blob: baf7924ff6126ede18548c746e28defc65eca635 [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>
Heinrich Schuchardt9ad0a792018-11-18 17:58:51 +010011#include <mapmem.h>
Anton Vorontsov3e303f72009-10-15 17:47:04 +040012#include <stdio_dev.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040013#include <linux/ctype.h>
14#include <linux/types.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040015#include <asm/global_data.h>
Masahiro Yamadab08c8c42018-03-05 01:20:11 +090016#include <linux/libfdt.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040017#include <fdt_support.h>
Kumar Gala151c8b02007-11-26 17:06:15 -060018#include <exports.h>
Bin Menga0ae3802015-12-07 01:39:47 -080019#include <fdtdec.h>
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040020
Kumar Gala3bed2aa2008-10-23 00:05:47 -050021/**
Alexander Graf94fb1822014-04-11 17:09:40 +020022 * fdt_getprop_u32_default_node - Return a node's property or a default
23 *
24 * @fdt: ptr to device tree
25 * @off: offset of node
26 * @cell: cell offset in property
27 * @prop: property name
28 * @dflt: default value if the property isn't found
29 *
30 * Convenience function to return a node's property or a default value if
31 * the property doesn't exist.
32 */
33u32 fdt_getprop_u32_default_node(const void *fdt, int off, int cell,
34 const char *prop, const u32 dflt)
35{
36 const fdt32_t *val;
37 int len;
38
39 val = fdt_getprop(fdt, off, prop, &len);
40
41 /* Check if property exists */
42 if (!val)
43 return dflt;
44
45 /* Check if property is long enough */
46 if (len < ((cell + 1) * sizeof(uint32_t)))
47 return dflt;
48
49 return fdt32_to_cpu(*val);
50}
51
52/**
Kumar Gala3bed2aa2008-10-23 00:05:47 -050053 * fdt_getprop_u32_default - Find a node and return it's property or a default
54 *
55 * @fdt: ptr to device tree
56 * @path: path of node
57 * @prop: property name
58 * @dflt: default value if the property isn't found
59 *
60 * Convenience function to find a node and return it's property or a
61 * default value if it doesn't exist.
62 */
Gabe Black07e12782011-11-08 01:09:44 -080063u32 fdt_getprop_u32_default(const void *fdt, const char *path,
64 const char *prop, const u32 dflt)
Kumar Gala3bed2aa2008-10-23 00:05:47 -050065{
Kumar Gala3bed2aa2008-10-23 00:05:47 -050066 int off;
67
68 off = fdt_path_offset(fdt, path);
69 if (off < 0)
70 return dflt;
71
Alexander Graf94fb1822014-04-11 17:09:40 +020072 return fdt_getprop_u32_default_node(fdt, off, 0, prop, dflt);
Kumar Gala3bed2aa2008-10-23 00:05:47 -050073}
Gerald Van Baren64dbbd42007-04-06 14:19:43 -040074
Kumar Galaa3c29332007-10-24 10:21:57 -050075/**
76 * fdt_find_and_setprop: Find a node and set it's property
77 *
78 * @fdt: ptr to device tree
79 * @node: path of node
80 * @prop: property name
81 * @val: ptr to new value
82 * @len: length of new property value
83 * @create: flag to create the property if it doesn't exist
84 *
85 * Convenience function to directly set a property given the path to the node.
86 */
87int fdt_find_and_setprop(void *fdt, const char *node, const char *prop,
88 const void *val, int len, int create)
89{
Kumar Gala8d04f022007-10-24 11:04:22 -050090 int nodeoff = fdt_path_offset(fdt, node);
Kumar Galaa3c29332007-10-24 10:21:57 -050091
92 if (nodeoff < 0)
93 return nodeoff;
94
Kim Phillips8aa5ec62013-01-16 14:00:11 +000095 if ((!create) && (fdt_get_property(fdt, nodeoff, prop, NULL) == NULL))
Kumar Galaa3c29332007-10-24 10:21:57 -050096 return 0; /* create flag not set; so exit quietly */
97
98 return fdt_setprop(fdt, nodeoff, prop, val, len);
99}
100
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900101/**
Simon Glassa9e8e292014-10-23 18:58:49 -0600102 * fdt_find_or_add_subnode() - find or possibly add a subnode of a given node
103 *
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900104 * @fdt: pointer to the device tree blob
105 * @parentoffset: structure block offset of a node
106 * @name: name of the subnode to locate
107 *
108 * fdt_subnode_offset() finds a subnode of the node with a given name.
109 * If the subnode does not exist, it will be created.
110 */
Simon Glassa9e8e292014-10-23 18:58:49 -0600111int fdt_find_or_add_subnode(void *fdt, int parentoffset, const char *name)
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900112{
113 int offset;
114
115 offset = fdt_subnode_offset(fdt, parentoffset, name);
116
117 if (offset == -FDT_ERR_NOTFOUND)
118 offset = fdt_add_subnode(fdt, parentoffset, name);
119
120 if (offset < 0)
121 printf("%s: %s: %s\n", __func__, name, fdt_strerror(offset));
122
123 return offset;
124}
125
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900126/* rename to CONFIG_OF_STDOUT_PATH ? */
127#if defined(OF_STDOUT_PATH)
128static int fdt_fixup_stdout(void *fdt, int chosenoff)
129{
130 return fdt_setprop(fdt, chosenoff, "linux,stdout-path",
131 OF_STDOUT_PATH, strlen(OF_STDOUT_PATH) + 1);
132}
133#elif defined(CONFIG_OF_STDOUT_VIA_ALIAS) && defined(CONFIG_CONS_INDEX)
Detlev Zundel40777812008-06-20 22:24:05 +0200134static int fdt_fixup_stdout(void *fdt, int chosenoff)
Kumar Gala151c8b02007-11-26 17:06:15 -0600135{
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900136 int err;
137 int aliasoff;
Kumar Gala151c8b02007-11-26 17:06:15 -0600138 char sername[9] = { 0 };
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900139 const void *path;
140 int len;
141 char tmp[256]; /* long enough */
Kumar Gala151c8b02007-11-26 17:06:15 -0600142
Bin Meng9f29aeb2016-01-13 19:38:58 -0800143 sprintf(sername, "serial%d", CONFIG_CONS_INDEX - 1);
Kumar Gala151c8b02007-11-26 17:06:15 -0600144
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900145 aliasoff = fdt_path_offset(fdt, "/aliases");
146 if (aliasoff < 0) {
147 err = aliasoff;
Scott Woodda77c812015-09-01 22:48:08 -0500148 goto noalias;
Kumar Gala151c8b02007-11-26 17:06:15 -0600149 }
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900150
151 path = fdt_getprop(fdt, aliasoff, sername, &len);
152 if (!path) {
153 err = len;
Scott Woodda77c812015-09-01 22:48:08 -0500154 goto noalias;
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900155 }
156
157 /* fdt_setprop may break "path" so we copy it to tmp buffer */
158 memcpy(tmp, path, len);
159
160 err = fdt_setprop(fdt, chosenoff, "linux,stdout-path", tmp, len);
Kumar Gala151c8b02007-11-26 17:06:15 -0600161 if (err < 0)
162 printf("WARNING: could not set linux,stdout-path %s.\n",
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900163 fdt_strerror(err));
Kumar Gala151c8b02007-11-26 17:06:15 -0600164
165 return err;
Scott Woodda77c812015-09-01 22:48:08 -0500166
167noalias:
168 printf("WARNING: %s: could not read %s alias: %s\n",
169 __func__, sername, fdt_strerror(err));
170
171 return 0;
Kumar Gala151c8b02007-11-26 17:06:15 -0600172}
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900173#else
174static int fdt_fixup_stdout(void *fdt, int chosenoff)
175{
176 return 0;
177}
Kumar Gala151c8b02007-11-26 17:06:15 -0600178#endif
179
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900180static inline int fdt_setprop_uxx(void *fdt, int nodeoffset, const char *name,
181 uint64_t val, int is_u64)
182{
183 if (is_u64)
184 return fdt_setprop_u64(fdt, nodeoffset, name, val);
185 else
186 return fdt_setprop_u32(fdt, nodeoffset, name, (uint32_t)val);
187}
188
Paul Kocialkowski10be5b52015-05-21 11:27:03 +0200189int fdt_root(void *fdt)
190{
191 char *serial;
192 int err;
193
194 err = fdt_check_header(fdt);
195 if (err < 0) {
196 printf("fdt_root: %s\n", fdt_strerror(err));
197 return err;
198 }
199
Simon Glass00caae62017-08-03 12:22:12 -0600200 serial = env_get("serial#");
Paul Kocialkowski10be5b52015-05-21 11:27:03 +0200201 if (serial) {
202 err = fdt_setprop(fdt, 0, "serial-number", serial,
203 strlen(serial) + 1);
204
205 if (err < 0) {
206 printf("WARNING: could not set serial-number %s.\n",
207 fdt_strerror(err));
208 return err;
209 }
210 }
211
212 return 0;
213}
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900214
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900215int fdt_initrd(void *fdt, ulong initrd_start, ulong initrd_end)
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500216{
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900217 int nodeoffset;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500218 int err, j, total;
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900219 int is_u64;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500220 uint64_t addr, size;
221
Masahiro Yamada50babaf2014-04-18 17:41:05 +0900222 /* just return if the size of initrd is zero */
223 if (initrd_start == initrd_end)
224 return 0;
225
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900226 /* find or create "/chosen" node. */
227 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
228 if (nodeoffset < 0)
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500229 return nodeoffset;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500230
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500231 total = fdt_num_mem_rsv(fdt);
232
233 /*
234 * Look for an existing entry and update it. If we don't find
235 * the entry, we will j be the next available slot.
