blob: 66a313e2ae978a7a199a21605a23990f9258099a [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>
Simon Glasse48f3742014-11-11 12:47:07 -070011#include <inttypes.h>
Anton Vorontsov3e303f72009-10-15 17:47:04 +040012#include <stdio_dev.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040013#include <linux/ctype.h>
14#include <linux/types.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040015#include <asm/global_data.h>
Masahiro Yamadab08c8c42018-03-05 01:20:11 +090016#include <linux/libfdt.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040017#include <fdt_support.h>
Kumar Gala151c8b02007-11-26 17:06:15 -060018#include <exports.h>
Bin Menga0ae3802015-12-07 01:39:47 -080019#include <fdtdec.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040020
Kumar Gala3bed2aa2008-10-23 00:05:47 -050021/**
Alexander Graf94fb1822014-04-11 17:09:40 +020022 * fdt_getprop_u32_default_node - Return a node's property or a default
23 *
24 * @fdt: ptr to device tree
25 * @off: offset of node
26 * @cell: cell offset in property
27 * @prop: property name
28 * @dflt: default value if the property isn't found
29 *
30 * Convenience function to return a node's property or a default value if
31 * the property doesn't exist.
32 */
33u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
34 const char *prop, const u32 dflt)
35{
36 const fdt32_t *val;
37 int len;
38
39 val = fdt_getprop(fdt, off, prop, &len);
40
41 /* Check if property exists */
42 if (!val)
43 return dflt;
44
45 /* Check if property is long enough */
46 if (len < ((cell + 1) * sizeof(uint32_t)))
47 return dflt;
48
49 return fdt32_to_cpu(*val);
50}
51
52/**
Kumar Gala3bed2aa2008-10-23 00:05:47 -050053 * fdt_getprop_u32_default - Find a node and return it's property or a default
54 *
55 * @fdt: ptr to device tree
56 * @path: path of node
57 * @prop: property name
58 * @dflt: default value if the property isn't found
59 *
60 * Convenience function to find a node and return it's property or a
61 * default value if it doesn't exist.
62 */
Gabe Black07e12782011-11-08 01:09:44 -080063u32 fdt_getprop_u32_default(const void *fdt, const char *path,
64 const char *prop, const u32 dflt)
Kumar Gala3bed2aa2008-10-23 00:05:47 -050065{
Kumar Gala3bed2aa2008-10-23 00:05:47 -050066 int off;
67
68 off = fdt_path_offset(fdt, path);
69 if (off < 0)
70 return dflt;
71
Alexander Graf94fb1822014-04-11 17:09:40 +020072 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt);
Kumar Gala3bed2aa2008-10-23 00:05:47 -050073}
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040074
Kumar Galaa3c29332007-10-24 10:21:57 -050075/**
76 * fdt_find_and_setprop: Find a node and set it's property
77 *
78 * @fdt: ptr to device tree
79 * @node: path of node
80 * @prop: property name
81 * @val: ptr to new value
82 * @len: length of new property value
83 * @create: flag to create the property if it doesn't exist
84 *
85 * Convenience function to directly set a property given the path to the node.
86 */
87int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
88 const void *val, int len, int create)
89{
Kumar Gala8d04f022007-10-24 11:04:22 -050090 int nodeoff = fdt_path_offset(fdt, node);
Kumar Galaa3c29332007-10-24 10:21:57 -050091
92 if (nodeoff < 0)
93 return nodeoff;
94
Kim Phillips8aa5ec62013-01-16 14:00:11 +000095 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
Kumar Galaa3c29332007-10-24 10:21:57 -050096 return 0; /* create flag not set; so exit quietly */
97
98 return fdt_setprop(fdt, nodeoff, prop, val, len);
99}
100
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900101/**
Simon Glassa9e8e292014-10-23 18:58:49 -0600102 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
103 *
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900104 * @fdt: pointer to the device tree blob
105 * @parentoffset: structure block offset of a node
106 * @name: name of the subnode to locate
107 *
108 * fdt_subnode_offset() finds a subnode of the node with a given name.
109 * If the subnode does not exist, it will be created.
110 */
Simon Glassa9e8e292014-10-23 18:58:49 -0600111int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name)
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900112{
113 int offset;
114
115 offset = fdt_subnode_offset(fdt, parentoffset, name);
116
117 if (offset == -FDT_ERR_NOTFOUND)
118 offset = fdt_add_subnode(fdt, parentoffset, name);
119
120 if (offset < 0)
121 printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset));
122
123 return offset;
124}
125
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900126/* rename to CONFIG_OF_STDOUT_PATH ? */
127#if defined(OF_STDOUT_PATH)
128static int fdt_fixup_stdout(void *fdt, int chosenoff)
129{
130 return fdt_setprop(fdt, chosenoff, "linux,stdout-path",
131 OF_STDOUT_PATH, strlen(OF_STDOUT_PATH) + 1);
132}
133#elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
Detlev Zundel40777812008-06-20 22:24:05 +0200134static int fdt_fixup_stdout(void *fdt, int chosenoff)
Kumar Gala151c8b02007-11-26 17:06:15 -0600135{
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900136 int err;
137 int aliasoff;
Kumar Gala151c8b02007-11-26 17:06:15 -0600138 char sername[9] = { 0 };
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900139 const void *path;
140 int len;
141 char tmp[256]; /* long enough */
Kumar Gala151c8b02007-11-26 17:06:15 -0600142
Bin Meng9f29aeb2016-01-13 19:38:58 -0800143 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
Kumar Gala151c8b02007-11-26 17:06:15 -0600144
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900145 aliasoff = fdt_path_offset(fdt, "/aliases");
146 if (aliasoff < 0) {
147 err = aliasoff;
Scott Woodda77c812015-09-01 22:48:08 -0500148 goto noalias;
Kumar Gala151c8b02007-11-26 17:06:15 -0600149 }
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900150
151 path = fdt_getprop(fdt, aliasoff, sername, &len);
152 if (!path) {
153 err = len;
Scott Woodda77c812015-09-01 22:48:08 -0500154 goto noalias;
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900155 }
156
157 /* fdt_setprop may break "path" so we copy it to tmp buffer */
158 memcpy(tmp, path, len);
159
160 err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len);
Kumar Gala151c8b02007-11-26 17:06:15 -0600161 if (err < 0)
162 printf("WARNING: could not set linux,stdout-path %s.\n",
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900163 fdt_strerror(err));
Kumar Gala151c8b02007-11-26 17:06:15 -0600164
165 return err;
Scott Woodda77c812015-09-01 22:48:08 -0500166
167noalias:
168 printf("WARNING: %s: could not read %s alias: %s\n",
169 __func__, sername, fdt_strerror(err));
170
171 return 0;
Kumar Gala151c8b02007-11-26 17:06:15 -0600172}
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900173#else
174static int fdt_fixup_stdout(void *fdt, int chosenoff)
175{
176 return 0;
177}
Kumar Gala151c8b02007-11-26 17:06:15 -0600178#endif
179
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900180static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name,
181 uint64_t val, int is_u64)
182{
183 if (is_u64)
184 return fdt_setprop_u64(fdt, nodeoffset, name, val);
185 else
186 return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val);
187}
188
Paul Kocialkowski10be5b52015-05-21 11:27:03 +0200189int fdt_root(void *fdt)
190{
191 char *serial;
192 int err;
193
194 err = fdt_check_header(fdt);
195 if (err < 0) {
196 printf("fdt_root: %s\n", fdt_strerror(err));
197 return err;
198 }
199
Simon Glass00caae62017-08-03 12:22:12 -0600200 serial = env_get("serial#");
Paul Kocialkowski10be5b52015-05-21 11:27:03 +0200201 if (serial) {
202 err = fdt_setprop(fdt, 0, "serial-number", serial,
203 strlen(serial) + 1);
204
205 if (err < 0) {
206 printf("WARNING: could not set serial-number %s.\n",
207 fdt_strerror(err));
208 return err;
209 }
210 }
211
212 return 0;
213}
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900214
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900215int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end)
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500216{
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900217 int nodeoffset;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500218 int err, j, total;
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900219 int is_u64;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500220 uint64_t addr, size;
221
Masahiro Yamada50babaf2014-04-18 17:41:05 +0900222 /* just return if the size of initrd is zero */
223 if (initrd_start == initrd_end)
224 return 0;
225
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900226 /* find or create "/chosen" node. */
227 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
228 if (nodeoffset < 0)
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500229 return nodeoffset;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500230
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500231 total = fdt_num_mem_rsv(fdt);
232
233 /*
234 * Look for an existing entry and update it. If we don't find
235 * the entry, we will j be the next available slot.
