blob: 9844c70be8061f59b1a61baf5b236445b29224bb [file] [log] [blame]
Tom Rini10e47792018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
Gerald Van Barenc4a57ea2007-04-06 14:19:43 -04002/*
3 * (C) Copyright 2007
4 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
5 *
Shengzhou Liua7be8022011-10-14 16:26:05 +08006 * Copyright 2010-2011 Freescale Semiconductor, Inc.
Gerald Van Barenc4a57ea2007-04-06 14:19:43 -04007 */
8
9#include <common.h>
Rasmus Villemoesbd2e3532022-08-22 09:34:23 +020010#include <abuf.h>
Simon Glass0af6e2d2019-08-01 09:46:52 -060011#include <env.h>
Simon Glass0f2af882020-05-10 11:40:05 -060012#include <log.h>
Heinrich Schuchardt668cabc2018-11-18 17:58:51 +010013#include <mapmem.h>
Simon Glass274e0b02020-05-10 11:39:56 -060014#include <net.h>
Anton Vorontsov9e9cf602009-10-15 17:47:04 +040015#include <stdio_dev.h>
Patrick Delaunaye0682262023-06-08 17:16:37 +020016#include <dm/ofnode.h>
Gerald Van Barenc4a57ea2007-04-06 14:19:43 -040017#include <linux/ctype.h>
18#include <linux/types.h>
Gerald Van Barenc4a57ea2007-04-06 14:19:43 -040019#include <asm/global_data.h>
Sam Protsenko94483d22024-03-29 19:55:53 -050020#include <asm/unaligned.h>
Masahiro Yamada75f82d02018-03-05 01:20:11 +090021#include <linux/libfdt.h>
Gerald Van Barenc4a57ea2007-04-06 14:19:43 -040022#include <fdt_support.h>
Kumar Gala2dc9b4a2007-11-26 17:06:15 -060023#include <exports.h>
Bin Mengd9a00932015-12-07 01:39:47 -080024#include <fdtdec.h>
Francesco Dolcini05cc8272022-05-19 16:22:26 +020025#include <version.h>
Gerald Van Barenc4a57ea2007-04-06 14:19:43 -040026
Kumar Gala1ba00402008-10-23 00:05:47 -050027/**
Alexander Graf7c8a6cf2014-04-11 17:09:40 +020028 * fdt_getprop_u32_default_node - Return a node's property or a default
29 *
30 * @fdt: ptr to device tree
31 * @off: offset of node
32 * @cell: cell offset in property
33 * @prop: property name
34 * @dflt: default value if the property isn't found
35 *
36 * Convenience function to return a node's property or a default value if
37 * the property doesn't exist.
38 */
39u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
40 const char *prop, const u32 dflt)
41{
42 const fdt32_t *val;
43 int len;
44
45 val = fdt_getprop(fdt, off, prop, &len);
46
47 /* Check if property exists */
48 if (!val)
49 return dflt;
50
51 /* Check if property is long enough */
52 if (len < ((cell + 1) * sizeof(uint32_t)))
53 return dflt;
54
55 return fdt32_to_cpu(*val);
56}
57
58/**
Kumar Gala1ba00402008-10-23 00:05:47 -050059 * fdt_getprop_u32_default - Find a node and return it's property or a default
60 *
61 * @fdt: ptr to device tree
62 * @path: path of node
63 * @prop: property name
64 * @dflt: default value if the property isn't found
65 *
66 * Convenience function to find a node and return it's property or a
67 * default value if it doesn't exist.
68 */
Gabe Blackcd37de72011-11-08 01:09:44 -080069u32 fdt_getprop_u32_default(const void *fdt, const char *path,
70 const char *prop, const u32 dflt)
Kumar Gala1ba00402008-10-23 00:05:47 -050071{
Kumar Gala1ba00402008-10-23 00:05:47 -050072 int off;
73
74 off = fdt_path_offset(fdt, path);
75 if (off < 0)
76 return dflt;
77
Alexander Graf7c8a6cf2014-04-11 17:09:40 +020078 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt);
Kumar Gala1ba00402008-10-23 00:05:47 -050079}
Gerald Van Barenc4a57ea2007-04-06 14:19:43 -040080
Kumar Galabf771dc2007-10-24 10:21:57 -050081/**
82 * fdt_find_and_setprop: Find a node and set it's property
83 *
84 * @fdt: ptr to device tree
85 * @node: path of node
86 * @prop: property name
87 * @val: ptr to new value
88 * @len: length of new property value
89 * @create: flag to create the property if it doesn't exist
90 *
91 * Convenience function to directly set a property given the path to the node.
92 */
93int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
94 const void *val, int len, int create)
95{
Kumar Galac8ab7052007-10-24 11:04:22 -050096 int nodeoff = fdt_path_offset(fdt, node);
Kumar Galabf771dc2007-10-24 10:21:57 -050097
98 if (nodeoff < 0)
99 return nodeoff;
100
Kim Phillips6542c072013-01-16 14:00:11 +0000101 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
Kumar Galabf771dc2007-10-24 10:21:57 -0500102 return 0; /* create flag not set; so exit quietly */
103
104 return fdt_setprop(fdt, nodeoff, prop, val, len);
105}
106
Masahiro Yamadac0207282014-04-18 17:40:58 +0900107/**
Simon Glass014aa052014-10-23 18:58:49 -0600108 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
109 *
Masahiro Yamadac0207282014-04-18 17:40:58 +0900110 * @fdt: pointer to the device tree blob
111 * @parentoffset: structure block offset of a node
112 * @name: name of the subnode to locate
113 *
114 * fdt_subnode_offset() finds a subnode of the node with a given name.
115 * If the subnode does not exist, it will be created.
116 */
Simon Glass014aa052014-10-23 18:58:49 -0600117int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name)
Masahiro Yamadac0207282014-04-18 17:40:58 +0900118{
119 int offset;
120
121 offset = fdt_subnode_offset(fdt, parentoffset, name);
122
123 if (offset == -FDT_ERR_NOTFOUND)
124 offset = fdt_add_subnode(fdt, parentoffset, name);
125
126 if (offset < 0)
127 printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset));
128
129 return offset;
130}
131
Andre Przywara0d1fcf82021-02-14 10:35:18 +0000132#if defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
Detlev Zundel46e192a2008-06-20 22:24:05 +0200133static int fdt_fixup_stdout(void *fdt, int chosenoff)
Kumar Gala2dc9b4a2007-11-26 17:06:15 -0600134{
Masahiro Yamadaa467792c62014-04-18 17:41:01 +0900135 int err;
136 int aliasoff;
Kumar Gala2dc9b4a2007-11-26 17:06:15 -0600137 char sername[9] = { 0 };
Masahiro Yamadaa467792c62014-04-18 17:41:01 +0900138 const void *path;
139 int len;
140 char tmp[256]; /* long enough */
Kumar Gala2dc9b4a2007-11-26 17:06:15 -0600141
Bin Mengb8199112016-01-13 19:38:58 -0800142 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
Kumar Gala2dc9b4a2007-11-26 17:06:15 -0600143
Masahiro Yamadaa467792c62014-04-18 17:41:01 +0900144 aliasoff = fdt_path_offset(fdt, "/aliases");
145 if (aliasoff < 0) {
146 err = aliasoff;
Scott Woodedd551f2015-09-01 22:48:08 -0500147 goto noalias;
Kumar Gala2dc9b4a2007-11-26 17:06:15 -0600148 }
Masahiro Yamadaa467792c62014-04-18 17:41:01 +0900149
150 path = fdt_getprop(fdt, aliasoff, sername, &len);
151 if (!path) {
152 err = len;
Scott Woodedd551f2015-09-01 22:48:08 -0500153 goto noalias;
Masahiro Yamadaa467792c62014-04-18 17:41:01 +0900154 }
155
156 /* fdt_setprop may break "path" so we copy it to tmp buffer */
157 memcpy(tmp, path, len);
158
159 err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len);
Kumar Gala2dc9b4a2007-11-26 17:06:15 -0600160 if (err < 0)
161 printf("WARNING: could not set linux,stdout-path %s.\n",
Masahiro Yamadaa467792c62014-04-18 17:41:01 +0900162 fdt_strerror(err));
Kumar Gala2dc9b4a2007-11-26 17:06:15 -0600163
164 return err;
Scott Woodedd551f2015-09-01 22:48:08 -0500165
166noalias:
167 printf("WARNING: %s: could not read %s alias: %s\n",
168 __func__, sername, fdt_strerror(err));
169
170 return 0;
Kumar Gala2dc9b4a2007-11-26 17:06:15 -0600171}
Masahiro Yamadaa467792c62014-04-18 17:41:01 +0900172#else
173static int fdt_fixup_stdout(void *fdt, int chosenoff)
174{
175 return 0;
176}
Kumar Gala2dc9b4a2007-11-26 17:06:15 -0600177#endif
178
Masahiro Yamadab891a342014-04-18 17:41:04 +0900179static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name,
180 uint64_t val, int is_u64)
181{
182 if (is_u64)
183 return fdt_setprop_u64(fdt, nodeoffset, name, val);
184 else
185 return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val);
186}
187
Paul Kocialkowski2c0fbc72015-05-21 11:27:03 +0200188int fdt_root(void *fdt)
189{
190 char *serial;
191 int err;
192
193 err = fdt_check_header(fdt);
194 if (err < 0) {
195 printf("fdt_root: %s\n", fdt_strerror(err));
196 return err;
197 }
198
Simon Glass64b723f2017-08-03 12:22:12 -0600199 serial = env_get("serial#");
Paul Kocialkowski2c0fbc72015-05-21 11:27:03 +0200200 if (serial) {
201 err = fdt_setprop(fdt, 0, "serial-number", serial,
202 strlen(serial) + 1);
203
204 if (err < 0) {
205 printf("WARNING: could not set serial-number %s.\n",
206 fdt_strerror(err));
207 return err;
208 }
209 }
210
211 return 0;
212}
Masahiro Yamadab891a342014-04-18 17:41:04 +0900213
Masahiro Yamada5b114892014-04-18 17:40:59 +0900214int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end)
Gerald Van Barenc4a57ea2007-04-06 14:19:43 -0400215{
Masahiro Yamadab891a342014-04-18 17:41:04 +0900216 int nodeoffset;
Kumar Gala99ebc052008-08-15 08:24:43 -0500217 int err, j, total;
Masahiro Yamadab891a342014-04-18 17:41:04 +0900218 int is_u64;
Kumar Gala99ebc052008-08-15 08:24:43 -0500219 uint64_t addr, size;
Gerald Van Barenc4a57ea2007-04-06 14:19:43 -0400220
Masahiro Yamada9a3b4de2014-04-18 17:41:05 +0900221 /* just return if the size of initrd is zero */
222 if (initrd_start == initrd_end)
223 return 0;
224
Masahiro Yamadac0207282014-04-18 17:40:58 +0900225 /* find or create "/chosen" node. */
226 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
227 if (nodeoffset < 0)
Kumar Gala99ebc052008-08-15 08:24:43 -0500228 return nodeoffset;
Gerald Van Barenc4a57ea2007-04-06 14:19:43 -0400229
Kumar Gala99ebc052008-08-15 08:24:43 -0500230 total = fdt_num_mem_rsv(fdt);
231
232 /*
233 * Look for an existing entry and update it. If we don't find
234 * the entry, we will j be the next available slot.