236 */
237 for (j = 0; j < total; j++) {
238 err = fdt_get_mem_rsv(fdt, j, &addr, &size);
239 if (addr == initrd_start) {
240 fdt_del_mem_rsv(fdt, j);
241 break;
242 }
243 }
244
Grant Likelyce6b27a2011-03-28 09:58:55 +0000245 err = fdt_add_mem_rsv(fdt, initrd_start, initrd_end - initrd_start);
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500246 if (err < 0) {
247 printf("fdt_initrd: %s\n", fdt_strerror(err));
248 return err;
249 }
250
Simon Glass933cdbb2014-10-23 18:58:57 -0600251 is_u64 = (fdt_address_cells(fdt, 0) == 2);
David Fengf77a6062013-12-14 11:47:29 +0800252
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900253 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-start",
254 (uint64_t)initrd_start, is_u64);
255
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900256 if (err < 0) {
257 printf("WARNING: could not set linux,initrd-start %s.\n",
258 fdt_strerror(err));
259 return err;
260 }
Masahiro Yamadaf18295d2014-04-18 17:41:04 +0900261
262 err = fdt_setprop_uxx(fdt, nodeoffset, "linux,initrd-end",
263 (uint64_t)initrd_end, is_u64);
264
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900265 if (err < 0) {
266 printf("WARNING: could not set linux,initrd-end %s.\n",
267 fdt_strerror(err));
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500268
Masahiro Yamadadbe963a2014-04-18 17:40:59 +0900269 return err;
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500270 }
271
272 return 0;
273}
274
Masahiro Yamadabc6ed0f2014-04-18 17:41:00 +0900275int fdt_chosen(void *fdt)
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400276{
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400277 int nodeoffset;
278 int err;
Gerald Van Baren35ec3982007-05-25 22:08:57 -0400279 char *str; /* used to set string properties */
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400280
281 err = fdt_check_header(fdt);
282 if (err < 0) {
Gerald Van Baren5fe6be62007-08-07 21:14:22 -0400283 printf("fdt_chosen: %s\n", fdt_strerror(err));
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400284 return err;
285 }
286
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900287 /* find or create "/chosen" node. */
288 nodeoffset = fdt_find_or_add_subnode(fdt, 0, "chosen");
289 if (nodeoffset < 0)
290 return nodeoffset;
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400291
Simon Glass00caae62017-08-03 12:22:12 -0600292 str = env_get("bootargs");
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900293 if (str) {
294 err = fdt_setprop(fdt, nodeoffset, "bootargs", str,
295 strlen(str) + 1);
296 if (err < 0) {
Masahiro Yamadabc6ed0f2014-04-18 17:41:00 +0900297 printf("WARNING: could not set bootargs %s.\n",
298 fdt_strerror(err));
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900299 return err;
300 }
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400301 }
Kumar Gala2a1a2cb2008-08-15 08:24:43 -0500302
Masahiro Yamada972f2a82014-04-18 17:41:01 +0900303 return fdt_fixup_stdout(fdt, nodeoffset);
Gerald Van Baren64dbbd42007-04-06 14:19:43 -0400304}
305
Kumar Galae93becf2007-11-03 19:46:28 -0500306void do_fixup_by_path(void *fdt, const char *path, const char *prop,
307 const void *val, int len, int create)
308{
309#if defined(DEBUG)
310 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600311 debug("Updating property '%s/%s' = ", path, prop);
Kumar Galae93becf2007-11-03 19:46:28 -0500312 for (i = 0; i < len; i++)
313 debug(" %.2x", *(u8*)(val+i));
314 debug("\n");
315#endif
316 int rc = fdt_find_and_setprop(fdt, path, prop, val, len, create);
317 if (rc)
318 printf("Unable to update property %s:%s, err=%s\n",
319 path, prop, fdt_strerror(rc));
320}
321
322void do_fixup_by_path_u32(void *fdt, const char *path, const char *prop,
323 u32 val, int create)
324{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000325 fdt32_t tmp = cpu_to_fdt32(val);
326 do_fixup_by_path(fdt, path, prop, &tmp, sizeof(tmp), create);
Kumar Galae93becf2007-11-03 19:46:28 -0500327}
328
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600329void do_fixup_by_prop(void *fdt,
330 const char *pname, const void *pval, int plen,
331 const char *prop, const void *val, int len,
332 int create)
333{
334 int off;
335#if defined(DEBUG)
336 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600337 debug("Updating property '%s' = ", prop);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600338 for (i = 0; i < len; i++)
339 debug(" %.2x", *(u8*)(val+i));
340 debug("\n");
341#endif
342 off = fdt_node_offset_by_prop_value(fdt, -1, pname, pval, plen);
343 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000344 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600345 fdt_setprop(fdt, off, prop, val, len);
346 off = fdt_node_offset_by_prop_value(fdt, off, pname, pval, plen);
347 }
348}
349
350void do_fixup_by_prop_u32(void *fdt,
351 const char *pname, const void *pval, int plen,
352 const char *prop, u32 val, int create)
353{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000354 fdt32_t tmp = cpu_to_fdt32(val);
355 do_fixup_by_prop(fdt, pname, pval, plen, prop, &tmp, 4, create);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600356}
357
358void do_fixup_by_compat(void *fdt, const char *compat,
359 const char *prop, const void *val, int len, int create)
360{
361 int off = -1;
362#if defined(DEBUG)
363 int i;
Kumar Galad9ad1152008-02-13 15:09:58 -0600364 debug("Updating property '%s' = ", prop);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600365 for (i = 0; i < len; i++)
366 debug(" %.2x", *(u8*)(val+i));
367 debug("\n");
368#endif
369 off = fdt_node_offset_by_compatible(fdt, -1, compat);
370 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000371 if (create || (fdt_get_property(fdt, off, prop, NULL) != NULL))
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600372 fdt_setprop(fdt, off, prop, val, len);
373 off = fdt_node_offset_by_compatible(fdt, off, compat);
374 }
375}
376
377void do_fixup_by_compat_u32(void *fdt, const char *compat,
378 const char *prop, u32 val, int create)
379{
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000380 fdt32_t tmp = cpu_to_fdt32(val);
381 do_fixup_by_compat(fdt, compat, prop, &tmp, 4, create);
Kumar Gala9eb77ce2007-11-21 13:30:15 -0600382}
383
Masahiro Yamada63c09412016-11-26 11:02:10 +0900384#ifdef CONFIG_ARCH_FIXUP_FDT_MEMORY
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900385/*
386 * fdt_pack_reg - pack address and size array into the "reg"-suitable stream
387 */
Simon Glass41f09bb2014-10-23 18:58:55 -0600388static int fdt_pack_reg(const void *fdt, void *buf, u64 *address, u64 *size,
389 int n)
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900390{
391 int i;
Hans de Goedeffccb842014-11-28 14:23:51 +0100392 int address_cells = fdt_address_cells(fdt, 0);
393 int size_cells = fdt_size_cells(fdt, 0);
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900394 char *p = buf;
395
396 for (i = 0; i < n; i++) {
Hans de Goedeffccb842014-11-28 14:23:51 +0100397 if (address_cells == 2)
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900398 *(fdt64_t *)p = cpu_to_fdt64(address[i]);
399 else
400 *(fdt32_t *)p = cpu_to_fdt32(address[i]);
Hans de Goedeffccb842014-11-28 14:23:51 +0100401 p += 4 * address_cells;
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900402
Hans de Goedeffccb842014-11-28 14:23:51 +0100403 if (size_cells == 2)
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900404 *(fdt64_t *)p = cpu_to_fdt64(size[i]);
405 else
406 *(fdt32_t *)p = cpu_to_fdt32(size[i]);
Hans de Goedeffccb842014-11-28 14:23:51 +0100407 p += 4 * size_cells;
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900408 }
409
410 return p - (char *)buf;
411}
412
Ramon Fried6b6f2162018-08-14 00:35:42 +0300413#if CONFIG_NR_DRAM_BANKS > 4
414#define MEMORY_BANKS_MAX CONFIG_NR_DRAM_BANKS
415#else
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000416#define MEMORY_BANKS_MAX 4
Ramon Fried6b6f2162018-08-14 00:35:42 +0300417#endif
John Rigbya6bd9e82010-10-13 13:57:33 -0600418int fdt_fixup_memory_banks(void *blob, u64 start[], u64 size[], int banks)
419{
420 int err, nodeoffset;
Thierry Reding6d29cc72018-01-30 11:34:17 +0100421 int len, i;
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000422 u8 tmp[MEMORY_BANKS_MAX * 16]; /* Up to 64-bit address + 64-bit size */
Kumar Gala3c927282007-11-26 14:57:45 -0600423
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000424 if (banks > MEMORY_BANKS_MAX) {
425 printf("%s: num banks %d exceeds hardcoded limit %d."
