3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
5 * See file CREDITS for list of people who contributed to this
8 * This program is free software; you can redistribute it and/or
9 * modify it under the terms of the GNU General Public License as
10 * published by the Free Software Foundation; either version 2 of
11 * the License, or (at your option) any later version.
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
25 #include <stdio_dev.h>
26 #include <linux/ctype.h>
27 #include <linux/types.h>
28 #include <asm/global_data.h>
31 #include <fdt_support.h>
35 * Global data (for the gd->bd)
37 DECLARE_GLOBAL_DATA_PTR;
40 * fdt_getprop_u32_default - Find a node and return it's property or a default
42 * @fdt: ptr to device tree
44 * @prop: property name
45 * @dflt: default value if the property isn't found
47 * Convenience function to find a node and return it's property or a
48 * default value if it doesn't exist.
50 u32 fdt_getprop_u32_default(void *fdt, const char *path, const char *prop,
56 off = fdt_path_offset(fdt, path);
60 val = fdt_getprop(fdt, off, prop, NULL);
68 * fdt_find_and_setprop: Find a node and set it's property
70 * @fdt: ptr to device tree
72 * @prop: property name
73 * @val: ptr to new value
74 * @len: length of new property value
75 * @create: flag to create the property if it doesn't exist
77 * Convenience function to directly set a property given the path to the node.
79 int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
80 const void *val, int len, int create)
82 int nodeoff = fdt_path_offset(fdt, node);
87 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, 0) == NULL))
88 return 0; /* create flag not set; so exit quietly */
90 return fdt_setprop(fdt, nodeoff, prop, val, len);
93 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS
95 #ifdef CONFIG_SERIAL_MULTI
96 static void fdt_fill_multisername(char *sername, size_t maxlen)
98 const char *outname = stdio_devices[stdout]->name;
100 if (strcmp(outname, "serial") > 0)
101 strncpy(sername, outname, maxlen);
104 if (strcmp(outname + 1, "serial") > 0)
105 strncpy(sername, outname + 1, maxlen);
108 static inline void fdt_fill_multisername(char *sername, size_t maxlen) {}
109 #endif /* CONFIG_SERIAL_MULTI */
111 static int fdt_fixup_stdout(void *fdt, int chosenoff)
114 #ifdef CONFIG_CONS_INDEX
116 char sername[9] = { 0 };
119 fdt_fill_multisername(sername, sizeof(sername) - 1);
121 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
123 err = node = fdt_path_offset(fdt, "/aliases");
126 path = fdt_getprop(fdt, node, sername, &len);
128 char *p = malloc(len);
129 err = -FDT_ERR_NOSPACE;
131 memcpy(p, path, len);
132 err = fdt_setprop(fdt, chosenoff,
133 "linux,stdout-path", p, len);
142 printf("WARNING: could not set linux,stdout-path %s.\n",
149 int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force)
157 /* Find the "chosen" node. */
158 nodeoffset = fdt_path_offset (fdt, "/chosen");
160 /* If there is no "chosen" node in the blob return */
161 if (nodeoffset < 0) {
162 printf("fdt_initrd: %s\n", fdt_strerror(nodeoffset));
166 /* just return if initrd_start/end aren't valid */
167 if ((initrd_start == 0) || (initrd_end == 0))
170 total = fdt_num_mem_rsv(fdt);
173 * Look for an existing entry and update it. If we don't find
174 * the entry, we will j be the next available slot.