236 */
237 for (j = 0; j < total; j++) {
238 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
239 if (addr == initrd_start) {
240 fdt_del_mem_rsv(fdt, j);
241 break;
242 }
243 }
244
Grant Likelyce6b27a2011-03-28 09:58:55 +0000245 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500246 if (err < 0) {
247 printf("fdt_initrd: %s\n", fdt_strerror(err));
248 return err;
249 }
250
Simon Glass933cdbb2014-10-23 18:58:57 -0600251 is_u64 = (fdt_address_cells(fdt, 0) == 2);
David Fengf77a6062013-12-14 11:47:29 +0800252
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900253 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start",
254 (uint64_t)initrd_start, is_u64);
255
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900256 if (err < 0) {
257 printf("WARNING: could not set linux,initrd-start %s.\n",
258 fdt_strerror(err));
259 return err;
260 }
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900261
262 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end",
263 (uint64_t)initrd_end, is_u64);
264
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900265 if (err < 0) {
266 printf("WARNING: could not set linux,initrd-end %s.\n",
267 fdt_strerror(err));
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500268
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900269 return err;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500270 }
271
272 return 0;
273}
274
Masahiro Yamadabc6ed0f2014-04-18 17:41:00 +0900275int fdt_chosen(void *fdt)
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400276{
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400277 int nodeoffset;
278 int err;
Gerald Van Baren35ec3982007-05-25 22:08:57 -0400279 char *str; /* used to set string properties */
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400280
281 err = fdt_check_header(fdt);
282 if (err < 0) {
Gerald Van Baren5fe6be62007-08-07 21:14:22 -0400283 printf("fdt_chosen: %s\n", fdt_strerror(err));
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400284 return err;
285 }
286
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900287 /* find or create "/chosen" node. */
288 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
289 if (nodeoffset < 0)
290 return nodeoffset;
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400291
Simon Glass00caae62017-08-03 12:22:12 -0600292 str = env_get("bootargs");
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900293 if (str) {
294 err = fdt_setprop(fdt, nodeoffset, "bootargs", str,
295 strlen(str) + 1);
296 if (err < 0) {
Masahiro Yamadabc6ed0f2014-04-18 17:41:00 +0900297 printf("WARNING: could not set bootargs %s.\n",
298 fdt_strerror(err));
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900299 return err;
300 }
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400301 }
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500302
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900303 return fdt_fixup_stdout(fdt, nodeoffset);
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400304}
305
Kumar Galae93becf2007-11-03 19:46:28 -0500306void do_fixup_by_path(void *fdt, const char *path, const char *prop,
307 const void *val, int len, int create)
308{
309#if defined(DEBUG)
310 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600311 debug("Updating property '%s/%s' = ", path, prop);
Kumar Galae93becf2007-11-03 19:46:28 -0500312 for (i = 0; i < len; i++)
313 debug(" %.2x", *(u8*)(val+i));
314 debug("\n");
315#endif
316 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
317 if (rc)
318 printf("Unable to update property %s:%s, err=%s\n",
319 path, prop, fdt_strerror(rc));
320}
321
322void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
323 u32 val, int create)
324{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000325 fdt32_t tmp = cpu_to_fdt32(val);
326 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
Kumar Galae93becf2007-11-03 19:46:28 -0500327}
328
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600329void do_fixup_by_prop(void *fdt,
330 const char *pname, const void *pval, int plen,
331 const char *prop, const void *val, int len,
332 int create)
333{
334 int off;
335#if defined(DEBUG)
336 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600337 debug("Updating property '%s' = ", prop);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600338 for (i = 0; i < len; i++)
339 debug(" %.2x", *(u8*)(val+i));
340 debug("\n");
341#endif
342 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
343 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000344 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600345 fdt_setprop(fdt, off, prop, val, len);
346 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
347 }
348}
349
350void do_fixup_by_prop_u32(void *fdt,
351 const char *pname, const void *pval, int plen,
352 const char *prop, u32 val, int create)
353{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000354 fdt32_t tmp = cpu_to_fdt32(val);
355 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600356}
357
358void do_fixup_by_compat(void *fdt, const char *compat,
359 const char *prop, const void *val, int len, int create)
360{
361 int off = -1;
362#if defined(DEBUG)
363 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600364 debug("Updating property '%s' = ", prop);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600365 for (i = 0; i < len; i++)
366 debug(" %.2x", *(u8*)(val+i));
367 debug("\n");
368#endif
369 off = fdt_node_offset_by_compatible(fdt, -1, compat);
370 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000371 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600372 fdt_setprop(fdt, off, prop, val, len);
373 off = fdt_node_offset_by_compatible(fdt, off, compat);
374 }
375}
376
377void do_fixup_by_compat_u32(void *fdt, const char *compat,
378 const char *prop, u32 val, int create)
379{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000380 fdt32_t tmp = cpu_to_fdt32(val);
381 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600382}
383
Masahiro Yamada63c09412016-11-26 11:02:10 +0900384#ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900385/*
386 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
387 */
Simon Glass41f09bb2014-10-23 18:58:55 -0600388static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size,
389 int n)
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900390{
391 int i;
Hans de Goedeffccb842014-11-28 14:23:51 +0100392 int address_cells = fdt_address_cells(fdt, 0);
393 int size_cells = fdt_size_cells(fdt, 0);
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900394 char *p = buf;
395
396 for (i = 0; i < n; i++) {
Hans de Goedeffccb842014-11-28 14:23:51 +0100397 if (address_cells == 2)
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900398 *(fdt64_t *)p = cpu_to_fdt64(address[i]);
399 else
400 *(fdt32_t *)p = cpu_to_fdt32(address[i]);
Hans de Goedeffccb842014-11-28 14:23:51 +0100401 p += 4 * address_cells;
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900402
Hans de Goedeffccb842014-11-28 14:23:51 +0100403 if (size_cells == 2)
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900404 *(fdt64_t *)p = cpu_to_fdt64(size[i]);
405 else
406 *(fdt32_t *)p = cpu_to_fdt32(size[i]);
Hans de Goedeffccb842014-11-28 14:23:51 +0100407 p += 4 * size_cells;
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900408 }
409
410 return p - (char *)buf;
411}
412
Doug Anderson5e574542013-04-30 10:22:00 +0000413#ifdef CONFIG_NR_DRAM_BANKS
414#define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
415#else
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000416#define MEMORY_BANKS_MAX 4
Doug Anderson5e574542013-04-30 10:22:00 +0000417#endif
John Rigbya6bd9e82010-10-13 13:57:33 -0600418int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
419{
420 int err, nodeoffset;
Thierry Reding6d29cc72018-01-30 11:34:17 +0100421 int len, i;
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000422 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
Kumar Gala3c927282007-11-26 14:57:45 -0600423
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000424 if (banks > MEMORY_BANKS_MAX) {
425 printf("%s: num banks %d exceeds hardcoded limit %d."