426 " Recompile with higher MEMORY_BANKS_MAX?\n",
427 __FUNCTION__, banks, MEMORY_BANKS_MAX);
428 return -1;
429 }
430
Kumar Gala3c927282007-11-26 14:57:45 -0600431 err = fdt_check_header(blob);
432 if (err < 0) {
433 printf("%s: %s\n", __FUNCTION__, fdt_strerror(err));
434 return err;
435 }
436
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900437 /* find or create "/memory" node. */
438 nodeoffset = fdt_find_or_add_subnode(blob, 0, "memory");
439 if (nodeoffset < 0)
Miao Yan35940de2013-11-28 17:51:39 +0800440 return nodeoffset;
Masahiro Yamada8edb2192014-04-18 17:40:58 +0900441
Kumar Gala3c927282007-11-26 14:57:45 -0600442 err = fdt_setprop(blob, nodeoffset, "device_type", "memory",
443 sizeof("memory"));
444 if (err < 0) {
445 printf("WARNING: could not set %s %s.\n", "device_type",
446 fdt_strerror(err));
447 return err;
448 }
449
Thierry Redinged5af032018-02-15 19:05:59 +0100450 for (i = 0; i < banks; i++) {
451 if (start[i] == 0 && size[i] == 0)
452 break;
453 }
454
455 banks = i;
456
Andre Przywara5c1cf892015-06-21 00:29:54 +0100457 if (!banks)
458 return 0;
459
Masahiro Yamada739a01e2014-04-18 17:41:03 +0900460 len = fdt_pack_reg(blob, tmp, start, size, banks);
Kumar Gala3c927282007-11-26 14:57:45 -0600461
462 err = fdt_setprop(blob, nodeoffset, "reg", tmp, len);
463 if (err < 0) {
464 printf("WARNING: could not set %s %s.\n",
465 "reg", fdt_strerror(err));
466 return err;
467 }
468 return 0;
469}
Masahiro Yamada63c09412016-11-26 11:02:10 +0900470#endif
Kumar Gala3c927282007-11-26 14:57:45 -0600471
John Rigbya6bd9e82010-10-13 13:57:33 -0600472int fdt_fixup_memory(void *blob, u64 start, u64 size)
473{
474 return fdt_fixup_memory_banks(blob, &start, &size, 1);
475}
476
Kumar Galaba37aa02008-08-19 15:41:18 -0500477void fdt_fixup_ethernet(void *fdt)
Kumar Galaab544632007-11-21 11:11:03 -0600478{
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530479 int i = 0, j, prop;
Bin Mengbc393a72015-11-03 04:24:41 -0800480 char *tmp, *end;
Stephen Warren064d55f2013-05-27 18:01:19 +0000481 char mac[16];
Kumar Galaab544632007-11-21 11:11:03 -0600482 const char *path;
oliver@schinagl.nla40db6d2016-11-25 16:30:19 +0100483 unsigned char mac_addr[ARP_HLEN];
Bin Mengbc393a72015-11-03 04:24:41 -0800484 int offset;
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530485#ifdef FDT_SEQ_MACADDR_FROM_ENV
486 int nodeoff;
487 const struct fdt_property *fdt_prop;
488#endif
Kumar Galaab544632007-11-21 11:11:03 -0600489
Lev Iserovicha434fd12016-01-07 18:04:16 -0500490 if (fdt_path_offset(fdt, "/aliases") < 0)
Kumar Galaba37aa02008-08-19 15:41:18 -0500491 return;
492
Lev Iserovicha434fd12016-01-07 18:04:16 -0500493 /* Cycle through all aliases */
494 for (prop = 0; ; prop++) {
Bin Mengbc393a72015-11-03 04:24:41 -0800495 const char *name;
Bin Mengbc393a72015-11-03 04:24:41 -0800496
Lev Iserovicha434fd12016-01-07 18:04:16 -0500497 /* FDT might have been edited, recompute the offset */
498 offset = fdt_first_property_offset(fdt,
499 fdt_path_offset(fdt, "/aliases"));
500 /* Select property number 'prop' */
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530501 for (j = 0; j < prop; j++)
Lev Iserovicha434fd12016-01-07 18:04:16 -0500502 offset = fdt_next_property_offset(fdt, offset);
503
504 if (offset < 0)
505 break;
506
Bin Mengbc393a72015-11-03 04:24:41 -0800507 path = fdt_getprop_by_offset(fdt, offset, &name, NULL);
Tuomas Tynkkynenf8e57c62017-03-20 10:04:55 +0200508 if (!strncmp(name, "ethernet", 8)) {
509 /* Treat plain "ethernet" same as "ethernet0". */
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530510 if (!strcmp(name, "ethernet")
511#ifdef FDT_SEQ_MACADDR_FROM_ENV
512 || !strcmp(name, "ethernet0")
513#endif
514 )
Tuomas Tynkkynenf8e57c62017-03-20 10:04:55 +0200515 i = 0;
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530516#ifndef FDT_SEQ_MACADDR_FROM_ENV
Tuomas Tynkkynenf8e57c62017-03-20 10:04:55 +0200517 else
518 i = trailing_strtol(name);
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530519#endif
Bin Mengbc393a72015-11-03 04:24:41 -0800520 if (i != -1) {
521 if (i == 0)
522 strcpy(mac, "ethaddr");
523 else
524 sprintf(mac, "eth%daddr", i);
525 } else {
526 continue;
527 }
Prabhakar Kushwaha24acb832017-11-23 16:51:32 +0530528#ifdef FDT_SEQ_MACADDR_FROM_ENV
529 nodeoff = fdt_path_offset(fdt, path);
530 fdt_prop = fdt_get_property(fdt, nodeoff, "status",
531 NULL);
532 if (fdt_prop && !strcmp(fdt_prop->data, "disabled"))
533 continue;
534 i++;
535#endif
Simon Glass00caae62017-08-03 12:22:12 -0600536 tmp = env_get(mac);
Bin Mengbc393a72015-11-03 04:24:41 -0800537 if (!tmp)
538 continue;
539
540 for (j = 0; j < 6; j++) {
541 mac_addr[j] = tmp ?
542 simple_strtoul(tmp, &end, 16) : 0;
543 if (tmp)
544 tmp = (*end) ? end + 1 : end;
545 }
546
547 do_fixup_by_path(fdt, path, "mac-address",
548 &mac_addr, 6, 0);
549 do_fixup_by_path(fdt, path, "local-mac-address",
550 &mac_addr, 6, 1);
Dan Murphyb1f49ab2013-10-02 14:00:15 -0500551 }
Kumar Galaab544632007-11-21 11:11:03 -0600552 }
553}
Anton Vorontsov18e69a32008-03-14 23:20:18 +0300554
Philipp Tomsicha5af51a2018-02-02 12:01:44 +0100555int fdt_record_loadable(void *blob, u32 index, const char *name,
556 uintptr_t load_addr, u32 size, uintptr_t entry_point,
557 const char *type, const char *os)
558{
559 int err, node;
560
561 err = fdt_check_header(blob);
562 if (err < 0) {
563 printf("%s: %s\n", __func__, fdt_strerror(err));
564 return err;
565 }
566
567 /* find or create "/fit-images" node */
568 node = fdt_find_or_add_subnode(blob, 0, "fit-images");
569 if (node < 0)
570 return node;
571
572 /* find or create "/fit-images/<name>" node */
573 node = fdt_find_or_add_subnode(blob, node, name);
574 if (node < 0)
575 return node;
576
577 /*
578 * We record these as 32bit entities, possibly truncating addresses.
579 * However, spl_fit.c is not 64bit safe either: i.e. we should not
580 * have an issue here.
581 */
582 fdt_setprop_u32(blob, node, "load-addr", load_addr);
583 if (entry_point != -1)
584 fdt_setprop_u32(blob, node, "entry-point", entry_point);
585 fdt_setprop_u32(blob, node, "size", size);
586 if (type)
587 fdt_setprop_string(blob, node, "type", type);
588 if (os)
589 fdt_setprop_string(blob, node, "os", os);
590
591 return node;
592}
593
Kumar Gala3082d232008-08-15 08:24:42 -0500594/* Resize the fdt to its actual size + a bit of padding */
Hannes Schmelzeref476832016-09-20 18:10:43 +0200595int fdt_shrink_to_minimum(void *blob, uint extrasize)
Kumar Gala3082d232008-08-15 08:24:42 -0500596{
597 int i;
598 uint64_t addr, size;
599 int total, ret;
600 uint actualsize;
Simon Goldschmidt59bd7962019-05-03 21:19:03 +0200601 int fdt_memrsv = 0;
Kumar Gala3082d232008-08-15 08:24:42 -0500602
603 if (!blob)
604 return 0;
605
606 total = fdt_num_mem_rsv(blob);
607 for (i = 0; i < total; i++) {
608 fdt_get_mem_rsv(blob, i, &addr, &size);
Simon Glass92549352011-09-17 06:48:58 +0000609 if (addr == (uintptr_t)blob) {
Kumar Gala3082d232008-08-15 08:24:42 -0500610 fdt_del_mem_rsv(blob, i);
Simon Goldschmidt59bd7962019-05-03 21:19:03 +0200611 fdt_memrsv = 1;
Kumar Gala3082d232008-08-15 08:24:42 -0500612 break;
613 }
614 }
615
Peter Korsgaardf242a082008-10-28 08:26:52 +0100616 /*