176 for (j = 0; j < total; j++) {
177 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
178 if (addr == initrd_start) {
179 fdt_del_mem_rsv(fdt, j);
184 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start + 1);
186 printf("fdt_initrd: %s\n", fdt_strerror(err));
190 path = fdt_getprop(fdt, nodeoffset, "linux,initrd-start", NULL);
191 if ((path == NULL) || force) {
192 tmp = __cpu_to_be32(initrd_start);
193 err = fdt_setprop(fdt, nodeoffset,
194 "linux,initrd-start", &tmp, sizeof(tmp));
197 "could not set linux,initrd-start %s.\n",
201 tmp = __cpu_to_be32(initrd_end);
202 err = fdt_setprop(fdt, nodeoffset,
203 "linux,initrd-end", &tmp, sizeof(tmp));
205 printf("WARNING: could not set linux,initrd-end %s.\n",
215 int fdt_chosen(void *fdt, int force)
219 char *str; /* used to set string properties */
222 err = fdt_check_header(fdt);
224 printf("fdt_chosen: %s\n", fdt_strerror(err));
229 * Find the "chosen" node.
231 nodeoffset = fdt_path_offset (fdt, "/chosen");
234 * If there is no "chosen" node in the blob, create it.
236 if (nodeoffset < 0) {
238 * Create a new node "/chosen" (offset 0 is root level)
240 nodeoffset = fdt_add_subnode(fdt, 0, "chosen");
241 if (nodeoffset < 0) {
242 printf("WARNING: could not create /chosen %s.\n",
243 fdt_strerror(nodeoffset));
249 * Create /chosen properites that don't exist in the fdt.
250 * If the property exists, update it only if the "force" parameter
253 str = getenv("bootargs");
255 path = fdt_getprop(fdt, nodeoffset, "bootargs", NULL);
256 if ((path == NULL) || force) {
257 err = fdt_setprop(fdt, nodeoffset,
258 "bootargs", str, strlen(str)+1);
260 printf("WARNING: could not set bootargs %s.\n",
265 #ifdef CONFIG_OF_STDOUT_VIA_ALIAS
266 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
267 if ((path == NULL) || force)
268 err = fdt_fixup_stdout(fdt, nodeoffset);
271 #ifdef OF_STDOUT_PATH
272 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
273 if ((path == NULL) || force) {
274 err = fdt_setprop(fdt, nodeoffset,
275 "linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1);
277 printf("WARNING: could not set linux,stdout-path %s.\n",
285 void do_fixup_by_path(void *fdt, const char *path, const char *prop,
286 const void *val, int len, int create)
290 debug("Updating property '%s/%s' = ", path, prop);
291 for (i = 0; i < len; i++)
292 debug(" %.2x", *(u8*)(val+i));
295 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
297 printf("Unable to update property %s:%s, err=%s\n",
298 path, prop, fdt_strerror(rc));
301 void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
304 val = cpu_to_fdt32(val);
305 do_fixup_by_path(fdt, path, prop, &val, sizeof(val), create);
308 void do_fixup_by_prop(void *fdt,
309 const char *pname, const void *pval, int plen,
310 const char *prop, const void *val, int len,
316 debug("Updating property '%s' = ", prop);
317 for (i = 0; i < len; i++)
318 debug(" %.2x", *(u8*)(val+i));
321 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
322 while (off != -FDT_ERR_NOTFOUND) {
323 if (create || (fdt_get_property(fdt, off, prop, 0) != NULL))
324 fdt_setprop(fdt, off, prop, val, len);
325 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
329 void do_fixup_by_prop_u32(void *fdt,
330 const char *pname, const void *pval, int plen,
331 const char *prop, u32 val, int create)
333 val = cpu_to_fdt32(val);
334 do_fixup_by_prop(fdt, pname, pval, plen, prop, &val, 4, create);
337 void do_fixup_by_compat(void *fdt, const char *compat,
338 const char *prop, const void *val, int len, int create)
343 debug("Updating property '%s' = ", prop);
344 for (i = 0; i < len; i++)