426 " Recompile with higher MEMORY_BANKS_MAX?\n",
427 __FUNCTION__, banks, MEMORY_BANKS_MAX);
428 return -1;
429 }
430
Kumar Gala3c927282007-11-26 14:57:45 -0600431 err = fdt_check_header(blob);
432 if (err < 0) {
433 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
434 return err;
435 }
436
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900437 /* find or create "/memory" node. */
438 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
439 if (nodeoffset < 0)
Miao Yan35940de2013-11-28 17:51:39 +0800440 return nodeoffset;
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900441
Kumar Gala3c927282007-11-26 14:57:45 -0600442 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
443 sizeof("memory"));
444 if (err < 0) {
445 printf("WARNING: could not set %s %s.\n", "device_type",
446 fdt_strerror(err));
447 return err;
448 }
449
Thierry Redinged5af032018-02-15 19:05:59 +0100450 for (i = 0; i < banks; i++) {
451 if (start[i] == 0 && size[i] == 0)
452 break;
453 }
454
455 banks = i;
456
Andre Przywara5c1cf892015-06-21 00:29:54 +0100457 if (!banks)
458 return 0;
459
Thierry Reding6d29cc72018-01-30 11:34:17 +0100460 for (i = 0; i < banks; i++)
461 if (start[i] == 0 && size[i] == 0)
462 break;
463
464 banks = i;
465
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900466 len = fdt_pack_reg(blob, tmp, start, size, banks);
Kumar Gala3c927282007-11-26 14:57:45 -0600467
468 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
469 if (err < 0) {
470 printf("WARNING: could not set %s %s.\n",
471 "reg", fdt_strerror(err));
472 return err;
473 }
474 return 0;
475}
Masahiro Yamada63c09412016-11-26 11:02:10 +0900476#endif
Kumar Gala3c927282007-11-26 14:57:45 -0600477
John Rigbya6bd9e82010-10-13 13:57:33 -0600478int fdt_fixup_memory(void *blob, u64 start, u64 size)
479{
480 return fdt_fixup_memory_banks(blob, &start, &size, 1);
481}
482
Kumar Galaba37aa02008-08-19 15:41:18 -0500483void fdt_fixup_ethernet(void *fdt)
Kumar Galaab544632007-11-21 11:11:03 -0600484{
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530485 int i = 0, j, prop;
Bin Mengbc393a72015-11-03 04:24:41 -0800486 char *tmp, *end;
Stephen Warren064d55f2013-05-27 18:01:19 +0000487 char mac[16];
Kumar Galaab544632007-11-21 11:11:03 -0600488 const char *path;
oliver@schinagl.nla40db6d2016-11-25 16:30:19 +0100489 unsigned char mac_addr[ARP_HLEN];
Bin Mengbc393a72015-11-03 04:24:41 -0800490 int offset;
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530491#ifdef FDT_SEQ_MACADDR_FROM_ENV
492 int nodeoff;
493 const struct fdt_property *fdt_prop;
494#endif
Kumar Galaab544632007-11-21 11:11:03 -0600495
Lev Iserovicha434fd12016-01-07 18:04:16 -0500496 if (fdt_path_offset(fdt, "/aliases") < 0)
Kumar Galaba37aa02008-08-19 15:41:18 -0500497 return;
498
Lev Iserovicha434fd12016-01-07 18:04:16 -0500499 /* Cycle through all aliases */
500 for (prop = 0; ; prop++) {
Bin Mengbc393a72015-11-03 04:24:41 -0800501 const char *name;
Bin Mengbc393a72015-11-03 04:24:41 -0800502
Lev Iserovicha434fd12016-01-07 18:04:16 -0500503 /* FDT might have been edited, recompute the offset */
504 offset = fdt_first_property_offset(fdt,
505 fdt_path_offset(fdt, "/aliases"));
506 /* Select property number 'prop' */
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530507 for (j = 0; j < prop; j++)
Lev Iserovicha434fd12016-01-07 18:04:16 -0500508 offset = fdt_next_property_offset(fdt, offset);
509
510 if (offset < 0)
511 break;
512
Bin Mengbc393a72015-11-03 04:24:41 -0800513 path = fdt_getprop_by_offset(fdt, offset, &name, NULL);
Tuomas Tynkkynenf8e57c62017-03-20 10:04:55 +0200514 if (!strncmp(name, "ethernet", 8)) {
515 /* Treat plain "ethernet" same as "ethernet0". */
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530516 if (!strcmp(name, "ethernet")
517#ifdef FDT_SEQ_MACADDR_FROM_ENV
518 || !strcmp(name, "ethernet0")
519#endif
520 )
Tuomas Tynkkynenf8e57c62017-03-20 10:04:55 +0200521 i = 0;
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530522#ifndef FDT_SEQ_MACADDR_FROM_ENV
Tuomas Tynkkynenf8e57c62017-03-20 10:04:55 +0200523 else
524 i = trailing_strtol(name);
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530525#endif
Bin Mengbc393a72015-11-03 04:24:41 -0800526 if (i != -1) {
527 if (i == 0)
528 strcpy(mac, "ethaddr");
529 else
530 sprintf(mac, "eth%daddr", i);
531 } else {
532 continue;
533 }
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530534#ifdef FDT_SEQ_MACADDR_FROM_ENV
535 nodeoff = fdt_path_offset(fdt, path);
536 fdt_prop = fdt_get_property(fdt, nodeoff, "status",
537 NULL);
538 if (fdt_prop && !strcmp(fdt_prop->data, "disabled"))
539 continue;
540 i++;
541#endif
Simon Glass00caae62017-08-03 12:22:12 -0600542 tmp = env_get(mac);
Bin Mengbc393a72015-11-03 04:24:41 -0800543 if (!tmp)
544 continue;
545
546 for (j = 0; j < 6; j++) {
547 mac_addr[j] = tmp ?
548 simple_strtoul(tmp, &end, 16) : 0;
549 if (tmp)
550 tmp = (*end) ? end + 1 : end;
551 }
552
553 do_fixup_by_path(fdt, path, "mac-address",
554 &mac_addr, 6, 0);
555 do_fixup_by_path(fdt, path, "local-mac-address",
556 &mac_addr, 6, 1);
Dan Murphyb1f49ab2013-10-02 14:00:15 -0500557 }
Kumar Galaab544632007-11-21 11:11:03 -0600558 }
559}
Anton Vorontsov18e69a32008-03-14 23:20:18 +0300560
Philipp Tomsicha5af51a2018-02-02 12:01:44 +0100561int fdt_record_loadable(void *blob, u32 index, const char *name,
562 uintptr_t load_addr, u32 size, uintptr_t entry_point,
563 const char *type, const char *os)
564{
565 int err, node;
566
567 err = fdt_check_header(blob);
568 if (err < 0) {
569 printf("%s: %s\n", __func__, fdt_strerror(err));
570 return err;
571 }
572
573 /* find or create "/fit-images" node */
574 node = fdt_find_or_add_subnode(blob, 0, "fit-images");
575 if (node < 0)
576 return node;
577
578 /* find or create "/fit-images/<name>" node */
579 node = fdt_find_or_add_subnode(blob, node, name);
580 if (node < 0)
581 return node;
582
583 /*
584 * We record these as 32bit entities, possibly truncating addresses.
585 * However, spl_fit.c is not 64bit safe either: i.e. we should not
586 * have an issue here.
