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 * fdt_getprop_u32_default_node - Return a node's property or a default
22 * @fdt: ptr to device tree
23 * @off: offset of node
24 * @cell: cell offset in property
25 * @prop: property name
26 * @dflt: default value if the property isn't found
28 * Convenience function to return a node's property or a default value if
29 * the property doesn't exist.
31 u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
32 const char *prop, const u32 dflt)
37 val = fdt_getprop(fdt, off, prop, &len);
39 /* Check if property exists */
43 /* Check if property is long enough */
44 if (len < ((cell + 1) * sizeof(uint32_t)))
47 return fdt32_to_cpu(*val);
51 * fdt_getprop_u32_default - Find a node and return it's property or a default
53 * @fdt: ptr to device tree
55 * @prop: property name
56 * @dflt: default value if the property isn't found
58 * Convenience function to find a node and return it's property or a
59 * default value if it doesn't exist.
61 u32 fdt_getprop_u32_default(const void *fdt, const char *path,
62 const char *prop, const u32 dflt)
66 off = fdt_path_offset(fdt, path);
70 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt);
74 * fdt_find_and_setprop: Find a node and set it's property
76 * @fdt: ptr to device tree
78 * @prop: property name
79 * @val: ptr to new value
80 * @len: length of new property value
81 * @create: flag to create the property if it doesn't exist
83 * Convenience function to directly set a property given the path to the node.
85 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
86 const void *val, int len, int create)
88 int nodeoff = fdt_path_offset(fdt, node);
93 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
94 return 0; /* create flag not set; so exit quietly */
96 return fdt_setprop(fdt, nodeoff, prop, val, len);
100 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
102 * @fdt: pointer to the device tree blob
103 * @parentoffset: structure block offset of a node
104 * @name: name of the subnode to locate
106 * fdt_subnode_offset() finds a subnode of the node with a given name.
107 * If the subnode does not exist, it will be created.
109 int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name)
113 offset = fdt_subnode_offset(fdt, parentoffset, name);
115 if (offset == -FDT_ERR_NOTFOUND)
116 offset = fdt_add_subnode(fdt, parentoffset, name);
119 printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset));
124 /* rename to CONFIG_OF_STDOUT_PATH ? */
125 #if defined(OF_STDOUT_PATH)
126 static int fdt_fixup_stdout(void *fdt, int chosenoff)
128 return fdt_setprop(fdt, chosenoff, "linux,stdout-path",
129 OF_STDOUT_PATH, strlen(OF_STDOUT_PATH) + 1);
131 #elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
132 static void fdt_fill_multisername(char *sername, size_t maxlen)
134 const char *outname = stdio_devices[stdout]->name;
136 if (strcmp(outname, "serial") > 0)
137 strncpy(sername, outname, maxlen);
140 if (strcmp(outname + 1, "serial") > 0)
141 strncpy(sername, outname + 1, maxlen);
144 static int fdt_fixup_stdout(void *fdt, int chosenoff)
148 char sername[9] = { 0 };
151 char tmp[256]; /* long enough */
153 fdt_fill_multisername(sername, sizeof(sername) - 1);
155 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
157 aliasoff = fdt_path_offset(fdt, "/aliases");
163 path = fdt_getprop(fdt, aliasoff, sername, &len);
169 /* fdt_setprop may break "path" so we copy it to tmp buffer */
170 memcpy(tmp, path, len);
172 err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len);
175 printf("WARNING: could not set linux,stdout-path %s.\n",
181 static int fdt_fixup_stdout(void *fdt, int chosenoff)
187 static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name,
188 uint64_t val, int is_u64)
191 return fdt_setprop_u64(fdt, nodeoffset, name, val);
193 return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val);
197 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end)
204 /* just return if the size of initrd is zero */
205 if (initrd_start == initrd_end)
208 /* find or create "/chosen" node. */
209 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
213 total = fdt_num_mem_rsv(fdt);
216 * Look for an existing entry and update it. If we don't find
217 * the entry, we will j be the next available slot.
