blob: fcd252336cdf15d8cebe503e4025ef2f07d41b09 [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 *
Shengzhou Liu2a523f52011-10-14 16:26:05 +08005 * Copyright 2010-2011 Freescale Semiconductor, Inc.
Kumar Galaa0342c02010-06-16 14:27:38 -05006 *
Wolfgang Denk1a459662013-07-08 09:37:19 +02007 * SPDX-License-Identifier: GPL-2.0+
Gerald Van Baren64dbbd42007-04-06 14:19:43 -04008 */
9
10#include <common.h>
Anton Vorontsov3e303f72009-10-15 17:47:04 +040011#include <stdio_dev.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040012#include <linux/ctype.h>
13#include <linux/types.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040014#include <asm/global_data.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040015#include <libfdt.h>
16#include <fdt_support.h>
Kumar Gala151c8b02007-11-26 17:06:15 -060017#include <exports.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040018
19/*
20 * Global data (for the gd->bd)
21 */
22DECLARE_GLOBAL_DATA_PTR;
23
David Fengf77a6062013-12-14 11:47:29 +080024/*
25 * Get cells len in bytes
26 * if #NNNN-cells property is 2 then len is 8
27 * otherwise len is 4
28 */
29static int get_cells_len(void *blob, char *nr_cells_name)
30{
31 const fdt32_t *cell;
32
33 cell = fdt_getprop(blob, 0, nr_cells_name, NULL);
34 if (cell && fdt32_to_cpu(*cell) == 2)
35 return 8;
36
37 return 4;
38}
39
40/*
41 * Write a 4 or 8 byte big endian cell
42 */
43static void write_cell(u8 *addr, u64 val, int size)
44{
45 int shift = (size - 1) * 8;
46 while (size-- > 0) {
47 *addr++ = (val >> shift) & 0xff;
48 shift -= 8;
49 }
50}
51
Kumar Gala3bed2aa2008-10-23 00:05:47 -050052/**
Alexander Graf94fb1822014-04-11 17:09:40 +020053 * fdt_getprop_u32_default_node - Return a node's property or a default
54 *
55 * @fdt: ptr to device tree
56 * @off: offset of node
57 * @cell: cell offset in property
58 * @prop: property name
59 * @dflt: default value if the property isn't found
60 *
61 * Convenience function to return a node's property or a default value if
62 * the property doesn't exist.
63 */
64u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
65 const char *prop, const u32 dflt)
66{
67 const fdt32_t *val;
68 int len;
69
70 val = fdt_getprop(fdt, off, prop, &len);
71
72 /* Check if property exists */
73 if (!val)
74 return dflt;
75
76 /* Check if property is long enough */
77 if (len < ((cell + 1) * sizeof(uint32_t)))
78 return dflt;
79
80 return fdt32_to_cpu(*val);
81}
82
83/**
Kumar Gala3bed2aa2008-10-23 00:05:47 -050084 * fdt_getprop_u32_default - Find a node and return it's property or a default
85 *
86 * @fdt: ptr to device tree
87 * @path: path of node
88 * @prop: property name
89 * @dflt: default value if the property isn't found
90 *
91 * Convenience function to find a node and return it's property or a
92 * default value if it doesn't exist.
93 */
Gabe Black07e12782011-11-08 01:09:44 -080094u32 fdt_getprop_u32_default(const void *fdt, const char *path,
95 const char *prop, const u32 dflt)
Kumar Gala3bed2aa2008-10-23 00:05:47 -050096{
Kumar Gala3bed2aa2008-10-23 00:05:47 -050097 int off;
98
99 off = fdt_path_offset(fdt, path);
100 if (off < 0)
101 return dflt;
102
Alexander Graf94fb1822014-04-11 17:09:40 +0200103 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt);
Kumar Gala3bed2aa2008-10-23 00:05:47 -0500104}
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400105
Kumar Galaa3c29332007-10-24 10:21:57 -0500106/**
107 * fdt_find_and_setprop: Find a node and set it's property
108 *
109 * @fdt: ptr to device tree
110 * @node: path of node
111 * @prop: property name
112 * @val: ptr to new value
113 * @len: length of new property value
114 * @create: flag to create the property if it doesn't exist
115 *
116 * Convenience function to directly set a property given the path to the node.
117 */
118int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
119 const void *val, int len, int create)
120{
Kumar Gala8d04f022007-10-24 11:04:22 -0500121 int nodeoff = fdt_path_offset(fdt, node);
Kumar Galaa3c29332007-10-24 10:21:57 -0500122
123 if (nodeoff < 0)
124 return nodeoff;
125
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000126 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
Kumar Galaa3c29332007-10-24 10:21:57 -0500127 return 0; /* create flag not set; so exit quietly */
128
129 return fdt_setprop(fdt, nodeoff, prop, val, len);
130}
131
Kumar Gala151c8b02007-11-26 17:06:15 -0600132#ifdef CONFIG_OF_STDOUT_VIA_ALIAS
Anton Vorontsov3e303f72009-10-15 17:47:04 +0400133
Marek Vasut036036d2012-09-14 23:45:51 +0200134#ifdef CONFIG_CONS_INDEX
Anton Vorontsov3e303f72009-10-15 17:47:04 +0400135static void fdt_fill_multisername(char *sername, size_t maxlen)
136{
137 const char *outname = stdio_devices[stdout]->name;
138
139 if (strcmp(outname, "serial") > 0)
140 strncpy(sername, outname, maxlen);
141
142 /* eserial? */
143 if (strcmp(outname + 1, "serial") > 0)
144 strncpy(sername, outname + 1, maxlen);
145}
Marek Vasut036036d2012-09-14 23:45:51 +0200146#endif
Anton Vorontsov3e303f72009-10-15 17:47:04 +0400147
Detlev Zundel40777812008-06-20 22:24:05 +0200148static int fdt_fixup_stdout(void *fdt, int chosenoff)
Kumar Gala151c8b02007-11-26 17:06:15 -0600149{
150 int err = 0;
151#ifdef CONFIG_CONS_INDEX
152 int node;
153 char sername[9] = { 0 };
154 const char *path;
155
Anton Vorontsov3e303f72009-10-15 17:47:04 +0400156 fdt_fill_multisername(sername, sizeof(sername) - 1);
157 if (!sername[0])
158 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
Kumar Gala151c8b02007-11-26 17:06:15 -0600159
160 err = node = fdt_path_offset(fdt, "/aliases");
161 if (node >= 0) {
162 int len;
163 path = fdt_getprop(fdt, node, sername, &len);
164 if (path) {
165 char *p = malloc(len);
166 err = -FDT_ERR_NOSPACE;
167 if (p) {
168 memcpy(p, path, len);
Detlev Zundel40777812008-06-20 22:24:05 +0200169 err = fdt_setprop(fdt, chosenoff,
Kumar Gala151c8b02007-11-26 17:06:15 -0600170 "linux,stdout-path", p, len);
171 free(p);
172 }
173 } else {
174 err = len;
175 }
176 }
177#endif
178 if (err < 0)
179 printf("WARNING: could not set linux,stdout-path %s.\n",
180 fdt_strerror(err));
181
182 return err;
183}
184#endif
185
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500186int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end, int force)
187{
David Fengf77a6062013-12-14 11:47:29 +0800188 int nodeoffset, addr_cell_len;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500189 int err, j, total;
David Fengf77a6062013-12-14 11:47:29 +0800190 fdt64_t tmp;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500191 const char *path;
192 uint64_t addr, size;
193
194 /* Find the "chosen" node. */
195 nodeoffset = fdt_path_offset (fdt, "/chosen");
196
197 /* If there is no "chosen" node in the blob return */
198 if (nodeoffset < 0) {
199 printf("fdt_initrd: %s\n", fdt_strerror(nodeoffset));
200 return nodeoffset;
201 }
202
203 /* just return if initrd_start/end aren't valid */
204 if ((initrd_start == 0) || (initrd_end == 0))
205 return 0;
206
207 total = fdt_num_mem_rsv(fdt);
208
209 /*
210 * Look for an existing entry and update it. If we don't find
211 * the entry, we will j be the next available slot.
