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64dbbd40
GVB
1/*
2 * (C) Copyright 2007
3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
4 *
2a523f52 5 * Copyright 2010-2011 Freescale Semiconductor, Inc.
a0342c08 6 *
1a459660 7 * SPDX-License-Identifier: GPL-2.0+
64dbbd40
GVB
8 */
9
10#include <common.h>
e48f3741 11#include <inttypes.h>
3e303f74 12#include <stdio_dev.h>
64dbbd40
GVB
13#include <linux/ctype.h>
14#include <linux/types.h>
64dbbd40 15#include <asm/global_data.h>
64dbbd40
GVB
16#include <libfdt.h>
17#include <fdt_support.h>
151c8b09 18#include <exports.h>
64dbbd40 19
94fb182c
AG
20/**
21 * fdt_getprop_u32_default_node - Return a node's property or a default
22 *
23 * @fdt: ptr to device tree
24 * @off: offset of node
25 * @cell: cell offset in property
26 * @prop: property name
27 * @dflt: default value if the property isn't found
28 *
29 * Convenience function to return a node's property or a default value if
30 * the property doesn't exist.
31 */
32u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
33 const char *prop, const u32 dflt)
34{
35 const fdt32_t *val;
36 int len;
37
38 val = fdt_getprop(fdt, off, prop, &len);
39
40 /* Check if property exists */
41 if (!val)
42 return dflt;
43
44 /* Check if property is long enough */
45 if (len < ((cell + 1) * sizeof(uint32_t)))
46 return dflt;
47
48 return fdt32_to_cpu(*val);
49}
50
3bed2aaf
KG
51/**
52 * fdt_getprop_u32_default - Find a node and return it's property or a default
53 *
54 * @fdt: ptr to device tree
55 * @path: path of node
56 * @prop: property name
57 * @dflt: default value if the property isn't found
58 *
59 * Convenience function to find a node and return it's property or a
60 * default value if it doesn't exist.
61 */
07e12784
GB
62u32 fdt_getprop_u32_default(const void *fdt, const char *path,
63 const char *prop, const u32 dflt)
3bed2aaf 64{
3bed2aaf
KG
65 int off;
66
67 off = fdt_path_offset(fdt, path);
68 if (off < 0)
69 return dflt;
70
94fb182c 71 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt);
3bed2aaf 72}
64dbbd40 73
a3c2933e
KG
74/**
75 * fdt_find_and_setprop: Find a node and set it's property
76 *
77 * @fdt: ptr to device tree
78 * @node: path of node
79 * @prop: property name
80 * @val: ptr to new value
81 * @len: length of new property value
82 * @create: flag to create the property if it doesn't exist
83 *
84 * Convenience function to directly set a property given the path to the node.
85 */
86int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
87 const void *val, int len, int create)
88{
8d04f02f 89 int nodeoff = fdt_path_offset(fdt, node);
a3c2933e
KG
90
91 if (nodeoff < 0)
92 return nodeoff;
93
8aa5ec6e 94 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
a3c2933e
KG
95 return 0; /* create flag not set; so exit quietly */
96
97 return fdt_setprop(fdt, nodeoff, prop, val, len);
98}
99
8edb2192 100/**
a9e8e291
SG
101 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
102 *
8edb2192
MY
103 * @fdt: pointer to the device tree blob
104 * @parentoffset: structure block offset of a node
105 * @name: name of the subnode to locate
106 *
107 * fdt_subnode_offset() finds a subnode of the node with a given name.
108 * If the subnode does not exist, it will be created.
109 */
a9e8e291 110int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name)
8edb2192
MY
111{
112 int offset;
113
114 offset = fdt_subnode_offset(fdt, parentoffset, name);
115
116 if (offset == -FDT_ERR_NOTFOUND)
117 offset = fdt_add_subnode(fdt, parentoffset, name);
118
119 if (offset < 0)
120 printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset));
121
122 return offset;
123}
124
972f2a89
MY
125/* rename to CONFIG_OF_STDOUT_PATH ? */
126#if defined(OF_STDOUT_PATH)
127static int fdt_fixup_stdout(void *fdt, int chosenoff)
128{
129 return fdt_setprop(fdt, chosenoff, "linux,stdout-path",
130 OF_STDOUT_PATH, strlen(OF_STDOUT_PATH) + 1);
131}
132#elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
3e303f74
AV
133static void fdt_fill_multisername(char *sername, size_t maxlen)
134{
135 const char *outname = stdio_devices[stdout]->name;
136
137 if (strcmp(outname, "serial") > 0)
138 strncpy(sername, outname, maxlen);
139
140 /* eserial? */
141 if (strcmp(outname + 1, "serial") > 0)
142 strncpy(sername, outname + 1, maxlen);
143}
3e303f74 144
40777812 145static int fdt_fixup_stdout(void *fdt, int chosenoff)
151c8b09 146{
972f2a89
MY
147 int err;
148 int aliasoff;
151c8b09 149 char sername[9] = { 0 };
972f2a89
MY
150 const void *path;
151 int len;
152 char tmp[256]; /* long enough */
151c8b09 153
3e303f74
AV
154 fdt_fill_multisername(sername, sizeof(sername) - 1);
155 if (!sername[0])
156 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
151c8b09 157
972f2a89
MY
158 aliasoff = fdt_path_offset(fdt, "/aliases");
159 if (aliasoff < 0) {
160 err = aliasoff;
161 goto error;
151c8b09 162 }
972f2a89
MY
163
164 path = fdt_getprop(fdt, aliasoff, sername, &len);
165 if (!path) {
166 err = len;
167 goto error;
168 }
169
170 /* fdt_setprop may break "path" so we copy it to tmp buffer */
171 memcpy(tmp, path, len);
172
173 err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len);
174error:
151c8b09
KG
175 if (err < 0)
176 printf("WARNING: could not set linux,stdout-path %s.\n",
972f2a89 177 fdt_strerror(err));
151c8b09
KG
178
179 return err;
180}
972f2a89
MY
181#else
182static int fdt_fixup_stdout(void *fdt, int chosenoff)
183{
184 return 0;
185}
151c8b09
KG
186#endif
187
f18295d3
MY
188static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name,
189 uint64_t val, int is_u64)
190{
191 if (is_u64)
192 return fdt_setprop_u64(fdt, nodeoffset, name, val);
193 else
194 return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val);
195}
196
10be5b5d
PK
197int fdt_root(void *fdt)
198{
199 char *serial;
200 int err;
201
202 err = fdt_check_header(fdt);
203 if (err < 0) {
204 printf("fdt_root: %s\n", fdt_strerror(err));
205 return err;
206 }
207
208 serial = getenv("serial#");
209 if (serial) {
210 err = fdt_setprop(fdt, 0, "serial-number", serial,
211 strlen(serial) + 1);
212
213 if (err < 0) {
214 printf("WARNING: could not set serial-number %s.\n",
215 fdt_strerror(err));
216 return err;
217 }
218 }
219
220 return 0;
221}
f18295d3 222
dbe963ae 223int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end)
64dbbd40 224{
f18295d3 225 int nodeoffset;
2a1a2cb6 226 int err, j, total;
f18295d3 227 int is_u64;
2a1a2cb6 228 uint64_t addr, size;
64dbbd40 229
50babaf8
MY
230 /* just return if the size of initrd is zero */
231 if (initrd_start == initrd_end)
232 return 0;
233
8edb2192
MY
234 /* find or create "/chosen" node. */
235 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
236 if (nodeoffset < 0)
2a1a2cb6 237 return nodeoffset;
64dbbd40 238
2a1a2cb6
KG
239 total = fdt_num_mem_rsv(fdt);
240
241 /*
242 * Look for an existing entry and update it. If we don't find
243 * the entry, we will j be the next available slot.