587 */
588 fdt_setprop_u32(blob, node, "load-addr", load_addr);
589 if (entry_point != -1)
590 fdt_setprop_u32(blob, node, "entry-point", entry_point);
591 fdt_setprop_u32(blob, node, "size", size);
592 if (type)
593 fdt_setprop_string(blob, node, "type", type);
594 if (os)
595 fdt_setprop_string(blob, node, "os", os);
596
597 return node;
598}
599
Kumar Gala3082d232008-08-15 08:24:42 -0500600/* Resize the fdt to its actual size + a bit of padding */
Hannes Schmelzeref476832016-09-20 18:10:43 +0200601int fdt_shrink_to_minimum(void *blob, uint extrasize)
Kumar Gala3082d232008-08-15 08:24:42 -0500602{
603 int i;
604 uint64_t addr, size;
605 int total, ret;
606 uint actualsize;
607
608 if (!blob)
609 return 0;
610
611 total = fdt_num_mem_rsv(blob);
612 for (i = 0; i < total; i++) {
613 fdt_get_mem_rsv(blob, i, &addr, &size);
Simon Glass92549352011-09-17 06:48:58 +0000614 if (addr == (uintptr_t)blob) {
Kumar Gala3082d232008-08-15 08:24:42 -0500615 fdt_del_mem_rsv(blob, i);
616 break;
617 }
618 }
619
Peter Korsgaardf242a082008-10-28 08:26:52 +0100620 /*
621 * Calculate the actual size of the fdt
Feng Wang3840ebf2010-08-03 16:22:43 +0200622 * plus the size needed for 5 fdt_add_mem_rsv, one
623 * for the fdt itself and 4 for a possible initrd
624 * ((initrd-start + initrd-end) * 2 (name & value))
Peter Korsgaardf242a082008-10-28 08:26:52 +0100625 */
Kumar Gala3082d232008-08-15 08:24:42 -0500626 actualsize = fdt_off_dt_strings(blob) +
Feng Wang3840ebf2010-08-03 16:22:43 +0200627 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
Kumar Gala3082d232008-08-15 08:24:42 -0500628
Hannes Schmelzeref476832016-09-20 18:10:43 +0200629 actualsize += extrasize;
Kumar Gala3082d232008-08-15 08:24:42 -0500630 /* Make it so the fdt ends on a page boundary */
Simon Glass92549352011-09-17 06:48:58 +0000631 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
632 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
Kumar Gala3082d232008-08-15 08:24:42 -0500633
634 /* Change the fdt header to reflect the correct size */
635 fdt_set_totalsize(blob, actualsize);
636
637 /* Add the new reservation */
Simon Glass92549352011-09-17 06:48:58 +0000638 ret = fdt_add_mem_rsv(blob, (uintptr_t)blob, actualsize);
Kumar Gala3082d232008-08-15 08:24:42 -0500639 if (ret < 0)
640 return ret;
641
642 return actualsize;
643}
Kumar Gala8ab451c2008-10-22 23:33:56 -0500644
645#ifdef CONFIG_PCI
Kumar Galacfd700b2009-08-05 09:03:54 -0500646#define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
Kumar Gala8ab451c2008-10-22 23:33:56 -0500647
648#define FDT_PCI_PREFETCH (0x40000000)
649#define FDT_PCI_MEM32 (0x02000000)
650#define FDT_PCI_IO (0x01000000)
651#define FDT_PCI_MEM64 (0x03000000)
652
653int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
654
655 int addrcell, sizecell, len, r;
656 u32 *dma_range;
657 /* sized based on pci addr cells, size-cells, & address-cells */
658 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
659
660 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
661 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
662
663 dma_range = &dma_ranges[0];
664 for (r = 0; r < hose->region_count; r++) {
665 u64 bus_start, phys_start, size;
666
Kumar Galaff4e66e2009-02-06 09:49:31 -0600667 /* skip if !PCI_REGION_SYS_MEMORY */
668 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
Kumar Gala8ab451c2008-10-22 23:33:56 -0500669 continue;
670
671 bus_start = (u64)hose->regions[r].bus_start;
672 phys_start = (u64)hose->regions[r].phys_start;
673 size = (u64)hose->regions[r].size;
674
675 dma_range[0] = 0;
Kumar Galacfd700b2009-08-05 09:03:54 -0500676 if (size >= 0x100000000ull)
Kumar Gala8ab451c2008-10-22 23:33:56 -0500677 dma_range[0] |= FDT_PCI_MEM64;
678 else
679 dma_range[0] |= FDT_PCI_MEM32;
680 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
681 dma_range[0] |= FDT_PCI_PREFETCH;
682#ifdef CONFIG_SYS_PCI_64BIT
683 dma_range[1] = bus_start >> 32;
684#else
685 dma_range[1] = 0;
686#endif
687 dma_range[2] = bus_start & 0xffffffff;
688
689 if (addrcell == 2) {
690 dma_range[3] = phys_start >> 32;
691 dma_range[4] = phys_start & 0xffffffff;
692 } else {
693 dma_range[3] = phys_start & 0xffffffff;
694 }
695
696 if (sizecell == 2) {
697 dma_range[3 + addrcell + 0] = size >> 32;
698 dma_range[3 + addrcell + 1] = size & 0xffffffff;
699 } else {
700 dma_range[3 + addrcell + 0] = size & 0xffffffff;
701 }
702
703 dma_range += (3 + addrcell + sizecell);
704 }
705
706 len = dma_range - &dma_ranges[0];
707 if (len)
708 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
709
710 return 0;
711}
712#endif
Stefan Roese30d45c02009-10-21 11:59:52 +0200713
Matthew McClintockcb2707a2010-10-13 13:39:26 +0200714int fdt_increase_size(void *fdt, int add_len)
715{
716 int newlen;
717
718 newlen = fdt_totalsize(fdt) + add_len;
719
720 /* Open in place with a new len */
721 return fdt_open_into(fdt, fdt, newlen);
722}
723
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100724#ifdef CONFIG_FDT_FIXUP_PARTITIONS
725#include <jffs2/load_kernel.h>
726#include <mtd_node.h>
727
728struct reg_cell {
729 unsigned int r0;
730 unsigned int r1;
731};
732
733int fdt_del_subnodes(const void *blob, int parent_offset)
734{
735 int off, ndepth;
736 int ret;
737
738 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
739 (off >= 0) && (ndepth > 0);
740 off = fdt_next_node(blob, off, &ndepth)) {
741 if (ndepth == 1) {
742 debug("delete %s: offset: %x\n",
743 fdt_get_name(blob, off, 0), off);
744 ret = fdt_del_node((void *)blob, off);
745 if (ret < 0) {
746 printf("Can't delete node: %s\n",
747 fdt_strerror(ret));
748 return ret;
749 } else {
750 ndepth = 0;
751 off = parent_offset;
752 }
753 }
754 }
755 return 0;
756}
757
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100758int fdt_del_partitions(void *blob, int parent_offset)
759{
760 const void *prop;
761 int ndepth = 0;
762 int off;
763 int ret;
764
765 off = fdt_next_node(blob, parent_offset, &ndepth);
766 if (off > 0 && ndepth == 1) {
767 prop = fdt_getprop(blob, off, "label", NULL);
768 if (prop == NULL) {
769 /*
770 * Could not find label property, nand {}; node?
771 * Check subnode, delete partitions there if any.
772 */
773 return fdt_del_partitions(blob, off);
774 } else {
775 ret = fdt_del_subnodes(blob, parent_offset);
776 if (ret < 0) {
777 printf("Can't remove subnodes: %s\n",
778 fdt_strerror(ret));
779 return ret;
780 }
781 }
782 }
783 return 0;
784}
785
786int fdt_node_set_part_info(void *blob, int parent_offset,
787 struct mtd_device *dev)
788{
789 struct list_head *pentry;
790 struct part_info *part;
791 struct reg_cell cell;
792 int off, ndepth = 0;
793 int part_num, ret;
794 char buf[64];
795
796 ret = fdt_del_partitions(blob, parent_offset);
797 if (ret < 0)
798 return ret;
799
800 /*
801 * Check if it is nand {}; subnode, adjust
802 * the offset in this case
803 */
804 off = fdt_next_node(blob, parent_offset, &ndepth);
805 if (off > 0 && ndepth == 1)
806 parent_offset = off;
807
808 part_num = 0;
809 list_for_each_prev(pentry, &dev->parts) {
810 int newoff;
811
812 part = list_entry(pentry, struct part_info, link);
813
Scott Wood06503f12013-10-15 17:41:27 -0500814 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100815 part_num, part->name, part->size,
816 part->offset, part->mask_flags);
817
Scott Wood06503f12013-10-15 17:41:27 -0500818 sprintf(buf, "partition@%llx", part->offset);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100819add_sub:
820 ret = fdt_add_subnode(blob, parent_offset, buf);
821 if (ret == -FDT_ERR_NOSPACE) {
822 ret = fdt_increase_size(blob, 512);
823 if (!ret)
824 goto add_sub;
825 else
826 goto err_size;
827 } else if (ret < 0) {
828 printf("Can't add partition node: %s\n",
829 fdt_strerror(ret));
830 return ret;
831 }
832 newoff = ret;
833
834 /* Check MTD_WRITEABLE_CMD flag */