235 */
236 for (j = 0; j < total; j++) {
237 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
238 if (addr == initrd_start) {
239 fdt_del_mem_rsv(fdt, j);
240 break;
Gerald Van Barenc9502b92007-04-14 22:51:24 -0400241 }
Kumar Gala99ebc052008-08-15 08:24:43 -0500242 }
243
Grant Likelyc379a562011-03-28 09:58:55 +0000244 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
Kumar Gala99ebc052008-08-15 08:24:43 -0500245 if (err < 0) {
246 printf("fdt_initrd: %s\n", fdt_strerror(err));
247 return err;
248 }
Kumar Galac8ab7052007-10-24 11:04:22 -0500249
Simon Glass9fbc6322014-10-23 18:58:57 -0600250 is_u64 = (fdt_address_cells(fdt, 0) == 2);
David Fengd9850132013-12-14 11:47:29 +0800251
Masahiro Yamadab891a342014-04-18 17:41:04 +0900252 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start",
253 (uint64_t)initrd_start, is_u64);
254
Masahiro Yamada5b114892014-04-18 17:40:59 +0900255 if (err < 0) {
256 printf("WARNING: could not set linux,initrd-start %s.\n",
257 fdt_strerror(err));
258 return err;
259 }
Masahiro Yamadab891a342014-04-18 17:41:04 +0900260
261 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end",
262 (uint64_t)initrd_end, is_u64);
263
Masahiro Yamada5b114892014-04-18 17:40:59 +0900264 if (err < 0) {
265 printf("WARNING: could not set linux,initrd-end %s.\n",
266 fdt_strerror(err));
Kumar Gala99ebc052008-08-15 08:24:43 -0500267
Masahiro Yamada5b114892014-04-18 17:40:59 +0900268 return err;
Gerald Van Barenc4a57ea2007-04-06 14:19:43 -0400269 }
270
Kumar Gala99ebc052008-08-15 08:24:43 -0500271 return 0;
272}
273
Niko Mauno673db432021-02-22 19:18:51 +0000274/**
275 * board_fdt_chosen_bootargs - boards may override this function to use
276 * alternative kernel command line arguments
277 */
278__weak char *board_fdt_chosen_bootargs(void)
279{
280 return env_get("bootargs");
281}
282
Masahiro Yamada451c2042014-04-18 17:41:00 +0900283int fdt_chosen(void *fdt)
Kumar Gala99ebc052008-08-15 08:24:43 -0500284{
Rasmus Villemoesbd2e3532022-08-22 09:34:23 +0200285 struct abuf buf = {};
Kumar Gala99ebc052008-08-15 08:24:43 -0500286 int nodeoffset;
287 int err;
288 char *str; /* used to set string properties */
Kumar Gala99ebc052008-08-15 08:24:43 -0500289
290 err = fdt_check_header(fdt);
291 if (err < 0) {
292 printf("fdt_chosen: %s\n", fdt_strerror(err));
293 return err;
294 }
295
Masahiro Yamadac0207282014-04-18 17:40:58 +0900296 /* find or create "/chosen" node. */
297 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
298 if (nodeoffset < 0)
299 return nodeoffset;
Gerald Van Barenc4a57ea2007-04-06 14:19:43 -0400300
Rasmus Villemoesbd2e3532022-08-22 09:34:23 +0200301 if (IS_ENABLED(CONFIG_BOARD_RNG_SEED) && !board_rng_seed(&buf)) {
302 err = fdt_setprop(fdt, nodeoffset, "rng-seed",
303 abuf_data(&buf), abuf_size(&buf));
304 abuf_uninit(&buf);
305 if (err < 0) {
306 printf("WARNING: could not set rng-seed %s.\n",
307 fdt_strerror(err));
308 return err;
309 }
310 }
311
Niko Mauno673db432021-02-22 19:18:51 +0000312 str = board_fdt_chosen_bootargs();
313
Masahiro Yamadaa467792c62014-04-18 17:41:01 +0900314 if (str) {
315 err = fdt_setprop(fdt, nodeoffset, "bootargs", str,
316 strlen(str) + 1);
317 if (err < 0) {
Masahiro Yamada451c2042014-04-18 17:41:00 +0900318 printf("WARNING: could not set bootargs %s.\n",
319 fdt_strerror(err));
Masahiro Yamadaa467792c62014-04-18 17:41:01 +0900320 return err;
321 }
Gerald Van Barenc4a57ea2007-04-06 14:19:43 -0400322 }
Kumar Gala2dc9b4a2007-11-26 17:06:15 -0600323
Francesco Dolcini05cc8272022-05-19 16:22:26 +0200324 /* add u-boot version */
325 err = fdt_setprop(fdt, nodeoffset, "u-boot,version", PLAIN_VERSION,
326 strlen(PLAIN_VERSION) + 1);
327 if (err < 0) {
328 printf("WARNING: could not set u-boot,version %s.\n",
329 fdt_strerror(err));
330 return err;
331 }
332
Masahiro Yamadaa467792c62014-04-18 17:41:01 +0900333 return fdt_fixup_stdout(fdt, nodeoffset);
Gerald Van Barenc4a57ea2007-04-06 14:19:43 -0400334}
335
Kumar Gala7e64cf82007-11-03 19:46:28 -0500336void do_fixup_by_path(void *fdt, const char *path, const char *prop,
337 const void *val, int len, int create)
338{
339#if defined(DEBUG)
340 int i;
Kumar Gala88f0ca22008-02-13 15:09:58 -0600341 debug("Updating property '%s/%s' = ", path, prop);
Kumar Gala7e64cf82007-11-03 19:46:28 -0500342 for (i = 0; i < len; i++)
343 debug(" %.2x", *(u8*)(val+i));
344 debug("\n");
345#endif
346 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
347 if (rc)
348 printf("Unable to update property %s:%s, err=%s\n",
349 path, prop, fdt_strerror(rc));
350}
351
352void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
353 u32 val, int create)
354{
Kim Phillips6542c072013-01-16 14:00:11 +0000355 fdt32_t tmp = cpu_to_fdt32(val);
356 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
Kumar Gala7e64cf82007-11-03 19:46:28 -0500357}
358
Kumar Gala7590a192007-11-21 13:30:15 -0600359void do_fixup_by_prop(void *fdt,
360 const char *pname, const void *pval, int plen,
361 const char *prop, const void *val, int len,
362 int create)
363{
364 int off;
365#if defined(DEBUG)
366 int i;
Kumar Gala88f0ca22008-02-13 15:09:58 -0600367 debug("Updating property '%s' = ", prop);
Kumar Gala7590a192007-11-21 13:30:15 -0600368 for (i = 0; i < len; i++)
369 debug(" %.2x", *(u8*)(val+i));
370 debug("\n");
371#endif
372 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
373 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips6542c072013-01-16 14:00:11 +0000374 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
Kumar Gala7590a192007-11-21 13:30:15 -0600375 fdt_setprop(fdt, off, prop, val, len);
376 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
377 }
378}
379
380void do_fixup_by_prop_u32(void *fdt,
381 const char *pname, const void *pval, int plen,
382 const char *prop, u32 val, int create)
383{
Kim Phillips6542c072013-01-16 14:00:11 +0000384 fdt32_t tmp = cpu_to_fdt32(val);
385 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
Kumar Gala7590a192007-11-21 13:30:15 -0600386}
387
388void do_fixup_by_compat(void *fdt, const char *compat,
389 const char *prop, const void *val, int len, int create)
390{
391 int off = -1;
392#if defined(DEBUG)
393 int i;
Kumar Gala88f0ca22008-02-13 15:09:58 -0600394 debug("Updating property '%s' = ", prop);
Kumar Gala7590a192007-11-21 13:30:15 -0600395 for (i = 0; i < len; i++)
396 debug(" %.2x", *(u8*)(val+i));
397 debug("\n");
398#endif
Marek Behún5d6b4482022-01-20 01:04:42 +0100399 fdt_for_each_node_by_compatible(off, fdt, -1, compat)
Kim Phillips6542c072013-01-16 14:00:11 +0000400 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
Kumar Gala7590a192007-11-21 13:30:15 -0600401 fdt_setprop(fdt, off, prop, val, len);
Kumar Gala7590a192007-11-21 13:30:15 -0600402}
403
404void do_fixup_by_compat_u32(void *fdt, const char *compat,
405 const char *prop, u32 val, int create)
406{
Kim Phillips6542c072013-01-16 14:00:11 +0000407 fdt32_t tmp = cpu_to_fdt32(val);
408 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
Kumar Gala7590a192007-11-21 13:30:15 -0600409}
410
Masahiro Yamadaf6aa39e2016-11-26 11:02:10 +0900411#ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
Masahiro Yamadaa6ae8d32014-04-18 17:41:03 +0900412/*
413 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
414 */
Simon Glass0058e112014-10-23 18:58:55 -0600415static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size,
416 int n)
Masahiro Yamadaa6ae8d32014-04-18 17:41:03 +0900417{
418 int i;
Hans de Goede4c80fb02014-11-28 14:23:51 +0100419 int address_cells = fdt_address_cells(fdt, 0);
420 int size_cells = fdt_size_cells(fdt, 0);
Masahiro Yamadaa6ae8d32014-04-18 17:41:03 +0900421 char *p = buf;
422
423 for (i = 0; i < n; i++) {
Hans de Goede4c80fb02014-11-28 14:23:51 +0100424 if (address_cells == 2)
Sam Protsenko94483d22024-03-29 19:55:53 -0500425 put_unaligned_be64(address[i], p);
Masahiro Yamadaa6ae8d32014-04-18 17:41:03 +0900426 else
427 *(fdt32_t *)p = cpu_to_fdt32(address[i]);
Hans de Goede4c80fb02014-11-28 14:23:51 +0100428 p += 4 * address_cells;
Masahiro Yamadaa6ae8d32014-04-18 17:41:03 +0900429
Hans de Goede4c80fb02014-11-28 14:23:51 +0100430 if (size_cells == 2)
Sam Protsenko94483d22024-03-29 19:55:53 -0500431 put_unaligned_be64(size[i], p);
Masahiro Yamadaa6ae8d32014-04-18 17:41:03 +0900432 else
433 *(fdt32_t *)p = cpu_to_fdt32(size[i]);
Hans de Goede4c80fb02014-11-28 14:23:51 +0100434 p += 4 * size_cells;
Masahiro Yamadaa6ae8d32014-04-18 17:41:03 +0900435 }
436
437 return p - (char *)buf;
438}
439
Ramon Fried9cab1832018-08-14 00:35:42 +0300440#if CONFIG_NR_DRAM_BANKS > 4
441#define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
442#else
Kim Phillips6542c072013-01-16 14:00:11 +0000443#define MEMORY_BANKS_MAX 4
Ramon Fried9cab1832018-08-14 00:35:42 +0300444#endif
Michal Simek96283732021-08-10 09:21:54 +0200445
446/**
447 * fdt_fixup_memory_banks - Update DT memory node
448 * @blob: Pointer to DT blob
449 * @start: Pointer to memory start addresses array
450 * @size: Pointer to memory sizes array
451 * @banks: Number of memory banks
452 *
453 * Return: 0 on success, negative value on failure
454 *
455 * Based on the passed number of banks and arrays, the function is able to
456 * update existing DT memory nodes to match run time detected/changed memory
457 * configuration. Implementation is handling one specific case with only one
458 * memory node where multiple tuples could be added/updated.
459 * The case where multiple memory nodes with a single tuple (base, size) are
460 * used, this function is only updating the first memory node without removing
461 * others.
462 */
John Rigbyb4ae9422010-10-13 13:57:33 -0600463int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
464{
465 int err, nodeoffset;
Thierry Reding74af8a32018-01-30 11:34:17 +0100466 int len, i;
Kim Phillips6542c072013-01-16 14:00:11 +0000467 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
Kumar Gala0db72ed2007-11-26 14:57:45 -0600468
Kim Phillips6542c072013-01-16 14:00:11 +0000469 if (banks > MEMORY_BANKS_MAX) {
470 printf("%s: num banks %d exceeds hardcoded limit %d."