219 for (j = 0; j < total; j++) {
220 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
221 if (addr == initrd_start) {
222 fdt_del_mem_rsv(fdt, j);
227 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
229 printf("fdt_initrd: %s\n", fdt_strerror(err));
233 is_u64 = (fdt_address_cells(fdt, 0) == 2);
235 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start",
236 (uint64_t)initrd_start, is_u64);
239 printf("WARNING: could not set linux,initrd-start %s.\n",
244 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end",
245 (uint64_t)initrd_end, is_u64);
248 printf("WARNING: could not set linux,initrd-end %s.\n",
257 int fdt_chosen(void *fdt)
261 char *str; /* used to set string properties */
263 err = fdt_check_header(fdt);
265 printf("fdt_chosen: %s\n", fdt_strerror(err));
269 /* find or create "/chosen" node. */
270 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
274 str = getenv("bootargs");
276 err = fdt_setprop(fdt, nodeoffset, "bootargs", str,
279 printf("WARNING: could not set bootargs %s.\n",
285 return fdt_fixup_stdout(fdt, nodeoffset);
288 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
289 const void *val, int len, int create)
293 debug("Updating property '%s/%s' = ", path, prop);
294 for (i = 0; i < len; i++)
295 debug(" %.2x", *(u8*)(val+i));
298 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
300 printf("Unable to update property %s:%s, err=%s\n",
301 path, prop, fdt_strerror(rc));
304 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
307 fdt32_t tmp = cpu_to_fdt32(val);
308 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
311 void do_fixup_by_prop(void *fdt,
312 const char *pname, const void *pval, int plen,
313 const char *prop, const void *val, int len,
319 debug("Updating property '%s' = ", prop);
320 for (i = 0; i < len; i++)
321 debug(" %.2x", *(u8*)(val+i));
324 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
325 while (off != -FDT_ERR_NOTFOUND) {
326 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
327 fdt_setprop(fdt, off, prop, val, len);
328 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
332 void do_fixup_by_prop_u32(void *fdt,
333 const char *pname, const void *pval, int plen,
334 const char *prop, u32 val, int create)
336 fdt32_t tmp = cpu_to_fdt32(val);
337 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
340 void do_fixup_by_compat(void *fdt, const char *compat,
341 const char *prop, const void *val, int len, int create)
346 debug("Updating property '%s' = ", prop);
347 for (i = 0; i < len; i++)
348 debug(" %.2x", *(u8*)(val+i));
351 off = fdt_node_offset_by_compatible(fdt, -1, compat);
352 while (off != -FDT_ERR_NOTFOUND) {
353 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
354 fdt_setprop(fdt, off, prop, val, len);
355 off = fdt_node_offset_by_compatible(fdt, off, compat);
359 void do_fixup_by_compat_u32(void *fdt, const char *compat,
360 const char *prop, u32 val, int create)
362 fdt32_t tmp = cpu_to_fdt32(val);
363 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
367 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
369 static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size,
373 int address_len = fdt_address_cells(fdt, 0);
374 int size_len = fdt_size_cells(fdt, 0);
377 for (i = 0; i < n; i++) {
378 if (address_len == 2)
379 *(fdt64_t *)p = cpu_to_fdt64(address[i]);
381 *(fdt32_t *)p = cpu_to_fdt32(address[i]);
385 *(fdt64_t *)p = cpu_to_fdt64(size[i]);
387 *(fdt32_t *)p = cpu_to_fdt32(size[i]);
391 return p - (char *)buf;
394 #ifdef CONFIG_NR_DRAM_BANKS
395 #define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
397 #define MEMORY_BANKS_MAX 4
399 int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
403 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
405 if (banks > MEMORY_BANKS_MAX) {
406 printf("%s: num banks %d exceeds hardcoded limit %d."
