blob, parent_offset);
785 * Check if it is nand {}; subnode, adjust
786 * the offset in this case
788 off = fdt_next_node(blob, parent_offset, &ndepth);
789 if (off > 0 && ndepth == 1)
793 list_for_each_prev(pentry, &dev->parts) {
796 part = list_entry(pentry, struct part_info, link);
798 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
799 part_num, part->name, part->size,
800 part->offset, part->mask_flags);
802 sprintf(buf, "partition@%llx", part->offset);
804 ret = fdt_add_subnode(blob, parent_offset, buf);
805 if (ret == -FDT_ERR_NOSPACE) {
806 ret = fdt_increase_size(blob, 512);
811 } else if (ret < 0) {
812 printf("Can't add partition node: %s\n",
818 /* Check MTD_WRITEABLE_CMD flag */
819 if (part->mask_flags & 1) {
821 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
822 if (ret == -FDT_ERR_NOSPACE) {
823 ret = fdt_increase_size(blob, 512);
832 cell.r0 = cpu_to_fdt32(part->offset);
833 cell.r1 = cpu_to_fdt32(part->size);
835 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
836 if (ret == -FDT_ERR_NOSPACE) {
837 ret = fdt_increase_size(blob, 512);
846 ret = fdt_setprop_string(blob, newoff, "label", part->name);
847 if (ret == -FDT_ERR_NOSPACE) {
848 ret = fdt_increase_size(blob, 512);
860 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
863 printf("Can't add property: %s\n", fdt_strerror(ret));
868 * Update partitions in nor/nand nodes using info from
869 * mtdparts environment variable. The nodes to update are
870 * specified by node_info structure which contains mtd device
871 * type and compatible string: E. g. the board code in
872 * ft_board_setup() could use:
874 * struct node_info nodes[] = {
875 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
876 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
879 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
881 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
883 struct node_info *ni = node_info;
884 struct mtd_device *dev;
889 parts = getenv("mtdparts");
893 if (mtdparts_init() != 0)
896 for (i = 0; i < node_info_size; i++) {
898 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
899 while (noff != -FDT_ERR_NOTFOUND) {
900 debug("%s: %s, mtd dev type %d\n",
901 fdt_get_name(blob, noff, 0),
902 ni[i].compat, ni[i].type);
903 dev = device_find(ni[i].type, idx++);
905 if (fdt_node_set_part_info(blob, noff, dev))
906 return; /* return on error */
909 /* Jump to next flash node */
910 noff = fdt_node_offset_by_compatible(blob, noff,
917 void fdt_del_node_and_alias(void *blob, const char *alias)
919 int off = fdt_path_offset(blob, alias);
924 fdt_del_node(blob, off);
926 off = fdt_path_offset(blob, "/aliases");
927 fdt_delprop(blob, off, alias);
930 /* Helper to read a big number; size is in cells (not bytes) */
931 static inline u64 of_read_number(const fdt32_t *cell, int size)
935 r = (r << 32) | fdt32_to_cpu(*(cell++));
941 /* Max address size we deal with */
942 #define OF_MAX_ADDR_CELLS 4
943 #define OF_BAD_ADDR ((u64)-1)
944 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
949 static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
953 printf(" %08x", *(addr++));
957 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
960 /* Callbacks for bus specific translators */
963 const char *addresses;
964 void (*count_cells)(void *blob, int parentoffset,
965 int *addrc, int *sizec);
966 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
967 int na, int ns, int pna);
968 int (*translate)(fdt32_t *addr, u64 offset, int na);
971 /* Default translator (generic bus) */
972 static void of_bus_default_count_cells(void *blob, int parentoffset,
973 int *addrc, int *sizec)
978 prop = fdt_getprop(blob, parentoffset, "#address-cells", NULL);
980 *addrc = be32_to_cpup(prop);
986 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
988 *sizec = be32_to_cpup(prop);
994 static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
995 int na, int ns, int pna)
999 cp = of_read_number(range, na);
1000 s = of_read_number(range + na + pna, ns);
1001 da = of_read_number(addr, na);
1003 debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n",
1006 if (da < cp || da >= (cp + s))
1011 static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
1013 u64 a = of_read_number(addr, na);
1014 memset(addr, 0, na * 4);
1017 addr[na - 2] = cpu_to_fdt32(a >> 32);
1018 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
1023 /* Array of bus specific translators */
1024 static struct of_bus of_busses[] = {
1029 .count_cells = of_bus_default_count_cells,
1030 .map = of_bus_default_map,
1031 .translate = of_bus_default_translate,
1035 static int of_translate_one(void * blob, int parent, struct of_bus *bus,
1036 struct of_bus *pbus, fdt32_t *addr,
1037 int na, int ns, int pna, const char *rprop)
1039 const fdt32_t *ranges;
1042 u64 offset = OF_BAD_ADDR;
1044 /* Normally, an absence of a "ranges" property means we are
1045 * crossing a non-translatable boundary, and thus the addresses
1046 * below the current not cannot be converted to CPU physical ones.