471 " Recompile with higher MEMORY_BANKS_MAX?\n",
472 __FUNCTION__, banks, MEMORY_BANKS_MAX);
473 return -1;
474 }
475
Kumar Gala0db72ed2007-11-26 14:57:45 -0600476 err = fdt_check_header(blob);
477 if (err < 0) {
478 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
479 return err;
480 }
481
Masahiro Yamadac0207282014-04-18 17:40:58 +0900482 /* find or create "/memory" node. */
483 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
484 if (nodeoffset < 0)
Miao Yan0904eb22013-11-28 17:51:39 +0800485 return nodeoffset;
Masahiro Yamadac0207282014-04-18 17:40:58 +0900486
Kumar Gala0db72ed2007-11-26 14:57:45 -0600487 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
488 sizeof("memory"));
489 if (err < 0) {
490 printf("WARNING: could not set %s %s.\n", "device_type",
491 fdt_strerror(err));
492 return err;
493 }
494
Thierry Reding9eb0e7e2018-02-15 19:05:59 +0100495 for (i = 0; i < banks; i++) {
496 if (start[i] == 0 && size[i] == 0)
497 break;
498 }
499
500 banks = i;
501
Andre Przywara3d2d4412015-06-21 00:29:54 +0100502 if (!banks)
503 return 0;
504
Masahiro Yamadaa6ae8d32014-04-18 17:41:03 +0900505 len = fdt_pack_reg(blob, tmp, start, size, banks);
Kumar Gala0db72ed2007-11-26 14:57:45 -0600506
507 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
508 if (err < 0) {
509 printf("WARNING: could not set %s %s.\n",
510 "reg", fdt_strerror(err));
511 return err;
512 }
513 return 0;
514}
Igor Opaniuk80b95782019-12-03 14:04:46 +0200515
516int fdt_set_usable_memory(void *blob, u64 start[], u64 size[], int areas)
517{
518 int err, nodeoffset;
519 int len;
520 u8 tmp[8 * 16]; /* Up to 64-bit address + 64-bit size */
521
522 if (areas > 8) {
523 printf("%s: num areas %d exceeds hardcoded limit %d\n",
524 __func__, areas, 8);
525 return -1;
526 }
527
528 err = fdt_check_header(blob);
529 if (err < 0) {
530 printf("%s: %s\n", __func__, fdt_strerror(err));
531 return err;
532 }
533
534 /* find or create "/memory" node. */
535 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
536 if (nodeoffset < 0)
537 return nodeoffset;
538
539 len = fdt_pack_reg(blob, tmp, start, size, areas);
540
541 err = fdt_setprop(blob, nodeoffset, "linux,usable-memory", tmp, len);
542 if (err < 0) {
543 printf("WARNING: could not set %s %s.\n",
544 "reg", fdt_strerror(err));
545 return err;
546 }
547
548 return 0;
549}
Masahiro Yamadaf6aa39e2016-11-26 11:02:10 +0900550#endif
Kumar Gala0db72ed2007-11-26 14:57:45 -0600551
John Rigbyb4ae9422010-10-13 13:57:33 -0600552int fdt_fixup_memory(void *blob, u64 start, u64 size)
553{
554 return fdt_fixup_memory_banks(blob, &start, &size, 1);
555}
556
Kumar Galafabda922008-08-19 15:41:18 -0500557void fdt_fixup_ethernet(void *fdt)
Kumar Gala22699102007-11-21 11:11:03 -0600558{
Prabhakar Kushwaha2dec06f2017-11-23 16:51:32 +0530559 int i = 0, j, prop;
Bin Mengbfb93cc2015-11-03 04:24:41 -0800560 char *tmp, *end;
Stephen Warren7c15c772013-05-27 18:01:19 +0000561 char mac[16];
Kumar Gala22699102007-11-21 11:11:03 -0600562 const char *path;
oliver@schinagl.nl496904b2016-11-25 16:30:19 +0100563 unsigned char mac_addr[ARP_HLEN];
Bin Mengbfb93cc2015-11-03 04:24:41 -0800564 int offset;
Prabhakar Kushwaha2dec06f2017-11-23 16:51:32 +0530565#ifdef FDT_SEQ_MACADDR_FROM_ENV
566 int nodeoff;
567 const struct fdt_property *fdt_prop;
568#endif
Kumar Gala22699102007-11-21 11:11:03 -0600569
Lev Iserovichcde77612016-01-07 18:04:16 -0500570 if (fdt_path_offset(fdt, "/aliases") < 0)
Kumar Galafabda922008-08-19 15:41:18 -0500571 return;
572
Lev Iserovichcde77612016-01-07 18:04:16 -0500573 /* Cycle through all aliases */
574 for (prop = 0; ; prop++) {
Bin Mengbfb93cc2015-11-03 04:24:41 -0800575 const char *name;
Dan Murphy0b9bf272013-10-02 14:00:15 -0500576
Lev Iserovichcde77612016-01-07 18:04:16 -0500577 /* FDT might have been edited, recompute the offset */
578 offset = fdt_first_property_offset(fdt,
579 fdt_path_offset(fdt, "/aliases"));
580 /* Select property number 'prop' */
Prabhakar Kushwaha2dec06f2017-11-23 16:51:32 +0530581 for (j = 0; j < prop; j++)
Lev Iserovichcde77612016-01-07 18:04:16 -0500582 offset = fdt_next_property_offset(fdt, offset);
583
584 if (offset < 0)
585 break;
586
Bin Mengbfb93cc2015-11-03 04:24:41 -0800587 path = fdt_getprop_by_offset(fdt, offset, &name, NULL);
Tuomas Tynkkynena7042f52017-03-20 10:04:55 +0200588 if (!strncmp(name, "ethernet", 8)) {
589 /* Treat plain "ethernet" same as "ethernet0". */
Prabhakar Kushwaha2dec06f2017-11-23 16:51:32 +0530590 if (!strcmp(name, "ethernet")
591#ifdef FDT_SEQ_MACADDR_FROM_ENV
592 || !strcmp(name, "ethernet0")
593#endif
594 )
Tuomas Tynkkynena7042f52017-03-20 10:04:55 +0200595 i = 0;
Prabhakar Kushwaha2dec06f2017-11-23 16:51:32 +0530596#ifndef FDT_SEQ_MACADDR_FROM_ENV
Tuomas Tynkkynena7042f52017-03-20 10:04:55 +0200597 else
598 i = trailing_strtol(name);
Prabhakar Kushwaha2dec06f2017-11-23 16:51:32 +0530599#endif
Bin Mengbfb93cc2015-11-03 04:24:41 -0800600 if (i != -1) {
601 if (i == 0)
602 strcpy(mac, "ethaddr");
603 else
604 sprintf(mac, "eth%daddr", i);
605 } else {
606 continue;
607 }
Prabhakar Kushwaha2dec06f2017-11-23 16:51:32 +0530608#ifdef FDT_SEQ_MACADDR_FROM_ENV
609 nodeoff = fdt_path_offset(fdt, path);
610 fdt_prop = fdt_get_property(fdt, nodeoff, "status",
611 NULL);
612 if (fdt_prop && !strcmp(fdt_prop->data, "disabled"))
613 continue;
614 i++;
615#endif
Simon Glass64b723f2017-08-03 12:22:12 -0600616 tmp = env_get(mac);
Bin Mengbfb93cc2015-11-03 04:24:41 -0800617 if (!tmp)
618 continue;
Kumar Galafabda922008-08-19 15:41:18 -0500619
Bin Mengbfb93cc2015-11-03 04:24:41 -0800620 for (j = 0; j < 6; j++) {
621 mac_addr[j] = tmp ?
Simon Glass3ff49ec2021-07-24 09:03:29 -0600622 hextoul(tmp, &end) : 0;
Bin Mengbfb93cc2015-11-03 04:24:41 -0800623 if (tmp)
624 tmp = (*end) ? end + 1 : end;
625 }
Kumar Galafabda922008-08-19 15:41:18 -0500626
Bin Mengbfb93cc2015-11-03 04:24:41 -0800627 do_fixup_by_path(fdt, path, "mac-address",
628 &mac_addr, 6, 0);
629 do_fixup_by_path(fdt, path, "local-mac-address",
630 &mac_addr, 6, 1);
631 }
Kumar Gala22699102007-11-21 11:11:03 -0600632 }
633}
Anton Vorontsov07e60912008-03-14 23:20:18 +0300634
Philipp Tomsich1b1b4e42018-02-02 12:01:44 +0100635int fdt_record_loadable(void *blob, u32 index, const char *name,
636 uintptr_t load_addr, u32 size, uintptr_t entry_point,
Michal Simek0e4f43d2021-05-27 11:40:09 +0200637 const char *type, const char *os, const char *arch)
Philipp Tomsich1b1b4e42018-02-02 12:01:44 +0100638{
639 int err, node;
640
641 err = fdt_check_header(blob);
642 if (err < 0) {
643 printf("%s: %s\n", __func__, fdt_strerror(err));
644 return err;
645 }
646
647 /* find or create "/fit-images" node */
648 node = fdt_find_or_add_subnode(blob, 0, "fit-images");
649 if (node < 0)
650 return node;
651
652 /* find or create "/fit-images/<name>" node */
653 node = fdt_find_or_add_subnode(blob, node, name);
654 if (node < 0)
655 return node;
656
Michal Simekd31b40f2020-09-03 12:44:51 +0200657 fdt_setprop_u64(blob, node, "load", load_addr);
Philipp Tomsich1b1b4e42018-02-02 12:01:44 +0100658 if (entry_point != -1)
Michal Simekd31b40f2020-09-03 12:44:51 +0200659 fdt_setprop_u64(blob, node, "entry", entry_point);
Philipp Tomsich1b1b4e42018-02-02 12:01:44 +0100660 fdt_setprop_u32(blob, node, "size", size);
661 if (type)
662 fdt_setprop_string(blob, node, "type", type);
663 if (os)
664 fdt_setprop_string(blob, node, "os", os);
Michal Simek0e4f43d2021-05-27 11:40:09 +0200665 if (arch)
666 fdt_setprop_string(blob, node, "arch", arch);
Philipp Tomsich1b1b4e42018-02-02 12:01:44 +0100667
668 return node;
669}
670
Hannes Schmelzerd3dbac82016-09-20 18:10:43 +0200671int fdt_shrink_to_minimum(void *blob, uint extrasize)
Kumar Galaf2f58c52008-08-15 08:24:42 -0500672{
673 int i;
674 uint64_t addr, size;
675 int total, ret;
676 uint actualsize;
Simon Goldschmidt5d5a0c02019-05-03 21:19:03 +0200677 int fdt_memrsv = 0;
Kumar Galaf2f58c52008-08-15 08:24:42 -0500678
679 if (!blob)
680 return 0;
681
682 total = fdt_num_mem_rsv(blob);
683 for (i = 0; i < total; i++) {
684 fdt_get_mem_rsv(blob, i, &addr, &size);
