blob: 3778de5368661369e41b8c6b435e86202e31f225 [file] [log] [blame]
Tom Rini83d290c2018-05-06 17:58:06 -04001// SPDX-License-Identifier: GPL-2.0+
Gerald Van Baren64dbbd42007-04-06 14:19:43 -04002/*
3 * (C) Copyright 2007
4 * Gerald Van Baren, Custom IDEAS, vanbaren@cideas.com
5 *
Shengzhou Liu2a523f52011-10-14 16:26:05 +08006 * Copyright 2010-2011 Freescale Semiconductor, Inc.
Gerald Van Baren64dbbd42007-04-06 14:19:43 -04007 */
8
9#include <common.h>
Simon Glass7b51b572019-08-01 09:46:52 -060010#include <env.h>
Simon Glassf7ae49f2020-05-10 11:40:05 -060011#include <log.h>
Heinrich Schuchardt9ad0a792018-11-18 17:58:51 +010012#include <mapmem.h>
Simon Glass90526e92020-05-10 11:39:56 -060013#include <net.h>
Anton Vorontsov3e303f72009-10-15 17:47:04 +040014#include <stdio_dev.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040015#include <linux/ctype.h>
16#include <linux/types.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040017#include <asm/global_data.h>
Masahiro Yamadab08c8c42018-03-05 01:20:11 +090018#include <linux/libfdt.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040019#include <fdt_support.h>
Kumar Gala151c8b02007-11-26 17:06:15 -060020#include <exports.h>
Bin Menga0ae3802015-12-07 01:39:47 -080021#include <fdtdec.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040022
Kumar Gala3bed2aa2008-10-23 00:05:47 -050023/**
Alexander Graf94fb1822014-04-11 17:09:40 +020024 * fdt_getprop_u32_default_node - Return a node's property or a default
25 *
26 * @fdt: ptr to device tree
27 * @off: offset of node
28 * @cell: cell offset in property
29 * @prop: property name
30 * @dflt: default value if the property isn't found
31 *
32 * Convenience function to return a node's property or a default value if
33 * the property doesn't exist.
34 */
35u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
36 const char *prop, const u32 dflt)
37{
38 const fdt32_t *val;
39 int len;
40
41 val = fdt_getprop(fdt, off, prop, &len);
42
43 /* Check if property exists */
44 if (!val)
45 return dflt;
46
47 /* Check if property is long enough */
48 if (len < ((cell + 1) * sizeof(uint32_t)))
49 return dflt;
50
51 return fdt32_to_cpu(*val);
52}
53
54/**
Kumar Gala3bed2aa2008-10-23 00:05:47 -050055 * fdt_getprop_u32_default - Find a node and return it's property or a default
56 *
57 * @fdt: ptr to device tree
58 * @path: path of node
59 * @prop: property name
60 * @dflt: default value if the property isn't found
61 *
62 * Convenience function to find a node and return it's property or a
63 * default value if it doesn't exist.
64 */
Gabe Black07e12782011-11-08 01:09:44 -080065u32 fdt_getprop_u32_default(const void *fdt, const char *path,
66 const char *prop, const u32 dflt)
Kumar Gala3bed2aa2008-10-23 00:05:47 -050067{
Kumar Gala3bed2aa2008-10-23 00:05:47 -050068 int off;
69
70 off = fdt_path_offset(fdt, path);
71 if (off < 0)
72 return dflt;
73
Alexander Graf94fb1822014-04-11 17:09:40 +020074 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt);
Kumar Gala3bed2aa2008-10-23 00:05:47 -050075}
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040076
Kumar Galaa3c29332007-10-24 10:21:57 -050077/**
78 * fdt_find_and_setprop: Find a node and set it's property
79 *
80 * @fdt: ptr to device tree
81 * @node: path of node
82 * @prop: property name
83 * @val: ptr to new value
84 * @len: length of new property value
85 * @create: flag to create the property if it doesn't exist
86 *
87 * Convenience function to directly set a property given the path to the node.
88 */
89int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
90 const void *val, int len, int create)
91{
Kumar Gala8d04f022007-10-24 11:04:22 -050092 int nodeoff = fdt_path_offset(fdt, node);
Kumar Galaa3c29332007-10-24 10:21:57 -050093
94 if (nodeoff < 0)
95 return nodeoff;
96
Kim Phillips8aa5ec62013-01-16 14:00:11 +000097 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
Kumar Galaa3c29332007-10-24 10:21:57 -050098 return 0; /* create flag not set; so exit quietly */
99
100 return fdt_setprop(fdt, nodeoff, prop, val, len);
101}
102
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900103/**
Simon Glassa9e8e292014-10-23 18:58:49 -0600104 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
105 *
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900106 * @fdt: pointer to the device tree blob
107 * @parentoffset: structure block offset of a node
108 * @name: name of the subnode to locate
109 *
110 * fdt_subnode_offset() finds a subnode of the node with a given name.
111 * If the subnode does not exist, it will be created.
112 */
Simon Glassa9e8e292014-10-23 18:58:49 -0600113int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name)
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900114{
115 int offset;
116
117 offset = fdt_subnode_offset(fdt, parentoffset, name);
118
119 if (offset == -FDT_ERR_NOTFOUND)
120 offset = fdt_add_subnode(fdt, parentoffset, name);
121
122 if (offset < 0)
123 printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset));
124
125 return offset;
126}
127
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900128/* rename to CONFIG_OF_STDOUT_PATH ? */
129#if defined(OF_STDOUT_PATH)
130static int fdt_fixup_stdout(void *fdt, int chosenoff)
131{
132 return fdt_setprop(fdt, chosenoff, "linux,stdout-path",
133 OF_STDOUT_PATH, strlen(OF_STDOUT_PATH) + 1);
134}
135#elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
Detlev Zundel40777812008-06-20 22:24:05 +0200136static int fdt_fixup_stdout(void *fdt, int chosenoff)
Kumar Gala151c8b02007-11-26 17:06:15 -0600137{
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900138 int err;
139 int aliasoff;
Kumar Gala151c8b02007-11-26 17:06:15 -0600140 char sername[9] = { 0 };
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900141 const void *path;
142 int len;
143 char tmp[256]; /* long enough */
Kumar Gala151c8b02007-11-26 17:06:15 -0600144
Bin Meng9f29aeb2016-01-13 19:38:58 -0800145 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
Kumar Gala151c8b02007-11-26 17:06:15 -0600146
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900147 aliasoff = fdt_path_offset(fdt, "/aliases");
148 if (aliasoff < 0) {
149 err = aliasoff;
Scott Woodda77c812015-09-01 22:48:08 -0500150 goto noalias;
Kumar Gala151c8b02007-11-26 17:06:15 -0600151 }
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900152
153 path = fdt_getprop(fdt, aliasoff, sername, &len);
154 if (!path) {
155 err = len;
Scott Woodda77c812015-09-01 22:48:08 -0500156 goto noalias;
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900157 }
158
159 /* fdt_setprop may break "path" so we copy it to tmp buffer */
160 memcpy(tmp, path, len);
161
162 err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len);
Kumar Gala151c8b02007-11-26 17:06:15 -0600163 if (err < 0)
164 printf("WARNING: could not set linux,stdout-path %s.\n",
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900165 fdt_strerror(err));
Kumar Gala151c8b02007-11-26 17:06:15 -0600166
167 return err;
Scott Woodda77c812015-09-01 22:48:08 -0500168
169noalias:
170 printf("WARNING: %s: could not read %s alias: %s\n",
171 __func__, sername, fdt_strerror(err));
172
173 return 0;
Kumar Gala151c8b02007-11-26 17:06:15 -0600174}
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900175#else
176static int fdt_fixup_stdout(void *fdt, int chosenoff)
177{
178 return 0;
179}
Kumar Gala151c8b02007-11-26 17:06:15 -0600180#endif
181
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900182static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name,
183 uint64_t val, int is_u64)
184{
185 if (is_u64)
186 return fdt_setprop_u64(fdt, nodeoffset, name, val);
187 else
188 return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val);
189}
190
Paul Kocialkowski10be5b52015-05-21 11:27:03 +0200191int fdt_root(void *fdt)
192{
193 char *serial;
194 int err;
195
196 err = fdt_check_header(fdt);
197 if (err < 0) {
198 printf("fdt_root: %s\n", fdt_strerror(err));
199 return err;
200 }
201
Simon Glass00caae62017-08-03 12:22:12 -0600202 serial = env_get("serial#");
Paul Kocialkowski10be5b52015-05-21 11:27:03 +0200203 if (serial) {
204 err = fdt_setprop(fdt, 0, "serial-number", serial,
205 strlen(serial) + 1);
206
207 if (err < 0) {
208 printf("WARNING: could not set serial-number %s.\n",
209 fdt_strerror(err));
210 return err;
211 }
212 }
213
214 return 0;
215}
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900216
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900217int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end)
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500218{
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900219 int nodeoffset;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500220 int err, j, total;
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900221 int is_u64;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500222 uint64_t addr, size;
223
Masahiro Yamada50babaf2014-04-18 17:41:05 +0900224 /* just return if the size of initrd is zero */
225 if (initrd_start == initrd_end)
226 return 0;
227
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900228 /* find or create "/chosen" node. */
229 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
230 if (nodeoffset < 0)
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500231 return nodeoffset;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500232
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500233 total = fdt_num_mem_rsv(fdt);
234
235 /*
236 * Look for an existing entry and update it. If we don't find
237 * the entry, we will j be the next available slot.