1047 * Unfortunately, while this is very clear in the spec, it's not
1048 * what Apple understood, and they do have things like /uni-n or
1049 * /ht nodes with no "ranges" property and a lot of perfectly
1050 * useable mapped devices below them. Thus we treat the absence of
1051 * "ranges" as equivalent to an empty "ranges" property which means
1052 * a 1:1 translation at that level. It's up to the caller not to try
1053 * to translate addresses that aren't supposed to be translated in
1054 * the first place. --BenH.
1056 ranges = fdt_getprop(blob, parent, rprop, &rlen);
1057 if (ranges == NULL || rlen == 0) {
1058 offset = of_read_number(addr, na);
1059 memset(addr, 0, pna * 4);
1060 debug("OF: no ranges, 1:1 translation\n");
1064 debug("OF: walking ranges...\n");
1066 /* Now walk through the ranges */
1068 rone = na + pna + ns;
1069 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1070 offset = bus->map(addr, ranges, na, ns, pna);
1071 if (offset != OF_BAD_ADDR)
1074 if (offset == OF_BAD_ADDR) {
1075 debug("OF: not found !\n");
1078 memcpy(addr, ranges + na, 4 * pna);
1081 of_dump_addr("OF: parent translation for:", addr, pna);
1082 debug("OF: with offset: "PRu64"\n", offset);
1084 /* Translate it into parent bus space */
1085 return pbus->translate(addr, offset, pna);
1089 * Translate an address from the device-tree into a CPU physical address,
1090 * this walks up the tree and applies the various bus mappings on the
1093 * Note: We consider that crossing any level with #size-cells == 0 to mean
1094 * that translation is impossible (that is we are not dealing with a value
1095 * that can be mapped to a cpu physical address). This is not really specified
1096 * that way, but this is traditionally the way IBM at least do things
1098 static u64 __of_translate_address(void *blob, int node_offset, const fdt32_t *in_addr,
1102 struct of_bus *bus, *pbus;
1103 fdt32_t addr[OF_MAX_ADDR_CELLS];
1104 int na, ns, pna, pns;
1105 u64 result = OF_BAD_ADDR;
1107 debug("OF: ** translation for device %s **\n",
1108 fdt_get_name(blob, node_offset, NULL));
1110 /* Get parent & match bus type */
1111 parent = fdt_parent_offset(blob, node_offset);
1114 bus = &of_busses[0];
1116 /* Cound address cells & copy address locally */
1117 bus->count_cells(blob, parent, &na, &ns);
1118 if (!OF_CHECK_COUNTS(na, ns)) {
1119 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1120 fdt_get_name(blob, node_offset, NULL));
1123 memcpy(addr, in_addr, na * 4);
1125 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1126 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1127 of_dump_addr("OF: translating address:", addr, na);
1131 /* Switch to parent bus */
1132 node_offset = parent;
1133 parent = fdt_parent_offset(blob, node_offset);
1135 /* If root, we have finished */
1137 debug("OF: reached root node\n");
1138 result = of_read_number(addr, na);
1142 /* Get new parent bus and counts */
1143 pbus = &of_busses[0];
1144 pbus->count_cells(blob, parent, &pna, &pns);
1145 if (!OF_CHECK_COUNTS(pna, pns)) {
1146 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1147 fdt_get_name(blob, node_offset, NULL));
1151 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1152 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1154 /* Apply bus translation */
1155 if (of_translate_one(blob, node_offset, bus, pbus,
1156 addr, na, ns, pna, rprop))
1159 /* Complete the move up one level */
1164 of_dump_addr("OF: one level translation:", addr, na);
1171 u64 fdt_translate_address(void *blob, int node_offset, const fdt32_t *in_addr)
1173 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1177 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1178 * who's reg property matches a physical cpu address
1180 * @blob: ptr to device tree
1181 * @compat: compatiable string to match
1182 * @compat_off: property name
1185 int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1186 phys_addr_t compat_off)
1188 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1189 while (off != -FDT_ERR_NOTFOUND) {
1190 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
1192 if (compat_off == fdt_translate_address(blob, off, reg))
1195 off = fdt_node_offset_by_compatible(blob, off, compat);
1198 return -FDT_ERR_NOTFOUND;
1202 * fdt_alloc_phandle: Return next free phandle value
1204 * @blob: ptr to device tree
1206 int fdt_alloc_phandle(void *blob)
1208 int offset, phandle = 0;
1210 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1211 offset = fdt_next_node(blob, offset, NULL)) {
1212 phandle = max(phandle, fdt_get_phandle(blob, offset));
1219 * fdt_set_phandle: Create a phandle property for the given node
1221 * @fdt: ptr to device tree
1222 * @nodeoffset: node to update
1223 * @phandle: phandle value to set (must be unique)
1225 int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
1230 int off = fdt_node_offset_by_phandle(fdt, phandle);
1232 if ((off >= 0) && (off != nodeoffset)) {
1235 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1236 printf("Trying to update node %s with phandle %u ",
1239 fdt_get_path(fdt, off, buf, sizeof(buf));
1240 printf("that already exists in node %s.\n", buf);
1241 return -FDT_ERR_BADPHANDLE;
1245 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1250 * For now, also set the deprecated "linux,phandle" property, so that we
1251 * don't break older kernels.