407 " Recompile with higher MEMORY_BANKS_MAX?\n",
408 __FUNCTION__, banks, MEMORY_BANKS_MAX);
412 err = fdt_check_header(blob);
414 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
418 /* find or create "/memory" node. */
419 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
423 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
426 printf("WARNING: could not set %s %s.\n", "device_type",
431 len = fdt_pack_reg(blob, tmp, start, size, banks);
433 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
435 printf("WARNING: could not set %s %s.\n",
436 "reg", fdt_strerror(err));
442 int fdt_fixup_memory(void *blob, u64 start, u64 size)
444 return fdt_fixup_memory_banks(blob, &start, &size, 1);
447 void fdt_fixup_ethernet(void *fdt)
450 char enet[16], *tmp, *end;
453 unsigned char mac_addr[6];
455 node = fdt_path_offset(fdt, "/aliases");
459 if (!getenv("ethaddr")) {
460 if (getenv("usbethaddr")) {
461 strcpy(mac, "usbethaddr");
463 debug("No ethernet MAC Address defined\n");
467 strcpy(mac, "ethaddr");
471 while ((tmp = getenv(mac)) != NULL) {
472 sprintf(enet, "ethernet%d", i);
473 path = fdt_getprop(fdt, node, enet, NULL);
475 debug("No alias for %s\n", enet);
476 sprintf(mac, "eth%daddr", ++i);
480 for (j = 0; j < 6; j++) {
481 mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
483 tmp = (*end) ? end+1 : end;
486 do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0);
487 do_fixup_by_path(fdt, path, "local-mac-address",
490 sprintf(mac, "eth%daddr", ++i);
494 /* Resize the fdt to its actual size + a bit of padding */
495 int fdt_shrink_to_minimum(void *blob)
505 total = fdt_num_mem_rsv(blob);
506 for (i = 0; i < total; i++) {
507 fdt_get_mem_rsv(blob, i, &addr, &size);
508 if (addr == (uintptr_t)blob) {
509 fdt_del_mem_rsv(blob, i);
515 * Calculate the actual size of the fdt
516 * plus the size needed for 5 fdt_add_mem_rsv, one
517 * for the fdt itself and 4 for a possible initrd
518 * ((initrd-start + initrd-end) * 2 (name & value))
520 actualsize = fdt_off_dt_strings(blob) +
521 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
523 /* Make it so the fdt ends on a page boundary */
524 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
525 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
527 /* Change the fdt header to reflect the correct size */
528 fdt_set_totalsize(blob, actualsize);
530 /* Add the new reservation */
531 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize);
539 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
541 #define FDT_PCI_PREFETCH (0x40000000)
542 #define FDT_PCI_MEM32 (0x02000000)
543 #define FDT_PCI_IO (0x01000000)
544 #define FDT_PCI_MEM64 (0x03000000)
546 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
548 int addrcell, sizecell, len, r;
550 /* sized based on pci addr cells, size-cells, & address-cells */
551 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
553 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
554 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
556 dma_range = &dma_ranges[0];
557 for (r = 0; r < hose->region_count; r++) {
558 u64 bus_start, phys_start, size;
560 /* skip if !PCI_REGION_SYS_MEMORY */
561 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
564 bus_start = (u64)hose->regions[r].bus_start;
565 phys_start = (u64)hose->regions[r].phys_start;
566 size = (u64)hose->regions[r].size;
569 if (size >= 0x100000000ull)
570 dma_range[0] |= FDT_PCI_MEM64;
572 dma_range[0] |= FDT_PCI_MEM32;
573 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
574 dma_range[0] |= FDT_PCI_PREFETCH;
575 #ifdef CONFIG_SYS_PCI_64BIT
576 dma_range[1] = bus_start >> 32;
580 dma_range[2] = bus_start & 0xffffffff;
583 dma_range[3] = phys_start >> 32;
584 dma_range[4] = phys_start & 0xffffffff;
586 dma_range[3] = phys_start & 0xffffffff;
590 dma_range[3 + addrcell + 0] = size >> 32;
591 dma_range[3 + addrcell + 1] = size & 0xffffffff;
593 dma_range[3 + addrcell + 0] = size & 0xffffffff;
596 dma_range += (3 + addrcell + sizecell);
599 len = dma_range - &dma_ranges[0];
601 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
607 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
609 * Provide a weak default function to return the flash bank size.