212 */
213 for (j = 0; j < total; j++) {
214 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
215 if (addr == initrd_start) {
216 fdt_del_mem_rsv(fdt, j);
217 break;
218 }
219 }
220
Grant Likelyce6b27a2011-03-28 09:58:55 +0000221 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500222 if (err < 0) {
223 printf("fdt_initrd: %s\n", fdt_strerror(err));
224 return err;
225 }
226
David Fengf77a6062013-12-14 11:47:29 +0800227 addr_cell_len = get_cells_len(fdt, "#address-cells");
228
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500229 path = fdt_getprop(fdt, nodeoffset, "linux,initrd-start", NULL);
230 if ((path == NULL) || force) {
David Fengf77a6062013-12-14 11:47:29 +0800231 write_cell((u8 *)&tmp, initrd_start, addr_cell_len);
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500232 err = fdt_setprop(fdt, nodeoffset,
Tom Rinibe6d4262014-01-20 17:45:33 -0500233 "linux,initrd-start", &tmp, addr_cell_len);
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500234 if (err < 0) {
235 printf("WARNING: "
236 "could not set linux,initrd-start %s.\n",
237 fdt_strerror(err));
238 return err;
239 }
David Fengf77a6062013-12-14 11:47:29 +0800240 write_cell((u8 *)&tmp, initrd_end, addr_cell_len);
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500241 err = fdt_setprop(fdt, nodeoffset,
Tom Rinibe6d4262014-01-20 17:45:33 -0500242 "linux,initrd-end", &tmp, addr_cell_len);
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500243 if (err < 0) {
244 printf("WARNING: could not set linux,initrd-end %s.\n",
245 fdt_strerror(err));
246
247 return err;
248 }
249 }
250
251 return 0;
252}
253
Heiko Schocher56844a22008-09-11 08:11:23 +0200254int fdt_chosen(void *fdt, int force)
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400255{
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400256 int nodeoffset;
257 int err;
Gerald Van Baren35ec3982007-05-25 22:08:57 -0400258 char *str; /* used to set string properties */
Gerald Van Barenb60af3d2007-12-29 22:45:27 -0500259 const char *path;
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400260
261 err = fdt_check_header(fdt);
262 if (err < 0) {
Gerald Van Baren5fe6be62007-08-07 21:14:22 -0400263 printf("fdt_chosen: %s\n", fdt_strerror(err));
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400264 return err;
265 }
266
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400267 /*
268 * Find the "chosen" node.
269 */
Kumar Gala8d04f022007-10-24 11:04:22 -0500270 nodeoffset = fdt_path_offset (fdt, "/chosen");
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400271
272 /*
Gerald Van Barenb60af3d2007-12-29 22:45:27 -0500273 * If there is no "chosen" node in the blob, create it.
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400274 */
275 if (nodeoffset < 0) {
276 /*
277 * Create a new node "/chosen" (offset 0 is root level)
278 */
279 nodeoffset = fdt_add_subnode(fdt, 0, "chosen");
280 if (nodeoffset < 0) {
Gerald Van Baren5fe6be62007-08-07 21:14:22 -0400281 printf("WARNING: could not create /chosen %s.\n",
Gerald Van Baren35ec3982007-05-25 22:08:57 -0400282 fdt_strerror(nodeoffset));
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400283 return nodeoffset;
284 }
285 }
286
287 /*
Gerald Van Barenb60af3d2007-12-29 22:45:27 -0500288 * Create /chosen properites that don't exist in the fdt.
289 * If the property exists, update it only if the "force" parameter
290 * is true.