1253 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1259 * fdt_create_phandle: Create a phandle property for the given node
1261 * @fdt: ptr to device tree
1262 * @nodeoffset: node to update
1264 unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
1266 /* see if there is a phandle already */
1267 int phandle = fdt_get_phandle(fdt, nodeoffset);
1269 /* if we got 0, means no phandle so create one */
1273 phandle = fdt_alloc_phandle(fdt);
1274 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1276 printf("Can't set phandle %u: %s\n", phandle,
1286 * fdt_set_node_status: Set status for the given node
1288 * @fdt: ptr to device tree
1289 * @nodeoffset: node to update
1290 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1291 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1292 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1294 int fdt_set_node_status(void *fdt, int nodeoffset,
1295 enum fdt_status status, unsigned int error_code)
1304 case FDT_STATUS_OKAY:
1305 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1307 case FDT_STATUS_DISABLED:
1308 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1310 case FDT_STATUS_FAIL:
1311 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1313 case FDT_STATUS_FAIL_ERROR_CODE:
1314 sprintf(buf, "fail-%d", error_code);
1315 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1318 printf("Invalid fdt status: %x\n", status);
1327 * fdt_set_status_by_alias: Set status for the given node given an alias
1329 * @fdt: ptr to device tree
1330 * @alias: alias of node to update
1331 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1332 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1333 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1335 int fdt_set_status_by_alias(void *fdt, const char* alias,
1336 enum fdt_status status, unsigned int error_code)
1338 int offset = fdt_path_offset(fdt, alias);
1340 return fdt_set_node_status(fdt, offset, status, error_code);
1343 #if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
1344 int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1349 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1350 if (noff != -FDT_ERR_NOTFOUND) {
1351 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1353 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1354 if (ret == -FDT_ERR_NOSPACE) {
1355 ret = fdt_increase_size(blob, 512);
1360 } else if (ret < 0) {
1361 printf("Can't add property: %s\n", fdt_strerror(ret));
1367 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1373 * Verify the physical address of device tree node for a given alias
1375 * This function locates the device tree node of a given alias, and then
1376 * verifies that the physical address of that device matches the given
1377 * parameter. It displays a message if there is a mismatch.
1379 * Returns 1 on success, 0 on failure
1381 int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1388 path = fdt_getprop(fdt, anode, alias, NULL);
1390 /* If there's no such alias, then it's not a failure */
1394 node = fdt_path_offset(fdt, path);
1396 printf("Warning: device tree alias '%s' points to invalid "
1397 "node %s.\n", alias, path);
1401 reg = fdt_getprop(fdt, node, "reg", &len);
1403 printf("Warning: device tree node '%s' has no address.\n",
1408 dt_addr = fdt_translate_address(fdt, node, reg);
1409 if (addr != dt_addr) {
1410 printf("Warning: U-Boot configured device %s at address %llx,\n"
1411 " but the device tree has it address %llx.\n",
1412 alias, addr, dt_addr);
1420 * Returns the base address of an SOC or PCI node
1422 u64 fdt_get_base_address(void *fdt, int node)
1426 const fdt32_t *prop;
1428 prop = fdt_getprop(fdt, node, "#address-cells", &size);
1429 if (prop && size == 4)
1430 naddr = be32_to_cpup(prop);
1434 prop = fdt_getprop(fdt, node, "ranges", &size);
1436 return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0;
1440 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1442 static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1443 uint64_t *val, int cells)
1445 const fdt32_t *prop32 = &prop[cell_off];
1446 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];
1448 if ((cell_off + cells) > prop_len)
1449 return -FDT_ERR_NOSPACE;
1453 *val = fdt32_to_cpu(*prop32);
1456 *val = fdt64_to_cpu(*prop64);
1459 return -FDT_ERR_NOSPACE;
1466 * fdt_read_range - Read a node's n'th range property
1468 * @fdt: ptr to device tree
1469 * @node: offset of node
1471 * @child_addr: pointer to storage for the "child address" field
1472 * @addr: pointer to storage for the CPU view translated physical start
1473 * @len: pointer to storage for the range length
1475 * Convenience function that reads and interprets a specific range out of
1476 * a number of the "ranges" property array.
1478 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1479 uint64_t *addr, uint64_t *len)
1481 int pnode = fdt_parent_offset(fdt, node);
1482 const fdt32_t *ranges;
1491 * The "ranges" property is an array of
1492 * { <child address> <parent address> <size in child address space> }
1494 * All 3 elements can span a diffent number of cells. Fetch their size.
1496 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1497 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1498 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1500 /* Now try to get the ranges property */
1501 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1503 return -FDT_ERR_NOTFOUND;
1504 ranges_len /= sizeof(uint32_t);
1506 /* Jump to the n'th entry */
1507 cell = n * (pacells + acells + scells);
1509 /* Read <child address> */
1511 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1518 /* Read <parent address> */
1520 *addr = fdt_translate_address(fdt, node, ranges + cell);
1523 /* Read <size in child address space> */
1525 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);