238 */
239 for (j = 0; j < total; j++) {
240 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
241 if (addr == initrd_start) {
242 fdt_del_mem_rsv(fdt, j);
243 break;
244 }
245 }
246
Grant Likelyce6b27a2011-03-28 09:58:55 +0000247 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500248 if (err < 0) {
249 printf("fdt_initrd: %s\n", fdt_strerror(err));
250 return err;
251 }
252
Simon Glass933cdbb2014-10-23 18:58:57 -0600253 is_u64 = (fdt_address_cells(fdt, 0) == 2);
David Fengf77a6062013-12-14 11:47:29 +0800254
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900255 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start",
256 (uint64_t)initrd_start, is_u64);
257
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900258 if (err < 0) {
259 printf("WARNING: could not set linux,initrd-start %s.\n",
260 fdt_strerror(err));
261 return err;
262 }
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900263
264 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end",
265 (uint64_t)initrd_end, is_u64);
266
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900267 if (err < 0) {
268 printf("WARNING: could not set linux,initrd-end %s.\n",
269 fdt_strerror(err));
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500270
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900271 return err;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500272 }
273
274 return 0;
275}
276
Masahiro Yamadabc6ed0f2014-04-18 17:41:00 +0900277int fdt_chosen(void *fdt)
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400278{
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400279 int nodeoffset;
280 int err;
Gerald Van Baren35ec3982007-05-25 22:08:57 -0400281 char *str; /* used to set string properties */
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400282
283 err = fdt_check_header(fdt);
284 if (err < 0) {
Gerald Van Baren5fe6be62007-08-07 21:14:22 -0400285 printf("fdt_chosen: %s\n", fdt_strerror(err));
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400286 return err;
287 }
288
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900289 /* find or create "/chosen" node. */
290 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
291 if (nodeoffset < 0)
292 return nodeoffset;
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400293
Simon Glass00caae62017-08-03 12:22:12 -0600294 str = env_get("bootargs");
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900295 if (str) {
296 err = fdt_setprop(fdt, nodeoffset, "bootargs", str,
297 strlen(str) + 1);
298 if (err < 0) {
Masahiro Yamadabc6ed0f2014-04-18 17:41:00 +0900299 printf("WARNING: could not set bootargs %s.\n",
300 fdt_strerror(err));
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900301 return err;
302 }
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400303 }
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500304
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900305 return fdt_fixup_stdout(fdt, nodeoffset);
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400306}
307
Kumar Galae93becf2007-11-03 19:46:28 -0500308void do_fixup_by_path(void *fdt, const char *path, const char *prop,
309 const void *val, int len, int create)
310{
311#if defined(DEBUG)
312 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600313 debug("Updating property '%s/%s' = ", path, prop);
Kumar Galae93becf2007-11-03 19:46:28 -0500314 for (i = 0; i < len; i++)
315 debug(" %.2x", *(u8*)(val+i));
316 debug("\n");
317#endif
318 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
319 if (rc)
320 printf("Unable to update property %s:%s, err=%s\n",
321 path, prop, fdt_strerror(rc));
322}
323
324void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
325 u32 val, int create)
326{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000327 fdt32_t tmp = cpu_to_fdt32(val);
328 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
Kumar Galae93becf2007-11-03 19:46:28 -0500329}
330
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600331void do_fixup_by_prop(void *fdt,
332 const char *pname, const void *pval, int plen,
333 const char *prop, const void *val, int len,
334 int create)
335{
336 int off;
337#if defined(DEBUG)
338 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600339 debug("Updating property '%s' = ", prop);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600340 for (i = 0; i < len; i++)
341 debug(" %.2x", *(u8*)(val+i));
342 debug("\n");
343#endif
344 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
345 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000346 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600347 fdt_setprop(fdt, off, prop, val, len);
348 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
349 }
350}
351
352void do_fixup_by_prop_u32(void *fdt,
353 const char *pname, const void *pval, int plen,
354 const char *prop, u32 val, int create)
355{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000356 fdt32_t tmp = cpu_to_fdt32(val);
357 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600358}
359
360void do_fixup_by_compat(void *fdt, const char *compat,
361 const char *prop, const void *val, int len, int create)
362{
363 int off = -1;
364#if defined(DEBUG)
365 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600366 debug("Updating property '%s' = ", prop);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600367 for (i = 0; i < len; i++)
368 debug(" %.2x", *(u8*)(val+i));
369 debug("\n");
370#endif
371 off = fdt_node_offset_by_compatible(fdt, -1, compat);
372 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000373 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600374 fdt_setprop(fdt, off, prop, val, len);
375 off = fdt_node_offset_by_compatible(fdt, off, compat);
376 }
377}
378
379void do_fixup_by_compat_u32(void *fdt, const char *compat,
380 const char *prop, u32 val, int create)
381{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000382 fdt32_t tmp = cpu_to_fdt32(val);
383 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600384}
385
Masahiro Yamada63c09412016-11-26 11:02:10 +0900386#ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900387/*
388 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
389 */
Simon Glass41f09bb2014-10-23 18:58:55 -0600390static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size,
391 int n)
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900392{
393 int i;
Hans de Goedeffccb842014-11-28 14:23:51 +0100394 int address_cells = fdt_address_cells(fdt, 0);
395 int size_cells = fdt_size_cells(fdt, 0);
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900396 char *p = buf;
397
398 for (i = 0; i < n; i++) {
Hans de Goedeffccb842014-11-28 14:23:51 +0100399 if (address_cells == 2)
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900400 *(fdt64_t *)p = cpu_to_fdt64(address[i]);
401 else
402 *(fdt32_t *)p = cpu_to_fdt32(address[i]);
Hans de Goedeffccb842014-11-28 14:23:51 +0100403 p += 4 * address_cells;
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900404
Hans de Goedeffccb842014-11-28 14:23:51 +0100405 if (size_cells == 2)
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900406 *(fdt64_t *)p = cpu_to_fdt64(size[i]);
407 else
408 *(fdt32_t *)p = cpu_to_fdt32(size[i]);
Hans de Goedeffccb842014-11-28 14:23:51 +0100409 p += 4 * size_cells;
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900410 }
411
412 return p - (char *)buf;
413}
414
Ramon Fried6b6f2162018-08-14 00:35:42 +0300415#if CONFIG_NR_DRAM_BANKS > 4
416#define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
417#else
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000418#define MEMORY_BANKS_MAX 4
Ramon Fried6b6f2162018-08-14 00:35:42 +0300419#endif
John Rigbya6bd9e82010-10-13 13:57:33 -0600420int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
421{
422 int err, nodeoffset;
Thierry Reding6d29cc72018-01-30 11:34:17 +0100423 int len, i;
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000424 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
Kumar Gala3c927282007-11-26 14:57:45 -0600425
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000426 if (banks > MEMORY_BANKS_MAX) {
427 printf("%s: num banks %d exceeds hardcoded limit %d."