835 if (part->mask_flags & 1) {
836add_ro:
837 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
838 if (ret == -FDT_ERR_NOSPACE) {
839 ret = fdt_increase_size(blob, 512);
840 if (!ret)
841 goto add_ro;
842 else
843 goto err_size;
844 } else if (ret < 0)
845 goto err_prop;
846 }
847
848 cell.r0 = cpu_to_fdt32(part->offset);
849 cell.r1 = cpu_to_fdt32(part->size);
850add_reg:
851 ret = fdt_setprop(blob, newoff, "reg", &cell, sizeof(cell));
852 if (ret == -FDT_ERR_NOSPACE) {
853 ret = fdt_increase_size(blob, 512);
854 if (!ret)
855 goto add_reg;
856 else
857 goto err_size;
858 } else if (ret < 0)
859 goto err_prop;
860
861add_label:
862 ret = fdt_setprop_string(blob, newoff, "label", part->name);
863 if (ret == -FDT_ERR_NOSPACE) {
864 ret = fdt_increase_size(blob, 512);
865 if (!ret)
866 goto add_label;
867 else
868 goto err_size;
869 } else if (ret < 0)
870 goto err_prop;
871
872 part_num++;
873 }
874 return 0;
875err_size:
876 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
877 return ret;
878err_prop:
879 printf("Can't add property: %s\n", fdt_strerror(ret));
880 return ret;
881}
882
883/*
884 * Update partitions in nor/nand nodes using info from
885 * mtdparts environment variable. The nodes to update are
886 * specified by node_info structure which contains mtd device
887 * type and compatible string: E. g. the board code in
888 * ft_board_setup() could use:
889 *
890 * struct node_info nodes[] = {
891 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
892 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
893 * };
894 *
895 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
896 */
897void fdt_fixup_mtdparts(void *blob, void *node_info, int node_info_size)
898{
899 struct node_info *ni = node_info;
900 struct mtd_device *dev;
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100901 int i, idx;
902 int noff;
903
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100904 if (mtdparts_init() != 0)
905 return;
906
907 for (i = 0; i < node_info_size; i++) {
908 idx = 0;
909 noff = fdt_node_offset_by_compatible(blob, -1, ni[i].compat);
910 while (noff != -FDT_ERR_NOTFOUND) {
911 debug("%s: %s, mtd dev type %d\n",
912 fdt_get_name(blob, noff, 0),
913 ni[i].compat, ni[i].type);
914 dev = device_find(ni[i].type, idx++);
915 if (dev) {
916 if (fdt_node_set_part_info(blob, noff, dev))
917 return; /* return on error */
918 }
919
920 /* Jump to next flash node */
921 noff = fdt_node_offset_by_compatible(blob, noff,
922 ni[i].compat);
923 }
924 }
925}
926#endif
Kumar Gala49b97d92010-03-30 10:19:26 -0500927
928void fdt_del_node_and_alias(void *blob, const char *alias)
929{
930 int off = fdt_path_offset(blob, alias);
931
932 if (off < 0)
933 return;
934
935 fdt_del_node(blob, off);
936
937 off = fdt_path_offset(blob, "/aliases");
938 fdt_delprop(blob, off, alias);
939}
Kumar Galaa0342c02010-06-16 14:27:38 -0500940
Kumar Galaa0342c02010-06-16 14:27:38 -0500941/* Max address size we deal with */
942#define OF_MAX_ADDR_CELLS 4
Bin Menga0ae3802015-12-07 01:39:47 -0800943#define OF_BAD_ADDR FDT_ADDR_T_NONE
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +0100944#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
945 (ns) > 0)
Kumar Galaa0342c02010-06-16 14:27:38 -0500946
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
Paul Burton0a222d52016-05-17 07:43:24 +0100960/**
961 * struct of_bus - Callbacks for bus specific translators
Paul Burton49717b12016-05-17 07:43:25 +0100962 * @name: A string used to identify this bus in debug output.
963 * @addresses: The name of the DT property from which addresses are
964 * to be read, typically "reg".
Paul Burton0a222d52016-05-17 07:43:24 +0100965 * @match: Return non-zero if the node whose parent is at
966 * parentoffset in the FDT blob corresponds to a bus
967 * of this type, otherwise return zero. If NULL a match
968 * is assumed.
Paul Burton49717b12016-05-17 07:43:25 +0100969 * @count_cells:Count how many cells (be32 values) a node whose parent
970 * is at parentoffset in the FDT blob will require to
971 * represent its address (written to *addrc) & size
972 * (written to *sizec).
973 * @map: Map the address addr from the address space of this
974 * bus to that of its parent, making use of the ranges
975 * read from DT to an array at range. na and ns are the
976 * number of cells (be32 values) used to hold and address
977 * or size, respectively, for this bus. pna is the number
978 * of cells used to hold an address for the parent bus.
979 * Returns the address in the address space of the parent
980 * bus.
981 * @translate: Update the value of the address cells at addr within an
982 * FDT by adding offset to it. na specifies the number of
983 * cells used to hold the address being translated. Returns
984 * zero on success, non-zero on error.
Paul Burton0a222d52016-05-17 07:43:24 +0100985 *
986 * Each bus type will include a struct of_bus in the of_busses array,
987 * providing implementations of some or all of the functions used to
988 * match the bus & handle address translation for its children.
989 */
Kumar Galaa0342c02010-06-16 14:27:38 -0500990struct of_bus {
991 const char *name;
992 const char *addresses;
Stephen Warren11e44fc2016-08-05 09:47:50 -0600993 int (*match)(const void *blob, int parentoffset);
994 void (*count_cells)(const void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -0500995 int *addrc, int *sizec);
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000996 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -0500997 int na, int ns, int pna);
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000998 int (*translate)(fdt32_t *addr, u64 offset, int na);
Kumar Galaa0342c02010-06-16 14:27:38 -0500999};
1000
1001/* Default translator (generic bus) */
Simon Glasseed36602017-05-18 20:09:26 -06001002void fdt_support_default_count_cells(const void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -05001003 int *addrc, int *sizec)
1004{
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001005 const fdt32_t *prop;
Scott Wood6395f312010-08-12 18:37:39 -05001006
Simon Glass933cdbb2014-10-23 18:58:57 -06001007 if (addrc)
1008 *addrc = fdt_address_cells(blob, parentoffset);
Scott Wood6395f312010-08-12 18:37:39 -05001009
1010 if (sizec) {
1011 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
1012 if (prop)
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001013 *sizec = be32_to_cpup(prop);
Scott Wood6395f312010-08-12 18:37:39 -05001014 else
1015 *sizec = 1;
1016 }
Kumar Galaa0342c02010-06-16 14:27:38 -05001017}
1018
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001019static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -05001020 int na, int ns, int pna)
1021{
1022 u64 cp, s, da;
1023
Simon Glasseed36602017-05-18 20:09:26 -06001024 cp = fdt_read_number(range, na);
1025 s = fdt_read_number(range + na + pna, ns);
1026 da = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001027
Simon Glasse48f3742014-11-11 12:47:07 -07001028 debug("OF: default map, cp=%" PRIu64 ", s=%" PRIu64
1029 ", da=%" PRIu64 "\n", cp, s, da);
Kumar Galaa0342c02010-06-16 14:27:38 -05001030
1031 if (da < cp || da >= (cp + s))
1032 return OF_BAD_ADDR;
1033 return da - cp;
1034}
1035
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001036static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -05001037{
Simon Glasseed36602017-05-18 20:09:26 -06001038 u64 a = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001039 memset(addr, 0, na * 4);
1040 a += offset;
1041 if (na > 1)
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001042 addr[na - 2] = cpu_to_fdt32(a >> 32);
1043 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
Kumar Galaa0342c02010-06-16 14:27:38 -05001044
1045 return 0;
1046}
1047
Paul Burton0a222d52016-05-17 07:43:24 +01001048#ifdef CONFIG_OF_ISA_BUS
1049
1050/* ISA bus translator */