244 */
245 for (j = 0; j < total; j++) {
246 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
247 if (addr == initrd_start) {
248 fdt_del_mem_rsv(fdt, j);
249 break;
c28abb9c 250 }
2a1a2cb6 251 }
8d04f02f 252
ce6b27a8 253 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
2a1a2cb6
KG
254 if (err < 0) {
255 printf("fdt_initrd: %s\n", fdt_strerror(err));
256 return err;
257 }
258
933cdbb4 259 is_u64 = (fdt_address_cells(fdt, 0) == 2);
f18295d3
MY
260
261 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start",
262 (uint64_t)initrd_start, is_u64);
f77a606a 263
dbe963ae
MY
264 if (err < 0) {
265 printf("WARNING: could not set linux,initrd-start %s.\n",
266 fdt_strerror(err));
267 return err;
268 }
f18295d3
MY
269
270 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end",
271 (uint64_t)initrd_end, is_u64);
272
dbe963ae
MY
273 if (err < 0) {
274 printf("WARNING: could not set linux,initrd-end %s.\n",
275 fdt_strerror(err));
2a1a2cb6 276
dbe963ae 277 return err;
64dbbd40
GVB
278 }
279
2a1a2cb6
KG
280 return 0;
281}
282
bc6ed0f9 283int fdt_chosen(void *fdt)
2a1a2cb6
KG
284{
285 int nodeoffset;
286 int err;
287 char *str; /* used to set string properties */
2a1a2cb6
KG
288
289 err = fdt_check_header(fdt);
290 if (err < 0) {
291 printf("fdt_chosen: %s\n", fdt_strerror(err));
292 return err;
293 }
294
8edb2192
MY
295 /* find or create "/chosen" node. */
296 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
297 if (nodeoffset < 0)
298 return nodeoffset;
64dbbd40 299
64dbbd40 300 str = getenv("bootargs");
972f2a89
MY
301 if (str) {
302 err = fdt_setprop(fdt, nodeoffset, "bootargs", str,
303 strlen(str) + 1);
304 if (err < 0) {
bc6ed0f9
MY
305 printf("WARNING: could not set bootargs %s.\n",
306 fdt_strerror(err));
972f2a89
MY
307 return err;
308 }
64dbbd40 309 }
2a1a2cb6 310
972f2a89 311 return fdt_fixup_stdout(fdt, nodeoffset);
64dbbd40
GVB
312}
313
e93becf8
KG
314void do_fixup_by_path(void *fdt, const char *path, const char *prop,
315 const void *val, int len, int create)
316{
317#if defined(DEBUG)
318 int i;
d9ad115b 319 debug("Updating property '%s/%s' = ", path, prop);
e93becf8
KG
320 for (i = 0; i < len; i++)
321 debug(" %.2x", *(u8*)(val+i));
322 debug("\n");
323#endif
324 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
325 if (rc)
326 printf("Unable to update property %s:%s, err=%s\n",
327 path, prop, fdt_strerror(rc));
328}
329
330void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
331 u32 val, int create)
332{
8aa5ec6e
KP
333 fdt32_t tmp = cpu_to_fdt32(val);
334 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
e93becf8
KG
335}
336
9eb77cea
KG
337void do_fixup_by_prop(void *fdt,
338 const char *pname, const void *pval, int plen,
339 const char *prop, const void *val, int len,
340 int create)
341{
342 int off;
343#if defined(DEBUG)
344 int i;
d9ad115b 345 debug("Updating property '%s' = ", prop);
9eb77cea
KG
346 for (i = 0; i < len; i++)
347 debug(" %.2x", *(u8*)(val+i));
348 debug("\n");
349#endif
350 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
351 while (off != -FDT_ERR_NOTFOUND) {
8aa5ec6e 352 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
9eb77cea
KG
353 fdt_setprop(fdt, off, prop, val, len);
354 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
355 }
356}
357
358void do_fixup_by_prop_u32(void *fdt,
359 const char *pname, const void *pval, int plen,
360 const char *prop, u32 val, int create)
361{
8aa5ec6e
KP
362 fdt32_t tmp = cpu_to_fdt32(val);
363 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
9eb77cea
KG
364}
365
366void do_fixup_by_compat(void *fdt, const char *compat,
367 const char *prop, const void *val, int len, int create)
368{
369 int off = -1;
370#if defined(DEBUG)
371 int i;
d9ad115b 372 debug("Updating property '%s' = ", prop);
9eb77cea
KG
373 for (i = 0; i < len; i++)
374 debug(" %.2x", *(u8*)(val+i));
375 debug("\n");
376#endif
377 off = fdt_node_offset_by_compatible(fdt, -1, compat);
378 while (off != -FDT_ERR_NOTFOUND) {
8aa5ec6e 379 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
9eb77cea
KG
380 fdt_setprop(fdt, off, prop, val, len);
381 off = fdt_node_offset_by_compatible(fdt, off, compat);
382 }
383}
384
385void do_fixup_by_compat_u32(void *fdt, const char *compat,
386 const char *prop, u32 val, int create)
387{
8aa5ec6e
KP
388 fdt32_t tmp = cpu_to_fdt32(val);
389 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
9eb77cea
KG
390}
391
739a01ed
MY
392/*
393 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
394 */
41f09bbe
SG
395static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size,
396 int n)
739a01ed
MY
397{
398 int i;
ffccb84c
HG
399 int address_cells = fdt_address_cells(fdt, 0);
400 int size_cells = fdt_size_cells(fdt, 0);
739a01ed
MY
401 char *p = buf;
402
403 for (i = 0; i < n; i++) {
ffccb84c 404 if (address_cells == 2)
739a01ed
MY
405 *(fdt64_t *)p = cpu_to_fdt64(address[i]);
406 else
407 *(fdt32_t *)p = cpu_to_fdt32(address[i]);
ffccb84c 408 p += 4 * address_cells;
739a01ed 409
ffccb84c 410 if (size_cells == 2)
