blob: 46aa84220b2b981d0ea42be3e67ab50af1ed4958 [file] [log] [blame]
Gerald Van Baren64dbbd42007-04-06 14:19:43 -04001/*
2 * (C) Copyright 2007
3 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
4 *
Kumar Galaa0342c02010-06-16 14:27:38 -05005 * Copyright 2010 Freescale Semiconductor, Inc.
6 *
Gerald Van Baren64dbbd42007-04-06 14:19:43 -04007 * See file CREDITS for list of people who contributed to this
8 * project.
9 *
10 * This program is free software; you can redistribute it and/or
11 * modify it under the terms of the GNU General Public License as
12 * published by the Free Software Foundation; either version 2 of
13 * the License, or (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 * GNU General Public License for more details.
19 *
20 * You should have received a copy of the GNU General Public License
21 * along with this program; if not, write to the Free Software
22 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
23 * MA 02111-1307 USA
24 */
25
26#include <common.h>
Anton Vorontsov3e303f72009-10-15 17:47:04 +040027#include <stdio_dev.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040028#include <linux/ctype.h>
29#include <linux/types.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040030#include <asm/global_data.h>
31#include <fdt.h>
32#include <libfdt.h>
33#include <fdt_support.h>
Kumar Gala151c8b02007-11-26 17:06:15 -060034#include <exports.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040035
36/*
37 * Global data (for the gd->bd)
38 */
39DECLARE_GLOBAL_DATA_PTR;
40
Kumar Gala3bed2aa2008-10-23 00:05:47 -050041/**
42 * fdt_getprop_u32_default - Find a node and return it's property or a default
43 *
44 * @fdt: ptr to device tree
45 * @path: path of node
46 * @prop: property name
47 * @dflt: default value if the property isn't found
48 *
49 * Convenience function to find a node and return it's property or a
50 * default value if it doesn't exist.
51 */
52u32 fdt_getprop_u32_default(void *fdt, const char *path, const char *prop,
53 const u32 dflt)
54{
55 const u32 *val;
56 int off;
57
58 off = fdt_path_offset(fdt, path);
59 if (off < 0)
60 return dflt;
61
62 val = fdt_getprop(fdt, off, prop, NULL);
63 if (val)
64 return *val;
65 else
66 return dflt;
67}
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040068
Kumar Galaa3c29332007-10-24 10:21:57 -050069/**
70 * fdt_find_and_setprop: Find a node and set it's property
71 *
72 * @fdt: ptr to device tree
73 * @node: path of node
74 * @prop: property name
75 * @val: ptr to new value
76 * @len: length of new property value
77 * @create: flag to create the property if it doesn't exist
78 *
79 * Convenience function to directly set a property given the path to the node.
80 */
81int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
82 const void *val, int len, int create)
83{
Kumar Gala8d04f022007-10-24 11:04:22 -050084 int nodeoff = fdt_path_offset(fdt, node);
Kumar Galaa3c29332007-10-24 10:21:57 -050085
86 if (nodeoff < 0)
87 return nodeoff;
88
89 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, 0) == NULL))
90 return 0; /* create flag not set; so exit quietly */
91
92 return fdt_setprop(fdt, nodeoff, prop, val, len);
93}
94
Kumar Gala151c8b02007-11-26 17:06:15 -060095#ifdef CONFIG_OF_STDOUT_VIA_ALIAS
Anton Vorontsov3e303f72009-10-15 17:47:04 +040096
97#ifdef CONFIG_SERIAL_MULTI
98static void fdt_fill_multisername(char *sername, size_t maxlen)
99{
100 const char *outname = stdio_devices[stdout]->name;
101
102 if (strcmp(outname, "serial") > 0)
103 strncpy(sername, outname, maxlen);
104
105 /* eserial? */
106 if (strcmp(outname + 1, "serial") > 0)
107 strncpy(sername, outname + 1, maxlen);
108}
109#else
110static inline void fdt_fill_multisername(char *sername, size_t maxlen) {}
111#endif /* CONFIG_SERIAL_MULTI */
112
Detlev Zundel40777812008-06-20 22:24:05 +0200113static int fdt_fixup_stdout(void *fdt, int chosenoff)
Kumar Gala151c8b02007-11-26 17:06:15 -0600114{
115 int err = 0;
116#ifdef CONFIG_CONS_INDEX
117 int node;
118 char sername[9] = { 0 };
119 const char *path;
120
Anton Vorontsov3e303f72009-10-15 17:47:04 +0400121 fdt_fill_multisername(sername, sizeof(sername) - 1);
122 if (!sername[0])
123 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
Kumar Gala151c8b02007-11-26 17:06:15 -0600124
125 err = node = fdt_path_offset(fdt, "/aliases");
126 if (node >= 0) {
127 int len;
128 path = fdt_getprop(fdt, node, sername, &len);
129 if (path) {
130 char *p = malloc(len);
131 err = -FDT_ERR_NOSPACE;
132 if (p) {
133 memcpy(p, path, len);
Detlev Zundel40777812008-06-20 22:24:05 +0200134 err = fdt_setprop(fdt, chosenoff,
Kumar Gala151c8b02007-11-26 17:06:15 -0600135 "linux,stdout-path", p, len);
136 free(p);
137 }
138 } else {
139 err = len;
140 }
141 }
142#endif
143 if (err < 0)
144 printf("WARNING: could not set linux,stdout-path %s.\n",
145 fdt_strerror(err));
146
147 return err;
148}
149#endif
150
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500151int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force)
152{
153 int nodeoffset;
154 int err, j, total;
155 u32 tmp;
156 const char *path;
157 uint64_t addr, size;
158
159 /* Find the "chosen" node. */
160 nodeoffset = fdt_path_offset (fdt, "/chosen");
161
162 /* If there is no "chosen" node in the blob return */
163 if (nodeoffset < 0) {
164 printf("fdt_initrd: %s\n", fdt_strerror(nodeoffset));
165 return nodeoffset;
166 }
167
168 /* just return if initrd_start/end aren't valid */
169 if ((initrd_start == 0) || (initrd_end == 0))
170 return 0;
171
172 total = fdt_num_mem_rsv(fdt);
173
174 /*
175 * Look for an existing entry and update it. If we don't find
176 * the entry, we will j be the next available slot.