Stephen Warren11e44fc2016-08-05 09:47:50 -06001051static int of_bus_isa_match(const void *blob, int parentoffset)
Paul Burton0a222d52016-05-17 07:43:24 +01001052{
1053 const char *name;
1054
1055 name = fdt_get_name(blob, parentoffset, NULL);
1056 if (!name)
1057 return 0;
1058
1059 return !strcmp(name, "isa");
1060}
1061
Stephen Warren11e44fc2016-08-05 09:47:50 -06001062static void of_bus_isa_count_cells(const void *blob, int parentoffset,
Paul Burton0a222d52016-05-17 07:43:24 +01001063 int *addrc, int *sizec)
1064{
1065 if (addrc)
1066 *addrc = 2;
1067 if (sizec)
1068 *sizec = 1;
1069}
1070
1071static u64 of_bus_isa_map(fdt32_t *addr, const fdt32_t *range,
1072 int na, int ns, int pna)
1073{
1074 u64 cp, s, da;
1075
1076 /* Check address type match */
1077 if ((addr[0] ^ range[0]) & cpu_to_be32(1))
1078 return OF_BAD_ADDR;
1079
Simon Glasseed36602017-05-18 20:09:26 -06001080 cp = fdt_read_number(range + 1, na - 1);
1081 s = fdt_read_number(range + na + pna, ns);
1082 da = fdt_read_number(addr + 1, na - 1);
Paul Burton0a222d52016-05-17 07:43:24 +01001083
1084 debug("OF: ISA map, cp=%" PRIu64 ", s=%" PRIu64
1085 ", da=%" PRIu64 "\n", cp, s, da);
1086
1087 if (da < cp || da >= (cp + s))
1088 return OF_BAD_ADDR;
1089 return da - cp;
1090}
1091
1092static int of_bus_isa_translate(fdt32_t *addr, u64 offset, int na)
1093{
1094 return of_bus_default_translate(addr + 1, offset, na - 1);
1095}
1096
1097#endif /* CONFIG_OF_ISA_BUS */
1098
Kumar Galaa0342c02010-06-16 14:27:38 -05001099/* Array of bus specific translators */
1100static struct of_bus of_busses[] = {
Paul Burton0a222d52016-05-17 07:43:24 +01001101#ifdef CONFIG_OF_ISA_BUS
1102 /* ISA */
1103 {
1104 .name = "isa",
1105 .addresses = "reg",
1106 .match = of_bus_isa_match,
1107 .count_cells = of_bus_isa_count_cells,
1108 .map = of_bus_isa_map,
1109 .translate = of_bus_isa_translate,
1110 },
1111#endif /* CONFIG_OF_ISA_BUS */
Kumar Galaa0342c02010-06-16 14:27:38 -05001112 /* Default */
1113 {
1114 .name = "default",
1115 .addresses = "reg",
Simon Glasseed36602017-05-18 20:09:26 -06001116 .count_cells = fdt_support_default_count_cells,
Kumar Galaa0342c02010-06-16 14:27:38 -05001117 .map = of_bus_default_map,
1118 .translate = of_bus_default_translate,
1119 },
1120};
1121
Stephen Warren11e44fc2016-08-05 09:47:50 -06001122static struct of_bus *of_match_bus(const void *blob, int parentoffset)
Paul Burton0a222d52016-05-17 07:43:24 +01001123{
1124 struct of_bus *bus;
1125
1126 if (ARRAY_SIZE(of_busses) == 1)
1127 return of_busses;
1128
1129 for (bus = of_busses; bus; bus++) {
1130 if (!bus->match || bus->match(blob, parentoffset))
1131 return bus;
1132 }
1133
1134 /*
1135 * We should always have matched the default bus at least, since
1136 * it has a NULL match field. If we didn't then it somehow isn't
1137 * in the of_busses array or something equally catastrophic has
1138 * gone wrong.
1139 */
1140 assert(0);
1141 return NULL;
1142}
1143
Stephen Warren11e44fc2016-08-05 09:47:50 -06001144static int of_translate_one(const void *blob, int parent, struct of_bus *bus,
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001145 struct of_bus *pbus, fdt32_t *addr,
Kumar Galaa0342c02010-06-16 14:27:38 -05001146 int na, int ns, int pna, const char *rprop)
1147{
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001148 const fdt32_t *ranges;
Kumar Galaa0342c02010-06-16 14:27:38 -05001149 int rlen;
1150 int rone;
1151 u64 offset = OF_BAD_ADDR;
1152
1153 /* Normally, an absence of a "ranges" property means we are
1154 * crossing a non-translatable boundary, and thus the addresses
1155 * below the current not cannot be converted to CPU physical ones.
1156 * Unfortunately, while this is very clear in the spec, it's not
1157 * what Apple understood, and they do have things like /uni-n or
1158 * /ht nodes with no "ranges" property and a lot of perfectly
1159 * useable mapped devices below them. Thus we treat the absence of
1160 * "ranges" as equivalent to an empty "ranges" property which means
1161 * a 1:1 translation at that level. It's up to the caller not to try
1162 * to translate addresses that aren't supposed to be translated in
1163 * the first place. --BenH.
1164 */
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001165 ranges = fdt_getprop(blob, parent, rprop, &rlen);
Kumar Galaa0342c02010-06-16 14:27:38 -05001166 if (ranges == NULL || rlen == 0) {
Simon Glasseed36602017-05-18 20:09:26 -06001167 offset = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001168 memset(addr, 0, pna * 4);
1169 debug("OF: no ranges, 1:1 translation\n");
1170 goto finish;
1171 }
1172
1173 debug("OF: walking ranges...\n");
1174
1175 /* Now walk through the ranges */
1176 rlen /= 4;
1177 rone = na + pna + ns;
1178 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1179 offset = bus->map(addr, ranges, na, ns, pna);
1180 if (offset != OF_BAD_ADDR)
1181 break;
1182 }
1183 if (offset == OF_BAD_ADDR) {
1184 debug("OF: not found !\n");
1185 return 1;
1186 }
1187 memcpy(addr, ranges + na, 4 * pna);
1188
1189 finish:
1190 of_dump_addr("OF: parent translation for:", addr, pna);
Simon Glasse48f3742014-11-11 12:47:07 -07001191 debug("OF: with offset: %" PRIu64 "\n", offset);
Kumar Galaa0342c02010-06-16 14:27:38 -05001192
1193 /* Translate it into parent bus space */
1194 return pbus->translate(addr, offset, pna);
1195}
1196
1197/*
1198 * Translate an address from the device-tree into a CPU physical address,
1199 * this walks up the tree and applies the various bus mappings on the
1200 * way.
1201 *
1202 * Note: We consider that crossing any level with #size-cells == 0 to mean
1203 * that translation is impossible (that is we are not dealing with a value
1204 * that can be mapped to a cpu physical address). This is not really specified
1205 * that way, but this is traditionally the way IBM at least do things
1206 */
Stephen Warren11e44fc2016-08-05 09:47:50 -06001207static u64 __of_translate_address(const void *blob, int node_offset,
1208 const fdt32_t *in_addr, const char *rprop)
Kumar Galaa0342c02010-06-16 14:27:38 -05001209{
1210 int parent;
1211 struct of_bus *bus, *pbus;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001212 fdt32_t addr[OF_MAX_ADDR_CELLS];
Kumar Galaa0342c02010-06-16 14:27:38 -05001213 int na, ns, pna, pns;
1214 u64 result = OF_BAD_ADDR;
1215
1216 debug("OF: ** translation for device %s **\n",
1217 fdt_get_name(blob, node_offset, NULL));
1218
1219 /* Get parent & match bus type */
1220 parent = fdt_parent_offset(blob, node_offset);
1221 if (parent < 0)
1222 goto bail;
Paul Burton0a222d52016-05-17 07:43:24 +01001223 bus = of_match_bus(blob, parent);
Kumar Galaa0342c02010-06-16 14:27:38 -05001224
1225 /* Cound address cells & copy address locally */
Scott Wood6395f312010-08-12 18:37:39 -05001226 bus->count_cells(blob, parent, &na, &ns);
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +01001227 if (!OF_CHECK_COUNTS(na, ns)) {
Kumar Galaa0342c02010-06-16 14:27:38 -05001228 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1229 fdt_get_name(blob, node_offset, NULL));
1230 goto bail;
1231 }
1232 memcpy(addr, in_addr, na * 4);
1233
1234 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1235 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1236 of_dump_addr("OF: translating address:", addr, na);
1237
1238 /* Translate */
1239 for (;;) {
1240 /* Switch to parent bus */
1241 node_offset = parent;
1242 parent = fdt_parent_offset(blob, node_offset);
1243
1244 /* If root, we have finished */
1245 if (parent < 0) {
1246 debug("OF: reached root node\n");
Simon Glasseed36602017-05-18 20:09:26 -06001247 result = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001248 break;
1249 }
1250
1251 /* Get new parent bus and counts */
Paul Burton0a222d52016-05-17 07:43:24 +01001252 pbus = of_match_bus(blob, parent);