Simon Glassfc953242011-09-17 06:48:58 +0000685 if (addr == (uintptr_t)blob) {
Kumar Galaf2f58c52008-08-15 08:24:42 -0500686 fdt_del_mem_rsv(blob, i);
Simon Goldschmidt5d5a0c02019-05-03 21:19:03 +0200687 fdt_memrsv = 1;
Kumar Galaf2f58c52008-08-15 08:24:42 -0500688 break;
689 }
690 }
691
Peter Korsgaard9c7b7052008-10-28 08:26:52 +0100692 /*
693 * Calculate the actual size of the fdt
Feng Wangba31fb62010-08-03 16:22:43 +0200694 * plus the size needed for 5 fdt_add_mem_rsv, one
695 * for the fdt itself and 4 for a possible initrd
696 * ((initrd-start + initrd-end) * 2 (name & value))
Peter Korsgaard9c7b7052008-10-28 08:26:52 +0100697 */
Kumar Galaf2f58c52008-08-15 08:24:42 -0500698 actualsize = fdt_off_dt_strings(blob) +
Feng Wangba31fb62010-08-03 16:22:43 +0200699 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
Kumar Galaf2f58c52008-08-15 08:24:42 -0500700
Hannes Schmelzerd3dbac82016-09-20 18:10:43 +0200701 actualsize += extrasize;
Kumar Galaf2f58c52008-08-15 08:24:42 -0500702 /* Make it so the fdt ends on a page boundary */
Simon Glassfc953242011-09-17 06:48:58 +0000703 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
704 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
Kumar Galaf2f58c52008-08-15 08:24:42 -0500705
706 /* Change the fdt header to reflect the correct size */
707 fdt_set_totalsize(blob, actualsize);
708
Simon Goldschmidt5d5a0c02019-05-03 21:19:03 +0200709 if (fdt_memrsv) {
710 /* Add the new reservation */
711 ret = fdt_add_mem_rsv(blob, map_to_sysmem(blob), actualsize);
712 if (ret < 0)
713 return ret;
714 }
Kumar Galaf2f58c52008-08-15 08:24:42 -0500715
716 return actualsize;
717}
Kumar Galae0475cd2008-10-22 23:33:56 -0500718
Marek Behúnac4d9ff2021-11-26 14:57:15 +0100719/**
720 * fdt_delete_disabled_nodes: Delete all nodes with status == "disabled"
721 *
722 * @blob: ptr to device tree
723 */
724int fdt_delete_disabled_nodes(void *blob)
725{
726 while (1) {
727 int ret, offset;
728
729 offset = fdt_node_offset_by_prop_value(blob, -1, "status",
730 "disabled", 9);
731 if (offset < 0)
732 break;
733
734 ret = fdt_del_node(blob, offset);
735 if (ret < 0)
736 return ret;
737 }
738
739 return 0;
740}
741
Kumar Galae0475cd2008-10-22 23:33:56 -0500742#ifdef CONFIG_PCI
Tom Rini56af6592022-11-16 13:10:33 -0500743#define CFG_SYS_PCI_NR_INBOUND_WIN 4
Kumar Galae0475cd2008-10-22 23:33:56 -0500744
745#define FDT_PCI_PREFETCH (0x40000000)
746#define FDT_PCI_MEM32 (0x02000000)
747#define FDT_PCI_IO (0x01000000)
748#define FDT_PCI_MEM64 (0x03000000)
749
750int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
751
752 int addrcell, sizecell, len, r;
753 u32 *dma_range;
754 /* sized based on pci addr cells, size-cells, & address-cells */
Tom Rini56af6592022-11-16 13:10:33 -0500755 u32 dma_ranges[(3 + 2 + 2) * CFG_SYS_PCI_NR_INBOUND_WIN];
Kumar Galae0475cd2008-10-22 23:33:56 -0500756
757 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
758 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
759
760 dma_range = &dma_ranges[0];
761 for (r = 0; r < hose->region_count; r++) {
762 u64 bus_start, phys_start, size;
763
Kumar Galaefa1f1d2009-02-06 09:49:31 -0600764 /* skip if !PCI_REGION_SYS_MEMORY */
765 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
Kumar Galae0475cd2008-10-22 23:33:56 -0500766 continue;
767
768 bus_start = (u64)hose->regions[r].bus_start;
769 phys_start = (u64)hose->regions[r].phys_start;
770 size = (u64)hose->regions[r].size;
771
772 dma_range[0] = 0;
Kumar Galabaf41892009-08-05 09:03:54 -0500773 if (size >= 0x100000000ull)
Marek Vasut22203f52019-07-09 02:49:29 +0200774 dma_range[0] |= cpu_to_fdt32(FDT_PCI_MEM64);
Kumar Galae0475cd2008-10-22 23:33:56 -0500775 else
Marek Vasut22203f52019-07-09 02:49:29 +0200776 dma_range[0] |= cpu_to_fdt32(FDT_PCI_MEM32);
Kumar Galae0475cd2008-10-22 23:33:56 -0500777 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
Marek Vasut22203f52019-07-09 02:49:29 +0200778 dma_range[0] |= cpu_to_fdt32(FDT_PCI_PREFETCH);
Kumar Galae0475cd2008-10-22 23:33:56 -0500779#ifdef CONFIG_SYS_PCI_64BIT
Marek Vasut22203f52019-07-09 02:49:29 +0200780 dma_range[1] = cpu_to_fdt32(bus_start >> 32);
Kumar Galae0475cd2008-10-22 23:33:56 -0500781#else
782 dma_range[1] = 0;
783#endif
Marek Vasut22203f52019-07-09 02:49:29 +0200784 dma_range[2] = cpu_to_fdt32(bus_start & 0xffffffff);
Kumar Galae0475cd2008-10-22 23:33:56 -0500785
786 if (addrcell == 2) {
Marek Vasut22203f52019-07-09 02:49:29 +0200787 dma_range[3] = cpu_to_fdt32(phys_start >> 32);
788 dma_range[4] = cpu_to_fdt32(phys_start & 0xffffffff);
Kumar Galae0475cd2008-10-22 23:33:56 -0500789 } else {
Marek Vasut22203f52019-07-09 02:49:29 +0200790 dma_range[3] = cpu_to_fdt32(phys_start & 0xffffffff);
Kumar Galae0475cd2008-10-22 23:33:56 -0500791 }
792
793 if (sizecell == 2) {
Marek Vasut22203f52019-07-09 02:49:29 +0200794 dma_range[3 + addrcell + 0] =
795 cpu_to_fdt32(size >> 32);
796 dma_range[3 + addrcell + 1] =
797 cpu_to_fdt32(size & 0xffffffff);
Kumar Galae0475cd2008-10-22 23:33:56 -0500798 } else {
Marek Vasut22203f52019-07-09 02:49:29 +0200799 dma_range[3 + addrcell + 0] =
800 cpu_to_fdt32(size & 0xffffffff);
Kumar Galae0475cd2008-10-22 23:33:56 -0500801 }
802
803 dma_range += (3 + addrcell + sizecell);
804 }
805
806 len = dma_range - &dma_ranges[0];
807 if (len)
808 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
809
810 return 0;
811}
812#endif
Stefan Roesea0f10c92009-10-21 11:59:52 +0200813
Matthew McClintockacda3a42010-10-13 13:39:26 +0200814int fdt_increase_size(void *fdt, int add_len)
815{
816 int newlen;
817
818 newlen = fdt_totalsize(fdt) + add_len;
819
820 /* Open in place with a new len */
821 return fdt_open_into(fdt, fdt, newlen);
822}
823
Anatolij Gustschin6c44c382010-03-16 17:10:05 +0100824#ifdef CONFIG_FDT_FIXUP_PARTITIONS
825#include <jffs2/load_kernel.h>
826#include <mtd_node.h>
827
Michal Simekc2ed0072018-07-31 14:31:04 +0200828static int fdt_del_subnodes(const void *blob, int parent_offset)
Anatolij Gustschin6c44c382010-03-16 17:10:05 +0100829{
830 int off, ndepth;
831 int ret;
832
833 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
834 (off >= 0) && (ndepth > 0);
835 off = fdt_next_node(blob, off, &ndepth)) {
836 if (ndepth == 1) {
837 debug("delete %s: offset: %x\n",
838 fdt_get_name(blob, off, 0), off);
839 ret = fdt_del_node((void *)blob, off);
840 if (ret < 0) {
841 printf("Can't delete node: %s\n",
842 fdt_strerror(ret));
843 return ret;
844 } else {
845 ndepth = 0;
846 off = parent_offset;
847 }
848 }
849 }
850 return 0;
851}
852
Michal Simekc2ed0072018-07-31 14:31:04 +0200853static int fdt_del_partitions(void *blob, int parent_offset)
Anatolij Gustschin6c44c382010-03-16 17:10:05 +0100854{
855 const void *prop;
856 int ndepth = 0;
857 int off;
858 int ret;
859
860 off = fdt_next_node(blob, parent_offset, &ndepth);
861 if (off > 0 && ndepth == 1) {
862 prop = fdt_getprop(blob, off, "label", NULL);
863 if (prop == NULL) {
864 /*
865 * Could not find label property, nand {}; node?
866 * Check subnode, delete partitions there if any.
867 */
868 return fdt_del_partitions(blob, off);
869 } else {
870 ret = fdt_del_subnodes(blob, parent_offset);
871 if (ret < 0) {
872 printf("Can't remove subnodes: %s\n",
873 fdt_strerror(ret));
874 return ret;
875 }
876 }
877 }
878 return 0;
879}
880
Masahiro Yamada65669602020-07-15 19:35:47 +0900881static int fdt_node_set_part_info(void *blob, int parent_offset,
882 struct mtd_device *dev)
Anatolij Gustschin6c44c382010-03-16 17:10:05 +0100883{
884 struct list_head *pentry;
885 struct part_info *part;
Anatolij Gustschin6c44c382010-03-16 17:10:05 +0100886 int off, ndepth = 0;
887 int part_num, ret;
Stefan Mavrodiev51b0c032019-04-24 08:31:54 +0300888 int sizecell;
Anatolij Gustschin6c44c382010-03-16 17:10:05 +0100889 char buf[64];
890
891 ret = fdt_del_partitions(blob, parent_offset);
892 if (ret < 0)
893 return ret;
894
895 /*
Stefan Mavrodiev51b0c032019-04-24 08:31:54 +0300896 * Check if size/address is 1 or 2 cells.
897 * We assume #address-cells and #size-cells have same value.