610 * There might be multiple non-identical flash chips connected to one
611 * chip-select, so we need to pass an index as well.
613 u32 __flash_get_bank_size(int cs, int idx)
615 extern flash_info_t flash_info[];
618 * As default, a simple 1:1 mapping is provided. Boards with
619 * a different mapping need to supply a board specific mapping
622 return flash_info[cs].size;
624 u32 flash_get_bank_size(int cs, int idx)
625 __attribute__((weak, alias("__flash_get_bank_size")));
628 * This function can be used to update the size in the "reg" property
629 * of all NOR FLASH device nodes. This is necessary for boards with
630 * non-fixed NOR FLASH sizes.
632 int fdt_fixup_nor_flash_size(void *blob)
634 char compat[][16] = { "cfi-flash", "jedec-flash" };
637 struct fdt_property *prop;
641 for (i = 0; i < 2; i++) {
642 off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
643 while (off != -FDT_ERR_NOTFOUND) {
647 * Found one compatible node, so fixup the size
648 * int its reg properties
650 prop = fdt_get_property_w(blob, off, "reg", &len);
652 int tuple_size = 3 * sizeof(reg);
655 * There might be multiple reg-tuples,
656 * so loop through them all
658 reg = reg2 = (u32 *)&prop->data[0];
659 for (idx = 0; idx < (len / tuple_size); idx++) {
661 * Update size in reg property
663 reg[2] = flash_get_bank_size(reg[0],
667 * Point to next reg tuple
672 fdt_setprop(blob, off, "reg", reg2, len);
675 /* Move to next compatible node */
676 off = fdt_node_offset_by_compatible(blob, off,
685 int fdt_increase_size(void *fdt, int add_len)
689 newlen = fdt_totalsize(fdt) + add_len;
691 /* Open in place with a new len */
692 return fdt_open_into(fdt, fdt, newlen);
695 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
696 #include <jffs2/load_kernel.h>
697 #include <mtd_node.h>
704 int fdt_del_subnodes(const void *blob, int parent_offset)
709 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
710 (off >= 0) && (ndepth > 0);
711 off = fdt_next_node(blob, off, &ndepth)) {
713 debug("delete %s: offset: %x\n",
714 fdt_get_name(blob, off, 0), off);
715 ret = fdt_del_node((void *)blob, off);
717 printf("Can't delete node: %s\n",
729 int fdt_del_partitions(void *blob, int parent_offset)
736 off = fdt_next_node(blob, parent_offset, &ndepth);
737 if (off > 0 && ndepth == 1) {
738 prop = fdt_getprop(blob, off, "label", NULL);
741 * Could not find label property, nand {}; node?
742 * Check subnode, delete partitions there if any.