Scott Wood6395f312010-08-12 18:37:39 -05001253 pbus->count_cells(blob, parent, &pna, &pns);
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +01001254 if (!OF_CHECK_COUNTS(pna, pns)) {
Kumar Galaa0342c02010-06-16 14:27:38 -05001255 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1256 fdt_get_name(blob, node_offset, NULL));
1257 break;
1258 }
1259
1260 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1261 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1262
1263 /* Apply bus translation */
1264 if (of_translate_one(blob, node_offset, bus, pbus,
1265 addr, na, ns, pna, rprop))
1266 break;
1267
1268 /* Complete the move up one level */
1269 na = pna;
1270 ns = pns;
1271 bus = pbus;
1272
1273 of_dump_addr("OF: one level translation:", addr, na);
1274 }
1275 bail:
1276
1277 return result;
1278}
1279
Stephen Warren11e44fc2016-08-05 09:47:50 -06001280u64 fdt_translate_address(const void *blob, int node_offset,
1281 const fdt32_t *in_addr)
Kumar Galaa0342c02010-06-16 14:27:38 -05001282{
1283 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1284}
Kumar Gala75e73af2010-07-04 12:48:21 -05001285
1286/**
1287 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1288 * who's reg property matches a physical cpu address
1289 *
1290 * @blob: ptr to device tree
1291 * @compat: compatiable string to match
1292 * @compat_off: property name
1293 *
1294 */
1295int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1296 phys_addr_t compat_off)
1297{
1298 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1299 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001300 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
Kumar Gala75e73af2010-07-04 12:48:21 -05001301 if (reg) {
1302 if (compat_off == fdt_translate_address(blob, off, reg))
1303 return off;
1304 }
1305 off = fdt_node_offset_by_compatible(blob, off, compat);
1306 }
1307
1308 return -FDT_ERR_NOTFOUND;
1309}
1310
Kumar Galab4b847e2010-07-09 16:18:58 -05001311/**
1312 * fdt_alloc_phandle: Return next free phandle value
1313 *
1314 * @blob: ptr to device tree
1315 */
1316int fdt_alloc_phandle(void *blob)
1317{
Masahiro Yamadab4141192014-11-07 03:03:31 +09001318 int offset;
1319 uint32_t phandle = 0;
Kumar Gala75e73af2010-07-04 12:48:21 -05001320
Kumar Galab4b847e2010-07-09 16:18:58 -05001321 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1322 offset = fdt_next_node(blob, offset, NULL)) {
Timur Tabi50bf17b2011-09-20 18:24:35 -05001323 phandle = max(phandle, fdt_get_phandle(blob, offset));
Kumar Galab4b847e2010-07-09 16:18:58 -05001324 }
1325
1326 return phandle + 1;
1327}
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001328
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001329/*
Kumar Galaf117c0f2011-08-01 00:23:23 -05001330 * fdt_set_phandle: Create a phandle property for the given node
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001331 *
1332 * @fdt: ptr to device tree
1333 * @nodeoffset: node to update
1334 * @phandle: phandle value to set (must be unique)
Kumar Galaf117c0f2011-08-01 00:23:23 -05001335 */
1336int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001337{
1338 int ret;
1339
1340#ifdef DEBUG
1341 int off = fdt_node_offset_by_phandle(fdt, phandle);
1342
1343 if ((off >= 0) && (off != nodeoffset)) {
1344 char buf[64];
1345
1346 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1347 printf("Trying to update node %s with phandle %u ",
1348 buf, phandle);
1349
1350 fdt_get_path(fdt, off, buf, sizeof(buf));
1351 printf("that already exists in node %s.\n", buf);
1352 return -FDT_ERR_BADPHANDLE;
1353 }
1354#endif
1355
1356 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1357 if (ret < 0)
1358 return ret;
1359
1360 /*
1361 * For now, also set the deprecated "linux,phandle" property, so that we
1362 * don't break older kernels.
1363 */
1364 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1365
1366 return ret;
1367}
1368
Kumar Gala10aeabd2011-08-01 00:25:20 -05001369/*
1370 * fdt_create_phandle: Create a phandle property for the given node
1371 *
1372 * @fdt: ptr to device tree
1373 * @nodeoffset: node to update
1374 */
Timur Tabi3c927cc2011-09-20 18:24:34 -05001375unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
Kumar Gala10aeabd2011-08-01 00:25:20 -05001376{
1377 /* see if there is a phandle already */
1378 int phandle = fdt_get_phandle(fdt, nodeoffset);
1379
1380 /* if we got 0, means no phandle so create one */
1381 if (phandle == 0) {
Timur Tabi3c927cc2011-09-20 18:24:34 -05001382 int ret;
1383
Kumar Gala10aeabd2011-08-01 00:25:20 -05001384 phandle = fdt_alloc_phandle(fdt);
Timur Tabi3c927cc2011-09-20 18:24:34 -05001385 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1386 if (ret < 0) {
1387 printf("Can't set phandle %u: %s\n", phandle,
1388 fdt_strerror(ret));
1389 return 0;
1390 }
Kumar Gala10aeabd2011-08-01 00:25:20 -05001391 }
1392
1393 return phandle;
1394}
1395
Shengzhou Liu2a523f52011-10-14 16:26:05 +08001396/*
1397 * fdt_set_node_status: Set status for the given node
1398 *
1399 * @fdt: ptr to device tree
1400 * @nodeoffset: node to update
1401 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1402 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1403 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1404 */
1405int fdt_set_node_status(void *fdt, int nodeoffset,
1406 enum fdt_status status, unsigned int error_code)
1407{
1408 char buf[16];
1409 int ret = 0;
1410
1411 if (nodeoffset < 0)
1412 return nodeoffset;
1413
1414 switch (status) {
1415 case FDT_STATUS_OKAY:
1416 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1417 break;
1418 case FDT_STATUS_DISABLED:
1419 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1420 break;
1421 case FDT_STATUS_FAIL:
1422 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1423 break;
1424 case FDT_STATUS_FAIL_ERROR_CODE:
1425 sprintf(buf, "fail-%d", error_code);
1426 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1427 break;
1428 default:
1429 printf("Invalid fdt status: %x\n", status);
1430 ret = -1;
1431 break;
1432 }
1433
1434 return ret;
1435}
1436
1437/*
1438 * fdt_set_status_by_alias: Set status for the given node given an alias
1439 *
1440 * @fdt: ptr to device tree
1441 * @alias: alias of node to update
1442 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1443 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1444 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1445 */
1446int fdt_set_status_by_alias(void *fdt, const char* alias,
1447 enum fdt_status status, unsigned int error_code)
1448{
1449 int offset = fdt_path_offset(fdt, alias);
1450
1451 return fdt_set_node_status(fdt, offset, status, error_code);
1452}
1453
Tom Wai-Hong Tam096eb3f2012-12-05 14:46:41 +00001454#if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001455int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1456{
1457 int noff;
1458 int ret;
1459
1460 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1461 if (noff != -FDT_ERR_NOTFOUND) {
1462 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1463add_edid:
1464 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1465 if (ret == -FDT_ERR_NOSPACE) {
1466 ret = fdt_increase_size(blob, 512);
1467 if (!ret)
1468 goto add_edid;
1469 else
1470 goto err_size;
1471 } else if (ret < 0) {
1472 printf("Can't add property: %s\n", fdt_strerror(ret));
1473 return ret;
1474 }
1475 }
1476 return 0;
1477err_size:
1478 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1479 return ret;
1480}
1481#endif
Timur Tabibb682002011-05-03 13:24:07 -05001482
1483/*
1484 * Verify the physical address of device tree node for a given alias
1485 *
1486 * This function locates the device tree node of a given alias, and then
1487 * verifies that the physical address of that device matches the given
1488 * parameter. It displays a message if there is a mismatch.