617 * Calculate the actual size of the fdt
Feng Wang3840ebf2010-08-03 16:22:43 +0200618 * plus the size needed for 5 fdt_add_mem_rsv, one
619 * for the fdt itself and 4 for a possible initrd
620 * ((initrd-start + initrd-end) * 2 (name & value))
Peter Korsgaardf242a082008-10-28 08:26:52 +0100621 */
Kumar Gala3082d232008-08-15 08:24:42 -0500622 actualsize = fdt_off_dt_strings(blob) +
Feng Wang3840ebf2010-08-03 16:22:43 +0200623 fdt_size_dt_strings(blob) + 5 * sizeof(struct fdt_reserve_entry);
Kumar Gala3082d232008-08-15 08:24:42 -0500624
Hannes Schmelzeref476832016-09-20 18:10:43 +0200625 actualsize += extrasize;
Kumar Gala3082d232008-08-15 08:24:42 -0500626 /* Make it so the fdt ends on a page boundary */
Simon Glass92549352011-09-17 06:48:58 +0000627 actualsize = ALIGN(actualsize + ((uintptr_t)blob & 0xfff), 0x1000);
628 actualsize = actualsize - ((uintptr_t)blob & 0xfff);
Kumar Gala3082d232008-08-15 08:24:42 -0500629
630 /* Change the fdt header to reflect the correct size */
631 fdt_set_totalsize(blob, actualsize);
632
Simon Goldschmidt59bd7962019-05-03 21:19:03 +0200633 if (fdt_memrsv) {
634 /* Add the new reservation */
635 ret = fdt_add_mem_rsv(blob, map_to_sysmem(blob), actualsize);
636 if (ret < 0)
637 return ret;
638 }
Kumar Gala3082d232008-08-15 08:24:42 -0500639
640 return actualsize;
641}
Kumar Gala8ab451c2008-10-22 23:33:56 -0500642
643#ifdef CONFIG_PCI
Kumar Galacfd700b2009-08-05 09:03:54 -0500644#define CONFIG_SYS_PCI_NR_INBOUND_WIN 4
Kumar Gala8ab451c2008-10-22 23:33:56 -0500645
646#define FDT_PCI_PREFETCH (0x40000000)
647#define FDT_PCI_MEM32 (0x02000000)
648#define FDT_PCI_IO (0x01000000)
649#define FDT_PCI_MEM64 (0x03000000)
650
651int fdt_pci_dma_ranges(void *blob, int phb_off, struct pci_controller *hose) {
652
653 int addrcell, sizecell, len, r;
654 u32 *dma_range;
655 /* sized based on pci addr cells, size-cells, & address-cells */
656 u32 dma_ranges[(3 + 2 + 2) * CONFIG_SYS_PCI_NR_INBOUND_WIN];
657
658 addrcell = fdt_getprop_u32_default(blob, "/", "#address-cells", 1);
659 sizecell = fdt_getprop_u32_default(blob, "/", "#size-cells", 1);
660
661 dma_range = &dma_ranges[0];
662 for (r = 0; r < hose->region_count; r++) {
663 u64 bus_start, phys_start, size;
664
Kumar Galaff4e66e2009-02-06 09:49:31 -0600665 /* skip if !PCI_REGION_SYS_MEMORY */
666 if (!(hose->regions[r].flags & PCI_REGION_SYS_MEMORY))
Kumar Gala8ab451c2008-10-22 23:33:56 -0500667 continue;
668
669 bus_start = (u64)hose->regions[r].bus_start;
670 phys_start = (u64)hose->regions[r].phys_start;
671 size = (u64)hose->regions[r].size;
672
673 dma_range[0] = 0;
Kumar Galacfd700b2009-08-05 09:03:54 -0500674 if (size >= 0x100000000ull)
Marek Vasut867aaf62019-07-09 02:49:29 +0200675 dma_range[0] |= cpu_to_fdt32(FDT_PCI_MEM64);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500676 else
Marek Vasut867aaf62019-07-09 02:49:29 +0200677 dma_range[0] |= cpu_to_fdt32(FDT_PCI_MEM32);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500678 if (hose->regions[r].flags & PCI_REGION_PREFETCH)
Marek Vasut867aaf62019-07-09 02:49:29 +0200679 dma_range[0] |= cpu_to_fdt32(FDT_PCI_PREFETCH);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500680#ifdef CONFIG_SYS_PCI_64BIT
Marek Vasut867aaf62019-07-09 02:49:29 +0200681 dma_range[1] = cpu_to_fdt32(bus_start >> 32);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500682#else
683 dma_range[1] = 0;
684#endif
Marek Vasut867aaf62019-07-09 02:49:29 +0200685 dma_range[2] = cpu_to_fdt32(bus_start & 0xffffffff);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500686
687 if (addrcell == 2) {
Marek Vasut867aaf62019-07-09 02:49:29 +0200688 dma_range[3] = cpu_to_fdt32(phys_start >> 32);
689 dma_range[4] = cpu_to_fdt32(phys_start & 0xffffffff);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500690 } else {
Marek Vasut867aaf62019-07-09 02:49:29 +0200691 dma_range[3] = cpu_to_fdt32(phys_start & 0xffffffff);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500692 }
693
694 if (sizecell == 2) {
Marek Vasut867aaf62019-07-09 02:49:29 +0200695 dma_range[3 + addrcell + 0] =
696 cpu_to_fdt32(size >> 32);
697 dma_range[3 + addrcell + 1] =
698 cpu_to_fdt32(size & 0xffffffff);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500699 } else {
Marek Vasut867aaf62019-07-09 02:49:29 +0200700 dma_range[3 + addrcell + 0] =
701 cpu_to_fdt32(size & 0xffffffff);
Kumar Gala8ab451c2008-10-22 23:33:56 -0500702 }
703
704 dma_range += (3 + addrcell + sizecell);
705 }
706
707 len = dma_range - &dma_ranges[0];
708 if (len)
709 fdt_setprop(blob, phb_off, "dma-ranges", &dma_ranges[0], len*4);
710
711 return 0;
712}
713#endif
Stefan Roese30d45c02009-10-21 11:59:52 +0200714
Matthew McClintockcb2707a2010-10-13 13:39:26 +0200715int fdt_increase_size(void *fdt, int add_len)
716{
717 int newlen;
718
719 newlen = fdt_totalsize(fdt) + add_len;
720
721 /* Open in place with a new len */
722 return fdt_open_into(fdt, fdt, newlen);
723}
724
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100725#ifdef CONFIG_FDT_FIXUP_PARTITIONS
726#include <jffs2/load_kernel.h>
727#include <mtd_node.h>
728
Michal Simekcd1457d2018-07-31 14:31:04 +0200729static int fdt_del_subnodes(const void *blob, int parent_offset)
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100730{
731 int off, ndepth;
732 int ret;
733
734 for (ndepth = 0, off = fdt_next_node(blob, parent_offset, &ndepth);
735 (off >= 0) && (ndepth > 0);
736 off = fdt_next_node(blob, off, &ndepth)) {
737 if (ndepth == 1) {
738 debug("delete %s: offset: %x\n",
739 fdt_get_name(blob, off, 0), off);
740 ret = fdt_del_node((void *)blob, off);
741 if (ret < 0) {
742 printf("Can't delete node: %s\n",
743 fdt_strerror(ret));
744 return ret;
745 } else {
746 ndepth = 0;
747 off = parent_offset;
748 }
749 }
750 }
751 return 0;
752}
753
Michal Simekcd1457d2018-07-31 14:31:04 +0200754static int fdt_del_partitions(void *blob, int parent_offset)
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100755{
756 const void *prop;
757 int ndepth = 0;
758 int off;
759 int ret;
760
761 off = fdt_next_node(blob, parent_offset, &ndepth);
762 if (off > 0 && ndepth == 1) {
763 prop = fdt_getprop(blob, off, "label", NULL);
764 if (prop == NULL) {
765 /*
766 * Could not find label property, nand {}; node?
767 * Check subnode, delete partitions there if any.
768 */
769 return fdt_del_partitions(blob, off);
770 } else {
771 ret = fdt_del_subnodes(blob, parent_offset);
772 if (ret < 0) {
773 printf("Can't remove subnodes: %s\n",
774 fdt_strerror(ret));
775 return ret;
776 }
777 }
778 }
779 return 0;
780}
781
782int fdt_node_set_part_info(void *blob, int parent_offset,
783 struct mtd_device *dev)
784{
785 struct list_head *pentry;
786 struct part_info *part;
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100787 int off, ndepth = 0;
788 int part_num, ret;
Stefan Mavrodiev3a9a62a2019-04-24 08:31:54 +0300789 int sizecell;
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100790 char buf[64];
791
792 ret = fdt_del_partitions(blob, parent_offset);
793 if (ret < 0)
794 return ret;
795
796 /*
Stefan Mavrodiev3a9a62a2019-04-24 08:31:54 +0300797 * Check if size/address is 1 or 2 cells.
798 * We assume #address-cells and #size-cells have same value.