744 return fdt_del_partitions(blob, off);
746 ret = fdt_del_subnodes(blob, parent_offset);
748 printf("Can't remove subnodes: %s\n",
757 int fdt_node_set_part_info(void *blob, int parent_offset,
758 struct mtd_device *dev)
760 struct list_head *pentry;
761 struct part_info *part;
762 struct reg_cell cell;
767 ret = fdt_del_partitions(blob, parent_offset);
772 * Check if it is nand {}; subnode, adjust
773 * the offset in this case
775 off = fdt_next_node(blob, parent_offset, &ndepth);
776 if (off > 0 && ndepth == 1)
780 list_for_each_prev(pentry, &dev->parts) {
783 part = list_entry(pentry, struct part_info, link);
785 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
786 part_num, part->name, part->size,
787 part->offset, part->mask_flags);
789 sprintf(buf, "partition@%llx", part->offset);
791 ret = fdt_add_subnode(blob, parent_offset, buf);
792 if (ret == -FDT_ERR_NOSPACE) {
793 ret = fdt_increase_size(blob, 512);
798 } else if (ret < 0) {
799 printf("Can't add partition node: %s\n",
805 /* Check MTD_WRITEABLE_CMD flag */
806 if (part->mask_flags & 1) {
808 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
809 if (ret == -FDT_ERR_NOSPACE) {
810 ret = fdt_increase_size(blob, 512);
819 cell.r0 = cpu_to_fdt32(part->offset);
820 cell.r1 = cpu_to_fdt32(part->size);
822 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
823 if (ret == -FDT_ERR_NOSPACE) {
824 ret = fdt_increase_size(blob, 512);
833 ret = fdt_setprop_string(blob, newoff, "label", part->name);
834 if (ret == -FDT_ERR_NOSPACE) {
835 ret = fdt_increase_size(blob, 512);
847 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
850 printf("Can't add property: %s\n", fdt_strerror(ret));
855 * Update partitions in nor/nand nodes using info from
856 * mtdparts environment variable. The nodes to update are
857 * specified by node_info structure which contains mtd device
858 * type and compatible string: E. g. the board code in
859 * ft_board_setup() could use:
861 * struct node_info nodes[] = {
862 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
863 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
866 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
868 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
870 struct node_info *ni = node_info;
871 struct mtd_device *dev;
876 parts = getenv("mtdparts");
880 if (mtdparts_init() != 0)
883 for (i = 0; i < node_info_size; i++) {
885 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
886 while (noff != -FDT_ERR_NOTFOUND) {
887 debug("%s: %s, mtd dev type %d\n",
888 fdt_get_name(blob, noff, 0),
889 ni[i].compat, ni[i].type);
890 dev = device_find(ni[i].type, idx++);
892 if (fdt_node_set_part_info(blob, noff, dev))
893 return; /* return on error */
896 /* Jump to next flash node */
897 noff = fdt_node_offset_by_compatible(blob, noff,
904 void fdt_del_node_and_alias(void *blob, const char *alias)
906 int off = fdt_path_offset(blob, alias);
911 fdt_del_node(blob, off);
913 off = fdt_path_offset(blob, "/aliases");
914 fdt_delprop(blob, off, alias);
919 /* Max address size we deal with */
920 #define OF_MAX_ADDR_CELLS 4
921 #define OF_BAD_ADDR ((u64)-1)
922 #define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
927 static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
931 printf(" %08x", *(addr++));
935 static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
938 /* Callbacks for bus specific translators */
941 const char *addresses;
942 void (*count_cells)(void *blob, int parentoffset,
943 int *addrc, int *sizec);
944 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
945 int na, int ns, int pna);
946 int (*translate)(fdt32_t *addr, u64 offset, int na);
949 /* Default translator (generic bus) */
950 void of_bus_default_count_cells(void *blob, int parentoffset,
951 int *addrc, int *sizec)
956 *addrc = fdt_address_cells(blob, parentoffset);
959 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
961 *sizec = be32_to_cpup(prop);
967 static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
968 int na, int ns, int pna)
972 cp = of_read_number(range, na);
973 s = of_read_number(range + na + pna, ns);
974 da = of_read_number(addr, na);
976 debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n",
979 if (da < cp || da >= (cp + s))
984 static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
986 u64 a = of_read_number(addr, na);
987 memset(addr, 0, na * 4);
990 addr[na - 2] = cpu_to_fdt32(a >> 32);
991 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
996 /* Array of bus specific translators */
997 static struct of_bus of_busses[] = {
1002 .count_cells = of_bus_default_count_cells,
1003 .map = of_bus_default_map,
1004 .translate = of_bus_default_translate,
1008 static int of_translate_one(void * blob, int parent, struct of_bus *bus,
1009 struct of_bus *pbus, fdt32_t *addr,
1010 int na, int ns, int pna, const char *rprop)
1012 const fdt32_t *ranges;
1015 u64 offset = OF_BAD_ADDR;
1017 /* Normally, an absence of a "ranges" property means we are
1018 * crossing a non-translatable boundary, and thus the addresses
1019 * below the current not cannot be converted to CPU physical ones.