898 */
899 sizecell = fdt_getprop_u32_default_node(blob, parent_offset,
900 0, "#size-cells", 1);
901
902 /*
Anatolij Gustschin6c44c382010-03-16 17:10:05 +0100903 * Check if it is nand {}; subnode, adjust
904 * the offset in this case
905 */
906 off = fdt_next_node(blob, parent_offset, &ndepth);
907 if (off > 0 && ndepth == 1)
908 parent_offset = off;
909
910 part_num = 0;
911 list_for_each_prev(pentry, &dev->parts) {
912 int newoff;
913
914 part = list_entry(pentry, struct part_info, link);
915
Scott Woodefe7f302013-10-15 17:41:27 -0500916 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
Anatolij Gustschin6c44c382010-03-16 17:10:05 +0100917 part_num, part->name, part->size,
918 part->offset, part->mask_flags);
919
Scott Woodefe7f302013-10-15 17:41:27 -0500920 sprintf(buf, "partition@%llx", part->offset);
Anatolij Gustschin6c44c382010-03-16 17:10:05 +0100921add_sub:
922 ret = fdt_add_subnode(blob, parent_offset, buf);
923 if (ret == -FDT_ERR_NOSPACE) {
924 ret = fdt_increase_size(blob, 512);
925 if (!ret)
926 goto add_sub;
927 else
928 goto err_size;
929 } else if (ret < 0) {
930 printf("Can't add partition node: %s\n",
931 fdt_strerror(ret));
932 return ret;
933 }
934 newoff = ret;
935
936 /* Check MTD_WRITEABLE_CMD flag */
937 if (part->mask_flags & 1) {
938add_ro:
939 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
940 if (ret == -FDT_ERR_NOSPACE) {
941 ret = fdt_increase_size(blob, 512);
942 if (!ret)
943 goto add_ro;
944 else
945 goto err_size;
946 } else if (ret < 0)
947 goto err_prop;
948 }
949
Anatolij Gustschin6c44c382010-03-16 17:10:05 +0100950add_reg:
Stefan Mavrodiev51b0c032019-04-24 08:31:54 +0300951 if (sizecell == 2) {
952 ret = fdt_setprop_u64(blob, newoff,
953 "reg", part->offset);
954 if (!ret)
955 ret = fdt_appendprop_u64(blob, newoff,
956 "reg", part->size);
957 } else {
958 ret = fdt_setprop_u32(blob, newoff,
959 "reg", part->offset);
960 if (!ret)
961 ret = fdt_appendprop_u32(blob, newoff,
962 "reg", part->size);
963 }
964
Anatolij Gustschin6c44c382010-03-16 17:10:05 +0100965 if (ret == -FDT_ERR_NOSPACE) {
966 ret = fdt_increase_size(blob, 512);
967 if (!ret)
968 goto add_reg;
969 else
970 goto err_size;
971 } else if (ret < 0)
972 goto err_prop;
973
974add_label:
975 ret = fdt_setprop_string(blob, newoff, "label", part->name);
976 if (ret == -FDT_ERR_NOSPACE) {
977 ret = fdt_increase_size(blob, 512);
978 if (!ret)
979 goto add_label;
980 else
981 goto err_size;
982 } else if (ret < 0)
983 goto err_prop;
984
985 part_num++;
986 }
987 return 0;
988err_size:
989 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
990 return ret;
991err_prop:
992 printf("Can't add property: %s\n", fdt_strerror(ret));
993 return ret;
994}
995
996/*
997 * Update partitions in nor/nand nodes using info from
998 * mtdparts environment variable. The nodes to update are
999 * specified by node_info structure which contains mtd device
1000 * type and compatible string: E. g. the board code in
1001 * ft_board_setup() could use:
1002 *
1003 * struct node_info nodes[] = {
1004 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
1005 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
1006 * };
1007 *
1008 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
1009 */
Masahiro Yamadaf3d40142018-07-19 16:28:22 +09001010void fdt_fixup_mtdparts(void *blob, const struct node_info *node_info,
1011 int node_info_size)
Anatolij Gustschin6c44c382010-03-16 17:10:05 +01001012{
Anatolij Gustschin6c44c382010-03-16 17:10:05 +01001013 struct mtd_device *dev;
Anatolij Gustschin6c44c382010-03-16 17:10:05 +01001014 int i, idx;
Matthias Schiffer01f078f2022-02-03 15:14:47 +01001015 int noff, parts;
Masahiro Yamada030348f2020-07-17 10:46:18 +09001016 bool inited = false;
Anatolij Gustschin6c44c382010-03-16 17:10:05 +01001017
1018 for (i = 0; i < node_info_size; i++) {
1019 idx = 0;
Masahiro Yamada21644292020-07-17 10:46:19 +09001020
Marek Behún5d6b4482022-01-20 01:04:42 +01001021 fdt_for_each_node_by_compatible(noff, blob, -1,
1022 node_info[i].compat) {
Masahiro Yamada21644292020-07-17 10:46:19 +09001023 const char *prop;
1024
1025 prop = fdt_getprop(blob, noff, "status", NULL);
1026 if (prop && !strcmp(prop, "disabled"))
1027 continue;
1028
Anatolij Gustschin6c44c382010-03-16 17:10:05 +01001029 debug("%s: %s, mtd dev type %d\n",
1030 fdt_get_name(blob, noff, 0),
Masahiro Yamadaf3d40142018-07-19 16:28:22 +09001031 node_info[i].compat, node_info[i].type);
Masahiro Yamada030348f2020-07-17 10:46:18 +09001032
1033 if (!inited) {
1034 if (mtdparts_init() != 0)
1035 return;
1036 inited = true;
1037 }
1038
Masahiro Yamadaf3d40142018-07-19 16:28:22 +09001039 dev = device_find(node_info[i].type, idx++);
Anatolij Gustschin6c44c382010-03-16 17:10:05 +01001040 if (dev) {
Matthias Schiffer01f078f2022-02-03 15:14:47 +01001041 parts = fdt_subnode_offset(blob, noff,
1042 "partitions");
1043 if (parts < 0)
1044 parts = noff;
1045
1046 if (fdt_node_set_part_info(blob, parts, dev))
Anatolij Gustschin6c44c382010-03-16 17:10:05 +01001047 return; /* return on error */
1048 }
Anatolij Gustschin6c44c382010-03-16 17:10:05 +01001049 }
1050 }
1051}
1052#endif
Kumar Galaf4ad4fd2010-03-30 10:19:26 -05001053
Patrick Delaunay019127b2023-06-08 17:16:38 +02001054int fdt_copy_fixed_partitions(void *blob)
1055{
1056 ofnode node, subnode;
1057 int off, suboff, res;
1058 char path[256];
1059 int address_cells, size_cells;
1060 u8 i, j, child_count;
1061
1062 node = ofnode_by_compatible(ofnode_null(), "fixed-partitions");
1063 while (ofnode_valid(node)) {
1064 /* copy the U-Boot fixed partition */
1065 address_cells = ofnode_read_simple_addr_cells(node);
1066 size_cells = ofnode_read_simple_size_cells(node);
1067
1068 res = ofnode_get_path(ofnode_get_parent(node), path, sizeof(path));
1069 if (res)
1070 return res;
1071
1072 off = fdt_path_offset(blob, path);
1073 if (off < 0)
1074 return -ENODEV;
1075
1076 off = fdt_find_or_add_subnode(blob, off, "partitions");
1077 res = fdt_setprop_string(blob, off, "compatible", "fixed-partitions");
1078 if (res)
1079 return res;
1080
1081 res = fdt_setprop_u32(blob, off, "#address-cells", address_cells);
1082 if (res)
1083 return res;
1084
1085 res = fdt_setprop_u32(blob, off, "#size-cells", size_cells);
1086 if (res)
1087 return res;
1088
1089 /*
1090 * parse partition in reverse order as fdt_find_or_add_subnode() only
1091 * insert the new node after the parent's properties
1092 */
1093 child_count = ofnode_get_child_count(node);
1094 for (i = child_count; i > 0 ; i--) {
1095 subnode = ofnode_first_subnode(node);
1096 if (!ofnode_valid(subnode))
1097 break;
1098
1099 for (j = 0; (j < i - 1); j++)
1100 subnode = ofnode_next_subnode(subnode);
1101
1102 if (!ofnode_valid(subnode))
1103 break;
1104
1105 const u32 *reg;
1106 int len;
1107
1108 suboff = fdt_find_or_add_subnode(blob, off, ofnode_get_name(subnode));
1109 res = fdt_setprop_string(blob, suboff, "label",
1110 ofnode_read_string(subnode, "label"));
1111 if (res)
1112 return res;
1113
1114 reg = ofnode_get_property(subnode, "reg", &len);
1115 res = fdt_setprop(blob, suboff, "reg", reg, len);
1116 if (res)
1117 return res;
1118 }
1119
1120 /* go to next fixed-partitions node */
1121 node = ofnode_by_compatible(node, "fixed-partitions");
1122 }
1123
1124 return 0;
1125}
1126
Kumar Galaf4ad4fd2010-03-30 10:19:26 -05001127void fdt_del_node_and_alias(void *blob, const char *alias)
1128{
1129 int off = fdt_path_offset(blob, alias);
1130
1131 if (off < 0)
1132 return;
1133
1134 fdt_del_node(blob, off);
1135
1136 off = fdt_path_offset(blob, "/aliases");
1137 fdt_delprop(blob, off, alias);
1138}
Kumar Galab87e7932010-06-16 14:27:38 -05001139
Kumar Galab87e7932010-06-16 14:27:38 -05001140/* Max address size we deal with */
1141#define OF_MAX_ADDR_CELLS 4
Dario Binacchif8fc7032021-05-01 17:05:26 +02001142#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
1143 (ns) > 0)
Kumar Galab87e7932010-06-16 14:27:38 -05001144
1145/* Debug utility */
1146#ifdef DEBUG
Kim Phillips6542c072013-01-16 14:00:11 +00001147static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
Kumar Galab87e7932010-06-16 14:27:38 -05001148{
1149 printf("%s", s);
1150 while(na--)
1151 printf(" %08x", *(addr++));
1152 printf("\n");
1153}
1154#else
Kim Phillips6542c072013-01-16 14:00:11 +00001155static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
Kumar Galab87e7932010-06-16 14:27:38 -05001156#endif
1157
Paul Burtondbef2f02016-05-17 07:43:24 +01001158/**
1159 * struct of_bus - Callbacks for bus specific translators
Paul Burton03f08c52016-05-17 07:43:25 +01001160 * @name: A string used to identify this bus in debug output.
1161 * @addresses: The name of the DT property from which addresses are
1162 * to be read, typically "reg".
Paul Burtondbef2f02016-05-17 07:43:24 +01001163 * @match: Return non-zero if the node whose parent is at
1164 * parentoffset in the FDT blob corresponds to a bus
1165 * of this type, otherwise return zero. If NULL a match
1166 * is assumed.
Paul Burton03f08c52016-05-17 07:43:25 +01001167 * @count_cells:Count how many cells (be32 values) a node whose parent
1168 * is at parentoffset in the FDT blob will require to
1169 * represent its address (written to *addrc) & size
1170 * (written to *sizec).
1171 * @map: Map the address addr from the address space of this
1172 * bus to that of its parent, making use of the ranges
1173 * read from DT to an array at range. na and ns are the
1174 * number of cells (be32 values) used to hold and address
1175 * or size, respectively, for this bus. pna is the number
1176 * of cells used to hold an address for the parent bus.
1177 * Returns the address in the address space of the parent
1178 * bus.
1179 * @translate: Update the value of the address cells at addr within an
1180 * FDT by adding offset to it. na specifies the number of
1181 * cells used to hold the address being translated. Returns
1182 * zero on success, non-zero on error.
Paul Burtondbef2f02016-05-17 07:43:24 +01001183 *
1184 * Each bus type will include a struct of_bus in the of_busses array,
1185 * providing implementations of some or all of the functions used to
1186 * match the bus & handle address translation for its children.
1187 */
Kumar Galab87e7932010-06-16 14:27:38 -05001188struct of_bus {
1189 const char *name;
1190 const char *addresses;
Stephen Warrenc99581b2016-08-05 09:47:50 -06001191 int (*match)(const void *blob, int parentoffset);
1192 void (*count_cells)(const void *blob, int parentoffset,
Kumar Galab87e7932010-06-16 14:27:38 -05001193 int *addrc, int *sizec);
Kim Phillips6542c072013-01-16 14:00:11 +00001194 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
Kumar Galab87e7932010-06-16 14:27:38 -05001195 int na, int ns, int pna);
Kim Phillips6542c072013-01-16 14:00:11 +00001196 int (*translate)(fdt32_t *addr, u64 offset, int na);
Kumar Galab87e7932010-06-16 14:27:38 -05001197};
1198
1199/* Default translator (generic bus) */
Simon Glassbb7c01e2017-05-18 20:09:26 -06001200void fdt_support_default_count_cells(const void *blob, int parentoffset,
Kumar Galab87e7932010-06-16 14:27:38 -05001201 int *addrc, int *sizec)
1202{
Kim Phillips6542c072013-01-16 14:00:11 +00001203 const fdt32_t *prop;
Scott Wood99899712010-08-12 18:37:39 -05001204
Simon Glass9fbc6322014-10-23 18:58:57 -06001205 if (addrc)
1206 *addrc = fdt_address_cells(blob, parentoffset);
Scott Wood99899712010-08-12 18:37:39 -05001207
1208 if (sizec) {
1209 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
1210 if (prop)
Kim Phillips6542c072013-01-16 14:00:11 +00001211 *sizec = be32_to_cpup(prop);
Scott Wood99899712010-08-12 18:37:39 -05001212 else
1213 *sizec = 1;
1214 }
Kumar Galab87e7932010-06-16 14:27:38 -05001215}
1216
Kim Phillips6542c072013-01-16 14:00:11 +00001217static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
Kumar Galab87e7932010-06-16 14:27:38 -05001218 int na, int ns, int pna)
1219{
1220 u64 cp, s, da;
1221
Simon Glassbb7c01e2017-05-18 20:09:26 -06001222 cp = fdt_read_number(range, na);
1223 s = fdt_read_number(range + na + pna, ns);
1224 da = fdt_read_number(addr, na);
Kumar Galab87e7932010-06-16 14:27:38 -05001225
Sekhar Noria98ba7f2018-12-06 15:20:47 +05301226 debug("OF: default map, cp=%llx, s=%llx, da=%llx\n", cp, s, da);
Kumar Galab87e7932010-06-16 14:27:38 -05001227
1228 if (da < cp || da >= (cp + s))
1229 return OF_BAD_ADDR;
1230 return da - cp;
1231}
1232
Kim Phillips6542c072013-01-16 14:00:11 +00001233static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
Kumar Galab87e7932010-06-16 14:27:38 -05001234{
Simon Glassbb7c01e2017-05-18 20:09:26 -06001235 u64 a = fdt_read_number(addr, na);
Kumar Galab87e7932010-06-16 14:27:38 -05001236 memset(addr, 0, na * 4);
1237 a += offset;
1238 if (na > 1)
Kim Phillips6542c072013-01-16 14:00:11 +00001239 addr[na - 2] = cpu_to_fdt32(a >> 32);
1240 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
Kumar Galab87e7932010-06-16 14:27:38 -05001241
1242 return 0;
1243}
1244
Paul Burtondbef2f02016-05-17 07:43:24 +01001245#ifdef CONFIG_OF_ISA_BUS
1246
1247/* ISA bus translator */