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400291 */
292 str = getenv("bootargs");
293 if (str != NULL) {
Gerald Van Barenb60af3d2007-12-29 22:45:27 -0500294 path = fdt_getprop(fdt, nodeoffset, "bootargs", NULL);
295 if ((path == NULL) || force) {
296 err = fdt_setprop(fdt, nodeoffset,
297 "bootargs", str, strlen(str)+1);
298 if (err < 0)
299 printf("WARNING: could not set bootargs %s.\n",
300 fdt_strerror(err));
301 }
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400302 }
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500303
Kumar Gala151c8b02007-11-26 17:06:15 -0600304#ifdef CONFIG_OF_STDOUT_VIA_ALIAS
Gerald Van Barenb60af3d2007-12-29 22:45:27 -0500305 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
306 if ((path == NULL) || force)
307 err = fdt_fixup_stdout(fdt, nodeoffset);
Kumar Gala151c8b02007-11-26 17:06:15 -0600308#endif
309
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400310#ifdef OF_STDOUT_PATH
Gerald Van Barenb60af3d2007-12-29 22:45:27 -0500311 path = fdt_getprop(fdt, nodeoffset, "linux,stdout-path", NULL);
312 if ((path == NULL) || force) {
313 err = fdt_setprop(fdt, nodeoffset,
314 "linux,stdout-path", OF_STDOUT_PATH, strlen(OF_STDOUT_PATH)+1);
315 if (err < 0)
316 printf("WARNING: could not set linux,stdout-path %s.\n",
317 fdt_strerror(err));
318 }
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400319#endif
320
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400321 return err;
322}
323
Kumar Galae93becf2007-11-03 19:46:28 -0500324void do_fixup_by_path(void *fdt, const char *path, const char *prop,
325 const void *val, int len, int create)
326{
327#if defined(DEBUG)
328 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600329 debug("Updating property '%s/%s' = ", path, prop);
Kumar Galae93becf2007-11-03 19:46:28 -0500330 for (i = 0; i < len; i++)
331 debug(" %.2x", *(u8*)(val+i));
332 debug("\n");
333#endif
334 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
335 if (rc)
336 printf("Unable to update property %s:%s, err=%s\n",
337 path, prop, fdt_strerror(rc));
338}
339
340void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
341 u32 val, int create)
342{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000343 fdt32_t tmp = cpu_to_fdt32(val);
344 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
Kumar Galae93becf2007-11-03 19:46:28 -0500345}
346
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600347void do_fixup_by_prop(void *fdt,
348 const char *pname, const void *pval, int plen,
349 const char *prop, const void *val, int len,
350 int create)
351{
352 int off;
353#if defined(DEBUG)
354 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600355 debug("Updating property '%s' = ", prop);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600356 for (i = 0; i < len; i++)
357 debug(" %.2x", *(u8*)(val+i));
358 debug("\n");
359#endif
360 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
361 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000362 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600363 fdt_setprop(fdt, off, prop, val, len);
364 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
365 }
366}
367
368void do_fixup_by_prop_u32(void *fdt,
369 const char *pname, const void *pval, int plen,
370 const char *prop, u32 val, int create)
371{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000372 fdt32_t tmp = cpu_to_fdt32(val);
373 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600374}
375
376void do_fixup_by_compat(void *fdt, const char *compat,
377 const char *prop, const void *val, int len, int create)
378{
379 int off = -1;
380#if defined(DEBUG)
381 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600382 debug("Updating property '%s' = ", prop);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600383 for (i = 0; i < len; i++)
384 debug(" %.2x", *(u8*)(val+i));
385 debug("\n");
386#endif
387 off = fdt_node_offset_by_compatible(fdt, -1, compat);
388 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000389 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600390 fdt_setprop(fdt, off, prop, val, len);
391 off = fdt_node_offset_by_compatible(fdt, off, compat);
392 }
393}
394
395void do_fixup_by_compat_u32(void *fdt, const char *compat,
396 const char *prop, u32 val, int create)
397{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000398 fdt32_t tmp = cpu_to_fdt32(val);
399 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600400}
401
Doug Anderson5e574542013-04-30 10:22:00 +0000402#ifdef CONFIG_NR_DRAM_BANKS
403#define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
404#else
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000405#define MEMORY_BANKS_MAX 4
Doug Anderson5e574542013-04-30 10:22:00 +0000406#endif
John Rigbya6bd9e82010-10-13 13:57:33 -0600407int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
408{
409 int err, nodeoffset;
410 int addr_cell_len, size_cell_len, len;
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000411 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
John Rigbya6bd9e82010-10-13 13:57:33 -0600412 int bank;
Kumar Gala3c927282007-11-26 14:57:45 -0600413
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000414 if (banks > MEMORY_BANKS_MAX) {
415 printf("%s: num banks %d exceeds hardcoded limit %d."
416 " Recompile with higher MEMORY_BANKS_MAX?\n",
417 __FUNCTION__, banks, MEMORY_BANKS_MAX);
418 return -1;
419 }
420
Kumar Gala3c927282007-11-26 14:57:45 -0600421 err = fdt_check_header(blob);
422 if (err < 0) {
423 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
424 return err;
425 }
426
427 /* update, or add and update /memory node */
428 nodeoffset = fdt_path_offset(blob, "/memory");
429 if (nodeoffset < 0) {
430 nodeoffset = fdt_add_subnode(blob, 0, "memory");
Miao Yan35940de2013-11-28 17:51:39 +0800431 if (nodeoffset < 0) {
Kumar Gala3c927282007-11-26 14:57:45 -0600432 printf("WARNING: could not create /memory: %s.\n",
433 fdt_strerror(nodeoffset));
Miao Yan35940de2013-11-28 17:51:39 +0800434 return nodeoffset;
435 }
Kumar Gala3c927282007-11-26 14:57:45 -0600436 }
437 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
438 sizeof("memory"));
439 if (err < 0) {
440 printf("WARNING: could not set %s %s.\n", "device_type",
441 fdt_strerror(err));
442 return err;
443 }
444
John Rigbya6bd9e82010-10-13 13:57:33 -0600445 addr_cell_len = get_cells_len(blob, "#address-cells");
446 size_cell_len = get_cells_len(blob, "#size-cells");
Kumar Gala3c927282007-11-26 14:57:45 -0600447
