blob: 3f641566b977aff76275656c86093051d2b1217c [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/*
David Fengf77a6062013-12-14 11:47:29 +080020 * Get cells len in bytes
21 * if #NNNN-cells property is 2 then len is 8
22 * otherwise len is 4
23 */
Masahiro Yamadaf89d4822014-04-18 17:41:02 +090024static int get_cells_len(const void *fdt, const char *nr_cells_name)
David Fengf77a6062013-12-14 11:47:29 +080025{
26 const fdt32_t *cell;
27
Masahiro Yamadaf89d4822014-04-18 17:41:02 +090028 cell = fdt_getprop(fdt, 0, nr_cells_name, NULL);
David Fengf77a6062013-12-14 11:47:29 +080029 if (cell && fdt32_to_cpu(*cell) == 2)
30 return 8;
31
32 return 4;
33}
34
Kumar Gala3bed2aa2008-10-23 00:05:47 -050035/**
Alexander Graf94fb1822014-04-11 17:09:40 +020036 * fdt_getprop_u32_default_node - Return a node's property or a default
37 *
38 * @fdt: ptr to device tree
39 * @off: offset of node
40 * @cell: cell offset in property
41 * @prop: property name
42 * @dflt: default value if the property isn't found
43 *
44 * Convenience function to return a node's property or a default value if
45 * the property doesn't exist.
46 */
47u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
48 const char *prop, const u32 dflt)
49{
50 const fdt32_t *val;
51 int len;
52
53 val = fdt_getprop(fdt, off, prop, &len);
54
55 /* Check if property exists */
56 if (!val)
57 return dflt;
58
59 /* Check if property is long enough */
60 if (len < ((cell + 1) * sizeof(uint32_t)))
61 return dflt;
62
63 return fdt32_to_cpu(*val);
64}
65
66/**
Kumar Gala3bed2aa2008-10-23 00:05:47 -050067 * fdt_getprop_u32_default - Find a node and return it's property or a default
68 *
69 * @fdt: ptr to device tree
70 * @path: path of node
71 * @prop: property name
72 * @dflt: default value if the property isn't found
73 *
74 * Convenience function to find a node and return it's property or a
75 * default value if it doesn't exist.
76 */
Gabe Black07e12782011-11-08 01:09:44 -080077u32 fdt_getprop_u32_default(const void *fdt, const char *path,
78 const char *prop, const u32 dflt)
Kumar Gala3bed2aa2008-10-23 00:05:47 -050079{
Kumar Gala3bed2aa2008-10-23 00:05:47 -050080 int off;
81
82 off = fdt_path_offset(fdt, path);
83 if (off < 0)
84 return dflt;
85
Alexander Graf94fb1822014-04-11 17:09:40 +020086 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt);
Kumar Gala3bed2aa2008-10-23 00:05:47 -050087}
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040088
Kumar Galaa3c29332007-10-24 10:21:57 -050089/**
90 * fdt_find_and_setprop: Find a node and set it's property
91 *
92 * @fdt: ptr to device tree
93 * @node: path of node
94 * @prop: property name
95 * @val: ptr to new value
96 * @len: length of new property value
97 * @create: flag to create the property if it doesn't exist
98 *
99 * Convenience function to directly set a property given the path to the node.
100 */
101int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
102 const void *val, int len, int create)
103{
Kumar Gala8d04f022007-10-24 11:04:22 -0500104 int nodeoff = fdt_path_offset(fdt, node);
Kumar Galaa3c29332007-10-24 10:21:57 -0500105
106 if (nodeoff < 0)
107 return nodeoff;
108
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000109 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
Kumar Galaa3c29332007-10-24 10:21:57 -0500110 return 0; /* create flag not set; so exit quietly */
111
112 return fdt_setprop(fdt, nodeoff, prop, val, len);
113}
114
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900115/**
116 * fdt_find_or_add_subnode - find or possibly add a subnode of a given node
117 * @fdt: pointer to the device tree blob
118 * @parentoffset: structure block offset of a node
119 * @name: name of the subnode to locate
120 *
121 * fdt_subnode_offset() finds a subnode of the node with a given name.
122 * If the subnode does not exist, it will be created.
123 */
124static int fdt_find_or_add_subnode(void *fdt, int parentoffset,
125 const char *name)
126{
127 int offset;
128
129 offset = fdt_subnode_offset(fdt, parentoffset, name);
130
131 if (offset == -FDT_ERR_NOTFOUND)
132 offset = fdt_add_subnode(fdt, parentoffset, name);
133
134 if (offset < 0)
135 printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset));
136
137 return offset;
138}
139
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900140/* rename to CONFIG_OF_STDOUT_PATH ? */
141#if defined(OF_STDOUT_PATH)
142static int fdt_fixup_stdout(void *fdt, int chosenoff)
143{
144 return fdt_setprop(fdt, chosenoff, "linux,stdout-path",
145 OF_STDOUT_PATH, strlen(OF_STDOUT_PATH) + 1);
146}
147#elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
Anton Vorontsov3e303f72009-10-15 17:47:04 +0400148static void fdt_fill_multisername(char *sername, size_t maxlen)
149{
150 const char *outname = stdio_devices[stdout]->name;
151
152 if (strcmp(outname, "serial") > 0)
153 strncpy(sername, outname, maxlen);
154
155 /* eserial? */
156 if (strcmp(outname + 1, "serial") > 0)
157 strncpy(sername, outname + 1, maxlen);
158}
Anton Vorontsov3e303f72009-10-15 17:47:04 +0400159
Detlev Zundel40777812008-06-20 22:24:05 +0200160static int fdt_fixup_stdout(void *fdt, int chosenoff)
Kumar Gala151c8b02007-11-26 17:06:15 -0600161{
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900162 int err;
163 int aliasoff;
Kumar Gala151c8b02007-11-26 17:06:15 -0600164 char sername[9] = { 0 };
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900165 const void *path;
166 int len;
167 char tmp[256]; /* long enough */
Kumar Gala151c8b02007-11-26 17:06:15 -0600168
Anton Vorontsov3e303f72009-10-15 17:47:04 +0400169 fdt_fill_multisername(sername, sizeof(sername) - 1);
170 if (!sername[0])
171 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
Kumar Gala151c8b02007-11-26 17:06:15 -0600172
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900173 aliasoff = fdt_path_offset(fdt, "/aliases");
174 if (aliasoff < 0) {
175 err = aliasoff;
176 goto error;
Kumar Gala151c8b02007-11-26 17:06:15 -0600177 }
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900178
179 path = fdt_getprop(fdt, aliasoff, sername, &len);
180 if (!path) {
181 err = len;
182 goto error;
183 }
184
185 /* fdt_setprop may break "path" so we copy it to tmp buffer */
186 memcpy(tmp, path, len);
187
188 err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len);
189error:
Kumar Gala151c8b02007-11-26 17:06:15 -0600190 if (err < 0)
191 printf("WARNING: could not set linux,stdout-path %s.\n",
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900192 fdt_strerror(err));
Kumar Gala151c8b02007-11-26 17:06:15 -0600193
194 return err;
195}
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900196#else
197static int fdt_fixup_stdout(void *fdt, int chosenoff)
198{
199 return 0;
200}
Kumar Gala151c8b02007-11-26 17:06:15 -0600201#endif
202
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900203static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name,
204 uint64_t val, int is_u64)
205{
206 if (is_u64)
207 return fdt_setprop_u64(fdt, nodeoffset, name, val);
208 else
209 return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val);
210}
211
212
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900213int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end)
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500214{
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900215 int nodeoffset;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500216 int err, j, total;
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900217 int is_u64;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500218 uint64_t addr, size;
219
Masahiro Yamada50babaf2014-04-18 17:41:05 +0900220 /* just return if the size of initrd is zero */
221 if (initrd_start == initrd_end)
222 return 0;
223
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900224 /* find or create "/chosen" node. */
225 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
226 if (nodeoffset < 0)
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500227 return nodeoffset;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500228
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500229 total = fdt_num_mem_rsv(fdt);
230
231 /*
232 * Look for an existing entry and update it. If we don't find
233 * the entry, we will j be the next available slot.