177 */
178 for (j = 0; j < total; j++) {
179 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
180 if (addr == initrd_start) {
181 fdt_del_mem_rsv(fdt, j);
182 break;
183 }
184 }
185
Grant Likelyce6b27a2011-03-28 09:58:55 +0000186 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500187 if (err < 0) {
188 printf("fdt_initrd: %s\n", fdt_strerror(err));
189 return err;
190 }
191
192 path = fdt_getprop(fdt, nodeoffset, "linux,initrd-start", NULL);
193 if ((path == NULL) || force) {
194 tmp = __cpu_to_be32(initrd_start);
195 err = fdt_setprop(fdt, nodeoffset,
196 "linux,initrd-start", &tmp, sizeof(tmp));
197 if (err < 0) {
198 printf("WARNING: "
199 "could not set linux,initrd-start %s.\n",
200 fdt_strerror(err));
201 return err;
202 }
203 tmp = __cpu_to_be32(initrd_end);
204 err = fdt_setprop(fdt, nodeoffset,
205 "linux,initrd-end", &tmp, sizeof(tmp));
206 if (err < 0) {
207 printf("WARNING: could not set linux,initrd-end %s.\n",
208 fdt_strerror(err));
209
210 return err;
211 }
212 }
213
214 return 0;
215}
216
Heiko Schocher56844a22008-09-11 08:11:23 +0200217int fdt_chosen(void *fdt, int force)
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400218{
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400219 int nodeoffset;
220 int err;
Gerald Van Baren35ec3982007-05-25 22:08:57 -0400221 char *str; /* used to set string properties */
Gerald Van Barenb60af3d2007-12-29 22:45:27 -0500222 const char *path;
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400223
224 err = fdt_check_header(fdt);
225 if (err < 0) {
Gerald Van Baren5fe6be62007-08-07 21:14:22 -0400226 printf("fdt_chosen: %s\n", fdt_strerror(err));
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400227 return err;
228 }
229
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400230 /*
231 * Find the "chosen" node.
232 */
Kumar Gala8d04f022007-10-24 11:04:22 -0500233 nodeoffset = fdt_path_offset (fdt, "/chosen");
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400234
235 /*
Gerald Van Barenb60af3d2007-12-29 22:45:27 -0500236 * If there is no "chosen" node in the blob, create it.
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400237 */
238 if (nodeoffset < 0) {
239 /*
240 * Create a new node "/chosen" (offset 0 is root level)
241 */
242 nodeoffset = fdt_add_subnode(fdt, 0, "chosen");
243 if (nodeoffset < 0) {
Gerald Van Baren5fe6be62007-08-07 21:14:22 -0400244 printf("WARNING: could not create /chosen %s.\n",
Gerald Van Baren35ec3982007-05-25 22:08:57 -0400245 fdt_strerror(nodeoffset));
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400246 return nodeoffset;
247 }
248 }
249
250 /*
Gerald Van Barenb60af3d2007-12-29 22:45:27 -0500251 * Create /chosen properites that don't exist in the fdt.
252 * If the property exists, update it only if the "force" parameter
253 * is true.
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400254 */
255 str = getenv("bootargs");
256 if (str != NULL) {
Gerald Van Barenb60af3d2007-12-29 22:45:27 -0500257 path = fdt_getprop(fdt, nodeoffset, "bootargs", NULL);
258 if ((path == NULL) || force) {
259 err = fdt_setprop(fdt, nodeoffset,
260 "bootargs", str, strlen(str)+1);
261 if (err < 0)
262 printf("WARNING: could not set bootargs %s.\n",
263 fdt_strerror(err));
264 }
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400265 }
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500266
Kumar Gala151c8b02007-11-26 17:06:15 -0600267#ifdef CONFIG_OF_STDOUT_VIA_ALIAS
Gerald Van Barenb60af3d2007-12-29 22:45:27 -0500268 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
269 if ((path == NULL) || force)
270 err = fdt_fixup_stdout(fdt, nodeoffset);
Kumar Gala151c8b02007-11-26 17:06:15 -0600271#endif
272
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400273#ifdef OF_STDOUT_PATH
Gerald Van Barenb60af3d2007-12-29 22:45:27 -0500274 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
275 if ((path == NULL) || force) {
276 err = fdt_setprop(fdt, nodeoffset,
277 "linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1);
278 if (err < 0)
279 printf("WARNING: could not set linux,stdout-path %s.\n",
280 fdt_strerror(err));
281 }
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400282#endif
283
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400284 return err;
285}
286
Kumar Galae93becf2007-11-03 19:46:28 -0500287void do_fixup_by_path(void *fdt, const char *path, const char *prop,
288 const void *val, int len, int create)
289{
290#if defined(DEBUG)
291 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600292 debug("Updating property '%s/%s' = ", path, prop);
Kumar Galae93becf2007-11-03 19:46:28 -0500293 for (i = 0; i < len; i++)
294 debug(" %.2x", *(u8*)(val+i));
295 debug("\n");
296#endif
297 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
298 if (rc)
299 printf("Unable to update property %s:%s, err=%s\n",
300 path, prop, fdt_strerror(rc));
301}
302
303void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
304 u32 val, int create)
305{
306 val = cpu_to_fdt32(val);
307 do_fixup_by_path(fdt, path, prop, &val, sizeof(val), create);
308}
309
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600310void do_fixup_by_prop(void *fdt,
311 const char *pname, const void *pval, int plen,
312 const char *prop, const void *val, int len,
313 int create)
314{
315 int off;