799 */
800 sizecell = fdt_getprop_u32_default_node(blob, parent_offset,
801 0, "#size-cells", 1);
802
803 /*
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100804 * Check if it is nand {}; subnode, adjust
805 * the offset in this case
806 */
807 off = fdt_next_node(blob, parent_offset, &ndepth);
808 if (off > 0 && ndepth == 1)
809 parent_offset = off;
810
811 part_num = 0;
812 list_for_each_prev(pentry, &dev->parts) {
813 int newoff;
814
815 part = list_entry(pentry, struct part_info, link);
816
Scott Wood06503f12013-10-15 17:41:27 -0500817 debug("%2d: %-20s0x%08llx\t0x%08llx\t%d\n",
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100818 part_num, part->name, part->size,
819 part->offset, part->mask_flags);
820
Scott Wood06503f12013-10-15 17:41:27 -0500821 sprintf(buf, "partition@%llx", part->offset);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100822add_sub:
823 ret = fdt_add_subnode(blob, parent_offset, buf);
824 if (ret == -FDT_ERR_NOSPACE) {
825 ret = fdt_increase_size(blob, 512);
826 if (!ret)
827 goto add_sub;
828 else
829 goto err_size;
830 } else if (ret < 0) {
831 printf("Can't add partition node: %s\n",
832 fdt_strerror(ret));
833 return ret;
834 }
835 newoff = ret;
836
837 /* Check MTD_WRITEABLE_CMD flag */
838 if (part->mask_flags & 1) {
839add_ro:
840 ret = fdt_setprop(blob, newoff, "read_only", NULL, 0);
841 if (ret == -FDT_ERR_NOSPACE) {
842 ret = fdt_increase_size(blob, 512);
843 if (!ret)
844 goto add_ro;
845 else
846 goto err_size;
847 } else if (ret < 0)
848 goto err_prop;
849 }
850
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100851add_reg:
Stefan Mavrodiev3a9a62a2019-04-24 08:31:54 +0300852 if (sizecell == 2) {
853 ret = fdt_setprop_u64(blob, newoff,
854 "reg", part->offset);
855 if (!ret)
856 ret = fdt_appendprop_u64(blob, newoff,
857 "reg", part->size);
858 } else {
859 ret = fdt_setprop_u32(blob, newoff,
860 "reg", part->offset);
861 if (!ret)
862 ret = fdt_appendprop_u32(blob, newoff,
863 "reg", part->size);
864 }
865
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100866 if (ret == -FDT_ERR_NOSPACE) {
867 ret = fdt_increase_size(blob, 512);
868 if (!ret)
869 goto add_reg;
870 else
871 goto err_size;
872 } else if (ret < 0)
873 goto err_prop;
874
875add_label:
876 ret = fdt_setprop_string(blob, newoff, "label", part->name);
877 if (ret == -FDT_ERR_NOSPACE) {
878 ret = fdt_increase_size(blob, 512);
879 if (!ret)
880 goto add_label;
881 else
882 goto err_size;
883 } else if (ret < 0)
884 goto err_prop;
885
886 part_num++;
887 }
888 return 0;
889err_size:
890 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
891 return ret;
892err_prop:
893 printf("Can't add property: %s\n", fdt_strerror(ret));
894 return ret;
895}
896
897/*
898 * Update partitions in nor/nand nodes using info from
899 * mtdparts environment variable. The nodes to update are
900 * specified by node_info structure which contains mtd device
901 * type and compatible string: E. g. the board code in
902 * ft_board_setup() could use:
903 *
904 * struct node_info nodes[] = {
905 * { "fsl,mpc5121-nfc", MTD_DEV_TYPE_NAND, },
906 * { "cfi-flash", MTD_DEV_TYPE_NOR, },
907 * };
908 *
909 * fdt_fixup_mtdparts(blob, nodes, ARRAY_SIZE(nodes));
910 */
Masahiro Yamada5f4e32d2018-07-19 16:28:22 +0900911void fdt_fixup_mtdparts(void *blob, const struct node_info *node_info,
912 int node_info_size)
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100913{
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100914 struct mtd_device *dev;
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100915 int i, idx;
916 int noff;
917
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100918 if (mtdparts_init() != 0)
919 return;
920
921 for (i = 0; i < node_info_size; i++) {
922 idx = 0;
Masahiro Yamada5f4e32d2018-07-19 16:28:22 +0900923 noff = fdt_node_offset_by_compatible(blob, -1,
924 node_info[i].compat);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100925 while (noff != -FDT_ERR_NOTFOUND) {
926 debug("%s: %s, mtd dev type %d\n",
927 fdt_get_name(blob, noff, 0),
Masahiro Yamada5f4e32d2018-07-19 16:28:22 +0900928 node_info[i].compat, node_info[i].type);
929 dev = device_find(node_info[i].type, idx++);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100930 if (dev) {
931 if (fdt_node_set_part_info(blob, noff, dev))
932 return; /* return on error */
933 }
934
935 /* Jump to next flash node */
936 noff = fdt_node_offset_by_compatible(blob, noff,
Masahiro Yamada5f4e32d2018-07-19 16:28:22 +0900937 node_info[i].compat);
Anatolij Gustschin3c950e22010-03-16 17:10:05 +0100938 }
939 }
940}
941#endif
Kumar Gala49b97d92010-03-30 10:19:26 -0500942
943void fdt_del_node_and_alias(void *blob, const char *alias)
944{
945 int off = fdt_path_offset(blob, alias);
946
947 if (off < 0)
948 return;
949
950 fdt_del_node(blob, off);
951
952 off = fdt_path_offset(blob, "/aliases");
953 fdt_delprop(blob, off, alias);
954}
Kumar Galaa0342c02010-06-16 14:27:38 -0500955
Kumar Galaa0342c02010-06-16 14:27:38 -0500956/* Max address size we deal with */
957#define OF_MAX_ADDR_CELLS 4
Bin Menga0ae3802015-12-07 01:39:47 -0800958#define OF_BAD_ADDR FDT_ADDR_T_NONE
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +0100959#define OF_CHECK_COUNTS(na, ns) ((na) > 0 && (na) <= OF_MAX_ADDR_CELLS && \
960 (ns) > 0)
Kumar Galaa0342c02010-06-16 14:27:38 -0500961
962/* Debug utility */
963#ifdef DEBUG
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000964static void of_dump_addr(const char *s, const fdt32_t *addr, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -0500965{
966 printf("%s", s);
967 while(na--)
968 printf(" %08x", *(addr++));
969 printf("\n");
970}
971#else
Kim Phillips8aa5ec62013-01-16 14:00:11 +0000972static void of_dump_addr(const char *s, const fdt32_t *addr, int na) { }
Kumar Galaa0342c02010-06-16 14:27:38 -0500973#endif
974
Paul Burton0a222d52016-05-17 07:43:24 +0100975/**
976 * struct of_bus - Callbacks for bus specific translators
Paul Burton49717b12016-05-17 07:43:25 +0100977 * @name: A string used to identify this bus in debug output.
978 * @addresses: The name of the DT property from which addresses are
979 * to be read, typically "reg".
Paul Burton0a222d52016-05-17 07:43:24 +0100980 * @match: Return non-zero if the node whose parent is at
981 * parentoffset in the FDT blob corresponds to a bus
982 * of this type, otherwise return zero. If NULL a match
983 * is assumed.
Paul Burton49717b12016-05-17 07:43:25 +0100984 * @count_cells:Count how many cells (be32 values) a node whose parent
985 * is at parentoffset in the FDT blob will require to
986 * represent its address (written to *addrc) & size
987 * (written to *sizec).
988 * @map: Map the address addr from the address space of this
989 * bus to that of its parent, making use of the ranges
990 * read from DT to an array at range. na and ns are the
991 * number of cells (be32 values) used to hold and address
992 * or size, respectively, for this bus. pna is the number
993 * of cells used to hold an address for the parent bus.
994 * Returns the address in the address space of the parent
995 * bus.
996 * @translate: Update the value of the address cells at addr within an
997 * FDT by adding offset to it. na specifies the number of
998 * cells used to hold the address being translated. Returns
999 * zero on success, non-zero on error.
Paul Burton0a222d52016-05-17 07:43:24 +01001000 *
1001 * Each bus type will include a struct of_bus in the of_busses array,
1002 * providing implementations of some or all of the functions used to
1003 * match the bus & handle address translation for its children.
1004 */
Kumar Galaa0342c02010-06-16 14:27:38 -05001005struct of_bus {
1006 const char *name;
1007 const char *addresses;
Stephen Warren11e44fc2016-08-05 09:47:50 -06001008 int (*match)(const void *blob, int parentoffset);
1009 void (*count_cells)(const void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -05001010 int *addrc, int *sizec);
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001011 u64 (*map)(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -05001012 int na, int ns, int pna);
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001013 int (*translate)(fdt32_t *addr, u64 offset, int na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001014};
1015
1016/* Default translator (generic bus) */
Simon Glasseed36602017-05-18 20:09:26 -06001017void fdt_support_default_count_cells(const void *blob, int parentoffset,
Kumar Galaa0342c02010-06-16 14:27:38 -05001018 int *addrc, int *sizec)
1019{
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001020 const fdt32_t *prop;
Scott Wood6395f312010-08-12 18:37:39 -05001021
Simon Glass933cdbb2014-10-23 18:58:57 -06001022 if (addrc)
1023 *addrc = fdt_address_cells(blob, parentoffset);
Scott Wood6395f312010-08-12 18:37:39 -05001024
1025 if (sizec) {
1026 prop = fdt_getprop(blob, parentoffset, "#size-cells", NULL);
1027 if (prop)