234 */
235 for (j = 0; j < total; j++) {
236 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
237 if (addr == initrd_start) {
238 fdt_del_mem_rsv(fdt, j);
239 break;
240 }
241 }
242
Grant Likelyce6b27a2011-03-28 09:58:55 +0000243 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500244 if (err < 0) {
245 printf("fdt_initrd: %s\n", fdt_strerror(err));
246 return err;
247 }
248
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900249 is_u64 = (get_cells_len(fdt, "#address-cells") == 8);
David Fengf77a6062013-12-14 11:47:29 +0800250
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900251 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start",
252 (uint64_t)initrd_start, is_u64);
253
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900254 if (err < 0) {
255 printf("WARNING: could not set linux,initrd-start %s.\n",
256 fdt_strerror(err));
257 return err;
258 }
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900259
260 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end",
261 (uint64_t)initrd_end, is_u64);
262
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900263 if (err < 0) {
264 printf("WARNING: could not set linux,initrd-end %s.\n",
265 fdt_strerror(err));
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500266
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900267 return err;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500268 }
269
270 return 0;
271}
272
Masahiro Yamadabc6ed0f2014-04-18 17:41:00 +0900273int fdt_chosen(void *fdt)
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400274{
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400275 int nodeoffset;
276 int err;
Gerald Van Baren35ec3982007-05-25 22:08:57 -0400277 char *str; /* used to set string properties */
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400278
279 err = fdt_check_header(fdt);
280 if (err < 0) {
Gerald Van Baren5fe6be62007-08-07 21:14:22 -0400281 printf("fdt_chosen: %s\n", fdt_strerror(err));
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400282 return err;
283 }
284
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900285 /* find or create "/chosen" node. */
286 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
287 if (nodeoffset < 0)
288 return nodeoffset;
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400289
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400290 str = getenv("bootargs");
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900291 if (str) {
292 err = fdt_setprop(fdt, nodeoffset, "bootargs", str,
293 strlen(str) + 1);
294 if (err < 0) {
Masahiro Yamadabc6ed0f2014-04-18 17:41:00 +0900295 printf("WARNING: could not set bootargs %s.\n",
296 fdt_strerror(err));
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900297 return err;
298 }
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400299 }
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500300
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900301 return fdt_fixup_stdout(fdt, nodeoffset);
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400302}
303
Kumar Galae93becf2007-11-03 19:46:28 -0500304void do_fixup_by_path(void *fdt, const char *path, const char *prop,
305 const void *val, int len, int create)
306{
307#if defined(DEBUG)
308 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600309 debug("Updating property '%s/%s' = ", path, prop);
Kumar Galae93becf2007-11-03 19:46:28 -0500310 for (i = 0; i < len; i++)
311 debug(" %.2x", *(u8*)(val+i));
312 debug("\n");
313#endif
314 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
315 if (rc)
316 printf("Unable to update property %s:%s, err=%s\n",
317 path, prop, fdt_strerror(rc));
318}
319
320void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
321 u32 val, int create)
322{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000323 fdt32_t tmp = cpu_to_fdt32(val);
324 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
Kumar Galae93becf2007-11-03 19:46:28 -0500325}
326
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600327void do_fixup_by_prop(void *fdt,
328 const char *pname, const void *pval, int plen,
329 const char *prop, const void *val, int len,
330 int create)
331{
332 int off;
333#if defined(DEBUG)
334 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600335 debug("Updating property '%s' = ", prop);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600336 for (i = 0; i < len; i++)
337 debug(" %.2x", *(u8*)(val+i));
338 debug("\n");
339#endif
340 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
341 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000342 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600343 fdt_setprop(fdt, off, prop, val, len);
344 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
345 }
346}
347
348void do_fixup_by_prop_u32(void *fdt,
349 const char *pname, const void *pval, int plen,
350 const char *prop, u32 val, int create)
351{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000352 fdt32_t tmp = cpu_to_fdt32(val);
353 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600354}
355
356void do_fixup_by_compat(void *fdt, const char *compat,
357 const char *prop, const void *val, int len, int create)
358{
359 int off = -1;
360#if defined(DEBUG)
361 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600362 debug("Updating property '%s' = ", prop);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600363 for (i = 0; i < len; i++)
364 debug(" %.2x", *(u8*)(val+i));
365 debug("\n");
366#endif
367 off = fdt_node_offset_by_compatible(fdt, -1, compat);
368 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000369 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600370 fdt_setprop(fdt, off, prop, val, len);
371 off = fdt_node_offset_by_compatible(fdt, off, compat);
372 }
373}
374
375void do_fixup_by_compat_u32(void *fdt, const char *compat,
376 const char *prop, u32 val, int create)
377{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000378 fdt32_t tmp = cpu_to_fdt32(val);
379 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600380}
381
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900382/*
383 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
384 */
385static int fdt_pack_reg(const void *fdt, void *buf, uint64_t *address,
386 uint64_t *size, int n)
387{
388 int i;
389 int address_len = get_cells_len(fdt, "#address-cells");
390 int size_len = get_cells_len(fdt, "#size-cells");
391 char *p = buf;
392
393 for (i = 0; i < n; i++) {
394 if (address_len == 8)
395 *(fdt64_t *)p = cpu_to_fdt64(address[i]);
396 else
397 *(fdt32_t *)p = cpu_to_fdt32(address[i]);
398 p += address_len;
399
400 if (size_len == 8)
401 *(fdt64_t *)p = cpu_to_fdt64(size[i]);
402 else
403 *(fdt32_t *)p = cpu_to_fdt32(size[i]);
404 p += size_len;
405 }
406
407 return p - (char *)buf;
408}
409
Doug Anderson5e574542013-04-30 10:22:00 +0000410#ifdef CONFIG_NR_DRAM_BANKS
411#define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
412#else
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000413#define MEMORY_BANKS_MAX 4
Doug Anderson5e574542013-04-30 10:22:00 +0000414#endif
John Rigbya6bd9e82010-10-13 13:57:33 -0600415int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
416{
417 int err, nodeoffset;
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900418 int len;
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000419 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
Kumar Gala3c927282007-11-26 14:57:45 -0600420
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000421 if (banks > MEMORY_BANKS_MAX) {
422 printf("%s: num banks %d exceeds hardcoded limit %d."