316#if defined(DEBUG)
317 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600318 debug("Updating property '%s' = ", prop);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600319 for (i = 0; i < len; i++)
320 debug(" %.2x", *(u8*)(val+i));
321 debug("\n");
322#endif
323 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
324 while (off != -FDT_ERR_NOTFOUND) {
325 if (create || (fdt_get_property(fdt, off, prop, 0) != NULL))
326 fdt_setprop(fdt, off, prop, val, len);
327 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
328 }
329}
330
331void do_fixup_by_prop_u32(void *fdt,
332 const char *pname, const void *pval, int plen,
333 const char *prop, u32 val, int create)
334{
335 val = cpu_to_fdt32(val);
336 do_fixup_by_prop(fdt, pname, pval, plen, prop, &val, 4, create);
337}
338
339void do_fixup_by_compat(void *fdt, const char *compat,
340 const char *prop, const void *val, int len, int create)
341{
342 int off = -1;
343#if defined(DEBUG)
344 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600345 debug("Updating property '%s' = ", prop);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600346 for (i = 0; i < len; i++)
347 debug(" %.2x", *(u8*)(val+i));
348 debug("\n");
349#endif
350 off = fdt_node_offset_by_compatible(fdt, -1, compat);
351 while (off != -FDT_ERR_NOTFOUND) {
352 if (create || (fdt_get_property(fdt, off, prop, 0) != NULL))
353 fdt_setprop(fdt, off, prop, val, len);
354 off = fdt_node_offset_by_compatible(fdt, off, compat);
355 }
356}
357
358void do_fixup_by_compat_u32(void *fdt, const char *compat,
359 const char *prop, u32 val, int create)
360{
361 val = cpu_to_fdt32(val);
362 do_fixup_by_compat(fdt, compat, prop, &val, 4, create);
363}
364
John Rigbya6bd9e82010-10-13 13:57:33 -0600365/*
366 * Get cells len in bytes
367 * if #NNNN-cells property is 2 then len is 8
368 * otherwise len is 4
369 */
370static int get_cells_len(void *blob, char *nr_cells_name)
Kumar Gala3c927282007-11-26 14:57:45 -0600371{
John Rigbya6bd9e82010-10-13 13:57:33 -0600372 const u32 *cell;
373
374 cell = fdt_getprop(blob, 0, nr_cells_name, NULL);
375 if (cell && *cell == 2)
376 return 8;
377
378 return 4;
379}
380
381/*
382 * Write a 4 or 8 byte big endian cell
383 */
384static void write_cell(u8 *addr, u64 val, int size)
385{
386 int shift = (size - 1) * 8;
387 while (size-- > 0) {
388 *addr++ = (val >> shift) & 0xff;
389 shift -= 8;
390 }
391}
392
393int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
394{
395 int err, nodeoffset;
396 int addr_cell_len, size_cell_len, len;
Kyle Moffettd13ffa62011-02-23 06:18:24 +0000397 u8 tmp[banks * 16]; /* Up to 64-bit address + 64-bit size */
John Rigbya6bd9e82010-10-13 13:57:33 -0600398 int bank;
Kumar Gala3c927282007-11-26 14:57:45 -0600399
400 err = fdt_check_header(blob);
401 if (err < 0) {
402 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
403 return err;
404 }
405
406 /* update, or add and update /memory node */
407 nodeoffset = fdt_path_offset(blob, "/memory");
408 if (nodeoffset < 0) {
409 nodeoffset = fdt_add_subnode(blob, 0, "memory");
410 if (nodeoffset < 0)
411 printf("WARNING: could not create /memory: %s.\n",
412 fdt_strerror(nodeoffset));
413 return nodeoffset;
414 }
415 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
416 sizeof("memory"));
417 if (err < 0) {
418 printf("WARNING: could not set %s %s.\n", "device_type",
419 fdt_strerror(err));
420 return err;
421 }
422
John Rigbya6bd9e82010-10-13 13:57:33 -0600423 addr_cell_len = get_cells_len(blob, "#address-cells");
424 size_cell_len = get_cells_len(blob, "#size-cells");
Kumar Gala3c927282007-11-26 14:57:45 -0600425
John Rigbya6bd9e82010-10-13 13:57:33 -0600426 for (bank = 0, len = 0; bank < banks; bank++) {
427 write_cell(tmp + len, start[bank], addr_cell_len);
428 len += addr_cell_len;
429
430 write_cell(tmp + len, size[bank], size_cell_len);
431 len += size_cell_len;
Kumar Gala3c927282007-11-26 14:57:45 -0600432 }
433
434 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
435 if (err < 0) {
436 printf("WARNING: could not set %s %s.\n",
437 "reg", fdt_strerror(err));
438 return err;
439 }
440 return 0;
441}
442
John Rigbya6bd9e82010-10-13 13:57:33 -0600443int fdt_fixup_memory(void *blob, u64 start, u64 size)
444{
445 return fdt_fixup_memory_banks(blob, &start, &size, 1);
446}
447
Kumar Galaba37aa02008-08-19 15:41:18 -0500448void fdt_fixup_ethernet(void *fdt)
Kumar Galaab544632007-11-21 11:11:03 -0600449{
Kumar Galaba37aa02008-08-19 15:41:18 -0500450 int node, i, j;
451 char enet[16], *tmp, *end;
452 char mac[16] = "ethaddr";
Kumar Galaab544632007-11-21 11:11:03 -0600453 const char *path;
Kumar Galaba37aa02008-08-19 15:41:18 -0500454 unsigned char mac_addr[6];
Kumar Galaab544632007-11-21 11:11:03 -0600455
456 node = fdt_path_offset(fdt, "/aliases");
Kumar Galaba37aa02008-08-19 15:41:18 -0500457 if (node < 0)
458 return;
459
460 i = 0;
461 while ((tmp = getenv(mac)) != NULL) {
462 sprintf(enet, "ethernet%d", i);
463 path = fdt_getprop(fdt, node, enet, NULL);
464 if (!path) {
465 debug("No alias for %s\n", enet);
466 sprintf(mac, "eth%daddr", ++i);
467 continue;
Kumar Galaab544632007-11-21 11:11:03 -0600468 }
Kumar Galaba37aa02008-08-19 15:41:18 -0500469
470 for (j = 0; j < 6; j++) {
471 mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
472 if (tmp)