428 " Recompile with higher MEMORY_BANKS_MAX?\n",
429 __FUNCTION__, banks, MEMORY_BANKS_MAX);
430 return -1;
431 }
432
Kumar Gala3c927282007-11-26 14:57:45 -0600433 err = fdt_check_header(blob);
434 if (err < 0) {
435 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
436 return err;
437 }
438
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900439 /* find or create "/memory" node. */
440 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
441 if (nodeoffset < 0)
Miao Yan35940de2013-11-28 17:51:39 +0800442 return nodeoffset;
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900443
Kumar Gala3c927282007-11-26 14:57:45 -0600444 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
445 sizeof("memory"));
446 if (err < 0) {
447 printf("WARNING: could not set %s %s.\n", "device_type",
448 fdt_strerror(err));
449 return err;
450 }
451
Thierry Redinged5af032018-02-15 19:05:59 +0100452 for (i = 0; i < banks; i++) {
453 if (start[i] == 0 && size[i] == 0)
454 break;
455 }
456
457 banks = i;
458
Andre Przywara5c1cf892015-06-21 00:29:54 +0100459 if (!banks)
460 return 0;
461
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900462 len = fdt_pack_reg(blob, tmp, start, size, banks);
Kumar Gala3c927282007-11-26 14:57:45 -0600463
464 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
465 if (err < 0) {
466 printf("WARNING: could not set %s %s.\n",
467 "reg", fdt_strerror(err));
468 return err;
469 }
470 return 0;
471}
Igor Opaniuk949b5a92019-12-03 14:04:46 +0200472
473int fdt_set_usable_memory(void *blob, u64 start[], u64 size[], int areas)
474{
475 int err, nodeoffset;
476 int len;
477 u8 tmp[8 * 16]; /* Up to 64-bit address + 64-bit size */
478
479 if (areas > 8) {
480 printf("%s: num areas %d exceeds hardcoded limit %d\n",
481 __func__, areas, 8);
482 return -1;
483 }
484
485 err = fdt_check_header(blob);
486 if (err < 0) {
487 printf("%s: %s\n", __func__, fdt_strerror(err));
488 return err;
489 }
490
491 /* find or create "/memory" node. */
492 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
493 if (nodeoffset < 0)
494 return nodeoffset;
495
496 len = fdt_pack_reg(blob, tmp, start, size, areas);
497
498 err = fdt_setprop(blob, nodeoffset, "linux,usable-memory", tmp, len);
499 if (err < 0) {
500 printf("WARNING: could not set %s %s.\n",
501 "reg", fdt_strerror(err));
502 return err;
503 }
504
505 return 0;
506}
Masahiro Yamada63c09412016-11-26 11:02:10 +0900507#endif
Kumar Gala3c927282007-11-26 14:57:45 -0600508
John Rigbya6bd9e82010-10-13 13:57:33 -0600509int fdt_fixup_memory(void *blob, u64 start, u64 size)
510{
511 return fdt_fixup_memory_banks(blob, &start, &size, 1);
512}
513
Kumar Galaba37aa02008-08-19 15:41:18 -0500514void fdt_fixup_ethernet(void *fdt)
Kumar Galaab544632007-11-21 11:11:03 -0600515{
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530516 int i = 0, j, prop;
Bin Mengbc393a72015-11-03 04:24:41 -0800517 char *tmp, *end;
Stephen Warren064d55f2013-05-27 18:01:19 +0000518 char mac[16];
Kumar Galaab544632007-11-21 11:11:03 -0600519 const char *path;
oliver@schinagl.nla40db6d2016-11-25 16:30:19 +0100520 unsigned char mac_addr[ARP_HLEN];
Bin Mengbc393a72015-11-03 04:24:41 -0800521 int offset;
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530522#ifdef FDT_SEQ_MACADDR_FROM_ENV
523 int nodeoff;
524 const struct fdt_property *fdt_prop;
525#endif
Kumar Galaab544632007-11-21 11:11:03 -0600526
Lev Iserovicha434fd12016-01-07 18:04:16 -0500527 if (fdt_path_offset(fdt, "/aliases") < 0)
Kumar Galaba37aa02008-08-19 15:41:18 -0500528 return;
529
Lev Iserovicha434fd12016-01-07 18:04:16 -0500530 /* Cycle through all aliases */
531 for (prop = 0; ; prop++) {
Bin Mengbc393a72015-11-03 04:24:41 -0800532 const char *name;
Bin Mengbc393a72015-11-03 04:24:41 -0800533
Lev Iserovicha434fd12016-01-07 18:04:16 -0500534 /* FDT might have been edited, recompute the offset */
535 offset = fdt_first_property_offset(fdt,
536 fdt_path_offset(fdt, "/aliases"));
537 /* Select property number 'prop' */
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530538 for (j = 0; j < prop; j++)
Lev Iserovicha434fd12016-01-07 18:04:16 -0500539 offset = fdt_next_property_offset(fdt, offset);
540
541 if (offset < 0)
542 break;
543
Bin Mengbc393a72015-11-03 04:24:41 -0800544 path = fdt_getprop_by_offset(fdt, offset, &name, NULL);
Tuomas Tynkkynenf8e57c62017-03-20 10:04:55 +0200545 if (!strncmp(name, "ethernet", 8)) {
546 /* Treat plain "ethernet" same as "ethernet0". */
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530547 if (!strcmp(name, "ethernet")
548#ifdef FDT_SEQ_MACADDR_FROM_ENV
549 || !strcmp(name, "ethernet0")
550#endif
551 )
Tuomas Tynkkynenf8e57c62017-03-20 10:04:55 +0200552 i = 0;
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530553#ifndef FDT_SEQ_MACADDR_FROM_ENV
Tuomas Tynkkynenf8e57c62017-03-20 10:04:55 +0200554 else
555 i = trailing_strtol(name);
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530556#endif
Bin Mengbc393a72015-11-03 04:24:41 -0800557 if (i != -1) {
558 if (i == 0)
559 strcpy(mac, "ethaddr");
560 else
561 sprintf(mac, "eth%daddr", i);
562 } else {
563 continue;
564 }
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530565#ifdef FDT_SEQ_MACADDR_FROM_ENV
566 nodeoff = fdt_path_offset(fdt, path);
567 fdt_prop = fdt_get_property(fdt, nodeoff, "status",
568 NULL);
569 if (fdt_prop && !strcmp(fdt_prop->data, "disabled"))
570 continue;
571 i++;
572#endif
Simon Glass00caae62017-08-03 12:22:12 -0600573 tmp = env_get(mac);
Bin Mengbc393a72015-11-03 04:24:41 -0800574 if (!tmp)
575 continue;
576
577 for (j = 0; j < 6; j++) {
578 mac_addr[j] = tmp ?
579 simple_strtoul(tmp, &end, 16) : 0;
580 if (tmp)
581 tmp = (*end) ? end + 1 : end;
582 }
583
584 do_fixup_by_path(fdt, path, "mac-address",
585 &mac_addr, 6, 0);
586 do_fixup_by_path(fdt, path, "local-mac-address",
587 &mac_addr, 6, 1);
Dan Murphyb1f49ab2013-10-02 14:00:15 -0500588 }
Kumar Galaab544632007-11-21 11:11:03 -0600589 }
590}
Anton Vorontsov18e69a32008-03-14 23:20:18 +0300591
Philipp Tomsicha5af51a2018-02-02 12:01:44 +0100592int fdt_record_loadable(void *blob, u32 index, const char *name,
593 uintptr_t load_addr, u32 size, uintptr_t entry_point,
594 const char *type, const char *os)
595{
596 int err, node;
597
598 err = fdt_check_header(blob);
599 if (err < 0) {
600 printf("%s: %s\n", __func__, fdt_strerror(err));
601 return err;
602 }
603
604 /* find or create "/fit-images" node */
605 node = fdt_find_or_add_subnode(blob, 0, "fit-images");
606 if (node < 0)
607 return node;
608
609 /* find or create "/fit-images/<name>" node */
610 node = fdt_find_or_add_subnode(blob, node, name);
611 if (node < 0)
612 return node;
613
614 /*
615 * We record these as 32bit entities, possibly truncating addresses.
616 * However, spl_fit.c is not 64bit safe either: i.e. we should not
617 * have an issue here.