423 " Recompile with higher MEMORY_BANKS_MAX?\n",
424 __FUNCTION__, banks, MEMORY_BANKS_MAX);
425 return -1;
426 }
427
Kumar Gala3c927282007-11-26 14:57:45 -0600428 err = fdt_check_header(blob);
429 if (err < 0) {
430 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
431 return err;
432 }
433
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900434 /* find or create "/memory" node. */
435 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
436 if (nodeoffset < 0)
Miao Yan35940de2013-11-28 17:51:39 +0800437 return nodeoffset;
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900438
Kumar Gala3c927282007-11-26 14:57:45 -0600439 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
440 sizeof("memory"));
441 if (err < 0) {
442 printf("WARNING: could not set %s %s.\n", "device_type",
443 fdt_strerror(err));
444 return err;
445 }
446
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900447 len = fdt_pack_reg(blob, tmp, start, size, banks);
Kumar Gala3c927282007-11-26 14:57:45 -0600448
449 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
450 if (err < 0) {
451 printf("WARNING: could not set %s %s.\n",
452 "reg", fdt_strerror(err));
453 return err;
454 }
455 return 0;
456}
457
John Rigbya6bd9e82010-10-13 13:57:33 -0600458int fdt_fixup_memory(void *blob, u64 start, u64 size)
459{
460 return fdt_fixup_memory_banks(blob, &start, &size, 1);
461}
462
Kumar Galaba37aa02008-08-19 15:41:18 -0500463void fdt_fixup_ethernet(void *fdt)
Kumar Galaab544632007-11-21 11:11:03 -0600464{
Kumar Galaba37aa02008-08-19 15:41:18 -0500465 int node, i, j;
466 char enet[16], *tmp, *end;
Stephen Warren064d55f2013-05-27 18:01:19 +0000467 char mac[16];
Kumar Galaab544632007-11-21 11:11:03 -0600468 const char *path;
Kumar Galaba37aa02008-08-19 15:41:18 -0500469 unsigned char mac_addr[6];
Kumar Galaab544632007-11-21 11:11:03 -0600470
471 node = fdt_path_offset(fdt, "/aliases");
Kumar Galaba37aa02008-08-19 15:41:18 -0500472 if (node < 0)
473 return;
474
Dan Murphyb1f49ab2013-10-02 14:00:15 -0500475 if (!getenv("ethaddr")) {
476 if (getenv("usbethaddr")) {
477 strcpy(mac, "usbethaddr");
478 } else {
479 debug("No ethernet MAC Address defined\n");
480 return;
481 }
482 } else {
483 strcpy(mac, "ethaddr");
484 }
485
Kumar Galaba37aa02008-08-19 15:41:18 -0500486 i = 0;
487 while ((tmp = getenv(mac)) != NULL) {
488 sprintf(enet, "ethernet%d", i);
489 path = fdt_getprop(fdt, node, enet, NULL);
490 if (!path) {
491 debug("No alias for %s\n", enet);
492 sprintf(mac, "eth%daddr", ++i);
493 continue;
Kumar Galaab544632007-11-21 11:11:03 -0600494 }
Kumar Galaba37aa02008-08-19 15:41:18 -0500495
496 for (j = 0; j < 6; j++) {
497 mac_addr[j] = tmp ? simple_strtoul(tmp, &end, 16) : 0;
498 if (tmp)
499 tmp = (*end) ? end+1 : end;
Kumar Galaab544632007-11-21 11:11:03 -0600500 }
Kumar Galaba37aa02008-08-19 15:41:18 -0500501
502 do_fixup_by_path(fdt, path, "mac-address", &mac_addr, 6, 0);
503 do_fixup_by_path(fdt, path, "local-mac-address",
504 &mac_addr, 6, 1);
505
506 sprintf(mac, "eth%daddr", ++i);
Kumar Galaab544632007-11-21 11:11:03 -0600507 }
508}
Anton Vorontsov18e69a32008-03-14 23:20:18 +0300509
Kumar Gala3082d232008-08-15 08:24:42 -0500510/* Resize the fdt to its actual size + a bit of padding */
Simon Glass5bf58cc2014-07-30 03:59:02 -0600511int fdt_shrink_to_minimum(void *blob)
Kumar Gala3082d232008-08-15 08:24:42 -0500512{
513 int i;
514 uint64_t addr, size;
515 int total, ret;
516 uint actualsize;
517
518 if (!blob)
519 return 0;
520
521 total = fdt_num_mem_rsv(blob);
522 for (i = 0; i < total; i++) {
523 fdt_get_mem_rsv(blob, i, &addr, &size);
Simon Glass92549352011-09-17 06:48:58 +0000524 if (addr == (uintptr_t)blob) {
Kumar Gala3082d232008-08-15 08:24:42 -0500525 fdt_del_mem_rsv(blob, i);
526 break;
527 }
528 }
529
Peter Korsgaardf242a082008-10-28 08:26:52 +0100530 /*
531 * Calculate the actual size of the fdt
Feng Wang3840ebf2010-08-03 16:22:43 +0200532 * plus the size needed for 5 fdt_add_mem_rsv, one
533 * for the fdt itself and 4 for a possible initrd
534 * ((initrd-start + initrd-end) * 2 (name & value))
Peter Korsgaardf242a082008-10-28 08:26:52 +0100535 */
Kumar Gala3082d232008-08-15 08:24:42 -0500536 actualsize = fdt_off_dt_strings(blob) +
Feng Wang3840ebf2010-08-03 16:22:43 +0200537 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
Kumar Gala3082d232008-08-15 08:24:42 -0500538
539 /* Make it so the fdt ends on a page boundary */
Simon Glass92549352011-09-17 06:48:58 +0000540 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
541 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
Kumar Gala3082d232008-08-15 08:24:42 -0500542
543 /* Change the fdt header to reflect the correct size */
544 fdt_set_totalsize(blob, actualsize);
545
546 /* Add the new reservation */
Simon Glass92549352011-09-17 06:48:58 +0000547 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize);
Kumar Gala3082d232008-08-15 08:24:42 -0500548 if (ret < 0)
549 return ret;
550
551 return actualsize;
552}
Kumar Gala8ab451c2008-10-22 23:33:56 -0500553
554#ifdef CONFIG_PCI
Kumar Galacfd700b2009-08-05 09:03:54 -0500555#define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
Kumar Gala8ab451c2008-10-22 23:33:56 -0500556
557#define FDT_PCI_PREFETCH (0x40000000)
558#define FDT_PCI_MEM32 (0x02000000)
559#define FDT_PCI_IO (0x01000000)
560#define FDT_PCI_MEM64 (0x03000000)
561
562int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
563
564 int addrcell, sizecell, len, r;
565 u32 *dma_range;
566 /* sized based on pci addr cells, size-cells, & address-cells */
567 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
568
569 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
570 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
571
572 dma_range = &dma_ranges[0];
573 for (r = 0; r < hose->region_count; r++) {
574 u64 bus_start, phys_start, size;
575
Kumar Galaff4e66e2009-02-06 09:49:31 -0600576 /* skip if !PCI_REGION_SYS_MEMORY */