473 tmp = (*end) ? end+1 : end;
Kumar Galaab544632007-11-21 11:11:03 -0600474 }
Kumar Galaba37aa02008-08-19 15:41:18 -0500475
476 do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0);
477 do_fixup_by_path(fdt, path, "local-mac-address",
478 &mac_addr, 6, 1);
479
480 sprintf(mac, "eth%daddr", ++i);
Kumar Galaab544632007-11-21 11:11:03 -0600481 }
482}
Anton Vorontsov18e69a32008-03-14 23:20:18 +0300483
Kumar Gala3082d232008-08-15 08:24:42 -0500484/* Resize the fdt to its actual size + a bit of padding */
485int fdt_resize(void *blob)
486{
487 int i;
488 uint64_t addr, size;
489 int total, ret;
490 uint actualsize;
491
492 if (!blob)
493 return 0;
494
495 total = fdt_num_mem_rsv(blob);
496 for (i = 0; i < total; i++) {
497 fdt_get_mem_rsv(blob, i, &addr, &size);
498 if (addr == (uint64_t)(u32)blob) {
499 fdt_del_mem_rsv(blob, i);
500 break;
501 }
502 }
503
Peter Korsgaardf242a082008-10-28 08:26:52 +0100504 /*
505 * Calculate the actual size of the fdt
Feng Wang3840ebf2010-08-03 16:22:43 +0200506 * plus the size needed for 5 fdt_add_mem_rsv, one
507 * for the fdt itself and 4 for a possible initrd
508 * ((initrd-start + initrd-end) * 2 (name & value))
Peter Korsgaardf242a082008-10-28 08:26:52 +0100509 */
Kumar Gala3082d232008-08-15 08:24:42 -0500510 actualsize = fdt_off_dt_strings(blob) +
Feng Wang3840ebf2010-08-03 16:22:43 +0200511 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
Kumar Gala3082d232008-08-15 08:24:42 -0500512
513 /* Make it so the fdt ends on a page boundary */
Peter Korsgaardc088a102009-01-14 13:52:24 +0100514 actualsize = ALIGN(actualsize + ((uint)blob & 0xfff), 0x1000);
Kumar Gala3082d232008-08-15 08:24:42 -0500515 actualsize = actualsize - ((uint)blob & 0xfff);
516
517 /* Change the fdt header to reflect the correct size */
518 fdt_set_totalsize(blob, actualsize);
519
520 /* Add the new reservation */
521 ret = fdt_add_mem_rsv(blob, (uint)blob, actualsize);
522 if (ret < 0)
523 return ret;
524
525 return actualsize;
526}
Kumar Gala8ab451c2008-10-22 23:33:56 -0500527
528#ifdef CONFIG_PCI
Kumar Galacfd700b2009-08-05 09:03:54 -0500529#define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
Kumar Gala8ab451c2008-10-22 23:33:56 -0500530
531#define FDT_PCI_PREFETCH (0x40000000)
532#define FDT_PCI_MEM32 (0x02000000)
533#define FDT_PCI_IO (0x01000000)
534#define FDT_PCI_MEM64 (0x03000000)
535
536int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
537
538 int addrcell, sizecell, len, r;
539 u32 *dma_range;
540 /* sized based on pci addr cells, size-cells, & address-cells */
541 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
542
543 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
544 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
545
546 dma_range = &dma_ranges[0];
547 for (r = 0; r < hose->region_count; r++) {
548 u64 bus_start, phys_start, size;
549
Kumar Galaff4e66e2009-02-06 09:49:31 -0600550 /* skip if !PCI_REGION_SYS_MEMORY */
551 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
Kumar Gala8ab451c2008-10-22 23:33:56 -0500552 continue;
553
554 bus_start = (u64)hose->regions[r].bus_start;
555 phys_start = (u64)hose->regions[r].phys_start;
556 size = (u64)hose->regions[r].size;
557
558 dma_range[0] = 0;
Kumar Galacfd700b2009-08-05 09:03:54 -0500559 if (size >= 0x100000000ull)
Kumar Gala8ab451c2008-10-22 23:33:56 -0500560 dma_range[0] |= FDT_PCI_MEM64;
561 else
562 dma_range[0] |= FDT_PCI_MEM32;
563 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
564 dma_range[0] |= FDT_PCI_PREFETCH;
565#ifdef CONFIG_SYS_PCI_64BIT
566 dma_range[1] = bus_start >> 32;
567#else
568 dma_range[1] = 0;
569#endif
570 dma_range[2] = bus_start & 0xffffffff;
571
572 if (addrcell == 2) {
573 dma_range[3] = phys_start >> 32;
574 dma_range[4] = phys_start & 0xffffffff;
575 } else {
576 dma_range[3] = phys_start & 0xffffffff;
577 }
578
579 if (sizecell == 2) {
580 dma_range[3 + addrcell + 0] = size >> 32;
581 dma_range[3 + addrcell + 1] = size & 0xffffffff;
582 } else {
583 dma_range[3 + addrcell + 0] = size & 0xffffffff;
584 }
585
586 dma_range += (3 + addrcell + sizecell);
587 }
588
589 len = dma_range - &dma_ranges[0];
590 if (len)
591 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
592
593 return 0;
594}
595#endif
Stefan Roese30d45c02009-10-21 11:59:52 +0200596
597#ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
598/*
Stefan Roese8a805df2010-09-16 14:01:53 +0200599 * Provide a weak default function to return the flash bank size.
600 * There might be multiple non-identical flash chips connected to one
601 * chip-select, so we need to pass an index as well.
602 */
603u32 __flash_get_bank_size(int cs, int idx)
604{
605 extern flash_info_t flash_info[];
606
607 /*
608 * As default, a simple 1:1 mapping is provided. Boards with
609 * a different mapping need to supply a board specific mapping
610 * routine.
611 */
612 return flash_info[cs].size;
613}
614u32 flash_get_bank_size(int cs, int idx)
615 __attribute__((weak, alias("__flash_get_bank_size")));
616
617/*
Stefan Roese30d45c02009-10-21 11:59:52 +0200618 * This function can be used to update the size in the "reg" property
Stefan Roese8a805df2010-09-16 14:01:53 +0200619 * of all NOR FLASH device nodes. This is necessary for boards with
Stefan Roese30d45c02009-10-21 11:59:52 +0200620 * non-fixed NOR FLASH sizes.