Stephen Warrenc99581b2016-08-05 09:47:50 -06001248static int of_bus_isa_match(const void *blob, int parentoffset)
Paul Burtondbef2f02016-05-17 07:43:24 +01001249{
1250 const char *name;
1251
1252 name = fdt_get_name(blob, parentoffset, NULL);
1253 if (!name)
1254 return 0;
1255
1256 return !strcmp(name, "isa");
1257}
1258
Stephen Warrenc99581b2016-08-05 09:47:50 -06001259static void of_bus_isa_count_cells(const void *blob, int parentoffset,
Paul Burtondbef2f02016-05-17 07:43:24 +01001260 int *addrc, int *sizec)
1261{
1262 if (addrc)
1263 *addrc = 2;
1264 if (sizec)
1265 *sizec = 1;
1266}
1267
1268static u64 of_bus_isa_map(fdt32_t *addr, const fdt32_t *range,
1269 int na, int ns, int pna)
1270{
1271 u64 cp, s, da;
1272
1273 /* Check address type match */
1274 if ((addr[0] ^ range[0]) & cpu_to_be32(1))
1275 return OF_BAD_ADDR;
1276
Simon Glassbb7c01e2017-05-18 20:09:26 -06001277 cp = fdt_read_number(range + 1, na - 1);
1278 s = fdt_read_number(range + na + pna, ns);
1279 da = fdt_read_number(addr + 1, na - 1);
Paul Burtondbef2f02016-05-17 07:43:24 +01001280
Sekhar Noria98ba7f2018-12-06 15:20:47 +05301281 debug("OF: ISA map, cp=%llx, s=%llx, da=%llx\n", cp, s, da);
Paul Burtondbef2f02016-05-17 07:43:24 +01001282
1283 if (da < cp || da >= (cp + s))
1284 return OF_BAD_ADDR;
1285 return da - cp;
1286}
1287
1288static int of_bus_isa_translate(fdt32_t *addr, u64 offset, int na)
1289{
1290 return of_bus_default_translate(addr + 1, offset, na - 1);
1291}
1292
1293#endif /* CONFIG_OF_ISA_BUS */
1294
Kumar Galab87e7932010-06-16 14:27:38 -05001295/* Array of bus specific translators */
1296static struct of_bus of_busses[] = {
Paul Burtondbef2f02016-05-17 07:43:24 +01001297#ifdef CONFIG_OF_ISA_BUS
1298 /* ISA */
1299 {
1300 .name = "isa",
1301 .addresses = "reg",
1302 .match = of_bus_isa_match,
1303 .count_cells = of_bus_isa_count_cells,
1304 .map = of_bus_isa_map,
1305 .translate = of_bus_isa_translate,
1306 },
1307#endif /* CONFIG_OF_ISA_BUS */
Kumar Galab87e7932010-06-16 14:27:38 -05001308 /* Default */
1309 {
1310 .name = "default",
1311 .addresses = "reg",
Simon Glassbb7c01e2017-05-18 20:09:26 -06001312 .count_cells = fdt_support_default_count_cells,
Kumar Galab87e7932010-06-16 14:27:38 -05001313 .map = of_bus_default_map,
1314 .translate = of_bus_default_translate,
1315 },
1316};
1317
Stephen Warrenc99581b2016-08-05 09:47:50 -06001318static struct of_bus *of_match_bus(const void *blob, int parentoffset)
Paul Burtondbef2f02016-05-17 07:43:24 +01001319{
1320 struct of_bus *bus;
1321
1322 if (ARRAY_SIZE(of_busses) == 1)
1323 return of_busses;
1324
1325 for (bus = of_busses; bus; bus++) {
1326 if (!bus->match || bus->match(blob, parentoffset))
1327 return bus;
1328 }
1329
1330 /*
1331 * We should always have matched the default bus at least, since
1332 * it has a NULL match field. If we didn't then it somehow isn't
1333 * in the of_busses array or something equally catastrophic has
1334 * gone wrong.
1335 */
1336 assert(0);
1337 return NULL;
1338}
1339
Stephen Warrenc99581b2016-08-05 09:47:50 -06001340static int of_translate_one(const void *blob, int parent, struct of_bus *bus,
Kim Phillips6542c072013-01-16 14:00:11 +00001341 struct of_bus *pbus, fdt32_t *addr,
Kumar Galab87e7932010-06-16 14:27:38 -05001342 int na, int ns, int pna, const char *rprop)
1343{
Kim Phillips6542c072013-01-16 14:00:11 +00001344 const fdt32_t *ranges;
Kumar Galab87e7932010-06-16 14:27:38 -05001345 int rlen;
1346 int rone;
1347 u64 offset = OF_BAD_ADDR;
1348
1349 /* Normally, an absence of a "ranges" property means we are
1350 * crossing a non-translatable boundary, and thus the addresses
1351 * below the current not cannot be converted to CPU physical ones.
1352 * Unfortunately, while this is very clear in the spec, it's not
1353 * what Apple understood, and they do have things like /uni-n or
1354 * /ht nodes with no "ranges" property and a lot of perfectly
1355 * useable mapped devices below them. Thus we treat the absence of
1356 * "ranges" as equivalent to an empty "ranges" property which means
1357 * a 1:1 translation at that level. It's up to the caller not to try
1358 * to translate addresses that aren't supposed to be translated in
1359 * the first place. --BenH.
1360 */
Kim Phillips6542c072013-01-16 14:00:11 +00001361 ranges = fdt_getprop(blob, parent, rprop, &rlen);
Kumar Galab87e7932010-06-16 14:27:38 -05001362 if (ranges == NULL || rlen == 0) {
Simon Glassbb7c01e2017-05-18 20:09:26 -06001363 offset = fdt_read_number(addr, na);
Kumar Galab87e7932010-06-16 14:27:38 -05001364 memset(addr, 0, pna * 4);
1365 debug("OF: no ranges, 1:1 translation\n");
1366 goto finish;
1367 }
1368
1369 debug("OF: walking ranges...\n");
1370
1371 /* Now walk through the ranges */
1372 rlen /= 4;
1373 rone = na + pna + ns;
1374 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1375 offset = bus->map(addr, ranges, na, ns, pna);
1376 if (offset != OF_BAD_ADDR)
1377 break;
1378 }
1379 if (offset == OF_BAD_ADDR) {
1380 debug("OF: not found !\n");
1381 return 1;
1382 }
1383 memcpy(addr, ranges + na, 4 * pna);
1384
1385 finish:
1386 of_dump_addr("OF: parent translation for:", addr, pna);
Masahiro Yamadac7570a32018-08-06 20:47:40 +09001387 debug("OF: with offset: %llu\n", offset);
Kumar Galab87e7932010-06-16 14:27:38 -05001388
1389 /* Translate it into parent bus space */
1390 return pbus->translate(addr, offset, pna);
1391}
1392
1393/*
1394 * Translate an address from the device-tree into a CPU physical address,
1395 * this walks up the tree and applies the various bus mappings on the
1396 * way.
1397 *
1398 * Note: We consider that crossing any level with #size-cells == 0 to mean
1399 * that translation is impossible (that is we are not dealing with a value
1400 * that can be mapped to a cpu physical address). This is not really specified
1401 * that way, but this is traditionally the way IBM at least do things
1402 */
Stephen Warrenc99581b2016-08-05 09:47:50 -06001403static u64 __of_translate_address(const void *blob, int node_offset,
1404 const fdt32_t *in_addr, const char *rprop)
Kumar Galab87e7932010-06-16 14:27:38 -05001405{
1406 int parent;
1407 struct of_bus *bus, *pbus;
Kim Phillips6542c072013-01-16 14:00:11 +00001408 fdt32_t addr[OF_MAX_ADDR_CELLS];
Kumar Galab87e7932010-06-16 14:27:38 -05001409 int na, ns, pna, pns;
1410 u64 result = OF_BAD_ADDR;
1411
1412 debug("OF: ** translation for device %s **\n",
1413 fdt_get_name(blob, node_offset, NULL));
1414
1415 /* Get parent & match bus type */
1416 parent = fdt_parent_offset(blob, node_offset);
1417 if (parent < 0)
1418 goto bail;
Paul Burtondbef2f02016-05-17 07:43:24 +01001419 bus = of_match_bus(blob, parent);
Kumar Galab87e7932010-06-16 14:27:38 -05001420
1421 /* Cound address cells & copy address locally */
Scott Wood99899712010-08-12 18:37:39 -05001422 bus->count_cells(blob, parent, &na, &ns);
Przemyslaw Marczakf4d337c2016-01-12 15:40:44 +01001423 if (!OF_CHECK_COUNTS(na, ns)) {
Kumar Galab87e7932010-06-16 14:27:38 -05001424 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1425 fdt_get_name(blob, node_offset, NULL));
1426 goto bail;
1427 }
1428 memcpy(addr, in_addr, na * 4);
1429
1430 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1431 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1432 of_dump_addr("OF: translating address:", addr, na);
1433
1434 /* Translate */
1435 for (;;) {
1436 /* Switch to parent bus */
1437 node_offset = parent;
1438 parent = fdt_parent_offset(blob, node_offset);
1439
1440 /* If root, we have finished */
1441 if (parent < 0) {
1442 debug("OF: reached root node\n");
Simon Glassbb7c01e2017-05-18 20:09:26 -06001443 result = fdt_read_number(addr, na);
Kumar Galab87e7932010-06-16 14:27:38 -05001444 break;
1445 }
1446
1447 /* Get new parent bus and counts */
Paul Burtondbef2f02016-05-17 07:43:24 +01001448 pbus = of_match_bus(blob, parent);
Scott Wood99899712010-08-12 18:37:39 -05001449 pbus->count_cells(blob, parent, &pna, &pns);
Przemyslaw Marczakf4d337c2016-01-12 15:40:44 +01001450 if (!OF_CHECK_COUNTS(pna, pns)) {
Kumar Galab87e7932010-06-16 14:27:38 -05001451 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1452 fdt_get_name(blob, node_offset, NULL));
1453 break;
1454 }
1455
1456 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1457 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1458
1459 /* Apply bus translation */
1460 if (of_translate_one(blob, node_offset, bus, pbus,
1461 addr, na, ns, pna, rprop))
1462 break;
1463
1464 /* Complete the move up one level */
1465 na = pna;
1466 ns = pns;
1467 bus = pbus;
1468
1469 of_dump_addr("OF: one level translation:", addr, na);
1470 }
1471 bail:
1472
1473 return result;
1474}
1475
Stephen Warrenc99581b2016-08-05 09:47:50 -06001476u64 fdt_translate_address(const void *blob, int node_offset,
1477 const fdt32_t *in_addr)
Kumar Galab87e7932010-06-16 14:27:38 -05001478{
1479 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1480}
Kumar Gala800d1d12010-07-04 12:48:21 -05001481
Fabien Dessenne22236e02019-05-31 15:11:30 +02001482u64 fdt_translate_dma_address(const void *blob, int node_offset,
1483 const fdt32_t *in_addr)
1484{
1485 return __of_translate_address(blob, node_offset, in_addr, "dma-ranges");
1486}
1487
Nicolas Saenz Julienne50d2fa42021-01-12 13:55:22 +01001488int fdt_get_dma_range(const void *blob, int node, phys_addr_t *cpu,
1489 dma_addr_t *bus, u64 *size)
1490{
1491 bool found_dma_ranges = false;
1492 struct of_bus *bus_node;
1493 const fdt32_t *ranges;
1494 int na, ns, pna, pns;
1495 int parent = node;
1496 int ret = 0;
1497 int len;
1498
1499 /* Find the closest dma-ranges property */
1500 while (parent >= 0) {
1501 ranges = fdt_getprop(blob, parent, "dma-ranges", &len);
1502
1503 /* Ignore empty ranges, they imply no translation required */
1504 if (ranges && len > 0)
1505 break;
1506
1507 /* Once we find 'dma-ranges', then a missing one is an error */
1508 if (found_dma_ranges && !ranges) {
1509 ret = -EINVAL;
1510 goto out;
1511 }
1512
1513 if (ranges)
1514 found_dma_ranges = true;
1515
1516 parent = fdt_parent_offset(blob, parent);
1517 }
1518
1519 if (!ranges || parent < 0) {
1520 debug("no dma-ranges found for node %s\n",
1521 fdt_get_name(blob, node, NULL));
1522 ret = -ENOENT;
1523 goto out;
1524 }
1525
1526 /* switch to that node */
1527 node = parent;
1528 parent = fdt_parent_offset(blob, node);
1529 if (parent < 0) {
Vagrant Cascadiand00c5c72021-12-21 13:06:58 -08001530 printf("Found dma-ranges in root node, shouldn't happen\n");
Nicolas Saenz Julienne50d2fa42021-01-12 13:55:22 +01001531 ret = -EINVAL;
1532 goto out;
1533 }
1534
1535 /* Get the address sizes both for the bus and its parent */
1536 bus_node = of_match_bus(blob, node);
1537 bus_node->count_cells(blob, node, &na, &ns);
1538 if (!OF_CHECK_COUNTS(na, ns)) {
1539 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1540 fdt_get_name(blob, node, NULL));
1541 return -EINVAL;
1542 goto out;
1543 }
1544
1545 bus_node = of_match_bus(blob, parent);
1546 bus_node->count_cells(blob, parent, &pna, &pns);
1547 if (!OF_CHECK_COUNTS(pna, pns)) {
1548 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1549 fdt_get_name(blob, parent, NULL));
1550 return -EINVAL;
1551 goto out;
1552 }
1553
1554 *bus = fdt_read_number(ranges, na);
1555 *cpu = fdt_translate_dma_address(blob, node, ranges + na);
1556 *size = fdt_read_number(ranges + na + pna, ns);
1557out:
1558 return ret;
1559}
1560
Kumar Gala800d1d12010-07-04 12:48:21 -05001561/**
Hugo Villeneuve3ab6d9c2023-04-24 16:51:50 -04001562 * fdt_node_offset_by_compat_reg: Find a node that matches compatible and
Kumar Gala800d1d12010-07-04 12:48:21 -05001563 * who's reg property matches a physical cpu address
1564 *
1565 * @blob: ptr to device tree
Hugo Villeneuve3ab6d9c2023-04-24 16:51:50 -04001566 * @compat: compatible string to match
Kumar Gala800d1d12010-07-04 12:48:21 -05001567 * @compat_off: property name
1568 *
1569 */
1570int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1571 phys_addr_t compat_off)
1572{
Marek Behún5d6b4482022-01-20 01:04:42 +01001573 int len, off;
1574
1575 fdt_for_each_node_by_compatible(off, blob, -1, compat) {
Kim Phillips6542c072013-01-16 14:00:11 +00001576 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
Marek Behún5d6b4482022-01-20 01:04:42 +01001577 if (reg && compat_off == fdt_translate_address(blob, off, reg))
1578 return off;
Kumar Gala800d1d12010-07-04 12:48:21 -05001579 }
1580
1581 return -FDT_ERR_NOTFOUND;
1582}
1583
Marek Behún4ef5ca62021-11-26 14:57:10 +01001584static int vnode_offset_by_pathf(void *blob, const char *fmt, va_list ap)
1585{
1586 char path[512];
1587 int len;
1588
1589 len = vsnprintf(path, sizeof(path), fmt, ap);
1590 if (len < 0 || len + 1 > sizeof(path))
1591 return -FDT_ERR_NOSPACE;
1592
1593 return fdt_path_offset(blob, path);
1594}
1595
1596/**
1597 * fdt_node_offset_by_pathf: Find node offset by sprintf formatted path
1598 *
1599 * @blob: ptr to device tree
1600 * @fmt: path format
1601 * @ap: vsnprintf arguments
1602 */
1603int fdt_node_offset_by_pathf(void *blob, const char *fmt, ...)