577 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
Kumar Gala8ab451c2008-10-22 23:33:56 -0500578 continue;
579
580 bus_start = (u64)hose->regions[r].bus_start;
581 phys_start = (u64)hose->regions[r].phys_start;
582 size = (u64)hose->regions[r].size;
583
584 dma_range[0] = 0;
Kumar Galacfd700b2009-08-05 09:03:54 -0500585 if (size >= 0x100000000ull)
Kumar Gala8ab451c2008-10-22 23:33:56 -0500586 dma_range[0] |= FDT_PCI_MEM64;
587 else
588 dma_range[0] |= FDT_PCI_MEM32;
589 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
590 dma_range[0] |= FDT_PCI_PREFETCH;
591#ifdef CONFIG_SYS_PCI_64BIT
592 dma_range[1] = bus_start >> 32;
593#else
594 dma_range[1] = 0;
595#endif
596 dma_range[2] = bus_start & 0xffffffff;
597
598 if (addrcell == 2) {
599 dma_range[3] = phys_start >> 32;
600 dma_range[4] = phys_start & 0xffffffff;
601 } else {
602 dma_range[3] = phys_start & 0xffffffff;
603 }
604
605 if (sizecell == 2) {
606 dma_range[3 + addrcell + 0] = size >> 32;
607 dma_range[3 + addrcell + 1] = size & 0xffffffff;
608 } else {
609 dma_range[3 + addrcell + 0] = size & 0xffffffff;
610 }
611
612 dma_range += (3 + addrcell + sizecell);
613 }
614
615 len = dma_range - &dma_ranges[0];
616 if (len)
617 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
618
619 return 0;
620}
621#endif
Stefan Roese30d45c02009-10-21 11:59:52 +0200622
623#ifdef CONFIG_FDT_FIXUP_NOR_FLASH_SIZE
624/*
Stefan Roese8a805df2010-09-16 14:01:53 +0200625 * Provide a weak default function to return the flash bank size.
626 * There might be multiple non-identical flash chips connected to one
627 * chip-select, so we need to pass an index as well.
628 */
629u32 __flash_get_bank_size(int cs, int idx)
630{
631 extern flash_info_t flash_info[];
632
633 /*
634 * As default, a simple 1:1 mapping is provided. Boards with
635 * a different mapping need to supply a board specific mapping
636 * routine.
637 */
638 return flash_info[cs].size;
639}
640u32 flash_get_bank_size(int cs, int idx)
641 __attribute__((weak, alias("__flash_get_bank_size")));
642
643/*
Stefan Roese30d45c02009-10-21 11:59:52 +0200644 * This function can be used to update the size in the "reg" property
Stefan Roese8a805df2010-09-16 14:01:53 +0200645 * of all NOR FLASH device nodes. This is necessary for boards with
Stefan Roese30d45c02009-10-21 11:59:52 +0200646 * non-fixed NOR FLASH sizes.
647 */
Stefan Roese8a805df2010-09-16 14:01:53 +0200648int fdt_fixup_nor_flash_size(void *blob)
Stefan Roese30d45c02009-10-21 11:59:52 +0200649{
650 char compat[][16] = { "cfi-flash", "jedec-flash" };
651 int off;
652 int len;
653 struct fdt_property *prop;
Stefan Roese2778a012010-09-24 13:51:50 +0200654 u32 *reg, *reg2;
Stefan Roese30d45c02009-10-21 11:59:52 +0200655 int i;
656
657 for (i = 0; i < 2; i++) {
658 off = fdt_node_offset_by_compatible(blob, -1, compat[i]);
659 while (off != -FDT_ERR_NOTFOUND) {
Stefan Roese8a805df2010-09-16 14:01:53 +0200660 int idx;
661
Stefan Roese30d45c02009-10-21 11:59:52 +0200662 /*
Stefan Roese8a805df2010-09-16 14:01:53 +0200663 * Found one compatible node, so fixup the size
664 * int its reg properties
Stefan Roese30d45c02009-10-21 11:59:52 +0200665 */
666 prop = fdt_get_property_w(blob, off, "reg", &len);
667 if (prop) {
Stefan Roese8a805df2010-09-16 14:01:53 +0200668 int tuple_size = 3 * sizeof(reg);
Stefan Roese30d45c02009-10-21 11:59:52 +0200669
Stefan Roese8a805df2010-09-16 14:01:53 +0200670 /*
671 * There might be multiple reg-tuples,
672 * so loop through them all
673 */
Stefan Roese2778a012010-09-24 13:51:50 +0200674 reg = reg2 = (u32 *)&prop->data[0];
675 for (idx = 0; idx < (len / tuple_size); idx++) {
Stefan Roese8a805df2010-09-16 14:01:53 +0200676 /*
677 * Update size in reg property
678 */
679 reg[2] = flash_get_bank_size(reg[0],
680 idx);
Stefan Roese2778a012010-09-24 13:51:50 +0200681
682 /*
683 * Point to next reg tuple
684 */
685 reg += 3;
Stefan Roese30d45c02009-10-21 11:59:52 +0200686 }
Stefan Roese2778a012010-09-24 13:51:50 +0200687
688 fdt_setprop(blob, off, "reg", reg2, len);
Stefan Roese30d45c02009-10-21 11:59:52 +0200689 }
690
691 /* Move to next compatible node */
692 off = fdt_node_offset_by_compatible(blob, off,
693 compat[i]);
694 }
695 }
696
Stefan Roese8a805df2010-09-16 14:01:53 +0200697 return 0;
Stefan Roese30d45c02009-10-21 11:59:52 +0200698}
699#endif
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100700
Matthew McClintockcb2707a2010-10-13 13:39:26 +0200701int fdt_increase_size(void *fdt, int add_len)
702{
703 int newlen;
704
705 newlen = fdt_totalsize(fdt) + add_len;
706
707 /* Open in place with a new len */
708 return fdt_open_into(fdt, fdt, newlen);
709}
710
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100711#ifdef CONFIG_FDT_FIXUP_PARTITIONS
712#include <jffs2/load_kernel.h>
713#include <mtd_node.h>
714
715struct reg_cell {
716 unsigned int r0;
717 unsigned int r1;
718};
719
720int fdt_del_subnodes(const void *blob, int parent_offset)
721{
722 int off, ndepth;
723 int ret;
724
725 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
726 (off >= 0) && (ndepth > 0);
727 off = fdt_next_node(blob, off, &ndepth)) {
728 if (ndepth == 1) {
729 debug("delete %s: offset: %x\n",
730 fdt_get_name(blob, off, 0), off);
731 ret = fdt_del_node((void *)blob, off);
732 if (ret < 0) {
733 printf("Can't delete node: %s\n",
734 fdt_strerror(ret));
735 return ret;
736 } else {
737 ndepth = 0;
738 off = parent_offset;
739 }
740 }
741 }
742 return 0;
743}
744
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100745int fdt_del_partitions(void *blob, int parent_offset)
746{
747 const void *prop;
748 int ndepth = 0;
749 int off;
750 int ret;
751
752 off = fdt_next_node(blob, parent_offset, &ndepth);
753 if (off > 0 && ndepth == 1) {
754 prop = fdt_getprop(blob, off, "label", NULL);
755 if (prop == NULL) {
756 /*
757 * Could not find label property, nand {}; node?