618 */
619 fdt_setprop_u32(blob, node, "load-addr", load_addr);
620 if (entry_point != -1)
621 fdt_setprop_u32(blob, node, "entry-point", entry_point);
622 fdt_setprop_u32(blob, node, "size", size);
623 if (type)
624 fdt_setprop_string(blob, node, "type", type);
625 if (os)
626 fdt_setprop_string(blob, node, "os", os);
627
628 return node;
629}
630
Kumar Gala3082d232008-08-15 08:24:42 -0500631/* Resize the fdt to its actual size + a bit of padding */
Hannes Schmelzeref476832016-09-20 18:10:43 +0200632int fdt_shrink_to_minimum(void *blob, uint extrasize)
Kumar Gala3082d232008-08-15 08:24:42 -0500633{
634 int i;
635 uint64_t addr, size;
636 int total, ret;
637 uint actualsize;
Simon Goldschmidt59bd7962019-05-03 21:19:03 +0200638 int fdt_memrsv = 0;
Kumar Gala3082d232008-08-15 08:24:42 -0500639
640 if (!blob)
641 return 0;
642
643 total = fdt_num_mem_rsv(blob);
644 for (i = 0; i < total; i++) {
645 fdt_get_mem_rsv(blob, i, &addr, &size);
Simon Glass92549352011-09-17 06:48:58 +0000646 if (addr == (uintptr_t)blob) {
Kumar Gala3082d232008-08-15 08:24:42 -0500647 fdt_del_mem_rsv(blob, i);
Simon Goldschmidt59bd7962019-05-03 21:19:03 +0200648 fdt_memrsv = 1;
Kumar Gala3082d232008-08-15 08:24:42 -0500649 break;
650 }
651 }
652
Peter Korsgaardf242a082008-10-28 08:26:52 +0100653 /*
654 * Calculate the actual size of the fdt
Feng Wang3840ebf2010-08-03 16:22:43 +0200655 * plus the size needed for 5 fdt_add_mem_rsv, one
656 * for the fdt itself and 4 for a possible initrd
657 * ((initrd-start + initrd-end) * 2 (name & value))
Peter Korsgaardf242a082008-10-28 08:26:52 +0100658 */
Kumar Gala3082d232008-08-15 08:24:42 -0500659 actualsize = fdt_off_dt_strings(blob) +
Feng Wang3840ebf2010-08-03 16:22:43 +0200660 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
Kumar Gala3082d232008-08-15 08:24:42 -0500661
Hannes Schmelzeref476832016-09-20 18:10:43 +0200662 actualsize += extrasize;
Kumar Gala3082d232008-08-15 08:24:42 -0500663 /* Make it so the fdt ends on a page boundary */
Simon Glass92549352011-09-17 06:48:58 +0000664 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
665 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
Kumar Gala3082d232008-08-15 08:24:42 -0500666
667 /* Change the fdt header to reflect the correct size */
668 fdt_set_totalsize(blob, actualsize);
669
Simon Goldschmidt59bd7962019-05-03 21:19:03 +0200670 if (fdt_memrsv) {
671 /* Add the new reservation */
672 ret = fdt_add_mem_rsv(blob, map_to_sysmem(blob), actualsize);
673 if (ret < 0)
674 return ret;
675 }
Kumar Gala3082d232008-08-15 08:24:42 -0500676
677 return actualsize;
678}
Kumar Gala8ab451c2008-10-22 23:33:56 -0500679
680#ifdef CONFIG_PCI
Kumar Galacfd700b2009-08-05 09:03:54 -0500681#define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
Kumar Gala8ab451c2008-10-22 23:33:56 -0500682
683#define FDT_PCI_PREFETCH (0x40000000)
684#define FDT_PCI_MEM32 (0x02000000)
685#define FDT_PCI_IO (0x01000000)
686#define FDT_PCI_MEM64 (0x03000000)
687
688int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
689
690 int addrcell, sizecell, len, r;
691 u32 *dma_range;
692 /* sized based on pci addr cells, size-cells, & address-cells */
693 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
694
695 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
696 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
697
698 dma_range = &dma_ranges[0];
699 for (r = 0; r < hose->region_count; r++) {
700 u64 bus_start, phys_start, size;
701
Kumar Galaff4e66e2009-02-06 09:49:31 -0600702 /* skip if !PCI_REGION_SYS_MEMORY */
703 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
Kumar Gala8ab451c2008-10-22 23:33:56 -0500704 continue;
705
706 bus_start = (u64)hose->regions[r].bus_start;
707 phys_start = (u64)hose->regions[r].phys_start;
708 size = (u64)hose->regions[r].size;
709
710 dma_range[0] = 0;
Kumar Galacfd700b2009-08-05 09:03:54 -0500711 if (size >= 0x100000000ull)
Marek Vasut867aaf62019-07-09 02:49:29 +0200712 dma_range[0] |= cpu_to_fdt32(FDT_PCI_MEM64);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500713 else
Marek Vasut867aaf62019-07-09 02:49:29 +0200714 dma_range[0] |= cpu_to_fdt32(FDT_PCI_MEM32);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500715 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
Marek Vasut867aaf62019-07-09 02:49:29 +0200716 dma_range[0] |= cpu_to_fdt32(FDT_PCI_PREFETCH);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500717#ifdef CONFIG_SYS_PCI_64BIT
Marek Vasut867aaf62019-07-09 02:49:29 +0200718 dma_range[1] = cpu_to_fdt32(bus_start >> 32);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500719#else
720 dma_range[1] = 0;
721#endif
Marek Vasut867aaf62019-07-09 02:49:29 +0200722 dma_range[2] = cpu_to_fdt32(bus_start & 0xffffffff);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500723
724 if (addrcell == 2) {
Marek Vasut867aaf62019-07-09 02:49:29 +0200725 dma_range[3] = cpu_to_fdt32(phys_start >> 32);
726 dma_range[4] = cpu_to_fdt32(phys_start & 0xffffffff);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500727 } else {
Marek Vasut867aaf62019-07-09 02:49:29 +0200728 dma_range[3] = cpu_to_fdt32(phys_start & 0xffffffff);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500729 }
730
731 if (sizecell == 2) {
Marek Vasut867aaf62019-07-09 02:49:29 +0200732 dma_range[3 + addrcell + 0] =
733 cpu_to_fdt32(size >> 32);
734 dma_range[3 + addrcell + 1] =
735 cpu_to_fdt32(size & 0xffffffff);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500736 } else {
Marek Vasut867aaf62019-07-09 02:49:29 +0200737 dma_range[3 + addrcell + 0] =
738 cpu_to_fdt32(size & 0xffffffff);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500739 }
740
741 dma_range += (3 + addrcell + sizecell);
742 }
743
744 len = dma_range - &dma_ranges[0];
745 if (len)
746 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
747
748 return 0;
749}
750#endif
Stefan Roese30d45c02009-10-21 11:59:52 +0200751
Matthew McClintockcb2707a2010-10-13 13:39:26 +0200752int fdt_increase_size(void *fdt, int add_len)
753{
754 int newlen;
755
756 newlen = fdt_totalsize(fdt) + add_len;
757
758 /* Open in place with a new len */
759 return fdt_open_into(fdt, fdt, newlen);
760}
761
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100762#ifdef CONFIG_FDT_FIXUP_PARTITIONS
763#include <jffs2/load_kernel.h>
764#include <mtd_node.h>
765
Michal Simekcd1457d2018-07-31 14:31:04 +0200766static int fdt_del_subnodes(const void *blob, int parent_offset)
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100767{
768 int off, ndepth;
769 int ret;
770
771 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
772 (off >= 0) && (ndepth > 0);
773 off = fdt_next_node(blob, off, &ndepth)) {
774 if (ndepth == 1) {
775 debug("delete %s: offset: %x\n",
776 fdt_get_name(blob, off, 0), off);
777 ret = fdt_del_node((void *)blob, off);
778 if (ret < 0) {
779 printf("Can't delete node: %s\n",
780 fdt_strerror(ret));
781 return ret;
782 } else {
783 ndepth = 0;
784 off = parent_offset;
785 }
786 }
787 }
788 return 0;
789}
790
Michal Simekcd1457d2018-07-31 14:31:04 +0200791static int fdt_del_partitions(void *blob, int parent_offset)
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100792{
793 const void *prop;
794 int ndepth = 0;
795 int off;
796 int ret;
797
798 off = fdt_next_node(blob, parent_offset, &ndepth);
799 if (off > 0 && ndepth == 1) {
800 prop = fdt_getprop(blob, off, "label", NULL);
801 if (prop == NULL) {
802 /*
803 * Could not find label property, nand {}; node?
804 * Check subnode, delete partitions there if any.
805 */
806 return fdt_del_partitions(blob, off);
807 } else {
808 ret = fdt_del_subnodes(blob, parent_offset);
809 if (ret < 0) {
810 printf("Can't remove subnodes: %s\n",
811 fdt_strerror(ret));
812 return ret;
813 }
814 }
815 }
816 return 0;
817}
818
819int fdt_node_set_part_info(void *blob, int parent_offset,
820 struct mtd_device *dev)
821{
822 struct list_head *pentry;
823 struct part_info *part;
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100824 int off, ndepth = 0;
825 int part_num, ret;
Stefan Mavrodiev3a9a62a2019-04-24 08:31:54 +0300826 int sizecell;
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100827 char buf[64];
828
829 ret = fdt_del_partitions(blob, parent_offset);
830 if (ret < 0)
831 return ret;
832
833 /*
Stefan Mavrodiev3a9a62a2019-04-24 08:31:54 +0300834 * Check if size/address is 1 or 2 cells.
835 * We assume #address-cells and #size-cells have same value.