621 */
Stefan Roese8a805df2010-09-16 14:01:53 +0200622int fdt_fixup_nor_flash_size(void *blob)
Stefan Roese30d45c02009-10-21 11:59:52 +0200623{
624 char compat[][16] = { "cfi-flash", "jedec-flash" };
625 int off;
626 int len;
627 struct fdt_property *prop;
Stefan Roese2778a012010-09-24 13:51:50 +0200628 u32 *reg, *reg2;
Stefan Roese30d45c02009-10-21 11:59:52 +0200629 int i;
630
631 for (i = 0; i < 2; i++) {
632 off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
633 while (off != -FDT_ERR_NOTFOUND) {
Stefan Roese8a805df2010-09-16 14:01:53 +0200634 int idx;
635
Stefan Roese30d45c02009-10-21 11:59:52 +0200636 /*
Stefan Roese8a805df2010-09-16 14:01:53 +0200637 * Found one compatible node, so fixup the size
638 * int its reg properties
Stefan Roese30d45c02009-10-21 11:59:52 +0200639 */
640 prop = fdt_get_property_w(blob, off, "reg", &len);
641 if (prop) {
Stefan Roese8a805df2010-09-16 14:01:53 +0200642 int tuple_size = 3 * sizeof(reg);
Stefan Roese30d45c02009-10-21 11:59:52 +0200643
Stefan Roese8a805df2010-09-16 14:01:53 +0200644 /*
645 * There might be multiple reg-tuples,
646 * so loop through them all
647 */
Stefan Roese2778a012010-09-24 13:51:50 +0200648 reg = reg2 = (u32 *)&prop->data[0];
649 for (idx = 0; idx < (len / tuple_size); idx++) {
Stefan Roese8a805df2010-09-16 14:01:53 +0200650 /*
651 * Update size in reg property
652 */
653 reg[2] = flash_get_bank_size(reg[0],
654 idx);
Stefan Roese2778a012010-09-24 13:51:50 +0200655
656 /*
657 * Point to next reg tuple
658 */
659 reg += 3;
Stefan Roese30d45c02009-10-21 11:59:52 +0200660 }
Stefan Roese2778a012010-09-24 13:51:50 +0200661
662 fdt_setprop(blob, off, "reg", reg2, len);
Stefan Roese30d45c02009-10-21 11:59:52 +0200663 }
664
665 /* Move to next compatible node */
666 off = fdt_node_offset_by_compatible(blob, off,
667 compat[i]);
668 }
669 }
670
Stefan Roese8a805df2010-09-16 14:01:53 +0200671 return 0;
Stefan Roese30d45c02009-10-21 11:59:52 +0200672}
673#endif
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100674
Matthew McClintockcb2707a2010-10-13 13:39:26 +0200675int fdt_increase_size(void *fdt, int add_len)
676{
677 int newlen;
678
679 newlen = fdt_totalsize(fdt) + add_len;
680
681 /* Open in place with a new len */
682 return fdt_open_into(fdt, fdt, newlen);
683}
684
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100685#ifdef CONFIG_FDT_FIXUP_PARTITIONS
686#include <jffs2/load_kernel.h>
687#include <mtd_node.h>
688
689struct reg_cell {
690 unsigned int r0;
691 unsigned int r1;
692};
693
694int fdt_del_subnodes(const void *blob, int parent_offset)
695{
696 int off, ndepth;
697 int ret;
698
699 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
700 (off >= 0) && (ndepth > 0);
701 off = fdt_next_node(blob, off, &ndepth)) {
702 if (ndepth == 1) {
703 debug("delete %s: offset: %x\n",
704 fdt_get_name(blob, off, 0), off);
705 ret = fdt_del_node((void *)blob, off);
706 if (ret < 0) {
707 printf("Can't delete node: %s\n",
708 fdt_strerror(ret));
709 return ret;
710 } else {
711 ndepth = 0;
712 off = parent_offset;
713 }
714 }
715 }
716 return 0;
717}
718
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100719int fdt_del_partitions(void *blob, int parent_offset)
720{
721 const void *prop;
722 int ndepth = 0;
723 int off;
724 int ret;
725
726 off = fdt_next_node(blob, parent_offset, &ndepth);
727 if (off > 0 && ndepth == 1) {
728 prop = fdt_getprop(blob, off, "label", NULL);
729 if (prop == NULL) {
730 /*
731 * Could not find label property, nand {}; node?
732 * Check subnode, delete partitions there if any.