758 * Check subnode, delete partitions there if any.
759 */
760 return fdt_del_partitions(blob, off);
761 } else {
762 ret = fdt_del_subnodes(blob, parent_offset);
763 if (ret < 0) {
764 printf("Can't remove subnodes: %s\n",
765 fdt_strerror(ret));
766 return ret;
767 }
768 }
769 }
770 return 0;
771}
772
773int fdt_node_set_part_info(void *blob, int parent_offset,
774 struct mtd_device *dev)
775{
776 struct list_head *pentry;
777 struct part_info *part;
778 struct reg_cell cell;
779 int off, ndepth = 0;
780 int part_num, ret;
781 char buf[64];
782
783 ret = fdt_del_partitions(blob, parent_offset);
784 if (ret < 0)
785 return ret;
786
787 /*
788 * Check if it is nand {}; subnode, adjust
789 * the offset in this case
790 */
791 off = fdt_next_node(blob, parent_offset, &ndepth);
792 if (off > 0 && ndepth == 1)
793 parent_offset = off;
794
795 part_num = 0;
796 list_for_each_prev(pentry, &dev->parts) {
797 int newoff;
798
799 part = list_entry(pentry, struct part_info, link);
800
Scott Wood06503f12013-10-15 17:41:27 -0500801 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100802 part_num, part->name, part->size,
803 part->offset, part->mask_flags);
804
Scott Wood06503f12013-10-15 17:41:27 -0500805 sprintf(buf, "partition@%llx", part->offset);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100806add_sub:
807 ret = fdt_add_subnode(blob, parent_offset, buf);
808 if (ret == -FDT_ERR_NOSPACE) {
809 ret = fdt_increase_size(blob, 512);
810 if (!ret)
811 goto add_sub;
812 else
813 goto err_size;
814 } else if (ret < 0) {
815 printf("Can't add partition node: %s\n",
816 fdt_strerror(ret));
817 return ret;
818 }
819 newoff = ret;
820
821 /* Check MTD_WRITEABLE_CMD flag */
822 if (part->mask_flags & 1) {
823add_ro:
824 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
825 if (ret == -FDT_ERR_NOSPACE) {
826 ret = fdt_increase_size(blob, 512);
827 if (!ret)
828 goto add_ro;
829 else
830 goto err_size;
831 } else if (ret < 0)
832 goto err_prop;
833 }
834
835 cell.r0 = cpu_to_fdt32(part->offset);
836 cell.r1 = cpu_to_fdt32(part->size);
837add_reg:
838 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
839 if (ret == -FDT_ERR_NOSPACE) {
840 ret = fdt_increase_size(blob, 512);
841 if (!ret)
842 goto add_reg;
843 else
844 goto err_size;
845 } else if (ret < 0)
846 goto err_prop;
847
848add_label:
849 ret = fdt_setprop_string(blob, newoff, "label", part->name);
850 if (ret == -FDT_ERR_NOSPACE) {
851 ret = fdt_increase_size(blob, 512);
852 if (!ret)
853 goto add_label;
854 else
855 goto err_size;
856 } else if (ret < 0)
857 goto err_prop;
858
859 part_num++;
860 }
861 return 0;
862err_size:
863 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
864 return ret;
865err_prop:
866 printf("Can't add property: %s\n", fdt_strerror(ret));
867 return ret;
868}
869
870/*
871 * Update partitions in nor/nand nodes using info from
872 * mtdparts environment variable. The nodes to update are
873 * specified by node_info structure which contains mtd device
874 * type and compatible string: E. g. the board code in
875 * ft_board_setup() could use:
876 *
877 * struct node_info nodes[] = {
878 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
879 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
880 * };
881 *
882 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
883 */
884void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
885{
886 struct node_info *ni = node_info;
887 struct mtd_device *dev;
888 char *parts;
889 int i, idx;
890 int noff;
891
892 parts = getenv("mtdparts");
893 if (!parts)
894 return;
895
896 if (mtdparts_init() != 0)
897 return;
898
899 for (i = 0; i < node_info_size; i++) {
900 idx = 0;
901 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
902 while (noff != -FDT_ERR_NOTFOUND) {
903 debug("%s: %s, mtd dev type %d\n",
904 fdt_get_name(blob, noff, 0),
905 ni[i].compat, ni[i].type);
906 dev = device_find(ni[i].type, idx++);
907 if (dev) {
908 if (fdt_node_set_part_info(blob, noff, dev))
909 return; /* return on error */
910 }
911
912 /* Jump to next flash node */
913 noff = fdt_node_offset_by_compatible(blob, noff,
914 ni[i].compat);
915 }
916 }
917}
918#endif
Kumar Gala49b97d92010-03-30 10:19:26 -0500919
920void fdt_del_node_and_alias(void *blob, const char *alias)
921{
922 int off = fdt_path_offset(blob, alias);
923
924 if (off < 0)
925 return;
926
927 fdt_del_node(blob, off);
928
929 off = fdt_path_offset(blob, "/aliases");
930 fdt_delprop(blob, off, alias);
931}
Kumar Galaa0342c02010-06-16 14:27:38 -0500932
Kumar Galaa0342c02010-06-16 14:27:38 -0500933#define PRu64 "%llx"
934
935/* Max address size we deal with */
936#define OF_MAX_ADDR_CELLS 4
937#define OF_BAD_ADDR ((u64)-1)
938#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
939 (ns) > 0)
940
941/* Debug utility */
942#ifdef DEBUG
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000943static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -0500944{
945 printf("%s", s);
946 while(na--)
947 printf(" %08x", *(addr++));
948 printf("\n");
949}
950#else
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000951static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