836 */
837 sizecell = fdt_getprop_u32_default_node(blob, parent_offset,
838 0, "#size-cells", 1);
839
840 /*
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100841 * Check if it is nand {}; subnode, adjust
842 * the offset in this case
843 */
844 off = fdt_next_node(blob, parent_offset, &ndepth);
845 if (off > 0 && ndepth == 1)
846 parent_offset = off;
847
848 part_num = 0;
849 list_for_each_prev(pentry, &dev->parts) {
850 int newoff;
851
852 part = list_entry(pentry, struct part_info, link);
853
Scott Wood06503f12013-10-15 17:41:27 -0500854 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100855 part_num, part->name, part->size,
856 part->offset, part->mask_flags);
857
Scott Wood06503f12013-10-15 17:41:27 -0500858 sprintf(buf, "partition@%llx", part->offset);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100859add_sub:
860 ret = fdt_add_subnode(blob, parent_offset, buf);
861 if (ret == -FDT_ERR_NOSPACE) {
862 ret = fdt_increase_size(blob, 512);
863 if (!ret)
864 goto add_sub;
865 else
866 goto err_size;
867 } else if (ret < 0) {
868 printf("Can't add partition node: %s\n",
869 fdt_strerror(ret));
870 return ret;
871 }
872 newoff = ret;
873
874 /* Check MTD_WRITEABLE_CMD flag */
875 if (part->mask_flags & 1) {
876add_ro:
877 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
878 if (ret == -FDT_ERR_NOSPACE) {
879 ret = fdt_increase_size(blob, 512);
880 if (!ret)
881 goto add_ro;
882 else
883 goto err_size;
884 } else if (ret < 0)
885 goto err_prop;
886 }
887
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100888add_reg:
Stefan Mavrodiev3a9a62a2019-04-24 08:31:54 +0300889 if (sizecell == 2) {
890 ret = fdt_setprop_u64(blob, newoff,
891 "reg", part->offset);
892 if (!ret)
893 ret = fdt_appendprop_u64(blob, newoff,
894 "reg", part->size);
895 } else {
896 ret = fdt_setprop_u32(blob, newoff,
897 "reg", part->offset);
898 if (!ret)
899 ret = fdt_appendprop_u32(blob, newoff,
900 "reg", part->size);
901 }
902
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100903 if (ret == -FDT_ERR_NOSPACE) {
904 ret = fdt_increase_size(blob, 512);
905 if (!ret)
906 goto add_reg;
907 else
908 goto err_size;
909 } else if (ret < 0)
910 goto err_prop;
911
912add_label:
913 ret = fdt_setprop_string(blob, newoff, "label", part->name);
914 if (ret == -FDT_ERR_NOSPACE) {
915 ret = fdt_increase_size(blob, 512);
916 if (!ret)
917 goto add_label;
918 else
919 goto err_size;
920 } else if (ret < 0)
921 goto err_prop;
922
923 part_num++;
924 }
925 return 0;
926err_size:
927 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
928 return ret;
929err_prop:
930 printf("Can't add property: %s\n", fdt_strerror(ret));
931 return ret;
932}
933
934/*
935 * Update partitions in nor/nand nodes using info from
936 * mtdparts environment variable. The nodes to update are
937 * specified by node_info structure which contains mtd device
938 * type and compatible string: E. g. the board code in
939 * ft_board_setup() could use:
940 *
941 * struct node_info nodes[] = {
942 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
943 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
944 * };
945 *
946 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
947 */
Masahiro Yamada5f4e32d2018-07-19 16:28:22 +0900948void fdt_fixup_mtdparts(void *blob, const struct node_info *node_info,
949 int node_info_size)
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100950{
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100951 struct mtd_device *dev;
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100952 int i, idx;
953 int noff;
954
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100955 if (mtdparts_init() != 0)
956 return;
957
958 for (i = 0; i < node_info_size; i++) {
959 idx = 0;
Masahiro Yamada5f4e32d2018-07-19 16:28:22 +0900960 noff = fdt_node_offset_by_compatible(blob, -1,
961 node_info[i].compat);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100962 while (noff != -FDT_ERR_NOTFOUND) {
963 debug("%s: %s, mtd dev type %d\n",
964 fdt_get_name(blob, noff, 0),
Masahiro Yamada5f4e32d2018-07-19 16:28:22 +0900965 node_info[i].compat, node_info[i].type);
966 dev = device_find(node_info[i].type, idx++);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100967 if (dev) {
968 if (fdt_node_set_part_info(blob, noff, dev))
969 return; /* return on error */
970 }
971
972 /* Jump to next flash node */
973 noff = fdt_node_offset_by_compatible(blob, noff,
Masahiro Yamada5f4e32d2018-07-19 16:28:22 +0900974 node_info[i].compat);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100975 }
976 }
977}
978#endif
Kumar Gala49b97d92010-03-30 10:19:26 -0500979
980void fdt_del_node_and_alias(void *blob, const char *alias)
981{
982 int off = fdt_path_offset(blob, alias);
983
984 if (off < 0)
985 return;
986
987 fdt_del_node(blob, off);
988
989 off = fdt_path_offset(blob, "/aliases");
990 fdt_delprop(blob, off, alias);
991}
Kumar Galaa0342c02010-06-16 14:27:38 -0500992
Kumar Galaa0342c02010-06-16 14:27:38 -0500993/* Max address size we deal with */
994#define OF_MAX_ADDR_CELLS 4
Bin Menga0ae3802015-12-07 01:39:47 -0800995#define OF_BAD_ADDR FDT_ADDR_T_NONE
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +0100996#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
997 (ns) > 0)
Kumar Galaa0342c02010-06-16 14:27:38 -0500998
999/* Debug utility */
1000#ifdef DEBUG
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001001static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -05001002{
1003 printf("%s", s);
1004 while(na--)
1005 printf(" %08x", *(addr++));
1006 printf("\n");
1007}
1008#else
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001009static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
Kumar Galaa0342c02010-06-16 14:27:38 -05001010#endif
1011
Paul Burton0a222d52016-05-17 07:43:24 +01001012/**
1013 * struct of_bus - Callbacks for bus specific translators
Paul Burton49717b12016-05-17 07:43:25 +01001014 * @name: A string used to identify this bus in debug output.
1015 * @addresses: The name of the DT property from which addresses are
1016 * to be read, typically "reg".
Paul Burton0a222d52016-05-17 07:43:24 +01001017 * @match: Return non-zero if the node whose parent is at
1018 * parentoffset in the FDT blob corresponds to a bus
1019 * of this type, otherwise return zero. If NULL a match
1020 * is assumed.
Paul Burton49717b12016-05-17 07:43:25 +01001021 * @count_cells:Count how many cells (be32 values) a node whose parent
1022 * is at parentoffset in the FDT blob will require to
1023 * represent its address (written to *addrc) & size
1024 * (written to *sizec).
1025 * @map: Map the address addr from the address space of this
1026 * bus to that of its parent, making use of the ranges
1027 * read from DT to an array at range. na and ns are the
1028 * number of cells (be32 values) used to hold and address
1029 * or size, respectively, for this bus. pna is the number
1030 * of cells used to hold an address for the parent bus.
1031 * Returns the address in the address space of the parent
1032 * bus.
1033 * @translate: Update the value of the address cells at addr within an
1034 * FDT by adding offset to it. na specifies the number of
1035 * cells used to hold the address being translated. Returns
1036 * zero on success, non-zero on error.
Paul Burton0a222d52016-05-17 07:43:24 +01001037 *
1038 * Each bus type will include a struct of_bus in the of_busses array,
1039 * providing implementations of some or all of the functions used to
1040 * match the bus & handle address translation for its children.