733 */
734 return fdt_del_partitions(blob, off);
735 } else {
736 ret = fdt_del_subnodes(blob, parent_offset);
737 if (ret < 0) {
738 printf("Can't remove subnodes: %s\n",
739 fdt_strerror(ret));
740 return ret;
741 }
742 }
743 }
744 return 0;
745}
746
747int fdt_node_set_part_info(void *blob, int parent_offset,
748 struct mtd_device *dev)
749{
750 struct list_head *pentry;
751 struct part_info *part;
752 struct reg_cell cell;
753 int off, ndepth = 0;
754 int part_num, ret;
755 char buf[64];
756
757 ret = fdt_del_partitions(blob, parent_offset);
758 if (ret < 0)
759 return ret;
760
761 /*
762 * Check if it is nand {}; subnode, adjust
763 * the offset in this case
764 */
765 off = fdt_next_node(blob, parent_offset, &ndepth);
766 if (off > 0 && ndepth == 1)
767 parent_offset = off;
768
769 part_num = 0;
770 list_for_each_prev(pentry, &dev->parts) {
771 int newoff;
772
773 part = list_entry(pentry, struct part_info, link);
774
775 debug("%2d: %-20s0x%08x\t0x%08x\t%d\n",
776 part_num, part->name, part->size,
777 part->offset, part->mask_flags);
778
779 sprintf(buf, "partition@%x", part->offset);
780add_sub:
781 ret = fdt_add_subnode(blob, parent_offset, buf);
782 if (ret == -FDT_ERR_NOSPACE) {
783 ret = fdt_increase_size(blob, 512);
784 if (!ret)
785 goto add_sub;
786 else
787 goto err_size;
788 } else if (ret < 0) {
789 printf("Can't add partition node: %s\n",
790 fdt_strerror(ret));
791 return ret;
792 }
793 newoff = ret;
794
795 /* Check MTD_WRITEABLE_CMD flag */
796 if (part->mask_flags & 1) {
797add_ro:
798 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
799 if (ret == -FDT_ERR_NOSPACE) {
800 ret = fdt_increase_size(blob, 512);
801 if (!ret)
802 goto add_ro;
803 else
804 goto err_size;
805 } else if (ret < 0)
806 goto err_prop;
807 }
808
809 cell.r0 = cpu_to_fdt32(part->offset);
810 cell.r1 = cpu_to_fdt32(part->size);
811add_reg:
812 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
813 if (ret == -FDT_ERR_NOSPACE) {
814 ret = fdt_increase_size(blob, 512);
815 if (!ret)
816 goto add_reg;
817 else
818 goto err_size;
819 } else if (ret < 0)
820 goto err_prop;
821
822add_label:
823 ret = fdt_setprop_string(blob, newoff, "label", part->name);
824 if (ret == -FDT_ERR_NOSPACE) {
825 ret = fdt_increase_size(blob, 512);
826 if (!ret)
827 goto add_label;
828 else
829 goto err_size;
830 } else if (ret < 0)
831 goto err_prop;
832
833 part_num++;
834 }
835 return 0;
836err_size:
837 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
838 return ret;
839err_prop:
840 printf("Can't add property: %s\n", fdt_strerror(ret));
841 return ret;
842}
843
844/*
845 * Update partitions in nor/nand nodes using info from
846 * mtdparts environment variable. The nodes to update are
847 * specified by node_info structure which contains mtd device
848 * type and compatible string: E. g. the board code in
849 * ft_board_setup() could use:
850 *
851 * struct node_info nodes[] = {
852 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
853 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
854 * };
855 *
856 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
857 */
858void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
859{
860 struct node_info *ni = node_info;
861 struct mtd_device *dev;
862 char *parts;
863 int i, idx;
864 int noff;
865
866 parts = getenv("mtdparts");
867 if (!parts)
868 return;
869
870 if (mtdparts_init() != 0)
871 return;
872
873 for (i = 0; i < node_info_size; i++) {
874 idx = 0;
875 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
876 while (noff != -FDT_ERR_NOTFOUND) {
877 debug("%s: %s, mtd dev type %d\n",
878 fdt_get_name(blob, noff, 0),
879 ni[i].compat, ni[i].type);
880 dev = device_find(ni[i].type, idx++);
881 if (dev) {
882 if (fdt_node_set_part_info(blob, noff, dev))
883 return; /* return on error */
884 }
885
886 /* Jump to next flash node */
887 noff = fdt_node_offset_by_compatible(blob, noff,
888 ni[i].compat);
889 }
890 }
891}
892#endif
Kumar Gala49b97d92010-03-30 10:19:26 -0500893
894void fdt_del_node_and_alias(void *blob, const char *alias)
895{
896 int off = fdt_path_offset(blob, alias);
897
898 if (off < 0)
899 return;
900
901 fdt_del_node(blob, off);
902
903 off = fdt_path_offset(blob, "/aliases");
904 fdt_delprop(blob, off, alias);
905}
Kumar Galaa0342c02010-06-16 14:27:38 -0500906
907/* Helper to read a big number; size is in cells (not bytes) */
908static inline u64 of_read_number(const __be32 *cell, int size)
909{
910 u64 r = 0;
911 while (size--)
912 r = (r << 32) | be32_to_cpu(*(cell++));
913 return r;
914}
915
Kumar Galaa0342c02010-06-16 14:27:38 -0500916#define PRu64 "%llx"
917
918/* Max address size we deal with */
919#define OF_MAX_ADDR_CELLS 4
920#define OF_BAD_ADDR ((u64)-1)
921#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
922 (ns) > 0)
923
924/* Debug utility */
925#ifdef DEBUG
926static void of_dump_addr(const char *s, const u32 *addr, int na)
927{
928 printf("%s", s);
929 while(na--)
930 printf(" %08x", *(addr++));
931 printf("\n");
932}
933#else
934static void of_dump_addr(const char *s, const u32 *addr, int na) { }
935#endif
936
937/* Callbacks for bus specific translators */
938struct of_bus {
939 const char *name;
940 const char *addresses;
Scott Wood6395f312010-08-12 18:37:39 -0500941 void (*count_cells)(void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -0500942 int *addrc, int *sizec);
943 u64 (*map)(u32 *addr, const u32 *range,
944 int na, int ns, int pna);
945 int (*translate)(u32 *addr, u64 offset, int na);
946};
947
948/* Default translator (generic bus) */
Scott Wood6395f312010-08-12 18:37:39 -0500949static void of_bus_default_count_cells(void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -0500950 int *addrc, int *sizec)
951{
Scott Wood6395f312010-08-12 18:37:39 -0500952 const u32 *prop;
953
954 if (addrc) {
955 prop = fdt_getprop(blob, parentoffset, "#address-cells", NULL);
956 if (prop)
Dirk Behme71ae5f72010-11-21 20:19:34 +0100957 *addrc = be32_to_cpup((u32 *)prop);
Scott Wood6395f312010-08-12 18:37:39 -0500958 else
959 *addrc = 2;
960 }
961
962 if (sizec) {
963 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
964 if (prop)
Dirk Behme71ae5f72010-11-21 20:19:34 +0100965 *sizec = be32_to_cpup((u32 *)prop);
Scott Wood6395f312010-08-12 18:37:39 -0500966 else
967 *sizec = 1;
968 }
Kumar Galaa0342c02010-06-16 14:27:38 -0500969}
970
971static u64 of_bus_default_map(u32 *addr, const u32 *range,
972 int na, int ns, int pna)
973{
974 u64 cp, s, da;
975
976 cp = of_read_number(range, na);
977 s = of_read_number(range + na + pna, ns);
978 da = of_read_number(addr, na);
979
980 debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n",
981 cp, s, da);
982
983 if (da < cp || da >= (cp + s))
984 return OF_BAD_ADDR;
985 return da - cp;
986}
987
988static int of_bus_default_translate(u32 *addr, u64 offset, int na)
989{
990 u64 a = of_read_number(addr, na);
991 memset(addr, 0, na * 4);
992 a += offset;
993 if (na > 1)
994 addr[na - 2] = a >> 32;
995 addr[na - 1] = a & 0xffffffffu;
996
997 return 0;
998}
999
1000/* Array of bus specific translators */
1001static struct of_bus of_busses[] = {
1002 /* Default */
1003 {
1004 .name = "default",
1005 .addresses = "reg",
1006 .count_cells = of_bus_default_count_cells,
1007 .map = of_bus_default_map,
1008 .translate = of_bus_default_translate,
1009 },
1010};
1011
1012static int of_translate_one(void * blob, int parent, struct of_bus *bus,
1013 struct of_bus *pbus, u32 *addr,
1014 int na, int ns, int pna, const char *rprop)
1015{
1016 const u32 *ranges;
1017 int rlen;
1018 int rone;
1019 u64 offset = OF_BAD_ADDR;
1020
1021 /* Normally, an absence of a "ranges" property means we are
1022 * crossing a non-translatable boundary, and thus the addresses
1023 * below the current not cannot be converted to CPU physical ones.