739a01ed
MY
411 *(fdt64_t *)p = cpu_to_fdt64(size[i]);
412 else
413 *(fdt32_t *)p = cpu_to_fdt32(size[i]);
ffccb84c 414 p += 4 * size_cells;
739a01ed
MY
415 }
416
417 return p - (char *)buf;
418}
419
5e574546
DA
420#ifdef CONFIG_NR_DRAM_BANKS
421#define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
422#else
8aa5ec6e 423#define MEMORY_BANKS_MAX 4
5e574546 424#endif
a6bd9e83
JR
425int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
426{
427 int err, nodeoffset;
739a01ed 428 int len;
8aa5ec6e 429 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
3c927281 430
8aa5ec6e
KP
431 if (banks > MEMORY_BANKS_MAX) {
432 printf("%s: num banks %d exceeds hardcoded limit %d."
433 " Recompile with higher MEMORY_BANKS_MAX?\n",
434 __FUNCTION__, banks, MEMORY_BANKS_MAX);
435 return -1;
436 }
437
3c927281
KG
438 err = fdt_check_header(blob);
439 if (err < 0) {
440 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
441 return err;
442 }
443
8edb2192
MY
444 /* find or create "/memory" node. */
445 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
446 if (nodeoffset < 0)
35940de1 447 return nodeoffset;
8edb2192 448
3c927281
KG
449 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
450 sizeof("memory"));
451 if (err < 0) {
452 printf("WARNING: could not set %s %s.\n", "device_type",
453 fdt_strerror(err));
454 return err;
455 }
456
5c1cf89f
AP
457 if (!banks)
458 return 0;
459
739a01ed 460 len = fdt_pack_reg(blob, tmp, start, size, banks);
3c927281
KG
461
462 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
463 if (err < 0) {
464 printf("WARNING: could not set %s %s.\n",
465 "reg", fdt_strerror(err));
466 return err;
467 }
468 return 0;
469}
470
a6bd9e83
JR
471int fdt_fixup_memory(void *blob, u64 start, u64 size)
472{
473 return fdt_fixup_memory_banks(blob, &start, &size, 1);
474}
475
ba37aa03 476void fdt_fixup_ethernet(void *fdt)
ab544633 477{
ba37aa03
KG
478 int node, i, j;
479 char enet[16], *tmp, *end;
064d55f8 480 char mac[16];
ab544633 481 const char *path;
ba37aa03 482 unsigned char mac_addr[6];
ab544633
KG
483
484 node = fdt_path_offset(fdt, "/aliases");
ba37aa03
KG
485 if (node < 0)
486 return;
487
b1f49ab8
DM
488 if (!getenv("ethaddr")) {
489 if (getenv("usbethaddr")) {
490 strcpy(mac, "usbethaddr");
491 } else {
492 debug("No ethernet MAC Address defined\n");
493 return;
494 }
495 } else {
496 strcpy(mac, "ethaddr");
497 }
498
ba37aa03
KG
499 i = 0;
500 while ((tmp = getenv(mac)) != NULL) {
501 sprintf(enet, "ethernet%d", i);
502 path = fdt_getprop(fdt, node, enet, NULL);
503 if (!path) {
504 debug("No alias for %s\n", enet);
505 sprintf(mac, "eth%daddr", ++i);
506 continue;
ab544633 507 }
ba37aa03
KG
508
509 for (j = 0; j < 6; j++) {
510 mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
511 if (tmp)
512 tmp = (*end) ? end+1 : end;
ab544633 513 }
ba37aa03
KG
514
515 do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0);
516 do_fixup_by_path(fdt, path, "local-mac-address",
517 &mac_addr, 6, 1);
518
519 sprintf(mac, "eth%daddr", ++i);
ab544633
KG
520 }
521}
18e69a35 522
3082d234 523/* Resize the fdt to its actual size + a bit of padding */
5bf58ccc 524int fdt_shrink_to_minimum(void *blob)
3082d234
KG
525{
526 int i;
527 uint64_t addr, size;
528 int total, ret;
529 uint actualsize;
530
531 if (!blob)
532 return 0;
533
534 total = fdt_num_mem_rsv(blob);
535 for (i = 0; i < total; i++) {
536 fdt_get_mem_rsv(blob, i, &addr, &size);
92549358 537 if (addr == (uintptr_t)blob) {
3082d234
KG
538 fdt_del_mem_rsv(blob, i);
539 break;
540 }
541 }
542
f242a088
PK
543 /*
544 * Calculate the actual size of the fdt
3840ebfa
FW
545 * plus the size needed for 5 fdt_add_mem_rsv, one
546 * for the fdt itself and 4 for a possible initrd
547 * ((initrd-start + initrd-end) * 2 (name & value))
f242a088 548 */
3082d234 549 actualsize = fdt_off_dt_strings(blob) +
3840ebfa 550 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
3082d234
KG
551
552 /* Make it so the fdt ends on a page boundary */
92549358
SG
553 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
554 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
3082d234
KG
555
556 /* Change the fdt header to reflect the correct size */
557 fdt_set_totalsize(blob, actualsize);
558
559 /* Add the new reservation */
92549358 560 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize);
3082d234
KG
561 if (ret < 0)
562 return ret;
563
564 return actualsize;
565}
8ab451c4
KG
566
567#ifdef CONFIG_PCI
cfd700be 568#define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
8ab451c4
KG
569
570#define FDT_PCI_PREFETCH (0x40000000)
571#define FDT_PCI_MEM32 (0x02000000)
572#define FDT_PCI_IO (0x01000000)
573#define FDT_PCI_MEM64 (0x03000000)
574
575int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
576
577 int addrcell, sizecell, len, r;
578 u32 *dma_range;
579 /* sized based on pci addr cells, size-cells, & address-cells */
580 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
581
582 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