Kumar Galaa0342c02010-06-16 14:27:38 -0500952#endif
953
954/* Callbacks for bus specific translators */
955struct of_bus {
956 const char *name;
957 const char *addresses;
Scott Wood6395f312010-08-12 18:37:39 -0500958 void (*count_cells)(void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -0500959 int *addrc, int *sizec);
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000960 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -0500961 int na, int ns, int pna);
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000962 int (*translate)(fdt32_t *addr, u64 offset, int na);
Kumar Galaa0342c02010-06-16 14:27:38 -0500963};
964
965/* Default translator (generic bus) */
Arnab Basuf43b4352014-09-08 12:19:59 -0700966void of_bus_default_count_cells(void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -0500967 int *addrc, int *sizec)
968{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000969 const fdt32_t *prop;
Scott Wood6395f312010-08-12 18:37:39 -0500970
971 if (addrc) {
972 prop = fdt_getprop(blob, parentoffset, "#address-cells", NULL);
973 if (prop)
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000974 *addrc = be32_to_cpup(prop);
Scott Wood6395f312010-08-12 18:37:39 -0500975 else
976 *addrc = 2;
977 }
978
979 if (sizec) {
980 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
981 if (prop)
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000982 *sizec = be32_to_cpup(prop);
Scott Wood6395f312010-08-12 18:37:39 -0500983 else
984 *sizec = 1;
985 }
Kumar Galaa0342c02010-06-16 14:27:38 -0500986}
987
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000988static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -0500989 int na, int ns, int pna)
990{
991 u64 cp, s, da;
992
993 cp = of_read_number(range, na);
994 s = of_read_number(range + na + pna, ns);
995 da = of_read_number(addr, na);
996
997 debug("OF: default map, cp="PRu64", s="PRu64", da="PRu64"\n",
998 cp, s, da);
999
1000 if (da < cp || da >= (cp + s))
1001 return OF_BAD_ADDR;
1002 return da - cp;
1003}
1004
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001005static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -05001006{
1007 u64 a = of_read_number(addr, na);
1008 memset(addr, 0, na * 4);
1009 a += offset;
1010 if (na > 1)
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001011 addr[na - 2] = cpu_to_fdt32(a >> 32);
1012 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
Kumar Galaa0342c02010-06-16 14:27:38 -05001013
1014 return 0;
1015}
1016
1017/* Array of bus specific translators */
1018static struct of_bus of_busses[] = {
1019 /* Default */
1020 {
1021 .name = "default",
1022 .addresses = "reg",
1023 .count_cells = of_bus_default_count_cells,
1024 .map = of_bus_default_map,
1025 .translate = of_bus_default_translate,
1026 },
1027};
1028
1029static int of_translate_one(void * blob, int parent, struct of_bus *bus,
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001030 struct of_bus *pbus, fdt32_t *addr,
Kumar Galaa0342c02010-06-16 14:27:38 -05001031 int na, int ns, int pna, const char *rprop)
1032{
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001033 const fdt32_t *ranges;
Kumar Galaa0342c02010-06-16 14:27:38 -05001034 int rlen;
1035 int rone;
1036 u64 offset = OF_BAD_ADDR;
1037
1038 /* Normally, an absence of a "ranges" property means we are
1039 * crossing a non-translatable boundary, and thus the addresses
1040 * below the current not cannot be converted to CPU physical ones.
1041 * Unfortunately, while this is very clear in the spec, it's not
1042 * what Apple understood, and they do have things like /uni-n or
1043 * /ht nodes with no "ranges" property and a lot of perfectly
1044 * useable mapped devices below them. Thus we treat the absence of
1045 * "ranges" as equivalent to an empty "ranges" property which means
1046 * a 1:1 translation at that level. It's up to the caller not to try
1047 * to translate addresses that aren't supposed to be translated in
1048 * the first place. --BenH.
1049 */
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001050 ranges = fdt_getprop(blob, parent, rprop, &rlen);
Kumar Galaa0342c02010-06-16 14:27:38 -05001051 if (ranges == NULL || rlen == 0) {
1052 offset = of_read_number(addr, na);
1053 memset(addr, 0, pna * 4);
1054 debug("OF: no ranges, 1:1 translation\n");
1055 goto finish;
1056 }
1057
1058 debug("OF: walking ranges...\n");
1059
1060 /* Now walk through the ranges */
1061 rlen /= 4;
1062 rone = na + pna + ns;
1063 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1064 offset = bus->map(addr, ranges, na, ns, pna);
1065 if (offset != OF_BAD_ADDR)
1066 break;
1067 }
1068 if (offset == OF_BAD_ADDR) {
1069 debug("OF: not found !\n");
1070 return 1;
1071 }
1072 memcpy(addr, ranges + na, 4 * pna);
1073
1074 finish:
1075 of_dump_addr("OF: parent translation for:", addr, pna);
1076 debug("OF: with offset: "PRu64"\n", offset);
1077
1078 /* Translate it into parent bus space */
1079 return pbus->translate(addr, offset, pna);
1080}
1081
1082/*
1083 * Translate an address from the device-tree into a CPU physical address,
1084 * this walks up the tree and applies the various bus mappings on the
1085 * way.