1041 */
Kumar Galaa0342c02010-06-16 14:27:38 -05001042struct of_bus {
1043 const char *name;
1044 const char *addresses;
Stephen Warren11e44fc2016-08-05 09:47:50 -06001045 int (*match)(const void *blob, int parentoffset);
1046 void (*count_cells)(const void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -05001047 int *addrc, int *sizec);
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001048 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -05001049 int na, int ns, int pna);
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001050 int (*translate)(fdt32_t *addr, u64 offset, int na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001051};
1052
1053/* Default translator (generic bus) */
Simon Glasseed36602017-05-18 20:09:26 -06001054void fdt_support_default_count_cells(const void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -05001055 int *addrc, int *sizec)
1056{
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001057 const fdt32_t *prop;
Scott Wood6395f312010-08-12 18:37:39 -05001058
Simon Glass933cdbb2014-10-23 18:58:57 -06001059 if (addrc)
1060 *addrc = fdt_address_cells(blob, parentoffset);
Scott Wood6395f312010-08-12 18:37:39 -05001061
1062 if (sizec) {
1063 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
1064 if (prop)
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001065 *sizec = be32_to_cpup(prop);
Scott Wood6395f312010-08-12 18:37:39 -05001066 else
1067 *sizec = 1;
1068 }
Kumar Galaa0342c02010-06-16 14:27:38 -05001069}
1070
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001071static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -05001072 int na, int ns, int pna)
1073{
1074 u64 cp, s, da;
1075
Simon Glasseed36602017-05-18 20:09:26 -06001076 cp = fdt_read_number(range, na);
1077 s = fdt_read_number(range + na + pna, ns);
1078 da = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001079
Sekhar Norid8e9cf42018-12-06 15:20:47 +05301080 debug("OF: default map, cp=%llx, s=%llx, da=%llx\n", cp, s, da);
Kumar Galaa0342c02010-06-16 14:27:38 -05001081
1082 if (da < cp || da >= (cp + s))
1083 return OF_BAD_ADDR;
1084 return da - cp;
1085}
1086
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001087static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -05001088{
Simon Glasseed36602017-05-18 20:09:26 -06001089 u64 a = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001090 memset(addr, 0, na * 4);
1091 a += offset;
1092 if (na > 1)
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001093 addr[na - 2] = cpu_to_fdt32(a >> 32);
1094 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
Kumar Galaa0342c02010-06-16 14:27:38 -05001095
1096 return 0;
1097}
1098
Paul Burton0a222d52016-05-17 07:43:24 +01001099#ifdef CONFIG_OF_ISA_BUS
1100
1101/* ISA bus translator */
Stephen Warren11e44fc2016-08-05 09:47:50 -06001102static int of_bus_isa_match(const void *blob, int parentoffset)
Paul Burton0a222d52016-05-17 07:43:24 +01001103{
1104 const char *name;
1105
1106 name = fdt_get_name(blob, parentoffset, NULL);
1107 if (!name)
1108 return 0;
1109
1110 return !strcmp(name, "isa");
1111}
1112
Stephen Warren11e44fc2016-08-05 09:47:50 -06001113static void of_bus_isa_count_cells(const void *blob, int parentoffset,
Paul Burton0a222d52016-05-17 07:43:24 +01001114 int *addrc, int *sizec)
1115{
1116 if (addrc)
1117 *addrc = 2;
1118 if (sizec)
1119 *sizec = 1;
1120}
1121
1122static u64 of_bus_isa_map(fdt32_t *addr, const fdt32_t *range,
1123 int na, int ns, int pna)
1124{
1125 u64 cp, s, da;
1126
1127 /* Check address type match */
1128 if ((addr[0] ^ range[0]) & cpu_to_be32(1))
1129 return OF_BAD_ADDR;
1130
Simon Glasseed36602017-05-18 20:09:26 -06001131 cp = fdt_read_number(range + 1, na - 1);
1132 s = fdt_read_number(range + na + pna, ns);
1133 da = fdt_read_number(addr + 1, na - 1);
Paul Burton0a222d52016-05-17 07:43:24 +01001134
Sekhar Norid8e9cf42018-12-06 15:20:47 +05301135 debug("OF: ISA map, cp=%llx, s=%llx, da=%llx\n", cp, s, da);
Paul Burton0a222d52016-05-17 07:43:24 +01001136
1137 if (da < cp || da >= (cp + s))
1138 return OF_BAD_ADDR;
1139 return da - cp;
1140}
1141
1142static int of_bus_isa_translate(fdt32_t *addr, u64 offset, int na)
1143{
1144 return of_bus_default_translate(addr + 1, offset, na - 1);
1145}
1146
1147#endif /* CONFIG_OF_ISA_BUS */
1148
Kumar Galaa0342c02010-06-16 14:27:38 -05001149/* Array of bus specific translators */
1150static struct of_bus of_busses[] = {
Paul Burton0a222d52016-05-17 07:43:24 +01001151#ifdef CONFIG_OF_ISA_BUS
1152 /* ISA */
1153 {
1154 .name = "isa",
1155 .addresses = "reg",
1156 .match = of_bus_isa_match,
1157 .count_cells = of_bus_isa_count_cells,
1158 .map = of_bus_isa_map,
1159 .translate = of_bus_isa_translate,
1160 },
1161#endif /* CONFIG_OF_ISA_BUS */
Kumar Galaa0342c02010-06-16 14:27:38 -05001162 /* Default */
1163 {
1164 .name = "default",
1165 .addresses = "reg",
Simon Glasseed36602017-05-18 20:09:26 -06001166 .count_cells = fdt_support_default_count_cells,
Kumar Galaa0342c02010-06-16 14:27:38 -05001167 .map = of_bus_default_map,
1168 .translate = of_bus_default_translate,
1169 },
1170};
1171
Stephen Warren11e44fc2016-08-05 09:47:50 -06001172static struct of_bus *of_match_bus(const void *blob, int parentoffset)
Paul Burton0a222d52016-05-17 07:43:24 +01001173{
1174 struct of_bus *bus;
1175
1176 if (ARRAY_SIZE(of_busses) == 1)
1177 return of_busses;
1178
1179 for (bus = of_busses; bus; bus++) {
1180 if (!bus->match || bus->match(blob, parentoffset))
1181 return bus;
1182 }
1183
1184 /*
1185 * We should always have matched the default bus at least, since
1186 * it has a NULL match field. If we didn't then it somehow isn't
1187 * in the of_busses array or something equally catastrophic has
1188 * gone wrong.
1189 */
1190 assert(0);
1191 return NULL;
1192}
1193
Stephen Warren11e44fc2016-08-05 09:47:50 -06001194static int of_translate_one(const void *blob, int parent, struct of_bus *bus,
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001195 struct of_bus *pbus, fdt32_t *addr,
Kumar Galaa0342c02010-06-16 14:27:38 -05001196 int na, int ns, int pna, const char *rprop)
1197{
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001198 const fdt32_t *ranges;
Kumar Galaa0342c02010-06-16 14:27:38 -05001199 int rlen;
1200 int rone;
1201 u64 offset = OF_BAD_ADDR;
1202
1203 /* Normally, an absence of a "ranges" property means we are
1204 * crossing a non-translatable boundary, and thus the addresses
1205 * below the current not cannot be converted to CPU physical ones.
1206 * Unfortunately, while this is very clear in the spec, it's not
1207 * what Apple understood, and they do have things like /uni-n or
1208 * /ht nodes with no "ranges" property and a lot of perfectly
1209 * useable mapped devices below them. Thus we treat the absence of
1210 * "ranges" as equivalent to an empty "ranges" property which means
1211 * a 1:1 translation at that level. It's up to the caller not to try
1212 * to translate addresses that aren't supposed to be translated in
1213 * the first place. --BenH.
1214 */
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001215 ranges = fdt_getprop(blob, parent, rprop, &rlen);
Kumar Galaa0342c02010-06-16 14:27:38 -05001216 if (ranges == NULL || rlen == 0) {
Simon Glasseed36602017-05-18 20:09:26 -06001217 offset = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001218 memset(addr, 0, pna * 4);
1219 debug("OF: no ranges, 1:1 translation\n");
1220 goto finish;
1221 }
1222
1223 debug("OF: walking ranges...\n");
1224
1225 /* Now walk through the ranges */
1226 rlen /= 4;
1227 rone = na + pna + ns;
1228 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1229 offset = bus->map(addr, ranges, na, ns, pna);
1230 if (offset != OF_BAD_ADDR)
1231 break;
1232 }
1233 if (offset == OF_BAD_ADDR) {
1234 debug("OF: not found !\n");
1235 return 1;
1236 }
1237 memcpy(addr, ranges + na, 4 * pna);
1238
1239 finish:
1240 of_dump_addr("OF: parent translation for:", addr, pna);
Masahiro Yamadadee37fc2018-08-06 20:47:40 +09001241 debug("OF: with offset: %llu\n", offset);
Kumar Galaa0342c02010-06-16 14:27:38 -05001242
1243 /* Translate it into parent bus space */
1244 return pbus->translate(addr, offset, pna);
1245}
1246
1247/*
1248 * Translate an address from the device-tree into a CPU physical address,
1249 * this walks up the tree and applies the various bus mappings on the
1250 * way.