583 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
584
585 dma_range = &dma_ranges[0];
586 for (r = 0; r < hose->region_count; r++) {
587 u64 bus_start, phys_start, size;
588
ff4e66e9
KG
589 /* skip if !PCI_REGION_SYS_MEMORY */
590 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
8ab451c4
KG
591 continue;
592
593 bus_start = (u64)hose->regions[r].bus_start;
594 phys_start = (u64)hose->regions[r].phys_start;
595 size = (u64)hose->regions[r].size;
596
597 dma_range[0] = 0;
cfd700be 598 if (size >= 0x100000000ull)
8ab451c4
KG
599 dma_range[0] |= FDT_PCI_MEM64;
600 else
601 dma_range[0] |= FDT_PCI_MEM32;
602 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
603 dma_range[0] |= FDT_PCI_PREFETCH;
604#ifdef CONFIG_SYS_PCI_64BIT
605 dma_range[1] = bus_start >> 32;
606#else
607 dma_range[1] = 0;
608#endif
609 dma_range[2] = bus_start & 0xffffffff;
610
611 if (addrcell == 2) {
612 dma_range[3] = phys_start >> 32;
613 dma_range[4] = phys_start & 0xffffffff;
614 } else {
615 dma_range[3] = phys_start & 0xffffffff;
616 }
617
618 if (sizecell == 2) {
619 dma_range[3 + addrcell + 0] = size >> 32;
620 dma_range[3 + addrcell + 1] = size & 0xffffffff;
621 } else {
622 dma_range[3 + addrcell + 0] = size & 0xffffffff;
623 }
624
625 dma_range += (3 + addrcell + sizecell);
626 }
627
628 len = dma_range - &dma_ranges[0];
629 if (len)
630 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
631
632 return 0;
633}
634#endif
30d45c0d
SR
635
636#ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
8a805df1
SR
637/*
638 * Provide a weak default function to return the flash bank size.
639 * There might be multiple non-identical flash chips connected to one
640 * chip-select, so we need to pass an index as well.
641 */
642u32 __flash_get_bank_size(int cs, int idx)
643{
644 extern flash_info_t flash_info[];
645
646 /*
647 * As default, a simple 1:1 mapping is provided. Boards with
648 * a different mapping need to supply a board specific mapping
649 * routine.
650 */
651 return flash_info[cs].size;
652}
653u32 flash_get_bank_size(int cs, int idx)
654 __attribute__((weak, alias("__flash_get_bank_size")));
655
30d45c0d
SR
656/*
657 * This function can be used to update the size in the "reg" property
8a805df1 658 * of all NOR FLASH device nodes. This is necessary for boards with
30d45c0d
SR
659 * non-fixed NOR FLASH sizes.
660 */
8a805df1 661int fdt_fixup_nor_flash_size(void *blob)
30d45c0d
SR
662{
663 char compat[][16] = { "cfi-flash", "jedec-flash" };
664 int off;
665 int len;
666 struct fdt_property *prop;
2778a014 667 u32 *reg, *reg2;
30d45c0d
SR
668 int i;
669
670 for (i = 0; i < 2; i++) {
671 off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
672 while (off != -FDT_ERR_NOTFOUND) {
8a805df1
SR
673 int idx;
674
30d45c0d 675 /*
8a805df1
SR
676 * Found one compatible node, so fixup the size
677 * int its reg properties
30d45c0d
SR
678 */
679 prop = fdt_get_property_w(blob, off, "reg", &len);
680 if (prop) {
8a805df1
SR
681 int tuple_size = 3 * sizeof(reg);
682
683 /*
684 * There might be multiple reg-tuples,
685 * so loop through them all
686 */
2778a014
SR
687 reg = reg2 = (u32 *)&prop->data[0];
688 for (idx = 0; idx < (len / tuple_size); idx++) {
8a805df1
SR
689 /*
690 * Update size in reg property
691 */
692 reg[2] = flash_get_bank_size(reg[0],
693 idx);
2778a014
SR
694
695 /*
696 * Point to next reg tuple
697 */
698 reg += 3;
30d45c0d 699 }
2778a014
SR
700
701 fdt_setprop(blob, off, "reg", reg2, len);
30d45c0d
SR
702 }
703
704 /* Move to next compatible node */
705 off = fdt_node_offset_by_compatible(blob, off,
706 compat[i]);
707 }
708 }
709
8a805df1 710 return 0;
30d45c0d
SR
711}
712#endif
3c950e2e 713
cb2707af
MM
714int fdt_increase_size(void *fdt, int add_len)
715{
716 int newlen;
717
718 newlen = fdt_totalsize(fdt) + add_len;
719
720 /* Open in place with a new len */
721 return fdt_open_into(fdt, fdt, newlen);
722}
723
3c950e2e
AG
724#ifdef CONFIG_FDT_FIXUP_PARTITIONS
725#include <jffs2/load_kernel.h>
726#include <mtd_node.h>
727
728struct reg_cell {
729 unsigned int r0;
730 unsigned int r1;
731};
732
733int fdt_del_subnodes(const void *blob, int parent_offset)
734{
735 int off, ndepth;
736 int ret;
737
738 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
739 (off >= 0) && (ndepth > 0);
740 off = fdt_next_node(blob, off, &ndepth)) {
741 if (ndepth == 1) {
742 debug("delete %s: offset: %x\n",
743 fdt_get_name(blob, off, 0), off);
744 ret = fdt_del_node((void *)blob, off);
745 if (ret < 0) {
746 printf("Can't delete node: %s\n",
747 fdt_strerror(ret));
748 return ret;
749 } else {
750 ndepth = 0;
751 off = parent_offset;
752 }
753 }
754 }
755 return 0;
756}
757
3c950e2e
AG
758int fdt_del_partitions(void *blob, int parent_offset)
759{
760 const void *prop;
761 int ndepth = 0;
762 int off;
763 int ret;
764
765 off = fdt_next_node(blob, parent_offset, &ndepth);
766 if (off > 0 && ndepth == 1) {
767 prop = fdt_getprop(blob, off, "label", NULL);
768 if (prop == NULL) {
769 /*
770 * Could not find label property, nand {}; node?