345 debug(" %.2x", *(u8*)(val+i));
348 off = fdt_node_offset_by_compatible(fdt, -1, compat);
349 while (off != -FDT_ERR_NOTFOUND) {
350 if (create || (fdt_get_property(fdt, off, prop, 0) != NULL))
351 fdt_setprop(fdt, off, prop, val, len);
352 off = fdt_node_offset_by_compatible(fdt, off, compat);
356 void do_fixup_by_compat_u32(void *fdt, const char *compat,
357 const char *prop, u32 val, int create)
359 val = cpu_to_fdt32(val);
360 do_fixup_by_compat(fdt, compat, prop, &val, 4, create);
363 int fdt_fixup_memory(void *blob, u64 start, u64 size)
365 int err, nodeoffset, len = 0;
367 const u32 *addrcell, *sizecell;
369 err = fdt_check_header(blob);
371 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
375 /* update, or add and update /memory node */
376 nodeoffset = fdt_path_offset(blob, "/memory");
377 if (nodeoffset < 0) {
378 nodeoffset = fdt_add_subnode(blob, 0, "memory");
380 printf("WARNING: could not create /memory: %s.\n",
381 fdt_strerror(nodeoffset));
384 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
387 printf("WARNING: could not set %s %s.\n", "device_type",
392 addrcell = fdt_getprop(blob, 0, "#address-cells", NULL);
393 /* use shifts and mask to ensure endianness */
394 if ((addrcell) && (*addrcell == 2)) {
395 tmp[0] = (start >> 56) & 0xff;
396 tmp[1] = (start >> 48) & 0xff;
397 tmp[2] = (start >> 40) & 0xff;
398 tmp[3] = (start >> 32) & 0xff;
399 tmp[4] = (start >> 24) & 0xff;
400 tmp[5] = (start >> 16) & 0xff;
401 tmp[6] = (start >> 8) & 0xff;
402 tmp[7] = (start ) & 0xff;
405 tmp[0] = (start >> 24) & 0xff;
406 tmp[1] = (start >> 16) & 0xff;
407 tmp[2] = (start >> 8) & 0xff;
408 tmp[3] = (start ) & 0xff;
412 sizecell = fdt_getprop(blob, 0, "#size-cells", NULL);
413 /* use shifts and mask to ensure endianness */
414 if ((sizecell) && (*sizecell == 2)) {
415 tmp[0+len] = (size >> 56) & 0xff;
416 tmp[1+len] = (size >> 48) & 0xff;
417 tmp[2+len] = (size >> 40) & 0xff;
418 tmp[3+len] = (size >> 32) & 0xff;
419 tmp[4+len] = (size >> 24) & 0xff;
420 tmp[5+len] = (size >> 16) & 0xff;
421 tmp[6+len] = (size >> 8) & 0xff;
422 tmp[7+len] = (size ) & 0xff;
425 tmp[0+len] = (size >> 24) & 0xff;
426 tmp[1+len] = (size >> 16) & 0xff;
427 tmp[2+len] = (size >> 8) & 0xff;
428 tmp[3+len] = (size ) & 0xff;
432 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
434 printf("WARNING: could not set %s %s.\n",
435 "reg", fdt_strerror(err));
441 void fdt_fixup_ethernet(void *fdt)
444 char enet[16], *tmp, *end;
445 char mac[16] = "ethaddr";
447 unsigned char mac_addr[6];
449 node = fdt_path_offset(fdt, "/aliases");
454 while ((tmp = getenv(mac)) != NULL) {
455 sprintf(enet, "ethernet%d", i);
456 path = fdt_getprop(fdt, node, enet, NULL);
458 debug("No alias for %s\n", enet);
459 sprintf(mac, "eth%daddr", ++i);
463 for (j = 0; j < 6; j++) {
464 mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
466 tmp = (*end) ? end+1 : end;
469 do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0);
470 do_fixup_by_path(fdt, path, "local-mac-address",
473 sprintf(mac, "eth%daddr", ++i);
477 /* Resize the fdt to its actual size + a bit of padding */
478 int fdt_resize(void *blob)
488 total = fdt_num_mem_rsv(blob);
489 for (i = 0; i < total; i++) {
490 fdt_get_mem_rsv(blob, i, &addr, &size);
491 if (addr == (uint64_t)(u32)blob) {
492 fdt_del_mem_rsv(blob, i);
498 * Calculate the actual size of the fdt
499 * plus the size needed for two fdt_add_mem_rsv, one
500 * for the fdt itself and one for a possible initrd
502 actualsize = fdt_off_dt_strings(blob) +
503 fdt_size_dt_strings(blob) + 2*sizeof(struct fdt_reserve_entry);
505 /* Make it so the fdt ends on a page boundary */