1489 *
1490 * Returns 1 on success, 0 on failure
1491 */
1492int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1493{
1494 const char *path;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001495 const fdt32_t *reg;
Timur Tabibb682002011-05-03 13:24:07 -05001496 int node, len;
1497 u64 dt_addr;
1498
1499 path = fdt_getprop(fdt, anode, alias, NULL);
1500 if (!path) {
1501 /* If there's no such alias, then it's not a failure */
1502 return 1;
1503 }
1504
1505 node = fdt_path_offset(fdt, path);
1506 if (node < 0) {
1507 printf("Warning: device tree alias '%s' points to invalid "
1508 "node %s.\n", alias, path);
1509 return 0;
1510 }
1511
1512 reg = fdt_getprop(fdt, node, "reg", &len);
1513 if (!reg) {
1514 printf("Warning: device tree node '%s' has no address.\n",
1515 path);
1516 return 0;
1517 }
1518
1519 dt_addr = fdt_translate_address(fdt, node, reg);
1520 if (addr != dt_addr) {
Simon Glasse48f3742014-11-11 12:47:07 -07001521 printf("Warning: U-Boot configured device %s at address %"
1522 PRIx64 ",\n but the device tree has it address %"
1523 PRIx64 ".\n", alias, addr, dt_addr);
Timur Tabibb682002011-05-03 13:24:07 -05001524 return 0;
1525 }
1526
1527 return 1;
1528}
1529
1530/*
1531 * Returns the base address of an SOC or PCI node
1532 */
Simon Glassec002112017-05-18 20:09:00 -06001533u64 fdt_get_base_address(const void *fdt, int node)
Timur Tabibb682002011-05-03 13:24:07 -05001534{
1535 int size;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001536 const fdt32_t *prop;
Timur Tabibb682002011-05-03 13:24:07 -05001537
Simon Glass336a4482017-07-04 13:31:20 -06001538 prop = fdt_getprop(fdt, node, "reg", &size);
Timur Tabibb682002011-05-03 13:24:07 -05001539
Simon Glass336a4482017-07-04 13:31:20 -06001540 return prop ? fdt_translate_address(fdt, node, prop) : 0;
Timur Tabibb682002011-05-03 13:24:07 -05001541}
Alexander Grafc48e6862014-04-11 17:09:41 +02001542
1543/*
1544 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1545 */
1546static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1547 uint64_t *val, int cells)
1548{
1549 const fdt32_t *prop32 = &prop[cell_off];
1550 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];
1551
1552 if ((cell_off + cells) > prop_len)
1553 return -FDT_ERR_NOSPACE;
1554
1555 switch (cells) {
1556 case 1:
1557 *val = fdt32_to_cpu(*prop32);
1558 break;
1559 case 2:
1560 *val = fdt64_to_cpu(*prop64);
1561 break;
1562 default:
1563 return -FDT_ERR_NOSPACE;
1564 }
1565
1566 return 0;
1567}
1568
1569/**
1570 * fdt_read_range - Read a node's n'th range property
1571 *
1572 * @fdt: ptr to device tree
1573 * @node: offset of node
1574 * @n: range index
1575 * @child_addr: pointer to storage for the "child address" field
1576 * @addr: pointer to storage for the CPU view translated physical start
1577 * @len: pointer to storage for the range length
1578 *
1579 * Convenience function that reads and interprets a specific range out of
1580 * a number of the "ranges" property array.
1581 */
1582int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1583 uint64_t *addr, uint64_t *len)
1584{
1585 int pnode = fdt_parent_offset(fdt, node);
1586 const fdt32_t *ranges;
1587 int pacells;
1588 int acells;
1589 int scells;
1590 int ranges_len;
1591 int cell = 0;
1592 int r = 0;
1593
1594 /*
1595 * The "ranges" property is an array of
1596 * { <child address> <parent address> <size in child address space> }
1597 *
1598 * All 3 elements can span a diffent number of cells. Fetch their size.
1599 */
1600 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1601 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1602 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1603
1604 /* Now try to get the ranges property */
1605 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1606 if (!ranges)
1607 return -FDT_ERR_NOTFOUND;
1608 ranges_len /= sizeof(uint32_t);
1609
1610 /* Jump to the n'th entry */
1611 cell = n * (pacells + acells + scells);
1612
1613 /* Read <child address> */
1614 if (child_addr) {
1615 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1616 acells);
1617 if (r)
1618 return r;
1619 }
1620 cell += acells;
1621
1622 /* Read <parent address> */
1623 if (addr)
1624 *addr = fdt_translate_address(fdt, node, ranges + cell);
1625 cell += pacells;
1626
1627 /* Read <size in child address space> */
1628 if (len) {
1629 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
1630 if (r)
1631 return r;
1632 }
1633
1634 return 0;
1635}
Hans de Goeded4f495a2014-11-17 15:29:11 +01001636
1637/**
1638 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1639 *
1640 * @fdt: ptr to device tree
1641 * @node: offset of the simplefb node
1642 * @base_address: framebuffer base address
1643 * @width: width in pixels
1644 * @height: height in pixels
1645 * @stride: bytes per line
1646 * @format: pixel format string
1647 *
1648 * Convenience function to fill and enable a simplefb node.
1649 */
1650int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
1651 u32 height, u32 stride, const char *format)
1652{
1653 char name[32];
1654 fdt32_t cells[4];
1655 int i, addrc, sizec, ret;
1656
Simon Glasseed36602017-05-18 20:09:26 -06001657 fdt_support_default_count_cells(fdt, fdt_parent_offset(fdt, node),
1658 &addrc, &sizec);
Hans de Goeded4f495a2014-11-17 15:29:11 +01001659 i = 0;
1660 if (addrc == 2)
1661 cells[i++] = cpu_to_fdt32(base_address >> 32);
1662 cells[i++] = cpu_to_fdt32(base_address);
1663 if (sizec == 2)
1664 cells[i++] = 0;
1665 cells[i++] = cpu_to_fdt32(height * stride);
1666
1667 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
1668 if (ret < 0)
1669 return ret;
1670
Simon Glassc3ec6462015-04-20 12:37:16 -06001671 snprintf(name, sizeof(name), "framebuffer@%" PRIx64, base_address);
Hans de Goeded4f495a2014-11-17 15:29:11 +01001672 ret = fdt_set_name(fdt, node, name);
1673 if (ret < 0)
1674 return ret;
1675
1676 ret = fdt_setprop_u32(fdt, node, "width", width);
1677 if (ret < 0)
1678 return ret;
1679
1680 ret = fdt_setprop_u32(fdt, node, "height", height);
1681 if (ret < 0)
1682 return ret;
1683
1684 ret = fdt_setprop_u32(fdt, node, "stride", stride);
1685 if (ret < 0)
1686 return ret;
1687
1688 ret = fdt_setprop_string(fdt, node, "format", format);
1689 if (ret < 0)
1690 return ret;
1691
1692 ret = fdt_setprop_string(fdt, node, "status", "okay");
1693 if (ret < 0)
1694 return ret;
1695
1696 return 0;
1697}
Tim Harvey08daa252015-04-08 11:45:39 -07001698
1699/*
1700 * Update native-mode in display-timings from display environment variable.
1701 * The node to update are specified by path.
1702 */
1703int fdt_fixup_display(void *blob, const char *path, const char *display)
1704{
1705 int off, toff;
1706
1707 if (!display || !path)
1708 return -FDT_ERR_NOTFOUND;
1709
1710 toff = fdt_path_offset(blob, path);
1711 if (toff >= 0)
1712 toff = fdt_subnode_offset(blob, toff, "display-timings");
1713 if (toff < 0)
1714 return toff;
1715
1716 for (off = fdt_first_subnode(blob, toff);
1717 off >= 0;
1718 off = fdt_next_subnode(blob, off)) {
1719 uint32_t h = fdt_get_phandle(blob, off);
1720 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL),
1721 fdt32_to_cpu(h));
1722 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0)
1723 return fdt_setprop_u32(blob, toff, "native-mode", h);
1724 }
1725 return toff;
1726}
Pantelis Antonioufc7c3182017-09-04 23:12:11 +03001727
1728#ifdef CONFIG_OF_LIBFDT_OVERLAY
1729/**
1730 * fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting
1731 *
1732 * @fdt: ptr to device tree
1733 * @fdto: ptr to device tree overlay
1734 *
1735 * Convenience function to apply an overlay and display helpful messages
1736 * in the case of an error
1737 */
1738int fdt_overlay_apply_verbose(void *fdt, void *fdto)
1739{
1740 int err;
1741 bool has_symbols;
1742
1743 err = fdt_path_offset(fdt, "/__symbols__");
1744 has_symbols = err >= 0;
1745
1746 err = fdt_overlay_apply(fdt, fdto);
1747 if (err < 0) {
1748 printf("failed on fdt_overlay_apply(): %s\n",
1749 fdt_strerror(err));
1750 if (!has_symbols) {
1751 printf("base fdt does did not have a /__symbols__ node\n");
1752 printf("make sure you've compiled with -@\n");
1753 }
1754 }
1755 return err;
1756}
1757#endif