John Rigbya6bd9e82010-10-13 13:57:33 -0600448 for (bank = 0, len = 0; bank < banks; bank++) {
449 write_cell(tmp + len, start[bank], addr_cell_len);
450 len += addr_cell_len;
451
452 write_cell(tmp + len, size[bank], size_cell_len);
453 len += size_cell_len;
Kumar Gala3c927282007-11-26 14:57:45 -0600454 }
455
456 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
457 if (err < 0) {
458 printf("WARNING: could not set %s %s.\n",
459 "reg", fdt_strerror(err));
460 return err;
461 }
462 return 0;
463}
464
John Rigbya6bd9e82010-10-13 13:57:33 -0600465int fdt_fixup_memory(void *blob, u64 start, u64 size)
466{
467 return fdt_fixup_memory_banks(blob, &start, &size, 1);
468}
469
Kumar Galaba37aa02008-08-19 15:41:18 -0500470void fdt_fixup_ethernet(void *fdt)
Kumar Galaab544632007-11-21 11:11:03 -0600471{
Kumar Galaba37aa02008-08-19 15:41:18 -0500472 int node, i, j;
473 char enet[16], *tmp, *end;
Stephen Warren064d55f2013-05-27 18:01:19 +0000474 char mac[16];
Kumar Galaab544632007-11-21 11:11:03 -0600475 const char *path;
Kumar Galaba37aa02008-08-19 15:41:18 -0500476 unsigned char mac_addr[6];
Kumar Galaab544632007-11-21 11:11:03 -0600477
478 node = fdt_path_offset(fdt, "/aliases");
Kumar Galaba37aa02008-08-19 15:41:18 -0500479 if (node < 0)
480 return;
481
482 i = 0;
Stephen Warren064d55f2013-05-27 18:01:19 +0000483 strcpy(mac, "ethaddr");
Kumar Galaba37aa02008-08-19 15:41:18 -0500484 while ((tmp = getenv(mac)) != NULL) {
485 sprintf(enet, "ethernet%d", i);
486 path = fdt_getprop(fdt, node, enet, NULL);
487 if (!path) {
488 debug("No alias for %s\n", enet);
489 sprintf(mac, "eth%daddr", ++i);
490 continue;
Kumar Galaab544632007-11-21 11:11:03 -0600491 }
Kumar Galaba37aa02008-08-19 15:41:18 -0500492
493 for (j = 0; j < 6; j++) {
494 mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
495 if (tmp)
496 tmp = (*end) ? end+1 : end;
Kumar Galaab544632007-11-21 11:11:03 -0600497 }
Kumar Galaba37aa02008-08-19 15:41:18 -0500498
499 do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0);
500 do_fixup_by_path(fdt, path, "local-mac-address",
501 &mac_addr, 6, 1);
502
503 sprintf(mac, "eth%daddr", ++i);
Kumar Galaab544632007-11-21 11:11:03 -0600504 }
505}
Anton Vorontsov18e69a32008-03-14 23:20:18 +0300506
Kumar Gala3082d232008-08-15 08:24:42 -0500507/* Resize the fdt to its actual size + a bit of padding */
508int fdt_resize(void *blob)
509{
510 int i;
511 uint64_t addr, size;
512 int total, ret;
513 uint actualsize;
514
515 if (!blob)
516 return 0;
517
518 total = fdt_num_mem_rsv(blob);
519 for (i = 0; i < total; i++) {
520 fdt_get_mem_rsv(blob, i, &addr, &size);
Simon Glass92549352011-09-17 06:48:58 +0000521 if (addr == (uintptr_t)blob) {
Kumar Gala3082d232008-08-15 08:24:42 -0500522 fdt_del_mem_rsv(blob, i);
523 break;
524 }
525 }
526
Peter Korsgaardf242a082008-10-28 08:26:52 +0100527 /*
528 * Calculate the actual size of the fdt
Feng Wang3840ebf2010-08-03 16:22:43 +0200529 * plus the size needed for 5 fdt_add_mem_rsv, one
530 * for the fdt itself and 4 for a possible initrd
531 * ((initrd-start + initrd-end) * 2 (name & value))
Peter Korsgaardf242a082008-10-28 08:26:52 +0100532 */
Kumar Gala3082d232008-08-15 08:24:42 -0500533 actualsize = fdt_off_dt_strings(blob) +
Feng Wang3840ebf2010-08-03 16:22:43 +0200534 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
Kumar Gala3082d232008-08-15 08:24:42 -0500535
536 /* Make it so the fdt ends on a page boundary */
Simon Glass92549352011-09-17 06:48:58 +0000537 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
538 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
Kumar Gala3082d232008-08-15 08:24:42 -0500539
540 /* Change the fdt header to reflect the correct size */
541 fdt_set_totalsize(blob, actualsize);
542
543 /* Add the new reservation */
Simon Glass92549352011-09-17 06:48:58 +0000544 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize);
Kumar Gala3082d232008-08-15 08:24:42 -0500545 if (ret < 0)
546 return ret;
547
548 return actualsize;
549}
Kumar Gala8ab451c2008-10-22 23:33:56 -0500550
551#ifdef CONFIG_PCI
Kumar Galacfd700b2009-08-05 09:03:54 -0500552#define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
Kumar Gala8ab451c2008-10-22 23:33:56 -0500553
554#define FDT_PCI_PREFETCH (0x40000000)
555#define FDT_PCI_MEM32 (0x02000000)
556#define FDT_PCI_IO (0x01000000)
557#define FDT_PCI_MEM64 (0x03000000)
558
559int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
560
561 int addrcell, sizecell, len, r;
562 u32 *dma_range;
563 /* sized based on pci addr cells, size-cells, & address-cells */
564 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
565
566 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
567 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
568
569 dma_range = &dma_ranges[0];
570 for (r = 0; r < hose->region_count; r++) {
571 u64 bus_start, phys_start, size;
572
Kumar Galaff4e66e2009-02-06 09:49:31 -0600573 /* skip if !PCI_REGION_SYS_MEMORY */
574 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
Kumar Gala8ab451c2008-10-22 23:33:56 -0500575 continue;
576
577 bus_start = (u64)hose->regions[r].bus_start;
578 phys_start = (u64)hose->regions[r].phys_start;
579 size = (u64)hose->regions[r].size;
580
581 dma_range[0] = 0;
Kumar Galacfd700b2009-08-05 09:03:54 -0500582 if (size >= 0x100000000ull)
Kumar Gala8ab451c2008-10-22 23:33:56 -0500583 dma_range[0] |= FDT_PCI_MEM64;
584 else
585 dma_range[0] |= FDT_PCI_MEM32;
586 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
587 dma_range[0] |= FDT_PCI_PREFETCH;
588#ifdef CONFIG_SYS_PCI_64BIT
589 dma_range[1] = bus_start >> 32;
590#else
591 dma_range[1] = 0;
592#endif
593 dma_range[2] = bus_start & 0xffffffff;
594
595 if (addrcell == 2) {
596 dma_range[3] = phys_start >> 32;
597 dma_range[4] = phys_start & 0xffffffff;
598 } else {
599 dma_range[3] = phys_start & 0xffffffff;
600 }
601
602 if (sizecell == 2) {
603 dma_range[3 + addrcell + 0] = size >> 32;
604 dma_range[3 + addrcell + 1] = size & 0xffffffff;
605 } else {
606 dma_range[3 + addrcell + 0] = size & 0xffffffff;
607 }
608
609 dma_range += (3 + addrcell + sizecell);
610 }
611
612 len = dma_range - &dma_ranges[0];
613 if (len)
614 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
615
616 return 0;
617}
618#endif
Stefan Roese30d45c02009-10-21 11:59:52 +0200619
620#ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
621/*
Stefan Roese8a805df2010-09-16 14:01:53 +0200622 * Provide a weak default function to return the flash bank size.