771 * Check subnode, delete partitions there if any.
772 */
773 return fdt_del_partitions(blob, off);
774 } else {
775 ret = fdt_del_subnodes(blob, parent_offset);
776 if (ret < 0) {
777 printf("Can't remove subnodes: %s\n",
778 fdt_strerror(ret));
779 return ret;
780 }
781 }
782 }
783 return 0;
784}
785
786int fdt_node_set_part_info(void *blob, int parent_offset,
787 struct mtd_device *dev)
788{
789 struct list_head *pentry;
790 struct part_info *part;
791 struct reg_cell cell;
792 int off, ndepth = 0;
793 int part_num, ret;
794 char buf[64];
795
796 ret = fdt_del_partitions(blob, parent_offset);
797 if (ret < 0)
798 return ret;
799
800 /*
801 * Check if it is nand {}; subnode, adjust
802 * the offset in this case
803 */
804 off = fdt_next_node(blob, parent_offset, &ndepth);
805 if (off > 0 && ndepth == 1)
806 parent_offset = off;
807
808 part_num = 0;
809 list_for_each_prev(pentry, &dev->parts) {
810 int newoff;
811
812 part = list_entry(pentry, struct part_info, link);
813
06503f16 814 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
3c950e2e
AG
815 part_num, part->name, part->size,
816 part->offset, part->mask_flags);
817
06503f16 818 sprintf(buf, "partition@%llx", part->offset);
3c950e2e
AG
819add_sub:
820 ret = fdt_add_subnode(blob, parent_offset, buf);
821 if (ret == -FDT_ERR_NOSPACE) {
822 ret = fdt_increase_size(blob, 512);
823 if (!ret)
824 goto add_sub;
825 else
826 goto err_size;
827 } else if (ret < 0) {
828 printf("Can't add partition node: %s\n",
829 fdt_strerror(ret));
830 return ret;
831 }
832 newoff = ret;
833
834 /* Check MTD_WRITEABLE_CMD flag */
835 if (part->mask_flags & 1) {
836add_ro:
837 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
838 if (ret == -FDT_ERR_NOSPACE) {
839 ret = fdt_increase_size(blob, 512);
840 if (!ret)
841 goto add_ro;
842 else
843 goto err_size;
844 } else if (ret < 0)
845 goto err_prop;
846 }
847
848 cell.r0 = cpu_to_fdt32(part->offset);
849 cell.r1 = cpu_to_fdt32(part->size);
850add_reg:
851 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
852 if (ret == -FDT_ERR_NOSPACE) {
853 ret = fdt_increase_size(blob, 512);
854 if (!ret)
855 goto add_reg;
856 else
857 goto err_size;
858 } else if (ret < 0)
859 goto err_prop;
860
861add_label:
862 ret = fdt_setprop_string(blob, newoff, "label", part->name);
863 if (ret == -FDT_ERR_NOSPACE) {
864 ret = fdt_increase_size(blob, 512);
865 if (!ret)
866 goto add_label;
867 else
868 goto err_size;
869 } else if (ret < 0)
870 goto err_prop;
871
872 part_num++;
873 }
874 return 0;
875err_size:
876 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
877 return ret;
878err_prop:
879 printf("Can't add property: %s\n", fdt_strerror(ret));
880 return ret;
881}
882
883/*
884 * Update partitions in nor/nand nodes using info from
885 * mtdparts environment variable. The nodes to update are
886 * specified by node_info structure which contains mtd device
887 * type and compatible string: E. g. the board code in
888 * ft_board_setup() could use:
889 *
890 * struct node_info nodes[] = {
891 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
892 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
893 * };
894 *
895 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
896 */
897void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
898{
899 struct node_info *ni = node_info;
900 struct mtd_device *dev;
901 char *parts;
902 int i, idx;
903 int noff;
904
905 parts = getenv("mtdparts");
906 if (!parts)
907 return;
908
909 if (mtdparts_init() != 0)
910 return;
911
912 for (i = 0; i < node_info_size; i++) {
913 idx = 0;
914 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
915 while (noff != -FDT_ERR_NOTFOUND) {
916 debug("%s: %s, mtd dev type %d\n",
917 fdt_get_name(blob, noff, 0),
918 ni[i].compat, ni[i].type);
919 dev = device_find(ni[i].type, idx++);
920 if (dev) {
921 if (fdt_node_set_part_info(blob, noff, dev))
922 return; /* return on error */
923 }
924
925 /* Jump to next flash node */
926 noff = fdt_node_offset_by_compatible(blob, noff,
927 ni[i].compat);
928 }
929 }
930}
931#endif
49b97d9c
KG
932
933void fdt_del_node_and_alias(void *blob, const char *alias)
934{
935 int off = fdt_path_offset(blob, alias);
936
937 if (off < 0)
938 return;
939
940 fdt_del_node(blob, off);
941
942 off = fdt_path_offset(blob, "/aliases");
943 fdt_delprop(blob, off, alias);
944}
a0342c08 945
a0342c08
KG
946/* Max address size we deal with */
947#define OF_MAX_ADDR_CELLS 4
948#define OF_BAD_ADDR ((u64)-1)
949#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
950 (ns) > 0)
951
952/* Debug utility */
953#ifdef DEBUG
8aa5ec6e 954static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
a0342c08
KG
955{
956 printf("%s", s);
957 while(na--)
958 printf(" %08x", *(addr++));
959 printf("\n");
960}
961#else
8aa5ec6e 962static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
a0342c08
KG
963#endif
964
965/* Callbacks for bus specific translators */
966struct of_bus {
967 const char *name;
968 const char *addresses;
6395f318 969 void (*count_cells)(void *blob, int parentoffset,
a0342c08 970 int *addrc, int *sizec);
8aa5ec6e 971 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
a0342c08 972 int na, int ns, int pna);
8aa5ec6e 973 int (*translate)(fdt32_t *addr, u64 offset, int na);
a0342c08
KG
974};
975
976/* Default translator (generic bus) */
f43b4356 977void of_bus_default_count_cells(void *blob, int parentoffset,
a0342c08
KG
978 int *addrc, int *sizec)
979{
8aa5ec6e 980 const fdt32_t *prop;
6395f318 981
933cdbb4
SG
982 if (addrc)
983 *addrc = fdt_address_cells(blob, parentoffset);
6395f318
SW
984
985 if (sizec) {
986 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
987 if (prop)
8aa5ec6e 988 *sizec = be32_to_cpup(prop);
6395f318
SW
989 else
990 *sizec = 1;
991 }
a0342c08
KG
992}
993
8aa5ec6e 994static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
a0342c08
KG
995 int na, int ns, int pna)
996{
997 u64 cp, s, da;
998
999 cp = of_read_number(range, na);
1000 s = of_read_number(range + na + pna, ns);
1001 da = of_read_number(addr, na);
1002
e48f3741
SG
1003 debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64
1004 ", da=%" PRIu64 "\n", cp, s, da);
a0342c08
KG
1005
1006 if (da < cp || da >= (cp + s))
1007 return OF_BAD_ADDR;