1024 * Unfortunately, while this is very clear in the spec, it's not
1025 * what Apple understood, and they do have things like /uni-n or
1026 * /ht nodes with no "ranges" property and a lot of perfectly
1027 * useable mapped devices below them. Thus we treat the absence of
1028 * "ranges" as equivalent to an empty "ranges" property which means
1029 * a 1:1 translation at that level. It's up to the caller not to try
1030 * to translate addresses that aren't supposed to be translated in
1031 * the first place. --BenH.
1032 */
1033 ranges = (u32 *)fdt_getprop(blob, parent, rprop, &rlen);
1034 if (ranges == NULL || rlen == 0) {
1035 offset = of_read_number(addr, na);
1036 memset(addr, 0, pna * 4);
1037 debug("OF: no ranges, 1:1 translation\n");
1038 goto finish;
1039 }
1040
1041 debug("OF: walking ranges...\n");
1042
1043 /* Now walk through the ranges */
1044 rlen /= 4;
1045 rone = na + pna + ns;
1046 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1047 offset = bus->map(addr, ranges, na, ns, pna);
1048 if (offset != OF_BAD_ADDR)
1049 break;
1050 }
1051 if (offset == OF_BAD_ADDR) {
1052 debug("OF: not found !\n");
1053 return 1;
1054 }
1055 memcpy(addr, ranges + na, 4 * pna);
1056
1057 finish:
1058 of_dump_addr("OF: parent translation for:", addr, pna);
1059 debug("OF: with offset: "PRu64"\n", offset);
1060
1061 /* Translate it into parent bus space */
1062 return pbus->translate(addr, offset, pna);
1063}
1064
1065/*
1066 * Translate an address from the device-tree into a CPU physical address,
1067 * this walks up the tree and applies the various bus mappings on the
1068 * way.
1069 *
1070 * Note: We consider that crossing any level with #size-cells == 0 to mean
1071 * that translation is impossible (that is we are not dealing with a value
1072 * that can be mapped to a cpu physical address). This is not really specified
1073 * that way, but this is traditionally the way IBM at least do things
1074 */
1075u64 __of_translate_address(void *blob, int node_offset, const u32 *in_addr,
1076 const char *rprop)
1077{
1078 int parent;
1079 struct of_bus *bus, *pbus;
1080 u32 addr[OF_MAX_ADDR_CELLS];
1081 int na, ns, pna, pns;
1082 u64 result = OF_BAD_ADDR;
1083
1084 debug("OF: ** translation for device %s **\n",
1085 fdt_get_name(blob, node_offset, NULL));
1086
1087 /* Get parent & match bus type */
1088 parent = fdt_parent_offset(blob, node_offset);
1089 if (parent < 0)
1090 goto bail;
1091 bus = &of_busses[0];
1092
1093 /* Cound address cells & copy address locally */
Scott Wood6395f312010-08-12 18:37:39 -05001094 bus->count_cells(blob, parent, &na, &ns);
Kumar Galaa0342c02010-06-16 14:27:38 -05001095 if (!OF_CHECK_COUNTS(na, ns)) {
1096 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1097 fdt_get_name(blob, node_offset, NULL));
1098 goto bail;
1099 }
1100 memcpy(addr, in_addr, na * 4);
1101
1102 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1103 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1104 of_dump_addr("OF: translating address:", addr, na);
1105
1106 /* Translate */
1107 for (;;) {
1108 /* Switch to parent bus */
1109 node_offset = parent;
1110 parent = fdt_parent_offset(blob, node_offset);
1111
1112 /* If root, we have finished */
1113 if (parent < 0) {
1114 debug("OF: reached root node\n");
1115 result = of_read_number(addr, na);
1116 break;
1117 }
1118
1119 /* Get new parent bus and counts */
1120 pbus = &of_busses[0];
Scott Wood6395f312010-08-12 18:37:39 -05001121 pbus->count_cells(blob, parent, &pna, &pns);
Kumar Galaa0342c02010-06-16 14:27:38 -05001122 if (!OF_CHECK_COUNTS(pna, pns)) {
1123 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1124 fdt_get_name(blob, node_offset, NULL));
1125 break;
1126 }
1127
1128 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1129 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1130
1131 /* Apply bus translation */
1132 if (of_translate_one(blob, node_offset, bus, pbus,
1133 addr, na, ns, pna, rprop))
1134 break;
1135
1136 /* Complete the move up one level */
1137 na = pna;
1138 ns = pns;
1139 bus = pbus;
1140
1141 of_dump_addr("OF: one level translation:", addr, na);
1142 }
1143 bail:
1144
1145 return result;
1146}
1147
1148u64 fdt_translate_address(void *blob, int node_offset, const u32 *in_addr)
1149{
1150 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1151}
Kumar Gala75e73af2010-07-04 12:48:21 -05001152
1153/**
1154 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1155 * who's reg property matches a physical cpu address
1156 *
1157 * @blob: ptr to device tree
1158 * @compat: compatiable string to match
1159 * @compat_off: property name
1160 *
1161 */
1162int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1163 phys_addr_t compat_off)
1164{
1165 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1166 while (off != -FDT_ERR_NOTFOUND) {
1167 u32 *reg = (u32 *)fdt_getprop(blob, off, "reg", &len);
1168 if (reg) {
1169 if (compat_off == fdt_translate_address(blob, off, reg))
1170 return off;
1171 }
1172 off = fdt_node_offset_by_compatible(blob, off, compat);
1173 }
1174
1175 return -FDT_ERR_NOTFOUND;
1176}
1177