623 * There might be multiple non-identical flash chips connected to one
624 * chip-select, so we need to pass an index as well.
625 */
626u32 __flash_get_bank_size(int cs, int idx)
627{
628 extern flash_info_t flash_info[];
629
630 /*
631 * As default, a simple 1:1 mapping is provided. Boards with
632 * a different mapping need to supply a board specific mapping
633 * routine.
634 */
635 return flash_info[cs].size;
636}
637u32 flash_get_bank_size(int cs, int idx)
638 __attribute__((weak, alias("__flash_get_bank_size")));
639
640/*
Stefan Roese30d45c02009-10-21 11:59:52 +0200641 * This function can be used to update the size in the "reg" property
Stefan Roese8a805df2010-09-16 14:01:53 +0200642 * of all NOR FLASH device nodes. This is necessary for boards with
Stefan Roese30d45c02009-10-21 11:59:52 +0200643 * non-fixed NOR FLASH sizes.
644 */
Stefan Roese8a805df2010-09-16 14:01:53 +0200645int fdt_fixup_nor_flash_size(void *blob)
Stefan Roese30d45c02009-10-21 11:59:52 +0200646{
647 char compat[][16] = { "cfi-flash", "jedec-flash" };
648 int off;
649 int len;
650 struct fdt_property *prop;
Stefan Roese2778a012010-09-24 13:51:50 +0200651 u32 *reg, *reg2;
Stefan Roese30d45c02009-10-21 11:59:52 +0200652 int i;
653
654 for (i = 0; i < 2; i++) {
655 off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
656 while (off != -FDT_ERR_NOTFOUND) {
Stefan Roese8a805df2010-09-16 14:01:53 +0200657 int idx;
658
Stefan Roese30d45c02009-10-21 11:59:52 +0200659 /*
Stefan Roese8a805df2010-09-16 14:01:53 +0200660 * Found one compatible node, so fixup the size
661 * int its reg properties
Stefan Roese30d45c02009-10-21 11:59:52 +0200662 */
663 prop = fdt_get_property_w(blob, off, "reg", &len);
664 if (prop) {
Stefan Roese8a805df2010-09-16 14:01:53 +0200665 int tuple_size = 3 * sizeof(reg);
Stefan Roese30d45c02009-10-21 11:59:52 +0200666
Stefan Roese8a805df2010-09-16 14:01:53 +0200667 /*
668 * There might be multiple reg-tuples,
669 * so loop through them all
670 */
Stefan Roese2778a012010-09-24 13:51:50 +0200671 reg = reg2 = (u32 *)&prop->data[0];
672 for (idx = 0; idx < (len / tuple_size); idx++) {
Stefan Roese8a805df2010-09-16 14:01:53 +0200673 /*
674 * Update size in reg property
675 */
676 reg[2] = flash_get_bank_size(reg[0],
677 idx);
Stefan Roese2778a012010-09-24 13:51:50 +0200678
679 /*
680 * Point to next reg tuple
681 */
682 reg += 3;
Stefan Roese30d45c02009-10-21 11:59:52 +0200683 }
Stefan Roese2778a012010-09-24 13:51:50 +0200684
685 fdt_setprop(blob, off, "reg", reg2, len);
Stefan Roese30d45c02009-10-21 11:59:52 +0200686 }
687
688 /* Move to next compatible node */
689 off = fdt_node_offset_by_compatible(blob, off,
690 compat[i]);
691 }
692 }
693
Stefan Roese8a805df2010-09-16 14:01:53 +0200694 return 0;
Stefan Roese30d45c02009-10-21 11:59:52 +0200695}
696#endif
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100697
Matthew McClintockcb2707a2010-10-13 13:39:26 +0200698int fdt_increase_size(void *fdt, int add_len)
699{
700 int newlen;
701
702 newlen = fdt_totalsize(fdt) + add_len;
703
704 /* Open in place with a new len */
705 return fdt_open_into(fdt, fdt, newlen);
706}
707
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100708#ifdef CONFIG_FDT_FIXUP_PARTITIONS
709#include <jffs2/load_kernel.h>
710#include <mtd_node.h>
711
712struct reg_cell {
713 unsigned int r0;
714 unsigned int r1;
715};
716
717int fdt_del_subnodes(const void *blob, int parent_offset)
718{
719 int off, ndepth;
720 int ret;
721
722 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
723 (off >= 0) && (ndepth > 0);
724 off = fdt_next_node(blob, off, &ndepth)) {
725 if (ndepth == 1) {
726 debug("delete %s: offset: %x\n",
727 fdt_get_name(blob, off, 0), off);
728 ret = fdt_del_node((void *)blob, off);
729 if (ret < 0) {
730 printf("Can't delete node: %s\n",
731 fdt_strerror(ret));
732 return ret;
733 } else {
734 ndepth = 0;
735 off = parent_offset;
736 }
737 }
738 }
739 return 0;
740}
741
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100742int fdt_del_partitions(void *blob, int parent_offset)
743{
744 const void *prop;
745 int ndepth = 0;
746 int off;
747 int ret;
748
749 off = fdt_next_node(blob, parent_offset, &ndepth);
750 if (off > 0 && ndepth == 1) {
751 prop = fdt_getprop(blob, off, "label", NULL);
752 if (prop == NULL) {
753 /*
754 * Could not find label property, nand {}; node?
755 * Check subnode, delete partitions there if any.