1008 return da - cp;
1009}
1010
8aa5ec6e 1011static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
a0342c08
KG
1012{
1013 u64 a = of_read_number(addr, na);
1014 memset(addr, 0, na * 4);
1015 a += offset;
1016 if (na > 1)
8aa5ec6e
KP
1017 addr[na - 2] = cpu_to_fdt32(a >> 32);
1018 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
a0342c08
KG
1019
1020 return 0;
1021}
1022
1023/* Array of bus specific translators */
1024static struct of_bus of_busses[] = {
1025 /* Default */
1026 {
1027 .name = "default",
1028 .addresses = "reg",
1029 .count_cells = of_bus_default_count_cells,
1030 .map = of_bus_default_map,
1031 .translate = of_bus_default_translate,
1032 },
1033};
1034
1035static int of_translate_one(void * blob, int parent, struct of_bus *bus,
8aa5ec6e 1036 struct of_bus *pbus, fdt32_t *addr,
a0342c08
KG
1037 int na, int ns, int pna, const char *rprop)
1038{
8aa5ec6e 1039 const fdt32_t *ranges;
a0342c08
KG
1040 int rlen;
1041 int rone;
1042 u64 offset = OF_BAD_ADDR;
1043
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.
1055 */
8aa5ec6e 1056 ranges = fdt_getprop(blob, parent, rprop, &rlen);
a0342c08
KG
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");
1061 goto finish;
1062 }
1063
1064 debug("OF: walking ranges...\n");
1065
1066 /* Now walk through the ranges */
1067 rlen /= 4;
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)
1072 break;
1073 }
1074 if (offset == OF_BAD_ADDR) {
1075 debug("OF: not found !\n");
1076 return 1;
1077 }
1078 memcpy(addr, ranges + na, 4 * pna);
1079
1080 finish:
1081 of_dump_addr("OF: parent translation for:", addr, pna);
e48f3741 1082 debug("OF: with offset: %" PRIu64 "\n", offset);
a0342c08
KG
1083
1084 /* Translate it into parent bus space */
1085 return pbus->translate(addr, offset, pna);
1086}
1087
1088/*
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
1091 * way.
1092 *
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
1097 */
8aa5ec6e
KP
1098static u64 __of_translate_address(void *blob, int node_offset, const fdt32_t *in_addr,
1099 const char *rprop)
a0342c08
KG
1100{
1101 int parent;
1102 struct of_bus *bus, *pbus;
8aa5ec6e 1103 fdt32_t addr[OF_MAX_ADDR_CELLS];
a0342c08
KG
1104 int na, ns, pna, pns;
1105 u64 result = OF_BAD_ADDR;
1106
1107 debug("OF: ** translation for device %s **\n",
1108 fdt_get_name(blob, node_offset, NULL));
1109
1110 /* Get parent & match bus type */
1111 parent = fdt_parent_offset(blob, node_offset);
1112 if (parent < 0)
1113 goto bail;
1114 bus = &of_busses[0];
1115
1116 /* Cound address cells & copy address locally */
6395f318 1117 bus->count_cells(blob, parent, &na, &ns);
a0342c08
KG
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));
1121 goto bail;
1122 }
1123 memcpy(addr, in_addr, na * 4);
1124
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);
1128
1129 /* Translate */
1130 for (;;) {
1131 /* Switch to parent bus */
1132 node_offset = parent;
1133 parent = fdt_parent_offset(blob, node_offset);
1134
1135 /* If root, we have finished */
1136 if (parent < 0) {
1137 debug("OF: reached root node\n");
1138 result = of_read_number(addr, na);
1139 break;
1140 }
1141
1142 /* Get new parent bus and counts */
1143 pbus = &of_busses[0];
6395f318 1144 pbus->count_cells(blob, parent, &pna, &pns);
a0342c08
KG
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));
1148 break;
1149 }
1150
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));
1153
1154 /* Apply bus translation */
1155 if (of_translate_one(blob, node_offset, bus, pbus,
1156 addr, na, ns, pna, rprop))
1157 break;
1158
1159 /* Complete the move up one level */
1160 na = pna;
1161 ns = pns;
1162 bus = pbus;
1163
1164 of_dump_addr("OF: one level translation:", addr, na);
1165 }
1166 bail:
1167
1168 return result;
1169}
1170
8aa5ec6e 1171u64 fdt_translate_address(void *blob, int node_offset, const fdt32_t *in_addr)
a0342c08
KG
1172{
1173 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1174}
75e73afd
KG
1175
1176/**
1177 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1178 * who's reg property matches a physical cpu address
1179 *
1180 * @blob: ptr to device tree
1181 * @compat: compatiable string to match
1182 * @compat_off: property name
1183 *
1184 */
1185int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1186 phys_addr_t compat_off)
1187{
1188 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1189 while (off != -FDT_ERR_NOTFOUND) {
8aa5ec6e 1190 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
75e73afd
KG
1191 if (reg) {
1192 if (compat_off == fdt_translate_address(blob, off, reg))
1193 return off;
1194 }
1195 off = fdt_node_offset_by_compatible(blob, off, compat);
1196 }
1197
1198 return -FDT_ERR_NOTFOUND;
1199}
1200
b4b847e9
KG
1201/**
1202 * fdt_alloc_phandle: Return next free phandle value
1203 *
1204 * @blob: ptr to device tree
1205 */
1206int fdt_alloc_phandle(void *blob)
1207{
b4141195
MY
1208 int offset;
1209 uint32_t phandle = 0;
b4b847e9
KG
1210
1211 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1212 offset = fdt_next_node(blob, offset, NULL)) {
50bf17bd 1213 phandle = max(phandle, fdt_get_phandle(blob, offset));
b4b847e9 1214 }
75e73afd 1215
b4b847e9
KG
1216 return phandle + 1;
1217}
beca5a5f 1218
a8d2a75d 1219/*
f117c0f0 1220 * fdt_set_phandle: Create a phandle property for the given node
a8d2a75d
GVB
1221 *
1222 * @fdt: ptr to device tree
1223 * @nodeoffset: node to update
1224 * @phandle: phandle value to set (must be unique)
f117c0f0
KG
1225 */
1226int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
a8d2a75d
GVB
1227{
1228 int ret;
1229
1230#ifdef DEBUG
1231 int off = fdt_node_offset_by_phandle(fdt, phandle);
1232
1233 if ((off >= 0) && (off != nodeoffset)) {
1234 char buf[64];
1235
1236 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1237 printf("Trying to update node %s with phandle %u ",
1238 buf, phandle);
1239
1240 fdt_get_path(fdt, off, buf, sizeof(buf));
1241 printf("that already exists in node %s.\n", buf);
1242 return -FDT_ERR_BADPHANDLE;
1243 }
1244#endif
1245
1246 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1247 if (ret < 0)
1248 return ret;
1249
1250 /*
1251 * For now, also set the deprecated "linux,phandle" property, so that we
1252 * don't break older kernels.