506 actualsize = ALIGN(actualsize + ((uint)blob & 0xfff), 0x1000);
507 actualsize = actualsize - ((uint)blob & 0xfff);
509 /* Change the fdt header to reflect the correct size */
510 fdt_set_totalsize(blob, actualsize);
512 /* Add the new reservation */
513 ret = fdt_add_mem_rsv(blob, (uint)blob, actualsize);
521 #define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
523 #define FDT_PCI_PREFETCH (0x40000000)
524 #define FDT_PCI_MEM32 (0x02000000)
525 #define FDT_PCI_IO (0x01000000)
526 #define FDT_PCI_MEM64 (0x03000000)
528 int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
530 int addrcell, sizecell, len, r;
532 /* sized based on pci addr cells, size-cells, & address-cells */
533 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
535 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
536 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
538 dma_range = &dma_ranges[0];
539 for (r = 0; r < hose->region_count; r++) {
540 u64 bus_start, phys_start, size;
542 /* skip if !PCI_REGION_SYS_MEMORY */
543 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
546 bus_start = (u64)hose->regions[r].bus_start;
547 phys_start = (u64)hose->regions[r].phys_start;
548 size = (u64)hose->regions[r].size;
551 if (size >= 0x100000000ull)
552 dma_range[0] |= FDT_PCI_MEM64;
554 dma_range[0] |= FDT_PCI_MEM32;
555 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
556 dma_range[0] |= FDT_PCI_PREFETCH;
557 #ifdef CONFIG_SYS_PCI_64BIT
558 dma_range[1] = bus_start >> 32;
562 dma_range[2] = bus_start & 0xffffffff;
565 dma_range[3] = phys_start >> 32;
566 dma_range[4] = phys_start & 0xffffffff;
568 dma_range[3] = phys_start & 0xffffffff;
572 dma_range[3 + addrcell + 0] = size >> 32;
573 dma_range[3 + addrcell + 1] = size & 0xffffffff;
575 dma_range[3 + addrcell + 0] = size & 0xffffffff;
578 dma_range += (3 + addrcell + sizecell);
581 len = dma_range - &dma_ranges[0];
583 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
589 #ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
591 * This function can be used to update the size in the "reg" property
592 * of the NOR FLASH device nodes. This is necessary for boards with
593 * non-fixed NOR FLASH sizes.
595 int fdt_fixup_nor_flash_size(void *blob, int cs, u32 size)
597 char compat[][16] = { "cfi-flash", "jedec-flash" };
600 struct fdt_property *prop;
604 for (i = 0; i < 2; i++) {
605 off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
606 while (off != -FDT_ERR_NOTFOUND) {
608 * Found one compatible node, now check if this one
611 prop = fdt_get_property_w(blob, off, "reg", &len);
613 reg = (u32 *)&prop->data[0];
616 fdt_setprop(blob, off, "reg", reg,
623 /* Move to next compatible node */
624 off = fdt_node_offset_by_compatible(blob, off,
633 #ifdef CONFIG_FDT_FIXUP_PARTITIONS
634 #include <jffs2/load_kernel.h>
635 #include <mtd_node.h>
642 int fdt_del_subnodes(const void *blob, int parent_offset)
647 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
648 (off >= 0) && (ndepth > 0);
649 off = fdt_next_node(blob, off, &ndepth)) {
651 debug("delete %s: offset: %x\n",
652 fdt_get_name(blob, off, 0), off);
653 ret = fdt_del_node((void *)blob, off);
655 printf("Can't delete node: %s\n",
667 int fdt_increase_size(void *fdt, int add_len)
671 newlen = fdt_totalsize(fdt) + add_len;
673 /* Open in place with a new len */
674 return fdt_open_into(fdt, fdt, newlen);
677 int fdt_del_partitions(void *blob, int parent_offset)
684 off = fdt_next_node(blob, parent_offset, &ndepth);
685 if (off > 0 && ndepth == 1) {
686 prop = fdt_getprop(blob, off, "label", NULL);
689 * Could not find label property, nand {}; node?