1020 * Unfortunately, while this is very clear in the spec, it's not
1021 * what Apple understood, and they do have things like /uni-n or
1022 * /ht nodes with no "ranges" property and a lot of perfectly
1023 * useable mapped devices below them. Thus we treat the absence of
1024 * "ranges" as equivalent to an empty "ranges" property which means
1025 * a 1:1 translation at that level. It's up to the caller not to try
1026 * to translate addresses that aren't supposed to be translated in
1027 * the first place. --BenH.
1029 ranges = fdt_getprop(blob, parent, rprop, &rlen);
1030 if (ranges == NULL || rlen == 0) {
1031 offset = of_read_number(addr, na);
1032 memset(addr, 0, pna * 4);
1033 debug("OF: no ranges, 1:1 translation\n");
1037 debug("OF: walking ranges...\n");
1039 /* Now walk through the ranges */
1041 rone = na + pna + ns;
1042 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1043 offset = bus->map(addr, ranges, na, ns, pna);
1044 if (offset != OF_BAD_ADDR)
1047 if (offset == OF_BAD_ADDR) {
1048 debug("OF: not found !\n");
1051 memcpy(addr, ranges + na, 4 * pna);
1054 of_dump_addr("OF: parent translation for:", addr, pna);
1055 debug("OF: with offset: "PRu64"\n", offset);
1057 /* Translate it into parent bus space */
1058 return pbus->translate(addr, offset, pna);
1062 * Translate an address from the device-tree into a CPU physical address,
1063 * this walks up the tree and applies the various bus mappings on the
1066 * Note: We consider that crossing any level with #size-cells == 0 to mean
1067 * that translation is impossible (that is we are not dealing with a value
1068 * that can be mapped to a cpu physical address). This is not really specified
1069 * that way, but this is traditionally the way IBM at least do things
1071 static u64 __of_translate_address(void *blob, int node_offset, const fdt32_t *in_addr,
1075 struct of_bus *bus, *pbus;
1076 fdt32_t addr[OF_MAX_ADDR_CELLS];
1077 int na, ns, pna, pns;
1078 u64 result = OF_BAD_ADDR;
1080 debug("OF: ** translation for device %s **\n",
1081 fdt_get_name(blob, node_offset, NULL));
1083 /* Get parent & match bus type */
1084 parent = fdt_parent_offset(blob, node_offset);
1087 bus = &of_busses[0];
1089 /* Cound address cells & copy address locally */
1090 bus->count_cells(blob, parent, &na, &ns);
1091 if (!OF_CHECK_COUNTS(na, ns)) {
1092 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1093 fdt_get_name(blob, node_offset, NULL));
1096 memcpy(addr, in_addr, na * 4);
1098 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1099 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1100 of_dump_addr("OF: translating address:", addr, na);
1104 /* Switch to parent bus */
1105 node_offset = parent;
1106 parent = fdt_parent_offset(blob, node_offset);
1108 /* If root, we have finished */
1110 debug("OF: reached root node\n");
1111 result = of_read_number(addr, na);
1115 /* Get new parent bus and counts */
1116 pbus = &of_busses[0];
1117 pbus->count_cells(blob, parent, &pna, &pns);
1118 if (!OF_CHECK_COUNTS(pna, pns)) {
1119 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1120 fdt_get_name(blob, node_offset, NULL));
1124 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1125 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1127 /* Apply bus translation */
1128 if (of_translate_one(blob, node_offset, bus, pbus,
1129 addr, na, ns, pna, rprop))
1132 /* Complete the move up one level */
1137 of_dump_addr("OF: one level translation:", addr, na);
1144 u64 fdt_translate_address(void *blob, int node_offset, const fdt32_t *in_addr)
1146 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1150 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1151 * who's reg property matches a physical cpu address
1153 * @blob: ptr to device tree
1154 * @compat: compatiable string to match
1155 * @compat_off: property name