1253 */
1254 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1255
1256 return ret;
1257}
1258
10aeabd1
KG
1259/*
1260 * fdt_create_phandle: Create a phandle property for the given node
1261 *
1262 * @fdt: ptr to device tree
1263 * @nodeoffset: node to update
1264 */
3c927ccc 1265unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
10aeabd1
KG
1266{
1267 /* see if there is a phandle already */
1268 int phandle = fdt_get_phandle(fdt, nodeoffset);
1269
1270 /* if we got 0, means no phandle so create one */
1271 if (phandle == 0) {
3c927ccc
TT
1272 int ret;
1273
10aeabd1 1274 phandle = fdt_alloc_phandle(fdt);
3c927ccc
TT
1275 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1276 if (ret < 0) {
1277 printf("Can't set phandle %u: %s\n", phandle,
1278 fdt_strerror(ret));
1279 return 0;
1280 }
10aeabd1
KG
1281 }
1282
1283 return phandle;
1284}
1285
2a523f52
SL
1286/*
1287 * fdt_set_node_status: Set status for the given node
1288 *
1289 * @fdt: ptr to device tree
1290 * @nodeoffset: node to update
1291 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1292 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1293 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1294 */
1295int fdt_set_node_status(void *fdt, int nodeoffset,
1296 enum fdt_status status, unsigned int error_code)
1297{
1298 char buf[16];
1299 int ret = 0;
1300
1301 if (nodeoffset < 0)
1302 return nodeoffset;
1303
1304 switch (status) {
1305 case FDT_STATUS_OKAY:
1306 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1307 break;
1308 case FDT_STATUS_DISABLED:
1309 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1310 break;
1311 case FDT_STATUS_FAIL:
1312 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1313 break;
1314 case FDT_STATUS_FAIL_ERROR_CODE:
1315 sprintf(buf, "fail-%d", error_code);
1316 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1317 break;
1318 default:
1319 printf("Invalid fdt status: %x\n", status);
1320 ret = -1;
1321 break;
1322 }
1323
1324 return ret;
1325}
1326
1327/*
1328 * fdt_set_status_by_alias: Set status for the given node given an alias
1329 *
1330 * @fdt: ptr to device tree
1331 * @alias: alias of node to update
1332 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1333 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1334 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1335 */
1336int fdt_set_status_by_alias(void *fdt, const char* alias,
1337 enum fdt_status status, unsigned int error_code)
1338{
1339 int offset = fdt_path_offset(fdt, alias);
1340
1341 return fdt_set_node_status(fdt, offset, status, error_code);
1342}
1343
096eb3f5 1344#if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
beca5a5f
AG
1345int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1346{
1347 int noff;
1348 int ret;
1349
1350 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1351 if (noff != -FDT_ERR_NOTFOUND) {
1352 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1353add_edid:
1354 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1355 if (ret == -FDT_ERR_NOSPACE) {
1356 ret = fdt_increase_size(blob, 512);
1357 if (!ret)
1358 goto add_edid;
1359 else
1360 goto err_size;
1361 } else if (ret < 0) {
1362 printf("Can't add property: %s\n", fdt_strerror(ret));
1363 return ret;
1364 }
1365 }
1366 return 0;
1367err_size:
1368 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1369 return ret;
1370}
1371#endif
bb682001
TT
1372
1373/*
1374 * Verify the physical address of device tree node for a given alias
1375 *
1376 * This function locates the device tree node of a given alias, and then
1377 * verifies that the physical address of that device matches the given
1378 * parameter. It displays a message if there is a mismatch.