1251 *
1252 * Note: We consider that crossing any level with #size-cells == 0 to mean
1253 * that translation is impossible (that is we are not dealing with a value
1254 * that can be mapped to a cpu physical address). This is not really specified
1255 * that way, but this is traditionally the way IBM at least do things
1256 */
Stephen Warren11e44fc2016-08-05 09:47:50 -06001257static u64 __of_translate_address(const void *blob, int node_offset,
1258 const fdt32_t *in_addr, const char *rprop)
Kumar Galaa0342c02010-06-16 14:27:38 -05001259{
1260 int parent;
1261 struct of_bus *bus, *pbus;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001262 fdt32_t addr[OF_MAX_ADDR_CELLS];
Kumar Galaa0342c02010-06-16 14:27:38 -05001263 int na, ns, pna, pns;
1264 u64 result = OF_BAD_ADDR;
1265
1266 debug("OF: ** translation for device %s **\n",
1267 fdt_get_name(blob, node_offset, NULL));
1268
1269 /* Get parent & match bus type */
1270 parent = fdt_parent_offset(blob, node_offset);
1271 if (parent < 0)
1272 goto bail;
Paul Burton0a222d52016-05-17 07:43:24 +01001273 bus = of_match_bus(blob, parent);
Kumar Galaa0342c02010-06-16 14:27:38 -05001274
1275 /* Cound address cells & copy address locally */
Scott Wood6395f312010-08-12 18:37:39 -05001276 bus->count_cells(blob, parent, &na, &ns);
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +01001277 if (!OF_CHECK_COUNTS(na, ns)) {
Kumar Galaa0342c02010-06-16 14:27:38 -05001278 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1279 fdt_get_name(blob, node_offset, NULL));
1280 goto bail;
1281 }
1282 memcpy(addr, in_addr, na * 4);
1283
1284 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1285 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1286 of_dump_addr("OF: translating address:", addr, na);
1287
1288 /* Translate */
1289 for (;;) {
1290 /* Switch to parent bus */
1291 node_offset = parent;
1292 parent = fdt_parent_offset(blob, node_offset);
1293
1294 /* If root, we have finished */
1295 if (parent < 0) {
1296 debug("OF: reached root node\n");
Simon Glasseed36602017-05-18 20:09:26 -06001297 result = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001298 break;
1299 }
1300
1301 /* Get new parent bus and counts */
Paul Burton0a222d52016-05-17 07:43:24 +01001302 pbus = of_match_bus(blob, parent);
Scott Wood6395f312010-08-12 18:37:39 -05001303 pbus->count_cells(blob, parent, &pna, &pns);
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +01001304 if (!OF_CHECK_COUNTS(pna, pns)) {
Kumar Galaa0342c02010-06-16 14:27:38 -05001305 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1306 fdt_get_name(blob, node_offset, NULL));
1307 break;
1308 }
1309
1310 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1311 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1312
1313 /* Apply bus translation */
1314 if (of_translate_one(blob, node_offset, bus, pbus,
1315 addr, na, ns, pna, rprop))
1316 break;
1317
1318 /* Complete the move up one level */
1319 na = pna;
1320 ns = pns;
1321 bus = pbus;
1322
1323 of_dump_addr("OF: one level translation:", addr, na);
1324 }
1325 bail:
1326
1327 return result;
1328}
1329
Stephen Warren11e44fc2016-08-05 09:47:50 -06001330u64 fdt_translate_address(const void *blob, int node_offset,
1331 const fdt32_t *in_addr)
Kumar Galaa0342c02010-06-16 14:27:38 -05001332{
1333 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1334}
Kumar Gala75e73af2010-07-04 12:48:21 -05001335
Fabien Dessenne641067f2019-05-31 15:11:30 +02001336u64 fdt_translate_dma_address(const void *blob, int node_offset,
1337 const fdt32_t *in_addr)
1338{
1339 return __of_translate_address(blob, node_offset, in_addr, "dma-ranges");
1340}
1341
Kumar Gala75e73af2010-07-04 12:48:21 -05001342/**
1343 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1344 * who's reg property matches a physical cpu address
1345 *
1346 * @blob: ptr to device tree
1347 * @compat: compatiable string to match
1348 * @compat_off: property name
1349 *
1350 */
1351int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1352 phys_addr_t compat_off)
1353{
1354 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1355 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001356 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
Kumar Gala75e73af2010-07-04 12:48:21 -05001357 if (reg) {
1358 if (compat_off == fdt_translate_address(blob, off, reg))
1359 return off;
1360 }
1361 off = fdt_node_offset_by_compatible(blob, off, compat);
1362 }
1363
1364 return -FDT_ERR_NOTFOUND;
1365}
1366
Kumar Galab4b847e2010-07-09 16:18:58 -05001367/**
1368 * fdt_alloc_phandle: Return next free phandle value
1369 *
1370 * @blob: ptr to device tree
1371 */
1372int fdt_alloc_phandle(void *blob)
1373{
Masahiro Yamadab4141192014-11-07 03:03:31 +09001374 int offset;
1375 uint32_t phandle = 0;
Kumar Gala75e73af2010-07-04 12:48:21 -05001376
Kumar Galab4b847e2010-07-09 16:18:58 -05001377 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1378 offset = fdt_next_node(blob, offset, NULL)) {
Timur Tabi50bf17b2011-09-20 18:24:35 -05001379 phandle = max(phandle, fdt_get_phandle(blob, offset));
Kumar Galab4b847e2010-07-09 16:18:58 -05001380 }
1381
1382 return phandle + 1;
1383}
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001384
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001385/*
Kumar Galaf117c0f2011-08-01 00:23:23 -05001386 * fdt_set_phandle: Create a phandle property for the given node
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001387 *
1388 * @fdt: ptr to device tree
1389 * @nodeoffset: node to update
1390 * @phandle: phandle value to set (must be unique)
Kumar Galaf117c0f2011-08-01 00:23:23 -05001391 */
1392int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001393{
1394 int ret;
1395
1396#ifdef DEBUG
1397 int off = fdt_node_offset_by_phandle(fdt, phandle);
1398
1399 if ((off >= 0) && (off != nodeoffset)) {
1400 char buf[64];
1401
1402 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1403 printf("Trying to update node %s with phandle %u ",
1404 buf, phandle);
1405
1406 fdt_get_path(fdt, off, buf, sizeof(buf));
1407 printf("that already exists in node %s.\n", buf);
1408 return -FDT_ERR_BADPHANDLE;
1409 }
1410#endif
1411
1412 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1413 if (ret < 0)
1414 return ret;
1415
1416 /*
1417 * For now, also set the deprecated "linux,phandle" property, so that we
1418 * don't break older kernels.
1419 */
1420 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1421
1422 return ret;
1423}
1424
Kumar Gala10aeabd2011-08-01 00:25:20 -05001425/*
1426 * fdt_create_phandle: Create a phandle property for the given node
1427 *
1428 * @fdt: ptr to device tree
1429 * @nodeoffset: node to update
1430 */
Timur Tabi3c927cc2011-09-20 18:24:34 -05001431unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
Kumar Gala10aeabd2011-08-01 00:25:20 -05001432{
1433 /* see if there is a phandle already */
1434 int phandle = fdt_get_phandle(fdt, nodeoffset);
1435
1436 /* if we got 0, means no phandle so create one */
1437 if (phandle == 0) {
Timur Tabi3c927cc2011-09-20 18:24:34 -05001438 int ret;
1439
Kumar Gala10aeabd2011-08-01 00:25:20 -05001440 phandle = fdt_alloc_phandle(fdt);
Timur Tabi3c927cc2011-09-20 18:24:34 -05001441 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1442 if (ret < 0) {
1443 printf("Can't set phandle %u: %s\n", phandle,
1444 fdt_strerror(ret));
1445 return 0;
1446 }
Kumar Gala10aeabd2011-08-01 00:25:20 -05001447 }
1448
1449 return phandle;
1450}
1451
Shengzhou Liu2a523f52011-10-14 16:26:05 +08001452/*
1453 * fdt_set_node_status: Set status for the given node
1454 *
1455 * @fdt: ptr to device tree
1456 * @nodeoffset: node to update
1457 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1458 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1459 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1460 */
1461int fdt_set_node_status(void *fdt, int nodeoffset,
1462 enum fdt_status status, unsigned int error_code)
1463{
1464 char buf[16];
1465 int ret = 0;
1466
1467 if (nodeoffset < 0)
1468 return nodeoffset;
1469
1470 switch (status) {
1471 case FDT_STATUS_OKAY:
1472 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1473 break;
1474 case FDT_STATUS_DISABLED:
1475 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1476 break;
1477 case FDT_STATUS_FAIL:
1478 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1479 break;
1480 case FDT_STATUS_FAIL_ERROR_CODE:
1481 sprintf(buf, "fail-%d", error_code);
1482 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1483 break;
1484 default:
1485 printf("Invalid fdt status: %x\n", status);
1486 ret = -1;
1487 break;
1488 }
1489
1490 return ret;
1491}
1492
1493/*
1494 * fdt_set_status_by_alias: Set status for the given node given an alias
1495 *
1496 * @fdt: ptr to device tree
1497 * @alias: alias of node to update
1498 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1499 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1500 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1501 */
1502int fdt_set_status_by_alias(void *fdt, const char* alias,
1503 enum fdt_status status, unsigned int error_code)
1504{
1505 int offset = fdt_path_offset(fdt, alias);
1506
1507 return fdt_set_node_status(fdt, offset, status, error_code);
1508}
1509
Tom Wai-Hong Tam096eb3f2012-12-05 14:46:41 +00001510#if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001511int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1512{
1513 int noff;
1514 int ret;
1515
1516 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1517 if (noff != -FDT_ERR_NOTFOUND) {
1518 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1519add_edid:
1520 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1521 if (ret == -FDT_ERR_NOSPACE) {
1522 ret = fdt_increase_size(blob, 512);
1523 if (!ret)
1524 goto add_edid;
1525 else
1526 goto err_size;
1527 } else if (ret < 0) {
1528 printf("Can't add property: %s\n", fdt_strerror(ret));
1529 return ret;
1530 }
1531 }
1532 return 0;
1533err_size:
1534 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1535 return ret;
1536}
1537#endif
Timur Tabibb682002011-05-03 13:24:07 -05001538
1539/*
1540 * Verify the physical address of device tree node for a given alias
1541 *
1542 * This function locates the device tree node of a given alias, and then
1543 * verifies that the physical address of that device matches the given
1544 * parameter. It displays a message if there is a mismatch.