1604{
1605 va_list ap;
1606 int res;
1607
1608 va_start(ap, fmt);
1609 res = vnode_offset_by_pathf(blob, fmt, ap);
1610 va_end(ap);
1611
1612 return res;
1613}
1614
Gerald Van Barenaf737882011-07-14 21:40:10 -04001615/*
Kumar Galaf2f1c5a2011-08-01 00:23:23 -05001616 * fdt_set_phandle: Create a phandle property for the given node
Gerald Van Barenaf737882011-07-14 21:40:10 -04001617 *
1618 * @fdt: ptr to device tree
1619 * @nodeoffset: node to update
1620 * @phandle: phandle value to set (must be unique)
Kumar Galaf2f1c5a2011-08-01 00:23:23 -05001621 */
1622int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
Gerald Van Barenaf737882011-07-14 21:40:10 -04001623{
1624 int ret;
1625
1626#ifdef DEBUG
1627 int off = fdt_node_offset_by_phandle(fdt, phandle);
1628
1629 if ((off >= 0) && (off != nodeoffset)) {
1630 char buf[64];
1631
1632 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1633 printf("Trying to update node %s with phandle %u ",
1634 buf, phandle);
1635
1636 fdt_get_path(fdt, off, buf, sizeof(buf));
1637 printf("that already exists in node %s.\n", buf);
1638 return -FDT_ERR_BADPHANDLE;
1639 }
1640#endif
1641
1642 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
Gerald Van Barenaf737882011-07-14 21:40:10 -04001643
1644 return ret;
1645}
1646
Kumar Galad5fc2582011-08-01 00:25:20 -05001647/*
Marek Behúnae0ef952021-11-26 14:57:09 +01001648 * fdt_create_phandle: Get or create a phandle property for the given node
Kumar Galad5fc2582011-08-01 00:25:20 -05001649 *
1650 * @fdt: ptr to device tree
1651 * @nodeoffset: node to update
1652 */
Timur Tabi0f46c802011-09-20 18:24:34 -05001653unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
Kumar Galad5fc2582011-08-01 00:25:20 -05001654{
1655 /* see if there is a phandle already */
Marek Behún3577eba32021-11-26 14:57:07 +01001656 uint32_t phandle = fdt_get_phandle(fdt, nodeoffset);
Kumar Galad5fc2582011-08-01 00:25:20 -05001657
1658 /* if we got 0, means no phandle so create one */
1659 if (phandle == 0) {
Timur Tabi0f46c802011-09-20 18:24:34 -05001660 int ret;
1661
Marek Behún3577eba32021-11-26 14:57:07 +01001662 ret = fdt_generate_phandle(fdt, &phandle);
1663 if (ret < 0) {
1664 printf("Can't generate phandle: %s\n",
1665 fdt_strerror(ret));
1666 return 0;
1667 }
1668
Timur Tabi0f46c802011-09-20 18:24:34 -05001669 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1670 if (ret < 0) {
1671 printf("Can't set phandle %u: %s\n", phandle,
1672 fdt_strerror(ret));
1673 return 0;
1674 }
Kumar Galad5fc2582011-08-01 00:25:20 -05001675 }
1676
1677 return phandle;
1678}
1679
Marek Behún4ef5ca62021-11-26 14:57:10 +01001680/**
1681 * fdt_create_phandle_by_compatible: Get or create a phandle for first node with
1682 * given compatible
1683 *
1684 * @fdt: ptr to device tree
1685 * @compat: node's compatible string
1686 */
1687unsigned int fdt_create_phandle_by_compatible(void *fdt, const char *compat)
1688{
1689 int offset = fdt_node_offset_by_compatible(fdt, -1, compat);
1690
1691 if (offset < 0) {
1692 printf("Can't find node with compatible \"%s\": %s\n", compat,
1693 fdt_strerror(offset));
1694 return 0;
1695 }
1696
1697 return fdt_create_phandle(fdt, offset);
1698}
1699
1700/**
1701 * fdt_create_phandle_by_pathf: Get or create a phandle for node given by
1702 * sprintf-formatted path
1703 *
1704 * @fdt: ptr to device tree
1705 * @fmt, ...: path format string and arguments to pass to sprintf
1706 */
1707unsigned int fdt_create_phandle_by_pathf(void *fdt, const char *fmt, ...)
1708{
1709 va_list ap;
1710 int offset;
1711
1712 va_start(ap, fmt);
1713 offset = vnode_offset_by_pathf(fdt, fmt, ap);
1714 va_end(ap);
1715
1716 if (offset < 0) {
1717 printf("Can't find node by given path: %s\n",
1718 fdt_strerror(offset));
1719 return 0;
1720 }
1721
1722 return fdt_create_phandle(fdt, offset);
1723}
1724
Shengzhou Liua7be8022011-10-14 16:26:05 +08001725/*
1726 * fdt_set_node_status: Set status for the given node
1727 *
1728 * @fdt: ptr to device tree
1729 * @nodeoffset: node to update
Marek Behúnf872e832021-11-26 14:57:08 +01001730 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, FDT_STATUS_FAIL
Shengzhou Liua7be8022011-10-14 16:26:05 +08001731 */
Marek Behúnf872e832021-11-26 14:57:08 +01001732int fdt_set_node_status(void *fdt, int nodeoffset, enum fdt_status status)
Shengzhou Liua7be8022011-10-14 16:26:05 +08001733{
Shengzhou Liua7be8022011-10-14 16:26:05 +08001734 int ret = 0;
1735
1736 if (nodeoffset < 0)
1737 return nodeoffset;
1738
1739 switch (status) {
1740 case FDT_STATUS_OKAY:
1741 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1742 break;
1743 case FDT_STATUS_DISABLED:
1744 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1745 break;
1746 case FDT_STATUS_FAIL:
1747 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1748 break;
Shengzhou Liua7be8022011-10-14 16:26:05 +08001749 default:
1750 printf("Invalid fdt status: %x\n", status);
1751 ret = -1;
1752 break;
1753 }
1754
1755 return ret;
1756}
1757
1758/*
1759 * fdt_set_status_by_alias: Set status for the given node given an alias
1760 *
1761 * @fdt: ptr to device tree
1762 * @alias: alias of node to update
Marek Behúnf872e832021-11-26 14:57:08 +01001763 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, FDT_STATUS_FAIL
Shengzhou Liua7be8022011-10-14 16:26:05 +08001764 */
1765int fdt_set_status_by_alias(void *fdt, const char* alias,
Marek Behúnf872e832021-11-26 14:57:08 +01001766 enum fdt_status status)
Shengzhou Liua7be8022011-10-14 16:26:05 +08001767{
1768 int offset = fdt_path_offset(fdt, alias);
1769
Marek Behúnf872e832021-11-26 14:57:08 +01001770 return fdt_set_node_status(fdt, offset, status);
Shengzhou Liua7be8022011-10-14 16:26:05 +08001771}
1772
Marek Behún4ef5ca62021-11-26 14:57:10 +01001773/**
1774 * fdt_set_status_by_compatible: Set node status for first node with given
1775 * compatible
1776 *
1777 * @fdt: ptr to device tree
1778 * @compat: node's compatible string
1779 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, FDT_STATUS_FAIL
1780 */
1781int fdt_set_status_by_compatible(void *fdt, const char *compat,
1782 enum fdt_status status)
1783{
1784 int offset = fdt_node_offset_by_compatible(fdt, -1, compat);
1785
1786 if (offset < 0)
1787 return offset;
1788
1789 return fdt_set_node_status(fdt, offset, status);
1790}
1791
1792/**
1793 * fdt_set_status_by_pathf: Set node status for node given by sprintf-formatted
1794 * path
1795 *
1796 * @fdt: ptr to device tree
1797 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED, FDT_STATUS_FAIL
1798 * @fmt, ...: path format string and arguments to pass to sprintf
1799 */
1800int fdt_set_status_by_pathf(void *fdt, enum fdt_status status, const char *fmt,
1801 ...)
1802{
1803 va_list ap;
1804 int offset;
1805
1806 va_start(ap, fmt);
1807 offset = vnode_offset_by_pathf(fdt, fmt, ap);
1808 va_end(ap);
1809
1810 if (offset < 0)
1811 return offset;
1812
1813 return fdt_set_node_status(fdt, offset, status);
1814}
1815
Timur Tabi8ebaf202011-05-03 13:24:07 -05001816/*
1817 * Verify the physical address of device tree node for a given alias
1818 *
1819 * This function locates the device tree node of a given alias, and then
1820 * verifies that the physical address of that device matches the given
1821 * parameter. It displays a message if there is a mismatch.