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001028 *sizec = be32_to_cpup(prop);
Scott Wood6395f312010-08-12 18:37:39 -05001029 else
1030 *sizec = 1;
1031 }
Kumar Galaa0342c02010-06-16 14:27:38 -05001032}
1033
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001034static u64 of_bus_default_map(fdt32_t *addr, const fdt32_t *range,
Kumar Galaa0342c02010-06-16 14:27:38 -05001035 int na, int ns, int pna)
1036{
1037 u64 cp, s, da;
1038
Simon Glasseed36602017-05-18 20:09:26 -06001039 cp = fdt_read_number(range, na);
1040 s = fdt_read_number(range + na + pna, ns);
1041 da = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001042
Sekhar Norid8e9cf42018-12-06 15:20:47 +05301043 debug("OF: default map, cp=%llx, s=%llx, da=%llx\n", cp, s, da);
Kumar Galaa0342c02010-06-16 14:27:38 -05001044
1045 if (da < cp || da >= (cp + s))
1046 return OF_BAD_ADDR;
1047 return da - cp;
1048}
1049
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001050static int of_bus_default_translate(fdt32_t *addr, u64 offset, int na)
Kumar Galaa0342c02010-06-16 14:27:38 -05001051{
Simon Glasseed36602017-05-18 20:09:26 -06001052 u64 a = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001053 memset(addr, 0, na * 4);
1054 a += offset;
1055 if (na > 1)
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001056 addr[na - 2] = cpu_to_fdt32(a >> 32);
1057 addr[na - 1] = cpu_to_fdt32(a & 0xffffffffu);
Kumar Galaa0342c02010-06-16 14:27:38 -05001058
1059 return 0;
1060}
1061
Paul Burton0a222d52016-05-17 07:43:24 +01001062#ifdef CONFIG_OF_ISA_BUS
1063
1064/* ISA bus translator */
Stephen Warren11e44fc2016-08-05 09:47:50 -06001065static int of_bus_isa_match(const void *blob, int parentoffset)
Paul Burton0a222d52016-05-17 07:43:24 +01001066{
1067 const char *name;
1068
1069 name = fdt_get_name(blob, parentoffset, NULL);
1070 if (!name)
1071 return 0;
1072
1073 return !strcmp(name, "isa");
1074}
1075
Stephen Warren11e44fc2016-08-05 09:47:50 -06001076static void of_bus_isa_count_cells(const void *blob, int parentoffset,
Paul Burton0a222d52016-05-17 07:43:24 +01001077 int *addrc, int *sizec)
1078{
1079 if (addrc)
1080 *addrc = 2;
1081 if (sizec)
1082 *sizec = 1;
1083}
1084
1085static u64 of_bus_isa_map(fdt32_t *addr, const fdt32_t *range,
1086 int na, int ns, int pna)
1087{
1088 u64 cp, s, da;
1089
1090 /* Check address type match */
1091 if ((addr[0] ^ range[0]) & cpu_to_be32(1))
1092 return OF_BAD_ADDR;
1093
Simon Glasseed36602017-05-18 20:09:26 -06001094 cp = fdt_read_number(range + 1, na - 1);
1095 s = fdt_read_number(range + na + pna, ns);
1096 da = fdt_read_number(addr + 1, na - 1);
Paul Burton0a222d52016-05-17 07:43:24 +01001097
Sekhar Norid8e9cf42018-12-06 15:20:47 +05301098 debug("OF: ISA map, cp=%llx, s=%llx, da=%llx\n", cp, s, da);
Paul Burton0a222d52016-05-17 07:43:24 +01001099
1100 if (da < cp || da >= (cp + s))
1101 return OF_BAD_ADDR;
1102 return da - cp;
1103}
1104
1105static int of_bus_isa_translate(fdt32_t *addr, u64 offset, int na)
1106{
1107 return of_bus_default_translate(addr + 1, offset, na - 1);
1108}
1109
1110#endif /* CONFIG_OF_ISA_BUS */
1111
Kumar Galaa0342c02010-06-16 14:27:38 -05001112/* Array of bus specific translators */
1113static struct of_bus of_busses[] = {
Paul Burton0a222d52016-05-17 07:43:24 +01001114#ifdef CONFIG_OF_ISA_BUS
1115 /* ISA */
1116 {
1117 .name = "isa",
1118 .addresses = "reg",
1119 .match = of_bus_isa_match,
1120 .count_cells = of_bus_isa_count_cells,
1121 .map = of_bus_isa_map,
1122 .translate = of_bus_isa_translate,
1123 },
1124#endif /* CONFIG_OF_ISA_BUS */
Kumar Galaa0342c02010-06-16 14:27:38 -05001125 /* Default */
1126 {
1127 .name = "default",
1128 .addresses = "reg",
Simon Glasseed36602017-05-18 20:09:26 -06001129 .count_cells = fdt_support_default_count_cells,
Kumar Galaa0342c02010-06-16 14:27:38 -05001130 .map = of_bus_default_map,
1131 .translate = of_bus_default_translate,
1132 },
1133};
1134
Stephen Warren11e44fc2016-08-05 09:47:50 -06001135static struct of_bus *of_match_bus(const void *blob, int parentoffset)
Paul Burton0a222d52016-05-17 07:43:24 +01001136{
1137 struct of_bus *bus;
1138
1139 if (ARRAY_SIZE(of_busses) == 1)
1140 return of_busses;
1141
1142 for (bus = of_busses; bus; bus++) {
1143 if (!bus->match || bus->match(blob, parentoffset))
1144 return bus;
1145 }
1146
1147 /*
1148 * We should always have matched the default bus at least, since
1149 * it has a NULL match field. If we didn't then it somehow isn't
1150 * in the of_busses array or something equally catastrophic has
1151 * gone wrong.
1152 */
1153 assert(0);
1154 return NULL;
1155}
1156
Stephen Warren11e44fc2016-08-05 09:47:50 -06001157static int of_translate_one(const void *blob, int parent, struct of_bus *bus,
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001158 struct of_bus *pbus, fdt32_t *addr,
Kumar Galaa0342c02010-06-16 14:27:38 -05001159 int na, int ns, int pna, const char *rprop)
1160{
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001161 const fdt32_t *ranges;
Kumar Galaa0342c02010-06-16 14:27:38 -05001162 int rlen;
1163 int rone;
1164 u64 offset = OF_BAD_ADDR;
1165
1166 /* Normally, an absence of a "ranges" property means we are
1167 * crossing a non-translatable boundary, and thus the addresses
1168 * below the current not cannot be converted to CPU physical ones.
1169 * Unfortunately, while this is very clear in the spec, it's not
1170 * what Apple understood, and they do have things like /uni-n or
1171 * /ht nodes with no "ranges" property and a lot of perfectly
1172 * useable mapped devices below them. Thus we treat the absence of
1173 * "ranges" as equivalent to an empty "ranges" property which means
1174 * a 1:1 translation at that level. It's up to the caller not to try
1175 * to translate addresses that aren't supposed to be translated in
1176 * the first place. --BenH.
1177 */
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001178 ranges = fdt_getprop(blob, parent, rprop, &rlen);
Kumar Galaa0342c02010-06-16 14:27:38 -05001179 if (ranges == NULL || rlen == 0) {
Simon Glasseed36602017-05-18 20:09:26 -06001180 offset = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001181 memset(addr, 0, pna * 4);
1182 debug("OF: no ranges, 1:1 translation\n");
1183 goto finish;
1184 }
1185
1186 debug("OF: walking ranges...\n");
1187
1188 /* Now walk through the ranges */
1189 rlen /= 4;
1190 rone = na + pna + ns;
1191 for (; rlen >= rone; rlen -= rone, ranges += rone) {
1192 offset = bus->map(addr, ranges, na, ns, pna);
1193 if (offset != OF_BAD_ADDR)
1194 break;
1195 }
1196 if (offset == OF_BAD_ADDR) {
1197 debug("OF: not found !\n");
1198 return 1;
1199 }
1200 memcpy(addr, ranges + na, 4 * pna);
1201
1202 finish:
1203 of_dump_addr("OF: parent translation for:", addr, pna);
Masahiro Yamadadee37fc2018-08-06 20:47:40 +09001204 debug("OF: with offset: %llu\n", offset);
Kumar Galaa0342c02010-06-16 14:27:38 -05001205
1206 /* Translate it into parent bus space */
1207 return pbus->translate(addr, offset, pna);
1208}
1209
1210/*
1211 * Translate an address from the device-tree into a CPU physical address,
1212 * this walks up the tree and applies the various bus mappings on the
1213 * way.
1214 *
1215 * Note: We consider that crossing any level with #size-cells == 0 to mean
1216 * that translation is impossible (that is we are not dealing with a value
1217 * that can be mapped to a cpu physical address). This is not really specified
1218 * that way, but this is traditionally the way IBM at least do things
1219 */
Stephen Warren11e44fc2016-08-05 09:47:50 -06001220static u64 __of_translate_address(const void *blob, int node_offset,
1221 const fdt32_t *in_addr, const char *rprop)
Kumar Galaa0342c02010-06-16 14:27:38 -05001222{
1223 int parent;
1224 struct of_bus *bus, *pbus;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001225 fdt32_t addr[OF_MAX_ADDR_CELLS];
Kumar Galaa0342c02010-06-16 14:27:38 -05001226 int na, ns, pna, pns;
1227 u64 result = OF_BAD_ADDR;
1228
1229 debug("OF: ** translation for device %s **\n",
1230 fdt_get_name(blob, node_offset, NULL));
1231
1232 /* Get parent & match bus type */
1233 parent = fdt_parent_offset(blob, node_offset);
1234 if (parent < 0)
1235 goto bail;
Paul Burton0a222d52016-05-17 07:43:24 +01001236 bus = of_match_bus(blob, parent);
Kumar Galaa0342c02010-06-16 14:27:38 -05001237
1238 /* Cound address cells & copy address locally */
Scott Wood6395f312010-08-12 18:37:39 -05001239 bus->count_cells(blob, parent, &na, &ns);
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +01001240 if (!OF_CHECK_COUNTS(na, ns)) {
Kumar Galaa0342c02010-06-16 14:27:38 -05001241 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1242 fdt_get_name(blob, node_offset, NULL));
1243 goto bail;
1244 }
1245 memcpy(addr, in_addr, na * 4);
1246
1247 debug("OF: bus is %s (na=%d, ns=%d) on %s\n",
1248 bus->name, na, ns, fdt_get_name(blob, parent, NULL));
1249 of_dump_addr("OF: translating address:", addr, na);
1250