1545 *
1546 * Returns 1 on success, 0 on failure
1547 */
1548int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1549{
1550 const char *path;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001551 const fdt32_t *reg;
Timur Tabibb682002011-05-03 13:24:07 -05001552 int node, len;
1553 u64 dt_addr;
1554
1555 path = fdt_getprop(fdt, anode, alias, NULL);
1556 if (!path) {
1557 /* If there's no such alias, then it's not a failure */
1558 return 1;
1559 }
1560
1561 node = fdt_path_offset(fdt, path);
1562 if (node < 0) {
1563 printf("Warning: device tree alias '%s' points to invalid "
1564 "node %s.\n", alias, path);
1565 return 0;
1566 }
1567
1568 reg = fdt_getprop(fdt, node, "reg", &len);
1569 if (!reg) {
1570 printf("Warning: device tree node '%s' has no address.\n",
1571 path);
1572 return 0;
1573 }
1574
1575 dt_addr = fdt_translate_address(fdt, node, reg);
1576 if (addr != dt_addr) {
Masahiro Yamadadee37fc2018-08-06 20:47:40 +09001577 printf("Warning: U-Boot configured device %s at address %llu,\n"
1578 "but the device tree has it address %llx.\n",
1579 alias, addr, dt_addr);
Timur Tabibb682002011-05-03 13:24:07 -05001580 return 0;
1581 }
1582
1583 return 1;
1584}
1585
1586/*
1587 * Returns the base address of an SOC or PCI node
1588 */
Simon Glassec002112017-05-18 20:09:00 -06001589u64 fdt_get_base_address(const void *fdt, int node)
Timur Tabibb682002011-05-03 13:24:07 -05001590{
1591 int size;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001592 const fdt32_t *prop;
Timur Tabibb682002011-05-03 13:24:07 -05001593
Simon Glass336a4482017-07-04 13:31:20 -06001594 prop = fdt_getprop(fdt, node, "reg", &size);
Timur Tabibb682002011-05-03 13:24:07 -05001595
Masahiro Yamadae3665ba2019-06-27 16:39:57 +09001596 return prop ? fdt_translate_address(fdt, node, prop) : OF_BAD_ADDR;
Timur Tabibb682002011-05-03 13:24:07 -05001597}
Alexander Grafc48e6862014-04-11 17:09:41 +02001598
1599/*
1600 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1601 */
1602static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1603 uint64_t *val, int cells)
1604{
1605 const fdt32_t *prop32 = &prop[cell_off];
Jean-Jacques Hiblotd60ae4c2019-10-22 10:05:22 +02001606 const unaligned_fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];
Alexander Grafc48e6862014-04-11 17:09:41 +02001607
1608 if ((cell_off + cells) > prop_len)
1609 return -FDT_ERR_NOSPACE;
1610
1611 switch (cells) {
1612 case 1:
1613 *val = fdt32_to_cpu(*prop32);
1614 break;
1615 case 2:
1616 *val = fdt64_to_cpu(*prop64);
1617 break;
1618 default:
1619 return -FDT_ERR_NOSPACE;
1620 }
1621
1622 return 0;
1623}
1624
1625/**
1626 * fdt_read_range - Read a node's n'th range property
1627 *
1628 * @fdt: ptr to device tree
1629 * @node: offset of node
1630 * @n: range index
1631 * @child_addr: pointer to storage for the "child address" field
1632 * @addr: pointer to storage for the CPU view translated physical start
1633 * @len: pointer to storage for the range length
1634 *
1635 * Convenience function that reads and interprets a specific range out of
1636 * a number of the "ranges" property array.
1637 */
1638int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1639 uint64_t *addr, uint64_t *len)
1640{
1641 int pnode = fdt_parent_offset(fdt, node);
1642 const fdt32_t *ranges;
1643 int pacells;
1644 int acells;
1645 int scells;
1646 int ranges_len;
1647 int cell = 0;
1648 int r = 0;
1649
1650 /*
1651 * The "ranges" property is an array of
1652 * { <child address> <parent address> <size in child address space> }
1653 *
1654 * All 3 elements can span a diffent number of cells. Fetch their size.
1655 */
1656 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1657 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1658 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1659
1660 /* Now try to get the ranges property */
1661 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1662 if (!ranges)
1663 return -FDT_ERR_NOTFOUND;
1664 ranges_len /= sizeof(uint32_t);
1665
1666 /* Jump to the n'th entry */
1667 cell = n * (pacells + acells + scells);
1668
1669 /* Read <child address> */
1670 if (child_addr) {
1671 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1672 acells);
1673 if (r)
1674 return r;
1675 }
1676 cell += acells;
1677
1678 /* Read <parent address> */
1679 if (addr)
1680 *addr = fdt_translate_address(fdt, node, ranges + cell);
1681 cell += pacells;
1682
1683 /* Read <size in child address space> */
1684 if (len) {
1685 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
1686 if (r)
1687 return r;
1688 }
1689
1690 return 0;
1691}
Hans de Goeded4f495a2014-11-17 15:29:11 +01001692
1693/**
1694 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1695 *
1696 * @fdt: ptr to device tree
1697 * @node: offset of the simplefb node
1698 * @base_address: framebuffer base address
1699 * @width: width in pixels
1700 * @height: height in pixels
1701 * @stride: bytes per line
1702 * @format: pixel format string
1703 *
1704 * Convenience function to fill and enable a simplefb node.
1705 */
1706int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
1707 u32 height, u32 stride, const char *format)
1708{
1709 char name[32];
1710 fdt32_t cells[4];
1711 int i, addrc, sizec, ret;
1712
Simon Glasseed36602017-05-18 20:09:26 -06001713 fdt_support_default_count_cells(fdt, fdt_parent_offset(fdt, node),
1714 &addrc, &sizec);
Hans de Goeded4f495a2014-11-17 15:29:11 +01001715 i = 0;
1716 if (addrc == 2)
1717 cells[i++] = cpu_to_fdt32(base_address >> 32);
1718 cells[i++] = cpu_to_fdt32(base_address);
1719 if (sizec == 2)
1720 cells[i++] = 0;
1721 cells[i++] = cpu_to_fdt32(height * stride);
1722
1723 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
1724 if (ret < 0)
1725 return ret;
1726
Masahiro Yamadadee37fc2018-08-06 20:47:40 +09001727 snprintf(name, sizeof(name), "framebuffer@%llx", base_address);
Hans de Goeded4f495a2014-11-17 15:29:11 +01001728 ret = fdt_set_name(fdt, node, name);
1729 if (ret < 0)
1730 return ret;
1731
1732 ret = fdt_setprop_u32(fdt, node, "width", width);
1733 if (ret < 0)
1734 return ret;
1735
1736 ret = fdt_setprop_u32(fdt, node, "height", height);
1737 if (ret < 0)
1738 return ret;
1739
1740 ret = fdt_setprop_u32(fdt, node, "stride", stride);
1741 if (ret < 0)
1742 return ret;
1743
1744 ret = fdt_setprop_string(fdt, node, "format", format);
1745 if (ret < 0)
1746 return ret;
1747
1748 ret = fdt_setprop_string(fdt, node, "status", "okay");
1749 if (ret < 0)
1750 return ret;
1751
1752 return 0;
1753}
Tim Harvey08daa252015-04-08 11:45:39 -07001754
1755/*
1756 * Update native-mode in display-timings from display environment variable.
1757 * The node to update are specified by path.
1758 */
1759int fdt_fixup_display(void *blob, const char *path, const char *display)
1760{
1761 int off, toff;
1762
1763 if (!display || !path)
1764 return -FDT_ERR_NOTFOUND;
1765
1766 toff = fdt_path_offset(blob, path);
1767 if (toff >= 0)
1768 toff = fdt_subnode_offset(blob, toff, "display-timings");
1769 if (toff < 0)
1770 return toff;
1771
1772 for (off = fdt_first_subnode(blob, toff);
1773 off >= 0;
1774 off = fdt_next_subnode(blob, off)) {
1775 uint32_t h = fdt_get_phandle(blob, off);
1776 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL),
1777 fdt32_to_cpu(h));
1778 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0)
1779 return fdt_setprop_u32(blob, toff, "native-mode", h);
1780 }
1781 return toff;
1782}
Pantelis Antonioufc7c3182017-09-04 23:12:11 +03001783
1784#ifdef CONFIG_OF_LIBFDT_OVERLAY
1785/**
1786 * fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting
1787 *
1788 * @fdt: ptr to device tree
1789 * @fdto: ptr to device tree overlay
1790 *
1791 * Convenience function to apply an overlay and display helpful messages
1792 * in the case of an error
1793 */
1794int fdt_overlay_apply_verbose(void *fdt, void *fdto)
1795{
1796 int err;
1797 bool has_symbols;
1798
1799 err = fdt_path_offset(fdt, "/__symbols__");
1800 has_symbols = err >= 0;
1801
1802 err = fdt_overlay_apply(fdt, fdto);
1803 if (err < 0) {
1804 printf("failed on fdt_overlay_apply(): %s\n",
1805 fdt_strerror(err));
1806 if (!has_symbols) {
1807 printf("base fdt does did not have a /__symbols__ node\n");
1808 printf("make sure you've compiled with -@\n");
1809 }
1810 }
1811 return err;
1812}
1813#endif