1379 *
1380 * Returns 1 on success, 0 on failure
1381 */
1382int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1383{
1384 const char *path;
8aa5ec6e 1385 const fdt32_t *reg;
bb682001
TT
1386 int node, len;
1387 u64 dt_addr;
1388
1389 path = fdt_getprop(fdt, anode, alias, NULL);
1390 if (!path) {
1391 /* If there's no such alias, then it's not a failure */
1392 return 1;
1393 }
1394
1395 node = fdt_path_offset(fdt, path);
1396 if (node < 0) {
1397 printf("Warning: device tree alias '%s' points to invalid "
1398 "node %s.\n", alias, path);
1399 return 0;
1400 }
1401
1402 reg = fdt_getprop(fdt, node, "reg", &len);
1403 if (!reg) {
1404 printf("Warning: device tree node '%s' has no address.\n",
1405 path);
1406 return 0;
1407 }
1408
1409 dt_addr = fdt_translate_address(fdt, node, reg);
1410 if (addr != dt_addr) {
e48f3741
SG
1411 printf("Warning: U-Boot configured device %s at address %"
1412 PRIx64 ",\n but the device tree has it address %"
1413 PRIx64 ".\n", alias, addr, dt_addr);
bb682001
TT
1414 return 0;
1415 }
1416
1417 return 1;
1418}
1419
1420/*
1421 * Returns the base address of an SOC or PCI node
1422 */
1423u64 fdt_get_base_address(void *fdt, int node)
1424{
1425 int size;
1426 u32 naddr;
8aa5ec6e 1427 const fdt32_t *prop;
bb682001 1428
933cdbb4 1429 naddr = fdt_address_cells(fdt, node);
bb682001
TT
1430
1431 prop = fdt_getprop(fdt, node, "ranges", &size);
1432
1433 return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0;
1434}
c48e6868
AG
1435
1436/*
1437 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1438 */
1439static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1440 uint64_t *val, int cells)
1441{
1442 const fdt32_t *prop32 = &prop[cell_off];
1443 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];
1444
1445 if ((cell_off + cells) > prop_len)
1446 return -FDT_ERR_NOSPACE;
1447
1448 switch (cells) {
1449 case 1:
1450 *val = fdt32_to_cpu(*prop32);
1451 break;
1452 case 2:
1453 *val = fdt64_to_cpu(*prop64);
1454 break;
1455 default:
1456 return -FDT_ERR_NOSPACE;
1457 }
1458
1459 return 0;
1460}
1461
1462/**
1463 * fdt_read_range - Read a node's n'th range property
1464 *
1465 * @fdt: ptr to device tree
1466 * @node: offset of node
1467 * @n: range index
1468 * @child_addr: pointer to storage for the "child address" field
1469 * @addr: pointer to storage for the CPU view translated physical start
1470 * @len: pointer to storage for the range length
1471 *
1472 * Convenience function that reads and interprets a specific range out of
1473 * a number of the "ranges" property array.
1474 */
1475int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1476 uint64_t *addr, uint64_t *len)
1477{
1478 int pnode = fdt_parent_offset(fdt, node);
1479 const fdt32_t *ranges;
1480 int pacells;
1481 int acells;
1482 int scells;
1483 int ranges_len;
1484 int cell = 0;
1485 int r = 0;
1486
1487 /*
1488 * The "ranges" property is an array of
1489 * { <child address> <parent address> <size in child address space> }
1490 *
1491 * All 3 elements can span a diffent number of cells. Fetch their size.
1492 */
1493 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1494 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1495 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1496
1497 /* Now try to get the ranges property */
1498 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1499 if (!ranges)
1500 return -FDT_ERR_NOTFOUND;
1501 ranges_len /= sizeof(uint32_t);
1502
1503 /* Jump to the n'th entry */
1504 cell = n * (pacells + acells + scells);
1505
1506 /* Read <child address> */
1507 if (child_addr) {
1508 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1509 acells);
1510 if (r)
1511 return r;
1512 }
1513 cell += acells;
1514
1515 /* Read <parent address> */
1516 if (addr)
1517 *addr = fdt_translate_address(fdt, node, ranges + cell);
1518 cell += pacells;
1519
1520 /* Read <size in child address space> */
1521 if (len) {
1522 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
1523 if (r)
1524 return r;
1525 }
1526
1527 return 0;
1528}
d4f495a8
HG
1529
1530/**
1531 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1532 *
1533 * @fdt: ptr to device tree
1534 * @node: offset of the simplefb node
1535 * @base_address: framebuffer base address
1536 * @width: width in pixels
1537 * @height: height in pixels
1538 * @stride: bytes per line
1539 * @format: pixel format string
1540 *
1541 * Convenience function to fill and enable a simplefb node.
1542 */
1543int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
1544 u32 height, u32 stride, const char *format)
1545{
1546 char name[32];
1547 fdt32_t cells[4];
1548 int i, addrc, sizec, ret;
1549
1550 of_bus_default_count_cells(fdt, fdt_parent_offset(fdt, node),
1551 &addrc, &sizec);
1552 i = 0;
1553 if (addrc == 2)
1554 cells[i++] = cpu_to_fdt32(base_address >> 32);
1555 cells[i++] = cpu_to_fdt32(base_address);
1556 if (sizec == 2)
1557 cells[i++] = 0;
1558 cells[i++] = cpu_to_fdt32(height * stride);
1559
1560 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
1561 if (ret < 0)
1562 return ret;
1563
c3ec646d 1564 snprintf(name, sizeof(name), "framebuffer@%" PRIx64, base_address);
d4f495a8
HG
1565 ret = fdt_set_name(fdt, node, name);
1566 if (ret < 0)
1567 return ret;
1568
1569 ret = fdt_setprop_u32(fdt, node, "width", width);
1570 if (ret < 0)
1571 return ret;
1572
1573 ret = fdt_setprop_u32(fdt, node, "height", height);
1574 if (ret < 0)
1575 return ret;
1576
1577 ret = fdt_setprop_u32(fdt, node, "stride", stride);
1578 if (ret < 0)
1579 return ret;
1580
1581 ret = fdt_setprop_string(fdt, node, "format", format);
1582 if (ret < 0)
1583 return ret;
1584
1585 ret = fdt_setprop_string(fdt, node, "status", "okay");
1586 if (ret < 0)
1587 return ret;
1588
1589 return 0;
1590}
08daa258
TH
1591
1592/*
1593 * Update native-mode in display-timings from display environment variable.
1594 * The node to update are specified by path.
1595 */
1596int fdt_fixup_display(void *blob, const char *path, const char *display)
1597{
1598 int off, toff;
1599
1600 if (!display || !path)
1601 return -FDT_ERR_NOTFOUND;
1602
1603 toff = fdt_path_offset(blob, path);
1604 if (toff >= 0)
1605 toff = fdt_subnode_offset(blob, toff, "display-timings");
1606 if (toff < 0)
1607 return toff;
1608
1609 for (off = fdt_first_subnode(blob, toff);
1610 off >= 0;
1611 off = fdt_next_subnode(blob, off)) {
1612 uint32_t h = fdt_get_phandle(blob, off);
1613 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL),
1614 fdt32_to_cpu(h));
1615 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0)
1616 return fdt_setprop_u32(blob, toff, "native-mode", h);
1617 }
1618 return toff;
1619}