756 */
757 return fdt_del_partitions(blob, off);
758 } else {
759 ret = fdt_del_subnodes(blob, parent_offset);
760 if (ret < 0) {
761 printf("Can't remove subnodes: %s\n",
762 fdt_strerror(ret));
763 return ret;
764 }
765 }
766 }
767 return 0;
768}
769
770int fdt_node_set_part_info(void *blob, int parent_offset,
771 struct mtd_device *dev)
772{
773 struct list_head *pentry;
774 struct part_info *part;
775 struct reg_cell cell;
776 int off, ndepth = 0;
777 int part_num, ret;
778 char buf[64];
779
780 ret = fdt_del_partitions(blob, parent_offset);
781 if (ret < 0)
782 return ret;
783
784 /*
785 * Check if it is nand {}; subnode, adjust
786 * the offset in this case
787 */
788 off = fdt_next_node(blob, parent_offset, &ndepth);
789 if (off > 0 && ndepth == 1)
790 parent_offset = off;
791
792 part_num = 0;
793 list_for_each_prev(pentry, &dev->parts) {
794 int newoff;
795
796 part = list_entry(pentry, struct part_info, link);
797
Scott Wood06503f12013-10-15 17:41:27 -0500798 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100799 part_num, part->name, part->size,
800 part->offset, part->mask_flags);
801
Scott Wood06503f12013-10-15 17:41:27 -0500802 sprintf(buf, "partition@%llx", part->offset);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100803add_sub:
804 ret = fdt_add_subnode(blob, parent_offset, buf);
805 if (ret == -FDT_ERR_NOSPACE) {
806 ret = fdt_increase_size(blob, 512);
807 if (!ret)
808 goto add_sub;
809 else
810 goto err_size;
811 } else if (ret < 0) {
812 printf("Can't add partition node: %s\n",
813 fdt_strerror(ret));
814 return ret;
815 }
816 newoff = ret;
817
818 /* Check MTD_WRITEABLE_CMD flag */
819 if (part->mask_flags & 1) {
820add_ro:
821 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
822 if (ret == -FDT_ERR_NOSPACE) {
823 ret = fdt_increase_size(blob, 512);
824 if (!ret)
825 goto add_ro;
826 else
827 goto err_size;
828 } else if (ret < 0)
829 goto err_prop;
830 }
831
832 cell.r0 = cpu_to_fdt32(part->offset);
833 cell.r1 = cpu_to_fdt32(part->size);
834add_reg:
835 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
836 if (ret == -FDT_ERR_NOSPACE) {
837 ret = fdt_increase_size(blob, 512);
838 if (!ret)
839 goto add_reg;
840 else
841 goto err_size;
842 } else if (ret < 0)
843 goto err_prop;
844
845add_label:
846 ret = fdt_setprop_string(blob, newoff, "label", part->name);
847 if (ret == -FDT_ERR_NOSPACE) {
848 ret = fdt_increase_size(blob, 512);
849 if (!ret)
850 goto add_label;
851 else
852 goto err_size;
853 } else if (ret < 0)
854 goto err_prop;
855
856 part_num++;
857 }
858 return 0;
859err_size:
860 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
861 return ret;
862err_prop:
863 printf("Can't add property: %s\n", fdt_strerror(ret));
864 return ret;
865}
866
867/*
868 * Update partitions in nor/nand nodes using info from
869 * mtdparts environment variable. The nodes to update are
870 * specified by node_info structure which contains mtd device
871 * type and compatible string: E. g. the board code in
872 * ft_board_setup() could use:
873 *
874 * struct node_info nodes[] = {
875 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
876 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
877 * };
878 *
879 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
880 */
881void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
882{
883 struct node_info *ni = node_info;
884 struct mtd_device *dev;
885 char *parts;
886 int i, idx;
887 int noff;
888
889 parts = getenv("mtdparts");
890 if (!parts)
891 return;
892
893 if (mtdparts_init() != 0)
894 return;
895
896 for (i = 0; i < node_info_size; i++) {
897 idx = 0;
898 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
899 while (noff != -FDT_ERR_NOTFOUND) {
900 debug("%s: %s, mtd dev type %d\n",
901 fdt_get_name(blob, noff, 0),
902 ni[i].compat, ni[i].type);
903 dev = device_find(ni[i].type, idx++);
904 if (dev) {
905 if (fdt_node_set_part_info(blob, noff, dev))
906 return; /* return on error */
907 }
908
909 /* Jump to next flash node */
910 noff = fdt_node_offset_by_compatible(blob, noff,
911 ni[i].compat);
912 }
913 }
914}
915#endif
Kumar Gala49b97d92010-03-30 10:19:26 -0500916
917void fdt_del_node_and_alias(void *blob, const char *alias)
918{
919 int off = fdt_path_offset(blob, alias);
920
921 if (off < 0)
922 return;
923
924 fdt_del_node(blob, off);
925
926 off = fdt_path_offset(blob, "/aliases");
927 fdt_delprop(blob, off, alias);
928}
Kumar Galaa0342c02010-06-16 14:27:38 -0500929
930/* Helper to read a big number; size is in cells (not bytes) */
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000931static inline u64 of_read_number(const fdt32_t *cell, int size)
Kumar Galaa0342c02010-06-16 14:27:38 -0500932{
933 u64 r = 0;
934 while (size--)
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000935 r = (r << 32) | fdt32_to_cpu(*(cell++));
Kumar Galaa0342c02010-06-16 14:27:38 -0500936 return r;
937}
938
Kumar Galaa0342c02010-06-16 14:27:38 -0500939#define PRu64 "%llx"
940
941/* Max address size we deal with */
942#define OF_MAX_ADDR_CELLS 4
943#define OF_BAD_ADDR ((u64)-1)
944#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
945 (ns) > 0)
946
947/* Debug utility */
948#ifdef DEBUG
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000949static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -0500950{
951 printf("%s", s);
952 while(na--)
953 printf(" %08x", *(addr++));
954 printf("\n");
955}
956#else
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000957static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
Kumar Galaa0342c02010-06-16 14:27:38 -0500958#endif
959
960/* Callbacks for bus specific translators */
961struct of_bus {
962 const char *name;
963 const char *addresses;
Scott Wood6395f312010-08-12 18:37:39 -0500964 void (*count_cells)(void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -0500965 int *addrc, int *sizec);
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000966 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -0500967 int na, int ns, int pna);
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000968 int (*translate)(fdt32_t *addr, u64 offset, int na);
Kumar Galaa0342c02010-06-16 14:27:38 -0500969};
970
971/* Default translator (generic bus) */
Scott Wood6395f312010-08-12 18:37:39 -0500972static void of_bus_default_count_cells(void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -0500973 int *addrc, int *sizec)
974{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000975 const fdt32_t *prop;
Scott Wood6395f312010-08-12 18:37:39 -0500976
977 if (addrc) {
978 prop = fdt_getprop(blob, parentoffset, "#address-cells", NULL);
979 if (prop)
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000980 *addrc = be32_to_cpup(prop);
Scott Wood6395f312010-08-12 18:37:39 -0500981 else
982 *addrc = 2;