1251 /* Translate */
1252 for (;;) {
1253 /* Switch to parent bus */
1254 node_offset = parent;
1255 parent = fdt_parent_offset(blob, node_offset);
1256
1257 /* If root, we have finished */
1258 if (parent < 0) {
1259 debug("OF: reached root node\n");
Simon Glasseed36602017-05-18 20:09:26 -06001260 result = fdt_read_number(addr, na);
Kumar Galaa0342c02010-06-16 14:27:38 -05001261 break;
1262 }
1263
1264 /* Get new parent bus and counts */
Paul Burton0a222d52016-05-17 07:43:24 +01001265 pbus = of_match_bus(blob, parent);
Scott Wood6395f312010-08-12 18:37:39 -05001266 pbus->count_cells(blob, parent, &pna, &pns);
Przemyslaw Marczak4428f3c2016-01-12 15:40:44 +01001267 if (!OF_CHECK_COUNTS(pna, pns)) {
Kumar Galaa0342c02010-06-16 14:27:38 -05001268 printf("%s: Bad cell count for %s\n", __FUNCTION__,
1269 fdt_get_name(blob, node_offset, NULL));
1270 break;
1271 }
1272
1273 debug("OF: parent bus is %s (na=%d, ns=%d) on %s\n",
1274 pbus->name, pna, pns, fdt_get_name(blob, parent, NULL));
1275
1276 /* Apply bus translation */
1277 if (of_translate_one(blob, node_offset, bus, pbus,
1278 addr, na, ns, pna, rprop))
1279 break;
1280
1281 /* Complete the move up one level */
1282 na = pna;
1283 ns = pns;
1284 bus = pbus;
1285
1286 of_dump_addr("OF: one level translation:", addr, na);
1287 }
1288 bail:
1289
1290 return result;
1291}
1292
Stephen Warren11e44fc2016-08-05 09:47:50 -06001293u64 fdt_translate_address(const void *blob, int node_offset,
1294 const fdt32_t *in_addr)
Kumar Galaa0342c02010-06-16 14:27:38 -05001295{
1296 return __of_translate_address(blob, node_offset, in_addr, "ranges");
1297}
Kumar Gala75e73af2010-07-04 12:48:21 -05001298
Fabien Dessenne641067f2019-05-31 15:11:30 +02001299u64 fdt_translate_dma_address(const void *blob, int node_offset,
1300 const fdt32_t *in_addr)
1301{
1302 return __of_translate_address(blob, node_offset, in_addr, "dma-ranges");
1303}
1304
Kumar Gala75e73af2010-07-04 12:48:21 -05001305/**
1306 * fdt_node_offset_by_compat_reg: Find a node that matches compatiable and
1307 * who's reg property matches a physical cpu address
1308 *
1309 * @blob: ptr to device tree
1310 * @compat: compatiable string to match
1311 * @compat_off: property name
1312 *
1313 */
1314int fdt_node_offset_by_compat_reg(void *blob, const char *compat,
1315 phys_addr_t compat_off)
1316{
1317 int len, off = fdt_node_offset_by_compatible(blob, -1, compat);
1318 while (off != -FDT_ERR_NOTFOUND) {
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001319 const fdt32_t *reg = fdt_getprop(blob, off, "reg", &len);
Kumar Gala75e73af2010-07-04 12:48:21 -05001320 if (reg) {
1321 if (compat_off == fdt_translate_address(blob, off, reg))
1322 return off;
1323 }
1324 off = fdt_node_offset_by_compatible(blob, off, compat);
1325 }
1326
1327 return -FDT_ERR_NOTFOUND;
1328}
1329
Kumar Galab4b847e2010-07-09 16:18:58 -05001330/**
1331 * fdt_alloc_phandle: Return next free phandle value
1332 *
1333 * @blob: ptr to device tree
1334 */
1335int fdt_alloc_phandle(void *blob)
1336{
Masahiro Yamadab4141192014-11-07 03:03:31 +09001337 int offset;
1338 uint32_t phandle = 0;
Kumar Gala75e73af2010-07-04 12:48:21 -05001339
Kumar Galab4b847e2010-07-09 16:18:58 -05001340 for (offset = fdt_next_node(blob, -1, NULL); offset >= 0;
1341 offset = fdt_next_node(blob, offset, NULL)) {
Timur Tabi50bf17b2011-09-20 18:24:35 -05001342 phandle = max(phandle, fdt_get_phandle(blob, offset));
Kumar Galab4b847e2010-07-09 16:18:58 -05001343 }
1344
1345 return phandle + 1;
1346}
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001347
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001348/*
Kumar Galaf117c0f2011-08-01 00:23:23 -05001349 * fdt_set_phandle: Create a phandle property for the given node
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001350 *
1351 * @fdt: ptr to device tree
1352 * @nodeoffset: node to update
1353 * @phandle: phandle value to set (must be unique)
Kumar Galaf117c0f2011-08-01 00:23:23 -05001354 */
1355int fdt_set_phandle(void *fdt, int nodeoffset, uint32_t phandle)
Gerald Van Barena8d2a752011-07-14 21:40:10 -04001356{
1357 int ret;
1358
1359#ifdef DEBUG
1360 int off = fdt_node_offset_by_phandle(fdt, phandle);
1361
1362 if ((off >= 0) && (off != nodeoffset)) {
1363 char buf[64];
1364
1365 fdt_get_path(fdt, nodeoffset, buf, sizeof(buf));
1366 printf("Trying to update node %s with phandle %u ",
1367 buf, phandle);
1368
1369 fdt_get_path(fdt, off, buf, sizeof(buf));
1370 printf("that already exists in node %s.\n", buf);
1371 return -FDT_ERR_BADPHANDLE;
1372 }
1373#endif
1374
1375 ret = fdt_setprop_cell(fdt, nodeoffset, "phandle", phandle);
1376 if (ret < 0)
1377 return ret;
1378
1379 /*
1380 * For now, also set the deprecated "linux,phandle" property, so that we
1381 * don't break older kernels.
1382 */
1383 ret = fdt_setprop_cell(fdt, nodeoffset, "linux,phandle", phandle);
1384
1385 return ret;
1386}
1387
Kumar Gala10aeabd2011-08-01 00:25:20 -05001388/*
1389 * fdt_create_phandle: Create a phandle property for the given node
1390 *
1391 * @fdt: ptr to device tree
1392 * @nodeoffset: node to update
1393 */
Timur Tabi3c927cc2011-09-20 18:24:34 -05001394unsigned int fdt_create_phandle(void *fdt, int nodeoffset)
Kumar Gala10aeabd2011-08-01 00:25:20 -05001395{
1396 /* see if there is a phandle already */
1397 int phandle = fdt_get_phandle(fdt, nodeoffset);
1398
1399 /* if we got 0, means no phandle so create one */
1400 if (phandle == 0) {
Timur Tabi3c927cc2011-09-20 18:24:34 -05001401 int ret;
1402
Kumar Gala10aeabd2011-08-01 00:25:20 -05001403 phandle = fdt_alloc_phandle(fdt);
Timur Tabi3c927cc2011-09-20 18:24:34 -05001404 ret = fdt_set_phandle(fdt, nodeoffset, phandle);
1405 if (ret < 0) {
1406 printf("Can't set phandle %u: %s\n", phandle,
1407 fdt_strerror(ret));
1408 return 0;
1409 }
Kumar Gala10aeabd2011-08-01 00:25:20 -05001410 }
1411
1412 return phandle;
1413}
1414
Shengzhou Liu2a523f52011-10-14 16:26:05 +08001415/*
1416 * fdt_set_node_status: Set status for the given node
1417 *
1418 * @fdt: ptr to device tree
1419 * @nodeoffset: node to update
1420 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1421 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1422 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1423 */
1424int fdt_set_node_status(void *fdt, int nodeoffset,
1425 enum fdt_status status, unsigned int error_code)
1426{
1427 char buf[16];
1428 int ret = 0;
1429
1430 if (nodeoffset < 0)
1431 return nodeoffset;
1432
1433 switch (status) {
1434 case FDT_STATUS_OKAY:
1435 ret = fdt_setprop_string(fdt, nodeoffset, "status", "okay");
1436 break;
1437 case FDT_STATUS_DISABLED:
1438 ret = fdt_setprop_string(fdt, nodeoffset, "status", "disabled");
1439 break;
1440 case FDT_STATUS_FAIL:
1441 ret = fdt_setprop_string(fdt, nodeoffset, "status", "fail");
1442 break;
1443 case FDT_STATUS_FAIL_ERROR_CODE:
1444 sprintf(buf, "fail-%d", error_code);
1445 ret = fdt_setprop_string(fdt, nodeoffset, "status", buf);
1446 break;
1447 default:
1448 printf("Invalid fdt status: %x\n", status);
1449 ret = -1;
1450 break;
1451 }
1452
1453 return ret;
1454}
1455
1456/*
1457 * fdt_set_status_by_alias: Set status for the given node given an alias
1458 *
1459 * @fdt: ptr to device tree
1460 * @alias: alias of node to update
1461 * @status: FDT_STATUS_OKAY, FDT_STATUS_DISABLED,
1462 * FDT_STATUS_FAIL, FDT_STATUS_FAIL_ERROR_CODE
1463 * @error_code: optional, only used if status is FDT_STATUS_FAIL_ERROR_CODE
1464 */
1465int fdt_set_status_by_alias(void *fdt, const char* alias,
1466 enum fdt_status status, unsigned int error_code)
1467{
1468 int offset = fdt_path_offset(fdt, alias);
1469
1470 return fdt_set_node_status(fdt, offset, status, error_code);
1471}
1472
Tom Wai-Hong Tam096eb3f2012-12-05 14:46:41 +00001473#if defined(CONFIG_VIDEO) || defined(CONFIG_LCD)
Anatolij Gustschinbeca5a52010-08-18 11:25:20 +02001474int fdt_add_edid(void *blob, const char *compat, unsigned char *edid_buf)
1475{
1476 int noff;
1477 int ret;
1478
1479 noff = fdt_node_offset_by_compatible(blob, -1, compat);
1480 if (noff != -FDT_ERR_NOTFOUND) {
1481 debug("%s: %s\n", fdt_get_name(blob, noff, 0), compat);
1482add_edid:
1483 ret = fdt_setprop(blob, noff, "edid", edid_buf, 128);
1484 if (ret == -FDT_ERR_NOSPACE) {
1485 ret = fdt_increase_size(blob, 512);
1486 if (!ret)
1487 goto add_edid;
1488 else
1489 goto err_size;
1490 } else if (ret < 0) {
1491 printf("Can't add property: %s\n", fdt_strerror(ret));
1492 return ret;
1493 }
1494 }
1495 return 0;
1496err_size:
1497 printf("Can't increase blob size: %s\n", fdt_strerror(ret));
1498 return ret;
1499}
1500#endif
Timur Tabibb682002011-05-03 13:24:07 -05001501
1502/*
1503 * Verify the physical address of device tree node for a given alias
1504 *
1505 * This function locates the device tree node of a given alias, and then
1506 * verifies that the physical address of that device matches the given
1507 * parameter. It displays a message if there is a mismatch.