1822 *
1823 * Returns 1 on success, 0 on failure
1824 */
1825int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1826{
1827 const char *path;
Kim Phillips6542c072013-01-16 14:00:11 +00001828 const fdt32_t *reg;
Timur Tabi8ebaf202011-05-03 13:24:07 -05001829 int node, len;
1830 u64 dt_addr;
1831
1832 path = fdt_getprop(fdt, anode, alias, NULL);
1833 if (!path) {
1834 /* If there's no such alias, then it's not a failure */
1835 return 1;
1836 }
1837
1838 node = fdt_path_offset(fdt, path);
1839 if (node < 0) {
1840 printf("Warning: device tree alias '%s' points to invalid "
1841 "node %s.\n", alias, path);
1842 return 0;
1843 }
1844
1845 reg = fdt_getprop(fdt, node, "reg", &len);
1846 if (!reg) {
1847 printf("Warning: device tree node '%s' has no address.\n",
1848 path);
1849 return 0;
1850 }
1851
1852 dt_addr = fdt_translate_address(fdt, node, reg);
1853 if (addr != dt_addr) {
Masahiro Yamadac7570a32018-08-06 20:47:40 +09001854 printf("Warning: U-Boot configured device %s at address %llu,\n"
1855 "but the device tree has it address %llx.\n",
1856 alias, addr, dt_addr);
Timur Tabi8ebaf202011-05-03 13:24:07 -05001857 return 0;
1858 }
1859
1860 return 1;
1861}
1862
1863/*
1864 * Returns the base address of an SOC or PCI node
1865 */
Simon Glass293340a2017-05-18 20:09:00 -06001866u64 fdt_get_base_address(const void *fdt, int node)
Timur Tabi8ebaf202011-05-03 13:24:07 -05001867{
1868 int size;
Kim Phillips6542c072013-01-16 14:00:11 +00001869 const fdt32_t *prop;
Timur Tabi8ebaf202011-05-03 13:24:07 -05001870
Simon Glass29f304b2017-07-04 13:31:20 -06001871 prop = fdt_getprop(fdt, node, "reg", &size);
Timur Tabi8ebaf202011-05-03 13:24:07 -05001872
Masahiro Yamadab1dd47c2019-06-27 16:39:57 +09001873 return prop ? fdt_translate_address(fdt, node, prop) : OF_BAD_ADDR;
Timur Tabi8ebaf202011-05-03 13:24:07 -05001874}
Alexander Graf19555be2014-04-11 17:09:41 +02001875
1876/*
Bin Mengd67d7d02021-02-25 17:22:24 +08001877 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells,
1878 * or 3 cells specially for a PCI address.
Alexander Graf19555be2014-04-11 17:09:41 +02001879 */
1880static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1881 uint64_t *val, int cells)
1882{
Bin Mengd67d7d02021-02-25 17:22:24 +08001883 const fdt32_t *prop32;
1884 const unaligned_fdt64_t *prop64;
Alexander Graf19555be2014-04-11 17:09:41 +02001885
1886 if ((cell_off + cells) > prop_len)
1887 return -FDT_ERR_NOSPACE;
1888
Bin Mengd67d7d02021-02-25 17:22:24 +08001889 prop32 = &prop[cell_off];
1890
1891 /*
1892 * Special handling for PCI address in PCI bus <ranges>
1893 *
1894 * PCI child address is made up of 3 cells. Advance the cell offset
1895 * by 1 so that the PCI child address can be correctly read.
1896 */
1897 if (cells == 3)
1898 cell_off += 1;
1899 prop64 = (const fdt64_t *)&prop[cell_off];
1900
Alexander Graf19555be2014-04-11 17:09:41 +02001901 switch (cells) {
1902 case 1:
1903 *val = fdt32_to_cpu(*prop32);
1904 break;
1905 case 2:
Bin Mengd67d7d02021-02-25 17:22:24 +08001906 case 3:
Alexander Graf19555be2014-04-11 17:09:41 +02001907 *val = fdt64_to_cpu(*prop64);
1908 break;
1909 default:
1910 return -FDT_ERR_NOSPACE;
1911 }
1912
1913 return 0;
1914}
1915
1916/**
1917 * fdt_read_range - Read a node's n'th range property
1918 *
1919 * @fdt: ptr to device tree
1920 * @node: offset of node
1921 * @n: range index
1922 * @child_addr: pointer to storage for the "child address" field
1923 * @addr: pointer to storage for the CPU view translated physical start
1924 * @len: pointer to storage for the range length
1925 *
1926 * Convenience function that reads and interprets a specific range out of
1927 * a number of the "ranges" property array.
1928 */
1929int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1930 uint64_t *addr, uint64_t *len)
1931{
1932 int pnode = fdt_parent_offset(fdt, node);
1933 const fdt32_t *ranges;
1934 int pacells;
1935 int acells;
1936 int scells;
1937 int ranges_len;
1938 int cell = 0;
1939 int r = 0;
1940
1941 /*
1942 * The "ranges" property is an array of
1943 * { <child address> <parent address> <size in child address space> }
1944 *
1945 * All 3 elements can span a diffent number of cells. Fetch their size.
1946 */
1947 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1948 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1949 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1950
1951 /* Now try to get the ranges property */
1952 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1953 if (!ranges)
1954 return -FDT_ERR_NOTFOUND;
1955 ranges_len /= sizeof(uint32_t);
1956
1957 /* Jump to the n'th entry */
1958 cell = n * (pacells + acells + scells);
1959
1960 /* Read <child address> */
1961 if (child_addr) {
1962 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1963 acells);
1964 if (r)
1965 return r;
1966 }
1967 cell += acells;
1968
1969 /* Read <parent address> */
1970 if (addr)
1971 *addr = fdt_translate_address(fdt, node, ranges + cell);
1972 cell += pacells;
1973
1974 /* Read <size in child address space> */
1975 if (len) {
1976 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
1977 if (r)
1978 return r;
1979 }
1980
1981 return 0;
1982}
Hans de Goedeea876372014-11-17 15:29:11 +01001983
1984/**
1985 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1986 *
1987 * @fdt: ptr to device tree
1988 * @node: offset of the simplefb node
1989 * @base_address: framebuffer base address
1990 * @width: width in pixels
1991 * @height: height in pixels
1992 * @stride: bytes per line
1993 * @format: pixel format string
1994 *
1995 * Convenience function to fill and enable a simplefb node.
1996 */
1997int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
1998 u32 height, u32 stride, const char *format)
1999{
2000 char name[32];
2001 fdt32_t cells[4];
2002 int i, addrc, sizec, ret;
2003
Simon Glassbb7c01e2017-05-18 20:09:26 -06002004 fdt_support_default_count_cells(fdt, fdt_parent_offset(fdt, node),
2005 &addrc, &sizec);
Hans de Goedeea876372014-11-17 15:29:11 +01002006 i = 0;
2007 if (addrc == 2)
2008 cells[i++] = cpu_to_fdt32(base_address >> 32);
2009 cells[i++] = cpu_to_fdt32(base_address);
2010 if (sizec == 2)
2011 cells[i++] = 0;
2012 cells[i++] = cpu_to_fdt32(height * stride);
2013
2014 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
2015 if (ret < 0)
2016 return ret;
2017
Masahiro Yamadac7570a32018-08-06 20:47:40 +09002018 snprintf(name, sizeof(name), "framebuffer@%llx", base_address);
Hans de Goedeea876372014-11-17 15:29:11 +01002019 ret = fdt_set_name(fdt, node, name);
2020 if (ret < 0)
2021 return ret;
2022
2023 ret = fdt_setprop_u32(fdt, node, "width", width);
2024 if (ret < 0)
2025 return ret;
2026
2027 ret = fdt_setprop_u32(fdt, node, "height", height);
2028 if (ret < 0)
2029 return ret;
2030
2031 ret = fdt_setprop_u32(fdt, node, "stride", stride);
2032 if (ret < 0)
2033 return ret;
2034
2035 ret = fdt_setprop_string(fdt, node, "format", format);
2036 if (ret < 0)
2037 return ret;
2038
2039 ret = fdt_setprop_string(fdt, node, "status", "okay");
2040 if (ret < 0)
2041 return ret;
2042
2043 return 0;
2044}
Tim Harvey5d7c6b52015-04-08 11:45:39 -07002045
2046/*
2047 * Update native-mode in display-timings from display environment variable.
2048 * The node to update are specified by path.
2049 */
2050int fdt_fixup_display(void *blob, const char *path, const char *display)
2051{
2052 int off, toff;
2053
2054 if (!display || !path)
2055 return -FDT_ERR_NOTFOUND;
2056
2057 toff = fdt_path_offset(blob, path);
2058 if (toff >= 0)
2059 toff = fdt_subnode_offset(blob, toff, "display-timings");
2060 if (toff < 0)
2061 return toff;
2062
2063 for (off = fdt_first_subnode(blob, toff);
2064 off >= 0;
2065 off = fdt_next_subnode(blob, off)) {
2066 uint32_t h = fdt_get_phandle(blob, off);
2067 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL),
2068 fdt32_to_cpu(h));
2069 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0)
2070 return fdt_setprop_u32(blob, toff, "native-mode", h);
2071 }
2072 return toff;
2073}
Pantelis Antoniou592386d2017-09-04 23:12:11 +03002074
2075#ifdef CONFIG_OF_LIBFDT_OVERLAY
2076/**
2077 * fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting
2078 *
2079 * @fdt: ptr to device tree
2080 * @fdto: ptr to device tree overlay
2081 *
2082 * Convenience function to apply an overlay and display helpful messages
2083 * in the case of an error
2084 */
2085int fdt_overlay_apply_verbose(void *fdt, void *fdto)
2086{
2087 int err;
2088 bool has_symbols;
2089
2090 err = fdt_path_offset(fdt, "/__symbols__");
2091 has_symbols = err >= 0;
2092
2093 err = fdt_overlay_apply(fdt, fdto);
2094 if (err < 0) {
2095 printf("failed on fdt_overlay_apply(): %s\n",
2096 fdt_strerror(err));
2097 if (!has_symbols) {
Hugo Villeneuve90730f12023-10-26 15:54:49 -04002098 printf("base fdt does not have a /__symbols__ node\n");
Pantelis Antoniou592386d2017-09-04 23:12:11 +03002099 printf("make sure you've compiled with -@\n");
2100 }
2101 }
2102 return err;
2103}
2104#endif
Kory Maincent623e1ac2021-05-04 19:31:21 +02002105
2106/**
2107 * fdt_valid() - Check if an FDT is valid. If not, change it to NULL
2108 *
2109 * @blobp: Pointer to FDT pointer
Heinrich Schuchardt47b4c022022-01-19 18:05:50 +01002110 * Return: 1 if OK, 0 if bad (in which case *blobp is set to NULL)
Kory Maincent623e1ac2021-05-04 19:31:21 +02002111 */
2112int fdt_valid(struct fdt_header **blobp)
2113{
2114 const void *blob = *blobp;
2115 int err;
2116
2117 if (!blob) {
2118 printf("The address of the fdt is invalid (NULL).\n");
2119 return 0;
2120 }
2121
2122 err = fdt_check_header(blob);
2123 if (err == 0)
2124 return 1; /* valid */
2125
2126 if (err < 0) {
2127 printf("libfdt fdt_check_header(): %s", fdt_strerror(err));
2128 /*
2129 * Be more informative on bad version.
2130 */
2131 if (err == -FDT_ERR_BADVERSION) {
2132 if (fdt_version(blob) <
2133 FDT_FIRST_SUPPORTED_VERSION) {
2134 printf(" - too old, fdt %d < %d",
2135 fdt_version(blob),
2136 FDT_FIRST_SUPPORTED_VERSION);
2137 }
2138 if (fdt_last_comp_version(blob) >
2139 FDT_LAST_SUPPORTED_VERSION) {
2140 printf(" - too new, fdt %d > %d",
2141 fdt_version(blob),
2142 FDT_LAST_SUPPORTED_VERSION);
2143 }
2144 }
2145 printf("\n");
2146 *blobp = NULL;
2147 return 0;
2148 }
2149 return 1;
2150}