Kumar Galab4b847e2010-07-09 16:18:58 -05001178/**
1179 * fdt_alloc_phandle: Return next free phandle value
1180 *
1181 * @blob: ptr to device tree
1182 */
1183int fdt_alloc_phandle(void *blob)
1184{
1185 int offset, len, phandle = 0;
1186 const u32 *val;
Kumar Gala75e73af2010-07-04 12:48:21 -05001187
Kumar Galab4b847e2010-07-09 16:18:58 -05001188 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1189 offset = fdt_next_node(blob, offset, NULL)) {
1190 val = fdt_getprop(blob, offset, "linux,phandle", &len);
1191 if (val)
1192 phandle = max(*val, phandle);
1193 }
1194
1195 return phandle + 1;
1196}
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001197
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001198/*
Kumar Galaf117c0f2011-08-01 00:23:23 -05001199 * fdt_set_phandle: Create a phandle property for the given node
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001200 *
1201 * @fdt: ptr to device tree
1202 * @nodeoffset: node to update
1203 * @phandle: phandle value to set (must be unique)
Kumar Galaf117c0f2011-08-01 00:23:23 -05001204 */
1205int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001206{
1207 int ret;
1208
1209#ifdef DEBUG
1210 int off = fdt_node_offset_by_phandle(fdt, phandle);
1211
1212 if ((off >= 0) && (off != nodeoffset)) {
1213 char buf[64];
1214
1215 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1216 printf("Trying to update node %s with phandle %u ",
1217 buf, phandle);
1218
1219 fdt_get_path(fdt, off, buf, sizeof(buf));
1220 printf("that already exists in node %s.\n", buf);
1221 return -FDT_ERR_BADPHANDLE;
1222 }
1223#endif
1224
1225 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1226 if (ret < 0)
1227 return ret;
1228
1229 /*
1230 * For now, also set the deprecated "linux,phandle" property, so that we
1231 * don't break older kernels.
1232 */
1233 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1234
1235 return ret;
1236}
1237
Kumar Gala10aeabd2011-08-01 00:25:20 -05001238/*
1239 * fdt_create_phandle: Create a phandle property for the given node
1240 *
1241 * @fdt: ptr to device tree
1242 * @nodeoffset: node to update
1243 */
1244int fdt_create_phandle(void *fdt, int nodeoffset)
1245{
1246 /* see if there is a phandle already */
1247 int phandle = fdt_get_phandle(fdt, nodeoffset);
1248
1249 /* if we got 0, means no phandle so create one */
1250 if (phandle == 0) {
1251 phandle = fdt_alloc_phandle(fdt);
1252 fdt_set_phandle(fdt, nodeoffset, phandle);
1253 }
1254
1255 return phandle;
1256}
1257
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001258#if defined(CONFIG_VIDEO)
1259int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1260{
1261 int noff;
1262 int ret;
1263
1264 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1265 if (noff != -FDT_ERR_NOTFOUND) {
1266 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1267add_edid:
1268 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1269 if (ret == -FDT_ERR_NOSPACE) {
1270 ret = fdt_increase_size(blob, 512);
1271 if (!ret)
1272 goto add_edid;
1273 else
1274 goto err_size;
1275 } else if (ret < 0) {
1276 printf("Can't add property: %s\n", fdt_strerror(ret));
1277 return ret;
1278 }
1279 }
1280 return 0;
1281err_size:
1282 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1283 return ret;
1284}
1285#endif
Timur Tabibb682002011-05-03 13:24:07 -05001286
1287/*
1288 * Verify the physical address of device tree node for a given alias
1289 *
1290 * This function locates the device tree node of a given alias, and then
1291 * verifies that the physical address of that device matches the given
1292 * parameter. It displays a message if there is a mismatch.
1293 *
1294 * Returns 1 on success, 0 on failure
1295 */
1296int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1297{
1298 const char *path;
1299 const u32 *reg;
1300 int node, len;
1301 u64 dt_addr;
1302
1303 path = fdt_getprop(fdt, anode, alias, NULL);
1304 if (!path) {
1305 /* If there's no such alias, then it's not a failure */
1306 return 1;
1307 }
1308
1309 node = fdt_path_offset(fdt, path);
1310 if (node < 0) {
1311 printf("Warning: device tree alias '%s' points to invalid "
1312 "node %s.\n", alias, path);
1313 return 0;
1314 }
1315
1316 reg = fdt_getprop(fdt, node, "reg", &len);
1317 if (!reg) {
1318 printf("Warning: device tree node '%s' has no address.\n",
1319 path);
1320 return 0;
1321 }
1322
1323 dt_addr = fdt_translate_address(fdt, node, reg);
1324 if (addr != dt_addr) {
1325 printf("Warning: U-Boot configured device %s at address %llx,\n"
1326 " but the device tree has it address %llx.\n",
1327 alias, addr, dt_addr);
1328 return 0;
1329 }
1330
1331 return 1;
1332}
1333
1334/*
1335 * Returns the base address of an SOC or PCI node
1336 */
1337u64 fdt_get_base_address(void *fdt, int node)
1338{
1339 int size;
1340 u32 naddr;
1341 const u32 *prop;
1342
1343 prop = fdt_getprop(fdt, node, "#address-cells", &size);
1344 if (prop && size == 4)
1345 naddr = *prop;
1346 else
1347 naddr = 2;
1348
1349 prop = fdt_getprop(fdt, node, "ranges", &size);
1350
1351 return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0;
1352}