983 }
984
985 if (sizec) {
986 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
987 if (prop)
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000988 *sizec = be32_to_cpup(prop);
Scott Wood6395f312010-08-12 18:37:39 -0500989 else
990 *sizec = 1;
991 }
Kumar Galaa0342c02010-06-16 14:27:38 -0500992}
993
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000994static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -0500995 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
1003 debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n",
1004 cp, s, da);
1005
1006 if (da < cp || da >= (cp + s))
1007 return OF_BAD_ADDR;
1008 return da - cp;
1009}
1010
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001011static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -05001012{
1013 u64 a = of_read_number(addr, na);
1014 memset(addr, 0, na * 4);
1015 a += offset;
1016 if (na > 1)
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001017 addr[na - 2] = cpu_to_fdt32(a >> 32);
1018 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
Kumar Galaa0342c02010-06-16 14:27:38 -05001019
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,
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001036 struct of_bus *pbus, fdt32_t *addr,
Kumar Galaa0342c02010-06-16 14:27:38 -05001037 int na, int ns, int pna, const char *rprop)
1038{
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001039 const fdt32_t *ranges;
Kumar Galaa0342c02010-06-16 14:27:38 -05001040 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 */
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001056 ranges = fdt_getprop(blob, parent, rprop, &rlen);
Kumar Galaa0342c02010-06-16 14:27:38 -05001057 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);
1082 debug("OF: with offset: "PRu64"\n", offset);
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 */
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001098static u64 __of_translate_address(void *blob, int node_offset, const fdt32_t *in_addr,
1099 const char *rprop)
Kumar Galaa0342c02010-06-16 14:27:38 -05001100{
1101 int parent;
1102 struct of_bus *bus, *pbus;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001103 fdt32_t addr[OF_MAX_ADDR_CELLS];
Kumar Galaa0342c02010-06-16 14:27:38 -05001104 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 */
Scott Wood6395f312010-08-12 18:37:39 -05001117 bus->count_cells(blob, parent, &na, &ns);
Kumar Galaa0342c02010-06-16 14:27:38 -05001118 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];
Scott Wood6395f312010-08-12 18:37:39 -05001144 pbus->count_cells(blob, parent, &pna, &pns);
Kumar Galaa0342c02010-06-16 14:27:38 -05001145 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
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001171u64 fdt_translate_address(void *blob, int node_offset, const fdt32_t *in_addr)
Kumar Galaa0342c02010-06-16 14:27:38 -05001172{
1173 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1174}
Kumar Gala75e73af2010-07-04 12:48:21 -05001175
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) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001190 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
Kumar Gala75e73af2010-07-04 12:48:21 -05001191 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
Kumar Galab4b847e2010-07-09 16:18:58 -05001201/**
1202 * fdt_alloc_phandle: Return next free phandle value
1203 *
1204 * @blob: ptr to device tree
1205 */
1206int fdt_alloc_phandle(void *blob)
1207{
Timur Tabi50bf17b2011-09-20 18:24:35 -05001208 int offset, phandle = 0;
Kumar Gala75e73af2010-07-04 12:48:21 -05001209
Kumar Galab4b847e2010-07-09 16:18:58 -05001210 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1211 offset = fdt_next_node(blob, offset, NULL)) {
Timur Tabi50bf17b2011-09-20 18:24:35 -05001212 phandle = max(phandle, fdt_get_phandle(blob, offset));
Kumar Galab4b847e2010-07-09 16:18:58 -05001213 }
1214
1215 return phandle + 1;
1216}
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001217
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001218/*
Kumar Galaf117c0f2011-08-01 00:23:23 -05001219 * fdt_set_phandle: Create a phandle property for the given node
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001220 *
1221 * @fdt: ptr to device tree
1222 * @nodeoffset: node to update
1223 * @phandle: phandle value to set (must be unique)
Kumar Galaf117c0f2011-08-01 00:23:23 -05001224 */
1225int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001226{
1227 int ret;
1228
1229#ifdef DEBUG
1230 int off = fdt_node_offset_by_phandle(fdt, phandle);
1231
1232 if ((off >= 0) && (off != nodeoffset)) {
1233 char buf[64];
1234
1235 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1236 printf("Trying to update node %s with phandle %u ",
1237 buf, phandle);
1238
1239 fdt_get_path(fdt, off, buf, sizeof(buf));
1240 printf("that already exists in node %s.\n", buf);
1241 return -FDT_ERR_BADPHANDLE;
1242 }
1243#endif
1244
1245 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1246 if (ret < 0)
1247 return ret;
1248
1249 /*
1250 * For now, also set the deprecated "linux,phandle" property, so that we
1251 * don't break older kernels.
1252 */
1253 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1254
1255 return ret;
1256}
1257
Kumar Gala10aeabd2011-08-01 00:25:20 -05001258/*
1259 * fdt_create_phandle: Create a phandle property for the given node
1260 *
1261 * @fdt: ptr to device tree
1262 * @nodeoffset: node to update
1263 */
Timur Tabi3c927cc2011-09-20 18:24:34 -05001264unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
Kumar Gala10aeabd2011-08-01 00:25:20 -05001265{
1266 /* see if there is a phandle already */
1267 int phandle = fdt_get_phandle(fdt, nodeoffset);
1268
1269 /* if we got 0, means no phandle so create one */
1270 if (phandle == 0) {
Timur Tabi3c927cc2011-09-20 18:24:34 -05001271 int ret;
1272
Kumar Gala10aeabd2011-08-01 00:25:20 -05001273 phandle = fdt_alloc_phandle(fdt);
Timur Tabi3c927cc2011-09-20 18:24:34 -05001274 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1275 if (ret < 0) {
1276 printf("Can't set phandle %u: %s\n", phandle,
1277 fdt_strerror(ret));
1278 return 0;
1279 }
Kumar Gala10aeabd2011-08-01 00:25:20 -05001280 }
1281
1282 return phandle;
1283}
1284
Shengzhou Liu2a523f52011-10-14 16:26:05 +08001285/*
1286 * fdt_set_node_status: Set status for the given node
1287 *
1288 * @fdt: ptr to device tree
1289 * @nodeoffset: node to update
1290 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1291 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1292 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1293 */
1294int fdt_set_node_status(void *fdt, int nodeoffset,
1295 enum fdt_status status, unsigned int error_code)
1296{
1297 char buf[16];
1298 int ret = 0;
1299