690 * Check subnode, delete partitions there if any.
692 return fdt_del_partitions(blob, off);
694 ret = fdt_del_subnodes(blob, parent_offset);
696 printf("Can't remove subnodes: %s\n",
705 int fdt_node_set_part_info(void *blob, int parent_offset,
706 struct mtd_device *dev)
708 struct list_head *pentry;
709 struct part_info *part;
710 struct reg_cell cell;
715 ret = fdt_del_partitions(blob, parent_offset);
720 * Check if it is nand {}; subnode, adjust
721 * the offset in this case
723 off = fdt_next_node(blob, parent_offset, &ndepth);
724 if (off > 0 && ndepth == 1)
728 list_for_each_prev(pentry, &dev->parts) {
731 part = list_entry(pentry, struct part_info, link);
733 debug("%2d: %-20s0x%08x\t0x%08x\t%d\n",
734 part_num, part->name, part->size,
735 part->offset, part->mask_flags);
737 sprintf(buf, "partition@%x", part->offset);
739 ret = fdt_add_subnode(blob, parent_offset, buf);
740 if (ret == -FDT_ERR_NOSPACE) {
741 ret = fdt_increase_size(blob, 512);
746 } else if (ret < 0) {
747 printf("Can't add partition node: %s\n",
753 /* Check MTD_WRITEABLE_CMD flag */
754 if (part->mask_flags & 1) {
756 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
757 if (ret == -FDT_ERR_NOSPACE) {
758 ret = fdt_increase_size(blob, 512);
767 cell.r0 = cpu_to_fdt32(part->offset);
768 cell.r1 = cpu_to_fdt32(part->size);
770 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
771 if (ret == -FDT_ERR_NOSPACE) {
772 ret = fdt_increase_size(blob, 512);
781 ret = fdt_setprop_string(blob, newoff, "label", part->name);
782 if (ret == -FDT_ERR_NOSPACE) {
783 ret = fdt_increase_size(blob, 512);
795 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
798 printf("Can't add property: %s\n", fdt_strerror(ret));
803 * Update partitions in nor/nand nodes using info from
804 * mtdparts environment variable. The nodes to update are
805 * specified by node_info structure which contains mtd device
806 * type and compatible string: E. g. the board code in
807 * ft_board_setup() could use:
809 * struct node_info nodes[] = {
810 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
811 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
814 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
816 void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
818 struct node_info *ni = node_info;
819 struct mtd_device *dev;
824 parts = getenv("mtdparts");
828 if (mtdparts_init() != 0)
831 for (i = 0; i < node_info_size; i++) {
833 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
834 while (noff != -FDT_ERR_NOTFOUND) {
835 debug("%s: %s, mtd dev type %d\n",
836 fdt_get_name(blob, noff, 0),
837 ni[i].compat, ni[i].type);
838 dev = device_find(ni[i].type, idx++);
840 if (fdt_node_set_part_info(blob, noff, dev))
841 return; /* return on error */
844 /* Jump to next flash node */
845 noff = fdt_node_offset_by_compatible(blob, noff,
852 void fdt_del_node_and_alias(void *blob, const char *alias)
854 int off = fdt_path_offset(blob, alias);
859 fdt_del_node(blob, off);
861 off = fdt_path_offset(blob, "/aliases");
862 fdt_delprop(blob, off, alias);