1086 *
1087 * Note: We consider that crossing any level with #size-cells == 0 to mean
1088 * that translation is impossible (that is we are not dealing with a value
1089 * that can be mapped to a cpu physical address). This is not really specified
1090 * that way, but this is traditionally the way IBM at least do things
1091 */
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001092static u64 __of_translate_address(void *blob, int node_offset, const fdt32_t *in_addr,
1093 const char *rprop)
Kumar Galaa0342c02010-06-16 14:27:38 -05001094{
1095 int parent;
1096 struct of_bus *bus, *pbus;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001097 fdt32_t addr[OF_MAX_ADDR_CELLS];
Kumar Galaa0342c02010-06-16 14:27:38 -05001098 int na, ns, pna, pns;
1099 u64 result = OF_BAD_ADDR;
1100
1101 debug("OF: ** translation for device %s **\n",
1102 fdt_get_name(blob, node_offset, NULL));
1103
1104 /* Get parent & match bus type */
1105 parent = fdt_parent_offset(blob, node_offset);
1106 if (parent < 0)
1107 goto bail;
1108 bus = &of_busses[0];
1109
1110 /* Cound address cells & copy address locally */
Scott Wood6395f312010-08-12 18:37:39 -05001111 bus->count_cells(blob, parent, &na, &ns);
Kumar Galaa0342c02010-06-16 14:27:38 -05001112 if (!OF_CHECK_COUNTS(na, ns)) {
1113 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1114 fdt_get_name(blob, node_offset, NULL));
1115 goto bail;
1116 }
1117 memcpy(addr, in_addr, na * 4);
1118
1119 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1120 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1121 of_dump_addr("OF: translating address:", addr, na);
1122
1123 /* Translate */
1124 for (;;) {
1125 /* Switch to parent bus */
1126 node_offset = parent;
1127 parent = fdt_parent_offset(blob, node_offset);
1128
1129 /* If root, we have finished */
1130 if (parent < 0) {
1131 debug("OF: reached root node\n");
1132 result = of_read_number(addr, na);
1133 break;
1134 }
1135
1136 /* Get new parent bus and counts */
1137 pbus = &of_busses[0];
Scott Wood6395f312010-08-12 18:37:39 -05001138 pbus->count_cells(blob, parent, &pna, &pns);
Kumar Galaa0342c02010-06-16 14:27:38 -05001139 if (!OF_CHECK_COUNTS(pna, pns)) {
1140 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1141 fdt_get_name(blob, node_offset, NULL));
1142 break;
1143 }
1144
1145 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1146 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1147
1148 /* Apply bus translation */
1149 if (of_translate_one(blob, node_offset, bus, pbus,
1150 addr, na, ns, pna, rprop))
1151 break;
1152
1153 /* Complete the move up one level */
1154 na = pna;
1155 ns = pns;
1156 bus = pbus;
1157
1158 of_dump_addr("OF: one level translation:", addr, na);
1159 }
1160 bail:
1161
1162 return result;
1163}
1164
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001165u64 fdt_translate_address(void *blob, int node_offset, const fdt32_t *in_addr)
Kumar Galaa0342c02010-06-16 14:27:38 -05001166{
1167 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1168}
Kumar Gala75e73af2010-07-04 12:48:21 -05001169
1170/**
1171 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1172 * who's reg property matches a physical cpu address
1173 *
1174 * @blob: ptr to device tree
1175 * @compat: compatiable string to match
1176 * @compat_off: property name
1177 *
1178 */
1179int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1180 phys_addr_t compat_off)
1181{
1182 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1183 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001184 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
Kumar Gala75e73af2010-07-04 12:48:21 -05001185 if (reg) {
1186 if (compat_off == fdt_translate_address(blob, off, reg))
1187 return off;
1188 }
1189 off = fdt_node_offset_by_compatible(blob, off, compat);
1190 }
1191
1192 return -FDT_ERR_NOTFOUND;
1193}
1194
Kumar Galab4b847e2010-07-09 16:18:58 -05001195/**
1196 * fdt_alloc_phandle: Return next free phandle value
1197 *
1198 * @blob: ptr to device tree
1199 */
1200int fdt_alloc_phandle(void *blob)
1201{
Timur Tabi50bf17b2011-09-20 18:24:35 -05001202 int offset, phandle = 0;
Kumar Gala75e73af2010-07-04 12:48:21 -05001203
Kumar Galab4b847e2010-07-09 16:18:58 -05001204 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1205 offset = fdt_next_node(blob, offset, NULL)) {
Timur Tabi50bf17b2011-09-20 18:24:35 -05001206 phandle = max(phandle, fdt_get_phandle(blob, offset));
Kumar Galab4b847e2010-07-09 16:18:58 -05001207 }
1208
1209 return phandle + 1;
1210}
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001211
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001212/*
Kumar Galaf117c0f2011-08-01 00:23:23 -05001213 * fdt_set_phandle: Create a phandle property for the given node
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001214 *
1215 * @fdt: ptr to device tree
1216 * @nodeoffset: node to update
1217 * @phandle: phandle value to set (must be unique)
Kumar Galaf117c0f2011-08-01 00:23:23 -05001218 */
1219int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001220{
1221 int ret;
1222
1223#ifdef DEBUG
1224 int off = fdt_node_offset_by_phandle(fdt, phandle);
1225
1226 if ((off >= 0) && (off != nodeoffset)) {
1227 char buf[64];
1228
1229 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1230 printf("Trying to update node %s with phandle %u ",
1231 buf, phandle);
1232
1233 fdt_get_path(fdt, off, buf, sizeof(buf));
1234 printf("that already exists in node %s.\n", buf);
1235 return -FDT_ERR_BADPHANDLE;
1236 }
1237#endif
1238
1239 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1240 if (ret < 0)
1241 return ret;
1242
1243 /*
1244 * For now, also set the deprecated "linux,phandle" property, so that we
1245 * don't break older kernels.