1300 if (nodeoffset < 0)
1301 return nodeoffset;
1302
1303 switch (status) {
1304 case FDT_STATUS_OKAY:
1305 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1306 break;
1307 case FDT_STATUS_DISABLED:
1308 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1309 break;
1310 case FDT_STATUS_FAIL:
1311 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1312 break;
1313 case FDT_STATUS_FAIL_ERROR_CODE:
1314 sprintf(buf, "fail-%d", error_code);
1315 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1316 break;
1317 default:
1318 printf("Invalid fdt status: %x\n", status);
1319 ret = -1;
1320 break;
1321 }
1322
1323 return ret;
1324}
1325
1326/*
1327 * fdt_set_status_by_alias: Set status for the given node given an alias
1328 *
1329 * @fdt: ptr to device tree
1330 * @alias: alias of node to update
1331 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1332 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1333 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1334 */
1335int fdt_set_status_by_alias(void *fdt, const char* alias,
1336 enum fdt_status status, unsigned int error_code)
1337{
1338 int offset = fdt_path_offset(fdt, alias);
1339
1340 return fdt_set_node_status(fdt, offset, status, error_code);
1341}
1342
Tom Wai-Hong Tam096eb3f2012-12-05 14:46:41 +00001343#if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001344int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1345{
1346 int noff;
1347 int ret;
1348
1349 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1350 if (noff != -FDT_ERR_NOTFOUND) {
1351 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1352add_edid:
1353 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1354 if (ret == -FDT_ERR_NOSPACE) {
1355 ret = fdt_increase_size(blob, 512);
1356 if (!ret)
1357 goto add_edid;
1358 else
1359 goto err_size;
1360 } else if (ret < 0) {
1361 printf("Can't add property: %s\n", fdt_strerror(ret));
1362 return ret;
1363 }
1364 }
1365 return 0;
1366err_size:
1367 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1368 return ret;
1369}
1370#endif
Timur Tabibb682002011-05-03 13:24:07 -05001371
1372/*
1373 * Verify the physical address of device tree node for a given alias
1374 *
1375 * This function locates the device tree node of a given alias, and then
1376 * verifies that the physical address of that device matches the given
1377 * parameter. It displays a message if there is a mismatch.
1378 *
1379 * Returns 1 on success, 0 on failure
1380 */
1381int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1382{
1383 const char *path;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001384 const fdt32_t *reg;
Timur Tabibb682002011-05-03 13:24:07 -05001385 int node, len;
1386 u64 dt_addr;
1387
1388 path = fdt_getprop(fdt, anode, alias, NULL);
1389 if (!path) {
1390 /* If there's no such alias, then it's not a failure */
1391 return 1;
1392 }
1393
1394 node = fdt_path_offset(fdt, path);
1395 if (node < 0) {
1396 printf("Warning: device tree alias '%s' points to invalid "
1397 "node %s.\n", alias, path);
1398 return 0;
1399 }
1400
1401 reg = fdt_getprop(fdt, node, "reg", &len);
1402 if (!reg) {
1403 printf("Warning: device tree node '%s' has no address.\n",
1404 path);
1405 return 0;
1406 }
1407
1408 dt_addr = fdt_translate_address(fdt, node, reg);
1409 if (addr != dt_addr) {
1410 printf("Warning: U-Boot configured device %s at address %llx,\n"
1411 " but the device tree has it address %llx.\n",
1412 alias, addr, dt_addr);
1413 return 0;
1414 }
1415
1416 return 1;
1417}
1418
1419/*
1420 * Returns the base address of an SOC or PCI node
1421 */
1422u64 fdt_get_base_address(void *fdt, int node)
1423{
1424 int size;
1425 u32 naddr;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001426 const fdt32_t *prop;
Timur Tabibb682002011-05-03 13:24:07 -05001427
1428 prop = fdt_getprop(fdt, node, "#address-cells", &size);
1429 if (prop && size == 4)
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001430 naddr = be32_to_cpup(prop);
Timur Tabibb682002011-05-03 13:24:07 -05001431 else
1432 naddr = 2;
1433
1434 prop = fdt_getprop(fdt, node, "ranges", &size);
1435
1436 return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0;
1437}
Alexander Grafc48e6862014-04-11 17:09:41 +02001438
1439/*
1440 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1441 */
1442static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1443 uint64_t *val, int cells)
1444{
1445 const fdt32_t *prop32 = &prop[cell_off];
1446 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];
1447
1448 if ((cell_off + cells) > prop_len)
1449 return -FDT_ERR_NOSPACE;
1450
1451 switch (cells) {
1452 case 1:
1453 *val = fdt32_to_cpu(*prop32);
1454 break;
1455 case 2:
1456 *val = fdt64_to_cpu(*prop64);
1457 break;
1458 default:
1459 return -FDT_ERR_NOSPACE;
1460 }
1461
1462 return 0;
1463}
1464
1465/**
1466 * fdt_read_range - Read a node's n'th range property
1467 *
1468 * @fdt: ptr to device tree
1469 * @node: offset of node
1470 * @n: range index
1471 * @child_addr: pointer to storage for the "child address" field
1472 * @addr: pointer to storage for the CPU view translated physical start
1473 * @len: pointer to storage for the range length
1474 *
1475 * Convenience function that reads and interprets a specific range out of
1476 * a number of the "ranges" property array.
1477 */
1478int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1479 uint64_t *addr, uint64_t *len)
1480{
1481 int pnode = fdt_parent_offset(fdt, node);
1482 const fdt32_t *ranges;
1483 int pacells;
1484 int acells;
1485 int scells;
1486 int ranges_len;
1487 int cell = 0;
1488 int r = 0;
1489
1490 /*
1491 * The "ranges" property is an array of
1492 * { <child address> <parent address> <size in child address space> }
1493 *
1494 * All 3 elements can span a diffent number of cells. Fetch their size.
1495 */
1496 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1497 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1498 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1499
1500 /* Now try to get the ranges property */
1501 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1502 if (!ranges)
1503 return -FDT_ERR_NOTFOUND;
1504 ranges_len /= sizeof(uint32_t);
1505
1506 /* Jump to the n'th entry */
1507 cell = n * (pacells + acells + scells);
1508
1509 /* Read <child address> */
1510 if (child_addr) {
1511 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1512 acells);
1513 if (r)
1514 return r;
1515 }
1516 cell += acells;
1517
1518 /* Read <parent address> */
1519 if (addr)
1520 *addr = fdt_translate_address(fdt, node, ranges + cell);
1521 cell += pacells;
1522
1523 /* Read <size in child address space> */
1524 if (len) {
1525 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
1526 if (r)
1527 return r;
1528 }
1529
1530 return 0;
1531}