1508 *
1509 * Returns 1 on success, 0 on failure
1510 */
1511int fdt_verify_alias_address(void *fdt, int anode, const char *alias, u64 addr)
1512{
1513 const char *path;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001514 const fdt32_t *reg;
Timur Tabibb682002011-05-03 13:24:07 -05001515 int node, len;
1516 u64 dt_addr;
1517
1518 path = fdt_getprop(fdt, anode, alias, NULL);
1519 if (!path) {
1520 /* If there's no such alias, then it's not a failure */
1521 return 1;
1522 }
1523
1524 node = fdt_path_offset(fdt, path);
1525 if (node < 0) {
1526 printf("Warning: device tree alias '%s' points to invalid "
1527 "node %s.\n", alias, path);
1528 return 0;
1529 }
1530
1531 reg = fdt_getprop(fdt, node, "reg", &len);
1532 if (!reg) {
1533 printf("Warning: device tree node '%s' has no address.\n",
1534 path);
1535 return 0;
1536 }
1537
1538 dt_addr = fdt_translate_address(fdt, node, reg);
1539 if (addr != dt_addr) {
Masahiro Yamadadee37fc2018-08-06 20:47:40 +09001540 printf("Warning: U-Boot configured device %s at address %llu,\n"
1541 "but the device tree has it address %llx.\n",
1542 alias, addr, dt_addr);
Timur Tabibb682002011-05-03 13:24:07 -05001543 return 0;
1544 }
1545
1546 return 1;
1547}
1548
1549/*
1550 * Returns the base address of an SOC or PCI node
1551 */
Simon Glassec002112017-05-18 20:09:00 -06001552u64 fdt_get_base_address(const void *fdt, int node)
Timur Tabibb682002011-05-03 13:24:07 -05001553{
1554 int size;
Kim Phillips8aa5ec62013-01-16 14:00:11 +00001555 const fdt32_t *prop;
Timur Tabibb682002011-05-03 13:24:07 -05001556
Simon Glass336a4482017-07-04 13:31:20 -06001557 prop = fdt_getprop(fdt, node, "reg", &size);
Timur Tabibb682002011-05-03 13:24:07 -05001558
Masahiro Yamadae3665ba2019-06-27 16:39:57 +09001559 return prop ? fdt_translate_address(fdt, node, prop) : OF_BAD_ADDR;
Timur Tabibb682002011-05-03 13:24:07 -05001560}
Alexander Grafc48e6862014-04-11 17:09:41 +02001561
1562/*
1563 * Read a property of size <prop_len>. Currently only supports 1 or 2 cells.
1564 */
1565static int fdt_read_prop(const fdt32_t *prop, int prop_len, int cell_off,
1566 uint64_t *val, int cells)
1567{
1568 const fdt32_t *prop32 = &prop[cell_off];
1569 const fdt64_t *prop64 = (const fdt64_t *)&prop[cell_off];
1570
1571 if ((cell_off + cells) > prop_len)
1572 return -FDT_ERR_NOSPACE;
1573
1574 switch (cells) {
1575 case 1:
1576 *val = fdt32_to_cpu(*prop32);
1577 break;
1578 case 2:
1579 *val = fdt64_to_cpu(*prop64);
1580 break;
1581 default:
1582 return -FDT_ERR_NOSPACE;
1583 }
1584
1585 return 0;
1586}
1587
1588/**
1589 * fdt_read_range - Read a node's n'th range property
1590 *
1591 * @fdt: ptr to device tree
1592 * @node: offset of node
1593 * @n: range index
1594 * @child_addr: pointer to storage for the "child address" field
1595 * @addr: pointer to storage for the CPU view translated physical start
1596 * @len: pointer to storage for the range length
1597 *
1598 * Convenience function that reads and interprets a specific range out of
1599 * a number of the "ranges" property array.
1600 */
1601int fdt_read_range(void *fdt, int node, int n, uint64_t *child_addr,
1602 uint64_t *addr, uint64_t *len)
1603{
1604 int pnode = fdt_parent_offset(fdt, node);
1605 const fdt32_t *ranges;
1606 int pacells;
1607 int acells;
1608 int scells;
1609 int ranges_len;
1610 int cell = 0;
1611 int r = 0;
1612
1613 /*
1614 * The "ranges" property is an array of
1615 * { <child address> <parent address> <size in child address space> }
1616 *
1617 * All 3 elements can span a diffent number of cells. Fetch their size.
1618 */
1619 pacells = fdt_getprop_u32_default_node(fdt, pnode, 0, "#address-cells", 1);
1620 acells = fdt_getprop_u32_default_node(fdt, node, 0, "#address-cells", 1);
1621 scells = fdt_getprop_u32_default_node(fdt, node, 0, "#size-cells", 1);
1622
1623 /* Now try to get the ranges property */
1624 ranges = fdt_getprop(fdt, node, "ranges", &ranges_len);
1625 if (!ranges)
1626 return -FDT_ERR_NOTFOUND;
1627 ranges_len /= sizeof(uint32_t);
1628
1629 /* Jump to the n'th entry */
1630 cell = n * (pacells + acells + scells);
1631
1632 /* Read <child address> */
1633 if (child_addr) {
1634 r = fdt_read_prop(ranges, ranges_len, cell, child_addr,
1635 acells);
1636 if (r)
1637 return r;
1638 }
1639 cell += acells;
1640
1641 /* Read <parent address> */
1642 if (addr)
1643 *addr = fdt_translate_address(fdt, node, ranges + cell);
1644 cell += pacells;
1645
1646 /* Read <size in child address space> */
1647 if (len) {
1648 r = fdt_read_prop(ranges, ranges_len, cell, len, scells);
1649 if (r)
1650 return r;
1651 }
1652
1653 return 0;
1654}
Hans de Goeded4f495a2014-11-17 15:29:11 +01001655
1656/**
1657 * fdt_setup_simplefb_node - Fill and enable a simplefb node
1658 *
1659 * @fdt: ptr to device tree
1660 * @node: offset of the simplefb node
1661 * @base_address: framebuffer base address
1662 * @width: width in pixels
1663 * @height: height in pixels
1664 * @stride: bytes per line
1665 * @format: pixel format string
1666 *
1667 * Convenience function to fill and enable a simplefb node.
1668 */
1669int fdt_setup_simplefb_node(void *fdt, int node, u64 base_address, u32 width,
1670 u32 height, u32 stride, const char *format)
1671{
1672 char name[32];
1673 fdt32_t cells[4];
1674 int i, addrc, sizec, ret;
1675
Simon Glasseed36602017-05-18 20:09:26 -06001676 fdt_support_default_count_cells(fdt, fdt_parent_offset(fdt, node),
1677 &addrc, &sizec);
Hans de Goeded4f495a2014-11-17 15:29:11 +01001678 i = 0;
1679 if (addrc == 2)
1680 cells[i++] = cpu_to_fdt32(base_address >> 32);
1681 cells[i++] = cpu_to_fdt32(base_address);
1682 if (sizec == 2)
1683 cells[i++] = 0;
1684 cells[i++] = cpu_to_fdt32(height * stride);
1685
1686 ret = fdt_setprop(fdt, node, "reg", cells, sizeof(cells[0]) * i);
1687 if (ret < 0)
1688 return ret;
1689
Masahiro Yamadadee37fc2018-08-06 20:47:40 +09001690 snprintf(name, sizeof(name), "framebuffer@%llx", base_address);
Hans de Goeded4f495a2014-11-17 15:29:11 +01001691 ret = fdt_set_name(fdt, node, name);
1692 if (ret < 0)
1693 return ret;
1694
1695 ret = fdt_setprop_u32(fdt, node, "width", width);
1696 if (ret < 0)
1697 return ret;
1698
1699 ret = fdt_setprop_u32(fdt, node, "height", height);
1700 if (ret < 0)
1701 return ret;
1702
1703 ret = fdt_setprop_u32(fdt, node, "stride", stride);
1704 if (ret < 0)
1705 return ret;
1706
1707 ret = fdt_setprop_string(fdt, node, "format", format);
1708 if (ret < 0)
1709 return ret;
1710
1711 ret = fdt_setprop_string(fdt, node, "status", "okay");
1712 if (ret < 0)
1713 return ret;
1714
1715 return 0;
1716}
Tim Harvey08daa252015-04-08 11:45:39 -07001717
1718/*
1719 * Update native-mode in display-timings from display environment variable.
1720 * The node to update are specified by path.
1721 */
1722int fdt_fixup_display(void *blob, const char *path, const char *display)
1723{
1724 int off, toff;
1725
1726 if (!display || !path)
1727 return -FDT_ERR_NOTFOUND;
1728
1729 toff = fdt_path_offset(blob, path);
1730 if (toff >= 0)
1731 toff = fdt_subnode_offset(blob, toff, "display-timings");
1732 if (toff < 0)
1733 return toff;
1734
1735 for (off = fdt_first_subnode(blob, toff);
1736 off >= 0;
1737 off = fdt_next_subnode(blob, off)) {
1738 uint32_t h = fdt_get_phandle(blob, off);
1739 debug("%s:0x%x\n", fdt_get_name(blob, off, NULL),
1740 fdt32_to_cpu(h));
1741 if (strcasecmp(fdt_get_name(blob, off, NULL), display) == 0)
1742 return fdt_setprop_u32(blob, toff, "native-mode", h);
1743 }
1744 return toff;
1745}
Pantelis Antonioufc7c3182017-09-04 23:12:11 +03001746
1747#ifdef CONFIG_OF_LIBFDT_OVERLAY
1748/**
1749 * fdt_overlay_apply_verbose - Apply an overlay with verbose error reporting
1750 *
1751 * @fdt: ptr to device tree
1752 * @fdto: ptr to device tree overlay
1753 *
1754 * Convenience function to apply an overlay and display helpful messages
1755 * in the case of an error
1756 */
1757int fdt_overlay_apply_verbose(void *fdt, void *fdto)
1758{
1759 int err;
1760 bool has_symbols;
1761
1762 err = fdt_path_offset(fdt, "/__symbols__");
1763 has_symbols = err >= 0;
1764
1765 err = fdt_overlay_apply(fdt, fdto);
1766 if (err < 0) {
1767 printf("failed on fdt_overlay_apply(): %s\n",
1768 fdt_strerror(err));
1769 if (!has_symbols) {
1770 printf("base fdt does did not have a /__symbols__ node\n");
1771 printf("make sure you've compiled with -@\n");
1772 }
1773 }
1774 return err;
1775}
1776#endif