1246 */
1247 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1248
1249 return ret;
1250}
1251
Kumar Gala10aeabd2011-08-01 00:25:20 -05001252/*
1253 * fdt_create_phandle: Create a phandle property for the given node
1254 *
1255 * @fdt: ptr to device tree
1256 * @nodeoffset: node to update
1257 */
Timur Tabi3c927cc2011-09-20 18:24:34 -05001258unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
Kumar Gala10aeabd2011-08-01 00:25:20 -05001259{
1260 /* see if there is a phandle already */
1261 int phandle = fdt_get_phandle(fdt, nodeoffset);
1262
1263 /* if we got 0, means no phandle so create one */
1264 if (phandle == 0) {
Timur Tabi3c927cc2011-09-20 18:24:34 -05001265 int ret;
1266
Kumar Gala10aeabd2011-08-01 00:25:20 -05001267 phandle = fdt_alloc_phandle(fdt);
Timur Tabi3c927cc2011-09-20 18:24:34 -05001268 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1269 if (ret < 0) {
1270 printf("Can't set phandle %u: %s\n", phandle,
1271 fdt_strerror(ret));
1272 return 0;
1273 }
Kumar Gala10aeabd2011-08-01 00:25:20 -05001274 }
1275
1276 return phandle;
1277}
1278
Shengzhou Liu2a523f52011-10-14 16:26:05 +08001279/*
1280 * fdt_set_node_status: Set status for the given node
1281 *
1282 * @fdt: ptr to device tree
1283 * @nodeoffset: node to update
1284 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1285 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1286 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1287 */
1288int fdt_set_node_status(void *fdt, int nodeoffset,
1289 enum fdt_status status, unsigned int error_code)
1290{
1291 char buf[16];
1292 int ret = 0;
1293
1294 if (nodeoffset < 0)
1295 return nodeoffset;
1296
1297 switch (status) {
1298 case FDT_STATUS_OKAY:
1299 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1300 break;
1301 case FDT_STATUS_DISABLED:
1302 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1303 break;
1304 case FDT_STATUS_FAIL:
1305 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1306 break;
1307 case FDT_STATUS_FAIL_ERROR_CODE:
1308 sprintf(buf, "fail-%d", error_code);
1309 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1310 break;
1311 default:
1312 printf("Invalid fdt status: %x\n", status);
1313 ret = -1;
1314 break;
1315 }
1316
1317 return ret;
1318}
1319
1320/*
1321 * fdt_set_status_by_alias: Set status for the given node given an alias
1322 *
1323 * @fdt: ptr to device tree
1324 * @alias: alias of node to update
1325 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1326 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1327 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1328 */
1329int fdt_set_status_by_alias(void *fdt, const char* alias,
1330 enum fdt_status status, unsigned int error_code)
1331{
1332 int offset = fdt_path_offset(fdt, alias);
1333
1334 return fdt_set_node_status(fdt, offset, status, error_code);
1335}
1336
Tom Wai-Hong Tam096eb3f2012-12-05 14:46:41 +00001337#if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001338int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1339{
1340 int noff;
1341 int ret;
1342
1343 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1344 if (noff != -FDT_ERR_NOTFOUND) {
1345 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1346add_edid:
1347 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1348 if (ret == -FDT_ERR_NOSPACE) {
1349 ret = fdt_increase_size(blob, 512);
1350 if (!ret)
1351 goto add_edid;
1352 else
1353 goto err_size;
1354 } else if (ret < 0) {
1355 printf("Can't add property: %s\n", fdt_strerror(ret));
1356 return ret;
1357 }
1358 }
1359 return 0;
1360err_size:
1361 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1362 return ret;
1363}
1364#endif
Timur Tabibb682002011-05-03 13:24:07 -05001365
1366/*
1367 * Verify the physical address of device tree node for a given alias
1368 *
1369 * This function locates the device tree node of a given alias, and then
1370 * verifies that the physical address of that device matches the given
1371 * parameter. It displays a message if there is a mismatch.
1372 *
1373 * Returns 1 on success, 0 on failure
1374 */
1375int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1376{
1377 const char *path;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001378 const fdt32_t *reg;
Timur Tabibb682002011-05-03 13:24:07 -05001379 int node, len;
1380 u64 dt_addr;
1381
1382 path = fdt_getprop(fdt, anode, alias, NULL);
1383 if (!path) {
1384 /* If there's no such alias, then it's not a failure */
1385 return 1;
1386 }
1387
1388 node = fdt_path_offset(fdt, path);
1389 if (node < 0) {
1390 printf("Warning: device tree alias '%s' points to invalid "
1391 "node %s.\n", alias, path);
1392 return 0;
1393 }
1394
1395 reg = fdt_getprop(fdt, node, "reg", &len);
1396 if (!reg) {
1397 printf("Warning: device tree node '%s' has no address.\n",
1398 path);
1399 return 0;
1400 }
1401
1402 dt_addr = fdt_translate_address(fdt, node, reg);
1403 if (addr != dt_addr) {
1404 printf("Warning: U-Boot configured device %s at address %llx,\n"
1405 " but the device tree has it address %llx.\n",
1406 alias, addr, dt_addr);
1407 return 0;
1408 }
1409
1410 return 1;
1411}
1412
1413/*
1414 * Returns the base address of an SOC or PCI node
1415 */
1416u64 fdt_get_base_address(void *fdt, int node)
1417{
1418 int size;
1419 u32 naddr;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001420 const fdt32_t *prop;
Timur Tabibb682002011-05-03 13:24:07 -05001421
1422 prop = fdt_getprop(fdt, node, "#address-cells", &size);
1423 if (prop && size == 4)
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001424 naddr = be32_to_cpup(prop);
Timur Tabibb682002011-05-03 13:24:07 -05001425 else
1426 naddr = 2;
1427
1428 prop = fdt_getprop(fdt, node, "ranges", &size);
1429
1430 return prop ? fdt_translate_address(fdt, node, prop + naddr) : 0;
1431}
Alexander Grafc48e6862014-04-11 17:09:41 +02001432
1433/*
1434 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1435 */
1436static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1437 uint64_t *val, int cells)
1438{
1439 const fdt32_t *prop32 = &prop[cell_off];
1440 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];
1441
1442 if ((cell_off + cells) > prop_len)
1443 return -FDT_ERR_NOSPACE;
1444
1445 switch (cells) {
1446 case 1:
1447 *val = fdt32_to_cpu(*prop32);
1448 break;
1449 case 2:
1450 *val = fdt64_to_cpu(*prop64);
1451 break;
1452 default:
1453 return -FDT_ERR_NOSPACE;
1454 }
1455
1456 return 0;
1457}
1458
1459/**
1460 * fdt_read_range - Read a node's n'th range property
1461 *
1462 * @fdt: ptr to device tree
1463 * @node: offset of node
1464 * @n: range index
1465 * @child_addr: pointer to storage for the "child address" field
1466 * @addr: pointer to storage for the CPU view translated physical start
1467 * @len: pointer to storage for the range length
1468 *
1469 * Convenience function that reads and interprets a specific range out of
1470 * a number of the "ranges" property array.
1471 */
1472int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1473 uint64_t *addr, uint64_t *len)
1474{
1475 int pnode = fdt_parent_offset(fdt, node);
1476 const fdt32_t *ranges;
1477 int pacells;
1478 int acells;
1479 int scells;
1480 int ranges_len;
1481 int cell = 0;
1482 int r = 0;
1483
1484 /*
1485 * The "ranges" property is an array of
1486 * { <child address> <parent address> <size in child address space> }
1487 *
1488 * All 3 elements can span a diffent number of cells. Fetch their size.
1489 */
1490 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1491 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1492 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1493
1494 /* Now try to get the ranges property */
1495 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1496 if (!ranges)
1497 return -FDT_ERR_NOTFOUND;
1498 ranges_len /= sizeof(uint32_t);
1499
1500 /* Jump to the n'th entry */
1501 cell = n * (pacells + acells + scells);
1502
1503 /* Read <child address> */
1504 if (child_addr) {
1505 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1506 acells);
1507 if (r)
1508 return r;
1509 }
1510 cell += acells;
1511
1512 /* Read <parent address> */
1513 if (addr)
1514 *addr = fdt_translate_address(fdt, node, ranges + cell);
1515 cell += pacells;
1516
1517 /* Read <size in child address space> */
1518 if (len) {
1519 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
1520 if (r)
1521 return r;
1522 }
1523
1524 return 0;
1525}