1158 int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1159 phys_addr_t compat_off)
1161 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1162 while (off != -FDT_ERR_NOTFOUND) {
1163 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
1165 if (compat_off == fdt_translate_address(blob, off, reg))
1168 off = fdt_node_offset_by_compatible(blob, off, compat);
1171 return -FDT_ERR_NOTFOUND;
1175 * fdt_alloc_phandle: Return next free phandle value
1177 * @blob: ptr to device tree
1179 int fdt_alloc_phandle(void *blob)
1182 uint32_t 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 naddr = fdt_address_cells(fdt, node);
1404 prop = fdt_getprop(fdt, node, "ranges", &size);
1406 return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0;
1410 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1412 static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1413 uint64_t *val, int cells)
1415 const fdt32_t *prop32 = &prop[cell_off];
1416 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];
1418 if ((cell_off + cells) > prop_len)
1419 return -FDT_ERR_NOSPACE;
1423 *val = fdt32_to_cpu(*prop32);
1426 *val = fdt64_to_cpu(*prop64);
1429 return -FDT_ERR_NOSPACE;
1436 * fdt_read_range - Read a node's n'th range property
1438 * @fdt: ptr to device tree
1439 * @node: offset of node
1441 * @child_addr: pointer to storage for the "child address" field
1442 * @addr: pointer to storage for the CPU view translated physical start
1443 * @len: pointer to storage for the range length
1445 * Convenience function that reads and interprets a specific range out of
1446 * a number of the "ranges" property array.
1448 int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1449 uint64_t *addr, uint64_t *len)
1451 int pnode = fdt_parent_offset(fdt, node);
1452 const fdt32_t *ranges;
1461 * The "ranges" property is an array of
1462 * { <child address> <parent address> <size in child address space> }
1464 * All 3 elements can span a diffent number of cells. Fetch their size.
1466 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1467 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1468 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1470 /* Now try to get the ranges property */
1471 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1473 return -FDT_ERR_NOTFOUND;
1474 ranges_len /= sizeof(uint32_t);
1476 /* Jump to the n'th entry */
1477 cell = n * (pacells + acells + scells);
1479 /* Read <child address> */
1481 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1488 /* Read <parent address> */
1490 *addr = fdt_translate_address(fdt, node, ranges + cell);
1493 /* Read <size in child address space> */
1495 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
1504 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1506 * @fdt: ptr to device tree
1507 * @node: offset of the simplefb node
1508 * @base_address: framebuffer base address
1509 * @width: width in pixels
1510 * @height: height in pixels
1511 * @stride: bytes per line
1512 * @format: pixel format string
1514 * Convenience function to fill and enable a simplefb node.
1516 int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
1517 u32 height, u32 stride, const char *format)
1521 int i, addrc, sizec, ret;
1523 of_bus_default_count_cells(fdt, fdt_parent_offset(fdt, node),
1527 cells[i++] = cpu_to_fdt32(base_address >> 32);
1528 cells[i++] = cpu_to_fdt32(base_address);
1531 cells[i++] = cpu_to_fdt32(height * stride);
1533 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
1537 snprintf(name, sizeof(name), "framebuffer@%llx", base_address);
1538 ret = fdt_set_name(fdt, node, name);
1542 ret = fdt_setprop_u32(fdt, node, "width", width);
1546 ret = fdt_setprop_u32(fdt, node, "height", height);
1550 ret = fdt_setprop_u32(fdt, node, "stride", stride);
1554 ret = fdt_setprop_string(fdt, node, "format", format);
1558 ret = fdt_setprop_string(fdt, node, "status", "okay");